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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 | ||
237416fe JSR |
13 | #include <linux/types.h> |
14 | ||
b3b94faa DT |
15 | #define GFS2_MAGIC 0x01161970 |
16 | #define GFS2_BASIC_BLOCK 512 | |
17 | #define GFS2_BASIC_BLOCK_SHIFT 9 | |
18 | ||
19 | /* Lock numbers of the LM_TYPE_NONDISK type */ | |
20 | ||
21 | #define GFS2_MOUNT_LOCK 0 | |
22 | #define GFS2_LIVE_LOCK 1 | |
23 | #define GFS2_TRANS_LOCK 2 | |
24 | #define GFS2_RENAME_LOCK 3 | |
e0c2a9aa DT |
25 | #define GFS2_CONTROL_LOCK 4 |
26 | #define GFS2_MOUNTED_LOCK 5 | |
b3b94faa DT |
27 | |
28 | /* Format numbers for various metadata types */ | |
29 | ||
30 | #define GFS2_FORMAT_NONE 0 | |
31 | #define GFS2_FORMAT_SB 100 | |
32 | #define GFS2_FORMAT_RG 200 | |
33 | #define GFS2_FORMAT_RB 300 | |
34 | #define GFS2_FORMAT_DI 400 | |
35 | #define GFS2_FORMAT_IN 500 | |
36 | #define GFS2_FORMAT_LF 600 | |
37 | #define GFS2_FORMAT_JD 700 | |
38 | #define GFS2_FORMAT_LH 800 | |
39 | #define GFS2_FORMAT_LD 900 | |
40 | #define GFS2_FORMAT_LB 1000 | |
fc69d0d3 SW |
41 | #define GFS2_FORMAT_EA 1600 |
42 | #define GFS2_FORMAT_ED 1700 | |
b3b94faa DT |
43 | #define GFS2_FORMAT_QC 1400 |
44 | /* These are format numbers for entities contained in files */ | |
fc69d0d3 SW |
45 | #define GFS2_FORMAT_RI 1100 |
46 | #define GFS2_FORMAT_DE 1200 | |
47 | #define GFS2_FORMAT_QU 1500 | |
b3b94faa DT |
48 | /* These are part of the superblock */ |
49 | #define GFS2_FORMAT_FS 1801 | |
50 | #define GFS2_FORMAT_MULTI 1900 | |
51 | ||
52 | /* | |
53 | * An on-disk inode number | |
54 | */ | |
55 | ||
b3b94faa DT |
56 | struct gfs2_inum { |
57 | __be64 no_formal_ino; | |
58 | __be64 no_addr; | |
59 | }; | |
60 | ||
61 | /* | |
62 | * Generic metadata head structure | |
63 | * Every inplace buffer logged in the journal must start with this. | |
64 | */ | |
65 | ||
66 | #define GFS2_METATYPE_NONE 0 | |
67 | #define GFS2_METATYPE_SB 1 | |
68 | #define GFS2_METATYPE_RG 2 | |
69 | #define GFS2_METATYPE_RB 3 | |
70 | #define GFS2_METATYPE_DI 4 | |
71 | #define GFS2_METATYPE_IN 5 | |
72 | #define GFS2_METATYPE_LF 6 | |
73 | #define GFS2_METATYPE_JD 7 | |
74 | #define GFS2_METATYPE_LH 8 | |
75 | #define GFS2_METATYPE_LD 9 | |
fc69d0d3 SW |
76 | #define GFS2_METATYPE_LB 12 |
77 | #define GFS2_METATYPE_EA 10 | |
78 | #define GFS2_METATYPE_ED 11 | |
b3b94faa DT |
79 | #define GFS2_METATYPE_QC 14 |
80 | ||
81 | struct gfs2_meta_header { | |
82 | __be32 mh_magic; | |
83 | __be32 mh_type; | |
84 | __be64 __pad0; /* Was generation number in gfs1 */ | |
85 | __be32 mh_format; | |
0ab7d13f SW |
86 | /* This union is to keep userspace happy */ |
87 | union { | |
88 | __be32 mh_jid; /* Was incarnation number in gfs1 */ | |
89 | __be32 __pad1; | |
90 | }; | |
b3b94faa DT |
91 | }; |
92 | ||
93 | /* | |
94 | * super-block structure | |
95 | * | |
96 | * It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes) | |
97 | * | |
98 | * Order is important, need to be able to read old superblocks to do on-disk | |
99 | * version upgrades. | |
100 | */ | |
101 | ||
102 | /* Address of superblock in GFS2 basic blocks */ | |
