1997-04-26 17:21:57 +04:00
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/*
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* bitmaps.c --- routines to read, write, and manipulate the inode and
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* block bitmaps.
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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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2010-05-18 05:31:56 +04:00
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* This file may be redistributed under the terms of the GNU Library
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* General Public License, version 2.
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1997-04-29 20:15:03 +04:00
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* %End-Header%
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1997-04-26 17:21:57 +04:00
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*/
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2011-09-19 01:34:37 +04:00
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#include "config.h"
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1997-04-26 17:21:57 +04:00
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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 17:21:57 +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 17:21:57 +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 17:21:57 +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 17:21:57 +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 17:21:57 +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 17:21:57 +04:00
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#include "ext2fs.h"
|
2009-08-05 08:27:10 +04:00
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#include "ext2fsP.h"
|
2011-06-11 01:55:09 +04:00
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#include "bmap64.h"
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1997-04-26 17:21:57 +04:00
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|
2007-07-23 06:59:50 +04:00
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void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
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1997-04-26 17:21:57 +04:00
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{
|
2009-08-05 08:27:10 +04:00
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ext2fs_free_generic_bmap(bitmap);
|
1997-04-26 17:21:57 +04:00
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}
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2007-07-23 06:59:50 +04:00
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void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
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1997-04-30 01:26:48 +04:00
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{
|
2009-08-05 08:27:10 +04:00
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ext2fs_free_generic_bmap(bitmap);
|
1997-04-30 01:26:48 +04:00
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}
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errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
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ext2fs_generic_bitmap *dest)
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{
|
2009-08-05 08:27:10 +04:00
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return (ext2fs_copy_generic_bmap(src, dest));
|
1997-04-30 01:26:48 +04:00
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}
|
1997-09-13 04:32:29 +04:00
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void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map)
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{
|
2009-08-05 08:27:10 +04:00
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ext2fs_set_generic_bmap_padding(map);
|
2008-08-28 07:07:54 +04:00
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}
|
1997-04-30 01:26:48 +04:00
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1997-04-29 18:53:37 +04:00
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errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
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const char *descr,
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ext2fs_inode_bitmap *ret)
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{
|
2009-08-05 08:27:10 +04:00
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__u64 start, end, real_end;
|
1997-04-29 18:53:37 +04:00
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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fs->write_bitmaps = ext2fs_write_bitmaps;
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start = 1;
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end = fs->super->s_inodes_count;
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real_end = (EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count);
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2009-08-05 08:27:10 +04:00
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/* Are we permitted to use new-style bitmaps? */
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if (fs->flags & EXT2_FLAG_64BITS)
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return (ext2fs_alloc_generic_bmap(fs,
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EXT2_ET_MAGIC_INODE_BITMAP64,
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EXT2FS_BMAP64_BITARRAY,
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start, end, real_end, descr, ret));
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/* Otherwise, check to see if the file system is small enough
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* to use old-style 32-bit bitmaps */
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if ((end > ~0U) || (real_end > ~0U))
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return EXT2_ET_CANT_USE_LEGACY_BITMAPS;
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2007-07-23 06:59:50 +04:00
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return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP, fs,
|
2009-08-05 08:27:10 +04:00
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start, end, real_end,
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descr, 0,
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(ext2fs_generic_bitmap *) ret));
|
1997-04-29 18:53:37 +04:00
|
|
|
}
