1 /*
2 * ext2fs.h --- ext2fs
3 *
4 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Public
8 * License.
9 * %End-Header%
10 */
11
12 #ifndef _EXT2FS_EXT2FS_H
13 #define _EXT2FS_EXT2FS_H
14
15 #ifdef __GNUC__
16 #define EXT2FS_ATTR(x) __attribute__(x)
17 #else
18 #define EXT2FS_ATTR(x)
19 #endif
20
21 #ifdef __cplusplus
22 extern "C" {
23 #endif
24
25 /*
26 * Non-GNU C compilers won't necessarily understand inline
27 */
28 #if (!defined(__GNUC__) && !defined(__WATCOMC__))
29 #define NO_INLINE_FUNCS
30 #endif
31
32 /*
33 * Build in support for byte-swapping filesystems if we the feature
34 * has been configured or if we're being built on a CPU architecture
35 * with a non-native byte order.
36 */
37 #if defined(ENABLE_SWAPFS) || defined(WORDS_BIGENDIAN)
38 #define EXT2FS_ENABLE_SWAPFS
39 #endif
40
41 /*
42 * Where the master copy of the superblock is located, and how big
43 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because
44 * the size of the superblock structure is not necessarily trustworthy
45 * (some versions have the padding set up so that the superblock is
46 * 1032 bytes long).
47 */
48 #define SUPERBLOCK_OFFSET 1024
49 #define SUPERBLOCK_SIZE 1024
50
51 /*
52 * The last ext2fs revision level that this version of the library is
53 * able to support.
54 */
55 #define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV
56
57 #ifdef HAVE_SYS_TYPES_H
58 #include <sys/types.h>
59 #endif
60
61 #include <stdio.h>
62 #include <stdlib.h>
63 #include <string.h>
64
65 #if EXT2_FLAT_INCLUDES
66 #include "e2_types.h"
67 #include "ext2_fs.h"
68 #include "ext3_extents.h"
69 #else
70 #include <ext2fs/ext2_types.h>
71 #include <ext2fs/ext2_fs.h>
72 #include <ext2fs/ext3_extents.h>
73 #endif /* EXT2_FLAT_INCLUDES */
74
75 typedef __u32 ext2_ino_t;
76 typedef __u32 blk_t;
77 typedef __u32 dgrp_t;
78 typedef __u32 ext2_off_t;
79 typedef __s64 e2_blkcnt_t;
80 typedef __u32 ext2_dirhash_t;
81
82 #if EXT2_FLAT_INCLUDES
83 #include "com_err.h"
84 #include "ext2_io.h"
85 #include "ext2_err.h"
86 #else
87 #include <et/com_err.h>
88 #include <ext2fs/ext2_io.h>
89 #include <ext2fs/ext2_err.h>
90 #endif
91
92 /*
93 * Portability help for Microsoft Visual C++
94 */
95 #ifdef _MSC_VER
96 #define EXT2_QSORT_TYPE int __cdecl
97 #else
98 #define EXT2_QSORT_TYPE int
99 #endif
100
101 typedef struct struct_ext2_filsys *ext2_filsys;
102
103 struct ext2fs_struct_generic_bitmap {
104 errcode_t magic;
105 ext2_filsys fs;
106 __u32 start, end;
107 __u32 real_end;
108 char * description;
109 char * bitmap;
110 errcode_t base_error_code;
111 __u32 reserved[7];
112 };
113
114 #define EXT2FS_MARK_ERROR 0
115 #define EXT2FS_UNMARK_ERROR 1
116 #define EXT2FS_TEST_ERROR 2
117
118 typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap;
119 typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap;
120 typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap;
121
122 #define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s)
123
124
125 /*
126 * Badblocks list definitions
127 */
128
129 typedef struct ext2_struct_u32_list *ext2_badblocks_list;
130 typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate;
131
132 typedef struct ext2_struct_u32_list *ext2_u32_list;
133 typedef struct ext2_struct_u32_iterate *ext2_u32_iterate;
134
135 /* old */
136 typedef struct ext2_struct_u32_list *badblocks_list;
137 typedef struct ext2_struct_u32_iterate *badblocks_iterate;
138
139 #define BADBLOCKS_FLAG_DIRTY 1
140
141 /*
142 * ext2_dblist structure and abstractions (see dblist.c)
143 */
144 struct ext2_db_entry {
145 ext2_ino_t ino;
146 blk_t blk;
147 int blockcnt;
148 };
149
150 typedef struct ext2_struct_dblist *ext2_dblist;
151
152 #define DBLIST_ABORT 1
153
154 /*
155 * ext2_fileio definitions
156 */
157
158 #define EXT2_FILE_WRITE 0x0001
159 #define EXT2_FILE_CREATE 0x0002
160
161 #define EXT2_FILE_MASK 0x00FF
162
163 #define EXT2_FILE_BUF_DIRTY 0x4000
164 #define EXT2_FILE_BUF_VALID 0x2000
