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_LIB_INCOMPAT_MMP|\
602 EXT4_FEATURE_INCOMPAT_64BIT|\
603 EXT4_FEATURE_INCOMPAT_INLINE_DATA|\
604 EXT4_FEATURE_INCOMPAT_ENCRYPT|\
605 EXT4_FEATURE_INCOMPAT_CSUM_SEED)
606
607 #define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
608 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
609 EXT2_FEATURE_RO_COMPAT_LARGE_FILE|\
610 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\
611 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|\
612 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\
613 EXT4_FEATURE_RO_COMPAT_BIGALLOC|\
614 EXT4_FEATURE_RO_COMPAT_QUOTA|\
615 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
616 EXT4_FEATURE_RO_COMPAT_READONLY |\
617 EXT4_FEATURE_RO_COMPAT_PROJECT)
618
619 /*
620 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed
621 * to ext2fs_openfs()
622 */
623 #define EXT2_LIB_SOFTSUPP_INCOMPAT (0)
624 #define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_REPLICA)
625
626
627 /* Translate a block number to a cluster number */
628 #define EXT2FS_CLUSTER_RATIO(fs) (1 << (fs)->cluster_ratio_bits)
629 #define EXT2FS_CLUSTER_MASK(fs) (EXT2FS_CLUSTER_RATIO(fs) - 1)
630 #define EXT2FS_B2C(fs, blk) ((blk) >> (fs)->cluster_ratio_bits)
631 /* Translate a cluster number to a block number */
632 #define EXT2FS_C2B(fs, cluster) ((cluster) << (fs)->cluster_ratio_bits)
633 /* Translate # of blks to # of clusters */
634 #define EXT2FS_NUM_B2C(fs, blks) (((blks) + EXT2FS_CLUSTER_MASK(fs)) >> \
635 (fs)->cluster_ratio_bits)
636
637 #if defined(HAVE_FSTAT64) && !defined(__OSX_AVAILABLE_BUT_DEPRECATED)
638 typedef struct stat64 ext2fs_struct_stat;
639 #else
640 typedef struct stat ext2fs_struct_stat;
641 #endif
642
643 /*
644 * For ext2fs_close2() and ext2fs_flush2(), this flag allows you to
645 * avoid the fsync call.
646 */
647 #define EXT2_FLAG_FLUSH_NO_SYNC 1
648
649 /*
650 * Modify and iterate extended attributes
651 */
652 struct ext2_xattr_handle;
653 #define XATTR_ABORT 1
654 #define XATTR_CHANGED 2
655
656 /*
657 * function prototypes
658 */
ext2fs_has_group_desc_csum(ext2_filsys fs)659 static inline int ext2fs_has_group_desc_csum(ext2_filsys fs)
660 {
661 return ext2fs_has_feature_metadata_csum(fs->super) ||
662 ext2fs_has_feature_gdt_csum(fs->super);
663 }
664
665 /* 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)666 static inline int ext2fs_needs_large_file_feature(unsigned long long file_size)
667 {
668 return file_size >= 0x80000000ULL;
669 }
670
671 /* alloc.c */
672 extern void ext2fs_clear_block_uninit(ext2_filsys fs, dgrp_t group);
673 extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode,
674 ext2fs_inode_bitmap map, ext2_ino_t *ret);
675 extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
676 ext2fs_block_bitmap map, blk_t *ret);
677 extern errcode_t ext2fs_new_block2(ext2_filsys fs, blk64_t goal,
678 ext2fs_block_bitmap map, blk64_t *ret);
679 extern errcode_t ext2fs_new_block3(ext2_filsys fs, blk64_t goal,
680 ext2fs_block_bitmap map, blk64_t *ret,
681 struct blk_alloc_ctx *ctx);
682 extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start,
683 blk_t finish, int num,
684 ext2fs_block_bitmap map,
685 blk_t *ret);
686 extern errcode_t ext2fs_get_free_blocks2(ext2_filsys fs, blk64_t start,
687 blk64_t finish, int num,
688 ext2fs_block_bitmap map,
689 blk64_t *ret);
690 extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
691 char *block_buf, blk_t *ret);
692 extern errcode_t ext2fs_alloc_block2(ext2_filsys fs, blk64_t goal,
693 char *block_buf, blk64_t *ret);
694 extern errcode_t ext2fs_alloc_block3(ext2_filsys fs, blk64_t goal,
695 char *block_buf, blk64_t *ret,
696 struct blk_alloc_ctx *ctx);
697
698 extern void ext2fs_set_alloc_block_callback(ext2_filsys fs,
699 errcode_t (*func)(ext2_filsys fs,
700 blk64_t goal,
701 blk64_t *ret),
702 errcode_t (**old)(ext2_filsys fs,
703 blk64_t goal,
704 blk64_t *ret));
705 blk64_t ext2fs_find_inode_goal(ext2_filsys fs, ext2_ino_t ino,
706 struct ext2_inode *inode, blk64_t lblk);
707 extern void ext2fs_set_new_range_callback(ext2_filsys fs,
708 errcode_t (*func)(ext2_filsys fs, int flags, blk64_t goal,
709 blk64_t len, blk64_t *pblk, blk64_t *plen),
710 errcode_t (**old)(ext2_filsys fs, int flags, blk64_t goal,
711 blk64_t len, blk64_t *pblk, blk64_t *plen));
712 extern void ext2fs_set_block_alloc_stats_range_callback(ext2_filsys fs,
713 void (*func)(ext2_filsys fs, blk64_t blk,
714 blk_t num, int inuse),
715 void (**old)(ext2_filsys fs, blk64_t blk,
716 blk_t num, int inuse));
717 #define EXT2_NEWRANGE_FIXED_GOAL (0x1)
718 #define EXT2_NEWRANGE_MIN_LENGTH (0x2)
719 #define EXT2_NEWRANGE_ALL_FLAGS (0x3)
720 errcode_t ext2fs_new_range(ext2_filsys fs, int flags, blk64_t goal,
721 blk64_t len, ext2fs_block_bitmap map, blk64_t *pblk,
722 blk64_t *plen);
723 #define EXT2_ALLOCRANGE_FIXED_GOAL (0x1)
724 #define EXT2_ALLOCRANGE_ZERO_BLOCKS (0x2)
725 #define EXT2_ALLOCRANGE_ALL_FLAGS (0x3)
726 errcode_t ext2fs_alloc_range(ext2_filsys fs, int flags, blk64_t goal,
727 blk_t len, blk64_t *ret);
728
729 /* alloc_sb.c */
730 extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
731 dgrp_t group,
732 ext2fs_block_bitmap bmap);
733 extern void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
734 void (*func)(ext2_filsys fs,
735 blk64_t blk,
736 int inuse),
737 void (**old)(ext2_filsys fs,
738 blk64_t blk,
739 int inuse));
740
741 /* alloc_stats.c */
742 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse);
743 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
744 int inuse, int isdir);
745 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse);
746 void ext2fs_block_alloc_stats2(ext2_filsys fs, blk64_t blk, int inuse);
747 void ext2fs_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
748 blk_t num, int inuse);
749
750 /* alloc_tables.c */
751 extern errcode_t ext2fs_allocate_tables(ext2_filsys fs);
752 extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
753 ext2fs_block_bitmap bmap);
754
755 /* badblocks.c */
756 extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size);
757 extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk);
758 extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk);
759 extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk);
760 extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb,
761 ext2_u32_iterate *ret);
762 extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk);
763 extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter);
764 extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest);
765 extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2);
766
767 extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret,
768 int size);
769 extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb,
770 blk_t blk);
771 extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb,
772 blk_t blk);
773 extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk);
