diff options
Diffstat (limited to 'drivers/nvme/target/core.c')
| -rw-r--r-- | drivers/nvme/target/core.c | 104 |
1 files changed, 102 insertions, 2 deletions
diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index 9838103f2d62..ebf3e7a6c49e 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -18,6 +18,7 @@ #include "nvmet.h" +struct workqueue_struct *buffered_io_wq; static const struct nvmet_fabrics_ops *nvmet_transports[NVMF_TRTYPE_MAX]; static DEFINE_IDA(cntlid_ida); @@ -39,6 +40,10 @@ static DEFINE_IDA(cntlid_ida); */ DECLARE_RWSEM(nvmet_config_sem); +u32 nvmet_ana_group_enabled[NVMET_MAX_ANAGRPS + 1]; +u64 nvmet_ana_chgcnt; +DECLARE_RWSEM(nvmet_ana_sem); + static struct nvmet_subsys *nvmet_find_get_subsys(struct nvmet_port *port, const char *subsysnqn); @@ -175,7 +180,7 @@ out_unlock: mutex_unlock(&ctrl->lock); } -static void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid) +void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid) { struct nvmet_ctrl *ctrl; @@ -189,6 +194,33 @@ static void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid) } } +void nvmet_send_ana_event(struct nvmet_subsys *subsys, + struct nvmet_port *port) +{ + struct nvmet_ctrl *ctrl; + + mutex_lock(&subsys->lock); + list_for_each_entry(ctrl, &subsys->ctrls, subsys_entry) { + if (port && ctrl->port != port) + continue; + if (nvmet_aen_disabled(ctrl, NVME_AEN_CFG_ANA_CHANGE)) + continue; + nvmet_add_async_event(ctrl, NVME_AER_TYPE_NOTICE, + NVME_AER_NOTICE_ANA, NVME_LOG_ANA); + } + mutex_unlock(&subsys->lock); +} + +void nvmet_port_send_ana_event(struct nvmet_port *port) +{ + struct nvmet_subsys_link *p; + + down_read(&nvmet_config_sem); + list_for_each_entry(p, &port->subsystems, entry) + nvmet_send_ana_event(p->subsys, port); + up_read(&nvmet_config_sem); +} + int nvmet_register_transport(const struct nvmet_fabrics_ops *ops) { int ret = 0; @@ -241,6 +273,10 @@ int nvmet_enable_port(struct nvmet_port *port) return ret; } + /* If the transport didn't set inline_data_size, then disable it. */ + if (port->inline_data_size < 0) + port->inline_data_size = 0; + port->enabled = true; return 0; } @@ -332,9 +368,13 @@ static void nvmet_ns_dev_disable(struct nvmet_ns *ns) int nvmet_ns_enable(struct nvmet_ns *ns) { struct nvmet_subsys *subsys = ns->subsys; - int ret = 0; + int ret; mutex_lock(&subsys->lock); + ret = -EMFILE; + if (subsys->nr_namespaces == NVMET_MAX_NAMESPACES) + goto out_unlock; + ret = 0; if (ns->enabled) goto out_unlock; @@ -369,6 +409,7 @@ int nvmet_ns_enable(struct nvmet_ns *ns) list_add_tail_rcu(&ns->dev_link, &old->dev_link); } + subsys->nr_namespaces++; nvmet_ns_changed(subsys, ns->nsid); ns->enabled = true; @@ -409,6 +450,7 @@ void nvmet_ns_disable(struct nvmet_ns *ns) percpu_ref_exit(&ns->ref); mutex_lock(&subsys->lock); + subsys->nr_namespaces--; nvmet_ns_changed(subsys, ns->nsid); nvmet_ns_dev_disable(ns); out_unlock: @@ -419,6 +461,10 @@ void nvmet_ns_free(struct nvmet_ns *ns) { nvmet_ns_disable(ns); + down_write(&nvmet_ana_sem); + nvmet_ana_group_enabled[ns->anagrpid]--; + up_write(&nvmet_ana_sem); + kfree(ns->device_path); kfree(ns); } @@ -436,7 +482,14 @@ struct nvmet_ns *nvmet_ns_alloc(struct nvmet_subsys *subsys, u32 nsid) ns->nsid = nsid; ns->subsys = subsys; + + down_write(&nvmet_ana_sem); + ns->anagrpid = NVMET_DEFAULT_ANA_GRPID; + nvmet_ana_group_enabled[ns->anagrpid]++; + up_write(&nvmet_ana_sem); + uuid_gen(&ns->uuid); + ns->buffered_io = false; return ns; } @@ -542,6 +595,35 @@ int nvmet_sq_init(struct nvmet_sq *sq) } EXPORT_SYMBOL_GPL(nvmet_sq_init); +static inline u16 nvmet_check_ana_state(struct nvmet_port *port, + struct nvmet_ns *ns) +{ + enum nvme_ana_state state = port->ana_state[ns->anagrpid]; + + if (unlikely(state == NVME_ANA_INACCESSIBLE)) + return NVME_SC_ANA_INACCESSIBLE; + if (unlikely(state == NVME_ANA_PERSISTENT_LOSS)) + return NVME_SC_ANA_PERSISTENT_LOSS; + if (unlikely(state == NVME_ANA_CHANGE)) + return NVME_SC_ANA_TRANSITION; + return 0; +} + +static inline u16 nvmet_io_cmd_check_access(struct nvmet_req *req) +{ + if (unlikely(req->ns->readonly)) { + switch (req->cmd->common.opcode) { + case nvme_cmd_read: + case nvme_cmd_flush: + break; + default: + return NVME_SC_NS_WRITE_PROTECTED; + } + } + + return 0; +} + static u16 nvmet_parse_io_cmd(struct nvmet_req *req) { struct nvme_command *cmd = req->cmd; @@ -554,6 +636,12 @@ static u16 nvmet_parse_io_cmd(struct nvmet_req *req) req->ns = nvmet_find_namespace(req->sq->ctrl, cmd->rw.nsid); if (unlikely(!req->ns)) return NVME_SC_INVALID_NS | NVME_SC_DNR; + ret = nvmet_check_ana_state(req->port, req->ns); + if (unlikely(ret)) + return ret; + ret = nvmet_io_cmd_check_access(req); + if (unlikely(ret)) + return ret; if (req->ns->file) return nvmet_file_parse_io_cmd(req); @@ -870,6 +958,8 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn, nvmet_init_cap(ctrl); + ctrl->port = req->port; + INIT_WORK(&ctrl->async_event_work, nvmet_async_event_work); INIT_LIST_HEAD(&ctrl->async_events); @@ -1109,6 +1199,15 @@ static int __init nvmet_init(void) { int error; + nvmet_ana_group_enabled[NVMET_DEFAULT_ANA_GRPID] = 1; + + buffered_io_wq = alloc_workqueue("nvmet-buffered-io-wq", + WQ_MEM_RECLAIM, 0); + if (!buffered_io_wq) { + error = -ENOMEM; + goto out; + } + error = nvmet_init_discovery(); if (error) goto out; @@ -1129,6 +1228,7 @@ static void __exit nvmet_exit(void) nvmet_exit_configfs(); nvmet_exit_discovery(); ida_destroy(&cntlid_ida); + destroy_workqueue(buffered_io_wq); BUILD_BUG_ON(sizeof(struct nvmf_disc_rsp_page_entry) != 1024); BUILD_BUG_ON(sizeof(struct nvmf_disc_rsp_page_hdr) != 1024); |