Mike Snitzer 4a02b34e0c dm thin: switch to read-only mode if metadata space is exhausted ...

Switch the thin pool to read-only mode in alloc_data_block() if
dm_pool_alloc_data_block() fails because the pool's metadata space is
exhausted.

Differentiate between data and metadata space in messages about no
free space available.

This issue was noticed with the device-mapper-test-suite using:
dmtest run --suite thin-provisioning -n /exhausting_metadata_space_causes_fail_mode/

The quantity of errors logged in this case must be reduced.

before patch:

device-mapper: thin: 253:4: reached low water mark for metadata device: sending event.
device-mapper: space map metadata: unable to allocate new metadata block
device-mapper: space map common: dm_tm_shadow_block() failed
device-mapper: space map metadata: unable to allocate new metadata block
device-mapper: space map common: dm_tm_shadow_block() failed
device-mapper: space map metadata: unable to allocate new metadata block
device-mapper: space map common: dm_tm_shadow_block() failed
device-mapper: space map metadata: unable to allocate new metadata block
device-mapper: space map common: dm_tm_shadow_block() failed
device-mapper: space map metadata: unable to allocate new metadata block
device-mapper: space map common: dm_tm_shadow_block() failed
<snip ... these repeat for a _very_ long while ... >
device-mapper: space map metadata: unable to allocate new metadata block
device-mapper: thin: 253:4: commit failed: error = -28
device-mapper: thin: 253:4: switching pool to read-only mode

after patch:

device-mapper: thin: 253:4: reached low water mark for metadata device: sending event.
device-mapper: space map metadata: unable to allocate new metadata block
device-mapper: thin: 253:4: no free metadata space available.
device-mapper: thin: 253:4: switching pool to read-only mode

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Acked-by: Joe Thornber <ejt@redhat.com>
Cc: stable@vger.kernel.org

2013-12-10 16:35:04 -05:00

..

bcache

bcache: Fix a null ptr deref regression

2013-10-10 18:17:39 -07:00

persistent-data

dm space map metadata: return on failure in sm_metadata_new_block

2013-12-10 16:34:28 -05:00

bitmap.c

md: replace strict_strto*() with kstrto*()

2013-06-14 08:10:26 +10:00

bitmap.h

md/bitmap: record the space available for the bitmap in the superblock.

2012-05-22 13:55:34 +10:00

dm-bio-prison.c

dm: add cache target

2013-03-01 22:45:51 +00:00

dm-bio-prison.h

dm: add cache target

2013-03-01 22:45:51 +00:00

dm-bio-record.h

dm: preserve bi_io_vec when resubmitting bios

2009-04-02 19:55:23 +01:00

dm-bufio.c

drivers: convert shrinkers to new count/scan API

2013-09-10 18:56:32 -04:00

dm-bufio.h

dm bufio: prefetch

2012-03-28 18:41:29 +01:00

dm-cache-block-types.h

dm: add cache target

2013-03-01 22:45:51 +00:00

dm-cache-metadata.c

dm cache metadata: check the metadata version when reading the superblock

2013-11-11 11:37:49 -05:00

dm-cache-metadata.h

dm cache: add passthrough mode

2013-11-11 11:37:49 -05:00

dm-cache-policy-cleaner.c

dm cache: policy change version from string to integer set

2013-03-20 17:21:27 +00:00

dm-cache-policy-internal.h

dm cache: add remove_cblock method to policy interface

2013-11-11 11:37:50 -05:00

dm-cache-policy-mq.c

dm cache: resolve small nits and improve Documentation

2013-11-12 13:11:09 -05:00

dm-cache-policy.c

dm cache: return -EINVAL if the user specifies unknown cache policy

2013-11-09 18:20:18 -05:00

dm-cache-policy.h

dm cache: add remove_cblock method to policy interface

2013-11-11 11:37:50 -05:00

dm-cache-target.c

dm cache: resolve small nits and improve Documentation

2013-11-12 13:11:09 -05:00

dm-crypt.c

dm crypt: add TCW IV mode for old CBC TCRYPT containers

2013-11-09 18:20:20 -05:00

dm-delay.c

dm delay: fix a possible deadlock due to shared workqueue

2013-11-18 11:23:21 -05:00

dm-exception-store.c

dm: replace simple_strtoul

2012-07-27 15:07:59 +01:00

dm-exception-store.h

dm snapshot: test chunk size against both origin and snapshot

2010-08-12 04:13:51 +01:00

dm-flakey.c

dm flakey: correct ctr alloc failure mesg

2013-07-10 23:41:17 +01:00

dm-io.c

dm: add reserved_bio_based_ios module parameter

2013-09-23 10:42:24 -04:00

dm-ioctl.c

dm: allow remove to be deferred

2013-11-09 18:20:22 -05:00

dm-kcopyd.c

dm: stop using WQ_NON_REENTRANT

2013-08-23 09:02:13 -04:00

dm-linear.c

dm: rename request variables to bios

2013-03-01 22:45:47 +00:00

dm-log-userspace-base.c

Merge branch 'modsplit-Oct31_2011' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux

2011-11-06 19:44:47 -08:00

dm-log-userspace-transfer.c

connector/userns: replace netlink uses of cap_raised() with capable()

