[deliverable/linux.git] / include / uapi / linux / fs.h

#ifndef _UAPI_LINUX_FS_H
#define _UAPI_LINUX_FS_H

/*
 * This file has definitions for some important file table
 * structures etc.
 */

#include <linux/limits.h>
#include <linux/ioctl.h>
#include <linux/types.h>

/*
 * It's silly to have NR_OPEN bigger than NR_FILE, but you can change
 * the file limit at runtime and only root can increase the per-process
 * nr_file rlimit, so it's safe to set up a ridiculously high absolute
 * upper limit on files-per-process.
 *
 * Some programs (notably those using select()) may have to be 
 * recompiled to take full advantage of the new limits..  
 */

/* Fixed constants first: */
#undef NR_OPEN
#define INR_OPEN_CUR 1024	/* Initial setting for nfile rlimits */
#define INR_OPEN_MAX 4096	/* Hard limit for nfile rlimits */

#define BLOCK_SIZE_BITS 10
#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)

#define SEEK_SET	0	/* seek relative to beginning of file */
#define SEEK_CUR	1	/* seek relative to current file position */
#define SEEK_END	2	/* seek relative to end of file */
#define SEEK_DATA	3	/* seek to the next data */
#define SEEK_HOLE	4	/* seek to the next hole */
#define SEEK_MAX	SEEK_HOLE

#define RENAME_NOREPLACE	(1 << 0)	/* Don't overwrite target */

struct fstrim_range {
	__u64 start;
	__u64 len;
	__u64 minlen;
};

/* And dynamically-tunable limits and defaults: */
struct files_stat_struct {
	unsigned long nr_files;		/* read only */
	unsigned long nr_free_files;	/* read only */
	unsigned long max_files;		/* tunable */
};

struct inodes_stat_t {
	long nr_inodes;
	long nr_unused;
	long dummy[5];		/* padding for sysctl ABI compatibility */
};


#define NR_FILE  8192	/* this can well be larger on a larger system */


/*
 * These are the fs-independent mount-flags: up to 32 flags are supported
 */
#define MS_RDONLY	 1	/* Mount read-only */
#define MS_NOSUID	 2	/* Ignore suid and sgid bits */
#define MS_NODEV	 4	/* Disallow access to device special files */
#define MS_NOEXEC	 8	/* Disallow program execution */
#define MS_SYNCHRONOUS	16	/* Writes are synced at once */
#define MS_REMOUNT	32	/* Alter flags of a mounted FS */
#define MS_MANDLOCK	64	/* Allow mandatory locks on an FS */
#define MS_DIRSYNC	128	/* Directory modifications are synchronous */
#define MS_NOATIME	1024	/* Do not update access times. */
#define MS_NODIRATIME	2048	/* Do not update directory access times */
#define MS_BIND		4096
#define MS_MOVE		8192
#define MS_REC		16384
#define MS_VERBOSE	32768	/* War is peace. Verbosity is silence.
				   MS_VERBOSE is deprecated. */
#define MS_SILENT	32768
#define MS_POSIXACL	(1<<16)	/* VFS does not apply the umask */
#define MS_UNBINDABLE	(1<<17)	/* change to unbindable */
#define MS_PRIVATE	(1<<18)	/* change to private */
#define MS_SLAVE	(1<<19)	/* change to slave */
#define MS_SHARED	(1<<20)	/* change to shared */
#define MS_RELATIME	(1<<21)	/* Update atime relative to mtime/ctime. */
#define MS_KERNMOUNT	(1<<22) /* this is a kern_mount call */
#define MS_I_VERSION	(1<<23) /* Update inode I_version field */
#define MS_STRICTATIME	(1<<24) /* Always perform atime updates */

/* These sb flags are internal to the kernel */
#define MS_NOSEC	(1<<28)
#define MS_BORN		(1<<29)
#define MS_ACTIVE	(1<<30)
#define MS_NOUSER	(1<<31)

/*
 * Superblock flags that can be altered by MS_REMOUNT
 */
#define MS_RMT_MASK	(MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_I_VERSION)

/*
 * Old magic mount flag and mask
 */
#define MS_MGC_VAL 0xC0ED0000
#define MS_MGC_MSK 0xffff0000

/* the read-only stuff doesn't really belong here, but any other place is
   probably as bad and I don't want to create yet another include file. */

