[thirdparty/xfsprogs-dev.git] / include / linux.h

// SPDX-License-Identifier: LGPL-2.1
/*
 * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
 */
#ifndef __XFS_LINUX_H__
#define __XFS_LINUX_H__

#include <uuid/uuid.h>
#include <sys/vfs.h>
#include <sys/ioctl.h>
#include <sys/param.h>
#include <sys/sysmacros.h>
#include <sys/stat.h>
#include <inttypes.h>
#include <malloc.h>
#include <getopt.h>
#include <errno.h>
#include <endian.h>
#include <stdbool.h>
#include <stdio.h>
#include <asm/types.h>
#include <mntent.h>
#ifdef OVERRIDE_SYSTEM_FSXATTR
# define fsxattr sys_fsxattr
#endif
#include <linux/fs.h> /* fsxattr defintion for new kernels */
#ifdef OVERRIDE_SYSTEM_FSXATTR
# undef fsxattr
#endif

static __inline__ int xfsctl(const char *path, int fd, int cmd, void *p)
{
	return ioctl(fd, cmd, p);
}

/*
 * platform_test_xfs_*() implies that xfsctl will succeed on the file;
 * on Linux, at least, special files don't get xfs file ops,
 * so return 0 for those
 */

static __inline__ int platform_test_xfs_fd(int fd)
{
	struct statfs statfsbuf;
	struct stat statbuf;

	if (fstatfs(fd, &statfsbuf) < 0)
		return 0;
	if (fstat(fd, &statbuf) < 0)
		return 0;
	if (!S_ISREG(statbuf.st_mode) && !S_ISDIR(statbuf.st_mode))
		return 0;
	return (statfsbuf.f_type == 0x58465342);	/* XFSB */
}

static __inline__ int platform_test_xfs_path(const char *path)
{
	struct statfs statfsbuf;
	struct stat statbuf;

	if (statfs(path, &statfsbuf) < 0)
		return 0;
	if (stat(path, &statbuf) < 0)
		return 0;
	if (!S_ISREG(statbuf.st_mode) && !S_ISDIR(statbuf.st_mode))
		return 0;
	return (statfsbuf.f_type == 0x58465342);	/* XFSB */
}

static __inline__ int platform_fstatfs(int fd, struct statfs *buf)
{
	return fstatfs(fd, buf);
}

static __inline__ void platform_getoptreset(void)
{
	extern int optind;
	optind = 0;
}

static __inline__ int platform_uuid_compare(uuid_t *uu1, uuid_t *uu2)
{
	return uuid_compare(*uu1, *uu2);
}

static __inline__ void platform_uuid_unparse(uuid_t *uu, char *buffer)
{
	uuid_unparse(*uu, buffer);
}

static __inline__ int platform_uuid_parse(char *buffer, uuid_t *uu)
{
	return uuid_parse(buffer, *uu);
}

static __inline__ int platform_uuid_is_null(uuid_t *uu)
{
	return uuid_is_null(*uu);
}

static __inline__ void platform_uuid_generate(uuid_t *uu)
{
	uuid_generate(*uu);
}

static __inline__ void platform_uuid_clear(uuid_t *uu)
{
	uuid_clear(*uu);
}

static __inline__ void platform_uuid_copy(uuid_t *dst, uuid_t *src)
{
	uuid_copy(*dst, *src);
}

#ifndef BLKDISCARD
#define BLKDISCARD	_IO(0x12,119)
#endif

static __inline__ int
platform_discard_blocks(int fd, uint64_t start, uint64_t len)
{
	uint64_t range[2] = { start, len };

	if (ioctl(fd, BLKDISCARD, &range) < 0)
		return errno;
	return 0;
}

#define ENOATTR		ENODATA	/* Attribute not found */
#define EFSCORRUPTED	EUCLEAN	/* Filesystem is corrupted */
#define EFSBADCRC	EBADMSG	/* Bad CRC detected */

typedef off_t		xfs_off_t;
typedef uint64_t	xfs_ino_t;
typedef uint32_t	xfs_dev_t;
typedef int64_t		xfs_daddr_t;
typedef __u32		xfs_nlink_t;

