int main (int argc, char *argv[])
{
	errcode_t	retval = 0, retval2 = 0, orig_retval = 0;
	int		exit_value = FSCK_OK;
	ext2_filsys	fs = 0;
	io_manager	io_ptr;
	struct ext2_super_block *sb;
	const char	*lib_ver_date;
	int		my_ver, lib_ver;
	e2fsck_t	ctx;
	blk_t		orig_superblock;
	struct problem_context pctx;
	int flags, run_result;
	int journal_size;
	int sysval, sys_page_size = 4096;
	int old_bitmaps;
	__u32 features[3];
	char *cp;

	clear_problem_context(&pctx);
#ifdef MTRACE
	mtrace();
#endif
#ifdef MCHECK
	mcheck(0);
#endif
#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
#endif
	my_ver = ext2fs_parse_version_string(my_ver_string);
	lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
	if (my_ver > lib_ver) {
		fprintf( stderr, _("Error: ext2fs library version "
			"out of date!\n"));
		show_version_only++;
	}

	retval = PRS(argc, argv, &ctx);
	if (retval) {
		com_err("e2fsck", retval,
			_("while trying to initialize program"));
		exit(FSCK_ERROR);
	}
	reserve_stdio_fds();

	init_resource_track(&ctx->global_rtrack, NULL);
	if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
		fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string,
			 my_ver_date);

	if (show_version_only) {
		fprintf(stderr, _("\tUsing %s, %s\n"),
			error_message(EXT2_ET_BASE), lib_ver_date);
		exit(FSCK_OK);
	}

	check_mount(ctx);

	if (!(ctx->options & E2F_OPT_PREEN) &&
	    !(ctx->options & E2F_OPT_NO) &&
	    !(ctx->options & E2F_OPT_YES)) {
		if (!ctx->interactive)
			fatal_error(ctx,
				    _("need terminal for interactive repairs"));
	}
	ctx->superblock = ctx->use_superblock;
restart:
#ifdef CONFIG_TESTIO_DEBUG
	if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
		io_ptr = test_io_manager;
		test_io_backing_manager = unix_io_manager;
	} else
#endif
		io_ptr = unix_io_manager;
	flags = EXT2_FLAG_NOFREE_ON_ERROR;
	profile_get_boolean(ctx->profile, "options", "old_bitmaps", 0, 0,
			    &old_bitmaps);
	if (!old_bitmaps)
		flags |= EXT2_FLAG_64BITS;
	if ((ctx->options & E2F_OPT_READONLY) == 0)
		flags |= EXT2_FLAG_RW;
	if ((ctx->mount_flags & EXT2_MF_MOUNTED) == 0)
		flags |= EXT2_FLAG_EXCLUSIVE;

	retval = try_open_fs(ctx, flags, io_ptr, &fs);

	if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
	    !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
	    ((retval == EXT2_ET_BAD_MAGIC) ||
	     (retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
	     ((retval == 0) && (retval2 = ext2fs_check_desc(fs))))) {
		if (retval2 == ENOMEM) {
			retval = retval2;
			goto failure;
		}
		if (fs->flags & EXT2_FLAG_NOFREE_ON_ERROR) {
			ext2fs_free(fs);
			fs = NULL;
		}
		if (!fs || (fs->group_desc_count > 1)) {
			printf(_("%s: %s trying backup blocks...\n"),
			       ctx->program_name,
			       retval ? _("Superblock invalid,") :
			       _("Group descriptors look bad..."));
			orig_superblock = ctx->superblock;
			get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
			if (fs)
				ext2fs_close(fs);
			orig_retval = retval;
			retval = try_open_fs(ctx, flags, io_ptr, &fs);
			if ((orig_retval == 0) && retval != 0) {
				if (fs)
					ext2fs_close(fs);
				com_err(ctx->program_name, retval,
					"when using the backup blocks");
				printf(_("%s: going back to original "
					 "superblock\n"), ctx->program_name);
				ctx->superblock = orig_superblock;
				retval = try_open_fs(ctx, flags, io_ptr, &fs);
			}
		}
	}
	if (((retval == EXT2_ET_UNSUPP_FEATURE) ||
	     (retval == EXT2_ET_RO_UNSUPP_FEATURE)) &&
	    fs && fs->super) {
		sb = fs->super;
		features[0] = (sb->s_feature_compat &
			       ~EXT2_LIB_FEATURE_COMPAT_SUPP);
		features[1] = (sb->s_feature_incompat &
			       ~EXT2_LIB_FEATURE_INCOMPAT_SUPP);
		features[2] = (sb->s_feature_ro_compat &
			       ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
		if (features[0] || features[1] || features[2])
			goto print_unsupp_features;
	}
failure:
	if (retval) {
		if (orig_retval)
			retval = orig_retval;
		com_err(ctx->program_name, retval, _("while trying to open %s"),
			ctx->filesystem_name);
		if (retval == EXT2_ET_REV_TOO_HIGH) {
			printf(_("The filesystem revision is apparently "
			       "too high for this version of e2fsck.\n"
			       "(Or the filesystem superblock "
			       "is corrupt)\n\n"));
			fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
		} else if (retval == EXT2_ET_SHORT_READ)
			printf(_("Could this be a zero-length partition?\n"));
		else if ((retval == EPERM) || (retval == EACCES))
			printf(_("You must have %s access to the "
			       "filesystem or be root\n"),
			       (ctx->options & E2F_OPT_READONLY) ?
			       "r/o" : "r/w");
		else if (retval == ENXIO)
			printf(_("Possibly non-existent or swap device?\n"));
		else if (retval == EBUSY)
			printf(_("Filesystem mounted or opened exclusively "
				 "by another program?\n"));
		else if (retval == ENOENT)
			printf(_("Possibly non-existent device?\n"));
#ifdef EROFS
		else if (retval == EROFS)
			printf(_("Disk write-protected; use the -n option "
			       "to do a read-only\n"
			       "check of the device.\n"));
#endif
		else
			fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
		fatal_error(ctx, 0);
	}
	/*
	 * We only update the master superblock because (a) paranoia;
	 * we don't want to corrupt the backup superblocks, and (b) we
	 * don't need to update the mount count and last checked
	 * fields in the backup superblock (the kernel doesn't update
	 * the backup superblocks anyway).  With newer versions of the
	 * library this flag is set by ext2fs_open2(), but we set this
	 * here just to be sure.  (No, we don't support e2fsck running
	 * with some other libext2fs than the one that it was shipped
	 * with, but just in case....)
	 */
	fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;

	if (!(ctx->flags & E2F_FLAG_GOT_DEVSIZE)) {
		__u32 blocksize = EXT2_BLOCK_SIZE(fs->super);
		int need_restart = 0;

		pctx.errcode = ext2fs_get_device_size(ctx->filesystem_name,
						       blocksize,
						       &ctx->num_blocks);
		/*
		 * The floppy driver refuses to allow anyone else to
		 * open the device if has been opened with O_EXCL;
		 * this is unlike other block device drivers in Linux.
		 * To handle this, we close the filesystem and then
		 * reopen the filesystem after we get the device size.
		 */
		if (pctx.errcode == EBUSY) {
			ext2fs_close(fs);
			need_restart++;
			pctx.errcode =
				ext2fs_get_device_size(ctx->filesystem_name,
							blocksize,
							&ctx->num_blocks);
		}
		if (pctx.errcode == EXT2_ET_UNIMPLEMENTED)
			ctx->num_blocks = 0;
		else if (pctx.errcode) {
			fix_problem(ctx, PR_0_GETSIZE_ERROR, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			fatal_error(ctx, 0);
		}
		ctx->flags |= E2F_FLAG_GOT_DEVSIZE;
		if (need_restart)
			goto restart;
	}

	ctx->fs = fs;
	fs->priv_data = ctx;
	fs->now = ctx->now;
	sb = fs->super;
	if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
		com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
			_("while trying to open %s"),
			ctx->filesystem_name);
	get_newer:
		fatal_error(ctx, _("Get a newer version of e2fsck!"));
	}

	/*
	 * Set the device name, which is used whenever we print error
	 * or informational messages to the user.
	 */
	if (ctx->device_name == 0 &&
	    (sb->s_volume_name[0] != 0)) {
		ctx->device_name = string_copy(ctx, sb->s_volume_name,
					       sizeof(sb->s_volume_name));
	}
	if (ctx->device_name == 0)
		ctx->device_name = string_copy(ctx, ctx->filesystem_name, 0);
	for (cp = ctx->device_name; *cp; cp++)
		if (isspace(*cp) || *cp == ':')
			*cp = '_';

	ehandler_init(fs->io);

	if ((ctx->mount_flags & EXT2_MF_MOUNTED) &&
	    !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER))
		goto skip_journal;

	/*
	 * Make sure the ext3 superblock fields are consistent.
	 */
	retval = e2fsck_check_ext3_journal(ctx);
	if (retval) {
		com_err(ctx->program_name, retval,
			_("while checking ext3 journal for %s"),
			ctx->device_name);
		fatal_error(ctx, 0);
	}

	/*
	 * Check to see if we need to do ext3-style recovery.  If so,
	 * do it, and then restart the fsck.
	 */
	if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
		if (ctx->options & E2F_OPT_READONLY) {
			printf(_("Warning: skipping journal recovery "
				 "because doing a read-only filesystem "
				 "check.\n"));
			io_channel_flush(ctx->fs->io);
		} else {
			if (ctx->flags & E2F_FLAG_RESTARTED) {
				/*
				 * Whoops, we attempted to run the
				 * journal twice.  This should never
				 * happen, unless the hardware or
				 * device driver is being bogus.
				 */
				com_err(ctx->program_name, 0,
					_("unable to set superblock flags on %s\n"), ctx->device_name);
				fatal_error(ctx, 0);
			}
			retval = e2fsck_run_ext3_journal(ctx);
			if (retval) {
				com_err(ctx->program_name, retval,
				_("while recovering ext3 journal of %s"),
					ctx->device_name);
				fatal_error(ctx, 0);
			}
			ext2fs_close(ctx->fs);
			ctx->fs = 0;
			ctx->flags |= E2F_FLAG_RESTARTED;
			goto restart;
		}
	}

skip_journal:
	/*
	 * Check for compatibility with the feature sets.  We need to
	 * be more stringent than ext2fs_open().
	 */
	features[0] = sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP;
	features[1] = sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP;
	features[2] = (sb->s_feature_ro_compat &
		       ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP);
print_unsupp_features:
	if (features[0] || features[1] || features[2]) {
		int	i, j;
		__u32	*mask = features, m;

		fprintf(stderr, _("%s has unsupported feature(s):"),
			ctx->filesystem_name);

		for (i=0; i <3; i++,mask++) {
			for (j=0,m=1; j < 32; j++, m<<=1) {
				if (*mask & m)
					fprintf(stderr, " %s",
						e2p_feature2string(i, m));
			}
		}
		putc('\n', stderr);
		goto get_newer;
	}
#ifdef ENABLE_COMPRESSION
	if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
		com_err(ctx->program_name, 0,
			_("Warning: compression support is experimental.\n"));
#endif
#ifndef ENABLE_HTREE
	if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
		com_err(ctx->program_name, 0,
			_("E2fsck not compiled with HTREE support,\n\t"
			  "but filesystem %s has HTREE directories.\n"),
			ctx->device_name);
		goto get_newer;
	}
#endif

	/*
	 * If the user specified a specific superblock, presumably the
	 * master superblock has been trashed.  So we mark the
	 * superblock as dirty, so it can be written out.
	 */
	if (ctx->superblock &&
	    !(ctx->options & E2F_OPT_READONLY))
		ext2fs_mark_super_dirty(fs);

	/*
	 * Calculate the number of filesystem blocks per pagesize.  If
	 * fs->blocksize > page_size, set the number of blocks per
	 * pagesize to 1 to avoid division by zero errors.
	 */
#ifdef _SC_PAGESIZE
	sysval = sysconf(_SC_PAGESIZE);
	if (sysval > 0)
		sys_page_size = sysval;
#endif /* _SC_PAGESIZE */
	ctx->blocks_per_page = sys_page_size / fs->blocksize;
	if (ctx->blocks_per_page == 0)
		ctx->blocks_per_page = 1;

	if (ctx->superblock)
		set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
	ext2fs_mark_valid(fs);
	check_super_block(ctx);
	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
		fatal_error(ctx, 0);
	check_if_skip(ctx);
	check_resize_inode(ctx);
	if (bad_blocks_file)
		read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
	else if (cflag)
		read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
		fatal_error(ctx, 0);

	/*
	 * Mark the system as valid, 'til proven otherwise
	 */
	ext2fs_mark_valid(fs);

	retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
	if (retval) {
		com_err(ctx->program_name, retval,
			_("while reading bad blocks inode"));
		preenhalt(ctx);
		printf(_("This doesn't bode well,"
			 " but we'll try to go on...\n"));
	}

	/*
	 * Save the journal size in megabytes.
	 * Try and use the journal size from the backup else let e2fsck
	 * find the default journal size.
	 */
	if (sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS)
		journal_size = sb->s_jnl_blocks[16] >> 20;
	else
Exemple #2
0
void e2fsck_pass2(e2fsck_t ctx)
{
    struct ext2_super_block *sb = ctx->fs->super;
    struct problem_context	pctx;
    ext2_filsys 		fs = ctx->fs;
    char			*buf;
#ifdef RESOURCE_TRACK
    struct resource_track	rtrack;
#endif
    struct dir_info 	*dir;
    struct check_dir_struct cd;

#ifdef RESOURCE_TRACK
    init_resource_track(&rtrack);
#endif

    clear_problem_context(&cd.pctx);

#ifdef MTRACE
    mtrace_print("Pass 2");
#endif

    if (!(ctx->options & E2F_OPT_PREEN))
        fix_problem(ctx, PR_2_PASS_HEADER, &cd.pctx);

    cd.pctx.errcode = ext2fs_create_icount2(fs, EXT2_ICOUNT_OPT_INCREMENT,
                                            0, ctx->inode_link_info,
                                            &ctx->inode_count);
    if (cd.pctx.errcode) {
        fix_problem(ctx, PR_2_ALLOCATE_ICOUNT, &cd.pctx);
        ctx->flags |= E2F_FLAG_ABORT;
        return;
    }
    buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize,
                                          "directory scan buffer");

    /*
     * Set up the parent pointer for the root directory, if
     * present.  (If the root directory is not present, we will
     * create it in pass 3.)
     */
    dir = e2fsck_get_dir_info(ctx, EXT2_ROOT_INO);
    if (dir)
        dir->parent = EXT2_ROOT_INO;

    cd.buf = buf;
    cd.ctx = ctx;
    cd.count = 1;
    cd.max = ext2fs_dblist_count(fs->dblist);

    if (ctx->progress)
        (void) (ctx->progress)(ctx, 2, 0, cd.max);

    cd.pctx.errcode = ext2fs_dblist_iterate(fs->dblist, check_dir_block,
                                            &cd);
    if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
        return;
    if (cd.pctx.errcode) {
        fix_problem(ctx, PR_2_DBLIST_ITERATE, &cd.pctx);
        ctx->flags |= E2F_FLAG_ABORT;
        return;
    }

    ext2fs_free_mem((void **) &buf);
    ext2fs_free_dblist(fs->dblist);

    if (ctx->inode_bad_map) {
        ext2fs_free_inode_bitmap(ctx->inode_bad_map);
        ctx->inode_bad_map = 0;
    }
    if (ctx->inode_reg_map) {
        ext2fs_free_inode_bitmap(ctx->inode_reg_map);
        ctx->inode_reg_map = 0;
    }

    clear_problem_context(&pctx);
    if (ctx->large_files) {
        if (!(sb->s_feature_ro_compat &
                EXT2_FEATURE_RO_COMPAT_LARGE_FILE) &&
                fix_problem(ctx, PR_2_FEATURE_LARGE_FILES, &pctx)) {
            sb->s_feature_ro_compat |=
                EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
            ext2fs_mark_super_dirty(fs);
        }
        if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
                fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
            ext2fs_update_dynamic_rev(fs);
            ext2fs_mark_super_dirty(fs);
        }
    } else if (!ctx->large_files &&
               (sb->s_feature_ro_compat &
                EXT2_FEATURE_RO_COMPAT_LARGE_FILE)) {
        if (fs->flags & EXT2_FLAG_RW) {
            sb->s_feature_ro_compat &=
                ~EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
            ext2fs_mark_super_dirty(fs);
        }
    }

#ifdef RESOURCE_TRACK
    if (ctx->options & E2F_OPT_TIME2) {
        e2fsck_clear_progbar(ctx);
        print_resource_track("Pass 2", &rtrack);
    }
#endif
}
Exemple #3
0
/*
 * This function makes sure that the superblock fields regarding the
 * journal are consistent.
 */
errcode_t e2fsck_check_ext3_journal(e2fsck_t ctx)
{
	struct ext2_super_block *sb = ctx->fs->super;
	journal_t *journal;
	int recover = ctx->fs->super->s_feature_incompat &
		EXT3_FEATURE_INCOMPAT_RECOVER;
	struct problem_context pctx;
	problem_t problem;
	int reset = 0, force_fsck = 0;
	errcode_t retval;

	/* If we don't have any journal features, don't do anything more */
	if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL) &&
	    !recover && sb->s_journal_inum == 0 && sb->s_journal_dev == 0 &&
	    uuid_is_null(sb->s_journal_uuid))
 		return 0;

	clear_problem_context(&pctx);
	pctx.num = sb->s_journal_inum;

	retval = e2fsck_get_journal(ctx, &journal);
	if (retval) {
		if ((retval == EXT2_ET_BAD_INODE_NUM) ||
		    (retval == EXT2_ET_BAD_BLOCK_NUM) ||
		    (retval == EXT2_ET_JOURNAL_TOO_SMALL) ||
		    (retval == EXT2_ET_NO_JOURNAL))
			return e2fsck_journal_fix_bad_inode(ctx, &pctx);
		return retval;
	}

	retval = e2fsck_journal_load(journal);
	if (retval) {
		if ((retval == EXT2_ET_CORRUPT_SUPERBLOCK) ||
		    ((retval == EXT2_ET_UNSUPP_FEATURE) &&
		    (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_INCOMPAT,
				  &pctx))) ||
		    ((retval == EXT2_ET_RO_UNSUPP_FEATURE) &&
		    (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_ROCOMPAT,
				  &pctx))) ||
		    ((retval == EXT2_ET_JOURNAL_UNSUPP_VERSION) &&
		    (!fix_problem(ctx, PR_0_JOURNAL_UNSUPP_VERSION, &pctx))))
			retval = e2fsck_journal_fix_corrupt_super(ctx, journal,
								  &pctx);
		e2fsck_journal_release(ctx, journal, 0, 1);
		return retval;
	}

	/*
	 * We want to make the flags consistent here.  We will not leave with
	 * needs_recovery set but has_journal clear.  We can't get in a loop
	 * with -y, -n, or -p, only if a user isn't making up their mind.
	 */
no_has_journal:
	if (!(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL)) {
		recover = sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER;
		if (fix_problem(ctx, PR_0_JOURNAL_HAS_JOURNAL, &pctx)) {
			if (recover &&
			    !fix_problem(ctx, PR_0_JOURNAL_RECOVER_SET, &pctx))
				goto no_has_journal;
			/*
			 * Need a full fsck if we are releasing a
			 * journal stored on a reserved inode.
			 */
			force_fsck = recover ||
				(sb->s_journal_inum < EXT2_FIRST_INODE(sb));
			/* Clear all of the journal fields */
			sb->s_journal_inum = 0;
			sb->s_journal_dev = 0;
			memset(sb->s_journal_uuid, 0,
			       sizeof(sb->s_journal_uuid));
			e2fsck_clear_recover(ctx, force_fsck);
		} else if (!(ctx->options & E2F_OPT_READONLY)) {
			sb->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL;
			ctx->fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
			ext2fs_mark_super_dirty(ctx->fs);
		}
	}

	if (sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL &&
	    !(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) &&
	    journal->j_superblock->s_start != 0) {
		/* Print status information */
		fix_problem(ctx, PR_0_JOURNAL_RECOVERY_CLEAR, &pctx);
		if (ctx->superblock)
			problem = PR_0_JOURNAL_RUN_DEFAULT;
		else
			problem = PR_0_JOURNAL_RUN;
		if (fix_problem(ctx, problem, &pctx)) {
			ctx->options |= E2F_OPT_FORCE;
			sb->s_feature_incompat |=
				EXT3_FEATURE_INCOMPAT_RECOVER;
			ext2fs_mark_super_dirty(ctx->fs);
		} else if (fix_problem(ctx,
				       PR_0_JOURNAL_RESET_JOURNAL, &pctx)) {
			reset = 1;
			sb->s_state &= ~EXT2_VALID_FS;
			ext2fs_mark_super_dirty(ctx->fs);
		}
		/*
		 * If the user answers no to the above question, we
		 * ignore the fact that journal apparently has data;
		 * accidentally replaying over valid data would be far
		 * worse than skipping a questionable recovery.
		 *
		 * XXX should we abort with a fatal error here?  What
		 * will the ext3 kernel code do if a filesystem with
		 * !NEEDS_RECOVERY but with a non-zero
		 * journal->j_superblock->s_start is mounted?
		 */
	}

	/*
	 * If we don't need to do replay the journal, check to see if
	 * the journal's errno is set; if so, we need to mark the file
	 * system as being corrupt and clear the journal's s_errno.
	 */
	if (!(sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) &&
	    journal->j_superblock->s_errno) {
		ctx->fs->super->s_state |= EXT2_ERROR_FS;
		ext2fs_mark_super_dirty(ctx->fs);
		journal->j_superblock->s_errno = 0;
		e2fsck_journal_sb_csum_set(journal, journal->j_superblock);
		mark_buffer_dirty(journal->j_sb_buffer);
	}

	e2fsck_journal_release(ctx, journal, reset, 0);
	return retval;
}
Exemple #4
0
void e2fsck_pass2(e2fsck_t ctx)
{
	struct ext2_super_block *sb = ctx->fs->super;
	struct problem_context	pctx;
	ext2_filsys 		fs = ctx->fs;
	char			*buf;
#ifdef RESOURCE_TRACK
	struct resource_track	rtrack;
#endif
	struct check_dir_struct cd;
	struct dx_dir_info	*dx_dir;
	struct dx_dirblock_info	*dx_db, *dx_parent;
	unsigned int		save_type;
	int			b;
	int			i, depth;
	problem_t		code;
	int			bad_dir;

	init_resource_track(&rtrack, ctx->fs->io);
	clear_problem_context(&cd.pctx);

#ifdef MTRACE
	mtrace_print("Pass 2");
#endif

	if (!(ctx->options & E2F_OPT_PREEN))
		fix_problem(ctx, PR_2_PASS_HEADER, &cd.pctx);

	e2fsck_setup_tdb_icount(ctx, EXT2_ICOUNT_OPT_INCREMENT,
				&ctx->inode_count);
	if (ctx->inode_count)
		cd.pctx.errcode = 0;
	else {
		e2fsck_set_bitmap_type(fs, EXT2FS_BMAP64_RBTREE,
				       "inode_count", &save_type);
		cd.pctx.errcode = ext2fs_create_icount2(fs,
						EXT2_ICOUNT_OPT_INCREMENT,
						0, ctx->inode_link_info,
						&ctx->inode_count);
		fs->default_bitmap_type = save_type;
	}
	if (cd.pctx.errcode) {
		fix_problem(ctx, PR_2_ALLOCATE_ICOUNT, &cd.pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}
	buf = (char *) e2fsck_allocate_memory(ctx, 2*fs->blocksize,
					      "directory scan buffer");