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|
1997-04-26 17:34:30 +04:00
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errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
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|
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const char *descr,
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|
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ext2fs_block_bitmap *ret)
|
1997-04-26 17:21:57 +04:00
|
|
|
{
|
2009-08-05 08:27:10 +04:00
|
|
|
__u64 start, end, real_end;
|
1997-04-26 17:21:57 +04:00
|
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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);
|
1997-04-26 17:21:57 +04:00
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|
1997-04-26 17:34:30 +04:00
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fs->write_bitmaps = ext2fs_write_bitmaps;
|
1997-04-26 17:21:57 +04:00
|
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|
2011-06-11 01:55:09 +04:00
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start = EXT2FS_B2C(fs, fs->super->s_first_data_block);
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end = EXT2FS_B2C(fs, ext2fs_blocks_count(fs->super)-1);
|
2011-06-05 04:24:36 +04:00
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|
real_end = ((__u64) EXT2_CLUSTERS_PER_GROUP(fs->super)
|
2009-09-08 05:23:03 +04:00
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* (__u64) fs->group_desc_count)-1 + start;
|
2008-08-28 07:07:54 +04:00
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|
2009-08-05 08:27:10 +04:00
|
|
|
if (fs->flags & EXT2_FLAG_64BITS)
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|
return (ext2fs_alloc_generic_bmap(fs,
|
|
|
|
EXT2_ET_MAGIC_BLOCK_BITMAP64,
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|
|
EXT2FS_BMAP64_BITARRAY,
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start, end, real_end, descr, ret));
|
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|
if ((end > ~0U) || (real_end > ~0U))
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return EXT2_ET_CANT_USE_LEGACY_BITMAPS;
|
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|
2007-07-23 06:59:50 +04:00
|
|
|
return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP, fs,
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|
start, end, real_end,
|
2009-08-05 08:27:10 +04:00
|
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|
descr, 0,
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(ext2fs_generic_bitmap *) ret));
|
1997-04-26 17:21:57 +04:00
|
|
|
}
|
|
|
|
|
2011-06-11 01:55:09 +04:00
|
|
|
/*
|
|
|
|
* ext2fs_allocate_block_bitmap() really allocates a per-cluster
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|
* bitmap for backwards compatibility. This function allocates a
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|
|
* block bitmap which is truly per-block, even if clusters/bigalloc
|
|
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|
* are enabled. mke2fs and e2fsck need this for tracking the
|
|
|
|
* allocation of the file system metadata blocks.
|
|
|
|
*/
|
|
|
|
errcode_t ext2fs_allocate_subcluster_bitmap(ext2_filsys fs,
|
|
|
|
const char *descr,
|
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|
|
ext2fs_block_bitmap *ret)
|
|
|
|
{
|
|
|
|
__u64 start, end, real_end;
|
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|
|
ext2fs_generic_bitmap bmap;
|
|
|
|
errcode_t retval;
|
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|
|
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EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
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fs->write_bitmaps = ext2fs_write_bitmaps;
|
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|
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if (!fs->cluster_ratio_bits)
|
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|
|
return ext2fs_allocate_block_bitmap(fs, descr, ret);
|
|
|
|
|
|
|
|
if ((fs->flags & EXT2_FLAG_64BITS) == 0)
|
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|
return EXT2_ET_CANT_USE_LEGACY_BITMAPS;
|
|
|
|
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|
start = fs->super->s_first_data_block;
|
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|
end = ext2fs_blocks_count(fs->super)-1;
|
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|
|
real_end = ((__u64) EXT2_BLOCKS_PER_GROUP(fs->super)
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|
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* (__u64) fs->group_desc_count)-1 + start;
|
|
|
|
|
|
|
|
retval = ext2fs_alloc_generic_bmap(fs, EXT2_ET_MAGIC_BLOCK_BITMAP64,
|
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|
|
EXT2FS_BMAP64_BITARRAY, start,
|
|
|
|
end, real_end, descr, &bmap);
|
|
|
|
if (retval)
|
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|
|
return retval;
|
|
|
|
bmap->cluster_bits = 0;
|
|
|
|
*ret = bmap;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
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|
|
int ext2fs_get_bitmap_granularity(ext2fs_block_bitmap bitmap)
|
|
|
|
{
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ext2fs_generic_bitmap bmap = bitmap;
|
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|
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if (!EXT2FS_IS_64_BITMAP(bmap))
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return 0;
|
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return bmap->cluster_bits;
|
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|
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}
|
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|
1997-04-26 17:34:30 +04:00
|
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|
errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
|
Many files:
alloc.c, bb_inode.c, bitmaps.c, bitops.h, block.c, bmap.c, bmove.c,
brel.h, cmp_bitmaps.c, dblist.c, dblist_dir.c, dir_iterate.c,
expanddir.c, ext2fs.h, ext2fsP.h, fileio.c, finddev.c, get_pathname.c,
icount.c, inode.c, irel.h, irel_ma.c, ismounted.c, link.c, lookup.c,
mkdir.c, mkjournal.c, namei.c, newdir.c, read_bb_file.c, test_io.c,
tst_iscan.c, unix_io.c, unlink.c: Change use of ino_t to ext2_ino_t,
to protect applications that attempt to compile
-D_FILE_OFFSET_BITS=64, since this inexplicably changes ino_t(!?). So
we use ext2_ino_t to avoid an unexpected ABI change.