103 | #define GFS2_SB_ADDR 128 | |
104 | ||
105 | /* The lock number for the superblock (must be zero) */ | |
106 | #define GFS2_SB_LOCK 0 | |
107 | ||
108 | /* Requirement: GFS2_LOCKNAME_LEN % 8 == 0 | |
109 | Includes: the fencing zero at the end */ | |
110 | #define GFS2_LOCKNAME_LEN 64 | |
111 | ||
112 | struct gfs2_sb { | |
113 | struct gfs2_meta_header sb_header; | |
114 | ||
115 | __be32 sb_fs_format; | |
116 | __be32 sb_multihost_format; | |
117 | __u32 __pad0; /* Was superblock flags in gfs1 */ | |
118 | ||
119 | __be32 sb_bsize; | |
120 | __be32 sb_bsize_shift; | |
121 | __u32 __pad1; /* Was journal segment size in gfs1 */ | |
122 | ||
123 | struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */ | |
124 | struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */ | |
125 | struct gfs2_inum sb_root_dir; | |
126 | ||
127 | char sb_lockproto[GFS2_LOCKNAME_LEN]; | |
128 | char sb_locktable[GFS2_LOCKNAME_LEN]; | |
6d80c39f SW |
129 | |
130 | struct gfs2_inum __pad3; /* Was quota inode in gfs1 */ | |
131 | struct gfs2_inum __pad4; /* Was licence inode in gfs1 */ | |
132 | #define GFS2_HAS_UUID 1 | |
133 | __u8 sb_uuid[16]; /* The UUID, maybe 0 for backwards compat */ | |
b3b94faa DT |
134 | }; |
135 | ||
136 | /* | |
137 | * resource index structure | |
138 | */ | |
139 | ||
140 | struct gfs2_rindex { | |
141 | __be64 ri_addr; /* grp block disk address */ | |
142 | __be32 ri_length; /* length of rgrp header in fs blocks */ | |
143 | __u32 __pad; | |
144 | ||
145 | __be64 ri_data0; /* first data location */ | |
146 | __be32 ri_data; /* num of data blocks in rgrp */ | |
147 | ||
148 | __be32 ri_bitbytes; /* number of bytes in data bitmaps */ | |
149 | ||
150 | __u8 ri_reserved[64]; | |
151 | }; | |
152 | ||
153 | /* | |
154 | * resource group header structure | |
155 | */ | |
156 | ||
157 | /* Number of blocks per byte in rgrp */ | |
158 | #define GFS2_NBBY 4 | |
159 | #define GFS2_BIT_SIZE 2 | |
160 | #define GFS2_BIT_MASK 0x00000003 | |
161 | ||
162 | #define GFS2_BLKST_FREE 0 | |
163 | #define GFS2_BLKST_USED 1 | |
feaa7bba | 164 | #define GFS2_BLKST_UNLINKED 2 |
b3b94faa DT |
165 | #define GFS2_BLKST_DINODE 3 |
166 | ||
167 | #define GFS2_RGF_JOURNAL 0x00000001 | |
168 | #define GFS2_RGF_METAONLY 0x00000002 | |
169 | #define GFS2_RGF_DATAONLY 0x00000004 | |
170 | #define GFS2_RGF_NOALLOC 0x00000008 | |
66fc061b | 171 | #define GFS2_RGF_TRIMMED 0x00000010 |
b3b94faa DT |
172 | |
173 | struct gfs2_rgrp { | |
174 | struct gfs2_meta_header rg_header; | |
175 | ||
176 | __be32 rg_flags; | |
177 | __be32 rg_free; | |
178 | __be32 rg_dinodes; | |
4340fe62 SW |
179 | __be32 __pad; |
180 | __be64 rg_igeneration; | |
b3b94faa | 181 | |
4340fe62 | 182 | __u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */ |
b3b94faa DT |
183 | }; |
184 | ||
185 | /* | |
186 | * quota structure | |
187 | */ | |
188 | ||
189 | struct gfs2_quota { | |
190 | __be64 qu_limit; | |
191 | __be64 qu_warn; | |
192 | __be64 qu_value; | |
1ccaba30 | 193 | __u8 qu_reserved[64]; |
b3b94faa DT |
194 | }; |
195 | ||
196 | /* | |
197 | * dinode structure | |
198 | */ | |
199 | ||
200 | #define GFS2_MAX_META_HEIGHT 10 | |
