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 LIST_HEAD(dev_list
);
66 static LIST_HEAD(listen_any_list
);
67 static DEFINE_MUTEX(lock
);
68 static struct workqueue_struct
*cma_wq
;
69 static DEFINE_IDR(sdp_ps
);
70 static DEFINE_IDR(tcp_ps
);
73 struct list_head list
;
74 struct ib_device
*device
;
76 struct completion comp
;
78 struct list_head id_list
;
95 struct rdma_bind_list
{
97 struct hlist_head owners
;
102 * Device removal can occur at anytime, so we need extra handling to
103 * serialize notifying the user of device removal with other callbacks.
104 * We do this by disabling removal notification while a callback is in process,
105 * and reporting it after the callback completes.
107 struct rdma_id_private
{
108 struct rdma_cm_id id
;
110 struct rdma_bind_list
*bind_list
;
111 struct hlist_node node
;
112 struct list_head list
;
113 struct list_head listen_list
;
114 struct cma_device
*cma_dev
;
116 enum cma_state state
;
118 struct completion comp
;
120 wait_queue_head_t wait_remove
;
125 struct ib_sa_query
*query
;
134 enum ib_qp_type qp_type
;
139 struct work_struct work
;
140 struct rdma_id_private
*id
;
141 enum cma_state old_state
;
142 enum cma_state new_state
;
143 struct rdma_cm_event event
;
156 u8 ip_version
; /* IP version: 7:4 */
158 union cma_ip_addr src_addr
;
159 union cma_ip_addr dst_addr
;
164 u8 sdp_version
; /* Major version: 7:4 */
165 u8 ip_version
; /* IP version: 7:4 */
166 u8 sdp_specific1
[10];
169 union cma_ip_addr src_addr
;
170 union cma_ip_addr dst_addr
;
178 #define CMA_VERSION 0x00
179 #define SDP_MAJ_VERSION 0x2
181 static int cma_comp(struct rdma_id_private
*id_priv
, enum cma_state comp
)
186 spin_lock_irqsave(&id_priv
->lock
, flags
);
187 ret
= (id_priv
->state
== comp
);
188 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
192 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
193 enum cma_state comp
, enum cma_state exch
)
198 spin_lock_irqsave(&id_priv
->lock
, flags
);
199 if ((ret
= (id_priv
->state
== comp
)))
200 id_priv
->state
= exch
;
201 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
205 static enum cma_state
cma_exch(struct rdma_id_private
*id_priv
,
211 spin_lock_irqsave(&id_priv
->lock
, flags
);
212 old
= id_priv
->state
;
213 id_priv
->state
= exch
;
214 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
218 static inline u8
cma_get_ip_ver(struct cma_hdr
*hdr
)
220 return hdr
->ip_version
>> 4;
223 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
225 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
228 static inline u8
sdp_get_majv(u8 sdp_version
)
230 return sdp_version
>> 4;
233 static inline u8
sdp_get_ip_ver(struct sdp_hh
*hh
)
235 return hh
->ip_version
>> 4;
238 static inline void sdp_set_ip_ver(struct sdp_hh
*hh
, u8 ip_ver
)
240 hh
->ip_version
= (ip_ver
<< 4) | (hh
->ip_version
& 0xF);
243 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
244 struct cma_device
*cma_dev
)
246 atomic_inc(&cma_dev
->refcount
);
247 id_priv
->cma_dev
= cma_dev
;
248 id_priv
->id
.device
= cma_dev
->device
;
249 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
252 static inline void cma_deref_dev(struct cma_device
*cma_dev
)
254 if (atomic_dec_and_test(&cma_dev
->refcount
))
255 complete(&cma_dev
->comp
);
258 static void cma_detach_from_dev(struct rdma_id_private
*id_priv
)
260 list_del(&id_priv
->list
);
261 cma_deref_dev(id_priv
->cma_dev
);
262 id_priv
->cma_dev
= NULL
;
265 static int cma_acquire_dev(struct rdma_id_private
*id_priv
)
267 enum rdma_node_type dev_type
= id_priv
->id
.route
.addr
.dev_addr
.dev_type
;
268 struct cma_device
*cma_dev
;
272 switch (rdma_node_get_transport(dev_type
)) {
273 case RDMA_TRANSPORT_IB
:
274 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
276 case RDMA_TRANSPORT_IWARP
:
277 iw_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
283 list_for_each_entry(cma_dev
, &dev_list
, list
) {
284 ret
= ib_find_cached_gid(cma_dev
->device
, &gid
,
285 &id_priv
->id
.port_num
, NULL
);
287 cma_attach_to_dev(id_priv
, cma_dev
);
295 static void cma_deref_id(struct rdma_id_private
*id_priv
)
297 if (atomic_dec_and_test(&id_priv
->refcount
))
298 complete(&id_priv
->comp
);
301 static void cma_release_remove(struct rdma_id_private
*id_priv
)
303 if (atomic_dec_and_test(&id_priv
->dev_remove
))
304 wake_up(&id_priv
->wait_remove
);
307 struct rdma_cm_id
*rdma_create_id(rdma_cm_event_handler event_handler
,
308 void *context
, enum rdma_port_space ps
)
310 struct rdma_id_private
*id_priv
;
312 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
314 return ERR_PTR(-ENOMEM
);
316 id_priv
->state
= CMA_IDLE
;
317 id_priv
->id
.context
= context
;
318 id_priv
->id
.event_handler
= event_handler
;
320 spin_lock_init(&id_priv
->lock
);
321 init_completion(&id_priv
->comp
);
322 atomic_set(&id_priv
->refcount
, 1);
323 init_waitqueue_head(&id_priv
->wait_remove
);
324 atomic_set(&id_priv
->dev_remove
, 0);
325 INIT_LIST_HEAD(&id_priv
->listen_list
);
326 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
330 EXPORT_SYMBOL(rdma_create_id
);
332 static int cma_init_ib_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
334 struct ib_qp_attr qp_attr
;
335 struct rdma_dev_addr
*dev_addr
;
338 dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
339 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
340 ib_addr_get_pkey(dev_addr
),
341 &qp_attr
.pkey_index
);
345 qp_attr
.qp_state
= IB_QPS_INIT
;
346 qp_attr
.qp_access_flags
= IB_ACCESS_LOCAL_WRITE
;
347 qp_attr
.port_num
= id_priv
->id
.port_num
;
348 return ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_ACCESS_FLAGS
|
349 IB_QP_PKEY_INDEX