	/*
	 * Set up the parent pointer for the root directory, if
	 * present.  (If the root directory is not present, we will
	 * create it in pass 3.)
	 */
	(void) e2fsck_dir_info_set_parent(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO);

	cd.buf = buf;
	cd.ctx = ctx;
	cd.count = 1;
	cd.max = ext2fs_dblist_count2(fs->dblist);

	if (ctx->progress)
		(void) (ctx->progress)(ctx, 2, 0, cd.max);

	if (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX)
		ext2fs_dblist_sort2(fs->dblist, special_dir_block_cmp);

	cd.pctx.errcode = ext2fs_dblist_iterate2(fs->dblist, check_dir_block,
						 &cd);
	if (ctx->flags & E2F_FLAG_SIGNAL_MASK || ctx->flags & E2F_FLAG_RESTART)
		return;

	if (ctx->flags & E2F_FLAG_RESTART_LATER) {
		ctx->flags |= E2F_FLAG_RESTART;
		return;
	}

	if (cd.pctx.errcode) {
		fix_problem(ctx, PR_2_DBLIST_ITERATE, &cd.pctx);
		ctx->flags |= E2F_FLAG_ABORT;
		return;
	}

#ifdef ENABLE_HTREE
	for (i=0; (dx_dir = e2fsck_dx_dir_info_iter(ctx, &i)) != 0;) {
		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
			return;
		if (dx_dir->numblocks == 0)
			continue;
		clear_problem_context(&pctx);
		bad_dir = 0;
		pctx.dir = dx_dir->ino;
		dx_db = dx_dir->dx_block;
		if (dx_db->flags & DX_FLAG_REFERENCED)
			dx_db->flags |= DX_FLAG_DUP_REF;
		else
			dx_db->flags |= DX_FLAG_REFERENCED;
		/*
		 * Find all of the first and last leaf blocks, and
		 * update their parent's min and max hash values
		 */
		for (b=0, dx_db = dx_dir->dx_block;
		     b < dx_dir->numblocks;
		     b++, dx_db++) {
			if ((dx_db->type != DX_DIRBLOCK_LEAF) ||
			    !(dx_db->flags & (DX_FLAG_FIRST | DX_FLAG_LAST)))
				continue;
			dx_parent = &dx_dir->dx_block[dx_db->parent];
			/*
			 * XXX Make sure dx_parent->min_hash > dx_db->min_hash
			 */
			if (dx_db->flags & DX_FLAG_FIRST)
				dx_parent->min_hash = dx_db->min_hash;
			/*
			 * XXX Make sure dx_parent->max_hash < dx_db->max_hash
			 */
			if (dx_db->flags & DX_FLAG_LAST)
				dx_parent->max_hash = dx_db->max_hash;
		}

		for (b=0, dx_db = dx_dir->dx_block;
		     b < dx_dir->numblocks;
		     b++, dx_db++) {
			pctx.blkcount = b;
			pctx.group = dx_db->parent;
			code = 0;
			if (!(dx_db->flags & DX_FLAG_FIRST) &&
			    (dx_db->min_hash < dx_db->node_min_hash)) {
				pctx.blk = dx_db->min_hash;
				pctx.blk2 = dx_db->node_min_hash;
				code = PR_2_HTREE_MIN_HASH;
				fix_problem(ctx, code, &pctx);
				bad_dir++;
			}
			if (dx_db->type == DX_DIRBLOCK_LEAF) {
				depth = htree_depth(dx_dir, dx_db);
				if (depth != dx_dir->depth) {
					pctx.num = dx_dir->depth;
					code = PR_2_HTREE_BAD_DEPTH;
					fix_problem(ctx, code, &pctx);
					bad_dir++;
				}
			}
			/*
			 * This test doesn't apply for the root block
			 * at block #0
			 */
			if (b &&
			    (dx_db->max_hash > dx_db->node_max_hash)) {
				pctx.blk = dx_db->max_hash;
				pctx.blk2 = dx_db->node_max_hash;
				code = PR_2_HTREE_MAX_HASH;
				fix_problem(ctx, code, &pctx);
				bad_dir++;
			}
			if (!(dx_db->flags & DX_FLAG_REFERENCED)) {
				code = PR_2_HTREE_NOTREF;
				fix_problem(ctx, code, &pctx);
				bad_dir++;
			} else if (dx_db->flags & DX_FLAG_DUP_REF) {
				code = PR_2_HTREE_DUPREF;
				fix_problem(ctx, code, &pctx);
				bad_dir++;
			}
		}
		if (bad_dir && fix_problem(ctx, PR_2_HTREE_CLEAR, &pctx)) {
			clear_htree(ctx, dx_dir->ino);
			dx_dir->numblocks = 0;
		}
	}
	e2fsck_free_dx_dir_info(ctx);
#endif
	ext2fs_free_mem(&buf);
	ext2fs_free_dblist(fs->dblist);

	if (ctx->inode_bad_map) {
		ext2fs_free_inode_bitmap(ctx->inode_bad_map);
		ctx->inode_bad_map = 0;
	}
	if (ctx->inode_reg_map) {
		ext2fs_free_inode_bitmap(ctx->inode_reg_map);
		ctx->inode_reg_map = 0;
	}

	clear_problem_context(&pctx);
	if (ctx->large_files) {
		if (!(sb->s_feature_ro_compat &
		      EXT2_FEATURE_RO_COMPAT_LARGE_FILE) &&
		    fix_problem(ctx, PR_2_FEATURE_LARGE_FILES, &pctx)) {
			sb->s_feature_ro_compat |=
				EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
			fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
			ext2fs_mark_super_dirty(fs);
		}
		if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
		    fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
			ext2fs_update_dynamic_rev(fs);
			ext2fs_mark_super_dirty(fs);
		}
	}

	print_resource_track(ctx, _("Pass 2"), &rtrack, fs->io);
}
/*
 * Remove an external journal from the filesystem
 */
static void remove_journal_device(ext2_filsys fs)
{
	char		*journal_path;
	ext2_filsys	jfs;
	char		buf[1024];
	journal_superblock_t	*jsb;
	int		i, nr_users;
	errcode_t	retval;
	int		commit_remove_journal = 0;
	io_manager	io_ptr;

	if (f_flag)
		commit_remove_journal = 1; /* force removal even if error */

	uuid_unparse(fs->super->s_journal_uuid, buf);
	journal_path = blkid_get_devname(NULL, "UUID", buf);

	if (!journal_path) {
		journal_path =
			ext2fs_find_block_device(fs->super->s_journal_dev);
		if (!journal_path)
			return;
	}

#ifdef CONFIG_TESTIO_DEBUG
	if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
		io_ptr = test_io_manager;
		test_io_backing_manager = unix_io_manager;
	} else
#endif
		io_ptr = unix_io_manager;
	retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
			     EXT2_FLAG_JOURNAL_DEV_OK, 0,
			     fs->blocksize, io_ptr, &jfs);
	if (retval) {
		com_err(program_name, retval,
			_("while trying to open external journal"));
		goto no_valid_journal;
	}
	if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
		fprintf(stderr, _("%s is not a journal device.\n"),
			journal_path);
		goto no_valid_journal;
	}

	/* Get the journal superblock */
	if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
		com_err(program_name, retval,
			_("while reading journal superblock"));
		goto no_valid_journal;
	}

	jsb = (journal_superblock_t *) buf;
	if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
	    (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
		fputs(_("Journal superblock not found!\n"), stderr);
		goto no_valid_journal;
	}

	/* Find the filesystem UUID */
	nr_users = ntohl(jsb->s_nr_users);
	for (i = 0; i < nr_users; i++) {
		if (memcmp(fs->super->s_uuid,
			   &jsb->s_users[i*16], 16) == 0)
			break;
	}
	if (i >= nr_users) {
		fputs(_("Filesystem's UUID not found on journal device.\n"),
		      stderr);
		commit_remove_journal = 1;
		goto no_valid_journal;
	}
	nr_users--;
	for (i = 0; i < nr_users; i++)
		memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
	jsb->s_nr_users = htonl(nr_users);

	/* Write back the journal superblock */
	if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
		com_err(program_name, retval,
			"while writing journal superblock.");
		goto no_valid_journal;
	}

	commit_remove_journal = 1;

no_valid_journal:
	if (commit_remove_journal == 0) {
		fputs(_("Journal NOT removed\n"), stderr);
		exit(1);
	}
	fs->super->s_journal_dev = 0;
	uuid_clear(fs->super->s_journal_uuid);
	ext2fs_mark_super_dirty(fs);
	fputs(_("Journal removed\n"), stdout);
	free(journal_path);
}
/*
 * This function creates a journal using direct I/O routines.
 */
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
				     blk_t size, int flags)
{
	char			*buf;
	dgrp_t			group, start, end, i, log_flex;
	errcode_t		retval;
	struct ext2_inode	inode;
	struct mkjournal_struct	es;

	if ((retval = ext2fs_create_journal_superblock(fs, size, flags, &buf)))
		return retval;

	if ((retval = ext2fs_read_bitmaps(fs)))
		return retval;

	if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
		return retval;

	if (inode.i_blocks > 0)
		return EEXIST;

	es.num_blocks = size;
	es.newblocks = 0;
	es.buf = buf;
	es.err = 0;
	es.zero_count = 0;

	if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
		inode.i_flags |= EXT4_EXTENTS_FL;
		if ((retval = ext2fs_write_inode(fs, journal_ino, &inode)))
			return retval;
	}

	/*
	 * Set the initial goal block to be roughly at the middle of
	 * the filesystem.  Pick a group that has the largest number
	 * of free blocks.
	 */
	group = ext2fs_group_of_blk(fs, (fs->super->s_blocks_count -
					 fs->super->s_first_data_block) / 2);
	log_flex = 1 << fs->super->s_log_groups_per_flex;
	if (fs->super->s_log_groups_per_flex && (group > log_flex)) {
		group = group & ~(log_flex - 1);
		while ((group < fs->group_desc_count) &&
		       fs->group_desc[group].bg_free_blocks_count == 0)
			group++;
		if (group == fs->group_desc_count)
			group = 0;
		start = group;
	} else
		start = (group > 0) ? group-1 : group;
	end = ((group+1) < fs->group_desc_count) ? group+1 : group;
	group = start;
	for (i=start+1; i <= end; i++)
		if (fs->group_desc[i].bg_free_blocks_count >
		    fs->group_desc[group].bg_free_blocks_count)
			group = i;

	es.goal = (fs->super->s_blocks_per_group * group) +
		fs->super->s_first_data_block;

	retval = ext2fs_block_iterate2(fs, journal_ino, BLOCK_FLAG_APPEND,
				       0, mkjournal_proc, &es);
	if (es.err) {
		retval = es.err;
		goto errout;
	}
	if (es.zero_count) {
		retval = ext2fs_zero_blocks(fs, es.blk_to_zero,
					    es.zero_count, 0, 0);
		if (retval)
			goto errout;
	}

	if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
		goto errout;

	inode.i_size += fs->blocksize * size;
	ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);
	inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
	inode.i_links_count = 1;
	inode.i_mode = LINUX_S_IFREG | 0600;

	if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode)))
		goto errout;
	retval = 0;

	memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
	fs->super->s_jnl_blocks[16] = inode.i_size;
	fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
	ext2fs_mark_super_dirty(fs);

errout:
	ext2fs_free_mem(&buf);
	return retval;
}
int main (int argc, char ** argv)
{
	errcode_t	retval;
	ext2_filsys	fs;
	int		c;
	int		flags = 0;
	int		flush = 0;
	int		force = 0;
	int		io_flags = 0;
	int		force_min_size = 0;
	int		print_min_size = 0;
	int		fd, ret;
	blk_t		new_size = 0;
	blk_t		max_size = 0;
	blk_t		min_size = 0;
	io_manager	io_ptr;
	char		*new_size_str = 0;
	int		use_stride = -1;
#ifdef HAVE_FSTAT64
	struct stat64	st_buf;
#else
	struct stat	st_buf;
#endif
	__s64		new_file_size;
	unsigned int	sys_page_size = 4096;
	long		sysval;
	int		len, mount_flags;
	char		*mtpt;

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
#endif

	add_error_table(&et_ext2_error_table);

	fprintf (stderr, "resize2fs %s (%s)\n",
		 E2FSPROGS_VERSION, E2FSPROGS_DATE);
	if (argc && *argv)
		program_name = *argv;

	while ((c = getopt (argc, argv, "d:fFhMPpS:")) != EOF) {
		switch (c) {
		case 'h':
			usage(program_name);
			break;
		case 'f':
			force = 1;
			break;
		case 'F':
			flush = 1;
			break;
		case 'M':
			force_min_size = 1;
			break;
		case 'P':
			print_min_size = 1;
			break;
		case 'd':
			flags |= atoi(optarg);
			break;
		case 'p':
			flags |= RESIZE_PERCENT_COMPLETE;
			break;
		case 'S':
			use_stride = atoi(optarg);
			break;
		default:
			usage(program_name);
		}
	}
	if (optind == argc)
		usage(program_name);

	device_name = argv[optind++];
	if (optind < argc)
		new_size_str = argv[optind++];
	if (optind < argc)
		usage(program_name);

	io_options = strchr(device_name, '?');
	if (io_options)
		*io_options++ = 0;

	/*
	 * Figure out whether or not the device is mounted, and if it is
	 * where it is mounted.
	 */
	len=80;
	while (1) {
		mtpt = malloc(len);
		if (!mtpt)
			return ENOMEM;
		mtpt[len-1] = 0;
		retval = ext2fs_check_mount_point(device_name, &mount_flags,
						  mtpt, len);
		if (retval) {
			com_err("ext2fs_check_mount_point", retval,
				_("while determining whether %s is mounted."),
				device_name);
			exit(1);
		}
		if (!(mount_flags & EXT2_MF_MOUNTED) || (mtpt[len-1] == 0))
			break;
		free(mtpt);
		len = 2 * len;
	}

#ifdef HAVE_OPEN64
	fd = open64(device_name, O_RDWR);
#else
	fd = open(device_name, O_RDWR);
#endif
	if (fd < 0) {
		com_err("open", errno, _("while opening %s"),
			device_name);
		exit(1);
	}

#ifdef HAVE_FSTAT64
	ret = fstat64(fd, &st_buf);
#else
	ret = fstat(fd, &st_buf);
#endif
	if (ret < 0) {
		com_err("open", errno,
			_("while getting stat information for %s"),
			device_name);
		exit(1);
	}

	if (flush) {
		retval = ext2fs_sync_device(fd, 1);
		if (retval) {
			com_err(argv[0], retval,
				_("while trying to flush %s"),
				device_name);
			exit(1);
		}
	}

	if (!S_ISREG(st_buf.st_mode )) {
		close(fd);
		fd = -1;
	}

#ifdef CONFIG_TESTIO_DEBUG
	if (getenv("TEST_IO_FLAGS") || getenv("TEST_IO_BLOCK")) {
		io_ptr = test_io_manager;
		test_io_backing_manager = unix_io_manager;
	} else
#endif
		io_ptr = unix_io_manager;

	if (!(mount_flags & EXT2_MF_MOUNTED))
		io_flags = EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE;
	retval = ext2fs_open2(device_name, io_options, io_flags,
			      0, 0, io_ptr, &fs);
	if (retval) {
		com_err (program_name, retval, _("while trying to open %s"),
			 device_name);
		printf (_("Couldn't find valid filesystem superblock.\n"));
		exit (1);
	}

	/*
	 * Check for compatibility with the feature sets.  We need to
	 * be more stringent than ext2fs_open().
	 */
	if (fs->super->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) {
		com_err(program_name, EXT2_ET_UNSUPP_FEATURE,
			"(%s)", device_name);
		exit(1);
	}

	/*
	 * XXXX   The combination of flex_bg and !resize_inode causes
	 * major problems for resize2fs, since when the group descriptors
	 * grow in size this can potentially require multiple inode
	 * tables to be moved aside to make room, and resize2fs chokes
	 * rather badly in this scenario.  It's a rare combination,
	 * except when a filesystem is expanded more than a certain
	 * size, so for now, we'll just prohibit that combination.
	 * This is something we should fix eventually, though.
	 */
	if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_FLEX_BG) &&
	    !(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
		com_err(program_name, 0, _("%s: The combination of flex_bg "
					   "and\n\t!resize_inode features "
					   "is not supported by resize2fs.\n"),
			device_name);
		exit(1);
	}

	min_size = calculate_minimum_resize_size(fs);

	if (print_min_size) {
		printf(_("Estimated minimum size of the filesystem: %u\n"),
		       min_size);
		exit(0);
	}

	/* Determine the system page size if possible */
#ifdef HAVE_SYSCONF
#if (!defined(_SC_PAGESIZE) && defined(_SC_PAGE_SIZE))
#define _SC_PAGESIZE _SC_PAGE_SIZE
#endif
#ifdef _SC_PAGESIZE
	sysval = sysconf(_SC_PAGESIZE);
	if (sysval > 0)
		sys_page_size = sysval;
#endif /* _SC_PAGESIZE */
#endif /* HAVE_SYSCONF */

	/*
	 * Get the size of the containing partition, and use this for
	 * defaults and for making sure the new filesystem doesn't
	 * exceed the partition size.
	 */
	retval = ext2fs_get_device_size(device_name, fs->blocksize,
					&max_size);
	if (retval) {
		com_err(program_name, retval,
			_("while trying to determine filesystem size"));
		exit(1);
	}
	if (force_min_size)
		new_size = min_size;
	else if (new_size_str) {
		new_size = parse_num_blocks(new_size_str,
					    fs->super->s_log_block_size);
		if (new_size == 0) {
			com_err(program_name, 0,
				_("Invalid new size: %s\n"), new_size_str);
			exit(1);
		}
	} else {
		new_size = max_size;
		/* Round down to an even multiple of a pagesize */
		if (sys_page_size > fs->blocksize)
			new_size &= ~((sys_page_size / fs->blocksize)-1);
	}

	if (!force && new_size < min_size) {
		com_err(program_name, 0,
			_("New size smaller than minimum (%u)\n"), min_size);
		exit(1);
	}
	if (use_stride >= 0) {
		if (use_stride >= (int) fs->super->s_blocks_per_group) {
			com_err(program_name, 0,
				_("Invalid stride length"));
			exit(1);
		}
		fs->stride = fs->super->s_raid_stride = use_stride;
		ext2fs_mark_super_dirty(fs);
	} else
		  determine_fs_stride(fs);

	/*
	 * If we are resizing a plain file, and it's not big enough,
	 * automatically extend it in a sparse fashion by writing the
	 * last requested block.
	 */
	new_file_size = ((__u64) new_size) * fs->blocksize;
	if ((__u64) new_file_size >
	    (((__u64) 1) << (sizeof(st_buf.st_size)*8 - 1)) - 1)
		fd = -1;
	if ((new_file_size > st_buf.st_size) &&
	    (fd > 0)) {
		if ((ext2fs_llseek(fd, new_file_size-1, SEEK_SET) >= 0) &&
		    (write(fd, "0", 1) == 1))
			max_size = new_size;
	}
	if (!force && (new_size > max_size)) {
		fprintf(stderr, _("The containing partition (or device)"
			" is only %u (%dk) blocks.\nYou requested a new size"
			" of %u blocks.\n\n"), max_size,
			fs->blocksize / 1024, new_size);
		exit(1);
	}
	if (new_size == fs->super->s_blocks_count) {
		fprintf(stderr, _("The filesystem is already %u blocks "
			"long.  Nothing to do!\n\n"), new_size);
		exit(0);
	}
	if (mount_flags & EXT2_MF_MOUNTED) {
		retval = online_resize_fs(fs, mtpt, &new_size, flags);
	} else {
		if (!force && ((fs->super->s_lastcheck < fs->super->s_mtime) ||
			       (fs->super->s_state & EXT2_ERROR_FS) ||
			       ((fs->super->s_state & EXT2_VALID_FS) == 0))) {
			fprintf(stderr,
				_("Please run 'e2fsck -f %s' first.\n\n"),
				device_name);
			exit(1);
		}
		printf(_("Resizing the filesystem on "
			 "%s to %u (%dk) blocks.\n"),
		       device_name, new_size, fs->blocksize / 1024);
		retval = resize_fs(fs, &new_size, flags,
				   ((flags & RESIZE_PERCENT_COMPLETE) ?
				    resize_progress_func : 0));
	}
	free(mtpt);
	if (retval) {
		com_err(program_name, retval, _("while trying to resize %s"),
			device_name);
		fprintf(stderr,
			_("Please run 'e2fsck -fy %s' to fix the filesystem\n"
			  "after the aborted resize operation.\n"),
			device_name);
		ext2fs_close(fs);
		exit(1);
	}
	printf(_("The filesystem on %s is now %u blocks long.\n\n"),
	       device_name, new_size);

	if ((st_buf.st_size > new_file_size) &&
	    (fd > 0)) {
#ifdef HAVE_FTRUNCATE64
		retval = ftruncate64(fd, new_file_size);
#else
		retval = 0;
		/* Only truncate if new_file_size doesn't overflow off_t */
		if (((off_t) new_file_size) == new_file_size)
			retval = ftruncate(fd, (off_t) new_file_size);
#endif
		if (retval)
			com_err(program_name, retval,
				_("while trying to truncate %s"),
				device_name);
	}
	if (fd > 0)
		close(fd);
	remove_error_table(&et_ext2_error_table);
	return (0);
}
errcode_t ext2fs_initialize(const char *name, int flags,
			    struct ext2_super_block *param,
			    io_manager manager, ext2_filsys *ret_fs)
{
	ext2_filsys	fs;
	errcode_t	retval;
	struct ext2_super_block *super;
	unsigned int	rem;
	unsigned int	overhead = 0;
	unsigned int	ipg;
	dgrp_t		i;
	blk64_t		free_blocks;
	blk_t		numblocks;
	int		rsv_gdt;
	int		csum_flag;
	int		bigalloc_flag;
	int		io_flags;
	unsigned	reserved_inos;
	char		*buf = 0;
	char		c;
	double		reserved_ratio;

	if (!param || !ext2fs_blocks_count(param))
		return EXT2_ET_INVALID_ARGUMENT;

	retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
	if (retval)
		return retval;

	memset(fs, 0, sizeof(struct struct_ext2_filsys));
	fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
	fs->flags = flags | EXT2_FLAG_RW;
	fs->umask = 022;
	fs->default_bitmap_type = EXT2FS_BMAP64_RBTREE;
#ifdef WORDS_BIGENDIAN
	fs->flags |= EXT2_FLAG_SWAP_BYTES;
#endif
	io_flags = IO_FLAG_RW;
	if (flags & EXT2_FLAG_EXCLUSIVE)
		io_flags |= IO_FLAG_EXCLUSIVE;
	if (flags & EXT2_FLAG_DIRECT_IO)
		io_flags |= IO_FLAG_DIRECT_IO;
	retval = manager->open(name, io_flags, &fs->io);
	if (retval)
		goto cleanup;
	fs->image_io = fs->io;
	fs->io->app_data = fs;
	retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
	if (retval)
		goto cleanup;

	strcpy(fs->device_name, name);
	retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super);
	if (retval)
		goto cleanup;
	fs->super = super;

	memset(super, 0, SUPERBLOCK_SIZE);

