mirror of
git://sourceware.org/git/lvm2.git
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584d1fb7d1
This provides better support for environments where udev rules are installed but udev_sync is not compiled in (however, using udev_sync is highly recommended). It also provides consistent and expected functionality even when '--noudevsync' option is used. There is still requirement for kernel >= 2.6.31 for the flags to work though (it uses DM cookies to pass the flags into the kernel and set them in udev event environment that we can read in udev rules).
1980 lines
46 KiB
C
1980 lines
46 KiB
C
/*
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* Copyright (C) 2005-2007 Red Hat, Inc. All rights reserved.
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*
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* This file is part of the device-mapper userspace tools.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "dmlib.h"
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#include "libdm-targets.h"
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#include "libdm-common.h"
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#include "kdev_t.h"
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#include "dm-ioctl.h"
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#include <stdarg.h>
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#include <sys/param.h>
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#include <sys/utsname.h>
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#define MAX_TARGET_PARAMSIZE 500000
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/* FIXME Fix interface so this is used only by LVM */
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#define UUID_PREFIX "LVM-"
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/* Supported segment types */
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enum {
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SEG_CRYPT,
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SEG_ERROR,
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SEG_LINEAR,
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SEG_MIRRORED,
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SEG_SNAPSHOT,
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SEG_SNAPSHOT_ORIGIN,
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SEG_STRIPED,
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SEG_ZERO,
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};
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/* FIXME Add crypt and multipath support */
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struct {
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unsigned type;
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const char *target;
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} dm_segtypes[] = {
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{ SEG_CRYPT, "crypt" },
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{ SEG_ERROR, "error" },
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{ SEG_LINEAR, "linear" },
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{ SEG_MIRRORED, "mirror" },
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{ SEG_SNAPSHOT, "snapshot" },
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{ SEG_SNAPSHOT_ORIGIN, "snapshot-origin" },
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{ SEG_STRIPED, "striped" },
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{ SEG_ZERO, "zero"},
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};
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/* Some segment types have a list of areas of other devices attached */
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struct seg_area {
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struct dm_list list;
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struct dm_tree_node *dev_node;
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uint64_t offset;
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};
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/* Per-segment properties */
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struct load_segment {
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struct dm_list list;
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unsigned type;
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uint64_t size;
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unsigned area_count; /* Linear + Striped + Mirrored + Crypt */
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struct dm_list areas; /* Linear + Striped + Mirrored + Crypt */
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uint32_t stripe_size; /* Striped */
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int persistent; /* Snapshot */
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uint32_t chunk_size; /* Snapshot */
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struct dm_tree_node *cow; /* Snapshot */
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struct dm_tree_node *origin; /* Snapshot + Snapshot origin */
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struct dm_tree_node *log; /* Mirror */
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uint32_t region_size; /* Mirror */
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unsigned clustered; /* Mirror */
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unsigned mirror_area_count; /* Mirror */
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uint32_t flags; /* Mirror log */
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char *uuid; /* Clustered mirror log */
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const char *cipher; /* Crypt */
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const char *chainmode; /* Crypt */
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const char *iv; /* Crypt */
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uint64_t iv_offset; /* Crypt */
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const char *key; /* Crypt */
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};
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/* Per-device properties */
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struct load_properties {
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int read_only;
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uint32_t major;
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uint32_t minor;
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uint32_t read_ahead;
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uint32_t read_ahead_flags;
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unsigned segment_count;
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unsigned size_changed;
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struct dm_list segs;
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const char *new_name;
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};
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/* Two of these used to join two nodes with uses and used_by. */
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struct dm_tree_link {
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struct dm_list list;
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struct dm_tree_node *node;
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};
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struct dm_tree_node {
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struct dm_tree *dtree;
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const char *name;
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const char *uuid;
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struct dm_info info;
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struct dm_list uses; /* Nodes this node uses */
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struct dm_list used_by; /* Nodes that use this node */
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int activation_priority; /* 0 gets activated first */
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uint16_t udev_flags; /* Udev control flags */
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void *context; /* External supplied context */
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struct load_properties props; /* For creation/table (re)load */
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};
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struct dm_tree {
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struct dm_pool *mem;
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struct dm_hash_table *devs;
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struct dm_hash_table *uuids;
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struct dm_tree_node root;
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int skip_lockfs; /* 1 skips lockfs (for non-snapshots) */
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int no_flush; /* 1 sets noflush (mirrors/multipath) */
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uint32_t cookie;
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};
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struct dm_tree *dm_tree_create(void)
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{
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struct dm_tree *dtree;
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if (!(dtree = dm_malloc(sizeof(*dtree)))) {
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log_error("dm_tree_create malloc failed");
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return NULL;
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}
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memset(dtree, 0, sizeof(*dtree));
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dtree->root.dtree = dtree;
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dm_list_init(&dtree->root.uses);
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dm_list_init(&dtree->root.used_by);
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dtree->skip_lockfs = 0;
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dtree->no_flush = 0;
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if (!(dtree->mem = dm_pool_create("dtree", 1024))) {
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log_error("dtree pool creation failed");
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dm_free(dtree);
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return NULL;
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}
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if (!(dtree->devs = dm_hash_create(8))) {
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log_error("dtree hash creation failed");
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dm_pool_destroy(dtree->mem);
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dm_free(dtree);
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return NULL;
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}
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if (!(dtree->uuids = dm_hash_create(32))) {
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log_error("dtree uuid hash creation failed");
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dm_hash_destroy(dtree->devs);
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dm_pool_destroy(dtree->mem);
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dm_free(dtree);
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return NULL;
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}
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return dtree;
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}
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void dm_tree_free(struct dm_tree *dtree)
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{
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if (!dtree)
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return;
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dm_hash_destroy(dtree->uuids);
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dm_hash_destroy(dtree->devs);
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dm_pool_destroy(dtree->mem);
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dm_free(dtree);
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}
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static int _nodes_are_linked(struct dm_tree_node *parent,
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struct dm_tree_node *child)
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{
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struct dm_tree_link *dlink;
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dm_list_iterate_items(dlink, &parent->uses)
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if (dlink->node == child)
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return 1;
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return 0;
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}
