ext2_fs.h
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005: card@masi.ibp.fr
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015:
016: #ifndef _LINUX_EXT2_FS_H
017: #define _LINUX_EXT2_FS_H
018:
019: #include <linux/types.h>
020: #include <linux/magic.h>
021: #include <linux/fs.h>
022:
023:
024:
025:
026:
027:
028: BUG
029:
030: #undef EXT2FS_DEBUG
031:
032:
033:
034:
035: #define EXT2_DEFAULT_RESERVE_BLOCKS 8
036:
037: #define EXT2_MAX_RESERVE_BLOCKS 1027
038: #define EXT2_RESERVE_WINDOW_NOT_ALLOCATED 0
039:
040:
041:
042: #define EXT2FS_DATE "95/08/09"
043: #define EXT2FS_VERSION "0.5b"
044:
045:
046:
047:
048: #ifdef EXT2FS_DEBUG
049: # define ext2_debug(f, a...) { \
050: printk ("EXT2-fs DEBUG (%s, %d): %s:", \
051: __FILE__, __LINE__, __func__); \
052: printk (f, ## a); \
053: }
054: #else
055: # define ext2_debug(f, a...)
056:
057:
058:
059:
060:
061: #define EXT2_BAD_INO 1
062: #define EXT2_ROOT_INO 2
063: #define EXT2_BOOT_LOADER_INO 5
064: #define EXT2_UNDEL_DIR_INO 6
065:
066:
067: #define EXT2_GOOD_OLD_FIRST_INO 11
068:
069:
070:
071:
072: #define EXT2_SB(sb) (sb)
073:
074:
075:
076:
077: #define EXT2_LINK_MAX 32000
078:
079:
080:
081:
082: #define EXT2_MIN_BLOCK_SIZE 1024
083: #define EXT2_MAX_BLOCK_SIZE 4096
084: #define EXT2_MIN_BLOCK_LOG_SIZE 10
085: # define EXT2_BLOCK_SIZE(s) (EXT2_MIN_BLOCK_SIZE << (s)->s_log_block_size)
086: #define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
087: # define EXT2_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
088: #define EXT2_INODE_SIZE(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
089: EXT2_GOOD_OLD_INODE_SIZE : \
090: (s)->s_inode_size)
091: #define EXT2_FIRST_INO(s) (((s)->s_rev_level == EXT2_GOOD_OLD_REV) ? \
092: EXT2_GOOD_OLD_FIRST_INO : \
093: (s)->s_first_ino)
094:
095:
096:
097:
098: #define EXT2_MIN_FRAG_SIZE 1024
099: #define EXT2_MAX_FRAG_SIZE 4096
100: #define EXT2_MIN_FRAG_LOG_SIZE 10
101: # define EXT2_FRAG_SIZE(s) (EXT2_MIN_FRAG_SIZE << (s)->s_log_frag_size)
102: # define EXT2_FRAGS_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / EXT2_FRAG_SIZE(s))
103:
104:
105:
106:
107: struct ext2_group_desc
108: {
109: __le32 bg_block_bitmap;
110: __le32 bg_inode_bitmap;
111: __le32 bg_inode_table;
112: __le16 bg_free_blocks_count;
113: __le16 bg_free_inodes_count;
114: __le16 bg_used_dirs_count;
115: __le16 bg_pad;
116: __le32 bg_reserved[3];
117: };
118:
119:
120:
121:
122: # define EXT2_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
123: # define EXT2_DESC_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
124: # define EXT2_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
125:
126:
127:
128:
129: #define EXT2_NDIR_BLOCKS 12
130: #define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
131: #define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
132: #define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
133: #define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
134:
135:
136:
137:
138: #define EXT2_SECRM_FL FS_SECRM_FL
139: #define EXT2_UNRM_FL FS_UNRM_FL
140: #define EXT2_COMPR_FL FS_COMPR_FL
141: #define EXT2_SYNC_FL FS_SYNC_FL
142: #define EXT2_IMMUTABLE_FL FS_IMMUTABLE_FL
143: #define EXT2_APPEND_FL FS_APPEND_FL
144: #define EXT2_NODUMP_FL FS_NODUMP_FL
145: #define EXT2_NOATIME_FL FS_NOATIME_FL
146:
147: #define EXT2_DIRTY_FL FS_DIRTY_FL
148: #define EXT2_COMPRBLK_FL FS_COMPRBLK_FL
149: #define EXT2_NOCOMP_FL FS_NOCOMP_FL
150: #define EXT2_ECOMPR_FL FS_ECOMPR_FL
151:
152: #define EXT2_BTREE_FL FS_BTREE_FL
153: #define EXT2_INDEX_FL FS_INDEX_FL
154: #define EXT2_IMAGIC_FL FS_IMAGIC_FL
155: #define EXT2_JOURNAL_DATA_FL FS_JOURNAL_DATA_FL