774 extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk);
775 extern errcode_t
776 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
777 ext2_badblocks_iterate *ret);
778 extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter,
779 blk_t *blk);
780 extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter);
781 extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
782 ext2_badblocks_list *dest);
783 extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1,
784 ext2_badblocks_list bb2);
785 extern int ext2fs_u32_list_count(ext2_u32_list bb);
786
787 /* bb_compat */
788 extern errcode_t badblocks_list_create(badblocks_list *ret, int size);
789 extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk);
790 extern int badblocks_list_test(badblocks_list bb, blk_t blk);
791 extern errcode_t badblocks_list_iterate_begin(badblocks_list bb,
792 badblocks_iterate *ret);
793 extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk);
794 extern void badblocks_list_iterate_end(badblocks_iterate iter);
795 extern void badblocks_list_free(badblocks_list bb);
796
797 /* bb_inode.c */
798 extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs,
799 ext2_badblocks_list bb_list);
800
801 /* bitmaps.c */
802 extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap);
803 extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap);
804 extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
805 ext2fs_generic_bitmap *dest);
806 extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs);
807 extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs);
808 extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs);
809 extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs);
810 extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
811 const char *descr,
812 ext2fs_block_bitmap *ret);
813 extern errcode_t ext2fs_allocate_subcluster_bitmap(ext2_filsys fs,
814 const char *descr,
815 ext2fs_block_bitmap *ret);
816 extern int ext2fs_get_bitmap_granularity(ext2fs_block_bitmap bitmap);
817 extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
818 const char *descr,
819 ext2fs_inode_bitmap *ret);
820 extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
821 ext2_ino_t end, ext2_ino_t *oend);
822 extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
823 blk_t end, blk_t *oend);
824 extern errcode_t ext2fs_fudge_block_bitmap_end2(ext2fs_block_bitmap bitmap,
825 blk64_t end, blk64_t *oend);
826 extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap);
827 extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap);
828 extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs);
829 extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs);
830 extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
831 ext2fs_inode_bitmap bmap);
832 extern errcode_t ext2fs_resize_inode_bitmap2(__u64 new_end,
833 __u64 new_real_end,
834 ext2fs_inode_bitmap bmap);
835 extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
836 ext2fs_block_bitmap bmap);
837 extern errcode_t ext2fs_resize_block_bitmap2(__u64 new_end,
838 __u64 new_real_end,
839 ext2fs_block_bitmap bmap);
840 extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
841 ext2fs_block_bitmap bm2);
842 extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
843 ext2fs_inode_bitmap bm2);
844 extern errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap,
845 ext2_ino_t start, unsigned int num,
846 void *in);
847 extern errcode_t ext2fs_set_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
848 __u64 start, size_t num,
849 void *in);
850 extern errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap,
851 ext2_ino_t start, unsigned int num,
852 void *out);
853 extern errcode_t ext2fs_get_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
854 __u64 start, size_t num,
855 void *out);
856 extern errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap,
857 blk_t start, unsigned int num,
858 void *in);
859 extern errcode_t ext2fs_set_block_bitmap_range2(ext2fs_block_bitmap bmap,
860 blk64_t start, size_t num,
861 void *in);
862 extern errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap,
863 blk_t start, unsigned int num,
864 void *out);
865 extern errcode_t ext2fs_get_block_bitmap_range2(ext2fs_block_bitmap bmap,
866 blk64_t start, size_t num,
867 void *out);
868
869 /* blknum.c */
870 extern __u32 ext2fs_inode_bitmap_checksum(ext2_filsys fs, dgrp_t group);
871 extern __u32 ext2fs_block_bitmap_checksum(ext2_filsys fs, dgrp_t group);
872 extern dgrp_t ext2fs_group_of_blk2(ext2_filsys fs, blk64_t);
873 extern blk64_t ext2fs_group_first_block2(ext2_filsys fs, dgrp_t group);
874 extern blk64_t ext2fs_group_last_block2(ext2_filsys fs, dgrp_t group);
875 extern int ext2fs_group_blocks_count(ext2_filsys fs, dgrp_t group);
876 extern blk64_t ext2fs_inode_data_blocks2(ext2_filsys fs,
877 struct ext2_inode *inode);
878 extern blk64_t ext2fs_inode_i_blocks(ext2_filsys fs,
879 struct ext2_inode *inode);
880 extern blk64_t ext2fs_blocks_count(struct ext2_super_block *super);
881 extern void ext2fs_blocks_count_set(struct ext2_super_block *super,
882 blk64_t blk);
883 extern void ext2fs_blocks_count_add(struct ext2_super_block *super,
884 blk64_t blk);
885 extern blk64_t ext2fs_r_blocks_count(struct ext2_super_block *super);
886 extern void ext2fs_r_blocks_count_set(struct ext2_super_block *super,
887 blk64_t blk);
888 extern void ext2fs_r_blocks_count_add(struct ext2_super_block *super,
889 blk64_t blk);
890 extern blk64_t ext2fs_free_blocks_count(struct ext2_super_block *super);
891 extern void ext2fs_free_blocks_count_set(struct ext2_super_block *super,
892 blk64_t blk);
893 extern void ext2fs_free_blocks_count_add(struct ext2_super_block *super,
894 blk64_t blk);
895 /* Block group descriptor accessor functions */
896 extern struct ext2_group_desc *ext2fs_group_desc(ext2_filsys fs,
897 struct opaque_ext2_group_desc *gdp,
898 dgrp_t group);
899 extern blk64_t ext2fs_block_bitmap_csum(ext2_filsys fs, dgrp_t group);
900 extern blk64_t ext2fs_block_bitmap_loc(ext2_filsys fs, dgrp_t group);
901 extern void ext2fs_block_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
902 blk64_t blk);
903 extern __u32 ext2fs_inode_bitmap_csum(ext2_filsys fs, dgrp_t group);
904 extern blk64_t ext2fs_inode_bitmap_loc(ext2_filsys fs, dgrp_t group);
905 extern void ext2fs_inode_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
906 blk64_t blk);
907 extern blk64_t ext2fs_inode_table_loc(ext2_filsys fs, dgrp_t group);
908 extern void ext2fs_inode_table_loc_set(ext2_filsys fs, dgrp_t group,
909 blk64_t blk);
910 extern __u32 ext2fs_bg_free_blocks_count(ext2_filsys fs, dgrp_t group);
911 extern void ext2fs_bg_free_blocks_count_set(ext2_filsys fs, dgrp_t group,
912 __u32 n);
913 extern __u32 ext2fs_bg_free_inodes_count(ext2_filsys fs, dgrp_t group);
914 extern void ext2fs_bg_free_inodes_count_set(ext2_filsys fs, dgrp_t group,
915 __u32 n);
916 extern __u32 ext2fs_bg_used_dirs_count(ext2_filsys fs, dgrp_t group);
