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 | ||
57 | /* | |
58 | * Generic metadata head structure | |
59 | * Every inplace buffer logged in the journal must start with this. | |
60 | */ | |
61 | ||
62 | #define GFS2_METATYPE_NONE 0 | |
63 | #define GFS2_METATYPE_SB 1 | |
64 | #define GFS2_METATYPE_RG 2 | |
65 | #define GFS2_METATYPE_RB 3 | |
66 | #define GFS2_METATYPE_DI 4 | |
67 | #define GFS2_METATYPE_IN 5 | |
68 | #define GFS2_METATYPE_LF 6 | |
69 | #define GFS2_METATYPE_JD 7 | |
70 | #define GFS2_METATYPE_LH 8 | |
71 | #define GFS2_METATYPE_LD 9 | |
fc69d0d3 SW |
72 | #define GFS2_METATYPE_LB 12 |
73 | #define GFS2_METATYPE_EA 10 | |
74 | #define GFS2_METATYPE_ED 11 | |
b3b94faa DT |
75 | #define GFS2_METATYPE_QC 14 |
76 | ||
77 | struct gfs2_meta_header { | |
78 | __be32 mh_magic; | |
79 | __be32 mh_type; | |
80 | __be64 __pad0; /* Was generation number in gfs1 */ | |
81 | __be32 mh_format; | |
82 | __be32 __pad1; /* Was incarnation number in gfs1 */ | |
83 | }; | |
84 | ||
85 | /* | |
86 | * super-block structure | |
87 | * | |
88 | * It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes) | |
89 | * | |
90 | * Order is important, need to be able to read old superblocks to do on-disk | |
91 | * version upgrades. | |
92 | */ | |
93 | ||
94 | /* Address of superblock in GFS2 basic blocks */ | |
95 | #define GFS2_SB_ADDR 128 | |
96 | ||
97 | /* The lock number for the superblock (must be zero) */ | |
98 | #define GFS2_SB_LOCK 0 | |
99 | ||
100 | /* Requirement: GFS2_LOCKNAME_LEN % 8 == 0 | |
101 | Includes: the fencing zero at the end */ | |
102 | #define GFS2_LOCKNAME_LEN 64 | |
103 | ||
104 | struct gfs2_sb { | |
105 | struct gfs2_meta_header sb_header; | |
106 | ||
107 | __be32 sb_fs_format; | |
108 | __be32 sb_multihost_format; | |
109 | __u32 __pad0; /* Was superblock flags in gfs1 */ | |
110 | ||
111 | __be32 sb_bsize; | |
112 | __be32 sb_bsize_shift; | |
113 | __u32 __pad1; /* Was journal segment size in gfs1 */ | |
114 | ||
115 | struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */ | |
116 | struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */ | |
117 | struct gfs2_inum sb_root_dir; | |
118 | ||
119 | char sb_lockproto[GFS2_LOCKNAME_LEN]; | |
120 | char sb_locktable[GFS2_LOCKNAME_LEN]; | |
121 | /* In gfs1, quota and license dinodes followed */ | |
122 | }; | |
123 | ||
124 | /* | |
125 | * resource index structure | |
126 | */ | |
127 | ||
128 | struct gfs2_rindex { | |
129 | __be64 ri_addr; /* grp block disk address */ | |
130 | __be32 ri_length; /* length of rgrp header in fs blocks */ | |
131 | __u32 __pad; | |
132 | ||
133 | __be64 ri_data0; /* first data location */ | |
134 | __be32 ri_data; /* num of data blocks in rgrp */ | |
135 | ||
136 | __be32 ri_bitbytes; /* number of bytes in data bitmaps */ | |
137 | ||
138 | __u8 ri_reserved[64]; | |
139 | }; | |
140 | ||
141 | /* | |
142 | * resource group header structure | |
143 | */ | |
144 | ||
145 | /* Number of blocks per byte in rgrp */ | |
146 | #define GFS2_NBBY 4 | |
147 | #define GFS2_BIT_SIZE 2 | |
148 | #define GFS2_BIT_MASK 0x00000003 | |
149 | ||
150 | #define GFS2_BLKST_FREE 0 | |
151 | #define GFS2_BLKST_USED 1 | |
feaa7bba | 152 | #define GFS2_BLKST_UNLINKED 2 |
b3b94faa DT |
153 | #define GFS2_BLKST_DINODE 3 |
154 | ||
155 | #define GFS2_RGF_JOURNAL 0x00000001 | |
156 | #define GFS2_RGF_METAONLY 0x00000002 | |