201 | #define GFS2_DIR_MAX_DEPTH 17 | |
202 | ||
203 | #define DT2IF(dt) (((dt) << 12) & S_IFMT) | |
204 | #define IF2DT(sif) (((sif) & S_IFMT) >> 12) | |
205 | ||
7ea9ea83 SW |
206 | enum { |
207 | gfs2fl_Jdata = 0, | |
208 | gfs2fl_ExHash = 1, | |
209 | gfs2fl_Unused = 2, | |
210 | gfs2fl_EaIndirect = 3, | |
211 | gfs2fl_Directio = 4, | |
212 | gfs2fl_Immutable = 5, | |
213 | gfs2fl_AppendOnly = 6, | |
214 | gfs2fl_NoAtime = 7, | |
215 | gfs2fl_Sync = 8, | |
216 | gfs2fl_System = 9, | |
217 | gfs2fl_TruncInProg = 29, | |
218 | gfs2fl_InheritDirectio = 30, | |
219 | gfs2fl_InheritJdata = 31, | |
220 | }; | |
221 | ||
b3b94faa DT |
222 | /* Dinode flags */ |
223 | #define GFS2_DIF_JDATA 0x00000001 | |
224 | #define GFS2_DIF_EXHASH 0x00000002 | |
225 | #define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */ | |
226 | #define GFS2_DIF_EA_INDIRECT 0x00000008 | |
227 | #define GFS2_DIF_DIRECTIO 0x00000010 | |
228 | #define GFS2_DIF_IMMUTABLE 0x00000020 | |
229 | #define GFS2_DIF_APPENDONLY 0x00000040 | |
230 | #define GFS2_DIF_NOATIME 0x00000080 | |
231 | #define GFS2_DIF_SYNC 0x00000100 | |
232 | #define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */ | |
233 | #define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */ | |
234 | #define GFS2_DIF_INHERIT_DIRECTIO 0x40000000 | |
235 | #define GFS2_DIF_INHERIT_JDATA 0x80000000 | |
236 | ||
237 | struct gfs2_dinode { | |
238 | struct gfs2_meta_header di_header; | |
239 | ||
240 | struct gfs2_inum di_num; | |
241 | ||
242 | __be32 di_mode; /* mode of file */ | |
243 | __be32 di_uid; /* owner's user id */ | |
244 | __be32 di_gid; /* owner's group id */ | |
245 | __be32 di_nlink; /* number of links to this file */ | |
246 | __be64 di_size; /* number of bytes in file */ | |
247 | __be64 di_blocks; /* number of blocks in file */ | |
248 | __be64 di_atime; /* time last accessed */ | |
249 | __be64 di_mtime; /* time last modified */ | |
250 | __be64 di_ctime; /* time last changed */ | |
251 | __be32 di_major; /* device major number */ | |
252 | __be32 di_minor; /* device minor number */ | |
253 | ||
254 | /* This section varies from gfs1. Padding added to align with | |
255 | * remainder of dinode | |
256 | */ | |
257 | __be64 di_goal_meta; /* rgrp to alloc from next */ | |
258 | __be64 di_goal_data; /* data block goal */ | |
4340fe62 | 259 | __be64 di_generation; /* generation number for NFS */ |
b3b94faa DT |
260 | |
261 | __be32 di_flags; /* GFS2_DIF_... */ | |
262 | __be32 di_payload_format; /* GFS2_FORMAT_... */ | |
263 | __u16 __pad1; /* Was ditype in gfs1 */ | |
264 | __be16 di_height; /* height of metadata */ | |
265 | __u32 __pad2; /* Unused incarnation number from gfs1 */ | |
266 | ||
267 | /* These only apply to directories */ | |
268 | __u16 __pad3; /* Padding */ | |
269 | __be16 di_depth; /* Number of bits in the table */ | |
270 | __be32 di_entries; /* The number of entries in the directory */ | |
271 | ||
272 | struct gfs2_inum __pad4; /* Unused even in current gfs1 */ | |
273 | ||
274 | __be64 di_eattr; /* extended attribute block number */ | |
4bd91ba1 SW |
275 | __be32 di_atime_nsec; /* nsec portion of atime */ |
