1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef __UM_FS_HOSTFS |
3 | #define __UM_FS_HOSTFS |
4 | |
5 | #include <os.h> |
6 | |
7 | /* |
8 | * These are exactly the same definitions as in fs.h, but the names are |
9 | * changed so that this file can be included in both kernel and user files. |
10 | */ |
11 | |
12 | #define HOSTFS_ATTR_MODE 1 |
13 | #define HOSTFS_ATTR_UID 2 |
14 | #define HOSTFS_ATTR_GID 4 |
15 | #define HOSTFS_ATTR_SIZE 8 |
16 | #define HOSTFS_ATTR_ATIME 16 |
17 | #define HOSTFS_ATTR_MTIME 32 |
18 | #define HOSTFS_ATTR_CTIME 64 |
19 | #define HOSTFS_ATTR_ATIME_SET 128 |
20 | #define HOSTFS_ATTR_MTIME_SET 256 |
21 | |
22 | /* This one is unused by hostfs. */ |
23 | #define HOSTFS_ATTR_FORCE 512 /* Not a change, but a change it */ |
24 | #define HOSTFS_ATTR_ATTR_FLAG 1024 |
25 | |
26 | /* |
27 | * If you are very careful, you'll notice that these two are missing: |
28 | * |
29 | * #define ATTR_KILL_SUID 2048 |
30 | * #define ATTR_KILL_SGID 4096 |
31 | * |
32 | * and this is because they were added in 2.5 development. |
33 | * Actually, they are not needed by most ->setattr() methods - they are set by |
34 | * callers of notify_change() to notify that the setuid/setgid bits must be |
35 | * dropped. |
36 | * notify_change() will delete those flags, make sure attr->ia_valid & ATTR_MODE |
37 | * is on, and remove the appropriate bits from attr->ia_mode (attr is a |
38 | * "struct iattr *"). -BlaisorBlade |
39 | */ |
40 | struct hostfs_timespec { |
41 | long long tv_sec; |
42 | long long tv_nsec; |
43 | }; |
44 | |
45 | struct hostfs_iattr { |
46 | unsigned int ia_valid; |
47 | unsigned short ia_mode; |
48 | uid_t ia_uid; |
49 | gid_t ia_gid; |
50 | loff_t ia_size; |
51 | struct hostfs_timespec ia_atime; |
52 | struct hostfs_timespec ia_mtime; |
53 | struct hostfs_timespec ia_ctime; |
54 | }; |
55 | |
56 | struct hostfs_stat { |
57 | unsigned long long ino; |
58 | unsigned int mode; |
59 | unsigned int nlink; |
60 | unsigned int uid; |
61 | unsigned int gid; |
62 | unsigned long long size; |
63 | struct hostfs_timespec atime, mtime, ctime; |
64 | unsigned int blksize; |
65 | unsigned long long blocks; |
66 | unsigned int maj; |
67 | unsigned int min; |
68 | dev_t dev; |
69 | }; |
70 | |
71 | extern int stat_file(const char *path, struct hostfs_stat *p, int fd); |
72 | extern int access_file(char *path, int r, int w, int x); |
73 | extern int open_file(char *path, int r, int w, int append); |
74 | extern void *open_dir(char *path, int *err_out); |
75 | extern void seek_dir(void *stream, unsigned long long pos); |
76 | extern char *read_dir(void *stream, unsigned long long *pos_out, |
77 | unsigned long long *ino_out, int *len_out, |
78 | unsigned int *type_out); |
79 | extern void close_file(void *stream); |
80 | extern int replace_file(int oldfd, int fd); |
81 | extern void close_dir(void *stream); |
82 | extern int read_file(int fd, unsigned long long *offset, char *buf, int len); |
83 | extern int write_file(int fd, unsigned long long *offset, const char *buf, |
84 | int len); |
85 | extern int lseek_file(int fd, long long offset, int whence); |
86 | extern int fsync_file(int fd, int datasync); |
87 | extern int file_create(char *name, int mode); |
88 | extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd); |
89 | extern int make_symlink(const char *from, const char *to); |
90 | extern int unlink_file(const char *file); |
91 | extern int do_mkdir(const char *file, int mode); |
92 | extern int hostfs_do_rmdir(const char *file); |
93 | extern int do_mknod(const char *file, int mode, unsigned int major, |
94 | unsigned int minor); |
95 | extern int link_file(const char *to, const char *from); |
96 | extern int hostfs_do_readlink(char *file, char *buf, int size); |
97 | extern int rename_file(char *from, char *to); |
98 | extern int rename2_file(char *from, char *to, unsigned int flags); |
99 | extern int do_statfs(char *root, long *bsize_out, long long *blocks_out, |
100 | long long *bfree_out, long long *bavail_out, |
101 | long long *files_out, long long *ffree_out, |
102 | void *fsid_out, int fsid_size, long *namelen_out); |
103 | |
104 | #endif |
105 | |