1 /*
2 * alloc_stats.c --- Update allocation statistics for ext2fs
3 *
4 * Copyright (C) 2001 Theodore Ts'o.
5 *
6 * %Begin-Header%
7 * This file may be redistributed under the terms of the GNU Library
8 * General Public License, version 2.
9 * %End-Header%
10 */
11
12 #include <stdio.h>
13
14 #include "ext2_fs.h"
15 #include "ext2fs.h"
16
ext2fs_inode_alloc_stats2(ext2_filsys fs,ext2_ino_t ino,int inuse,int isdir)17 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
18 int inuse, int isdir)
19 {
20 int group = ext2fs_group_of_ino(fs, ino);
21
22 #ifndef OMIT_COM_ERR
23 if (ino > fs->super->s_inodes_count) {
24 com_err("ext2fs_inode_alloc_stats2", 0,
25 "Illegal inode number: %lu", (unsigned long) ino);
26 return;
27 }
28 #endif
29 if (inuse > 0)
30 ext2fs_mark_inode_bitmap(fs->inode_map, ino);
31 else
32 ext2fs_unmark_inode_bitmap(fs->inode_map, ino);
33 fs->group_desc[group].bg_free_inodes_count -= inuse;
34 if (isdir)
35 fs->group_desc[group].bg_used_dirs_count += inuse;
36
37 /* We don't strictly need to be clearing the uninit flag if inuse < 0
38 * (i.e. freeing inodes) but it also means something is bad. */
39 fs->group_desc[group].bg_flags &= ~EXT2_BG_INODE_UNINIT;
40 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
41 EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) {
42 ext2_ino_t first_unused_inode = fs->super->s_inodes_per_group -
43 fs->group_desc[group].bg_itable_unused +
44 group * fs->super->s_inodes_per_group + 1;
45
46 if (ino >= first_unused_inode)
47 fs->group_desc[group].bg_itable_unused =
48 group * fs->super->s_inodes_per_group +
49 fs->super->s_inodes_per_group - ino;
50 ext2fs_group_desc_csum_set(fs, group);
51 }
52
53 fs->super->s_free_inodes_count -= inuse;
54 ext2fs_mark_super_dirty(fs);
55 ext2fs_mark_ib_dirty(fs);
56 }
57
ext2fs_inode_alloc_stats(ext2_filsys fs,ext2_ino_t ino,int inuse)58 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse)
59 {
60 ext2fs_inode_alloc_stats2(fs, ino, inuse, 0);
61 }
62
ext2fs_block_alloc_stats(ext2_filsys fs,blk_t blk,int inuse)63 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse)
64 {
65 int group = ext2fs_group_of_blk(fs, blk);
66
67 #ifndef OMIT_COM_ERR
68 if (blk >= fs->super->s_blocks_count) {
69 com_err("ext2fs_block_alloc_stats", 0,
70 "Illegal block number: %lu", (unsigned long) blk);
71 return;
72 }
73 #endif
74 if (inuse > 0)
75 ext2fs_mark_block_bitmap(fs->block_map, blk);
76 else
77 ext2fs_unmark_block_bitmap(fs->block_map, blk);
78 fs->group_desc[group].bg_free_blocks_count -= inuse;
79 fs->group_desc[group].bg_flags &= ~EXT2_BG_BLOCK_UNINIT;
80 ext2fs_group_desc_csum_set(fs, group);
81
82 fs->super->s_free_blocks_count -= inuse;
83 ext2fs_mark_super_dirty(fs);
84 ext2fs_mark_bb_dirty(fs);
85 if (fs->block_alloc_stats)
86 (fs->block_alloc_stats)(fs, (blk64_t) blk, inuse);
87 }
88
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))89 void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
90 void (*func)(ext2_filsys fs,
91 blk64_t blk,
92 int inuse),
93 void (**old)(ext2_filsys fs,
94 blk64_t blk,
95 int inuse))
96 {
97 if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)
98 return;
99 if (old)
100 *old = fs->block_alloc_stats;
101
102 fs->block_alloc_stats = func;
103 }
104