| /* |
| * 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> |
| |
| #include "smc_ib.h" |
| |
| #define SMCPROTO_SMC 0 /* SMC protocol */ |
| |
| #define SMC_MAX_PORTS 2 /* Max # of ports */ |
| |
| enum smc_state { /* possible states of an SMC socket */ |
| SMC_ACTIVE = 1, |
| SMC_INIT = 2, |
| SMC_CLOSED = 7, |
| SMC_LISTEN = 10, |
| }; |
| |
| struct smc_link_group; |
| |
| struct smc_connection { |
| struct rb_node alert_node; |
| struct smc_link_group *lgr; /* link group of connection */ |
| u32 alert_token_local; /* unique conn. id */ |
| u8 peer_conn_idx; /* from tcp handshake */ |
| }; |
| |
| struct smc_sock { /* smc sock container */ |
| struct sock sk; |
| struct socket *clcsock; /* internal tcp socket */ |
| struct smc_connection conn; /* smc connection */ |
| struct sockaddr *addr; /* inet connect address */ |
| struct smc_sock *listen_smc; /* listen parent */ |
| struct work_struct tcp_listen_work;/* handle tcp socket accepts */ |
| struct work_struct smc_listen_work;/* prepare new accept socket */ |
| struct list_head accept_q; /* sockets to be accepted */ |
| spinlock_t accept_q_lock; /* protects accept_q */ |
| bool use_fallback; /* fallback to tcp */ |
| }; |
| |
| static inline struct smc_sock *smc_sk(const struct sock *sk) |
| { |
| return (struct smc_sock *)sk; |
| } |
| |
| #define SMC_SYSTEMID_LEN 8 |
| |
| extern u8 local_systemid[SMC_SYSTEMID_LEN]; /* unique system identifier */ |
| |
| /* convert an u32 value into network byte order, store it into a 3 byte field */ |
| static inline void hton24(u8 *net, u32 host) |
| { |
| __be32 t; |
| |
| t = cpu_to_be32(host); |
| memcpy(net, ((u8 *)&t) + 1, 3); |
| } |
| |
| /* convert a received 3 byte field into host byte order*/ |
| static inline u32 ntoh24(u8 *net) |
| { |
| __be32 t = 0; |
| |
| memcpy(((u8 *)&t) + 1, net, 3); |
| return be32_to_cpu(t); |
| } |
| |
| #ifdef CONFIG_XFRM |
| static inline bool using_ipsec(struct smc_sock *smc) |
| { |
| return (smc->clcsock->sk->sk_policy[0] || |
| smc->clcsock->sk->sk_policy[1]) ? 1 : 0; |
| } |
| #else |
| static inline bool using_ipsec(struct smc_sock *smc) |
| { |
| return 0; |
| } |
| #endif |
| |
| struct smc_clc_msg_local; |
| |
| int smc_netinfo_by_tcpsk(struct socket *clcsock, __be32 *subnet, |
| u8 *prefix_len); |
| void smc_conn_free(struct smc_connection *conn); |
| int smc_conn_create(struct smc_sock *smc, __be32 peer_in_addr, |
| struct smc_ib_device *smcibdev, u8 ibport, |
| struct smc_clc_msg_local *lcl, int srv_first_contact); |
| |
| #endif /* __SMC_H */ |