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(mtr-vdi-031.wap.labs.mlnx [10.209.102.136]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id xA5GKQmB013132; Tue, 5 Nov 2019 18:20:28 +0200 From: Max Gurtovoy To: linux-nvme@lists.infradead.org, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me Subject: [PATCH 14/15] nvmet: Add metadata support for block devices Date: Tue, 5 Nov 2019 18:20:25 +0200 Message-Id: <20191105162026.183901-16-maxg@mellanox.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20191105162026.183901-1-maxg@mellanox.com> References: <20191105162026.183901-1-maxg@mellanox.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191105_082039_706389_AD4508F7 X-CRM114-Status: GOOD ( 10.56 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vladimirk@mellanox.com, idanb@mellanox.com, israelr@mellanox.com, shlomin@mellanox.com, oren@mellanox.com, maxg@mellanox.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Israel Rukshin Create a block IO request for the metadata from the protection SG list. Signed-off-by: Israel Rukshin Reviewed-by: Max Gurtovoy --- drivers/nvme/target/io-cmd-bdev.c | 78 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 76 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index 2099c82..10d8fd0 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -163,6 +163,52 @@ static void nvmet_bio_done(struct bio *bio) bio_put(bio); } +static int nvmet_bdev_alloc_bip(struct nvmet_req *req, struct bio *bio, + struct sg_mapping_iter *miter) +{ + struct blk_integrity *bi; + struct bio_integrity_payload *bip; + struct block_device *bdev = req->ns->bdev; + int rc; + size_t resid, len; + + bi = bdev_get_integrity(bdev); + if (unlikely(!bi)) { + pr_err("Unable to locate bio_integrity\n"); + return -ENODEV; + } + + bip = bio_integrity_alloc(bio, GFP_NOIO, + min_t(unsigned int, req->prot_sg_cnt, BIO_MAX_PAGES)); + if (IS_ERR(bip)) { + pr_err("Unable to allocate bio_integrity_payload\n"); + return PTR_ERR(bip); + } + + bip->bip_flags |= BIP_NOMAP_INTEGRITY; + bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio)); + bip_set_seed(bip, bio->bi_iter.bi_sector); + + resid = bip->bip_iter.bi_size; + while (resid > 0 && sg_miter_next(miter)) { + len = min_t(size_t, miter->length, resid); + rc = bio_integrity_add_page(bio, miter->page, len, + offset_in_page(miter->addr)); + if (unlikely(rc != len)) { + pr_err("bio_integrity_add_page() failed; %d\n", rc); + sg_miter_stop(miter); + return -ENOMEM; + } + + resid -= len; + if (len < miter->length) + miter->consumed -= miter->length - len; + } + sg_miter_stop(miter); + + return 0; +} + static void nvmet_bdev_execute_rw(struct nvmet_req *req) { int sg_cnt = req->sg_cnt; @@ -170,9 +216,11 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) struct scatterlist *sg; struct blk_plug plug; sector_t sector; - int op, i; + int op, i, rc; + struct sg_mapping_iter prot_miter; - if (!nvmet_check_transfer_len(req, nvmet_rw_data_len(req))) + if (!nvmet_check_transfer_len(req, + nvmet_rw_data_len(req) + req->prot_len)) return; if (!req->sg_cnt) { @@ -207,11 +255,25 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) bio->bi_opf = op; blk_start_plug(&plug); + if (req->is_protected) + sg_miter_start(&prot_miter, req->prot_sg, req->prot_sg_cnt, + op == REQ_OP_READ ? SG_MITER_FROM_SG : + SG_MITER_TO_SG); + for_each_sg(req->sg, sg, req->sg_cnt, i) { while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset) != sg->length) { struct bio *prev = bio; + if (req->is_protected) { + rc = nvmet_bdev_alloc_bip(req, bio, + &prot_miter); + if (unlikely(rc)) { + bio_io_error(bio); + return; + } + } + bio = bio_alloc(GFP_KERNEL, min(sg_cnt, BIO_MAX_PAGES)); bio_set_dev(bio, req->ns->bdev); bio->bi_iter.bi_sector = sector; @@ -225,6 +287,14 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) sg_cnt--; } + if (req->is_protected) { + rc = nvmet_bdev_alloc_bip(req, bio, &prot_miter); + if (unlikely(rc)) { + bio_io_error(bio); + return; + } + } + submit_bio(bio); blk_finish_plug(&plug); } @@ -352,6 +422,10 @@ u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req) case nvme_cmd_read: case nvme_cmd_write: req->execute = nvmet_bdev_execute_rw; + if (req->sq->ctrl->pi_support && nvmet_ns_has_pi(req->ns)) { + req->is_protected = true; + req->prot_len = nvmet_rw_prot_len(req); + } return 0; case nvme_cmd_flush: req->execute = nvmet_bdev_execute_flush; -- 1.8.3.1 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme