66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
/*
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* Shared Memory Communications over RDMA (SMC-R) and RoCE
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*
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* Definitions for the SMC module (socket related)
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*
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* Copyright IBM Corp. 2016
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*
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* Author(s): Ursula Braun <ubraun@linux.vnet.ibm.com>
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*/
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#ifndef __SMC_H
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#define __SMC_H
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#include <linux/socket.h>
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#include <linux/types.h>
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#include <net/sock.h>
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#define SMCPROTO_SMC 0 /* SMC protocol */
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#define SMC_MAX_PORTS 2 /* Max # of ports */
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enum smc_state { /* possible states of an SMC socket */
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SMC_ACTIVE = 1,
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SMC_INIT = 2,
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SMC_CLOSED = 7,
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SMC_LISTEN = 10,
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};
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struct smc_sock { /* smc sock container */
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struct sock sk;
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struct socket *clcsock; /* internal tcp socket */
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struct sockaddr *addr; /* inet connect address */
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struct smc_sock *listen_smc; /* listen parent */
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struct work_struct tcp_listen_work;/* handle tcp socket accepts */
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struct work_struct smc_listen_work;/* prepare new accept socket */
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struct list_head accept_q; /* sockets to be accepted */
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spinlock_t accept_q_lock; /* protects accept_q */
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bool use_fallback; /* fallback to tcp */
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};
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static inline struct smc_sock *smc_sk(const struct sock *sk)
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{
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return (struct smc_sock *)sk;
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}
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#define SMC_SYSTEMID_LEN 8
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extern u8 local_systemid[SMC_SYSTEMID_LEN]; /* unique system identifier */
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#ifdef CONFIG_XFRM
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static inline bool using_ipsec(struct smc_sock *smc)
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{
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return (smc->clcsock->sk->sk_policy[0] ||
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smc->clcsock->sk->sk_policy[1]) ? 1 : 0;
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}
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#else
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static inline bool using_ipsec(struct smc_sock *smc)
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{
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return 0;
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}
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#endif
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int smc_netinfo_by_tcpsk(struct socket *clcsock, __be32 *subnet,
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u8 *prefix_len);
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#endif /* __SMC_H */
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