276 | __be32 di_mtime_nsec; /* nsec portion of mtime */ | |
277 | __be32 di_ctime_nsec; /* nsec portion of ctime */ | |
b3b94faa | 278 | |
4bd91ba1 | 279 | __u8 di_reserved[44]; |
b3b94faa DT |
280 | }; |
281 | ||
282 | /* | |
283 | * directory structure - many of these per directory file | |
284 | */ | |
285 | ||
286 | #define GFS2_FNAMESIZE 255 | |
287 | #define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7) | |
288 | ||
289 | struct gfs2_dirent { | |
290 | struct gfs2_inum de_inum; | |
291 | __be32 de_hash; | |
fc69d0d3 SW |
292 | __be16 de_rec_len; |
293 | __be16 de_name_len; | |
294 | __be16 de_type; | |
295 | __u8 __pad[14]; | |
b3b94faa DT |
296 | }; |
297 | ||
298 | /* | |
299 | * Header of leaf directory nodes | |
300 | */ | |
301 | ||
302 | struct gfs2_leaf { | |
303 | struct gfs2_meta_header lf_header; | |
304 | ||
305 | __be16 lf_depth; /* Depth of leaf */ | |
306 | __be16 lf_entries; /* Number of dirents in leaf */ | |
307 | __be32 lf_dirent_format; /* Format of the dirents */ | |
308 | __be64 lf_next; /* Next leaf, if overflow */ | |
309 | ||
fc69d0d3 | 310 | __u8 lf_reserved[64]; |
b3b94faa DT |
311 | }; |
312 | ||
313 | /* | |
314 | * Extended attribute header format | |
b6ed2e03 SW |
315 | * |
316 | * This works in a similar way to dirents. There is a fixed size header | |
317 | * followed by a variable length section made up of the name and the | |
318 | * associated data. In the case of a "stuffed" entry, the value is | |
319 | * inline directly after the name, the ea_num_ptrs entry will be | |
320 | * zero in that case. For non-"stuffed" entries, there will be | |
321 | * a set of pointers (aligned to 8 byte boundary) to the block(s) | |
322 | * containing the value. | |
323 | * | |
324 | * The blocks containing the values and the blocks containing the | |
325 | * extended attribute headers themselves all start with the common | |
326 | * metadata header. Each inode, if it has extended attributes, will | |
327 | * have either a single block containing the extended attribute headers | |
328 | * or a single indirect block pointing to blocks containing the | |
329 | * extended attribure headers. | |
330 | * | |
331 | * The maximim size of the data part of an extended attribute is 64k | |
332 | * so the number of blocks required depends upon block size. Since the | |
333 | * block size also determines the number of pointers in an indirect | |
334 | * block, its a fairly complicated calculation to work out the maximum | |
335 | * number of blocks that an inode may have relating to extended attributes. | |
336 | * | |
b3b94faa DT |
337 | */ |
338 | ||
339 | #define GFS2_EA_MAX_NAME_LEN 255 | |
340 | #define GFS2_EA_MAX_DATA_LEN 65536 | |
341 | ||
342 | #define GFS2_EATYPE_UNUSED 0 | |
343 | #define GFS2_EATYPE_USR 1 | |
344 | #define GFS2_EATYPE_SYS 2 | |
639b6d79 | 345 | #define GFS2_EATYPE_SECURITY 3 |
b3b94faa | 346 | |
639b6d79 | 347 | #define GFS2_EATYPE_LAST 3 |
b3b94faa DT |
348 | #define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST) |
349 | ||
350 | #define GFS2_EAFLAG_LAST 0x01 /* last ea in block */ | |
351 | ||
