2 * Copyright (C) 2005-2011 Red Hat, Inc. All rights reserved.
4 * This file is part of the device-mapper userspace tools.
6 * This copyrighted material is made available to anyone wishing to use,
7 * modify, copy, or redistribute it subject to the terms and conditions
8 * of the GNU Lesser General Public License v.2.1.
10 * You should have received a copy of the GNU Lesser General Public License
11 * along with this program; if not, write to the Free Software Foundation,
12 * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
16 #include "libdm-targets.h"
17 #include "libdm-common.h"
22 #include <sys/param.h>
23 #include <sys/utsname.h>
25 #define MAX_TARGET_PARAMSIZE 500000
27 /* FIXME Fix interface so this is used only by LVM */
28 #define UUID_PREFIX "LVM-"
30 #define REPLICATOR_LOCAL_SITE 0
32 /* Supported segment types */
59 /* FIXME Add crypt and multipath support */
65 { SEG_CRYPT
, "crypt" },
66 { SEG_ERROR
, "error" },
67 { SEG_LINEAR
, "linear" },
68 { SEG_MIRRORED
, "mirror" },
69 { SEG_REPLICATOR
, "replicator" },
70 { SEG_REPLICATOR_DEV
, "replicator-dev" },
71 { SEG_SNAPSHOT
, "snapshot" },
72 { SEG_SNAPSHOT_ORIGIN
, "snapshot-origin" },
73 { SEG_SNAPSHOT_MERGE
, "snapshot-merge" },
74 { SEG_STRIPED
, "striped" },
76 { SEG_THIN_POOL
, "thin-pool"},
78 { SEG_RAID1
, "raid1"},
79 { SEG_RAID4
, "raid4"},
80 { SEG_RAID5_LA
, "raid5_la"},
81 { SEG_RAID5_RA
, "raid5_ra"},
82 { SEG_RAID5_LS
, "raid5_ls"},
83 { SEG_RAID5_RS
, "raid5_rs"},
84 { SEG_RAID6_ZR
, "raid6_zr"},
85 { SEG_RAID6_NR
, "raid6_nr"},
86 { SEG_RAID6_NC
, "raid6_nc"},
89 *WARNING: Since 'raid' target overloads this 1:1 mapping table
90 * for search do not add new enum elements past them!
92 { SEG_RAID5_LS
, "raid5"}, /* same as "raid5_ls" (default for MD also) */
93 { SEG_RAID6_ZR
, "raid6"}, /* same as "raid6_zr" */
97 /* Some segment types have a list of areas of other devices attached */
101 struct dm_tree_node
*dev_node
;
105 unsigned rsite_index
; /* Replicator site index */
106 struct dm_tree_node
*slog
; /* Replicator sync log node */
107 uint64_t region_size
; /* Replicator sync log size */
108 uint32_t flags
; /* Replicator sync log flags */
111 struct thin_message
{
113 struct dm_thin_message message
;
117 /* Replicator-log has a list of sites */
118 /* FIXME: maybe move to seg_area too? */
119 struct replicator_site
{
122 unsigned rsite_index
;
123 dm_replicator_mode_t mode
;
124 uint32_t async_timeout
;
125 uint32_t fall_behind_ios
;
126 uint64_t fall_behind_data
;
129 /* Per-segment properties */
130 struct load_segment
{
137 unsigned area_count
; /* Linear + Striped + Mirrored + Crypt + Replicator */
138 struct dm_list areas
; /* Linear + Striped + Mirrored + Crypt + Replicator */
140 uint32_t stripe_size
; /* Striped + raid */
142 int persistent
; /* Snapshot */
143 uint32_t chunk_size
; /* Snapshot */
144 struct dm_tree_node
*cow
; /* Snapshot */
145 struct dm_tree_node
*origin
; /* Snapshot + Snapshot origin */
146 struct dm_tree_node
*merge
; /* Snapshot */
148 struct dm_tree_node
*log
; /* Mirror + Replicator */
149 uint32_t region_size
; /* Mirror + raid */
150 unsigned clustered
; /* Mirror */
151 unsigned mirror_area_count
; /* Mirror */
152 uint32_t flags
; /* Mirror log */
153 char *uuid
; /* Clustered mirror log */
155 const char *cipher
; /* Crypt */
156 const char *chainmode
; /* Crypt */
157 const char *iv
; /* Crypt */
158 uint64_t iv_offset
; /* Crypt */
159 const char *key
; /* Crypt */
161 const char *rlog_type
; /* Replicator */
162 struct dm_list rsites
; /* Replicator */
163 unsigned rsite_count
; /* Replicator */
164 unsigned rdevice_count
; /* Replicator */
165 struct dm_tree_node
*replicator
;/* Replicator-dev */
166 uint64_t rdevice_index
; /* Replicator-dev */
168 uint64_t rebuilds
; /* raid */
170 struct dm_tree_node
*metadata
; /* Thin_pool */
171 struct dm_tree_node
*pool
; /* Thin_pool, Thin */
172 struct dm_list thin_messages
; /* Thin_pool */
173 uint64_t low_water_mark
; /* Thin_pool */
174 uint32_t data_block_size
; /* Thin_pool */
175 unsigned skip_block_zeroing
; /* Thin_pool */
176 uint32_t device_id
; /* Thin */
180 /* Per-device properties */
181 struct load_properties
{
187 uint32_t read_ahead_flags
;
189 uint64_t thin_pool_transaction_id
; /* Thin_pool */
191 unsigned segment_count
;
192 unsigned size_changed
;
195 const char *new_name
;
197 /* If immediate_dev_node is set to 1, try to create the dev node
198 * as soon as possible (e.g. in preload stage even during traversal
199 * and processing of dm tree). This will also flush all stacked dev
200 * node operations, synchronizing with udev.
202 unsigned immediate_dev_node
;
205 * If the device size changed from zero and this is set,
206 * don't resume the device immediately, even if the device
207 * has parents. This works provided the parents do not
208 * validate the device size and is required by pvmove to
209 * avoid starting the mirror resync operation too early.
211 unsigned delay_resume_if_new
;
214 /* Two of these used to join two nodes with uses and used_by. */
215 struct dm_tree_link
{
217 struct dm_tree_node
*node
;
220 struct dm_tree_node
{
221 struct dm_tree
*dtree
;
227 struct dm_list uses
; /* Nodes this node uses */
228 struct dm_list used_by
; /* Nodes that use this node */
230 int activation_priority
; /* 0 gets activated first */
232 uint16_t udev_flags
; /* Udev control flags */
234 void *context
; /* External supplied context */
236 struct load_properties props
; /* For creation/table (re)load */
239 * If presuspend of child node is needed
240 * Note: only direct child is allowed
242 struct dm_tree_node
*presuspend_node
;
247 struct dm_hash_table
*devs
;
248 struct dm_hash_table
*uuids
;
249 struct dm_tree_node root
;
250 int skip_lockfs
; /* 1 skips lockfs (for non-snapshots) */
251 int no_flush
; /* 1 sets noflush (mirrors/multipath) */
252 int retry_remove
; /* 1 retries remove if not successful */
256 struct dm_tree
*dm_tree_create(void)
258 struct dm_pool
*dmem
;
259 struct dm_tree
*dtree
;
261 if (!(dmem
= dm_pool_create("dtree", 1024)) ||
262 !(dtree
= dm_pool_zalloc(dmem
, sizeof(*dtree
)))) {
263 log_error("Failed to allocate dtree.");
265 dm_pool_destroy(dmem
);
269 dtree
->root
.dtree
= dtree
;
270 dm_list_init(&dtree
->root
.uses
);
271 dm_list_init(&dtree
->root
.used_by
);
272 dtree
->skip_lockfs
= 0;
276 if (!(dtree
->devs
= dm_hash_create(8))) {
277 log_error("dtree hash creation failed");
278 dm_pool_destroy(dtree
->mem
);
282 if (!(dtree
->uuids
= dm_hash_create(32))) {
283 log_error("dtree uuid hash creation failed");
284 dm_hash_destroy(dtree
->devs
);
285 dm_pool_destroy(dtree
->mem
);
292 void dm_tree_free(struct dm_tree
*dtree
)
297 dm_hash_destroy(dtree
->uuids
);
298 dm_hash_destroy(dtree
->devs
);
299 dm_pool_destroy(dtree
->mem
);
302 static int _nodes_are_linked(const struct dm_tree_node
*parent
,
303 const struct dm_tree_node
*child
)
305 struct dm_tree_link
*dlink
;
307 dm_list_iterate_items(dlink
, &parent
->uses
)
308 if (dlink
->node
== child
)
314 static int _link(struct dm_list
*list
, struct dm_tree_node
*node
)
316 struct dm_tree_link
*dlink
;
318 if (!(dlink
= dm_pool_alloc(node
->dtree
->mem
, sizeof(*dlink
)))) {
319 log_error("dtree link allocation failed");
324 dm_list_add(list
, &dlink
->list
);
329 static int _link_nodes(struct dm_tree_node
*parent
,
330 struct dm_tree_node
*child
)
332 if (_nodes_are_linked(parent
, child
))
335 if (!_link(&parent
->uses
, child
))
338 if (!_link(&child
->used_by
, parent
))
344 static void _unlink(struct dm_list
*list
, struct dm_tree_node
*node
)
346 struct dm_tree_link
*dlink
;
348 dm_list_iterate_items(dlink
, list
)
349 if (dlink
->node
== node
) {
350 dm_list_del(&dlink
->list
);
355 static void _unlink_nodes(struct dm_tree_node
*parent
,
356 struct dm_tree_node
*child
)
358 if (!_nodes_are_linked(parent
, child
))
361 _unlink(&parent
->uses
, child
);
362 _unlink(&child
->used_by
, parent
);
365 static int _add_to_toplevel(struct dm_tree_node
*node
)
367 return _link_nodes(&node
->dtree
->root
, node
);
370 static void _remove_from_toplevel(struct dm_tree_node
*node
)
372 _unlink_nodes(&node
->dtree
->root
, node
);
375 static int _add_to_bottomlevel(struct dm_tree_node
*node
)
377 return _link_nodes(node
, &node
->dtree
->root
);
380 static void _remove_from_bottomlevel(struct dm_tree_node
*node
)
382 _unlink_nodes(node
, &node
->dtree
->root
);
385 static int _link_tree_nodes(struct dm_tree_node
*parent
, struct dm_tree_node
*child
)
387 /* Don't link to root node if child already has a parent */
388 if (parent
== &parent
->dtree
->root
) {
389 if (dm_tree_node_num_children(child
, 1))
392 _remove_from_toplevel(child
);
394 if (child
== &child
->dtree
->root
) {
395 if (dm_tree_node_num_children(parent
, 0))
398 _remove_from_bottomlevel(parent
);
400 return _link_nodes(parent
, child
);
403 static struct dm_tree_node
*_create_dm_tree_node(struct dm_tree
