1 /* 2 * ext2fs.h --- ext2fs 3 * 4 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o. 5 * 6 * %Begin-Header% 7 * This file may be redistributed under the terms of the GNU Library 8 * General Public License, version 2. 9 * %End-Header% 10 */ 11 12 #ifndef _EXT2FS_EXT2FS_H 13 #define _EXT2FS_EXT2FS_H 14 15 #ifdef __GNUC__ 16 #define EXT2FS_ATTR(x) __attribute__(x) 17 #else 18 #define EXT2FS_ATTR(x) 19 #endif 20 21 #ifdef CONFIG_TDB 22 #define EXT2FS_NO_TDB_UNUSED 23 #else 24 #define EXT2FS_NO_TDB_UNUSED EXT2FS_ATTR((unused)) 25 #endif 26 27 #ifdef __cplusplus 28 extern "C" { 29 #endif 30 31 /* 32 * Non-GNU C compilers won't necessarily understand inline 33 */ 34 #if (!defined(__GNUC__) && !defined(__WATCOMC__)) 35 #define NO_INLINE_FUNCS 36 #endif 37 38 /* 39 * Where the master copy of the superblock is located, and how big 40 * superblocks are supposed to be. We define SUPERBLOCK_SIZE because 41 * the size of the superblock structure is not necessarily trustworthy 42 * (some versions have the padding set up so that the superblock is 43 * 1032 bytes long). 44 */ 45 #define SUPERBLOCK_OFFSET 1024 46 #define SUPERBLOCK_SIZE 1024 47 48 #define UUID_STR_SIZE 37 49 50 /* 51 * The last ext2fs revision level that this version of the library is 52 * able to support. 53 */ 54 #define EXT2_LIB_CURRENT_REV EXT2_DYNAMIC_REV 55 56 #ifdef HAVE_SYS_TYPES_H 57 #include <sys/types.h> 58 #endif 59 60 #include <stdio.h> 61 #include <stdlib.h> 62 #include <string.h> 63 #include <time.h> 64 #include <errno.h> 65 66 #if EXT2_FLAT_INCLUDES 67 #include "e2_types.h" 68 #include "ext2_fs.h" 69 #include "ext3_extents.h" 70 #else 71 #include <ext2fs/ext2_types.h> 72 #include <ext2fs/ext2_fs.h> 73 #include <ext2fs/ext3_extents.h> 74 #endif /* EXT2_FLAT_INCLUDES */ 75 76 typedef __u32 __bitwise ext2_ino_t; 77 typedef __u32 __bitwise blk_t; 78 typedef __u64 __bitwise blk64_t; 79 typedef __u32 __bitwise dgrp_t; 80 typedef __u32 __bitwise ext2_off_t; 81 typedef __u64 __bitwise ext2_off64_t; 82 typedef __s64 __bitwise e2_blkcnt_t; 83 typedef __u32 __bitwise ext2_dirhash_t; 84 85 #if EXT2_FLAT_INCLUDES 86 #include "com_err.h" 87 #include "ext2_io.h" 88 #include "ext2_err.h" 89 #include "ext2_ext_attr.h" 90 #else 91 #include <et/com_err.h> 92 #include <ext2fs/ext2_io.h> 93 #include <ext2fs/ext2_err.h> 94 #include <ext2fs/ext2_ext_attr.h> 95 #endif 96 97 #include "hashmap.h" 98 99 /* 100 * Portability help for Microsoft Visual C++ 101 */ 102 #ifdef _MSC_VER 103 #define EXT2_QSORT_TYPE int __cdecl 104 #else 105 #define EXT2_QSORT_TYPE int 106 #endif 107 108 typedef struct struct_ext2_filsys *ext2_filsys; 109 110 #define EXT2FS_MARK_ERROR 0 111 #define EXT2FS_UNMARK_ERROR 1 112 #define EXT2FS_TEST_ERROR 2 113 114 typedef struct ext2fs_struct_generic_bitmap *ext2fs_generic_bitmap; 115 typedef struct ext2fs_struct_generic_bitmap *ext2fs_inode_bitmap; 116 typedef struct ext2fs_struct_generic_bitmap *ext2fs_block_bitmap; 117 118 #define EXT2_FIRST_INODE(s) EXT2_FIRST_INO(s) 119 120 121 /* 122 * Badblocks list definitions 123 */ 124 125 typedef struct ext2_struct_u32_list *ext2_badblocks_list; 126 typedef struct ext2_struct_u32_iterate *ext2_badblocks_iterate; 127 128 typedef struct ext2_struct_u32_list *ext2_u32_list; 129 typedef struct ext2_struct_u32_iterate *ext2_u32_iterate; 130 131 /* old */ 132 typedef struct ext2_struct_u32_list *badblocks_list; 133 typedef struct ext2_struct_u32_iterate *badblocks_iterate; 134 135 #define BADBLOCKS_FLAG_DIRTY 1 136 137 /* 138 * ext2_dblist structure and abstractions (see dblist.c) 139 */ 140 struct ext2_db_entry2 { 141 ext2_ino_t ino; 142 blk64_t blk; 143 e2_blkcnt_t blockcnt; 144 }; 145 146 /* Ye Olde 32-bit version */ 147 struct ext2_db_entry { 148 ext2_ino_t ino; 149 blk_t blk; 150 int blockcnt; 151 }; 152 153 typedef struct ext2_struct_dblist *ext2_dblist; 154 155 #define DBLIST_ABORT 1 156 157 /* 158 * ext2_fileio definitions 159 */ 160 161 #define EXT2_FILE_WRITE 0x0001 162 #define EXT2_FILE_CREATE 0x0002 163 164 #define EXT2_FILE_MASK 0x00FF 165 166 #define EXT2_FILE_BUF_DIRTY 0x4000 167 #define EXT2_FILE_BUF_VALID 0x2000 168 169 typedef struct ext2_file *ext2_file_t; 170 171 #define EXT2_SEEK_SET 0 172 #define EXT2_SEEK_CUR 1 173 #define EXT2_SEEK_END 2 174 175 /* 176 * Flags for the ext2_filsys structure and for ext2fs_open() 177 */ 178 #define EXT2_FLAG_RW 0x01 179 #define EXT2_FLAG_CHANGED 0x02 180 #define EXT2_FLAG_DIRTY 0x04 181 #define EXT2_FLAG_VALID 0x08 182 #define EXT2_FLAG_IB_DIRTY 0x10 183 #define EXT2_FLAG_BB_DIRTY 0x20 184 #define EXT2_FLAG_SWAP_BYTES 0x40 185 #define EXT2_FLAG_SWAP_BYTES_READ 0x80 186 #define EXT2_FLAG_SWAP_BYTES_WRITE 0x100 187 #define EXT2_FLAG_MASTER_SB_ONLY 0x200 188 #define EXT2_FLAG_FORCE 0x400 189 #define EXT2_FLAG_SUPER_ONLY 0x800 190 #define EXT2_FLAG_JOURNAL_DEV_OK 0x1000 191 #define EXT2_FLAG_IMAGE_FILE 0x2000 192 #define EXT2_FLAG_EXCLUSIVE 0x4000 193 #define EXT2_FLAG_SOFTSUPP_FEATURES 0x8000 194 #define EXT2_FLAG_NOFREE_ON_ERROR 0x10000 195 #define EXT2_FLAG_64BITS 0x20000 196 #define EXT2_FLAG_PRINT_PROGRESS 0x40000 197 #define EXT2_FLAG_DIRECT_IO 0x80000 198 #define EXT2_FLAG_SKIP_MMP 0x100000 199 #define EXT2_FLAG_IGNORE_CSUM_ERRORS 0x200000 200 #define EXT2_FLAG_SHARE_DUP 0x400000 201 #define EXT2_FLAG_IGNORE_SB_ERRORS 0x800000 202 203 /* 204 * Special flag in the ext2 inode i_flag field that means that this is 205 * a new inode. (So that ext2_write_inode() can clear extra fields.) 206 */ 207 #define EXT2_NEW_INODE_FL 0x80000000 208 209 /* 210 * Flags for mkjournal 211 */ 212 #define EXT2_MKJOURNAL_V1_SUPER 0x0000001 /* create V1 superblock (deprecated) */ 213 #define EXT2_MKJOURNAL_LAZYINIT 0x0000002 /* don't zero journal inode before use*/ 214 #define EXT2_MKJOURNAL_NO_MNT_CHECK 0x0000004 /* don't check mount status */ 215 216 struct blk_alloc_ctx; 217 struct opaque_ext2_group_desc; 218 219 struct struct_ext2_filsys { 220 errcode_t magic; 221 io_channel io; 222 int flags; 223 char * device_name; 224 struct ext2_super_block * super; 225 unsigned int blocksize; 226 int fragsize; 227 dgrp_t group_desc_count; 228 unsigned long desc_blocks; 229 struct opaque_ext2_group_desc * group_desc; 230 unsigned int inode_blocks_per_group; 231 ext2fs_inode_bitmap inode_map; 232 ext2fs_block_bitmap block_map; 233 /* XXX FIXME-64: not 64-bit safe, but not used? */ 234 errcode_t (*get_blocks)(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 235 errcode_t (*check_directory)(ext2_filsys fs, ext2_ino_t ino); 236 errcode_t (*write_bitmaps)(ext2_filsys fs); 237 errcode_t (*read_inode)(ext2_filsys fs, ext2_ino_t ino, 238 struct ext2_inode *inode); 239 errcode_t (*write_inode)(ext2_filsys fs, ext2_ino_t ino, 240 struct ext2_inode *inode); 241 ext2_badblocks_list badblocks; 242 ext2_dblist dblist; 243 __u32 stride; /* for mke2fs */ 244 struct ext2_super_block * orig_super; 245 struct ext2_image_hdr * image_header; 246 __u32 umask; 247 time_t now; 248 int cluster_ratio_bits; 249 __u16 default_bitmap_type; 250 __u16 pad; 251 /* 252 * Reserved for future expansion 253 */ 254 __u32 reserved[5]; 255 256 /* 257 * Reserved for the use of the calling application. 258 */ 259 void * priv_data; 260 261 /* 262 * Inode cache 263 */ 264 struct ext2_inode_cache *icache; 265 io_channel image_io; 266 267 /* 268 * More callback functions 269 */ 270 errcode_t (*get_alloc_block)(ext2_filsys fs, blk64_t goal, 271 blk64_t *ret); 272 errcode_t (*get_alloc_block2)(ext2_filsys fs, blk64_t goal, 273 blk64_t *ret, struct blk_alloc_ctx *ctx); 274 void (*block_alloc_stats)(ext2_filsys fs, blk64_t blk, int inuse); 275 276 /* 277 * Buffers for Multiple mount protection(MMP) block. 278 */ 279 void *mmp_buf; 280 void *mmp_cmp; 281 int mmp_fd; 282 283 /* 284 * Time at which e2fsck last updated the MMP block. 285 */ 286 long mmp_last_written; 287 288 /* progress operation functions */ 289 struct ext2fs_progress_ops *progress_ops; 290 291 /* Precomputed FS UUID checksum for seeding other checksums */ 292 __u32 csum_seed; 293 294 io_channel journal_io; 295 char *journal_name; 296 297 /* New block range allocation hooks */ 298 errcode_t (*new_range)(ext2_filsys fs, int flags, blk64_t goal, 299 blk64_t len, blk64_t *pblk, blk64_t *plen); 300 void (*block_alloc_stats_range)(ext2_filsys fs, blk64_t blk, blk_t num, 301 int inuse); 302 303 /* hashmap for SHA of data blocks */ 304 struct ext2fs_hashmap* block_sha_map; 305 }; 306 307 #if EXT2_FLAT_INCLUDES 308 #include "e2_bitops.h" 309 #else 310 #include <ext2fs/bitops.h> 311 #endif 312 313 /* 314 * 64-bit bitmap backend types 315 */ 316 #define EXT2FS_BMAP64_BITARRAY 1 317 #define EXT2FS_BMAP64_RBTREE 2 318 #define EXT2FS_BMAP64_AUTODIR 3 319 320 /* 321 * Return flags for the block iterator functions 322 */ 323 #define BLOCK_CHANGED 1 324 #define BLOCK_ABORT 2 325 #define BLOCK_ERROR 4 326 #define BLOCK_INLINE_DATA_CHANGED 8 327 328 /* 329 * Block interate flags 330 * 331 * BLOCK_FLAG_APPEND, or BLOCK_FLAG_HOLE, indicates that the interator 332 * function should be called on blocks where the block number is zero. 333 * This is used by ext2fs_expand_dir() to be able to add a new block 334 * to an inode. It can also be used for programs that want to be able 335 * to deal with files that contain "holes". 336 * 337 * BLOCK_FLAG_DEPTH_TRAVERSE indicates that the iterator function for 338 * the indirect, doubly indirect, etc. blocks should be called after 339 * all of the blocks contained in the indirect blocks are processed. 