diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-08-23 19:10:32 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-08-23 12:49:55 -0600 |
| commit | 74d46992e0d9dee7f1f376de0d56d31614c8a17a (patch) | |
| tree | 399c316bb960541135e557bc1765caeec6d00084 /drivers/md/dm-stripe.c | |
| parent | c2ee070fb00365d7841f6661dcdc7fbe6620bdf8 (diff) | |
| download | linux-74d46992e0d9dee7f1f376de0d56d31614c8a17a.tar.bz2 | |
block: replace bi_bdev with a gendisk pointer and partitions index
This way we don't need a block_device structure to submit I/O. The
block_device has different life time rules from the gendisk and
request_queue and is usually only available when the block device node
is open. Other callers need to explicitly create one (e.g. the lightnvm
passthrough code, or the new nvme multipathing code).
For the actual I/O path all that we need is the gendisk, which exists
once per block device. But given that the block layer also does
partition remapping we additionally need a partition index, which is
used for said remapping in generic_make_request.
Note that all the block drivers generally want request_queue or
sometimes the gendisk, so this removes a layer of indirection all
over the stack.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md/dm-stripe.c')
| -rw-r--r-- | drivers/md/dm-stripe.c | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c index a0375530b07f..ab50d7c4377f 100644 --- a/drivers/md/dm-stripe.c +++ b/drivers/md/dm-stripe.c @@ -270,7 +270,7 @@ static int stripe_map_range(struct stripe_c *sc, struct bio *bio, stripe_map_range_sector(sc, bio_end_sector(bio), target_stripe, &end); if (begin < end) { - bio->bi_bdev = sc->stripe[target_stripe].dev->bdev; + bio_set_dev(bio, sc->stripe[target_stripe].dev->bdev); bio->bi_iter.bi_sector = begin + sc->stripe[target_stripe].physical_start; bio->bi_iter.bi_size = to_bytes(end - begin); @@ -291,7 +291,7 @@ static int stripe_map(struct dm_target *ti, struct bio *bio) if (bio->bi_opf & REQ_PREFLUSH) { target_bio_nr = dm_bio_get_target_bio_nr(bio); BUG_ON(target_bio_nr >= sc->stripes); - bio->bi_bdev = sc->stripe[target_bio_nr].dev->bdev; + bio_set_dev(bio, sc->stripe[target_bio_nr].dev->bdev); return DM_MAPIO_REMAPPED; } if (unlikely(bio_op(bio) == REQ_OP_DISCARD) || @@ -306,7 +306,7 @@ static int stripe_map(struct dm_target *ti, struct bio *bio) &stripe, &bio->bi_iter.bi_sector); bio->bi_iter.bi_sector += sc->stripe[stripe].physical_start; - bio->bi_bdev = sc->stripe[stripe].dev->bdev; + bio_set_dev(bio, sc->stripe[stripe].dev->bdev); return DM_MAPIO_REMAPPED; } @@ -430,9 +430,7 @@ static int stripe_end_io(struct dm_target *ti, struct bio *bio, return DM_ENDIO_DONE; memset(major_minor, 0, sizeof(major_minor)); - sprintf(major_minor, "%d:%d", - MAJOR(disk_devt(bio->bi_bdev->bd_disk)), - MINOR(disk_devt(bio->bi_bdev->bd_disk))); + sprintf(major_minor, "%d:%d", MAJOR(bio_dev(bio)), MINOR(bio_dev(bio))); /* * Test to see which stripe drive triggered the event |