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| author | Martin K. Petersen <martin.petersen@oracle.com> | 2014-09-26 19:19:56 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2014-09-27 09:14:46 -0600 |
| commit | 180b2f95dd331010a9930a65c8a18d6d81b94dc1 (patch) | |
| tree | 8ceb4a28e15e1e588b52022a844f81daabd0f92d /block/bio-integrity.c | |
| parent | e7258c1a269e0967856c81d182c286a78f5ecf15 (diff) | |
| download | linux-180b2f95dd331010a9930a65c8a18d6d81b94dc1.tar.gz | |
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 'block/bio-integrity.c')
| -rw-r--r-- | block/bio-integrity.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/block/bio-integrity.c b/block/bio-integrity.c index 36b788552c3e..bd3125c3c124 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -79,6 +79,7 @@ struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, bip->bip_slab = idx; bip->bip_bio = bio; bio->bi_integrity = bip; + bio->bi_rw |= REQ_INTEGRITY; return bip; err: @@ -96,7 +97,7 @@ EXPORT_SYMBOL(bio_integrity_alloc); */ void bio_integrity_free(struct bio *bio) { - struct bio_integrity_payload *bip = bio->bi_integrity; + struct bio_integrity_payload *bip = bio_integrity(bio); struct bio_set *bs = bio->bi_pool; if (bip->bip_owns_buf) @@ -128,7 +129,7 @@ EXPORT_SYMBOL(bio_integrity_free); int bio_integrity_add_page(struct bio *bio, struct page *page, unsigned int len, unsigned int offset) { - struct bio_integrity_payload *bip = bio->bi_integrity; + struct bio_integrity_payload *bip = bio_integrity(bio); struct bio_vec *iv; if (bip->bip_vcnt >= bip->bip_max_vcnt) { @@ -229,7 +230,7 @@ EXPORT_SYMBOL(bio_integrity_tag_size); static int bio_integrity_tag(struct bio *bio, void *tag_buf, unsigned int len, int set) { - struct bio_integrity_payload *bip = bio->bi_integrity; + struct bio_integrity_payload *bip = bio_integrity(bio); struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); unsigned int nr_sectors; @@ -304,12 +305,12 @@ static int bio_integrity_generate_verify(struct bio *bio, int operate) struct bio_vec *bv; sector_t sector; unsigned int sectors, ret = 0, i; - void *prot_buf = bio->bi_integrity->bip_buf; + void *prot_buf = bio_integrity(bio)->bip_buf; if (operate) sector = bio->bi_iter.bi_sector; else - sector = bio->bi_integrity->bip_iter.bi_sector; + sector = bio_integrity(bio)->bip_iter.bi_sector; bix.disk_name = bio->bi_bdev->bd_disk->disk_name; bix.sector_size = bi->sector_size; @@ -505,7 +506,7 @@ static void bio_integrity_verify_fn(struct work_struct *work) */ void bio_integrity_endio(struct bio *bio, int error) { - struct bio_integrity_payload *bip = bio->bi_integrity; + struct bio_integrity_payload *bip = bio_integrity(bio); BUG_ON(bip->bip_bio != bio); @@ -536,7 +537,7 @@ EXPORT_SYMBOL(bio_integrity_endio); */ void bio_integrity_advance(struct bio *bio, unsigned int bytes_done) { - struct bio_integrity_payload *bip = bio->bi_integrity; + struct bio_integrity_payload *bip = bio_integrity(bio); struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); unsigned bytes = bio_integrity_bytes(bi, bytes_done >> 9); @@ -558,7 +559,7 @@ EXPORT_SYMBOL(bio_integrity_advance); void bio_integrity_trim(struct bio *bio, unsigned int offset, unsigned int sectors) { - struct bio_integrity_payload *bip = bio->bi_integrity; + struct bio_integrity_payload *bip = bio_integrity(bio); struct blk_integrity *bi = bdev_get_integrity(bio->bi_bdev); bio_integrity_advance(bio, offset << 9); @@ -577,7 +578,7 @@ EXPORT_SYMBOL(bio_integrity_trim); int bio_integrity_clone(struct bio *bio, struct bio *bio_src, gfp_t gfp_mask) { - struct bio_integrity_payload *bip_src = bio_src->bi_integrity; + struct bio_integrity_payload *bip_src = bio_integrity(bio_src); struct bio_integrity_payload *bip; BUG_ON(bip_src == NULL); |