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16#ifndef _LINUX_EXT2_FS_H
17#define _LINUX_EXT2_FS_H
18
19#include <linux/types.h>
20#include <linux/magic.h>
21
22
23
24
25
26
27
28
29#undef EXT2FS_DEBUG
30
31
32
33
34#define EXT2_DEFAULT_RESERVE_BLOCKS 8
35
36#define EXT2_MAX_RESERVE_BLOCKS 1027
37#define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0
38
39
40
41#define EXT2FS_DATE "95/08/09"
42#define EXT2FS_VERSION "0.5b"
43
44
45
46
47#ifdef EXT2FS_DEBUG
48# define ext2_debug(f, a...) { \
49 printk ("EXT2-fs DEBUG (%s, %d): %s:", \
50 __FILE__, __LINE__, __func__); \
51 printk (f, ## a); \
52 }
53#else
54# define ext2_debug(f, a...)
55#endif
56
57
58
59
60#define EXT2_BAD_INO 1
61#define EXT2_ROOT_INO 2
62#define EXT2_BOOT_LOADER_INO 5
63#define EXT2_UNDEL_DIR_INO 6
64
65
66#define EXT2_GOOD_OLD_FIRST_INO 11
67
68#ifdef __KERNEL__
69#include <linux/ext2_fs_sb.h>
70static inline struct ext2_sb_info *EXT2_SB(struct super_block *sb)
71{
72 return sb->s_fs_info;
73}
74#else
75
76
77
78#define EXT2_SB(sb) (sb)
79#endif
80
81
82
83
84#define EXT2_LINK_MAX 32000
85
86
87
88
89#define EXT2_MIN_BLOCK_SIZE 1024
90#define EXT2_MAX_BLOCK_SIZE 4096
91#define EXT2_MIN_BLOCK_LOG_SIZE 10
92#ifdef __KERNEL__
93# define EXT2_BLOCK_SIZE(s) ((s)->s_blocksize)
94#else
95# define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
96#endif
97#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
98#ifdef __KERNEL__
99# define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
100#else
101# define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
102#endif
103#ifdef __KERNEL__
104#define EXT2_ADDR_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_addr_per_block_bits)
105#define EXT2_INODE_SIZE(s) (EXT2_SB(s)->s_inode_size)
106#define EXT2_FIRST_INO(s) (EXT2_SB(s)->s_first_ino)
107#else
108#define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
109 EXT2_GOOD_OLD_INODE_SIZE : \
110 (s)->s_inode_size)
111#define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
112 EXT2_GOOD_OLD_FIRST_INO : \
113 (s)->s_first_ino)
114#endif
115
116
117
118
119#define EXT2_MIN_FRAG_SIZE 1024
120#define EXT2_MAX_FRAG_SIZE 4096
121#define EXT2_MIN_FRAG_LOG_SIZE 10
122#ifdef __KERNEL__
123# define EXT2_FRAG_SIZE(s) (EXT2_SB(s)->s_frag_size)
124# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_SB(s)->s_frags_per_block)
125#else
126# define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
127# define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
128#endif
129
130
131
132
133struct ext2_group_desc
134{
135 __le32 bg_block_bitmap;
136 __le32 bg_inode_bitmap;
137 __le32 bg_inode_table;
138 __le16 bg_free_blocks_count;
139 __le16 bg_free_inodes_count;
140 __le16 bg_used_dirs_count;
141 __le16 bg_pad;
142 __le32 bg_reserved[3];
143};
144
145
146
147
148#ifdef __KERNEL__
149# define EXT2_BLOCKS_PER_GROUP(s) (EXT2_SB(s)->s_blocks_per_group)
150# define EXT2_DESC_PER_BLOCK(s) (EXT2_SB(s)->s_desc_per_block)
151# define EXT2_INODES_PER_GROUP(s) (EXT2_SB(s)->s_inodes_per_group)
152# define EXT2_DESC_PER_BLOCK_BITS(s) (EXT2_SB(s)->s_desc_per_block_bits)
153#else
154# define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
155# define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
156# define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
157#endif
158
159
160
161
162#define EXT2_NDIR_BLOCKS 12
163#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
164#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
165#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
166#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
167
168
169
170
171#define EXT2_SECRM_FL FS_SECRM_FL
