bitmaps.c revision 50448d3dffc66f86592ee0d4b16e4bbe9d08449e 
1/*
2 * bitmaps.c --- routines to read, write, and manipulate the inode and
3 * block bitmaps.
4 *
5 * Copyright (C) 1993, 1994, 1995, 1996 Theodore Ts'o.
6 *
7 * %Begin-Header%
8 * This file may be redistributed under the terms of the GNU Public
9 * License.
10 * %End-Header%
11 */
12
13#include <stdio.h>
14#include <string.h>
15#if HAVE_UNISTD_H
16#include <unistd.h>
17#endif
18#include <fcntl.h>
19#include <time.h>
20#if HAVE_SYS_STAT_H
21#include <sys/stat.h>
22#endif
23#if HAVE_SYS_TYPES_H
24#include <sys/types.h>
25#endif
26
27#include "ext2_fs.h"
28#include "ext2fs.h"
29
30void ext2fs_free_inode_bitmap(ext2fs_inode_bitmap bitmap)
31{
32	ext2fs_free_generic_bitmap(bitmap);
33}
34
35void ext2fs_free_block_bitmap(ext2fs_block_bitmap bitmap)
36{
37	ext2fs_free_generic_bitmap(bitmap);
38}
39
40errcode_t ext2fs_copy_bitmap(ext2fs_generic_bitmap src,
41			     ext2fs_generic_bitmap *dest)
42{
43	return (ext2fs_copy_generic_bitmap(src, dest));
44}
45
46void ext2fs_set_bitmap_padding(ext2fs_generic_bitmap map)
47{
48	ext2fs_set_generic_bitmap_padding(map);
49}
50
51errcode_t ext2fs_allocate_inode_bitmap(ext2_filsys fs,
52				       const char *descr,
53				       ext2fs_inode_bitmap *ret)
54{
55	errcode_t	retval;
56	__u32		start, end, real_end;
57
58	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
59
60	fs->write_bitmaps = ext2fs_write_bitmaps;
61
62	start = 1;
63	end = fs->super->s_inodes_count;
64	real_end = (EXT2_INODES_PER_GROUP(fs->super) * fs->group_desc_count);
65
66	return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP, fs,
67					   start, end, real_end,
68					   descr, 0, ret));
69}
70
71errcode_t ext2fs_allocate_block_bitmap(ext2_filsys fs,
72				       const char *descr,
73				       ext2fs_block_bitmap *ret)
74{
75	errcode_t	retval;
76	__u32		start, end, real_end;
77
78	EXT2_CHECK_MAGIC(fs, EXT2_ET_MAGIC_EXT2FS_FILSYS);
79
80	fs->write_bitmaps = ext2fs_write_bitmaps;
81
82	start = fs->super->s_first_data_block;
83	end = fs->super->s_blocks_count-1;
84	real_end = (EXT2_BLOCKS_PER_GROUP(fs->super)
85		    * fs->group_desc_count)-1 + start;
86
87	return (ext2fs_make_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP, fs,
88					   start, end, real_end,
89					   descr, 0, ret));
90}
91
92errcode_t ext2fs_fudge_inode_bitmap_end(ext2fs_inode_bitmap bitmap,
93					ext2_ino_t end, ext2_ino_t *oend)
94{
95
96	return (ext2fs_fudge_generic_bitmap_end(bitmap,
97						EXT2_ET_MAGIC_INODE_BITMAP,
98						EXT2_ET_FUDGE_INODE_BITMAP_END,
99						end, oend));
100}
101
102errcode_t ext2fs_fudge_block_bitmap_end(ext2fs_block_bitmap bitmap,
103					blk_t end, blk_t *oend)
104{
105	return (ext2fs_fudge_generic_bitmap_end(bitmap,
106						EXT2_ET_MAGIC_BLOCK_BITMAP,
107						EXT2_ET_FUDGE_BLOCK_BITMAP_END,
108						end, oend));
109}
110
111void ext2fs_clear_inode_bitmap(ext2fs_inode_bitmap bitmap)
112{
113	ext2fs_clear_generic_bitmap(bitmap);
114}
115
116void ext2fs_clear_block_bitmap(ext2fs_block_bitmap bitmap)
117{
118	ext2fs_clear_generic_bitmap(bitmap);
119}
120
121errcode_t ext2fs_resize_inode_bitmap(__u32 new_end, __u32 new_real_end,
122				     ext2fs_inode_bitmap bmap)
123{
124	return (ext2fs_resize_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP,
125					     new_end, new_real_end, bmap));
126}
127
128errcode_t ext2fs_resize_block_bitmap(__u32 new_end, __u32 new_real_end,
129				     ext2fs_block_bitmap bmap)
130{
131	return (ext2fs_resize_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP,
132					     new_end, new_real_end, bmap));
133}
134
135errcode_t ext2fs_compare_block_bitmap(ext2fs_block_bitmap bm1,
136				      ext2fs_block_bitmap bm2)
137{
138	return (ext2fs_compare_generic_bitmap(EXT2_ET_MAGIC_BLOCK_BITMAP,
139					      EXT2_ET_NEQ_BLOCK_BITMAP,
140					      bm1, bm2));
141}
142
143errcode_t ext2fs_compare_inode_bitmap(ext2fs_inode_bitmap bm1,
144				      ext2fs_inode_bitmap bm2)
145{
146	return (ext2fs_compare_generic_bitmap(EXT2_ET_MAGIC_INODE_BITMAP,
147					      EXT2_ET_NEQ_INODE_BITMAP,
148					      bm1, bm2));
149}
150
151