*dtree
,
406 struct dm_info
*info
,
410 struct dm_tree_node
*node
;
413 if (!(node
= dm_pool_zalloc(dtree
->mem
, sizeof(*node
)))) {
414 log_error("_create_dm_tree_node alloc failed");
423 node
->context
= context
;
424 node
->udev_flags
= udev_flags
;
425 node
->activation_priority
= 0;
427 dm_list_init(&node
->uses
);
428 dm_list_init(&node
->used_by
);
429 dm_list_init(&node
->props
.segs
);
431 dev
= MKDEV(info
->major
, info
->minor
);
433 if (!dm_hash_insert_binary(dtree
->devs
, (const char *) &dev
,
434 sizeof(dev
), node
)) {
435 log_error("dtree node hash insertion failed");
436 dm_pool_free(dtree
->mem
, node
);
441 !dm_hash_insert(dtree
->uuids
, uuid
, node
)) {
442 log_error("dtree uuid hash insertion failed");
443 dm_hash_remove_binary(dtree
->devs
, (const char *) &dev
,
445 dm_pool_free(dtree
->mem
, node
);
452 static struct dm_tree_node
*_find_dm_tree_node(struct dm_tree
*dtree
,
453 uint32_t major
, uint32_t minor
)
455 uint64_t dev
= MKDEV(major
, minor
);
457 return dm_hash_lookup_binary(dtree
->devs
, (const char *) &dev
,
461 static struct dm_tree_node
*_find_dm_tree_node_by_uuid(struct dm_tree
*dtree
,
464 struct dm_tree_node
*node
;
466 if ((node
= dm_hash_lookup(dtree
->uuids
, uuid
)))
469 if (strncmp(uuid
, UUID_PREFIX
, sizeof(UUID_PREFIX
) - 1))
472 return dm_hash_lookup(dtree
->uuids
, uuid
+ sizeof(UUID_PREFIX
) - 1);
475 static int _deps(struct dm_task
**dmt
, struct dm_pool
*mem
, uint32_t major
, uint32_t minor
,
476 const char **name
, const char **uuid
,
477 struct dm_info
*info
, struct dm_deps
**deps
)
479 memset(info
, 0, sizeof(*info
));
481 if (!dm_is_dm_major(major
)) {
488 info
->live_table
= 0;
489 info
->inactive_table
= 0;
494 if (!(*dmt
= dm_task_create(DM_DEVICE_DEPS
))) {
495 log_error("deps dm_task creation failed");
499 if (!dm_task_set_major(*dmt
, major
)) {
500 log_error("_deps: failed to set major for (%" PRIu32
":%" PRIu32
")",
505 if (!dm_task_set_minor(*dmt
, minor
)) {
506 log_error("_deps: failed to set minor for (%" PRIu32
":%" PRIu32
")",
511 if (!dm_task_run(*dmt
)) {
512 log_error("_deps: task run failed for (%" PRIu32
":%" PRIu32
")",
517 if (!dm_task_get_info(*dmt
, info
)) {
518 log_error("_deps: failed to get info for (%" PRIu32
":%" PRIu32
")",
528 if (info
->major
!= major
) {
529 log_error("Inconsistent dtree major number: %u != %u",
533 if (info
->minor
!= minor
) {
534 log_error("Inconsistent dtree minor number: %u != %u",
538 if (!(*name
= dm_pool_strdup(mem
, dm_task_get_name(*dmt
)))) {
539 log_error("name pool_strdup failed");
542 if (!(*uuid
= dm_pool_strdup(mem
, dm_task_get_uuid(*dmt
)))) {
543 log_error("uuid pool_strdup failed");
546 *deps
= dm_task_get_deps(*dmt
);
552 dm_task_destroy(*dmt
);
556 static struct dm_tree_node
*_add_dev(struct dm_tree
*dtree
,
557 struct dm_tree_node
*parent
,
558 uint32_t major
, uint32_t minor
,
561 struct dm_task
*dmt
= NULL
;
563 struct dm_deps
*deps
= NULL
;
564 const char *name
= NULL
;
565 const char *uuid
= NULL
;
566 struct dm_tree_node
*node
= NULL
;
570 /* Already in tree? */
571 if (!(node
= _find_dm_tree_node(dtree
, major
, minor
))) {
572 if (!_deps(&dmt
, dtree
->mem
, major
, minor
, &name
, &uuid
, &info
, &deps
))
575 if (!(node
= _create_dm_tree_node(dtree
, name
, uuid
, &info
,
581 if (!_link_tree_nodes(parent
, node
)) {
586 /* If node was already in tree, no need to recurse. */
590 /* Can't recurse if not a mapped device or there are no dependencies */
591 if (!node
->info
.exists
|| !deps
->count
) {
592 if (!_add_to_bottomlevel(node
)) {
599 /* Add dependencies to tree */
600 for (i
= 0; i
< deps
->count
; i
++)
601 if (!_add_dev(dtree
, node
, MAJOR(deps
->device
[i
]),
602 MINOR(deps
->device
[i
]), udev_flags
)) {
609 dm_task_destroy(dmt
);
614 static int _node_clear_table(struct dm_tree_node
*dnode
)
617 struct dm_info
*info
;
621 if (!(info
= &dnode
->info
)) {
622 log_error("_node_clear_table failed: missing info");
626 if (!(name
= dm_tree_node_get_name(dnode
))) {
627 log_error("_node_clear_table failed: missing name");
631 /* Is there a table? */
632 if (!info
->exists
|| !info
->inactive_table
)
635 // FIXME Get inactive deps. If any dev referenced has 1 opener and no live table, remove it after the clear.
637 log_verbose("Clearing inactive table %s (%" PRIu32
":%" PRIu32
")",
638 name
, info
->major
, info
->minor
);
640 if (!(dmt
= dm_task_create(DM_DEVICE_CLEAR
))) {
641 log_error("Table clear dm_task creation failed for %s", name
);
645 if (!dm_task_set_major(dmt
, info
->major
) ||
646 !dm_task_set_minor(dmt
, info
->minor
)) {
647 log_error("Failed to set device number for %s table clear", name
);
648 dm_task_destroy(dmt
);
652 r
= dm_task_run(dmt
);
654 if (!dm_task_get_info(dmt
, info
)) {
655 log_error("_node_clear_table failed: info missing after running task for %s", name
);
659 dm_task_destroy(dmt
);
664 struct dm_tree_node
*dm_tree_add_new_dev(struct dm_tree
*dtree
,
667 uint32_t major
, uint32_t minor
,
672 struct dm_tree_node
*dnode
;
677 /* Do we need to add node to tree? */
678 if (!(dnode
= dm_tree_find_node_by_uuid(dtree
, uuid
))) {
679 if (!(name2
= dm_pool_strdup(dtree
->mem
, name
))) {
680 log_error("name pool_strdup failed");
683 if (!(uuid2
= dm_pool_strdup(dtree
->mem
, uuid
))) {
684 log_error("uuid pool_strdup failed");
692 info
.inactive_table
= 0;
695 if (!(dnode
= _create_dm_tree_node(dtree
, name2
, uuid2
, &info
,
699 /* Attach to root node until a table is supplied */
700 if (!_add_to_toplevel(dnode
) || !_add_to_bottomlevel(dnode
))
703 dnode
->props
.major
= major
;
704 dnode
->props
.minor
= minor
;
705 dnode
->props
.new_name
= NULL
;
706 dnode
->props
.size_changed
= 0;
707 } else if (strcmp(name
, dnode
->name
)) {
708 /* Do we need to rename node? */
709 if (!(dnode
->props
.new_name
= dm_pool_strdup(dtree
->mem
, name
))) {
710 log_error("name pool_strdup failed");
715 dnode
->props
.read_only
= read_only
? 1 : 0;
716 dnode
->props
.read_ahead
= DM_READ_AHEAD_AUTO
;
717 dnode
->props
.read_ahead_flags
= 0;
719 if (clear_inactive
&& !_node_clear_table(dnode
))
722 dnode
->context
= context
;
723 dnode
->udev_flags
= 0;
728 struct dm_tree_node
*dm_tree_add_new_dev_with_udev_flags(struct dm_tree
*dtree
,
738 struct dm_tree_node
*node
;
740 if ((node
= dm_tree_add_new_dev(dtree
, name
, uuid
, major
, minor
, read_only
,
741 clear_inactive
, context
)))
742 node
->udev_flags
= udev_flags
;
747 void dm_tree_node_set_udev_flags(struct dm_tree_node
*dnode
, uint16_t udev_flags
)
750 struct dm_info
*dinfo
= &dnode
->info
;
752 if (udev_flags
!= dnode
->udev_flags
)
753 log_debug("Resetting %s (%" PRIu32
":%" PRIu32
754 ") udev_flags from 0x%x to 0x%x",
755 dnode
->name
, dinfo
->major
, dinfo
->minor
,
756 dnode
->udev_flags
, udev_flags
);
757 dnode
->udev_flags
= udev_flags
;
760 void dm_tree_node_set_read_ahead(struct dm_tree_node
*dnode
,
762 uint32_t read_ahead_flags
)
764 dnode
->props
.read_ahead
= read_ahead
;
765 dnode
->props
.read_ahead_flags
= read_ahead_flags
;
768 void dm_tree_node_set_presuspend_node(struct dm_tree_node
*node
,
769 struct dm_tree_node
*presuspend_node
)
771 node
->presuspend_node
= presuspend_node
;
774 int dm_tree_add_dev(struct dm_tree
*dtree
, uint32_t major
, uint32_t minor
)
776 return _add_dev(dtree
, &dtree
->root
, major
, minor
, 0) ? 1 : 0;
779 int dm_tree_add_dev_with_udev_flags(struct dm_tree
*dtree
, uint32_t major
,
780 uint32_t minor
, uint16_t udev_flags
)
782 return _add_dev(dtree
, &dtree
->root
, major
, minor
, udev_flags
) ? 1 : 0;
785 const char *dm_tree_node_get_name(const struct dm_tree_node
*node
)
787 return node
->info
.exists
? node
->name
: "";
790 const char *dm_tree_node_get_uuid(const struct dm_tree_node
*node
)
792 return node
->info
.exists
? node
->uuid
: "";
795 const struct dm_info
*dm_tree_node_get_info(const struct dm_tree_node
*node
)
800 void *dm_tree_node_get_context(const struct dm_tree_node
*node
)
802 return node
->context
;
805 int dm_tree_node_size_changed(const struct dm_tree_node
*dnode
)
807 return dnode
->props
.size_changed
;
810 int dm_tree_node_num_children(const struct dm_tree_node
*node
, uint32_t inverted
)
813 if (_nodes_are_linked(&node
->dtree
->root
, node
))
815 return dm_list_size(&node
->used_by
);
818 if (_nodes_are_linked(node
, &node
->dtree
->root
))
821 return dm_list_size(&node
->uses
);
825 * Returns 1 if no prefix supplied
827 static int _uuid_prefix_matches(const char *uuid
, const char *uuid_prefix
, size_t uuid_prefix_len
)
832 if (!strncmp(uuid
, uuid_prefix
, uuid_prefix_len
))
835 /* Handle transition: active device uuids might be missing the prefix */
836 if (uuid_prefix_len
<= 4)
839 if (!strncmp(uuid
, UUID_PREFIX
, sizeof(UUID_PREFIX
) - 1))
842 if (strncmp(uuid_prefix
, UUID_PREFIX
, sizeof(UUID_PREFIX
) - 1))
845 if (!strncmp(uuid
, uuid_prefix
+ sizeof(UUID_PREFIX
) - 1, uuid_prefix_len
- (sizeof(UUID_PREFIX
) - 1)))
852 * Returns 1 if no children.
