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snapshots: Fix monitoring to use cow not internal LV.

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This commit is contained in:
Alasdair G Kergon 2016-09-20 02:30:58 +01:00
parent ed37b4a626
commit 414d39085c
2 changed files with 5 additions and 3 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.166 - Version 2.02.166 -
===================================== =====================================
Always specify snapshot cow LV for monitoring not internal LV. (2.02.165)
Fix lvchange --discard|--zero for active thin-pool. Fix lvchange --discard|--zero for active thin-pool.
Enforce 4MiB or 25% metadata free space for thin pool operations. Enforce 4MiB or 25% metadata free space for thin pool operations.
Fix lock-holder device for thin pool with inactive thin volumes. Fix lock-holder device for thin pool with inactive thin volumes.

7
lib/activate/activate.c
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@ -1774,7 +1774,8 @@ int monitor_dev_for_events(struct cmd_context *cmd, const struct logical_volume
/* /*
* In case this LV is a snapshot origin, we instead monitor * In case this LV is a snapshot origin, we instead monitor
* each of its respective snapshots. The origin itself may * each of its respective snapshots. The origin itself may
* also need to be monitored if it is a mirror, for example. * also need to be monitored if it is a mirror, for example,
* so fall through to process it afterwards.
*/ */
if (!laopts->origin_only && lv_is_origin(lv)) if (!laopts->origin_only && lv_is_origin(lv))
dm_list_iterate_safe(snh, snht, &lv->snapshot_segs) dm_list_iterate_safe(snh, snht, &lv->snapshot_segs)
@ -1835,7 +1836,7 @@ int monitor_dev_for_events(struct cmd_context *cmd, const struct logical_volume
if (!monitor) if (!monitor)
/* When unmonitoring, obtain existing dso being used. */ /* When unmonitoring, obtain existing dso being used. */
monitored = _device_registered_with_dmeventd(cmd, seg->lv, &pending, &dso); monitored = _device_registered_with_dmeventd(cmd, seg_is_snapshot(seg) ? seg->cow : seg->lv, &pending, &dso);
else else
monitored = seg->segtype->ops->target_monitored(seg, &pending); monitored = seg->segtype->ops->target_monitored(seg, &pending);
@ -1870,7 +1871,7 @@ int monitor_dev_for_events(struct cmd_context *cmd, const struct logical_volume
continue; continue;
if (new_unmonitor) { if (new_unmonitor) {
if (!target_register_events(cmd, dso, lv, 0, 0, 10)) { if (!target_register_events(cmd, dso, seg_is_snapshot(seg) ? seg->cow : lv, 0, 0, 10)) {
log_error("%s: segment unmonitoring failed.", log_error("%s: segment unmonitoring failed.",
display_lvname(lv)); display_lvname(lv));