2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
7 * This Software is licensed under one of the following licenses:
9 * 1) under the terms of the "Common Public License 1.0" a copy of which is
10 * available from the Open Source Initiative, see
11 * http://www.opensource.org/licenses/cpl.php.
13 * 2) under the terms of the "The BSD License" a copy of which is
14 * available from the Open Source Initiative, see
15 * http://www.opensource.org/licenses/bsd-license.php.
17 * 3) under the terms of the "GNU General Public License (GPL) Version 2" a
18 * copy of which is available from the Open Source Initiative, see
19 * http://www.opensource.org/licenses/gpl-license.php.
21 * Licensee has the right to choose one of the above licenses.
23 * Redistributions of source code must retain the above copyright
24 * notice and one of the license notices.
26 * Redistributions in binary form must reproduce both the above copyright
27 * notice, one of the license notices in the documentation
28 * and/or other materials provided with the distribution.
32 #include <linux/completion.h>
34 #include <linux/in6.h>
35 #include <linux/mutex.h>
36 #include <linux/random.h>
37 #include <linux/idr.h>
38 #include <linux/inetdevice.h>
42 #include <rdma/rdma_cm.h>
43 #include <rdma/rdma_cm_ib.h>
44 #include <rdma/ib_cache.h>
45 #include <rdma/ib_cm.h>
46 #include <rdma/ib_sa.h>
47 #include <rdma/iw_cm.h>
49 MODULE_AUTHOR("Sean Hefty");
50 MODULE_DESCRIPTION("Generic RDMA CM Agent");
51 MODULE_LICENSE("Dual BSD/GPL");
53 #define CMA_CM_RESPONSE_TIMEOUT 20
54 #define CMA_MAX_CM_RETRIES 15
56 static void cma_add_one(struct ib_device
*device
);
57 static void cma_remove_one(struct ib_device
*device
);
59 static struct ib_client cma_client
= {
62 .remove
= cma_remove_one
65 static struct ib_sa_client sa_client
;
66 static struct rdma_addr_client addr_client
;
67 static LIST_HEAD(dev_list
);
68 static LIST_HEAD(listen_any_list
);
69 static DEFINE_MUTEX(lock
);
70 static struct workqueue_struct
*cma_wq
;
71 static DEFINE_IDR(sdp_ps
);
72 static DEFINE_IDR(tcp_ps
);
73 static DEFINE_IDR(udp_ps
);
76 struct list_head list
;
77 struct ib_device
*device
;
79 struct completion comp
;
81 struct list_head id_list
;
98 struct rdma_bind_list
{
100 struct hlist_head owners
;
105 * Device removal can occur at anytime, so we need extra handling to
106 * serialize notifying the user of device removal with other callbacks.
107 * We do this by disabling removal notification while a callback is in process,
108 * and reporting it after the callback completes.
110 struct rdma_id_private
{
111 struct rdma_cm_id id
;
113 struct rdma_bind_list
*bind_list
;
114 struct hlist_node node
;
115 struct list_head list
;
116 struct list_head listen_list
;
117 struct cma_device
*cma_dev
;
119 enum cma_state state
;
121 struct completion comp
;
123 wait_queue_head_t wait_remove
;
128 struct ib_sa_query
*query
;
141 struct work_struct work
;
142 struct rdma_id_private
*id
;
143 enum cma_state old_state
;
144 enum cma_state new_state
;
145 struct rdma_cm_event event
;
158 u8 ip_version
; /* IP version: 7:4 */
160 union cma_ip_addr src_addr
;
161 union cma_ip_addr dst_addr
;
166 u8 sdp_version
; /* Major version: 7:4 */
167 u8 ip_version
; /* IP version: 7:4 */
168 u8 sdp_specific1
[10];
171 union cma_ip_addr src_addr
;
172 union cma_ip_addr dst_addr
;
180 #define CMA_VERSION 0x00
181 #define SDP_MAJ_VERSION 0x2
183 static int cma_comp(struct rdma_id_private
*id_priv
, enum cma_state comp
)
188 spin_lock_irqsave(&id_priv
->lock
, flags
);
189 ret
= (id_priv
->state
== comp
);
190 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
194 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
195 enum cma_state comp
, enum cma_state exch
)
200 spin_lock_irqsave(&id_priv
->lock
, flags
);
201 if ((ret
= (id_priv
->state
== comp
)))
202 id_priv
->state
= exch
;
203 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
207 static enum cma_state
cma_exch(struct rdma_id_private
*id_priv
,
213 spin_lock_irqsave(&id_priv
->lock
, flags
);
214 old
= id_priv
->state
;
215 id_priv
->state
= exch
;
216 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
220 static inline u8
cma_get_ip_ver(struct cma_hdr
*hdr
)
222 return hdr
->ip_version
>> 4;
225 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
227 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
230 static inline u8
sdp_get_majv(u8 sdp_version
)
232 return sdp_version
>> 4;
235 static inline u8
sdp_get_ip_ver(struct sdp_hh
*hh
)
237 return hh
->ip_version
>> 4;
240 static inline void sdp_set_ip_ver(struct sdp_hh
*hh
, u8 ip_ver
)
242 hh
->ip_version
= (ip_ver
<< 4) | (hh
->ip_version
& 0xF);
245 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
246 struct cma_device
*cma_dev
)
248 atomic_inc(&cma_dev
->refcount
);
249 id_priv
->cma_dev
= cma_dev
;
250 id_priv
->id
.device
= cma_dev
->device
;
251 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
254 static inline void cma_deref_dev(struct cma_device
*cma_dev
)
256 if (atomic_dec_and_test(&cma_dev
->refcount
))
257 complete(&cma_dev
->comp
);
260 static void cma_detach_from_dev(struct rdma_id_private
*id_priv
)
262 list_del(&id_priv
->list
);
263 cma_deref_dev(id_priv
->cma_dev
);
264 id_priv
->cma_dev
= NULL
;
267 static int cma_acquire_dev(struct rdma_id_private
*id_priv
)
269 enum rdma_node_type dev_type
= id_priv
->id
.route
.addr
.dev_addr
.dev_type
;
270 struct cma_device
*cma_dev
;
274 switch (rdma_node_get_transport(dev_type
)) {
275 case RDMA_TRANSPORT_IB
:
276 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
278 case RDMA_TRANSPORT_IWARP
:
279 iw_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
285 list_for_each_entry(cma_dev
, &dev_list
, list
) {
286 ret
= ib_find_cached_gid(cma_dev
->device
, &gid
,
287 &id_priv
->id
.port_num
, NULL
);
289 cma_attach_to_dev(id_priv
, cma_dev
);
296 static void cma_deref_id(struct rdma_id_private
*id_priv
)
298 if (atomic_dec_and_test(&id_priv
->refcount
))
299 complete(&id_priv
->comp
);
302 static void cma_release_remove(struct rdma_id_private
*id_priv
)
304 if (atomic_dec_and_test(&id_priv
->dev_remove
))
305 wake_up(&id_priv
->wait_remove
);
308 struct rdma_cm_id
*rdma_create_id(rdma_cm_event_handler event_handler
,
309 void *context
, enum rdma_port_space ps
)
311 struct rdma_id_private
*id_priv
;
313 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
315 return ERR_PTR(-ENOMEM
);
317 id_priv
->state
= CMA_IDLE
;
318 id_priv
->id
.context
= context
;
319 id_priv
->id
.event_handler
= event_handler
;
321 spin_lock_init(&id_priv
->lock
);
322 init_completion(&id_priv
->comp
);
323 atomic_set(&id_priv
->refcount
, 1);
324 init_waitqueue_head(&id_priv
->wait_remove
);
325 atomic_set(&id_priv
->dev_remove
, 0);
326 INIT_LIST_HEAD(&id_priv
->listen_list
);
327 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
331 EXPORT_SYMBOL(rdma_create_id
);
333 static int cma_init_ib_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
335 struct ib_qp_attr qp_attr
;
336 struct rdma_dev_addr
*dev_addr
;
339 dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
340 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
341 ib_addr_get_pkey(dev_addr
),
342 &qp_attr
.pkey_index
);
346 qp_attr
.qp_state
= IB_QPS_INIT
;
347 qp_attr
.qp_access_flags
= 0;
348 qp_attr
.port_num
