e2fsck/e2fsck.h

   1 /*
   2  * e2fsck.h
   3  *
   4  * Copyright (C) 1993, 1994 Theodore Ts'o.  This file may be
   5  * redistributed under the terms of the GNU Public License.
   6  *
   7  */
   8
   9 #ifndef _E2FSCK_H
  10 #define _E2FSCK_H
  11
  12 #include <stdio.h>
  13 #include <string.h>
  14 #ifdef HAVE_UNISTD_H
  15 #include <unistd.h>
  16 #endif
  17 #include <stdlib.h>
  18 #include <time.h>
  19 #ifdef HAVE_SYS_TYPES_H
  20 #include <sys/types.h>
  21 #endif
  22 #ifdef HAVE_SYS_TIME_H
  23 #include <sys/time.h>
  24 #endif
  25 #ifdef HAVE_SETJMP_H
  26 #include <setjmp.h>
  27 #endif
  28
  29 #if EXT2_FLAT_INCLUDES
  30 #include "ext2_fs.h"
  31 #include "ext2fs.h"
  32 #include "blkid.h"
  33 #else
  34 #include "ext2fs/ext2_fs.h"
  35 #include "ext2fs/ext2fs.h"
  36 #include "blkid/blkid.h"
  37 #endif
  38
  39 #include "support/profile.h"
  40 #include "support/prof_err.h"
  41
  42 #ifdef ENABLE_NLS
  43 #include <libintl.h>
  44 #include <locale.h>
  45 #define _(a) (gettext (a))
  46 #ifdef gettext_noop
  47 #define N_(a) gettext_noop (a)
  48 #else
  49 #define N_(a) (a)
  50 #endif
  51 #define P_(singular, plural, n) (ngettext (singular, plural, n))
  52 #ifndef NLS_CAT_NAME
  53 #define NLS_CAT_NAME "e2fsprogs"
  54 #endif
  55 #ifndef LOCALEDIR
  56 #define LOCALEDIR "/usr/share/locale"
  57 #endif
  58 #else
  59 #define _(a) (a)
  60 #define N_(a) a
  61 #define P_(singular, plural, n) ((n) == 1 ? (singular) : (plural))
  62 #endif
  63
  64 #ifdef __GNUC__
  65 #define E2FSCK_ATTR(x) __attribute__(x)
  66 #else
  67 #define E2FSCK_ATTR(x)
  68 #endif
  69
  70 #include "support/quotaio.h"
  71
  72 /*
  73  * Exit codes used by fsck-type programs
  74  */
  75 #define FSCK_OK          0      /* No errors */
  76 #define FSCK_NONDESTRUCT 1      /* File system errors corrected */
  77 #define FSCK_REBOOT      2      /* System should be rebooted */
  78 #define FSCK_UNCORRECTED 4      /* File system errors left uncorrected */
  79 #define FSCK_ERROR       8      /* Operational error */
  80 #define FSCK_USAGE       16     /* Usage or syntax error */
  81 #define FSCK_CANCELED    32     /* Aborted with a signal or ^C */
  82 #define FSCK_LIBRARY     128    /* Shared library error */
  83
  84 /*
  85  * The last ext2fs revision level that this version of e2fsck is able to
  86  * support
  87  */
  88 #define E2FSCK_CURRENT_REV      1
  89
  90 /*
  91  * The directory information structure; stores directory information
  92  * collected in earlier passes, to avoid disk i/o in fetching the
  93  * directory information.
  94  */
  95 struct dir_info {
  96         ext2_ino_t              ino;    /* Inode number */
  97         ext2_ino_t              dotdot; /* Parent according to '..' */
  98         ext2_ino_t              parent; /* Parent according to treewalk */
  99 };
 100
 101
 102 /*
 103  * The indexed directory information structure; stores information for
 104  * directories which contain a hash tree index.
