From cb8a7a7e1098e74d36378b992a6d012668ec10d9 Mon Sep 17 00:00:00 2001 From: Guoqing Jiang Date: Tue, 24 Oct 2017 15:11:51 +0800 Subject: 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 Signed-off-by: Shaohua Li --- drivers/md/raid10.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'drivers/md') diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 61890231972e..cc6a56a659a3 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. -- cgit v1.2.3