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