[mirror_ubuntu-disco-kernel.git] / include / uapi / linux / fs.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#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>

/* Use of MS_* flags within the kernel is restricted to core mount(2) code. */
#if !defined(__KERNEL__)
#include <linux/mount.h>
#endif

/*
 * 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 */

/*
 * 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 FSLABEL_MAX 256	/* Max chars for the interface; each fs may differ */

#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)
#define FS_IOC_GETFSLABEL		_IOR(0x94, 49, char[FSLABEL_MAX])
#define FS_IOC_SETFSLABEL		_IOW(0x94, 50, char[FSLABEL_MAX])

/*
 * 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_FLAG_DIRECT_KEY	0x04	/* use master key directly */
#define FS_POLICY_FLAGS_VALID		0x07

/* 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
#define FS_ENCRYPTION_MODE_AES_128_CBC		5
#define FS_ENCRYPTION_MODE_AES_128_CTS		6
#define FS_ENCRYPTION_MODE_SPECK128_256_XTS	7 /* Removed, do not use. */
#define FS_ENCRYPTION_MODE_SPECK128_256_CTS	8 /* Removed, do not use. */
#define FS_ENCRYPTION_MODE_ADIANTUM		9

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:
 */

typedef int __bitwise __kernel_rwf_t;

/* high priority request, poll if possible */
#define RWF_HIPRI	((__force __kernel_rwf_t)0x00000001)

/* per-IO O_DSYNC */
#define RWF_DSYNC	((__force __kernel_rwf_t)0x00000002)

/* per-IO O_SYNC */
#define RWF_SYNC	((__force __kernel_rwf_t)0x00000004)

/* per-IO, return -EAGAIN if operation would block */
#define RWF_NOWAIT	((__force __kernel_rwf_t)0x00000008)

/* per-IO O_APPEND */
#define RWF_APPEND	((__force __kernel_rwf_t)0x00000010)

/* mask of flags supported by the kernel */
#define RWF_SUPPORTED	(RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT |\
			 RWF_APPEND)

