Contents of /trunk/mkinitrd-magellan/busybox/e2fsprogs/old_e2fsprogs/ext2fs/ext2_fs.h
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
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Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 18180 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
1 | /* vi: set sw=4 ts=4: */ |
2 | /* |
3 | * linux/include/linux/ext2_fs.h |
4 | * |
5 | * Copyright (C) 1992, 1993, 1994, 1995 |
6 | * Remy Card (card@masi.ibp.fr) |
7 | * Laboratoire MASI - Institut Blaise Pascal |
8 | * Universite Pierre et Marie Curie (Paris VI) |
9 | * |
10 | * from |
11 | * |
12 | * linux/include/linux/minix_fs.h |
13 | * |
14 | * Copyright (C) 1991, 1992 Linus Torvalds |
15 | */ |
16 | #ifndef LINUX_EXT2_FS_H |
17 | #define LINUX_EXT2_FS_H 1 |
18 | |
19 | #include "ext2_types.h" /* Changed from linux/types.h */ |
20 | |
21 | /* |
22 | * Special inode numbers |
23 | */ |
24 | #define EXT2_BAD_INO 1 /* Bad blocks inode */ |
25 | #define EXT2_ROOT_INO 2 /* Root inode */ |
26 | #define EXT2_ACL_IDX_INO 3 /* ACL inode */ |
27 | #define EXT2_ACL_DATA_INO 4 /* ACL inode */ |
28 | #define EXT2_BOOT_LOADER_INO 5 /* Boot loader inode */ |
29 | #define EXT2_UNDEL_DIR_INO 6 /* Undelete directory inode */ |
30 | #define EXT2_RESIZE_INO 7 /* Reserved group descriptors inode */ |
31 | #define EXT2_JOURNAL_INO 8 /* Journal inode */ |
32 | |
33 | /* First non-reserved inode for old ext2 filesystems */ |
34 | #define EXT2_GOOD_OLD_FIRST_INO 11 |
35 | |
36 | /* |
37 | * The second extended file system magic number |
38 | */ |
39 | #define EXT2_SUPER_MAGIC 0xEF53 |
40 | |
41 | /* Assume that user mode programs are passing in an ext2fs superblock, not |
42 | * a kernel struct super_block. This will allow us to call the feature-test |
43 | * macros from user land. */ |
44 | #define EXT2_SB(sb) (sb) |
45 | |
46 | /* |
47 | * Maximal count of links to a file |
48 | */ |
49 | #define EXT2_LINK_MAX 32000 |
50 | |
51 | /* |
52 | * Macro-instructions used to manage several block sizes |
53 | */ |
54 | #define EXT2_MIN_BLOCK_LOG_SIZE 10 /* 1024 */ |
55 | #define EXT2_MAX_BLOCK_LOG_SIZE 16 /* 65536 */ |
56 | #define EXT2_MIN_BLOCK_SIZE (1 << EXT2_MIN_BLOCK_LOG_SIZE) |
57 | #define EXT2_MAX_BLOCK_SIZE (1 << EXT2_MAX_BLOCK_LOG_SIZE) |
58 | #define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size) |
59 | #define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10) |
60 | #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ |
61 | EXT2_GOOD_OLD_INODE_SIZE : (s)->s_inode_size) |
62 | #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \ |
63 | EXT2_GOOD_OLD_FIRST_INO : (s)->s_first_ino) |
64 | #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof(__u32)) |
65 | |
66 | /* |
67 | * Macro-instructions used to manage fragments |
68 | */ |
69 | #define EXT2_MIN_FRAG_SIZE EXT2_MIN_BLOCK_SIZE |
70 | #define EXT2_MAX_FRAG_SIZE EXT2_MAX_BLOCK_SIZE |
71 | #define EXT2_MIN_FRAG_LOG_SIZE EXT2_MIN_BLOCK_LOG_SIZE |
72 | # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size) |
73 | # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s)) |
74 | |
75 | /* |
76 | * ACL structures |
77 | */ |
78 | struct ext2_acl_header /* Header of Access Control Lists */ |
79 | { |
80 | __u32 aclh_size; |
81 | __u32 aclh_file_count; |
82 | __u32 aclh_acle_count; |
83 | __u32 aclh_first_acle; |
84 | }; |
85 | |
86 | struct ext2_acl_entry /* Access Control List Entry */ |
87 | { |
88 | __u32 acle_size; |
89 | __u16 acle_perms; /* Access permissions */ |
90 | __u16 acle_type; /* Type of entry */ |
91 | __u16 acle_tag; /* User or group identity */ |
92 | __u16 acle_pad1; |
93 | __u32 acle_next; /* Pointer on next entry for the */ |
94 | /* same inode or on next free entry */ |
95 | }; |
96 | |
97 | /* |
98 | * Structure of a blocks group descriptor |
99 | */ |
100 | struct ext2_group_desc |
101 | { |
102 | __u32 bg_block_bitmap; /* Blocks bitmap block */ |
103 | __u32 bg_inode_bitmap; /* Inodes bitmap block */ |
104 | __u32 bg_inode_table; /* Inodes table block */ |
105 | __u16 bg_free_blocks_count; /* Free blocks count */ |
106 | __u16 bg_free_inodes_count; /* Free inodes count */ |
107 | __u16 bg_used_dirs_count; /* Directories count */ |
108 | __u16 bg_pad; |
109 | __u32 bg_reserved[3]; |
110 | }; |
111 | |
112 | /* |
113 | * Data structures used by the directory indexing feature |
114 | * |
115 | * Note: all of the multibyte integer fields are little endian. |
116 | */ |
117 | |
118 | /* |
119 | * Note: dx_root_info is laid out so that if it should somehow get |
120 | * overlaid by a dirent the two low bits of the hash version will be |
121 | * zero. Therefore, the hash version mod 4 should never be 0. |
122 | * Sincerely, the paranoia department. |
123 | */ |
124 | struct ext2_dx_root_info { |
125 | __u32 reserved_zero; |
126 | __u8 hash_version; /* 0 now, 1 at release */ |
127 | __u8 info_length; /* 8 */ |
128 | __u8 indirect_levels; |
129 | __u8 unused_flags; |
130 | }; |
131 | |
132 | #define EXT2_HASH_LEGACY 0 |
133 | #define EXT2_HASH_HALF_MD4 1 |
134 | #define EXT2_HASH_TEA 2 |
135 | |
136 | #define EXT2_HASH_FLAG_INCOMPAT 0x1 |
137 | |
138 | struct ext2_dx_entry { |
139 | __u32 hash; |
140 | __u32 block; |
141 | }; |
142 | |
143 | struct ext2_dx_countlimit { |
144 | __u16 limit; |
145 | __u16 count; |
146 | }; |
147 | |
148 | |
149 | /* |
150 | * Macro-instructions used to manage group descriptors |
151 | */ |
152 | #define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group) |
153 | #define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group) |
154 | #define EXT2_INODES_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s)/EXT2_INODE_SIZE(s)) |
155 | /* limits imposed by 16-bit value gd_free_{blocks,inode}_count */ |
156 | #define EXT2_MAX_BLOCKS_PER_GROUP(s) ((1 << 16) - 8) |
157 | #define EXT2_MAX_INODES_PER_GROUP(s) ((1 << 16) - EXT2_INODES_PER_BLOCK(s)) |
158 | #define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc)) |
159 | |
160 | /* |
161 | * Constants relative to the data blocks |
162 | */ |
163 | #define EXT2_NDIR_BLOCKS 12 |
164 | #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS |
165 | #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1) |
166 | #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1) |
167 | #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1) |
168 | |
169 | /* |
170 | * Inode flags |
171 | */ |
172 | #define EXT2_SECRM_FL 0x00000001 /* Secure deletion */ |
173 | #define EXT2_UNRM_FL 0x00000002 /* Undelete */ |
174 | #define EXT2_COMPR_FL 0x00000004 /* Compress file */ |
175 | #define EXT2_SYNC_FL 0x00000008 /* Synchronous updates */ |
176 | #define EXT2_IMMUTABLE_FL 0x00000010 /* Immutable file */ |
177 | #define EXT2_APPEND_FL 0x00000020 /* writes to file may only append */ |
178 | #define EXT2_NODUMP_FL 0x00000040 /* do not dump file */ |
179 | #define EXT2_NOATIME_FL 0x00000080 /* do not update atime */ |
180 | /* Reserved for compression usage... */ |
181 | #define EXT2_DIRTY_FL 0x00000100 |
182 | #define EXT2_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */ |
183 | #define EXT2_NOCOMPR_FL 0x00000400 /* Access raw compressed data */ |
184 | #define EXT2_ECOMPR_FL 0x00000800 /* Compression error */ |
185 | /* End compression flags --- maybe not all used */ |
186 | #define EXT2_BTREE_FL 0x00001000 /* btree format dir */ |
187 | #define EXT2_INDEX_FL 0x00001000 /* hash-indexed directory */ |
188 | #define EXT2_IMAGIC_FL 0x00002000 |
