[mirror_ubuntu-artful-kernel.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
 * and constants and structures used by various generic file system
 * ioctl's.  Please do not make any changes in this file before
 * sending patches for review to linux-fsdevel@vger.kernel.org and
 * linux-api@vger.kernel.org.
 */

#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 */
#define RENAME_EXCHANGE		(1 << 1)	/* Exchange source and dest */
#define RENAME_WHITEOUT		(1 << 2)	/* Whiteout source */

struct file_clone_range {
	__s64 src_fd;
	__u64 src_offset;
	__u64 src_length;
	__u64 dest_offset;
};

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

/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
#define FILE_DEDUPE_RANGE_SAME		0
#define FILE_DEDUPE_RANGE_DIFFERS	1

/* from struct btrfs_ioctl_file_extent_same_info */
struct file_dedupe_range_info {
	__s64 dest_fd;		/* in - destination file */
	__u64 dest_offset;	/* in - start of extent in destination */
	__u64 bytes_deduped;	/* out - total # of bytes we were able
				 * to dedupe from this file. */
	/* status of this dedupe operation:
	 * < 0 for error
	 * == FILE_DEDUPE_RANGE_SAME if dedupe succeeds
	 * == FILE_DEDUPE_RANGE_DIFFERS if data differs
	 */
	__s32 status;		/* out - see above description */
	__u32 reserved;		/* must be zero */
};

/* from struct btrfs_ioctl_file_extent_same_args */
struct file_dedupe_range {
	__u64 src_offset;	/* in - start of extent in source */
	__u64 src_length;	/* in - length of extent */
	__u16 dest_count;	/* in - total elements in info array */
	__u16 reserved1;	/* must be zero */
	__u32 reserved2;	/* must be zero */
	struct file_dedupe_range_info info[0];
};

/* 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 */
#define MS_LAZYTIME	(1<<25) /* Update the on-disk [acm]times lazily */

/* These sb flags are internal to the kernel */
#define MS_SUBMOUNT     (1<<26)
#define MS_NOREMOTELOCK	(1<<27)
#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|\
			 MS_LAZYTIME)

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

/*
 * Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
 */
struct fsxattr {
	__u32		fsx_xflags;	/* xflags field value (get/set) */
	__u32		fsx_extsize;	/* extsize field value (get/set)*/
	__u32		fsx_nextents;	/* nextents field value (get)	*/
	__u32		fsx_projid;	/* project identifier (get/set) */
	__u32		fsx_cowextsize;	/* CoW extsize field value (get/set)*/
	unsigned char	fsx_pad[8];
};

/*
 * Flags for the fsx_xflags field
 */
#define FS_XFLAG_REALTIME	0x00000001	/* data in realtime volume */
#define FS_XFLAG_PREALLOC	0x00000002	/* preallocated file extents */
#define FS_XFLAG_IMMUTABLE	0x00000008	/* file cannot be modified */
#define FS_XFLAG_APPEND		0x00000010	/* all writes append */
#define FS_XFLAG_SYNC		0x00000020	/* all writes synchronous */
#define FS_XFLAG_NOATIME	0x00000040	/* do not update access time */
#define FS_XFLAG_NODUMP		0x00000080	/* do not include in backups */
#define FS_XFLAG_RTINHERIT	0x00000100	/* create with rt bit set */
#define FS_XFLAG_PROJINHERIT	0x00000200	/* create with parents projid */
#define FS_XFLAG_NOSYMLINKS	0x00000400	/* disallow symlink creation */
#define FS_XFLAG_EXTSIZE	0x00000800	/* extent size allocator hint */
#define FS_XFLAG_EXTSZINHERIT	0x00001000	/* inherit inode extent size */
#define FS_XFLAG_NODEFRAG	0x00002000	/* do not defragment */
#define FS_XFLAG_FILESTREAM	0x00004000	/* use filestream allocator */
#define FS_XFLAG_DAX		0x00008000	/* use DAX for IO */
#define FS_XFLAG_COWEXTSIZE	0x00010000	/* CoW extent size allocator hint */
#define FS_XFLAG_HASATTR	0x80000000	/* no DIFLAG for this	*/