157 | #define GFS2_RGF_DATAONLY 0x00000004 | |
158 | #define GFS2_RGF_NOALLOC 0x00000008 | |
159 | ||
160 | struct gfs2_rgrp { | |
161 | struct gfs2_meta_header rg_header; | |
162 | ||
163 | __be32 rg_flags; | |
164 | __be32 rg_free; | |
165 | __be32 rg_dinodes; | |
4340fe62 SW |
166 | __be32 __pad; |
167 | __be64 rg_igeneration; | |
b3b94faa | 168 | |
4340fe62 | 169 | __u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */ |
b3b94faa DT |
170 | }; |
171 | ||
2d9a4bbf AD |
172 | /* |
173 | * quota linked list: user quotas and group quotas form two separate | |
174 | * singly linked lists. ll_next stores uids or gids of next quotas in the | |
175 | * linked list. | |
176 | ||
177 | Given the uid/gid, how to calculate the quota file offsets for the corresponding | |
178 | gfs2_quota structures on disk: | |
179 | ||
180 | for user quotas, given uid, | |
181 | offset = uid * sizeof(struct gfs2_quota); | |
182 | ||
183 | for group quotas, given gid, | |
184 | offset = (gid * sizeof(struct gfs2_quota)) + sizeof(struct gfs2_quota); | |
185 | ||
186 | ||
187 | uid:0 gid:0 uid:12 gid:12 uid:17 gid:17 uid:5142 gid:5142 | |
188 | +-------+-------+ +-------+-------+ +-------+- - - -+ +- - - -+-------+ | |
189 | | valid | valid | :: | valid | valid | :: | valid | inval | :: | inval | valid | | |
190 | +-------+-------+ +-------+-------+ +-------+- - - -+ +- - - -+-------+ | |
191 | next:12 next:12 next:17 next:5142 next:NULL next:NULL | |
192 | | | | | |<-- user quota list | | |
193 | \______|___________/ \______|___________/ group quota list -->| | |
194 | | | | | |
195 | \__________________/ \_______________________________________/ | |
196 | ||
197 | */ | |
198 | ||
b3b94faa DT |
199 | /* |
200 | * quota structure | |
201 | */ | |
202 | ||
203 | struct gfs2_quota { | |
204 | __be64 qu_limit; | |
205 | __be64 qu_warn; | |
206 | __be64 qu_value; | |
2d9a4bbf AD |
207 | __be32 qu_ll_next; /* location of next quota in list */ |
208 | __u8 qu_reserved[60]; | |
b3b94faa DT |
209 | }; |
210 | ||
211 | /* | |
212 | * dinode structure | |
213 | */ | |
214 | ||
215 | #define GFS2_MAX_META_HEIGHT 10 | |
216 | #define GFS2_DIR_MAX_DEPTH 17 | |
217 | ||
218 | #define DT2IF(dt) (((dt) << 12) & S_IFMT) | |
219 | #define IF2DT(sif) (((sif) & S_IFMT) >> 12) | |
220 | ||
7ea9ea83 SW |
221 | enum { |
222 | gfs2fl_Jdata = 0, | |
223 | gfs2fl_ExHash = 1, | |
224 | gfs2fl_Unused = 2, | |
225 | gfs2fl_EaIndirect = 3, | |
226 | gfs2fl_Directio = 4, | |
227 | gfs2fl_Immutable = 5, | |
228 | gfs2fl_AppendOnly = 6, | |
229 | gfs2fl_NoAtime = 7, | |
230 | gfs2fl_Sync = 8, | |
231 | gfs2fl_System = 9, | |
232 | gfs2fl_TruncInProg = 29, | |
233 | gfs2fl_InheritDirectio = 30, | |
234 | gfs2fl_InheritJdata = 31, | |
235 | }; | |
236 | ||
b3b94faa DT |
237 | /* Dinode flags */ |
238 | #define GFS2_DIF_JDATA 0x00000001 | |
239 | #define GFS2_DIF_EXHASH 0x00000002 | |
240 | #define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */ | |
241 | #define GFS2_DIF_EA_INDIRECT 0x00000008 | |
242 | #define GFS2_DIF_DIRECTIO 0x00000010 | |
243 | #define GFS2_DIF_IMMUTABLE 0x00000020 | |
244 | #define GFS2_DIF_APPENDONLY 0x00000040 | |
245 | #define GFS2_DIF_NOATIME 0x00000080 | |
246 | #define GFS2_DIF_SYNC 0x00000100 | |
247 | #define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */ | |
248 | #define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */ | |
249 | #define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 | |
250 | #define GFS2_DIF_INHERIT_JDATA 0x80000000 | |
251 | ||
252 | struct gfs2_dinode { | |
253 | struct gfs2_meta_header di_header; | |
254 | ||
255 | struct gfs2_inum di_num; | |
256 | ||
257 | __be32 di_mode; /* mode of file */ | |
258 | __be32 di_uid; /* owner's user id */ | |
259 | __be32 di_gid; /* owner's group id */ | |
260 | __be32 di_nlink; /* number of links to this file */ | |
261 | __be64 di_size; /* number of bytes in file */ | |
262 | __be64 di_blocks; /* number of blocks in file */ | |
263 | __be64 di_atime; /* time last accessed */ | |
264 | __be64 di_mtime; /* time last modified */ | |
265 | __be64 di_ctime; /* time last changed */ | |
266 | __be32 di_major; /* device major number */ | |
267 | __be32 di_minor; /* device minor number */ | |
268 | ||
269 | /* This section varies from gfs1. Padding added to align with | |
270 | * remainder of dinode | |
271 | */ | |
272 | __be64 di_goal_meta; /* rgrp to alloc from next */ | |
273 | __be64 di_goal_data; /* data block goal */ | |
4340fe62 | 274 | __be64 di_generation; /* generation number for NFS */ |
b3b94faa DT |
275 | |
276 | __be32 di_flags; /* GFS2_DIF_... */ | |
277 | __be32 di_payload_format; /* GFS2_FORMAT_... */ | |
278 | __u16 __pad1; /* Was ditype in gfs1 */ | |
279 | __be16 di_height; /* height of metadata */ | |
280 | __u32 __pad2; /* Unused incarnation number from gfs1 */ | |
281 | ||
282 | /* These only apply to directories */ | |
283 | __u16 __pad3; /* Padding */ | |
284 | __be16 di_depth; /* Number of bits in the table */ | |
285 | __be32 di_entries; /* The number of entries in the directory */ | |
286 | ||
287 | struct gfs2_inum __pad4; /* Unused even in current gfs1 */ | |
288 | ||
289 | __be64 di_eattr; /* extended attribute block number */ | |
4bd91ba1 SW |
290 | __be32 di_atime_nsec; /* nsec portion of atime */ |
291 | __be32 di_mtime_nsec; /* nsec portion of mtime */ | |
292 | __be32 di_ctime_nsec; /* nsec portion of ctime */ | |
b3b94faa | 293 | |
4bd91ba1 | 294 | __u8 di_reserved[44]; |
b3b94faa DT |
295 | }; |
296 | ||
297 | /* | |
298 | * directory structure - many of these per directory file | |
299 | */ | |
300 | ||
301 | #define GFS2_FNAMESIZE 255 | |
302 | #define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7) | |
303 | ||
304 | struct gfs2_dirent { | |
305 | struct gfs2_inum de_inum; | |
306 | __be32 de_hash; | |
fc69d0d3 SW |
307 | __be16 de_rec_len; |
308 | __be16 de_name_len; | |
309 | __be16 de_type; | |
310 | __u8 __pad[14]; | |
b3b94faa DT |
311 | }; |
312 | ||
313 | /* | |
314 | * Header of leaf directory nodes | |
315 | */ | |
316 | ||
317 | struct gfs2_leaf { | |
318 | struct gfs2_meta_header lf_header; | |
319 | ||
320 | __be16 lf_depth; /* Depth of leaf */ | |
321 | __be16 lf_entries; /* Number of dirents in leaf */ | |
322 | __be32 lf_dirent_format; /* Format of the dirents */ | |
323 | __be64 lf_next; /* Next leaf, if overflow */ | |
324 | ||
fc69d0d3 | 325 | __u8 lf_reserved[64]; |
b3b94faa DT |
326 | }; |
327 | ||
328 | /* | |
329 | * Extended attribute header format | |
330 | */ | |
331 | ||
332 | #define GFS2_EA_MAX_NAME_LEN 255 | |
333 | #define GFS2_EA_MAX_DATA_LEN 65536 | |
334 | ||
335 | #define GFS2_EATYPE_UNUSED 0 | |
336 | #define GFS2_EATYPE_USR 1 | |
337 | #define GFS2_EATYPE_SYS 2 | |
639b6d79 | 338 | #define GFS2_EATYPE_SECURITY 3 |