172#define EXT2_UNRM_FL FS_UNRM_FL
173#define EXT2_COMPR_FL FS_COMPR_FL
174#define EXT2_SYNC_FL FS_SYNC_FL
175#define EXT2_IMMUTABLE_FL FS_IMMUTABLE_FL
176#define EXT2_APPEND_FL FS_APPEND_FL
177#define EXT2_NODUMP_FL FS_NODUMP_FL
178#define EXT2_NOATIME_FL FS_NOATIME_FL
179
180#define EXT2_DIRTY_FL FS_DIRTY_FL
181#define EXT2_COMPRBLK_FL FS_COMPRBLK_FL
182#define EXT2_NOCOMP_FL FS_NOCOMP_FL
183#define EXT2_ECOMPR_FL FS_ECOMPR_FL
184
185#define EXT2_BTREE_FL FS_BTREE_FL
186#define EXT2_INDEX_FL FS_INDEX_FL
187#define EXT2_IMAGIC_FL FS_IMAGIC_FL
188#define EXT2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL
189#define EXT2_NOTAIL_FL FS_NOTAIL_FL
190#define EXT2_DIRSYNC_FL FS_DIRSYNC_FL
191#define EXT2_TOPDIR_FL FS_TOPDIR_FL
192#define EXT2_RESERVED_FL FS_RESERVED_FL
193
194#define EXT2_FL_USER_VISIBLE FS_FL_USER_VISIBLE
195#define EXT2_FL_USER_MODIFIABLE FS_FL_USER_MODIFIABLE
196
197
198#define EXT2_FL_INHERITED (EXT2_SECRM_FL | EXT2_UNRM_FL | EXT2_COMPR_FL |\
199 EXT2_SYNC_FL | EXT2_IMMUTABLE_FL | EXT2_APPEND_FL |\
200 EXT2_NODUMP_FL | EXT2_NOATIME_FL | EXT2_COMPRBLK_FL|\
201 EXT2_NOCOMP_FL | EXT2_JOURNAL_DATA_FL |\
202 EXT2_NOTAIL_FL | EXT2_DIRSYNC_FL)
203
204
205#define EXT2_REG_FLMASK (~(EXT2_DIRSYNC_FL | EXT2_TOPDIR_FL))
206
207
208#define EXT2_OTHER_FLMASK (EXT2_NODUMP_FL | EXT2_NOATIME_FL)
209
210
211static inline __u32 ext2_mask_flags(umode_t mode, __u32 flags)
212{
213 if (S_ISDIR(mode))
214 return flags;
215 else if (S_ISREG(mode))
216 return flags & EXT2_REG_FLMASK;
217 else
218 return flags & EXT2_OTHER_FLMASK;
219}
220
221
222
223
224#define EXT2_IOC_GETFLAGS FS_IOC_GETFLAGS
225#define EXT2_IOC_SETFLAGS FS_IOC_SETFLAGS
226#define EXT2_IOC_GETVERSION FS_IOC_GETVERSION
227#define EXT2_IOC_SETVERSION FS_IOC_SETVERSION
228#define EXT2_IOC_GETRSVSZ _IOR('f', 5, long)
229#define EXT2_IOC_SETRSVSZ _IOW('f', 6, long)
230
231
232
233
234#define EXT2_IOC32_GETFLAGS FS_IOC32_GETFLAGS
235#define EXT2_IOC32_SETFLAGS FS_IOC32_SETFLAGS
236#define EXT2_IOC32_GETVERSION FS_IOC32_GETVERSION
237#define EXT2_IOC32_SETVERSION FS_IOC32_SETVERSION
238
239
240
241
242struct ext2_inode {
243 __le16 i_mode;
244 __le16 i_uid;
245 __le32 i_size;
246 __le32 i_atime;
247 __le32 i_ctime;
248 __le32 i_mtime;
249 __le32 i_dtime;
250 __le16 i_gid;
251 __le16 i_links_count;
252 __le32 i_blocks;
253 __le32 i_flags;
254 union {
255 struct {
256 __le32 l_i_reserved1;
257 } linux1;
258 struct {
259 __le32 h_i_translator;
260 } hurd1;
261 struct {
262 __le32 m_i_reserved1;
263 } masix1;
264 } osd1;
265 __le32 i_block[EXT2_N_BLOCKS];
266 __le32 i_generation;
267 __le32 i_file_acl;
268 __le32 i_dir_acl;
269 __le32 i_faddr;
270 union {
271 struct {
272 __u8 l_i_frag;
273 __u8 l_i_fsize;
274 __u16 i_pad1;
275 __le16 l_i_uid_high;
276 __le16 l_i_gid_high;
277 __u32 l_i_reserved2;
278 } linux2;
279 struct {
280 __u8 h_i_frag;
281 __u8 h_i_fsize;
282 __le16 h_i_mode_high;
283 __le16 h_i_uid_high;
284 __le16 h_i_gid_high;
285 __le32 h_i_author;
286 } hurd2;
287 struct {
288 __u8 m_i_frag;
289 __u8 m_i_fsize;
290 __u16 m_pad1;
291 __u32 m_i_reserved2[2];
292 } masix2;
293 } osd2;
294};
295
296#define i_size_high i_dir_acl
297
298#if defined(__KERNEL__) || defined(__linux__)
299#define i_reserved1 osd1.linux1.l_i_reserved1
300#define i_frag osd2.linux2.l_i_frag
301#define i_fsize osd2.linux2.l_i_fsize
302#define i_uid_low i_uid
303#define i_gid_low i_gid
304#define i_uid_high osd2.linux2.l_i_uid_high
305#define i_gid_high osd2.linux2.l_i_gid_high
306#define i_reserved2 osd2.linux2.l_i_reserved2
307#endif
308
309#ifdef __hurd__
310#define i_translator osd1.hurd1.h_i_translator
311#define i_frag osd2.hurd2.h_i_frag
312#define i_fsize osd2.hurd2.h_i_fsize
