2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
3 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
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.
10 #ifndef __GFS2_ONDISK_DOT_H__
11 #define __GFS2_ONDISK_DOT_H__
13 #define GFS2_MAGIC 0x01161970
14 #define GFS2_BASIC_BLOCK 512
15 #define GFS2_BASIC_BLOCK_SHIFT 9
17 /* Lock numbers of the LM_TYPE_NONDISK type */
19 #define GFS2_MOUNT_LOCK 0
20 #define GFS2_LIVE_LOCK 1
21 #define GFS2_TRANS_LOCK 2
22 #define GFS2_RENAME_LOCK 3
24 /* Format numbers for various metadata types */
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 1600
38 #define GFS2_FORMAT_ED 1700
39 #define GFS2_FORMAT_QC 1400
40 /* These are format numbers for entities contained in files */
41 #define GFS2_FORMAT_RI 1100
42 #define GFS2_FORMAT_DE 1200
43 #define GFS2_FORMAT_QU 1500
44 /* These are part of the superblock */
45 #define GFS2_FORMAT_FS 1801
46 #define GFS2_FORMAT_MULTI 1900
49 * An on-disk inode number
57 static inline int gfs2_inum_equal(const struct gfs2_inum *ino1,
58 const struct gfs2_inum *ino2)
60 return ino1->no_formal_ino == ino2->no_formal_ino &&
61 ino1->no_addr == ino2->no_addr;
65 * Generic metadata head structure
66 * Every inplace buffer logged in the journal must start with this.
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
79 #define GFS2_METATYPE_LB 12
80 #define GFS2_METATYPE_EA 10
81 #define GFS2_METATYPE_ED 11
82 #define GFS2_METATYPE_QC 14
84 struct gfs2_meta_header {
87 __be64 __pad0; /* Was generation number in gfs1 */
89 __be32 __pad1; /* Was incarnation number in gfs1 */
93 * super-block structure
95 * It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes)
97 * Order is important, need to be able to read old superblocks to do on-disk
101 /* Address of superblock in GFS2 basic blocks */
102 #define GFS2_SB_ADDR 128
104 /* The lock number for the superblock (must be zero) */
105 #define GFS2_SB_LOCK 0
107 /* Requirement: GFS2_LOCKNAME_LEN % 8 == 0
108 Includes: the fencing zero at the end */
109 #define GFS2_LOCKNAME_LEN 64
112 struct gfs2_meta_header sb_header;
115 __be32 sb_multihost_format;
116 __u32 __pad0; /* Was superblock flags in gfs1 */
119 __be32 sb_bsize_shift;
120 __u32 __pad1; /* Was journal segment size in gfs1 */
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;
126 char sb_lockproto[GFS2_LOCKNAME_LEN];
127 char sb_locktable[GFS2_LOCKNAME_LEN];
128 /* In gfs1, quota and license dinodes followed */
132 * resource index structure
136 __be64 ri_addr; /* grp block disk address */
137 __be32 ri_length; /* length of rgrp header in fs blocks */
140 __be64 ri_data0; /* first data location */
141 __be32 ri_data; /* num of data blocks in rgrp */
143 __be32 ri_bitbytes; /* number of bytes in data bitmaps */
145 __u8 ri_reserved[64];
149 * resource group header structure
152 /* Number of blocks per byte in rgrp */
154 #define GFS2_BIT_SIZE 2
155 #define GFS2_BIT_MASK 0x00000003
157 #define GFS2_BLKST_FREE 0
158 #define GFS2_BLKST_USED 1
159 #define GFS2_BLKST_UNLINKED 2
160 #define GFS2_BLKST_DINODE 3
162 #define GFS2_RGF_JOURNAL 0x00000001
163 #define GFS2_RGF_METAONLY 0x00000002
164 #define GFS2_RGF_DATAONLY 0x00000004
165 #define GFS2_RGF_NOALLOC 0x00000008
168 struct gfs2_meta_header rg_header;
174 __be64 rg_igeneration;
176 __u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */
187 __u8 qu_reserved[64];
194 #define GFS2_MAX_META_HEIGHT 10
195 #define GFS2_DIR_MAX_DEPTH 17
197 #define DT2IF(dt) (((dt) << 12) & S_IFMT)
198 #define IF2DT(sif) (((sif) & S_IFMT) >> 12)
204 gfs2fl_EaIndirect = 3,
206 gfs2fl_Immutable = 5,
207 gfs2fl_AppendOnly = 6,
211 gfs2fl_TruncInProg = 29,
