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authorGuoqing Jiang <gqjiang@suse.com>2017-10-24 15:11:51 +0800
committerShaohua Li <shli@fb.com>2017-11-01 21:32:23 -0700
commitcb8a7a7e1098e74d36378b992a6d012668ec10d9 (patch)
tree54461d8655ba8219f2c1bce3669a8503cd2e5c06 /drivers/md
parentd4098c7262a47f529765d89614484a957363d623 (diff)
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>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/raid10.c16
1 files changed, 16 insertions, 0 deletions
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.