917 extern void ext2fs_bg_used_dirs_count_set(ext2_filsys fs, dgrp_t group,
918 __u32 n);
919 extern __u32 ext2fs_bg_itable_unused(ext2_filsys fs, dgrp_t group);
920 extern void ext2fs_bg_itable_unused_set(ext2_filsys fs, dgrp_t group,
921 __u32 n);
922 extern __u16 ext2fs_bg_flags(ext2_filsys fs, dgrp_t group);
923 extern void ext2fs_bg_flags_zap(ext2_filsys fs, dgrp_t group);
924 extern int ext2fs_bg_flags_test(ext2_filsys fs, dgrp_t group, __u16 bg_flag);
925 extern void ext2fs_bg_flags_set(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
926 extern void ext2fs_bg_flags_clear(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
927 extern __u16 ext2fs_bg_checksum(ext2_filsys fs, dgrp_t group);
928 extern void ext2fs_bg_checksum_set(ext2_filsys fs, dgrp_t group, __u16 checksum);
929 extern blk64_t ext2fs_file_acl_block(ext2_filsys fs,
930 const struct ext2_inode *inode);
931 extern void ext2fs_file_acl_block_set(ext2_filsys fs,
932 struct ext2_inode *inode, blk64_t blk);
933 extern errcode_t ext2fs_inode_size_set(ext2_filsys fs, struct ext2_inode *inode,
934 ext2_off64_t size);
935
936 /* block.c */
937 extern errcode_t ext2fs_block_iterate(ext2_filsys fs,
938 ext2_ino_t ino,
939 int flags,
940 char *block_buf,
941 int (*func)(ext2_filsys fs,
942 blk_t *blocknr,
943 int blockcnt,
944 void *priv_data),
945 void *priv_data);
946 errcode_t ext2fs_block_iterate2(ext2_filsys fs,
947 ext2_ino_t ino,
948 int flags,
949 char *block_buf,
950 int (*func)(ext2_filsys fs,
951 blk_t *blocknr,
952 e2_blkcnt_t blockcnt,
953 blk_t ref_blk,
954 int ref_offset,
955 void *priv_data),
956 void *priv_data);
957 errcode_t ext2fs_block_iterate3(ext2_filsys fs,
958 ext2_ino_t ino,
959 int flags,
960 char *block_buf,
961 int (*func)(ext2_filsys fs,
962 blk64_t *blocknr,
963 e2_blkcnt_t blockcnt,
964 blk64_t ref_blk,
965 int ref_offset,
966 void *priv_data),
967 void *priv_data);
968
969 /* bmap.c */
970 extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino,
971 struct ext2_inode *inode,
972 char *block_buf, int bmap_flags,
973 blk_t block, blk_t *phys_blk);
974 extern errcode_t ext2fs_bmap2(ext2_filsys fs, ext2_ino_t ino,
975 struct ext2_inode *inode,
976 char *block_buf, int bmap_flags, blk64_t block,
977 int *ret_flags, blk64_t *phys_blk);
978 errcode_t ext2fs_map_cluster_block(ext2_filsys fs, ext2_ino_t ino,
979 struct ext2_inode *inode, blk64_t lblk,
980 blk64_t *pblk);
981
982 #if 0
983 /* bmove.c */
984 extern errcode_t ext2fs_move_blocks(ext2_filsys fs,
985 ext2fs_block_bitmap reserve,
986 ext2fs_block_bitmap alloc_map,
987 int flags);
988 #endif
989
990 /* check_desc.c */
991 extern errcode_t ext2fs_check_desc(ext2_filsys fs);
992
993 /* closefs.c */
994 extern errcode_t ext2fs_close(ext2_filsys fs);
995 extern errcode_t ext2fs_close2(ext2_filsys fs, int flags);
996 extern errcode_t ext2fs_close_free(ext2_filsys *fs);
997 extern errcode_t ext2fs_flush(ext2_filsys fs);
998 extern errcode_t ext2fs_flush2(ext2_filsys fs, int flags);
999 extern int ext2fs_bg_has_super(ext2_filsys fs, dgrp_t group_block);
1000 extern errcode_t ext2fs_super_and_bgd_loc2(ext2_filsys fs,
1001 dgrp_t group,
1002 blk64_t *ret_super_blk,
1003 blk64_t *ret_old_desc_blk,
1004 blk64_t *ret_new_desc_blk,
1005 blk_t *ret_used_blks);
1006 extern int ext2fs_super_and_bgd_loc(ext2_filsys fs,
1007 dgrp_t group,
1008 blk_t *ret_super_blk,
1009 blk_t *ret_old_desc_blk,
1010 blk_t *ret_new_desc_blk,
1011 int *ret_meta_bg);
1012 extern void ext2fs_update_dynamic_rev(ext2_filsys fs);
1013
1014 /* crc32c.c */
1015 extern __u32 ext2fs_crc32_be(__u32 crc, unsigned char const *p, size_t len);
1016 extern __u32 ext2fs_crc32c_le(__u32 crc, unsigned char const *p, size_t len);
1017
1018 /* csum.c */
1019 extern void ext2fs_init_csum_seed(ext2_filsys fs);
1020 extern errcode_t ext2fs_mmp_csum_set(ext2_filsys fs, struct mmp_struct *mmp);
1021 extern int ext2fs_mmp_csum_verify(ext2_filsys, struct mmp_struct *mmp);
1022 extern int ext2fs_verify_csum_type(ext2_filsys fs, struct ext2_super_block *sb);
1023 extern errcode_t ext2fs_superblock_csum_set(ext2_filsys fs,
1024 struct ext2_super_block *sb);
1025 extern int ext2fs_superblock_csum_verify(ext2_filsys fs,
1026 struct ext2_super_block *sb);
1027 extern errcode_t ext2fs_ext_attr_block_csum_set(ext2_filsys fs,
1028 ext2_ino_t inum, blk64_t block,
1029 struct ext2_ext_attr_header *hdr);
1030 extern int ext2fs_ext_attr_block_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1031 blk64_t block,
1032 struct ext2_ext_attr_header *hdr);
1033 #define EXT2_DIRENT_TAIL(block, blocksize) \
1034 ((struct ext2_dir_entry_tail *)(((char *)(block)) + \
1035 (blocksize) - sizeof(struct ext2_dir_entry_tail)))
1036
1037 extern void ext2fs_initialize_dirent_tail(ext2_filsys fs,
1038 struct ext2_dir_entry_tail *t);
1039 extern int ext2fs_dirent_has_tail(ext2_filsys fs,
1040 struct ext2_dir_entry *dirent);
1041 extern int ext2fs_dirent_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1042 struct ext2_dir_entry *dirent);
1043 extern int ext2fs_dir_block_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1044 struct ext2_dir_entry *dirent);
1045 extern errcode_t ext2fs_dir_block_csum_set(ext2_filsys fs, ext2_ino_t inum,
1046 struct ext2_dir_entry *dirent);
1047 extern errcode_t ext2fs_get_dx_countlimit(ext2_filsys fs,
1048 struct ext2_dir_entry *dirent,
1049 struct ext2_dx_countlimit **cc,
1050 int *offset);
1051 extern errcode_t ext2fs_extent_block_csum_set(ext2_filsys fs,
1052 ext2_ino_t inum,
1053 struct ext3_extent_header *eh);
1054 extern int ext2fs_extent_block_csum_verify(ext2_filsys fs,
1055 ext2_ino_t inum,
1056 struct ext3_extent_header *eh);
1057 extern errcode_t ext2fs_block_bitmap_csum_set(ext2_filsys fs, dgrp_t group,
1058 char *bitmap, int size);
1059 extern int ext2fs_block_bitmap_csum_verify(ext2_filsys fs, dgrp_t group,
1060 char *bitmap, int size);
1061 extern errcode_t ext2fs_inode_bitmap_csum_set(ext2_filsys fs, dgrp_t group,
1062 char *bitmap, int size);
1063 extern int ext2fs_inode_bitmap_csum_verify(ext2_filsys fs, dgrp_t group,
1064 char *bitmap, int size);
1065 extern errcode_t ext2fs_inode_csum_set(ext2_filsys fs, ext2_ino_t inum,
1066 struct ext2_inode_large *inode);
1067 extern int ext2fs_inode_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1068 struct ext2_inode_large *inode);
1069 extern void ext2fs_group_desc_csum_set(ext2_filsys fs, dgrp_t group);
1070 extern int ext2fs_group_desc_csum_verify(ext2_filsys fs, dgrp_t group);
1071 extern errcode_t ext2fs_set_gdt_csum(ext2_filsys fs);
1072 extern __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group);
1073
1074 /* dblist.c */
1075 extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist);
1076 extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino,
1077 blk_t blk, int blockcnt);
1078 extern errcode_t ext2fs_add_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
1079 blk64_t blk, e2_blkcnt_t blockcnt);
