cifs: add a debug macro that prints \\server\share for errors

Where we have a tcon available we can log \\server\share as part
of the message. Only do this for the VFS log level.

Signed-off-by: Ronnie Sahlberg <[e-mail]>
Signed-off-by: Steve French <[e-mail]>

fs/cifs/cifs_debug.h

···
 
 #define cifs_server_dbg_func(ratefunc, type, fmt, ...)		\
 do {								\
+	const char *sn = "";					\
+	if (server && server->hostname)				\
+		sn = server->hostname;				\
 	if ((type) & FYI && cifsFYI & CIFS_INFO) {		\
-		pr_debug_ ## ratefunc("%s: Server:%s "	fmt,	\
-			__FILE__, server->hostname, ##__VA_ARGS__);\
+		pr_debug_ ## ratefunc("%s: \\\\%s "	fmt,	\
+			__FILE__, sn, ##__VA_ARGS__);		\
 	} else if ((type) & VFS) {				\
-		pr_err_ ## ratefunc("CIFS VFS: Server:%s " fmt,	\
-			server->hostname, ##__VA_ARGS__);	\
+		pr_err_ ## ratefunc("CIFS VFS: \\\\%s " fmt,	\
+			sn, ##__VA_ARGS__);			\
 	} else if ((type) & NOISY && (NOISY != 0)) {		\
-		pr_debug_ ## ratefunc("Server:%s " fmt,		\
-			server->hostname, ##__VA_ARGS__);	\
+		pr_debug_ ## ratefunc("\\\\%s " fmt,		\
+			sn, ##__VA_ARGS__);			\
 	}							\
 } while (0)
 
···
 			type, fmt, ##__VA_ARGS__);	\
 	else						\
 		cifs_server_dbg_func(ratelimited,	\
+			type, fmt, ##__VA_ARGS__);	\
+} while (0)
+
+#define cifs_tcon_dbg_func(ratefunc, type, fmt, ...)		\
+do {								\
+	const char *tn = "";					\
+	if (tcon && tcon->treeName)				\
+		tn = tcon->treeName;				\
+	if ((type) & FYI && cifsFYI & CIFS_INFO) {		\
+		pr_debug_ ## ratefunc("%s: %s "	fmt,		\
+			__FILE__, tn, ##__VA_ARGS__);		\
+	} else if ((type) & VFS) {				\
+		pr_err_ ## ratefunc("CIFS VFS: %s " fmt,	\
+			tn, ##__VA_ARGS__);			\
+	} else if ((type) & NOISY && (NOISY != 0)) {		\
+		pr_debug_ ## ratefunc("%s " fmt,		\
+			tn, ##__VA_ARGS__);			\
+	}							\
+} while (0)
+
+#define cifs_tcon_dbg(type, fmt, ...)			\
+do {							\
+	if ((type) & ONCE)				\
+		cifs_tcon_dbg_func(once,		\
+			type, fmt, ##__VA_ARGS__);	\
+	else						\
+		cifs_tcon_dbg_func(ratelimited,	\
 			type, fmt, ##__VA_ARGS__);	\
 } while (0)
 
···
 #define cifs_server_dbg(type, fmt, ...)					\
 do {									\
 	if (0)								\
-		pr_debug("Server:%s " fmt,				\
+		pr_debug("\\\\%s " fmt,					\
 			 server->hostname, ##__VA_ARGS__);		\
+} while (0)
+
+#define cifs_tcon_dbg(type, fmt, ...)					\
+do {									\
+	if (0)								\
+		pr_debug("%s " fmt, tcon->treeName, ##__VA_ARGS__);	\
 } while (0)
 
