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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
3 | * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved. | |
4 | * | |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
7 | * of the GNU General Public License v.2. | |
8 | */ | |
9 | ||
10 | #ifndef __GFS2_ONDISK_DOT_H__ | |
11 | #define __GFS2_ONDISK_DOT_H__ | |
12 | ||
13 | #define GFS2_MAGIC 0x01161970 | |
14 | #define GFS2_BASIC_BLOCK 512 | |
15 | #define GFS2_BASIC_BLOCK_SHIFT 9 | |
16 | ||
17 | /* Lock numbers of the LM_TYPE_NONDISK type */ | |
18 | ||
19 | #define GFS2_MOUNT_LOCK 0 | |
20 | #define GFS2_LIVE_LOCK 1 | |
21 | #define GFS2_TRANS_LOCK 2 | |
22 | #define GFS2_RENAME_LOCK 3 | |
23 | ||
24 | /* Format numbers for various metadata types */ | |
25 | ||
26 | #define GFS2_FORMAT_NONE 0 | |
27 | #define GFS2_FORMAT_SB 100 | |
28 | #define GFS2_FORMAT_RG 200 | |
29 | #define GFS2_FORMAT_RB 300 | |
30 | #define GFS2_FORMAT_DI 400 | |
31 | #define GFS2_FORMAT_IN 500 | |
32 | #define GFS2_FORMAT_LF 600 | |
33 | #define GFS2_FORMAT_JD 700 | |
34 | #define GFS2_FORMAT_LH 800 | |
35 | #define GFS2_FORMAT_LD 900 | |
36 | #define GFS2_FORMAT_LB 1000 | |
37 | #define GFS2_FORMAT_EA 1100 | |
38 | #define GFS2_FORMAT_ED 1200 | |
39 | #define GFS2_FORMAT_UT 1300 | |
40 | #define GFS2_FORMAT_QC 1400 | |
41 | /* These are format numbers for entities contained in files */ | |
42 | #define GFS2_FORMAT_RI 1500 | |
43 | #define GFS2_FORMAT_DE 1600 | |
44 | #define GFS2_FORMAT_QU 1700 | |
45 | /* These are part of the superblock */ | |
46 | #define GFS2_FORMAT_FS 1801 | |
47 | #define GFS2_FORMAT_MULTI 1900 | |
48 | ||
49 | /* | |
50 | * An on-disk inode number | |
51 | */ | |
52 | ||
53 | #define gfs2_inum_equal(ino1, ino2) \ | |
54 | (((ino1)->no_formal_ino == (ino2)->no_formal_ino) && \ | |
55 | ((ino1)->no_addr == (ino2)->no_addr)) | |
56 | ||
57 | struct gfs2_inum { | |
58 | __be64 no_formal_ino; | |
59 | __be64 no_addr; | |
60 | }; | |
61 | ||
62 | /* | |
63 | * Generic metadata head structure | |
64 | * Every inplace buffer logged in the journal must start with this. | |
65 | */ | |
66 | ||
67 | #define GFS2_METATYPE_NONE 0 | |
68 | #define GFS2_METATYPE_SB 1 | |
69 | #define GFS2_METATYPE_RG 2 | |
70 | #define GFS2_METATYPE_RB 3 | |
71 | #define GFS2_METATYPE_DI 4 | |
72 | #define GFS2_METATYPE_IN 5 | |
73 | #define GFS2_METATYPE_LF 6 | |
74 | #define GFS2_METATYPE_JD 7 | |
75 | #define GFS2_METATYPE_LH 8 | |
76 | #define GFS2_METATYPE_LD 9 | |
77 | #define GFS2_METATYPE_LB 10 | |
78 | #define GFS2_METATYPE_EA 11 | |
79 | #define GFS2_METATYPE_ED 12 | |
80 | #define GFS2_METATYPE_UT 13 | |
81 | #define GFS2_METATYPE_QC 14 | |
82 | ||
83 | struct gfs2_meta_header { | |
84 | __be32 mh_magic; | |
85 | __be32 mh_type; | |
86 | __be64 __pad0; /* Was generation number in gfs1 */ | |
87 | __be32 mh_format; | |
88 | __be32 __pad1; /* Was incarnation number in gfs1 */ | |
89 | }; | |
90 | ||
91 | /* | |
92 | * super-block structure | |
93 | * | |
94 | * It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes) | |
95 | * | |
96 | * Order is important, need to be able to read old superblocks to do on-disk | |
97 | * version upgrades. | |
98 | */ | |
99 | ||
100 | /* Address of superblock in GFS2 basic blocks */ | |