1080 extern void ext2fs_dblist_sort(ext2_dblist dblist,
1081 EXT2_QSORT_TYPE (*sortfunc)(const void *,
1082 const void *));
1083 extern void ext2fs_dblist_sort2(ext2_dblist dblist,
1084 EXT2_QSORT_TYPE (*sortfunc)(const void *,
1085 const void *));
1086 extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist,
1087 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info,
1088 void *priv_data),
1089 void *priv_data);
1090 extern errcode_t ext2fs_dblist_iterate2(ext2_dblist dblist,
1091 int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info,
1092 void *priv_data),
1093 void *priv_data);
1094 extern errcode_t ext2fs_dblist_iterate3(ext2_dblist dblist,
1095 int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info,
1096 void *priv_data),
1097 unsigned long long start,
1098 unsigned long long count,
1099 void *priv_data);
1100 extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino,
1101 blk_t blk, int blockcnt);
1102 extern errcode_t ext2fs_set_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
1103 blk64_t blk, e2_blkcnt_t blockcnt);
1104 extern errcode_t ext2fs_copy_dblist(ext2_dblist src,
1105 ext2_dblist *dest);
1106 extern int ext2fs_dblist_count(ext2_dblist dblist);
1107 extern blk64_t ext2fs_dblist_count2(ext2_dblist dblist);
1108 extern errcode_t ext2fs_dblist_get_last(ext2_dblist dblist,
1109 struct ext2_db_entry **entry);
1110 extern errcode_t ext2fs_dblist_get_last2(ext2_dblist dblist,
1111 struct ext2_db_entry2 **entry);
1112 extern errcode_t ext2fs_dblist_drop_last(ext2_dblist dblist);
1113
1114 /* dblist_dir.c */
1115 extern errcode_t
1116 ext2fs_dblist_dir_iterate(ext2_dblist dblist,
1117 int flags,
1118 char *block_buf,
1119 int (*func)(ext2_ino_t dir,
1120 int entry,
1121 struct ext2_dir_entry *dirent,
1122 int offset,
1123 int blocksize,
1124 char *buf,
1125 void *priv_data),
1126 void *priv_data);
1127
1128 #if 0
1129 /* digest_encode.c */
1130 #define EXT2FS_DIGEST_SIZE EXT2FS_SHA256_LENGTH
1131 extern int ext2fs_digest_encode(const char *src, int len, char *dst);
1132 extern int ext2fs_digest_decode(const char *src, int len, char *dst);
1133 #endif
1134
1135 /* dirblock.c */
1136 extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
1137 void *buf);
1138 extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
1139 void *buf, int flags);
1140 extern errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block,
1141 void *buf, int flags);
1142 extern errcode_t ext2fs_read_dir_block4(ext2_filsys fs, blk64_t block,
1143 void *buf, int flags, ext2_ino_t ino);
1144 extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
1145 void *buf);
1146 extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
1147 void *buf, int flags);
1148 extern errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block,
1149 void *buf, int flags);
1150 extern errcode_t ext2fs_write_dir_block4(ext2_filsys fs, blk64_t block,
1151 void *buf, int flags, ext2_ino_t ino);
1152
1153 /* dirhash.c */
1154 extern errcode_t ext2fs_dirhash(int version, const char *name, int len,
1155 const __u32 *seed,
1156 ext2_dirhash_t *ret_hash,
1157 ext2_dirhash_t *ret_minor_hash);
1158
1159
1160 /* dir_iterate.c */
1161 extern errcode_t ext2fs_get_rec_len(ext2_filsys fs,
1162 struct ext2_dir_entry *dirent,
1163 unsigned int *rec_len);
1164 extern errcode_t ext2fs_set_rec_len(ext2_filsys fs,
1165 unsigned int len,
1166 struct ext2_dir_entry *dirent);
1167 extern errcode_t ext2fs_dir_iterate(ext2_filsys fs,
1168 ext2_ino_t dir,
1169 int flags,
1170 char *block_buf,
1171 int (*func)(struct ext2_dir_entry *dirent,
1172 int offset,
1173 int blocksize,
1174 char *buf,
1175 void *priv_data),
1176 void *priv_data);
1177 extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs,
1178 ext2_ino_t dir,
1179 int flags,
1180 char *block_buf,
1181 int (*func)(ext2_ino_t dir,
1182 int entry,
1183 struct ext2_dir_entry *dirent,
1184 int offset,
1185 int blocksize,
1186 char *buf,
1187 void *priv_data),
1188 void *priv_data);
1189
1190 /* dupfs.c */
1191 extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest);
1192
1193 /* expanddir.c */
1194 extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir);
1195
1196 /* ext_attr.c */
1197 extern __u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry,
1198 void *data);
1199 extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf);
1200 extern errcode_t ext2fs_read_ext_attr2(ext2_filsys fs, blk64_t block,
1201 void *buf);
1202 extern errcode_t ext2fs_read_ext_attr3(ext2_filsys fs, blk64_t block,
1203 void *buf, ext2_ino_t inum);
1204 extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block,
1205 void *buf);
1206 extern errcode_t ext2fs_write_ext_attr2(ext2_filsys fs, blk64_t block,
1207 void *buf);
1208 extern errcode_t ext2fs_write_ext_attr3(ext2_filsys fs, blk64_t block,
1209 void *buf, ext2_ino_t inum);
1210 extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,
1211 char *block_buf,
1212 int adjust, __u32 *newcount);
1213 extern errcode_t ext2fs_adjust_ea_refcount2(ext2_filsys fs, blk64_t blk,
1214 char *block_buf,
1215 int adjust, __u32 *newcount);
1216 extern errcode_t ext2fs_adjust_ea_refcount3(ext2_filsys fs, blk64_t blk,
1217 char *block_buf,
1218 int adjust, __u32 *newcount,
1219 ext2_ino_t inum);
1220 errcode_t ext2fs_xattrs_write(struct ext2_xattr_handle *handle);
1221 errcode_t ext2fs_xattrs_read(struct ext2_xattr_handle *handle);
1222 errcode_t ext2fs_xattrs_iterate(struct ext2_xattr_handle *h,
1223 int (*func)(char *name, char *value,
1224 size_t value_len, void *data),
1225 void *data);
1226 errcode_t ext2fs_xattr_get(struct ext2_xattr_handle *h, const char *key,
1227 void **value, size_t *value_len);
1228 errcode_t ext2fs_xattr_set(struct ext2_xattr_handle *handle,
1229 const char *key,
1230 const void *value,
1231 size_t value_len);
1232 errcode_t ext2fs_xattr_remove(struct ext2_xattr_handle *handle,
1233 const char *key);
1234 errcode_t ext2fs_xattrs_open(ext2_filsys fs, ext2_ino_t ino,
1235 struct ext2_xattr_handle **handle);
1236 errcode_t ext2fs_xattrs_close(struct ext2_xattr_handle **handle);
1237 errcode_t ext2fs_free_ext_attr(ext2_filsys fs, ext2_ino_t ino,
1238 struct ext2_inode_large *inode);
1239 errcode_t ext2fs_xattrs_count(struct ext2_xattr_handle *handle, size_t *count);
1240 errcode_t ext2fs_xattr_inode_max_size(ext2_filsys fs, ext2_ino_t ino,
1241 size_t *size);
1242
1243 /* extent.c */
1244 extern errcode_t ext2fs_extent_header_verify(void *ptr, int size);
1245 extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino,
1246 ext2_extent_handle_t *handle);
1247 extern errcode_t ext2fs_extent_open2(ext2_filsys fs, ext2_ino_t ino,
1248 struct ext2_inode *inode,
1249 ext2_extent_handle_t *ret_handle);
1250 extern void ext2fs_extent_free(ext2_extent_handle_t handle);
1251 extern errcode_t ext2fs_extent_get(ext2_extent_handle_t handle,
1252 int flags, struct ext2fs_extent *extent);
1253 extern errcode_t ext2fs_extent_node_split(ext2_extent_handle_t handle);