= id_priv
->id
.port_num
;
349 return ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_ACCESS_FLAGS
|
350 IB_QP_PKEY_INDEX
| IB_QP_PORT
);
353 static int cma_init_iw_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
355 struct ib_qp_attr qp_attr
;
357 qp_attr
.qp_state
= IB_QPS_INIT
;
358 qp_attr
.qp_access_flags
= IB_ACCESS_LOCAL_WRITE
;
360 return ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_ACCESS_FLAGS
);
363 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
364 struct ib_qp_init_attr
*qp_init_attr
)
366 struct rdma_id_private
*id_priv
;
370 id_priv
= container_of(id
, struct rdma_id_private
, id
);
371 if (id
->device
!= pd
->device
)
374 qp
= ib_create_qp(pd
, qp_init_attr
);
378 switch (rdma_node_get_transport(id
->device
->node_type
)) {
379 case RDMA_TRANSPORT_IB
:
380 ret
= cma_init_ib_qp(id_priv
, qp
);
382 case RDMA_TRANSPORT_IWARP
:
383 ret
= cma_init_iw_qp(id_priv
, qp
);
394 id_priv
->qp_num
= qp
->qp_num
;
395 id_priv
->srq
= (qp
->srq
!= NULL
);
401 EXPORT_SYMBOL(rdma_create_qp
);
403 void rdma_destroy_qp(struct rdma_cm_id
*id
)
405 ib_destroy_qp(id
->qp
);
407 EXPORT_SYMBOL(rdma_destroy_qp
);
409 static int cma_modify_qp_rtr(struct rdma_cm_id
*id
)
411 struct ib_qp_attr qp_attr
;
412 int qp_attr_mask
, ret
;
417 /* Need to update QP attributes from default values. */
418 qp_attr
.qp_state
= IB_QPS_INIT
;
419 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
423 ret
= ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
427 qp_attr
.qp_state
= IB_QPS_RTR
;
428 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
432 return ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
435 static int cma_modify_qp_rts(struct rdma_cm_id
*id
)
437 struct ib_qp_attr qp_attr
;
438 int qp_attr_mask
, ret
;
443 qp_attr
.qp_state
= IB_QPS_RTS
;
444 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
448 return ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
451 static int cma_modify_qp_err(struct rdma_cm_id
*id
)
453 struct ib_qp_attr qp_attr
;
458 qp_attr
.qp_state
= IB_QPS_ERR
;
459 return ib_modify_qp(id
->qp
, &qp_attr
, IB_QP_STATE
);
462 int rdma_init_qp_attr(struct rdma_cm_id
*id
, struct ib_qp_attr
*qp_attr
,
465 struct rdma_id_private
*id_priv
;
468 id_priv
= container_of(id
, struct rdma_id_private
, id
);
469 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
470 case RDMA_TRANSPORT_IB
:
471 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, qp_attr
,
473 if (qp_attr
->qp_state
== IB_QPS_RTR
)
474 qp_attr
->rq_psn
= id_priv
->seq_num
;
476 case RDMA_TRANSPORT_IWARP
:
477 ret
= iw_cm_init_qp_attr(id_priv
->cm_id
.iw
, qp_attr
,
487 EXPORT_SYMBOL(rdma_init_qp_attr
);
489 static inline int cma_zero_addr(struct sockaddr
*addr
)
491 struct in6_addr
*ip6
;
493 if (addr
->sa_family
== AF_INET
)
494 return ZERONET(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
496 ip6
= &((struct sockaddr_in6
*) addr
)->sin6_addr
;
497 return (ip6
->s6_addr32
[0] | ip6
->s6_addr32
[1] |
498 ip6
->s6_addr32
[2] | ip6
->s6_addr32
[3]) == 0;
502 static inline int cma_loopback_addr(struct sockaddr
*addr
)
504 return LOOPBACK(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
507 static inline int cma_any_addr(struct sockaddr
*addr
)
509 return cma_zero_addr(addr
) || cma_loopback_addr(addr
);
512 static inline __be16
cma_port(struct sockaddr
*addr
)
514 if (addr
->sa_family
== AF_INET
)
515 return ((struct sockaddr_in
*) addr
)->sin_port
;
517 return ((struct sockaddr_in6
*) addr
)->sin6_port
;
520 static inline int cma_any_port(struct sockaddr
*addr
)
522 return !cma_port(addr
);
525 static int cma_get_net_info(void *hdr
, enum rdma_port_space ps
,
526 u8
*ip_ver
, __u16
*port
,
527 union cma_ip_addr
**src
, union cma_ip_addr
**dst
)
531 if (sdp_get_majv(((struct sdp_hh
*) hdr
)->sdp_version
) !=
535 *ip_ver
= sdp_get_ip_ver(hdr
);
536 *port
= ((struct sdp_hh
*) hdr
)->port
;
537 *src
= &((struct sdp_hh
*) hdr
)->src_addr
;
538 *dst
= &((struct sdp_hh
*) hdr
)->dst_addr
;
541 if (((struct cma_hdr
*) hdr
)->cma_version
!= CMA_VERSION
)
544 *ip_ver
= cma_get_ip_ver(hdr
);
545 *port
= ((struct cma_hdr
*) hdr
)->port
;
546 *src
= &((struct cma_hdr
*) hdr
)->src_addr
;
547 *dst
= &((struct cma_hdr
*) hdr
)->dst_addr
;
551 if (*ip_ver
!= 4 && *ip_ver
!= 6)
556 static void cma_save_net_info(struct rdma_addr
*addr
,
557 struct rdma_addr
*listen_addr
,
558 u8 ip_ver
, __u16 port
,
559 union cma_ip_addr
*src
, union cma_ip_addr
*dst
)
561 struct sockaddr_in
*listen4
, *ip4
;
562 struct sockaddr_in6
*listen6
, *ip6
;
566 listen4
= (struct sockaddr_in
*) &listen_addr
->src_addr
;
567 ip4
= (struct sockaddr_in
*) &addr
->src_addr
;
568 ip4
->sin_family
= listen4
->sin_family
;
569 ip4
->sin_addr
.s_addr
= dst
->ip4
.addr
;
570 ip4
->sin_port
= listen4
->sin_port
;
572 ip4
= (struct sockaddr_in
*) &addr
->dst_addr
;
573 ip4
->sin_family
= listen4
->sin_family
;
574 ip4
->sin_addr
.s_addr
= src
->ip4
.addr
;
575 ip4
->sin_port
= port
;
578 listen6
= (struct sockaddr_in6
*) &listen_addr
->src_addr
;
579 ip6
= (struct sockaddr_in6
*) &addr
->src_addr
;
580 ip6
->sin6_family
= listen6
->sin6_family
;
581 ip6
->sin6_addr
= dst
->ip6
;
582 ip6
->sin6_port
= listen6
->sin6_port
;
584 ip6
= (struct sockaddr_in6
*) &addr
->dst_addr
;
585 ip6
->sin6_family
= listen6
->sin6_family
;
586 ip6
->sin6_addr
= src
->ip6
;
587 ip6
->sin6_port
= port
;
594 static inline int cma_user_data_offset(enum rdma_port_space ps
)
600 return sizeof(struct cma_hdr
);
604 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
606 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
607 case RDMA_TRANSPORT_IB
:
609 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
616 static inline int cma_internal_listen(struct rdma_id_private
*id_priv
)
618 return (id_priv
->state
== CMA_LISTEN
) && id_priv
->cma_dev
&&
619 cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
);
622 static void cma_destroy_listen(struct rdma_id_private
*id_priv
)
624 cma_exch(id_priv
, CMA_DESTROYING
);
626 if (id_priv
->cma_dev
) {
627 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
628 case RDMA_TRANSPORT_IB
:
629 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
630 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
632 case RDMA_TRANSPORT_IWARP
:
633 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
634 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
639 cma_detach_from_dev(id_priv
);
641 list_del(&id_priv
->listen_list
);
643 cma_deref_id(id_priv
);
644 wait_for_completion(&id_priv
->comp
);
649 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
651 struct rdma_id_private
*dev_id_priv
;
654 list_del(&id_priv
->list
);
656 while (!list_empty(&id_priv
->listen_list
)) {
657 dev_id_priv
= list_entry(id_priv
->listen_list
.next
,
658 struct rdma_id_private
, listen_list
);
659 cma_destroy_listen(dev_id_priv
);
664 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
665 enum cma_state state
)
669 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
671 case CMA_ROUTE_QUERY
:
672 cma_cancel_route(id_priv
);
675 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
) &&
677 cma_cancel_listens(id_priv
);
684 static void cma_release_port(struct rdma_id_private
*id_priv
)
686 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
692 hlist_del(&id_priv
->node
);