101 | #define GFS2_SB_ADDR 128 | |
102 | ||
103 | /* The lock number for the superblock (must be zero) */ | |
104 | #define GFS2_SB_LOCK 0 | |
105 | ||
106 | /* Requirement: GFS2_LOCKNAME_LEN % 8 == 0 | |
107 | Includes: the fencing zero at the end */ | |
108 | #define GFS2_LOCKNAME_LEN 64 | |
109 | ||
110 | struct gfs2_sb { | |
111 | struct gfs2_meta_header sb_header; | |
112 | ||
113 | __be32 sb_fs_format; | |
114 | __be32 sb_multihost_format; | |
115 | __u32 __pad0; /* Was superblock flags in gfs1 */ | |
116 | ||
117 | __be32 sb_bsize; | |
118 | __be32 sb_bsize_shift; | |
119 | __u32 __pad1; /* Was journal segment size in gfs1 */ | |
120 | ||
121 | struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */ | |
122 | struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */ | |
123 | struct gfs2_inum sb_root_dir; | |
124 | ||
125 | char sb_lockproto[GFS2_LOCKNAME_LEN]; | |
126 | char sb_locktable[GFS2_LOCKNAME_LEN]; | |
127 | /* In gfs1, quota and license dinodes followed */ | |
128 | }; | |
129 | ||
130 | /* | |
131 | * resource index structure | |
132 | */ | |
133 | ||
134 | struct gfs2_rindex { | |
135 | __be64 ri_addr; /* grp block disk address */ | |
136 | __be32 ri_length; /* length of rgrp header in fs blocks */ | |
137 | __u32 __pad; | |
138 | ||
139 | __be64 ri_data0; /* first data location */ | |
140 | __be32 ri_data; /* num of data blocks in rgrp */ | |
141 | ||
142 | __be32 ri_bitbytes; /* number of bytes in data bitmaps */ | |
143 | ||
144 | __u8 ri_reserved[64]; | |
145 | }; | |
146 | ||
147 | /* | |
148 | * resource group header structure | |
149 | */ | |
150 | ||
151 | /* Number of blocks per byte in rgrp */ | |
152 | #define GFS2_NBBY 4 | |
153 | #define GFS2_BIT_SIZE 2 | |
154 | #define GFS2_BIT_MASK 0x00000003 | |
155 | ||
156 | #define GFS2_BLKST_FREE 0 | |
157 | #define GFS2_BLKST_USED 1 | |
158 | #define GFS2_BLKST_INVALID 2 | |
159 | #define GFS2_BLKST_DINODE 3 | |
160 | ||
161 | #define GFS2_RGF_JOURNAL 0x00000001 | |
162 | #define GFS2_RGF_METAONLY 0x00000002 | |
163 | #define GFS2_RGF_DATAONLY 0x00000004 | |
164 | #define GFS2_RGF_NOALLOC 0x00000008 | |
165 | ||
166 | struct gfs2_rgrp { | |
167 | struct gfs2_meta_header rg_header; | |
168 | ||
169 | __be32 rg_flags; | |
170 | __be32 rg_free; | |
171 | __be32 rg_dinodes; | |
172 | ||
173 | __u8 rg_reserved[92]; /* Several fields from gfs1 now reserved */ | |
174 | }; | |
175 | ||
176 | /* | |
177 | * quota structure | |
178 | */ | |
179 | ||
180 | struct gfs2_quota { | |
181 | __be64 qu_limit; | |
182 | __be64 qu_warn; | |
183 | __be64 qu_value; | |
184 | }; | |
185 | ||
186 | /* | |
187 | * dinode structure | |
188 | */ | |
189 | ||
190 | #define GFS2_MAX_META_HEIGHT 10 | |
191 | #define GFS2_DIR_MAX_DEPTH 17 | |
192 | ||
193 | #define DT2IF(dt) (((dt) << 12) & S_IFMT) | |
194 | #define IF2DT(sif) (((sif) & S_IFMT) >> 12) | |
195 | ||
196 | /* Dinode flags */ | |
197 | #define GFS2_DIF_JDATA 0x00000001 | |
198 | #define GFS2_DIF_EXHASH 0x00000002 | |
199 | #define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */ | |
200 | #define GFS2_DIF_EA_INDIRECT 0x00000008 | |
201 | #define GFS2_DIF_DIRECTIO 0x00000010 | |
202 | #define GFS2_DIF_IMMUTABLE 0x00000020 | |
203 | #define GFS2_DIF_APPENDONLY 0x00000040 | |