165
166 typedef struct ext2_file *ext2_file_t;
167
168 #define EXT2_SEEK_SET 0
169 #define EXT2_SEEK_CUR 1
170 #define EXT2_SEEK_END 2
171
172 /*
173 * Flags for the ext2_filsys structure and for ext2fs_open()
174 */
175 #define EXT2_FLAG_RW 0x01
176 #define EXT2_FLAG_CHANGED 0x02
177 #define EXT2_FLAG_DIRTY 0x04
178 #define EXT2_FLAG_VALID 0x08
179 #define EXT2_FLAG_IB_DIRTY 0x10
180 #define EXT2_FLAG_BB_DIRTY 0x20
181 #define EXT2_FLAG_SWAP_BYTES 0x40
182 #define EXT2_FLAG_SWAP_BYTES_READ 0x80
183 #define EXT2_FLAG_SWAP_BYTES_WRITE 0x100
184 #define EXT2_FLAG_MASTER_SB_ONLY 0x200
185 #define EXT2_FLAG_FORCE 0x400
186 #define EXT2_FLAG_SUPER_ONLY 0x800
187 #define EXT2_FLAG_JOURNAL_DEV_OK 0x1000
188 #define EXT2_FLAG_IMAGE_FILE 0x2000
189 #define EXT2_FLAG_EXCLUSIVE 0x4000
190 #define EXT2_FLAG_SOFTSUPP_FEATURES 0x8000
191 #define EXT2_FLAG_NOFREE_ON_ERROR 0x10000
192
193 /*
194 * Special flag in the ext2 inode i_flag field that means that this is
195 * a new inode. (So that ext2_write_inode() can clear extra fields.)
196 */
197 #define EXT2_NEW_INODE_FL 0x80000000
198
199 /*
200 * Flags for mkjournal
201 *
202 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock
203 */
204 #define EXT2_MKJOURNAL_V1_SUPER 0x0000001
205
206 struct struct_ext2_filsys {
207 errcode_t magic;
208 io_channel io;
209 int flags;
210 char * device_name;
211 struct ext2_super_block * super;
212 unsigned int blocksize;
213 int fragsize;
214 dgrp_t group_desc_count;
215 unsigned long desc_blocks;
216 struct ext2_group_desc * group_desc;
217 int inode_blocks_per_group;
218 ext2fs_inode_bitmap inode_map;
219 ext2fs_block_bitmap block_map;
220 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
221 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino);
222 errcode_t (*write_bitmaps)(ext2_filsys fs);
223 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino,
224 struct ext2_inode *inode);
225 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino,
226 struct ext2_inode *inode);
227 ext2_badblocks_list badblocks;
228 ext2_dblist dblist;
229 __u32 stride; /* for mke2fs */
230 struct ext2_super_block * orig_super;
231 struct ext2_image_hdr * image_header;
232 __u32 umask;
233 time_t now;
234 /*
235 * Reserved for future expansion
236 */
237 __u32 reserved[7];
238
239 /*
240 * Reserved for the use of the calling application.
241 */
242 void * priv_data;
243
244 /*
245 * Inode cache
246 */
247 struct ext2_inode_cache *icache;
248 io_channel image_io;
249 };
250
251 #if EXT2_FLAT_INCLUDES
252 #include "e2_bitops.h"
253 #else
254 #include <ext2fs/bitops.h>
255 #endif
256
257 /*
258 * Return flags for the block iterator functions
259 */
260 #define BLOCK_CHANGED 1
261 #define BLOCK_ABORT 2
262 #define BLOCK_ERROR 4
263
264 /*
265 * Block interate flags
266 *
267 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator
268 * function should be called on blocks where the block number is zero.
269 * This is used by ext2fs_expand_dir() to be able to add a new block
270 * to an inode. It can also be used for programs that want to be able
271 * to deal with files that contain "holes".
272 *
273 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for
274 * the indirect, doubly indirect, etc. blocks should be called after
275 * all of the blocks containined in the indirect blocks are processed.
276 * This is useful if you are going to be deallocating blocks from an
277 * inode.
278 *
279 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be
280 * called for data blocks only.
281 *
282 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs
283 * ext2fs_block_iterate2 that large files won't be accepted.
284 */
285 #define BLOCK_FLAG_APPEND 1
286 #define BLOCK_FLAG_HOLE 1
287 #define BLOCK_FLAG_DEPTH_TRAVERSE 2
288 #define BLOCK_FLAG_DATA_ONLY 4
289
290 #define BLOCK_FLAG_NO_LARGE 0x1000
291
292 /*
293 * Magic "block count" return values for the block iterator function.
