ext2fs.h revision 2e8ca9a26b0bd7dae546a3f9a98df67b043fe3be
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 * Build in support for byte-swapping filesystems if we the feature 34 * has been configured or if we're being built on a CPU architecture 35 * with a non-native byte order. 36 */ 37#if defined(ENABLE_SWAPFS) || defined(WORDS_BIGENDIAN) 38#define EXT2FS_ENABLE_SWAPFS 39#endif 40 41/* 42 * Where the master copy of the superblock is located, and how big 43 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because 44 * the size of the superblock structure is not necessarily trustworthy 45 * (some versions have the padding set up so that the superblock is 46 * 1032 bytes long). 47 */ 48#define SUPERBLOCK_OFFSET 1024 49#define SUPERBLOCK_SIZE 1024 50 51/* 52 * The last ext2fs revision level that this version of the library is 53 * able to support. 54 */ 55#define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV 56 57#ifdef HAVE_SYS_TYPES_H 58#include <sys/types.h> 59#endif 60 61#include <stdio.h> 62#include <stdlib.h> 63 64#if EXT2_FLAT_INCLUDES 65#include "e2_types.h" 66#include "ext2_fs.h" 67#else 68#include <ext2fs/ext2_types.h> 69#include <ext2fs/ext2_fs.h> 70#endif /* EXT2_FLAT_INCLUDES */ 71 72typedef __u32 ext2_ino_t; 73typedef __u32 blk_t; 74typedef __u32 dgrp_t; 75typedef __u32 ext2_off_t; 76typedef __s64 e2_blkcnt_t; 77typedef __u32 ext2_dirhash_t; 78 79#if EXT2_FLAT_INCLUDES 80#include "com_err.h" 81#include "ext2_io.h" 82#include "ext2_err.h" 83#else 84#include <et/com_err.h> 85#include <ext2fs/ext2_io.h> 86#include <ext2fs/ext2_err.h> 87#endif 88 89/* 90 * Portability help for Microsoft Visual C++ 91 */ 92#ifdef _MSC_VER 93#define EXT2_QSORT_TYPE int __cdecl 94#else 95#define EXT2_QSORT_TYPE int 96#endif 97 98typedef struct struct_ext2_filsys *ext2_filsys; 99 100struct ext2fs_struct_generic_bitmap { 101 errcode_t magic; 102 ext2_filsys fs; 103 __u32 start, end; 104 __u32 real_end; 105 char * description; 106 char * bitmap; 107 errcode_t base_error_code; 108 __u32 reserved[7]; 109}; 110 111#define EXT2FS_MARK_ERROR 0 112#define EXT2FS_UNMARK_ERROR 1 113#define EXT2FS_TEST_ERROR 2 114 115typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap; 116typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap; 117typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap; 118 119#ifdef EXT2_DYNAMIC_REV 120#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s) 121#else 122#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO 123#define EXT2_INODE_SIZE(s) sizeof(struct ext2_inode) 124#endif 125 126/* 127 * badblocks list definitions 128 */ 129 130typedef struct ext2_struct_u32_list *ext2_badblocks_list; 131typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate; 132 133typedef struct ext2_struct_u32_list *ext2_u32_list; 134typedef struct ext2_struct_u32_iterate *ext2_u32_iterate; 135 136/* old */ 137typedef struct ext2_struct_u32_list *badblocks_list; 138typedef 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 */ 145struct ext2_db_entry { 146 ext2_ino_t ino; 147 blk_t blk; 148 int blockcnt; 149}; 150 151typedef struct ext2_struct_dblist *ext2_dblist; 152 153#define DBLIST_ABORT 1 154 155/* 156 * ext2_fileio definitions 157 */ 158 159#define EXT2_FILE_WRITE 0x0001 160#define EXT2_FILE_CREATE 0x0002 161 162#define EXT2_FILE_MASK 0x00FF 163 164#define EXT2_FILE_BUF_DIRTY 0x4000 165#define EXT2_FILE_BUF_VALID 0x2000 166 167typedef struct ext2_file *ext2_file_t; 168 169#define EXT2_SEEK_SET 0 170#define EXT2_SEEK_CUR 1 171#define EXT2_SEEK_END 2 172 173/* 174 * Flags for the ext2_filsys structure and for ext2fs_open() 175 */ 176#define EXT2_FLAG_RW 0x01 177#define EXT2_FLAG_CHANGED 0x02 178#define EXT2_FLAG_DIRTY 0x04 179#define EXT2_FLAG_VALID 0x08 180#define EXT2_FLAG_IB_DIRTY 0x10 181#define EXT2_FLAG_BB_DIRTY 0x20 182#define EXT2_FLAG_SWAP_BYTES 0x40 183#define EXT2_FLAG_SWAP_BYTES_READ 0x80 184#define EXT2_FLAG_SWAP_BYTES_WRITE 0x100 185#define EXT2_FLAG_MASTER_SB_ONLY 0x200 186#define EXT2_FLAG_FORCE 0x400 187#define EXT2_FLAG_SUPER_ONLY 0x800 188#define EXT2_FLAG_JOURNAL_DEV_OK 0x1000 189#define EXT2_FLAG_IMAGE_FILE 0x2000 190 191/* 192 * Special flag in the ext2 inode i_flag field that means that this is 193 * a new inode. (So that ext2_write_inode() can clear extra fields.) 