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lvpoll: improve merge polling

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When multiple polling tasks are watching for same LV, clearly
when some of them wins the game - other polling tasks will fail.
Improve the logic and report success if the merged LV is
actually not a merging origin anymore (since likely someone
else has already finished merging).
This commit is contained in:
Zdenek Kabelac 2021-03-14 22:03:41 +01:00
parent 1a451207b8
commit eadd58a97d
2 changed files with 14 additions and 6 deletions
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11
tools/lvconvert_poll.c
View File

@ -111,9 +111,9 @@ int lvconvert_merge_finish(struct cmd_context *cmd,
struct lv_segment *snap_seg = find_snapshot(lv);
if (!lv_is_merging_origin(lv)) {
log_error("Logical volume %s has no merging snapshot.",
log_print("Logical volume %s is no longer merging origin, polling has finished.",
display_lvname(lv));
return 0;
return 1;
}
log_print_unless_silent("Merge of snapshot into logical volume %s has finished.",
@ -141,8 +141,11 @@ progress_t poll_merge_progress(struct cmd_context *cmd,
{
dm_percent_t percent = DM_PERCENT_0;
if (!lv_is_merging_origin(lv) ||
!lv_snapshot_percent(lv, &percent)) {
if (!lv_is_merging_origin(lv))
/* Nothing to monitor here */
return PROGRESS_FINISHED_ALL;
if (!lv_snapshot_percent(lv, &percent)) {
log_error("%s: Failed query for merging percentage. Aborting merge.",
display_lvname(lv));
return PROGRESS_CHECK_FAILED;

5
tools/polldaemon.c
View File

@ -172,8 +172,13 @@ int wait_for_single_lv(struct cmd_context *cmd, struct poll_operation_id *id,
vg = vg_read(cmd, id->vg_name, NULL, READ_FOR_UPDATE, lockd_state, &error_flags, NULL);
if (!vg) {
/* What more could we do here? */
if (error_flags & FAILED_NOTFOUND) {
log_print_unless_silent("Can't find VG %s. No longer active.", id->display_name);
ret = 1;
} else {
log_error("ABORTING: Can't reread VG for %s error flags %x.", id->display_name, error_flags);
ret = 0;
}
goto out;
}