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e2fsck: ea_inode hash validation
[thirdparty/e2fsprogs.git] / lib / ext2fs / ext2fs.h
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 CONFIG_TDB
22 #define EXT2FS_NO_TDB_UNUSED
23 #else
24 #define EXT2FS_NO_TDB_UNUSED EXT2FS_ATTR((unused))
25 #endif
26
27 #ifdef __cplusplus
28 extern "C" {
29 #endif
30
31 /*
32 * Non-GNU C compilers won't necessarily understand inline
33 */
34 #if (!defined(__GNUC__) && !defined(__WATCOMC__))
35 #define NO_INLINE_FUNCS
36 #endif
37
38 /*
39 * Where the master copy of the superblock is located, and how big
40 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because
41 * the size of the superblock structure is not necessarily trustworthy
42 * (some versions have the padding set up so that the superblock is
43 * 1032 bytes long).
44 */
45 #define SUPERBLOCK_OFFSET 1024
46 #define SUPERBLOCK_SIZE 1024
47
48 #define UUID_STR_SIZE 37
49
50 /*
51 * The last ext2fs revision level that this version of the library is
52 * able to support.
53 */
54 #define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV
55
56 #ifdef HAVE_SYS_TYPES_H
57 #include <sys/types.h>
58 #endif
59
60 #include <stdio.h>
61 #include <stdlib.h>
62 #include <string.h>
63 #include <time.h>
64 #include <errno.h>
65
66 #if EXT2_FLAT_INCLUDES
67 #include "e2_types.h"
68 #include "ext2_fs.h"
69 #include "ext3_extents.h"
70 #else
71 #include <ext2fs/ext2_types.h>
72 #include <ext2fs/ext2_fs.h>
73 #include <ext2fs/ext3_extents.h>
74 #endif /* EXT2_FLAT_INCLUDES */
75
76 typedef __u32 __bitwise ext2_ino_t;
77 typedef __u32 __bitwise blk_t;
78 typedef __u64 __bitwise blk64_t;
79 typedef __u32 __bitwise dgrp_t;
80 typedef __u32 __bitwise ext2_off_t;
81 typedef __u64 __bitwise ext2_off64_t;
82 typedef __s64 __bitwise e2_blkcnt_t;
83 typedef __u32 __bitwise ext2_dirhash_t;
84
85 #if EXT2_FLAT_INCLUDES
86 #include "com_err.h"
87 #include "ext2_io.h"
88 #include "ext2_err.h"
89 #include "ext2_ext_attr.h"
90 #else
91 #include <et/com_err.h>
92 #include <ext2fs/ext2_io.h>
93 #include <ext2fs/ext2_err.h>
94 #include <ext2fs/ext2_ext_attr.h>
95 #endif
96
97 /*
98 * Portability help for Microsoft Visual C++
99 */
100 #ifdef _MSC_VER
101 #define EXT2_QSORT_TYPE int __cdecl
102 #else
103 #define EXT2_QSORT_TYPE int
104 #endif
105
106 typedef struct struct_ext2_filsys *ext2_filsys;
107
108 #define EXT2FS_MARK_ERROR 0
109 #define EXT2FS_UNMARK_ERROR 1
110 #define EXT2FS_TEST_ERROR 2
111
112 typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap;
113 typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap;
114 typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap;
115
116 #define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s)
117
118
119 /*
120 * Badblocks list definitions
121 */
122
123 typedef struct ext2_struct_u32_list *ext2_badblocks_list;
124 typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate;
125
126 typedef struct ext2_struct_u32_list *ext2_u32_list;
127 typedef struct ext2_struct_u32_iterate *ext2_u32_iterate;
128
129 /* old */
130 typedef struct ext2_struct_u32_list *badblocks_list;
131 typedef struct ext2_struct_u32_iterate *badblocks_iterate;
132
133 #define BADBLOCKS_FLAG_DIRTY 1
134
135 /*
136 * ext2_dblist structure and abstractions (see dblist.c)
137 */
138 struct ext2_db_entry2 {
139 ext2_ino_t ino;
140 blk64_t blk;
141 e2_blkcnt_t blockcnt;
142 };
143
144 /* Ye Olde 32-bit version */
145 struct ext2_db_entry {
146 ext2_ino_t ino;
147 blk_t blk;
148 int blockcnt;
149 };
150
151 typedef struct ext2_struct_dblist *ext2_dblist;
152
153 #define DBLIST_ABORT 1
154
155 /*
156 * ext2_fileio definitions
157 */
158
159 #define EXT2_FILE_WRITE 0x0001
160 #define EXT2_FILE_CREATE 0x0002
161
162 #define EXT2_FILE_MASK 0x00FF
163
164 #define EXT2_FILE_BUF_DIRTY 0x4000
165 #define EXT2_FILE_BUF_VALID 0x2000
166
167 typedef struct ext2_file *ext2_file_t;
168
169 #define EXT2_SEEK_SET 0
170 #define EXT2_SEEK_CUR 1
171 #define EXT2_SEEK_END 2
172
173 /*
174 * Flags for the ext2_filsys structure and for ext2fs_open()
175 */
176 #define EXT2_FLAG_RW 0x01
177 #define EXT2_FLAG_CHANGED 0x02
178 #define EXT2_FLAG_DIRTY 0x04
179 #define EXT2_FLAG_VALID 0x08
180 #define EXT2_FLAG_IB_DIRTY 0x10
181 #define EXT2_FLAG_BB_DIRTY 0x20
182 #define EXT2_FLAG_SWAP_BYTES 0x40
183 #define EXT2_FLAG_SWAP_BYTES_READ 0x80
184 #define EXT2_FLAG_SWAP_BYTES_WRITE 0x100
185 #define EXT2_FLAG_MASTER_SB_ONLY 0x200
186 #define EXT2_FLAG_FORCE 0x400
187 #define EXT2_FLAG_SUPER_ONLY 0x800
188 #define EXT2_FLAG_JOURNAL_DEV_OK 0x1000
189 #define EXT2_FLAG_IMAGE_FILE 0x2000
190 #define EXT2_FLAG_EXCLUSIVE 0x4000
191 #define EXT2_FLAG_SOFTSUPP_FEATURES 0x8000
192 #define EXT2_FLAG_NOFREE_ON_ERROR 0x10000
193 #define EXT2_FLAG_64BITS 0x20000
194 #define EXT2_FLAG_PRINT_PROGRESS 0x40000
195 #define EXT2_FLAG_DIRECT_IO 0x80000
196 #define EXT2_FLAG_SKIP_MMP 0x100000
197 #define EXT2_FLAG_IGNORE_CSUM_ERRORS 0x200000
198
199 /*
200 * Special flag in the ext2 inode i_flag field that means that this is
201 * a new inode. (So that ext2_write_inode() can clear extra fields.)
202 */
203 #define EXT2_NEW_INODE_FL 0x80000000
204
205 /*
206 * Flags for mkjournal
207 */
208 #define EXT2_MKJOURNAL_V1_SUPER 0x0000001 /* create V1 superblock (deprecated) */
209 #define EXT2_MKJOURNAL_LAZYINIT 0x0000002 /* don't zero journal inode before use*/
210 #define EXT2_MKJOURNAL_NO_MNT_CHECK 0x0000004 /* don't check mount status */
211
212 struct blk_alloc_ctx;
213 struct opaque_ext2_group_desc;
214
215 struct struct_ext2_filsys {
216 errcode_t magic;
217 io_channel io;
218 int flags;
219 char * device_name;
220 struct ext2_super_block * super;
221 unsigned int blocksize;
222 int fragsize;
223 dgrp_t group_desc_count;
224 unsigned long desc_blocks;
225 struct opaque_ext2_group_desc * group_desc;
226 unsigned int inode_blocks_per_group;
227 ext2fs_inode_bitmap inode_map;
228 ext2fs_block_bitmap block_map;
229 /* XXX FIXME-64: not 64-bit safe, but not used? */
230 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
231 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino);
232 errcode_t (*write_bitmaps)(ext2_filsys fs);
233 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino,
234 struct ext2_inode *inode);
235 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino,
236 struct ext2_inode *inode);
237 ext2_badblocks_list badblocks;
238 ext2_dblist dblist;
239 __u32 stride; /* for mke2fs */
240 struct ext2_super_block * orig_super;
241 struct ext2_image_hdr * image_header;
242 __u32 umask;
243 time_t now;
244 int cluster_ratio_bits;
245 __u16 default_bitmap_type;
246 __u16 pad;
247 /*
248 * Reserved for future expansion
249 */
250 __u32 reserved[5];
251
252 /*
253 * Reserved for the use of the calling application.
254 */
255 void * priv_data;
256
257 /*
258 * Inode cache
259 */
260 struct ext2_inode_cache *icache;
261 io_channel image_io;
262
263 /*
264 * More callback functions
265 */
266 errcode_t (*get_alloc_block)(ext2_filsys fs, blk64_t goal,
267 blk64_t *ret);
268 errcode_t (*get_alloc_block2)(ext2_filsys fs, blk64_t goal,
269 blk64_t *ret, struct blk_alloc_ctx *ctx);
270 void (*block_alloc_stats)(ext2_filsys fs, blk64_t blk, int inuse);
271
272 /*
273 * Buffers for Multiple mount protection(MMP) block.
274 */
275 void *mmp_buf;
276 void *mmp_cmp;
277 int mmp_fd;
278
279 /*
280 * Time at which e2fsck last updated the MMP block.
281 */
282 long mmp_last_written;
283
284 /* progress operation functions */
285 struct ext2fs_progress_ops *progress_ops;
286
287 /* Precomputed FS UUID checksum for seeding other checksums */
288 __u32 csum_seed;
289
290 io_channel journal_io;
291 char *journal_name;
292
293 /* New block range allocation hooks */
294 errcode_t (*new_range)(ext2_filsys fs, int flags, blk64_t goal,
295 blk64_t len, blk64_t *pblk, blk64_t *plen);
296 void (*block_alloc_stats_range)(ext2_filsys fs, blk64_t blk, blk_t num,
297 int inuse);
298 };
299
300 #if EXT2_FLAT_INCLUDES
301 #include "e2_bitops.h"
302 #else
303 #include <ext2fs/bitops.h>
304 #endif
305
306 /*
307 * 64-bit bitmap backend types
308 */
309 #define EXT2FS_BMAP64_BITARRAY 1
310 #define EXT2FS_BMAP64_RBTREE 2
311 #define EXT2FS_BMAP64_AUTODIR 3
312
313 /*
314 * Return flags for the block iterator functions
315 */
316 #define BLOCK_CHANGED 1
317 #define BLOCK_ABORT 2
318 #define BLOCK_ERROR 4
319 #define BLOCK_INLINE_DATA_CHANGED 8
320
321 /*
322 * Block interate flags
323 *
324 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator
325 * function should be called on blocks where the block number is zero.
