134 lines
3.3 KiB
C
134 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
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/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */
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/* Greg Joyce <greg@opengridcomputing.com> */
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/* Copyright (c) 2008-2019, IBM Corporation */
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/* Copyright (c) 2017, Open Grid Computing, Inc. */
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#ifndef _SIW_CM_H
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#define _SIW_CM_H
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#include <net/sock.h>
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#include <linux/tcp.h>
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#include <rdma/iw_cm.h>
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enum siw_cep_state {
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SIW_EPSTATE_IDLE = 1,
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SIW_EPSTATE_LISTENING,
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SIW_EPSTATE_CONNECTING,
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SIW_EPSTATE_AWAIT_MPAREQ,
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SIW_EPSTATE_RECVD_MPAREQ,
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SIW_EPSTATE_AWAIT_MPAREP,
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SIW_EPSTATE_RDMA_MODE,
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SIW_EPSTATE_CLOSED
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};
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struct siw_mpa_info {
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struct mpa_rr hdr; /* peer mpa hdr in host byte order */
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struct mpa_v2_data v2_ctrl;
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struct mpa_v2_data v2_ctrl_req;
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char *pdata;
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int bytes_rcvd;
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};
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struct siw_device;
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struct siw_cep {
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struct iw_cm_id *cm_id;
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struct siw_device *sdev;
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struct list_head devq;
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spinlock_t lock;
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struct kref ref;
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int in_use;
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wait_queue_head_t waitq;
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enum siw_cep_state state;
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struct list_head listenq;
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struct siw_cep *listen_cep;
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struct siw_qp *qp;
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struct socket *sock;
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struct siw_cm_work *mpa_timer;
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struct list_head work_freelist;
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struct siw_mpa_info mpa;
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int ord;
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int ird;
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bool enhanced_rdma_conn_est;
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/* Saved upcalls of socket */
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void (*sk_state_change)(struct sock *sk);
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void (*sk_data_ready)(struct sock *sk);
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void (*sk_write_space)(struct sock *sk);
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void (*sk_error_report)(struct sock *sk);
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};
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/*
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* Connection initiator waits 10 seconds to receive an
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* MPA reply after sending out MPA request. Reponder waits for
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* 5 seconds for MPA request to arrive if new TCP connection
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* was set up.
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*/
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#define MPAREQ_TIMEOUT (HZ * 10)
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#define MPAREP_TIMEOUT (HZ * 5)
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enum siw_work_type {
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SIW_CM_WORK_ACCEPT = 1,
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SIW_CM_WORK_READ_MPAHDR,
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SIW_CM_WORK_CLOSE_LLP, /* close socket */
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SIW_CM_WORK_PEER_CLOSE, /* socket indicated peer close */
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SIW_CM_WORK_MPATIMEOUT
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};
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struct siw_cm_work {
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struct delayed_work work;
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struct list_head list;
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enum siw_work_type type;
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struct siw_cep *cep;
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};
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#define to_sockaddr_in(a) (*(struct sockaddr_in *)(&(a)))
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#define to_sockaddr_in6(a) (*(struct sockaddr_in6 *)(&(a)))
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static inline int getname_peer(struct socket *s, struct sockaddr_storage *a)
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{
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return s->ops->getname(s, (struct sockaddr *)a, 1);
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}
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static inline int getname_local(struct socket *s, struct sockaddr_storage *a)
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{
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return s->ops->getname(s, (struct sockaddr *)a, 0);
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}
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static inline int ksock_recv(struct socket *sock, char *buf, size_t size,
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int flags)
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{
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struct kvec iov = { buf, size };
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struct msghdr msg = { .msg_name = NULL, .msg_flags = flags };
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return kernel_recvmsg(sock, &msg, &iov, 1, size, flags);
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}
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int siw_connect(struct iw_cm_id *id, struct iw_cm_conn_param *parm);
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int siw_accept(struct iw_cm_id *id, struct iw_cm_conn_param *param);
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int siw_reject(struct iw_cm_id *id, const void *data, u8 len);
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int siw_create_listen(struct iw_cm_id *id, int backlog);
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int siw_destroy_listen(struct iw_cm_id *id);
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void siw_cep_get(struct siw_cep *cep);
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void siw_cep_put(struct siw_cep *cep);
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int siw_cm_queue_work(struct siw_cep *cep, enum siw_work_type type);
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int siw_cm_init(void);
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void siw_cm_exit(void);
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/*
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* TCP socket interface
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*/
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#define sk_to_qp(sk) (((struct siw_cep *)((sk)->sk_user_data))->qp)
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#define sk_to_cep(sk) ((struct siw_cep *)((sk)->sk_user_data))
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#endif
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