294 */
295 #define BLOCK_COUNT_IND (-1)
296 #define BLOCK_COUNT_DIND (-2)
297 #define BLOCK_COUNT_TIND (-3)
298 #define BLOCK_COUNT_TRANSLATOR (-4)
299
300 #if 0
301 /*
302 * Flags for ext2fs_move_blocks
303 */
304 #define EXT2_BMOVE_GET_DBLIST 0x0001
305 #define EXT2_BMOVE_DEBUG 0x0002
306 #endif
307
308 /*
309 * Flags for directory block reading and writing functions
310 */
311 #define EXT2_DIRBLOCK_V2_STRUCT 0x0001
312
313 /*
314 * Return flags for the directory iterator functions
315 */
316 #define DIRENT_CHANGED 1
317 #define DIRENT_ABORT 2
318 #define DIRENT_ERROR 3
319
320 /*
321 * Directory iterator flags
322 */
323
324 #define DIRENT_FLAG_INCLUDE_EMPTY 1
325 #define DIRENT_FLAG_INCLUDE_REMOVED 2
326
327 #define DIRENT_DOT_FILE 1
328 #define DIRENT_DOT_DOT_FILE 2
329 #define DIRENT_OTHER_FILE 3
330 #define DIRENT_DELETED_FILE 4
331
332 /*
333 * Inode scan definitions
334 */
335 typedef struct ext2_struct_inode_scan *ext2_inode_scan;
336
337 /*
338 * ext2fs_scan flags
339 */
340 #define EXT2_SF_CHK_BADBLOCKS 0x0001
341 #define EXT2_SF_BAD_INODE_BLK 0x0002
342 #define EXT2_SF_BAD_EXTRA_BYTES 0x0004
343 #define EXT2_SF_SKIP_MISSING_ITABLE 0x0008
344 #define EXT2_SF_DO_LAZY 0x0010
345
346 /*
347 * ext2fs_check_if_mounted flags
348 */
349 #define EXT2_MF_MOUNTED 1
350 #define EXT2_MF_ISROOT 2
351 #define EXT2_MF_READONLY 4
352 #define EXT2_MF_SWAP 8
353 #define EXT2_MF_BUSY 16
354
355 /*
356 * Ext2/linux mode flags. We define them here so that we don't need
357 * to depend on the OS's sys/stat.h, since we may be compiling on a
358 * non-Linux system.
359 */
360 #define LINUX_S_IFMT 00170000
361 #define LINUX_S_IFSOCK 0140000
362 #define LINUX_S_IFLNK 0120000
363 #define LINUX_S_IFREG 0100000
364 #define LINUX_S_IFBLK 0060000
365 #define LINUX_S_IFDIR 0040000
366 #define LINUX_S_IFCHR 0020000
367 #define LINUX_S_IFIFO 0010000
368 #define LINUX_S_ISUID 0004000
369 #define LINUX_S_ISGID 0002000
370 #define LINUX_S_ISVTX 0001000
371
372 #define LINUX_S_IRWXU 00700
373 #define LINUX_S_IRUSR 00400
374 #define LINUX_S_IWUSR 00200
375 #define LINUX_S_IXUSR 00100
376
377 #define LINUX_S_IRWXG 00070
378 #define LINUX_S_IRGRP 00040
379 #define LINUX_S_IWGRP 00020
380 #define LINUX_S_IXGRP 00010
381
382 #define LINUX_S_IRWXO 00007
383 #define LINUX_S_IROTH 00004
384 #define LINUX_S_IWOTH 00002
385 #define LINUX_S_IXOTH 00001
386
387 #define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK)
388 #define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG)
389 #define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR)
390 #define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR)
391 #define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK)
392 #define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO)
393 #define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK)
394
395 /*
396 * ext2 size of an inode
397 */
398 #define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32))
399
400 /*
401 * ext2_icount_t abstraction
402 */
403 #define EXT2_ICOUNT_OPT_INCREMENT 0x01
404
405 typedef struct ext2_icount *ext2_icount_t;
406
407 /*
408 * Flags for ext2fs_bmap
409 */
410 #define BMAP_ALLOC 0x0001
411 #define BMAP_SET 0x0002
412
413 /*
414 * Flags for imager.c functions
415 */
416 #define IMAGER_FLAG_INODEMAP 1
417 #define IMAGER_FLAG_SPARSEWRITE 2
418
419 /*
420 * For checking structure magic numbers...
