305 static int nfs_validate_transport_protocol(struct fs_context *fc,  in nfs_validate_transport_protocol()  argument
321 	return nfs_invalf(fc, "NFS: Unsupported transport protocol udp");  in nfs_validate_transport_protocol()
347 static int nfs_auth_info_add(struct fs_context *fc,  in nfs_auth_info_add()  argument
361 		return nfs_invalf(fc, "NFS: too many sec= flavors");  in nfs_auth_info_add()
370 static int nfs_parse_security_flavors(struct fs_context *fc,  in nfs_parse_security_flavors()  argument
373 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_security_flavors()
418 			return nfs_invalf(fc, "NFS: sec=%s option not recognized", p);  in nfs_parse_security_flavors()
421 		ret = nfs_auth_info_add(fc, &ctx->auth_info, pseudoflavor);  in nfs_parse_security_flavors()
429 static int nfs_parse_version_string(struct fs_context *fc,  in nfs_parse_version_string()  argument
432 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_version_string()
463 		return nfs_invalf(fc, "NFS: Unsupported NFS version");  in nfs_parse_version_string()
471 static int nfs_fs_context_parse_param(struct fs_context *fc,  in nfs_fs_context_parse_param()  argument
475 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_fs_context_parse_param()
482 	opt = fs_parse(fc, nfs_fs_parameters, param, &result);  in nfs_fs_context_parse_param()
486 	if (fc->security)  in nfs_fs_context_parse_param()
491 		if (fc->source)  in nfs_fs_context_parse_param()
492 			return nfs_invalf(fc, "NFS: Multiple sources not supported");  in nfs_fs_context_parse_param()
493 		fc->source = param->string;  in nfs_fs_context_parse_param()
672 		ret = nfs_parse_version_string(fc, param->key + 1);  in nfs_fs_context_parse_param()
677 		ret = nfs_parse_version_string(fc, param->string);  in nfs_fs_context_parse_param()
682 		ret = nfs_parse_security_flavors(fc, param);  in nfs_fs_context_parse_param()
745 		len = rpc_pton(fc->net_ns, param->string, param->size,  in nfs_fs_context_parse_param()
763 		len = rpc_pton(fc->net_ns, param->string, param->size,  in nfs_fs_context_parse_param()
847 	return nfs_invalf(fc, "NFS: Bad mount option value specified");  in nfs_fs_context_parse_param()
849 	return nfs_invalf(fc, "NFS: Bad IP address specified");  in nfs_fs_context_parse_param()
851 	return nfs_invalf(fc, "NFS: Value for '%s' out of range", param->key);  in nfs_fs_context_parse_param()
853 	return nfs_invalf(fc, "NFS: Unrecognized transport protocol");  in nfs_fs_context_parse_param()
865 static int nfs_parse_source(struct fs_context *fc,  in nfs_parse_source()  argument
868 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_parse_source()
869 	const char *dev_name = fc->source;  in nfs_parse_source()
920 	return nfs_invalf(fc, "NFS: device name not in host:path format");  in nfs_parse_source()
922 	nfs_errorf(fc, "NFS: not enough memory to parse device name");  in nfs_parse_source()
925 	nfs_errorf(fc, "NFS: server hostname too long");  in nfs_parse_source()
928 	nfs_errorf(fc, "NFS: export pathname too long");  in nfs_parse_source()
932 static inline bool is_remount_fc(struct fs_context *fc)  in is_remount_fc()  argument
934 	return fc->root != NULL;  in is_remount_fc()
953 static int nfs23_parse_monolithic(struct fs_context *fc,  in nfs23_parse_monolithic()  argument
956 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs23_parse_monolithic()
1072 			ret = vfs_parse_fs_string(fc, "context",  in nfs23_parse_monolithic()
1086 	ret = nfs_validate_transport_protocol(fc, ctx);  in nfs23_parse_monolithic()
1094 	return generic_parse_monolithic(fc, data);  in nfs23_parse_monolithic()
1097 	if (is_remount_fc(fc)) {  in nfs23_parse_monolithic()
1101 	return nfs_invalf(fc, "NFS: mount program didn't pass any mount data");  in nfs23_parse_monolithic()
1104 	return nfs_invalf(fc, "NFS: nfs_mount_data version does not support v3");  in nfs23_parse_monolithic()
1107 	return nfs_invalf(fc, "NFS: nfs_mount_data version supports only AUTH_SYS");  in nfs23_parse_monolithic()
1114 	return nfs_invalf(fc, "NFS: mount program didn't pass remote address");  in nfs23_parse_monolithic()
