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TOMOYO Linux Cross Reference
Linux/include/rdma/iw_cm.h

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  1 /*
  2  * Copyright (c) 2005 Network Appliance, Inc. All rights reserved.
  3  * Copyright (c) 2005 Open Grid Computing, Inc. All rights reserved.
  4  *
  5  * This software is available to you under a choice of one of two
  6  * licenses.  You may choose to be licensed under the terms of the GNU
  7  * General Public License (GPL) Version 2, available from the file
  8  * COPYING in the main directory of this source tree, or the
  9  * OpenIB.org BSD license below:
 10  *
 11  *     Redistribution and use in source and binary forms, with or
 12  *     without modification, are permitted provided that the following
 13  *     conditions are met:
 14  *
 15  *      - Redistributions of source code must retain the above
 16  *        copyright notice, this list of conditions and the following
 17  *        disclaimer.
 18  *
 19  *      - Redistributions in binary form must reproduce the above
 20  *        copyright notice, this list of conditions and the following
 21  *        disclaimer in the documentation and/or other materials
 22  *        provided with the distribution.
 23  *
 24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 31  * SOFTWARE.
 32  */
 33 #ifndef IW_CM_H
 34 #define IW_CM_H
 35 
 36 #include <linux/in.h>
 37 #include <rdma/ib_cm.h>
 38 
 39 struct iw_cm_id;
 40 
 41 enum iw_cm_event_type {
 42         IW_CM_EVENT_CONNECT_REQUEST = 1, /* connect request received */
 43         IW_CM_EVENT_CONNECT_REPLY,       /* reply from active connect request */
 44         IW_CM_EVENT_ESTABLISHED,         /* passive side accept successful */
 45         IW_CM_EVENT_DISCONNECT,          /* orderly shutdown */
 46         IW_CM_EVENT_CLOSE                /* close complete */
 47 };
 48 
 49 struct iw_cm_event {
 50         enum iw_cm_event_type event;
 51         int                      status;
 52         struct sockaddr_storage local_addr;
 53         struct sockaddr_storage remote_addr;
 54         void *private_data;
 55         void *provider_data;
 56         u8 private_data_len;
 57         u8 ord;
 58         u8 ird;
 59 };
 60 
 61 /**
 62  * iw_cm_handler - Function to be called by the IW CM when delivering events
 63  * to the client.
 64  *
 65  * @cm_id: The IW CM identifier associated with the event.
 66  * @event: Pointer to the event structure.
 67  */
 68 typedef int (*iw_cm_handler)(struct iw_cm_id *cm_id,
 69                              struct iw_cm_event *event);
 70 
 71 /**
 72  * iw_event_handler - Function called by the provider when delivering provider
 73  * events to the IW CM.  Returns either 0 indicating the event was processed
 74  * or -errno if the event could not be processed.
 75  *
 76  * @cm_id: The IW CM identifier associated with the event.
 77  * @event: Pointer to the event structure.
 78  */
 79 typedef int (*iw_event_handler)(struct iw_cm_id *cm_id,
 80                                  struct iw_cm_event *event);
 81 
 82 struct iw_cm_id {
 83         iw_cm_handler           cm_handler;      /* client callback function */
 84         void                    *context;        /* client cb context */
 85         struct ib_device        *device;
 86         struct sockaddr_storage local_addr;
 87         struct sockaddr_storage remote_addr;
 88         void                    *provider_data;  /* provider private data */
 89         iw_event_handler        event_handler;   /* cb for provider
 90                                                     events */
 91         /* Used by provider to add and remove refs on IW cm_id */
 92         void (*add_ref)(struct iw_cm_id *);
 93         void (*rem_ref)(struct iw_cm_id *);
 94         u8  tos;
 95 };
 96 
 97 struct iw_cm_conn_param {
 98         const void *private_data;
 99         u16 private_data_len;
100         u32 ord;
101         u32 ird;
102         u32 qpn;
103 };
104 
105 struct iw_cm_verbs {
106         void            (*add_ref)(struct ib_qp *qp);
107 
108         void            (*rem_ref)(struct ib_qp *qp);
109 
110         struct ib_qp *  (*get_qp)(struct ib_device *device,
111                                   int qpn);
112 
113         int             (*connect)(struct iw_cm_id *cm_id,
114                                    struct iw_cm_conn_param *conn_param);
115 
116         int             (*accept)(struct iw_cm_id *cm_id,
117                                   struct iw_cm_conn_param *conn_param);
118 
119         int             (*reject)(struct iw_cm_id *cm_id,
120                                   const void *pdata, u8 pdata_len);
121 
122         int             (*create_listen)(struct iw_cm_id *cm_id,
123                                          int backlog);
124 
125         int             (*destroy_listen)(struct iw_cm_id *cm_id);
126 };
127 
128 /**
129  * iw_create_cm_id - Create an IW CM identifier.
