ext2fs.h revision 5d38ef1d049bf56d1c1e88b8b4d287c0f9470e61
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 Public 8 * License. 9 * %End-Header% 10 */ 11 12#ifndef _EXT2FS_EXT2FS_H 13#define _EXT2FS_EXT2FS_H 14 15#ifdef __GNUC__ 16#define EXT2FS_ATTR(x) __attribute__(x) 17#else 18#define EXT2FS_ATTR(x) 19#endif 20 21#ifdef __cplusplus 22extern "C" { 23#endif 24 25/* 26 * Non-GNU C compilers won't necessarily understand inline 27 */ 28#if (!defined(__GNUC__) && !defined(__WATCOMC__)) 29#define NO_INLINE_FUNCS 30#endif 31 32/* 33 * Where the master copy of the superblock is located, and how big 34 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because 35 * the size of the superblock structure is not necessarily trustworthy 36 * (some versions have the padding set up so that the superblock is 37 * 1032 bytes long). 38 */ 39#define SUPERBLOCK_OFFSET 1024 40#define SUPERBLOCK_SIZE 1024 41 42/* 43 * The last ext2fs revision level that this version of the library is 44 * able to support. 45 */ 46#define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV 47 48#ifdef HAVE_SYS_TYPES_H 49#include <sys/types.h> 50#endif 51 52#include <stdio.h> 53#include <stdlib.h> 54#include <string.h> 55 56#if EXT2_FLAT_INCLUDES 57#include "e2_types.h" 58#include "ext2_fs.h" 59#include "ext3_extents.h" 60#else 61#include <ext2fs/ext2_types.h> 62#include <ext2fs/ext2_fs.h> 63#include <ext2fs/ext3_extents.h> 64#endif /* EXT2_FLAT_INCLUDES */ 65 66typedef __u32 ext2_ino_t; 67typedef __u32 blk_t; 68typedef __u64 blk64_t; 69typedef __u32 dgrp_t; 70typedef __u32 ext2_off_t; 71typedef __s64 e2_blkcnt_t; 72typedef __u32 ext2_dirhash_t; 73 74#if EXT2_FLAT_INCLUDES 75#include "com_err.h" 76#include "ext2_io.h" 77#include "ext2_err.h" 78#else 79#include <et/com_err.h> 80#include <ext2fs/ext2_io.h> 81#include <ext2fs/ext2_err.h> 82#endif 83 84/* 85 * Portability help for Microsoft Visual C++ 86 */ 87#ifdef _MSC_VER 88#define EXT2_QSORT_TYPE int __cdecl 89#else 90#define EXT2_QSORT_TYPE int 91#endif 92 93typedef struct struct_ext2_filsys *ext2_filsys; 94 95#define EXT2FS_MARK_ERROR 0 96#define EXT2FS_UNMARK_ERROR 1 97#define EXT2FS_TEST_ERROR 2 98 99typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap; 100typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap; 101typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap; 102 103#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s) 104 105 106/* 107 * Badblocks list definitions 108 */ 109 110typedef struct ext2_struct_u32_list *ext2_badblocks_list; 111typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate; 112 113typedef struct ext2_struct_u32_list *ext2_u32_list; 114typedef struct ext2_struct_u32_iterate *ext2_u32_iterate; 115 116/* old */ 117typedef struct ext2_struct_u32_list *badblocks_list; 118typedef struct ext2_struct_u32_iterate *badblocks_iterate; 119 120#define BADBLOCKS_FLAG_DIRTY 1 121 122/* 123 * ext2_dblist structure and abstractions (see dblist.c) 124 */ 125struct ext2_db_entry { 126 ext2_ino_t ino; 127 blk_t blk; 128 int blockcnt; 129}; 130 131typedef struct ext2_struct_dblist *ext2_dblist; 132 133#define DBLIST_ABORT 1 134 135/* 136 * ext2_fileio definitions 137 */ 138 139#define EXT2_FILE_WRITE 0x0001 140#define EXT2_FILE_CREATE 0x0002 141 142#define EXT2_FILE_MASK 0x00FF 143 144#define EXT2_FILE_BUF_DIRTY 0x4000 145#define EXT2_FILE_BUF_VALID 0x2000 146 147typedef struct ext2_file *ext2_file_t; 148 149#define EXT2_SEEK_SET 0 150#define EXT2_SEEK_CUR 1 151#define EXT2_SEEK_END 2 152 153/* 154 * Flags for the ext2_filsys structure and for ext2fs_open() 155 */ 156#define EXT2_FLAG_RW 0x01 157#define EXT2_FLAG_CHANGED 0x02 158#define EXT2_FLAG_DIRTY 0x04 159#define EXT2_FLAG_VALID 0x08 160#define EXT2_FLAG_IB_DIRTY 0x10 161#define EXT2_FLAG_BB_DIRTY 0x20 162#define EXT2_FLAG_SWAP_BYTES 0x40 163#define EXT2_FLAG_SWAP_BYTES_READ 0x80 164#define EXT2_FLAG_SWAP_BYTES_WRITE 0x100 165#define EXT2_FLAG_MASTER_SB_ONLY 0x200 166#define EXT2_FLAG_FORCE 0x400 167#define EXT2_FLAG_SUPER_ONLY 0x800 168#define EXT2_FLAG_JOURNAL_DEV_OK 0x1000 169#define EXT2_FLAG_IMAGE_FILE 0x2000 170#define EXT2_FLAG_EXCLUSIVE 0x4000 171#define EXT2_FLAG_SOFTSUPP_FEATURES 0x8000 172 173/* 174 * Special flag in the ext2 inode i_flag field that means that this is 175 * a new inode. (So that ext2_write_inode() can clear extra fields.) 