diff options
author | Jens Axboe <axboe@kernel.dk> | 2018-05-29 12:56:20 -0600 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2018-05-29 12:56:20 -0600 |
commit | b7405176b58aa475354f3c0d2ca1c560e9354288 (patch) | |
tree | 1810d6482aa9be3793765df152fee76dd79d6995 | |
parent | 5afb78356cead66db2203061fed6fc8957527ed4 (diff) | |
parent | 75c8b19a23100455339af947e032f1a221344c68 (diff) | |
download | linux-b7405176b58aa475354f3c0d2ca1c560e9354288.tar.bz2 |
Merge branch 'nvme-4.18-2' of git://git.infradead.org/nvme into for-4.18/block
Pull NVMe changes from Christoph:
"Here is the current batch of nvme updates for 4.18, we have a few more
patches in the queue, but I'd like to get this pile into your tree
and linux-next ASAP.
The biggest item is support for file-backed namespaces in the NVMe
target from Chaitanya, in addition to that we mostly small fixes from
all the usual suspects."
* 'nvme-4.18-2' of git://git.infradead.org/nvme:
nvme: fixup memory leak in nvme_init_identify()
nvme: fix KASAN warning when parsing host nqn
nvmet-loop: use nr_phys_segments when map rq to sgl
nvmet-fc: increase LS buffer count per fc port
nvmet: add simple file backed ns support
nvmet: remove duplicate NULL initialization for req->ns
nvmet: make a few error messages more generic
nvme-fabrics: allow duplicate connections to the discovery controller
nvme-fabrics: centralize discovery controller defaults
nvme-fabrics: remove unnecessary controller subnqn validation
nvme-fc: remove setting DNR on exception conditions
nvme-rdma: stop admin queue before freeing it
nvme-pci: Fix AER reset handling
nvme-pci: set nvmeq->cq_vector after alloc cq/sq
nvme: host: core: fix precedence of ternary operator
nvme: fix lockdep warning in nvme_mpath_clear_current_path
-rw-r--r-- | drivers/nvme/host/core.c | 9 | ||||
-rw-r--r-- | drivers/nvme/host/fabrics.c | 21 | ||||
-rw-r--r-- | drivers/nvme/host/fc.c | 10 | ||||
-rw-r--r-- | drivers/nvme/host/nvme.h | 3 | ||||
-rw-r--r-- | drivers/nvme/host/pci.c | 39 | ||||
-rw-r--r-- | drivers/nvme/host/rdma.c | 10 | ||||
-rw-r--r-- | drivers/nvme/target/Makefile | 4 | ||||
-rw-r--r-- | drivers/nvme/target/admin-cmd.c | 10 | ||||
-rw-r--r-- | drivers/nvme/target/core.c | 55 | ||||
-rw-r--r-- | drivers/nvme/target/discovery.c | 2 | ||||
-rw-r--r-- | drivers/nvme/target/fabrics-cmd.c | 4 | ||||
-rw-r--r-- | drivers/nvme/target/fc.c | 2 | ||||
-rw-r--r-- | drivers/nvme/target/io-cmd-bdev.c (renamed from drivers/nvme/target/io-cmd.c) | 77 | ||||
-rw-r--r-- | drivers/nvme/target/io-cmd-file.c | 300 | ||||
-rw-r--r-- | drivers/nvme/target/loop.c | 2 | ||||
-rw-r--r-- | drivers/nvme/target/nvmet.h | 28 |
16 files changed, 457 insertions, 119 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 5e1d6d69b307..2c4cf65641a6 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -1578,7 +1578,7 @@ static int nvme_pr_reserve(struct block_device *bdev, u64 key, static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, enum pr_type type, bool abort) { - u32 cdw10 = nvme_pr_type(type) << 8 | abort ? 2 : 1; + u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1); return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); } @@ -1590,7 +1590,7 @@ static int nvme_pr_clear(struct block_device *bdev, u64 key) static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) { - u32 cdw10 = nvme_pr_type(type) << 8 | key ? 1 << 3 : 0; + u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 1 << 3 : 0); return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); } @@ -2184,7 +2184,8 @@ static int nvme_init_subsystem(struct nvme_ctrl *ctrl, struct nvme_id_ctrl *id) * Verify that the subsystem actually supports multiple * controllers, else bail out. */ - if (nvme_active_ctrls(found) && !(id->cmic & (1 << 1))) { + if (!ctrl->opts->discovery_nqn && + nvme_active_ctrls(found) && !(id->cmic & (1 << 1))) { dev_err(ctrl->device, "ignoring ctrl due to duplicate subnqn (%s).