Merge branch '2019-09-05-add-io-manager' of git+ssh://sourceware.org/git/lvm2 into 2019-09-05-add-io-manager

[io-manager] Reopen without O_DIRECT if we need to write a partial block.
Still need to do a bit more testing. Also need to think more about how we guarantee that we've reopened the same device. Pass in a device_id_extractor object to push the issue up a layer?
2025-10-12 07:33:16 +03:00 · 2019-09-09 18:21:20 +01:00 · 2019-09-09 18:18:46 +01:00 · 2019-09-06 14:40:39 -05:00 · 2019-09-06 10:22:02 +01:00
371 changed files with 12416 additions and 24461 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -30,7 +30,7 @@ make.tmpl
 /config.log
 /config.status
 /configure.scan
-/cscope.*
+/cscope.out
 /html/
 /reports/
 /tags
@@ -38,10 +38,6 @@ make.tmpl

 coverity/coverity_model.xml

-# gcov files:
-*.gcda
-*.gcno
-
 tools/man-generator
 tools/man-generator.c

--- a/11
+++ b/11
@@ -1,6 +1,7 @@
 This tree contains the LVM2 and device-mapper tools and libraries.

-This is development branch, for stable 2.02 release see stable-2.02 branch.
+This is development branch, for stable 2.02 release see 2018-06-01-stable
+branch.

 For more information about LVM2 read the changelog in the WHATS_NEW file.
 Installation instructions are in INSTALL.
@@ -9,6 +10,7 @@ There is no warranty - see COPYING and COPYING.LIB.

 Tarballs are available from:
  ftp://sourceware.org/pub/lvm2/
+  ftp://sources.redhat.com/pub/lvm2/
  https://github.com/lvmteam/lvm2/releases

 The source code is stored in git:
@@ -43,9 +45,6 @@ Report upstream bugs at:
 or open issues at:
  https://github.com/lvmteam/lvm2/issues

-The source code repository used until 7th June 2012 is accessible using CVS:
+The source code repository used until 7th June 2012 is accessible here:
+  http://sources.redhat.com/cgi-bin/cvsweb.cgi/LVM2/?cvsroot=lvm2.

-  cvs -d :pserver:cvs@sourceware.org:/cvs/lvm2 login cvs
-  cvs -d :pserver:cvs@sourceware.org:/cvs/lvm2 checkout LVM2
-
-The password is cvs.
--- a/2
+++ b/2
@@ -1 +1 @@
-2.03.11(2)-git (2020-08-09)
+2.03.06(2)-git (2019-06-15)
--- a/2
+++ b/2
@@ -1 +1 @@
-1.02.175-git (2020-08-09)
+1.02.165-git (2019-06-15)
--- a/97
+++ b/97
@@ -1,98 +1,5 @@
-Version 2.03.11 - 
-==================================
-  Enhance error handling for fsadm and hanled correct fsck result.
-  Dmeventd lvm plugin ignores higher reserved_stack lvm.conf values.
-  Support using BLKZEROOUT for clearing devices.
-  Support interruption when wipping LVs.
-  Support interruption for bcache waiting.
-  Fix bcache when device has too many failing writes.
-  Fix bcache waiting for IO completion with failing disks.
-  Configure use own python path name order to prefer using python3.
-  Add configure --enable-editline support as an alternative to readline.
-  Enhance reporting and error handling when creating thin volumes.
-  Enable vgsplit for VDO volumes.
-  Lvextend of vdo pool volumes ensure at least 1 new VDO slab is added.
-  Use revert_lv() on reload error path after vg_revert().
-  Configure --with-integrity enabled.
-  Restore lost signal blocking while VG lock is held.
-  Improve estimation of needed extents when creating thin-pool.
-  Use extra 1% when resizing thin-pool metadata LV with --use-policy.
-  Enhance --use-policy percentage rounding.
-  Configure --with-vdo and --with-writecache as internal segments.
-  Improving VDO man page examples.
-  Switch code base to use flexible array syntax.
-  Fix 64bit math when calculation cachevol size.
-  Preserve uint32_t for seqno handling.
-  Switch from mmap to plain read when loading regular files.
-  Update lvmvdo man page and better explain DISCARD usage.
-
-Version 2.03.10 - 09th August 2020
-==================================
-  Add writecache and integrity support to lvmdbusd.
-  Generate unique cachevol name when default required from lvcreate.
-  Converting RAID1 volume to one with same number of legs now succeeds with a
-  warning.
-  Fix conversion to raid from striped lagging type.
-  Fix conversion to 'mirrored' mirror log with larger regionsize.
-  Zero pool metadata on allocation (disable with allocation/zero_metadata=0).
-  Failure in zeroing or wiping will fail command (bypass with -Zn, -Wn).
-  Add lvcreate of new cache or writecache lv with single command.
-  Fix running out of free buffers for async writing for larger writes.
-  Add integrity with raid capability.
-  Fix support for lvconvert --repair used by foreign apps (i.e. Docker).
-
-Version 2.03.09 - 26th March 2020
-=================================
-  Fix formating of vdopool (vdo_slab_size_mb was smaller by 2 bits).
-  Fix showing of a dm kernel error when uncaching a volume with cachevol.
-
-Version 2.03.08 - 11th February 2020
-====================================
-  Prevent problematic snapshots of writecache volumes.
-  Add error handling for failing allocation in _reserve_area().
-  Fix memleak in syncing of internal cache.
-  Fix pvck dump_current_text memleak.
-  Fix lvmlockd result code on error path for _query_lock_lv().
-  Update pvck man page and help output.
-  Reject invalid writecache high/low_watermark setting.
-  Report writecache status.
-  Accept more output lines from vdo_format.
-  Prohibit reshaping of stacked raid LVs.
-  Avoid running cache input arg validation when creating vdo pool.
-  Prevent raid reshaping of stacked volumes.
-  Added VDO lvmdbusd methods for enable/disable compression & dedupe.
-  Added VDO lvmdbusd method for converting LV to VDO pool.
-
-Version 2.03.07 - 30th November 2019
-====================================
-  Subcommand in vgck for repairing headers and metadata.
-  Ensure minimum required region size on striped RaidLV creation.
-  Fix resize of thin-pool with data and metadata of different segtype.
-  Improve mirror type leg splitting.
-  Improve error path handling in daemons on shutdown.
-  Fix activation order when removing merged snapshot.
-  Experimental VDO support for lvmdbusd.
-
-Version 2.03.06 - 23rd October 2019
-===================================
-  Add _cpool suffix to cache-pool LV name when used by caching LV.
-  No longer store extra UUID for cmeta and cdata cachevol layer.
-  Enhance activation of cache devices with cachevols.
-  Add _cvol in list of protected suffixes and start use it with DM UUID.
-  Rename LV converted to cachevol to use _cvol suffix.
-  Use normal LVs for wiping of cachevols.
-  Reload cleanered cache DM only with cleaner policy.
-  Fix cmd return when zeroing of cachevol fails.
-  Extend lvs to show all VDO properties.
-  Preserve VDO write policy with vdopool.
-  Increase default vdo bio threads to 4.
-  Continue report when cache_status fails.
-  Add support for DM_DEVICE_GET_TARGET_VERSION into device_mapper.
-  Fix cmirrord usage of header files from device_mapper subdir.
-  Allow standalone activation of VDO pool just like for thin-pools.
-  Activate thin-pool layered volume as 'read-only' device.
-  Ignore crypto devices with UUID signature CRYPT-SUBDEV.
-  Enhance validation for thin and cache pool conversion and swapping.
+Version 2.03.06 - 
+================================
  Improve internal removal of cached devices.
  Synchronize with udev when dropping snapshot.
  Add missing device synchronization point before removing pvmove node.
--- a/25
+++ b/25
@@ -1,26 +1,5 @@
-Version 1.02.175 - 
-===================================
-
-Version 1.02.173 - 09th August 2020
-===================================
-  Add support for VDO in blkdeactivate script.
-
-Version 1.02.171 - 26th March 2020
-==================================
-  Try to remove all created devices on dm preload tree error path.
-  Fix dm_list interators with gcc 10 optimization (-ftree-pta).
-  Dmeventd handles timer without looping on short intervals.
-
-Version 1.02.169 - 11th February 2020
-=====================================
-  Enhance error messages for device creation.
-
-Version 1.02.167 - 30th November 2019
-=====================================
-
-Version 1.02.165 - 23rd October 2019
-====================================
-  Add support for DM_DEVICE_GET_TARGET_VERSION.
+Version 1.02.165 - 
+=================================
  Add debug of dmsetup udevcomplete with hexa print DM_COOKIE_COMPLETED.
  Fix versioning of dm_stats_create_region and dm_stats_create_region.

--- a/aclocal.m4
+++ b/aclocal.m4
@@ -1,6 +1,6 @@
-# generated automatically by aclocal 1.16.2 -*- Autoconf -*-
+# generated automatically by aclocal 1.15.1 -*- Autoconf -*-

-# Copyright (C) 1996-2020 Free Software Foundation, Inc.
+# Copyright (C) 1996-2017 Free Software Foundation, Inc.

 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -413,7 +413,7 @@ AS_IF([test "$AS_TR_SH([with_]m4_tolower([$1]))" = "yes"],
        [AC_DEFINE([HAVE_][$1], 1, [Enable ]m4_tolower([$1])[ support])])
 ])dnl PKG_HAVE_DEFINE_WITH_MODULES

-# Copyright (C) 1999-2020 Free Software Foundation, Inc.
+# Copyright (C) 1999-2017 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
@@ -446,12 +446,10 @@ AC_DEFUN([AM_PATH_PYTHON],
 [
  dnl Find a Python interpreter.  Python versions prior to 2.0 are not
  dnl supported. (2.0 was released on October 16, 2000).
+  dnl FIXME: Remove the need to hard-code Python versions here.
  m4_define_default([_AM_PYTHON_INTERPRETER_LIST],
-[python python2 python3 dnl
- python3.9 python3.8 python3.7 python3.6 python3.5 python3.4 python3.3 dnl
- python3.2 python3.1 python3.0 dnl
- python2.7 python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 dnl
- python2.0])
+[python python2 python3 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 python2.7 dnl
+ python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python2.0])

  AC_ARG_VAR([PYTHON], [the Python interpreter])

@@ -651,7 +649,7 @@ for i in list(range(0, 4)): minverhex = (minverhex << 8) + minver[[i]]
 sys.exit(sys.hexversion < minverhex)"
  AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$3], [$4])])

-# Copyright (C) 2001-2020 Free Software Foundation, Inc.
+# Copyright (C) 2001-2017 Free Software Foundation, Inc.
 #
 # This file is free software; the Free Software Foundation
 # gives unlimited permission to copy and/or distribute it,
--- a/base/data-struct/hash.c
+++ b/base/data-struct/hash.c
@@ -22,7 +22,7 @@ struct dm_hash_node {
 	void *data;
 	unsigned data_len;
 	unsigned keylen;
-	char key[];
+	char key[0];
 };

 struct dm_hash_table {
@@ -59,27 +59,26 @@ static unsigned char _nums[] = {
 	209
 };

-static struct dm_hash_node *_create_node(const void *key, unsigned len)
+static struct dm_hash_node *_create_node(const char *str, unsigned len)
 {
 	struct dm_hash_node *n = malloc(sizeof(*n) + len);

 	if (n) {
-		memcpy(n->key, key, len);
+		memcpy(n->key, str, len);
 		n->keylen = len;
 	}

 	return n;
 }

-static unsigned long _hash(const void *key, unsigned len)
+static unsigned long _hash(const char *str, unsigned len)
 {
-	const unsigned char *str = key;
 	unsigned long h = 0, g;
 	unsigned i;

 	for (i = 0; i < len; i++) {
 		h <<= 4;
-		h += _nums[*str++];
+		h += _nums[(unsigned char) *str++];
 		g = h & ((unsigned long) 0xf << 16u);
 		if (g) {
 			h ^= g >> 16u;
--- a/base/data-struct/list.h
+++ b/base/data-struct/list.h
@@ -1,8 +1,6 @@
 #ifndef BASE_DATA_STRUCT_LIST_H
 #define BASE_DATA_STRUCT_LIST_H

-#include "base/memory/container_of.h"
-
 //----------------------------------------------------------------

 /*
@@ -100,7 +98,7 @@ struct dm_list *dm_list_next(const struct dm_list *head, const struct dm_list *e
 * contained in a structure of type t, return the containing structure.
 */
 #define dm_list_struct_base(v, t, head) \
-    container_of(v, t, head)
+    ((t *)((const char *)(v) - (const char *)&((t *) 0)->head))

 /*
 * Given the address v of an instance of 'struct dm_list list' contained in
@@ -113,7 +111,7 @@ struct dm_list *dm_list_next(const struct dm_list *head, const struct dm_list *e
 * return another element f.
 */
 #define dm_struct_field(v, t, e, f) \
-    (((t *)((uintptr_t)(v) - offsetof(t, e)))->f)
+    (((t *)((uintptr_t)(v) - (uintptr_t)&((t *) 0)->e))->f)

 /*
 * Given the address v of a known element e in a known structure of type t,
--- a/base/data-struct/radix-tree-adaptive.c
+++ b/base/data-struct/radix-tree-adaptive.c
@@ -47,7 +47,7 @@ struct value_chain {
 struct prefix_chain {
 	struct value child;
 	unsigned len;
-	uint8_t prefix[];
+	uint8_t prefix[0];
 };

 struct node4 {
@@ -1032,7 +1032,7 @@ void radix_tree_iterate(struct radix_tree *rt, uint8_t *kb, uint8_t *ke,
 {
 	struct lookup_result lr = _lookup_prefix(&rt->root, kb, ke);
 	if (lr.kb == ke || _prefix_chain_matches(&lr, ke))
-		(void) _iterate(lr.v, it);
+        	_iterate(lr.v, it);
 }

 //----------------------------------------------------------------
--- a/base/memory/container_of.h
+++ b/base/memory/container_of.h
@@ -1,4 +1,4 @@
-// Copyright (C) 2018 - 2020 Red Hat, Inc. All rights reserved.
+// Copyright (C) 2018 Red Hat, Inc. All rights reserved.
 // 
 // This file is part of LVM2.
 //
@@ -13,12 +13,10 @@
 #ifndef BASE_MEMORY_CONTAINER_OF_H
 #define BASE_MEMORY_CONTAINER_OF_H

-#include <stddef.h>  // offsetof
-
 //----------------------------------------------------------------

 #define container_of(v, t, head) \
-    ((t *)((char *)(v) - offsetof(t, head)))
+    ((t *)((const char *)(v) - (const char *)&((t *) 0)->head))

 //----------------------------------------------------------------

--- a/conf/example.conf.in
+++ b/conf/example.conf.in
@@ -429,8 +429,7 @@ allocation {

 	# Configuration option allocation/cache_pool_metadata_require_separate_pvs.
 	# Cache pool metadata and data will always use different PVs.
-	# This configuration option has an automatic default value.
-	# cache_pool_metadata_require_separate_pvs = 0
+	cache_pool_metadata_require_separate_pvs = 0

 	# Configuration option allocation/cache_metadata_format.
 	# Sets default metadata format for new cache.
@@ -489,9 +488,8 @@ allocation {
 	# This configuration option does not have a default value defined.

 	# Configuration option allocation/thin_pool_metadata_require_separate_pvs.
-	# Thin pool metadata and data will always use different PVs.
-	# This configuration option has an automatic default value.
-	# thin_pool_metadata_require_separate_pvs = 0
+	# Thin pool metdata and data will always use different PVs.
+	thin_pool_metadata_require_separate_pvs = 0

 	# Configuration option allocation/thin_pool_zero.
 	# Thin pool data chunks are zeroed before they are first used.
@@ -528,11 +526,6 @@ allocation {
 	# This configuration option has an automatic default value.
 	# thin_pool_chunk_size_policy = "generic"

-	# Configuration option allocation/zero_metadata.
-	# Zero whole metadata area before use with thin or cache pool.
-	# This configuration option has an automatic default value.
-	# zero_metadata = 1
-
 	# Configuration option allocation/thin_pool_chunk_size.
 	# The minimal chunk size in KiB for thin pool volumes.
 	# Larger chunk sizes may improve performance for plain thin volumes,
@@ -628,7 +621,7 @@ allocation {
 	# Each additional thread after the first will use an additional 18MiB of RAM,
 	# plus 1.12 MiB of RAM per megabyte of configured read cache size.
 	# This configuration option has an automatic default value.
-	# vdo_bio_threads = 4
+	# vdo_bio_threads = 1

 	# Configuration option allocation/vdo_bio_rotation.
 	# Specifies the number of I/O operations to enqueue for each bio-submission
@@ -993,8 +986,7 @@ global {
 	# logs and conversion to disk/core works.
 	# 
 	# Not supported for regular operation!
-	# This configuration option has an automatic default value.
-	# support_mirrored_mirror_log = 0
+	support_mirrored_mirror_log = 0

 	# Configuration option global/raid10_segtype_default.
 	# The segment type used by the -i -m combination.
@@ -1052,8 +1044,7 @@ global {
 	# activated from these events (the default is all.)
 	# When event_activation is disabled, the system will generally run
 	# a direct activation command to activate LVs in complete VGs.
-	# This configuration option has an automatic default value.
-	# event_activation = 1
+	event_activation = 1

 	# Configuration option global/use_aio.
 	# Use async I/O when reading and writing devices.
@@ -1297,8 +1288,7 @@ activation {
 	# This enables additional checks (and if necessary, repairs) on entries
 	# in the device directory after udev has completed processing its
 	# events. Useful for diagnosing problems with LVM/udev interactions.
-	# This configuration option has an automatic default value.
-	# verify_udev_operations = 0
+	verify_udev_operations = 0

 	# Configuration option activation/retry_deactivation.
 	# Retry failed LV deactivation.
@@ -1323,27 +1313,23 @@ activation {
 	# When disabled, the striped target is used. The linear target is an
 	# optimised version of the striped target that only handles a single
 	# stripe.
-	# This configuration option has an automatic default value.
-	# use_linear_target = 1
+	use_linear_target = 1

 	# Configuration option activation/reserved_stack.
 	# Stack size in KiB to reserve for use while devices are suspended.
 	# Insufficent reserve risks I/O deadlock during device suspension.
-	# This configuration option has an automatic default value.
-	# reserved_stack = 64
+	reserved_stack = 64

 	# Configuration option activation/reserved_memory.
 	# Memory size in KiB to reserve for use while devices are suspended.
 	# Insufficent reserve risks I/O deadlock during device suspension.
-	# This configuration option has an automatic default value.
-	# reserved_memory = 8192
+	reserved_memory = 8192

 	# Configuration option activation/process_priority.
 	# Nice value used while devices are suspended.
 	# Use a high priority so that LVs are suspended
 	# for the shortest possible time.
-	# This configuration option has an automatic default value.
-	# process_priority = -18
+	process_priority = -18

 	# Configuration option activation/volume_list.
 	# Only LVs selected by this list are activated.
@@ -1460,8 +1446,7 @@ activation {
 	#   auto
 	#     Use default value chosen by kernel.
 	# 
-	# This configuration option has an automatic default value.
-	# readahead = "auto"
+	readahead = "auto"

 	# Configuration option activation/raid_fault_policy.
 	# Defines how a device failure in a RAID LV is handled.
@@ -1597,8 +1582,7 @@ activation {
 	# 8.4G, it is extended to 14.4G:
 	# vdo_pool_autoextend_threshold = 70
 	# 
-	# This configuration option has an automatic default value.
-	# vdo_pool_autoextend_threshold = 100
+	vdo_pool_autoextend_threshold = 100

 	# Configuration option activation/vdo_pool_autoextend_percent.
 	# Auto-extending a VDO pool adds this percent extra space.
@@ -1634,8 +1618,7 @@ activation {
 	# Use the old behavior of mlockall to pin all memory.
 	# Prior to version 2.02.62, LVM used mlockall() to pin the whole
 	# process's memory while activating devices.
-	# This configuration option has an automatic default value.
-	# use_mlockall = 0
+	use_mlockall = 0

 	# Configuration option activation/monitoring.
 	# Monitor LVs that are activated.
@@ -1650,8 +1633,7 @@ activation {
 	# intervals of this number of seconds. If this is set to 0 and there
 	# is only one thing to wait for, there are no progress reports, but
 	# the process is awoken immediately once the operation is complete.
-	# This configuration option has an automatic default value.
-	# polling_interval = 15
+	polling_interval = 15

 	# Configuration option activation/auto_set_activation_skip.
 	# Set the activation skip flag on new thin snapshot LVs.
@@ -2207,8 +2189,7 @@ dmeventd {
 	# failures. It removes failed devices from a volume group and
 	# reconfigures a mirror as necessary. If no mirror library is
 	# provided, mirrors are not monitored through dmeventd.
-	# This configuration option has an automatic default value.
-	# mirror_library = "libdevmapper-event-lvm2mirror.so"
+	mirror_library = "libdevmapper-event-lvm2mirror.so"

 	# Configuration option dmeventd/raid_library.
 	# This configuration option has an automatic default value.
@@ -2219,16 +2200,14 @@ dmeventd {
 	# libdevmapper-event-lvm2snapshot.so monitors the filling of snapshots
 	# and emits a warning through syslog when the usage exceeds 80%. The
 	# warning is repeated when 85%, 90% and 95% of the snapshot is filled.
-	# This configuration option has an automatic default value.
-	# snapshot_library = "libdevmapper-event-lvm2snapshot.so"
+	snapshot_library = "libdevmapper-event-lvm2snapshot.so"

 	# Configuration option dmeventd/thin_library.
 	# The library dmeventd uses when monitoring a thin device.
 	# libdevmapper-event-lvm2thin.so monitors the filling of a pool
 	# and emits a warning through syslog when the usage exceeds 80%. The
 	# warning is repeated when 85%, 90% and 95% of the pool is filled.
-	# This configuration option has an automatic default value.
-	# thin_library = "libdevmapper-event-lvm2thin.so"
+	thin_library = "libdevmapper-event-lvm2thin.so"

 	# Configuration option dmeventd/thin_command.
 	# The plugin runs command with each 5% increment when thin-pool data volume
--- a/227
+++ b/227
@@ -753,8 +753,6 @@ BUILD_CMIRRORD
 BLKID_PC
 MODPROBE_CMD
 MSGFMT
-EDITLINE_LIBS
-EDITLINE_CFLAGS
 PYTHON3_CONFIG
 pkgpyexecdir
 pyexecdir
@@ -920,9 +918,7 @@ enable_cache_check_needs_check
 with_vdo
 with_vdo_format
 with_writecache
-with_integrity
 enable_readline
-enable_editline
 enable_realtime
 enable_ocf
 with_ocfdir
@@ -963,7 +959,6 @@ enable_fsadm
 enable_blkdeactivate
 enable_dmeventd
 enable_selinux
-enable_blkzeroout
 enable_nls
 with_localedir
 with_confdir
@@ -1019,9 +1014,7 @@ SYSTEMD_CFLAGS
 SYSTEMD_LIBS
 UDEV_CFLAGS
 UDEV_LIBS
-PYTHON
-EDITLINE_CFLAGS
-EDITLINE_LIBS'
+PYTHON'


 # Initialize some variables set by options.
@@ -1644,7 +1637,6 @@ Optional Features:
  --disable-cache_check_needs_check
                          required if cache_check version is < 0.5
  --disable-readline      disable readline support
-  --enable-editline       enable editline support
  --disable-realtime      disable realtime clock support
  --enable-ocf            enable Open Cluster Framework (OCF) compliant
                          resource agents
@@ -1685,7 +1677,6 @@ Optional Features:
  --disable-blkdeactivate disable blkdeactivate
  --enable-dmeventd       enable the device-mapper event daemon
  --disable-selinux       disable selinux support
-  --disable-blkzeroout    do not use BLKZEROOUT for device zeroing
  --enable-nls            enable Native Language Support

 Optional Packages:
@@ -1724,16 +1715,15 @@ Optional Packages:
                          cache_restore tool: [autodetect]
  --with-vdo=TYPE         vdo support: internal/none [internal]
  --with-vdo-format=PATH  vdoformat tool: [autodetect]
-  --with-writecache=TYPE  writecache support: internal/none [internal]
-  --with-integrity=TYPE   integrity support: internal/none [internal]
+  --with-writecache=TYPE  writecache support: internal/none [none]
  --with-ocfdir=DIR       install OCF files in
                          [PREFIX/lib/ocf/resource.d/lvm2]
  --with-default-pid-dir=PID_DIR
-                          default directory to keep PID files in [autodetect]
+                          Default directory to keep PID files in. [autodetect]
  --with-default-dm-run-dir=DM_RUN_DIR
-                          default DM run directory [autodetect]
+                          Default DM run directory. [autodetect]
  --with-default-run-dir=RUN_DIR
-                          default LVM run directory [autodetect_run_dir/lvm]
+                          Default LVM run directory. [autodetect_run_dir/lvm]
  --with-cmirrord-pidfile=PATH
                          cmirrord pidfile [PID_DIR/cmirrord.pid]
  --with-optimisation=OPT C optimisation flag [OPT=-O2]
@@ -1824,10 +1814,6 @@ Some influential environment variables:
  UDEV_CFLAGS C compiler flags for UDEV, overriding pkg-config
  UDEV_LIBS   linker flags for UDEV, overriding pkg-config
  PYTHON      the Python interpreter
-  EDITLINE_CFLAGS
-              C compiler flags for EDITLINE, overriding pkg-config
-  EDITLINE_LIBS
-              linker flags for EDITLINE, overriding pkg-config

 Use these variables to override the choices made by `configure' or to help
 it to find libraries and programs with nonstandard names/locations.
@@ -9598,7 +9584,7 @@ $as_echo_n "checking whether to include vdo... " >&6; }
 if test "${with_vdo+set}" = set; then :
  withval=$with_vdo; VDO=$withval
 else
-  VDO="internal"
+  VDO="none"
 fi


@@ -9758,7 +9744,7 @@ $as_echo_n "checking whether to include writecache... " >&6; }
 if test "${with_writecache+set}" = set; then :
  withval=$with_writecache; WRITECACHE=$withval
 else
-  WRITECACHE="internal"
+  WRITECACHE="none"
 fi


@@ -9775,31 +9761,6 @@ $as_echo "#define WRITECACHE_INTERNAL 1" >>confdefs.h
 *) as_fn_error $? "--with-writecache parameter invalid" "$LINENO" 5 ;;
 esac

-################################################################################
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to include integrity" >&5
-$as_echo_n "checking whether to include integrity... " >&6; }
-
-# Check whether --with-integrity was given.
-if test "${with_integrity+set}" = set; then :
-  withval=$with_integrity; INTEGRITY=$withval
-else
-  INTEGRITY="internal"
-fi
-
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $INTEGRITY" >&5
-$as_echo "$INTEGRITY" >&6; }
-
-case "$INTEGRITY" in
- none) ;;
- internal)
-
-$as_echo "#define INTEGRITY_INTERNAL 1" >>confdefs.h
-
-	;;
- *) as_fn_error $? "--with-integrity parameter invalid" "$LINENO" 5 ;;
-esac
-
 ################################################################################
 # Check whether --enable-readline was given.
 if test "${enable_readline+set}" = set; then :
@@ -9809,15 +9770,6 @@ else
 fi


-################################################################################
-# Check whether --enable-editline was given.
-if test "${enable_editline+set}" = set; then :
-  enableval=$enable_editline; EDITLINE=$enableval
-else
-  EDITLINE=no
-fi
-
-
 ################################################################################
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable realtime support" >&5
 $as_echo_n "checking whether to enable realtime support... " >&6; }
@@ -11845,7 +11797,6 @@ if test "$BUILD_LVMDBUSD" = yes; then



-
        if test -n "$PYTHON"; then
      # If the user set $PYTHON, use it and don't search something else.
      { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether $PYTHON version is >= 3" >&5
@@ -11881,7 +11832,7 @@ if ${am_cv_pathless_PYTHON+:} false; then :
  $as_echo_n "(cached) " >&6
 else

-	for am_cv_pathless_PYTHON in  python3 python2 python 	python3.9 python3.8 python3.7 python3.6 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 	python2.7 python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python2.0  none; do
+	for am_cv_pathless_PYTHON in python python2 python3 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 python2.7  python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python2.0 none; do
 	  test "$am_cv_pathless_PYTHON" = none && break
 	  prog="import sys
 # split strings by '.' and convert to numeric.  Append some zeros
@@ -12710,61 +12661,6 @@ fi

 fi

-################################################################################
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for BLKZEROOUT in sys/ioctl.h." >&5
-$as_echo_n "checking for BLKZEROOUT in sys/ioctl.h.... " >&6; }
-if ${ac_cv_have_blkzeroout+:} false; then :
-  $as_echo_n "(cached) " >&6
-else
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
-/* end confdefs.h.  */
-#include <sys/ioctl.h>
-#include <linux/fs.h>
-int bar(void) { return ioctl(0, BLKZEROOUT, 0); }
-
-int
-main ()
-{
-
-  ;
-  return 0;
-}
-_ACEOF
-if ac_fn_c_try_compile "$LINENO"; then :
-  ac_cv_have_blkzeroout=yes
-else
-  ac_cv_have_blkzeroout=no
-fi
-rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_have_blkzeroout" >&5
-$as_echo "$ac_cv_have_blkzeroout" >&6; }
-
-
-# Check whether --enable-blkzeroout was given.
-if test "${enable_blkzeroout+set}" = set; then :
-  enableval=$enable_blkzeroout; BLKZEROOUT=$enableval
-else
-  BLKZEROOUT=yes
-fi
-
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to use BLKZEROOUT for device zeroing" >&5
-$as_echo_n "checking whether to use BLKZEROOUT for device zeroing... " >&6; }
-if test "$BLKZEROOUT" = yes; then
-	if test $ac_cv_have_blkzeroout = yes; then :
-
-$as_echo "#define HAVE_BLKZEROOUT 1" >>confdefs.h
-
-else
-  BLKZEROOUT=no
-fi
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $BLKZEROOUT" >&5
-$as_echo "$BLKZEROOUT" >&6; }
-
-
 ################################################################################
 RT_LIBS=
 HAVE_REALTIME=no
@@ -12885,86 +12781,6 @@ fi
 done


-################################################################################
-if test "$EDITLINE" == yes; then
-
-pkg_failed=no
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for EDITLINE" >&5
-$as_echo_n "checking for EDITLINE... " >&6; }
-
-if test -n "$EDITLINE_CFLAGS"; then
-    pkg_cv_EDITLINE_CFLAGS="$EDITLINE_CFLAGS"
- elif test -n "$PKG_CONFIG"; then
-    if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libedit\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "libedit") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; then
-  pkg_cv_EDITLINE_CFLAGS=`$PKG_CONFIG --cflags "libedit" 2>/dev/null`
-		      test "x$?" != "x0" && pkg_failed=yes
-else
-  pkg_failed=yes
-fi
- else
-    pkg_failed=untried
-fi
-if test -n "$EDITLINE_LIBS"; then
-    pkg_cv_EDITLINE_LIBS="$EDITLINE_LIBS"
- elif test -n "$PKG_CONFIG"; then
-    if test -n "$PKG_CONFIG" && \
-    { { $as_echo "$as_me:${as_lineno-$LINENO}: \$PKG_CONFIG --exists --print-errors \"libedit\""; } >&5
-  ($PKG_CONFIG --exists --print-errors "libedit") 2>&5
-  ac_status=$?
-  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
-  test $ac_status = 0; }; then
-  pkg_cv_EDITLINE_LIBS=`$PKG_CONFIG --libs "libedit" 2>/dev/null`
-		      test "x$?" != "x0" && pkg_failed=yes
-else
-  pkg_failed=yes
-fi
- else
-    pkg_failed=untried
-fi
-
-
-
-if test $pkg_failed = yes; then
-   	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-
-if $PKG_CONFIG --atleast-pkgconfig-version 0.20; then
-        _pkg_short_errors_supported=yes
-else
-        _pkg_short_errors_supported=no
-fi
-        if test $_pkg_short_errors_supported = yes; then
-	        EDITLINE_PKG_ERRORS=`$PKG_CONFIG --short-errors --print-errors --cflags --libs "libedit" 2>&1`
-        else
-	        EDITLINE_PKG_ERRORS=`$PKG_CONFIG --print-errors --cflags --libs "libedit" 2>&1`
-        fi
-	# Put the nasty error message in config.log where it belongs
-	echo "$EDITLINE_PKG_ERRORS" >&5
-
-	as_fn_error $? "libedit could not be found which is required for the --enable-readline option." "$LINENO" 5
-
-elif test $pkg_failed = untried; then
-     	{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
-$as_echo "no" >&6; }
-	as_fn_error $? "libedit could not be found which is required for the --enable-readline option." "$LINENO" 5
-
-else
-	EDITLINE_CFLAGS=$pkg_cv_EDITLINE_CFLAGS
-	EDITLINE_LIBS=$pkg_cv_EDITLINE_LIBS
-        { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-$as_echo "yes" >&6; }
-
-
-$as_echo "#define EDITLINE_SUPPORT 1" >>confdefs.h
-
-fi
-fi
-
 ################################################################################
 if test "$READLINE" != no; then
 	lvm_saved_libs=$LIBS
@@ -13403,28 +13219,6 @@ $as_echo_n "checking whether to enable readline... " >&6; }
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $READLINE" >&5
 $as_echo "$READLINE" >&6; }

-if test "$EDITLINE" = yes; then
-	for ac_header in editline/readline.h editline/history.h
-do :
-  as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
-ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
-if eval test \"x\$"$as_ac_Header"\" = x"yes"; then :
-  cat >>confdefs.h <<_ACEOF
-#define `$as_echo "HAVE_$ac_header" | $as_tr_cpp` 1
-_ACEOF
-
-else
-  hard_bailout
-fi
-
-done
-
-fi
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to enable editline" >&5
-$as_echo_n "checking whether to enable editline... " >&6; }
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $EDITLINE" >&5
-$as_echo "$EDITLINE" >&6; }
-
 if test "$BUILD_CMIRRORD" = yes; then
 	for ac_func in atexit
 do :
@@ -14106,7 +13900,6 @@ _ACEOF



-


 ################################################################################
@@ -15479,8 +15272,8 @@ $as_echo "$as_me: WARNING: You should install latest cache_check vsn 0.7.0 to us
 fi

 if test -n "$VDO_CONFIGURE_WARN"; then :
-  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: Unrecognized 'vdoformat' tool is REQUIRED for VDO logical volume creation!" >&5
-$as_echo "$as_me: WARNING: Unrecognized 'vdoformat' tool is REQUIRED for VDO logical volume creation!" >&2;}
+  { $as_echo "$as_me:${as_lineno-$LINENO}: WARNING: unrecognized 'vdoformat' tool is REQUIRED for VDO logical volume creation!" >&5
+$as_echo "$as_me: WARNING: unrecognized 'vdoformat' tool is REQUIRED for VDO logical volume creation!" >&2;}
 fi


--- a/configure.ac
+++ b/configure.ac
@@ -607,7 +607,7 @@ AC_MSG_CHECKING(whether to include vdo)
 AC_ARG_WITH(vdo,
 	    AC_HELP_STRING([--with-vdo=TYPE],
 			   [vdo support: internal/none [internal]]),
-			   VDO=$withval, VDO="internal")
+			   VDO=$withval, VDO="none")

 AC_MSG_RESULT($VDO)

@@ -654,8 +654,8 @@ dnl -- writecache inclusion type
 AC_MSG_CHECKING(whether to include writecache)
 AC_ARG_WITH(writecache,
 	    AC_HELP_STRING([--with-writecache=TYPE],
-			   [writecache support: internal/none [internal]]),
-			   WRITECACHE=$withval, WRITECACHE="internal")
+			   [writecache support: internal/none [none]]),
+			   WRITECACHE=$withval, WRITECACHE="none")

 AC_MSG_RESULT($WRITECACHE)

@@ -667,36 +667,12 @@ case "$WRITECACHE" in
 *) AC_MSG_ERROR([--with-writecache parameter invalid]) ;;
 esac

-################################################################################
-dnl -- integrity inclusion type
-AC_MSG_CHECKING(whether to include integrity)
-AC_ARG_WITH(integrity,
-	    AC_HELP_STRING([--with-integrity=TYPE],
-			   [integrity support: internal/none [internal]]),
-			   INTEGRITY=$withval, INTEGRITY="internal")
-
-AC_MSG_RESULT($INTEGRITY)
-
-case "$INTEGRITY" in
- none) ;;
- internal)
-	AC_DEFINE([INTEGRITY_INTERNAL], 1, [Define to 1 to include built-in support for integrity.])
-	;;
- *) AC_MSG_ERROR([--with-integrity parameter invalid]) ;;
-esac
-
 ################################################################################
 dnl -- Disable readline
 AC_ARG_ENABLE([readline],
 	      AC_HELP_STRING([--disable-readline], [disable readline support]),
 	      READLINE=$enableval, READLINE=maybe)

-################################################################################
-dnl -- Disable editline
-AC_ARG_ENABLE([editline],
-	      AC_HELP_STRING([--enable-editline], [enable editline support]),
-	      EDITLINE=$enableval, EDITLINE=no)
-
 ################################################################################
 dnl -- Disable realtime clock support
 AC_MSG_CHECKING(whether to enable realtime support)
@@ -740,7 +716,7 @@ dnl -- Set up pidfile and run directory
 AH_TEMPLATE(DEFAULT_PID_DIR)
 AC_ARG_WITH(default-pid-dir,
 	    AC_HELP_STRING([--with-default-pid-dir=PID_DIR],
-			   [default directory to keep PID files in [autodetect]]),
+			   [Default directory to keep PID files in. [autodetect]]),
 	    DEFAULT_PID_DIR="$withval", DEFAULT_PID_DIR=$RUN_DIR)
 AC_DEFINE_UNQUOTED(DEFAULT_PID_DIR, ["$DEFAULT_PID_DIR"],
 		   [Default directory to keep PID files in.])
@@ -748,7 +724,7 @@ AC_DEFINE_UNQUOTED(DEFAULT_PID_DIR, ["$DEFAULT_PID_DIR"],
 AH_TEMPLATE(DEFAULT_DM_RUN_DIR, [Name of default DM run directory.])
 AC_ARG_WITH(default-dm-run-dir,
 	    AC_HELP_STRING([--with-default-dm-run-dir=DM_RUN_DIR],
-			   [default DM run directory [autodetect]]),
+			   [ Default DM run directory. [autodetect]]),
 	    DEFAULT_DM_RUN_DIR="$withval", DEFAULT_DM_RUN_DIR=$RUN_DIR)
 AC_DEFINE_UNQUOTED(DEFAULT_DM_RUN_DIR, ["$DEFAULT_DM_RUN_DIR"],
 		   [Default DM run directory.])
@@ -756,7 +732,7 @@ AC_DEFINE_UNQUOTED(DEFAULT_DM_RUN_DIR, ["$DEFAULT_DM_RUN_DIR"],
 AH_TEMPLATE(DEFAULT_RUN_DIR, [Name of default LVM run directory.])
 AC_ARG_WITH(default-run-dir,
 	    AC_HELP_STRING([--with-default-run-dir=RUN_DIR],
-			   [default LVM run directory [autodetect_run_dir/lvm]]),
+			   [Default LVM run directory. [autodetect_run_dir/lvm]]),
 	    DEFAULT_RUN_DIR="$withval", DEFAULT_RUN_DIR="$RUN_DIR/lvm")
 AC_DEFINE_UNQUOTED(DEFAULT_RUN_DIR, ["$DEFAULT_RUN_DIR"],
 		   [Default LVM run directory.])
@@ -1224,9 +1200,6 @@ if test "$BUILD_LVMDBUSD" = yes; then
 	unset am_cv_pathless_PYTHON ac_cv_path_PYTHON am_cv_python_platform
 	unset am_cv_python_pythondir am_cv_python_version am_cv_python_pyexecdir
 	unset ac_cv_path_PYTHON_CONFIG ac_cv_path_ac_pt_PYTHON_CONFIG
-	m4_define_default([_AM_PYTHON_INTERPRETER_LIST],[ python3 python2 python dnl
-	python3.9 python3.8 python3.7 python3.6 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 dnl
-	python2.7 python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python2.0 ])
 	AM_PATH_PYTHON([3])
 	PYTHON3=$PYTHON
 	test -z "$PYTHON3" && AC_MSG_ERROR([python3 is required for --enable-python3_bindings or --enable-dbus-service but cannot be found])
@@ -1354,33 +1327,6 @@ if test "$SELINUX" = yes; then
 		HAVE_SELINUX=no ])
 fi

-################################################################################
-dnl -- Check BLKZEROOUT support
-
-AC_CACHE_CHECK([for BLKZEROOUT in sys/ioctl.h.],
-	[ac_cv_have_blkzeroout],
-	[AC_COMPILE_IFELSE([AC_LANG_PROGRAM(
-[#include <sys/ioctl.h>
-#include <linux/fs.h>
-int bar(void) { return ioctl(0, BLKZEROOUT, 0); }]
-	 )], [ac_cv_have_blkzeroout=yes], [ac_cv_have_blkzeroout=no])])
-
-
-AC_ARG_ENABLE(blkzeroout,
-	      AC_HELP_STRING([--disable-blkzeroout],
-			     [do not use BLKZEROOUT for device zeroing]),
-	      BLKZEROOUT=$enableval, BLKZEROOUT=yes)
-
-AC_MSG_CHECKING(whether to use BLKZEROOUT for device zeroing)
-if test "$BLKZEROOUT" = yes; then
-	AC_IF_YES(ac_cv_have_blkzeroout,
-		  AC_DEFINE(HAVE_BLKZEROOUT, 1,
-			    [Define if ioctl BLKZEROOUT can be used for device zeroing.]),
-		  BLKZEROOUT=no)
-fi
-AC_MSG_RESULT($BLKZEROOUT)
-
-
 ################################################################################
 dnl -- Check for realtime clock support
 RT_LIBS=
@@ -1414,16 +1360,6 @@ AC_IF_YES(ac_cv_stat_st_ctim,
 dnl -- Check for getopt
 AC_CHECK_HEADERS(getopt.h, AC_DEFINE([HAVE_GETOPTLONG], 1, [Define to 1 if getopt_long is available.]))

-################################################################################
-dnl -- Check for editline
-if test "$EDITLINE" == yes; then
-	PKG_CHECK_MODULES([EDITLINE], [libedit], [
-		AC_DEFINE([EDITLINE_SUPPORT], 1,
-			[Define to 1 to include the LVM editline shell.])], AC_MSG_ERROR(
-[libedit could not be found which is required for the --enable-readline option.])
-	)
-fi
-
 ################################################################################
 dnl -- Check for readline (Shamelessly copied from parted 1.4.17)
 if test "$READLINE" != no; then
@@ -1556,12 +1492,6 @@ fi
 AC_MSG_CHECKING(whether to enable readline)
 AC_MSG_RESULT($READLINE)

-if test "$EDITLINE" = yes; then
-	AC_CHECK_HEADERS(editline/readline.h editline/history.h,,hard_bailout)
-fi
-AC_MSG_CHECKING(whether to enable editline)
-AC_MSG_RESULT($EDITLINE)
-
 if test "$BUILD_CMIRRORD" = yes; then
 	AC_CHECK_FUNCS(atexit,,hard_bailout)
 fi
@@ -1817,7 +1747,6 @@ AC_SUBST(QUORUM_CFLAGS)
 AC_SUBST(QUORUM_LIBS)
 AC_SUBST(RT_LIBS)
 AC_SUBST(READLINE_LIBS)
-AC_SUBST(EDITLINE_LIBS)
 AC_SUBST(REPLICATORS)
 AC_SUBST(SACKPT_CFLAGS)
 AC_SUBST(SACKPT_LIBS)
@@ -1953,7 +1882,7 @@ AS_IF([test -n "$CACHE_CHECK_VERSION_WARN"],
      [AC_MSG_WARN([You should install latest cache_check vsn 0.7.0 to use lvm2 cache metadata format 2])])

 AS_IF([test -n "$VDO_CONFIGURE_WARN"],
-      [AC_MSG_WARN([Unrecognized 'vdoformat' tool is REQUIRED for VDO logical volume creation!])])
+      [AC_MSG_WARN([unrecognized 'vdoformat' tool is REQUIRED for VDO logical volume creation!])])


