nvme fixes for Linux 6.3

- don't access released socket during error recovery (Akinobu Mita)
  - bring back auto-removal of deleted namespaces during sequential scan
    (Christoph Hellwig)
  - fix an error code in nvme_auth_process_dhchap_challenge
    (Dan Carpenter)
  - show well known discovery name (Daniel Wagner)
  - add a missing endianess conversion in effects masking (Keith Busch)
 -----BEGIN PGP SIGNATURE-----
 
 iQI/BAABCgApFiEEgdbnc3r/njty3Iq9D55TZVIEUYMFAmP/VxYLHGhjaEBsc3Qu
 ZGUACgkQD55TZVIEUYPMGg/9FzgFNAelrt2wlSTnC9mpPh+HnSK5SsUHLuDIbEuS
 w5Kd1MHdsL1uV7qZkJUmZu96MiwvzGQ28QTBs9daCQvE6D9kZBJxkCMFmU7v3HYs
 mfOuVebOEuEQDRaqn4YEN3KH0eaa1R2MeyxMyo9kJaawd2jjM8E5cZSOG5j8xxCt
 sECqm2jjTAsOZgG3L8R8hn0T95zTq1lHQ/Gw9sbIMbrMfDLgarHdeKo5vR2YdMMK
 AcskGXoEKjOjsIk011E+KDJDwX4kj8Iz3KuA3RU0y2xmDm/WGUNEuhsipkH5Mv+m
 2Fg7ZsPo11GJ7wO+xDlRhCYHA15Yrcmg1CRraKetoxbsBIRWudpDpNuboKWyaG8w
 sDcikGH0ZlG16p7l25EbhnC7yt4xc8W37gPkJBGXEV1gGFA9H8EhtguDJLrdXxMi
 imR3I9HS03QewPrnd1wn7AE/aSVWwOckve+uJgdkLh2sgH8Q7VfsVzn+h+YKquWo
 PxNKeAOWSQZ44Y7mEk2fA/aeH84fJVCJh/pLr80VsGlYPhIGkxvX4BUNCRXO15sB
 zef0bZLY+73HOMkMBPKCkPJG7fR7NXwP+zZdRdAqOhAy5JRwYcNdsH36Zm67faov
 skvYvaRm0+R5hX0LmLB6CzwCuKuQrMiEVjHAQmsw9UHoW2yqdGanljQDm5sHSyyg
 12M=
 =1zfV
 -----END PGP SIGNATURE-----

Merge tag 'nvme-6.3-2022-03-01' of git://git.infradead.org/nvme into for-6.3/block

Pull NVMe fixes from Christoph:

"nvme fixes for Linux 6.3

 - don't access released socket during error recovery (Akinobu Mita)
 - bring back auto-removal of deleted namespaces during sequential scan
   (Christoph Hellwig)
 - fix an error code in nvme_auth_process_dhchap_challenge
   (Dan Carpenter)
 - show well known discovery name (Daniel Wagner)
 - add a missing endianess conversion in effects masking (Keith Busch)"

* tag 'nvme-6.3-2022-03-01' of git://git.infradead.org/nvme:
  nvme-fabrics: show well known discovery name
  nvme-tcp: don't access released socket during error recovery
  nvme-auth: fix an error code in nvme_auth_process_dhchap_challenge()
  nvme: bring back auto-removal of deleted namespaces during sequential scan
  nvme: fix sparse warning on effects masking

drivers/nvme/host/auth.c

@@ -254,7 +254,7 @@ select_kpp:
 				 chap->qid, ret, gid_name);
 			chap->status = NVME_AUTH_DHCHAP_FAILURE_DHGROUP_UNUSABLE;
 			chap->dh_tfm = NULL;
-			return -ret;
+			return ret;
 		}
 		dev_dbg(ctrl->device, "qid %d: selected DH group %s\n",
 			chap->qid, gid_name);

drivers/nvme/host/core.c

@@ -38,6 +38,7 @@ struct nvme_ns_info {
 	bool is_shared;
 	bool is_readonly;
 	bool is_ready;
+	bool is_removed;
 };
 
 unsigned int admin_timeout = 60;
@@ -1402,16 +1403,8 @@ static int nvme_identify_ns(struct nvme_ctrl *ctrl, unsigned nsid,
 	error = nvme_submit_sync_cmd(ctrl->admin_q, &c, *id, sizeof(**id));
 	if (error) {
 		dev_warn(ctrl->device, "Identify namespace failed (%d)\n", error);
-		goto out_free_id;
+		kfree(*id);
 	}
-
-	error = NVME_SC_INVALID_NS | NVME_SC_DNR;
-	if ((*id)->ncap == 0) /* namespace not allocated or attached */
-		goto out_free_id;
-	return 0;
-
-out_free_id:
-	kfree(*id);
 	return error;
 }
 
