1#ifndef __UM_FS_HOSTFS
2#define __UM_FS_HOSTFS
3
4#include "os.h"
5
6/* These are exactly the same definitions as in fs.h, but the names are
7 * changed so that this file can be included in both kernel and user files.
8 */
9
10#define HOSTFS_ATTR_MODE	1
11#define HOSTFS_ATTR_UID 	2
12#define HOSTFS_ATTR_GID 	4
13#define HOSTFS_ATTR_SIZE	8
14#define HOSTFS_ATTR_ATIME	16
15#define HOSTFS_ATTR_MTIME	32
16#define HOSTFS_ATTR_CTIME	64
17#define HOSTFS_ATTR_ATIME_SET	128
18#define HOSTFS_ATTR_MTIME_SET	256
19
20/* These two are unused by hostfs. */
21#define HOSTFS_ATTR_FORCE	512	/* Not a change, but a change it */
22#define HOSTFS_ATTR_ATTR_FLAG	1024
23
24/* If you are very careful, you'll notice that these two are missing:
25 *
26 * #define ATTR_KILL_SUID	2048
27 * #define ATTR_KILL_SGID	4096
28 *
29 * and this is because they were added in 2.5 development in this patch:
30 *
31 * http://linux.bkbits.net:8080/linux-2.5/
32 * cset@3caf4a12k4XgDzK7wyK-TGpSZ9u2Ww?nav=index.html
33 * |src/.|src/include|src/include/linux|related/include/linux/fs.h
34 *
35 * Actually, they are not needed by most ->setattr() methods - they are set by
36 * callers of notify_change() to notify that the setuid/setgid bits must be
37 * dropped.
38 * notify_change() will delete those flags, make sure attr->ia_valid & ATTR_MODE
39 * is on, and remove the appropriate bits from attr->ia_mode (attr is a
40 * "struct iattr *"). -BlaisorBlade
41 */
42
43struct hostfs_iattr {
44	unsigned int	ia_valid;
45	mode_t		ia_mode;
46	uid_t		ia_uid;
47	gid_t		ia_gid;
48	loff_t		ia_size;
49	struct timespec	ia_atime;
50	struct timespec	ia_mtime;
51	struct timespec	ia_ctime;
52};
53
54extern int stat_file(const char *path, unsigned long long *inode_out,
55		     int *mode_out, int *nlink_out, int *uid_out, int *gid_out,
56		     unsigned long long *size_out, struct timespec *atime_out,
57		     struct timespec *mtime_out, struct timespec *ctime_out,
58		     int *blksize_out, unsigned long long *blocks_out, int fd);
59extern int access_file(char *path, int r, int w, int x);
60extern int open_file(char *path, int r, int w, int append);
61extern int file_type(const char *path, int *maj, int *min);
62extern void *open_dir(char *path, int *err_out);
63extern char *read_dir(void *stream, unsigned long long *pos,
64		      unsigned long long *ino_out, int *len_out);
65extern void close_file(void *stream);
66extern void close_dir(void *stream);
67extern int read_file(int fd, unsigned long long *offset, char *buf, int len);
68extern int write_file(int fd, unsigned long long *offset, const char *buf,
69		      int len);
70extern int lseek_file(int fd, long long offset, int whence);
71extern int fsync_file(int fd, int datasync);
72extern int file_create(char *name, int ur, int uw, int ux, int gr,
73		       int gw, int gx, int or, int ow, int ox);
74extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd);
75extern int make_symlink(const char *from, const char *to);
76extern int unlink_file(const char *file);
77extern int do_mkdir(const char *file, int mode);
78extern int do_rmdir(const char *file);
79extern int do_mknod(const char *file, int mode, unsigned int major, unsigned int minor);
80extern int link_file(const char *from, const char *to);
81extern int do_readlink(char *file, char *buf, int size);
82extern int rename_file(char *from, char *to);
83extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
84		     long long *bfree_out, long long *bavail_out,
85		     long long *files_out, long long *ffree_out,
86		     void *fsid_out, int fsid_size, long *namelen_out,
87		     long *spare_out);
88
89#endif
90