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_bitmap2(fs->inode_map, ino);
31 else
32 ext2fs_unmark_inode_bitmap2(fs->inode_map, ino);
33 ext2fs_bg_free_inodes_count_set(fs, group, ext2fs_bg_free_inodes_count(fs, group) - inuse);
34 if (isdir)
35 ext2fs_bg_used_dirs_count_set(fs, group, ext2fs_bg_used_dirs_count(fs, group) + 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 ext2fs_bg_flags_clear(fs, group, 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 ext2fs_bg_itable_unused(fs, group) +
44 group * fs->super->s_inodes_per_group + 1;
45
46 if (ino >= first_unused_inode)
47 ext2fs_bg_itable_unused_set(fs, group, group * fs->super->s_inodes_per_group + fs->super->s_inodes_per_group - ino);
48 ext2fs_group_desc_csum_set(fs, group);
49 }
50
51 fs->super->s_free_inodes_count -= inuse;
52 ext2fs_mark_super_dirty(fs);
53 ext2fs_mark_ib_dirty(fs);
54 }
55
ext2fs_inode_alloc_stats(ext2_filsys fs,ext2_ino_t ino,int inuse)56 void ext2fs_inode_alloc_stats(ext2_filsys fs, ext2_ino_t ino, int inuse)
57 {
58 ext2fs_inode_alloc_stats2(fs, ino, inuse, 0);
59 }
60
ext2fs_block_alloc_stats2(ext2_filsys fs,blk64_t blk,int inuse)61 void ext2fs_block_alloc_stats2(ext2_filsys fs, blk64_t blk, int inuse)
62 {
63 int group = ext2fs_group_of_blk2(fs, blk);
64
65 #ifndef OMIT_COM_ERR
66 if (blk >= ext2fs_blocks_count(fs->super)) {
67 com_err("ext2fs_block_alloc_stats", 0,
68 "Illegal block number: %lu", (unsigned long) blk);
69 return;
70 }
71 #endif
72 if (inuse > 0)
73 ext2fs_mark_block_bitmap2(fs->block_map, blk);
74 else
75 ext2fs_unmark_block_bitmap2(fs->block_map, blk);
76 ext2fs_bg_free_blocks_count_set(fs, group, ext2fs_bg_free_blocks_count(fs, group) - inuse);
77 ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT);
78 ext2fs_group_desc_csum_set(fs, group);
79
80 ext2fs_free_blocks_count_add(fs->super,
81 -inuse * EXT2FS_CLUSTER_RATIO(fs));
82 ext2fs_mark_super_dirty(fs);
83 ext2fs_mark_bb_dirty(fs);
84 if (fs->block_alloc_stats)
85 (fs->block_alloc_stats)(fs, (blk64_t) blk, inuse);
86 }
87
ext2fs_block_alloc_stats(ext2_filsys fs,blk_t blk,int inuse)88 void ext2fs_block_alloc_stats(ext2_filsys fs, blk_t blk, int inuse)
89 {
90 ext2fs_block_alloc_stats2(fs, blk, inuse);
91 }
92
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))93 void ext2fs_set_block_alloc_stats_callback(ext2_filsys fs,
94 void (*func)(ext2_filsys fs,
95 blk64_t blk,
96 int inuse),
97 void (**old)(ext2_filsys fs,
98 blk64_t blk,
99 int inuse))
100 {
101 if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)
102 return;
103 if (old)
104 *old = fs->block_alloc_stats;
105
106 fs->block_alloc_stats = func;
107 }
108