1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #ifndef __XFS_LOG_FORMAT_H__
7 #define __XFS_LOG_FORMAT_H__
8
9 struct xfs_mount;
10 struct xfs_trans_res;
11
12 /*
13 * On-disk Log Format definitions.
14 *
15 * This file contains all the on-disk format definitions used within the log. It
16 * includes the physical log structure itself, as well as all the log item
17 * format structures that are written into the log and intepreted by log
18 * recovery. We start with the physical log format definitions, and then work
19 * through all the log items definitions and everything they encode into the
20 * log.
21 */
22 typedef uint32_t xlog_tid_t;
23
24 #define XLOG_MIN_ICLOGS 2
25 #define XLOG_MAX_ICLOGS 8
26 #define XLOG_HEADER_MAGIC_NUM 0xFEEDbabe /* Invalid cycle number */
27 #define XLOG_VERSION_1 1
28 #define XLOG_VERSION_2 2 /* Large IClogs, Log sunit */
29 #define XLOG_VERSION_OKBITS (XLOG_VERSION_1 | XLOG_VERSION_2)
30 #define XLOG_MIN_RECORD_BSIZE (16*1024) /* eventually 32k */
31 #define XLOG_BIG_RECORD_BSIZE (32*1024) /* 32k buffers */
32 #define XLOG_MAX_RECORD_BSIZE (256*1024)
33 #define XLOG_HEADER_CYCLE_SIZE (32*1024) /* cycle data in header */
34 #define XLOG_CYCLE_DATA_SIZE (XLOG_HEADER_CYCLE_SIZE / BBSIZE)
35 #define XLOG_MIN_RECORD_BSHIFT 14 /* 16384 == 1 << 14 */
36 #define XLOG_BIG_RECORD_BSHIFT 15 /* 32k == 1 << 15 */
37 #define XLOG_MAX_RECORD_BSHIFT 18 /* 256k == 1 << 18 */
38
39 #define XLOG_HEADER_SIZE 512
40
41 /* Minimum number of transactions that must fit in the log (defined by mkfs) */
42 #define XFS_MIN_LOG_FACTOR 3
43
44 #define XLOG_REC_SHIFT(log) \
45 BTOBB(1 << (xfs_has_logv2(log->l_mp) ? \
46 XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT))
47 #define XLOG_TOTAL_REC_SHIFT(log) \
48 BTOBB(XLOG_MAX_ICLOGS << (xfs_has_logv2(log->l_mp) ? \
49 XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT))
50
51 /* get lsn fields */
52 #define CYCLE_LSN(lsn) ((uint)((lsn)>>32))
53 #define BLOCK_LSN(lsn) ((uint)(lsn))
54
55 /* this is used in a spot where we might otherwise double-endian-flip */
56 #define CYCLE_LSN_DISK(lsn) (((__be32 *)&(lsn))[0])
57
xlog_assign_lsn(uint cycle,uint block)58 static inline xfs_lsn_t xlog_assign_lsn(uint cycle, uint block)
59 {
60 return ((xfs_lsn_t)cycle << 32) | block;
61 }
62
xlog_get_cycle(char * ptr)63 static inline uint xlog_get_cycle(char *ptr)
64 {
65 if (be32_to_cpu(*(__be32 *)ptr) == XLOG_HEADER_MAGIC_NUM)
66 return be32_to_cpu(*((__be32 *)ptr + 1));
67 else
68 return be32_to_cpu(*(__be32 *)ptr);
69 }
70
71 /* Log Clients */
72 #define XFS_TRANSACTION 0x69
73 #define XFS_LOG 0xaa
74
75 #define XLOG_UNMOUNT_TYPE 0x556e /* Un for Unmount */
76
77 /*
78 * Log item for unmount records.
79 *
80 * The unmount record used to have a string "Unmount filesystem--" in the
81 * data section where the "Un" was really a magic number (XLOG_UNMOUNT_TYPE).
82 * We just write the magic number now; see xfs_log_unmount_write.
83 */
84 struct xfs_unmount_log_format {
85 uint16_t magic; /* XLOG_UNMOUNT_TYPE */
86 uint16_t pad1;
87 uint32_t pad2; /* may as well make it 64 bits */
88 };
89
90 /*
91 * Flags to log operation header
92 *
93 * The first write of a new transaction will be preceded with a start
94 * record, XLOG_START_TRANS. Once a transaction is committed, a commit
95 * record is written, XLOG_COMMIT_TRANS. If a single region can not fit into
96 * the remainder of the current active in-core log, it is split up into
97 * multiple regions. Each partial region will be marked with a
98 * XLOG_CONTINUE_TRANS until the last one, which gets marked with XLOG_END_TRANS.
99 *
100 */
101 #define XLOG_START_TRANS 0x01 /* Start a new transaction */
102 #define XLOG_COMMIT_TRANS 0x02 /* Commit this transaction */
103 #define XLOG_CONTINUE_TRANS 0x04 /* Cont this trans into new region */
104 #define XLOG_WAS_CONT_TRANS 0x08 /* Cont this trans into new region */
105 #define XLOG_END_TRANS 0x10 /* End a continued transaction */
106 #define XLOG_UNMOUNT_TRANS 0x20 /* Unmount a filesystem transaction */
107
108 struct xlog_op_header {
109 __be32 oh_tid; /* transaction id of operation : 4 b */
110 __be32 oh_len; /* bytes in data region : 4 b */
111 __u8 oh_clientid; /* who sent me this : 1 b */
112 __u8 oh_flags; /* : 1 b */
113 __u16 oh_res2; /* 32 bit align : 2 b */
114 };
115
116 /* valid values for h_fmt */
117 #define XLOG_FMT_UNKNOWN 0
118 #define XLOG_FMT_LINUX_LE 1
119 #define XLOG_FMT_LINUX_BE 2
120 #define XLOG_FMT_IRIX_BE 3
121
122 /* our fmt */
123 #ifdef XFS_NATIVE_HOST
124 #define XLOG_FMT XLOG_FMT_LINUX_BE
125 #else
126 #define XLOG_FMT XLOG_FMT_LINUX_LE
127 #endif
128
129 struct xlog_rec_ext_header {
130 __be32 xh_cycle; /* write cycle of log */
131 __be32 xh_cycle_data[XLOG_CYCLE_DATA_SIZE];
132 __u8 xh_reserved[252];
133 };
134
135 /* actual ext header payload size for checksumming */
136 #define XLOG_REC_EXT_SIZE \
137 offsetofend(struct xlog_rec_ext_header, xh_cycle_data)
138
139 struct xlog_rec_header {
140 __be32 h_magicno; /* log record (LR) identifier : 4 */
141 __be32 h_cycle; /* write cycle of log : 4 */
142 __be32 h_version; /* LR version : 4 */
143 __be32 h_len; /* len in bytes; should be 64-bit aligned: 4 */
144 __be64 h_lsn; /* lsn of this LR : 8 */
145 __be64 h_tail_lsn; /* lsn of 1st LR w/ buffers not committed: 8 */
146 __le32 h_crc; /* crc of log record : 4 */
147 __be32 h_prev_block; /* block number to previous LR : 4 */
148 __be32 h_num_logops; /* number of log operations in this LR : 4 */
149 __be32 h_cycle_data[XLOG_CYCLE_DATA_SIZE];
150
151 /* fields added by the Linux port: */
152 __be32 h_fmt; /* format of log record : 4 */
153 uuid_t h_fs_uuid; /* uuid of FS : 16 */
154
155 /* fields added for log v2: */
156 __be32 h_size; /* iclog size : 4 */
157
158 /*
159 * When h_size added for log v2 support, it caused structure to have
160 * a different size on i386 vs all other architectures because the
161 * sum of the size ofthe member is not aligned by that of the largest
162 * __be64-sized member, and i386 has really odd struct alignment rules.
