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

/*
 * Copyright (c) 2004-2005 Silicon Graphics, Inc.  All Rights Reserved.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it would be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write the Free Software Foundation,
 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
#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
c0211f67	1	/*
f302e9e4	2	* Copyright (c) 2004-2005 Silicon Graphics, Inc. All Rights Reserved.
c0211f67	3	*
f302e9e4 NS	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU Lesser General Public License
	6	* as published by the Free Software Foundation.
c0211f67	7	*
f302e9e4 NS	8	* This program is distributed in the hope that it would be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU Lesser General Public License for more details.
c0211f67	12	*
f302e9e4 NS	13	* You should have received a copy of the GNU Lesser General Public License
	14	* along with this program; if not, write the Free Software Foundation,
	15	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
c0211f67 NS	16	*/
	17	#ifndef __XFS_LINUX_H__
	18	#define __XFS_LINUX_H__
	19
	20	#include <uuid/uuid.h>
	21	#include <sys/vfs.h>
	22	#include <sys/ioctl.h>
	23	#include <sys/param.h>
25d246df	24	#include <sys/sysmacros.h>
66210ef2	25	#include <sys/stat.h>
5d1b7f0f	26	#include <inttypes.h>
c0211f67 NS	27	#include <malloc.h>
c0211f67 NS	28	#include <getopt.h>
dcabd4e7	29	#include <errno.h>
c0211f67	30	#include <endian.h>
a2ceac1f	31	#include <stdbool.h>
7c66b2fd	32	#include <stdio.h>
24842c5c	33	#include <asm/types.h>
7141fc5b	34	#include <mntent.h>
6529e656 DW	35	#ifdef OVERRIDE_SYSTEM_FSXATTR
	36	# define fsxattr sys_fsxattr
	37	#endif
2be9e939	38	#include <linux/fs.h> /* fsxattr defintion for new kernels */
6529e656 DW	39	#ifdef OVERRIDE_SYSTEM_FSXATTR
	40	# undef fsxattr
	41	#endif
c0211f67 NS	42
	43	static __inline__ int xfsctl(const char path, int fd, int cmd, void p)
	44	{
	45	return ioctl(fd, cmd, p);
	46	}
	47
fcd6fa7f ES	48	/*
	49	* platform_test_xfs_*() implies that xfsctl will succeed on the file;
	50	* on Linux, at least, special files don't get xfs file ops,
	51	* so return 0 for those
	52	*/
	53
c0211f67 NS	54	static __inline__ int platform_test_xfs_fd(int fd)
c0211f67 NS	55	{
fcd6fa7f ES	56	struct statfs statfsbuf;
	57	struct stat statbuf;
	58
	59	if (fstatfs(fd, &statfsbuf) < 0)
	60	return 0;
	61	if (fstat(fd, &statbuf) < 0)
c0211f67	62	return 0;
fcd6fa7f ES	63	if (!S_ISREG(statbuf.st_mode) && !S_ISDIR(statbuf.st_mode))
	64	return 0;
	65	return (statfsbuf.f_type == 0x58465342); /* XFSB */
c0211f67 NS	66	}
	67
	68	static __inline__ int platform_test_xfs_path(const char *path)
	69	{
fcd6fa7f ES	70	struct statfs statfsbuf;
	71	struct stat statbuf;
	72
	73	if (statfs(path, &statfsbuf) < 0)
	74	return 0;
	75	if (stat(path, &statbuf) < 0)
	76	return 0;
	77	if (!S_ISREG(statbuf.st_mode) && !S_ISDIR(statbuf.st_mode))