313#define i_uid_high osd2.hurd2.h_i_uid_high
314#define i_gid_high osd2.hurd2.h_i_gid_high
315#define i_author osd2.hurd2.h_i_author
316#endif
317
318#ifdef __masix__
319#define i_reserved1 osd1.masix1.m_i_reserved1
320#define i_frag osd2.masix2.m_i_frag
321#define i_fsize osd2.masix2.m_i_fsize
322#define i_reserved2 osd2.masix2.m_i_reserved2
323#endif
324
325
326
327
328#define EXT2_VALID_FS 0x0001
329#define EXT2_ERROR_FS 0x0002
330
331
332
333
334#define EXT2_MOUNT_CHECK 0x000001
335#define EXT2_MOUNT_OLDALLOC 0x000002
336#define EXT2_MOUNT_GRPID 0x000004
337#define EXT2_MOUNT_DEBUG 0x000008
338#define EXT2_MOUNT_ERRORS_CONT 0x000010
339#define EXT2_MOUNT_ERRORS_RO 0x000020
340#define EXT2_MOUNT_ERRORS_PANIC 0x000040
341#define EXT2_MOUNT_MINIX_DF 0x000080
342#define EXT2_MOUNT_NOBH 0x000100
343#define EXT2_MOUNT_NO_UID32 0x000200
344#define EXT2_MOUNT_XATTR_USER 0x004000
345#define EXT2_MOUNT_POSIX_ACL 0x008000
346#define EXT2_MOUNT_XIP 0x010000
347#define EXT2_MOUNT_USRQUOTA 0x020000
348#define EXT2_MOUNT_GRPQUOTA 0x040000
349#define EXT2_MOUNT_RESERVATION 0x080000
350
351
352#define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
353#define set_opt(o, opt) o |= EXT2_MOUNT_##opt
354#define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \
355 EXT2_MOUNT_##opt)
356
357
358
359#define EXT2_DFL_MAX_MNT_COUNT 20
360#define EXT2_DFL_CHECKINTERVAL 0
361
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363
364
365#define EXT2_ERRORS_CONTINUE 1
366#define EXT2_ERRORS_RO 2
367#define EXT2_ERRORS_PANIC 3
368#define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
369
370
371
372
373struct ext2_super_block {
374 __le32 s_inodes_count;
375 __le32 s_blocks_count;
376 __le32 s_r_blocks_count;
377 __le32 s_free_blocks_count;
378 __le32 s_free_inodes_count;
379 __le32 s_first_data_block;
380 __le32 s_log_block_size;
381 __le32 s_log_frag_size;
382 __le32 s_blocks_per_group;
383 __le32 s_frags_per_group;
384 __le32 s_inodes_per_group;
385 __le32 s_mtime;
386 __le32 s_wtime;
387 __le16 s_mnt_count;
388 __le16 s_max_mnt_count;
389 __le16 s_magic;
390 __le16 s_state;
391 __le16 s_errors;
392 __le16 s_minor_rev_level;
393 __le32 s_lastcheck;
394 __le32 s_checkinterval;
395 __le32 s_creator_os;
396 __le32 s_rev_level;
397 __le16 s_def_resuid;
398 __le16 s_def_resgid;
399
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411
412 __le32 s_first_ino;
413 __le16 s_inode_size;
414 __le16 s_block_group_nr;
415 __le32 s_feature_compat;
416 __le32 s_feature_incompat;
417 __le32 s_feature_ro_compat;
418 __u8 s_uuid[16];
419 char s_volume_name[16];
420 char s_last_mounted[64];
421 __le32 s_algorithm_usage_bitmap;
422
423
424
425
426 __u8 s_prealloc_blocks;
427 __u8 s_prealloc_dir_blocks;
428 __u16 s_padding1;
429
430
431
432 __u8 s_journal_uuid[16];
433 __u32 s_journal_inum;
434 __u32 s_journal_dev;
435 __u32 s_last_orphan;
436 __u32 s_hash_seed[4];
437 __u8 s_def_hash_version;
438 __u8 s_reserved_char_pad;
439 __u16 s_reserved_word_pad;
440 __le32 s_default_mount_opts;
441 __le32 s_first_meta_bg;
442 __u32 s_reserved[190];
443};
444
445
446
447
448#define EXT2_OS_LINUX 0
449#define EXT2_OS_HURD 1
450#define EXT2_OS_MASIX 2
451#define EXT2_OS_FREEBSD 3
452#define EXT2_OS_LITES 4
453
454
455
456
457#define EXT2_GOOD_OLD_REV 0
458#define EXT2_DYNAMIC_REV 1
459
460#define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
461#define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
462
463#define EXT2_GOOD_OLD_INODE_SIZE 128
464
465
466
467
468
469#define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
470 ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