340 * This is useful if you are going to be deallocating blocks from an 341 * inode. 342 * 343 * BLOCK_FLAG_DATA_ONLY indicates that the iterator function should be 344 * called for data blocks only. 345 * 346 * BLOCK_FLAG_READ_ONLY is a promise by the caller that it will not 347 * modify returned block number. 348 * 349 * BLOCK_FLAG_NO_LARGE is for internal use only. It informs 350 * ext2fs_block_iterate2 that large files won't be accepted. 351 */ 352 #define BLOCK_FLAG_APPEND 1 353 #define BLOCK_FLAG_HOLE 1 354 #define BLOCK_FLAG_DEPTH_TRAVERSE 2 355 #define BLOCK_FLAG_DATA_ONLY 4 356 #define BLOCK_FLAG_READ_ONLY 8 357 358 #define BLOCK_FLAG_NO_LARGE 0x1000 359 360 /* 361 * Magic "block count" return values for the block iterator function. 362 */ 363 #define BLOCK_COUNT_IND (-1) 364 #define BLOCK_COUNT_DIND (-2) 365 #define BLOCK_COUNT_TIND (-3) 366 #define BLOCK_COUNT_TRANSLATOR (-4) 367 368 #define BLOCK_ALLOC_UNKNOWN 0 369 #define BLOCK_ALLOC_DATA 1 370 #define BLOCK_ALLOC_METADATA 2 371 372 struct blk_alloc_ctx { 373 ext2_ino_t ino; 374 struct ext2_inode *inode; 375 blk64_t lblk; 376 int flags; 377 }; 378 379 /* 380 * Flags for ext2fs_move_blocks 381 */ 382 #if 0 383 #define EXT2_BMOVE_GET_DBLIST 0x0001 384 #define EXT2_BMOVE_DEBUG 0x0002 385 #endif 386 387 /* 388 * Generic (non-filesystem layout specific) extents structure 389 */ 390 391 #define EXT2_EXTENT_FLAGS_LEAF 0x0001 392 #define EXT2_EXTENT_FLAGS_UNINIT 0x0002 393 #define EXT2_EXTENT_FLAGS_SECOND_VISIT 0x0004 394 395 struct ext2fs_extent { 396 blk64_t e_pblk; /* first physical block */ 397 blk64_t e_lblk; /* first logical block extent covers */ 398 __u32 e_len; /* number of blocks covered by extent */ 399 __u32 e_flags; /* extent flags */ 400 }; 401 402 typedef struct ext2_extent_handle *ext2_extent_handle_t; 403 typedef struct ext2_extent_path *ext2_extent_path_t; 404 405 /* 406 * Flags used by ext2fs_extent_get() 407 */ 408 #define EXT2_EXTENT_CURRENT 0x0000 409 #define EXT2_EXTENT_MOVE_MASK 0x000F 410 #define EXT2_EXTENT_ROOT 0x0001 411 #define EXT2_EXTENT_LAST_LEAF 0x0002 412 #define EXT2_EXTENT_FIRST_SIB 0x0003 413 #define EXT2_EXTENT_LAST_SIB 0x0004 414 #define EXT2_EXTENT_NEXT_SIB 0x0005 415 #define EXT2_EXTENT_PREV_SIB 0x0006 416 #define EXT2_EXTENT_NEXT_LEAF 0x0007 417 #define EXT2_EXTENT_PREV_LEAF 0x0008 418 #define EXT2_EXTENT_NEXT 0x0009 419 #define EXT2_EXTENT_PREV 0x000A 420 #define EXT2_EXTENT_UP 0x000B 421 #define EXT2_EXTENT_DOWN 0x000C 422 #define EXT2_EXTENT_DOWN_AND_LAST 0x000D 423 424 /* 425 * Flags used by ext2fs_extent_insert() 426 */ 427 #define EXT2_EXTENT_INSERT_AFTER 0x0001 /* insert after handle loc'n */ 428 #define EXT2_EXTENT_INSERT_NOSPLIT 0x0002 /* insert may not cause split */ 429 430 /* 431 * Flags used by ext2fs_extent_delete() 432 */ 433 #define EXT2_EXTENT_DELETE_KEEP_EMPTY 0x001 /* keep node if last extent gone */ 434 435 /* 436 * Flags used by ext2fs_extent_set_bmap() 437 */ 438 #define EXT2_EXTENT_SET_BMAP_UNINIT 0x0001 439 440 /* 441 * Data structure returned by ext2fs_extent_get_info() 442 */ 443 struct ext2_extent_info { 444 int curr_entry; 445 int curr_level; 446 int num_entries; 447 int max_entries; 448 int max_depth; 449 int bytes_avail; 450 blk64_t max_lblk; 451 blk64_t max_pblk; 452 __u32 max_len; 453 __u32 max_uninit_len; 454 }; 455 456 /* 457 * Flags for directory block reading and writing functions 458 */ 459 #define EXT2_DIRBLOCK_V2_STRUCT 0x0001 460 461 /* 462 * Return flags for the directory iterator functions 463 */ 464 #define DIRENT_CHANGED 1 465 #define DIRENT_ABORT 2 466 #define DIRENT_ERROR 3 467 468 /* 469 * Directory iterator flags 470 */ 471 472 #define DIRENT_FLAG_INCLUDE_EMPTY 1 473 #define DIRENT_FLAG_INCLUDE_REMOVED 2 474 #define DIRENT_FLAG_INCLUDE_CSUM 4 475 #define DIRENT_FLAG_INCLUDE_INLINE_DATA 8 476 477 #define DIRENT_DOT_FILE 1 478 #define DIRENT_DOT_DOT_FILE 2 479 #define DIRENT_OTHER_FILE 3 480 #define DIRENT_DELETED_FILE 4 481 #define DIRENT_CHECKSUM 5 482 483 /* 484 * Inode scan definitions 485 */ 486 typedef struct ext2_struct_inode_scan *ext2_inode_scan; 487 488 /* 489 * ext2fs_scan flags 490 */ 491 #define EXT2_SF_CHK_BADBLOCKS 0x0001 492 #define EXT2_SF_BAD_INODE_BLK 0x0002 493 #define EXT2_SF_BAD_EXTRA_BYTES 0x0004 494 #define EXT2_SF_SKIP_MISSING_ITABLE 0x0008 495 #define EXT2_SF_DO_LAZY 0x0010 496 #define EXT2_SF_WARN_GARBAGE_INODES 0x0020 497 498 /* 499 * ext2fs_check_if_mounted flags 500 */ 501 #define EXT2_MF_MOUNTED 1 502 #define EXT2_MF_ISROOT 2 503 #define EXT2_MF_READONLY 4 504 #define EXT2_MF_SWAP 8 505 #define EXT2_MF_BUSY 16 506 507 /* 508 * Ext2/linux mode flags. We define them here so that we don't need 509 * to depend on the OS's sys/stat.h, since we may be compiling on a 510 * non-Linux system. 511 */ 512 #define LINUX_S_IFMT 00170000 513 #define LINUX_S_IFSOCK 0140000 514 #define LINUX_S_IFLNK 0120000 515 #define LINUX_S_IFREG 0100000 516 #define LINUX_S_IFBLK 0060000 517 #define LINUX_S_IFDIR 0040000 518 #define LINUX_S_IFCHR 0020000 519 #define LINUX_S_IFIFO 0010000 520 #define LINUX_S_ISUID 0004000 521 #define LINUX_S_ISGID 0002000 522 #define LINUX_S_ISVTX 0001000 523 524 #define LINUX_S_IRWXU 00700 525 #define LINUX_S_IRUSR 00400 526 #define LINUX_S_IWUSR 00200 527 #define LINUX_S_IXUSR 00100 528 529 #define LINUX_S_IRWXG 00070 530 #define LINUX_S_IRGRP 00040 531 #define LINUX_S_IWGRP 00020 532 #define LINUX_S_IXGRP 00010 533 534 #define LINUX_S_IRWXO 00007 535 #define LINUX_S_IROTH 00004 536 #define LINUX_S_IWOTH 00002 537 #define LINUX_S_IXOTH 00001 538 539 #define LINUX_S_ISLNK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFLNK) 540 #define LINUX_S_ISREG(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFREG) 541 #define LINUX_S_ISDIR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFDIR) 542 #define LINUX_S_ISCHR(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFCHR) 543 #define LINUX_S_ISBLK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFBLK) 544 #define LINUX_S_ISFIFO(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFIFO) 545 #define LINUX_S_ISSOCK(m) (((m) & LINUX_S_IFMT) == LINUX_S_IFSOCK) 546 547 /* 548 * ext2 size of an inode 549 */ 550 #define EXT2_I_SIZE(i) ((i)->i_size | ((__u64) (i)->i_size_high << 32)) 551 552 /* 553 * ext2_icount_t abstraction 554 */ 555 #define EXT2_ICOUNT_OPT_INCREMENT 0x01 556 #define EXT2_ICOUNT_OPT_FULLMAP 0x02 557 558 typedef struct ext2_icount *ext2_icount_t; 559 560 /* 561 * Flags for ext2fs_bmap 562 */ 563 #define BMAP_ALLOC 0x0001 564 #define BMAP_SET 0x0002 565 #define BMAP_UNINIT 0x0004 566 #define BMAP_ZERO 0x0008 567 568 /* 569 * Returned flags from ext2fs_bmap 570 */ 571 #define BMAP_RET_UNINIT 0x0001 572 573 /* 574 * Flags for imager.c functions 575 */ 576 #define IMAGER_FLAG_INODEMAP 1 577 #define IMAGER_FLAG_SPARSEWRITE 2 578 579 /* 580 * For checking structure magic numbers... 581 */ 582 583 #define EXT2_CHECK_MAGIC(struct, code) \ 584 if ((struct)->magic != (code)) return (code) 585 586 /* 587 * Features supported by this version of the library 588 */ 589 #define EXT2_LIB_FEATURE_COMPAT_SUPP (EXT2_FEATURE_COMPAT_DIR_PREALLOC|\ 590 EXT2_FEATURE_COMPAT_IMAGIC_INODES|\ 591 EXT3_FEATURE_COMPAT_HAS_JOURNAL|\ 592 EXT2_FEATURE_COMPAT_RESIZE_INODE|\ 593 EXT2_FEATURE_COMPAT_DIR_INDEX|\ 594 EXT2_FEATURE_COMPAT_EXT_ATTR|\ 595 EXT4_FEATURE_COMPAT_SPARSE_SUPER2) 596 597 #ifdef CONFIG_MMP 598 #define EXT4_LIB_INCOMPAT_MMP EXT4_FEATURE_INCOMPAT_MMP 599 #else 600 #define EXT4_LIB_INCOMPAT_MMP (0) 601 #endif 602 603 #define EXT2_LIB_FEATURE_INCOMPAT_SUPP (EXT2_FEATURE_INCOMPAT_FILETYPE|\ 604 EXT3_FEATURE_INCOMPAT_JOURNAL_DEV|\ 605 EXT2_FEATURE_INCOMPAT_META_BG|\ 606 EXT3_FEATURE_INCOMPAT_RECOVER|\ 607 EXT3_FEATURE_INCOMPAT_EXTENTS|\ 608 EXT4_FEATURE_INCOMPAT_FLEX_BG|\ 609 EXT4_FEATURE_INCOMPAT_EA_INODE|\ 610 EXT4_LIB_INCOMPAT_MMP|\ 611 EXT4_FEATURE_INCOMPAT_64BIT|\ 612 EXT4_FEATURE_INCOMPAT_INLINE_DATA|\ 613 EXT4_FEATURE_INCOMPAT_ENCRYPT|\ 614 EXT4_FEATURE_INCOMPAT_CSUM_SEED|\ 615 EXT4_FEATURE_INCOMPAT_LARGEDIR) 616 617 #define EXT2_LIB_FEATURE_RO_COMPAT_SUPP (EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER|\ 618 EXT4_FEATURE_RO_COMPAT_HUGE_FILE|\ 619 EXT2_FEATURE_RO_COMPAT_LARGE_FILE|\ 620 EXT4_FEATURE_RO_COMPAT_DIR_NLINK|\ 621 EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE|\ 622 EXT4_FEATURE_RO_COMPAT_GDT_CSUM|\ 623 EXT4_FEATURE_RO_COMPAT_BIGALLOC|\ 624 EXT4_FEATURE_RO_COMPAT_QUOTA|\ 625 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM|\ 626 EXT4_FEATURE_RO_COMPAT_READONLY |\ 627 EXT4_FEATURE_RO_COMPAT_PROJECT |\ 628 EXT4_FEATURE_RO_COMPAT_SHARED_BLOCKS |\ 629 EXT4_FEATURE_RO_COMPAT_VERITY) 630 631 /* 632 * These features are only allowed if EXT2_FLAG_SOFTSUPP_FEATURES is passed 633 * to ext2fs_openfs() 634 */ 635 #define EXT2_LIB_SOFTSUPP_INCOMPAT (0) 636 #define EXT2_LIB_SOFTSUPP_RO_COMPAT (EXT4_FEATURE_RO_COMPAT_REPLICA) 637 638 639 /* Translate a block number to a cluster number */ 640 #define EXT2FS_CLUSTER_RATIO(fs) (1 << (fs)->cluster_ratio_bits) 641 #define EXT2FS_CLUSTER_MASK(fs) (EXT2FS_CLUSTER_RATIO(fs) - 1) 642 #define EXT2FS_B2C(fs, blk) ((blk) >> (fs)->cluster_ratio_bits) 643 /* Translate a cluster number to a block number */ 644 #define EXT2FS_C2B(fs, cluster) ((cluster) << (fs)->cluster_ratio_bits) 645 /* Translate # of blks to # of clusters */ 646 #define