#define set_field(field, default) (super->field = param->field ? \
				   param->field : (default))
#define assign_field(field)	(super->field = param->field)

	super->s_magic = EXT2_SUPER_MAGIC;
	super->s_state = EXT2_VALID_FS;

	bigalloc_flag = EXT2_HAS_RO_COMPAT_FEATURE(param,
				   EXT4_FEATURE_RO_COMPAT_BIGALLOC);

	assign_field(s_log_block_size);

	if (bigalloc_flag) {
		set_field(s_log_cluster_size, super->s_log_block_size+4);
		if (super->s_log_block_size > super->s_log_cluster_size) {
			retval = EXT2_ET_INVALID_ARGUMENT;
			goto cleanup;
		}
	} else
		super->s_log_cluster_size = super->s_log_block_size;

	set_field(s_first_data_block, super->s_log_cluster_size ? 0 : 1);
	set_field(s_max_mnt_count, 0);
	set_field(s_errors, EXT2_ERRORS_DEFAULT);
	set_field(s_feature_compat, 0);
	set_field(s_feature_incompat, 0);
	set_field(s_feature_ro_compat, 0);
	set_field(s_default_mount_opts, 0);
	set_field(s_first_meta_bg, 0);
	set_field(s_raid_stride, 0);		/* default stride size: 0 */
	set_field(s_raid_stripe_width, 0);	/* default stripe width: 0 */
	set_field(s_log_groups_per_flex, 0);
	set_field(s_flags, 0);
	assign_field(s_backup_bgs[0]);
	assign_field(s_backup_bgs[1]);
	if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) {
		retval = EXT2_ET_UNSUPP_FEATURE;
		goto cleanup;
	}
	if (super->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
		retval = EXT2_ET_RO_UNSUPP_FEATURE;
		goto cleanup;
	}

	set_field(s_rev_level, EXT2_GOOD_OLD_REV);
	if (super->s_rev_level >= EXT2_DYNAMIC_REV) {
		set_field(s_first_ino, EXT2_GOOD_OLD_FIRST_INO);
		set_field(s_inode_size, EXT2_GOOD_OLD_INODE_SIZE);
		if (super->s_inode_size >= sizeof(struct ext2_inode_large)) {
			int extra_isize = sizeof(struct ext2_inode_large) -
				EXT2_GOOD_OLD_INODE_SIZE;
			set_field(s_min_extra_isize, extra_isize);
			set_field(s_want_extra_isize, extra_isize);
		}
	} else {
		super->s_first_ino = EXT2_GOOD_OLD_FIRST_INO;
		super->s_inode_size = EXT2_GOOD_OLD_INODE_SIZE;
	}

	set_field(s_checkinterval, 0);
	super->s_mkfs_time = super->s_lastcheck = fs->now ? fs->now : time(NULL);

	super->s_creator_os = CREATOR_OS;

	fs->fragsize = fs->blocksize = EXT2_BLOCK_SIZE(super);
	fs->cluster_ratio_bits = super->s_log_cluster_size -
		super->s_log_block_size;

	if (bigalloc_flag) {
		unsigned long long bpg;

		if (param->s_blocks_per_group &&
		    param->s_clusters_per_group &&
		    ((param->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs)) !=
		     param->s_blocks_per_group)) {
			retval = EXT2_ET_INVALID_ARGUMENT;
			goto cleanup;
		}
		if (param->s_clusters_per_group)
			assign_field(s_clusters_per_group);
		else if (param->s_blocks_per_group)
			super->s_clusters_per_group = 
				param->s_blocks_per_group /
				EXT2FS_CLUSTER_RATIO(fs);
		else if (super->s_log_cluster_size + 15 < 32)
			super->s_clusters_per_group = fs->blocksize * 8;
		else
			super->s_clusters_per_group = (fs->blocksize - 1) * 8;
		if (super->s_clusters_per_group > EXT2_MAX_CLUSTERS_PER_GROUP(super))
			super->s_clusters_per_group = EXT2_MAX_CLUSTERS_PER_GROUP(super);
		bpg = EXT2FS_C2B(fs,
			(unsigned long long) super->s_clusters_per_group);
		if (bpg >= (((unsigned long long) 1) << 32)) {
			retval = EXT2_ET_INVALID_ARGUMENT;
			goto cleanup;
		}
		super->s_blocks_per_group = bpg;
	} else {
		set_field(s_blocks_per_group, fs->blocksize * 8);
		if (super->s_blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(super))
			super->s_blocks_per_group = EXT2_MAX_BLOCKS_PER_GROUP(super);
		super->s_clusters_per_group = super->s_blocks_per_group;
	}

	ext2fs_blocks_count_set(super, ext2fs_blocks_count(param) &
				~((blk64_t) EXT2FS_CLUSTER_MASK(fs)));
	ext2fs_r_blocks_count_set(super, ext2fs_r_blocks_count(param));
	if (ext2fs_r_blocks_count(super) >= ext2fs_blocks_count(param)) {
		retval = EXT2_ET_INVALID_ARGUMENT;
		goto cleanup;
	}

	set_field(s_mmp_update_interval, 0);

	/*
	 * If we're creating an external journal device, we don't need
	 * to bother with the rest.
	 */
	if (super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
		fs->group_desc_count = 0;
		ext2fs_mark_super_dirty(fs);
		*ret_fs = fs;
		return 0;
	}

retry:
	fs->group_desc_count = (dgrp_t) ext2fs_div64_ceil(
		ext2fs_blocks_count(super) - super->s_first_data_block,
		EXT2_BLOCKS_PER_GROUP(super));
	if (fs->group_desc_count == 0) {
		retval = EXT2_ET_TOOSMALL;
		goto cleanup;
	}

	set_field(s_desc_size,
		  super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT ?
		  EXT2_MIN_DESC_SIZE_64BIT : 0);

	fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
					  EXT2_DESC_PER_BLOCK(super));

	i = fs->blocksize >= 4096 ? 1 : 4096 / fs->blocksize;

	if (super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_64BIT &&
	    (ext2fs_blocks_count(super) / i) > (1ULL << 32))
		set_field(s_inodes_count, ~0U);
	else
		set_field(s_inodes_count, ext2fs_blocks_count(super) / i);

	/*
	 * Make sure we have at least EXT2_FIRST_INO + 1 inodes, so
	 * that we have enough inodes for the filesystem(!)
	 */
	if (super->s_inodes_count < EXT2_FIRST_INODE(super)+1)
		super->s_inodes_count = EXT2_FIRST_INODE(super)+1;

	/*
	 * There should be at least as many inodes as the user
	 * requested.  Figure out how many inodes per group that
	 * should be.  But make sure that we don't allocate more than
	 * one bitmap's worth of inodes each group.
	 */
	ipg = ext2fs_div_ceil(super->s_inodes_count, fs->group_desc_count);
	if (ipg > fs->blocksize * 8) {
		if (!bigalloc_flag && super->s_blocks_per_group >= 256) {
			/* Try again with slightly different parameters */
			super->s_blocks_per_group -= 8;
			ext2fs_blocks_count_set(super,
						ext2fs_blocks_count(param));
			super->s_clusters_per_group = super->s_blocks_per_group;
			goto retry;
		} else {
			retval = EXT2_ET_TOO_MANY_INODES;
			goto cleanup;
		}
	}

	if (ipg > (unsigned) EXT2_MAX_INODES_PER_GROUP(super))
		ipg = EXT2_MAX_INODES_PER_GROUP(super);

ipg_retry:
	super->s_inodes_per_group = ipg;

	/*
	 * Make sure the number of inodes per group completely fills
	 * the inode table blocks in the descriptor.  If not, add some
	 * additional inodes/group.  Waste not, want not...
	 */
	fs->inode_blocks_per_group = (((super->s_inodes_per_group *
					EXT2_INODE_SIZE(super)) +
				       EXT2_BLOCK_SIZE(super) - 1) /
				      EXT2_BLOCK_SIZE(super));
	super->s_inodes_per_group = ((fs->inode_blocks_per_group *
				      EXT2_BLOCK_SIZE(super)) /
				     EXT2_INODE_SIZE(super));
	/*
	 * Finally, make sure the number of inodes per group is a
	 * multiple of 8.  This is needed to simplify the bitmap
	 * splicing code.
	 */
	if (super->s_inodes_per_group < 8)
		super->s_inodes_per_group = 8;
	super->s_inodes_per_group &= ~7;
	fs->inode_blocks_per_group = (((super->s_inodes_per_group *
					EXT2_INODE_SIZE(super)) +
				       EXT2_BLOCK_SIZE(super) - 1) /
				      EXT2_BLOCK_SIZE(super));

	/*
	 * adjust inode count to reflect the adjusted inodes_per_group
	 */
	if ((__u64)super->s_inodes_per_group * fs->group_desc_count > ~0U) {
		ipg--;
		goto ipg_retry;
	}
	super->s_inodes_count = super->s_inodes_per_group *
		fs->group_desc_count;
	super->s_free_inodes_count = super->s_inodes_count;

	/*
	 * check the number of reserved group descriptor table blocks
	 */
	if (super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE)
		rsv_gdt = calc_reserved_gdt_blocks(fs);
	else
		rsv_gdt = 0;
	set_field(s_reserved_gdt_blocks, rsv_gdt);
	if (super->s_reserved_gdt_blocks > EXT2_ADDR_PER_BLOCK(super)) {
		retval = EXT2_ET_RES_GDT_BLOCKS;
		goto cleanup;
	}

	/*
	 * Calculate the maximum number of bookkeeping blocks per
	 * group.  It includes the superblock, the block group
	 * descriptors, the block bitmap, the inode bitmap, the inode
	 * table, and the reserved gdt blocks.
	 */
	overhead = (int) (3 + fs->inode_blocks_per_group +
			  fs->desc_blocks + super->s_reserved_gdt_blocks);

	/* This can only happen if the user requested too many inodes */
	if (overhead > super->s_blocks_per_group) {
		retval = EXT2_ET_TOO_MANY_INODES;
		goto cleanup;
	}

	/*
	 * See if the last group is big enough to support the
	 * necessary data structures.  If not, we need to get rid of
	 * it.  We need to recalculate the overhead for the last block
	 * group, since it might or might not have a superblock
	 * backup.
	 */
	overhead = (int) (2 + fs->inode_blocks_per_group);
	if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1))
		overhead += 1 + fs->desc_blocks + super->s_reserved_gdt_blocks;
	rem = ((ext2fs_blocks_count(super) - super->s_first_data_block) %
	       super->s_blocks_per_group);
	if ((fs->group_desc_count == 1) && rem && (rem < overhead)) {
		retval = EXT2_ET_TOOSMALL;
		goto cleanup;
	}
	if (rem && (rem < overhead+50)) {
		ext2fs_blocks_count_set(super, ext2fs_blocks_count(super) -
					rem);
		/*
		 * If blocks count is changed, we need to recalculate
		 * reserved blocks count not to exceed 50%.
		 */
		reserved_ratio = 100.0 * ext2fs_r_blocks_count(param) /
			ext2fs_blocks_count(param);
		ext2fs_r_blocks_count_set(super, reserved_ratio *
			ext2fs_blocks_count(super) / 100.0);

		goto retry;
	}

	/*
	 * At this point we know how big the filesystem will be.  So
	 * we can do any and all allocations that depend on the block
	 * count.
	 */

	/* Set up the locations of the backup superblocks */
	if (super->s_feature_compat & EXT4_FEATURE_COMPAT_SPARSE_SUPER2) {
		if (super->s_backup_bgs[0] >= fs->group_desc_count)
			super->s_backup_bgs[0] = fs->group_desc_count - 1;
		if (super->s_backup_bgs[1] >= fs->group_desc_count)
			super->s_backup_bgs[1] = fs->group_desc_count - 1;
		if (super->s_backup_bgs[0] == super->s_backup_bgs[1])
			super->s_backup_bgs[1] = 0;
		if (super->s_backup_bgs[0] > super->s_backup_bgs[1]) {
			__u32 t = super->s_backup_bgs[0];
			super->s_backup_bgs[0] = super->s_backup_bgs[1];
			super->s_backup_bgs[1] = t;
		}
	}

	retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf);
	if (retval)
		goto cleanup;

	strcpy(buf, "block bitmap for ");
	strcat(buf, fs->device_name);
	retval = ext2fs_allocate_subcluster_bitmap(fs, buf, &fs->block_map);
	if (retval)
		goto cleanup;

	strcpy(buf, "inode bitmap for ");
	strcat(buf, fs->device_name);
	retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map);
	if (retval)
		goto cleanup;

	ext2fs_free_mem(&buf);

	retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
				&fs->group_desc);
	if (retval)
		goto cleanup;

	memset(fs->group_desc, 0, (size_t) fs->desc_blocks * fs->blocksize);

	/*
	 * Reserve the superblock and group descriptors for each
	 * group, and fill in the correct group statistics for group.
	 * Note that although the block bitmap, inode bitmap, and
	 * inode table have not been allocated (and in fact won't be
	 * by this routine), they are accounted for nevertheless.
	 *
	 * If FLEX_BG meta-data grouping is used, only account for the
	 * superblock and group descriptors (the inode tables and
	 * bitmaps will be accounted for when allocated).
	 */
	free_blocks = 0;
	csum_flag = ext2fs_has_group_desc_csum(fs);
	reserved_inos = super->s_first_ino;
	for (i = 0; i < fs->group_desc_count; i++) {
		/*
		 * Don't set the BLOCK_UNINIT group for the last group
		 * because the block bitmap needs to be padded.
		 */
		if (csum_flag) {
			if (i != fs->group_desc_count - 1)
				ext2fs_bg_flags_set(fs, i,
						    EXT2_BG_BLOCK_UNINIT);
			ext2fs_bg_flags_set(fs, i, EXT2_BG_INODE_UNINIT);
			numblocks = super->s_inodes_per_group;
			if (reserved_inos) {
				if (numblocks > reserved_inos) {
					numblocks -= reserved_inos;
					reserved_inos = 0;
				} else {
					reserved_inos -= numblocks;
					numblocks = 0;
				}
			}
			ext2fs_bg_itable_unused_set(fs, i, numblocks);
		}
		numblocks = ext2fs_reserve_super_and_bgd(fs, i, fs->block_map);
		if (fs->super->s_log_groups_per_flex)
			numblocks += 2 + fs->inode_blocks_per_group;

		free_blocks += numblocks;
		ext2fs_bg_free_blocks_count_set(fs, i, numblocks);
		ext2fs_bg_free_inodes_count_set(fs, i, fs->super->s_inodes_per_group);
		ext2fs_bg_used_dirs_count_set(fs, i, 0);
		ext2fs_group_desc_csum_set(fs, i);
	}
	free_blocks &= ~EXT2FS_CLUSTER_MASK(fs);
	ext2fs_free_blocks_count_set(super, free_blocks);

	c = (char) 255;
	if (((int) c) == -1) {
		super->s_flags |= EXT2_FLAGS_SIGNED_HASH;
	} else {
		super->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
	}

	ext2fs_mark_super_dirty(fs);
	ext2fs_mark_bb_dirty(fs);
	ext2fs_mark_ib_dirty(fs);

	io_channel_set_blksize(fs->io, fs->blocksize);

	*ret_fs = fs;
	return 0;
cleanup:
	free(buf);
	ext2fs_free(fs);
	return retval;
}
Exemple #9
0
errcode_t quota_write_inode(quota_ctx_t qctx, int qtype)
{
	int		retval = 0, i;
	dict_t		*dict;
	ext2_filsys	fs;
	struct quota_handle *h = NULL;
	int		fmt = QFMT_VFS_V1;

	if (!qctx)
		return 0;

	fs = qctx->fs;
	retval = ext2fs_get_mem(sizeof(struct quota_handle), &h);
	if (retval) {
		log_err("Unable to allocate quota handle: %s",
			error_message(retval));
		goto out;
	}

	retval = ext2fs_read_bitmaps(fs);
	if (retval) {
		log_err("Couldn't read bitmaps: %s", error_message(retval));
		goto out;
	}

	for (i = 0; i < MAXQUOTAS; i++) {
		if ((qtype != -1) && (i != qtype))
			continue;

		dict = qctx->quota_dict[i];
		if (!dict)
			continue;

		retval = quota_file_create(h, fs, i, fmt);
		if (retval < 0) {
			log_err("Cannot initialize io on quotafile");
			continue;
		}

		write_dquots(dict, h);
		retval = quota_file_close(qctx, h);
		if (retval < 0) {
			log_err("Cannot finish IO on new quotafile: %s",
				strerror(errno));
			if (h->qh_qf.e2_file)
				ext2fs_file_close(h->qh_qf.e2_file);
			quota_inode_truncate(fs, h->qh_qf.ino);
			continue;
		}

		/* Set quota inode numbers in superblock. */
		quota_set_sb_inum(fs, h->qh_qf.ino, i);
		ext2fs_mark_super_dirty(fs);
		ext2fs_mark_bb_dirty(fs);
		fs->flags &= ~EXT2_FLAG_SUPER_ONLY;
	}

	retval = ext2fs_write_bitmaps(fs);
	if (retval) {
		log_err("Couldn't write bitmaps: %s", error_message(retval));
		goto out;
	}
out:
	if (h)
		ext2fs_free_mem(&h);
	return retval;
}
Exemple #10
0
static void check_inode_bitmaps(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	ext2_ino_t	i;
	unsigned int	free_inodes = 0;
	int		group_free = 0;
	int		dirs_count = 0;
	int		group = 0;
	unsigned int	inodes = 0;
	int		*free_array;
	int		*dir_array;
	int		actual, bitmap;
	errcode_t	retval;
	struct problem_context	pctx;
	int		problem, save_problem, fixit, had_problem;
	int		lazy_bg = 0;
	int		skip_group = 0;

	clear_problem_context(&pctx);
	free_array = (int *) e2fsck_allocate_memory(ctx,
	    fs->group_desc_count * sizeof(int), "free inode count array");

	dir_array = (int *) e2fsck_allocate_memory(ctx,
	   fs->group_desc_count * sizeof(int), "directory count array");

	if ((1 < ext2fs_get_inode_bitmap_start(ctx->inode_used_map)) ||
	    (fs->super->s_inodes_count >
	     ext2fs_get_inode_bitmap_end(ctx->inode_used_map))) {
		pctx.num = 3;
		pctx.blk = 1;
		pctx.blk2 = fs->super->s_inodes_count;
		pctx.ino = ext2fs_get_inode_bitmap_start(ctx->inode_used_map);
		pctx.ino2 = ext2fs_get_inode_bitmap_end(ctx->inode_used_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}
	if ((1 < ext2fs_get_inode_bitmap_start(fs->inode_map)) ||
	    (fs->super->s_inodes_count >
	     ext2fs_get_inode_bitmap_end(fs->inode_map))) {
		pctx.num = 4;
		pctx.blk = 1;
		pctx.blk2 = fs->super->s_inodes_count;
		pctx.ino = ext2fs_get_inode_bitmap_start(fs->inode_map);
		pctx.ino2 = ext2fs_get_inode_bitmap_end(fs->inode_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}

	if (EXT2_HAS_COMPAT_FEATURE(fs->super,
				    EXT2_FEATURE_COMPAT_LAZY_BG))
		lazy_bg++;

redo_counts:
	had_problem = 0;
	save_problem = 0;
	pctx.ino = pctx.ino2 = 0;
	if (lazy_bg && (fs->group_desc[group].bg_flags &
			EXT2_BG_INODE_UNINIT))
		skip_group++;

	/* Protect loop from wrap-around if inodes_count is maxed */
	for (i = 1; i <= fs->super->s_inodes_count && i > 0; i++) {
		actual = ext2fs_fast_test_inode_bitmap(ctx->inode_used_map, i);
		if (skip_group)
			bitmap = 0;
		else
			bitmap = ext2fs_fast_test_inode_bitmap(fs->inode_map, i);
		if (actual == bitmap)
			goto do_counts;

		if (!actual && bitmap) {
			/*
			 * Inode wasn't used, but marked in bitmap
			 */
			problem = PR_5_INODE_UNUSED;
		} else /* if (actual && !bitmap) */ {
			/*
			 * Inode used, but not in bitmap
			 */
			problem = PR_5_INODE_USED;
		}
		if (pctx.ino == 0) {
			pctx.ino = pctx.ino2 = i;
			save_problem = problem;
		} else {
			if ((problem == save_problem) &&
			    (pctx.ino2 == i-1))
				pctx.ino2++;
			else {
				print_bitmap_problem(ctx, save_problem, &pctx);
				pctx.ino = pctx.ino2 = i;
				save_problem = problem;
			}
		}
		ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
		had_problem++;

do_counts:
		if (bitmap) {
			if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, i))
				dirs_count++;
		} else if (!skip_group) {
			group_free++;
			free_inodes++;
		}
		inodes++;
		if ((inodes == fs->super->s_inodes_per_group) ||
		    (i == fs->super->s_inodes_count)) {
			free_array[group] = group_free;
			dir_array[group] = dirs_count;
			group ++;
			inodes = 0;
			skip_group = 0;
			group_free = 0;
			dirs_count = 0;
			if (ctx->progress)
				if ((ctx->progress)(ctx, 5,
					    group + fs->group_desc_count,
					    fs->group_desc_count*2))
					goto errout;
			if (lazy_bg &&
			    (i != fs->super->s_inodes_count) &&
			    (fs->group_desc[group].bg_flags &
			     EXT2_BG_INODE_UNINIT))
				skip_group++;
		}
	}
	if (pctx.ino)
		print_bitmap_problem(ctx, save_problem, &pctx);

	if (had_problem)
		fixit = end_problem_latch(ctx, PR_LATCH_IBITMAP);
	else
		fixit = -1;
	ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;

	if (fixit == 1) {
		ext2fs_free_inode_bitmap(fs->inode_map);
		retval = ext2fs_copy_bitmap(ctx->inode_used_map,
						  &fs->inode_map);
		if (retval) {
			clear_problem_context(&pctx);
			fix_problem(ctx, PR_5_COPY_IBITMAP_ERROR, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			goto errout;
		}
		ext2fs_set_bitmap_padding(fs->inode_map);
		ext2fs_mark_ib_dirty(fs);