156: #define EXT2_NOTAIL_FL FS_NOTAIL_FL
157: #define EXT2_DIRSYNC_FL FS_DIRSYNC_FL
158: #define EXT2_TOPDIR_FL FS_TOPDIR_FL
159: #define EXT2_RESERVED_FL FS_RESERVED_FL
160:
161: #define EXT2_FL_USER_VISIBLE FS_FL_USER_VISIBLE
162: #define EXT2_FL_USER_MODIFIABLE FS_FL_USER_MODIFIABLE
163:
164:
165: #define EXT2_FL_INHERITED (EXT2_SECRM_FL | EXT2_UNRM_FL | EXT2_COMPR_FL |\
166: EXT2_SYNC_FL | EXT2_NODUMP_FL |\
167: EXT2_NOATIME_FL | EXT2_COMPRBLK_FL |\
168: EXT2_NOCOMP_FL | EXT2_JOURNAL_DATA_FL |\
169: EXT2_NOTAIL_FL | EXT2_DIRSYNC_FL)
170:
171:
172: #define EXT2_REG_FLMASK (~(EXT2_DIRSYNC_FL | EXT2_TOPDIR_FL))
173:
174:
175: #define EXT2_OTHER_FLMASK (EXT2_NODUMP_FL | EXT2_NOATIME_FL)
176:
177:
178: static __inline__ __u32 ext2_mask_flags(umode_t mode, __u32 flags)
179: {
180: if (S_ISDIR(mode))
181: return flags;
182: else if (S_ISREG(mode))
183: return flags & EXT2_REG_FLMASK;
184: else
185: return flags & EXT2_OTHER_FLMASK;
186: }
187:
188:
189:
190:
191: #define EXT2_IOC_GETFLAGS FS_IOC_GETFLAGS
192: #define EXT2_IOC_SETFLAGS FS_IOC_SETFLAGS
193: #define EXT2_IOC_GETVERSION FS_IOC_GETVERSION
194: #define EXT2_IOC_SETVERSION FS_IOC_SETVERSION
195: #define EXT2_IOC_GETRSVSZ _IOR('f', 5, long)
196: #define EXT2_IOC_SETRSVSZ _IOW('f', 6, long)
197:
198:
199:
200:
201: #define EXT2_IOC32_GETFLAGS FS_IOC32_GETFLAGS
202: #define EXT2_IOC32_SETFLAGS FS_IOC32_SETFLAGS
203: #define EXT2_IOC32_GETVERSION FS_IOC32_GETVERSION
204: #define EXT2_IOC32_SETVERSION FS_IOC32_SETVERSION
205:
206:
207:
208:
209: struct ext2_inode {
210: __le16 i_mode;
211: __le16 i_uid;
212: __le32 i_size;
213: __le32 i_atime;
214: __le32 i_ctime;
215: __le32 i_mtime;
216: __le32 i_dtime;
217: __le16 i_gid;
218: __le16 i_links_count;
219: __le32 i_blocks;
220: __le32 i_flags;
221: union {
222: struct {
223: __le32 l_i_reserved1;
224: } linux1;
225: struct {
226: __le32 h_i_translator;
227: } hurd1;
228: struct {
229: __le32 m_i_reserved1;
230: } masix1;
231: } osd1;
232: __le32 i_block[EXT2_N_BLOCKS];
233: __le32 i_generation;
234: __le32 i_file_acl;
235: __le32 i_dir_acl;
236: __le32 i_faddr;
237: union {
238: struct {
239: __u8 l_i_frag;
240: __u8 l_i_fsize;
241: __u16 i_pad1;
242: __le16 l_i_uid_high;
243: __le16 l_i_gid_high;
244: __u32 l_i_reserved2;
245: } linux2;
246: struct {
247: __u8 h_i_frag;
248: __u8 h_i_fsize;
249: __le16 h_i_mode_high;
250: __le16 h_i_uid_high;
251: __le16 h_i_gid_high;
252: __le32 h_i_author;
253: } hurd2;
254: struct {
255: __u8 m_i_frag;
256: __u8 m_i_fsize;
257: __u16 m_pad1;
258: __u32 m_i_reserved2[2];
259: } masix2;
260: } osd2;
261: };
262:
263: #define i_size_high i_dir_acl
264:
265: #if defined(__KERNEL__) || defined(__linux__)
266: #define i_reserved1 osd1.linux1.l_i_reserved1
267: #define i_frag osd2.linux2.l_i_frag
268: #define i_fsize osd2.linux2.l_i_fsize
269: #define i_uid_low i_uid
270: #define i_gid_low i_gid
271: #define i_uid_high osd2.linux2.l_i_uid_high
272: #define i_gid_high osd2.linux2.l_i_gid_high
273: #define i_reserved2 osd2.linux2.l_i_reserved2
274: #endif
275:
276: #ifdef __hurd__
277: #define i_translator osd1.hurd1.h_i_translator
278: #define i_frag osd2.hurd2.h_i_frag
279: #define i_fsize osd2.hurd2.h_i_fsize
280: #define i_uid_high osd2.hurd2.h_i_uid_high
281: #define i_gid_high osd2.hurd2.h_i_gid_high
282: #define i_author osd2.hurd2.h_i_author
283: #endif
284:
285: #ifdef __masix__
286: #define i_reserved1 osd1.masix1.m_i_reserved1
287: #define i_frag osd2.masix2.m_i_frag
288: #define i_fsize osd2.masix2.m_i_fsize
289: #define i_reserved2 osd2.masix2.m_i_reserved2
290: #endif
291:
292:
293:
294:
295: #define EXT2_VALID_FS 0x0001
296: #define EXT2_ERROR_FS 0x0002
297:
298:
299:
300:
301: #define EXT2_MOUNT_CHECK 0x000001
302: #define EXT2_MOUNT_OLDALLOC 0x000002
303: #define EXT2_MOUNT_GRPID 0x000004
304: #define EXT2_MOUNT_DEBUG 0x000008
305: #define EXT2_MOUNT_ERRORS_CONT 0x000010
306: #define EXT2_MOUNT_ERRORS_RO 0x000020
307: #define EXT2_MOUNT_ERRORS_PANIC 0x000040
308: #define EXT2_MOUNT_MINIX_DF 0x000080
309: #define EXT2_MOUNT_NOBH 0x000100
310: #define EXT2_MOUNT_NO_UID32 0x000200
311: #define EXT2_MOUNT_XATTR_USER 0x004000
312: #define EXT2_MOUNT_POSIX_ACL 0x008000
313: #define EXT2_MOUNT_XIP 0x010000
314: #define EXT2_MOUNT_USRQUOTA 0x020000
315: #define EXT2_MOUNT_GRPQUOTA 0x040000
316: #define EXT2_MOUNT_RESERVATION 0x080000
317:
318:
319: #define clear_opt(o, opt) o &= ~EXT2_MOUNT_##opt
320: #define set_opt(o, opt) o |= EXT2_MOUNT_##opt
321: #define test_opt(sb, opt) (EXT2_SB(sb)->s_mount_opt & \
322: EXT2_MOUNT_##opt)
323:
324:
325:
326: #define EXT2_DFL_MAX_MNT_COUNT 20
327: #define EXT2_DFL_CHECKINTERVAL 0
328:
329:
330:
331:
332: #define EXT2_ERRORS_CONTINUE 1
333: #define EXT2_ERRORS_RO 2
334: #define EXT2_ERRORS_PANIC 3
335: #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
336:
337:
338:
339:
340: struct ext2_super_block {
341: __le32 s_inodes_count;
342: __le32 s_blocks_count;
343: __le32 s_r_blocks_count;
344: __le32 s_free_blocks_count;
345: __le32 s_free_inodes_count;
346: __le32 s_first_data_block;
347: __le32 s_log_block_size;
348: __le32 s_log_frag_size;
349: __le32 s_blocks_per_group;
350: __le32 s_frags_per_group;
351: __le32 s_inodes_per_group;
352: __le32 s_mtime;
353: __le32 s_wtime;
354: __le16 s_mnt_count;
355: __le16 s_max_mnt_count;
356: __le16 s_magic;
357: __le16 s_state;
358: __le16 s_errors;
359: __le16 s_minor_rev_level;
360: __le32 s_lastcheck;
361: __le32 s_checkinterval;
362: __le32 s_creator_os;
363: __le32 s_rev_level;
364: __le16 s_def_resuid;
365: __le16 s_def_resgid;
366:
367:
368:
369:
370:
371:
372:
373:
374:
375:
376:
377:
378:
379: __le32 s_first_ino;
380: __le16 s_inode_size;
381: __le16 s_block_group_nr;
382: __le32 s_feature_compat;
383: __le32 s_feature_incompat;
384: __le32 s_feature_ro_compat;
385: __u8 s_uuid[16];
386: char s_volume_name[16];
387: char s_last_mounted[64];
388: __le32 s_algorithm_usage_bitmap;
389:
390:
391:
392:
393: __u8 s_prealloc_blocks;
394: __u8 s_prealloc_dir_blocks;
395: __u16 s_padding1;
396:
397:
398:
399: __u8 s_journal_uuid[16];
400: __u32 s_journal_inum;
401: __u32 s_journal_dev;
402: __u32 s_last_orphan;
403: __u32 s_hash_seed[4];
404: __u8 s_def_hash_version;
405: __u8 s_reserved_char_pad;
406: __u16 s_reserved_word_pad;
407: __le32 s_default_mount_opts;
408: __le32 s_first_meta_bg;
409: __u32 s_reserved[190];
410: };
411:
412:
413:
414:
415: #define EXT2_OS_LINUX 0
416: #define EXT2_OS_HURD 1
417: #define EXT2_OS_MASIX 2
418: #define EXT2_OS_FREEBSD 3
419: #define EXT2_OS_LITES 4
420:
421:
422:
423:
424: #define EXT2_GOOD_OLD_REV 0
425: #define EXT2_DYNAMIC_REV 1
426:
427: #define EXT2_CURRENT_REV EXT2_GOOD_OLD_REV
428: #define EXT2_MAX_SUPP_REV EXT2_DYNAMIC_REV
429:
430: #define EXT2_GOOD_OLD_INODE_SIZE 128
431:
432:
433:
434:
435:
436: #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
437: ( EXT2_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
438: #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
439: ( EXT2_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
440: #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
441: ( EXT2_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
442: #define EXT2_SET_COMPAT_FEATURE(sb,mask) \