#endif /* _UAPI_LINUX_FS_H */
Commit	Line	Data
6f52b16c	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
607ca46e DH	2	#ifndef _UAPI_LINUX_FS_H
	3	#define _UAPI_LINUX_FS_H
	4
	5	/*
68ce7bfc TT	6	* This file has definitions for some important file table structures
	7	* and constants and structures used by various generic file system
	8	* ioctl's. Please do not make any changes in this file before
	9	* sending patches for review to linux-fsdevel@vger.kernel.org and
	10	* linux-api@vger.kernel.org.
607ca46e DH	11	*/
	12
	13	#include <linux/limits.h>
	14	#include <linux/ioctl.h>
	15	#include <linux/types.h>
	16
e262e32d DH	17	/* Use of MS_* flags within the kernel is restricted to core mount(2) code. */
	18	#if !defined(__KERNEL__)
	19	#include <linux/mount.h>
	20	#endif
	21
607ca46e DH	22	/*
	23	* It's silly to have NR_OPEN bigger than NR_FILE, but you can change
	24	* the file limit at runtime and only root can increase the per-process
	25	* nr_file rlimit, so it's safe to set up a ridiculously high absolute
	26	* upper limit on files-per-process.
	27	*
	28	* Some programs (notably those using select()) may have to be
	29	* recompiled to take full advantage of the new limits..
	30	*/
	31
	32	/* Fixed constants first: */
	33	#undef NR_OPEN
	34	#define INR_OPEN_CUR 1024 /* Initial setting for nfile rlimits */
	35	#define INR_OPEN_MAX 4096 /* Hard limit for nfile rlimits */
	36
	37	#define BLOCK_SIZE_BITS 10
	38	#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
	39
	40	#define SEEK_SET 0 /* seek relative to beginning of file */
	41	#define SEEK_CUR 1 /* seek relative to current file position */
	42	#define SEEK_END 2 /* seek relative to end of file */
	43	#define SEEK_DATA 3 /* seek to the next data */
	44	#define SEEK_HOLE 4 /* seek to the next hole */
	45	#define SEEK_MAX SEEK_HOLE
	46
0a7c3937	47	#define RENAME_NOREPLACE (1 << 0) /* Don't overwrite target */
da1ce067	48	#define RENAME_EXCHANGE (1 << 1) /* Exchange source and dest */
0d7a8555	49	#define RENAME_WHITEOUT (1 << 2) /* Whiteout source */
0a7c3937	50
04b38d60 CH	51	struct file_clone_range {
	52	__s64 src_fd;
	53	__u64 src_offset;
	54	__u64 src_length;
	55	__u64 dest_offset;
	56	};
	57
607ca46e DH	58	struct fstrim_range {
	59	__u64 start;
	60	__u64 len;
	61	__u64 minlen;
	62	};
	63
54dbc151 DW	64	/* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */
	65	#define FILE_DEDUPE_RANGE_SAME 0
	66	#define FILE_DEDUPE_RANGE_DIFFERS 1
	67
	68	/* from struct btrfs_ioctl_file_extent_same_info */
	69	struct file_dedupe_range_info {
	70	__s64 dest_fd; /* in - destination file */
	71	__u64 dest_offset; /* in - start of extent in destination */
	72	__u64 bytes_deduped; /* out - total # of bytes we were able
	73	* to dedupe from this file. */
	74	/* status of this dedupe operation:
	75	* < 0 for error
	76	* == FILE_DEDUPE_RANGE_SAME if dedupe succeeds
	77	* == FILE_DEDUPE_RANGE_DIFFERS if data differs
	78	*/
	79	__s32 status; /* out - see above description */
	80	__u32 reserved; /* must be zero */
	81	};
	82
	83	/* from struct btrfs_ioctl_file_extent_same_args */
	84	struct file_dedupe_range {
	85	__u64 src_offset; /* in - start of extent in source */
	86	__u64 src_length; /* in - length of extent */
	87	__u16 dest_count; /* in - total elements in info array */
	88	__u16 reserved1; /* must be zero */
	89	__u32 reserved2; /* must be zero */
	90	struct file_dedupe_range_info info[0];
	91	};
	92
607ca46e DH	93	/* And dynamically-tunable limits and defaults: */
	94	struct files_stat_struct {
	95	unsigned long nr_files; /* read only */
	96	unsigned long nr_free_files; /* read only */
	97	unsigned long max_files; /* tunable */
	98	};
	99
	100	struct inodes_stat_t {
3942c07c GC	101	long nr_inodes;
	102	long nr_unused;
	103	long dummy[5]; /* padding for sysctl ABI compatibility */
607ca46e DH	104	};
	105
	106
