From: Ming Lei <ming.lei@redhat.com> To: Keith Busch <keith.busch@intel.com> Cc: Jens Axboe <axboe@kernel.dk>, linux-block@vger.kernel.org, Ming Lei <ming.lei@redhat.com>, James Smart <james.smart@broadcom.com>, Jianchao Wang <jianchao.w.wang@oracle.com>, Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>, linux-nvme@lists.infradead.org, Laurence Oberman <loberman@redhat.com> Subject: [PATCH V6 10/11] nvme: core: introduce nvme_force_change_ctrl_state() Date: Wed, 16 May 2018 12:03:12 +0800 [thread overview] Message-ID: <20180516040313.13596-11-ming.lei@redhat.com> (raw) In-Reply-To: <20180516040313.13596-1-ming.lei@redhat.com> When controller is being reset, timeout still may be triggered, for handling this situation, the contoller state has to be changed to NVME_CTRL_RESETTING first. So introduce nvme_force_change_ctrl_state() for this purpose. Cc: James Smart <james.smart@broadcom.com> Cc: Jianchao Wang <jianchao.w.wang@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Sagi Grimberg <sagi@grimberg.me> Cc: linux-nvme@lists.infradead.org Cc: Laurence Oberman <loberman@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> --- drivers/nvme/host/core.c | 33 +++++++++++++++++++++++++++++++++ drivers/nvme/host/nvme.h | 2 ++ 2 files changed, 35 insertions(+) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 3b0cf2fd3f53..9e51c3e1f534 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -256,6 +256,39 @@ void nvme_cancel_request(struct request *req, void *data, bool reserved) } EXPORT_SYMBOL_GPL(nvme_cancel_request); +/* should only be used by EH for handling error during reset */ +void nvme_force_change_ctrl_state(struct nvme_ctrl *ctrl, + enum nvme_ctrl_state new_state) +{ + enum nvme_ctrl_state old_state; + unsigned long flags; + bool warn = true; + + spin_lock_irqsave(&ctrl->lock, flags); + old_state = ctrl->state; + switch (new_state) { + case NVME_CTRL_RESETTING: + switch (old_state) { + case NVME_CTRL_LIVE: + case NVME_CTRL_ADMIN_ONLY: + case NVME_CTRL_RESETTING: + case NVME_CTRL_CONNECTING: + warn = false; + break; + default: + break; + } + default: + break; + } + if (warn) + WARN(1, "Make sure you want to change to %d from %d\n", + new_state, old_state); + ctrl->state = new_state; + spin_unlock_irqrestore(&ctrl->lock, flags); +} +EXPORT_SYMBOL_GPL(nvme_force_change_ctrl_state); + bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, enum nvme_ctrl_state new_state) { diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index b00a56412bab..715239226f4c 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -390,6 +390,8 @@ void nvme_complete_rq(struct request *req); void nvme_cancel_request(struct request *req, void *data, bool reserved); bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, enum nvme_ctrl_state new_state); +void nvme_force_change_ctrl_state(struct nvme_ctrl *ctrl, + enum nvme_ctrl_state new_state); int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap); int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap); int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl); -- 2.9.5
WARNING: multiple messages have this Message-ID (diff)
From: ming.lei@redhat.com (Ming Lei) Subject: [PATCH V6 10/11] nvme: core: introduce nvme_force_change_ctrl_state() Date: Wed, 16 May 2018 12:03:12 +0800 [thread overview] Message-ID: <20180516040313.13596-11-ming.lei@redhat.com> (raw) In-Reply-To: <20180516040313.13596-1-ming.lei@redhat.com> When controller is being reset, timeout still may be triggered, for handling this situation, the contoller state has to be changed to NVME_CTRL_RESETTING first. So introduce nvme_force_change_ctrl_state() for this purpose. Cc: James Smart <james.smart at broadcom.com> Cc: Jianchao Wang <jianchao.w.wang at oracle.com> Cc: Christoph Hellwig <hch at lst.de> Cc: Sagi Grimberg <sagi at grimberg.me> Cc: linux-nvme at lists.infradead.org Cc: Laurence Oberman <loberman at redhat.com> Signed-off-by: Ming Lei <ming.lei at redhat.com> --- drivers/nvme/host/core.c | 33 +++++++++++++++++++++++++++++++++ drivers/nvme/host/nvme.h | 2 ++ 2 files changed, 35 insertions(+) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 3b0cf2fd3f53..9e51c3e1f534 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -256,6 +256,39 @@ void nvme_cancel_request(struct request *req, void *data, bool reserved) } EXPORT_SYMBOL_GPL(nvme_cancel_request); +/* should only be used by