/* 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)
/*
 * A jump here: 130-131 are reserved for zoned block devices
 * (see uapi/linux/blkzoned.h)
 */

#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 FICLONE		_IOW(0x94, 9, int)
#define FICLONERANGE	_IOW(0x94, 13, struct file_clone_range)
#define FIDEDUPERANGE	_IOWR(0x94, 54, struct file_dedupe_range)

#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)
#define FS_IOC_FSGETXATTR		_IOR ('X', 31, struct fsxattr)
#define FS_IOC_FSSETXATTR		_IOW ('X', 32, struct fsxattr)

/*
 * File system encryption support
 */
/* Policy provided via an ioctl on the topmost directory */
#define FS_KEY_DESCRIPTOR_SIZE	8

#define FS_POLICY_FLAGS_PAD_4		0x00
#define FS_POLICY_FLAGS_PAD_8		0x01
#define FS_POLICY_FLAGS_PAD_16		0x02
#define FS_POLICY_FLAGS_PAD_32		0x03
#define FS_POLICY_FLAGS_PAD_MASK	0x03
#define FS_POLICY_FLAGS_VALID		0x03

/* Encryption algorithms */
#define FS_ENCRYPTION_MODE_INVALID		0
#define FS_ENCRYPTION_MODE_AES_256_XTS		1
#define FS_ENCRYPTION_MODE_AES_256_GCM		2
#define FS_ENCRYPTION_MODE_AES_256_CBC		3
#define FS_ENCRYPTION_MODE_AES_256_CTS		4

struct fscrypt_policy {
	__u8 version;
	__u8 contents_encryption_mode;
	__u8 filenames_encryption_mode;
	__u8 flags;
	__u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE];
};

#define FS_IOC_SET_ENCRYPTION_POLICY	_IOR('f', 19, struct fscrypt_policy)
#define FS_IOC_GET_ENCRYPTION_PWSALT	_IOW('f', 20, __u8[16])
#define FS_IOC_GET_ENCRYPTION_POLICY	_IOW('f', 21, struct fscrypt_policy)

/* Parameters for passing an encryption key into the kernel keyring */
#define FS_KEY_DESC_PREFIX		"fscrypt:"
#define FS_KEY_DESC_PREFIX_SIZE		8

/* Structure that userspace passes to the kernel keyring */
#define FS_MAX_KEY_SIZE			64

struct fscrypt_key {
	__u32 mode;
	__u8 raw[FS_MAX_KEY_SIZE];
	__u32 size;
};

/*
 * Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
 *
 * Note: for historical reasons, these flags were originally used and
 * defined for use by ext2/ext3, and then other file systems started
 * using these flags so they wouldn't need to write their own version
 * of chattr/lsattr (which was shipped as part of e2fsprogs).  You
 * should think twice before trying to use these flags in new
 * contexts, or trying to assign these flags, since they are used both
 * as the UAPI and the on-disk encoding for ext2/3/4.  Also, we are
 * almost out of 32-bit flags.  :-)
 *
 * We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from
 * XFS to the generic FS level interface.  This uses a structure that
 * has padding and hence has more room to grow, so it may be more
 * appropriate for many new use cases.
 *
 * Please do not change these flags or interfaces before checking with
 * linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org.
 */
#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 */
/* End compression flags --- maybe not all used */
#define FS_ENCRYPT_FL			0x00000800 /* Encrypted file */
#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_HUGE_FILE_FL			0x00040000 /* Reserved for ext4 */
#define FS_EXTENT_FL			0x00080000 /* Extents */
#define FS_EA_INODE_FL			0x00200000 /* Inode used for large EA */
#define FS_EOFBLOCKS_FL			0x00400000 /* Reserved for ext4 */
#define FS_NOCOW_FL			0x00800000 /* Do not cow file */
#define FS_INLINE_DATA_FL		0x10000000 /* Reserved for ext4 */
#define FS_PROJINHERIT_FL		0x20000000 /* Create with parents projid */
#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

/* flags for preadv2/pwritev2: */
#define RWF_HIPRI			0x00000001 /* high priority request, poll if possible */
#define RWF_DSYNC			0x00000002 /* per-IO O_DSYNC */
#define RWF_SYNC			0x00000004 /* per-IO O_SYNC */