 #define cifs_info(fmt, ...)						\

fs/cifs/smb2ops.c

···
 		/* change_conf hasn't been executed */
 		break;
 	case 0:
-		cifs_dbg(VFS, "Possible client or server bug - zero credits\n");
+		cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n");
 		break;
 	case 1:
-		cifs_dbg(VFS, "disabling echoes and oplocks\n");
+		cifs_server_dbg(VFS, "disabling echoes and oplocks\n");
 		break;
 	case 2:
 		cifs_dbg(FYI, "disabling oplocks\n");
···
 
 	if (server->reconnect_instance != credits->instance) {
 		spin_unlock(&server->req_lock);
-		cifs_dbg(VFS, "trying to return %d credits to old session\n",
+		cifs_server_dbg(VFS, "trying to return %d credits to old session\n",
 			 credits->value - new_val);
 		return -EAGAIN;
 	}
···
 	__u64 wire_mid = le64_to_cpu(shdr->MessageId);
 
 	if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
-		cifs_dbg(VFS, "Encrypted frame parsing not supported yet\n");
+		cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 		return NULL;
 	}
 
···
 #ifdef CONFIG_CIFS_DEBUG2
 	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 
-	cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
+	cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n",
 		 shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId,
 		 shdr->ProcessId);
-	cifs_dbg(VFS, "smb buf %p len %u\n", buf,
+	cifs_server_dbg(VFS, "smb buf %p len %u\n", buf,
 		 server->ops->calc_smb_size(buf, server));
 #endif
 }
···
 			 "server does not support query network interfaces\n");
 		goto out;
 	} else if (rc != 0) {
-		cifs_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
+		cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc);
 		goto out;
 	}
 
···
 			(char **)&res_key, &ret_data_len);
 
 	if (rc) {
-		cifs_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
+		cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc);
 		goto req_res_key_exit;
 	}
 	if (ret_data_len < sizeof(struct resume_key_req)) {
-		cifs_dbg(VFS, "Invalid refcopy resume key length\n");
+		cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n");
 		rc = -EINVAL;
 		goto req_res_key_exit;
 	}
···
 				  qi.input_buffer_length,
 				  qi.output_buffer_length, buffer);
 	} else { /* unknown flags */
-		cifs_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
+		cifs_tcon_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
 		rc = -EINVAL;
 	}
 
···
 		if (rc == 0) {
 			if (ret_data_len !=
 					sizeof(struct copychunk_ioctl_rsp)) {
-				cifs_dbg(VFS, "invalid cchunk response size\n");
+				cifs_tcon_dbg(VFS, "invalid cchunk response size\n");
 				rc = -EIO;
 				goto cchunk_out;
 			}
···
 			 */
 			if (le32_to_cpu(retbuf->TotalBytesWritten) >
 			    le32_to_cpu(pcchunk->Length)) {
-				cifs_dbg(VFS, "invalid copy chunk response\n");
+				cifs_tcon_dbg(VFS, "invalid copy chunk response\n");
 				rc = -EIO;
 				goto cchunk_out;
 			}
 			if (le32_to_cpu(retbuf->ChunksWritten) != 1) {
-				cifs_dbg(VFS, "invalid num chunks written\n");
+				cifs_tcon_dbg(VFS, "invalid num chunks written\n");
 				rc = -EIO;
 				goto cchunk_out;
 			}
···
 
 	if (rc) {
 		if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
-			cifs_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
+			cifs_tcon_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
 		goto out;
 	}
 
···
 				 nls_codepage, remap, search_name,
 				 true /* is_unicode */);
 	if (rc) {
-		cifs_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
+		cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
 		goto out;
 	}
 
···
 
 		if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
 		    rsp_iov[1].iov_len) {
-			cifs_dbg(VFS, "srv returned invalid ioctl len: %d\n",
+			cifs_tcon_dbg(VFS, "srv returned invalid ioctl len: %d\n",
 				 plen);
 			rc = -EIO;
 			goto querty_exit;
···
 
 	rc = smb2_get_enc_key(server, tr_hdr->SessionId, enc, key);
 	if (rc) {
-		cifs_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
+		cifs_server_dbg(VFS, "%s: Could not get %scryption key\n", __func__,
 			 enc ? "en" : "de");
 		return 0;
 	}
 
 	rc = smb3_crypto_aead_allocate(server);
 	if (rc) {
-		cifs_dbg(VFS, "%s: crypto alloc failed\n", __func__);
+		cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__);
 		return rc;
 	}
 
