1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * On-disk structures for OCFS2.
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
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.
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.
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.
29 #define OCFS2_MAJOR_REV_LEVEL 0
30 #define OCFS2_MINOR_REV_LEVEL 90
33 * An OCFS2 volume starts this way:
34 * Sector 0: Valid ocfs1_vol_disk_hdr that cleanly fails to mount OCFS.
35 * Sector 1: Valid ocfs1_vol_label that cleanly fails to mount OCFS.
36 * Block OCFS2_SUPER_BLOCK_BLKNO: OCFS2 superblock.
38 * All other structures are found from the superblock information.
40 * OCFS2_SUPER_BLOCK_BLKNO is in blocks, not sectors. eg, for a
41 * blocksize of 2K, it is 4096 bytes into disk.
43 #define OCFS2_SUPER_BLOCK_BLKNO 2
46 * Cluster size limits. The maximum is kept arbitrarily at 1 MB, and could
49 #define OCFS2_MIN_CLUSTERSIZE 4096
50 #define OCFS2_MAX_CLUSTERSIZE 1048576
53 * Blocks cannot be bigger than clusters, so the maximum blocksize is the
54 * minimum cluster size.
56 #define OCFS2_MIN_BLOCKSIZE 512
57 #define OCFS2_MAX_BLOCKSIZE OCFS2_MIN_CLUSTERSIZE
59 /* Filesystem magic number */
60 #define OCFS2_SUPER_MAGIC 0x7461636f
62 /* Object signatures */
63 #define OCFS2_SUPER_BLOCK_SIGNATURE "OCFSV2"
64 #define OCFS2_INODE_SIGNATURE "INODE01"
65 #define OCFS2_EXTENT_BLOCK_SIGNATURE "EXBLK01"
66 #define OCFS2_GROUP_DESC_SIGNATURE "GROUP01"
67 #define OCFS2_XATTR_BLOCK_SIGNATURE "XATTR01"
68 #define OCFS2_DIR_TRAILER_SIGNATURE "DIRTRL1"
69 #define OCFS2_DX_ROOT_SIGNATURE "DXDIR01"
70 #define OCFS2_DX_LEAF_SIGNATURE "DXLEAF1"
71 #define OCFS2_REFCOUNT_BLOCK_SIGNATURE "REFCNT1"
73 /* Compatibility flags */
74 #define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \
75 ( OCFS2_SB(sb)->s_feature_compat & (mask) )
76 #define OCFS2_HAS_RO_COMPAT_FEATURE(sb,mask) \
77 ( OCFS2_SB(sb)->s_feature_ro_compat & (mask) )
78 #define OCFS2_HAS_INCOMPAT_FEATURE(sb,mask) \
79 ( OCFS2_SB(sb)->s_feature_incompat & (mask) )
80 #define OCFS2_SET_COMPAT_FEATURE(sb,mask) \
81 OCFS2_SB(sb)->s_feature_compat |= (mask)
82 #define OCFS2_SET_RO_COMPAT_FEATURE(sb,mask) \
83 OCFS2_SB(sb)->s_feature_ro_compat |= (mask)
84 #define OCFS2_SET_INCOMPAT_FEATURE(sb,mask) \
85 OCFS2_SB(sb)->s_feature_incompat |= (mask)
86 #define OCFS2_CLEAR_COMPAT_FEATURE(sb,mask) \
87 OCFS2_SB(sb)->s_feature_compat &= ~(mask)
88 #define OCFS2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
89 OCFS2_SB(sb)->s_feature_ro_compat &= ~(mask)
90 #define OCFS2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
91 OCFS2_SB(sb)->s_feature_incompat &= ~(mask)
93 #define OCFS2_FEATURE_COMPAT_SUPP (OCFS2_FEATURE_COMPAT_BACKUP_SB \
94 | OCFS2_FEATURE_COMPAT_JBD2_SB)
95 #define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \
96 | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC \
97 | OCFS2_FEATURE_INCOMPAT_INLINE_DATA \
98 | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP \
99 | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK \
100 | OCFS2_FEATURE_INCOMPAT_XATTR \
101 | OCFS2_FEATURE_INCOMPAT_META_ECC \
102 | OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS)
103 #define OCFS2_FEATURE_RO_COMPAT_SUPP (OCFS2_FEATURE_RO_COMPAT_UNWRITTEN \
104 | OCFS2_FEATURE_RO_COMPAT_USRQUOTA \
105 | OCFS2_FEATURE_RO_COMPAT_GRPQUOTA)
108 * Heartbeat-only devices are missing journals and other files. The
109 * filesystem driver can't load them, but the library can. Never put
110 * this in OCFS2_FEATURE_INCOMPAT_SUPP, *ever*.
112 #define OCFS2_FEATURE_INCOMPAT_HEARTBEAT_DEV 0x0002
115 * tunefs sets this incompat flag before starting the resize and clears it
116 * at the end. This flag protects users from inadvertently mounting the fs
117 * after an aborted run without fsck-ing.
119 #define OCFS2_FEATURE_INCOMPAT_RESIZE_INPROG 0x0004
121 /* Used to denote a non-clustered volume */
122 #define OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT 0x0008
124 /* Support for sparse allocation in b-trees */
125 #define OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC 0x0010
128 * Tunefs sets this incompat flag before starting an operation which
129 * would require cleanup on abort. This is done to protect users from
130 * inadvertently mounting the fs after an aborted run without
133 * s_tunefs_flags on the super block describes precisely which
134 * operations were in progress.
136 #define OCFS2_FEATURE_INCOMPAT_TUNEFS_INPROG 0x0020
138 /* Support for data packed into inode blocks */
139 #define OCFS2_FEATURE_INCOMPAT_INLINE_DATA 0x0040
142 * Support for alternate, userspace cluster stacks. If set, the superblock
143 * field s_cluster_info contains a tag for the alternate stack in use as
144 * well as the name of the cluster being joined.
145 * mount.ocfs2 must pass in a matching stack name.
147 * If not set, the classic stack will be used. This is compatbile with
148 * all older versions.
150 #define OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK 0x0080
152 /* Support for the extended slot map */
153 #define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100
155 /* Support for extended attributes */
156 #define OCFS2_FEATURE_INCOMPAT_XATTR 0x0200
158 /* Support for indexed directores */
159 #define OCFS2_FEATURE_INCOMPAT_INDEXED_DIRS 0x0400
161 /* Metadata checksum and error correction */
162 #define OCFS2_FEATURE_INCOMPAT_META_ECC 0x0800
164 /* Refcount tree support */
165 #define OCFS2_FEATURE_INCOMPAT_REFCOUNT_TREE 0x1000
168 * backup superblock flag is used to indicate that this volume
169 * has backup superblocks.
