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 Library
8 * General Public License, version 2.
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 * Where the master copy of the superblock is located, and how big
34 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because
35 * the size of the superblock structure is not necessarily trustworthy
36 * (some versions have the padding set up so that the superblock is
37 * 1032 bytes long).
38 */
39 #define SUPERBLOCK_OFFSET 1024
40 #define SUPERBLOCK_SIZE 1024
41
42 /*
43 * The last ext2fs revision level that this version of the library is
44 * able to support.
45 */
46 #define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV
47
48 #ifdef HAVE_SYS_TYPES_H
49 #include <sys/types.h>
50 #endif
51
52 #include <stdio.h>
53 #include <stdlib.h>
54 #include <string.h>
55 #include <errno.h>
56
57 #if EXT2_FLAT_INCLUDES
58 #include "e2_types.h"
59 #include "ext2_fs.h"
60 #include "ext3_extents.h"
61 #else
62 #include <ext2fs/ext2_types.h>
63 #include <ext2fs/ext2_fs.h>
64 #include <ext2fs/ext3_extents.h>
65 #endif /* EXT2_FLAT_INCLUDES */
66
67 #ifdef __CHECK_ENDIAN__
68 #define __bitwise __attribute__((bitwise))
69 #else
70 #define __bitwise
71 #endif
72
73 typedef __u32 __bitwise ext2_ino_t;
74 typedef __u32 __bitwise blk_t;
75 typedef __u64 __bitwise blk64_t;
76 typedef __u32 __bitwise dgrp_t;
77 typedef __u32 __bitwise ext2_off_t;
78 typedef __u64 __bitwise ext2_off64_t;
79 typedef __s64 __bitwise e2_blkcnt_t;
80 typedef __u32 __bitwise 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 #include "ext2_ext_attr.h"
87 #else
88 #include <et/com_err.h>
89 #include <ext2fs/ext2_io.h>
90 #include <ext2fs/ext2_err.h>
91 #include <ext2fs/ext2_ext_attr.h>
92 #endif
93
94 /*
95 * Portability help for Microsoft Visual C++
96 */
97 #ifdef _MSC_VER
98 #define EXT2_QSORT_TYPE int __cdecl
99 #else
100 #define EXT2_QSORT_TYPE int
101 #endif
102
103 typedef struct struct_ext2_filsys *ext2_filsys;
104
105 #define EXT2FS_MARK_ERROR 0
106 #define EXT2FS_UNMARK_ERROR 1
107 #define EXT2FS_TEST_ERROR 2
108
109 typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap;
110 typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap;
111 typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap;
112
113 #define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s)
114
115
116 /*
117 * Badblocks list definitions
118 */
119
120 typedef struct ext2_struct_u32_list *ext2_badblocks_list;
121 typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate;
122
123 typedef struct ext2_struct_u32_list *ext2_u32_list;
124 typedef struct ext2_struct_u32_iterate *ext2_u32_iterate;
125
126 /* old */
127 typedef struct ext2_struct_u32_list *badblocks_list;
128 typedef struct ext2_struct_u32_iterate *badblocks_iterate;
129
130 #define BADBLOCKS_FLAG_DIRTY 1
131
132 /*
133 * ext2_dblist structure and abstractions (see dblist.c)
134 */
135 struct ext2_db_entry2 {
136 ext2_ino_t ino;
137 blk64_t blk;
138 e2_blkcnt_t blockcnt;
139 };
140
141 /* Ye Olde 32-bit version */
142 struct ext2_db_entry {
143 ext2_ino_t ino;
144 blk_t blk;
145 int blockcnt;
146 };
147
148 typedef struct ext2_struct_dblist *ext2_dblist;
149
150 #define DBLIST_ABORT 1
151
152 /*
153 * ext2_fileio definitions
154 */
155
156 #define EXT2_FILE_WRITE 0x0001
157 #define EXT2_FILE_CREATE 0x0002
158
159 #define EXT2_FILE_MASK 0x00FF
160
161 #define EXT2_FILE_BUF_DIRTY 0x4000
162 #define EXT2_FILE_BUF_VALID 0x2000
163
164 typedef struct ext2_file *ext2_file_t;
165
166 #define EXT2_SEEK_SET 0
167 #define EXT2_SEEK_CUR 1
168 #define EXT2_SEEK_END 2
169
170 /*
171 * Flags for the ext2_filsys structure and for ext2fs_open()
172 */
173 #define EXT2_FLAG_RW 0x01
174 #define EXT2_FLAG_CHANGED 0x02
175 #define EXT2_FLAG_DIRTY 0x04
176 #define EXT2_FLAG_VALID 0x08
177 #define EXT2_FLAG_IB_DIRTY 0x10
178 #define EXT2_FLAG_BB_DIRTY 0x20
179 #define EXT2_FLAG_SWAP_BYTES 0x40
180 #define EXT2_FLAG_SWAP_BYTES_READ 0x80
181 #define EXT2_FLAG_SWAP_BYTES_WRITE 0x100
182 #define EXT2_FLAG_MASTER_SB_ONLY 0x200
183 #define EXT2_FLAG_FORCE 0x400
184 #define EXT2_FLAG_SUPER_ONLY 0x800
185 #define EXT2_FLAG_JOURNAL_DEV_OK 0x1000
186 #define EXT2_FLAG_IMAGE_FILE 0x2000
187 #define EXT2_FLAG_EXCLUSIVE 0x4000
188 #define EXT2_FLAG_SOFTSUPP_FEATURES 0x8000
189 #define EXT2_FLAG_NOFREE_ON_ERROR 0x10000
190 #define EXT2_FLAG_64BITS 0x20000
191 #define EXT2_FLAG_PRINT_PROGRESS 0x40000
192 #define EXT2_FLAG_DIRECT_IO 0x80000
193 #define EXT2_FLAG_SKIP_MMP 0x100000
194
195 /*
196 * Special flag in the ext2 inode i_flag field that means that this is
197 * a new inode. (So that ext2_write_inode() can clear extra fields.)
198 */
199 #define EXT2_NEW_INODE_FL 0x80000000
200
201 /*
202 * Flags for mkjournal
203 */
204 #define EXT2_MKJOURNAL_V1_SUPER 0x0000001 /* create V1 superblock (deprecated) */
205 #define EXT2_MKJOURNAL_LAZYINIT 0x0000002 /* don't zero journal inode before use*/
206 #define EXT2_MKJOURNAL_NO_MNT_CHECK 0x0000004 /* don't check mount status */
207
208 struct opaque_ext2_group_desc;
209
210 struct struct_ext2_filsys {
211 errcode_t magic;
212 io_channel io;
213 int flags;
214 char * device_name;
215 struct ext2_super_block * super;
216 unsigned int blocksize;
217 int fragsize;
218 dgrp_t group_desc_count;
219 unsigned long desc_blocks;
220 struct opaque_ext2_group_desc * group_desc;
221 unsigned int inode_blocks_per_group;
222 ext2fs_inode_bitmap inode_map;
223 ext2fs_block_bitmap block_map;
224 /* XXX FIXME-64: not 64-bit safe, but not used? */
225 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
226 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino);
227 errcode_t (*write_bitmaps)(ext2_filsys fs);
228 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino,
229 struct ext2_inode *inode);
230 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino,
231 struct ext2_inode *inode);
232 ext2_badblocks_list badblocks;
233 ext2_dblist dblist;
234 __u32 stride; /* for mke2fs */
235 struct ext2_super_block * orig_super;
236 struct ext2_image_hdr * image_header;
237 __u32 umask;
238 time_t now;
239 int cluster_ratio_bits;
240 __u16 default_bitmap_type;
241 __u16 pad;
242 /*
243 * Reserved for future expansion
244 */
245 __u32 reserved[5];
246
247 /*
248 * Reserved for the use of the calling application.
249 */
250 void * priv_data;
251
252 /*
253 * Inode cache
254 */
255 struct ext2_inode_cache *icache;
256 io_channel image_io;
257
258 /*
259 * More callback functions
260 */
261 errcode_t (*get_alloc_block)(ext2_filsys fs, blk64_t goal,
262 blk64_t *ret);
263 void (*block_alloc_stats)(ext2_filsys fs, blk64_t blk, int inuse);
264
265 /*
266 * Buffers for Multiple mount protection(MMP) block.
267 */
268 void *mmp_buf;
269 void *mmp_cmp;
270 int mmp_fd;
271
272 /*
273 * Time at which e2fsck last updated the MMP block.
