1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * ocfs2_fs.h
5 *
6 * On-disk structures for OCFS2.
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License, version 2, as published by the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public
20 * License along with this program; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 021110-1307, USA.
23 */
24
25 #ifndef _OCFS2_FS_H
26 #define _OCFS2_FS_H
27
28 #include <linux/magic.h>
29
30 /* Version */
31 #define OCFS2_MAJOR_REV_LEVEL 0
32 #define OCFS2_MINOR_REV_LEVEL 90
33
34 /*
35 * An OCFS2 volume starts this way:
36 * Sector 0: Valid ocfs1_vol_disk_hdr that cleanly fails to mount OCFS.
37 * Sector 1: Valid ocfs1_vol_label that cleanly fails to mount OCFS.
38 * Block OCFS2_SUPER_BLOCK_BLKNO: OCFS2 superblock.
39 *
40 * All other structures are found from the superblock information.
41 *
42 * OCFS2_SUPER_BLOCK_BLKNO is in blocks, not sectors. eg, for a
43 * blocksize of 2K, it is 4096 bytes into disk.
44 */
45 #define OCFS2_SUPER_BLOCK_BLKNO 2
46
47 /*
48 * Cluster size limits. The maximum is kept arbitrarily at 1 MB, and could
49 * grow if needed.
50 */
51 #define OCFS2_MIN_CLUSTERSIZE 4096
52 #define OCFS2_MAX_CLUSTERSIZE 1048576
53
54 /*
55 * Blocks cannot be bigger than clusters, so the maximum blocksize is the
56 * minimum cluster size.
57 */
58 #define OCFS2_MIN_BLOCKSIZE 512
59 #define OCFS2_MAX_BLOCKSIZE OCFS2_MIN_CLUSTERSIZE
60
61 /* Object signatures */
62 #define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2"
63 #define OCFS2_INODE_SIGNATURE "INODE01"
64 #define OCFS2_EXTENT_BLOCK_SIGNATURE "EXBLK01"
65 #define OCFS2_GROUP_DESC_SIGNATURE "GROUP01"
66 #define OCFS2_XATTR_BLOCK_SIGNATURE "XATTR01"
67 #define OCFS2_DIR_TRAILER_SIGNATURE "DIRTRL1"
68 #define OCFS2_DX_ROOT_SIGNATURE "DXDIR01"
69 #define OCFS2_DX_LEAF_SIGNATURE "DXLEAF1"
70 #define OCFS2_REFCOUNT_BLOCK_SIGNATURE "REFCNT1"
71
72 /* Compatibility flags */
73 #define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \
74 ( OCFS2_SB(sb)->s_feature_compat & (mask) )
75 #define OCFS2_HAS_RO_COMPAT_FEATURE(sb,mask) \
76 ( OCFS2_SB(sb)->s_feature_ro_compat & (mask) )
77 #define OCFS2_HAS_INCOMPAT_FEATURE(sb,mask) \
78 ( OCFS2_SB(sb)->s_feature_incompat & (mask) )
79 #define OCFS2_SET_COMPAT_FEATURE(sb,mask) \
80 OCFS2_SB(sb)->s_feature_compat |= (mask)
81 #define OCFS2_SET_RO_COMPAT_FEATURE(sb,mask) \
82 OCFS2_SB(sb)->s_feature_ro_compat |= (mask)
83 #define OCFS2_SET_INCOMPAT_FEATURE(sb,mask) \
84 OCFS2_SB(sb)->s_feature_incompat |= (mask)
85 #define OCFS2_CLEAR_COMPAT_FEATURE(sb,mask) \
86 OCFS2_SB(sb)->s_feature_compat &= ~(mask)
87 #define OCFS2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
88 OCFS2_SB(sb)->s_feature_ro_compat &= ~(mask)
89 #define OCFS2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
90 OCFS2_SB(sb)->s_feature_incompat &= ~(mask)
91
92 #define OCFS2_FEATURE_COMPAT_SUPP (OCFS2_FEATURE_COMPAT_BACKUP_SB \
93 | OCFS2_FEATURE_COMPAT_JBD2_SB)
94 #define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \
95 | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC \
96 | OCFS2_FEATURE_INCOMPAT_INLINE_DATA \
97 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP \
98 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK \
99 | OCFS2_FEATURE_INCOMPAT_XATTR \
100 | OCFS2_FEATURE_INCOMPAT_META_ECC \
101 | OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS \
102 | OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE \
103 | OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG \
104 | OCFS2_FEATURE_INCOMPAT_CLUSTERINFO \
105 | OCFS2_FEATURE_INCOMPAT_APPEND_DIO)
106 #define OCFS2_FEATURE_RO_COMPAT_SUPP (OCFS2_FEATURE_RO_COMPAT_UNWRITTEN \
107 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA \
108 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
109
110 /*
111 * Heartbeat-only devices are missing journals and other files. The
112 * filesystem driver can't load them, but the library can. Never put
113 * this in OCFS2_FEATURE_INCOMPAT_SUPP, *ever*.
114 */
115 #define OCFS2_FEATURE_INCOMPAT_HEARTBEAT_DEV 0x0002
116
117 /*
118 * tunefs sets this incompat flag before starting the resize and clears it
119 * at the end. This flag protects users from inadvertently mounting the fs
120 * after an aborted run without fsck-ing.
121 */
122 #define OCFS2_FEATURE_INCOMPAT_RESIZE_INPROG 0x0004
123
124 /* Used to denote a non-clustered volume */
125 #define OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT 0x0008
126
127 /* Support for sparse allocation in b-trees */
128 #define OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC 0x0010
129
130 /*
131 * Tunefs sets this incompat flag before starting an operation which
132 * would require cleanup on abort. This is done to protect users from
133 * inadvertently mounting the fs after an aborted run without
134 * fsck-ing.
135 *
136 * s_tunefs_flags on the super block describes precisely which
137 * operations were in progress.
138 */
139 #define OCFS2_FEATURE_INCOMPAT_TUNEFS_INPROG 0x0020
140
141 /* Support for data packed into inode blocks */
142 #define OCFS2_FEATURE_INCOMPAT_INLINE_DATA 0x0040
143
144 /*
145 * Support for alternate, userspace cluster stacks. If set, the superblock
146 * field s_cluster_info contains a tag for the alternate stack in use as
147 * well as the name of the cluster being joined.
148 * mount.ocfs2 must pass in a matching stack name.
149 *
150 * If not set, the classic stack will be used. This is compatbile with
151 * all older versions.
152 */
153 #define OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK 0x0080
154
155 /* Support for the extended slot map */
156 #define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100
157
158 /* Support for extended attributes */
159 #define OCFS2_FEATURE_INCOMPAT_XATTR 0x0200
160
161 /* Support for indexed directores */
162 #define OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS 0x0400
163
164 /* Metadata checksum and error correction */
165 #define OCFS2_FEATURE_INCOMPAT_META_ECC 0x0800
166
167 /* Refcount tree support */
168 #define OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE 0x1000
169
170 /* Discontiguous block groups */
171 #define OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG 0x2000
172
173 /*
174 * Incompat bit to indicate useable clusterinfo with stackflags for all
175 * cluster stacks (userspace adnd o2cb). If this bit is set,
176 * INCOMPAT_USERSPACE_STACK becomes superfluous and thus should not be set.
177 */
178 #define OCFS2_FEATURE_INCOMPAT_CLUSTERINFO 0x4000
179
180 /*
181 * Append Direct IO support
182 */
183 #define OCFS2_FEATURE_INCOMPAT_APPEND_DIO 0x8000
184
185 /*
186 * backup superblock flag is used to indicate that this volume
187 * has backup superblocks.
188 */
189 #define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001
190
191 /*
192 * The filesystem will correctly handle journal feature bits.
193 */
194 #define OCFS2_FEATURE_COMPAT_JBD2_SB 0x0002
195
196 /*
197 * Unwritten extents support.
198 */
199 #define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN 0x0001
200
201 /*
202 * Maintain quota information for this filesystem
203 */
204 #define OCFS2_FEATURE_RO_COMPAT_USRQUOTA 0x0002
205 #define OCFS2_FEATURE_RO_COMPAT_GRPQUOTA 0x0004
206
207
208 /* The byte offset of the first backup block will be 1G.
209 * The following will be 4G, 16G, 64G, 256G and 1T.
