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-rw-r--r--fs/ocfs2/ocfs2.h23
1 files changed, 21 insertions, 2 deletions
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 39e1d5a39505..eef3bd077c10 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -51,17 +51,36 @@
/* For struct ocfs2_blockcheck_stats */
#include "blockcheck.h"
+
+/* Caching of metadata buffers */
+
/* Most user visible OCFS2 inodes will have very few pieces of
* metadata, but larger files (including bitmaps, etc) must be taken
* into account when designing an access scheme. We allow a small
* amount of inlined blocks to be stored on an array and grow the
* structure into a rb tree when necessary. */
-#define OCFS2_INODE_MAX_CACHE_ARRAY 2
+#define OCFS2_CACHE_INFO_MAX_ARRAY 2
+
+/* Flags for ocfs2_caching_info */
+
+enum ocfs2_caching_info_flags {
+ /* Indicates that the metadata cache is using the inline array */
+ OCFS2_CACHE_FL_INLINE = 1<<1,
+};
struct ocfs2_caching_info {
+ /*
+ * The parent structure provides the locks, but because the
+ * parent structure can differ, struct ocfs2_caching_info needs
+ * its own pointers to them.
+ */
+ spinlock_t *ci_lock;
+ struct mutex *ci_io_mutex;
+
+ unsigned int ci_flags;
unsigned int ci_num_cached;
union {
- sector_t ci_array[OCFS2_INODE_MAX_CACHE_ARRAY];
+ sector_t ci_array[OCFS2_CACHE_INFO_MAX_ARRAY];
struct rb_root ci_tree;
} ci_cache;
};