274 */
275 long mmp_last_written;
276 };
277
278 #if EXT2_FLAT_INCLUDES
279 #include "e2_bitops.h"
280 #else
281 #include <ext2fs/bitops.h>
282 #endif
283
284 /*
285 * 64-bit bitmap backend types
286 */
287 #define EXT2FS_BMAP64_BITARRAY 1
288 #define EXT2FS_BMAP64_RBTREE 2
289 #define EXT2FS_BMAP64_AUTODIR 3
290
291 /*
292 * Return flags for the block iterator functions
293 */
294 #define BLOCK_CHANGED 1
295 #define BLOCK_ABORT 2
296 #define BLOCK_ERROR 4
297
298 /*
299 * Block interate flags
300 *
301 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator
302 * function should be called on blocks where the block number is zero.
303 * This is used by ext2fs_expand_dir() to be able to add a new block
304 * to an inode. It can also be used for programs that want to be able
305 * to deal with files that contain "holes".
306 *
307 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for
308 * the indirect, doubly indirect, etc. blocks should be called after
309 * all of the blocks containined in the indirect blocks are processed.
310 * This is useful if you are going to be deallocating blocks from an
311 * inode.
312 *
313 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be
314 * called for data blocks only.
315 *
316 * BLOCK_FLAG_READ_ONLY is a promise by the caller that it will not
317 * modify returned block number.
318 *
319 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs
320 * ext2fs_block_iterate2 that large files won't be accepted.
321 */
322 #define BLOCK_FLAG_APPEND 1
323 #define BLOCK_FLAG_HOLE 1
324 #define BLOCK_FLAG_DEPTH_TRAVERSE 2
325 #define BLOCK_FLAG_DATA_ONLY 4
326 #define BLOCK_FLAG_READ_ONLY 8
327
328 #define BLOCK_FLAG_NO_LARGE 0x1000
329
330 /*
331 * Magic "block count" return values for the block iterator function.
332 */
333 #define BLOCK_COUNT_IND (-1)
334 #define BLOCK_COUNT_DIND (-2)
335 #define BLOCK_COUNT_TIND (-3)
336 #define BLOCK_COUNT_TRANSLATOR (-4)
337
338 #if 0
339 /*
340 * Flags for ext2fs_move_blocks
341 */
342 #define EXT2_BMOVE_GET_DBLIST 0x0001
343 #define EXT2_BMOVE_DEBUG 0x0002
344 #endif
345
346 /*
347 * Generic (non-filesystem layout specific) extents structure
348 */
349
350 #define EXT2_EXTENT_FLAGS_LEAF 0x0001
351 #define EXT2_EXTENT_FLAGS_UNINIT 0x0002
352 #define EXT2_EXTENT_FLAGS_SECOND_VISIT 0x0004
353
354 struct ext2fs_extent {
355 blk64_t e_pblk; /* first physical block */
356 blk64_t e_lblk; /* first logical block extent covers */
357 __u32 e_len; /* number of blocks covered by extent */
358 __u32 e_flags; /* extent flags */
359 };
360
361 typedef struct ext2_extent_handle *ext2_extent_handle_t;
362 typedef struct ext2_extent_path *ext2_extent_path_t;
363
364 /*
365 * Flags used by ext2fs_extent_get()
366 */
367 #define EXT2_EXTENT_CURRENT 0x0000
368 #define EXT2_EXTENT_MOVE_MASK 0x000F
369 #define EXT2_EXTENT_ROOT 0x0001
370 #define EXT2_EXTENT_LAST_LEAF 0x0002
371 #define EXT2_EXTENT_FIRST_SIB 0x0003
372 #define EXT2_EXTENT_LAST_SIB 0x0004
373 #define EXT2_EXTENT_NEXT_SIB 0x0005
374 #define EXT2_EXTENT_PREV_SIB 0x0006
375 #define EXT2_EXTENT_NEXT_LEAF 0x0007
376 #define EXT2_EXTENT_PREV_LEAF 0x0008
377 #define EXT2_EXTENT_NEXT 0x0009
378 #define EXT2_EXTENT_PREV 0x000A
379 #define EXT2_EXTENT_UP 0x000B
380 #define EXT2_EXTENT_DOWN 0x000C
381 #define EXT2_EXTENT_DOWN_AND_LAST 0x000D
382
383 /*
384 * Flags used by ext2fs_extent_insert()
385 */
386 #define EXT2_EXTENT_INSERT_AFTER 0x0001 /* insert after handle loc'n */
387 #define EXT2_EXTENT_INSERT_NOSPLIT 0x0002 /* insert may not cause split */
388
389 /*
390 * Flags used by ext2fs_extent_delete()
391 */
392 #define EXT2_EXTENT_DELETE_KEEP_EMPTY 0x001 /* keep node if last extnt gone */
393
394 /*
395 * Flags used by ext2fs_extent_set_bmap()
396 */
397 #define EXT2_EXTENT_SET_BMAP_UNINIT 0x0001
398
399 /*
400 * Data structure returned by ext2fs_extent_get_info()
401 */
402 struct ext2_extent_info {
403 int curr_entry;
404 int curr_level;
405 int num_entries;
406 int max_entries;
407 int max_depth;
408 int bytes_avail;
409 blk64_t max_lblk;
410 blk64_t max_pblk;
411 __u32 max_len;
412 __u32 max_uninit_len;
413 };
414
415 /*
416 * Flags for directory block reading and writing functions
417 */
418 #define EXT2_DIRBLOCK_V2_STRUCT 0x0001
419
420 /*
421 * Return flags for the directory iterator functions
422 */
423 #define DIRENT_CHANGED 1
424 #define DIRENT_ABORT 2
425 #define DIRENT_ERROR 3
426
427 /*
428 * Directory iterator flags
429 */
430
431 #define DIRENT_FLAG_INCLUDE_EMPTY 1
432 #define DIRENT_FLAG_INCLUDE_REMOVED 2
433
434 #define DIRENT_DOT_FILE 1
435 #define DIRENT_DOT_DOT_FILE 2
436 #define DIRENT_OTHER_FILE 3
437 #define DIRENT_DELETED_FILE 4
438
439 /*
440 * Inode scan definitions
441 */
442 typedef struct ext2_struct_inode_scan *ext2_inode_scan;
443
444 /*
445 * ext2fs_scan flags
446 */
447 #define EXT2_SF_CHK_BADBLOCKS 0x0001
448 #define EXT2_SF_BAD_INODE_BLK 0x0002
449 #define EXT2_SF_BAD_EXTRA_BYTES 0x0004
450 #define EXT2_SF_SKIP_MISSING_ITABLE 0x0008
451 #define EXT2_SF_DO_LAZY 0x0010
452
453 /*
454 * ext2fs_check_if_mounted flags
455 */
456 #define EXT2_MF_MOUNTED 1
457 #define EXT2_MF_ISROOT 2
458 #define EXT2_MF_READONLY 4
459 #define EXT2_MF_SWAP 8
460 #define EXT2_MF_BUSY 16
461
462 /*
463 * Ext2/linux mode flags. We define them here so that we don't need
464 * to depend on the OS's sys/stat.h, since we may be compiling on a
465 * non-Linux system.
466 */
467 #define LINUX_S_IFMT 00170000
468 #define LINUX_S_IFSOCK 0140000
469 #define LINUX_S_IFLNK 0120000
470 #define LINUX_S_IFREG 0100000
471 #define LINUX_S_IFBLK 0060000
472 #define LINUX_S_IFDIR 0040000
473 #define LINUX_S_IFCHR 0020000
474 #define LINUX_S_IFIFO 0010000
475 #define LINUX_S_ISUID 0004000
476 #define LINUX_S_ISGID 0002000
477 #define LINUX_S_ISVTX 0001000
478
479 #define LINUX_S_IRWXU 00700
480 #define LINUX_S_IRUSR 00400
481 #define LINUX_S_IWUSR 00200
482 #define LINUX_S_IXUSR 00100
483
484 #define LINUX_S_IRWXG 00070
485 #define LINUX_S_IRGRP 00040
486 #define LINUX_S_IWGRP 00020
487 #define LINUX_S_IXGRP 00010
488
489 #define LINUX_S_IRWXO 00007
490 #define LINUX_S_IROTH 00004
491 #define LINUX_S_IWOTH 00002
492 #define LINUX_S_IXOTH 00001
493
494 #define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK)
495 #define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG)
496 #define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR)
497 #define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR)
498 #define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK)
499 #define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO)
500 #define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK)
501
502 /*
503 * ext2 size of an inode
504 */
505 #define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32))
506
507 /*
508 * ext2_icount_t abstraction
509 */
510 #define EXT2_ICOUNT_OPT_INCREMENT 0x01
511
512 typedef struct ext2_icount *ext2_icount_t;
513
514 /*
515 * Flags for ext2fs_bmap
516 */
517 #define BMAP_ALLOC 0x0001
518 #define BMAP_SET 0x0002
519
520 /*
521 * Returned flags from ext2fs_bmap
522 */
523 #define BMAP_RET_UNINIT 0x0001
524
525 /*
526 * Flags for imager.c functions
527 */
528 #define IMAGER_FLAG_INODEMAP 1
529 #define IMAGER_FLAG_SPARSEWRITE 2
530
531 /*
532 * For checking structure magic numbers...
