]>
git.ipfire.org Git - thirdparty/xfsprogs-dev.git/blob - include/linux.h
2 * Copyright (c) 2004-2005 Silicon Graphics, Inc. All Rights Reserved.
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.
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.
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
17 #ifndef __XFS_LINUX_H__
18 #define __XFS_LINUX_H__
20 #include <uuid/uuid.h>
22 #include <sys/ioctl.h>
23 #include <sys/param.h>
24 #include <sys/sysmacros.h>
33 #include <asm/types.h>
35 #ifdef OVERRIDE_SYSTEM_FSXATTR
36 # define fsxattr sys_fsxattr
38 #include <linux/fs.h> /* fsxattr defintion for new kernels */
39 #ifdef OVERRIDE_SYSTEM_FSXATTR
43 static __inline__
int xfsctl(const char *path
, int fd
, int cmd
, void *p
)
45 return ioctl(fd
, cmd
, p
);
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
54 static __inline__
int platform_test_xfs_fd(int fd
)
56 struct statfs statfsbuf
;
59 if (fstatfs(fd
, &statfsbuf
) < 0)
61 if (fstat(fd
, &statbuf
) < 0)
63 if (!S_ISREG(statbuf
.st_mode
) && !S_ISDIR(statbuf
.st_mode
))
65 return (statfsbuf
.f_type
== 0x58465342); /* XFSB */
68 static __inline__
int platform_test_xfs_path(const char *path
)
70 struct statfs statfsbuf
;
73 if (statfs(path
, &statfsbuf
) < 0)
75 if (stat(path
, &statbuf
) < 0)
77 if (!S_ISREG(statbuf
.st_mode
) && !S_ISDIR(statbuf
.st_mode
))
79 return (statfsbuf
.f_type
== 0x58465342); /* XFSB */
82 static __inline__
int platform_fstatfs(int fd
, struct statfs
*buf
)
84 return fstatfs(fd
, buf
);
87 static __inline__
void platform_getoptreset(void)
93 static __inline__
int platform_uuid_compare(uuid_t
*uu1
, uuid_t
*uu2
)
95 return uuid_compare(*uu1
, *uu2
);
98 static __inline__
void platform_uuid_unparse(uuid_t
*uu
, char *buffer
)
100 uuid_unparse(*uu
, buffer
);
103 static __inline__
int platform_uuid_parse(char *buffer
, uuid_t
*uu
)
105 return uuid_parse(buffer
, *uu
);
108 static __inline__
int platform_uuid_is_null(uuid_t
*uu
)
110 return uuid_is_null(*uu
);
113 static __inline__
void platform_uuid_generate(uuid_t
*uu
)
118 static __inline__
void platform_uuid_clear(uuid_t
*uu
)
123 static __inline__
void platform_uuid_copy(uuid_t
*dst
, uuid_t
*src
)
125 uuid_copy(*dst
, *src
);
129 #define BLKDISCARD _IO(0x12,119)
132 static __inline__
int
133 platform_discard_blocks(int fd
, uint64_t start
, uint64_t len
)
135 uint64_t range
[2] = { start
, len
};
137 if (ioctl(fd
, BLKDISCARD
, &range
) < 0)
142 #define ENOATTR ENODATA /* Attribute not found */
143 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
144 #define EFSBADCRC EBADMSG /* Bad CRC detected */
146 typedef off_t xfs_off_t
;
147 typedef uint64_t xfs_ino_t
;
148 typedef uint32_t xfs_dev_t
;
149 typedef int64_t xfs_daddr_t
;
150 typedef __u32 xfs_nlink_t
;
153 * Abstraction of mountpoints.
155 struct mntent_cursor
{
159 static inline int platform_mntent_open(struct mntent_cursor
* cursor
, char *mtab
)
161 cursor
->mtabp
= setmntent(mtab
, "r");
162 if (!cursor
->mtabp
) {
163 fprintf(stderr
, "Error: cannot read %s\n", mtab
);
169 static inline struct mntent
* platform_mntent_next(struct mntent_cursor
* cursor
)
171 return getmntent(cursor
->mtabp
);
174 static inline void platform_mntent_close(struct mntent_cursor
* cursor
)
176 endmntent(cursor
->mtabp
);
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.
184 #if !defined FS_IOC_FSGETXATTR || defined OVERRIDE_SYSTEM_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) */
190 __u32 fsx_cowextsize
; /* cow extsize field value (get/set) */
191 unsigned char fsx_pad
[8];
195 #ifndef FS_IOC_FSGETXATTR
197 * Flags for the fsx_xflags field
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 */
213 #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */
214 #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */
216 #define FS_IOC_FSGETXATTR _IOR ('X', 31, struct fsxattr)
217 #define FS_IOC_FSSETXATTR _IOW ('X', 32, struct fsxattr)
221 #ifndef FS_XFLAG_COWEXTSIZE
222 #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */
226 # include <linux/fsmap.h>
229 * Structure for FS_IOC_GETFSMAP.
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.
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.
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.
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
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.
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 */
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 */
281 struct fsmap fmh_keys
[2]; /* low and high keys for the mapping search */
282 struct fsmap fmh_recs
[]; /* returned records */
285 /* Size of an fsmap_head with room for nr records. */
290 return sizeof(struct fsmap_head
) + nr
* sizeof(struct fsmap
);
293 /* Start the next fsmap query at the end of the current query results. */
296 struct fsmap_head
*head
)
298 head
->fmh_keys
[0] = head
->fmh_recs
[head
->fmh_entries
- 1];
301 /* fmh_iflags values - set by XFS_IOC_GETFSMAP caller in the header. */
302 /* no flags defined yet */
303 #define FMH_IF_VALID 0
305 /* fmh_oflags values - returned in the header segment only. */
306 #define FMH_OF_DEV_T 0x1 /* fmr_device values will be dev_t */
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 */
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 */
325 #define FS_IOC_GETFSMAP _IOWR('X', 59, struct fsmap_head)
327 #define HAVE_GETFSMAP
328 #endif /* HAVE_GETFSMAP */
330 #endif /* __XFS_LINUX_H__ */