163 *
164 * Due to the way the log headers are placed out on-disk that alone is
165 * not a problem becaue the xlog_rec_header always sits alone in a
166 * BBSIZEs area, and the rest of that area is padded with zeroes.
167 * But xlog_cksum used to calculate the checksum based on the structure
168 * size, and thus gives different checksums for i386 vs the rest.
169 * We now do two checksum validation passes for both sizes to allow
170 * moving v5 file systems with unclean logs between i386 and other
171 * (little-endian) architectures.
172 */
173 __u32 h_pad0;
174
175 __u8 h_reserved[184];
176 struct xlog_rec_ext_header h_ext[];
177 };
178
179 #ifdef __i386__
180 #define XLOG_REC_SIZE offsetofend(struct xlog_rec_header, h_size)
181 #define XLOG_REC_SIZE_OTHER offsetofend(struct xlog_rec_header, h_pad0)
182 #else
183 #define XLOG_REC_SIZE offsetofend(struct xlog_rec_header, h_pad0)
184 #define XLOG_REC_SIZE_OTHER offsetofend(struct xlog_rec_header, h_size)
185 #endif /* __i386__ */
186
187 /*
188 * Transaction Header definitions.
189 *
190 * This is the structure written in the log at the head of every transaction. It
191 * identifies the type and id of the transaction, and contains the number of
192 * items logged by the transaction so we know how many to expect during
193 * recovery.
194 *
195 * Do not change the below structure without redoing the code in
196 * xlog_recover_add_to_trans() and xlog_recover_add_to_cont_trans().
197 */
198 struct xfs_trans_header {
199 uint th_magic; /* magic number */
200 uint th_type; /* transaction type */
201 int32_t th_tid; /* transaction id (unused) */
202 uint th_num_items; /* num items logged by trans */
203 };
204
205 #define XFS_TRANS_HEADER_MAGIC 0x5452414e /* TRAN */
206
207 /*
208 * The only type valid for th_type in CIL-enabled file system logs:
209 */
210 #define XFS_TRANS_CHECKPOINT 40
211
212 /*
213 * Log item types.
214 */
215 #define XFS_LI_EFI 0x1236
216 #define XFS_LI_EFD 0x1237
217 #define XFS_LI_IUNLINK 0x1238
218 #define XFS_LI_INODE 0x123b /* aligned ino chunks, var-size ibufs */
219 #define XFS_LI_BUF 0x123c /* v2 bufs, variable sized inode bufs */
220 #define XFS_LI_DQUOT 0x123d
221 #define XFS_LI_QUOTAOFF 0x123e
222 #define XFS_LI_ICREATE 0x123f
223 #define XFS_LI_RUI 0x1240 /* rmap update intent */
224 #define XFS_LI_RUD 0x1241
225 #define XFS_LI_CUI 0x1242 /* refcount update intent */
226 #define XFS_LI_CUD 0x1243
227 #define XFS_LI_BUI 0x1244 /* bmbt update intent */
228 #define XFS_LI_BUD 0x1245
229 #define XFS_LI_ATTRI 0x1246 /* attr set/remove intent*/
230 #define XFS_LI_ATTRD 0x1247 /* attr set/remove done */
231 #define XFS_LI_XMI 0x1248 /* mapping exchange intent */
232 #define XFS_LI_XMD 0x1249 /* mapping exchange done */
233 #define XFS_LI_EFI_RT 0x124a /* realtime extent free intent */
234 #define XFS_LI_EFD_RT 0x124b /* realtime extent free done */
235 #define XFS_LI_RUI_RT 0x124c /* realtime rmap update intent */
236 #define XFS_LI_RUD_RT 0x124d /* realtime rmap update done */
237 #define XFS_LI_CUI_RT 0x124e /* realtime refcount update intent */
238 #define XFS_LI_CUD_RT 0x124f /* realtime refcount update done */
239
240 #define XFS_LI_TYPE_DESC \
241 { XFS_LI_EFI, "XFS_LI_EFI" }, \
242 { XFS_LI_EFD, "XFS_LI_EFD" }, \
243 { XFS_LI_IUNLINK, "XFS_LI_IUNLINK" }, \
244 { XFS_LI_INODE, "XFS_LI_INODE" }, \
245 { XFS_LI_BUF, "XFS_LI_BUF" }, \
246 { XFS_LI_DQUOT, "XFS_LI_DQUOT" }, \
247 { XFS_LI_QUOTAOFF, "XFS_LI_QUOTAOFF" }, \
248 { XFS_LI_ICREATE, "XFS_LI_ICREATE" }, \
249 { XFS_LI_RUI, "XFS_LI_RUI" }, \
250 { XFS_LI_RUD, "XFS_LI_RUD" }, \
251 { XFS_LI_CUI, "XFS_LI_CUI" }, \
252 { XFS_LI_CUD, "XFS_LI_CUD" }, \
253 { XFS_LI_BUI, "XFS_LI_BUI" }, \
254 { XFS_LI_BUD, "XFS_LI_BUD" }, \
255 { XFS_LI_ATTRI, "XFS_LI_ATTRI" }, \
256 { XFS_LI_ATTRD, "XFS_LI_ATTRD" }, \
257 { XFS_LI_XMI, "XFS_LI_XMI" }, \
258 { XFS_LI_XMD, "XFS_LI_XMD" }, \
259 { XFS_LI_EFI_RT, "XFS_LI_EFI_RT" }, \
260 { XFS_LI_EFD_RT, "XFS_LI_EFD_RT" }, \
261 { XFS_LI_RUI_RT, "XFS_LI_RUI_RT" }, \
262 { XFS_LI_RUD_RT, "XFS_LI_RUD_RT" }, \
263 { XFS_LI_CUI_RT, "XFS_LI_CUI_RT" }, \
264 { XFS_LI_CUD_RT, "XFS_LI_CUD_RT" }
265
266 /*
267 * Inode Log Item Format definitions.