854 static int _children_suspended(struct dm_tree_node
*node
,
856 const char *uuid_prefix
,
857 size_t uuid_prefix_len
)
859 struct dm_list
*list
;
860 struct dm_tree_link
*dlink
;
861 const struct dm_info
*dinfo
;
865 if (_nodes_are_linked(&node
->dtree
->root
, node
))
867 list
= &node
->used_by
;
869 if (_nodes_are_linked(node
, &node
->dtree
->root
))
874 dm_list_iterate_items(dlink
, list
) {
875 if (!(uuid
= dm_tree_node_get_uuid(dlink
->node
))) {
880 /* Ignore if it doesn't belong to this VG */
881 if (!_uuid_prefix_matches(uuid
, uuid_prefix
, uuid_prefix_len
))
884 /* Ignore if parent node wants to presuspend this node */
885 if (dlink
->node
->presuspend_node
== node
)
888 if (!(dinfo
= dm_tree_node_get_info(dlink
->node
))) {
889 stack
; /* FIXME Is this normal? */
893 if (!dinfo
->suspended
)
901 * Set major and minor to zero for root of tree.
903 struct dm_tree_node
*dm_tree_find_node(struct dm_tree
*dtree
,
907 if (!major
&& !minor
)
910 return _find_dm_tree_node(dtree
, major
, minor
);
914 * Set uuid to NULL for root of tree.
916 struct dm_tree_node
*dm_tree_find_node_by_uuid(struct dm_tree
*dtree
,
922 return _find_dm_tree_node_by_uuid(dtree
, uuid
);
926 * First time set *handle to NULL.
927 * Set inverted to invert the tree.
929 struct dm_tree_node
*dm_tree_next_child(void **handle
,
930 const struct dm_tree_node
*parent
,
933 struct dm_list
**dlink
= (struct dm_list
**) handle
;
934 const struct dm_list
*use_list
;
937 use_list
= &parent
->used_by
;
939 use_list
= &parent
->uses
;
942 *dlink
= dm_list_first(use_list
);
944 *dlink
= dm_list_next(use_list
, *dlink
);
946 return (*dlink
) ? dm_list_item(*dlink
, struct dm_tree_link
)->node
: NULL
;
950 * Deactivate a device with its dependencies if the uuid prefix matches.
952 static int _info_by_dev(uint32_t major
, uint32_t minor
, int with_open_count
,
953 struct dm_info
*info
)
958 if (!(dmt
= dm_task_create(DM_DEVICE_INFO
))) {
959 log_error("_info_by_dev: dm_task creation failed");
963 if (!dm_task_set_major(dmt
, major
) || !dm_task_set_minor(dmt
, minor
)) {
964 log_error("_info_by_dev: Failed to set device number");
965 dm_task_destroy(dmt
);
969 if (!with_open_count
&& !dm_task_no_open_count(dmt
))
970 log_error("Failed to disable open_count");
972 if ((r
= dm_task_run(dmt
)))
973 r
= dm_task_get_info(dmt
, info
);
975 dm_task_destroy(dmt
);
980 static int _check_device_not_in_use(const char *name
, struct dm_info
*info
)
985 /* If sysfs is not used, use open_count information only. */
986 if (!*dm_sysfs_dir()) {
987 if (info
->open_count
) {
988 log_error("Device %s (%" PRIu32
":%" PRIu32
") in use",
989 name
, info
->major
, info
->minor
);
996 if (dm_device_has_holders(info
->major
, info
->minor
)) {
997 log_error("Device %s (%" PRIu32
":%" PRIu32
") is used "
998 "by another device.", name
, info
->major
, info
->minor
);
1002 if (dm_device_has_mounted_fs(info
->major
, info
->minor
)) {
1003 log_error("Device %s (%" PRIu32
":%" PRIu32
") contains "
1004 "a filesystem in use.", name
, info
->major
, info
->minor
);
1011 /* Check if all parent nodes of given node have open_count == 0 */
1012 static int _node_has_closed_parents(struct dm_tree_node
*node
,
1013 const char *uuid_prefix
,
1014 size_t uuid_prefix_len
)
1016 struct dm_tree_link
*dlink
;
1017 const struct dm_info
*dinfo
;
1018 struct dm_info info
;
1021 /* Iterate through parents of this node */
1022 dm_list_iterate_items(dlink
, &node
->used_by
) {
1023 if (!(uuid
= dm_tree_node_get_uuid(dlink
->node
))) {
1028 /* Ignore if it doesn't belong to this VG */
1029 if (!_uuid_prefix_matches(uuid
, uuid_prefix
, uuid_prefix_len
))
1032 if (!(dinfo
= dm_tree_node_get_info(dlink
->node
))) {
1033 stack
; /* FIXME Is this normal? */
1037 /* Refresh open_count */
1038 if (!_info_by_dev(dinfo
->major
, dinfo
->minor
, 1, &info
) ||
1042 if (info
.open_count
) {
1043 log_debug("Node %s %d:%d has open_count %d", uuid_prefix
,
1044 dinfo
->major
, dinfo
->minor
, info
.open_count
);
1052 static int _deactivate_node(const char *name
, uint32_t major
, uint32_t minor
,
1053 uint32_t *cookie
, uint16_t udev_flags
, int retry
)
1055 struct dm_task
*dmt
;
1058 log_verbose("Removing %s (%" PRIu32
":%" PRIu32
")", name
, major
, minor
);
1060 if (!(dmt
= dm_task_create(DM_DEVICE_REMOVE
))) {
1061 log_error("Deactivation dm_task creation failed for %s", name
);
1065 if (!dm_task_set_major(dmt
, major
) || !dm_task_set_minor(dmt
, minor
)) {
1066 log_error("Failed to set device number for %s deactivation", name
);
1070 if (!dm_task_no_open_count(dmt
))
1071 log_error("Failed to disable open_count");
1073 if (!dm_task_set_cookie(dmt
, cookie
, udev_flags
))
1078 dm_task_retry_remove(dmt
);
1080 r
= dm_task_run(dmt
);
1082 /* FIXME Until kernel returns actual name so dm-iface.c can handle it */
1083 rm_dev_node(name
, dmt
->cookie_set
&& !(udev_flags
& DM_UDEV_DISABLE_DM_RULES_FLAG
),
1084 dmt
->cookie_set
&& (udev_flags
& DM_UDEV_DISABLE_LIBRARY_FALLBACK
));
1086 /* FIXME Remove node from tree or mark invalid? */
1089 dm_task_destroy(dmt
);
1094 static int _rename_node(const char *old_name
, const char *new_name
, uint32_t major
,
1095 uint32_t minor
, uint32_t *cookie
, uint16_t udev_flags
)
1097 struct dm_task
*dmt
;
1100 log_verbose("Renaming %s (%" PRIu32
":%" PRIu32
") to %s", old_name
, major
, minor
, new_name
);
1102 if (!(dmt
= dm_task_create(DM_DEVICE_RENAME
))) {
1103 log_error("Rename dm_task creation failed for %s", old_name
);
1107 if (!dm_task_set_name(dmt
, old_name
)) {
1108 log_error("Failed to set name for %s rename.", old_name
);
1112 if (!dm_task_set_newname(dmt
, new_name
))
1115 if (!dm_task_no_open_count(dmt
))
1116 log_error("Failed to disable open_count");
1118 if (!dm_task_set_cookie(dmt
, cookie
, udev_flags
))
1121 r
= dm_task_run(dmt
);
1124 dm_task_destroy(dmt
);
1129 /* FIXME Merge with _suspend_node? */
1130 static int _resume_node(const char *name
, uint32_t major
, uint32_t minor
,
1131 uint32_t read_ahead
, uint32_t read_ahead_flags
,
1132 struct dm_info
*newinfo
, uint32_t *cookie
,
1133 uint16_t udev_flags
, int already_suspended
)
1135 struct dm_task
*dmt
;
1138 log_verbose("Resuming %s (%" PRIu32
":%" PRIu32
")", name
, major
, minor
);
1140 if (!(dmt
= dm_task_create(DM_DEVICE_RESUME
))) {
1141 log_debug("Suspend dm_task creation failed for %s.", name
);
1145 /* FIXME Kernel should fill in name on return instead */
1146 if (!dm_task_set_name(dmt
, name
)) {
1147 log_debug("Failed to set device name for %s resumption.", name
);
1151 if (!dm_task_set_major(dmt
, major
) || !dm_task_set_minor(dmt
, minor
)) {
1152 log_error("Failed to set device number for %s resumption.", name
);
1156 if (!dm_task_no_open_count(dmt
))
1157 log_error("Failed to disable open_count");
1159 if (!dm_task_set_read_ahead(dmt
, read_ahead
, read_ahead_flags
))
1160 log_error("Failed to set read ahead");
1162 if (!dm_task_set_cookie(dmt
, cookie
, udev_flags
))
1165 if (!(r
= dm_task_run(dmt
)))
1168 if (already_suspended
)
1171 if (!(r
= dm_task_get_info(dmt
, newinfo
)))
1175 dm_task_destroy(dmt
);
1180 static int _suspend_node(const char *name
, uint32_t major
, uint32_t minor
,
1181 int skip_lockfs
, int no_flush
, struct dm_info
*newinfo
)
1183 struct dm_task
*dmt
;
1186 log_verbose("Suspending %s (%" PRIu32
":%" PRIu32
")%s%s",
1188 skip_lockfs
? "" : " with filesystem sync",
1189 no_flush
? "" : " with device flush");
1191 if (!(dmt
= dm_task_create(DM_DEVICE_SUSPEND
))) {
1192 log_error("Suspend dm_task creation failed for %s", name
);
1196 if (!dm_task_set_major(dmt
, major
) || !dm_task_set_minor(dmt
, minor
)) {
1197 log_error("Failed to set device number for %s suspension.", name
);
1198 dm_task_destroy(dmt
);
1202 if (!dm_task_no_open_count(dmt
))
1203 log_error("Failed to disable open_count");
1205 if (skip_lockfs
&& !dm_task_skip_lockfs(dmt
))
1206 log_error("Failed to set skip_lockfs flag.");
