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