#define RWF_SUPPORTED			(RWF_HIPRI | RWF_DSYNC | RWF_SYNC)

#endif /* _UAPI_LINUX_FS_H */
Commit	Line	Data
607ca46e DH	1	#ifndef _UAPI_LINUX_FS_H
	2	#define _UAPI_LINUX_FS_H
	3
	4	/*
68ce7bfc TT	5	* This file has definitions for some important file table structures
	6	* and constants and structures used by various generic file system
	7	* ioctl's. Please do not make any changes in this file before
	8	* sending patches for review to linux-fsdevel@vger.kernel.org and
	9	* linux-api@vger.kernel.org.
607ca46e DH	10	*/
	11
	12	#include <linux/limits.h>
	13	#include <linux/ioctl.h>
	14	#include <linux/types.h>
	15
	16	/*
	17	* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
	18	* the file limit at runtime and only root can increase the per-process
	19	* nr_file rlimit, so it's safe to set up a ridiculously high absolute
	20	* upper limit on files-per-process.
	21	*
	22	* Some programs (notably those using select()) may have to be
	23	* recompiled to take full advantage of the new limits..
	24	*/
	25
	26	/* Fixed constants first: */
	27	#undef NR_OPEN
	28	#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */
	29	#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */
	30
	31	#define BLOCK_SIZE_BITS 10
	32	#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
	33
	34	#define SEEK_SET 0 /* seek relative to beginning of file */
	35	#define SEEK_CUR 1 /* seek relative to current file position */
	36	#define SEEK_END 2 /* seek relative to end of file */
	37	#define SEEK_DATA 3 /* seek to the next data */
	38	#define SEEK_HOLE 4 /* seek to the next hole */
	39	#define SEEK_MAX SEEK_HOLE
	40
0a7c3937	41	#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
da1ce067	42	#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
0d7a8555	43	#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */
0a7c3937	44
04b38d60 CH	45	struct file_clone_range {
	46	__s64 src_fd;
	47	__u64 src_offset;
	48	__u64 src_length;
	49	__u64 dest_offset;
	50	};
	51
607ca46e DH	52	struct fstrim_range {
	53	__u64 start;
	54	__u64 len;
	55	__u64 minlen;
	56	};
	57
54dbc151 DW	58	/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
	59	#define FILE_DEDUPE_RANGE_SAME 0
	60	#define FILE_DEDUPE_RANGE_DIFFERS 1
	61
	62	/* from struct btrfs_ioctl_file_extent_same_info */
	63	struct file_dedupe_range_info {
	64	__s64 dest_fd; /* in - destination file */
	65	__u64 dest_offset; /* in - start of extent in destination */
	66	__u64 bytes_deduped; /* out - total # of bytes we were able
	67	* to dedupe from this file. */
	68	/* status of this dedupe operation:
	69	* < 0 for error
	70	* == FILE_DEDUPE_RANGE_SAME if dedupe succeeds
	71	* == FILE_DEDUPE_RANGE_DIFFERS if data differs
	72	*/
	73	__s32 status; /* out - see above description */
	74	__u32 reserved; /* must be zero */
	75	};
	76
	77	/* from struct btrfs_ioctl_file_extent_same_args */
	78	struct file_dedupe_range {
	79	__u64 src_offset; /* in - start of extent in source */
	80	__u64 src_length; /* in - length of extent */
	81	__u16 dest_count; /* in - total elements in info array */
	82	__u16 reserved1; /* must be zero */
	83	__u32 reserved2; /* must be zero */
	84	struct file_dedupe_range_info info[0];
	85	};
	86
607ca46e DH	87	/* And dynamically-tunable limits and defaults: */
	88	struct files_stat_struct {
	89	unsigned long nr_files; /* read only */
	90	unsigned long nr_free_files; /* read only */
	91	unsigned long max_files; /* tunable */
	92	};
	93
	94	struct inodes_stat_t {
3942c07c GC	95	long nr_inodes;
	96	long nr_unused;
	97	long dummy[5]; /* padding for sysctl ABI compatibility */
607ca46e DH	98	};
	99
	100
	101	#define NR_FILE 8192 /* this can well be larger on a larger system */
	102
607ca46e DH	103
	104	/*
	105	* These are the fs-independent mount-flags: up to 32 flags are supported
	106	*/
	107	#define MS_RDONLY 1 /* Mount read-only */
	108	#define MS_NOSUID 2 /* Ignore suid and sgid bits */
	109	#define MS_NODEV 4 /* Disallow access to device special files */
	110	#define MS_NOEXEC 8 /* Disallow program execution */