1208 if (no_flush
&& !dm_task_no_flush(dmt
))
1209 log_error("Failed to set no_flush flag.");
1211 if ((r
= dm_task_run(dmt
))) {
1213 r
= dm_task_get_info(dmt
, newinfo
);
1216 dm_task_destroy(dmt
);
1221 static int _thin_pool_status_transaction_id(struct dm_tree_node
*dnode
, uint64_t *transaction_id
)
1223 struct dm_task
*dmt
;
1225 uint64_t start
, length
;
1227 char *params
= NULL
;
1229 if (!(dmt
= dm_task_create(DM_DEVICE_STATUS
)))
1232 if (!dm_task_set_major(dmt
, dnode
->info
.major
) ||
1233 !dm_task_set_minor(dmt
, dnode
->info
.minor
)) {
1234 log_error("Failed to set major minor.");
1238 if (!dm_task_run(dmt
))
1241 dm_get_next_target(dmt
, NULL
, &start
, &length
, &type
, ¶ms
);
1243 if (type
&& (strcmp(type
, "thin-pool") != 0)) {
1244 log_error("Expected thin-pool target for %d:%d and got %s.",
1245 dnode
->info
.major
, dnode
->info
.minor
, type
);
1249 if (!params
|| (sscanf(params
, "%" PRIu64
, transaction_id
) != 1)) {
1250 log_error("Failed to parse transaction_id from %s.", params
);
1254 log_debug("Thin pool transaction id: %" PRIu64
" status: %s.", *transaction_id
, params
);
1258 dm_task_destroy(dmt
);
1263 static int _thin_pool_node_message(struct dm_tree_node
*dnode
, struct thin_message
*tm
)
1265 struct dm_task
*dmt
;
1266 struct dm_thin_message
*m
= &tm
->message
;
1271 case DM_THIN_MESSAGE_CREATE_SNAP
:
1272 r
= dm_snprintf(buf
, sizeof(buf
), "create_snap %u %u",
1273 m
->u
.m_create_snap
.device_id
,
1274 m
->u
.m_create_snap
.origin_id
);
1276 case DM_THIN_MESSAGE_CREATE_THIN
:
1277 r
= dm_snprintf(buf
, sizeof(buf
), "create_thin %u",
1278 m
->u
.m_create_thin
.device_id
);
1280 case DM_THIN_MESSAGE_DELETE
:
1281 r
= dm_snprintf(buf
, sizeof(buf
), "delete %u",
1282 m
->u
.m_delete
.device_id
);
1284 case DM_THIN_MESSAGE_TRIM
:
1285 r
= dm_snprintf(buf
, sizeof(buf
), "trim %u %" PRIu64
,
1286 m
->u
.m_trim
.device_id
,
1287 m
->u
.m_trim
.new_size
);
1289 case DM_THIN_MESSAGE_SET_TRANSACTION_ID
:
1290 r
= dm_snprintf(buf
, sizeof(buf
),
1291 "set_transaction_id %" PRIu64
" %" PRIu64
,
1292 m
->u
.m_set_transaction_id
.current_id
,
1293 m
->u
.m_set_transaction_id
.new_id
);
1298 log_error("Failed to prepare message.");
1304 if (!(dmt
= dm_task_create(DM_DEVICE_TARGET_MSG
)))
1307 if (!dm_task_set_major(dmt
, dnode
->info
.major
) ||
1308 !dm_task_set_minor(dmt
, dnode
->info
.minor
)) {
1309 log_error("Failed to set message major minor.");
1313 if (!dm_task_set_message(dmt
, buf
))
1316 /* Internal functionality of dm_task */
1317 dmt
->expected_errno
= tm
->expected_errno
;
1319 if (!dm_task_run(dmt
))
1324 dm_task_destroy(dmt
);
1329 static int _node_send_messages(struct dm_tree_node
*dnode
,
1330 const char *uuid_prefix
,
1331 size_t uuid_prefix_len
)
1333 struct load_segment
*seg
;
1334 struct thin_message
*tmsg
;
1338 if ((dnode
== &dnode
->dtree
->root
) || /* root has props.segs uninitialized */
1339 !dnode
->info
.exists
|| (dm_list_size(&dnode
->props
.segs
) != 1))
1342 seg
= dm_list_item(dm_list_last(&dnode
->props
.segs
), struct load_segment
);
1343 if (seg
->type
!= SEG_THIN_POOL
)
1346 if (!(uuid
= dm_tree_node_get_uuid(dnode
)))
1349 if (!_uuid_prefix_matches(uuid
, uuid_prefix
, uuid_prefix_len
)) {
1350 log_debug("UUID \"%s\" does not match.", uuid
);
1354 if (!_thin_pool_status_transaction_id(dnode
, &trans_id
))
1357 if (trans_id
== dnode
->props
.thin_pool_transaction_id
)
1358 return 1; /* In sync - skip messages */
1360 if (trans_id
!= (dnode
->props
.thin_pool_transaction_id
- 1)) {
1361 log_error("Thin pool transaction_id=%" PRIu64
", while expected: %" PRIu64
".",
1362 trans_id
, dnode
->props
.thin_pool_transaction_id
- 1);
1363 return 0; /* Nothing to send */
1366 dm_list_iterate_items(tmsg
, &seg
->thin_messages
)
1367 if (!(_thin_pool_node_message(dnode
, tmsg
)))
1374 * FIXME Don't attempt to deactivate known internal dependencies.
1376 static int _dm_tree_deactivate_children(struct dm_tree_node
*dnode
,
1377 const char *uuid_prefix
,
1378 size_t uuid_prefix_len
,
1382 void *handle
= NULL
;
1383 struct dm_tree_node
*child
= dnode
;
1384 struct dm_info info
;
1385 const struct dm_info
*dinfo
;
1389 while ((child
= dm_tree_next_child(&handle
, dnode
, 0))) {
1390 if (!(dinfo
= dm_tree_node_get_info(child
))) {
1395 if (!(name
= dm_tree_node_get_name(child
))) {
1400 if (!(uuid
= dm_tree_node_get_uuid(child
))) {
1405 /* Ignore if it doesn't belong to this VG */
1406 if (!_uuid_prefix_matches(uuid
, uuid_prefix
, uuid_prefix_len
))
1409 /* Refresh open_count */
1410 if (!_info_by_dev(dinfo
->major
, dinfo
->minor
, 1, &info
) ||
1414 if (info
.open_count
) {
1415 /* Skip internal non-toplevel opened nodes */
1419 /* When retry is not allowed, error */
1420 if (!child
->dtree
->retry_remove
) {
1421 log_error("Unable to deactivate open %s (%" PRIu32
1422 ":%" PRIu32
")", name
, info
.major
, info
.minor
);
1427 /* Check toplevel node for holders/mounted fs */
1428 if (!_check_device_not_in_use(name
, &info
)) {
1433 /* Go on with retry */
1436 /* Also checking open_count in parent nodes of presuspend_node */
1437 if ((child
->presuspend_node
&&
1438 !_node_has_closed_parents(child
->presuspend_node
,
1439 uuid_prefix
, uuid_prefix_len
))) {
1440 /* Only report error from (likely non-internal) dependency at top level */
1442 log_error("Unable to deactivate open %s (%" PRIu32
1443 ":%" PRIu32
")", name
, info
.major
,
1450 /* Suspend child node first if requested */
1451 if (child
->presuspend_node
&&
1452 !dm_tree_suspend_children(child
, uuid_prefix
, uuid_prefix_len
))
1455 if (!_deactivate_node(name
, info
.major
, info
.minor
,
1456 &child
->dtree
->cookie
, child
->udev_flags
,
1457 (level
== 0) ? child
->dtree
->retry_remove
: 0)) {
1458 log_error("Unable to deactivate %s (%" PRIu32
1459 ":%" PRIu32
")", name
, info
.major
,
1463 } else if (info
.suspended
)
1466 if (dm_tree_node_num_children(child
, 0)) {
1467 if (!_dm_tree_deactivate_children(child
, uuid_prefix
, uuid_prefix_len
, level
+ 1))
1475 int dm_tree_deactivate_children(struct dm_tree_node
*dnode
,
1476 const char *uuid_prefix
,
1477 size_t uuid_prefix_len
)
1479 return _dm_tree_deactivate_children(dnode
, uuid_prefix
, uuid_prefix_len
, 0);
1482 void dm_tree_skip_lockfs(struct dm_tree_node
*dnode
)
1484 dnode
->dtree
->skip_lockfs
= 1;
1487 void dm_tree_use_no_flush_suspend(struct dm_tree_node
*dnode
)
1489 dnode
->dtree
->no_flush
= 1;
1492 void dm_tree_retry_remove(struct dm_tree_node
*dnode
)
1494 dnode
->dtree
->retry_remove
= 1;
1497 int dm_tree_suspend_children(struct dm_tree_node
*dnode
,
1498 const char *uuid_prefix
,
1499 size_t uuid_prefix_len
)
1502 void *handle
= NULL
;
1503 struct dm_tree_node
*child
= dnode
;
1504 struct dm_info info
, newinfo
;
1505 const struct dm_info
*dinfo
;
1509 /* Suspend nodes at this level of the tree */
1510 while ((child
= dm_tree_next_child(&handle
, dnode
, 0))) {
1511 if (!(dinfo
= dm_tree_node_get_info(child
))) {
1516 if (!(name
= dm_tree_node_get_name(child
))) {
1521 if (!(uuid
= dm_tree_node_get_uuid(child
))) {
1526 /* Ignore if it doesn't belong to this VG */
1527 if (!_uuid_prefix_matches(uuid
, uuid_prefix
, uuid_prefix_len
))
1530 /* Ensure immediate parents are already suspended */
1531 if (!_children_suspended(child
, 1, uuid_prefix
, uuid_prefix_len
))
1534 if (!_info_by_dev(dinfo
->major
, dinfo
->minor
, 0, &info
) ||
1535 !info
.exists
|| info
.suspended
)
1538 if (!_suspend_node(name
, info
.major
, info
.minor
,
1539 child
->dtree
->skip_lockfs
,
1540 child
->dtree
->no_flush
, &newinfo
)) {
1541 log_error("Unable to suspend %s (%" PRIu32
1542 ":%" PRIu32
")", name
, info
.major
,
1548 /* Update cached info */
1549 child
->info
= newinfo
;
1552 /* Then suspend any child nodes */
1555 while ((child
= dm_tree_next_child(&handle
, dnode
, 0))) {
1556 if (!(uuid
= dm_tree_node_get_uuid(child
))) {
