[PATCH] nvme-fabrics: don't fast fail on ctrl state DELETING

[PATCH] nvme-fabrics: don't fast fail on ctrl state DELETING

[Sagi Grimberg]

This is now an state that allows for I/O to be sent to the
device, and when the device shall transition into
NVME_CTRL_DELETING_NOIO we shall fail the I/O.

Note that this is fine because the transport itself has
a queue state to protect against queue access.

Reported-by: Logan Gunthorpe <logang@deltatee.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
---
 drivers/nvme/host/fabrics.h | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

Christoph: this should probably be folded into
97e9bb2b27bc ("nvme: fix deadlock in disconnect during scan_work and/or ana_work")

diff --git a/drivers/nvme/host/fabrics.h b/drivers/nvme/host/fabrics.h
index a0ec40ab62ee..a9c1e3b4585e 100644
--- a/drivers/nvme/host/fabrics.h
+++ b/drivers/nvme/host/fabrics.h
@@ -182,7 +182,8 @@ bool nvmf_ip_options_match(struct nvme_ctrl *ctrl,
 static inline bool nvmf_check_ready(struct nvme_ctrl *ctrl, struct request *rq,
 		bool queue_live)
 {
-	if (likely(ctrl->state == NVME_CTRL_LIVE))
+	if (likely(ctrl->state == NVME_CTRL_LIVE ||
+		   ctrl->state == NVME_CTRL_DELETING))
 		return true;
 	return __nvmf_check_ready(ctrl, rq, queue_live);
 }
-- 
2.25.1


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Re: [PATCH] nvme-fabrics: don't fast fail on ctrl state DELETING

[Christoph Hellwig]

On Fri, Jul 24, 2020 at 09:32:10AM -0700, Sagi Grimberg wrote:
> This is now an state that allows for I/O to be sent to the
> device, and when the device shall transition into
> NVME_CTRL_DELETING_NOIO we shall fail the I/O.
> 
> Note that this is fine because the transport itself has
> a queue state to protect against queue access.
> 
> Reported-by: Logan Gunthorpe <logang@deltatee.com>
> Signed-off-by: Sagi Grimberg <sagi@grimberg.me>

I've folded this into the original patch adding
NVME_CTRL_DELETING_NOIO, thanks.

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