171 #define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001
174 * The filesystem will correctly handle journal feature bits.
176 #define OCFS2_FEATURE_COMPAT_JBD2_SB 0x0002
179 * Unwritten extents support.
181 #define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN 0x0001
184 * Maintain quota information for this filesystem
186 #define OCFS2_FEATURE_RO_COMPAT_USRQUOTA 0x0002
187 #define OCFS2_FEATURE_RO_COMPAT_GRPQUOTA 0x0004
189 /* The byte offset of the first backup block will be 1G.
190 * The following will be 4G, 16G, 64G, 256G and 1T.
192 #define OCFS2_BACKUP_SB_START 1 << 30
194 /* the max backup superblock nums */
195 #define OCFS2_MAX_BACKUP_SUPERBLOCKS 6
198 * Flags on ocfs2_super_block.s_tunefs_flags
200 #define OCFS2_TUNEFS_INPROG_REMOVE_SLOT 0x0001 /* Removing slots */
203 * Flags on ocfs2_dinode.i_flags
205 #define OCFS2_VALID_FL (0x00000001) /* Inode is valid */
206 #define OCFS2_UNUSED2_FL (0x00000002)
207 #define OCFS2_ORPHANED_FL (0x00000004) /* On the orphan list */
208 #define OCFS2_UNUSED3_FL (0x00000008)
209 /* System inode flags */
210 #define OCFS2_SYSTEM_FL (0x00000010) /* System inode */
211 #define OCFS2_SUPER_BLOCK_FL (0x00000020) /* Super block */
212 #define OCFS2_LOCAL_ALLOC_FL (0x00000040) /* Slot local alloc bitmap */
213 #define OCFS2_BITMAP_FL (0x00000080) /* Allocation bitmap */
214 #define OCFS2_JOURNAL_FL (0x00000100) /* Slot local journal */
215 #define OCFS2_HEARTBEAT_FL (0x00000200) /* Heartbeat area */
216 #define OCFS2_CHAIN_FL (0x00000400) /* Chain allocator */
217 #define OCFS2_DEALLOC_FL (0x00000800) /* Truncate log */
218 #define OCFS2_QUOTA_FL (0x00001000) /* Quota file */
221 * Flags on ocfs2_dinode.i_dyn_features
223 * These can change much more often than i_flags. When adding flags,
224 * keep in mind that i_dyn_features is only 16 bits wide.
226 #define OCFS2_INLINE_DATA_FL (0x0001) /* Data stored in inode block */
227 #define OCFS2_HAS_XATTR_FL (0x0002)
228 #define OCFS2_INLINE_XATTR_FL (0x0004)
229 #define OCFS2_INDEXED_DIR_FL (0x0008)
230 #define OCFS2_HAS_REFCOUNT_FL (0x0010)
232 /* Inode attributes, keep in sync with EXT2 */
233 #define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */
234 #define OCFS2_UNRM_FL (0x00000002) /* Undelete */
235 #define OCFS2_COMPR_FL (0x00000004) /* Compress file */
236 #define OCFS2_SYNC_FL (0x00000008) /* Synchronous updates */
237 #define OCFS2_IMMUTABLE_FL (0x00000010) /* Immutable file */
238 #define OCFS2_APPEND_FL (0x00000020) /* writes to file may only append */
239 #define OCFS2_NODUMP_FL (0x00000040) /* do not dump file */
240 #define OCFS2_NOATIME_FL (0x00000080) /* do not update atime */
241 #define OCFS2_DIRSYNC_FL (0x00010000) /* dirsync behaviour (directories only) */
243 #define OCFS2_FL_VISIBLE (0x000100FF) /* User visible flags */
244 #define OCFS2_FL_MODIFIABLE (0x000100FF) /* User modifiable flags */
247 * Extent record flags (e_node.leaf.flags)
249 #define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but
251 #define OCFS2_EXT_REFCOUNTED (0x02) /* Extent is reference
252 * counted in an associated
258 #define OCFS2_IOC_GETFLAGS _IOR('f', 1, long)
259 #define OCFS2_IOC_SETFLAGS _IOW('f', 2, long)
260 #define OCFS2_IOC32_GETFLAGS _IOR('f', 1, int)
261 #define OCFS2_IOC32_SETFLAGS _IOW('f', 2, int)
264 * Space reservation / allocation / free ioctls and argument structure
265 * are designed to be compatible with XFS.
267 * ALLOCSP* and FREESP* are not and will never be supported, but are
268 * included here for completeness.
270 struct ocfs2_space_resv {
274 __s64 l_len; /* len == 0 means until end of file */
277 __s32 l_pad[4]; /* reserve area */
280 #define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv)
281 #define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv)
282 #define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv)
283 #define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv)
284 #define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv)
285 #define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv)
286 #define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv)
287 #define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv)
289 /* Used to pass group descriptor data when online resize is done */
290 struct ocfs2_new_group_input {
291 __u64 group; /* Group descriptor's blkno. */
292 __u32 clusters; /* Total number of clusters in this group */
293 __u32 frees; /* Total free clusters in this group */
294 __u16 chain; /* Chain for this group */
299 #define OCFS2_IOC_GROUP_EXTEND _IOW('o', 1, int)
300 #define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input)
301 #define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input)
304 * Journal Flags (ocfs2_dinode.id1.journal1.i_flags)
306 #define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */
309 * superblock s_state flags
311 #define OCFS2_ERROR_FS (0x00000001) /* FS saw errors */
313 /* Limit of space in ocfs2_dir_entry */
314 #define OCFS2_MAX_FILENAME_LEN 255
316 /* Maximum slots on an ocfs2 file system */
317 #define OCFS2_MAX_SLOTS 255
319 /* Slot map indicator for an empty slot */
320 #define OCFS2_INVALID_SLOT -1
322 #define OCFS2_VOL_UUID_LEN 16
323 #define OCFS2_MAX_VOL_LABEL_LEN 64
325 /* The alternate, userspace stack fields */
326 #define OCFS2_STACK_LABEL_LEN 4
327 #define OCFS2_CLUSTER_NAME_LEN 16
329 /* Journal limits (in bytes) */
330 #define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024)
333 * Default local alloc size (in megabytes)
335 * The value chosen should be such that most allocations, including new
336 * block groups, use local alloc.
338 #define OCFS2_DEFAULT_LOCAL_ALLOC_SIZE 8
341 * Inline extended attribute size (in bytes)
342 * The value chosen should be aligned to 16 byte boundaries.
