312 static int nfs_auth_info_add(struct fs_context *fc,  in nfs_auth_info_add()  argument
326 		return nfs_invalf(fc, "NFS: too many sec= flavors");  in nfs_auth_info_add()
335 static int nfs_parse_security_flavors(struct fs_context *fc,  in nfs_parse_security_flavors()  argument
338 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_security_flavors()
383 			return nfs_invalf(fc, "NFS: sec=%s option not recognized", p);  in nfs_parse_security_flavors()
386 		ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor);  in nfs_parse_security_flavors()
394 static int nfs_parse_version_string(struct fs_context *fc,  in nfs_parse_version_string()  argument
397 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_version_string()
428 		return nfs_invalf(fc, "NFS: Unsupported NFS version");  in nfs_parse_version_string()
436 static int nfs_fs_context_parse_param(struct fs_context *fc,  in nfs_fs_context_parse_param()  argument
440 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_fs_context_parse_param()
447 	opt = fs_parse(fc, nfs_fs_parameters, param, &result);  in nfs_fs_context_parse_param()
453 		if (fc->source)  in nfs_fs_context_parse_param()
454 			return nfs_invalf(fc, "NFS: Multiple sources not supported");  in nfs_fs_context_parse_param()
455 		fc->source = param->string;  in nfs_fs_context_parse_param()
635 		ret = nfs_parse_version_string(fc, param->key + 1);  in nfs_fs_context_parse_param()
640 		ret = nfs_parse_version_string(fc, param->string);  in nfs_fs_context_parse_param()
645 		ret = nfs_parse_security_flavors(fc, param);  in nfs_fs_context_parse_param()
677 			return nfs_invalf(fc, "NFS: Unrecognized transport protocol");  in nfs_fs_context_parse_param()
700 			return nfs_invalf(fc, "NFS: Unrecognized transport protocol");  in nfs_fs_context_parse_param()
706 		len = rpc_pton(fc->net_ns, param->string, param->size,  in nfs_fs_context_parse_param()
724 		len = rpc_pton(fc->net_ns, param->string, param->size,  in nfs_fs_context_parse_param()
785 	return nfs_invalf(fc, "NFS: Bad mount option value specified");  in nfs_fs_context_parse_param()
787 	return nfs_invalf(fc, "NFS: Bad IP address specified");  in nfs_fs_context_parse_param()
789 	return nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key);  in nfs_fs_context_parse_param()
801 static int nfs_parse_source(struct fs_context *fc,  in nfs_parse_source()  argument
804 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_source()
805 	const char *dev_name = fc->source;  in nfs_parse_source()
856 	return nfs_invalf(fc, "NFS: device name not in host:path format");  in nfs_parse_source()
858 	nfs_errorf(fc, "NFS: not enough memory to parse device name");  in nfs_parse_source()
861 	nfs_errorf(fc, "NFS: server hostname too long");  in nfs_parse_source()
864 	nfs_errorf(fc, "NFS: export pathname too long");  in nfs_parse_source()
868 static inline bool is_remount_fc(struct fs_context *fc)  in is_remount_fc()  argument
870 	return fc->root != NULL;  in is_remount_fc()
889 static int nfs23_parse_monolithic(struct fs_context *fc,  in nfs23_parse_monolithic()  argument
892 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs23_parse_monolithic()
998 			ret = vfs_parse_fs_string(fc, "context",  in nfs23_parse_monolithic()
1016 	return generic_parse_monolithic(fc, data);  in nfs23_parse_monolithic()
1019 	if (is_remount_fc(fc)) {  in nfs23_parse_monolithic()
1023 	return nfs_invalf(fc, "NFS: mount program didn't pass any mount data");  in nfs23_parse_monolithic()
1026 	return nfs_invalf(fc, "NFS: nfs_mount_data version does not support v3");  in nfs23_parse_monolithic()
1029 	return nfs_invalf(fc, "NFS: nfs_mount_data version supports only AUTH_SYS");  in nfs23_parse_monolithic()
1036 	return nfs_invalf(fc, "NFS: mount program didn't pass remote address");  in nfs23_parse_monolithic()
1039 	return nfs_invalf(fc, "NFS: invalid root filehandle");  in nfs23_parse_monolithic()
