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md-cluster: Suspend writes in RAID10 if within range

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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 <[email protected]>
Signed-off-by: Shaohua Li <[email protected]>
This commit is contained in:
Guoqing Jiang 2017-10-24 15:11:51 +08:00 • committed by Shaohua Li
commit cb8a7a7e10
1 changed files with 16 additions and 0 deletions
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16
drivers/md/raid10.c
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@ -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.