189 | #define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */ |
190 | #define EXT2_NOTAIL_FL 0x00008000 /* file tail should not be merged */ |
191 | #define EXT2_DIRSYNC_FL 0x00010000 /* Synchronous directory modifications */ |
192 | #define EXT2_TOPDIR_FL 0x00020000 /* Top of directory hierarchies*/ |
193 | #define EXT3_EXTENTS_FL 0x00080000 /* Inode uses extents */ |
194 | #define EXT2_RESERVED_FL 0x80000000 /* reserved for ext2 lib */ |
195 | |
196 | #define EXT2_FL_USER_VISIBLE 0x0003DFFF /* User visible flags */ |
197 | #define EXT2_FL_USER_MODIFIABLE 0x000080FF /* User modifiable flags */ |
198 | |
199 | /* |
200 | * ioctl commands |
201 | */ |
202 | #define EXT2_IOC_GETFLAGS _IOR('f', 1, long) |
203 | #define EXT2_IOC_SETFLAGS _IOW('f', 2, long) |
204 | #define EXT2_IOC_GETVERSION _IOR('v', 1, long) |
205 | #define EXT2_IOC_SETVERSION _IOW('v', 2, long) |
206 | |
207 | /* |
208 | * Structure of an inode on the disk |
209 | */ |
210 | struct ext2_inode { |
211 | __u16 i_mode; /* File mode */ |
212 | __u16 i_uid; /* Low 16 bits of Owner Uid */ |
213 | __u32 i_size; /* Size in bytes */ |
214 | __u32 i_atime; /* Access time */ |
215 | __u32 i_ctime; /* Creation time */ |
216 | __u32 i_mtime; /* Modification time */ |
217 | __u32 i_dtime; /* Deletion Time */ |
218 | __u16 i_gid; /* Low 16 bits of Group Id */ |
219 | __u16 i_links_count; /* Links count */ |
220 | __u32 i_blocks; /* Blocks count */ |
221 | __u32 i_flags; /* File flags */ |
222 | union { |
223 | struct { |
224 | __u32 l_i_reserved1; |
225 | } linux1; |
226 | struct { |
227 | __u32 h_i_translator; |
228 | } hurd1; |
229 | struct { |
230 | __u32 m_i_reserved1; |
231 | } masix1; |
232 | } osd1; /* OS dependent 1 */ |
233 | __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ |
234 | __u32 i_generation; /* File version (for NFS) */ |
235 | __u32 i_file_acl; /* File ACL */ |
236 | __u32 i_dir_acl; /* Directory ACL */ |
237 | __u32 i_faddr; /* Fragment address */ |
238 | union { |
239 | struct { |
240 | __u8 l_i_frag; /* Fragment number */ |
241 | __u8 l_i_fsize; /* Fragment size */ |
242 | __u16 i_pad1; |
243 | __u16 l_i_uid_high; /* these 2 fields */ |
244 | __u16 l_i_gid_high; /* were reserved2[0] */ |
245 | __u32 l_i_reserved2; |
246 | } linux2; |
247 | struct { |
248 | __u8 h_i_frag; /* Fragment number */ |
249 | __u8 h_i_fsize; /* Fragment size */ |
250 | __u16 h_i_mode_high; |
251 | __u16 h_i_uid_high; |
252 | __u16 h_i_gid_high; |
253 | __u32 h_i_author; |
254 | } hurd2; |
255 | struct { |
256 | __u8 m_i_frag; /* Fragment number */ |
257 | __u8 m_i_fsize; /* Fragment size */ |
258 | __u16 m_pad1; |
259 | __u32 m_i_reserved2[2]; |
260 | } masix2; |
261 | } osd2; /* OS dependent 2 */ |
262 | }; |
263 | |
264 | /* |
265 | * Permanent part of an large inode on the disk |
266 | */ |
267 | struct ext2_inode_large { |
268 | __u16 i_mode; /* File mode */ |
269 | __u16 i_uid; /* Low 16 bits of Owner Uid */ |
270 | __u32 i_size; /* Size in bytes */ |
271 | __u32 i_atime; /* Access time */ |
272 | __u32 i_ctime; /* Creation time */ |
273 | __u32 i_mtime; /* Modification time */ |
274 | __u32 i_dtime; /* Deletion Time */ |
275 | __u16 i_gid; /* Low 16 bits of Group Id */ |
276 | __u16 i_links_count; /* Links count */ |
277 | __u32 i_blocks; /* Blocks count */ |
278 | __u32 i_flags; /* File flags */ |
279 | union { |
280 | struct { |
281 | __u32 l_i_reserved1; |
282 | } linux1; |
283 | struct { |
284 | __u32 h_i_translator; |
285 | } hurd1; |
286 | struct { |
287 | __u32 m_i_reserved1; |
288 | } masix1; |
289 | } osd1; /* OS dependent 1 */ |
290 | __u32 i_block[EXT2_N_BLOCKS];/* Pointers to blocks */ |
291 | __u32 i_generation; /* File version (for NFS) */ |
292 | __u32 i_file_acl; /* File ACL */ |