268 *
269 * This is the structure used to lay out an inode log item in the
270 * log. The size of the inline data/extents/b-tree root to be logged
271 * (if any) is indicated in the ilf_dsize field. Changes to this structure
272 * must be added on to the end.
273 */
274 struct xfs_inode_log_format {
275 uint16_t ilf_type; /* inode log item type */
276 uint16_t ilf_size; /* size of this item */
277 uint32_t ilf_fields; /* flags for fields logged */
278 uint16_t ilf_asize; /* size of attr d/ext/root */
279 uint16_t ilf_dsize; /* size of data/ext/root */
280 uint32_t ilf_pad; /* pad for 64 bit boundary */
281 uint64_t ilf_ino; /* inode number */
282 union {
283 uint32_t ilfu_rdev; /* rdev value for dev inode*/
284 uint8_t __pad[16]; /* unused */
285 } ilf_u;
286 int64_t ilf_blkno; /* blkno of inode buffer */
287 int32_t ilf_len; /* len of inode buffer */
288 int32_t ilf_boffset; /* off of inode in buffer */
289 };
290
291 /*
292 * Old 32 bit systems will log in this format without the 64 bit
293 * alignment padding. Recovery will detect this and convert it to the
294 * correct format.
295 */
296 struct xfs_inode_log_format_32 {
297 uint16_t ilf_type; /* inode log item type */
298 uint16_t ilf_size; /* size of this item */
299 uint32_t ilf_fields; /* flags for fields logged */
300 uint16_t ilf_asize; /* size of attr d/ext/root */
301 uint16_t ilf_dsize; /* size of data/ext/root */
302 uint64_t ilf_ino; /* inode number */
303 union {
304 uint32_t ilfu_rdev; /* rdev value for dev inode*/
305 uint8_t __pad[16]; /* unused */
306 } ilf_u;
307 int64_t ilf_blkno; /* blkno of inode buffer */
308 int32_t ilf_len; /* len of inode buffer */
309 int32_t ilf_boffset; /* off of inode in buffer */
310 } __attribute__((packed));
311
312
313 /*
314 * Flags for xfs_trans_log_inode flags field.
315 */
316 #define XFS_ILOG_CORE 0x001 /* log standard inode fields */
317 #define XFS_ILOG_DDATA 0x002 /* log i_df.if_data */
318 #define XFS_ILOG_DEXT 0x004 /* log i_df.if_extents */
319 #define XFS_ILOG_DBROOT 0x008 /* log i_df.i_broot */
320 #define XFS_ILOG_DEV 0x010 /* log the dev field */
321 #define XFS_ILOG_UUID 0x020 /* added long ago, but never used */
322 #define XFS_ILOG_ADATA 0x040 /* log i_af.if_data */
323 #define XFS_ILOG_AEXT 0x080 /* log i_af.if_extents */
324 #define XFS_ILOG_ABROOT 0x100 /* log i_af.i_broot */
325 #define XFS_ILOG_DOWNER 0x200 /* change the data fork owner on replay */
326 #define XFS_ILOG_AOWNER 0x400 /* change the attr fork owner on replay */
327
328 /*
329 * The timestamps are dirty, but not necessarily anything else in the inode
330 * core. Unlike the other fields above this one must never make it to disk
331 * in the ilf_fields of the inode_log_format, but is purely store in-memory in
332 * ili_fields in the inode_log_item.
333 */
334 #define XFS_ILOG_TIMESTAMP 0x4000
335
336 /*
337 * The version field has been changed, but not necessarily anything else of
338 * interest. This must never make it to disk - it is used purely to ensure that
339 * the inode item ->precommit operation can update the fsync flag triggers
340 * in the inode item correctly.
341 */
342 #define XFS_ILOG_IVERSION 0x8000
343
344 #define XFS_ILOG_DFORK (XFS_ILOG_DDATA | XFS_ILOG_DEXT | \
345 XFS_ILOG_DBROOT)
346
347 #define XFS_ILOG_AFORK (XFS_ILOG_ADATA | XFS_ILOG_AEXT | \
348 XFS_ILOG_ABROOT)
349
350 #define XFS_ILOG_ALL (XFS_ILOG_CORE | XFS_ILOG_DDATA | \
351 XFS_ILOG_DEXT | XFS_ILOG_DBROOT | \
352 XFS_ILOG_DEV | XFS_ILOG_ADATA | \
353 XFS_ILOG_AEXT | XFS_ILOG_ABROOT | \
354 XFS_ILOG_TIMESTAMP | XFS_ILOG_DOWNER | \
355 XFS_ILOG_AOWNER)
356
xfs_ilog_fbroot(int w)357 static inline int xfs_ilog_fbroot(int w)
358 {
359 return (w == XFS_DATA_FORK ? XFS_ILOG_DBROOT : XFS_ILOG_ABROOT);
360 }
361
xfs_ilog_fext(int w)362 static inline int xfs_ilog_fext(int w)
363 {
364 return (w == XFS_DATA_FORK ? XFS_ILOG_DEXT : XFS_ILOG_AEXT);
365 }
366
xfs_ilog_fdata(int w)367 static inline int xfs_ilog_fdata(int w)
368 {
369 return (w == XFS_DATA_FORK ? XFS_ILOG_DDATA : XFS_ILOG_ADATA);
370 }
371
372 /*
373 * Incore version of the on-disk inode core structures. We log this directly
374 * into the journal in host CPU format (for better or worse) and as such
375 * directly mirrors the xfs_dinode structure as it must contain all the same
376 * information.