210 */
211 #define OCFS2_BACKUP_SB_START 1 << 30
212
213 /* the max backup superblock nums */
214 #define OCFS2_MAX_BACKUP_SUPERBLOCKS 6
215
216 /*
217 * Flags on ocfs2_super_block.s_tunefs_flags
218 */
219 #define OCFS2_TUNEFS_INPROG_REMOVE_SLOT 0x0001 /* Removing slots */
220
221 /*
222 * Flags on ocfs2_dinode.i_flags
223 */
224 #define OCFS2_VALID_FL (0x00000001) /* Inode is valid */
225 #define OCFS2_UNUSED2_FL (0x00000002)
226 #define OCFS2_ORPHANED_FL (0x00000004) /* On the orphan list */
227 #define OCFS2_UNUSED3_FL (0x00000008)
228 /* System inode flags */
229 #define OCFS2_SYSTEM_FL (0x00000010) /* System inode */
230 #define OCFS2_SUPER_BLOCK_FL (0x00000020) /* Super block */
231 #define OCFS2_LOCAL_ALLOC_FL (0x00000040) /* Slot local alloc bitmap */
232 #define OCFS2_BITMAP_FL (0x00000080) /* Allocation bitmap */
233 #define OCFS2_JOURNAL_FL (0x00000100) /* Slot local journal */
234 #define OCFS2_HEARTBEAT_FL (0x00000200) /* Heartbeat area */
235 #define OCFS2_CHAIN_FL (0x00000400) /* Chain allocator */
236 #define OCFS2_DEALLOC_FL (0x00000800) /* Truncate log */
237 #define OCFS2_QUOTA_FL (0x00001000) /* Quota file */
238 #define OCFS2_DIO_ORPHANED_FL (0X00002000) /* On the orphan list especially
239 * for dio */
240
241 /*
242 * Flags on ocfs2_dinode.i_dyn_features
243 *
244 * These can change much more often than i_flags. When adding flags,
245 * keep in mind that i_dyn_features is only 16 bits wide.
246 */
247 #define OCFS2_INLINE_DATA_FL (0x0001) /* Data stored in inode block */
248 #define OCFS2_HAS_XATTR_FL (0x0002)
249 #define OCFS2_INLINE_XATTR_FL (0x0004)
250 #define OCFS2_INDEXED_DIR_FL (0x0008)
251 #define OCFS2_HAS_REFCOUNT_FL (0x0010)
252
253 /* Inode attributes, keep in sync with EXT2 */
254 #define OCFS2_SECRM_FL FS_SECRM_FL /* Secure deletion */
255 #define OCFS2_UNRM_FL FS_UNRM_FL /* Undelete */
256 #define OCFS2_COMPR_FL FS_COMPR_FL /* Compress file */
257 #define OCFS2_SYNC_FL FS_SYNC_FL /* Synchronous updates */
258 #define OCFS2_IMMUTABLE_FL FS_IMMUTABLE_FL /* Immutable file */
259 #define OCFS2_APPEND_FL FS_APPEND_FL /* writes to file may only append */
260 #define OCFS2_NODUMP_FL FS_NODUMP_FL /* do not dump file */
261 #define OCFS2_NOATIME_FL FS_NOATIME_FL /* do not update atime */
262 /* Reserved for compression usage... */
263 #define OCFS2_DIRTY_FL FS_DIRTY_FL
264 #define OCFS2_COMPRBLK_FL FS_COMPRBLK_FL /* One or more compressed clusters */
265 #define OCFS2_NOCOMP_FL FS_NOCOMP_FL /* Don't compress */
266 #define OCFS2_ECOMPR_FL FS_ECOMPR_FL /* Compression error */
267 /* End compression flags --- maybe not all used */
268 #define OCFS2_BTREE_FL FS_BTREE_FL /* btree format dir */
269 #define OCFS2_INDEX_FL FS_INDEX_FL /* hash-indexed directory */
270 #define OCFS2_IMAGIC_FL FS_IMAGIC_FL /* AFS directory */
271 #define OCFS2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL /* Reserved for ext3 */
272 #define OCFS2_NOTAIL_FL FS_NOTAIL_FL /* file tail should not be merged */
273 #define OCFS2_DIRSYNC_FL FS_DIRSYNC_FL /* dirsync behaviour (directories only) */
274 #define OCFS2_TOPDIR_FL FS_TOPDIR_FL /* Top of directory hierarchies*/
275 #define OCFS2_RESERVED_FL FS_RESERVED_FL /* reserved for ext2 lib */
276
277 #define OCFS2_FL_VISIBLE FS_FL_USER_VISIBLE /* User visible flags */
278 #define OCFS2_FL_MODIFIABLE FS_FL_USER_MODIFIABLE /* User modifiable flags */
279
280 /*
281 * Extent record flags (e_node.leaf.flags)
282 */
283 #define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but
284 * unwritten */
285 #define OCFS2_EXT_REFCOUNTED (0x02) /* Extent is reference
286 * counted in an associated
287 * refcount tree */
288
289 /*
290 * Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
291 */
292 #define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */
293
294 /*
295 * superblock s_state flags
296 */
297 #define OCFS2_ERROR_FS (0x00000001) /* FS saw errors */
298
299 /* Limit of space in ocfs2_dir_entry */
300 #define OCFS2_MAX_FILENAME_LEN 255
301
302 /* Maximum slots on an ocfs2 file system */
303 #define OCFS2_MAX_SLOTS 255
304
305 /* Slot map indicator for an empty slot */
306 #define OCFS2_INVALID_SLOT -1
307
308 #define OCFS2_VOL_UUID_LEN 16
309 #define OCFS2_MAX_VOL_LABEL_LEN 64
310
311 /* The cluster stack fields */
312 #define OCFS2_STACK_LABEL_LEN 4
313 #define OCFS2_CLUSTER_NAME_LEN 16
314
315 /* Classic (historically speaking) cluster stack */
316 #define OCFS2_CLASSIC_CLUSTER_STACK "o2cb"
317
318 /* Journal limits (in bytes) */
319 #define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024)
320
321 /*
322 * Inline extended attribute size (in bytes)
323 * The value chosen should be aligned to 16 byte boundaries.
324 */
325 #define OCFS2_MIN_XATTR_INLINE_SIZE 256
326
327 /*
328 * Cluster info flags (ocfs2_cluster_info.ci_stackflags)
329 */
330 #define OCFS2_CLUSTER_O2CB_GLOBAL_HEARTBEAT (0x01)
331
332 struct ocfs2_system_inode_info {
333 char *si_name;
334 int si_iflags;
335 int si_mode;
336 };
337
338 /* System file index */
339 enum {
340 BAD_BLOCK_SYSTEM_INODE = 0,
341 GLOBAL_INODE_ALLOC_SYSTEM_INODE,
342 SLOT_MAP_SYSTEM_INODE,
343 #define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE
344 HEARTBEAT_SYSTEM_INODE,
345 GLOBAL_BITMAP_SYSTEM_INODE,
346 USER_QUOTA_SYSTEM_INODE,
347 GROUP_QUOTA_SYSTEM_INODE,
348 #define OCFS2_LAST_GLOBAL_SYSTEM_INODE GROUP_QUOTA_SYSTEM_INODE
349 #define OCFS2_FIRST_LOCAL_SYSTEM_INODE ORPHAN_DIR_SYSTEM_INODE
350 ORPHAN_DIR_SYSTEM_INODE,
351 EXTENT_ALLOC_SYSTEM_INODE,
352 INODE_ALLOC_SYSTEM_INODE,
353 JOURNAL_SYSTEM_INODE,
354 LOCAL_ALLOC_SYSTEM_INODE,
355 TRUNCATE_LOG_SYSTEM_INODE,
356 LOCAL_USER_QUOTA_SYSTEM_INODE,
357 LOCAL_GROUP_QUOTA_SYSTEM_INODE,
358 #define OCFS2_LAST_LOCAL_SYSTEM_INODE LOCAL_GROUP_QUOTA_SYSTEM_INODE
359 NUM_SYSTEM_INODES
360 };
361 #define NUM_GLOBAL_SYSTEM_INODES OCFS2_FIRST_LOCAL_SYSTEM_INODE
362 #define NUM_LOCAL_SYSTEM_INODES \
363 (NUM_SYSTEM_INODES - OCFS2_FIRST_LOCAL_SYSTEM_INODE)
364
365 static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = {
366 /* Global system inodes (single copy) */
367 /* The first two are only used from userspace mfks/tunefs */
368 [BAD_BLOCK_SYSTEM_INODE] = { "bad_blocks", 0, S_IFREG | 0644 },
369 [GLOBAL_INODE_ALLOC_SYSTEM_INODE] = { "global_inode_alloc", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
370
371 /* These are used by the running filesystem */
372 [SLOT_MAP_SYSTEM_INODE] = { "slot_map", 0, S_IFREG | 0644 },
373 [HEARTBEAT_SYSTEM_INODE] = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 },
374 [GLOBAL_BITMAP_SYSTEM_INODE] = { "global_bitmap", 0, S_IFREG | 0644 },
375 [USER_QUOTA_SYSTEM_INODE] = { "aquota.user", OCFS2_QUOTA_FL, S_IFREG | 0644 },
376 [GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group", OCFS2_QUOTA_FL, S_IFREG | 0644 },
377
378 /* Slot-specific system inodes (one copy per slot) */
379 [ORPHAN_DIR_SYSTEM_INODE] = { "orphan_dir:%04d", 0, S_IFDIR | 0755 },
380 [EXTENT_ALLOC_SYSTEM_INODE] = { "extent_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
381 [INODE_ALLOC_SYSTEM_INODE] = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
382 [JOURNAL_SYSTEM_INODE] = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 },
383 [LOCAL_ALLOC_SYSTEM_INODE] = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 },
384 [TRUNCATE_LOG_SYSTEM_INODE] = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 },
385 [LOCAL_USER_QUOTA_SYSTEM_INODE] = { "aquota.user:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 },
386 [LOCAL_GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 },
387 };
388
389 /* Parameter passed from mount.ocfs2 to module */
390 #define OCFS2_HB_NONE "heartbeat=none"
391 #define OCFS2_HB_LOCAL "heartbeat=local"
392 #define OCFS2_HB_GLOBAL "heartbeat=global"
393
394 /*
395 * OCFS2 directory file types. Only the low 3 bits are used. The
396 * other bits are reserved for now.