b3b94faa | 339 | |
639b6d79 | 340 | #define GFS2_EATYPE_LAST 3 |
b3b94faa DT |
341 | #define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST) |
342 | ||
343 | #define GFS2_EAFLAG_LAST 0x01 /* last ea in block */ | |
344 | ||
345 | struct gfs2_ea_header { | |
346 | __be32 ea_rec_len; | |
347 | __be32 ea_data_len; | |
348 | __u8 ea_name_len; /* no NULL pointer after the string */ | |
349 | __u8 ea_type; /* GFS2_EATYPE_... */ | |
350 | __u8 ea_flags; /* GFS2_EAFLAG_... */ | |
351 | __u8 ea_num_ptrs; | |
352 | __u32 __pad; | |
353 | }; | |
354 | ||
355 | /* | |
356 | * Log header structure | |
357 | */ | |
358 | ||
359 | #define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */ | |
360 | ||
361 | struct gfs2_log_header { | |
362 | struct gfs2_meta_header lh_header; | |
363 | ||
364 | __be64 lh_sequence; /* Sequence number of this transaction */ | |
365 | __be32 lh_flags; /* GFS2_LOG_HEAD_... */ | |
366 | __be32 lh_tail; /* Block number of log tail */ | |
367 | __be32 lh_blkno; | |
368 | __be32 lh_hash; | |
369 | }; | |
370 | ||
371 | /* | |
372 | * Log type descriptor | |
373 | */ | |
374 | ||
375 | #define GFS2_LOG_DESC_METADATA 300 | |
376 | /* ld_data1 is the number of metadata blocks in the descriptor. | |
377 | ld_data2 is unused. */ | |
378 | ||
379 | #define GFS2_LOG_DESC_REVOKE 301 | |
380 | /* ld_data1 is the number of revoke blocks in the descriptor. | |
381 | ld_data2 is unused. */ | |
382 | ||
18ec7d5c SW |
383 | #define GFS2_LOG_DESC_JDATA 302 |
384 | /* ld_data1 is the number of data blocks in the descriptor. | |
385 | ld_data2 is unused. */ | |
386 | ||
b3b94faa DT |
387 | struct gfs2_log_descriptor { |
388 | struct gfs2_meta_header ld_header; | |
389 | ||
390 | __be32 ld_type; /* GFS2_LOG_DESC_... */ | |
391 | __be32 ld_length; /* Number of buffers in this chunk */ | |
392 | __be32 ld_data1; /* descriptor-specific field */ | |
393 | __be32 ld_data2; /* descriptor-specific field */ | |
394 | ||
395 | __u8 ld_reserved[32]; | |
396 | }; | |
397 | ||
398 | /* | |
399 | * Inum Range | |
400 | * Describe a range of formal inode numbers allocated to | |
401 | * one machine to assign to inodes. | |
402 | */ | |
403 | ||
404 | #define GFS2_INUM_QUANTUM 1048576 | |
405 | ||
406 | struct gfs2_inum_range { | |
407 | __be64 ir_start; | |
408 | __be64 ir_length; | |
409 | }; | |
410 | ||
411 | /* | |
412 | * Statfs change | |
413 | * Describes an change to the pool of free and allocated | |
414 | * blocks. | |
415 | */ | |
416 | ||
417 | struct gfs2_statfs_change { | |
418 | __be64 sc_total; | |
419 | __be64 sc_free; | |
420 | __be64 sc_dinodes; | |
421 | }; | |
422 | ||
b3b94faa DT |
423 | /* |
424 | * Quota change | |
425 | * Describes an allocation change for a particular | |
426 | * user or group. | |
427 | */ | |
428 | ||
429 | #define GFS2_QCF_USER 0x00000001 | |
430 | ||
431 | struct gfs2_quota_change { | |
432 | __be64 qc_change; | |
433 | __be32 qc_flags; /* GFS2_QCF_... */ | |
434 | __be32 qc_id; | |
435 | }; | |
436 | ||
2a87ab08 AD |
437 | struct gfs2_quota_lvb { |
438 | __be32 qb_magic; | |
518bbde3 | 439 | __u32 __pad; |
2a87ab08 AD |
440 | __be64 qb_limit; /* Hard limit of # blocks to alloc */ |
441 | __be64 qb_warn; /* Warn user when alloc is above this # */ | |
442 | __be64 qb_value; /* Current # blocks allocated */ | |
443 | }; | |
444 | ||
b3b94faa | 445 | #endif /* __GFS2_ONDISK_DOT_H__ */ |