1997-04-29 20:17:09 +04:00
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/*
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* rs_bitmap.c --- routine for changing the size of a bitmap
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*
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* Copyright (C) 1996, 1997 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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*/
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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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1997-04-29 20:17:09 +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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1997-04-29 20:17:09 +04:00
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#include <fcntl.h>
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#include <time.h>
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1997-10-20 04:33:00 +04:00
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#ifdef HAVE_SYS_STAT_H
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1997-04-29 20:17:09 +04:00
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#include <sys/stat.h>
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1997-10-20 04:33:00 +04:00
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#endif
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#ifdef HAVE_SYS_TYPES_H
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1997-04-29 20:17:09 +04:00
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#include <sys/types.h>
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1997-10-20 04:33:00 +04:00
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#endif
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1997-04-29 20:17:09 +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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#if EXT2_FLAT_INCLUDES
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#include "ext2_fs.h"
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#else
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1997-04-29 20:17:09 +04:00
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#include <linux/ext2_fs.h>
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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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#endif
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1997-04-29 20:17:09 +04:00
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#include "ext2fs.h"
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errcode_t ext2fs_resize_generic_bitmap(__u32 new_end, __u32 new_real_end,
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ext2fs_generic_bitmap bmap)
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{
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1997-10-26 06:41:24 +03:00
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errcode_t retval;
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size_t size, new_size;
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__u32 bitno;
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1997-04-29 20:17:09 +04:00
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if (!bmap)
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1997-10-31 09:07:47 +03:00
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return EXT2_ET_INVALID_ARGUMENT;
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1997-04-29 20:17:09 +04:00
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EXT2_CHECK_MAGIC(bmap, EXT2_ET_MAGIC_GENERIC_BITMAP);
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1997-06-09 18:51:29 +04:00
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/*
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* If we're expanding the bitmap, make sure all of the new
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* parts of the bitmap are zero.
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*/
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if (new_end > bmap->end) {
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bitno = bmap->real_end;
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if (bitno > new_end)
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bitno = new_end;
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for (; bitno > bmap->end; bitno--)
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ext2fs_clear_bit(bitno - bmap->start, bmap->bitmap);
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}
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1997-04-29 20:17:09 +04:00
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if (new_real_end == bmap->real_end) {
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bmap->end = new_end;
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return 0;
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}
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size = ((bmap->real_end - bmap->start) / 8) + 1;
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new_size = ((new_real_end - bmap->start) / 8) + 1;
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1998-04-27 05:41:13 +04:00
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if (size != new_size) {
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retval = ext2fs_resize_mem(size, new_size,
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(void **) &bmap->bitmap);
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if (retval)
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return retval;
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}
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1997-04-29 20:17:09 +04:00
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if (new_size > size)
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1997-10-26 06:41:24 +03:00
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memset(bmap->bitmap + size, 0, new_size - size);
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1997-04-29 20:17:09 +04:00
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bmap->end = new_end;
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bmap->real_end = new_real_end;
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return 0;
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}
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errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
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ext2fs_inode_bitmap bmap)
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{
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errcode_t retval;
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if (!bmap)
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1997-10-31 09:07:47 +03:00
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return EXT2_ET_INVALID_ARGUMENT;
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1997-04-29 20:17:09 +04:00
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EXT2_CHECK_MAGIC(bmap, EXT2_ET_MAGIC_INODE_BITMAP);
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bmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
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retval = ext2fs_resize_generic_bitmap(new_end, new_real_end,
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bmap);
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bmap->magic = EXT2_ET_MAGIC_INODE_BITMAP;
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return retval;
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}
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errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
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ext2fs_block_bitmap bmap)
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{
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errcode_t retval;
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if (!bmap)
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1997-10-31 09:07:47 +03:00
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return EXT2_ET_INVALID_ARGUMENT;
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1997-04-29 20:17:09 +04:00
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EXT2_CHECK_MAGIC(bmap, EXT2_ET_MAGIC_BLOCK_BITMAP);
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bmap->magic = EXT2_ET_MAGIC_GENERIC_BITMAP;
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retval = ext2fs_resize_generic_bitmap(new_end, new_real_end,
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bmap);
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bmap->magic = EXT2_ET_MAGIC_BLOCK_BITMAP;
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return retval;
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}
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