c0211f67	78	return 0;
fcd6fa7f	79	return (statfsbuf.f_type == 0x58465342); /* XFSB */
c0211f67 NS	80	}
	81
	82	static __inline__ int platform_fstatfs(int fd, struct statfs *buf)
	83	{
	84	return fstatfs(fd, buf);
	85	}
	86
	87	static __inline__ void platform_getoptreset(void)
	88	{
	89	extern int optind;
	90	optind = 0;
	91	}
	92
1552a820 NS	93	static __inline__ int platform_uuid_compare(uuid_t uu1, uuid_t uu2)
	94	{
	95	return uuid_compare(uu1, uu2);
	96	}
	97
4d32d744	98	static __inline__ void platform_uuid_unparse(uuid_t uu, char buffer)
1552a820	99	{
4d32d744 NS	100	uuid_unparse(*uu, buffer);
	101	}
	102
	103	static __inline__ int platform_uuid_parse(char buffer, uuid_t uu)
	104	{
	105	return uuid_parse(buffer, *uu);
1552a820 NS	106	}
	107
	108	static __inline__ int platform_uuid_is_null(uuid_t *uu)
	109	{
	110	return uuid_is_null(*uu);
	111	}
c0211f67	112
4d32d744 NS	113	static __inline__ void platform_uuid_generate(uuid_t *uu)
	114	{
	115	uuid_generate(*uu);
	116	}
	117
	118	static __inline__ void platform_uuid_clear(uuid_t *uu)
	119	{
	120	uuid_clear(*uu);
	121	}
	122
	123	static __inline__ void platform_uuid_copy(uuid_t dst, uuid_t src)
	124	{
	125	uuid_copy(dst, src);
	126	}
	127
ad136b33 CH	128	#ifndef BLKDISCARD
	129	#define BLKDISCARD _IO(0x12,119)
	130	#endif
	131
	132	static __inline__ int
f96aff0c	133	platform_discard_blocks(int fd, uint64_t start, uint64_t len)
ad136b33	134	{
14f8b681	135	uint64_t range[2] = { start, len };
ad136b33 CH	136
	137	if (ioctl(fd, BLKDISCARD, &range) < 0)
	138	return errno;
	139	return 0;
	140	}
	141
c0211f67	142	#define ENOATTR ENODATA /* Attribute not found */
1552a820	143	#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
99c1ec96	144	#define EFSBADCRC EBADMSG /* Bad CRC detected */
c0211f67	145
65b4f302	146	typedef off_t xfs_off_t;
14f8b681 DW	147	typedef uint64_t xfs_ino_t;
	148	typedef uint32_t xfs_dev_t;
	149	typedef int64_t xfs_daddr_t;
d8079fe0	150	typedef __u32 xfs_nlink_t;
c0211f67	151
7141fc5b JT	152	/**
	153	* Abstraction of mountpoints.
	154	*/
	155	struct mntent_cursor {
	156	FILE *mtabp;
	157	};
	158
	159	static inline int platform_mntent_open(struct mntent_cursor * cursor, char *mtab)
	160	{
	161	cursor->mtabp = setmntent(mtab, "r");
	162	if (!cursor->mtabp) {
	163	fprintf(stderr, "Error: cannot read %s\n", mtab);
	164	return 1;
	165	}
	166	return 0;
	167	}
	168
	169	static inline struct mntent * platform_mntent_next(struct mntent_cursor * cursor)
	170	{
	171	return getmntent(cursor->mtabp);
	172	}
	173
	174	static inline void platform_mntent_close(struct mntent_cursor * cursor)
	175	{
	176	endmntent(cursor->mtabp);
	177	}
	178
83f4b5ac DC	179	/*
	180	* Check whether we have to define FS_IOC_FS[GS]ETXATTR ourselves. These
	181	* are a copy of the definitions moved to linux/uapi/fs.h in the 4.5 kernel,
	182	* so this is purely for supporting builds against old kernel headers.
