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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 | ||
131 | /* | |
132 | * resource index structure | |
133 | */ | |
134 | ||
135 | struct gfs2_rindex { | |
136 | __be64 ri_addr; /* grp block disk address */ | |
137 | __be32 ri_length; /* length of rgrp header in fs blocks */ | |
138 | __u32 __pad; | |
139 | ||
140 | __be64 ri_data0; /* first data location */ | |
141 | __be32 ri_data; /* num of data blocks in rgrp */ | |
142 | ||
143 | __be32 ri_bitbytes; /* number of bytes in data bitmaps */ | |
144 | ||
145 | __u8 ri_reserved[64]; | |
146 | }; | |
147 | ||
148 | /* | |
149 | * resource group header structure | |
150 | */ | |
151 | ||
152 | /* Number of blocks per byte in rgrp */ | |
153 | #define GFS2_NBBY 4 | |
154 | #define GFS2_BIT_SIZE 2 | |
155 | #define GFS2_BIT_MASK 0x00000003 | |
156 | ||
157 | #define GFS2_BLKST_FREE 0 | |
158 | #define GFS2_BLKST_USED 1 | |
feaa7bba | 159 | #define GFS2_BLKST_UNLINKED 2 |
b3b94faa DT |
160 | #define GFS2_BLKST_DINODE 3 |
161 | ||
162 | #define GFS2_RGF_JOURNAL 0x00000001 | |
163 | #define GFS2_RGF_METAONLY 0x00000002 | |
164 | #define GFS2_RGF_DATAONLY 0x00000004 | |
165 | #define GFS2_RGF_NOALLOC 0x00000008 | |
166 | ||
167 | struct gfs2_rgrp { | |
168 | struct gfs2_meta_header rg_header; | |
169 | ||
170 | __be32 rg_flags; | |
171 | __be32 rg_free; | |
172 | __be32 rg_dinodes; | |
173 | ||
174 | __u8 rg_reserved[92]; /* Several fields from gfs1 now reserved */ | |
175 | }; | |
176 | ||
177 | /* | |
178 | * quota structure | |
179 | */ | |
180 | ||
181 | struct gfs2_quota { | |
182 | __be64 qu_limit; | |
183 | __be64 qu_warn; | |
184 | __be64 qu_value; | |
fc69d0d3 | 185 | __u8 qu_reserved[64]; |
b3b94faa DT |
186 | }; |
187 | ||
188 | /* | |
189 | * dinode structure | |
190 | */ | |
191 | ||
192 | #define GFS2_MAX_META_HEIGHT 10 | |
193 | #define GFS2_DIR_MAX_DEPTH 17 | |
194 | ||
195 | #define DT2IF(dt) (((dt) << 12) & S_IFMT) | |
196 | #define IF2DT(sif) (((sif) & S_IFMT) >> 12) | |
197 | ||
7ea9ea83 SW |
198 | enum { |
199 | gfs2fl_Jdata = 0, | |
200 | gfs2fl_ExHash = 1, | |
201 | gfs2fl_Unused = 2, | |
202 | gfs2fl_EaIndirect = 3, | |
203 | gfs2fl_Directio = 4, | |
204 | gfs2fl_Immutable = 5, | |
205 | gfs2fl_AppendOnly = 6, | |
206 | gfs2fl_NoAtime = 7, | |
207 | gfs2fl_Sync = 8, | |
208 | gfs2fl_System = 9, | |
209 | gfs2fl_TruncInProg = 29, | |
210 | gfs2fl_InheritDirectio = 30, | |
211 | gfs2fl_InheritJdata = 31, | |
212 | }; | |
213 | ||
b3b94faa DT |
214 | /* Dinode flags */ |
215 | #define GFS2_DIF_JDATA 0x00000001 | |
216 | #define GFS2_DIF_EXHASH 0x00000002 | |
217 | #define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */ | |
218 | #define GFS2_DIF_EA_INDIRECT 0x00000008 | |
219 | #define GFS2_DIF_DIRECTIO 0x00000010 | |
220 | #define GFS2_DIF_IMMUTABLE 0x00000020 | |
221 | #define GFS2_DIF_APPENDONLY 0x00000040 | |
222 | #define GFS2_DIF_NOATIME 0x00000080 | |
223 | #define GFS2_DIF_SYNC 0x00000100 | |
224 | #define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */ | |
225 | #define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */ | |
226 | #define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 | |
227 | #define GFS2_DIF_INHERIT_JDATA 0x80000000 | |
228 | ||
229 | struct gfs2_dinode { | |
230 | struct gfs2_meta_header di_header; | |
231 | ||
232 | struct gfs2_inum di_num; | |
233 | ||
234 | __be32 di_mode; /* mode of file */ | |
235 | __be32 di_uid; /* owner's user id */ | |
236 | __be32 di_gid; /* owner's group id */ | |
237 | __be32 di_nlink; /* number of links to this file */ | |
238 | __be64 di_size; /* number of bytes in file */ | |
239 | __be64 di_blocks; /* number of blocks in file */ | |