		/* redo counts */
		inodes = 0; free_inodes = 0; group_free = 0;
		dirs_count = 0; group = 0;
		memset(free_array, 0, fs->group_desc_count * sizeof(int));
		memset(dir_array, 0, fs->group_desc_count * sizeof(int));
		goto redo_counts;
	} else if (fixit == 0)
		ext2fs_unmark_valid(fs);

	for (i = 0; i < fs->group_desc_count; i++) {
		if (free_array[i] != fs->group_desc[i].bg_free_inodes_count) {
			pctx.group = i;
			pctx.ino = fs->group_desc[i].bg_free_inodes_count;
			pctx.ino2 = free_array[i];
			if (fix_problem(ctx, PR_5_FREE_INODE_COUNT_GROUP,
					&pctx)) {
				fs->group_desc[i].bg_free_inodes_count =
					free_array[i];
				ext2fs_mark_super_dirty(fs);
			} else
				ext2fs_unmark_valid(fs);
		}
		if (dir_array[i] != fs->group_desc[i].bg_used_dirs_count) {
			pctx.group = i;
			pctx.ino = fs->group_desc[i].bg_used_dirs_count;
			pctx.ino2 = dir_array[i];

			if (fix_problem(ctx, PR_5_FREE_DIR_COUNT_GROUP,
					&pctx)) {
				fs->group_desc[i].bg_used_dirs_count =
					dir_array[i];
				ext2fs_mark_super_dirty(fs);
			} else
				ext2fs_unmark_valid(fs);
		}
	}
	if (free_inodes != fs->super->s_free_inodes_count) {
		pctx.group = -1;
		pctx.ino = fs->super->s_free_inodes_count;
		pctx.ino2 = free_inodes;

		if (fix_problem(ctx, PR_5_FREE_INODE_COUNT, &pctx)) {
			fs->super->s_free_inodes_count = free_inodes;
			ext2fs_mark_super_dirty(fs);
		} else
			ext2fs_unmark_valid(fs);
	}
errout:
	ext2fs_free_mem(&free_array);
	ext2fs_free_mem(&dir_array);
}
Exemple #11
0
static void check_block_bitmaps(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	blk_t	i, super;
	int	*free_array;
	int	group = 0;
	unsigned int	blocks = 0;
	unsigned int	free_blocks = 0;
	int	group_free = 0;
	int	actual, bitmap;
	struct problem_context	pctx;
	int	problem, save_problem, fixit, had_problem;
	errcode_t	retval;
	int		lazy_bg = 0;
	int		skip_group = 0;

	clear_problem_context(&pctx);
	free_array = (int *) e2fsck_allocate_memory(ctx,
	    fs->group_desc_count * sizeof(int), "free block count array");

	if ((fs->super->s_first_data_block <
	     ext2fs_get_block_bitmap_start(ctx->block_found_map)) ||
	    (fs->super->s_blocks_count-1 >
	     ext2fs_get_block_bitmap_end(ctx->block_found_map))) {
		pctx.num = 1;
		pctx.blk = fs->super->s_first_data_block;
		pctx.blk2 = fs->super->s_blocks_count -1;
		pctx.ino = ext2fs_get_block_bitmap_start(ctx->block_found_map);
		pctx.ino2 = ext2fs_get_block_bitmap_end(ctx->block_found_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}

	if ((fs->super->s_first_data_block <
	     ext2fs_get_block_bitmap_start(fs->block_map)) ||
	    (fs->super->s_blocks_count-1 >
	     ext2fs_get_block_bitmap_end(fs->block_map))) {
		pctx.num = 2;
		pctx.blk = fs->super->s_first_data_block;
		pctx.blk2 = fs->super->s_blocks_count -1;
		pctx.ino = ext2fs_get_block_bitmap_start(fs->block_map);
		pctx.ino2 = ext2fs_get_block_bitmap_end(fs->block_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}

	if (EXT2_HAS_COMPAT_FEATURE(fs->super, EXT2_FEATURE_COMPAT_LAZY_BG))
		lazy_bg++;

redo_counts:
	had_problem = 0;
	save_problem = 0;
	pctx.blk = pctx.blk2 = NO_BLK;
	if (lazy_bg && (fs->group_desc[group].bg_flags &
			EXT2_BG_BLOCK_UNINIT))
		skip_group++;
	super = fs->super->s_first_data_block;
	for (i = fs->super->s_first_data_block;
	     i < fs->super->s_blocks_count;
	     i++) {
		actual = ext2fs_fast_test_block_bitmap(ctx->block_found_map, i);

		if (skip_group) {
			if ((i >= super) &&
			    (i <= super + fs->desc_blocks) &&
			    ext2fs_bg_has_super(fs, group))
				bitmap = 1;
			else if (i == fs->group_desc[group].bg_block_bitmap)
				bitmap = 1;
			else if (i == fs->group_desc[group].bg_inode_bitmap)
				bitmap = 1;
			else if (i >= fs->group_desc[group].bg_inode_table &&
				 (i < fs->group_desc[group].bg_inode_table
				  + fs->inode_blocks_per_group))
				bitmap = 1;
			else
				bitmap = 0;
			actual = (actual != 0);
		} else
			bitmap = ext2fs_fast_test_block_bitmap(fs->block_map, i);

		if (actual == bitmap)
			goto do_counts;

		if (!actual && bitmap) {
			/*
			 * Block not used, but marked in use in the bitmap.
			 */
			problem = PR_5_BLOCK_UNUSED;
		} else {
			/*
			 * Block used, but not marked in use in the bitmap.
			 */
			problem = PR_5_BLOCK_USED;
		}
		if (pctx.blk == NO_BLK) {
			pctx.blk = pctx.blk2 = i;
			save_problem = problem;
		} else {
			if ((problem == save_problem) &&
			    (pctx.blk2 == i-1))
				pctx.blk2++;
			else {
				print_bitmap_problem(ctx, save_problem, &pctx);
				pctx.blk = pctx.blk2 = i;
				save_problem = problem;
			}
		}
		ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
		had_problem++;

	do_counts:
		if (!bitmap && !skip_group) {
			group_free++;
			free_blocks++;
		}
		blocks ++;
		if ((blocks == fs->super->s_blocks_per_group) ||
		    (i == fs->super->s_blocks_count-1)) {
			free_array[group] = group_free;
			group ++;
			blocks = 0;
			group_free = 0;
			skip_group = 0;
			super += fs->super->s_blocks_per_group;
			if (ctx->progress)
				if ((ctx->progress)(ctx, 5, group,
						    fs->group_desc_count*2))
					goto errout;
			if (lazy_bg &&
			    (i != fs->super->s_blocks_count-1) &&
			    (fs->group_desc[group].bg_flags &
			     EXT2_BG_BLOCK_UNINIT))
				skip_group++;
		}
	}
	if (pctx.blk != NO_BLK)
		print_bitmap_problem(ctx, save_problem, &pctx);
	if (had_problem)
		fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP);
	else
		fixit = -1;
	ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;

	if (fixit == 1) {
		ext2fs_free_block_bitmap(fs->block_map);
		retval = ext2fs_copy_bitmap(ctx->block_found_map,
						  &fs->block_map);
		if (retval) {
			clear_problem_context(&pctx);
			fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			goto errout;
		}
		ext2fs_set_bitmap_padding(fs->block_map);
		ext2fs_mark_bb_dirty(fs);

		/* Redo the counts */
		blocks = 0; free_blocks = 0; group_free = 0; group = 0;
		memset(free_array, 0, fs->group_desc_count * sizeof(int));
		goto redo_counts;
	} else if (fixit == 0)
		ext2fs_unmark_valid(fs);

	for (i = 0; i < fs->group_desc_count; i++) {
		if (free_array[i] != fs->group_desc[i].bg_free_blocks_count) {
			pctx.group = i;
			pctx.blk = fs->group_desc[i].bg_free_blocks_count;
			pctx.blk2 = free_array[i];

			if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP,
					&pctx)) {
				fs->group_desc[i].bg_free_blocks_count =
					free_array[i];
				ext2fs_mark_super_dirty(fs);
			} else
				ext2fs_unmark_valid(fs);
		}
	}
	if (free_blocks != fs->super->s_free_blocks_count) {
		pctx.group = 0;
		pctx.blk = fs->super->s_free_blocks_count;
		pctx.blk2 = free_blocks;

		if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) {
			fs->super->s_free_blocks_count = free_blocks;
			ext2fs_mark_super_dirty(fs);
		} else
			ext2fs_unmark_valid(fs);
	}
errout:
	ext2fs_free_mem(&free_array);
}
static errcode_t journal_commit_trans(journal_transaction_t *trans)
{
	struct buffer_head *bh, *cbh = NULL;
	struct commit_header *commit;
#ifdef HAVE_SYS_TIME_H
	struct timeval tv;
#endif
	errcode_t err;

	JOURNAL_CHECK_TRANS_MAGIC(trans);

	if ((trans->flags & J_TRANS_COMMITTED) ||
	    !(trans->flags & J_TRANS_OPEN))
		return EXT2_ET_INVALID_ARGUMENT;

	bh = getblk(trans->journal->j_dev, 0, trans->journal->j_blocksize);
	if (bh == NULL)
		return ENOMEM;

	/* write the descriptor block header */
	commit = (struct commit_header *)bh->b_data;
	commit->h_magic = ext2fs_cpu_to_be32(JFS_MAGIC_NUMBER);
	commit->h_blocktype = ext2fs_cpu_to_be32(JFS_COMMIT_BLOCK);
	commit->h_sequence = ext2fs_cpu_to_be32(trans->tid);
	if (JFS_HAS_COMPAT_FEATURE(trans->journal,
				   JFS_FEATURE_COMPAT_CHECKSUM)) {
		__u32 csum_v1 = ~0;
		blk64_t cblk;

		cbh = getblk(trans->journal->j_dev, 0,
			     trans->journal->j_blocksize);
		if (cbh == NULL) {
			err = ENOMEM;
			goto error;
		}

		for (cblk = trans->start; cblk < trans->block; cblk++) {
			err = journal_bmap(trans->journal, cblk,
					   &cbh->b_blocknr);
			if (err)
				goto error;
			mark_buffer_uptodate(cbh, 0);
			ll_rw_block(READ, 1, &cbh);
			err = cbh->b_err;
			if (err)
				goto error;
			csum_v1 = ext2fs_crc32_be(csum_v1,
					(unsigned char const *)cbh->b_data,
					cbh->b_size);
		}

		commit->h_chksum_type = JFS_CRC32_CHKSUM;
		commit->h_chksum_size = JFS_CRC32_CHKSUM_SIZE;
		commit->h_chksum[0] = ext2fs_cpu_to_be32(csum_v1);
	} else {
		commit->h_chksum_type = 0;
		commit->h_chksum_size = 0;
		commit->h_chksum[0] = 0;
	}
#ifdef HAVE_SYS_TIME_H
	gettimeofday(&tv, NULL);
	commit->h_commit_sec = ext2fs_cpu_to_be32(tv.tv_sec);
	commit->h_commit_nsec = ext2fs_cpu_to_be32(tv.tv_usec * 1000);
#else
	commit->h_commit_sec = 0;
	commit->h_commit_nsec = 0;
#endif

	/* Write block */
	jbd2_commit_block_csum_set(trans->journal, bh);
	err = journal_bmap(trans->journal, trans->block, &bh->b_blocknr);
	if (err)
		goto error;

	dbg_printf("Writing commit block at %llu:%llu\n", trans->block,
		   bh->b_blocknr);
	mark_buffer_dirty(bh);
	ll_rw_block(WRITE, 1, &bh);
	err = bh->b_err;
	if (err)
		goto error;
	trans->flags |= J_TRANS_COMMITTED;
	trans->flags &= ~J_TRANS_OPEN;
	trans->block++;

	trans->fs->super->s_feature_incompat |= EXT3_FEATURE_INCOMPAT_RECOVER;
	ext2fs_mark_super_dirty(trans->fs);
error:
	if (cbh)
		brelse(cbh);
	brelse(bh);
	return err;
}
Exemple #13
0
static void check_block_bitmaps(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	blk64_t	i;
	int	*free_array;
	int	group = 0;
	blk_t	blocks = 0;
	blk_t	free_blocks = 0;
	int	group_free = 0;
	int	actual, bitmap;
	struct problem_context	pctx;
	int	problem, save_problem, fixit, had_problem;
	errcode_t	retval;
	int		csum_flag;
	int		skip_group = 0;
	int	old_desc_blocks = 0;
	int	count = 0;
	int	cmp_block = 0;
	int	redo_flag = 0;
	blk64_t	super_blk, old_desc_blk, new_desc_blk;

	clear_problem_context(&pctx);
	free_array = (int *) e2fsck_allocate_memory(ctx,
	    fs->group_desc_count * sizeof(int), "free block count array");

	if ((fs->super->s_first_data_block <
	     ext2fs_get_block_bitmap_start2(ctx->block_found_map)) ||
	    (fs->super->s_blocks_count-1 >
	     ext2fs_get_block_bitmap_end2(ctx->block_found_map))) {
		pctx.num = 1;
		pctx.blk = fs->super->s_first_data_block;
		pctx.blk2 = fs->super->s_blocks_count -1;
		pctx.ino = ext2fs_get_block_bitmap_start2(ctx->block_found_map);
		pctx.ino2 = ext2fs_get_block_bitmap_end2(ctx->block_found_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}

	if ((fs->super->s_first_data_block <
	     ext2fs_get_block_bitmap_start2(fs->block_map)) ||
	    (fs->super->s_blocks_count-1 >
	     ext2fs_get_block_bitmap_end2(fs->block_map))) {
		pctx.num = 2;
		pctx.blk = fs->super->s_first_data_block;
		pctx.blk2 = fs->super->s_blocks_count -1;
		pctx.ino = ext2fs_get_block_bitmap_start2(fs->block_map);
		pctx.ino2 = ext2fs_get_block_bitmap_end2(fs->block_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}

	csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
					       EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
redo_counts:
	had_problem = 0;
	save_problem = 0;
	pctx.blk = pctx.blk2 = NO_BLK;
	if (csum_flag &&
	    (fs->group_desc[group].bg_flags & EXT2_BG_BLOCK_UNINIT))
		skip_group++;
	for (i = fs->super->s_first_data_block;
	     i < fs->super->s_blocks_count;
	     i++) {
		actual = ext2fs_fast_test_block_bitmap2(ctx->block_found_map, i);

		if (skip_group) {
			if ((i - fs->super->s_first_data_block) %
			    fs->super->s_blocks_per_group == 0) {
				super_blk = 0;
				old_desc_blk = 0;
				new_desc_blk = 0;
				ext2fs_super_and_bgd_loc2(fs, group, &super_blk,
					 &old_desc_blk, &new_desc_blk, 0);

				if (fs->super->s_feature_incompat &
						EXT2_FEATURE_INCOMPAT_META_BG)
					old_desc_blocks =
						fs->super->s_first_meta_bg;
				else
					old_desc_blocks = fs->desc_blocks +
					fs->super->s_reserved_gdt_blocks;

				count = 0;
				cmp_block = fs->super->s_blocks_per_group;
				if (group == (int)fs->group_desc_count - 1)
					cmp_block =
						fs->super->s_blocks_count %
						fs->super->s_blocks_per_group;
			}

			bitmap = 0;
			if ((i == super_blk) ||
				(old_desc_blk && old_desc_blocks &&
				(i >= old_desc_blk) &&
				(i < old_desc_blk + old_desc_blocks)) ||
				(new_desc_blk && (i == new_desc_blk)) ||
				(i == fs->group_desc[group].bg_block_bitmap) ||
				(i == fs->group_desc[group].bg_inode_bitmap) ||
				(i >= fs->group_desc[group].bg_inode_table &&
				(i < fs->group_desc[group].bg_inode_table +
					fs->inode_blocks_per_group))) {
				bitmap = 1;
				actual = (actual != 0);
				count++;
				cmp_block--;
			} else if ((i - count - fs->super->s_first_data_block) %
				  fs->super->s_blocks_per_group == 0) {
				/*
				 * When the compare data blocks in block bitmap
				 * are 0, count the free block,
				 * skip the current block group.
				 */
				if (ext2fs_test_block_bitmap_range2(
					    ctx->block_found_map, i,
					    cmp_block)) {
					/*
					 * -1 means to skip the current block
					 * group.
					 */
					blocks = fs->super->s_blocks_per_group
									- 1;
					group_free = cmp_block;
					free_blocks += cmp_block;
					/*
					 * The current block group's last block
					 * is set to i.
					 */
					i += cmp_block - 1;
					bitmap = 1;
					goto do_counts;
				}
			}
		} else if (redo_flag)
			bitmap = actual;
		else
			bitmap = ext2fs_fast_test_block_bitmap2(fs->block_map, i);

		if (actual == bitmap)
			goto do_counts;

		if (!actual && bitmap) {
			/*
			 * Block not used, but marked in use in the bitmap.
			 */
			problem = PR_5_BLOCK_UNUSED;
		} else {
			/*
			 * Block used, but not marked in use in the bitmap.
			 */
			problem = PR_5_BLOCK_USED;

			if (skip_group) {
				struct problem_context pctx2;
				pctx2.blk = i;
				pctx2.group = group;
				if (fix_problem(ctx, PR_5_BLOCK_UNINIT,&pctx2)){
					fs->group_desc[group].bg_flags &=
						~EXT2_BG_BLOCK_UNINIT;
					skip_group = 0;
				}
			}
		}
		if (pctx.blk == NO_BLK) {
			pctx.blk = pctx.blk2 = i;
			save_problem = problem;
		} else {
			if ((problem == save_problem) &&
			    (pctx.blk2 == i-1))
				pctx.blk2++;
			else {
				print_bitmap_problem(ctx, save_problem, &pctx);
				pctx.blk = pctx.blk2 = i;
				save_problem = problem;
			}
		}
		ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
		had_problem++;

	do_counts:
		if (!bitmap && (!skip_group || csum_flag)) {
			group_free++;
			free_blocks++;
		}
		blocks ++;
		if ((blocks == fs->super->s_blocks_per_group) ||
		    (i == fs->super->s_blocks_count-1)) {
			free_array[group] = group_free;
			group ++;
			blocks = 0;
			group_free = 0;
			skip_group = 0;
			if (ctx->progress)
				if ((ctx->progress)(ctx, 5, group,
						    fs->group_desc_count*2))
					goto errout;
			if (csum_flag &&
			    (i != fs->super->s_blocks_count-1) &&
			    (fs->group_desc[group].bg_flags &
			     EXT2_BG_BLOCK_UNINIT))
				skip_group++;
		}
	}
	if (pctx.blk != NO_BLK)
		print_bitmap_problem(ctx, save_problem, &pctx);
	if (had_problem)
		fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP);
	else
		fixit = -1;
	ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;

	if (fixit == 1) {
		ext2fs_free_block_bitmap(fs->block_map);
		retval = ext2fs_copy_bitmap(ctx->block_found_map,
						  &fs->block_map);
		if (retval) {
			clear_problem_context(&pctx);
			fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			goto errout;
		}
		ext2fs_set_bitmap_padding(fs->block_map);
		ext2fs_mark_bb_dirty(fs);

		/* Redo the counts */
		blocks = 0; free_blocks = 0; group_free = 0; group = 0;
		memset(free_array, 0, fs->group_desc_count * sizeof(int));
		redo_flag++;
		goto redo_counts;
	} else if (fixit == 0)
		ext2fs_unmark_valid(fs);

	for (i = 0; i < fs->group_desc_count; i++) {
		if (free_array[i] != fs->group_desc[i].bg_free_blocks_count) {
			pctx.group = i;
			pctx.blk = fs->group_desc[i].bg_free_blocks_count;
			pctx.blk2 = free_array[i];

			if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP,
					&pctx)) {
				fs->group_desc[i].bg_free_blocks_count =
					free_array[i];
				ext2fs_mark_super_dirty(fs);
			} else
				ext2fs_unmark_valid(fs);
		}
	}
	if (free_blocks != fs->super->s_free_blocks_count) {
		pctx.group = 0;
		pctx.blk = fs->super->s_free_blocks_count;
		pctx.blk2 = free_blocks;

		if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) {
			fs->super->s_free_blocks_count = free_blocks;
			ext2fs_mark_super_dirty(fs);
		} else
			ext2fs_unmark_valid(fs);
	}
errout:
	ext2fs_free_mem(&free_array);
}
Exemple #14
0
int main(int argc, char *argv[])
{
	int c, force = 0, dry_run = 0, verbose = 0, dump = 0;
	io_channel channel;
	errcode_t retval;
	int mount_flags, csum_error = 0, io_error = 0;
	size_t i, keys_per_block;
	char *device_name, *tdb_file;
	io_manager manager = unix_io_manager;
	struct undo_context undo_ctx;
	char *buf;
	struct undo_key_block *keyb;
	struct undo_key *dkey;
	struct undo_key_info *ikey;
	__u32 key_crc, blk_crc, hdr_crc;
	blk64_t lblk;
	ext2_filsys fs;

#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
	set_com_err_gettext(gettext);
#endif
	add_error_table(&et_ext2_error_table);

	prg_name = argv[0];
	while ((c = getopt(argc, argv, "fhnvz:")) != EOF) {
		switch (c) {
		case 'f':
			force = 1;
			break;
		case 'h':
			dump = 1;
			break;
		case 'n':
			dry_run = 1;
			break;
		case 'v':
			verbose = 1;
			break;
		case 'z':
			undo_file = optarg;
			break;
		default:
			usage();
		}
	}

	if (argc != optind + 2)
		usage();

	tdb_file = argv[optind];
	device_name = argv[optind+1];

	if (undo_file && strcmp(tdb_file, undo_file) == 0) {
		printf(_("Will not write to an undo file while replaying it.\n"));
		exit(1);
	}

	/* Interpret the undo file */
	retval = manager->open(tdb_file, IO_FLAG_EXCLUSIVE,
			       &undo_ctx.undo_file);
	if (retval) {
		com_err(prg_name, errno,
				_("while opening undo file `%s'\n"), tdb_file);
		exit(1);
	}
	retval = io_channel_read_blk64(undo_ctx.undo_file, 0,
				       -(int)sizeof(undo_ctx.hdr),
				       &undo_ctx.hdr);
	if (retval) {
		com_err(prg_name, retval, _("while reading undo file"));
		exit(1);
	}
	if (memcmp(undo_ctx.hdr.magic, E2UNDO_MAGIC,
		    sizeof(undo_ctx.hdr.magic))) {
		fprintf(stderr, _("%s: Not an undo file.\n"), tdb_file);
		exit(1);
	}
	if (dump) {
		dump_header(&undo_ctx.hdr);
		exit(1);
	}
	hdr_crc = ext2fs_crc32c_le(~0, (unsigned char *)&undo_ctx.hdr,
				   sizeof(struct undo_header) -
				   sizeof(__u32));
	if (!force && ext2fs_le32_to_cpu(undo_ctx.hdr.header_crc) != hdr_crc) {
		fprintf(stderr, _("%s: Header checksum doesn't match.\n"),
			tdb_file);
		exit(1);
	}
	undo_ctx.blocksize = ext2fs_le32_to_cpu(undo_ctx.hdr.block_size);
	undo_ctx.fs_blocksize = ext2fs_le32_to_cpu(undo_ctx.hdr.fs_block_size);
	if (undo_ctx.blocksize == 0 || undo_ctx.fs_blocksize == 0) {
		fprintf(stderr, _("%s: Corrupt undo file header.\n"), tdb_file);
		exit(1);
	}
	if (!force && undo_ctx.blocksize > E2UNDO_MAX_BLOCK_SIZE) {
		fprintf(stderr, _("%s: Undo block size too large.\n"),
			tdb_file);
		exit(1);
	}
	if (!force && undo_ctx.blocksize < E2UNDO_MIN_BLOCK_SIZE) {
		fprintf(stderr, _("%s: Undo block size too small.\n"),
			tdb_file);
		exit(1);
	}
	undo_ctx.super_block = ext2fs_le64_to_cpu(undo_ctx.hdr.super_offset);
	undo_ctx.num_keys = ext2fs_le64_to_cpu(undo_ctx.hdr.num_keys);
	io_channel_set_blksize(undo_ctx.undo_file, undo_ctx.blocksize);
	if (!force && (undo_ctx.hdr.f_compat || undo_ctx.hdr.f_incompat ||
		       undo_ctx.hdr.f_rocompat)) {
		fprintf(stderr, _("%s: Unknown undo file feature set.\n"),
			tdb_file);
		exit(1);
	}

	/* open the fs */
	retval = ext2fs_check_if_mounted(device_name, &mount_flags);
	if (retval) {
		com_err(prg_name, retval, _("Error while determining whether "
				"%s is mounted."), device_name);
		exit(1);
	}

	if (mount_flags & EXT2_MF_MOUNTED) {
		com_err(prg_name, retval, "%s", _("e2undo should only be run "
						"on unmounted filesystems"));
		exit(1);
	}

	if (undo_file) {
		retval = e2undo_setup_tdb(device_name, &manager);
		if (retval)
			exit(1);
	}

	retval = manager->open(device_name,
			       IO_FLAG_EXCLUSIVE | (dry_run ? 0 : IO_FLAG_RW),
			       &channel);
	if (retval) {
		com_err(prg_name, retval,
				_("while opening `%s'"), device_name);
		exit(1);
	}

	if (!force && check_filesystem(&undo_ctx, channel))
		exit(1);

	/* prepare to read keys */
	retval = ext2fs_get_mem(sizeof(struct undo_key_info) * undo_ctx.num_keys,
				&undo_ctx.keys);
	if (retval) {
		com_err(prg_name, retval, "%s", _("while allocating memory"));
		exit(1);
	}
	ikey = undo_ctx.keys;
	retval = ext2fs_get_mem(undo_ctx.blocksize, &keyb);
	if (retval) {
		com_err(prg_name, retval, "%s", _("while allocating memory"));
		exit(1);
	}
	retval = ext2fs_get_mem(E2UNDO_MAX_EXTENT_BLOCKS * undo_ctx.blocksize,
				&buf);
	if (retval) {
		com_err(prg_name, retval, "%s", _("while allocating memory"));
		exit(1);
	}

