1997-04-26 17:34:30 +04:00
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/*
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* check_desc.c --- Check the group descriptors of an ext2 filesystem
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*
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1997-04-29 20:15:03 +04:00
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* Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
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*
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* %Begin-Header%
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* This file may be redistributed under the terms of the GNU Public
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* License.
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* %End-Header%
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1997-04-26 17:34:30 +04:00
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*/
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#include <stdio.h>
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#include <string.h>
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1997-08-11 03:07:40 +04:00
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#if HAVE_UNISTD_H
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1997-04-26 17:34:30 +04:00
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#include <unistd.h>
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1997-08-11 03:07:40 +04:00
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#endif
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1997-04-26 17:34:30 +04:00
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#include <fcntl.h>
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#include <time.h>
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1997-10-20 03:00:21 +04:00
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#if HAVE_SYS_STAT_H
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1997-04-26 17:34:30 +04:00
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#include <sys/stat.h>
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1997-10-20 03:00:21 +04:00
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#endif
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#if HAVE_SYS_TYPES_H
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1997-04-26 17:34:30 +04:00
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#include <sys/types.h>
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1997-10-20 03:00:21 +04:00
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#endif
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1997-04-26 17:34:30 +04:00
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Many files:
inode.c (ext2fs_open_inode_scan): Initialize the group variables
so that we don't need to call get_next_blockgroup() the first
time around. Saves a bit of time, and prevents us from
needing to assign -1 to current_group (which is an unsigned
value).
icount.c (insert_icount_el): Cast the estimated number of inodes
from a float to an ino_t.
alloc.c, alloc_tables.c, badlbocks.c, bb_compat.c, bb_inode.c,
bitmaps.c, bitops.c, block.c, bmap.c, bmove.c, brel_ma.c,
check_desc.c, closefs.c, cmp_bitmaps.c, dblist.c,
dblist_dir.c, dir_iterate.c, dirblock.c, dupfs.c, expanddir.c,
ext2fs.h, fileio.c, freefs.c, get_pathname.c, getsize.c,
icount.c, initialize.c, inline.c, inode.c, irel_ma.c,
ismounted.c, link.c, lookup.c, mkdir.c, namei.c, native.c,
newdir.c, openfs.c, read_bb.c, read_bb_file.c, rs_bitmap.c,
rw_bitmaps.c, swapfs.c, test_io.c, tst_badblocks.c,
tst_getsize.c, tst_iscan.c, unix_io.c, unlink.c, valid_blk.c,
version.c: If EXT2_FLAT_INCLUDES is defined, then assume all
of the ext2-specific header files are in a flat directory.
block.c, bmove.c, dirblock.c, fileio.c: Explicitly cast
all assignments from void * to be compatible with C++.
closefs.c (ext2fs_flush): Add a call to io_channel_flush() to
make sure the contents of the disk are flushed to disk.
dblist.c (ext2fs_add_dir_block): Change new to be new_entry to
avoid C++ namespace clash.
bitmaps.c (ext2fs_copy_bitmap): Change new to be new_map to
avoid C++ namespace clash.
ext2fs.h, bb_inode.c, block.c, bmove.c, brel.h, brel_ma.c,
irel.h, irel_ma.c, dblist.c, dblist_dir.c, dir_iterate.c,
ext2fsP.h, expanddir.c, get_pathname.c, inode.c, link.c,
unlink.c: Change private to be priv_data (to avoid C++
namespace clash)
1998-01-19 17:47:53 +03:00
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#include "ext2_fs.h"
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1997-04-26 17:34:30 +04:00
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#include "ext2fs.h"
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/*
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* This routine sanity checks the group descriptors
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*/
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errcode_t ext2fs_check_desc(ext2_filsys fs)
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{
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2003-12-07 09:28:50 +03:00
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dgrp_t i;
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2006-09-12 22:55:22 +04:00
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blk_t first_block = fs->super->s_first_data_block;
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blk_t last_block;
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1997-04-26 17:34:30 +04:00
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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for (i = 0; i < fs->group_desc_count; i++) {
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2006-09-12 22:56:16 +04:00
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first_block = ext2fs_group_first_block(fs, i);
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last_block = ext2fs_group_last_block(fs, i);
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1997-04-26 17:34:30 +04:00
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/*
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* Check to make sure block bitmap for group is
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* located within the group.
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*/
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2006-09-12 22:55:22 +04:00
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if (fs->group_desc[i].bg_block_bitmap < first_block ||
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fs->group_desc[i].bg_block_bitmap > last_block)
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1997-04-26 17:34:30 +04:00
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return EXT2_ET_GDESC_BAD_BLOCK_MAP;
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/*
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* Check to make sure inode bitmap for group is
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* located within the group
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*/
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2006-09-12 22:55:22 +04:00
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if (fs->group_desc[i].bg_inode_bitmap < first_block ||
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fs->group_desc[i].bg_inode_bitmap > last_block)
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1997-04-26 17:34:30 +04:00
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return EXT2_ET_GDESC_BAD_INODE_MAP;
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/*
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* Check to make sure inode table for group is located
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* within the group
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*/
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2006-09-12 22:55:22 +04:00
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if (fs->group_desc[i].bg_inode_table < first_block ||
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1997-04-26 18:48:50 +04:00
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((fs->group_desc[i].bg_inode_table +
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2007-07-21 01:50:26 +04:00
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fs->inode_blocks_per_group - 1) > last_block))
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1997-04-26 17:34:30 +04:00
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return EXT2_ET_GDESC_BAD_INODE_TABLE;
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}
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return 0;
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}
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