	183	*/
6529e656	184	#if !defined FS_IOC_FSGETXATTR \|\| defined OVERRIDE_SYSTEM_FSXATTR
83f4b5ac DC	185	struct fsxattr {
	186	__u32 fsx_xflags; /* xflags field value (get/set) */
	187	__u32 fsx_extsize; /* extsize field value (get/set)*/
	188	__u32 fsx_nextents; /* nextents field value (get) */
	189	__u32 fsx_projid; /* project identifier (get/set) */
1bc58d93 DW	190	__u32 fsx_cowextsize; /* cow extsize field value (get/set) */
1bc58d93 DW	191	unsigned char fsx_pad[8];
83f4b5ac	192	};
6529e656	193	#endif
83f4b5ac	194
6529e656	195	#ifndef FS_IOC_FSGETXATTR
83f4b5ac DC	196	/*
	197	* Flags for the fsx_xflags field
	198	*/
	199	#define FS_XFLAG_REALTIME 0x00000001 /* data in realtime volume */
	200	#define FS_XFLAG_PREALLOC 0x00000002 /* preallocated file extents */
	201	#define FS_XFLAG_IMMUTABLE 0x00000008 /* file cannot be modified */
	202	#define FS_XFLAG_APPEND 0x00000010 /* all writes append */
	203	#define FS_XFLAG_SYNC 0x00000020 /* all writes synchronous */
	204	#define FS_XFLAG_NOATIME 0x00000040 /* do not update access time */
	205	#define FS_XFLAG_NODUMP 0x00000080 /* do not include in backups */
	206	#define FS_XFLAG_RTINHERIT 0x00000100 /* create with rt bit set */
	207	#define FS_XFLAG_PROJINHERIT 0x00000200 /* create with parents projid */
	208	#define FS_XFLAG_NOSYMLINKS 0x00000400 /* disallow symlink creation */
	209	#define FS_XFLAG_EXTSIZE 0x00000800 /* extent size allocator hint */
	210	#define FS_XFLAG_EXTSZINHERIT 0x00001000 /* inherit inode extent size */
	211	#define FS_XFLAG_NODEFRAG 0x00002000 /* do not defragment */
	212	#define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */
7093f633	213	#define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
83f4b5ac DC	214	#define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
	215
	216	#define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr)
	217	#define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr)
	218
	219	#endif
	220
1bc58d93 DW	221	#ifndef FS_XFLAG_COWEXTSIZE
	222	#define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */
	223	#endif
	224
6644005b DW	225	#ifdef HAVE_GETFSMAP
	226	# include <linux/fsmap.h>
	227	#else
71956d72 DW	228	/*
	229	* Structure for FS_IOC_GETFSMAP.
	230	*
	231	* The memory layout for this call are the scalar values defined in
	232	* struct fsmap_head, followed by two struct fsmap that describe
	233	* the lower and upper bound of mappings to return, followed by an
	234	* array of struct fsmap mappings.
	235	*
	236	* fmh_iflags control the output of the call, whereas fmh_oflags report
	237	* on the overall record output. fmh_count should be set to the
	238	* length of the fmh_recs array, and fmh_entries will be set to the
	239	* number of entries filled out during each call. If fmh_count is
	240	* zero, the number of reverse mappings will be returned in
	241	* fmh_entries, though no mappings will be returned. fmh_reserved
	242	* must be set to zero.
	243	*
	244	* The two elements in the fmh_keys array are used to constrain the
	245	* output. The first element in the array should represent the
	246	* lowest disk mapping ("low key") that the user wants to learn
	247	* about. If this value is all zeroes, the filesystem will return
	248	* the first entry it knows about. For a subsequent call, the
	249	* contents of fsmap_head.fmh_recs[fsmap_head.fmh_count - 1] should be
	250	* copied into fmh_keys[0] to have the kernel start where it left off.
	251	*
	252	* The second element in the fmh_keys array should represent the
	253	* highest disk mapping ("high key") that the user wants to learn
	254	* about. If this value is all ones, the filesystem will not stop
	255	* until it runs out of mapping to return or runs out of space in
	256	* fmh_recs.
	257	*
	258	* fmr_device can be either a 32-bit cookie representing a device, or
	259	* a 32-bit dev_t if the FMH_OF_DEV_T flag is set. fmr_physical,
	260	* fmr_offset, and fmr_length are expressed in units of bytes.