 105  */
 106 struct dx_dir_info {
 107         ext2_ino_t              ino;            /* Inode number */
 108         int                     numblocks;      /* number of blocks */
 109         int                     hashversion;
 110         short                   depth;          /* depth of tree */
 111         struct dx_dirblock_info *dx_block;      /* Array of size numblocks */
 112         int                     casefolded_hash;
 113 };
 114
 115 #define DX_DIRBLOCK_ROOT        1
 116 #define DX_DIRBLOCK_LEAF        2
 117 #define DX_DIRBLOCK_NODE        3
 118 #define DX_DIRBLOCK_CORRUPT     4
 119 #define DX_DIRBLOCK_CLEARED     8
 120
 121 struct dx_dirblock_info {
 122         int             type;
 123         blk64_t         phys;
 124         int             flags;
 125         blk64_t         parent;
 126         blk64_t         previous;
 127         ext2_dirhash_t  min_hash;
 128         ext2_dirhash_t  max_hash;
 129         ext2_dirhash_t  node_min_hash;
 130         ext2_dirhash_t  node_max_hash;
 131 };
 132
 133 #define DX_FLAG_REFERENCED      1
 134 #define DX_FLAG_DUP_REF         2
 135 #define DX_FLAG_FIRST           4
 136 #define DX_FLAG_LAST            8
 137
 138 #define RESOURCE_TRACK
 139
 140 #ifdef RESOURCE_TRACK
 141 /*
 142  * This structure is used for keeping track of how much resources have
 143  * been used for a particular pass of e2fsck.
 144  */
 145 struct resource_track {
 146         struct timeval time_start;
 147         struct timeval user_start;
 148         struct timeval system_start;
 149         void    *brk_start;
 150         unsigned long long bytes_read;
 151         unsigned long long bytes_written;
 152 };
 153 #endif
 154
 155 /*
 156  * E2fsck options
 157  */
 158 #define E2F_OPT_READONLY        0x0001
 159 #define E2F_OPT_PREEN           0x0002
 160 #define E2F_OPT_YES             0x0004
 161 #define E2F_OPT_NO              0x0008
 162 #define E2F_OPT_TIME            0x0010
 163 #define E2F_OPT_TIME2           0x0020
 164 #define E2F_OPT_CHECKBLOCKS     0x0040
 165 #define E2F_OPT_DEBUG           0x0080
 166 #define E2F_OPT_FORCE           0x0100
 167 #define E2F_OPT_WRITECHECK      0x0200
 168 #define E2F_OPT_COMPRESS_DIRS   0x0400
 169 #define E2F_OPT_FRAGCHECK       0x0800
 170 #define E2F_OPT_JOURNAL_ONLY    0x1000 /* only replay the journal */
 171 #define E2F_OPT_DISCARD         0x2000
 172 #define E2F_OPT_CONVERT_BMAP    0x4000 /* convert blockmap to extent */
 173 #define E2F_OPT_FIXES_ONLY      0x8000 /* skip all optimizations */
 174 #define E2F_OPT_NOOPT_EXTENTS   0x10000 /* don't optimize extents */
 175 #define E2F_OPT_ICOUNT_FULLMAP  0x20000 /* use an array for inode counts */
 176 #define E2F_OPT_UNSHARE_BLOCKS  0x40000
 177
 178 /*
 179  * E2fsck flags
 180  */
 181 #define E2F_FLAG_ABORT          0x0001 /* Abort signaled */
 182 #define E2F_FLAG_CANCEL         0x0002 /* Cancel signaled */
 183 #define E2F_FLAG_SIGNAL_MASK    (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)
 184 #define E2F_FLAG_RESTART        0x0004 /* Restart signaled */
 185 #define E2F_FLAG_RUN_RETURN     (E2F_FLAG_SIGNAL_MASK | E2F_FLAG_RESTART)
 186 #define E2F_FLAG_RESTART_LATER  0x0008 /* Restart after all iterations done */
 187 #define E2F_FLAG_SETJMP_OK      0x0010 /* Setjmp valid for abort */
 188
 189 #define E2F_FLAG_PROG_BAR       0x0020 /* Progress bar on screen */
 190 #define E2F_FLAG_PROG_SUPPRESS  0x0040 /* Progress suspended */