326 * This is used by ext2fs_expand_dir() to be able to add a new block
327 * to an inode. It can also be used for programs that want to be able
328 * to deal with files that contain "holes".
329 *
330 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for
331 * the indirect, doubly indirect, etc. blocks should be called after
332 * all of the blocks containined in the indirect blocks are processed.
333 * This is useful if you are going to be deallocating blocks from an
334 * inode.
335 *
336 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be
337 * called for data blocks only.
338 *
339 * BLOCK_FLAG_READ_ONLY is a promise by the caller that it will not
340 * modify returned block number.
341 *
342 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs
343 * ext2fs_block_iterate2 that large files won't be accepted.
344 */
345 #define BLOCK_FLAG_APPEND 1
346 #define BLOCK_FLAG_HOLE 1
347 #define BLOCK_FLAG_DEPTH_TRAVERSE 2
348 #define BLOCK_FLAG_DATA_ONLY 4
349 #define BLOCK_FLAG_READ_ONLY 8
350
351 #define BLOCK_FLAG_NO_LARGE 0x1000
352
353 /*
354 * Magic "block count" return values for the block iterator function.
355 */
356 #define BLOCK_COUNT_IND (-1)
357 #define BLOCK_COUNT_DIND (-2)
358 #define BLOCK_COUNT_TIND (-3)
359 #define BLOCK_COUNT_TRANSLATOR (-4)
360
361 #define BLOCK_ALLOC_UNKNOWN 0
362 #define BLOCK_ALLOC_DATA 1
363 #define BLOCK_ALLOC_METADATA 2
364
365 struct blk_alloc_ctx {
366 ext2_ino_t ino;
367 struct ext2_inode *inode;
368 blk64_t lblk;
369 int flags;
370 };
371
372 #if 0
373 /*
374 * Flags for ext2fs_move_blocks
375 */
376 #define EXT2_BMOVE_GET_DBLIST 0x0001
377 #define EXT2_BMOVE_DEBUG 0x0002
378 #endif
379
380 /*
381 * Generic (non-filesystem layout specific) extents structure
382 */
383
384 #define EXT2_EXTENT_FLAGS_LEAF 0x0001
385 #define EXT2_EXTENT_FLAGS_UNINIT 0x0002
386 #define EXT2_EXTENT_FLAGS_SECOND_VISIT 0x0004
387
388 struct ext2fs_extent {
389 blk64_t e_pblk; /* first physical block */
390 blk64_t e_lblk; /* first logical block extent covers */
391 __u32 e_len; /* number of blocks covered by extent */
392 __u32 e_flags; /* extent flags */
393 };
394
395 typedef struct ext2_extent_handle *ext2_extent_handle_t;
396 typedef struct ext2_extent_path *ext2_extent_path_t;
397
398 /*
399 * Flags used by ext2fs_extent_get()
400 */
401 #define EXT2_EXTENT_CURRENT 0x0000
402 #define EXT2_EXTENT_MOVE_MASK 0x000F
403 #define EXT2_EXTENT_ROOT 0x0001
404 #define EXT2_EXTENT_LAST_LEAF 0x0002
405 #define EXT2_EXTENT_FIRST_SIB 0x0003
406 #define EXT2_EXTENT_LAST_SIB 0x0004
407 #define EXT2_EXTENT_NEXT_SIB 0x0005
408 #define EXT2_EXTENT_PREV_SIB 0x0006
409 #define EXT2_EXTENT_NEXT_LEAF 0x0007
410 #define EXT2_EXTENT_PREV_LEAF 0x0008
411 #define EXT2_EXTENT_NEXT 0x0009
412 #define EXT2_EXTENT_PREV 0x000A
413 #define EXT2_EXTENT_UP 0x000B
414 #define EXT2_EXTENT_DOWN 0x000C
415 #define EXT2_EXTENT_DOWN_AND_LAST 0x000D
416
417 /*
418 * Flags used by ext2fs_extent_insert()
419 */
420 #define EXT2_EXTENT_INSERT_AFTER 0x0001 /* insert after handle loc'n */
421 #define EXT2_EXTENT_INSERT_NOSPLIT 0x0002 /* insert may not cause split */
422
423 /*
424 * Flags used by ext2fs_extent_delete()
425 */
426 #define EXT2_EXTENT_DELETE_KEEP_EMPTY 0x001 /* keep node if last extnt gone */
427
428 /*
429 * Flags used by ext2fs_extent_set_bmap()
430 */
431 #define EXT2_EXTENT_SET_BMAP_UNINIT 0x0001
432
433 /*
434 * Data structure returned by ext2fs_extent_get_info()
435 */
436 struct ext2_extent_info {
437 int curr_entry;
438 int curr_level;
439 int num_entries;
440 int max_entries;
441 int max_depth;
442 int bytes_avail;
443 blk64_t max_lblk;
444 blk64_t max_pblk;
445 __u32 max_len;
446 __u32 max_uninit_len;
447 };
448
449 /*
450 * Flags for directory block reading and writing functions
451 */
452 #define EXT2_DIRBLOCK_V2_STRUCT 0x0001
453
454 /*
455 * Return flags for the directory iterator functions
456 */
457 #define DIRENT_CHANGED 1
458 #define DIRENT_ABORT 2
459 #define DIRENT_ERROR 3
460
461 /*
462 * Directory iterator flags
463 */
464
465 #define DIRENT_FLAG_INCLUDE_EMPTY 1
466 #define DIRENT_FLAG_INCLUDE_REMOVED 2
467 #define DIRENT_FLAG_INCLUDE_CSUM 4
468 #define DIRENT_FLAG_INCLUDE_INLINE_DATA 8
469
470 #define DIRENT_DOT_FILE 1
471 #define DIRENT_DOT_DOT_FILE 2
472 #define DIRENT_OTHER_FILE 3
473 #define DIRENT_DELETED_FILE 4
474 #define DIRENT_CHECKSUM 5
475
476 /*
477 * Inode scan definitions
478 */
479 typedef struct ext2_struct_inode_scan *ext2_inode_scan;
480
481 /*
482 * ext2fs_scan flags
483 */
484 #define EXT2_SF_CHK_BADBLOCKS 0x0001
485 #define EXT2_SF_BAD_INODE_BLK 0x0002
486 #define EXT2_SF_BAD_EXTRA_BYTES 0x0004
487 #define EXT2_SF_SKIP_MISSING_ITABLE 0x0008
488 #define EXT2_SF_DO_LAZY 0x0010
489 #define EXT2_SF_WARN_GARBAGE_INODES 0x0020
490
491 /*
492 * ext2fs_check_if_mounted flags
493 */
494 #define EXT2_MF_MOUNTED 1
495 #define EXT2_MF_ISROOT 2
496 #define EXT2_MF_READONLY 4
497 #define EXT2_MF_SWAP 8
498 #define EXT2_MF_BUSY 16
499
500 /*
501 * Ext2/linux mode flags. We define them here so that we don't need
502 * to depend on the OS's sys/stat.h, since we may be compiling on a
503 * non-Linux system.
504 */
505 #define LINUX_S_IFMT 00170000
506 #define LINUX_S_IFSOCK 0140000
507 #define LINUX_S_IFLNK 0120000
508 #define LINUX_S_IFREG 0100000
509 #define LINUX_S_IFBLK 0060000
510 #define LINUX_S_IFDIR 0040000
511 #define LINUX_S_IFCHR 0020000
512 #define LINUX_S_IFIFO 0010000
513 #define LINUX_S_ISUID 0004000
514 #define LINUX_S_ISGID 0002000
515 #define LINUX_S_ISVTX 0001000
516
517 #define LINUX_S_IRWXU 00700
518 #define LINUX_S_IRUSR 00400
519 #define LINUX_S_IWUSR 00200
520 #define LINUX_S_IXUSR 00100
521
522 #define LINUX_S_IRWXG 00070
523 #define LINUX_S_IRGRP 00040
524 #define LINUX_S_IWGRP 00020
525 #define LINUX_S_IXGRP 00010
526
527 #define LINUX_S_IRWXO 00007
528 #define LINUX_S_IROTH 00004
529 #define LINUX_S_IWOTH 00002
530 #define LINUX_S_IXOTH 00001
531
532 #define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK)
533 #define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG)
534 #define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR)
535 #define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR)
536 #define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK)
537 #define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO)
538 #define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK)
539
540 /*
541 * ext2 size of an inode
542 */
543 #define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32))
544
545 /*
546 * ext2_icount_t abstraction
547 */
548 #define EXT2_ICOUNT_OPT_INCREMENT 0x01
549
550 typedef struct ext2_icount *ext2_icount_t;
551
552 /*
553 * Flags for ext2fs_bmap
554 */
555 #define BMAP_ALLOC 0x0001
556 #define BMAP_SET 0x0002
557 #define BMAP_UNINIT 0x0004
558 #define BMAP_ZERO 0x0008
559
560 /*
561 * Returned flags from ext2fs_bmap
562 */
563 #define BMAP_RET_UNINIT 0x0001
564
565 /*
566 * Flags for imager.c functions
567 */
568 #define IMAGER_FLAG_INODEMAP 1
569 #define IMAGER_FLAG_SPARSEWRITE 2
570
571 /*
572 * For checking structure magic numbers...
