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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifndef __UM_FS_HOSTFS
2#define __UM_FS_HOSTFS
3
Al Viro37185b32012-10-08 03:27:32 +01004#include <os.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07005
Jeff Dike84b3db02007-10-16 01:27:13 -07006/*
7 * These are exactly the same definitions as in fs.h, but the names are
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * 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
Jeff Dike84b3db02007-10-16 01:27:13 -070025/*
26 * If you are very careful, you'll notice that these two are missing:
Linus Torvalds1da177e2005-04-16 15:20:36 -070027 *
28 * #define ATTR_KILL_SUID 2048
29 * #define ATTR_KILL_SGID 4096
30 *
Justin P. Mattock631dd1a2010-10-18 11:03:14 +020031 * and this is because they were added in 2.5 development.
Linus Torvalds1da177e2005-04-16 15:20:36 -070032 * 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;
Al Viro138d5702011-07-26 04:48:59 -040042 unsigned short ia_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070049};
50
Al Viro39b743c2010-06-06 20:08:56 -040051struct 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);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066extern int access_file(char *path, int r, int w, int x);
67extern int open_file(char *path, int r, int w, int append);
Linus Torvalds1da177e2005-04-16 15:20:36 -070068extern void *open_dir(char *path, int *err_out);
69extern char *read_dir(void *stream, unsigned long long *pos,
Geert Uytterhoeven3ee6bd82012-01-27 19:14:58 +010070 unsigned long long *ino_out, int *len_out,
71 unsigned int *type_out);
Linus Torvalds1da177e2005-04-16 15:20:36 -070072extern void close_file(void *stream);
Al Virof8ad8502010-06-06 23:49:18 -040073extern int replace_file(int oldfd, int fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074extern void close_dir(void *stream);
75extern int read_file(int fd, unsigned long long *offset, char *buf, int len);
76extern int write_file(int fd, unsigned long long *offset, const char *buf,
77 int len);
78extern int lseek_file(int fd, long long offset, int whence);
Paolo 'Blaisorblade' Giarrussoa2d76bd2005-07-28 21:16:15 -070079extern int fsync_file(int fd, int datasync);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080extern int file_create(char *name, int ur, int uw, int ux, int gr,
81 int gw, int gx, int or, int ow, int ox);
Alberto Bertogli5822b7f2007-05-08 00:23:16 -070082extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd);
Linus Torvalds1da177e2005-04-16 15:20:36 -070083extern 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);
Jeff Dike84b3db02007-10-16 01:27:13 -070087extern int do_mknod(const char *file, int mode, unsigned int major,
88 unsigned int minor);
Linus Torvalds1da177e2005-04-16 15:20:36 -070089extern int link_file(const char *from, const char *to);
WANG Congea7e7432008-11-19 15:36:46 -080090extern int hostfs_do_readlink(char *file, char *buf, int size);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091extern int rename_file(char *from, char *to);
92extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
93 long long *bfree_out, long long *bavail_out,
94 long long *files_out, long long *ffree_out,
Richard Weinberger1b627d52010-10-26 14:21:18 -070095 void *fsid_out, int fsid_size, long *namelen_out);
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
97#endif