377 */
378 typedef uint64_t xfs_log_timestamp_t;
379
380 /* Legacy timestamp encoding format. */
381 struct xfs_log_legacy_timestamp {
382 int32_t t_sec; /* timestamp seconds */
383 int32_t t_nsec; /* timestamp nanoseconds */
384 };
385
386 /*
387 * Define the format of the inode core that is logged. This structure must be
388 * kept identical to struct xfs_dinode except for the endianness annotations.
389 */
390 struct xfs_log_dinode {
391 uint16_t di_magic; /* inode magic # = XFS_DINODE_MAGIC */
392 uint16_t di_mode; /* mode and type of file */
393 int8_t di_version; /* inode version */
394 int8_t di_format; /* format of di_c data */
395 uint16_t di_metatype; /* metadata type, if DIFLAG2_METADATA */
396 uint32_t di_uid; /* owner's user id */
397 uint32_t di_gid; /* owner's group id */
398 uint32_t di_nlink; /* number of links to file */
399 uint16_t di_projid_lo; /* lower part of owner's project id */
400 uint16_t di_projid_hi; /* higher part of owner's project id */
401 union {
402 /* Number of data fork extents if NREXT64 is set */
403 uint64_t di_big_nextents;
404
405 /* Padding for V3 inodes without NREXT64 set. */
406 uint64_t di_v3_pad;
407
408 /* Padding and inode flush counter for V2 inodes. */
409 struct {
410 uint8_t di_v2_pad[6]; /* V2 inode zeroed space */
411 uint16_t di_flushiter; /* V2 inode incremented on flush */
412 };
413 };
414 xfs_log_timestamp_t di_atime; /* time last accessed */
415 xfs_log_timestamp_t di_mtime; /* time last modified */
416 xfs_log_timestamp_t di_ctime; /* time created/inode modified */
417 xfs_fsize_t di_size; /* number of bytes in file */
418 xfs_rfsblock_t di_nblocks; /* # of direct & btree blocks used */
419 xfs_extlen_t di_extsize; /* basic/minimum extent size for file */
420 union {
421 /*
422 * For V2 inodes and V3 inodes without NREXT64 set, this
423 * is the number of data and attr fork extents.
424 */
425 struct {
426 uint32_t di_nextents;
427 uint16_t di_anextents;
428 } __packed;
429
430 /* Number of attr fork extents if NREXT64 is set. */
431 struct {
432 uint32_t di_big_anextents;
433 uint16_t di_nrext64_pad;
434 } __packed;
435 } __packed;
436 uint8_t di_forkoff; /* attr fork offs, <<3 for 64b align */
437 int8_t di_aformat; /* format of attr fork's data */
438 uint32_t di_dmevmask; /* DMIG event mask */
439 uint16_t di_dmstate; /* DMIG state info */
440 uint16_t di_flags; /* random flags, XFS_DIFLAG_... */
441 uint32_t di_gen; /* generation number */
442
443 /* di_next_unlinked is the only non-core field in the old dinode */
444 xfs_agino_t di_next_unlinked;/* agi unlinked list ptr */
445
446 /* start of the extended dinode, writable fields */
447 uint32_t di_crc; /* CRC of the inode */
448 uint64_t di_changecount; /* number of attribute changes */
449
450 /*
451 * The LSN we write to this field during formatting is not a reflection
452 * of the current on-disk LSN. It should never be used for recovery
453 * sequencing, nor should it be recovered into the on-disk inode at all.
454 * See xlog_recover_inode_commit_pass2() and xfs_log_dinode_to_disk()
455 * for details.
456 */
457 xfs_lsn_t di_lsn;
458
459 uint64_t di_flags2; /* more random flags */
460 union {
461 /* basic cow extent size for (regular) file */
462 uint32_t di_cowextsize;
463 /* used blocks in RTG for (zoned) rtrmap inode */
464 uint32_t di_used_blocks;
465 };
466 uint8_t di_pad2[12]; /* more padding for future expansion */
467
468 /* fields only written to during inode creation */
469 xfs_log_timestamp_t di_crtime; /* time created */
470 xfs_ino_t di_ino; /* inode number */
471 uuid_t di_uuid; /* UUID of the filesystem */
472
473 /* structure must be padded to 64 bit alignment */
474 };
475
476 #define xfs_log_dinode_size(mp) \
477 (xfs_has_v3inodes((mp)) ? \
478 sizeof(struct xfs_log_dinode) : \
479 offsetof(struct xfs_log_dinode, di_next_unlinked))
480
481 /*
482 * Buffer Log Format definitions
483 *
484 * These are the physical dirty bitmap definitions for the log format structure.
485 */
486 #define XFS_BLF_CHUNK 128
487 #define XFS_BLF_SHIFT 7
488 #define BIT_TO_WORD_SHIFT 5
489 #define NBWORD (NBBY * sizeof(unsigned int))
490
491 /*
492 * This flag indicates that the buffer contains on disk inodes
493 * and requires special recovery handling.
494 */
495 #define XFS_BLF_INODE_BUF (1<<0)
496
497 /*
498 * This flag indicates that the buffer should not be replayed
499 * during recovery because its blocks are being freed.
500 */
501 #define XFS_BLF_CANCEL (1<<1)
502
503 /*
504 * This flag indicates that the buffer contains on disk
505 * user or group dquots and may require special recovery handling.
506 */
507 #define XFS_BLF_UDQUOT_BUF (1<<2)
508 #define XFS_BLF_PDQUOT_BUF (1<<3)
509 #define XFS_BLF_GDQUOT_BUF (1<<4)
510
511 /*
512 * This is the structure used to lay out a buf log item in the log. The data
513 * map describes which 128 byte chunks of the buffer have been logged.
514 *
515 * The placement of blf_map_size causes blf_data_map to start at an odd
516 * multiple of sizeof(unsigned int) offset within the struct. Because the data
517 * bitmap size will always be an even number, the end of the data_map (and
518 * therefore the structure) will also be at an odd multiple of sizeof(unsigned
519 * int). Some 64-bit compilers will insert padding at the end of the struct to
520 * ensure 64-bit alignment of blf_blkno, but 32-bit ones will not. Therefore,
521 * XFS_BLF_DATAMAP_SIZE must be an odd number to make the padding explicit and
522 * keep the structure size consistent between 32-bit and 64-bit platforms.