421 */
422
423 #define EXT2_CHECK_MAGIC(struct, code) \
424 if ((struct)->magic != (code)) return (code)
425
426
427 /*
428 * For ext2 compression support
429 */
430 #define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff)
431 #define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR)
432
433 /*
434 * Features supported by this version of the library
435 */
436 #define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\
437 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\
438 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\
439 EXT2_FEATURE_COMPAT_RESIZE_INODE|\
440 EXT2_FEATURE_COMPAT_DIR_INDEX|\
441 EXT2_FEATURE_COMPAT_LAZY_BG|\
442 EXT2_FEATURE_COMPAT_EXT_ATTR)
443
444 /* This #ifdef is temporary until compression is fully supported */
445 #ifdef ENABLE_COMPRESSION
446 #ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL
447 /* If the below warning bugs you, then have
448 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your
449 environment at configure time. */
450 #warning "Compression support is experimental"
451 #endif
452 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\
453 EXT2_FEATURE_INCOMPAT_COMPRESSION|\
454 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\
455 EXT2_FEATURE_INCOMPAT_META_BG|\
456 EXT3_FEATURE_INCOMPAT_RECOVER)
457 #else
458 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\
459 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\
460 EXT2_FEATURE_INCOMPAT_META_BG|\
461 EXT3_FEATURE_INCOMPAT_RECOVER)
462 #endif
463 #define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
464 EXT2_FEATURE_RO_COMPAT_LARGE_FILE)
465
466 /*
467 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed
468 * to ext2fs_openfs()
469 */
470 #define EXT2_LIB_SOFTSUPP_INCOMPAT (EXT3_FEATURE_INCOMPAT_EXTENTS)
471 #define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
472 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\
473 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\
474 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)
475
476 /*
477 * function prototypes
478 */
479
480 /* alloc.c */
481 extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode,
482 ext2fs_inode_bitmap map, ext2_ino_t *ret);
483 extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
484 ext2fs_block_bitmap map, blk_t *ret);
485 extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start,
486 blk_t finish, int num,
487 ext2fs_block_bitmap map,
488 blk_t *ret);
489 extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
490 char *block_buf, blk_t *ret);
491
492 /* alloc_sb.c */
493 extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
494 dgrp_t group,
495 ext2fs_block_bitmap bmap);
496
497 /* alloc_stats.c */
498 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse);
499 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
500 int inuse, int isdir);
501 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse);
502
503 /* alloc_tables.c */
504 extern errcode_t ext2fs_allocate_tables(ext2_filsys fs);
505 extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
506 ext2fs_block_bitmap bmap);
507
508 /* badblocks.c */
509 extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size);
510 extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk);
511 extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk);
512 extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk);
513 extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb,
514 ext2_u32_iterate *ret);
515 extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk);
516 extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter);
517 extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest);
518 extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2);
519
520 extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret,
521 int size);
522 extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb,
523 blk_t blk);
524 extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb,
525 blk_t blk);
526 extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk);
527 extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk);
528 extern errcode_t
529 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
530 ext2_badblocks_iterate *ret);
531 extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter,
532 blk_t *blk);
533 extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter);
534 extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
535 ext2_badblocks_list *dest);
536 extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1,
537 ext2_badblocks_list bb2);
538 extern int ext2fs_u32_list_count(ext2_u32_list bb);
539
540 /* bb_compat */
541 extern errcode_t badblocks_list_create(badblocks_list *ret, int size);
542 extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk);
543 extern int badblocks_list_test(badblocks_list bb, blk_t blk);
544 extern errcode_t badblocks_list_iterate_begin(badblocks_list bb,
545 badblocks_iterate *ret);
546 extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk);
547 extern void badblocks_list_iterate_end(badblocks_iterate iter);
548 extern void badblocks_list_free(badblocks_list bb);
549
550 /* bb_inode.c */
551 extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs,
552 ext2_badblocks_list bb_list);
553
554 /* bitmaps.c */
555 extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs);
556 extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs);
557 extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs);
558 extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs);
559 extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start,
560 __u32 end,
561 __u32 real_end,
562 const char *descr,
