ext2fs.h revision ab146766e3c773ef532381328772ec5e9db9e40b
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 __cplusplus 16extern "C" { 17#endif 18 19/* 20 * Non-GNU C compilers won't necessarily understand inline 21 */ 22#if (!defined(__GNUC__) && !defined(__WATCOMC__)) 23#define NO_INLINE_FUNCS 24#endif 25 26/* 27 * Where the master copy of the superblock is located, and how big 28 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because 29 * the size of the superblock structure is not necessarily trustworthy 30 * (some versions have the padding set up so that the superblock is 31 * 1032 bytes long). 32 */ 33#define SUPERBLOCK_OFFSET 1024 34#define SUPERBLOCK_SIZE 1024 35 36/* 37 * The last ext2fs revision level that this version of the library is 38 * able to support. 39 */ 40#define EXT2_LIB_CURRENT_REV 0 41 42#ifdef HAVE_SYS_TYPES_H 43#include <sys/types.h> 44#endif 45 46#include <stdlib.h> 47 48#if EXT2_FLAT_INCLUDES 49#include "e2_types.h" 50#else 51#include <asm/types.h> 52#if !defined(__GNUC__) || defined(__STRICT_ANSI__) /* asm/types.h already defines __s64 and __u64 otherwise */ 53#if SIZEOF_LONG == 8 54typedef __signed__ long __s64; 55typedef unsigned long __u64; 56#elif SIZEOF_LONG_LONG == 8 || \ 57 defined(__GNUC__) && (((~0UL) == 0xffffffff) || defined(__i386__)) 58typedef __signed__ long long __s64; 59typedef unsigned long long __u64; 60#endif /* SIZEOF_LONG == 8 */ 61#endif 62#endif /* EXT2_FLAT_INCLUDES */ 63 64typedef __u32 blk_t; 65typedef __u32 dgrp_t; 66typedef __u32 ext2_off_t; 67typedef __s64 e2_blkcnt_t; 68 69#if EXT2_FLAT_INCLUDES 70#include "com_err.h" 71#include "ext2_io.h" 72#include "ext2_err.h" 73#else 74#include "et/com_err.h" 75#include "ext2fs/ext2_io.h" 76#include "ext2fs/ext2_err.h" 77#endif 78 79/* 80 * Portability help for Microsoft Visual C++ 81 */ 82#ifdef _MSC_VER 83#define EXT2_QSORT_TYPE int __cdecl 84#else 85#define EXT2_QSORT_TYPE int 86#endif 87 88typedef struct struct_ext2_filsys *ext2_filsys; 89 90struct ext2fs_struct_generic_bitmap { 91 errcode_t magic; 92 ext2_filsys fs; 93 __u32 start, end; 94 __u32 real_end; 95 char * description; 96 char * bitmap; 97 errcode_t base_error_code; 98 __u32 reserved[7]; 99}; 100 101#define EXT2FS_MARK_ERROR 0 102#define EXT2FS_UNMARK_ERROR 1 103#define EXT2FS_TEST_ERROR 2 104 105typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap; 106typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap; 107typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap; 108 109#ifdef EXT2_DYNAMIC_REV 110#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s) 111#else 112#define EXT2_FIRST_INODE(s) EXT2_FIRST_INO 113#define EXT2_INODE_SIZE(s) sizeof(struct ext2_inode) 114#endif 115 116/* 117 * badblocks list definitions 118 */ 119 120typedef struct ext2_struct_badblocks_list *ext2_badblocks_list; 121typedef struct ext2_struct_badblocks_iterate *ext2_badblocks_iterate; 122 123/* old */ 124typedef struct ext2_struct_badblocks_list *badblocks_list; 125typedef struct ext2_struct_badblocks_iterate *badblocks_iterate; 126 127#define BADBLOCKS_FLAG_DIRTY 1 128 129/* 130 * ext2_dblist structure and abstractions (see dblist.c) 131 */ 132struct ext2_db_entry { 133 ino_t ino; 134 blk_t blk; 135 int blockcnt; 136}; 137 138typedef struct ext2_struct_dblist *ext2_dblist; 139 140#define DBLIST_ABORT 1 141 142/* 143 * ext2_fileio definitions 144 */ 145 146#define EXT2_FILE_WRITE 0x0001 147#define EXT2_FILE_CREATE 0x0002 148 149#define EXT2_FILE_MASK 0x00FF 150 151#define EXT2_FILE_BUF_DIRTY 0x4000 152#define EXT2_FILE_BUF_VALID 0x2000 153 154typedef struct ext2_file *ext2_file_t; 155 156#define EXT2_SEEK_SET 0 157#define EXT2_SEEK_CUR 1 158#define EXT2_SEEK_END 2 159 160/* 161 * Flags for the ext2_filsys structure 162 */ 163 164#define EXT2_FLAG_RW 0x01 165#define EXT2_FLAG_CHANGED 0x02 166#define EXT2_FLAG_DIRTY 0x04 167#define EXT2_FLAG_VALID 0x08 168#define EXT2_FLAG_IB_DIRTY 0x10 169#define EXT2_FLAG_BB_DIRTY 0x20 170#define EXT2_FLAG_SWAP_BYTES 0x40 171#define EXT2_FLAG_SWAP_BYTES_READ 0x80 172#define EXT2_FLAG_SWAP_BYTES_WRITE 0x100 173#define EXT2_FLAG_MASTER_SB_ONLY 0x200 174#define EXT2_FLAG_FORCE 0x400 175 176/* 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.) 