 AS_IF([test "$ODIRECT" != yes],
--- a/coverity/coverity_model.c
+++ b/coverity/coverity_model.c
@@ -46,7 +46,6 @@ const char *find_config_tree_str(struct cmd_context *cmd, int id, struct profile
 	return "STRING";
 }

-/*
 struct logical_volume *origin_from_cow(const struct logical_volume *lv)
 {
 	if (lv)
@@ -54,7 +53,6 @@ struct logical_volume *origin_from_cow(const struct logical_volume *lv)

 	__coverity_panic__();
 }
-*/

 /* simple_memccpy() from glibc */
 void *memccpy(void *dest, const void *src, int c, size_t n)
--- a/daemons/cmirrord/cluster.h
+++ b/daemons/cmirrord/cluster.h
@@ -12,8 +12,8 @@
 #ifndef _LVM_CLOG_CLUSTER_H
 #define _LVM_CLOG_CLUSTER_H

-#include "libdm/libdevmapper.h"
 #include "libdm/misc/dm-log-userspace.h"
+#include "libdm/libdevmapper.h"

 #define DM_ULOG_RESPONSE 0x1000U /* in last byte of 32-bit value */
 #define DM_ULOG_CHECKPOINT_READY 21
--- a/daemons/cmirrord/functions.h
+++ b/daemons/cmirrord/functions.h
@@ -12,8 +12,7 @@
 #ifndef _LVM_CLOG_FUNCTIONS_H
 #define _LVM_CLOG_FUNCTIONS_H

-#include "libdm/libdevmapper.h"
-#include "libdm/misc/dm-log-userspace.h"
+#include "device_mapper/misc/dm-log-userspace.h"
 #include "cluster.h"

 #define LOG_RESUMED   1
--- a/daemons/dmeventd/dmeventd.c
+++ b/daemons/dmeventd/dmeventd.c
@@ -752,7 +752,7 @@ static void _exit_timeout(void *unused __attribute__((unused)))
 static void *_timeout_thread(void *unused __attribute__((unused)))
 {
 	struct thread_status *thread;
-	struct timespec timeout, real_time;
+	struct timespec timeout;
 	time_t curr_time;
 	int ret;

@@ -763,16 +763,7 @@ static void *_timeout_thread(void *unused __attribute__((unused)))
 	while (!dm_list_empty(&_timeout_registry)) {
 		timeout.tv_sec = 0;
 		timeout.tv_nsec = 0;
-#ifndef HAVE_REALTIME
 		curr_time = time(NULL);
-#else
-		if (clock_gettime(CLOCK_REALTIME, &real_time)) {
-			log_error("Failed to read clock_gettime().");
-			break;
-		}
-		/* 10ms back to the future */
-		curr_time = real_time.tv_sec + ((real_time.tv_nsec > (1000000000 - 10000000)) ? 1 : 0);
-#endif

 		dm_list_iterate_items_gen(thread, &_timeout_registry, timeout_list) {
 			if (thread->next_time <= curr_time) {
@@ -1494,34 +1485,37 @@ static int _client_read(struct dm_event_fifos *fifos,
 		t.tv_usec = 0;
 		ret = select(fifos->client + 1, &fds, NULL, NULL, &t);

-		if (!ret && bytes)
-			continue; /* trying to finish read */
+		if (!ret && !bytes)	/* nothing to read */
+			return 0;

-		if (ret <= 0)	/* nothing to read */
-			goto bad;
+		if (!ret)	/* trying to finish read */
+			continue;
+
+		if (ret < 0)	/* error */
+			return 0;

 		ret = read(fifos->client, buf + bytes, size - bytes);
 		bytes += ret > 0 ? ret : 0;
-		if (!msg->data && (bytes == 2 * sizeof(uint32_t))) {
+		if (header && (bytes == 2 * sizeof(uint32_t))) {
 			msg->cmd = ntohl(header[0]);
+			size = msg->size = ntohl(header[1]);
 			bytes = 0;
-
-			if (!(size = msg->size = ntohl(header[1])))
-				break;
-
-			if (!(buf = msg->data = malloc(msg->size)))
-				goto bad;
+			if (!size)
+				break; /* No data -> error */
+			buf = msg->data = malloc(msg->size);
+			if (!buf)
+				break; /* No mem -> error */
+			header = 0;
 		}
 	}

-	if (bytes == size)
-		return 1;
+	if (bytes != size) {
+		free(msg->data);
+		msg->data = NULL;
+		return 0;
+	}

-bad:
-	free(msg->data);
-	msg->data = NULL;
-
-	return 0;
+	return 1;
 }

 /*
@@ -1751,8 +1745,7 @@ static void _init_thread_signals(void)
 	sigdelset(&my_sigset, SIGHUP);
 	sigdelset(&my_sigset, SIGQUIT);

-	if (pthread_sigmask(SIG_BLOCK, &my_sigset, NULL))
-		log_sys_error("pthread_sigmask", "SIG_BLOCK");
+	pthread_sigmask(SIG_BLOCK, &my_sigset, NULL);
 }

 /*
@@ -2028,8 +2021,8 @@ static int _reinstate_registrations(struct dm_event_fifos *fifos)
 static void _restart_dmeventd(void)
 {
 	struct dm_event_fifos fifos = {
-		.client = -1,
 		.server = -1,
+		.client = -1,
 		/* FIXME Make these either configurable or depend directly on dmeventd_path */
 		.client_path = DM_EVENT_FIFO_CLIENT,
 		.server_path = DM_EVENT_FIFO_SERVER
@@ -2243,8 +2236,7 @@ int main(int argc, char *argv[])

 	_init_thread_signals();

-	if (pthread_mutex_init(&_global_mutex, NULL))
-		exit(EXIT_FAILURE);
+	pthread_mutex_init(&_global_mutex, NULL);

 	if (!_systemd_activation && !_open_fifos(&fifos))
 		exit(EXIT_FIFO_FAILURE);
--- a/daemons/dmeventd/libdevmapper-event.c
+++ b/daemons/dmeventd/libdevmapper-event.c
@@ -237,16 +237,16 @@ static int _daemon_read(struct dm_event_fifos *fifos,
 			ret = select(fifos->server + 1, &fds, NULL, NULL, &tval);
 			if (ret < 0 && errno != EINTR) {
 				log_error("Unable to read from event server.");
-				goto bad;
+				return 0;
 			}
 			if ((ret == 0) && (i > 4) && !bytes) {
 				log_error("No input from event server.");
-				goto bad;
+				return 0;
 			}
 		}
 		if (ret < 1) {
 			log_error("Unable to read from event server.");
-			goto bad;
+			return 0;
 		}

 		ret = read(fifos->server, buf + bytes, size);
@@ -255,32 +255,25 @@ static int _daemon_read(struct dm_event_fifos *fifos,
 				continue;

 			log_error("Unable to read from event server.");
-			goto bad;
+			return 0;
 		}

 		bytes += ret;
-		if (!msg->data && (bytes == 2 * sizeof(uint32_t))) {
+		if (header && (bytes == 2 * sizeof(uint32_t))) {
 			msg->cmd = ntohl(header[0]);
+			msg->size = ntohl(header[1]);
+			buf = msg->data = malloc(msg->size);
+			size = msg->size;
 			bytes = 0;
-
-			if (!(size = msg->size = ntohl(header[1])))
-				break;
-
-			if (!(buf = msg->data = malloc(msg->size))) {
-				log_error("Unable to allocate message data.");
-				return 0;
-			}
+			header = 0;
 		}
 	}

-	if (bytes == size)
-		return 1;
-
-bad:
-	free(msg->data);
-	msg->data = NULL;
-
-	return 0;
+	if (bytes != size) {
+		free(msg->data);
+		msg->data = NULL;
+	}
+	return bytes == size;
 }

 /* Write message to daemon. */
@@ -615,8 +608,8 @@ static int _do_event(int cmd, char *dmeventd_path, struct dm_event_daemon_messag
 {
 	int ret;
 	struct dm_event_fifos fifos = {
-		.client = -1,
 		.server = -1,
+		.client = -1,
 		/* FIXME Make these either configurable or depend directly on dmeventd_path */
 		.client_path = DM_EVENT_FIFO_CLIENT,
 		.server_path = DM_EVENT_FIFO_SERVER
--- a/daemons/dmeventd/plugins/lvm2/dmeventd_lvm.c
+++ b/daemons/dmeventd/plugins/lvm2/dmeventd_lvm.c
@@ -71,7 +71,7 @@ int dmeventd_lvm2_init(void)
 	if (!_lvm_handle) {
 		lvm2_log_fn(_lvm2_print_log);

-		if (!(_lvm_handle = lvm2_init_threaded()))
+		if (!(_lvm_handle = lvm2_init()))
 			goto out;

 		/*
--- a/daemons/dmeventd/plugins/raid/dmeventd_raid.c
+++ b/daemons/dmeventd/plugins/raid/dmeventd_raid.c
@@ -82,13 +82,6 @@ static int _process_raid_event(struct dso_state *state, char *params, const char
 		 * We presume lvconvert to do pre-repair
 		 * checks to avoid bloat in this plugin.
 		 */
-		if (!state->warned && status->insync_regions < status->total_regions) {
-			state->warned = 1;
-			log_warn("WARNING: waiting for resynchronization to finish "
-				 "before initiating repair on RAID device %s.", device);
-			/* Fall through to allow lvconvert to run. */
-		}
-
 		if (state->failed)
 			goto out; /* already reported */

--- a/daemons/dmeventd/plugins/vdo/dmeventd_vdo.c
+++ b/daemons/dmeventd/plugins/vdo/dmeventd_vdo.c
@@ -16,12 +16,7 @@
 #include "daemons/dmeventd/plugins/lvm2/dmeventd_lvm.h"
 #include "daemons/dmeventd/libdevmapper-event.h"

-/*
- * Use parser from new device_mapper library.
- * Although during compilation we can see dm_vdo_status_parse()
- * in runtime we are linked agains systems libdm 'older' library
- * which does not provide this symbol and plugin fails to load
- */
+/* Use parser from new device_mapper library */
 #include "device_mapper/vdo/status.c"

 #include <sys/wait.h>
--- a/daemons/lvmdbusd/cfg.py
+++ b/daemons/lvmdbusd/cfg.py
@@ -47,11 +47,9 @@ BUS_NAME = os.getenv('LVM_DBUS_NAME', 'com.redhat.lvmdbus1')
 BASE_INTERFACE = 'com.redhat.lvmdbus1'
 PV_INTERFACE = BASE_INTERFACE + '.Pv'
 VG_INTERFACE = BASE_INTERFACE + '.Vg'
-VG_VDO_INTERFACE = BASE_INTERFACE + '.VgVdo'
 LV_INTERFACE = BASE_INTERFACE + '.Lv'
 LV_COMMON_INTERFACE = BASE_INTERFACE + '.LvCommon'
 THIN_POOL_INTERFACE = BASE_INTERFACE + '.ThinPool'
-VDO_POOL_INTERFACE = BASE_INTERFACE + '.VdoPool'
 CACHE_POOL_INTERFACE = BASE_INTERFACE + '.CachePool'
 LV_CACHED = BASE_INTERFACE + '.CachedLv'
 SNAPSHOT_INTERFACE = BASE_INTERFACE + '.Snapshot'
@@ -63,7 +61,6 @@ PV_OBJ_PATH = BASE_OBJ_PATH + '/Pv'
 VG_OBJ_PATH = BASE_OBJ_PATH + '/Vg'
 LV_OBJ_PATH = BASE_OBJ_PATH + '/Lv'
 THIN_POOL_PATH = BASE_OBJ_PATH + "/ThinPool"
-VDO_POOL_PATH = BASE_OBJ_PATH + "/VdoPool"
 CACHE_POOL_PATH = BASE_OBJ_PATH + "/CachePool"
 HIDDEN_LV_PATH = BASE_OBJ_PATH + "/HiddenLv"
 MANAGER_OBJ_PATH = BASE_OBJ_PATH + '/Manager'
@@ -74,7 +71,6 @@ pv_id = itertools.count()
 vg_id = itertools.count()
 lv_id = itertools.count()
 thin_id = itertools.count()
-vdo_id = itertools.count()
 cache_pool_id = itertools.count()
 job_id = itertools.count()
 hidden_lv = itertools.count()
@@ -83,9 +79,6 @@ hidden_lv = itertools.count()
 load = None
 event = None

-# Boolean to denote if lvm supports VDO integration
-vdo_support = False
-
 # Global cached state
 db = None

--- a/daemons/lvmdbusd/cmdhandler.py
+++ b/daemons/lvmdbusd/cmdhandler.py
@@ -388,24 +388,6 @@ def vg_create_thin_pool(md_full_name, data_full_name, create_options):
 	return call(cmd)


-def vg_create_vdo_pool_lv_and_lv(vg_name, pool_name, lv_name, data_size,
-									virtual_size, create_options):
-	cmd = ['lvcreate']
-	cmd.extend(options_to_cli_args(create_options))
-	cmd.extend(['-y', '--type', 'vdo', '-n', lv_name,
-				'-L', '%dB' % data_size, '-V', '%dB' % virtual_size,
-				"%s/%s" % (vg_name, pool_name)])
-	return call(cmd)
-
-
-def vg_create_vdo_pool(pool_full_name, lv_name, virtual_size, create_options):
-	cmd = ['lvconvert']
-	cmd.extend(options_to_cli_args(create_options))
-	cmd.extend(['--type', 'vdo-pool', '-n', lv_name, '--force', '-y',
-				'-V', '%dB' % virtual_size, pool_full_name])
-	return call(cmd)
-
-
 def lv_remove(lv_path, remove_options):
 	cmd = ['lvremove']
 	cmd.extend(options_to_cli_args(remove_options))
@@ -453,15 +435,6 @@ def lv_cache_lv(cache_pool_full_name, lv_full_name, cache_options):
 	return call(cmd)


-def lv_writecache_lv(cache_lv_full_name, lv_full_name, cache_options):
-	# lvconvert --type writecache --cachevol VG/CacheLV VG/OriginLV
-	cmd = ['lvconvert']
-	cmd.extend(options_to_cli_args(cache_options))
-	cmd.extend(['-y', '--type', 'writecache', '--cachevol',
-				cache_lv_full_name, lv_full_name])
-	return call(cmd)
-
-
 def lv_detach_cache(lv_full_name, detach_options, destroy_cache):
 	cmd = ['lvconvert']
 	if destroy_cache:
@@ -477,28 +450,6 @@ def lv_detach_cache(lv_full_name, detach_options, destroy_cache):
 	return call(cmd)


-def lv_vdo_compression(lv_path, enable, comp_options):
-	cmd = ['lvchange', '--compression']
-	if enable:
-		cmd.append('y')
-	else:
-		cmd.append('n')
-	cmd.extend(options_to_cli_args(comp_options))
-	cmd.append(lv_path)
-	return call(cmd)
-
-
-def lv_vdo_deduplication(lv_path, enable, dedup_options):
-	cmd = ['lvchange', '--deduplication']
-	if enable:
-		cmd.append('y')
-	else:
-		cmd.append('n')
-	cmd.extend(options_to_cli_args(dedup_options))
-	cmd.append(lv_path)
-	return call(cmd)
-
-
 def supports_json():
 	cmd = ['help']
 	rc, out, err = call(cmd)
@@ -511,16 +462,6 @@ def supports_json():
 	return False


-def supports_vdo():
-	cmd = ['segtypes']
-	rc, out, err = call(cmd)
-	if rc == 0:
-		if "vdo" in out:
-			log_debug("We have VDO support")
-			return True
-	return False
-
-
 def lvm_full_report_json():
 	pv_columns = ['pv_name', 'pv_uuid', 'pv_fmt', 'pv_size', 'pv_free',
 					'pv_used', 'dev_size', 'pv_mda_size', 'pv_mda_free',
@@ -548,22 +489,6 @@ def lvm_full_report_json():

 	lv_seg_columns = ['seg_pe_ranges', 'segtype', 'lv_uuid']

-	if cfg.vdo_support:
-		lv_columns.extend(
-			['vdo_operating_mode', 'vdo_compression_state', 'vdo_index_state',
-				'vdo_used_size', 'vdo_saving_percent']
-		)
-
-		lv_seg_columns.extend(
-			['vdo_compression', 'vdo_deduplication',
-				'vdo_use_metadata_hints', 'vdo_minimum_io_size',
-				'vdo_block_map_cache_size', 'vdo_block_map_era_length',
-				'vdo_use_sparse_index', 'vdo_index_memory_size',
-				'vdo_slab_size', 'vdo_ack_threads', 'vdo_bio_threads',
-				'vdo_bio_rotation', 'vdo_cpu_threads', 'vdo_hash_zone_threads',
-				'vdo_logical_threads', 'vdo_physical_threads',
-				'vdo_max_discard', 'vdo_write_policy', 'vdo_header_size'])
-
 	cmd = _dc('fullreport', [
 		'-a',		# Need hidden too
 		'--configreport', 'pv', '-o', ','.join(pv_columns),
@@ -777,7 +702,6 @@ def activate_deactivate(op, name, activate, control_flags, options):
 		op += 'n'

 	cmd.append(op)
-	cmd.append("-y")
 	cmd.append(name)
 	return call(cmd)

--- a/daemons/lvmdbusd/fetch.py
+++ b/daemons/lvmdbusd/fetch.py
@@ -29,26 +29,11 @@ def _main_thread_load(refresh=True, emit_signal=True):
 		refresh=refresh,
 		emit_signal=emit_signal,
 		cache_refresh=False)[1]
-
-	lv_changes = load_lvs(
+	num_total_changes += load_lvs(
 		refresh=refresh,
 		emit_signal=emit_signal,
 		cache_refresh=False)[1]

-	num_total_changes += lv_changes
-
-	# When the LVs change it can cause another change in the VGs which is
-	# missed if we don't scan through the VGs again.  We could achieve this
-	# the other way and re-scan the LVs, but in general there are more LVs than
-	# VGs, thus this should be more efficient.  This happens when a LV interface
-	# changes causing the dbus object representing it to be removed and
-	# recreated.
-	if refresh and lv_changes > 0:
-		num_total_changes += load_vgs(
-			refresh=refresh,
-			emit_signal=emit_signal,
-			cache_refresh=False)[1]
-
 	return num_total_changes


--- a/daemons/lvmdbusd/lv.py
+++ b/daemons/lvmdbusd/lv.py
@@ -10,14 +10,14 @@
 from .automatedproperties import AutomatedProperties

 from . import utils
-from .utils import vg_obj_path_generate, log_error, _handle_execute
+from .utils import vg_obj_path_generate, log_error
 import dbus
 from . import cmdhandler
 from . import cfg
 from .cfg import LV_INTERFACE, THIN_POOL_INTERFACE, SNAPSHOT_INTERFACE, \
-	LV_COMMON_INTERFACE, CACHE_POOL_INTERFACE, LV_CACHED, VDO_POOL_INTERFACE
+	LV_COMMON_INTERFACE, CACHE_POOL_INTERFACE, LV_CACHED
 from .request import RequestEntry
-from .utils import n, n32, d
+from .utils import n, n32
 from .loader import common
 from .state import State
 from . import background
@@ -74,66 +74,23 @@ def lvs_state_retrieve(selection, cache_refresh=True):
 	lvs = sorted(cfg.db.fetch_lvs(selection), key=get_key)

 	for l in lvs:
-		if cfg.vdo_support:
-			rc.append(LvStateVdo(
-				l['lv_uuid'], l['lv_name'],
-				l['lv_path'], n(l['lv_size']),
-				l['vg_name'],
-				l['vg_uuid'], l['pool_lv_uuid'],
-				l['pool_lv'], l['origin_uuid'], l['origin'],
-				n32(l['data_percent']), l['lv_attr'],
-				l['lv_tags'], l['lv_active'], l['data_lv'],
-				l['metadata_lv'], l['segtype'], l['lv_role'],
-				l['lv_layout'],
-				n32(l['snap_percent']),
-				n32(l['metadata_percent']),
-				n32(l['copy_percent']),
-				n32(l['sync_percent']),
-				n(l['lv_metadata_size']),
-				l['move_pv'],
-				l['move_pv_uuid'],
-				l['vdo_operating_mode'],
-				l['vdo_compression_state'],
-				l['vdo_index_state'],
-				n(l['vdo_used_size']),
-				d(l['vdo_saving_percent']),
-				l['vdo_compression'],
-				l['vdo_deduplication'],
-				l['vdo_use_metadata_hints'],
-				n32(l['vdo_minimum_io_size']),
-				n(l['vdo_block_map_cache_size']),
-				n32(l['vdo_block_map_era_length']),
-				l['vdo_use_sparse_index'],
-				n(l['vdo_index_memory_size']),
-				n(l['vdo_slab_size']),
-				n32(l['vdo_ack_threads']),
-				n32(l['vdo_bio_threads']),
-				n32(l['vdo_bio_rotation']),
-				n32(l['vdo_cpu_threads']),
-				n32(l['vdo_hash_zone_threads']),
-				n32(l['vdo_logical_threads']),
-				n32(l['vdo_physical_threads']),
-				n32(l['vdo_max_discard']),
-				l['vdo_write_policy'],
-				n32(l['vdo_header_size'])))
-		else:
-			rc.append(LvState(
-				l['lv_uuid'], l['lv_name'],
-				l['lv_path'], n(l['lv_size']),
-				l['vg_name'],
-				l['vg_uuid'], l['pool_lv_uuid'],
-				l['pool_lv'], l['origin_uuid'], l['origin'],
-				n32(l['data_percent']), l['lv_attr'],
-				l['lv_tags'], l['lv_active'], l['data_lv'],
-				l['metadata_lv'], l['segtype'], l['lv_role'],
-				l['lv_layout'],
-				n32(l['snap_percent']),
-				n32(l['metadata_percent']),
-				n32(l['copy_percent']),
-				n32(l['sync_percent']),
-				n(l['lv_metadata_size']),
-				l['move_pv'],
-				l['move_pv_uuid']))
+		rc.append(LvState(
+			l['lv_uuid'], l['lv_name'],
+			l['lv_path'], n(l['lv_size']),
+			l['vg_name'],
+			l['vg_uuid'], l['pool_lv_uuid'],
+			l['pool_lv'], l['origin_uuid'], l['origin'],
+			n32(l['data_percent']), l['lv_attr'],
+			l['lv_tags'], l['lv_active'], l['data_lv'],
+			l['metadata_lv'], l['segtype'], l['lv_role'],
+			l['lv_layout'],
+			n32(l['snap_percent']),
+			n32(l['metadata_percent']),
+			n32(l['copy_percent']),
+			n32(l['sync_percent']),
+			n(l['lv_metadata_size']),
+			l['move_pv'],
+			l['move_pv_uuid']))
 	return rc


@@ -237,8 +194,6 @@ class LvState(State):
 	def _object_type_create(self):
 		if self.Attr[0] == 't':
 			return LvThinPool
-		elif self.Attr[0] == 'd':
-			return LvVdoPool
 		elif self.Attr[0] == 'C':
 			if 'pool' in self.layout:
 				return LvCachePool
@@ -265,34 +220,6 @@ class LvState(State):
 		return (klass, path_method)


-class LvStateVdo(LvState):
-
-	def __init__(self, Uuid, Name, Path, SizeBytes,
-					vg_name, vg_uuid, pool_lv_uuid, PoolLv,
-					origin_uuid, OriginLv, DataPercent, Attr, Tags, active,
-					data_lv, metadata_lv, segtypes, role, layout, SnapPercent,
-					MetaDataPercent, CopyPercent, SyncPercent,
-					MetaDataSizeBytes, move_pv, move_pv_uuid,
-					vdo_operating_mode, vdo_compression_state, vdo_index_state,
-					vdo_used_size,vdo_saving_percent,vdo_compression,
-					vdo_deduplication,vdo_use_metadata_hints,
-					vdo_minimum_io_size,vdo_block_map_cache_size,
-					vdo_block_map_era_length,vdo_use_sparse_index,
-					vdo_index_memory_size,vdo_slab_size,vdo_ack_threads,
-					vdo_bio_threads,vdo_bio_rotation,vdo_cpu_threads,
-					vdo_hash_zone_threads,vdo_logical_threads,
-					vdo_physical_threads,vdo_max_discard,
-					vdo_write_policy,vdo_header_size):
-		super(LvStateVdo, self).__init__(Uuid, Name, Path, SizeBytes,
-					vg_name, vg_uuid, pool_lv_uuid, PoolLv,
-					origin_uuid, OriginLv, DataPercent, Attr, Tags, active,
-					data_lv, metadata_lv, segtypes, role, layout, SnapPercent,
-					MetaDataPercent, CopyPercent, SyncPercent,
-					MetaDataSizeBytes, move_pv, move_pv_uuid)
-
-		utils.init_class_from_arguments(self, "vdo_", snake_to_pascal=True)
-
-
 # noinspection PyPep8Naming
@utils.dbus_property(LV_COMMON_INTERFACE, 'Uuid', 's')
@utils.dbus_property(LV_COMMON_INTERFACE, 'Name', 's')
@@ -348,7 +275,13 @@ class LvCommon(AutomatedProperties):

 	@staticmethod
 	def handle_execute(rc, out, err):
-		_handle_execute(rc, out, err, LV_INTERFACE)
+		if rc == 0:
+			cfg.load()
+		else:
+			# Need to work on error handling, need consistent
+			raise dbus.exceptions.DBusException(
+				LV_INTERFACE,
+				'Exit code %s, stderr = %s' % (str(rc), err))

 	@staticmethod
 	def validate_dbus_object(lv_uuid, lv_name):
@@ -388,7 +321,6 @@ class LvCommon(AutomatedProperties):
 					'l': 'mirror log device', 'c': 'under conversion',
 					'V': 'thin Volume', 't': 'thin pool', 'T': 'Thin pool data',
 					'e': 'raid or pool metadata or pool metadata spare',
-					'd': 'vdo pool', 'D': 'vdo pool data', 'g': 'integrity',
 					'-': 'Unspecified'}
 		return self.attr_struct(0, type_map)

@@ -524,7 +456,8 @@ class Lv(LvCommon):
 		# Make sure we have a dbus object representing it
 		LvCommon.validate_dbus_object(lv_uuid, lv_name)
 		# Remove the LV, if successful then remove from the model
-		LvCommon.handle_execute(*cmdhandler.lv_remove(lv_name, remove_options))
+		rc, out, err = cmdhandler.lv_remove(lv_name, remove_options)
+		LvCommon.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -544,8 +477,9 @@ class Lv(LvCommon):
 		# Make sure we have a dbus object representing it
 		LvCommon.validate_dbus_object(lv_uuid, lv_name)
 		# Rename the logical volume
-		LvCommon.handle_execute(*cmdhandler.lv_rename(lv_name, new_name,
-												rename_options))
+		rc, out, err = cmdhandler.lv_rename(lv_name, new_name,
+											rename_options)
+		LvCommon.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -594,11 +528,13 @@ class Lv(LvCommon):
 				remainder = space % 512
 				optional_size = space + 512 - remainder

-		LvCommon.handle_execute(*cmdhandler.vg_lv_snapshot(
-			lv_name, snapshot_options,name, optional_size))
+		rc, out, err = cmdhandler.vg_lv_snapshot(
+			lv_name, snapshot_options, name, optional_size)
+		LvCommon.handle_execute(rc, out, err)
 		full_name = "%s/%s" % (dbo.vg_name_lookup(), name)
 		return cfg.om.get_object_path_by_lvm_id(full_name)

+
 	@dbus.service.method(
 		dbus_interface=LV_INTERFACE,
 		in_signature='stia{sv}',
@@ -634,8 +570,9 @@ class Lv(LvCommon):
 				pv_dests.append((pv_dbus_obj.lvm_id, pr[1], pr[2]))

 		size_change = new_size_bytes - dbo.SizeBytes
-		LvCommon.handle_execute(*cmdhandler.lv_resize(
-			dbo.lvm_id, size_change,pv_dests, resize_options))
+		rc, out, err = cmdhandler.lv_resize(dbo.lvm_id, size_change,
+											pv_dests, resize_options)
+		LvCommon.handle_execute(rc, out, err)
 		return "/"

 	@dbus.service.method(
@@ -670,8 +607,9 @@ class Lv(LvCommon):
 								options):
 		# Make sure we have a dbus object representing it
 		LvCommon.validate_dbus_object(uuid, lv_name)
-		LvCommon.handle_execute(*cmdhandler.activate_deactivate(
-			'lvchange', lv_name, activate, control_flags, options))
+		rc, out, err = cmdhandler.activate_deactivate(
+			'lvchange', lv_name, activate, control_flags, options)
+		LvCommon.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -705,8 +643,9 @@ class Lv(LvCommon):
 	def _add_rm_tags(uuid, lv_name, tags_add, tags_del, tag_options):
 		# Make sure we have a dbus object representing it
 		LvCommon.validate_dbus_object(uuid, lv_name)
-		LvCommon.handle_execute(*cmdhandler.lv_tag(
-			lv_name, tags_add, tags_del, tag_options))
+		rc, out, err = cmdhandler.lv_tag(
+			lv_name, tags_add, tags_del, tag_options)
+		LvCommon.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -743,152 +682,6 @@ class Lv(LvCommon):
 			cb, cbe, return_tuple=False)
 		cfg.worker_q.put(r)

-	@staticmethod
-	def _writecache_lv(lv_uuid, lv_name, lv_object_path, cache_options):
-		# Make sure we have a dbus object representing it
-		dbo = LvCommon.validate_dbus_object(lv_uuid, lv_name)
-
-		# Make sure we have dbus object representing lv to cache
-		lv_to_cache = cfg.om.get_object_by_path(lv_object_path)
-
-		if lv_to_cache:
-			fcn = lv_to_cache.lv_full_name()
-			rc, out, err = cmdhandler.lv_writecache_lv(
-				dbo.lv_full_name(), fcn, cache_options)
-			if rc == 0:
-				# When we cache an LV, the cache pool and the lv that is getting
-				# cached need to be removed from the object manager and
-				# re-created as their interfaces have changed!
-				mt_remove_dbus_objects((dbo, lv_to_cache))
-				cfg.load()
-
-				lv_converted = cfg.om.get_object_path_by_lvm_id(fcn)
-			else:
-				raise dbus.exceptions.DBusException(
-					LV_INTERFACE,
-					'Exit code %s, stderr = %s' % (str(rc), err))
-		else:
-			raise dbus.exceptions.DBusException(
-				LV_INTERFACE, 'LV to cache with object path %s not present!' %
-				lv_object_path)
-		return lv_converted
-
-	@dbus.service.method(
-		dbus_interface=LV_INTERFACE,
-		in_signature='oia{sv}',
-		out_signature='(oo)',
-		async_callbacks=('cb', 'cbe'))
-	def WriteCacheLv(self, lv_object, tmo, cache_options, cb, cbe):
-		r = RequestEntry(
-			tmo, Lv._writecache_lv,
-			(self.Uuid, self.lvm_id, lv_object,
-			cache_options), cb, cbe)
-		cfg.worker_q.put(r)
-
-
-# noinspection PyPep8Naming
-@utils.dbus_property(VDO_POOL_INTERFACE, 'OperatingMode', 's')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'CompressionState', 's')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'IndexState', 's')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'UsedSize', 't')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'SavingPercent', 'd')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'Compression', 's')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'Deduplication', 's')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'UseMetadataHints', 's')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'MinimumIoSize', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'BlockMapCacheSize', "t")
-@utils.dbus_property(VDO_POOL_INTERFACE, 'BlockMapEraLength', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'UseSparseIndex', 's')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'IndexMemorySize', 't')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'SlabSize', 't')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'AckThreads', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'BioThreads', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'BioRotation', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'CpuThreads', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'HashZoneThreads', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'LogicalThreads', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'PhysicalThreads', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'MaxDiscard', 'u')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'WritePolicy', 's')
-@utils.dbus_property(VDO_POOL_INTERFACE, 'HeaderSize', 'u')
-class LvVdoPool(Lv):
-	_DataLv_meta = ("o", VDO_POOL_INTERFACE)
-
-	def __init__(self, object_path, object_state):
-		super(LvVdoPool, self).__init__(object_path, object_state)
-		self.set_interface(VDO_POOL_INTERFACE)
-		self._data_lv, _ = self._get_data_meta()
-
-	@property
-	def DataLv(self):
-		return dbus.ObjectPath(self._data_lv)
-
-	@staticmethod
-	def _enable_disable_compression(pool_uuid, pool_name, enable, comp_options):
-		# Make sure we have a dbus object representing it
-		LvCommon.validate_dbus_object(pool_uuid, pool_name)
-		# Rename the logical volume
-		LvCommon.handle_execute(*cmdhandler.lv_vdo_compression(
-			pool_name, enable, comp_options))
-		return '/'
-
-	@dbus.service.method(
-		dbus_interface=VDO_POOL_INTERFACE,
-		in_signature='ia{sv}',
-		out_signature='o',
-		async_callbacks=('cb', 'cbe'))
-	def EnableCompression(self, tmo, comp_options, cb, cbe):
-		r = RequestEntry(
-			tmo, LvVdoPool._enable_disable_compression,
-			(self.Uuid, self.lvm_id, True, comp_options),
-			cb, cbe, False)
-		cfg.worker_q.put(r)
-
-	@dbus.service.method(
-	dbus_interface=VDO_POOL_INTERFACE,
-	in_signature='ia{sv}',
-	out_signature='o',
-	async_callbacks=('cb', 'cbe'))
-	def DisableCompression(self, tmo, comp_options, cb, cbe):
-		r = RequestEntry(
-			tmo, LvVdoPool._enable_disable_compression,
-			(self.Uuid, self.lvm_id, False, comp_options),
-			cb, cbe, False)
-		cfg.worker_q.put(r)
-
-	@staticmethod
-	def _enable_disable_deduplication(pool_uuid, pool_name, enable, dedup_options):
-		# Make sure we have a dbus object representing it
-		LvCommon.validate_dbus_object(pool_uuid, pool_name)
-		# Rename the logical volume
-		LvCommon.handle_execute(*cmdhandler.lv_vdo_deduplication(
-			pool_name, enable, dedup_options))
-		return '/'
-
-	@dbus.service.method(
-		dbus_interface=VDO_POOL_INTERFACE,
-		in_signature='ia{sv}',
-		out_signature='o',
-		async_callbacks=('cb', 'cbe'))
-	def EnableDeduplication(self, tmo, dedup_options, cb, cbe):
-		r = RequestEntry(
-			tmo, LvVdoPool._enable_disable_deduplication,
-			(self.Uuid, self.lvm_id, True, dedup_options),
-			cb, cbe, False)
-		cfg.worker_q.put(r)
-
-	@dbus.service.method(
-	dbus_interface=VDO_POOL_INTERFACE,
-	in_signature='ia{sv}',
-	out_signature='o',
-	async_callbacks=('cb', 'cbe'))
-	def DisableDeduplication(self, tmo, dedup_options, cb, cbe):
-		r = RequestEntry(
-			tmo, LvVdoPool._enable_disable_deduplication,
-			(self.Uuid, self.lvm_id, False, dedup_options),
-			cb, cbe, False)
-		cfg.worker_q.put(r)
-

 # noinspection PyPep8Naming
 class LvThinPool(Lv):
@@ -912,8 +705,10 @@ class LvThinPool(Lv):
 	def _lv_create(lv_uuid, lv_name, name, size_bytes, create_options):
 		# Make sure we have a dbus object representing it
 		dbo = LvCommon.validate_dbus_object(lv_uuid, lv_name)
-		LvCommon.handle_execute(*cmdhandler.lv_lv_create(
-			lv_name, create_options, name, size_bytes))
+
+		rc, out, err = cmdhandler.lv_lv_create(
+			lv_name, create_options, name, size_bytes)
+		LvCommon.handle_execute(rc, out, err)
 		full_name = "%s/%s" % (dbo.vg_name_lookup(), name)
 		return cfg.om.get_object_path_by_lvm_id(full_name)

--- a/daemons/lvmdbusd/lvmdb.py.in
+++ b/daemons/lvmdbusd/lvmdb.py.in
@@ -20,7 +20,7 @@ from lvmdbusd.utils import log_debug, log_error


 class DataStore(object):
-	def __init__(self, usejson=True, vdo_support=False):
+	def __init__(self, usejson=True):
 		self.pvs = {}
 		self.vgs = {}
 		self.lvs = {}
@@ -43,8 +43,6 @@ class DataStore(object):
 		else:
 			self.json = usejson

-		self.vdo_support = vdo_support
-
 	@staticmethod
 	def _insert_record(table, key, record, allowed_multiple):
 		if key in table:
@@ -243,7 +241,8 @@ class DataStore(object):

 		return DataStore._parse_lvs_common(c_lvs, c_lv_full_lookup)

-	def _parse_lvs_json(self, _all):
+	@staticmethod
+	def _parse_lvs_json(_all):

 		c_lvs = OrderedDict()
 		c_lv_full_lookup = {}
@@ -263,13 +262,8 @@ class DataStore(object):
 				if 'seg' in r:
 					for s in r['seg']:
 						r = c_lvs[s['lv_uuid']]
-						r.setdefault('seg_pe_ranges', []).\
-							append(s['seg_pe_ranges'])
+						r.setdefault('seg_pe_ranges', []).append(s['seg_pe_ranges'])
 						r.setdefault('segtype', []).append(s['segtype'])
-						if self.vdo_support:
-							for seg_key, seg_val in s.items():
-								if seg_key.startswith("vdo_"):
-									r[seg_key] = seg_val

 		return DataStore._parse_lvs_common(c_lvs, c_lv_full_lookup)

--- a/daemons/lvmdbusd/main.py
+++ b/daemons/lvmdbusd/main.py
@@ -29,7 +29,7 @@ from .utils import log_debug, log_error
 import argparse
 import os
 import sys
-from .cmdhandler import LvmFlightRecorder, supports_vdo
+from .cmdhandler import LvmFlightRecorder
 from .request import RequestEntry


@@ -44,10 +44,10 @@ def process_request():
 		try:
 			req = cfg.worker_q.get(True, 5)
 			log_debug(
-				"Method start: %s with args %s (callback = %s)" %
-				(str(req.method), str(req.arguments), str(req.cb)))
+				"Running method: %s with args %s" %
+				(str(req.method), str(req.arguments)))
 			req.run_cmd()
-			log_debug("Method complete: %s" % str(req.method))
+			log_debug("Method complete ")
 		except queue.Empty:
 			pass
 		except Exception:
@@ -127,14 +127,6 @@ def main():
 		log_error("You cannot specify --lvmshell and --nojson")
 		sys.exit(1)

-	# We will dynamically add interfaces which support vdo if it
-	# exists.
-	cfg.vdo_support = supports_vdo()
-
-	if cfg.vdo_support and not cfg.args.use_json:
-		log_error("You cannot specify --nojson when lvm has VDO support")
-		sys.exit(1)
-
 	# List of threads that we start up
 	thread_list = []

@@ -155,12 +147,12 @@ def main():
 	cfg.om = Lvm(BASE_OBJ_PATH)
 	cfg.om.register_object(Manager(MANAGER_OBJ_PATH))

-	cfg.db = lvmdb.DataStore(cfg.args.use_json, cfg.vdo_support)
+	cfg.db = lvmdb.DataStore(cfg.args.use_json)

 	# Using a thread to process requests, we cannot hang the dbus library
 	# thread that is handling the dbus interface
-	thread_list.append(
-		threading.Thread(target=process_request, name='process_request'))
+	thread_list.append(threading.Thread(target=process_request,
+										name='process_request'))

 	# Have a single thread handling updating lvm and the dbus model so we
 	# don't have multiple threads doing this as the same time
--- a/daemons/lvmdbusd/manager.py
+++ b/daemons/lvmdbusd/manager.py
@@ -27,7 +27,7 @@ class Manager(AutomatedProperties):

 	@property
 	def Version(self):
-		return dbus.String('1.1.0')
+		return dbus.String('1.0.0')

 	@staticmethod
 	def handle_execute(rc, out, err):
@@ -107,10 +107,10 @@ class Manager(AutomatedProperties):
 		rc = cfg.load(log=False)

 		if rc != 0:
-			utils.log_debug('Manager.Refresh - exit %d %d' % (rc, lc),
+			utils.log_debug('Manager.Refresh - exit %d' % (rc),
 							'bg_black', 'fg_light_red')
 		else:
-			utils.log_debug('Manager.Refresh - exit %d %d' % (rc, lc))
+			utils.log_debug('Manager.Refresh - exit %d' % (rc))
 		return rc + lc

 	@dbus.service.method(
--- a/daemons/lvmdbusd/pv.py
+++ b/daemons/lvmdbusd/pv.py
@@ -14,7 +14,7 @@ import dbus
 from .cfg import PV_INTERFACE
 from . import cmdhandler
 from .utils import vg_obj_path_generate, n, pv_obj_path_generate, \
-	lv_object_path_method, _handle_execute
+	lv_object_path_method
 from .loader import common
 from .request import RequestEntry
 from .state import State
@@ -138,12 +138,19 @@ class Pv(AutomatedProperties):
 		# Remove the PV, if successful then remove from the model
 		# Make sure we have a dbus object representing it
 		Pv.validate_dbus_object(pv_uuid, pv_name)
-		Pv.handle_execute(*cmdhandler.pv_remove(pv_name, remove_options))
+		rc, out, err = cmdhandler.pv_remove(pv_name, remove_options)
+		Pv.handle_execute(rc, out, err)
 		return '/'

 	@staticmethod
 	def handle_execute(rc, out, err):
-		return _handle_execute(rc, out, err, PV_INTERFACE)
+		if rc == 0:
+			cfg.load()
+		else:
+			# Need to work on error handling, need consistent
+			raise dbus.exceptions.DBusException(
+				PV_INTERFACE,
+				'Exit code %s, stderr = %s' % (str(rc), err))

 	@staticmethod
 	def validate_dbus_object(pv_uuid, pv_name):
@@ -171,8 +178,10 @@ class Pv(AutomatedProperties):
 	def _resize(pv_uuid, pv_name, new_size_bytes, resize_options):
 		# Make sure we have a dbus object representing it
 		Pv.validate_dbus_object(pv_uuid, pv_name)
-		Pv.handle_execute(*cmdhandler.pv_resize(pv_name, new_size_bytes,
-												resize_options))
+
+		rc, out, err = cmdhandler.pv_resize(pv_name, new_size_bytes,
+												resize_options)
+		Pv.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -191,8 +200,9 @@ class Pv(AutomatedProperties):
 	def _allocation_enabled(pv_uuid, pv_name, yes_no, allocation_options):
 		# Make sure we have a dbus object representing it
 		Pv.validate_dbus_object(pv_uuid, pv_name)
-		Pv.handle_execute(*cmdhandler.pv_allocatable(pv_name, yes_no,
-														allocation_options))
+		rc, out, err = cmdhandler.pv_allocatable(
+			pv_name, yes_no, allocation_options)
+		Pv.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
--- a/daemons/lvmdbusd/utils.py
+++ b/daemons/lvmdbusd/utils.py
@@ -26,15 +26,6 @@ import signal
 STDOUT_TTY = os.isatty(sys.stdout.fileno())


-def _handle_execute(rc, out, err, interface):
-	if rc == 0:
-		cfg.load()
-	else:
-		# Need to work on error handling, need consistent
-		raise dbus.exceptions.DBusException(
-			interface, 'Exit code %s, stderr = %s' % (str(rc), err))
-
-
 def rtype(dbus_type):
 	"""
 	Decorator making sure that the decorated function returns a value of
@@ -66,20 +57,8 @@ def n32(v):
 	return int(float(v))


-@rtype(dbus.Double)
-def d(v):
-	if not v:
-		return 0.0
-	return float(v)
-
-
-def _snake_to_pascal(s):
-	return ''.join(x.title() for x in s.split('_'))
-
-
 # noinspection PyProtectedMember
-def init_class_from_arguments(
-		obj_instance, begin_suffix=None, snake_to_pascal=False):
+def init_class_from_arguments(obj_instance):
 	for k, v in list(sys._getframe(1).f_locals.items()):
 		if k != 'self':
 			nt = k
@@ -90,17 +69,8 @@ def init_class_from_arguments(
 			cur = getattr(obj_instance, nt, v)

 			# print 'Init class %s = %s' % (nt, str(v))
-			if not (cur and len(str(cur)) and (v is None or len(str(v))) == 0)\
-					and (begin_suffix is None or nt.startswith(begin_suffix)):
-
-				if begin_suffix and nt.startswith(begin_suffix):
-					name = nt[len(begin_suffix):]
-					if snake_to_pascal:
-						name = _snake_to_pascal(name)
-
-					setattr(obj_instance, name, v)
-				else:
-					setattr(obj_instance, nt, v)
+			if not (cur and len(str(cur)) and (v is None or len(str(v))) == 0):
+				setattr(obj_instance, nt, v)


 def get_properties(f):
@@ -368,8 +338,6 @@ def lv_object_path_method(name, meta):
 		return _hidden_lv_obj_path_generate
 	elif meta[0][0] == 't':
 		return _thin_pool_obj_path_generate
-	elif meta[0][0] == 'd':
-		return _vdo_pool_object_path_generate
 	elif meta[0][0] == 'C' and 'pool' in meta[1]:
 		return _cache_pool_obj_path_generate

@@ -387,10 +355,6 @@ def _thin_pool_obj_path_generate():
 	return cfg.THIN_POOL_PATH + "/%d" % next(cfg.thin_id)


-def _vdo_pool_object_path_generate():
-	return cfg.VDO_POOL_PATH + "/%d" % next(cfg.vdo_id)
-
-
 def _cache_pool_obj_path_generate():
 	return cfg.CACHE_POOL_PATH + "/%d" % next(cfg.cache_pool_id)

@@ -482,7 +446,7 @@ _ALLOWABLE_CH_SET = set(_ALLOWABLE_CH)
 _ALLOWABLE_VG_LV_CH = string.ascii_letters + string.digits + '.-_+'
 _ALLOWABLE_VG_LV_CH_SET = set(_ALLOWABLE_VG_LV_CH)
 _LV_NAME_RESERVED = ("_cdata", "_cmeta", "_corig", "_mimage", "_mlog",
-	"_pmspare", "_rimage", "_rmeta", "_tdata", "_tmeta", "_vorigin", "_vdata")
+	"_pmspare", "_rimage", "_rmeta", "_tdata", "_tmeta", "_vorigin")

 # Tags can have the characters, based on the code
 # a-zA-Z0-9._-+/=!:&#
--- a/daemons/lvmdbusd/vg.py
+++ b/daemons/lvmdbusd/vg.py
@@ -10,11 +10,10 @@
 from .automatedproperties import AutomatedProperties

 from . import utils
-from .utils import pv_obj_path_generate, vg_obj_path_generate, n, \
-	_handle_execute
+from .utils import pv_obj_path_generate, vg_obj_path_generate, n
 import dbus
 from . import cfg
-from .cfg import VG_INTERFACE, VG_VDO_INTERFACE
+from .cfg import VG_INTERFACE
 from . import cmdhandler
 from .request import RequestEntry
 from .loader import common
@@ -47,7 +46,7 @@ def vgs_state_retrieve(selection, cache_refresh=True):

 def load_vgs(vg_specific=None, object_path=None, refresh=False,
 		emit_signal=False, cache_refresh=True):
-	return common(vgs_state_retrieve, (Vg, VgVdo, ), vg_specific, object_path, refresh,
+	return common(vgs_state_retrieve, (Vg,), vg_specific, object_path, refresh,
 					emit_signal, cache_refresh)


@@ -99,11 +98,7 @@ class VgState(State):
 		if not path:
 			path = cfg.om.get_object_path_by_uuid_lvm_id(
 				self.Uuid, self.internal_name, vg_obj_path_generate)
-
-		if cfg.vdo_support:
-			return VgVdo(path, self)
-		else:
-			return Vg(path, self)
+		return Vg(path, self)

 	# noinspection PyMethodMayBeStatic
 	def creation_signature(self):
@@ -159,7 +154,13 @@ class Vg(AutomatedProperties):

 	@staticmethod
 	def handle_execute(rc, out, err):
-		return _handle_execute(rc, out, err, VG_INTERFACE)
+		if rc == 0:
+			cfg.load()
+		else:
+			# Need to work on error handling, need consistent
+			raise dbus.exceptions.DBusException(
+				VG_INTERFACE,
+				'Exit code %s, stderr = %s' % (str(rc), err))

 	@staticmethod
 	def validate_dbus_object(vg_uuid, vg_name):
@@ -175,8 +176,9 @@ class Vg(AutomatedProperties):
 	def _rename(uuid, vg_name, new_name, rename_options):
 		# Make sure we have a dbus object representing it
 		Vg.validate_dbus_object(uuid, vg_name)
-		Vg.handle_execute(*cmdhandler.vg_rename(
-			uuid, new_name, rename_options))
+		rc, out, err = cmdhandler.vg_rename(
+			uuid, new_name, rename_options)
+		Vg.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -195,7 +197,8 @@ class Vg(AutomatedProperties):
 		# Make sure we have a dbus object representing it
 		Vg.validate_dbus_object(uuid, vg_name)
 		# Remove the VG, if successful then remove from the model
-		Vg.handle_execute(*cmdhandler.vg_remove(vg_name, remove_options))
+		rc, out, err = cmdhandler.vg_remove(vg_name, remove_options)
+		Vg.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -211,7 +214,8 @@ class Vg(AutomatedProperties):
 	@staticmethod
 	def _change(uuid, vg_name, change_options):
 		Vg.validate_dbus_object(uuid, vg_name)
-		Vg.handle_execute(*cmdhandler.vg_change(change_options, vg_name))
+		rc, out, err = cmdhandler.vg_change(change_options, vg_name)
+		Vg.handle_execute(rc, out, err)
 		return '/'

 	# TODO: This should be broken into a number of different methods
@@ -247,8 +251,9 @@ class Vg(AutomatedProperties):
 						VG_INTERFACE,
 						'PV Object path not found = %s!' % pv_op)

-		Vg.handle_execute(*cmdhandler.vg_reduce(
-			vg_name, missing, pv_devices, reduce_options))
+		rc, out, err = cmdhandler.vg_reduce(vg_name, missing, pv_devices,
+											reduce_options)
+		Vg.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -278,8 +283,9 @@ class Vg(AutomatedProperties):
 					VG_INTERFACE, 'PV Object path not found = %s!' % i)

 		if len(extend_devices):
-			Vg.handle_execute(*cmdhandler.vg_extend(
-				vg_name, extend_devices, extend_options))
+			rc, out, err = cmdhandler.vg_extend(vg_name, extend_devices,
+												extend_options)
+			Vg.handle_execute(rc, out, err)
 		else:
 			raise dbus.exceptions.DBusException(
 				VG_INTERFACE, 'No pv_object_paths provided!')
@@ -333,8 +339,10 @@ class Vg(AutomatedProperties):

 				pv_dests.append((pv_dbus_obj.lvm_id, pr[1], pr[2]))

-		Vg.handle_execute(*cmdhandler.vg_lv_create(
-			vg_name, create_options, name, size_bytes, pv_dests))
+		rc, out, err = cmdhandler.vg_lv_create(
+			vg_name, create_options, name, size_bytes, pv_dests)
+
+		Vg.handle_execute(rc, out, err)
 		return Vg.fetch_new_lv(vg_name, name)

 	@dbus.service.method(
@@ -372,8 +380,11 @@ class Vg(AutomatedProperties):
 			thin_pool, create_options):
 		# Make sure we have a dbus object representing it
 		Vg.validate_dbus_object(uuid, vg_name)
-		Vg.handle_execute(*cmdhandler.vg_lv_create_linear(
-			vg_name, create_options, name, size_bytes, thin_pool))
+
+		rc, out, err = cmdhandler.vg_lv_create_linear(
+			vg_name, create_options, name, size_bytes, thin_pool)
+
+		Vg.handle_execute(rc, out, err)
 		return Vg.fetch_new_lv(vg_name, name)

 	@dbus.service.method(
@@ -395,9 +406,10 @@ class Vg(AutomatedProperties):
 			stripe_size_kb, thin_pool, create_options):
 		# Make sure we have a dbus object representing it
 		Vg.validate_dbus_object(uuid, vg_name)
-		Vg.handle_execute(*cmdhandler.vg_lv_create_striped(
+		rc, out, err = cmdhandler.vg_lv_create_striped(
 			vg_name, create_options, name, size_bytes,
-			num_stripes, stripe_size_kb, thin_pool))
+			num_stripes, stripe_size_kb, thin_pool)
+		Vg.handle_execute(rc, out, err)
 		return Vg.fetch_new_lv(vg_name, name)

 	@dbus.service.method(
@@ -422,8 +434,9 @@ class Vg(AutomatedProperties):
 			num_copies, create_options):
 		# Make sure we have a dbus object representing it
 		Vg.validate_dbus_object(uuid, vg_name)
-		Vg.handle_execute(*cmdhandler.vg_lv_create_mirror(
-			vg_name, create_options, name, size_bytes, num_copies))
+		rc, out, err = cmdhandler.vg_lv_create_mirror(
+			vg_name, create_options, name, size_bytes, num_copies)
+		Vg.handle_execute(rc, out, err)
 		return Vg.fetch_new_lv(vg_name, name)

 	@dbus.service.method(
@@ -446,9 +459,10 @@ class Vg(AutomatedProperties):
 						num_stripes, stripe_size_kb, create_options):
 		# Make sure we have a dbus object representing it
 		Vg.validate_dbus_object(uuid, vg_name)
-		Vg.handle_execute(*cmdhandler.vg_lv_create_raid(
+		rc, out, err = cmdhandler.vg_lv_create_raid(
 			vg_name, create_options, name, raid_type, size_bytes,
-			num_stripes, stripe_size_kb))
+			num_stripes, stripe_size_kb)
+		Vg.handle_execute(rc, out, err)
 		return Vg.fetch_new_lv(vg_name, name)

 	@dbus.service.method(
@@ -546,8 +560,9 @@ class Vg(AutomatedProperties):
 				raise dbus.exceptions.DBusException(
 					VG_INTERFACE, 'PV object path = %s not found' % p)

-		Vg.handle_execute(*cmdhandler.pv_tag(
-			pv_devices, tags_add, tags_del, tag_options))
+		rc, out, err = cmdhandler.pv_tag(
+			pv_devices, tags_add, tags_del, tag_options)
+		Vg.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -588,8 +603,9 @@ class Vg(AutomatedProperties):
 		# Make sure we have a dbus object representing it
 		Vg.validate_dbus_object(uuid, vg_name)

-		Vg.handle_execute(*cmdhandler.vg_tag(
-			vg_name, tags_add, tags_del, tag_options))
+		rc, out, err = cmdhandler.vg_tag(
+			vg_name, tags_add, tags_del, tag_options)
+		Vg.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -628,7 +644,8 @@ class Vg(AutomatedProperties):
 	def _vg_change_set(uuid, vg_name, method, value, options):
 		# Make sure we have a dbus object representing it
 		Vg.validate_dbus_object(uuid, vg_name)
-		Vg.handle_execute(*method(vg_name, value, options))
+		rc, out, err = method(vg_name, value, options)
+		Vg.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -688,8 +705,9 @@ class Vg(AutomatedProperties):
 								options):
 		# Make sure we have a dbus object representing it
 		Vg.validate_dbus_object(uuid, vg_name)
-		Vg.handle_execute(*cmdhandler.activate_deactivate(
-			'vgchange', vg_name, activate, control_flags, options))
+		rc, out, err = cmdhandler.activate_deactivate(
+			'vgchange', vg_name, activate, control_flags, options)
+		Vg.handle_execute(rc, out, err)
 		return '/'

 	@dbus.service.method(
@@ -777,71 +795,3 @@ class Vg(AutomatedProperties):
 	@property
 	def Clustered(self):
 		return self._attribute(5, 'c')
-
-
-class VgVdo(Vg):
-
-	# noinspection PyUnusedLocal,PyPep8Naming
-	def __init__(self, object_path, object_state):
-		super(VgVdo, self).__init__(object_path, vgs_state_retrieve)
-		self.set_interface(VG_VDO_INTERFACE)
-		self._object_path = object_path
-		self.state = object_state
-
-	@staticmethod
-	def _lv_vdo_pool_create_with_lv(uuid, vg_name, pool_name, lv_name,
-									data_size, virtual_size, create_options):
-		Vg.validate_dbus_object(uuid, vg_name)
-		Vg.handle_execute(*cmdhandler.vg_create_vdo_pool_lv_and_lv(
-			vg_name, pool_name, lv_name, data_size, virtual_size,
-			create_options))
-		return Vg.fetch_new_lv(vg_name, pool_name)
-
-	@dbus.service.method(
-		dbus_interface=VG_VDO_INTERFACE,
-		in_signature='ssttia{sv}',
-		out_signature='(oo)',
-		async_callbacks=('cb', 'cbe'))
-	def CreateVdoPoolandLv(self, pool_name, lv_name, data_size, virtual_size,
-							tmo, create_options, cb, cbe):
-		utils.validate_lv_name(VG_VDO_INTERFACE, self.Name, pool_name)
-		utils.validate_lv_name(VG_VDO_INTERFACE, self.Name, lv_name)
-
-		r = RequestEntry(tmo, VgVdo._lv_vdo_pool_create_with_lv,
-							(self.state.Uuid, self.state.lvm_id,
-							pool_name, lv_name, round_size(data_size),
-							round_size(virtual_size),
-							create_options), cb, cbe)
-		cfg.worker_q.put(r)
-
-	@staticmethod
-	def _vdo_pool_create(uuid, vg_name, pool_lv, name, virtual_size, create_options):
-		Vg.validate_dbus_object(uuid, vg_name)
-
-		# Retrieve the full name of the pool lv
-		pool = cfg.om.get_object_by_path(pool_lv)
-		if not pool:
-			msg = 'LV with object path %s not present!' % \
-					(pool_lv)
-			raise dbus.exceptions.DBusException(VG_VDO_INTERFACE, msg)
-
-		Vg.handle_execute(*cmdhandler.vg_create_vdo_pool(
-			pool.lv_full_name(), name, virtual_size,
-			create_options))
-		return Vg.fetch_new_lv(vg_name, pool.Name)
-
-	@dbus.service.method(
-		dbus_interface=VG_VDO_INTERFACE,
-		in_signature='ostia{sv}',
-		out_signature='(oo)',
-		async_callbacks=('cb', 'cbe'))
-	def CreateVdoPool(self, pool_lv, name, virtual_size,
-						tmo, create_options, cb, cbe):
-		utils.validate_lv_name(VG_VDO_INTERFACE, self.Name, name)
-
-		r = RequestEntry(tmo, VgVdo._vdo_pool_create,
-							(self.state.Uuid, self.state.lvm_id,
-							pool_lv, name,
-							round_size(virtual_size),
-							create_options), cb, cbe)
-		cfg.worker_q.put(r)
--- a/daemons/lvmlockd/Makefile.in
+++ b/daemons/lvmlockd/Makefile.in
@@ -38,25 +38,18 @@ TARGETS = lvmlockd lvmlockctl

 include $(top_builddir)/make.tmpl

-CFLAGS += $(EXTRA_EXEC_CFLAGS)
+CFLAGS += $(EXTRA_EXEC_CFLAGS) $(SYSTEMD_CFLAGS)
 INCLUDES += -I$(top_srcdir)/libdaemon/server
-LDFLAGS += -L$(top_builddir)/libdaemon/server $(EXTRA_EXEC_LDFLAGS) $(ELDFLAGS)
-LIBS += $(RT_LIBS) $(DAEMON_LIBS) $(PTHREAD_LIBS)
+LDFLAGS += $(EXTRA_EXEC_LDFLAGS) $(ELDFLAGS)
+LIBS += $(PTHREAD_LIBS) $(SYSTEMD_LIBS)