1561 /* Ignore if it doesn't belong to this VG */
1562 if (!_uuid_prefix_matches(uuid
, uuid_prefix
, uuid_prefix_len
))
1565 if (dm_tree_node_num_children(child
, 0))
1566 if (!dm_tree_suspend_children(child
, uuid_prefix
, uuid_prefix_len
))
1573 int dm_tree_activate_children(struct dm_tree_node
*dnode
,
1574 const char *uuid_prefix
,
1575 size_t uuid_prefix_len
)
1578 void *handle
= NULL
;
1579 struct dm_tree_node
*child
= dnode
;
1580 struct dm_info newinfo
;
1585 /* Activate children first */
1586 while ((child
= dm_tree_next_child(&handle
, dnode
, 0))) {
1587 if (!(uuid
= dm_tree_node_get_uuid(child
))) {
1592 if (!_uuid_prefix_matches(uuid
, uuid_prefix
, uuid_prefix_len
))
1595 if (dm_tree_node_num_children(child
, 0))
1596 if (!dm_tree_activate_children(child
, uuid_prefix
, uuid_prefix_len
))
1602 for (priority
= 0; priority
< 3; priority
++) {
1603 while ((child
= dm_tree_next_child(&handle
, dnode
, 0))) {
1604 if (priority
!= child
->activation_priority
)
1607 if (!(uuid
= dm_tree_node_get_uuid(child
))) {
1612 if (!_uuid_prefix_matches(uuid
, uuid_prefix
, uuid_prefix_len
))
1615 if (!(name
= dm_tree_node_get_name(child
))) {
1621 if (child
->props
.new_name
) {
1622 if (!_rename_node(name
, child
->props
.new_name
, child
->info
.major
,
1623 child
->info
.minor
, &child
->dtree
->cookie
,
1624 child
->udev_flags
)) {
1625 log_error("Failed to rename %s (%" PRIu32
1626 ":%" PRIu32
") to %s", name
, child
->info
.major
,
1627 child
->info
.minor
, child
->props
.new_name
);
1630 child
->name
= child
->props
.new_name
;
1631 child
->props
.new_name
= NULL
;
1634 if (!child
->info
.inactive_table
&& !child
->info
.suspended
)
1637 if (!_resume_node(child
->name
, child
->info
.major
, child
->info
.minor
,
1638 child
->props
.read_ahead
, child
->props
.read_ahead_flags
,
1639 &newinfo
, &child
->dtree
->cookie
, child
->udev_flags
, child
->info
.suspended
)) {
1640 log_error("Unable to resume %s (%" PRIu32
1641 ":%" PRIu32
")", child
->name
, child
->info
.major
,
1647 /* Update cached info */
1648 child
->info
= newinfo
;
1657 static int _create_node(struct dm_tree_node
*dnode
)
1660 struct dm_task
*dmt
;
1662 log_verbose("Creating %s", dnode
->name
);
1664 if (!(dmt
= dm_task_create(DM_DEVICE_CREATE
))) {
1665 log_error("Create dm_task creation failed for %s", dnode
->name
);
1669 if (!dm_task_set_name(dmt
, dnode
->name
)) {
1670 log_error("Failed to set device name for %s", dnode
->name
);
1674 if (!dm_task_set_uuid(dmt
, dnode
->uuid
)) {
1675 log_error("Failed to set uuid for %s", dnode
->name
);
1679 if (dnode
->props
.major
&&
1680 (!dm_task_set_major(dmt
, dnode
->props
.major
) ||
1681 !dm_task_set_minor(dmt
, dnode
->props
.minor
))) {
1682 log_error("Failed to set device number for %s creation.", dnode
->name
);
1686 if (dnode
->props
.read_only
&& !dm_task_set_ro(dmt
)) {
1687 log_error("Failed to set read only flag for %s", dnode
->name
);
1691 if (!dm_task_no_open_count(dmt
))
1692 log_error("Failed to disable open_count");
1694 if ((r
= dm_task_run(dmt
)))
1695 r
= dm_task_get_info(dmt
, &dnode
->info
);
1698 dm_task_destroy(dmt
);
1704 static int _build_dev_string(char *devbuf
, size_t bufsize
, struct dm_tree_node
*node
)
1706 if (!dm_format_dev(devbuf
, bufsize
, node
->info
.major
, node
->info
.minor
)) {
1707 log_error("Failed to format %s device number for %s as dm "
1709 node
->name
, node
->uuid
, node
->info
.major
, node
->info
.minor
);
1716 /* simplify string emiting code */
1717 #define EMIT_PARAMS(p, str...)\
1720 if ((w = dm_snprintf(params + p, paramsize - (size_t) p, str)) < 0) {\
1721 stack; /* Out of space */\
1730 * Returns: 1 on success, 0 on failure
1732 static int _emit_areas_line(struct dm_task
*dmt
__attribute__((unused
)),
1733 struct load_segment
*seg
, char *params
,
1734 size_t paramsize
, int *pos
)
1736 struct seg_area
*area
;
1737 char devbuf
[DM_FORMAT_DEV_BUFSIZE
];
1738 unsigned first_time
= 1;
1739 const char *logtype
, *synctype
;
1740 unsigned log_parm_count
;
1742 dm_list_iterate_items(area
, &seg
->areas
) {
1743 switch (seg
->type
) {
1744 case SEG_REPLICATOR_DEV
:
1745 if (!_build_dev_string(devbuf
, sizeof(devbuf
), area
->dev_node
))
1748 EMIT_PARAMS(*pos
, " %d 1 %s", area
->rsite_index
, devbuf
);
1750 EMIT_PARAMS(*pos
, " nolog 0");
1752 /* Remote devices */
1753 log_parm_count
= (area
->flags
&
1754 (DM_NOSYNC
| DM_FORCESYNC
)) ? 2 : 1;
1757 devbuf
[0] = 0; /* Only core log parameters */
1760 devbuf
[0] = ' '; /* Extra space before device name */
1761 if (!_build_dev_string(devbuf
+ 1,
1766 log_parm_count
++; /* Extra sync log device name parameter */
1769 EMIT_PARAMS(*pos
, " %s %u%s %" PRIu64
, logtype
,
1770 log_parm_count
, devbuf
, area
->region_size
);
1772 synctype
= (area
->flags
& DM_NOSYNC
) ?
1773 " nosync" : (area
->flags
& DM_FORCESYNC
) ?
1777 EMIT_PARAMS(*pos
, "%s", synctype
);
1789 if (!area
->dev_node
) {
1790 EMIT_PARAMS(*pos
, " -");
1793 if (!_build_dev_string(devbuf
, sizeof(devbuf
), area
->dev_node
))
1796 EMIT_PARAMS(*pos
, " %s", devbuf
);
1799 if (!_build_dev_string(devbuf
, sizeof(devbuf
), area
->dev_node
))
1802 EMIT_PARAMS(*pos
, "%s%s %" PRIu64
, first_time
? "" : " ",
1803 devbuf
, area
->offset
);
1812 static int _replicator_emit_segment_line(const struct load_segment
*seg
, char *params
,
1813 size_t paramsize
, int *pos
)
1815 const struct load_segment
*rlog_seg
;
1816 struct replicator_site
*rsite
;
1817 char rlogbuf
[DM_FORMAT_DEV_BUFSIZE
];
1818 unsigned parm_count
;
1820 if (!seg
->log
|| !_build_dev_string(rlogbuf
, sizeof(rlogbuf
), seg
->log
))
1823 rlog_seg
= dm_list_item(dm_list_last(&seg
->log
->props
.segs
),
1824 struct load_segment
);
1826 EMIT_PARAMS(*pos
, "%s 4 %s 0 auto %" PRIu64
,
1827 seg
->rlog_type
, rlogbuf
, rlog_seg
->size
);
1829 dm_list_iterate_items(rsite
, &seg
->rsites
) {
1830 parm_count
= (rsite
->fall_behind_data
1831 || rsite
->fall_behind_ios
1832 || rsite
->async_timeout
) ? 4 : 2;
1834 EMIT_PARAMS(*pos
, " blockdev %u %u %s", parm_count
, rsite
->rsite_index
,
1835 (rsite
->mode
== DM_REPLICATOR_SYNC
) ? "synchronous" : "asynchronous");
1837 if (rsite
->fall_behind_data
)
1838 EMIT_PARAMS(*pos
, " data %" PRIu64
, rsite
->fall_behind_data
);
1839 else if (rsite
->fall_behind_ios
)
1840 EMIT_PARAMS(*pos
, " ios %" PRIu32
, rsite
->fall_behind_ios
);
1841 else if (rsite
->async_timeout
)
1842 EMIT_PARAMS(*pos
, " timeout %" PRIu32
, rsite
->async_timeout
);
1849 * Returns: 1 on success, 0 on failure
1851 static int _mirror_emit_segment_line(struct dm_task
*dmt
, struct load_segment
*seg
,
1852 char *params
, size_t paramsize
)
1854 int block_on_error
= 0;
1855 int handle_errors
= 0;
1856 int dm_log_userspace
= 0;
1858 unsigned log_parm_count
;
1860 char logbuf
[DM_FORMAT_DEV_BUFSIZE
];
1861 const char *logtype
;
1862 unsigned kmaj
= 0, kmin
= 0, krel
= 0;
1864 if (uname(&uts
) == -1) {
1865 log_error("Cannot read kernel release version.");
1869 /* Kernels with a major number of 2 always had 3 parts. */
1870 parts
= sscanf(uts
.release
, "%u.%u.%u", &kmaj
, &kmin
, &krel
);
1871 if (parts
< 1 || (kmaj
< 3 && parts
< 3)) {
1872 log_error("Wrong kernel release version %s.", uts
.release
);
1876 if ((seg
->flags
& DM_BLOCK_ON_ERROR
)) {
1878 * Originally, block_on_error was an argument to the log
1879 * portion of the mirror CTR table. It was renamed to
1880 * "handle_errors" and now resides in the 'features'
1881 * section of the mirror CTR table (i.e. at the end).
1883 * We can identify whether to use "block_on_error" or
1884 * "handle_errors" by the dm-mirror module's version
1885 * number (>= 1.12) or by the kernel version (>= 2.6.22).
1887 if (KERNEL_VERSION(kmaj
, kmin
, krel
) >= KERNEL_VERSION(2, 6, 22))
1893 if (seg
->clustered
) {
1894 /* Cluster mirrors require a UUID */
1899 * Cluster mirrors used to have their own log
1900 * types. Now they are accessed through the
1901 * userspace log type.
