diff options
Diffstat (limited to 'drivers/nvme/target/io-cmd-bdev.c')
| -rw-r--r-- | drivers/nvme/target/io-cmd-bdev.c | 118 |
1 files changed, 114 insertions, 4 deletions
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index 26f50c23b82e..3dd6f566a240 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -47,6 +47,22 @@ void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id) id->nows = to0based(ql->io_opt / ql->logical_block_size); } +static void nvmet_bdev_ns_enable_integrity(struct nvmet_ns *ns) +{ + struct blk_integrity *bi = bdev_get_integrity(ns->bdev); + + if (bi) { + ns->metadata_size = bi->tuple_size; + if (bi->profile == &t10_pi_type1_crc) + ns->pi_type = NVME_NS_DPS_PI_TYPE1; + else if (bi->profile == &t10_pi_type3_crc) + ns->pi_type = NVME_NS_DPS_PI_TYPE3; + else + /* Unsupported metadata type */ + ns->metadata_size = 0; + } +} + int nvmet_bdev_ns_enable(struct nvmet_ns *ns) { int ret; @@ -64,6 +80,12 @@ int nvmet_bdev_ns_enable(struct nvmet_ns *ns) } ns->size = i_size_read(ns->bdev->bd_inode); ns->blksize_shift = blksize_bits(bdev_logical_block_size(ns->bdev)); + + ns->pi_type = 0; + ns->metadata_size = 0; + if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY_T10)) + nvmet_bdev_ns_enable_integrity(ns); + return 0; } @@ -75,6 +97,11 @@ void nvmet_bdev_ns_disable(struct nvmet_ns *ns) } } +void nvmet_bdev_ns_revalidate(struct nvmet_ns *ns) +{ + ns->size = i_size_read(ns->bdev->bd_inode); +} + static u16 blk_to_nvme_status(struct nvmet_req *req, blk_status_t blk_sts) { u16 status = NVME_SC_SUCCESS; @@ -142,6 +169,61 @@ static void nvmet_bio_done(struct bio *bio) bio_put(bio); } +#ifdef CONFIG_BLK_DEV_INTEGRITY +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->metadata_sg_cnt, BIO_MAX_PAGES)); + if (IS_ERR(bip)) { + pr_err("Unable to allocate bio_integrity_payload\n"); + return PTR_ERR(bip); + } + + bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio)); + /* virtual start sector must be in integrity interval units */ + bip_set_seed(bip, bio->bi_iter.bi_sector >> + (bi->interval_exp - SECTOR_SHIFT)); + + 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; +} +#else +static int nvmet_bdev_alloc_bip(struct nvmet_req *req, struct bio *bio, + struct sg_mapping_iter *miter) +{ + return -EINVAL; +} +#endif /* CONFIG_BLK_DEV_INTEGRITY */ + static void nvmet_bdev_execute_rw(struct nvmet_req *req) { int sg_cnt = req->sg_cnt; @@ -149,9 +231,12 @@ 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; + unsigned int iter_flags; + unsigned int total_len = nvmet_rw_data_len(req) + req->metadata_len; - if (!nvmet_check_data_len(req, nvmet_rw_len(req))) + if (!nvmet_check_transfer_len(req, total_len)) return; if (!req->sg_cnt) { @@ -163,8 +248,10 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) op = REQ_OP_WRITE | REQ_SYNC | REQ_IDLE; if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA)) op |= REQ_FUA; + iter_flags = SG_MITER_TO_SG; } else { op = REQ_OP_READ; + iter_flags = SG_MITER_FROM_SG; } if (is_pci_p2pdma_page(sg_page(req->sg))) @@ -186,11 +273,24 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) bio->bi_opf = op; blk_start_plug(&plug); + if (req->metadata_len) + sg_miter_start(&prot_miter, req->metadata_sg, + req->metadata_sg_cnt, iter_flags); + 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->metadata_len) { + 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; @@ -204,6 +304,14 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) sg_cnt--; } + if (req->metadata_len) { + rc = nvmet_bdev_alloc_bip(req, bio, &prot_miter); + if (unlikely(rc)) { + bio_io_error(bio); + return; + } + } + submit_bio(bio); blk_finish_plug(&plug); } @@ -212,7 +320,7 @@ static void nvmet_bdev_execute_flush(struct nvmet_req *req) { struct bio *bio = &req->b.inline_bio; - if (!nvmet_check_data_len(req, 0)) + if (!nvmet_check_transfer_len(req, 0)) return; bio_init(bio, req->inline_bvec, ARRAY_SIZE(req->inline_bvec)); @@ -304,7 +412,7 @@ static void nvmet_bdev_execute_write_zeroes(struct nvmet_req *req) sector_t nr_sector; int ret; - if (!nvmet_check_data_len(req, 0)) + if (!nvmet_check_transfer_len(req, 0)) return; sector = le64_to_cpu(write_zeroes->slba) << @@ -331,6 +439,8 @@ 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->metadata_len = nvmet_rw_metadata_len(req); return 0; case nvme_cmd_flush: req->execute = nvmet_bdev_execute_flush; |