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ccd979bd MF |
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 | /* Version */ | |
29 | #define OCFS2_MAJOR_REV_LEVEL 0 | |
30 | #define OCFS2_MINOR_REV_LEVEL 90 | |
31 | ||
32 | /* | |
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. | |
37 | * | |
38 | * All other structures are found from the superblock information. | |
39 | * | |
40 | * OCFS2_SUPER_BLOCK_BLKNO is in blocks, not sectors. eg, for a | |
41 | * blocksize of 2K, it is 4096 bytes into disk. | |
42 | */ | |
43 | #define OCFS2_SUPER_BLOCK_BLKNO 2 | |
44 | ||
45 | /* | |
46 | * Cluster size limits. The maximum is kept arbitrarily at 1 MB, and could | |
47 | * grow if needed. | |
48 | */ | |
49 | #define OCFS2_MIN_CLUSTERSIZE 4096 | |
50 | #define OCFS2_MAX_CLUSTERSIZE 1048576 | |
51 | ||
52 | /* | |
53 | * Blocks cannot be bigger than clusters, so the maximum blocksize is the | |
54 | * minimum cluster size. | |
55 | */ | |
56 | #define OCFS2_MIN_BLOCKSIZE 512 | |
57 | #define OCFS2_MAX_BLOCKSIZE OCFS2_MIN_CLUSTERSIZE | |
58 | ||
59 | /* Filesystem magic number */ | |
60 | #define OCFS2_SUPER_MAGIC 0x7461636f | |
61 | ||
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" | |
5a7bc8eb | 67 | #define OCFS2_XATTR_BLOCK_SIGNATURE "XATTR01" |
ccd979bd MF |
68 | |
69 | /* Compatibility flags */ | |
70 | #define OCFS2_HAS_COMPAT_FEATURE(sb,mask) \ | |
71 | ( OCFS2_SB(sb)->s_feature_compat & (mask) ) | |
72 | #define OCFS2_HAS_RO_COMPAT_FEATURE(sb,mask) \ | |
73 | ( OCFS2_SB(sb)->s_feature_ro_compat & (mask) ) | |
74 | #define OCFS2_HAS_INCOMPAT_FEATURE(sb,mask) \ | |
75 | ( OCFS2_SB(sb)->s_feature_incompat & (mask) ) | |
76 | #define OCFS2_SET_COMPAT_FEATURE(sb,mask) \ | |
77 | OCFS2_SB(sb)->s_feature_compat |= (mask) | |
78 | #define OCFS2_SET_RO_COMPAT_FEATURE(sb,mask) \ | |
79 | OCFS2_SB(sb)->s_feature_ro_compat |= (mask) | |
80 | #define OCFS2_SET_INCOMPAT_FEATURE(sb,mask) \ | |
81 | OCFS2_SB(sb)->s_feature_incompat |= (mask) | |
82 | #define OCFS2_CLEAR_COMPAT_FEATURE(sb,mask) \ | |
83 | OCFS2_SB(sb)->s_feature_compat &= ~(mask) | |
84 | #define OCFS2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \ | |
85 | OCFS2_SB(sb)->s_feature_ro_compat &= ~(mask) | |
86 | #define OCFS2_CLEAR_INCOMPAT_FEATURE(sb,mask) \ | |
87 | OCFS2_SB(sb)->s_feature_incompat &= ~(mask) | |
88 | ||
50af94b1 | 89 | #define OCFS2_FEATURE_COMPAT_SUPP OCFS2_FEATURE_COMPAT_BACKUP_SB |
dcd0538f | 90 | #define OCFS2_FEATURE_INCOMPAT_SUPP (OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT \ |
15b1e36b | 91 | | OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC \ |
386a2ef8 | 92 | | OCFS2_FEATURE_INCOMPAT_INLINE_DATA \ |
b61817e1 JB |
93 | | OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP \ |
94 | | OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK) | |
328d5752 | 95 | #define OCFS2_FEATURE_RO_COMPAT_SUPP OCFS2_FEATURE_RO_COMPAT_UNWRITTEN |
ccd979bd MF |
96 | |
97 | /* | |
98 | * Heartbeat-only devices are missing journals and other files. The | |
99 | * filesystem driver can't load them, but the library can. Never put | |
100 | * this in OCFS2_FEATURE_INCOMPAT_SUPP, *ever*. | |
101 | */ | |
102 | #define OCFS2_FEATURE_INCOMPAT_HEARTBEAT_DEV 0x0002 | |
103 | ||
8903901d MF |
104 | /* |
105 | * tunefs sets this incompat flag before starting the resize and clears it | |
106 | * at the end. This flag protects users from inadvertently mounting the fs | |
107 | * after an aborted run without fsck-ing. | |
108 | */ | |
109 | #define OCFS2_FEATURE_INCOMPAT_RESIZE_INPROG 0x0004 | |
ccd979bd | 110 | |
c271c5c2 SM |
111 | /* Used to denote a non-clustered volume */ |
112 | #define OCFS2_FEATURE_INCOMPAT_LOCAL_MOUNT 0x0008 | |
113 | ||
8903901d MF |
114 | /* Support for sparse allocation in b-trees */ |
115 | #define OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC 0x0010 | |
116 | ||
92e91ce2 MF |
117 | /* |
118 | * Tunefs sets this incompat flag before starting an operation which | |
119 | * would require cleanup on abort. This is done to protect users from | |
120 | * inadvertently mounting the fs after an aborted run without | |
121 | * fsck-ing. | |
122 | * | |
123 | * s_tunefs_flags on the super block describes precisely which | |
124 | * operations were in progress. | |
125 | */ | |
126 | #define OCFS2_FEATURE_INCOMPAT_TUNEFS_INPROG 0x0020 | |
127 | ||
15b1e36b MF |
128 | /* Support for data packed into inode blocks */ |
129 | #define OCFS2_FEATURE_INCOMPAT_INLINE_DATA 0x0040 | |
130 | ||
386a2ef8 JB |
131 | /* Support for the extended slot map */ |
132 | #define OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP 0x100 | |
133 | ||
134 | ||
b61817e1 JB |
135 | /* |
136 | * Support for alternate, userspace cluster stacks. If set, the superblock | |
137 | * field s_cluster_info contains a tag for the alternate stack in use as | |
138 | * well as the name of the cluster being joined. | |
139 | * mount.ocfs2 must pass in a matching stack name. | |
140 | * | |
141 | * If not set, the classic stack will be used. This is compatbile with | |