397 */
398 #define OCFS2_FT_UNKNOWN 0
399 #define OCFS2_FT_REG_FILE 1
400 #define OCFS2_FT_DIR 2
401 #define OCFS2_FT_CHRDEV 3
402 #define OCFS2_FT_BLKDEV 4
403 #define OCFS2_FT_FIFO 5
404 #define OCFS2_FT_SOCK 6
405 #define OCFS2_FT_SYMLINK 7
406
407 #define OCFS2_FT_MAX 8
408
409 /*
410 * OCFS2_DIR_PAD defines the directory entries boundaries
411 *
412 * NOTE: It must be a multiple of 4
413 */
414 #define OCFS2_DIR_PAD 4
415 #define OCFS2_DIR_ROUND (OCFS2_DIR_PAD - 1)
416 #define OCFS2_DIR_MEMBER_LEN offsetof(struct ocfs2_dir_entry, name)
417 #define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \
418 OCFS2_DIR_ROUND) & \
419 ~OCFS2_DIR_ROUND)
420 #define OCFS2_DIR_MIN_REC_LEN OCFS2_DIR_REC_LEN(1)
421
422 #define OCFS2_LINK_MAX 32000
423 #define OCFS2_DX_LINK_MAX ((1U << 31) - 1U)
424 #define OCFS2_LINKS_HI_SHIFT 16
425 #define OCFS2_DX_ENTRIES_MAX (0xffffffffU)
426
427 #define S_SHIFT 12
428 static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = {
429 [S_IFREG >> S_SHIFT] = OCFS2_FT_REG_FILE,
430 [S_IFDIR >> S_SHIFT] = OCFS2_FT_DIR,
431 [S_IFCHR >> S_SHIFT] = OCFS2_FT_CHRDEV,
432 [S_IFBLK >> S_SHIFT] = OCFS2_FT_BLKDEV,
433 [S_IFIFO >> S_SHIFT] = OCFS2_FT_FIFO,
434 [S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK,
435 [S_IFLNK >> S_SHIFT] = OCFS2_FT_SYMLINK,
436 };
437
438
439 /*
440 * Convenience casts
441 */
442 #define OCFS2_RAW_SB(dinode) (&((dinode)->id2.i_super))
443
444 /*
445 * Block checking structure. This is used in metadata to validate the
446 * contents. If OCFS2_FEATURE_INCOMPAT_META_ECC is not set, it is all
447 * zeros.
448 */
449 struct ocfs2_block_check {
450 /*00*/ __le32 bc_crc32e; /* 802.3 Ethernet II CRC32 */
451 __le16 bc_ecc; /* Single-error-correction parity vector.
452 This is a simple Hamming code dependent
453 on the blocksize. OCFS2's maximum
454 blocksize, 4K, requires 16 parity bits,
455 so we fit in __le16. */
456 __le16 bc_reserved1;
457 /*08*/
458 };
459
460 /*
461 * On disk extent record for OCFS2
462 * It describes a range of clusters on disk.
463 *
464 * Length fields are divided into interior and leaf node versions.
465 * This leaves room for a flags field (OCFS2_EXT_*) in the leaf nodes.
466 */
467 struct ocfs2_extent_rec {
468 /*00*/ __le32 e_cpos; /* Offset into the file, in clusters */
469 union {
470 __le32 e_int_clusters; /* Clusters covered by all children */
471 struct {
472 __le16 e_leaf_clusters; /* Clusters covered by this
473 extent */
474 __u8 e_reserved1;
475 __u8 e_flags; /* Extent flags */
476 };
477 };
478 __le64 e_blkno; /* Physical disk offset, in blocks */
479 /*10*/
480 };
481
482 struct ocfs2_chain_rec {
483 __le32 c_free; /* Number of free bits in this chain. */
484 __le32 c_total; /* Number of total bits in this chain */
485 __le64 c_blkno; /* Physical disk offset (blocks) of 1st group */
486 };
487
488 struct ocfs2_truncate_rec {
489 __le32 t_start; /* 1st cluster in this log */
490 __le32 t_clusters; /* Number of total clusters covered */
491 };
492
493 /*
494 * On disk extent list for OCFS2 (node in the tree). Note that this
495 * is contained inside ocfs2_dinode or ocfs2_extent_block, so the
496 * offsets are relative to ocfs2_dinode.id2.i_list or
497 * ocfs2_extent_block.h_list, respectively.
498 */
499 struct ocfs2_extent_list {
500 /*00*/ __le16 l_tree_depth; /* Extent tree depth from this
501 point. 0 means data extents
502 hang directly off this
503 header (a leaf)
504 NOTE: The high 8 bits cannot be
505 used - tree_depth is never that big.
506 */
507 __le16 l_count; /* Number of extent records */
508 __le16 l_next_free_rec; /* Next unused extent slot */
509 __le16 l_reserved1;
510 __le64 l_reserved2; /* Pad to
511 sizeof(ocfs2_extent_rec) */
512 /*10*/ struct ocfs2_extent_rec l_recs[0]; /* Extent records */
513 };
514
515 /*
516 * On disk allocation chain list for OCFS2. Note that this is
517 * contained inside ocfs2_dinode, so the offsets are relative to
518 * ocfs2_dinode.id2.i_chain.
519 */
520 struct ocfs2_chain_list {
521 /*00*/ __le16 cl_cpg; /* Clusters per Block Group */
522 __le16 cl_bpc; /* Bits per cluster */
523 __le16 cl_count; /* Total chains in this list */
524 __le16 cl_next_free_rec; /* Next unused chain slot */
525 __le64 cl_reserved1;
526 /*10*/ struct ocfs2_chain_rec cl_recs[0]; /* Chain records */
527 };
528
529 /*
530 * On disk deallocation log for OCFS2. Note that this is
531 * contained inside ocfs2_dinode, so the offsets are relative to
532 * ocfs2_dinode.id2.i_dealloc.
533 */
534 struct ocfs2_truncate_log {
535 /*00*/ __le16 tl_count; /* Total records in this log */
536 __le16 tl_used; /* Number of records in use */
537 __le32 tl_reserved1;
538 /*08*/ struct ocfs2_truncate_rec tl_recs[0]; /* Truncate records */
539 };
540
541 /*
542 * On disk extent block (indirect block) for OCFS2
543 */
544 struct ocfs2_extent_block
545 {
546 /*00*/ __u8 h_signature[8]; /* Signature for verification */
547 struct ocfs2_block_check h_check; /* Error checking */
548 /*10*/ __le16 h_suballoc_slot; /* Slot suballocator this
549 extent_header belongs to */
550 __le16 h_suballoc_bit; /* Bit offset in suballocator
551 block group */
552 __le32 h_fs_generation; /* Must match super block */
553 __le64 h_blkno; /* Offset on disk, in blocks */
554 /*20*/ __le64 h_suballoc_loc; /* Suballocator block group this
555 eb belongs to. Only valid
556 if allocated from a
557 discontiguous block group */
558 __le64 h_next_leaf_blk; /* Offset on disk, in blocks,
559 of next leaf header pointing
560 to data */
561 /*30*/ struct ocfs2_extent_list h_list; /* Extent record list */
562 /* Actual on-disk size is one block */
563 };
564
565 /*
566 * On disk slot map for OCFS2. This defines the contents of the "slot_map"
567 * system file. A slot is valid if it contains a node number >= 0. The
568 * value -1 (0xFFFF) is OCFS2_INVALID_SLOT. This marks a slot empty.
569 */
570 struct ocfs2_slot_map {
571 /*00*/ __le16 sm_slots[0];
572 /*
573 * Actual on-disk size is one block. OCFS2_MAX_SLOTS is 255,
574 * 255 * sizeof(__le16) == 512B, within the 512B block minimum blocksize.
