path: root/drivers/md/dm-integrity.c
diff options
authorChristoph Hellwig <hch@lst.de>2017-08-23 19:10:32 +0200
committerJens Axboe <axboe@kernel.dk>2017-08-23 12:49:55 -0600
commit74d46992e0d9dee7f1f376de0d56d31614c8a17a (patch)
tree399c316bb960541135e557bc1765caeec6d00084 /drivers/md/dm-integrity.c
parentblock: cache the partition index in struct block_device (diff)
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-integrity.c')
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/md/dm-integrity.c b/drivers/md/dm-integrity.c
index 3acce09bba35..27c0f223f8ea 100644
--- a/drivers/md/dm-integrity.c
+++ b/drivers/md/dm-integrity.c
@@ -250,7 +250,8 @@ struct dm_integrity_io {
struct completion *completion;
- struct block_device *orig_bi_bdev;
+ struct gendisk *orig_bi_disk;
+ u8 orig_bi_partno;
bio_end_io_t *orig_bi_end_io;
struct bio_integrity_payload *orig_bi_integrity;
struct bvec_iter orig_bi_iter;
@@ -1164,7 +1165,8 @@ static void integrity_end_io(struct bio *bio)
struct dm_integrity_io *dio = dm_per_bio_data(bio, sizeof(struct dm_integrity_io));
bio->bi_iter = dio->orig_bi_iter;
- bio->bi_bdev = dio->orig_bi_bdev;
+ bio->bi_disk = dio->orig_bi_disk;
+ bio->bi_partno = dio->orig_bi_partno;
if (dio->orig_bi_integrity) {
bio->bi_integrity = dio->orig_bi_integrity;
bio->bi_opf |= REQ_INTEGRITY;
@@ -1681,8 +1683,9 @@ sleep:
dio->orig_bi_iter = bio->bi_iter;
- dio->orig_bi_bdev = bio->bi_bdev;
- bio->bi_bdev = ic->dev->bdev;
+ dio->orig_bi_disk = bio->bi_disk;
+ dio->orig_bi_partno = bio->bi_partno;
+ bio_set_dev(bio, ic->dev->bdev);
dio->orig_bi_integrity = bio_integrity(bio);
bio->bi_integrity = NULL;