344 #define OCFS2_MIN_XATTR_INLINE_SIZE 256
346 struct ocfs2_system_inode_info {
352 /* System file index */
354 BAD_BLOCK_SYSTEM_INODE = 0,
355 GLOBAL_INODE_ALLOC_SYSTEM_INODE,
356 SLOT_MAP_SYSTEM_INODE,
357 #define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE
358 HEARTBEAT_SYSTEM_INODE,
359 GLOBAL_BITMAP_SYSTEM_INODE,
360 USER_QUOTA_SYSTEM_INODE,
361 GROUP_QUOTA_SYSTEM_INODE,
362 #define OCFS2_LAST_GLOBAL_SYSTEM_INODE GROUP_QUOTA_SYSTEM_INODE
363 ORPHAN_DIR_SYSTEM_INODE,
364 EXTENT_ALLOC_SYSTEM_INODE,
365 INODE_ALLOC_SYSTEM_INODE,
366 JOURNAL_SYSTEM_INODE,
367 LOCAL_ALLOC_SYSTEM_INODE,
368 TRUNCATE_LOG_SYSTEM_INODE,
369 LOCAL_USER_QUOTA_SYSTEM_INODE,
370 LOCAL_GROUP_QUOTA_SYSTEM_INODE,
374 static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = {
375 /* Global system inodes (single copy) */
376 /* The first two are only used from userspace mfks/tunefs */
377 [BAD_BLOCK_SYSTEM_INODE] = { "bad_blocks", 0, S_IFREG | 0644 },
378 [GLOBAL_INODE_ALLOC_SYSTEM_INODE] = { "global_inode_alloc", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
380 /* These are used by the running filesystem */
381 [SLOT_MAP_SYSTEM_INODE] = { "slot_map", 0, S_IFREG | 0644 },
382 [HEARTBEAT_SYSTEM_INODE] = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 },
383 [GLOBAL_BITMAP_SYSTEM_INODE] = { "global_bitmap", 0, S_IFREG | 0644 },
384 [USER_QUOTA_SYSTEM_INODE] = { "aquota.user", OCFS2_QUOTA_FL, S_IFREG | 0644 },
385 [GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group", OCFS2_QUOTA_FL, S_IFREG | 0644 },
387 /* Slot-specific system inodes (one copy per slot) */
388 [ORPHAN_DIR_SYSTEM_INODE] = { "orphan_dir:%04d", 0, S_IFDIR | 0755 },
389 [EXTENT_ALLOC_SYSTEM_INODE] = { "extent_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
390 [INODE_ALLOC_SYSTEM_INODE] = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 },
391 [JOURNAL_SYSTEM_INODE] = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 },
392 [LOCAL_ALLOC_SYSTEM_INODE] = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 },
393 [TRUNCATE_LOG_SYSTEM_INODE] = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 },
394 [LOCAL_USER_QUOTA_SYSTEM_INODE] = { "aquota.user:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 },
395 [LOCAL_GROUP_QUOTA_SYSTEM_INODE] = { "aquota.group:%04d", OCFS2_QUOTA_FL, S_IFREG | 0644 },
398 /* Parameter passed from mount.ocfs2 to module */
399 #define OCFS2_HB_NONE "heartbeat=none"
400 #define OCFS2_HB_LOCAL "heartbeat=local"
403 * OCFS2 directory file types. Only the low 3 bits are used. The
404 * other bits are reserved for now.
406 #define OCFS2_FT_UNKNOWN 0
407 #define OCFS2_FT_REG_FILE 1
408 #define OCFS2_FT_DIR 2
409 #define OCFS2_FT_CHRDEV 3
410 #define OCFS2_FT_BLKDEV 4
411 #define OCFS2_FT_FIFO 5
412 #define OCFS2_FT_SOCK 6
413 #define OCFS2_FT_SYMLINK 7
415 #define OCFS2_FT_MAX 8
418 * OCFS2_DIR_PAD defines the directory entries boundaries
420 * NOTE: It must be a multiple of 4
422 #define OCFS2_DIR_PAD 4
423 #define OCFS2_DIR_ROUND (OCFS2_DIR_PAD - 1)
424 #define OCFS2_DIR_MEMBER_LEN offsetof(struct ocfs2_dir_entry, name)
425 #define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \
428 #define OCFS2_DIR_MIN_REC_LEN OCFS2_DIR_REC_LEN(1)
430 #define OCFS2_LINK_MAX 32000
431 #define OCFS2_DX_LINK_MAX ((1U << 31) - 1U)
432 #define OCFS2_LINKS_HI_SHIFT 16
433 #define OCFS2_DX_ENTRIES_MAX (0xffffffffU)
436 static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = {
437 [S_IFREG >> S_SHIFT] = OCFS2_FT_REG_FILE,
438 [S_IFDIR >> S_SHIFT] = OCFS2_FT_DIR,
439 [S_IFCHR >> S_SHIFT] = OCFS2_FT_CHRDEV,
440 [S_IFBLK >> S_SHIFT] = OCFS2_FT_BLKDEV,
441 [S_IFIFO >> S_SHIFT] = OCFS2_FT_FIFO,
442 [S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK,
443 [S_IFLNK >> S_SHIFT] = OCFS2_FT_SYMLINK,
450 #define OCFS2_RAW_SB(dinode) (&((dinode)->id2.i_super))
453 * Block checking structure. This is used in metadata to validate the
454 * contents. If OCFS2_FEATURE_INCOMPAT_META_ECC is not set, it is all
457 struct ocfs2_block_check {
458 /*00*/ __le32 bc_crc32e; /* 802.3 Ethernet II CRC32 */
459 __le16 bc_ecc; /* Single-error-correction parity vector.
460 This is a simple Hamming code dependant
461 on the blocksize. OCFS2's maximum
462 blocksize, 4K, requires 16 parity bits,
463 so we fit in __le16. */
469 * On disk extent record for OCFS2
470 * It describes a range of clusters on disk.
472 * Length fields are divided into interior and leaf node versions.
473 * This leaves room for a flags field (OCFS2_EXT_*) in the leaf nodes.
475 struct ocfs2_extent_rec {
476 /*00*/ __le32 e_cpos; /* Offset into the file, in clusters */
478 __le32 e_int_clusters; /* Clusters covered by all children */
480 __le16 e_leaf_clusters; /* Clusters covered by this
483 __u8 e_flags; /* Extent flags */
486 __le64 e_blkno; /* Physical disk offset, in blocks */
490 struct ocfs2_chain_rec {
491 __le32 c_free; /* Number of free bits in this chain. */
492 __le32 c_total; /* Number of total bits in this chain */
493 __le64 c_blkno; /* Physical disk offset (blocks) of 1st group */
496 struct ocfs2_truncate_rec {
497 __le32 t_start; /* 1st cluster in this log */
498 __le32 t_clusters; /* Number of total clusters covered */
502 * On disk extent list for OCFS2 (node in the tree). Note that this
503 * is contained inside ocfs2_dinode or ocfs2_extent_block, so the
504 * offsets are relative to ocfs2_dinode.id2.i_list or
505 * ocfs2_extent_block.h_list, respectively.