575 */
576 };
577
578 struct ocfs2_extended_slot {
579 /*00*/ __u8 es_valid;
580 __u8 es_reserved1[3];
581 __le32 es_node_num;
582 /*08*/
583 };
584
585 /*
586 * The extended slot map, used when OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP
587 * is set. It separates out the valid marker from the node number, and
588 * has room to grow. Unlike the old slot map, this format is defined by
589 * i_size.
590 */
591 struct ocfs2_slot_map_extended {
592 /*00*/ struct ocfs2_extended_slot se_slots[0];
593 /*
594 * Actual size is i_size of the slot_map system file. It should
595 * match s_max_slots * sizeof(struct ocfs2_extended_slot)
596 */
597 };
598
599 /*
600 * ci_stackflags is only valid if the incompat bit
601 * OCFS2_FEATURE_INCOMPAT_CLUSTERINFO is set.
602 */
603 struct ocfs2_cluster_info {
604 /*00*/ __u8 ci_stack[OCFS2_STACK_LABEL_LEN];
605 union {
606 __le32 ci_reserved;
607 struct {
608 __u8 ci_stackflags;
609 __u8 ci_reserved1;
610 __u8 ci_reserved2;
611 __u8 ci_reserved3;
612 };
613 };
614 /*08*/ __u8 ci_cluster[OCFS2_CLUSTER_NAME_LEN];
615 /*18*/
616 };
617
618 /*
619 * On disk superblock for OCFS2
620 * Note that it is contained inside an ocfs2_dinode, so all offsets
621 * are relative to the start of ocfs2_dinode.id2.
622 */
623 struct ocfs2_super_block {
624 /*00*/ __le16 s_major_rev_level;
625 __le16 s_minor_rev_level;
626 __le16 s_mnt_count;
627 __le16 s_max_mnt_count;
628 __le16 s_state; /* File system state */
629 __le16 s_errors; /* Behaviour when detecting errors */
630 __le32 s_checkinterval; /* Max time between checks */
631 /*10*/ __le64 s_lastcheck; /* Time of last check */
632 __le32 s_creator_os; /* OS */
633 __le32 s_feature_compat; /* Compatible feature set */
634 /*20*/ __le32 s_feature_incompat; /* Incompatible feature set */
635 __le32 s_feature_ro_compat; /* Readonly-compatible feature set */
636 __le64 s_root_blkno; /* Offset, in blocks, of root directory
637 dinode */
638 /*30*/ __le64 s_system_dir_blkno; /* Offset, in blocks, of system
639 directory dinode */
640 __le32 s_blocksize_bits; /* Blocksize for this fs */
641 __le32 s_clustersize_bits; /* Clustersize for this fs */
642 /*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts
643 before tunefs required */
644 __le16 s_tunefs_flag;
645 __le32 s_uuid_hash; /* hash value of uuid */
646 __le64 s_first_cluster_group; /* Block offset of 1st cluster
647 * group header */
648 /*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
649 /*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */
650 /*A0*/ struct ocfs2_cluster_info s_cluster_info; /* Only valid if either
651 userspace or clusterinfo
652 INCOMPAT flag set. */
653 /*B8*/ __le16 s_xattr_inline_size; /* extended attribute inline size
654 for this fs*/
655 __le16 s_reserved0;
656 __le32 s_dx_seed[3]; /* seed[0-2] for dx dir hash.
657 * s_uuid_hash serves as seed[3]. */
658 /*C0*/ __le64 s_reserved2[15]; /* Fill out superblock */
659 /*140*/
660
661 /*
662 * NOTE: As stated above, all offsets are relative to
663 * ocfs2_dinode.id2, which is at 0xC0 in the inode.
664 * 0xC0 + 0x140 = 0x200 or 512 bytes. A superblock must fit within
665 * our smallest blocksize, which is 512 bytes. To ensure this,
666 * we reserve the space in s_reserved2. Anything past s_reserved2
667 * will not be available on the smallest blocksize.
668 */
669 };
670
671 /*
672 * Local allocation bitmap for OCFS2 slots
673 * Note that it exists inside an ocfs2_dinode, so all offsets are
674 * relative to the start of ocfs2_dinode.id2.
675 */
676 struct ocfs2_local_alloc
677 {
678 /*00*/ __le32 la_bm_off; /* Starting bit offset in main bitmap */
679 __le16 la_size; /* Size of included bitmap, in bytes */
680 __le16 la_reserved1;
681 __le64 la_reserved2;
682 /*10*/ __u8 la_bitmap[0];
683 };
684
685 /*
686 * Data-in-inode header. This is only used if i_dyn_features has
687 * OCFS2_INLINE_DATA_FL set.
688 */
689 struct ocfs2_inline_data
690 {
691 /*00*/ __le16 id_count; /* Number of bytes that can be used
692 * for data, starting at id_data */
693 __le16 id_reserved0;
694 __le32 id_reserved1;
695 __u8 id_data[0]; /* Start of user data */
696 };
697
698 /*
699 * On disk inode for OCFS2
700 */
701 struct ocfs2_dinode {
702 /*00*/ __u8 i_signature[8]; /* Signature for validation */
703 __le32 i_generation; /* Generation number */
704 __le16 i_suballoc_slot; /* Slot suballocator this inode
705 belongs to */
706 __le16 i_suballoc_bit; /* Bit offset in suballocator
707 block group */
708 /*10*/ __le16 i_links_count_hi; /* High 16 bits of links count */
709 __le16 i_xattr_inline_size;
710 __le32 i_clusters; /* Cluster count */
711 __le32 i_uid; /* Owner UID */
712 __le32 i_gid; /* Owning GID */
713 /*20*/ __le64 i_size; /* Size in bytes */
714 __le16 i_mode; /* File mode */
715 __le16 i_links_count; /* Links count */
716 __le32 i_flags; /* File flags */
717 /*30*/ __le64 i_atime; /* Access time */
718 __le64 i_ctime; /* Creation time */
719 /*40*/ __le64 i_mtime; /* Modification time */
720 __le64 i_dtime; /* Deletion time */
721 /*50*/ __le64 i_blkno; /* Offset on disk, in blocks */
722 __le64 i_last_eb_blk; /* Pointer to last extent
723 block */
724 /*60*/ __le32 i_fs_generation; /* Generation per fs-instance */
725 __le32 i_atime_nsec;
726 __le32 i_ctime_nsec;
727 __le32 i_mtime_nsec;
728 /*70*/ __le32 i_attr;
729 __le16 i_orphaned_slot; /* Only valid when OCFS2_ORPHANED_FL
730 was set in i_flags */
731 __le16 i_dyn_features;
732 __le64 i_xattr_loc;
733 /*80*/ struct ocfs2_block_check i_check; /* Error checking */
734 /*88*/ __le64 i_dx_root; /* Pointer to dir index root block */
735 /*90*/ __le64 i_refcount_loc;
736 __le64 i_suballoc_loc; /* Suballocator block group this
737 inode belongs to. Only valid
738 if allocated from a
739 discontiguous block group */
740 /*A0*/ __le16 i_dio_orphaned_slot; /* only used for append dio write */
741 __le16 i_reserved1[3];
742 __le64 i_reserved2[2];
743 /*B8*/ union {
744 __le64 i_pad1; /* Generic way to refer to this
745 64bit union */
746 struct {
747 __le64 i_rdev; /* Device number */
748 } dev1;
749 struct { /* Info for bitmap system
750 inodes */
751 __le32 i_used; /* Bits (ie, clusters) used */
752 __le32 i_total; /* Total bits (clusters)
753 available */
754 } bitmap1;
755 struct { /* Info for journal system
756 inodes */
757 __le32 ij_flags; /* Mounted, version, etc. */
758 __le32 ij_recovery_generation; /* Incremented when the
759 journal is recovered
760 after an unclean
761 shutdown */
762 } journal1;
763 } id1; /* Inode type dependent 1 */
764 /*C0*/ union {
765 struct ocfs2_super_block i_super;
766 struct ocfs2_local_alloc i_lab;
767 struct ocfs2_chain_list i_chain;
768 struct ocfs2_extent_list i_list;
769 struct ocfs2_truncate_log i_dealloc;
770 struct ocfs2_inline_data i_data;
771 __u8 i_symlink[0];
772 } id2;
773 /* Actual on-disk size is one block */
774 };
775
776 /*
777 * On-disk directory entry structure for OCFS2
778 *
779 * Packed as this structure could be accessed unaligned on 64-bit platforms
780 */
781 struct ocfs2_dir_entry {
782 /*00*/ __le64 inode; /* Inode number */
783 __le16 rec_len; /* Directory entry length */
784 __u8 name_len; /* Name length */
785 __u8 file_type;
786 /*0C*/ char name[OCFS2_MAX_FILENAME_LEN]; /* File name */
787 /* Actual on-disk length specified by rec_len */
788 } __attribute__ ((packed));
789
790 /*
791 * Per-block record for the unindexed directory btree. This is carefully
792 * crafted so that the rec_len and name_len records of an ocfs2_dir_entry are
793 * mirrored. That way, the directory manipulation code needs a minimal amount
794 * of update.