142 | * all older versions. | |
143 | */ | |
144 | #define OCFS2_FEATURE_INCOMPAT_USERSPACE_STACK 0x0080 | |
145 | ||
50af94b1 MF |
146 | /* |
147 | * backup superblock flag is used to indicate that this volume | |
148 | * has backup superblocks. | |
149 | */ | |
150 | #define OCFS2_FEATURE_COMPAT_BACKUP_SB 0x0001 | |
151 | ||
328d5752 MF |
152 | /* |
153 | * Unwritten extents support. | |
154 | */ | |
155 | #define OCFS2_FEATURE_RO_COMPAT_UNWRITTEN 0x0001 | |
156 | ||
50af94b1 MF |
157 | /* The byte offset of the first backup block will be 1G. |
158 | * The following will be 4G, 16G, 64G, 256G and 1T. | |
159 | */ | |
160 | #define OCFS2_BACKUP_SB_START 1 << 30 | |
161 | ||
162 | /* the max backup superblock nums */ | |
163 | #define OCFS2_MAX_BACKUP_SUPERBLOCKS 6 | |
164 | ||
92e91ce2 MF |
165 | /* |
166 | * Flags on ocfs2_super_block.s_tunefs_flags | |
167 | */ | |
168 | #define OCFS2_TUNEFS_INPROG_REMOVE_SLOT 0x0001 /* Removing slots */ | |
169 | ||
ccd979bd MF |
170 | /* |
171 | * Flags on ocfs2_dinode.i_flags | |
172 | */ | |
173 | #define OCFS2_VALID_FL (0x00000001) /* Inode is valid */ | |
174 | #define OCFS2_UNUSED2_FL (0x00000002) | |
175 | #define OCFS2_ORPHANED_FL (0x00000004) /* On the orphan list */ | |
176 | #define OCFS2_UNUSED3_FL (0x00000008) | |
177 | /* System inode flags */ | |
178 | #define OCFS2_SYSTEM_FL (0x00000010) /* System inode */ | |
179 | #define OCFS2_SUPER_BLOCK_FL (0x00000020) /* Super block */ | |
180 | #define OCFS2_LOCAL_ALLOC_FL (0x00000040) /* Slot local alloc bitmap */ | |
181 | #define OCFS2_BITMAP_FL (0x00000080) /* Allocation bitmap */ | |
182 | #define OCFS2_JOURNAL_FL (0x00000100) /* Slot local journal */ | |
183 | #define OCFS2_HEARTBEAT_FL (0x00000200) /* Heartbeat area */ | |
184 | #define OCFS2_CHAIN_FL (0x00000400) /* Chain allocator */ | |
185 | #define OCFS2_DEALLOC_FL (0x00000800) /* Truncate log */ | |
186 | ||
15b1e36b MF |
187 | /* |
188 | * Flags on ocfs2_dinode.i_dyn_features | |
189 | * | |
190 | * These can change much more often than i_flags. When adding flags, | |
191 | * keep in mind that i_dyn_features is only 16 bits wide. | |
192 | */ | |
193 | #define OCFS2_INLINE_DATA_FL (0x0001) /* Data stored in inode block */ | |
194 | #define OCFS2_HAS_XATTR_FL (0x0002) | |
195 | #define OCFS2_INLINE_XATTR_FL (0x0004) | |
196 | #define OCFS2_INDEXED_DIR_FL (0x0008) | |
197 | ||
ca4d147e HP |
198 | /* Inode attributes, keep in sync with EXT2 */ |
199 | #define OCFS2_SECRM_FL (0x00000001) /* Secure deletion */ | |
200 | #define OCFS2_UNRM_FL (0x00000002) /* Undelete */ | |
201 | #define OCFS2_COMPR_FL (0x00000004) /* Compress file */ | |
202 | #define OCFS2_SYNC_FL (0x00000008) /* Synchronous updates */ | |
203 | #define OCFS2_IMMUTABLE_FL (0x00000010) /* Immutable file */ | |
204 | #define OCFS2_APPEND_FL (0x00000020) /* writes to file may only append */ | |
205 | #define OCFS2_NODUMP_FL (0x00000040) /* do not dump file */ | |
206 | #define OCFS2_NOATIME_FL (0x00000080) /* do not update atime */ | |
207 | #define OCFS2_DIRSYNC_FL (0x00010000) /* dirsync behaviour (directories only) */ | |
208 | ||
209 | #define OCFS2_FL_VISIBLE (0x000100FF) /* User visible flags */ | |
210 | #define OCFS2_FL_MODIFIABLE (0x000100FF) /* User modifiable flags */ | |
211 | ||
e48edee2 MF |
212 | /* |
213 | * Extent record flags (e_node.leaf.flags) | |
214 | */ | |
215 | #define OCFS2_EXT_UNWRITTEN (0x01) /* Extent is allocated but | |
216 | * unwritten */ | |
217 | ||
ca4d147e HP |
218 | /* |
219 | * ioctl commands | |
220 | */ | |
221 | #define OCFS2_IOC_GETFLAGS _IOR('f', 1, long) | |
222 | #define OCFS2_IOC_SETFLAGS _IOW('f', 2, long) | |
586d232b MF |
223 | #define OCFS2_IOC32_GETFLAGS _IOR('f', 1, int) |
224 | #define OCFS2_IOC32_SETFLAGS _IOW('f', 2, int) | |
ca4d147e | 225 | |
b2580103 MF |
226 | /* |
227 | * Space reservation / allocation / free ioctls and argument structure | |
228 | * are designed to be compatible with XFS. | |
229 | * | |
230 | * ALLOCSP* and FREESP* are not and will never be supported, but are | |
231 | * included here for completeness. | |
232 | */ | |
233 | struct ocfs2_space_resv { | |
234 | __s16 l_type; | |
235 | __s16 l_whence; | |
236 | __s64 l_start; | |
237 | __s64 l_len; /* len == 0 means until end of file */ | |
238 | __s32 l_sysid; | |
239 | __u32 l_pid; | |
240 | __s32 l_pad[4]; /* reserve area */ | |
241 | }; | |
242 | ||
243 | #define OCFS2_IOC_ALLOCSP _IOW ('X', 10, struct ocfs2_space_resv) | |
244 | #define OCFS2_IOC_FREESP _IOW ('X', 11, struct ocfs2_space_resv) | |
245 | #define OCFS2_IOC_RESVSP _IOW ('X', 40, struct ocfs2_space_resv) | |
246 | #define OCFS2_IOC_UNRESVSP _IOW ('X', 41, struct ocfs2_space_resv) | |
247 | #define OCFS2_IOC_ALLOCSP64 _IOW ('X', 36, struct ocfs2_space_resv) | |
248 | #define OCFS2_IOC_FREESP64 _IOW ('X', 37, struct ocfs2_space_resv) | |
249 | #define OCFS2_IOC_RESVSP64 _IOW ('X', 42, struct ocfs2_space_resv) | |
250 | #define OCFS2_IOC_UNRESVSP64 _IOW ('X', 43, struct ocfs2_space_resv) | |
