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Petersen" Cc: Anuj Gupta , linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-kernel@vger.kernel.org, Caleb Sander Mateos , Christoph Hellwig Subject: [PATCH v4 5/5] blk-integrity: avoid sector_t in bip_{get,set}_seed() Date: Fri, 26 Jun 2026 23:42:20 -0600 Message-ID: <20260627054220.2174166-6-csander@purestorage.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260627054220.2174166-1-csander@purestorage.com> References: <20260627054220.2174166-1-csander@purestorage.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit bip_set_seed() and bip_get_seed() take/return a sector_t value that's actually an integrity interval number. This is confusing, so pass struct bio instead to bip_set_seed() and convert the bio's device address to integrity intervals. Open-code the access to bip->bip_iter.bi_sector in the one caller of bip_set_seed() that doesn't use the bio device address for the seed. Open-code bip_get_seed() in its one caller. Add a comment to struct bvec_iter's bi_sector field explaining its alternate use for bip_iter. Suggested-by: Christoph Hellwig Signed-off-by: Caleb Sander Mateos --- block/bio-integrity.c | 5 ++--- block/t10-pi.c | 2 +- drivers/nvme/target/io-cmd-bdev.c | 3 +-- drivers/target/target_core_iblock.c | 3 +-- include/linux/bio-integrity.h | 11 ----------- include/linux/blk-integrity.h | 13 +++++++++++++ include/linux/bvec.h | 1 + 7 files changed, 19 insertions(+), 19 deletions(-) diff --git a/block/bio-integrity.c b/block/bio-integrity.c index d20f9002c7c9..7e5fb9b44848 100644 --- a/block/bio-integrity.c +++ b/block/bio-integrity.c @@ -102,13 +102,12 @@ void bio_integrity_free_buf(struct bio_integrity_payload *bip) void bio_integrity_setup_default(struct bio *bio) { struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); struct bio_integrity_payload *bip = bio_integrity(bio); - u64 seed = bio->bi_iter.bi_sector >> (bi->interval_exp - SECTOR_SHIFT); - bip_set_seed(bip, seed); + bip_set_seed(bio); if (bi->csum_type) { bip->bip_flags |= BIP_CHECK_GUARD; if (bi->csum_type == BLK_INTEGRITY_CSUM_IP) bip->bip_flags |= BIP_IP_CHECKSUM; @@ -488,11 +487,11 @@ int bio_integrity_map_iter(struct bio *bio, struct uio_meta *meta) it.count = integrity_bytes; ret = bio_integrity_map_user(bio, &it); if (!ret) { bio_uio_meta_to_bip(bio, meta); - bip_set_seed(bio_integrity(bio), meta->seed); + bio_integrity(bio)->bip_iter.bi_sector = meta->seed; iov_iter_advance(&meta->iter, integrity_bytes); meta->seed += bio_integrity_intervals(bi, bio_sectors(bio)); } return ret; } diff --git a/block/t10-pi.c b/block/t10-pi.c index 787950dec50a..71367fd082bd 100644 --- a/block/t10-pi.c +++ b/block/t10-pi.c @@ -510,11 +510,11 @@ static void blk_reftag_remap_prepare(struct blk_integrity *bi, static void __blk_reftag_remap(struct bio *bio, struct blk_integrity *bi, unsigned *intervals, u64 *ref, bool prep) { struct bio_integrity_payload *bip = bio_integrity(bio); struct bvec_iter iter = bip->bip_iter; - u64 virt = bip_get_seed(bip); + u64 virt = bip->bip_iter.bi_sector; union pi_tuple *ptuple; union pi_tuple tuple; if (prep && bip->bip_flags & BIP_MAPPED_INTEGRITY) { *ref += bio->bi_iter.bi_size >> bi->interval_exp; diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index f2d9e8901df4..65fce51b024a 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -218,12 +218,11 @@ static int