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md-cluster: transfer the resync ownership to another node

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When node A stops an array while the array is doing a resync, we need
to let another node B take over the resync task.

To achieve the goal, we need the A send an explicit BITMAP_NEEDS_SYNC
message to the cluster. And the node B which received that message will
invoke __recover_slot to do resync.

Reviewed-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>
This commit is contained in:
Guoqing Jiang
2015-07-10 16:54:04 +08:00
committed by NeilBrown
parent 05cd0e5176
commit dc737d7c3d
2 changed files with 18 additions and 3 deletions
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6
drivers/md/md.c
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@@ -7959,9 +7959,6 @@ void md_do_sync(struct md_thread *thread)
/* tell personality that we are finished */
mddev->pers->sync_request(mddev, max_sectors, &skipped);
if (mddev_is_clustered(mddev))
md_cluster_ops->resync_finish(mddev);
if (!test_bit(MD_RECOVERY_CHECK, &mddev->recovery) &&
mddev->curr_resync > 2) {
if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
@@ -7995,6 +7992,9 @@ void md_do_sync(struct md_thread *thread)
}
}
skip:
if (mddev_is_clustered(mddev))
md_cluster_ops->resync_finish(mddev);
set_bit(MD_CHANGE_DEVS, &mddev->flags);
spin_lock(&mddev->lock);