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[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 #include "hashmap.h"
98
99 /*
100 * Portability help for Microsoft Visual C++
101 */
102 #ifdef _MSC_VER
103 #define EXT2_QSORT_TYPE int __cdecl
104 #else
105 #define EXT2_QSORT_TYPE int
106 #endif
107
108 typedef struct struct_ext2_filsys *ext2_filsys;
109
110 #define EXT2FS_MARK_ERROR 0
111 #define EXT2FS_UNMARK_ERROR 1
112 #define EXT2FS_TEST_ERROR 2
113
114 struct ext2fs_struct_generic_bitmap_base {
115 errcode_t magic;
116 ext2_filsys fs;
117 };
118
119 typedef struct ext2fs_struct_generic_bitmap_base *ext2fs_generic_bitmap;
120 typedef struct ext2fs_struct_generic_bitmap_base *ext2fs_inode_bitmap;
121 typedef struct ext2fs_struct_generic_bitmap_base *ext2fs_block_bitmap;
122
123 #define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s)
124
125
126 /*
127 * Badblocks list definitions
128 */
129
130 typedef struct ext2_struct_u32_list *ext2_badblocks_list;
131 typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate;
132
133 typedef struct ext2_struct_u32_list *ext2_u32_list;
134 typedef struct ext2_struct_u32_iterate *ext2_u32_iterate;
135
136 /* old */
137 typedef struct ext2_struct_u32_list *badblocks_list;
138 typedef struct ext2_struct_u32_iterate *badblocks_iterate;
139
140 #define BADBLOCKS_FLAG_DIRTY 1
141
142 /*
143 * ext2_dblist structure and abstractions (see dblist.c)
144 */
145 struct ext2_db_entry2 {
146 ext2_ino_t ino;
147 blk64_t blk;
148 e2_blkcnt_t blockcnt;
149 };
150
151 /* Ye Olde 32-bit version */
152 struct ext2_db_entry {
153 ext2_ino_t ino;
154 blk_t blk;
155 int blockcnt;
156 };
157
158 typedef struct ext2_struct_dblist *ext2_dblist;
159
160 #define DBLIST_ABORT 1
161
162 /*
163 * ext2_fileio definitions
164 */
165
166 #define EXT2_FILE_WRITE 0x0001
167 #define EXT2_FILE_CREATE 0x0002
168
169 #define EXT2_FILE_MASK 0x00FF
170
171 #define EXT2_FILE_BUF_DIRTY 0x4000
172 #define EXT2_FILE_BUF_VALID 0x2000
173
174 typedef struct ext2_file *ext2_file_t;
175
176 #define EXT2_SEEK_SET 0
177 #define EXT2_SEEK_CUR 1
178 #define EXT2_SEEK_END 2
179
180 /*
181 * Flags for the ext2_filsys structure and for ext2fs_open()
182 */
183 #define EXT2_FLAG_RW 0x01
184 #define EXT2_FLAG_CHANGED 0x02
185 #define EXT2_FLAG_DIRTY 0x04
186 #define EXT2_FLAG_VALID 0x08
187 #define EXT2_FLAG_IB_DIRTY 0x10
188 #define EXT2_FLAG_BB_DIRTY 0x20
189 #define EXT2_FLAG_SWAP_BYTES 0x40
190 #define EXT2_FLAG_SWAP_BYTES_READ 0x80
191 #define EXT2_FLAG_SWAP_BYTES_WRITE 0x100
192 #define EXT2_FLAG_MASTER_SB_ONLY 0x200
193 #define EXT2_FLAG_FORCE 0x400
194 #define EXT2_FLAG_SUPER_ONLY 0x800
195 #define EXT2_FLAG_JOURNAL_DEV_OK 0x1000
196 #define EXT2_FLAG_IMAGE_FILE 0x2000
197 #define EXT2_FLAG_EXCLUSIVE 0x4000
198 #define EXT2_FLAG_SOFTSUPP_FEATURES 0x8000
199 #define EXT2_FLAG_NOFREE_ON_ERROR 0x10000
200 #define EXT2_FLAG_64BITS 0x20000
201 #define EXT2_FLAG_PRINT_PROGRESS 0x40000
202 #define EXT2_FLAG_DIRECT_IO 0x80000
203 #define EXT2_FLAG_SKIP_MMP 0x100000
204 #define EXT2_FLAG_IGNORE_CSUM_ERRORS 0x200000
205 #define EXT2_FLAG_SHARE_DUP 0x400000
206 #define EXT2_FLAG_IGNORE_SB_ERRORS 0x800000
207
208 /*
209 * Special flag in the ext2 inode i_flag field that means that this is
210 * a new inode. (So that ext2_write_inode() can clear extra fields.)
211 */
212 #define EXT2_NEW_INODE_FL 0x80000000
213
214 /*
215 * Flags for mkjournal
216 */
217 #define EXT2_MKJOURNAL_V1_SUPER 0x0000001 /* create V1 superblock (deprecated) */
218 #define EXT2_MKJOURNAL_LAZYINIT 0x0000002 /* don't zero journal inode before use*/
219 #define EXT2_MKJOURNAL_NO_MNT_CHECK 0x0000004 /* don't check mount status */
220
221 struct blk_alloc_ctx;
222 struct opaque_ext2_group_desc;
223
224 struct struct_ext2_filsys {
225 errcode_t magic;
226 io_channel io;
227 int flags;
228 char * device_name;
229 struct ext2_super_block * super;
230 unsigned int blocksize;
231 int fragsize;
232 dgrp_t group_desc_count;
233 unsigned long desc_blocks;
234 struct opaque_ext2_group_desc * group_desc;
235 unsigned int inode_blocks_per_group;
236 ext2fs_inode_bitmap inode_map;
237 ext2fs_block_bitmap block_map;
238 /* XXX FIXME-64: not 64-bit safe, but not used? */
239 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
240 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino);
241 errcode_t (*write_bitmaps)(ext2_filsys fs);
242 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino,
243 struct ext2_inode *inode);
244 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino,
245 struct ext2_inode *inode);
246 ext2_badblocks_list badblocks;
247 ext2_dblist dblist;
248 __u32 stride; /* for mke2fs */
249 struct ext2_super_block * orig_super;
250 struct ext2_image_hdr * image_header;
251 __u32 umask;
252 time_t now;
253 int cluster_ratio_bits;
254 __u16 default_bitmap_type;
255 __u16 pad;
256 /*
257 * Reserved for future expansion
258 */
259 __u32 reserved[5];
260
261 /*
262 * Reserved for the use of the calling application.
263 */
264 void * priv_data;
265
266 /*
267 * Inode cache
268 */
269 struct ext2_inode_cache *icache;
270 io_channel image_io;
271
272 /*
273 * More callback functions
274 */
275 errcode_t (*get_alloc_block)(ext2_filsys fs, blk64_t goal,
276 blk64_t *ret);
277 errcode_t (*get_alloc_block2)(ext2_filsys fs, blk64_t goal,
278 blk64_t *ret, struct blk_alloc_ctx *ctx);
279 void (*block_alloc_stats)(ext2_filsys fs, blk64_t blk, int inuse);
280
281 /*
282 * Buffers for Multiple mount protection(MMP) block.
283 */
284 void *mmp_buf;
285 void *mmp_cmp;
286 int mmp_fd;
287
288 /*
289 * Time at which e2fsck last updated the MMP block.
290 */
291 long mmp_last_written;
292
293 /* progress operation functions */
294 struct ext2fs_progress_ops *progress_ops;
295
296 /* Precomputed FS UUID checksum for seeding other checksums */
297 __u32 csum_seed;
298
299 io_channel journal_io;
300 char *journal_name;
301
302 /* New block range allocation hooks */
303 errcode_t (*new_range)(ext2_filsys fs, int flags, blk64_t goal,
304 blk64_t len, blk64_t *pblk, blk64_t *plen);
305 void (*block_alloc_stats_range)(ext2_filsys fs, blk64_t blk, blk_t num,
306 int inuse);
307
308 /* hashmap for SHA of data blocks */
309 struct ext2fs_hashmap* block_sha_map;
310 };
311
312 #if EXT2_FLAT_INCLUDES
313 #include "e2_bitops.h"
314 #else
315 #include <ext2fs/bitops.h>
316 #endif
317
318 /*
319 * 64-bit bitmap backend types
320 */
321 #define EXT2FS_BMAP64_BITARRAY 1
322 #define EXT2FS_BMAP64_RBTREE 2
323 #define EXT2FS_BMAP64_AUTODIR 3
324
325 /*
326 * Return flags for the block iterator functions
327 */
328 #define BLOCK_CHANGED 1
329 #define BLOCK_ABORT 2
330 #define BLOCK_ERROR 4
331 #define BLOCK_INLINE_DATA_CHANGED 8
332
333 /*
334 * Block interate flags
335 *
336 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator
337 * function should be called on blocks where the block number is zero.
338 * This is used by ext2fs_expand_dir() to be able to add a new block
339 * to an inode. It can also be used for programs that want to be able
340 * to deal with files that contain "holes".
341 *
342 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for
343 * the indirect, doubly indirect, etc. blocks should be called after
344 * all of the blocks contained in the indirect blocks are processed.
345 * This is useful if you are going to be deallocating blocks from an
346 * inode.
347 *
348 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be
349 * called for data blocks only.
350 *
351 * BLOCK_FLAG_READ_ONLY is a promise by the caller that it will not
352 * modify returned block number.
353 *
354 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs
355 * ext2fs_block_iterate2 that large files won't be accepted.
356 */
357 #define BLOCK_FLAG_APPEND 1
358 #define BLOCK_FLAG_HOLE 1
359 #define BLOCK_FLAG_DEPTH_TRAVERSE 2
360 #define BLOCK_FLAG_DATA_ONLY 4
361 #define BLOCK_FLAG_READ_ONLY 8
362
363 #define BLOCK_FLAG_NO_LARGE 0x1000
364
365 /*
366 * Magic "block count" return values for the block iterator function.