523 */
524 #define __XFS_BLF_DATAMAP_SIZE ((XFS_MAX_BLOCKSIZE / XFS_BLF_CHUNK) / NBWORD)
525 #define XFS_BLF_DATAMAP_SIZE (__XFS_BLF_DATAMAP_SIZE + 1)
526
527 struct xfs_buf_log_format {
528 unsigned short blf_type; /* buf log item type indicator */
529 unsigned short blf_size; /* size of this item */
530 unsigned short blf_flags; /* misc state */
531 unsigned short blf_len; /* number of blocks in this buf */
532 int64_t blf_blkno; /* starting blkno of this buf */
533 unsigned int blf_map_size; /* used size of data bitmap in words */
534 unsigned int blf_data_map[XFS_BLF_DATAMAP_SIZE]; /* dirty bitmap */
535 };
536
537 /*
538 * All buffers now need to tell recovery where the magic number
539 * is so that it can verify and calculate the CRCs on the buffer correctly
540 * once the changes have been replayed into the buffer.
541 *
542 * The type value is held in the upper 5 bits of the blf_flags field, which is
543 * an unsigned 16 bit field. Hence we need to shift it 11 bits up and down.
544 */
545 #define XFS_BLFT_BITS 5
546 #define XFS_BLFT_SHIFT 11
547 #define XFS_BLFT_MASK (((1 << XFS_BLFT_BITS) - 1) << XFS_BLFT_SHIFT)
548
549 enum xfs_blft {
550 XFS_BLFT_UNKNOWN_BUF = 0,
551 XFS_BLFT_UDQUOT_BUF,
552 XFS_BLFT_PDQUOT_BUF,
553 XFS_BLFT_GDQUOT_BUF,
554 XFS_BLFT_BTREE_BUF,
555 XFS_BLFT_AGF_BUF,
556 XFS_BLFT_AGFL_BUF,
557 XFS_BLFT_AGI_BUF,
558 XFS_BLFT_DINO_BUF,
559 XFS_BLFT_SYMLINK_BUF,
560 XFS_BLFT_DIR_BLOCK_BUF,
561 XFS_BLFT_DIR_DATA_BUF,
562 XFS_BLFT_DIR_FREE_BUF,
563 XFS_BLFT_DIR_LEAF1_BUF,
564 XFS_BLFT_DIR_LEAFN_BUF,
565 XFS_BLFT_DA_NODE_BUF,
566 XFS_BLFT_ATTR_LEAF_BUF,
567 XFS_BLFT_ATTR_RMT_BUF,
568 XFS_BLFT_SB_BUF,
569 XFS_BLFT_RTBITMAP_BUF,
570 XFS_BLFT_RTSUMMARY_BUF,
571 XFS_BLFT_MAX_BUF = (1 << XFS_BLFT_BITS),
572 };
573
574 static inline void
xfs_blft_to_flags(struct xfs_buf_log_format * blf,enum xfs_blft type)575 xfs_blft_to_flags(struct xfs_buf_log_format *blf, enum xfs_blft type)
576 {
577 ASSERT(type > XFS_BLFT_UNKNOWN_BUF && type < XFS_BLFT_MAX_BUF);
578 blf->blf_flags &= ~XFS_BLFT_MASK;
579 blf->blf_flags |= ((type << XFS_BLFT_SHIFT) & XFS_BLFT_MASK);
580 }
581
582 static inline uint16_t
xfs_blft_from_flags(struct xfs_buf_log_format * blf)583 xfs_blft_from_flags(struct xfs_buf_log_format *blf)
584 {
585 return (blf->blf_flags & XFS_BLFT_MASK) >> XFS_BLFT_SHIFT;
586 }
587
588 /*
589 * EFI/EFD log format definitions
590 */
591 struct xfs_extent {
592 xfs_fsblock_t ext_start;
593 xfs_extlen_t ext_len;
594 };
595
596 /*
597 * Since the structures in struct xfs_extent add up to 96 bytes, it has
598 * different alignments on i386 vs all other architectures, because i386
599 * does not pad structures to their natural alignment.
600 *
601 * Provide the different variants for use by a conversion routine.
602 */
603 struct xfs_extent_32 {
604 uint64_t ext_start;
605 uint32_t ext_len;
606 } __attribute__((packed));
607
608 struct xfs_extent_64 {
609 uint64_t ext_start;
610 uint32_t ext_len;
611 uint32_t ext_pad;
612 };
613
614 /*
615 * This is the structure used to lay out an efi log item in the
616 * log. The efi_extents field is a variable size array whose
617 * size is given by efi_nextents.
