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 struct {
67 unsigned int maj;
68 unsigned int min;
69 } rdev, dev;
70 };
71
72 extern int stat_file(const char *path, struct hostfs_stat *p, int fd);
73 extern int access_file(char *path, int r, int w, int x);
74 extern int open_file(char *path, int r, int w, int append);
75 extern void *open_dir(char *path, int *err_out);
76 extern void seek_dir(void *stream, unsigned long long pos);
77 extern char *read_dir(void *stream, unsigned long long *pos_out,
78 unsigned long long *ino_out, int *len_out,
79 unsigned int *type_out);
80 extern void close_file(void *stream);
81 extern int replace_file(int oldfd, int fd);
82 extern void close_dir(void *stream);
83 extern int read_file(int fd, unsigned long long *offset, char *buf, int len);
84 extern int write_file(int fd, unsigned long long *offset, const char *buf,
85 int len);
86 extern int lseek_file(int fd, long long offset, int whence);
87 extern int fsync_file(int fd, int datasync);
88 extern int file_create(char *name, int mode);
89 extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd);
90 extern int make_symlink(const char *from, const char *to);
91 extern int unlink_file(const char *file);
92 extern int do_mkdir(const char *file, int mode);
93 extern int hostfs_do_rmdir(const char *file);
94 extern int do_mknod(const char *file, int mode, unsigned int major,
95 unsigned int minor);
96 extern int link_file(const char *to, const char *from);
97 extern int hostfs_do_readlink(char *file, char *buf, int size);
98 extern int rename_file(char *from, char *to);
99 extern int rename2_file(char *from, char *to, unsigned int flags);
100 extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
101 long long *bfree_out, long long *bavail_out,
102 long long *files_out, long long *ffree_out,
103 void *fsid_out, int fsid_size, long *namelen_out);
104
105 #endif
106
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