179 */ 180#define EXT2_NEW_INODE_FL 0x80000000 181 182struct struct_ext2_filsys { 183 errcode_t magic; 184 io_channel io; 185 int flags; 186 char * device_name; 187 struct ext2_super_block * super; 188 int blocksize; 189 int fragsize; 190 dgrp_t group_desc_count; 191 unsigned long desc_blocks; 192 struct ext2_group_desc * group_desc; 193 int inode_blocks_per_group; 194 ext2fs_inode_bitmap inode_map; 195 ext2fs_block_bitmap block_map; 196 errcode_t (*get_blocks)(ext2_filsys fs, ino_t ino, blk_t *blocks); 197 errcode_t (*check_directory)(ext2_filsys fs, ino_t ino); 198 errcode_t (*write_bitmaps)(ext2_filsys fs); 199 errcode_t (*read_inode)(ext2_filsys fs, ino_t ino, 200 struct ext2_inode *inode); 201 errcode_t (*write_inode)(ext2_filsys fs, ino_t ino, 202 struct ext2_inode *inode); 203 badblocks_list badblocks; 204 ext2_dblist dblist; 205 __u32 stride; /* for mke2fs */ 206 /* 207 * Reserved for future expansion 208 */ 209 __u32 reserved[11]; 210 211 /* 212 * Reserved for the use of the calling application. 213 */ 214 void * priv_data; 215 216 /* 217 * Inode cache 218 */ 219 struct ext2_inode_cache *icache; 220}; 221 222#if EXT2_FLAT_INCLUDES 223#include "e2_bitops.h" 224#else 225#include "ext2fs/bitops.h" 226#endif 227 228/* 229 * Return flags for the block iterator functions 230 */ 231#define BLOCK_CHANGED 1 232#define BLOCK_ABORT 2 233#define BLOCK_ERROR 4 234 235/* 236 * Block interate flags 237 * 238 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 239 * function should be called on blocks where the block number is zero. 240 * This is used by ext2fs_expand_dir() to be able to add a new block 241 * to an inode. It can also be used for programs that want to be able 242 * to deal with files that contain "holes". 243 * 244 * BLOCK_FLAG_TRAVERSE indicates that the iterator function for the 245 * indirect, doubly indirect, etc. blocks should be called after all 246 * of the blocks containined in the indirect blocks are processed. 247 * This is useful if you are going to be deallocating blocks from an 248 * inode. 249 * 250 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 251 * called for data blocks only. 252 * 253 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 254 * ext2fs_block_iterate2 that large files won't be accepted. 255 */ 256#define BLOCK_FLAG_APPEND 1 257#define BLOCK_FLAG_HOLE 1 258#define BLOCK_FLAG_DEPTH_TRAVERSE 2 259#define BLOCK_FLAG_DATA_ONLY 4 260 261#define BLOCK_FLAG_NO_LARGE 0x1000 262 263/* 264 * Magic "block count" return values for the block iterator function. 265 */ 266#define BLOCK_COUNT_IND (-1) 267#define BLOCK_COUNT_DIND (-2) 268#define BLOCK_COUNT_TIND (-3) 269#define BLOCK_COUNT_TRANSLATOR (-4) 270 271#if 0 272/* 273 * Flags for ext2fs_move_blocks 274 */ 275#define EXT2_BMOVE_GET_DBLIST 0x0001 276#define EXT2_BMOVE_DEBUG 0x0002 277#endif 278 279/* 280 * Return flags for the directory iterator functions 281 */ 282#define DIRENT_CHANGED 1 283#define DIRENT_ABORT 2 284#define DIRENT_ERROR 3 285 286/* 287 * Directory iterator flags 288 */ 289 290#define DIRENT_FLAG_INCLUDE_EMPTY 1 291 292 293#define DIRENT_DOT_FILE 1 294#define DIRENT_DOT_DOT_FILE 2 295#define DIRENT_OTHER_FILE 3 296 297/* 298 * Inode scan definitions 299 */ 300typedef struct ext2_struct_inode_scan *ext2_inode_scan; 301 302/* 303 * ext2fs_scan flags 304 */ 305#define EXT2_SF_CHK_BADBLOCKS 0x0001 306#define EXT2_SF_BAD_INODE_BLK 0x0002 307#define EXT2_SF_BAD_EXTRA_BYTES 0x0004 308#define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 309 310/* 311 * ext2fs_check_if_mounted flags 312 */ 313#define EXT2_MF_MOUNTED 1 314#define EXT2_MF_ISROOT 2 315#define EXT2_MF_READONLY 4 316 317/* 318 * Ext2/linux mode flags. We define them here so that we don't need 319 * to depend on the OS's sys/stat.h, since we may be compiling on a 320 * non-Linux system. 