2 * Copyright (c) 2009 Oracle. All rights reserved.
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5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
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8 * OpenIB.org BSD license below:
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11 * without modification, are permitted provided that the following
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15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
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21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <rdma/rdma_cm.h>
35 #include "rdma_transport.h"
37 static struct rdma_cm_id *rds_rdma_listen_id;
39 int rds_rdma_cm_event_handler(struct rdma_cm_id *cm_id,
40 struct rdma_cm_event *event)
42 /* this can be null in the listening path */
43 struct rds_connection *conn = cm_id->context;
44 struct rds_transport *trans;
47 rdsdebug("conn %p id %p handling event %u\n", conn, cm_id,
50 if (cm_id->device->node_type == RDMA_NODE_RNIC)
51 trans = &rds_iw_transport;
53 trans = &rds_ib_transport;
55 /* Prevent shutdown from tearing down the connection
56 * while we're executing. */
58 mutex_lock(&conn->c_cm_lock);
60 /* If the connection is being shut down, bail out
61 * right away. We return 0 so cm_id doesn't get
62 * destroyed prematurely */
63 if (rds_conn_state(conn) == RDS_CONN_DISCONNECTING) {
64 /* Reject incoming connections while we're tearing
65 * down an existing one. */
66 if (event->event == RDMA_CM_EVENT_CONNECT_REQUEST)
72 switch (event->event) {
73 case RDMA_CM_EVENT_CONNECT_REQUEST:
74 ret = trans->cm_handle_connect(cm_id, event);
77 case RDMA_CM_EVENT_ADDR_RESOLVED:
78 /* XXX do we need to clean up if this fails? */
79 ret = rdma_resolve_route(cm_id,
80 RDS_RDMA_RESOLVE_TIMEOUT_MS);
83 case RDMA_CM_EVENT_ROUTE_RESOLVED:
84 /* XXX worry about racing with listen acceptance */
85 ret = trans->cm_initiate_connect(cm_id);
88 case RDMA_CM_EVENT_ESTABLISHED:
89 trans->cm_connect_complete(conn, event);
92 case RDMA_CM_EVENT_ADDR_ERROR:
93 case RDMA_CM_EVENT_ROUTE_ERROR:
94 case RDMA_CM_EVENT_CONNECT_ERROR:
95 case RDMA_CM_EVENT_UNREACHABLE:
96 case RDMA_CM_EVENT_REJECTED:
97 case RDMA_CM_EVENT_DEVICE_REMOVAL:
98 case RDMA_CM_EVENT_ADDR_CHANGE:
103 case RDMA_CM_EVENT_DISCONNECTED:
104 rdsdebug("DISCONNECT event - dropping connection "
105 "%pI4->%pI4\n", &conn->c_laddr,
111 /* things like device disconnect? */
112 printk(KERN_ERR "RDS: unknown event %u!\n", event->event);
118 mutex_unlock(&conn->c_cm_lock);
120 rdsdebug("id %p event %u handling ret %d\n", cm_id, event->event, ret);
125 static int __init rds_rdma_listen_init(void)
127 struct sockaddr_in sin;
128 struct rdma_cm_id *cm_id;
131 cm_id = rdma_create_id(rds_rdma_cm_event_handler, NULL, RDMA_PS_TCP);
133 ret = PTR_ERR(cm_id);
134 printk(KERN_ERR "RDS/RDMA: failed to setup listener, "
135 "rdma_create_id() returned %d\n", ret);
139 sin.sin_family = AF_INET,
140 sin.sin_addr.s_addr = (__force u32)htonl(INADDR_ANY);
141 sin.sin_port = (__force u16)htons(RDS_PORT);
144 * XXX I bet this binds the cm_id to a device. If we want to support
145 * fail-over we'll have to take this into consideration.
147 ret = rdma_bind_addr(cm_id, (struct sockaddr *)&sin);
149 printk(KERN_ERR "RDS/RDMA: failed to setup listener, "
150 "rdma_bind_addr() returned %d\n", ret);
154 ret = rdma_listen(cm_id, 128);
156 printk(KERN_ERR "RDS/RDMA: failed to setup listener, "
157 "rdma_listen() returned %d\n", ret);
161 rdsdebug("cm %p listening on port %u\n", cm_id, RDS_PORT);
163 rds_rdma_listen_id = cm_id;
167 rdma_destroy_id(cm_id);
171 static void rds_rdma_listen_stop(void)
173 if (rds_rdma_listen_id) {
174 rdsdebug("cm %p\n", rds_rdma_listen_id);
175 rdma_destroy_id(rds_rdma_listen_id);
176 rds_rdma_listen_id = NULL;
180 int __init rds_rdma_init(void)
184 ret = rds_rdma_listen_init();
201 rds_rdma_listen_stop();
205 module_init(rds_rdma_init);
207 void rds_rdma_exit(void)
209 /* stop listening first to ensure no new connections are attempted */
210 rds_rdma_listen_stop();
214 module_exit(rds_rdma_exit);
216 MODULE_AUTHOR("Oracle Corporation <rds-devel@oss.oracle.com>");
217 MODULE_DESCRIPTION("RDS: IB/iWARP transport");
218 MODULE_LICENSE("Dual BSD/GPL");