795 *
796 * NOTE: Keep this structure aligned to a multiple of 4 bytes.
797 */
798 struct ocfs2_dir_block_trailer {
799 /*00*/ __le64 db_compat_inode; /* Always zero. Was inode */
800
801 __le16 db_compat_rec_len; /* Backwards compatible with
802 * ocfs2_dir_entry. */
803 __u8 db_compat_name_len; /* Always zero. Was name_len */
804 __u8 db_reserved0;
805 __le16 db_reserved1;
806 __le16 db_free_rec_len; /* Size of largest empty hole
807 * in this block. (unused) */
808 /*10*/ __u8 db_signature[8]; /* Signature for verification */
809 __le64 db_reserved2;
810 /*20*/ __le64 db_free_next; /* Next block in list (unused) */
811 __le64 db_blkno; /* Offset on disk, in blocks */
812 /*30*/ __le64 db_parent_dinode; /* dinode which owns me, in
813 blocks */
814 struct ocfs2_block_check db_check; /* Error checking */
815 /*40*/
816 };
817
818 /*
819 * A directory entry in the indexed tree. We don't store the full name here,
820 * but instead provide a pointer to the full dirent in the unindexed tree.
821 *
822 * We also store name_len here so as to reduce the number of leaf blocks we
823 * need to search in case of collisions.
824 */
825 struct ocfs2_dx_entry {
826 __le32 dx_major_hash; /* Used to find logical
827 * cluster in index */
828 __le32 dx_minor_hash; /* Lower bits used to find
829 * block in cluster */
830 __le64 dx_dirent_blk; /* Physical block in unindexed
831 * tree holding this dirent. */
832 };
833
834 struct ocfs2_dx_entry_list {
835 __le32 de_reserved;
836 __le16 de_count; /* Maximum number of entries
837 * possible in de_entries */
838 __le16 de_num_used; /* Current number of
839 * de_entries entries */
840 struct ocfs2_dx_entry de_entries[0]; /* Indexed dir entries
841 * in a packed array of
842 * length de_num_used */
843 };
844
845 #define OCFS2_DX_FLAG_INLINE 0x01
846
847 /*
848 * A directory indexing block. Each indexed directory has one of these,
849 * pointed to by ocfs2_dinode.
850 *
851 * This block stores an indexed btree root, and a set of free space
852 * start-of-list pointers.
853 */
854 struct ocfs2_dx_root_block {
855 __u8 dr_signature[8]; /* Signature for verification */
856 struct ocfs2_block_check dr_check; /* Error checking */
857 __le16 dr_suballoc_slot; /* Slot suballocator this
858 * block belongs to. */
859 __le16 dr_suballoc_bit; /* Bit offset in suballocator
860 * block group */
861 __le32 dr_fs_generation; /* Must match super block */
862 __le64 dr_blkno; /* Offset on disk, in blocks */
863 __le64 dr_last_eb_blk; /* Pointer to last
864 * extent block */
865 __le32 dr_clusters; /* Clusters allocated
866 * to the indexed tree. */
867 __u8 dr_flags; /* OCFS2_DX_FLAG_* flags */
868 __u8 dr_reserved0;
869 __le16 dr_reserved1;
870 __le64 dr_dir_blkno; /* Pointer to parent inode */
871 __le32 dr_num_entries; /* Total number of
872 * names stored in
873 * this directory.*/
874 __le32 dr_reserved2;
875 __le64 dr_free_blk; /* Pointer to head of free
876 * unindexed block list. */
877 __le64 dr_suballoc_loc; /* Suballocator block group
878 this root belongs to.
879 Only valid if allocated
880 from a discontiguous
881 block group */
882 __le64 dr_reserved3[14];
883 union {
884 struct ocfs2_extent_list dr_list; /* Keep this aligned to 128
885 * bits for maximum space
886 * efficiency. */
887 struct ocfs2_dx_entry_list dr_entries; /* In-root-block list of
888 * entries. We grow out
889 * to extents if this
890 * gets too big. */
891 };
892 };
893
894 /*
895 * The header of a leaf block in the indexed tree.
896 */
897 struct ocfs2_dx_leaf {
898 __u8 dl_signature[8];/* Signature for verification */
899 struct ocfs2_block_check dl_check; /* Error checking */
900 __le64 dl_blkno; /* Offset on disk, in blocks */
901 __le32 dl_fs_generation;/* Must match super block */
902 __le32 dl_reserved0;
903 __le64 dl_reserved1;
904 struct ocfs2_dx_entry_list dl_list;
905 };
906
907 /*
908 * Largest bitmap for a block (suballocator) group in bytes. This limit
909 * does not affect cluster groups (global allocator). Cluster group
910 * bitmaps run to the end of the block.
911 */
912 #define OCFS2_MAX_BG_BITMAP_SIZE 256
913
914 /*
915 * On disk allocator group structure for OCFS2
916 */
917 struct ocfs2_group_desc
918 {
919 /*00*/ __u8 bg_signature[8]; /* Signature for validation */
920 __le16 bg_size; /* Size of included bitmap in
921 bytes. */
922 __le16 bg_bits; /* Bits represented by this
923 group. */
924 __le16 bg_free_bits_count; /* Free bits count */
925 __le16 bg_chain; /* What chain I am in. */
926 /*10*/ __le32 bg_generation;
927 __le32 bg_reserved1;
928 __le64 bg_next_group; /* Next group in my list, in
929 blocks */
930 /*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in
931 blocks */
932 __le64 bg_blkno; /* Offset on disk, in blocks */
933 /*30*/ struct ocfs2_block_check bg_check; /* Error checking */
934 __le64 bg_reserved2;
935 /*40*/ union {
936 __u8 bg_bitmap[0];
937 struct {
938 /*
939 * Block groups may be discontiguous when
940 * OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG is set.
941 * The extents of a discontiguous block group are
942 * stored in bg_list. It is a flat list.
943 * l_tree_depth must always be zero. A
944 * discontiguous group is signified by a non-zero
945 * bg_list->l_next_free_rec. Only block groups
946 * can be discontiguous; Cluster groups cannot.
947 * We've never made a block group with more than
948 * 2048 blocks (256 bytes of bg_bitmap). This
949 * codifies that limit so that we can fit bg_list.
950 * bg_size of a discontiguous block group will
951 * be 256 to match bg_bitmap_filler.
952 */
953 __u8 bg_bitmap_filler[OCFS2_MAX_BG_BITMAP_SIZE];
954 /*140*/ struct ocfs2_extent_list bg_list;
955 };
956 };
957 /* Actual on-disk size is one block */
958 };
959
960 struct ocfs2_refcount_rec {
961 /*00*/ __le64 r_cpos; /* Physical offset, in clusters */
962 __le32 r_clusters; /* Clusters covered by this extent */
963 __le32 r_refcount; /* Reference count of this extent */
964 /*10*/
965 };
966 #define OCFS2_32BIT_POS_MASK (0xffffffffULL)
967
968 #define OCFS2_REFCOUNT_LEAF_FL (0x00000001)
969 #define OCFS2_REFCOUNT_TREE_FL (0x00000002)
970
971 struct ocfs2_refcount_list {
972 /*00*/ __le16 rl_count; /* Maximum number of entries possible
973 in rl_records */
974 __le16 rl_used; /* Current number of used records */
975 __le32 rl_reserved2;
976 __le64 rl_reserved1; /* Pad to sizeof(ocfs2_refcount_record) */
977 /*10*/ struct ocfs2_refcount_rec rl_recs[0]; /* Refcount records */
978 };
979
980
981 struct ocfs2_refcount_block {
982 /*00*/ __u8 rf_signature[8]; /* Signature for verification */
983 __le16 rf_suballoc_slot; /* Slot suballocator this block
984 belongs to */
985 __le16 rf_suballoc_bit; /* Bit offset in suballocator
986 block group */
987 __le32 rf_fs_generation; /* Must match superblock */
988 /*10*/ __le64 rf_blkno; /* Offset on disk, in blocks */
989 __le64 rf_parent; /* Parent block, only valid if
990 OCFS2_REFCOUNT_LEAF_FL is set in
991 rf_flags */
992 /*20*/ struct ocfs2_block_check rf_check; /* Error checking */
993 __le64 rf_last_eb_blk; /* Pointer to last extent block */
994 /*30*/ __le32 rf_count; /* Number of inodes sharing this
995 refcount tree */
996 __le32 rf_flags; /* See the flags above */
997 __le32 rf_clusters; /* clusters covered by refcount tree. */
998 __le32 rf_cpos; /* cluster offset in refcount tree.*/
999 /*40*/ __le32 rf_generation; /* generation number. all be the same
1000 * for the same refcount tree. */
1001 __le32 rf_reserved0;
1002 __le64 rf_suballoc_loc; /* Suballocator block group this
1003 refcount block belongs to. Only
1004 valid if allocated from a
1005 discontiguous block group */
1006 /*50*/ __le64 rf_reserved1[6];
1007 /*80*/ union {
1008 struct ocfs2_refcount_list rf_records; /* List of refcount
1009 records */
1010 struct ocfs2_extent_list rf_list; /* Extent record list,
1011 only valid if
1012 OCFS2_REFCOUNT_TREE_FL
1013 is set in rf_flags */
1014 };
1015 /* Actual on-disk size is one block */
1016 };
1017
1018 /*
1019 * On disk extended attribute structure for OCFS2.
