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| author | Joseph Qi <joseph.qi@huawei.com> | 2015-06-24 16:55:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-06-24 17:49:40 -0700 |
| commit | ae1f081467a147c125dfd5920e1c55f0e8ad031a (patch) | |
| tree | dd06c72b531a5ac71db4e67501b3813d51df0442 /fs/ocfs2/ocfs2.h | |
| parent | 74e364ad1b13fd518a0bd4e5aec56d5e8706152f (diff) | |
| download | linux-0-day-ae1f081467a147c125dfd5920e1c55f0e8ad031a.tar.gz linux-0-day-ae1f081467a147c125dfd5920e1c55f0e8ad031a.tar.xz | |
ocfs2: fix wrong check in ocfs2_direct_IO_get_blocks
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>
Diffstat (limited to 'fs/ocfs2/ocfs2.h')
| -rw-r--r-- | fs/ocfs2/ocfs2.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index 460c6c37e683f..690ddc60189b5 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -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) { |