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 struct gfs2_inum_host {
62 static inline int gfs2_inum_equal(const struct gfs2_inum_host *ino1,
63 const struct gfs2_inum_host *ino2)
65 return ino1->no_formal_ino == ino2->no_formal_ino &&
66 ino1->no_addr == ino2->no_addr;
70 * Generic metadata head structure
71 * Every inplace buffer logged in the journal must start with this.
74 #define GFS2_METATYPE_NONE 0
75 #define GFS2_METATYPE_SB 1
76 #define GFS2_METATYPE_RG 2
77 #define GFS2_METATYPE_RB 3
78 #define GFS2_METATYPE_DI 4
79 #define GFS2_METATYPE_IN 5
80 #define GFS2_METATYPE_LF 6
81 #define GFS2_METATYPE_JD 7
82 #define GFS2_METATYPE_LH 8
83 #define GFS2_METATYPE_LD 9
84 #define GFS2_METATYPE_LB 12
85 #define GFS2_METATYPE_EA 10
86 #define GFS2_METATYPE_ED 11
87 #define GFS2_METATYPE_QC 14
89 struct gfs2_meta_header {
92 __be64 __pad0; /* Was generation number in gfs1 */
94 __be32 __pad1; /* Was incarnation number in gfs1 */
97 struct gfs2_meta_header_host {
104 * super-block structure
106 * It's probably good if SIZEOF_SB <= GFS2_BASIC_BLOCK (512 bytes)
108 * Order is important, need to be able to read old superblocks to do on-disk
112 /* Address of superblock in GFS2 basic blocks */
113 #define GFS2_SB_ADDR 128
115 /* The lock number for the superblock (must be zero) */
116 #define GFS2_SB_LOCK 0
118 /* Requirement: GFS2_LOCKNAME_LEN % 8 == 0
119 Includes: the fencing zero at the end */
120 #define GFS2_LOCKNAME_LEN 64
123 struct gfs2_meta_header sb_header;
126 __be32 sb_multihost_format;
127 __u32 __pad0; /* Was superblock flags in gfs1 */
130 __be32 sb_bsize_shift;
131 __u32 __pad1; /* Was journal segment size in gfs1 */
133 struct gfs2_inum sb_master_dir; /* Was jindex dinode in gfs1 */
134 struct gfs2_inum __pad2; /* Was rindex dinode in gfs1 */
135 struct gfs2_inum sb_root_dir;
137 char sb_lockproto[GFS2_LOCKNAME_LEN];
138 char sb_locktable[GFS2_LOCKNAME_LEN];
139 /* In gfs1, quota and license dinodes followed */
142 struct gfs2_sb_host {
143 struct gfs2_meta_header_host sb_header;
146 __u32 sb_multihost_format;
149 __u32 sb_bsize_shift;
151 struct gfs2_inum_host sb_master_dir; /* Was jindex dinode in gfs1 */
152 struct gfs2_inum_host sb_root_dir;
154 char sb_lockproto[GFS2_LOCKNAME_LEN];
155 char sb_locktable[GFS2_LOCKNAME_LEN];
156 /* In gfs1, quota and license dinodes followed */
160 * resource index structure
164 __be64 ri_addr; /* grp block disk address */
165 __be32 ri_length; /* length of rgrp header in fs blocks */
168 __be64 ri_data0; /* first data location */
169 __be32 ri_data; /* num of data blocks in rgrp */
171 __be32 ri_bitbytes; /* number of bytes in data bitmaps */
173 __u8 ri_reserved[64];
176 struct gfs2_rindex_host {
177 __u64 ri_addr; /* grp block disk address */
178 __u64 ri_data0; /* first data location */
179 __u32 ri_length; /* length of rgrp header in fs blocks */
180 __u32 ri_data; /* num of data blocks in rgrp */
181 __u32 ri_bitbytes; /* number of bytes in data bitmaps */
185 * resource group header structure
188 /* Number of blocks per byte in rgrp */
190 #define GFS2_BIT_SIZE 2
191 #define GFS2_BIT_MASK 0x00000003
193 #define GFS2_BLKST_FREE 0
194 #define GFS2_BLKST_USED 1
195 #define GFS2_BLKST_UNLINKED 2
196 #define GFS2_BLKST_DINODE 3
198 #define GFS2_RGF_JOURNAL 0x00000001
199 #define GFS2_RGF_METAONLY 0x00000002
200 #define GFS2_RGF_DATAONLY 0x00000004
201 #define GFS2_RGF_NOALLOC 0x00000008
204 struct gfs2_meta_header rg_header;
210 __be64 rg_igeneration;
212 __u8 rg_reserved[80]; /* Several fields from gfs1 now reserved */
215 struct gfs2_rgrp_host {
219 __u64 rg_igeneration;
230 __u8 qu_reserved[64];
233 struct gfs2_quota_host {
243 #define GFS2_MAX_META_HEIGHT 10
244 #define GFS2_DIR_MAX_DEPTH 17