	/* load keys */
	keys_per_block = KEYS_PER_BLOCK(&undo_ctx);
	lblk = ext2fs_le64_to_cpu(undo_ctx.hdr.key_offset);
	dbg_printf("nr_keys=%lu, kpb=%zu, blksz=%u\n",
		   undo_ctx.num_keys, keys_per_block, undo_ctx.blocksize);
	for (i = 0; i < undo_ctx.num_keys; i += keys_per_block) {
		size_t j, max_j;
		__le32 crc;

		retval = io_channel_read_blk64(undo_ctx.undo_file,
					       lblk, 1, keyb);
		if (retval) {
			com_err(prg_name, retval, "%s", _("while reading keys"));
			if (force) {
				io_error = 1;
				undo_ctx.num_keys = i - 1;
				break;
			}
			exit(1);
		}

		/* check keys */
		if (!force &&
		    ext2fs_le32_to_cpu(keyb->magic) != KEYBLOCK_MAGIC) {
			fprintf(stderr, _("%s: wrong key magic at %llu\n"),
				tdb_file, lblk);
			exit(1);
		}
		crc = keyb->crc;
		keyb->crc = 0;
		key_crc = ext2fs_crc32c_le(~0, (unsigned char *)keyb,
					   undo_ctx.blocksize);
		if (!force && ext2fs_le32_to_cpu(crc) != key_crc) {
			fprintf(stderr,
				_("%s: key block checksum error at %llu.\n"),
				tdb_file, lblk);
			exit(1);
		}

		/* load keys from key block */
		lblk++;
		max_j = undo_ctx.num_keys - i;
		if (max_j > keys_per_block)
			max_j = keys_per_block;
		for (j = 0, dkey = keyb->keys;
		     j < max_j;
		     j++, ikey++, dkey++) {
			ikey->fsblk = ext2fs_le64_to_cpu(dkey->fsblk);
			ikey->fileblk = lblk;
			ikey->blk_crc = ext2fs_le32_to_cpu(dkey->blk_crc);
			ikey->size = ext2fs_le32_to_cpu(dkey->size);
			lblk += (ikey->size + undo_ctx.blocksize - 1) /
				undo_ctx.blocksize;

			if (E2UNDO_MAX_EXTENT_BLOCKS * undo_ctx.blocksize <
			    ikey->size) {
				com_err(prg_name, retval,
					_("%s: block %llu is too long."),
					tdb_file, ikey->fsblk);
				exit(1);
			}

			/* check each block's crc */
			retval = io_channel_read_blk64(undo_ctx.undo_file,
						       ikey->fileblk,
						       -(int)ikey->size,
						       buf);
			if (retval) {
				com_err(prg_name, retval,
					_("while fetching block %llu."),
					ikey->fileblk);
				if (!force)
					exit(1);
				io_error = 1;
				continue;
			}

			blk_crc = ext2fs_crc32c_le(~0, (unsigned char *)buf,
						   ikey->size);
			if (blk_crc != ikey->blk_crc) {
				fprintf(stderr,
					_("checksum error in filesystem block "
					  "%llu (undo blk %llu)\n"),
					ikey->fsblk, ikey->fileblk);
				if (!force)
					exit(1);
				csum_error = 1;
			}
		}
	}
	ext2fs_free_mem(&keyb);

	/* sort keys in fs block order */
	qsort(undo_ctx.keys, undo_ctx.num_keys, sizeof(struct undo_key_info),
	      key_compare);

	/* replay */
	io_channel_set_blksize(channel, undo_ctx.fs_blocksize);
	for (i = 0, ikey = undo_ctx.keys; i < undo_ctx.num_keys; i++, ikey++) {
		retval = io_channel_read_blk64(undo_ctx.undo_file,
					       ikey->fileblk,
					       -(int)ikey->size,
					       buf);
		if (retval) {
			com_err(prg_name, retval,
				_("while fetching block %llu."),
				ikey->fileblk);
			io_error = 1;
			continue;
		}

		if (verbose)
			printf("Replayed block of size %u from %llu to %llu\n",
				ikey->size, ikey->fileblk, ikey->fsblk);
		if (dry_run)
			continue;
		retval = io_channel_write_blk64(channel, ikey->fsblk,
						-(int)ikey->size, buf);
		if (retval) {
			com_err(prg_name, retval,
				_("while writing block %llu."), ikey->fsblk);
			io_error = 1;
		}
	}

	if (csum_error)
		fprintf(stderr, _("Undo file corruption; run e2fsck NOW!\n"));
	if (io_error)
		fprintf(stderr, _("IO error during replay; run e2fsck NOW!\n"));
	if (!(ext2fs_le32_to_cpu(undo_ctx.hdr.state) & E2UNDO_STATE_FINISHED)) {
		force = 1;
		fprintf(stderr, _("Incomplete undo record; run e2fsck.\n"));
	}
	ext2fs_free_mem(&buf);
	ext2fs_free_mem(&undo_ctx.keys);
	io_channel_close(channel);

	/* If there were problems, try to force a fsck */
	if (!dry_run && (force || csum_error || io_error)) {
		retval = ext2fs_open2(device_name, NULL,
				   EXT2_FLAG_RW | EXT2_FLAG_64BITS, 0, 0,
				   manager, &fs);
		if (retval)
			goto out;
		fs->super->s_state &= ~EXT2_VALID_FS;
		if (csum_error || io_error)
			fs->super->s_state |= EXT2_ERROR_FS;
		ext2fs_mark_super_dirty(fs);
		ext2fs_close_free(&fs);
	}

out:
	io_channel_close(undo_ctx.undo_file);

	return csum_error;
}
Exemple #15
0
/*
 * This function creates a journal using direct I/O routines.
 */
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
				     blk_t num_blocks, blk64_t goal, int flags)
{
	char			*buf;
	errcode_t		retval;
	struct ext2_inode	inode;
	unsigned long long	inode_size;
	struct mkjournal_struct	es;

	if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags,
						       &buf)))
		return retval;

	if ((retval = ext2fs_read_bitmaps(fs)))
		goto out2;

	if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
		goto out2;

	if (inode.i_blocks > 0) {
		retval = EEXIST;
		goto out2;
	}

	es.num_blocks = num_blocks;
	es.newblocks = 0;
	es.buf = buf;
	es.err = 0;
	es.flags = flags;
	es.zero_count = 0;
	es.goal = (goal != ~0ULL) ? goal : get_midpoint_journal_block(fs);

	if (fs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_EXTENTS) {
		inode.i_flags |= EXT4_EXTENTS_FL;
		if ((retval = ext2fs_write_inode(fs, journal_ino, &inode)))
			goto out2;
	}

	retval = ext2fs_block_iterate3(fs, journal_ino, BLOCK_FLAG_APPEND,
				       0, mkjournal_proc, &es);
	if (es.err) {
		retval = es.err;
		goto errout;
	}
	if (es.zero_count) {
		retval = ext2fs_zero_blocks2(fs, es.blk_to_zero,
					    es.zero_count, 0, 0);
		if (retval)
			goto errout;
	}

	if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
		goto errout;

	inode_size = (unsigned long long)fs->blocksize * num_blocks;
	ext2fs_iblk_add_blocks(fs, &inode, es.newblocks);
	inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
	inode.i_links_count = 1;
	inode.i_mode = LINUX_S_IFREG | 0600;
	retval = ext2fs_inode_size_set(fs, &inode, inode_size);
	if (retval)
		goto errout;

	if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode)))
		goto errout;
	retval = 0;

	memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
	fs->super->s_jnl_blocks[15] = inode.i_size_high;
	fs->super->s_jnl_blocks[16] = inode.i_size;
	fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
	ext2fs_mark_super_dirty(fs);

errout:
	ext2fs_zero_blocks2(0, 0, 0, 0, 0);
out2:
	ext2fs_free_mem(&buf);
	return retval;
}
Exemple #16
0
int main (int argc, char *argv[])
{
	errcode_t	retval = 0;
	int		exit_value = FSCK_OK;
	ext2_filsys	fs = 0;
	io_manager	io_ptr;
	struct ext2_super_block *sb;
	const char	*lib_ver_date;
	int		my_ver, lib_ver;
	e2fsck_t	ctx;
	struct problem_context pctx;
	int flags, run_result;
	
	clear_problem_context(&pctx);
#ifdef MTRACE
	mtrace();
#endif
#ifdef MCHECK
	mcheck(0);
#endif
#ifdef ENABLE_NLS
	setlocale(LC_MESSAGES, "");
	setlocale(LC_CTYPE, "");
	bindtextdomain(NLS_CAT_NAME, LOCALEDIR);
	textdomain(NLS_CAT_NAME);
#endif
	my_ver = ext2fs_parse_version_string(my_ver_string);
	lib_ver = ext2fs_get_library_version(0, &lib_ver_date);
	if (my_ver > lib_ver) {
		fprintf( stderr, _("Error: ext2fs library version "
			"out of date!\n"));
		show_version_only++;
	}
	
	retval = PRS(argc, argv, &ctx);
	if (retval) {
		com_err("e2fsck", retval,
			_("while trying to initialize program"));
		exit(FSCK_ERROR);
	}
	reserve_stdio_fds();
	
#ifdef RESOURCE_TRACK
	init_resource_track(&ctx->global_rtrack);
#endif

	if (!(ctx->options & E2F_OPT_PREEN) || show_version_only)
		fprintf(stderr, "e2fsck %s (%s)\n", my_ver_string,
			 my_ver_date);

	if (show_version_only) {
		fprintf(stderr, _("\tUsing %s, %s\n"),
			error_message(EXT2_ET_BASE), lib_ver_date);
		exit(FSCK_OK);
	}
	
	check_mount(ctx);
	
	if (!(ctx->options & E2F_OPT_PREEN) &&
	    !(ctx->options & E2F_OPT_NO) &&
	    !(ctx->options & E2F_OPT_YES)) {
		if (!ctx->interactive)
			fatal_error(ctx,
				    _("need terminal for interactive repairs"));
	}
	ctx->superblock = ctx->use_superblock;
restart:
#ifdef CONFIG_TESTIO_DEBUG
	io_ptr = test_io_manager;
	test_io_backing_manager = unix_io_manager;
#else
	io_ptr = unix_io_manager;
#endif
	flags = 0;
	if ((ctx->options & E2F_OPT_READONLY) == 0)
		flags |= EXT2_FLAG_RW;

	if (ctx->superblock && ctx->blocksize) {
		retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options, 
				      flags, ctx->superblock, ctx->blocksize,
				      io_ptr, &fs);
	} else if (ctx->superblock) {
		int blocksize;
		for (blocksize = EXT2_MIN_BLOCK_SIZE;
		     blocksize <= EXT2_MAX_BLOCK_SIZE; blocksize *= 2) {
			retval = ext2fs_open2(ctx->filesystem_name, 
					      ctx->io_options, flags,
					      ctx->superblock, blocksize,
					      io_ptr, &fs);
			if (!retval)
				break;
		}
	} else 
		retval = ext2fs_open2(ctx->filesystem_name, ctx->io_options, 
				      flags, 0, 0, io_ptr, &fs);
	if (!ctx->superblock && !(ctx->options & E2F_OPT_PREEN) &&
	    !(ctx->flags & E2F_FLAG_SB_SPECIFIED) &&
	    ((retval == EXT2_ET_BAD_MAGIC) ||
	     ((retval == 0) && ext2fs_check_desc(fs)))) {
		if (!fs || (fs->group_desc_count > 1)) {
			printf(_("%s trying backup blocks...\n"),
			       retval ? _("Couldn't find ext2 superblock,") :
			       _("Group descriptors look bad..."));
			get_backup_sb(ctx, fs, ctx->filesystem_name, io_ptr);
			if (fs)
				ext2fs_close(fs);
			goto restart;
		}
	}
	if (retval) {
		com_err(ctx->program_name, retval, _("while trying to open %s"),
			ctx->filesystem_name);
		if (retval == EXT2_ET_REV_TOO_HIGH) {
			printf(_("The filesystem revision is apparently "
			       "too high for this version of e2fsck.\n"
			       "(Or the filesystem superblock "
			       "is corrupt)\n\n"));
			fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
		} else if (retval == EXT2_ET_SHORT_READ)
			printf(_("Could this be a zero-length partition?\n"));
		else if ((retval == EPERM) || (retval == EACCES))
			printf(_("You must have %s access to the "
			       "filesystem or be root\n"),
			       (ctx->options & E2F_OPT_READONLY) ?
			       "r/o" : "r/w");
		else if (retval == ENXIO)
			printf(_("Possibly non-existent or swap device?\n"));
#ifdef EROFS
		else if (retval == EROFS)
			printf(_("Disk write-protected; use the -n option "
			       "to do a read-only\n"
			       "check of the device.\n"));
#endif
		else
			fix_problem(ctx, PR_0_SB_CORRUPT, &pctx);
		fatal_error(ctx, 0);
	}
	ctx->fs = fs;
	fs->priv_data = ctx;
	sb = fs->super;
	if (sb->s_rev_level > E2FSCK_CURRENT_REV) {
		com_err(ctx->program_name, EXT2_ET_REV_TOO_HIGH,
			_("while trying to open %s"),
			ctx->filesystem_name);
	get_newer:
		fatal_error(ctx, _("Get a newer version of e2fsck!"));
	}

	/*
	 * Set the device name, which is used whenever we print error
	 * or informational messages to the user.
	 */
	if (ctx->device_name == 0 &&
	    (sb->s_volume_name[0] != 0)) {
		ctx->device_name = string_copy(ctx, sb->s_volume_name,
					       sizeof(sb->s_volume_name));
	}
	if (ctx->device_name == 0)
		ctx->device_name = ctx->filesystem_name;

	/*
	 * Make sure the ext3 superblock fields are consistent.
	 */
	retval = e2fsck_check_ext3_journal(ctx);
	if (retval) {
		com_err(ctx->program_name, retval,
			_("while checking ext3 journal for %s"),
			ctx->device_name);
		fatal_error(ctx, 0);
	}

	/*
	 * Check to see if we need to do ext3-style recovery.  If so,
	 * do it, and then restart the fsck.
	 */
	if (sb->s_feature_incompat & EXT3_FEATURE_INCOMPAT_RECOVER) {
		if (ctx->options & E2F_OPT_READONLY) {
			printf(_("Warning: skipping journal recovery "
				 "because doing a read-only filesystem "
				 "check.\n"));
			io_channel_flush(ctx->fs->io);
		} else {
			if (ctx->flags & E2F_FLAG_RESTARTED) {
				/*
				 * Whoops, we attempted to run the
				 * journal twice.  This should never
				 * happen, unless the hardware or
				 * device driver is being bogus.
				 */
				com_err(ctx->program_name, 0,
					_("unable to set superblock flags on %s\n"), ctx->device_name);
				fatal_error(ctx, 0);
			}
			retval = e2fsck_run_ext3_journal(ctx);
			if (retval) {
				com_err(ctx->program_name, retval,
				_("while recovering ext3 journal of %s"),
					ctx->device_name);
				fatal_error(ctx, 0);
			}
			ext2fs_close(ctx->fs);
			ctx->fs = 0;
			ctx->flags |= E2F_FLAG_RESTARTED;
			goto restart;
		}
	}

	/*
	 * Check for compatibility with the feature sets.  We need to
	 * be more stringent than ext2fs_open().
	 */
	if ((sb->s_feature_compat & ~EXT2_LIB_FEATURE_COMPAT_SUPP) ||
	    (sb->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP)) {
		com_err(ctx->program_name, EXT2_ET_UNSUPP_FEATURE,
			"(%s)", ctx->device_name);
		goto get_newer;
	}
	if (sb->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
		com_err(ctx->program_name, EXT2_ET_RO_UNSUPP_FEATURE,
			"(%s)", ctx->device_name);
		goto get_newer;
	}
#ifdef ENABLE_COMPRESSION
	if (sb->s_feature_incompat & EXT2_FEATURE_INCOMPAT_COMPRESSION)
		com_err(ctx->program_name, 0,
			_("Warning: compression support is experimental.\n"));
#endif
#ifndef ENABLE_HTREE
	if (sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) {
		com_err(ctx->program_name, 0,
			_("E2fsck not compiled with HTREE support,\n\t"
			  "but filesystem %s has HTREE directories.\n"),
			ctx->device_name);
		goto get_newer;
	}
#endif

	/*
	 * If the user specified a specific superblock, presumably the
	 * master superblock has been trashed.  So we mark the
	 * superblock as dirty, so it can be written out.
	 */
	if (ctx->superblock &&
	    !(ctx->options & E2F_OPT_READONLY))
		ext2fs_mark_super_dirty(fs);

	/*
	 * We only update the master superblock because (a) paranoia;
	 * we don't want to corrupt the backup superblocks, and (b) we
	 * don't need to update the mount count and last checked
	 * fields in the backup superblock (the kernel doesn't
	 * update the backup superblocks anyway).
	 */
	fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;

	ehandler_init(fs->io);

	if (ctx->superblock)
		set_latch_flags(PR_LATCH_RELOC, PRL_LATCHED, 0);
	ext2fs_mark_valid(fs);
	check_super_block(ctx);
	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
		fatal_error(ctx, 0);
	check_if_skip(ctx);
	if (bad_blocks_file)
		read_bad_blocks_file(ctx, bad_blocks_file, replace_bad_blocks);
	else if (cflag)
		read_bad_blocks_file(ctx, 0, !keep_bad_blocks); /* Test disk */
	if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
		fatal_error(ctx, 0);
#ifdef ENABLE_SWAPFS
	if (normalize_swapfs) {
		if ((fs->flags & EXT2_FLAG_SWAP_BYTES) ==
		    ext2fs_native_flag()) {
			fprintf(stderr, _("%s: Filesystem byte order "
				"already normalized.\n"), ctx->device_name);
			fatal_error(ctx, 0);
		}
	}
	if (swapfs) {
		swap_filesys(ctx);
		if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
			fatal_error(ctx, 0);
	}
#endif

	/*
	 * Mark the system as valid, 'til proven otherwise
	 */
	ext2fs_mark_valid(fs);

	retval = ext2fs_read_bb_inode(fs, &fs->badblocks);
	if (retval) {
		com_err(ctx->program_name, retval,
			_("while reading bad blocks inode"));
		preenhalt(ctx);
		printf(_("This doesn't bode well,"
			 " but we'll try to go on...\n"));
	}

	run_result = e2fsck_run(ctx);
	e2fsck_clear_progbar(ctx);
	if (run_result == E2F_FLAG_RESTART) {
		printf(_("Restarting e2fsck from the beginning...\n"));
		retval = e2fsck_reset_context(ctx);
		if (retval) {
			com_err(ctx->program_name, retval,
				_("while resetting context"));
			fatal_error(ctx, 0);
		}
		ext2fs_close(fs);
		goto restart;
	}
	if (run_result & E2F_FLAG_CANCEL) {
		printf(_("%s: e2fsck canceled.\n"), ctx->device_name ?
		       ctx->device_name : ctx->filesystem_name);
		exit_value |= FSCK_CANCELED;
	}
	if (run_result & E2F_FLAG_ABORT)
		fatal_error(ctx, _("aborted"));

#ifdef MTRACE
	mtrace_print("Cleanup");
#endif
	if (ext2fs_test_changed(fs)) {
		exit_value |= FSCK_NONDESTRUCT;
		if (!(ctx->options & E2F_OPT_PREEN))
		    printf(_("\n%s: ***** FILE SYSTEM WAS MODIFIED *****\n"),
			       ctx->device_name);
		if (ctx->mount_flags & EXT2_MF_ISROOT) {
			printf(_("%s: ***** REBOOT LINUX *****\n"),
			       ctx->device_name);
			exit_value |= FSCK_REBOOT;
		}
	}
	if (!ext2fs_test_valid(fs)) {
		printf(_("\n%s: ********** WARNING: Filesystem still has "
			 "errors **********\n\n"), ctx->device_name);
		exit_value |= FSCK_UNCORRECTED;
		exit_value &= ~FSCK_NONDESTRUCT;
	}
	if (exit_value & FSCK_CANCELED)
		exit_value &= ~FSCK_NONDESTRUCT;
	else {
		show_stats(ctx);
		if (!(ctx->options & E2F_OPT_READONLY)) {
			if (ext2fs_test_valid(fs)) {
				if (!(sb->s_state & EXT2_VALID_FS))
					exit_value |= FSCK_NONDESTRUCT;
				sb->s_state = EXT2_VALID_FS;
			} else
				sb->s_state &= ~EXT2_VALID_FS;
			sb->s_mnt_count = 0;
			sb->s_lastcheck = ctx->now;
			ext2fs_mark_super_dirty(fs);
		}
	}

	e2fsck_write_bitmaps(ctx);
	
	ext2fs_close(fs);
	ctx->fs = NULL;
	free(ctx->filesystem_name);
	free(ctx->journal_name);
	e2fsck_free_context(ctx);
	
#ifdef RESOURCE_TRACK
	if (ctx->options & E2F_OPT_TIME)
		print_resource_track(NULL, &ctx->global_rtrack);
#endif

	return exit_value;
}
Exemple #17
0
/*
 * This function adds a journal inode to a filesystem, using either
 * POSIX routines if the filesystem is mounted, or using direct I/O
 * functions if it is not.
 */
errcode_t ext2fs_add_journal_inode2(ext2_filsys fs, blk_t num_blocks,
				    blk64_t goal, int flags)
{
	errcode_t		retval;
	ext2_ino_t		journal_ino;
	struct stat		st;
	char			jfile[1024];
	int			mount_flags;
	int			fd = -1;

	if (flags & EXT2_MKJOURNAL_NO_MNT_CHECK)
		mount_flags = 0;
	else if ((retval = ext2fs_check_mount_point(fs->device_name,
						    &mount_flags,
						    jfile, sizeof(jfile)-10)))
		return retval;

	if (mount_flags & EXT2_MF_MOUNTED) {
#if HAVE_EXT2_IOCTLS
		int f = 0;
#endif
		strcat(jfile, "/.journal");

		/*
		 * If .../.journal already exists, make sure any
		 * immutable or append-only flags are cleared.
		 */
#if defined(HAVE_CHFLAGS) && defined(UF_NODUMP)
		(void) chflags (jfile, 0);
#else
#if HAVE_EXT2_IOCTLS
		fd = open(jfile, O_RDONLY);
		if (fd >= 0) {
			retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
			close(fd);
			if (retval)
				return retval;
		}
#endif
#endif

		/* Create the journal file */
		if ((fd = open(jfile, O_CREAT|O_WRONLY, 0600)) < 0)
			return errno;

		/* Note that we can't do lazy journal initialization for mounted
		 * filesystems, since the zero writing is also allocating the
		 * journal blocks.  We could use fallocate, but not all kernels
		 * support that, and creating a journal on a mounted ext2
		 * filesystems is extremely rare these days...  Ignore it. */
		flags &= ~EXT2_MKJOURNAL_LAZYINIT;

		if ((retval = write_journal_file(fs, jfile, num_blocks, flags)))
			goto errout;

		/* Get inode number of the journal file */
		if (fstat(fd, &st) < 0) {
			retval = errno;
			goto errout;
		}

