[mirror_ubuntu-zesty-kernel.git] / fs / hostfs / hostfs.h

#ifndef __UM_FS_HOSTFS
#define __UM_FS_HOSTFS

#include <os.h>

/*
 * These are exactly the same definitions as in fs.h, but the names are
 * changed so that this file can be included in both kernel and user files.
 */

#define HOSTFS_ATTR_MODE	1
#define HOSTFS_ATTR_UID 	2
#define HOSTFS_ATTR_GID 	4
#define HOSTFS_ATTR_SIZE	8
#define HOSTFS_ATTR_ATIME	16
#define HOSTFS_ATTR_MTIME	32
#define HOSTFS_ATTR_CTIME	64
#define HOSTFS_ATTR_ATIME_SET	128
#define HOSTFS_ATTR_MTIME_SET	256

/* These two are unused by hostfs. */
#define HOSTFS_ATTR_FORCE	512	/* Not a change, but a change it */
#define HOSTFS_ATTR_ATTR_FLAG	1024

/*
 * If you are very careful, you'll notice that these two are missing:
 *
 * #define ATTR_KILL_SUID	2048
 * #define ATTR_KILL_SGID	4096
 *
 * and this is because they were added in 2.5 development.
 * Actually, they are not needed by most ->setattr() methods - they are set by
 * callers of notify_change() to notify that the setuid/setgid bits must be
 * dropped.
 * notify_change() will delete those flags, make sure attr->ia_valid & ATTR_MODE
 * is on, and remove the appropriate bits from attr->ia_mode (attr is a
 * "struct iattr *"). -BlaisorBlade
 */

struct hostfs_iattr {
	unsigned int	ia_valid;
	unsigned short	ia_mode;
	uid_t		ia_uid;
	gid_t		ia_gid;
	loff_t		ia_size;
	struct timespec	ia_atime;
	struct timespec	ia_mtime;
	struct timespec	ia_ctime;
};

struct hostfs_stat {
	unsigned long long ino;
	unsigned int mode;
	unsigned int nlink;
	unsigned int uid;
	unsigned int gid;
	unsigned long long size;
	struct timespec atime, mtime, ctime;
	unsigned int blksize;
	unsigned long long blocks;
	unsigned int maj;
	unsigned int min;
};

extern int stat_file(const char *path, struct hostfs_stat *p, int fd);
extern int access_file(char *path, int r, int w, int x);
extern int open_file(char *path, int r, int w, int append);
extern void *open_dir(char *path, int *err_out);
extern void seek_dir(void *stream, unsigned long long pos);
extern char *read_dir(void *stream, unsigned long long *pos_out,
		      unsigned long long *ino_out, int *len_out,
		      unsigned int *type_out);
extern void close_file(void *stream);
extern int replace_file(int oldfd, int fd);
extern void close_dir(void *stream);
extern int read_file(int fd, unsigned long long *offset, char *buf, int len);
extern int write_file(int fd, unsigned long long *offset, const char *buf,
		      int len);
extern int lseek_file(int fd, long long offset, int whence);
extern int fsync_file(int fd, int datasync);
extern int file_create(char *name, int mode);
extern int set_attr(const char *file, struct hostfs_iattr *attrs, int fd);
extern int make_symlink(const char *from, const char *to);
extern int unlink_file(const char *file);
extern int do_mkdir(const char *file, int mode);
extern int do_rmdir(const char *file);
extern int do_mknod(const char *file, int mode, unsigned int major,
		    unsigned int minor);
extern int link_file(const char *from, const char *to);
extern int hostfs_do_readlink(char *file, char *buf, int size);
extern int rename_file(char *from, char *to);
extern int rename2_file(char *from, char *to, unsigned int flags);
extern int do_statfs(char *root, long *bsize_out, long long *blocks_out,
		     long long *bfree_out, long long *bavail_out,
		     long long *files_out, long long *ffree_out,
		     void *fsid_out, int fsid_size, long *namelen_out);

#endif
Commit	Line	Data
1da177e4 LT	1	#ifndef __UM_FS_HOSTFS
	2	#define __UM_FS_HOSTFS
	3
37185b33	4	#include <os.h>
1da177e4	5
84b3db04 JD	6	/*
84b3db04 JD	7	* These are exactly the same definitions as in fs.h, but the names are
1da177e4 LT	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
84b3db04 JD	25	/*
84b3db04 JD	26	* If you are very careful, you'll notice that these two are missing:
1da177e4 LT	27	*
	28	* #define ATTR_KILL_SUID 2048
	29	* #define ATTR_KILL_SGID 4096
	30	*
631dd1a8	31	* and this is because they were added in 2.5 development.
1da177e4 LT	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
	40	struct hostfs_iattr {
	41	unsigned int ia_valid;
138d570d	42	unsigned short ia_mode;
1da177e4 LT	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;
1da177e4 LT	49	};
1da177e4 LT	50
39b743c6 AV	51	struct 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
	65	extern int stat_file(const char path, struct hostfs_stat p, int fd);
1da177e4 LT	66	extern int access_file(char *path, int r, int w, int x);
1da177e4 LT	67	extern int open_file(char *path, int r, int w, int append);
1da177e4	68	extern void open_dir(char path, int *err_out);
0c9bd636 RW	69	extern void seek_dir(void *stream, unsigned long long pos);
0c9bd636 RW	70	extern char read_dir(void stream, unsigned long long *pos_out,
3ee6bd8e GU	71	unsigned long long ino_out, int len_out,
3ee6bd8e GU	72	unsigned int *type_out);
1da177e4	73	extern void close_file(void *stream);
f8ad850f	74	extern int replace_file(int oldfd, int fd);
1da177e4 LT	75	extern void close_dir(void *stream);
	76	extern int read_file(int fd, unsigned long long offset, char buf, int len);
	77	extern int write_file(int fd, unsigned long long offset, const char buf,
	78	int len);
	79	extern int lseek_file(int fd, long long offset, int whence);
a2d76bd8	80	extern int fsync_file(int fd, int datasync);
b98b9102	81	extern int file_create(char *name, int mode);
5822b7fa	82	extern int set_attr(const char file, struct hostfs_iattr attrs, int fd);
1da177e4 LT	83	extern int make_symlink(const char from, const char to);
	84	extern int unlink_file(const char *file);
	85	extern int do_mkdir(const char *file, int mode);
	86	extern int do_rmdir(const char *file);
84b3db04 JD	87	extern int do_mknod(const char *file, int mode, unsigned int major,
84b3db04 JD	88	unsigned int minor);
1da177e4	89	extern int link_file(const char from, const char to);
ea7e743e	90	extern int hostfs_do_readlink(char file, char buf, int size);
1da177e4	91	extern int rename_file(char from, char to);
9a423bb6	92	extern int rename2_file(char from, char to, unsigned int flags);
1da177e4 LT	93	extern 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,
1b627d57	96	void fsid_out, int fsid_size, long namelen_out);
1da177e4 LT	97
1da177e4 LT	98	#endif