367 */
368 #define BLOCK_COUNT_IND (-1)
369 #define BLOCK_COUNT_DIND (-2)
370 #define BLOCK_COUNT_TIND (-3)
371 #define BLOCK_COUNT_TRANSLATOR (-4)
372
373 #define BLOCK_ALLOC_UNKNOWN 0
374 #define BLOCK_ALLOC_DATA 1
375 #define BLOCK_ALLOC_METADATA 2
376
377 struct blk_alloc_ctx {
378 ext2_ino_t ino;
379 struct ext2_inode *inode;
380 blk64_t lblk;
381 int flags;
382 };
383
384 #if 0
385 /*
386 * Flags for ext2fs_move_blocks
387 */
388 #define EXT2_BMOVE_GET_DBLIST 0x0001
389 #define EXT2_BMOVE_DEBUG 0x0002
390 #endif
391
392 /*
393 * Generic (non-filesystem layout specific) extents structure
394 */
395
396 #define EXT2_EXTENT_FLAGS_LEAF 0x0001
397 #define EXT2_EXTENT_FLAGS_UNINIT 0x0002
398 #define EXT2_EXTENT_FLAGS_SECOND_VISIT 0x0004
399
400 struct ext2fs_extent {
401 blk64_t e_pblk; /* first physical block */
402 blk64_t e_lblk; /* first logical block extent covers */
403 __u32 e_len; /* number of blocks covered by extent */
404 __u32 e_flags; /* extent flags */
405 };
406
407 typedef struct ext2_extent_handle *ext2_extent_handle_t;
408 typedef struct ext2_extent_path *ext2_extent_path_t;
409
410 /*
411 * Flags used by ext2fs_extent_get()
412 */
413 #define EXT2_EXTENT_CURRENT 0x0000
414 #define EXT2_EXTENT_MOVE_MASK 0x000F
415 #define EXT2_EXTENT_ROOT 0x0001
416 #define EXT2_EXTENT_LAST_LEAF 0x0002
417 #define EXT2_EXTENT_FIRST_SIB 0x0003
418 #define EXT2_EXTENT_LAST_SIB 0x0004
419 #define EXT2_EXTENT_NEXT_SIB 0x0005
420 #define EXT2_EXTENT_PREV_SIB 0x0006
421 #define EXT2_EXTENT_NEXT_LEAF 0x0007
422 #define EXT2_EXTENT_PREV_LEAF 0x0008
423 #define EXT2_EXTENT_NEXT 0x0009
424 #define EXT2_EXTENT_PREV 0x000A
425 #define EXT2_EXTENT_UP 0x000B
426 #define EXT2_EXTENT_DOWN 0x000C
427 #define EXT2_EXTENT_DOWN_AND_LAST 0x000D
428
429 /*
430 * Flags used by ext2fs_extent_insert()
431 */
432 #define EXT2_EXTENT_INSERT_AFTER 0x0001 /* insert after handle loc'n */
433 #define EXT2_EXTENT_INSERT_NOSPLIT 0x0002 /* insert may not cause split */
434
435 /*
436 * Flags used by ext2fs_extent_delete()
437 */
438 #define EXT2_EXTENT_DELETE_KEEP_EMPTY 0x001 /* keep node if last extent gone */
439
440 /*
441 * Flags used by ext2fs_extent_set_bmap()
442 */
443 #define EXT2_EXTENT_SET_BMAP_UNINIT 0x0001
444
445 /*
446 * Data structure returned by ext2fs_extent_get_info()
447 */
448 struct ext2_extent_info {
449 int curr_entry;
450 int curr_level;
451 int num_entries;
452 int max_entries;
453 int max_depth;
454 int bytes_avail;
455 blk64_t max_lblk;
456 blk64_t max_pblk;
457 __u32 max_len;
458 __u32 max_uninit_len;
459 };
460
461 /*
462 * Flags for directory block reading and writing functions
463 */
464 #define EXT2_DIRBLOCK_V2_STRUCT 0x0001
465
466 /*
467 * Return flags for the directory iterator functions
468 */
469 #define DIRENT_CHANGED 1
470 #define DIRENT_ABORT 2
471 #define DIRENT_ERROR 3
472
473 /*
474 * Directory iterator flags
475 */
476
477 #define DIRENT_FLAG_INCLUDE_EMPTY 1
478 #define DIRENT_FLAG_INCLUDE_REMOVED 2
479 #define DIRENT_FLAG_INCLUDE_CSUM 4
480 #define DIRENT_FLAG_INCLUDE_INLINE_DATA 8
481
482 #define DIRENT_DOT_FILE 1
483 #define DIRENT_DOT_DOT_FILE 2
484 #define DIRENT_OTHER_FILE 3
485 #define DIRENT_DELETED_FILE 4
486 #define DIRENT_CHECKSUM 5
487
488 /*
489 * Inode scan definitions
490 */
491 typedef struct ext2_struct_inode_scan *ext2_inode_scan;
492
493 /*
494 * ext2fs_scan flags
495 */
496 #define EXT2_SF_CHK_BADBLOCKS 0x0001
497 #define EXT2_SF_BAD_INODE_BLK 0x0002
498 #define EXT2_SF_BAD_EXTRA_BYTES 0x0004
499 #define EXT2_SF_SKIP_MISSING_ITABLE 0x0008
500 #define EXT2_SF_DO_LAZY 0x0010
501 #define EXT2_SF_WARN_GARBAGE_INODES 0x0020
502
503 /*
504 * ext2fs_check_if_mounted flags
505 */
506 #define EXT2_MF_MOUNTED 1
507 #define EXT2_MF_ISROOT 2
508 #define EXT2_MF_READONLY 4
509 #define EXT2_MF_SWAP 8
510 #define EXT2_MF_BUSY 16
511
512 /*
513 * Ext2/linux mode flags. We define them here so that we don't need
514 * to depend on the OS's sys/stat.h, since we may be compiling on a
515 * non-Linux system.
516 */
517 #define LINUX_S_IFMT 00170000
518 #define LINUX_S_IFSOCK 0140000
519 #define LINUX_S_IFLNK 0120000
520 #define LINUX_S_IFREG 0100000
521 #define LINUX_S_IFBLK 0060000
522 #define LINUX_S_IFDIR 0040000
523 #define LINUX_S_IFCHR 0020000
524 #define LINUX_S_IFIFO 0010000
525 #define LINUX_S_ISUID 0004000
526 #define LINUX_S_ISGID 0002000
527 #define LINUX_S_ISVTX 0001000
528
529 #define LINUX_S_IRWXU 00700
530 #define LINUX_S_IRUSR 00400
531 #define LINUX_S_IWUSR 00200
532 #define LINUX_S_IXUSR 00100
533
534 #define LINUX_S_IRWXG 00070
535 #define LINUX_S_IRGRP 00040
536 #define LINUX_S_IWGRP 00020
537 #define LINUX_S_IXGRP 00010
538
539 #define LINUX_S_IRWXO 00007
540 #define LINUX_S_IROTH 00004
541 #define LINUX_S_IWOTH 00002
542 #define LINUX_S_IXOTH 00001
543
544 #define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK)
545 #define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG)
546 #define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR)
547 #define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR)
548 #define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK)
549 #define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO)
550 #define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK)
551
552 /*
553 * ext2 size of an inode
554 */
555 #define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32))
556
557 /*
558 * ext2_icount_t abstraction
559 */
560 #define EXT2_ICOUNT_OPT_INCREMENT 0x01
561 #define EXT2_ICOUNT_OPT_FULLMAP 0x02
562
563 typedef struct ext2_icount *ext2_icount_t;
564
565 /*
566 * Flags for ext2fs_bmap
567 */
568 #define BMAP_ALLOC 0x0001
569 #define BMAP_SET 0x0002
570 #define BMAP_UNINIT 0x0004
571 #define BMAP_ZERO 0x0008
572
573 /*
574 * Returned flags from ext2fs_bmap
575 */
576 #define BMAP_RET_UNINIT 0x0001
577
578 /*
579 * Flags for imager.c functions
580 */
581 #define IMAGER_FLAG_INODEMAP 1
582 #define IMAGER_FLAG_SPARSEWRITE 2
583
584 /*
585 * For checking structure magic numbers...
586 */
587
588 #define EXT2_CHECK_MAGIC(struct, code) \
589 if ((struct)->magic != (code)) return (code)
590
591 /*
592 * Features supported by this version of the library
593 */
594 #define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\
595 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\
596 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\
597 EXT2_FEATURE_COMPAT_RESIZE_INODE|\
598 EXT2_FEATURE_COMPAT_DIR_INDEX|\
599 EXT2_FEATURE_COMPAT_EXT_ATTR|\
600 EXT4_FEATURE_COMPAT_SPARSE_SUPER2)
601
602 #ifdef CONFIG_MMP
603 #define EXT4_LIB_INCOMPAT_MMP EXT4_FEATURE_INCOMPAT_MMP
604 #else
605 #define EXT4_LIB_INCOMPAT_MMP (0)
606 #endif
607
608 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\
609 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\
610 EXT2_FEATURE_INCOMPAT_META_BG|\
611 EXT3_FEATURE_INCOMPAT_RECOVER|\
612 EXT3_FEATURE_INCOMPAT_EXTENTS|\
613 EXT4_FEATURE_INCOMPAT_FLEX_BG|\
614 EXT4_FEATURE_INCOMPAT_EA_INODE|\
615 EXT4_LIB_INCOMPAT_MMP|\
616 EXT4_FEATURE_INCOMPAT_64BIT|\
617 EXT4_FEATURE_INCOMPAT_INLINE_DATA|\
618 EXT4_FEATURE_INCOMPAT_ENCRYPT|\
619 EXT4_FEATURE_INCOMPAT_FNAME_ENCODING|\
620 EXT4_FEATURE_INCOMPAT_CSUM_SEED|\
621 EXT4_FEATURE_INCOMPAT_LARGEDIR)
622
623 #define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
624 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
625 EXT2_FEATURE_RO_COMPAT_LARGE_FILE|\
626 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\
627 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|\
628 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\
629 EXT4_FEATURE_RO_COMPAT_BIGALLOC|\
630 EXT4_FEATURE_RO_COMPAT_QUOTA|\
631 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\
632 EXT4_FEATURE_RO_COMPAT_READONLY |\
633 EXT4_FEATURE_RO_COMPAT_PROJECT |\
634 EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS |\
635 EXT4_FEATURE_RO_COMPAT_VERITY)
636
637 /*
638 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed
639 * to ext2fs_openfs()
640 */
641 #define EXT2_LIB_SOFTSUPP_INCOMPAT (0)
642 #define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_REPLICA)
643
644
645 /* Translate a block number to a cluster number */
646 #define EXT2FS_CLUSTER_RATIO(fs) (1 << (fs)->cluster_ratio_bits)
647 #define EXT2FS_CLUSTER_MASK(fs) (EXT2FS_CLUSTER_RATIO(fs) - 1)
648 #define EXT2FS_B2C(fs, blk) ((blk) >> (fs)->cluster_ratio_bits)
649 /* Translate a cluster number to a block number */
650 #define EXT2FS_C2B(fs, cluster) ((cluster) << (fs)->cluster_ratio_bits)
651 /* Translate # of blks to # of clusters */
652 #define EXT2FS_NUM_B2C(fs, blks) (((blks) + EXT2FS_CLUSTER_MASK(fs)) >> \
653 (fs)->cluster_ratio_bits)
654
655 #if defined(HAVE_FSTAT64) && !defined(__OSX_AVAILABLE_BUT_DEPRECATED)
656 typedef struct stat64 ext2fs_struct_stat;
657 #else
658 typedef struct stat ext2fs_struct_stat;
659 #endif
660
661 /*
662 * For ext2fs_close2() and ext2fs_flush2(), this flag allows you to
663 * avoid the fsync call.