1903 * The dm-log-userspace module was added to the
1906 if (KERNEL_VERSION(kmaj
, kmin
, krel
) >= KERNEL_VERSION(2, 6, 31))
1907 dm_log_userspace
= 1;
1913 /* [no]sync, block_on_error etc. */
1914 log_parm_count
+= hweight32(seg
->flags
);
1916 /* "handle_errors" is a feature arg now */
1920 /* DM_CORELOG does not count in the param list */
1921 if (seg
->flags
& DM_CORELOG
)
1924 if (seg
->clustered
) {
1925 log_parm_count
++; /* For UUID */
1927 if (!dm_log_userspace
)
1928 EMIT_PARAMS(pos
, "clustered-");
1930 /* For clustered-* type field inserted later */
1939 if (!_build_dev_string(logbuf
, sizeof(logbuf
), seg
->log
))
1943 if (dm_log_userspace
)
1944 EMIT_PARAMS(pos
, "userspace %u %s clustered-%s",
1945 log_parm_count
, seg
->uuid
, logtype
);
1947 EMIT_PARAMS(pos
, "%s %u", logtype
, log_parm_count
);
1950 EMIT_PARAMS(pos
, " %s", logbuf
);
1952 EMIT_PARAMS(pos
, " %u", seg
->region_size
);
1954 if (seg
->clustered
&& !dm_log_userspace
)
1955 EMIT_PARAMS(pos
, " %s", seg
->uuid
);
1957 if ((seg
->flags
& DM_NOSYNC
))
1958 EMIT_PARAMS(pos
, " nosync");
1959 else if ((seg
->flags
& DM_FORCESYNC
))
1960 EMIT_PARAMS(pos
, " sync");
1963 EMIT_PARAMS(pos
, " block_on_error");
1965 EMIT_PARAMS(pos
, " %u ", seg
->mirror_area_count
);
1967 if (_emit_areas_line(dmt
, seg
, params
, paramsize
, &pos
) <= 0)
1971 EMIT_PARAMS(pos
, " 1 handle_errors");
1976 static int _raid_emit_segment_line(struct dm_task
*dmt
, uint32_t major
,
1977 uint32_t minor
, struct load_segment
*seg
,
1978 uint64_t *seg_start
, char *params
,
1982 int param_count
= 1; /* mandatory 'chunk size'/'stripe size' arg */
1985 if ((seg
->flags
& DM_NOSYNC
) || (seg
->flags
& DM_FORCESYNC
))
1988 if (seg
->region_size
)
1991 /* rebuilds is 64-bit */
1992 param_count
+= 2 * hweight32(seg
->rebuilds
& 0xFFFFFFFF);
1993 param_count
+= 2 * hweight32(seg
->rebuilds
>> 32);
1995 if ((seg
->type
== SEG_RAID1
) && seg
->stripe_size
)
1996 log_error("WARNING: Ignoring RAID1 stripe size");
1998 EMIT_PARAMS(pos
, "%s %d %u", dm_segtypes
[seg
->type
].target
,
1999 param_count
, seg
->stripe_size
);
2001 if (seg
->flags
& DM_NOSYNC
)
2002 EMIT_PARAMS(pos
, " nosync");
2003 else if (seg
->flags
& DM_FORCESYNC
)
2004 EMIT_PARAMS(pos
, " sync");
2006 if (seg
->region_size
)
2007 EMIT_PARAMS(pos
, " region_size %u", seg
->region_size
);
2009 for (i
= 0; i
< (seg
->area_count
/ 2); i
++)
2010 if (seg
->rebuilds
& (1 << i
))
2011 EMIT_PARAMS(pos
, " rebuild %u", i
);
2013 /* Print number of metadata/data device pairs */
2014 EMIT_PARAMS(pos
, " %u", seg
->area_count
/2);
2016 if (_emit_areas_line(dmt
, seg
, params
, paramsize
, &pos
) <= 0)
2022 static int _emit_segment_line(struct dm_task
*dmt
, uint32_t major
,
2023 uint32_t minor
, struct load_segment
*seg
,
2024 uint64_t *seg_start
, char *params
,
2029 int target_type_is_raid
= 0;
2030 char originbuf
[DM_FORMAT_DEV_BUFSIZE
], cowbuf
[DM_FORMAT_DEV_BUFSIZE
];
2031 char pool
[DM_FORMAT_DEV_BUFSIZE
], metadata
[DM_FORMAT_DEV_BUFSIZE
];
2039 /* Mirrors are pretty complicated - now in separate function */
2040 r
= _mirror_emit_segment_line(dmt
, seg
, params
, paramsize
);
2044 case SEG_REPLICATOR
:
2045 if ((r
= _replicator_emit_segment_line(seg
, params
, paramsize
,
2051 case SEG_REPLICATOR_DEV
:
2052 if (!seg
->replicator
|| !_build_dev_string(originbuf
,
2057 EMIT_PARAMS(pos
, "%s %" PRIu64
, originbuf
, seg
->rdevice_index
);
2060 case SEG_SNAPSHOT_MERGE
:
2061 if (!_build_dev_string(originbuf
, sizeof(originbuf
), seg
->origin
))
2063 if (!_build_dev_string(cowbuf
, sizeof(cowbuf
), seg
->cow
))
2065 EMIT_PARAMS(pos
, "%s %s %c %d", originbuf
, cowbuf
,
2066 seg
->persistent
? 'P' : 'N', seg
->chunk_size
);
2068 case SEG_SNAPSHOT_ORIGIN
:
2069 if (!_build_dev_string(originbuf
, sizeof(originbuf
), seg
->origin
))
2071 EMIT_PARAMS(pos
, "%s", originbuf
);
2074 EMIT_PARAMS(pos
, "%u %u ", seg
->area_count
, seg
->stripe_size
);
2077 EMIT_PARAMS(pos
, "%s%s%s%s%s %s %" PRIu64
" ", seg
->cipher
,
2078 seg
->chainmode
? "-" : "", seg
->chainmode
?: "",
2079 seg
->iv
? "-" : "", seg
->iv
?: "", seg
->key
,
2080 seg
->iv_offset
!= DM_CRYPT_IV_DEFAULT
?
2081 seg
->iv_offset
: *seg_start
);
2092 target_type_is_raid
= 1;
2093 r
= _raid_emit_segment_line(dmt
, major
, minor
, seg
, seg_start
,
2100 if (!_build_dev_string(metadata
, sizeof(metadata
), seg
->metadata
))
2102 if (!_build_dev_string(pool
, sizeof(pool
), seg
->pool
))
2104 EMIT_PARAMS(pos
, "%s %s %d %" PRIu64
" %s", metadata
, pool
,
2105 seg
->data_block_size
, seg
->low_water_mark
,
2106 seg
->skip_block_zeroing
? "1 skip_block_zeroing" : "0");
2109 if (!_build_dev_string(pool
, sizeof(pool
), seg
->pool
))
2111 EMIT_PARAMS(pos
, "%s %d", pool
, seg
->device_id
);
2117 case SEG_REPLICATOR
:
2119 case SEG_SNAPSHOT_ORIGIN
:
2120 case SEG_SNAPSHOT_MERGE
:
2127 case SEG_REPLICATOR_DEV
:
2129 if ((r
= _emit_areas_line(dmt
, seg
, params
, paramsize
, &pos
)) <= 0) {
2134 log_error("No parameters supplied for %s target "
2135 "%u:%u.", dm_segtypes
[seg
->type
].target
,
2142 log_debug("Adding target to (%" PRIu32
":%" PRIu32
"): %" PRIu64
2143 " %" PRIu64
" %s %s", major
, minor
,
2144 *seg_start
, seg
->size
, target_type_is_raid
? "raid" :
2145 dm_segtypes
[seg
->type
].target
, params
);
2147 if (!dm_task_add_target(dmt
, *seg_start
, seg
->size
,
2148 target_type_is_raid
? "raid" :
2149 dm_segtypes
[seg
->type
].target
, params
))
2152 *seg_start
+= seg
->size
;
2159 static int _emit_segment(struct dm_task
*dmt
, uint32_t major
, uint32_t minor
,
2160 struct load_segment
*seg
, uint64_t *seg_start
)
2163 size_t paramsize
= 4096;
2167 if (!(params
= dm_malloc(paramsize
))) {
2168 log_error("Insufficient space for target parameters.");
2173 ret
= _emit_segment_line(dmt
, major
, minor
, seg
, seg_start
,
2183 log_debug("Insufficient space in params[%" PRIsize_t
2184 "] for target parameters.", paramsize
);
2187 } while (paramsize
< MAX_TARGET_PARAMSIZE
);
2189 log_error("Target parameter size too big. Aborting.");
2193 static int _load_node(struct dm_tree_node
*dnode
)
2196 struct dm_task
*dmt
;
2197 struct load_segment
*seg
;
2198 uint64_t seg_start
= 0, existing_table_size
;
2200 log_verbose("Loading %s table (%" PRIu32
":%" PRIu32
")", dnode
->name
,
2201 dnode
->info
.major
, dnode
->info
.minor
);
2203 if (!(dmt
= dm_task_create(DM_DEVICE_RELOAD
))) {
2204 log_error("Reload dm_task creation failed for %s", dnode
->name
);
2208 if (!dm_task_set_major(dmt
, dnode
->info
.major
) ||
2209 !dm_task_set_minor(dmt
, dnode
->info
.minor
)) {
2210 log_error("Failed to set device number for %s reload.", dnode
->name
);
2214 if (dnode
->props
.read_only
&& !dm_task_set_ro(dmt
)) {
2215 log_error("Failed to set read only flag for %s", dnode
->name
);
2219 if (!dm_task_no_open_count(dmt
))
2220 log_error("Failed to disable open_count");
2222 dm_list_iterate_items(seg
, &dnode
->props
.segs
)
2223 if (!_emit_segment(dmt
, dnode
->info
.major
, dnode
->info
.minor
,
2227 if (!dm_task_suppress_identical_reload(dmt
))
2228 log_error("Failed to suppress reload of identical tables.");
2230 if ((r
= dm_task_run(dmt
))) {
2231 r
= dm_task_get_info(dmt
, &dnode
->info
);
2232 if (r
&& !dnode
->info
.inactive_table
)
2233 log_verbose("Suppressed %s identical table reload.",
2236 existing_table_size
= dm_task_get_existing_table_size(dmt
);
2237 if ((dnode
->props
.size_changed
=
2238 (existing_table_size
== seg_start
) ? 0 : 1)) {
2239 log_debug("Table size changed from %" PRIu64
" to %"
2240 PRIu64
" for %s", existing_table_size
,
2241 seg_start
, dnode
->name
);
2243 * Kernel usually skips size validation on zero-length devices
2244 * now so no need to preload them.
2246 /* FIXME In which kernel version did this begin? */
2247 if (!existing_table_size
&& dnode
->props
.delay_resume_if_new
)
2248 dnode
->props
.size_changed
= 0;
2252 dnode
->props
.segment_count
= 0;
2255 dm_task_destroy(dmt
);
2260 int dm_tree_preload_children(struct dm_tree_node
*dnode
,
2261 const char *uuid_prefix
,
2262 size_t uuid_prefix_len
)
2265 void *handle
= NULL
;
2266 struct dm_tree_node
*child
;
2267 struct dm_info newinfo
;
2268 int update_devs_flag
= 0;
2270 /* Preload children first */
2271 while ((child
= dm_tree_next_child(&handle
, dnode
, 0))) {
2272 /* Skip existing non-device-mapper devices */
2273 if (!child
->info
.exists
&& child
->info
.major
)
2276 /* Ignore if it doesn't belong to this VG */
2277 if (child
->info
.exists
&&
2278 !_uuid_prefix_matches(child
->uuid
, uuid_prefix
, uuid_prefix_len
))
2281 if (dm_tree_node_num_children(child
, 0))
2282 if (!dm_tree_preload_children(child
, uuid_prefix
, uuid_prefix_len
))
2285 /* FIXME Cope if name exists with no uuid? */
2286 if (!child
->info
.exists
&& !_create_node(child
))
2289 if (!child
->info
.inactive_table
&&
2290 child
->props
.segment_count
&&
2294 /* Propagate device size change change */
2295 if (child
->props
.size_changed
)
2296 dnode
->props
.size_changed
= 1;
2298 /* Resume device immediately if it has parents and its size changed */
2299 if (!dm_tree_node_num_children(child
, 1) || !child
->props
.size_changed
)
2302 if (!child
->info
.inactive_table
&& !child
->info
.suspended
)
2305 if (!_resume_node(child
->name
, child
->info
.major
, child
->info
.minor
,
2306 child
->props
.read_ahead
, child
->props
.read_ahead_flags
,
2307 &newinfo
, &child
->dtree
->cookie
, child
->udev_flags
,
2308 child
->info
.suspended
)) {
2309 log_error("Unable to resume %s (%" PRIu32
2310 ":%" PRIu32
")", child
->name
, child
->info
.major
,
2316 /* Update cached info */
2317 child
->info
= newinfo
;
2320 * Prepare for immediate synchronization with udev and flush all stacked
2321 * dev node operations if requested by immediate_dev_node property. But
2322 * finish processing current level in the tree first.
2324 if (child
->props
.immediate_dev_node
)
2325 update_devs_flag
= 1;
2330 if (update_devs_flag
) {
2331 if (!dm_udev_wait(dm_tree_get_cookie(dnode
)))
2333 dm_tree_set_cookie(dnode
, 0);
2336 if (r
&& !_node_send_messages(dnode
, uuid_prefix
, uuid_prefix_len
)) {
2338 if (!(dm_tree_deactivate_children(dnode
, uuid_prefix
, uuid_prefix_len
)))
2339 log_error("Failed to deactivate %s", dnode
->name
);
2347 * Returns 1 if unsure.