1020 */
1021
1022 /*
1023 * ocfs2_xattr_entry indicates one extend attribute.
1024 *
1025 * Note that it can be stored in inode, one block or one xattr bucket.
1026 */
1027 struct ocfs2_xattr_entry {
1028 __le32 xe_name_hash; /* hash value of xattr prefix+suffix. */
1029 __le16 xe_name_offset; /* byte offset from the 1st entry in the
1030 local xattr storage(inode, xattr block or
1031 xattr bucket). */
1032 __u8 xe_name_len; /* xattr name len, doesn't include prefix. */
1033 __u8 xe_type; /* the low 7 bits indicate the name prefix
1034 * type and the highest bit indicates whether
1035 * the EA is stored in the local storage. */
1036 __le64 xe_value_size; /* real xattr value length. */
1037 };
1038
1039 /*
1040 * On disk structure for xattr header.
1041 *
1042 * One ocfs2_xattr_header describes how many ocfs2_xattr_entry records in
1043 * the local xattr storage.
1044 */
1045 struct ocfs2_xattr_header {
1046 __le16 xh_count; /* contains the count of how
1047 many records are in the
1048 local xattr storage. */
1049 __le16 xh_free_start; /* current offset for storing
1050 xattr. */
1051 __le16 xh_name_value_len; /* total length of name/value
1052 length in this bucket. */
1053 __le16 xh_num_buckets; /* Number of xattr buckets
1054 in this extent record,
1055 only valid in the first
1056 bucket. */
1057 struct ocfs2_block_check xh_check; /* Error checking
1058 (Note, this is only
1059 used for xattr
1060 buckets. A block uses
1061 xb_check and sets
1062 this field to zero.) */
1063 struct ocfs2_xattr_entry xh_entries[0]; /* xattr entry list. */
1064 };
1065
1066 /*
1067 * On disk structure for xattr value root.
1068 *
1069 * When an xattr's value is large enough, it is stored in an external
1070 * b-tree like file data. The xattr value root points to this structure.
1071 */
1072 struct ocfs2_xattr_value_root {
1073 /*00*/ __le32 xr_clusters; /* clusters covered by xattr value. */
1074 __le32 xr_reserved0;
1075 __le64 xr_last_eb_blk; /* Pointer to last extent block */
1076 /*10*/ struct ocfs2_extent_list xr_list; /* Extent record list */
1077 };
1078
1079 /*
1080 * On disk structure for xattr tree root.
1081 *
1082 * It is used when there are too many extended attributes for one file. These
1083 * attributes will be organized and stored in an indexed-btree.
1084 */
1085 struct ocfs2_xattr_tree_root {
1086 /*00*/ __le32 xt_clusters; /* clusters covered by xattr. */
1087 __le32 xt_reserved0;
1088 __le64 xt_last_eb_blk; /* Pointer to last extent block */
1089 /*10*/ struct ocfs2_extent_list xt_list; /* Extent record list */
1090 };
1091
1092 #define OCFS2_XATTR_INDEXED 0x1
1093 #define OCFS2_HASH_SHIFT 5
1094 #define OCFS2_XATTR_ROUND 3
1095 #define OCFS2_XATTR_SIZE(size) (((size) + OCFS2_XATTR_ROUND) & \
1096 ~(OCFS2_XATTR_ROUND))
1097
1098 #define OCFS2_XATTR_BUCKET_SIZE 4096
1099 #define OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET (OCFS2_XATTR_BUCKET_SIZE \
1100 / OCFS2_MIN_BLOCKSIZE)
1101
1102 /*
1103 * On disk structure for xattr block.
1104 */
1105 struct ocfs2_xattr_block {
1106 /*00*/ __u8 xb_signature[8]; /* Signature for verification */
1107 __le16 xb_suballoc_slot; /* Slot suballocator this
1108 block belongs to. */
1109 __le16 xb_suballoc_bit; /* Bit offset in suballocator
1110 block group */
1111 __le32 xb_fs_generation; /* Must match super block */
1112 /*10*/ __le64 xb_blkno; /* Offset on disk, in blocks */
1113 struct ocfs2_block_check xb_check; /* Error checking */
1114 /*20*/ __le16 xb_flags; /* Indicates whether this block contains
1115 real xattr or a xattr tree. */
1116 __le16 xb_reserved0;
1117 __le32 xb_reserved1;
1118 __le64 xb_suballoc_loc; /* Suballocator block group this
1119 xattr block belongs to. Only
1120 valid if allocated from a
1121 discontiguous block group */
1122 /*30*/ union {
1123 struct ocfs2_xattr_header xb_header; /* xattr header if this
1124 block contains xattr */
1125 struct ocfs2_xattr_tree_root xb_root;/* xattr tree root if this
1126 block cotains xattr
1127 tree. */
1128 } xb_attrs;
1129 };
1130
1131 #define OCFS2_XATTR_ENTRY_LOCAL 0x80
1132 #define OCFS2_XATTR_TYPE_MASK 0x7F
ocfs2_xattr_set_local(struct ocfs2_xattr_entry * xe,int local)1133 static inline void ocfs2_xattr_set_local(struct ocfs2_xattr_entry *xe,
1134 int local)
1135 {
1136 if (local)
1137 xe->xe_type |= OCFS2_XATTR_ENTRY_LOCAL;
1138 else
1139 xe->xe_type &= ~OCFS2_XATTR_ENTRY_LOCAL;
1140 }
1141
ocfs2_xattr_is_local(struct ocfs2_xattr_entry * xe)1142 static inline int ocfs2_xattr_is_local(struct ocfs2_xattr_entry *xe)
1143 {
1144 return xe->xe_type & OCFS2_XATTR_ENTRY_LOCAL;
1145 }
1146
ocfs2_xattr_set_type(struct ocfs2_xattr_entry * xe,int type)1147 static inline void ocfs2_xattr_set_type(struct ocfs2_xattr_entry *xe, int type)
1148 {
1149 xe->xe_type |= type & OCFS2_XATTR_TYPE_MASK;
1150 }
1151
ocfs2_xattr_get_type(struct ocfs2_xattr_entry * xe)1152 static inline int ocfs2_xattr_get_type(struct ocfs2_xattr_entry *xe)
1153 {
1154 return xe->xe_type & OCFS2_XATTR_TYPE_MASK;
1155 }
1156
1157 /*
1158 * On disk structures for global quota file
1159 */
1160
1161 /* Magic numbers and known versions for global quota files */
1162 #define OCFS2_GLOBAL_QMAGICS {\
1163 0x0cf52470, /* USRQUOTA */ \
1164 0x0cf52471 /* GRPQUOTA */ \
1165 }
1166
1167 #define OCFS2_GLOBAL_QVERSIONS {\
1168 0, \
1169 0, \
1170 }
1171
1172
1173 /* Each block of each quota file has a certain fixed number of bytes reserved
1174 * for OCFS2 internal use at its end. OCFS2 can use it for things like
1175 * checksums, etc. */
1176 #define OCFS2_QBLK_RESERVED_SPACE 8
1177
1178 /* Generic header of all quota files */
1179 struct ocfs2_disk_dqheader {
1180 __le32 dqh_magic; /* Magic number identifying file */
1181 __le32 dqh_version; /* Quota format version */
1182 };
1183
1184 #define OCFS2_GLOBAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader))
1185
1186 /* Information header of global quota file (immediately follows the generic
1187 * header) */
1188 struct ocfs2_global_disk_dqinfo {
1189 /*00*/ __le32 dqi_bgrace; /* Grace time for space softlimit excess */
1190 __le32 dqi_igrace; /* Grace time for inode softlimit excess */
1191 __le32 dqi_syncms; /* Time after which we sync local changes to
1192 * global quota file */
1193 __le32 dqi_blocks; /* Number of blocks in quota file */
1194 /*10*/ __le32 dqi_free_blk; /* First free block in quota file */
1195 __le32 dqi_free_entry; /* First block with free dquot entry in quota
1196 * file */
1197 };
1198
1199 /* Structure with global user / group information. We reserve some space
1200 * for future use. */
1201 struct ocfs2_global_disk_dqblk {
1202 /*00*/ __le32 dqb_id; /* ID the structure belongs to */
1203 __le32 dqb_use_count; /* Number of nodes having reference to this structure */
1204 __le64 dqb_ihardlimit; /* absolute limit on allocated inodes */
1205 /*10*/ __le64 dqb_isoftlimit; /* preferred inode limit */