EH for handling error during reset */ +void nvme_force_change_ctrl_state(struct nvme_ctrl *ctrl, + enum nvme_ctrl_state new_state) +{ + enum nvme_ctrl_state old_state; + unsigned long flags; + bool warn = true; + + spin_lock_irqsave(&ctrl->lock, flags); + old_state = ctrl->state; + switch (new_state) { + case NVME_CTRL_RESETTING: + switch (old_state) { + case NVME_CTRL_LIVE: + case NVME_CTRL_ADMIN_ONLY: + case NVME_CTRL_RESETTING: + case NVME_CTRL_CONNECTING: + warn = false; + break; + default: + break; + } + default: + break; + } + if (warn) + WARN(1, "Make sure you want to change to %d from %d\n", + new_state, old_state); + ctrl->state = new_state; + spin_unlock_irqrestore(&ctrl->lock, flags); +} +EXPORT_SYMBOL_GPL(nvme_force_change_ctrl_state); + bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, enum nvme_ctrl_state new_state) { diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index b00a56412bab..715239226f4c 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -390,6 +390,8 @@ void nvme_complete_rq(struct request *req); void nvme_cancel_request(struct request *req, void *data, bool reserved); bool nvme_change_ctrl_state(struct nvme_ctrl *ctrl, enum nvme_ctrl_state new_state); +void nvme_force_change_ctrl_state(struct nvme_ctrl *ctrl, + enum nvme_ctrl_state new_state); int nvme_disable_ctrl(struct nvme_ctrl *ctrl, u64 cap); int nvme_enable_ctrl(struct nvme_ctrl *ctrl, u64 cap); int nvme_shutdown_ctrl(struct nvme_ctrl *ctrl); -- 2.9.5
next prev parent reply other threads:[~2018-05-16 4:03 UTC|newest] Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-05-16 4:03 [PATCH V6 00/11] nvme: pci: fix & improve timeout handling Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 4:03 ` [PATCH V6 01/11] block: introduce blk_quiesce_timeout() and blk_unquiesce_timeout() Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 4:03 ` [PATCH V6 02/11] nvme: pci: cover timeout for admin commands running in EH Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-24 15:39 ` Keith Busch 2018-05-24 15:39 ` Keith Busch 2018-05-16 4:03 ` [PATCH V6 03/11] nvme: pci: unquiesce admin queue after controller is shutdown Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 4:03 ` [PATCH V6 04/11] nvme: pci: set nvmeq->cq_vector after alloc cq/sq Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 4:03 ` [PATCH V6 05/11] nvme: pci: only wait freezing if queue is frozen Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 4:03 ` [PATCH V6 06/11] nvme: pci: freeze queue in nvme_dev_disable() in case of error recovery Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 4:03 ` [PATCH V6 07/11] nvme: pci: prepare for supporting error recovery from resetting context Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 4:03 ` [PATCH V6 08/11] nvme: pci: move error handling out of nvme_reset_dev() Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 4:03 ` [PATCH V6 09/11] nvme: pci: don't unfreeze queue until controller state updating succeeds Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 4:03 ` Ming Lei [this message] 2018-05-16 4:03 ` [PATCH V6 10/11] nvme: core: introduce nvme_force_change_ctrl_state() Ming Lei 2018-05-16 4:03 ` [PATCH V6 11/11] nvme: pci: support nested EH Ming Lei 2018-05-16 4:03 ` Ming Lei 2018-05-16 14:12 ` Keith Busch 2018-05-16 14:12 ` Keith Busch 2018-05-16 23:10 ` Ming Lei 2018-05-16 23:10 ` Ming Lei 2018-05-17 2:20 ` Keith Busch 2018-05-17 2:20 ` Keith Busch 2018-05-17 8:41 ` Christoph Hellwig 2018-05-17 8:41 ` Christoph Hellwig 2018-05-17 14:20 ` Keith Busch 2018-05-17 14:20 ` Keith Busch 2018-05-17 14:20 ` Keith Busch 2018-05-17 14:23 ` Johannes Thumshirn 2018-05-17 14:23 ` Johannes Thumshirn 2018-05-17 14:23 ` Johannes Thumshirn 2018-05-18 16:28 ` Keith Busch 2018-05-18 16:28 ` Keith Busch 2018-05-18 16:28 ` Keith Busch 2018-05-22 7:35 ` Johannes Thumshirn 2018-05-22 7:35 ` Johannes Thumshirn 2018-05-22 7:35 ` Johannes Thumshirn 2018-05-18 0:20 ` Ming Lei 2018-05-18 0:20 ` Ming Lei 2018-05-18 1:01 ` Ming Lei 2018-05-18 1:01 ` Ming Lei 2018-05-18 13:57 ` Keith Busch 2018-05-18 13:57 ` Keith Busch 2018-05-18 16:58 ` Jens Axboe 2018-05-18 16:58 ` Jens Axboe 2018-05-18 22:26 ` Ming Lei 2018-05-18 22:26 ` Ming Lei 2018-05-18 23:45 ` Keith Busch 2018-05-18 23:45 ` Keith Busch 2018-05-18 23:51 ` Ming Lei 2018-05-18 23:51 ` Ming Lei
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