176 */ 177#define EXT2_NEW_INODE_FL 0x80000000 178 179/* 180 * Flags for mkjournal 181 * 182 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock 183 */ 184#define EXT2_MKJOURNAL_V1_SUPER 0x0000001 185 186struct struct_ext2_filsys { 187 errcode_t magic; 188 io_channel io; 189 int flags; 190 char * device_name; 191 struct ext2_super_block * super; 192 unsigned int blocksize; 193 int fragsize; 194 dgrp_t group_desc_count; 195 unsigned long desc_blocks; 196 struct ext2_group_desc * group_desc; 197 int inode_blocks_per_group; 198 ext2fs_inode_bitmap inode_map; 199 ext2fs_block_bitmap block_map; 200 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 201 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino); 202 errcode_t (*write_bitmaps)(ext2_filsys fs); 203 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino, 204 struct ext2_inode *inode); 205 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino, 206 struct ext2_inode *inode); 207 ext2_badblocks_list badblocks; 208 ext2_dblist dblist; 209 __u32 stride; /* for mke2fs */ 210 struct ext2_super_block * orig_super; 211 struct ext2_image_hdr * image_header; 212 __u32 umask; 213 time_t now; 214 /* 215 * Reserved for future expansion 216 */ 217 __u32 reserved[7]; 218 219 /* 220 * Reserved for the use of the calling application. 221 */ 222 void * priv_data; 223 224 /* 225 * Inode cache 226 */ 227 struct ext2_inode_cache *icache; 228 io_channel image_io; 229}; 230 231#if EXT2_FLAT_INCLUDES 232#include "e2_bitops.h" 233#else 234#include <ext2fs/bitops.h> 235#endif 236 237/* 238 * Return flags for the block iterator functions 239 */ 240#define BLOCK_CHANGED 1 241#define BLOCK_ABORT 2 242#define BLOCK_ERROR 4 243 244/* 245 * Block interate flags 246 * 247 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 248 * function should be called on blocks where the block number is zero. 249 * This is used by ext2fs_expand_dir() to be able to add a new block 250 * to an inode. It can also be used for programs that want to be able 251 * to deal with files that contain "holes". 252 * 253 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for 254 * the indirect, doubly indirect, etc. blocks should be called after 255 * all of the blocks containined in the indirect blocks are processed. 256 * This is useful if you are going to be deallocating blocks from an 257 * inode. 258 * 259 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 260 * called for data blocks only. 261 * 262 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 263 * ext2fs_block_iterate2 that large files won't be accepted. 264 */ 265#define BLOCK_FLAG_APPEND 1 266#define BLOCK_FLAG_HOLE 1 267#define BLOCK_FLAG_DEPTH_TRAVERSE 2 268#define BLOCK_FLAG_DATA_ONLY 4 269 270#define BLOCK_FLAG_NO_LARGE 0x1000 271 272/* 273 * Magic "block count" return values for the block iterator function. 274 */ 275#define BLOCK_COUNT_IND (-1) 276#define BLOCK_COUNT_DIND (-2) 277#define BLOCK_COUNT_TIND (-3) 278#define BLOCK_COUNT_TRANSLATOR (-4) 279 280#if 0 281/* 282 * Flags for ext2fs_move_blocks 283 */ 284#define EXT2_BMOVE_GET_DBLIST 0x0001 285#define EXT2_BMOVE_DEBUG 0x0002 286#endif 287 288/* 289 * Flags for directory block reading and writing functions 290 */ 291#define EXT2_DIRBLOCK_V2_STRUCT 0x0001 292 293/* 294 * Return flags for the directory iterator functions 295 */ 296#define DIRENT_CHANGED 1 297#define DIRENT_ABORT 2 298#define DIRENT_ERROR 3 299 300/* 301 * Directory iterator flags 302 */ 303 304#define DIRENT_FLAG_INCLUDE_EMPTY 1 305#define DIRENT_FLAG_INCLUDE_REMOVED 2 306 307#define DIRENT_DOT_FILE 1 308#define DIRENT_DOT_DOT_FILE 2 309#define DIRENT_OTHER_FILE 3 310#define DIRENT_DELETED_FILE 4 311 312/* 313 * Inode scan definitions 314 */ 315typedef struct ext2_struct_inode_scan *ext2_inode_scan; 316 317/* 318 * ext2fs_scan flags 319 */ 320#define EXT2_SF_CHK_BADBLOCKS 0x0001 321#define EXT2_SF_BAD_INODE_BLK 0x0002 322#define EXT2_SF_BAD_EXTRA_BYTES 0x0004 323#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 324#define EXT2_SF_DO_LAZY 0x0010 325 326/* 327 * ext2fs_check_if_mounted flags 328 */ 329#define EXT2_MF_MOUNTED 1 330#define EXT2_MF_ISROOT 2 331#define EXT2_MF_READONLY 4 332#define EXT2_MF_SWAP 8 333#define EXT2_MF_BUSY 16 334 335/* 336 * Ext2/linux mode flags. We define them here so that we don't need 337 * to depend on the OS's sys/stat.h, since we may be compiling on a 338 * non-Linux system. 