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authorJoel Becker <joel.becker@oracle.com>2010-04-13 14:26:32 +0800
committerTao Ma <tao.ma@oracle.com>2010-04-13 14:26:32 +0800
commit798db35f4649eac2778381c390ed7d12de9ec767 (patch)
tree988c30bd86d4913c2f9187bb8504135ec0b80f62 /fs/ocfs2/ocfs2_fs.h
parent4cbe4249d6586d5d88ef271e07302407a14c8443 (diff)
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ocfs2: Allocate discontiguous block groups.
If we cannot get a contiguous region for a block group, allocate a discontiguous one when the filesystem supports it. Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to 'fs/ocfs2/ocfs2_fs.h')
-rw-r--r--fs/ocfs2/ocfs2_fs.h20
1 files changed, 20 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index 448aa8d11a97..888ba4ec42c6 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -1278,6 +1278,16 @@ static inline u16 ocfs2_extent_recs_per_eb(struct super_block *sb)
return size / sizeof(struct ocfs2_extent_rec);
}
+static inline u16 ocfs2_extent_recs_per_gd(struct super_block *sb)
+{
+ int size;
+
+ size = sb->s_blocksize -
+ offsetof(struct ocfs2_group_desc, bg_list.l_recs);
+
+ return size / sizeof(struct ocfs2_extent_rec);
+}
+
static inline int ocfs2_dx_entries_per_leaf(struct super_block *sb)
{
int size;
@@ -1430,6 +1440,16 @@ static inline int ocfs2_extent_recs_per_eb(int blocksize)
return size / sizeof(struct ocfs2_extent_rec);
}
+static inline int ocfs2_extent_recs_per_gd(int blocksize)
+{
+ int size;
+
+ size = blocksize -
+ offsetof(struct ocfs2_group_desc, bg_list.l_recs);
+
+ return size / sizeof(struct ocfs2_extent_rec);
+}
+
static inline int ocfs2_local_alloc_size(int blocksize)
{
int size;