/**
 * Abstraction of mountpoints.
 */
struct mntent_cursor {
	FILE *mtabp;
};

static inline int platform_mntent_open(struct mntent_cursor * cursor, char *mtab)
{
	cursor->mtabp = setmntent(mtab, "r");
	if (!cursor->mtabp) {
		fprintf(stderr, "Error: cannot read %s\n", mtab);
		return 1;
	}
	return 0;
}

static inline struct mntent * platform_mntent_next(struct mntent_cursor * cursor)
{
	return getmntent(cursor->mtabp);
}

static inline void platform_mntent_close(struct mntent_cursor * cursor)
{
	endmntent(cursor->mtabp);
}

/*
 * Check whether we have to define FS_IOC_FS[GS]ETXATTR ourselves. These
 * are a copy of the definitions moved to linux/uapi/fs.h in the 4.5 kernel,
 * so this is purely for supporting builds against old kernel headers.
 */
#if !defined FS_IOC_FSGETXATTR || defined OVERRIDE_SYSTEM_FSXATTR
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];
};
#endif

#ifndef FS_IOC_FSGETXATTR
/*
 * 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_HASATTR	0x80000000	/* no DIFLAG for this	*/

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

#endif

#ifndef FS_XFLAG_COWEXTSIZE
#define FS_XFLAG_COWEXTSIZE	0x00010000	/* CoW extent size allocator hint */
#endif

#ifdef HAVE_GETFSMAP
# include <linux/fsmap.h>
#else
/*
 *	Structure for FS_IOC_GETFSMAP.
 *
 *	The memory layout for this call are the scalar values defined in
 *	struct fsmap_head, followed by two struct fsmap that describe
 *	the lower and upper bound of mappings to return, followed by an
 *	array of struct fsmap mappings.
 *
 *	fmh_iflags control the output of the call, whereas fmh_oflags report
 *	on the overall record output.  fmh_count should be set to the
 *	length of the fmh_recs array, and fmh_entries will be set to the
 *	number of entries filled out during each call.  If fmh_count is
 *	zero, the number of reverse mappings will be returned in
 *	fmh_entries, though no mappings will be returned.  fmh_reserved
 *	must be set to zero.
 *
 *	The two elements in the fmh_keys array are used to constrain the
 *	output.  The first element in the array should represent the
 *	lowest disk mapping ("low key") that the user wants to learn
 *	about.  If this value is all zeroes, the filesystem will return
 *	the first entry it knows about.  For a subsequent call, the
 *	contents of fsmap_head.fmh_recs[fsmap_head.fmh_count - 1] should be
 *	copied into fmh_keys[0] to have the kernel start where it left off.
 *
 *	The second element in the fmh_keys array should represent the
 *	highest disk mapping ("high key") that the user wants to learn
 *	about.  If this value is all ones, the filesystem will not stop
 *	until it runs out of mapping to return or runs out of space in
 *	fmh_recs.
 *
 *	fmr_device can be either a 32-bit cookie representing a device, or
 *	a 32-bit dev_t if the FMH_OF_DEV_T flag is set.  fmr_physical,
 *	fmr_offset, and fmr_length are expressed in units of bytes.
 *	fmr_owner is either an inode number, or a special value if
 *	FMR_OF_SPECIAL_OWNER is set in fmr_flags.
 */
struct fsmap {
	__u32		fmr_device;	/* device id */
	__u32		fmr_flags;	/* mapping flags */
	__u64		fmr_physical;	/* device offset of segment */
	__u64		fmr_owner;	/* owner id */
	__u64		fmr_offset;	/* file offset of segment */
	__u64		fmr_length;	/* length of segment */
	__u64		fmr_reserved[3];	/* must be zero */
};

struct fsmap_head {
	__u32		fmh_iflags;	/* control flags */
	__u32		fmh_oflags;	/* output flags */
	__u32		fmh_count;	/* # of entries in array incl. input */
	__u32		fmh_entries;	/* # of entries filled in (output). */
	__u64		fmh_reserved[6];	/* must be zero */

	struct fsmap	fmh_keys[2];	/* low and high keys for the mapping search */
	struct fsmap	fmh_recs[];	/* returned records */
};