1254 extern errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle, int flags,
1255 struct ext2fs_extent *extent);
1256 extern errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags,
1257 struct ext2fs_extent *extent);
1258 extern errcode_t ext2fs_extent_set_bmap(ext2_extent_handle_t handle,
1259 blk64_t logical, blk64_t physical,
1260 int flags);
1261 extern errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags);
1262 extern errcode_t ext2fs_extent_get_info(ext2_extent_handle_t handle,
1263 struct ext2_extent_info *info);
1264 extern errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle,
1265 blk64_t blk);
1266 extern errcode_t ext2fs_extent_goto2(ext2_extent_handle_t handle,
1267 int leaf_level, blk64_t blk);
1268 extern errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle);
1269 size_t ext2fs_max_extent_depth(ext2_extent_handle_t handle);
1270
1271 /* fallocate.c */
1272 #define EXT2_FALLOCATE_ZERO_BLOCKS (0x1)
1273 #define EXT2_FALLOCATE_FORCE_INIT (0x2)
1274 #define EXT2_FALLOCATE_FORCE_UNINIT (0x4)
1275 #define EXT2_FALLOCATE_INIT_BEYOND_EOF (0x8)
1276 #define EXT2_FALLOCATE_ALL_FLAGS (0xF)
1277 errcode_t ext2fs_fallocate(ext2_filsys fs, int flags, ext2_ino_t ino,
1278 struct ext2_inode *inode, blk64_t goal,
1279 blk64_t start, blk64_t len);
1280
1281 /* fileio.c */
1282 extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino,
1283 struct ext2_inode *inode,
1284 int flags, ext2_file_t *ret);
1285 extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino,
1286 int flags, ext2_file_t *ret);
1287 extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file);
1288 struct ext2_inode *ext2fs_file_get_inode(ext2_file_t file);
1289 extern ext2_ino_t ext2fs_file_get_inode_num(ext2_file_t file);
1290 extern errcode_t ext2fs_file_close(ext2_file_t file);
1291 extern errcode_t ext2fs_file_flush(ext2_file_t file);
1292 extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf,
1293 unsigned int wanted, unsigned int *got);
1294 extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf,
1295 unsigned int nbytes, unsigned int *written);
1296 extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset,
1297 int whence, __u64 *ret_pos);
1298 extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset,
1299 int whence, ext2_off_t *ret_pos);
1300 errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size);
1301 extern ext2_off_t ext2fs_file_get_size(ext2_file_t file);
1302 extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size);
1303 extern errcode_t ext2fs_file_set_size2(ext2_file_t file, ext2_off64_t size);
1304
1305 /* finddev.c */
1306 extern char *ext2fs_find_block_device(dev_t device);
1307
1308 /* flushb.c */
1309 extern errcode_t ext2fs_sync_device(int fd, int flushb);
1310
1311 /* freefs.c */
1312 extern void ext2fs_free(ext2_filsys fs);
1313 extern void ext2fs_free_dblist(ext2_dblist dblist);
1314 extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb);
1315 extern void ext2fs_u32_list_free(ext2_u32_list bb);
1316
1317 /* gen_bitmap.c */
1318 extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap);
1319 extern errcode_t ext2fs_make_generic_bitmap(errcode_t magic, ext2_filsys fs,
1320 __u32 start, __u32 end,
1321 __u32 real_end,
1322 const char *descr, char *init_map,
1323 ext2fs_generic_bitmap *ret);
1324 extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start,
1325 __u32 end,
1326 __u32 real_end,
1327 const char *descr,
1328 ext2fs_generic_bitmap *ret);
1329 extern errcode_t ext2fs_copy_generic_bitmap(ext2fs_generic_bitmap src,
1330 ext2fs_generic_bitmap *dest);
1331 extern void ext2fs_clear_generic_bitmap(ext2fs_generic_bitmap bitmap);
1332 extern errcode_t ext2fs_fudge_generic_bitmap_end(ext2fs_inode_bitmap bitmap,
1333 errcode_t magic,
1334 errcode_t neq,
1335 ext2_ino_t end,
1336 ext2_ino_t *oend);
1337 extern void ext2fs_set_generic_bitmap_padding(ext2fs_generic_bitmap map);
1338 extern errcode_t ext2fs_resize_generic_bitmap(errcode_t magic,
1339 __u32 new_end,
1340 __u32 new_real_end,
1341 ext2fs_generic_bitmap bmap);
1342 extern errcode_t ext2fs_compare_generic_bitmap(errcode_t magic, errcode_t neq,
1343 ext2fs_generic_bitmap bm1,
1344 ext2fs_generic_bitmap bm2);
1345 extern errcode_t ext2fs_get_generic_bitmap_range(ext2fs_generic_bitmap bmap,
1346 errcode_t magic,
1347 __u32 start, __u32 num,
1348 void *out);
1349 extern errcode_t ext2fs_set_generic_bitmap_range(ext2fs_generic_bitmap bmap,
1350 errcode_t magic,
1351 __u32 start, __u32 num,
1352 void *in);
1353 extern errcode_t ext2fs_find_first_zero_generic_bitmap(ext2fs_generic_bitmap bitmap,
1354 __u32 start, __u32 end,
1355 __u32 *out);
1356 extern errcode_t ext2fs_find_first_set_generic_bitmap(ext2fs_generic_bitmap bitmap,
1357 __u32 start, __u32 end,
1358 __u32 *out);
1359
1360 /* gen_bitmap64.c */
1361 void ext2fs_free_generic_bmap(ext2fs_generic_bitmap bmap);
1362 errcode_t ext2fs_alloc_generic_bmap(ext2_filsys fs, errcode_t magic,
1363 int type, __u64 start, __u64 end,
1364 __u64 real_end,
1365 const char *descr,
1366 ext2fs_generic_bitmap *ret);
1367 errcode_t ext2fs_copy_generic_bmap(ext2fs_generic_bitmap src,
1368 ext2fs_generic_bitmap *dest);
1369 void ext2fs_clear_generic_bmap(ext2fs_generic_bitmap bitmap);
1370 errcode_t ext2fs_fudge_generic_bmap_end(ext2fs_generic_bitmap bitmap,
1371 errcode_t neq,
1372 __u64 end, __u64 *oend);
1373 void ext2fs_set_generic_bmap_padding(ext2fs_generic_bitmap bmap);
1374 errcode_t ext2fs_resize_generic_bmap(ext2fs_generic_bitmap bmap,
1375 __u64 new_end,
1376 __u64 new_real_end);
1377 errcode_t ext2fs_compare_generic_bmap(errcode_t neq,
1378 ext2fs_generic_bitmap bm1,
1379 ext2fs_generic_bitmap bm2);
1380 errcode_t ext2fs_get_generic_bmap_range(ext2fs_generic_bitmap bmap,
1381 __u64 start, unsigned int num,
1382 void *out);
1383 errcode_t ext2fs_set_generic_bmap_range(ext2fs_generic_bitmap bmap,
1384 __u64 start, unsigned int num,
1385 void *in);
1386 errcode_t ext2fs_convert_subcluster_bitmap(ext2_filsys fs,
1387 ext2fs_block_bitmap *bitmap);
1388
1389 /* get_num_dirs.c */
1390 extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs);
1391
1392 /* getsize.c */
1393 extern errcode_t ext2fs_get_device_size(const char *file, int blocksize,
1394 blk_t *retblocks);
1395 extern errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
1396 blk64_t *retblocks);
1397
1398 /* getsectsize.c */
1399 extern int ext2fs_get_dio_alignment(int fd);
1400 errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize);
1401 errcode_t ext2fs_get_device_phys_sectsize(const char *file, int *sectsize);
1402
1403 /* i_block.c */
1404 errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
1405 blk64_t num_blocks);
1406 errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode,
1407 blk64_t num_blocks);
1408 errcode_t ext2fs_iblk_set(ext2_filsys fs, struct ext2_inode *inode, blk64_t b);
1409
1410 /* imager.c */
1411 extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags);
1412 extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags);