339 */ 340#define LINUX_S_IFMT 00170000 341#define LINUX_S_IFSOCK 0140000 342#define LINUX_S_IFLNK 0120000 343#define LINUX_S_IFREG 0100000 344#define LINUX_S_IFBLK 0060000 345#define LINUX_S_IFDIR 0040000 346#define LINUX_S_IFCHR 0020000 347#define LINUX_S_IFIFO 0010000 348#define LINUX_S_ISUID 0004000 349#define LINUX_S_ISGID 0002000 350#define LINUX_S_ISVTX 0001000 351 352#define LINUX_S_IRWXU 00700 353#define LINUX_S_IRUSR 00400 354#define LINUX_S_IWUSR 00200 355#define LINUX_S_IXUSR 00100 356 357#define LINUX_S_IRWXG 00070 358#define LINUX_S_IRGRP 00040 359#define LINUX_S_IWGRP 00020 360#define LINUX_S_IXGRP 00010 361 362#define LINUX_S_IRWXO 00007 363#define LINUX_S_IROTH 00004 364#define LINUX_S_IWOTH 00002 365#define LINUX_S_IXOTH 00001 366 367#define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 368#define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 369#define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 370#define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 371#define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 372#define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 373#define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 374 375/* 376 * ext2 size of an inode 377 */ 378#define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32)) 379 380/* 381 * ext2_icount_t abstraction 382 */ 383#define EXT2_ICOUNT_OPT_INCREMENT 0x01 384 385typedef struct ext2_icount *ext2_icount_t; 386 387/* 388 * Flags for ext2fs_bmap 389 */ 390#define BMAP_ALLOC 0x0001 391#define BMAP_SET 0x0002 392 393/* 394 * Flags for imager.c functions 395 */ 396#define IMAGER_FLAG_INODEMAP 1 397#define IMAGER_FLAG_SPARSEWRITE 2 398 399/* 400 * For checking structure magic numbers... 401 */ 402 403#define EXT2_CHECK_MAGIC(struct, code) \ 404 if ((struct)->magic != (code)) return (code) 405 406 407/* 408 * For ext2 compression support 409 */ 410#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) -1) 411#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR) 412 413/* 414 * Features supported by this version of the library 415 */ 416#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 417 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 418 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\ 419 EXT2_FEATURE_COMPAT_RESIZE_INODE|\ 420 EXT2_FEATURE_COMPAT_DIR_INDEX|\ 421 EXT2_FEATURE_COMPAT_LAZY_BG|\ 422 EXT2_FEATURE_COMPAT_EXT_ATTR) 423 424/* This #ifdef is temporary until compression is fully supported */ 425#ifdef ENABLE_COMPRESSION 426#ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL 427/* If the below warning bugs you, then have 428 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your 429 environment at configure time. */ 430 #warning "Compression support is experimental" 431#endif 432#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 433 EXT2_FEATURE_INCOMPAT_COMPRESSION|\ 434 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 435 EXT2_FEATURE_INCOMPAT_META_BG|\ 436 EXT3_FEATURE_INCOMPAT_RECOVER) 437#else 438#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 439 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 440 EXT2_FEATURE_INCOMPAT_META_BG|\ 441 EXT3_FEATURE_INCOMPAT_RECOVER) 442#endif 443#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 444 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) 445 446/* 447 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed 448 * to ext2fs_openfs() 449 */ 450#define EXT2_LIB_SOFTSUPP_INCOMPAT (EXT3_FEATURE_INCOMPAT_EXTENTS) 451#define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\ 452 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\ 453 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\ 454 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE) 455 456/* 457 * function prototypes 458 */ 459 460/* alloc.c */ 461extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode, 462 ext2fs_inode_bitmap map, ext2_ino_t *ret); 463extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 464 ext2fs_block_bitmap map, blk_t *ret); 465extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 466 blk_t finish, int num, 467 ext2fs_block_bitmap map, 468 blk_t *ret); 469extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 470 char *block_buf, blk_t *ret); 471 472/* alloc_sb.c */ 473extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs, 474 dgrp_t group, 475 ext2fs_block_bitmap bmap); 476 477/* alloc_stats.c */ 478void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse); 479void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino, 480 int inuse, int isdir); 481void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse); 482 483/* alloc_tables.c */ 484extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 485extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 486 ext2fs_block_bitmap bmap); 487 488/* badblocks.c */ 489extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size); 490extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk); 491extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk); 492extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk); 493extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb, 494 ext2_u32_iterate *ret); 495extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk); 496extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter); 497extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest); 498extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2); 499 500extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 501 int size); 502extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 503 blk_t blk); 504extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 505 blk_t blk); 506extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk); 507extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk); 508extern errcode_t 509 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 510 ext2_badblocks_iterate *ret); 511extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 512 blk_t *blk); 513extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 514extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 515 ext2_badblocks_list *dest); 516extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 517 ext2_badblocks_list bb2); 518extern int ext2fs_u32_list_count(ext2_u32_list bb); 519 520/* bb_compat */ 521extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 522extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 523extern int badblocks_list_test(badblocks_list bb, blk_t blk); 524extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 525 badblocks_iterate *ret); 526extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 527extern void badblocks_list_iterate_end(badblocks_iterate iter); 528extern void badblocks_list_free(badblocks_list bb); 529 530/* bb_inode.c */ 531extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 532 ext2_badblocks_list bb_list); 533 534/* bitmaps.c */ 535extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 536extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 537extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 538 ext2fs_generic_bitmap *dest); 539extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 540extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 541extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 542extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 543extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 544 const char *descr, 545 ext2fs_block_bitmap *ret); 546extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 547 const char *descr, 548 ext2fs_inode_bitmap *ret); 549extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 550 ext2_ino_t end, ext2_ino_t *oend); 551extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 552 blk_t end, blk_t *oend); 553extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 554extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 555extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 556extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 557extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 558 ext2fs_inode_bitmap bmap); 559extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 560 ext2fs_block_bitmap bmap); 561extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 562 ext2fs_block_bitmap bm2); 563extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 564 ext2fs_inode_bitmap bm2); 565extern errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap, 566 ext2_ino_t start, unsigned int num, 567 void *in); 568extern errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap, 569 ext2_ino_t start, unsigned int num, 570 void *out); 571extern errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap, 572 blk_t start, unsigned int num, 573 void *in); 574extern errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap, 575 blk_t start, unsigned int num, 576 void *out); 577 578 579/* block.c */ 580extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 581 ext2_ino_t ino, 582 int flags, 583 char *block_buf, 584 int (*func)(ext2_filsys fs, 585 blk_t *blocknr, 586 int blockcnt, 587 void *priv_data), 588 void *priv_data); 589errcode_t ext2fs_block_iterate2(ext2_filsys fs, 590 ext2_ino_t ino, 591 int flags, 592 char *block_buf, 593 int (*func)(ext2_filsys fs, 594 blk_t *blocknr, 595 e2_blkcnt_t blockcnt, 596 blk_t ref_blk, 597 int ref_offset, 598 void *priv_data), 599 void *priv_data); 600 601/* bmap.c */ 602extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, 603 struct ext2_inode *inode, 604 char *block_buf, int bmap_flags, 605 blk_t block, blk_t *phys_blk); 606 607 608#if 0 609/* bmove.c */ 610extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 611 ext2fs_block_bitmap reserve, 612 ext2fs_block_bitmap alloc_map, 613 int flags); 614#endif 615 616/* check_desc.c */ 617extern errcode_t ext2fs_check_desc(ext2_filsys fs); 618 619/* closefs.c */ 620extern errcode_t ext2fs_close(ext2_filsys fs); 621extern errcode_t ext2fs_flush(ext2_filsys fs); 622extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block); 623extern int ext2fs_super_and_bgd_loc(ext2_filsys fs, 624 