573 */
574
575 #define EXT2_CHECK_MAGIC(struct, code) \
576 if ((struct)->magic != (code)) return (code)
577
578 /*
579 * Features supported by this version of the library
580 */
581 #define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\
582 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\
583 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\
584 EXT2_FEATURE_COMPAT_RESIZE_INODE|\
585 EXT2_FEATURE_COMPAT_DIR_INDEX|\
586 EXT2_FEATURE_COMPAT_EXT_ATTR|\
587 EXT4_FEATURE_COMPAT_SPARSE_SUPER2)
588
589 #ifdef CONFIG_MMP
590 #define EXT4_LIB_INCOMPAT_MMP EXT4_FEATURE_INCOMPAT_MMP
591 #else
592 #define EXT4_LIB_INCOMPAT_MMP (0)
593 #endif
594
595 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\
596 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\
597 EXT2_FEATURE_INCOMPAT_META_BG|\
598 EXT3_FEATURE_INCOMPAT_RECOVER|\
599 EXT3_FEATURE_INCOMPAT_EXTENTS|\
600 EXT4_FEATURE_INCOMPAT_FLEX_BG|\
601 EXT4_FEATURE_INCOMPAT_EA_INODE|\
602 EXT4_LIB_INCOMPAT_MMP|\
603 EXT4_FEATURE_INCOMPAT_64BIT|\
604 EXT4_FEATURE_INCOMPAT_INLINE_DATA|\
605 EXT4_FEATURE_INCOMPAT_ENCRYPT|\
606 EXT4_FEATURE_INCOMPAT_CSUM_SEED|\
607 EXT4_FEATURE_INCOMPAT_LARGEDIR)
608
609 #define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
610 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
611 EXT2_FEATURE_RO_COMPAT_LARGE_FILE|\
612 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\
613 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|\
614 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\
615 EXT4_FEATURE_RO_COMPAT_BIGALLOC|\
616 EXT4_FEATURE_RO_COMPAT_QUOTA|\
617 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
618 EXT4_FEATURE_RO_COMPAT_READONLY |\
619 EXT4_FEATURE_RO_COMPAT_PROJECT)
620
621 /*
622 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed
623 * to ext2fs_openfs()
624 */
625 #define EXT2_LIB_SOFTSUPP_INCOMPAT (0)
626 #define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_REPLICA)
627
628
629 /* Translate a block number to a cluster number */
630 #define EXT2FS_CLUSTER_RATIO(fs) (1 << (fs)->cluster_ratio_bits)
631 #define EXT2FS_CLUSTER_MASK(fs) (EXT2FS_CLUSTER_RATIO(fs) - 1)
632 #define EXT2FS_B2C(fs, blk) ((blk) >> (fs)->cluster_ratio_bits)
633 /* Translate a cluster number to a block number */
634 #define EXT2FS_C2B(fs, cluster) ((cluster) << (fs)->cluster_ratio_bits)
635 /* Translate # of blks to # of clusters */
636 #define EXT2FS_NUM_B2C(fs, blks) (((blks) + EXT2FS_CLUSTER_MASK(fs)) >> \
637 (fs)->cluster_ratio_bits)
638
639 #if defined(HAVE_FSTAT64) && !defined(__OSX_AVAILABLE_BUT_DEPRECATED)
640 typedef struct stat64 ext2fs_struct_stat;
641 #else
642 typedef struct stat ext2fs_struct_stat;
643 #endif
644
645 /*
646 * For ext2fs_close2() and ext2fs_flush2(), this flag allows you to
647 * avoid the fsync call.
648 */
649 #define EXT2_FLAG_FLUSH_NO_SYNC 1
650
651 /*
652 * Modify and iterate extended attributes
653 */
654 struct ext2_xattr_handle;
655 #define XATTR_ABORT 1
656 #define XATTR_CHANGED 2
657
658 /*
659 * function prototypes
660 */
661 static inline int ext2fs_has_group_desc_csum(ext2_filsys fs)
662 {
663 return ext2fs_has_feature_metadata_csum(fs->super) ||
664 ext2fs_has_feature_gdt_csum(fs->super);
665 }
666
667 /* The LARGE_FILE feature should be set if we have stored files 2GB+ in size */
668 static inline int ext2fs_needs_large_file_feature(unsigned long long file_size)
669 {
670 return file_size >= 0x80000000ULL;
671 }
672
673 /* alloc.c */
674 extern void ext2fs_clear_block_uninit(ext2_filsys fs, dgrp_t group);
675 extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode,
676 ext2fs_inode_bitmap map, ext2_ino_t *ret);
677 extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
678 ext2fs_block_bitmap map, blk_t *ret);
679 extern errcode_t ext2fs_new_block2(ext2_filsys fs, blk64_t goal,
680 ext2fs_block_bitmap map, blk64_t *ret);
681 extern errcode_t ext2fs_new_block3(ext2_filsys fs, blk64_t goal,
682 ext2fs_block_bitmap map, blk64_t *ret,
683 struct blk_alloc_ctx *ctx);
684 extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start,
685 blk_t finish, int num,
686 ext2fs_block_bitmap map,
687 blk_t *ret);
688 extern errcode_t ext2fs_get_free_blocks2(ext2_filsys fs, blk64_t start,
689 blk64_t finish, int num,
690 ext2fs_block_bitmap map,
691 blk64_t *ret);
692 extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
693 char *block_buf, blk_t *ret);
694 extern errcode_t ext2fs_alloc_block2(ext2_filsys fs, blk64_t goal,
695 char *block_buf, blk64_t *ret);
696 extern errcode_t ext2fs_alloc_block3(ext2_filsys fs, blk64_t goal,
697 char *block_buf, blk64_t *ret,
698 struct blk_alloc_ctx *ctx);
699
700 extern void ext2fs_set_alloc_block_callback(ext2_filsys fs,
701 errcode_t (*func)(ext2_filsys fs,
702 blk64_t goal,
703 blk64_t *ret),
704 errcode_t (**old)(ext2_filsys fs,
705 blk64_t goal,
706 blk64_t *ret));
707 blk64_t ext2fs_find_inode_goal(ext2_filsys fs, ext2_ino_t ino,
708 struct ext2_inode *inode, blk64_t lblk);
709 extern void ext2fs_set_new_range_callback(ext2_filsys fs,
710 errcode_t (*func)(ext2_filsys fs, int flags, blk64_t goal,
711 blk64_t len, blk64_t *pblk, blk64_t *plen),
712 errcode_t (**old)(ext2_filsys fs, int flags, blk64_t goal,
713 blk64_t len, blk64_t *pblk, blk64_t *plen));
714 extern void ext2fs_set_block_alloc_stats_range_callback(ext2_filsys fs,
715 void (*func)(ext2_filsys fs, blk64_t blk,
716 blk_t num, int inuse),
717 void (**old)(ext2_filsys fs, blk64_t blk,
718 blk_t num, int inuse));
719 #define EXT2_NEWRANGE_FIXED_GOAL (0x1)
720 #define EXT2_NEWRANGE_MIN_LENGTH (0x2)
721 #define EXT2_NEWRANGE_ALL_FLAGS (0x3)
722 errcode_t ext2fs_new_range(ext2_filsys fs, int flags, blk64_t goal,
723 blk64_t len, ext2fs_block_bitmap map, blk64_t *pblk,
724 blk64_t *plen);
725 #define EXT2_ALLOCRANGE_FIXED_GOAL (0x1)
726 #define EXT2_ALLOCRANGE_ZERO_BLOCKS (0x2)
727 #define EXT2_ALLOCRANGE_ALL_FLAGS (0x3)
728 errcode_t ext2fs_alloc_range(ext2_filsys fs, int flags, blk64_t goal,
729 blk_t len, blk64_t *ret);
730
731 /* alloc_sb.c */
732 extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
733 dgrp_t group,
734 ext2fs_block_bitmap bmap);
735 extern void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
736 void (*func)(ext2_filsys fs,
737 blk64_t blk,
738 int inuse),
739 void (**old)(ext2_filsys fs,
740 blk64_t blk,
741 int inuse));
742
743 /* alloc_stats.c */
744 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse);
745 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
746 int inuse, int isdir);
747 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse);
748 void ext2fs_block_alloc_stats2(ext2_filsys fs, blk64_t blk, int inuse);
749 void ext2fs_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
750 blk_t num, int inuse);
751
752 /* alloc_tables.c */
753 extern errcode_t ext2fs_allocate_tables(ext2_filsys fs);
754 extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
755 ext2fs_block_bitmap bmap);
756
757 /* badblocks.c */
758 extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size);
759 extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk);
760 extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk);
761 extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk);
762 extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb,
763 ext2_u32_iterate *ret);
764 extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk);
765 extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter);
766 extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest);
767 extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2);
768
769 extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret,
770 int size);
771 extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb,
772 blk_t blk);
773 extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb,
774 blk_t blk);
775 extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk);
776 extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk);
777 extern errcode_t
778 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
779 ext2_badblocks_iterate *ret);
780 extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter,
781 blk_t *blk);
782 extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter);
783 extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
784 ext2_badblocks_list *dest);
785 extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1,
786 ext2_badblocks_list bb2);
787 extern int ext2fs_u32_list_count(ext2_u32_list bb);
788
789 /* bb_compat */
790 extern errcode_t badblocks_list_create(badblocks_list *ret, int size);
791 extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk);
792 extern int badblocks_list_test(badblocks_list bb, blk_t blk);
793 extern errcode_t badblocks_list_iterate_begin(badblocks_list bb,
794 badblocks_iterate *ret);
795 extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk);
796 extern void badblocks_list_iterate_end(badblocks_iterate iter);
797 extern void badblocks_list_free(badblocks_list bb);
798
799 /* bb_inode.c */
800 extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs,
801 ext2_badblocks_list bb_list);
802
803 /* bitmaps.c */
804 extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap);
805 extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap);
806 extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
807 ext2fs_generic_bitmap *dest);
808 extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs);
809 extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs);
810 extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs);
811 extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs);
812 extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
813 const char *descr,
814 ext2fs_block_bitmap *ret);
815 extern errcode_t ext2fs_allocate_subcluster_bitmap(ext2_filsys fs,
816 const char *descr,
817 ext2fs_block_bitmap *ret);
818 extern int ext2fs_get_bitmap_granularity(ext2fs_block_bitmap bitmap);
819 extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
820 const char *descr,
821 ext2fs_inode_bitmap *ret);
822 extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
823 ext2_ino_t end, ext2_ino_t *oend);
824 extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