 191 #define E2F_FLAG_JOURNAL_INODE  0x0080 /* Create a new ext3 journal inode */
 192 #define E2F_FLAG_SB_SPECIFIED   0x0100 /* The superblock was explicitly
 193                                         * specified by the user */
 194 #define E2F_FLAG_RESTARTED      0x0200 /* E2fsck has been restarted */
 195 #define E2F_FLAG_RESIZE_INODE   0x0400 /* Request to recreate resize inode */
 196 #define E2F_FLAG_GOT_DEVSIZE    0x0800 /* Device size has been fetched */
 197 #define E2F_FLAG_EXITING        0x1000 /* E2fsck exiting due to errors */
 198 #define E2F_FLAG_TIME_INSANE    0x2000 /* Time is insane */
 199 #define E2F_FLAG_PROBLEMS_FIXED 0x4000 /* At least one problem was fixed */
 200 #define E2F_FLAG_ALLOC_OK       0x8000 /* Can we allocate blocks? */
 201
 202 #define E2F_RESET_FLAGS (E2F_FLAG_TIME_INSANE | E2F_FLAG_PROBLEMS_FIXED)
 203
 204 /*
 205  * Defines for indicating the e2fsck pass number
 206  */
 207 #define E2F_PASS_1      1
 208 #define E2F_PASS_2      2
 209 #define E2F_PASS_3      3
 210 #define E2F_PASS_4      4
 211 #define E2F_PASS_5      5
 212 #define E2F_PASS_1B     6
 213
 214 /*
 215  * Define the extended attribute refcount structure
 216  */
 217 typedef struct ea_refcount *ext2_refcount_t;
 218
 219 /*
 220  * This is the global e2fsck structure.
 221  */
 222 typedef struct e2fsck_struct *e2fsck_t;
 223
 224 #define MAX_EXTENT_DEPTH_COUNT 5
 225
 226 struct e2fsck_struct {
 227         ext2_filsys fs;
 228         const char *program_name;
 229         char *filesystem_name;
 230         char *device_name;
 231         char *io_options;
 232         FILE    *logf;
 233         char    *log_fn;
 234         int     flags;          /* E2fsck internal flags */
 235         int     options;
 236         int     blocksize;      /* blocksize */
 237         blk64_t use_superblock; /* sb requested by user */
 238         blk64_t superblock;     /* sb used to open fs */
 239         blk64_t num_blocks;     /* Total number of blocks */
 240         blk64_t free_blocks;
 241         ino_t   free_inodes;
 242         int     mount_flags;
 243         int     openfs_flags;
 244         blkid_cache blkid;      /* blkid cache */
 245
 246 #ifdef HAVE_SETJMP_H
 247         jmp_buf abort_loc;
 248 #endif
 249         unsigned long abort_code;
 250
 251         int (*progress)(e2fsck_t ctx, int pass, unsigned long cur,
 252                         unsigned long max);
 253
 254         ext2fs_inode_bitmap inode_used_map; /* Inodes which are in use */
 255         ext2fs_inode_bitmap inode_bad_map; /* Inodes which are bad somehow */
 256         ext2fs_inode_bitmap inode_dir_map; /* Inodes which are directories */
 257         ext2fs_inode_bitmap inode_bb_map; /* Inodes which are in bad blocks */
 258         ext2fs_inode_bitmap inode_imagic_map; /* AFS inodes */
 259         ext2fs_inode_bitmap inode_reg_map; /* Inodes which are regular files*/
 260
 261         ext2fs_block_bitmap block_found_map; /* Blocks which are in use */
 262         ext2fs_block_bitmap block_dup_map; /* Blks referenced more than once */
 263         ext2fs_block_bitmap block_ea_map; /* Blocks which are used by EA's */
 264
 265         /*
 266          * Inode count arrays
 267          */
 268         ext2_icount_t   inode_count;
 269         ext2_icount_t inode_link_info;
 270
 271         ext2_refcount_t refcount;
 272         ext2_refcount_t refcount_extra;
 273
 274         /*
 275          * Quota blocks and inodes to be charged for each ea block.