194 */ 195#define EXT2_NEW_INODE_FL 0x80000000 196 197/* 198 * Flags for mkjournal 199 * 200 * EXT2_MKJOURNAL_V1_SUPER Make a (deprecated) V1 journal superblock 201 */ 202#define EXT2_MKJOURNAL_V1_SUPER 0x0000001 203 204struct struct_ext2_filsys { 205 errcode_t magic; 206 io_channel io; 207 int flags; 208 char * device_name; 209 struct ext2_super_block * super; 210 unsigned int blocksize; 211 int fragsize; 212 dgrp_t group_desc_count; 213 unsigned long desc_blocks; 214 struct ext2_group_desc * group_desc; 215 int inode_blocks_per_group; 216 ext2fs_inode_bitmap inode_map; 217 ext2fs_block_bitmap block_map; 218 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 219 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino); 220 errcode_t (*write_bitmaps)(ext2_filsys fs); 221 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino, 222 struct ext2_inode *inode); 223 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino, 224 struct ext2_inode *inode); 225 ext2_badblocks_list badblocks; 226 ext2_dblist dblist; 227 __u32 stride; /* for mke2fs */ 228 struct ext2_super_block * orig_super; 229 struct ext2_image_hdr * image_header; 230 __u32 umask; 231 /* 232 * Reserved for future expansion 233 */ 234 __u32 reserved[8]; 235 236 /* 237 * Reserved for the use of the calling application. 238 */ 239 void * priv_data; 240 241 /* 242 * Inode cache 243 */ 244 struct ext2_inode_cache *icache; 245 io_channel image_io; 246}; 247 248#if EXT2_FLAT_INCLUDES 249#include "e2_bitops.h" 250#else 251#include <ext2fs/bitops.h> 252#endif 253 254/* 255 * Return flags for the block iterator functions 256 */ 257#define BLOCK_CHANGED 1 258#define BLOCK_ABORT 2 259#define BLOCK_ERROR 4 260 261/* 262 * Block interate flags 263 * 264 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 265 * function should be called on blocks where the block number is zero. 266 * This is used by ext2fs_expand_dir() to be able to add a new block 267 * to an inode. It can also be used for programs that want to be able 268 * to deal with files that contain "holes". 269 * 270 * BLOCK_FLAG_TRAVERSE indicates that the iterator function for the 271 * indirect, doubly indirect, etc. blocks should be called after all 272 * of the blocks containined in the indirect blocks are processed. 273 * This is useful if you are going to be deallocating blocks from an 274 * inode. 275 * 276 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 277 * called for data blocks only. 278 * 279 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 280 * ext2fs_block_iterate2 that large files won't be accepted. 281 */ 282#define BLOCK_FLAG_APPEND 1 283#define BLOCK_FLAG_HOLE 1 284#define BLOCK_FLAG_DEPTH_TRAVERSE 2 285#define BLOCK_FLAG_DATA_ONLY 4 286 287#define BLOCK_FLAG_NO_LARGE 0x1000 288 289/* 290 * Magic "block count" return values for the block iterator function. 291 */ 292#define BLOCK_COUNT_IND (-1) 293#define BLOCK_COUNT_DIND (-2) 294#define BLOCK_COUNT_TIND (-3) 295#define BLOCK_COUNT_TRANSLATOR (-4) 296 297#if 0 298/* 299 * Flags for ext2fs_move_blocks 300 */ 301#define EXT2_BMOVE_GET_DBLIST 0x0001 302#define EXT2_BMOVE_DEBUG 0x0002 303#endif 304 305/* 306 * Flags for directory block reading and writing functions 307 */ 308#define EXT2_DIRBLOCK_V2_STRUCT 0x0001 309 310/* 311 * Return flags for the directory iterator functions 312 */ 313#define DIRENT_CHANGED 1 314#define DIRENT_ABORT 2 315#define DIRENT_ERROR 3 316 317/* 318 * Directory iterator flags 319 */ 320 321#define DIRENT_FLAG_INCLUDE_EMPTY 1 322#define DIRENT_FLAG_INCLUDE_REMOVED 2 323 324#define DIRENT_DOT_FILE 1 325#define DIRENT_DOT_DOT_FILE 2 326#define DIRENT_OTHER_FILE 3 327#define DIRENT_DELETED_FILE 4 328 329/* 330 * Inode scan definitions 331 */ 332typedef struct ext2_struct_inode_scan *ext2_inode_scan; 333 334/* 335 * ext2fs_scan flags 336 */ 337#define EXT2_SF_CHK_BADBLOCKS 0x0001 338#define EXT2_SF_BAD_INODE_BLK 0x0002 339#define EXT2_SF_BAD_EXTRA_BYTES 0x0004 340#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 341 342/* 343 * ext2fs_check_if_mounted flags 344 */ 345#define EXT2_MF_MOUNTED 1 346#define EXT2_MF_ISROOT 2 347#define EXT2_MF_READONLY 4 348#define EXT2_MF_SWAP 8 349 350/* 351 * Ext2/linux mode flags. We define them here so that we don't need 352 * to depend on the OS's sys/stat.h, since we may be compiling on a 353 * non-Linux system. 354 */ 355#define LINUX_S_IFMT 00170000 356#define LINUX_S_IFSOCK 0140000 357#define LINUX_S_IFLNK 0120000 358#define LINUX_S_IFREG 0100000 359#define LINUX_S_IFBLK 0060000 360#define LINUX_S_IFDIR 0040000 361#define LINUX_S_IFCHR 0020000 362#define LINUX_S_IFIFO 0010000 363#define LINUX_S_ISUID 0004000 364#define LINUX_S_ISGID 0002000 365#define LINUX_S_ISVTX 0001000 366 367#define LINUX_S_IRWXU 00700 368#define LINUX_S_IRUSR 00400 369#define LINUX_S_IWUSR 00200 370#define LINUX_S_IXUSR 00100 371 372#define LINUX_S_IRWXG 00070 373#define LINUX_S_IRGRP 00040 374#define LINUX_S_IWGRP 00020 375#define LINUX_S_IXGRP 00010 376 377#define LINUX_S_IRWXO 00007 378#define LINUX_S_IROTH 00004 379#define LINUX_S_IWOTH 00002 380#define LINUX_S_IXOTH 00001 381 382#define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 383#define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 