4 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Public
12 #ifndef _EXT2FS_EXT2FS_H
13 #define _EXT2FS_EXT2FS_H
16 #define EXT2FS_ATTR(x) __attribute__(x)
18 #define EXT2FS_ATTR(x)
26 * Non-GNU C compilers won't necessarily understand inline
28 #if (!defined(__GNUC__) && !defined(__WATCOMC__))
29 #define NO_INLINE_FUNCS
33 * Where the master copy of the superblock is located, and how big
34 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because
35 * the size of the superblock structure is not necessarily trustworthy
36 * (some versions have the padding set up so that the superblock is
39 #define SUPERBLOCK_OFFSET 1024
40 #define SUPERBLOCK_SIZE 1024
43 * The last ext2fs revision level that this version of the library is
46 #define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV
48 #ifdef HAVE_SYS_TYPES_H
49 #include <sys/types.h>
56 #if EXT2_FLAT_INCLUDES
59 #include "ext3_extents.h"
61 #include <ext2fs/ext2_types.h>
62 #include <ext2fs/ext2_fs.h>
63 #include <ext2fs/ext3_extents.h>
64 #endif /* EXT2_FLAT_INCLUDES */
66 typedef __u32 ext2_ino_t;
68 typedef __u64 blk64_t;
70 typedef __u32 ext2_off_t;
71 typedef __s64 e2_blkcnt_t;
72 typedef __u32 ext2_dirhash_t;
74 #if EXT2_FLAT_INCLUDES
78 #include "ext2_ext_attr.h"
80 #include <et/com_err.h>
81 #include <ext2fs/ext2_io.h>
82 #include <ext2fs/ext2_err.h>
83 #include <ext2fs/ext2_ext_attr.h>
87 * Portability help for Microsoft Visual C++
90 #define EXT2_QSORT_TYPE int __cdecl
92 #define EXT2_QSORT_TYPE int
95 typedef struct struct_ext2_filsys *ext2_filsys;
97 #define EXT2FS_MARK_ERROR 0
98 #define EXT2FS_UNMARK_ERROR 1
99 #define EXT2FS_TEST_ERROR 2
101 typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap;
102 typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap;
103 typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap;
105 #define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s)
109 * Badblocks list definitions
112 typedef struct ext2_struct_u32_list *ext2_badblocks_list;
113 typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate;
115 typedef struct ext2_struct_u32_list *ext2_u32_list;
116 typedef struct ext2_struct_u32_iterate *ext2_u32_iterate;
119 typedef struct ext2_struct_u32_list *badblocks_list;
120 typedef struct ext2_struct_u32_iterate *badblocks_iterate;
122 #define BADBLOCKS_FLAG_DIRTY 1
125 * ext2_dblist structure and abstractions (see dblist.c)
127 struct ext2_db_entry {
133 typedef struct ext2_struct_dblist *ext2_dblist;
135 #define DBLIST_ABORT 1
138 * ext2_fileio definitions
141 #define EXT2_FILE_WRITE 0x0001
142 #define EXT2_FILE_CREATE 0x0002
144 #define EXT2_FILE_MASK 0x00FF
146 #define EXT2_FILE_BUF_DIRTY 0x4000
147 #define EXT2_FILE_BUF_VALID 0x2000
149 typedef struct ext2_file *ext2_file_t;
151 #define EXT2_SEEK_SET 0
152 #define EXT2_SEEK_CUR 1
153 #define EXT2_SEEK_END 2
156 * Flags for the ext2_filsys structure and for ext2fs_open()
158 #define EXT2_FLAG_RW 0x01
159 #define EXT2_FLAG_CHANGED 0x02
160 #define EXT2_FLAG_DIRTY 0x04
161 #define EXT2_FLAG_VALID 0x08
162 #define EXT2_FLAG_IB_DIRTY 0x10
163 #define EXT2_FLAG_BB_DIRTY 0x20
164 #define EXT2_FLAG_SWAP_BYTES 0x40
165 #define EXT2_FLAG_SWAP_BYTES_READ 0x80
166 #define EXT2_FLAG_SWAP_BYTES_WRITE 0x100
167 #define EXT2_FLAG_MASTER_SB_ONLY 0x200
168 #define EXT2_FLAG_FORCE 0x400
169 #define EXT2_FLAG_SUPER_ONLY 0x800
170 #define EXT2_FLAG_JOURNAL_DEV_OK 0x1000
171 #define EXT2_FLAG_IMAGE_FILE 0x2000
172 #define EXT2_FLAG_EXCLUSIVE 0x4000
173 #define EXT2_FLAG_SOFTSUPP_FEATURES 0x8000
174 #define EXT2_FLAG_NOFREE_ON_ERROR 0x10000
177 * Special flag in the ext2 inode i_flag field that means that this is
178 * a new inode. (So that ext2_write_inode() can clear extra fields.)