507 struct ocfs2_extent_list {
508 /*00*/ __le16 l_tree_depth; /* Extent tree depth from this
509 point. 0 means data extents
510 hang directly off this
512 NOTE: The high 8 bits cannot be
513 used - tree_depth is never that big.
515 __le16 l_count; /* Number of extent records */
516 __le16 l_next_free_rec; /* Next unused extent slot */
518 __le64 l_reserved2; /* Pad to
519 sizeof(ocfs2_extent_rec) */
520 /*10*/ struct ocfs2_extent_rec l_recs[0]; /* Extent records */
524 * On disk allocation chain list for OCFS2. Note that this is
525 * contained inside ocfs2_dinode, so the offsets are relative to
526 * ocfs2_dinode.id2.i_chain.
528 struct ocfs2_chain_list {
529 /*00*/ __le16 cl_cpg; /* Clusters per Block Group */
530 __le16 cl_bpc; /* Bits per cluster */
531 __le16 cl_count; /* Total chains in this list */
532 __le16 cl_next_free_rec; /* Next unused chain slot */
534 /*10*/ struct ocfs2_chain_rec cl_recs[0]; /* Chain records */
538 * On disk deallocation log for OCFS2. Note that this is
539 * contained inside ocfs2_dinode, so the offsets are relative to
540 * ocfs2_dinode.id2.i_dealloc.
542 struct ocfs2_truncate_log {
543 /*00*/ __le16 tl_count; /* Total records in this log */
544 __le16 tl_used; /* Number of records in use */
546 /*08*/ struct ocfs2_truncate_rec tl_recs[0]; /* Truncate records */
550 * On disk extent block (indirect block) for OCFS2
552 struct ocfs2_extent_block
554 /*00*/ __u8 h_signature[8]; /* Signature for verification */
555 struct ocfs2_block_check h_check; /* Error checking */
556 /*10*/ __le16 h_suballoc_slot; /* Slot suballocator this
557 extent_header belongs to */
558 __le16 h_suballoc_bit; /* Bit offset in suballocator
560 __le32 h_fs_generation; /* Must match super block */
561 __le64 h_blkno; /* Offset on disk, in blocks */
562 /*20*/ __le64 h_reserved3;
563 __le64 h_next_leaf_blk; /* Offset on disk, in blocks,
564 of next leaf header pointing
566 /*30*/ struct ocfs2_extent_list h_list; /* Extent record list */
567 /* Actual on-disk size is one block */
571 * On disk slot map for OCFS2. This defines the contents of the "slot_map"
572 * system file. A slot is valid if it contains a node number >= 0. The
573 * value -1 (0xFFFF) is OCFS2_INVALID_SLOT. This marks a slot empty.
575 struct ocfs2_slot_map {
576 /*00*/ __le16 sm_slots[0];
578 * Actual on-disk size is one block. OCFS2_MAX_SLOTS is 255,
579 * 255 * sizeof(__le16) == 512B, within the 512B block minimum blocksize.
583 struct ocfs2_extended_slot {
584 /*00*/ __u8 es_valid;
585 __u8 es_reserved1[3];
591 * The extended slot map, used when OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP
592 * is set. It separates out the valid marker from the node number, and
593 * has room to grow. Unlike the old slot map, this format is defined by
596 struct ocfs2_slot_map_extended {
597 /*00*/ struct ocfs2_extended_slot se_slots[0];
599 * Actual size is i_size of the slot_map system file. It should
600 * match s_max_slots * sizeof(struct ocfs2_extended_slot)
604 struct ocfs2_cluster_info {
605 /*00*/ __u8 ci_stack[OCFS2_STACK_LABEL_LEN];
607 /*08*/ __u8 ci_cluster[OCFS2_CLUSTER_NAME_LEN];
612 * On disk superblock for OCFS2
613 * Note that it is contained inside an ocfs2_dinode, so all offsets
614 * are relative to the start of ocfs2_dinode.id2.
616 struct ocfs2_super_block {
617 /*00*/ __le16 s_major_rev_level;
618 __le16 s_minor_rev_level;
620 __le16 s_max_mnt_count;
621 __le16 s_state; /* File system state */
622 __le16 s_errors; /* Behaviour when detecting errors */
623 __le32 s_checkinterval; /* Max time between checks */
624 /*10*/ __le64 s_lastcheck; /* Time of last check */
625 __le32 s_creator_os; /* OS */
626 __le32 s_feature_compat; /* Compatible feature set */
627 /*20*/ __le32 s_feature_incompat; /* Incompatible feature set */
628 __le32 s_feature_ro_compat; /* Readonly-compatible feature set */
629 __le64 s_root_blkno; /* Offset, in blocks, of root directory
631 /*30*/ __le64 s_system_dir_blkno; /* Offset, in blocks, of system
633 __le32 s_blocksize_bits; /* Blocksize for this fs */
634 __le32 s_clustersize_bits; /* Clustersize for this fs */
635 /*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts
636 before tunefs required */
637 __le16 s_tunefs_flag;
638 __le32 s_uuid_hash; /* hash value of uuid */
639 __le64 s_first_cluster_group; /* Block offset of 1st cluster
641 /*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */
642 /*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */
643 /*A0*/ struct ocfs2_cluster_info s_cluster_info; /* Selected userspace
645 with INCOMPAT flag. */
646 /*B8*/ __le16 s_xattr_inline_size; /* extended attribute inline size
649 __le32 s_dx_seed[3]; /* seed[0-2] for dx dir hash.
650 * s_uuid_hash serves as seed[3]. */
651 /*C0*/ __le64 s_reserved2[15]; /* Fill out superblock */
655 * NOTE: As stated above, all offsets are relative to
656 * ocfs2_dinode.id2, which is at 0xC0 in the inode.
657 * 0xC0 + 0x140 = 0x200 or 512 bytes. A superblock must fit within
658 * our smallest blocksize, which is 512 bytes. To ensure this,
659 * we reserve the space in s_reserved2. Anything past s_reserved2
660 * will not be available on the smallest blocksize.
665 * Local allocation bitmap for OCFS2 slots
666 * Note that it exists inside an ocfs2_dinode, so all offsets are
667 * relative to the start of ocfs2_dinode.id2.
669 struct ocfs2_local_alloc
671 /*00*/ __le32 la_bm_off; /* Starting bit offset in main bitmap */
672 __le16 la_size; /* Size of included bitmap, in bytes */
675 /*10*/ __u8 la_bitmap[0];
679 * Data-in-inode header. This is only used if i_dyn_features has
680 * OCFS2_INLINE_DATA_FL set.