321 */ 322#define LINUX_S_IFMT 00170000 323#define LINUX_S_IFSOCK 0140000 324#define LINUX_S_IFLNK 0120000 325#define LINUX_S_IFREG 0100000 326#define LINUX_S_IFBLK 0060000 327#define LINUX_S_IFDIR 0040000 328#define LINUX_S_IFCHR 0020000 329#define LINUX_S_IFIFO 0010000 330#define LINUX_S_ISUID 0004000 331#define LINUX_S_ISGID 0002000 332#define LINUX_S_ISVTX 0001000 333 334#define LINUX_S_IRWXU 00700 335#define LINUX_S_IRUSR 00400 336#define LINUX_S_IWUSR 00200 337#define LINUX_S_IXUSR 00100 338 339#define LINUX_S_IRWXG 00070 340#define LINUX_S_IRGRP 00040 341#define LINUX_S_IWGRP 00020 342#define LINUX_S_IXGRP 00010 343 344#define LINUX_S_IRWXO 00007 345#define LINUX_S_IROTH 00004 346#define LINUX_S_IWOTH 00002 347#define LINUX_S_IXOTH 00001 348 349#define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 350#define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 351#define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 352#define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 353#define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 354#define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 355#define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 356 357/* 358 * ext2_icount_t abstraction 359 */ 360#define EXT2_ICOUNT_OPT_INCREMENT 0x01 361 362typedef struct ext2_icount *ext2_icount_t; 363 364/* 365 * Flags for ext2fs_bmap 366 */ 367#define BMAP_ALLOC 1 368 369/* 370 * For checking structure magic numbers... 371 */ 372 373#define EXT2_CHECK_MAGIC(struct, code) \ 374 if ((struct)->magic != (code)) return (code) 375 376 377/* 378 * The ext2fs library private definition of the ext2 superblock, so we 379 * don't have to depend on the kernel's definition of the superblock, 380 * which might not have the latest features. 381 */ 382struct ext2fs_sb { 383 __u32 s_inodes_count; /* Inodes count */ 384 __u32 s_blocks_count; /* Blocks count */ 385 __u32 s_r_blocks_count; /* Reserved blocks count */ 386 __u32 s_free_blocks_count; /* Free blocks count */ 387 __u32 s_free_inodes_count; /* Free inodes count */ 388 __u32 s_first_data_block; /* First Data Block */ 389 __u32 s_log_block_size; /* Block size */ 390 __s32 s_log_frag_size; /* Fragment size */ 391 __u32 s_blocks_per_group; /* # Blocks per group */ 392 __u32 s_frags_per_group; /* # Fragments per group */ 393 __u32 s_inodes_per_group; /* # Inodes per group */ 394 __u32 s_mtime; /* Mount time */ 395 __u32 s_wtime; /* Write time */ 396 __u16 s_mnt_count; /* Mount count */ 397 __s16 s_max_mnt_count; /* Maximal mount count */ 398 __u16 s_magic; /* Magic signature */ 399 __u16 s_state; /* File system state */ 400 __u16 s_errors; /* Behaviour when detecting errors */ 401 __u16 s_minor_rev_level; /* minor revision level */ 402 __u32 s_lastcheck; /* time of last check */ 403 __u32 s_checkinterval; /* max. time between checks */ 404 __u32 s_creator_os; /* OS */ 405 __u32 s_rev_level; /* Revision level */ 406 __u16 s_def_resuid; /* Default uid for reserved blocks */ 407 __u16 s_def_resgid; /* Default gid for reserved blocks */ 408 /* 409 * These fields are for EXT2_DYNAMIC_REV superblocks only. 410 * 411 * Note: the difference between the compatible feature set and 412 * the incompatible feature set is that if there is a bit set 413 * in the incompatible feature set that the kernel doesn't 414 * know about, it should refuse to mount the filesystem. 415 * 416 * e2fsck's requirements are more strict; if it doesn't know 417 * about a feature in either the compatible or incompatible 418 * feature set, it must abort and not try to meddle with 419 * things it doesn't understand... 