664 */
665 #define EXT2_FLAG_FLUSH_NO_SYNC 1
666
667 /*
668 * Modify and iterate extended attributes
669 */
670 struct ext2_xattr_handle;
671 #define XATTR_ABORT 1
672 #define XATTR_CHANGED 2
673
674 /*
675 * function prototypes
676 */
677 static inline int ext2fs_has_group_desc_csum(ext2_filsys fs)
678 {
679 return ext2fs_has_feature_metadata_csum(fs->super) ||
680 ext2fs_has_feature_gdt_csum(fs->super);
681 }
682
683 /* The LARGE_FILE feature should be set if we have stored files 2GB+ in size */
684 static inline int ext2fs_needs_large_file_feature(unsigned long long file_size)
685 {
686 return file_size >= 0x80000000ULL;
687 }
688
689 /* alloc.c */
690 extern void ext2fs_clear_block_uninit(ext2_filsys fs, dgrp_t group);
691 extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode,
692 ext2fs_inode_bitmap map, ext2_ino_t *ret);
693 extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
694 ext2fs_block_bitmap map, blk_t *ret);
695 extern errcode_t ext2fs_new_block2(ext2_filsys fs, blk64_t goal,
696 ext2fs_block_bitmap map, blk64_t *ret);
697 extern errcode_t ext2fs_new_block3(ext2_filsys fs, blk64_t goal,
698 ext2fs_block_bitmap map, blk64_t *ret,
699 struct blk_alloc_ctx *ctx);
700 extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start,
701 blk_t finish, int num,
702 ext2fs_block_bitmap map,
703 blk_t *ret);
704 extern errcode_t ext2fs_get_free_blocks2(ext2_filsys fs, blk64_t start,
705 blk64_t finish, int num,
706 ext2fs_block_bitmap map,
707 blk64_t *ret);
708 extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
709 char *block_buf, blk_t *ret);
710 extern errcode_t ext2fs_alloc_block2(ext2_filsys fs, blk64_t goal,
711 char *block_buf, blk64_t *ret);
712 extern errcode_t ext2fs_alloc_block3(ext2_filsys fs, blk64_t goal,
713 char *block_buf, blk64_t *ret,
714 struct blk_alloc_ctx *ctx);
715
716 extern void ext2fs_set_alloc_block_callback(ext2_filsys fs,
717 errcode_t (*func)(ext2_filsys fs,
718 blk64_t goal,
719 blk64_t *ret),
720 errcode_t (**old)(ext2_filsys fs,
721 blk64_t goal,
722 blk64_t *ret));
723 blk64_t ext2fs_find_inode_goal(ext2_filsys fs, ext2_ino_t ino,
724 struct ext2_inode *inode, blk64_t lblk);
725 extern void ext2fs_set_new_range_callback(ext2_filsys fs,
726 errcode_t (*func)(ext2_filsys fs, int flags, blk64_t goal,
727 blk64_t len, blk64_t *pblk, blk64_t *plen),
728 errcode_t (**old)(ext2_filsys fs, int flags, blk64_t goal,
729 blk64_t len, blk64_t *pblk, blk64_t *plen));
730 extern void ext2fs_set_block_alloc_stats_range_callback(ext2_filsys fs,
731 void (*func)(ext2_filsys fs, blk64_t blk,
732 blk_t num, int inuse),
733 void (**old)(ext2_filsys fs, blk64_t blk,
734 blk_t num, int inuse));
735 #define EXT2_NEWRANGE_FIXED_GOAL (0x1)
736 #define EXT2_NEWRANGE_MIN_LENGTH (0x2)
737 #define EXT2_NEWRANGE_ALL_FLAGS (0x3)
738 errcode_t ext2fs_new_range(ext2_filsys fs, int flags, blk64_t goal,
739 blk64_t len, ext2fs_block_bitmap map, blk64_t *pblk,
740 blk64_t *plen);
741 #define EXT2_ALLOCRANGE_FIXED_GOAL (0x1)
742 #define EXT2_ALLOCRANGE_ZERO_BLOCKS (0x2)
743 #define EXT2_ALLOCRANGE_ALL_FLAGS (0x3)
744 errcode_t ext2fs_alloc_range(ext2_filsys fs, int flags, blk64_t goal,
745 blk_t len, blk64_t *ret);
746
747 /* alloc_sb.c */
748 extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
749 dgrp_t group,
750 ext2fs_block_bitmap bmap);
751 extern void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
752 void (*func)(ext2_filsys fs,
753 blk64_t blk,
754 int inuse),
755 void (**old)(ext2_filsys fs,
756 blk64_t blk,
757 int inuse));
758
759 /* alloc_stats.c */
760 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse);
761 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
762 int inuse, int isdir);
763 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse);
764 void ext2fs_block_alloc_stats2(ext2_filsys fs, blk64_t blk, int inuse);
765 void ext2fs_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
766 blk_t num, int inuse);
767
768 /* alloc_tables.c */
769 extern errcode_t ext2fs_allocate_tables(ext2_filsys fs);
770 extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
771 ext2fs_block_bitmap bmap);
772
773 /* badblocks.c */
774 extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size);
775 extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk);
776 extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk);
777 extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk);
778 extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb,
779 ext2_u32_iterate *ret);
780 extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk);
781 extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter);
782 extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest);
783 extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2);
784
785 extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret,
786 int size);
787 extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb,
788 blk_t blk);
789 extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb,
790 blk_t blk);
791 extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk);
792 extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk);
793 extern errcode_t
794 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
795 ext2_badblocks_iterate *ret);
796 extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter,
797 blk_t *blk);
798 extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter);
799 extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
800 ext2_badblocks_list *dest);
801 extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1,
802 ext2_badblocks_list bb2);
803 extern int ext2fs_u32_list_count(ext2_u32_list bb);
804
805 /* bb_compat */
806 extern errcode_t badblocks_list_create(badblocks_list *ret, int size);
807 extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk);
808 extern int badblocks_list_test(badblocks_list bb, blk_t blk);
809 extern errcode_t badblocks_list_iterate_begin(badblocks_list bb,
810 badblocks_iterate *ret);
811 extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk);
812 extern void badblocks_list_iterate_end(badblocks_iterate iter);
813 extern void badblocks_list_free(badblocks_list bb);
814
815 /* bb_inode.c */
816 extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs,
817 ext2_badblocks_list bb_list);
818
819 /* bitmaps.c */
820 extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap);
821 extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap);
822 extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
823 ext2fs_generic_bitmap *dest);
824 extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs);
825 extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs);
826 extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs);
827 extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs);
828 extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
829 const char *descr,
830 ext2fs_block_bitmap *ret);
831 extern errcode_t ext2fs_allocate_subcluster_bitmap(ext2_filsys fs,
832 const char *descr,
833 ext2fs_block_bitmap *ret);
834 extern int ext2fs_get_bitmap_granularity(ext2fs_block_bitmap bitmap);
835 extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
836 const char *descr,
837 ext2fs_inode_bitmap *ret);
838 extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
839 ext2_ino_t end, ext2_ino_t *oend);
840 extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
841 blk_t end, blk_t *oend);
842 extern errcode_t ext2fs_fudge_block_bitmap_end2(ext2fs_block_bitmap bitmap,
843 blk64_t end, blk64_t *oend);
844 extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap);
845 extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap);
846 extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs);
847 extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs);
848 extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
849 ext2fs_inode_bitmap bmap);
850 extern errcode_t ext2fs_resize_inode_bitmap2(__u64 new_end,
851 __u64 new_real_end,
852 ext2fs_inode_bitmap bmap);
853 extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
854 ext2fs_block_bitmap bmap);
855 extern errcode_t ext2fs_resize_block_bitmap2(__u64 new_end,
856 __u64 new_real_end,
857 ext2fs_block_bitmap bmap);
858 extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
859 ext2fs_block_bitmap bm2);
860 extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
861 ext2fs_inode_bitmap bm2);
862 extern errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap,
863 ext2_ino_t start, unsigned int num,
864 void *in);
865 extern errcode_t ext2fs_set_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
866 __u64 start, size_t num,
867 void *in);
868 extern errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap,
869 ext2_ino_t start, unsigned int num,
870 void *out);
871 extern errcode_t ext2fs_get_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
872 __u64 start, size_t num,
873 void *out);
874 extern errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap,
875 blk_t start, unsigned int num,
876 void *in);
877 extern errcode_t ext2fs_set_block_bitmap_range2(ext2fs_block_bitmap bmap,
878 blk64_t start, size_t num,
879 void *in);
880 extern errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap,
881 blk_t start, unsigned int num,
882 void *out);
883 extern errcode_t ext2fs_get_block_bitmap_range2(ext2fs_block_bitmap bmap,
884 blk64_t start, size_t num,
885 void *out);
886
887 /* blknum.c */
888 extern __u32 ext2fs_inode_bitmap_checksum(ext2_filsys fs, dgrp_t group);
889 extern __u32 ext2fs_block_bitmap_checksum(ext2_filsys fs, dgrp_t group);