204 | #define GFS2_DIF_NOATIME 0x00000080 | |
205 | #define GFS2_DIF_SYNC 0x00000100 | |
206 | #define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */ | |
207 | #define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */ | |
208 | #define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 | |
209 | #define GFS2_DIF_INHERIT_JDATA 0x80000000 | |
210 | ||
211 | struct gfs2_dinode { | |
212 | struct gfs2_meta_header di_header; | |
213 | ||
214 | struct gfs2_inum di_num; | |
215 | ||
216 | __be32 di_mode; /* mode of file */ | |
217 | __be32 di_uid; /* owner's user id */ | |
218 | __be32 di_gid; /* owner's group id */ | |
219 | __be32 di_nlink; /* number of links to this file */ | |
220 | __be64 di_size; /* number of bytes in file */ | |
221 | __be64 di_blocks; /* number of blocks in file */ | |
222 | __be64 di_atime; /* time last accessed */ | |
223 | __be64 di_mtime; /* time last modified */ | |
224 | __be64 di_ctime; /* time last changed */ | |
225 | __be32 di_major; /* device major number */ | |
226 | __be32 di_minor; /* device minor number */ | |
227 | ||
228 | /* This section varies from gfs1. Padding added to align with | |
229 | * remainder of dinode | |
230 | */ | |
231 | __be64 di_goal_meta; /* rgrp to alloc from next */ | |
232 | __be64 di_goal_data; /* data block goal */ | |
233 | __u32 __pad[2]; | |
234 | ||
235 | __be32 di_flags; /* GFS2_DIF_... */ | |
236 | __be32 di_payload_format; /* GFS2_FORMAT_... */ | |
237 | __u16 __pad1; /* Was ditype in gfs1 */ | |
238 | __be16 di_height; /* height of metadata */ | |
239 | __u32 __pad2; /* Unused incarnation number from gfs1 */ | |
240 | ||
241 | /* These only apply to directories */ | |
242 | __u16 __pad3; /* Padding */ | |
243 | __be16 di_depth; /* Number of bits in the table */ | |
244 | __be32 di_entries; /* The number of entries in the directory */ | |
245 | ||
246 | struct gfs2_inum __pad4; /* Unused even in current gfs1 */ | |
247 | ||
248 | __be64 di_eattr; /* extended attribute block number */ | |
249 | ||
250 | __u8 di_reserved[56]; | |
251 | }; | |
252 | ||
253 | /* | |
254 | * directory structure - many of these per directory file | |
255 | */ | |
256 | ||
257 | #define GFS2_FNAMESIZE 255 | |
258 | #define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7) | |
259 | ||
260 | struct gfs2_dirent { | |
261 | struct gfs2_inum de_inum; | |
262 | __be32 de_hash; | |
263 | __be32 de_rec_len; | |
264 | __u8 de_name_len; | |
265 | __u8 de_type; | |
266 | __u16 __pad1; | |
267 | __u32 __pad2; | |
268 | }; | |
269 | ||
270 | /* | |
271 | * Header of leaf directory nodes | |
272 | */ | |
273 | ||
274 | struct gfs2_leaf { | |
275 | struct gfs2_meta_header lf_header; | |
276 | ||
277 | __be16 lf_depth; /* Depth of leaf */ | |
278 | __be16 lf_entries; /* Number of dirents in leaf */ | |
279 | __be32 lf_dirent_format; /* Format of the dirents */ | |
280 | __be64 lf_next; /* Next leaf, if overflow */ | |
281 | ||
282 | __u8 lf_reserved[32]; | |
283 | }; | |
284 | ||
285 | /* | |
286 | * Extended attribute header format | |
287 | */ | |
288 | ||
289 | #define GFS2_EA_MAX_NAME_LEN 255 | |
290 | #define GFS2_EA_MAX_DATA_LEN 65536 | |
291 | ||
292 | #define GFS2_EATYPE_UNUSED 0 | |
293 | #define GFS2_EATYPE_USR 1 | |