293 | __u32 i_dir_acl; /* Directory ACL */ |
294 | __u32 i_faddr; /* Fragment address */ |
295 | union { |
296 | struct { |
297 | __u8 l_i_frag; /* Fragment number */ |
298 | __u8 l_i_fsize; /* Fragment size */ |
299 | __u16 i_pad1; |
300 | __u16 l_i_uid_high; /* these 2 fields */ |
301 | __u16 l_i_gid_high; /* were reserved2[0] */ |
302 | __u32 l_i_reserved2; |
303 | } linux2; |
304 | struct { |
305 | __u8 h_i_frag; /* Fragment number */ |
306 | __u8 h_i_fsize; /* Fragment size */ |
307 | __u16 h_i_mode_high; |
308 | __u16 h_i_uid_high; |
309 | __u16 h_i_gid_high; |
310 | __u32 h_i_author; |
311 | } hurd2; |
312 | struct { |
313 | __u8 m_i_frag; /* Fragment number */ |
314 | __u8 m_i_fsize; /* Fragment size */ |
315 | __u16 m_pad1; |
316 | __u32 m_i_reserved2[2]; |
317 | } masix2; |
318 | } osd2; /* OS dependent 2 */ |
319 | __u16 i_extra_isize; |
320 | __u16 i_pad1; |
321 | }; |
322 | |
323 | #define i_size_high i_dir_acl |
324 | |
325 | /* |
326 | * File system states |
327 | */ |
328 | #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */ |
329 | #define EXT2_ERROR_FS 0x0002 /* Errors detected */ |
330 | |
331 | /* |
332 | * Mount flags |
333 | */ |
334 | #define EXT2_MOUNT_CHECK 0x0001 /* Do mount-time checks */ |
335 | #define EXT2_MOUNT_GRPID 0x0004 /* Create files with directory's group */ |
336 | #define EXT2_MOUNT_DEBUG 0x0008 /* Some debugging messages */ |
337 | #define EXT2_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */ |
338 | #define EXT2_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */ |
339 | #define EXT2_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */ |
340 | #define EXT2_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */ |
341 | #define EXT2_MOUNT_NO_UID32 0x0200 /* Disable 32-bit UIDs */ |
342 | |
343 | #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt |
344 | #define set_opt(o, opt) o |= EXT2_MOUNT_##opt |
345 | #define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \ |
346 | EXT2_MOUNT_##opt) |
347 | /* |
348 | * Maximal mount counts between two filesystem checks |
349 | */ |
350 | #define EXT2_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */ |
351 | #define EXT2_DFL_CHECKINTERVAL 0 /* Don't use interval check */ |
352 | |
353 | /* |
354 | * Behaviour when detecting errors |
355 | */ |
356 | #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */ |
357 | #define EXT2_ERRORS_RO 2 /* Remount fs read-only */ |
358 | #define EXT2_ERRORS_PANIC 3 /* Panic */ |
359 | #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE |
360 | |
361 | /* |
362 | * Structure of the super block |
363 | */ |
364 | struct ext2_super_block { |
365 | __u32 s_inodes_count; /* Inodes count */ |
366 | __u32 s_blocks_count; /* Blocks count */ |
367 | __u32 s_r_blocks_count; /* Reserved blocks count */ |
368 | __u32 s_free_blocks_count; /* Free blocks count */ |
369 | __u32 s_free_inodes_count; /* Free inodes count */ |
370 | __u32 s_first_data_block; /* First Data Block */ |
371 | __u32 s_log_block_size; /* Block size */ |
372 | __s32 s_log_frag_size; /* Fragment size */ |
373 | __u32 s_blocks_per_group; /* # Blocks per group */ |
374 | __u32 s_frags_per_group; /* # Fragments per group */ |
375 | __u32 s_inodes_per_group; /* # Inodes per group */ |
376 | __u32 s_mtime; /* Mount time */ |
377 | __u32 s_wtime; /* Write time */ |
378 | __u16 s_mnt_count; /* Mount count */ |
379 | __s16 s_max_mnt_count; /* Maximal mount count */ |
380 | __u16 s_magic; /* Magic signature */ |
381 | __u16 s_state; /* File system state */ |
382 | __u16 s_errors; /* Behaviour when detecting errors */ |
383 | __u16 s_minor_rev_level; /* minor revision level */ |
384 | __u32 s_lastcheck; /* time of last check */ |