246 #define DT2IF(dt) (((dt) << 12) & S_IFMT)
247 #define IF2DT(sif) (((sif) & S_IFMT) >> 12)
253 gfs2fl_EaIndirect = 3,
255 gfs2fl_Immutable = 5,
256 gfs2fl_AppendOnly = 6,
260 gfs2fl_TruncInProg = 29,
261 gfs2fl_InheritDirectio = 30,
262 gfs2fl_InheritJdata = 31,
266 #define GFS2_DIF_JDATA 0x00000001
267 #define GFS2_DIF_EXHASH 0x00000002
268 #define GFS2_DIF_UNUSED 0x00000004 /* only in gfs1 */
269 #define GFS2_DIF_EA_INDIRECT 0x00000008
270 #define GFS2_DIF_DIRECTIO 0x00000010
271 #define GFS2_DIF_IMMUTABLE 0x00000020
272 #define GFS2_DIF_APPENDONLY 0x00000040
273 #define GFS2_DIF_NOATIME 0x00000080
274 #define GFS2_DIF_SYNC 0x00000100
275 #define GFS2_DIF_SYSTEM 0x00000200 /* New in gfs2 */
276 #define GFS2_DIF_TRUNC_IN_PROG 0x20000000 /* New in gfs2 */
277 #define GFS2_DIF_INHERIT_DIRECTIO 0x40000000
278 #define GFS2_DIF_INHERIT_JDATA 0x80000000
281 struct gfs2_meta_header di_header;
283 struct gfs2_inum di_num;
285 __be32 di_mode; /* mode of file */
286 __be32 di_uid; /* owner's user id */
287 __be32 di_gid; /* owner's group id */
288 __be32 di_nlink; /* number of links to this file */
289 __be64 di_size; /* number of bytes in file */
290 __be64 di_blocks; /* number of blocks in file */
291 __be64 di_atime; /* time last accessed */
292 __be64 di_mtime; /* time last modified */
293 __be64 di_ctime; /* time last changed */
294 __be32 di_major; /* device major number */
295 __be32 di_minor; /* device minor number */
297 /* This section varies from gfs1. Padding added to align with
298 * remainder of dinode
300 __be64 di_goal_meta; /* rgrp to alloc from next */
301 __be64 di_goal_data; /* data block goal */
302 __be64 di_generation; /* generation number for NFS */
304 __be32 di_flags; /* GFS2_DIF_... */
305 __be32 di_payload_format; /* GFS2_FORMAT_... */
306 __u16 __pad1; /* Was ditype in gfs1 */
307 __be16 di_height; /* height of metadata */
308 __u32 __pad2; /* Unused incarnation number from gfs1 */
310 /* These only apply to directories */
311 __u16 __pad3; /* Padding */
312 __be16 di_depth; /* Number of bits in the table */
313 __be32 di_entries; /* The number of entries in the directory */
315 struct gfs2_inum __pad4; /* Unused even in current gfs1 */
317 __be64 di_eattr; /* extended attribute block number */
319 __u8 di_reserved[56];
322 struct gfs2_dinode_host {
323 __u64 di_size; /* number of bytes in file */
324 __u64 di_blocks; /* number of blocks in file */
326 /* This section varies from gfs1. Padding added to align with
327 * remainder of dinode
329 __u64 di_goal_meta; /* rgrp to alloc from next */
330 __u64 di_goal_data; /* data block goal */
331 __u64 di_generation; /* generation number for NFS */
333 __u32 di_flags; /* GFS2_DIF_... */
334 __u16 di_height; /* height of metadata */
336 /* These only apply to directories */
337 __u16 di_depth; /* Number of bits in the table */
338 __u32 di_entries; /* The number of entries in the directory */
340 __u64 di_eattr; /* extended attribute block number */
344 * directory structure - many of these per directory file
347 #define GFS2_FNAMESIZE 255
348 #define GFS2_DIRENT_SIZE(name_len) ((sizeof(struct gfs2_dirent) + (name_len) + 7) & ~7)
351 struct gfs2_inum de_inum;
360 * Header of leaf directory nodes
364 struct gfs2_meta_header lf_header;
366 __be16 lf_depth; /* Depth of leaf */
367 __be16 lf_entries; /* Number of dirents in leaf */
368 __be32 lf_dirent_format; /* Format of the dirents */
369 __be64 lf_next; /* Next leaf, if overflow */
371 __u8 lf_reserved[64];
375 * Extended attribute header format
378 #define GFS2_EA_MAX_NAME_LEN 255
379 #define GFS2_EA_MAX_DATA_LEN 65536
381 #define GFS2_EATYPE_UNUSED 0
382 #define GFS2_EATYPE_USR 1
383 #define GFS2_EATYPE_SYS 2
384 #define GFS2_EATYPE_SECURITY 3
