Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / include / linux / ceph / msgpool.h

diff --git a/kernel/include/linux/ceph/msgpool.h b/kernel/include/linux/ceph/msgpool.h
new file mode 100644 (file)
index 0000000..4b0d389
--- /dev/null
+++ b/kernel/include/linux/ceph/msgpool.h
@@ -0,0 +1,26 @@
+#ifndef _FS_CEPH_MSGPOOL
+#define _FS_CEPH_MSGPOOL
+
+#include <linux/mempool.h>
+#include <linux/ceph/messenger.h>
+
+/*
+ * we use memory pools for preallocating messages we may receive, to
+ * avoid unexpected OOM conditions.
+ */
+struct ceph_msgpool {
+       const char *name;
+       mempool_t *pool;
+       int type;               /* preallocated message type */
+       int front_len;          /* preallocated payload size */
+};
+
+extern int ceph_msgpool_init(struct ceph_msgpool *pool, int type,
+                            int front_len, int size, bool blocking,
+                            const char *name);
+extern void ceph_msgpool_destroy(struct ceph_msgpool *pool);
+extern struct ceph_msg *ceph_msgpool_get(struct ceph_msgpool *,
+                                        int front_len);
+extern void ceph_msgpool_put(struct ceph_msgpool *, struct ceph_msg *);
+
+#endif