130  *
131  * @device: The IB device on which to create the IW CM identier.
132  * @event_handler: User callback invoked to report events associated with the
133  *   returned IW CM identifier.
134  * @context: User specified context associated with the id.
135  */
136 struct iw_cm_id *iw_create_cm_id(struct ib_device *device,
137                                  iw_cm_handler cm_handler, void *context);
138 
139 /**
140  * iw_destroy_cm_id - Destroy an IW CM identifier.
141  *
142  * @cm_id: The previously created IW CM identifier to destroy.
143  *
144  * The client can assume that no events will be delivered for the CM ID after
145  * this function returns.
146  */
147 void iw_destroy_cm_id(struct iw_cm_id *cm_id);
148 
149 /**
150  * iw_cm_bind_qp - Unbind the specified IW CM identifier and QP
151  *
152  * @cm_id: The IW CM idenfier to unbind from the QP.
153  * @qp: The QP
154  *
155  * This is called by the provider when destroying the QP to ensure
156  * that any references held by the IWCM are released. It may also
157  * be called by the IWCM when destroying a CM_ID to that any
158  * references held by the provider are released.
159  */
160 void iw_cm_unbind_qp(struct iw_cm_id *cm_id, struct ib_qp *qp);
161 
162 /**
163  * iw_cm_get_qp - Return the ib_qp associated with a QPN
164  *
165  * @ib_device: The IB device
166  * @qpn: The queue pair number
167  */
168 struct ib_qp *iw_cm_get_qp(struct ib_device *device, int qpn);
169 
170 /**
171  * iw_cm_listen - Listen for incoming connection requests on the
172  * specified IW CM id.
173  *
174  * @cm_id: The IW CM identifier.
175  * @backlog: The maximum number of outstanding un-accepted inbound listen
176  *   requests to queue.
177  *
178  * The source address and port number are specified in the IW CM identifier
179  * structure.
180  */
181 int iw_cm_listen(struct iw_cm_id *cm_id, int backlog);
182 
183 /**
184  * iw_cm_accept - Called to accept an incoming connect request.
185  *
186  * @cm_id: The IW CM identifier associated with the connection request.
187  * @iw_param: Pointer to a structure containing connection establishment
188  *   parameters.
189  *
190  * The specified cm_id will have been provided in the event data for a
191  * CONNECT_REQUEST event. Subsequent events related to this connection will be
192  * delivered to the specified IW CM identifier prior and may occur prior to
193  * the return of this function. If this function returns a non-zero value, the
194  * client can assume that no events will be delivered to the specified IW CM
195  * identifier.
196  */
197 int iw_cm_accept(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
198 
199 /**
200  * iw_cm_reject - Reject an incoming connection request.
201  *
202  * @cm_id: Connection identifier associated with the request.
203  * @private_daa: Pointer to data to deliver to the remote peer as part of the
204  *   reject message.
205  * @private_data_len: The number of bytes in the private_data parameter.
206  *
207  * The client can assume that no events will be delivered to the specified IW
208  * CM identifier following the return of this function. The private_data
209  * buffer is available for reuse when this function returns.
210  */
211 int iw_cm_reject(struct iw_cm_id *cm_id, const void *private_data,
212                  u8 private_data_len);
213 
214 /**
215  * iw_cm_connect - Called to request a connection to a remote peer.
216  *
217  * @cm_id: The IW CM identifier for the connection.
218  * @iw_param: Pointer to a structure containing connection  establishment
219  *   parameters.
220  *
221  * Events may be delivered to the specified IW CM identifier prior to the
222  * return of this function. If this function returns a non-zero value, the
223  * client can assume that no events will be delivered to the specified IW CM
224  * identifier.
225  */
226 int iw_cm_connect(struct iw_cm_id *cm_id, struct iw_cm_conn_param *iw_param);
227 
228 /**
229  * iw_cm_disconnect - Close the specified connection.
230  *
231  * @cm_id: The IW CM identifier to close.
232  * @abrupt: If 0, the connection will be closed gracefully, otherwise, the
233  *   connection will be reset.
234  *
235  * The IW CM identifier is still active until the IW_CM_EVENT_CLOSE event is
236  * delivered.
237  */
238 int iw_cm_disconnect(struct iw_cm_id *cm_id, int abrupt);
239 
240 /**
241  * iw_cm_init_qp_attr - Called to initialize the attributes of the QP
242  * associated with a IW CM identifier.
243  *
244  * @cm_id: The IW CM identifier associated with the QP
245  * @qp_attr: Pointer to the QP attributes structure.
246  * @qp_attr_mask: Pointer to a bit vector specifying which QP attributes are
247  *   valid.
248  */
249 int iw_cm_init_qp_attr(struct iw_cm_id *cm_id, struct ib_qp_attr *qp_attr,
250                        int *qp_attr_mask);
251 
252 #endif /* IW_CM_H */
253 

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