180 #define EXT2_NEW_INODE_FL 0x80000000
183 * Flags for mkjournal
185 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock
187 #define EXT2_MKJOURNAL_V1_SUPER 0x0000001
189 struct struct_ext2_filsys {
194 struct ext2_super_block * super;
195 unsigned int blocksize;
197 dgrp_t group_desc_count;
198 unsigned long desc_blocks;
199 struct ext2_group_desc * group_desc;
200 int inode_blocks_per_group;
201 ext2fs_inode_bitmap inode_map;
202 ext2fs_block_bitmap block_map;
203 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
204 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino);
205 errcode_t (*write_bitmaps)(ext2_filsys fs);
206 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino,
207 struct ext2_inode *inode);
208 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino,
209 struct ext2_inode *inode);
210 ext2_badblocks_list badblocks;
212 __u32 stride; /* for mke2fs */
213 struct ext2_super_block * orig_super;
214 struct ext2_image_hdr * image_header;
218 * Reserved for future expansion
223 * Reserved for the use of the calling application.
230 struct ext2_inode_cache *icache;
234 #if EXT2_FLAT_INCLUDES
235 #include "e2_bitops.h"
237 #include <ext2fs/bitops.h>
241 * Return flags for the block iterator functions
243 #define BLOCK_CHANGED 1
244 #define BLOCK_ABORT 2
245 #define BLOCK_ERROR 4
248 * Block interate flags
250 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator
251 * function should be called on blocks where the block number is zero.
252 * This is used by ext2fs_expand_dir() to be able to add a new block
253 * to an inode. It can also be used for programs that want to be able
254 * to deal with files that contain "holes".
256 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for
257 * the indirect, doubly indirect, etc. blocks should be called after
258 * all of the blocks containined in the indirect blocks are processed.
259 * This is useful if you are going to be deallocating blocks from an
262 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be
263 * called for data blocks only.
265 * BLOCK_FLAG_READ_ONLY is a promise by the caller that it will not
266 * modify returned block number.
268 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs
269 * ext2fs_block_iterate2 that large files won't be accepted.
271 #define BLOCK_FLAG_APPEND 1
272 #define BLOCK_FLAG_HOLE 1
273 #define BLOCK_FLAG_DEPTH_TRAVERSE 2
274 #define BLOCK_FLAG_DATA_ONLY 4
275 #define BLOCK_FLAG_READ_ONLY 8
277 #define BLOCK_FLAG_NO_LARGE 0x1000
280 * Magic "block count" return values for the block iterator function.