384#define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 385#define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 386#define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 387#define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 388#define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 389 390/* 391 * ext2 size of an inode 392 */ 393#define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32)) 394 395/* 396 * ext2_icount_t abstraction 397 */ 398#define EXT2_ICOUNT_OPT_INCREMENT 0x01 399 400typedef struct ext2_icount *ext2_icount_t; 401 402/* 403 * Flags for ext2fs_bmap 404 */ 405#define BMAP_ALLOC 1 406 407/* 408 * Flags for imager.c functions 409 */ 410#define IMAGER_FLAG_INODEMAP 1 411#define IMAGER_FLAG_SPARSEWRITE 2 412 413/* 414 * For checking structure magic numbers... 415 */ 416 417#define EXT2_CHECK_MAGIC(struct, code) \ 418 if ((struct)->magic != (code)) return (code) 419 420 421/* 422 * For ext2 compression support 423 */ 424#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff) 425#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR) 426 427/* 428 * Features supported by this version of the library 429 */ 430#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 431 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 432 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\ 433 EXT2_FEATURE_COMPAT_DIR_INDEX|\ 434 EXT2_FEATURE_COMPAT_EXT_ATTR) 435 436/* This #ifdef is temporary until compression is fully supported */ 437#ifdef ENABLE_COMPRESSION 438#ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL 439/* If the below warning bugs you, then have 440 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your 441 environment at configure time. */ 442 #warning "Compression support is experimental" 443#endif 444#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 445 EXT2_FEATURE_INCOMPAT_COMPRESSION|\ 446 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 447 EXT2_FEATURE_INCOMPAT_META_BG|\ 448 EXT3_FEATURE_INCOMPAT_RECOVER) 449#else 450#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 451 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 452 EXT2_FEATURE_INCOMPAT_META_BG|\ 453 EXT3_FEATURE_INCOMPAT_RECOVER) 454#endif 455#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 456 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) 457/* 458 * function prototypes 459 */ 460 461/* alloc.c */ 462extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode, 463 ext2fs_inode_bitmap map, ext2_ino_t *ret); 464extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 465 ext2fs_block_bitmap map, blk_t *ret); 466extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 467 blk_t finish, int num, 468 ext2fs_block_bitmap map, 469 blk_t *ret); 470extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 471 char *block_buf, blk_t *ret); 472 473/* alloc_sb.c */ 474extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs, 475 dgrp_t group, 476 ext2fs_block_bitmap bmap); 477 478/* alloc_stats.c */ 479void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse); 480void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino, 481 int inuse, int isdir); 482void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse); 483 484/* alloc_tables.c */ 485extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 486extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 487 ext2fs_block_bitmap bmap); 488 489/* badblocks.c */ 490extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size); 491extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk); 492extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk); 493extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk); 494extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb, 495 ext2_u32_iterate *ret); 496extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk); 497extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter); 498extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest); 499extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2); 500 501extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 502 int size); 503extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 504 blk_t blk); 505extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 506 blk_t blk); 507extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk); 508extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk); 509extern errcode_t 510 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 511 ext2_badblocks_iterate *ret); 512extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 513 blk_t *blk); 514extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 515extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 516 ext2_badblocks_list *dest); 517extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 518 ext2_badblocks_list bb2); 519extern int ext2fs_u32_list_count(ext2_u32_list bb); 520 521/* bb_compat */ 522extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 523extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 524extern int badblocks_list_test(badblocks_list bb, blk_t blk); 525extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 526 badblocks_iterate *ret); 527extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 528extern void badblocks_list_iterate_end(badblocks_iterate iter); 529extern void badblocks_list_free(badblocks_list bb); 530 531/* bb_inode.c */ 532extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 533 ext2_badblocks_list bb_list); 534 535/* bitmaps.c */ 536extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 537extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 538extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 539extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 540extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 541 __u32 end, 542 __u32 real_end, 543 const char *descr, 544 ext2fs_generic_bitmap *ret); 545extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 546 const char *descr, 547 ext2fs_block_bitmap *ret); 548extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 549 const char *descr, 550 ext2fs_inode_bitmap *ret); 551extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 552 ext2_ino_t end, ext2_ino_t *oend); 553extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 554 blk_t end, blk_t *oend); 555extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 556extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 557extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 558extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 559 560/* block.c */ 561extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 562 ext2_ino_t ino, 563 int flags, 564 char *block_buf, 565 int (*func)(ext2_filsys fs, 566 blk_t *blocknr, 567 int blockcnt, 568 void *priv_data), 569 void *priv_data); 570errcode_t ext2fs_block_iterate2(ext2_filsys fs, 571 ext2_ino_t ino, 572 int flags, 573 char *block_buf, 574 int (*func)(ext2_filsys fs, 575 blk_t *blocknr, 576 e2_blkcnt_t blockcnt, 577 blk_t ref_blk, 578 int ref_offset, 579 void *priv_data), 580 void *priv_data); 581 582/* bmap.c */ 583extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, 584 struct ext2_inode *inode, 585 char *block_buf, int bmap_flags, 586 blk_t block, blk_t *phys_blk); 587 588 589#if 0 590/* bmove.c */ 591extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 592 ext2fs_block_bitmap reserve, 593 ext2fs_block_bitmap alloc_map, 594 int flags); 595#endif 596 597/* check_desc.c */ 598extern errcode_t ext2fs_check_desc(ext2_filsys fs); 599 600/* closefs.c */ 601extern errcode_t ext2fs_close(ext2_filsys fs); 602extern errcode_t ext2fs_flush(ext2_filsys fs); 603extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block); 604extern int ext2fs_super_and_bgd_loc(ext2_filsys fs, 605 dgrp_t group, 606 blk_t *ret_super_blk, 607 blk_t *ret_old_desc_blk, 608 blk_t *ret_new_desc_blk, 609 int *ret_meta_bg); 610extern void ext2fs_update_dynamic_rev(ext2_filsys fs); 611 612/* cmp_bitmaps.c */ 613extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 614 ext2fs_block_bitmap bm2); 615extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 616 ext2fs_inode_bitmap bm2); 617 618/* dblist.c */ 619 620extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs); 621extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 622extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino, 623 blk_t blk, int blockcnt); 624extern void ext2fs_dblist_sort(ext2_dblist dblist, 625 EXT2_QSORT_TYPE (*sortfunc)(const void *, 626 const void *)); 627extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 628 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 629 void *priv_data), 630 void *priv_data); 631extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino, 632 blk_t blk, int blockcnt); 633extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 634 ext2_dblist *dest); 635extern int ext2fs_dblist_count(ext2_dblist dblist); 636 637/* dblist_dir.c */ 638extern errcode_t 639 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 640 int flags, 641 char *block_buf, 642 int (*func)(ext2_ino_t dir, 643 int entry, 644 struct ext2_dir_entry *dirent, 645 int offset, 646 int blocksize, 647 char *buf, 648 void *priv_data), 649 void *priv_data); 650 651/* dirblock.c */ 652extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 653 void *buf); 654extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block, 655 void *buf, int flags); 656extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 