890 extern dgrp_t ext2fs_group_of_blk2(ext2_filsys fs, blk64_t);
891 extern blk64_t ext2fs_group_first_block2(ext2_filsys fs, dgrp_t group);
892 extern blk64_t ext2fs_group_last_block2(ext2_filsys fs, dgrp_t group);
893 extern int ext2fs_group_blocks_count(ext2_filsys fs, dgrp_t group);
894 extern blk64_t ext2fs_inode_data_blocks2(ext2_filsys fs,
895 struct ext2_inode *inode);
896 extern blk64_t ext2fs_inode_i_blocks(ext2_filsys fs,
897 struct ext2_inode *inode);
898 extern blk64_t ext2fs_blocks_count(struct ext2_super_block *super);
899 extern void ext2fs_blocks_count_set(struct ext2_super_block *super,
900 blk64_t blk);
901 extern void ext2fs_blocks_count_add(struct ext2_super_block *super,
902 blk64_t blk);
903 extern blk64_t ext2fs_r_blocks_count(struct ext2_super_block *super);
904 extern void ext2fs_r_blocks_count_set(struct ext2_super_block *super,
905 blk64_t blk);
906 extern void ext2fs_r_blocks_count_add(struct ext2_super_block *super,
907 blk64_t blk);
908 extern blk64_t ext2fs_free_blocks_count(struct ext2_super_block *super);
909 extern void ext2fs_free_blocks_count_set(struct ext2_super_block *super,
910 blk64_t blk);
911 extern void ext2fs_free_blocks_count_add(struct ext2_super_block *super,
912 blk64_t blk);
913 /* Block group descriptor accessor functions */
914 extern struct ext2_group_desc *ext2fs_group_desc(ext2_filsys fs,
915 struct opaque_ext2_group_desc *gdp,
916 dgrp_t group);
917 extern blk64_t ext2fs_block_bitmap_csum(ext2_filsys fs, dgrp_t group);
918 extern blk64_t ext2fs_block_bitmap_loc(ext2_filsys fs, dgrp_t group);
919 extern void ext2fs_block_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
920 blk64_t blk);
921 extern __u32 ext2fs_inode_bitmap_csum(ext2_filsys fs, dgrp_t group);
922 extern blk64_t ext2fs_inode_bitmap_loc(ext2_filsys fs, dgrp_t group);
923 extern void ext2fs_inode_bitmap_loc_set(ext2_filsys fs, dgrp_t group,
924 blk64_t blk);
925 extern blk64_t ext2fs_inode_table_loc(ext2_filsys fs, dgrp_t group);
926 extern void ext2fs_inode_table_loc_set(ext2_filsys fs, dgrp_t group,
927 blk64_t blk);
928 extern __u32 ext2fs_bg_free_blocks_count(ext2_filsys fs, dgrp_t group);
929 extern void ext2fs_bg_free_blocks_count_set(ext2_filsys fs, dgrp_t group,
930 __u32 n);
931 extern __u32 ext2fs_bg_free_inodes_count(ext2_filsys fs, dgrp_t group);
932 extern void ext2fs_bg_free_inodes_count_set(ext2_filsys fs, dgrp_t group,
933 __u32 n);
934 extern __u32 ext2fs_bg_used_dirs_count(ext2_filsys fs, dgrp_t group);
935 extern void ext2fs_bg_used_dirs_count_set(ext2_filsys fs, dgrp_t group,
936 __u32 n);
937 extern __u32 ext2fs_bg_itable_unused(ext2_filsys fs, dgrp_t group);
938 extern void ext2fs_bg_itable_unused_set(ext2_filsys fs, dgrp_t group,
939 __u32 n);
940 extern __u16 ext2fs_bg_flags(ext2_filsys fs, dgrp_t group);
941 extern void ext2fs_bg_flags_zap(ext2_filsys fs, dgrp_t group);
942 extern int ext2fs_bg_flags_test(ext2_filsys fs, dgrp_t group, __u16 bg_flag);
943 extern void ext2fs_bg_flags_set(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
944 extern void ext2fs_bg_flags_clear(ext2_filsys fs, dgrp_t group, __u16 bg_flags);
945 extern __u16 ext2fs_bg_checksum(ext2_filsys fs, dgrp_t group);
946 extern void ext2fs_bg_checksum_set(ext2_filsys fs, dgrp_t group, __u16 checksum);
947 extern blk64_t ext2fs_file_acl_block(ext2_filsys fs,
948 const struct ext2_inode *inode);
949 extern void ext2fs_file_acl_block_set(ext2_filsys fs,
950 struct ext2_inode *inode, blk64_t blk);
951 extern errcode_t ext2fs_inode_size_set(ext2_filsys fs, struct ext2_inode *inode,
952 ext2_off64_t size);
953
954 /* block.c */
955 extern errcode_t ext2fs_block_iterate(ext2_filsys fs,
956 ext2_ino_t ino,
957 int flags,
958 char *block_buf,
959 int (*func)(ext2_filsys fs,
960 blk_t *blocknr,
961 int blockcnt,
962 void *priv_data),
963 void *priv_data);
964 errcode_t ext2fs_block_iterate2(ext2_filsys fs,
965 ext2_ino_t ino,
966 int flags,
967 char *block_buf,
968 int (*func)(ext2_filsys fs,
969 blk_t *blocknr,
970 e2_blkcnt_t blockcnt,
971 blk_t ref_blk,
972 int ref_offset,
973 void *priv_data),
974 void *priv_data);
975 errcode_t ext2fs_block_iterate3(ext2_filsys fs,
976 ext2_ino_t ino,
977 int flags,
978 char *block_buf,
979 int (*func)(ext2_filsys fs,
980 blk64_t *blocknr,
981 e2_blkcnt_t blockcnt,
982 blk64_t ref_blk,
983 int ref_offset,
984 void *priv_data),
985 void *priv_data);
986
987 /* bmap.c */
988 extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino,
989 struct ext2_inode *inode,
990 char *block_buf, int bmap_flags,
991 blk_t block, blk_t *phys_blk);
992 extern errcode_t ext2fs_bmap2(ext2_filsys fs, ext2_ino_t ino,
993 struct ext2_inode *inode,
994 char *block_buf, int bmap_flags, blk64_t block,
995 int *ret_flags, blk64_t *phys_blk);
996 errcode_t ext2fs_map_cluster_block(ext2_filsys fs, ext2_ino_t ino,
997 struct ext2_inode *inode, blk64_t lblk,
998 blk64_t *pblk);
999
1000 #if 0
1001 /* bmove.c */
1002 extern errcode_t ext2fs_move_blocks(ext2_filsys fs,
1003 ext2fs_block_bitmap reserve,
1004 ext2fs_block_bitmap alloc_map,
1005 int flags);
1006 #endif
1007
1008 /* check_desc.c */
1009 extern errcode_t ext2fs_check_desc(ext2_filsys fs);
1010
1011 /* closefs.c */
1012 extern errcode_t ext2fs_close(ext2_filsys fs);
1013 extern errcode_t ext2fs_close2(ext2_filsys fs, int flags);
1014 extern errcode_t ext2fs_close_free(ext2_filsys *fs);
1015 extern errcode_t ext2fs_flush(ext2_filsys fs);
1016 extern errcode_t ext2fs_flush2(ext2_filsys fs, int flags);
1017 extern int ext2fs_bg_has_super(ext2_filsys fs, dgrp_t group_block);
1018 extern errcode_t ext2fs_super_and_bgd_loc2(ext2_filsys fs,
1019 dgrp_t group,
1020 blk64_t *ret_super_blk,
1021 blk64_t *ret_old_desc_blk,
1022 blk64_t *ret_new_desc_blk,
1023 blk_t *ret_used_blks);
1024 extern int ext2fs_super_and_bgd_loc(ext2_filsys fs,
1025 dgrp_t group,
1026 blk_t *ret_super_blk,
1027 blk_t *ret_old_desc_blk,
1028 blk_t *ret_new_desc_blk,
1029 int *ret_meta_bg);
1030 extern void ext2fs_update_dynamic_rev(ext2_filsys fs);
1031
1032 /* crc32c.c */
1033 extern __u32 ext2fs_crc32_be(__u32 crc, unsigned char const *p, size_t len);
1034 extern __u32 ext2fs_crc32c_le(__u32 crc, unsigned char const *p, size_t len);
1035
1036 /* csum.c */
1037 extern void ext2fs_init_csum_seed(ext2_filsys fs);
1038 extern errcode_t ext2fs_mmp_csum_set(ext2_filsys fs, struct mmp_struct *mmp);
1039 extern int ext2fs_mmp_csum_verify(ext2_filsys, struct mmp_struct *mmp);
1040 extern int ext2fs_verify_csum_type(ext2_filsys fs, struct ext2_super_block *sb);
1041 extern errcode_t ext2fs_superblock_csum_set(ext2_filsys fs,
1042 struct ext2_super_block *sb);
1043 extern int ext2fs_superblock_csum_verify(ext2_filsys fs,
1044 struct ext2_super_block *sb);
1045 extern errcode_t ext2fs_ext_attr_block_csum_set(ext2_filsys fs,
1046 ext2_ino_t inum, blk64_t block,
1047 struct ext2_ext_attr_header *hdr);
1048 extern int ext2fs_ext_attr_block_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1049 blk64_t block,
1050 struct ext2_ext_attr_header *hdr);
1051 #define EXT2_DIRENT_TAIL(block, blocksize) \
1052 ((struct ext2_dir_entry_tail *)(((char *)(block)) + \
1053 (blocksize) - sizeof(struct ext2_dir_entry_tail)))
1054
1055 extern void ext2fs_initialize_dirent_tail(ext2_filsys fs,
1056 struct ext2_dir_entry_tail *t);
1057 extern int ext2fs_dirent_has_tail(ext2_filsys fs,
1058 struct ext2_dir_entry *dirent);
1059 extern int ext2fs_dirent_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1060 struct ext2_dir_entry *dirent);
1061 extern int ext2fs_dir_block_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1062 struct ext2_dir_entry *dirent);
1063 extern errcode_t ext2fs_dir_block_csum_set(ext2_filsys fs, ext2_ino_t inum,
1064 struct ext2_dir_entry *dirent);
1065 extern errcode_t ext2fs_get_dx_countlimit(ext2_filsys fs,
1066 struct ext2_dir_entry *dirent,
1067 struct ext2_dx_countlimit **cc,
1068 int *offset);
1069 extern errcode_t ext2fs_extent_block_csum_set(ext2_filsys fs,
1070 ext2_ino_t inum,
1071 struct ext3_extent_header *eh);
1072 extern int ext2fs_extent_block_csum_verify(ext2_filsys fs,
1073 ext2_ino_t inum,
1074 struct ext3_extent_header *eh);
1075 extern errcode_t ext2fs_block_bitmap_csum_set(ext2_filsys fs, dgrp_t group,
1076 char *bitmap, int size);
1077 extern int ext2fs_block_bitmap_csum_verify(ext2_filsys fs, dgrp_t group,
1078 char *bitmap, int size);
1079 extern errcode_t ext2fs_inode_bitmap_csum_set(ext2_filsys fs, dgrp_t group,
1080 char *bitmap, int size);
1081 extern int ext2fs_inode_bitmap_csum_verify(ext2_filsys fs, dgrp_t group,
1082 char *bitmap, int size);
1083 extern errcode_t ext2fs_inode_csum_set(ext2_filsys fs, ext2_ino_t inum,
1084 struct ext2_inode_large *inode);
1085 extern int ext2fs_inode_csum_verify(ext2_filsys fs, ext2_ino_t inum,
1086 struct ext2_inode_large *inode);
1087 extern void ext2fs_group_desc_csum_set(ext2_filsys fs, dgrp_t group);
1088 extern int ext2fs_group_desc_csum_verify(ext2_filsys fs, dgrp_t group);
1089 extern errcode_t ext2fs_set_gdt_csum(ext2_filsys fs);
1090 extern __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group);
1091
1092 /* dblist.c */
1093 extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist);
1094 extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino,
1095 blk_t blk, int blockcnt);
1096 extern errcode_t ext2fs_add_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
1097 blk64_t blk, e2_blkcnt_t blockcnt);
1098 extern void ext2fs_dblist_sort(ext2_dblist dblist,
1099 EXT2_QSORT_TYPE (*sortfunc)(const void *,
1100 const void *));
1101 extern void ext2fs_dblist_sort2(ext2_dblist dblist,