-
-ifeq ($(USE_SD_NOTIFY),yes)
-	CFLAGS += $(shell pkg-config --cflags libsystemd) -DUSE_SD_NOTIFY
-	LIBS += $(shell pkg-config --libs libsystemd)
-endif
-
-lvmlockd: $(OBJECTS) $(top_builddir)/libdaemon/client/libdaemonclient.a \
-		    $(top_builddir)/libdaemon/server/libdaemonserver.a
+lvmlockd: $(OBJECTS) $(top_builddir)/libdaemon/server/libdaemonserver.a $(INTERNAL_LIBS)
 	@echo "    [CC] $@"
-	$(Q) $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(OBJECTS) $(LOCK_LIBS) -ldaemonserver $(INTERNAL_LIBS) $(LIBS)
+	$(Q) $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $+ $(LOCK_LIBS) $(LIBS)

-lvmlockctl: lvmlockctl.o $(top_builddir)/libdaemon/client/libdaemonclient.a
+lvmlockctl: lvmlockctl.o $(INTERNAL_LIBS)
 	@echo "    [CC] $@"
-	$(Q) $(CC) $(CFLAGS) $(LDFLAGS) -o $@ lvmlockctl.o $(INTERNAL_LIBS) $(LIBS)
+	$(Q) $(CC) $(CFLAGS) $(LDFLAGS) -o $@ $+ $(LIBS)

 install_lvmlockd: lvmlockd
 	@echo "    [INSTALL] $<"
--- a/daemons/lvmlockd/lvmlockctl.c
+++ b/daemons/lvmlockd/lvmlockctl.c
@@ -280,12 +280,13 @@ static void format_info_line(char *line, char *r_name, char *r_type)

 static void format_info(void)
 {
-	char line[MAX_LINE] = { 0 };
-	char r_name[MAX_NAME+1] = { 0 };
-	char r_type[MAX_NAME+1] = { 0 };
+	char line[MAX_LINE];
+	char r_name[MAX_NAME+1];
+	char r_type[MAX_NAME+1];
 	int i, j;

 	j = 0;
+	memset(line, 0, sizeof(line));

 	for (i = 0; i < dump_len; i++) {
 		line[j++] = dump_buf[i];
@@ -325,8 +326,6 @@ static int _lvmlockd_result(daemon_reply reply, int *result)
 {
 	int reply_result;

-	*result = NO_LOCKD_RESULT;
-
 	if (reply.error) {
 		log_error("lvmlockd_result reply error %d", reply.error);
 		return 0;
@@ -338,7 +337,7 @@ static int _lvmlockd_result(daemon_reply reply, int *result)
 	}

 	reply_result = daemon_reply_int(reply, "op_result", NO_LOCKD_RESULT);
-	if (reply_result == NO_LOCKD_RESULT) {
+	if (reply_result == -1000) {
 		log_error("lvmlockd_result no op_result");
 		return 0;
 	}
--- a/daemons/lvmlockd/lvmlockd-client.h
+++ b/daemons/lvmlockd/lvmlockd-client.h
@@ -14,7 +14,6 @@
 #include "libdaemon/client/daemon-client.h"

 #define LVMLOCKD_SOCKET DEFAULT_RUN_DIR "/lvmlockd.socket"
-#define LVMLOCKD_ADOPT_FILE DEFAULT_RUN_DIR "/lvmlockd.adopt"

 /* Wrappers to open/close connection */

@@ -23,9 +22,9 @@ static inline daemon_handle lvmlockd_open(const char *sock)
 	daemon_info lvmlockd_info = {
 		.path = "lvmlockd",
 		.socket = sock ?: LVMLOCKD_SOCKET,
-		.autostart = 0,
 		.protocol = "lvmlockd",
 		.protocol_version = 1,
+		.autostart = 0
 	};

 	return daemon_open(lvmlockd_info);
@@ -33,7 +32,7 @@ static inline daemon_handle lvmlockd_open(const char *sock)

 static inline void lvmlockd_close(daemon_handle h)
 {
-	daemon_close(h);
+	return daemon_close(h);
 }

 /*
--- a/daemons/lvmlockd/lvmlockd-core.c
+++ b/daemons/lvmlockd/lvmlockd-core.c
@@ -31,15 +31,13 @@
 #include <sys/utsname.h>
 #include <sys/un.h>

-#ifdef USE_SD_NOTIFY
+#ifdef NOTIFYDBUS_SUPPORT
 #include <systemd/sd-daemon.h>
 #endif

 #define EXTERN
 #include "lvmlockd-internal.h"

-static int str_to_mode(const char *str);
-
 /*
 * Basic operation of lvmlockd
 *
@@ -144,8 +142,6 @@ static const char *lvmlockd_protocol = "lvmlockd";
 static const int lvmlockd_protocol_version = 1;
 static int daemon_quit;
 static int adopt_opt;
-static uint32_t adopt_update_count;
-static const char *adopt_file;

 /*
 * We use a separate socket for dumping daemon info.
@@ -815,144 +811,6 @@ int version_from_args(char *args, unsigned int *major, unsigned int *minor, unsi
 	return 0;
 }

-/*
- * Write new info when a command exits if that command has acquired a new LV
- * lock.  If the command has released an LV lock we don't bother updating the
- * info.  When adopting, we eliminate any LV lock adoptions if there is no dm
- * device for that LV.  If lvmlockd is terminated after acquiring but before
- * writing this file, those LV locks would not be adopted on restart.
- */
-
-#define ADOPT_VERSION_MAJOR 1
-#define ADOPT_VERSION_MINOR 0
-
-static void write_adopt_file(void)
-{
-	struct lockspace *ls;
-	struct resource *r;
-	struct lock *lk;
-	time_t t;
-	FILE *fp;
-
-	if (!(fp = fopen(adopt_file, "w")))
-		return;
-
-	adopt_update_count++;
-
-	t = time(NULL);
-	fprintf(fp, "lvmlockd adopt_version %u.%u pid %d updates %u %s",
-		ADOPT_VERSION_MAJOR, ADOPT_VERSION_MINOR, getpid(), adopt_update_count, ctime(&t));
-
-	pthread_mutex_lock(&lockspaces_mutex);
-	list_for_each_entry(ls, &lockspaces, list) {
-		if (ls->lm_type == LD_LM_DLM && !strcmp(ls->name, gl_lsname_dlm))
-			continue;
-		fprintf(fp, "VG: %38s %s %s %s\n",
-			ls->vg_uuid, ls->vg_name, lm_str(ls->lm_type), ls->vg_args);
-		list_for_each_entry(r, &ls->resources, list) {
-			if (r->type != LD_RT_LV)
-				continue;
-			if ((r->mode != LD_LK_EX) && (r->mode != LD_LK_SH))
-				continue;
-			list_for_each_entry(lk, &r->locks, list) {
-				fprintf(fp, "LV: %38s %s %s %s %u\n",
-					ls->vg_uuid, r->name, r->lv_args, mode_str(r->mode), r->version);
-			}
-		}
-	}
-	pthread_mutex_unlock(&lockspaces_mutex);
-
-	fflush(fp);
-	fclose(fp);
-}
-
-static int read_adopt_file(struct list_head *vg_lockd)
-{
-	char adopt_line[512];
-	char vg_uuid[72];
-	char lm_type_str[16];
-	char mode[8];
-	struct lockspace *ls, *ls2;
-	struct resource *r;
-	FILE *fp;
-
-	if (MAX_ARGS != 64 || MAX_NAME != 64)
-		return -1;
-
-	if (!(fp = fopen(adopt_file, "r")))
-		return 0;
-
-	while (fgets(adopt_line, sizeof(adopt_line), fp)) {
-		if (adopt_line[0] == '#')
-			continue;
-		else if (!strncmp(adopt_line, "lvmlockd", 8)) {
-			unsigned int v_major = 0, v_minor = 0;
-			if ((sscanf(adopt_line, "lvmlockd adopt_version %u.%u", &v_major, &v_minor) != 2) ||
-			    (v_major != ADOPT_VERSION_MAJOR))
-				goto fail;
-
-		} else if (!strncmp(adopt_line, "VG:", 3)) {
-			if (!(ls = alloc_lockspace()))
-				goto fail;
-
-			memset(vg_uuid, 0, sizeof(vg_uuid));
-
-			if (sscanf(adopt_line, "VG: %63s %64s %16s %64s",
-				   vg_uuid, ls->vg_name, lm_type_str, ls->vg_args) != 4) {
-				goto fail;
-			}
-
-			memcpy(ls->vg_uuid, vg_uuid, 64);
-
-			if ((ls->lm_type = str_to_lm(lm_type_str)) < 0)
-				goto fail;
-
-			list_add(&ls->list, vg_lockd);
-
-		} else if (!strncmp(adopt_line, "LV:", 3)) {
-			if (!(r = alloc_resource()))
-				goto fail;
-
-			r->type = LD_RT_LV;
-
-			memset(vg_uuid, 0, sizeof(vg_uuid));
-
-			if (sscanf(adopt_line, "LV: %64s %64s %s %8s %u",
-				   vg_uuid, r->name, r->lv_args, mode, &r->version) != 5) {
-				goto fail;
-			}
-
-			if ((r->adopt_mode = str_to_mode(mode)) == LD_LK_IV)
-				goto fail;
-
-			if (ls && !memcmp(ls->vg_uuid, vg_uuid, 64)) {
-				list_add(&r->list, &ls->resources);
-				r = NULL;
-			} else {
-				list_for_each_entry(ls2, vg_lockd, list) {
-					if (memcmp(ls2->vg_uuid, vg_uuid, 64))
-						continue;
-					list_add(&r->list, &ls2->resources);
-					r = NULL;
-					break;
-				}
-			}
-
-			if (r) {
-				log_error("No lockspace found for resource %s vg_uuid %s", r->name, vg_uuid);
-				goto fail;
-			}
-		}
-	}
-
-	fclose(fp);
-	return 0;
-
-fail:
-	fclose(fp);
-	return -1;
-}
-
 /*
 * These are few enough that arrays of function pointers can
 * be avoided.
@@ -4831,7 +4689,6 @@ static void *client_thread_main(void *arg_in)
 	struct client *cl;
 	struct action *act;
 	struct action *act_un;
-	uint32_t lock_acquire_count = 0, lock_acquire_written = 0;
 	int rv;

 	while (1) {
@@ -4863,9 +4720,6 @@ static void *client_thread_main(void *arg_in)
 				rv = -1;
 			}

-			if (act->flags & LD_AF_LV_LOCK)
-				lock_acquire_count++;
-
 			/*
 			 * The client failed after we acquired an LV lock for
 			 * it, but before getting this reply saying it's done.
@@ -4887,11 +4741,6 @@ static void *client_thread_main(void *arg_in)
 			continue;
 		}

-		if (adopt_opt && (lock_acquire_count > lock_acquire_written)) {
-			lock_acquire_written = lock_acquire_count;
-			write_adopt_file();
-		}
-
 		/*
 		 * Queue incoming actions for lockspace threads
 		 */
@@ -4965,8 +4814,6 @@ static void *client_thread_main(void *arg_in)
 			pthread_mutex_unlock(&client_mutex);
 	}
 out:
-	if (adopt_opt && lock_acquire_written)
-		unlink(adopt_file);
 	return NULL;
 }

@@ -4999,6 +4846,180 @@ static void close_client_thread(void)
 		log_error("pthread_join client_thread error %d", perrno);
 }

+/*
+ * Get a list of all VGs with a lockd type (sanlock|dlm).
+ * We'll match this list against a list of existing lockspaces that are
+ * found in the lock manager.
+ *
+ * For each of these VGs, also create a struct resource on ls->resources to
+ * represent each LV in the VG that uses a lock.  For each of these LVs
+ * that are active, we'll attempt to adopt a lock.
+ */
+
+static int get_lockd_vgs(struct list_head *vg_lockd)
+{
+	/* FIXME: get VGs some other way */
+	return -1;
+#if 0
+	struct list_head update_vgs;
+	daemon_reply reply;
+	struct dm_config_node *cn;
+	struct dm_config_node *metadata;
+	struct dm_config_node *md_cn;
+	struct dm_config_node *lv_cn;
+	struct lockspace *ls, *safe;
+	struct resource *r;
+	const char *vg_name;
+	const char *vg_uuid;
+	const char *lv_uuid;
+	const char *lock_type;
+	const char *lock_args;
+	char find_str_path[PATH_MAX];
+	int rv = 0;
+
+	INIT_LIST_HEAD(&update_vgs);
+
+	reply = send_lvmetad("vg_list", "token = %s", "skip", NULL);
+
+	if (reply.error || strcmp(daemon_reply_str(reply, "response", ""), "OK")) {
+		log_error("vg_list from lvmetad failed %d", reply.error);
+		rv = -EINVAL;
+		goto destroy;
+	}
+
+	if (!(cn = dm_config_find_node(reply.cft->root, "volume_groups"))) {
+		log_error("get_lockd_vgs no vgs");
+		rv = -EINVAL;
+		goto destroy;
+	}
+
+	/* create an update_vgs list of all vg uuids */
+
+	for (cn = cn->child; cn; cn = cn->sib) {
+		vg_uuid = cn->key;
+
+		if (!(ls = alloc_lockspace())) {
+			rv = -ENOMEM;
+			break;
+		}
+
+		strncpy(ls->vg_uuid, vg_uuid, 64);
+		list_add_tail(&ls->list, &update_vgs);
+		log_debug("get_lockd_vgs %s", vg_uuid);
+	}
+ destroy:
+	daemon_reply_destroy(reply);
+
+	if (rv < 0)
+		goto out;
+
+	/* get vg_name and lock_type for each vg uuid entry in update_vgs */
+
+	list_for_each_entry(ls, &update_vgs, list) {
+		reply = send_lvmetad("vg_lookup",
+				     "token = %s", "skip",
+				     "uuid = %s", ls->vg_uuid,
+				     NULL);
+
+		if (reply.error || strcmp(daemon_reply_str(reply, "response", ""), "OK")) {
+			log_error("vg_lookup from lvmetad failed %d", reply.error);
+			rv = -EINVAL;
+			goto next;
+		}
+
+		vg_name = daemon_reply_str(reply, "name", NULL);
+		if (!vg_name) {
+			log_error("get_lockd_vgs %s no name", ls->vg_uuid);
+			rv = -EINVAL;
+			goto next;
+		}
+
+		strncpy(ls->vg_name, vg_name, MAX_NAME);
+
+		metadata = dm_config_find_node(reply.cft->root, "metadata");
+		if (!metadata) {
+			log_error("get_lockd_vgs %s name %s no metadata",
+				  ls->vg_uuid, ls->vg_name);
+			rv = -EINVAL;
+			goto next;
+		}
+
+		lock_type = dm_config_find_str(metadata, "metadata/lock_type", NULL);
+		ls->lm_type = str_to_lm(lock_type);
+
+		if ((ls->lm_type != LD_LM_SANLOCK) && (ls->lm_type != LD_LM_DLM)) {
+			log_debug("get_lockd_vgs %s not lockd type", ls->vg_name);
+			continue;
+		}
+
+		lock_args = dm_config_find_str(metadata, "metadata/lock_args", NULL);
+		if (lock_args)
+			strncpy(ls->vg_args, lock_args, MAX_ARGS);
+
+		log_debug("get_lockd_vgs %s lock_type %s lock_args %s",
+			  ls->vg_name, lock_type, lock_args ?: "none");
+
+		/*
+		 * Make a record (struct resource) of each lv that uses a lock.
+		 * For any lv that uses a lock, we'll check if the lv is active
+		 * and if so try to adopt a lock for it.
+		 */
+
+		for (md_cn = metadata->child; md_cn; md_cn = md_cn->sib) {
+			if (strcmp(md_cn->key, "logical_volumes"))
+				continue;
+
+			for (lv_cn = md_cn->child; lv_cn; lv_cn = lv_cn->sib) {
+				snprintf(find_str_path, PATH_MAX, "%s/lock_args", lv_cn->key);
+				lock_args = dm_config_find_str(lv_cn, find_str_path, NULL);
+				if (!lock_args)
+					continue;
+
+				snprintf(find_str_path, PATH_MAX, "%s/id", lv_cn->key);
+				lv_uuid = dm_config_find_str(lv_cn, find_str_path, NULL);
+
+				if (!lv_uuid) {
+					log_error("get_lock_vgs no lv id for name %s", lv_cn->key);
+					continue;
+				}
+
+				if (!(r = alloc_resource())) {
+					rv = -ENOMEM;
+					goto next;
+				}
+
+				r->use_vb = 0;
+				r->type = LD_RT_LV;
+				strncpy(r->name, lv_uuid, MAX_NAME);
+				if (lock_args)
+					strncpy(r->lv_args, lock_args, MAX_ARGS);
+				list_add_tail(&r->list, &ls->resources);
+				log_debug("get_lockd_vgs %s lv %s %s (name %s)",
+					  ls->vg_name, r->name, lock_args ? lock_args : "", lv_cn->key);
+			}
+		}
+ next:
+		daemon_reply_destroy(reply);
+
+		if (rv < 0)
+			break;
+	}
+out:
+	/* Return lockd VG's on the vg_lockd list. */
+
+	list_for_each_entry_safe(ls, safe, &update_vgs, list) {
+		list_del(&ls->list);
+
+		if ((ls->lm_type == LD_LM_SANLOCK) || (ls->lm_type == LD_LM_DLM))
+			list_add_tail(&ls->list, vg_lockd);
+		else
+			free(ls);
+	}
+
+	return rv;
+#endif
+}
+
 static char _dm_uuid[DM_UUID_LEN];

 static char *get_dm_uuid(char *dm_name)
@@ -5215,9 +5236,9 @@ static void adopt_locks(void)
 	INIT_LIST_HEAD(&to_unlock);

 	/*
-	 * Get list of lockspaces from currently running lock managers.
-	 * Get list of shared VGs from file written by prior lvmlockd.
-	 * Get list of active LVs (in the shared VGs) from the file.
+	 * Get list of lockspaces from lock managers.
+	 * Get list of VGs from lvmetad with a lockd type.
+	 * Get list of active lockd type LVs from /dev.
 	 */

 	if (lm_support_dlm() && lm_is_running_dlm()) {
@@ -5241,17 +5262,12 @@ static void adopt_locks(void)
 	 * Adds a struct lockspace to vg_lockd for each lockd VG.
 	 * Adds a struct resource to ls->resources for each LV.
 	 */
-	rv = read_adopt_file(&vg_lockd);
+	rv = get_lockd_vgs(&vg_lockd);
 	if (rv < 0) {
-		log_error("adopt_locks read_adopt_file failed");
+		log_error("adopt_locks get_lockd_vgs failed");
 		goto fail;
 	}

-	if (list_empty(&vg_lockd)) {
-		log_debug("No lockspaces in adopt file");
-		return;
-	}
-
 	/*
 	 * For each resource on each lockspace, check if the
 	 * corresponding LV is active.  If so, leave the
@@ -5490,7 +5506,7 @@ static void adopt_locks(void)
 				goto fail;
 			act->op = LD_OP_LOCK;
 			act->rt = LD_RT_LV;
-			act->mode = r->adopt_mode;
+			act->mode = LD_LK_EX;
 			act->flags = (LD_AF_ADOPT | LD_AF_PERSISTENT);
 			act->client_id = INTERNAL_CLIENT_ID;
 			act->lm_type = ls->lm_type;
@@ -5588,9 +5604,8 @@ static void adopt_locks(void)
 			 * Adopt failed because the orphan has a different mode
 			 * than initially requested.  Repeat the lock-adopt operation
 			 * with the other mode.  N.B. this logic depends on first
-			 * trying sh then ex for GL/VG locks; for LV locks the mode
-			 * from the adopt file is tried first, the alternate
-			 * (if the mode in adopt file was wrong somehow.)
+			 * trying sh then ex for GL/VG locks, and ex then sh for
+			 * LV locks.
 			 */

 			if ((act->rt != LD_RT_LV) && (act->mode == LD_LK_SH)) {
@@ -5598,12 +5613,9 @@ static void adopt_locks(void)
 				act->mode = LD_LK_EX;
 				rv = add_lock_action(act);

-			} else if (act->rt == LD_RT_LV) {
-				/* LV locks: attempt to adopt the other mode. */
-				if (act->mode == LD_LK_EX)
-					act->mode = LD_LK_SH;
-				else if (act->mode == LD_LK_SH)
-					act->mode = LD_LK_EX;
+			} else if ((act->rt == LD_RT_LV) && (act->mode == LD_LK_EX)) {
+				/* LV locks: attempt to adopt sh after ex failed. */
+				act->mode = LD_LK_SH;
 				rv = add_lock_action(act);

 			} else {
@@ -5738,13 +5750,10 @@ static void adopt_locks(void)
 	if (count_start_fail || count_adopt_fail)
 		goto fail;

-	unlink(adopt_file);
-	write_adopt_file();
 	log_debug("adopt_locks done");
 	return;

 fail:
-	unlink(adopt_file);
 	log_error("adopt_locks failed, reset host");
 }

@@ -6019,8 +6028,6 @@ static void usage(char *prog, FILE *file)
 	fprintf(file, "        Set path to the pid file. [%s]\n", LVMLOCKD_PIDFILE);
 	fprintf(file, "  --socket-path | -s <path>\n");
 	fprintf(file, "        Set path to the socket to listen on. [%s]\n", LVMLOCKD_SOCKET);
-	fprintf(file, "  --adopt-file <path>\n");
-	fprintf(file, "        Set path to the adopt file. [%s]\n", LVMLOCKD_ADOPT_FILE);
 	fprintf(file, "  --syslog-priority | -S err|warning|debug\n");
 	fprintf(file, "        Write log messages from this level up to syslog. [%s]\n", _syslog_num_to_name(LOG_SYSLOG_PRIO));
 	fprintf(file, "  --gl-type | -g <str>\n");
@@ -6038,14 +6045,14 @@ static void usage(char *prog, FILE *file)
 int main(int argc, char *argv[])
 {
 	daemon_state ds = {
-		.name = "lvmlockd",
+		.daemon_main = main_loop,
+		.daemon_init = NULL,
+		.daemon_fini = NULL,
 		.pidfile = getenv("LVM_LVMLOCKD_PIDFILE"),
 		.socket_path = getenv("LVM_LVMLOCKD_SOCKET"),
 		.protocol = lvmlockd_protocol,
 		.protocol_version = lvmlockd_protocol_version,
-		.daemon_init = NULL,
-		.daemon_fini = NULL,
-		.daemon_main = main_loop,
+		.name = "lvmlockd",
 	};

 	static struct option long_options[] = {
@@ -6056,7 +6063,6 @@ int main(int argc, char *argv[])
 		{"daemon-debug",    no_argument,       0, 'D' },
 		{"pid-file",        required_argument, 0, 'p' },
 		{"socket-path",     required_argument, 0, 's' },
-		{"adopt-file",      required_argument, 0, 128 },
 		{"gl-type",         required_argument, 0, 'g' },
 		{"host-id",         required_argument, 0, 'i' },
 		{"host-id-file",    required_argument, 0, 'F' },
@@ -6079,9 +6085,6 @@ int main(int argc, char *argv[])
 		switch (c) {
 		case '0':
 			break;
-		case 128:
-			adopt_file = strdup(optarg);
-			break;
 		case 'h':
 			usage(argv[0], stdout);
 			exit(EXIT_SUCCESS);
@@ -6143,9 +6146,6 @@ int main(int argc, char *argv[])
 	if (!ds.socket_path)
 		ds.socket_path = LVMLOCKD_SOCKET;

-	if (!adopt_file)
-		adopt_file = LVMLOCKD_ADOPT_FILE;
-
 	/* runs daemon_main/main_loop */
 	daemon_start(ds);

--- a/daemons/lvmlockd/lvmlockd-dlm.c
+++ b/daemons/lvmlockd/lvmlockd-dlm.c
@@ -398,18 +398,12 @@ static int lm_adopt_dlm(struct lockspace *ls, struct resource *r, int ld_mode,
 			  (void *)1, (void *)1, (void *)1,
 			  NULL, NULL);

-	if (rv == -1 && (errno == EAGAIN)) {
+	if (rv == -1 && errno == -EAGAIN) {
 		log_debug("S %s R %s adopt_dlm adopt mode %d try other mode",
 			  ls->name, r->name, ld_mode);
 		rv = -EUCLEAN;
 		goto fail;
 	}
-	if (rv == -1 && (errno == ENOENT)) {
-		log_debug("S %s R %s adopt_dlm adopt mode %d no lock",
-			  ls->name, r->name, ld_mode);
-		rv = -ENOENT;
-		goto fail;
-	}
 	if (rv < 0) {
 		log_debug("S %s R %s adopt_dlm mode %d flags %x error %d errno %d",
 			  ls->name, r->name, mode, flags, rv, errno);
--- a/daemons/lvmlockd/lvmlockd-internal.h
+++ b/daemons/lvmlockd/lvmlockd-internal.h
@@ -11,8 +11,6 @@
 #ifndef _LVM_LVMLOCKD_INTERNAL_H
 #define _LVM_LVMLOCKD_INTERNAL_H

-#include "base/memory/container_of.h"
-
 #define MAX_NAME 64
 #define MAX_ARGS 64

@@ -147,7 +145,6 @@ struct resource {
 	char name[MAX_NAME+1];		/* vg name or lv name */
 	int8_t type;			/* resource type LD_RT_ */
 	int8_t mode;
-	int8_t adopt_mode;
 	unsigned int sh_count;		/* number of sh locks on locks list */
 	uint32_t version;
 	uint32_t last_client_id;	/* last client_id to lock or unlock resource */
@@ -158,7 +155,7 @@ struct resource {
 	struct list_head locks;
 	struct list_head actions;
 	char lv_args[MAX_ARGS+1];
-	char lm_data[];			/* lock manager specific data */
+	char lm_data[0];		/* lock manager specific data */
 };

 #define LD_LF_PERSISTENT 0x00000001
@@ -219,6 +216,10 @@ struct val_blk {
 /* lm_unlock flags */
 #define LMUF_FREE_VG 0x00000001

+#define container_of(ptr, type, member) ({                      \
+	const typeof( ((type *)0)->member ) *__mptr = (ptr);    \
+	(type *)( (char *)__mptr - offsetof(type,member) );})
+
 static inline void INIT_LIST_HEAD(struct list_head *list)
 {
 	list->next = list;
--- a/device_mapper/all.h
+++ b/device_mapper/all.h
@@ -121,9 +121,7 @@ enum {

 	DM_DEVICE_SET_GEOMETRY,

-	DM_DEVICE_ARM_POLL,
-
-	DM_DEVICE_GET_TARGET_VERSION
+	DM_DEVICE_ARM_POLL
 };

 /*
@@ -164,20 +162,20 @@ struct dm_info {
 struct dm_deps {
 	uint32_t count;
 	uint32_t filler;
-	uint64_t device[];
+	uint64_t device[0];
 };

 struct dm_names {
 	uint64_t dev;
 	uint32_t next;		/* Offset to next struct from start of this struct */
-	char name[];
+	char name[0];
 };

 struct dm_versions {
 	uint32_t next;		/* Offset to next struct from start of this struct */
 	uint32_t version[3];

-	char name[];
+	char name[0];
 };

 int dm_get_library_version(char *version, size_t size);
@@ -234,7 +232,6 @@ int dm_task_suppress_identical_reload(struct dm_task *dmt);
 int dm_task_secure_data(struct dm_task *dmt);
 int dm_task_retry_remove(struct dm_task *dmt);
 int dm_task_deferred_remove(struct dm_task *dmt);
-void dm_task_skip_reload_params_compare(struct dm_task *dmt);

 /*
 * Record timestamp immediately after the ioctl returns.
@@ -384,7 +381,7 @@ int dm_get_status_cache(struct dm_pool *mem, const char *params,
 			struct dm_status_cache **status);

 struct dm_status_writecache {
-	uint64_t error;
+	uint32_t error;
 	uint64_t total_blocks;
 	uint64_t free_blocks;
 	uint64_t writeback_blocks;
@@ -393,15 +390,6 @@ struct dm_status_writecache {
 int dm_get_status_writecache(struct dm_pool *mem, const char *params,
                             struct dm_status_writecache **status);

-struct dm_status_integrity {
-	uint64_t number_of_mismatches;
-	uint64_t provided_data_sectors;
-	uint64_t recalc_sector;
-};
-
-int dm_get_status_integrity(struct dm_pool *mem, const char *params,
-                            struct dm_status_integrity **status);
-
 /*
 * Parse params from STATUS call for snapshot target
 *
@@ -951,8 +939,6 @@ struct writecache_settings {
 	uint64_t autocommit_time; /* in milliseconds */
 	uint32_t fua;
 	uint32_t nofua;
-	uint32_t cleaner;
-	uint32_t max_age;

 	/*
 	 * Allow an unrecognized key and its val to be passed to the kernel for
@@ -972,8 +958,6 @@ struct writecache_settings {
 	unsigned autocommit_time_set:1;
 	unsigned fua_set:1;
 	unsigned nofua_set:1;
-	unsigned cleaner_set:1;
-	unsigned max_age_set:1;
 };

 int dm_tree_node_add_writecache_target(struct dm_tree_node *node,
@@ -984,42 +968,12 @@ int dm_tree_node_add_writecache_target(struct dm_tree_node *node,
 				uint32_t writecache_block_size,
 				struct writecache_settings *settings);

-struct integrity_settings {
-	char mode[8];
-	uint32_t tag_size;
-	uint32_t block_size;       /* optional table param always set by lvm */
-	const char *internal_hash; /* optional table param always set by lvm */
-
-	uint32_t journal_sectors;
-	uint32_t interleave_sectors;
-	uint32_t buffer_sectors;
-	uint32_t journal_watermark;
-	uint32_t commit_time;
-	uint32_t bitmap_flush_interval;
-	uint64_t sectors_per_bit;
-
-	unsigned journal_sectors_set:1;
-	unsigned interleave_sectors_set:1;
-	unsigned buffer_sectors_set:1;
-	unsigned journal_watermark_set:1;
-	unsigned commit_time_set:1;
-	unsigned bitmap_flush_interval_set:1;
-	unsigned sectors_per_bit_set:1;
-};
-
-int dm_tree_node_add_integrity_target(struct dm_tree_node *node,
-				uint64_t size,
-				const char *origin_uuid,
-				const char *meta_uuid,
-				struct integrity_settings *settings,
-				int recalculate);

 /*
 * VDO target
 */
 int dm_tree_node_add_vdo_target(struct dm_tree_node *node,
 				uint64_t size,
-				const char *vdo_pool_name,
 				const char *data_uuid,
 				uint64_t data_size,
 				const struct dm_vdo_target_params *param);
@@ -1318,7 +1272,7 @@ int dm_bit_get_next(dm_bitset_t bs, int last_bit);
 int dm_bit_get_last(dm_bitset_t bs);
 int dm_bit_get_prev(dm_bitset_t bs, int last_bit);

-#define DM_BITS_PER_INT ((unsigned)sizeof(int) * CHAR_BIT)
+#define DM_BITS_PER_INT (sizeof(int) * CHAR_BIT)

 #define dm_bit(bs, i) \
   ((bs)[((i) / DM_BITS_PER_INT) + 1] & (0x1 << ((i) & (DM_BITS_PER_INT - 1))))
--- a/device_mapper/ioctl/libdm-iface.c
+++ b/device_mapper/ioctl/libdm-iface.c
@@ -119,9 +119,6 @@ static struct cmd_data _cmd_data_v4[] = {
 #ifdef DM_DEV_ARM_POLL
 	{"armpoll",	DM_DEV_ARM_POLL,	{4, 36, 0}},
 #endif
-#ifdef DM_GET_TARGET_VERSION
-	{"target-version", DM_GET_TARGET_VERSION, {4, 41, 0}},
-#endif
 };
 /* *INDENT-ON* */

@@ -205,7 +202,7 @@ static int _get_proc_number(const char *file, const char *name,
 	}

 	while (getline(&line, &len, fl) != -1) {
-		if (sscanf(line, "%u %255s\n", &num, &nm[0]) == 2) {
+		if (sscanf(line, "%d %255s\n", &num, &nm[0]) == 2) {
 			if (!strcmp(name, nm)) {
 				if (number) {
 					*number = num;
@@ -805,11 +802,6 @@ int dm_task_suppress_identical_reload(struct dm_task *dmt)
 	return 1;
 }

-void dm_task_skip_reload_params_compare(struct dm_task *dmt)
-{
-	dmt->skip_reload_params_compare = 1;
-}
-
 int dm_task_set_add_node(struct dm_task *dmt, dm_add_node_t add_node)
 {
 	switch (add_node) {
@@ -1580,29 +1572,11 @@ static int _reload_with_suppression_v4(struct dm_task *dmt)
 		len = strlen(t2->params);
 		while (len-- > 0 && t2->params[len] == ' ')
 			t2->params[len] = '\0';
-
-		if (t1->start != t2->start) {
-			log_debug("reload %u:%u start diff", task->major, task->minor);
+		if ((t1->start != t2->start) ||
+		    (t1->length != t2->length) ||
+		    (strcmp(t1->type, t2->type)) ||
+		    (strcmp(t1->params, t2->params)))
 			goto no_match;
-		}
-		if (t1->length != t2->length) {
-			log_debug("reload %u:%u length diff", task->major, task->minor);
-			goto no_match;
-		}
-		if (strcmp(t1->type, t2->type)) {
-			log_debug("reload %u:%u type diff %s %s", task->major, task->minor, t1->type, t2->type);
-			goto no_match;
-		}
-		if (strcmp(t1->params, t2->params)) {
-			if (dmt->skip_reload_params_compare)
-				log_debug("reload %u:%u skip params ignore %s %s",
-					  task->major, task->minor, t1->params, t2->params);
-			else {
-				log_debug("reload %u:%u params diff", task->major, task->minor);
-				goto no_match;
-			}
-		}
-
 		t1 = t1->next;
 		t2 = t2->next;
 	}
--- a/device_mapper/ioctl/libdm-targets.h
+++ b/device_mapper/ioctl/libdm-targets.h
@@ -59,7 +59,6 @@ struct dm_task {
 	int skip_lockfs;
 	int query_inactive_table;
 	int suppress_identical_reload;
-	int skip_reload_params_compare;
 	dm_add_node_t add_node;
 	uint64_t existing_table_size;
 	int cookie_set;
--- a/device_mapper/libdm-common.c
+++ b/device_mapper/libdm-common.c
@@ -512,7 +512,7 @@ int unmangle_string(const char *str, const char *str_name, size_t len,
 	int strict = mode != DM_STRING_MANGLING_NONE;
 	char str_rest[DM_NAME_LEN];
 	size_t i, j;
-	unsigned int code;
+	int code;
 	int r = 0;

 	if (!str || !buf)
@@ -1445,7 +1445,7 @@ struct node_op_parms {
 	char *old_name;
 	int warn_if_udev_failed;
 	unsigned rely_on_udev;
-	char names[];
+	char names[0];
 };

 static void _store_str(char **pos, char **ptr, const char *str)
@@ -2012,8 +2012,7 @@ static int _sysfs_get_kernel_name(uint32_t major, uint32_t minor, char *buf, siz
 			log_sys_error("readlink", sysfs_path);
 		else {
 			log_sys_debug("readlink", sysfs_path);
-			r = _sysfs_find_kernel_name(major, minor, buf, buf_size);
-			goto out;
+			return _sysfs_find_kernel_name(major, minor, buf, buf_size);
 		}
 		goto bad;
 	}
@@ -2034,7 +2033,6 @@ static int _sysfs_get_kernel_name(uint32_t major, uint32_t minor, char *buf, siz
 	strcpy(buf, name);
 	r = 1;
 bad:
-out:
 	free(temp_buf);
 	free(sysfs_path);

--- a/device_mapper/libdm-deptree.c
+++ b/device_mapper/libdm-deptree.c
@@ -38,7 +38,6 @@ enum {
 	SEG_STRIPED,
 	SEG_ZERO,
 	SEG_WRITECACHE,
-	SEG_INTEGRITY,
 	SEG_THIN_POOL,
 	SEG_THIN,
 	SEG_VDO,
@@ -79,7 +78,6 @@ static const struct {
 	{ SEG_STRIPED, "striped" },
 	{ SEG_ZERO, "zero"},
 	{ SEG_WRITECACHE, "writecache"},
-	{ SEG_INTEGRITY, "integrity"},
 	{ SEG_THIN_POOL, "thin-pool"},
 	{ SEG_THIN, "thin"},
 	{ SEG_VDO, "vdo" },
@@ -223,11 +221,6 @@ struct load_segment {
 	int writecache_pmem;				/* writecache, 1 if pmem, 0 if ssd */
 	uint32_t writecache_block_size;			/* writecache, in bytes */
 	struct writecache_settings writecache_settings;	/* writecache */
-
-	uint64_t integrity_data_sectors;		/* integrity (provided_data_sectors) */
-	struct dm_tree_node *integrity_meta_node;	/* integrity */
-	struct integrity_settings integrity_settings;	/* integrity */
-	int integrity_recalculate;			/* integrity */
 };

 /* Per-device properties */
@@ -274,16 +267,6 @@ struct load_properties {
 	 */
 	unsigned delay_resume_if_extended;

-	/*
-	 * When comparing table lines to decide if a reload is
-	 * needed, ignore any differences betwen the lvm device
-	 * params and the kernel-reported device params.
-	 * dm-integrity reports many internal parameters on the
-	 * table line when lvm does not explicitly set them,
-	 * causing lvm and the kernel to have differing params.
-	 */
-	unsigned skip_reload_params_compare;
-
 	/*
 	 * Call node_send_messages(), set to 2 if there are messages
 	 * When != 0, it validates matching transaction id, thus thin-pools
@@ -1589,37 +1572,8 @@ static int _thin_pool_node_message(struct dm_tree_node *dnode, struct thin_messa
 	}

 	if (!_node_message(dnode->info.major, dnode->info.minor,
-			   tm->expected_errno, buf)) {
-		switch (m->type) {
-		case DM_THIN_MESSAGE_CREATE_SNAP:
-		case DM_THIN_MESSAGE_CREATE_THIN:
-			if (errno == EEXIST) {
-				/*
-				 * ATM errno from ioctl() is preserved through code error path chain
-				 * If this would ever change, another way need to be used to
-				 * obtain result from failed DM message
-				 */
-				log_error("Thin pool %s already contain thin device with device_id %u.",
-					  _node_name(dnode), m->u.m_create_snap.device_id);
-				/*
-				 * TODO:
-				 *
-				 * Give some useful advice how to solve this problem,
-				 * until lvconvert --repair can handle this automatically
-				 */
-				log_error("Manual intervention may be required to remove device dev_id=%u in thin pool metadata.",
-					  m->u.m_create_snap.device_id);
-				log_error("Optionally new thin volume with device_id=%u can be manually added into a volume group.",
-					  m->u.m_create_snap.device_id);
-				log_warn("WARNING: When uncertain how to do this, contact support!");
-				return 0;
-			}
-			/* fall through */
-		default:
-			return_0;
-		}
-
-	}
+			   tm->expected_errno, buf))
+		return_0;

 	return 1;
 }
@@ -1666,15 +1620,6 @@ static int _thin_pool_node_send_messages(struct dm_tree_node *dnode,
 	if (!have_messages || !send)
 		return 1; /* transaction_id is matching */

-	if (stp.fail || stp.read_only || stp.needs_check) {
-		log_error("Cannot send messages to thin pool %s%s%s%s.",
-			  _node_name(dnode),
-			  stp.fail ? " in failed state" : "",
-			  stp.read_only ? " with read only metadata" : "",
-			  stp.needs_check ? " which needs check first" : "");
-		return 0;
-	}
-
 	dm_list_iterate_items(tmsg, &seg->thin_messages) {
 		if (!(_thin_pool_node_message(dnode, tmsg)))
 			return_0;
@@ -2136,7 +2081,7 @@ int dm_tree_activate_children(struct dm_tree_node *dnode,
 	return r;
 }

-static int _create_node(struct dm_tree_node *dnode, struct dm_tree_node *parent)
+static int _create_node(struct dm_tree_node *dnode)
 {
 	int r = 0;
 	struct dm_task *dmt;
@@ -2185,15 +2130,38 @@ static int _create_node(struct dm_tree_node *dnode, struct dm_tree_node *parent)
 				  "Unable to get DM task info for %s.",
 				  dnode->name);
 	}
-
-	if (r)
-		dm_list_add_h(&parent->activated, &dnode->activated_list);
 out:
 	dm_task_destroy(dmt);

 	return r;
 }

+/*
+ * _remove_node
+ *
+ * This function is only used to remove a DM device that has failed
+ * to load any table.
+ */
+static int _remove_node(struct dm_tree_node *dnode)
+{
+	if (!dnode->info.exists)
+		return 1;
+
+	if (dnode->info.live_table || dnode->info.inactive_table) {
+		log_error(INTERNAL_ERROR
+			  "_remove_node called on device with loaded table(s).");
+		return 0;
+	}
+
+	if (!_deactivate_node(dnode->name, dnode->info.major, dnode->info.minor,
+			      &dnode->dtree->cookie, dnode->udev_flags, 0)) {
+		log_error("Failed to clean-up device with no table: %s.",
+			  _node_name(dnode));
+		return 0;
+	}
+	return 1;
+}
+
 static int _build_dev_string(char *devbuf, size_t bufsize, struct dm_tree_node *node)
 {
 	if (!dm_format_dev(devbuf, bufsize, node->info.major, node->info.minor)) {
@@ -2685,10 +2653,6 @@ static int _writecache_emit_segment_line(struct dm_task *dmt,
 		count += 1;
 	if (seg->writecache_settings.nofua_set)
 		count += 1;
-	if (seg->writecache_settings.cleaner_set && seg->writecache_settings.cleaner)
-		count += 1;
-	if (seg->writecache_settings.max_age_set)
-		count += 2;
 	if (seg->writecache_settings.new_key)
 		count += 2;

@@ -2732,14 +2696,6 @@ static int _writecache_emit_segment_line(struct dm_task *dmt,
 		EMIT_PARAMS(pos, " nofua");
 	}

-	if (seg->writecache_settings.cleaner_set && seg->writecache_settings.cleaner) {
-		EMIT_PARAMS(pos, " cleaner");
-	}
-
-	if (seg->writecache_settings.max_age_set) {
-		EMIT_PARAMS(pos, " max_age %u", seg->writecache_settings.max_age);
-	}
-
 	if (seg->writecache_settings.new_key) {
 		EMIT_PARAMS(pos, " %s %s",
 			seg->writecache_settings.new_key,
@@ -2749,84 +2705,6 @@ static int _writecache_emit_segment_line(struct dm_task *dmt,
 	return 1;
 }

-static int _integrity_emit_segment_line(struct dm_task *dmt,
-				    struct load_segment *seg,
-				    char *params, size_t paramsize)
-{
-	struct integrity_settings *set = &seg->integrity_settings;
-	int pos = 0;
-	int count;
-	char origin_dev[DM_FORMAT_DEV_BUFSIZE];
-	char meta_dev[DM_FORMAT_DEV_BUFSIZE];
-
-	if (!_build_dev_string(origin_dev, sizeof(origin_dev), seg->origin))
-		return_0;
-
-	if (seg->integrity_meta_node &&
-	    !_build_dev_string(meta_dev, sizeof(meta_dev), seg->integrity_meta_node))
-		return_0;
-
-	count = 3; /* block_size, internal_hash, fix_padding options are always passed */
-
-	if (seg->integrity_meta_node)
-		count++;
-
-	if (seg->integrity_recalculate)
-		count++;
-
-	if (set->journal_sectors_set)
-		count++;
-	if (set->interleave_sectors_set)
-		count++;
-	if (set->buffer_sectors_set)
-		count++;
-	if (set->journal_watermark_set)
-		count++;
-	if (set->commit_time_set)
-		count++;
-	if (set->bitmap_flush_interval_set)
-		count++;
-	if (set->sectors_per_bit_set)
-		count++;
-
-	EMIT_PARAMS(pos, "%s 0 %u %s %d fix_padding block_size:%u internal_hash:%s",
-		    origin_dev,
-		    set->tag_size,
-		    set->mode,
-		    count,
-		    set->block_size,
-		    set->internal_hash);
-
-	if (seg->integrity_meta_node)
-		EMIT_PARAMS(pos, " meta_device:%s", meta_dev);
-
-	if (seg->integrity_recalculate)
-		EMIT_PARAMS(pos, " recalculate");
-
-	if (set->journal_sectors_set)
-		EMIT_PARAMS(pos, " journal_sectors:%u", set->journal_sectors);
-
-	if (set->interleave_sectors_set)
-		EMIT_PARAMS(pos, " ineterleave_sectors:%u", set->interleave_sectors);
-
-	if (set->buffer_sectors_set)
-		EMIT_PARAMS(pos, " buffer_sectors:%u", set->buffer_sectors);
-
-	if (set->journal_watermark_set)
-		EMIT_PARAMS(pos, " journal_watermark:%u", set->journal_watermark);
-
-	if (set->commit_time_set)
-		EMIT_PARAMS(pos, " commit_time:%u", set->commit_time);
-
-	if (set->bitmap_flush_interval_set)
-		EMIT_PARAMS(pos, " bitmap_flush_interval:%u", set->bitmap_flush_interval);
-
-	if (set->sectors_per_bit_set)
-		EMIT_PARAMS(pos, " sectors_per_bit:%llu", (unsigned long long)set->sectors_per_bit);
-
-	return 1;
-}
-
 static int _thin_pool_emit_segment_line(struct dm_task *dmt,
 					struct load_segment *seg,
 					char *params, size_t paramsize)
@@ -2877,7 +2755,7 @@ static int _vdo_emit_segment_line(struct dm_task *dmt,
 		    "maxDiscard %u ack %u bio %u bioRotationInterval %u cpu %u hash %u logical %u physical %u",
 		    data_dev,
 		    seg->vdo_data_size / 8, // this parameter is in 4K units
-		    seg->vdo_params.minimum_io_size * UINT32_C(512), //  sector to byte units
+		    seg->vdo_params.minimum_io_size,
 		    seg->vdo_params.block_map_cache_size_mb * UINT64_C(256),	// 1MiB -> 4KiB units
 		    seg->vdo_params.block_map_era_length,
 		    seg->vdo_params.use_metadata_hints ? "on" : "off" ,
@@ -3011,10 +2889,6 @@ static int _emit_segment_line(struct dm_task *dmt, uint32_t major,
 		if (!_writecache_emit_segment_line(dmt, seg, params, paramsize))
 			return_0;
 		break;
-	case SEG_INTEGRITY:
-		if (!_integrity_emit_segment_line(dmt, seg, params, paramsize))
-			return_0;
-		break;
 	}

 	switch(seg->type) {
@@ -3027,7 +2901,6 @@ static int _emit_segment_line(struct dm_task *dmt, uint32_t major,
 	case SEG_THIN:
 	case SEG_CACHE:
 	case SEG_WRITECACHE:
-	case SEG_INTEGRITY:
 		break;
 	case SEG_CRYPT:
 	case SEG_LINEAR:
@@ -3132,9 +3005,6 @@ static int _load_node(struct dm_tree_node *dnode)
 	if (!dm_task_suppress_identical_reload(dmt))
 		log_warn("WARNING: Failed to suppress reload of identical tables.");

-	if (dnode->props.skip_reload_params_compare)
-		dm_task_skip_reload_params_compare(dmt);
-
 	if ((r = dm_task_run(dmt))) {
 		r = dm_task_get_info(dmt, &dnode->info);
 		if (r && !dnode->info.inactive_table)
@@ -3153,8 +3023,8 @@ static int _load_node(struct dm_tree_node *dnode)
 			if (!existing_table_size && dnode->props.delay_resume_if_new)
 				dnode->props.size_changed = 0;

-			log_debug_activation("Table size changed from %" PRIu64 " to %" PRIu64 " for %s.%s",
-					     existing_table_size,
+			log_debug_activation("Table size changed from %" PRIu64 " to %"
+					     PRIu64 " for %s.%s", existing_table_size,
 					     seg_start, _node_name(dnode),
 					     dnode->props.size_changed ? "" : " (Ignoring.)");

@@ -3206,16 +3076,6 @@ static int _dm_tree_revert_activated(struct dm_tree_node *parent)
 	return 1;
 }

-static int _dm_tree_wait_and_revert_activated(struct dm_tree_node *dnode)
-{
-	if (!dm_udev_wait(dm_tree_get_cookie(dnode)))
-		stack;
-
-	dm_tree_set_cookie(dnode, 0);
-
-	return _dm_tree_revert_activated(dnode);
-}
-
 int dm_tree_preload_children(struct dm_tree_node *dnode,
 			     const char *uuid_prefix,
 			     size_t uuid_prefix_len)
@@ -3245,7 +3105,7 @@ int dm_tree_preload_children(struct dm_tree_node *dnode,
 				return_0;

 		/* FIXME Cope if name exists with no uuid? */
-		if (!child->info.exists && !(node_created = _create_node(child, dnode)))
+		if (!child->info.exists && !(node_created = _create_node(child)))
 			return_0;