618 */
619 struct xfs_efi_log_format {
620 uint16_t efi_type; /* efi log item type */
621 uint16_t efi_size; /* size of this item */
622 uint32_t efi_nextents; /* # extents to free */
623 uint64_t efi_id; /* efi identifier */
624 struct xfs_extent efi_extents[]; /* array of extents to free */
625 };
626
627 static inline size_t
xfs_efi_log_format_sizeof(unsigned int nr)628 xfs_efi_log_format_sizeof(
629 unsigned int nr)
630 {
631 return sizeof(struct xfs_efi_log_format) +
632 nr * sizeof(struct xfs_extent);
633 }
634
635 struct xfs_efi_log_format_32 {
636 uint16_t efi_type; /* efi log item type */
637 uint16_t efi_size; /* size of this item */
638 uint32_t efi_nextents; /* # extents to free */
639 uint64_t efi_id; /* efi identifier */
640 struct xfs_extent_32 efi_extents[]; /* array of extents to free */
641 } __attribute__((packed));
642
643 static inline size_t
xfs_efi_log_format32_sizeof(unsigned int nr)644 xfs_efi_log_format32_sizeof(
645 unsigned int nr)
646 {
647 return sizeof(struct xfs_efi_log_format_32) +
648 nr * sizeof(struct xfs_extent_32);
649 }
650
651 struct xfs_efi_log_format_64 {
652 uint16_t efi_type; /* efi log item type */
653 uint16_t efi_size; /* size of this item */
654 uint32_t efi_nextents; /* # extents to free */
655 uint64_t efi_id; /* efi identifier */
656 struct xfs_extent_64 efi_extents[]; /* array of extents to free */
657 };
658
659 static inline size_t
xfs_efi_log_format64_sizeof(unsigned int nr)660 xfs_efi_log_format64_sizeof(
661 unsigned int nr)
662 {
663 return sizeof(struct xfs_efi_log_format_64) +
664 nr * sizeof(struct xfs_extent_64);
665 }
666
667 /*
668 * This is the structure used to lay out an efd log item in the
669 * log. The efd_extents array is a variable size array whose
670 * size is given by efd_nextents;
671 */
672 struct xfs_efd_log_format {
673 uint16_t efd_type; /* efd log item type */
674 uint16_t efd_size; /* size of this item */
675 uint32_t efd_nextents; /* # of extents freed */
676 uint64_t efd_efi_id; /* id of corresponding efi */
677 struct xfs_extent efd_extents[]; /* array of extents freed */
678 };
679
680 static inline size_t
xfs_efd_log_format_sizeof(unsigned int nr)681 xfs_efd_log_format_sizeof(
682 unsigned int nr)
683 {
684 return sizeof(struct xfs_efd_log_format) +
685 nr * sizeof(struct xfs_extent);
686 }
687
688 struct xfs_efd_log_format_32 {
689 uint16_t efd_type; /* efd log item type */
690 uint16_t efd_size; /* size of this item */
691 uint32_t efd_nextents; /* # of extents freed */
692 uint64_t efd_efi_id; /* id of corresponding efi */
693 struct xfs_extent_32 efd_extents[]; /* array of extents freed */
694 } __attribute__((packed));
695
696 static inline size_t
xfs_efd_log_format32_sizeof(unsigned int nr)697 xfs_efd_log_format32_sizeof(
698 unsigned int nr)
699 {
700 return sizeof(struct xfs_efd_log_format_32) +
701 nr * sizeof(struct xfs_extent_32);
702 }
703
704 struct xfs_efd_log_format_64 {
705 uint16_t efd_type; /* efd log item type */
706 uint16_t efd_size; /* size of this item */
707 uint32_t efd_nextents; /* # of extents freed */
708 uint64_t efd_efi_id; /* id of corresponding efi */
709 struct xfs_extent_64 efd_extents[]; /* array of extents freed */
710 };
711
712 static inline size_t
xfs_efd_log_format64_sizeof(unsigned int nr)713 xfs_efd_log_format64_sizeof(
714 unsigned int nr)
715 {
716 return sizeof(struct xfs_efd_log_format_64) +
717 nr * sizeof(struct xfs_extent_64);
718 }
719
720 /*
721 * RUI/RUD (reverse mapping) log format definitions
722 */
723 struct xfs_map_extent {
724 uint64_t me_owner;
725 uint64_t me_startblock;
726 uint64_t me_startoff;
727 uint32_t me_len;
728 uint32_t me_flags;
729 };
730
731 /* rmap me_flags: upper bits are flags, lower byte is type code */
732 #define XFS_RMAP_EXTENT_MAP 1
733 #define XFS_RMAP_EXTENT_MAP_SHARED 2
734 #define XFS_RMAP_EXTENT_UNMAP 3
735 #define XFS_RMAP_EXTENT_UNMAP_SHARED 4
736 #define XFS_RMAP_EXTENT_CONVERT 5
737 #define XFS_RMAP_EXTENT_CONVERT_SHARED 6
738 #define XFS_RMAP_EXTENT_ALLOC 7
739 #define XFS_RMAP_EXTENT_FREE 8
740 #define XFS_RMAP_EXTENT_TYPE_MASK 0xFF
741
742 #define XFS_RMAP_EXTENT_ATTR_FORK (1U << 31)
743 #define XFS_RMAP_EXTENT_BMBT_BLOCK (1U << 30)
744 #define XFS_RMAP_EXTENT_UNWRITTEN (1U << 29)
745
746 #define XFS_RMAP_EXTENT_FLAGS (XFS_RMAP_EXTENT_TYPE_MASK | \
747 XFS_RMAP_EXTENT_ATTR_FORK | \
748 XFS_RMAP_EXTENT_BMBT_BLOCK | \
749 XFS_RMAP_EXTENT_UNWRITTEN)
750
751 /*
752 * This is the structure used to lay out an rui log item in the
753 * log. The rui_extents field is a variable size array whose
754 * size is given by rui_nextents.
755 */
756 struct xfs_rui_log_format {
757 uint16_t rui_type; /* rui log item type */
758 uint16_t rui_size; /* size of this item */
759 uint32_t rui_nextents; /* # extents to free */
760 uint64_t rui_id; /* rui identifier */
761 struct xfs_map_extent rui_extents[]; /* array of extents to rmap */
762 };
763
764 static inline size_t
xfs_rui_log_format_sizeof(unsigned int nr)765 xfs_rui_log_format_sizeof(
766 unsigned int nr)
767 {
768 return sizeof(struct xfs_rui_log_format) +
769 nr * sizeof(struct xfs_map_extent);
770 }
771
772 /*
773 * This is the structure used to lay out an rud log item in the
774 * log. The rud_extents array is a variable size array whose
775 * size is given by rud_nextents;
776 */
777 struct xfs_rud_log_format {
778 uint16_t rud_type; /* rud log item type */
779 uint16_t rud_size; /* size of this item */
780 uint32_t __pad;
781 uint64_t rud_rui_id; /* id of corresponding rui */
782 };
783
784 /*
785 * CUI/CUD (refcount update) log format definitions
786 */
787 struct xfs_phys_extent {
788 uint64_t pe_startblock;
789 uint32_t pe_len;
790 uint32_t pe_flags;
791 };
792
793 /* refcount pe_flags: upper bits are flags, lower byte is type code */
794 /* Type codes are taken directly from enum xfs_refcount_intent_type. */
795 #define XFS_REFCOUNT_EXTENT_TYPE_MASK 0xFF
796
797 #define XFS_REFCOUNT_EXTENT_FLAGS (XFS_REFCOUNT_EXTENT_TYPE_MASK)
798
799 /*
800 * This is the structure used to lay out a cui log item in the
801 * log. The cui_extents field is a variable size array whose
802 * size is given by cui_nextents.