/* Size of an fsmap_head with room for nr records. */
static inline size_t
fsmap_sizeof(
	unsigned int	nr)
{
	return sizeof(struct fsmap_head) + nr * sizeof(struct fsmap);
}

/* Start the next fsmap query at the end of the current query results. */
static inline void
fsmap_advance(
	struct fsmap_head	*head)
{
	head->fmh_keys[0] = head->fmh_recs[head->fmh_entries - 1];
}

/*	fmh_iflags values - set by XFS_IOC_GETFSMAP caller in the header. */
/* no flags defined yet */
#define FMH_IF_VALID		0

/*	fmh_oflags values - returned in the header segment only. */
#define FMH_OF_DEV_T		0x1	/* fmr_device values will be dev_t */

/*	fmr_flags values - returned for each non-header segment */
#define FMR_OF_PREALLOC		0x1	/* segment = unwritten pre-allocation */
#define FMR_OF_ATTR_FORK	0x2	/* segment = attribute fork */
#define FMR_OF_EXTENT_MAP	0x4	/* segment = extent map */
#define FMR_OF_SHARED		0x8	/* segment = shared with another file */
#define FMR_OF_SPECIAL_OWNER	0x10	/* owner is a special value */
#define FMR_OF_LAST		0x20	/* segment is the last in the FS */

/* Each FS gets to define its own special owner codes. */
#define FMR_OWNER(type, code)	(((__u64)type << 32) | \
				 ((__u64)code & 0xFFFFFFFFULL))
#define FMR_OWNER_TYPE(owner)	((__u32)((__u64)owner >> 32))
#define FMR_OWNER_CODE(owner)	((__u32)(((__u64)owner & 0xFFFFFFFFULL)))
#define FMR_OWN_FREE		FMR_OWNER(0, 1) /* free space */
#define FMR_OWN_UNKNOWN		FMR_OWNER(0, 2) /* unknown owner */
#define FMR_OWN_METADATA	FMR_OWNER(0, 3) /* metadata */

#define FS_IOC_GETFSMAP		_IOWR('X', 59, struct fsmap_head)

#define HAVE_GETFSMAP
#endif /* HAVE_GETFSMAP */

#ifndef HAVE_MAP_SYNC
#define MAP_SYNC 0
#define MAP_SHARED_VALIDATE 0
#else
#include <asm-generic/mman.h>
#include <asm-generic/mman-common.h>
#endif /* HAVE_MAP_SYNC */