386 #define GFS2_EATYPE_LAST 3
387 #define GFS2_EATYPE_VALID(x) ((x) <= GFS2_EATYPE_LAST)
389 #define GFS2_EAFLAG_LAST 0x01 /* last ea in block */
391 struct gfs2_ea_header {
394 __u8 ea_name_len; /* no NULL pointer after the string */
395 __u8 ea_type; /* GFS2_EATYPE_... */
396 __u8 ea_flags; /* GFS2_EAFLAG_... */
402 * Log header structure
405 #define GFS2_LOG_HEAD_UNMOUNT 0x00000001 /* log is clean */
407 struct gfs2_log_header {
408 struct gfs2_meta_header lh_header;
410 __be64 lh_sequence; /* Sequence number of this transaction */
411 __be32 lh_flags; /* GFS2_LOG_HEAD_... */
412 __be32 lh_tail; /* Block number of log tail */
417 struct gfs2_log_header_host {
418 struct gfs2_meta_header_host lh_header;
420 __u64 lh_sequence; /* Sequence number of this transaction */
421 __u32 lh_flags; /* GFS2_LOG_HEAD_... */
422 __u32 lh_tail; /* Block number of log tail */
428 * Log type descriptor
431 #define GFS2_LOG_DESC_METADATA 300
432 /* ld_data1 is the number of metadata blocks in the descriptor.
433 ld_data2 is unused. */
435 #define GFS2_LOG_DESC_REVOKE 301
436 /* ld_data1 is the number of revoke blocks in the descriptor.
437 ld_data2 is unused. */
439 #define GFS2_LOG_DESC_JDATA 302
440 /* ld_data1 is the number of data blocks in the descriptor.
441 ld_data2 is unused. */
443 struct gfs2_log_descriptor {
444 struct gfs2_meta_header ld_header;
446 __be32 ld_type; /* GFS2_LOG_DESC_... */
447 __be32 ld_length; /* Number of buffers in this chunk */
448 __be32 ld_data1; /* descriptor-specific field */
449 __be32 ld_data2; /* descriptor-specific field */
451 __u8 ld_reserved[32];
456 * Describe a range of formal inode numbers allocated to
457 * one machine to assign to inodes.
460 #define GFS2_INUM_QUANTUM 1048576
462 struct gfs2_inum_range {
467 struct gfs2_inum_range_host {
474 * Describes an change to the pool of free and allocated
478 struct gfs2_statfs_change {
484 struct gfs2_statfs_change_host {
492 * Describes an allocation change for a particular
496 #define GFS2_QCF_USER 0x00000001
498 struct gfs2_quota_change {
500 __be32 qc_flags; /* GFS2_QCF_... */
504 struct gfs2_quota_change_host {
506 __u32 qc_flags; /* GFS2_QCF_... */
511 /* Translation functions */
513 extern void gfs2_inum_in(struct gfs2_inum_host *no, const void *buf);
514 extern void gfs2_inum_out(const struct gfs2_inum_host *no, void *buf);
515 extern void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf);
516 extern void gfs2_rindex_in(struct gfs2_rindex_host *ri, const void *buf);
517 extern void gfs2_rindex_out(const struct gfs2_rindex_host *ri, void *buf);
518 extern void gfs2_rgrp_in(struct gfs2_rgrp_host *rg, const void *buf);
519 extern void gfs2_rgrp_out(const struct gfs2_rgrp_host *rg, void *buf);
520 extern void gfs2_quota_in(struct gfs2_quota_host *qu, const void *buf);
522 extern void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf);
523 extern void gfs2_ea_header_in(struct gfs2_ea_header *ea, const void *buf);
524 extern void gfs2_ea_header_out(const struct gfs2_ea_header *ea, void *buf);
525 extern void gfs2_log_header_in(struct gfs2_log_header_host *lh, const void *buf);
526 extern void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf);
527 extern void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf);
528 extern void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf);
529 extern void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf);
530 extern void gfs2_quota_change_in(struct gfs2_quota_change_host *qc, const void *buf);
532 /* Printing functions */
534 extern void gfs2_rindex_print(const struct gfs2_rindex_host *ri);
535 extern void gfs2_dinode_print(const struct gfs2_inode *ip);
537 #endif /* __KERNEL__ */
539 #endif /* __GFS2_ONDISK_DOT_H__ */