EXT2FS_NUM_B2C(fs, blks) (((blks) + EXT2FS_CLUSTER_MASK(fs)) >> \ 647 (fs)->cluster_ratio_bits) 648 649 #if defined(HAVE_FSTAT64) && !defined(__OSX_AVAILABLE_BUT_DEPRECATED) 650 typedef struct stat64 ext2fs_struct_stat; 651 #else 652 typedef struct stat ext2fs_struct_stat; 653 #endif 654 655 /* 656 * For ext2fs_close2() and ext2fs_flush2(), this flag allows you to 657 * avoid the fsync call. 658 */ 659 #define EXT2_FLAG_FLUSH_NO_SYNC 1 660 661 /* 662 * Modify and iterate extended attributes 663 */ 664 struct ext2_xattr_handle; 665 #define XATTR_ABORT 1 666 #define XATTR_CHANGED 2 667 668 /* 669 * function prototypes 670 */ 671 static inline int ext2fs_has_group_desc_csum(ext2_filsys fs) 672 { 673 return ext2fs_has_feature_metadata_csum(fs->super) || 674 ext2fs_has_feature_gdt_csum(fs->super); 675 } 676 677 /* The LARGE_FILE feature should be set if we have stored files 2GB+ in size */ 678 static inline int ext2fs_needs_large_file_feature(unsigned long long file_size) 679 { 680 return file_size >= 0x80000000ULL; 681 } 682 683 /* alloc.c */ 684 extern void ext2fs_clear_block_uninit(ext2_filsys fs, dgrp_t group); 685 extern errcode_t ext2fs_new_inode(ext2_filsys fs, ext2_ino_t dir, int mode, 686 ext2fs_inode_bitmap map, ext2_ino_t *ret); 687 extern errcode_t ext2fs_new_block(ext2_filsys fs, blk_t goal, 688 ext2fs_block_bitmap map, blk_t *ret); 689 extern errcode_t ext2fs_new_block2(ext2_filsys fs, blk64_t goal, 690 ext2fs_block_bitmap map, blk64_t *ret); 691 extern errcode_t ext2fs_new_block3(ext2_filsys fs, blk64_t goal, 692 ext2fs_block_bitmap map, blk64_t *ret, 693 struct blk_alloc_ctx *ctx); 694 extern errcode_t ext2fs_get_free_blocks(ext2_filsys fs, blk_t start, 695 blk_t finish, int num, 696 ext2fs_block_bitmap map, 697 blk_t *ret); 698 extern errcode_t ext2fs_get_free_blocks2(ext2_filsys fs, blk64_t start, 699 blk64_t finish, int num, 700 ext2fs_block_bitmap map, 701 blk64_t *ret); 702 extern errcode_t ext2fs_alloc_block(ext2_filsys fs, blk_t goal, 703 char *block_buf, blk_t *ret); 704 extern errcode_t ext2fs_alloc_block2(ext2_filsys fs, blk64_t goal, 705 char *block_buf, blk64_t *ret); 706 extern errcode_t ext2fs_alloc_block3(ext2_filsys fs, blk64_t goal, 707 char *block_buf, blk64_t *ret, 708 struct blk_alloc_ctx *ctx); 709 710 extern void ext2fs_set_alloc_block_callback(ext2_filsys fs, 711 errcode_t (*func)(ext2_filsys fs, 712 blk64_t goal, 713 blk64_t *ret), 714 errcode_t (**old)(ext2_filsys fs, 715 blk64_t goal, 716 blk64_t *ret)); 717 blk64_t ext2fs_find_inode_goal(ext2_filsys fs, ext2_ino_t ino, 718 struct ext2_inode *inode, blk64_t lblk); 719 extern void ext2fs_set_new_range_callback(ext2_filsys fs, 720 errcode_t (*func)(ext2_filsys fs, int flags, blk64_t goal, 721 blk64_t len, blk64_t *pblk, blk64_t *plen), 722 errcode_t (**old)(ext2_filsys fs, int flags, blk64_t goal, 723 blk64_t len, blk64_t *pblk, blk64_t *plen)); 724 extern void ext2fs_set_block_alloc_stats_range_callback(ext2_filsys fs, 725 void (*func)(ext2_filsys fs, blk64_t blk, 726 blk_t num, int inuse), 727 void (**old)(ext2_filsys fs, blk64_t blk, 728 blk_t num, int inuse)); 729 #define EXT2_NEWRANGE_FIXED_GOAL (0x1) 730 #define EXT2_NEWRANGE_MIN_LENGTH (0x2) 731 #define EXT2_NEWRANGE_ALL_FLAGS (0x3) 732 errcode_t ext2fs_new_range(ext2_filsys fs, int flags, blk64_t goal, 733 blk64_t len, ext2fs_block_bitmap map, blk64_t *pblk, 734 blk64_t *plen); 735 #define EXT2_ALLOCRANGE_FIXED_GOAL (0x1) 736 #define EXT2_ALLOCRANGE_ZERO_BLOCKS (0x2) 737 #define EXT2_ALLOCRANGE_ALL_FLAGS (0x3) 738 errcode_t ext2fs_alloc_range(ext2_filsys fs, int flags, blk64_t goal, 739 blk_t len, blk64_t *ret); 740 741 /* alloc_sb.c */ 742 extern int ext2fs_reserve_super_and_bgd(ext2_filsys fs, 743 dgrp_t group, 744 ext2fs_block_bitmap bmap); 745 extern void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs, 746 void (*func)(ext2_filsys fs, 747 blk64_t blk, 748 int inuse), 749 void (**old)(ext2_filsys fs, 750 blk64_t blk, 751 int inuse)); 752 753 /* alloc_stats.c */ 754 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse); 755 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino, 756 int inuse, int isdir); 757 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse); 758 void ext2fs_block_alloc_stats2(ext2_filsys fs, blk64_t blk, int inuse); 759 void ext2fs_block_alloc_stats_range(ext2_filsys fs, blk64_t blk, 760 blk_t num, int inuse); 761 762 /* alloc_tables.c */ 763 extern errcode_t ext2fs_allocate_tables(ext2_filsys fs); 764 extern errcode_t ext2fs_allocate_group_table(ext2_filsys fs, dgrp_t group, 765 ext2fs_block_bitmap bmap); 766 767 /* badblocks.c */ 768 extern errcode_t ext2fs_u32_list_create(ext2_u32_list *ret, int size); 769 extern errcode_t ext2fs_u32_list_add(ext2_u32_list bb, __u32 blk); 770 extern int ext2fs_u32_list_find(ext2_u32_list bb, __u32 blk); 771 extern int ext2fs_u32_list_test(ext2_u32_list bb, blk_t blk); 772 extern errcode_t ext2fs_u32_list_iterate_begin(ext2_u32_list bb, 773 ext2_u32_iterate *ret); 774 extern int ext2fs_u32_list_iterate(ext2_u32_iterate iter, blk_t *blk); 775 extern void ext2fs_u32_list_iterate_end(ext2_u32_iterate iter); 776 extern errcode_t ext2fs_u32_copy(ext2_u32_list src, ext2_u32_list *dest); 777 extern int ext2fs_u32_list_equal(ext2_u32_list bb1, ext2_u32_list bb2); 778 779 extern errcode_t ext2fs_badblocks_list_create(ext2_badblocks_list *ret, 780 int size); 781 extern errcode_t ext2fs_badblocks_list_add(ext2_badblocks_list bb, 782 blk_t blk); 783 extern int ext2fs_badblocks_list_test(ext2_badblocks_list bb, 784 blk_t blk); 785 extern int ext2fs_u32_list_del(ext2_u32_list bb, __u32 blk); 786 extern void ext2fs_badblocks_list_del(ext2_u32_list bb, __u32 blk); 787 extern errcode_t 788 ext2fs_badblocks_list_iterate_begin(ext2_badblocks_list bb, 789 ext2_badblocks_iterate *ret); 790 extern int ext2fs_badblocks_list_iterate(ext2_badblocks_iterate iter, 791 blk_t *blk); 792 extern void ext2fs_badblocks_list_iterate_end(ext2_badblocks_iterate iter); 793 extern errcode_t ext2fs_badblocks_copy(ext2_badblocks_list src, 794 ext2_badblocks_list *dest); 795 extern int ext2fs_badblocks_equal(ext2_badblocks_list bb1, 796 ext2_badblocks_list bb2); 797 extern int ext2fs_u32_list_count(ext2_u32_list bb); 798 799 /* bb_compat */ 800 extern errcode_t badblocks_list_create(badblocks_list *ret, int size); 801 extern errcode_t badblocks_list_add(badblocks_list bb, blk_t blk); 802 extern int badblocks_list_test(badblocks_list bb, blk_t blk); 803 extern errcode_t badblocks_list_iterate_begin(badblocks_list bb, 804 badblocks_iterate *ret); 805 extern int badblocks_list_iterate(badblocks_iterate iter, blk_t *blk); 806 extern void badblocks_list_iterate_end(badblocks_iterate iter); 807 extern void badblocks_list_free(badblocks_list bb); 808 809 /* bb_inode.c */ 810 extern errcode_t ext2fs_update_bb_inode(ext2_filsys fs, 811 ext2_badblocks_list bb_list); 812 813 /* bitmaps.c */ 814 extern void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap); 815 extern void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap); 816 extern errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src, 817 ext2fs_generic_bitmap *dest); 818 extern errcode_t ext2fs_write_inode_bitmap(ext2_filsys fs); 819 extern errcode_t ext2fs_write_block_bitmap (ext2_filsys fs); 820 extern errcode_t ext2fs_read_inode_bitmap (ext2_filsys fs); 821 extern errcode_t ext2fs_read_block_bitmap(ext2_filsys fs); 822 extern errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs, 823 const char *descr, 824 ext2fs_block_bitmap *ret); 825 extern errcode_t ext2fs_allocate_subcluster_bitmap(ext2_filsys fs, 826 const char *descr, 827 ext2fs_block_bitmap *ret); 828 extern int ext2fs_get_bitmap_granularity(ext2fs_block_bitmap bitmap); 829 extern errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs, 830 const char *descr, 831 ext2fs_inode_bitmap *ret); 832 extern errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap, 833 ext2_ino_t end, ext2_ino_t *oend); 834 extern errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap, 835 blk_t end, blk_t *oend); 836 extern errcode_t ext2fs_fudge_block_bitmap_end2(ext2fs_block_bitmap bitmap, 837 blk64_t end, blk64_t *oend); 838 extern void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap); 839 extern void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap); 840 extern errcode_t ext2fs_read_bitmaps(ext2_filsys fs); 841 extern errcode_t ext2fs_write_bitmaps(ext2_filsys fs); 842 extern errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end, 843 ext2fs_inode_bitmap bmap); 844 extern errcode_t ext2fs_resize_inode_bitmap2(__u64 new_end, 845 __u64 new_real_end, 846 ext2fs_inode_bitmap bmap); 847 extern errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end, 848 ext2fs_block_bitmap bmap); 849 extern errcode_t ext2fs_resize_block_bitmap2(__u64 new_end, 850 __u64 new_real_end, 851 ext2fs_block_bitmap bmap); 852 extern errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1, 853 ext2fs_block_bitmap bm2); 854 extern errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1, 855 ext2fs_inode_bitmap bm2); 856 extern errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap, 857 ext2_ino_t start, unsigned int num, 858 void *in); 859 extern errcode_t ext2fs_set_inode_bitmap_range2(ext2fs_inode_bitmap bmap, 860 __u64 start, size_t num, 861 void *in); 862 extern errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap, 863 ext2_ino_t start, unsigned