From 15fbad96fc5fb1c5a0502e6a10dea671f510de3d Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Mon, 14 Nov 2016 14:24:21 +0200 Subject: [PATCH] nvmet: Make cntlid globally unique We usually log the cntlid which is confusing in case we have multiple subsystems each with it's own cntlid ida. Instead make cntlid ida globally unique and log the initial association. Signed-off-by: Sagi Grimberg Reviewed-by: Johannes Thumshirn Reviewed-by: Max Gurtovoy Reviewed-by: Christoph Hellwig Signed-off-by: Jens Axboe --- drivers/nvme/target/core.c | 10 ++++------ drivers/nvme/target/fabrics-cmd.c | 4 ++-- drivers/nvme/target/nvmet.h | 1 - 3 files changed, 6 insertions(+), 9 deletions(-) diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index fc5ba2f9e15f..5267ce20c12d 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -17,6 +17,7 @@ #include "nvmet.h" static struct nvmet_fabrics_ops *nvmet_transports[NVMF_TRTYPE_MAX]; +static DEFINE_IDA(cntlid_ida); /* * This read/write semaphore is used to synchronize access to configuration @@ -749,7 +750,7 @@ u16 nvmet_alloc_ctrl(const char *subsysnqn, const char *hostnqn, if (!ctrl->sqs) goto out_free_cqs; - ret = ida_simple_get(&subsys->cntlid_ida, + ret = ida_simple_get(&cntlid_ida, NVME_CNTLID_MIN, NVME_CNTLID_MAX, GFP_KERNEL); if (ret < 0) { @@ -819,7 +820,7 @@ static void nvmet_ctrl_free(struct kref *ref) flush_work(&ctrl->async_event_work); cancel_work_sync(&ctrl->fatal_err_work); - ida_simple_remove(&subsys->cntlid_ida, ctrl->cntlid); + ida_simple_remove(&cntlid_ida, ctrl->cntlid); nvmet_subsys_put(subsys); kfree(ctrl->sqs); @@ -918,9 +919,6 @@ struct nvmet_subsys *nvmet_subsys_alloc(const char *subsysnqn, mutex_init(&subsys->lock); INIT_LIST_HEAD(&subsys->namespaces); INIT_LIST_HEAD(&subsys->ctrls); - - ida_init(&subsys->cntlid_ida); - INIT_LIST_HEAD(&subsys->hosts); return subsys; @@ -933,7 +931,6 @@ static void nvmet_subsys_free(struct kref *ref) WARN_ON_ONCE(!list_empty(&subsys->namespaces)); - ida_destroy(&subsys->cntlid_ida); kfree(subsys->subsysnqn); kfree(subsys); } @@ -976,6 +973,7 @@ static void __exit nvmet_exit(void) { nvmet_exit_configfs(); nvmet_exit_discovery(); + ida_destroy(&cntlid_ida); BUILD_BUG_ON(sizeof(struct nvmf_disc_rsp_page_entry) != 1024); BUILD_BUG_ON(sizeof(struct nvmf_disc_rsp_page_hdr) != 1024); diff --git a/drivers/nvme/target/fabrics-cmd.c b/drivers/nvme/target/fabrics-cmd.c index f4088198cd0d..18dc314601c3 100644 --- a/drivers/nvme/target/fabrics-cmd.c +++ b/drivers/nvme/target/fabrics-cmd.c @@ -153,8 +153,8 @@ static void nvmet_execute_admin_connect(struct nvmet_req *req) goto out; } - pr_info("creating controller %d for NQN %s.\n", - ctrl->cntlid, ctrl->hostnqn); + pr_info("creating controller %d for subsystem %s for NQN %s.\n", + ctrl->cntlid, ctrl->subsys->subsysnqn, ctrl->hostnqn); req->rsp->result.u16 = cpu_to_le16(ctrl->cntlid); out: diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index cc7ad06b43a7..1370eee0a3c0 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -142,7 +142,6 @@ struct nvmet_subsys { unsigned int max_nsid; struct list_head ctrls; - struct ida cntlid_ida; struct list_head hosts; bool allow_any_host; -- 2.20.1