#if defined(HAVE_CHFLAGS) && defined(UF_NODUMP)
		retval = fchflags (fd, UF_NODUMP|UF_IMMUTABLE);
#else
#if HAVE_EXT2_IOCTLS
		if (ioctl(fd, EXT2_IOC_GETFLAGS, &f) < 0) {
			retval = errno;
			goto errout;
		}
		f |= EXT2_NODUMP_FL | EXT2_IMMUTABLE_FL;
		retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
#endif
#endif
		if (retval) {
			retval = errno;
			goto errout;
		}

		if (close(fd) < 0) {
			retval = errno;
			fd = -1;
			goto errout;
		}
		journal_ino = st.st_ino;
	} else {
		if ((mount_flags & EXT2_MF_BUSY) &&
		    !(fs->flags & EXT2_FLAG_EXCLUSIVE)) {
			retval = EBUSY;
			goto errout;
		}
		journal_ino = EXT2_JOURNAL_INO;
		if ((retval = write_journal_inode(fs, journal_ino,
						  num_blocks, goal, flags)))
			return retval;
	}

	fs->super->s_journal_inum = journal_ino;
	fs->super->s_journal_dev = 0;
	memset(fs->super->s_journal_uuid, 0,
	       sizeof(fs->super->s_journal_uuid));
	fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL;

	ext2fs_mark_super_dirty(fs);
	return 0;
errout:
	if (fd >= 0)
		close(fd);
	return retval;
}
static void check_block_bitmaps(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	blk64_t	i;
	unsigned int	*free_array;
	dgrp_t		g, group = 0;
	unsigned int	blocks = 0;
	blk64_t	free_blocks = 0;
	blk64_t first_free = ext2fs_blocks_count(fs->super);
	unsigned int	group_free = 0;
	int	actual, bitmap;
	struct problem_context	pctx;
	problem_t	problem, save_problem;
	int		fixit, had_problem;
	errcode_t	retval;
	int	old_desc_blocks = 0;
	int	count = 0;
	int	cmp_block = 0;
	int	redo_flag = 0;
	blk64_t	super_blk, old_desc_blk, new_desc_blk;
	char *actual_buf, *bitmap_buf;

	actual_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize,
						     "actual bitmap buffer");
	bitmap_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize,
						     "bitmap block buffer");

	clear_problem_context(&pctx);
	free_array = (unsigned int *) e2fsck_allocate_memory(ctx,
	    fs->group_desc_count * sizeof(unsigned int), "free block count array");

	if ((B2C(fs->super->s_first_data_block) <
	     ext2fs_get_block_bitmap_start2(ctx->block_found_map)) ||
	    (B2C(ext2fs_blocks_count(fs->super)-1) >
	     ext2fs_get_block_bitmap_end2(ctx->block_found_map))) {
		pctx.num = 1;
		pctx.blk = B2C(fs->super->s_first_data_block);
		pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1);
		pctx.ino = ext2fs_get_block_bitmap_start2(ctx->block_found_map);
		pctx.ino2 = ext2fs_get_block_bitmap_end2(ctx->block_found_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}

	if ((B2C(fs->super->s_first_data_block) <
	     ext2fs_get_block_bitmap_start2(fs->block_map)) ||
	    (B2C(ext2fs_blocks_count(fs->super)-1) >
	     ext2fs_get_block_bitmap_end2(fs->block_map))) {
		pctx.num = 2;
		pctx.blk = B2C(fs->super->s_first_data_block);
		pctx.blk2 = B2C(ext2fs_blocks_count(fs->super) - 1);
		pctx.ino = ext2fs_get_block_bitmap_start2(fs->block_map);
		pctx.ino2 = ext2fs_get_block_bitmap_end2(fs->block_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}

redo_counts:
	had_problem = 0;
	save_problem = 0;
	pctx.blk = pctx.blk2 = NO_BLK;
	for (i = B2C(fs->super->s_first_data_block);
	     i < ext2fs_blocks_count(fs->super);
	     i += EXT2FS_CLUSTER_RATIO(fs)) {
		int first_block_in_bg = (B2C(i) -
					 B2C(fs->super->s_first_data_block)) %
			fs->super->s_clusters_per_group == 0;
		int n, nbytes = fs->super->s_clusters_per_group / 8;

		actual = ext2fs_fast_test_block_bitmap2(ctx->block_found_map, i);

		/*
		 * Try to optimize pass5 by extracting a bitmap block
		 * as expected from what we have on disk, and then
		 * comparing the two.  If they are identical, then
		 * update the free block counts and go on to the next
		 * block group.  This is much faster than doing the
		 * individual bit-by-bit comparison.  The one downside
		 * is that this doesn't work if we are asking e2fsck
		 * to do a discard operation.
		 */
		if (!first_block_in_bg ||
		    (group == (int)fs->group_desc_count - 1) ||
		    (ctx->options & E2F_OPT_DISCARD))
			goto no_optimize;

		retval = ext2fs_get_block_bitmap_range2(ctx->block_found_map,
				B2C(i), fs->super->s_clusters_per_group,
				actual_buf);
		if (retval)
			goto no_optimize;
		retval = ext2fs_get_block_bitmap_range2(fs->block_map,
				B2C(i), fs->super->s_clusters_per_group,
				bitmap_buf);
		if (retval)
			goto no_optimize;
		if (memcmp(actual_buf, bitmap_buf, nbytes) != 0)
			goto no_optimize;
		n = ext2fs_bitcount(actual_buf, nbytes);
		group_free = fs->super->s_clusters_per_group - n;
		free_blocks += group_free;
		i += EXT2FS_C2B(fs, fs->super->s_clusters_per_group - 1);
		goto next_group;
	no_optimize:

		if (redo_flag)
			bitmap = actual;
		else
			bitmap = ext2fs_fast_test_block_bitmap2(fs->block_map, i);

		if (!actual == !bitmap)
			goto do_counts;

		if (!actual && bitmap) {
			/*
			 * Block not used, but marked in use in the bitmap.
			 */
			problem = PR_5_BLOCK_UNUSED;
		} else {
			/*
			 * Block used, but not marked in use in the bitmap.
			 */
			problem = PR_5_BLOCK_USED;

			if (ext2fs_bg_flags_test(fs, group,
						 EXT2_BG_BLOCK_UNINIT)) {
				struct problem_context pctx2;
				pctx2.blk = i;
				pctx2.group = group;
				if (fix_problem(ctx, PR_5_BLOCK_UNINIT,
						&pctx2))
					ext2fs_bg_flags_clear(fs, group,
							EXT2_BG_BLOCK_UNINIT);
			}
		}
		if (pctx.blk == NO_BLK) {
			pctx.blk = pctx.blk2 = i;
			save_problem = problem;
		} else {
			if ((problem == save_problem) &&
			    (pctx.blk2 == i - EXT2FS_CLUSTER_RATIO(fs)))
				pctx.blk2 += EXT2FS_CLUSTER_RATIO(fs);
			else {
				print_bitmap_problem(ctx, save_problem, &pctx);
				pctx.blk = pctx.blk2 = i;
				save_problem = problem;
			}
		}
		ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
		had_problem++;

		/*
		 * If there a problem we should turn off the discard so we
		 * do not compromise the filesystem.
		 */
		ctx->options &= ~E2F_OPT_DISCARD;

	do_counts:
		if (!bitmap) {
			group_free++;
			free_blocks++;
			if (first_free > i)
				first_free = i;
		} else if (i > first_free) {
			e2fsck_discard_blocks(ctx, first_free,
					      (i - first_free));
			first_free = ext2fs_blocks_count(fs->super);
		}
		blocks ++;
		if ((blocks == fs->super->s_clusters_per_group) ||
		    (EXT2FS_B2C(fs, i) ==
		     EXT2FS_B2C(fs, ext2fs_blocks_count(fs->super)-1))) {
			/*
			 * If the last block of this group is free, then we can
			 * discard it as well.
			 */
			if (!bitmap && i >= first_free)
				e2fsck_discard_blocks(ctx, first_free,
						      (i - first_free) + 1);
		next_group:
			first_free = ext2fs_blocks_count(fs->super);

			free_array[group] = group_free;
			group ++;
			blocks = 0;
			group_free = 0;
			if (ctx->progress)
				if ((ctx->progress)(ctx, 5, group,
						    fs->group_desc_count*2))
					goto errout;
		}
	}
	if (pctx.blk != NO_BLK)
		print_bitmap_problem(ctx, save_problem, &pctx);
	if (had_problem)
		fixit = end_problem_latch(ctx, PR_LATCH_BBITMAP);
	else
		fixit = -1;
	ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;

	if (fixit == 1) {
		ext2fs_free_block_bitmap(fs->block_map);
		retval = ext2fs_copy_bitmap(ctx->block_found_map,
						  &fs->block_map);
		if (retval) {
			clear_problem_context(&pctx);
			fix_problem(ctx, PR_5_COPY_BBITMAP_ERROR, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			goto errout;
		}
		ext2fs_set_bitmap_padding(fs->block_map);
		ext2fs_mark_bb_dirty(fs);

		/* Redo the counts */
		blocks = 0; free_blocks = 0; group_free = 0; group = 0;
		memset(free_array, 0, fs->group_desc_count * sizeof(int));
		redo_flag++;
		goto redo_counts;
	} else if (fixit == 0)
		ext2fs_unmark_valid(fs);

	for (g = 0; g < fs->group_desc_count; g++) {
		if (free_array[g] != ext2fs_bg_free_blocks_count(fs, g)) {
			pctx.group = g;
			pctx.blk = ext2fs_bg_free_blocks_count(fs, g);
			pctx.blk2 = free_array[g];

			if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT_GROUP,
					&pctx)) {
				ext2fs_bg_free_blocks_count_set(fs, g, free_array[g]);
				ext2fs_mark_super_dirty(fs);
			} else
				ext2fs_unmark_valid(fs);
		}
	}
	free_blocks = EXT2FS_C2B(fs, free_blocks);
	if (free_blocks != ext2fs_free_blocks_count(fs->super)) {
		pctx.group = 0;
		pctx.blk = ext2fs_free_blocks_count(fs->super);
		pctx.blk2 = free_blocks;

		if (fix_problem(ctx, PR_5_FREE_BLOCK_COUNT, &pctx)) {
			ext2fs_free_blocks_count_set(fs->super, free_blocks);
			ext2fs_mark_super_dirty(fs);
		}
	}
errout:
	ext2fs_free_mem(&free_array);
	ext2fs_free_mem(&actual_buf);
	ext2fs_free_mem(&bitmap_buf);
}
/*
 * This function adds a journal inode to a filesystem, using either
 * POSIX routines if the filesystem is mounted, or using direct I/O
 * functions if it is not.
 */
errcode_t ext2fs_add_journal_inode(ext2_filsys fs, blk_t size, int flags)
{
	errcode_t		retval;
	ext2_ino_t		journal_ino;
	struct stat		st;
	char			jfile[1024];
	int			mount_flags, f;
	int			fd = -1;

	if ((retval = ext2fs_check_mount_point(fs->device_name, &mount_flags,
					       jfile, sizeof(jfile)-10)))
		return retval;

	if (mount_flags & EXT2_MF_MOUNTED) {
		strcat(jfile, "/.journal");

		/*
		 * If .../.journal already exists, make sure any
		 * immutable or append-only flags are cleared.
		 */
#if defined(HAVE_CHFLAGS) && defined(UF_NODUMP)
		(void) chflags (jfile, 0);
#else
#if HAVE_EXT2_IOCTLS
		fd = open(jfile, O_RDONLY);
		if (fd >= 0) {
			f = 0;
			ioctl(fd, EXT2_IOC_SETFLAGS, &f);
			close(fd);
		}
#endif
#endif

		/* Create the journal file */
		if ((fd = open(jfile, O_CREAT|O_WRONLY, 0600)) < 0)
			return errno;

		if ((retval = write_journal_file(fs, jfile, size, flags)))
			goto errout;

		/* Get inode number of the journal file */
		if (fstat(fd, &st) < 0) {
			retval = errno;
			goto errout;
		}

#if defined(HAVE_CHFLAGS) && defined(UF_NODUMP)
		retval = fchflags (fd, UF_NODUMP|UF_IMMUTABLE);
#else
#if HAVE_EXT2_IOCTLS
		if (ioctl(fd, EXT2_IOC_GETFLAGS, &f) < 0) {
			retval = errno;
			goto errout;
		}
		f |= EXT2_NODUMP_FL | EXT2_IMMUTABLE_FL;
		retval = ioctl(fd, EXT2_IOC_SETFLAGS, &f);
#endif
#endif
		if (retval) {
			retval = errno;
			goto errout;
		}

		if (close(fd) < 0) {
			retval = errno;
			fd = -1;
			goto errout;
		}
		journal_ino = st.st_ino;
	} else {
		if ((mount_flags & EXT2_MF_BUSY) &&
		    !(fs->flags & EXT2_FLAG_EXCLUSIVE)) {
			retval = EBUSY;
			goto errout;
		}
		journal_ino = EXT2_JOURNAL_INO;
		if ((retval = write_journal_inode(fs, journal_ino,
						  size, flags)))
			return retval;
	}

	fs->super->s_journal_inum = journal_ino;
	fs->super->s_journal_dev = 0;
	memset(fs->super->s_journal_uuid, 0,
	       sizeof(fs->super->s_journal_uuid));
	fs->super->s_feature_compat |= EXT3_FEATURE_COMPAT_HAS_JOURNAL;

	ext2fs_mark_super_dirty(fs);
	return 0;
errout:
	if (fd > 0)
		close(fd);
	return retval;
}
static void check_inode_bitmaps(e2fsck_t ctx)
{
	ext2_filsys fs = ctx->fs;
	ext2_ino_t	i;
	unsigned int	free_inodes = 0;
	int		group_free = 0;
	int		dirs_count = 0;
	dgrp_t		group = 0;
	unsigned int	inodes = 0;
	ext2_ino_t	*free_array;
	ext2_ino_t	*dir_array;
	int		actual, bitmap;
	errcode_t	retval;
	struct problem_context	pctx;
	problem_t	problem, save_problem;
	int		fixit, had_problem;
	int		csum_flag;
	int		skip_group = 0;
	int		redo_flag = 0;
	ext2_ino_t		first_free = fs->super->s_inodes_per_group + 1;

	clear_problem_context(&pctx);
	free_array = (ext2_ino_t *) e2fsck_allocate_memory(ctx,
	    fs->group_desc_count * sizeof(ext2_ino_t), "free inode count array");

	dir_array = (ext2_ino_t *) e2fsck_allocate_memory(ctx,
	   fs->group_desc_count * sizeof(ext2_ino_t), "directory count array");

	if ((1 < ext2fs_get_inode_bitmap_start2(ctx->inode_used_map)) ||
	    (fs->super->s_inodes_count >
	     ext2fs_get_inode_bitmap_end2(ctx->inode_used_map))) {
		pctx.num = 3;
		pctx.blk = 1;
		pctx.blk2 = fs->super->s_inodes_count;
		pctx.ino = ext2fs_get_inode_bitmap_start2(ctx->inode_used_map);
		pctx.ino2 = ext2fs_get_inode_bitmap_end2(ctx->inode_used_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}
	if ((1 < ext2fs_get_inode_bitmap_start2(fs->inode_map)) ||
	    (fs->super->s_inodes_count >
	     ext2fs_get_inode_bitmap_end2(fs->inode_map))) {
		pctx.num = 4;
		pctx.blk = 1;
		pctx.blk2 = fs->super->s_inodes_count;
		pctx.ino = ext2fs_get_inode_bitmap_start2(fs->inode_map);
		pctx.ino2 = ext2fs_get_inode_bitmap_end2(fs->inode_map);
		fix_problem(ctx, PR_5_BMAP_ENDPOINTS, &pctx);

		ctx->flags |= E2F_FLAG_ABORT; /* fatal */
		goto errout;
	}

	csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
					       EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
redo_counts:
	had_problem = 0;
	save_problem = 0;
	pctx.ino = pctx.ino2 = 0;
	if (csum_flag &&
	    (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)))
		skip_group++;

	/* Protect loop from wrap-around if inodes_count is maxed */
	for (i = 1; i <= fs->super->s_inodes_count && i > 0; i++) {
		bitmap = 0;
		if (skip_group &&
		    i % fs->super->s_inodes_per_group == 1) {
			/*
			 * Current inode is the first inode
			 * in the current block group.
			 */
			if (ext2fs_test_inode_bitmap_range(
				    ctx->inode_used_map, i,
				    fs->super->s_inodes_per_group)) {
				/*
				 * When the compared inodes in inodes bitmap
				 * are 0, count the free inode,
				 * skip the current block group.
				 */
				first_free = 1;
				inodes = fs->super->s_inodes_per_group - 1;
				group_free = inodes;
				free_inodes += inodes;
				i += inodes;
				skip_group = 0;
				goto do_counts;
			}
		}

		actual = ext2fs_fast_test_inode_bitmap2(ctx->inode_used_map, i);
		if (redo_flag)
			bitmap = actual;
		else if (!skip_group)
			bitmap = ext2fs_fast_test_inode_bitmap2(fs->inode_map, i);
		if (!actual == !bitmap)
			goto do_counts;

		if (!actual && bitmap) {
			/*
			 * Inode wasn't used, but marked in bitmap
			 */
			problem = PR_5_INODE_UNUSED;
		} else /* if (actual && !bitmap) */ {
			/*
			 * Inode used, but not in bitmap
			 */
			problem = PR_5_INODE_USED;

			/* We should never hit this, because it means that
			 * inodes were marked in use that weren't noticed
			 * in pass1 or pass 2. It is easier to fix the problem
			 * than to kill e2fsck and leave the user stuck. */
			if (skip_group) {
				struct problem_context pctx2;
				pctx2.blk = i;
				pctx2.group = group;
				if (fix_problem(ctx, PR_5_INODE_UNINIT,&pctx2)){
					ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT);
					skip_group = 0;
				}
			}
		}
		if (pctx.ino == 0) {
			pctx.ino = pctx.ino2 = i;
			save_problem = problem;
		} else {
			if ((problem == save_problem) &&
			    (pctx.ino2 == i-1))
				pctx.ino2++;
			else {
				print_bitmap_problem(ctx, save_problem, &pctx);
				pctx.ino = pctx.ino2 = i;
				save_problem = problem;
			}
		}
		ctx->flags |= E2F_FLAG_PROG_SUPPRESS;
		had_problem++;
		/*
		 * If there a problem we should turn off the discard so we
		 * do not compromise the filesystem.
		 */
		ctx->options &= ~E2F_OPT_DISCARD;

do_counts:
		inodes++;
		if (bitmap) {
			if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, i))
				dirs_count++;
			if (inodes > first_free) {
				e2fsck_discard_inodes(ctx, group, first_free,
						      inodes - first_free);
				first_free = fs->super->s_inodes_per_group + 1;
			}
		} else {
			group_free++;
			free_inodes++;
			if (first_free > inodes)
				first_free = inodes;
		}

		if ((inodes == fs->super->s_inodes_per_group) ||
		    (i == fs->super->s_inodes_count)) {
			/*
			 * If the last inode is free, we can discard it as well.
			 */
			if (!bitmap && inodes >= first_free)
				e2fsck_discard_inodes(ctx, group, first_free,
						      inodes - first_free + 1);
			/*
			 * If discard zeroes data and the group inode table
			 * was not zeroed yet, set itable as zeroed
			 */
			if ((ctx->options & E2F_OPT_DISCARD) &&
			    io_channel_discard_zeroes_data(fs->io) &&
			    !(ext2fs_bg_flags_test(fs, group,
						   EXT2_BG_INODE_ZEROED))) {
				ext2fs_bg_flags_set(fs, group,
						    EXT2_BG_INODE_ZEROED);
				ext2fs_group_desc_csum_set(fs, group);
			}

			first_free = fs->super->s_inodes_per_group + 1;
			free_array[group] = group_free;
			dir_array[group] = dirs_count;
			group ++;
			inodes = 0;
			skip_group = 0;
			group_free = 0;
			dirs_count = 0;
			if (ctx->progress)
				if ((ctx->progress)(ctx, 5,
					    group + fs->group_desc_count,
					    fs->group_desc_count*2))
					goto errout;
			if (csum_flag &&
			    (i != fs->super->s_inodes_count) &&
			    (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)
			     ))
				skip_group++;
		}
	}
	if (pctx.ino)
		print_bitmap_problem(ctx, save_problem, &pctx);

	if (had_problem)
		fixit = end_problem_latch(ctx, PR_LATCH_IBITMAP);
	else
		fixit = -1;
	ctx->flags &= ~E2F_FLAG_PROG_SUPPRESS;

	if (fixit == 1) {
		ext2fs_free_inode_bitmap(fs->inode_map);
		retval = ext2fs_copy_bitmap(ctx->inode_used_map,
						  &fs->inode_map);
		if (retval) {
			clear_problem_context(&pctx);
			fix_problem(ctx, PR_5_COPY_IBITMAP_ERROR, &pctx);
			ctx->flags |= E2F_FLAG_ABORT;
			goto errout;
		}
		ext2fs_set_bitmap_padding(fs->inode_map);
		ext2fs_mark_ib_dirty(fs);

		/* redo counts */
		inodes = 0; free_inodes = 0; group_free = 0;
		dirs_count = 0; group = 0;
		memset(free_array, 0, fs->group_desc_count * sizeof(int));
		memset(dir_array, 0, fs->group_desc_count * sizeof(int));
		redo_flag++;
		goto redo_counts;
	} else if (fixit == 0)
		ext2fs_unmark_valid(fs);

	for (i = 0; i < fs->group_desc_count; i++) {
		if (free_array[i] != ext2fs_bg_free_inodes_count(fs, i)) {
			pctx.group = i;
			pctx.ino = ext2fs_bg_free_inodes_count(fs, i);
			pctx.ino2 = free_array[i];
			if (fix_problem(ctx, PR_5_FREE_INODE_COUNT_GROUP,
					&pctx)) {
				ext2fs_bg_free_inodes_count_set(fs, i, free_array[i]);
				ext2fs_mark_super_dirty(fs);
			} else
				ext2fs_unmark_valid(fs);
		}
		if (dir_array[i] != ext2fs_bg_used_dirs_count(fs, i)) {
			pctx.group = i;
			pctx.ino = ext2fs_bg_used_dirs_count(fs, i);
			pctx.ino2 = dir_array[i];

			if (fix_problem(ctx, PR_5_FREE_DIR_COUNT_GROUP,
					&pctx)) {
				ext2fs_bg_used_dirs_count_set(fs, i, dir_array[i]);
				ext2fs_mark_super_dirty(fs);
			} else
				ext2fs_unmark_valid(fs);
		}
	}
	if (free_inodes != fs->super->s_free_inodes_count) {
		pctx.group = -1;
		pctx.ino = fs->super->s_free_inodes_count;
		pctx.ino2 = free_inodes;

		if (fix_problem(ctx, PR_5_FREE_INODE_COUNT, &pctx)) {
			fs->super->s_free_inodes_count = free_inodes;
			ext2fs_mark_super_dirty(fs);
		}
	}
errout:
	ext2fs_free_mem(&free_array);
	ext2fs_free_mem(&dir_array);
}
Exemple #21
0
static int check_dir_block(ext2_filsys fs,
			   struct ext2_db_entry2 *db,
			   void *priv_data)
{
 	struct dx_dir_info	*dx_dir;
#ifdef ENABLE_HTREE
	struct dx_dirblock_info	*dx_db = 0;
#endif /* ENABLE_HTREE */
	struct ext2_dir_entry 	*dirent, *prev;
	ext2_dirhash_t		hash;
	unsigned int		offset = 0;
	int			dir_modified = 0;
	int			dot_state;
	unsigned int		rec_len;
	blk64_t			block_nr = db->blk;
	ext2_ino_t 		ino = db->ino;
	ext2_ino_t 		subdir_parent;
	__u16			links;
	struct check_dir_struct	*cd;
	char 			*buf;
	e2fsck_t		ctx;
	int			problem;
	struct ext2_dx_root_info *root;
	struct ext2_dx_countlimit *limit;
	static dict_t de_dict;
	struct problem_context	pctx;
	int	dups_found = 0;
	int	ret;

	cd = (struct check_dir_struct *) priv_data;
	buf = cd->buf;
	ctx = cd->ctx;

	if (ctx->flags & E2F_FLAG_SIGNAL_MASK || ctx->flags & E2F_FLAG_RESTART)
		return DIRENT_ABORT;

	if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max))
		return DIRENT_ABORT;