420 */ 421 __u32 s_first_ino; /* First non-reserved inode */ 422 __u16 s_inode_size; /* size of inode structure */ 423 __u16 s_block_group_nr; /* block group # of this superblock */ 424 __u32 s_feature_compat; /* compatible feature set */ 425 __u32 s_feature_incompat; /* incompatible feature set */ 426 __u32 s_feature_ro_compat; /* readonly-compatible feature set */ 427 __u8 s_uuid[16]; /* 128-bit uuid for volume */ 428 char s_volume_name[16]; /* volume name */ 429 char s_last_mounted[64]; /* directory where last mounted */ 430 __u32 s_algorithm_usage_bitmap; /* For compression */ 431 /* 432 * Performance hints. Directory preallocation should only 433 * happen if the EXT2_FEATURE_COMPAT_DIR_PREALLOC flag is on. 434 */ 435 __u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/ 436 __u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */ 437 __u16 s_padding1; 438 /* 439 * Journaling support. 440 */ 441 __u8 s_journal_uuid[16]; /* uuid of journal superblock */ 442 __u32 s_journal_inum; /* inode number of journal file */ 443 __u32 s_journal_dev; /* device number of journal file */ 444 __u32 s_last_orphan; /* start of list of inodes to delete */ 445 446 __u32 s_reserved[197]; /* Padding to the end of the block */ 447}; 448 449#define EXT2FS_COMPRESSED_BLKADDR ((blk_t) 0xffffffff) 450#define HOLE_BLKADDR(_b) ((_b) == 0 || (_b) == EXT2FS_COMPRESSED_BLKADDR) 451 452/* 453 * Feature set definitions (that might not be in ext2_fs.h 454 */ 455 456#ifndef EXT2_FEATURE_COMPAT_DIR_PREALLOC 457#define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001 458#endif 459 460#ifndef EXT2_FEATURE_COMPAT_IMAGIC_INODES /* for AFS, etc. */ 461#define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002 462#define EXT2_IMAGIC_FL 0x00002000 463#endif 464 465#ifndef EXT3_FEATURE_COMPAT_HAS_JOURNAL 466#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004 467#endif 468 469#ifndef EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 470#define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001 471#endif 472 473#ifndef EXT2_FEATURE_RO_COMPAT_LARGE_FILE 474#define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002 475#define i_size_high i_dir_acl 476#endif 477 478#ifndef EXT2_FEATURE_RO_COMPAT_BTREE_DIR 479#define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004 480#endif 481 482#ifndef EXT2_FEATURE_INCOMPAT_COMPRESSION 483#define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 484#endif 485 486#ifndef EXT2_FEATURE_INCOMPAT_FILETYPE 487#define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 488#endif 489 490#ifndef EXT3_FEATURE_INCOMPAT_RECOVER 491#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */ 492#endif 493 494#define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 495 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 496 EXT3_FEATURE_COMPAT_HAS_JOURNAL) 497/* This #ifdef is temporary until compression is fully supported */ 498#ifdef ENABLE_COMPRESSION 499#ifndef I_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL 500/* If the below warning bugs you, then have 501 `CPPFLAGS=-DI_KNOW_THAT_COMPRESSION_IS_EXPERIMENTAL' in your 502 environment at configure time. */ 503#warning "Compression support is experimental" 504#endif 505#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 506 EXT2_FEATURE_INCOMPAT_COMPRESSION|\ 507 EXT3_FEATURE_INCOMPAT_RECOVER) 508#else 509#define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 510 EXT3_FEATURE_INCOMPAT_RECOVER) 511#endif 512#define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 513 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) 514/* 515 * function prototypes 516 */ 517 518/* alloc.c */ 519extern errcode_t ext2fs_new_inode(ext2_filsys fs, ino_t dir, int mode, 520 ext2fs_inode_bitmap map, ino_t *ret); 521extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 522 ext2fs_block_bitmap map, blk_t *ret); 523extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 524 blk_t finish, int num, 525 ext2fs_block_bitmap map, 526 blk_t *ret); 527extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 