#define BLKROSET   _IO(0x12,93)	/* set device read-only (0 = read-write) */
#define BLKROGET   _IO(0x12,94)	/* get read-only status (0 = read_write) */
#define BLKRRPART  _IO(0x12,95)	/* re-read partition table */
#define BLKGETSIZE _IO(0x12,96)	/* return device size /512 (long *arg) */
#define BLKFLSBUF  _IO(0x12,97)	/* flush buffer cache */
#define BLKRASET   _IO(0x12,98)	/* set read ahead for block device */
#define BLKRAGET   _IO(0x12,99)	/* get current read ahead setting */
#define BLKFRASET  _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
#define BLKFRAGET  _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
#define BLKSSZGET  _IO(0x12,104)/* get block device sector size */
#if 0
#define BLKPG      _IO(0x12,105)/* See blkpg.h */

/* Some people are morons.  Do not use sizeof! */

#define BLKELVGET  _IOR(0x12,106,size_t)/* elevator get */
#define BLKELVSET  _IOW(0x12,107,size_t)/* elevator set */
/* This was here just to show that the number is taken -
   probably all these _IO(0x12,*) ioctls should be moved to blkpg.h. */
#endif
/* A jump here: 108-111 have been used for various private purposes. */
#define BLKBSZGET  _IOR(0x12,112,size_t)
#define BLKBSZSET  _IOW(0x12,113,size_t)
#define BLKGETSIZE64 _IOR(0x12,114,size_t)	/* return device size in bytes (u64 *arg) */
#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
#define BLKTRACESTART _IO(0x12,116)
#define BLKTRACESTOP _IO(0x12,117)
#define BLKTRACETEARDOWN _IO(0x12,118)
#define BLKDISCARD _IO(0x12,119)
#define BLKIOMIN _IO(0x12,120)
#define BLKIOOPT _IO(0x12,121)
#define BLKALIGNOFF _IO(0x12,122)
#define BLKPBSZGET _IO(0x12,123)
#define BLKDISCARDZEROES _IO(0x12,124)
#define BLKSECDISCARD _IO(0x12,125)
#define BLKROTATIONAL _IO(0x12,126)
#define BLKZEROOUT _IO(0x12,127)

#define BMAP_IOCTL 1		/* obsolete - kept for compatibility */
#define FIBMAP	   _IO(0x00,1)	/* bmap access */
#define FIGETBSZ   _IO(0x00,2)	/* get the block size used for bmap */
#define FIFREEZE	_IOWR('X', 119, int)	/* Freeze */
#define FITHAW		_IOWR('X', 120, int)	/* Thaw */
#define FITRIM		_IOWR('X', 121, struct fstrim_range)	/* Trim */

#define	FS_IOC_GETFLAGS			_IOR('f', 1, long)
#define	FS_IOC_SETFLAGS			_IOW('f', 2, long)
#define	FS_IOC_GETVERSION		_IOR('v', 1, long)
#define	FS_IOC_SETVERSION		_IOW('v', 2, long)
#define FS_IOC_FIEMAP			_IOWR('f', 11, struct fiemap)
#define FS_IOC32_GETFLAGS		_IOR('f', 1, int)
#define FS_IOC32_SETFLAGS		_IOW('f', 2, int)
#define FS_IOC32_GETVERSION		_IOR('v', 1, int)
#define FS_IOC32_SETVERSION		_IOW('v', 2, int)

/*
 * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
 */
#define	FS_SECRM_FL			0x00000001 /* Secure deletion */
#define	FS_UNRM_FL			0x00000002 /* Undelete */
#define	FS_COMPR_FL			0x00000004 /* Compress file */
#define FS_SYNC_FL			0x00000008 /* Synchronous updates */
#define FS_IMMUTABLE_FL			0x00000010 /* Immutable file */
#define FS_APPEND_FL			0x00000020 /* writes to file may only append */
#define FS_NODUMP_FL			0x00000040 /* do not dump file */
#define FS_NOATIME_FL			0x00000080 /* do not update atime */
/* Reserved for compression usage... */
#define FS_DIRTY_FL			0x00000100
#define FS_COMPRBLK_FL			0x00000200 /* One or more compressed clusters */
#define FS_NOCOMP_FL			0x00000400 /* Don't compress */
#define FS_ECOMPR_FL			0x00000800 /* Compression error */
/* End compression flags --- maybe not all used */
#define FS_BTREE_FL			0x00001000 /* btree format dir */
#define FS_INDEX_FL			0x00001000 /* hash-indexed directory */
#define FS_IMAGIC_FL			0x00002000 /* AFS directory */
#define FS_JOURNAL_DATA_FL		0x00004000 /* Reserved for ext3 */
#define FS_NOTAIL_FL			0x00008000 /* file tail should not be merged */
#define FS_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
#define FS_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
#define FS_EXTENT_FL			0x00080000 /* Extents */
#define FS_DIRECTIO_FL			0x00100000 /* Use direct i/o */
#define FS_NOCOW_FL			0x00800000 /* Do not cow file */
#define FS_RESERVED_FL			0x80000000 /* reserved for ext2 lib */