	/*
	 * Make sure the inode is still in use (could have been
	 * deleted in the duplicate/bad blocks pass.
	 */
	if (!(ext2fs_test_inode_bitmap2(ctx->inode_used_map, ino)))
		return 0;

	cd->pctx.ino = ino;
	cd->pctx.blk = block_nr;
	cd->pctx.blkcount = db->blockcnt;
	cd->pctx.ino2 = 0;
	cd->pctx.dirent = 0;
	cd->pctx.num = 0;

	if (db->blk == 0) {
		if (allocate_dir_block(ctx, db, buf, &cd->pctx))
			return 0;
		block_nr = db->blk;
	}

	if (db->blockcnt)
		dot_state = 2;
	else
		dot_state = 0;

	if (ctx->dirs_to_hash &&
	    ext2fs_u32_list_test(ctx->dirs_to_hash, ino))
		dups_found++;

#if 0
	printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
	       db->blockcnt, ino);
#endif

	ehandler_operation(_("reading directory block"));
	cd->pctx.errcode = ext2fs_read_dir_block3(fs, block_nr, buf, 0);
	ehandler_operation(0);
	if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
		cd->pctx.errcode = 0; /* We'll handle this ourselves */
	if (cd->pctx.errcode) {
		if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
			ctx->flags |= E2F_FLAG_ABORT;
			return DIRENT_ABORT;
		}
		memset(buf, 0, fs->blocksize);
	}
#ifdef ENABLE_HTREE
	dx_dir = e2fsck_get_dx_dir_info(ctx, ino);
	if (dx_dir && dx_dir->numblocks) {
		if (db->blockcnt >= dx_dir->numblocks) {
			if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK,
					&pctx)) {
				clear_htree(ctx, ino);
				dx_dir->numblocks = 0;
				dx_db = 0;
				goto out_htree;
			}
			fatal_error(ctx, _("Can not continue."));
		}
		dx_db = &dx_dir->dx_block[db->blockcnt];
		dx_db->type = DX_DIRBLOCK_LEAF;
		dx_db->phys = block_nr;
		dx_db->min_hash = ~0;
		dx_db->max_hash = 0;

		dirent = (struct ext2_dir_entry *) buf;
		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		limit = (struct ext2_dx_countlimit *) (buf+8);
		if (db->blockcnt == 0) {
			root = (struct ext2_dx_root_info *) (buf + 24);
			dx_db->type = DX_DIRBLOCK_ROOT;
			dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
			if ((root->reserved_zero ||
			     root->info_length < 8 ||
			     root->indirect_levels > 1) &&
			    fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) {
				clear_htree(ctx, ino);
				dx_dir->numblocks = 0;
				dx_db = 0;
			}
			dx_dir->hashversion = root->hash_version;
			if ((dx_dir->hashversion <= EXT2_HASH_TEA) &&
			    (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
				dx_dir->hashversion += 3;
			dx_dir->depth = root->indirect_levels + 1;
		} else if ((dirent->inode == 0) &&
			   (rec_len == fs->blocksize) &&
			   (dirent->name_len == 0) &&
			   (ext2fs_le16_to_cpu(limit->limit) ==
			    ((fs->blocksize-8) /
			     sizeof(struct ext2_dx_entry))))
			dx_db->type = DX_DIRBLOCK_NODE;
	}
out_htree:
#endif /* ENABLE_HTREE */

	dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp);
	prev = 0;
	do {
		int group;
		ext2_ino_t first_unused_inode;

		problem = 0;
		dirent = (struct ext2_dir_entry *) (buf + offset);
		(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		cd->pctx.dirent = dirent;
		cd->pctx.num = offset;
		if (((offset + rec_len) > fs->blocksize) ||
		    (rec_len < 12) ||
		    ((rec_len % 4) != 0) ||
		    (((dirent->name_len & (unsigned) 0xFF)+8) > rec_len)) {
			if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) {
				salvage_directory(fs, dirent, prev, &offset);
				dir_modified++;
				continue;
			} else
				goto abort_free_dict;
		}

		if (dot_state == 0) {
			if (check_dot(ctx, dirent, ino, &cd->pctx))
				dir_modified++;
		} else if (dot_state == 1) {
			ret = check_dotdot(ctx, dirent, ino, &cd->pctx);
			if (ret < 0)
				goto abort_free_dict;
			if (ret)
				dir_modified++;
		} else if (dirent->inode == ino) {
			problem = PR_2_LINK_DOT;
			if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			}
		}
		if (!dirent->inode)
			goto next;

		/*
		 * Make sure the inode listed is a legal one.
		 */
		if (((dirent->inode != EXT2_ROOT_INO) &&
		     (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
		    (dirent->inode > fs->super->s_inodes_count)) {
			problem = PR_2_BAD_INO;
		} else if (ctx->inode_bb_map &&
			   (ext2fs_test_inode_bitmap2(ctx->inode_bb_map,
						     dirent->inode))) {
			/*
			 * If the inode is in a bad block, offer to
			 * clear it.
			 */
			problem = PR_2_BB_INODE;
		} else if ((dot_state > 1) &&
			   ((dirent->name_len & 0xFF) == 1) &&
			   (dirent->name[0] == '.')) {
			/*
			 * If there's a '.' entry in anything other
			 * than the first directory entry, it's a
			 * duplicate entry that should be removed.
			 */
			problem = PR_2_DUP_DOT;
		} else if ((dot_state > 1) &&
			   ((dirent->name_len & 0xFF) == 2) &&
			   (dirent->name[0] == '.') &&
			   (dirent->name[1] == '.')) {
			/*
			 * If there's a '..' entry in anything other
			 * than the second directory entry, it's a
			 * duplicate entry that should be removed.
			 */
			problem = PR_2_DUP_DOT_DOT;
		} else if ((dot_state > 1) &&
			   (dirent->inode == EXT2_ROOT_INO)) {
			/*
			 * Don't allow links to the root directory.
			 * We check this specially to make sure we
			 * catch this error case even if the root
			 * directory hasn't been created yet.
			 */
			problem = PR_2_LINK_ROOT;
		} else if ((dot_state > 1) &&
			   (dirent->name_len & 0xFF) == 0) {
			/*
			 * Don't allow zero-length directory names.
			 */
			problem = PR_2_NULL_NAME;
		}

		if (problem) {
			if (fix_problem(ctx, problem, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		/*
		 * If the inode was marked as having bad fields in
		 * pass1, process it and offer to fix/clear it.
		 * (We wait until now so that we can display the
		 * pathname to the user.)
		 */
		if (ctx->inode_bad_map &&
		    ext2fs_test_inode_bitmap2(ctx->inode_bad_map,
					     dirent->inode)) {
			if (e2fsck_process_bad_inode(ctx, ino,
						     dirent->inode,
						     buf + fs->blocksize)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			}
			if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
				return DIRENT_ABORT;
		}

		group = ext2fs_group_of_ino(fs, dirent->inode);
		first_unused_inode = group * fs->super->s_inodes_per_group +
					1 + fs->super->s_inodes_per_group -
					ext2fs_bg_itable_unused(fs, group);
		cd->pctx.group = group;

		/*
		 * Check if the inode was missed out because
		 * _INODE_UNINIT flag was set or bg_itable_unused was
		 * incorrect.  If so, clear the _INODE_UNINIT flag and
		 * restart e2fsck.  In the future it would be nice if
		 * we could call a function in pass1.c that checks the
		 * newly visible inodes.
		 */
		if (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)) {
			pctx.num = dirent->inode;
			if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT,
					&cd->pctx)){
				ext2fs_bg_flags_clear(fs, group,
						      EXT2_BG_INODE_UNINIT);
				ext2fs_mark_super_dirty(fs);
				ctx->flags |= E2F_FLAG_RESTART_LATER;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		} else if (dirent->inode >= first_unused_inode) {
			pctx.num = dirent->inode;
			if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){
				ext2fs_bg_itable_unused_set(fs, group, 0);
				ext2fs_mark_super_dirty(fs);
				ctx->flags |= E2F_FLAG_RESTART_LATER;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		/* 
		 * Offer to clear unused inodes; if we are going to be
		 * restarting the scan due to bg_itable_unused being
		 * wrong, then don't clear any inodes to avoid zapping
		 * inodes that were skipped during pass1 due to an
		 * incorrect bg_itable_unused; we'll get any real
		 * problems after we restart.
		 */
		if (!(ctx->flags & E2F_FLAG_RESTART_LATER) &&
		    !(ext2fs_test_inode_bitmap2(ctx->inode_used_map,
						dirent->inode)))
			problem = PR_2_UNUSED_INODE;

		if (problem) {
			if (fix_problem(ctx, problem, &cd->pctx)) {
				dirent->inode = 0;
				dir_modified++;
				goto next;
			} else {
				ext2fs_unmark_valid(fs);
				if (problem == PR_2_BAD_INO)
					goto next;
			}
		}

		if (check_name(ctx, dirent, ino, &cd->pctx))
			dir_modified++;

		if (check_filetype(ctx, dirent, ino, &cd->pctx))
			dir_modified++;

#ifdef ENABLE_HTREE
		if (dx_db) {
			ext2fs_dirhash(dx_dir->hashversion, dirent->name,
				       (dirent->name_len & 0xFF),
				       fs->super->s_hash_seed, &hash, 0);
			if (hash < dx_db->min_hash)
				dx_db->min_hash = hash;
			if (hash > dx_db->max_hash)
				dx_db->max_hash = hash;
		}
#endif

		/*
		 * If this is a directory, then mark its parent in its
		 * dir_info structure.  If the parent field is already
		 * filled in, then this directory has more than one
		 * hard link.  We assume the first link is correct,
		 * and ask the user if he/she wants to clear this one.
		 */
		if ((dot_state > 1) &&
		    (ext2fs_test_inode_bitmap2(ctx->inode_dir_map,
					      dirent->inode))) {
			if (e2fsck_dir_info_get_parent(ctx, dirent->inode,
						       &subdir_parent)) {
				cd->pctx.ino = dirent->inode;
				fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
				goto abort_free_dict;
			}
			if (subdir_parent) {
				cd->pctx.ino2 = subdir_parent;
				if (fix_problem(ctx, PR_2_LINK_DIR,
						&cd->pctx)) {
					dirent->inode = 0;
					dir_modified++;
					goto next;
				}
				cd->pctx.ino2 = 0;
			} else {
				(void) e2fsck_dir_info_set_parent(ctx,
						  dirent->inode, ino);
			}
		}

		if (dups_found) {
			;
		} else if (dict_lookup(&de_dict, dirent)) {
			clear_problem_context(&pctx);
			pctx.ino = ino;
			pctx.dirent = dirent;
			fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx);
			if (!ctx->dirs_to_hash)
				ext2fs_u32_list_create(&ctx->dirs_to_hash, 50);
			if (ctx->dirs_to_hash)
				ext2fs_u32_list_add(ctx->dirs_to_hash, ino);
			dups_found++;
		} else
			dict_alloc_insert(&de_dict, dirent, dirent);

		ext2fs_icount_increment(ctx->inode_count, dirent->inode,
					&links);
		if (links > 1)
			ctx->fs_links_count++;
		ctx->fs_total_count++;
	next:
		prev = dirent;
		if (dir_modified)
			(void) ext2fs_get_rec_len(fs, dirent, &rec_len);
		offset += rec_len;
		dot_state++;
	} while (offset < fs->blocksize);
#if 0
	printf("\n");
#endif
#ifdef ENABLE_HTREE
	if (dx_db) {
#ifdef DX_DEBUG
		printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n",
		       db->blockcnt, dx_db->type,
		       dx_db->min_hash, dx_db->max_hash);
#endif
		cd->pctx.dir = cd->pctx.ino;
		if ((dx_db->type == DX_DIRBLOCK_ROOT) ||
		    (dx_db->type == DX_DIRBLOCK_NODE))
			parse_int_node(fs, db, cd, dx_dir, buf);
	}
#endif /* ENABLE_HTREE */
	if (offset != fs->blocksize) {
		cd->pctx.num = rec_len - fs->blocksize + offset;
		if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
			dirent->rec_len = cd->pctx.num;
			dir_modified++;
		}
	}
	if (dir_modified) {
		cd->pctx.errcode = ext2fs_write_dir_block(fs, block_nr, buf);
		if (cd->pctx.errcode) {
			if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
					 &cd->pctx))
				goto abort_free_dict;
		}
		ext2fs_mark_changed(fs);
	}
	dict_free_nodes(&de_dict);
	return 0;
abort_free_dict:
	ctx->flags |= E2F_FLAG_ABORT;
	dict_free_nodes(&de_dict);
	return DIRENT_ABORT;
}
Exemple #22
0
errcode_t ext2fs_initialize(const char *name, int flags,
                            struct ext2_super_block *param,
                            io_manager manager, ext2_filsys *ret_fs)
{
    ext2_filsys	fs;
    errcode_t	retval;
    struct ext2_super_block *super;
    int		frags_per_block;
    unsigned int	rem;
    unsigned int	overhead = 0;
    unsigned int	ipg;
    dgrp_t		i;
    blk_t		numblocks;
    int		rsv_gdt;
    int		io_flags;
    char		*buf;
    char		c;

    if (!param || !param->s_blocks_count)
        return EXT2_ET_INVALID_ARGUMENT;

    retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
    if (retval)
        return retval;

    memset(fs, 0, sizeof(struct struct_ext2_filsys));
    fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
    fs->flags = flags | EXT2_FLAG_RW;
    fs->umask = 022;
#ifdef WORDS_BIGENDIAN
    fs->flags |= EXT2_FLAG_SWAP_BYTES;
#endif
    io_flags = IO_FLAG_RW;
    if (flags & EXT2_FLAG_EXCLUSIVE)
        io_flags |= IO_FLAG_EXCLUSIVE;
    retval = manager->open(name, io_flags, &fs->io);
    if (retval)
        goto cleanup;
    fs->image_io = fs->io;
    fs->io->app_data = fs;
    retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
    if (retval)
        goto cleanup;

    strcpy(fs->device_name, name);
    retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &super);
    if (retval)
        goto cleanup;
    fs->super = super;

    memset(super, 0, SUPERBLOCK_SIZE);

#define set_field(field, default) (super->field = param->field ? \
				   param->field : (default))

    super->s_magic = EXT2_SUPER_MAGIC;
    super->s_state = EXT2_VALID_FS;

    set_field(s_log_block_size, 0);	/* default blocksize: 1024 bytes */
    set_field(s_log_frag_size, 0); /* default fragsize: 1024 bytes */
    set_field(s_first_data_block, super->s_log_block_size ? 0 : 1);
    set_field(s_max_mnt_count, EXT2_DFL_MAX_MNT_COUNT);
    set_field(s_errors, EXT2_ERRORS_DEFAULT);
    set_field(s_feature_compat, 0);
    set_field(s_feature_incompat, 0);
    set_field(s_feature_ro_compat, 0);
    set_field(s_first_meta_bg, 0);
    if (super->s_feature_incompat & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) {
        retval = EXT2_ET_UNSUPP_FEATURE;
        goto cleanup;
    }
    if (super->s_feature_ro_compat & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP) {
        retval = EXT2_ET_RO_UNSUPP_FEATURE;
        goto cleanup;
    }

    set_field(s_rev_level, EXT2_GOOD_OLD_REV);
    if (super->s_rev_level >= EXT2_DYNAMIC_REV) {
        set_field(s_first_ino, EXT2_GOOD_OLD_FIRST_INO);
        set_field(s_inode_size, EXT2_GOOD_OLD_INODE_SIZE);
    }

    set_field(s_checkinterval, EXT2_DFL_CHECKINTERVAL);
    super->s_mkfs_time = super->s_lastcheck = fs->now ? fs->now : time(NULL);

    super->s_creator_os = CREATOR_OS;

    fs->blocksize = EXT2_BLOCK_SIZE(super);
    fs->fragsize = EXT2_FRAG_SIZE(super);
    frags_per_block = fs->blocksize / fs->fragsize;

    /* default: (fs->blocksize*8) blocks/group, up to 2^16 (GDT limit) */
    set_field(s_blocks_per_group, fs->blocksize * 8);
    if (super->s_blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(super))
        super->s_blocks_per_group = EXT2_MAX_BLOCKS_PER_GROUP(super);
    super->s_frags_per_group = super->s_blocks_per_group * frags_per_block;

    super->s_blocks_count = param->s_blocks_count;
    super->s_r_blocks_count = param->s_r_blocks_count;
    if (super->s_r_blocks_count >= param->s_blocks_count) {
        retval = EXT2_ET_INVALID_ARGUMENT;
        goto cleanup;
    }

    /*
     * If we're creating an external journal device, we don't need
     * to bother with the rest.
     */
    if (super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
        fs->group_desc_count = 0;
        ext2fs_mark_super_dirty(fs);
        *ret_fs = fs;
        return 0;
    }

retry:
    fs->group_desc_count = ext2fs_div_ceil(super->s_blocks_count -
                                           super->s_first_data_block,
                                           EXT2_BLOCKS_PER_GROUP(super));
    if (fs->group_desc_count == 0) {
        retval = EXT2_ET_TOOSMALL;
        goto cleanup;
    }
    fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
                                      EXT2_DESC_PER_BLOCK(super));

    i = fs->blocksize >= 4096 ? 1 : 4096 / fs->blocksize;
    set_field(s_inodes_count, super->s_blocks_count / i);

    /*
     * Make sure we have at least EXT2_FIRST_INO + 1 inodes, so
     * that we have enough inodes for the filesystem(!)
     */
    if (super->s_inodes_count < EXT2_FIRST_INODE(super)+1)
        super->s_inodes_count = EXT2_FIRST_INODE(super)+1;

    /*
     * There should be at least as many inodes as the user
     * requested.  Figure out how many inodes per group that
     * should be.  But make sure that we don't allocate more than
     * one bitmap's worth of inodes each group.
     */
    ipg = ext2fs_div_ceil(super->s_inodes_count, fs->group_desc_count);
    if (ipg > fs->blocksize * 8) {
        if (super->s_blocks_per_group >= 256) {
            /* Try again with slightly different parameters */
            super->s_blocks_per_group -= 8;
            super->s_blocks_count = param->s_blocks_count;
            super->s_frags_per_group = super->s_blocks_per_group *
                                       frags_per_block;
            goto retry;
        } else
            return EXT2_ET_TOO_MANY_INODES;
    }

    if (ipg > (unsigned) EXT2_MAX_INODES_PER_GROUP(super))
        ipg = EXT2_MAX_INODES_PER_GROUP(super);

ipg_retry:
    super->s_inodes_per_group = ipg;

    /*
     * Make sure the number of inodes per group completely fills
     * the inode table blocks in the descriptor.  If not, add some
     * additional inodes/group.  Waste not, want not...
     */
    fs->inode_blocks_per_group = (((super->s_inodes_per_group *
                                    EXT2_INODE_SIZE(super)) +
                                   EXT2_BLOCK_SIZE(super) - 1) /
                                  EXT2_BLOCK_SIZE(super));
    super->s_inodes_per_group = ((fs->inode_blocks_per_group *
                                  EXT2_BLOCK_SIZE(super)) /
                                 EXT2_INODE_SIZE(super));
    /*
     * Finally, make sure the number of inodes per group is a
     * multiple of 8.  This is needed to simplify the bitmap
     * splicing code.
     */
    super->s_inodes_per_group &= ~7;
    fs->inode_blocks_per_group = (((super->s_inodes_per_group *
                                    EXT2_INODE_SIZE(super)) +
                                   EXT2_BLOCK_SIZE(super) - 1) /
                                  EXT2_BLOCK_SIZE(super));

    /*
     * adjust inode count to reflect the adjusted inodes_per_group
     */
    if ((__u64)super->s_inodes_per_group * fs->group_desc_count > ~0U) {
        ipg--;
        goto ipg_retry;
    }
    super->s_inodes_count = super->s_inodes_per_group *
                            fs->group_desc_count;
    super->s_free_inodes_count = super->s_inodes_count;

    /*
     * check the number of reserved group descriptor table blocks
     */
    if (super->s_feature_compat & EXT2_FEATURE_COMPAT_RESIZE_INODE)
        rsv_gdt = calc_reserved_gdt_blocks(fs);
    else
        rsv_gdt = 0;
    set_field(s_reserved_gdt_blocks, rsv_gdt);
    if (super->s_reserved_gdt_blocks > EXT2_ADDR_PER_BLOCK(super)) {
        retval = EXT2_ET_RES_GDT_BLOCKS;
        goto cleanup;
    }

    /*
     * Overhead is the number of bookkeeping blocks per group.  It
     * includes the superblock backup, the group descriptor
     * backups, the inode bitmap, the block bitmap, and the inode
     * table.
     */

    overhead = (int) (2 + fs->inode_blocks_per_group);

    if (ext2fs_bg_has_super(fs, fs->group_desc_count - 1))
        overhead += 1 + fs->desc_blocks + super->s_reserved_gdt_blocks;

    /* This can only happen if the user requested too many inodes */
    if (overhead > super->s_blocks_per_group)
        return EXT2_ET_TOO_MANY_INODES;

    /*
     * See if the last group is big enough to support the
     * necessary data structures.  If not, we need to get rid of
     * it.
     */
    rem = ((super->s_blocks_count - super->s_first_data_block) %
           super->s_blocks_per_group);
    if ((fs->group_desc_count == 1) && rem && (rem < overhead))
        return EXT2_ET_TOOSMALL;
    if (rem && (rem < overhead+50)) {
        super->s_blocks_count -= rem;
        goto retry;
    }

    /*
     * At this point we know how big the filesystem will be.  So
     * we can do any and all allocations that depend on the block
     * count.
     */

    retval = ext2fs_get_mem(strlen(fs->device_name) + 80, &buf);
    if (retval)
        goto cleanup;

    sprintf(buf, "block bitmap for %s", fs->device_name);
    retval = ext2fs_allocate_block_bitmap(fs, buf, &fs->block_map);
    if (retval)
        goto cleanup;

    sprintf(buf, "inode bitmap for %s", fs->device_name);
    retval = ext2fs_allocate_inode_bitmap(fs, buf, &fs->inode_map);
    if (retval)
        goto cleanup;

    ext2fs_free_mem(&buf);

    retval = ext2fs_get_mem((size_t) fs->desc_blocks * fs->blocksize,
                            &fs->group_desc);
    if (retval)
        goto cleanup;

    memset(fs->group_desc, 0, (size_t) fs->desc_blocks * fs->blocksize);

    /*
     * Reserve the superblock and group descriptors for each
     * group, and fill in the correct group statistics for group.
     * Note that although the block bitmap, inode bitmap, and
     * inode table have not been allocated (and in fact won't be
     * by this routine), they are accounted for nevertheless.
     */
    super->s_free_blocks_count = 0;
    for (i = 0; i < fs->group_desc_count; i++) {
        numblocks = ext2fs_reserve_super_and_bgd(fs, i, fs->block_map);

        super->s_free_blocks_count += numblocks;
        fs->group_desc[i].bg_free_blocks_count = numblocks;
        fs->group_desc[i].bg_free_inodes_count =
            fs->super->s_inodes_per_group;
        fs->group_desc[i].bg_used_dirs_count = 0;
    }

    c = (char) 255;
    if (((int) c) == -1) {
        super->s_flags |= EXT2_FLAGS_SIGNED_HASH;
    } else {
        super->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
    }

    ext2fs_mark_super_dirty(fs);
    ext2fs_mark_bb_dirty(fs);
    ext2fs_mark_ib_dirty(fs);

    io_channel_set_blksize(fs->io, fs->blocksize);