2349 int dm_tree_children_use_uuid(struct dm_tree_node
*dnode
,
2350 const char *uuid_prefix
,
2351 size_t uuid_prefix_len
)
2353 void *handle
= NULL
;
2354 struct dm_tree_node
*child
= dnode
;
2357 while ((child
= dm_tree_next_child(&handle
, dnode
, 0))) {
2358 if (!(uuid
= dm_tree_node_get_uuid(child
))) {
2359 log_error("Failed to get uuid for dtree node.");
2363 if (_uuid_prefix_matches(uuid
, uuid_prefix
, uuid_prefix_len
))
2366 if (dm_tree_node_num_children(child
, 0))
2367 dm_tree_children_use_uuid(child
, uuid_prefix
, uuid_prefix_len
);
2376 static struct load_segment
*_add_segment(struct dm_tree_node
*dnode
, unsigned type
, uint64_t size
)
2378 struct load_segment
*seg
;
2380 if (!(seg
= dm_pool_zalloc(dnode
->dtree
->mem
, sizeof(*seg
)))) {
2381 log_error("dtree node segment allocation failed");
2387 seg
->area_count
= 0;
2388 dm_list_init(&seg
->areas
);
2389 seg
->stripe_size
= 0;
2390 seg
->persistent
= 0;
2391 seg
->chunk_size
= 0;
2396 dm_list_add(&dnode
->props
.segs
, &seg
->list
);
2397 dnode
->props
.segment_count
++;
2402 int dm_tree_node_add_snapshot_origin_target(struct dm_tree_node
*dnode
,
2404 const char *origin_uuid
)
2406 struct load_segment
*seg
;
2407 struct dm_tree_node
*origin_node
;
2409 if (!(seg
= _add_segment(dnode
, SEG_SNAPSHOT_ORIGIN
, size
)))
2412 if (!(origin_node
= dm_tree_find_node_by_uuid(dnode
->dtree
, origin_uuid
))) {
2413 log_error("Couldn't find snapshot origin uuid %s.", origin_uuid
);
2417 seg
->origin
= origin_node
;
2418 if (!_link_tree_nodes(dnode
, origin_node
))
2421 /* Resume snapshot origins after new snapshots */
2422 dnode
->activation_priority
= 1;
2427 static int _add_snapshot_target(struct dm_tree_node
*node
,
2429 const char *origin_uuid
,
2430 const char *cow_uuid
,
2431 const char *merge_uuid
,
2433 uint32_t chunk_size
)
2435 struct load_segment
*seg
;
2436 struct dm_tree_node
*origin_node
, *cow_node
, *merge_node
;
2439 seg_type
= !merge_uuid
? SEG_SNAPSHOT
: SEG_SNAPSHOT_MERGE
;
2441 if (!(seg
= _add_segment(node
, seg_type
, size
)))
2444 if (!(origin_node
= dm_tree_find_node_by_uuid(node
->dtree
, origin_uuid
))) {
2445 log_error("Couldn't find snapshot origin uuid %s.", origin_uuid
);
2449 seg
->origin
= origin_node
;
2450 if (!_link_tree_nodes(node
, origin_node
))
2453 if (!(cow_node
= dm_tree_find_node_by_uuid(node
->dtree
, cow_uuid
))) {
2454 log_error("Couldn't find snapshot COW device uuid %s.", cow_uuid
);
2458 seg
->cow
= cow_node
;
2459 if (!_link_tree_nodes(node
, cow_node
))
2462 seg
->persistent
= persistent
? 1 : 0;
2463 seg
->chunk_size
= chunk_size
;
2466 if (!(merge_node
= dm_tree_find_node_by_uuid(node
->dtree
, merge_uuid
))) {
2467 /* not a pure error, merging snapshot may have been deactivated */
2468 log_verbose("Couldn't find merging snapshot uuid %s.", merge_uuid
);
2470 seg
->merge
= merge_node
;
2471 /* must not link merging snapshot, would undermine activation_priority below */
2474 /* Resume snapshot-merge (acting origin) after other snapshots */
2475 node
->activation_priority
= 1;
2477 /* Resume merging snapshot after snapshot-merge */
2478 seg
->merge
->activation_priority
= 2;
2486 int dm_tree_node_add_snapshot_target(struct dm_tree_node
*node
,
2488 const char *origin_uuid
,
2489 const char *cow_uuid
,
2491 uint32_t chunk_size
)
2493 return _add_snapshot_target(node
, size
, origin_uuid
, cow_uuid
,
2494 NULL
, persistent
, chunk_size
);
2497 int dm_tree_node_add_snapshot_merge_target(struct dm_tree_node
*node
,
2499 const char *origin_uuid
,
2500 const char *cow_uuid
,
2501 const char *merge_uuid
,
2502 uint32_t chunk_size
)
2504 return _add_snapshot_target(node
, size
, origin_uuid
, cow_uuid
,
2505 merge_uuid
, 1, chunk_size
);
2508 int dm_tree_node_add_error_target(struct dm_tree_node
*node
,
2511 if (!_add_segment(node
, SEG_ERROR
, size
))
2517 int dm_tree_node_add_zero_target(struct dm_tree_node
*node
,
2520 if (!_add_segment(node
, SEG_ZERO
, size
))
2526 int dm_tree_node_add_linear_target(struct dm_tree_node
*node
,
2529 if (!_add_segment(node
, SEG_LINEAR
, size
))
2535 int dm_tree_node_add_striped_target(struct dm_tree_node
*node
,
2537 uint32_t stripe_size
)
2539 struct load_segment
*seg
;
2541 if (!(seg
= _add_segment(node
, SEG_STRIPED
, size
)))
2544 seg
->stripe_size
= stripe_size
;
2549 int dm_tree_node_add_crypt_target(struct dm_tree_node
*node
,
2552 const char *chainmode
,
2557 struct load_segment
*seg
;
2559 if (!(seg
= _add_segment(node
, SEG_CRYPT
, size
)))
2562 seg
->cipher
= cipher
;
2563 seg
->chainmode
= chainmode
;
2565 seg
->iv_offset
= iv_offset
;
2571 int dm_tree_node_add_mirror_target_log(struct dm_tree_node
*node
,
2572 uint32_t region_size
,
2574 const char *log_uuid
,
2575 unsigned area_count
,
2578 struct dm_tree_node
*log_node
= NULL
;
2579 struct load_segment
*seg
;
2581 if (!node
->props
.segment_count
) {
2582 log_error(INTERNAL_ERROR
"Attempt to add target area to missing segment.");
2586 seg
= dm_list_item(dm_list_last(&node
->props
.segs
), struct load_segment
);
2589 if (!(seg
->uuid
= dm_pool_strdup(node
->dtree
->mem
, log_uuid
))) {
2590 log_error("log uuid pool_strdup failed");
2593 if ((flags
& DM_CORELOG
))
2594 /* For pvmove: immediate resume (for size validation) isn't needed. */
2595 node
->props
.delay_resume_if_new
= 1;
2597 if (!(log_node
= dm_tree_find_node_by_uuid(node
->dtree
, log_uuid
))) {
2598 log_error("Couldn't find mirror log uuid %s.", log_uuid
);
2603 log_node
->props
.immediate_dev_node
= 1;
2605 /* The kernel validates the size of disk logs. */
2606 /* FIXME Propagate to any devices below */
2607 log_node
->props
.delay_resume_if_new
= 0;
2609 if (!_link_tree_nodes(node
, log_node
))
2614 seg
->log
= log_node
;
2615 seg
->region_size
= region_size
;
2616 seg
->clustered
= clustered
;
2617 seg
->mirror_area_count
= area_count
;
2623 int dm_tree_node_add_mirror_target(struct dm_tree_node
*node
,
2626 if (!_add_segment(node
, SEG_MIRRORED
, size
))
2632 int dm_tree_node_add_raid_target(struct dm_tree_node
*node
,
2634 const char *raid_type
,
2635 uint32_t region_size
,
2636 uint32_t stripe_size
,
2641 struct load_segment
*seg
= NULL
;
2643 for (i
= 0; dm_segtypes
[i
].target
&& !seg
; i
++)
2644 if (!strcmp(raid_type
, dm_segtypes
[i
].target
))
2645 if (!(seg
= _add_segment(node
,
2646 dm_segtypes
[i
].type
, size
)))
2652 seg
->region_size
= region_size
;
2653 seg
->stripe_size
= stripe_size
;
2654 seg
->area_count
= 0;
2655 seg
->rebuilds
= rebuilds
;
2660 int dm_tree_node_add_replicator_target(struct dm_tree_node
*node
,
2662 const char *rlog_uuid
,
2663 const char *rlog_type
,
2664 unsigned rsite_index
,
2665 dm_replicator_mode_t mode
,
2666 uint32_t async_timeout
,
2667 uint64_t fall_behind_data
,
2668 uint32_t fall_behind_ios
)
2670 struct load_segment
*rseg
;
2671 struct replicator_site
*rsite
;
2673 /* Local site0 - adds replicator segment and links rlog device */
2674 if (rsite_index
== REPLICATOR_LOCAL_SITE
) {
2675 if (node
->props
.segment_count
) {
2676 log_error(INTERNAL_ERROR
"Attempt to add replicator segment to already used node.");
2680 if (!(rseg
= _add_segment(node
, SEG_REPLICATOR
, size
)))
2683 if (!(rseg
->log
= dm_tree_find_node_by_uuid(node
->dtree
, rlog_uuid
))) {
2684 log_error("Missing replicator log uuid %s.", rlog_uuid
);
2688 if (!_link_tree_nodes(node
, rseg
->log
))
2691 if (strcmp(rlog_type
, "ringbuffer") != 0) {
2692 log_error("Unsupported replicator log type %s.", rlog_type
);
2696 if (!(rseg
->rlog_type
= dm_pool_strdup(node
->dtree
->mem
, rlog_type
)))
2699 dm_list_init(&rseg
->rsites
);
2700 rseg
->rdevice_count
= 0;
2701 node
->activation_priority
= 1;
2704 /* Add site to segment */
2705 if (mode
== DM_REPLICATOR_SYNC
2706 && (async_timeout
|| fall_behind_ios
|| fall_behind_data
)) {
2707 log_error("Async parameters passed for synchronnous replicator.");
2711 if (node
->props
.segment_count
!= 1) {
2712 log_error(INTERNAL_ERROR
"Attempt to add remote site area before setting replicator log.");
2716 rseg
= dm_list_item(dm_list_last(&node
->props
.segs
), struct load_segment
);
2717 if (rseg
->type
!= SEG_REPLICATOR
) {
2718 log_error(INTERNAL_ERROR
"Attempt to use non replicator segment %s.",
2719 dm_segtypes
[rseg
->type
].target
);
2723 if (!(rsite
= dm_pool_zalloc(node
->dtree
->mem
, sizeof(*rsite
)))) {
2724 log_error("Failed to allocate remote site segment.");
2728 dm_list_add(&rseg
->rsites
, &rsite
->list
);
2729 rseg
->rsite_count
++;
2732 rsite
->async_timeout
= async_timeout
;
2733 rsite
->fall_behind_data
= fall_behind_data
;
2734 rsite
->fall_behind_ios
= fall_behind_ios
;
2735 rsite
->rsite_index
= rsite_index
;
2740 /* Appends device node to Replicator */