294 | #define GFS2_EATYPE_SYS 2 | |
295 | ||
296 | #define GFS2_EATYPE_LAST 2 | |
297 | #define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST) | |
298 | ||
299 | #define GFS2_EAFLAG_LAST 0x01 /* last ea in block */ | |
300 | ||
301 | struct gfs2_ea_header { | |
302 | __be32 ea_rec_len; | |
303 | __be32 ea_data_len; | |
304 | __u8 ea_name_len; /* no NULL pointer after the string */ | |
305 | __u8 ea_type; /* GFS2_EATYPE_... */ | |
306 | __u8 ea_flags; /* GFS2_EAFLAG_... */ | |
307 | __u8 ea_num_ptrs; | |
308 | __u32 __pad; | |
309 | }; | |
310 | ||
311 | /* | |
312 | * Log header structure | |
313 | */ | |
314 | ||
315 | #define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */ | |
316 | ||
317 | struct gfs2_log_header { | |
318 | struct gfs2_meta_header lh_header; | |
319 | ||
320 | __be64 lh_sequence; /* Sequence number of this transaction */ | |
321 | __be32 lh_flags; /* GFS2_LOG_HEAD_... */ | |
322 | __be32 lh_tail; /* Block number of log tail */ | |
323 | __be32 lh_blkno; | |
324 | __be32 lh_hash; | |
325 | }; | |
326 | ||
327 | /* | |
328 | * Log type descriptor | |
329 | */ | |
330 | ||
331 | #define GFS2_LOG_DESC_METADATA 300 | |
332 | /* ld_data1 is the number of metadata blocks in the descriptor. | |
333 | ld_data2 is unused. */ | |
334 | ||
335 | #define GFS2_LOG_DESC_REVOKE 301 | |
336 | /* ld_data1 is the number of revoke blocks in the descriptor. | |
337 | ld_data2 is unused. */ | |
338 | ||
18ec7d5c SW |
339 | #define GFS2_LOG_DESC_JDATA 302 |
340 | /* ld_data1 is the number of data blocks in the descriptor. | |
341 | ld_data2 is unused. */ | |
342 | ||
b3b94faa DT |
343 | struct gfs2_log_descriptor { |
344 | struct gfs2_meta_header ld_header; | |
345 | ||
346 | __be32 ld_type; /* GFS2_LOG_DESC_... */ | |
347 | __be32 ld_length; /* Number of buffers in this chunk */ | |
348 | __be32 ld_data1; /* descriptor-specific field */ | |
349 | __be32 ld_data2; /* descriptor-specific field */ | |
350 | ||
351 | __u8 ld_reserved[32]; | |
352 | }; | |
353 | ||
354 | /* | |
355 | * Inum Range | |
356 | * Describe a range of formal inode numbers allocated to | |
357 | * one machine to assign to inodes. | |
358 | */ | |
359 | ||
360 | #define GFS2_INUM_QUANTUM 1048576 | |
361 | ||
362 | struct gfs2_inum_range { | |
363 | __be64 ir_start; | |
364 | __be64 ir_length; | |
365 | }; | |
366 | ||
367 | /* | |
368 | * Statfs change | |
369 | * Describes an change to the pool of free and allocated | |
370 | * blocks. | |
371 | */ | |
372 | ||
373 | struct gfs2_statfs_change { | |
374 | __be64 sc_total; | |
375 | __be64 sc_free; | |
376 | __be64 sc_dinodes; | |
377 | }; | |
378 | ||
379 | /* | |
380 | * Unlinked Tag | |
381 | * Describes an allocated inode that isn't linked into | |
382 | * the directory tree and might need to be deallocated. | |
383 | */ | |
384 | ||
385 | #define GFS2_UTF_UNINIT 0x00000001 | |
386 | ||
387 | struct gfs2_unlinked_tag { | |
388 | struct gfs2_inum ut_inum; | |
389 | __be32 ut_flags; /* GFS2_UTF_... */ | |
390 | __u32 __pad; | |
391 | }; | |
392 | ||
393 | /* | |
394 | * Quota change | |
395 | * Describes an allocation change for a particular | |
396 | * user or group. | |
397 | */ | |
398 | ||
399 | #define GFS2_QCF_USER 0x00000001 | |
400 | ||
401 | struct gfs2_quota_change { | |
