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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/raid10.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 9c56b27b754a..aacd8c3381f5 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1454,6 +1454,13 @@ static void raid10_write_request(struct mddev *mddev= , struct bio *bio, =20 is_bad =3D is_badblock(rdev, dev_sector, max_sectors, &first_bad, &bad_sectors); + + 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 dev_sector) { /* Cannot write here at all */ bad_sectors -=3D (dev_sector - first_bad); @@ -4029,6 +4036,7 @@ static int raid10_set_queue_limits(struct mddev *mdde= v) lim.max_write_zeroes_sectors =3D 0; lim.io_min =3D mddev->chunk_sectors << 9; lim.io_opt =3D lim.io_min * raid10_nr_stripes(conf); + 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