533 */
534
535 #define EXT2_CHECK_MAGIC(struct, code) \
536 if ((struct)->magic != (code)) return (code)
537
538
539 #define EXT2FS_SHA256_LENGTH 32
540 #define EXT2FS_DIGEST_SIZE EXT2FS_SHA256_LENGTH
541
542 /*
543 * For ext2 compression support
544 */
545 #define EXT2FS_COMPRESSED_BLKADDR ((blk_t) -1)
546 #define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR)
547
548 /*
549 * Features supported by this version of the library
550 */
551 #define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\
552 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\
553 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\
554 EXT2_FEATURE_COMPAT_RESIZE_INODE|\
555 EXT2_FEATURE_COMPAT_DIR_INDEX|\
556 EXT2_FEATURE_COMPAT_EXT_ATTR)
557
558 /* This #ifdef is temporary until compression is fully supported */
559 #ifdef ENABLE_COMPRESSION
560 #ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL
561 /* If the below warning bugs you, then have
562 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your
563 environment at configure time. */
564 #warning "Compression support is experimental"
565 #endif
566 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\
567 EXT2_FEATURE_INCOMPAT_COMPRESSION|\
568 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\
569 EXT2_FEATURE_INCOMPAT_META_BG|\
570 EXT3_FEATURE_INCOMPAT_RECOVER|\
571 EXT3_FEATURE_INCOMPAT_EXTENTS|\
572 EXT4_FEATURE_INCOMPAT_FLEX_BG|\
573 EXT4_FEATURE_INCOMPAT_MMP|\
574 EXT4_FEATURE_INCOMPAT_64BIT|\
575 EXT4_FEATURE_INCOMPAT_ENCRYPT)
576 #else
577 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\
578 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\
579 EXT2_FEATURE_INCOMPAT_META_BG|\
580 EXT3_FEATURE_INCOMPAT_RECOVER|\
581 EXT3_FEATURE_INCOMPAT_EXTENTS|\
582 EXT4_FEATURE_INCOMPAT_FLEX_BG|\
583 EXT4_FEATURE_INCOMPAT_MMP|\
584 EXT4_FEATURE_INCOMPAT_64BIT|\
585 EXT4_FEATURE_INCOMPAT_ENCRYPT)
586 #endif
587 #ifdef CONFIG_QUOTA
588 #define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
589 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
590 EXT2_FEATURE_RO_COMPAT_LARGE_FILE|\
591 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\
592 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|\
593 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\
594 EXT4_FEATURE_RO_COMPAT_BIGALLOC|\
595 EXT4_FEATURE_RO_COMPAT_QUOTA)
596 #else
597 #define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
598 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
599 EXT2_FEATURE_RO_COMPAT_LARGE_FILE|\
600 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\
601 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|\
602 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\
603 EXT4_FEATURE_RO_COMPAT_BIGALLOC)
604 #endif
605
606 /*
607 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed
608 * to ext2fs_openfs()
609 */
610 #define EXT2_LIB_SOFTSUPP_INCOMPAT (0)
611 #define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_REPLICA)
612
613
614 /* Translate a block number to a cluster number */
615 #define EXT2FS_CLUSTER_RATIO(fs) (1 << (fs)->cluster_ratio_bits)
616 #define EXT2FS_CLUSTER_MASK(fs) (EXT2FS_CLUSTER_RATIO(fs) - 1)
617 #define EXT2FS_B2C(fs, blk) ((blk) >> (fs)->cluster_ratio_bits)
618 /* Translate a cluster number to a block number */
619 #define EXT2FS_C2B(fs, cluster) ((cluster) << (fs)->cluster_ratio_bits)
620 /* Translate # of blks to # of clusters */
621 #define EXT2FS_NUM_B2C(fs, blks) (((blks) + EXT2FS_CLUSTER_MASK(fs)) >> \
622 (fs)->cluster_ratio_bits)
623
624 #if defined(HAVE_FSTAT64) && !defined(__OSX_AVAILABLE_BUT_DEPRECATED)
625 typedef struct stat64 ext2fs_struct_stat;
626 #else
627 typedef struct stat ext2fs_struct_stat;
628 #endif
629
630 /*
631 * For ext2fs_close2() and ext2fs_flush2(), this flag allows you to
632 * avoid the fsync call.
633 */
634 #define EXT2_FLAG_FLUSH_NO_SYNC 1
635
636 /*
637 * function prototypes
638 */
639
640 /* The LARGE_FILE feature should be set if we have stored files 2GB+ in size */
ext2fs_needs_large_file_feature(unsigned long long file_size)641 static inline int ext2fs_needs_large_file_feature(unsigned long long file_size)
642 {
643 return file_size >= 0x80000000ULL;
644 }
645
646 /* alloc.c */
647 extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode,
648 ext2fs_inode_bitmap map, ext2_ino_t *ret);
649 extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
650 ext2fs_block_bitmap map, blk_t *ret);
651 extern errcode_t ext2fs_new_block2(ext2_filsys fs, blk64_t goal,
652 ext2fs_block_bitmap map, blk64_t *ret);
653 extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start,
654 blk_t finish, int num,
655 ext2fs_block_bitmap map,
656 blk_t *ret);
657 extern errcode_t ext2fs_get_free_blocks2(ext2_filsys fs, blk64_t start,
658 blk64_t finish, int num,
659 ext2fs_block_bitmap map,
660 blk64_t *ret);
661 extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
662 char *block_buf, blk_t *ret);
663 extern errcode_t ext2fs_alloc_block2(ext2_filsys fs, blk64_t goal,
664 char *block_buf, blk64_t *ret);
665 extern void ext2fs_set_alloc_block_callback(ext2_filsys fs,
666 errcode_t (*func)(ext2_filsys fs,
667 blk64_t goal,
668 blk64_t *ret),
669 errcode_t (**old)(ext2_filsys fs,
670 blk64_t goal,
671 blk64_t *ret));
672
673 /* alloc_sb.c */
674 extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
675 dgrp_t group,
676 ext2fs_block_bitmap bmap);
677 extern void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
678 void (*func)(ext2_filsys fs,
679 blk64_t blk,
680 int inuse),
681 void (**old)(ext2_filsys fs,
682 blk64_t blk,
683 int inuse));
684
685 /* alloc_stats.c */
686 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse);
687 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
688 int inuse, int isdir);
689 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse);
690 void ext2fs_block_alloc_stats2(ext2_filsys fs, blk64_t blk, int inuse);
691
692 /* alloc_tables.c */
693 extern errcode_t ext2fs_allocate_tables(ext2_filsys fs);
694 extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
695 ext2fs_block_bitmap bmap);
696
697 /* badblocks.c */
698 extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size);
699 extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk);
700 extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk);
701 extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk);
702 extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb,
703 ext2_u32_iterate *ret);
704 extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk);
705 extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter);
706 extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest);
707 extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2);
708
709 extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret,
710 int size);
711 extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb,
712 blk_t blk);
713 extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb,
714 blk_t blk);
715 extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk);
716 extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk);
717 extern errcode_t
718 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
719 ext2_badblocks_iterate *ret);
720 extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter,
721 blk_t *blk);
722 extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter);
723 extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
724 ext2_badblocks_list *dest);
725 extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1,
726 ext2_badblocks_list bb2);
727 extern int ext2fs_u32_list_count(ext2_u32_list bb);
728
729 /* bb_compat */
730 extern errcode_t badblocks_list_create(badblocks_list *ret, int size);
731 extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk);
732 extern int badblocks_list_test(badblocks_list bb, blk_t blk);
733 extern errcode_t badblocks_list_iterate_begin(badblocks_list bb,
734 badblocks_iterate *ret);
735 extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk);
736 extern void badblocks_list_iterate_end(badblocks_iterate iter);
737 extern void badblocks_list_free(badblocks_list bb);
738
739 /* bb_inode.c */
740 extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs,
