Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / fs / nfs / cache_lib.h

diff --git a/kernel/fs/nfs/cache_lib.h b/kernel/fs/nfs/cache_lib.h
new file mode 100644 (file)
index 0000000..4116d2c
--- /dev/null
+++ b/kernel/fs/nfs/cache_lib.h
@@ -0,0 +1,31 @@
+/*
+ * Helper routines for the NFS client caches
+ *
+ * Copyright (c) 2009 Trond Myklebust <Trond.Myklebust@netapp.com>
+ */
+
+#include <linux/completion.h>
+#include <linux/sunrpc/cache.h>
+#include <linux/atomic.h>
+
+/*
+ * Deferred request handling
+ */
+struct nfs_cache_defer_req {
+       struct cache_req req;
+       struct cache_deferred_req deferred_req;
+       struct completion completion;
+       atomic_t count;
+};
+
+extern int nfs_cache_upcall(struct cache_detail *cd, char *entry_name);
+extern struct nfs_cache_defer_req *nfs_cache_defer_req_alloc(void);
+extern void nfs_cache_defer_req_put(struct nfs_cache_defer_req *dreq);
+extern int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq);
+
+extern int nfs_cache_register_net(struct net *net, struct cache_detail *cd);
+extern void nfs_cache_unregister_net(struct net *net, struct cache_detail *cd);
+extern int nfs_cache_register_sb(struct super_block *sb,
+                                struct cache_detail *cd);
+extern void nfs_cache_unregister_sb(struct super_block *sb,
+                                   struct cache_detail *cd);