shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2024-12-21 13:34:40 +03:00
Code Releases Activity

thin: enhance lvcreate error paths

Browse Source 
Improve error response and reporting, when creating thin snapshots.
If the thin pool kernel metadata already have device with ID lvm2
tries to create, give more meanigful error message and also properly
restore transaction id to the value known to thin-pool in this case.

Before it's been possible to divert by one from kernel TID value,
and lvm2 stacked delete message for such thin device.
This commit is contained in:
Zdenek Kabelac 2020-09-25 22:43:57 +02:00
parent e2eb1dc501
commit ef59c83f2d
2 changed files with 33 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
WHATS_NEW
View File

@ -1,5 +1,6 @@
Version 2.03.11 -
==================================
Enhance reporting and error handling when creating thin volumes.
Enable vgsplit for VDO volumes.
Lvextend of vdo pool volumes ensure at least 1 new VDO slab is added.
Use revert_lv() on reload error path after vg_revert().

39
lib/metadata/lv_manip.c
View File

@ -7973,6 +7973,8 @@ static struct logical_volume *_lv_create_an_lv(struct volume_group *vg,
struct lv_segment *seg, *pool_seg;
int thin_pool_was_active = -1; /* not scanned, inactive, active */
int historical;
uint64_t transaction_id;
int ret;
if (new_lv_name && lv_name_is_used_in_vg(vg, new_lv_name, &historical)) {
log_error("%sLogical Volume \"%s\" already exists in "
@ -8441,15 +8443,38 @@ static struct logical_volume *_lv_create_an_lv(struct volume_group *vg,
log_very_verbose("Cache pool is prepared.");
} else if (lv_is_thin_volume(lv)) {
/* For snapshot, suspend active thin origin first */
if (origin_lv && lv_is_active(origin_lv) && lv_is_thin_volume(origin_lv)) {
if (!suspend_lv_origin(cmd, origin_lv)) {
log_error("Failed to suspend thin snapshot origin %s/%s.",
origin_lv->vg->name, origin_lv->name);
goto revert_new_lv;
if (origin_lv && lv_is_thin_volume(origin_lv) && lv_is_active(origin_lv)) {
if (!(ret = suspend_lv_origin(cmd, origin_lv))) {
log_error("Failed to suspend thin snapshot origin %s.",
display_lvname(origin_lv));
}
/* Note: always proceed with resume_lv() to leave critical_section */
if (!resume_lv_origin(cmd, origin_lv)) { /* deptree updates thin-pool */
log_error("Failed to resume thin snapshot origin %s/%s.",
origin_lv->vg->name, origin_lv->name);
log_error("Failed to resume thin snapshot origin %s.",
display_lvname(origin_lv));
if (ret)
/* suspend with message was OK, only resume failed */
goto revert_new_lv; /* hard to fix things here */
}
if (!ret) {
/* Pool transaction_id has been incremented for this canceled transaction
* and needs to be restored to the state from this canceled segment.
* TODO: there is low chance actual suspend has failed
*/
if (!lv_thin_pool_transaction_id(pool_lv, &transaction_id)) {
log_error("Aborting. Failed to read transaction_id from thin pool %s.",
display_lvname(pool_lv)); /* Can't even get thin pool transaction id ??? */
} else if (transaction_id != first_seg(pool_lv)->transaction_id) {
if (transaction_id == seg->transaction_id)
log_debug_metadata("Reverting back transaction_id " FMTu64 " for thin pool %s.",
seg->transaction_id, display_lvname(pool_lv));
else
log_warn("WARNING: Metadata for thin pool %s have transaction_id " FMTu64
", but active pool has " FMTu64 ".",
display_lvname(pool_lv), seg->transaction_id, transaction_id);
first_seg(pool_lv)->transaction_id = seg->transaction_id;
first_seg(lv)->device_id = 0; /* no delete of never existing thin device */
}
goto revert_new_lv;
}
/* At this point remove pool messages, snapshot is active */