From e7832cb48a654cd12b2bc9181b2f0ad49d526ac6 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Fri, 2 Aug 2019 19:33:59 -0700 Subject: nvme: make fabrics command run on a separate request queue We have a fundamental issue that fabric commands use the admin_q. The reason is, that admin-connect, register reads and writes and admin commands cannot be guaranteed ordering while we are running controller resets. For example, when we reset a controller we perform: 1. disable the controller 2. teardown the admin queue 3. re-establish the admin queue 4. enable the controller In order to perform (3), we need to unquiesce the admin queue, however we may have some admin commands that are already pending on the quiesced admin_q and will immediate execute when we unquiesce it before we execute (4). The host must not send admin commands to the controller before enabling the controller. To fix this, we have the fabric commands (admin connect and property get/set, but not I/O queue connect) use a separate fabrics_q and make sure to quiesce the admin_q before we disable the controller, and unquiesce it only after we enable the controller. This fixes the error prints from nvmet in a controller reset storm test: kernel: nvmet: got cmd 6 while CC.EN == 0 on qid = 0 Which indicate that the host is sending an admin command when the controller is not enabled. Reviewed-by: James Smart Reviewed-by: Christoph Hellwig Signed-off-by: Sagi Grimberg --- drivers/nvme/host/fabrics.c | 8 ++++---- drivers/nvme/host/fc.c | 15 ++++++++++++--- drivers/nvme/host/nvme.h | 1 + drivers/nvme/host/rdma.c | 19 +++++++++++++++++-- drivers/nvme/host/tcp.c | 19 +++++++++++++++++-- drivers/nvme/target/loop.c | 16 +++++++++++++--- 6 files changed, 64 insertions(+), 14 deletions(-) (limited to 'drivers/nvme') diff --git a/drivers/nvme/host/fabrics.c b/drivers/nvme/host/fabrics.c index 854ce75e6c2d..145c210edb03 100644 --- a/drivers/nvme/host/fabrics.c +++ b/drivers/nvme/host/fabrics.c @@ -150,7 +150,7 @@ int nvmf_reg_read32(struct nvme_ctrl *ctrl, u32 off, u32 *val) cmd.prop_get.fctype = nvme_fabrics_type_property_get; cmd.prop_get.offset = cpu_to_le32(off); - ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, &res, NULL, 0, 0, + ret = __nvme_submit_sync_cmd(ctrl->fabrics_q, &cmd, &res, NULL, 0, 0, NVME_QID_ANY, 0, 0, false); if (ret >= 0) @@ -197,7 +197,7 @@ int nvmf_reg_read64(struct nvme_ctrl *ctrl, u32 off, u64 *val) cmd.prop_get.attrib = 1; cmd.prop_get.offset = cpu_to_le32(off); - ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, &res, NULL, 0, 0, + ret = __nvme_submit_sync_cmd(ctrl->fabrics_q, &cmd, &res, NULL, 0, 0, NVME_QID_ANY, 0, 0, false); if (ret >= 0) @@ -243,7 +243,7 @@ int nvmf_reg_write32(struct nvme_ctrl *ctrl, u32 off, u32 val) cmd.prop_set.offset = cpu_to_le32(off); cmd.prop_set.value = cpu_to_le64(val); - ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, NULL, NULL, 0, 0, + ret = __nvme_submit_sync_cmd(ctrl->fabrics_q, &cmd, NULL, NULL, 0, 0, NVME_QID_ANY, 0, 0, false); if (unlikely(ret)) dev_err(ctrl->device, @@ -396,7 +396,7 @@ int nvmf_connect_admin_queue(struct nvme_ctrl *ctrl) strncpy(data->subsysnqn, ctrl->opts->subsysnqn, NVMF_NQN_SIZE); strncpy(data->hostnqn, ctrl->opts->host->nqn, NVMF_NQN_SIZE); - ret = __nvme_submit_sync_cmd(ctrl->admin_q, &cmd, &res, + ret = __nvme_submit_sync_cmd(ctrl->fabrics_q, &cmd, &res, data, sizeof(*data), 0, NVME_QID_ANY, 1, BLK_MQ_REQ_RESERVED | BLK_MQ_REQ_NOWAIT, false); if (ret) { diff --git a/drivers/nvme/host/fc.c b/drivers/nvme/host/fc.c index ec264b2e54c3..49577a33d25b 100644 --- a/drivers/nvme/host/fc.c +++ b/drivers/nvme/host/fc.c @@ -2006,6 +2006,7 @@ nvme_fc_ctrl_free(struct kref *ref) blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); blk_cleanup_queue(ctrl->ctrl.admin_q); + blk_cleanup_queue(ctrl->ctrl.fabrics_q); blk_mq_free_tag_set(&ctrl->admin_tag_set); kfree(ctrl->queues); @@ -2633,8 +2634,6 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) if (ret) goto out_delete_hw_queue; - blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); - ret = nvmf_connect_admin_queue(&ctrl->ctrl); if (ret) goto out_disconnect_admin_queue; @@ -2655,6 +2654,8 @@ nvme_fc_create_association(struct nvme_fc_ctrl *ctrl) ctrl->ctrl.max_hw_sectors = (ctrl->lport->ops->max_sgl_segments - 1) << (PAGE_SHIFT - 9); + blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); + ret = nvme_init_identify(&ctrl->ctrl); if (ret) goto out_disconnect_admin_queue; @@ -3101,10 +3102,16 @@ nvme_fc_init_ctrl(struct device *dev, struct nvmf_ctrl_options *opts, goto out_free_queues; ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set; + ctrl->ctrl.fabrics_q = blk_mq_init_queue(&ctrl->admin_tag_set); + if (IS_ERR(ctrl->ctrl.fabrics_q)) { + ret = PTR_ERR(ctrl->ctrl.fabrics_q); + goto out_free_admin_tag_set; + } + ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); if (IS_ERR(ctrl->ctrl.admin_q)) { ret = PTR_ERR(ctrl->ctrl.admin_q); - goto out_free_admin_tag_set; + goto out_cleanup_fabrics_q; } /* @@ -3176,6 +3183,8 @@ fail_ctrl: out_cleanup_admin_q: blk_cleanup_queue(ctrl->ctrl.admin_q); +out_cleanup_fabrics_q: + blk_cleanup_queue(ctrl->ctrl.fabrics_q); out_free_admin_tag_set: blk_mq_free_tag_set(&ctrl->admin_tag_set); out_free_queues: diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 624c3ea2134c..a818313a1f15 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -181,6 +181,7 @@ struct nvme_ctrl { const struct nvme_ctrl_ops *ops; struct request_queue *admin_q; struct request_queue *connect_q; + struct request_queue *fabrics_q; struct device *dev; int instance; int numa_node; diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 5143e2a5d54c..0ef05a75c428 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -751,6 +751,7 @@ static void nvme_rdma_destroy_admin_queue(struct nvme_rdma_ctrl *ctrl, { if (remove) { blk_cleanup_queue(ctrl->ctrl.admin_q); + blk_cleanup_queue(ctrl->ctrl.fabrics_q); blk_mq_free_tag_set(ctrl->ctrl.admin_tagset); } if (ctrl->async_event_sqe.data) { @@ -792,10 +793,16 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl, goto out_free_async_qe; } + ctrl->ctrl.fabrics_q = blk_mq_init_queue(&ctrl->admin_tag_set); + if (IS_ERR(ctrl->ctrl.fabrics_q)) { + error = PTR_ERR(ctrl->ctrl.fabrics_q); + goto out_free_tagset; + } + ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); if (IS_ERR(ctrl->ctrl.admin_q)) { error = PTR_ERR(ctrl->ctrl.admin_q); - goto out_free_tagset; + goto out_cleanup_fabrics_q; } } @@ -810,6 +817,8 @@ static int nvme_rdma_configure_admin_queue(struct nvme_rdma_ctrl *ctrl, ctrl->ctrl.max_hw_sectors = (ctrl->max_fr_pages - 1) << (ilog2(SZ_4K) - 9); + blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); + error = nvme_init_identify(&ctrl->ctrl); if (error) goto out_stop_queue; @@ -821,6 +830,9 @@ out_stop_queue: out_cleanup_queue: if (new) blk_cleanup_queue(ctrl->ctrl.admin_q); +out_cleanup_fabrics_q: + if (new) + blk_cleanup_queue(ctrl->ctrl.fabrics_q); out_free_tagset: if (new) blk_mq_free_tag_set(ctrl->ctrl.admin_tagset); @@ -895,7 +907,8 @@ static void nvme_rdma_teardown_admin_queue(struct nvme_rdma_ctrl *ctrl, nvme_cancel_request, &ctrl->ctrl); blk_mq_tagset_wait_completed_request(ctrl->ctrl.admin_tagset); } - blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); + if (remove) + blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); nvme_rdma_destroy_admin_queue(ctrl, remove); } @@ -1046,6 +1059,7 @@ static void nvme_rdma_error_recovery_work(struct work_struct *work) nvme_rdma_teardown_io_queues(ctrl, false); nvme_start_queues(&ctrl->ctrl); nvme_rdma_teardown_admin_queue(ctrl, false); + blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); if (!nvme_change_ctrl_state(&ctrl->ctrl, NVME_CTRL_CONNECTING)) { /* state change failure is ok if we're in DELETING state */ @@ -1858,6 +1872,7 @@ static void nvme_rdma_shutdown_ctrl(struct nvme_rdma_ctrl *ctrl, bool shutdown) cancel_delayed_work_sync(&ctrl->reconnect_work); nvme_rdma_teardown_io_queues(ctrl, shutdown); + blk_mq_quiesce_queue(ctrl->ctrl.admin_q); if (shutdown) nvme_shutdown_ctrl(&ctrl->ctrl); else diff --git a/drivers/nvme/host/tcp.c b/drivers/nvme/host/tcp.c index a9c3f28eedd7..2d8ba31cb691 100644 --- a/drivers/nvme/host/tcp.c +++ b/drivers/nvme/host/tcp.c @@ -1703,6 +1703,7 @@ static void nvme_tcp_destroy_admin_queue(struct nvme_ctrl *ctrl, bool remove) nvme_tcp_stop_queue(ctrl, 0); if (remove) { blk_cleanup_queue(ctrl->admin_q); + blk_cleanup_queue(ctrl->fabrics_q); blk_mq_free_tag_set(ctrl->admin_tagset); } nvme_tcp_free_admin_queue(ctrl); @@ -1723,10 +1724,16 @@ static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new) goto out_free_queue; } + ctrl->fabrics_q = blk_mq_init_queue(ctrl->admin_tagset); + if (IS_ERR(ctrl->fabrics_q)) { + error = PTR_ERR(ctrl->fabrics_q); + goto out_free_tagset; + } + ctrl->admin_q = blk_mq_init_queue(ctrl->admin_tagset); if (IS_ERR(ctrl->admin_q)) { error = PTR_ERR(ctrl->admin_q); - goto out_free_tagset; + goto out_cleanup_fabrics_q; } } @@ -1738,6 +1745,8 @@ static int nvme_tcp_configure_admin_queue(struct nvme_ctrl *ctrl, bool new) if (error) goto out_stop_queue; + blk_mq_unquiesce_queue(ctrl->admin_q); + error = nvme_init_identify(ctrl); if (error) goto out_stop_queue; @@ -1749,6 +1758,9 @@ out_stop_queue: out_cleanup_queue: if (new) blk_cleanup_queue(ctrl->admin_q); +out_cleanup_fabrics_q: + if (new) + blk_cleanup_queue(ctrl->fabrics_q); out_free_tagset: if (new) blk_mq_free_tag_set(ctrl->admin_tagset); @@ -1767,7 +1779,8 @@ static void nvme_tcp_teardown_admin_queue(struct nvme_ctrl *ctrl, nvme_cancel_request, ctrl); blk_mq_tagset_wait_completed_request(ctrl->admin_tagset); } - blk_mq_unquiesce_queue(ctrl->admin_q); + if (remove) + blk_mq_unquiesce_queue(ctrl->admin_q); nvme_tcp_destroy_admin_queue(ctrl, remove); } @@ -1894,6 +1907,7 @@ static void nvme_tcp_error_recovery_work(struct work_struct *work) /* unquiesce to fail fast pending requests */ nvme_start_queues(ctrl); nvme_tcp_teardown_admin_queue(ctrl, false); + blk_mq_unquiesce_queue(ctrl->admin_q); if (!nvme_change_ctrl_state(ctrl, NVME_CTRL_CONNECTING)) { /* state change failure is ok if we're in DELETING state */ @@ -1910,6 +1924,7 @@ static void nvme_tcp_teardown_ctrl(struct nvme_ctrl *ctrl, bool shutdown) cancel_delayed_work_sync(&to_tcp_ctrl(ctrl)->connect_work); nvme_tcp_teardown_io_queues(ctrl, shutdown); + blk_mq_quiesce_queue(ctrl->admin_q); if (shutdown) nvme_shutdown_ctrl(ctrl); else diff --git a/drivers/nvme/target/loop.c b/drivers/nvme/target/loop.c index ec0bc57d26fc..9ee093b9fc74 100644 --- a/drivers/nvme/target/loop.c +++ b/drivers/nvme/target/loop.c @@ -253,6 +253,7 @@ static void nvme_loop_destroy_admin_queue(struct nvme_loop_ctrl *ctrl) clear_bit(NVME_LOOP_Q_LIVE, &ctrl->queues[0].flags); nvmet_sq_destroy(&ctrl->queues[0].nvme_sq); blk_cleanup_queue(ctrl->ctrl.admin_q); + blk_cleanup_queue(ctrl->ctrl.fabrics_q); blk_mq_free_tag_set(&ctrl->admin_tag_set); } @@ -357,10 +358,16 @@ static int nvme_loop_configure_admin_queue(struct nvme_loop_ctrl *ctrl) goto out_free_sq; ctrl->ctrl.admin_tagset = &ctrl->admin_tag_set; + ctrl->ctrl.fabrics_q = blk_mq_init_queue(&ctrl->admin_tag_set); + if (IS_ERR(ctrl->ctrl.fabrics_q)) { + error = PTR_ERR(ctrl->ctrl.fabrics_q); + goto out_free_tagset; + } + ctrl->ctrl.admin_q = blk_mq_init_queue(&ctrl->admin_tag_set); if (IS_ERR(ctrl->ctrl.admin_q)) { error = PTR_ERR(ctrl->ctrl.admin_q); - goto out_free_tagset; + goto out_cleanup_fabrics_q; } error = nvmf_connect_admin_queue(&ctrl->ctrl); @@ -376,6 +383,8 @@ static int nvme_loop_configure_admin_queue(struct nvme_loop_ctrl *ctrl) ctrl->ctrl.max_hw_sectors = (NVME_LOOP_MAX_SEGMENTS - 1) << (PAGE_SHIFT - 9); + blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); + error = nvme_init_identify(&ctrl->ctrl); if (error) goto out_cleanup_queue; @@ -384,6 +393,8 @@ static int nvme_loop_configure_admin_queue(struct nvme_loop_ctrl *ctrl) out_cleanup_queue: blk_cleanup_queue(ctrl->ctrl.admin_q); +out_cleanup_fabrics_q: + blk_cleanup_queue(ctrl->ctrl.fabrics_q); out_free_tagset: blk_mq_free_tag_set(&ctrl->admin_tag_set); out_free_sq: @@ -401,14 +412,13 @@ static void nvme_loop_shutdown_ctrl(struct nvme_loop_ctrl *ctrl) nvme_loop_destroy_io_queues(ctrl); } + blk_mq_quiesce_queue(ctrl->ctrl.admin_q); if (ctrl->ctrl.state == NVME_CTRL_LIVE) nvme_shutdown_ctrl(&ctrl->ctrl); - blk_mq_quiesce_queue(ctrl->ctrl.admin_q); blk_mq_tagset_busy_iter(&ctrl->admin_tag_set, nvme_cancel_request, &ctrl->ctrl); blk_mq_tagset_wait_completed_request(&ctrl->admin_tag_set); - blk_mq_unquiesce_queue(ctrl->ctrl.admin_q); nvme_loop_destroy_admin_queue(ctrl); } -- cgit v1.2.3