Remove newly created log volume if initial deactivation fails.

If there is problem deactivate LV and
_init_mirror_log is called with remove_on_failure = 1,
remove the newly created log LV from metadata.

(This can happen if there is active device with the same name
but different UUID.)

The main reason for this "workaround" patch is to
 - do not keep _mlog volume in metadata, so user can repeat the action
 - print better error message describing the real problem

# lvcreate -m 2 -n lv1 -l 1 --nosync vg_bar
  WARNING: New mirror won't be synchronised. Don't read what you didn't write!
  /dev/vg_bar/lv1_mlog: not found: device not cleared
  Aborting. Failed to wipe mirror log.
  Error locking on node bar-01: Input/output error
  Unable to deactivate mirror log LV. Manual intervention required.
  Failed to create mirror log.

# lvcreate -m 2 -n lv1 -l 1 --nosync vg_bar
  WARNING: New mirror won't be synchronised. Don't read what you didn't write!
  Aborting. Unable to deactivate mirror log.
  Failed to initialise mirror log.

diff --git a/WHATS_NEW b/WHATS_NEW
index f5217b5fde2245ed370829a056e19305e703cb8e..ea5cd2a55361bf19de0fcc95e608be9582a18d65 100644 (file)
--- a/WHATS_NEW
+++ b/WHATS_NEW
@@ -1,5 +1,6 @@
 Version 2.02.57 -
 ====================================
+  Remove log volume from metadata if initial deactivation fails.
   Give better error message for pvmove when all data is skipped.
   Fix memory lock imbalance in lv_suspend if already suspended.
   Fix pvmove test mode to not fail and do not poll.

diff --git a/lib/metadata/mirror.c b/lib/metadata/mirror.c
index c331e0ed091f2e03b3bbfb7928ecb9b17871416a..ec7ba14f29c8edae55572da499593588fa0c929a 100644 (file)
--- a/lib/metadata/mirror.c
+++ b/lib/metadata/mirror.c
@@ -255,8 +255,16 @@ static int _init_mirror_log(struct cmd_context *cmd,
 
        /* If the LV is active, deactivate it first. */
        if (lv_info(cmd, log_lv, &info, 0, 0) && info.exists) {
-               if (!deactivate_lv(cmd, log_lv))
-                       return_0;
+               (void)deactivate_lv(cmd, log_lv);
+               /*
+                * FIXME: workaround to fail early
+                * Ensure that log is really deactivated because deactivate_lv
+                * on cluster do not fail if there is log_lv with different UUID.
+                */
+               if (lv_info(cmd, log_lv, &info, 0, 0) && info.exists) {
+                       log_error("Aborting. Unable to deactivate mirror log.");
+                       goto revert_new_lv;
+               }
                was_active = 1;
        }
 
@@ -1354,7 +1362,7 @@ static struct logical_volume *_set_up_mirror_log(struct cmd_context *cmd,
        }
 
        if (!_init_mirror_log(cmd, log_lv, in_sync, &lv->tags, 1)) {
-               log_error("Failed to create mirror log.");
+               log_error("Failed to initialise mirror log.");
                return NULL;
        }