	111	#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
	112	#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
	113	#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
	114	#define MS_DIRSYNC 128 /* Directory modifications are synchronous */
	115	#define MS_NOATIME 1024 /* Do not update access times. */
	116	#define MS_NODIRATIME 2048 /* Do not update directory access times */
	117	#define MS_BIND 4096
	118	#define MS_MOVE 8192
	119	#define MS_REC 16384
	120	#define MS_VERBOSE 32768 /* War is peace. Verbosity is silence.
	121	MS_VERBOSE is deprecated. */
	122	#define MS_SILENT 32768
	123	#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */
	124	#define MS_UNBINDABLE (1<<17) /* change to unbindable */
	125	#define MS_PRIVATE (1<<18) /* change to private */
	126	#define MS_SLAVE (1<<19) /* change to slave */
	127	#define MS_SHARED (1<<20) /* change to shared */
	128	#define MS_RELATIME (1<<21) /* Update atime relative to mtime/ctime. */
	129	#define MS_KERNMOUNT (1<<22) /* this is a kern_mount call */
	130	#define MS_I_VERSION (1<<23) /* Update inode I_version field */
	131	#define MS_STRICTATIME (1<<24) /* Always perform atime updates */
0ae45f63	132	#define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */
ffecfd1a DW	133
ffecfd1a DW	134	/* These sb flags are internal to the kernel */
93faccbb	135	#define MS_SUBMOUNT (1<<26)
c568d683	136	#define MS_NOREMOTELOCK (1<<27)
607ca46e DH	137	#define MS_NOSEC (1<<28)
	138	#define MS_BORN (1<<29)
	139	#define MS_ACTIVE (1<<30)
	140	#define MS_NOUSER (1<<31)
	141
	142	/*
	143	* Superblock flags that can be altered by MS_REMOUNT
	144	*/
0ae45f63 TT	145	#define MS_RMT_MASK (MS_RDONLY\|MS_SYNCHRONOUS\|MS_MANDLOCK\|MS_I_VERSION\|\
0ae45f63 TT	146	MS_LAZYTIME)
607ca46e DH	147
	148	/*
	149	* Old magic mount flag and mask
	150	*/
	151	#define MS_MGC_VAL 0xC0ED0000
	152	#define MS_MGC_MSK 0xffff0000
	153
334e580a DC	154	/*
	155	* Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
	156	*/
	157	struct fsxattr {
	158	__u32 fsx_xflags; /* xflags field value (get/set) */
	159	__u32 fsx_extsize; /* extsize field value (get/set)*/
	160	__u32 fsx_nextents; /* nextents field value (get) */
	161	__u32 fsx_projid; /* project identifier (get/set) */
0a6eab8b DW	162	__u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/
0a6eab8b DW	163	unsigned char fsx_pad[8];
334e580a DC	164	};
	165
	166	/*
	167	* Flags for the fsx_xflags field
	168	*/
	169	#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */
	170	#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */
	171	#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */
	172	#define FS_XFLAG_APPEND 0x00000010 /* all writes append */
	173	#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */
	174	#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */
	175	#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */
	176	#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */
	177	#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */
	178	#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */
	179	#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */
	180	#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
	181	#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
	182	#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
58f88ca2	183	#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
0a6eab8b	184	#define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */
334e580a DC	185	#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
334e580a DC	186
607ca46e DH	187	/* the read-only stuff doesn't really belong here, but any other place is
	188	probably as bad and I don't want to create yet another include file. */
	189
	190	#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
	191	#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
	192	#define BLKRRPART _IO(0x12,95) /* re-read partition table */
	193	#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long arg) /
	194	#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