1102 EXT2_QSORT_TYPE (*sortfunc)(const void *,
1103 const void *));
1104 extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist,
1105 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info,
1106 void *priv_data),
1107 void *priv_data);
1108 extern errcode_t ext2fs_dblist_iterate2(ext2_dblist dblist,
1109 int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info,
1110 void *priv_data),
1111 void *priv_data);
1112 extern errcode_t ext2fs_dblist_iterate3(ext2_dblist dblist,
1113 int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info,
1114 void *priv_data),
1115 unsigned long long start,
1116 unsigned long long count,
1117 void *priv_data);
1118 extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino,
1119 blk_t blk, int blockcnt);
1120 extern errcode_t ext2fs_set_dir_block2(ext2_dblist dblist, ext2_ino_t ino,
1121 blk64_t blk, e2_blkcnt_t blockcnt);
1122 extern errcode_t ext2fs_copy_dblist(ext2_dblist src,
1123 ext2_dblist *dest);
1124 extern int ext2fs_dblist_count(ext2_dblist dblist);
1125 extern blk64_t ext2fs_dblist_count2(ext2_dblist dblist);
1126 extern errcode_t ext2fs_dblist_get_last(ext2_dblist dblist,
1127 struct ext2_db_entry **entry);
1128 extern errcode_t ext2fs_dblist_get_last2(ext2_dblist dblist,
1129 struct ext2_db_entry2 **entry);
1130 extern errcode_t ext2fs_dblist_drop_last(ext2_dblist dblist);
1131
1132 /* dblist_dir.c */
1133 extern errcode_t
1134 ext2fs_dblist_dir_iterate(ext2_dblist dblist,
1135 int flags,
1136 char *block_buf,
1137 int (*func)(ext2_ino_t dir,
1138 int entry,
1139 struct ext2_dir_entry *dirent,
1140 int offset,
1141 int blocksize,
1142 char *buf,
1143 void *priv_data),
1144 void *priv_data);
1145
1146 #if 0
1147 /* digest_encode.c */
1148 #define EXT2FS_DIGEST_SIZE EXT2FS_SHA256_LENGTH
1149 extern int ext2fs_digest_encode(const char *src, int len, char *dst);
1150 extern int ext2fs_digest_decode(const char *src, int len, char *dst);
1151 #endif
1152
1153 /* dirblock.c */
1154 extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
1155 void *buf);
1156 extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
1157 void *buf, int flags);
1158 extern errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block,
1159 void *buf, int flags);
1160 extern errcode_t ext2fs_read_dir_block4(ext2_filsys fs, blk64_t block,
1161 void *buf, int flags, ext2_ino_t ino);
1162 extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
1163 void *buf);
1164 extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
1165 void *buf, int flags);
1166 extern errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block,
1167 void *buf, int flags);
1168 extern errcode_t ext2fs_write_dir_block4(ext2_filsys fs, blk64_t block,
1169 void *buf, int flags, ext2_ino_t ino);
1170
1171 /* dirhash.c */
1172 extern errcode_t ext2fs_dirhash(int version, const char *name, int len,
1173 const __u32 *seed,
1174 ext2_dirhash_t *ret_hash,
1175 ext2_dirhash_t *ret_minor_hash);
1176
1177
1178 /* dir_iterate.c */
1179 extern errcode_t ext2fs_get_rec_len(ext2_filsys fs,
1180 struct ext2_dir_entry *dirent,
1181 unsigned int *rec_len);
1182 extern errcode_t ext2fs_set_rec_len(ext2_filsys fs,
1183 unsigned int len,
1184 struct ext2_dir_entry *dirent);
1185 extern errcode_t ext2fs_dir_iterate(ext2_filsys fs,
1186 ext2_ino_t dir,
1187 int flags,
1188 char *block_buf,
1189 int (*func)(struct ext2_dir_entry *dirent,
1190 int offset,
1191 int blocksize,
1192 char *buf,
1193 void *priv_data),
1194 void *priv_data);
1195 extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs,
1196 ext2_ino_t dir,
1197 int flags,
1198 char *block_buf,
1199 int (*func)(ext2_ino_t dir,
1200 int entry,
1201 struct ext2_dir_entry *dirent,
1202 int offset,
1203 int blocksize,
1204 char *buf,
1205 void *priv_data),
1206 void *priv_data);
1207
1208 /* dupfs.c */
1209 extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest);
1210
1211 /* expanddir.c */
1212 extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir);
1213
1214 /* ext_attr.c */
1215 extern __u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry,
1216 void *data);
1217 extern errcode_t ext2fs_ext_attr_hash_entry2(ext2_filsys fs,
1218 struct ext2_ext_attr_entry *entry,
1219 void *data, __u32 *hash);
1220 extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf);
1221 extern errcode_t ext2fs_read_ext_attr2(ext2_filsys fs, blk64_t block,
1222 void *buf);
1223 extern errcode_t ext2fs_read_ext_attr3(ext2_filsys fs, blk64_t block,
1224 void *buf, ext2_ino_t inum);
1225 extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block,
1226 void *buf);
1227 extern errcode_t ext2fs_write_ext_attr2(ext2_filsys fs, blk64_t block,
1228 void *buf);
1229 extern errcode_t ext2fs_write_ext_attr3(ext2_filsys fs, blk64_t block,
1230 void *buf, ext2_ino_t inum);
1231 extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,
1232 char *block_buf,
1233 int adjust, __u32 *newcount);
1234 extern errcode_t ext2fs_adjust_ea_refcount2(ext2_filsys fs, blk64_t blk,
1235 char *block_buf,
1236 int adjust, __u32 *newcount);
1237 extern errcode_t ext2fs_adjust_ea_refcount3(ext2_filsys fs, blk64_t blk,
1238 char *block_buf,
1239 int adjust, __u32 *newcount,
1240 ext2_ino_t inum);
1241 errcode_t ext2fs_xattrs_write(struct ext2_xattr_handle *handle);
1242 errcode_t ext2fs_xattrs_read(struct ext2_xattr_handle *handle);
1243 errcode_t ext2fs_xattrs_iterate(struct ext2_xattr_handle *h,
1244 int (*func)(char *name, char *value,
1245 size_t value_len, void *data),
1246 void *data);
1247 errcode_t ext2fs_xattr_get(struct ext2_xattr_handle *h, const char *key,
1248 void **value, size_t *value_len);
1249 errcode_t ext2fs_xattr_set(struct ext2_xattr_handle *handle,
1250 const char *key,
1251 const void *value,
1252 size_t value_len);
1253 errcode_t ext2fs_xattr_remove(struct ext2_xattr_handle *handle,
1254 const char *key);
1255 errcode_t ext2fs_xattrs_open(ext2_filsys fs, ext2_ino_t ino,
1256 struct ext2_xattr_handle **handle);
1257 errcode_t ext2fs_xattrs_close(struct ext2_xattr_handle **handle);
1258 errcode_t ext2fs_free_ext_attr(ext2_filsys fs, ext2_ino_t ino,
1259 struct ext2_inode_large *inode);
1260 errcode_t ext2fs_xattrs_count(struct ext2_xattr_handle *handle, size_t *count);
1261 errcode_t ext2fs_xattr_inode_max_size(ext2_filsys fs, ext2_ino_t ino,
1262 size_t *size);
1263 #define XATTR_HANDLE_FLAG_RAW 0x0001
1264 errcode_t ext2fs_xattrs_flags(struct ext2_xattr_handle *handle,
1265 unsigned int *new_flags, unsigned int *old_flags);
1266 extern void ext2fs_ext_attr_block_rehash(struct ext2_ext_attr_header *header,
1267 struct ext2_ext_attr_entry *end);
1268 extern __u32 ext2fs_get_ea_inode_hash(struct ext2_inode *inode);
1269 extern void ext2fs_set_ea_inode_hash(struct ext2_inode *inode, __u32 hash);
1270 extern __u64 ext2fs_get_ea_inode_ref(struct ext2_inode *inode);
1271 extern void ext2fs_set_ea_inode_ref(struct ext2_inode *inode, __u64 ref_count);
1272
1273 /* extent.c */
1274 extern errcode_t ext2fs_extent_header_verify(void *ptr, int size);
1275 extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino,
1276 ext2_extent_handle_t *handle);
1277 extern errcode_t ext2fs_extent_open2(ext2_filsys fs, ext2_ino_t ino,
1278 struct ext2_inode *inode,
1279 ext2_extent_handle_t *ret_handle);
1280 extern void ext2fs_extent_free(ext2_extent_handle_t handle);
1281 extern errcode_t ext2fs_extent_get(ext2_extent_handle_t handle,
1282 int flags, struct ext2fs_extent *extent);
1283 extern errcode_t ext2fs_extent_node_split(ext2_extent_handle_t handle);
1284 extern errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle, int flags,
1285 struct ext2fs_extent *extent);
1286 extern errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags,
1287 struct ext2fs_extent *extent);
1288 extern errcode_t ext2fs_extent_set_bmap(ext2_extent_handle_t handle,
1289 blk64_t logical, blk64_t physical,
1290 int flags);
1291 extern errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags);
1292 extern errcode_t ext2fs_extent_get_info(ext2_extent_handle_t handle,
1293 struct ext2_extent_info *info);
1294 extern errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle,
1295 blk64_t blk);
1296 extern errcode_t ext2fs_extent_goto2(ext2_extent_handle_t handle,
1297 int leaf_level, blk64_t blk);
1298 extern errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle);
1299 extern size_t ext2fs_max_extent_depth(ext2_extent_handle_t handle);
1300 extern errcode_t ext2fs_fix_extents_checksums(ext2_filsys fs, ext2_ino_t ino,
1301 struct ext2_inode *inode);
1302
1303 /* fallocate.c */
1304 #define EXT2_FALLOCATE_ZERO_BLOCKS (0x1)
1305 #define EXT2_FALLOCATE_FORCE_INIT (0x2)
1306 #define EXT2_FALLOCATE_FORCE_UNINIT (0x4)
1307 #define EXT2_FALLOCATE_INIT_BEYOND_EOF (0x8)
1308 #define EXT2_FALLOCATE_ALL_FLAGS (0xF)
1309 errcode_t ext2fs_fallocate(ext2_filsys fs, int flags, ext2_ino_t ino,
1310 struct ext2_inode *inode, blk64_t goal,
1311 blk64_t start, blk64_t len);
1312
1313 /* fileio.c */
1314 extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino,
1315 struct ext2_inode *inode,
1316 int flags, ext2_file_t *ret);
1317 extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino,
1318 int flags, ext2_file_t *ret);
1319 extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file);
1320 struct ext2_inode *ext2fs_file_get_inode(ext2_file_t file);
1321 extern ext2_ino_t ext2fs_file_get_inode_num(ext2_file_t file);
1322 extern errcode_t ext2fs_file_close(ext2_file_t file);
1323 extern errcode_t ext2fs_file_flush(ext2_file_t file);
1324 extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf,