251 | ||
7909f2bf TM |
252 | /* Used to pass group descriptor data when online resize is done */ |
253 | struct ocfs2_new_group_input { | |
254 | __u64 group; /* Group descriptor's blkno. */ | |
255 | __u32 clusters; /* Total number of clusters in this group */ | |
256 | __u32 frees; /* Total free clusters in this group */ | |
257 | __u16 chain; /* Chain for this group */ | |
258 | __u16 reserved1; | |
259 | __u32 reserved2; | |
260 | }; | |
261 | ||
d659072f | 262 | #define OCFS2_IOC_GROUP_EXTEND _IOW('o', 1, int) |
7909f2bf TM |
263 | #define OCFS2_IOC_GROUP_ADD _IOW('o', 2,struct ocfs2_new_group_input) |
264 | #define OCFS2_IOC_GROUP_ADD64 _IOW('o', 3,struct ocfs2_new_group_input) | |
d659072f | 265 | |
ccd979bd MF |
266 | /* |
267 | * Journal Flags (ocfs2_dinode.id1.journal1.i_flags) | |
268 | */ | |
269 | #define OCFS2_JOURNAL_DIRTY_FL (0x00000001) /* Journal needs recovery */ | |
270 | ||
271 | /* | |
272 | * superblock s_state flags | |
273 | */ | |
274 | #define OCFS2_ERROR_FS (0x00000001) /* FS saw errors */ | |
275 | ||
276 | /* Limit of space in ocfs2_dir_entry */ | |
277 | #define OCFS2_MAX_FILENAME_LEN 255 | |
278 | ||
279 | /* Maximum slots on an ocfs2 file system */ | |
280 | #define OCFS2_MAX_SLOTS 255 | |
281 | ||
282 | /* Slot map indicator for an empty slot */ | |
283 | #define OCFS2_INVALID_SLOT -1 | |
284 | ||
285 | #define OCFS2_VOL_UUID_LEN 16 | |
286 | #define OCFS2_MAX_VOL_LABEL_LEN 64 | |
287 | ||
b61817e1 JB |
288 | /* The alternate, userspace stack fields */ |
289 | #define OCFS2_STACK_LABEL_LEN 4 | |
290 | #define OCFS2_CLUSTER_NAME_LEN 16 | |
291 | ||
ccd979bd MF |
292 | /* Journal limits (in bytes) */ |
293 | #define OCFS2_MIN_JOURNAL_SIZE (4 * 1024 * 1024) | |
ccd979bd | 294 | |
2fbe8d1e SM |
295 | /* |
296 | * Default local alloc size (in megabytes) | |
297 | * | |
298 | * The value chosen should be such that most allocations, including new | |
299 | * block groups, use local alloc. | |
300 | */ | |
301 | #define OCFS2_DEFAULT_LOCAL_ALLOC_SIZE 8 | |
302 | ||
ccd979bd MF |
303 | struct ocfs2_system_inode_info { |
304 | char *si_name; | |
305 | int si_iflags; | |
306 | int si_mode; | |
307 | }; | |
308 | ||
309 | /* System file index */ | |
310 | enum { | |
311 | BAD_BLOCK_SYSTEM_INODE = 0, | |
312 | GLOBAL_INODE_ALLOC_SYSTEM_INODE, | |
313 | SLOT_MAP_SYSTEM_INODE, | |
314 | #define OCFS2_FIRST_ONLINE_SYSTEM_INODE SLOT_MAP_SYSTEM_INODE | |
315 | HEARTBEAT_SYSTEM_INODE, | |
316 | GLOBAL_BITMAP_SYSTEM_INODE, | |
317 | #define OCFS2_LAST_GLOBAL_SYSTEM_INODE GLOBAL_BITMAP_SYSTEM_INODE | |
318 | ORPHAN_DIR_SYSTEM_INODE, | |
319 | EXTENT_ALLOC_SYSTEM_INODE, | |
320 | INODE_ALLOC_SYSTEM_INODE, | |
321 | JOURNAL_SYSTEM_INODE, | |
322 | LOCAL_ALLOC_SYSTEM_INODE, | |
323 | TRUNCATE_LOG_SYSTEM_INODE, | |
324 | NUM_SYSTEM_INODES | |
325 | }; | |
326 | ||
327 | static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = { | |
328 | /* Global system inodes (single copy) */ | |
329 | /* The first two are only used from userspace mfks/tunefs */ | |
330 | [BAD_BLOCK_SYSTEM_INODE] = { "bad_blocks", 0, S_IFREG | 0644 }, | |
331 | [GLOBAL_INODE_ALLOC_SYSTEM_INODE] = { "global_inode_alloc", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, | |
332 | ||
333 | /* These are used by the running filesystem */ | |
334 | [SLOT_MAP_SYSTEM_INODE] = { "slot_map", 0, S_IFREG | 0644 }, | |
335 | [HEARTBEAT_SYSTEM_INODE] = { "heartbeat", OCFS2_HEARTBEAT_FL, S_IFREG | 0644 }, | |
336 | [GLOBAL_BITMAP_SYSTEM_INODE] = { "global_bitmap", 0, S_IFREG | 0644 }, | |
337 | ||
338 | /* Slot-specific system inodes (one copy per slot) */ | |
339 | [ORPHAN_DIR_SYSTEM_INODE] = { "orphan_dir:%04d", 0, S_IFDIR | 0755 }, | |
340 | [EXTENT_ALLOC_SYSTEM_INODE] = { "extent_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, | |
341 | [INODE_ALLOC_SYSTEM_INODE] = { "inode_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_CHAIN_FL, S_IFREG | 0644 }, | |
342 | [JOURNAL_SYSTEM_INODE] = { "journal:%04d", OCFS2_JOURNAL_FL, S_IFREG | 0644 }, | |
343 | [LOCAL_ALLOC_SYSTEM_INODE] = { "local_alloc:%04d", OCFS2_BITMAP_FL | OCFS2_LOCAL_ALLOC_FL, S_IFREG | 0644 }, | |
344 | [TRUNCATE_LOG_SYSTEM_INODE] = { "truncate_log:%04d", OCFS2_DEALLOC_FL, S_IFREG | 0644 } | |
345 | }; | |
346 | ||
347 | /* Parameter passed from mount.ocfs2 to module */ | |
348 | #define OCFS2_HB_NONE "heartbeat=none" | |
349 | #define OCFS2_HB_LOCAL "heartbeat=local" | |
350 | ||
351 | /* | |
352 | * OCFS2 directory file types. Only the low 3 bits are used. The | |
353 | * other bits are reserved for now. | |
354 | */ | |
355 | #define OCFS2_FT_UNKNOWN 0 | |
356 | #define OCFS2_FT_REG_FILE 1 | |
357 | #define OCFS2_FT_DIR 2 | |
358 | #define OCFS2_FT_CHRDEV 3 | |
359 | #define OCFS2_FT_BLKDEV 4 | |
360 | #define OCFS2_FT_FIFO 5 | |
361 | #define OCFS2_FT_SOCK 6 | |
362 | #define OCFS2_FT_SYMLINK 7 | |
363 | ||
364 | #define OCFS2_FT_MAX 8 | |
365 | ||
366 | /* | |
367 | * OCFS2_DIR_PAD defines the directory entries boundaries | |
368 | * | |
369 | * NOTE: It must be a multiple of 4 | |