	107	#define NR_FILE 8192 /* this can well be larger on a larger system */
	108
334e580a DC	109	/*
	110	* Structure for FS_IOC_FSGETXATTR[A] and FS_IOC_FSSETXATTR.
	111	*/
	112	struct fsxattr {
	113	__u32 fsx_xflags; /* xflags field value (get/set) */
	114	__u32 fsx_extsize; /* extsize field value (get/set)*/
	115	__u32 fsx_nextents; /* nextents field value (get) */
	116	__u32 fsx_projid; /* project identifier (get/set) */
0a6eab8b DW	117	__u32 fsx_cowextsize; /* CoW extsize field value (get/set)*/
0a6eab8b DW	118	unsigned char fsx_pad[8];
334e580a DC	119	};
	120
	121	/*
	122	* Flags for the fsx_xflags field
	123	*/
	124	#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */
	125	#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */
	126	#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */
	127	#define FS_XFLAG_APPEND 0x00000010 /* all writes append */
	128	#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */
	129	#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */
	130	#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */
	131	#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */
	132	#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */
	133	#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */
	134	#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */
	135	#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
	136	#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
	137	#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
58f88ca2	138	#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
0a6eab8b	139	#define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */
334e580a DC	140	#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
334e580a DC	141
607ca46e DH	142	/* the read-only stuff doesn't really belong here, but any other place is
	143	probably as bad and I don't want to create yet another include file. */
	144
	145	#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
	146	#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
	147	#define BLKRRPART _IO(0x12,95) /* re-read partition table */
	148	#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long arg) /
	149	#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
	150	#define BLKRASET _IO(0x12,98) /* set read ahead for block device */
	151	#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
	152	#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
	153	#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
	154	#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
	155	#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
	156	#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
	157	#if 0
	158	#define BLKPG _IO(0x12,105)/* See blkpg.h */
	159
	160	/* Some people are morons. Do not use sizeof! */
	161
	162	#define BLKELVGET _IOR(0x12,106,size_t)/* elevator get */
	163	#define BLKELVSET _IOW(0x12,107,size_t)/* elevator set */
	164	/* This was here just to show that the number is taken -
	165	probably all these _IO(0x12,) ioctls should be moved to blkpg.h. /
	166	#endif
	167	/* A jump here: 108-111 have been used for various private purposes. */
	168	#define BLKBSZGET _IOR(0x12,112,size_t)
	169	#define BLKBSZSET _IOW(0x12,113,size_t)
	170	#define BLKGETSIZE64 _IOR(0x12,114,size_t) /* return device size in bytes (u64 arg) /
	171	#define BLKTRACESETUP _IOWR(0x12,115,struct blk_user_trace_setup)
	172	#define BLKTRACESTART _IO(0x12,116)
	173	#define BLKTRACESTOP _IO(0x12,117)
	174	#define BLKTRACETEARDOWN _IO(0x12,118)
	175	#define BLKDISCARD _IO(0x12,119)
	176	#define BLKIOMIN _IO(0x12,120)
	177	#define BLKIOOPT _IO(0x12,121)
	178	#define BLKALIGNOFF _IO(0x12,122)
	179	#define BLKPBSZGET _IO(0x12,123)
	180	#define BLKDISCARDZEROES _IO(0x12,124)
	181	#define BLKSECDISCARD _IO(0x12,125)
	182	#define BLKROTATIONAL _IO(0x12,126)
	183	#define BLKZEROOUT _IO(0x12,127)
3ed05a98 ST	184	/*