1325 unsigned int wanted, unsigned int *got);
1326 extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf,
1327 unsigned int nbytes, unsigned int *written);
1328 extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset,
1329 int whence, __u64 *ret_pos);
1330 extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset,
1331 int whence, ext2_off_t *ret_pos);
1332 errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size);
1333 extern ext2_off_t ext2fs_file_get_size(ext2_file_t file);
1334 extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size);
1335 extern errcode_t ext2fs_file_set_size2(ext2_file_t file, ext2_off64_t size);
1336
1337 /* finddev.c */
1338 extern char *ext2fs_find_block_device(dev_t device);
1339
1340 /* flushb.c */
1341 extern errcode_t ext2fs_sync_device(int fd, int flushb);
1342
1343 /* freefs.c */
1344 extern void ext2fs_free(ext2_filsys fs);
1345 extern void ext2fs_free_dblist(ext2_dblist dblist);
1346 extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb);
1347 extern void ext2fs_u32_list_free(ext2_u32_list bb);
1348
1349 /* gen_bitmap.c */
1350 extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap);
1351 extern errcode_t ext2fs_make_generic_bitmap(errcode_t magic, ext2_filsys fs,
1352 __u32 start, __u32 end,
1353 __u32 real_end,
1354 const char *descr, char *init_map,
1355 ext2fs_generic_bitmap *ret);
1356 extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start,
1357 __u32 end,
1358 __u32 real_end,
1359 const char *descr,
1360 ext2fs_generic_bitmap *ret);
1361 extern errcode_t ext2fs_copy_generic_bitmap(ext2fs_generic_bitmap src,
1362 ext2fs_generic_bitmap *dest);
1363 extern void ext2fs_clear_generic_bitmap(ext2fs_generic_bitmap bitmap);
1364 extern errcode_t ext2fs_fudge_generic_bitmap_end(ext2fs_inode_bitmap bitmap,
1365 errcode_t magic,
1366 errcode_t neq,
1367 ext2_ino_t end,
1368 ext2_ino_t *oend);
1369 extern void ext2fs_set_generic_bitmap_padding(ext2fs_generic_bitmap map);
1370 extern errcode_t ext2fs_resize_generic_bitmap(errcode_t magic,
1371 __u32 new_end,
1372 __u32 new_real_end,
1373 ext2fs_generic_bitmap bmap);
1374 extern errcode_t ext2fs_compare_generic_bitmap(errcode_t magic, errcode_t neq,
1375 ext2fs_generic_bitmap bm1,
1376 ext2fs_generic_bitmap bm2);
1377 extern errcode_t ext2fs_get_generic_bitmap_range(ext2fs_generic_bitmap bmap,
1378 errcode_t magic,
1379 __u32 start, __u32 num,
1380 void *out);
1381 extern errcode_t ext2fs_set_generic_bitmap_range(ext2fs_generic_bitmap bmap,
1382 errcode_t magic,
1383 __u32 start, __u32 num,
1384 void *in);
1385 extern errcode_t ext2fs_find_first_zero_generic_bitmap(ext2fs_generic_bitmap bitmap,
1386 __u32 start, __u32 end,
1387 __u32 *out);
1388 extern errcode_t ext2fs_find_first_set_generic_bitmap(ext2fs_generic_bitmap bitmap,
1389 __u32 start, __u32 end,
1390 __u32 *out);
1391
1392 /* gen_bitmap64.c */
1393 void ext2fs_free_generic_bmap(ext2fs_generic_bitmap bmap);
1394 errcode_t ext2fs_alloc_generic_bmap(ext2_filsys fs, errcode_t magic,
1395 int type, __u64 start, __u64 end,
1396 __u64 real_end,
1397 const char *descr,
1398 ext2fs_generic_bitmap *ret);
1399 errcode_t ext2fs_copy_generic_bmap(ext2fs_generic_bitmap src,
1400 ext2fs_generic_bitmap *dest);
1401 void ext2fs_clear_generic_bmap(ext2fs_generic_bitmap bitmap);
1402 errcode_t ext2fs_fudge_generic_bmap_end(ext2fs_generic_bitmap bitmap,
1403 errcode_t neq,
1404 __u64 end, __u64 *oend);
1405 void ext2fs_set_generic_bmap_padding(ext2fs_generic_bitmap bmap);
1406 errcode_t ext2fs_resize_generic_bmap(ext2fs_generic_bitmap bmap,
1407 __u64 new_end,
1408 __u64 new_real_end);
1409 errcode_t ext2fs_compare_generic_bmap(errcode_t neq,
1410 ext2fs_generic_bitmap bm1,
1411 ext2fs_generic_bitmap bm2);
1412 errcode_t ext2fs_get_generic_bmap_range(ext2fs_generic_bitmap bmap,
1413 __u64 start, unsigned int num,
1414 void *out);
1415 errcode_t ext2fs_set_generic_bmap_range(ext2fs_generic_bitmap bmap,
1416 __u64 start, unsigned int num,
1417 void *in);
1418 errcode_t ext2fs_convert_subcluster_bitmap(ext2_filsys fs,
1419 ext2fs_block_bitmap *bitmap);
1420
1421 /* get_num_dirs.c */
1422 extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs);
1423
1424 /* getsize.c */
1425 extern errcode_t ext2fs_get_device_size(const char *file, int blocksize,
1426 blk_t *retblocks);
1427 extern errcode_t ext2fs_get_device_size2(const char *file, int blocksize,
1428 blk64_t *retblocks);
1429
1430 /* getsectsize.c */
1431 extern int ext2fs_get_dio_alignment(int fd);
1432 errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize);
1433 errcode_t ext2fs_get_device_phys_sectsize(const char *file, int *sectsize);
1434
1435 /* i_block.c */
1436 errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode,
1437 blk64_t num_blocks);
1438 errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode,
1439 blk64_t num_blocks);
1440 errcode_t ext2fs_iblk_set(ext2_filsys fs, struct ext2_inode *inode, blk64_t b);
1441
1442 /* imager.c */
1443 extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags);
1444 extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags);
1445 extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags);
1446 extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags);
1447 extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags);
1448 extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags);
1449
1450 /* ind_block.c */
1451 errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf);
1452 errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf);
1453
1454 /* initialize.c */
1455 extern errcode_t ext2fs_initialize(const char *name, int flags,
1456 struct ext2_super_block *param,
1457 io_manager manager, ext2_filsys *ret_fs);
1458
1459 /* icount.c */
1460 extern void ext2fs_free_icount(ext2_icount_t icount);
1461 extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir,
1462 int flags, ext2_icount_t *ret);
1463 extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags,
1464 unsigned int size,
1465 ext2_icount_t hint, ext2_icount_t *ret);
1466 extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags,
1467 unsigned int size,
1468 ext2_icount_t *ret);
1469 extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino,
1470 __u16 *ret);
1471 extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino,
1472 __u16 *ret);
1473 extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino,
1474 __u16 *ret);
1475 extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino,
1476 __u16 count);
1477 extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount);
1478 errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *);
1479
1480 /* inline.c */
1481
1482 extern errcode_t ext2fs_get_memalign(unsigned long size,
1483 unsigned long align, void *ptr);
1484
1485 /* inline_data.c */
1486 extern errcode_t ext2fs_inline_data_init(ext2_filsys fs, ext2_ino_t ino);
1487 extern errcode_t ext2fs_inline_data_size(ext2_filsys fs, ext2_ino_t ino,
1488 size_t *size);
1489 extern errcode_t ext2fs_inline_data_get(ext2_filsys fs, ext2_ino_t ino,
1490 struct ext2_inode *inode,
1491 void *buf, size_t *size);
1492 extern errcode_t ext2fs_inline_data_set(ext2_filsys fs, ext2_ino_t ino,
1493 struct ext2_inode *inode,
1494 void *buf, size_t size);
1495
1496 /* inode.c */
1497 extern errcode_t ext2fs_create_inode_cache(ext2_filsys fs,
1498 unsigned int cache_size);
1499 extern void ext2fs_free_inode_cache(struct ext2_inode_cache *icache);
1500 extern errcode_t ext2fs_flush_icache(ext2_filsys fs);
1501 extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan,
1502 ext2_ino_t *ino,
1503 struct ext2_inode *inode,
1504 int bufsize);
1505 #define EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS 8
1506 extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks,
1507 ext2_inode_scan *ret_scan);
1508 extern void ext2fs_close_inode_scan(ext2_inode_scan scan);
1509 extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino,
1510 struct ext2_inode *inode);
1511 extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan,
1512 int group);
1513 extern void ext2fs_set_inode_callback
1514 (ext2_inode_scan scan,
1515 errcode_t (*done_group)(ext2_filsys fs,
1516 ext2_inode_scan scan,
1517 dgrp_t group,
1518 void * priv_data),
1519 void *done_group_data);
1520 extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags,
1521 int clear_flags);
1522 extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
1523 struct ext2_inode * inode,
1524 int bufsize);
1525 extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino,
1526 struct ext2_inode * inode);
1527 extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
1528 struct ext2_inode * inode,
1529 int bufsize);
1530 extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino,
1531 struct ext2_inode * inode);
1532 extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino,
1533 struct ext2_inode * inode);
1534 extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
1535 extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino);
1536
1537 /* inode_io.c */
1538 extern io_manager inode_io_manager;
1539 extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino,
1540 char **name);
1541 extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino,
1542 struct ext2_inode *inode,
1543 char **name);
1544
1545 /* ismounted.c */
1546 extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags);
1547 extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
1548 char *mtpt, int mtlen);
1549
1550 /* punch.c */
1551 /*
1552 * NOTE: This function removes from an inode the blocks "start", "end", and
1553 * every block in between.