370 | */ | |
371 | #define OCFS2_DIR_PAD 4 | |
372 | #define OCFS2_DIR_ROUND (OCFS2_DIR_PAD - 1) | |
373 | #define OCFS2_DIR_MEMBER_LEN offsetof(struct ocfs2_dir_entry, name) | |
374 | #define OCFS2_DIR_REC_LEN(name_len) (((name_len) + OCFS2_DIR_MEMBER_LEN + \ | |
375 | OCFS2_DIR_ROUND) & \ | |
376 | ~OCFS2_DIR_ROUND) | |
377 | ||
378 | #define OCFS2_LINK_MAX 32000 | |
379 | ||
380 | #define S_SHIFT 12 | |
381 | static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = { | |
382 | [S_IFREG >> S_SHIFT] = OCFS2_FT_REG_FILE, | |
383 | [S_IFDIR >> S_SHIFT] = OCFS2_FT_DIR, | |
384 | [S_IFCHR >> S_SHIFT] = OCFS2_FT_CHRDEV, | |
385 | [S_IFBLK >> S_SHIFT] = OCFS2_FT_BLKDEV, | |
386 | [S_IFIFO >> S_SHIFT] = OCFS2_FT_FIFO, | |
387 | [S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK, | |
388 | [S_IFLNK >> S_SHIFT] = OCFS2_FT_SYMLINK, | |
389 | }; | |
390 | ||
391 | ||
392 | /* | |
393 | * Convenience casts | |
394 | */ | |
395 | #define OCFS2_RAW_SB(dinode) (&((dinode)->id2.i_super)) | |
396 | ||
397 | /* | |
398 | * On disk extent record for OCFS2 | |
399 | * It describes a range of clusters on disk. | |
e48edee2 MF |
400 | * |
401 | * Length fields are divided into interior and leaf node versions. | |
402 | * This leaves room for a flags field (OCFS2_EXT_*) in the leaf nodes. | |
ccd979bd MF |
403 | */ |
404 | struct ocfs2_extent_rec { | |
405 | /*00*/ __le32 e_cpos; /* Offset into the file, in clusters */ | |
e48edee2 MF |
406 | union { |
407 | __le32 e_int_clusters; /* Clusters covered by all children */ | |
408 | struct { | |
409 | __le16 e_leaf_clusters; /* Clusters covered by this | |
410 | extent */ | |
411 | __u8 e_reserved1; | |
412 | __u8 e_flags; /* Extent flags */ | |
413 | }; | |
414 | }; | |
ccd979bd MF |
415 | __le64 e_blkno; /* Physical disk offset, in blocks */ |
416 | /*10*/ | |
417 | }; | |
418 | ||
419 | struct ocfs2_chain_rec { | |
420 | __le32 c_free; /* Number of free bits in this chain. */ | |
421 | __le32 c_total; /* Number of total bits in this chain */ | |
422 | __le64 c_blkno; /* Physical disk offset (blocks) of 1st group */ | |
423 | }; | |
424 | ||
425 | struct ocfs2_truncate_rec { | |
426 | __le32 t_start; /* 1st cluster in this log */ | |
427 | __le32 t_clusters; /* Number of total clusters covered */ | |
428 | }; | |
429 | ||
430 | /* | |
431 | * On disk extent list for OCFS2 (node in the tree). Note that this | |
432 | * is contained inside ocfs2_dinode or ocfs2_extent_block, so the | |
433 | * offsets are relative to ocfs2_dinode.id2.i_list or | |
434 | * ocfs2_extent_block.h_list, respectively. | |
435 | */ | |
436 | struct ocfs2_extent_list { | |
437 | /*00*/ __le16 l_tree_depth; /* Extent tree depth from this | |
438 | point. 0 means data extents | |
439 | hang directly off this | |
dcd0538f MF |
440 | header (a leaf) |
441 | NOTE: The high 8 bits cannot be | |
442 | used - tree_depth is never that big. | |
443 | */ | |
ccd979bd MF |
444 | __le16 l_count; /* Number of extent records */ |
445 | __le16 l_next_free_rec; /* Next unused extent slot */ | |
446 | __le16 l_reserved1; | |
447 | __le64 l_reserved2; /* Pad to | |
448 | sizeof(ocfs2_extent_rec) */ | |
449 | /*10*/ struct ocfs2_extent_rec l_recs[0]; /* Extent records */ | |
450 | }; | |
451 | ||
452 | /* | |
453 | * On disk allocation chain list for OCFS2. Note that this is | |
454 | * contained inside ocfs2_dinode, so the offsets are relative to | |
455 | * ocfs2_dinode.id2.i_chain. | |
456 | */ | |
457 | struct ocfs2_chain_list { | |
458 | /*00*/ __le16 cl_cpg; /* Clusters per Block Group */ | |
459 | __le16 cl_bpc; /* Bits per cluster */ | |
460 | __le16 cl_count; /* Total chains in this list */ | |
461 | __le16 cl_next_free_rec; /* Next unused chain slot */ | |
462 | __le64 cl_reserved1; | |
463 | /*10*/ struct ocfs2_chain_rec cl_recs[0]; /* Chain records */ | |
464 | }; | |
465 | ||
466 | /* | |
467 | * On disk deallocation log for OCFS2. Note that this is | |
468 | * contained inside ocfs2_dinode, so the offsets are relative to | |
469 | * ocfs2_dinode.id2.i_dealloc. | |
470 | */ | |
471 | struct ocfs2_truncate_log { | |
472 | /*00*/ __le16 tl_count; /* Total records in this log */ | |
473 | __le16 tl_used; /* Number of records in use */ | |
474 | __le32 tl_reserved1; | |
475 | /*08*/ struct ocfs2_truncate_rec tl_recs[0]; /* Truncate records */ | |
476 | }; | |
477 | ||
478 | /* | |
479 | * On disk extent block (indirect block) for OCFS2 | |
480 | */ | |
481 | struct ocfs2_extent_block | |
482 | { | |
483 | /*00*/ __u8 h_signature[8]; /* Signature for verification */ | |
484 | __le64 h_reserved1; | |
485 | /*10*/ __le16 h_suballoc_slot; /* Slot suballocator this | |
486 | extent_header belongs to */ | |
487 | __le16 h_suballoc_bit; /* Bit offset in suballocator | |
488 | block group */ | |
489 | __le32 h_fs_generation; /* Must match super block */ | |
490 | __le64 h_blkno; /* Offset on disk, in blocks */ | |
491 | /*20*/ __le64 h_reserved3; | |
492 | __le64 h_next_leaf_blk; /* Offset on disk, in blocks, | |
493 | of next leaf header pointing | |
