1/* SPDX-License-Identifier: GPL-2.0-only */
 2
 3#include <linux/fs_context.h>
 4#include <linux/fs_parser.h>
 5
 6struct ovl_fs;
 7struct ovl_config;
 8
 9extern const struct fs_parameter_spec ovl_parameter_spec[];
10extern const struct constant_table ovl_parameter_redirect_dir[];
11
12/* The set of options that user requested explicitly via mount options */
13struct ovl_opt_set {
14	bool metacopy;
15	bool redirect;
16	bool nfs_export;
17	bool index;
18};
19
20#define OVL_MAX_STACK 500
21
22struct ovl_fs_context_layer {
23	char *name;
24	struct path path;
25};
26
27struct ovl_fs_context {
28	struct path upper;
29	struct path work;
30	size_t capacity;
31	size_t nr; /* includes nr_data */
32	size_t nr_data;
33	struct ovl_opt_set set;
34	struct ovl_fs_context_layer *lower;
35	char *lowerdir_all; /* user provided lowerdir string */
36};
37
38int ovl_init_fs_context(struct fs_context *fc);
39void ovl_free_fs(struct ovl_fs *ofs);
40int ovl_fs_params_verify(const struct ovl_fs_context *ctx,
41			 struct ovl_config *config);
42int ovl_show_options(struct seq_file *m, struct dentry *dentry);
43const char *ovl_xino_mode(struct ovl_config *config);