md-cluster: Suspend writes in RAID10 if within range
If there is a resync going on, all nodes must suspend
writes to the range. This is recorded in suspend_info
and suspend_list.
If there is an I/O within the ranges of any of the
suspend_info, area_resyncing will return 1.
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: Shaohua Li <shli@fb.com>
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 6189023..cc6a56a 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1294,6 +1294,22 @@ static void raid10_write_request(struct mddev *mddev, struct bio *bio,
sector_t sectors;
int max_sectors;
+ if ((mddev_is_clustered(mddev) &&
+ md_cluster_ops->area_resyncing(mddev, WRITE,
+ bio->bi_iter.bi_sector,
+ bio_end_sector(bio)))) {
+ DEFINE_WAIT(w);
+ for (;;) {
+ prepare_to_wait(&conf->wait_barrier,
+ &w, TASK_IDLE);
+ if (!md_cluster_ops->area_resyncing(mddev, WRITE,
+ bio->bi_iter.bi_sector, bio_end_sector(bio)))
+ break;
+ schedule();
+ }
+ finish_wait(&conf->wait_barrier, &w);
+ }
+
/*
* Register the new request and wait if the reconstruction
* thread has put up a bar for new requests.