| IB_QP_PORT
);
352 static int cma_init_iw_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
354 struct ib_qp_attr qp_attr
;
356 qp_attr
.qp_state
= IB_QPS_INIT
;
357 qp_attr
.qp_access_flags
= IB_ACCESS_LOCAL_WRITE
;
359 return ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_ACCESS_FLAGS
);
362 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
363 struct ib_qp_init_attr
*qp_init_attr
)
365 struct rdma_id_private
*id_priv
;
369 id_priv
= container_of(id
, struct rdma_id_private
, id
);
370 if (id
->device
!= pd
->device
)
373 qp
= ib_create_qp(pd
, qp_init_attr
);
377 switch (rdma_node_get_transport(id
->device
->node_type
)) {
378 case RDMA_TRANSPORT_IB
:
379 ret
= cma_init_ib_qp(id_priv
, qp
);
381 case RDMA_TRANSPORT_IWARP
:
382 ret
= cma_init_iw_qp(id_priv
, qp
);
393 id_priv
->qp_num
= qp
->qp_num
;
394 id_priv
->qp_type
= qp
->qp_type
;
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 int cma_any_port(struct sockaddr
*addr
)
514 return !((struct sockaddr_in
*) addr
)->sin_port
;
517 static int cma_get_net_info(void *hdr
, enum rdma_port_space ps
,
518 u8
*ip_ver
, __u16
*port
,
519 union cma_ip_addr
**src
, union cma_ip_addr
**dst
)
523 if (sdp_get_majv(((struct sdp_hh
*) hdr
)->sdp_version
) !=
527 *ip_ver
= sdp_get_ip_ver(hdr
);
528 *port
= ((struct sdp_hh
*) hdr
)->port
;
529 *src
= &((struct sdp_hh
*) hdr
)->src_addr
;
530 *dst
= &((struct sdp_hh
*) hdr
)->dst_addr
;
533 if (((struct cma_hdr
*) hdr
)->cma_version
!= CMA_VERSION
)
536 *ip_ver
= cma_get_ip_ver(hdr
);
537 *port
= ((struct cma_hdr
*) hdr
)->port
;
538 *src
= &((struct cma_hdr
*) hdr
)->src_addr
;
539 *dst
= &((struct cma_hdr
*) hdr
)->dst_addr
;
543 if (*ip_ver
!= 4 && *ip_ver
!= 6)
548 static void cma_save_net_info(struct rdma_addr
*addr
,
549 struct rdma_addr
*listen_addr
,
550 u8 ip_ver
, __u16 port
,
551 union cma_ip_addr
*src
, union cma_ip_addr
*dst
)
553 struct sockaddr_in
*listen4
, *ip4
;
554 struct sockaddr_in6
*listen6
, *ip6
;
558 listen4
= (struct sockaddr_in
*) &listen_addr
->src_addr
;
559 ip4
= (struct sockaddr_in
*) &addr
->src_addr
;
560 ip4
->sin_family
= listen4
->sin_family
;
561 ip4
->sin_addr
.s_addr
= dst
->ip4
.addr
;
562 ip4
->sin_port
= listen4
->sin_port
;
564 ip4
= (struct sockaddr_in
*) &addr
->dst_addr
;
565 ip4
->sin_family
= listen4
->sin_family
;
566 ip4
->sin_addr
.s_addr
= src
->ip4
.addr
;
567 ip4
->sin_port
= port
;
570 listen6
= (struct sockaddr_in6
*) &listen_addr
->src_addr
;
571 ip6
= (struct sockaddr_in6
*) &addr
->src_addr
;
572 ip6
->sin6_family
= listen6
->sin6_family
;
573 ip6
->sin6_addr
= dst
->ip6
;
574 ip6
->sin6_port
= listen6
->sin6_port
;
576 ip6
= (struct sockaddr_in6
*) &addr
->dst_addr
;
577 ip6
->sin6_family
= listen6
->sin6_family
;
578 ip6
->sin6_addr
= src
->ip6
;
579 ip6
->sin6_port
= port
;
586 static inline int cma_user_data_offset(enum rdma_port_space ps
)
592 return sizeof(struct cma_hdr
);
596 static int cma_notify_user(struct rdma_id_private
*id_priv
,
597 enum rdma_cm_event_type type
, int status
,
598 void *data
, u8 data_len
)
600 struct rdma_cm_event event
;
603 event
.status
= status
;
604 event
.private_data
= data
;
605 event
.private_data_len
= data_len
;
607 return id_priv
->id
.event_handler(&id_priv
->id
, &event
);
610 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
612 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
613 case RDMA_TRANSPORT_IB
:
615 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
622 static inline int cma_internal_listen(struct rdma_id_private
*id_priv
)
624 return (id_priv
->state
== CMA_LISTEN
) && id_priv
->cma_dev
&&
625 cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
);
628 static void cma_destroy_listen(struct rdma_id_private
*id_priv
)
630 cma_exch(id_priv
, CMA_DESTROYING
);
632 if (id_priv
->cma_dev
) {
633 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
634 case RDMA_TRANSPORT_IB
:
635 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
636 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
638 case RDMA_TRANSPORT_IWARP
:
639 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
640 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
645 cma_detach_from_dev(id_priv
);
647 list_del(&id_priv
->listen_list
);
649 cma_deref_id(id_priv
);
650 wait_for_completion(&id_priv
->comp
);
655 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
657 struct rdma_id_private
*dev_id_priv
;
660 list_del(&id_priv
->list
);
662 while (!list_empty(&id_priv
->listen_list
)) {
663 dev_id_priv
= list_entry(id_priv
->listen_list
.next
,
664 struct rdma_id_private
, listen_list
);
665 cma_destroy_listen(dev_id_priv
);
670 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
671 enum cma_state state
)
675 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
677 case CMA_ROUTE_QUERY
:
678 cma_cancel_route(id_priv
);
681 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
) &&
683 cma_cancel_listens(id_priv
);
690 static void cma_release_port(struct rdma_id_private
*id_priv
)
692 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
698 hlist_del(&id_priv
->node
);
699 if (hlist_empty(&bind_list
->owners
)) {
700 idr_remove(bind_list
->ps
, bind_list
->port
);
706 void rdma_destroy_id(struct rdma_cm_id
*id
)
708 struct rdma_id_private
*id_priv
;
709 enum cma_state state
;
711 id_priv
= container_of(id
, struct rdma_id_private
, id
);
712 state
= cma_exch(id_priv
, CMA_DESTROYING
);
713 cma_cancel_operation(id_priv
, state
);
715 if (id_priv
->cma_dev
) {
716 switch (rdma_node_get_transport(id
->device
->node_type
)) {
717 case RDMA_TRANSPORT_IB
:
718 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