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static int _link(struct dm_list *list, struct dm_tree_node *node)
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{
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struct dm_tree_link *dlink;
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if (!(dlink = dm_pool_alloc(node->dtree->mem, sizeof(*dlink)))) {
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log_error("dtree link allocation failed");
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return 0;
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}
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dlink->node = node;
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dm_list_add(list, &dlink->list);
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return 1;
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}
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static int _link_nodes(struct dm_tree_node *parent,
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struct dm_tree_node *child)
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{
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if (_nodes_are_linked(parent, child))
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return 1;
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if (!_link(&parent->uses, child))
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return 0;
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if (!_link(&child->used_by, parent))
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return 0;
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return 1;
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}
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static void _unlink(struct dm_list *list, struct dm_tree_node *node)
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{
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struct dm_tree_link *dlink;
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dm_list_iterate_items(dlink, list)
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if (dlink->node == node) {
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dm_list_del(&dlink->list);
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break;
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}
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}
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static void _unlink_nodes(struct dm_tree_node *parent,
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struct dm_tree_node *child)
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{
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if (!_nodes_are_linked(parent, child))
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return;
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_unlink(&parent->uses, child);
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_unlink(&child->used_by, parent);
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}
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static int _add_to_toplevel(struct dm_tree_node *node)
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{
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return _link_nodes(&node->dtree->root, node);
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}
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static void _remove_from_toplevel(struct dm_tree_node *node)
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{
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return _unlink_nodes(&node->dtree->root, node);
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}
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static int _add_to_bottomlevel(struct dm_tree_node *node)
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{
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return _link_nodes(node, &node->dtree->root);
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}
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static void _remove_from_bottomlevel(struct dm_tree_node *node)
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{
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return _unlink_nodes(node, &node->dtree->root);
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}
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static int _link_tree_nodes(struct dm_tree_node *parent, struct dm_tree_node *child)
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{
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/* Don't link to root node if child already has a parent */
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if ((parent == &parent->dtree->root)) {
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if (dm_tree_node_num_children(child, 1))
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return 1;
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} else
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_remove_from_toplevel(child);
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if ((child == &child->dtree->root)) {
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if (dm_tree_node_num_children(parent, 0))
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return 1;
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} else
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_remove_from_bottomlevel(parent);
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return _link_nodes(parent, child);
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}
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static struct dm_tree_node *_create_dm_tree_node(struct dm_tree *dtree,
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const char *name,
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const char *uuid,
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struct dm_info *info,
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void *context,
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uint16_t udev_flags)
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{
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struct dm_tree_node *node;
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uint64_t dev;
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if (!(node = dm_pool_zalloc(dtree->mem, sizeof(*node)))) {
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log_error("_create_dm_tree_node alloc failed");
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return NULL;
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}
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node->dtree = dtree;
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node->name = name;
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node->uuid = uuid;
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node->info = *info;
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node->context = context;
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node->udev_flags = udev_flags;
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node->activation_priority = 0;
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dm_list_init(&node->uses);
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dm_list_init(&node->used_by);
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dm_list_init(&node->props.segs);
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dev = MKDEV(info->major, info->minor);
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if (!dm_hash_insert_binary(dtree->devs, (const char *) &dev,
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sizeof(dev), node)) {
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log_error("dtree node hash insertion failed");
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dm_pool_free(dtree->mem, node);
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return NULL;
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}
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if (uuid && *uuid &&
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!dm_hash_insert(dtree->uuids, uuid, node)) {
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log_error("dtree uuid hash insertion failed");
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dm_hash_remove_binary(dtree->devs, (const char *) &dev,
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sizeof(dev));
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dm_pool_free(dtree->mem, node);
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return NULL;
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}
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return node;
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}
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static struct dm_tree_node *_find_dm_tree_node(struct dm_tree *dtree,
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uint32_t major, uint32_t minor)
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{
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uint64_t dev = MKDEV(major, minor);
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return dm_hash_lookup_binary(dtree->devs, (const char *) &dev,
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sizeof(dev));
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}
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static struct dm_tree_node *_find_dm_tree_node_by_uuid(struct dm_tree *dtree,
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const char *uuid)
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{
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struct dm_tree_node *node;
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if ((node = dm_hash_lookup(dtree->uuids, uuid)))
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return node;
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if (strncmp(uuid, UUID_PREFIX, sizeof(UUID_PREFIX) - 1))
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return NULL;
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return dm_hash_lookup(dtree->uuids, uuid + sizeof(UUID_PREFIX) - 1);
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}
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static int _deps(struct dm_task **dmt, struct dm_pool *mem, uint32_t major, uint32_t minor,
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const char **name, const char **uuid,
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struct dm_info *info, struct dm_deps **deps)
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{
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memset(info, 0, sizeof(*info));
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if (!dm_is_dm_major(major)) {
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*name = "";
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*uuid = "";
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*deps = NULL;
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info->major = major;
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info->minor = minor;
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info->exists = 0;
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info->live_table = 0;
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info->inactive_table = 0;
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info->read_only = 0;
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return 1;
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}
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if (!(*dmt = dm_task_create(DM_DEVICE_DEPS))) {
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log_error("deps dm_task creation failed");
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return 0;
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}
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if (!dm_task_set_major(*dmt, major)) {
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log_error("_deps: failed to set major for (%" PRIu32 ":%" PRIu32 ")",
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major, minor);
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goto failed;
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}
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if (!dm_task_set_minor(*dmt, minor)) {
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log_error("_deps: failed to set minor for (%" PRIu32 ":%" PRIu32 ")",
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major, minor);
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goto failed;
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}
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if (!dm_task_run(*dmt)) {
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log_error("_deps: task run failed for (%" PRIu32 ":%" PRIu32 ")",
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major, minor);
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goto failed;
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}
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if (!dm_task_get_info(*dmt, info)) {