563 ext2fs_generic_bitmap *ret);
564 extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
565 const char *descr,
566 ext2fs_block_bitmap *ret);
567 extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
568 const char *descr,
569 ext2fs_inode_bitmap *ret);
570 extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
571 ext2_ino_t end, ext2_ino_t *oend);
572 extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
573 blk_t end, blk_t *oend);
574 extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap);
575 extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap);
576 extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs);
577 extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs);
578
579 /* block.c */
580 extern errcode_t ext2fs_block_iterate(ext2_filsys fs,
581 ext2_ino_t ino,
582 int flags,
583 char *block_buf,
584 int (*func)(ext2_filsys fs,
585 blk_t *blocknr,
586 int blockcnt,
587 void *priv_data),
588 void *priv_data);
589 errcode_t ext2fs_block_iterate2(ext2_filsys fs,
590 ext2_ino_t ino,
591 int flags,
592 char *block_buf,
593 int (*func)(ext2_filsys fs,
594 blk_t *blocknr,
595 e2_blkcnt_t blockcnt,
596 blk_t ref_blk,
597 int ref_offset,
598 void *priv_data),
599 void *priv_data);
600
601 /* bmap.c */
602 extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino,
603 struct ext2_inode *inode,
604 char *block_buf, int bmap_flags,
605 blk_t block, blk_t *phys_blk);
606
607
608 #if 0
609 /* bmove.c */
610 extern errcode_t ext2fs_move_blocks(ext2_filsys fs,
611 ext2fs_block_bitmap reserve,
612 ext2fs_block_bitmap alloc_map,
613 int flags);
614 #endif
615
616 /* check_desc.c */
617 extern errcode_t ext2fs_check_desc(ext2_filsys fs);
618
619 /* closefs.c */
620 extern errcode_t ext2fs_close(ext2_filsys fs);
621 extern errcode_t ext2fs_flush(ext2_filsys fs);
622 extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block);
623 extern int ext2fs_super_and_bgd_loc(ext2_filsys fs,
624 dgrp_t group,
625 blk_t *ret_super_blk,
626 blk_t *ret_old_desc_blk,
627 blk_t *ret_new_desc_blk,
628 int *ret_meta_bg);
629 extern void ext2fs_update_dynamic_rev(ext2_filsys fs);
630
631 /* cmp_bitmaps.c */
632 extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
633 ext2fs_block_bitmap bm2);
634 extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
635 ext2fs_inode_bitmap bm2);
636
637 /* dblist.c */
638
639 extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs);
640 extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist);
641 extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino,
642 blk_t blk, int blockcnt);
643 extern void ext2fs_dblist_sort(ext2_dblist dblist,
644 EXT2_QSORT_TYPE (*sortfunc)(const void *,
645 const void *));
646 extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist,
647 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info,
648 void *priv_data),
649 void *priv_data);
650 extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino,
651 blk_t blk, int blockcnt);
652 extern errcode_t ext2fs_copy_dblist(ext2_dblist src,
653 ext2_dblist *dest);
654 extern int ext2fs_dblist_count(ext2_dblist dblist);
655 extern errcode_t ext2fs_dblist_get_last(ext2_dblist dblist,
656 struct ext2_db_entry **entry);
657 extern errcode_t ext2fs_dblist_drop_last(ext2_dblist dblist);
658
659 /* dblist_dir.c */
660 extern errcode_t
661 ext2fs_dblist_dir_iterate(ext2_dblist dblist,
662 int flags,
663 char *block_buf,
664 int (*func)(ext2_ino_t dir,
665 int entry,
666 struct ext2_dir_entry *dirent,
667 int offset,
668 int blocksize,
669 char *buf,
670 void *priv_data),
671 void *priv_data);
672
673 /* dirblock.c */
674 extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
675 void *buf);
676 extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
677 void *buf, int flags);
678 extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
679 void *buf);
680 extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
681 void *buf, int flags);
682
683 /* dirhash.c */
684 extern errcode_t ext2fs_dirhash(int version, const char *name, int len,
685 const __u32 *seed,
686 ext2_dirhash_t *ret_hash,
687 ext2_dirhash_t *ret_minor_hash);
688
689
690 /* dir_iterate.c */
691 extern errcode_t ext2fs_dir_iterate(ext2_filsys fs,
692 ext2_ino_t dir,
693 int flags,
694 char *block_buf,
695 int (*func)(struct ext2_dir_entry *dirent,
696 int offset,
697 int blocksize,
698 char *buf,
699 void *priv_data),
700 void *priv_data);
701 extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs,
702 ext2_ino_t dir,
703 int flags,
704 char *block_buf,
705 int (*func)(ext2_ino_t dir,
706 int entry,
707 struct ext2_dir_entry *dirent,
708 int offset,
709 int blocksize,
710 char *buf,
711 void *priv_data),
712 void *priv_data);
713
714 /* dupfs.c */
715 extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest);
716
717 /* expanddir.c */
718 extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir);
719
720 /* ext_attr.c */
721 extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf);
722 extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block,
723 void *buf);
724 extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,
725 char *block_buf,
726 int adjust, __u32 *newcount);
727
728 /* fileio.c */
729 extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino,
730 struct ext2_inode *inode,
731 int flags, ext2_file_t *ret);
732 extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino,
733 int flags, ext2_file_t *ret);
734 extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file);
735 extern errcode_t ext2fs_file_close(ext2_file_t file);
736 extern errcode_t ext2fs_file_flush(ext2_file_t file);