719 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
721 case RDMA_TRANSPORT_IWARP
:
722 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
723 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
729 cma_detach_from_dev(id_priv
);
733 cma_release_port(id_priv
);
734 cma_deref_id(id_priv
);
735 wait_for_completion(&id_priv
->comp
);
737 kfree(id_priv
->id
.route
.path_rec
);
740 EXPORT_SYMBOL(rdma_destroy_id
);
742 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
746 ret
= cma_modify_qp_rtr(&id_priv
->id
);
750 ret
= cma_modify_qp_rts(&id_priv
->id
);
754 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
760 cma_modify_qp_err(&id_priv
->id
);
761 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
766 static int cma_verify_rep(struct rdma_id_private
*id_priv
, void *data
)
768 if (id_priv
->id
.ps
== RDMA_PS_SDP
&&
769 sdp_get_majv(((struct sdp_hah
*) data
)->sdp_version
) !=
776 static int cma_rtu_recv(struct rdma_id_private
*id_priv
)
780 ret
= cma_modify_qp_rts(&id_priv
->id
);
786 cma_modify_qp_err(&id_priv
->id
);
787 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
792 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
794 struct rdma_id_private
*id_priv
= cm_id
->context
;
795 enum rdma_cm_event_type event
;
796 u8 private_data_len
= 0;
797 int ret
= 0, status
= 0;
799 atomic_inc(&id_priv
->dev_remove
);
800 if (!cma_comp(id_priv
, CMA_CONNECT
))
803 switch (ib_event
->event
) {
804 case IB_CM_REQ_ERROR
:
805 case IB_CM_REP_ERROR
:
806 event
= RDMA_CM_EVENT_UNREACHABLE
;
809 case IB_CM_REP_RECEIVED
:
810 status
= cma_verify_rep(id_priv
, ib_event
->private_data
);
812 event
= RDMA_CM_EVENT_CONNECT_ERROR
;
813 else if (id_priv
->id
.qp
&& id_priv
->id
.ps
!= RDMA_PS_SDP
) {
814 status
= cma_rep_recv(id_priv
);
815 event
= status
? RDMA_CM_EVENT_CONNECT_ERROR
:
816 RDMA_CM_EVENT_ESTABLISHED
;
818 event
= RDMA_CM_EVENT_CONNECT_RESPONSE
;
819 private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
821 case IB_CM_RTU_RECEIVED
:
822 status
= cma_rtu_recv(id_priv
);
823 event
= status
? RDMA_CM_EVENT_CONNECT_ERROR
:
824 RDMA_CM_EVENT_ESTABLISHED
;
826 case IB_CM_DREQ_ERROR
:
827 status
= -ETIMEDOUT
; /* fall through */
828 case IB_CM_DREQ_RECEIVED
:
829 case IB_CM_DREP_RECEIVED
:
830 if (!cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_DISCONNECT
))
832 event
= RDMA_CM_EVENT_DISCONNECTED
;
834 case IB_CM_TIMEWAIT_EXIT
:
835 case IB_CM_MRA_RECEIVED
:
838 case IB_CM_REJ_RECEIVED
:
839 cma_modify_qp_err(&id_priv
->id
);
840 status
= ib_event
->param
.rej_rcvd
.reason
;
841 event
= RDMA_CM_EVENT_REJECTED
;
842 private_data_len
= IB_CM_REJ_PRIVATE_DATA_SIZE
;
845 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
850 ret
= cma_notify_user(id_priv
, event
, status
, ib_event
->private_data
,
853 /* Destroy the CM ID by returning a non-zero value. */
854 id_priv
->cm_id
.ib
= NULL
;
855 cma_exch(id_priv
, CMA_DESTROYING
);
856 cma_release_remove(id_priv
);
857 rdma_destroy_id(&id_priv
->id
);
861 cma_release_remove(id_priv
);
865 static struct rdma_id_private
*cma_new_id(struct rdma_cm_id
*listen_id
,
866 struct ib_cm_event
*ib_event
)
868 struct rdma_id_private
*id_priv
;
869 struct rdma_cm_id
*id
;
870 struct rdma_route
*rt
;
871 union cma_ip_addr
*src
, *dst
;
875 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
881 rt
->num_paths
= ib_event
->param
.req_rcvd
.alternate_path
? 2 : 1;
882 rt
->path_rec
= kmalloc(sizeof *rt
->path_rec
* rt
->num_paths
, GFP_KERNEL
);
886 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
887 &ip_ver
, &port
, &src
, &dst
))
890 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
891 ip_ver
, port
, src
, dst
);
892 rt
->path_rec
[0] = *ib_event
->param
.req_rcvd
.primary_path
;
893 if (rt
->num_paths
== 2)
894 rt
->path_rec
[1] = *ib_event
->param
.req_rcvd
.alternate_path
;
896 ib_addr_set_sgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].sgid
);
897 ib_addr_set_dgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].dgid
);
898 ib_addr_set_pkey(&rt
->addr
.dev_addr
, be16_to_cpu(rt
->path_rec
[0].pkey
));
899 rt
->addr
.dev_addr
.dev_type
= RDMA_NODE_IB_CA
;
901 id_priv
= container_of(id
, struct rdma_id_private
, id
);
902 id_priv
->state
= CMA_CONNECT
;
909 static int cma_req_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
911 struct rdma_id_private
*listen_id
, *conn_id
;
914 listen_id
= cm_id
->context
;
915 atomic_inc(&listen_id
->dev_remove
);
916 if (!cma_comp(listen_id
, CMA_LISTEN
)) {
921 conn_id
= cma_new_id(&listen_id
->id
, ib_event
);
927 atomic_inc(&conn_id
->dev_remove
);
928 ret
= cma_acquire_dev(conn_id
);
931 cma_release_remove(conn_id
);
932 rdma_destroy_id(&conn_id
->id
);
936 conn_id
->cm_id
.ib
= cm_id
;
937 cm_id
->context
= conn_id
;
938 cm_id
->cm_handler
= cma_ib_handler
;
940 offset
= cma_user_data_offset(listen_id
->id
.ps
);
941 ret
= cma_notify_user(conn_id
, RDMA_CM_EVENT_CONNECT_REQUEST
, 0,
942 ib_event
->private_data
+ offset
,
943 IB_CM_REQ_PRIVATE_DATA_SIZE
- offset
);
945 /* Destroy the CM ID by returning a non-zero value. */
946 conn_id
->cm_id
.ib
= NULL
;
947 cma_exch(conn_id
, CMA_DESTROYING
);
948 cma_release_remove(conn_id
);
949 rdma_destroy_id(&conn_id
->id
);
952 cma_release_remove(listen_id
);
956 static __be64
cma_get_service_id(enum rdma_port_space ps
, struct sockaddr
*addr
)
958 return cpu_to_be64(((u64
)ps
<< 16) +
959 be16_to_cpu(((struct sockaddr_in
*) addr
)->sin_port
));
962 static void cma_set_compare_data(enum rdma_port_space ps
, struct sockaddr
*addr
,
963 struct ib_cm_compare_data
*compare
)
965 struct cma_hdr
*cma_data
, *cma_mask
;
966 struct sdp_hh