240 | __be64 di_atime; /* time last accessed */ | |
241 | __be64 di_mtime; /* time last modified */ | |
242 | __be64 di_ctime; /* time last changed */ | |
243 | __be32 di_major; /* device major number */ | |
244 | __be32 di_minor; /* device minor number */ | |
245 | ||
246 | /* This section varies from gfs1. Padding added to align with | |
247 | * remainder of dinode | |
248 | */ | |
249 | __be64 di_goal_meta; /* rgrp to alloc from next */ | |
250 | __be64 di_goal_data; /* data block goal */ | |
251 | __u32 __pad[2]; | |
252 | ||
253 | __be32 di_flags; /* GFS2_DIF_... */ | |
254 | __be32 di_payload_format; /* GFS2_FORMAT_... */ | |
255 | __u16 __pad1; /* Was ditype in gfs1 */ | |
256 | __be16 di_height; /* height of metadata */ | |
257 | __u32 __pad2; /* Unused incarnation number from gfs1 */ | |
258 | ||
259 | /* These only apply to directories */ | |
260 | __u16 __pad3; /* Padding */ | |
261 | __be16 di_depth; /* Number of bits in the table */ | |
262 | __be32 di_entries; /* The number of entries in the directory */ | |
263 | ||
264 | struct gfs2_inum __pad4; /* Unused even in current gfs1 */ | |
265 | ||
266 | __be64 di_eattr; /* extended attribute block number */ | |
267 | ||
268 | __u8 di_reserved[56]; | |
269 | }; | |
270 | ||
271 | /* | |
272 | * directory structure - many of these per directory file | |
273 | */ | |
274 | ||
275 | #define GFS2_FNAMESIZE 255 | |
276 | #define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7) | |
277 | ||
278 | struct gfs2_dirent { | |
279 | struct gfs2_inum de_inum; | |
280 | __be32 de_hash; | |
fc69d0d3 SW |
281 | __be16 de_rec_len; |
282 | __be16 de_name_len; | |
283 | __be16 de_type; | |
284 | __u8 __pad[14]; | |
b3b94faa DT |
285 | }; |
286 | ||
287 | /* | |
288 | * Header of leaf directory nodes | |
289 | */ | |
290 | ||
291 | struct gfs2_leaf { | |
292 | struct gfs2_meta_header lf_header; | |
293 | ||
294 | __be16 lf_depth; /* Depth of leaf */ | |
295 | __be16 lf_entries; /* Number of dirents in leaf */ | |
296 | __be32 lf_dirent_format; /* Format of the dirents */ | |
297 | __be64 lf_next; /* Next leaf, if overflow */ | |
298 | ||
fc69d0d3 | 299 | __u8 lf_reserved[64]; |
b3b94faa DT |
300 | }; |
301 | ||
302 | /* | |
303 | * Extended attribute header format | |
304 | */ | |
305 | ||
306 | #define GFS2_EA_MAX_NAME_LEN 255 | |
307 | #define GFS2_EA_MAX_DATA_LEN 65536 | |
308 | ||
309 | #define GFS2_EATYPE_UNUSED 0 | |
310 | #define GFS2_EATYPE_USR 1 | |
311 | #define GFS2_EATYPE_SYS 2 | |
639b6d79 | 312 | #define GFS2_EATYPE_SECURITY 3 |
b3b94faa | 313 | |
639b6d79 | 314 | #define GFS2_EATYPE_LAST 3 |
b3b94faa DT |
315 | #define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST) |
316 | ||
317 | #define GFS2_EAFLAG_LAST 0x01 /* last ea in block */ | |
318 | ||
319 | struct gfs2_ea_header { | |
320 | __be32 ea_rec_len; | |
321 | __be32 ea_data_len; | |
322 | __u8 ea_name_len; /* no NULL pointer after the string */ | |
323 | __u8 ea_type; /* GFS2_EATYPE_... */ | |
324 | __u8 ea_flags; /* GFS2_EAFLAG_... */ | |
325 | __u8 ea_num_ptrs; | |
326 | __u32 __pad; | |
327 | }; | |
328 | ||
329 | /* | |
330 | * Log header structure | |
331 | */ | |
332 | ||
333 | #define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */ | |
334 | ||
335 | struct gfs2_log_header { | |
336 | struct gfs2_meta_header lh_header; | |
337 | ||
338 | __be64 lh_sequence; /* Sequence number of this transaction */ | |
339 | __be32 lh_flags; /* GFS2_LOG_HEAD_... */ | |
340 | __be32 lh_tail; /* Block number of log tail */ | |
341 | __be32 lh_blkno; | |
342 | __be32 lh_hash; | |
343 | }; | |
344 | ||
345 | /* | |
346 | * Log type descriptor | |
347 | */ | |
348 | ||
349 | #define GFS2_LOG_DESC_METADATA 300 | |
350 | /* ld_data1 is the number of metadata blocks in the descriptor. | |