1105 static int nfs4_parse_monolithic(struct fs_context *fc,  in nfs4_parse_monolithic()  argument
1108 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs4_parse_monolithic()
1113 		if (is_remount_fc(fc))  in nfs4_parse_monolithic()
1115 		return nfs_invalf(fc,  in nfs4_parse_monolithic()
1122 		return generic_parse_monolithic(fc, data);  in nfs4_parse_monolithic()
1190 	return nfs_invalf(fc, "NFS4: Invalid number of RPC auth flavours %d",  in nfs4_parse_monolithic()
1194 	return nfs_invalf(fc, "NFS4: mount program didn't pass remote address");  in nfs4_parse_monolithic()
1197 	return nfs_invalf(fc, "NFS: Unsupported transport protocol udp");  in nfs4_parse_monolithic()
1204 static int nfs_fs_context_parse_monolithic(struct fs_context *fc,  in nfs_fs_context_parse_monolithic()  argument
1207 	if (fc->fs_type == &nfs_fs_type)  in nfs_fs_context_parse_monolithic()
1208 		return nfs23_parse_monolithic(fc, data);  in nfs_fs_context_parse_monolithic()
1211 	if (fc->fs_type == &nfs4_fs_type)  in nfs_fs_context_parse_monolithic()
1212 		return nfs4_parse_monolithic(fc, data);  in nfs_fs_context_parse_monolithic()
1215 	return nfs_invalf(fc, "NFS: Unsupported monolithic data version");  in nfs_fs_context_parse_monolithic()
1221 static int nfs_fs_context_validate(struct fs_context *fc)  in nfs_fs_context_validate()  argument
1223 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_fs_context_validate()
1231 	if (!fc->source)  in nfs_fs_context_validate()
1291 	ret = nfs_parse_source(fc, max_namelen, max_pathlen);  in nfs_fs_context_validate()
1306 	if (fc->fs_type != ctx->nfs_mod->nfs_fs) {  in nfs_fs_context_validate()
1307 		module_put(fc->fs_type->owner);  in nfs_fs_context_validate()
1309 		fc->fs_type = ctx->nfs_mod->nfs_fs;  in nfs_fs_context_validate()
1314 	return nfs_invalf(fc, "NFS: Device name not specified");  in nfs_fs_context_validate()
1316 	nfs_errorf(fc, "NFS: NFSv4 is not compiled into kernel");  in nfs_fs_context_validate()
1319 	return nfs_invalf(fc, "NFS: Unsupported transport protocol udp");  in nfs_fs_context_validate()
1321 	return nfs_invalf(fc, "NFS: mount program didn't pass remote address");  in nfs_fs_context_validate()
1323 	return nfs_invalf(fc, "NFS: Mount server address does not match mountproto= option");  in nfs_fs_context_validate()
1325 	return nfs_invalf(fc, "NFS: Server address does not match proto= option");  in nfs_fs_context_validate()
1327 	return nfs_invalf(fc, "NFS: Mount option vers=%u does not support minorversion=%u",  in nfs_fs_context_validate()
1330 	return nfs_invalf(fc, "NFS: 'Migration' not supported for this NFS version");  in nfs_fs_context_validate()
1332 	nfs_errorf(fc, "NFS: Version unavailable");  in nfs_fs_context_validate()
1339 static int nfs_get_tree(struct fs_context *fc)  in nfs_get_tree()  argument
1341 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_get_tree()
1342 	int err = nfs_fs_context_validate(fc);  in nfs_get_tree()
1347 		return ctx->nfs_mod->rpc_ops->try_get_tree(fc);  in nfs_get_tree()
1349 		return nfs_get_tree_common(fc);  in nfs_get_tree()
1358 static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)  in nfs_fs_context_dup()  argument
1380 	fc->fs_private = ctx;  in nfs_fs_context_dup()
1384 static void nfs_fs_context_free(struct fs_context *fc)  in nfs_fs_context_free()  argument
1386 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_fs_context_free()
1418 static int nfs_init_fs_context(struct fs_context *fc)  in nfs_init_fs_context()  argument
1436 	if (fc->root) {  in nfs_init_fs_context()
1438 		struct nfs_server *nfss = fc->root->d_sb->s_fs_info;  in nfs_init_fs_context()
1459 		if (fc->net_ns != net) {  in nfs_init_fs_context()
1460 			put_net(fc->net_ns);  in nfs_init_fs_context()
1461 			fc->net_ns = get_net(net);  in nfs_init_fs_context()
1480 	fc->fs_private = ctx;  in nfs_init_fs_context()
1481 	fc->ops = &nfs_fs_context_ops;  in nfs_init_fs_context()