*sdp_data
, *sdp_mask
;
968 struct in6_addr ip6_addr
;
970 memset(compare
, 0, sizeof *compare
);
971 cma_data
= (void *) compare
->data
;
972 cma_mask
= (void *) compare
->mask
;
973 sdp_data
= (void *) compare
->data
;
974 sdp_mask
= (void *) compare
->mask
;
976 switch (addr
->sa_family
) {
978 ip4_addr
= ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
;
979 if (ps
== RDMA_PS_SDP
) {
980 sdp_set_ip_ver(sdp_data
, 4);
981 sdp_set_ip_ver(sdp_mask
, 0xF);
982 sdp_data
->dst_addr
.ip4
.addr
= ip4_addr
;
983 sdp_mask
->dst_addr
.ip4
.addr
= ~0;
985 cma_set_ip_ver(cma_data
, 4);
986 cma_set_ip_ver(cma_mask
, 0xF);
987 cma_data
->dst_addr
.ip4
.addr
= ip4_addr
;
988 cma_mask
->dst_addr
.ip4
.addr
= ~0;
992 ip6_addr
= ((struct sockaddr_in6
*) addr
)->sin6_addr
;
993 if (ps
== RDMA_PS_SDP
) {
994 sdp_set_ip_ver(sdp_data
, 6);
995 sdp_set_ip_ver(sdp_mask
, 0xF);
996 sdp_data
->dst_addr
.ip6
= ip6_addr
;
997 memset(&sdp_mask
->dst_addr
.ip6
, 0xFF,
998 sizeof sdp_mask
->dst_addr
.ip6
);
1000 cma_set_ip_ver(cma_data
, 6);
1001 cma_set_ip_ver(cma_mask
, 0xF);
1002 cma_data
->dst_addr
.ip6
= ip6_addr
;
1003 memset(&cma_mask
->dst_addr
.ip6
, 0xFF,
1004 sizeof cma_mask
->dst_addr
.ip6
);
1012 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1014 struct rdma_id_private
*id_priv
= iw_id
->context
;
1015 enum rdma_cm_event_type event
= 0;
1016 struct sockaddr_in
*sin
;
1019 atomic_inc(&id_priv
->dev_remove
);
1021 switch (iw_event
->event
) {
1022 case IW_CM_EVENT_CLOSE
:
1023 event
= RDMA_CM_EVENT_DISCONNECTED
;
1025 case IW_CM_EVENT_CONNECT_REPLY
:
1026 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1027 *sin
= iw_event
->local_addr
;
1028 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1029 *sin
= iw_event
->remote_addr
;
1030 if (iw_event
->status
)
1031 event
= RDMA_CM_EVENT_REJECTED
;
1033 event
= RDMA_CM_EVENT_ESTABLISHED
;
1035 case IW_CM_EVENT_ESTABLISHED
:
1036 event
= RDMA_CM_EVENT_ESTABLISHED
;
1042 ret
= cma_notify_user(id_priv
, event
, iw_event
->status
,
1043 iw_event
->private_data
,
1044 iw_event
->private_data_len
);
1046 /* Destroy the CM ID by returning a non-zero value. */
1047 id_priv
->cm_id
.iw
= NULL
;
1048 cma_exch(id_priv
, CMA_DESTROYING
);
1049 cma_release_remove(id_priv
);
1050 rdma_destroy_id(&id_priv
->id
);
1054 cma_release_remove(id_priv
);
1058 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
1059 struct iw_cm_event
*iw_event
)
1061 struct rdma_cm_id
*new_cm_id
;
1062 struct rdma_id_private
*listen_id
, *conn_id
;
1063 struct sockaddr_in
*sin
;
1064 struct net_device
*dev
= NULL
;
1067 listen_id
= cm_id
->context
;
1068 atomic_inc(&listen_id
->dev_remove
);
1069 if (!cma_comp(listen_id
, CMA_LISTEN
)) {
1070 ret
= -ECONNABORTED
;
1074 /* Create a new RDMA id for the new IW CM ID */
1075 new_cm_id
= rdma_create_id(listen_id
->id
.event_handler
,
1076 listen_id
->id
.context
,
1082 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
1083 atomic_inc(&conn_id
->dev_remove
);
1084 conn_id
->state
= CMA_CONNECT
;
1086 dev
= ip_dev_find(iw_event
->local_addr
.sin_addr
.s_addr
);
1088 ret
= -EADDRNOTAVAIL
;
1089 cma_release_remove(conn_id
);
1090 rdma_destroy_id(new_cm_id
);
1093 ret
= rdma_copy_addr(&conn_id
->id
.route
.addr
.dev_addr
, dev
, NULL
);
1095 cma_release_remove(conn_id
);
1096 rdma_destroy_id(new_cm_id
);
1100 ret
= cma_acquire_dev(conn_id
);
1102 cma_release_remove(conn_id
);
1103 rdma_destroy_id(new_cm_id
);
1107 conn_id
->cm_id
.iw
= cm_id
;
1108 cm_id
->context
= conn_id
;
1109 cm_id
->cm_handler
= cma_iw_handler
;
1111 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.src_addr
;
1112 *sin
= iw_event
->local_addr
;
1113 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.dst_addr
;
1114 *sin
= iw_event
->remote_addr
;
1116 ret
= cma_notify_user(conn_id
, RDMA_CM_EVENT_CONNECT_REQUEST
, 0,
1117 iw_event
->private_data
,
1118 iw_event
->private_data_len
);
1120 /* User wants to destroy the CM ID */
1121 conn_id
->cm_id
.iw
= NULL
;
1122 cma_exch(conn_id
, CMA_DESTROYING
);
1123 cma_release_remove(conn_id
);
1124 rdma_destroy_id(&conn_id
->id
);
1130 cma_release_remove(listen_id
);
1134 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
1136 struct ib_cm_compare_data compare_data
;
1137 struct sockaddr
*addr
;
1141 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_req_handler
,
1143 if (IS_ERR(id_priv
->cm_id
.ib
))
1144 return PTR_ERR(id_priv
->cm_id
.ib
);
1146 addr
= &id_priv
->id
.route
.addr
.src_addr
;
1147 svc_id
= cma_get_service_id(id_priv
->id
.ps
, addr
);
1148 if (cma_any_addr(addr
))
1149 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, NULL
);
1151 cma_set_compare_data(id_priv
->id
.ps
, addr
, &compare_data
);
1152 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, &compare_data
);
1156 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1157 id_priv
->cm_id
.ib
= NULL
;
1163 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
1166 struct sockaddr_in
*sin
;
1168 id_priv
->cm_id
.iw
= iw_create_cm_id(id_priv
->id
.device
,
1169 iw_conn_req_handler
,
1171 if (IS_ERR(id_priv
->cm_id
.iw
))
1172 return PTR_ERR(id_priv
->cm_id
.iw
);
1174 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1175 id_priv
->cm_id
.iw
->local_addr
= *sin
;
1177 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
1180 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1181 id_priv
->cm_id
.iw
= NULL
;
1187 static int cma_listen_handler(struct rdma_cm_id
*id
,
1188 struct rdma_cm_event
*event
)
1190 struct rdma_id_private
*id_priv
= id
->context
;
1192 id
->context
= id_priv
->id
.context
;
1193 id
->event_handler
= id_priv
->id
.event_handler
;
