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md-cluster: send BITMAP_NEEDS_SYNC message if reshaping is interrupted

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We need to continue the reshaping if it was interrupted in
original node. So original node should call resync_bitmap
in case reshaping is aborted.

Then BITMAP_NEEDS_SYNC message is broadcasted to other nodes,
node which continues the reshaping should restart reshape from
mddev->reshape_position instead of from the first beginning.

Reviewed-by: NeilBrown <neilb@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
This commit is contained in:
Guoqing Jiang 2018-10-18 16:37:47 +08:00 • committed by Shaohua Li
parent cbce6863b6
commit cb9ee15431
2 changed files with 26 additions and 5 deletions
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19
drivers/md/md-cluster.c
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@ -333,6 +333,12 @@ static void recover_bitmaps(struct md_thread *thread)
}
spin_unlock_irq(&cinfo->suspend_lock);
/* Kick off a reshape if needed */
if (test_bit(MD_RESYNCING_REMOTE, &mddev->recovery) &&
test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery) &&
mddev->reshape_position != MaxSector)
md_wakeup_thread(mddev->sync_thread);
if (hi > 0) {
if (lo < mddev->recovery_cp)
mddev->recovery_cp = lo;
@ -1020,10 +1026,17 @@ static int leave(struct mddev *mddev)
if (!cinfo)
return 0;
/* BITMAP_NEEDS_SYNC message should be sent when node
/*
* BITMAP_NEEDS_SYNC message should be sent when node
* is leaving the cluster with dirty bitmap, also we
* can only deliver it when dlm connection is available */
if (cinfo->slot_number > 0 && mddev->recovery_cp != MaxSector)
* can only deliver it when dlm connection is available.
*
* Also, we should send BITMAP_NEEDS_SYNC message in
* case reshaping is interrupted.
*/
if ((cinfo->slot_number > 0 && mddev->recovery_cp != MaxSector) ||
(mddev->reshape_position != MaxSector &&
test_bit(MD_CLOSING, &mddev->flags)))
resync_bitmap(mddev);
set_bit(MD_CLUSTER_HOLDING_MUTEX_FOR_RECVD, &cinfo->state);