@@ -1425,6 +1418,13 @@ static int nvme_ns_info_from_identify(struct nvme_ctrl *ctrl,
 	ret = nvme_identify_ns(ctrl, info->nsid, &id);
 	if (ret)
 		return ret;
+
+	if (id->ncap == 0) {
+		/* namespace not allocated or attached */
+		info->is_removed = true;
+		return -ENODEV;
+	}
+
 	info->anagrpid = id->anagrpid;
 	info->is_shared = id->nmic & NVME_NS_NMIC_SHARED;
 	info->is_readonly = id->nsattr & NVME_NS_ATTR_RO;
@@ -3104,7 +3104,7 @@ static void nvme_init_known_nvm_effects(struct nvme_ctrl *ctrl)
 	 * Rather than blindly freezing the IO queues for this effect that
 	 * doesn't even apply to IO, mask it off.
 	 */
-	log->acs[nvme_admin_security_recv] &= ~NVME_CMD_EFFECTS_CSE_MASK;
+	log->acs[nvme_admin_security_recv] &= cpu_to_le32(~NVME_CMD_EFFECTS_CSE_MASK);
 
 	log->iocs[nvme_cmd_write] |= cpu_to_le32(NVME_CMD_EFFECTS_LBCC);
 	log->iocs[nvme_cmd_write_zeroes] |= cpu_to_le32(NVME_CMD_EFFECTS_LBCC);
@@ -4429,6 +4429,7 @@ static void nvme_scan_ns(struct nvme_ctrl *ctrl, unsigned nsid)
 {
 	struct nvme_ns_info info = { .nsid = nsid };
 	struct nvme_ns *ns;
+	int ret;
 
 	if (nvme_identify_ns_descs(ctrl, &info))
 		return;
@@ -4445,19 +4446,19 @@ static void nvme_scan_ns(struct nvme_ctrl *ctrl, unsigned nsid)
 	 * set up a namespace.  If not fall back to the legacy version.
 	 */
 	if ((ctrl->cap & NVME_CAP_CRMS_CRIMS) ||
-	    (info.ids.csi != NVME_CSI_NVM && info.ids.csi != NVME_CSI_ZNS)) {
-		if (nvme_ns_info_from_id_cs_indep(ctrl, &info))
-			return;
-	} else {
-		if (nvme_ns_info_from_identify(ctrl, &info))
-			return;
-	}
+	    (info.ids.csi != NVME_CSI_NVM && info.ids.csi != NVME_CSI_ZNS))
+		ret = nvme_ns_info_from_id_cs_indep(ctrl, &info);
+	else
+		ret = nvme_ns_info_from_identify(ctrl, &info);
+
+	if (info.is_removed)
+		nvme_ns_remove_by_nsid(ctrl, nsid);
 
 	/*
 	 * Ignore the namespace if it is not ready. We will get an AEN once it
 	 * becomes ready and restart the scan.
 	 */
-	if (!info.is_ready)
+	if (ret || !info.is_ready)
 		return;
 
 	ns = nvme_find_get_ns(ctrl, nsid);

drivers/nvme/host/fabrics.h

@@ -189,7 +189,8 @@ nvmf_ctlr_matches_baseopts(struct nvme_ctrl *ctrl,
 
 static inline char *nvmf_ctrl_subsysnqn(struct nvme_ctrl *ctrl)
 {
-	if (!ctrl->subsys)
+	if (!ctrl->subsys ||
+	    !strcmp(ctrl->opts->subsysnqn, NVME_DISC_SUBSYS_NAME))
 		return ctrl->opts->subsysnqn;
 	return ctrl->subsys->subnqn;
 }

drivers/nvme/host/tcp.c

@@ -2489,6 +2489,10 @@ static int nvme_tcp_get_address(struct nvme_ctrl *ctrl, char *buf, int size)
 
 	len = nvmf_get_address(ctrl, buf, size);
 
+	mutex_lock(&queue->queue_lock);
+
+	if (!test_bit(NVME_TCP_Q_LIVE, &queue->flags))
+		goto done;
 	ret = kernel_getsockname(queue->sock, (struct sockaddr *)&src_addr);
 	if (ret > 0) {
 		if (len > 0)
@@ -2496,6 +2500,8 @@ static int nvme_tcp_get_address(struct nvme_ctrl *ctrl, char *buf, int size)
 		len += scnprintf(buf + len, size - len, "%ssrc_addr=%pISc\n",
 				(len) ? "," : "", &src_addr);
 	}
+done:
+	mutex_unlock(&queue->queue_lock);
 
 	return len;
 }