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nvme: enable retries for authentication commands

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Authentication commands might trigger a lengthy computation on the
controller or even a callout to an external entity.
In these cases the controller might return a status without the DNR
bit set, indicating that the command should be retried.
This patch enables retries for authentication commands  by setting
NVME_SUBMIT_RETRY for __nvme_submit_sync_cmd().

Reported-by: Martin George <marting@netapp.com>
Signed-off-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Keith Busch <kbusch@kernel.org>
This commit is contained in:
Hannes Reinecke 2024-01-29 07:39:48 +01:00 committed by Keith Busch
parent bd2687f2e5
commit 48dae46676
3 changed files with 5 additions and 1 deletions
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2
drivers/nvme/host/auth.c
View file

@ -58,7 +58,7 @@ static int nvme_auth_submit(struct nvme_ctrl *ctrl, int qid,
void *data, size_t data_len, bool auth_send)
{
struct nvme_command cmd = {};
nvme_submit_flags_t flags = 0;
nvme_submit_flags_t flags = NVME_SUBMIT_RETRY;
struct request_queue *q = ctrl->fabrics_q;
int ret;

2
drivers/nvme/host/core.c
View file

@ -1070,6 +1070,8 @@ int __nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,
if (IS_ERR(req))
return PTR_ERR(req);
nvme_init_request(req, cmd);
if (flags & NVME_SUBMIT_RETRY)
req->cmd_flags &= ~REQ_FAILFAST_DRIVER;
if (buffer && bufflen) {
ret = blk_rq_map_kern(q, req, buffer, bufflen, GFP_KERNEL);

2
drivers/nvme/host/nvme.h
View file

@ -849,6 +849,8 @@ enum {
NVME_SUBMIT_NOWAIT = (__force nvme_submit_flags_t)(1 << 1),
/* Set BLK_MQ_REQ_RESERVED when allocating request */
NVME_SUBMIT_RESERVED = (__force nvme_submit_flags_t)(1 << 2),
/* Retry command when NVME_SC_DNR is not set in the result */
NVME_SUBMIT_RETRY = (__force nvme_submit_flags_t)(1 << 3),
};
int nvme_submit_sync_cmd(struct request_queue *q, struct nvme_command *cmd,