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/*
ext2_meta.c -- ext2 metadata mover
Copyright (C) 1998-2000, 2007, 2009-2010 Free Software Foundation,
Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#ifndef DISCOVER_ONLY
#include <stdio.h>
#include <stdlib.h>
#include "ext2.h"
int ext2_metadata_push(struct ext2_fs *fs, blk_t newsize)
{
int i;
int newgdblocks;
blk_t newitoffset;
newgdblocks = ped_div_round_up (newsize
- EXT2_SUPER_FIRST_DATA_BLOCK(fs->sb),
EXT2_SUPER_BLOCKS_PER_GROUP(fs->sb));
newgdblocks = ped_div_round_up (newgdblocks
* sizeof(struct ext2_group_desc),
fs->blocksize);
newitoffset = newgdblocks + 3;
if (newitoffset <= fs->itoffset)
return 1;
for (i=0;i<fs->numgroups;i++)
{
blk_t diff;
blk_t j;
blk_t fromblock;
blk_t start;
start = (i * EXT2_SUPER_BLOCKS_PER_GROUP(fs->sb))
+ EXT2_SUPER_FIRST_DATA_BLOCK(fs->sb);
if (EXT2_GROUP_INODE_TABLE(fs->gd[i]) >= start + newitoffset
&& EXT2_GROUP_BLOCK_BITMAP(fs->gd[i]) >= start + newitoffset - 2
&& EXT2_GROUP_INODE_BITMAP(fs->gd[i]) >= start + newitoffset - 1)
continue;
diff = newitoffset - (EXT2_GROUP_INODE_TABLE(fs->gd[i]) - start);
/* inode table */
fromblock = EXT2_GROUP_INODE_TABLE(fs->gd[i]) + fs->inodeblocks;
if (fs->opt_debug)
{
for (j=0;j<diff;j++)
if (!ext2_get_block_state(fs, fromblock+j))
{
fprintf(stderr,
"error: block relocator "
"should have relocated "
"%i\n",
fromblock);
return 0;
}
}
for (j=0;j<diff;j++)
if (!ext2_set_block_state(fs, fromblock+j, 1, 0))
return 0;
if (!ext2_move_blocks(fs,
EXT2_GROUP_INODE_TABLE(fs->gd[i]),
fs->inodeblocks,
EXT2_GROUP_INODE_TABLE(fs->gd[i]) + diff))
return 0;
fs->gd[i].bg_inode_table = PED_CPU_TO_LE32 (
EXT2_GROUP_INODE_TABLE(fs->gd[i]) + diff);
fs->metadirty |= EXT2_META_GD;
if (fs->opt_safe)
if (!ext2_sync(fs))
return 0;
/* block bitmap and inode bitmap */
fromblock = EXT2_GROUP_INODE_TABLE(fs->gd[i]);
if (ext2_is_group_sparse(fs, i))
{
if (!ext2_copy_block(fs,
EXT2_GROUP_INODE_BITMAP(fs->gd[i]),
EXT2_GROUP_INODE_BITMAP(fs->gd[i]) + diff))
return 0;
fs->gd[i].bg_inode_bitmap = PED_CPU_TO_LE32 (
EXT2_GROUP_INODE_BITMAP(fs->gd[i]) + diff);
fs->metadirty |= EXT2_META_GD;
if (fs->opt_safe)
if (!ext2_sync(fs))
return 0;
if (!ext2_copy_block(fs,
EXT2_GROUP_BLOCK_BITMAP(fs->gd[i]),
EXT2_GROUP_BLOCK_BITMAP(fs->gd[i])+diff))
return 0;
fs->gd[i].bg_block_bitmap = PED_CPU_TO_LE32 (
EXT2_GROUP_BLOCK_BITMAP(fs->gd[i]) + diff);
fs->metadirty |= EXT2_META_GD;
if (fs->opt_safe)
if (!ext2_sync(fs))
return 0;
fromblock = EXT2_GROUP_BLOCK_BITMAP(fs->gd[i]);
}
ext2_zero_blocks(fs, fromblock-diff, diff);
for (j=0;j<diff;j++)
if (!ext2_set_block_state(fs, fromblock+j-diff, 0, 0))
return 0;
if (fs->opt_verbose)
fprintf(stderr,
"ext2_metadata_push: group %i/%i\r",
i+1, fs->numgroups);
}
fs->itoffset = newitoffset;
if (fs->opt_verbose)
fputc ('\n', stderr);
return 1;
}
#endif /* !DISCOVER_ONLY */
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