693 if (hlist_empty(&bind_list
->owners
)) {
694 idr_remove(bind_list
->ps
, bind_list
->port
);
700 void rdma_destroy_id(struct rdma_cm_id
*id
)
702 struct rdma_id_private
*id_priv
;
703 enum cma_state state
;
705 id_priv
= container_of(id
, struct rdma_id_private
, id
);
706 state
= cma_exch(id_priv
, CMA_DESTROYING
);
707 cma_cancel_operation(id_priv
, state
);
710 if (id_priv
->cma_dev
) {
712 switch (rdma_node_get_transport(id
->device
->node_type
)) {
713 case RDMA_TRANSPORT_IB
:
714 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
715 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
717 case RDMA_TRANSPORT_IWARP
:
718 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
719 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
725 cma_detach_from_dev(id_priv
);
729 cma_release_port(id_priv
);
730 cma_deref_id(id_priv
);
731 wait_for_completion(&id_priv
->comp
);
733 kfree(id_priv
->id
.route
.path_rec
);
736 EXPORT_SYMBOL(rdma_destroy_id
);
738 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
742 ret
= cma_modify_qp_rtr(&id_priv
->id
);
746 ret
= cma_modify_qp_rts(&id_priv
->id
);
750 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
756 cma_modify_qp_err(&id_priv
->id
);
757 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
762 static int cma_verify_rep(struct rdma_id_private
*id_priv
, void *data
)
764 if (id_priv
->id
.ps
== RDMA_PS_SDP
&&
765 sdp_get_majv(((struct sdp_hah
*) data
)->sdp_version
) !=
772 static void cma_set_rep_event_data(struct rdma_cm_event
*event
,
773 struct ib_cm_rep_event_param
*rep_data
,
776 event
->param
.conn
.private_data
= private_data
;
777 event
->param
.conn
.private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
778 event
->param
.conn
.responder_resources
= rep_data
->responder_resources
;
779 event
->param
.conn
.initiator_depth
= rep_data
->initiator_depth
;
780 event
->param
.conn
.flow_control
= rep_data
->flow_control
;
781 event
->param
.conn
.rnr_retry_count
= rep_data
->rnr_retry_count
;
782 event
->param
.conn
.srq
= rep_data
->srq
;
783 event
->param
.conn
.qp_num
= rep_data
->remote_qpn
;
786 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
788 struct rdma_id_private
*id_priv
= cm_id
->context
;
789 struct rdma_cm_event event
;
792 atomic_inc(&id_priv
->dev_remove
);
793 if (!cma_comp(id_priv
, CMA_CONNECT
))
796 memset(&event
, 0, sizeof event
);
797 switch (ib_event
->event
) {
798 case IB_CM_REQ_ERROR
:
799 case IB_CM_REP_ERROR
:
800 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
801 event
.status
= -ETIMEDOUT
;
803 case IB_CM_REP_RECEIVED
:
804 event
.status
= cma_verify_rep(id_priv
, ib_event
->private_data
);
806 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
807 else if (id_priv
->id
.qp
&& id_priv
->id
.ps
!= RDMA_PS_SDP
) {
808 event
.status
= cma_rep_recv(id_priv
);
809 event
.event
= event
.status
? RDMA_CM_EVENT_CONNECT_ERROR
:
810 RDMA_CM_EVENT_ESTABLISHED
;
812 event
.event
= RDMA_CM_EVENT_CONNECT_RESPONSE
;
813 cma_set_rep_event_data(&event
, &ib_event
->param
.rep_rcvd
,
814 ib_event
->private_data
);
816 case IB_CM_RTU_RECEIVED
:
817 case IB_CM_USER_ESTABLISHED
:
818 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
820 case IB_CM_DREQ_ERROR
:
821 event
.status
= -ETIMEDOUT
; /* fall through */
822 case IB_CM_DREQ_RECEIVED
:
823 case IB_CM_DREP_RECEIVED
:
824 if (!cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_DISCONNECT
))
826 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
828 case IB_CM_TIMEWAIT_EXIT
:
829 case IB_CM_MRA_RECEIVED
:
832 case IB_CM_REJ_RECEIVED
:
833 cma_modify_qp_err(&id_priv
->id
);
834 event
.status
= ib_event
->param
.rej_rcvd
.reason
;
835 event
.event
= RDMA_CM_EVENT_REJECTED
;
836 event
.param
.conn
.private_data
= ib_event
->private_data
;
837 event
.param
.conn
.private_data_len
= IB_CM_REJ_PRIVATE_DATA_SIZE
;
840 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
845 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
847 /* Destroy the CM ID by returning a non-zero value. */
848 id_priv
->cm_id
.ib
= NULL
;
849 cma_exch(id_priv
, CMA_DESTROYING
);
850 cma_release_remove(id_priv
);
851 rdma_destroy_id(&id_priv
->id
);
855 cma_release_remove(id_priv
);
859 static struct rdma_id_private
*cma_new_conn_id(struct rdma_cm_id
*listen_id
,
860 struct ib_cm_event
*ib_event
)
862 struct rdma_id_private
*id_priv
;
863 struct rdma_cm_id
*id
;
864 struct rdma_route
*rt
;
865 union cma_ip_addr
*src
, *dst
;
869 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
870 &ip_ver
, &port
, &src
, &dst
))
873 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
878 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
879 ip_ver
, port
, src
, dst
);
882 rt
->num_paths
= ib_event
->param
.req_rcvd
.alternate_path
? 2 : 1;
883 rt
->path_rec
= kmalloc(sizeof *rt
->path_rec
* rt
->num_paths
,
888 rt
->path_rec
[0] = *ib_event
->param
.req_rcvd
.primary_path
;
889 if (rt
->num_paths
== 2)
890 rt
->path_rec
[1] = *ib_event
->param
.req_rcvd
.alternate_path
;
892 ib_addr_set_sgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].sgid
);
893 ib_addr_set_dgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].dgid
);
894 ib_addr_set_pkey(&rt
->addr
.dev_addr
, be16_to_cpu(rt
->path_rec
[0].pkey
));
895 rt
->addr
.dev_addr
.dev_type
= RDMA_NODE_IB_CA
;
897 id_priv
= container_of(id
, struct rdma_id_private
, id
);
898 id_priv
->state
= CMA_CONNECT
;
907 static struct rdma_id_private
*cma_new_udp_id(struct rdma_cm_id
*listen_id
,
908 struct ib_cm_event
*ib_event
)
910 struct rdma_id_private
*id_priv
;
911 struct rdma_cm_id
*id
;
912 union cma_ip_addr
*src
, *dst
;
917 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
923 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
924 &ip_ver
, &port
, &src
, &dst
))
927 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
928 ip_ver
, port
, src
, dst
);
930 ret
= rdma_translate_ip(&id
->route
.addr
.src_addr
,
931 &id
->route
.addr
.dev_addr
);
935 id_priv
= container_of(id
, struct rdma_id_private
, id
);
936 id_priv
->state
= CMA_CONNECT
;
943 static void cma_set_req_event_data(struct rdma_cm_event
*event
,
944 struct ib_cm_req_event_param
*req_data
,
945 void *private_data
, int offset
)
947 event
->param
.conn
.private_data
= private_data
+ offset
;
948 event
->param
.conn
.private_data_len
= IB_CM_REQ_PRIVATE_DATA_SIZE
- offset
;
949 event
->param
.conn
.responder_resources
= req_data
->responder_resources
;
950 event
->param
.conn
.initiator_depth
= req_data
->initiator_depth
;
951 event
->param
.conn
.flow_control
= req_data
->flow_control
;
952 event
->param
.conn
.retry_count
= req_data
->retry_count
;
953 event
->param
.conn
.rnr_retry_count
= req_data
->rnr_retry_count
;
954 event
->param
.conn
.srq
= req_data
->srq
;
955 event
->param
.conn
.qp_num
= req_data
->remote_qpn
;
958 static int cma_req_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
960 struct rdma_id_private
*listen_id
, *conn_id
;
961 struct rdma_cm_event event
;
964 listen_id
= cm_id
->context
;
965 atomic_inc(&listen_id
->dev_remove
);
966 if (!cma_comp(listen_id
, CMA_LISTEN
)) {
971 memset(&event
, 0, sizeof event
);
972 offset
= cma_user_data_offset(listen_id
->id
.ps
);
973 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
974 if (listen_id
->id
.ps
== RDMA_PS_UDP
) {
975 conn_id
