Commit | Line | Data |
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b3b94faa | 1 | /* |
feaa7bba SW |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
3 | * Copyright (C) 2004-2006 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 | */ | |
b3b94faa DT |
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 | |
fc69d0d3 SW |
37 | #define GFS2_FORMAT_EA 1600 |
38 | #define GFS2_FORMAT_ED 1700 | |
b3b94faa DT |
39 | #define GFS2_FORMAT_QC 1400 |
40 | /* These are format numbers for entities contained in files */ | |
fc69d0d3 SW |
41 | #define GFS2_FORMAT_RI 1100 |
42 | #define GFS2_FORMAT_DE 1200 | |
43 | #define GFS2_FORMAT_QU 1500 | |
b3b94faa DT |
44 | /* These are part of the superblock */ |
45 | #define GFS2_FORMAT_FS 1801 | |
46 | #define GFS2_FORMAT_MULTI 1900 | |
47 | ||
48 | /* | |
49 | * An on-disk inode number | |
50 | */ | |
51 | ||
b3b94faa DT |
52 | struct gfs2_inum { |
53 | __be64 no_formal_ino; | |
54 | __be64 no_addr; | |
55 | }; | |
56 | ||
5c676f6d SW |
57 | static inline int gfs2_inum_equal(const struct gfs2_inum *ino1, |
58 | const struct gfs2_inum *ino2) | |
59 | { | |
60 | return ino1->no_formal_ino == ino2->no_formal_ino && | |
61 | ino1->no_addr == ino2->no_addr; | |
62 | } | |
63 | ||
b3b94faa DT |
64 | /* |
65 | * Generic metadata head structure | |
66 | * Every inplace buffer logged in the journal must start with this. | |
67 | */ | |
68 | ||
69 | #define GFS2_METATYPE_NONE 0 | |
70 | #define GFS2_METATYPE_SB 1 | |
71 | #define GFS2_METATYPE_RG 2 | |
72 | #define GFS2_METATYPE_RB 3 | |
73 | #define GFS2_METATYPE_DI 4 | |
74 | #define GFS2_METATYPE_IN 5 | |
75 | #define GFS2_METATYPE_LF 6 | |
76 | #define GFS2_METATYPE_JD 7 | |
77 | #define GFS2_METATYPE_LH 8 | |
78 | #define GFS2_METATYPE_LD 9 | |
fc69d0d3 SW |
79 | #define GFS2_METATYPE_LB 12 |
80 | #define GFS2_METATYPE_EA 10 | |
81 | #define GFS2_METATYPE_ED 11 | |
b3b94faa DT |
82 | #define GFS2_METATYPE_QC 14 |
83 | ||
84 | struct gfs2_meta_header { | |
85 | __be32 mh_magic; | |
86 | __be32 mh_type; | |
87 | __be64 __pad0; /* Was generation number in gfs1 */ | |
88 | __be32 mh_format; | |
89 | __be32 __pad1; /* Was incarnation number in gfs1 */ | |
90 | }; | |
91 | ||
92 | /* | |
93 | * super-block structure | |
94 | * | |
95 | * It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes) | |
96 | * | |
97 | * Order is important, need to be able to read old superblocks to do on-disk | |
98 | * version upgrades. | |
99 | */ | |
100 | ||
101 | /* Address of superblock in GFS2 basic blocks */ | |
102 | #define GFS2_SB_ADDR 128 | |
103 | ||
104 | /* The lock number for the superblock (must be zero) */ | |
105 | #define GFS2_SB_LOCK 0 | |
106 | ||
107 | /* Requirement: GFS2_LOCKNAME_LEN % 8 == 0 | |
108 | Includes: the fencing zero at the end */ | |
109 | #define GFS2_LOCKNAME_LEN 64 | |
110 | ||
111 | struct gfs2_sb { | |
112 | struct gfs2_meta_header sb_header; | |
113 | ||
114 | __be32 sb_fs_format; | |
115 | __be32 sb_multihost_format; | |
116 | __u32 __pad0; /* Was superblock flags in gfs1 */ | |
117 | ||
118 | __be32 sb_bsize; | |
119 | __be32 sb_bsize_shift; | |
120 | __u32 __pad1; /* Was journal segment size in gfs1 */ | |
121 | ||
122 | struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */ | |
123 | struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */ | |
124 | struct gfs2_inum sb_root_dir; | |
125 | ||
126 | char sb_lockproto[GFS2_LOCKNAME_LEN]; | |