282 #define BLOCK_COUNT_IND (-1)
283 #define BLOCK_COUNT_DIND (-2)
284 #define BLOCK_COUNT_TIND (-3)
285 #define BLOCK_COUNT_TRANSLATOR (-4)
289 * Flags for ext2fs_move_blocks
291 #define EXT2_BMOVE_GET_DBLIST 0x0001
292 #define EXT2_BMOVE_DEBUG 0x0002
296 * Generic (non-filesystem layout specific) extents structure
299 #define EXT2_EXTENT_FLAGS_LEAF 0x0001
300 #define EXT2_EXTENT_FLAGS_UNINIT 0x0002
301 #define EXT2_EXTENT_FLAGS_SECOND_VISIT 0x0004
303 struct ext2fs_extent {
304 blk64_t e_pblk; /* first physical block */
305 blk64_t e_lblk; /* first logical block extent covers */
306 __u32 e_len; /* number of blocks covered by extent */
307 __u32 e_flags; /* extent flags */
310 typedef struct ext2_extent_handle *ext2_extent_handle_t;
311 typedef struct ext2_extent_path *ext2_extent_path_t;
314 * Flags used by ext2fs_extent_get()
316 #define EXT2_EXTENT_CURRENT 0x0000
317 #define EXT2_EXTENT_MOVE_MASK 0x000F
318 #define EXT2_EXTENT_ROOT 0x0001
319 #define EXT2_EXTENT_LAST_LEAF 0x0002
320 #define EXT2_EXTENT_FIRST_SIB 0x0003
321 #define EXT2_EXTENT_LAST_SIB 0x0004
322 #define EXT2_EXTENT_NEXT_SIB 0x0005
323 #define EXT2_EXTENT_PREV_SIB 0x0006
324 #define EXT2_EXTENT_NEXT_LEAF 0x0007
325 #define EXT2_EXTENT_PREV_LEAF 0x0008
326 #define EXT2_EXTENT_NEXT 0x0009
327 #define EXT2_EXTENT_PREV 0x000A
328 #define EXT2_EXTENT_UP 0x000B
329 #define EXT2_EXTENT_DOWN 0x000C
330 #define EXT2_EXTENT_DOWN_AND_LAST 0x000D
333 * Flags used by ext2fs_extent_insert()
336 #define EXT2_EXTENT_INSERT_AFTER 0x0001
339 * Data structure returned by ext2fs_extent_get_info()
341 struct ext2_extent_info {
351 __u32 max_uninit_len;
355 * Flags for directory block reading and writing functions
357 #define EXT2_DIRBLOCK_V2_STRUCT 0x0001
360 * Return flags for the directory iterator functions
362 #define DIRENT_CHANGED 1
363 #define DIRENT_ABORT 2
364 #define DIRENT_ERROR 3
367 * Directory iterator flags
370 #define DIRENT_FLAG_INCLUDE_EMPTY 1
371 #define DIRENT_FLAG_INCLUDE_REMOVED 2
373 #define DIRENT_DOT_FILE 1
374 #define DIRENT_DOT_DOT_FILE 2
375 #define DIRENT_OTHER_FILE 3
376 #define DIRENT_DELETED_FILE 4
379 * Inode scan definitions
381 typedef struct ext2_struct_inode_scan *ext2_inode_scan;
386 #define EXT2_SF_CHK_BADBLOCKS 0x0001
387 #define EXT2_SF_BAD_INODE_BLK 0x0002
388 #define EXT2_SF_BAD_EXTRA_BYTES 0x0004
389 #define EXT2_SF_SKIP_MISSING_ITABLE 0x0008
390 #define EXT2_SF_DO_LAZY 0x0010
393 * ext2fs_check_if_mounted flags
395 #define EXT2_MF_MOUNTED 1
396 #define EXT2_MF_ISROOT 2
397 #define EXT2_MF_READONLY 4
398 #define EXT2_MF_SWAP 8
399 #define EXT2_MF_BUSY 16
402 * Ext2/linux mode flags. We define them here so that we don't need
403 * to depend on the OS's sys/stat.h, since we may be compiling on a
406 #define LINUX_S_IFMT 00170000
407 #define LINUX_S_IFSOCK 0140000
408 #define LINUX_S_IFLNK 0120000
409 #define LINUX_S_IFREG 0100000
410 #define LINUX_S_IFBLK 0060000
411 #define LINUX_S_IFDIR 0040000
412 #define LINUX_S_IFCHR 0020000
413 #define LINUX_S_IFIFO 0010000
414 #define LINUX_S_ISUID 0004000
415 #define LINUX_S_ISGID 0002000
416 #define LINUX_S_ISVTX 0001000
418 #define LINUX_S_IRWXU 00700
419 #define LINUX_S_IRUSR 00400
420 #define LINUX_S_IWUSR 00200
421 #define LINUX_S_IXUSR 00100
423 #define LINUX_S_IRWXG 00070
424 #define LINUX_S_IRGRP 00040
425 #define LINUX_S_IWGRP 00020
426 #define LINUX_S_IXGRP 00010
428 #define LINUX_S_IRWXO 00007
429 #define LINUX_S_IROTH 00004
430 #define LINUX_S_IWOTH 00002
431 #define LINUX_S_IXOTH 00001
433 #define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK)
434 #define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG)
435 #define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR)
436 #define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR)
437 #define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK)
438 #define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO)
439 #define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK)
442 * ext2 size of an inode
444 #define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32))
447 * ext2_icount_t abstraction
449 #define EXT2_ICOUNT_OPT_INCREMENT 0x01
451 typedef struct ext2_icount *ext2_icount_t;
454 * Flags for ext2fs_bmap
456 #define BMAP_ALLOC 0x0001
457 #define BMAP_SET 0x0002
460 * Returned flags from ext2fs_bmap
462 #define BMAP_RET_UNINIT 0x0001
465 * Flags for imager.c functions
467 #define IMAGER_FLAG_INODEMAP 1
468 #define IMAGER_FLAG_SPARSEWRITE 2
471 * For checking structure magic numbers...