 276          */
 277         ext2_refcount_t ea_block_quota_blocks;
 278         ext2_refcount_t ea_block_quota_inodes;
 279
 280         /*
 281          * ea_inode references from attr entries.
 282          */
 283         ext2_refcount_t ea_inode_refs;
 284
 285         /*
 286          * Array of flags indicating whether an inode bitmap, block
 287          * bitmap, or inode table is invalid
 288          */
 289         int *invalid_inode_bitmap_flag;
 290         int *invalid_block_bitmap_flag;
 291         int *invalid_inode_table_flag;
 292         int invalid_bitmaps;    /* There are invalid bitmaps/itable */
 293
 294         /*
 295          * Block buffer
 296          */
 297         char *block_buf;
 298
 299         /*
 300          * For pass1_check_directory and pass1_get_blocks
 301          */
 302         ext2_ino_t stashed_ino;
 303         struct ext2_inode *stashed_inode;
 304
 305         /*
 306          * Location of the lost and found directory
 307          */
 308         ext2_ino_t lost_and_found;
 309         int bad_lost_and_found;
 310
 311         /*
 312          * Directory information
 313          */
 314         struct dir_info_db      *dir_info;
 315
 316         /*
 317          * Indexed directory information
 318          */
 319         int             dx_dir_info_count;
 320         int             dx_dir_info_size;
 321         struct dx_dir_info *dx_dir_info;
 322
 323         /*
 324          * Directories to hash
 325          */
 326         ext2_u32_list   dirs_to_hash;
 327
 328         /*
 329          * Tuning parameters
 330          */
 331         int process_inode_size;
 332         int inode_buffer_blocks;
 333         unsigned int htree_slack_percentage;
 334
 335         /*
 336          * ext3 journal support
 337          */
 338         io_channel      journal_io;
 339         char    *journal_name;
 340
 341         /*
 342          * Ext4 quota support
 343          */
 344         quota_ctx_t qctx;
 345 #ifdef RESOURCE_TRACK
 346         /*
 347          * For timing purposes
 348          */
 349         struct resource_track   global_rtrack;
 350 #endif
 351
 352         /*
 353          * How we display the progress update (for unix)
 354          */
 355         int progress_fd;
 356         int progress_pos;
 357         int progress_last_percent;
 358         unsigned int progress_last_time;
 359         int interactive;        /* Are we connected directly to a tty? */
 360         char start_meta[2], stop_meta[2];
 361
 362         /* File counts */
 363         __u32 fs_directory_count;
 364         __u32 fs_regular_count;
 365         __u32 fs_blockdev_count;
 366         __u32 fs_chardev_count;
 367         __u32 fs_links_count;
 368         __u32 fs_symlinks_count;
 369         __u32 fs_fast_symlinks_count;
 370         __u32 fs_fifo_count;
 371         __u32 fs_total_count;
 372         __u32 fs_badblocks_count;
 373         __u32 fs_sockets_count;
 374         __u32 fs_ind_count;
 375         __u32 fs_dind_count;
 376         __u32 fs_tind_count;
 377         __u32 fs_fragmented;
 378         __u32 fs_fragmented_dir;
 379         __u32 large_files;
 380         __u32 fs_ext_attr_inodes;
 381         __u32 fs_ext_attr_blocks;
 382         __u32 extent_depth_count[MAX_EXTENT_DEPTH_COUNT];
 383
 384         /* misc fields */
 385         time_t now;
 386         time_t time_fudge;      /* For working around buggy init scripts */
 387         int ext_attr_ver;
 388         profile_t       profile;
 389         int blocks_per_page;
 390         ext2_u32_list encrypted_dirs;
 391
 392         /* Reserve blocks for root and l+f re-creation */
 393         blk64_t root_repair_block, lnf_repair_block;
 394
 395         /*
 396          * For the use of callers of the e2fsck functions; not used by
 397          * e2fsck functions themselves.