741 ext2_badblocks_list bb_list);
742
743 /* bitmaps.c */
744 extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap);
745 extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap);
746 extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
747 ext2fs_generic_bitmap *dest);
748 extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs);
749 extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs);
750 extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs);
751 extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs);
752 extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
753 const char *descr,
754 ext2fs_block_bitmap *ret);
755 extern errcode_t ext2fs_allocate_subcluster_bitmap(ext2_filsys fs,
756 const char *descr,
757 ext2fs_block_bitmap *ret);
758 extern int ext2fs_get_bitmap_granularity(ext2fs_block_bitmap bitmap);
759 extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
760 const char *descr,
761 ext2fs_inode_bitmap *ret);
762 extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
763 ext2_ino_t end, ext2_ino_t *oend);
764 extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
765 blk_t end, blk_t *oend);
766 extern errcode_t ext2fs_fudge_block_bitmap_end2(ext2fs_block_bitmap bitmap,
767 blk64_t end, blk64_t *oend);
768 extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap);
769 extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap);
770 extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs);
771 extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs);
772 extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
773 ext2fs_inode_bitmap bmap);
774 extern errcode_t ext2fs_resize_inode_bitmap2(__u64 new_end,
775 __u64 new_real_end,
776 ext2fs_inode_bitmap bmap);
777 extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
778 ext2fs_block_bitmap bmap);
779 extern errcode_t ext2fs_resize_block_bitmap2(__u64 new_end,
780 __u64 new_real_end,
781 ext2fs_block_bitmap bmap);
782 extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
783 ext2fs_block_bitmap bm2);
784 extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
785 ext2fs_inode_bitmap bm2);
786 extern errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap,
787 ext2_ino_t start, unsigned int num,
788 void *in);
789 extern errcode_t ext2fs_set_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
790 __u64 start, size_t num,
791 void *in);
792 extern errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap,
793 ext2_ino_t start, unsigned int num,
794 void *out);
795 extern errcode_t ext2fs_get_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
796 __u64 start, size_t num,
797 void *out);
798 extern errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap,
799 blk_t start, unsigned int num,
800 void *in);
801 extern errcode_t ext2fs_set_block_bitmap_range2(ext2fs_block_bitmap bmap,
802 blk64_t start, size_t num,
803 void *in);
804 extern errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap,
805 blk_t start, unsigned int num,
806 void *out);
807 extern errcode_t ext2fs_get_block_bitmap_range2(ext2fs_block_bitmap bmap,
808 blk64_t start, size_t num,
809 void *out);
810
811 /* blknum.c */
812 extern dgrp_t ext2fs_group_of_blk2(ext2_filsys fs, blk64_t);
813 extern blk64_t ext2fs_group_first_block2(ext2_filsys fs, dgrp_t group);
814 extern blk64_t ext2fs_group_last_block2(ext2_filsys fs, dgrp_t group);
815 extern int ext2fs_group_blocks_count(ext2_filsys fs, dgrp_t group);
816 extern blk64_t ext2fs_inode_data_blocks2(ext2_filsys fs,
817 struct ext2_inode *inode);
818 extern blk64_t ext2fs_inode_i_blocks(ext2_filsys fs,
819 struct ext2_inode *inode);
820 extern blk64_t ext2fs_blocks_count(struct ext2_super_block *super);
821 extern void ext2fs_blocks_count_set(struct ext2_super_block *super,
822 blk64_t blk);
823 extern void ext2fs_blocks_count_add(struct ext2_super_block *super,
824 blk64_t blk);
825 extern blk64_t ext2fs_r_blocks_count(struct ext2_super_block *super);
826 extern void ext2fs_r_blocks_count_set(struct ext2_super_block *super,
827 blk64_t blk);
828 extern void ext2fs_r_blocks_count_add(struct ext2_super_block *super,
829 blk64_t blk);
830 extern blk64_t ext2fs_free_blocks_count(struct ext2_super_block *super);
831 extern void ext2fs_free_blocks_count_set(struct ext2_super_block *super,
832 blk64_t blk);
833 extern void ext2fs_free_blocks_count_add(struct ext2_super_block *super,
834 blk64_t blk);
835 /* Block group descriptor accessor functions */
836 extern struct ext2_group_desc *ext2fs_group_desc(ext2_filsys fs,
837 struct opaque_ext2_group_desc *gdp,
838 dgrp_t group);
839 extern blk64_t ext2fs_block_bitmap_loc(ext2_filsys fs, dgrp_t group);
840 extern void ext2fs_block_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
841 blk64_t blk);
842 extern blk64_t ext2fs_inode_bitmap_loc(ext2_filsys fs, dgrp_t group);
843 extern void ext2fs_inode_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
844 blk64_t blk);
845 extern blk64_t ext2fs_inode_table_loc(ext2_filsys fs, dgrp_t group);
846 extern void ext2fs_inode_table_loc_set(ext2_filsys fs, dgrp_t group,
847 blk64_t blk);
848 extern __u32 ext2fs_bg_free_blocks_count(ext2_filsys fs, dgrp_t group);
849 extern void ext2fs_bg_free_blocks_count_set(ext2_filsys fs, dgrp_t group,
850 __u32 n);
851 extern __u32 ext2fs_bg_free_inodes_count(ext2_filsys fs, dgrp_t group);
852 extern void ext2fs_bg_free_inodes_count_set(ext2_filsys fs, dgrp_t group,
853 __u32 n);
854 extern __u32 ext2fs_bg_used_dirs_count(ext2_filsys fs, dgrp_t group);
855 extern void ext2fs_bg_used_dirs_count_set(ext2_filsys fs, dgrp_t group,
856 __u32 n);
857 extern __u32 ext2fs_bg_itable_unused(ext2_filsys fs, dgrp_t group);
858 extern void ext2fs_bg_itable_unused_set(ext2_filsys fs, dgrp_t group,
859 __u32 n);
860 extern __u16 ext2fs_bg_flags(ext2_filsys fs, dgrp_t group);
861 extern void ext2fs_bg_flags_zap(ext2_filsys fs, dgrp_t group);
862 extern int ext2fs_bg_flags_test(ext2_filsys fs, dgrp_t group, __u16 bg_flag);
863 extern void ext2fs_bg_flags_set(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
864 extern void ext2fs_bg_flags_clear(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
865 extern __u16 ext2fs_bg_checksum(ext2_filsys fs, dgrp_t group);
866 extern void ext2fs_bg_checksum_set(ext2_filsys fs, dgrp_t group, __u16 checksum);
867 extern blk64_t ext2fs_file_acl_block(ext2_filsys fs,
868 const struct ext2_inode *inode);
869 extern void ext2fs_file_acl_block_set(ext2_filsys fs,
870 struct ext2_inode *inode, blk64_t blk);
871
872 /* block.c */
873 extern errcode_t ext2fs_block_iterate(ext2_filsys fs,
874 ext2_ino_t ino,
875 int flags,
876 char *block_buf,
877 int (*func)(ext2_filsys fs,
878 blk_t *blocknr,
879 int blockcnt,
880 void *priv_data),
881 void *priv_data);
882 errcode_t ext2fs_block_iterate2(ext2_filsys fs,
883 ext2_ino_t ino,
884 int flags,
885 char *block_buf,
886 int (*func)(ext2_filsys fs,
887 blk_t *blocknr,
888 e2_blkcnt_t blockcnt,
889 blk_t ref_blk,
890 int ref_offset,
891 void *priv_data),
892 void *priv_data);
893 errcode_t ext2fs_block_iterate3(ext2_filsys fs,
894 ext2_ino_t ino,
895 int flags,
896 char *block_buf,
897 int (*func)(ext2_filsys fs,
898 blk64_t *blocknr,
899 e2_blkcnt_t blockcnt,
900 blk64_t ref_blk,
901 int ref_offset,
902 void *priv_data),
903 void *priv_data);
904
905 /* bmap.c */
906 extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino,
907 struct ext2_inode *inode,
908 char *block_buf, int bmap_flags,
909 blk_t block, blk_t *phys_blk);
910 extern errcode_t ext2fs_bmap2(ext2_filsys fs, ext2_ino_t ino,
911 struct ext2_inode *inode,
912 char *block_buf, int bmap_flags, blk64_t block,
913 int *ret_flags, blk64_t *phys_blk);
914 errcode_t ext2fs_map_cluster_block(ext2_filsys fs, ext2_ino_t ino,
915 struct ext2_inode *inode, blk64_t lblk,
916 blk64_t *pblk);
917
918 #if 0
919 /* bmove.c */
920 extern errcode_t ext2fs_move_blocks(ext2_filsys fs,
921 ext2fs_block_bitmap reserve,
922 ext2fs_block_bitmap alloc_map,
923 int flags);
924 #endif
925
926 /* check_desc.c */
927 extern errcode_t ext2fs_check_desc(ext2_filsys fs);
928
929 /* closefs.c */
930 extern errcode_t ext2fs_close(ext2_filsys fs);
