mirror of https://github.com/vitalif/e2fsprogs
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*
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* alloc_stats.c --- Update allocation statistics for ext2fs
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*
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* Copyright (C) 2001 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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*/
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#include <stdio.h>
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#include "ext2_fs.h"
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#include "ext2fs.h"
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void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
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int inuse, int isdir)
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{
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int group = ext2fs_group_of_ino(fs, ino);
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if (inuse > 0)
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ext2fs_mark_inode_bitmap(fs->inode_map, ino);
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else
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ext2fs_unmark_inode_bitmap(fs->inode_map, ino);
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fs->group_desc[group].bg_free_inodes_count -= inuse;
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if (isdir)
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fs->group_desc[group].bg_used_dirs_count += inuse;
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/* We don't strictly need to be clearing the uninit flag if inuse < 0
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* (i.e. freeing inodes) but it also means something is bad. */
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fs->group_desc[group].bg_flags &= ~EXT2_BG_INODE_UNINIT;
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if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
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EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
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ext2_ino_t first_unused_inode = fs->super->s_inodes_per_group -
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fs->group_desc[group].bg_itable_unused +
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group * fs->super->s_inodes_per_group + 1;
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if (ino >= first_unused_inode)
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fs->group_desc[group].bg_itable_unused =
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group * fs->super->s_inodes_per_group +
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fs->super->s_inodes_per_group - ino;
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ext2fs_group_desc_csum_set(fs, group);
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}
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fs->super->s_free_inodes_count -= inuse;
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ext2fs_mark_super_dirty(fs);
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ext2fs_mark_ib_dirty(fs);
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}
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void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse)
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{
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ext2fs_inode_alloc_stats2(fs, ino, inuse, 0);
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}
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void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse)
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{
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int group = ext2fs_group_of_blk(fs, blk);
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if (inuse > 0)
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ext2fs_mark_block_bitmap(fs->block_map, blk);
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else
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ext2fs_unmark_block_bitmap(fs->block_map, blk);
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fs->group_desc[group].bg_free_blocks_count -= inuse;
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fs->group_desc[group].bg_flags &= ~EXT2_BG_BLOCK_UNINIT;
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ext2fs_group_desc_csum_set(fs, group);
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fs->super->s_free_blocks_count -= inuse;
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ext2fs_mark_super_dirty(fs);
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ext2fs_mark_bb_dirty(fs);
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if (fs->block_alloc_stats)
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(fs->block_alloc_stats)(fs, (blk64_t) blk, inuse);
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}
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void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
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void (*func)(ext2_filsys fs,
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blk64_t blk,
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int inuse),
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void (**old)(ext2_filsys fs,
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blk64_t blk,
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int inuse))
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{
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if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)
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return;
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if (old)
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*old = fs->block_alloc_stats;
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fs->block_alloc_stats = func;
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}
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