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log_error("_deps: failed to get info for (%" PRIu32 ":%" PRIu32 ")",
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major, minor);
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goto failed;
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}
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if (!info->exists) {
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*name = "";
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*uuid = "";
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*deps = NULL;
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} else {
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if (info->major != major) {
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log_error("Inconsistent dtree major number: %u != %u",
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major, info->major);
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goto failed;
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}
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if (info->minor != minor) {
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log_error("Inconsistent dtree minor number: %u != %u",
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minor, info->minor);
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goto failed;
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}
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if (!(*name = dm_pool_strdup(mem, dm_task_get_name(*dmt)))) {
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log_error("name pool_strdup failed");
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goto failed;
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}
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if (!(*uuid = dm_pool_strdup(mem, dm_task_get_uuid(*dmt)))) {
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log_error("uuid pool_strdup failed");
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goto failed;
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}
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*deps = dm_task_get_deps(*dmt);
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}
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return 1;
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failed:
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dm_task_destroy(*dmt);
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return 0;
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}
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static struct dm_tree_node *_add_dev(struct dm_tree *dtree,
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struct dm_tree_node *parent,
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uint32_t major, uint32_t minor)
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{
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struct dm_task *dmt = NULL;
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struct dm_info info;
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struct dm_deps *deps = NULL;
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const char *name = NULL;
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const char *uuid = NULL;
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struct dm_tree_node *node = NULL;
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uint32_t i;
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int new = 0;
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/* Already in tree? */
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if (!(node = _find_dm_tree_node(dtree, major, minor))) {
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if (!_deps(&dmt, dtree->mem, major, minor, &name, &uuid, &info, &deps))
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return_NULL;
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if (!(node = _create_dm_tree_node(dtree, name, uuid, &info,
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NULL, 0)))
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goto_out;
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new = 1;
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}
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if (!_link_tree_nodes(parent, node)) {
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node = NULL;
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goto_out;
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}
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/* If node was already in tree, no need to recurse. */
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if (!new)
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goto out;
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/* Can't recurse if not a mapped device or there are no dependencies */
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if (!node->info.exists || !deps->count) {
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if (!_add_to_bottomlevel(node)) {
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stack;
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node = NULL;
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}
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goto out;
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}
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/* Add dependencies to tree */
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for (i = 0; i < deps->count; i++)
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if (!_add_dev(dtree, node, MAJOR(deps->device[i]),
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MINOR(deps->device[i]))) {
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node = NULL;
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goto_out;
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}
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out:
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if (dmt)
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dm_task_destroy(dmt);
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return node;
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}
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static int _node_clear_table(struct dm_tree_node *dnode)
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{
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struct dm_task *dmt;
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struct dm_info *info;
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const char *name;
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int r;
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if (!(info = &dnode->info)) {
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log_error("_node_clear_table failed: missing info");
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return 0;
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}
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if (!(name = dm_tree_node_get_name(dnode))) {
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log_error("_node_clear_table failed: missing name");
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return 0;
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}
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/* Is there a table? */
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if (!info->exists || !info->inactive_table)
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return 1;
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log_verbose("Clearing inactive table %s (%" PRIu32 ":%" PRIu32 ")",
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name, info->major, info->minor);
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if (!(dmt = dm_task_create(DM_DEVICE_CLEAR))) {
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dm_task_destroy(dmt);
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log_error("Table clear dm_task creation failed for %s", name);
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return 0;
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}
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if (!dm_task_set_major(dmt, info->major) ||
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!dm_task_set_minor(dmt, info->minor)) {
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log_error("Failed to set device number for %s table clear", name);
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dm_task_destroy(dmt);
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return 0;
|
|
}
|
|
|
|
r = dm_task_run(dmt);
|
|
|
|
if (!dm_task_get_info(dmt, info)) {
|
|
log_error("_node_clear_table failed: info missing after running task for %s", name);
|
|
r = 0;
|
|
}
|
|
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
struct dm_tree_node *dm_tree_add_new_dev(struct dm_tree *dtree,
|
|
const char *name,
|
|
const char *uuid,
|
|
uint32_t major, uint32_t minor,
|
|
int read_only,
|
|
int clear_inactive,
|
|
void *context)
|
|
{
|
|
struct dm_tree_node *dnode;
|
|
struct dm_info info;
|
|
const char *name2;
|
|
const char *uuid2;
|
|
|
|
/* Do we need to add node to tree? */
|
|
if (!(dnode = dm_tree_find_node_by_uuid(dtree, uuid))) {
|
|
if (!(name2 = dm_pool_strdup(dtree->mem, name))) {
|
|
log_error("name pool_strdup failed");
|
|
return NULL;
|
|
}
|
|
if (!(uuid2 = dm_pool_strdup(dtree->mem, uuid))) {
|
|
log_error("uuid pool_strdup failed");
|
|
return NULL;
|
|
}
|
|
|
|
info.major = 0;
|
|
info.minor = 0;
|
|
info.exists = 0;
|
|
info.live_table = 0;
|
|
info.inactive_table = 0;
|
|
info.read_only = 0;
|
|
|
|
if (!(dnode = _create_dm_tree_node(dtree, name2, uuid2, &info,
|
|
context, 0)))
|
|
return_NULL;
|
|
|
|
/* Attach to root node until a table is supplied */
|
|
if (!_add_to_toplevel(dnode) || !_add_to_bottomlevel(dnode))
|
|
return_NULL;
|
|
|
|
dnode->props.major = major;
|
|
dnode->props.minor = minor;
|
|
dnode->props.new_name = NULL;
|
|
dnode->props.size_changed = 0;
|
|
} else if (strcmp(name, dnode->name)) {
|
|
/* Do we need to rename node? */
|
|
if (!(dnode->props.new_name = dm_pool_strdup(dtree->mem, name))) {
|
|
log_error("name pool_strdup failed");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
dnode->props.read_only = read_only ? 1 : 0;
|
|
dnode->props.read_ahead = DM_READ_AHEAD_AUTO;
|
|
dnode->props.read_ahead_flags = 0;
|
|
|
|
if (clear_inactive && !_node_clear_table(dnode))
|
|
return_NULL;
|
|
|
|
dnode->context = context;
|
|
dnode->udev_flags = 0;
|
|
|
|
return dnode;
|
|
}
|
|
|
|
struct dm_tree_node *dm_tree_add_new_dev_with_udev_flags(struct dm_tree *dtree,
|
|
const char *name,
|
|
const char *uuid,
|
|
uint32_t major,
|
|
uint32_t minor,
|
|
int read_only,
|
|
int clear_inactive,
|
|
void *context,
|
|
uint16_t udev_flags)
|
|
{
|
|
struct dm_tree_node *node;
|
|
|
|
if ((node = dm_tree_add_new_dev(dtree, name, uuid, major, minor, read_only,
|
|
clear_inactive, context)))
|
|
node->udev_flags = udev_flags;
|
|
|
|
return node;
|
|
}
|
|
|
|
|
|
void dm_tree_node_set_read_ahead(struct dm_tree_node *dnode,
|
|
uint32_t read_ahead,
|
|
uint32_t read_ahead_flags)
|
|
{
|
|
dnode->props.read_ahead = read_ahead;
|
|
dnode->props.read_ahead_flags = read_ahead_flags;
|
|
}
|
|
|
|
int dm_tree_add_dev(struct dm_tree *dtree, uint32_t major, uint32_t minor)
|
|
{
|
|
return _add_dev(dtree, &dtree->root, major, minor) ? 1 : 0;
|
|
}
|
|
|
|
const char *dm_tree_node_get_name(struct dm_tree_node *node)
|
|
{
|
|
return node->info.exists ? node->name : "";
|
|
}
|
|
|
|
const char *dm_tree_node_get_uuid(struct dm_tree_node *node)
|
|
{
|
|
return node->info.exists ? node->uuid : "";
|
|
}
|
|
|
|
const struct dm_info *dm_tree_node_get_info(struct dm_tree_node *node)
|
|
{
|
|
return &node->info;
|
|
}
|
|
|
|
void *dm_tree_node_get_context(struct dm_tree_node *node)
|
|
{
|
|
return node->context;
|
|
}
|
|
|
|
int dm_tree_node_size_changed(struct dm_tree_node *dnode)
|
|
{
|
|
return dnode->props.size_changed;
|
|
}
|
|
|
|
int dm_tree_node_num_children(struct dm_tree_node *node, uint32_t inverted)
|
|
{
|
|
if (inverted) {
|
|
if (_nodes_are_linked(&node->dtree->root, node))
|
|
return 0;
|
|
return dm_list_size(&node->used_by);
|
|
}
|
|
|
|
if (_nodes_are_linked(node, &node->dtree->root))
|
|
return 0;
|
|
|
|
return dm_list_size(&node->uses);
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if no prefix supplied
|
|
*/
|
|
static int _uuid_prefix_matches(const char *uuid, const char *uuid_prefix, size_t uuid_prefix_len)
|
|
{
|
|
if (!uuid_prefix)
|
|
return 1;
|
|
|
|
if (!strncmp(uuid, uuid_prefix, uuid_prefix_len))
|
|
return 1;
|
|
|
|
/* Handle transition: active device uuids might be missing the prefix */
|
|
if (uuid_prefix_len <= 4)
|
|
return 0;
|
|
|
|
if (!strncmp(uuid, UUID_PREFIX, sizeof(UUID_PREFIX) - 1))
|
|
return 0;
|
|
|
|
if (strncmp(uuid_prefix, UUID_PREFIX, sizeof(UUID_PREFIX) - 1))
|
|
return 0;
|
|
|
|
if (!strncmp(uuid, uuid_prefix + sizeof(UUID_PREFIX) - 1, uuid_prefix_len - (sizeof(UUID_PREFIX) - 1)))
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if no children.