1194 return id_priv
->id
.event_handler(id
, event
);
1197 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
1198 struct cma_device
*cma_dev
)
1200 struct rdma_id_private
*dev_id_priv
;
1201 struct rdma_cm_id
*id
;
1204 id
= rdma_create_id(cma_listen_handler
, id_priv
, id_priv
->id
.ps
);
1208 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
1210 dev_id_priv
->state
= CMA_ADDR_BOUND
;
1211 memcpy(&id
->route
.addr
.src_addr
, &id_priv
->id
.route
.addr
.src_addr
,
1212 ip_addr_size(&id_priv
->id
.route
.addr
.src_addr
));
1214 cma_attach_to_dev(dev_id_priv
, cma_dev
);
1215 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
1217 ret
= rdma_listen(id
, id_priv
->backlog
);
1223 cma_destroy_listen(dev_id_priv
);
1226 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
1228 struct cma_device
*cma_dev
;
1231 list_add_tail(&id_priv
->list
, &listen_any_list
);
1232 list_for_each_entry(cma_dev
, &dev_list
, list
)
1233 cma_listen_on_dev(id_priv
, cma_dev
);
1234 mutex_unlock(&lock
);
1237 static int cma_bind_any(struct rdma_cm_id
*id
, sa_family_t af
)
1239 struct sockaddr_in addr_in
;
1241 memset(&addr_in
, 0, sizeof addr_in
);
1242 addr_in
.sin_family
= af
;
1243 return rdma_bind_addr(id
, (struct sockaddr
*) &addr_in
);
1246 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
1248 struct rdma_id_private
*id_priv
;
1251 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1252 if (id_priv
->state
== CMA_IDLE
) {
1253 ret
= cma_bind_any(id
, AF_INET
);
1258 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_LISTEN
))
1261 id_priv
->backlog
= backlog
;
1263 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1264 case RDMA_TRANSPORT_IB
:
1265 ret
= cma_ib_listen(id_priv
);
1269 case RDMA_TRANSPORT_IWARP
:
1270 ret
= cma_iw_listen(id_priv
, backlog
);
1279 cma_listen_on_all(id_priv
);
1283 id_priv
->backlog
= 0;
1284 cma_comp_exch(id_priv
, CMA_LISTEN
, CMA_ADDR_BOUND
);
1287 EXPORT_SYMBOL(rdma_listen
);
1289 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
1292 struct cma_work
*work
= context
;
1293 struct rdma_route
*route
;
1295 route
= &work
->id
->id
.route
;
1298 route
->num_paths
= 1;
1299 *route
->path_rec
= *path_rec
;
1301 work
->old_state
= CMA_ROUTE_QUERY
;
1302 work
->new_state
= CMA_ADDR_RESOLVED
;
1303 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
1306 queue_work(cma_wq
, &work
->work
);
1309 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
1310 struct cma_work
*work
)
1312 struct rdma_dev_addr
*addr
= &id_priv
->id
.route
.addr
.dev_addr
;
1313 struct ib_sa_path_rec path_rec
;
1315 memset(&path_rec
, 0, sizeof path_rec
);
1316 ib_addr_get_sgid(addr
, &path_rec
.sgid
);
1317 ib_addr_get_dgid(addr
, &path_rec
.dgid
);
1318 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(addr
));
1319 path_rec
.numb_path
= 1;
1321 id_priv
->query_id
= ib_sa_path_rec_get(id_priv
->id
.device
,
1322 id_priv
->id
.port_num
, &path_rec
,
1323 IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
1324 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
,
1325 timeout_ms
, GFP_KERNEL
,
1326 cma_query_handler
, work
, &id_priv
->query
);
1328 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
1331 static void cma_work_handler(void *data
)
1333 struct cma_work
*work
= data
;
1334 struct rdma_id_private
*id_priv
= work
->id
;
1337 atomic_inc(&id_priv
->dev_remove
);
1338 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
1341 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
1342 cma_exch(id_priv
, CMA_DESTROYING
);
1346 cma_release_remove(id_priv
);
1347 cma_deref_id(id_priv
);
1349 rdma_destroy_id(&id_priv
->id
);
1353 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1355 struct rdma_route
*route
= &id_priv
->id
.route
;
1356 struct cma_work
*work
;
1359 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1364 INIT_WORK(&work
->work
, cma_work_handler
, work
);
1365 work
->old_state
= CMA_ROUTE_QUERY
;
1366 work
->new_state
= CMA_ROUTE_RESOLVED
;
1367 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1369 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
1370 if (!route
->path_rec
) {
1375 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
1381 kfree(route
->path_rec
);
1382 route
->path_rec
= NULL
;
1388 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
1389 struct ib_sa_path_rec
*path_rec
, int num_paths
)
1391 struct rdma_id_private
*id_priv
;
1394 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1395 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_RESOLVED
))
1398 id
->route
.path_rec
= kmalloc(sizeof *path_rec
* num_paths
, GFP_KERNEL
);
1399 if (!id
->route
.path_rec
) {
1404 memcpy(id
->route
.path_rec
, path_rec
, sizeof *path_rec
* num_paths
);
1407 cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_ADDR_RESOLVED
);
1410 EXPORT_SYMBOL(rdma_set_ib_paths
);
1412 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1414 struct cma_work
*work
;
1416 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1421 INIT_WORK(&work
->work
, cma_work_handler
, work
);
1422 work
->old_state
= CMA_ROUTE_QUERY
;
1423 work
->new_state
= CMA_ROUTE_RESOLVED
;
1424 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1425 queue_work(cma_wq
, &work
->work
);
1429 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
1431 struct rdma_id_private
*id_priv
;
1434 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1435 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_QUERY
))
1438 atomic_inc(&id_priv
->refcount
);
1439 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1440 case RDMA_TRANSPORT_IB
:
1441 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