	185	* A jump here: 130-131 are reserved for zoned block devices
	186	* (see uapi/linux/blkzoned.h)
	187	*/
607ca46e DH	188
	189	#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
	190	#define FIBMAP _IO(0x00,1) /* bmap access */
	191	#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
	192	#define FIFREEZE _IOWR('X', 119, int) /* Freeze */
	193	#define FITHAW _IOWR('X', 120, int) /* Thaw */
	194	#define FITRIM _IOWR('X', 121, struct fstrim_range) /* Trim */
04b38d60 CH	195	#define FICLONE _IOW(0x94, 9, int)
04b38d60 CH	196	#define FICLONERANGE _IOW(0x94, 13, struct file_clone_range)
54dbc151	197	#define FIDEDUPERANGE _IOWR(0x94, 54, struct file_dedupe_range)
607ca46e	198
62750d04 ES	199	#define FSLABEL_MAX 256 /* Max chars for the interface; each fs may differ */
62750d04 ES	200
607ca46e DH	201	#define FS_IOC_GETFLAGS _IOR('f', 1, long)
	202	#define FS_IOC_SETFLAGS _IOW('f', 2, long)
	203	#define FS_IOC_GETVERSION _IOR('v', 1, long)
	204	#define FS_IOC_SETVERSION _IOW('v', 2, long)
	205	#define FS_IOC_FIEMAP _IOWR('f', 11, struct fiemap)
	206	#define FS_IOC32_GETFLAGS _IOR('f', 1, int)
	207	#define FS_IOC32_SETFLAGS _IOW('f', 2, int)
	208	#define FS_IOC32_GETVERSION _IOR('v', 1, int)
	209	#define FS_IOC32_SETVERSION _IOW('v', 2, int)
62750d04 ES	210	#define FS_IOC_FSGETXATTR _IOR('X', 31, struct fsxattr)
	211	#define FS_IOC_FSSETXATTR _IOW('X', 32, struct fsxattr)
	212	#define FS_IOC_GETFSLABEL _IOR(0x94, 49, char[FSLABEL_MAX])
	213	#define FS_IOC_SETFSLABEL _IOW(0x94, 50, char[FSLABEL_MAX])
607ca46e	214
0b81d077 JK	215	/*
	216	* File system encryption support
	217	*/
	218	/* Policy provided via an ioctl on the topmost directory */
	219	#define FS_KEY_DESCRIPTOR_SIZE 8
	220
41d5319a TT	221	#define FS_POLICY_FLAGS_PAD_4 0x00
	222	#define FS_POLICY_FLAGS_PAD_8 0x01
	223	#define FS_POLICY_FLAGS_PAD_16 0x02
	224	#define FS_POLICY_FLAGS_PAD_32 0x03
	225	#define FS_POLICY_FLAGS_PAD_MASK 0x03
8094c3ce EB	226	#define FS_POLICY_FLAG_DIRECT_KEY 0x04 /* use master key directly */
8094c3ce EB	227	#define FS_POLICY_FLAGS_VALID 0x07
41d5319a TT	228
	229	/* Encryption algorithms */
	230	#define FS_ENCRYPTION_MODE_INVALID 0
	231	#define FS_ENCRYPTION_MODE_AES_256_XTS 1
	232	#define FS_ENCRYPTION_MODE_AES_256_GCM 2
	233	#define FS_ENCRYPTION_MODE_AES_256_CBC 3
	234	#define FS_ENCRYPTION_MODE_AES_256_CTS 4
b7e7cf7a DW	235	#define FS_ENCRYPTION_MODE_AES_128_CBC 5
b7e7cf7a DW	236	#define FS_ENCRYPTION_MODE_AES_128_CTS 6
578bdaab JD	237	#define FS_ENCRYPTION_MODE_SPECK128_256_XTS 7 /* Removed, do not use. */
578bdaab JD	238	#define FS_ENCRYPTION_MODE_SPECK128_256_CTS 8 /* Removed, do not use. */
8094c3ce	239	#define FS_ENCRYPTION_MODE_ADIANTUM 9
41d5319a	240
0b81d077 JK	241	struct fscrypt_policy {
	242	__u8 version;
	243	__u8 contents_encryption_mode;
	244	__u8 filenames_encryption_mode;
	245	__u8 flags;
	246	__u8 master_key_descriptor[FS_KEY_DESCRIPTOR_SIZE];
960e6994	247	};
0b81d077 JK	248
	249	#define FS_IOC_SET_ENCRYPTION_POLICY _IOR('f', 19, struct fscrypt_policy)
	250	#define FS_IOC_GET_ENCRYPTION_PWSALT _IOW('f', 20, __u8[16])
	251	#define FS_IOC_GET_ENCRYPTION_POLICY _IOW('f', 21, struct fscrypt_policy)
	252
9c8268de JR	253	/* Parameters for passing an encryption key into the kernel keyring */
	254	#define FS_KEY_DESC_PREFIX "fscrypt:"
	255	#define FS_KEY_DESC_PREFIX_SIZE 8
	256
	257	/* Structure that userspace passes to the kernel keyring */
	258	#define FS_MAX_KEY_SIZE 64
	259
	260	struct fscrypt_key {
	261	__u32 mode;
	262	__u8 raw[FS_MAX_KEY_SIZE];
	263	__u32 size;
	264	};
	265
607ca46e DH	266	/*
607ca46e DH	267	* Inode flags (FS_IOC_GETFLAGS / FS_IOC_SETFLAGS)
68ce7bfc TT	268	*
	269	* Note: for historical reasons, these flags were originally used and
	270	* defined for use by ext2/ext3, and then other file systems started
	271	* using these flags so they wouldn't need to write their own version