1206 __le64 dqb_curinodes; /* current # allocated inodes */
1207 /*20*/ __le64 dqb_bhardlimit; /* absolute limit on disk space */
1208 __le64 dqb_bsoftlimit; /* preferred limit on disk space */
1209 /*30*/ __le64 dqb_curspace; /* current space occupied */
1210 __le64 dqb_btime; /* time limit for excessive disk use */
1211 /*40*/ __le64 dqb_itime; /* time limit for excessive inode use */
1212 __le64 dqb_pad1;
1213 /*50*/ __le64 dqb_pad2;
1214 };
1215
1216 /*
1217 * On-disk structures for local quota file
1218 */
1219
1220 /* Magic numbers and known versions for local quota files */
1221 #define OCFS2_LOCAL_QMAGICS {\
1222 0x0cf524c0, /* USRQUOTA */ \
1223 0x0cf524c1 /* GRPQUOTA */ \
1224 }
1225
1226 #define OCFS2_LOCAL_QVERSIONS {\
1227 0, \
1228 0, \
1229 }
1230
1231 /* Quota flags in dqinfo header */
1232 #define OLQF_CLEAN 0x0001 /* Quota file is empty (this should be after\
1233 * quota has been cleanly turned off) */
1234
1235 #define OCFS2_LOCAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader))
1236
1237 /* Information header of local quota file (immediately follows the generic
1238 * header) */
1239 struct ocfs2_local_disk_dqinfo {
1240 __le32 dqi_flags; /* Flags for quota file */
1241 __le32 dqi_chunks; /* Number of chunks of quota structures
1242 * with a bitmap */
1243 __le32 dqi_blocks; /* Number of blocks allocated for quota file */
1244 };
1245
1246 /* Header of one chunk of a quota file */
1247 struct ocfs2_local_disk_chunk {
1248 __le32 dqc_free; /* Number of free entries in the bitmap */
1249 __u8 dqc_bitmap[0]; /* Bitmap of entries in the corresponding
1250 * chunk of quota file */
1251 };
1252
1253 /* One entry in local quota file */
1254 struct ocfs2_local_disk_dqblk {
1255 /*00*/ __le64 dqb_id; /* id this quota applies to */
1256 __le64 dqb_spacemod; /* Change in the amount of used space */
1257 /*10*/ __le64 dqb_inodemod; /* Change in the amount of used inodes */
1258 };
1259
1260
1261 /*
1262 * The quota trailer lives at the end of each quota block.
1263 */
1264
1265 struct ocfs2_disk_dqtrailer {
1266 /*00*/ struct ocfs2_block_check dq_check; /* Error checking */
1267 /*08*/ /* Cannot be larger than OCFS2_QBLK_RESERVED_SPACE */
1268 };
1269
ocfs2_block_dqtrailer(int blocksize,void * buf)1270 static inline struct ocfs2_disk_dqtrailer *ocfs2_block_dqtrailer(int blocksize,
1271 void *buf)
1272 {
1273 char *ptr = buf;
1274 ptr += blocksize - OCFS2_QBLK_RESERVED_SPACE;
1275
1276 return (struct ocfs2_disk_dqtrailer *)ptr;
1277 }
1278
1279 #ifdef __KERNEL__
ocfs2_fast_symlink_chars(struct super_block * sb)1280 static inline int ocfs2_fast_symlink_chars(struct super_block *sb)
1281 {
1282 return sb->s_blocksize -
1283 offsetof(struct ocfs2_dinode, id2.i_symlink);
1284 }
1285
ocfs2_max_inline_data_with_xattr(struct super_block * sb,struct ocfs2_dinode * di)1286 static inline int ocfs2_max_inline_data_with_xattr(struct super_block *sb,
1287 struct ocfs2_dinode *di)
1288 {
1289 unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size);
1290
1291 if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL)
1292 return sb->s_blocksize -
1293 offsetof(struct ocfs2_dinode, id2.i_data.id_data) -
1294 xattrsize;
1295 else
1296 return sb->s_blocksize -
1297 offsetof(struct ocfs2_dinode, id2.i_data.id_data);
1298 }
1299
ocfs2_extent_recs_per_inode(struct super_block * sb)1300 static inline int ocfs2_extent_recs_per_inode(struct super_block *sb)
1301 {
1302 int size;
1303
1304 size = sb->s_blocksize -
1305 offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
1306
1307 return size / sizeof(struct ocfs2_extent_rec);
1308 }
1309
ocfs2_extent_recs_per_inode_with_xattr(struct super_block * sb,struct ocfs2_dinode * di)1310 static inline int ocfs2_extent_recs_per_inode_with_xattr(
1311 struct super_block *sb,
1312 struct ocfs2_dinode *di)
1313 {
1314 int size;
1315 unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size);
1316
1317 if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL)
1318 size = sb->s_blocksize -
1319 offsetof(struct ocfs2_dinode, id2.i_list.l_recs) -
1320 xattrsize;
1321 else
1322 size = sb->s_blocksize -
1323 offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
1324
1325 return size / sizeof(struct ocfs2_extent_rec);
1326 }
1327
ocfs2_extent_recs_per_dx_root(struct super_block * sb)1328 static inline int ocfs2_extent_recs_per_dx_root(struct super_block *sb)
1329 {
1330 int size;
1331
1332 size = sb->s_blocksize -
1333 offsetof(struct ocfs2_dx_root_block, dr_list.l_recs);
1334
1335 return size / sizeof(struct ocfs2_extent_rec);
1336 }
1337
ocfs2_chain_recs_per_inode(struct super_block * sb)1338 static inline int ocfs2_chain_recs_per_inode(struct super_block *sb)
1339 {
1340 int size;
1341
1342 size = sb->s_blocksize -
1343 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
1344
1345 return size / sizeof(struct ocfs2_chain_rec);
1346 }
1347
ocfs2_extent_recs_per_eb(struct super_block * sb)1348 static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb)
1349 {
1350 int size;
1351
1352 size = sb->s_blocksize -
1353 offsetof(struct ocfs2_extent_block, h_list.l_recs);
1354
1355 return size / sizeof(struct ocfs2_extent_rec);
1356 }
1357
ocfs2_extent_recs_per_gd(struct super_block * sb)1358 static inline u16 ocfs2_extent_recs_per_gd(struct super_block *sb)
1359 {
1360 int size;
1361
1362 size = sb->s_blocksize -
1363 offsetof(struct ocfs2_group_desc, bg_list.l_recs);
1364
1365 return size / sizeof(struct ocfs2_extent_rec);
1366 }
1367
ocfs2_dx_entries_per_leaf(struct super_block * sb)1368 static inline int ocfs2_dx_entries_per_leaf(struct super_block *sb)
1369 {
1370 int size;
1371
1372 size = sb->s_blocksize -
1373 offsetof(struct ocfs2_dx_leaf, dl_list.de_entries);
1374
1375 return size / sizeof(struct ocfs2_dx_entry);
1376 }
1377
ocfs2_dx_entries_per_root(struct super_block * sb)1378 static inline int ocfs2_dx_entries_per_root(struct super_block *sb)
1379 {
1380 int size;
1381
1382 size = sb->s_blocksize -
1383 offsetof(struct ocfs2_dx_root_block, dr_entries.de_entries);
1384
1385 return size / sizeof(struct ocfs2_dx_entry);
1386 }
1387
ocfs2_local_alloc_size(struct super_block * sb)1388 static inline u16 ocfs2_local_alloc_size(struct super_block *sb)
1389 {
1390 u16 size;
1391
1392 size = sb->s_blocksize -
1393 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
1394
1395 return size;
1396 }
1397
ocfs2_group_bitmap_size(struct super_block * sb,int suballocator,u32 feature_incompat)1398 static inline int ocfs2_group_bitmap_size(struct super_block *sb,
1399 int suballocator,
1400 u32 feature_incompat)
1401 {
1402 int size = sb->s_blocksize -
1403 offsetof(struct ocfs2_group_desc, bg_bitmap);
1404
1405 /*
1406 * The cluster allocator uses the entire block. Suballocators have
1407 * never used more than OCFS2_MAX_BG_BITMAP_SIZE. Unfortunately, older
1408 * code expects bg_size set to the maximum. Thus we must keep
1409 * bg_size as-is unless discontig_bg is enabled.