2001-01-11 07:54:39 +03:00
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ext2_ino_t end, ext2_ino_t *oend)
|
1997-04-26 17:21:57 +04:00
|
|
|
{
|
2009-08-05 08:27:10 +04:00
|
|
|
__u64 tmp_oend;
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|
|
int retval;
|
2007-07-23 06:59:50 +04:00
|
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|
2009-08-05 08:27:10 +04:00
|
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retval = ext2fs_fudge_generic_bmap_end((ext2fs_generic_bitmap) bitmap,
|
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|
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EXT2_ET_FUDGE_INODE_BITMAP_END,
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|
|
end, &tmp_oend);
|
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|
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if (oend)
|
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|
|
*oend = tmp_oend;
|
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|
|
return retval;
|
1997-04-26 17:21:57 +04:00
|
|
|
}
|
|
|
|
|
1997-04-26 17:34:30 +04:00
|
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|
errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
|
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|
|
blk_t end, blk_t *oend)
|
1997-04-26 17:21:57 +04:00
|
|
|
{
|
2007-07-23 06:59:50 +04:00
|
|
|
return (ext2fs_fudge_generic_bitmap_end(bitmap,
|
|
|
|
EXT2_ET_MAGIC_BLOCK_BITMAP,
|
|
|
|
EXT2_ET_FUDGE_BLOCK_BITMAP_END,
|
|
|
|
end, oend));
|
1997-04-26 17:21:57 +04:00
|
|
|
}
|
|
|
|
|
2009-08-05 08:27:10 +04:00
|
|
|
errcode_t ext2fs_fudge_block_bitmap_end2(ext2fs_block_bitmap bitmap,
|
|
|
|
blk64_t end, blk64_t *oend)
|
|
|
|
{
|
|
|
|
return (ext2fs_fudge_generic_bmap_end(bitmap,
|
|
|
|
EXT2_ET_FUDGE_BLOCK_BITMAP_END,
|
|
|
|
end, oend));
|
|
|
|
}
|
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap)
|
1997-04-26 17:21:57 +04:00
|
|
|
{
|
2009-08-05 08:27:10 +04:00
|
|
|
ext2fs_clear_generic_bmap(bitmap);
|
1997-04-26 17:21:57 +04:00
|
|
|
}
|
|
|
|
|
1997-04-26 17:34:30 +04:00
|
|
|
void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap)
|
1997-04-26 17:21:57 +04:00
|
|
|
{
|
2009-08-05 08:27:10 +04:00
|
|
|
ext2fs_clear_generic_bmap(bitmap);
|
1997-04-26 17:34:30 +04:00
|
|
|
}
|
2007-07-23 07:42:14 +04:00
|
|
|
|
|
|
|
errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
|
|
|
|
ext2fs_inode_bitmap bmap)
|
|
|
|
{
|
|
|
|
return (ext2fs_resize_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP,
|
|
|
|
new_end, new_real_end, bmap));
|
|
|
|
}
|
|
|
|
|
2009-08-05 08:27:10 +04:00
|
|
|
errcode_t ext2fs_resize_inode_bitmap2(__u64 new_end, __u64 new_real_end,
|
|
|
|
ext2fs_inode_bitmap bmap)
|
|
|
|
{
|
|
|
|
return (ext2fs_resize_generic_bmap(bmap, new_end, new_real_end));
|
|
|
|
}
|
|
|
|
|
2007-07-23 07:42:14 +04:00
|
|
|
errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
|
|
|
|
ext2fs_block_bitmap bmap)
|
|
|
|
{
|
|
|
|
return (ext2fs_resize_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP,
|
|
|
|
new_end, new_real_end, bmap));
|
|
|
|
}
|
|
|
|
|
2009-08-05 08:27:10 +04:00
|
|
|
errcode_t ext2fs_resize_block_bitmap2(__u64 new_end, __u64 new_real_end,
|
|
|
|
ext2fs_block_bitmap bmap)
|
|
|
|
{
|
|
|
|
return (ext2fs_resize_generic_bmap(bmap, new_end, new_real_end));
|
|
|
|
}
|
|
|
|
|
2007-07-23 07:42:14 +04:00
|
|
|
errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
|
|
|
|
ext2fs_block_bitmap bm2)
|
|
|
|
{
|
2009-08-05 08:27:10 +04:00
|
|
|
return (ext2fs_compare_generic_bmap(EXT2_ET_NEQ_BLOCK_BITMAP,
|
|
|
|
bm1, bm2));
|