···
 						server->secmech.ccmaesdecrypt;
 	rc = crypto_aead_setkey(tfm, key, SMB3_SIGN_KEY_SIZE);
 	if (rc) {
-		cifs_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
+		cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc);
 		return rc;
 	}
 
 	rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE);
 	if (rc) {
-		cifs_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
+		cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc);
 		return rc;
 	}
 
 	req = aead_request_alloc(tfm, GFP_KERNEL);
 	if (!req) {
-		cifs_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
+		cifs_server_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
 		return -ENOMEM;
 	}
 
···
 
 	sg = init_sg(num_rqst, rqst, sign);
 	if (!sg) {
-		cifs_dbg(VFS, "%s: Failed to init sg\n", __func__);
+		cifs_server_dbg(VFS, "%s: Failed to init sg\n", __func__);
 		rc = -ENOMEM;
 		goto free_req;
 	}
···
 	iv_len = crypto_aead_ivsize(tfm);
 	iv = kzalloc(iv_len, GFP_KERNEL);
 	if (!iv) {
-		cifs_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
+		cifs_server_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
 		rc = -ENOMEM;
 		goto free_sg;
 	}
···
 	bool use_rdma_mr = false;
 
 	if (shdr->Command != SMB2_READ) {
-		cifs_dbg(VFS, "only big read responses are supported\n");
+		cifs_server_dbg(VFS, "only big read responses are supported\n");
 		return -ENOTSUPP;
 	}
 
···
 	}
 
 	if (*num_mids >= MAX_COMPOUND) {
-		cifs_dbg(VFS, "too many PDUs in compound\n");
+		cifs_server_dbg(VFS, "too many PDUs in compound\n");
 		return -1;
 	}
 	bufs[*num_mids] = buf;
···
 
 	if (pdu_length < sizeof(struct smb2_transform_hdr) +
 						sizeof(struct smb2_sync_hdr)) {
-		cifs_dbg(VFS, "Transform message is too small (%u)\n",
+		cifs_server_dbg(VFS, "Transform message is too small (%u)\n",
 			 pdu_length);
 		cifs_reconnect(server);
 		wake_up(&server->response_q);
···
 	}
 
 	if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) {
-		cifs_dbg(VFS, "Transform message is broken\n");
+		cifs_server_dbg(VFS, "Transform message is broken\n");
 		cifs_reconnect(server);
 		wake_up(&server->response_q);
 		return -ECONNABORTED;

fs/cifs/smb2pdu.c

···
 	}
 
 	if (tcon->ses->session_flags & SMB2_SESSION_FLAG_IS_NULL)
-		cifs_server_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
+		cifs_tcon_dbg(VFS, "Unexpected null user (anonymous) auth flag sent by server\n");
 
 	pneg_inbuf = kmalloc(sizeof(*pneg_inbuf), GFP_NOFS);
 	if (!pneg_inbuf)
···
 		 * Old Windows versions or Netapp SMB server can return
 		 * not supported error. Client should accept it.
 		 */
-		cifs_server_dbg(VFS, "Server does not support validate negotiate\n");
+		cifs_tcon_dbg(VFS, "Server does not support validate negotiate\n");
 		rc = 0;
 		goto out_free_inbuf;
 	} else if (rc != 0) {
-		cifs_server_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
+		cifs_tcon_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
 		rc = -EIO;
 		goto out_free_inbuf;
 	}
 
 	rc = -EIO;
 	if (rsplen != sizeof(*pneg_rsp)) {
-		cifs_server_dbg(VFS, "invalid protocol negotiate response size: %d\n",
+		cifs_tcon_dbg(VFS, "invalid protocol negotiate response size: %d\n",
 			 rsplen);
 