1554 */
1555 extern errcode_t ext2fs_punch(ext2_filsys fs, ext2_ino_t ino,
1556 struct ext2_inode *inode,
1557 char *block_buf, blk64_t start,
1558 blk64_t end);
1559
1560 /* namei.c */
1561 extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name,
1562 int namelen, char *buf, ext2_ino_t *inode);
1563 extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1564 const char *name, ext2_ino_t *inode);
1565 errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1566 const char *name, ext2_ino_t *inode);
1567 extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
1568 ext2_ino_t inode, ext2_ino_t *res_inode);
1569
1570 /* native.c */
1571 int ext2fs_native_flag(void);
1572
1573 /* newdir.c */
1574 extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
1575 ext2_ino_t parent_ino, char **block);
1576 extern errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs, ext2_ino_t dir_ino,
1577 ext2_ino_t parent_ino, __u32 *iblock);
1578
1579 /* mkdir.c */
1580 extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
1581 const char *name);
1582
1583 /* mkjournal.c */
1584 extern errcode_t ext2fs_zero_blocks(ext2_filsys fs, blk_t blk, int num,
1585 blk_t *ret_blk, int *ret_count);
1586 extern errcode_t ext2fs_zero_blocks2(ext2_filsys fs, blk64_t blk, int num,
1587 blk64_t *ret_blk, int *ret_count);
1588 extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
1589 __u32 num_blocks, int flags,
1590 char **ret_jsb);
1591 extern errcode_t ext2fs_add_journal_device(ext2_filsys fs,
1592 ext2_filsys journal_dev);
1593 extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t num_blocks,
1594 int flags);
1595 extern errcode_t ext2fs_add_journal_inode2(ext2_filsys fs, blk_t num_blocks,
1596 blk64_t goal, int flags);
1597 extern int ext2fs_default_journal_size(__u64 num_blocks);
1598 extern int ext2fs_journal_sb_start(int blocksize);
1599
1600 /* openfs.c */
1601 extern errcode_t ext2fs_open(const char *name, int flags, int superblock,
1602 unsigned int block_size, io_manager manager,
1603 ext2_filsys *ret_fs);
1604 extern errcode_t ext2fs_open2(const char *name, const char *io_options,
1605 int flags, int superblock,
1606 unsigned int block_size, io_manager manager,
1607 ext2_filsys *ret_fs);
1608 /*
1609 * The dgrp_t argument to these two functions is not actually a group number
1610 * but a block number offset within a group table! Convert with the formula
1611 * (group_number / groups_per_block).
1612 */
1613 extern blk64_t ext2fs_descriptor_block_loc2(ext2_filsys fs,
1614 blk64_t group_block, dgrp_t i);
1615 extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block,
1616 dgrp_t i);
1617 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io);
1618 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io);
1619 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io);
1620
1621 /* get_pathname.c */
1622 extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
1623 char **name);
1624
1625 /* link.c */
1626 errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name,
1627 ext2_ino_t ino, int flags);
1628 errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name,
1629 ext2_ino_t ino, int flags);
1630
1631 /* symlink.c */
1632 errcode_t ext2fs_symlink(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t ino,
1633 const char *name, const char *target);
1634 int ext2fs_is_fast_symlink(struct ext2_inode *inode);
1635
1636 /* mmp.c */
1637 errcode_t ext2fs_mmp_read(ext2_filsys fs, blk64_t mmp_blk, void *buf);
1638 errcode_t ext2fs_mmp_write(ext2_filsys fs, blk64_t mmp_blk, void *buf);
1639 errcode_t ext2fs_mmp_clear(ext2_filsys fs);
1640 errcode_t ext2fs_mmp_init(ext2_filsys fs);
1641 errcode_t ext2fs_mmp_start(ext2_filsys fs);
1642 errcode_t ext2fs_mmp_update(ext2_filsys fs);
1643 errcode_t ext2fs_mmp_update2(ext2_filsys fs, int immediately);
1644 errcode_t ext2fs_mmp_stop(ext2_filsys fs);
1645 unsigned ext2fs_mmp_new_seq(void);
1646
1647 /* read_bb.c */
1648 extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs,
1649 ext2_badblocks_list *bb_list);
1650
1651 /* read_bb_file.c */
1652 extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f,
1653 ext2_badblocks_list *bb_list,
1654 void *priv_data,
1655 void (*invalid)(ext2_filsys fs,
1656 blk_t blk,
1657 char *badstr,
1658 void *priv_data));
1659 extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f,
1660 ext2_badblocks_list *bb_list,
1661 void (*invalid)(ext2_filsys fs,
1662 blk_t blk));
1663
1664 /* res_gdt.c */
1665 extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs);
1666
1667 /*sha256.c */
1668 #define EXT2FS_SHA256_LENGTH 32
1669 #if 0
1670 extern void ext2fs_sha256(const unsigned char *in, unsigned long in_size,
1671 unsigned char out[EXT2FS_SHA256_LENGTH]);
1672 #endif
1673
1674 /* sha512.c */
1675 #define EXT2FS_SHA512_LENGTH 64
1676 extern void ext2fs_sha512(const unsigned char *in, unsigned long in_size,
1677 unsigned char out[EXT2FS_SHA512_LENGTH]);
1678
1679 /* swapfs.c */
1680 extern errcode_t ext2fs_dirent_swab_in2(ext2_filsys fs, char *buf, size_t size,
1681 int flags);
1682 extern errcode_t ext2fs_dirent_swab_in(ext2_filsys fs, char *buf, int flags);
1683 extern errcode_t ext2fs_dirent_swab_out2(ext2_filsys fs, char *buf, size_t size,
1684 int flags);
1685 extern errcode_t ext2fs_dirent_swab_out(ext2_filsys fs, char *buf, int flags);
1686 extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize,
1687 int has_header);
1688 extern void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
1689 struct ext2_ext_attr_header *from_hdr);
1690 extern void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
1691 struct ext2_ext_attr_entry *from_entry);
1692 extern void ext2fs_swap_super(struct ext2_super_block * super);
1693 extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp);
1694 extern void ext2fs_swap_group_desc2(ext2_filsys, struct ext2_group_desc *gdp);
1695 extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
1696 struct ext2_inode_large *f, int hostorder,
1697 int bufsize);
1698 extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t,
1699 struct ext2_inode *f, int hostorder);
1700 extern void ext2fs_swap_mmp(struct mmp_struct *mmp);
1701
1702 /* unix_io.c */
1703 extern int ext2fs_open_file(const char *pathname, int flags, mode_t mode);
1704 extern int ext2fs_stat(const char *path, ext2fs_struct_stat *buf);
1705 extern int ext2fs_fstat(int fd, ext2fs_struct_stat *buf);
1706
1707 /* valid_blk.c */
1708 extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode);
1709 extern int ext2fs_inode_has_valid_blocks2(ext2_filsys fs,
1710 struct ext2_inode *inode);
1711
1712 /* version.c */
1713 extern int ext2fs_parse_version_string(const char *ver_string);
1714 extern int ext2fs_get_library_version(const char **ver_string,
1715 const char **date_string);
1716
1717 /* write_bb_file.c */
1718 extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list,
1719 unsigned int flags,
1720 FILE *f);
1721
1722
1723 /* inline functions */
1724 #ifdef NO_INLINE_FUNCS
1725 extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr);
1726 extern errcode_t ext2fs_get_memzero(unsigned long size, void *ptr);
1727 extern errcode_t ext2fs_get_array(unsigned long count,
1728 unsigned long size, void *ptr);
1729 extern errcode_t ext2fs_get_arrayzero(unsigned long count,
1730 unsigned long size, void *ptr);
1731 extern errcode_t ext2fs_free_mem(void *ptr);
1732 extern errcode_t ext2fs_resize_mem(unsigned long old_size,
1733 unsigned long size, void *ptr);
1734 extern void ext2fs_mark_super_dirty(ext2_filsys fs);
1735 extern void ext2fs_mark_changed(ext2_filsys fs);
1736 extern int ext2fs_test_changed(ext2_filsys fs);
1737 extern void ext2fs_mark_valid(ext2_filsys fs);
1738 extern void ext2fs_unmark_valid(ext2_filsys fs);
1739 extern int ext2fs_test_valid(ext2_filsys fs);
1740 extern void ext2fs_mark_ib_dirty(ext2_filsys fs);
1741 extern void ext2fs_mark_bb_dirty(ext2_filsys fs);
1742 extern int ext2fs_test_ib_dirty(ext2_filsys fs);
1743 extern int ext2fs_test_bb_dirty(ext2_filsys fs);
1744 extern dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk);
1745 extern dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino);
1746 extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group);
1747 extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group);
1748 extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1749 struct ext2_inode *inode);
1750 extern int ext2fs_htree_intnode_maxrecs(ext2_filsys fs, int blocks);
1751 extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b);
1752 extern __u64 ext2fs_div64_ceil(__u64 a, __u64 b);
1753 extern int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry);
1754 extern void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len);
1755 extern int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry);
1756 extern void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type);
1757 extern struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode);
1758 extern const struct ext2_inode *ext2fs_const_inode(const struct ext2_inode_large * large_inode);
1759
1760 #endif
1761
1762 /*
1763 * The actual inlined functions definitions themselves...
