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	unsigned short	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 void seek_dir(void *stream, unsigned long long pos);
70extern char *read_dir(void *stream, unsigned long long *pos_out,
71		      unsigned long long *ino_out, int *len_out,
72		      unsigned int *type_out);
73extern void close_file(void *stream);
74extern int replace_file(int oldfd, int fd);
75extern void close_dir(void *stream);
76extern int read_file(int fd, unsigned long long *offset, char *buf, int len);
77extern int write_file(int fd, unsigned long long *offset, const char *buf,
78		      int len);
79extern int lseek_file(int fd, long long offset, int whence);
80extern int fsync_file(int fd, int datasync);
81extern int file_create(char *name, int mode);
82extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd);
83extern int make_symlink(const char *from, const char *to);
84extern int unlink_file(const char *file);
85extern int do_mkdir(const char *file, int mode);
86extern int do_rmdir(const char *file);
87extern int do_mknod(const char *file, int mode, unsigned int major,
88		    unsigned int minor);
89extern int link_file(const char *from, const char *to);
90extern int hostfs_do_readlink(char *file, char *buf, int size);
91extern int rename_file(char *from, char *to);
92extern int rename2_file(char *from, char *to, unsigned int flags);
93extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
94		     long long *bfree_out, long long *bavail_out,
95		     long long *files_out, long long *ffree_out,
96		     void *fsid_out, int fsid_size, long *namelen_out);
97
98#endif
99