From f79d5fda4ea08c33a114087573d86f703149ee0e Mon Sep 17 00:00:00 2001 From: Akinobu Mita Date: Sun, 9 Jun 2019 23:17:01 +0900 Subject: [PATCH] nvme: enable to inject errors into admin commands This enables to inject errors into the commands submitted to the admin queue. It is useful to test error handling in the controller initialization. # echo 100 > /sys/kernel/debug/nvme0/fault_inject/probability # echo 1 > /sys/kernel/debug/nvme0/fault_inject/times # echo 10 > /sys/kernel/debug/nvme0/fault_inject/space # nvme reset /dev/nvme0 # dmesg ... nvme nvme0: Could not set queue count (16385) nvme nvme0: IO queues not created Signed-off-by: Akinobu Mita Reviewed-by: Minwoo Im Reviewed-by: Sagi Grimberg Reviewed-by: Chaitanya Kulkarni Reviewed-by: Christoph Hellwig Signed-off-by: Christoph Hellwig --- drivers/nvme/host/core.c | 3 +++ drivers/nvme/host/fault_inject.c | 5 ++--- drivers/nvme/host/nvme.h | 2 ++ 3 files changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 625605f8..b2dd4e3 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3722,6 +3722,7 @@ EXPORT_SYMBOL_GPL(nvme_start_ctrl); void nvme_uninit_ctrl(struct nvme_ctrl *ctrl) { + nvme_fault_inject_fini(&ctrl->fault_inject); dev_pm_qos_hide_latency_tolerance(ctrl->device); cdev_device_del(&ctrl->cdev, ctrl->device); } @@ -3817,6 +3818,8 @@ int nvme_init_ctrl(struct nvme_ctrl *ctrl, struct device *dev, dev_pm_qos_update_user_latency_tolerance(ctrl->device, min(default_ps_max_latency_us, (unsigned long)S32_MAX)); + nvme_fault_inject_init(&ctrl->fault_inject, dev_name(ctrl->device)); + return 0; out_free_name: kfree_const(ctrl->device->kobj.name); diff --git a/drivers/nvme/host/fault_inject.c b/drivers/nvme/host/fault_inject.c index e37b8c2..1352159 100644 --- a/drivers/nvme/host/fault_inject.c +++ b/drivers/nvme/host/fault_inject.c @@ -60,9 +60,6 @@ void nvme_should_fail(struct request *req) struct nvme_fault_inject *fault_inject = NULL; u16 status; - /* - * make sure this request is coming from a valid namespace - */ if (disk) { struct nvme_ns *ns = disk->private_data; @@ -70,6 +67,8 @@ void nvme_should_fail(struct request *req) fault_inject = &ns->fault_inject; else WARN_ONCE(1, "No namespace found for request\n"); + } else { + fault_inject = &nvme_req(req)->ctrl->fault_inject; } if (fault_inject && should_fail(&fault_inject->attr, 1)) { diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index 8f90757..ea45d7d 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -256,6 +256,8 @@ struct nvme_ctrl { struct page *discard_page; unsigned long discard_page_busy; + + struct nvme_fault_inject fault_inject; }; enum nvme_iopolicy { -- 2.7.4