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_H 9 #define _SIW_CM_H 10 11 #include <net/sock.h> 12 #include <linux/tcp.h> 13 14 #include <rdma/iw_cm.h> 15 16 enum 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_CLOSED 25 }; 26 27 struct 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 35 struct siw_device; 36 37 struct 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 an 70 * MPA reply after sending out MPA request. Reponder waits for 71 * 5 seconds for MPA request to arrive if new TCP connection 72 * was set up. 73 */ 74 #define MPAREQ_TIMEOUT (HZ * 10) 75 #define MPAREP_TIMEOUT (HZ * 5) 76 77 enum 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_MPATIMEOUT 83 }; 84 85 struct 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 95 static inline int getname_peer(struct socket *s, struct sockaddr_storage *a) 96 { 97 return s->ops->getname(s, (struct sockaddr *)a, 1); 98 } 99 100 static inline int getname_local(struct socket *s, struct sockaddr_storage *a) 101 { 102 return s->ops->getname(s, (struct sockaddr *)a, 0); 103 } 104 105 static 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 } 113 114 int siw_connect(struct iw_cm_id *id, struct iw_cm_conn_param *parm); 115 int siw_accept(struct iw_cm_id *id, struct iw_cm_conn_param *param); 116 int siw_reject(struct iw_cm_id *id, const void *data, u8 len); 117 int siw_create_listen(struct iw_cm_id *id, int backlog); 118 int siw_destroy_listen(struct iw_cm_id *id); 119 120 void siw_cep_get(struct siw_cep *cep); 121 void siw_cep_put(struct siw_cep *cep); 122 int siw_cm_queue_work(struct siw_cep *cep, enum siw_work_type type); 123 124 int siw_cm_init(void); 125 void siw_cm_exit(void); 126 127 /* 128 * TCP socket interface 129 */ 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 #endif 134