443: EXT2_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
444: #define EXT2_SET_RO_COMPAT_FEATURE(sb,mask) \
445: EXT2_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
446: #define EXT2_SET_INCOMPAT_FEATURE(sb,mask) \
447: EXT2_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
448: #define EXT2_CLEAR_COMPAT_FEATURE(sb,mask) \
449: EXT2_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
450: #define EXT2_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
451: EXT2_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
452: #define EXT2_CLEAR_INCOMPAT_FEATURE(sb,mask) \
453: EXT2_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
454:
455: #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
456: #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
457: #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
458: #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
459: #define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
460: #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
461: #define EXT2_FEATURE_COMPAT_ANY 0xffffffff
462:
463: #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
464: #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
465: #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
466: #define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
467:
468: #define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001
469: #define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002
470: #define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004
471: #define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008
472: #define EXT2_FEATURE_INCOMPAT_META_BG 0x0010
473: #define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff
474:
475: #define EXT2_FEATURE_COMPAT_SUPP EXT2_FEATURE_COMPAT_EXT_ATTR
476: #define EXT2_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE| \
477: EXT2_FEATURE_INCOMPAT_META_BG)
478: #define EXT2_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER| \
479: EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
480: EXT2_FEATURE_RO_COMPAT_BTREE_DIR)
481: #define EXT2_FEATURE_RO_COMPAT_UNSUPPORTED ~EXT2_FEATURE_RO_COMPAT_SUPP
482: #define EXT2_FEATURE_INCOMPAT_UNSUPPORTED ~EXT2_FEATURE_INCOMPAT_SUPP
483:
484:
485:
486:
487: #define EXT2_DEF_RESUID 0
488: #define EXT2_DEF_RESGID 0
489:
490:
491:
492:
493: #define EXT2_DEFM_DEBUG 0x0001
494: #define EXT2_DEFM_BSDGROUPS 0x0002
495: #define EXT2_DEFM_XATTR_USER 0x0004
496: #define EXT2_DEFM_ACL 0x0008
497: #define EXT2_DEFM_UID16 0x0010
498:
499: #define EXT3_DEFM_JMODE 0x0060
500: #define EXT3_DEFM_JMODE_DATA 0x0020
501: #define EXT3_DEFM_JMODE_ORDERED 0x0040
502: #define EXT3_DEFM_JMODE_WBACK 0x0060
503:
504:
505:
506:
507: #define EXT2_NAME_LEN 255
508:
509: struct ext2_dir_entry {
510: __le32 inode;
511: __le16 rec_len;
512: __le16 name_len;
513: char name[EXT2_NAME_LEN];
514: };
515:
516:
517:
518:
519:
520:
521:
522: struct ext2_dir_entry_2 {
523: __le32 inode;
524: __le16 rec_len;
525: __u8 name_len;
526: __u8 file_type;
527: char name[EXT2_NAME_LEN];
528: };
529:
530:
531:
532:
533:
534: enum {
535: EXT2_FT_UNKNOWN = 0,
536: EXT2_FT_REG_FILE = 1,
537: EXT2_FT_DIR = 2,
538: EXT2_FT_CHRDEV = 3,
539: EXT2_FT_BLKDEV = 4,
540: EXT2_FT_FIFO = 5,
541: EXT2_FT_SOCK = 6,
542: EXT2_FT_SYMLINK = 7,
543: EXT2_FT_MAX
544: };
545:
546:
547:
548:
549:
550:
551: #define EXT2_DIR_PAD 4
552: #define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
553: #define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
554: ~EXT2_DIR_ROUND)
555: #define EXT2_MAX_REC_LEN ((1<<16)-1)
556:
557: #endif
558:
© Andrew Scott 2006 -
2025,
All Rights Reserved