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nvme: enable to inject errors into admin commands

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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 <akinobu.mita@gmail.com>
Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Akinobu Mita
2019-06-09 23:17:01 +09:00
committed by Christoph Hellwig
parent a3646451ed
commit f79d5fda4e
3 changed files with 7 additions and 3 deletions
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2
drivers/nvme/host/nvme.h
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@@ -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 {