1443 case RDMA_TRANSPORT_IWARP
:
1444 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
1455 cma_comp_exch(id_priv
, CMA_ROUTE_QUERY
, CMA_ADDR_RESOLVED
);
1456 cma_deref_id(id_priv
);
1459 EXPORT_SYMBOL(rdma_resolve_route
);
1461 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
1463 struct cma_device
*cma_dev
;
1464 struct ib_port_attr port_attr
;
1471 list_for_each_entry(cma_dev
, &dev_list
, list
)
1472 for (p
= 1; p
<= cma_dev
->device
->phys_port_cnt
; ++p
)
1473 if (!ib_query_port (cma_dev
->device
, p
, &port_attr
) &&
1474 port_attr
.state
== IB_PORT_ACTIVE
)
1477 if (!list_empty(&dev_list
)) {
1479 cma_dev
= list_entry(dev_list
.next
, struct cma_device
, list
);
1486 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
);
1490 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
1494 ib_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1495 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
1496 id_priv
->id
.port_num
= p
;
1497 cma_attach_to_dev(id_priv
, cma_dev
);
1499 mutex_unlock(&lock
);
1503 static void addr_handler(int status
, struct sockaddr
*src_addr
,
1504 struct rdma_dev_addr
*dev_addr
, void *context
)
1506 struct rdma_id_private
*id_priv
= context
;
1507 enum rdma_cm_event_type event
;
1509 atomic_inc(&id_priv
->dev_remove
);
1510 if (!id_priv
->cma_dev
&& !status
)
1511 status
= cma_acquire_dev(id_priv
);
1514 if (!cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_BOUND
))
1516 event
= RDMA_CM_EVENT_ADDR_ERROR
;
1518 if (!cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_RESOLVED
))
1520 memcpy(&id_priv
->id
.route
.addr
.src_addr
, src_addr
,
1521 ip_addr_size(src_addr
));
1522 event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1525 if (cma_notify_user(id_priv
, event
, status
, NULL
, 0)) {
1526 cma_exch(id_priv
, CMA_DESTROYING
);
1527 cma_release_remove(id_priv
);
1528 cma_deref_id(id_priv
);
1529 rdma_destroy_id(&id_priv
->id
);
1533 cma_release_remove(id_priv
);
1534 cma_deref_id(id_priv
);
1537 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
1539 struct cma_work
*work
;
1540 struct sockaddr_in
*src_in
, *dst_in
;
1544 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1548 if (!id_priv
->cma_dev
) {
1549 ret
= cma_bind_loopback(id_priv
);
1554 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1555 ib_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1557 if (cma_zero_addr(&id_priv
->id
.route
.addr
.src_addr
)) {
1558 src_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.src_addr
;
1559 dst_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.dst_addr
;
1560 src_in
->sin_family
= dst_in
->sin_family
;
1561 src_in
->sin_addr
.s_addr
= dst_in
->sin_addr
.s_addr
;
1565 INIT_WORK(&work
->work
, cma_work_handler
, work
);
1566 work
->old_state
= CMA_ADDR_QUERY
;
1567 work
->new_state
= CMA_ADDR_RESOLVED
;
1568 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1569 queue_work(cma_wq
, &work
->work
);
1576 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1577 struct sockaddr
*dst_addr
)
1579 if (src_addr
&& src_addr
->sa_family
)
1580 return rdma_bind_addr(id
, src_addr
);
1582 return cma_bind_any(id
, dst_addr
->sa_family
);
1585 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1586 struct sockaddr
*dst_addr
, int timeout_ms
)
1588 struct rdma_id_private
*id_priv
;
1591 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1592 if (id_priv
->state
== CMA_IDLE
) {
1593 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
1598 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_ADDR_QUERY
))
1601 atomic_inc(&id_priv
->refcount
);
1602 memcpy(&id
->route
.addr
.dst_addr
, dst_addr
, ip_addr_size(dst_addr
));
1603 if (cma_any_addr(dst_addr
))
1604 ret
= cma_resolve_loopback(id_priv
);
1606 ret
= rdma_resolve_ip(&id
->route
.addr
.src_addr
, dst_addr
,
1607 &id
->route
.addr
.dev_addr
,
1608 timeout_ms
, addr_handler
, id_priv
);
1614 cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_BOUND
);
1615 cma_deref_id(id_priv
);
1618 EXPORT_SYMBOL(rdma_resolve_addr
);
1620 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
1621 struct rdma_id_private
*id_priv
)
1623 struct sockaddr_in
*sin
;
1625 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1626 sin
->sin_port
= htons(bind_list
->port
);
1627 id_priv
->bind_list
= bind_list
;
1628 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
1631 static int cma_alloc_port(struct idr
*ps
, struct rdma_id_private
*id_priv
,
1632 unsigned short snum
)
1634 struct rdma_bind_list
*bind_list
;
1635 int port
, start
, ret
;
1637 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1641 start
= snum
? snum
: sysctl_local_port_range
[0];
1644 ret
= idr_get_new_above(ps
, bind_list
, start
, &port
);
1645 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1650 if ((snum
&& port
!= snum
) ||
1651 (!snum
&& port
> sysctl_local_port_range
[1])) {
1652 idr_remove(ps
, port
);
1653 ret
= -EADDRNOTAVAIL
;
1658 bind_list
->port
= (unsigned short) port
;
1659 cma_bind_port(bind_list
, id_priv
);
1666 static int cma_use_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1668 struct rdma_id_private
*cur_id
;
1669 struct sockaddr_in
*sin
, *cur_sin
;
1670 struct rdma_bind_list
*bind_list
;
1671 struct hlist_node
*node
;
1672 unsigned short snum
;
1674 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1675 snum
= ntohs(sin
->sin_port
);
1676 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
1679 bind_list
= idr_find(ps
, snum
);
1681 return cma_alloc_port(ps
, id_priv
, snum
);
1684 * We don't support binding to any address if anyone is bound to
1685 * a specific address on the same port.