657 void *buf); 658extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block, 659 void *buf, int flags); 660 661/* dirhash.c */ 662extern errcode_t ext2fs_dirhash(int version, const char *name, int len, 663 const __u32 *seed, 664 ext2_dirhash_t *ret_hash, 665 ext2_dirhash_t *ret_minor_hash); 666 667 668/* dir_iterate.c */ 669extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 670 ext2_ino_t dir, 671 int flags, 672 char *block_buf, 673 int (*func)(struct ext2_dir_entry *dirent, 674 int offset, 675 int blocksize, 676 char *buf, 677 void *priv_data), 678 void *priv_data); 679extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs, 680 ext2_ino_t dir, 681 int flags, 682 char *block_buf, 683 int (*func)(ext2_ino_t dir, 684 int entry, 685 struct ext2_dir_entry *dirent, 686 int offset, 687 int blocksize, 688 char *buf, 689 void *priv_data), 690 void *priv_data); 691 692/* dupfs.c */ 693extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 694 695/* expanddir.c */ 696extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir); 697 698/* ext_attr.c */ 699void ext2fs_swap_ext_attr(ext2_filsys fs, char *to, char *from); 700extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf); 701extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, 702 void *buf); 703extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk, 704 char *block_buf, 705 int adjust, __u32 *newcount); 706 707/* fileio.c */ 708extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino, 709 struct ext2_inode *inode, 710 int flags, ext2_file_t *ret); 711extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino, 712 int flags, ext2_file_t *ret); 713extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 714extern errcode_t ext2fs_file_close(ext2_file_t file); 715extern errcode_t ext2fs_file_flush(ext2_file_t file); 716extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 717 unsigned int wanted, unsigned int *got); 718extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf, 719 unsigned int nbytes, unsigned int *written); 720extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset, 721 int whence, __u64 *ret_pos); 722extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 723 int whence, ext2_off_t *ret_pos); 724errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size); 725extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 726extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 727 728/* finddev.c */ 729extern char *ext2fs_find_block_device(dev_t device); 730 731/* flushb.c */ 732extern errcode_t ext2fs_sync_device(int fd, int flushb); 733 734/* freefs.c */ 735extern void ext2fs_free(ext2_filsys fs); 736extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 737extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 738extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 739extern void ext2fs_free_dblist(ext2_dblist dblist); 740extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb); 741extern void ext2fs_u32_list_free(ext2_u32_list bb); 742 743/* getsize.c */ 744extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 745 blk_t *retblocks); 746 747/* getsectsize.c */ 748errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize); 749 750/* imager.c */ 751extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags); 752extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags); 753extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags); 754extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags); 755extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags); 756extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags); 757 758/* initialize.c */ 759extern errcode_t ext2fs_initialize(const char *name, int flags, 760 struct ext2_super_block *param, 761 io_manager manager, ext2_filsys *ret_fs); 762 763/* icount.c */ 764extern void ext2fs_free_icount(ext2_icount_t icount); 765extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, 766 unsigned int size, 767 ext2_icount_t hint, ext2_icount_t *ret); 768extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, 769 unsigned int size, 770 ext2_icount_t *ret); 771extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino, 772 __u16 *ret); 773extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino, 774 __u16 *ret); 775extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino, 776 __u16 *ret); 777extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino, 778 __u16 count); 779extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount); 780errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 781 782/* inode.c */ 783extern errcode_t ext2fs_flush_icache(ext2_filsys fs); 784extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 785 ext2_inode_scan *ret_scan); 786extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 787extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino, 788 struct ext2_inode *inode); 789extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 790 int group); 791extern void ext2fs_set_inode_callback 792 (ext2_inode_scan scan, 793 errcode_t (*done_group)(ext2_filsys fs, 794 ext2_inode_scan scan, 795 dgrp_t group, 796 void * priv_data), 797 void *done_group_data); 798extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 799 int clear_flags); 800extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino, 801 struct ext2_inode * inode); 802extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino, 803 struct ext2_inode * inode); 804extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 805extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino); 806 807/* inode_io.c */ 808extern io_manager inode_io_manager; 809extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino, 810 char **name); 811extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino, 812 struct ext2_inode *inode, 813 char **name); 814 815/* ismounted.c */ 816extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 817extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags, 818 char *mtpt, int mtlen); 819 820/* namei.c */ 821extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, 822 int namelen, char *buf, ext2_ino_t *inode); 823extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 824 const char *name, ext2_ino_t *inode); 825errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 826 const char *name, ext2_ino_t *inode); 827extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 828 ext2_ino_t inode, ext2_ino_t *res_inode); 829 830/* native.c */ 831int ext2fs_native_flag(void); 832 833/* newdir.c */ 834extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, 835 ext2_ino_t parent_ino, char **block); 836 837/* mkdir.c */ 838extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, 839 const char *name); 840 841/* mkjournal.c */ 842extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs, 843 __u32 size, int flags, 844 char **ret_jsb); 845extern errcode_t ext2fs_add_journal_device(ext2_filsys fs, 846 ext2_filsys journal_dev); 847extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, 848 int flags); 849 850/* openfs.c */ 851extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 852 unsigned int block_size, io_manager manager, 853 ext2_filsys *ret_fs); 854extern errcode_t ext2fs_open2(const char *name, const char *io_options, 855 int flags, int superblock, 856 unsigned int block_size, io_manager manager, 857 ext2_filsys *ret_fs); 858extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, 859 dgrp_t i); 860errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io); 861errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io); 862errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io); 863 864/* get_pathname.c */ 865extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino, 866 char **name); 867 868/* link.c */ 869errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name, 870 ext2_ino_t ino, int flags); 871errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name, 872 ext2_ino_t ino, int flags); 873 874/* read_bb.c */ 875extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 876 ext2_badblocks_list *bb_list); 877 878/* read_bb_file.c */ 879extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 880 ext2_badblocks_list *bb_list, 881 void *priv_data, 882 void (*invalid)(ext2_filsys fs, 883 blk_t blk, 884 char *badstr, 885 void *priv_data)); 886extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 887 ext2_badblocks_list *bb_list, 888 void (*invalid)(ext2_filsys fs, 889 blk_t blk)); 890 891/* rs_bitmap.c */ 892extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, 893 __u32 new_real_end, 894 ext2fs_generic_bitmap bmap); 895extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 896 ext2fs_inode_bitmap bmap); 897extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 898 ext2fs_block_bitmap bmap); 899extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 900 ext2fs_generic_bitmap *dest); 901 902/* swapfs.c */ 903extern void ext2fs_swap_super(struct ext2_super_block * super); 904extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 905extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 906 struct ext2_inode *f, int hostorder); 907 908/* valid_blk.c */ 909extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 910 911/* version.c */ 912extern int ext2fs_parse_version_string(const char *ver_string); 913extern int ext2fs_get_library_version(const char **ver_string, 914 const char **date_string); 915 916/* write_bb_file.c */ 917extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list, 918 unsigned