#define FS_FL_USER_VISIBLE		0x0003DFFF /* User visible flags */
#define FS_FL_USER_MODIFIABLE		0x000380FF /* User modifiable flags */


#define SYNC_FILE_RANGE_WAIT_BEFORE	1
#define SYNC_FILE_RANGE_WRITE		2
#define SYNC_FILE_RANGE_WAIT_AFTER	4

#endif /* _UAPI_LINUX_FS_H */
Commit	Line	Data
607ca46e DH	1	#ifndef _UAPI_LINUX_FS_H
	2	#define _UAPI_LINUX_FS_H
	3
	4	/*
	5	* This file has definitions for some important file table
	6	* structures etc.
	7	*/
	8
	9	#include <linux/limits.h>
	10	#include <linux/ioctl.h>
	11	#include <linux/types.h>
	12
	13	/*
	14	* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
	15	* the file limit at runtime and only root can increase the per-process
	16	* nr_file rlimit, so it's safe to set up a ridiculously high absolute
	17	* upper limit on files-per-process.
	18	*
	19	* Some programs (notably those using select()) may have to be
	20	* recompiled to take full advantage of the new limits..
	21	*/
	22
	23	/* Fixed constants first: */
	24	#undef NR_OPEN
	25	#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */
	26	#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */
	27
	28	#define BLOCK_SIZE_BITS 10
	29	#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
	30
	31	#define SEEK_SET 0 /* seek relative to beginning of file */
	32	#define SEEK_CUR 1 /* seek relative to current file position */
	33	#define SEEK_END 2 /* seek relative to end of file */
	34	#define SEEK_DATA 3 /* seek to the next data */
	35	#define SEEK_HOLE 4 /* seek to the next hole */
	36	#define SEEK_MAX SEEK_HOLE
	37
0a7c3937 MS	38	#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
0a7c3937 MS	39
607ca46e DH	40	struct fstrim_range {
	41	__u64 start;
	42	__u64 len;
	43	__u64 minlen;
	44	};
	45
	46	/* And dynamically-tunable limits and defaults: */
	47	struct files_stat_struct {
	48	unsigned long nr_files; /* read only */
	49	unsigned long nr_free_files; /* read only */
	50	unsigned long max_files; /* tunable */
	51	};
	52
	53	struct inodes_stat_t {
3942c07c GC	54	long nr_inodes;
	55	long nr_unused;
	56	long dummy[5]; /* padding for sysctl ABI compatibility */
607ca46e DH	57	};
	58
	59
	60	#define NR_FILE 8192 /* this can well be larger on a larger system */
	61
607ca46e DH	62
	63	/*
	64	* These are the fs-independent mount-flags: up to 32 flags are supported
	65	*/
	66	#define MS_RDONLY 1 /* Mount read-only */
	67	#define MS_NOSUID 2 /* Ignore suid and sgid bits */
	68	#define MS_NODEV 4 /* Disallow access to device special files */
	69	#define MS_NOEXEC 8 /* Disallow program execution */
	70	#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
	71	#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
	72	#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
	73	#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
	74	#define MS_NOATIME 1024 /* Do not update access times. */
	75	#define MS_NODIRATIME 2048 /* Do not update directory access times */
	76	#define MS_BIND 4096
	77	#define MS_MOVE 8192
	78	#define MS_REC 16384
	79	#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
	80	MS_VERBOSE is deprecated. */
	81	#define MS_SILENT 32768
	82	#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
	83	#define MS_UNBINDABLE (1<<17) /* change to unbindable */
	84	#define MS_PRIVATE (1<<18) /* change to private */
	85	#define MS_SLAVE (1<<19) /* change to slave */
	86	#define MS_SHARED (1<<20) /* change to shared */
	87	#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
	88	#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
	89	#define MS_I_VERSION (1<<23) /* Update inode I_version field */
	90	#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
ffecfd1a DW	91
ffecfd1a DW	92	/* These sb flags are internal to the kernel */
607ca46e DH	93	#define MS_NOSEC (1<<28)
	94	#define MS_BORN (1<<29)
	95	#define MS_ACTIVE (1<<30)
	96	#define MS_NOUSER (1<<31)
	97
	98	/*
	99	* Superblock flags that can be altered by MS_REMOUNT
	100	*/
	101	#define MS_RMT_MASK (MS_RDONLY\|MS_SYNCHRONOUS\|MS_MANDLOCK\|MS_I_VERSION)
	102
	103	/*
	104	* Old magic mount flag and mask
	105	*/
	106	#define MS_MGC_VAL 0xC0ED0000
	107	#define MS_MGC_MSK 0xffff0000
	108
607ca46e DH	109	/* the read-only stuff doesn't really belong here, but any other place is
	110	probably as bad and I don't want to create yet another include file. */
	111
	112	#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
	113	#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