682 struct ocfs2_inline_data
684 /*00*/ __le16 id_count; /* Number of bytes that can be used
685 * for data, starting at id_data */
688 __u8 id_data[0]; /* Start of user data */
692 * On disk inode for OCFS2
694 struct ocfs2_dinode {
695 /*00*/ __u8 i_signature[8]; /* Signature for validation */
696 __le32 i_generation; /* Generation number */
697 __le16 i_suballoc_slot; /* Slot suballocator this inode
699 __le16 i_suballoc_bit; /* Bit offset in suballocator
701 /*10*/ __le16 i_links_count_hi; /* High 16 bits of links count */
702 __le16 i_xattr_inline_size;
703 __le32 i_clusters; /* Cluster count */
704 __le32 i_uid; /* Owner UID */
705 __le32 i_gid; /* Owning GID */
706 /*20*/ __le64 i_size; /* Size in bytes */
707 __le16 i_mode; /* File mode */
708 __le16 i_links_count; /* Links count */
709 __le32 i_flags; /* File flags */
710 /*30*/ __le64 i_atime; /* Access time */
711 __le64 i_ctime; /* Creation time */
712 /*40*/ __le64 i_mtime; /* Modification time */
713 __le64 i_dtime; /* Deletion time */
714 /*50*/ __le64 i_blkno; /* Offset on disk, in blocks */
715 __le64 i_last_eb_blk; /* Pointer to last extent
717 /*60*/ __le32 i_fs_generation; /* Generation per fs-instance */
721 /*70*/ __le32 i_attr;
722 __le16 i_orphaned_slot; /* Only valid when OCFS2_ORPHANED_FL
723 was set in i_flags */
724 __le16 i_dyn_features;
726 /*80*/ struct ocfs2_block_check i_check; /* Error checking */
727 /*88*/ __le64 i_dx_root; /* Pointer to dir index root block */
728 /*90*/ __le64 i_refcount_loc;
729 __le64 i_reserved2[4];
731 __le64 i_pad1; /* Generic way to refer to this
734 __le64 i_rdev; /* Device number */
736 struct { /* Info for bitmap system
738 __le32 i_used; /* Bits (ie, clusters) used */
739 __le32 i_total; /* Total bits (clusters)
742 struct { /* Info for journal system
744 __le32 ij_flags; /* Mounted, version, etc. */
745 __le32 ij_recovery_generation; /* Incremented when the
750 } id1; /* Inode type dependant 1 */
752 struct ocfs2_super_block i_super;
753 struct ocfs2_local_alloc i_lab;
754 struct ocfs2_chain_list i_chain;
755 struct ocfs2_extent_list i_list;
756 struct ocfs2_truncate_log i_dealloc;
757 struct ocfs2_inline_data i_data;
760 /* Actual on-disk size is one block */
764 * On-disk directory entry structure for OCFS2
766 * Packed as this structure could be accessed unaligned on 64-bit platforms
768 struct ocfs2_dir_entry {
769 /*00*/ __le64 inode; /* Inode number */
770 __le16 rec_len; /* Directory entry length */
771 __u8 name_len; /* Name length */
773 /*0C*/ char name[OCFS2_MAX_FILENAME_LEN]; /* File name */
774 /* Actual on-disk length specified by rec_len */
775 } __attribute__ ((packed));
778 * Per-block record for the unindexed directory btree. This is carefully
779 * crafted so that the rec_len and name_len records of an ocfs2_dir_entry are
780 * mirrored. That way, the directory manipulation code needs a minimal amount
783 * NOTE: Keep this structure aligned to a multiple of 4 bytes.
785 struct ocfs2_dir_block_trailer {
786 /*00*/ __le64 db_compat_inode; /* Always zero. Was inode */
788 __le16 db_compat_rec_len; /* Backwards compatible with
789 * ocfs2_dir_entry. */
790 __u8 db_compat_name_len; /* Always zero. Was name_len */
793 __le16 db_free_rec_len; /* Size of largest empty hole
794 * in this block. (unused) */
795 /*10*/ __u8 db_signature[8]; /* Signature for verification */
797 __le64 db_free_next; /* Next block in list (unused) */
798 /*20*/ __le64 db_blkno; /* Offset on disk, in blocks */
799 __le64 db_parent_dinode; /* dinode which owns me, in
801 /*30*/ struct ocfs2_block_check db_check; /* Error checking */
806 * A directory entry in the indexed tree. We don't store the full name here,
807 * but instead provide a pointer to the full dirent in the unindexed tree.
809 * We also store name_len here so as to reduce the number of leaf blocks we
810 * need to search in case of collisions.
812 struct ocfs2_dx_entry {
813 __le32 dx_major_hash; /* Used to find logical
814 * cluster in index */
815 __le32 dx_minor_hash; /* Lower bits used to find
816 * block in cluster */
817 __le64 dx_dirent_blk; /* Physical block in unindexed
818 * tree holding this dirent. */
821 struct ocfs2_dx_entry_list {
823 __le16 de_count; /* Maximum number of entries
824 * possible in de_entries */
825 __le16 de_num_used; /* Current number of
826 * de_entries entries */
827 struct ocfs2_dx_entry de_entries[0]; /* Indexed dir entries
828 * in a packed array of
829 * length de_num_used */
832 #define OCFS2_DX_FLAG_INLINE 0x01
835 * A directory indexing block. Each indexed directory has one of these,
836 * pointed to by ocfs2_dinode.
838 * This block stores an indexed btree root, and a set of free space
839 * start-of-list pointers.
841 struct ocfs2_dx_root_block {
842 __u8 dr_signature[8]; /* Signature for verification */
843 struct ocfs2_block_check dr_check; /* Error checking */
844 __le16 dr_suballoc_slot; /* Slot suballocator this
845 * block belongs to. */
846 __le16 dr_suballoc_bit; /* Bit offset in suballocator
848 __le32 dr_fs_generation; /* Must match super block */
849 __le64 dr_blkno; /* Offset on disk, in blocks */
850 __le64 dr_last_eb_blk; /* Pointer to last
852 __le32 dr_clusters; /* Clusters allocated
853 * to the indexed tree. */
854 __u8 dr_flags; /* OCFS2_DX_FLAG_* flags */
857 __le64 dr_dir_blkno; /* Pointer to parent inode */
858 __le32 dr_num_entries; /* Total number of
862 __le64 dr_free_blk; /* Pointer to head of free
863 * unindexed block list. */
864 __le64 dr_reserved3[15];
866 struct ocfs2_extent_list dr_list; /* Keep this aligned to 128
867 * bits for maximum space
869 struct ocfs2_dx_entry_list dr_entries; /* In-root-block list of
870 * entries. We grow out
877 * The header of a leaf block in the indexed tree.