528 char *block_buf, blk_t *ret); 529 530/* alloc_tables.c */ 531extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 532extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 533 ext2fs_block_bitmap bmap); 534 535/* badblocks.c */ 536extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 537 int size); 538extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 539 blk_t blk); 540extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 541 blk_t blk); 542extern errcode_t 543 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 544 ext2_badblocks_iterate *ret); 545extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 546 blk_t *blk); 547extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 548extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 549 ext2_badblocks_list *dest); 550extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 551 ext2_badblocks_list bb2); 552 553/* bb_compat */ 554extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 555extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 556extern int badblocks_list_test(badblocks_list bb, blk_t blk); 557extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 558 badblocks_iterate *ret); 559extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 560extern void badblocks_list_iterate_end(badblocks_iterate iter); 561extern void badblocks_list_free(badblocks_list bb); 562 563/* bb_inode.c */ 564extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 565 ext2_badblocks_list bb_list); 566 567/* bitmaps.c */ 568extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 569extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 570extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 571extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 572extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 573 __u32 end, 574 __u32 real_end, 575 const char *descr, 576 ext2fs_generic_bitmap *ret); 577extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 578 const char *descr, 579 ext2fs_block_bitmap *ret); 580extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 581 const char *descr, 582 ext2fs_inode_bitmap *ret); 583extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 584 ino_t end, ino_t *oend); 585extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 586 blk_t end, blk_t *oend); 587extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 588extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 589extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 590extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 591 592/* block.c */ 593extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 594 ino_t ino, 595 int flags, 596 char *block_buf, 597 int (*func)(ext2_filsys fs, 598 blk_t *blocknr, 599 int blockcnt, 600 void *priv_data), 601 void *priv_data); 602errcode_t ext2fs_block_iterate2(ext2_filsys fs, 603 ino_t ino, 604 int flags, 605 char *block_buf, 606 int (*func)(ext2_filsys fs, 607 blk_t *blocknr, 608 e2_blkcnt_t blockcnt, 609 blk_t ref_blk, 610 int ref_offset, 611 void *priv_data), 612 void *priv_data); 613 614/* bmap.c */ 615extern errcode_t ext2fs_bmap(ext2_filsys fs, ino_t ino, 616 struct ext2_inode *inode, 617 char *block_buf, int bmap_flags, 618 blk_t block, blk_t *phys_blk); 619 620 621#if 0 622/* bmove.c */ 623extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 624 ext2fs_block_bitmap reserve, 625 ext2fs_block_bitmap alloc_map, 626 int flags); 627#endif 628 629/* check_desc.c */ 630extern errcode_t ext2fs_check_desc(ext2_filsys fs); 631 632/* closefs.c */ 633extern errcode_t ext2fs_close(ext2_filsys fs); 634extern errcode_t ext2fs_flush(ext2_filsys fs); 635extern int ext2fs_bg_has_super(ext2_filsys fs, int group_block); 636 637/* cmp_bitmaps.c */ 638extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 639 ext2fs_block_bitmap bm2); 640extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 641 ext2fs_inode_bitmap bm2); 642 643/* dblist.c */ 644 645extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ino_t *ret_num_dirs); 646extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 647extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ino_t ino, 648 blk_t blk, int blockcnt); 649extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 650 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 651 void *priv_data), 652 void *priv_data); 653extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ino_t ino, 654 blk_t blk, int blockcnt); 655extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 656 ext2_dblist *dest); 657extern int ext2fs_dblist_count(ext2_dblist dblist); 658 659/* dblist_dir.c */ 660extern errcode_t 661 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 662 int flags, 663 char *block_buf, 664 int (*func)(ino_t dir, 665 int entry, 666 struct ext2_dir_entry *dirent, 667 int offset, 668 int blocksize, 669 char *buf, 670 void *priv_data), 671 void *priv_data); 672 673/* dirblock.c */ 674extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 675 void *buf); 676extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 677 void *buf); 678 679/* dir_iterate.c */ 680extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 681 ino_t dir, 682 int flags, 683 char *block_buf, 684 int (*func)(struct ext2_dir_entry *dirent, 685 int offset, 686 int blocksize, 687 char *buf, 688 void *priv_data), 689 void *priv_data); 690 691/* dupfs.c */ 692extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 693 694/* expanddir.c */ 695extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ino_t dir); 696 697/* fileio.c */ 698extern errcode_t ext2fs_file_open(ext2_filsys fs, ino_t ino, 699 int flags, ext2_file_t *ret); 700extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 701extern errcode_t ext2fs_file_close(ext2_file_t file); 702extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 703 unsigned int wanted, unsigned int *got); 704extern errcode_t ext2fs_file_write(ext2_file_t file, void *buf, 705 unsigned int nbytes, unsigned int *written); 706extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 707 int whence, ext2_off_t *ret_pos); 708extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 709extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 710 711/* freefs.c */ 712extern void ext2fs_free(ext2_filsys fs); 713extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 714extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 715extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 716extern void ext2fs_free_dblist(ext2_dblist dblist); 717extern void ext2fs_badblocks_list_free(badblocks_list bb); 718 719/* getsize.c */ 720extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 721 blk_t *retblocks); 722 723/* initialize.c */ 724extern errcode_t ext2fs_initialize(const char *name, int flags, 725 struct ext2_super_block *param, 726 io_manager manager, ext2_filsys *ret_fs); 727 728/* inode.c */ 729extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 730 ext2_inode_scan *ret_scan); 731extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 732extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ino_t *ino, 733 struct ext2_inode *inode); 734extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 735 int group); 736extern void ext2fs_set_inode_callback 737 (ext2_inode_scan scan, 738 errcode_t (*done_group)(ext2_filsys fs, 739 ext2_inode_scan scan, 740 dgrp_t group, 741 void * priv_data), 742 void *done_group_data); 743extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 744 int clear_flags); 745extern errcode_t ext2fs_read_inode (ext2_filsys fs, ino_t ino, 746 struct ext2_inode * inode); 747extern errcode_t ext2fs_write_inode(ext2_filsys fs, ino_t ino, 748 struct ext2_inode * inode); 749extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ino_t ino, blk_t *blocks); 750extern errcode_t ext2fs_check_directory(ext2_filsys fs, ino_t ino); 751 752/* icount.c */ 753extern void ext2fs_free_icount(ext2_icount_t icount); 754extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, int size, 755 ext2_icount_t hint, ext2_icount_t *ret); 756extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, int size, 757 ext2_icount_t *ret); 758extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ino_t ino, 759 __u16 *ret); 760extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ino_t ino, 761 __u16 *ret); 762extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ino_t ino, 763 __u16 *ret); 764extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ino_t ino, 765 __u16 count); 766extern ino_t ext2fs_get_icount_size(ext2_icount_t icount); 767errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 768 769/* ismounted.c */ 770extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 771 772/* namei.c */ 773extern errcode_t ext2fs_lookup(ext2_filsys fs, ino_t dir, const char *name, 774 int namelen, char *buf, ino_t *inode); 775extern errcode_t ext2fs_namei(ext2_filsys fs, ino_t root, ino_t cwd, 776 const char *name, ino_t *inode); 777errcode_t ext2fs_namei_follow(ext2_filsys fs, ino_t root, ino_t cwd, 778 const char *name, ino_t *inode); 779extern errcode_t ext2fs_follow_link(ext2_filsys fs, ino_t root, ino_t cwd, 780 ino_t inode, ino_t *res_inode); 781 782/* native.c */ 783int ext2fs_native_flag(void); 784 785/* newdir.c */ 786extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ino_t dir_ino, 787 ino_t parent_ino, char **block); 788 789/* mkdir.c */ 790extern errcode_t ext2fs_mkdir(ext2_filsys fs, ino_t parent, ino_t inum, 791 const char *name); 792 793/* openfs.c */ 794extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 795 int block_size, io_manager manager, 796 ext2_filsys *ret_fs); 797 798/* get_pathname.c */ 799extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ino_t dir, ino_t ino, 800 char **name); 801 802/* link.c */ 803errcode_t ext2fs_link(ext2_filsys fs, ino_t dir, const char *name, 804 ino_t ino, int flags); 805errcode_t ext2fs_unlink(ext2_filsys fs, ino_t dir, const char *name, 806 ino_t ino, int flags); 807 808/* read_bb.c */ 809extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 810 ext2_badblocks_list *bb_list); 811 812/* read_bb_file.c */ 813extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 814 ext2_badblocks_list *bb_list, 815 void *private, 816 void (*invalid)(ext2_filsys fs, 817 blk_t blk, 818 char *badstr, 819 void *private)); 820extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 821 ext2_badblocks_list *bb_list, 822 void (*invalid)(ext2_filsys fs, 823 blk_t blk)); 824 825/* rs_bitmap.c */ 826extern errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, 827 __u32 new_real_end, 828 ext2fs_generic_bitmap bmap); 829extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 830 ext2fs_inode_bitmap bmap); 831extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 832 ext2fs_block_bitmap bmap); 833extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 834 ext2fs_generic_bitmap *dest); 835 836/* swapfs.c */ 837extern void ext2fs_swap_super(struct ext2_super_block * super); 838extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 839extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 840 struct ext2_inode *f, int hostorder); 841 842/* valid_blk.c */ 843extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 844 845/* version.c */ 846extern int ext2fs_parse_version_string(const char *ver_string); 847extern int ext2fs_get_library_version(const char **ver_string, 848 const char **date_string); 849 850/* inline functions */ 851extern errcode_t ext2fs_get_mem(unsigned long size, void **ptr); 852extern errcode_t ext2fs_free_mem(void **ptr); 853extern errcode_t ext2fs_resize_mem(unsigned long old_size, 854 unsigned long size, void **ptr); 855extern void ext2fs_mark_super_dirty(ext2_filsys fs); 856extern void ext2fs_mark_changed(ext2_filsys fs); 857extern int