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authorKent Overstreet <kmo@daterainc.com>2013-10-29 17:17:49 -0700
committerKent Overstreet <kmo@daterainc.com>2013-11-23 22:33:55 -0800
commit1c3b13e64cf70d652fb04e32d13ae3e36810c2e4 (patch)
treeca3d3fd7d0c6d99fa2bc041ed51bac4aaa9a242a /drivers/md/dm-bio-record.h
parent5341a6278bc5d10dbbb2ab6031b41d95c8db7a35 (diff)
downloadlinux-1c3b13e64cf70d652fb04e32d13ae3e36810c2e4.tar.bz2
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.h25
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