= cma_new_udp_id(&listen_id
->id
, ib_event
);
976 event
.param
.ud
.private_data
= ib_event
->private_data
+ offset
;
977 event
.param
.ud
.private_data_len
=
978 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
- offset
;
980 conn_id
= cma_new_conn_id(&listen_id
->id
, ib_event
);
981 cma_set_req_event_data(&event
, &ib_event
->param
.req_rcvd
,
982 ib_event
->private_data
, offset
);
989 atomic_inc(&conn_id
->dev_remove
);
991 ret
= cma_acquire_dev(conn_id
);
994 goto release_conn_id
;
996 conn_id
->cm_id
.ib
= cm_id
;
997 cm_id
->context
= conn_id
;
998 cm_id
->cm_handler
= cma_ib_handler
;
1000 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1004 /* Destroy the CM ID by returning a non-zero value. */
1005 conn_id
->cm_id
.ib
= NULL
;
1008 cma_exch(conn_id
, CMA_DESTROYING
);
1009 cma_release_remove(conn_id
);
1010 rdma_destroy_id(&conn_id
->id
);
1013 cma_release_remove(listen_id
);
1017 static __be64
cma_get_service_id(enum rdma_port_space ps
, struct sockaddr
*addr
)
1019 return cpu_to_be64(((u64
)ps
<< 16) + be16_to_cpu(cma_port(addr
)));
1022 static void cma_set_compare_data(enum rdma_port_space ps
, struct sockaddr
*addr
,
1023 struct ib_cm_compare_data
*compare
)
1025 struct cma_hdr
*cma_data
, *cma_mask
;
1026 struct sdp_hh
*sdp_data
, *sdp_mask
;
1028 struct in6_addr ip6_addr
;
1030 memset(compare
, 0, sizeof *compare
);
1031 cma_data
= (void *) compare
->data
;
1032 cma_mask
= (void *) compare
->mask
;
1033 sdp_data
= (void *) compare
->data
;
1034 sdp_mask
= (void *) compare
->mask
;
1036 switch (addr
->sa_family
) {
1038 ip4_addr
= ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
;
1039 if (ps
== RDMA_PS_SDP
) {
1040 sdp_set_ip_ver(sdp_data
, 4);
1041 sdp_set_ip_ver(sdp_mask
, 0xF);
1042 sdp_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1043 sdp_mask
->dst_addr
.ip4
.addr
= ~0;
1045 cma_set_ip_ver(cma_data
, 4);
1046 cma_set_ip_ver(cma_mask
, 0xF);
1047 cma_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1048 cma_mask
->dst_addr
.ip4
.addr
= ~0;
1052 ip6_addr
= ((struct sockaddr_in6
*) addr
)->sin6_addr
;
1053 if (ps
== RDMA_PS_SDP
) {
1054 sdp_set_ip_ver(sdp_data
, 6);
1055 sdp_set_ip_ver(sdp_mask
, 0xF);
1056 sdp_data
->dst_addr
.ip6
= ip6_addr
;
1057 memset(&sdp_mask
->dst_addr
.ip6
, 0xFF,
1058 sizeof sdp_mask
->dst_addr
.ip6
);
1060 cma_set_ip_ver(cma_data
, 6);
1061 cma_set_ip_ver(cma_mask
, 0xF);
1062 cma_data
->dst_addr
.ip6
= ip6_addr
;
1063 memset(&cma_mask
->dst_addr
.ip6
, 0xFF,
1064 sizeof cma_mask
->dst_addr
.ip6
);
1072 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1074 struct rdma_id_private
*id_priv
= iw_id
->context
;
1075 struct rdma_cm_event event
;
1076 struct sockaddr_in
*sin
;
1079 memset(&event
, 0, sizeof event
);
1080 atomic_inc(&id_priv
->dev_remove
);
1082 switch (iw_event
->event
) {
1083 case IW_CM_EVENT_CLOSE
:
1084 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
1086 case IW_CM_EVENT_CONNECT_REPLY
:
1087 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1088 *sin
= iw_event
->local_addr
;
1089 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1090 *sin
= iw_event
->remote_addr
;
1091 switch (iw_event
->status
) {
1093 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1097 event
.event
= RDMA_CM_EVENT_REJECTED
;
1100 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1103 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
1107 case IW_CM_EVENT_ESTABLISHED
:
1108 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1114 event
.status
= iw_event
->status
;
1115 event
.param
.conn
.private_data
= iw_event
->private_data
;
1116 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1117 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
1119 /* Destroy the CM ID by returning a non-zero value. */
1120 id_priv
->cm_id
.iw
= NULL
;
1121 cma_exch(id_priv
, CMA_DESTROYING
);
1122 cma_release_remove(id_priv
);
1123 rdma_destroy_id(&id_priv
->id
);
1127 cma_release_remove(id_priv
);
1131 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
1132 struct iw_cm_event
*iw_event
)
1134 struct rdma_cm_id
*new_cm_id
;
1135 struct rdma_id_private
*listen_id
, *conn_id
;
1136 struct sockaddr_in
*sin
;
1137 struct net_device
*dev
= NULL
;
1138 struct rdma_cm_event event
;
1141 listen_id
= cm_id
->context
;
1142 atomic_inc(&listen_id
->dev_remove
);
1143 if (!cma_comp(listen_id
, CMA_LISTEN
)) {
1144 ret
= -ECONNABORTED
;
1148 /* Create a new RDMA id for the new IW CM ID */
1149 new_cm_id
= rdma_create_id(listen_id
->id
.event_handler
,
1150 listen_id
->id
.context
,
1156 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
1157 atomic_inc(&conn_id
->dev_remove
);
1158 conn_id
->state
= CMA_CONNECT
;
1160 dev
= ip_dev_find(iw_event
->local_addr
.sin_addr
.s_addr
);
1162 ret
= -EADDRNOTAVAIL
;
1163 cma_release_remove(conn_id
);
1164 rdma_destroy_id(new_cm_id
);
1167 ret
= rdma_copy_addr(&conn_id
->id
.route
.addr
.dev_addr
, dev
, NULL
);
1169 cma_release_remove(conn_id
);
1170 rdma_destroy_id(new_cm_id
);
1175 ret
= cma_acquire_dev(conn_id
);
1176 mutex_unlock(&lock
);
1178 cma_release_remove(conn_id
);
1179 rdma_destroy_id(new_cm_id
);
1183 conn_id
->cm_id
.iw
= cm_id
;
1184 cm_id
->context
= conn_id
;
1185 cm_id
->cm_handler
= cma_iw_handler
;
1187 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.src_addr
;
1188 *sin
= iw_event
->local_addr
;
1189 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.dst_addr
;
1190 *sin
= iw_event
->remote_addr
;
1192 memset(&event
, 0, sizeof event
);
1193 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1194 event
.param
.conn
.private_data
= iw_event
->private_data
;
1195 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1196 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1198 /* User wants to destroy the CM ID */
1199 conn_id
->cm_id
.iw
= NULL
;
1200 cma_exch(conn_id
, CMA_DESTROYING
);
1201 cma_release_remove(conn_id
);
1202 rdma_destroy_id(&conn_id
->id
);
1208 cma_release_remove(listen_id
);
1212 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
1214 struct ib_cm_compare_data compare_data
;
1215 struct sockaddr
*addr
;
1219 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_req_handler
,
1221 if (IS_ERR(id_priv
->cm_id
.ib
))
1222 return PTR_ERR(id_priv
->cm_id
.ib
);
1224 addr
= &id_priv
->id
.route
.addr
.src_addr
;
1225 svc_id
= cma_get_service_id(id_priv
->id
.ps
, addr
);
1226 if (cma_any_addr(addr
))
1227 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, NULL
);
1229 cma_set_compare_data(id_priv
->id
.ps
, addr
, &compare_data
);
1230 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, &compare_data
);
1234 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1235 id_priv
->cm_id
.ib
= NULL
;
1241 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
1244 struct sockaddr_in
*sin
;
1246 id_priv
->cm_id
.iw
= iw_create_cm_id(id_priv
->id
.device
,
1247 iw_conn_req_handler
,
1249 if (IS_ERR(id_priv
->cm_id
.iw
))
1250 return PTR_ERR(id_priv
->cm_id
.iw
);
1252 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1253 id_priv
->cm_id
.iw
->local_addr
= *sin
;
1255 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
1258 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1259 id_priv
->cm_id
.iw
= NULL
;
1265 static int cma_listen_handler(struct rdma_cm_id
*id
,
1266 struct rdma_cm_event
*event
)