212 gfs2fl_InheritDirectio = 30,
213 gfs2fl_InheritJdata = 31,
217 #define GFS2_DIF_JDATA 0x00000001
218 #define GFS2_DIF_EXHASH 0x00000002
219 #define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
220 #define GFS2_DIF_EA_INDIRECT 0x00000008
221 #define GFS2_DIF_DIRECTIO 0x00000010
222 #define GFS2_DIF_IMMUTABLE 0x00000020
223 #define GFS2_DIF_APPENDONLY 0x00000040
224 #define GFS2_DIF_NOATIME 0x00000080
225 #define GFS2_DIF_SYNC 0x00000100
226 #define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
227 #define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
228 #define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
229 #define GFS2_DIF_INHERIT_JDATA 0x80000000
232 struct gfs2_meta_header di_header;
234 struct gfs2_inum di_num;
236 __be32 di_mode; /* mode of file */
237 __be32 di_uid; /* owner's user id */
238 __be32 di_gid; /* owner's group id */
239 __be32 di_nlink; /* number of links to this file */
240 __be64 di_size; /* number of bytes in file */
241 __be64 di_blocks; /* number of blocks in file */
242 __be64 di_atime; /* time last accessed */
243 __be64 di_mtime; /* time last modified */
244 __be64 di_ctime; /* time last changed */
245 __be32 di_major; /* device major number */
246 __be32 di_minor; /* device minor number */
248 /* This section varies from gfs1. Padding added to align with
249 * remainder of dinode
251 __be64 di_goal_meta; /* rgrp to alloc from next */
252 __be64 di_goal_data; /* data block goal */
253 __be64 di_generation; /* generation number for NFS */
255 __be32 di_flags; /* GFS2_DIF_... */
256 __be32 di_payload_format; /* GFS2_FORMAT_... */
257 __u16 __pad1; /* Was ditype in gfs1 */
258 __be16 di_height; /* height of metadata */
259 __u32 __pad2; /* Unused incarnation number from gfs1 */
261 /* These only apply to directories */
262 __u16 __pad3; /* Padding */
263 __be16 di_depth; /* Number of bits in the table */
264 __be32 di_entries; /* The number of entries in the directory */
266 struct gfs2_inum __pad4; /* Unused even in current gfs1 */
268 __be64 di_eattr; /* extended attribute block number */
270 __u8 di_reserved[56];
274 * directory structure - many of these per directory file
277 #define GFS2_FNAMESIZE 255
278 #define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)
281 struct gfs2_inum de_inum;
290 * Header of leaf directory nodes
294 struct gfs2_meta_header lf_header;
296 __be16 lf_depth; /* Depth of leaf */
297 __be16 lf_entries; /* Number of dirents in leaf */
298 __be32 lf_dirent_format; /* Format of the dirents */
299 __be64 lf_next; /* Next leaf, if overflow */
301 __u8 lf_reserved[64];
305 * Extended attribute header format
308 #define GFS2_EA_MAX_NAME_LEN 255
309 #define GFS2_EA_MAX_DATA_LEN 65536
311 #define GFS2_EATYPE_UNUSED 0
312 #define GFS2_EATYPE_USR 1
313 #define GFS2_EATYPE_SYS 2
314 #define GFS2_EATYPE_SECURITY 3
316 #define GFS2_EATYPE_LAST 3
317 #define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)
319 #define GFS2_EAFLAG_LAST 0x01 /* last ea in block */
321 struct gfs2_ea_header {
324 __u8 ea_name_len; /* no NULL pointer after the string */
325 __u8 ea_type; /* GFS2_EATYPE_... */
326 __u8 ea_flags; /* GFS2_EAFLAG_... */
332 * Log header structure
335 #define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */
337 struct gfs2_log_header {
338 struct gfs2_meta_header lh_header;
340 __be64 lh_sequence; /* Sequence number of this transaction */
341 __be32 lh_flags; /* GFS2_LOG_HEAD_... */
342 __be32 lh_tail; /* Block number of log tail */
348 * Log type descriptor
351 #define GFS2_LOG_DESC_METADATA 300
352 /* ld_data1 is the number of metadata blocks in the descriptor.
