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mirror: add prepare_mirror_log

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Function prepares new mirror log LV in-sync optionaly.
This is useful to have such device ready when converting
raid1 to mirror.
This commit is contained in:
Zdenek Kabelac 2016-12-10 19:54:09 +01:00
parent b9f9ce52ec
commit 31564834db
3 changed files with 48 additions and 0 deletions
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1
WHATS_NEW
View File

@ -1,5 +1,6 @@
Version 2.02.169 - Version 2.02.169 -
===================================== =====================================
Add internal function for separate mirror log preparation.
Fix segfault in lvmetad from missing NULL in daemon_reply_simple. Fix segfault in lvmetad from missing NULL in daemon_reply_simple.
Simplify internal _info_run() and use _setup_task_run() for mknod. Simplify internal _info_run() and use _setup_task_run() for mknod.
Better API for internal function _setup_task_run. Better API for internal function _setup_task_run.

4
lib/metadata/metadata-exported.h
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@ -1157,6 +1157,10 @@ struct logical_volume *detach_mirror_log(struct lv_segment *seg);
int attach_mirror_log(struct lv_segment *seg, struct logical_volume *lv); int attach_mirror_log(struct lv_segment *seg, struct logical_volume *lv);
int remove_mirror_log(struct cmd_context *cmd, struct logical_volume *lv, int remove_mirror_log(struct cmd_context *cmd, struct logical_volume *lv,
struct dm_list *removable_pvs, int force); struct dm_list *removable_pvs, int force);
struct logical_volume *prepare_mirror_log(struct logical_volume *lv,
int in_sync, uint32_t region_size,
struct dm_list *allocatable_pvs,
alloc_policy_t alloc);
int add_mirror_log(struct cmd_context *cmd, struct logical_volume *lv, int add_mirror_log(struct cmd_context *cmd, struct logical_volume *lv,
uint32_t log_count, uint32_t region_size, uint32_t log_count, uint32_t region_size,
struct dm_list *allocatable_pvs, alloc_policy_t alloc); struct dm_list *allocatable_pvs, alloc_policy_t alloc);

43
lib/metadata/mirror.c
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@ -1912,6 +1912,49 @@ int attach_mirror_log(struct lv_segment *seg, struct logical_volume *log_lv)
return add_seg_to_segs_using_this_lv(log_lv, seg); return add_seg_to_segs_using_this_lv(log_lv, seg);
} }
/* Prepare disk mirror log for raid1->mirror conversion */
struct logical_volume *prepare_mirror_log(struct logical_volume *lv,
int in_sync, uint32_t region_size,
struct dm_list *allocatable_pvs,
alloc_policy_t alloc)
{
struct cmd_context *cmd = lv->vg->cmd;
const struct segment_type *segtype;
struct dm_list *parallel_areas;
struct alloc_handle *ah;
struct logical_volume *log_lv;
if (!(parallel_areas = build_parallel_areas_from_lv(lv, 0, 0)))
return_NULL;
if (!(segtype = get_segtype_from_string(cmd, SEG_TYPE_NAME_MIRROR)))
return_NULL;
/* Allocate destination extents */
if (!(ah = allocate_extents(lv->vg, NULL, segtype,
0, 0, 1, region_size,
lv->le_count, allocatable_pvs,
alloc, 0, parallel_areas))) {
log_error("Unable to allocate extents for mirror log.");
return NULL;
}
if (!(log_lv = _create_mirror_log(lv, ah, alloc, lv->name, "_mlog"))) {
log_error("Failed to create mirror log.");
goto out;
}
if (!_init_mirror_log(cmd, log_lv, in_sync, &lv->tags, 1)) {
log_error("Failed to initialise mirror log.");
log_lv = NULL;
goto out;
}
out:
alloc_destroy(ah);
return log_lv;
}
int add_mirror_log(struct cmd_context *cmd, struct logical_volume *lv, int add_mirror_log(struct cmd_context *cmd, struct logical_volume *lv,
uint32_t log_count, uint32_t region_size, uint32_t log_count, uint32_t region_size,
struct dm_list *allocatable_pvs, alloc_policy_t alloc) struct dm_list *allocatable_pvs, alloc_policy_t alloc)