Commits
James Smart committed 6cdefc6e2ad
nvme: if_ready checks to fail io to deleting controller
The revised if_ready checks skipped over the case of returning error when
the controller is being deleted. Instead it was returning BUSY, which
caused the ios to retry, which caused the ns delete to hang waiting for
the ios to drain.
Stack trace of hang looks like:
kworker/u64:2 D 0 74 2 0x80000000
Workqueue: nvme-delete-wq nvme_delete_ctrl_work [nvme_core]
Call Trace:
? __schedule+0x26d/0x820
schedule+0x32/0x80
blk_mq_freeze_queue_wait+0x36/0x80
? remove_wait_queue+0x60/0x60
blk_cleanup_queue+0x72/0x160
nvme_ns_remove+0x106/0x140 [nvme_core]
nvme_remove_namespaces+0x7e/0xa0 [nvme_core]
nvme_delete_ctrl_work+0x4d/0x80 [nvme_core]
process_one_work+0x160/0x350
worker_thread+0x1c3/0x3d0
kthread+0xf5/0x130
? process_one_work+0x350/0x350
? kthread_bind+0x10/0x10
ret_from_fork+0x1f/0x30
Extend nvmf_fail_nonready_command() to supply the controller pointer so
that the controller state can be looked at. Fail any io to a controller
that is deleting.
Fixes: 3bc32bb1186c ("nvme-fabrics: refactor queue ready check")
Fixes: 35897b920c8a ("nvme-fabrics: fix and refine state checks in __nvmf_check_ready")
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Ewan D. Milne <emilne@redhat.com>
Reviewed-by: Ewan D. Milne <emilne@redhat.com>