	114	#define BLKRRPART _IO(0x12,95) /* re-read partition table */
	115	#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long arg) /
	116	#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
	117	#define BLKRASET _IO(0x12,98) /* set read ahead for block device */
	118	#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
	119	#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
	120	#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
	121	#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
	122	#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
	123	#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
	124	#if 0
	125	#define BLKPG _IO(0x12,105)/* See blkpg.h */
	126
	127	/* Some people are morons. Do not use sizeof! */
	128
	129	#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */
	130	#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */
	131	/* This was here just to show that the number is taken -
	132	probably all these _IO(0x12,) ioctls should be moved to blkpg.h. /
	133	#endif
	134	/* A jump here: 108-111 have been used for various private purposes. */
	135	#define BLKBSZGET _IOR(0x12,112,size_t)
	136	#define BLKBSZSET _IOW(0x12,113,size_t)
	137	#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 arg) /
	138	#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
	139	#define BLKTRACESTART _IO(0x12,116)
	140	#define BLKTRACESTOP _IO(0x12,117)
	141	#define BLKTRACETEARDOWN _IO(0x12,118)
	142	#define BLKDISCARD _IO(0x12,119)
	143	#define BLKIOMIN _IO(0x12,120)
	144	#define BLKIOOPT _IO(0x12,121)
	145	#define BLKALIGNOFF _IO(0x12,122)
	146	#define BLKPBSZGET _IO(0x12,123)
	147	#define BLKDISCARDZEROES _IO(0x12,124)
	148	#define BLKSECDISCARD _IO(0x12,125)
	149	#define BLKROTATIONAL _IO(0x12,126)
	150	#define BLKZEROOUT _IO(0x12,127)
	151
	152	#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
	153	#define FIBMAP _IO(0x00,1) /* bmap access */
	154	#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
	155	#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
	156	#define FITHAW _IOWR('X', 120, int) /* Thaw */
	157	#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
	158
	159	#define FS_IOC_GETFLAGS _IOR('f', 1, long)
	160	#define FS_IOC_SETFLAGS _IOW('f', 2, long)
	161	#define FS_IOC_GETVERSION _IOR('v', 1, long)
	162	#define FS_IOC_SETVERSION _IOW('v', 2, long)
	163	#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
	164	#define FS_IOC32_GETFLAGS _IOR('f', 1, int)
	165	#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
	166	#define FS_IOC32_GETVERSION _IOR('v', 1, int)
	167	#define FS_IOC32_SETVERSION _IOW('v', 2, int)
	168
	169	/*
	170	* Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
	171	*/
	172	#define FS_SECRM_FL 0x00000001 /* Secure deletion */
173	#define FS_UNRM_FL 0x00000002 /* Undelete */
174	#define FS_COMPR_FL 0x00000004 /* Compress file */
175	#define FS_SYNC_FL 0x00000008 /* Synchronous updates */
176	#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
177	#define FS_APPEND_FL 0x00000020 /* writes to file may only append */
178	#define FS_NODUMP_FL 0x00000040 /* do not dump file */
179	#define FS_NOATIME_FL 0x00000080 /* do not update atime */
180	/* Reserved for compression usage... */
181	#define FS_DIRTY_FL 0x00000100
182	#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
183	#define FS_NOCOMP_FL 0x00000400 /* Don't compress */
184	#define FS_ECOMPR_FL 0x00000800 /* Compression error */
185	/* End compression flags --- maybe not all used */
186	#define FS_BTREE_FL 0x00001000 /* btree format dir */
187	#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */
188	#define FS_IMAGIC_FL 0x00002000 /* AFS directory */
189	#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
190	#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
191	#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
192	#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
193	#define FS_EXTENT_FL 0x00080000 /* Extents */
194	#define FS_DIRECTIO_FL 0x00100000 /* Use direct i/o */
195	#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
196	#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
197
198	#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
199	#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
200
201
202	#define SYNC_FILE_RANGE_WAIT_BEFORE 1
203	#define SYNC_FILE_RANGE_WRITE 2
204	#define SYNC_FILE_RANGE_WAIT_AFTER 4
205
206	#endif /* _UAPI_LINUX_FS_H */