474 #define EXT2_CHECK_MAGIC(struct, code) \
475 if ((struct)->magic != (code)) return (code)
479 * For ext2 compression support
481 #define EXT2FS_COMPRESSED_BLKADDR ((blk_t) -1)
482 #define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR)
485 * Features supported by this version of the library
487 #define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\
488 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\
489 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\
490 EXT2_FEATURE_COMPAT_RESIZE_INODE|\
491 EXT2_FEATURE_COMPAT_DIR_INDEX|\
492 EXT2_FEATURE_COMPAT_LAZY_BG|\
493 EXT2_FEATURE_COMPAT_EXT_ATTR)
495 /* This #ifdef is temporary until compression is fully supported */
496 #ifdef ENABLE_COMPRESSION
497 #ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL
498 /* If the below warning bugs you, then have
499 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your
500 environment at configure time. */
501 #warning "Compression support is experimental"
503 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\
504 EXT2_FEATURE_INCOMPAT_COMPRESSION|\
505 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\
506 EXT2_FEATURE_INCOMPAT_META_BG|\
507 EXT3_FEATURE_INCOMPAT_RECOVER|\
508 EXT3_FEATURE_INCOMPAT_EXTENTS|\
509 EXT4_FEATURE_INCOMPAT_FLEX_BG)
511 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\
512 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\
513 EXT2_FEATURE_INCOMPAT_META_BG|\
514 EXT3_FEATURE_INCOMPAT_RECOVER|\
515 EXT3_FEATURE_INCOMPAT_EXTENTS|\
516 EXT4_FEATURE_INCOMPAT_FLEX_BG)
518 #define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\
519 EXT2_FEATURE_RO_COMPAT_LARGE_FILE)
522 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed
525 #define EXT2_LIB_SOFTSUPP_INCOMPAT (EXT3_FEATURE_INCOMPAT_EXTENTS)
526 #define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\
527 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\
528 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\
529 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)
532 * function prototypes
536 extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode,
537 ext2fs_inode_bitmap map, ext2_ino_t *ret);
538 extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal,
539 ext2fs_block_bitmap map, blk_t *ret);
540 extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start,
541 blk_t finish, int num,
542 ext2fs_block_bitmap map,
544 extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal,
545 char *block_buf, blk_t *ret);
548 extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs,
550 ext2fs_block_bitmap bmap);
553 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse);
554 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
555 int inuse, int isdir);
556 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse);
559 extern errcode_t ext2fs_allocate_tables(ext2_filsys fs);
560 extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group,
561 ext2fs_block_bitmap bmap);
564 extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size);
565 extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk);
566 extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk);
567 extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk);
568 extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb,
569 ext2_u32_iterate *ret);
570 extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk);
571 extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter);
572 extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest);
573 extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2);
575 extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret,
577 extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb,
579 extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb,
581 extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk);
582 extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk);
584 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb,
585 ext2_badblocks_iterate *ret);
586 extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter,
588 extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter);
589 extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src,
590 ext2_badblocks_list *dest);
591 extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1,
592 ext2_badblocks_list bb2);
593 extern int ext2fs_u32_list_count(ext2_u32_list bb);
596 extern errcode_t badblocks_list_create(badblocks_list *ret, int size);
597 extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk);
598 extern int badblocks_list_test(badblocks_list bb, blk_t blk);
599 extern errcode_t badblocks_list_iterate_begin(badblocks_list bb,
600 badblocks_iterate *ret);
601 extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk);
602 extern void badblocks_list_iterate_end(badblocks_iterate iter);
603 extern void badblocks_list_free(badblocks_list bb);
606 extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs,
607 ext2_badblocks_list bb_list);
610 extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap);
611 extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap);
612 extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
613 ext2fs_generic_bitmap *dest);
614 extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs);
615 extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs);