\n", found->subnqn); @@ -2315,7 +2316,7 @@ int nvme_init_identify(struct nvme_ctrl *ctrl) if (id->lpa & NVME_CTRL_LPA_CMD_EFFECTS_LOG) { ret = nvme_get_effects_log(ctrl); if (ret < 0) - return ret; + goto out_free; } if (!ctrl->identified) { diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c index 7ae732a77fe8..aa318136460e 100644 --- a/drivers/nvme/host/fabrics.c +++ b/drivers/nvme/host/fabrics.c @@ -57,7 +57,7 @@ static struct nvmf_host *nvmf_host_add(const char *hostnqn) goto out_unlock; kref_init(&host->ref); - memcpy(host->nqn, hostnqn, NVMF_NQN_SIZE); + strlcpy(host->nqn, hostnqn, NVMF_NQN_SIZE); list_add_tail(&host->list, &nvmf_hosts); out_unlock: @@ -689,10 +689,6 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts, opts->discovery_nqn = !(strcmp(opts->subsysnqn, NVME_DISC_SUBSYS_NAME)); - if (opts->discovery_nqn) { - opts->kato = 0; - opts->nr_io_queues = 0; - } break; case NVMF_OPT_TRADDR: p = match_strdup(args); @@ -851,6 +847,11 @@ static int nvmf_parse_options(struct nvmf_ctrl_options *opts, } } + if (opts->discovery_nqn) { + opts->kato = 0; + opts->nr_io_queues = 0; + opts->duplicate_connect = true; + } if (ctrl_loss_tmo < 0) opts->max_reconnects = -1; else @@ -983,16 +984,6 @@ nvmf_create_ctrl(struct device *dev, const char *buf, size_t count) goto out_module_put; } - if (strcmp(ctrl->subsys->subnqn, opts->subsysnqn)) { - dev_warn(ctrl->device, - "controller returned incorrect NQN: \"%s\".\n", - ctrl->subsys->subnqn); - module_put(ops->module); - up_read(&nvmf_transports_rwsem); - nvme_delete_ctrl_sync(ctrl); - return ERR_PTR(-EINVAL); - } - module_put(ops->module); up_read(&nvmf_transports_rwsem); return ctrl; diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index 8b66879b4ebf..ac35a80f5532 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -1686,16 +1686,6 @@ done: goto check_error; } - /* - * Force failures of commands if we're killing the controller - * or have an error on a command used to create an new association - */ - if (status && - (blk_queue_dying(rq->q) || - ctrl->ctrl.state == NVME_CTRL_NEW || - ctrl->ctrl.state == NVME_CTRL_CONNECTING)) - status |= cpu_to_le16(NVME_SC_DNR << 1); - __nvme_fc_fcpop_chk_teardowns(ctrl, op, opstate); nvme_end_request(rq, status, result); diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 35d9915829e2..ec6e4acc4d48 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -22,6 +22,7 @@ #include <linux/lightnvm.h> #include <linux/sed-opal.h> #include <linux/fault-inject.h> +#include <linux/rcupdate.h> extern unsigned int nvme_io_timeout; #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ) @@ -449,7 +450,7 @@ static inline void nvme_mpath_clear_current_path(struct nvme_ns *ns) { struct nvme_ns_head *head = ns->head; - if (head && ns == srcu_dereference(head->current_path, &head->srcu)) + if (head && ns == rcu_access_pointer(head->current_path)) rcu_assign_pointer(head->current_path, NULL); } struct nvme_ns *nvme_find_path(struct nvme_ns_head *head); diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 31525324b79f..bca8f521f887 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -1076,7 +1076,7 @@ static int adapter_delete_queue(struct nvme_dev *dev, u8 opcode, u16 id) } static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, - struct nvme_queue *nvmeq) + struct nvme_queue *nvmeq, s16 vector) { struct nvme_command c; int flags = NVME_QUEUE_PHYS_CONTIG | NVME_CQ_IRQ_ENABLED; @@ -1091,7 +1091,7 @@ static int adapter_alloc_cq(struct nvme_dev *dev, u16 qid, c.create_cq.cqid = cpu_to_le16(qid); c.create_cq.qsize = cpu_to_le16(nvmeq->q_depth - 1); c.create_cq.cq_flags = cpu_to_le16(flags); - c.create_cq.irq_vector = cpu_to_le16(nvmeq->cq_vector); + c.create_cq.irq_vector = cpu_to_le16(vector); return nvme_submit_sync_cmd(dev->ctrl.admin_q, &c, NULL, 0); } @@ -1462,6 +1462,7 @@ static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) { struct nvme_dev *dev = nvmeq->dev; int result; + s16 vector; if (dev->cmb && use_cmb_sqes && (dev->cmbsz & NVME_CMBSZ_SQS)) { unsigned offset = (qid - 1) * roundup(SQ_SIZE(nvmeq->q_depth), @@ -1474,15 +1475,21 @@ static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) * A queue's vector matches the queue identifier unless the controller * has only one vector available. */ - nvmeq->cq_vector = dev->num_vecs == 1 ? 