 398          */
 399         void *priv_data;
 400         ext2fs_block_bitmap block_metadata_map; /* Metadata blocks */
 401
 402         /* How much are we allowed to readahead? */
 403         unsigned long long readahead_kb;
 404
 405         /*
 406          * Inodes to rebuild extent trees
 407          */
 408         ext2fs_inode_bitmap inodes_to_rebuild;
 409
 410         /* Undo file */
 411         char *undo_file;
 412 };
 413
 414 /* Data structures to evaluate whether an extent tree needs rebuilding. */
 415 struct extent_tree_level {
 416         unsigned int    num_extents;
 417         unsigned int    max_extents;
 418 };
 419
 420 struct extent_tree_info {
 421         ext2_ino_t ino;
 422         int force_rebuild;
 423         struct extent_tree_level        ext_info[MAX_EXTENT_DEPTH_COUNT];
 424 };
 425
 426 /* Used by the region allocation code */
 427 typedef __u64 region_addr_t;
 428 typedef struct region_struct *region_t;
 429
 430 #ifndef HAVE_STRNLEN
 431 #define strnlen(str, x) e2fsck_strnlen((str),(x))
 432 extern int e2fsck_strnlen(const char * s, int count);
 433 #endif
 434
 435 /*
 436  * Procedure declarations
 437  */
 438
 439 extern void e2fsck_pass1(e2fsck_t ctx);
 440 extern void e2fsck_pass1_dupblocks(e2fsck_t ctx, char *block_buf);
 441 extern void e2fsck_pass2(e2fsck_t ctx);
 442 extern void e2fsck_pass3(e2fsck_t ctx);
 443 extern void e2fsck_pass4(e2fsck_t ctx);
 444 extern void e2fsck_pass5(e2fsck_t ctx);
 445
 446 /* e2fsck.c */
 447 extern errcode_t e2fsck_allocate_context(e2fsck_t *ret);
 448 extern errcode_t e2fsck_reset_context(e2fsck_t ctx);
 449 extern void e2fsck_free_context(e2fsck_t ctx);
 450 extern int e2fsck_run(e2fsck_t ctx);
 451
 452
 453 /* badblock.c */
 454 extern void read_bad_blocks_file(e2fsck_t ctx, const char *bad_blocks_file,
 455                                  int replace_bad_blocks);
 456
 457 /* dirinfo.c */
 458 extern void e2fsck_add_dir_info(e2fsck_t ctx, ext2_ino_t ino, ext2_ino_t parent);
 459 extern void e2fsck_free_dir_info(e2fsck_t ctx);
 460 extern int e2fsck_get_num_dirinfo(e2fsck_t ctx);
 461 extern struct dir_info_iter *e2fsck_dir_info_iter_begin(e2fsck_t ctx);
 462 extern struct dir_info *e2fsck_dir_info_iter(e2fsck_t ctx,
 463                                              struct dir_info_iter *);
 464 extern void e2fsck_dir_info_iter_end(e2fsck_t ctx, struct dir_info_iter *);
 465 extern int e2fsck_dir_info_set_parent(e2fsck_t ctx, ext2_ino_t ino,
 466                                       ext2_ino_t parent);
 467 extern int e2fsck_dir_info_set_dotdot(e2fsck_t ctx, ext2_ino_t ino,
 468                                       ext2_ino_t dotdot);
 469 extern int e2fsck_dir_info_get_parent(e2fsck_t ctx, ext2_ino_t ino,
 470                                       ext2_ino_t *parent);
 471 extern int e2fsck_dir_info_get_dotdot(e2fsck_t ctx, ext2_ino_t ino,
 472                                       ext2_ino_t *dotdot);
 473
 474 /* dx_dirinfo.c */
 475 extern void e2fsck_add_dx_dir(e2fsck_t ctx, ext2_ino_t ino,
 476                               struct ext2_inode *inode, int num_blocks);