385 | __u32 s_checkinterval; /* max. time between checks */ |
386 | __u32 s_creator_os; /* OS */ |
387 | __u32 s_rev_level; /* Revision level */ |
388 | __u16 s_def_resuid; /* Default uid for reserved blocks */ |
389 | __u16 s_def_resgid; /* Default gid for reserved blocks */ |
390 | /* |
391 | * These fields are for EXT2_DYNAMIC_REV superblocks only. |
392 | * |
393 | * Note: the difference between the compatible feature set and |
394 | * the incompatible feature set is that if there is a bit set |
395 | * in the incompatible feature set that the kernel doesn't |
396 | * know about, it should refuse to mount the filesystem. |
397 | * |
398 | * e2fsck's requirements are more strict; if it doesn't know |
399 | * about a feature in either the compatible or incompatible |
400 | * feature set, it must abort and not try to meddle with |
401 | * things it doesn't understand... |
402 | */ |
403 | __u32 s_first_ino; /* First non-reserved inode */ |
404 | __u16 s_inode_size; /* size of inode structure */ |
405 | __u16 s_block_group_nr; /* block group # of this superblock */ |
406 | __u32 s_feature_compat; /* compatible feature set */ |
407 | __u32 s_feature_incompat; /* incompatible feature set */ |
408 | __u32 s_feature_ro_compat; /* readonly-compatible feature set */ |
409 | __u8 s_uuid[16]; /* 128-bit uuid for volume */ |
410 | char s_volume_name[16]; /* volume name */ |
411 | char s_last_mounted[64]; /* directory where last mounted */ |
412 | __u32 s_algorithm_usage_bitmap; /* For compression */ |
413 | /* |
414 | * Performance hints. Directory preallocation should only |
415 | * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on. |
416 | */ |
417 | __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ |
418 | __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ |
419 | __u16 s_reserved_gdt_blocks; /* Per group table for online growth */ |
420 | /* |
421 | * Journaling support valid if EXT2_FEATURE_COMPAT_HAS_JOURNAL set. |
422 | */ |
423 | __u8 s_journal_uuid[16]; /* uuid of journal superblock */ |
424 | __u32 s_journal_inum; /* inode number of journal file */ |
425 | __u32 s_journal_dev; /* device number of journal file */ |
426 | __u32 s_last_orphan; /* start of list of inodes to delete */ |
427 | __u32 s_hash_seed[4]; /* HTREE hash seed */ |
428 | __u8 s_def_hash_version; /* Default hash version to use */ |
429 | __u8 s_jnl_backup_type; /* Default type of journal backup */ |
430 | __u16 s_reserved_word_pad; |
431 | __u32 s_default_mount_opts; |
432 | __u32 s_first_meta_bg; /* First metablock group */ |
433 | __u32 s_mkfs_time; /* When the filesystem was created */ |
434 | __u32 s_jnl_blocks[17]; /* Backup of the journal inode */ |
435 | __u32 s_reserved[172]; /* Padding to the end of the block */ |
436 | }; |
437 | |
438 | /* |
439 | * Codes for operating systems |
440 | */ |
441 | #define EXT2_OS_LINUX 0 |
442 | #define EXT2_OS_HURD 1 |
443 | #define EXT2_OS_MASIX 2 |
444 | #define EXT2_OS_FREEBSD 3 |
445 | #define EXT2_OS_LITES 4 |
446 | |
447 | /* |
448 | * Revision levels |
449 | */ |
450 | #define EXT2_GOOD_OLD_REV 0 /* The good old (original) format */ |
451 | #define EXT2_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */ |
452 | |
453 | #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV |
454 | #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV |
455 | |
456 | #define EXT2_GOOD_OLD_INODE_SIZE 128 |
457 | |
458 | /* |
459 | * Journal inode backup types |
460 | */ |
461 | #define EXT3_JNL_BACKUP_BLOCKS 1 |
462 | |
463 | /* |
464 | * Feature set definitions |
465 | */ |
466 | |
467 | #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \ |
468 | ( EXT2_SB(sb)->s_feature_compat & (mask) ) |
469 | #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \ |
470 | ( EXT2_SB(sb)->s_feature_ro_compat & (mask) ) |
471 | #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \ |
472 | ( EXT2_SB(sb)->s_feature_incompat & (mask) ) |
473 | |
474 | #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001 |
475 | #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002 |
476 | #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 |
477 | #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008 |
478 | #define EXT2_FEATURE_COMPAT_RESIZE_INODE 0x0010 |
479 | #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020 |
480 | |
481 | #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 |
482 | #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 |
483 | /* #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 not used */ |
484 | |
485 | #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 |
486 | #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 |
487 | #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ |
488 | #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */ |
489 | #define EXT2_FEATURE_INCOMPAT_META_BG 0x0010 |
490 | #define EXT3_FEATURE_INCOMPAT_EXTENTS 0x0040 |
491 | |
492 | |
493 | #define EXT2_FEATURE_COMPAT_SUPP 0 |
494 | #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE) |
495 | #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \ |
496 | EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \ |
497 | EXT2_FEATURE_RO_COMPAT_BTREE_DIR) |
498 | |
499 | /* |
500 | * Default values for user and/or group using reserved blocks |
501 | */ |
502 | #define EXT2_DEF_RESUID 0 |
503 | #define EXT2_DEF_RESGID 0 |
504 | |
505 | /* |
506 | * Default mount options |
507 | */ |
508 | #define EXT2_DEFM_DEBUG 0x0001 |
509 | #define EXT2_DEFM_BSDGROUPS 0x0002 |
510 | #define EXT2_DEFM_XATTR_USER 0x0004 |
511 | #define EXT2_DEFM_ACL 0x0008 |
512 | #define EXT2_DEFM_UID16 0x0010 |
513 | #define EXT3_DEFM_JMODE 0x0060 |
514 | #define EXT3_DEFM_JMODE_DATA 0x0020 |
515 | #define EXT3_DEFM_JMODE_ORDERED 0x0040 |
516 | #define EXT3_DEFM_JMODE_WBACK 0x0060 |
517 | |
518 | /* |
519 | * Structure of a directory entry |
520 | */ |
521 | #define EXT2_NAME_LEN 255 |
522 | |
523 | struct ext2_dir_entry { |
524 | __u32 inode; /* Inode number */ |
525 | __u16 rec_len; /* Directory entry length */ |
526 | __u16 name_len; /* Name length */ |
527 | char name[EXT2_NAME_LEN]; /* File name */ |
528 | }; |
529 | |
530 | /* |
531 | * The new version of the directory entry. Since EXT2 structures are |
532 | * stored in intel byte order, and the name_len field could never be |
533 | * bigger than 255 chars, it's safe to reclaim the extra byte for the |
534 | * file_type field. |
535 | */ |
536 | struct ext2_dir_entry_2 { |
537 | __u32 inode; /* Inode number */ |
538 | __u16 rec_len; /* Directory entry length */ |
539 | __u8 name_len; /* Name length */ |
540 | __u8 file_type; |
541 | char name[EXT2_NAME_LEN]; /* File name */ |
542 | }; |
543 | |
544 | /* |
545 | * Ext2 directory file types. Only the low 3 bits are used. The |
546 | * other bits are reserved for now. |
547 | */ |
548 | #define EXT2_FT_UNKNOWN 0 |
549 | #define EXT2_FT_REG_FILE 1 |
550 | #define EXT2_FT_DIR 2 |
551 | #define EXT2_FT_CHRDEV 3 |
552 | #define EXT2_FT_BLKDEV 4 |
553 | #define EXT2_FT_FIFO 5 |
554 | #define EXT2_FT_SOCK 6 |
555 | #define EXT2_FT_SYMLINK 7 |
556 | |
557 | #define EXT2_FT_MAX 8 |
558 | |
559 | /* |
560 | * EXT2_DIR_PAD defines the directory entries boundaries |
561 | * |
562 | * NOTE: It must be a multiple of 4 |
563 | */ |
564 | #define EXT2_DIR_PAD 4 |
565 | #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1) |
566 | #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \ |
567 | ~EXT2_DIR_ROUND) |
568 | |
569 | #endif |