|
|
*/
|
|
static int _children_suspended(struct dm_tree_node *node,
|
|
uint32_t inverted,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
struct dm_list *list;
|
|
struct dm_tree_link *dlink;
|
|
const struct dm_info *dinfo;
|
|
const char *uuid;
|
|
|
|
if (inverted) {
|
|
if (_nodes_are_linked(&node->dtree->root, node))
|
|
return 1;
|
|
list = &node->used_by;
|
|
} else {
|
|
if (_nodes_are_linked(node, &node->dtree->root))
|
|
return 1;
|
|
list = &node->uses;
|
|
}
|
|
|
|
dm_list_iterate_items(dlink, list) {
|
|
if (!(uuid = dm_tree_node_get_uuid(dlink->node))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (!(dinfo = dm_tree_node_get_info(dlink->node))) {
|
|
stack; /* FIXME Is this normal? */
|
|
return 0;
|
|
}
|
|
|
|
if (!dinfo->suspended)
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Set major and minor to zero for root of tree.
|
|
*/
|
|
struct dm_tree_node *dm_tree_find_node(struct dm_tree *dtree,
|
|
uint32_t major,
|
|
uint32_t minor)
|
|
{
|
|
if (!major && !minor)
|
|
return &dtree->root;
|
|
|
|
return _find_dm_tree_node(dtree, major, minor);
|
|
}
|
|
|
|
/*
|
|
* Set uuid to NULL for root of tree.
|
|
*/
|
|
struct dm_tree_node *dm_tree_find_node_by_uuid(struct dm_tree *dtree,
|
|
const char *uuid)
|
|
{
|
|
if (!uuid || !*uuid)
|
|
return &dtree->root;
|
|
|
|
return _find_dm_tree_node_by_uuid(dtree, uuid);
|
|
}
|
|
|
|
/*
|
|
* First time set *handle to NULL.
|
|
* Set inverted to invert the tree.
|
|
*/
|
|
struct dm_tree_node *dm_tree_next_child(void **handle,
|
|
struct dm_tree_node *parent,
|
|
uint32_t inverted)
|
|
{
|
|
struct dm_list **dlink = (struct dm_list **) handle;
|
|
struct dm_list *use_list;
|
|
|
|
if (inverted)
|
|
use_list = &parent->used_by;
|
|
else
|
|
use_list = &parent->uses;
|
|
|
|
if (!*dlink)
|
|
*dlink = dm_list_first(use_list);
|
|
else
|
|
*dlink = dm_list_next(use_list, *dlink);
|
|
|
|
return (*dlink) ? dm_list_item(*dlink, struct dm_tree_link)->node : NULL;
|
|
}
|
|
|
|
/*
|
|
* Deactivate a device with its dependencies if the uuid prefix matches.
|
|
*/
|
|
static int _info_by_dev(uint32_t major, uint32_t minor, int with_open_count,
|
|
struct dm_info *info)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r;
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_INFO))) {
|
|
log_error("_info_by_dev: dm_task creation failed");
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
|
|
log_error("_info_by_dev: Failed to set device number");
|
|
dm_task_destroy(dmt);
|
|
return 0;
|
|
}
|
|
|
|
if (!with_open_count && !dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if ((r = dm_task_run(dmt)))
|
|
r = dm_task_get_info(dmt, info);
|
|
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int _deactivate_node(const char *name, uint32_t major, uint32_t minor,
|
|
uint32_t *cookie, uint16_t udev_flags)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r = 0;
|
|
|
|
log_verbose("Removing %s (%" PRIu32 ":%" PRIu32 ")", name, major, minor);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_REMOVE))) {
|
|
log_error("Deactivation dm_task creation failed for %s", name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
|
|
log_error("Failed to set device number for %s deactivation", name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if (!dm_task_set_cookie(dmt, cookie, udev_flags))
|
|
goto out;
|
|
|
|
r = dm_task_run(dmt);
|
|
|
|
/* FIXME Until kernel returns actual name so dm-ioctl.c can handle it */
|
|
rm_dev_node(name, dmt->cookie_set);
|
|
|
|
/* FIXME Remove node from tree or mark invalid? */
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int _rename_node(const char *old_name, const char *new_name, uint32_t major,
|
|
uint32_t minor, uint32_t *cookie, uint16_t udev_flags)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r = 0;
|
|
|
|
log_verbose("Renaming %s (%" PRIu32 ":%" PRIu32 ") to %s", old_name, major, minor, new_name);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_RENAME))) {
|
|
log_error("Rename dm_task creation failed for %s", old_name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_name(dmt, old_name)) {
|
|
log_error("Failed to set name for %s rename.", old_name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_set_newname(dmt, new_name))
|
|
goto_out;
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if (!dm_task_set_cookie(dmt, cookie, udev_flags))
|
|
goto out;
|
|
|
|
r = dm_task_run(dmt);
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
/* FIXME Merge with _suspend_node? */
|
|
static int _resume_node(const char *name, uint32_t major, uint32_t minor,
|
|
uint32_t read_ahead, uint32_t read_ahead_flags,
|
|
struct dm_info *newinfo, uint32_t *cookie,
|
|
uint16_t udev_flags)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r = 0;
|
|
|
|
log_verbose("Resuming %s (%" PRIu32 ":%" PRIu32 ")", name, major, minor);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_RESUME))) {
|
|
log_error("Suspend dm_task creation failed for %s", name);
|
|
return 0;
|
|
}
|
|
|
|
/* FIXME Kernel should fill in name on return instead */
|
|
if (!dm_task_set_name(dmt, name)) {
|
|
log_error("Failed to set readahead device name for %s", name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
|
|
log_error("Failed to set device number for %s resumption.", name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if (!dm_task_set_read_ahead(dmt, read_ahead, read_ahead_flags))
|
|
log_error("Failed to set read ahead");
|
|
|
|
if (!dm_task_set_cookie(dmt, cookie, udev_flags))
|
|
goto out;
|
|
|
|
if ((r = dm_task_run(dmt)))
|
|
r = dm_task_get_info(dmt, newinfo);
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
static int _suspend_node(const char *name, uint32_t major, uint32_t minor,
|
|
int skip_lockfs, int no_flush, struct dm_info *newinfo)
|
|
{
|
|
struct dm_task *dmt;
|
|
int r;
|
|
|
|
log_verbose("Suspending %s (%" PRIu32 ":%" PRIu32 ")%s%s",
|
|
name, major, minor,
|
|
skip_lockfs ? "" : " with filesystem sync",
|
|
no_flush ? "" : " with device flush");
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_SUSPEND))) {
|
|
log_error("Suspend dm_task creation failed for %s", name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, major) || !dm_task_set_minor(dmt, minor)) {
|
|
log_error("Failed to set device number for %s suspension.", name);
|
|
dm_task_destroy(dmt);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if (skip_lockfs && !dm_task_skip_lockfs(dmt))
|
|
log_error("Failed to set skip_lockfs flag.");
|
|
|
|
if (no_flush && !dm_task_no_flush(dmt))
|
|
log_error("Failed to set no_flush flag.");
|
|
|
|
if ((r = dm_task_run(dmt)))
|
|
r = dm_task_get_info(dmt, newinfo);
|
|
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
int dm_tree_deactivate_children(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child = dnode;
|
|
struct dm_info info;
|
|
const struct dm_info *dinfo;
|
|
const char *name;
|
|
const char *uuid;
|
|