1410 */
1411 if (suballocator &&
1412 (feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG))
1413 size = OCFS2_MAX_BG_BITMAP_SIZE;
1414
1415 return size;
1416 }
1417
ocfs2_truncate_recs_per_inode(struct super_block * sb)1418 static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb)
1419 {
1420 int size;
1421
1422 size = sb->s_blocksize -
1423 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
1424
1425 return size / sizeof(struct ocfs2_truncate_rec);
1426 }
1427
ocfs2_backup_super_blkno(struct super_block * sb,int index)1428 static inline u64 ocfs2_backup_super_blkno(struct super_block *sb, int index)
1429 {
1430 u64 offset = OCFS2_BACKUP_SB_START;
1431
1432 if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) {
1433 offset <<= (2 * index);
1434 offset >>= sb->s_blocksize_bits;
1435 return offset;
1436 }
1437
1438 return 0;
1439
1440 }
1441
ocfs2_xattr_recs_per_xb(struct super_block * sb)1442 static inline u16 ocfs2_xattr_recs_per_xb(struct super_block *sb)
1443 {
1444 int size;
1445
1446 size = sb->s_blocksize -
1447 offsetof(struct ocfs2_xattr_block,
1448 xb_attrs.xb_root.xt_list.l_recs);
1449
1450 return size / sizeof(struct ocfs2_extent_rec);
1451 }
1452
ocfs2_extent_recs_per_rb(struct super_block * sb)1453 static inline u16 ocfs2_extent_recs_per_rb(struct super_block *sb)
1454 {
1455 int size;
1456
1457 size = sb->s_blocksize -
1458 offsetof(struct ocfs2_refcount_block, rf_list.l_recs);
1459
1460 return size / sizeof(struct ocfs2_extent_rec);
1461 }
1462
ocfs2_refcount_recs_per_rb(struct super_block * sb)1463 static inline u16 ocfs2_refcount_recs_per_rb(struct super_block *sb)
1464 {
1465 int size;
1466
1467 size = sb->s_blocksize -
1468 offsetof(struct ocfs2_refcount_block, rf_records.rl_recs);
1469
1470 return size / sizeof(struct ocfs2_refcount_rec);
1471 }
1472
1473 static inline u32
ocfs2_get_ref_rec_low_cpos(const struct ocfs2_refcount_rec * rec)1474 ocfs2_get_ref_rec_low_cpos(const struct ocfs2_refcount_rec *rec)
1475 {
1476 return le64_to_cpu(rec->r_cpos) & OCFS2_32BIT_POS_MASK;
1477 }
1478 #else
ocfs2_fast_symlink_chars(int blocksize)1479 static inline int ocfs2_fast_symlink_chars(int blocksize)
1480 {
1481 return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink);
1482 }
1483
ocfs2_max_inline_data_with_xattr(int blocksize,struct ocfs2_dinode * di)1484 static inline int ocfs2_max_inline_data_with_xattr(int blocksize,
1485 struct ocfs2_dinode *di)
1486 {
1487 if (di && (di->i_dyn_features & OCFS2_INLINE_XATTR_FL))
1488 return blocksize -
1489 offsetof(struct ocfs2_dinode, id2.i_data.id_data) -
1490 di->i_xattr_inline_size;
1491 else
1492 return blocksize -
1493 offsetof(struct ocfs2_dinode, id2.i_data.id_data);
1494 }
1495
ocfs2_extent_recs_per_inode(int blocksize)1496 static inline int ocfs2_extent_recs_per_inode(int blocksize)
1497 {
1498 int size;
1499
1500 size = blocksize -
1501 offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
1502
1503 return size / sizeof(struct ocfs2_extent_rec);
1504 }
1505
ocfs2_chain_recs_per_inode(int blocksize)1506 static inline int ocfs2_chain_recs_per_inode(int blocksize)
1507 {
1508 int size;
1509
1510 size = blocksize -
1511 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
1512
1513 return size / sizeof(struct ocfs2_chain_rec);
1514 }
1515
ocfs2_extent_recs_per_eb(int blocksize)1516 static inline int ocfs2_extent_recs_per_eb(int blocksize)
1517 {
1518 int size;
1519
1520 size = blocksize -
1521 offsetof(struct ocfs2_extent_block, h_list.l_recs);
1522
1523 return size / sizeof(struct ocfs2_extent_rec);
1524 }
1525
ocfs2_extent_recs_per_gd(int blocksize)1526 static inline int ocfs2_extent_recs_per_gd(int blocksize)
1527 {
1528 int size;
1529
1530 size = blocksize -
1531 offsetof(struct ocfs2_group_desc, bg_list.l_recs);
1532
1533 return size / sizeof(struct ocfs2_extent_rec);
1534 }
1535
ocfs2_local_alloc_size(int blocksize)1536 static inline int ocfs2_local_alloc_size(int blocksize)
1537 {
1538 int size;
1539
1540 size = blocksize -
1541 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
1542
1543 return size;
1544 }
1545
ocfs2_group_bitmap_size(int blocksize,int suballocator,uint32_t feature_incompat)1546 static inline int ocfs2_group_bitmap_size(int blocksize,
1547 int suballocator,
1548 uint32_t feature_incompat)
1549 {
1550 int size = sb->s_blocksize -
1551 offsetof(struct ocfs2_group_desc, bg_bitmap);
1552
1553 /*
1554 * The cluster allocator uses the entire block. Suballocators have
1555 * never used more than OCFS2_MAX_BG_BITMAP_SIZE. Unfortunately, older
1556 * code expects bg_size set to the maximum. Thus we must keep
1557 * bg_size as-is unless discontig_bg is enabled.
1558 */
1559 if (suballocator &&
1560 (feature_incompat & OCFS2_FEATURE_INCOMPAT_DISCONTIG_BG))
1561 size = OCFS2_MAX_BG_BITMAP_SIZE;
1562
1563 return size;
1564 }
1565
ocfs2_truncate_recs_per_inode(int blocksize)1566 static inline int ocfs2_truncate_recs_per_inode(int blocksize)
1567 {
1568 int size;
1569
1570 size = blocksize -
1571 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
1572
1573 return size / sizeof(struct ocfs2_truncate_rec);
1574 }
1575
ocfs2_backup_super_blkno(int blocksize,int index)1576 static inline uint64_t ocfs2_backup_super_blkno(int blocksize, int index)
1577 {
1578 uint64_t offset = OCFS2_BACKUP_SB_START;
1579
1580 if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) {
1581 offset <<= (2 * index);
1582 offset /= blocksize;
1583 return offset;
1584 }
1585
1586 return 0;
1587 }
1588
ocfs2_xattr_recs_per_xb(int blocksize)1589 static inline int ocfs2_xattr_recs_per_xb(int blocksize)
1590 {
1591 int size;
1592
1593 size = blocksize -
1594 offsetof(struct ocfs2_xattr_block,
1595 xb_attrs.xb_root.xt_list.l_recs);
1596
1597 return size / sizeof(struct ocfs2_extent_rec);
1598 }
1599 #endif /* __KERNEL__ */
1600
1601
ocfs2_system_inode_is_global(int type)1602 static inline int ocfs2_system_inode_is_global(int type)
1603 {
1604 return ((type >= 0) &&
1605 (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE));
1606 }
1607
ocfs2_sprintf_system_inode_name(char * buf,int len,int type,int slot)1608 static inline int ocfs2_sprintf_system_inode_name(char *buf, int len,
1609 int type, int slot)
1610 {
1611 int chars;
1612
1613 /*
1614 * Global system inodes can only have one copy. Everything
1615 * after OCFS2_LAST_GLOBAL_SYSTEM_INODE in the system inode
1616 * list has a copy per slot.
1617 */
1618 if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)
1619 chars = snprintf(buf, len, "%s",
1620 ocfs2_system_inodes[type].si_name);
1621 else
1622 chars = snprintf(buf, len,
1623 ocfs2_system_inodes[type].si_name,
1624 slot);
1625
1626 return chars;
1627 }
1628
ocfs2_set_de_type(struct ocfs2_dir_entry * de,umode_t mode)1629 static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de,
1630 umode_t mode)
1631 {
1632 de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
1633 }
1634
ocfs2_gd_is_discontig(struct ocfs2_group_desc * gd)1635 static inline int ocfs2_gd_is_discontig(struct ocfs2_group_desc *gd)
1636 {
1637 if ((offsetof(struct ocfs2_group_desc, bg_bitmap) +
1638 le16_to_cpu(gd->bg_size)) !=
1639 offsetof(struct ocfs2_group_desc, bg_list))
1640 return 0;
1641 /*
1642 * Only valid to check l_next_free_rec if
1643 * bg_bitmap + bg_size == bg_list.
1644 */
1645 if (!gd->bg_list.l_next_free_rec)
1646 return 0;
1647 return 1;
1648 }
1649 #endif /* _OCFS2_FS_H */
1650
1651