616 extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs);
617 extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs);
618 extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
620 ext2fs_block_bitmap *ret);
621 extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
623 ext2fs_inode_bitmap *ret);
624 extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
625 ext2_ino_t end, ext2_ino_t *oend);
626 extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
627 blk_t end, blk_t *oend);
628 extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap);
629 extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap);
630 extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs);
631 extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs);
632 extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
633 ext2fs_inode_bitmap bmap);
634 extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
635 ext2fs_block_bitmap bmap);
636 extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
637 ext2fs_block_bitmap bm2);
638 extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
639 ext2fs_inode_bitmap bm2);
640 extern errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap,
641 ext2_ino_t start, unsigned int num,
643 extern errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap,
644 ext2_ino_t start, unsigned int num,
646 extern errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap,
647 blk_t start, unsigned int num,
649 extern errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap,
650 blk_t start, unsigned int num,
655 extern errcode_t ext2fs_block_iterate(ext2_filsys fs,
659 int (*func)(ext2_filsys fs,
664 errcode_t ext2fs_block_iterate2(ext2_filsys fs,
668 int (*func)(ext2_filsys fs,
670 e2_blkcnt_t blockcnt,
677 extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino,
678 struct ext2_inode *inode,
679 char *block_buf, int bmap_flags,
680 blk_t block, blk_t *phys_blk);
681 extern errcode_t ext2fs_bmap2(ext2_filsys fs, ext2_ino_t ino,
682 struct ext2_inode *inode,
683 char *block_buf, int bmap_flags, blk64_t block,
684 int *ret_flags, blk64_t *phys_blk);
688 extern errcode_t ext2fs_move_blocks(ext2_filsys fs,
689 ext2fs_block_bitmap reserve,
690 ext2fs_block_bitmap alloc_map,
695 extern errcode_t ext2fs_check_desc(ext2_filsys fs);
698 extern errcode_t ext2fs_close(ext2_filsys fs);
699 extern errcode_t ext2fs_flush(ext2_filsys fs);
700 extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block);
701 extern int ext2fs_super_and_bgd_loc(ext2_filsys fs,
703 blk_t *ret_super_blk,
704 blk_t *ret_old_desc_blk,
705 blk_t *ret_new_desc_blk,
707 extern void ext2fs_update_dynamic_rev(ext2_filsys fs);
711 extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs);
712 extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist);
713 extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino,
714 blk_t blk, int blockcnt);
715 extern void ext2fs_dblist_sort(ext2_dblist dblist,
716 EXT2_QSORT_TYPE (*sortfunc)(const void *,
718 extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist,
719 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info,
722 extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino,
723 blk_t blk, int blockcnt);
724 extern errcode_t ext2fs_copy_dblist(ext2_dblist src,
726 extern int ext2fs_dblist_count(ext2_dblist dblist);
727 extern errcode_t ext2fs_dblist_get_last(ext2_dblist dblist,
728 struct ext2_db_entry **entry);
729 extern errcode_t ext2fs_dblist_drop_last(ext2_dblist dblist);
733 ext2fs_dblist_dir_iterate(ext2_dblist dblist,
736 int (*func)(ext2_ino_t dir,
738 struct ext2_dir_entry *dirent,
746 extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block,
748 extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block,
749 void *buf, int flags);
750 extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block,
752 extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block,
753 void *buf, int flags);
756 extern errcode_t ext2fs_dirhash(int version, const char *name, int len,
758 ext2_dirhash_t *ret_hash,
759 ext2_dirhash_t *ret_minor_hash);
763 extern errcode_t ext2fs_dir_iterate(ext2_filsys fs,
767 int (*func)(struct ext2_dir_entry *dirent,
773 extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs,
777 int (*func)(ext2_ino_t dir,
779 struct ext2_dir_entry *dirent,
787 extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest);
790 extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir);
793 extern __u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry,
795 extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf);
796 extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block,
798 extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk,
800 int adjust, __u32 *newcount);
803 extern errcode_t ext2fs_extent_header_verify(void *ptr, int size);
804 extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino,
805 ext2_extent_handle_t *handle);
806 extern errcode_t ext2fs_extent_get(ext2_extent_handle_t handle,
807 int flags, struct ext2fs_extent *extent);
808 extern errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle, int flags,
809 struct ext2fs_extent *extent);
810 extern errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags,
811 struct ext2fs_extent *extent);
812 extern errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags);
