diff options
author | Kent Overstreet <kmo@daterainc.com> | 2013-10-30 04:17:49 +0400 |
---|---|---|
committer | Kent Overstreet <kmo@daterainc.com> | 2013-11-24 10:33:55 +0400 |
commit | 1c3b13e64cf70d652fb04e32d13ae3e36810c2e4 (patch) | |
tree | ca3d3fd7d0c6d99fa2bc041ed51bac4aaa9a242a /drivers/md/dm-bio-record.h | |
parent | 5341a6278bc5d10dbbb2ab6031b41d95c8db7a35 (diff) |
dm: Refactor for new bio cloning/splitting
We need to convert the dm code to the new bvec_iter primitives which
respect bi_bvec_done; they also allow us to drastically simplify dm's
bio splitting code.
Also, it's no longer necessary to save/restore the bvec array anymore -
driver conversions for immutable bvecs are done, so drivers should never
be modifying it.
Also kill bio_sector_offset(), dm was the only user and it doesn't make
much sense anymore.
Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Alasdair Kergon <agk@redhat.com>
Cc: dm-devel@redhat.com
Reviewed-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-bio-record.h')
-rw-r--r-- | drivers/md/dm-bio-record.h | 25 |
1 files changed, 0 insertions, 25 deletions
diff --git a/drivers/md/dm-bio-record.h b/drivers/md/dm-bio-record.h index 4f46e8e528de..dd3646111561 100644 --- a/drivers/md/dm-bio-record.h +++ b/drivers/md/dm-bio-record.h @@ -17,49 +17,24 @@ * original bio state. */ -struct dm_bio_vec_details { -#if PAGE_SIZE < 65536 - __u16 bv_len; - __u16 bv_offset; -#else - unsigned bv_len; - unsigned bv_offset; -#endif -}; - struct dm_bio_details { struct block_device *bi_bdev; unsigned long bi_flags; struct bvec_iter bi_iter; - struct dm_bio_vec_details bi_io_vec[BIO_MAX_PAGES]; }; static inline void dm_bio_record(struct dm_bio_details *bd, struct bio *bio) { - unsigned i; - bd->bi_bdev = bio->bi_bdev; bd->bi_flags = bio->bi_flags; bd->bi_iter = bio->bi_iter; - - for (i = 0; i < bio->bi_vcnt; i++) { - bd->bi_io_vec[i].bv_len = bio->bi_io_vec[i].bv_len; - bd->bi_io_vec[i].bv_offset = bio->bi_io_vec[i].bv_offset; - } } static inline void dm_bio_restore(struct dm_bio_details *bd, struct bio *bio) { - unsigned i; - bio->bi_bdev = bd->bi_bdev; bio->bi_flags = bd->bi_flags; bio->bi_iter = bd->bi_iter; - - for (i = 0; i < bio->bi_vcnt; i++) { - bio->bi_io_vec[i].bv_len = bd->bi_io_vec[i].bv_len; - bio->bi_io_vec[i].bv_offset = bd->bi_io_vec[i].bv_offset; - } } #endif |