494 | to data */ | |
495 | /*30*/ struct ocfs2_extent_list h_list; /* Extent record list */ | |
496 | /* Actual on-disk size is one block */ | |
497 | }; | |
498 | ||
fb86b1f0 JB |
499 | /* |
500 | * On disk slot map for OCFS2. This defines the contents of the "slot_map" | |
386a2ef8 JB |
501 | * system file. A slot is valid if it contains a node number >= 0. The |
502 | * value -1 (0xFFFF) is OCFS2_INVALID_SLOT. This marks a slot empty. | |
fb86b1f0 JB |
503 | */ |
504 | struct ocfs2_slot_map { | |
505 | /*00*/ __le16 sm_slots[0]; | |
506 | /* | |
507 | * Actual on-disk size is one block. OCFS2_MAX_SLOTS is 255, | |
508 | * 255 * sizeof(__le16) == 512B, within the 512B block minimum blocksize. | |
509 | */ | |
510 | }; | |
511 | ||
386a2ef8 JB |
512 | struct ocfs2_extended_slot { |
513 | /*00*/ __u8 es_valid; | |
514 | __u8 es_reserved1[3]; | |
515 | __le32 es_node_num; | |
516 | /*10*/ | |
517 | }; | |
518 | ||
519 | /* | |
520 | * The extended slot map, used when OCFS2_FEATURE_INCOMPAT_EXTENDED_SLOT_MAP | |
521 | * is set. It separates out the valid marker from the node number, and | |
522 | * has room to grow. Unlike the old slot map, this format is defined by | |
523 | * i_size. | |
524 | */ | |
525 | struct ocfs2_slot_map_extended { | |
526 | /*00*/ struct ocfs2_extended_slot se_slots[0]; | |
527 | /* | |
528 | * Actual size is i_size of the slot_map system file. It should | |
529 | * match s_max_slots * sizeof(struct ocfs2_extended_slot) | |
530 | */ | |
531 | }; | |
532 | ||
b61817e1 JB |
533 | struct ocfs2_cluster_info { |
534 | /*00*/ __u8 ci_stack[OCFS2_STACK_LABEL_LEN]; | |
535 | __le32 ci_reserved; | |
536 | /*08*/ __u8 ci_cluster[OCFS2_CLUSTER_NAME_LEN]; | |
537 | /*18*/ | |
538 | }; | |
539 | ||
ccd979bd MF |
540 | /* |
541 | * On disk superblock for OCFS2 | |
542 | * Note that it is contained inside an ocfs2_dinode, so all offsets | |
543 | * are relative to the start of ocfs2_dinode.id2. | |
544 | */ | |
545 | struct ocfs2_super_block { | |
546 | /*00*/ __le16 s_major_rev_level; | |
547 | __le16 s_minor_rev_level; | |
548 | __le16 s_mnt_count; | |
549 | __le16 s_max_mnt_count; | |
550 | __le16 s_state; /* File system state */ | |
551 | __le16 s_errors; /* Behaviour when detecting errors */ | |
552 | __le32 s_checkinterval; /* Max time between checks */ | |
553 | /*10*/ __le64 s_lastcheck; /* Time of last check */ | |
554 | __le32 s_creator_os; /* OS */ | |
555 | __le32 s_feature_compat; /* Compatible feature set */ | |
556 | /*20*/ __le32 s_feature_incompat; /* Incompatible feature set */ | |
557 | __le32 s_feature_ro_compat; /* Readonly-compatible feature set */ | |
558 | __le64 s_root_blkno; /* Offset, in blocks, of root directory | |
559 | dinode */ | |
560 | /*30*/ __le64 s_system_dir_blkno; /* Offset, in blocks, of system | |
561 | directory dinode */ | |
562 | __le32 s_blocksize_bits; /* Blocksize for this fs */ | |
563 | __le32 s_clustersize_bits; /* Clustersize for this fs */ | |
564 | /*40*/ __le16 s_max_slots; /* Max number of simultaneous mounts | |
565 | before tunefs required */ | |
92e91ce2 MF |
566 | __le16 s_tunefs_flag; |
567 | __le32 s_reserved1; | |
ccd979bd MF |
568 | __le64 s_first_cluster_group; /* Block offset of 1st cluster |
569 | * group header */ | |
570 | /*50*/ __u8 s_label[OCFS2_MAX_VOL_LABEL_LEN]; /* Label for mounting, etc. */ | |
571 | /*90*/ __u8 s_uuid[OCFS2_VOL_UUID_LEN]; /* 128-bit uuid */ | |
b61817e1 JB |
572 | /*A0*/ struct ocfs2_cluster_info s_cluster_info; /* Selected userspace |
573 | stack. Only valid | |
574 | with INCOMPAT flag. */ | |
575 | /*B8*/ __le64 s_reserved2[17]; /* Fill out superblock */ | |
576 | /*140*/ | |
577 | ||
578 | /* | |
579 | * NOTE: As stated above, all offsets are relative to | |
580 | * ocfs2_dinode.id2, which is at 0xC0 in the inode. | |
581 | * 0xC0 + 0x140 = 0x200 or 512 bytes. A superblock must fit within | |
582 | * our smallest blocksize, which is 512 bytes. To ensure this, | |
583 | * we reserve the space in s_reserved2. Anything past s_reserved2 | |
584 | * will not be available on the smallest blocksize. | |
585 | */ | |
ccd979bd MF |
586 | }; |
587 | ||
588 | /* | |
589 | * Local allocation bitmap for OCFS2 slots | |
590 | * Note that it exists inside an ocfs2_dinode, so all offsets are | |
591 | * relative to the start of ocfs2_dinode.id2. | |
592 | */ | |
593 | struct ocfs2_local_alloc | |
594 | { | |
595 | /*00*/ __le32 la_bm_off; /* Starting bit offset in main bitmap */ | |
596 | __le16 la_size; /* Size of included bitmap, in bytes */ | |
597 | __le16 la_reserved1; | |
598 | __le64 la_reserved2; | |
599 | /*10*/ __u8 la_bitmap[0]; | |
600 | }; | |
601 | ||
15b1e36b MF |
602 | /* |
603 | * Data-in-inode header. This is only used if i_dyn_features has | |
604 | * OCFS2_INLINE_DATA_FL set. | |
605 | */ | |
606 | struct ocfs2_inline_data | |
607 | { | |
608 | /*00*/ __le16 id_count; /* Number of bytes that can be used | |
609 | * for data, starting at id_data */ | |
610 | __le16 id_reserved0; | |
611 | __le32 id_reserved1; | |