	272	* of chattr/lsattr (which was shipped as part of e2fsprogs). You
	273	* should think twice before trying to use these flags in new
	274	* contexts, or trying to assign these flags, since they are used both
	275	* as the UAPI and the on-disk encoding for ext2/3/4. Also, we are
	276	* almost out of 32-bit flags. :-)
	277	*
	278	* We have recently hoisted FS_IOC_FSGETXATTR / FS_IOC_FSSETXATTR from
	279	* XFS to the generic FS level interface. This uses a structure that
	280	* has padding and hence has more room to grow, so it may be more
	281	* appropriate for many new use cases.
	282	*
	283	* Please do not change these flags or interfaces before checking with
	284	* linux-fsdevel@vger.kernel.org and linux-api@vger.kernel.org.
607ca46e DH	285	*/
	286	#define FS_SECRM_FL 0x00000001 /* Secure deletion */
	287	#define FS_UNRM_FL 0x00000002 /* Undelete */
	288	#define FS_COMPR_FL 0x00000004 /* Compress file */
	289	#define FS_SYNC_FL 0x00000008 /* Synchronous updates */
	290	#define FS_IMMUTABLE_FL 0x00000010 /* Immutable file */
	291	#define FS_APPEND_FL 0x00000020 /* writes to file may only append */
	292	#define FS_NODUMP_FL 0x00000040 /* do not dump file */
	293	#define FS_NOATIME_FL 0x00000080 /* do not update atime */
	294	/* Reserved for compression usage... */
	295	#define FS_DIRTY_FL 0x00000100
	296	#define FS_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
	297	#define FS_NOCOMP_FL 0x00000400 /* Don't compress */
607ca46e	298	/* End compression flags --- maybe not all used */
68ce7bfc	299	#define FS_ENCRYPT_FL 0x00000800 /* Encrypted file */
607ca46e DH	300	#define FS_BTREE_FL 0x00001000 /* btree format dir */
	301	#define FS_INDEX_FL 0x00001000 /* hash-indexed directory */
	302	#define FS_IMAGIC_FL 0x00002000 /* AFS directory */
	303	#define FS_JOURNAL_DATA_FL 0x00004000 /* Reserved for ext3 */
	304	#define FS_NOTAIL_FL 0x00008000 /* file tail should not be merged */
	305	#define FS_DIRSYNC_FL 0x00010000 /* dirsync behaviour (directories only) */
	306	#define FS_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/
68ce7bfc	307	#define FS_HUGE_FILE_FL 0x00040000 /* Reserved for ext4 */
607ca46e	308	#define FS_EXTENT_FL 0x00080000 /* Extents */
68ce7bfc TT	309	#define FS_EA_INODE_FL 0x00200000 /* Inode used for large EA */
68ce7bfc TT	310	#define FS_EOFBLOCKS_FL 0x00400000 /* Reserved for ext4 */
607ca46e	311	#define FS_NOCOW_FL 0x00800000 /* Do not cow file */
68ce7bfc	312	#define FS_INLINE_DATA_FL 0x10000000 /* Reserved for ext4 */
8b4953e1	313	#define FS_PROJINHERIT_FL 0x20000000 /* Create with parents projid */
607ca46e DH	314	#define FS_RESERVED_FL 0x80000000 /* reserved for ext2 lib */
	315
	316	#define FS_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */
	317	#define FS_FL_USER_MODIFIABLE 0x000380FF /* User modifiable flags */
	318
	319
	320	#define SYNC_FILE_RANGE_WAIT_BEFORE 1
	321	#define SYNC_FILE_RANGE_WRITE 2
	322	#define SYNC_FILE_RANGE_WAIT_AFTER 4
	323
ddef7ed2 CH	324	/*
	325	* Flags for preadv2/pwritev2:
	326	*/
	327
	328	typedef int __bitwise __kernel_rwf_t;
	329
	330	/* high priority request, poll if possible */
	331	#define RWF_HIPRI ((__force __kernel_rwf_t)0x00000001)
	332
	333	/* per-IO O_DSYNC */
	334	#define RWF_DSYNC ((__force __kernel_rwf_t)0x00000002)
	335
	336	/* per-IO O_SYNC */
	337	#define RWF_SYNC ((__force __kernel_rwf_t)0x00000004)
	338
	339	/* per-IO, return -EAGAIN if operation would block */
	340	#define RWF_NOWAIT ((__force __kernel_rwf_t)0x00000008)
	341
e1fc742e JB	342	/* per-IO O_APPEND */
	343	#define RWF_APPEND ((__force __kernel_rwf_t)0x00000010)
	344
ddef7ed2	345	/* mask of flags supported by the kernel */
e1fc742e JB	346	#define RWF_SUPPORTED (RWF_HIPRI \| RWF_DSYNC \| RWF_SYNC \| RWF_NOWAIT \|\
e1fc742e JB	347	RWF_APPEND)
fdd2f5b7	348
607ca46e	349	#endif /* _UAPI_LINUX_FS_H */