825 blk_t end, blk_t *oend);
826 extern errcode_t ext2fs_fudge_block_bitmap_end2(ext2fs_block_bitmap bitmap,
827 blk64_t end, blk64_t *oend);
828 extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap);
829 extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap);
830 extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs);
831 extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs);
832 extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
833 ext2fs_inode_bitmap bmap);
834 extern errcode_t ext2fs_resize_inode_bitmap2(__u64 new_end,
835 __u64 new_real_end,
836 ext2fs_inode_bitmap bmap);
837 extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
838 ext2fs_block_bitmap bmap);
839 extern errcode_t ext2fs_resize_block_bitmap2(__u64 new_end,
840 __u64 new_real_end,
841 ext2fs_block_bitmap bmap);
842 extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
843 ext2fs_block_bitmap bm2);
844 extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
845 ext2fs_inode_bitmap bm2);
846 extern errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap,
847 ext2_ino_t start, unsigned int num,
848 void *in);
849 extern errcode_t ext2fs_set_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
850 __u64 start, size_t num,
851 void *in);
852 extern errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap,
853 ext2_ino_t start, unsigned int num,
854 void *out);
855 extern errcode_t ext2fs_get_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
856 __u64 start, size_t num,
857 void *out);
858 extern errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap,
859 blk_t start, unsigned int num,
860 void *in);
861 extern errcode_t ext2fs_set_block_bitmap_range2(ext2fs_block_bitmap bmap,
862 blk64_t start, size_t num,
863 void *in);
864 extern errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap,
865 blk_t start, unsigned int num,
866 void *out);
867 extern errcode_t ext2fs_get_block_bitmap_range2(ext2fs_block_bitmap bmap,
868 blk64_t start, size_t num,
869 void *out);
870
871 /* blknum.c */
872 extern __u32 ext2fs_inode_bitmap_checksum(ext2_filsys fs, dgrp_t group);
873 extern __u32 ext2fs_block_bitmap_checksum(ext2_filsys fs, dgrp_t group);
874 extern dgrp_t ext2fs_group_of_blk2(ext2_filsys fs, blk64_t);
875 extern blk64_t ext2fs_group_first_block2(ext2_filsys fs, dgrp_t group);
876 extern blk64_t ext2fs_group_last_block2(ext2_filsys fs, dgrp_t group);
877 extern int ext2fs_group_blocks_count(ext2_filsys fs, dgrp_t group);
878 extern blk64_t ext2fs_inode_data_blocks2(ext2_filsys fs,
879 struct ext2_inode *inode);
880 extern blk64_t ext2fs_inode_i_blocks(ext2_filsys fs,
881 struct ext2_inode *inode);
882 extern blk64_t ext2fs_blocks_count(struct ext2_super_block *super);
883 extern void ext2fs_blocks_count_set(struct ext2_super_block *super,
884 blk64_t blk);
885 extern void ext2fs_blocks_count_add(struct ext2_super_block *super,
886 blk64_t blk);
887 extern blk64_t ext2fs_r_blocks_count(struct ext2_super_block *super);
888 extern void ext2fs_r_blocks_count_set(struct ext2_super_block *super,
889 blk64_t blk);
890 extern void ext2fs_r_blocks_count_add(struct ext2_super_block *super,
891 blk64_t blk);
892 extern blk64_t ext2fs_free_blocks_count(struct ext2_super_block *super);
893 extern void ext2fs_free_blocks_count_set(struct ext2_super_block *super,
894 blk64_t blk);
895 extern void ext2fs_free_blocks_count_add(struct ext2_super_block *super,
896 blk64_t blk);
897 /* Block group descriptor accessor functions */
898 extern struct ext2_group_desc *ext2fs_group_desc(ext2_filsys fs,
899 struct opaque_ext2_group_desc *gdp,
900 dgrp_t group);
901 extern blk64_t ext2fs_block_bitmap_csum(ext2_filsys fs, dgrp_t group);
902 extern blk64_t ext2fs_block_bitmap_loc(ext2_filsys fs, dgrp_t group);
903 extern void ext2fs_block_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
904 blk64_t blk);
905 extern __u32 ext2fs_inode_bitmap_csum(ext2_filsys fs, dgrp_t group);
906 extern blk64_t ext2fs_inode_bitmap_loc(ext2_filsys fs, dgrp_t group);
907 extern void ext2fs_inode_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
908 blk64_t blk);
909 extern blk64_t ext2fs_inode_table_loc(ext2_filsys fs, dgrp_t group);
910 extern void ext2fs_inode_table_loc_set(ext2_filsys fs, dgrp_t group,
911 blk64_t blk);
912 extern __u32 ext2fs_bg_free_blocks_count(ext2_filsys fs, dgrp_t group);
913 extern void ext2fs_bg_free_blocks_count_set(ext2_filsys fs, dgrp_t group,
914 __u32 n);
915 extern __u32 ext2fs_bg_free_inodes_count(ext2_filsys fs, dgrp_t group);
916 extern void ext2fs_bg_free_inodes_count_set(ext2_filsys fs, dgrp_t group,
917 __u32 n);
918 extern __u32 ext2fs_bg_used_dirs_count(ext2_filsys fs, dgrp_t group);
919 extern void ext2fs_bg_used_dirs_count_set(ext2_filsys fs, dgrp_t group,
920 __u32 n);
921 extern __u32 ext2fs_bg_itable_unused(ext2_filsys fs, dgrp_t group);
922 extern void ext2fs_bg_itable_unused_set(ext2_filsys fs, dgrp_t group,
923 __u32 n);
924 extern __u16 ext2fs_bg_flags(ext2_filsys fs, dgrp_t group);
925 extern void ext2fs_bg_flags_zap(ext2_filsys fs, dgrp_t group);
926 extern int ext2fs_bg_flags_test(ext2_filsys fs, dgrp_t group, __u16 bg_flag);
927 extern void ext2fs_bg_flags_set(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
928 extern void ext2fs_bg_flags_clear(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
929 extern __u16 ext2fs_bg_checksum(ext2_filsys fs, dgrp_t group);
930 extern void ext2fs_bg_checksum_set(ext2_filsys fs, dgrp_t group, __u16 checksum);
931 extern blk64_t ext2fs_file_acl_block(ext2_filsys fs,
932 const struct ext2_inode *inode);
933 extern void ext2fs_file_acl_block_set(ext2_filsys fs,
934 struct ext2_inode *inode, blk64_t blk);
935 extern errcode_t ext2fs_inode_size_set(ext2_filsys fs, struct ext2_inode *inode,
936 ext2_off64_t size);
937
938 /* block.c */
939 extern errcode_t ext2fs_block_iterate(ext2_filsys fs,
940 ext2_ino_t ino,
941 int flags,
942 char *block_buf,
943 int (*func)(ext2_filsys fs,
944 blk_t *blocknr,
945 int blockcnt,
946 void *priv_data),
947 void *priv_data);
948 errcode_t ext2fs_block_iterate2(ext2_filsys fs,
949 ext2_ino_t ino,
950 int flags,
951 char *block_buf,
952 int (*func)(ext2_filsys fs,
953 blk_t *blocknr,
954 e2_blkcnt_t blockcnt,
955 blk_t ref_blk,
956 int ref_offset,
957 void *priv_data),
958 void *priv_data);
959 errcode_t ext2fs_block_iterate3(ext2_filsys fs,
960 ext2_ino_t ino,
961 int flags,
962 char *block_buf,
963 int (*func)(ext2_filsys fs,
964 blk64_t *blocknr,
965 e2_blkcnt_t blockcnt,
966 blk64_t ref_blk,
967 int ref_offset,
968 void *priv_data),
969 void *priv_data);
970
971 /* bmap.c */
972 extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino,
973 struct ext2_inode *inode,
974 char *block_buf, int bmap_flags,
975 blk_t block, blk_t *phys_blk);
976 extern errcode_t ext2fs_bmap2(ext2_filsys fs, ext2_ino_t ino,
977 struct ext2_inode *inode,
978 char *block_buf, int bmap_flags, blk64_t block,
979 int *ret_flags, blk64_t *phys_blk);
980 errcode_t ext2fs_map_cluster_block(ext2_filsys fs, ext2_ino_t ino,
981 struct ext2_inode *inode, blk64_t lblk,
982 blk64_t *pblk);
983
984 #if 0
985 /* bmove.c */
986 extern errcode_t ext2fs_move_blocks(ext2_filsys fs,
987 ext2fs_block_bitmap reserve,
988 ext2fs_block_bitmap alloc_map,
989 int flags);
990 #endif
991
992 /* check_desc.c */
993 extern errcode_t ext2fs_check_desc(ext2_filsys fs);
994
995 /* closefs.c */
996 extern errcode_t ext2fs_close(ext2_filsys fs);
997 extern errcode_t ext2fs_close2(ext2_filsys fs, int flags);
998 extern errcode_t ext2fs_close_free(ext2_filsys *fs);
999 extern errcode_t ext2fs_flush(ext2_filsys fs);
1000 extern errcode_t ext2fs_flush2(ext2_filsys fs, int flags);
1001 extern int ext2fs_bg_has_super(ext2_filsys fs, dgrp_t group_block);
1002 extern errcode_t ext2fs_super_and_bgd_loc2(ext2_filsys fs,
1003 dgrp_t group,
1004 blk64_t *ret_super_blk,
1005 blk64_t *ret_old_desc_blk,
1006 blk64_t *ret_new_desc_blk,
1007 blk_t *ret_used_blks);
1008 extern int ext2fs_super_and_bgd_loc(ext2_filsys fs,
1009 dgrp_t group,
1010 blk_t *ret_super_blk,
1011 blk_t *ret_old_desc_blk,
1012 blk_t *ret_new_desc_blk,
1013 int *ret_meta_bg);
1014 extern void ext2fs_update_dynamic_rev(ext2_filsys fs);
1015
1016 /* crc32c.c */
1017 extern __u32 ext2fs_crc32_be(__u32 crc, unsigned char const *p, size_t len);
1018 extern __u32 ext2fs_crc32c_le(__u32 crc, unsigned char const *p, size_t len);
1019
1020 /* csum.c */
1021 extern void ext2fs_init_csum_seed(ext2_filsys fs);
1022 extern errcode_t ext2fs_mmp_csum_set(ext2_filsys fs, struct mmp_struct *mmp);
1023 extern int ext2fs_mmp_csum_verify(ext2_filsys, struct mmp_struct *mmp);
1024 extern int ext2fs_verify_csum_type(ext2_filsys fs, struct ext2_super_block *sb);
1025 extern errcode_t ext2fs_superblock_csum_set(ext2_filsys fs,
1026 struct ext2_super_block *sb);
1027 extern int ext2fs_superblock_csum_verify(ext2_filsys fs,
1028 struct ext2_super_block *sb);
1029 extern errcode_t ext2fs_ext_attr_block_csum_set(ext2_filsys fs,
1030 ext2_ino_t inum, blk64_t block,
1031 struct ext2_ext_attr_header *hdr);
1032 extern int ext2fs_ext_attr_block_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1033 blk64_t block,
1034 struct ext2_ext_attr_header *hdr);
1035 #define EXT2_DIRENT_TAIL(block, blocksize) \
1036 ((struct ext2_dir_entry_tail *)(((char *)(block)) + \
1037 (blocksize) - sizeof(struct ext2_dir_entry_tail)))
1038
1039 extern void ext2fs_initialize_dirent_tail(ext2_filsys fs,
1040 struct ext2_dir_entry_tail *t);
1041 extern int ext2fs_dirent_has_tail(ext2_filsys fs,
1042 struct ext2_dir_entry *dirent);
1043 extern int ext2fs_dirent_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1044 struct ext2_dir_entry *dirent);
1045 extern int ext2fs_dir_block_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1046 struct ext2_dir_entry *dirent);
1047 extern errcode_t ext2fs_dir_block_csum_set(ext2_filsys fs, ext2_ino_t inum,
1048 struct ext2_dir_entry *dirent);
1049 extern errcode_t ext2fs_get_dx_countlimit(ext2_filsys fs,
1050 struct ext2_dir_entry *dirent,
1051 struct ext2_dx_countlimit **cc,
1052 int *offset);