612 | __u8 id_data[0]; /* Start of user data */ | |
613 | }; | |
614 | ||
ccd979bd MF |
615 | /* |
616 | * On disk inode for OCFS2 | |
617 | */ | |
618 | struct ocfs2_dinode { | |
619 | /*00*/ __u8 i_signature[8]; /* Signature for validation */ | |
620 | __le32 i_generation; /* Generation number */ | |
621 | __le16 i_suballoc_slot; /* Slot suballocator this inode | |
622 | belongs to */ | |
623 | __le16 i_suballoc_bit; /* Bit offset in suballocator | |
624 | block group */ | |
625 | /*10*/ __le32 i_reserved0; | |
626 | __le32 i_clusters; /* Cluster count */ | |
627 | __le32 i_uid; /* Owner UID */ | |
628 | __le32 i_gid; /* Owning GID */ | |
629 | /*20*/ __le64 i_size; /* Size in bytes */ | |
630 | __le16 i_mode; /* File mode */ | |
631 | __le16 i_links_count; /* Links count */ | |
632 | __le32 i_flags; /* File flags */ | |
633 | /*30*/ __le64 i_atime; /* Access time */ | |
634 | __le64 i_ctime; /* Creation time */ | |
635 | /*40*/ __le64 i_mtime; /* Modification time */ | |
636 | __le64 i_dtime; /* Deletion time */ | |
637 | /*50*/ __le64 i_blkno; /* Offset on disk, in blocks */ | |
638 | __le64 i_last_eb_blk; /* Pointer to last extent | |
639 | block */ | |
640 | /*60*/ __le32 i_fs_generation; /* Generation per fs-instance */ | |
641 | __le32 i_atime_nsec; | |
642 | __le32 i_ctime_nsec; | |
643 | __le32 i_mtime_nsec; | |
ca4d147e | 644 | __le32 i_attr; |
50008630 TY |
645 | __le16 i_orphaned_slot; /* Only valid when OCFS2_ORPHANED_FL |
646 | was set in i_flags */ | |
15b1e36b | 647 | __le16 i_dyn_features; |
ca4d147e | 648 | /*70*/ __le64 i_reserved2[8]; |
ccd979bd MF |
649 | /*B8*/ union { |
650 | __le64 i_pad1; /* Generic way to refer to this | |
651 | 64bit union */ | |
652 | struct { | |
653 | __le64 i_rdev; /* Device number */ | |
654 | } dev1; | |
655 | struct { /* Info for bitmap system | |
656 | inodes */ | |
657 | __le32 i_used; /* Bits (ie, clusters) used */ | |
658 | __le32 i_total; /* Total bits (clusters) | |
659 | available */ | |
660 | } bitmap1; | |
661 | struct { /* Info for journal system | |
662 | inodes */ | |
663 | __le32 ij_flags; /* Mounted, version, etc. */ | |
c69991aa SM |
664 | __le32 ij_recovery_generation; /* Incremented when the |
665 | journal is recovered | |
666 | after an unclean | |
667 | shutdown */ | |
ccd979bd MF |
668 | } journal1; |
669 | } id1; /* Inode type dependant 1 */ | |
670 | /*C0*/ union { | |
671 | struct ocfs2_super_block i_super; | |
672 | struct ocfs2_local_alloc i_lab; | |
673 | struct ocfs2_chain_list i_chain; | |
674 | struct ocfs2_extent_list i_list; | |
675 | struct ocfs2_truncate_log i_dealloc; | |
15b1e36b | 676 | struct ocfs2_inline_data i_data; |
ccd979bd MF |
677 | __u8 i_symlink[0]; |
678 | } id2; | |
679 | /* Actual on-disk size is one block */ | |
680 | }; | |
681 | ||
682 | /* | |
683 | * On-disk directory entry structure for OCFS2 | |
684 | * | |
685 | * Packed as this structure could be accessed unaligned on 64-bit platforms | |
686 | */ | |
687 | struct ocfs2_dir_entry { | |
688 | /*00*/ __le64 inode; /* Inode number */ | |
689 | __le16 rec_len; /* Directory entry length */ | |
690 | __u8 name_len; /* Name length */ | |
691 | __u8 file_type; | |
692 | /*0C*/ char name[OCFS2_MAX_FILENAME_LEN]; /* File name */ | |
693 | /* Actual on-disk length specified by rec_len */ | |
694 | } __attribute__ ((packed)); | |
695 | ||
696 | /* | |
697 | * On disk allocator group structure for OCFS2 | |
698 | */ | |
699 | struct ocfs2_group_desc | |
700 | { | |
701 | /*00*/ __u8 bg_signature[8]; /* Signature for validation */ | |
702 | __le16 bg_size; /* Size of included bitmap in | |
703 | bytes. */ | |
704 | __le16 bg_bits; /* Bits represented by this | |
705 | group. */ | |
706 | __le16 bg_free_bits_count; /* Free bits count */ | |
707 | __le16 bg_chain; /* What chain I am in. */ | |
708 | /*10*/ __le32 bg_generation; | |
709 | __le32 bg_reserved1; | |
710 | __le64 bg_next_group; /* Next group in my list, in | |
711 | blocks */ | |
712 | /*20*/ __le64 bg_parent_dinode; /* dinode which owns me, in | |
713 | blocks */ | |
714 | __le64 bg_blkno; /* Offset on disk, in blocks */ | |
715 | /*30*/ __le64 bg_reserved2[2]; | |
716 | /*40*/ __u8 bg_bitmap[0]; | |
717 | }; | |
718 | ||
5a7bc8eb TM |
719 | /* |
720 | * On disk extended attribute structure for OCFS2. | |
721 | */ | |
722 | ||
723 | /* | |
724 | * ocfs2_xattr_entry indicates one extend attribute. | |
725 | * | |
726 | * Note that it can be stored in inode, one block or one xattr bucket. | |
727 | */ | |
728 | struct ocfs2_xattr_entry { | |
729 | __le32 xe_name_hash; /* hash value of xattr prefix+suffix. */ | |
730 | __le16 xe_name_offset; /* byte offset from the 1st etnry in the local | |
731 | local xattr storage(inode, xattr block or | |
732 | xattr bucket). */ | |
733 | __u8 xe_name_len; /* xattr name len, does't include prefix. */ | |
734 | __u8 xe_type; /* the low 7 bits indicates the name prefix's | |
735 | * type and the highest 1 bits indicate whether | |
736 | * the EA is stored in the local storage. */ | |