nvmet_bdev_alloc_bip(struct nvmet_req *req, struct bio *bio, pr_err("Unable to allocate bio_integrity_payload\n"); return PTR_ERR(bip); } /* virtual start sector must be in integrity interval units */ - bip_set_seed(bip, bio->bi_iter.bi_sector >> - (bi->interval_exp - SECTOR_SHIFT)); + bip_set_seed(bio); resid = bio_integrity_bytes(bi, bio_sectors(bio)); while (resid > 0 && sg_miter_next(miter)) { len = min_t(size_t, miter->length, resid); rc = bio_integrity_add_page(bio, miter->page, len, diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c index 1087d1d17c36..1aeb5be529a8 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -706,12 +706,11 @@ iblock_alloc_bip(struct se_cmd *cmd, struct bio *bio, pr_err("Unable to allocate bio_integrity_payload\n"); return PTR_ERR(bip); } /* virtual start sector must be in integrity interval units */ - bip_set_seed(bip, bio->bi_iter.bi_sector >> - (bi->interval_exp - SECTOR_SHIFT)); + bip_set_seed(bio); pr_debug("IBLOCK BIP Size: %u Sector: %llu\n", bip->bip_iter.bi_size, (unsigned long long)bip->bip_iter.bi_sector); resid = bio_integrity_bytes(bi, bio_sectors(bio)); diff --git a/include/linux/bio-integrity.h b/include/linux/bio-integrity.h index c3dda32fd803..992cb1622c2c 100644 --- a/include/linux/bio-integrity.h +++ b/include/linux/bio-integrity.h @@ -56,21 +56,10 @@ static inline bool bio_integrity_flagged(struct bio *bio, enum bip_flags flag) return bip->bip_flags & flag; return false; } -static inline sector_t bip_get_seed(struct bio_integrity_payload *bip) -{ - return bip->bip_iter.bi_sector; -} - -static inline void bip_set_seed(struct bio_integrity_payload *bip, - sector_t seed) -{ - bip->bip_iter.bi_sector = seed; -} - void bio_integrity_init(struct bio *bio, struct bio_integrity_payload *bip, struct bio_vec *bvecs, unsigned int nr_vecs); struct bio_integrity_payload *bio_integrity_alloc(struct bio *bio, gfp_t gfp, unsigned int nr); int bio_integrity_add_page(struct bio *bio, struct page *page, unsigned int len, diff --git a/include/linux/blk-integrity.h b/include/linux/blk-integrity.h index 825d777c078b..c82b2f6fe194 100644 --- a/include/linux/blk-integrity.h +++ b/include/linux/blk-integrity.h @@ -85,10 +85,23 @@ static inline unsigned int bio_integrity_bytes(struct blk_integrity *bi, unsigned int sectors) { return bio_integrity_intervals(bi, sectors) * bi->metadata_size; } +/** + * bip_set_seed - Set bip reference tag seed from bio device address + * @bio: struct bio whose integrity payload's ref tag seed to initialize + */ +static inline void bip_set_seed(struct bio *bio) +{ + struct blk_integrity *bi = blk_get_integrity(bio->bi_bdev->bd_disk); + struct bio_integrity_payload *bip = bio_integrity(bio); + + bip->bip_iter.bi_sector = + bio_integrity_intervals(bi, bio->bi_iter.bi_sector); +} + static inline bool blk_integrity_rq(const struct request *rq) { return rq->cmd_flags & REQ_INTEGRITY; } diff --git a/include/linux/bvec.h b/include/linux/bvec.h index 92837e2743f1..22bded380bbf 100644 --- a/include/linux/bvec.h +++ b/include/linux/bvec.h @@ -91,10 +91,11 @@ static inline struct folio *bvec_folio(const struct bio_vec *bv) struct bvec_iter { /* * Current device address in 512 byte sectors. Only updated by the bio * iter wrappers and not the bvec iterator helpers themselves. + * For bip_iter, this is overloaded to represent the integrity interval. */ sector_t bi_sector; /* * Remaining size in bytes. -- 2.54.0