From: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
Return EAGAIN in case RAID5 would block because of waiting due to
reshaping.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@xxxxxxxx>
---
drivers/md/raid5.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 928e24a07133..707a3907d100 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5601,6 +5601,13 @@ static bool raid5_make_request(struct mddev *mddev, struct bio * bi)
last_sector = bio_end_sector(bi);
bi->bi_next = NULL;
+ if ((bi->bi_opf & REQ_NOWAIT) &&
+ conf->reshape_progress != MaxSector &&
+ (mddev->reshape_backwards ? logical_sector < conf->reshape_safe : last_sector >= conf->reshape_safe)) {
+ bio_wouldblock_error(bi);
+ return true;
+ }
+
prepare_to_wait(&conf->wait_for_overlap, &w, TASK_UNINTERRUPTIBLE);
for (;logical_sector < last_sector; logical_sector += STRIPE_SECTORS) {
int previous;
--
2.14.2