1117 	return nfs_invalf(fc, "NFS: invalid root filehandle");  in nfs23_parse_monolithic()
1120 	return nfs_invalf(fc, "NFS: invalid binary mount data");  in nfs23_parse_monolithic()
1186 static int nfs4_parse_monolithic(struct fs_context *fc,  in nfs4_parse_monolithic()  argument
1189 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs4_parse_monolithic()
1195 		if (is_remount_fc(fc))  in nfs4_parse_monolithic()
1197 		return nfs_invalf(fc,  in nfs4_parse_monolithic()
1204 		return generic_parse_monolithic(fc, data);  in nfs4_parse_monolithic()
1264 	ret = nfs_validate_transport_protocol(fc, ctx);  in nfs4_parse_monolithic()
1272 	return nfs_invalf(fc, "NFS4: Invalid number of RPC auth flavours %d",  in nfs4_parse_monolithic()
1276 	return nfs_invalf(fc, "NFS4: mount program didn't pass remote address");  in nfs4_parse_monolithic()
1283 static int nfs_fs_context_parse_monolithic(struct fs_context *fc,  in nfs_fs_context_parse_monolithic()  argument
1286 	if (fc->fs_type == &nfs_fs_type)  in nfs_fs_context_parse_monolithic()
1287 		return nfs23_parse_monolithic(fc, data);  in nfs_fs_context_parse_monolithic()
1290 	if (fc->fs_type == &nfs4_fs_type)  in nfs_fs_context_parse_monolithic()
1291 		return nfs4_parse_monolithic(fc, data);  in nfs_fs_context_parse_monolithic()
1294 	return nfs_invalf(fc, "NFS: Unsupported monolithic data version");  in nfs_fs_context_parse_monolithic()
1300 static int nfs_fs_context_validate(struct fs_context *fc)  in nfs_fs_context_validate()  argument
1302 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_fs_context_validate()
1310 	if (!fc->source)  in nfs_fs_context_validate()
1341 	ret = nfs_validate_transport_protocol(fc, ctx);  in nfs_fs_context_validate()
1367 	ret = nfs_parse_source(fc, max_namelen, max_pathlen);  in nfs_fs_context_validate()
1382 	if (fc->fs_type != ctx->nfs_mod->nfs_fs) {  in nfs_fs_context_validate()
1383 		module_put(fc->fs_type->owner);  in nfs_fs_context_validate()
1385 		fc->fs_type = ctx->nfs_mod->nfs_fs;  in nfs_fs_context_validate()
1390 	return nfs_invalf(fc, "NFS: Device name not specified");  in nfs_fs_context_validate()
1392 	nfs_errorf(fc, "NFS: NFSv4 is not compiled into kernel");  in nfs_fs_context_validate()
1395 	return nfs_invalf(fc, "NFS: mount program didn't pass remote address");  in nfs_fs_context_validate()
1397 	return nfs_invalf(fc, "NFS: Mount server address does not match mountproto= option");  in nfs_fs_context_validate()
1399 	return nfs_invalf(fc, "NFS: Server address does not match proto= option");  in nfs_fs_context_validate()
1401 	return nfs_invalf(fc, "NFS: Mount option vers=%u does not support minorversion=%u",  in nfs_fs_context_validate()
1404 	return nfs_invalf(fc, "NFS: 'Migration' not supported for this NFS version");  in nfs_fs_context_validate()
1406 	nfs_errorf(fc, "NFS: Version unavailable");  in nfs_fs_context_validate()
1413 static int nfs_get_tree(struct fs_context *fc)  in nfs_get_tree()  argument
1415 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_get_tree()
1416 	int err = nfs_fs_context_validate(fc);  in nfs_get_tree()
1421 		return ctx->nfs_mod->rpc_ops->try_get_tree(fc);  in nfs_get_tree()
1423 		return nfs_get_tree_common(fc);  in nfs_get_tree()
1432 static int nfs_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)  in nfs_fs_context_dup()  argument
1454 	fc->fs_private = ctx;  in nfs_fs_context_dup()
1458 static void nfs_fs_context_free(struct fs_context *fc)  in nfs_fs_context_free()  argument
1460 	struct nfs_fs_context *ctx = nfs_fc2context(fc);  in nfs_fs_context_free()
1492 static int nfs_init_fs_context(struct fs_context *fc)  in nfs_init_fs_context()  argument
1510 	if (fc->root) {  in nfs_init_fs_context()
1512 		struct nfs_server *nfss = fc->root->d_sb->s_fs_info;  in nfs_init_fs_context()
1533 		if (fc->net_ns != net) {  in nfs_init_fs_context()
1534 			put_net(fc->net_ns);  in nfs_init_fs_context()
1535 			fc->net_ns = get_net(net);  in nfs_init_fs_context()
1554 		fc->s_iflags		|= SB_I_STABLE_WRITES;  in nfs_init_fs_context()
1556 	fc->fs_private = ctx;  in nfs_init_fs_context()
1557 	fc->ops = &nfs_fs_context_ops;  in nfs_init_fs_context()