737 extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf,
738 unsigned int wanted, unsigned int *got);
739 extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf,
740 unsigned int nbytes, unsigned int *written);
741 extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset,
742 int whence, __u64 *ret_pos);
743 extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset,
744 int whence, ext2_off_t *ret_pos);
745 errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size);
746 extern ext2_off_t ext2fs_file_get_size(ext2_file_t file);
747 extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size);
748
749 /* finddev.c */
750 extern char *ext2fs_find_block_device(dev_t device);
751
752 /* flushb.c */
753 extern errcode_t ext2fs_sync_device(int fd, int flushb);
754
755 /* freefs.c */
756 extern void ext2fs_free(ext2_filsys fs);
757 extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap);
758 extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap);
759 extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap);
760 extern void ext2fs_free_dblist(ext2_dblist dblist);
761 extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb);
762 extern void ext2fs_u32_list_free(ext2_u32_list bb);
763
764 /* getsize.c */
765 extern errcode_t ext2fs_get_device_size(const char *file, int blocksize,
766 blk_t *retblocks);
767
768 /* getsectsize.c */
769 errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize);
770
771 /* imager.c */
772 extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags);
773 extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags);
774 extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags);
775 extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags);
776 extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags);
777 extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags);
778
779 /* ind_block.c */
780 errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf);
781 errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf);
782
783 /* initialize.c */
784 extern errcode_t ext2fs_initialize(const char *name, int flags,
785 struct ext2_super_block *param,
786 io_manager manager, ext2_filsys *ret_fs);
787
788 /* icount.c */
789 extern void ext2fs_free_icount(ext2_icount_t icount);
790 extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir,
791 int flags, ext2_icount_t *ret);
792 extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags,
793 unsigned int size,
794 ext2_icount_t hint, ext2_icount_t *ret);
795 extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags,
796 unsigned int size,
797 ext2_icount_t *ret);
798 extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino,
799 __u16 *ret);
800 extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino,
801 __u16 *ret);
802 extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino,
803 __u16 *ret);
804 extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino,
805 __u16 count);
806 extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount);
807 errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *);
808
809 /* inode.c */
810 extern errcode_t ext2fs_flush_icache(ext2_filsys fs);
811 extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan,
812 ext2_ino_t *ino,
813 struct ext2_inode *inode,
814 int bufsize);
815 extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks,
816 ext2_inode_scan *ret_scan);
817 extern void ext2fs_close_inode_scan(ext2_inode_scan scan);
818 extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino,
819 struct ext2_inode *inode);
820 extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan,
821 int group);
822 extern void ext2fs_set_inode_callback
823 (ext2_inode_scan scan,
824 errcode_t (*done_group)(ext2_filsys fs,
825 ext2_inode_scan scan,
826 dgrp_t group,
827 void * priv_data),
828 void *done_group_data);
829 extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags,
830 int clear_flags);
831 extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
832 struct ext2_inode * inode,
833 int bufsize);
834 extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino,
835 struct ext2_inode * inode);
836 extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
837 struct ext2_inode * inode,
838 int bufsize);
839 extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino,
840 struct ext2_inode * inode);
841 extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino,
842 struct ext2_inode * inode);
843 extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
844 extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino);
845
846 /* inode_io.c */
847 extern io_manager inode_io_manager;
848 extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino,
849 char **name);
850 extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino,
851 struct ext2_inode *inode,
852 char **name);
853
854 /* ismounted.c */
855 extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags);
856 extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
857 char *mtpt, int mtlen);
858
859 /* namei.c */
860 extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name,
861 int namelen, char *buf, ext2_ino_t *inode);
862 extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
863 const char *name, ext2_ino_t *inode);
864 errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
865 const char *name, ext2_ino_t *inode);
866 extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
867 ext2_ino_t inode, ext2_ino_t *res_inode);
868
869 /* native.c */
870 int ext2fs_native_flag(void);
871
872 /* newdir.c */
873 extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
874 ext2_ino_t parent_ino, char **block);
875
876 /* mkdir.c */