int flags, 919 FILE *f); 920 921 922/* inline functions */ 923extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr); 924extern errcode_t ext2fs_free_mem(void *ptr); 925extern errcode_t ext2fs_resize_mem(unsigned long old_size, 926 unsigned long size, void *ptr); 927extern void ext2fs_mark_super_dirty(ext2_filsys fs); 928extern void ext2fs_mark_changed(ext2_filsys fs); 929extern int ext2fs_test_changed(ext2_filsys fs); 930extern void ext2fs_mark_valid(ext2_filsys fs); 931extern void ext2fs_unmark_valid(ext2_filsys fs); 932extern int ext2fs_test_valid(ext2_filsys fs); 933extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 934extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 935extern int ext2fs_test_ib_dirty(ext2_filsys fs); 936extern int ext2fs_test_bb_dirty(ext2_filsys fs); 937extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 938extern int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino); 939extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 940 struct ext2_inode *inode); 941 942/* 943 * The actual inlined functions definitions themselves... 944 * 945 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 946 * functions at all! 947 */ 948#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 949#ifdef INCLUDE_INLINE_FUNCS 950#define _INLINE_ extern 951#else 952#ifdef __GNUC__ 953#define _INLINE_ extern __inline__ 954#else /* For Watcom C */ 955#define _INLINE_ extern inline 956#endif 957#endif 958 959#ifndef EXT2_CUSTOM_MEMORY_ROUTINES 960/* 961 * Allocate memory 962 */ 963_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr) 964{ 965 void **pp = (void **)ptr; 966 967 *pp = malloc(size); 968 if (!*pp) 969 return EXT2_ET_NO_MEMORY; 970 return 0; 971} 972 973/* 974 * Free memory 975 */ 976_INLINE_ errcode_t ext2fs_free_mem(void *ptr) 977{ 978 void **pp = (void **)ptr; 979 980 free(*pp); 981 *pp = 0; 982 return 0; 983} 984 985/* 986 * Resize memory 987 */ 988_INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size, 989 unsigned long size, void *ptr) 990{ 991 void *p; 992 void **pp = (void **)ptr; 993 994 p = realloc(*pp, size); 995 if (!p) 996 return EXT2_ET_NO_MEMORY; 997 *pp = p; 998 return 0; 999} 1000#endif /* Custom memory routines */ 1001 1002/* 1003 * Mark a filesystem superblock as dirty 1004 */ 1005_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 1006{ 1007 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 1008} 1009 1010/* 1011 * Mark a filesystem as changed 1012 */ 1013_INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 1014{ 1015 fs->flags |= EXT2_FLAG_CHANGED; 1016} 1017 1018/* 1019 * Check to see if a filesystem has changed 1020 */ 1021_INLINE_ int ext2fs_test_changed(ext2_filsys fs) 1022{ 1023 return (fs->flags & EXT2_FLAG_CHANGED); 1024} 1025 1026/* 1027 * Mark a filesystem as valid 1028 */ 1029_INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 1030{ 1031 fs->flags |= EXT2_FLAG_VALID; 1032} 1033 1034/* 1035 * Mark a filesystem as NOT valid 1036 */ 1037_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 1038{ 1039 fs->flags &= ~EXT2_FLAG_VALID; 1040} 1041 1042/* 1043 * Check to see if a filesystem is valid 1044 */ 1045_INLINE_ int ext2fs_test_valid(ext2_filsys fs) 1046{ 1047 return (fs->flags & EXT2_FLAG_VALID); 1048} 1049 1050/* 1051 * Mark the inode bitmap as dirty 1052 */ 1053_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 1054{ 1055 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 1056} 1057 1058/* 1059 * Mark the block bitmap as dirty 1060 */ 1061_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 1062{ 1063 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 1064} 1065 1066/* 1067 * Check to see if a filesystem's inode bitmap is dirty 1068 */ 1069_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 1070{ 1071 return (fs->flags & EXT2_FLAG_IB_DIRTY); 1072} 1073 1074/* 1075 * Check to see if a filesystem's block bitmap is dirty 1076 */ 1077_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 1078{ 1079 return (fs->flags & EXT2_FLAG_BB_DIRTY); 1080} 1081 1082/* 1083 * Return the group # of a block 1084 */ 1085_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 1086{ 1087 return (blk - fs->super->s_first_data_block) / 1088 fs->super->s_blocks_per_group; 1089} 1090 1091/* 1092 * Return the group # of an inode number 1093 */ 1094_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino) 1095{ 1096 return (ino - 1) / fs->super->s_inodes_per_group; 1097} 1098 1099_INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 1100 struct ext2_inode *inode) 1101{ 1102 return inode->i_blocks - 1103 (inode->i_file_acl ? fs->blocksize >> 9 : 0); 1104} 1105#undef _INLINE_ 1106#endif 1107 1108#ifdef __cplusplus 1109} 1110#endif 1111 1112#endif /* _EXT2FS_EXT2FS_H */ 1113