#endif	/* __XFS_LINUX_H__ */
Commit	Line	Data
959ef981	1	// SPDX-License-Identifier: LGPL-2.1
c0211f67	2	/*
f302e9e4	3	* Copyright (c) 2004-2005 Silicon Graphics, Inc. All Rights Reserved.
c0211f67 NS	4	*/
	5	#ifndef __XFS_LINUX_H__
	6	#define __XFS_LINUX_H__
	7
	8	#include <uuid/uuid.h>
	9	#include <sys/vfs.h>
	10	#include <sys/ioctl.h>
	11	#include <sys/param.h>
25d246df	12	#include <sys/sysmacros.h>
66210ef2	13	#include <sys/stat.h>
5d1b7f0f	14	#include <inttypes.h>
c0211f67 NS	15	#include <malloc.h>
c0211f67 NS	16	#include <getopt.h>
dcabd4e7	17	#include <errno.h>
c0211f67	18	#include <endian.h>
a2ceac1f	19	#include <stdbool.h>
7c66b2fd	20	#include <stdio.h>
24842c5c	21	#include <asm/types.h>
7141fc5b	22	#include <mntent.h>
6529e656 DW	23	#ifdef OVERRIDE_SYSTEM_FSXATTR
	24	# define fsxattr sys_fsxattr
	25	#endif
2be9e939	26	#include <linux/fs.h> /* fsxattr defintion for new kernels */
6529e656 DW	27	#ifdef OVERRIDE_SYSTEM_FSXATTR
	28	# undef fsxattr
	29	#endif
c0211f67 NS	30
	31	static __inline__ int xfsctl(const char path, int fd, int cmd, void p)
	32	{
	33	return ioctl(fd, cmd, p);
	34	}
	35
fcd6fa7f ES	36	/*
	37	* platform_test_xfs_*() implies that xfsctl will succeed on the file;
	38	* on Linux, at least, special files don't get xfs file ops,
	39	* so return 0 for those
	40	*/
	41
c0211f67 NS	42	static __inline__ int platform_test_xfs_fd(int fd)
c0211f67 NS	43	{
fcd6fa7f ES	44	struct statfs statfsbuf;
	45	struct stat statbuf;
	46
	47	if (fstatfs(fd, &statfsbuf) < 0)
	48	return 0;
	49	if (fstat(fd, &statbuf) < 0)
c0211f67	50	return 0;
fcd6fa7f ES	51	if (!S_ISREG(statbuf.st_mode) && !S_ISDIR(statbuf.st_mode))
	52	return 0;
	53	return (statfsbuf.f_type == 0x58465342); /* XFSB */
c0211f67 NS	54	}
	55
	56	static __inline__ int platform_test_xfs_path(const char *path)
	57	{
fcd6fa7f ES	58	struct statfs statfsbuf;
	59	struct stat statbuf;
	60
	61	if (statfs(path, &statfsbuf) < 0)
	62	return 0;
	63	if (stat(path, &statbuf) < 0)
	64	return 0;
	65	if (!S_ISREG(statbuf.st_mode) && !S_ISDIR(statbuf.st_mode))
c0211f67	66	return 0;
fcd6fa7f	67	return (statfsbuf.f_type == 0x58465342); /* XFSB */
c0211f67 NS	68	}
	69
	70	static __inline__ int platform_fstatfs(int fd, struct statfs *buf)
	71	{
	72	return fstatfs(fd, buf);
	73	}
	74
	75	static __inline__ void platform_getoptreset(void)
	76	{
	77	extern int optind;
	78	optind = 0;
	79	}
	80
1552a820 NS	81	static __inline__ int platform_uuid_compare(uuid_t uu1, uuid_t uu2)
	82	{
	83	return uuid_compare(uu1, uu2);
	84	}
	85
4d32d744	86	static __inline__ void platform_uuid_unparse(uuid_t uu, char buffer)
1552a820	87	{
4d32d744 NS	88	uuid_unparse(*uu, buffer);
	89	}
	90
	91	static __inline__ int platform_uuid_parse(char buffer, uuid_t uu)
	92	{
	93	return uuid_parse(buffer, *uu);
1552a820 NS	94	}
	95
	96	static __inline__ int platform_uuid_is_null(uuid_t *uu)
	97	{
	98	return uuid_is_null(*uu);
	99	}
c0211f67	100
4d32d744 NS	101	static __inline__ void platform_uuid_generate(uuid_t *uu)
	102	{
	103	uuid_generate(*uu);
	104	}
	105
	106	static __inline__ void platform_uuid_clear(uuid_t *uu)
	107	{
	108	uuid_clear(*uu);
	109	}
	110
	111	static __inline__ void platform_uuid_copy(uuid_t dst, uuid_t src)
	112	{
	113	uuid_copy(dst, src);
	114	}
	115
ad136b33 CH	116	#ifndef BLKDISCARD
	117	#define BLKDISCARD _IO(0x12,119)
	118	#endif
	119
	120	static __inline__ int
f96aff0c	121	platform_discard_blocks(int fd, uint64_t start, uint64_t len)
ad136b33	122	{
14f8b681	123	uint64_t range[2] = { start, len };
ad136b33 CH	124
	125	if (ioctl(fd, BLKDISCARD, &range) < 0)
	126	return errno;
	127	return 0;
	128	}
	129
c0211f67	130	#define ENOATTR ENODATA /* Attribute not found */
1552a820	131	#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
99c1ec96	132	#define EFSBADCRC EBADMSG /* Bad CRC detected */
c0211f67	133
65b4f302	134	typedef off_t xfs_off_t;
14f8b681 DW	135	typedef uint64_t xfs_ino_t;