352 | struct gfs2_ea_header { | |
353 | __be32 ea_rec_len; | |
354 | __be32 ea_data_len; | |
355 | __u8 ea_name_len; /* no NULL pointer after the string */ | |
356 | __u8 ea_type; /* GFS2_EATYPE_... */ | |
357 | __u8 ea_flags; /* GFS2_EAFLAG_... */ | |
358 | __u8 ea_num_ptrs; | |
359 | __u32 __pad; | |
360 | }; | |
361 | ||
362 | /* | |
363 | * Log header structure | |
364 | */ | |
365 | ||
366 | #define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */ | |
367 | ||
368 | struct gfs2_log_header { | |
369 | struct gfs2_meta_header lh_header; | |
370 | ||
371 | __be64 lh_sequence; /* Sequence number of this transaction */ | |
372 | __be32 lh_flags; /* GFS2_LOG_HEAD_... */ | |
373 | __be32 lh_tail; /* Block number of log tail */ | |
374 | __be32 lh_blkno; | |
375 | __be32 lh_hash; | |
376 | }; | |
377 | ||
378 | /* | |
379 | * Log type descriptor | |
380 | */ | |
381 | ||
382 | #define GFS2_LOG_DESC_METADATA 300 | |
383 | /* ld_data1 is the number of metadata blocks in the descriptor. | |
384 | ld_data2 is unused. */ | |
385 | ||
386 | #define GFS2_LOG_DESC_REVOKE 301 | |
387 | /* ld_data1 is the number of revoke blocks in the descriptor. | |
388 | ld_data2 is unused. */ | |
389 | ||
18ec7d5c SW |
390 | #define GFS2_LOG_DESC_JDATA 302 |
391 | /* ld_data1 is the number of data blocks in the descriptor. | |
392 | ld_data2 is unused. */ | |
393 | ||
b3b94faa DT |
394 | struct gfs2_log_descriptor { |
395 | struct gfs2_meta_header ld_header; | |
396 | ||
397 | __be32 ld_type; /* GFS2_LOG_DESC_... */ | |
398 | __be32 ld_length; /* Number of buffers in this chunk */ | |
399 | __be32 ld_data1; /* descriptor-specific field */ | |
400 | __be32 ld_data2; /* descriptor-specific field */ | |
401 | ||
402 | __u8 ld_reserved[32]; | |
403 | }; | |
404 | ||
405 | /* | |
406 | * Inum Range | |
407 | * Describe a range of formal inode numbers allocated to | |
408 | * one machine to assign to inodes. | |
409 | */ | |
410 | ||
411 | #define GFS2_INUM_QUANTUM 1048576 | |
412 | ||
413 | struct gfs2_inum_range { | |
414 | __be64 ir_start; | |
415 | __be64 ir_length; | |
416 | }; | |
417 | ||
418 | /* | |
419 | * Statfs change | |
420 | * Describes an change to the pool of free and allocated | |
421 | * blocks. | |
422 | */ | |
423 | ||
424 | struct gfs2_statfs_change { | |
425 | __be64 sc_total; | |
426 | __be64 sc_free; | |
427 | __be64 sc_dinodes; | |
428 | }; | |
429 | ||
b3b94faa DT |
430 | /* |
431 | * Quota change | |
432 | * Describes an allocation change for a particular | |
433 | * user or group. | |
434 | */ | |
435 | ||
436 | #define GFS2_QCF_USER 0x00000001 | |
437 | ||
438 | struct gfs2_quota_change { | |
439 | __be64 qc_change; | |
440 | __be32 qc_flags; /* GFS2_QCF_... */ | |
441 | __be32 qc_id; | |
442 | }; | |
443 | ||
2a87ab08 AD |
444 | struct gfs2_quota_lvb { |
445 | __be32 qb_magic; | |
518bbde3 | 446 | __u32 __pad; |
2a87ab08 AD |
447 | __be64 qb_limit; /* Hard limit of # blocks to alloc */ |
448 | __be64 qb_warn; /* Warn user when alloc is above this # */ | |
449 | __be64 qb_value; /* Current # blocks allocated */ | |
450 | }; | |
451 | ||
b3b94faa | 452 | #endif /* __GFS2_ONDISK_DOT_H__ */ |