471#define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
472 ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
473#define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
474 ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
475#define EXT2_SET_COMPAT_FEATURE(sb,mask) \
476 EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
477#define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
478 EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
479#define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
480 EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
481#define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
482 EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
483#define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
484 EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
485#define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
486 EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
487
488#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
489#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
490#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
491#define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
492#define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
493#define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
494#define EXT2_FEATURE_COMPAT_ANY 0xffffffff
495
496#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
497#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
498#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
499#define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
500
501#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
502#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
503#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
504#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
505#define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
506#define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff
507
508#define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
509#define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
510 EXT2_FEATURE_INCOMPAT_META_BG)
511#define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
512 EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
513 EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
514#define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP
515#define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP
516
517
518
519
520#define EXT2_DEF_RESUID 0
521#define EXT2_DEF_RESGID 0
522
523
524
525
526#define EXT2_DEFM_DEBUG 0x0001
527#define EXT2_DEFM_BSDGROUPS 0x0002
528#define EXT2_DEFM_XATTR_USER 0x0004
529#define EXT2_DEFM_ACL 0x0008
530#define EXT2_DEFM_UID16 0x0010
531
532#define EXT3_DEFM_JMODE 0x0060
533#define EXT3_DEFM_JMODE_DATA 0x0020
534#define EXT3_DEFM_JMODE_ORDERED 0x0040
535#define EXT3_DEFM_JMODE_WBACK 0x0060
536
537
538
539
540#define EXT2_NAME_LEN 255
541
542struct ext2_dir_entry {
543 __le32 inode;
544 __le16 rec_len;
545 __le16 name_len;
546 char name[EXT2_NAME_LEN];
547};
548
549
550
551
552
553
554
555struct ext2_dir_entry_2 {
556 __le32 inode;
557 __le16 rec_len;
558 __u8 name_len;
559 __u8 file_type;
560 char name[EXT2_NAME_LEN];
561};
562
563
564
565
566
567enum {
568 EXT2_FT_UNKNOWN,
569 EXT2_FT_REG_FILE,
570 EXT2_FT_DIR,
571 EXT2_FT_CHRDEV,
572 EXT2_FT_BLKDEV,
573 EXT2_FT_FIFO,
574 EXT2_FT_SOCK,
575 EXT2_FT_SYMLINK,
576 EXT2_FT_MAX
577};
578
579
580
581
582
583
584#define EXT2_DIR_PAD 4
585#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
586#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
587 ~EXT2_DIR_ROUND)
588#define EXT2_MAX_REC_LEN ((1<<16)-1)
589
590#endif
591