	195	#define BLKRASET _IO(0x12,98) /* set read ahead for block device */
	196	#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
	197	#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
	198	#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
	199	#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
	200	#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
	201	#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
	202	#if 0
	203	#define BLKPG _IO(0x12,105)/* See blkpg.h */
	204
	205	/* Some people are morons. Do not use sizeof! */
	206
	207	#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */
	208	#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */
	209	/* This was here just to show that the number is taken -
	210	probably all these _IO(0x12,) ioctls should be moved to blkpg.h. /
	211	#endif
	212	/* A jump here: 108-111 have been used for various private purposes. */
	213	#define BLKBSZGET _IOR(0x12,112,size_t)
	214	#define BLKBSZSET _IOW(0x12,113,size_t)
	215	#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 arg) /
	216	#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
	217	#define BLKTRACESTART _IO(0x12,116)
	218	#define BLKTRACESTOP _IO(0x12,117)
	219	#define BLKTRACETEARDOWN _IO(0x12,118)
	220	#define BLKDISCARD _IO(0x12,119)
	221	#define BLKIOMIN _IO(0x12,120)
	222	#define BLKIOOPT _IO(0x12,121)
	223	#define BLKALIGNOFF _IO(0x12,122)
	224	#define BLKPBSZGET _IO(0x12,123)
	225	#define BLKDISCARDZEROES _IO(0x12,124)
	226	#define BLKSECDISCARD _IO(0x12,125)
	227	#define BLKROTATIONAL _IO(0x12,126)
	228	#define BLKZEROOUT _IO(0x12,127)
3ed05a98 ST	229	/*
	230	* A jump here: 130-131 are reserved for zoned block devices
	231	* (see uapi/linux/blkzoned.h)
	232	*/
607ca46e DH	233
	234	#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
	235	#define FIBMAP _IO(0x00,1) /* bmap access */
	236	#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
	237	#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
	238	#define FITHAW _IOWR('X', 120, int) /* Thaw */
	239	#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
04b38d60 CH	240	#define FICLONE _IOW(0x94, 9, int)
04b38d60 CH	241	#define FICLONERANGE _IOW(0x94, 13, struct file_clone_range)
54dbc151	242	#define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range)
607ca46e DH	243
	244	#define FS_IOC_GETFLAGS _IOR('f', 1, long)
	245	#define FS_IOC_SETFLAGS _IOW('f', 2, long)
	246	#define FS_IOC_GETVERSION _IOR('v', 1, long)
	247	#define FS_IOC_SETVERSION _IOW('v', 2, long)
	248	#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
	249	#define FS_IOC32_GETFLAGS _IOR('f', 1, int)
	250	#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
	251	#define FS_IOC32_GETVERSION _IOR('v', 1, int)
	252	#define FS_IOC32_SETVERSION _IOW('v', 2, int)
334e580a DC	253	#define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr)
334e580a DC	254	#define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr)
607ca46e	255
0b81d077 JK	256	/*
	257	* File system encryption support
	258	*/
	259	/* Policy provided via an ioctl on the topmost directory */
	260	#define FS_KEY_DESCRIPTOR_SIZE 8
	261
41d5319a TT	262	#define FS_POLICY_FLAGS_PAD_4 0x00
	263	#define FS_POLICY_FLAGS_PAD_8 0x01
	264	#define FS_POLICY_FLAGS_PAD_16 0x02
	265	#define FS_POLICY_FLAGS_PAD_32 0x03
	266	#define FS_POLICY_FLAGS_PAD_MASK 0x03
	267	#define FS_POLICY_FLAGS_VALID 0x03
	268
	269	/* Encryption algorithms */
	270	#define FS_ENCRYPTION_MODE_INVALID 0
	271	#define FS_ENCRYPTION_MODE_AES_256_XTS 1
	272	#define FS_ENCRYPTION_MODE_AES_256_GCM 2
	273	#define FS_ENCRYPTION_MODE_AES_256_CBC 3
	274	#define FS_ENCRYPTION_MODE_AES_256_CTS 4
	275
0b81d077 JK	276	struct fscrypt_policy {
	277	__u8 version;
	278	__u8 contents_encryption_mode;
	279	__u8 filenames_encryption_mode;
	280	__u8 flags;
	281	__u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE];
960e6994	282	};
0b81d077 JK	283
	284	#define FS_IOC_SET_ENCRYPTION_POLICY _IOR('f', 19, struct fscrypt_policy)
	285	#define FS_IOC_GET_ENCRYPTION_PWSALT _IOW('f', 20, __u8[16])