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(dinfo = dm_tree_node_get_info(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!(name = dm_tree_node_get_name(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
/* Refresh open_count */
|
|
if (!_info_by_dev(dinfo->major, dinfo->minor, 1, &info) ||
|
|
!info.exists || info.open_count)
|
|
continue;
|
|
|
|
if (!_deactivate_node(name, info.major, info.minor,
|
|
&child->dtree->cookie, child->udev_flags)) {
|
|
log_error("Unable to deactivate %s (%" PRIu32
|
|
":%" PRIu32 ")", name, info.major,
|
|
info.minor);
|
|
continue;
|
|
}
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_deactivate_children(child, uuid_prefix, uuid_prefix_len);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
void dm_tree_skip_lockfs(struct dm_tree_node *dnode)
|
|
{
|
|
dnode->dtree->skip_lockfs = 1;
|
|
}
|
|
|
|
void dm_tree_use_no_flush_suspend(struct dm_tree_node *dnode)
|
|
{
|
|
dnode->dtree->no_flush = 1;
|
|
}
|
|
|
|
int dm_tree_suspend_children(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child = dnode;
|
|
struct dm_info info, newinfo;
|
|
const struct dm_info *dinfo;
|
|
const char *name;
|
|
const char *uuid;
|
|
|
|
/* Suspend nodes at this level of the tree */
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(dinfo = dm_tree_node_get_info(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!(name = dm_tree_node_get_name(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
/* Ensure immediate parents are already suspended */
|
|
if (!_children_suspended(child, 1, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (!_info_by_dev(dinfo->major, dinfo->minor, 0, &info) ||
|
|
!info.exists || info.suspended)
|
|
continue;
|
|
|
|
if (!_suspend_node(name, info.major, info.minor,
|
|
child->dtree->skip_lockfs,
|
|
child->dtree->no_flush, &newinfo)) {
|
|
log_error("Unable to suspend %s (%" PRIu32
|
|
":%" PRIu32 ")", name, info.major,
|
|
info.minor);
|
|
continue;
|
|
}
|
|
|
|
/* Update cached info */
|
|
child->info = newinfo;
|
|
}
|
|
|
|
/* Then suspend any child nodes */
|
|
handle = NULL;
|
|
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_suspend_children(child, uuid_prefix, uuid_prefix_len);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_activate_children(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child = dnode;
|
|
struct dm_info newinfo;
|
|
const char *name;
|
|
const char *uuid;
|
|
int priority;
|
|
|
|
/* Activate children first */
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_activate_children(child, uuid_prefix, uuid_prefix_len);
|
|
}
|
|
|
|
handle = NULL;
|
|
|
|
for (priority = 0; priority < 2; priority++) {
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
if (!_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (priority != child->activation_priority)
|
|
continue;
|
|
|
|
if (!(name = dm_tree_node_get_name(child))) {
|
|
stack;
|
|
continue;
|
|
}
|
|
|
|
/* Rename? */
|
|
if (child->props.new_name) {
|
|
if (!_rename_node(name, child->props.new_name, child->info.major,
|
|
child->info.minor, &child->dtree->cookie,
|
|
child->udev_flags)) {
|
|
log_error("Failed to rename %s (%" PRIu32
|
|
":%" PRIu32 ") to %s", name, child->info.major,
|
|
child->info.minor, child->props.new_name);
|
|
return 0;
|
|
}
|
|
child->name = child->props.new_name;
|
|
child->props.new_name = NULL;
|
|
}
|
|
|
|
if (!child->info.inactive_table && !child->info.suspended)
|
|
continue;
|
|
|
|
if (!_resume_node(child->name, child->info.major, child->info.minor,
|
|
child->props.read_ahead, child->props.read_ahead_flags,
|
|
&newinfo, &child->dtree->cookie, child->udev_flags)) {
|
|
log_error("Unable to resume %s (%" PRIu32
|
|
":%" PRIu32 ")", child->name, child->info.major,
|
|
child->info.minor);
|
|
continue;
|
|
}
|
|
|
|
/* Update cached info */
|
|
child->info = newinfo;
|
|
}
|
|
}
|
|
|
|
handle = NULL;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _create_node(struct dm_tree_node *dnode)
|
|
{
|
|
int r = 0;
|
|
struct dm_task *dmt;
|
|
|
|
log_verbose("Creating %s", dnode->name);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_CREATE))) {
|
|
log_error("Create dm_task creation failed for %s", dnode->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_name(dmt, dnode->name)) {
|
|
log_error("Failed to set device name for %s", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_set_uuid(dmt, dnode->uuid)) {
|
|
log_error("Failed to set uuid for %s", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (dnode->props.major &&
|
|
(!dm_task_set_major(dmt, dnode->props.major) ||
|
|
!dm_task_set_minor(dmt, dnode->props.minor))) {
|
|
log_error("Failed to set device number for %s creation.", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (dnode->props.read_only && !dm_task_set_ro(dmt)) {
|
|
log_error("Failed to set read only flag for %s", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
if ((r = dm_task_run(dmt)))
|
|
r = dm_task_get_info(dmt, &dnode->info);
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
|
|
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)) {
|
|
log_error("Failed to format %s device number for %s as dm "
|
|
"target (%u,%u)",
|
|
node->name, node->uuid, node->info.major, node->info.minor);
|
|
return 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* simplify string emiting code */
|
|
#define EMIT_PARAMS(p, str...)\
|
|
do {\
|
|
int w;\
|
|
if ((w = dm_snprintf(params + p, paramsize - (size_t) p, str)) < 0) {\
|
|
stack; /* Out of space */\
|
|
return -1;\
|
|
}\
|
|
p += w;\
|
|
} while (0)
|
|
|
|
/*
|
|
* _emit_areas_line
|
|
*
|
|
* Returns: 1 on success, 0 on failure
|
|
*/
|
|
static int _emit_areas_line(struct dm_task *dmt __attribute((unused)),
|
|
struct load_segment *seg, char *params,
|
|
size_t paramsize, int *pos)
|
|
{
|
|
struct seg_area *area;
|
|
char devbuf[DM_FORMAT_DEV_BUFSIZE];
|
|
unsigned first_time = 1;
|
|
|
|
dm_list_iterate_items(area, &seg->areas) {
|
|
if (!_build_dev_string(devbuf, sizeof(devbuf), area->dev_node))
|
|
return_0;
|
|
|
|
EMIT_PARAMS(*pos, "%s%s %" PRIu64, first_time ? "" : " ",
|
|
devbuf, area->offset);
|
|
|
|
first_time = 0;
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Returns: 1 on success, 0 on failure
|
|
*/
|
|
static int _mirror_emit_segment_line(struct dm_task *dmt, uint32_t major,
|
|
uint32_t minor, struct load_segment *seg,
|
|
uint64_t *seg_start, char *params,
|
|
size_t paramsize)
|
|
{
|
|
int r;
|
|
int block_on_error = 0;
|
|
int handle_errors = 0;
|
|
int dm_log_userspace = 0;
|
|
struct utsname uts;
|
|
unsigned log_parm_count;
|
|
int pos = 0;
|
|
char logbuf[DM_FORMAT_DEV_BUFSIZE];
|
|
const char *logtype;
|
|
|
|
r = uname(&uts);
|
|
if (r)
|
|
return_0;
|
|
|
|
if ((seg->flags & DM_BLOCK_ON_ERROR)) {
|
|
/*
|
|
* Originally, block_on_error was an argument to the log
|
|
* portion of the mirror CTR table. It was renamed to
|
|
* "handle_errors" and now resides in the 'features'
|
|
* section of the mirror CTR table (i.e. at the end).