ext2fs_test_changed(ext2_filsys fs); 858extern void ext2fs_mark_valid(ext2_filsys fs); 859extern void ext2fs_unmark_valid(ext2_filsys fs); 860extern int ext2fs_test_valid(ext2_filsys fs); 861extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 862extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 863extern int ext2fs_test_ib_dirty(ext2_filsys fs); 864extern int ext2fs_test_bb_dirty(ext2_filsys fs); 865extern int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 866extern int ext2fs_group_of_ino(ext2_filsys fs, ino_t ino); 867 868/* 869 * The actual inlined functions definitions themselves... 870 * 871 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 872 * functions at all! 873 */ 874#if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 875#ifdef INCLUDE_INLINE_FUNCS 876#define _INLINE_ extern 877#else 878#ifdef __GNUC__ 879#define _INLINE_ extern __inline__ 880#else /* For Watcom C */ 881#define _INLINE_ extern inline 882#endif 883#endif 884 885#ifndef EXT2_CUSTOM_MEMORY_ROUTINES 886/* 887 * Allocate memory 888 */ 889_INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void **ptr) 890{ 891 *ptr = malloc(size); 892 if (!*ptr) 893 return EXT2_ET_NO_MEMORY; 894 return 0; 895} 896 897/* 898 * Free memory 899 */ 900_INLINE_ errcode_t ext2fs_free_mem(void **ptr) 901{ 902 free(*ptr); 903 *ptr = 0; 904 return 0; 905} 906 907/* 908 * Resize memory 909 */ 910_INLINE_ errcode_t ext2fs_resize_mem(unsigned long old_size, 911 unsigned long size, void **ptr) 912{ 913 void *p; 914 915 p = realloc(*ptr, size); 916 if (!p) 917 return EXT2_ET_NO_MEMORY; 918 *ptr = p; 919 return 0; 920} 921#endif /* Custom memory routines */ 922 923/* 924 * Mark a filesystem superblock as dirty 925 */ 926_INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 927{ 928 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 929} 930 931/* 932 * Mark a filesystem as changed 933 */ 934_INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 935{ 936 fs->flags |= EXT2_FLAG_CHANGED; 937} 938 939/* 940 * Check to see if a filesystem has changed 941 */ 942_INLINE_ int ext2fs_test_changed(ext2_filsys fs) 943{ 944 return (fs->flags & EXT2_FLAG_CHANGED); 945} 946 947/* 948 * Mark a filesystem as valid 949 */ 950_INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 951{ 952 fs->flags |= EXT2_FLAG_VALID; 953} 954 955/* 956 * Mark a filesystem as NOT valid 957 */ 958_INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 959{ 960 fs->flags &= ~EXT2_FLAG_VALID; 961} 962 963/* 964 * Check to see if a filesystem is valid 965 */ 966_INLINE_ int ext2fs_test_valid(ext2_filsys fs) 967{ 968 return (fs->flags & EXT2_FLAG_VALID); 969} 970 971/* 972 * Mark the inode bitmap as dirty 973 */ 974_INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 975{ 976 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 977} 978 979/* 980 * Mark the block bitmap as dirty 981 */ 982_INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 983{ 984 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 985} 986 987/* 988 * Check to see if a filesystem's inode bitmap is dirty 989 */ 990_INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 991{ 992 return (fs->flags & EXT2_FLAG_IB_DIRTY); 993} 994 995/* 996 * Check to see if a filesystem's block bitmap is dirty 997 */ 998_INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 999{ 1000 return (fs->flags & EXT2_FLAG_BB_DIRTY); 1001} 1002 1003/* 1004 * Return the group # of a block 1005 */ 1006_INLINE_ int ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 1007{ 1008 return (blk - fs->super->s_first_data_block) / 1009 fs->super->s_blocks_per_group; 1010} 1011 1012/* 1013 * Return the group # of an inode number 1014 */ 1015_INLINE_ int ext2fs_group_of_ino(ext2_filsys fs, ino_t ino) 1016{ 1017 return (ino - 1) / fs->super->s_inodes_per_group; 1018} 1019#undef _INLINE_ 1020#endif 1021 1022#ifdef __cplusplus 1023} 1024#endif 1025 1026#endif /* _EXT2FS_EXT2FS_H */ 1027