813 extern errcode_t ext2fs_extent_get_info(ext2_extent_handle_t handle,
814 struct ext2_extent_info *info);
815 extern errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle,
819 extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino,
820 struct ext2_inode *inode,
821 int flags, ext2_file_t *ret);
822 extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino,
823 int flags, ext2_file_t *ret);
824 extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file);
825 extern errcode_t ext2fs_file_close(ext2_file_t file);
826 extern errcode_t ext2fs_file_flush(ext2_file_t file);
827 extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf,
828 unsigned int wanted, unsigned int *got);
829 extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf,
830 unsigned int nbytes, unsigned int *written);
831 extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset,
832 int whence, __u64 *ret_pos);
833 extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset,
834 int whence, ext2_off_t *ret_pos);
835 errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size);
836 extern ext2_off_t ext2fs_file_get_size(ext2_file_t file);
837 extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size);
840 extern char *ext2fs_find_block_device(dev_t device);
843 extern errcode_t ext2fs_sync_device(int fd, int flushb);
846 extern void ext2fs_free(ext2_filsys fs);
847 extern void ext2fs_free_dblist(ext2_dblist dblist);
848 extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb);
849 extern void ext2fs_u32_list_free(ext2_u32_list bb);
852 extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap);
853 extern errcode_t ext2fs_make_generic_bitmap(errcode_t magic, ext2_filsys fs,
854 __u32 start, __u32 end,
856 const char *descr, char *init_map,
857 ext2fs_generic_bitmap *ret);
858 extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start,
862 ext2fs_generic_bitmap *ret);
863 extern errcode_t ext2fs_copy_generic_bitmap(ext2fs_generic_bitmap src,
864 ext2fs_generic_bitmap *dest);
865 extern void ext2fs_clear_generic_bitmap(ext2fs_generic_bitmap bitmap);
866 extern errcode_t ext2fs_fudge_generic_bitmap_end(ext2fs_inode_bitmap bitmap,
871 extern void ext2fs_set_generic_bitmap_padding(ext2fs_generic_bitmap map);
872 extern errcode_t ext2fs_resize_generic_bitmap(errcode_t magic,
875 ext2fs_generic_bitmap bmap);
876 extern errcode_t ext2fs_compare_generic_bitmap(errcode_t magic, errcode_t neq,
877 ext2fs_generic_bitmap bm1,
878 ext2fs_generic_bitmap bm2);
879 extern errcode_t ext2fs_get_generic_bitmap_range(ext2fs_generic_bitmap bmap,
881 __u32 start, __u32 num,
883 extern errcode_t ext2fs_set_generic_bitmap_range(ext2fs_generic_bitmap bmap,
885 __u32 start, __u32 num,
889 extern errcode_t ext2fs_get_device_size(const char *file, int blocksize,
893 errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize);
896 extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags);
897 extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags);
898 extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags);
899 extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags);
900 extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags);
901 extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags);
904 errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf);
905 errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf);
908 extern errcode_t ext2fs_initialize(const char *name, int flags,
909 struct ext2_super_block *param,
910 io_manager manager, ext2_filsys *ret_fs);
913 extern void ext2fs_free_icount(ext2_icount_t icount);
914 extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir,
915 int flags, ext2_icount_t *ret);
916 extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags,
918 ext2_icount_t hint, ext2_icount_t *ret);
919 extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags,
922 extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino,
924 extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino,
926 extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino,
928 extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino,
930 extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount);
931 errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *);
934 extern errcode_t ext2fs_flush_icache(ext2_filsys fs);
935 extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan,
937 struct ext2_inode *inode,
939 extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks,
940 ext2_inode_scan *ret_scan);
941 extern void ext2fs_close_inode_scan(ext2_inode_scan scan);
942 extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino,
943 struct ext2_inode *inode);
944 extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan,
946 extern void ext2fs_set_inode_callback
947 (ext2_inode_scan scan,
948 errcode_t (*done_group)(ext2_filsys fs,
949 ext2_inode_scan scan,
952 void *done_group_data);
953 extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags,
955 extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino,
956 struct ext2_inode * inode,
958 extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino,
959 struct ext2_inode * inode);
960 extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino,
961 struct ext2_inode * inode,
963 extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino,