dgrp_t group, 625 blk_t *ret_super_blk, 626 blk_t *ret_old_desc_blk, 627 blk_t *ret_new_desc_blk, 628 int *ret_meta_bg); 629extern void ext2fs_update_dynamic_rev(ext2_filsys fs); 630 631/* dblist.c */ 632 633extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs); 634extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 635extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino, 636 blk_t blk, int blockcnt); 637extern void ext2fs_dblist_sort(ext2_dblist dblist, 638 EXT2_QSORT_TYPE (*sortfunc)(const void *, 639 const void *)); 640extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 641 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 642 void *priv_data), 643 void *priv_data); 644extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino, 645 blk_t blk, int blockcnt); 646extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 647 ext2_dblist *dest); 648extern int ext2fs_dblist_count(ext2_dblist dblist); 649 650/* dblist_dir.c */ 651extern errcode_t 652 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 653 int flags, 654 char *block_buf, 655 int (*func)(ext2_ino_t dir, 656 int entry, 657 struct ext2_dir_entry *dirent, 658 int offset, 659 int blocksize, 660 char *buf, 661 void *priv_data), 662 void *priv_data); 663 664/* dirblock.c */ 665extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 666 void *buf); 667extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block, 668 void *buf, int flags); 669extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 670 void *buf); 671extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block, 672 void *buf, int flags); 673 674/* dirhash.c */ 675extern errcode_t ext2fs_dirhash(int version, const char *name, int len, 676 const __u32 *seed, 677 ext2_dirhash_t *ret_hash, 678 ext2_dirhash_t *ret_minor_hash); 679 680 681/* dir_iterate.c */ 682extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 683 ext2_ino_t dir, 684 int flags, 685 char *block_buf, 686 int (*func)(struct ext2_dir_entry *dirent, 687 int offset, 688 int blocksize, 689 char *buf, 690 void *priv_data), 691 void *priv_data); 692extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs, 693 ext2_ino_t dir, 694 int flags, 695 char *block_buf, 696 int (*func)(ext2_ino_t dir, 697 int entry, 698 struct ext2_dir_entry *dirent, 699 int offset, 700 int blocksize, 701 char *buf, 702 void *priv_data), 703 void *priv_data); 704 705/* dupfs.c */ 706extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 707 708/* expanddir.c */ 709extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir); 710 711/* ext_attr.c */ 712extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf); 713extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, 714 void *buf); 715extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk, 716 char *block_buf, 717 int adjust, __u32 *newcount); 718 719/* fileio.c */ 720extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino, 721 struct ext2_inode *inode, 722 int flags, ext2_file_t *ret); 723extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino, 724 int flags, ext2_file_t *ret); 725extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 726extern errcode_t ext2fs_file_close(ext2_file_t file); 727extern errcode_t ext2fs_file_flush(ext2_file_t file); 728extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 729 unsigned int wanted, unsigned int *got); 730extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf, 731 unsigned int nbytes, unsigned int *written); 732extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset, 733 int whence, __u64 *ret_pos); 734extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 735 int whence, ext2_off_t *ret_pos); 736errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size); 737extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 738extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 739 740/* finddev.c */ 741extern char *ext2fs_find_block_device(dev_t device); 742 743/* flushb.c */ 744extern errcode_t ext2fs_sync_device(int fd, int flushb); 745 746/* freefs.c */ 747extern void ext2fs_free(ext2_filsys fs); 748extern void ext2fs_free_dblist(ext2_dblist dblist); 749extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb); 750extern void ext2fs_u32_list_free(ext2_u32_list bb); 751 752/* gen_bitmap.c */ 753extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 754extern errcode_t ext2fs_make_generic_bitmap(errcode_t magic, ext2_filsys fs, 755 __u32 start, __u32 end, 756 __u32 real_end, 757 const char *descr, char *init_map, 758 ext2fs_generic_bitmap *ret); 759extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 760 __u32 end, 761 __u32 real_end, 762 const char *descr, 763 ext2fs_generic_bitmap *ret); 764extern errcode_t