877 extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
878 const char *name);
879
880 /* mkjournal.c */
881 extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
882 __u32 size, int flags,
883 char **ret_jsb);
884 extern errcode_t ext2fs_add_journal_device(ext2_filsys fs,
885 ext2_filsys journal_dev);
886 extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size,
887 int flags);
888 extern int ext2fs_default_journal_size(__u64 blocks);
889
890 /* openfs.c */
891 extern errcode_t ext2fs_open(const char *name, int flags, int superblock,
892 unsigned int block_size, io_manager manager,
893 ext2_filsys *ret_fs);
894 extern errcode_t ext2fs_open2(const char *name, const char *io_options,
895 int flags, int superblock,
896 unsigned int block_size, io_manager manager,
897 ext2_filsys *ret_fs);
898 extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block,
899 dgrp_t i);
900 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io);
901 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io);
902 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io);
903
904 /* get_pathname.c */
905 extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
906 char **name);
907
908 /* link.c */
909 errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name,
910 ext2_ino_t ino, int flags);
911 errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name,
912 ext2_ino_t ino, int flags);
913
914 /* read_bb.c */
915 extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs,
916 ext2_badblocks_list *bb_list);
917
918 /* read_bb_file.c */
919 extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f,
920 ext2_badblocks_list *bb_list,
921 void *priv_data,
922 void (*invalid)(ext2_filsys fs,
923 blk_t blk,
924 char *badstr,
925 void *priv_data));
926 extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f,
927 ext2_badblocks_list *bb_list,
928 void (*invalid)(ext2_filsys fs,
929 blk_t blk));
930
931 /* res_gdt.c */
932 extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs);
933
934 /* rs_bitmap.c */
935 extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end,
936 __u32 new_real_end,
937 ext2fs_generic_bitmap bmap);
938 extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
939 ext2fs_inode_bitmap bmap);
940 extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
941 ext2fs_block_bitmap bmap);
942 extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
943 ext2fs_generic_bitmap *dest);
944
945 /* swapfs.c */
946 extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize,
947 int has_header);
948 extern void ext2fs_swap_super(struct ext2_super_block * super);
949 extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp);
950 extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
951 struct ext2_inode_large *f, int hostorder,
952 int bufsize);
953 extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t,
954 struct ext2_inode *f, int hostorder);
955
956 /* valid_blk.c */
957 extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode);
958
959 /* version.c */
960 extern int ext2fs_parse_version_string(const char *ver_string);
961 extern int ext2fs_get_library_version(const char **ver_string,
962 const char **date_string);
963
964 /* write_bb_file.c */
965 extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list,
966 unsigned int flags,
967 FILE *f);
968
969
970 /* inline functions */
971 extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr);
972 extern errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr);
973 extern errcode_t ext2fs_free_mem(void *ptr);
974 extern errcode_t ext2fs_resize_mem(unsigned long old_size,
975 unsigned long size, void *ptr);
976 extern void ext2fs_mark_super_dirty(ext2_filsys fs);
977 extern void ext2fs_mark_changed(ext2_filsys fs);
978 extern int ext2fs_test_changed(ext2_filsys fs);
979 extern void ext2fs_mark_valid(ext2_filsys fs);
980 extern void ext2fs_unmark_valid(ext2_filsys fs);
981 extern int ext2fs_test_valid(ext2_filsys fs);
982 extern void ext2fs_mark_ib_dirty(ext2_filsys fs);
983 extern void ext2fs_mark_bb_dirty(ext2_filsys fs);
984 extern int ext2fs_test_ib_dirty(ext2_filsys fs);
985 extern int ext2fs_test_bb_dirty(ext2_filsys fs);
986 extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk);
987 extern int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino);
988 extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group);
989 extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group);
990 extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
991 struct ext2_inode *inode);
992 extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b);
993
994 /*
995 * The actual inlined functions definitions themselves...
996 *
997 * If NO_INLINE_FUNCS is defined, then we won't try to do inline
998 * functions at all!
999 */
1000 #if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
1001 #ifdef INCLUDE_INLINE_FUNCS
1002 #define _INLINE_ extern
1003 #else
1004 #ifdef __GNUC__
1005 #define _INLINE_ extern __inline__
1006 #else /* For Watcom C */
1007 #define _INLINE_ extern inline
1008 #endif
1009 #endif
1010
1011 #ifndef EXT2_CUSTOM_MEMORY_ROUTINES
1012 #include <string.h>
1013 /*
1014 * Allocate memory
1015 */
ext2fs_get_mem(unsigned long size,void * ptr)1016 _INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
1017 {
1018 void *pp;
1019
1020 pp = malloc(size);
1021 if (!pp)
1022 return EXT2_ET_NO_MEMORY;
1023 memcpy(ptr, &pp, sizeof (pp));
1024 return 0;
1025 }
1026
ext2fs_get_array(unsigned long count,unsigned long size,void * ptr)1027 _INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr)
1028 {
1029 if (count && (-1UL)/count<size)
1030 return EXT2_ET_NO_MEMORY; //maybe define EXT2_ET_OVERFLOW ?
