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fs: dlm: make new_lockspace() wait until recovery completes 

Make dlm_new_lockspace() wait until a full recovery completes
sucessfully or fails. Previously, dlm_new_lockspace() returned
to the caller after dlm_recover_members() finished, which is
only partially through recovery.  The result of the previous
behavior is that the new lockspace would not be usable for some
time (especially with overlapping recoveries), and some errors
in the later part of recovery could not be returned to the caller.

Kernel callers gfs2 and cluster-md have their own wait handling to
wait for recovery to complete after calling dlm_new_lockspace().
This continues to work, but will be unnecessary.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Alexander Aring 2022-06-22 14:45:15 -04:00 committed by David Teigland
parent 7e09b15cfe
commit 682bb91b6b
4 changed files with 20 additions and 19 deletions
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4
fs/dlm/dlm_internal.h
View File

@ -606,8 +606,8 @@ struct dlm_ls {
wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
int ls_uevent_result;
struct completion ls_members_done;
int ls_members_result;
struct completion ls_recovery_done;
int ls_recovery_result;
struct miscdevice ls_device;

9
fs/dlm/lockspace.c
View File

@ -548,8 +548,8 @@ static int new_lockspace(const char *name, const char *cluster,
init_waitqueue_head(&ls->ls_uevent_wait);
ls->ls_uevent_result = 0;
init_completion(&ls->ls_members_done);
ls->ls_members_result = -1;
init_completion(&ls->ls_recovery_done);
ls->ls_recovery_result = -1;
mutex_init(&ls->ls_cb_mutex);
INIT_LIST_HEAD(&ls->ls_cb_delay);
@ -645,8 +645,9 @@ static int new_lockspace(const char *name, const char *cluster,
if (error)
goto out_recoverd;
wait_for_completion(&ls->ls_members_done);
error = ls->ls_members_result;
/* wait until recovery is successful or failed */
wait_for_completion(&ls->ls_recovery_done);
error = ls->ls_recovery_result;
if (error)
goto out_members;

13
fs/dlm/member.c
View File

@ -587,19 +587,6 @@ int dlm_recover_members(struct dlm_ls *ls, struct dlm_recover *rv, int *neg_out)
*neg_out = neg;
error = ping_members(ls);
/* error -EINTR means that a new recovery action is triggered.
* We ignore this recovery action and let run the new one which might
* have new member configuration.
*/
if (error == -EINTR)
error = 0;
/* new_lockspace() may be waiting to know if the config
* is good or bad
*/
ls->ls_members_result = error;
complete(&ls->ls_members_done);
log_rinfo(ls, "dlm_recover_members %d nodes", ls->ls_num_nodes);
return error;
}

13
fs/dlm/recoverd.c
View File

@ -243,6 +243,9 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
jiffies_to_msecs(jiffies - start));
mutex_unlock(&ls->ls_recoverd_active);
ls->ls_recovery_result = 0;
complete(&ls->ls_recovery_done);
dlm_lsop_recover_done(ls);
return 0;
@ -251,6 +254,16 @@ static int ls_recover(struct dlm_ls *ls, struct dlm_recover *rv)
log_rinfo(ls, "dlm_recover %llu error %d",
(unsigned long long)rv->seq, error);
mutex_unlock(&ls->ls_recoverd_active);
/* let new_lockspace() get aware of critical error if recovery
* was interrupted -EINTR we wait for the next ls_recover()
* iteration until it succeeds.
*/
if (error != -EINTR) {
ls->ls_recovery_result = error;
complete(&ls->ls_recovery_done);
}
return error;
}