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authorMark Fasheh <mark.fasheh@oracle.com>2007-01-16 11:32:23 -0800
committerMark Fasheh <mark.fasheh@oracle.com>2007-04-26 14:44:03 -0700
commitdcd0538ff4e854fa9d7f4630b359ca8fdb5cb5a8 (patch)
tree226d725f8199907cea2433d1d183b01e51d9bc55 /fs/ocfs2/ocfs2.h
parent6f16bf655c5795586dd2ac96a7c70e0b9a378746 (diff)
downloadop-kernel-dev-dcd0538ff4e854fa9d7f4630b359ca8fdb5cb5a8.zip
op-kernel-dev-dcd0538ff4e854fa9d7f4630b359ca8fdb5cb5a8.tar.gz
ocfs2: sparse b-tree support
Introduce tree rotations into the b-tree code. This will allow ocfs2 to support sparse files. Much of the added code is designed to be generic (in the ocfs2 sense) so that it can later be re-used to implement large extended attributes. This patch only adds the rotation code and does minimal updates to callers of the extent api. Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Diffstat (limited to 'fs/ocfs2/ocfs2.h')
-rw-r--r--fs/ocfs2/ocfs2.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index db8e77c..fe7e1ec 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -303,6 +303,13 @@ static inline int ocfs2_should_order_data(struct inode *inode)
return 1;
}
+static inline int ocfs2_sparse_alloc(struct ocfs2_super *osb)
+{
+ if (osb->s_feature_incompat & OCFS2_FEATURE_INCOMPAT_SPARSE_ALLOC)
+ return 1;
+ return 0;
+}
+
/* set / clear functions because cluster events can make these happen
* in parallel so we want the transitions to be atomic. this also
* means that any future flags osb_flags must be protected by spinlock
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