737 | __le64 xe_value_size; /* real xattr value length. */ | |
738 | }; | |
739 | ||
740 | /* | |
741 | * On disk structure for xattr header. | |
742 | * | |
743 | * One ocfs2_xattr_header describes how many ocfs2_xattr_entry records in | |
744 | * the local xattr storage. | |
745 | */ | |
746 | struct ocfs2_xattr_header { | |
747 | __le16 xh_count; /* contains the count of how | |
748 | many records are in the | |
749 | local xattr storage. */ | |
750 | __le16 xh_reserved1; | |
751 | __le32 xh_reserved2; | |
752 | __le64 xh_csum; | |
753 | struct ocfs2_xattr_entry xh_entries[0]; /* xattr entry list. */ | |
754 | }; | |
755 | ||
756 | /* | |
757 | * On disk structure for xattr value root. | |
758 | * | |
759 | * It is used when one extended attribute's size is larger, and we will save it | |
760 | * in an outside cluster. It will stored in a b-tree like file content. | |
761 | */ | |
762 | struct ocfs2_xattr_value_root { | |
763 | /*00*/ __le32 xr_clusters; /* clusters covered by xattr value. */ | |
764 | __le32 xr_reserved0; | |
765 | __le64 xr_last_eb_blk; /* Pointer to last extent block */ | |
766 | /*10*/ struct ocfs2_extent_list xr_list; /* Extent record list */ | |
767 | }; | |
768 | ||
769 | /* | |
770 | * On disk structure for xattr tree root. | |
771 | * | |
772 | * It is used when there are too many extended attributes for one file. These | |
773 | * attributes will be organized and stored in an indexed-btree. | |
774 | */ | |
775 | struct ocfs2_xattr_tree_root { | |
776 | /*00*/ __le32 xt_clusters; /* clusters covered by xattr. */ | |
777 | __le32 xt_reserved0; | |
778 | __le64 xt_last_eb_blk; /* Pointer to last extent block */ | |
779 | /*10*/ struct ocfs2_extent_list xt_list; /* Extent record list */ | |
780 | }; | |
781 | ||
782 | #define OCFS2_XATTR_INDEXED 0x1 | |
783 | ||
784 | /* | |
785 | * On disk structure for xattr block. | |
786 | */ | |
787 | struct ocfs2_xattr_block { | |
788 | /*00*/ __u8 xb_signature[8]; /* Signature for verification */ | |
789 | __le16 xb_suballoc_slot; /* Slot suballocator this | |
790 | block belongs to. */ | |
791 | __le16 xb_suballoc_bit; /* Bit offset in suballocator | |
792 | block group */ | |
793 | __le32 xb_fs_generation; /* Must match super block */ | |
794 | /*10*/ __le64 xb_blkno; /* Offset on disk, in blocks */ | |
795 | __le64 xb_csum; | |
796 | /*20*/ __le16 xb_flags; /* Indicates whether this block contains | |
797 | real xattr or a xattr tree. */ | |
798 | __le16 xb_reserved0; | |
799 | __le32 xb_reserved1; | |
800 | __le64 xb_reserved2; | |
801 | /*30*/ union { | |
802 | struct ocfs2_xattr_header xb_header; /* xattr header if this | |
803 | block contains xattr */ | |
804 | struct ocfs2_xattr_tree_root xb_root;/* xattr tree root if this | |
805 | block cotains xattr | |
806 | tree. */ | |
807 | } xb_attrs; | |
808 | }; | |
809 | ||
810 | #define OCFS2_XATTR_ENTRY_LOCAL 0x80 | |
811 | #define OCFS2_XATTR_TYPE_MASK 0x7F | |
812 | static inline void ocfs2_xattr_set_local(struct ocfs2_xattr_entry *xe, | |
813 | int local) | |
814 | { | |
815 | if (local) | |
816 | xe->xe_type |= OCFS2_XATTR_ENTRY_LOCAL; | |
817 | else | |
818 | xe->xe_type &= ~OCFS2_XATTR_ENTRY_LOCAL; | |
819 | } | |
820 | ||
821 | static inline int ocfs2_xattr_is_local(struct ocfs2_xattr_entry *xe) | |
822 | { | |
823 | return xe->xe_type & OCFS2_XATTR_ENTRY_LOCAL; | |
824 | } | |
825 | ||
826 | static inline void ocfs2_xattr_set_type(struct ocfs2_xattr_entry *xe, int type) | |
827 | { | |
828 | xe->xe_type |= type & OCFS2_XATTR_TYPE_MASK; | |
829 | } | |
830 | ||
831 | static inline int ocfs2_xattr_get_type(struct ocfs2_xattr_entry *xe) | |
832 | { | |
833 | return xe->xe_type & OCFS2_XATTR_TYPE_MASK; | |
834 | } | |
835 | ||
ccd979bd MF |
836 | #ifdef __KERNEL__ |
837 | static inline int ocfs2_fast_symlink_chars(struct super_block *sb) | |
838 | { | |
839 | return sb->s_blocksize - | |
840 | offsetof(struct ocfs2_dinode, id2.i_symlink); | |
841 | } | |
842 | ||
15b1e36b MF |
843 | static inline int ocfs2_max_inline_data(struct super_block *sb) |
844 | { | |
845 | return sb->s_blocksize - | |
846 | offsetof(struct ocfs2_dinode, id2.i_data.id_data); | |
847 | } | |
848 | ||
ccd979bd MF |
849 | static inline int ocfs2_extent_recs_per_inode(struct super_block *sb) |
850 | { | |
851 | int size; | |
852 | ||
853 | size = sb->s_blocksize - | |
854 | offsetof(struct ocfs2_dinode, id2.i_list.l_recs); | |
855 | ||
856 | return size / sizeof(struct ocfs2_extent_rec); | |
857 | } | |
858 | ||
859 | static inline int ocfs2_chain_recs_per_inode(struct super_block *sb) | |
860 | { | |
861 | int size; | |
862 | ||
863 | size = sb->s_blocksize - | |
864 | offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs); | |
865 | ||
866 | return size / sizeof(struct ocfs2_chain_rec); | |
867 | } | |
868 | ||
869 | static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb) | |
870 | { | |
871 | int size; | |
872 | ||
873 | size = sb->s_blocksize - | |
874 | offsetof(struct ocfs2_extent_block, h_list.l_recs); | |
875 | ||