 477 extern struct dx_dir_info *e2fsck_get_dx_dir_info(e2fsck_t ctx, ext2_ino_t ino);
 478 extern void e2fsck_free_dx_dir_info(e2fsck_t ctx);
 479 extern int e2fsck_get_num_dx_dirinfo(e2fsck_t ctx);
 480 extern struct dx_dir_info *e2fsck_dx_dir_info_iter(e2fsck_t ctx, int *control);
 481
 482 /* ea_refcount.c */
 483 typedef __u64 ea_key_t;
 484 typedef __u64 ea_value_t;
 485
 486 extern errcode_t ea_refcount_create(size_t size, ext2_refcount_t *ret);
 487 extern void ea_refcount_free(ext2_refcount_t refcount);
 488 extern errcode_t ea_refcount_fetch(ext2_refcount_t refcount, ea_key_t ea_key,
 489                                    ea_value_t *ret);
 490 extern errcode_t ea_refcount_increment(ext2_refcount_t refcount,
 491                                        ea_key_t ea_key, ea_value_t *ret);
 492 extern errcode_t ea_refcount_decrement(ext2_refcount_t refcount,
 493                                        ea_key_t ea_key, ea_value_t *ret);
 494 extern errcode_t ea_refcount_store(ext2_refcount_t refcount, ea_key_t ea_key,
 495                                    ea_value_t count);
 496 extern size_t ext2fs_get_refcount_size(ext2_refcount_t refcount);
 497 extern void ea_refcount_intr_begin(ext2_refcount_t refcount);
 498 extern ea_key_t ea_refcount_intr_next(ext2_refcount_t refcount,
 499                                       ea_value_t *ret);
 500
 501 /* ehandler.c */
 502 extern const char *ehandler_operation(const char *op);
 503 extern void ehandler_init(io_channel channel);
 504
 505 /* extents.c */
 506 struct problem_context;
 507 errcode_t e2fsck_rebuild_extents_later(e2fsck_t ctx, ext2_ino_t ino);
 508 int e2fsck_ino_will_be_rebuilt(e2fsck_t ctx, ext2_ino_t ino);
 509 void e2fsck_pass1e(e2fsck_t ctx);
 510 errcode_t e2fsck_check_rebuild_extents(e2fsck_t ctx, ext2_ino_t ino,
 511                                        struct ext2_inode *inode,
 512                                        struct problem_context *pctx);
 513 errcode_t e2fsck_should_rebuild_extents(e2fsck_t ctx,
 514                                         struct problem_context *pctx,
 515                                         struct extent_tree_info *eti,
 516                                         struct ext2_extent_info *info);
 517
 518 /* journal.c */
 519 extern errcode_t e2fsck_check_ext3_journal(e2fsck_t ctx);
 520 extern errcode_t e2fsck_run_ext3_journal(e2fsck_t ctx);
 521 extern void e2fsck_move_ext3_journal(e2fsck_t ctx);
 522 extern int e2fsck_fix_ext3_journal_hint(e2fsck_t ctx);
 523
 524 /* logfile.c */
 525 extern void set_up_logging(e2fsck_t ctx);
 526
 527 /* quota.c */
 528 extern void e2fsck_hide_quota(e2fsck_t ctx);
 529 extern void e2fsck_validate_quota_inodes(e2fsck_t ctx);
 530
 531 /* pass1.c */
 532 extern errcode_t e2fsck_setup_icount(e2fsck_t ctx, const char *icount_name,
 533                                      int flags, ext2_icount_t hint,
 534                                      ext2_icount_t *ret);
 535 extern void e2fsck_use_inode_shortcuts(e2fsck_t ctx, int use_shortcuts);
 536 extern int e2fsck_pass1_check_device_inode(ext2_filsys fs,
 537                                            struct ext2_inode *inode);