int num, 864 void *out); 865 extern errcode_t ext2fs_get_inode_bitmap_range2(ext2fs_inode_bitmap bmap, 866 __u64 start, size_t num, 867 void *out); 868 extern errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap, 869 blk_t start, unsigned int num, 870 void *in); 871 extern errcode_t ext2fs_set_block_bitmap_range2(ext2fs_block_bitmap bmap, 872 blk64_t start, size_t num, 873 void *in); 874 extern errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap, 875 blk_t start, unsigned int num, 876 void *out); 877 extern errcode_t ext2fs_get_block_bitmap_range2(ext2fs_block_bitmap bmap, 878 blk64_t start, size_t num, 879 void *out); 880 881 /* blknum.c */ 882 extern __u32 ext2fs_inode_bitmap_checksum(ext2_filsys fs, dgrp_t group); 883 extern __u32 ext2fs_block_bitmap_checksum(ext2_filsys fs, dgrp_t group); 884 extern dgrp_t ext2fs_group_of_blk2(ext2_filsys fs, blk64_t); 885 extern blk64_t ext2fs_group_first_block2(ext2_filsys fs, dgrp_t group); 886 extern blk64_t ext2fs_group_last_block2(ext2_filsys fs, dgrp_t group); 887 extern int ext2fs_group_blocks_count(ext2_filsys fs, dgrp_t group); 888 extern blk64_t ext2fs_inode_data_blocks2(ext2_filsys fs, 889 struct ext2_inode *inode); 890 extern blk64_t ext2fs_inode_i_blocks(ext2_filsys fs, 891 struct ext2_inode *inode); 892 extern blk64_t ext2fs_blocks_count(struct ext2_super_block *super); 893 extern void ext2fs_blocks_count_set(struct ext2_super_block *super, 894 blk64_t blk); 895 extern void ext2fs_blocks_count_add(struct ext2_super_block *super, 896 blk64_t blk); 897 extern blk64_t ext2fs_r_blocks_count(struct ext2_super_block *super); 898 extern void ext2fs_r_blocks_count_set(struct ext2_super_block *super, 899 blk64_t blk); 900 extern void ext2fs_r_blocks_count_add(struct ext2_super_block *super, 901 blk64_t blk); 902 extern blk64_t ext2fs_free_blocks_count(struct ext2_super_block *super); 903 extern void ext2fs_free_blocks_count_set(struct ext2_super_block *super, 904 blk64_t blk); 905 extern void ext2fs_free_blocks_count_add(struct ext2_super_block *super, 906 blk64_t blk); 907 /* Block group descriptor accessor functions */ 908 extern struct ext2_group_desc *ext2fs_group_desc(ext2_filsys fs, 909 struct opaque_ext2_group_desc *gdp, 910 dgrp_t group); 911 extern blk64_t ext2fs_block_bitmap_csum(ext2_filsys fs, dgrp_t group); 912 extern blk64_t ext2fs_block_bitmap_loc(ext2_filsys fs, dgrp_t group); 913 extern void ext2fs_block_bitmap_loc_set(ext2_filsys fs, dgrp_t group, 914 blk64_t blk); 915 extern __u32 ext2fs_inode_bitmap_csum(ext2_filsys fs, dgrp_t group); 916 extern blk64_t ext2fs_inode_bitmap_loc(ext2_filsys fs, dgrp_t group); 917 extern void ext2fs_inode_bitmap_loc_set(ext2_filsys fs, dgrp_t group, 918 blk64_t blk); 919 extern blk64_t ext2fs_inode_table_loc(ext2_filsys fs, dgrp_t group); 920 extern void ext2fs_inode_table_loc_set(ext2_filsys fs, dgrp_t group, 921 blk64_t blk); 922 extern __u32 ext2fs_bg_free_blocks_count(ext2_filsys fs, dgrp_t group); 923 extern void ext2fs_bg_free_blocks_count_set(ext2_filsys fs, dgrp_t group, 924 __u32 n); 925 extern __u32 ext2fs_bg_free_inodes_count(ext2_filsys fs, dgrp_t group); 926 extern void ext2fs_bg_free_inodes_count_set(ext2_filsys fs, dgrp_t group, 927 __u32 n); 928 extern __u32 ext2fs_bg_used_dirs_count(ext2_filsys fs, dgrp_t group); 929 extern void ext2fs_bg_used_dirs_count_set(ext2_filsys fs, dgrp_t group, 930 __u32 n); 931 extern __u32 ext2fs_bg_itable_unused(ext2_filsys fs, dgrp_t group); 932 extern void ext2fs_bg_itable_unused_set(ext2_filsys fs, dgrp_t group, 933 __u32 n); 934 extern __u16 ext2fs_bg_flags(ext2_filsys fs, dgrp_t group); 935 extern void ext2fs_bg_flags_zap(ext2_filsys fs, dgrp_t group); 936 extern int ext2fs_bg_flags_test(ext2_filsys fs, dgrp_t group, __u16 bg_flag); 937 extern void ext2fs_bg_flags_set(ext2_filsys fs, dgrp_t group, __u16 bg_flags); 938 extern void ext2fs_bg_flags_clear(ext2_filsys fs, dgrp_t group, __u16 bg_flags); 939 extern __u16 ext2fs_bg_checksum(ext2_filsys fs, dgrp_t group); 940 extern void ext2fs_bg_checksum_set(ext2_filsys fs, dgrp_t group, __u16 checksum); 941 extern blk64_t ext2fs_file_acl_block(ext2_filsys fs, 942 const struct ext2_inode *inode); 943 extern void ext2fs_file_acl_block_set(ext2_filsys fs, 944 struct ext2_inode *inode, blk64_t blk); 945 extern errcode_t ext2fs_inode_size_set(ext2_filsys fs, struct ext2_inode *inode, 946 ext2_off64_t size); 947 948 /* block.c */ 949 extern errcode_t ext2fs_block_iterate(ext2_filsys fs, 950 ext2_ino_t ino, 951 int flags, 952 char *block_buf, 953 int (*func)(ext2_filsys fs, 954 blk_t *blocknr, 955 int blockcnt, 956 void *priv_data), 957 void *priv_data); 958 errcode_t ext2fs_block_iterate2(ext2_filsys fs, 959 ext2_ino_t ino, 960 int flags, 961 char *block_buf, 962 int (*func)(ext2_filsys fs, 963 blk_t *blocknr, 964 e2_blkcnt_t blockcnt, 965 blk_t ref_blk, 966 int ref_offset, 967 void *priv_data), 968 void *priv_data); 969 errcode_t ext2fs_block_iterate3(ext2_filsys fs, 970 ext2_ino_t ino, 971 int flags, 972 char *block_buf, 973 int (*func)(ext2_filsys fs, 974 blk64_t *blocknr, 975 e2_blkcnt_t blockcnt, 976 blk64_t ref_blk, 977 int ref_offset, 978 void *priv_data), 979 void *priv_data); 980 981 /* bmap.c */ 982 extern errcode_t ext2fs_bmap(ext2_filsys fs, ext2_ino_t ino, 983 struct ext2_inode *inode, 984 char *block_buf, int bmap_flags, 985 blk_t block, blk_t *phys_blk); 986 extern errcode_t ext2fs_bmap2(ext2_filsys fs, ext2_ino_t ino, 987 struct ext2_inode *inode, 988 char *block_buf, int bmap_flags, blk64_t block, 989 int *ret_flags, blk64_t *phys_blk); 990 errcode_t ext2fs_map_cluster_block(ext2_filsys fs, ext2_ino_t ino, 991 struct ext2_inode *inode, blk64_t lblk, 992 blk64_t *pblk); 993 994 #if 0 995 /* bmove.c */ 996 extern errcode_t ext2fs_move_blocks(ext2_filsys fs, 997 ext2fs_block_bitmap reserve, 998 ext2fs_block_bitmap alloc_map, 999 int flags); 1000 #endif 1001 1002 /* check_desc.c */ 1003 extern errcode_t ext2fs_check_desc(ext2_filsys fs); 1004 1005 /* closefs.c */ 1006 extern errcode_t ext2fs_close(ext2_filsys fs); 1007 extern errcode_t ext2fs_close2(ext2_filsys fs, int flags); 1008 extern errcode_t ext2fs_close_free(ext2_filsys *fs); 1009 extern errcode_t ext2fs_flush(ext2_filsys fs); 1010 extern errcode_t ext2fs_flush2(ext2_filsys fs, int flags); 1011 extern int ext2fs_bg_has_super(ext2_filsys fs, dgrp_t group_block); 1012 extern errcode_t ext2fs_super_and_bgd_loc2(ext2_filsys fs, 1013 dgrp_t group, 1014 blk64_t *ret_super_blk, 1015 blk64_t *ret_old_desc_blk, 1016 blk64_t *ret_new_desc_blk, 1017 blk_t *ret_used_blks); 1018 extern int ext2fs_super_and_bgd_loc(ext2_filsys fs, 1019 dgrp_t group, 1020 blk_t *ret_super_blk, 1021 blk_t *ret_old_desc_blk, 1022 blk_t *ret_new_desc_blk, 1023 int *ret_meta_bg); 1024 extern void ext2fs_update_dynamic_rev(ext2_filsys fs); 1025 1026 /* crc32c.c */ 1027 extern __u32 ext2fs_crc32_be(__u32 crc, unsigned char const *p, size_t len); 1028 extern __u32 ext2fs_crc32c_le(__u32 crc, unsigned char const *p, size_t len); 1029 1030 /* csum.c */ 1031 extern void ext2fs_init_csum_seed(ext2_filsys fs); 1032 extern errcode_t ext2fs_mmp_csum_set(ext2_filsys fs, struct mmp_struct *mmp); 1033 extern int ext2fs_mmp_csum_verify(ext2_filsys, struct mmp_struct *mmp); 1034 extern int ext2fs_verify_csum_type(ext2_filsys fs, struct ext2_super_block *sb); 1035 extern errcode_t ext2fs_superblock_csum_set(ext2_filsys fs, 1036 struct ext2_super_block *sb); 1037 extern int ext2fs_superblock_csum_verify(ext2_filsys fs, 1038 struct ext2_super_block *sb); 1039 extern errcode_t ext2fs_ext_attr_block_csum_set(ext2_filsys fs, 1040 ext2_ino_t inum, blk64_t block, 1041 struct ext2_ext_attr_header *hdr); 1042 extern int ext2fs_ext_attr_block_csum_verify(ext2_filsys fs, ext2_ino_t inum, 1043 blk64_t block, 1044 struct ext2_ext_attr_header *hdr); 1045 #define EXT2_DIRENT_TAIL(block, blocksize) \ 1046 ((struct ext2_dir_entry_tail *)(((char *)(block)) + \ 1047 (blocksize) - sizeof(struct ext2_dir_entry_tail))) 1048 1049 extern void ext2fs_initialize_dirent_tail(ext2_filsys fs, 1050 struct ext2_dir_entry_tail *t); 1051 extern int ext2fs_dirent_has_tail(ext2_filsys fs, 1052 struct ext2_dir_entry *dirent); 1053 extern int ext2fs_dirent_csum_verify(ext2_filsys fs, ext2_ino_t inum, 1054 struct ext2_dir_entry *dirent); 1055 extern int ext2fs_dir_block_csum_verify(ext2_filsys fs, ext2_ino_t inum, 1056 struct ext2_dir_entry *dirent); 1057 extern errcode_t ext2fs_dir_block_csum_set(ext2_filsys fs, ext2_ino_t inum, 1058 struct ext2_dir_entry *dirent); 1059 extern errcode_t ext2fs_get_dx_countlimit(ext2_filsys fs, 1060 struct ext2_dir_entry *dirent, 1061 struct ext2_dx_countlimit **cc, 1062 int *offset); 1063 extern errcode_t ext2fs_extent_block_csum_set(ext2_filsys fs, 1064 ext2_ino_t inum, 1065 struct ext3_extent_header *eh); 1066 extern int ext2fs_extent_block_csum_verify(ext2_filsys fs, 1067 ext2_ino_t inum, 1068 struct ext3_extent_header *eh); 1069 extern errcode_t ext2fs_block_bitmap_csum_set(ext2_filsys fs, dgrp_t group, 1070 char *bitmap, int size); 1071 extern int ext2fs_block_bitmap_csum_verify(ext2_filsys fs, dgrp_t group, 1072 char *bitmap, int size); 1073 extern errcode_t ext2fs_inode_bitmap_csum_set(ext2_filsys fs, dgrp_t group, 1074 char *bitmap, int size); 1075 extern int ext2fs_inode_bitmap_csum_verify(ext2_filsys fs, dgrp_t group, 1076 char *bitmap, int size); 1077 extern errcode_t ext2fs_inode_csum_set(ext2_filsys