964 struct ext2_inode * inode);
965 extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino,
966 struct ext2_inode * inode);
967 extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks);
968 extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino);
971 extern io_manager inode_io_manager;
972 extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino,
974 extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino,
975 struct ext2_inode *inode,
979 extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags);
980 extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags,
981 char *mtpt, int mtlen);
984 extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name,
985 int namelen, char *buf, ext2_ino_t *inode);
986 extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
987 const char *name, ext2_ino_t *inode);
988 errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
989 const char *name, ext2_ino_t *inode);
990 extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd,
991 ext2_ino_t inode, ext2_ino_t *res_inode);
994 int ext2fs_native_flag(void);
997 extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino,
998 ext2_ino_t parent_ino, char **block);
1001 extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum,
1005 extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs,
1006 __u32 size, int flags,
1008 extern errcode_t ext2fs_add_journal_device(ext2_filsys fs,
1009 ext2_filsys journal_dev);
1010 extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size,
1012 extern int ext2fs_default_journal_size(__u64 blocks);
1015 extern errcode_t ext2fs_open(const char *name, int flags, int superblock,
1016 unsigned int block_size, io_manager manager,
1017 ext2_filsys *ret_fs);
1018 extern errcode_t ext2fs_open2(const char *name, const char *io_options,
1019 int flags, int superblock,
1020 unsigned int block_size, io_manager manager,
1021 ext2_filsys *ret_fs);
1022 extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block,
1024 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io);
1025 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io);
1026 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io);
1028 /* get_pathname.c */
1029 extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino,
1033 errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name,
1034 ext2_ino_t ino, int flags);
1035 errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name,
1036 ext2_ino_t ino, int flags);
1039 extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs,
1040 ext2_badblocks_list *bb_list);
1042 /* read_bb_file.c */
1043 extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f,
1044 ext2_badblocks_list *bb_list,
1046 void (*invalid)(ext2_filsys fs,
1050 extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f,
1051 ext2_badblocks_list *bb_list,
1052 void (*invalid)(ext2_filsys fs,
1056 extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs);
1059 extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize,
1061 extern void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header,
1062 struct ext2_ext_attr_header *from_hdr);
1063 extern void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry,
1064 struct ext2_ext_attr_entry *from_entry);
1065 extern void ext2fs_swap_super(struct ext2_super_block * super);
1066 extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp);
1067 extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t,
1068 struct ext2_inode_large *f, int hostorder,
1070 extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t,
1071 struct ext2_inode *f, int hostorder);
1074 extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode);
1077 extern int ext2fs_parse_version_string(const char *ver_string);
1078 extern int ext2fs_get_library_version(const char **ver_string,
1079 const char **date_string);
1081 /* write_bb_file.c */
1082 extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list,
1087 /* inline functions */
1088 extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr);
1089 extern errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr);
1090 extern errcode_t ext2fs_free_mem(void *ptr);
1091 extern errcode_t ext2fs_resize_mem(unsigned long old_size,
1092 unsigned long size, void *ptr);
1093 extern void ext2fs_mark_super_dirty(ext2_filsys fs);
1094 extern void ext2fs_mark_changed(ext2_filsys fs);
1095 extern int ext2fs_test_changed(ext2_filsys fs);
1096 extern void ext2fs_mark_valid(ext2_filsys fs);
1097 extern void ext2fs_unmark_valid(ext2_filsys fs);
1098 extern int ext2fs_test_valid(ext2_filsys fs);
1099 extern void ext2fs_mark_ib_dirty(ext2_filsys fs);
1100 extern void ext2fs_mark_bb_dirty(ext2_filsys fs);
1101 extern int ext2fs_test_ib_dirty(ext2_filsys fs);
1102 extern int ext2fs_test_bb_dirty(ext2_filsys fs);
1103 extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk);
1104 extern int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino);
1105 extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group);
1106 extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group);
1107 extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1108 struct ext2_inode *inode);
1109 extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b);
1112 * The actual inlined functions definitions themselves...
