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