LU-5971 llite: merge lclient.h into llite/vvp_internal.h

[fs/lustre-release.git] / lustre / include / cl_object.h

diff --git a/lustre/include/cl_object.h b/lustre/include/cl_object.h
index c2c3b2d..db7576c 100644 (file)
--- a/lustre/include/cl_object.h
+++ b/lustre/include/cl_object.h
@@ -98,8 +98,11 @@
  */
 #include <libcfs/libcfs.h>
 #include <lu_object.h>
+#include <linux/atomic.h>
 #include <linux/mutex.h>
 #include <linux/radix-tree.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
 
 struct inode;
 
@@ -2402,6 +2405,52 @@ void cl_lock_descr_print(const struct lu_env *env, void *cookie,
                         const struct cl_lock_descr *descr);
 /* @} helper */
 
+/**
+ * Data structure managing a client's cached pages. A count of
+ * "unstable" pages is maintained, and an LRU of clean pages is
+ * maintained. "unstable" pages are pages pinned by the ptlrpc
+ * layer for recovery purposes.
+ */
+struct cl_client_cache {
+       /**
+        * # of users (OSCs)
+        */
+       atomic_t                ccc_users;
+       /**
+        * # of threads are doing shrinking
+        */
+       unsigned int            ccc_lru_shrinkers;
+       /**
+        * # of LRU entries available
+        */
+       atomic_long_t           ccc_lru_left;
+       /**
+        * List of entities(OSCs) for this LRU cache
+        */
+       struct list_head        ccc_lru;
+       /**
+        * Max # of LRU entries
+        */
+       unsigned long           ccc_lru_max;
+       /**
+        * Lock to protect ccc_lru list
+        */
+       spinlock_t              ccc_lru_lock;
+       /**
+        * Set if unstable check is enabled
+        */
+       unsigned int            ccc_unstable_check:1;
+       /**
+        * # of unstable pages for this mount point
+        */
+       atomic_long_t           ccc_unstable_nr;
+       /**
+        * Waitq for awaiting unstable pages to reach zero.
+        * Used at umounting time and signaled on BRW commit
+        */
+       wait_queue_head_t       ccc_unstable_waitq;
+};
+
 /** @} cl_page */
 
 /** \defgroup cl_lock cl_lock