1413 extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags);
1414 extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags);
1415 extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags);
1416 extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags);
1417
1418 /* ind_block.c */
1419 errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf);
1420 errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf);
1421
1422 /* initialize.c */
1423 extern errcode_t ext2fs_initialize(const char *name, int flags,
1424 struct ext2_super_block *param,
1425 io_manager manager, ext2_filsys *ret_fs);
1426
1427 /* icount.c */
1428 extern void ext2fs_free_icount(ext2_icount_t icount);
1429 extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir,
1430 int flags, ext2_icount_t *ret);
1431 extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags,
1432 unsigned int size,
1433 ext2_icount_t hint, ext2_icount_t *ret);
1434 extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags,
1435 unsigned int size,
1436 ext2_icount_t *ret);
1437 extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino,
1438 __u16 *ret);
1439 extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino,
1440 __u16 *ret);
1441 extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino,
1442 __u16 *ret);
1443 extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino,
1444 __u16 count);
1445 extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount);
1446 errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *);
1447
1448 /* inline.c */
1449
1450 extern errcode_t ext2fs_get_memalign(unsigned long size,
1451 unsigned long align, void *ptr);
1452
1453 /* inline_data.c */
1454 extern errcode_t ext2fs_inline_data_init(ext2_filsys fs, ext2_ino_t ino);
1455 extern errcode_t ext2fs_inline_data_size(ext2_filsys fs, ext2_ino_t ino,
1456 size_t *size);
1457 extern errcode_t ext2fs_inline_data_get(ext2_filsys fs, ext2_ino_t ino,
1458 struct ext2_inode *inode,
1459 void *buf, size_t *size);
1460 extern errcode_t ext2fs_inline_data_set(ext2_filsys fs, ext2_ino_t ino,
1461 struct ext2_inode *inode,
1462 void *buf, size_t size);
1463
1464 /* inode.c */
1465 extern errcode_t ext2fs_create_inode_cache(ext2_filsys fs,
1466 unsigned int cache_size);
1467 extern void ext2fs_free_inode_cache(struct ext2_inode_cache *icache);
1468 extern errcode_t ext2fs_flush_icache(ext2_filsys fs);
1469 extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan,
1470 ext2_ino_t *ino,
1471 struct ext2_inode *inode,
1472 int bufsize);
1473 #define EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS 8
1474 extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks,
1475 ext2_inode_scan *ret_scan);
1476 extern void ext2fs_close_inode_scan(ext2_inode_scan scan);
1477 extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino,
1478 struct ext2_inode *inode);
1479 extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan,
1480 int group);
1481 extern void ext2fs_set_inode_callback
1482 (ext2_inode_scan scan,
1483 errcode_t (*done_group)(ext2_filsys fs,
1484 ext2_inode_scan scan,
1485 dgrp_t group,
1486 void * priv_data),
1487 void *done_group_data);
1488 extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags,
1489 int clear_flags);
1490 extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
1491 struct ext2_inode * inode,
1492 int bufsize);
1493 extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino,
1494 struct ext2_inode * inode);
1495 extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
1496 struct ext2_inode * inode,
1497 int bufsize);
1498 extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino,
1499 struct ext2_inode * inode);
1500 extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino,
1501 struct ext2_inode * inode);
1502 extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
1503 extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino);
1504
1505 /* inode_io.c */
1506 extern io_manager inode_io_manager;
1507 extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino,
1508 char **name);
1509 extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino,
1510 struct ext2_inode *inode,
1511 char **name);
1512
1513 /* ismounted.c */
1514 extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags);
1515 extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
1516 char *mtpt, int mtlen);
1517
1518 /* punch.c */
1519 /*
1520 * NOTE: This function removes from an inode the blocks "start", "end", and
1521 * every block in between.
1522 */
1523 extern errcode_t ext2fs_punch(ext2_filsys fs, ext2_ino_t ino,
1524 struct ext2_inode *inode,
1525 char *block_buf, blk64_t start,
1526 blk64_t end);
1527
1528 /* namei.c */
1529 extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name,
1530 int namelen, char *buf, ext2_ino_t *inode);
1531 extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1532 const char *name, ext2_ino_t *inode);
1533 errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1534 const char *name, ext2_ino_t *inode);
1535 extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1536 ext2_ino_t inode, ext2_ino_t *res_inode);
1537
1538 /* native.c */
1539 int ext2fs_native_flag(void);
1540
1541 /* newdir.c */
1542 extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
1543 ext2_ino_t parent_ino, char **block);
1544 extern errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs, ext2_ino_t dir_ino,
1545 ext2_ino_t parent_ino, __u32 *iblock);
1546
1547 /* mkdir.c */
1548 extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
1549 const char *name);
1550
1551 /* mkjournal.c */
1552 extern errcode_t ext2fs_zero_blocks(ext2_filsys fs, blk_t blk, int num,
1553 blk_t *ret_blk, int *ret_count);
1554 extern errcode_t ext2fs_zero_blocks2(ext2_filsys fs, blk64_t blk, int num,
1555 blk64_t *ret_blk, int *ret_count);
1556 extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
1557 __u32 num_blocks, int flags,
1558 char **ret_jsb);
1559 extern errcode_t ext2fs_add_journal_device(ext2_filsys fs,
1560 ext2_filsys journal_dev);
1561 extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t num_blocks,
1562 int flags);
1563 extern errcode_t ext2fs_add_journal_inode2(ext2_filsys fs, blk_t num_blocks,
1564 blk64_t goal, int flags);
1565 extern int ext2fs_default_journal_size(__u64 num_blocks);
1566 extern int ext2fs_journal_sb_start(int blocksize);
1567
1568 /* openfs.c */
1569 extern errcode_t ext2fs_open(const char *name, int flags, int superblock,
1570 unsigned int block_size, io_manager manager,
1571 ext2_filsys *ret_fs);
1572 extern errcode_t ext2fs_open2(const char *name, const char *io_options,
1573 int flags, int superblock,
1574 unsigned int block_size, io_manager manager,
1575 ext2_filsys *ret_fs);
1576 /*
1577 * The dgrp_t argument to these two functions is not actually a group number
1578 * but a block number offset within a group table! Convert with the formula
1579 * (group_number / groups_per_block).