0 : qid; - result = adapter_alloc_cq(dev, qid, nvmeq); + vector = dev->num_vecs == 1 ? 0 : qid; + result = adapter_alloc_cq(dev, qid, nvmeq, vector); if (result < 0) - goto release_vector; + goto out; result = adapter_alloc_sq(dev, qid, nvmeq); if (result < 0) goto release_cq; + /* + * Set cq_vector after alloc cq/sq, otherwise nvme_suspend_queue will + * invoke free_irq for it and cause a 'Trying to free already-free IRQ + * xxx' warning if the create CQ/SQ command times out. + */ + nvmeq->cq_vector = vector; nvme_init_queue(nvmeq, qid); result = queue_request_irq(nvmeq); if (result < 0) @@ -1490,13 +1497,13 @@ static int nvme_create_queue(struct nvme_queue *nvmeq, int qid) return result; - release_sq: +release_sq: + nvmeq->cq_vector = -1; dev->online_queues--; adapter_delete_sq(dev, qid); - release_cq: +release_cq: adapter_delete_cq(dev, qid); - release_vector: - nvmeq->cq_vector = -1; +out: return result; } @@ -2695,19 +2702,15 @@ static pci_ers_result_t nvme_slot_reset(struct pci_dev *pdev) dev_info(dev->ctrl.device, "restart after slot reset\n"); pci_restore_state(pdev); - nvme_reset_ctrl_sync(&dev->ctrl); - - switch (dev->ctrl.state) { - case NVME_CTRL_LIVE: - case NVME_CTRL_ADMIN_ONLY: - return PCI_ERS_RESULT_RECOVERED; - default: - return PCI_ERS_RESULT_DISCONNECT; - } + nvme_reset_ctrl(&dev->ctrl); + return PCI_ERS_RESULT_RECOVERED; } static void nvme_error_resume(struct pci_dev *pdev) { + struct nvme_dev *dev = pci_get_drvdata(pdev); + + flush_work(&dev->ctrl.reset_work); pci_cleanup_aer_uncorrect_error_status(pdev); } diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index ac7462cd7f0f..7b3f08410430 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -778,7 +778,7 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl, if (error) { dev_err(ctrl->ctrl.device, "prop_get NVME_REG_CAP failed\n"); - goto out_cleanup_queue; + goto out_stop_queue; } ctrl->ctrl.sqsize = @@ -786,23 +786,25 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl, error = nvme_enable_ctrl(&ctrl->ctrl, ctrl->ctrl.cap); if (error) - goto out_cleanup_queue; + goto out_stop_queue; ctrl->ctrl.max_hw_sectors = (ctrl->max_fr_pages - 1) << (ilog2(SZ_4K) - 9); error = nvme_init_identify(&ctrl->ctrl); if (error) - goto out_cleanup_queue; + goto out_stop_queue; error = nvme_rdma_alloc_qe(ctrl->queues[0].device->dev, &ctrl->async_event_sqe, sizeof(struct nvme_command), DMA_TO_DEVICE); if (error) - goto out_cleanup_queue; + goto out_stop_queue; return 0; +out_stop_queue: + nvme_rdma_stop_queue(&ctrl->queues[0]); out_cleanup_queue: if (new) blk_cleanup_queue(ctrl->ctrl.admin_q); diff --git a/drivers/nvme/target/Makefile b/drivers/nvme/target/Makefile index 488250189c99..8118c93391c6 100644 --- a/drivers/nvme/target/Makefile +++ b/drivers/nvme/target/Makefile @@ -6,8 +6,8 @@ obj-$(CONFIG_NVME_TARGET_RDMA) += nvmet-rdma.o obj-$(CONFIG_NVME_TARGET_FC) += nvmet-fc.o obj-$(CONFIG_NVME_TARGET_FCLOOP) += nvme-fcloop.o -nvmet-y += core.o configfs.o admin-cmd.o io-cmd.o fabrics-cmd.o \ - discovery.o +nvmet-y += core.o configfs.o admin-cmd.o fabrics-cmd.o \ + discovery.o io-cmd-file.o io-cmd-bdev.o nvme-loop-y += loop.o nvmet-rdma-y += rdma.o nvmet-fc-y += fc.o diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c index 5e0e9fcc0d4d..b2ba95b2eef7 100644 --- a/drivers/nvme/target/admin-cmd.c +++ b/drivers/nvme/target/admin-cmd.c @@ -45,6 +45,10 @@ static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, return NVME_SC_INVALID_NS; } + /* we don't have the right data for file backed ns */ + if (!ns->bdev) + goto out; + host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]); data_units_read = part_stat_read(ns->bdev->bd_part, sectors[READ]); host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]); @@ -54,6 +58,7 @@ static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, put_unaligned_le64(data_units_read, &slog->data_units_read[0]); put_unaligned_le64(host_writes, &slog->host_writes[0]); put_unaligned_le64(data_units_written, &slog->data_units_written[0]); +out: nvmet_put_namespace(ns); return NVME_SC_SUCCESS; @@ -71,6 +76,9 @@ static u16 nvmet_get_smart_log_all(struct nvmet_req *req, rcu_read_lock(); list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) { + /* we don't have the right data for file backed ns */ + if (!ns->bdev) + continue; host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]); data_units_read += part_stat_read(ns->bdev->bd_part, sectors[READ]); @@ -548,8 +556,6 @@ u16 nvmet_parse_admin_cmd(struct nvmet_req *req) struct nvme_command *cmd = req->cmd; u16 ret; - req->ns = NULL; - ret = nvmet_check_ctrl_status(req, cmd); if (unlikely(ret)) return ret; diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index e95424f172fd..800aaf96ddcd 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -271,6 +271,12 @@ void nvmet_put_namespace(struct nvmet_ns *ns) percpu_ref_put(&ns->ref); } +static void nvmet_ns_dev_disable(struct nvmet_ns *ns) +{ + nvmet_bdev_ns_disable(ns); + nvmet_file_ns_disable(ns); +} + int nvmet_ns_enable(struct nvmet_ns *ns) { struct nvmet_subsys *subsys = ns->subsys; @@ -281,23 +287,16 @@ int nvmet_ns_enable(struct nvmet_ns *ns) if (ns->enabled) goto out_unlock; - ns->bdev = blkdev_get_by_path(ns->device_path, FMODE_READ | FMODE_WRITE, - NULL); - if (IS_ERR(ns->bdev)) { - pr_err("failed to open block device %s: (%ld)\n", - ns->device_path, PTR_ERR(ns->bdev)); - ret = PTR_ERR(ns->bdev); - ns->bdev = NULL; + ret = nvmet_bdev_ns_enable(ns); + if (ret) + ret = nvmet_file_ns_enable(ns); + if (ret) goto out_unlock; - } - - ns->size = i_size_read(ns->bdev->bd_inode); - ns->blksize_shift = blksize_bits(bdev_logical_block_size(ns->bdev)); ret = percpu_ref_init(&ns->ref, nvmet_destroy_namespace, 0, GFP_KERNEL); if (ret) - goto out_blkdev_put; + goto out_dev_put; if (ns->nsid > subsys->max_nsid) subsys->max_nsid = ns->nsid; @@ -328,9 +327,8 @@ int nvmet_ns_enable(struct nvmet_ns *ns) out_unlock: mutex_unlock(&subsys->lock); return ret; -out_blkdev_put: - blkdev_put(ns->bdev, FMODE_WRITE|FMODE_READ); - ns->bdev = NULL; +out_dev_put: + nvmet_ns_dev_disable(ns); goto out_unlock; } @@ -366,8 +364,7 @@ void nvmet_ns_disable(struct nvmet_ns *ns) list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) nvmet_add_async_event(ctrl, NVME_AER_TYPE_NOTICE, 0, 0); - if (ns->bdev) - blkdev_put(ns->bdev, FMODE_WRITE|FMODE_READ); + nvmet_ns_dev_disable(ns); out_unlock: mutex_unlock(&subsys->lock); } @@ -499,6 +496,25 @@ int nvmet_sq_init(struct nvmet_sq *sq) } EXPORT_SYMBOL_GPL(nvmet_sq_init); +static u16 nvmet_parse_io_cmd(struct nvmet_req *req) +{ + struct nvme_command *cmd = req->cmd; + u16 ret; + + ret = nvmet_check_ctrl_status(req, cmd); + if (unlikely(ret)) + return ret; + + req->ns = nvmet_find_namespace(req->sq->ctrl, cmd->rw.nsid); + if (unlikely(!req->ns)) + return NVME_SC_INVALID_NS | NVME_SC_DNR; + + if (req->ns->file) + return nvmet_file_parse_io_cmd(req); + else + return nvmet_bdev_parse_io_cmd(req); +} + bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq, struct nvmet_sq *sq, const struct nvmet_fabrics_ops *ops) { @@ -710,15 +726,14 @@ out: u16 nvmet_check_ctrl_status(struct nvmet_req *req, struct nvme_command *cmd) { if (unlikely(!(req->sq->ctrl->cc & NVME_CC_ENABLE))) { - pr_err("got io cmd %d while CC.EN == 0 on qid = %d\n", + pr_err("got cmd %d while CC.EN == 0 on qid = %d\n", cmd->common.opcode, req->sq->qid); return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR; } if (unlikely(!(req->sq->ctrl->csts & NVME_CSTS_RDY))) { - pr_err("got io cmd %d while CSTS.RDY == 0 on qid = %d\n", + pr_err("got cmd %d while CSTS.RDY == 0 on qid = %d\n", cmd->common.opcode, req->sq->qid); - req->ns = NULL; return NVME_SC_CMD_SEQ_ERROR | NVME_SC_DNR; } return 0; diff --git a/drivers/nvme/target/discovery.c b/drivers/nvme/target/discovery.c index 231e04e0a496..08656b849bd6 100644 --- a/drivers/nvme/target/discovery.c +++ b/drivers/nvme/target/discovery.c @@ -187,8 +187,6 @@ u16 nvmet_parse_discovery_cmd(struct nvmet_req *req) { struct nvme_command *cmd = req->cmd; - req->ns = NULL; - if (unlikely(!