 		/* Propagate delayed resume from exteded child node */
@@ -3255,22 +3115,28 @@ int dm_tree_preload_children(struct dm_tree_node *dnode,
 		if (!child->info.inactive_table &&
 		    child->props.segment_count &&
 		    !_load_node(child)) {
-			stack;
 			/*
-			 * If the table load fails, try to device in the kernel
-			 * together with other created and preloaded devices.
+			 * If the table load does not succeed, we remove the
+			 * device in the kernel that would otherwise have an
+			 * empty table.  This makes the create + load of the
+			 * device atomic.  However, if other dependencies have
+			 * already been created and loaded; this code is
+			 * insufficient to remove those - only the node
+			 * encountering the table load failure is removed.
 			 */
-			if (!_dm_tree_wait_and_revert_activated(dnode))
-				stack;
-			r = 0;
-			continue;
+			if (node_created) {
+				if (!_remove_node(child))
+					return_0;
+				if (!dm_udev_wait(dm_tree_get_cookie(dnode)))
+					stack;
+				dm_tree_set_cookie(dnode, 0);
+				(void) _dm_tree_revert_activated(child);
+			}
+			return_0;
 		}

 		/* No resume for a device without parents or with unchanged or smaller size */
-		if (!dm_tree_node_num_children(child, 1))
-			continue;
-
-		if (child->props.size_changed <= 0)
+		if (!dm_tree_node_num_children(child, 1) || (child->props.size_changed <= 0))
 			continue;

 		if (!child->info.inactive_table && !child->info.suspended)
@@ -3281,19 +3147,28 @@ int dm_tree_preload_children(struct dm_tree_node *dnode,
 				  &child->info, &child->dtree->cookie, child->udev_flags,
 				  child->info.suspended)) {
 			log_error("Unable to resume %s.", _node_name(child));
-			if (!_dm_tree_wait_and_revert_activated(dnode))
-				stack;
+			/* If the device was not previously active, we might as well remove this node. */
+			if (!child->info.live_table &&
+			    !_deactivate_node(child->name, child->info.major, child->info.minor,
+					      &child->dtree->cookie, child->udev_flags, 0))
+				log_error("Unable to deactivate %s.", _node_name(child));
 			r = 0;
+			/* Each child is handled independently */
 			continue;
 		}

 		if (node_created) {
+			/* Collect newly introduced devices for revert */
+			dm_list_add_h(&dnode->activated, &child->activated_list);
+
 			/* When creating new node also check transaction_id. */
 			if (child->props.send_messages &&
 			    !_node_send_messages(child, uuid_prefix, uuid_prefix_len, 0)) {
 				stack;
-				if (!_dm_tree_wait_and_revert_activated(dnode))
+				if (!dm_udev_wait(dm_tree_get_cookie(dnode)))
 					stack;
+				dm_tree_set_cookie(dnode, 0);
+				(void) _dm_tree_revert_activated(dnode);
 				r = 0;
 				continue;
 			}
@@ -3863,48 +3738,6 @@ int dm_tree_node_add_writecache_target(struct dm_tree_node *node,
 	return 1;
 }

-int dm_tree_node_add_integrity_target(struct dm_tree_node *node,
-				  uint64_t size,
-				  const char *origin_uuid,
-				  const char *meta_uuid,
-				  struct integrity_settings *settings,
-				  int recalculate)
-{
-	struct load_segment *seg;
-
-	if (!(seg = _add_segment(node, SEG_INTEGRITY, size)))
-		return_0;
-
-	if (!meta_uuid) {
-		log_error("No integrity meta uuid.");
-		return 0;
-	}
-
-	if (!(seg->integrity_meta_node = dm_tree_find_node_by_uuid(node->dtree, meta_uuid))) {
-		log_error("Missing integrity's meta uuid %s.", meta_uuid);
-		return 0;
-	}
-
-	if (!_link_tree_nodes(node, seg->integrity_meta_node))
-		return_0;
-
-	if (!(seg->origin = dm_tree_find_node_by_uuid(node->dtree, origin_uuid))) {
-		log_error("Missing integrity's origin uuid %s.", origin_uuid);
-		return 0;
-	}
-
-	if (!_link_tree_nodes(node, seg->origin))
-		return_0;
-
-	memcpy(&seg->integrity_settings, settings, sizeof(struct integrity_settings));
-
-	seg->integrity_recalculate = recalculate;
-
-	node->props.skip_reload_params_compare = 1;
-
-	return 1;
-}
-
 int dm_tree_node_add_replicator_target(struct dm_tree_node *node,
 				       uint64_t size,
 				       const char *rlog_uuid,
@@ -4367,7 +4200,6 @@ int dm_tree_node_add_cache_target_base(struct dm_tree_node *node,

 int dm_tree_node_add_vdo_target(struct dm_tree_node *node,
 				uint64_t size,
-				const char *vdo_pool_name,
 				const char *data_uuid,
 				uint64_t data_size,
 				const struct dm_vdo_target_params *vtp)
@@ -4389,7 +4221,7 @@ int dm_tree_node_add_vdo_target(struct dm_tree_node *node,
 		return_0;

 	seg->vdo_params = *vtp;
-	seg->vdo_name = vdo_pool_name;
+	seg->vdo_name = node->name;
 	seg->vdo_data_size = data_size;

 	node->props.send_messages = 2;
--- a/device_mapper/libdm-report.c
+++ b/device_mapper/libdm-report.c
@@ -749,11 +749,10 @@ static void _display_fields_more(struct dm_report *rh,
 			id_len = strlen(type->prefix) + 3;

 	for (f = 0; fields[f].report_fn; f++) {
-		if (!(type = _find_type(rh, fields[f].type))) {
-			log_debug(INTERNAL_ERROR "Field type undefined.");
-			continue;
-		}
-		desc = (type->desc) ? : " ";
+		if ((type = _find_type(rh, fields[f].type)) && type->desc)
+			desc = type->desc;
+		else
+			desc = " ";
 		if (desc != last_desc) {
 			if (*last_desc)
 				log_warn(" ");
--- a/device_mapper/libdm-targets.c
+++ b/device_mapper/libdm-targets.c
@@ -366,8 +366,8 @@ int dm_get_status_writecache(struct dm_pool *mem, const char *params,
 	if (!(s = dm_pool_zalloc(mem, sizeof(struct dm_status_writecache))))
 		return_0;

-	if (sscanf(params, "%llu %llu %llu %llu",
-		   (unsigned long long *)&s->error,
+	if (sscanf(params, "%u %llu %llu %llu",
+		   &s->error,
 		   (unsigned long long *)&s->total_blocks,
 		   (unsigned long long *)&s->free_blocks,
 		   (unsigned long long *)&s->writeback_blocks) != 4) {
@@ -380,33 +380,6 @@ int dm_get_status_writecache(struct dm_pool *mem, const char *params,
 	return 1;
 }

-int dm_get_status_integrity(struct dm_pool *mem, const char *params,
-			     struct dm_status_integrity **status)
-{
-	struct dm_status_integrity *s;
-	char recalc_str[16] = "\0";
-
-	if (!(s = dm_pool_zalloc(mem, sizeof(*s))))
-		return_0;
-
-	if (sscanf(params, "%llu %llu %s",
-		   (unsigned long long *)&s->number_of_mismatches,
-		   (unsigned long long *)&s->provided_data_sectors,
-		   recalc_str) != 3) {
-		log_error("Failed to parse integrity params: %s.", params);
-		dm_pool_free(mem, s);
-		return 0;
-	}
-
-	if (recalc_str[0] == '-')
-		s->recalc_sector = 0;
-	else
-		s->recalc_sector = strtoull(recalc_str, NULL, 0);
-
-	*status = s;
-	return 1;
-}
-
 int parse_thin_pool_status(const char *params, struct dm_status_thin_pool *s)
 {
 	int pos;
--- a/device_mapper/misc/dm-ioctl.h
+++ b/device_mapper/misc/dm-ioctl.h
@@ -183,7 +183,7 @@ struct dm_target_spec {
 struct dm_target_deps {
 	uint32_t count;	/* Array size */
 	uint32_t padding;	/* unused */
-	uint64_t dev[];		/* out */
+	uint64_t dev[0];	/* out */
 };

 /*
@@ -193,7 +193,7 @@ struct dm_name_list {
 	uint64_t dev;
 	uint32_t next;		/* offset to the next record from
 				   the _start_ of this */
-	char name[];
+	char name[0];
 };

 /*
@@ -203,7 +203,7 @@ struct dm_target_versions {
        uint32_t next;
        uint32_t version[3];

-        char name[];
+        char name[0];
 };

 /*
@@ -212,7 +212,7 @@ struct dm_target_versions {
 struct dm_target_msg {
 	uint64_t sector;	/* Device sector */

-	char message[];
+	char message[0];
 };

 /*
@@ -244,7 +244,6 @@ enum {
 	DM_TARGET_MSG_CMD,
 	DM_DEV_SET_GEOMETRY_CMD,
 	DM_DEV_ARM_POLL_CMD,
-	DM_GET_TARGET_VERSION_CMD,
 };

 #define DM_IOCTL 0xfd
@@ -271,8 +270,6 @@ enum {
 #define DM_TARGET_MSG	 _IOWR(DM_IOCTL, DM_TARGET_MSG_CMD, struct dm_ioctl)
 #define DM_DEV_SET_GEOMETRY	_IOWR(DM_IOCTL, DM_DEV_SET_GEOMETRY_CMD, struct dm_ioctl)

-#define DM_GET_TARGET_VERSION	_IOWR(DM_IOCTL, DM_GET_TARGET_VERSION_CMD, struct dm_ioctl)
-
 #define DM_VERSION_MAJOR	4
 #define DM_VERSION_MINOR	36
 #define DM_VERSION_PATCHLEVEL	0
--- a/device_mapper/mm/pool.c
+++ b/device_mapper/mm/pool.c
@@ -98,7 +98,7 @@ void dm_pools_check_leaks(void)
 			  p->orig_pool,
 			  p->name, p->stats.bytes);
 #else
-		log_error(" [%p] %s", (void *)p, p->name);
+		log_error(" [%p] %s", p, p->name);
 #endif
 	}
 	pthread_mutex_unlock(&_dm_pools_mutex);
--- a/device_mapper/vdo/target.h
+++ b/device_mapper/vdo/target.h
@@ -74,7 +74,7 @@ enum dm_vdo_write_policy {

 // FIXME: review whether we should use the createParams from the userlib
 struct dm_vdo_target_params {
-	uint32_t minimum_io_size;       // in sectors
+	uint32_t minimum_io_size;
 	uint32_t block_map_cache_size_mb;
 	uint32_t block_map_era_length;	// format period

--- a/device_mapper/vdo/vdo_target.c
+++ b/device_mapper/vdo/vdo_target.c
@@ -23,9 +23,8 @@ bool dm_vdo_validate_target_params(const struct dm_vdo_target_params *vtp,
 {
 	bool valid = true;

-	/* 512 or 4096 bytes only ATM */
-	if ((vtp->minimum_io_size != 1) &&
-	    (vtp->minimum_io_size != 8)) {
+	if ((vtp->minimum_io_size != 512) &&
+	    (vtp->minimum_io_size != 4096)) {
 		log_error("VDO minimum io size %u is unsupported.",
 			  vtp->minimum_io_size);
 		valid = false;
--- a/include/configure.h.in
+++ b/include/configure.h.in
@@ -126,9 +126,6 @@
 /* Library version */
 #undef DM_LIB_VERSION

-/* Define to 1 to include the LVM editline shell. */
-#undef EDITLINE_SUPPORT
-
 /* Path to fsadm binary. */
 #undef FSADM_PATH

@@ -154,9 +151,6 @@
 /* Define to 1 if you have the `atexit' function. */
 #undef HAVE_ATEXIT

-/* Define if ioctl BLKZEROOUT can be used for device zeroing. */
-#undef HAVE_BLKZEROOUT
-
 /* Define to 1 if canonicalize_file_name is available. */
 #undef HAVE_CANONICALIZE_FILE_NAME

@@ -182,12 +176,6 @@
 /* Define to 1 if you don't have `vprintf' but do have `_doprnt.' */
 #undef HAVE_DOPRNT

-/* Define to 1 if you have the <editline/history.h> header file. */
-#undef HAVE_EDITLINE_HISTORY_H
-
-/* Define to 1 if you have the <editline/readline.h> header file. */
-#undef HAVE_EDITLINE_READLINE_H
-
 /* Define to 1 if you have the <errno.h> header file. */
 #undef HAVE_ERRNO_H

@@ -543,9 +531,6 @@
 /* Define to 1 if the system has the `__builtin_clzll' built-in function */
 #undef HAVE___BUILTIN_CLZLL

-/* Define to 1 to include built-in support for integrity. */
-#undef INTEGRITY_INTERNAL
-
 /* Internalization package */
 #undef INTL_PACKAGE

--- a/lib/Makefile.in
+++ b/lib/Makefile.in
@@ -20,7 +20,6 @@ SOURCES =\
 	activate/activate.c \
 	cache/lvmcache.c \
 	writecache/writecache.c \
-	integrity/integrity.c \
 	cache_segtype/cache.c \
 	commands/toolcontext.c \
 	config/config.c \
@@ -37,6 +36,9 @@ SOURCES =\
 	device/dev-luks.c \
 	device/dev-dasd.c \
 	device/dev-lvm1-pool.c \
+	device/io-manager.c \
+	device/io-manager-utils.c \
+	device/io-processor.c \
 	display/display.c \
 	error/errseg.c \
 	unknown/unknown.c \
@@ -67,8 +69,6 @@ SOURCES =\
 	locking/locking.c \
 	log/log.c \
 	metadata/cache_manip.c \
-	metadata/writecache_manip.c \
-	metadata/integrity_manip.c \
 	metadata/lv.c \
 	metadata/lv_manip.c \
 	metadata/merge.c \
@@ -76,7 +76,6 @@ SOURCES =\
 	metadata/mirror.c \
 	metadata/pool_manip.c \
 	metadata/pv.c \
-	metadata/pv_list.c \
 	metadata/pv_manip.c \
 	metadata/pv_map.c \
 	metadata/raid_manip.c \
--- a/lib/activate/activate.c
+++ b/lib/activate/activate.c
@@ -185,8 +185,8 @@ void set_activation(int act, int silent)
 	if (warned || !act)
 		return;

-	log_warn("WARNING: Compiled without libdevmapper support. "
-		 "Can't enable activation.");
+	log_error("Compiled without libdevmapper support. "
+		  "Can't enable activation.");

 	warned = 1;
 }
@@ -221,13 +221,23 @@ int lv_info(struct cmd_context *cmd, const struct logical_volume *lv, int use_la
 {
 	return 0;
 }
-int lv_info_with_seg_status(struct cmd_context *cmd,
-			    const struct lv_segment *lv_seg,
+int lv_info_by_lvid(struct cmd_context *cmd, const char *lvid_s, int use_layer,
+		    struct lvinfo *info, int with_open_count, int with_read_ahead)
+{
+	return 0;
+}
+int lv_info_with_seg_status(struct cmd_context *cmd, const struct logical_volume *lv,
+			    const struct lv_segment *lv_seg, int use_layer,
 			    struct lv_with_info_and_seg_status *status,
 			    int with_open_count, int with_read_ahead)
 {
 	return 0;
 }
+int lv_status(struct cmd_context *cmd, const struct lv_segment *lv_seg,
+	      int use_layer, struct lv_seg_status *lv_seg_status)
+{
+	return 0;
+}
 int lv_cache_status(const struct logical_volume *cache_lv,
 		    struct lv_status_cache **status)
 {
@@ -274,17 +284,18 @@ int lv_raid_message(const struct logical_volume *lv, const char *msg)
 {
 	return 0;
 }
-int lv_writecache_message(const struct logical_volume *lv, const char *msg)
+int lv_thin_pool_percent(const struct logical_volume *lv, int metadata,
+			 dm_percent_t *percent)
 {
 	return 0;
 }
-int lv_thin_pool_status(const struct logical_volume *lv, int flush,
-			struct lv_status_thin_pool **thin_pool_status)
+int lv_thin_percent(const struct logical_volume *lv, int mapped,
+		    dm_percent_t *percent)
 {
 	return 0;
 }
-int lv_thin_status(const struct logical_volume *lv, int flush,
-		   struct lv_status_thin **thin_status)
+int lv_thin_pool_transaction_id(const struct logical_volume *lv,
+				uint64_t *transaction_id)
 {
 	return 0;
 }
@@ -292,15 +303,6 @@ int lv_thin_device_id(const struct logical_volume *lv, uint32_t *device_id)
 {
 	return 0;
 }
-int lv_vdo_pool_status(const struct logical_volume *lv, int flush,
-		       struct lv_status_vdo **vdo_status)
-{
-	return 0;
-}
-int lv_vdo_pool_percent(const struct logical_volume *lv, dm_percent_t *percent)
-{
-	return 0;
-}
 int lvs_in_vg_activated(const struct volume_group *vg)
 {
 	return 0;
@@ -618,7 +620,7 @@ static int _lv_info(struct cmd_context *cmd, const struct logical_volume *lv,
 		    int use_layer, struct lvinfo *info,
 		    const struct lv_segment *seg,
 		    struct lv_seg_status *seg_status,
-		    int with_open_count, int with_read_ahead, int with_name_check)
+		    int with_open_count, int with_read_ahead)
 {
 	struct dm_info dminfo;

@@ -636,7 +638,7 @@ static int _lv_info(struct cmd_context *cmd, const struct logical_volume *lv,
 	/* New thin-pool has no layer, but -tpool suffix needs to be queried */
 	if (!use_layer && lv_is_new_thin_pool(lv)) {
 		/* Check if there isn't existing old thin pool mapping in the table */
-		if (!dev_manager_info(cmd, lv, NULL, 0, 0, 0, &dminfo, NULL, NULL))
+		if (!dev_manager_info(cmd, lv, NULL, 0, 0, &dminfo, NULL, NULL))
 			return_0;
 		if (!dminfo.exists)
 			use_layer = 1;
@@ -649,9 +651,8 @@ static int _lv_info(struct cmd_context *cmd, const struct logical_volume *lv,

 	if (!dev_manager_info(cmd, lv,
 			      (use_layer) ? lv_layer(lv) : NULL,
-			      with_open_count, with_read_ahead, with_name_check,
-			      &dminfo,
-			      (info) ? &info->read_ahead : NULL,
+			      with_open_count, with_read_ahead,
+			      &dminfo, (info) ? &info->read_ahead : NULL,
 			      seg_status))
 		return_0;

@@ -680,16 +681,7 @@ int lv_info(struct cmd_context *cmd, const struct logical_volume *lv, int use_la
 	if (!activation())
 		return 0;

-	return _lv_info(cmd, lv, use_layer, info, NULL, NULL, with_open_count, with_read_ahead, 0);
-}
-
-int lv_info_with_name_check(struct cmd_context *cmd, const struct logical_volume *lv,
-			    int use_layer, struct lvinfo *info)
-{
-	if (!activation())
-		return 0;
-
-	return _lv_info(cmd, lv, use_layer, info, NULL, NULL, 0, 0, 1);
+	return _lv_info(cmd, lv, use_layer, info, NULL, NULL, with_open_count, with_read_ahead);
 }

 /*
@@ -719,16 +711,16 @@ int lv_info_with_seg_status(struct cmd_context *cmd,
 		 * STATUS is collected from cache LV */
 		if (!(lv_seg = get_only_segment_using_this_lv(lv)))
 			return_0;
-		(void) _lv_info(cmd, lv_seg->lv, 1, NULL, lv_seg, &status->seg_status, 0, 0, 0);
+		(void) _lv_info(cmd, lv_seg->lv, 1, NULL, lv_seg, &status->seg_status, 0, 0);
 		return 1;
 	}

 	if (lv_is_thin_pool(lv)) {
 		/* Always collect status for '-tpool' */
-		if (_lv_info(cmd, lv, 1, &status->info, lv_seg, &status->seg_status, 0, 0, 0) &&
+		if (_lv_info(cmd, lv, 1, &status->info, lv_seg, &status->seg_status, 0, 0) &&
 		    (status->seg_status.type == SEG_STATUS_THIN_POOL)) {
 			/* There is -tpool device, but query 'active' state of 'fake' thin-pool */
-			if (!_lv_info(cmd, lv, 0, NULL, NULL, NULL, 0, 0, 0) &&
+			if (!_lv_info(cmd, lv, 0, NULL, NULL, NULL, 0, 0) &&
 			    !status->seg_status.thin_pool->needs_check)
 				status->info.exists = 0; /* So pool LV is not active */
 		}
@@ -737,10 +729,10 @@ int lv_info_with_seg_status(struct cmd_context *cmd,

 	if (lv_is_external_origin(lv)) {
 		if (!_lv_info(cmd, lv, 0, &status->info, NULL, NULL,
-			      with_open_count, with_read_ahead, 0))
+			      with_open_count, with_read_ahead))
 			return_0;

-		(void) _lv_info(cmd, lv, 1, NULL, lv_seg, &status->seg_status, 0, 0, 0);
+		(void) _lv_info(cmd, lv, 1, NULL, lv_seg, &status->seg_status, 0, 0);
 		return 1;
 	}

@@ -753,13 +745,13 @@ int lv_info_with_seg_status(struct cmd_context *cmd,
 		/* Show INFO for actual origin and grab status for merging origin */
 		if (!_lv_info(cmd, lv, 0, &status->info, lv_seg,
 			      lv_is_merging_origin(lv) ? &status->seg_status : NULL,
-			      with_open_count, with_read_ahead, 0))
+			      with_open_count, with_read_ahead))
 			return_0;

 		if (status->info.exists &&
 		    (status->seg_status.type != SEG_STATUS_SNAPSHOT)) /* Not merging */
 			/* Grab STATUS from layered -real */
-			(void) _lv_info(cmd, lv, 1, NULL, lv_seg, &status->seg_status, 0, 0, 0);
+			(void) _lv_info(cmd, lv, 1, NULL, lv_seg, &status->seg_status, 0, 0);
 		return 1;
 	}

@@ -768,11 +760,10 @@ int lv_info_with_seg_status(struct cmd_context *cmd,
 			olv = origin_from_cow(lv);

 			if (!_lv_info(cmd, olv, 0, &status->info, first_seg(olv), &status->seg_status,
-				      with_open_count, with_read_ahead, 0))
+				      with_open_count, with_read_ahead))
 				return_0;

-			if (status->seg_status.type == SEG_STATUS_SNAPSHOT ||
-			    (lv_is_thin_volume(olv) && (status->seg_status.type == SEG_STATUS_THIN))) {
+			if (status->seg_status.type == SEG_STATUS_SNAPSHOT) {
 				log_debug_activation("Snapshot merge is in progress, querying status of %s instead.",
 						     display_lvname(lv));
 				/*
@@ -790,33 +781,21 @@ int lv_info_with_seg_status(struct cmd_context *cmd,

 	if (lv_is_vdo(lv)) {
 		if (!_lv_info(cmd, lv, 0, &status->info, NULL, NULL,
-			      with_open_count, with_read_ahead, 0))
+			      with_open_count, with_read_ahead))
 			return_0;
 		if (status->info.exists) {
 			/* Status for VDO pool */
 			(void) _lv_info(cmd, seg_lv(lv_seg, 0), 1, NULL,
 					first_seg(seg_lv(lv_seg, 0)),
-					&status->seg_status, 0, 0, 0);
+					&status->seg_status, 0, 0);
 			/* Use VDO pool segtype result for VDO segtype */
 			status->seg_status.seg = lv_seg;
 		}
 		return 1;
 	}

-	if (lv_is_vdo_pool(lv)) {
-		/* Always collect status for '-vpool' */
-		if (_lv_info(cmd, lv, 1, &status->info, lv_seg, &status->seg_status, 0, 0, 0) &&
-		    (status->seg_status.type == SEG_STATUS_VDO_POOL)) {
-			/* There is -tpool device, but query 'active' state of 'fake' vdo-pool */
-			if (!_lv_info(cmd, lv, 0, NULL, NULL, NULL, 0, 0, 0))
-				status->info.exists = 0; /* So VDO pool LV is not active */
-		}
-
-		return 1;
-	}
-
 	return _lv_info(cmd, lv, 0, &status->info, lv_seg, &status->seg_status,
-			with_open_count, with_read_ahead, 0);
+			with_open_count, with_read_ahead);
 }

 #define OPEN_COUNT_CHECK_RETRIES 25
@@ -1246,52 +1225,86 @@ int lv_cache_status(const struct logical_volume *cache_lv,
 	return 1;
 }

-int lv_thin_pool_status(const struct logical_volume *lv, int flush,
-			struct lv_status_thin_pool **thin_pool_status)
+/*
+ * Returns data or metadata percent usage, depends on metadata 0/1.
+ * Returns 1 if percent set, else 0 on failure.
+ */
+int lv_thin_pool_percent(const struct logical_volume *lv, int metadata,
+			 dm_percent_t *percent)
 {
+	int r;
 	struct dev_manager *dm;

 	if (!lv_info(lv->vg->cmd, lv, 1, NULL, 0, 0))
 		return 0;

-	log_debug_activation("Checking thin pool status for LV %s.",
-			     display_lvname(lv));
+	log_debug_activation("Checking thin %sdata percent for LV %s.",
+			     (metadata) ? "meta" : "", display_lvname(lv));

 	if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
 		return_0;

-	if (!dev_manager_thin_pool_status(dm, lv, flush, thin_pool_status)) {
-		dev_manager_destroy(dm);
-		return_0;
-	}
+	if (!(r = dev_manager_thin_pool_percent(dm, lv, metadata, percent)))
+		stack;

-	/* User has to call dm_pool_destroy(thin_pool_status->mem)! */
+	dev_manager_destroy(dm);

-	return 1;
+	return r;
 }

-int lv_thin_status(const struct logical_volume *lv, int flush,
-		   struct lv_status_thin **thin_status)
+/*
+ * Returns 1 if percent set, else 0 on failure.
+ */
+int lv_thin_percent(const struct logical_volume *lv,
+		    int mapped, dm_percent_t *percent)
 {
+	int r;
 	struct dev_manager *dm;

 	if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0))
 		return 0;

-	log_debug_activation("Checking thin status for LV %s.",
+	log_debug_activation("Checking thin percent for LV %s.",
 			     display_lvname(lv));

 	if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
 		return_0;

-	if (!dev_manager_thin_status(dm, lv, flush, thin_status)) {
-		dev_manager_destroy(dm);
+	if (!(r = dev_manager_thin_percent(dm, lv, mapped, percent)))
+		stack;
+
+	dev_manager_destroy(dm);
+
+	return r;
+}
+
+/*
+ * Returns 1 if transaction_id set, else 0 on failure.
+ */
+int lv_thin_pool_transaction_id(const struct logical_volume *lv,
+				uint64_t *transaction_id)
+{
+	int r;
+	struct dev_manager *dm;
+	struct dm_status_thin_pool *status;
+
+	if (!lv_info(lv->vg->cmd, lv, 1, NULL, 0, 0))
+		return 0;
+
+	log_debug_activation("Checking thin-pool transaction id for LV %s.",
+			     display_lvname(lv));
+
+	if (!(dm = dev_manager_create(lv->vg->cmd, lv->vg->name, 1)))
 		return_0;
-	}

-	/* User has to call dm_pool_destroy(thin_status->mem)! */
+	if (!(r = dev_manager_thin_pool_status(dm, lv, &status, 0)))
+		stack;
+	else
+		*transaction_id = status->transaction_id;

-	return 1;
+	dev_manager_destroy(dm);
+
+	return r;
 }

 int lv_thin_device_id(const struct logical_volume *lv, uint32_t *device_id)
@@ -1329,7 +1342,7 @@ int lv_vdo_pool_status(const struct logical_volume *lv, int flush,
 	int r = 0;
 	struct dev_manager *dm;

-	if (!lv_info(lv->vg->cmd, lv, 1, NULL, 0, 0))
+	if (!lv_info(lv->vg->cmd, lv, 0, NULL, 0, 0))
 		return 0;

 	log_debug_activation("Checking VDO pool status for LV %s.",
@@ -1579,8 +1592,6 @@ static char *_build_target_uuid(struct cmd_context *cmd, const struct logical_vo

 	if (lv_is_thin_pool(lv))
 		layer = "tpool"; /* Monitor "tpool" for the "thin pool". */
-	else if (lv_is_vdo_pool(lv))
-		layer = "vpool"; /* Monitor "vpool" for the "VDO pool". */
 	else if (lv_is_origin(lv) || lv_is_external_origin(lv))
 		layer = "real"; /* Monitor "real" for "snapshot-origin". */
 	else
@@ -2161,6 +2172,8 @@ static int _lv_suspend(struct cmd_context *cmd, const char *lvid_s,
 	if (laopts->origin_only && lv_is_thin_volume(lv) && lv_is_thin_volume(lv_pre))
 		lockfs = 1;

+	critical_section_inc(cmd, "suspending");
+
 	if (!lv_is_locked(lv) && lv_is_locked(lv_pre) &&
 	    (pvmove_lv = find_pvmove_lv_in_lv(lv_pre))) {
 		/*
@@ -2202,23 +2215,16 @@ static int _lv_suspend(struct cmd_context *cmd, const char *lvid_s,
 			}
 			dm_list_add(&suspend_lvs, &lvl->list);
 		}
-
-		critical_section_inc(cmd, "suspending");
-
 		dm_list_iterate_items(lvl, &suspend_lvs)
 			if (!_lv_suspend_lv(lvl->lv, laopts, lockfs, 1)) {
 				critical_section_dec(cmd, "failed suspend");
 				goto_out; /* FIXME: resume on recovery path? */
 			}
-
-	} else { /* Standard suspend */
-		critical_section_inc(cmd, "suspending");
-
+	} else  /* Standard suspend */
 		if (!_lv_suspend_lv(lv, laopts, lockfs, flush_required)) {
 			critical_section_dec(cmd, "failed suspend");
 			goto_out;
 		}
-	}

 	r = 1;
 out:
@@ -2238,8 +2244,8 @@ int lv_suspend_if_active(struct cmd_context *cmd, const char *lvid_s, unsigned o
 			 const struct logical_volume *lv, const struct logical_volume *lv_pre)
 {
 	struct lv_activate_opts laopts = {
-		.exclusive = exclusive,
-		.origin_only = origin_only
+		.origin_only = origin_only,
+		.exclusive = exclusive
 	};

 	return _lv_suspend(cmd, lvid_s, &laopts, 0, lv, lv_pre);
@@ -2291,9 +2297,6 @@ static int _lv_resume(struct cmd_context *cmd, const char *lvid_s,
 			      lv_is_thin_volume(lv) ? " thin only" : " without snapshots") : "",
 			     laopts->revert ? " (reverting)" : "");

-	if (laopts->revert)
-		goto needs_resume;
-
 	if (!lv_info(cmd, lv, laopts->origin_only, &info, 0, 0))
 		goto_out;

@@ -2353,8 +2356,8 @@ int lv_resume_if_active(struct cmd_context *cmd, const char *lvid_s,
 			unsigned revert, const struct logical_volume *lv)
 {
 	struct lv_activate_opts laopts = {
-		.exclusive = exclusive,
 		.origin_only = origin_only,
+		.exclusive = exclusive,
 		.revert = revert
 	};

@@ -2419,17 +2422,6 @@ int lv_deactivate(struct cmd_context *cmd, const char *lvid_s, const struct logi
 			}
 		}

-		if (lv_is_vdo_pool(lv)) {
-			/* If someone has remove 'linear' mapping over VDO device
-			 * we may still be able to deactivate the rest of the tree
-			 * i.e. in test-suite we simulate this via 'dmsetup remove' */
-			if (!lv_info(cmd, lv, 1, &info, 1, 0))
-				goto_out;
-
-			if (info.exists && !info.open_count)
-				r = 0; /* Unused VDO device left in table? */
-		}
-
 		if (r)
 			goto out;
 	}
@@ -2507,13 +2499,6 @@ static int _lv_activate(struct cmd_context *cmd, const char *lvid_s,
 		goto out;
 	}

-	if ((cmd->partial_activation || cmd->degraded_activation) &&
-	    lv_is_partial(lv) && lv_is_raid(lv) && lv_raid_has_integrity((struct logical_volume *)lv)) {
-		cmd->partial_activation = 0;
-		cmd->degraded_activation = 0;
-		log_print("No degraded or partial activation for raid with integrity.");
-	}
-
 	if ((!lv->vg->cmd->partial_activation) && lv_is_partial(lv)) {
 		if (!lv_is_raid_type(lv) || !partial_raid_lv_supports_degraded_activation(lv)) {
 			log_error("Refusing activation of partial LV %s.  "
@@ -2530,14 +2515,6 @@ static int _lv_activate(struct cmd_context *cmd, const char *lvid_s,
 		}
 	}

-	if ((cmd->partial_activation || cmd->degraded_activation) && lv_is_writecache(lv)) {
-		struct logical_volume *lv_fast = first_seg(lv)->writecache;
-		if (lv_is_partial(lv) || (lv_fast && lv_is_partial(lv_fast))) {
-			log_error("Cannot use partial or degraded activation with writecache.");
-			goto out;
-		}
-	}
-
 	if (lv_has_unknown_segments(lv)) {
 		log_error("Refusing activation of LV %s containing "
 			  "an unrecognised segment.", display_lvname(lv));
@@ -2570,7 +2547,7 @@ static int _lv_activate(struct cmd_context *cmd, const char *lvid_s,
 			     laopts->noscan ? " noscan" : "",
 			     laopts->temporary ? " temporary" : "");

-	if (!lv_info_with_name_check(cmd, lv, 0, &info))
+	if (!lv_info(cmd, lv, 0, &info, 0, 0))
 		goto_out;

 	/*
@@ -2942,7 +2919,8 @@ int revert_lv(struct cmd_context *cmd, const struct logical_volume *lv)

 	ret = lv_resume_if_active(cmd, NULL, 0, 0, 1, lv_committed(lv));

-	critical_section_dec(cmd, "unlocking on revert");
+	critical_section_dec(cmd, "unlocking on resume");

 	return ret;
 }
+
--- a/lib/activate/activate.h
+++ b/lib/activate/activate.h
@@ -39,7 +39,6 @@ typedef enum {
 	SEG_STATUS_THIN_POOL,
 	SEG_STATUS_VDO_POOL,
 	SEG_STATUS_WRITECACHE,
-	SEG_STATUS_INTEGRITY,
 	SEG_STATUS_UNKNOWN
 } lv_seg_status_type_t;

@@ -54,7 +53,6 @@ struct lv_seg_status {
 		struct dm_status_thin *thin;
 		struct dm_status_thin_pool *thin_pool;
 		struct dm_status_writecache *writecache;
-		struct dm_status_integrity *integrity;
 		struct lv_status_vdo vdo_pool;
 	};
 };
@@ -146,8 +144,8 @@ int revert_lv(struct cmd_context *cmd, const struct logical_volume *lv);
 */
 int lv_info(struct cmd_context *cmd, const struct logical_volume *lv, int use_layer,
 	    struct lvinfo *info, int with_open_count, int with_read_ahead);
-int lv_info_with_name_check(struct cmd_context *cmd, const struct logical_volume *lv,
-			    int use_layer, struct lvinfo *info);
+int lv_info_by_lvid(struct cmd_context *cmd, const char *lvid_s, int use_layer,
+		    struct lvinfo *info, int with_open_count, int with_read_ahead);

 /*
 * Returns 1 if lv_info_and_seg_status structure has been populated,
@@ -191,11 +189,13 @@ int lv_raid_message(const struct logical_volume *lv, const char *msg);
 int lv_writecache_message(const struct logical_volume *lv, const char *msg);
 int lv_cache_status(const struct logical_volume *cache_lv,
 		    struct lv_status_cache **status);
+int lv_thin_pool_percent(const struct logical_volume *lv, int metadata,
+			 dm_percent_t *percent);
+int lv_thin_percent(const struct logical_volume *lv, int mapped,
+		    dm_percent_t *percent);
+int lv_thin_pool_transaction_id(const struct logical_volume *lv,
+				uint64_t *transaction_id);
 int lv_thin_device_id(const struct logical_volume *lv, uint32_t *device_id);
-int lv_thin_status(const struct logical_volume *lv, int flush,
-		   struct lv_status_thin **status);
-int lv_thin_pool_status(const struct logical_volume *lv, int flush,
-			struct lv_status_thin_pool **status);
 int lv_vdo_pool_status(const struct logical_volume *lv, int flush,
 		       struct lv_status_vdo **status);
 int lv_vdo_pool_percent(const struct logical_volume *lv, dm_percent_t *percent);
@@ -260,7 +260,6 @@ void fs_unlock(void);

 #define TARGET_NAME_CACHE "cache"
 #define TARGET_NAME_WRITECACHE "writecache"
-#define TARGET_NAME_INTEGRITY "integrity"
 #define TARGET_NAME_ERROR "error"
 #define TARGET_NAME_ERROR_OLD "erro"	/* Truncated in older kernels */
 #define TARGET_NAME_LINEAR "linear"
@@ -278,7 +277,6 @@ void fs_unlock(void);
 #define MODULE_NAME_CLUSTERED_MIRROR "clog"
 #define MODULE_NAME_CACHE TARGET_NAME_CACHE
 #define MODULE_NAME_WRITECACHE TARGET_NAME_WRITECACHE
-#define MODULE_NAME_INTEGRITY TARGET_NAME_INTEGRITY
 #define MODULE_NAME_ERROR TARGET_NAME_ERROR
 #define MODULE_NAME_LOG_CLUSTERED "log-clustered"
 #define MODULE_NAME_LOG_USERSPACE "log-userspace"
--- a/lib/activate/dev_manager.c
+++ b/lib/activate/dev_manager.c
@@ -33,7 +33,6 @@
 #define MAX_TARGET_PARAMSIZE 50000
 #define LVM_UDEV_NOSCAN_FLAG DM_SUBSYSTEM_UDEV_FLAG0
 #define CRYPT_TEMP	"CRYPT-TEMP"
-#define CRYPT_SUBDEV	"CRYPT-SUBDEV"
 #define STRATIS		"stratis-"

 typedef enum {
@@ -46,7 +45,7 @@ typedef enum {
 } action_t;

 /* This list must match lib/misc/lvm-string.c:build_dm_uuid(). */
-const char *uuid_suffix_list[] = { "pool", "cdata", "cmeta", "cvol", "tdata", "tmeta", "vdata", "vpool", "imeta", NULL};
+const char *uuid_suffix_list[] = { "pool", "cdata", "cmeta", "tdata", "tmeta", "vdata", "vpool", NULL};

 struct dlid_list {
 	struct dm_list list;
@@ -85,11 +84,6 @@ int read_only_lv(const struct logical_volume *lv, const struct lv_activate_opts
 	if (lv_is_raid_image(lv) || lv_is_raid_metadata(lv))
 		return 0; /* Keep RAID SubLvs writable */

-	if (!layer) {
-		if (lv_is_thin_pool(lv) || lv_is_vdo_pool(lv))
-			return 1;
-	}
-
 	return (laopts->read_only || !(lv->status & LVM_WRITE));
 }

@@ -222,10 +216,6 @@ static int _get_segment_status_from_target_params(const char *target_name,
 		if (!dm_get_status_writecache(seg_status->mem, params, &(seg_status->writecache)))
 			return_0;
 		seg_status->type = SEG_STATUS_WRITECACHE;
-	} else if (segtype_is_integrity(segtype)) {
-		if (!dm_get_status_integrity(seg_status->mem, params, &(seg_status->integrity)))
-			return_0;
-		seg_status->type = SEG_STATUS_INTEGRITY;
 	} else
 		/*
 		 * TODO: Add support for other segment types too!
@@ -252,7 +242,6 @@ static uint32_t _seg_len(const struct lv_segment *seg)
 static int _info_run(const char *dlid, struct dm_info *dminfo,
 		     uint32_t *read_ahead,
 		     struct lv_seg_status *seg_status,
-		     const char *name_check,
 		     int with_open_count, int with_read_ahead,
 		     uint32_t major, uint32_t minor)
 {
@@ -263,7 +252,6 @@ static int _info_run(const char *dlid, struct dm_info *dminfo,
 	void *target = NULL;
 	uint64_t target_start, target_length, start, length;
 	char *target_name, *target_params;
-	const char *devname;

 	if (seg_status) {
 		dmtask = DM_DEVICE_STATUS;
@@ -277,12 +265,7 @@ static int _info_run(const char *dlid, struct dm_info *dminfo,
 				    with_open_count, with_flush, 0)))
 		return_0;

-	if (name_check && dminfo->exists &&
-	    (devname = dm_task_get_name(dmt)) &&
-	    (strcmp(name_check, devname) != 0))
-		dminfo->exists = 0;	/* mismatching name -> device does not exist */
-
-	if (with_read_ahead && read_ahead && dminfo->exists) {
+	if (with_read_ahead && dminfo->exists) {
 		if (!dm_task_get_read_ahead(dmt, read_ahead))
 			goto_out;
 	} else if (read_ahead)
@@ -303,9 +286,6 @@ static int _info_run(const char *dlid, struct dm_info *dminfo,
 		if (lv_is_vdo_pool(seg_status->seg->lv))
 			length = get_vdo_pool_virtual_size(seg_status->seg);

-		if (lv_is_integrity(seg_status->seg->lv))
-			length = seg_status->seg->integrity_data_sectors;
-
 		do {
 			target = dm_get_next_target(dmt, target, &target_start,
 						    &target_length, &target_name, &target_params);
@@ -678,7 +658,6 @@ int device_is_usable(struct device *dev, struct dev_usable_check_params check)

 	if (check.check_reserved && uuid &&
 	    (!strncmp(uuid, CRYPT_TEMP, sizeof(CRYPT_TEMP) - 1) ||
-	     !strncmp(uuid, CRYPT_SUBDEV, sizeof(CRYPT_SUBDEV) - 1) ||
 	     !strncmp(uuid, STRATIS, sizeof(STRATIS) - 1))) {
 		/* Skip private crypto devices */
 		log_debug_activation("%s: Reserved uuid %s on %s device %s not usable.",
@@ -805,19 +784,18 @@ static int _original_uuid_format_check_required(struct cmd_context *cmd)

 static int _info(struct cmd_context *cmd,
 		 const char *name, const char *dlid,
-		 int with_open_count, int with_read_ahead, int with_name_check,
+		 int with_open_count, int with_read_ahead,
 		 struct dm_info *dminfo, uint32_t *read_ahead,
 		 struct lv_seg_status *seg_status)
 {
 	char old_style_dlid[sizeof(UUID_PREFIX) + 2 * ID_LEN];
 	const char *suffix, *suffix_position;
-	const char *name_check = (with_name_check) ? name : NULL;
 	unsigned i = 0;

 	log_debug_activation("Getting device info for %s [%s].", name, dlid);

 	/* Check for dlid */
-	if (!_info_run(dlid, dminfo, read_ahead, seg_status, name_check,
+	if (!_info_run(dlid, dminfo, read_ahead, seg_status,
 		       with_open_count, with_read_ahead, 0, 0))
 		return_0;

@@ -833,8 +811,7 @@ static int _info(struct cmd_context *cmd,
 			(void) strncpy(old_style_dlid, dlid, sizeof(old_style_dlid));
 			old_style_dlid[sizeof(old_style_dlid) - 1] = '\0';
 			if (!_info_run(old_style_dlid, dminfo, read_ahead, seg_status,
-				       name_check, with_open_count, with_read_ahead,
-				       0, 0))
+				       with_open_count, with_read_ahead, 0, 0))
 				return_0;
 			if (dminfo->exists)
 				return 1;
@@ -847,12 +824,97 @@ static int _info(struct cmd_context *cmd,

 	/* Check for dlid before UUID_PREFIX was added */
 	if (!_info_run(dlid + sizeof(UUID_PREFIX) - 1, dminfo, read_ahead, seg_status,
-		       name_check, with_open_count, with_read_ahead, 0, 0))
+		       with_open_count, with_read_ahead, 0, 0))
 		return_0;

 	return 1;
 }

+/* FIXME: could we just use dev_manager_info instead of this? */
+
+int get_cache_vol_meta_data(struct cmd_context *cmd,
+				    struct logical_volume *lv,
+				    struct logical_volume *pool_lv,
+				    struct dm_info *info_meta, struct dm_info *info_data)
+{
+	struct lv_segment *lvseg = first_seg(lv);
+	union lvid lvid_meta;
+	union lvid lvid_data;
+	char *name_meta;
+	char *name_data;
+	char *dlid_meta;
+	char *dlid_data;
+
+	memset(&lvid_meta, 0, sizeof(lvid_meta));
+	memset(&lvid_data, 0, sizeof(lvid_meta));
+	memcpy(&lvid_meta.id[0], &lv->vg->id, sizeof(struct id));
+	memcpy(&lvid_meta.id[1], &lvseg->metadata_id, sizeof(struct id));
+	memcpy(&lvid_data.id[0], &lv->vg->id, sizeof(struct id));
+	memcpy(&lvid_data.id[1], &lvseg->data_id, sizeof(struct id));
+
+	if (!(dlid_meta = dm_build_dm_uuid(cmd->mem, UUID_PREFIX, (const char *)&lvid_meta.s, NULL)))
+		return_0;
+	if (!(dlid_data = dm_build_dm_uuid(cmd->mem, UUID_PREFIX, (const char *)&lvid_data.s, NULL)))
+		return_0;
+	if (!(name_meta = dm_build_dm_name(cmd->mem, lv->vg->name, pool_lv->name, "_cmeta")))
+		return_0;
+	if (!(name_data = dm_build_dm_name(cmd->mem, lv->vg->name, pool_lv->name, "_cdata")))
+		return_0;
+
+	if (!_info(cmd, name_meta, dlid_meta, 1, 0, info_meta, NULL, NULL))
+		return_0;
+
+	if (!_info(cmd, name_data, dlid_data, 1, 0, info_data, NULL, NULL))
+		return_0;
+
+	return 1;
+}
+
+/*
+ * FIXME: isn't there a simpler, more direct way to just remove these two dm
+ * devs?
+ */
+
+int remove_cache_vol_meta_data(struct cmd_context *cmd,
+				       struct dm_info *info_meta, struct dm_info *info_data)
+{
+	struct dm_tree *dtree;
+	struct dm_tree_node *root;
+	struct dm_tree_node *child;
+	const char *uuid;
+	void *handle = NULL;
+
+	if (!(dtree = dm_tree_create()))
+		goto_out;
+
+	if (!dm_tree_add_dev(dtree, info_meta->major, info_meta->minor))
+		goto_out;
+
+	if (!dm_tree_add_dev(dtree, info_data->major, info_data->minor))
+		goto_out;
+
+	if (!(root = dm_tree_find_node(dtree, 0, 0)))
+		goto_out;
+
+	while ((child = dm_tree_next_child(&handle, root, 0))) {
+		if (!(uuid = dm_tree_node_get_uuid(child))) {
+			stack;
+			continue;
+		}
+
+		if (!dm_tree_deactivate_children(root, uuid, strlen(uuid))) {
+			stack;
+			continue;
+		}
+	}
+
+	dm_tree_free(dtree);
+	return 1;
+ out:
+	dm_tree_free(dtree);
+	return 0;
+}
+
 int dev_manager_remove_dm_major_minor(uint32_t major, uint32_t minor)
 {
 	struct dm_task *dmt;
@@ -877,7 +939,7 @@ out:

 static int _info_by_dev(uint32_t major, uint32_t minor, struct dm_info *info)
 {
-	return _info_run(NULL, info, NULL, NULL, NULL, 0, 0, major, minor);
+	return _info_run(NULL, info, NULL, 0, 0, 0, major, minor);
 }

 int dev_manager_check_prefix_dm_major_minor(uint32_t major, uint32_t minor, const char *prefix)
@@ -899,7 +961,7 @@ int dev_manager_check_prefix_dm_major_minor(uint32_t major, uint32_t minor, cons

 int dev_manager_info(struct cmd_context *cmd,
 		     const struct logical_volume *lv, const char *layer,
-		     int with_open_count, int with_read_ahead, int with_name_check,
+		     int with_open_count, int with_read_ahead,
 		     struct dm_info *dminfo, uint32_t *read_ahead,
 		     struct lv_seg_status *seg_status)
 {
@@ -912,8 +974,7 @@ int dev_manager_info(struct cmd_context *cmd,
 	if (!(dlid = build_dm_uuid(cmd->mem, lv, layer)))
 		goto_out;

-	if (!(r = _info(cmd, name, dlid,
-			with_open_count, with_read_ahead, with_name_check,
+	if (!(r = _info(cmd, name, dlid, with_open_count, with_read_ahead,
 			dminfo, read_ahead, seg_status)))
 		stack;
 out:
@@ -1564,6 +1625,9 @@ int dev_manager_cache_status(struct dev_manager *dm,
 	if (!(dlid = build_dm_uuid(dm->mem, lv, lv_layer(lv))))
 		return_0;

+	if (!(*status = dm_pool_zalloc(dm->mem, sizeof(struct lv_status_cache))))
+		return_0;
+
 	if (!(dmt = _setup_task_run(DM_DEVICE_STATUS, &info, NULL, dlid, 0, 0, 0, 0, 0, 0)))
 		return_0;

@@ -1586,11 +1650,8 @@ int dev_manager_cache_status(struct dev_manager *dm,
 	if (!dm_get_status_cache(dm->mem, params, &c))
 		goto_out;

-	if (!(*status = dm_pool_zalloc(dm->mem, sizeof(struct lv_status_cache))))
-		goto_out;
-
-	(*status)->mem = dm->mem; /* User has to destroy this mem pool later */
 	(*status)->cache = c;
+	(*status)->mem = dm->mem; /* User has to destroy this mem pool later */
 	if (c->fail || c->error) {
 		(*status)->data_usage =
 			(*status)->metadata_usage =
@@ -1612,10 +1673,10 @@ out:
 }

 int dev_manager_thin_pool_status(struct dev_manager *dm,
-				 const struct logical_volume *lv, int flush,
-				 struct lv_status_thin_pool **status)
+				 const struct logical_volume *lv,
+				 struct dm_status_thin_pool **status,
+				 int flush)
 {
-	struct dm_status_thin_pool *dm_status;
 	const char *dlid;
 	struct dm_task *dmt;
 	struct dm_info info;
@@ -1636,31 +1697,11 @@ int dev_manager_thin_pool_status(struct dev_manager *dm,

 	dm_get_next_target(dmt, NULL, &start, &length, &type, &params);

-	if (!type || strcmp(type, TARGET_NAME_THIN_POOL)) {
-		log_error("Expected %s segment type but got %s instead.",
-			  TARGET_NAME_THIN_POOL, type ? type : "NULL");
-		goto out;
-	}
+	/* FIXME Check for thin and check there's exactly one target */

-	if (!dm_get_status_thin_pool(dm->mem, params, &dm_status))
+	if (!dm_get_status_thin_pool(dm->mem, params, status))
 		goto_out;

-	if (!(*status = dm_pool_zalloc(dm->mem, sizeof(struct lv_status_thin_pool))))
-		goto_out;
-
-	(*status)->mem = dm->mem;
-	(*status)->thin_pool = dm_status;
-
-	if (dm_status->fail || dm_status->error) {
-		(*status)->data_usage =
-			(*status)->metadata_usage = DM_PERCENT_INVALID;
-	} else {
-		(*status)->data_usage = dm_make_percent(dm_status->used_data_blocks,
-							dm_status->total_data_blocks);
-		(*status)->metadata_usage = dm_make_percent(dm_status->used_metadata_blocks,
-							    dm_status->total_metadata_blocks);
-	}
-
 	r = 1;
 out:
 	dm_task_destroy(dmt);
@@ -1668,73 +1709,54 @@ out:
 	return r;
 }