ext2fs_copy_generic_bitmap(ext2fs_generic_bitmap src, 765 ext2fs_generic_bitmap *dest); 766extern void ext2fs_clear_generic_bitmap(ext2fs_generic_bitmap bitmap); 767extern errcode_t ext2fs_fudge_generic_bitmap_end(ext2fs_inode_bitmap bitmap, 768 errcode_t magic, 769 errcode_t neq, 770 ext2_ino_t end, 771 ext2_ino_t *oend); 772extern void ext2fs_set_generic_bitmap_padding(ext2fs_generic_bitmap map); 773extern errcode_t ext2fs_resize_generic_bitmap(errcode_t magic, 774 __u32 new_end, 775 __u32 new_real_end, 776 ext2fs_generic_bitmap bmap); 777extern errcode_t ext2fs_compare_generic_bitmap(errcode_t magic, errcode_t neq, 778 ext2fs_generic_bitmap bm1, 779 ext2fs_generic_bitmap bm2); 780extern errcode_t ext2fs_get_generic_bitmap_range(ext2fs_generic_bitmap bmap, 781 errcode_t magic, 782 __u32 start, __u32 num, 783 void *out); 784extern errcode_t ext2fs_set_generic_bitmap_range(ext2fs_generic_bitmap bmap, 785 errcode_t magic, 786 __u32 start, __u32 num, 787 void *in); 788 789/* getsize.c */ 790extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 791 blk_t *retblocks); 792 793/* getsectsize.c */ 794errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize); 795 796/* imager.c */ 797extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags); 798extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags); 799extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags); 800extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags); 801extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags); 802extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags); 803 804/* ind_block.c */ 805errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf); 806errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf); 807 808/* initialize.c */ 809extern errcode_t ext2fs_initialize(const char *name, int flags, 810 struct ext2_super_block *param, 811 io_manager manager, ext2_filsys *ret_fs); 812 813/* icount.c */ 814extern void ext2fs_free_icount(ext2_icount_t icount); 815extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir, 816 int flags, ext2_icount_t *ret); 817extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, 818 unsigned int size, 819 ext2_icount_t hint, ext2_icount_t *ret); 820extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, 821 unsigned int size, 822 ext2_icount_t *ret); 823extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino, 824 __u16 *ret); 825extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino, 826 __u16 *ret); 827extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino, 828 __u16 *ret); 829extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino, 830 __u16 count); 831extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount); 832errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 833 834/* inode.c */ 835extern errcode_t ext2fs_flush_icache(ext2_filsys fs); 836extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan, 837 ext2_ino_t *ino, 838 struct ext2_inode *inode, 839 int bufsize); 840extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 841 ext2_inode_scan *ret_scan); 842extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 843extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino, 844 struct ext2_inode *inode); 845extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 846 int group); 847extern void ext2fs_set_inode_callback 848 (ext2_inode_scan scan, 849 errcode_t (*done_group)(ext2_filsys fs, 850 ext2_inode_scan scan, 851 dgrp_t group, 852 void * priv_data), 853 void *done_group_data); 854extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 855 int clear_flags); 856extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino, 857 struct ext2_inode * inode, 858 int bufsize); 859extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino, 860 struct ext2_inode * inode); 861extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino, 862 struct ext2_inode * inode, 863 int bufsize); 864extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino, 865 struct ext2_inode * inode); 866extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino, 867 struct ext2_inode * inode); 868extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 869extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino); 870 871/* inode_io.c */ 872extern io_manager inode_io_manager; 873extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino, 874 char **name); 875extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino, 876 struct ext2_inode *inode, 877 char **name); 878 879/* ismounted.c */ 880extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 881extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags, 882 char *mtpt, int mtlen); 883 884/* namei.c */ 885extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, 886 int namelen, char *buf, ext2_ino_t *inode); 887extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 888 const char *name, ext2_ino_t *inode); 889errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 890 const char *name, ext2_ino_t *inode); 891extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 892 ext2_ino_t inode, ext2_ino_t *res_inode); 893 894/* native.c */ 895int ext2fs_native_flag(void); 896 897/* newdir.c */ 898extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, 899 ext2_ino_t parent_ino, char **block); 900 901/* mkdir.c */ 902extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, 903 const char *name); 904 905/* mkjournal.c */ 906extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs, 907 __u32 size, int flags, 908 char **ret_jsb); 909extern errcode_t ext2fs_add_journal_device(ext2_filsys fs, 910 ext2_filsys journal_dev); 911extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, 912 int flags); 913extern int ext2fs_default_journal_size(__u64 blocks); 914 915/* openfs.c */ 916extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 917 unsigned int block_size, io_manager manager, 918 ext2_filsys *ret_fs); 919extern errcode_t ext2fs_open2(const char *name, const char *io_options, 920 int flags, int superblock, 921 unsigned int block_size, io_manager manager, 922 ext2_filsys *ret_fs); 923extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, 924 dgrp_t i); 925errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io); 926errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io); 927errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io); 928 929/* get_pathname.c */ 930extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino, 931 char **name); 932 933/* link.c */ 934errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name, 935 ext2_ino_t ino, int flags); 936errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name, 937 ext2_ino_t ino, int flags); 938 939/* read_bb.c */ 940extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 941 ext2_badblocks_list *bb_list); 942 943/* read_bb_file.c */ 944extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 945 ext2_badblocks_list *bb_list, 946 void *priv_data, 947 void (*invalid)(ext2_filsys fs, 948 blk_t blk, 949 char *badstr, 950 void *priv_data)); 951extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 952 ext2_badblocks_list *bb_list, 953 void (*invalid)(ext2_filsys fs, 954 blk_t blk)); 955 956/* res_gdt.c */ 957extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs); 958 959/* swapfs.c */ 960extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize, 961 int has_header); 962extern void ext2fs_swap_super(struct ext2_super_block * super); 963extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 964extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t, 965 struct ext2_inode_large *f, int hostorder, 966 int bufsize); 967extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 968 struct ext2_inode *f, int hostorder); 969 970/* valid_blk.c */ 971extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 972 973/* version.c */ 974extern int ext2fs_parse_version_string(const char *ver_string); 975extern int ext2fs_get_library_version(const char **ver_string, 976 const char **date_string); 977 978/* write_bb_file.c */ 979extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list, 980 unsigned int flags, 981 FILE *f); 982 983 984/* inline functions */ 985extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr); 986extern errcode_t ext2fs_free_mem(void *ptr); 987extern errcode_t ext2fs_resize_mem(unsigned long old_size, 988 unsigned long size, void *ptr); 989extern void ext2fs_mark_super_dirty(ext2_filsys fs); 990extern void ext2fs_mark_changed(ext2_filsys fs); 991extern int ext2fs_test_changed(ext2_filsys fs); 992extern void ext2fs_mark_valid(ext2_filsys fs); 993extern void ext2fs_unmark_valid(ext2_filsys fs); 994extern int ext2fs_test_valid(ext2_filsys fs); 995extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 996extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 997extern int ext2fs_test_ib_dirty(ext2_filsys fs); 998extern int ext2fs_test_bb_dirty(ext2_filsys fs); 999extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 1000extern int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino); 1001extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group); 1002extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group); 1003extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 1004 struct ext2_inode *inode); 1005extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b); 1006 1007/* 1008 * The actual inlined functions definitions themselves... 