1268 struct rdma_id_private
*id_priv
= id
->context
;
1270 id
->context
= id_priv
->id
.context
;
1271 id
->event_handler
= id_priv
->id
.event_handler
;
1272 return id_priv
->id
.event_handler(id
, event
);
1275 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
1276 struct cma_device
*cma_dev
)
1278 struct rdma_id_private
*dev_id_priv
;
1279 struct rdma_cm_id
*id
;
1282 id
= rdma_create_id(cma_listen_handler
, id_priv
, id_priv
->id
.ps
);
1286 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
1288 dev_id_priv
->state
= CMA_ADDR_BOUND
;
1289 memcpy(&id
->route
.addr
.src_addr
, &id_priv
->id
.route
.addr
.src_addr
,
1290 ip_addr_size(&id_priv
->id
.route
.addr
.src_addr
));
1292 cma_attach_to_dev(dev_id_priv
, cma_dev
);
1293 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
1295 ret
= rdma_listen(id
, id_priv
->backlog
);
1301 cma_destroy_listen(dev_id_priv
);
1304 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
1306 struct cma_device
*cma_dev
;
1309 list_add_tail(&id_priv
->list
, &listen_any_list
);
1310 list_for_each_entry(cma_dev
, &dev_list
, list
)
1311 cma_listen_on_dev(id_priv
, cma_dev
);
1312 mutex_unlock(&lock
);
1315 static int cma_bind_any(struct rdma_cm_id
*id
, sa_family_t af
)
1317 struct sockaddr_in addr_in
;
1319 memset(&addr_in
, 0, sizeof addr_in
);
1320 addr_in
.sin_family
= af
;
1321 return rdma_bind_addr(id
, (struct sockaddr
*) &addr_in
);
1324 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
1326 struct rdma_id_private
*id_priv
;
1329 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1330 if (id_priv
->state
== CMA_IDLE
) {
1331 ret
= cma_bind_any(id
, AF_INET
);
1336 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_LISTEN
))
1339 id_priv
->backlog
= backlog
;
1341 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1342 case RDMA_TRANSPORT_IB
:
1343 ret
= cma_ib_listen(id_priv
);
1347 case RDMA_TRANSPORT_IWARP
:
1348 ret
= cma_iw_listen(id_priv
, backlog
);
1357 cma_listen_on_all(id_priv
);
1361 id_priv
->backlog
= 0;
1362 cma_comp_exch(id_priv
, CMA_LISTEN
, CMA_ADDR_BOUND
);
1365 EXPORT_SYMBOL(rdma_listen
);
1367 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
1370 struct cma_work
*work
= context
;
1371 struct rdma_route
*route
;
1373 route
= &work
->id
->id
.route
;
1376 route
->num_paths
= 1;
1377 *route
->path_rec
= *path_rec
;
1379 work
->old_state
= CMA_ROUTE_QUERY
;
1380 work
->new_state
= CMA_ADDR_RESOLVED
;
1381 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
1382 work
->event
.status
= status
;
1385 queue_work(cma_wq
, &work
->work
);
1388 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
1389 struct cma_work
*work
)
1391 struct rdma_dev_addr
*addr
= &id_priv
->id
.route
.addr
.dev_addr
;
1392 struct ib_sa_path_rec path_rec
;
1394 memset(&path_rec
, 0, sizeof path_rec
);
1395 ib_addr_get_sgid(addr
, &path_rec
.sgid
);
1396 ib_addr_get_dgid(addr
, &path_rec
.dgid
);
1397 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(addr
));
1398 path_rec
.numb_path
= 1;
1400 id_priv
->query_id
= ib_sa_path_rec_get(&sa_client
, id_priv
->id
.device
,
1401 id_priv
->id
.port_num
, &path_rec
,
1402 IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
1403 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
,
1404 timeout_ms
, GFP_KERNEL
,
1405 cma_query_handler
, work
, &id_priv
->query
);
1407 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
1410 static void cma_work_handler(struct work_struct
*_work
)
1412 struct cma_work
*work
= container_of(_work
, struct cma_work
, work
);
1413 struct rdma_id_private
*id_priv
= work
->id
;
1416 atomic_inc(&id_priv
->dev_remove
);
1417 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
1420 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
1421 cma_exch(id_priv
, CMA_DESTROYING
);
1425 cma_release_remove(id_priv
);
1426 cma_deref_id(id_priv
);
1428 rdma_destroy_id(&id_priv
->id
);
1432 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1434 struct rdma_route
*route
= &id_priv
->id
.route
;
1435 struct cma_work
*work
;
1438 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1443 INIT_WORK(&work
->work
, cma_work_handler
);
1444 work
->old_state
= CMA_ROUTE_QUERY
;
1445 work
->new_state
= CMA_ROUTE_RESOLVED
;
1446 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1448 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
1449 if (!route
->path_rec
) {
1454 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
1460 kfree(route
->path_rec
);
1461 route
->path_rec
= NULL
;
1467 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
1468 struct ib_sa_path_rec
*path_rec
, int num_paths
)
1470 struct rdma_id_private
*id_priv
;
1473 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1474 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_RESOLVED
))
1477 id
->route
.path_rec
= kmalloc(sizeof *path_rec
* num_paths
, GFP_KERNEL
);
1478 if (!id
->route
.path_rec
) {
1483 memcpy(id
->route
.path_rec
, path_rec
, sizeof *path_rec
* num_paths
);
1486 cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_ADDR_RESOLVED
);
1489 EXPORT_SYMBOL(rdma_set_ib_paths
);
1491 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1493 struct cma_work
*work
;
1495 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1500 INIT_WORK(&work
->work
, cma_work_handler
);
1501 work
->old_state
= CMA_ROUTE_QUERY
;
1502 work
->new_state
= CMA_ROUTE_RESOLVED
;
1503 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1504 queue_work(cma_wq
, &work
->work
);
1508 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
1510 struct rdma_id_private
*id_priv
;
1513 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1514 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_QUERY
))
1517 atomic_inc(&id_priv
->refcount
);
1518 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1519 case RDMA_TRANSPORT_IB
:
1520 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
1522 case RDMA_TRANSPORT_IWARP
:
1523 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
1534 cma_comp_exch(id_priv
, CMA_ROUTE_QUERY
, CMA_ADDR_RESOLVED
);
1535 cma_deref_id(id_priv
);
1538 EXPORT_SYMBOL(rdma_resolve_route
);
1540 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
1542 struct cma_device
*cma_dev
;
1543 struct ib_port_attr port_attr
;
1550 if (list_empty(&dev_list
)) {
1554 list_for_each_entry(cma_dev
, &dev_list
, list
)
1555 for (p
= 1; p
<= cma_dev
->device
->phys_port_cnt
; ++p
)
1556 if (!ib_query_port(cma_dev
->device
, p
, &port_attr
) &&
1557 port_attr
.state
== IB_PORT_ACTIVE
)
1561 cma_dev
= list_entry(dev_list
.next
, struct cma_device
, list
);
1564 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
);
1568 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
1572 ib_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1573 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
1574 id_priv
->id
.port_num
= p
;
1575 cma_attach_to_dev(id_priv
, cma_dev
);
1577 mutex_unlock(&lock
);
1581 static void addr_handler(int status
, struct sockaddr
*src_addr
,
1582 struct rdma_dev_addr
*dev_addr
, void *context
)
1584 struct rdma_id_private
*id_priv
= context
;
1585 struct rdma_cm_event event
;
1587 memset(&event
, 0, sizeof event
);
1588 atomic_inc(&id_priv
->dev_remove
);
1591 * Grab mutex to block rdma_destroy_id() from removing the device while
1592 * we're trying to acquire it.
