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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 Reviewed-by: Yu Kuai --- drivers/md/raid10.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 8c7f5daa073a..a3936a67e1e8 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1255,6 +1255,7 @@ static void raid10_write_one_disk(struct mddev *mddev, struct r10bio *r10_bio, const enum req_op op = bio_op(bio); const blk_opf_t do_sync = bio->bi_opf & REQ_SYNC; const blk_opf_t do_fua = bio->bi_opf & REQ_FUA; + const blk_opf_t do_atomic = bio->bi_opf & REQ_ATOMIC; unsigned long flags; struct r10conf *conf = mddev->private; struct md_rdev *rdev; @@ -1273,7 +1274,7 @@ static void raid10_write_one_disk(struct mddev *mddev, struct r10bio *r10_bio, mbio->bi_iter.bi_sector = (r10_bio->devs[n_copy].addr + choose_data_offset(r10_bio, rdev)); mbio->bi_end_io = raid10_end_write_request; - mbio->bi_opf = op | do_sync | do_fua; + mbio->bi_opf = op | do_sync | do_fua | do_atomic; if (!replacement && test_bit(FailFast, &conf->mirrors[devnum].rdev->flags) && enough(conf, devnum)) @@ -1468,7 +1469,15 @@ static void raid10_write_request(struct mddev *mddev, struct bio *bio, continue; } if (is_bad) { - int good_sectors = first_bad - dev_sector; + int good_sectors; + + if (bio->bi_opf & REQ_ATOMIC) { + /* We just cannot atomically write this ... */ + error = -EFAULT; + goto err_handle; + } + + good_sectors = first_bad - dev_sector; if (good_sectors < max_sectors) max_sectors = good_sectors; } @@ -4025,6 +4034,7 @@ static int raid10_set_queue_limits(struct mddev *mddev) lim.max_write_zeroes_sectors = 0; lim.io_min = mddev->chunk_sectors << 9; lim.io_opt = lim.io_min * raid10_nr_stripes(conf); + lim.features |= BLK_FEAT_ATOMIC_WRITES_STACKED; err = mddev_stack_rdev_limits(mddev, &lim, MDDEV_STACK_INTEGRITY); if (err) { queue_limits_cancel_update(mddev->gendisk->queue);