1031 return ext2fs_get_mem(count*size, ptr);
1032 }
1033
1034 /*
1035 * Free memory
1036 */
ext2fs_free_mem(void * ptr)1037 _INLINE_ errcode_t ext2fs_free_mem(void *ptr)
1038 {
1039 void *p;
1040
1041 memcpy(&p, ptr, sizeof(p));
1042 free(p);
1043 p = 0;
1044 memcpy(ptr, &p, sizeof(p));
1045 return 0;
1046 }
1047
1048 /*
1049 * Resize memory
1050 */
ext2fs_resize_mem(unsigned long EXT2FS_ATTR ((unused))old_size,unsigned long size,void * ptr)1051 _INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
1052 unsigned long size, void *ptr)
1053 {
1054 void *p;
1055
1056 /* Use "memcpy" for pointer assignments here to avoid problems
1057 * with C99 strict type aliasing rules. */
1058 memcpy(&p, ptr, sizeof(p));
1059 p = realloc(p, size);
1060 if (!p)
1061 return EXT2_ET_NO_MEMORY;
1062 memcpy(ptr, &p, sizeof(p));
1063 return 0;
1064 }
1065 #endif /* Custom memory routines */
1066
1067 /*
1068 * Mark a filesystem superblock as dirty
1069 */
ext2fs_mark_super_dirty(ext2_filsys fs)1070 _INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs)
1071 {
1072 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED;
1073 }
1074
1075 /*
1076 * Mark a filesystem as changed
1077 */
ext2fs_mark_changed(ext2_filsys fs)1078 _INLINE_ void ext2fs_mark_changed(ext2_filsys fs)
1079 {
1080 fs->flags |= EXT2_FLAG_CHANGED;
1081 }
1082
1083 /*
1084 * Check to see if a filesystem has changed
1085 */
ext2fs_test_changed(ext2_filsys fs)1086 _INLINE_ int ext2fs_test_changed(ext2_filsys fs)
1087 {
1088 return (fs->flags & EXT2_FLAG_CHANGED);
1089 }
1090
1091 /*
1092 * Mark a filesystem as valid
1093 */
ext2fs_mark_valid(ext2_filsys fs)1094 _INLINE_ void ext2fs_mark_valid(ext2_filsys fs)
1095 {
1096 fs->flags |= EXT2_FLAG_VALID;
1097 }
1098
1099 /*
1100 * Mark a filesystem as NOT valid
1101 */
ext2fs_unmark_valid(ext2_filsys fs)1102 _INLINE_ void ext2fs_unmark_valid(ext2_filsys fs)
1103 {
1104 fs->flags &= ~EXT2_FLAG_VALID;
1105 }
1106
1107 /*
1108 * Check to see if a filesystem is valid
1109 */
ext2fs_test_valid(ext2_filsys fs)1110 _INLINE_ int ext2fs_test_valid(ext2_filsys fs)
1111 {
1112 return (fs->flags & EXT2_FLAG_VALID);
1113 }
1114
1115 /*
1116 * Mark the inode bitmap as dirty
1117 */
ext2fs_mark_ib_dirty(ext2_filsys fs)1118 _INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs)
1119 {
1120 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED;
1121 }
1122
1123 /*
1124 * Mark the block bitmap as dirty
1125 */
ext2fs_mark_bb_dirty(ext2_filsys fs)1126 _INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs)
1127 {
1128 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED;
1129 }
1130
1131 /*
1132 * Check to see if a filesystem's inode bitmap is dirty
1133 */
ext2fs_test_ib_dirty(ext2_filsys fs)1134 _INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs)
1135 {
1136 return (fs->flags & EXT2_FLAG_IB_DIRTY);
1137 }
1138
1139 /*
1140 * Check to see if a filesystem's block bitmap is dirty
1141 */
ext2fs_test_bb_dirty(ext2_filsys fs)1142 _INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs)
1143 {
1144 return (fs->flags & EXT2_FLAG_BB_DIRTY);
1145 }
1146
1147 /*
1148 * Return the group # of a block
1149 */
ext2fs_group_of_blk(ext2_filsys fs,blk_t blk)1150 _INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
1151 {
1152 return (blk - fs->super->s_first_data_block) /
1153 fs->super->s_blocks_per_group;
1154 }
1155
1156 /*
1157 * Return the group # of an inode number
1158 */
ext2fs_group_of_ino(ext2_filsys fs,ext2_ino_t ino)1159 _INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
1160 {
1161 return (ino - 1) / fs->super->s_inodes_per_group;
1162 }
1163
1164 /*
1165 * Return the first block (inclusive) in a group
1166 */
ext2fs_group_first_block(ext2_filsys fs,dgrp_t group)1167 _INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group)
1168 {
1169 return fs->super->s_first_data_block +
1170 (group * fs->super->s_blocks_per_group);
1171 }
1172
1173 /*
1174 * Return the last block (inclusive) in a group
1175 */
ext2fs_group_last_block(ext2_filsys fs,dgrp_t group)1176 _INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group)
1177 {
1178 return (group == fs->group_desc_count - 1 ?
1179 fs->super->s_blocks_count - 1 :
1180 ext2fs_group_first_block(fs, group) +
1181 (fs->super->s_blocks_per_group - 1));
1182 }
1183
ext2fs_inode_data_blocks(ext2_filsys fs,struct ext2_inode * inode)1184 _INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1185 struct ext2_inode *inode)
1186 {
1187 return inode->i_blocks -
1188 (inode->i_file_acl ? fs->blocksize >> 9 : 0);
1189 }
1190
1191 /*
1192 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
1193 */
ext2fs_div_ceil(unsigned int a,unsigned int b)1194 _INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b)
1195 {
1196 if (!a)
1197 return 0;
1198 return ((a - 1) / b) + 1;
1199 }
1200 #undef _INLINE_
1201 #endif
1202
1203 #ifdef __cplusplus
1204 }
1205 #endif
1206
1207 #endif /* _EXT2FS_EXT2FS_H */
1208