330 static int nfs_validate_transport_protocol(struct fs_context *fc,  in nfs_validate_transport_protocol()  argument
356 	return nfs_invalf(fc, "NFS: Unsupported transport protocol udp");  in nfs_validate_transport_protocol()
358 	return nfs_invalf(fc, "NFS: Transport does not support xprtsec");  in nfs_validate_transport_protocol()
384 static int nfs_auth_info_add(struct fs_context *fc,  in nfs_auth_info_add()  argument
398 		return nfs_invalf(fc, "NFS: too many sec= flavors");  in nfs_auth_info_add()
407 static int nfs_parse_security_flavors(struct fs_context *fc,  in nfs_parse_security_flavors()  argument
410 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_security_flavors()
455 			return nfs_invalf(fc, "NFS: sec=%s option not recognized", p);  in nfs_parse_security_flavors()
458 		ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor);  in nfs_parse_security_flavors()
466 static int nfs_parse_xprtsec_policy(struct fs_context *fc,  in nfs_parse_xprtsec_policy()  argument
469 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_xprtsec_policy()
484 		return nfs_invalf(fc, "NFS: Unrecognized transport security policy");  in nfs_parse_xprtsec_policy()
489 static int nfs_parse_version_string(struct fs_context *fc,  in nfs_parse_version_string()  argument
492 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_version_string()
523 		return nfs_invalf(fc, "NFS: Unsupported NFS version");  in nfs_parse_version_string()
531 static int nfs_fs_context_parse_param(struct fs_context *fc,  in nfs_fs_context_parse_param()  argument
535 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_fs_context_parse_param()
542 	opt = fs_parse(fc, nfs_fs_parameters, param, &result);  in nfs_fs_context_parse_param()
546 	if (fc->security)  in nfs_fs_context_parse_param()
551 		if (fc->source)  in nfs_fs_context_parse_param()
552 			return nfs_invalf(fc, "NFS: Multiple sources not supported");  in nfs_fs_context_parse_param()
553 		fc->source = param->string;  in nfs_fs_context_parse_param()
747 		ret = nfs_parse_version_string(fc, param->key + 1);  in nfs_fs_context_parse_param()
755 		ret = nfs_parse_version_string(fc, param->string);  in nfs_fs_context_parse_param()
760 		ret = nfs_parse_security_flavors(fc, param);  in nfs_fs_context_parse_param()
765 		ret = nfs_parse_xprtsec_policy(fc, param);  in nfs_fs_context_parse_param()
835 		len = rpc_pton(fc->net_ns, param->string, param->size,  in nfs_fs_context_parse_param()
856 		len = rpc_pton(fc->net_ns, param->string, param->size,  in nfs_fs_context_parse_param()
944 	return nfs_invalf(fc, "NFS: Bad mount option value specified");  in nfs_fs_context_parse_param()
946 	return nfs_invalf(fc, "NFS: Bad IP address specified");  in nfs_fs_context_parse_param()
948 	return nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key);  in nfs_fs_context_parse_param()
950 	return nfs_invalf(fc, "NFS: Unrecognized transport protocol");  in nfs_fs_context_parse_param()
954  * Split fc->source into "hostname:export_path".
962 static int nfs_parse_source(struct fs_context *fc,  in nfs_parse_source()  argument
965 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_source()
966 	const char *dev_name = fc->source;  in nfs_parse_source()
1015 	return nfs_invalf(fc, "NFS: device name not in host:path format");  in nfs_parse_source()
1017 	nfs_errorf(fc, "NFS: not enough memory to parse device name");  in nfs_parse_source()
1020 	nfs_errorf(fc, "NFS: server hostname too long");  in nfs_parse_source()
1023 	nfs_errorf(fc, "NFS: export pathname too long");  in nfs_parse_source()
1027 static inline bool is_remount_fc(struct fs_context *fc)  in is_remount_fc()  argument
1029 	return fc->root != NULL;  in is_remount_fc()
1048 static int nfs23_parse_monolithic(struct fs_context *fc,  in nfs23_parse_monolithic()  argument
1051 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs23_parse_monolithic()
1125 		if (!is_remount_fc(fc)) {  in nfs23_parse_monolithic()
1170 			ret = vfs_parse_fs_string(fc, "context",  in nfs23_parse_monolithic()
1184 	ret = nfs_validate_transport_protocol(fc, ctx);  in nfs23_parse_monolithic()
1192 	return generic_parse_monolithic(fc, data);  in nfs23_parse_monolithic()
1195 	if (is_remount_fc(fc)) {  in nfs23_parse_monolithic()
1199 	return nfs_invalf(fc, "NFS: mount program didn't pass any mount data");  in nfs23_parse_monolithic()