	136	typedef uint32_t xfs_dev_t;
	137	typedef int64_t xfs_daddr_t;
d8079fe0	138	typedef __u32 xfs_nlink_t;
c0211f67	139
7141fc5b JT	140	/**
	141	* Abstraction of mountpoints.
	142	*/
	143	struct mntent_cursor {
	144	FILE *mtabp;
	145	};
	146
	147	static inline int platform_mntent_open(struct mntent_cursor * cursor, char *mtab)
	148	{
	149	cursor->mtabp = setmntent(mtab, "r");
	150	if (!cursor->mtabp) {
	151	fprintf(stderr, "Error: cannot read %s\n", mtab);
	152	return 1;
	153	}
	154	return 0;
	155	}
	156
	157	static inline struct mntent * platform_mntent_next(struct mntent_cursor * cursor)
	158	{
	159	return getmntent(cursor->mtabp);
	160	}
	161
	162	static inline void platform_mntent_close(struct mntent_cursor * cursor)
	163	{
	164	endmntent(cursor->mtabp);
	165	}
	166
83f4b5ac DC	167	/*
	168	* Check whether we have to define FS_IOC_FS[GS]ETXATTR ourselves. These
	169	* are a copy of the definitions moved to linux/uapi/fs.h in the 4.5 kernel,
	170	* so this is purely for supporting builds against old kernel headers.
	171	*/
6529e656	172	#if !defined FS_IOC_FSGETXATTR \|\| defined OVERRIDE_SYSTEM_FSXATTR
83f4b5ac DC	173	struct fsxattr {
	174	__u32 fsx_xflags; /* xflags field value (get/set) */
	175	__u32 fsx_extsize; /* extsize field value (get/set)*/
	176	__u32 fsx_nextents; /* nextents field value (get) */
	177	__u32 fsx_projid; /* project identifier (get/set) */
1bc58d93 DW	178	__u32 fsx_cowextsize; /* cow extsize field value (get/set) */
1bc58d93 DW	179	unsigned char fsx_pad[8];
83f4b5ac	180	};
6529e656	181	#endif
83f4b5ac	182
6529e656	183	#ifndef FS_IOC_FSGETXATTR
83f4b5ac DC	184	/*
	185	* Flags for the fsx_xflags field
	186	*/
	187	#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */
	188	#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */
	189	#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */
	190	#define FS_XFLAG_APPEND 0x00000010 /* all writes append */
	191	#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */
	192	#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */
	193	#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */
	194	#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */
	195	#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */
	196	#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */
	197	#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */
	198	#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
	199	#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
	200	#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
7093f633	201	#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
83f4b5ac DC	202	#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
	203
	204	#define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr)
	205	#define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr)
	206
	207	#endif
	208
1bc58d93 DW	209	#ifndef FS_XFLAG_COWEXTSIZE
	210	#define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */
	211	#endif
	212
6644005b DW	213	#ifdef HAVE_GETFSMAP
	214	# include <linux/fsmap.h>
	215	#else
71956d72 DW	216	/*
	217	* Structure for FS_IOC_GETFSMAP.
	218	*
	219	* The memory layout for this call are the scalar values defined in
	220	* struct fsmap_head, followed by two struct fsmap that describe
	221	* the lower and upper bound of mappings to return, followed by an
	222	* array of struct fsmap mappings.
	223	*
	224	* fmh_iflags control the output of the call, whereas fmh_oflags report
	225	* on the overall record output. fmh_count should be set to the
	226	* length of the fmh_recs array, and fmh_entries will be set to the
	227	* number of entries filled out during each call. If fmh_count is
	228	* zero, the number of reverse mappings will be returned in
	229	* fmh_entries, though no mappings will be returned. fmh_reserved
	230	* must be set to zero.
	231	*
	232	* The two elements in the fmh_keys array are used to constrain the