	286	#define FS_IOC_GET_ENCRYPTION_POLICY _IOW('f', 21, struct fscrypt_policy)
	287
9c8268de JR	288	/* Parameters for passing an encryption key into the kernel keyring */
	289	#define FS_KEY_DESC_PREFIX "fscrypt:"
	290	#define FS_KEY_DESC_PREFIX_SIZE 8
	291
	292	/* Structure that userspace passes to the kernel keyring */
	293	#define FS_MAX_KEY_SIZE 64
	294
	295	struct fscrypt_key {
	296	__u32 mode;
	297	__u8 raw[FS_MAX_KEY_SIZE];
	298	__u32 size;
	299	};
	300
607ca46e DH	301	/*
607ca46e DH	302	* Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
68ce7bfc TT	303	*
	304	* Note: for historical reasons, these flags were originally used and
	305	* defined for use by ext2/ext3, and then other file systems started
	306	* using these flags so they wouldn't need to write their own version
	307	* of chattr/lsattr (which was shipped as part of e2fsprogs). You
	308	* should think twice before trying to use these flags in new
	309	* contexts, or trying to assign these flags, since they are used both
	310	* as the UAPI and the on-disk encoding for ext2/3/4. Also, we are
	311	* almost out of 32-bit flags. :-)
	312	*
	313	* We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from
	314	* XFS to the generic FS level interface. This uses a structure that
	315	* has padding and hence has more room to grow, so it may be more
	316	* appropriate for many new use cases.
	317	*
	318	* Please do not change these flags or interfaces before checking with
	319	* linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org.
607ca46e DH	320	*/
	321	#define FS_SECRM_FL 0x00000001 /* Secure deletion */
	322	#define FS_UNRM_FL 0x00000002 /* Undelete */
	323	#define FS_COMPR_FL 0x00000004 /* Compress file */
	324	#define FS_SYNC_FL 0x00000008 /* Synchronous updates */
	325	#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
	326	#define FS_APPEND_FL 0x00000020 /* writes to file may only append */
	327	#define FS_NODUMP_FL 0x00000040 /* do not dump file */
	328	#define FS_NOATIME_FL 0x00000080 /* do not update atime */
	329	/* Reserved for compression usage... */
	330	#define FS_DIRTY_FL 0x00000100
	331	#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
	332	#define FS_NOCOMP_FL 0x00000400 /* Don't compress */
607ca46e	333	/* End compression flags --- maybe not all used */
68ce7bfc	334	#define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */
607ca46e DH	335	#define FS_BTREE_FL 0x00001000 /* btree format dir */
	336	#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */
	337	#define FS_IMAGIC_FL 0x00002000 /* AFS directory */
	338	#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
	339	#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
	340	#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
	341	#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
68ce7bfc	342	#define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */
607ca46e	343	#define FS_EXTENT_FL 0x00080000 /* Extents */
68ce7bfc TT	344	#define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */
68ce7bfc TT	345	#define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */
607ca46e	346	#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
68ce7bfc	347	#define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */
8b4953e1	348	#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
607ca46e DH	349	#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
	350
	351	#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
	352	#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
	353
	354
	355	#define SYNC_FILE_RANGE_WAIT_BEFORE 1
	356	#define SYNC_FILE_RANGE_WRITE 2
	357	#define SYNC_FILE_RANGE_WAIT_AFTER 4
	358
97be7ebe CH	359	/* flags for preadv2/pwritev2: */
97be7ebe CH	360	#define RWF_HIPRI 0x00000001 /* high priority request, poll if possible */
e864f395 CH	361	#define RWF_DSYNC 0x00000002 /* per-IO O_DSYNC */
e864f395 CH	362	#define RWF_SYNC 0x00000004 /* per-IO O_SYNC */
97be7ebe	363
fdd2f5b7 GR	364	#define RWF_SUPPORTED (RWF_HIPRI \| RWF_DSYNC \| RWF_SYNC)
fdd2f5b7 GR	365
607ca46e	366	#endif /* _UAPI_LINUX_FS_H */