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__ */