1053 extern errcode_t ext2fs_extent_block_csum_set(ext2_filsys fs,
1054 ext2_ino_t inum,
1055 struct ext3_extent_header *eh);
1056 extern int ext2fs_extent_block_csum_verify(ext2_filsys fs,
1057 ext2_ino_t inum,
1058 struct ext3_extent_header *eh);
1059 extern errcode_t ext2fs_block_bitmap_csum_set(ext2_filsys fs, dgrp_t group,
1060 char *bitmap, int size);
1061 extern int ext2fs_block_bitmap_csum_verify(ext2_filsys fs, dgrp_t group,
1062 char *bitmap, int size);
1063 extern errcode_t ext2fs_inode_bitmap_csum_set(ext2_filsys fs, dgrp_t group,
1064 char *bitmap, int size);
1065 extern int ext2fs_inode_bitmap_csum_verify(ext2_filsys fs, dgrp_t group,
1066 char *bitmap, int size);
1067 extern errcode_t ext2fs_inode_csum_set(ext2_filsys fs, ext2_ino_t inum,
1068 struct ext2_inode_large *inode);
1069 extern int ext2fs_inode_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1070 struct ext2_inode_large *inode);
1071 extern void ext2fs_group_desc_csum_set(ext2_filsys fs, dgrp_t group);
1072 extern int ext2fs_group_desc_csum_verify(ext2_filsys fs, dgrp_t group);
1073 extern errcode_t ext2fs_set_gdt_csum(ext2_filsys fs);
1074 extern __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group);
1075
1076 /* dblist.c */
1077 extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist);
1078 extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino,
1079 blk_t blk, int blockcnt);
1080 extern errcode_t ext2fs_add_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
1081 blk64_t blk, e2_blkcnt_t blockcnt);
1082 extern void ext2fs_dblist_sort(ext2_dblist dblist,
1083 EXT2_QSORT_TYPE (*sortfunc)(const void *,
1084 const void *));
1085 extern void ext2fs_dblist_sort2(ext2_dblist dblist,
1086 EXT2_QSORT_TYPE (*sortfunc)(const void *,
1087 const void *));
1088 extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist,
1089 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info,
1090 void *priv_data),
1091 void *priv_data);
1092 extern errcode_t ext2fs_dblist_iterate2(ext2_dblist dblist,
1093 int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info,
1094 void *priv_data),
1095 void *priv_data);
1096 extern errcode_t ext2fs_dblist_iterate3(ext2_dblist dblist,
1097 int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info,
1098 void *priv_data),
1099 unsigned long long start,
1100 unsigned long long count,
1101 void *priv_data);
1102 extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino,
1103 blk_t blk, int blockcnt);
1104 extern errcode_t ext2fs_set_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
1105 blk64_t blk, e2_blkcnt_t blockcnt);
1106 extern errcode_t ext2fs_copy_dblist(ext2_dblist src,
1107 ext2_dblist *dest);
1108 extern int ext2fs_dblist_count(ext2_dblist dblist);
1109 extern blk64_t ext2fs_dblist_count2(ext2_dblist dblist);
1110 extern errcode_t ext2fs_dblist_get_last(ext2_dblist dblist,
1111 struct ext2_db_entry **entry);
1112 extern errcode_t ext2fs_dblist_get_last2(ext2_dblist dblist,
1113 struct ext2_db_entry2 **entry);
1114 extern errcode_t ext2fs_dblist_drop_last(ext2_dblist dblist);
1115
1116 /* dblist_dir.c */
1117 extern errcode_t
1118 ext2fs_dblist_dir_iterate(ext2_dblist dblist,
1119 int flags,
1120 char *block_buf,
1121 int (*func)(ext2_ino_t dir,
1122 int entry,
1123 struct ext2_dir_entry *dirent,
1124 int offset,
1125 int blocksize,
1126 char *buf,
1127 void *priv_data),
1128 void *priv_data);
1129
1130 #if 0
1131 /* digest_encode.c */
1132 #define EXT2FS_DIGEST_SIZE EXT2FS_SHA256_LENGTH
1133 extern int ext2fs_digest_encode(const char *src, int len, char *dst);
1134 extern int ext2fs_digest_decode(const char *src, int len, char *dst);
1135 #endif
1136
1137 /* dirblock.c */
1138 extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
1139 void *buf);
1140 extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
1141 void *buf, int flags);
1142 extern errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block,
1143 void *buf, int flags);
1144 extern errcode_t ext2fs_read_dir_block4(ext2_filsys fs, blk64_t block,
1145 void *buf, int flags, ext2_ino_t ino);
1146 extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
1147 void *buf);
1148 extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
1149 void *buf, int flags);
1150 extern errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block,
1151 void *buf, int flags);
1152 extern errcode_t ext2fs_write_dir_block4(ext2_filsys fs, blk64_t block,
1153 void *buf, int flags, ext2_ino_t ino);
1154
1155 /* dirhash.c */
1156 extern errcode_t ext2fs_dirhash(int version, const char *name, int len,
1157 const __u32 *seed,
1158 ext2_dirhash_t *ret_hash,
1159 ext2_dirhash_t *ret_minor_hash);
1160
1161
1162 /* dir_iterate.c */
1163 extern errcode_t ext2fs_get_rec_len(ext2_filsys fs,
1164 struct ext2_dir_entry *dirent,
1165 unsigned int *rec_len);
1166 extern errcode_t ext2fs_set_rec_len(ext2_filsys fs,
1167 unsigned int len,
1168 struct ext2_dir_entry *dirent);
1169 extern errcode_t ext2fs_dir_iterate(ext2_filsys fs,
1170 ext2_ino_t dir,
1171 int flags,
1172 char *block_buf,
1173 int (*func)(struct ext2_dir_entry *dirent,
1174 int offset,
1175 int blocksize,
1176 char *buf,
1177 void *priv_data),
1178 void *priv_data);
1179 extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs,
1180 ext2_ino_t dir,
1181 int flags,
1182 char *block_buf,
1183 int (*func)(ext2_ino_t dir,
1184 int entry,
1185 struct ext2_dir_entry *dirent,
1186 int offset,
1187 int blocksize,
1188 char *buf,
1189 void *priv_data),
1190 void *priv_data);
1191
1192 /* dupfs.c */
1193 extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest);
1194
1195 /* expanddir.c */
1196 extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir);
1197
1198 /* ext_attr.c */
1199 extern __u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry,
1200 void *data);
1201 extern errcode_t ext2fs_ext_attr_hash_entry2(ext2_filsys fs,
1202 struct ext2_ext_attr_entry *entry,
1203 void *data, __u32 *hash);
1204 extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf);
1205 extern errcode_t ext2fs_read_ext_attr2(ext2_filsys fs, blk64_t block,
1206 void *buf);
1207 extern errcode_t ext2fs_read_ext_attr3(ext2_filsys fs, blk64_t block,
1208 void *buf, ext2_ino_t inum);
1209 extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block,
1210 void *buf);
1211 extern errcode_t ext2fs_write_ext_attr2(ext2_filsys fs, blk64_t block,
1212 void *buf);
1213 extern errcode_t ext2fs_write_ext_attr3(ext2_filsys fs, blk64_t block,
1214 void *buf, ext2_ino_t inum);
1215 extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,
1216 char *block_buf,
1217 int adjust, __u32 *newcount);
1218 extern errcode_t ext2fs_adjust_ea_refcount2(ext2_filsys fs, blk64_t blk,
1219 char *block_buf,
1220 int adjust, __u32 *newcount);
1221 extern errcode_t ext2fs_adjust_ea_refcount3(ext2_filsys fs, blk64_t blk,
1222 char *block_buf,
1223 int adjust, __u32 *newcount,
1224 ext2_ino_t inum);
1225 errcode_t ext2fs_xattrs_write(struct ext2_xattr_handle *handle);
1226 errcode_t ext2fs_xattrs_read(struct ext2_xattr_handle *handle);
1227 errcode_t ext2fs_xattrs_iterate(struct ext2_xattr_handle *h,
1228 int (*func)(char *name, char *value,
1229 size_t value_len, void *data),
1230 void *data);
1231 errcode_t ext2fs_xattr_get(struct ext2_xattr_handle *h, const char *key,
1232 void **value, size_t *value_len);
1233 errcode_t ext2fs_xattr_set(struct ext2_xattr_handle *handle,
1234 const char *key,
1235 const void *value,
1236 size_t value_len);
1237 errcode_t ext2fs_xattr_remove(struct ext2_xattr_handle *handle,
1238 const char *key);
1239 errcode_t ext2fs_xattrs_open(ext2_filsys fs, ext2_ino_t ino,
1240 struct ext2_xattr_handle **handle);
1241 errcode_t ext2fs_xattrs_close(struct ext2_xattr_handle **handle);
1242 errcode_t ext2fs_free_ext_attr(ext2_filsys fs, ext2_ino_t ino,
1243 struct ext2_inode_large *inode);
1244 errcode_t ext2fs_xattrs_count(struct ext2_xattr_handle *handle, size_t *count);
1245 errcode_t ext2fs_xattr_inode_max_size(ext2_filsys fs, ext2_ino_t ino,
1246 size_t *size);
1247 #define XATTR_HANDLE_FLAG_RAW 0x0001
1248 errcode_t ext2fs_xattrs_flags(struct ext2_xattr_handle *handle,
1249 unsigned int *new_flags, unsigned int *old_flags);
1250
1251 /* extent.c */
1252 extern errcode_t ext2fs_extent_header_verify(void *ptr, int size);
1253 extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino,
1254 ext2_extent_handle_t *handle);
1255 extern errcode_t ext2fs_extent_open2(ext2_filsys fs, ext2_ino_t ino,
1256 struct ext2_inode *inode,
1257 ext2_extent_handle_t *ret_handle);
1258 extern void ext2fs_extent_free(ext2_extent_handle_t handle);
1259 extern errcode_t ext2fs_extent_get(ext2_extent_handle_t handle,
1260 int flags, struct ext2fs_extent *extent);
1261 extern errcode_t ext2fs_extent_node_split(ext2_extent_handle_t handle);
1262 extern errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle, int flags,
1263 struct ext2fs_extent *extent);
1264 extern errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags,
1265 struct ext2fs_extent *extent);
1266 extern errcode_t ext2fs_extent_set_bmap(ext2_extent_handle_t handle,
1267 blk64_t logical, blk64_t physical,
1268 int flags);
1269 extern errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags);
1270 extern errcode_t ext2fs_extent_get_info(ext2_extent_handle_t handle,
1271 struct ext2_extent_info *info);
1272 extern errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle,
1273 blk64_t blk);
1274 extern errcode_t ext2fs_extent_goto2(ext2_extent_handle_t handle,
1275 int leaf_level, blk64_t blk);
1276 extern errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle);
1277 size_t ext2fs_max_extent_depth(ext2_extent_handle_t handle);
1278
1279 /* fallocate.c */
1280 #define EXT2_FALLOCATE_ZERO_BLOCKS (0x1)
1281 #define EXT2_FALLOCATE_FORCE_INIT (0x2)
1282 #define EXT2_FALLOCATE_FORCE_UNINIT (0x4)
1283 #define EXT2_FALLOCATE_INIT_BEYOND_EOF (0x8)
1284 #define EXT2_FALLOCATE_ALL_FLAGS (0xF)
1285 errcode_t ext2fs_fallocate(ext2_filsys fs, int flags, ext2_ino_t ino,
1286 struct ext2_inode *inode, blk64_t goal,
1287 blk64_t start, blk64_t len);
1288
1289 /* fileio.c */
1290 extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino,