2012-05-10 23:21:39 -04:00

dm-log-userspace-transfer.h

dm log: userspace add luid to distinguish between concurrent log instances

2009-09-04 20:40:34 +01:00

dm-log.c

dm: use memweight()

2012-07-30 17:25:16 -07:00

dm-mpath.c

dm mpath: requeue I/O during pg_init

2013-11-05 11:20:34 -05:00

dm-mpath.h

dm mpath: remove is_active from struct dm_path

2008-10-10 13:36:58 +01:00

dm-path-selector.c

md: Add module.h to all files using it implicitly

2011-10-31 19:31:18 -04:00

dm-path-selector.h

dm mpath: add start_io and nr_bytes to path selectors

2009-06-22 10:12:27 +01:00

dm-queue-length.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-raid1.c

dm: stop using WQ_NON_REENTRANT

2013-08-23 09:02:13 -04:00

dm-raid.c

MD: Remember the last sync operation that was performed

2013-06-26 12:38:24 +10:00

dm-region-hash.c

dm raid1: fix crash with mirror recovery and discard

2012-07-20 14:25:03 +01:00

dm-round-robin.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-service-time.c

dm: reject trailing characters in sccanf input

2012-03-28 18:41:26 +01:00

dm-snap-persistent.c

dm snapshot: workaround for a false positive lockdep warning

2013-09-20 10:36:34 -04:00

dm-snap-transient.c

md: Add in export.h for files using EXPORT_SYMBOL

2011-10-31 19:31:19 -04:00

dm-snap.c

dm snapshot: avoid snapshot space leak on crash

2013-12-10 16:34:25 -05:00

dm-stats.c

dm stats: fix possible counter corruption on 32-bit systems

2013-09-18 14:41:06 -04:00

dm-stats.h

dm: add statistics support

2013-09-05 20:46:06 -04:00

dm-stripe.c

dm stripe: silence a couple sparse warnings

2013-09-06 11:36:01 -04:00

dm-switch.c

dm: add switch target

2013-07-10 23:41:19 +01:00

dm-sysfs.c

Driver core: Constify struct sysfs_ops in struct kobj_type

2010-03-07 17:04:49 -08:00

dm-table.c

dm table: fail dm_table_create on dm_round_up overflow

2013-12-10 16:34:27 -05:00

dm-target.c

dm: allow error target to replace bio-based and request-based targets

2013-09-05 20:46:05 -04:00

dm-thin-metadata.c

dm thin: generate event when metadata threshold passed

2013-05-10 14:37:21 +01:00

dm-thin-metadata.h

dm thin: generate event when metadata threshold passed

2013-05-10 14:37:21 +01:00

dm-thin.c

dm thin: switch to read-only mode if metadata space is exhausted

2013-12-10 16:35:04 -05:00

dm-uevent.c

md: Add in export.h for files using EXPORT_SYMBOL

2011-10-31 19:31:19 -04:00

dm-uevent.h

dm: uevent generate events

2007-10-20 02:01:26 +01:00

dm-verity.c

dm verity: use __ffs and __fls

2013-07-10 23:41:17 +01:00

dm-zero.c

dm: rename request variables to bios

2013-03-01 22:45:47 +00:00

dm.c

dm: allow remove to be deferred

2013-11-09 18:20:22 -05:00

dm.h

dm: allow remove to be deferred

2013-11-09 18:20:22 -05:00

faulty.c

block: Add bio_end_sector()

2013-03-23 14:15:29 -07:00

Kconfig

dm: fix Kconfig menu indentation

2013-11-09 18:20:22 -05:00

linear.c

block: Add bio_end_sector()

2013-03-23 14:15:29 -07:00

linear.h

md/linear: typedef removal: linear_conf_t -> struct linear_conf

2011-10-11 16:48:54 +11:00

Makefile

dm: add statistics support

2013-09-05 20:46:06 -04:00

md.c

md: avoid deadlock when dirty buffers during md_stop.

2013-08-27 16:45:00 +10:00

md.h

md: avoid deadlock when dirty buffers during md_stop.

2013-08-27 16:45:00 +10:00

multipath.c

MD: change the parameter of md thread

2012-10-11 13:34:00 +11:00

multipath.h

md/multipath: typedef removal: multipath_conf_t -> struct mpconf

2011-10-11 16:48:57 +11:00

raid0.c

md: fix buglet in RAID5 -> RAID0 conversion.

2013-06-26 12:38:19 +10:00

raid0.h

md: add proper merge_bvec handling to RAID0 and Linear.

2012-03-19 12:46:39 +11:00

raid1.c

md/raid1: fix bio handling problems in process_checks()

2013-07-18 14:18:04 +10:00

raid1.h

md/raid1: prevent merging too large request

2012-07-31 10:03:53 +10:00

raid5.c

raid5: only wakeup necessary threads

2013-09-02 10:31:29 +10:00

raid5.h

raid5: only wakeup necessary threads

2013-09-02 10:31:29 +10:00

raid10.c

md/raid10: remove use-after-free bug.

2013-07-25 16:46:53 +10:00

raid10.h

MD RAID10: Improve redundancy for 'far' and 'offset' algorithms (part 1)

2013-02-26 11:55:30 +11:00