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 "config.h"
13 #include <stdio.h>
14
15 #include "ext2_fs.h"
16 #include "ext2fs.h"
17
ext2fs_inode_alloc_stats2(ext2_filsys fs,ext2_ino_t ino,int inuse,int isdir)18 void ext2fs_inode_alloc_stats2(ext2_filsys fs, ext2_ino_t ino,
19 int inuse, int isdir)
20 {
21 int group = ext2fs_group_of_ino(fs, ino);
22
23 if (ino > fs->super->s_inodes_count) {
24 #ifndef OMIT_COM_ERR
25 com_err("ext2fs_inode_alloc_stats2", 0,
26 "Illegal inode number: %lu", (unsigned long) ino);
27 #endif
28 return;
29 }
30 if (inuse > 0)
31 ext2fs_mark_inode_bitmap2(fs->inode_map, ino);
32 else
33 ext2fs_unmark_inode_bitmap2(fs->inode_map, ino);
34 ext2fs_bg_free_inodes_count_set(fs, group, ext2fs_bg_free_inodes_count(fs, group) - inuse);
35 if (isdir)
36 ext2fs_bg_used_dirs_count_set(fs, group, ext2fs_bg_used_dirs_count(fs, group) + inuse);
37
38 /* We don't strictly need to be clearing the uninit flag if inuse < 0
39 * (i.e. freeing inodes) but it also means something is bad. */
40 ext2fs_bg_flags_clear(fs, group, EXT2_BG_INODE_UNINIT);
41 if (ext2fs_has_group_desc_csum(fs)) {
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 if (blk >= ext2fs_blocks_count(fs->super)) {
66 #ifndef OMIT_COM_ERR
67 com_err("ext2fs_block_alloc_stats", 0,
68 "Illegal block number: %lu", (unsigned long) blk);
69 #endif
70 return;
71 }
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 * (blk64_t) 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
ext2fs_block_alloc_stats_range(ext2_filsys fs,blk64_t blk,blk_t num,int inuse)109 void ext2fs_block_alloc_stats_range(ext2_filsys fs, blk64_t blk,
110 blk_t num, int inuse)
111 {
112 #ifndef OMIT_COM_ERR
113 if (blk + num > ext2fs_blocks_count(fs->super)) {
114 com_err("ext2fs_block_alloc_stats_range", 0,
115 "Illegal block range: %llu (%u) ",
116 (unsigned long long) blk, num);
117 return;
118 }
119 #endif
120 if (inuse == 0)
121 return;
122 if (inuse > 0) {
123 ext2fs_mark_block_bitmap_range2(fs->block_map, blk, num);
124 inuse = 1;
125 } else {
126 ext2fs_unmark_block_bitmap_range2(fs->block_map, blk, num);
127 inuse = -1;
128 }
129 while (num) {
130 int group = ext2fs_group_of_blk2(fs, blk);
131 blk64_t last_blk = ext2fs_group_last_block2(fs, group);
132 blk64_t n = num;
133
134 if (blk + num > last_blk)
135 n = last_blk - blk + 1;
136
137 ext2fs_bg_free_blocks_count_set(fs, group,
138 ext2fs_bg_free_blocks_count(fs, group) -
139 inuse*n/EXT2FS_CLUSTER_RATIO(fs));
140 ext2fs_bg_flags_clear(fs, group, EXT2_BG_BLOCK_UNINIT);
141 ext2fs_group_desc_csum_set(fs, group);
142 ext2fs_free_blocks_count_add(fs->super, -inuse * (blk64_t) n);
143 blk += n;
144 num -= n;
145 }
146 ext2fs_mark_super_dirty(fs);
147 ext2fs_mark_bb_dirty(fs);
148 if (fs->block_alloc_stats_range)
149 (fs->block_alloc_stats_range)(fs, blk, num, inuse);
150 }
151
ext2fs_set_block_alloc_stats_range_callback(ext2_filsys fs,void (* func)(ext2_filsys fs,blk64_t blk,blk_t num,int inuse),void (** old)(ext2_filsys fs,blk64_t blk,blk_t num,int inuse))152 void ext2fs_set_block_alloc_stats_range_callback(ext2_filsys fs,
153 void (*func)(ext2_filsys fs, blk64_t blk,
154 blk_t num, int inuse),
155 void (**old)(ext2_filsys fs, blk64_t blk,
156 blk_t num, int inuse))
157 {
158 if (!fs || fs->magic != EXT2_ET_MAGIC_EXT2FS_FILSYS)
159 return;
160 if (old)
161 *old = fs->block_alloc_stats_range;
162
163 fs->block_alloc_stats_range = func;
164 }
165