-int dev_manager_thin_status(struct dev_manager *dm,
-			    const struct logical_volume *lv, int flush,
-			    struct lv_status_thin **status)
+int dev_manager_thin_pool_percent(struct dev_manager *dm,
+				  const struct logical_volume *lv,
+				  int metadata, dm_percent_t *percent)
 {
-	struct dm_status_thin *dm_status;
+	char *name;
 	const char *dlid;
-	struct dm_task *dmt;
-	struct dm_info info;
-	uint64_t start, length;
-	char *type = NULL;
-	char *params = NULL;
-	uint64_t csize;
-	int r = 0;
+	const char *layer = lv_layer(lv);

-	if (!(dlid = build_dm_uuid(dm->mem, lv, lv_layer(lv))))
+	/* Build a name for the top layer */
+	if (!(name = dm_build_dm_name(dm->mem, lv->vg->name, lv->name, layer)))
 		return_0;

-	if (!(dmt = _setup_task_run(DM_DEVICE_STATUS, &info, NULL, dlid, 0, 0, 0, 0, flush, 0)))
+	if (!(dlid = build_dm_uuid(dm->mem, lv, layer)))
 		return_0;

-	if (!info.exists)
-		goto_out;
+	log_debug_activation("Getting device status percentage for %s.", name);

-	dm_get_next_target(dmt, NULL, &start, &length, &type, &params);
+	if (!(_percent(dm, name, dlid, TARGET_NAME_THIN_POOL, 0,
+		       (metadata) ? lv : NULL, percent, NULL, 1)))
+		return_0;

-	if (!type || strcmp(type, TARGET_NAME_THIN)) {
-		log_error("Expected %s segment type but got %s instead.",
-			  TARGET_NAME_THIN, type ? type : "NULL");
-		goto out;
-	}
-
-	if (!dm_get_status_thin(dm->mem, params, &dm_status))
-		goto_out;
-
-	if (!(*status = dm_pool_zalloc(dm->mem, sizeof(struct lv_status_thin))))
-		goto_out;
-
-	(*status)->mem = dm->mem;
-	(*status)->thin = dm_status;
-
-	if (dm_status->fail)
-		(*status)->usage = DM_PERCENT_INVALID;
-	else {
-		/* Pool allocates whole chunk so round-up to nearest one */
-		csize = first_seg(first_seg(lv)->pool_lv)->chunk_size;
-		csize = ((lv->size + csize - 1) / csize) * csize;
-		if (dm_status->mapped_sectors > csize) {
-			log_warn("WARNING: LV %s maps %s while the size is only %s.",
-				 display_lvname(lv),
-				 display_size(dm->cmd, dm_status->mapped_sectors),
-				 display_size(dm->cmd, csize));
-			/* Don't show nonsense numbers like i.e. 1000% full */
-			dm_status->mapped_sectors = csize;
-		}
-		(*status)->usage = dm_make_percent(dm_status->mapped_sectors, csize);
-	}
-
-	r = 1;
-out:
-	dm_task_destroy(dmt);
-
-	return r;
+	return 1;
+}
+
+int dev_manager_thin_percent(struct dev_manager *dm,
+			     const struct logical_volume *lv,
+			     int mapped, dm_percent_t *percent)
+{
+	char *name;
+	const char *dlid;
+	const char *layer = lv_layer(lv);
+
+	/* Build a name for the top layer */
+	if (!(name = dm_build_dm_name(dm->mem, lv->vg->name, lv->name, layer)))
+		return_0;
+
+	if (!(dlid = build_dm_uuid(dm->mem, lv, layer)))
+		return_0;
+
+	log_debug_activation("Getting device status percentage for %s", name);
+
+	if (!(_percent(dm, name, dlid, TARGET_NAME_THIN, 0,
+		       (mapped) ? NULL : lv, percent, NULL, 1)))
+		return_0;
+
+	return 1;
 }

-/*
- * Explore state of running DM table to obtain currently used deviceId
- */
 int dev_manager_thin_device_id(struct dev_manager *dm,
 			       const struct logical_volume *lv,
 			       uint32_t *device_id)
@@ -1744,16 +1766,10 @@ int dev_manager_thin_device_id(struct dev_manager *dm,
 	struct dm_info info;
 	uint64_t start, length;
 	char *params, *target_type = NULL;
-	const char *layer = lv_layer(lv);
 	int r = 0;

-	if (lv_is_merging_origin(lv) && !lv_info(lv->vg->cmd, lv, 1, NULL, 0, 0))
-		/* If the merge has already happened, that table
-		 * can already be using correct LV without -real layer */
-		layer = NULL;
-
 	/* Build dlid for the thin layer */
-	if (!(dlid = build_dm_uuid(dm->mem, lv, layer)))
+	if (!(dlid = build_dm_uuid(dm->mem, lv, lv_layer(lv))))
 		return_0;

 	if (!(dmt = _setup_task_run(DM_DEVICE_TABLE, &info, NULL, dlid, 0, 0, 0, 0, 1, 0)))
@@ -1968,7 +1984,7 @@ static uint16_t _get_udev_flags(struct dev_manager *dm, const struct logical_vol
 		/* New thin-pool is regular LV with -tpool UUID suffix. */
 		udev_flags |= DM_UDEV_DISABLE_DISK_RULES_FLAG |
 		              DM_UDEV_DISABLE_OTHER_RULES_FLAG;
-	else if (layer || !lv_is_visible(lv) || lv_is_thin_pool(lv) || lv_is_vdo_pool(lv))
+	else if (layer || !lv_is_visible(lv) || lv_is_thin_pool(lv))
 		udev_flags |= DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG |
 			      DM_UDEV_DISABLE_DISK_RULES_FLAG |
 			      DM_UDEV_DISABLE_OTHER_RULES_FLAG;
@@ -2149,7 +2165,7 @@ static int _add_dev_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 	if (!(dlid = build_dm_uuid(dm->track_pending_delete ? dm->cmd->pending_delete_mem : dm->mem, lv, layer)))
 		return_0;

-	if (!_info(dm->cmd, name, dlid, 1, 0, 0, &info, NULL, NULL))
+	if (!_info(dm->cmd, name, dlid, 1, 0, &info, NULL, NULL))
 		return_0;

 	/*
@@ -2424,51 +2440,6 @@ static int _pool_register_callback(struct dev_manager *dm,
 	return 1;
 }

-/* Add special devices _cmeta & _cdata on top of CacheVol to dm tree */
-static int _add_cvol_subdev_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
-				     const struct logical_volume *lv, int meta_or_data)
-{
-	const char *layer = meta_or_data ? "cmeta" : "cdata";
-	struct dm_pool *mem = dm->track_pending_delete ? dm->cmd->pending_delete_mem : dm->mem;
-	const struct logical_volume *pool_lv = first_seg(lv)->pool_lv;
-	struct lv_segment *lvseg = first_seg(lv);
-	struct dm_info info;
-	char *name ,*dlid;
-	union lvid lvid = { { { "" } } };
-
-	memcpy(&lvid.id[0], &lv->vg->id, sizeof(struct id));
-	/* When ID is provided in form of metadata_id or data_id, otherwise use CVOL ID */
-	memcpy(&lvid.id[1],
-	       (meta_or_data && lvseg->metadata_id) ? lvseg->metadata_id :
-	       (lvseg->data_id) ? lvseg->data_id : &pool_lv->lvid.id[1], sizeof(struct id));
-
-	if (!(dlid = dm_build_dm_uuid(mem, UUID_PREFIX, (const char *)&lvid.s, layer)))
-		return_0;
-
-	/* Name is actually not really needed here, but aids debugging... */
-	if (!(name = dm_build_dm_name(dm->mem, lv->vg->name, pool_lv->name, layer)))
-		return_0;
-
-	if (!_info(dm->cmd, name, dlid, 1, 0, 0, &info, NULL, NULL))
-		return_0;
-
-	if (info.exists) {
-		if (!dm_tree_add_dev_with_udev_flags(dtree, info.major, info.minor,
-						     _get_udev_flags(dm, lv, layer, 0, 0, 0))) {
-			log_error("Failed to add device (%" PRIu32 ":%" PRIu32") to dtree.", info.major, info.minor);
-			return 0;
-		}
-		if (dm->track_pending_delete) {
-			log_debug_activation("Tracking pending delete for %s %s (%s).",
-					     layer, display_lvname(lv), dlid);
-			if (!str_list_add(mem, &dm->cmd->pending_delete, dlid))
-				return_0;
-		}
-	}
-
-	return 1;
-}
-
 /* Declaration to resolve suspend tree and message passing for thin-pool */
 static int _add_target_to_dtree(struct dev_manager *dm,
 				struct dm_tree_node *dnode,
@@ -2503,11 +2474,51 @@ static int _add_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 		/* Unused cache pool is activated as metadata */
 	}

-	if (lv_is_cache(lv) && (plv = (first_seg(lv)->pool_lv)) && lv_is_cache_vol(plv)) {
-		if (!_add_cvol_subdev_to_dtree(dm, dtree, lv, 0) ||
-		    !_add_cvol_subdev_to_dtree(dm, dtree, lv, 1) ||
-		    !_add_dev_to_dtree(dm, dtree, plv, lv_layer(plv)))
+	if (lv_is_cache(lv) && lv_is_cache_vol(first_seg(lv)->pool_lv) && dm->activation) {
+		struct logical_volume *pool_lv = first_seg(lv)->pool_lv;
+		struct lv_segment *lvseg = first_seg(lv);
+		struct dm_info info_meta;
+		struct dm_info info_data;
+		union lvid lvid_meta;
+		union lvid lvid_data;
+		char *name_meta;
+		char *name_data;
+		char *dlid_meta;
+		char *dlid_data;
+
+		memset(&lvid_meta, 0, sizeof(lvid_meta));
+		memset(&lvid_data, 0, sizeof(lvid_meta));
+		memcpy(&lvid_meta.id[0], &lv->vg->id, sizeof(struct id));
+		memcpy(&lvid_meta.id[1], &lvseg->metadata_id, sizeof(struct id));
+		memcpy(&lvid_data.id[0], &lv->vg->id, sizeof(struct id));
+		memcpy(&lvid_data.id[1], &lvseg->data_id, sizeof(struct id));
+
+		if (!(dlid_meta = dm_build_dm_uuid(dm->mem, UUID_PREFIX, (const char *)&lvid_meta.s, NULL)))
 			return_0;
+		if (!(dlid_data = dm_build_dm_uuid(dm->mem, UUID_PREFIX, (const char *)&lvid_data.s, NULL)))
+			return_0;
+		if (!(name_meta = dm_build_dm_name(dm->mem, lv->vg->name, pool_lv->name, "_cmeta")))
+			return_0;
+		if (!(name_data = dm_build_dm_name(dm->mem, lv->vg->name, pool_lv->name, "_cdata")))
+			return_0;
+
+		if (!_info(dm->cmd, name_meta, dlid_meta, 1, 0, &info_meta, NULL, NULL))
+			return_0;
+
+		if (!_info(dm->cmd, name_data, dlid_data, 1, 0, &info_data, NULL, NULL))
+			return_0;
+
+		if (info_meta.exists &&
+		    !dm_tree_add_dev_with_udev_flags(dtree, info_meta.major, info_meta.minor,
+						     _get_udev_flags(dm, lv, NULL, 0, 0, 0))) {
+			log_error("Failed to add device (%" PRIu32 ":%" PRIu32") to dtree.", info_meta.major, info_meta.minor);
+		}
+
+		if (info_data.exists &&
+		    !dm_tree_add_dev_with_udev_flags(dtree, info_data.major, info_data.minor,
+						     _get_udev_flags(dm, lv, NULL, 0, 0, 0))) {
+			log_error("Failed to add device (%" PRIu32 ":%" PRIu32") to dtree.", info_data.major, info_data.minor);
+		}
 	}

 	if (!origin_only && !_add_dev_to_dtree(dm, dtree, lv, NULL))
@@ -2593,15 +2604,6 @@ static int _add_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 		}
 	}

-	if (lv_is_vdo_pool(lv)) {
-		/*
-		 * For both origin_only and !origin_only
-		 * skips test for -vpool-real and vpool-cow
-		 */
-		if (!_add_dev_to_dtree(dm, dtree, lv, lv_layer(lv)))
-			return_0;
-	}
-
 	if (lv_is_cache(lv)) {
 		if (!origin_only && !dm->activation && !dm->track_pending_delete) {
 			/* Setup callback for non-activation partial tree */
@@ -2663,10 +2665,6 @@ static int _add_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 			if (!_add_lv_to_dtree(dm, dtree, seg->writecache, dm->activation ? origin_only : 1))
 				return_0;
 		}
-		if (seg->integrity_meta_dev && seg_is_integrity(seg)) {
-			if (!_add_lv_to_dtree(dm, dtree, seg->integrity_meta_dev, dm->activation ? origin_only : 1))
-				return_0;
-		}
 		if (seg->pool_lv &&
 		    (lv_is_cache_pool(seg->pool_lv) || lv_is_cache_vol(seg->pool_lv) || dm->track_external_lv_deps) &&
 		    /* When activating and not origin_only detect linear 'overlay' over pool */
@@ -2677,8 +2675,7 @@ static int _add_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 			if (seg_type(seg, s) == AREA_LV && seg_lv(seg, s) &&
 			    /* origin only for cache without pending delete */
 			    (!dm->track_pending_delete || !lv_is_cache(lv)) &&
-			    !_add_lv_to_dtree(dm, dtree, seg_lv(seg, s),
-					      lv_is_vdo_pool(seg_lv(seg, s)) ? 1 : 0))
+			    !_add_lv_to_dtree(dm, dtree, seg_lv(seg, s), 0))
 				return_0;
 			if (seg_is_raid_with_meta(seg) && seg->meta_areas && seg_metalv(seg, s) &&
 			    !_add_lv_to_dtree(dm, dtree, seg_metalv(seg, s), 0))
@@ -2749,7 +2746,7 @@ static char *_add_error_or_zero_device(struct dev_manager *dm, struct dm_tree *d
 				      seg->lv->name, errid)))
 		return_NULL;

-	if (!_info(dm->cmd, name, dlid, 1, 0, 0, &info, NULL, NULL))
+	if (!_info(dm->cmd, name, dlid, 1, 0, &info, NULL, NULL))
 		return_NULL;

 	if (!info.exists) {
@@ -2904,11 +2901,8 @@ static int _add_layer_target_to_dtree(struct dev_manager *dm,
 	if (!(layer_dlid = build_dm_uuid(dm->mem, lv, lv_layer(lv))))
 		return_0;

-
 	/* Add linear mapping over layered LV */
-	/* From VDO layer expose ONLY vdo pool header, we would need to use virtual size otherwise */
-	if (!add_linear_area_to_dtree(dnode, lv_is_vdo_pool(lv) ? first_seg(lv)->vdo_pool_header_size : lv->size,
-				      lv->vg->extent_size,
+	if (!add_linear_area_to_dtree(dnode, lv->size, lv->vg->extent_size,
 				      lv->vg->cmd->use_linear_target,
 				      lv->vg->name, lv->name) ||
 	    !dm_tree_node_add_target_area(dnode, NULL, layer_dlid, 0))
@@ -3123,11 +3117,6 @@ static int _add_segment_to_dtree(struct dev_manager *dm,
 				  lv_layer(seg->writecache)))
 		return_0;

-	if (seg->integrity_meta_dev && !laopts->origin_only &&
-	    !_add_new_lv_to_dtree(dm, dtree, seg->integrity_meta_dev, laopts,
-				  lv_layer(seg->integrity_meta_dev)))
-		return_0;
-
 	/* Add any LVs used by this segment */
 	for (s = 0; s < seg->area_count; ++s) {
 		if ((seg_type(seg, s) == AREA_LV) &&
@@ -3136,9 +3125,7 @@ static int _add_segment_to_dtree(struct dev_manager *dm,
 		    /* origin only for cache without pending delete */
 		    (!dm->track_pending_delete || !seg_is_cache(seg)) &&
 		    !_add_new_lv_to_dtree(dm, dtree, seg_lv(seg, s),
-					  laopts,
-					  lv_is_vdo_pool(seg_lv(seg, s)) ?
-					  lv_layer(seg_lv(seg, s)) : NULL))
+					  laopts, NULL))
 			return_0;
 		if (seg_is_raid_with_meta(seg) && seg->meta_areas && seg_metalv(seg, s) &&
 		    !lv_is_raid_image_with_tracking(seg_lv(seg, s)) &&
@@ -3213,37 +3200,34 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 		char *dlid_meta;
 		char *dlid_data;
 		char *dlid_pool;
-		uint64_t meta_size = first_seg(lv)->metadata_len;
-		uint64_t data_size = first_seg(lv)->data_len;
+		uint64_t meta_len = first_seg(lv)->metadata_len;
+		uint64_t data_len = first_seg(lv)->data_len;
 		uint16_t udev_flags = _get_udev_flags(dm, lv, layer,
 					     laopts->noscan, laopts->temporary,
 					     0);

-		if (lv_is_pending_delete(lvseg->lv))
-			dm->track_pending_delete = 1;
+		log_debug("Add cache pool %s to dtree before cache %s", pool_lv->name, lv->name);

-		log_debug("Add cachevol %s to dtree before cache %s.", pool_lv->name, lv->name);
-
-		if (!_add_new_lv_to_dtree(dm, dtree, pool_lv, laopts, lv_layer(pool_lv))) {
-			log_error("Failed to add cachevol to dtree before cache.");
-			return 0;
+		if (!_add_new_lv_to_dtree(dm, dtree, pool_lv, laopts, NULL)) {
+			log_error("Failed to add cachepool to dtree before cache");
+			return_0;
 		}

 		memset(&lvid_meta, 0, sizeof(lvid_meta));
 		memset(&lvid_data, 0, sizeof(lvid_meta));
 		memcpy(&lvid_meta.id[0], &vg->id, sizeof(struct id));
-		memcpy(&lvid_meta.id[1], lvseg->metadata_id ? : &pool_lv->lvid.id[1], sizeof(struct id));
+		memcpy(&lvid_meta.id[1], &lvseg->metadata_id, sizeof(struct id));
 		memcpy(&lvid_data.id[0], &vg->id, sizeof(struct id));
-		memcpy(&lvid_data.id[1], lvseg->data_id ? : &pool_lv->lvid.id[1], sizeof(struct id));
+		memcpy(&lvid_data.id[1], &lvseg->data_id, sizeof(struct id));

-		if (!(dlid_meta = dm_build_dm_uuid(dm->mem, UUID_PREFIX, (const char *)&lvid_meta.s, "cmeta")))
+		if (!(dlid_meta = dm_build_dm_uuid(dm->mem, UUID_PREFIX, (const char *)&lvid_meta.s, NULL)))
 			return_0;
-		if (!(dlid_data = dm_build_dm_uuid(dm->mem, UUID_PREFIX, (const char *)&lvid_data.s, "cdata")))
+		if (!(dlid_data = dm_build_dm_uuid(dm->mem, UUID_PREFIX, (const char *)&lvid_data.s, NULL)))
 			return_0;

-		if (!(name_meta = dm_build_dm_name(dm->mem, vg->name, pool_lv->name, "cmeta")))
+		if (!(name_meta = dm_build_dm_name(dm->mem, vg->name, pool_lv->name, "_cmeta")))
 			return_0;
-		if (!(name_data = dm_build_dm_name(dm->mem, vg->name, pool_lv->name, "cdata")))
+		if (!(name_data = dm_build_dm_name(dm->mem, vg->name, pool_lv->name, "_cdata")))
 			return_0;

 		if (!(dlid_pool = build_dm_uuid(dm->mem, pool_lv, NULL)))
@@ -3260,23 +3244,17 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 								  udev_flags)))
 			return_0;

-		if (dm->track_pending_delete) {
-			log_debug_activation("Using error for pending meta delete %s.", display_lvname(lv));
-			if (!dm_tree_node_add_error_target(dnode_meta, meta_size))
-				return_0;
-		} else {
-			/* add load_segment to meta dnode: linear, size of meta area */
-			if (!add_linear_area_to_dtree(dnode_meta,
-						      meta_size,
-						      lv->vg->extent_size,
-						      lv->vg->cmd->use_linear_target,
-						      lv->vg->name, lv->name))
-				return_0;
+		/* add load_segment to meta dnode: linear, size of meta area */
+		if (!add_linear_area_to_dtree(dnode_meta,
+					      meta_len,
+					      lv->vg->extent_size,
+					      lv->vg->cmd->use_linear_target,
+					      lv->vg->name, lv->name))
+			return_0;

-			/* add seg_area to prev load_seg: offset 0 maps to cachepool lv offset 0 */
-			if (!dm_tree_node_add_target_area(dnode_meta, NULL, dlid_pool, 0))
-				return_0;
-		}
+		/* add seg_area to prev load_seg: offset 0 maps to cachepool lv offset 0 */
+		if (!dm_tree_node_add_target_area(dnode_meta, NULL, dlid_pool, 0))
+			return_0;

 		/* add data dnode */
 		if (!(dnode_data = dm_tree_add_new_dev_with_udev_flags(dtree,
@@ -3289,23 +3267,17 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 								  udev_flags)))
 			return_0;

-		if (dm->track_pending_delete) {
-			log_debug_activation("Using error for pending data delete %s.", display_lvname(lv));
-			if (!dm_tree_node_add_error_target(dnode_data, data_size))
-				return_0;
-		} else {
-			/* add load_segment to data dnode: linear, size of data area */
-			if (!add_linear_area_to_dtree(dnode_data,
-						      data_size,
-						      lv->vg->extent_size,
-						      lv->vg->cmd->use_linear_target,
-						      lv->vg->name, lv->name))
-				return_0;
+		/* add load_segment to data dnode: linear, size of data area */
+		if (!add_linear_area_to_dtree(dnode_data,
+					      data_len,
+					      lv->vg->extent_size,
+					      lv->vg->cmd->use_linear_target,
+					      lv->vg->name, lv->name))
+			return_0;

-			/* add seg_area to prev load_seg: offset 0 maps to cachepool lv after meta */
-			if (!dm_tree_node_add_target_area(dnode_data, NULL, dlid_pool, meta_size))
-				return_0;
-		}
+		/* add seg_area to prev load_seg: offset 0 maps to cachepool lv after meta */
+		if (!dm_tree_node_add_target_area(dnode_data, NULL, dlid_pool, meta_len))
+			return_0;
 	}

 	/* FIXME Seek a simpler way to lay out the snapshot-merge tree. */
@@ -3368,10 +3340,6 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 	if (!layer && lv_is_new_thin_pool(lv))
 		layer = lv_layer(lv);

-	/* Adds -real to the dm uuid of wcorig LV. */
-	if (!layer && lv_is_writecache_origin(lv))
-		layer = lv_layer(lv); /* "real" */
-
 	if (!(dlid = build_dm_uuid(dm->mem, lv, layer)))
 		return_0;

@@ -3449,9 +3417,8 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 		if (!_add_snapshot_target_to_dtree(dm, dnode, lv, laopts))
 			return_0;
 	} else if (!layer && ((lv_is_thin_pool(lv) && !lv_is_new_thin_pool(lv)) ||
-                              lv_is_vdo_pool(lv) ||
 			      lv_is_external_origin(lv))) {
-		/* External origin or 'used' Thin pool or VDO pool is using layer */
+		/* External origin or 'used' Thin pool is using layer */
 		if (!_add_new_lv_to_dtree(dm, dtree, lv, laopts, lv_layer(lv)))
 			return_0;
 		if (!_add_layer_target_to_dtree(dm, dnode, lv))
@@ -3464,10 +3431,6 @@ static int _add_new_lv_to_dtree(struct dev_manager *dm, struct dm_tree *dtree,
 			if (max_stripe_size < seg->stripe_size * seg->area_count)
 				max_stripe_size = seg->stripe_size * seg->area_count;
 		}
-
-		if (!layer && lv_is_vdo_pool(lv) &&
-		    !_add_layer_target_to_dtree(dm, dnode, lv))
-			return_0;
 	}

 	/* Setup thin pool callback */
@@ -3735,10 +3698,7 @@ static int _tree_action(struct dev_manager *dm, const struct logical_volume *lv,
 		/* Add all required new devices to tree */
 		if (!_add_new_lv_to_dtree(dm, dtree, lv, laopts,
 					  (lv_is_origin(lv) && laopts->origin_only) ? "real" :
-					  (laopts->origin_only &&
-					   (lv_is_thin_pool(lv) ||
-					    lv_is_vdo_pool(lv))) ?
-					  lv_layer(lv) : NULL))
+					  (lv_is_thin_pool(lv) && laopts->origin_only) ? "tpool" : NULL))
 			goto_out;

 		/* Preload any devices required before any suspensions */
--- a/lib/activate/dev_manager.h
+++ b/lib/activate/dev_manager.h
@@ -47,7 +47,7 @@ void dev_manager_exit(void);
 */
 int dev_manager_info(struct cmd_context *cmd, const struct logical_volume *lv,
 		     const char *layer,
-		     int with_open_count, int with_read_ahead, int with_name_check,
+		     int with_open_count, int with_read_ahead,
 		     struct dm_info *dminfo, uint32_t *read_ahead,
 		     struct lv_seg_status *seg_status);

@@ -69,15 +69,19 @@ int dev_manager_writecache_message(struct dev_manager *dm,
 int dev_manager_cache_status(struct dev_manager *dm,
 			     const struct logical_volume *lv,
 			     struct lv_status_cache **status);
-int dev_manager_thin_status(struct dev_manager *dm,
-			    const struct logical_volume *lv, int flush,
-			    struct lv_status_thin **status);
+int dev_manager_thin_pool_status(struct dev_manager *dm,
+				 const struct logical_volume *lv,
+				 struct dm_status_thin_pool **status,
+				 int flush);
+int dev_manager_thin_pool_percent(struct dev_manager *dm,
+				  const struct logical_volume *lv,
+				  int metadata, dm_percent_t *percent);
+int dev_manager_thin_percent(struct dev_manager *dm,
+			     const struct logical_volume *lv,
+			     int mapped, dm_percent_t *percent);
 int dev_manager_thin_device_id(struct dev_manager *dm,
 			       const struct logical_volume *lv,
 			       uint32_t *device_id);
-int dev_manager_thin_pool_status(struct dev_manager *dm,
-				 const struct logical_volume *lv, int flush,
-				 struct lv_status_thin_pool **status);
 int dev_manager_vdo_pool_status(struct dev_manager *dm,
 				const struct logical_volume *lv,
 				struct lv_status_vdo **vdo_status,
@@ -105,4 +109,12 @@ int dev_manager_remove_dm_major_minor(uint32_t major, uint32_t minor);

 int dev_manager_check_prefix_dm_major_minor(uint32_t major, uint32_t minor, const char *prefix);

+int get_cache_vol_meta_data(struct cmd_context *cmd,
+                                    struct logical_volume *lv,
+                                    struct logical_volume *pool_lv,
+                                    struct dm_info *info_meta, struct dm_info *info_data);
+
+int remove_cache_vol_meta_data(struct cmd_context *cmd,
+                                       struct dm_info *info_meta, struct dm_info *info_data);
+
 #endif
--- a/lib/activate/fs.c
+++ b/lib/activate/fs.c
@@ -313,7 +313,7 @@ struct fs_op_parms {
 	char *lv_name;
 	char *dev;
 	char *old_lv_name;
-	char names[];
+	char names[0];
 };

 static void _store_str(char **pos, char **ptr, const char *str)
--- a/lib/cache/lvmcache.c
+++ b/lib/cache/lvmcache.c
--- a/lib/cache/lvmcache.h
+++ b/lib/cache/lvmcache.h
@@ -41,9 +41,14 @@ struct lvmcache_vginfo;

 /*
 * vgsummary represents a summary of the VG that is read
- * without a lock during label scan.  It's used to populate
- * basic lvmcache vginfo/info during label scan prior to
- * vg_read().
+ * without a lock.  The info does not come through vg_read(),
+ * but through reading mdas.  It provides information about
+ * the VG that is needed to lock the VG and then read it fully
+ * with vg_read(), after which the VG summary should be checked
+ * against the full VG metadata to verify it was correct (since
+ * it was read without a lock.)
+ *
+ * Once read, vgsummary information is saved in lvmcache_vginfo.
 */
 struct lvmcache_vgsummary {
 	const char *vgname;
@@ -58,8 +63,6 @@ struct lvmcache_vgsummary {
 	int mda_num; /* 1 = summary from mda1, 2 = summary from mda2 */
 	unsigned mda_ignored:1;
 	unsigned zero_offset:1;
-	unsigned mismatch:1; /* lvmcache sets if this summary differs from previous values */
-	struct dm_list pvsummaries;
 };

 int lvmcache_init(struct cmd_context *cmd);
@@ -69,19 +72,18 @@ void lvmcache_destroy(struct cmd_context *cmd, int retain_orphans, int reset);
 int lvmcache_label_scan(struct cmd_context *cmd);
 int lvmcache_label_rescan_vg(struct cmd_context *cmd, const char *vgname, const char *vgid);
 int lvmcache_label_rescan_vg_rw(struct cmd_context *cmd, const char *vgname, const char *vgid);
-int lvmcache_label_reopen_vg_rw(struct cmd_context *cmd, const char *vgname, const char *vgid);

 /* Add/delete a device */
-struct lvmcache_info *lvmcache_add(struct cmd_context *cmd, struct labeller *labeller, const char *pvid,
+struct lvmcache_info *lvmcache_add(struct labeller *labeller, const char *pvid,
                                   struct device *dev, uint64_t label_sector,
                                   const char *vgname, const char *vgid,
                                   uint32_t vgstatus, int *is_duplicate);
-int lvmcache_add_orphan_vginfo(struct cmd_context *cmd, const char *vgname, struct format_type *fmt);
+int lvmcache_add_orphan_vginfo(const char *vgname, struct format_type *fmt);
 void lvmcache_del(struct lvmcache_info *info);
 void lvmcache_del_dev(struct device *dev);

 /* Update things */
-int lvmcache_update_vgname_and_id(struct cmd_context *cmd, struct lvmcache_info *info,
+int lvmcache_update_vgname_and_id(struct lvmcache_info *info,
 				  struct lvmcache_vgsummary *vgsummary);
 int lvmcache_update_vg_from_read(struct volume_group *vg, unsigned precommitted);
 int lvmcache_update_vg_from_write(struct volume_group *vg);
@@ -162,6 +164,11 @@ struct device *lvmcache_device(struct lvmcache_info *info);
 unsigned lvmcache_mda_count(struct lvmcache_info *info);
 uint64_t lvmcache_smallest_mda_size(struct lvmcache_info *info);

+struct metadata_area *lvmcache_get_mda(struct cmd_context *cmd,
+                                      const char *vgname,
+                                      struct device *dev,
+                                      int use_mda_num);
+
 bool lvmcache_has_duplicate_devs(void);
 void lvmcache_del_dev_from_duplicates(struct device *dev);
 bool lvmcache_dev_is_unused_duplicate(struct device *dev);
@@ -170,7 +177,6 @@ int lvmcache_get_unused_duplicates(struct cmd_context *cmd, struct dm_list *head
 int vg_has_duplicate_pvs(struct volume_group *vg);

 int lvmcache_found_duplicate_vgnames(void);
-bool lvmcache_has_duplicate_local_vgname(const char *vgid, const char *vgname);

 int lvmcache_contains_lock_type_sanlock(struct cmd_context *cmd);

@@ -213,13 +219,4 @@ void lvmcache_get_bad_mdas(struct cmd_context *cmd,
                           const char *vgname, const char *vgid,
                           struct dm_list *bad_mda_list);

-void lvmcache_get_mdas(struct cmd_context *cmd,
-                       const char *vgname, const char *vgid,
-                       struct dm_list *mda_list);
-
-const char *dev_filtered_reason(struct device *dev);
-const char *devname_error_reason(const char *devname);
-
-struct metadata_area *lvmcache_get_dev_mda(struct device *dev, int mda_num);
-
 #endif
--- a/lib/cache_segtype/cache.c
+++ b/lib/cache_segtype/cache.c
@@ -504,6 +504,9 @@ static int _cache_text_import(struct lv_segment *seg,

 	seg->lv->status |= strstr(seg->lv->name, "_corig") ? LV_PENDING_DELETE : 0;

+	if (!attach_pool_lv(seg, pool_lv, NULL, NULL, NULL))
+		return_0;
+
 	if (!_settings_text_import(seg, sn))
 		return_0;

@@ -525,26 +528,17 @@ static int _cache_text_import(struct lv_segment *seg,
 		if (!dm_config_get_uint64(sn, "data_len", &seg->data_len))
 			return SEG_LOG_ERROR("Couldn't read data_len in");

-		/* Will use CVOL ID, when metadata_id is not provided */
-		if (dm_config_has_node(sn, "metadata_id")) {
-			if (!(seg->metadata_id = dm_pool_alloc(seg->lv->vg->vgmem, sizeof(*seg->metadata_id))))
-				return SEG_LOG_ERROR("Couldn't allocate metadata_id in");
-			if (!dm_config_get_str(sn, "metadata_id", &uuid))
-				return SEG_LOG_ERROR("Couldn't read metadata_id in");
-			if (!id_read_format(seg->metadata_id, uuid))
-				return SEG_LOG_ERROR("Couldn't format metadata_id in");
-		}
+		if (!dm_config_get_str(sn, "metadata_id", &uuid))
+			return SEG_LOG_ERROR("Couldn't read metadata_id in");

-		/* Will use CVOL ID, when data_id is not provided */
-		if (dm_config_has_node(sn, "data_id")) {
-			if (!(seg->data_id = dm_pool_alloc(seg->lv->vg->vgmem, sizeof(*seg->data_id))))
-				return SEG_LOG_ERROR("Couldn't allocate data_id in");
-			if (!dm_config_get_str(sn, "data_id", &uuid))
-				return SEG_LOG_ERROR("Couldn't read data_id in");
-			if (!id_read_format(seg->data_id, uuid))
-				return SEG_LOG_ERROR("Couldn't format data_id in");
-		}
-		pool_lv->status |= LV_CACHE_VOL; /* Mark as cachevol LV */
+		if (!id_read_format(&seg->metadata_id, uuid))
+			return SEG_LOG_ERROR("Couldn't format metadata_id in");
+
+		if (!dm_config_get_str(sn, "data_id", &uuid))
+			return SEG_LOG_ERROR("Couldn't read data_id in");
+
+		if (!id_read_format(&seg->data_id, uuid))
+			return SEG_LOG_ERROR("Couldn't format data_id in");
 	} else {
 		/* Do not call this when LV is cache_vol. */
 		/* load order is unknown, could be cache origin or pool LV, so check for both */
@@ -552,9 +546,6 @@ static int _cache_text_import(struct lv_segment *seg,
 			_fix_missing_defaults(first_seg(pool_lv));
 	}

-	if (!attach_pool_lv(seg, pool_lv, NULL, NULL, NULL))
-		return_0;
-
 	return 1;
 }

@@ -590,17 +581,13 @@ static int _cache_text_export(const struct lv_segment *seg, struct formatter *f)
 		outf(f, "data_start = " FMTu64, seg->data_start);
 		outf(f, "data_len = " FMTu64, seg->data_len);

-		if (seg->metadata_id) {
-			if (!id_write_format(seg->metadata_id, buffer, sizeof(buffer)))
-				return_0;
-			outf(f, "metadata_id = \"%s\"", buffer);
-		}
+		if (!id_write_format(&seg->metadata_id, buffer, sizeof(buffer)))
+			return_0;
+		outf(f, "metadata_id = \"%s\"", buffer);

-		if (seg->data_id) {
-			if (!id_write_format(seg->data_id, buffer, sizeof(buffer)))
-				return_0;
-			outf(f, "data_id = \"%s\"", buffer);
-		}
+		if (!id_write_format(&seg->data_id, buffer, sizeof(buffer)))
+			return_0;
+		outf(f, "data_id = \"%s\"", buffer);
 	}

 	return 1;
@@ -708,13 +695,13 @@ static int _cache_add_target_line(struct dev_manager *dm,
 		memset(&metadata_lvid, 0, sizeof(metadata_lvid));
 		memset(&data_lvid, 0, sizeof(data_lvid));
 		memcpy(&metadata_lvid.id[0], &seg->lv->vg->id, sizeof(struct id));
-		memcpy(&metadata_lvid.id[1], (seg->metadata_id) ? : &seg->pool_lv->lvid.id[1], sizeof(struct id));
+		memcpy(&metadata_lvid.id[1], &seg->metadata_id, sizeof(struct id));
 		memcpy(&data_lvid.id[0], &seg->lv->vg->id, sizeof(struct id));
-		memcpy(&data_lvid.id[1], (seg->data_id) ? : &seg->pool_lv->lvid.id[1], sizeof(struct id));
+		memcpy(&data_lvid.id[1], &seg->data_id, sizeof(struct id));

-		if (!(metadata_uuid = dm_build_dm_uuid(mem, UUID_PREFIX, (const char *)&metadata_lvid.s, "cmeta")))
+		if (!(metadata_uuid = dm_build_dm_uuid(mem, UUID_PREFIX, (const char *)&metadata_lvid.s, NULL)))
 			return_0;
-		if (!(data_uuid = dm_build_dm_uuid(mem, UUID_PREFIX, (const char *)&data_lvid.s, "cdata")))
+		if (!(data_uuid = dm_build_dm_uuid(mem, UUID_PREFIX, (const char *)&data_lvid.s, NULL)))
 			return_0;
 	}

--- a/lib/commands/toolcontext.c
+++ b/lib/commands/toolcontext.c
@@ -1276,7 +1276,7 @@ int init_lvmcache_orphans(struct cmd_context *cmd)
 	struct format_type *fmt;

 	dm_list_iterate_items(fmt, &cmd->formats)
-		if (!lvmcache_add_orphan_vginfo(cmd, fmt->orphan_vg_name, fmt))
+		if (!lvmcache_add_orphan_vginfo(fmt->orphan_vg_name, fmt))
 			return_0;

 	return 1;
@@ -1362,11 +1362,6 @@ static int _init_segtypes(struct cmd_context *cmd)
 		return 0;
 #endif

-#ifdef INTEGRITY_INTERNAL
-	if (!init_integrity_segtypes(cmd, &seglib))
-		return 0;
-#endif
-
 	return 1;
 }

@@ -1598,7 +1593,6 @@ struct cmd_context *create_toolcontext(unsigned is_clvmd,
 	dm_list_init(&cmd->formats);
 	dm_list_init(&cmd->segtypes);
 	dm_list_init(&cmd->tags);
-	dm_list_init(&cmd->hints);
 	dm_list_init(&cmd->config_files);
 	label_init();

--- a/lib/commands/toolcontext.h
+++ b/lib/commands/toolcontext.h
@@ -182,7 +182,6 @@ struct cmd_context {
 	unsigned pvscan_recreate_hints:1;	/* enable special case hint handling for pvscan --cache */
 	unsigned scan_lvs:1;
 	unsigned wipe_outdated_pvs:1;
-	unsigned filter_nodata_only:1;          /* only use filters that do not require data from the dev */

 	/*
 	 * Devices and filtering.
--- a/lib/config/config.c
+++ b/lib/config/config.c
@@ -503,10 +503,10 @@ int config_file_read_fd(struct dm_config_tree *cft, struct device *dev, dev_io_r
 {
 	char *fb, *fe;
 	int r = 0;
-	int sz, use_plain_read = 1;
+	int use_mmap = 1;
+	off_t mmap_offset = 0;
 	char *buf = NULL;
 	struct config_source *cs = dm_config_get_custom(cft);
-	size_t rsize;

 	if (!_is_file_based_config_source(cs->type)) {
 		log_error(INTERNAL_ERROR "config_file_read_fd: expected file, special file "
@@ -515,28 +515,26 @@ int config_file_read_fd(struct dm_config_tree *cft, struct device *dev, dev_io_r
 		return 0;
 	}

-	/* Only use plain read with regular files */
+	/* Only use mmap with regular files */
 	if (!(dev->flags & DEV_REGULAR) || size2)
-		use_plain_read = 0;
+		use_mmap = 0;

-	if (!(buf = malloc(size + size2))) {
-		log_error("Failed to allocate circular buffer.");
-		return 0;
-	}
-
-	if (use_plain_read) {
-		/* Note: also used for lvm.conf to read all settings */
-		for (rsize = 0; rsize < size; rsize += sz) {
-			do {
-				sz = read(dev_fd(dev), buf + rsize, size - rsize);
-			} while ((sz < 0) && ((errno == EINTR) || (errno == EAGAIN)));
-
-			if (sz < 0) {
-				log_sys_error("read", dev_name(dev));
-				goto out;
-			}
+	if (use_mmap) {
+		mmap_offset = offset % lvm_getpagesize();
+		/* memory map the file */
+		fb = mmap((caddr_t) 0, size + mmap_offset, PROT_READ,
+			  MAP_PRIVATE, dev_fd(dev), offset - mmap_offset);
+		if (fb == (caddr_t) (-1)) {
+			log_sys_error("mmap", dev_name(dev));
+			goto out;
 		}
+		fb = fb + mmap_offset;
 	} else {
+		if (!(buf = malloc(size + size2))) {
+			log_error("Failed to allocate circular buffer.");
+			return 0;
+		}
+
 		if (!dev_read_bytes(dev, offset, size, buf))
 			goto out;

@@ -544,9 +542,9 @@ int config_file_read_fd(struct dm_config_tree *cft, struct device *dev, dev_io_r
 			if (!dev_read_bytes(dev, offset2, size2, buf + size))
 				goto out;
 		}
-	}

-	fb = buf;
+		fb = buf;
+	}

 	/*
 	 * The checksum passed in is the checksum from the mda_header
@@ -575,7 +573,15 @@ int config_file_read_fd(struct dm_config_tree *cft, struct device *dev, dev_io_r
 	r = 1;

      out:
-	free(buf);
+	if (!use_mmap)
+		free(buf);
+	else {
+		/* unmap the file */
+		if (munmap(fb - mmap_offset, size + mmap_offset)) {
+			log_sys_error("munmap", dev_name(dev));
+			r = 0;
+		}
+	}

 	return r;
 }
--- a/lib/config/config_settings.h
+++ b/lib/config/config_settings.h
@@ -568,7 +568,7 @@ cfg(allocation_raid_stripe_all_devices_CFG, "raid_stripe_all_devices", allocatio
 	"stripes to use.\n"
 	"This was the default behaviour until release 2.02.162.\n")

-cfg(allocation_cache_pool_metadata_require_separate_pvs_CFG, "cache_pool_metadata_require_separate_pvs", allocation_CFG_SECTION, CFG_PROFILABLE | CFG_PROFILABLE_METADATA | CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, DEFAULT_CACHE_POOL_METADATA_REQUIRE_SEPARATE_PVS, vsn(2, 2, 106), NULL, 0, NULL,
+cfg(allocation_cache_pool_metadata_require_separate_pvs_CFG, "cache_pool_metadata_require_separate_pvs", allocation_CFG_SECTION, CFG_PROFILABLE | CFG_PROFILABLE_METADATA, CFG_TYPE_BOOL, DEFAULT_CACHE_POOL_METADATA_REQUIRE_SEPARATE_PVS, vsn(2, 2, 106), NULL, 0, NULL,
 	"Cache pool metadata and data will always use different PVs.\n")

 cfg(allocation_cache_pool_cachemode_CFG, "cache_pool_cachemode", allocation_CFG_SECTION, CFG_PROFILABLE | CFG_PROFILABLE_METADATA | CFG_DEFAULT_COMMENTED, CFG_TYPE_STRING, DEFAULT_CACHE_MODE, vsn(2, 2, 113), NULL, vsn(2, 2, 128),
@@ -625,8 +625,8 @@ cfg(allocation_cache_pool_max_chunks_CFG, "cache_pool_max_chunks", allocation_CF
 	"For cache target v1.9 the recommended maximumm is 1000000 chunks.\n"
 	"Using cache pool with more chunks may degrade cache performance.\n")

-cfg(allocation_thin_pool_metadata_require_separate_pvs_CFG, "thin_pool_metadata_require_separate_pvs", allocation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, DEFAULT_THIN_POOL_METADATA_REQUIRE_SEPARATE_PVS, vsn(2, 2, 89), NULL, 0, NULL,
-	"Thin pool metadata and data will always use different PVs.\n")
+cfg(allocation_thin_pool_metadata_require_separate_pvs_CFG, "thin_pool_metadata_require_separate_pvs", allocation_CFG_SECTION, 0, CFG_TYPE_BOOL, DEFAULT_THIN_POOL_METADATA_REQUIRE_SEPARATE_PVS, vsn(2, 2, 89), NULL, 0, NULL,
+	"Thin pool metdata and data will always use different PVs.\n")

 cfg(allocation_thin_pool_zero_CFG, "thin_pool_zero", allocation_CFG_SECTION, CFG_PROFILABLE | CFG_PROFILABLE_METADATA | CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, DEFAULT_THIN_POOL_ZERO, vsn(2, 2, 99), NULL, 0, NULL,
 	"Thin pool data chunks are zeroed before they are first used.\n"
@@ -657,9 +657,6 @@ cfg(allocation_thin_pool_chunk_size_policy_CFG, "thin_pool_chunk_size_policy", a
 	"    512KiB.\n"
 	"#\n")

-cfg(allocation_zero_metadata_CFG, "zero_metadata", allocation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, DEFAULT_ZERO_METADATA, vsn(2, 3, 10), NULL, 0, NULL,
-	"Zero whole metadata area before use with thin or cache pool.\n")
-
 cfg_runtime(allocation_thin_pool_chunk_size_CFG, "thin_pool_chunk_size", allocation_CFG_SECTION, CFG_PROFILABLE | CFG_PROFILABLE_METADATA | CFG_DEFAULT_UNDEFINED, CFG_TYPE_INT, vsn(2, 2, 99), 0, NULL,
 	"The minimal chunk size in KiB for thin pool volumes.\n"
 	"Larger chunk sizes may improve performance for plain thin volumes,\n"
@@ -1031,7 +1028,7 @@ cfg(global_mirror_segtype_default_CFG, "mirror_segtype_default", global_CFG_SECT
 	"    fashion in a cluster.\n"
 	"#\n")

-cfg(global_support_mirrored_mirror_log_CFG, "support_mirrored_mirror_log", global_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, 0, vsn(2, 3, 2), NULL, 0, NULL,
+cfg(global_support_mirrored_mirror_log_CFG, "support_mirrored_mirror_log", global_CFG_SECTION, 0, CFG_TYPE_BOOL, 0, vsn(2, 3, 2), NULL, 0, NULL,
 	"Enable mirrored 'mirror' log type for testing.\n"
 	"#\n"
 	"This type is deprecated to create or convert to but can\n"
@@ -1085,7 +1082,7 @@ cfg(global_lvdisplay_shows_full_device_path_CFG, "lvdisplay_shows_full_device_pa
 	"Previously this was always shown as /dev/vgname/lvname even when that\n"
 	"was never a valid path in the /dev filesystem.\n")

-cfg(global_event_activation_CFG, "event_activation", global_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, 1, vsn(2, 3, 1), 0, 0, NULL,
+cfg(global_event_activation_CFG, "event_activation", global_CFG_SECTION, 0, CFG_TYPE_BOOL, 1, vsn(2, 3, 1), 0, 0, NULL,
 	"Activate LVs based on system-generated device events.\n"
 	"When a device appears on the system, a system-generated event runs\n"
 	"the pvscan command to activate LVs if the new PV completes the VG.\n"
@@ -1289,7 +1286,7 @@ cfg(activation_udev_rules_CFG, "udev_rules", activation_CFG_SECTION, 0, CFG_TYPE
 	"active LVs itself. Manual intervention may be required if this\n"
 	"setting is changed while LVs are active.\n")

-cfg(activation_verify_udev_operations_CFG, "verify_udev_operations", activation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, DEFAULT_VERIFY_UDEV_OPERATIONS, vsn(2, 2, 86), NULL, 0, NULL,
+cfg(activation_verify_udev_operations_CFG, "verify_udev_operations", activation_CFG_SECTION, 0, CFG_TYPE_BOOL, DEFAULT_VERIFY_UDEV_OPERATIONS, vsn(2, 2, 86), NULL, 0, NULL,
 	"Use extra checks in LVM to verify udev operations.\n"
 	"This enables additional checks (and if necessary, repairs) on entries\n"
 	"in the device directory after udev has completed processing its\n"
@@ -1310,21 +1307,21 @@ cfg(activation_missing_stripe_filler_CFG, "missing_stripe_filler", activation_CF
 	"other than 'error' with mirrored or snapshotted volumes is likely to\n"
 	"result in data corruption.\n")

-cfg(activation_use_linear_target_CFG, "use_linear_target", activation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, DEFAULT_USE_LINEAR_TARGET, vsn(2, 2, 89), NULL, 0, NULL,
+cfg(activation_use_linear_target_CFG, "use_linear_target", activation_CFG_SECTION, 0, CFG_TYPE_BOOL, DEFAULT_USE_LINEAR_TARGET, vsn(2, 2, 89), NULL, 0, NULL,
 	"Use the linear target to optimize single stripe LVs.\n"
 	"When disabled, the striped target is used. The linear target is an\n"
 	"optimised version of the striped target that only handles a single\n"
 	"stripe.\n")

-cfg(activation_reserved_stack_CFG, "reserved_stack", activation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_INT, DEFAULT_RESERVED_STACK, vsn(1, 0, 0), NULL, 0, NULL,
+cfg(activation_reserved_stack_CFG, "reserved_stack", activation_CFG_SECTION, 0, CFG_TYPE_INT, DEFAULT_RESERVED_STACK, vsn(1, 0, 0), NULL, 0, NULL,
 	"Stack size in KiB to reserve for use while devices are suspended.\n"
 	"Insufficent reserve risks I/O deadlock during device suspension.\n")

-cfg(activation_reserved_memory_CFG, "reserved_memory", activation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_INT, DEFAULT_RESERVED_MEMORY, vsn(1, 0, 0), NULL, 0, NULL,
+cfg(activation_reserved_memory_CFG, "reserved_memory", activation_CFG_SECTION, 0, CFG_TYPE_INT, DEFAULT_RESERVED_MEMORY, vsn(1, 0, 0), NULL, 0, NULL,
 	"Memory size in KiB to reserve for use while devices are suspended.\n"
 	"Insufficent reserve risks I/O deadlock during device suspension.\n")

-cfg(activation_process_priority_CFG, "process_priority", activation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_INT, DEFAULT_PROCESS_PRIORITY, vsn(1, 0, 0), NULL, 0, NULL,
+cfg(activation_process_priority_CFG, "process_priority", activation_CFG_SECTION, 0, CFG_TYPE_INT, DEFAULT_PROCESS_PRIORITY, vsn(1, 0, 0), NULL, 0, NULL,
 	"Nice value used while devices are suspended.\n"
 	"Use a high priority so that LVs are suspended\n"
 	"for the shortest possible time.\n")
@@ -1433,7 +1430,7 @@ cfg(activation_error_when_full_CFG, "error_when_full", activation_CFG_SECTION, C
 	"thin pool data space is extended. New thin pools are assigned the\n"
 	"behavior defined here.\n")