931 extern errcode_t ext2fs_close2(ext2_filsys fs, int flags);
932 extern errcode_t ext2fs_flush(ext2_filsys fs);
933 extern errcode_t ext2fs_flush2(ext2_filsys fs, int flags);
934 extern int ext2fs_bg_has_super(ext2_filsys fs, dgrp_t group_block);
935 extern errcode_t ext2fs_super_and_bgd_loc2(ext2_filsys fs,
936 dgrp_t group,
937 blk64_t *ret_super_blk,
938 blk64_t *ret_old_desc_blk,
939 blk64_t *ret_new_desc_blk,
940 blk_t *ret_used_blks);
941 extern int ext2fs_super_and_bgd_loc(ext2_filsys fs,
942 dgrp_t group,
943 blk_t *ret_super_blk,
944 blk_t *ret_old_desc_blk,
945 blk_t *ret_new_desc_blk,
946 int *ret_meta_bg);
947 extern void ext2fs_update_dynamic_rev(ext2_filsys fs);
948
949 /* crc32c.c */
950 extern __u32 ext2fs_crc32c_be(__u32 crc, unsigned char const *p, size_t len);
951 extern __u32 ext2fs_crc32c_le(__u32 crc, unsigned char const *p, size_t len);
952
953 /* csum.c */
954 extern void ext2fs_group_desc_csum_set(ext2_filsys fs, dgrp_t group);
955 extern int ext2fs_group_desc_csum_verify(ext2_filsys fs, dgrp_t group);
956 extern errcode_t ext2fs_set_gdt_csum(ext2_filsys fs);
957 extern __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group);
958
959 /* dblist.c */
960
961 extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs);
962 extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist);
963 extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino,
964 blk_t blk, int blockcnt);
965 extern errcode_t ext2fs_add_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
966 blk64_t blk, e2_blkcnt_t blockcnt);
967 extern void ext2fs_dblist_sort(ext2_dblist dblist,
968 EXT2_QSORT_TYPE (*sortfunc)(const void *,
969 const void *));
970 extern void ext2fs_dblist_sort2(ext2_dblist dblist,
971 EXT2_QSORT_TYPE (*sortfunc)(const void *,
972 const void *));
973 extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist,
974 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info,
975 void *priv_data),
976 void *priv_data);
977 extern errcode_t ext2fs_dblist_iterate2(ext2_dblist dblist,
978 int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info,
979 void *priv_data),
980 void *priv_data);
981 extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino,
982 blk_t blk, int blockcnt);
983 extern errcode_t ext2fs_set_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
984 blk64_t blk, e2_blkcnt_t blockcnt);
985 extern errcode_t ext2fs_copy_dblist(ext2_dblist src,
986 ext2_dblist *dest);
987 extern int ext2fs_dblist_count(ext2_dblist dblist);
988 extern blk64_t ext2fs_dblist_count2(ext2_dblist dblist);
989 extern errcode_t ext2fs_dblist_get_last(ext2_dblist dblist,
990 struct ext2_db_entry **entry);
991 extern errcode_t ext2fs_dblist_get_last2(ext2_dblist dblist,
992 struct ext2_db_entry2 **entry);
993 extern errcode_t ext2fs_dblist_drop_last(ext2_dblist dblist);
994
995 /* dblist_dir.c */
996 extern errcode_t
997 ext2fs_dblist_dir_iterate(ext2_dblist dblist,
998 int flags,
999 char *block_buf,
1000 int (*func)(ext2_ino_t dir,
1001 int entry,
1002 struct ext2_dir_entry *dirent,
1003 int offset,
1004 int blocksize,
1005 char *buf,
1006 void *priv_data),
1007 void *priv_data);
1008
1009 /* dirblock.c */
1010 extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
1011 void *buf);
1012 extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
1013 void *buf, int flags);
1014 extern errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block,
1015 void *buf, int flags);
1016 extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
1017 void *buf);
1018 extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
1019 void *buf, int flags);
1020 extern errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block,
1021 void *buf, int flags);
1022
1023 /* dirhash.c */
1024 extern errcode_t ext2fs_dirhash(int version, const char *name, int len,
1025 const __u32 *seed,
1026 ext2_dirhash_t *ret_hash,
1027 ext2_dirhash_t *ret_minor_hash);
1028
1029
1030 /* dir_iterate.c */
1031 extern errcode_t ext2fs_get_rec_len(ext2_filsys fs,
1032 struct ext2_dir_entry *dirent,
1033 unsigned int *rec_len);
1034 extern errcode_t ext2fs_set_rec_len(ext2_filsys fs,
1035 unsigned int len,
1036 struct ext2_dir_entry *dirent);
1037 extern errcode_t ext2fs_dir_iterate(ext2_filsys fs,
1038 ext2_ino_t dir,
1039 int flags,
1040 char *block_buf,
1041 int (*func)(struct ext2_dir_entry *dirent,
1042 int offset,
1043 int blocksize,
1044 char *buf,
1045 void *priv_data),
1046 void *priv_data);
1047 extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs,
1048 ext2_ino_t dir,
1049 int flags,
1050 char *block_buf,
1051 int (*func)(ext2_ino_t dir,
1052 int entry,
1053 struct ext2_dir_entry *dirent,
1054 int offset,
1055 int blocksize,
1056 char *buf,
1057 void *priv_data),
1058 void *priv_data);
1059
1060 /* dupfs.c */
1061 extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest);
1062
1063 /* expanddir.c */
1064 extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir);
1065
1066 /* ext_attr.c */
1067 extern __u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry,
1068 void *data);
1069 extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf);
1070 extern errcode_t ext2fs_read_ext_attr2(ext2_filsys fs, blk64_t block,
1071 void *buf);
1072 extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block,
1073 void *buf);
1074 extern errcode_t ext2fs_write_ext_attr2(ext2_filsys fs, blk64_t block,
1075 void *buf);
1076 extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,
1077 char *block_buf,
1078 int adjust, __u32 *newcount);
1079 extern errcode_t ext2fs_adjust_ea_refcount2(ext2_filsys fs, blk64_t blk,
1080 char *block_buf,
1081 int adjust, __u32 *newcount);
1082
1083 /* extent.c */
1084 extern errcode_t ext2fs_extent_header_verify(void *ptr, int size);
1085 extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino,
1086 ext2_extent_handle_t *handle);
1087 extern errcode_t ext2fs_extent_open2(ext2_filsys fs, ext2_ino_t ino,
1088 struct ext2_inode *inode,
1089 ext2_extent_handle_t *ret_handle);
1090 extern void ext2fs_extent_free(ext2_extent_handle_t handle);
1091 extern errcode_t ext2fs_extent_get(ext2_extent_handle_t handle,
1092 int flags, struct ext2fs_extent *extent);
1093 extern errcode_t ext2fs_extent_node_split(ext2_extent_handle_t handle);
1094 extern errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle, int flags,
1095 struct ext2fs_extent *extent);
1096 extern errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags,
1097 struct ext2fs_extent *extent);
1098 extern errcode_t ext2fs_extent_set_bmap(ext2_extent_handle_t handle,
1099 blk64_t logical, blk64_t physical,
1100 int flags);
1101 extern errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags);
1102 extern errcode_t ext2fs_extent_get_info(ext2_extent_handle_t handle,
1103 struct ext2_extent_info *info);
1104 extern errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle,
1105 blk64_t blk);
1106 extern errcode_t ext2fs_extent_goto2(ext2_extent_handle_t handle,
1107 int leaf_level, blk64_t blk);
1108 extern errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle);
1109
1110 /* fileio.c */
1111 extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino,
1112 struct ext2_inode *inode,
1113 int flags, ext2_file_t *ret);
1114 extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino,
1115 int flags, ext2_file_t *ret);
1116 extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file);
1117 struct ext2_inode *ext2fs_file_get_inode(ext2_file_t file);
1118 extern ext2_ino_t ext2fs_file_get_inode_num(ext2_file_t file);
1119 extern errcode_t ext2fs_file_close(ext2_file_t file);
1120 extern errcode_t ext2fs_file_flush(ext2_file_t file);
1121 extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf,
1122 unsigned int wanted, unsigned int *got);
1123 extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf,
1124 unsigned int nbytes, unsigned int *written);
1125 extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset,
1126 int whence, __u64 *ret_pos);
1127 extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset,
1128 int whence, ext2_off_t *ret_pos);
1129 errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size);
1130 extern ext2_off_t ext2fs_file_get_size(ext2_file_t file);