|
|
*
|
|
* We can identify whether to use "block_on_error" or
|
|
* "handle_errors" by the dm-mirror module's version
|
|
* number (>= 1.12) or by the kernel version (>= 2.6.22).
|
|
*/
|
|
if (strncmp(uts.release, "2.6.22", 6) >= 0)
|
|
handle_errors = 1;
|
|
else
|
|
block_on_error = 1;
|
|
}
|
|
|
|
if (seg->clustered) {
|
|
/* Cluster mirrors require a UUID */
|
|
if (!seg->uuid)
|
|
return_0;
|
|
|
|
/*
|
|
* Cluster mirrors used to have their own log
|
|
* types. Now they are accessed through the
|
|
* userspace log type.
|
|
*
|
|
* The dm-log-userspace module was added to the
|
|
* 2.6.31 kernel.
|
|
*/
|
|
if (strncmp(uts.release, "2.6.31", 6) >= 0)
|
|
dm_log_userspace = 1;
|
|
}
|
|
|
|
/* Region size */
|
|
log_parm_count = 1;
|
|
|
|
/* [no]sync, block_on_error etc. */
|
|
log_parm_count += hweight32(seg->flags);
|
|
|
|
/* "handle_errors" is a feature arg now */
|
|
if (handle_errors)
|
|
log_parm_count--;
|
|
|
|
/* DM_CORELOG does not count in the param list */
|
|
if (seg->flags & DM_CORELOG)
|
|
log_parm_count--;
|
|
|
|
if (seg->clustered) {
|
|
log_parm_count++; /* For UUID */
|
|
|
|
if (!dm_log_userspace)
|
|
EMIT_PARAMS(pos, "clustered-");
|
|
}
|
|
|
|
if (!seg->log)
|
|
logtype = "core";
|
|
else {
|
|
logtype = "disk";
|
|
log_parm_count++;
|
|
if (!_build_dev_string(logbuf, sizeof(logbuf), seg->log))
|
|
return_0;
|
|
}
|
|
|
|
if (dm_log_userspace)
|
|
EMIT_PARAMS(pos, "userspace %u %s clustered-%s",
|
|
log_parm_count, seg->uuid, logtype);
|
|
else
|
|
EMIT_PARAMS(pos, "%s %u", logtype, log_parm_count);
|
|
|
|
if (seg->log)
|
|
EMIT_PARAMS(pos, " %s", logbuf);
|
|
|
|
EMIT_PARAMS(pos, " %u", seg->region_size);
|
|
|
|
if (seg->clustered && !dm_log_userspace)
|
|
EMIT_PARAMS(pos, " %s", seg->uuid);
|
|
|
|
if ((seg->flags & DM_NOSYNC))
|
|
EMIT_PARAMS(pos, " nosync");
|
|
else if ((seg->flags & DM_FORCESYNC))
|
|
EMIT_PARAMS(pos, " sync");
|
|
|
|
if (block_on_error)
|
|
EMIT_PARAMS(pos, " block_on_error");
|
|
|
|
EMIT_PARAMS(pos, " %u ", seg->mirror_area_count);
|
|
|
|
if ((r = _emit_areas_line(dmt, seg, params, paramsize, &pos)) <= 0)
|
|
return_0;
|
|
|
|
if (handle_errors)
|
|
EMIT_PARAMS(pos, " 1 handle_errors");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _emit_segment_line(struct dm_task *dmt, uint32_t major,
|
|
uint32_t minor, struct load_segment *seg,
|
|
uint64_t *seg_start, char *params,
|
|
size_t paramsize)
|
|
{
|
|
int pos = 0;
|
|
int r;
|
|
char originbuf[DM_FORMAT_DEV_BUFSIZE], cowbuf[DM_FORMAT_DEV_BUFSIZE];
|
|
|
|
switch(seg->type) {
|
|
case SEG_ERROR:
|
|
case SEG_ZERO:
|
|
case SEG_LINEAR:
|
|
break;
|
|
case SEG_MIRRORED:
|
|
/* Mirrors are pretty complicated - now in separate function */
|
|
r = _mirror_emit_segment_line(dmt, major, minor, seg, seg_start,
|
|
params, paramsize);
|
|
if (!r)
|
|
return_0;
|
|
break;
|
|
case SEG_SNAPSHOT:
|
|
if (!_build_dev_string(originbuf, sizeof(originbuf), seg->origin))
|
|
return_0;
|
|
if (!_build_dev_string(cowbuf, sizeof(cowbuf), seg->cow))
|
|
return_0;
|
|
EMIT_PARAMS(pos, "%s %s %c %d", originbuf, cowbuf,
|
|
seg->persistent ? 'P' : 'N', seg->chunk_size);
|
|
break;
|
|
case SEG_SNAPSHOT_ORIGIN:
|
|
if (!_build_dev_string(originbuf, sizeof(originbuf), seg->origin))
|
|
return_0;
|
|
EMIT_PARAMS(pos, "%s", originbuf);
|
|
break;
|
|
case SEG_STRIPED:
|
|
EMIT_PARAMS(pos, "%u %u ", seg->area_count, seg->stripe_size);
|
|
break;
|
|
case SEG_CRYPT:
|
|
EMIT_PARAMS(pos, "%s%s%s%s%s %s %" PRIu64 " ", seg->cipher,
|
|
seg->chainmode ? "-" : "", seg->chainmode ?: "",
|
|
seg->iv ? "-" : "", seg->iv ?: "", seg->key,
|
|
seg->iv_offset != DM_CRYPT_IV_DEFAULT ?