1291 struct ext2_inode *inode,
1292 int flags, ext2_file_t *ret);
1293 extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino,
1294 int flags, ext2_file_t *ret);
1295 extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file);
1296 struct ext2_inode *ext2fs_file_get_inode(ext2_file_t file);
1297 extern ext2_ino_t ext2fs_file_get_inode_num(ext2_file_t file);
1298 extern errcode_t ext2fs_file_close(ext2_file_t file);
1299 extern errcode_t ext2fs_file_flush(ext2_file_t file);
1300 extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf,
1301 unsigned int wanted, unsigned int *got);
1302 extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf,
1303 unsigned int nbytes, unsigned int *written);
1304 extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset,
1305 int whence, __u64 *ret_pos);
1306 extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset,
1307 int whence, ext2_off_t *ret_pos);
1308 errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size);
1309 extern ext2_off_t ext2fs_file_get_size(ext2_file_t file);
1310 extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size);
1311 extern errcode_t ext2fs_file_set_size2(ext2_file_t file, ext2_off64_t size);
1312
1313 /* finddev.c */
1314 extern char *ext2fs_find_block_device(dev_t device);
1315
1316 /* flushb.c */
1317 extern errcode_t ext2fs_sync_device(int fd, int flushb);
1318
1319 /* freefs.c */
1320 extern void ext2fs_free(ext2_filsys fs);
1321 extern void ext2fs_free_dblist(ext2_dblist dblist);
1322 extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb);
1323 extern void ext2fs_u32_list_free(ext2_u32_list bb);
1324
1325 /* gen_bitmap.c */
1326 extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap);
1327 extern errcode_t ext2fs_make_generic_bitmap(errcode_t magic, ext2_filsys fs,
1328 __u32 start, __u32 end,
1329 __u32 real_end,
1330 const char *descr, char *init_map,
1331 ext2fs_generic_bitmap *ret);
1332 extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start,
1333 __u32 end,
1334 __u32 real_end,
1335 const char *descr,
1336 ext2fs_generic_bitmap *ret);
1337 extern errcode_t ext2fs_copy_generic_bitmap(ext2fs_generic_bitmap src,
1338 ext2fs_generic_bitmap *dest);
1339 extern void ext2fs_clear_generic_bitmap(ext2fs_generic_bitmap bitmap);
1340 extern errcode_t ext2fs_fudge_generic_bitmap_end(ext2fs_inode_bitmap bitmap,
1341 errcode_t magic,
1342 errcode_t neq,
1343 ext2_ino_t end,
1344 ext2_ino_t *oend);
1345 extern void ext2fs_set_generic_bitmap_padding(ext2fs_generic_bitmap map);
1346 extern errcode_t ext2fs_resize_generic_bitmap(errcode_t magic,
1347 __u32 new_end,
1348 __u32 new_real_end,
1349 ext2fs_generic_bitmap bmap);
1350 extern errcode_t ext2fs_compare_generic_bitmap(errcode_t magic, errcode_t neq,
1351 ext2fs_generic_bitmap bm1,
1352 ext2fs_generic_bitmap bm2);
1353 extern errcode_t ext2fs_get_generic_bitmap_range(ext2fs_generic_bitmap bmap,
1354 errcode_t magic,
1355 __u32 start, __u32 num,
1356 void *out);
1357 extern errcode_t ext2fs_set_generic_bitmap_range(ext2fs_generic_bitmap bmap,
1358 errcode_t magic,
1359 __u32 start, __u32 num,
1360 void *in);
1361 extern errcode_t ext2fs_find_first_zero_generic_bitmap(ext2fs_generic_bitmap bitmap,
1362 __u32 start, __u32 end,
1363 __u32 *out);
1364 extern errcode_t ext2fs_find_first_set_generic_bitmap(ext2fs_generic_bitmap bitmap,
1365 __u32 start, __u32 end,
1366 __u32 *out);
1367
1368 /* gen_bitmap64.c */
1369 void ext2fs_free_generic_bmap(ext2fs_generic_bitmap bmap);
1370 errcode_t ext2fs_alloc_generic_bmap(ext2_filsys fs, errcode_t magic,
1371 int type, __u64 start, __u64 end,
1372 __u64 real_end,
1373 const char *descr,
1374 ext2fs_generic_bitmap *ret);
1375 errcode_t ext2fs_copy_generic_bmap(ext2fs_generic_bitmap src,
1376 ext2fs_generic_bitmap *dest);
1377 void ext2fs_clear_generic_bmap(ext2fs_generic_bitmap bitmap);
1378 errcode_t ext2fs_fudge_generic_bmap_end(ext2fs_generic_bitmap bitmap,
1379 errcode_t neq,
1380 __u64 end, __u64 *oend);
1381 void ext2fs_set_generic_bmap_padding(ext2fs_generic_bitmap bmap);
1382 errcode_t ext2fs_resize_generic_bmap(ext2fs_generic_bitmap bmap,
1383 __u64 new_end,
1384 __u64 new_real_end);
1385 errcode_t ext2fs_compare_generic_bmap(errcode_t neq,
1386 ext2fs_generic_bitmap bm1,
1387 ext2fs_generic_bitmap bm2);
1388 errcode_t ext2fs_get_generic_bmap_range(ext2fs_generic_bitmap bmap,
1389 __u64 start, unsigned int num,
1390 void *out);
1391 errcode_t ext2fs_set_generic_bmap_range(ext2fs_generic_bitmap bmap,
1392 __u64 start, unsigned int num,
1393 void *in);
1394 errcode_t ext2fs_convert_subcluster_bitmap(ext2_filsys fs,
1395 ext2fs_block_bitmap *bitmap);
1396
1397 /* get_num_dirs.c */
1398 extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs);
1399
1400 /* getsize.c */
1401 extern errcode_t ext2fs_get_device_size(const char *file, int blocksize,
1402 blk_t *retblocks);
1403 extern errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
1404 blk64_t *retblocks);
1405
1406 /* getsectsize.c */
1407 extern int ext2fs_get_dio_alignment(int fd);
1408 errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize);
1409 errcode_t ext2fs_get_device_phys_sectsize(const char *file, int *sectsize);
1410
1411 /* i_block.c */
1412 errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
1413 blk64_t num_blocks);
1414 errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode,
1415 blk64_t num_blocks);
1416 errcode_t ext2fs_iblk_set(ext2_filsys fs, struct ext2_inode *inode, blk64_t b);
1417
1418 /* imager.c */
1419 extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags);
1420 extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags);
1421 extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags);
1422 extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags);
1423 extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags);
1424 extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags);
1425
1426 /* ind_block.c */
1427 errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf);
1428 errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf);
1429
1430 /* initialize.c */
1431 extern errcode_t ext2fs_initialize(const char *name, int flags,
1432 struct ext2_super_block *param,
1433 io_manager manager, ext2_filsys *ret_fs);
1434
1435 /* icount.c */
1436 extern void ext2fs_free_icount(ext2_icount_t icount);
1437 extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir,
1438 int flags, ext2_icount_t *ret);
1439 extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags,
1440 unsigned int size,
1441 ext2_icount_t hint, ext2_icount_t *ret);
1442 extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags,
1443 unsigned int size,
1444 ext2_icount_t *ret);
1445 extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino,
1446 __u16 *ret);
1447 extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino,
1448 __u16 *ret);
1449 extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino,
1450 __u16 *ret);
1451 extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino,
1452 __u16 count);
1453 extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount);
1454 errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *);
1455
1456 /* inline.c */
1457
1458 extern errcode_t ext2fs_get_memalign(unsigned long size,
1459 unsigned long align, void *ptr);
1460
1461 /* inline_data.c */
1462 extern errcode_t ext2fs_inline_data_init(ext2_filsys fs, ext2_ino_t ino);
1463 extern errcode_t ext2fs_inline_data_size(ext2_filsys fs, ext2_ino_t ino,
1464 size_t *size);
1465 extern errcode_t ext2fs_inline_data_get(ext2_filsys fs, ext2_ino_t ino,
1466 struct ext2_inode *inode,
1467 void *buf, size_t *size);
1468 extern errcode_t ext2fs_inline_data_set(ext2_filsys fs, ext2_ino_t ino,
1469 struct ext2_inode *inode,
1470 void *buf, size_t size);
1471
1472 /* inode.c */
1473 extern errcode_t ext2fs_create_inode_cache(ext2_filsys fs,
1474 unsigned int cache_size);
1475 extern void ext2fs_free_inode_cache(struct ext2_inode_cache *icache);
1476 extern errcode_t ext2fs_flush_icache(ext2_filsys fs);
1477 extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan,
1478 ext2_ino_t *ino,
1479 struct ext2_inode *inode,
1480 int bufsize);
1481 #define EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS 8
1482 extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks,
1483 ext2_inode_scan *ret_scan);
1484 extern void ext2fs_close_inode_scan(ext2_inode_scan scan);
1485 extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino,
1486 struct ext2_inode *inode);
1487 extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan,
1488 int group);
1489 extern void ext2fs_set_inode_callback
1490 (ext2_inode_scan scan,
1491 errcode_t (*done_group)(ext2_filsys fs,
1492 ext2_inode_scan scan,
1493 dgrp_t group,
1494 void * priv_data),
1495 void *done_group_data);
1496 extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags,
1497 int clear_flags);
1498 extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
1499 struct ext2_inode * inode,
1500 int bufsize);
1501 extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino,
1502 struct ext2_inode * inode);
1503 extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
1504 struct ext2_inode * inode,
1505 int bufsize);
1506 extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino,
1507 struct ext2_inode * inode);
1508 extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino,
1509 struct ext2_inode * inode);
1510 extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
1511 extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino);
1512
1513 /* inode_io.c */
1514 extern io_manager inode_io_manager;
1515 extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino,
1516 char **name);
1517 extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino,
1518 struct ext2_inode *inode,
1519 char **name);
1520
1521 /* ismounted.c */
1522 extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags);
1523 extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
1524 char *mtpt, int mtlen);
1525
1526 /* punch.c */
1527 /*
1528 * NOTE: This function removes from an inode the blocks "start", "end", and
1529 * every block in between.