1687 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
))
1688 return -EADDRNOTAVAIL
;
1690 hlist_for_each_entry(cur_id
, node
, &bind_list
->owners
, node
) {
1691 if (cma_any_addr(&cur_id
->id
.route
.addr
.src_addr
))
1692 return -EADDRNOTAVAIL
;
1694 cur_sin
= (struct sockaddr_in
*) &cur_id
->id
.route
.addr
.src_addr
;
1695 if (sin
->sin_addr
.s_addr
== cur_sin
->sin_addr
.s_addr
)
1699 cma_bind_port(bind_list
, id_priv
);
1703 static int cma_get_port(struct rdma_id_private
*id_priv
)
1708 switch (id_priv
->id
.ps
) {
1716 return -EPROTONOSUPPORT
;
1720 if (cma_any_port(&id_priv
->id
.route
.addr
.src_addr
))
1721 ret
= cma_alloc_port(ps
, id_priv
, 0);
1723 ret
= cma_use_port(ps
, id_priv
);
1724 mutex_unlock(&lock
);
1729 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
1731 struct rdma_id_private
*id_priv
;
1734 if (addr
->sa_family
!= AF_INET
)
1735 return -EAFNOSUPPORT
;
1737 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1738 if (!cma_comp_exch(id_priv
, CMA_IDLE
, CMA_ADDR_BOUND
))
1741 if (!cma_any_addr(addr
)) {
1742 ret
= rdma_translate_ip(addr
, &id
->route
.addr
.dev_addr
);
1744 ret
= cma_acquire_dev(id_priv
);
1749 memcpy(&id
->route
.addr
.src_addr
, addr
, ip_addr_size(addr
));
1750 ret
= cma_get_port(id_priv
);
1756 cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_IDLE
);
1759 EXPORT_SYMBOL(rdma_bind_addr
);
1761 static int cma_format_hdr(void *hdr
, enum rdma_port_space ps
,
1762 struct rdma_route
*route
)
1764 struct sockaddr_in
*src4
, *dst4
;
1765 struct cma_hdr
*cma_hdr
;
1766 struct sdp_hh
*sdp_hdr
;
1768 src4
= (struct sockaddr_in
*) &route
->addr
.src_addr
;
1769 dst4
= (struct sockaddr_in
*) &route
->addr
.dst_addr
;
1774 if (sdp_get_majv(sdp_hdr
->sdp_version
) != SDP_MAJ_VERSION
)
1776 sdp_set_ip_ver(sdp_hdr
, 4);
1777 sdp_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
1778 sdp_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
1779 sdp_hdr
->port
= src4
->sin_port
;
1783 cma_hdr
->cma_version
= CMA_VERSION
;
1784 cma_set_ip_ver(cma_hdr
, 4);
1785 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
1786 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
1787 cma_hdr
->port
= src4
->sin_port
;
1793 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
1794 struct rdma_conn_param
*conn_param
)
1796 struct ib_cm_req_param req
;
1797 struct rdma_route
*route
;
1801 memset(&req
, 0, sizeof req
);
1802 offset
= cma_user_data_offset(id_priv
->id
.ps
);
1803 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
1804 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
1808 if (conn_param
->private_data
&& conn_param
->private_data_len
)
1809 memcpy(private_data
+ offset
, conn_param
->private_data
,
1810 conn_param
->private_data_len
);
1812 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
,
1814 if (IS_ERR(id_priv
->cm_id
.ib
)) {
1815 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
1819 route
= &id_priv
->id
.route
;
1820 ret
= cma_format_hdr(private_data
, id_priv
->id
.ps
, route
);
1823 req
.private_data
= private_data
;
1825 req
.primary_path
= &route
->path_rec
[0];
1826 if (route
->num_paths
== 2)
1827 req
.alternate_path
= &route
->path_rec
[1];
1829 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
1830 &route
->addr
.dst_addr
);
1831 req
.qp_num
= id_priv
->qp_num
;
1832 req
.qp_type
= id_priv
->qp_type
;
1833 req
.starting_psn
= id_priv
->seq_num
;
1834 req
.responder_resources
= conn_param
->responder_resources
;
1835 req
.initiator_depth
= conn_param
->initiator_depth
;
1836 req
.flow_control
= conn_param
->flow_control
;
1837 req
.retry_count
= conn_param
->retry_count
;
1838 req
.rnr_retry_count
= conn_param
->rnr_retry_count
;
1839 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
1840 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
1841 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
1842 req
.srq
= id_priv
->srq
? 1 : 0;
1844 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
1846 kfree(private_data
);
1850 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
1851 struct rdma_conn_param
*conn_param
)
1853 struct iw_cm_id
*cm_id
;
1854 struct sockaddr_in
* sin
;
1856 struct iw_cm_conn_param iw_param
;
1858 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
1859 if (IS_ERR(cm_id
)) {
1860 ret
= PTR_ERR(cm_id
);
1864 id_priv
->cm_id
.iw
= cm_id
;
1866 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1867 cm_id
->local_addr
= *sin
;
1869 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1870 cm_id
->remote_addr
= *sin
;
1872 ret
= cma_modify_qp_rtr(&id_priv
->id
);
1874 iw_destroy_cm_id(cm_id
);
1878 iw_param
.ord
= conn_param
->initiator_depth
;
1879 iw_param
.ird
= conn_param
->responder_resources
;
1880 iw_param
.private_data
= conn_param
->private_data
;
1881 iw_param
.private_data_len
= conn_param
->private_data_len
;
1883 iw_param
.qpn
= id_priv
->qp_num
;
1885 iw_param
.qpn
= conn_param
->qp_num
;
1886 ret
= iw_cm_connect(cm_id
, &iw_param
);
1891 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
1893 struct rdma_id_private
*id_priv
;
1896 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1897 if (!cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_CONNECT
))
1901 id_priv
->qp_num
= conn_param
->qp_num
;
1902 id_priv
->qp_type
= conn_param
->qp_type
;
1903 id_priv
->srq
= conn_param
->srq
;
1906 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1907 case RDMA_TRANSPORT_IB
:
1908 ret
= cma_connect_ib(id_priv
, conn_param
);
1910 case RDMA_TRANSPORT_IWARP
:
1911 ret
= cma_connect_iw(id_priv
, conn_param
);
1922 cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_ROUTE_RESOLVED
);
1925 EXPORT_SYMBOL(rdma_connect
);
1927 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
1928 struct rdma_conn_param
*conn_param
)
1930 struct ib_cm_rep_param rep
;
1933 ret
= cma_modify_qp_rtr(&id_priv
->id
