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-rw-r--r--include/linux/sunrpc/xprt.h19
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
index c090df442572..6f9457a75b8f 100644
--- a/include/linux/sunrpc/xprt.h
+++ b/include/linux/sunrpc/xprt.h
@@ -124,6 +124,23 @@ struct rpc_xprt_ops {
void (*print_stats)(struct rpc_xprt *xprt, struct seq_file *seq);
};
+/*
+ * RPC transport identifiers
+ *
+ * To preserve compatibility with the historical use of raw IP protocol
+ * id's for transport selection, UDP and TCP identifiers are specified
+ * with the previous values. No such restriction exists for new transports,
+ * except that they may not collide with these values (17 and 6,
+ * respectively).
+ */
+#define XPRT_TRANSPORT_BC (1 << 31)
+enum xprt_transports {
+ XPRT_TRANSPORT_UDP = IPPROTO_UDP,
+ XPRT_TRANSPORT_TCP = IPPROTO_TCP,
+ XPRT_TRANSPORT_BC_TCP = IPPROTO_TCP | XPRT_TRANSPORT_BC,
+ XPRT_TRANSPORT_RDMA = 256
+};
+
struct rpc_xprt {
struct kref kref; /* Reference count */
struct rpc_xprt_ops * ops; /* transport methods */
@@ -179,6 +196,7 @@ struct rpc_xprt {
spinlock_t reserve_lock; /* lock slot table */
u32 xid; /* Next XID value to use */
struct rpc_task * snd_task; /* Task blocked in send */
+ struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
#if defined(CONFIG_NFS_V4_1)
struct svc_serv *bc_serv; /* The RPC service which will */
/* process the callback */
@@ -231,6 +249,7 @@ struct xprt_create {
struct sockaddr * srcaddr; /* optional local address */
struct sockaddr * dstaddr; /* remote peer address */
size_t addrlen;
+ struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
};
struct xprt_class {