1009 * 1010 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 1011 * functions at all! 1012 */ 1013#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 1014#ifdef INCLUDE_INLINE_FUNCS 1015#define _INLINE_ extern 1016#else 1017#ifdef __GNUC__ 1018#define _INLINE_ extern __inline__ 1019#else /* For Watcom C */ 1020#define _INLINE_ extern inline 1021#endif 1022#endif 1023 1024#ifndef EXT2_CUSTOM_MEMORY_ROUTINES 1025#include <string.h> 1026/* 1027 * Allocate memory 1028 */ 1029_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr) 1030{ 1031 void *pp; 1032 1033 pp = malloc(size); 1034 if (!pp) 1035 return EXT2_ET_NO_MEMORY; 1036 memcpy(ptr, &pp, sizeof (pp)); 1037 return 0; 1038} 1039 1040/* 1041 * Free memory 1042 */ 1043_INLINE_ errcode_t ext2fs_free_mem(void *ptr) 1044{ 1045 void *p; 1046 1047 memcpy(&p, ptr, sizeof(p)); 1048 free(p); 1049 p = 0; 1050 memcpy(ptr, &p, sizeof(p)); 1051 return 0; 1052} 1053 1054/* 1055 * Resize memory 1056 */ 1057_INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size, 1058 unsigned long size, void *ptr) 1059{ 1060 void *p; 1061 1062 /* Use "memcpy" for pointer assignments here to avoid problems 1063 * with C99 strict type aliasing rules. */ 1064 memcpy(&p, ptr, sizeof(p)); 1065 p = realloc(p, size); 1066 if (!p) 1067 return EXT2_ET_NO_MEMORY; 1068 memcpy(ptr, &p, sizeof(p)); 1069 return 0; 1070} 1071#endif /* Custom memory routines */ 1072 1073/* 1074 * Mark a filesystem superblock as dirty 1075 */ 1076_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 1077{ 1078 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 1079} 1080 1081/* 1082 * Mark a filesystem as changed 1083 */ 1084_INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 1085{ 1086 fs->flags |= EXT2_FLAG_CHANGED; 1087} 1088 1089/* 1090 * Check to see if a filesystem has changed 1091 */ 1092_INLINE_ int ext2fs_test_changed(ext2_filsys fs) 1093{ 1094 return (fs->flags & EXT2_FLAG_CHANGED); 1095} 1096 1097/* 1098 * Mark a filesystem as valid 1099 */ 1100_INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 1101{ 1102 fs->flags |= EXT2_FLAG_VALID; 1103} 1104 1105/* 1106 * Mark a filesystem as NOT valid 1107 */ 1108_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 1109{ 1110 fs->flags &= ~EXT2_FLAG_VALID; 1111} 1112 1113/* 1114 * Check to see if a filesystem is valid 1115 */ 1116_INLINE_ int ext2fs_test_valid(ext2_filsys fs) 1117{ 1118 return (fs->flags & EXT2_FLAG_VALID); 1119} 1120 1121/* 1122 * Mark the inode bitmap as dirty 1123 */ 1124_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 1125{ 1126 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 1127} 1128 1129/* 1130 * Mark the block bitmap as dirty 1131 */ 1132_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 1133{ 1134 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 1135} 1136 1137/* 1138 * Check to see if a filesystem's inode bitmap is dirty 1139 */ 1140_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 1141{ 1142 return (fs->flags & EXT2_FLAG_IB_DIRTY); 1143} 1144 1145/* 1146 * Check to see if a filesystem's block bitmap is dirty 1147 */ 1148_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 1149{ 1150 return (fs->flags & EXT2_FLAG_BB_DIRTY); 1151} 1152 1153/* 1154 * Return the group # of a block 1155 */ 1156_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 1157{ 1158 return (blk - fs->super->s_first_data_block) / 1159 fs->super->s_blocks_per_group; 1160} 1161 1162/* 1163 * Return the group # of an inode number 1164 */ 1165_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino) 1166{ 1167 return (ino - 1) / fs->super->s_inodes_per_group; 1168} 1169 1170/* 1171 * Return the first block (inclusive) in a group 1172 */ 1173_INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group) 1174{ 1175 return fs->super->s_first_data_block + 1176 (group * fs->super->s_blocks_per_group); 1177} 1178 1179/* 1180 * Return the last block (inclusive) in a group 1181 */ 1182_INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group) 1183{ 1184 return (group == fs->group_desc_count - 1 ? 1185 fs->super->s_blocks_count - 1 : 1186 ext2fs_group_first_block(fs, group) + 1187 (fs->super->s_blocks_per_group - 1)); 1188} 1189 1190_INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 1191 struct ext2_inode *inode) 1192{ 1193 return inode->i_blocks - 1194 (inode->i_file_acl ? fs->blocksize >> 9 : 0); 1195} 1196 1197/* 1198 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b) 1199 */ 1200_INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b) 1201{ 1202 if (!a) 1203 return 0; 1204 return ((a - 1) / b) + 1; 1205} 1206#undef _INLINE_ 1207#endif 1208 1209#ifdef __cplusplus 1210} 1211#endif 1212 1213#endif /* _EXT2FS_EXT2FS_H */ 1214