876 | return size / sizeof(struct ocfs2_extent_rec); | |
877 | } | |
878 | ||
879 | static inline u16 ocfs2_local_alloc_size(struct super_block *sb) | |
880 | { | |
881 | u16 size; | |
882 | ||
883 | size = sb->s_blocksize - | |
884 | offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap); | |
885 | ||
886 | return size; | |
887 | } | |
888 | ||
889 | static inline int ocfs2_group_bitmap_size(struct super_block *sb) | |
890 | { | |
891 | int size; | |
892 | ||
893 | size = sb->s_blocksize - | |
894 | offsetof(struct ocfs2_group_desc, bg_bitmap); | |
895 | ||
896 | return size; | |
897 | } | |
898 | ||
899 | static inline int ocfs2_truncate_recs_per_inode(struct super_block *sb) | |
900 | { | |
901 | int size; | |
902 | ||
903 | size = sb->s_blocksize - | |
904 | offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs); | |
905 | ||
906 | return size / sizeof(struct ocfs2_truncate_rec); | |
907 | } | |
50af94b1 MF |
908 | |
909 | static inline u64 ocfs2_backup_super_blkno(struct super_block *sb, int index) | |
910 | { | |
911 | u64 offset = OCFS2_BACKUP_SB_START; | |
912 | ||
913 | if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) { | |
914 | offset <<= (2 * index); | |
a8a75a20 | 915 | offset >>= sb->s_blocksize_bits; |
50af94b1 MF |
916 | return offset; |
917 | } | |
918 | ||
919 | return 0; | |
920 | ||
921 | } | |
ccd979bd MF |
922 | #else |
923 | static inline int ocfs2_fast_symlink_chars(int blocksize) | |
924 | { | |
925 | return blocksize - offsetof(struct ocfs2_dinode, id2.i_symlink); | |
926 | } | |
927 | ||
15b1e36b MF |
928 | static inline int ocfs2_max_inline_data(int blocksize) |
929 | { | |
930 | return blocksize - offsetof(struct ocfs2_dinode, id2.i_data.id_data); | |
931 | } | |
932 | ||
ccd979bd MF |
933 | static inline int ocfs2_extent_recs_per_inode(int blocksize) |
934 | { | |
935 | int size; | |
936 | ||
937 | size = blocksize - | |
938 | offsetof(struct ocfs2_dinode, id2.i_list.l_recs); | |
939 | ||
940 | return size / sizeof(struct ocfs2_extent_rec); | |
941 | } | |
942 | ||
943 | static inline int ocfs2_chain_recs_per_inode(int blocksize) | |
944 | { | |
945 | int size; | |
946 | ||
947 | size = blocksize - | |
948 | offsetof(struct ocfs2_dinode, id2.i_chain.cl_recs); | |
949 | ||
950 | return size / sizeof(struct ocfs2_chain_rec); | |
951 | } | |
952 | ||
953 | static inline int ocfs2_extent_recs_per_eb(int blocksize) | |
954 | { | |
955 | int size; | |
956 | ||
957 | size = blocksize - | |
958 | offsetof(struct ocfs2_extent_block, h_list.l_recs); | |
959 | ||
960 | return size / sizeof(struct ocfs2_extent_rec); | |
961 | } | |
962 | ||
963 | static inline int ocfs2_local_alloc_size(int blocksize) | |
964 | { | |
965 | int size; | |
966 | ||
967 | size = blocksize - | |
968 | offsetof(struct ocfs2_dinode, id2.i_lab.la_bitmap); | |
969 | ||
970 | return size; | |
971 | } | |
972 | ||
973 | static inline int ocfs2_group_bitmap_size(int blocksize) | |
974 | { | |
975 | int size; | |
976 | ||
977 | size = blocksize - | |
978 | offsetof(struct ocfs2_group_desc, bg_bitmap); | |
979 | ||
980 | return size; | |
981 | } | |
982 | ||
983 | static inline int ocfs2_truncate_recs_per_inode(int blocksize) | |
984 | { | |
985 | int size; | |
986 | ||
987 | size = blocksize - | |
988 | offsetof(struct ocfs2_dinode, id2.i_dealloc.tl_recs); | |
989 | ||
990 | return size / sizeof(struct ocfs2_truncate_rec); | |
991 | } | |
50af94b1 MF |
992 | |
993 | static inline uint64_t ocfs2_backup_super_blkno(int blocksize, int index) | |
994 | { | |
995 | uint64_t offset = OCFS2_BACKUP_SB_START; | |
996 | ||
997 | if (index >= 0 && index < OCFS2_MAX_BACKUP_SUPERBLOCKS) { | |
998 | offset <<= (2 * index); | |
999 | offset /= blocksize; | |
1000 | return offset; | |
1001 | } | |
1002 | ||
1003 | return 0; | |
1004 | } | |
ccd979bd MF |
1005 | #endif /* __KERNEL__ */ |
1006 | ||
1007 | ||
1008 | static inline int ocfs2_system_inode_is_global(int type) | |
1009 | { | |
1010 | return ((type >= 0) && | |
1011 | (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE)); | |
1012 | } | |
1013 | ||
1014 | static inline int ocfs2_sprintf_system_inode_name(char *buf, int len, | |
1015 | int type, int slot) | |
1016 | { | |
1017 | int chars; | |
1018 | ||
1019 | /* | |
1020 | * Global system inodes can only have one copy. Everything | |
1021 | * after OCFS2_LAST_GLOBAL_SYSTEM_INODE in the system inode | |
1022 | * list has a copy per slot. | |
1023 | */ | |
1024 | if (type <= OCFS2_LAST_GLOBAL_SYSTEM_INODE) | |
fe9f3877 | 1025 | chars = snprintf(buf, len, "%s", |
ccd979bd MF |
1026 | ocfs2_system_inodes[type].si_name); |
1027 | else | |
1028 | chars = snprintf(buf, len, | |
1029 | ocfs2_system_inodes[type].si_name, | |
1030 | slot); | |
1031 | ||
1032 | return chars; | |
1033 | } | |
1034 | ||
1035 | static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de, | |
1036 | umode_t mode) | |
1037 | { | |
1038 | de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT]; | |
1039 | } | |
1040 | ||
1041 | #endif /* _OCFS2_FS_H */ | |
1042 |