1131 extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size);
1132 extern errcode_t ext2fs_file_set_size2(ext2_file_t file, ext2_off64_t size);
1133
1134 /* finddev.c */
1135 extern char *ext2fs_find_block_device(dev_t device);
1136
1137 /* flushb.c */
1138 extern errcode_t ext2fs_sync_device(int fd, int flushb);
1139
1140 /* freefs.c */
1141 extern void ext2fs_free(ext2_filsys fs);
1142 extern void ext2fs_free_dblist(ext2_dblist dblist);
1143 extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb);
1144 extern void ext2fs_u32_list_free(ext2_u32_list bb);
1145
1146 /* gen_bitmap.c */
1147 extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap);
1148 extern errcode_t ext2fs_make_generic_bitmap(errcode_t magic, ext2_filsys fs,
1149 __u32 start, __u32 end,
1150 __u32 real_end,
1151 const char *descr, char *init_map,
1152 ext2fs_generic_bitmap *ret);
1153 extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start,
1154 __u32 end,
1155 __u32 real_end,
1156 const char *descr,
1157 ext2fs_generic_bitmap *ret);
1158 extern errcode_t ext2fs_copy_generic_bitmap(ext2fs_generic_bitmap src,
1159 ext2fs_generic_bitmap *dest);
1160 extern void ext2fs_clear_generic_bitmap(ext2fs_generic_bitmap bitmap);
1161 extern errcode_t ext2fs_fudge_generic_bitmap_end(ext2fs_inode_bitmap bitmap,
1162 errcode_t magic,
1163 errcode_t neq,
1164 ext2_ino_t end,
1165 ext2_ino_t *oend);
1166 extern void ext2fs_set_generic_bitmap_padding(ext2fs_generic_bitmap map);
1167 extern errcode_t ext2fs_resize_generic_bitmap(errcode_t magic,
1168 __u32 new_end,
1169 __u32 new_real_end,
1170 ext2fs_generic_bitmap bmap);
1171 extern errcode_t ext2fs_compare_generic_bitmap(errcode_t magic, errcode_t neq,
1172 ext2fs_generic_bitmap bm1,
1173 ext2fs_generic_bitmap bm2);
1174 extern errcode_t ext2fs_get_generic_bitmap_range(ext2fs_generic_bitmap bmap,
1175 errcode_t magic,
1176 __u32 start, __u32 num,
1177 void *out);
1178 extern errcode_t ext2fs_set_generic_bitmap_range(ext2fs_generic_bitmap bmap,
1179 errcode_t magic,
1180 __u32 start, __u32 num,
1181 void *in);
1182 extern errcode_t ext2fs_find_first_zero_generic_bitmap(ext2fs_generic_bitmap bitmap,
1183 __u32 start, __u32 end,
1184 __u32 *out);
1185
1186 /* gen_bitmap64.c */
1187
1188 /* Generate and print bitmap usage statistics */
1189 #define BMAP_STATS
1190
1191 void ext2fs_free_generic_bmap(ext2fs_generic_bitmap bmap);
1192 errcode_t ext2fs_alloc_generic_bmap(ext2_filsys fs, errcode_t magic,
1193 int type, __u64 start, __u64 end,
1194 __u64 real_end,
1195 const char *descr,
1196 ext2fs_generic_bitmap *ret);
1197 errcode_t ext2fs_copy_generic_bmap(ext2fs_generic_bitmap src,
1198 ext2fs_generic_bitmap *dest);
1199 void ext2fs_clear_generic_bmap(ext2fs_generic_bitmap bitmap);
1200 errcode_t ext2fs_fudge_generic_bmap_end(ext2fs_generic_bitmap bitmap,
1201 errcode_t neq,
1202 __u64 end, __u64 *oend);
1203 void ext2fs_set_generic_bmap_padding(ext2fs_generic_bitmap bmap);
1204 errcode_t ext2fs_resize_generic_bmap(ext2fs_generic_bitmap bmap,
1205 __u64 new_end,
1206 __u64 new_real_end);
1207 errcode_t ext2fs_compare_generic_bmap(errcode_t neq,
1208 ext2fs_generic_bitmap bm1,
1209 ext2fs_generic_bitmap bm2);
1210 errcode_t ext2fs_get_generic_bmap_range(ext2fs_generic_bitmap bmap,
1211 __u64 start, unsigned int num,
1212 void *out);
1213 errcode_t ext2fs_set_generic_bmap_range(ext2fs_generic_bitmap bmap,
1214 __u64 start, unsigned int num,
1215 void *in);
1216 errcode_t ext2fs_convert_subcluster_bitmap(ext2_filsys fs,
1217 ext2fs_block_bitmap *bitmap);
1218
1219 /* getsize.c */
1220 extern errcode_t ext2fs_get_device_size(const char *file, int blocksize,
1221 blk_t *retblocks);
1222 extern errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
1223 blk64_t *retblocks);
1224
1225 /* getsectsize.c */
1226 extern int ext2fs_get_dio_alignment(int fd);
1227 errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize);
1228 errcode_t ext2fs_get_device_phys_sectsize(const char *file, int *sectsize);
1229
1230 /* i_block.c */
1231 errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
1232 blk64_t num_blocks);
1233 errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode,
1234 blk64_t num_blocks);
1235 errcode_t ext2fs_iblk_set(ext2_filsys fs, struct ext2_inode *inode, blk64_t b);
1236
1237 /* imager.c */
1238 extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags);
1239 extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags);
1240 extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags);
1241 extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags);
1242 extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags);
1243 extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags);
1244
1245 /* ind_block.c */
1246 errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf);
1247 errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf);
1248
1249 /* initialize.c */
1250 extern errcode_t ext2fs_initialize(const char *name, int flags,
1251 struct ext2_super_block *param,
1252 io_manager manager, ext2_filsys *ret_fs);
1253
1254 /* icount.c */
1255 extern void ext2fs_free_icount(ext2_icount_t icount);
1256 extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir,
1257 int flags, ext2_icount_t *ret);
1258 extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags,
1259 unsigned int size,
1260 ext2_icount_t hint, ext2_icount_t *ret);
1261 extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags,
1262 unsigned int size,
1263 ext2_icount_t *ret);
1264 extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino,
1265 __u16 *ret);
1266 extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino,
1267 __u16 *ret);
1268 extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino,
1269 __u16 *ret);
1270 extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino,
1271 __u16 count);
1272 extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount);
1273 errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *);
1274
1275 /* inline.c */
1276
1277 extern errcode_t ext2fs_get_memalign(unsigned long size,
1278 unsigned long align, void *ptr);
1279
1280 /* inode.c */
1281 extern errcode_t ext2fs_flush_icache(ext2_filsys fs);
1282 extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan,
1283 ext2_ino_t *ino,
1284 struct ext2_inode *inode,
1285 int bufsize);
1286 extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks,
1287 ext2_inode_scan *ret_scan);
1288 extern void ext2fs_close_inode_scan(ext2_inode_scan scan);
1289 extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino,
1290 struct ext2_inode *inode);
1291 extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan,
1292 int group);
1293 extern void ext2fs_set_inode_callback
1294 (ext2_inode_scan scan,
1295 errcode_t (*done_group)(ext2_filsys fs,
1296 ext2_inode_scan scan,
1297 dgrp_t group,
1298 void * priv_data),
1299 void *done_group_data);
1300 extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags,
1301 int clear_flags);
1302 extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
1303 struct ext2_inode * inode,
1304 int bufsize);
1305 extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino,
1306 struct ext2_inode * inode);
1307 extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
1308 struct ext2_inode * inode,
1309 int bufsize);
1310 extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino,
1311 struct ext2_inode * inode);
1312 extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino,
1313 struct ext2_inode * inode);
1314 extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
1315 extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino);
1316
1317 /* inode_io.c */
1318 extern io_manager inode_io_manager;
1319 extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino,
1320 char **name);
1321 extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino,
1322 struct ext2_inode *inode,
1323 char **name);
1324
1325 /* ismounted.c */
1326 extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags);
1327 extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
1328 char *mtpt, int mtlen);
1329
1330 /* punch.c */
1331 /*
1332 * NOTE: This function removes from an inode the blocks "start", "end", and
1333 * every block in between.