879 struct ocfs2_dx_leaf {
880 __u8 dl_signature[8];/* Signature for verification */
881 struct ocfs2_block_check dl_check; /* Error checking */
882 __le64 dl_blkno; /* Offset on disk, in blocks */
883 __le32 dl_fs_generation;/* Must match super block */
886 struct ocfs2_dx_entry_list dl_list;
890 * On disk allocator group structure for OCFS2
892 struct ocfs2_group_desc
894 /*00*/ __u8 bg_signature[8]; /* Signature for validation */
895 __le16 bg_size; /* Size of included bitmap in
897 __le16 bg_bits; /* Bits represented by this
899 __le16 bg_free_bits_count; /* Free bits count */
900 __le16 bg_chain; /* What chain I am in. */
901 /*10*/ __le32 bg_generation;
903 __le64 bg_next_group; /* Next group in my list, in
905 /*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in
907 __le64 bg_blkno; /* Offset on disk, in blocks */
908 /*30*/ struct ocfs2_block_check bg_check; /* Error checking */
910 /*40*/ __u8 bg_bitmap[0];
913 struct ocfs2_refcount_rec {
914 /*00*/ __le64 r_cpos; /* Physical offset, in clusters */
915 __le32 r_clusters; /* Clusters covered by this extent */
916 __le32 r_refcount; /* Reference count of this extent */
920 #define OCFS2_REFCOUNT_LEAF_FL (0x00000001)
921 #define OCFS2_REFCOUNT_TREE_FL (0x00000002)
923 struct ocfs2_refcount_list {
924 /*00*/ __le16 rl_count; /* Maximum number of entries possible
926 __le16 rl_used; /* Current number of used records */
928 __le64 rl_reserved1; /* Pad to sizeof(ocfs2_refcount_record) */
929 /*10*/ struct ocfs2_refcount_rec rl_recs[0]; /* Refcount records */
933 struct ocfs2_refcount_block {
934 /*00*/ __u8 rf_signature[8]; /* Signature for verification */
935 __le16 rf_suballoc_slot; /* Slot suballocator this block
937 __le16 rf_suballoc_bit; /* Bit offset in suballocator
939 __le32 rf_fs_generation; /* Must match superblock */
940 /*10*/ __le64 rf_blkno; /* Offset on disk, in blocks */
941 __le64 rf_parent; /* Parent block, only valid if
942 OCFS2_REFCOUNT_LEAF_FL is set in
944 /*20*/ struct ocfs2_block_check rf_check; /* Error checking */
945 __le64 rf_last_eb_blk; /* Pointer to last extent block */
946 /*30*/ __le32 rf_count; /* Number of inodes sharing this
948 __le32 rf_flags; /* See the flags above */
949 __le32 rf_clusters; /* clusters covered by refcount tree. */
950 __le32 rf_cpos; /* cluster offset in refcount tree.*/
951 /*40*/ __le32 rf_generation; /* generation number. all be the same
952 * for the same refcount tree. */
954 __le64 rf_reserved1[7];
956 struct ocfs2_refcount_list rf_records; /* List of refcount
958 struct ocfs2_extent_list rf_list; /* Extent record list,
960 OCFS2_REFCOUNT_TREE_FL
961 is set in rf_flags */
963 /* Actual on-disk size is one block */
967 * On disk extended attribute structure for OCFS2.
971 * ocfs2_xattr_entry indicates one extend attribute.
973 * Note that it can be stored in inode, one block or one xattr bucket.
975 struct ocfs2_xattr_entry {
976 __le32 xe_name_hash; /* hash value of xattr prefix+suffix. */
977 __le16 xe_name_offset; /* byte offset from the 1st entry in the
978 local xattr storage(inode, xattr block or
980 __u8 xe_name_len; /* xattr name len, does't include prefix. */
981 __u8 xe_type; /* the low 7 bits indicate the name prefix
982 * type and the highest bit indicates whether
983 * the EA is stored in the local storage. */
984 __le64 xe_value_size; /* real xattr value length. */
988 * On disk structure for xattr header.
990 * One ocfs2_xattr_header describes how many ocfs2_xattr_entry records in
991 * the local xattr storage.
993 struct ocfs2_xattr_header {
994 __le16 xh_count; /* contains the count of how
995 many records are in the
996 local xattr storage. */
997 __le16 xh_free_start; /* current offset for storing
999 __le16 xh_name_value_len; /* total length of name/value
1000 length in this bucket. */
1001 __le16 xh_num_buckets; /* Number of xattr buckets
1002 in this extent record,
1003 only valid in the first
1005 struct ocfs2_block_check xh_check; /* Error checking
1008 buckets. A block uses
1010 this field to zero.) */
1011 struct ocfs2_xattr_entry xh_entries[0]; /* xattr entry list. */
1015 * On disk structure for xattr value root.
1017 * When an xattr's value is large enough, it is stored in an external
1018 * b-tree like file data. The xattr value root points to this structure.
1020 struct ocfs2_xattr_value_root {
1021 /*00*/ __le32 xr_clusters; /* clusters covered by xattr value. */
1022 __le32 xr_reserved0;
1023 __le64 xr_last_eb_blk; /* Pointer to last extent block */
1024 /*10*/ struct ocfs2_extent_list xr_list; /* Extent record list */
1028 * On disk structure for xattr tree root.
1030 * It is used when there are too many extended attributes for one file. These
1031 * attributes will be organized and stored in an indexed-btree.
1033 struct ocfs2_xattr_tree_root {
1034 /*00*/ __le32 xt_clusters; /* clusters covered by xattr. */
1035 __le32 xt_reserved0;
1036 __le64 xt_last_eb_blk; /* Pointer to last extent block */
1037 /*10*/ struct ocfs2_extent_list xt_list; /* Extent record list */
1040 #define OCFS2_XATTR_INDEXED 0x1
1041 #define OCFS2_HASH_SHIFT 5
1042 #define OCFS2_XATTR_ROUND 3
1043 #define OCFS2_XATTR_SIZE(size) (((size) + OCFS2_XATTR_ROUND) & \
1044 ~(OCFS2_XATTR_ROUND))
1046 #define OCFS2_XATTR_BUCKET_SIZE 4096
1047 #define OCFS2_XATTR_MAX_BLOCKS_PER_BUCKET (OCFS2_XATTR_BUCKET_SIZE \
1048 / OCFS2_MIN_BLOCKSIZE)
1051 * On disk structure for xattr block.
