[PATCH] nvme-auth: don't use NVMe status codes

[Hannes Reinecke <hare@suse.de>]

NVMe status codes are part of the wire protocol, and shouldn't be
fabricated in the stack. So with this patch the authentication code
is switched over to use error codes; as a side effect authentication
failures due to internal error won't be retried anymore.
But that shouldn't have happened anyway.

Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 drivers/nvme/host/auth.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/nvme/host/auth.c b/drivers/nvme/host/auth.c
index bb0abbe4491c..980f9125b751 100644
--- a/drivers/nvme/host/auth.c
+++ b/drivers/nvme/host/auth.c
@@ -158,7 +158,7 @@ static int nvme_auth_process_dhchap_challenge(struct nvme_ctrl *ctrl,
 
 	if (size > CHAP_BUF_SIZE) {
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_INCORRECT_PAYLOAD;
-		return NVME_SC_INVALID_FIELD;
+		return -EINVAL;
 	}
 
 	hmac_name = nvme_auth_hmac_name(data->hashid);
@@ -167,7 +167,7 @@ static int nvme_auth_process_dhchap_challenge(struct nvme_ctrl *ctrl,
 			 "qid %d: invalid HASH ID %d\n",
 			 chap->qid, data->hashid);
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_HASH_UNUSABLE;
-		return NVME_SC_INVALID_FIELD;
+		return -EPROTO;
 	}
 
 	if (chap->hash_id == data->hashid && chap->shash_tfm &&
@@ -193,7 +193,7 @@ static int nvme_auth_process_dhchap_challenge(struct nvme_ctrl *ctrl,
 			 chap->qid, hmac_name, PTR_ERR(chap->shash_tfm));
 		chap->shash_tfm = NULL;
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_FAILED;
-		return NVME_SC_AUTH_REQUIRED;
+		return -ENOMEM;
 	}
 
 	if (crypto_shash_digestsize(chap->shash_tfm) != data->hl) {
@@ -203,7 +203,7 @@ static int nvme_auth_process_dhchap_challenge(struct nvme_ctrl *ctrl,
 		crypto_free_shash(chap->shash_tfm);
 		chap->shash_tfm = NULL;
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_HASH_UNUSABLE;
-		return NVME_SC_AUTH_REQUIRED;
+		return -EPROTO;
 	}
 
 	chap->hash_id = data->hashid;
@@ -219,7 +219,7 @@ static int nvme_auth_process_dhchap_challenge(struct nvme_ctrl *ctrl,
 			 chap->qid, data->dhgid);
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_DHGROUP_UNUSABLE;
 		/* Leave previous dh_tfm intact */
-		return NVME_SC_AUTH_REQUIRED;
+		return -EPROTO;
 	}
 
 	if (chap->dhgroup_id == data->dhgid &&
@@ -242,7 +242,7 @@ static int nvme_auth_process_dhchap_challenge(struct nvme_ctrl *ctrl,
 				 "qid %d: empty DH value\n",
 				 chap->qid);
 			chap->status = NVME_AUTH_DHCHAP_FAILURE_DHGROUP_UNUSABLE;
-			return NVME_SC_INVALID_FIELD;
+			return -EPROTO;
 		}
 
 		chap->dh_tfm = crypto_alloc_kpp(kpp_name, 0, 0);
@@ -254,7 +254,7 @@ static int nvme_auth_process_dhchap_challenge(struct nvme_ctrl *ctrl,
 				 chap->qid, ret, gid_name);
 			chap->status = NVME_AUTH_DHCHAP_FAILURE_DHGROUP_UNUSABLE;
 			chap->dh_tfm = NULL;
-			return NVME_SC_AUTH_REQUIRED;
+			return -ret;
 		}
 		dev_dbg(ctrl->device, "qid %d: selected DH group %s\n",
 			chap->qid, gid_name);
@@ -263,7 +263,7 @@ static int nvme_auth_process_dhchap_challenge(struct nvme_ctrl *ctrl,
 			 "qid %d: invalid DH value for NULL DH\n",
 			 chap->qid);
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_INCORRECT_PAYLOAD;
-		return NVME_SC_INVALID_FIELD;
+		return -EPROTO;
 	}
 	chap->dhgroup_id = data->dhgid;
 
@@ -274,7 +274,7 @@ static int nvme_auth_process_dhchap_challenge(struct nvme_ctrl *ctrl,
 		chap->ctrl_key = kmalloc(dhvlen, GFP_KERNEL);
 		if (!chap->ctrl_key) {
 			chap->status = NVME_AUTH_DHCHAP_FAILURE_FAILED;
-			return NVME_SC_AUTH_REQUIRED;
+			return -ENOMEM;
 		}
 		chap->ctrl_key_len = dhvlen;
 		memcpy(chap->ctrl_key, data->cval + chap->hash_len,
@@ -344,7 +344,7 @@ static int nvme_auth_process_dhchap_success1(struct nvme_ctrl *ctrl,
 
 	if (size > CHAP_BUF_SIZE) {
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_INCORRECT_PAYLOAD;
-		return NVME_SC_INVALID_FIELD;
+		return -EINVAL;
 	}
 
 	if (data->hl != chap->hash_len) {
@@ -352,7 +352,7 @@ static int nvme_auth_process_dhchap_success1(struct nvme_ctrl *ctrl,
 			 "qid %d: invalid hash length %u\n",
 			 chap->qid, data->hl);
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_HASH_UNUSABLE;
-		return NVME_SC_INVALID_FIELD;
+		return -EPROTO;
 	}
 
 	/* Just print out information for the admin queue */
@@ -376,7 +376,7 @@ static int nvme_auth_process_dhchap_success1(struct nvme_ctrl *ctrl,
 			 "qid %d: controller authentication failed\n",
 			 chap->qid);
 		chap->status = NVME_AUTH_DHCHAP_FAILURE_FAILED;
-		return NVME_SC_AUTH_REQUIRED;
+		return -ECONNREFUSED;
 	}
 
 	/* Just print out information for the admin queue */
@@ -730,7 +730,7 @@ static void nvme_queue_auth_work(struct work_struct *work)
 					 NVME_AUTH_DHCHAP_MESSAGE_CHALLENGE);
 	if (ret) {
 		chap->status = ret;
-		chap->error = NVME_SC_AUTH_REQUIRED;
+		chap->error = -ECONNREFUSED;
 		return;
 	}
 
@@ -798,7 +798,7 @@ static void nvme_queue_auth_work(struct work_struct *work)
 					 NVME_AUTH_DHCHAP_MESSAGE_SUCCESS1);
 	if (ret) {
 		chap->status = ret;
-		chap->error = NVME_SC_AUTH_REQUIRED;
+		chap->error = -ECONNREFUSED;
 		return;
 	}
 
@@ -819,7 +819,7 @@ static void nvme_queue_auth_work(struct work_struct *work)
 	ret = nvme_auth_process_dhchap_success1(ctrl, chap);
 	if (ret) {
 		/* Controller authentication failed */
-		chap->error = NVME_SC_AUTH_REQUIRED;
+		chap->error = -ECONNREFUSED;
 		goto fail2;
 	}
 
-- 
2.35.3