-cfg(activation_readahead_CFG, "readahead", activation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_STRING, DEFAULT_READ_AHEAD, vsn(1, 0, 23), NULL, 0, NULL,
+cfg(activation_readahead_CFG, "readahead", activation_CFG_SECTION, 0, CFG_TYPE_STRING, DEFAULT_READ_AHEAD, vsn(1, 0, 23), NULL, 0, NULL,
 	"Setting to use when there is no readahead setting in metadata.\n"
 	"#\n"
 	"Accepted values:\n"
@@ -1561,7 +1558,7 @@ cfg(activation_thin_pool_autoextend_percent_CFG, "thin_pool_autoextend_percent",
 	"thin_pool_autoextend_percent = 20\n"
 	"#\n")

-cfg(activation_vdo_pool_autoextend_threshold_CFG, "vdo_pool_autoextend_threshold", activation_CFG_SECTION, CFG_PROFILABLE | CFG_PROFILABLE_METADATA | CFG_DEFAULT_COMMENTED, CFG_TYPE_INT, DEFAULT_VDO_POOL_AUTOEXTEND_THRESHOLD, VDO_1ST_VSN, NULL, 0, NULL,
+cfg(activation_vdo_pool_autoextend_threshold_CFG, "vdo_pool_autoextend_threshold", activation_CFG_SECTION, CFG_PROFILABLE | CFG_PROFILABLE_METADATA, CFG_TYPE_INT, DEFAULT_VDO_POOL_AUTOEXTEND_THRESHOLD, VDO_1ST_VSN, NULL, 0, NULL,
 	"Auto-extend a VDO pool when its usage exceeds this percent.\n"
 	"Setting this to 100 disables automatic extension.\n"
 	"The minimum value is 50 (a smaller value is treated as 50.)\n"
@@ -1601,7 +1598,7 @@ cfg_array(activation_mlock_filter_CFG, "mlock_filter", activation_CFG_SECTION, C
 	"mlock_filter = [ \"locale/locale-archive\", \"gconv/gconv-modules.cache\" ]\n"
 	"#\n")

-cfg(activation_use_mlockall_CFG, "use_mlockall", activation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_BOOL, DEFAULT_USE_MLOCKALL, vsn(2, 2, 62), NULL, 0, NULL,
+cfg(activation_use_mlockall_CFG, "use_mlockall", activation_CFG_SECTION, 0, CFG_TYPE_BOOL, DEFAULT_USE_MLOCKALL, vsn(2, 2, 62), NULL, 0, NULL,
 	"Use the old behavior of mlockall to pin all memory.\n"
 	"Prior to version 2.02.62, LVM used mlockall() to pin the whole\n"
 	"process's memory while activating devices.\n")
@@ -1611,7 +1608,7 @@ cfg(activation_monitoring_CFG, "monitoring", activation_CFG_SECTION, 0, CFG_TYPE
 	"The --ignoremonitoring option overrides this setting.\n"
 	"When enabled, LVM will ask dmeventd to monitor activated LVs.\n")

-cfg(activation_polling_interval_CFG, "polling_interval", activation_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_INT, DEFAULT_INTERVAL, vsn(2, 2, 63), NULL, 0, NULL,
+cfg(activation_polling_interval_CFG, "polling_interval", activation_CFG_SECTION, 0, CFG_TYPE_INT, DEFAULT_INTERVAL, vsn(2, 2, 63), NULL, 0, NULL,
 	"Check pvmove or lvconvert progress at this interval (seconds).\n"
 	"When pvmove or lvconvert must wait for the kernel to finish\n"
 	"synchronising or merging data, they check and report progress at\n"
@@ -2050,7 +2047,7 @@ cfg(report_two_word_unknown_device_CFG, "two_word_unknown_device", report_CFG_SE
 	"Use the two words 'unknown device' in place of '[unknown]'.\n"
 	"This is displayed when the device for a PV is not known.\n")

-cfg(dmeventd_mirror_library_CFG, "mirror_library", dmeventd_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_STRING, DEFAULT_DMEVENTD_MIRROR_LIB, vsn(1, 2, 3), NULL, 0, NULL,
+cfg(dmeventd_mirror_library_CFG, "mirror_library", dmeventd_CFG_SECTION, 0, CFG_TYPE_STRING, DEFAULT_DMEVENTD_MIRROR_LIB, vsn(1, 2, 3), NULL, 0, NULL,
 	"The library dmeventd uses when monitoring a mirror device.\n"
 	"libdevmapper-event-lvm2mirror.so attempts to recover from\n"
 	"failures. It removes failed devices from a volume group and\n"
@@ -2059,13 +2056,13 @@ cfg(dmeventd_mirror_library_CFG, "mirror_library", dmeventd_CFG_SECTION, CFG_DEF

 cfg(dmeventd_raid_library_CFG, "raid_library", dmeventd_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_STRING, DEFAULT_DMEVENTD_RAID_LIB, vsn(2, 2, 87), NULL, 0, NULL, NULL)

-cfg(dmeventd_snapshot_library_CFG, "snapshot_library", dmeventd_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_STRING, DEFAULT_DMEVENTD_SNAPSHOT_LIB, vsn(1, 2, 26), NULL, 0, NULL,
+cfg(dmeventd_snapshot_library_CFG, "snapshot_library", dmeventd_CFG_SECTION, 0, CFG_TYPE_STRING, DEFAULT_DMEVENTD_SNAPSHOT_LIB, vsn(1, 2, 26), NULL, 0, NULL,
 	"The library dmeventd uses when monitoring a snapshot device.\n"
 	"libdevmapper-event-lvm2snapshot.so monitors the filling of snapshots\n"
 	"and emits a warning through syslog when the usage exceeds 80%. The\n"
 	"warning is repeated when 85%, 90% and 95% of the snapshot is filled.\n")

-cfg(dmeventd_thin_library_CFG, "thin_library", dmeventd_CFG_SECTION, CFG_DEFAULT_COMMENTED, CFG_TYPE_STRING, DEFAULT_DMEVENTD_THIN_LIB, vsn(2, 2, 89), NULL, 0, NULL,
+cfg(dmeventd_thin_library_CFG, "thin_library", dmeventd_CFG_SECTION, 0, CFG_TYPE_STRING, DEFAULT_DMEVENTD_THIN_LIB, vsn(2, 2, 89), NULL, 0, NULL,
 	"The library dmeventd uses when monitoring a thin device.\n"
 	"libdevmapper-event-lvm2thin.so monitors the filling of a pool\n"
 	"and emits a warning through syslog when the usage exceeds 80%. The\n"
--- a/lib/config/defaults.h
+++ b/lib/config/defaults.h
@@ -129,7 +129,6 @@
 #define DEFAULT_THIN_POOL_DISCARDS "passdown"
 #define DEFAULT_THIN_POOL_ZERO 1
 #define DEFAULT_POOL_METADATA_SPARE 1 /* thin + cache */
-#define DEFAULT_ZERO_METADATA 1		/* thin + cache */

 #ifdef CACHE_CHECK_NEEDS_CHECK
 #  define DEFAULT_CACHE_CHECK_OPTION1 "-q"
@@ -165,7 +164,7 @@
 #define DEFAULT_VDO_INDEX_MEMORY_SIZE_MB	(DM_VDO_INDEX_MEMORY_SIZE_MINIMUM_MB)
 #define DEFAULT_VDO_SLAB_SIZE_MB	(2 * 1024)  // 2GiB ... 19 slabbits
 #define DEFAULT_VDO_ACK_THREADS		(1)
-#define DEFAULT_VDO_BIO_THREADS		(4)
+#define DEFAULT_VDO_BIO_THREADS		(1)
 #define DEFAULT_VDO_BIO_ROTATION	(64)
 #define DEFAULT_VDO_CPU_THREADS		(2)
 #define DEFAULT_VDO_HASH_ZONE_THREADS	(1)
--- a/lib/device/bcache-utils.c
+++ b/lib/device/bcache-utils.c
@@ -39,32 +39,32 @@ static uint64_t _min(uint64_t lhs, uint64_t rhs)

 //----------------------------------------------------------------

-void bcache_prefetch_bytes(struct bcache *cache, int di, uint64_t start, size_t len)
+void bcache_prefetch_bytes(struct bcache *cache, int fd, uint64_t start, size_t len)
 {
 	block_address bb, be;

 	byte_range_to_block_range(cache, start, len, &bb, &be);
 	while (bb < be) {
-		bcache_prefetch(cache, di, bb);
+		bcache_prefetch(cache, fd, bb);
 		bb++;
 	}
 }

 //----------------------------------------------------------------

-bool bcache_read_bytes(struct bcache *cache, int di, uint64_t start, size_t len, void *data)
+bool bcache_read_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, void *data)
 {
 	struct block *b;
 	block_address bb, be;
 	uint64_t block_size = bcache_block_sectors(cache) << SECTOR_SHIFT;
 	uint64_t block_offset = start % block_size;

-	bcache_prefetch_bytes(cache, di, start, len);
+	bcache_prefetch_bytes(cache, fd, start, len);

 	byte_range_to_block_range(cache, start, len, &bb, &be);

 	for (; bb != be; bb++) {
-        	if (!bcache_get(cache, di, bb, 0, &b))
+        	if (!bcache_get(cache, fd, bb, 0, &b))
 			return false;

 		size_t blen = _min(block_size - block_offset, len);
@@ -79,21 +79,6 @@ bool bcache_read_bytes(struct bcache *cache, int di, uint64_t start, size_t len,
 	return true;
 }

-bool bcache_invalidate_bytes(struct bcache *cache, int di, uint64_t start, size_t len)
-{
-	block_address bb, be;
-	bool result = true;
-
-	byte_range_to_block_range(cache, start, len, &bb, &be);
-
-	for (; bb != be; bb++) {
-		if (!bcache_invalidate(cache, di, bb))
-			result = false;
-	}
-
-	return result;
-}
-
 //----------------------------------------------------------------

 // Writing bytes and zeroing bytes are very similar, so we factor out
@@ -101,8 +86,8 @@ bool bcache_invalidate_bytes(struct bcache *cache, int di, uint64_t start, size_
 
 struct updater;

-typedef bool (*partial_update_fn)(struct updater *u, int di, block_address bb, uint64_t offset, size_t len);
-typedef bool (*whole_update_fn)(struct updater *u, int di, block_address bb, block_address be);
+typedef bool (*partial_update_fn)(struct updater *u, int fd, block_address bb, uint64_t offset, size_t len);
+typedef bool (*whole_update_fn)(struct updater *u, int fd, block_address bb, block_address be);

 struct updater {
 	struct bcache *cache;
@@ -111,7 +96,7 @@ struct updater {
 	void *data;
 };

-static bool _update_bytes(struct updater *u, int di, uint64_t start, size_t len)
+static bool _update_bytes(struct updater *u, int fd, uint64_t start, size_t len)
 {
        struct bcache *cache = u->cache;
 	block_address bb, be;
@@ -124,12 +109,12 @@ static bool _update_bytes(struct updater *u, int di, uint64_t start, size_t len)
 	// If the last block is partial, we will require a read, so let's 
 	// prefetch it.
 	if ((start + len) % block_size)
-        	bcache_prefetch(cache, di, (start + len) / block_size);
+        	bcache_prefetch(cache, fd, (start + len) / block_size);

 	// First block may be partial
 	if (block_offset) {
        	size_t blen = _min(block_size - block_offset, len);
-		if (!u->partial_fn(u, di, bb, block_offset, blen))
+		if (!u->partial_fn(u, fd, bb, block_offset, blen))
        		return false;

 		len -= blen;
@@ -141,7 +126,7 @@ static bool _update_bytes(struct updater *u, int di, uint64_t start, size_t len)

        // Now we write out a set of whole blocks
        nr_whole = len / block_size;
-        if (!u->whole_fn(u, di, bb, bb + nr_whole))
+        if (!u->whole_fn(u, fd, bb, bb + nr_whole))
                return false;

 	bb += nr_whole;
@@ -151,17 +136,17 @@ static bool _update_bytes(struct updater *u, int di, uint64_t start, size_t len)
        	return true;

        // Finally we write a partial end block
-        return u->partial_fn(u, di, bb, 0, len);
+        return u->partial_fn(u, fd, bb, 0, len);
 }

 //----------------------------------------------------------------

-static bool _write_partial(struct updater *u, int di, block_address bb,
+static bool _write_partial(struct updater *u, int fd, block_address bb,
                           uint64_t offset, size_t len)
 {
 	struct block *b;

-	if (!bcache_get(u->cache, di, bb, GF_DIRTY, &b))
+	if (!bcache_get(u->cache, fd, bb, GF_DIRTY, &b))
 		return false;

 	memcpy(((unsigned char *) b->data) + offset, u->data, len);
@@ -171,7 +156,7 @@ static bool _write_partial(struct updater *u, int di, block_address bb,
 	return true;
 }

-static bool _write_whole(struct updater *u, int di, block_address bb, block_address be)
+static bool _write_whole(struct updater *u, int fd, block_address bb, block_address be)
 {
 	struct block *b;
 	uint64_t block_size = bcache_block_sectors(u->cache) << SECTOR_SHIFT;
@@ -179,7 +164,7 @@ static bool _write_whole(struct updater *u, int di, block_address bb, block_addr
 	for (; bb != be; bb++) {
        	// We don't need to read the block since we are overwriting
        	// it completely.
-		if (!bcache_get(u->cache, di, bb, GF_ZERO, &b))
+		if (!bcache_get(u->cache, fd, bb, GF_ZERO, &b))
        		return false;
 		memcpy(b->data, u->data, block_size);
 		u->data = ((unsigned char *) u->data) + block_size;
@@ -189,7 +174,7 @@ static bool _write_whole(struct updater *u, int di, block_address bb, block_addr
 	return true;
 }

-bool bcache_write_bytes(struct bcache *cache, int di, uint64_t start, size_t len, void *data)
+bool bcache_write_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, void *data)
 {
        struct updater u;

@@ -198,16 +183,16 @@ bool bcache_write_bytes(struct bcache *cache, int di, uint64_t start, size_t len
        u.whole_fn = _write_whole;
        u.data = data;

-	return _update_bytes(&u, di, start, len);
+	return _update_bytes(&u, fd, start, len);
 }

 //----------------------------------------------------------------

-static bool _zero_partial(struct updater *u, int di, block_address bb, uint64_t offset, size_t len)
+static bool _zero_partial(struct updater *u, int fd, block_address bb, uint64_t offset, size_t len)
 {
 	struct block *b;

-	if (!bcache_get(u->cache, di, bb, GF_DIRTY, &b))
+	if (!bcache_get(u->cache, fd, bb, GF_DIRTY, &b))
 		return false;

 	memset(((unsigned char *) b->data) + offset, 0, len);
@@ -216,12 +201,12 @@ static bool _zero_partial(struct updater *u, int di, block_address bb, uint64_t
 	return true;
 }

-static bool _zero_whole(struct updater *u, int di, block_address bb, block_address be)
+static bool _zero_whole(struct updater *u, int fd, block_address bb, block_address be)
 {
 	struct block *b;

 	for (; bb != be; bb++) {
-		if (!bcache_get(u->cache, di, bb, GF_ZERO, &b))
+		if (!bcache_get(u->cache, fd, bb, GF_ZERO, &b))
        		return false;
        	bcache_put(b);
 	}
@@ -229,7 +214,7 @@ static bool _zero_whole(struct updater *u, int di, block_address bb, block_addre
 	return true;
 }

-bool bcache_zero_bytes(struct bcache *cache, int di, uint64_t start, size_t len)
+bool bcache_zero_bytes(struct bcache *cache, int fd, uint64_t start, size_t len)
 {
        struct updater u;

@@ -238,17 +223,17 @@ bool bcache_zero_bytes(struct bcache *cache, int di, uint64_t start, size_t len)
        u.whole_fn = _zero_whole;
        u.data = NULL;

-	return _update_bytes(&u, di, start, len);
+	return _update_bytes(&u, fd, start, len);
 }

 //----------------------------------------------------------------

-static bool _set_partial(struct updater *u, int di, block_address bb, uint64_t offset, size_t len)
+static bool _set_partial(struct updater *u, int fd, block_address bb, uint64_t offset, size_t len)
 {
 	struct block *b;
 	uint8_t val = *((uint8_t *) u->data);

-	if (!bcache_get(u->cache, di, bb, GF_DIRTY, &b))
+	if (!bcache_get(u->cache, fd, bb, GF_DIRTY, &b))
 		return false;

 	memset(((unsigned char *) b->data) + offset, val, len);
@@ -257,14 +242,14 @@ static bool _set_partial(struct updater *u, int di, block_address bb, uint64_t o
 	return true;
 }

-static bool _set_whole(struct updater *u, int di, block_address bb, block_address be)
+static bool _set_whole(struct updater *u, int fd, block_address bb, block_address be)
 {
 	struct block *b;
 	uint8_t val = *((uint8_t *) u->data);
        uint64_t len = bcache_block_sectors(u->cache) * 512;

 	for (; bb != be; bb++) {
-		if (!bcache_get(u->cache, di, bb, GF_ZERO, &b))
+		if (!bcache_get(u->cache, fd, bb, GF_ZERO, &b))
        		return false;
        	memset((unsigned char *) b->data, val, len);
        	bcache_put(b);
@@ -273,7 +258,7 @@ static bool _set_whole(struct updater *u, int di, block_address bb, block_addres
 	return true;
 }

-bool bcache_set_bytes(struct bcache *cache, int di, uint64_t start, size_t len, uint8_t val)
+bool bcache_set_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, uint8_t val)
 {
        struct updater u;

@@ -282,6 +267,6 @@ bool bcache_set_bytes(struct bcache *cache, int di, uint64_t start, size_t len,
        u.whole_fn = _set_whole;
        u.data = &val;

-	return _update_bytes(&u, di, start, len);
+	return _update_bytes(&u, fd, start, len);
 }

--- a/lib/device/bcache.c
+++ b/lib/device/bcache.c
@@ -33,11 +33,6 @@

 #define SECTOR_SHIFT 9L

-#define FD_TABLE_INC 1024
-static int _fd_table_size;
-static int *_fd_table;
-
-
 //----------------------------------------------------------------

 static void log_sys_warn(const char *call)
@@ -66,17 +61,23 @@ struct control_block {
 struct cb_set {
 	struct dm_list free;
 	struct dm_list allocated;
-	struct control_block vec[];
+	struct control_block *vec;
 } control_block_set;

 static struct cb_set *_cb_set_create(unsigned nr)
 {
-	unsigned i;
-	struct cb_set *cbs = malloc(sizeof(*cbs) + nr * sizeof(*cbs->vec));
+	int i;
+	struct cb_set *cbs = malloc(sizeof(*cbs));

-	if (!cbs->vec)
+	if (!cbs)
 		return NULL;

+	cbs->vec = malloc(nr * sizeof(*cbs->vec));
+	if (!cbs->vec) {
+		free(cbs);
+		return NULL;
+	}
+
 	dm_list_init(&cbs->free);
 	dm_list_init(&cbs->allocated);

@@ -96,6 +97,7 @@ static void _cb_set_destroy(struct cb_set *cbs)
 		return;
 	}

+	free(cbs->vec);
 	free(cbs);
 }

@@ -127,18 +129,18 @@ static struct control_block *_iocb_to_cb(struct iocb *icb)
 //----------------------------------------------------------------

 struct async_engine {
-	struct io_engine e;
+	struct io_engine_ e;
 	io_context_t aio_context;
 	struct cb_set *cbs;
 	unsigned page_mask;
 };

-static struct async_engine *_to_async(struct io_engine *e)
+static struct async_engine *_to_async(struct io_engine_ *e)
 {
 	return container_of(e, struct async_engine, e);
 }

-static void _async_destroy(struct io_engine *ioe)
+static void _async_destroy(struct io_engine_ *ioe)
 {
 	int r;
 	struct async_engine *e = _to_async(ioe);
@@ -153,11 +155,11 @@ static void _async_destroy(struct io_engine *ioe)
 	free(e);
 }

-static int _last_byte_di;
+static int _last_byte_fd;
 static uint64_t _last_byte_offset;
 static int _last_byte_sector_size;

-static bool _async_issue(struct io_engine *ioe, enum dir d, int di,
+static bool _async_issue(struct io_engine_ *ioe, enum dir d, int fd,
 			 sector_t sb, sector_t se, void *data, void *context)
 {
 	int r;
@@ -181,7 +183,7 @@ static bool _async_issue(struct io_engine *ioe, enum dir d, int di,
 	/*
 	 * If bcache block goes past where lvm wants to write, then clamp it.
 	 */
-	if ((d == DIR_WRITE) && _last_byte_offset && (di == _last_byte_di)) {
+	if ((d == DIR_WRITE) && _last_byte_offset && (fd == _last_byte_fd)) {
 		if (offset > _last_byte_offset) {
 			log_error("Limit write at %llu len %llu beyond last byte %llu",
 				  (unsigned long long)offset,
@@ -266,7 +268,7 @@ static bool _async_issue(struct io_engine *ioe, enum dir d, int di,

 	memset(&cb->cb, 0, sizeof(cb->cb));

-	cb->cb.aio_fildes = (int) _fd_table[di];
+	cb->cb.aio_fildes = (int) fd;
 	cb->cb.u.c.buf = data;
 	cb->cb.u.c.offset = offset;
 	cb->cb.u.c.nbytes = nbytes;
@@ -274,15 +276,13 @@ static bool _async_issue(struct io_engine *ioe, enum dir d, int di,

 #if 0
 	if (d == DIR_READ) {
-		log_debug("io R off %llu bytes %llu di %d fd %d",
+		log_debug("io R off %llu bytes %llu",
 			  (unsigned long long)cb->cb.u.c.offset,
-			  (unsigned long long)cb->cb.u.c.nbytes,
-			  di, _fd_table[di]);
+			  (unsigned long long)cb->cb.u.c.nbytes);
 	} else {
-		log_debug("io W off %llu bytes %llu di %d fd %d",
+		log_debug("io W off %llu bytes %llu",
 			  (unsigned long long)cb->cb.u.c.offset,
-			  (unsigned long long)cb->cb.u.c.nbytes,
-			  di, _fd_table[di]);
+			  (unsigned long long)cb->cb.u.c.nbytes);
 	}
 #endif

@@ -310,7 +310,7 @@ static bool _async_issue(struct io_engine *ioe, enum dir d, int di,
 #define MAX_IO 256
 #define MAX_EVENT 64

-static bool _async_wait(struct io_engine *ioe, io_complete_fn fn)
+static bool _async_wait(struct io_engine_ *ioe, io_complete_fn fn)
 {
 	int i, r;
 	struct io_event event[MAX_EVENT];
@@ -318,7 +318,9 @@ static bool _async_wait(struct io_engine *ioe, io_complete_fn fn)
 	struct async_engine *e = _to_async(ioe);

 	memset(&event, 0, sizeof(event));
-	r = io_getevents(e->aio_context, 1, MAX_EVENT, event, NULL);
+	do {
+		r = io_getevents(e->aio_context, 1, MAX_EVENT, event, NULL);
+	} while (r == -EINTR);

 	if (r < 0) {
 		log_sys_warn("io_getevents");
@@ -351,12 +353,12 @@ static bool _async_wait(struct io_engine *ioe, io_complete_fn fn)
 	return true;
 }

-static unsigned _async_max_io(struct io_engine *e)
+static unsigned _async_max_io(struct io_engine_ *e)
 {
 	return MAX_IO;
 }

-struct io_engine *create_async_io_engine(void)
+struct io_engine_ *create_async_io_engine_(void)
 {
 	int r;
 	struct async_engine *e = malloc(sizeof(*e));
@@ -397,22 +399,22 @@ struct sync_io {
 };

 struct sync_engine {
-	struct io_engine e;
+	struct io_engine_ e;
 	struct dm_list complete;
 };

-static struct sync_engine *_to_sync(struct io_engine *e)
+static struct sync_engine *_to_sync(struct io_engine_ *e)
 {
        return container_of(e, struct sync_engine, e);
 }

-static void _sync_destroy(struct io_engine *ioe)
+static void _sync_destroy(struct io_engine_ *ioe)
 {
        struct sync_engine *e = _to_sync(ioe);
        free(e);
 }

-static bool _sync_issue(struct io_engine *ioe, enum dir d, int di,
+static bool _sync_issue(struct io_engine_ *ioe, enum dir d, int fd,
                        sector_t sb, sector_t se, void *data, void *context)
 {
 	int rv;
@@ -428,7 +430,7 @@ static bool _sync_issue(struct io_engine *ioe, enum dir d, int di,
 	}

 	where = sb * 512;
-	off = lseek(_fd_table[di], where, SEEK_SET);
+	off = lseek(fd, where, SEEK_SET);
 	if (off == (off_t) -1) {
 		log_warn("Device seek error %d for offset %llu", errno, (unsigned long long)where);
 		free(io);
@@ -443,7 +445,7 @@ static bool _sync_issue(struct io_engine *ioe, enum dir d, int di,
 	/*
 	 * If bcache block goes past where lvm wants to write, then clamp it.
 	 */
-	if ((d == DIR_WRITE) && _last_byte_offset && (di == _last_byte_di)) {
+	if ((d == DIR_WRITE) && _last_byte_offset && (fd == _last_byte_fd)) {
 		uint64_t offset = where;
 		uint64_t nbytes = len;
 		sector_t limit_nbytes = 0;
@@ -513,7 +515,6 @@ static bool _sync_issue(struct io_engine *ioe, enum dir d, int di,
 					  (unsigned long long)limit_nbytes,
 					  (unsigned long long)extra_nbytes,
 					  (unsigned long long)_last_byte_sector_size);
-				free(io);
 				return false;
 			}
 		}
@@ -524,9 +525,9 @@ static bool _sync_issue(struct io_engine *ioe, enum dir d, int di,

 	while (pos < len) {
 		if (d == DIR_READ)
-			rv = read(_fd_table[di], (char *)data + pos, len - pos);
+			rv = read(fd, (char *)data + pos, len - pos);
 		else
-			rv = write(_fd_table[di], (char *)data + pos, len - pos);
+			rv = write(fd, (char *)data + pos, len - pos);

 		if (rv == -1 && errno == EINTR)
 			continue;
@@ -569,7 +570,7 @@ static bool _sync_issue(struct io_engine *ioe, enum dir d, int di,
 	return true;
 }

-static bool _sync_wait(struct io_engine *ioe, io_complete_fn fn)
+static bool _sync_wait(struct io_engine_ *ioe, io_complete_fn fn)
 {
        struct sync_io *io, *tmp;
 	struct sync_engine *e = _to_sync(ioe);
@@ -583,12 +584,12 @@ static bool _sync_wait(struct io_engine *ioe, io_complete_fn fn)
 	return true;
 }

-static unsigned _sync_max_io(struct io_engine *e)
+static unsigned _sync_max_io(struct io_engine_ *e)
 {
        return 1;
 }

-struct io_engine *create_sync_io_engine(void)
+struct io_engine_ *create_sync_io_engine_(void)
 {
 	struct sync_engine *e = malloc(sizeof(*e));

@@ -652,7 +653,7 @@ struct bcache {
 	uint64_t nr_cache_blocks;
 	unsigned max_io;

-	struct io_engine *engine;
+	struct io_engine_ *engine;

 	void *raw_data;
 	struct block *raw_blocks;
@@ -686,7 +687,7 @@ struct bcache {
 //----------------------------------------------------------------

 struct key_parts {
-	uint32_t di;
+	uint32_t fd;
 	uint64_t b;
 } __attribute__ ((packed));

@@ -695,12 +696,12 @@ union key {
        uint8_t bytes[12];
 };

-static struct block *_block_lookup(struct bcache *cache, int di, uint64_t i)
+static struct block *_block_lookup(struct bcache *cache, int fd, uint64_t i)
 {
 	union key k;
 	union radix_value v;

-	k.parts.di = di;
+	k.parts.fd = fd;
 	k.parts.b = i;

 	if (radix_tree_lookup(cache->rtree, k.bytes, k.bytes + sizeof(k.bytes), &v))
@@ -714,7 +715,7 @@ static bool _block_insert(struct block *b)
        union key k;
        union radix_value v;

-        k.parts.di = b->di;
+        k.parts.fd = b->fd;
        k.parts.b = b->index;
        v.ptr = b;

@@ -725,7 +726,7 @@ static void _block_remove(struct block *b)
 {
        union key k;

-        k.parts.di = b->di;
+        k.parts.fd = b->fd;
        k.parts.b = b->index;

 	radix_tree_remove(b->cache->rtree, k.bytes, k.bytes + sizeof(k.bytes));
@@ -867,7 +868,7 @@ static void _issue_low_level(struct block *b, enum dir d)

 	dm_list_move(&cache->io_pending, &b->list);

-	if (!cache->engine->issue(cache->engine, d, b->di, sb, se, b->data, b)) {
+	if (!cache->engine->issue(cache->engine, d, b->fd, sb, se, b->data, b)) {
 		/* FIXME: if io_submit() set an errno, return that instead of EIO? */
 		_complete_io(b, -EIO);
 		return;
@@ -943,26 +944,21 @@ static struct block *_find_unused_clean_block(struct bcache *cache)
 	return NULL;
 }

-static struct block *_new_block(struct bcache *cache, int di, block_address i, bool can_wait)
+static struct block *_new_block(struct bcache *cache, int fd, block_address i, bool can_wait)
 {
 	struct block *b;

 	b = _alloc_block(cache);
-	while (!b) {
+	while (!b && !dm_list_empty(&cache->clean)) {
 		b = _find_unused_clean_block(cache);
 		if (!b) {
 			if (can_wait) {
 				if (dm_list_empty(&cache->io_pending))
 					_writeback(cache, 16);  // FIXME: magic number
-				_wait_all(cache);
-				if (dm_list_size(&cache->errored) >= cache->max_io) {
-					log_debug("bcache no new blocks for di %d index %u with >%d errors.",
-						  di, (uint32_t) i, cache->max_io);
-					return NULL;
-				}
+				_wait_io(cache);
 			} else {
-				log_debug("bcache no new blocks for di %d index %u",
-					  di, (uint32_t) i);
+				log_debug("bcache no new blocks for fd %d index %u",
+					  fd, (uint32_t) i);
 				return NULL;
 			}
 		}
@@ -971,7 +967,7 @@ static struct block *_new_block(struct bcache *cache, int di, block_address i, b
 	if (b) {
 		dm_list_init(&b->list);
 		b->flags = 0;
-		b->di = di;
+		b->fd = fd;
 		b->index = i;
 		b->ref_count = 0;
 		b->error = 0;
@@ -1017,10 +1013,10 @@ static void _miss(struct bcache *cache, unsigned flags)
 }

 static struct block *_lookup_or_read_block(struct bcache *cache,
-				  	   int di, block_address i,
+				  	   int fd, block_address i,
 					   unsigned flags)
 {
-	struct block *b = _block_lookup(cache, di, i);
+	struct block *b = _block_lookup(cache, fd, i);

 	if (b) {
 		// FIXME: this is insufficient.  We need to also catch a read
@@ -1045,7 +1041,7 @@ static struct block *_lookup_or_read_block(struct bcache *cache,
 	} else {
 		_miss(cache, flags);

-		b = _new_block(cache, di, i, true);
+		b = _new_block(cache, fd, i, true);
 		if (b) {
 			if (flags & GF_ZERO)
 				_zero_block(b);
@@ -1085,12 +1081,11 @@ static void _preemptive_writeback(struct bcache *cache)
 * Public interface
 *--------------------------------------------------------------*/
 struct bcache *bcache_create(sector_t block_sectors, unsigned nr_cache_blocks,
-			     struct io_engine *engine)
+			     struct io_engine_ *engine)
 {
 	struct bcache *cache;
 	unsigned max_io = engine->max_io(engine);
 	long pgsize = sysconf(_SC_PAGESIZE);
-	int i;

 	if (pgsize < 0) {
 		log_warn("WARNING: _SC_PAGESIZE returns negative value.");
@@ -1151,18 +1146,6 @@ struct bcache *bcache_create(sector_t block_sectors, unsigned nr_cache_blocks,
 		return NULL;
 	}

-	_fd_table_size = FD_TABLE_INC;
-
-	if (!(_fd_table = malloc(sizeof(int) * _fd_table_size))) {
-		cache->engine->destroy(cache->engine);
-		radix_tree_destroy(cache->rtree);
-		free(cache);
-		return NULL;
-	}
-
-	for (i = 0; i < _fd_table_size; i++)
-		_fd_table[i] = -1;
-
 	return cache;
 }

@@ -1178,9 +1161,6 @@ void bcache_destroy(struct bcache *cache)
 	radix_tree_destroy(cache->rtree);
 	cache->engine->destroy(cache->engine);
 	free(cache);
-	free(_fd_table);
-	_fd_table = NULL;
-	_fd_table_size = 0;
 }

 sector_t bcache_block_sectors(struct bcache *cache)
@@ -1198,13 +1178,13 @@ unsigned bcache_max_prefetches(struct bcache *cache)
 	return cache->max_io;
 }

-void bcache_prefetch(struct bcache *cache, int di, block_address i)
+void bcache_prefetch(struct bcache *cache, int fd, block_address i)
 {
-	struct block *b = _block_lookup(cache, di, i);
+	struct block *b = _block_lookup(cache, fd, i);

 	if (!b) {
 		if (cache->nr_io_pending < cache->max_io) {
-			b = _new_block(cache, di, i, false);
+			b = _new_block(cache, fd, i, false);
 			if (b) {
 				cache->prefetches++;
 				_issue_read(b);
@@ -1222,15 +1202,12 @@ static void _recycle_block(struct bcache *cache, struct block *b)
 	_free_block(b);
 }

-bool bcache_get(struct bcache *cache, int di, block_address i,
+bool bcache_get(struct bcache *cache, int fd, block_address i,
 	        unsigned flags, struct block **result)
 {
 	struct block *b;

-	if (di >= _fd_table_size)
-		goto bad;
-
-	b = _lookup_or_read_block(cache, di, i, flags);
+	b = _lookup_or_read_block(cache, fd, i, flags);
 	if (b) {
 		if (b->error) {
 			if (b->io_dir == DIR_READ) {
@@ -1249,10 +1226,10 @@ bool bcache_get(struct bcache *cache, int di, block_address i,
 		*result = b;
 		return true;
 	}
-bad:
+
 	*result = NULL;

-	log_error("bcache failed to get block %u di %d", (uint32_t) i, di);
+	log_error("bcache failed to get block %u fd %d", (uint32_t) i, fd);
 	return false;
 }

@@ -1316,7 +1293,7 @@ static bool _invalidate_block(struct bcache *cache, struct block *b)

 	if (b->ref_count) {
 		log_warn("bcache_invalidate: block (%d, %llu) still held",
-			 b->di, (unsigned long long) b->index);
+			 b->fd, (unsigned long long) b->index);
 		return false;
 	}

@@ -1333,9 +1310,9 @@ static bool _invalidate_block(struct bcache *cache, struct block *b)
 	return true;
 }

-bool bcache_invalidate(struct bcache *cache, int di, block_address i)
+bool bcache_invalidate(struct bcache *cache, int fd, block_address i)
 {
-	return _invalidate_block(cache, _block_lookup(cache, di, i));
+	return _invalidate_block(cache, _block_lookup(cache, fd, i));
 }

 //----------------------------------------------------------------
@@ -1364,14 +1341,14 @@ static bool _invalidate_v(struct radix_tree_iterator *it,

 	if (b->error || _test_flags(b, BF_DIRTY)) {
        	log_warn("bcache_invalidate: block (%d, %llu) still dirty",
-                         b->di, (unsigned long long) b->index);
+                         b->fd, (unsigned long long) b->index);
        	iit->success = false;
        	return true;
 	}

 	if (b->ref_count) {
 		log_warn("bcache_invalidate: block (%d, %llu) still held",
-			 b->di, (unsigned long long) b->index);
+			 b->fd, (unsigned long long) b->index);
 		iit->success = false;
 		return true;
 	}
@@ -1384,138 +1361,42 @@ static bool _invalidate_v(struct radix_tree_iterator *it,
 	return true;
 }

-bool bcache_invalidate_di(struct bcache *cache, int di)
+bool bcache_invalidate_fd(struct bcache *cache, int fd)
 {
        union key k;
 	struct invalidate_iterator it;

-	k.parts.di = di;
+	k.parts.fd = fd;

 	it.it.visit = _writeback_v;
-	radix_tree_iterate(cache->rtree, k.bytes, k.bytes + sizeof(k.parts.di), &it.it);
+	radix_tree_iterate(cache->rtree, k.bytes, k.bytes + sizeof(k.parts.fd), &it.it);

 	_wait_all(cache);

 	it.success = true;
 	it.it.visit = _invalidate_v;
-	radix_tree_iterate(cache->rtree, k.bytes, k.bytes + sizeof(k.parts.di), &it.it);
-
-	if (it.success)
-		radix_tree_remove_prefix(cache->rtree, k.bytes, k.bytes + sizeof(k.parts.di));
-
+	radix_tree_iterate(cache->rtree, k.bytes, k.bytes + sizeof(k.parts.fd), &it.it);
+	radix_tree_remove_prefix(cache->rtree, k.bytes, k.bytes + sizeof(k.parts.fd));
 	return it.success;
 }

 //----------------------------------------------------------------

-static bool _abort_v(struct radix_tree_iterator *it,
-                     uint8_t *kb, uint8_t *ke, union radix_value v)
+void bcache_set_last_byte(struct bcache *cache, int fd, uint64_t offset, int sector_size)
 {
-	struct block *b = v.ptr;
-
-	if (b->ref_count) {
-		log_fatal("bcache_abort: block (%d, %llu) still held",
-			 b->di, (unsigned long long) b->index);
-		return true;
-	}
-
-	_unlink_block(b);
-	_free_block(b);
-
-	// We can't remove the block from the radix tree yet because
-	// we're in the middle of an iteration.
-	return true;
-}
-
-void bcache_abort_di(struct bcache *cache, int di)
-{
-        union key k;
-	struct radix_tree_iterator it;
-
-	k.parts.di = di;
-
-	it.visit = _abort_v;
-	radix_tree_iterate(cache->rtree, k.bytes, k.bytes + sizeof(k.parts.di), &it);
-	radix_tree_remove_prefix(cache->rtree, k.bytes, k.bytes + sizeof(k.parts.di));
-}
-
-//----------------------------------------------------------------
-
-void bcache_set_last_byte(struct bcache *cache, int di, uint64_t offset, int sector_size)
-{
-	_last_byte_di = di;
+	_last_byte_fd = fd;
 	_last_byte_offset = offset;
 	_last_byte_sector_size = sector_size;
 	if (!sector_size)
 		_last_byte_sector_size = 512;
 }

-void bcache_unset_last_byte(struct bcache *cache, int di)
+void bcache_unset_last_byte(struct bcache *cache, int fd)
 {
-	if (_last_byte_di == di) {
-		_last_byte_di = 0;
+	if (_last_byte_fd == fd) {
+		_last_byte_fd = 0;
 		_last_byte_offset = 0;
 		_last_byte_sector_size = 0;
 	}
 }

-int bcache_set_fd(int fd)
-{
-	int *new_table = NULL;
-	int new_size = 0;
-	int i;
-
- retry:
-	for (i = 0; i < _fd_table_size; i++) {
-		if (_fd_table[i] == -1) {
-			_fd_table[i] = fd;
-			return i;
-		}
-	}
-
-	/* already tried once, shouldn't happen */
-	if (new_size)
-		return -1;
-
-	new_size = _fd_table_size + FD_TABLE_INC;
-
-	new_table = realloc(_fd_table, sizeof(int) * new_size);
-	if (!new_table) {
-		log_error("Cannot extend bcache fd table");
-		return -1;
-	}
-
-	for (i = _fd_table_size; i < new_size; i++)
-		new_table[i] = -1;
-
-	_fd_table = new_table;
-	_fd_table_size = new_size;
-
-	goto retry;
-}
-
-/*
- * Should we check for unflushed or inprogress io on an fd
- * prior to doing clear_fd or change_fd?  (To catch mistakes;
- * the caller should be smart enough to not do that.)
- */
-
-void bcache_clear_fd(int di)
-{
-	if (di >= _fd_table_size)
-		return;
-	_fd_table[di] = -1;
-}
-
-int bcache_change_fd(int di, int fd)
-{
-	if (di >= _fd_table_size)
-		return 0;
-	if (di < 0) {
-		log_error(INTERNAL_ERROR "Cannot change not openned DI with FD:%d", fd);
-		return 0;
-	}
-	_fd_table[di] = fd;
-	return 1;
-}
-
--- a/lib/device/bcache.h
+++ b/lib/device/bcache.h
@@ -16,12 +16,19 @@
 #define BCACHE_H

 #include "device_mapper/all.h"
-#include "base/memory/container_of.h"

 #include <linux/fs.h>
 #include <stdint.h>
 #include <stdbool.h>

+/*----------------------------------------------------------------*/
+
+// FIXME: move somewhere more sensible
+#define container_of(v, t, head) \
+    ((t *)((const char *)(v) - (const char *)&((t *) 0)->head))
+
+/*----------------------------------------------------------------*/
+
 enum dir {
 	DIR_READ,
 	DIR_WRITE
@@ -32,23 +39,23 @@ typedef uint64_t sector_t;

 typedef void io_complete_fn(void *context, int io_error);

-struct io_engine {
-	void (*destroy)(struct io_engine *e);
-	bool (*issue)(struct io_engine *e, enum dir d, int di,
+struct io_engine_ {
+	void (*destroy)(struct io_engine_ *e);
+	bool (*issue)(struct io_engine_ *e, enum dir d, int fd,
 		      sector_t sb, sector_t se, void *data, void *context);
-	bool (*wait)(struct io_engine *e, io_complete_fn fn);
-	unsigned (*max_io)(struct io_engine *e);
+	bool (*wait)(struct io_engine_ *e, io_complete_fn fn);
+	unsigned (*max_io)(struct io_engine_ *e);
 };

-struct io_engine *create_async_io_engine(void);
-struct io_engine *create_sync_io_engine(void);
+struct io_engine_ *create_async_io_engine_(void);
+struct io_engine_ *create_sync_io_engine_(void);

 /*----------------------------------------------------------------*/

 struct bcache;
 struct block {
 	/* clients may only access these three fields */
-	int di;
+	int fd;
 	uint64_t index;
 	void *data;

@@ -65,7 +72,7 @@ struct block {
 * Ownership of engine passes.  Engine will be destroyed even if this fails.
 */
 struct bcache *bcache_create(sector_t block_size, unsigned nr_cache_blocks,
-			     struct io_engine *engine);
+			     struct io_engine_ *engine);
 void bcache_destroy(struct bcache *cache);

 enum bcache_get_flags {
@@ -106,12 +113,12 @@ unsigned bcache_max_prefetches(struct bcache *cache);
 * they complete.  But we're talking a very small difference, and it's worth it
 * to keep callbacks out of this interface.
 */
-void bcache_prefetch(struct bcache *cache, int di, block_address index);
+void bcache_prefetch(struct bcache *cache, int fd, block_address index);

 /*
 * Returns true on success.
 */
-bool bcache_get(struct bcache *cache, int di, block_address index,
+bool bcache_get(struct bcache *cache, int fd, block_address index,
 	        unsigned flags, struct block **result);
 void bcache_put(struct block *b);

@@ -129,42 +136,30 @@ bool bcache_flush(struct bcache *cache);
 * 
 * If the block is currently held false will be returned.
 */
-bool bcache_invalidate(struct bcache *cache, int di, block_address index);
+bool bcache_invalidate(struct bcache *cache, int fd, block_address index);

 /*
 * Invalidates all blocks on the given descriptor.  Call this before closing
 * the descriptor to make sure everything is written back.
 */
-bool bcache_invalidate_di(struct bcache *cache, int di);
+bool bcache_invalidate_fd(struct bcache *cache, int fd);

-/*
- * Call this function if flush, or invalidate fail and you do not
- * wish to retry the writes.  This will throw away any dirty data
- * not written.  If any blocks for di are held, then it will call
- * abort().
- */
-void bcache_abort_di(struct bcache *cache, int di);

 //----------------------------------------------------------------
 // The next four functions are utilities written in terms of the above api.
 
