bitmap.c (404c3bc30cb1361e1b3533643326ab472d24a618) bitmap.c (952fc18ef9ec707ebdc16c0786ec360295e5ff15)
1/*
2 * linux/fs/ext4/bitmap.c
3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 */
9
10#include <linux/buffer_head.h>
11#include <linux/jbd2.h>
12#include "ext4.h"
13
1/*
2 * linux/fs/ext4/bitmap.c
3 *
4 * Copyright (C) 1992, 1993, 1994, 1995
5 * Remy Card (card@masi.ibp.fr)
6 * Laboratoire MASI - Institut Blaise Pascal
7 * Universite Pierre et Marie Curie (Paris VI)
8 */
9
10#include <linux/buffer_head.h>
11#include <linux/jbd2.h>
12#include "ext4.h"
13
14#ifdef EXT4FS_DEBUG
15
16static const int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
17
14static const int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
15
18unsigned int ext4_count_free(struct buffer_head *map, unsigned int numchars)
16unsigned int ext4_count_free(char *bitmap, unsigned int numchars)
19{
20 unsigned int i, sum = 0;
21
17{
18 unsigned int i, sum = 0;
19
22 if (!map)
23 return 0;
24 for (i = 0; i < numchars; i++)
20 for (i = 0; i < numchars; i++)
25 sum += nibblemap[map->b_data[i] & 0xf] +
26 nibblemap[(map->b_data[i] >> 4) & 0xf];
21 sum += nibblemap[bitmap[i] & 0xf] +
22 nibblemap[(bitmap[i] >> 4) & 0xf];
27 return sum;
28}
29
23 return sum;
24}
25
30#endif /* EXT4FS_DEBUG */
31
32int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
33 struct ext4_group_desc *gdp,
34 struct buffer_head *bh, int sz)
35{
36 __u32 hi;
37 __u32 provided, calculated;
38 struct ext4_sb_info *sbi = EXT4_SB(sb);
39

--- 75 unchanged lines hidden --- 		26int ext4_inode_bitmap_csum_verify(struct super_block *sb, ext4_group_t group,
27 struct ext4_group_desc *gdp,
28 struct buffer_head *bh, int sz)
29{
30 __u32 hi;
31 __u32 provided, calculated;
32 struct ext4_sb_info *sbi = EXT4_SB(sb);
33

--- 75 unchanged lines hidden ---