linux-kernel - [PATCH v3 1/3] nvme-auth: auth success1 msg always includes resp

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Date:   Wed, 25 Oct 2023 10:51:23 +0000
From:   Mark O'Donovan <shiftee@...teo.net>
To:     linux-kernel@...r.kernel.org
Cc:     linux-nvme@...ts.infradead.org, sagi@...mberg.me, hch@....de,
        axboe@...nel.dk, kbusch@...nel.org, hare@...e.de,
        Mark O'Donovan <shiftee@...teo.net>
Subject: [PATCH v3 1/3] nvme-auth: auth success1 msg always includes resp

In cases where RVALID is false, the response is still transmitted,
but is cleared to zero.

Relevant extract from the spec:
Response R2, if valid (i.e., if the RVALID field is set to 01h),
cleared to 0h otherwise

Signed-off-by: Mark O'Donovan <shiftee@...teo.net>
Reviewed-by: Hannes Reinecke <hare@...e.de>
Reviewed-by: Sagi Grimberg <sagi@...mberg.me>
Reviewed-by: Christoph Hellwig <hch@....de>

---
v1: used incorrect prefix nvme-tcp
v2: rebase on latest git

 drivers/nvme/host/auth.c | 5 +----
 include/linux/nvme.h     | 2 +-
 2 files changed, 2 insertions(+), 5 deletions(-)

diff --git a/drivers/nvme/host/auth.c b/drivers/nvme/host/auth.c
index 064592a5d546..e0fc33d41baa 100644
--- a/drivers/nvme/host/auth.c
+++ b/drivers/nvme/host/auth.c
@@ -339,10 +339,7 @@ static int nvme_auth_process_dhchap_success1(struct nvme_ctrl *ctrl,
 		struct nvme_dhchap_queue_context *chap)
 {
 	struct nvmf_auth_dhchap_success1_data *data = chap->buf;
-	size_t size = sizeof(*data);
-
-	if (chap->s2)
-		size += chap->hash_len;
+	size_t size = sizeof(*data) + chap->hash_len;
 
 	if (size > CHAP_BUF_SIZE) {
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_INCORRECT_PAYLOAD;
diff --git a/include/linux/nvme.h b/include/linux/nvme.h
index 26dd3f859d9d..8d8df9c15b74 100644
--- a/include/linux/nvme.h
+++ b/include/linux/nvme.h
@@ -1722,7 +1722,7 @@ struct nvmf_auth_dhchap_success1_data {
 	__u8		rsvd2;
 	__u8		rvalid;
 	__u8		rsvd3[7];
-	/* 'hl' bytes of response value if 'rvalid' is set */
+	/* 'hl' bytes of response value */
 	__u8		rval[];
 };
 
-- 
2.39.2