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authorTao Ma <tao.ma@oracle.com>2009-08-24 11:13:37 +0800
committerJoel Becker <joel.becker@oracle.com>2009-09-22 20:09:29 -0700
commit374a263e790c4de85844283c098810a92985f623 (patch)
treea72b1f072b973723ea1cf7def27608717cf1c033 /fs/ocfs2/ocfs2.h
parentc732eb16bf07f9bfb7fa72b6868462471273bdbd (diff)
ocfs2: Add refcount tree lock mechanism.
Implement locking around struct ocfs2_refcount_tree. This protects all read/write operations on refcount trees. ocfs2_refcount_tree has its own lock and its own caching_info, protecting buffers among multiple nodes. User must call ocfs2_lock_refcount_tree before his operation on the tree and unlock it after that. ocfs2_refcount_trees are referenced by the block number of the refcount tree root block, So we create an rb-tree on the ocfs2_super to look them up. Signed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to 'fs/ocfs2/ocfs2.h')
-rw-r--r--fs/ocfs2/ocfs2.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 6688d19e445..bb5357376ef 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -408,6 +408,10 @@ struct ocfs2_super
/* the group we used to allocate inodes. */
u64 osb_inode_alloc_group;
+
+ /* rb tree root for refcount lock. */
+ struct rb_root osb_rf_lock_tree;
+ struct ocfs2_refcount_tree *osb_ref_tree_lru;
};
#define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info)