1114 * If NO_INLINE_FUNCS is defined, then we won't try to do inline
1117 #if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS))
1118 #ifdef INCLUDE_INLINE_FUNCS
1119 #define _INLINE_ extern
1122 #define _INLINE_ extern __inline__
1123 #else /* For Watcom C */
1124 #define _INLINE_ extern inline
1128 #ifndef EXT2_CUSTOM_MEMORY_ROUTINES
1133 _INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr)
1139 return EXT2_ET_NO_MEMORY;
1140 memcpy(ptr, &pp, sizeof (pp));
1144 _INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr)
1146 if (count && (-1UL)/count<size)
1147 return EXT2_ET_NO_MEMORY; //maybe define EXT2_ET_OVERFLOW ?
1148 return ext2fs_get_mem(count*size, ptr);
1154 _INLINE_ errcode_t ext2fs_free_mem(void *ptr)
1158 memcpy(&p, ptr, sizeof(p));
1161 memcpy(ptr, &p, sizeof(p));
1168 _INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size,
1169 unsigned long size, void *ptr)
1173 /* Use "memcpy" for pointer assignments here to avoid problems
1174 * with C99 strict type aliasing rules. */
1175 memcpy(&p, ptr, sizeof(p));
1176 p = realloc(p, size);
1178 return EXT2_ET_NO_MEMORY;
1179 memcpy(ptr, &p, sizeof(p));
1182 #endif /* Custom memory routines */
1185 * Mark a filesystem superblock as dirty
1187 _INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs)
1189 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED;
1193 * Mark a filesystem as changed
1195 _INLINE_ void ext2fs_mark_changed(ext2_filsys fs)
1197 fs->flags |= EXT2_FLAG_CHANGED;
1201 * Check to see if a filesystem has changed
1203 _INLINE_ int ext2fs_test_changed(ext2_filsys fs)
1205 return (fs->flags & EXT2_FLAG_CHANGED);
1209 * Mark a filesystem as valid
1211 _INLINE_ void ext2fs_mark_valid(ext2_filsys fs)
1213 fs->flags |= EXT2_FLAG_VALID;
1217 * Mark a filesystem as NOT valid
1219 _INLINE_ void ext2fs_unmark_valid(ext2_filsys fs)
1221 fs->flags &= ~EXT2_FLAG_VALID;
1225 * Check to see if a filesystem is valid
1227 _INLINE_ int ext2fs_test_valid(ext2_filsys fs)
1229 return (fs->flags & EXT2_FLAG_VALID);
1233 * Mark the inode bitmap as dirty
1235 _INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs)
1237 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED;
1241 * Mark the block bitmap as dirty
1243 _INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs)
1245 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED;
1249 * Check to see if a filesystem's inode bitmap is dirty
1251 _INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs)
1253 return (fs->flags & EXT2_FLAG_IB_DIRTY);
1257 * Check to see if a filesystem's block bitmap is dirty
1259 _INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs)
1261 return (fs->flags & EXT2_FLAG_BB_DIRTY);
1265 * Return the group # of a block
1267 _INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk)
1269 return (blk - fs->super->s_first_data_block) /
1270 fs->super->s_blocks_per_group;
1274 * Return the group # of an inode number
1276 _INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino)
1278 return (ino - 1) / fs->super->s_inodes_per_group;
1282 * Return the first block (inclusive) in a group
1284 _INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group)
1286 return fs->super->s_first_data_block +
1287 (group * fs->super->s_blocks_per_group);
1291 * Return the last block (inclusive) in a group
1293 _INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group)
1295 return (group == fs->group_desc_count - 1 ?
1296 fs->super->s_blocks_count - 1 :
1297 ext2fs_group_first_block(fs, group) +
1298 (fs->super->s_blocks_per_group - 1));
1301 _INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs,
1302 struct ext2_inode *inode)
1304 return inode->i_blocks -
1305 (inode->i_file_acl ? fs->blocksize >> 9 : 0);
1309 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b)
1311 _INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b)
1315 return ((a - 1) / b) + 1;
1324 #endif /* _EXT2FS_EXT2FS_H */