127 | char sb_locktable[GFS2_LOCKNAME_LEN]; | |
128 | /* In gfs1, quota and license dinodes followed */ | |
129 | }; | |
130 | ||
f50dfaf7 AV |
131 | struct gfs2_sb_host { |
132 | struct gfs2_meta_header sb_header; | |
133 | ||
bc558c87 AV |
134 | __u32 sb_fs_format; |
135 | __u32 sb_multihost_format; | |
f50dfaf7 | 136 | |
bc558c87 AV |
137 | __u32 sb_bsize; |
138 | __u32 sb_bsize_shift; | |
f50dfaf7 AV |
139 | |
140 | struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */ | |
f50dfaf7 AV |
141 | struct gfs2_inum sb_root_dir; |
142 | ||
143 | char sb_lockproto[GFS2_LOCKNAME_LEN]; | |
144 | char sb_locktable[GFS2_LOCKNAME_LEN]; | |
145 | /* In gfs1, quota and license dinodes followed */ | |
146 | }; | |
147 | ||
b3b94faa DT |
148 | /* |
149 | * resource index structure | |
150 | */ | |
151 | ||
152 | struct gfs2_rindex { | |
153 | __be64 ri_addr; /* grp block disk address */ | |
154 | __be32 ri_length; /* length of rgrp header in fs blocks */ | |
155 | __u32 __pad; | |
156 | ||
157 | __be64 ri_data0; /* first data location */ | |
158 | __be32 ri_data; /* num of data blocks in rgrp */ | |
159 | ||
160 | __be32 ri_bitbytes; /* number of bytes in data bitmaps */ | |
161 | ||
162 | __u8 ri_reserved[64]; | |
163 | }; | |
164 | ||
165 | /* | |
166 | * resource group header structure | |
167 | */ | |
168 | ||
169 | /* Number of blocks per byte in rgrp */ | |
170 | #define GFS2_NBBY 4 | |
171 | #define GFS2_BIT_SIZE 2 | |
172 | #define GFS2_BIT_MASK 0x00000003 | |
173 | ||
174 | #define GFS2_BLKST_FREE 0 | |
175 | #define GFS2_BLKST_USED 1 | |
feaa7bba | 176 | #define GFS2_BLKST_UNLINKED 2 |
b3b94faa DT |
177 | #define GFS2_BLKST_DINODE 3 |
178 | ||
179 | #define GFS2_RGF_JOURNAL 0x00000001 | |
180 | #define GFS2_RGF_METAONLY 0x00000002 | |
181 | #define GFS2_RGF_DATAONLY 0x00000004 | |
182 | #define GFS2_RGF_NOALLOC 0x00000008 | |
183 | ||
184 | struct gfs2_rgrp { | |
185 | struct gfs2_meta_header rg_header; | |
186 | ||
187 | __be32 rg_flags; | |
188 | __be32 rg_free; | |
189 | __be32 rg_dinodes; | |
4340fe62 SW |
190 | __be32 __pad; |
191 | __be64 rg_igeneration; | |
b3b94faa | 192 | |
4340fe62 | 193 | __u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */ |
b3b94faa DT |
194 | }; |
195 | ||
196 | /* | |
197 | * quota structure | |
198 | */ | |
199 | ||
200 | struct gfs2_quota { | |
201 | __be64 qu_limit; | |
202 | __be64 qu_warn; | |
203 | __be64 qu_value; | |
fc69d0d3 | 204 | __u8 qu_reserved[64]; |
b3b94faa DT |
205 | }; |
206 | ||
207 | /* | |
208 | * dinode structure | |
209 | */ | |
210 | ||
211 | #define GFS2_MAX_META_HEIGHT 10 | |
212 | #define GFS2_DIR_MAX_DEPTH 17 | |
213 | ||
214 | #define DT2IF(dt) (((dt) << 12) & S_IFMT) | |
215 | #define IF2DT(sif) (((sif) & S_IFMT) >> 12) | |
216 | ||
7ea9ea83 SW |
217 | enum { |
218 | gfs2fl_Jdata = 0, | |
219 | gfs2fl_ExHash = 1, | |
220 | gfs2fl_Unused = 2, | |
221 | gfs2fl_EaIndirect = 3, | |
222 | gfs2fl_Directio = 4, | |
223 | gfs2fl_Immutable = 5, | |
224 | gfs2fl_AppendOnly = 6, | |
225 | gfs2fl_NoAtime = 7, | |
226 | gfs2fl_Sync = 8, | |
227 | gfs2fl_System = 9, | |
228 | gfs2fl_TruncInProg = 29, | |
229 | gfs2fl_InheritDirectio = 30, | |
230 | gfs2fl_InheritJdata = 31, | |
231 | }; | |
232 | ||
b3b94faa DT |
233 | /* Dinode flags */ |
234 | #define GFS2_DIF_JDATA 0x00000001 | |
235 | #define GFS2_DIF_EXHASH 0x00000002 | |
236 | #define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */ | |
237 | #define GFS2_DIF_EA_INDIRECT 0x00000008 | |
238 | #define GFS2_DIF_DIRECTIO 0x00000010 | |
239 | #define GFS2_DIF_IMMUTABLE 0x00000020 | |
240 | #define GFS2_DIF_APPENDONLY 0x00000040 | |
241 | #define GFS2_DIF_NOATIME 0x00000080 | |
242 | #define GFS2_DIF_SYNC 0x00000100 | |
243 | #define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */ | |
244 | #define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */ | |
245 | #define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 | |
246 | #define GFS2_DIF_INHERIT_JDATA 0x80000000 | |
247 | ||
248 | struct gfs2_dinode { | |
249 | struct gfs2_meta_header di_header; | |
250 | ||
251 | struct gfs2_inum di_num; | |
252 | ||
253 | __be32 di_mode; /* mode of file */ | |
254 | __be32 di_uid; /* owner's user id */ | |
255 | __be32 di_gid; /* owner's group id */ | |
256 | __be32 di_nlink; /* number of links to this file */ | |
257 | __be64 di_size; /* number of bytes in file */ | |
258 | __be64 di_blocks; /* number of blocks in file */ | |
259 | __be64 di_atime; /* time last accessed */ | |
260 | __be64 di_mtime; /* time last modified */ | |
261 | __be64 di_ctime; /* time last changed */ | |
262 | __be32 di_major; /* device major number */ | |
263 | __be32 di_minor; /* device minor number */ | |
264 | ||
265 | /* This section varies from gfs1. Padding added to align with | |
266 | * remainder of dinode | |
267 | */ | |
268 | __be64 di_goal_meta; /* rgrp to alloc from next */ | |
269 | __be64 di_goal_data; /* data block goal */ | |
4340fe62 | 270 | __be64 di_generation; /* generation number for NFS */ |
b3b94faa DT |
271 | |
272 | __be32 di_flags; /* GFS2_DIF_... */ | |
273 | __be32 di_payload_format; /* GFS2_FORMAT_... */ | |
274 | __u16 __pad1; /* Was ditype in gfs1 */ | |
275 | __be16 di_height; /* height of metadata */ | |
276 | __u32 __pad2; /* Unused incarnation number from gfs1 */ | |
277 | ||
278 | /* These only apply to directories */ | |
279 | __u16 __pad3; /* Padding */ | |
280 | __be16 di_depth; /* Number of bits in the table */ | |
281 | __be32 di_entries; /* The number of entries in the directory */ | |
282 | ||
283 | struct gfs2_inum __pad4; /* Unused even in current gfs1 */ | |
284 | ||
285 | __be64 di_eattr; /* extended attribute block number */ | |
286 | ||
287 | __u8 di_reserved[56]; | |
288 | }; | |
289 | ||
3ca68df6 AV |
290 | struct gfs2_dinode_host { |
291 | struct gfs2_meta_header di_header; | |
292 | ||
293 | struct gfs2_inum di_num; | |
294 | ||
5c6edb57 AV |
295 | __u32 di_mode; /* mode of file */ |
296 | __u32 di_uid; /* owner's user id */ | |
297 | __u32 di_gid; /* owner's group id */ | |
298 | __u32 di_nlink; /* number of links to this file */ | |
299 | __u64 di_size; /* number of bytes in file */ | |
300 | __u64 di_blocks; /* number of blocks in file */ | |
301 | __u64 di_atime; /* time last accessed */ | |
302 | __u64 di_mtime; /* time last modified */ | |
303 | __u64 di_ctime; /* time last changed */ | |
304 | __u32 di_major; /* device major number */ | |
305 | __u32 di_minor; /* device minor number */ | |
3ca68df6 AV |
306 | |
307 | /* This section varies from gfs1. Padding added to align with | |
308 | * remainder of dinode | |
309 | */ | |
5c6edb57 AV |
310 | __u64 di_goal_meta; /* rgrp to alloc from next */ |
311 | __u64 di_goal_data; /* data block goal */ | |
312 | __u64 di_generation; /* generation number for NFS */ | |
3ca68df6 | 313 | |
5c6edb57 AV |