351 | ld_data2 is unused. */ | |
352 | ||
353 | #define GFS2_LOG_DESC_REVOKE 301 | |
354 | /* ld_data1 is the number of revoke blocks in the descriptor. | |
355 | ld_data2 is unused. */ | |
356 | ||
18ec7d5c SW |
357 | #define GFS2_LOG_DESC_JDATA 302 |
358 | /* ld_data1 is the number of data blocks in the descriptor. | |
359 | ld_data2 is unused. */ | |
360 | ||
b3b94faa DT |
361 | struct gfs2_log_descriptor { |
362 | struct gfs2_meta_header ld_header; | |
363 | ||
364 | __be32 ld_type; /* GFS2_LOG_DESC_... */ | |
365 | __be32 ld_length; /* Number of buffers in this chunk */ | |
366 | __be32 ld_data1; /* descriptor-specific field */ | |
367 | __be32 ld_data2; /* descriptor-specific field */ | |
368 | ||
369 | __u8 ld_reserved[32]; | |
370 | }; | |
371 | ||
372 | /* | |
373 | * Inum Range | |
374 | * Describe a range of formal inode numbers allocated to | |
375 | * one machine to assign to inodes. | |
376 | */ | |
377 | ||
378 | #define GFS2_INUM_QUANTUM 1048576 | |
379 | ||
380 | struct gfs2_inum_range { | |
381 | __be64 ir_start; | |
382 | __be64 ir_length; | |
383 | }; | |
384 | ||
385 | /* | |
386 | * Statfs change | |
387 | * Describes an change to the pool of free and allocated | |
388 | * blocks. | |
389 | */ | |
390 | ||
391 | struct gfs2_statfs_change { | |
392 | __be64 sc_total; | |
393 | __be64 sc_free; | |
394 | __be64 sc_dinodes; | |
395 | }; | |
396 | ||
b3b94faa DT |
397 | /* |
398 | * Quota change | |
399 | * Describes an allocation change for a particular | |
400 | * user or group. | |
401 | */ | |
402 | ||
403 | #define GFS2_QCF_USER 0x00000001 | |
404 | ||
405 | struct gfs2_quota_change { | |
406 | __be64 qc_change; | |
407 | __be32 qc_flags; /* GFS2_QCF_... */ | |
408 | __be32 qc_id; | |
409 | }; | |
410 | ||
18ec7d5c | 411 | #ifdef __KERNEL__ |
b3b94faa DT |
412 | /* Translation functions */ |
413 | ||
414 | extern void gfs2_inum_in(struct gfs2_inum *no, char *buf); | |
c752666c | 415 | extern void gfs2_inum_out(const struct gfs2_inum *no, char *buf); |
b3b94faa | 416 | extern void gfs2_sb_in(struct gfs2_sb *sb, char *buf); |
b3b94faa DT |
417 | extern void gfs2_rindex_in(struct gfs2_rindex *ri, char *buf); |
418 | extern void gfs2_rindex_out(struct gfs2_rindex *ri, char *buf); | |
419 | extern void gfs2_rgrp_in(struct gfs2_rgrp *rg, char *buf); | |
420 | extern void gfs2_rgrp_out(struct gfs2_rgrp *rg, char *buf); | |
421 | extern void gfs2_quota_in(struct gfs2_quota *qu, char *buf); | |
422 | extern void gfs2_quota_out(struct gfs2_quota *qu, char *buf); | |
423 | extern void gfs2_dinode_in(struct gfs2_dinode *di, char *buf); | |
424 | extern void gfs2_dinode_out(struct gfs2_dinode *di, char *buf); | |
b3b94faa DT |
425 | extern void gfs2_ea_header_in(struct gfs2_ea_header *ea, char *buf); |
426 | extern void gfs2_ea_header_out(struct gfs2_ea_header *ea, char *buf); | |
427 | extern void gfs2_log_header_in(struct gfs2_log_header *lh, char *buf); | |
428 | extern void gfs2_inum_range_in(struct gfs2_inum_range *ir, char *buf); | |
429 | extern void gfs2_inum_range_out(struct gfs2_inum_range *ir, char *buf); | |
430 | extern void gfs2_statfs_change_in(struct gfs2_statfs_change *sc, char *buf); | |
431 | extern void gfs2_statfs_change_out(struct gfs2_statfs_change *sc, char *buf); | |
b3b94faa | 432 | extern void gfs2_quota_change_in(struct gfs2_quota_change *qc, char *buf); |
b3b94faa DT |
433 | |
434 | /* Printing functions */ | |
435 | ||
b3b94faa | 436 | extern void gfs2_rindex_print(struct gfs2_rindex *ri); |
b3b94faa | 437 | extern void gfs2_dinode_print(struct gfs2_dinode *di); |
b3b94faa | 438 | |
18ec7d5c SW |
439 | #endif /* __KERNEL__ */ |
440 | ||
b3b94faa | 441 | #endif /* __GFS2_ONDISK_DOT_H__ */ |