 // Prefetches the blocks neccessary to satisfy a byte range.
-void bcache_prefetch_bytes(struct bcache *cache, int di, uint64_t start, size_t len);
+void bcache_prefetch_bytes(struct bcache *cache, int fd, uint64_t start, size_t len);

 // Reads, writes and zeroes bytes.  Returns false if errors occur.
-bool bcache_read_bytes(struct bcache *cache, int di, uint64_t start, size_t len, void *data);
-bool bcache_write_bytes(struct bcache *cache, int di, uint64_t start, size_t len, void *data);
-bool bcache_zero_bytes(struct bcache *cache, int di, uint64_t start, size_t len);
-bool bcache_set_bytes(struct bcache *cache, int di, uint64_t start, size_t len, uint8_t val);
-bool bcache_invalidate_bytes(struct bcache *cache, int di, uint64_t start, size_t len);
+bool bcache_read_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, void *data);
+bool bcache_write_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, void *data);
+bool bcache_zero_bytes(struct bcache *cache, int fd, uint64_t start, size_t len);
+bool bcache_set_bytes(struct bcache *cache, int fd, uint64_t start, size_t len, uint8_t val);

-void bcache_set_last_byte(struct bcache *cache, int di, uint64_t offset, int sector_size);
-void bcache_unset_last_byte(struct bcache *cache, int di);
+void bcache_set_last_byte(struct bcache *cache, int fd, uint64_t offset, int sector_size);
+void bcache_unset_last_byte(struct bcache *cache, int fd);

 //----------------------------------------------------------------

-int bcache_set_fd(int fd); /* returns di */
-void bcache_clear_fd(int di);
-int bcache_change_fd(int di, int fd);
-
 #endif
--- a/lib/device/dev-cache.c
+++ b/lib/device/dev-cache.c
@@ -35,7 +35,7 @@ struct dev_iter {

 struct dir_list {
 	struct dm_list list;
-	char dir[];
+	char dir[0];
 };

 static struct {
@@ -65,8 +65,6 @@ static int _insert(const char *path, const struct stat *info,
 static void _dev_init(struct device *dev)
 {
 	dev->fd = -1;
-	dev->bcache_fd = -1;
-	dev->bcache_di = -1;
 	dev->read_ahead = -1;

 	dev->ext.enabled = 0;
@@ -359,14 +357,12 @@ static int _get_sysfs_value(const char *path, char *buf, size_t buf_size, int er
 	int r = 0;

 	if (!(fp = fopen(path, "r"))) {
-		if (error_if_no_value)
-			log_sys_error("fopen", path);
+		log_sys_error("fopen", path);
 		return 0;
 	}

 	if (!fgets(buf, buf_size, fp)) {
-		if (error_if_no_value)
-			log_sys_error("fgets", path);
+		log_sys_error("fgets", path);
 		goto out;
 	}

@@ -1091,7 +1087,7 @@ out:
 static void _insert_dirs(struct dm_list *dirs)
 {
 	struct dir_list *dl;
-	struct udev *udev = NULL;
+	struct udev *udev;
 	int with_udev;

 	with_udev = obtain_device_list_from_udev() &&
@@ -1158,13 +1154,13 @@ static int _insert(const char *path, const struct stat *info,
 		}

 		if (rec && !_insert_dir(path))
-			return 0;
+			return_0;
 	} else {		/* add a device */
 		if (!S_ISBLK(info->st_mode))
 			return 1;

 		if (!_insert_dev(path, info->st_rdev))
-			return 0;
+			return_0;
 	}

 	return 1;
@@ -1423,9 +1419,17 @@ const char *dev_name_confirmed(struct device *dev, int quiet)
 	return dev_name(dev);
 }

-struct device *dev_hash_get(const char *name)
+/* Provide a custom reason when a device is ignored */
+const char *dev_cache_filtered_reason(const char *name)
 {
-	return (struct device *) dm_hash_lookup(_cache.names, name);
+	const char *reason = "not found";
+	struct device *d = (struct device *) dm_hash_lookup(_cache.names, name);
+
+	if (d)
+		/* FIXME Record which filter caused the exclusion */
+		reason = "excluded by a filter";
+
+	return reason;
 }

 struct device *dev_cache_get(struct cmd_context *cmd, const char *name, struct dev_filter *f)
@@ -1456,7 +1460,6 @@ struct device *dev_cache_get(struct cmd_context *cmd, const char *name, struct d
 		_insert(name, info_available ? &buf : NULL, 0, obtain_device_list_from_udev());
 		d = (struct device *) dm_hash_lookup(_cache.names, name);
 		if (!d) {
-			log_debug_devs("Device name not found in dev_cache repeat dev_cache_scan for %s", name);
 			dev_cache_scan();
 			d = (struct device *) dm_hash_lookup(_cache.names, name);
 		}
@@ -1519,7 +1522,7 @@ struct device *dev_cache_get_by_devt(struct cmd_context *cmd, dev_t dev, struct
 		sysfs_dir = dm_sysfs_dir();
 		if (sysfs_dir && *sysfs_dir) {
 			/* First check if dev is sysfs to avoid useless scan */
-			if (dm_snprintf(path, sizeof(path), "%sdev/block/%d:%d",
+			if (dm_snprintf(path, sizeof(path), "%s/dev/block/%d:%d",
 					sysfs_dir, (int)MAJOR(dev), (int)MINOR(dev)) < 0) {
 				log_error("dm_snprintf partition failed.");
 				return NULL;
@@ -1532,8 +1535,6 @@ struct device *dev_cache_get_by_devt(struct cmd_context *cmd, dev_t dev, struct
 			}
 		}

-		log_debug_devs("Device num not found in dev_cache repeat dev_cache_scan for %d:%d",
-				(int)MAJOR(dev), (int)MINOR(dev));
 		dev_cache_scan();
 		d = _dev_cache_seek_devt(dev);
 	}
@@ -1649,3 +1650,4 @@ bool dev_cache_has_md_with_end_superblock(struct dev_types *dt)

 	return false;
 }
+
--- a/lib/device/dev-cache.h
+++ b/lib/device/dev-cache.h
@@ -28,7 +28,7 @@ struct cmd_context;
 struct dev_filter {
 	int (*passes_filter) (struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name);
 	void (*destroy) (struct dev_filter *f);
-	void (*wipe) (struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name);
+	void (*wipe) (struct dev_filter *f);
 	void *private;
 	unsigned use_count;
 	const char *name;
@@ -54,11 +54,10 @@ int dev_cache_has_scanned(void);

 int dev_cache_add_dir(const char *path);
 struct device *dev_cache_get(struct cmd_context *cmd, const char *name, struct dev_filter *f);
+const char *dev_cache_filtered_reason(const char *name);

 struct device *dev_cache_get_by_devt(struct cmd_context *cmd, dev_t device, struct dev_filter *f, int *filtered);

-struct device *dev_hash_get(const char *name);
-
 void dev_set_preferred_name(struct dm_str_list *sl, struct device *dev);

 /*
--- a/lib/device/dev-io.c
+++ b/lib/device/dev-io.c
@@ -86,9 +86,6 @@ static int _dev_get_size_dev(struct device *dev, uint64_t *size)
 	int fd = dev->bcache_fd;
 	int do_close = 0;

-	if (dm_list_empty(&dev->aliases))
-		return 0;
-
 	if (dev->size_seqno == _dev_size_seqno) {
 		log_very_verbose("%s: using cached size %" PRIu64 " sectors",
 				 name, dev->size);
@@ -97,7 +94,7 @@ static int _dev_get_size_dev(struct device *dev, uint64_t *size)
 	}

 	if (fd <= 0) {
-		if (!dev_open_readonly_quiet(dev))
+		if (!dev_open_readonly(dev))
 			return_0;
 		fd = dev_fd(dev);
 		do_close = 1;
@@ -106,7 +103,7 @@ static int _dev_get_size_dev(struct device *dev, uint64_t *size)
 	if (ioctl(fd, BLKGETSIZE64, size) < 0) {
 		log_sys_error("ioctl BLKGETSIZE64", name);
 		if (do_close && !dev_close_immediate(dev))
-			stack;
+			log_sys_error("close", name);
 		return 0;
 	}

@@ -117,7 +114,7 @@ static int _dev_get_size_dev(struct device *dev, uint64_t *size)
 	log_very_verbose("%s: size is %" PRIu64 " sectors", name, *size);

 	if (do_close && !dev_close_immediate(dev))
-		stack;
+		log_sys_error("close", name);

 	return 1;
 }
@@ -131,10 +128,8 @@ static int _dev_read_ahead_dev(struct device *dev, uint32_t *read_ahead)
 		return 1;
 	}

-	if (!dev_open_readonly_quiet(dev)) {
-		log_error("Failed to open to get readahead %s", dev_name(dev));
-		return 0;
-	}
+	if (!dev_open_readonly(dev))
+		return_0;

 	if (ioctl(dev->fd, BLKRAGET, &read_ahead_long) < 0) {
 		log_sys_error("ioctl BLKRAGET", dev_name(dev));
@@ -199,7 +194,7 @@ int dev_get_direct_block_sizes(struct device *dev, unsigned int *physical_block_
 	}

 	if (fd <= 0) {
-		if (!dev_open_readonly_quiet(dev))
+		if (!dev_open_readonly(dev))
 			return 0;
 		fd = dev_fd(dev);
 		do_close = 1;
@@ -449,7 +444,7 @@ int dev_open_readonly_quiet(struct device *dev)
 static void _close(struct device *dev)
 {
 	if (close(dev->fd))
-		log_sys_debug("close", dev_name(dev));
+		log_sys_error("close", dev_name(dev));
 	dev->fd = -1;

 	log_debug_devs("Closed %s", dev_name(dev));
--- a/lib/device/dev-md.c
+++ b/lib/device/dev-md.c
@@ -16,7 +16,6 @@
 #include "lib/misc/lib.h"
 #include "lib/device/dev-type.h"
 #include "lib/mm/xlate.h"
-#include "lib/misc/crc.h"
 #ifdef UDEV_SYNC_SUPPORT
 #include <libudev.h> /* for MD detection using udev db records */
 #include "lib/device/dev-ext-udev-constants.h"
@@ -49,89 +48,44 @@ static int _dev_has_md_magic(struct device *dev, uint64_t sb_offset)
 	return 0;
 }

-#define IMSM_SIGNATURE "Intel Raid ISM Cfg Sig. "
-#define IMSM_SIG_LEN (sizeof(IMSM_SIGNATURE) - 1)
+/*
+ * Calculate the position of the superblock.
+ * It is always aligned to a 4K boundary and
+ * depending on minor_version, it can be:
+ * 0: At least 8K, but less than 12K, from end of device
+ * 1: At start of device
+ * 2: 4K from start of device.
+ */
+typedef enum {
+	MD_MINOR_VERSION_MIN,
+	MD_MINOR_V0 = MD_MINOR_VERSION_MIN,
+	MD_MINOR_V1,
+	MD_MINOR_V2,
+	MD_MINOR_VERSION_MAX = MD_MINOR_V2
+} md_minor_version_t;

-static int _dev_has_imsm_magic(struct device *dev, uint64_t devsize_sectors)
+static uint64_t _v1_sb_offset(uint64_t size, md_minor_version_t minor_version)
 {
-	char imsm_signature[IMSM_SIG_LEN];
-	uint64_t off = (devsize_sectors * 512) - 1024;
+	uint64_t sb_offset;

-	if (!dev_read_bytes(dev, off, IMSM_SIG_LEN, imsm_signature))
-		return_0;
-
-	if (!memcmp(imsm_signature, IMSM_SIGNATURE, IMSM_SIG_LEN))
-		return 1;
-
-	return 0;
-}
-
-#define DDF_MAGIC 0xDE11DE11
-struct ddf_header {
-	uint32_t magic;
-	uint32_t crc;
-	char guid[24];
-	char revision[8];
-	char padding[472];
-};
-
-static int _dev_has_ddf_magic(struct device *dev, uint64_t devsize_sectors, uint64_t *sb_offset)
-{
-	struct ddf_header hdr;
-	uint32_t crc, our_crc;
-	uint64_t off;
-	uint64_t devsize_bytes = devsize_sectors * 512;
-
-	if (devsize_bytes < 0x30000)
+	switch(minor_version) {
+	case MD_MINOR_V0:
+		sb_offset = (size - 8 * 2) & ~(4 * 2 - 1ULL);
+		break;
+	case MD_MINOR_V1:
+		sb_offset = 0;
+		break;
+	case MD_MINOR_V2:
+		sb_offset = 4 * 2;
+		break;
+	default:
+		log_warn(INTERNAL_ERROR "WARNING: Unknown minor version %d.",
+			 minor_version);
 		return 0;
-
-	/* 512 bytes before the end of device (from libblkid) */
-	off = ((devsize_bytes / 0x200) - 1) * 0x200;
-
-	if (!dev_read_bytes(dev, off, 512, &hdr))
-		return_0;
-
-	if ((hdr.magic == cpu_to_be32(DDF_MAGIC)) ||
-	    (hdr.magic == cpu_to_le32(DDF_MAGIC))) {
-		crc = hdr.crc;
-		hdr.crc = 0xffffffff;
-		our_crc = calc_crc(0, (const uint8_t *)&hdr, 512);
-
-		if ((cpu_to_be32(our_crc) == crc) ||
-		    (cpu_to_le32(our_crc) == crc)) {
-			*sb_offset = off;
-			return 1;
-		} else {
-			log_debug_devs("Found md ddf magic at %llu wrong crc %x disk %x %s",
-				       (unsigned long long)off, our_crc, crc, dev_name(dev));
-			return 0;
-		}
 	}
+	sb_offset <<= SECTOR_SHIFT;

-	/* 128KB before the end of device (from libblkid) */
-	off = ((devsize_bytes / 0x200) - 257) * 0x200;
-
-	if (!dev_read_bytes(dev, off, 512, &hdr))
-		return_0;
-
-	if ((hdr.magic == cpu_to_be32(DDF_MAGIC)) ||
-	    (hdr.magic == cpu_to_le32(DDF_MAGIC))) {
-		crc = hdr.crc;
-		hdr.crc = 0xffffffff;
-		our_crc = calc_crc(0, (const uint8_t *)&hdr, 512);
-
-		if ((cpu_to_be32(our_crc) == crc) ||
-		    (cpu_to_le32(our_crc) == crc)) {
-			*sb_offset = off;
-			return 1;
-		} else {
-			log_debug_devs("Found md ddf magic at %llu wrong crc %x disk %x %s",
-				       (unsigned long long)off, our_crc, crc, dev_name(dev));
-			return 0;
-		}
-	}
-
-	return 0;
+	return sb_offset;
 }

 /*
@@ -176,7 +130,8 @@ static int _udev_dev_is_md_component(struct device *dev)
 */
 static int _native_dev_is_md_component(struct device *dev, uint64_t *offset_found, int full)
 {
-	uint64_t size, sb_offset = 0;
+	md_minor_version_t minor;
+	uint64_t size, sb_offset;
 	int ret;

 	if (!scan_bcache)
@@ -191,9 +146,9 @@ static int _native_dev_is_md_component(struct device *dev, uint64_t *offset_foun
 		return 0;

 	/*
-	 * Some md versions locate the magic number at the end of the device.
-	 * Those checks can't be satisfied with the initial scan data, and
-	 * require an extra read i/o at the end of every device.  Issuing
+	 * Old md versions locate the magic number at the end of the device.
+	 * Those checks can't be satisfied with the initial bcache data, and
+	 * would require an extra read i/o at the end of every device.  Issuing
 	 * an extra read to every device in every command, just to check for
 	 * the old md format is a bad tradeoff.
 	 *
@@ -204,81 +159,42 @@ static int _native_dev_is_md_component(struct device *dev, uint64_t *offset_foun
 	 * and set it for commands that could possibly write to an md dev
 	 * (pvcreate/vgcreate/vgextend).
 	 */
-
-	/*
-	 * md superblock version 1.1 at offset 0 from start
-	 */
-
-	if (_dev_has_md_magic(dev, 0)) {
-		log_debug_devs("Found md magic number at offset 0 of %s.", dev_name(dev));
-		ret = 1;
-		goto out;
-	}
-
-	/*
-	 * md superblock version 1.2 at offset 4KB from start
-	 */
-
-	if (_dev_has_md_magic(dev, 4096)) {
-		log_debug_devs("Found md magic number at offset 4096 of %s.", dev_name(dev));
-		ret = 1;
-		goto out;
-	}
-
 	if (!full) {
+		sb_offset = 0;
+		if (_dev_has_md_magic(dev, sb_offset)) {
+			log_debug_devs("Found md magic number at offset 0 of %s.", dev_name(dev));
+			ret = 1;
+			goto out;
+		}
+
+		sb_offset = 8 << SECTOR_SHIFT;
+		if (_dev_has_md_magic(dev, sb_offset)) {
+			log_debug_devs("Found md magic number at offset %d of %s.", (int)sb_offset, dev_name(dev));
+			ret = 1;
+			goto out;
+		}
+
 		ret = 0;
 		goto out;
 	}

-	/*
-	 * Handle superblocks at the end of the device.
-	 */
-
-	/*
-	 * md superblock version 0 at 64KB from end of device
-	 * (after end is aligned to 64KB)
-	 */
-
+	/* Check if it is an md component device. */
+	/* Version 0.90.0 */
 	sb_offset = MD_NEW_SIZE_SECTORS(size) << SECTOR_SHIFT;
-
 	if (_dev_has_md_magic(dev, sb_offset)) {
-		log_debug_devs("Found md magic number at offset %llu of %s.", (unsigned long long)sb_offset, dev_name(dev));
 		ret = 1;
 		goto out;
 	}

-	/*
-	 * md superblock version 1.0 at 8KB from end of device
-	 */
-
-	sb_offset = ((size - 8 * 2) & ~(4 * 2 - 1ULL)) << SECTOR_SHIFT;
-
-	if (_dev_has_md_magic(dev, sb_offset)) {
-		log_debug_devs("Found md magic number at offset %llu of %s.", (unsigned long long)sb_offset, dev_name(dev));
-		ret = 1;
-		goto out;
-	}
-
-	/*
-	 * md imsm superblock 1K from end of device
-	 */
-
-	if (_dev_has_imsm_magic(dev, size)) {
-		log_debug_devs("Found md imsm magic number at offset %llu of %s.", (unsigned long long)sb_offset, dev_name(dev));
-		sb_offset = 1024;
-		ret = 1;
-		goto out;
-	}
-
-	/*
-	 * md ddf superblock 512 bytes from end, or 128KB from end
-	 */
-
-	if (_dev_has_ddf_magic(dev, size, &sb_offset)) {
-		log_debug_devs("Found md ddf magic number at offset %llu of %s.", (unsigned long long)sb_offset, dev_name(dev));
-		ret = 1;
-		goto out;
-	}
+	minor = MD_MINOR_VERSION_MIN;
+	/* Version 1, try v1.0 -> v1.2 */
+	do {
+		sb_offset = _v1_sb_offset(size, minor);
+		if (_dev_has_md_magic(dev, sb_offset)) {
+			ret = 1;
+			goto out;
+		}
+	} while (++minor <= MD_MINOR_VERSION_MAX);

 	ret = 0;
 out:
--- a/lib/device/dev-type.c
+++ b/lib/device/dev-type.c
@@ -42,6 +42,7 @@ int dev_is_pmem(struct device *dev)
 {
 	FILE *fp;
 	char path[PATH_MAX];
+	char buffer[64];
 	int is_pmem = 0;

 	if (dm_snprintf(path, sizeof(path), "%sdev/block/%d:%d/queue/dax",
@@ -55,16 +56,27 @@ int dev_is_pmem(struct device *dev)
 	if (!(fp = fopen(path, "r")))
 		return 0;

-	if (fscanf(fp, "%d", &is_pmem) != 1)
-		log_warn("Failed to parse DAX %s.", path);
-
-	if (is_pmem)
-		log_debug("%s is pmem", dev_name(dev));
+	if (!fgets(buffer, sizeof(buffer), fp)) {
+		log_warn("Failed to read %s.", path);
+		if (fclose(fp))
+			log_sys_debug("fclose", path);
+		return 0;
+	} else if (sscanf(buffer, "%d", &is_pmem) != 1) {
+		log_warn("Failed to parse %s '%s'.", path, buffer);
+		if (fclose(fp))
+			log_sys_debug("fclose", path);
+		return 0;
+	}

 	if (fclose(fp))
 		log_sys_debug("fclose", path);

-	return is_pmem ? 1 : 0;
+	if (is_pmem) {
+		log_debug("%s is pmem", dev_name(dev));
+		return 1;
+	}
+
+	return 0;
 }

 int dev_is_lv(struct device *dev)
@@ -72,7 +84,6 @@ int dev_is_lv(struct device *dev)
 	FILE *fp;
 	char path[PATH_MAX];
 	char buffer[64];
-	int ret = 0;

 	if (dm_snprintf(path, sizeof(path), "%sdev/block/%d:%d/dm/uuid",
 			dm_sysfs_dir(),
@@ -85,15 +96,17 @@ int dev_is_lv(struct device *dev)
 	if (!(fp = fopen(path, "r")))
 		return 0;

-	if (!fgets(buffer, sizeof(buffer), fp))
-		log_debug("Failed to read %s.", path);
-	else if (!strncmp(buffer, "LVM-", 4))
-		ret = 1;
+	if (!fgets(buffer, sizeof(buffer), fp)) {
+		log_warn("Failed to read %s.", path);
+		fclose(fp);
+		return 0;
+	}

-	if (fclose(fp))
-		log_sys_debug("fclose", path);
+	fclose(fp);

-	return ret;
+	if (!strncmp(buffer, "LVM-", 4))
+		return 1;
+	return 0;
 }

 struct dev_types *create_dev_types(const char *proc_dir,
@@ -646,31 +659,6 @@ out:
 	return ret;
 }

-#ifdef BLKID_WIPING_SUPPORT
-int get_fs_block_size(struct device *dev, uint32_t *fs_block_size)
-{
-	char *block_size_str = NULL;
-
-	if ((block_size_str = blkid_get_tag_value(NULL, "BLOCK_SIZE", dev_name(dev)))) {
-		*fs_block_size = (uint32_t)atoi(block_size_str);
-		free(block_size_str);
-		log_debug("Found blkid BLOCK_SIZE %u for fs on %s", *fs_block_size, dev_name(dev));
-		return 1;
-	} else {
-		log_debug("No blkid BLOCK_SIZE for fs on %s", dev_name(dev));
-		*fs_block_size = 0;
-		return 0;
-	}
-}
-#else
-int get_fs_block_size(struct device *dev, uint32_t *fs_block_size)
-{
-	log_debug("Disabled blkid BLOCK_SIZE for fs.");
-	*fs_block_size = 0;
-	return 0;
-}
-#endif
-
 #ifdef BLKID_WIPING_SUPPORT

 static inline int _type_in_flag_list(const char *type, uint32_t flag_list)
--- a/lib/device/dev-type.h
+++ b/lib/device/dev-type.h
@@ -97,6 +97,4 @@ int dev_is_pmem(struct device *dev);

 int dev_is_lv(struct device *dev);

-int get_fs_block_size(struct device *dev, uint32_t *fs_block_size);
-
 #endif
--- a/lib/device/device.h
+++ b/lib/device/device.h
@@ -71,9 +71,7 @@ struct device {
 	int logical_block_size;  /* From BLKSSZGET: lowest possible block size that the storage device can address */
 	int read_ahead;
 	int bcache_fd;
-	int bcache_di;
 	uint32_t flags;
-	uint32_t filtered_flags;
 	unsigned size_seqno;
 	uint64_t size;
 	uint64_t end;
--- a/lib/device/io-manager-utils.c
+++ b/lib/device/io-manager-utils.c
@@ -0,0 +1,290 @@
+/*
+ * Copyright (C) 2018 Red Hat, Inc. All rights reserved.
+ *
+ * This file is part of LVM2.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU Lesser General Public License v.2.1.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "lib/device/io-manager.h"
+
+// FIXME: need to define this in a common place (that doesn't pull in deps)
+#ifndef SECTOR_SHIFT
+#define SECTOR_SHIFT 9
+#endif
+
+//----------------------------------------------------------------
+
+static void byte_range_to_block_range(struct io_manager *iom, uint64_t start, size_t len,
+				      block_address *bb, block_address *be)
+{
+	block_address block_size = io_block_sectors(iom) << SECTOR_SHIFT;
+	*bb = start / block_size;
+	*be = (start + len + block_size - 1) / block_size;
+}
+
+static uint64_t _min(uint64_t lhs, uint64_t rhs)
+{
+	if (rhs < lhs)
+		return rhs;
+
+	return lhs;
+}
+
+//----------------------------------------------------------------
+
+void io_prefetch_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len)
+{
+	block_address bb, be;
+
+	byte_range_to_block_range(iom, start, len, &bb, &be);
+	while (bb < be) {
+		io_prefetch_block(iom, dev, bb);
+		bb++;
+	}
+}
+
+//----------------------------------------------------------------
+
+bool io_read_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len, void *data)
+{
+	struct block *b;
+	block_address bb, be;
+	uint64_t block_size = io_block_sectors(iom) << SECTOR_SHIFT;
+	uint64_t block_offset = start % block_size;
+
+	io_prefetch_bytes(iom, dev, start, len);
+
+	byte_range_to_block_range(iom, start, len, &bb, &be);
+
+	for (; bb != be; bb++) {
+        	if (!io_get_block(iom, dev, bb, 0, &b))
+			return false;
+
+		size_t blen = _min(block_size - block_offset, len);
+		memcpy(data, ((unsigned char *) b->data) + block_offset, blen);
+		io_put_block(b);
+
+		block_offset = 0;
+		len -= blen;
+		data = ((unsigned char *) data) + blen;
+	}
+
+	return true;
+}
+
+//----------------------------------------------------------------
+
+// Writing bytes and zeroing bytes are very similar, so we factor out
+// this common code.
+ 
+struct updater;
+
+typedef bool (*partial_update_fn)(struct updater *u, struct io_dev *dev, block_address bb, uint64_t offset, size_t len);
+typedef bool (*whole_update_fn)(struct updater *u, struct io_dev *dev, block_address bb, block_address be);
+
+struct updater {
+	struct io_manager *iom;
+	partial_update_fn partial_fn;
+	whole_update_fn whole_fn;
+	void *data;
+};
+
+static bool _update_bytes(struct updater *u, struct io_dev *dev, uint64_t start, size_t len)
+{
+        struct io_manager *iom = u->iom;
+	block_address bb, be;
+	uint64_t block_size = io_block_sectors(iom) << SECTOR_SHIFT;
+	uint64_t block_offset = start % block_size;
+	uint64_t nr_whole;
+
+	byte_range_to_block_range(iom, start, len, &bb, &be);
+
+	// If the last block is partial, we will require a read, so let's 
+	// prefetch it.
+	if ((start + len) % block_size)
+        	io_prefetch_block(iom, dev, (start + len) / block_size);
+
+	// First block may be partial
+	if (block_offset) {
+        	size_t blen = _min(block_size - block_offset, len);
+		if (!u->partial_fn(u, dev, bb, block_offset, blen))
+        		return false;
+
+		len -= blen;
+        	if (!len)
+                	return true;
+
+                bb++;
+	}
+
+        // Now we write out a set of whole blocks
+        nr_whole = len / block_size;
+        if (!u->whole_fn(u, dev, bb, bb + nr_whole))
+                return false;
+
+	bb += nr_whole;
+	len -= nr_whole * block_size;
+
+	if (!len)
+        	return true;
+
+        // Finally we write a partial end block
+        return u->partial_fn(u, dev, bb, 0, len);
+}
+
+// Return a mask with a bit set for each sector touched by the region.
+// To be used with io_get_block_mask().
+static uint64_t _region_to_mask(uint64_t offset, size_t len)
+{
+	unsigned i;
+	uint64_t r = 0;
+	unsigned sb = offset >> SECTOR_SHIFT;
+	unsigned se = (offset + len + ((1 << SECTOR_SHIFT) - 1)) >> SECTOR_SHIFT;
+
+	for (i = sb; i < se; i++)
+		r |=  1ull << i;
+
+	return r;
+}
+
+//----------------------------------------------------------------
+
+static bool _write_partial(struct updater *u, struct io_dev *dev, block_address bb,
+                           uint64_t offset, size_t len)
+{
+	struct block *b;
+
+	if (!io_get_block_mask(u->iom, dev, bb, GF_DIRTY,
+                               _region_to_mask(offset, len), &b))
+		return false;
+
+	memcpy(((unsigned char *) b->data) + offset, u->data, len);
+	u->data = ((unsigned char *) u->data) + len;
+
+	io_put_block(b);
+	return true;
+}
+
+static bool _write_whole(struct updater *u, struct io_dev *dev, block_address bb, block_address be)
+{
+	struct block *b;
+	uint64_t block_size = io_block_sectors(u->iom) << SECTOR_SHIFT;
+
+	for (; bb != be; bb++) {
+        	// We don't need to read the block since we are overwriting
+        	// it completely.
+		if (!io_get_block(u->iom, dev, bb, GF_ZERO, &b))
+        		return false;
+		memcpy(b->data, u->data, block_size);
+		u->data = ((unsigned char *) u->data) + block_size;
+        	io_put_block(b);
+	}
+
+	return true;
+}
+
+bool io_write_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len, void *data)
+{
+        struct updater u;
+
+        u.iom = iom;
+        u.partial_fn = _write_partial;
+        u.whole_fn = _write_whole;
+        u.data = data;
+
+	return _update_bytes(&u, dev, start, len);
+}
+
+//----------------------------------------------------------------
+
+static bool _zero_partial(struct updater *u, struct io_dev *dev, block_address bb, uint64_t offset, size_t len)
+{
+	struct block *b;
+
+	if (!io_get_block_mask(u->iom, dev, bb, GF_DIRTY,
+                               _region_to_mask(offset, len), &b))
+		return false;
+
+	memset(((unsigned char *) b->data) + offset, 0, len);
+	io_put_block(b);
+
+	return true;
+}
+
+static bool _zero_whole(struct updater *u, struct io_dev *dev, block_address bb, block_address be)
+{
+	struct block *b;
+
+	for (; bb != be; bb++) {
+		if (!io_get_block(u->iom, dev, bb, GF_ZERO, &b))
+        		return false;
+        	io_put_block(b);
+	}
+
+	return true;
+}
+
+bool io_zero_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len)
+{
+        struct updater u;
+
+        u.iom = iom;
+        u.partial_fn = _zero_partial;
+        u.whole_fn = _zero_whole;
+        u.data = NULL;
+
+	return _update_bytes(&u, dev, start, len);
+}
+
+//----------------------------------------------------------------
+
+static bool _set_partial(struct updater *u, struct io_dev *dev, block_address bb, uint64_t offset, size_t len)
+{
+	struct block *b;
+	uint8_t val = *((uint8_t *) u->data);
+
+	if (!io_get_block_mask(u->iom, dev, bb, GF_DIRTY,
+                               _region_to_mask(offset, len), &b))
+		return false;
+
+	memset(((unsigned char *) b->data) + offset, val, len);
+	io_put_block(b);
+
+	return true;
+}
+
+static bool _set_whole(struct updater *u, struct io_dev *dev, block_address bb, block_address be)
+{
+	struct block *b;
+	uint8_t val = *((uint8_t *) u->data);
+        uint64_t len = io_block_sectors(u->iom) * 512;
+
+	for (; bb != be; bb++) {
+		if (!io_get_block(u->iom, dev, bb, GF_ZERO, &b))
+        		return false;
+        	memset((unsigned char *) b->data, val, len);
+        	io_put_block(b);
+	}
+
+	return true;
+}
+
+bool io_set_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len, uint8_t val)
+{
+        struct updater u;
+
+        u.iom = iom;
+        u.partial_fn = _set_partial;
+        u.whole_fn = _set_whole;
+        u.data = &val;
+
+	return _update_bytes(&u, dev, start, len);
+}
+
--- a/lib/device/io-manager.c
+++ b/lib/device/io-manager.c
--- a/lib/device/io-manager.h
+++ b/lib/device/io-manager.h
@@ -0,0 +1,226 @@
+/*
+ * Copyright (C) 2018 Red Hat, Inc. All rights reserved.
+ *
+ * This file is part of LVM2.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU Lesser General Public License v.2.1.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef IO_MANAGER_H
+#define IO_MANAGER_H
+
+#include "device_mapper/all.h"
+
+#include <linux/fs.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+/*----------------------------------------------------------------*/
+
+// FIXME: move somewhere more sensible
+#define container_of(v, t, head) \
+    ((t *)((const char *)(v) - (const char *)&((t *) 0)->head))
+
+/*----------------------------------------------------------------*/
+
+enum dir {
+	DIR_READ = 1,
+	DIR_WRITE = 2
+};
+
+typedef uint64_t block_address;
+typedef uint64_t sector_t;
+
+typedef void io_complete_fn(void *context, int io_error);
+
+enum {
+        EF_READ_ONLY = 1,
+        EF_EXCL = 2
+};
+
+// The io engine must support io with any sector alignment.
+// For instance aio will need to fall back to sync io if the
+// io is not page aligned.
+struct io_engine {
+	void (*destroy)(struct io_engine *e);
+
+	int (*open)(struct io_engine *e, const char *path, unsigned flags, bool o_direct);
+	void (*close)(struct io_engine *e, int fd);
+
+	unsigned (*max_io)(struct io_engine *e);
+	bool (*issue)(struct io_engine *e, enum dir d, int fd,
+		      sector_t sb, sector_t se, void *data, void *context);
+	bool (*wait)(struct io_engine *e, io_complete_fn fn);
+
+	// The path is there purely for logging.
+	bool (*get_size)(struct io_engine *e, const char *path, int fd, sector_t *size);
+	bool (*get_block_sizes)(struct io_engine *e, const char *path, int fd,
+                                unsigned *physical_block_size, unsigned *logical_block_size);
+};
+
+struct io_engine *create_async_io_engine(void);
+struct io_engine *create_sync_io_engine(void);
+
+// Same as create_async_io_engine(), except writes are not acted upon.
+// Used when running with --test.
+struct io_engine *create_test_io_engine(void);
+
+/*----------------------------------------------------------------*/
+
+struct io_manager;
+struct io_dev;
+struct io_dev_internal;
+
+struct block {
+	/* clients may only access these two fields */
+	uint64_t index;
+	void *data;
+
+	struct io_manager *iom;
+	struct io_dev_internal *dev;
+	struct dm_list list;
+
+	unsigned flags;
+	unsigned ref_count;
+	int error;
+	enum dir io_dir;
+	unsigned io_count;
+
+        // Bits mark which sectors of the block should be written.
+        uint64_t dirty_bits;
+};
+
+/*
+ * Ownership of engine passes.  Engine will be destroyed even if this fails.
+ * 
+ * 'max_cache_devs' limits the number of devices that are held open because we
+ * are caching data from them.  If to many devices are used the least recently used
+ * dev will be closed, and all its data invalidated.
+ */
+struct io_manager *io_manager_create(sector_t block_size, unsigned nr_cache_blocks,
+			     	     unsigned max_cache_devs, struct io_engine *engine,
+                                     bool use_o_direct);
+void io_manager_destroy(struct io_manager *iom);
+
+// IMPORTANT: It is up to the caller to normalise the device path.  io does
+// not detect if two relative path refer to the same file, or if 2 device nodes
+// refer to the same underlying dev.
+
+// There may be more than one holder of a device at a time.  But since we cannot
+// promote a dev from being opened non-exclusive to exclusive, there are some
+// restrictions:
+//
+// - You may have concurrent non-exclusive holders.
+// - You may have concurrent exclusive holders.
+// - You may not have mixed holders.
+// - If blocks are in the cache that were acquired by a non exclusive holder,
+//   they will all be invalidated if a device is opened exclusively. 
+struct io_dev *io_get_dev(struct io_manager *iom, const char *path, unsigned flags);
+void io_put_dev(struct io_dev *dev);
+
+enum io_get_flags {
+	/*
+	 * The block will be zeroed before get_block returns it.  This
+	 * potentially avoids a read if the block is not already in the cache.
+	 * GF_DIRTY is implicit.
+	 */
+	GF_ZERO = (1 << 0),
+
+	/*
+	 * Indicates the caller is intending to change the data in the block, a
+	 * writeback will occur after the block is released.
+	 */
+	GF_DIRTY = (1 << 1)
+};
+
+sector_t io_block_sectors(struct io_manager *iom);
+unsigned io_nr_cache_blocks(struct io_manager *iom);
+unsigned io_max_prefetches(struct io_manager *iom);
+unsigned io_max_cache_devs(struct io_manager *iom);
+
+/*
+ * Use the prefetch method to take advantage of asynchronous IO.  For example,
+ * if you wanted to read a block from many devices concurrently you'd do
+ * something like this:
+ *
+ * dm_list_iterate_items (dev, &devices)
+ * 	io_prefetch_block(cache, dev, block);
+ *
+ * dm_list_iterate_items (dev, &devices) {
+ *	if (!io_get_block(cache, dev, block, &b))
+ *		fail();
+ *
+ *	process_block(b);
+ * }
+ *
+ * It's slightly sub optimal, since you may not run the gets in the order that
+ * they complete.  But we're talking a very small difference, and it's worth it
+ * to keep callbacks out of this interface.
+ */
+void io_prefetch_block(struct io_manager *iom, struct io_dev *dev, block_address index);
+
+/*
+ * Returns true on success.
+ */
+bool io_get_block(struct io_manager *iom, struct io_dev *dev, block_address index,
+	          unsigned flags, struct block **result);
+
+// The mask is used to specify which sectors should be written.
+// 'mask' is ignored unless the get flags are GF_ZERO or GF_DIRTY.
+bool io_get_block_mask(struct io_manager *iom, struct io_dev *dev, block_address index,
+	               unsigned flags, uint64_t mask, struct block **result);
+
+void io_put_block(struct block *b);
+
+/*
+ * flush() does not attempt to writeback locked blocks.  flush will fail
+ * (return false), if any unlocked dirty data cannot be written back.
+ */
+bool io_flush(struct io_manager *iom);
+bool io_flush_dev(struct io_manager *iom, struct io_dev *dev);
+
+/*
+ * Remove blocks from the cache.
+ * 
+ * If the block is dirty it will be written back first.  If the writeback fails
+ * false will be returned.
+ * 
+ * If any of the blocks are currently held, false will be returned.
+ */
+bool io_invalidate_block(struct io_manager *iom, struct io_dev *dev, block_address index);
+bool io_invalidate_dev(struct io_manager *iom, struct io_dev *dev);
+bool io_invalidate_all(struct io_manager *iom);
+
+bool io_dev_size(struct io_dev *dev, uint64_t *sectors);
+bool io_dev_block_sizes(struct io_dev *dev, unsigned *physical_block_size, unsigned *logical_block_size);
+
+// For testing and debug only
+void *io_get_dev_context(struct io_dev *dev);
+int io_get_fd(void *dev_context);
+bool io_is_well_formed(struct io_manager *iom);
+
+//----------------------------------------------------------------
+
+// The next four functions are utilities written in terms of the above
+// api.  This is simpler to use than the block based api, and I would
+// expect almost all clients to use this interface in spite of the extra
+// memory copying involved.
+ 
+// Prefetches the blocks neccessary to satisfy a byte range.
+void io_prefetch_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len);
+
+// Reads, writes and zeroes bytes.  Returns false if errors occur.
+bool io_read_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len, void *data);
+bool io_write_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len, void *data);
+bool io_zero_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len);
+bool io_set_bytes(struct io_manager *iom, struct io_dev *dev, uint64_t start, size_t len, uint8_t val);
+
+//----------------------------------------------------------------
+
+#endif
--- a/lib/device/io-processor.c
+++ b/lib/device/io-processor.c
@@ -0,0 +1,279 @@
+/*
+ * Copyright (C) 2018 Red Hat, Inc. All rights reserved.
+ *
+ * This file is part of LVM2.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v.2.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "lib/device/io-processor.h"
+
+#include "base/data-struct/list.h"
+#include "base/memory/zalloc.h"
+#include "lib/log/lvm-logging.h"
+#include "lib/log/log.h"
+
+//----------------------------------------------------------------
+
+struct job {
+	struct dm_list list;
+
+	char *path;
+	uint64_t start;
+	uint64_t len;
+	void *context;
+};
+
+struct io_processor {
+	struct processor_ops *ops;
+	io_task_fn task;
+	io_error_fn err;
+	struct dm_list jobs;
+
+	size_t buffer_size;
+	void *buffer;
+};
+
+static void _free_job(struct job *j)
+{
+	free(j->path);
+	free(j);
+}
+
+struct io_processor *io_processor_create_internal(struct processor_ops *ops,
+                                                  io_task_fn t, io_error_fn err)
+{
+	struct io_processor *iop = zalloc(sizeof(*iop));
+
+	if (iop) {
+		iop->ops= ops;
+		iop->task = t;
+		iop->err = err;
+		dm_list_init(&iop->jobs);
+	}
+
+	return iop;
+}
+
+void io_processor_destroy(struct io_processor *iop)
+{
+	struct job *j, *tmp;
+
+	iop->ops->destroy(iop->ops);
+
+	dm_list_iterate_items_safe(j, tmp, &iop->jobs)
+		_free_job(j);
+
+	free(iop->buffer);
+	free(iop);
+}
+
+static bool _ensure_buffer(struct io_processor *iop, uint64_t sectors)
+{
+	uint64_t size = sectors * 512;
+	void *buffer;
+
+	// is the existing buffer big enough?
+	if (size <= iop->buffer_size)
+		return true;
+
+	if (posix_memalign(&buffer, 8, size)) {
+		log_error("unable to allocate job buffer");
+		return false;
+	}
+
+	if (iop->buffer)
+		free(iop->buffer);
+
+	iop->buffer = buffer;
+	iop->buffer_size = size;
+
+	return true;
+}
+
+bool io_processor_add(struct io_processor *iop, const char *path,
+                      uint64_t start, uint64_t len,
+                      void *context)
+{
+	struct job *j = zalloc(sizeof(*j));
+
+	if (!j)
+		return false;
+
+	j->path = strdup(path);
+	if (!j->path) {
+		free(j);
+		return false;
+	}
+
+	j->start = start;
+	j->len = len;
+	j->context = context;
+
+	if (!_ensure_buffer(iop, len)) {
+		free(j->path);
+		free(j);
+		return false;
+	}
+
+	dm_list_add(&iop->jobs, &j->list);
+	return true;
+}
+
+static void _fail_job(struct io_processor *iop, struct job *j)
+{
+	iop->err(j->context);
+	dm_list_del(&j->list);
+	_free_job(j);
+}
+
+static uint64_t min(uint64_t lhs, uint64_t rhs)
+{
+	if (lhs < rhs)
+		return lhs;
+
+	if (rhs < lhs)
+		return rhs;
+
+	return lhs;
+}
+
+static void _batch(struct io_processor *iop, unsigned count)
+{
+	unsigned blocks_covered;
+	struct job *j, *tmp;
+	struct dm_list batch;
+	void *dev;
+
+	dm_list_init(&batch);
+
+	// prefetch
+	dm_list_iterate_items_safe(j, tmp, &iop->jobs) {
+		if (!count)
+			break;
+
+		dev = iop->ops->get_dev(iop->ops, j->path, EF_READ_ONLY);
+		if (!dev) {
+			_fail_job(iop, j);
+			continue;
+		}
+
+		blocks_covered = iop->ops->prefetch_bytes(iop->ops, dev, j->start, j->len);
+		iop->ops->put_dev(iop->ops, dev);
+
+		count -= min(count, blocks_covered);
+		dm_list_move(&batch, &j->list);
+	}
+
+	// read
+	dm_list_iterate_items_safe(j, tmp, &batch) {
+		dev = iop->ops->get_dev(iop->ops, j->path, EF_READ_ONLY);
+		if (!dev) {
+			_fail_job(iop, j);
+			continue;
+		}
+
+		if (!iop->ops->read_bytes(iop->ops, dev, j->start, j->len, iop->buffer)) {
+			iop->ops->put_dev(iop->ops, dev);
+			_fail_job(iop, j);
+			continue;
+		}
+
+		iop->ops->put_dev(iop->ops, dev);
+
+		iop->task(j->context, iop->buffer, j->len);
+		dm_list_del(&j->list);
+		_free_job(j);
+	}
+}
+
+void io_processor_exec(struct io_processor *iop)
+{
+	unsigned batch_size = iop->ops->batch_size(iop->ops);
+
+	while (!dm_list_empty(&iop->jobs))
+		_batch(iop, batch_size);
+}
+
+//----------------------------------------------------------------
+
+struct iom_ops {
+	struct processor_ops ops;
+	struct io_manager *iom;
+};
+
+// How many blocks does a byte range cover?
+static unsigned _blocks_covered(struct io_manager *iom, uint64_t start, uint64_t len)
+{
+	uint64_t bs = io_block_sectors(iom) * 512;
+	uint64_t b = start / bs;
+	uint64_t e = (start + len + bs - 1) / bs;
+
+	return e - b;
+}
+
+static void _iom_destroy(struct processor_ops *ops)
+{
+	struct iom_ops *p = container_of(ops, struct iom_ops, ops);
+	free(p);
+}
+
+static unsigned _iom_batch_size(struct processor_ops *ops)
+{
+	struct io_manager *iom = container_of(ops, struct iom_ops, ops)->iom;
+	return io_max_prefetches(iom);
+}
+
+static void *_iom_get_dev(struct processor_ops *ops, const char *path, unsigned flags)
+{
+	struct io_manager *iom = container_of(ops, struct iom_ops, ops)->iom;
+	return io_get_dev(iom, path, flags);
+}
+
+static void _iom_put_dev(struct processor_ops *ops, void *dev)
+{
+	return io_put_dev(dev);
+}
+
+static unsigned _iom_prefetch_bytes(struct processor_ops *ops, void *dev, uint64_t start, size_t len)
+{
+	struct io_manager *iom = container_of(ops, struct iom_ops, ops)->iom;
+	io_prefetch_bytes(iom, dev, start, len);
+
+	return _blocks_covered(iom, start, len);
+}
+
+static bool _iom_read_bytes(struct processor_ops *ops, void *dev, uint64_t start, size_t len, void *data)
+{
+	struct io_manager *iom = container_of(ops, struct iom_ops, ops)->iom;
+	return io_read_bytes(iom, dev, start, len, data);
+}
+
+struct io_processor *io_processor_create(struct io_manager *iom,
+                                         io_task_fn t, io_error_fn err)
+{
+	struct io_processor *iop;
+	struct iom_ops *p = zalloc(sizeof(*p));
+
+	p->ops.destroy = _iom_destroy;
+	p->ops.batch_size = _iom_batch_size;
+	p->ops.get_dev = _iom_get_dev;
+	p->ops.put_dev = _iom_put_dev;
+	p->ops.prefetch_bytes = _iom_prefetch_bytes;
+	p->ops.read_bytes = _iom_read_bytes;
+	p->iom = iom;
+
+	iop = io_processor_create_internal(&p->ops, t, err);
+	if (!iop)
+		free(p);
+
+	return iop;
+}
+
+//----------------------------------------------------------------
--- a/lib/device/io-processor.h
+++ b/lib/device/io-processor.h
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2018 Red Hat, Inc. All rights reserved.
+ *
+ * This file is part of LVM2.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License v.2.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef LIB_DEVICE_IO_PARALLEL_H
+#define LIB_DEVICE_IO_PARALLEL_H
+
+#include "lib/device/io-manager.h"
+
+//----------------------------------------------------------------
+
+// io-manager utility that let you run a common task on many
+// io-manager blocks in parallel.  This doesn't use multiple threads
+// but it does take care to prefetch data in parallel, so you will
+// get a big speed up over a simple get/process/put loop.
+
+struct io_processor;
+typedef void (*io_task_fn)(void *context, void *data, uint64_t len);
+typedef void (*io_error_fn)(void *context);
+
+
+struct io_processor *io_processor_create(struct io_manager *iom,
+                                         io_task_fn t, io_error_fn err);
+void io_processor_destroy(struct io_processor *iop);
+
+// path is copied. start and len are in bytes.
+bool io_processor_add(struct io_processor *iop, const char *path, uint64_t start,
+                      uint64_t len, void *context);
+void io_processor_exec(struct io_processor *iop);
+
+
+//----------------------------------------------------------------
+// For unit testing
+ 
+struct processor_ops {
+	void (*destroy)(struct processor_ops *ops);
+	unsigned (*batch_size)(struct processor_ops *ops);
+	void *(*get_dev)(struct processor_ops *ops, const char *path, unsigned flags);
+	void (*put_dev)(struct processor_ops *ops, void *dev);
+	// returns the number of blocks covered
+	unsigned (*prefetch_bytes)(struct processor_ops *ops, void *dev, uint64_t start, size_t len);
+	bool (*read_bytes)(struct processor_ops *ops, void *dev, uint64_t start, size_t len, void *data);
+};
+
+struct io_processor *io_processor_create_internal(struct processor_ops *ops,
+                                                  io_task_fn t, io_error_fn err);
+
+//----------------------------------------------------------------
+
+#endif
--- a/lib/display/display.c
+++ b/lib/display/display.c
@@ -406,12 +406,10 @@ int lvdisplay_full(struct cmd_context *cmd,
 	struct lv_segment *seg = NULL;
 	int lvm1compat;
 	dm_percent_t snap_percent;
-	int thin_pool_active = 0;
-	dm_percent_t thin_data_percent = 0, thin_metadata_percent = 0;
+	int thin_data_active = 0, thin_metadata_active = 0;
+	dm_percent_t thin_data_percent, thin_metadata_percent;
 	int thin_active = 0;
-	dm_percent_t thin_percent = 0;
-	struct lv_status_thin *thin_status = NULL;
-	struct lv_status_thin_pool *thin_pool_status = NULL;
+	dm_percent_t thin_percent;
 	struct lv_status_cache *cache_status = NULL;
 	struct lv_status_vdo *vdo_status = NULL;

@@ -505,18 +503,15 @@ int lvdisplay_full(struct cmd_context *cmd,
 		if (seg->merge_lv)
 			log_print("LV merging to          %s",
 				  seg->merge_lv->name);
-		if (inkernel && (thin_active = lv_thin_status(lv, 0, &thin_status))) {
-			thin_percent = thin_status->usage;
-			dm_pool_destroy(thin_status->mem);
-		}
+		if (inkernel)
+			thin_active = lv_thin_percent(lv, 0, &thin_percent);
 		if (lv_is_merging_origin(lv))
 			log_print("LV merged with         %s",
 				  find_snapshot(lv)->lv->name);
 	} else if (lv_is_thin_pool(lv)) {
-		if ((thin_pool_active = lv_thin_pool_status(lv, 0, &thin_pool_status))) {
-			thin_data_percent = thin_pool_status->data_usage;
-			thin_metadata_percent = thin_pool_status->metadata_usage;
-			dm_pool_destroy(thin_pool_status->mem);
+		if (lv_info(cmd, lv, 1, &info, 1, 1) && info.exists) {
+			thin_data_active = lv_thin_pool_percent(lv, 0, &thin_data_percent);
+			thin_metadata_active = lv_thin_pool_percent(lv, 1, &thin_metadata_percent);
 		}
 		/* FIXME: display thin_pool targets transid for activated LV as well */
 		seg = first_seg(lv);
@@ -527,10 +522,10 @@ int lvdisplay_full(struct cmd_context *cmd,
 			log_print("LV origin of Cache LV  %s", seg->lv->name);
 	} else if (lv_is_cache(lv)) {
 		seg = first_seg(lv);
-		if (inkernel && lv_cache_status(lv, &cache_status)) {
-			log_print("LV Cache pool name     %s", seg->pool_lv->name);
-			log_print("LV Cache origin name   %s", seg_lv(seg, 0)->name);
-		}
+		if (inkernel && !lv_cache_status(lv, &cache_status))
+                        return_0;
+		log_print("LV Cache pool name     %s", seg->pool_lv->name);
+		log_print("LV Cache origin name   %s", seg_lv(seg, 0)->name);
 	} else if (lv_is_cache_pool(lv)) {
 		seg = first_seg(lv);
 		log_print("LV Pool metadata       %s", seg->metadata_lv->name);
@@ -538,7 +533,7 @@ int lvdisplay_full(struct cmd_context *cmd,
 	} else if (lv_is_vdo_pool(lv)) {
 		seg = first_seg(lv);
 		log_print("LV VDO Pool data       %s", seg_lv(seg, 0)->name);
-		if (lv_vdo_pool_status(lv, 0, &vdo_status)) { /* FIXME: flush option? */
+		if (inkernel && lv_vdo_pool_status(lv, 0, &vdo_status)) { /* FIXME: flush option? */
 			log_print("LV VDO Pool usage      %s%%",
 				  display_percent(cmd, vdo_status->usage));
 			log_print("LV VDO Pool saving     %s%%",
@@ -596,12 +591,13 @@ int lvdisplay_full(struct cmd_context *cmd,
 		dm_pool_destroy(cache_status->mem);
 	}

-	if (thin_pool_active) {
+	if (thin_data_active)
 		log_print("Allocated pool data    %s%%",
 			  display_percent(cmd, thin_data_percent));
+
+	if (thin_metadata_active)
 		log_print("Allocated metadata     %s%%",
 			  display_percent(cmd, thin_metadata_percent));
-	}

 	if (thin_active)
 		log_print("Mapped size            %s%%",
--- a/lib/filters/filter-composite.c
+++ b/lib/filters/filter-composite.c
@@ -60,16 +60,13 @@ static void _composite_destroy(struct dev_filter *f)
 	free(f);
 }

-static void _wipe(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
+static void _wipe(struct dev_filter *f)
 {
 	struct dev_filter **filters;

-	for (filters = (struct dev_filter **) f->private; *filters; ++filters) {
-		if (use_filter_name && strcmp((*filters)->name, use_filter_name))
-			continue;
+	for (filters = (struct dev_filter **) f->private; *filters; ++filters)
 		if ((*filters)->wipe)
-			(*filters)->wipe(cmd, *filters, dev, use_filter_name);
-	}
+			(*filters)->wipe(*filters);
 }

 struct dev_filter *composite_filter_create(int n, int use_dev_ext_info, struct dev_filter **filters)
--- a/lib/filters/filter-fwraid.c
+++ b/lib/filters/filter-fwraid.c
@@ -15,7 +15,6 @@
 #include "base/memory/zalloc.h"
 #include "lib/misc/lib.h"
 #include "lib/filters/filter.h"
-#include "lib/commands/toolcontext.h"

 #ifdef UDEV_SYNC_SUPPORT
 #include <libudev.h>
@@ -70,11 +69,6 @@ static int _ignore_fwraid(struct cmd_context *cmd, struct dev_filter *f __attrib
 {
 	int ret;

-	if (cmd->filter_nodata_only)
-		return 1;
-
-	dev->filtered_flags &= ~DEV_FILTERED_FWRAID;
-
 	if (!fwraid_filtering())
 		return 1;

@@ -86,14 +80,12 @@ static int _ignore_fwraid(struct cmd_context *cmd, struct dev_filter *f __attrib
 		else
 			log_debug_devs(MSG_SKIPPING " [%s:%p]", dev_name(dev),
 					dev_ext_name(dev), dev->ext.handle);
-		dev->filtered_flags |= DEV_FILTERED_FWRAID;
 		return 0;
 	}

 	if (ret < 0) {
 		log_debug_devs("%s: Skipping: error in firmware RAID component detection",
 			       dev_name(dev));
-		dev->filtered_flags |= DEV_FILTERED_FWRAID;
 		return 0;
 	}

--- a/lib/filters/filter-internal.c
+++ b/lib/filters/filter-internal.c
@@ -42,8 +42,6 @@ static int _passes_internal(struct cmd_context *cmd, struct dev_filter *f __attr
 {
 	struct device_list *devl;

-	dev->filtered_flags &= ~DEV_FILTERED_INTERNAL;
-
 	if (!internal_filtering())
 		return 1;
 	
@@ -52,7 +50,6 @@ static int _passes_internal(struct cmd_context *cmd, struct dev_filter *f __attr
 			return 1;
 	}
 	
-	dev->filtered_flags |= DEV_FILTERED_INTERNAL;
 	log_debug_devs("%s: Skipping for internal filtering.", dev_name(dev));
 	return 0;
 }
--- a/lib/filters/filter-md.c
+++ b/lib/filters/filter-md.c
@@ -86,11 +86,6 @@ static int _passes_md_filter(struct cmd_context *cmd, struct dev_filter *f __att
 {
 	int ret;

-	if (cmd->filter_nodata_only)
-		return 1;
-
-	dev->filtered_flags &= ~DEV_FILTERED_MD_COMPONENT;
-
 	/*
 	 * When md_component_dectection=0, don't even try to skip md
 	 * components.
@@ -117,14 +112,12 @@ static int _passes_md_filter(struct cmd_context *cmd, struct dev_filter *f __att
 		else
 			log_debug_devs(MSG_SKIPPING " [%s:%p]", dev_name(dev),
 					dev_ext_name(dev), dev->ext.handle);
-		dev->filtered_flags |= DEV_FILTERED_MD_COMPONENT;
 		return 0;
 	}

 	if (ret < 0) {
 		log_debug_devs("%s: Skipping: error in md component detection",
 			       dev_name(dev));
-		dev->filtered_flags |= DEV_FILTERED_MD_COMPONENT;
 		return 0;
 	}

--- a/lib/filters/filter-mpath.c
+++ b/lib/filters/filter-mpath.c
@@ -274,15 +274,12 @@ static int _dev_is_mpath(struct dev_filter *f, struct device *dev)

 static int _ignore_mpath(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
 {
-	dev->filtered_flags &= ~DEV_FILTERED_MPATH_COMPONENT;
-
 	if (_dev_is_mpath(f, dev) == 1) {
 		if (dev->ext.src == DEV_EXT_NONE)
 			log_debug_devs(MSG_SKIPPING, dev_name(dev));
 		else
 			log_debug_devs(MSG_SKIPPING " [%s:%p]", dev_name(dev),
 					dev_ext_name(dev), dev->ext.handle);
-		dev->filtered_flags |= DEV_FILTERED_MPATH_COMPONENT;
 		return 0;
 	}

