186 static int ovl_parse_monolithic(struct fs_context *fc, void *data)  in ovl_parse_monolithic()  argument
188 	return vfs_parse_monolithic_sep(fc, data, ovl_next_opt);  in ovl_parse_monolithic()
276 static int ovl_mount_dir_check(struct fs_context *fc, const struct path *path,  in ovl_mount_dir_check()  argument
280 	struct ovl_fs_context *ctx = fc->fs_private;  in ovl_mount_dir_check()
281 	struct ovl_fs *ofs = fc->s_fs_info;  in ovl_mount_dir_check()
284 		return invalfc(fc, "%s is not a directory", name);  in ovl_mount_dir_check()
296 		return invalfc(fc, "case-%ssensitive directory on %s is inconsistent",  in ovl_mount_dir_check()
301 		return invalfc(fc, "filesystem on %s not supported", name);  in ovl_mount_dir_check()
310 			return invalfc(fc, "filesystem on %s not supported as upperdir", name);  in ovl_mount_dir_check()
312 			return invalfc(fc, "filesystem on %s is read-only", name);  in ovl_mount_dir_check()
315 			return invalfc(fc, "lowerdir+ and datadir+ cannot follow lowerdir");  in ovl_mount_dir_check()
317 			return invalfc(fc, "regular lower layers cannot follow data layers");  in ovl_mount_dir_check()
319 			return invalfc(fc, "too many lower directories, limit is %d",  in ovl_mount_dir_check()
325 static int ovl_ctx_realloc_lower(struct fs_context *fc)  in ovl_ctx_realloc_lower()  argument
327 	struct ovl_fs_context *ctx = fc->fs_private;  in ovl_ctx_realloc_lower()
345 static void ovl_add_layer(struct fs_context *fc, enum ovl_opt layer,  in ovl_add_layer()  argument
348 	struct ovl_fs *ofs = fc->s_fs_info;  in ovl_add_layer()
350 	struct ovl_fs_context *ctx = fc->fs_private;  in ovl_add_layer()
411 static int ovl_do_parse_layer(struct fs_context *fc, const char *layer_name,  in ovl_do_parse_layer()  argument
422 	err = ovl_mount_dir_check(fc, layer_path, layer, name, upper);  in ovl_do_parse_layer()
427 		err = ovl_ctx_realloc_lower(fc);  in ovl_do_parse_layer()
433 	ovl_add_layer(fc, layer, layer_path, &name);  in ovl_do_parse_layer()
437 static int ovl_parse_layer(struct fs_context *fc, struct fs_parameter *param,  in ovl_parse_layer()  argument
448 		err = ovl_do_parse_layer(fc, param->string, &layer_path, layer);  in ovl_parse_layer()
465 		err = ovl_do_parse_layer(fc, layer_name, &layer_path, layer);  in ovl_parse_layer()
501 static int ovl_parse_param_lowerdir(const char *name, struct fs_context *fc)  in ovl_parse_param_lowerdir()  argument
504 	struct ovl_fs_context *ctx = fc->fs_private;  in ovl_parse_param_lowerdir()
552 		err = ovl_do_parse_layer(fc, iter, &path, Opt_lowerdir);  in ovl_parse_param_lowerdir()
593 static int ovl_parse_param(struct fs_context *fc, struct fs_parameter *param)  in ovl_parse_param()  argument
597 	struct ovl_fs *ofs = fc->s_fs_info;  in ovl_parse_param()
599 	struct ovl_fs_context *ctx = fc->fs_private;  in ovl_parse_param()
602 	if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {  in ovl_parse_param()
608 		if (fc->oldapi)  in ovl_parse_param()
618 		return invalfc(fc, "No changes allowed in reconfigure");  in ovl_parse_param()
621 	opt = fs_parse(fc, ovl_parameter_spec, param, &result);  in ovl_parse_param()
627 		err = ovl_parse_param_lowerdir(param->string, fc);  in ovl_parse_param()
633 		err = ovl_parse_layer(fc, param, opt);  in ovl_parse_param()
683 		if (!current_in_userns(fc->user_ns)) {  in ovl_parse_param()
706 static int ovl_get_tree(struct fs_context *fc)  in ovl_get_tree()  argument
708 	return get_tree_nodev(fc, ovl_fill_super);  in ovl_get_tree()
720 static void ovl_free(struct fs_context *fc)  in ovl_free()  argument
722 	struct ovl_fs *ofs = fc->s_fs_info;  in ovl_free()
723 	struct ovl_fs_context *ctx = fc->fs_private;  in ovl_free()
738 static int ovl_reconfigure(struct fs_context *fc)  in ovl_reconfigure()  argument
740 	struct super_block *sb = fc->root->d_sb;  in ovl_reconfigure()
745 	if (!(fc->sb_flags & SB_RDONLY) && ovl_force_readonly(ofs))  in ovl_reconfigure()
748 	if (fc->sb_flags & SB_RDONLY && !sb_rdonly(sb)) {  in ovl_reconfigure()
775 int ovl_init_fs_context(struct fs_context *fc)  in ovl_init_fs_context()  argument
804 	fc->s_fs_info		= ofs;  in ovl_init_fs_context()
805 	fc->fs_private		= ctx;  in ovl_init_fs_context()
806 	fc->ops			= &ovl_context_ops;  in ovl_init_fs_context()