1530 */
1531 extern errcode_t ext2fs_punch(ext2_filsys fs, ext2_ino_t ino,
1532 struct ext2_inode *inode,
1533 char *block_buf, blk64_t start,
1534 blk64_t end);
1535
1536 /* namei.c */
1537 extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name,
1538 int namelen, char *buf, ext2_ino_t *inode);
1539 extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1540 const char *name, ext2_ino_t *inode);
1541 errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1542 const char *name, ext2_ino_t *inode);
1543 extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1544 ext2_ino_t inode, ext2_ino_t *res_inode);
1545
1546 /* native.c */
1547 int ext2fs_native_flag(void);
1548
1549 /* newdir.c */
1550 extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
1551 ext2_ino_t parent_ino, char **block);
1552 extern errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs, ext2_ino_t dir_ino,
1553 ext2_ino_t parent_ino, __u32 *iblock);
1554
1555 /* mkdir.c */
1556 extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
1557 const char *name);
1558
1559 /* mkjournal.c */
1560 extern errcode_t ext2fs_zero_blocks(ext2_filsys fs, blk_t blk, int num,
1561 blk_t *ret_blk, int *ret_count);
1562 extern errcode_t ext2fs_zero_blocks2(ext2_filsys fs, blk64_t blk, int num,
1563 blk64_t *ret_blk, int *ret_count);
1564 extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
1565 __u32 num_blocks, int flags,
1566 char **ret_jsb);
1567 extern errcode_t ext2fs_add_journal_device(ext2_filsys fs,
1568 ext2_filsys journal_dev);
1569 extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t num_blocks,
1570 int flags);
1571 extern errcode_t ext2fs_add_journal_inode2(ext2_filsys fs, blk_t num_blocks,
1572 blk64_t goal, int flags);
1573 extern int ext2fs_default_journal_size(__u64 num_blocks);
1574 extern int ext2fs_journal_sb_start(int blocksize);
1575
1576 /* openfs.c */
1577 extern errcode_t ext2fs_open(const char *name, int flags, int superblock,
1578 unsigned int block_size, io_manager manager,
1579 ext2_filsys *ret_fs);
1580 extern errcode_t ext2fs_open2(const char *name, const char *io_options,
1581 int flags, int superblock,
1582 unsigned int block_size, io_manager manager,
1583 ext2_filsys *ret_fs);
1584 /*
1585 * The dgrp_t argument to these two functions is not actually a group number
1586 * but a block number offset within a group table! Convert with the formula
1587 * (group_number / groups_per_block).
1588 */
1589 extern blk64_t ext2fs_descriptor_block_loc2(ext2_filsys fs,
1590 blk64_t group_block, dgrp_t i);
1591 extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block,
1592 dgrp_t i);
1593 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io);
1594 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io);
1595 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io);
1596
1597 /* get_pathname.c */
1598 extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
1599 char **name);
1600
1601 /* link.c */
1602 errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name,
1603 ext2_ino_t ino, int flags);
1604 errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name,
1605 ext2_ino_t ino, int flags);
1606
1607 /* symlink.c */
1608 errcode_t ext2fs_symlink(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t ino,
1609 const char *name, const char *target);
1610
1611 /* mmp.c */
1612 errcode_t ext2fs_mmp_read(ext2_filsys fs, blk64_t mmp_blk, void *buf);
1613 errcode_t ext2fs_mmp_write(ext2_filsys fs, blk64_t mmp_blk, void *buf);
1614 errcode_t ext2fs_mmp_clear(ext2_filsys fs);
1615 errcode_t ext2fs_mmp_init(ext2_filsys fs);
1616 errcode_t ext2fs_mmp_start(ext2_filsys fs);
1617 errcode_t ext2fs_mmp_update(ext2_filsys fs);
1618 errcode_t ext2fs_mmp_update2(ext2_filsys fs, int immediately);
1619 errcode_t ext2fs_mmp_stop(ext2_filsys fs);
1620 unsigned ext2fs_mmp_new_seq(void);
1621
1622 /* read_bb.c */
1623 extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs,
1624 ext2_badblocks_list *bb_list);
1625
1626 /* read_bb_file.c */
1627 extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f,
1628 ext2_badblocks_list *bb_list,
1629 void *priv_data,
1630 void (*invalid)(ext2_filsys fs,
1631 blk_t blk,
1632 char *badstr,
1633 void *priv_data));
1634 extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f,
1635 ext2_badblocks_list *bb_list,
1636 void (*invalid)(ext2_filsys fs,
1637 blk_t blk));
1638
1639 /* res_gdt.c */
1640 extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs);
1641
1642 /*sha256.c */
1643 #define EXT2FS_SHA256_LENGTH 32
1644 #if 0
1645 extern void ext2fs_sha256(const unsigned char *in, unsigned long in_size,
1646 unsigned char out[EXT2FS_SHA256_LENGTH]);
1647 #endif
1648
1649 /* sha512.c */
1650 #define EXT2FS_SHA512_LENGTH 64
1651 extern void ext2fs_sha512(const unsigned char *in, unsigned long in_size,
1652 unsigned char out[EXT2FS_SHA512_LENGTH]);
1653
1654 /* swapfs.c */
1655 extern errcode_t ext2fs_dirent_swab_in2(ext2_filsys fs, char *buf, size_t size,
1656 int flags);
1657 extern errcode_t ext2fs_dirent_swab_in(ext2_filsys fs, char *buf, int flags);
1658 extern errcode_t ext2fs_dirent_swab_out2(ext2_filsys fs, char *buf, size_t size,
1659 int flags);
1660 extern errcode_t ext2fs_dirent_swab_out(ext2_filsys fs, char *buf, int flags);
1661 extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize,
1662 int has_header);
1663 extern void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
1664 struct ext2_ext_attr_header *from_hdr);
1665 extern void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
1666 struct ext2_ext_attr_entry *from_entry);
1667 extern void ext2fs_swap_super(struct ext2_super_block * super);
1668 extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp);
1669 extern void ext2fs_swap_group_desc2(ext2_filsys, struct ext2_group_desc *gdp);
1670 extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
1671 struct ext2_inode_large *f, int hostorder,
1672 int bufsize);
1673 extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t,
1674 struct ext2_inode *f, int hostorder);
1675 extern void ext2fs_swap_mmp(struct mmp_struct *mmp);
1676
1677 /* unix_io.c */
1678 extern int ext2fs_open_file(const char *pathname, int flags, mode_t mode);
1679 extern int ext2fs_stat(const char *path, ext2fs_struct_stat *buf);
1680 extern int ext2fs_fstat(int fd, ext2fs_struct_stat *buf);
1681
1682 /* valid_blk.c */
1683 extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode);
1684 extern int ext2fs_inode_has_valid_blocks2(ext2_filsys fs,
1685 struct ext2_inode *inode);
1686
1687 /* version.c */
1688 extern int ext2fs_parse_version_string(const char *ver_string);
1689 extern int ext2fs_get_library_version(const char **ver_string,
1690 const char **date_string);
1691
1692 /* write_bb_file.c */
1693 extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list,
1694 unsigned int flags,
1695 FILE *f);
1696
1697
1698 /* inline functions */
1699 #ifdef NO_INLINE_FUNCS
1700 extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr);
1701 extern errcode_t ext2fs_get_memzero(unsigned long size, void *ptr);
1702 extern errcode_t ext2fs_get_array(unsigned long count,
1703 unsigned long size, void *ptr);
1704 extern errcode_t ext2fs_get_arrayzero(unsigned long count,
1705 unsigned long size, void *ptr);
1706 extern errcode_t ext2fs_free_mem(void *ptr);
1707 extern errcode_t ext2fs_resize_mem(unsigned long old_size,
1708 unsigned long size, void *ptr);
1709 extern void ext2fs_mark_super_dirty(ext2_filsys fs);
1710 extern void ext2fs_mark_changed(ext2_filsys fs);
1711 extern int ext2fs_test_changed(ext2_filsys fs);
1712 extern void ext2fs_mark_valid(ext2_filsys fs);
1713 extern void ext2fs_unmark_valid(ext2_filsys fs);
1714 extern int ext2fs_test_valid(ext2_filsys fs);
1715 extern void ext2fs_mark_ib_dirty(ext2_filsys fs);
1716 extern void ext2fs_mark_bb_dirty(ext2_filsys fs);
1717 extern int ext2fs_test_ib_dirty(ext2_filsys fs);
1718 extern int ext2fs_test_bb_dirty(ext2_filsys fs);
1719 extern dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk);
1720 extern dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino);
1721 extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group);
1722 extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group);
1723 extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1724 struct ext2_inode *inode);
1725 extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b);
1726 extern __u64 ext2fs_div64_ceil(__u64 a, __u64 b);
1727 extern int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry);
1728 extern void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len);
1729 extern int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry);
1730 extern void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type);
1731 extern struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode);
1732 extern const struct ext2_inode *ext2fs_const_inode(const struct ext2_inode_large * large_inode);
1733
1734 #endif
1735
1736 /*
1737 * The actual inlined functions definitions themselves...