fs, ext2_ino_t inum, 1078 struct ext2_inode_large *inode); 1079 extern int ext2fs_inode_csum_verify(ext2_filsys fs, ext2_ino_t inum, 1080 struct ext2_inode_large *inode); 1081 extern void ext2fs_group_desc_csum_set(ext2_filsys fs, dgrp_t group); 1082 extern int ext2fs_group_desc_csum_verify(ext2_filsys fs, dgrp_t group); 1083 extern errcode_t ext2fs_set_gdt_csum(ext2_filsys fs); 1084 extern __u16 ext2fs_group_desc_csum(ext2_filsys fs, dgrp_t group); 1085 1086 /* dblist.c */ 1087 extern errcode_t ext2fs_init_dblist(ext2_filsys fs, ext2_dblist *ret_dblist); 1088 extern errcode_t ext2fs_add_dir_block(ext2_dblist dblist, ext2_ino_t ino, 1089 blk_t blk, int blockcnt); 1090 extern errcode_t ext2fs_add_dir_block2(ext2_dblist dblist, ext2_ino_t ino, 1091 blk64_t blk, e2_blkcnt_t blockcnt); 1092 extern void ext2fs_dblist_sort(ext2_dblist dblist, 1093 EXT2_QSORT_TYPE (*sortfunc)(const void *, 1094 const void *)); 1095 extern void ext2fs_dblist_sort2(ext2_dblist dblist, 1096 EXT2_QSORT_TYPE (*sortfunc)(const void *, 1097 const void *)); 1098 extern errcode_t ext2fs_dblist_iterate(ext2_dblist dblist, 1099 int (*func)(ext2_filsys fs, struct ext2_db_entry *db_info, 1100 void *priv_data), 1101 void *priv_data); 1102 extern errcode_t ext2fs_dblist_iterate2(ext2_dblist dblist, 1103 int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info, 1104 void *priv_data), 1105 void *priv_data); 1106 extern errcode_t ext2fs_dblist_iterate3(ext2_dblist dblist, 1107 int (*func)(ext2_filsys fs, struct ext2_db_entry2 *db_info, 1108 void *priv_data), 1109 unsigned long long start, 1110 unsigned long long count, 1111 void *priv_data); 1112 extern errcode_t ext2fs_set_dir_block(ext2_dblist dblist, ext2_ino_t ino, 1113 blk_t blk, int blockcnt); 1114 extern errcode_t ext2fs_set_dir_block2(ext2_dblist dblist, ext2_ino_t ino, 1115 blk64_t blk, e2_blkcnt_t blockcnt); 1116 extern errcode_t ext2fs_copy_dblist(ext2_dblist src, 1117 ext2_dblist *dest); 1118 extern int ext2fs_dblist_count(ext2_dblist dblist); 1119 extern blk64_t ext2fs_dblist_count2(ext2_dblist dblist); 1120 extern errcode_t ext2fs_dblist_get_last(ext2_dblist dblist, 1121 struct ext2_db_entry **entry); 1122 extern errcode_t ext2fs_dblist_get_last2(ext2_dblist dblist, 1123 struct ext2_db_entry2 **entry); 1124 extern errcode_t ext2fs_dblist_drop_last(ext2_dblist dblist); 1125 1126 /* dblist_dir.c */ 1127 extern errcode_t 1128 ext2fs_dblist_dir_iterate(ext2_dblist dblist, 1129 int flags, 1130 char *block_buf, 1131 int (*func)(ext2_ino_t dir, 1132 int entry, 1133 struct ext2_dir_entry *dirent, 1134 int offset, 1135 int blocksize, 1136 char *buf, 1137 void *priv_data), 1138 void *priv_data); 1139 1140 #if 0 1141 /* digest_encode.c */ 1142 #define EXT2FS_DIGEST_SIZE EXT2FS_SHA256_LENGTH 1143 extern int ext2fs_digest_encode(const char *src, int len, char *dst); 1144 extern int ext2fs_digest_decode(const char *src, int len, char *dst); 1145 #endif 1146 1147 /* dirblock.c */ 1148 extern errcode_t ext2fs_read_dir_block(ext2_filsys fs, blk_t block, 1149 void *buf); 1150 extern errcode_t ext2fs_read_dir_block2(ext2_filsys fs, blk_t block, 1151 void *buf, int flags); 1152 extern errcode_t ext2fs_read_dir_block3(ext2_filsys fs, blk64_t block, 1153 void *buf, int flags); 1154 extern errcode_t ext2fs_read_dir_block4(ext2_filsys fs, blk64_t block, 1155 void *buf, int flags, ext2_ino_t ino); 1156 extern errcode_t ext2fs_write_dir_block(ext2_filsys fs, blk_t block, 1157 void *buf); 1158 extern errcode_t ext2fs_write_dir_block2(ext2_filsys fs, blk_t block, 1159 void *buf, int flags); 1160 extern errcode_t ext2fs_write_dir_block3(ext2_filsys fs, blk64_t block, 1161 void *buf, int flags); 1162 extern errcode_t ext2fs_write_dir_block4(ext2_filsys fs, blk64_t block, 1163 void *buf, int flags, ext2_ino_t ino); 1164 1165 /* dirhash.c */ 1166 extern errcode_t ext2fs_dirhash(int version, const char *name, int len, 1167 const __u32 *seed, 1168 ext2_dirhash_t *ret_hash, 1169 ext2_dirhash_t *ret_minor_hash); 1170 1171 1172 /* dir_iterate.c */ 1173 extern errcode_t ext2fs_get_rec_len(ext2_filsys fs, 1174 struct ext2_dir_entry *dirent, 1175 unsigned int *rec_len); 1176 extern errcode_t ext2fs_set_rec_len(ext2_filsys fs, 1177 unsigned int len, 1178 struct ext2_dir_entry *dirent); 1179 extern errcode_t ext2fs_dir_iterate(ext2_filsys fs, 1180 ext2_ino_t dir, 1181 int flags, 1182 char *block_buf, 1183 int (*func)(struct ext2_dir_entry *dirent, 1184 int offset, 1185 int blocksize, 1186 char *buf, 1187 void *priv_data), 1188 void *priv_data); 1189 extern errcode_t ext2fs_dir_iterate2(ext2_filsys fs, 1190 ext2_ino_t dir, 1191 int flags, 1192 char *block_buf, 1193 int (*func)(ext2_ino_t dir, 1194 int entry, 1195 struct ext2_dir_entry *dirent, 1196 int offset, 1197 int blocksize, 1198 char *buf, 1199 void *priv_data), 1200 void *priv_data); 1201 1202 /* dupfs.c */ 1203 extern errcode_t ext2fs_dup_handle(ext2_filsys src, ext2_filsys *dest); 1204 1205 /* expanddir.c */ 1206 extern errcode_t ext2fs_expand_dir(ext2_filsys fs, ext2_ino_t dir); 1207 1208 /* ext_attr.c */ 1209 extern __u32 ext2fs_ext_attr_hash_entry(struct ext2_ext_attr_entry *entry, 1210 void *data); 1211 extern errcode_t ext2fs_ext_attr_hash_entry2(ext2_filsys fs, 1212 struct ext2_ext_attr_entry *entry, 1213 void *data, __u32 *hash); 1214 extern errcode_t ext2fs_read_ext_attr(ext2_filsys fs, blk_t block, void *buf); 1215 extern errcode_t ext2fs_read_ext_attr2(ext2_filsys fs, blk64_t block, 1216 void *buf); 1217 extern errcode_t ext2fs_read_ext_attr3(ext2_filsys fs, blk64_t block, 1218 void *buf, ext2_ino_t inum); 1219 extern errcode_t ext2fs_write_ext_attr(ext2_filsys fs, blk_t block, 1220 void *buf); 1221 extern errcode_t ext2fs_write_ext_attr2(ext2_filsys fs, blk64_t block, 1222 void *buf); 1223 extern errcode_t ext2fs_write_ext_attr3(ext2_filsys fs, blk64_t block, 1224 void *buf, ext2_ino_t inum); 1225 extern errcode_t ext2fs_adjust_ea_refcount(ext2_filsys fs, blk_t blk, 1226 char *block_buf, 1227 int adjust, __u32 *newcount); 1228 extern errcode_t ext2fs_adjust_ea_refcount2(ext2_filsys fs, blk64_t blk, 1229 char *block_buf, 1230 int adjust, __u32 *newcount); 1231 extern errcode_t ext2fs_adjust_ea_refcount3(ext2_filsys fs, blk64_t blk, 1232 char *block_buf, 1233 int adjust, __u32 *newcount, 1234 ext2_ino_t inum); 1235 errcode_t ext2fs_xattrs_write(struct ext2_xattr_handle *handle); 1236 errcode_t ext2fs_xattrs_read(struct ext2_xattr_handle *handle); 1237 errcode_t ext2fs_xattrs_iterate(struct ext2_xattr_handle *h, 1238 int (*func)(char *name, char *value, 1239 size_t value_len, void *data), 1240 void *data); 1241 errcode_t ext2fs_xattr_get(struct ext2_xattr_handle *h, const char *key, 1242 void **value, size_t *value_len); 1243 errcode_t ext2fs_xattr_set(struct ext2_xattr_handle *handle, 1244 const char *key, 1245 const void *value, 1246 size_t value_len); 1247 errcode_t ext2fs_xattr_remove(struct ext2_xattr_handle *handle, 1248 const char *key); 1249 errcode_t ext2fs_xattrs_open(ext2_filsys fs, ext2_ino_t ino, 1250 struct ext2_xattr_handle **handle); 1251 errcode_t ext2fs_xattrs_close(struct ext2_xattr_handle **handle); 1252 errcode_t ext2fs_free_ext_attr(ext2_filsys fs, ext2_ino_t ino, 1253 struct ext2_inode_large *inode); 1254 errcode_t ext2fs_xattrs_count(struct ext2_xattr_handle *handle, size_t *count); 1255 errcode_t ext2fs_xattr_inode_max_size(ext2_filsys fs, ext2_ino_t ino, 1256 size_t *size); 1257 #define XATTR_HANDLE_FLAG_RAW 0x0001 1258 errcode_t ext2fs_xattrs_flags(struct ext2_xattr_handle *handle, 1259 unsigned int *new_flags, unsigned int *old_flags); 1260 extern void ext2fs_ext_attr_block_rehash(struct ext2_ext_attr_header *header, 1261 struct ext2_ext_attr_entry *end); 1262 extern __u32 ext2fs_get_ea_inode_hash(struct ext2_inode *inode); 1263 extern void ext2fs_set_ea_inode_hash(struct ext2_inode *inode, __u32 hash); 1264 extern __u64 ext2fs_get_ea_inode_ref(struct ext2_inode *inode); 1265 extern void ext2fs_set_ea_inode_ref(struct ext2_inode *inode, __u64 ref_count); 1266 1267 /* extent.c */ 1268 extern errcode_t ext2fs_extent_header_verify(void *ptr, int size); 1269 extern errcode_t ext2fs_extent_open(ext2_filsys fs, ext2_ino_t ino, 1270 ext2_extent_handle_t *handle); 1271 extern errcode_t ext2fs_extent_open2(ext2_filsys fs, ext2_ino_t ino, 1272 struct ext2_inode *inode, 1273 ext2_extent_handle_t *ret_handle); 1274 extern void ext2fs_extent_free(ext2_extent_handle_t handle); 1275 extern errcode_t ext2fs_extent_get(ext2_extent_handle_t handle, 1276 int flags, struct ext2fs_extent *extent); 1277 extern errcode_t ext2fs_extent_node_split(ext2_extent_handle_t handle); 1278 extern errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle, int flags, 1279 struct ext2fs_extent *extent); 1280 extern errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags, 1281 struct ext2fs_extent *extent); 1282 extern errcode_t ext2fs_extent_set_bmap(ext2_extent_handle_t handle, 1283 blk64_t logical, blk64_t physical, 1284 int flags); 1285 extern errcode_t ext2fs_extent_delete(ext2_extent_handle_t handle, int flags); 1286 extern errcode_t ext2fs_extent_get_info(ext2_extent_handle_t handle, 1287 struct ext2_extent_info *info); 1288 extern errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle, 1289 blk64_t blk); 1290 extern errcode_t ext2fs_extent_goto2(ext2_extent_handle_t handle, 1291 int leaf_level, blk64_t blk); 1292 extern errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle); 1293 size_t ext2fs_max_extent_depth(ext2_extent_handle_t handle); 1294 1295 /* fallocate.c */ 1296 #define EXT2_FALLOCATE_ZERO_BLOCKS (0x1) 1297 #define EXT2_FALLOCATE_FORCE_INIT (0x2) 1298 #define EXT2_FALLOCATE_FORCE_UNINIT (0x4) 1299 #define EXT2_FALLOCATE_INIT_BEYOND_EOF (0x8) 1300 #define EXT2_FALLOCATE_ALL_FLAGS (0xF) 1301 errcode_t ext2fs_fallocate(ext2_filsys fs, int flags, ext2_ino_t ino, 1302 struct ext2_inode *inode, blk64_t goal, 1303 blk64_t start, blk64_t len); 1304 1305 /* fileio.c */ 1306 extern errcode_t ext2fs_file_open2(ext2_filsys fs, ext2_ino_t ino, 1307 struct ext2_inode *inode, 1308 int flags, ext2_file_t *ret); 1309 extern errcode_t ext2fs_file_open(ext2_filsys fs, ext2_ino_t ino, 1310 int flags, ext2_file_t *ret); 1311 extern ext2_filsys ext2fs_file_get_fs(ext2_file_t file); 1312 struct ext2_inode *ext2fs_file_get_inode(ext2_file_t file); 1313 extern ext2_ino_t ext2fs_file_get_inode_num(ext2_file_t file); 1314 extern errcode_t ext2fs_file_close(ext2_file_t file); 1315 extern errcode_t ext2fs_file_flush(ext2_file_t file); 1316 extern errcode_t ext2fs_file_read(ext2_file_t file, void *buf, 1317 unsigned int wanted, unsigned int *got); 1318 extern errcode_t ext2fs_file_write(ext2_file_t file, const void *buf, 1319 unsigned int nbytes, unsigned int *written); 1320 extern errcode_t ext2fs_file_llseek(ext2_file_t file, __u64 offset, 1321 int whence, __u64 *ret_pos); 1322 extern errcode_t ext2fs_file_lseek(ext2_file_t file, ext2_off_t offset, 1323 int whence, ext2_off_t *ret_pos); 1324 errcode_t ext2fs_file_get_lsize(ext2_file_t file, __u64 *ret_size); 1325 extern ext2_off_t ext2fs_file_get_size(ext2_file_t file); 1326 extern errcode_t ext2fs_file_set_size(ext2_file_t file, ext2_off_t size); 1327 extern errcode_t ext2fs_file_set_size2(ext2_file_t file, ext2_off64_t size); 1328 1329 /* finddev.c */ 1330 extern char *ext2fs_find_block_device(dev_t device); 1331 1332 /* flushb.c */ 1333 extern errcode_t ext2fs_sync_device(int fd, int flushb); 1334 1335 /* freefs.c */ 1336 extern void ext2fs_free(ext2_filsys fs); 1337 extern void ext2fs_free_dblist(ext2_dblist dblist); 1338 extern void ext2fs_badblocks_list_free(ext2_badblocks_list bb); 1339 extern void ext2fs_u32_list_free(ext2_u32_list bb); 1340 1341 /* gen_bitmap.c */ 1342 extern void ext2fs_free_generic_bitmap(ext2fs_inode_bitmap bitmap); 1343 extern errcode_t ext2fs_make_generic_bitmap(errcode_t magic, ext2_filsys fs, 1344 __u32 start, __u32 end, 1345 __u32 real_end, 1346 const char *descr, char *init_map, 1347 ext2fs_generic_bitmap *ret); 1348 extern errcode_t ext2fs_allocate_generic_bitmap(__u32 start, 1349 __u32 end, 1350 __u32 real_end, 1351 const char *descr, 1352 ext2fs_generic_bitmap *ret); 1353 extern errcode_t ext2fs_copy_generic_bitmap(ext2fs_generic_bitmap src, 1354 ext2fs_generic_bitmap *dest); 1355 extern void ext2fs_clear_generic_bitmap(ext2fs_generic_bitmap bitmap); 1356 extern errcode_t ext2fs_fudge_generic_bitmap_end(ext2fs_inode_bitmap bitmap, 1357 errcode_t magic, 1358 errcode_t neq, 1359 ext2_ino_t end, 1360 ext2_ino_t *oend); 1361 extern void ext2fs_set_generic_bitmap_padding(ext2fs_generic_bitmap map); 1362 extern errcode_t ext2fs_resize_generic_bitmap(errcode_t magic, 1363 __u32 new_end, 1364 __u32 new_real_end, 1365 ext2fs_generic_bitmap bmap); 1366 extern errcode_t ext2fs_compare_generic_bitmap(errcode_t magic, errcode_t neq, 1367 ext2fs_generic_bitmap bm1, 1368 ext2fs_generic_bitmap bm2); 1369 extern errcode_t ext2fs_get_generic_bitmap_range(ext2fs_generic_bitmap bmap, 1370 errcode_t magic, 1371 __u32 start, __u32 num, 1372 void *out); 1373 extern errcode_t ext2fs_set_generic_bitmap_range(ext2fs_generic_bitmap bmap, 1374 errcode_t magic, 1375 __u32 start, __u32 num, 1376 void *in); 1377 extern errcode_t ext2fs_find_first_zero_generic_bitmap(ext2fs_generic_bitmap bitmap, 1378 __u32 start, __u32 end, 1379 __u32 *out); 1380 extern errcode_t ext2fs_find_first_set_generic_bitmap(ext2fs_generic_bitmap bitmap, 1381 __u32 start, __u32 end, 1382 __u32 *out); 1383 1384 /* gen_bitmap64.c */ 1385 void ext2fs_free_generic_bmap(ext2fs_generic_bitmap bmap); 1386 errcode_t ext2fs_alloc_generic_bmap(ext2_filsys fs, errcode_t magic, 1387 int type, __u64 start, __u64 end, 1388 __u64 real_end, 1389 const char *descr, 1390 ext2fs_generic_bitmap *ret); 1391 errcode_t ext2fs_copy_generic_bmap(ext2fs_generic_bitmap src, 1392 ext2fs_generic_bitmap *dest); 1393 void ext2fs_clear_generic_bmap(ext2fs_generic_bitmap bitmap); 1394 errcode_t ext2fs_fudge_generic_bmap_end(ext2fs_generic_bitmap bitmap, 1395 errcode_t neq, 1396 __u64 end, __u64 *oend); 1397 void ext2fs_set_generic_bmap_padding(ext2fs_generic_bitmap bmap); 1398 errcode_t ext2fs_resize_generic_bmap(ext2fs_generic_bitmap bmap, 1399 __u64 new_end, 1400 __u64 new_real_end); 1401 errcode_t ext2fs_compare_generic_bmap(errcode_t neq, 1402 ext2fs_generic_bitmap bm1, 1403 ext2fs_generic_bitmap bm2); 1404 errcode_t ext2fs_get_generic_bmap_range(ext2fs_generic_bitmap bmap, 1405 __u64 start, unsigned int num, 1406 void *out); 1407 errcode_t ext2fs_set_generic_bmap_range(ext2fs_generic_bitmap bmap, 1408 __u64 start, unsigned int num, 1409 void *in); 1410 errcode_t ext2fs_convert_subcluster_bitmap(ext2_filsys fs, 1411 ext2fs_block_bitmap *bitmap); 1412 1413 /* get_num_dirs.c */ 1414 extern errcode_t ext2fs_get_num_dirs(ext2_filsys fs, ext2_ino_t *ret_num_dirs); 1415 1416 /* getsize.c */ 1417 extern errcode_t ext2fs_get_device_size(const char *file, int blocksize, 1418 blk_t *retblocks); 1419 extern errcode_t ext2fs_get_device_size2(const char *file, int blocksize, 1420 blk64_t *retblocks); 1421 1422 /* getsectsize.c */ 1423 extern int ext2fs_get_dio_alignment(int fd); 1424 errcode_t ext2fs_get_device_sectsize(const char *file, int *sectsize); 1425 errcode_t ext2fs_get_device_phys_sectsize(const char *file, int *sectsize); 1426 1427 /* i_block.c */ 1428 errcode_t ext2fs_iblk_add_blocks(ext2_filsys fs, struct ext2_inode *inode, 1429 blk64_t num_blocks); 1430 errcode_t ext2fs_iblk_sub_blocks(ext2_filsys fs, struct ext2_inode *inode, 1431 blk64_t num_blocks); 1432 errcode_t ext2fs_iblk_set(ext2_filsys fs, struct ext2_inode *inode, blk64_t b); 1433 1434 /* imager.c */ 1435 extern errcode_t ext2fs_image_inode_write(ext2_filsys fs, int fd, int flags); 1436 extern errcode_t ext2fs_image_inode_read(ext2_filsys fs, int fd, int flags); 1437 extern errcode_t ext2fs_image_super_write(ext2_filsys fs, int fd, int flags); 1438 extern errcode_t ext2fs_image_super_read(ext2_filsys fs, int fd, int flags); 1439 extern errcode_t ext2fs_image_bitmap_write(ext2_filsys fs, int fd, int flags); 1440 extern errcode_t ext2fs_image_bitmap_read(ext2_filsys fs, int fd, int flags); 1441 1442 /* ind_block.c */ 1443 errcode_t ext2fs_read_ind_block(ext2_filsys fs, blk_t blk, void *buf); 1444 errcode_t ext2fs_write_ind_block(ext2_filsys fs, blk_t blk, void *buf); 1445 1446 /* initialize.c */ 1447 extern errcode_t ext2fs_initialize(const char *name, int flags, 1448 struct ext2_super_block *param, 1449 io_manager manager, ext2_filsys *ret_fs); 1450 1451 /* icount.c */ 1452 extern void ext2fs_free_icount(ext2_icount_t icount); 1453 extern errcode_t ext2fs_create_icount_tdb(ext2_filsys fs, char *tdb_dir, 1454 int flags, ext2_icount_t *ret); 1455 extern errcode_t ext2fs_create_icount2(ext2_filsys fs, int flags, 1456 unsigned int size, 1457 ext2_icount_t hint, ext2_icount_t *ret); 1458 extern errcode_t ext2fs_create_icount(ext2_filsys fs, int flags, 1459 unsigned int size, 1460 ext2_icount_t *ret); 1461 extern errcode_t ext2fs_icount_fetch(ext2_icount_t icount, ext2_ino_t ino, 1462 __u16 *ret); 1463 extern errcode_t ext2fs_icount_increment(ext2_icount_t icount, ext2_ino_t ino, 1464 __u16 *ret); 1465 extern errcode_t ext2fs_icount_decrement(ext2_icount_t icount, ext2_ino_t ino, 1466 __u16 *ret); 1467 extern errcode_t ext2fs_icount_store(ext2_icount_t icount, ext2_ino_t ino, 1468 __u16 count); 1469 extern ext2_ino_t ext2fs_get_icount_size(ext2_icount_t icount); 1470 errcode_t ext2fs_icount_validate(ext2_icount_t icount, FILE *); 1471 1472 /* inline.c */ 1473 1474 extern errcode_t ext2fs_get_memalign(unsigned long size, 1475 unsigned long align, void *ptr); 1476 1477 /* inline_data.c */ 1478 extern errcode_t ext2fs_inline_data_init(ext2_filsys fs, ext2_ino_t ino); 1479 extern errcode_t ext2fs_inline_data_size(ext2_filsys fs, ext2_ino_t ino, 1480 size_t *size); 1481 extern errcode_t ext2fs_inline_data_get(ext2_filsys fs, ext2_ino_t ino, 1482 struct ext2_inode *inode, 1483 void *buf, size_t *size); 1484 extern errcode_t ext2fs_inline_data_set(ext2_filsys fs, ext2_ino_t ino, 1485 struct ext2_inode *inode, 1486 void *buf, size_t size); 1487 1488 /* inode.c */ 1489 extern errcode_t ext2fs_create_inode_cache(ext2_filsys fs, 1490 unsigned int cache_size); 1491 extern void ext2fs_free_inode_cache(struct ext2_inode_cache *icache); 1492 extern errcode_t ext2fs_flush_icache(ext2_filsys fs); 1493 extern errcode_t ext2fs_get_next_inode_full(ext2_inode_scan scan, 1494 ext2_ino_t *ino, 1495 struct ext2_inode *inode, 1496 int bufsize); 1497 #define EXT2_INODE_SCAN_DEFAULT_BUFFER_BLOCKS 8 1498 extern errcode_t ext2fs_open_inode_scan(ext2_filsys fs, int buffer_blocks, 1499 ext2_inode_scan *ret_scan); 1500 extern void ext2fs_close_inode_scan(ext2_inode_scan scan); 1501 extern errcode_t ext2fs_get_next_inode(ext2_inode_scan