402 | __be64 qc_change; | |
403 | __be32 qc_flags; /* GFS2_QCF_... */ | |
404 | __be32 qc_id; | |
405 | }; | |
406 | ||
18ec7d5c | 407 | #ifdef __KERNEL__ |
b3b94faa DT |
408 | /* Translation functions */ |
409 | ||
410 | extern void gfs2_inum_in(struct gfs2_inum *no, char *buf); | |
411 | extern void gfs2_inum_out(struct gfs2_inum *no, char *buf); | |
b3b94faa | 412 | extern void gfs2_sb_in(struct gfs2_sb *sb, char *buf); |
b3b94faa DT |
413 | extern void gfs2_rindex_in(struct gfs2_rindex *ri, char *buf); |
414 | extern void gfs2_rindex_out(struct gfs2_rindex *ri, char *buf); | |
415 | extern void gfs2_rgrp_in(struct gfs2_rgrp *rg, char *buf); | |
416 | extern void gfs2_rgrp_out(struct gfs2_rgrp *rg, char *buf); | |
417 | extern void gfs2_quota_in(struct gfs2_quota *qu, char *buf); | |
418 | extern void gfs2_quota_out(struct gfs2_quota *qu, char *buf); | |
419 | extern void gfs2_dinode_in(struct gfs2_dinode *di, char *buf); | |
420 | extern void gfs2_dinode_out(struct gfs2_dinode *di, char *buf); | |
b3b94faa | 421 | extern void gfs2_leaf_in(struct gfs2_leaf *lf, char *buf); |
b3b94faa DT |
422 | extern void gfs2_ea_header_in(struct gfs2_ea_header *ea, char *buf); |
423 | extern void gfs2_ea_header_out(struct gfs2_ea_header *ea, char *buf); | |
424 | extern void gfs2_log_header_in(struct gfs2_log_header *lh, char *buf); | |
425 | extern void gfs2_inum_range_in(struct gfs2_inum_range *ir, char *buf); | |
426 | extern void gfs2_inum_range_out(struct gfs2_inum_range *ir, char *buf); | |
427 | extern void gfs2_statfs_change_in(struct gfs2_statfs_change *sc, char *buf); | |
428 | extern void gfs2_statfs_change_out(struct gfs2_statfs_change *sc, char *buf); | |
429 | extern void gfs2_unlinked_tag_in(struct gfs2_unlinked_tag *ut, char *buf); | |
430 | extern void gfs2_unlinked_tag_out(struct gfs2_unlinked_tag *ut, char *buf); | |
431 | extern void gfs2_quota_change_in(struct gfs2_quota_change *qc, char *buf); | |
b3b94faa DT |
432 | |
433 | /* Printing functions */ | |
434 | ||
435 | extern void gfs2_inum_print(struct gfs2_inum *no); | |
436 | extern void gfs2_meta_header_print(struct gfs2_meta_header *mh); | |
437 | extern void gfs2_sb_print(struct gfs2_sb *sb); | |
438 | extern void gfs2_rindex_print(struct gfs2_rindex *ri); | |
439 | extern void gfs2_rgrp_print(struct gfs2_rgrp *rg); | |
440 | extern void gfs2_quota_print(struct gfs2_quota *qu); | |
441 | extern void gfs2_dinode_print(struct gfs2_dinode *di); | |
442 | extern void gfs2_dirent_print(struct gfs2_dirent *de, char *name); | |
443 | extern void gfs2_leaf_print(struct gfs2_leaf *lf); | |
444 | extern void gfs2_ea_header_print(struct gfs2_ea_header *ea, char *name); | |
445 | extern void gfs2_log_header_print(struct gfs2_log_header *lh); | |
446 | extern void gfs2_log_descriptor_print(struct gfs2_log_descriptor *ld); | |
447 | extern void gfs2_inum_range_print(struct gfs2_inum_range *ir); | |
448 | extern void gfs2_statfs_change_print(struct gfs2_statfs_change *sc); | |
449 | extern void gfs2_unlinked_tag_print(struct gfs2_unlinked_tag *ut); | |
450 | extern void gfs2_quota_change_print(struct gfs2_quota_change *qc); | |
451 | ||
18ec7d5c SW |
452 | #endif /* __KERNEL__ */ |
453 | ||
b3b94faa | 454 | #endif /* __GFS2_ONDISK_DOT_H__ */ |