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authorUrsula Braun <ubraun@linux.vnet.ibm.com>2017-01-09 16:55:13 +0100
committerDavid S. Miller <davem@davemloft.net>2017-01-09 16:07:38 -0500
commitac7138746e14137a451f8539614cdd349153e0c0 (patch)
tree17670ecbfbf96d8270c1a11ef4a00edd140e1541 /net/smc/smc.h
parent4b9d07a44015a0e940448fa3885b894349e8b162 (diff)
downloadop-kernel-dev-ac7138746e14137a451f8539614cdd349153e0c0.zip
op-kernel-dev-ac7138746e14137a451f8539614cdd349153e0c0.tar.gz
smc: establish new socket family
* enable smc module loading and unloading * register new socket family * basic smc socket creation and deletion * use backing TCP socket to run CLC (Connection Layer Control) handshake of SMC protocol * Setup for infiniband traffic is implemented in follow-on patches. For now fallback to TCP socket is always used. Signed-off-by: Ursula Braun <ubraun@linux.vnet.ibm.com> Reviewed-by: Utz Bacher <utz.bacher@de.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/smc/smc.h')
-rw-r--r--net/smc/smc.h37
1 files changed, 37 insertions, 0 deletions
diff --git a/net/smc/smc.h b/net/smc/smc.h
new file mode 100644
index 0000000..fcea739
--- /dev/null
+++ b/net/smc/smc.h
@@ -0,0 +1,37 @@
+/*
+ * Shared Memory Communications over RDMA (SMC-R) and RoCE
+ *
+ * Definitions for the SMC module (socket related)
+ *
+ * Copyright IBM Corp. 2016
+ *
+ * Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
+ */
+#ifndef __SMC_H
+#define __SMC_H
+
+#include <linux/socket.h>
+#include <linux/types.h>
+#include <net/sock.h>
+
+#define SMCPROTO_SMC 0 /* SMC protocol */
+
+enum smc_state { /* possible states of an SMC socket */
+ SMC_ACTIVE = 1,
+ SMC_INIT = 2,
+ SMC_CLOSED = 7,
+ SMC_LISTEN = 10,
+};
+
+struct smc_sock { /* smc sock container */
+ struct sock sk;
+ struct socket *clcsock; /* internal tcp socket */
+ bool use_fallback; /* fallback to tcp */
+};
+
+static inline struct smc_sock *smc_sk(const struct sock *sk)
+{
+ return (struct smc_sock *)sk;
+}
+
+#endif /* __SMC_H */
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