803 */
804 struct xfs_cui_log_format {
805 uint16_t cui_type; /* cui log item type */
806 uint16_t cui_size; /* size of this item */
807 uint32_t cui_nextents; /* # extents to free */
808 uint64_t cui_id; /* cui identifier */
809 struct xfs_phys_extent cui_extents[]; /* array of extents */
810 };
811
812 static inline size_t
xfs_cui_log_format_sizeof(unsigned int nr)813 xfs_cui_log_format_sizeof(
814 unsigned int nr)
815 {
816 return sizeof(struct xfs_cui_log_format) +
817 nr * sizeof(struct xfs_phys_extent);
818 }
819
820 /*
821 * This is the structure used to lay out a cud log item in the
822 * log. The cud_extents array is a variable size array whose
823 * size is given by cud_nextents;
824 */
825 struct xfs_cud_log_format {
826 uint16_t cud_type; /* cud log item type */
827 uint16_t cud_size; /* size of this item */
828 uint32_t __pad;
829 uint64_t cud_cui_id; /* id of corresponding cui */
830 };
831
832 /*
833 * BUI/BUD (inode block mapping) log format definitions
834 */
835
836 /* bmbt me_flags: upper bits are flags, lower byte is type code */
837 /* Type codes are taken directly from enum xfs_bmap_intent_type. */
838 #define XFS_BMAP_EXTENT_TYPE_MASK 0xFF
839
840 #define XFS_BMAP_EXTENT_ATTR_FORK (1U << 31)
841 #define XFS_BMAP_EXTENT_UNWRITTEN (1U << 30)
842 #define XFS_BMAP_EXTENT_REALTIME (1U << 29)
843
844 #define XFS_BMAP_EXTENT_FLAGS (XFS_BMAP_EXTENT_TYPE_MASK | \
845 XFS_BMAP_EXTENT_ATTR_FORK | \
846 XFS_BMAP_EXTENT_UNWRITTEN | \
847 XFS_BMAP_EXTENT_REALTIME)
848
849 /*
850 * This is the structure used to lay out an bui log item in the
851 * log. The bui_extents field is a variable size array whose
852 * size is given by bui_nextents.
853 */
854 struct xfs_bui_log_format {
855 uint16_t bui_type; /* bui log item type */
856 uint16_t bui_size; /* size of this item */
857 uint32_t bui_nextents; /* # extents to free */
858 uint64_t bui_id; /* bui identifier */
859 struct xfs_map_extent bui_extents[]; /* array of extents to bmap */
860 };
861
862 static inline size_t
xfs_bui_log_format_sizeof(unsigned int nr)863 xfs_bui_log_format_sizeof(
864 unsigned int nr)
865 {
866 return sizeof(struct xfs_bui_log_format) +
867 nr * sizeof(struct xfs_map_extent);
868 }
869
870 /*
871 * This is the structure used to lay out an bud log item in the
872 * log. The bud_extents array is a variable size array whose
873 * size is given by bud_nextents;
874 */
875 struct xfs_bud_log_format {
876 uint16_t bud_type; /* bud log item type */
877 uint16_t bud_size; /* size of this item */
878 uint32_t __pad;
879 uint64_t bud_bui_id; /* id of corresponding bui */
880 };
881
882 /*
883 * XMI/XMD (file mapping exchange) log format definitions
884 */
885
886 /* This is the structure used to lay out an mapping exchange log item. */
887 struct xfs_xmi_log_format {
888 uint16_t xmi_type; /* xmi log item type */
889 uint16_t xmi_size; /* size of this item */
890 uint32_t __pad; /* must be zero */
891 uint64_t xmi_id; /* xmi identifier */
892
893 uint64_t xmi_inode1; /* inumber of first file */
894 uint64_t xmi_inode2; /* inumber of second file */
895 uint32_t xmi_igen1; /* generation of first file */
896 uint32_t xmi_igen2; /* generation of second file */
897 uint64_t xmi_startoff1; /* block offset into file1 */
898 uint64_t xmi_startoff2; /* block offset into file2 */
899 uint64_t xmi_blockcount; /* number of blocks */
900 uint64_t xmi_flags; /* XFS_EXCHMAPS_* */
901 uint64_t xmi_isize1; /* intended file1 size */
902 uint64_t xmi_isize2; /* intended file2 size */
903 };
904
905 /* Exchange mappings between extended attribute forks instead of data forks. */
906 #define XFS_EXCHMAPS_ATTR_FORK (1ULL << 0)
907
908 /* Set the file sizes when finished. */
909 #define XFS_EXCHMAPS_SET_SIZES (1ULL << 1)
910
911 /*
912 * Exchange the mappings of the two files only if the file allocation units
913 * mapped to file1's range have been written.
914 */
915 #define XFS_EXCHMAPS_INO1_WRITTEN (1ULL << 2)
916
917 /* Clear the reflink flag from inode1 after the operation. */
918 #define XFS_EXCHMAPS_CLEAR_INO1_REFLINK (1ULL << 3)
919
920 /* Clear the reflink flag from inode2 after the operation. */
921 #define XFS_EXCHMAPS_CLEAR_INO2_REFLINK (1ULL << 4)
922
923 #define XFS_EXCHMAPS_LOGGED_FLAGS (XFS_EXCHMAPS_ATTR_FORK | \
924 XFS_EXCHMAPS_SET_SIZES | \
925 XFS_EXCHMAPS_INO1_WRITTEN | \
926 XFS_EXCHMAPS_CLEAR_INO1_REFLINK | \
927 XFS_EXCHMAPS_CLEAR_INO2_REFLINK)
928
929 /* This is the structure used to lay out an mapping exchange done log item. */
930 struct xfs_xmd_log_format {
931 uint16_t xmd_type; /* xmd log item type */
932 uint16_t xmd_size; /* size of this item */
933 uint32_t __pad;
934 uint64_t xmd_xmi_id; /* id of corresponding xmi */
935 };
936
937 /*
938 * Dquot Log format definitions.
939 *
940 * The first two fields must be the type and size fitting into
941 * 32 bits : log_recovery code assumes that.
942 */
943 struct xfs_dq_logformat {
944 uint16_t qlf_type; /* dquot log item type */
945 uint16_t qlf_size; /* size of this item */
946 xfs_dqid_t qlf_id; /* usr/grp/proj id : 32 bits */
947 int64_t qlf_blkno; /* blkno of dquot buffer */
948 int32_t qlf_len; /* len of dquot buffer */
949 uint32_t qlf_boffset; /* off of dquot in buffer */
950 };
951
952 /*
953 * log format struct for QUOTAOFF records.
954 * The first two fields must be the type and size fitting into
955 * 32 bits : log_recovery code assumes that.
956 * We write two LI_QUOTAOFF logitems per quotaoff, the last one keeps a pointer
957 * to the first and ensures that the first logitem is taken out of the AIL
958 * only when the last one is securely committed.