	233	* output. The first element in the array should represent the
	234	* lowest disk mapping ("low key") that the user wants to learn
	235	* about. If this value is all zeroes, the filesystem will return
	236	* the first entry it knows about. For a subsequent call, the
	237	* contents of fsmap_head.fmh_recs[fsmap_head.fmh_count - 1] should be
	238	* copied into fmh_keys[0] to have the kernel start where it left off.
	239	*
	240	* The second element in the fmh_keys array should represent the
	241	* highest disk mapping ("high key") that the user wants to learn
	242	* about. If this value is all ones, the filesystem will not stop
	243	* until it runs out of mapping to return or runs out of space in
	244	* fmh_recs.
	245	*
	246	* fmr_device can be either a 32-bit cookie representing a device, or
	247	* a 32-bit dev_t if the FMH_OF_DEV_T flag is set. fmr_physical,
	248	* fmr_offset, and fmr_length are expressed in units of bytes.
	249	* fmr_owner is either an inode number, or a special value if
	250	* FMR_OF_SPECIAL_OWNER is set in fmr_flags.
	251	*/
	252	struct fsmap {
	253	__u32 fmr_device; /* device id */
	254	__u32 fmr_flags; /* mapping flags */
	255	__u64 fmr_physical; /* device offset of segment */
	256	__u64 fmr_owner; /* owner id */
	257	__u64 fmr_offset; /* file offset of segment */
	258	__u64 fmr_length; /* length of segment */
	259	__u64 fmr_reserved[3]; /* must be zero */
	260	};
	261
	262	struct fsmap_head {
	263	__u32 fmh_iflags; /* control flags */
	264	__u32 fmh_oflags; /* output flags */
	265	__u32 fmh_count; /* # of entries in array incl. input */
	266	__u32 fmh_entries; /* # of entries filled in (output). */
	267	__u64 fmh_reserved[6]; /* must be zero */
	268
	269	struct fsmap fmh_keys[2]; /* low and high keys for the mapping search */
	270	struct fsmap fmh_recs[]; /* returned records */
	271	};
	272
	273	/* Size of an fsmap_head with room for nr records. */
	274	static inline size_t
	275	fsmap_sizeof(
	276	unsigned int nr)
	277	{
	278	return sizeof(struct fsmap_head) + nr * sizeof(struct fsmap);
	279	}
280
281	/* Start the next fsmap query at the end of the current query results. */
282	static inline void
283	fsmap_advance(
284	struct fsmap_head *head)
285	{
286	head->fmh_keys[0] = head->fmh_recs[head->fmh_entries - 1];
287	}
288
289	/* fmh_iflags values - set by XFS_IOC_GETFSMAP caller in the header. */
290	/* no flags defined yet */
291	#define FMH_IF_VALID 0
292
293	/* fmh_oflags values - returned in the header segment only. */
294	#define FMH_OF_DEV_T 0x1 /* fmr_device values will be dev_t */
295
296	/* fmr_flags values - returned for each non-header segment */
297	#define FMR_OF_PREALLOC 0x1 /* segment = unwritten pre-allocation */
298	#define FMR_OF_ATTR_FORK 0x2 /* segment = attribute fork */
299	#define FMR_OF_EXTENT_MAP 0x4 /* segment = extent map */
300	#define FMR_OF_SHARED 0x8 /* segment = shared with another file */
301	#define FMR_OF_SPECIAL_OWNER 0x10 /* owner is a special value */
302	#define FMR_OF_LAST 0x20 /* segment is the last in the FS */
303
304	/* Each FS gets to define its own special owner codes. */
305	#define FMR_OWNER(type, code) (((__u64)type << 32) \| \
306	((__u64)code & 0xFFFFFFFFULL))
307	#define FMR_OWNER_TYPE(owner) ((__u32)((__u64)owner >> 32))
308	#define FMR_OWNER_CODE(owner) ((__u32)(((__u64)owner & 0xFFFFFFFFULL)))
309	#define FMR_OWN_FREE FMR_OWNER(0, 1) /* free space */
310	#define FMR_OWN_UNKNOWN FMR_OWNER(0, 2) /* unknown owner */
311	#define FMR_OWN_METADATA FMR_OWNER(0, 3) /* metadata */
312
313	#define FS_IOC_GETFSMAP _IOWR('X', 59, struct fsmap_head)
314
315	#define HAVE_GETFSMAP
316	#endif /* HAVE_GETFSMAP */
317
dad79683 RZ	318	#ifndef HAVE_MAP_SYNC
	319	#define MAP_SYNC 0
	320	#define MAP_SHARED_VALIDATE 0
	321	#else
	322	#include <asm-generic/mman.h>
	323	#include <asm-generic/mman-common.h>
	324	#endif /* HAVE_MAP_SYNC */
	325
cb5b3ef4	326	#endif /* __XFS_LINUX_H__ */