314 | __u32 di_flags; /* GFS2_DIF_... */ |
315 | __u32 di_payload_format; /* GFS2_FORMAT_... */ | |
316 | __u16 di_height; /* height of metadata */ | |
3ca68df6 AV |
317 | |
318 | /* These only apply to directories */ | |
5c6edb57 AV |
319 | __u16 di_depth; /* Number of bits in the table */ |
320 | __u32 di_entries; /* The number of entries in the directory */ | |
3ca68df6 | 321 | |
5c6edb57 | 322 | __u64 di_eattr; /* extended attribute block number */ |
3ca68df6 AV |
323 | }; |
324 | ||
b3b94faa DT |
325 | /* |
326 | * directory structure - many of these per directory file | |
327 | */ | |
328 | ||
329 | #define GFS2_FNAMESIZE 255 | |
330 | #define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7) | |
331 | ||
332 | struct gfs2_dirent { | |
333 | struct gfs2_inum de_inum; | |
334 | __be32 de_hash; | |
fc69d0d3 SW |
335 | __be16 de_rec_len; |
336 | __be16 de_name_len; | |
337 | __be16 de_type; | |
338 | __u8 __pad[14]; | |
b3b94faa DT |
339 | }; |
340 | ||
341 | /* | |
342 | * Header of leaf directory nodes | |
343 | */ | |
344 | ||
345 | struct gfs2_leaf { | |
346 | struct gfs2_meta_header lf_header; | |
347 | ||
348 | __be16 lf_depth; /* Depth of leaf */ | |
349 | __be16 lf_entries; /* Number of dirents in leaf */ | |
350 | __be32 lf_dirent_format; /* Format of the dirents */ | |
351 | __be64 lf_next; /* Next leaf, if overflow */ | |
352 | ||
fc69d0d3 | 353 | __u8 lf_reserved[64]; |
b3b94faa DT |
354 | }; |
355 | ||
356 | /* | |
357 | * Extended attribute header format | |
358 | */ | |
359 | ||
360 | #define GFS2_EA_MAX_NAME_LEN 255 | |
361 | #define GFS2_EA_MAX_DATA_LEN 65536 | |
362 | ||
363 | #define GFS2_EATYPE_UNUSED 0 | |
364 | #define GFS2_EATYPE_USR 1 | |
365 | #define GFS2_EATYPE_SYS 2 | |
639b6d79 | 366 | #define GFS2_EATYPE_SECURITY 3 |
b3b94faa | 367 | |
639b6d79 | 368 | #define GFS2_EATYPE_LAST 3 |
b3b94faa DT |
369 | #define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST) |
370 | ||
371 | #define GFS2_EAFLAG_LAST 0x01 /* last ea in block */ | |
372 | ||
373 | struct gfs2_ea_header { | |
374 | __be32 ea_rec_len; | |
375 | __be32 ea_data_len; | |
376 | __u8 ea_name_len; /* no NULL pointer after the string */ | |
377 | __u8 ea_type; /* GFS2_EATYPE_... */ | |
378 | __u8 ea_flags; /* GFS2_EAFLAG_... */ | |
379 | __u8 ea_num_ptrs; | |
380 | __u32 __pad; | |
381 | }; | |
382 | ||
383 | /* | |
384 | * Log header structure | |
385 | */ | |
386 | ||
387 | #define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */ | |
388 | ||
389 | struct gfs2_log_header { | |
390 | struct gfs2_meta_header lh_header; | |
391 | ||
392 | __be64 lh_sequence; /* Sequence number of this transaction */ | |
393 | __be32 lh_flags; /* GFS2_LOG_HEAD_... */ | |
394 | __be32 lh_tail; /* Block number of log tail */ | |
395 | __be32 lh_blkno; | |
396 | __be32 lh_hash; | |
397 | }; | |
398 | ||
399 | /* | |
400 | * Log type descriptor | |
401 | */ | |
402 | ||
403 | #define GFS2_LOG_DESC_METADATA 300 | |
404 | /* ld_data1 is the number of metadata blocks in the descriptor. | |
405 | ld_data2 is unused. */ | |
406 | ||
407 | #define GFS2_LOG_DESC_REVOKE 301 | |
408 | /* ld_data1 is the number of revoke blocks in the descriptor. | |
409 | ld_data2 is unused. */ | |
410 | ||
18ec7d5c SW |
411 | #define GFS2_LOG_DESC_JDATA 302 |
412 | /* ld_data1 is the number of data blocks in the descriptor. | |
413 | ld_data2 is unused. */ | |
414 | ||
b3b94faa DT |
415 | struct gfs2_log_descriptor { |
