| 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
|---|---|
| 2 | |
| 3 | #include <linux/fs_context.h> |
| 4 | #include <linux/fs_parser.h> |
| 5 | |
| 6 | struct ovl_fs; |
| 7 | struct ovl_config; |
| 8 | |
| 9 | extern const struct fs_parameter_spec ovl_parameter_spec[]; |
| 10 | extern const struct constant_table ovl_parameter_redirect_dir[]; |
| 11 | |
| 12 | /* The set of options that user requested explicitly via mount options */ |
| 13 | struct 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 | |
| 22 | struct ovl_fs_context_layer { |
| 23 | char *name; |
| 24 | struct path path; |
| 25 | }; |
| 26 | |
| 27 | struct 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 | |
| 38 | int ovl_init_fs_context(struct fs_context *fc); |
| 39 | void ovl_free_fs(struct ovl_fs *ofs); |
| 40 | int ovl_fs_params_verify(const struct ovl_fs_context *ctx, |
| 41 | struct ovl_config *config); |
| 42 | int ovl_show_options(struct seq_file *m, struct dentry *dentry); |
| 43 | const char *ovl_xino_mode(struct ovl_config *config); |
| 44 |