1595 if (!cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_RESOLVED
)) {
1596 mutex_unlock(&lock
);
1600 if (!status
&& !id_priv
->cma_dev
)
1601 status
= cma_acquire_dev(id_priv
);
1602 mutex_unlock(&lock
);
1605 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ADDR_BOUND
))
1607 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
1608 event
.status
= status
;
1610 memcpy(&id_priv
->id
.route
.addr
.src_addr
, src_addr
,
1611 ip_addr_size(src_addr
));
1612 event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1615 if (id_priv
->id
.event_handler(&id_priv
->id
, &event
)) {
1616 cma_exch(id_priv
, CMA_DESTROYING
);
1617 cma_release_remove(id_priv
);
1618 cma_deref_id(id_priv
);
1619 rdma_destroy_id(&id_priv
->id
);
1623 cma_release_remove(id_priv
);
1624 cma_deref_id(id_priv
);
1627 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
1629 struct cma_work
*work
;
1630 struct sockaddr_in
*src_in
, *dst_in
;
1634 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1638 if (!id_priv
->cma_dev
) {
1639 ret
= cma_bind_loopback(id_priv
);
1644 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1645 ib_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1647 if (cma_zero_addr(&id_priv
->id
.route
.addr
.src_addr
)) {
1648 src_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.src_addr
;
1649 dst_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.dst_addr
;
1650 src_in
->sin_family
= dst_in
->sin_family
;
1651 src_in
->sin_addr
.s_addr
= dst_in
->sin_addr
.s_addr
;
1655 INIT_WORK(&work
->work
, cma_work_handler
);
1656 work
->old_state
= CMA_ADDR_QUERY
;
1657 work
->new_state
= CMA_ADDR_RESOLVED
;
1658 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1659 queue_work(cma_wq
, &work
->work
);
1666 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1667 struct sockaddr
*dst_addr
)
1669 if (src_addr
&& src_addr
->sa_family
)
1670 return rdma_bind_addr(id
, src_addr
);
1672 return cma_bind_any(id
, dst_addr
->sa_family
);
1675 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1676 struct sockaddr
*dst_addr
, int timeout_ms
)
1678 struct rdma_id_private
*id_priv
;
1681 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1682 if (id_priv
->state
== CMA_IDLE
) {
1683 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
1688 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_ADDR_QUERY
))
1691 atomic_inc(&id_priv
->refcount
);
1692 memcpy(&id
->route
.addr
.dst_addr
, dst_addr
, ip_addr_size(dst_addr
));
1693 if (cma_any_addr(dst_addr
))
1694 ret
= cma_resolve_loopback(id_priv
);
1696 ret
= rdma_resolve_ip(&addr_client
, &id
->route
.addr
.src_addr
,
1697 dst_addr
, &id
->route
.addr
.dev_addr
,
1698 timeout_ms
, addr_handler
, id_priv
);
1704 cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_BOUND
);
1705 cma_deref_id(id_priv
);
1708 EXPORT_SYMBOL(rdma_resolve_addr
);
1710 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
1711 struct rdma_id_private
*id_priv
)
1713 struct sockaddr_in
*sin
;
1715 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1716 sin
->sin_port
= htons(bind_list
->port
);
1717 id_priv
->bind_list
= bind_list
;
1718 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
1721 static int cma_alloc_port(struct idr
*ps
, struct rdma_id_private
*id_priv
,
1722 unsigned short snum
)
1724 struct rdma_bind_list
*bind_list
;
1725 int port
, start
, ret
;
1727 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1731 start
= snum
? snum
: sysctl_local_port_range
[0];
1734 ret
= idr_get_new_above(ps
, bind_list
, start
, &port
);
1735 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1740 if ((snum
&& port
!= snum
) ||
1741 (!snum
&& port
> sysctl_local_port_range
[1])) {
1742 idr_remove(ps
, port
);
1743 ret
= -EADDRNOTAVAIL
;
1748 bind_list
->port
= (unsigned short) port
;
1749 cma_bind_port(bind_list
, id_priv
);
1756 static int cma_use_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1758 struct rdma_id_private
*cur_id
;
1759 struct sockaddr_in
*sin
, *cur_sin
;
1760 struct rdma_bind_list
*bind_list
;
1761 struct hlist_node
*node
;
1762 unsigned short snum
;
1764 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1765 snum
= ntohs(sin
->sin_port
);
1766 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
1769 bind_list
= idr_find(ps
, snum
);
1771 return cma_alloc_port(ps
, id_priv
, snum
);
1774 * We don't support binding to any address if anyone is bound to
1775 * a specific address on the same port.
1777 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
))
1778 return -EADDRNOTAVAIL
;
1780 hlist_for_each_entry(cur_id
, node
, &bind_list
->owners
, node
) {
1781 if (cma_any_addr(&cur_id
->id
.route
.addr
.src_addr
))
1782 return -EADDRNOTAVAIL
;
1784 cur_sin
= (struct sockaddr_in
*) &cur_id
->id
.route
.addr
.src_addr
;
1785 if (sin
->sin_addr
.s_addr
== cur_sin
->sin_addr
.s_addr
)
1789 cma_bind_port(bind_list
, id_priv
);
1793 static int cma_get_port(struct rdma_id_private
*id_priv
)
1798 switch (id_priv
->id
.ps
) {
1809 return -EPROTONOSUPPORT
;
1813 if (cma_any_port(&id_priv
->id
.route
.addr
.src_addr
))
1814 ret
= cma_alloc_port(ps
, id_priv
, 0);
1816 ret
= cma_use_port(ps
, id_priv
);
1817 mutex_unlock(&lock
);
1822 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
1824 struct rdma_id_private
*id_priv
;
1827 if (addr
->sa_family
!= AF_INET
)
1828 return -EAFNOSUPPORT
;
1830 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1831 if (!cma_comp_exch(id_priv
, CMA_IDLE
, CMA_ADDR_BOUND
))
1834 if (!cma_any_addr(addr
)) {
1835 ret
= rdma_translate_ip(addr
, &id
->route
.addr
.dev_addr
);
1840 ret
= cma_acquire_dev(id_priv
);
1841 mutex_unlock(&lock
);
1846 memcpy(&id
->route
.addr
.src_addr
, addr
, ip_addr_size(addr
));
1847 ret
= cma_get_port(id_priv
);
1853 if (!cma_any_addr(addr
)) {
1855 cma_detach_from_dev(id_priv
);
1856 mutex_unlock(&lock
);
1859 cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_IDLE
);
1862 EXPORT_SYMBOL(rdma_bind_addr
);
1864 static int cma_format_hdr(void *hdr
, enum rdma_port_space ps
,
1865 struct rdma_route
*route
)
1867 struct sockaddr_in
*src4
, *dst4
;
1868 struct cma_hdr
*cma_hdr
;
1869 struct sdp_hh
*sdp_hdr
;
1871 src4
= (struct sockaddr_in
*) &route
->addr
.src_addr
;
1872 dst4
= (struct sockaddr_in
*) &route
->addr
.dst_addr
;
1877 if (sdp_get_majv(sdp_hdr
->sdp_version
) != SDP_MAJ_VERSION
)
1879 sdp_set_ip_ver(sdp_hdr
, 4);
1880 sdp_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
1881 sdp_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
1882 sdp_hdr
->port
= src4
->sin_port
;
1886 cma_hdr
->cma_version
= CMA_VERSION
;
1887 cma_set_ip_ver(cma_hdr
, 4);
1888 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
1889 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
1890 cma_hdr
->port
= src4
->sin_port
;
1896 static int cma_sidr_rep_handler(struct ib_cm_id
*cm_id
,
1897 struct ib_cm_event
*ib_event
)
1899 struct rdma_id_private
*id_priv
= cm_id
->context
;
1900 struct rdma_cm_event event
;
1901 struct ib_cm_sidr_rep_event_param
*rep
= &ib_event
->param
.sidr_rep_rcvd
;
1904 memset(&event
, 0, sizeof event
);
1905 atomic_inc(&id_priv
->dev_remove
