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lvmlockd: skip LV unlocking with no lvmlockd or no lockspace

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vgchange -an vg is permitted when the vg lockspace
is not available, because LVs could still be active
for some reason, and they should be inactive when not
properly locked.  In case lvmlockd was not running, or
the lockspace was not started, the command was
unnecessarily trying and failing to unlock every LV,
printing errors for every LV.  We can skip this when
the lockspace is known to not be available.
This commit is contained in:
David Teigland 2024-06-26 13:57:30 -05:00
parent d85ceff9c5
commit f1d88007b0
3 changed files with 23 additions and 0 deletions
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19
lib/locking/lvmlockd.c
View File

@ -2808,9 +2808,28 @@ int lockd_lv(struct cmd_context *cmd, struct logical_volume *lv,
return 0;
}
if (!_lvmlockd_connected && !strcmp(def_mode, "un")) {
log_debug("Skip LV unlock: no lvmlockd");
return 1;
}
if (!_lvmlockd_connected)
return 0;
/*
* This addresses the specific case of: vgchange -an vg
* when vg is a shared VG that is not started. Without
* this check, the command will try and fail to unlock
* every LV, which is wasted effort if the lockspace is
* not started, especially with many LVs in the VG.
* The command still attempts to deactivate the LVs,
* which it should in case they are active for some reason.
*/
if (lv->vg->lockd_not_started && !strcmp(def_mode, "un")) {
log_debug("Skip LV unlock: no lockspace");
return 1;
}
if (lv_is_thin_type(lv))
return _lockd_lv_thin(cmd, lv, def_mode, flags);

3
lib/metadata/metadata.c
View File

@ -3862,6 +3862,9 @@ static int _access_vg_lock_type(struct cmd_context *cmd, struct volume_group *vg
return 0;
}
if (lockd_state & (LDST_FAIL_NOLS | LDST_FAIL_STARTING))
vg->lockd_not_started = 1;
log_warn("Reading VG %s without a lock.", vg->name);
return 1;
}

1
lib/metadata/vg.h
View File

@ -42,6 +42,7 @@ struct volume_group {
struct lvmcache_vginfo *vginfo;
uint32_t seqno; /* Metadata sequence number */
unsigned skip_validate_lock_args : 1;
unsigned lockd_not_started : 1;
unsigned needs_backup : 1;
unsigned needs_write_and_commit : 1;
uint32_t write_count; /* count the number of vg_write calls */