    *ret_fs = fs;
    return 0;
cleanup:
    ext2fs_free(fs);
    return retval;
}
Exemple #23
0
/*
 * Remove an external journal from the filesystem
 */
static void remove_journal_device(ext2_filsys fs)
{
	char		*journal_path;
	ext2_filsys	jfs;
	char		buf[1024];
	journal_superblock_t	*jsb;
	int		i, nr_users;
	errcode_t	retval;
	int		commit_remove_journal = 0;
	io_manager	io_ptr;

	if (f_flag)
		commit_remove_journal = 1; /* force removal even if error */

	uuid_unparse(fs->super->s_journal_uuid, buf);
	journal_path = blkid_get_devname(NULL, "UUID", buf);

	if (!journal_path) {
		journal_path =
			ext2fs_find_block_device(fs->super->s_journal_dev);
		if (!journal_path)
			return;
	}

	io_ptr = unix_io_manager;
	retval = ext2fs_open(journal_path, EXT2_FLAG_RW|
			     EXT2_FLAG_JOURNAL_DEV_OK, 0,
			     fs->blocksize, io_ptr, &jfs);
	if (retval) {
		bb_error_msg("Failed to open external journal");
		goto no_valid_journal;
	}
	if (!(jfs->super->s_feature_incompat & EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
		bb_error_msg("%s is not a journal device", journal_path);
		goto no_valid_journal;
	}

	/* Get the journal superblock */
	if ((retval = io_channel_read_blk(jfs->io, 1, -1024, buf))) {
		bb_error_msg("Failed to read journal superblock");
		goto no_valid_journal;
	}

	jsb = (journal_superblock_t *) buf;
	if ((jsb->s_header.h_magic != (unsigned) ntohl(JFS_MAGIC_NUMBER)) ||
	    (jsb->s_header.h_blocktype != (unsigned) ntohl(JFS_SUPERBLOCK_V2))) {
		bb_error_msg("Journal superblock not found!");
		goto no_valid_journal;
	}

	/* Find the filesystem UUID */
	nr_users = ntohl(jsb->s_nr_users);
	for (i=0; i < nr_users; i++) {
		if (memcmp(fs->super->s_uuid,
			   &jsb->s_users[i*16], 16) == 0)
			break;
	}
	if (i >= nr_users) {
		bb_error_msg("Filesystem's UUID not found on journal device");
		commit_remove_journal = 1;
		goto no_valid_journal;
	}
	nr_users--;
	for (i=0; i < nr_users; i++)
		memcpy(&jsb->s_users[i*16], &jsb->s_users[(i+1)*16], 16);
	jsb->s_nr_users = htonl(nr_users);

	/* Write back the journal superblock */
	if ((retval = io_channel_write_blk(jfs->io, 1, -1024, buf))) {
		bb_error_msg("Failed to write journal superblock");
		goto no_valid_journal;
	}

	commit_remove_journal = 1;

no_valid_journal:
	if (commit_remove_journal == 0)
		bb_error_msg_and_die("Journal NOT removed");
	fs->super->s_journal_dev = 0;
	uuid_clear(fs->super->s_journal_uuid);
	ext2fs_mark_super_dirty(fs);
	puts("Journal removed");
	free(journal_path);
}
Exemple #24
0
void e2fsck_move_ext3_journal(e2fsck_t ctx)
{
	struct ext2_super_block *sb = ctx->fs->super;
	struct problem_context	pctx;
	struct ext2_inode 	inode;
	ext2_filsys		fs = ctx->fs;
	ext2_ino_t		ino;
	errcode_t		retval;
	const char * const *	cpp;
	dgrp_t			group;
	int			mount_flags;

	clear_problem_context(&pctx);

	/*
	 * If the filesystem is opened read-only, or there is no
	 * journal, then do nothing.
	 */
	if ((ctx->options & E2F_OPT_READONLY) ||
	    (sb->s_journal_inum == 0) ||
	    !(sb->s_feature_compat & EXT3_FEATURE_COMPAT_HAS_JOURNAL))
		return;

	/*
	 * Read in the journal inode
	 */
	if (ext2fs_read_inode(fs, sb->s_journal_inum, &inode) != 0)
		return;

	/*
	 * If it's necessary to backup the journal inode, do so.
	 */
	if ((sb->s_jnl_backup_type == 0) ||
	    ((sb->s_jnl_backup_type == EXT3_JNL_BACKUP_BLOCKS) &&
	     memcmp(inode.i_block, sb->s_jnl_blocks, EXT2_N_BLOCKS*4))) {
		if (fix_problem(ctx, PR_0_BACKUP_JNL, &pctx)) {
			memcpy(sb->s_jnl_blocks, inode.i_block,
			       EXT2_N_BLOCKS*4);
			sb->s_jnl_blocks[15] = inode.i_size_high;
			sb->s_jnl_blocks[16] = inode.i_size;
			sb->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
			ext2fs_mark_super_dirty(fs);
			fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
		}
	}

	/*
	 * If the journal is already the hidden inode, then do nothing
	 */
	if (sb->s_journal_inum == EXT2_JOURNAL_INO)
		return;

	/*
	 * The journal inode had better have only one link and not be readable.
	 */
	if (inode.i_links_count != 1)
		return;

	/*
	 * If the filesystem is mounted, or we can't tell whether
	 * or not it's mounted, do nothing.
	 */
	retval = ext2fs_check_if_mounted(ctx->filesystem_name, &mount_flags);
	if (retval || (mount_flags & EXT2_MF_MOUNTED))
		return;

	/*
	 * If we can't find the name of the journal inode, then do
	 * nothing.
	 */
	for (cpp = journal_names; *cpp; cpp++) {
		retval = ext2fs_lookup(fs, EXT2_ROOT_INO, *cpp,
				       strlen(*cpp), 0, &ino);
		if ((retval == 0) && (ino == sb->s_journal_inum))
			break;
	}
	if (*cpp == 0)
		return;

	/* We need the inode bitmap to be loaded */
	retval = ext2fs_read_bitmaps(fs);
	if (retval)
		return;

	pctx.str = *cpp;
	if (!fix_problem(ctx, PR_0_MOVE_JOURNAL, &pctx))
		return;

	/*
	 * OK, we've done all the checks, let's actually move the
	 * journal inode.  Errors at this point mean we need to force
	 * an ext2 filesystem check.
	 */
	if ((retval = ext2fs_unlink(fs, EXT2_ROOT_INO, *cpp, ino, 0)) != 0)
		goto err_out;
	if ((retval = ext2fs_write_inode(fs, EXT2_JOURNAL_INO, &inode)) != 0)
		goto err_out;
	sb->s_journal_inum = EXT2_JOURNAL_INO;
	ext2fs_mark_super_dirty(fs);
	fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
	inode.i_links_count = 0;
	inode.i_dtime = ctx->now;
	if ((retval = ext2fs_write_inode(fs, ino, &inode)) != 0)
		goto err_out;

	group = ext2fs_group_of_ino(fs, ino);
	ext2fs_unmark_inode_bitmap2(fs->inode_map, ino);
	ext2fs_mark_ib_dirty(fs);
	ext2fs_bg_free_inodes_count_set(fs, group, ext2fs_bg_free_inodes_count(fs, group) + 1);
	ext2fs_group_desc_csum_set(fs, group);
	fs->super->s_free_inodes_count++;
	return;

err_out:
	pctx.errcode = retval;
	fix_problem(ctx, PR_0_ERR_MOVE_JOURNAL, &pctx);
	fs->super->s_state &= ~EXT2_VALID_FS;
	ext2fs_mark_super_dirty(fs);
	return;
}
Exemple #25
0
/*
 * This function creates a journal using direct I/O routines.
 */
static errcode_t write_journal_inode(ext2_filsys fs, ext2_ino_t journal_ino,
				     blk_t num_blocks, blk64_t goal, int flags)
{
	char			*buf;
	errcode_t		retval;
	struct ext2_inode	inode;
	unsigned long long	inode_size;
	int			falloc_flags = EXT2_FALLOCATE_FORCE_INIT;
	blk64_t			zblk;

	if ((retval = ext2fs_create_journal_superblock(fs, num_blocks, flags,
						       &buf)))
		return retval;

	if ((retval = ext2fs_read_bitmaps(fs)))
		goto out2;

	if ((retval = ext2fs_read_inode(fs, journal_ino, &inode)))
		goto out2;

	if (inode.i_blocks > 0) {
		retval = EEXIST;
		goto out2;
	}

	if (goal == ~0ULL)
		goal = get_midpoint_journal_block(fs);

	if (ext2fs_has_feature_extents(fs->super))
		inode.i_flags |= EXT4_EXTENTS_FL;

	if (!(flags & EXT2_MKJOURNAL_LAZYINIT))
		falloc_flags |= EXT2_FALLOCATE_ZERO_BLOCKS;

	inode_size = (unsigned long long)fs->blocksize * num_blocks;
	inode.i_mtime = inode.i_ctime = fs->now ? fs->now : time(0);
	inode.i_links_count = 1;
	inode.i_mode = LINUX_S_IFREG | 0600;
	retval = ext2fs_inode_size_set(fs, &inode, inode_size);
	if (retval)
		goto out2;

	retval = ext2fs_fallocate(fs, falloc_flags, journal_ino,
				  &inode, goal, 0, num_blocks);
	if (retval)
		goto out2;

	if ((retval = ext2fs_write_new_inode(fs, journal_ino, &inode)))
		goto out2;

	retval = ext2fs_bmap2(fs, journal_ino, &inode, NULL, 0, 0, NULL, &zblk);
	if (retval)
		goto out2;

	retval = io_channel_write_blk64(fs->io, zblk, 1, buf);
	if (retval)
		goto out2;

	memcpy(fs->super->s_jnl_blocks, inode.i_block, EXT2_N_BLOCKS*4);
	fs->super->s_jnl_blocks[15] = inode.i_size_high;
	fs->super->s_jnl_blocks[16] = inode.i_size;
	fs->super->s_jnl_backup_type = EXT3_JNL_BACKUP_BLOCKS;
	ext2fs_mark_super_dirty(fs);

out2:
	ext2fs_free_mem(&buf);
	return retval;
}
Exemple #26
0
/*
 *  Note: if superblock is non-zero, block-size must also be non-zero.
 * 	Superblock and block_size can be zero to use the default size.
 *
 * Valid flags for ext2fs_open()
 *
 * 	EXT2_FLAG_RW	- Open the filesystem for read/write.
 * 	EXT2_FLAG_FORCE - Open the filesystem even if some of the
 *				features aren't supported.
 *	EXT2_FLAG_JOURNAL_DEV_OK - Open an ext3 journal device
 *	EXT2_FLAG_SKIP_MMP - Open without multi-mount protection check.
 *	EXT2_FLAG_64BITS - Allow 64-bit bitfields (needed for large
 *				filesystems)
 */
errcode_t ext2fs_open2(const char *name, const char *io_options,
		       int flags, int superblock,
		       unsigned int block_size, io_channel io,
		       ext2_filsys *ret_fs)
{
	ext2_filsys	fs;
	io_manager manager = io->manager;
	errcode_t	retval;
	unsigned long	i, first_meta_bg;
	__u32		features;
	unsigned int	groups_per_block, blocks_per_group, io_flags;
	blk64_t		group_block, blk;
	char		*dest, *cp;
#ifdef WORDS_BIGENDIAN
	struct ext2_group_desc *gdp;
	int		j;
#endif

	EXT2_CHECK_MAGIC(manager, EXT2_ET_MAGIC_IO_MANAGER);

	retval = ext2fs_get_mem(sizeof(struct struct_ext2_filsys), &fs);
	if (retval)
		return retval;

	memset(fs, 0, sizeof(struct struct_ext2_filsys));
	fs->magic = EXT2_ET_MAGIC_EXT2FS_FILSYS;
	fs->io = io;
	fs->flags = flags;
	/* don't overwrite sb backups unless flag is explicitly cleared */
	fs->flags |= EXT2_FLAG_MASTER_SB_ONLY;
	fs->umask = 022;
	retval = ext2fs_get_mem(strlen(name)+1, &fs->device_name);
	if (retval)
		goto cleanup;
	strcpy(fs->device_name, name);
	cp = strchr(fs->device_name, '?');
	if (!io_options && cp) {
		*cp++ = 0;
		io_options = cp;
	}

	io_flags = 0;
	if (flags & EXT2_FLAG_RW)
		io_flags |= IO_FLAG_RW;
	if (flags & EXT2_FLAG_EXCLUSIVE)
		io_flags |= IO_FLAG_EXCLUSIVE;
	if (flags & EXT2_FLAG_DIRECT_IO)
		io_flags |= IO_FLAG_DIRECT_IO;
	retval = manager->open(fs->device_name, io_flags, &fs->io);
	if (retval)
		goto cleanup;
	if (io_options &&
	    (retval = io_channel_set_options(fs->io, io_options)))
		goto cleanup;
	fs->image_io = fs->io;
	fs->io->app_data = fs;
	retval = io_channel_alloc_buf(fs->io, -SUPERBLOCK_SIZE, &fs->super);
	if (retval)
		goto cleanup;
	if (flags & EXT2_FLAG_IMAGE_FILE) {
		retval = ext2fs_get_mem(sizeof(struct ext2_image_hdr),
					&fs->image_header);
		if (retval)
			goto cleanup;
		retval = io_channel_read_blk(fs->io, 0,
					     -(int)sizeof(struct ext2_image_hdr),
					     fs->image_header);
		if (retval)
			goto cleanup;
		if (fs->image_header->magic_number != EXT2_ET_MAGIC_E2IMAGE)
			return EXT2_ET_MAGIC_E2IMAGE;
		superblock = 1;
		block_size = fs->image_header->fs_blocksize;
	}

	/*
	 * If the user specifies a specific block # for the
	 * superblock, then he/she must also specify the block size!
	 * Otherwise, read the master superblock located at offset
	 * SUPERBLOCK_OFFSET from the start of the partition.
	 *
	 * Note: we only save a backup copy of the superblock if we
	 * are reading the superblock from the primary superblock location.
	 */
	if (superblock) {
		if (!block_size) {
			retval = EXT2_ET_INVALID_ARGUMENT;
			goto cleanup;
		}
		io_channel_set_blksize(fs->io, block_size);
		group_block = superblock;
		fs->orig_super = 0;
	} else {
		io_channel_set_blksize(fs->io, SUPERBLOCK_OFFSET);
		superblock = 1;
		group_block = 0;
		retval = ext2fs_get_mem(SUPERBLOCK_SIZE, &fs->orig_super);
		if (retval)
			goto cleanup;
	}
	retval = io_channel_read_blk(fs->io, superblock, -SUPERBLOCK_SIZE,
				     fs->super);
	if (retval)
		goto cleanup;
	if (fs->orig_super)
		memcpy(fs->orig_super, fs->super, SUPERBLOCK_SIZE);

#ifdef WORDS_BIGENDIAN
	fs->flags |= EXT2_FLAG_SWAP_BYTES;
	ext2fs_swap_super(fs->super);
#else
	if (fs->flags & EXT2_FLAG_SWAP_BYTES) {
		retval = EXT2_ET_UNIMPLEMENTED;
		goto cleanup;
	}
#endif

	if (fs->super->s_magic != EXT2_SUPER_MAGIC) {
		retval = EXT2_ET_BAD_MAGIC;
		goto cleanup;
	}
	if (fs->super->s_rev_level > EXT2_LIB_CURRENT_REV) {
		retval = EXT2_ET_REV_TOO_HIGH;
		goto cleanup;
	}

	/*
	 * Check for feature set incompatibility
	 */
	if (!(flags & EXT2_FLAG_FORCE)) {
		features = fs->super->s_feature_incompat;
#ifdef EXT2_LIB_SOFTSUPP_INCOMPAT
		if (flags & EXT2_FLAG_SOFTSUPP_FEATURES)
			features &= ~EXT2_LIB_SOFTSUPP_INCOMPAT;
#endif
		if (features & ~EXT2_LIB_FEATURE_INCOMPAT_SUPP) {
			retval = EXT2_ET_UNSUPP_FEATURE;
			goto cleanup;
		}

		features = fs->super->s_feature_ro_compat;
#ifdef EXT2_LIB_SOFTSUPP_RO_COMPAT
		if (flags & EXT2_FLAG_SOFTSUPP_FEATURES)
			features &= ~EXT2_LIB_SOFTSUPP_RO_COMPAT;
#endif
		if ((flags & EXT2_FLAG_RW) &&
		    (features & ~EXT2_LIB_FEATURE_RO_COMPAT_SUPP)) {
			retval = EXT2_ET_RO_UNSUPP_FEATURE;
			goto cleanup;
		}

		if (!(flags & EXT2_FLAG_JOURNAL_DEV_OK) &&
		    (fs->super->s_feature_incompat &
		     EXT3_FEATURE_INCOMPAT_JOURNAL_DEV)) {
			retval = EXT2_ET_UNSUPP_FEATURE;
			goto cleanup;
		}
	}

	if ((fs->super->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
	    EXT2_MAX_BLOCK_LOG_SIZE) {
		retval = EXT2_ET_CORRUPT_SUPERBLOCK;
		goto cleanup;
	}
	if (!EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
					EXT4_FEATURE_RO_COMPAT_BIGALLOC) &&
	    (fs->super->s_log_block_size != fs->super->s_log_cluster_size)) {
		retval = EXT2_ET_CORRUPT_SUPERBLOCK;
		goto cleanup;
	}
	fs->fragsize = fs->blocksize = EXT2_BLOCK_SIZE(fs->super);
	if (EXT2_INODE_SIZE(fs->super) < EXT2_GOOD_OLD_INODE_SIZE) {
		retval = EXT2_ET_CORRUPT_SUPERBLOCK;
		goto cleanup;
	}
	fs->cluster_ratio_bits = fs->super->s_log_cluster_size -
		fs->super->s_log_block_size;
	if (EXT2_BLOCKS_PER_GROUP(fs->super) !=
	    EXT2_CLUSTERS_PER_GROUP(fs->super) << fs->cluster_ratio_bits) {
		retval = EXT2_ET_CORRUPT_SUPERBLOCK;
		goto cleanup;
	}
	fs->inode_blocks_per_group = ((EXT2_INODES_PER_GROUP(fs->super) *
				       EXT2_INODE_SIZE(fs->super) +
				       EXT2_BLOCK_SIZE(fs->super) - 1) /
				      EXT2_BLOCK_SIZE(fs->super));
	if (block_size) {
		if (block_size != fs->blocksize) {
			retval = EXT2_ET_UNEXPECTED_BLOCK_SIZE;
			goto cleanup;
		}
	}
	/*
	 * Set the blocksize to the filesystem's blocksize.
	 */
	io_channel_set_blksize(fs->io, fs->blocksize);

	/*
	 * If this is an external journal device, don't try to read
	 * the group descriptors, because they're not there.
	 */
	if (fs->super->s_feature_incompat &
	    EXT3_FEATURE_INCOMPAT_JOURNAL_DEV) {
		fs->group_desc_count = 0;
		*ret_fs = fs;
		return 0;
	}

	if (EXT2_INODES_PER_GROUP(fs->super) == 0) {
		retval = EXT2_ET_CORRUPT_SUPERBLOCK;
		goto cleanup;
	}

	/*
	 * Read group descriptors
	 */
	blocks_per_group = EXT2_BLOCKS_PER_GROUP(fs->super);
	if (blocks_per_group == 0 ||
	    blocks_per_group > EXT2_MAX_BLOCKS_PER_GROUP(fs->super) ||
	    fs->inode_blocks_per_group > EXT2_MAX_INODES_PER_GROUP(fs->super) ||
           EXT2_DESC_PER_BLOCK(fs->super) == 0 ||
           fs->super->s_first_data_block >= ext2fs_blocks_count(fs->super)) {
		retval = EXT2_ET_CORRUPT_SUPERBLOCK;
		goto cleanup;
	}
	fs->group_desc_count = ext2fs_div64_ceil(ext2fs_blocks_count(fs->super) -
						 fs->super->s_first_data_block,
						 blocks_per_group);
	if (fs->group_desc_count * EXT2_INODES_PER_GROUP(fs->super) !=
	    fs->super->s_inodes_count) {
		retval = EXT2_ET_CORRUPT_SUPERBLOCK;
		goto cleanup;
	}
	fs->desc_blocks = ext2fs_div_ceil(fs->group_desc_count,
					  EXT2_DESC_PER_BLOCK(fs->super));
	retval = ext2fs_get_array(fs->desc_blocks, fs->blocksize,
				&fs->group_desc);
	if (retval)
		goto cleanup;
	if (!group_block)
		group_block = fs->super->s_first_data_block;
	if (group_block == 0 && fs->blocksize == 1024)
		group_block = 1; /* Deal with 1024 blocksize && bigalloc */
	dest = (char *) fs->group_desc;
	groups_per_block = EXT2_DESC_PER_BLOCK(fs->super);
	if (fs->super->s_feature_incompat & EXT2_FEATURE_INCOMPAT_META_BG)
		first_meta_bg = fs->super->s_first_meta_bg;
	else
		first_meta_bg = fs->desc_blocks;
	if (first_meta_bg) {
		retval = io_channel_read_blk(fs->io, group_block+1,
					     first_meta_bg, dest);
		if (retval)
			goto cleanup;
#ifdef WORDS_BIGENDIAN
		gdp = (struct ext2_group_desc *) dest;
		for (j=0; j < groups_per_block*first_meta_bg; j++) {
			gdp = ext2fs_group_desc(fs, fs->group_desc, j);
			ext2fs_swap_group_desc2(fs, gdp);
		}
#endif
		dest += fs->blocksize*first_meta_bg;
	}
	for (i=first_meta_bg ; i < fs->desc_blocks; i++) {
		blk = ext2fs_descriptor_block_loc2(fs, group_block, i);
		retval = io_channel_read_blk64(fs->io, blk, 1, dest);
		if (retval)
			goto cleanup;
#ifdef WORDS_BIGENDIAN
		for (j=0; j < groups_per_block; j++) {
			gdp = ext2fs_group_desc(fs, fs->group_desc,
						i * groups_per_block + j);
			ext2fs_swap_group_desc2(fs, gdp);
		}
#endif
		dest += fs->blocksize;
	}

	fs->stride = fs->super->s_raid_stride;

	/*
	 * If recovery is from backup superblock, Clear _UNININT flags &
	 * reset bg_itable_unused to zero
	 */
	if (superblock > 1 && EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
					EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
		dgrp_t group;

		for (group = 0; group < fs->group_desc_count; group++) {
			ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT);
			ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT);
			ext2fs_bg_itable_unused_set(fs, group, 0);
			/* The checksum will be reset later, but fix it here
			 * anyway to avoid printing a lot of spurious errors. */
			ext2fs_group_desc_csum_set(fs, group);
		}
		if (fs->flags & EXT2_FLAG_RW)
			ext2fs_mark_super_dirty(fs);
	}

	fs->flags &= ~EXT2_FLAG_NOFREE_ON_ERROR;
	*ret_fs = fs;

	if ((fs->super->s_feature_incompat & EXT4_FEATURE_INCOMPAT_MMP) &&
	    !(flags & EXT2_FLAG_SKIP_MMP) &&
	    (flags & (EXT2_FLAG_RW | EXT2_FLAG_EXCLUSIVE))) {
		retval = ext2fs_mmp_start(fs);
		if (retval) {
			fs->flags |= EXT2_FLAG_SKIP_MMP; /* just do cleanup */
			ext2fs_mmp_stop(fs);
			goto cleanup;
		}
	}

	return 0;
cleanup:
	if (flags & EXT2_FLAG_NOFREE_ON_ERROR)
		*ret_fs = fs;
	else
		ext2fs_free(fs);
	return retval;
}