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/*
* 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__ */