 538 extern int e2fsck_pass1_check_symlink(ext2_filsys fs, ext2_ino_t ino,
 539                                       struct ext2_inode *inode, char *buf);
 540 extern void e2fsck_clear_inode(e2fsck_t ctx, ext2_ino_t ino,
 541                                struct ext2_inode *inode, int restart_flag,
 542                                const char *source);
 543 extern void e2fsck_intercept_block_allocations(e2fsck_t ctx);
 544
 545 /* pass2.c */
 546 extern int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
 547                                     ext2_ino_t ino, char *buf);
 548
 549 /* pass3.c */
 550 extern int e2fsck_reconnect_file(e2fsck_t ctx, ext2_ino_t inode);
 551 extern errcode_t e2fsck_expand_directory(e2fsck_t ctx, ext2_ino_t dir,
 552                                          int num, int gauranteed_size);
 553 extern ext2_ino_t e2fsck_get_lost_and_found(e2fsck_t ctx, int fix);
 554 extern errcode_t e2fsck_adjust_inode_count(e2fsck_t ctx, ext2_ino_t ino,
 555                                            int adj);
 556
 557 /* readahead.c */
 558 #define E2FSCK_READA_SUPER      (0x01)
 559 #define E2FSCK_READA_GDT        (0x02)
 560 #define E2FSCK_READA_BBITMAP    (0x04)
 561 #define E2FSCK_READA_IBITMAP    (0x08)
 562 #define E2FSCK_READA_ITABLE     (0x10)
 563 #define E2FSCK_READA_ALL_FLAGS  (0x1F)
 564 errcode_t e2fsck_readahead(ext2_filsys fs, int flags, dgrp_t start,
 565                            dgrp_t ngroups);
 566 #define E2FSCK_RA_DBLIST_IGNORE_BLOCKCNT        (0x01)
 567 #define E2FSCK_RA_DBLIST_ALL_FLAGS              (0x01)
 568 errcode_t e2fsck_readahead_dblist(ext2_filsys fs, int flags,
 569                                   ext2_dblist dblist,
 570                                   unsigned long long start,
 571                                   unsigned long long count);
 572 int e2fsck_can_readahead(ext2_filsys fs);
 573 unsigned long long e2fsck_guess_readahead(ext2_filsys fs);
 574
 575 /* region.c */
 576 extern region_t region_create(region_addr_t min, region_addr_t max);
 577 extern void region_free(region_t region);
 578 extern int region_allocate(region_t region, region_addr_t start, int n);
 579
 580 /* rehash.c */
 581 void e2fsck_rehash_dir_later(e2fsck_t ctx, ext2_ino_t ino);
 582 int e2fsck_dir_will_be_rehashed(e2fsck_t ctx, ext2_ino_t ino);
 583 errcode_t e2fsck_rehash_dir(e2fsck_t ctx, ext2_ino_t ino,
 584                             struct problem_context *pctx);
 585 void e2fsck_rehash_directories(e2fsck_t ctx);
 586
 587 /* sigcatcher.c */
 588 void sigcatcher_setup(void);
 589
 590 /* super.c */
 591 void check_super_block(e2fsck_t ctx);
 592 int check_backup_super_block(e2fsck_t ctx);
 593 void check_resize_inode(e2fsck_t ctx);
 594
 595 /* util.c */
 596 extern void *e2fsck_allocate_memory(e2fsck_t ctx, unsigned int size,
 597                                     const char *description);
 598 extern int ask(e2fsck_t ctx, const char * string, int def);
 599 extern int ask_yn(e2fsck_t ctx, const char * string, int def);
 600 extern void fatal_error(e2fsck_t ctx, const char * fmt_string);
 601 extern void log_out(e2fsck_t ctx, const char *fmt, ...)
