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charset="utf-8" Set BLK_FEAT_ATOMIC_WRITES_STACKED to enable atomic writes. For an attempt to atomic write to a region which has bad blocks, error the write as we just cannot do this. It is unlikely to find devices which support atomic writes and bad blocks. Signed-off-by: John Garry --- drivers/md/raid1.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index a10018282629..b57f69e3e8a7 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1524,6 +1524,13 @@ static void raid1_write_request(struct mddev *mddev,= struct bio *bio, blocked_rdev =3D rdev; break; } + + if (is_bad && bio->bi_opf & REQ_ATOMIC) { + /* We just cannot atomically write this ... */ + error =3D -EFAULT; + goto err_handle; + } + if (is_bad && first_bad <=3D r1_bio->sector) { /* Cannot write here at all */ bad_sectors -=3D (r1_bio->sector - first_bad); @@ -3220,6 +3227,7 @@ static int raid1_set_limits(struct mddev *mddev) =20 md_init_stacking_limits(&lim); lim.max_write_zeroes_sectors =3D 0; + lim.features |=3D BLK_FEAT_ATOMIC_WRITES_STACKED; err =3D mddev_stack_rdev_limits(mddev, &lim, MDDEV_STACK_INTEGRITY); if (err) { queue_limits_cancel_update(mddev->gendisk->queue); --=20 2.31.1