(req->sq->ctrl->csts & NVME_CSTS_RDY))) { pr_err("got cmd %d while not ready\n", cmd->common.opcode); diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c index 19e9e42ae943..d84ae004cb85 100644 --- a/drivers/nvme/target/fabrics-cmd.c +++ b/drivers/nvme/target/fabrics-cmd.c @@ -77,8 +77,6 @@ u16 nvmet_parse_fabrics_cmd(struct nvmet_req *req) { struct nvme_command *cmd = req->cmd; - req->ns = NULL; - switch (cmd->fabrics.fctype) { case nvme_fabrics_type_property_set: req->data_len = 0; @@ -242,8 +240,6 @@ u16 nvmet_parse_connect_cmd(struct nvmet_req *req) { struct nvme_command *cmd = req->cmd; - req->ns = NULL; - if (cmd->common.opcode != nvme_fabrics_command) { pr_err("invalid command 0x%x on unconnected queue.\n", cmd->fabrics.opcode); diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c index 33ee8d3145f8..408279cb6f2c 100644 --- a/drivers/nvme/target/fc.c +++ b/drivers/nvme/target/fc.c @@ -31,7 +31,7 @@ /* *************************** Data Structures/Defines ****************** */ -#define NVMET_LS_CTX_COUNT 4 +#define NVMET_LS_CTX_COUNT 256 /* for this implementation, assume small single frame rqst/rsp */ #define NVME_FC_MAX_LS_BUFFER_SIZE 2048 diff --git a/drivers/nvme/target/io-cmd.c b/drivers/nvme/target/io-cmd-bdev.c index cd2344179673..e0b0f7df70c2 100644 --- a/drivers/nvme/target/io-cmd.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -16,6 +16,34 @@ #include <linux/module.h> #include "nvmet.h" +int nvmet_bdev_ns_enable(struct nvmet_ns *ns) +{ + int ret; + + ns->bdev = blkdev_get_by_path(ns->device_path, + FMODE_READ | FMODE_WRITE, NULL); + if (IS_ERR(ns->bdev)) { + ret = PTR_ERR(ns->bdev); + if (ret != -ENOTBLK) { + pr_err("failed to open block device %s: (%ld)\n", + ns->device_path, PTR_ERR(ns->bdev)); + } + ns->bdev = NULL; + return ret; + } + ns->size = i_size_read(ns->bdev->bd_inode); + ns->blksize_shift = blksize_bits(bdev_logical_block_size(ns->bdev)); + return 0; +} + +void nvmet_bdev_ns_disable(struct nvmet_ns *ns) +{ + if (ns->bdev) { + blkdev_put(ns->bdev, FMODE_WRITE | FMODE_READ); + ns->bdev = NULL; + } +} + static void nvmet_bio_done(struct bio *bio) { struct nvmet_req *req = bio->bi_private; @@ -23,20 +51,14 @@ static void nvmet_bio_done(struct bio *bio) nvmet_req_complete(req, bio->bi_status ? NVME_SC_INTERNAL | NVME_SC_DNR : 0); - if (bio != &req->inline_bio) + if (bio != &req->b.inline_bio) bio_put(bio); } -static inline u32 nvmet_rw_len(struct nvmet_req *req) -{ - return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) << - req->ns->blksize_shift; -} - -static void nvmet_execute_rw(struct nvmet_req *req) +static void nvmet_bdev_execute_rw(struct nvmet_req *req) { int sg_cnt = req->sg_cnt; - struct bio *bio = &req->inline_bio; + struct bio *bio = &req->b.inline_bio; struct scatterlist *sg; sector_t sector; blk_qc_t cookie; @@ -89,9 +111,9 @@ static void nvmet_execute_rw(struct nvmet_req *req) blk_poll(bdev_get_queue(req->ns->bdev), cookie); } -static void nvmet_execute_flush(struct nvmet_req *req) +static void nvmet_bdev_execute_flush(struct nvmet_req *req) { - struct bio *bio = &req->inline_bio; + struct bio *bio = &req->b.inline_bio; bio_init(bio, req->inline_bvec, ARRAY_SIZE(req->inline_bvec)); bio_set_dev(bio, req->ns->bdev); @@ -102,7 +124,7 @@ static void nvmet_execute_flush(struct nvmet_req *req) submit_bio(bio); } -static u16 nvmet_discard_range(struct nvmet_ns *ns, +static u16 nvmet_bdev_discard_range(struct nvmet_ns *ns, struct nvme_dsm_range *range, struct bio **bio) { int ret; @@ -116,7 +138,7 @@ static u16 nvmet_discard_range(struct nvmet_ns *ns, return 0; } -static void nvmet_execute_discard(struct nvmet_req *req) +static void nvmet_bdev_execute_discard(struct nvmet_req *req) { struct nvme_dsm_range range; struct bio *bio = NULL; @@ -129,7 +151,7 @@ static void nvmet_execute_discard(struct nvmet_req *req) if (status) break; - status = nvmet_discard_range(req->ns, &range, &bio); + status = nvmet_bdev_discard_range(req->ns, &range, &bio); if (status) break; } @@ -148,11 +170,11 @@ static void nvmet_execute_discard(struct nvmet_req *req) } } -static