);
1906 if (!cma_comp(id_priv
, CMA_CONNECT
))
1909 switch (ib_event
->event
) {
1910 case IB_CM_SIDR_REQ_ERROR
:
1911 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1912 event
.status
= -ETIMEDOUT
;
1914 case IB_CM_SIDR_REP_RECEIVED
:
1915 event
.param
.ud
.private_data
= ib_event
->private_data
;
1916 event
.param
.ud
.private_data_len
= IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
;
1917 if (rep
->status
!= IB_SIDR_SUCCESS
) {
1918 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1919 event
.status
= ib_event
->param
.sidr_rep_rcvd
.status
;
1922 if (rep
->qkey
!= RDMA_UD_QKEY
) {
1923 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1924 event
.status
= -EINVAL
;
1927 ib_init_ah_from_path(id_priv
->id
.device
, id_priv
->id
.port_num
,
1928 id_priv
->id
.route
.path_rec
,
1929 &event
.param
.ud
.ah_attr
);
1930 event
.param
.ud
.qp_num
= rep
->qpn
;
1931 event
.param
.ud
.qkey
= rep
->qkey
;
1932 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1936 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
1941 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
1943 /* Destroy the CM ID by returning a non-zero value. */
1944 id_priv
->cm_id
.ib
= NULL
;
1945 cma_exch(id_priv
, CMA_DESTROYING
);
1946 cma_release_remove(id_priv
);
1947 rdma_destroy_id(&id_priv
->id
);
1951 cma_release_remove(id_priv
);
1955 static int cma_resolve_ib_udp(struct rdma_id_private
*id_priv
,
1956 struct rdma_conn_param
*conn_param
)
1958 struct ib_cm_sidr_req_param req
;
1959 struct rdma_route
*route
;
1962 req
.private_data_len
= sizeof(struct cma_hdr
) +
1963 conn_param
->private_data_len
;
1964 req
.private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
1965 if (!req
.private_data
)
1968 if (conn_param
->private_data
&& conn_param
->private_data_len
)
1969 memcpy((void *) req
.private_data
+ sizeof(struct cma_hdr
),
1970 conn_param
->private_data
, conn_param
->private_data_len
);
1972 route
= &id_priv
->id
.route
;
1973 ret
= cma_format_hdr((void *) req
.private_data
, id_priv
->id
.ps
, route
);
1977 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
,
1978 cma_sidr_rep_handler
, id_priv
);
1979 if (IS_ERR(id_priv
->cm_id
.ib
)) {
1980 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
1984 req
.path
= route
->path_rec
;
1985 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
1986 &route
->addr
.dst_addr
);
1987 req
.timeout_ms
= 1 << (CMA_CM_RESPONSE_TIMEOUT
- 8);
1988 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
1990 ret
= ib_send_cm_sidr_req(id_priv
->cm_id
.ib
, &req
);
1992 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1993 id_priv
->cm_id
.ib
= NULL
;
1996 kfree(req
.private_data
);
2000 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
2001 struct rdma_conn_param
*conn_param
)
2003 struct ib_cm_req_param req
;
2004 struct rdma_route
*route
;
2008 memset(&req
, 0, sizeof req
);
2009 offset
= cma_user_data_offset(id_priv
->id
.ps
);
2010 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
2011 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2015 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2016 memcpy(private_data
+ offset
, conn_param
->private_data
,
2017 conn_param
->private_data_len
);
2019 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
,
2021 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2022 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2026 route
= &id_priv
->id
.route
;
2027 ret
= cma_format_hdr(private_data
, id_priv
->id
.ps
, route
);
2030 req
.private_data
= private_data
;
2032 req
.primary_path
= &route
->path_rec
[0];
2033 if (route
->num_paths
== 2)
2034 req
.alternate_path
= &route
->path_rec
[1];
2036 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2037 &route
->addr
.dst_addr
);
2038 req
.qp_num
= id_priv
->qp_num
;
2039 req
.qp_type
= IB_QPT_RC
;
2040 req
.starting_psn
= id_priv
->seq_num
;
2041 req
.responder_resources
= conn_param
->responder_resources
;
2042 req
.initiator_depth
= conn_param
->initiator_depth
;
2043 req
.flow_control
= conn_param
->flow_control
;
2044 req
.retry_count
= conn_param
->retry_count
;
2045 req
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2046 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2047 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2048 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2049 req
.srq
= id_priv
->srq
? 1 : 0;
2051 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
2053 if (ret
&& !IS_ERR(id_priv
->cm_id
.ib
)) {
2054 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2055 id_priv
->cm_id
.ib
= NULL
;
2058 kfree(private_data
);
2062 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
2063 struct rdma_conn_param
*conn_param
)
2065 struct iw_cm_id
*cm_id
;
2066 struct sockaddr_in
* sin
;
2068 struct iw_cm_conn_param iw_param
;
2070 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
2071 if (IS_ERR(cm_id
)) {
2072 ret
= PTR_ERR(cm_id
);
2076 id_priv
->cm_id
.iw
= cm_id
;
2078 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
2079 cm_id
->local_addr
= *sin
;
2081 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
2082 cm_id
->remote_addr
= *sin
;
2084 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2088 iw_param
.ord
= conn_param
->initiator_depth
;
2089 iw_param
.ird
= conn_param
->responder_resources
;
2090 iw_param
.private_data
= conn_param
->private_data
;
2091 iw_param
.private_data_len
= conn_param
->private_data_len
;
2093 iw_param
.qpn
= id_priv
->qp_num
;
2095 iw_param
.qpn
= conn_param
->qp_num
;
2096 ret
= iw_cm_connect(cm_id
, &iw_param
);
2098 if (ret
&& !IS_ERR(cm_id
)) {
2099 iw_destroy_cm_id(cm_id
);
2100 id_priv
->cm_id
.iw
= NULL
;
2105 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2107 struct rdma_id_private
*id_priv
;
2110 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2111 if (!cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_CONNECT
))
2115 id_priv
->qp_num
= conn_param
->qp_num
;
2116 id_priv
->srq
= conn_param
->srq
;
2119 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2120 case RDMA_TRANSPORT_IB
:
2121 if (id
->ps
== RDMA_PS_UDP
)
2122 ret
= cma_resolve_ib_udp(id_priv
, conn_param
);
2124 ret
= cma_connect_ib(id_priv
, conn_param
);
2126 case RDMA_TRANSPORT_IWARP
:
2127 ret
= cma_connect_iw(id_priv
, conn_param
);
2138 cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_ROUTE_RESOLVED
);
2141 EXPORT_SYMBOL(rdma_connect
);
2143 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
2144 struct rdma_conn_param
*conn_param
)
2146 struct ib_cm_rep_param rep
;
2147 struct ib_qp_attr qp_attr
;
2148 int qp_attr_mask
, ret
;
2150 if (id_priv
->id
.qp
) {
2151 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2155 qp_attr
.qp_state
= IB_QPS_RTS
;
2156 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, &qp_attr
,
2161 qp_attr
.max_rd_atomic
= conn_param
->initiator_depth
;
2162 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
2167 memset(&rep
, 0, sizeof rep
);
2168 rep
.qp_num
= id_priv
->qp_num
;
2169 rep
.starting_psn
= id_priv
->seq_num
;
2170 rep
.private_data
= conn_param
->private_data
;
2171 rep