--- a/lib/filters/filter-partitioned.c
+++ b/lib/filters/filter-partitioned.c
@@ -16,7 +16,6 @@
 #include "base/memory/zalloc.h"
 #include "lib/misc/lib.h"
 #include "lib/filters/filter.h"
-#include "lib/commands/toolcontext.h"

 #define MSG_SKIPPING "%s: Skipping: Partition table signature found"

@@ -25,11 +24,6 @@ static int _passes_partitioned_filter(struct cmd_context *cmd, struct dev_filter
 	struct dev_types *dt = (struct dev_types *) f->private;
 	int ret;

-	if (cmd->filter_nodata_only)
-		return 1;
-
-	dev->filtered_flags &= ~DEV_FILTERED_PARTITIONED;
-
 	ret = dev_is_partitioned(dt, dev);

 	if (ret == -EAGAIN) {
@@ -45,7 +39,6 @@ static int _passes_partitioned_filter(struct cmd_context *cmd, struct dev_filter
 		else
 			log_debug_devs(MSG_SKIPPING " [%s:%p]", dev_name(dev),
 					dev_ext_name(dev), dev->ext.handle);
-		dev->filtered_flags |= DEV_FILTERED_PARTITIONED;
 		return 0;
 	}

--- a/lib/filters/filter-persistent.c
+++ b/lib/filters/filter-persistent.c
@@ -64,17 +64,11 @@ static int _init_hash(struct pfilter *pf)
 	return 1;
 }

-static void _persistent_filter_wipe(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
+static void _persistent_filter_wipe(struct dev_filter *f)
 {
 	struct pfilter *pf = (struct pfilter *) f->private;
-	struct dm_str_list *sl;

-	if (!dev) {
-		dm_hash_wipe(pf->devices);
-	} else {
-		dm_list_iterate_items(sl, &dev->aliases)
-			dm_hash_remove(pf->devices, sl->str);
-	}
+	dm_hash_wipe(pf->devices);
 }

 static int _lookup_p(struct cmd_context *cmd, struct dev_filter *f, struct device *dev, const char *use_filter_name)
--- a/lib/filters/filter-regex.c
+++ b/lib/filters/filter-regex.c
@@ -151,8 +151,6 @@ static int _accept_p(struct cmd_context *cmd, struct dev_filter *f, struct devic
 	struct rfilter *rf = (struct rfilter *) f->private;
 	struct dm_str_list *sl;

-	dev->filtered_flags &= ~DEV_FILTERED_REGEX;
-
 	dm_list_iterate_items(sl, &dev->aliases) {
 		m = dm_regex_match(rf->engine, sl->str);

@@ -170,10 +168,8 @@ static int _accept_p(struct cmd_context *cmd, struct dev_filter *f, struct devic
 		first = 0;
 	}

-	if (rejected) {
-		dev->filtered_flags |= DEV_FILTERED_REGEX;
+	if (rejected)
 		log_debug_devs("%s: Skipping (regex)", dev_name(dev));
-	}

 	/*
 	 * pass everything that doesn't match
--- a/lib/filters/filter-signature.c
+++ b/lib/filters/filter-signature.c
@@ -16,7 +16,6 @@
 #include "base/memory/zalloc.h"
 #include "lib/misc/lib.h"
 #include "lib/filters/filter.h"
-#include "lib/commands/toolcontext.h"

 #ifdef __linux__

@@ -28,11 +27,6 @@ static int _ignore_signature(struct cmd_context *cmd, struct dev_filter *f __att
 	char buf[BUFSIZE];
 	int ret = 0;

-	if (cmd->filter_nodata_only)
-		return 1;
-
-	dev->filtered_flags &= ~DEV_FILTERED_SIGNATURE;
-
 	if (!scan_bcache) {
 		/* let pass, call again after scan */
 		log_debug_devs("filter signature deferred %s", dev_name(dev));
@@ -46,21 +40,18 @@ static int _ignore_signature(struct cmd_context *cmd, struct dev_filter *f __att
 		log_debug_devs("%s: Skipping: error in signature detection",
 			       dev_name(dev));
 		ret = 0;
-		dev->filtered_flags |= DEV_FILTERED_SIGNATURE;
 		goto out;
 	}

 	if (dev_is_lvm1(dev, buf, BUFSIZE)) {
 		log_debug_devs("%s: Skipping lvm1 device", dev_name(dev));
 		ret = 0;
-		dev->filtered_flags |= DEV_FILTERED_SIGNATURE;
 		goto out;
 	}

 	if (dev_is_pool(dev, buf, BUFSIZE)) {
 		log_debug_devs("%s: Skipping gfs-pool device", dev_name(dev));
 		ret = 0;
-		dev->filtered_flags |= DEV_FILTERED_SIGNATURE;
 		goto out;
 	}
 	ret = 1;
--- a/lib/filters/filter-sysfs.c
+++ b/lib/filters/filter-sysfs.c
@@ -264,8 +264,6 @@ static int _accept_p(struct cmd_context *cmd, struct dev_filter *f, struct devic
 {
 	struct dev_set *ds = (struct dev_set *) f->private;

-	dev->filtered_flags &= ~DEV_FILTERED_SYSFS;
-
 	if (!ds->initialised)
 		_init_devs(ds);

@@ -275,7 +273,6 @@ static int _accept_p(struct cmd_context *cmd, struct dev_filter *f, struct devic

 	if (!_set_lookup(ds, dev->dev)) {
 		log_debug_devs("%s: Skipping (sysfs)", dev_name(dev));
-		dev->filtered_flags |= DEV_FILTERED_SYSFS;
 		return 0;
 	}

--- a/lib/filters/filter-type.c
+++ b/lib/filters/filter-type.c
@@ -22,13 +22,10 @@ static int _passes_lvm_type_device_filter(struct cmd_context *cmd, struct dev_fi
 	struct dev_types *dt = (struct dev_types *) f->private;
 	const char *name = dev_name(dev);

-	dev->filtered_flags &= ~DEV_FILTERED_DEVTYPE;
-
 	/* Is this a recognised device type? */
 	if (!dt->dev_type_array[MAJOR(dev->dev)].max_partitions) {
 		log_debug_devs("%s: Skipping: Unrecognised LVM device type %"
 			       PRIu64, name, (uint64_t) MAJOR(dev->dev));
-		dev->filtered_flags |= DEV_FILTERED_DEVTYPE;
 		return 0;
 	}

--- a/lib/filters/filter-usable.c
+++ b/lib/filters/filter-usable.c
@@ -113,9 +113,6 @@ static int _passes_usable_filter(struct cmd_context *cmd, struct dev_filter *f,
 	struct dev_usable_check_params ucp = {0};
 	int r = 1;

-	dev->filtered_flags &= ~DEV_FILTERED_MINSIZE;
-	dev->filtered_flags &= ~DEV_FILTERED_UNUSABLE;
-
 	/* further checks are done on dm devices only */
 	if (dm_is_dm_major(MAJOR(dev->dev))) {
 		switch (mode) {
@@ -145,10 +142,8 @@ static int _passes_usable_filter(struct cmd_context *cmd, struct dev_filter *f,
 			break;
 		}

-		if (!(r = device_is_usable(dev, ucp))) {
-			dev->filtered_flags |= DEV_FILTERED_UNUSABLE;
+		if (!(r = device_is_usable(dev, ucp)))
 			log_debug_devs("%s: Skipping unusable device.", dev_name(dev));
-		}
 	}

 	if (r) {
@@ -158,8 +153,6 @@ static int _passes_usable_filter(struct cmd_context *cmd, struct dev_filter *f,
 			/* fall through */
 		case FILTER_MODE_PRE_LVMETAD:
 			r = _check_pv_min_size(dev);
-			if (!r)
-				dev->filtered_flags |= DEV_FILTERED_MINSIZE;
 			break;
 		case FILTER_MODE_POST_LVMETAD:
 			/* nothing to do here */
--- a/lib/filters/filter.h
+++ b/lib/filters/filter.h
@@ -52,16 +52,4 @@ typedef enum {
 } filter_mode_t;
 struct dev_filter *usable_filter_create(struct cmd_context *cmd, struct dev_types *dt, filter_mode_t mode);

-#define DEV_FILTERED_FWRAID		0x00000001
-#define DEV_FILTERED_INTERNAL		0x00000002
-#define DEV_FILTERED_MD_COMPONENT	0x00000004
-#define DEV_FILTERED_MPATH_COMPONENT	0x00000008
-#define DEV_FILTERED_PARTITIONED	0x00000010
-#define DEV_FILTERED_REGEX		0x00000020
-#define DEV_FILTERED_SIGNATURE		0x00000040
-#define DEV_FILTERED_SYSFS		0x00000080
-#define DEV_FILTERED_DEVTYPE		0x00000100
-#define DEV_FILTERED_MINSIZE		0x00000200
-#define DEV_FILTERED_UNUSABLE		0x00000400
-
 #endif 	/* _LVM_FILTER_H */
--- a/lib/format_text/archiver.c
+++ b/lib/format_text/archiver.c
@@ -315,7 +315,7 @@ struct volume_group *backup_read_vg(struct cmd_context *cmd,
 	}

 	dm_list_iterate_items(mda, &tf->metadata_areas_in_use) {
-		if (!(vg = mda->ops->vg_read(cmd, tf, vg_name, mda, NULL, NULL)))
+		if (!(vg = mda->ops->vg_read(tf, vg_name, mda, NULL, NULL)))
 			stack;
 		break;
 	}
--- a/lib/format_text/flags.c
+++ b/lib/format_text/flags.c
@@ -72,8 +72,7 @@ static const struct flag _lv_flags[] = {
 	{LV_ACTIVATION_SKIP, "ACTIVATION_SKIP", COMPATIBLE_FLAG},
 	{LV_ERROR_WHEN_FULL, "ERROR_WHEN_FULL", COMPATIBLE_FLAG},
 	{LV_METADATA_FORMAT, "METADATA_FORMAT", SEGTYPE_FLAG},
-	{LV_CACHE_VOL, "CACHE_VOL", COMPATIBLE_FLAG},
-	{LV_CACHE_USES_CACHEVOL, "CACHE_USES_CACHEVOL", SEGTYPE_FLAG},
+	{LV_CACHE_VOL, "CACHE_VOL", STATUS_FLAG},
 	{LV_NOSCAN, NULL, 0},
 	{LV_TEMPORARY, NULL, 0},
 	{POOL_METADATA_SPARE, NULL, 0},
@@ -104,8 +103,6 @@ static const struct flag _lv_flags[] = {
 	{LV_VDO_POOL, NULL, 0},
 	{LV_VDO_POOL_DATA, NULL, 0},
 	{WRITECACHE, NULL, 0},
-	{INTEGRITY, NULL, 0},
-	{INTEGRITY_METADATA, NULL, 0},
 	{LV_PENDING_DELETE, NULL, 0}, /* FIXME Display like COMPATIBLE_FLAG */
 	{LV_REMOVED, NULL, 0},
 	{0, NULL, 0}
@@ -195,21 +192,12 @@ int read_flags(uint64_t *status, enum pv_vg_lv_e type, int mask, const struct dm
 			return 0;
 		}

-		/*
-		 * For a short time CACHE_VOL was a STATUS_FLAG, then it
-		 * was changed to COMPATIBLE_FLAG, so we want to read it
-		 * from either place.
-		 */
-		if (type == LV_FLAGS && !strcmp(cv->v.str, "CACHE_VOL"))
-			mask = (STATUS_FLAG | COMPATIBLE_FLAG);
-
-		for (f = 0; flags[f].description; f++) {
+		for (f = 0; flags[f].description; f++)
 			if ((flags[f].kind & mask) &&
 			    !strcmp(flags[f].description, cv->v.str)) {
 				s |= flags[f].mask;
 				break;
 			}
-		}

 		if (type == VG_FLAGS && !strcmp(cv->v.str, "PARTIAL")) {
 			/*
--- a/lib/format_text/format-text.c
+++ b/lib/format_text/format-text.c
@@ -41,35 +41,8 @@ struct text_fid_context {
 	char *write_buf;         /* buffer containing metadata text to write to disk */
 	uint32_t write_buf_size; /* mem size of write_buf, increases in 64K multiples */
 	uint32_t new_metadata_size; /* size of text metadata in buf */
-	unsigned preserve:1;
 };

-void preserve_text_fidtc(struct volume_group *vg)
-{
-	struct format_instance *fid = vg->fid;
-	struct text_fid_context *fidtc = (struct text_fid_context *)fid->private;
-
-	if (fidtc)
-		fidtc->preserve = 1;
-}
-
-void free_text_fidtc(struct volume_group *vg)
-{
-	struct format_instance *fid = vg->fid;
-	struct text_fid_context *fidtc = (struct text_fid_context *)fid->private;
-
-	if (!fidtc)
-		return;
-
-	fidtc->preserve = 0;
-
-	if (fidtc->write_buf)
-		free(fidtc->write_buf);
-	fidtc->write_buf = NULL;
-	fidtc->write_buf_size = 0;
-	fidtc->new_metadata_size = 0;
-}
-
 int rlocn_is_ignored(const struct raw_locn *rlocn)
 {
 	return (rlocn->flags & RAW_LOCN_IGNORED ? 1 : 0);
@@ -277,7 +250,8 @@ static int _raw_write_mda_header(const struct format_type *fmt,
 	dev_set_last_byte(dev, start_byte + MDA_HEADER_SIZE);

 	if (!dev_write_bytes(dev, start_byte, MDA_HEADER_SIZE, mdah)) {
-		log_error("Failed to write mda header to %s.", dev_name(dev));
+		dev_unset_last_byte(dev);
+		log_error("Failed to write mda header to %s fd %d", dev_name(dev), dev->bcache_fd);
 		return 0;
 	}
 	dev_unset_last_byte(dev);
@@ -290,8 +264,7 @@ static int _raw_write_mda_header(const struct format_type *fmt,
 * in the label scanning path.
 */

-static struct raw_locn *_read_metadata_location_vg(struct cmd_context *cmd,
-				       struct device_area *dev_area,
+static struct raw_locn *_read_metadata_location_vg(struct device_area *dev_area,
 				       struct mda_header *mdah, int primary_mda,
 				       const char *vgname,
 				       int *precommitted)
@@ -305,8 +278,6 @@ static struct raw_locn *_read_metadata_location_vg(struct cmd_context *cmd,
 	};
 	int rlocn_was_ignored;

-	dm_list_init(&vgsummary_orphan.pvsummaries);
-
 	memcpy(&vgsummary_orphan.vgid, FMT_TEXT_ORPHAN_VG_NAME, sizeof(FMT_TEXT_ORPHAN_VG_NAME));

 	rlocn = mdah->raw_locns;	/* Slot 0 */
@@ -342,7 +313,7 @@ static struct raw_locn *_read_metadata_location_vg(struct cmd_context *cmd,
 	 * Don't try to check existing metadata
 	 * if given vgname is an empty string.
 	 */
-	if (!vgname || !*vgname)
+	if (!*vgname)
 		return rlocn;

 	/*
@@ -370,7 +341,7 @@ static struct raw_locn *_read_metadata_location_vg(struct cmd_context *cmd,
 		  vgnamebuf, vgname);

 	if ((info = lvmcache_info_from_pvid(dev_area->dev->pvid, dev_area->dev, 0)) &&
-	    !lvmcache_update_vgname_and_id(cmd, info, &vgsummary_orphan))
+	    !lvmcache_update_vgname_and_id(info, &vgsummary_orphan))
 		stack;

 	return NULL;
@@ -448,8 +419,7 @@ static uint64_t _next_rlocn_offset(struct volume_group *vg, struct raw_locn *rlo
 	return new_start;
 }

-static struct volume_group *_vg_read_raw_area(struct cmd_context *cmd,
-					      struct format_instance *fid,
+static struct volume_group *_vg_read_raw_area(struct format_instance *fid,
 					      const char *vgname,
 					      struct device_area *area,
 					      struct cached_vg_fmtdata **vg_fmtdata,
@@ -470,7 +440,7 @@ static struct volume_group *_vg_read_raw_area(struct cmd_context *cmd,
 		goto out;
 	}

-	if (!(rlocn = _read_metadata_location_vg(cmd, area, mdah, primary_mda, vgname, &precommitted))) {
+	if (!(rlocn = _read_metadata_location_vg(area, mdah, primary_mda, vgname, &precommitted))) {
 		log_debug_metadata("VG %s not found on %s", vgname, dev_name(area->dev));
 		goto out;
 	}
@@ -505,8 +475,7 @@ static struct volume_group *_vg_read_raw_area(struct cmd_context *cmd,
 	return vg;
 }

-static struct volume_group *_vg_read_raw(struct cmd_context *cmd,
-					 struct format_instance *fid,
+static struct volume_group *_vg_read_raw(struct format_instance *fid,
 					 const char *vgname,
 					 struct metadata_area *mda,
 					 struct cached_vg_fmtdata **vg_fmtdata,
@@ -515,13 +484,12 @@ static struct volume_group *_vg_read_raw(struct cmd_context *cmd,
 	struct mda_context *mdac = (struct mda_context *) mda->metadata_locn;
 	struct volume_group *vg;

-	vg = _vg_read_raw_area(cmd, fid, vgname, &mdac->area, vg_fmtdata, use_previous_vg, 0, mda_is_primary(mda));
+	vg = _vg_read_raw_area(fid, vgname, &mdac->area, vg_fmtdata, use_previous_vg, 0, mda_is_primary(mda));

 	return vg;
 }

-static struct volume_group *_vg_read_precommit_raw(struct cmd_context *cmd,
-						   struct format_instance *fid,
+static struct volume_group *_vg_read_precommit_raw(struct format_instance *fid,
 						   const char *vgname,
 						   struct metadata_area *mda,
 						   struct cached_vg_fmtdata **vg_fmtdata,
@@ -530,11 +498,34 @@ static struct volume_group *_vg_read_precommit_raw(struct cmd_context *cmd,
 	struct mda_context *mdac = (struct mda_context *) mda->metadata_locn;
 	struct volume_group *vg;

-	vg = _vg_read_raw_area(cmd, fid, vgname, &mdac->area, vg_fmtdata, use_previous_vg, 1, mda_is_primary(mda));
+	vg = _vg_read_raw_area(fid, vgname, &mdac->area, vg_fmtdata, use_previous_vg, 1, mda_is_primary(mda));

 	return vg;
 }

+#define MAX_DESC_LEN 2048
+
+static char *_build_desc_write(struct cmd_context *cmd, struct volume_group *vg)
+{
+	size_t len = strlen(cmd->cmd_line) + 32;
+	char *desc;
+
+	if (len > MAX_DESC_LEN)
+		len = MAX_DESC_LEN;
+
+	if (!(desc = zalloc(len)))
+		return_NULL;
+
+	vg->write_count++;
+
+	if (vg->write_count == 1)
+		dm_snprintf(desc, len, "Write from %s.", cmd->cmd_line);
+	else
+		dm_snprintf(desc, len, "Write[%u] from %s.", vg->write_count, cmd->cmd_line);
+
+	return desc;
+}
+
 /*
 * VG metadata updates:
 *
@@ -579,7 +570,6 @@ static struct volume_group *_vg_read_precommit_raw(struct cmd_context *cmd,
 static int _vg_write_raw(struct format_instance *fid, struct volume_group *vg,
 			 struct metadata_area *mda)
 {
-	char desc[2048];
 	struct mda_context *mdac = (struct mda_context *) mda->metadata_locn;
 	struct text_fid_context *fidtc = (struct text_fid_context *) fid->private;
 	struct raw_locn *rlocn_old;
@@ -654,15 +644,12 @@ static int _vg_write_raw(struct format_instance *fid, struct volume_group *vg,
 		write_buf_size = fidtc->write_buf_size;
 		new_size = fidtc->new_metadata_size;
 	} else {
-		if (!vg->write_count++)
-			(void) dm_snprintf(desc, sizeof(desc), "Write from %s.", vg->cmd->cmd_line);
-		else
-			(void) dm_snprintf(desc, sizeof(desc), "Write[%u] from %s.", vg->write_count, vg->cmd->cmd_line);
-
+		char *desc = _build_desc_write(fid->fmt->cmd, vg);
 		new_size = text_vg_export_raw(vg, desc, &write_buf, &write_buf_size);
 		fidtc->write_buf = write_buf;
 		fidtc->write_buf_size = write_buf_size;
 		fidtc->new_metadata_size = new_size;
+		free(desc);
 	}

 	if (!new_size || !write_buf) {
@@ -972,7 +959,8 @@ static int _vg_write_raw(struct format_instance *fid, struct volume_group *vg,
 			   (unsigned long long)write2_size);

 	if (!dev_write_bytes(mdac->area.dev, write1_start, (size_t)write1_size, write_buf)) {
-		log_error("Failed to write metadata to %s.", devname);
+		log_error("Failed to write metadata to %s fd %d", devname, mdac->area.dev->bcache_fd);
+		dev_unset_last_byte(mdac->area.dev);
 		goto out;
 	}

@@ -984,7 +972,8 @@ static int _vg_write_raw(struct format_instance *fid, struct volume_group *vg,

 		if (!dev_write_bytes(mdac->area.dev, write2_start, write2_size,
 				     write_buf + new_size - new_wrap)) {
-			log_error("Failed to write metadata wrap to %s", devname);
+			log_error("Failed to write metadata wrap to %s fd %d", devname, mdac->area.dev->bcache_fd);
+			dev_unset_last_byte(mdac->area.dev);
 			goto out;
 		}
 	}
@@ -1192,7 +1181,7 @@ static int _vg_commit_raw_rlocn(struct format_instance *fid,
 	r = 1;

      out:
-	if (!precommit && !fidtc->preserve) {
+	if (!precommit) {
 		free(fidtc->write_buf);
 		fidtc->write_buf = NULL;
 		fidtc->write_buf_size = 0;
@@ -1325,7 +1314,7 @@ static struct volume_group *_vg_read_file_name(struct format_instance *fid,
 	return vg;
 }

-static struct volume_group *_vg_read_file(struct cmd_context *cmd, struct format_instance *fid,
+static struct volume_group *_vg_read_file(struct format_instance *fid,
 					  const char *vgname,
 					  struct metadata_area *mda,
 					  struct cached_vg_fmtdata **vg_fmtdata,
@@ -1336,7 +1325,7 @@ static struct volume_group *_vg_read_file(struct cmd_context *cmd, struct format
 	return _vg_read_file_name(fid, vgname, tc->path_live);
 }

-static struct volume_group *_vg_read_precommit_file(struct cmd_context *cmd, struct format_instance *fid,
+static struct volume_group *_vg_read_precommit_file(struct format_instance *fid,
 						    const char *vgname,
 						    struct metadata_area *mda,
 						    struct cached_vg_fmtdata **vg_fmtdata,
@@ -1511,7 +1500,6 @@ static int _vg_remove_file(struct format_instance *fid __attribute__((unused)),
 }

 int read_metadata_location_summary(const struct format_type *fmt,
-		    struct metadata_area *mda,
 		    struct mda_header *mdah, int primary_mda, struct device_area *dev_area,
 		    struct lvmcache_vgsummary *vgsummary, uint64_t *mda_free_sectors)
 {
@@ -1569,17 +1557,6 @@ int read_metadata_location_summary(const struct format_type *fmt,
 		return 0;
 	}

-	/*
-	 * This function is used to read the vg summary during label scan.
-	 * Save the text start location and checksum during scan.  After the VG
-	 * lock is acquired in vg_read, we can reread the mda_header, and
-	 * compare rlocn->offset,checksum to what was saved during scan.  If
-	 * unchanged, it means that the metadata was not changed between scan
-	 * and the read.
-	 */
-	mda->scan_text_offset = rlocn->offset;
-	mda->scan_text_checksum = rlocn->checksum;
-
 	/*
 	 * When the current metadata wraps around the end of the metadata area
 	 * (so some is located at the end and some is located at the
@@ -1717,7 +1694,7 @@ static int _set_ext_flags(struct physical_volume *pv, struct lvmcache_info *info
 }

 /* Only for orphans - FIXME That's not true any more */
-static int _text_pv_write(struct cmd_context *cmd, const struct format_type *fmt, struct physical_volume *pv)
+static int _text_pv_write(const struct format_type *fmt, struct physical_volume *pv)
 {
 	struct format_instance *fid = pv->fid;
 	const char *pvid = (const char *) (*pv->old_id.uuid ? &pv->old_id : &pv->id);
@@ -1729,7 +1706,7 @@ static int _text_pv_write(struct cmd_context *cmd, const struct format_type *fmt
 	unsigned mda_index;

 	/* Add a new cache entry with PV info or update existing one. */
-	if (!(info = lvmcache_add(cmd, fmt->labeller, (const char *) &pv->id,
+	if (!(info = lvmcache_add(fmt->labeller, (const char *) &pv->id,
 				  pv->dev,  pv->label_sector, pv->vg_name,
 				  is_orphan_vg(pv->vg_name) ? pv->vg_name : pv->vg ? (const char *) &pv->vg->id : NULL, 0, NULL)))
 		return_0;
@@ -2216,10 +2193,8 @@ static int _create_vg_text_instance(struct format_instance *fid,
 		}

 		if (type & FMT_INSTANCE_MDAS) {
-			if (!(vginfo = lvmcache_vginfo_from_vgname(vg_name, vg_id))) {
-				log_debug("No cached vginfo for VG %s and ID %s.", vg_name, vg_id);
-				goto out;
-			}
+			if (!(vginfo = lvmcache_vginfo_from_vgname(vg_name, vg_id)))
+				goto_out;
 			if (!lvmcache_fid_add_mdas_vg(vginfo, fid))
 				goto_out;
 		}
--- a/lib/format_text/format-text.h
+++ b/lib/format_text/format-text.h
@@ -80,7 +80,4 @@ struct data_area_list {
 int text_wipe_outdated_pv_mda(struct cmd_context *cmd, struct device *dev,
                              struct metadata_area *mda);

-void preserve_text_fidtc(struct volume_group *vg);
-void free_text_fidtc(struct volume_group *vg);
-
 #endif
--- a/lib/format_text/import-export.h
+++ b/lib/format_text/import-export.h
@@ -47,15 +47,11 @@ enum pv_vg_lv_e {

 struct text_vg_version_ops {
 	int (*check_version) (const struct dm_config_tree * cf);
-
-	struct volume_group *(*read_vg) (struct cmd_context *cmd,
-					 const struct format_type *fmt,
-					 struct format_instance *fid,
-					 const struct dm_config_tree *cft);
-
+	struct volume_group *(*read_vg) (struct format_instance * fid,
+					 const struct dm_config_tree *cf,
+					 unsigned allow_lvmetad_extensions);
 	void (*read_desc) (struct dm_pool * mem, const struct dm_config_tree *cf,
 			   time_t *when, char **desc);
-
 	int (*read_vgsummary) (const struct format_type *fmt,
 			       const struct dm_config_tree *cft,
 			       struct lvmcache_vgsummary *vgsummary);
--- a/lib/format_text/import.c
+++ b/lib/format_text/import.c
@@ -15,7 +15,6 @@

 #include "lib/misc/lib.h"
 #include "lib/metadata/metadata.h"
-#include "lib/commands/toolcontext.h"
 #include "import-export.h"

 /* FIXME Use tidier inclusion method */
@@ -182,7 +181,7 @@ struct volume_group *text_read_metadata(struct format_instance *fid,
 		if (!(*vsn)->check_version(cft))
 			continue;

-		if (!(vg = (*vsn)->read_vg(fid->fmt->cmd, fid->fmt, fid, cft)))
+		if (!(vg = (*vsn)->read_vg(fid, cft, 0)))
 			goto_out;

 		(*vsn)->read_desc(vg->vgmem, cft, when, desc);
@@ -211,9 +210,9 @@ struct volume_group *text_read_metadata_file(struct format_instance *fid,
 				  when, desc);
 }

-static struct volume_group *_import_vg_from_config_tree(struct cmd_context *cmd,
+static struct volume_group *_import_vg_from_config_tree(const struct dm_config_tree *cft,
 							struct format_instance *fid,
-							const struct dm_config_tree *cft)
+							unsigned allow_lvmetad_extensions)
 {
 	struct volume_group *vg = NULL;
 	struct text_vg_version_ops **vsn;
@@ -228,7 +227,7 @@ static struct volume_group *_import_vg_from_config_tree(struct cmd_context *cmd,
 		 * The only path to this point uses cached vgmetadata,
 		 * so it can use cached PV state too.
 		 */
-		if (!(vg = (*vsn)->read_vg(cmd, fid->fmt, fid, cft)))
+		if (!(vg = (*vsn)->read_vg(fid, cft, allow_lvmetad_extensions)))
 			stack;
 		else {
 			set_pv_devices(fid, vg, NULL);
@@ -244,21 +243,8 @@ static struct volume_group *_import_vg_from_config_tree(struct cmd_context *cmd,
 	return vg;
 }

-struct volume_group *import_vg_from_config_tree(struct cmd_context *cmd,
-						struct format_instance *fid,
-						const struct dm_config_tree *cft)
+struct volume_group *import_vg_from_config_tree(const struct dm_config_tree *cft,
+						struct format_instance *fid)
 {
-	return _import_vg_from_config_tree(cmd, fid, cft);
+	return _import_vg_from_config_tree(cft, fid, 0);
 }
-
-struct volume_group *vg_from_config_tree(struct cmd_context *cmd, const struct dm_config_tree *cft)
-{
-	static struct text_vg_version_ops *ops;
-
-	_init_text_import();
-
-	ops = _text_vsn_list[0];
-
-	return ops->read_vg(cmd, cmd->fmt, NULL, cft);
-}
-
--- a/lib/format_text/import_vsn1.c
+++ b/lib/format_text/import_vsn1.c
@@ -27,16 +27,11 @@
 #include "lib/config/defaults.h"
 #include "lib/datastruct/str_list.h"

-typedef int (*section_fn) (struct cmd_context *cmd,
-			   struct format_type *fmt,
-			   struct format_instance *fid,
-			   struct dm_pool *mem,
-			   struct volume_group *vg,
-			   struct lvmcache_vgsummary *vgsummary,
-			   const struct dm_config_node *pvn,
-			   const struct dm_config_node *vgn,
-			   struct dm_hash_table *pv_hash,
-			   struct dm_hash_table *lv_hash);
+typedef int (*section_fn) (struct format_instance * fid,
+			   struct volume_group * vg, const struct dm_config_node * pvn,
+			   const struct dm_config_node * vgn,
+			   struct dm_hash_table * pv_hash,
+			   struct dm_hash_table * lv_hash);

 #define _read_int32(root, path, result) \
 	dm_config_get_uint32(root, path, (uint32_t *) (result))
@@ -174,21 +169,16 @@ static int _read_str_list(struct dm_pool *mem, struct dm_list *list, const struc
 	return 1;
 }

-static int _read_pv(struct cmd_context *cmd,
-		    struct format_type *fmt,
-		    struct format_instance *fid,
-		    struct dm_pool *mem,
-		    struct volume_group *vg,
-		    struct lvmcache_vgsummary *vgsummary,
-		    const struct dm_config_node *pvn,
+static int _read_pv(struct format_instance *fid,
+		    struct volume_group *vg, const struct dm_config_node *pvn,
 		    const struct dm_config_node *vgn __attribute__((unused)),
 		    struct dm_hash_table *pv_hash,
 		    struct dm_hash_table *lv_hash __attribute__((unused)))
 {
+	struct dm_pool *mem = vg->vgmem;
 	struct physical_volume *pv;
 	struct pv_list *pvl;
 	const struct dm_config_value *cv;
-	const char *device_hint;
 	uint64_t size, ba_start;

 	if (!(pvl = dm_pool_zalloc(mem, sizeof(*pvl))) ||
@@ -233,11 +223,6 @@ static int _read_pv(struct cmd_context *cmd,
 		return 0;
 	}

-	if (dm_config_get_str(pvn, "device", &device_hint)) {
-		if (!(pv->device_hint = dm_pool_strdup(mem, device_hint)))
-			log_error("Failed to allocate memory for device hint in read_pv.");
-	}
-
 	if (!_read_uint64(pvn, "pe_start", &pv->pe_start)) {
 		log_error("Couldn't read extent start value (pe_start) "
 			  "for physical volume.");
@@ -281,7 +266,7 @@ static int _read_pv(struct cmd_context *cmd,

 	pv->pe_alloc_count = 0;
 	pv->pe_align = 0;
-	pv->fmt = fmt;
+	pv->fmt = fid->fmt;

 	if (!alloc_pv_segment_whole_pv(mem, pv))
 		return_0;
@@ -293,49 +278,6 @@ static int _read_pv(struct cmd_context *cmd,
 	return 1;
 }

-static int _read_pvsummary(struct cmd_context *cmd,
-			   struct format_type *fmt,
-			   struct format_instance *fid,
-			   struct dm_pool *mem,
-			   struct volume_group *vg,
-			   struct lvmcache_vgsummary *vgsummary,
-			   const struct dm_config_node *pvn,
-			   const struct dm_config_node *vgn __attribute__((unused)),
-			   struct dm_hash_table *pv_hash __attribute__((unused)),
-			   struct dm_hash_table *lv_hash __attribute__((unused)))
-{
-	struct physical_volume *pv;
-	struct pv_list *pvl;
-	const char *device_hint;
-
-	if (!(pvl = dm_pool_zalloc(mem, sizeof(*pvl))) ||
-	    !(pvl->pv = dm_pool_zalloc(mem, sizeof(*pvl->pv))))
-		return_0;
-
-	pv = pvl->pv;
-
-	if (!(pvn = pvn->child)) {
-		log_error("Empty pv section.");
-		return 0;
-	}
-
-	if (!_read_id(&pv->id, pvn, "id"))
-		log_warn("Couldn't read uuid for physical volume.");
-
-	if (dm_config_has_node(pvn, "dev_size") &&
-	    !_read_uint64(pvn, "dev_size", &pv->size))
-		log_warn("Couldn't read dev size for physical volume.");
-
-	if (dm_config_get_str(pvn, "device", &device_hint)) {
-		if (!(pv->device_hint = dm_pool_strdup(mem, device_hint)))
-			log_error("Failed to allocate memory for device hint in read_pv.");
-	}
-
-	dm_list_add(&vgsummary->pvsummaries, &pvl->list);
-
-	return 1;
-}
-
 static void _insert_segment(struct logical_volume *lv, struct lv_segment *seg)
 {
 	struct lv_segment *comp;
@@ -351,13 +293,10 @@ static void _insert_segment(struct logical_volume *lv, struct lv_segment *seg)
 	dm_list_add(&lv->segments, &seg->list);
 }

-static int _read_segment(struct cmd_context *cmd,
-			 struct format_type *fmt,
-			 struct format_instance *fid,
-			 struct dm_pool *mem,
-			 struct logical_volume *lv, const struct dm_config_node *sn,
+static int _read_segment(struct logical_volume *lv, const struct dm_config_node *sn,
 			 struct dm_hash_table *pv_hash)
 {
+	struct dm_pool *mem = lv->vg->vgmem;
 	uint32_t area_count = 0u;
 	struct lv_segment *seg;
 	const struct dm_config_node *sn_child = sn->child;
@@ -409,7 +348,7 @@ static int _read_segment(struct cmd_context *cmd,
 	       return 0;
 	}

-	if (!(segtype = get_segtype_from_string(cmd, segtype_with_flags)))
+	if (!(segtype = get_segtype_from_string(lv->vg->cmd, segtype_with_flags)))
 		return_0;

 	/* Can drop temporary string here as nothing has allocated from VGMEM meanwhile */
@@ -526,11 +465,7 @@ int text_import_areas(struct lv_segment *seg, const struct dm_config_node *sn,
 	return 1;
 }

-static int _read_segments(struct cmd_context *cmd,
-			  struct format_type *fmt,
-			  struct format_instance *fid,
-			  struct dm_pool *mem,
-			  struct logical_volume *lv, const struct dm_config_node *lvn,
+static int _read_segments(struct logical_volume *lv, const struct dm_config_node *lvn,
 			  struct dm_hash_table *pv_hash)
 {
 	const struct dm_config_node *sn;
@@ -542,7 +477,7 @@ static int _read_segments(struct cmd_context *cmd,
 		 * All sub-sections are assumed to be segments.
 		 */
 		if (!sn->v) {
-			if (!_read_segment(cmd, fmt, fid, mem, lv, sn, pv_hash))
+			if (!_read_segment(lv, sn, pv_hash))
 				return_0;

 			count++;
@@ -581,17 +516,13 @@ static int _read_segments(struct cmd_context *cmd,
 	return 1;
 }

-static int _read_lvnames(struct cmd_context *cmd,
-			 struct format_type *fmt,
-			 struct format_instance *fid __attribute__((unused)),
-			 struct dm_pool *mem,
-			 struct volume_group *vg,
-			 struct lvmcache_vgsummary *vgsummary,
-			 const struct dm_config_node *lvn,
+static int _read_lvnames(struct format_instance *fid __attribute__((unused)),
+			 struct volume_group *vg, const struct dm_config_node *lvn,
 			 const struct dm_config_node *vgn __attribute__((unused)),
 			 struct dm_hash_table *pv_hash __attribute__((unused)),
 			 struct dm_hash_table *lv_hash)
 {
+	struct dm_pool *mem = vg->vgmem;
 	struct logical_volume *lv;
 	const char *str;
 	const struct dm_config_value *cv;
@@ -681,7 +612,7 @@ static int _read_lvnames(struct cmd_context *cmd,
 	if (dm_config_get_str(lvn, "profile", &str)) {
 		log_debug_metadata("Adding profile configuration %s for LV %s.",
 				   str, display_lvname(lv));
-		if (!(lv->profile = add_profile(cmd, str, CONFIG_PROFILE_METADATA))) {
+		if (!(lv->profile = add_profile(vg->cmd, str, CONFIG_PROFILE_METADATA))) {
 			log_error("Failed to add configuration profile %s for LV %s.",
 				  str, display_lvname(lv));
 			return 0;
@@ -690,7 +621,7 @@ static int _read_lvnames(struct cmd_context *cmd,

 	if (!_read_int32(lvn, "read_ahead", &lv->read_ahead))
 		/* If not present, choice of auto or none is configurable */
-		lv->read_ahead = cmd->default_settings.read_ahead;
+		lv->read_ahead = vg->cmd->default_settings.read_ahead;
 	else {
 		switch (lv->read_ahead) {
 		case 0:
@@ -740,17 +671,13 @@ static int _read_lvnames(struct cmd_context *cmd,
 	return 1;
 }

-static int _read_historical_lvnames(struct cmd_context *cmd,
-				    struct format_type *fmt,
-				    struct format_instance *fid __attribute__((unused)),
-				     struct dm_pool *mem,
-				     struct volume_group *vg,
-				     struct lvmcache_vgsummary *vgsummary,
-				     const struct dm_config_node *hlvn,
+static int _read_historical_lvnames(struct format_instance *fid __attribute__((unused)),
+				     struct volume_group *vg, const struct dm_config_node *hlvn,
 				     const struct dm_config_node *vgn __attribute__((unused)),
 				     struct dm_hash_table *pv_hash __attribute__((unused)),
 				     struct dm_hash_table *lv_hash __attribute__((unused)))
 {
+	struct dm_pool *mem = vg->vgmem;
 	struct generic_logical_volume *glv;
 	struct glv_list *glvl;
 	const char *str;
@@ -813,17 +740,13 @@ bad:
 	return 0;
 }

-static int _read_historical_lvnames_interconnections(struct cmd_context *cmd,
-						 struct format_type *fmt,
-						 struct format_instance *fid __attribute__((unused)),
-						 struct dm_pool *mem,
-						 struct volume_group *vg,
-			  			 struct lvmcache_vgsummary *vgsummary,
-						 const struct dm_config_node *hlvn,
+static int _read_historical_lvnames_interconnections(struct format_instance *fid __attribute__((unused)),
+						 struct volume_group *vg, const struct dm_config_node *hlvn,
 						 const struct dm_config_node *vgn __attribute__((unused)),
 						 struct dm_hash_table *pv_hash __attribute__((unused)),
 						 struct dm_hash_table *lv_hash __attribute__((unused)))
 {
+	struct dm_pool *mem = vg->vgmem;
 	const char *historical_lv_name, *origin_name = NULL;
 	struct generic_logical_volume *glv, *origin_glv, *descendant_glv;
 	struct logical_volume *tmp_lv;
@@ -927,13 +850,8 @@ bad:
 	return 0;
 }

-static int _read_lvsegs(struct cmd_context *cmd,
-			struct format_type *fmt,
-			struct format_instance *fid,
-			struct dm_pool *mem,
-			struct volume_group *vg,
-			struct lvmcache_vgsummary *vgsummary,
-			const struct dm_config_node *lvn,
+static int _read_lvsegs(struct format_instance *fid,
+			struct volume_group *vg, const struct dm_config_node *lvn,
 			const struct dm_config_node *vgn __attribute__((unused)),
 			struct dm_hash_table *pv_hash,
 			struct dm_hash_table *lv_hash)
@@ -959,7 +877,7 @@ static int _read_lvsegs(struct cmd_context *cmd,

 	memcpy(&lv->lvid.id[0], &lv->vg->id, sizeof(lv->lvid.id[0]));

-	if (!_read_segments(cmd, fmt, fid, mem, lv, lvn, pv_hash))
+	if (!_read_segments(lv, lvn, pv_hash))
 		return_0;

 	lv->size = (uint64_t) lv->le_count * (uint64_t) vg->extent_size;
@@ -975,14 +893,14 @@ static int _read_lvsegs(struct cmd_context *cmd,

 		if (!dm_config_has_node(lvn, "major"))
 			/* If major is missing, pick default */
-			lv->major = cmd->dev_types->device_mapper_major;
+			lv->major = vg->cmd->dev_types->device_mapper_major;
 		else if (!_read_int32(lvn, "major", &lv->major)) {
 			log_warn("WARNING: Couldn't read major number for logical "
 				 "volume %s.", display_lvname(lv));
-			lv->major = cmd->dev_types->device_mapper_major;
+			lv->major = vg->cmd->dev_types->device_mapper_major;
 		}

-		if (!validate_major_minor(cmd, fmt, lv->major, lv->minor)) {
+		if (!validate_major_minor(vg->cmd, fid->fmt, lv->major, lv->minor)) {
 			log_warn("WARNING: Ignoring invalid major, minor number for "
 				 "logical volume %s.", display_lvname(lv));
 			lv->major = lv->minor = -1;
@@ -992,14 +910,9 @@ static int _read_lvsegs(struct cmd_context *cmd,
 	return 1;
 }

-static int _read_sections(struct cmd_context *cmd,
-			  const struct format_type *fmt,
-			  struct format_instance *fid,
-			  struct dm_pool *mem,
+static int _read_sections(struct format_instance *fid,
 			  const char *section, section_fn fn,
-			  struct volume_group *vg,
-			  struct lvmcache_vgsummary *vgsummary,
-			  const struct dm_config_node *vgn,
+			  struct volume_group *vg, const struct dm_config_node *vgn,
 			  struct dm_hash_table *pv_hash,
 			  struct dm_hash_table *lv_hash,
 			  int optional)
@@ -1016,19 +929,17 @@ static int _read_sections(struct cmd_context *cmd,
 	}

 	for (n = n->child; n; n = n->sib) {
-		if (!fn(cmd, (struct format_type *)fmt, fid, mem, vg, vgsummary, n, vgn, pv_hash, lv_hash))
+		if (!fn(fid, vg, n, vgn, pv_hash, lv_hash))
 			return_0;
 	}

 	return 1;
 }

-static struct volume_group *_read_vg(struct cmd_context *cmd,
-				     const struct format_type *fmt,
-				     struct format_instance *fid,
-				     const struct dm_config_tree *cft)
+static struct volume_group *_read_vg(struct format_instance *fid,
+				     const struct dm_config_tree *cft,
+				     unsigned allow_lvmetad_extensions)
 {
-	struct dm_pool *mem;
 	const struct dm_config_node *vgn;
 	const struct dm_config_value *cv;
 	const char *str, *format_str, *system_id;
@@ -1045,11 +956,9 @@ static struct volume_group *_read_vg(struct cmd_context *cmd,
 		return NULL;
 	}

-	if (!(vg = alloc_vg("read_vg", cmd, vgn->key)))
+	if (!(vg = alloc_vg("read_vg", fid->fmt->cmd, vgn->key)))
 		return_NULL;

-	mem = vg->vgmem;
-
 	/*
 	 * The pv hash memorises the pv section names -> pv
 	 * structures.
@@ -1072,13 +981,13 @@ static struct volume_group *_read_vg(struct cmd_context *cmd,

 	/* A backup file might be a backup of a different format */
 	if (dm_config_get_str(vgn, "format", &format_str) &&
-	    !(vg->original_fmt = get_format_by_name(cmd, format_str))) {
+	    !(vg->original_fmt = get_format_by_name(fid->fmt->cmd, format_str))) {
 		log_error("Unrecognised format %s for volume group %s.", format_str, vg->name);
 		goto bad;
 	}

 	if (dm_config_get_str(vgn, "lock_type", &str)) {
-		if (!(vg->lock_type = dm_pool_strdup(mem, str)))
+		if (!(vg->lock_type = dm_pool_strdup(vg->vgmem, str)))
 			goto bad;
 	}

@@ -1104,7 +1013,7 @@ static struct volume_group *_read_vg(struct cmd_context *cmd,
 	 * the lock_args before using it to access the lock manager.
 	 */
 	if (dm_config_get_str(vgn, "lock_args", &str)) {
-		if (!(vg->lock_args = dm_pool_strdup(mem, str)))
+		if (!(vg->lock_args = dm_pool_strdup(vg->vgmem, str)))
 			goto bad;
 	}

@@ -1126,7 +1035,7 @@ static struct volume_group *_read_vg(struct cmd_context *cmd,
 	}

 	if (dm_config_get_str(vgn, "system_id", &system_id)) {
-		if (!(vg->system_id = dm_pool_strdup(mem, system_id))) {
+		if (!(vg->system_id = dm_pool_strdup(vg->vgmem, system_id))) {
 			log_error("Failed to allocate memory for system_id in _read_vg.");
 			goto bad;
 		}
@@ -1171,7 +1080,7 @@ static struct volume_group *_read_vg(struct cmd_context *cmd,

 	if (dm_config_get_str(vgn, "profile", &str)) {
 		log_debug_metadata("Adding profile configuration %s for VG %s.", str, vg->name);
-		vg->profile = add_profile(cmd, str, CONFIG_PROFILE_METADATA);
+		vg->profile = add_profile(vg->cmd, str, CONFIG_PROFILE_METADATA);
 		if (!vg->profile) {
 			log_error("Failed to add configuration profile %s for VG %s", str, vg->name);
 			goto bad;
@@ -1182,7 +1091,7 @@ static struct volume_group *_read_vg(struct cmd_context *cmd,
 		vg->mda_copies = DEFAULT_VGMETADATACOPIES;
 	}

-	if (!_read_sections(cmd, fmt, fid, mem, "physical_volumes", _read_pv, vg, NULL,
+	if (!_read_sections(fid, "physical_volumes", _read_pv, vg,
 			    vgn, pv_hash, lv_hash, 0)) {
 		log_error("Couldn't find all physical volumes for volume "
 			  "group %s.", vg->name);
@@ -1191,34 +1100,34 @@ static struct volume_group *_read_vg(struct cmd_context *cmd,

 	/* Optional tags */
 	if (dm_config_get_list(vgn, "tags", &cv) &&
-	    !(_read_str_list(mem, &vg->tags, cv))) {
+	    !(_read_str_list(vg->vgmem, &vg->tags, cv))) {
 		log_error("Couldn't read tags for volume group %s.", vg->name);
 		goto bad;
 	}

-	if (!_read_sections(cmd, fmt, fid, mem, "logical_volumes", _read_lvnames, vg, NULL,
+	if (!_read_sections(fid, "logical_volumes", _read_lvnames, vg,
 			    vgn, pv_hash, lv_hash, 1)) {
 		log_error("Couldn't read all logical volume names for volume "
 			  "group %s.", vg->name);
 		goto bad;
 	}

-	if (!_read_sections(cmd, fmt, fid, mem, "historical_logical_volumes", _read_historical_lvnames, vg, NULL,
+	if (!_read_sections(fid, "historical_logical_volumes", _read_historical_lvnames, vg,
 			    vgn, pv_hash, lv_hash, 1)) {
 		log_error("Couldn't read all historical logical volumes for volume "
 			  "group %s.", vg->name);
 		goto bad;
 	}

-	if (!_read_sections(cmd, fmt, fid, mem, "logical_volumes", _read_lvsegs, vg, NULL,
+	if (!_read_sections(fid, "logical_volumes", _read_lvsegs, vg,
 			    vgn, pv_hash, lv_hash, 1)) {
 		log_error("Couldn't read all logical volumes for "
 			  "volume group %s.", vg->name);
 		goto bad;
 	}

-	if (!_read_sections(cmd, fmt, fid, mem, "historical_logical_volumes", _read_historical_lvnames_interconnections,
-			    vg, NULL, vgn, pv_hash, lv_hash, 1)) {
+	if (!_read_sections(fid, "historical_logical_volumes", _read_historical_lvnames_interconnections,
+			    vg, vgn, pv_hash, lv_hash, 1)) {
 		log_error("Couldn't read all removed logical volume interconnections "
 			  "for volume group %s.", vg->name);
 		goto bad;
@@ -1233,8 +1142,7 @@ static struct volume_group *_read_vg(struct cmd_context *cmd,
 	dm_hash_destroy(pv_hash);
 	dm_hash_destroy(lv_hash);

-	if (fid)
-		vg_set_fid(vg, fid);
+	vg_set_fid(vg, fid);

 	/*
 	 * Finished.
@@ -1327,11 +1235,6 @@ static int _read_vgsummary(const struct format_type *fmt, const struct dm_config
 		return 0;
 	}

-	if (!_read_sections(fmt->cmd, NULL, NULL, mem, "physical_volumes", _read_pvsummary, NULL, vgsummary,
-			    vgn, NULL, NULL, 0)) {
-		log_debug("Couldn't read pv summaries");
-	}
-
 	return 1;
 }

--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Joe Thornber	510a6e86a3	Merge branch '2019-09-05-add-io-manager' of git+ssh://sourceware.org/git/lvm2 into 2019-09-05-add-io-manager	2019-09-09 18:21:20 +01:00
Joe Thornber	e4693f7f8d	[io-manager] Reopen without O_DIRECT if we need to write a partial block. Still need to do a bit more testing. Also need to think more about how we guarantee that we've reopened the same device. Pass in a device_id_extractor object to push the issue up a layer?	2019-09-09 18:18:46 +01:00
David Teigland	13c702f862	io-manager: clean up block sizes	2019-09-06 14:40:39 -05:00
Joe Thornber	4b25dd7bc2	[io-manager] Drop in new io-manager files io-manager is an updated version of the bcache. This commit contains: - io-manager - io-processor: a utility that runs an action across regions of disk. using the io-manager to prefetch in correctly sized batches. - unit tests for the above (~100 total) - remove unit tests for bcache. - There's a name clash between bcache/io_engine and io_manager/io_engine. So I've renamed the bcache one to io_engine_ for now. bcache will disappear shortly.	2019-09-06 10:22:02 +01:00