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: &msg, vec: &iov, num: 1, len: 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 | |