1053 struct ocfs2_xattr_block {
1054 /*00*/ __u8 xb_signature[8]; /* Signature for verification */
1055 __le16 xb_suballoc_slot; /* Slot suballocator this
1056 block belongs to. */
1057 __le16 xb_suballoc_bit; /* Bit offset in suballocator
1059 __le32 xb_fs_generation; /* Must match super block */
1060 /*10*/ __le64 xb_blkno; /* Offset on disk, in blocks */
1061 struct ocfs2_block_check xb_check; /* Error checking */
1062 /*20*/ __le16 xb_flags; /* Indicates whether this block contains
1063 real xattr or a xattr tree. */
1064 __le16 xb_reserved0;
1065 __le32 xb_reserved1;
1066 __le64 xb_reserved2;
1068 struct ocfs2_xattr_header xb_header; /* xattr header if this
1069 block contains xattr */
1070 struct ocfs2_xattr_tree_root xb_root;/* xattr tree root if this
1076 #define OCFS2_XATTR_ENTRY_LOCAL 0x80
1077 #define OCFS2_XATTR_TYPE_MASK 0x7F
1078 static inline void ocfs2_xattr_set_local(struct ocfs2_xattr_entry *xe,
1082 xe->xe_type |= OCFS2_XATTR_ENTRY_LOCAL;
1084 xe->xe_type &= ~OCFS2_XATTR_ENTRY_LOCAL;
1087 static inline int ocfs2_xattr_is_local(struct ocfs2_xattr_entry *xe)
1089 return xe->xe_type & OCFS2_XATTR_ENTRY_LOCAL;
1092 static inline void ocfs2_xattr_set_type(struct ocfs2_xattr_entry *xe, int type)
1094 xe->xe_type |= type & OCFS2_XATTR_TYPE_MASK;
1097 static inline int ocfs2_xattr_get_type(struct ocfs2_xattr_entry *xe)
1099 return xe->xe_type & OCFS2_XATTR_TYPE_MASK;
1103 * On disk structures for global quota file
1106 /* Magic numbers and known versions for global quota files */
1107 #define OCFS2_GLOBAL_QMAGICS {\
1108 0x0cf52470, /* USRQUOTA */ \
1109 0x0cf52471 /* GRPQUOTA */ \
1112 #define OCFS2_GLOBAL_QVERSIONS {\
1118 /* Each block of each quota file has a certain fixed number of bytes reserved
1119 * for OCFS2 internal use at its end. OCFS2 can use it for things like
1120 * checksums, etc. */
1121 #define OCFS2_QBLK_RESERVED_SPACE 8
1123 /* Generic header of all quota files */
1124 struct ocfs2_disk_dqheader {
1125 __le32 dqh_magic; /* Magic number identifying file */
1126 __le32 dqh_version; /* Quota format version */
1129 #define OCFS2_GLOBAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader))
1131 /* Information header of global quota file (immediately follows the generic
1133 struct ocfs2_global_disk_dqinfo {
1134 /*00*/ __le32 dqi_bgrace; /* Grace time for space softlimit excess */
1135 __le32 dqi_igrace; /* Grace time for inode softlimit excess */
1136 __le32 dqi_syncms; /* Time after which we sync local changes to
1137 * global quota file */
1138 __le32 dqi_blocks; /* Number of blocks in quota file */
1139 /*10*/ __le32 dqi_free_blk; /* First free block in quota file */
1140 __le32 dqi_free_entry; /* First block with free dquot entry in quota
1144 /* Structure with global user / group information. We reserve some space
1145 * for future use. */
1146 struct ocfs2_global_disk_dqblk {
1147 /*00*/ __le32 dqb_id; /* ID the structure belongs to */
1148 __le32 dqb_use_count; /* Number of nodes having reference to this structure */
1149 __le64 dqb_ihardlimit; /* absolute limit on allocated inodes */
1150 /*10*/ __le64 dqb_isoftlimit; /* preferred inode limit */
1151 __le64 dqb_curinodes; /* current # allocated inodes */
1152 /*20*/ __le64 dqb_bhardlimit; /* absolute limit on disk space */
1153 __le64 dqb_bsoftlimit; /* preferred limit on disk space */
1154 /*30*/ __le64 dqb_curspace; /* current space occupied */
1155 __le64 dqb_btime; /* time limit for excessive disk use */
1156 /*40*/ __le64 dqb_itime; /* time limit for excessive inode use */
1158 /*50*/ __le64 dqb_pad2;
1162 * On-disk structures for local quota file
1165 /* Magic numbers and known versions for local quota files */
1166 #define OCFS2_LOCAL_QMAGICS {\
1167 0x0cf524c0, /* USRQUOTA */ \
1168 0x0cf524c1 /* GRPQUOTA */ \
1171 #define OCFS2_LOCAL_QVERSIONS {\
1176 /* Quota flags in dqinfo header */
1177 #define OLQF_CLEAN 0x0001 /* Quota file is empty (this should be after\
1178 * quota has been cleanly turned off) */
1180 #define OCFS2_LOCAL_INFO_OFF (sizeof(struct ocfs2_disk_dqheader))
1182 /* Information header of local quota file (immediately follows the generic
1184 struct ocfs2_local_disk_dqinfo {
1185 __le32 dqi_flags; /* Flags for quota file */
1186 __le32 dqi_chunks; /* Number of chunks of quota structures
1188 __le32 dqi_blocks; /* Number of blocks allocated for quota file */
1191 /* Header of one chunk of a quota file */
1192 struct ocfs2_local_disk_chunk {
1193 __le32 dqc_free; /* Number of free entries in the bitmap */
1194 u8 dqc_bitmap[0]; /* Bitmap of entries in the corresponding
1195 * chunk of quota file */
1198 /* One entry in local quota file */
1199 struct ocfs2_local_disk_dqblk {
1200 /*00*/ __le64 dqb_id; /* id this quota applies to */
1201 __le64 dqb_spacemod; /* Change in the amount of used space */
1202 /*10*/ __le64 dqb_inodemod; /* Change in the amount of used inodes */
1207 * The quota trailer lives at the end of each quota block.