|
|
seg->iv_offset : *seg_start);
|
|
break;
|
|
}
|
|
|
|
switch(seg->type) {
|
|
case SEG_ERROR:
|
|
case SEG_SNAPSHOT:
|
|
case SEG_SNAPSHOT_ORIGIN:
|
|
case SEG_ZERO:
|
|
break;
|
|
case SEG_CRYPT:
|
|
case SEG_LINEAR:
|
|
case SEG_STRIPED:
|
|
if ((r = _emit_areas_line(dmt, seg, params, paramsize, &pos)) <= 0) {
|
|
stack;
|
|
return r;
|
|
}
|
|
break;
|
|
}
|
|
|
|
log_debug("Adding target to (%" PRIu32 ":%" PRIu32 "): %" PRIu64
|
|
" %" PRIu64 " %s %s", major, minor,
|
|
*seg_start, seg->size, dm_segtypes[seg->type].target, params);
|
|
|
|
if (!dm_task_add_target(dmt, *seg_start, seg->size, dm_segtypes[seg->type].target, params))
|
|
return_0;
|
|
|
|
*seg_start += seg->size;
|
|
|
|
return 1;
|
|
}
|
|
|
|
#undef EMIT_PARAMS
|
|
|
|
static int _emit_segment(struct dm_task *dmt, uint32_t major, uint32_t minor,
|
|
struct load_segment *seg, uint64_t *seg_start)
|
|
{
|
|
char *params;
|
|
size_t paramsize = 4096;
|
|
int ret;
|
|
|
|
do {
|
|
if (!(params = dm_malloc(paramsize))) {
|
|
log_error("Insufficient space for target parameters.");
|
|
return 0;
|
|
}
|
|
|
|
params[0] = '\0';
|
|
ret = _emit_segment_line(dmt, major, minor, seg, seg_start,
|
|
params, paramsize);
|
|
dm_free(params);
|
|
|
|
if (!ret)
|
|
stack;
|
|
|
|
if (ret >= 0)
|
|
return ret;
|
|
|
|
log_debug("Insufficient space in params[%" PRIsize_t
|
|
"] for target parameters.", paramsize);
|
|
|
|
paramsize *= 2;
|
|
} while (paramsize < MAX_TARGET_PARAMSIZE);
|
|
|
|
log_error("Target parameter size too big. Aborting.");
|
|
return 0;
|
|
}
|
|
|
|
static int _load_node(struct dm_tree_node *dnode)
|
|
{
|
|
int r = 0;
|
|
struct dm_task *dmt;
|
|
struct load_segment *seg;
|
|
uint64_t seg_start = 0;
|
|
|
|
log_verbose("Loading %s table (%" PRIu32 ":%" PRIu32 ")", dnode->name,
|
|
dnode->info.major, dnode->info.minor);
|
|
|
|
if (!(dmt = dm_task_create(DM_DEVICE_RELOAD))) {
|
|
log_error("Reload dm_task creation failed for %s", dnode->name);
|
|
return 0;
|
|
}
|
|
|
|
if (!dm_task_set_major(dmt, dnode->info.major) ||
|
|
!dm_task_set_minor(dmt, dnode->info.minor)) {
|
|
log_error("Failed to set device number for %s reload.", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (dnode->props.read_only && !dm_task_set_ro(dmt)) {
|
|
log_error("Failed to set read only flag for %s", dnode->name);
|
|
goto out;
|
|
}
|
|
|
|
if (!dm_task_no_open_count(dmt))
|
|
log_error("Failed to disable open_count");
|
|
|
|
dm_list_iterate_items(seg, &dnode->props.segs)
|
|
if (!_emit_segment(dmt, dnode->info.major, dnode->info.minor,
|
|
seg, &seg_start))
|
|
goto_out;
|
|
|
|
if (!dm_task_suppress_identical_reload(dmt))
|
|
log_error("Failed to suppress reload of identical tables.");
|
|
|
|
if ((r = dm_task_run(dmt))) {
|
|
r = dm_task_get_info(dmt, &dnode->info);
|
|
if (r && !dnode->info.inactive_table)
|
|
log_verbose("Suppressed %s identical table reload.",
|
|
dnode->name);
|
|
|
|
if ((dnode->props.size_changed =
|
|
(dm_task_get_existing_table_size(dmt) == seg_start) ? 0 : 1))
|
|
log_debug("Table size changed from %" PRIu64 " to %"
|
|
PRIu64 " for %s",
|
|
dm_task_get_existing_table_size(dmt),
|
|
seg_start, dnode->name);
|
|
}
|
|
|
|
dnode->props.segment_count = 0;
|
|
|
|
out:
|
|
dm_task_destroy(dmt);
|
|
|
|
return r;
|
|
}
|
|
|
|
int dm_tree_preload_children(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child;
|
|
struct dm_info newinfo;
|
|
|
|
/* Preload children first */
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
/* Skip existing non-device-mapper devices */
|
|
if (!child->info.exists && child->info.major)
|
|
continue;
|
|
|
|
/* Ignore if it doesn't belong to this VG */
|
|
if (child->info.exists &&
|
|
!_uuid_prefix_matches(child->uuid, uuid_prefix, uuid_prefix_len))
|
|
continue;
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_preload_children(child, uuid_prefix, uuid_prefix_len);
|
|
|
|
/* FIXME Cope if name exists with no uuid? */
|
|
if (!child->info.exists) {
|
|
if (!_create_node(child)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (!child->info.inactive_table && child->props.segment_count) {
|
|
if (!_load_node(child)) {
|
|
stack;
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
/* Propagate device size change change */
|
|
if (child->props.size_changed)
|
|
dnode->props.size_changed = 1;
|
|
|
|
/* Resume device immediately if it has parents and its size changed */
|
|
if (!dm_tree_node_num_children(child, 1) || !child->props.size_changed)
|
|
continue;
|
|
|
|
if (!child->info.inactive_table && !child->info.suspended)
|
|
continue;
|
|
|
|
if (!_resume_node(child->name, child->info.major, child->info.minor,
|
|
child->props.read_ahead, child->props.read_ahead_flags,
|
|
&newinfo, &child->dtree->cookie, child->udev_flags)) {
|
|
log_error("Unable to resume %s (%" PRIu32
|
|
":%" PRIu32 ")", child->name, child->info.major,
|
|
child->info.minor);
|
|
continue;
|
|
}
|
|
|
|
/* Update cached info */
|
|
child->info = newinfo;
|
|
}
|
|
|
|
handle = NULL;
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Returns 1 if unsure.
|
|
*/
|
|
int dm_tree_children_use_uuid(struct dm_tree_node *dnode,
|
|
const char *uuid_prefix,
|
|
size_t uuid_prefix_len)
|
|
{
|
|
void *handle = NULL;
|
|
struct dm_tree_node *child = dnode;
|
|
const char *uuid;
|
|
|
|
while ((child = dm_tree_next_child(&handle, dnode, 0))) {
|
|
if (!(uuid = dm_tree_node_get_uuid(child))) {
|
|
log_error("Failed to get uuid for dtree node.");
|
|
return 1;
|
|
}
|
|
|
|
if (_uuid_prefix_matches(uuid, uuid_prefix, uuid_prefix_len))
|
|
return 1;
|
|
|
|
if (dm_tree_node_num_children(child, 0))
|
|
dm_tree_children_use_uuid(child, uuid_prefix, uuid_prefix_len);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Target functions
|
|
*/
|
|
static struct load_segment *_add_segment(struct dm_tree_node *dnode, unsigned type, uint64_t size)
|
|
{
|
|
struct load_segment *seg;
|
|
|
|
if (!(seg = dm_pool_zalloc(dnode->dtree->mem, sizeof(*seg)))) {
|
|
log_error("dtree node segment allocation failed");
|
|
return NULL;
|
|
}
|
|
|
|
seg->type = type;
|
|
seg->size = size;
|
|
seg->area_count = 0;
|
|
dm_list_init(&seg->areas);
|
|
seg->stripe_size = 0;
|
|
seg->persistent = 0;
|
|
seg->chunk_size = 0;
|
|
seg->cow = NULL;
|
|
seg->origin = NULL;
|
|
|
|
dm_list_add(&dnode->props.segs, &seg->list);