353 ld_data2 is unused. */
355 #define GFS2_LOG_DESC_REVOKE 301
356 /* ld_data1 is the number of revoke blocks in the descriptor.
357 ld_data2 is unused. */
359 #define GFS2_LOG_DESC_JDATA 302
360 /* ld_data1 is the number of data blocks in the descriptor.
361 ld_data2 is unused. */
363 struct gfs2_log_descriptor {
364 struct gfs2_meta_header ld_header;
366 __be32 ld_type; /* GFS2_LOG_DESC_... */
367 __be32 ld_length; /* Number of buffers in this chunk */
368 __be32 ld_data1; /* descriptor-specific field */
369 __be32 ld_data2; /* descriptor-specific field */
371 __u8 ld_reserved[32];
376 * Describe a range of formal inode numbers allocated to
377 * one machine to assign to inodes.
380 #define GFS2_INUM_QUANTUM 1048576
382 struct gfs2_inum_range {
389 * Describes an change to the pool of free and allocated
393 struct gfs2_statfs_change {
401 * Describes an allocation change for a particular
405 #define GFS2_QCF_USER 0x00000001
407 struct gfs2_quota_change {
409 __be32 qc_flags; /* GFS2_QCF_... */
414 /* Translation functions */
416 extern void gfs2_inum_in(struct gfs2_inum *no, const void *buf);
417 extern void gfs2_inum_out(const struct gfs2_inum *no, void *buf);
418 extern void gfs2_sb_in(struct gfs2_sb *sb, const void *buf);
419 extern void gfs2_rindex_in(struct gfs2_rindex *ri, const void *buf);
420 extern void gfs2_rindex_out(const struct gfs2_rindex *ri, void *buf);
421 extern void gfs2_rgrp_in(struct gfs2_rgrp *rg, const void *buf);
422 extern void gfs2_rgrp_out(const struct gfs2_rgrp *rg, void *buf);
423 extern void gfs2_quota_in(struct gfs2_quota *qu, const void *buf);
424 extern void gfs2_quota_out(const struct gfs2_quota *qu, void *buf);
425 extern void gfs2_dinode_in(struct gfs2_dinode *di, const void *buf);
426 extern void gfs2_dinode_out(const struct gfs2_dinode *di, void *buf);
427 extern void gfs2_ea_header_in(struct gfs2_ea_header *ea, const void *buf);
428 extern void gfs2_ea_header_out(const struct gfs2_ea_header *ea, void *buf);
429 extern void gfs2_log_header_in(struct gfs2_log_header *lh, const void *buf);
430 extern void gfs2_inum_range_in(struct gfs2_inum_range *ir, const void *buf);
431 extern void gfs2_inum_range_out(const struct gfs2_inum_range *ir, void *buf);
432 extern void gfs2_statfs_change_in(struct gfs2_statfs_change *sc, const void *buf);
433 extern void gfs2_statfs_change_out(const struct gfs2_statfs_change *sc, void *buf);
434 extern void gfs2_quota_change_in(struct gfs2_quota_change *qc, const void *buf);
436 /* Printing functions */
438 extern void gfs2_rindex_print(const struct gfs2_rindex *ri);
439 extern void gfs2_dinode_print(const struct gfs2_dinode *di);
441 #endif /* __KERNEL__ */
443 #endif /* __GFS2_ONDISK_DOT_H__ */