1210 struct ocfs2_disk_dqtrailer {
1211 /*00*/ struct ocfs2_block_check dq_check; /* Error checking */
1212 /*08*/ /* Cannot be larger than OCFS2_QBLK_RESERVED_SPACE */
1215 static inline struct ocfs2_disk_dqtrailer *ocfs2_block_dqtrailer(int blocksize,
1219 ptr += blocksize - OCFS2_QBLK_RESERVED_SPACE;
1221 return (struct ocfs2_disk_dqtrailer *)ptr;
1225 static inline int ocfs2_fast_symlink_chars(struct super_block *sb)
1227 return sb->s_blocksize -
1228 offsetof(struct ocfs2_dinode, id2.i_symlink);
1231 static inline int ocfs2_max_inline_data_with_xattr(struct super_block *sb,
1232 struct ocfs2_dinode *di)
1234 unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size);
1236 if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL)
1237 return sb->s_blocksize -
1238 offsetof(struct ocfs2_dinode, id2.i_data.id_data) -
1241 return sb->s_blocksize -
1242 offsetof(struct ocfs2_dinode, id2.i_data.id_data);
1245 static inline int ocfs2_extent_recs_per_inode(struct super_block *sb)
1249 size = sb->s_blocksize -
1250 offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
1252 return size / sizeof(struct ocfs2_extent_rec);
1255 static inline int ocfs2_extent_recs_per_inode_with_xattr(
1256 struct super_block *sb,
1257 struct ocfs2_dinode *di)
1260 unsigned int xattrsize = le16_to_cpu(di->i_xattr_inline_size);
1262 if (le16_to_cpu(di->i_dyn_features) & OCFS2_INLINE_XATTR_FL)
1263 size = sb->s_blocksize -
1264 offsetof(struct ocfs2_dinode, id2.i_list.l_recs) -
1267 size = sb->s_blocksize -
1268 offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
1270 return size / sizeof(struct ocfs2_extent_rec);
1273 static inline int ocfs2_extent_recs_per_dx_root(struct super_block *sb)
1277 size = sb->s_blocksize -
1278 offsetof(struct ocfs2_dx_root_block, dr_list.l_recs);
1280 return size / sizeof(struct ocfs2_extent_rec);
1283 static inline int ocfs2_chain_recs_per_inode(struct super_block *sb)
1287 size = sb->s_blocksize -
1288 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
1290 return size / sizeof(struct ocfs2_chain_rec);
1293 static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb)
1297 size = sb->s_blocksize -
1298 offsetof(struct ocfs2_extent_block, h_list.l_recs);
1300 return size / sizeof(struct ocfs2_extent_rec);
1303 static inline int ocfs2_dx_entries_per_leaf(struct super_block *sb)
1307 size = sb->s_blocksize -
1308 offsetof(struct ocfs2_dx_leaf, dl_list.de_entries);
1310 return size / sizeof(struct ocfs2_dx_entry);
1313 static inline int ocfs2_dx_entries_per_root(struct super_block *sb)
1317 size = sb->s_blocksize -
1318 offsetof(struct ocfs2_dx_root_block, dr_entries.de_entries);
1320 return size / sizeof(struct ocfs2_dx_entry);
1323 static inline u16 ocfs2_local_alloc_size(struct super_block *sb)
1327 size = sb->s_blocksize -
1328 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
1333 static inline int ocfs2_group_bitmap_size(struct super_block *sb)
1337 size = sb->s_blocksize -
1338 offsetof(struct ocfs2_group_desc, bg_bitmap);
1343 static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb)
1347 size = sb->s_blocksize -
1348 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
1350 return size / sizeof(struct ocfs2_truncate_rec);
1353 static inline u64 ocfs2_backup_super_blkno(struct super_block *sb, int index)
1355 u64 offset = OCFS2_BACKUP_SB_START;
1357 if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) {
1358 offset <<= (2 * index);
1359 offset >>= sb->s_blocksize_bits;
1367 static inline u16 ocfs2_xattr_recs_per_xb(struct super_block *sb)
1371 size = sb->s_blocksize -
1372 offsetof(struct ocfs2_xattr_block,
1373 xb_attrs.xb_root.xt_list.l_recs);
1375 return size / sizeof(struct ocfs2_extent_rec);
1378 static inline u16 ocfs2_extent_recs_per_rb(struct super_block *sb)
1382 size = sb->s_blocksize -
1383 offsetof(struct ocfs2_refcount_block, rf_list.l_recs);
1385 return size / sizeof(struct ocfs2_extent_rec);
1388 static inline u16 ocfs2_refcount_recs_per_rb(struct super_block *sb)
1392 size = sb->s_blocksize -
1393 offsetof(struct ocfs2_refcount_block, rf_records.rl_recs);
1395 return size / sizeof(struct ocfs2_refcount_rec);
1398 static inline int ocfs2_fast_symlink_chars(int blocksize)
1400 return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink);
1403 static inline int ocfs2_max_inline_data(int blocksize)
1405 return blocksize - offsetof(struct ocfs2_dinode, id2.i_data.id_data);
1408 static inline int ocfs2_extent_recs_per_inode(int blocksize)
1413 offsetof(struct ocfs2_dinode, id2.i_list.l_recs);
1415 return size / sizeof(struct ocfs2_extent_rec);
1418 static inline int ocfs2_chain_recs_per_inode(int blocksize)
1423 offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs);
1425 return size / sizeof(struct ocfs2_chain_rec);
1428 static inline int ocfs2_extent_recs_per_eb(int blocksize)
1433 offsetof(struct ocfs2_extent_block, h_list.l_recs);
1435 return size / sizeof(struct ocfs2_extent_rec);
1438 static inline int ocfs2_local_alloc_size(int blocksize)
1443 offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap);
1448 static inline int ocfs2_group_bitmap_size(int blocksize)
1453 offsetof(struct ocfs2_group_desc, bg_bitmap);
1458 static inline int ocfs2_truncate_recs_per_inode(int blocksize)
1463 offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs);
1465 return size / sizeof(struct ocfs2_truncate_rec);
1468 static inline uint64_t ocfs2_backup_super_blkno(int blocksize, int index)
1470 uint64_t offset = OCFS2_BACKUP_SB_START;
1472 if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) {
1473 offset <<= (2 * index);
1474 offset /= blocksize;
1481 static inline int ocfs2_xattr_recs_per_xb(int blocksize)
1486 offsetof(struct ocfs2_xattr_block,
1487 xb_attrs.xb_root.xt_list.l_recs);
1489 return size / sizeof(struct ocfs2_extent_rec);
1491 #endif /* __KERNEL__ */
1494 static inline int ocfs2_system_inode_is_global(int type)
1496 return ((type >= 0) &&
1497 (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE));
1500 static inline int ocfs2_sprintf_system_inode_name(char *buf, int len,
1506 * Global system inodes can only have one copy. Everything
1507 * after OCFS2_LAST_GLOBAL_SYSTEM_INODE in the system inode
1508 * list has a copy per slot.
1510 if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)
1511 chars = snprintf(buf, len, "%s",
1512 ocfs2_system_inodes[type].si_name);
1514 chars = snprintf(buf, len,
1515 ocfs2_system_inodes[type].si_name,
1521 static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de,
1524 de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
1527 #endif /* _OCFS2_FS_H */