scan, ext2_ino_t *ino, 1502 struct ext2_inode *inode); 1503 extern errcode_t ext2fs_inode_scan_goto_blockgroup(ext2_inode_scan scan, 1504 int group); 1505 extern void ext2fs_set_inode_callback 1506 (ext2_inode_scan scan, 1507 errcode_t (*done_group)(ext2_filsys fs, 1508 ext2_inode_scan scan, 1509 dgrp_t group, 1510 void * priv_data), 1511 void *done_group_data); 1512 extern int ext2fs_inode_scan_flags(ext2_inode_scan scan, int set_flags, 1513 int clear_flags); 1514 extern errcode_t ext2fs_read_inode_full(ext2_filsys fs, ext2_ino_t ino, 1515 struct ext2_inode * inode, 1516 int bufsize); 1517 extern errcode_t ext2fs_read_inode (ext2_filsys fs, ext2_ino_t ino, 1518 struct ext2_inode * inode); 1519 extern errcode_t ext2fs_write_inode_full(ext2_filsys fs, ext2_ino_t ino, 1520 struct ext2_inode * inode, 1521 int bufsize); 1522 extern errcode_t ext2fs_write_inode(ext2_filsys fs, ext2_ino_t ino, 1523 struct ext2_inode * inode); 1524 extern errcode_t ext2fs_write_new_inode(ext2_filsys fs, ext2_ino_t ino, 1525 struct ext2_inode * inode); 1526 extern errcode_t ext2fs_get_blocks(ext2_filsys fs, ext2_ino_t ino, blk_t *blocks); 1527 extern errcode_t ext2fs_check_directory(ext2_filsys fs, ext2_ino_t ino); 1528 1529 /* inode_io.c */ 1530 extern io_manager inode_io_manager; 1531 extern errcode_t ext2fs_inode_io_intern(ext2_filsys fs, ext2_ino_t ino, 1532 char **name); 1533 extern errcode_t ext2fs_inode_io_intern2(ext2_filsys fs, ext2_ino_t ino, 1534 struct ext2_inode *inode, 1535 char **name); 1536 1537 /* ismounted.c */ 1538 extern errcode_t ext2fs_check_if_mounted(const char *file, int *mount_flags); 1539 extern errcode_t ext2fs_check_mount_point(const char *device, int *mount_flags, 1540 char *mtpt, int mtlen); 1541 1542 /* punch.c */ 1543 /* 1544 * NOTE: This function removes from an inode the blocks "start", "end", and 1545 * every block in between. 1546 */ 1547 extern errcode_t ext2fs_punch(ext2_filsys fs, ext2_ino_t ino, 1548 struct ext2_inode *inode, 1549 char *block_buf, blk64_t start, 1550 blk64_t end); 1551 1552 /* namei.c */ 1553 extern errcode_t ext2fs_lookup(ext2_filsys fs, ext2_ino_t dir, const char *name, 1554 int namelen, char *buf, ext2_ino_t *inode); 1555 extern errcode_t ext2fs_namei(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 1556 const char *name, ext2_ino_t *inode); 1557 errcode_t ext2fs_namei_follow(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 1558 const char *name, ext2_ino_t *inode); 1559 extern errcode_t ext2fs_follow_link(ext2_filsys fs, ext2_ino_t root, ext2_ino_t cwd, 1560 ext2_ino_t inode, ext2_ino_t *res_inode); 1561 1562 /* native.c */ 1563 int ext2fs_native_flag(void); 1564 1565 /* newdir.c */ 1566 extern errcode_t ext2fs_new_dir_block(ext2_filsys fs, ext2_ino_t dir_ino, 1567 ext2_ino_t parent_ino, char **block); 1568 extern errcode_t ext2fs_new_dir_inline_data(ext2_filsys fs, ext2_ino_t dir_ino, 1569 ext2_ino_t parent_ino, __u32 *iblock); 1570 1571 /* mkdir.c */ 1572 extern errcode_t ext2fs_mkdir(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t inum, 1573 const char *name); 1574 1575 /* mkjournal.c */ 1576 extern errcode_t ext2fs_zero_blocks(ext2_filsys fs, blk_t blk, int num, 1577 blk_t *ret_blk, int *ret_count); 1578 extern errcode_t ext2fs_zero_blocks2(ext2_filsys fs, blk64_t blk, int num, 1579 blk64_t *ret_blk, int *ret_count); 1580 extern errcode_t ext2fs_create_journal_superblock(ext2_filsys fs, 1581 __u32 num_blocks, int flags, 1582 char **ret_jsb); 1583 extern errcode_t ext2fs_add_journal_device(ext2_filsys fs, 1584 ext2_filsys journal_dev); 1585 extern errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t num_blocks, 1586 int flags); 1587 extern errcode_t ext2fs_add_journal_inode2(ext2_filsys fs, blk_t num_blocks, 1588 blk64_t goal, int flags); 1589 extern int ext2fs_default_journal_size(__u64 num_blocks); 1590 extern int ext2fs_journal_sb_start(int blocksize); 1591 1592 /* openfs.c */ 1593 extern errcode_t ext2fs_open(const char *name, int flags, int superblock, 1594 unsigned int block_size, io_manager manager, 1595 ext2_filsys *ret_fs); 1596 extern errcode_t ext2fs_open2(const char *name, const char *io_options, 1597 int flags, int superblock, 1598 unsigned int block_size, io_manager manager, 1599 ext2_filsys *ret_fs); 1600 /* 1601 * The dgrp_t argument to these two functions is not actually a group number 1602 * but a block number offset within a group table! Convert with the formula 1603 * (group_number / groups_per_block). 1604 */ 1605 extern blk64_t ext2fs_descriptor_block_loc2(ext2_filsys fs, 1606 blk64_t group_block, dgrp_t i); 1607 extern blk_t ext2fs_descriptor_block_loc(ext2_filsys fs, blk_t group_block, 1608 dgrp_t i); 1609 errcode_t ext2fs_get_data_io(ext2_filsys fs, io_channel *old_io); 1610 errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io); 1611 errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io); 1612 1613 /* get_pathname.c */ 1614 extern errcode_t ext2fs_get_pathname(ext2_filsys fs, ext2_ino_t dir, ext2_ino_t ino, 1615 char **name); 1616 1617 /* link.c */ 1618 errcode_t ext2fs_link(ext2_filsys fs, ext2_ino_t dir, const char *name, 1619 ext2_ino_t ino, int flags); 1620 errcode_t ext2fs_unlink(ext2_filsys fs, ext2_ino_t dir, const char *name, 1621 ext2_ino_t ino, int flags); 1622 1623 /* symlink.c */ 1624 errcode_t ext2fs_symlink(ext2_filsys fs, ext2_ino_t parent, ext2_ino_t ino, 1625 const char *name, const char *target); 1626 int ext2fs_is_fast_symlink(struct ext2_inode *inode); 1627 1628 /* mmp.c */ 1629 errcode_t ext2fs_mmp_read(ext2_filsys fs, blk64_t mmp_blk, void *buf); 1630 errcode_t ext2fs_mmp_write(ext2_filsys fs, blk64_t mmp_blk, void *buf); 1631 errcode_t ext2fs_mmp_clear(ext2_filsys fs); 1632 errcode_t ext2fs_mmp_init(ext2_filsys fs); 1633 errcode_t ext2fs_mmp_start(ext2_filsys fs); 1634 errcode_t ext2fs_mmp_update(ext2_filsys fs); 1635 errcode_t ext2fs_mmp_update2(ext2_filsys fs, int immediately); 1636 errcode_t ext2fs_mmp_stop(ext2_filsys fs); 1637 unsigned ext2fs_mmp_new_seq(void); 1638 1639 /* read_bb.c */ 1640 extern errcode_t ext2fs_read_bb_inode(ext2_filsys fs, 1641 ext2_badblocks_list *bb_list); 1642 1643 /* read_bb_file.c */ 1644 extern errcode_t ext2fs_read_bb_FILE2(ext2_filsys fs, FILE *f, 1645 ext2_badblocks_list *bb_list, 1646 void *priv_data, 1647 void (*invalid)(ext2_filsys fs, 1648 blk_t blk, 1649 char *badstr, 1650 void *priv_data)); 1651 extern errcode_t ext2fs_read_bb_FILE(ext2_filsys fs, FILE *f, 1652 ext2_badblocks_list *bb_list, 1653 void (*invalid)(ext2_filsys fs, 1654 blk_t blk)); 1655 1656 /* res_gdt.c */ 1657 extern errcode_t ext2fs_create_resize_inode(ext2_filsys fs); 1658 1659 /*sha256.c */ 1660 #define EXT2FS_SHA256_LENGTH 32 1661 #if 0 1662 extern void ext2fs_sha256(const unsigned char *in, unsigned long in_size, 1663 unsigned char out[EXT2FS_SHA256_LENGTH]); 1664 #endif 1665 1666 /* sha512.c */ 1667 #define EXT2FS_SHA512_LENGTH 64 1668 extern void ext2fs_sha512(const unsigned char *in, unsigned long in_size, 1669 unsigned char out[EXT2FS_SHA512_LENGTH]); 1670 1671 /* swapfs.c */ 1672 extern errcode_t ext2fs_dirent_swab_in2(ext2_filsys fs, char *buf, size_t size, 1673 int flags); 1674 extern errcode_t ext2fs_dirent_swab_in(ext2_filsys fs, char *buf, int flags); 1675 extern errcode_t ext2fs_dirent_swab_out2(ext2_filsys fs, char *buf, size_t size, 1676 int flags); 1677 extern errcode_t ext2fs_dirent_swab_out(ext2_filsys fs, char *buf, int flags); 1678 extern void ext2fs_swap_ext_attr(char *to, char *from, int bufsize, 1679 int has_header); 1680 extern void ext2fs_swap_ext_attr_header(struct ext2_ext_attr_header *to_header, 1681 struct ext2_ext_attr_header *from_hdr); 1682 extern void ext2fs_swap_ext_attr_entry(struct ext2_ext_attr_entry *to_entry, 1683 struct ext2_ext_attr_entry *from_entry); 1684 extern void ext2fs_swap_super(struct ext2_super_block * super); 1685 extern void ext2fs_swap_group_desc(struct ext2_group_desc *gdp); 1686 extern void ext2fs_swap_group_desc2(ext2_filsys, struct ext2_group_desc *gdp); 1687 extern void ext2fs_swap_inode_full(ext2_filsys fs, struct ext2_inode_large *t, 1688 struct ext2_inode_large *f, int hostorder, 1689 int bufsize); 1690 extern void ext2fs_swap_inode(ext2_filsys fs,struct ext2_inode *t, 1691 struct ext2_inode *f, int hostorder); 1692 extern void ext2fs_swap_mmp(struct mmp_struct *mmp); 1693 1694 /* unix_io.c */ 1695 extern int ext2fs_open_file(const char *pathname, int flags, mode_t mode); 1696 extern int ext2fs_stat(const char *path, ext2fs_struct_stat *buf); 1697 extern int ext2fs_fstat(int fd, ext2fs_struct_stat *buf); 1698 1699 /* valid_blk.c */ 1700 extern int ext2fs_inode_has_valid_blocks(struct ext2_inode *inode); 1701 extern int ext2fs_inode_has_valid_blocks2(ext2_filsys fs, 1702 struct ext2_inode *inode); 1703 1704 /* version.c */ 1705 extern int ext2fs_parse_version_string(const char *ver_string); 1706 extern int ext2fs_get_library_version(const char **ver_string, 1707 const char **date_string); 1708 1709 /* write_bb_file.c */ 1710 extern errcode_t ext2fs_write_bb_FILE(ext2_badblocks_list bb_list, 1711 unsigned int flags, 1712 FILE *f); 1713 1714 1715 /* inline functions */ 1716 #ifdef NO_INLINE_FUNCS 1717 extern errcode_t ext2fs_get_mem(unsigned long size, void *ptr); 1718 extern errcode_t ext2fs_get_memzero(unsigned long size, void *ptr); 1719 extern errcode_t ext2fs_get_array(unsigned long count, 1720 unsigned long size, void *ptr); 1721 extern errcode_t ext2fs_get_arrayzero(unsigned long count, 1722 unsigned long size, void *ptr); 1723 extern errcode_t ext2fs_free_mem(void *ptr); 1724 extern errcode_t ext2fs_resize_mem(unsigned long old_size, 1725 unsigned long size, void *ptr); 1726 extern void ext2fs_mark_super_dirty(ext2_filsys fs); 1727 extern void ext2fs_mark_changed(ext2_filsys fs); 1728 extern int ext2fs_test_changed(ext2_filsys fs); 1729 extern void ext2fs_mark_valid(ext2_filsys fs); 1730 extern void ext2fs_unmark_valid(ext2_filsys fs); 1731 extern int ext2fs_test_valid(ext2_filsys fs); 1732 extern void ext2fs_mark_ib_dirty(ext2_filsys fs); 1733 extern void ext2fs_mark_bb_dirty(ext2_filsys fs); 1734 extern int ext2fs_test_ib_dirty(ext2_filsys fs); 1735 extern int ext2fs_test_bb_dirty(ext2_filsys fs); 1736 extern dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk); 1737 extern dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino); 1738 extern blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group); 1739 extern blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group); 1740 extern blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 1741 struct ext2_inode *inode); 1742 extern int ext2fs_htree_intnode_maxrecs(ext2_filsys fs, int blocks); 1743 extern unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b); 1744 extern __u64 ext2fs_div64_ceil(__u64 a, __u64 b); 1745 extern int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry); 1746 extern void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len); 1747 extern int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry); 1748 extern void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type); 1749 extern struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode); 1750 extern const struct ext2_inode *ext2fs_const_inode(const struct ext2_inode_large * large_inode); 1751 1752 #endif 1753 1754 /* 1755 * The actual inlined functions definitions themselves... 1756 * 1757 * If NO_INLINE_FUNCS is defined, then we won't try to do inline 1758 * functions at all! 1759 */ 1760 #if (defined(INCLUDE_INLINE_FUNCS) || !defined(NO_INLINE_FUNCS)) 1761 #ifdef INCLUDE_INLINE_FUNCS 1762 #define _INLINE_ extern 1763 #else 1764 #if (__STDC_VERSION__ >= 199901L) 1765 #define _INLINE_ inline 1766 #else 1767 #ifdef __GNUC__ 1768 #define _INLINE_ extern __inline__ 1769 #else /* For Watcom C */ 1770 #define _INLINE_ extern inline 1771 #endif /* __GNUC__ */ 1772 #endif /* __STDC_VERSION__ >= 199901L */ 1773 #endif 1774 1775 #ifndef EXT2_CUSTOM_MEMORY_ROUTINES 1776 #include <string.h> 1777 /* 1778 * Allocate memory. The 'ptr' arg must point to a pointer. 1779 */ 1780 _INLINE_ errcode_t ext2fs_get_mem(unsigned long size, void *ptr) 1781 { 1782 void *pp; 1783 1784 pp = malloc(size); 1785 if (!pp) 1786 return EXT2_ET_NO_MEMORY; 1787 memcpy(ptr, &pp, sizeof (pp)); 1788 return 0; 1789 } 1790 1791 _INLINE_ errcode_t ext2fs_get_memzero(unsigned long size, void *ptr) 1792 { 1793 void *pp; 1794 1795 pp = malloc(size); 1796 if (!pp) 1797 return EXT2_ET_NO_MEMORY; 1798 memset(pp, 0, size); 1799 memcpy(ptr, &pp, sizeof(pp)); 1800 return 0; 1801 } 1802 1803 _INLINE_ errcode_t ext2fs_get_array(unsigned long count, unsigned long size, void *ptr) 1804 { 1805 if (count && (~0UL)/count < size) 1806 return EXT2_ET_NO_MEMORY; 1807 return ext2fs_get_mem(count*size, ptr); 1808 } 1809 1810 _INLINE_ errcode_t ext2fs_get_arrayzero(unsigned long count, 1811 unsigned long size, void *ptr) 1812 { 1813 void *pp; 1814 1815 if (count && (~0UL)/count < size) 1816 return EXT2_ET_NO_MEMORY; 1817 pp = calloc(count, size); 1818 if (!pp) 1819 return EXT2_ET_NO_MEMORY; 1820 memcpy(ptr, &pp, sizeof(pp)); 1821 return 0; 1822 } 1823 1824 /* 1825 * Free memory. The 'ptr' arg must point to a pointer. 1826 */ 1827 _INLINE_ errcode_t ext2fs_free_mem(void *ptr) 1828 { 1829 void *p; 1830 1831 memcpy(&p, ptr, sizeof(p)); 1832 free(p); 1833 p = 0; 1834 memcpy(ptr, &p, sizeof(p)); 1835 return 0; 1836 } 1837 1838 /* 1839 * Resize memory. The 'ptr' arg must point to a pointer. 1840 */ 1841 _INLINE_ errcode_t ext2fs_resize_mem(unsigned long EXT2FS_ATTR((unused)) old_size, 1842 unsigned long size, void *ptr) 1843 { 1844 void *p; 1845 1846 /* Use "memcpy" for pointer assignments here to avoid problems 1847 * with C99 strict type aliasing rules. */ 1848 memcpy(&p, ptr, sizeof(p)); 1849 p = realloc(p, size); 1850 if (!p) 1851 return EXT2_ET_NO_MEMORY; 1852 memcpy(ptr, &p, sizeof(p)); 1853 return 0; 1854 } 1855 #endif /* Custom memory routines */ 1856 1857 /* 1858 * Mark a filesystem superblock as dirty 1859 */ 1860 _INLINE_ void ext2fs_mark_super_dirty(ext2_filsys fs) 1861 { 1862 fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_CHANGED; 1863 } 1864 1865 /* 1866 * Mark a filesystem as changed 1867 */ 1868 _INLINE_ void ext2fs_mark_changed(ext2_filsys fs) 1869 { 1870 fs->flags |= EXT2_FLAG_CHANGED; 1871 } 1872 1873 /* 1874 * Check to see if a filesystem has changed 1875 */ 1876 _INLINE_ int ext2fs_test_changed(ext2_filsys fs) 1877 { 1878 return (fs->flags & EXT2_FLAG_CHANGED); 1879 } 1880 1881 /* 1882 * Mark a filesystem as valid 1883 */ 1884 _INLINE_ void ext2fs_mark_valid(ext2_filsys fs) 1885 { 1886 fs->flags |= EXT2_FLAG_VALID; 1887 } 1888 1889 /* 1890 * Mark a filesystem as NOT valid 1891 */ 1892 _INLINE_ void ext2fs_unmark_valid(ext2_filsys fs) 1893 { 1894 fs->flags &= ~EXT2_FLAG_VALID; 1895 } 1896 1897 /* 1898 * Check to see if a filesystem is valid 1899 */ 1900 _INLINE_ int ext2fs_test_valid(ext2_filsys fs) 1901 { 1902 return (fs->flags & EXT2_FLAG_VALID); 1903 } 1904 1905 /* 1906 * Mark the inode bitmap as dirty 1907 */ 1908 _INLINE_ void ext2fs_mark_ib_dirty(ext2_filsys fs) 1909 { 1910 fs->flags |= EXT2_FLAG_IB_DIRTY | EXT2_FLAG_CHANGED; 1911 } 1912 1913 /* 1914 * Mark the block bitmap as dirty 1915 */ 1916 _INLINE_ void ext2fs_mark_bb_dirty(ext2_filsys fs) 1917 { 1918 fs->flags |= EXT2_FLAG_BB_DIRTY | EXT2_FLAG_CHANGED; 1919 } 1920 1921 /* 1922 * Check to see if a filesystem's inode bitmap is dirty 1923 */ 1924 _INLINE_ int ext2fs_test_ib_dirty(ext2_filsys fs) 1925 { 1926 return (fs->flags & EXT2_FLAG_IB_DIRTY); 1927 } 1928 1929 /* 1930 * Check to see if a filesystem's block bitmap is dirty 1931 */ 1932 _INLINE_ int ext2fs_test_bb_dirty(ext2_filsys fs) 1933 { 1934 return (fs->flags & EXT2_FLAG_BB_DIRTY); 1935 } 1936 1937 /* 1938 * Return the group # of a block 1939 */ 1940 _INLINE_ dgrp_t ext2fs_group_of_blk(ext2_filsys fs, blk_t blk) 1941 { 1942 return ext2fs_group_of_blk2(fs, blk); 1943 } 1944 /* 1945 * Return the group # of an inode number 1946 */ 1947 _INLINE_ dgrp_t ext2fs_group_of_ino(ext2_filsys fs, ext2_ino_t ino) 1948 { 1949 return (ino - 1) / fs->super->s_inodes_per_group; 1950 } 1951 1952 /* 1953 * Return the first block (inclusive) in a group 1954 */ 1955 _INLINE_ blk_t ext2fs_group_first_block(ext2_filsys fs, dgrp_t group) 1956 { 1957 return (blk_t) ext2fs_group_first_block2(fs, group); 1958 } 1959 1960 /* 1961 * Return the last block (inclusive) in a group 1962 */ 1963 _INLINE_ blk_t ext2fs_group_last_block(ext2_filsys fs, dgrp_t group) 1964 { 1965 return (blk_t) ext2fs_group_last_block2(fs, group); 1966 } 1967 1968 _INLINE_ blk_t ext2fs_inode_data_blocks(ext2_filsys fs, 1969 struct ext2_inode *inode) 1970 { 1971 return (blk_t) ext2fs_inode_data_blocks2(fs, inode); 1972 } 1973 1974 _INLINE_ int ext2fs_htree_intnode_maxrecs(ext2_filsys fs, int blocks) 1975 { 1976 return blocks * ((fs->blocksize - 8) / sizeof(struct ext2_dx_entry)); 1977 } 1978 1979 /* 1980 * This is an efficient, overflow safe way of calculating ceil((1.0 * a) / b) 1981 */ 1982 _INLINE_ unsigned int ext2fs_div_ceil(unsigned int a, unsigned int b) 1983 { 1984 if (!a) 1985 return 0; 1986 return ((a - 1) / b) + 1; 1987 } 1988 1989 _INLINE_ __u64 ext2fs_div64_ceil(__u64 a, __u64 b) 1990 { 1991 if (!a) 1992 return 0; 1993 return ((a - 1) / b) + 1; 1994 } 1995 1996 _INLINE_ int ext2fs_dirent_name_len(const struct ext2_dir_entry *entry) 1997 { 1998 return entry->name_len & 0xff; 1999 } 2000 2001 _INLINE_ void ext2fs_dirent_set_name_len(struct ext2_dir_entry *entry, int len) 2002 { 2003 entry->name_len = (entry->name_len & 0xff00) | (len & 0xff); 2004 } 2005 2006 _INLINE_ int ext2fs_dirent_file_type(const struct ext2_dir_entry *entry) 2007 { 2008 return entry->name_len >> 8; 2009 } 2010 2011 _INLINE_ void ext2fs_dirent_set_file_type(struct ext2_dir_entry *entry, int type) 2012 { 2013 entry->name_len = (entry->name_len & 0xff) | (type << 8); 2014 } 2015 2016 _INLINE_ struct ext2_inode *ext2fs_inode(struct ext2_inode_large * large_inode) 2017 { 2018 /* It is always safe to convert large inode to a small inode */ 2019 return (struct ext2_inode *) large_inode; 2020 } 2021 2022 _INLINE_ const struct ext2_inode * 2023 ext2fs_const_inode(const struct ext2_inode_large * large_inode) 2024 { 2025 /* It is always safe to convert large inode to a small inode */ 2026 return (const struct ext2_inode *) large_inode; 2027 } 2028 2029 #undef _INLINE_ 2030 #endif 2031 2032 /* htree levels for ext4 */ 2033 #define EXT4_HTREE_LEVEL_COMPAT 2 2034 #define EXT4_HTREE_LEVEL 3 2035 2036 static inline unsigned int ext2_dir_htree_level(ext2_filsys fs) 2037 { 2038 if (ext2fs_has_feature_largedir(fs->super)) 2039 return EXT4_HTREE_LEVEL; 2040 2041 return EXT4_HTREE_LEVEL_COMPAT; 2042 } 2043 2044 #ifdef __cplusplus 2045 } 2046 #endif 2047 2048 #endif /* _EXT2FS_EXT2FS_H */