1202 	return nfs_invalf(fc, "NFS: nfs_mount_data version does not support v3");  in nfs23_parse_monolithic()
1205 	return nfs_invalf(fc, "NFS: nfs_mount_data version supports only AUTH_SYS");  in nfs23_parse_monolithic()
1211 	return nfs_invalf(fc, "NFS: mount program didn't pass remote address");  in nfs23_parse_monolithic()
1214 	return nfs_invalf(fc, "NFS: invalid root filehandle");  in nfs23_parse_monolithic()
1217 	return nfs_invalf(fc, "NFS: invalid binary mount data");  in nfs23_parse_monolithic()
1283 static int nfs4_parse_monolithic(struct fs_context *fc,  in nfs4_parse_monolithic()  argument
1286 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs4_parse_monolithic()
1292 		if (is_remount_fc(fc))  in nfs4_parse_monolithic()
1294 		return nfs_invalf(fc,  in nfs4_parse_monolithic()
1301 		return generic_parse_monolithic(fc, data);  in nfs4_parse_monolithic()
1361 	ret = nfs_validate_transport_protocol(fc, ctx);  in nfs4_parse_monolithic()
1369 	return nfs_invalf(fc, "NFS4: Invalid number of RPC auth flavours %d",  in nfs4_parse_monolithic()
1373 	return nfs_invalf(fc, "NFS4: mount program didn't pass remote address");  in nfs4_parse_monolithic()
1380 static int nfs_fs_context_parse_monolithic(struct fs_context *fc,  in nfs_fs_context_parse_monolithic()  argument
1383 	if (fc->fs_type == &nfs_fs_type)  in nfs_fs_context_parse_monolithic()
1384 		return nfs23_parse_monolithic(fc, data);  in nfs_fs_context_parse_monolithic()
1387 	if (fc->fs_type == &nfs4_fs_type)  in nfs_fs_context_parse_monolithic()
1388 		return nfs4_parse_monolithic(fc, data);  in nfs_fs_context_parse_monolithic()
1391 	return nfs_invalf(fc, "NFS: Unsupported monolithic data version");  in nfs_fs_context_parse_monolithic()
1397 static int nfs_fs_context_validate(struct fs_context *fc)  in nfs_fs_context_validate()  argument
1399 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_fs_context_validate()
1407 	if (!fc->source)  in nfs_fs_context_validate()
1438 	ret = nfs_validate_transport_protocol(fc, ctx);  in nfs_fs_context_validate()
1464 	ret = nfs_parse_source(fc, max_namelen, max_pathlen);  in nfs_fs_context_validate()
1479 	if (fc->fs_type != ctx->nfs_mod->nfs_fs) {  in nfs_fs_context_validate()
1480 		module_put(fc->fs_type->owner);  in nfs_fs_context_validate()
1482 		fc->fs_type = ctx->nfs_mod->nfs_fs;  in nfs_fs_context_validate()
1487 	return nfs_invalf(fc, "NFS: Device name not specified");  in nfs_fs_context_validate()
1489 	nfs_errorf(fc, "NFS: NFSv4 is not compiled into kernel");  in nfs_fs_context_validate()
1492 	return nfs_invalf(fc, "NFS: mount program didn't pass remote address");  in nfs_fs_context_validate()
1494 	return nfs_invalf(fc, "NFS: Mount server address does not match mountproto= option");  in nfs_fs_context_validate()
1496 	return nfs_invalf(fc, "NFS: Server address does not match proto= option");  in nfs_fs_context_validate()
1498 	return nfs_invalf(fc, "NFS: Mount option vers=%u does not support minorversion=%u",  in nfs_fs_context_validate()
1501 	return nfs_invalf(fc, "NFS: 'Migration' not supported for this NFS version");  in nfs_fs_context_validate()
1503 	nfs_errorf(fc, "NFS: Version unavailable");  in nfs_fs_context_validate()
1510 static int nfs_get_tree(struct fs_context *fc)  in nfs_get_tree()  argument
1512 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_get_tree()
1513 	int err = nfs_fs_context_validate(fc);  in nfs_get_tree()
1518 		return ctx->nfs_mod->rpc_ops->try_get_tree(fc);  in nfs_get_tree()
1520 		return nfs_get_tree_common(fc);  in nfs_get_tree()
1529 static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)  in nfs_fs_context_dup()  argument
1551 	fc->fs_private = ctx;  in nfs_fs_context_dup()
1555 static void nfs_fs_context_free(struct fs_context *fc)  in nfs_fs_context_free()  argument
1557 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_fs_context_free()
1589 static int nfs_init_fs_context(struct fs_context *fc)  in nfs_init_fs_context()  argument
1607 	if (fc->root) {  in nfs_init_fs_context()
1609 		struct nfs_server *nfss = fc->root->d_sb->s_fs_info;  in nfs_init_fs_context()
1630 		if (fc->net_ns != net) {  in nfs_init_fs_context()
1631 			put_net(fc->net_ns);  in nfs_init_fs_context()
1632 			fc->net_ns = get_net(net);  in nfs_init_fs_context()
1654 		fc->s_iflags		|= SB_I_STABLE_WRITES;  in nfs_init_fs_context()
1656 	fc->fs_private = ctx;  in nfs_init_fs_context()
1657 	fc->ops = &nfs_fs_context_ops;  in nfs_init_fs_context()