.private_data_len
= conn_param
->private_data_len
;
2172 rep
.responder_resources
= conn_param
->responder_resources
;
2173 rep
.initiator_depth
= conn_param
->initiator_depth
;
2174 rep
.target_ack_delay
= CMA_CM_RESPONSE_TIMEOUT
;
2175 rep
.failover_accepted
= 0;
2176 rep
.flow_control
= conn_param
->flow_control
;
2177 rep
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2178 rep
.srq
= id_priv
->srq
? 1 : 0;
2180 ret
= ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
2185 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
2186 struct rdma_conn_param
*conn_param
)
2188 struct iw_cm_conn_param iw_param
;
2191 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2195 iw_param
.ord
= conn_param
->initiator_depth
;
2196 iw_param
.ird
= conn_param
->responder_resources
;
2197 iw_param
.private_data
= conn_param
->private_data
;
2198 iw_param
.private_data_len
= conn_param
->private_data_len
;
2199 if (id_priv
->id
.qp
) {
2200 iw_param
.qpn
= id_priv
->qp_num
;
2202 iw_param
.qpn
= conn_param
->qp_num
;
2204 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
2207 static int cma_send_sidr_rep(struct rdma_id_private
*id_priv
,
2208 enum ib_cm_sidr_status status
,
2209 const void *private_data
, int private_data_len
)
2211 struct ib_cm_sidr_rep_param rep
;
2213 memset(&rep
, 0, sizeof rep
);
2214 rep
.status
= status
;
2215 if (status
== IB_SIDR_SUCCESS
) {
2216 rep
.qp_num
= id_priv
->qp_num
;
2217 rep
.qkey
= RDMA_UD_QKEY
;
2219 rep
.private_data
= private_data
;
2220 rep
.private_data_len
= private_data_len
;
2222 return ib_send_cm_sidr_rep(id_priv
->cm_id
.ib
, &rep
);
2225 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2227 struct rdma_id_private
*id_priv
;
2230 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2231 if (!cma_comp(id_priv
, CMA_CONNECT
))
2234 if (!id
->qp
&& conn_param
) {
2235 id_priv
->qp_num
= conn_param
->qp_num
;
2236 id_priv
->srq
= conn_param
->srq
;
2239 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2240 case RDMA_TRANSPORT_IB
:
2241 if (id
->ps
== RDMA_PS_UDP
)
2242 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
2243 conn_param
->private_data
,
2244 conn_param
->private_data_len
);
2245 else if (conn_param
)
2246 ret
= cma_accept_ib(id_priv
, conn_param
);
2248 ret
= cma_rep_recv(id_priv
);
2250 case RDMA_TRANSPORT_IWARP
:
2251 ret
= cma_accept_iw(id_priv
, conn_param
);
2263 cma_modify_qp_err(id
);
2264 rdma_reject(id
, NULL
, 0);
2267 EXPORT_SYMBOL(rdma_accept
);
2269 int rdma_notify(struct rdma_cm_id
*id
, enum ib_event_type event
)
2271 struct rdma_id_private
*id_priv
;
2274 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2275 if (!cma_comp(id_priv
, CMA_CONNECT
))
2278 switch (id
->device
->node_type
) {
2279 case RDMA_NODE_IB_CA
:
2280 ret
= ib_cm_notify(id_priv
->cm_id
.ib
, event
);
2288 EXPORT_SYMBOL(rdma_notify
);
2290 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
2291 u8 private_data_len
)
2293 struct rdma_id_private
*id_priv
;
2296 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2297 if (!cma_comp(id_priv
, CMA_CONNECT
))
2300 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2301 case RDMA_TRANSPORT_IB
:
2302 if (id
->ps
== RDMA_PS_UDP
)
2303 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_REJECT
,
2304 private_data
, private_data_len
);
2306 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
2307 IB_CM_REJ_CONSUMER_DEFINED
, NULL
,
2308 0, private_data
, private_data_len
);
2310 case RDMA_TRANSPORT_IWARP
:
2311 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
2312 private_data
, private_data_len
);
2320 EXPORT_SYMBOL(rdma_reject
);
2322 int rdma_disconnect(struct rdma_cm_id
*id
)
2324 struct rdma_id_private
*id_priv
;
2327 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2328 if (!cma_comp(id_priv
, CMA_CONNECT
) &&
2329 !cma_comp(id_priv
, CMA_DISCONNECT
))
2332 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2333 case RDMA_TRANSPORT_IB
:
2334 ret
= cma_modify_qp_err(id
);
2337 /* Initiate or respond to a disconnect. */
2338 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
2339 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
2341 case RDMA_TRANSPORT_IWARP
:
2342 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
2351 EXPORT_SYMBOL(rdma_disconnect
);
2353 static void cma_add_one(struct ib_device
*device
)
2355 struct cma_device
*cma_dev
;
2356 struct rdma_id_private
*id_priv
;
2358 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
2362 cma_dev
->device
= device
;
2363 cma_dev
->node_guid
= device
->node_guid
;
2365 init_completion(&cma_dev
->comp
);
2366 atomic_set(&cma_dev
->refcount
, 1);
2367 INIT_LIST_HEAD(&cma_dev
->id_list
);
2368 ib_set_client_data(device
, &cma_client
, cma_dev
);
2371 list_add_tail(&cma_dev
->list
, &dev_list
);
2372 list_for_each_entry(id_priv
, &listen_any_list
, list
)
2373 cma_listen_on_dev(id_priv
, cma_dev
);
2374 mutex_unlock(&lock
);
2377 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
2379 struct rdma_cm_event event
;
2380 enum cma_state state
;
2382 /* Record that we want to remove the device */
2383 state
= cma_exch(id_priv
, CMA_DEVICE_REMOVAL
);
2384 if (state
== CMA_DESTROYING
)
2387 cma_cancel_operation(id_priv
, state
);
2388 wait_event(id_priv
->wait_remove
, !atomic_read(&id_priv
->dev_remove
));
2390 /* Check for destruction from another callback. */
2391 if (!cma_comp(id_priv
, CMA_DEVICE_REMOVAL
))
2394 memset(&event
, 0, sizeof event
);
2395 event
.event
= RDMA_CM_EVENT_DEVICE_REMOVAL
;
2396 return id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2399 static void cma_process_remove(struct cma_device
*cma_dev
)
2401 struct rdma_id_private
*id_priv
;
2405 while (!list_empty(&cma_dev
->id_list
)) {
2406 id_priv
= list_entry(cma_dev
->id_list
.next
,
2407 struct rdma_id_private
, list
);
2409 if (cma_internal_listen(id_priv
)) {
2410 cma_destroy_listen(id_priv
);
2414 list_del_init(&id_priv
->list
);
2415 atomic_inc(&id_priv
->refcount
);
2416 mutex_unlock(&lock
);
2418 ret
= cma_remove_id_dev(id_priv
);
2419 cma_deref_id(id_priv
);
2421 rdma_destroy_id(&id_priv
->id
);
2425 mutex_unlock(&lock
);
2427 cma_deref_dev(cma_dev
);
2428 wait_for_completion(&cma_dev
->comp
);
2431 static void cma_remove_one(struct ib_device
*device
)
2433 struct cma_device
*cma_dev
;
2435 cma_dev
= ib_get_client_data(device
, &cma_client
);
2440 list_del(&cma_dev
->list
);
2441 mutex_unlock(&lock
);
2443 cma_process_remove(cma_dev
);
2447 static int cma_init(void)
2451 cma_wq
= create_singlethread_workqueue("rdma_cm_wq");
2455 ib_sa_register_client(&sa_client
);
2456 rdma_addr_register_client(&addr_client
);
2458 ret
= ib_register_client(&cma_client
);
2464 rdma_addr_unregister_client(&addr_client
);
2465 ib_sa_unregister_client(&sa_client
);
2466 destroy_workqueue(cma_wq
);
2470 static void cma_cleanup(void)
2472 ib_unregister_client(&cma_client
);
2473 rdma_addr_unregister_client(&addr_client
);
2474 ib_sa_unregister_client(&sa_client
);
2475 destroy_workqueue(cma_wq
);
2476 idr_destroy(&sdp_ps
);
2477 idr_destroy(&tcp_ps
);
2478 idr_destroy(&udp_ps
);
2481 module_init(cma_init
);
2482 module_exit(cma_cleanup
);