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Commit cb8a7a7e authored by Guoqing Jiang's avatar Guoqing Jiang Committed by Shaohua Li
Browse files

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: default avatarGuoqing Jiang <gqjiang@suse.com>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
parent d4098c72

drivers/md/raid10.c

+16 −0
Original line number Diff line number Diff line
@@ -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.