416 | struct gfs2_meta_header ld_header; | |
417 | ||
418 | __be32 ld_type; /* GFS2_LOG_DESC_... */ | |
419 | __be32 ld_length; /* Number of buffers in this chunk */ | |
420 | __be32 ld_data1; /* descriptor-specific field */ | |
421 | __be32 ld_data2; /* descriptor-specific field */ | |
422 | ||
423 | __u8 ld_reserved[32]; | |
424 | }; | |
425 | ||
426 | /* | |
427 | * Inum Range | |
428 | * Describe a range of formal inode numbers allocated to | |
429 | * one machine to assign to inodes. | |
430 | */ | |
431 | ||
432 | #define GFS2_INUM_QUANTUM 1048576 | |
433 | ||
434 | struct gfs2_inum_range { | |
435 | __be64 ir_start; | |
436 | __be64 ir_length; | |
437 | }; | |
438 | ||
439 | /* | |
440 | * Statfs change | |
441 | * Describes an change to the pool of free and allocated | |
442 | * blocks. | |
443 | */ | |
444 | ||
445 | struct gfs2_statfs_change { | |
446 | __be64 sc_total; | |
447 | __be64 sc_free; | |
448 | __be64 sc_dinodes; | |
449 | }; | |
450 | ||
b3b94faa DT |
451 | /* |
452 | * Quota change | |
453 | * Describes an allocation change for a particular | |
454 | * user or group. | |
455 | */ | |
456 | ||
457 | #define GFS2_QCF_USER 0x00000001 | |
458 | ||
459 | struct gfs2_quota_change { | |
460 | __be64 qc_change; | |
461 | __be32 qc_flags; /* GFS2_QCF_... */ | |
462 | __be32 qc_id; | |
463 | }; | |
464 | ||
18ec7d5c | 465 | #ifdef __KERNEL__ |
b3b94faa DT |
466 | /* Translation functions */ |
467 | ||
38c60ef2 SW |
468 | extern void gfs2_inum_in(struct gfs2_inum *no, const void *buf); |
469 | extern void gfs2_inum_out(const struct gfs2_inum *no, void *buf); | |
f50dfaf7 | 470 | extern void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf); |
38c60ef2 SW |
471 | extern void gfs2_rindex_in(struct gfs2_rindex *ri, const void *buf); |
472 | extern void gfs2_rindex_out(const struct gfs2_rindex *ri, void *buf); | |
473 | extern void gfs2_rgrp_in(struct gfs2_rgrp *rg, const void *buf); | |
474 | extern void gfs2_rgrp_out(const struct gfs2_rgrp *rg, void *buf); | |
475 | extern void gfs2_quota_in(struct gfs2_quota *qu, const void *buf); | |
476 | extern void gfs2_quota_out(const struct gfs2_quota *qu, void *buf); | |
3ca68df6 AV |
477 | extern void gfs2_dinode_in(struct gfs2_dinode_host *di, const void *buf); |
478 | extern void gfs2_dinode_out(const struct gfs2_dinode_host *di, void *buf); | |
38c60ef2 SW |
479 | extern void gfs2_ea_header_in(struct gfs2_ea_header *ea, const void *buf); |
480 | extern void gfs2_ea_header_out(const struct gfs2_ea_header *ea, void *buf); | |
481 | extern void gfs2_log_header_in(struct gfs2_log_header *lh, const void *buf); | |
482 | extern void gfs2_inum_range_in(struct gfs2_inum_range *ir, const void *buf); | |
483 | extern void gfs2_inum_range_out(const struct gfs2_inum_range *ir, void *buf); | |
484 | extern void gfs2_statfs_change_in(struct gfs2_statfs_change *sc, const void *buf); | |
485 | extern void gfs2_statfs_change_out(const struct gfs2_statfs_change *sc, void *buf); | |
486 | extern void gfs2_quota_change_in(struct gfs2_quota_change *qc, const void *buf); | |
b3b94faa DT |
487 | |
488 | /* Printing functions */ | |
489 | ||
38c60ef2 | 490 | extern void gfs2_rindex_print(const struct gfs2_rindex *ri); |
3ca68df6 | 491 | extern void gfs2_dinode_print(const struct gfs2_dinode_host *di); |
b3b94faa | 492 | |
18ec7d5c SW |
493 | #endif /* __KERNEL__ */ |
494 | ||
b3b94faa | 495 | #endif /* __GFS2_ONDISK_DOT_H__ */ |