);
1937 memset(&rep
, 0, sizeof rep
);
1938 rep
.qp_num
= id_priv
->qp_num
;
1939 rep
.starting_psn
= id_priv
->seq_num
;
1940 rep
.private_data
= conn_param
->private_data
;
1941 rep
.private_data_len
= conn_param
->private_data_len
;
1942 rep
.responder_resources
= conn_param
->responder_resources
;
1943 rep
.initiator_depth
= conn_param
->initiator_depth
;
1944 rep
.target_ack_delay
= CMA_CM_RESPONSE_TIMEOUT
;
1945 rep
.failover_accepted
= 0;
1946 rep
.flow_control
= conn_param
->flow_control
;
1947 rep
.rnr_retry_count
= conn_param
->rnr_retry_count
;
1948 rep
.srq
= id_priv
->srq
? 1 : 0;
1950 return ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
1953 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
1954 struct rdma_conn_param
*conn_param
)
1956 struct iw_cm_conn_param iw_param
;
1959 ret
= cma_modify_qp_rtr(&id_priv
->id
);
1963 iw_param
.ord
= conn_param
->initiator_depth
;
1964 iw_param
.ird
= conn_param
->responder_resources
;
1965 iw_param
.private_data
= conn_param
->private_data
;
1966 iw_param
.private_data_len
= conn_param
->private_data_len
;
1967 if (id_priv
->id
.qp
) {
1968 iw_param
.qpn
= id_priv
->qp_num
;
1970 iw_param
.qpn
= conn_param
->qp_num
;
1972 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
1975 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
1977 struct rdma_id_private
*id_priv
;
1980 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1981 if (!cma_comp(id_priv
, CMA_CONNECT
))
1984 if (!id
->qp
&& conn_param
) {
1985 id_priv
->qp_num
= conn_param
->qp_num
;
1986 id_priv
->qp_type
= conn_param
->qp_type
;
1987 id_priv
->srq
= conn_param
->srq
;
1990 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1991 case RDMA_TRANSPORT_IB
:
1993 ret
= cma_accept_ib(id_priv
, conn_param
);
1995 ret
= cma_rep_recv(id_priv
);
1997 case RDMA_TRANSPORT_IWARP
:
1998 ret
= cma_accept_iw(id_priv
, conn_param
);
2010 cma_modify_qp_err(id
);
2011 rdma_reject(id
, NULL
, 0);
2014 EXPORT_SYMBOL(rdma_accept
);
2016 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
2017 u8 private_data_len
)
2019 struct rdma_id_private
*id_priv
;
2022 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2023 if (!cma_comp(id_priv
, CMA_CONNECT
))
2026 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2027 case RDMA_TRANSPORT_IB
:
2028 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
2029 IB_CM_REJ_CONSUMER_DEFINED
, NULL
, 0,
2030 private_data
, private_data_len
);
2032 case RDMA_TRANSPORT_IWARP
:
2033 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
2034 private_data
, private_data_len
);
2042 EXPORT_SYMBOL(rdma_reject
);
2044 int rdma_disconnect(struct rdma_cm_id
*id
)
2046 struct rdma_id_private
*id_priv
;
2049 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2050 if (!cma_comp(id_priv
, CMA_CONNECT
) &&
2051 !cma_comp(id_priv
, CMA_DISCONNECT
))
2054 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2055 case RDMA_TRANSPORT_IB
:
2056 ret
= cma_modify_qp_err(id
);
2059 /* Initiate or respond to a disconnect. */
2060 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
2061 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
2063 case RDMA_TRANSPORT_IWARP
:
2064 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
2073 EXPORT_SYMBOL(rdma_disconnect
);
2075 static void cma_add_one(struct ib_device
*device
)
2077 struct cma_device
*cma_dev
;
2078 struct rdma_id_private
*id_priv
;
2080 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
2084 cma_dev
->device
= device
;
2085 cma_dev
->node_guid
= device
->node_guid
;
2086 if (!cma_dev
->node_guid
)
2089 init_completion(&cma_dev
->comp
);
2090 atomic_set(&cma_dev
->refcount
, 1);
2091 INIT_LIST_HEAD(&cma_dev
->id_list
);
2092 ib_set_client_data(device
, &cma_client
, cma_dev
);
2095 list_add_tail(&cma_dev
->list
, &dev_list
);
2096 list_for_each_entry(id_priv
, &listen_any_list
, list
)
2097 cma_listen_on_dev(id_priv
, cma_dev
);
2098 mutex_unlock(&lock
);
2104 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
2106 enum cma_state state
;
2108 /* Record that we want to remove the device */
2109 state
= cma_exch(id_priv
, CMA_DEVICE_REMOVAL
);
2110 if (state
== CMA_DESTROYING
)
2113 cma_cancel_operation(id_priv
, state
);
2114 wait_event(id_priv
->wait_remove
, !atomic_read(&id_priv
->dev_remove
));
2116 /* Check for destruction from another callback. */
2117 if (!cma_comp(id_priv
, CMA_DEVICE_REMOVAL
))
2120 return cma_notify_user(id_priv
, RDMA_CM_EVENT_DEVICE_REMOVAL
,
2124 static void cma_process_remove(struct cma_device
*cma_dev
)
2126 struct list_head remove_list
;
2127 struct rdma_id_private
*id_priv
;
2130 INIT_LIST_HEAD(&remove_list
);
2133 while (!list_empty(&cma_dev
->id_list
)) {
2134 id_priv
= list_entry(cma_dev
->id_list
.next
,
2135 struct rdma_id_private
, list
);
2137 if (cma_internal_listen(id_priv
)) {
2138 cma_destroy_listen(id_priv
);
2142 list_del(&id_priv
->list
);
2143 list_add_tail(&id_priv
->list
, &remove_list
);
2144 atomic_inc(&id_priv
->refcount
);
2145 mutex_unlock(&lock
);
2147 ret
= cma_remove_id_dev(id_priv
);
2148 cma_deref_id(id_priv
);
2150 rdma_destroy_id(&id_priv
->id
);
2154 mutex_unlock(&lock
);
2156 cma_deref_dev(cma_dev
);
2157 wait_for_completion(&cma_dev
->comp
);
2160 static void cma_remove_one(struct ib_device
*device
)
2162 struct cma_device
*cma_dev
;
2164 cma_dev
= ib_get_client_data(device
, &cma_client
);
2169 list_del(&cma_dev
->list
);
2170 mutex_unlock(&lock
);
2172 cma_process_remove(cma_dev
);
2176 static int cma_init(void)
2180 cma_wq
= create_singlethread_workqueue("rdma_cm_wq");
2184 ret
= ib_register_client(&cma_client
);
2190 destroy_workqueue(cma_wq
);
2194 static void cma_cleanup(void)
2196 ib_unregister_client(&cma_client
);
2197 destroy_workqueue(cma_wq
);
2198 idr_destroy(&sdp_ps
);
2199 idr_destroy(&tcp_ps
);
2202 module_init(cma_init
);
2203 module_exit(cma_cleanup
);