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pvmove: change locking on finish

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This commit is contained in:
Zdenek Kabelac 2017-11-14 20:53:55 +01:00
parent 9d04ecc7b3
commit a25f9b2106
2 changed files with 19 additions and 37 deletions
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1
WHATS_NEW
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@ -1,5 +1,6 @@
Version 2.02.177 -
====================================
Ehnance pvmove locking.
Deactivate activated LVs on error path when pvmove activation fails.
Add "io" to log/debug_classes for logging low-level I/O.
Eliminate redundant nested VG metadata in VG struct.

55
tools/pvmove_poll.c
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@ -92,6 +92,8 @@ int pvmove_update_metadata(struct cmd_context *cmd, struct volume_group *vg,
int pvmove_finish(struct cmd_context *cmd, struct volume_group *vg,
struct logical_volume *lv_mirr, struct dm_list *lvs_changed)
{
struct lv_list *lvl;
struct logical_volume *holder;
int r = 1;
if (!dm_list_empty(lvs_changed) &&
@ -101,48 +103,27 @@ int pvmove_finish(struct cmd_context *cmd, struct volume_group *vg,
return 0;
}
/* Store metadata without dependencies on mirror segments */
if (!vg_write(vg)) {
log_error("ABORTING: Failed to write new data locations "
"to disk.");
if (!lv_update_and_reload(lv_mirr))
return_0;
/* Takes locks and resumed volumes (should be still suspended, but preloaded) */
dm_list_iterate_items(lvl, lvs_changed) {
holder = (struct logical_volume *) lv_lock_holder(lvl->lv);
if (!resume_lv(cmd, holder)) {
log_error("Failed to reactivate logical volume %s.",
display_lvname(holder));
r = 0; /* But try to resume as much as we can */
}
}
if (!r)
return 0;
}
/* Suspend LVs changed (implicitly suspends lv_mirr) */
if (!suspend_lvs(cmd, lvs_changed, vg)) {
log_error("ABORTING: Locking LVs to remove temporary mirror failed");
if (!revert_lv(cmd, lv_mirr))
stack;
return 0;
}
/* Store metadata without dependencies on mirror segments */
if (!vg_commit(vg)) {
log_error("ABORTING: Failed to write new data locations "
"to disk.");
if (!revert_lv(cmd, lv_mirr))
stack;
if (!revert_lvs(cmd, lvs_changed))
stack;
return 0;
}
/* Unsuspend LVs */
if (!resume_lvs(cmd, lvs_changed))
stack;
/* Release mirror LV. (No pending I/O because it's been suspended.) */
if (!activate_lv_excl_local(cmd, lv_mirr)) {
log_error("Unable to reactivate logical volume \"%s\"",
lv_mirr->name);
r = 0;
}
/* Deactivate mirror LV */
if (!deactivate_lv(cmd, lv_mirr)) {
log_error("ABORTING: Unable to deactivate temporary logical "
"volume %s.", display_lvname(lv_mirr));
r = 0;
return 0;
}
log_verbose("Removing temporary pvmove LV");
@ -162,5 +143,5 @@ int pvmove_finish(struct cmd_context *cmd, struct volume_group *vg,
/* FIXME backup positioning */
backup(vg);
return r;
return 1;
}