1764 *
1765 * If NO_INLINE_FUNCS is defined, then we won't try to do inline
1766 * functions at all!
1767 */
1768 #if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
1769 #ifdef INCLUDE_INLINE_FUNCS
1770 #define _INLINE_ extern
1771 #else
1772 #if (__STDC_VERSION__ >= 199901L)
1773 #define _INLINE_ inline
1774 #else
1775 #ifdef __GNUC__
1776 #define _INLINE_ extern __inline__
1777 #else /* For Watcom C */
1778 #define _INLINE_ extern inline
1779 #endif /* __GNUC__ */
1780 #endif /* __STDC_VERSION__ >= 199901L */
1781 #endif
1782
1783 #ifndef EXT2_CUSTOM_MEMORY_ROUTINES
1784 #include <string.h>
1785 /*
1786 * Allocate memory. The 'ptr' arg must point to a pointer.
1787 */
1788 _INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
1789 {
1790 void *pp;
1791
1792 pp = malloc(size);
1793 if (!pp)
1794 return EXT2_ET_NO_MEMORY;
1795 memcpy(ptr, &pp, sizeof (pp));
1796 return 0;
1797 }
1798
1799 _INLINE_ errcode_t ext2fs_get_memzero(unsigned long size, void *ptr)
1800 {
1801 void *pp;
1802
1803 pp = malloc(size);
1804 if (!pp)
1805 return EXT2_ET_NO_MEMORY;
1806 memset(pp, 0, size);
1807 memcpy(ptr, &pp, sizeof(pp));
1808 return 0;
1809 }
1810
1811 _INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr)
1812 {
1813 if (count && (~0UL)/count < size)
1814 return EXT2_ET_NO_MEMORY;
1815 return ext2fs_get_mem(count*size, ptr);
1816 }
1817
1818 _INLINE_ errcode_t ext2fs_get_arrayzero(unsigned long count,
1819 unsigned long size, void *ptr)
1820 {
1821 void *pp;
1822
1823 if (count && (~0UL)/count < size)
1824 return EXT2_ET_NO_MEMORY;
1825 pp = calloc(count, size);
1826 if (!pp)
1827 return EXT2_ET_NO_MEMORY;
1828 memcpy(ptr, &pp, sizeof(pp));
1829 return 0;
1830 }
1831
1832 /*
1833 * Free memory. The 'ptr' arg must point to a pointer.
1834 */
1835 _INLINE_ errcode_t ext2fs_free_mem(void *ptr)
1836 {
1837 void *p;
1838
1839 memcpy(&p, ptr, sizeof(p));
1840 free(p);
1841 p = 0;
1842 memcpy(ptr, &p, sizeof(p));
1843 return 0;
1844 }
1845
1846 /*
1847 * Resize memory. The 'ptr' arg must point to a pointer.
1848 */
1849 _INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
1850 unsigned long size, void *ptr)
1851 {
1852 void *p;
1853
1854 /* Use "memcpy" for pointer assignments here to avoid problems
1855 * with C99 strict type aliasing rules. */
1856 memcpy(&p, ptr, sizeof(p));
1857 p = realloc(p, size);
1858 if (!p)
1859 return EXT2_ET_NO_MEMORY;
1860 memcpy(ptr, &p, sizeof(p));
1861 return 0;
1862 }
1863 #endif /* Custom memory routines */
1864
1865 /*
1866 * Mark a filesystem superblock as dirty
1867 */
1868 _INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs)
1869 {
1870 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED;
1871 }
1872
1873 /*
1874 * Mark a filesystem as changed
1875 */
1876 _INLINE_ void ext2fs_mark_changed(ext2_filsys fs)
1877 {
1878 fs->flags |= EXT2_FLAG_CHANGED;
1879 }
1880
1881 /*
1882 * Check to see if a filesystem has changed
1883 */
1884 _INLINE_ int ext2fs_test_changed(ext2_filsys fs)
1885 {
1886 return (fs->flags & EXT2_FLAG_CHANGED);
1887 }
1888
1889 /*
1890 * Mark a filesystem as valid
1891 */
1892 _INLINE_ void ext2fs_mark_valid(ext2_filsys fs)
1893 {
1894 fs->flags |= EXT2_FLAG_VALID;
1895 }
1896
1897 /*
1898 * Mark a filesystem as NOT valid
1899 */
1900 _INLINE_ void ext2fs_unmark_valid(ext2_filsys fs)
1901 {
1902 fs->flags &= ~EXT2_FLAG_VALID;
1903 }
1904
1905 /*
1906 * Check to see if a filesystem is valid
1907 */
1908 _INLINE_ int ext2fs_test_valid(ext2_filsys fs)
1909 {
1910 return (fs->flags & EXT2_FLAG_VALID);
1911 }
1912
1913 /*
1914 * Mark the inode bitmap as dirty
1915 */
1916 _INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs)
1917 {
1918 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED;
1919 }
1920
1921 /*
1922 * Mark the block bitmap as dirty
1923 */
1924 _INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs)
1925 {
1926 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED;
1927 }
1928
1929 /*
1930 * Check to see if a filesystem's inode bitmap is dirty
1931 */
1932 _INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs)
1933 {
1934 return (fs->flags & EXT2_FLAG_IB_DIRTY);
1935 }
1936
1937 /*
1938 * Check to see if a filesystem's block bitmap is dirty
1939 */
1940 _INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs)
1941 {
1942 return (fs->flags & EXT2_FLAG_BB_DIRTY);
1943 }
1944
1945 /*
1946 * Return the group # of a block
1947 */
1948 _INLINE_ dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
1949 {
1950 return ext2fs_group_of_blk2(fs, blk);
1951 }
1952 /*
1953 * Return the group # of an inode number
1954 */
1955 _INLINE_ dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
1956 {
1957 return (ino - 1) / fs->super->s_inodes_per_group;
1958 }
1959
1960 /*
1961 * Return the first block (inclusive) in a group
1962 */
1963 _INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group)
1964 {
1965 return (blk_t) ext2fs_group_first_block2(fs, group);
1966 }
1967
1968 /*
1969 * Return the last block (inclusive) in a group
1970 */
1971 _INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group)
1972 {
1973 return (blk_t) ext2fs_group_last_block2(fs, group);
1974 }
1975
1976 _INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1977 struct ext2_inode *inode)
1978 {
1979 return (blk_t) ext2fs_inode_data_blocks2(fs, inode);
1980 }
1981
1982 _INLINE_ int ext2fs_htree_intnode_maxrecs(ext2_filsys fs, int blocks)
1983 {
1984 return blocks * ((fs->blocksize - 8) / sizeof(struct ext2_dx_entry));
1985 }
1986
1987 /*
1988 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
1989 */
1990 _INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b)
1991 {
1992 if (!a)
1993 return 0;
1994 return ((a - 1) / b) + 1;
1995 }
1996
1997 _INLINE_ __u64 ext2fs_div64_ceil(__u64 a, __u64 b)
1998 {
1999 if (!a)
2000 return 0;
2001 return ((a - 1) / b) + 1;
2002 }
2003
2004 _INLINE_ int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry)
2005 {
2006 return entry->name_len & 0xff;
2007 }
2008
2009 _INLINE_ void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len)
2010 {
2011 entry->name_len = (entry->name_len & 0xff00) | (len & 0xff);
2012 }
2013
2014 _INLINE_ int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry)
2015 {
2016 return entry->name_len >> 8;
2017 }
2018
2019 _INLINE_ void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type)
2020 {
2021 entry->name_len = (entry->name_len & 0xff) | (type << 8);
2022 }
2023
2024 _INLINE_ struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode)
2025 {
2026 /* It is always safe to convert large inode to a small inode */
2027 return (struct ext2_inode *) large_inode;
2028 }
2029
2030 _INLINE_ const struct ext2_inode *
2031 ext2fs_const_inode(const struct ext2_inode_large * large_inode)
2032 {
2033 /* It is always safe to convert large inode to a small inode */
2034 return (const struct ext2_inode *) large_inode;
2035 }
2036
2037 #undef _INLINE_
2038 #endif
2039
2040 /* htree levels for ext4 */
2041 #define EXT4_HTREE_LEVEL_COMPAT 2
2042 #define EXT4_HTREE_LEVEL 3
2043
2044 static inline unsigned int ext2_dir_htree_level(ext2_filsys fs)
2045 {
2046 if (ext2fs_has_feature_largedir(fs->super))
2047 return EXT4_HTREE_LEVEL;
2048
2049 return EXT4_HTREE_LEVEL_COMPAT;
2050 }
2051
2052 #ifdef __cplusplus
2053 }
2054 #endif
2055
2056 #endif /* _EXT2FS_EXT2FS_H */
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