1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
|
/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/*
* Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
* Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
*/
#ifndef IW_CM_H
#define IW_CM_H
#include <linux/in.h>
#include <rdma/ib_cm.h>
struct iw_cm_id;
enum iw_cm_event_type {
IW_CM_EVENT_CONNECT_REQUEST = 1, /* connect request received */
IW_CM_EVENT_CONNECT_REPLY, /* reply from active connect request */
IW_CM_EVENT_ESTABLISHED, /* passive side accept successful */
IW_CM_EVENT_DISCONNECT, /* orderly shutdown */
IW_CM_EVENT_CLOSE /* close complete */
};
struct iw_cm_event {
enum iw_cm_event_type event;
int status;
struct sockaddr_storage local_addr;
struct sockaddr_storage remote_addr;
void *private_data;
void *provider_data;
u8 private_data_len;
u8 ord;
u8 ird;
};
/**
* iw_cm_handler - Function to be called by the IW CM when delivering events
* to the client.
*
* @cm_id: The IW CM identifier associated with the event.
* @event: Pointer to the event structure.
*/
typedef int (*iw_cm_handler)(struct iw_cm_id *cm_id,
struct iw_cm_event *event);
/**
* iw_event_handler - Function called by the provider when delivering provider
* events to the IW CM. Returns either 0 indicating the event was processed
* or -errno if the event could not be processed.
*
* @cm_id: The IW CM identifier associated with the event.
* @event: Pointer to the event structure.
*/
typedef int (*iw_event_handler)(struct iw_cm_id *cm_id,
struct iw_cm_event *event);
struct iw_cm_id {
iw_cm_handler cm_handler; /* client callback function */
void *context; /* client cb context */
struct ib_device *device;
struct sockaddr_storage local_addr; /* local addr */
struct sockaddr_storage remote_addr;
struct sockaddr_storage m_local_addr; /* nmapped local addr */
struct sockaddr_storage m_remote_addr; /* nmapped rem addr */
void *provider_data; /* provider private data */
iw_event_handler event_handler; /* cb for provider
events */
/* Used by provider to add and remove refs on IW cm_id */
void (*add_ref)(struct iw_cm_id *);
void (*rem_ref)(struct iw_cm_id *);
u8 tos;
bool tos_set:1;
bool mapped:1;
};
struct iw_cm_conn_param {
const void *private_data;
u16 private_data_len;
u32 ord;
u32 ird;
u32 qpn;
};
enum iw_flags {
/*
* This flag allows the iwcm and iwpmd to still advertise
* mappings but the real and mapped port numbers are the
* same. Further, iwpmd will not bind any user socket to
* reserve the port. This is required for soft iwarp
* to play in the port mapped iwarp space.
*/
IW_F_NO_PORT_MAP = (1 << 0),
};
/**
* iw_create_cm_id - Create an IW CM identifier.
*
* @device: The IB device on which to create the IW CM identier.
* @event_handler: User callback invoked to report events associated with the
* returned IW CM identifier.
* @context: User specified context associated with the id.
*/
struct iw_cm_id *iw_create_cm_id(struct ib_device *device,
iw_cm_handler cm_handler, void *context);
/**
* iw_destroy_cm_id - Destroy an IW CM identifier.
*
* @cm_id: The previously created IW CM identifier to destroy.
*
* The client can assume that no events will be delivered for the CM ID after
* this function returns.
*/
void iw_destroy_cm_id(struct iw_cm_id *cm_id);
/**
* iw_cm_bind_qp - Unbind the specified IW CM identifier and QP
*
* @cm_id: The IW CM idenfier to unbind from the QP.
* @qp: The QP
*
* This is called by the provider when destroying the QP to ensure
* that any references held by the IWCM are released. It may also
* be called by the IWCM when destroying a CM_ID to that any
* references held by the provider are released.
*/
void iw_cm_unbind_qp(struct iw_cm_id *cm_id, struct ib_qp *qp);
/**
* iw_cm_get_qp - Return the ib_qp associated with a QPN
*
* @ib_device: The IB device
* @qpn: The queue pair number
*/
struct ib_qp *iw_cm_get_qp(struct ib_device *device, int qpn);
/**
* iw_cm_listen - Listen for incoming connection requests on the
* specified IW CM id.
*
* @cm_id: The IW CM identifier.
* @backlog: The maximum number of outstanding un-accepted inbound listen
* requests to queue.
*
* The source address and port number are specified in the IW CM identifier
* structure.
*/
int iw_cm_listen(struct iw_cm_id *cm_id, int backlog);
/**
* iw_cm_accept - Called to accept an incoming connect request.
*
* @cm_id: The IW CM identifier associated with the connection request.
* @iw_param: Pointer to a structure containing connection establishment
* parameters.
*
* The specified cm_id will have been provided in the event data for a
* CONNECT_REQUEST event. Subsequent events related to this connection will be
* delivered to the specified IW CM identifier prior and may occur prior to
* the return of this function. If this function returns a non-zero value, the
* client can assume that no events will be delivered to the specified IW CM
* identifier.
*/
int iw_cm_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
/**
* iw_cm_reject - Reject an incoming connection request.
*
* @cm_id: Connection identifier associated with the request.
* @private_daa: Pointer to data to deliver to the remote peer as part of the
* reject message.
* @private_data_len: The number of bytes in the private_data parameter.
*
* The client can assume that no events will be delivered to the specified IW
* CM identifier following the return of this function. The private_data
* buffer is available for reuse when this function returns.
*/
int iw_cm_reject(struct iw_cm_id *cm_id, const void *private_data,
u8 private_data_len);
/**
* iw_cm_connect - Called to request a connection to a remote peer.
*
* @cm_id: The IW CM identifier for the connection.
* @iw_param: Pointer to a structure containing connection establishment
* parameters.
*
* Events may be delivered to the specified IW CM identifier prior to the
* return of this function. If this function returns a non-zero value, the
* client can assume that no events will be delivered to the specified IW CM
* identifier.
*/
int iw_cm_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
/**
* iw_cm_disconnect - Close the specified connection.
*
* @cm_id: The IW CM identifier to close.
* @abrupt: If 0, the connection will be closed gracefully, otherwise, the
* connection will be reset.
*
* The IW CM identifier is still active until the IW_CM_EVENT_CLOSE event is
* delivered.
*/
int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt);
/**
* iw_cm_init_qp_attr - Called to initialize the attributes of the QP
* associated with a IW CM identifier.
*
* @cm_id: The IW CM identifier associated with the QP
* @qp_attr: Pointer to the QP attributes structure.
* @qp_attr_mask: Pointer to a bit vector specifying which QP attributes are
* valid.
*/
int iw_cm_init_qp_attr(struct iw_cm_id *cm_id, struct ib_qp_attr *qp_attr,
int *qp_attr_mask);
/**
* iwcm_reject_msg - return a pointer to a reject message string.
* @reason: Value returned in the REJECT event status field.
*/
const char *__attribute_const__ iwcm_reject_msg(int reason);
#endif /* IW_CM_H */
|