2741 int dm_tree_node_add_replicator_dev_target(struct dm_tree_node
*node
,
2743 const char *replicator_uuid
,
2744 uint64_t rdevice_index
,
2745 const char *rdev_uuid
,
2746 unsigned rsite_index
,
2747 const char *slog_uuid
,
2748 uint32_t slog_flags
,
2749 uint32_t slog_region_size
)
2751 struct seg_area
*area
;
2752 struct load_segment
*rseg
;
2753 struct load_segment
*rep_seg
;
2755 if (rsite_index
== REPLICATOR_LOCAL_SITE
) {
2756 /* Site index for local target */
2757 if (!(rseg
= _add_segment(node
, SEG_REPLICATOR_DEV
, size
)))
2760 if (!(rseg
->replicator
= dm_tree_find_node_by_uuid(node
->dtree
, replicator_uuid
))) {
2761 log_error("Missing replicator uuid %s.", replicator_uuid
);
2765 /* Local slink0 for replicator must be always initialized first */
2766 if (rseg
->replicator
->props
.segment_count
!= 1) {
2767 log_error(INTERNAL_ERROR
"Attempt to use non replicator segment.");
2771 rep_seg
= dm_list_item(dm_list_last(&rseg
->replicator
->props
.segs
), struct load_segment
);
2772 if (rep_seg
->type
!= SEG_REPLICATOR
) {
2773 log_error(INTERNAL_ERROR
"Attempt to use non replicator segment %s.",
2774 dm_segtypes
[rep_seg
->type
].target
);
2777 rep_seg
->rdevice_count
++;
2779 if (!_link_tree_nodes(node
, rseg
->replicator
))
2782 rseg
->rdevice_index
= rdevice_index
;
2784 /* Local slink0 for replicator must be always initialized first */
2785 if (node
->props
.segment_count
!= 1) {
2786 log_error(INTERNAL_ERROR
"Attempt to use non replicator-dev segment.");
2790 rseg
= dm_list_item(dm_list_last(&node
->props
.segs
), struct load_segment
);
2791 if (rseg
->type
!= SEG_REPLICATOR_DEV
) {
2792 log_error(INTERNAL_ERROR
"Attempt to use non replicator-dev segment %s.",
2793 dm_segtypes
[rseg
->type
].target
);
2798 if (!(slog_flags
& DM_CORELOG
) && !slog_uuid
) {
2799 log_error("Unspecified sync log uuid.");
2803 if (!dm_tree_node_add_target_area(node
, NULL
, rdev_uuid
, 0))
2806 area
= dm_list_item(dm_list_last(&rseg
->areas
), struct seg_area
);
2808 if (!(slog_flags
& DM_CORELOG
)) {
2809 if (!(area
->slog
= dm_tree_find_node_by_uuid(node
->dtree
, slog_uuid
))) {
2810 log_error("Couldn't find sync log uuid %s.", slog_uuid
);
2814 if (!_link_tree_nodes(node
, area
->slog
))
2818 area
->flags
= slog_flags
;
2819 area
->region_size
= slog_region_size
;
2820 area
->rsite_index
= rsite_index
;
2825 static int _thin_validate_device_id(uint32_t device_id
)
2827 if (device_id
> DM_THIN_MAX_DEVICE_ID
) {
2828 log_error("Device id %u is higher then %u.",
2829 device_id
, DM_THIN_MAX_DEVICE_ID
);
2836 int dm_tree_node_add_thin_pool_target(struct dm_tree_node
*node
,
2838 uint64_t transaction_id
,
2839 const char *metadata_uuid
,
2840 const char *pool_uuid
,
2841 uint32_t data_block_size
,
2842 uint64_t low_water_mark
,
2843 unsigned skip_block_zeroing
)
2845 struct load_segment
*seg
;
2847 if (data_block_size
< DM_THIN_MIN_DATA_BLOCK_SIZE
) {
2848 log_error("Data block size %u is lower then %u sectors.",
2849 data_block_size
, DM_THIN_MIN_DATA_BLOCK_SIZE
);
2853 if (data_block_size
> DM_THIN_MAX_DATA_BLOCK_SIZE
) {
2854 log_error("Data block size %u is higher then %u sectors.",
2855 data_block_size
, DM_THIN_MAX_DATA_BLOCK_SIZE
);
2859 if (!(seg
= _add_segment(node
, SEG_THIN_POOL
, size
)))
2862 if (!(seg
->metadata
= dm_tree_find_node_by_uuid(node
->dtree
, metadata_uuid
))) {
2863 log_error("Missing metadata uuid %s.", metadata_uuid
);
2867 if (!_link_tree_nodes(node
, seg
->metadata
))
2870 if (!(seg
->pool
= dm_tree_find_node_by_uuid(node
->dtree
, pool_uuid
))) {
2871 log_error("Missing pool uuid %s.", pool_uuid
);
2875 if (!_link_tree_nodes(node
, seg
->pool
))
2878 node
->props
.thin_pool_transaction_id
= transaction_id
; // compare on resume
2879 seg
->low_water_mark
= low_water_mark
;
2880 seg
->data_block_size
= data_block_size
;
2881 seg
->skip_block_zeroing
= skip_block_zeroing
;
2882 dm_list_init(&seg
->thin_messages
);
2887 int dm_tree_node_add_thin_pool_message(struct dm_tree_node
*node
,
2888 const struct dm_thin_message
*message
)
2890 struct load_segment
*seg
;
2891 struct thin_message
*tm
;
2893 if (node
->props
.segment_count
!= 1) {
2894 log_error("Thin pool node must have only one segment.");
2898 seg
= dm_list_item(dm_list_last(&node
->props
.segs
), struct load_segment
);
2899 if (seg
->type
!= SEG_THIN_POOL
) {
2900 log_error("Thin pool node has segment type %s.",
2901 dm_segtypes
[seg
->type
].target
);
2905 if (!(tm
= dm_pool_zalloc(node
->dtree
->mem
, sizeof (*tm
)))) {
2906 log_error("Failed to allocate thin message.");
2910 switch (message
->type
) {
2911 case DM_THIN_MESSAGE_CREATE_SNAP
:
2912 /* If the thin origin is active, it must be suspend first! */
2913 if (message
->u
.m_create_snap
.device_id
== message
->u
.m_create_snap
.origin_id
) {
2914 log_error("Cannot use same device id for origin and its snapshot.");
2917 if (!_thin_validate_device_id(message
->u
.m_create_snap
.device_id
) ||
2918 !_thin_validate_device_id(message
->u
.m_create_snap
.origin_id
))
2920 tm
->message
.u
.m_create_snap
= message
->u
.m_create_snap
;
2922 case DM_THIN_MESSAGE_CREATE_THIN
:
2923 if (!_thin_validate_device_id(message
->u
.m_create_thin
.device_id
))
2925 tm
->message
.u
.m_create_thin
= message
->u
.m_create_thin
;
2926 tm
->expected_errno
= EEXIST
;
2928 case DM_THIN_MESSAGE_DELETE
:
2929 if (!_thin_validate_device_id(message
->u
.m_delete
.device_id
))
2931 tm
->message
.u
.m_delete
= message
->u
.m_delete
;
2932 tm
->expected_errno
= ENODATA
;
2934 case DM_THIN_MESSAGE_TRIM
:
2935 if (!_thin_validate_device_id(message
->u
.m_trim
.device_id
))
2937 tm
->message
.u
.m_trim
= message
->u
.m_trim
;
2939 case DM_THIN_MESSAGE_SET_TRANSACTION_ID
:
2940 if (message
->u
.m_set_transaction_id
.current_id
!=
2941 (message
->u
.m_set_transaction_id
.new_id
- 1)) {
2942 log_error("New transaction_id must be sequential.");
2943 return 0; /* FIXME: Maybe too strict here? */
2945 tm
->message
.u
.m_set_transaction_id
= message
->u
.m_set_transaction_id
;
2948 log_error("Unsupported message type %d.", (int) message
->type
);
2952 tm
->message
.type
= message
->type
;
2953 dm_list_add(&seg
->thin_messages
, &tm
->list
);
2958 int dm_tree_node_add_thin_target(struct dm_tree_node
*node
,
2960 const char *thin_pool_uuid
,
2963 struct load_segment
*seg
;
2965 if (!_thin_validate_device_id(device_id
))
2968 if (!(seg
= _add_segment(node
, SEG_THIN
, size
)))
2971 if (!(seg
->pool
= dm_tree_find_node_by_uuid(node
->dtree
, thin_pool_uuid
))) {
2972 log_error("Missing thin pool uuid %s.", thin_pool_uuid
);
2976 if (!_link_tree_nodes(node
, seg
->pool
))
2979 seg
->device_id
= device_id
;
2984 static int _add_area(struct dm_tree_node
*node
, struct load_segment
*seg
, struct dm_tree_node
*dev_node
, uint64_t offset
)
2986 struct seg_area
*area
;
2988 if (!(area
= dm_pool_zalloc(node
->dtree
->mem
, sizeof (*area
)))) {
2989 log_error("Failed to allocate target segment area.");
2993 area
->dev_node
= dev_node
;
2994 area
->offset
= offset
;
2996 dm_list_add(&seg
->areas
, &area
->list
);
3002 int dm_tree_node_add_target_area(struct dm_tree_node
*node
,
3003 const char *dev_name
,
3007 struct load_segment
*seg
;
3009 struct dm_tree_node
*dev_node
;
3011 if ((!dev_name
|| !*dev_name
) && (!uuid
|| !*uuid
)) {
3012 log_error("dm_tree_node_add_target_area called without device");
3017 if (!(dev_node
= dm_tree_find_node_by_uuid(node
->dtree
, uuid
))) {
3018 log_error("Couldn't find area uuid %s.", uuid
);
3021 if (!_link_tree_nodes(node
, dev_node
))
3024 if (stat(dev_name
, &info
) < 0) {
3025 log_error("Device %s not found.", dev_name
);
3029 if (!S_ISBLK(info
.st_mode
)) {
3030 log_error("Device %s is not a block device.", dev_name
);
3034 /* FIXME Check correct macro use */
3035 if (!(dev_node
= _add_dev(node
->dtree
, node
, MAJOR(info
.st_rdev
),
3036 MINOR(info
.st_rdev
), 0)))
3040 if (!node
->props
.segment_count
) {
3041 log_error(INTERNAL_ERROR
"Attempt to add target area to missing segment.");
3045 seg
= dm_list_item(dm_list_last(&node
->props
.segs
), struct load_segment
);
3047 if (!_add_area(node
, seg
, dev_node
, offset
))
3053 int dm_tree_node_add_null_area(struct dm_tree_node
*node
, uint64_t offset
)
3055 struct load_segment
*seg
;
3057 seg
= dm_list_item(dm_list_last(&node
->props
.segs
), struct load_segment
);
3059 switch (seg
->type
) {
3071 log_error("dm_tree_node_add_null_area() called on an unsupported segment type");
3075 if (!_add_area(node
, seg
, NULL
, offset
))
3081 void dm_tree_set_cookie(struct dm_tree_node
*node
, uint32_t cookie
)
3083 node
->dtree
->cookie
= cookie
;
3086 uint32_t dm_tree_get_cookie(struct dm_tree_node
*node
)
3088 return node
->dtree
->cookie
;