2007-07-23 07:42:14 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
|
|
|
|
ext2fs_inode_bitmap bm2)
|
|
|
|
{
|
2009-08-05 08:27:10 +04:00
|
|
|
return (ext2fs_compare_generic_bmap(EXT2_ET_NEQ_INODE_BITMAP,
|
|
|
|
bm1, bm2));
|
2007-07-23 07:42:14 +04:00
|
|
|
}
|
|
|
|
|
2007-07-23 12:32:48 +04:00
|
|
|
errcode_t ext2fs_set_inode_bitmap_range(ext2fs_inode_bitmap bmap,
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ext2_ino_t start, unsigned int num,
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void *in)
|
|
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|
{
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|
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return (ext2fs_set_generic_bitmap_range(bmap,
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EXT2_ET_MAGIC_INODE_BITMAP,
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|
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|
start, num, in));
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}
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2009-08-05 08:27:10 +04:00
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errcode_t ext2fs_set_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
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|
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__u64 start, size_t num,
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|
|
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void *in)
|
|
|
|
{
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|
|
|
return (ext2fs_set_generic_bmap_range(bmap, start, num, in));
|
|
|
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}
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|
|
|
2007-07-23 12:32:48 +04:00
|
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errcode_t ext2fs_get_inode_bitmap_range(ext2fs_inode_bitmap bmap,
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|
|
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ext2_ino_t start, unsigned int num,
|
|
|
|
void *out)
|
|
|
|
{
|
|
|
|
return (ext2fs_get_generic_bitmap_range(bmap,
|
|
|
|
EXT2_ET_MAGIC_INODE_BITMAP,
|
|
|
|
start, num, out));
|
|
|
|
}
|
|
|
|
|
2009-08-05 08:27:10 +04:00
|
|
|
errcode_t ext2fs_get_inode_bitmap_range2(ext2fs_inode_bitmap bmap,
|
|
|
|
__u64 start, size_t num,
|
|
|
|
void *out)
|
|
|
|
{
|
|
|
|
return (ext2fs_get_generic_bmap_range(bmap, start, num, out));
|
|
|
|
}
|
|
|
|
|
2007-07-23 12:32:48 +04:00
|
|
|
errcode_t ext2fs_set_block_bitmap_range(ext2fs_block_bitmap bmap,
|
|
|
|
blk_t start, unsigned int num,
|
|
|
|
void *in)
|
|
|
|
{
|
2008-08-28 07:07:54 +04:00
|
|
|
return (ext2fs_set_generic_bitmap_range(bmap,
|
2007-07-23 12:32:48 +04:00
|
|
|
EXT2_ET_MAGIC_BLOCK_BITMAP,
|
|
|
|
start, num, in));
|
|
|
|
}
|
|
|
|
|
2009-08-05 08:27:10 +04:00
|
|
|
errcode_t ext2fs_set_block_bitmap_range2(ext2fs_block_bitmap bmap,
|
|
|
|
blk64_t start, size_t num,
|
|
|
|
void *in)
|
|
|
|
{
|
|
|
|
return (ext2fs_set_generic_bmap_range(bmap, start, num, in));
|
|
|
|
}
|
|
|
|
|
2007-07-23 12:32:48 +04:00
|
|
|
errcode_t ext2fs_get_block_bitmap_range(ext2fs_block_bitmap bmap,
|
|
|
|
blk_t start, unsigned int num,
|
|
|
|
void *out)
|
|
|
|
{
|
|
|
|
return (ext2fs_get_generic_bitmap_range(bmap,
|
|
|
|
EXT2_ET_MAGIC_BLOCK_BITMAP,
|
|
|
|
start, num, out));
|
|
|
|
}
|
2009-08-05 08:27:10 +04:00
|
|
|
|
|
|
|
errcode_t ext2fs_get_block_bitmap_range2(ext2fs_block_bitmap bmap,
|
|
|
|
blk64_t start, size_t num,
|
|
|
|
void *out)
|
|
|
|
{
|
|
|
|
return (ext2fs_get_generic_bmap_range(bmap, start, num, out));
|
|
|
|
}
|