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1/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */2 3/* Authors: Bernard Metzler <bmt@zurich.ibm.com> */4/* Greg Joyce <greg@opengridcomputing.com> */5/* Copyright (c) 2008-2019, IBM Corporation */6/* Copyright (c) 2017, Open Grid Computing, Inc. */7 8#ifndef _SIW_CM_H9#define _SIW_CM_H10 11#include <net/sock.h>12#include <linux/tcp.h>13 14#include <rdma/iw_cm.h>15 16enum siw_cep_state {17 SIW_EPSTATE_IDLE = 1,18 SIW_EPSTATE_LISTENING,19 SIW_EPSTATE_CONNECTING,20 SIW_EPSTATE_AWAIT_MPAREQ,21 SIW_EPSTATE_RECVD_MPAREQ,22 SIW_EPSTATE_AWAIT_MPAREP,23 SIW_EPSTATE_RDMA_MODE,24 SIW_EPSTATE_CLOSED25};26 27struct siw_mpa_info {28 struct mpa_rr hdr; /* peer mpa hdr in host byte order */29 struct mpa_v2_data v2_ctrl;30 struct mpa_v2_data v2_ctrl_req;31 char *pdata;32 int bytes_rcvd;33};34 35struct siw_device;36 37struct siw_cep {38 struct iw_cm_id *cm_id;39 struct siw_device *sdev;40 struct list_head devq;41 spinlock_t lock;42 struct kref ref;43 int in_use;44 wait_queue_head_t waitq;45 enum siw_cep_state state;46 47 struct list_head listenq;48 struct siw_cep *listen_cep;49 50 struct siw_qp *qp;51 struct socket *sock;52 53 struct siw_cm_work *mpa_timer;54 struct list_head work_freelist;55 56 struct siw_mpa_info mpa;57 int ord;58 int ird;59 bool enhanced_rdma_conn_est;60 61 /* Saved upcalls of socket */62 void (*sk_state_change)(struct sock *sk);63 void (*sk_data_ready)(struct sock *sk);64 void (*sk_write_space)(struct sock *sk);65 void (*sk_error_report)(struct sock *sk);66};67 68/*69 * Connection initiator waits 10 seconds to receive an70 * MPA reply after sending out MPA request. Reponder waits for71 * 5 seconds for MPA request to arrive if new TCP connection72 * was set up.73 */74#define MPAREQ_TIMEOUT (HZ * 10)75#define MPAREP_TIMEOUT (HZ * 5)76 77enum siw_work_type {78 SIW_CM_WORK_ACCEPT = 1,79 SIW_CM_WORK_READ_MPAHDR,80 SIW_CM_WORK_CLOSE_LLP, /* close socket */81 SIW_CM_WORK_PEER_CLOSE, /* socket indicated peer close */82 SIW_CM_WORK_MPATIMEOUT83};84 85struct siw_cm_work {86 struct delayed_work work;87 struct list_head list;88 enum siw_work_type type;89 struct siw_cep *cep;90};91 92#define to_sockaddr_in(a) (*(struct sockaddr_in *)(&(a)))93#define to_sockaddr_in6(a) (*(struct sockaddr_in6 *)(&(a)))94 95static inline int getname_peer(struct socket *s, struct sockaddr_storage *a)96{97 return s->ops->getname(s, (struct sockaddr *)a, 1);98}99 100static inline int getname_local(struct socket *s, struct sockaddr_storage *a)101{102 return s->ops->getname(s, (struct sockaddr *)a, 0);103}104 105static inline int ksock_recv(struct socket *sock, char *buf, size_t size,106 int flags)107{108 struct kvec iov = { buf, size };109 struct msghdr msg = { .msg_name = NULL, .msg_flags = flags };110 111 return kernel_recvmsg(sock, &msg, &iov, 1, size, flags);112}113 114int siw_connect(struct iw_cm_id *id, struct iw_cm_conn_param *parm);115int siw_accept(struct iw_cm_id *id, struct iw_cm_conn_param *param);116int siw_reject(struct iw_cm_id *id, const void *data, u8 len);117int siw_create_listen(struct iw_cm_id *id, int backlog);118int siw_destroy_listen(struct iw_cm_id *id);119 120void siw_cep_get(struct siw_cep *cep);121void siw_cep_put(struct siw_cep *cep);122int siw_cm_queue_work(struct siw_cep *cep, enum siw_work_type type);123 124int siw_cm_init(void);125void siw_cm_exit(void);126 127/*128 * TCP socket interface129 */130#define sk_to_qp(sk) (((struct siw_cep *)((sk)->sk_user_data))->qp)131#define sk_to_cep(sk) ((struct siw_cep *)((sk)->sk_user_data))132 133#endif134