void nvmet_execute_dsm(struct nvmet_req *req) +static void nvmet_bdev_execute_dsm(struct nvmet_req *req) { switch (le32_to_cpu(req->cmd->dsm.attributes)) { case NVME_DSMGMT_AD: - nvmet_execute_discard(req); + nvmet_bdev_execute_discard(req); return; case NVME_DSMGMT_IDR: case NVME_DSMGMT_IDW: @@ -163,7 +185,7 @@ static void nvmet_execute_dsm(struct nvmet_req *req) } } -static void nvmet_execute_write_zeroes(struct nvmet_req *req) +static void nvmet_bdev_execute_write_zeroes(struct nvmet_req *req) { struct nvme_write_zeroes_cmd *write_zeroes = &req->cmd->write_zeroes; struct bio *bio = NULL; @@ -189,38 +211,27 @@ static void nvmet_execute_write_zeroes(struct nvmet_req *req) } } -u16 nvmet_parse_io_cmd(struct nvmet_req *req) +u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req) { struct nvme_command *cmd = req->cmd; - u16 ret; - - ret = nvmet_check_ctrl_status(req, cmd); - if (unlikely(ret)) { - req->ns = NULL; - return ret; - } - - req->ns = nvmet_find_namespace(req->sq->ctrl, cmd->rw.nsid); - if (unlikely(!req->ns)) - return NVME_SC_INVALID_NS | NVME_SC_DNR; switch (cmd->common.opcode) { case nvme_cmd_read: case nvme_cmd_write: - req->execute = nvmet_execute_rw; + req->execute = nvmet_bdev_execute_rw; req->data_len = nvmet_rw_len(req); return 0; case nvme_cmd_flush: - req->execute = nvmet_execute_flush; + req->execute = nvmet_bdev_execute_flush; req->data_len = 0; return 0; case nvme_cmd_dsm: - req->execute = nvmet_execute_dsm; + req->execute = nvmet_bdev_execute_dsm; req->data_len = (le32_to_cpu(cmd->dsm.nr) + 1) * sizeof(struct nvme_dsm_range); return 0; case nvme_cmd_write_zeroes: - req->execute = nvmet_execute_write_zeroes; + req->execute = nvmet_bdev_execute_write_zeroes; return 0; default: pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode, diff --git a/drivers/nvme/target/io-cmd-file.c b/drivers/nvme/target/io-cmd-file.c new file mode 100644 index 000000000000..ca1ccf867856 --- /dev/null +++ b/drivers/nvme/target/io-cmd-file.c @@ -0,0 +1,300 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * NVMe Over Fabrics Target File I/O commands implementation. + * Copyright (c) 2017-2018 Western Digital Corporation or its + * affiliates. + */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt +#include <linux/uio.h> +#include <linux/falloc.h> +#include <linux/file.h> +#include "nvmet.h" + +#define NVMET_MAX_MPOOL_BVEC 16 +#define NVMET_MIN_MPOOL_OBJ 16 + +void nvmet_file_ns_disable(struct nvmet_ns *ns) +{ + if (ns->file) { + mempool_destroy(ns->bvec_pool); + ns->bvec_pool = NULL; + kmem_cache_destroy(ns->bvec_cache); + ns->bvec_cache = NULL; + fput(ns->file); + ns->file = NULL; + } +} + +int nvmet_file_ns_enable(struct nvmet_ns *ns) +{ + int ret; + struct kstat stat; + + ns->file = filp_open(ns->device_path, + O_RDWR | O_LARGEFILE | O_DIRECT, 0); + if (IS_ERR(ns->file)) { + pr_err("failed to open file %s: (%ld)\n", + ns->device_path, PTR_ERR(ns->bdev)); + return PTR_ERR(ns->file); + } + + ret = vfs_getattr(&ns->file->f_path, + &stat, STATX_SIZE, AT_STATX_FORCE_SYNC); + if (ret) + goto err; + + ns->size = stat.size; + ns->blksize_shift = file_inode(ns->file)->i_blkbits; + + ns->bvec_cache = kmem_cache_create("nvmet-bvec", + NVMET_MAX_MPOOL_BVEC * sizeof(struct bio_vec), + 0, SLAB_HWCACHE_ALIGN, NULL); + if (!ns->bvec_cache) + goto err; + + ns->bvec_pool = mempool_create(NVMET_MIN_MPOOL_OBJ, mempool_alloc_slab, + mempool_free_slab, ns->bvec_cache); + + if (!ns->bvec_pool) + goto err; + + return ret; +err: + ns->size = 0; + ns->blksize_shift = 0; + nvmet_file_ns_disable(ns); + return ret; +} + +static void nvmet_file_init_bvec(struct bio_vec *bv, struct sg_page_iter *iter) +{ + bv->bv_page = sg_page_iter_page(iter); + bv->bv_offset = iter->sg->offset; + bv->bv_len = PAGE_SIZE - iter->sg->offset; +} + +static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos, + unsigned long nr_segs, size_t count) +{ + struct kiocb *iocb = &req->f.iocb; + ssize_t (*call_iter)(struct kiocb *iocb, struct iov_iter *iter); + struct iov_iter iter; + int ki_flags = 0, rw; + ssize_t ret; + + if (req->cmd->rw.opcode == nvme_cmd_write) { + if (req->cmd->rw.control & cpu_to_le16(NVME_RW_FUA)) + ki_flags = IOCB_DSYNC; + call_iter = req->ns->file->f_op->write_iter; + rw = WRITE; + } else { + call_iter = req->ns->file->f_op->read_iter; + rw = READ; + } + + iov_iter_bvec(&iter, ITER_BVEC | rw, req->f.bvec, nr_segs, count); + + iocb->ki_pos = pos; + iocb->ki_filp = req->ns->file; + iocb->ki_flags = IOCB_DIRECT | ki_flags; + + ret = call_iter(iocb, &iter); + + if (ret != -EIOCBQUEUED && iocb->ki_complete) + iocb->ki_complete(iocb, ret, 0); + + return ret; +} + +static void nvmet_file_io_done(struct kiocb *iocb, long ret, long ret2) +{ + struct nvmet_req *req = container_of(iocb, struct nvmet_req, f.iocb); + + if (req->f.bvec != req->inline_bvec) { + if (likely(req->f.mpool_alloc == false)) + kfree(req->f.bvec); + else + mempool_free(req->f.bvec, req->ns->bvec_pool); + } + + nvmet_req_complete(req, ret != req->data_len ? + NVME_SC_INTERNAL | NVME_SC_DNR : 0); +} + +static void nvmet_file_execute_rw(struct nvmet_req *req) +{ + ssize_t nr_bvec = DIV_ROUND_UP(req->data_len, PAGE_SIZE); + struct sg_page_iter sg_pg_iter; + unsigned long bv_cnt = 0; + bool is_sync = false; + size_t len = 0, total_len = 0; + ssize_t ret = 0; + loff_t pos; + + if (!req->sg_cnt || !nr_bvec) { + nvmet_req_complete(req, 0); + return; + } + + if (nr_bvec > NVMET_MAX_INLINE_BIOVEC) + req->f.bvec = kmalloc_array(nr_bvec, sizeof(struct bio_vec), + GFP_KERNEL); + else + req->f.bvec = req->inline_bvec; + + req->f.mpool_alloc = false; + if (unlikely(!req->f.bvec)) { + /* fallback under memory pressure */ + req->f.bvec = mempool_alloc(req->ns->bvec_pool, GFP_KERNEL); + req->f.mpool_alloc = true; + if (nr_bvec > NVMET_MAX_MPOOL_BVEC) + is_sync = true; + } + + pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift; + + memset(&req->f.iocb, 0, sizeof(struct kiocb)); + for_each_sg_page(req->sg, &sg_pg_iter, req->sg_cnt, 0) { + nvmet_file_init_bvec(&req->f.bvec[bv_cnt], &sg_pg_iter); + len += req->f.bvec[bv_cnt].bv_len; + total_len += req->f.bvec[bv_cnt].bv_len; + bv_cnt++; + + WARN_ON_ONCE((nr_bvec - 1) < 0); + + if (unlikely(is_sync) && + (nr_bvec - 1 == 0 || bv_cnt == NVMET_MAX_MPOOL_BVEC)) { + ret = nvmet_file_submit_bvec(req, pos, bv_cnt, len); + if (ret < 0) + goto out; + pos += len; + bv_cnt = 0; + len = 0; + } + nr_bvec--; + } + + if (WARN_ON_ONCE(total_len != req->data_len)) + ret = -EIO; +out: + if (unlikely(is_sync || ret)) { + nvmet_file_io_done(&req->f.iocb, ret < 0 ? ret : total_len, 0); + return; + } + req->f.iocb.ki_complete = nvmet_file_io_done; + nvmet_file_submit_bvec(req, pos, bv_cnt, total_len); +} + +static void nvmet_file_flush_work(struct work_struct *w) +{ + struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); + int ret; + + ret = vfs_fsync(req->ns->file, 1); + + nvmet_req_complete(req, ret < 0 ? NVME_SC_INTERNAL | NVME_SC_DNR : 0); +} + +static void nvmet_file_execute_flush(struct nvmet_req *req) +{ + INIT_WORK(&req->f.work, nvmet_file_flush_work); + schedule_work(&req->f.work); +} + +static void nvmet_file_execute_discard(struct nvmet_req *req) +{ + int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE; + struct nvme_dsm_range range; + loff_t offset; + loff_t len; + int i, ret; + + for (i = 0; i <= le32_to_cpu(req->cmd->dsm.nr); i++) { + if (nvmet_copy_from_sgl(req, i * sizeof(range), &range, + sizeof(range))) + break; + offset = le64_to_cpu(range.slba) << req->ns->blksize_shift; + len = le32_to_cpu(range.nlb) << req->ns->blksize_shift; + ret = vfs_fallocate(req->ns->file, mode, offset, len); + if (ret) + break; + } + + nvmet_req_complete(req, ret < 0 ? NVME_SC_INTERNAL | NVME_SC_DNR : 0); +} + +static void nvmet_file_dsm_work(struct work_struct *w) +{ + struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); + + switch (le32_to_cpu(req->cmd->dsm.attributes)) { + case NVME_DSMGMT_AD: + nvmet_file_execute_discard(req); + return; + case NVME_DSMGMT_IDR: + case NVME_DSMGMT_IDW: + default: + /* Not supported yet */ + nvmet_req_complete(req, 0); + return; + } +} + +static void nvmet_file_execute_dsm(struct