	261	* fmr_owner is either an inode number, or a special value if
	262	* FMR_OF_SPECIAL_OWNER is set in fmr_flags.
	263	*/
	264	struct fsmap {
	265	__u32 fmr_device; /* device id */
	266	__u32 fmr_flags; /* mapping flags */
	267	__u64 fmr_physical; /* device offset of segment */
	268	__u64 fmr_owner; /* owner id */
	269	__u64 fmr_offset; /* file offset of segment */
	270	__u64 fmr_length; /* length of segment */
	271	__u64 fmr_reserved[3]; /* must be zero */
	272	};
	273
	274	struct fsmap_head {
	275	__u32 fmh_iflags; /* control flags */
	276	__u32 fmh_oflags; /* output flags */
	277	__u32 fmh_count; /* # of entries in array incl. input */
	278	__u32 fmh_entries; /* # of entries filled in (output). */
	279	__u64 fmh_reserved[6]; /* must be zero */
	280
	281	struct fsmap fmh_keys[2]; /* low and high keys for the mapping search */
	282	struct fsmap fmh_recs[]; /* returned records */
	283	};
	284
	285	/* Size of an fsmap_head with room for nr records. */
	286	static inline size_t
	287	fsmap_sizeof(
	288	unsigned int nr)
	289	{
	290	return sizeof(struct fsmap_head) + nr * sizeof(struct fsmap);
	291	}
292
293	/* Start the next fsmap query at the end of the current query results. */
294	static inline void
295	fsmap_advance(
296	struct fsmap_head *head)
297	{
298	head->fmh_keys[0] = head->fmh_recs[head->fmh_entries - 1];
299	}
300
301	/* fmh_iflags values - set by XFS_IOC_GETFSMAP caller in the header. */
302	/* no flags defined yet */
303	#define FMH_IF_VALID 0
304
305	/* fmh_oflags values - returned in the header segment only. */
306	#define FMH_OF_DEV_T 0x1 /* fmr_device values will be dev_t */
307
308	/* fmr_flags values - returned for each non-header segment */
309	#define FMR_OF_PREALLOC 0x1 /* segment = unwritten pre-allocation */
310	#define FMR_OF_ATTR_FORK 0x2 /* segment = attribute fork */
311	#define FMR_OF_EXTENT_MAP 0x4 /* segment = extent map */
312	#define FMR_OF_SHARED 0x8 /* segment = shared with another file */
313	#define FMR_OF_SPECIAL_OWNER 0x10 /* owner is a special value */
314	#define FMR_OF_LAST 0x20 /* segment is the last in the FS */
315
316	/* Each FS gets to define its own special owner codes. */
317	#define FMR_OWNER(type, code) (((__u64)type << 32) \| \
318	((__u64)code & 0xFFFFFFFFULL))
319	#define FMR_OWNER_TYPE(owner) ((__u32)((__u64)owner >> 32))
320	#define FMR_OWNER_CODE(owner) ((__u32)(((__u64)owner & 0xFFFFFFFFULL)))
321	#define FMR_OWN_FREE FMR_OWNER(0, 1) /* free space */
322	#define FMR_OWN_UNKNOWN FMR_OWNER(0, 2) /* unknown owner */
323	#define FMR_OWN_METADATA FMR_OWNER(0, 3) /* metadata */
324
325	#define FS_IOC_GETFSMAP _IOWR('X', 59, struct fsmap_head)
326
327	#define HAVE_GETFSMAP
328	#endif /* HAVE_GETFSMAP */
329
dad79683 RZ	330	#ifndef HAVE_MAP_SYNC
	331	#define MAP_SYNC 0
	332	#define MAP_SHARED_VALIDATE 0
	333	#else
	334	#include <asm-generic/mman.h>
	335	#include <asm-generic/mman-common.h>
	336	#endif /* HAVE_MAP_SYNC */
	337
cb5b3ef4	338	#endif /* __XFS_LINUX_H__ */