959 */
960 struct xfs_qoff_logformat {
961 unsigned short qf_type; /* quotaoff log item type */
962 unsigned short qf_size; /* size of this item */
963 unsigned int qf_flags; /* USR and/or GRP */
964 char qf_pad[12]; /* padding for future */
965 };
966
967 /*
968 * Disk quotas status in m_qflags, and also sb_qflags. 16 bits.
969 */
970 #define XFS_UQUOTA_ACCT 0x0001 /* user quota accounting ON */
971 #define XFS_UQUOTA_ENFD 0x0002 /* user quota limits enforced */
972 #define XFS_UQUOTA_CHKD 0x0004 /* quotacheck run on usr quotas */
973 #define XFS_PQUOTA_ACCT 0x0008 /* project quota accounting ON */
974 #define XFS_OQUOTA_ENFD 0x0010 /* other (grp/prj) quota limits enforced */
975 #define XFS_OQUOTA_CHKD 0x0020 /* quotacheck run on other (grp/prj) quotas */
976 #define XFS_GQUOTA_ACCT 0x0040 /* group quota accounting ON */
977
978 /*
979 * Conversion to and from the combined OQUOTA flag (if necessary)
980 * is done only in xfs_sb_qflags_to_disk() and xfs_sb_qflags_from_disk()
981 */
982 #define XFS_GQUOTA_ENFD 0x0080 /* group quota limits enforced */
983 #define XFS_GQUOTA_CHKD 0x0100 /* quotacheck run on group quotas */
984 #define XFS_PQUOTA_ENFD 0x0200 /* project quota limits enforced */
985 #define XFS_PQUOTA_CHKD 0x0400 /* quotacheck run on project quotas */
986
987 #define XFS_ALL_QUOTA_ACCT \
988 (XFS_UQUOTA_ACCT | XFS_GQUOTA_ACCT | XFS_PQUOTA_ACCT)
989 #define XFS_ALL_QUOTA_ENFD \
990 (XFS_UQUOTA_ENFD | XFS_GQUOTA_ENFD | XFS_PQUOTA_ENFD)
991 #define XFS_ALL_QUOTA_CHKD \
992 (XFS_UQUOTA_CHKD | XFS_GQUOTA_CHKD | XFS_PQUOTA_CHKD)
993
994 #define XFS_MOUNT_QUOTA_ALL (XFS_UQUOTA_ACCT|XFS_UQUOTA_ENFD|\
995 XFS_UQUOTA_CHKD|XFS_GQUOTA_ACCT|\
996 XFS_GQUOTA_ENFD|XFS_GQUOTA_CHKD|\
997 XFS_PQUOTA_ACCT|XFS_PQUOTA_ENFD|\
998 XFS_PQUOTA_CHKD)
999
1000 /*
1001 * Inode create log item structure
1002 *
1003 * Log recovery assumes the first two entries are the type and size and they fit
1004 * in 32 bits. Also in host order (ugh) so they have to be 32 bit aligned so
1005 * decoding can be done correctly.
1006 */
1007 struct xfs_icreate_log {
1008 uint16_t icl_type; /* type of log format structure */
1009 uint16_t icl_size; /* size of log format structure */
1010 __be32 icl_ag; /* ag being allocated in */
1011 __be32 icl_agbno; /* start block of inode range */
1012 __be32 icl_count; /* number of inodes to initialise */
1013 __be32 icl_isize; /* size of inodes */
1014 __be32 icl_length; /* length of extent to initialise */
1015 __be32 icl_gen; /* inode generation number to use */
1016 };
1017
1018 /*
1019 * Flags for deferred attribute operations.
1020 * Upper bits are flags, lower byte is type code
1021 */
1022 #define XFS_ATTRI_OP_FLAGS_SET 1 /* Set the attribute */
1023 #define XFS_ATTRI_OP_FLAGS_REMOVE 2 /* Remove the attribute */
1024 #define XFS_ATTRI_OP_FLAGS_REPLACE 3 /* Replace the attribute */
1025 #define XFS_ATTRI_OP_FLAGS_PPTR_SET 4 /* Set parent pointer */
1026 #define XFS_ATTRI_OP_FLAGS_PPTR_REMOVE 5 /* Remove parent pointer */
1027 #define XFS_ATTRI_OP_FLAGS_PPTR_REPLACE 6 /* Replace parent pointer */
1028 #define XFS_ATTRI_OP_FLAGS_TYPE_MASK 0xFF /* Flags type mask */
1029
1030 /*
1031 * alfi_attr_filter captures the state of xfs_da_args.attr_filter, so it should
1032 * never have any other bits set.
1033 */
1034 #define XFS_ATTRI_FILTER_MASK (XFS_ATTR_ROOT | \
1035 XFS_ATTR_SECURE | \
1036 XFS_ATTR_PARENT | \
1037 XFS_ATTR_INCOMPLETE)
1038
1039 /*
1040 * This is the structure used to lay out an attr log item in the
1041 * log.
1042 */
1043 struct xfs_attri_log_format {
1044 uint16_t alfi_type; /* attri log item type */
1045 uint16_t alfi_size; /* size of this item */
1046 uint32_t alfi_igen; /* generation of alfi_ino for pptr ops */
1047 uint64_t alfi_id; /* attri identifier */
1048 uint64_t alfi_ino; /* the inode for this attr operation */
1049 uint32_t alfi_op_flags; /* marks the op as a set or remove */
1050 union {
1051 uint32_t alfi_name_len; /* attr name length */
1052 struct {
1053 /*
1054 * For PPTR_REPLACE, these are the lengths of the old
1055 * and new attr names. The new and old values must
1056 * have the same length.
1057 */
1058 uint16_t alfi_old_name_len;
1059 uint16_t alfi_new_name_len;
1060 };
1061 };
1062 uint32_t alfi_value_len; /* attr value length */
1063 uint32_t alfi_attr_filter;/* attr filter flags */
1064 };
1065
1066 struct xfs_attrd_log_format {
1067 uint16_t alfd_type; /* attrd log item type */
1068 uint16_t alfd_size; /* size of this item */
1069 uint32_t __pad; /* pad to 64 bit aligned */
1070 uint64_t alfd_alf_id; /* id of corresponding attri */
1071 };
1072
1073 #endif /* __XFS_LOG_FORMAT_H__ */
1074