1580 */
1581 extern blk64_t ext2fs_descriptor_block_loc2(ext2_filsys fs,
1582 blk64_t group_block, dgrp_t i);
1583 extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block,
1584 dgrp_t i);
1585 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io);
1586 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io);
1587 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io);
1588
1589 /* get_pathname.c */
1590 extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
1591 char **name);
1592
1593 /* link.c */
1594 errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name,
1595 ext2_ino_t ino, int flags);
1596 errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name,
1597 ext2_ino_t ino, int flags);
1598
1599 /* symlink.c */
1600 errcode_t ext2fs_symlink(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t ino,
1601 const char *name, const char *target);
1602
1603 /* mmp.c */
1604 errcode_t ext2fs_mmp_read(ext2_filsys fs, blk64_t mmp_blk, void *buf);
1605 errcode_t ext2fs_mmp_write(ext2_filsys fs, blk64_t mmp_blk, void *buf);
1606 errcode_t ext2fs_mmp_clear(ext2_filsys fs);
1607 errcode_t ext2fs_mmp_init(ext2_filsys fs);
1608 errcode_t ext2fs_mmp_start(ext2_filsys fs);
1609 errcode_t ext2fs_mmp_update(ext2_filsys fs);
1610 errcode_t ext2fs_mmp_update2(ext2_filsys fs, int immediately);
1611 errcode_t ext2fs_mmp_stop(ext2_filsys fs);
1612 unsigned ext2fs_mmp_new_seq(void);
1613
1614 /* read_bb.c */
1615 extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs,
1616 ext2_badblocks_list *bb_list);
1617
1618 /* read_bb_file.c */
1619 extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f,
1620 ext2_badblocks_list *bb_list,
1621 void *priv_data,
1622 void (*invalid)(ext2_filsys fs,
1623 blk_t blk,
1624 char *badstr,
1625 void *priv_data));
1626 extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f,
1627 ext2_badblocks_list *bb_list,
1628 void (*invalid)(ext2_filsys fs,
1629 blk_t blk));
1630
1631 /* res_gdt.c */
1632 extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs);
1633
1634 /*sha256.c */
1635 #define EXT2FS_SHA256_LENGTH 32
1636 #if 0
1637 extern void ext2fs_sha256(const unsigned char *in, unsigned long in_size,
1638 unsigned char out[EXT2FS_SHA256_LENGTH]);
1639 #endif
1640
1641 /* sha512.c */
1642 #define EXT2FS_SHA512_LENGTH 64
1643 extern void ext2fs_sha512(const unsigned char *in, unsigned long in_size,
1644 unsigned char out[EXT2FS_SHA512_LENGTH]);
1645
1646 /* swapfs.c */
1647 extern errcode_t ext2fs_dirent_swab_in2(ext2_filsys fs, char *buf, size_t size,
1648 int flags);
1649 extern errcode_t ext2fs_dirent_swab_in(ext2_filsys fs, char *buf, int flags);
1650 extern errcode_t ext2fs_dirent_swab_out2(ext2_filsys fs, char *buf, size_t size,
1651 int flags);
1652 extern errcode_t ext2fs_dirent_swab_out(ext2_filsys fs, char *buf, int flags);
1653 extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize,
1654 int has_header);
1655 extern void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
1656 struct ext2_ext_attr_header *from_hdr);
1657 extern void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
1658 struct ext2_ext_attr_entry *from_entry);
1659 extern void ext2fs_swap_super(struct ext2_super_block * super);
1660 extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp);
1661 extern void ext2fs_swap_group_desc2(ext2_filsys, struct ext2_group_desc *gdp);
1662 extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
1663 struct ext2_inode_large *f, int hostorder,
1664 int bufsize);
1665 extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t,
1666 struct ext2_inode *f, int hostorder);
1667 extern void ext2fs_swap_mmp(struct mmp_struct *mmp);
1668
1669 /* unix_io.c */
1670 extern int ext2fs_open_file(const char *pathname, int flags, mode_t mode);
1671 extern int ext2fs_stat(const char *path, ext2fs_struct_stat *buf);
1672 extern int ext2fs_fstat(int fd, ext2fs_struct_stat *buf);
1673
1674 /* valid_blk.c */
1675 extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode);
1676 extern int ext2fs_inode_has_valid_blocks2(ext2_filsys fs,
1677 struct ext2_inode *inode);
1678
1679 /* version.c */
1680 extern int ext2fs_parse_version_string(const char *ver_string);
1681 extern int ext2fs_get_library_version(const char **ver_string,
1682 const char **date_string);
1683
1684 /* write_bb_file.c */
1685 extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list,
1686 unsigned int flags,
1687 FILE *f);
1688
1689
1690 /* inline functions */
1691 #ifdef NO_INLINE_FUNCS
1692 extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr);
1693 extern errcode_t ext2fs_get_memzero(unsigned long size, void *ptr);
1694 extern errcode_t ext2fs_get_array(unsigned long count,
1695 unsigned long size, void *ptr);
1696 extern errcode_t ext2fs_get_arrayzero(unsigned long count,
1697 unsigned long size, void *ptr);
1698 extern errcode_t ext2fs_free_mem(void *ptr);
1699 extern errcode_t ext2fs_resize_mem(unsigned long old_size,
1700 unsigned long size, void *ptr);
1701 extern void ext2fs_mark_super_dirty(ext2_filsys fs);
1702 extern void ext2fs_mark_changed(ext2_filsys fs);
1703 extern int ext2fs_test_changed(ext2_filsys fs);
1704 extern void ext2fs_mark_valid(ext2_filsys fs);
1705 extern void ext2fs_unmark_valid(ext2_filsys fs);
1706 extern int ext2fs_test_valid(ext2_filsys fs);
1707 extern void ext2fs_mark_ib_dirty(ext2_filsys fs);
1708 extern void ext2fs_mark_bb_dirty(ext2_filsys fs);
1709 extern int ext2fs_test_ib_dirty(ext2_filsys fs);
1710 extern int ext2fs_test_bb_dirty(ext2_filsys fs);
1711 extern dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk);
1712 extern dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino);
1713 extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group);
1714 extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group);
1715 extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1716 struct ext2_inode *inode);
1717 extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b);
1718 extern __u64 ext2fs_div64_ceil(__u64 a, __u64 b);
1719 extern int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry);
1720 extern void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len);
1721 extern int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry);
1722 extern void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type);
1723 extern struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode);
1724 extern const struct ext2_inode *ext2fs_const_inode(const struct ext2_inode_large * large_inode);
1725
1726 #endif
1727
1728 /*
1729 * The actual inlined functions definitions themselves...
1730 *
1731 * If NO_INLINE_FUNCS is defined, then we won't try to do inline
1732 * functions at all!
1733 */
1734 #if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
1735 #ifdef INCLUDE_INLINE_FUNCS
1736 #define _INLINE_ extern
1737 #else
1738 #if (__STDC_VERSION__ >= 199901L)
1739 #define _INLINE_ inline
1740 #else
1741 #ifdef __GNUC__
1742 #define _INLINE_ extern __inline__
1743 #else /* For Watcom C */
1744 #define _INLINE_ extern inline
1745 #endif /* __GNUC__ */
1746 #endif /* __STDC_VERSION__ >= 199901L */
1747 #endif
1748
1749 #ifndef EXT2_CUSTOM_MEMORY_ROUTINES
1750 #include <string.h>
1751 /*
1752 * Allocate memory. The 'ptr' arg must point to a pointer.
1753 */
ext2fs_get_mem(unsigned long size,void * ptr)1754 _INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
1755 {
1756 void *pp;
1757
1758 pp = malloc(size);
1759 if (!pp)
1760 return EXT2_ET_NO_MEMORY;
1761 memcpy(ptr, &pp, sizeof (pp));
1762 return 0;
1763 }
1764
ext2fs_get_memzero(unsigned long size,void * ptr)1765 _INLINE_ errcode_t ext2fs_get_memzero(unsigned long size, void *ptr)
1766 {
1767 void *pp;
1768
1769 pp = malloc(size);
1770 if (!pp)
1771 return EXT2_ET_NO_MEMORY;
1772 memset(pp, 0, size);
1773 memcpy(ptr, &pp, sizeof(pp));
1774 return 0;
1775 }
1776
ext2fs_get_array(unsigned long count,unsigned long size,void * ptr)1777 _INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr)
1778 {
1779 if (count && (~0UL)/count < size)
1780 return EXT2_ET_NO_MEMORY;
1781 return ext2fs_get_mem(count*size, ptr);
1782 }
1783
ext2fs_get_arrayzero(unsigned long count,unsigned long size,void * ptr)1784 _INLINE_ errcode_t ext2fs_get_arrayzero(unsigned long count,
1785 unsigned long size, void *ptr)
1786 {
1787 void *pp;
1788
1789 if (count && (~0UL)/count < size)
1790 return EXT2_ET_NO_MEMORY;
1791 pp = calloc(count, size);
1792 if (!pp)
1793 return EXT2_ET_NO_MEMORY;
1794 memcpy(ptr, &pp, sizeof(pp));
1795 return 0;
1796 }
1797
1798 /*
1799 * Free memory. The 'ptr' arg must point to a pointer.