1738 *
1739 * If NO_INLINE_FUNCS is defined, then we won't try to do inline
1740 * functions at all!
1741 */
1742 #if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
1743 #ifdef INCLUDE_INLINE_FUNCS
1744 #define _INLINE_ extern
1745 #else
1746 #if (__STDC_VERSION__ >= 199901L)
1747 #define _INLINE_ inline
1748 #else
1749 #ifdef __GNUC__
1750 #define _INLINE_ extern __inline__
1751 #else /* For Watcom C */
1752 #define _INLINE_ extern inline
1753 #endif /* __GNUC__ */
1754 #endif /* __STDC_VERSION__ >= 199901L */
1755 #endif
1756
1757 #ifndef EXT2_CUSTOM_MEMORY_ROUTINES
1758 #include <string.h>
1759 /*
1760 * Allocate memory. The 'ptr' arg must point to a pointer.
1761 */
1762 _INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
1763 {
1764 void *pp;
1765
1766 pp = malloc(size);
1767 if (!pp)
1768 return EXT2_ET_NO_MEMORY;
1769 memcpy(ptr, &pp, sizeof (pp));
1770 return 0;
1771 }
1772
1773 _INLINE_ errcode_t ext2fs_get_memzero(unsigned long size, void *ptr)
1774 {
1775 void *pp;
1776
1777 pp = malloc(size);
1778 if (!pp)
1779 return EXT2_ET_NO_MEMORY;
1780 memset(pp, 0, size);
1781 memcpy(ptr, &pp, sizeof(pp));
1782 return 0;
1783 }
1784
1785 _INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr)
1786 {
1787 if (count && (~0UL)/count < size)
1788 return EXT2_ET_NO_MEMORY;
1789 return ext2fs_get_mem(count*size, ptr);
1790 }
1791
1792 _INLINE_ errcode_t ext2fs_get_arrayzero(unsigned long count,
1793 unsigned long size, void *ptr)
1794 {
1795 void *pp;
1796
1797 if (count && (~0UL)/count < size)
1798 return EXT2_ET_NO_MEMORY;
1799 pp = calloc(count, size);
1800 if (!pp)
1801 return EXT2_ET_NO_MEMORY;
1802 memcpy(ptr, &pp, sizeof(pp));
1803 return 0;
1804 }
1805
1806 /*
1807 * Free memory. The 'ptr' arg must point to a pointer.
1808 */
1809 _INLINE_ errcode_t ext2fs_free_mem(void *ptr)
1810 {
1811 void *p;
1812
1813 memcpy(&p, ptr, sizeof(p));
1814 free(p);
1815 p = 0;
1816 memcpy(ptr, &p, sizeof(p));
1817 return 0;
1818 }
1819
1820 /*
1821 * Resize memory. The 'ptr' arg must point to a pointer.
1822 */
1823 _INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
1824 unsigned long size, void *ptr)
1825 {
1826 void *p;
1827
1828 /* Use "memcpy" for pointer assignments here to avoid problems
1829 * with C99 strict type aliasing rules. */
1830 memcpy(&p, ptr, sizeof(p));
1831 p = realloc(p, size);
1832 if (!p)
1833 return EXT2_ET_NO_MEMORY;
1834 memcpy(ptr, &p, sizeof(p));
1835 return 0;
1836 }
1837 #endif /* Custom memory routines */
1838
1839 /*
1840 * Mark a filesystem superblock as dirty
1841 */
1842 _INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs)
1843 {
1844 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED;
1845 }
1846
1847 /*
1848 * Mark a filesystem as changed
1849 */
1850 _INLINE_ void ext2fs_mark_changed(ext2_filsys fs)
1851 {
1852 fs->flags |= EXT2_FLAG_CHANGED;
1853 }
1854
1855 /*
1856 * Check to see if a filesystem has changed
1857 */
1858 _INLINE_ int ext2fs_test_changed(ext2_filsys fs)
1859 {
1860 return (fs->flags & EXT2_FLAG_CHANGED);
1861 }
1862
1863 /*
1864 * Mark a filesystem as valid
1865 */
1866 _INLINE_ void ext2fs_mark_valid(ext2_filsys fs)
1867 {
1868 fs->flags |= EXT2_FLAG_VALID;
1869 }
1870
1871 /*
1872 * Mark a filesystem as NOT valid
1873 */
1874 _INLINE_ void ext2fs_unmark_valid(ext2_filsys fs)
1875 {
1876 fs->flags &= ~EXT2_FLAG_VALID;
1877 }
1878
1879 /*
1880 * Check to see if a filesystem is valid
1881 */
1882 _INLINE_ int ext2fs_test_valid(ext2_filsys fs)
1883 {
1884 return (fs->flags & EXT2_FLAG_VALID);
1885 }
1886
1887 /*
1888 * Mark the inode bitmap as dirty
1889 */
1890 _INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs)
1891 {
1892 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED;
1893 }
1894
1895 /*
1896 * Mark the block bitmap as dirty
1897 */
1898 _INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs)
1899 {
1900 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED;
1901 }
1902
1903 /*
1904 * Check to see if a filesystem's inode bitmap is dirty
1905 */
1906 _INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs)
1907 {
1908 return (fs->flags & EXT2_FLAG_IB_DIRTY);
1909 }
1910
1911 /*
1912 * Check to see if a filesystem's block bitmap is dirty
1913 */
1914 _INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs)
1915 {
1916 return (fs->flags & EXT2_FLAG_BB_DIRTY);
1917 }
1918
1919 /*
1920 * Return the group # of a block
1921 */
1922 _INLINE_ dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
1923 {
1924 return ext2fs_group_of_blk2(fs, blk);
1925 }
1926 /*
1927 * Return the group # of an inode number
1928 */
1929 _INLINE_ dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
1930 {
1931 return (ino - 1) / fs->super->s_inodes_per_group;
1932 }
1933
1934 /*
1935 * Return the first block (inclusive) in a group
1936 */
1937 _INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group)
1938 {
1939 return (blk_t) ext2fs_group_first_block2(fs, group);
1940 }
1941
1942 /*
1943 * Return the last block (inclusive) in a group
1944 */
1945 _INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group)
1946 {
1947 return (blk_t) ext2fs_group_last_block2(fs, group);
1948 }
1949
1950 _INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1951 struct ext2_inode *inode)
1952 {
1953 return (blk_t) ext2fs_inode_data_blocks2(fs, inode);
1954 }
1955
1956 /* htree levels for ext4 */
1957 #define EXT4_HTREE_LEVEL_COMPAT 2
1958 #define EXT4_HTREE_LEVEL 3
1959
1960 static inline unsigned int ext2_dir_htree_level(ext2_filsys fs)
1961 {
1962 if (ext2fs_has_feature_largedir(fs->super))
1963 return EXT4_HTREE_LEVEL;
1964
1965 return EXT4_HTREE_LEVEL_COMPAT;
1966 }
1967
1968 _INLINE_ int ext2fs_htree_intnode_maxrecs(ext2_filsys fs, int blocks)
1969 {
1970 return blocks * ((fs->blocksize - 8) / sizeof(struct ext2_dx_entry));
1971 }
1972
1973 /*
1974 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
1975 */
1976 _INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b)
1977 {
1978 if (!a)
1979 return 0;
1980 return ((a - 1) / b) + 1;
1981 }
1982
1983 _INLINE_ __u64 ext2fs_div64_ceil(__u64 a, __u64 b)
1984 {
1985 if (!a)
1986 return 0;
1987 return ((a - 1) / b) + 1;
1988 }
1989
1990 _INLINE_ int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry)
1991 {
1992 return entry->name_len & 0xff;
1993 }
1994
1995 _INLINE_ void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len)
1996 {
1997 entry->name_len = (entry->name_len & 0xff00) | (len & 0xff);
1998 }
1999
2000 _INLINE_ int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry)
2001 {
2002 return entry->name_len >> 8;
2003 }
2004
2005 _INLINE_ void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type)
2006 {
2007 entry->name_len = (entry->name_len & 0xff) | (type << 8);
2008 }
2009
2010 _INLINE_ struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode)
2011 {
2012 /* It is always safe to convert large inode to a small inode */
2013 return (struct ext2_inode *) large_inode;
2014 }
2015
2016 _INLINE_ const struct ext2_inode *
2017 ext2fs_const_inode(const struct ext2_inode_large * large_inode)
2018 {
2019 /* It is always safe to convert large inode to a small inode */
2020 return (const struct ext2_inode *) large_inode;
2021 }
2022
2023 #undef _INLINE_
2024 #endif
2025
2026 #ifdef __cplusplus
2027 }
2028 #endif
2029
2030 #endif /* _EXT2FS_EXT2FS_H */
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