 		/* relax check since Mac returns max bufsize allowed on ioctl */
···
 	goto out_free_rsp;
 
 vneg_out:
-	cifs_server_dbg(VFS, "protocol revalidation - security settings mismatch\n");
+	cifs_tcon_dbg(VFS, "protocol revalidation - security settings mismatch\n");
 out_free_rsp:
 	kfree(pneg_rsp);
 out_free_inbuf:
···
 
 	if ((rsp->Capabilities & SMB2_SHARE_CAP_DFS) &&
 	    ((tcon->share_flags & SHI1005_FLAGS_DFS) == 0))
-		cifs_server_dbg(VFS, "DFS capability contradicts DFS flag\n");
+		cifs_tcon_dbg(VFS, "DFS capability contradicts DFS flag\n");
 
 	if (tcon->seal &&
 	    !(server->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION))
-		cifs_server_dbg(VFS, "Encryption is requested but not supported\n");
+		cifs_tcon_dbg(VFS, "Encryption is requested but not supported\n");
 
 	init_copy_chunk_defaults(tcon);
 	if (server->ops->validate_negotiate)
···
 
 tcon_error_exit:
 	if (rsp && rsp->sync_hdr.Status == STATUS_BAD_NETWORK_NAME) {
-		cifs_server_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
+		cifs_tcon_dbg(VFS, "BAD_NETWORK_NAME: %s\n", tree);
 	}
 	goto tcon_exit;
 }
···
 	if (*plen == 0)
 		goto ioctl_exit; /* server returned no data */
 	else if (*plen > rsp_iov.iov_len || *plen > 0xFF00) {
-		cifs_server_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
+		cifs_tcon_dbg(VFS, "srv returned invalid ioctl length: %d\n", *plen);
 		*plen = 0;
 		rc = -EIO;
 		goto ioctl_exit;
 	}
 
 	if (rsp_iov.iov_len - *plen < le32_to_cpu(rsp->OutputOffset)) {
-		cifs_server_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
+		cifs_tcon_dbg(VFS, "Malformed ioctl resp: len %d offset %d\n", *plen,
 			le32_to_cpu(rsp->OutputOffset));
 		*plen = 0;
 		rc = -EIO;
···
 		if (!*data) {
 			*data = kmalloc(*dlen, GFP_KERNEL);
 			if (!*data) {
-				cifs_server_dbg(VFS,
+				cifs_tcon_dbg(VFS,
 					"Error %d allocating memory for acl\n",
 					rc);
 				*dlen = 0;
···
 
 			rc = smb2_verify_signature(&rqst, server);
 			if (rc)
-				cifs_server_dbg(VFS, "SMB signature verification returned error = %d\n",
+				cifs_tcon_dbg(VFS, "SMB signature verification returned error = %d\n",
 					 rc);
 		}
 		/* FIXME: should this be counted toward the initiating task? */
···
 		info_buf_size = sizeof(SEARCH_ID_FULL_DIR_INFO) - 1;
 		break;
 	default:
-		cifs_server_dbg(VFS, "info level %u isn't supported\n",
+		cifs_tcon_dbg(VFS, "info level %u isn't supported\n",
 			 srch_inf->info_level);
 		rc = -EINVAL;
 		goto qdir_exit;
···
 	else if (resp_buftype == CIFS_SMALL_BUFFER)
 		srch_inf->smallBuf = true;
 	else
-		cifs_server_dbg(VFS, "illegal search buffer type\n");
+		cifs_tcon_dbg(VFS, "illegal search buffer type\n");
 
 	trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
 			tcon->ses->Suid, index, srch_inf->entries_in_buffer);

fs/cifs/transport.c

···
 	   use ses->maxReq */
 
 	if (len > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) {
-		cifs_server_dbg(VFS, "Illegal length, greater than maximum frame, %d\n",
+		cifs_tcon_dbg(VFS, "Illegal length, greater than maximum frame, %d\n",
 			 len);
 		return -EIO;
 	}
···
 	/* rcvd frame is ok */
 	if (out_buf == NULL || midQ->mid_state != MID_RESPONSE_RECEIVED) {
 		rc = -EIO;
-		cifs_server_dbg(VFS, "Bad MID state?\n");
+		cifs_tcon_dbg(VFS, "Bad MID state?\n");
 		goto out;
 	}