1800 */
ext2fs_free_mem(void * ptr)1801 _INLINE_ errcode_t ext2fs_free_mem(void *ptr)
1802 {
1803 void *p;
1804
1805 memcpy(&p, ptr, sizeof(p));
1806 free(p);
1807 p = 0;
1808 memcpy(ptr, &p, sizeof(p));
1809 return 0;
1810 }
1811
1812 /*
1813 * Resize memory. The 'ptr' arg must point to a pointer.
1814 */
ext2fs_resize_mem(unsigned long EXT2FS_ATTR ((unused))old_size,unsigned long size,void * ptr)1815 _INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
1816 unsigned long size, void *ptr)
1817 {
1818 void *p;
1819
1820 /* Use "memcpy" for pointer assignments here to avoid problems
1821 * with C99 strict type aliasing rules. */
1822 memcpy(&p, ptr, sizeof(p));
1823 p = realloc(p, size);
1824 if (!p)
1825 return EXT2_ET_NO_MEMORY;
1826 memcpy(ptr, &p, sizeof(p));
1827 return 0;
1828 }
1829 #endif /* Custom memory routines */
1830
1831 /*
1832 * Mark a filesystem superblock as dirty
1833 */
ext2fs_mark_super_dirty(ext2_filsys fs)1834 _INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs)
1835 {
1836 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED;
1837 }
1838
1839 /*
1840 * Mark a filesystem as changed
1841 */
ext2fs_mark_changed(ext2_filsys fs)1842 _INLINE_ void ext2fs_mark_changed(ext2_filsys fs)
1843 {
1844 fs->flags |= EXT2_FLAG_CHANGED;
1845 }
1846
1847 /*
1848 * Check to see if a filesystem has changed
1849 */
ext2fs_test_changed(ext2_filsys fs)1850 _INLINE_ int ext2fs_test_changed(ext2_filsys fs)
1851 {
1852 return (fs->flags & EXT2_FLAG_CHANGED);
1853 }
1854
1855 /*
1856 * Mark a filesystem as valid
1857 */
ext2fs_mark_valid(ext2_filsys fs)1858 _INLINE_ void ext2fs_mark_valid(ext2_filsys fs)
1859 {
1860 fs->flags |= EXT2_FLAG_VALID;
1861 }
1862
1863 /*
1864 * Mark a filesystem as NOT valid
1865 */
ext2fs_unmark_valid(ext2_filsys fs)1866 _INLINE_ void ext2fs_unmark_valid(ext2_filsys fs)
1867 {
1868 fs->flags &= ~EXT2_FLAG_VALID;
1869 }
1870
1871 /*
1872 * Check to see if a filesystem is valid
1873 */
ext2fs_test_valid(ext2_filsys fs)1874 _INLINE_ int ext2fs_test_valid(ext2_filsys fs)
1875 {
1876 return (fs->flags & EXT2_FLAG_VALID);
1877 }
1878
1879 /*
1880 * Mark the inode bitmap as dirty
1881 */
ext2fs_mark_ib_dirty(ext2_filsys fs)1882 _INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs)
1883 {
1884 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED;
1885 }
1886
1887 /*
1888 * Mark the block bitmap as dirty
1889 */
ext2fs_mark_bb_dirty(ext2_filsys fs)1890 _INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs)
1891 {
1892 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED;
1893 }
1894
1895 /*
1896 * Check to see if a filesystem's inode bitmap is dirty
1897 */
ext2fs_test_ib_dirty(ext2_filsys fs)1898 _INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs)
1899 {
1900 return (fs->flags & EXT2_FLAG_IB_DIRTY);
1901 }
1902
1903 /*
1904 * Check to see if a filesystem's block bitmap is dirty
1905 */
ext2fs_test_bb_dirty(ext2_filsys fs)1906 _INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs)
1907 {
1908 return (fs->flags & EXT2_FLAG_BB_DIRTY);
1909 }
1910
1911 /*
1912 * Return the group # of a block
1913 */
ext2fs_group_of_blk(ext2_filsys fs,blk_t blk)1914 _INLINE_ dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
1915 {
1916 return ext2fs_group_of_blk2(fs, blk);
1917 }
1918 /*
1919 * Return the group # of an inode number
1920 */
ext2fs_group_of_ino(ext2_filsys fs,ext2_ino_t ino)1921 _INLINE_ dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
1922 {
1923 return (ino - 1) / fs->super->s_inodes_per_group;
1924 }
1925
1926 /*
1927 * Return the first block (inclusive) in a group
1928 */
ext2fs_group_first_block(ext2_filsys fs,dgrp_t group)1929 _INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group)
1930 {
1931 return (blk_t) ext2fs_group_first_block2(fs, group);
1932 }
1933
1934 /*
1935 * Return the last block (inclusive) in a group
1936 */
ext2fs_group_last_block(ext2_filsys fs,dgrp_t group)1937 _INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group)
1938 {
1939 return (blk_t) ext2fs_group_last_block2(fs, group);
1940 }
1941
ext2fs_inode_data_blocks(ext2_filsys fs,struct ext2_inode * inode)1942 _INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1943 struct ext2_inode *inode)
1944 {
1945 return (blk_t) ext2fs_inode_data_blocks2(fs, inode);
1946 }
1947
1948 /*
1949 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
1950 */
ext2fs_div_ceil(unsigned int a,unsigned int b)1951 _INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b)
1952 {
1953 if (!a)
1954 return 0;
1955 return ((a - 1) / b) + 1;
1956 }
1957
ext2fs_div64_ceil(__u64 a,__u64 b)1958 _INLINE_ __u64 ext2fs_div64_ceil(__u64 a, __u64 b)
1959 {
1960 if (!a)
1961 return 0;
1962 return ((a - 1) / b) + 1;
1963 }
1964
ext2fs_dirent_name_len(const struct ext2_dir_entry * entry)1965 _INLINE_ int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry)
1966 {
1967 return entry->name_len & 0xff;
1968 }
1969
ext2fs_dirent_set_name_len(struct ext2_dir_entry * entry,int len)1970 _INLINE_ void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len)
1971 {
1972 entry->name_len = (entry->name_len & 0xff00) | (len & 0xff);
1973 }
1974
ext2fs_dirent_file_type(const struct ext2_dir_entry * entry)1975 _INLINE_ int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry)
1976 {
1977 return entry->name_len >> 8;
1978 }
1979
ext2fs_dirent_set_file_type(struct ext2_dir_entry * entry,int type)1980 _INLINE_ void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type)
1981 {
1982 entry->name_len = (entry->name_len & 0xff) | (type << 8);
1983 }
1984
ext2fs_inode(struct ext2_inode_large * large_inode)1985 _INLINE_ struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode)
1986 {
1987 /* It is always safe to convert large inode to a small inode */
1988 return (struct ext2_inode *) large_inode;
1989 }
1990
1991 _INLINE_ const struct ext2_inode *
ext2fs_const_inode(const struct ext2_inode_large * large_inode)1992 ext2fs_const_inode(const struct ext2_inode_large * large_inode)
1993 {
1994 /* It is always safe to convert large inode to a small inode */
1995 return (const struct ext2_inode *) large_inode;
1996 }
1997
1998 #undef _INLINE_
1999 #endif
2000
2001 #ifdef __cplusplus
2002 }
2003 #endif
2004
2005 #endif /* _EXT2FS_EXT2FS_H */
2006