nvmet_req *req) +{ + INIT_WORK(&req->f.work, nvmet_file_dsm_work); + schedule_work(&req->f.work); +} + +static void nvmet_file_write_zeroes_work(struct work_struct *w) +{ + struct nvmet_req *req = container_of(w, struct nvmet_req, f.work); + struct nvme_write_zeroes_cmd *write_zeroes = &req->cmd->write_zeroes; + int mode = FALLOC_FL_ZERO_RANGE | FALLOC_FL_KEEP_SIZE; + loff_t offset; + loff_t len; + int ret; + + offset = le64_to_cpu(write_zeroes->slba) << req->ns->blksize_shift; + len = (((sector_t)le16_to_cpu(write_zeroes->length) + 1) << + req->ns->blksize_shift); + + ret = vfs_fallocate(req->ns->file, mode, offset, len); + nvmet_req_complete(req, ret < 0 ? NVME_SC_INTERNAL | NVME_SC_DNR : 0); +} + +static void nvmet_file_execute_write_zeroes(struct nvmet_req *req) +{ + INIT_WORK(&req->f.work, nvmet_file_write_zeroes_work); + schedule_work(&req->f.work); +} + +u16 nvmet_file_parse_io_cmd(struct nvmet_req *req) +{ + struct nvme_command *cmd = req->cmd; + + switch (cmd->common.opcode) { + case nvme_cmd_read: + case nvme_cmd_write: + req->execute = nvmet_file_execute_rw; + req->data_len = nvmet_rw_len(req); + return 0; + case nvme_cmd_flush: + req->execute = nvmet_file_execute_flush; + req->data_len = 0; + return 0; + case nvme_cmd_dsm: + req->execute = nvmet_file_execute_dsm; + req->data_len = (le32_to_cpu(cmd->dsm.nr) + 1) * + sizeof(struct nvme_dsm_range); + return 0; + case nvme_cmd_write_zeroes: + req->execute = nvmet_file_execute_write_zeroes; + req->data_len = 0; + return 0; + default: + pr_err("unhandled cmd for file ns %d on qid %d\n", + cmd->common.opcode, req->sq->qid); + return NVME_SC_INVALID_OPCODE | NVME_SC_DNR; + } +} diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c index 22e3627bf16b..02cc316fad39 100644 --- a/drivers/nvme/target/loop.c +++ b/drivers/nvme/target/loop.c @@ -174,7 +174,7 @@ static blk_status_t nvme_loop_queue_rq(struct blk_mq_hw_ctx *hctx, &queue->nvme_sq, &nvme_loop_ops)) return BLK_STS_OK; - if (blk_rq_payload_bytes(req)) { + if (blk_rq_nr_phys_segments(req)) { iod->sg_table.sgl = iod->first_sgl; if (sg_alloc_table_chained(&iod->sg_table, blk_rq_nr_phys_segments(req), diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index 15fd84ab21f8..2d09afcfe505 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -43,6 +43,7 @@ struct nvmet_ns { struct list_head dev_link; struct percpu_ref ref; struct block_device *bdev; + struct file *file; u32 nsid; u32 blksize_shift; loff_t size; @@ -57,6 +58,8 @@ struct nvmet_ns { struct config_group group; struct completion disable_done; + mempool_t *bvec_pool; + struct kmem_cache *bvec_cache; }; static inline struct nvmet_ns *to_nvmet_ns(struct config_item *item) @@ -222,8 +225,18 @@ struct nvmet_req { struct nvmet_cq *cq; struct nvmet_ns *ns; struct scatterlist *sg; - struct bio inline_bio; struct bio_vec inline_bvec[NVMET_MAX_INLINE_BIOVEC]; + union { + struct { + struct bio inline_bio; + } b; + struct { + bool mpool_alloc; + struct kiocb iocb; + struct bio_vec *bvec; + struct work_struct work; + } f; + }; int sg_cnt; /* data length as parsed from the command: */ size_t data_len; @@ -263,7 +276,8 @@ struct nvmet_async_event { }; u16 nvmet_parse_connect_cmd(struct nvmet_req *req); -u16 nvmet_parse_io_cmd(struct nvmet_req *req); +u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req); +u16 nvmet_file_parse_io_cmd(struct nvmet_req *req); u16 nvmet_parse_admin_cmd(struct nvmet_req *req); u16 nvmet_parse_discovery_cmd(struct nvmet_req *req); u16 nvmet_parse_fabrics_cmd(struct nvmet_req *req); @@ -338,4 +352,14 @@ extern struct rw_semaphore nvmet_config_sem; bool nvmet_host_allowed(struct nvmet_req *req, struct nvmet_subsys *subsys, const char *hostnqn); +int nvmet_bdev_ns_enable(struct nvmet_ns *ns); +int nvmet_file_ns_enable(struct nvmet_ns *ns); +void nvmet_bdev_ns_disable(struct nvmet_ns *ns); +void nvmet_file_ns_disable(struct nvmet_ns *ns); + +static inline u32 nvmet_rw_len(struct nvmet_req *req) +{ + return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) << + req->ns->blksize_shift; +} #endif /* _NVMET_H */ |