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/*
* alloc_stats.c --- Update allocation statistics for ext2fs
*
* Copyright (C) 2001 Theodore Ts'o.
*
* %Begin-Header%
* This file may be redistributed under the terms of the GNU Public
* License.
* %End-Header%
*
*/
#include <stdio.h>
#include "ext2_fs.h"
#include "ext2fs.h"
void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
int inuse, int isdir)
{
int group = ext2fs_group_of_ino(fs, ino);
if (inuse > 0)
ext2fs_mark_inode_bitmap(fs->inode_map, ino);
else
ext2fs_unmark_inode_bitmap(fs->inode_map, ino);
fs->group_desc[group].bg_free_inodes_count -= inuse;
if (isdir)
fs->group_desc[group].bg_used_dirs_count += inuse;
/* We don't strictly need to be clearing the uninit flag if inuse < 0
* (i.e. freeing inodes) but it also means something is bad. */
fs->group_desc[group].bg_flags &= ~EXT2_BG_INODE_UNINIT;
if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
ext2_ino_t first_unused_inode = fs->super->s_inodes_per_group -
fs->group_desc[group].bg_itable_unused +
group * fs->super->s_inodes_per_group + 1;
if (ino >= first_unused_inode)
fs->group_desc[group].bg_itable_unused =
group * fs->super->s_inodes_per_group +
fs->super->s_inodes_per_group - ino;
ext2fs_group_desc_csum_set(fs, group);
}
fs->super->s_free_inodes_count -= inuse;
ext2fs_mark_super_dirty(fs);
ext2fs_mark_ib_dirty(fs);
}
void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse)
{
ext2fs_inode_alloc_stats2(fs, ino, inuse, 0);
}
void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse)
{
int group = ext2fs_group_of_blk(fs, blk);
if (inuse > 0)
ext2fs_mark_block_bitmap(fs->block_map, blk);
else
ext2fs_unmark_block_bitmap(fs->block_map, blk);
fs->group_desc[group].bg_free_blocks_count -= inuse;
fs->group_desc[group].bg_flags &= ~EXT2_BG_BLOCK_UNINIT;
ext2fs_group_desc_csum_set(fs, group);
fs->super->s_free_blocks_count -= inuse;
ext2fs_mark_super_dirty(fs);
ext2fs_mark_bb_dirty(fs);
if (fs->block_alloc_stats)
(fs->block_alloc_stats)(fs, (blk64_t) blk, inuse);
}
void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
void (*func)(ext2_filsys fs,
blk64_t blk,
int inuse),
void (**old)(ext2_filsys fs,
blk64_t blk,
int inuse))
{
if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)
return;
if (old)
*old = fs->block_alloc_stats;
fs->block_alloc_stats = func;
}
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