e44be73286
commit952fc18ef9upstream. Commitf975d6bcc7introduced bug which caused ext4_statfs() to miscalculate the number of file system overhead blocks. This causes the f_blocks field in the statfs structure to be larger than it should be. This would in turn cause the "df" output to show the number of data blocks in the file system and the number of data blocks used to be larger than they should be. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> [bwh: Backported to 3.2: adjust context] Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
26 lines
577 B
C
26 lines
577 B
C
/*
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* linux/fs/ext4/bitmap.c
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*/
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#include <linux/buffer_head.h>
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#include <linux/jbd2.h>
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#include "ext4.h"
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static const int nibblemap[] = {4, 3, 3, 2, 3, 2, 2, 1, 3, 2, 2, 1, 2, 1, 1, 0};
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unsigned int ext4_count_free(char *bitmap, unsigned int numchars)
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{
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unsigned int i, sum = 0;
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for (i = 0; i < numchars; i++)
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sum += nibblemap[bitmap[i] & 0xf] +
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nibblemap[(bitmap[i] >> 4) & 0xf];
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return sum;
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}
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