 602         E2FSCK_ATTR((format(printf, 2, 3)));
 603 extern void log_err(e2fsck_t ctx, const char *fmt, ...)
 604         E2FSCK_ATTR((format(printf, 2, 3)));
 605 extern void e2fsck_read_bitmaps(e2fsck_t ctx);
 606 extern void e2fsck_write_bitmaps(e2fsck_t ctx);
 607 extern void preenhalt(e2fsck_t ctx);
 608 extern char *string_copy(e2fsck_t ctx, const char *str, int len);
 609 extern int fs_proc_check(const char *fs_name);
 610 extern int check_for_modules(const char *fs_name);
 611 #ifdef RESOURCE_TRACK
 612 extern void print_resource_track(e2fsck_t ctx,
 613                                  const char *desc,
 614                                  struct resource_track *track,
 615                                  io_channel channel);
 616 extern void init_resource_track(struct resource_track *track,
 617                                 io_channel channel);
 618 #else
 619 #define print_resource_track(ctx, desc, track, channel) do { } while (0)
 620 #define init_resource_track(track, channel) do { } while (0)
 621 #endif
 622 extern int inode_has_valid_blocks(struct ext2_inode *inode);
 623 extern void e2fsck_read_inode(e2fsck_t ctx, unsigned long ino,
 624                               struct ext2_inode * inode, const char * proc);
 625 extern void e2fsck_read_inode_full(e2fsck_t ctx, unsigned long ino,
 626                                    struct ext2_inode *inode,
 627                                    const int bufsize, const char *proc);
 628 extern void e2fsck_write_inode(e2fsck_t ctx, unsigned long ino,
 629                                struct ext2_inode * inode, const char * proc);
 630 extern void e2fsck_write_inode_full(e2fsck_t ctx, unsigned long ino,
 631                                struct ext2_inode * inode, int bufsize,
 632                                const char *proc);
 633 #ifdef MTRACE
 634 extern void mtrace_print(char *mesg);
 635 #endif
 636 extern blk64_t get_backup_sb(e2fsck_t ctx, ext2_filsys fs,
 637                            const char *name, io_manager manager);
 638 extern int ext2_file_type(unsigned int mode);
 639 extern int write_all(int fd, char *buf, size_t count);
 640 void dump_mmp_msg(struct mmp_struct *mmp, const char *fmt, ...)
 641         E2FSCK_ATTR((format(printf, 2, 3)));
 642 errcode_t e2fsck_mmp_update(ext2_filsys fs);
 643
 644 extern void e2fsck_set_bitmap_type(ext2_filsys fs,
 645                                    unsigned int default_type,
 646                                    const char *profile_name,
 647                                    unsigned int *old_type);
 648 extern errcode_t e2fsck_allocate_inode_bitmap(ext2_filsys fs,
 649                                               const char *descr,
 650                                               int default_type,
 651                                               const char *profile_name,
 652                                               ext2fs_inode_bitmap *ret);
 653 extern errcode_t e2fsck_allocate_block_bitmap(ext2_filsys fs,
 654                                               const char *descr,
 655                                               int default_type,
 656                                               const char *profile_name,
 657                                               ext2fs_block_bitmap *ret);
 658 extern errcode_t e2fsck_allocate_subcluster_bitmap(ext2_filsys fs,
 659                                                    const char *descr,
 660                                                    int default_type,
 661                                                    const char *profile_name,
 662                                                    ext2fs_block_bitmap *ret);
 663 unsigned long long get_memory_size(void);
 664
 665 /* unix.c */
 666 extern void e2fsck_clear_progbar(e2fsck_t ctx);
 667 extern int e2fsck_simple_progress(e2fsck_t ctx, const char *label,
 668                                   float percent, unsigned int dpynum);
 669
 670 #define DIV_ROUND_UP(n,d) (((n) + (d) - 1) / (d))
 671
 672 #endif /* _E2FSCK_H */