1334 */
1335 extern errcode_t ext2fs_punch(ext2_filsys fs, ext2_ino_t ino,
1336 struct ext2_inode *inode,
1337 char *block_buf, blk64_t start,
1338 blk64_t end);
1339
1340 /* namei.c */
1341 extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name,
1342 int namelen, char *buf, ext2_ino_t *inode);
1343 extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1344 const char *name, ext2_ino_t *inode);
1345 errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1346 const char *name, ext2_ino_t *inode);
1347 extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1348 ext2_ino_t inode, ext2_ino_t *res_inode);
1349
1350 /* native.c */
1351 int ext2fs_native_flag(void);
1352
1353 /* newdir.c */
1354 extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
1355 ext2_ino_t parent_ino, char **block);
1356
1357 /* mkdir.c */
1358 extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
1359 const char *name);
1360
1361 /* mkjournal.c */
1362 extern errcode_t ext2fs_zero_blocks(ext2_filsys fs, blk_t blk, int num,
1363 blk_t *ret_blk, int *ret_count);
1364 extern errcode_t ext2fs_zero_blocks2(ext2_filsys fs, blk64_t blk, int num,
1365 blk64_t *ret_blk, int *ret_count);
1366 extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
1367 __u32 num_blocks, int flags,
1368 char **ret_jsb);
1369 extern errcode_t ext2fs_add_journal_device(ext2_filsys fs,
1370 ext2_filsys journal_dev);
1371 extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t num_blocks,
1372 int flags);
1373 extern int ext2fs_default_journal_size(__u64 num_blocks);
1374
1375 /* openfs.c */
1376 extern errcode_t ext2fs_open(const char *name, int flags, int superblock,
1377 unsigned int block_size, io_manager manager,
1378 ext2_filsys *ret_fs);
1379 extern errcode_t ext2fs_open2(const char *name, const char *io_options,
1380 int flags, int superblock,
1381 unsigned int block_size, io_manager manager,
1382 ext2_filsys *ret_fs);
1383 extern blk64_t ext2fs_descriptor_block_loc2(ext2_filsys fs,
1384 blk64_t group_block, dgrp_t i);
1385 extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block,
1386 dgrp_t i);
1387 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io);
1388 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io);
1389 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io);
1390
1391 /* get_pathname.c */
1392 extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
1393 char **name);
1394
1395 /* link.c */
1396 errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name,
1397 ext2_ino_t ino, int flags);
1398 errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name,
1399 ext2_ino_t ino, int flags);
1400
1401 /* symlink.c */
1402 errcode_t ext2fs_symlink(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t ino,
1403 const char *name, char *target);
1404
1405 /* mmp.c */
1406 errcode_t ext2fs_mmp_read(ext2_filsys fs, blk64_t mmp_blk, void *buf);
1407 errcode_t ext2fs_mmp_write(ext2_filsys fs, blk64_t mmp_blk, void *buf);
1408 errcode_t ext2fs_mmp_clear(ext2_filsys fs);
1409 errcode_t ext2fs_mmp_init(ext2_filsys fs);
1410 errcode_t ext2fs_mmp_start(ext2_filsys fs);
1411 errcode_t ext2fs_mmp_update(ext2_filsys fs);
1412 errcode_t ext2fs_mmp_stop(ext2_filsys fs);
1413 unsigned ext2fs_mmp_new_seq(void);
1414
1415 /* read_bb.c */
1416 extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs,
1417 ext2_badblocks_list *bb_list);
1418
1419 /* read_bb_file.c */
1420 extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f,
1421 ext2_badblocks_list *bb_list,
1422 void *priv_data,
1423 void (*invalid)(ext2_filsys fs,
1424 blk_t blk,
1425 char *badstr,
1426 void *priv_data));
1427 extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f,
1428 ext2_badblocks_list *bb_list,
1429 void (*invalid)(ext2_filsys fs,
1430 blk_t blk));
1431
1432 /* res_gdt.c */
1433 extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs);
1434
1435 /* swapfs.c */
1436 extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize,
1437 int has_header);
1438 extern void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
1439 struct ext2_ext_attr_header *from_hdr);
1440 extern void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
1441 struct ext2_ext_attr_entry *from_entry);
1442 extern void ext2fs_swap_super(struct ext2_super_block * super);
1443 extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp);
1444 extern void ext2fs_swap_group_desc2(ext2_filsys, struct ext2_group_desc *gdp);
1445 extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
1446 struct ext2_inode_large *f, int hostorder,
1447 int bufsize);
1448 extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t,
1449 struct ext2_inode *f, int hostorder);
1450 extern void ext2fs_swap_mmp(struct mmp_struct *mmp);
1451
1452 /* unix_io.c */
1453 extern int ext2fs_open_file(const char *pathname, int flags, mode_t mode);
1454 extern int ext2fs_stat(const char *path, ext2fs_struct_stat *buf);
1455 extern int ext2fs_fstat(int fd, ext2fs_struct_stat *buf);
1456
1457 /* valid_blk.c */
1458 extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode);
1459 extern int ext2fs_inode_has_valid_blocks2(ext2_filsys fs,
1460 struct ext2_inode *inode);
1461
1462 /* version.c */
1463 extern int ext2fs_parse_version_string(const char *ver_string);
1464 extern int ext2fs_get_library_version(const char **ver_string,
1465 const char **date_string);
1466
1467 /* write_bb_file.c */
1468 extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list,
1469 unsigned int flags,
1470 FILE *f);
1471
1472
1473 /* inline functions */
1474 #ifdef NO_INLINE_FUNCS
1475 extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr);
1476 extern errcode_t ext2fs_get_memzero(unsigned long size, void *ptr);
1477 extern errcode_t ext2fs_get_array(unsigned long count,
1478 unsigned long size, void *ptr);
1479 extern errcode_t ext2fs_get_arrayzero(unsigned long count,
1480 unsigned long size, void *ptr);
1481 extern errcode_t ext2fs_free_mem(void *ptr);
1482 extern errcode_t ext2fs_resize_mem(unsigned long old_size,
1483 unsigned long size, void *ptr);
1484 extern void ext2fs_mark_super_dirty(ext2_filsys fs);
1485 extern void ext2fs_mark_changed(ext2_filsys fs);
1486 extern int ext2fs_test_changed(ext2_filsys fs);
1487 extern void ext2fs_mark_valid(ext2_filsys fs);
1488 extern void ext2fs_unmark_valid(ext2_filsys fs);
1489 extern int ext2fs_test_valid(ext2_filsys fs);
1490 extern void ext2fs_mark_ib_dirty(ext2_filsys fs);
1491 extern void ext2fs_mark_bb_dirty(ext2_filsys fs);
1492 extern int ext2fs_test_ib_dirty(ext2_filsys fs);
1493 extern int ext2fs_test_bb_dirty(ext2_filsys fs);
1494 extern dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk);
1495 extern dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino);
1496 extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group);
1497 extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group);
1498 extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1499 struct ext2_inode *inode);
1500 extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b);
1501 extern __u64 ext2fs_div64_ceil(__u64 a, __u64 b);
1502 #endif
1503
1504 /*
1505 * The actual inlined functions definitions themselves...
1506 *
1507 * If NO_INLINE_FUNCS is defined, then we won't try to do inline
1508 * functions at all!
