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authorMartin K. Petersen <martin.petersen@oracle.com>2014-09-26 19:19:56 -0400
committerJens Axboe <axboe@fb.com>2014-09-27 09:14:46 -0600
commit180b2f95dd331010a9930a65c8a18d6d81b94dc1 (patch)
tree8ceb4a28e15e1e588b52022a844f81daabd0f92d /drivers
parente7258c1a269e0967856c81d182c286a78f5ecf15 (diff)
downloadlinux-180b2f95dd331010a9930a65c8a18d6d81b94dc1.tar.bz2
block: Replace bi_integrity with bi_special
For commands like REQ_COPY we need a way to pass extra information along with each bio. Like integrity metadata this information must be available at the bottom of the stack so bi_private does not suffice. Rename the existing bi_integrity field to bi_special and make it a union so we can have different bio extensions for each class of command. We previously used bi_integrity != NULL as a way to identify whether a bio had integrity metadata or not. Introduce a REQ_INTEGRITY to be the indicator now that bi_special can contain different things. In addition, bio_integrity(bio) will now return a pointer to the integrity payload (when applicable). Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Sagi Grimberg <sagig@mellanox.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/scsi/sd_dif.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/scsi/sd_dif.c b/drivers/scsi/sd_dif.c
index a7a691d0af7d..29f0477a8708 100644
--- a/drivers/scsi/sd_dif.c
+++ b/drivers/scsi/sd_dif.c
@@ -383,9 +383,9 @@ void sd_dif_prepare(struct request *rq, sector_t hw_sector,
if (bio_flagged(bio, BIO_MAPPED_INTEGRITY))
break;
- virt = bio->bi_integrity->bip_iter.bi_sector & 0xffffffff;
+ virt = bio_integrity(bio)->bip_iter.bi_sector & 0xffffffff;
- bip_for_each_vec(iv, bio->bi_integrity, iter) {
+ bip_for_each_vec(iv, bio_integrity(bio), iter) {
sdt = kmap_atomic(iv.bv_page)
+ iv.bv_offset;
@@ -434,9 +434,9 @@ void sd_dif_complete(struct scsi_cmnd *scmd, unsigned int good_bytes)
struct bio_vec iv;
struct bvec_iter iter;
- virt = bio->bi_integrity->bip_iter.bi_sector & 0xffffffff;
+ virt = bio_integrity(bio)->bip_iter.bi_sector & 0xffffffff;
- bip_for_each_vec(iv, bio->bi_integrity, iter) {
+ bip_for_each_vec(iv, bio_integrity(bio), iter) {
sdt = kmap_atomic(iv.bv_page)
+ iv.bv_offset;