|
|
dnode->props.segment_count++;
|
|
|
|
return seg;
|
|
}
|
|
|
|
int dm_tree_node_add_snapshot_origin_target(struct dm_tree_node *dnode,
|
|
uint64_t size,
|
|
const char *origin_uuid)
|
|
{
|
|
struct load_segment *seg;
|
|
struct dm_tree_node *origin_node;
|
|
|
|
if (!(seg = _add_segment(dnode, SEG_SNAPSHOT_ORIGIN, size)))
|
|
return_0;
|
|
|
|
if (!(origin_node = dm_tree_find_node_by_uuid(dnode->dtree, origin_uuid))) {
|
|
log_error("Couldn't find snapshot origin uuid %s.", origin_uuid);
|
|
return 0;
|
|
}
|
|
|
|
seg->origin = origin_node;
|
|
if (!_link_tree_nodes(dnode, origin_node))
|
|
return_0;
|
|
|
|
/* Resume snapshot origins after new snapshots */
|
|
dnode->activation_priority = 1;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_snapshot_target(struct dm_tree_node *node,
|
|
uint64_t size,
|
|
const char *origin_uuid,
|
|
const char *cow_uuid,
|
|
int persistent,
|
|
uint32_t chunk_size)
|
|
{
|
|
struct load_segment *seg;
|
|
struct dm_tree_node *origin_node, *cow_node;
|
|
|
|
if (!(seg = _add_segment(node, SEG_SNAPSHOT, size)))
|
|
return_0;
|
|
|
|
if (!(origin_node = dm_tree_find_node_by_uuid(node->dtree, origin_uuid))) {
|
|
log_error("Couldn't find snapshot origin uuid %s.", origin_uuid);
|
|
return 0;
|
|
}
|
|
|
|
seg->origin = origin_node;
|
|
if (!_link_tree_nodes(node, origin_node))
|
|
return_0;
|
|
|
|
if (!(cow_node = dm_tree_find_node_by_uuid(node->dtree, cow_uuid))) {
|
|
log_error("Couldn't find snapshot origin uuid %s.", cow_uuid);
|
|
return 0;
|
|
}
|
|
|
|
seg->cow = cow_node;
|
|
if (!_link_tree_nodes(node, cow_node))
|
|
return_0;
|
|
|
|
seg->persistent = persistent ? 1 : 0;
|
|
seg->chunk_size = chunk_size;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_error_target(struct dm_tree_node *node,
|
|
uint64_t size)
|
|
{
|
|
if (!_add_segment(node, SEG_ERROR, size))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_zero_target(struct dm_tree_node *node,
|
|
uint64_t size)
|
|
{
|
|
if (!_add_segment(node, SEG_ZERO, size))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_linear_target(struct dm_tree_node *node,
|
|
uint64_t size)
|
|
{
|
|
if (!_add_segment(node, SEG_LINEAR, size))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_striped_target(struct dm_tree_node *node,
|
|
uint64_t size,
|
|
uint32_t stripe_size)
|
|
{
|
|
struct load_segment *seg;
|
|
|
|
if (!(seg = _add_segment(node, SEG_STRIPED, size)))
|
|
return_0;
|
|
|
|
seg->stripe_size = stripe_size;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_crypt_target(struct dm_tree_node *node,
|
|
uint64_t size,
|
|
const char *cipher,
|
|
const char *chainmode,
|
|
const char *iv,
|
|
uint64_t iv_offset,
|
|
const char *key)
|
|
{
|
|
struct load_segment *seg;
|
|
|
|
if (!(seg = _add_segment(node, SEG_CRYPT, size)))
|
|
return_0;
|
|
|
|
seg->cipher = cipher;
|
|
seg->chainmode = chainmode;
|
|
seg->iv = iv;
|
|
seg->iv_offset = iv_offset;
|
|
seg->key = key;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_mirror_target_log(struct dm_tree_node *node,
|
|
uint32_t region_size,
|
|
unsigned clustered,
|
|
const char *log_uuid,
|
|
unsigned area_count,
|
|
uint32_t flags)
|
|
{
|
|
struct dm_tree_node *log_node = NULL;
|
|
struct load_segment *seg;
|
|
|
|
if (!node->props.segment_count) {
|
|
log_error("Internal error: Attempt to add target area to missing segment.");
|
|
return 0;
|
|
}
|
|
|
|
seg = dm_list_item(dm_list_last(&node->props.segs), struct load_segment);
|
|
|
|
if (log_uuid) {
|
|
if (!(seg->uuid = dm_pool_strdup(node->dtree->mem, log_uuid))) {
|
|
log_error("log uuid pool_strdup failed");
|
|
return 0;
|
|
}
|
|
if (!(flags & DM_CORELOG)) {
|
|
if (!(log_node = dm_tree_find_node_by_uuid(node->dtree, log_uuid))) {
|
|
log_error("Couldn't find mirror log uuid %s.", log_uuid);
|
|
return 0;
|
|
}
|
|
|
|
if (!_link_tree_nodes(node, log_node))
|
|
return_0;
|
|
}
|
|
}
|
|
|
|
seg->log = log_node;
|
|
seg->region_size = region_size;
|
|
seg->clustered = clustered;
|
|
seg->mirror_area_count = area_count;
|
|
seg->flags = flags;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_mirror_target(struct dm_tree_node *node,
|
|
uint64_t size)
|
|
{
|
|
struct load_segment *seg;
|
|
|
|
if (!(seg = _add_segment(node, SEG_MIRRORED, size)))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int _add_area(struct dm_tree_node *node, struct load_segment *seg, struct dm_tree_node *dev_node, uint64_t offset)
|
|
{
|
|
struct seg_area *area;
|
|
|
|
if (!(area = dm_pool_zalloc(node->dtree->mem, sizeof (*area)))) {
|
|
log_error("Failed to allocate target segment area.");
|
|
return 0;
|
|
}
|
|
|
|
area->dev_node = dev_node;
|
|
area->offset = offset;
|
|
|
|
dm_list_add(&seg->areas, &area->list);
|
|
seg->area_count++;
|
|
|
|
return 1;
|
|
}
|
|
|
|
int dm_tree_node_add_target_area(struct dm_tree_node *node,
|
|
const char *dev_name,
|
|
const char *uuid,
|
|
uint64_t offset)
|
|
{
|
|
struct load_segment *seg;
|
|
struct stat info;
|
|
struct dm_tree_node *dev_node;
|
|
|
|
if ((!dev_name || !*dev_name) && (!uuid || !*uuid)) {
|
|
log_error("dm_tree_node_add_target_area called without device");
|
|
return 0;
|
|
}
|
|
|
|
if (uuid) {
|
|
if (!(dev_node = dm_tree_find_node_by_uuid(node->dtree, uuid))) {
|
|
log_error("Couldn't find area uuid %s.", uuid);
|
|
return 0;
|
|
}
|
|
if (!_link_tree_nodes(node, dev_node))
|
|
return_0;
|
|
} else {
|
|
if (stat(dev_name, &info) < 0) {
|
|
log_error("Device %s not found.", dev_name);
|
|
return 0;
|
|
}
|
|
|
|
if (!S_ISBLK(info.st_mode)) {
|
|
log_error("Device %s is not a block device.", dev_name);
|
|
return 0;
|
|
}
|
|
|
|
/* FIXME Check correct macro use */
|
|
if (!(dev_node = _add_dev(node->dtree, node, MAJOR(info.st_rdev), MINOR(info.st_rdev))))
|
|
return_0;
|
|
}
|
|
|
|
if (!node->props.segment_count) {
|
|
log_error("Internal error: Attempt to add target area to missing segment.");
|
|
return 0;
|
|
}
|
|
|
|
seg = dm_list_item(dm_list_last(&node->props.segs), struct load_segment);
|
|
|
|
if (!_add_area(node, seg, dev_node, offset))
|
|
return_0;
|
|
|
|
return 1;
|
|
}
|
|
|
|
void dm_tree_set_cookie(struct dm_tree_node *node, uint32_t cookie)
|
|
{
|
|
node->dtree->cookie = cookie;
|
|
}
|
|
|
|
uint32_t dm_tree_get_cookie(struct dm_tree_node *node)
|
|
{
|
|
return node->dtree->cookie;
|
|
}
|