1509 */
1510 #if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
1511 #ifdef INCLUDE_INLINE_FUNCS
1512 #define _INLINE_ extern
1513 #else
1514 #if (__STDC_VERSION__ >= 199901L)
1515 #define _INLINE_ inline
1516 #else
1517 #ifdef __GNUC__
1518 #define _INLINE_ extern __inline__
1519 #else /* For Watcom C */
1520 #define _INLINE_ extern inline
1521 #endif /* __GNUC__ */
1522 #endif /* __STDC_VERSION__ >= 199901L */
1523 #endif
1524
1525 #ifndef EXT2_CUSTOM_MEMORY_ROUTINES
1526 #include <string.h>
1527 /*
1528 * Allocate memory. The 'ptr' arg must point to a pointer.
1529 */
ext2fs_get_mem(unsigned long size,void * ptr)1530 _INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
1531 {
1532 void *pp;
1533
1534 pp = malloc(size);
1535 if (!pp)
1536 return EXT2_ET_NO_MEMORY;
1537 memcpy(ptr, &pp, sizeof (pp));
1538 return 0;
1539 }
1540
ext2fs_get_memzero(unsigned long size,void * ptr)1541 _INLINE_ errcode_t ext2fs_get_memzero(unsigned long size, void *ptr)
1542 {
1543 void *pp;
1544
1545 pp = malloc(size);
1546 if (!pp)
1547 return EXT2_ET_NO_MEMORY;
1548 memset(pp, 0, size);
1549 memcpy(ptr, &pp, sizeof(pp));
1550 return 0;
1551 }
1552
ext2fs_get_array(unsigned long count,unsigned long size,void * ptr)1553 _INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr)
1554 {
1555 if (count && (-1UL)/count<size)
1556 return EXT2_ET_NO_MEMORY;
1557 return ext2fs_get_mem(count*size, ptr);
1558 }
1559
ext2fs_get_arrayzero(unsigned long count,unsigned long size,void * ptr)1560 _INLINE_ errcode_t ext2fs_get_arrayzero(unsigned long count,
1561 unsigned long size, void *ptr)
1562 {
1563 void *pp;
1564
1565 if (count && (-1UL)/count<size)
1566 return EXT2_ET_NO_MEMORY;
1567 pp = calloc(count, size);
1568 if (!pp)
1569 return EXT2_ET_NO_MEMORY;
1570 memcpy(ptr, &pp, sizeof(pp));
1571 return 0;
1572 }
1573
1574 /*
1575 * Free memory. The 'ptr' arg must point to a pointer.
1576 */
ext2fs_free_mem(void * ptr)1577 _INLINE_ errcode_t ext2fs_free_mem(void *ptr)
1578 {
1579 void *p;
1580
1581 memcpy(&p, ptr, sizeof(p));
1582 free(p);
1583 p = 0;
1584 memcpy(ptr, &p, sizeof(p));
1585 return 0;
1586 }
1587
1588 /*
1589 * Resize memory. The 'ptr' arg must point to a pointer.
1590 */
ext2fs_resize_mem(unsigned long EXT2FS_ATTR ((unused))old_size,unsigned long size,void * ptr)1591 _INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
1592 unsigned long size, void *ptr)
1593 {
1594 void *p;
1595
1596 /* Use "memcpy" for pointer assignments here to avoid problems
1597 * with C99 strict type aliasing rules. */
1598 memcpy(&p, ptr, sizeof(p));
1599 p = realloc(p, size);
1600 if (!p)
1601 return EXT2_ET_NO_MEMORY;
1602 memcpy(ptr, &p, sizeof(p));
1603 return 0;
1604 }
1605 #endif /* Custom memory routines */
1606
1607 /*
1608 * Mark a filesystem superblock as dirty
1609 */
ext2fs_mark_super_dirty(ext2_filsys fs)1610 _INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs)
1611 {
1612 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED;
1613 }
1614
1615 /*
1616 * Mark a filesystem as changed
1617 */
ext2fs_mark_changed(ext2_filsys fs)1618 _INLINE_ void ext2fs_mark_changed(ext2_filsys fs)
1619 {
1620 fs->flags |= EXT2_FLAG_CHANGED;
1621 }
1622
1623 /*
1624 * Check to see if a filesystem has changed
1625 */
ext2fs_test_changed(ext2_filsys fs)1626 _INLINE_ int ext2fs_test_changed(ext2_filsys fs)
1627 {
1628 return (fs->flags & EXT2_FLAG_CHANGED);
1629 }
1630
1631 /*
1632 * Mark a filesystem as valid
1633 */
ext2fs_mark_valid(ext2_filsys fs)1634 _INLINE_ void ext2fs_mark_valid(ext2_filsys fs)
1635 {
1636 fs->flags |= EXT2_FLAG_VALID;
1637 }
1638
1639 /*
1640 * Mark a filesystem as NOT valid
1641 */
ext2fs_unmark_valid(ext2_filsys fs)1642 _INLINE_ void ext2fs_unmark_valid(ext2_filsys fs)
1643 {
1644 fs->flags &= ~EXT2_FLAG_VALID;
1645 }
1646
1647 /*
1648 * Check to see if a filesystem is valid
1649 */
ext2fs_test_valid(ext2_filsys fs)1650 _INLINE_ int ext2fs_test_valid(ext2_filsys fs)
1651 {
1652 return (fs->flags & EXT2_FLAG_VALID);
1653 }
1654
1655 /*
1656 * Mark the inode bitmap as dirty
1657 */
ext2fs_mark_ib_dirty(ext2_filsys fs)1658 _INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs)
1659 {
1660 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED;
1661 }
1662
1663 /*
1664 * Mark the block bitmap as dirty
1665 */
ext2fs_mark_bb_dirty(ext2_filsys fs)1666 _INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs)
1667 {
1668 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED;
1669 }
1670
1671 /*
1672 * Check to see if a filesystem's inode bitmap is dirty
1673 */
ext2fs_test_ib_dirty(ext2_filsys fs)1674 _INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs)
1675 {
1676 return (fs->flags & EXT2_FLAG_IB_DIRTY);
1677 }
1678
1679 /*
1680 * Check to see if a filesystem's block bitmap is dirty
1681 */
ext2fs_test_bb_dirty(ext2_filsys fs)1682 _INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs)
1683 {
1684 return (fs->flags & EXT2_FLAG_BB_DIRTY);
1685 }
1686
1687 /*
1688 * Return the group # of a block
1689 */
ext2fs_group_of_blk(ext2_filsys fs,blk_t blk)1690 _INLINE_ dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
1691 {
1692 return ext2fs_group_of_blk2(fs, blk);
1693 }
1694 /*
1695 * Return the group # of an inode number
1696 */
ext2fs_group_of_ino(ext2_filsys fs,ext2_ino_t ino)1697 _INLINE_ dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
1698 {
1699 return (ino - 1) / fs->super->s_inodes_per_group;
1700 }
1701
1702 /*
1703 * Return the first block (inclusive) in a group
1704 */
ext2fs_group_first_block(ext2_filsys fs,dgrp_t group)1705 _INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group)
1706 {
1707 return (blk_t) ext2fs_group_first_block2(fs, group);
1708 }
1709
1710 /*
1711 * Return the last block (inclusive) in a group
1712 */
ext2fs_group_last_block(ext2_filsys fs,dgrp_t group)1713 _INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group)
1714 {
1715 return (blk_t) ext2fs_group_last_block2(fs, group);
1716 }
1717
ext2fs_inode_data_blocks(ext2_filsys fs,struct ext2_inode * inode)1718 _INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1719 struct ext2_inode *inode)
1720 {
1721 return (blk_t) ext2fs_inode_data_blocks2(fs, inode);
1722 }
1723
1724 /*
1725 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
1726 */
ext2fs_div_ceil(unsigned int a,unsigned int b)1727 _INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b)
1728 {
1729 if (!a)
1730 return 0;
1731 return ((a - 1) / b) + 1;
1732 }
1733
ext2fs_div64_ceil(__u64 a,__u64 b)1734 _INLINE_ __u64 ext2fs_div64_ceil(__u64 a, __u64 b)
1735 {
1736 if (!a)
1737 return 0;
1738 return ((a - 1) / b) + 1;
1739 }
1740
1741 #undef _INLINE_
1742 #endif
1743
1744 #ifdef __cplusplus
1745 }
1746 #endif
1747
1748 #endif /* _EXT2FS_EXT2FS_H */
1749