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ocfs2: fix wrong check in ocfs2_direct_IO_get_blocks

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contig_blocks gotten from ocfs2_extent_map_get_blocks cannot be compared
with clusters_to_alloc. So convert it to clusters first.

Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Reviewed-by: Weiwei Wang <wangww631@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joseph Qi
2015-06-24 16:55:23 -07:00
committed by Linus Torvalds
parent 74e364ad1b
commit ae1f081467
2 changed files with 15 additions and 3 deletions
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10
fs/ocfs2/ocfs2.h
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@@ -717,6 +717,16 @@ static inline u64 ocfs2_clusters_to_blocks(struct super_block *sb,
return (u64)clusters << c_to_b_bits;
}
static inline u32 ocfs2_clusters_for_blocks(struct super_block *sb,
u64 blocks)
{
int b_to_c_bits = OCFS2_SB(sb)->s_clustersize_bits -
sb->s_blocksize_bits;
blocks += (1 << b_to_c_bits) - 1;
return (u32)(blocks >> b_to_c_bits);
}
static inline u32 ocfs2_blocks_to_clusters(struct super_block *sb,
u64 blocks)
{