1 files changed, 59 insertions, 0 deletions

diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index a923535d9c37..eb0f4a047938 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -26,6 +26,13 @@
 #include "super.h"
 #include "buffer_head_io.h"
 #include "blockcheck.h"
+#include "refcounttree.h"
+
+static inline struct ocfs2_refcount_tree *
+cache_info_to_refcount(struct ocfs2_caching_info *ci)
+{
+        return container_of(ci, struct ocfs2_refcount_tree, rf_ci);
+}
 
 static int ocfs2_validate_refcount_block(struct super_block *sb,
                                          struct buffer_head *bh)
@@ -97,3 +104,55 @@ static int ocfs2_read_refcount_block(struct ocfs2_caching_info *ci,
 
         return rc;
 }
+
+static u64 ocfs2_refcount_cache_owner(struct ocfs2_caching_info *ci)
+{
+        struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci);
+
+        return rf->rf_blkno;
+}
+
+static struct super_block *
+ocfs2_refcount_cache_get_super(struct ocfs2_caching_info *ci)
+{
+        struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci);
+
+        return rf->rf_sb;
+}
+
+static void ocfs2_refcount_cache_lock(struct ocfs2_caching_info *ci)
+{
+        struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci);
+
+        spin_lock(&rf->rf_lock);
+}
+
+static void ocfs2_refcount_cache_unlock(struct ocfs2_caching_info *ci)
+{
+        struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci);
+
+        spin_unlock(&rf->rf_lock);
+}
+
+static void ocfs2_refcount_cache_io_lock(struct ocfs2_caching_info *ci)
+{
+        struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci);
+
+        mutex_lock(&rf->rf_io_mutex);
+}
+
+static void ocfs2_refcount_cache_io_unlock(struct ocfs2_caching_info *ci)
+{
+        struct ocfs2_refcount_tree *rf = cache_info_to_refcount(ci);
+
+        mutex_unlock(&rf->rf_io_mutex);
+}
+
+static const struct ocfs2_caching_operations ocfs2_refcount_caching_ops = {
+        .co_owner               = ocfs2_refcount_cache_owner,
+        .co_get_super           = ocfs2_refcount_cache_get_super,
+        .co_cache_lock          = ocfs2_refcount_cache_lock,
+        .co_cache_unlock        = ocfs2_refcount_cache_unlock,
+        .co_io_lock             = ocfs2_refcount_cache_io_lock,
+        .co_io_unlock           = ocfs2_refcount_cache_io_unlock,
+};