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
);
74 static DEFINE_IDR(ipoib_ps
);
78 struct list_head list
;
79 struct ib_device
*device
;
80 struct completion comp
;
82 struct list_head id_list
;
99 struct rdma_bind_list
{
101 struct hlist_head owners
;
106 * Device removal can occur at anytime, so we need extra handling to
107 * serialize notifying the user of device removal with other callbacks.
108 * We do this by disabling removal notification while a callback is in process,
109 * and reporting it after the callback completes.
111 struct rdma_id_private
{
112 struct rdma_cm_id id
;
114 struct rdma_bind_list
*bind_list
;
115 struct hlist_node node
;
116 struct list_head list
;
117 struct list_head listen_list
;
118 struct cma_device
*cma_dev
;
119 struct list_head mc_list
;
121 enum cma_state state
;
123 struct completion comp
;
125 wait_queue_head_t wait_remove
;
130 struct ib_sa_query
*query
;
144 struct cma_multicast
{
145 struct rdma_id_private
*id_priv
;
147 struct ib_sa_multicast
*ib
;
149 struct list_head list
;
151 struct sockaddr addr
;
152 u8 pad
[sizeof(struct sockaddr_in6
) -
153 sizeof(struct sockaddr
)];
157 struct work_struct work
;
158 struct rdma_id_private
*id
;
159 enum cma_state old_state
;
160 enum cma_state new_state
;
161 struct rdma_cm_event event
;
174 u8 ip_version
; /* IP version: 7:4 */
176 union cma_ip_addr src_addr
;
177 union cma_ip_addr dst_addr
;
182 u8 sdp_version
; /* Major version: 7:4 */
183 u8 ip_version
; /* IP version: 7:4 */
184 u8 sdp_specific1
[10];
187 union cma_ip_addr src_addr
;
188 union cma_ip_addr dst_addr
;
196 #define CMA_VERSION 0x00
197 #define SDP_MAJ_VERSION 0x2
199 static int cma_comp(struct rdma_id_private
*id_priv
, enum cma_state comp
)
204 spin_lock_irqsave(&id_priv
->lock
, flags
);
205 ret
= (id_priv
->state
== comp
);
206 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
210 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
211 enum cma_state comp
, enum cma_state exch
)
216 spin_lock_irqsave(&id_priv
->lock
, flags
);
217 if ((ret
= (id_priv
->state
== comp
)))
218 id_priv
->state
= exch
;
219 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
223 static enum cma_state
cma_exch(struct rdma_id_private
*id_priv
,
229 spin_lock_irqsave(&id_priv
->lock
, flags
);
230 old
= id_priv
->state
;
231 id_priv
->state
= exch
;
232 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
236 static inline u8
cma_get_ip_ver(struct cma_hdr
*hdr
)
238 return hdr
->ip_version
>> 4;
241 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
243 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
246 static inline u8
sdp_get_majv(u8 sdp_version
)
248 return sdp_version
>> 4;
251 static inline u8
sdp_get_ip_ver(struct sdp_hh
*hh
)
253 return hh
->ip_version
>> 4;
256 static inline void sdp_set_ip_ver(struct sdp_hh
*hh
, u8 ip_ver
)
258 hh
->ip_version
= (ip_ver
<< 4) | (hh
->ip_version
& 0xF);
261 static inline int cma_is_ud_ps(enum rdma_port_space ps
)
263 return (ps
== RDMA_PS_UDP
|| ps
== RDMA_PS_IPOIB
);
266 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
267 struct cma_device
*cma_dev
)
269 atomic_inc(&cma_dev
->refcount
);
270 id_priv
->cma_dev
= cma_dev
;
271 id_priv
->id
.device
= cma_dev
->device
;
272 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
275 static inline void cma_deref_dev(struct cma_device
*cma_dev
)
277 if (atomic_dec_and_test(&cma_dev
->refcount
))
278 complete(&cma_dev
->comp
);
281 static void cma_detach_from_dev(struct rdma_id_private
*id_priv
)
283 list_del(&id_priv
->list
);
284 cma_deref_dev(id_priv
->cma_dev
);
285 id_priv
->cma_dev
= NULL
;
288 static int cma_set_qkey(struct ib_device
*device
, u8 port_num
,
289 enum rdma_port_space ps
,
290 struct rdma_dev_addr
*dev_addr
, u32
*qkey
)
292 struct ib_sa_mcmember_rec rec
;
297 *qkey
= RDMA_UDP_QKEY
;
300 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
301 ret
= ib_sa_get_mcmember_rec(device
, port_num
, &rec
.mgid
, &rec
);
302 *qkey
= be32_to_cpu(rec
.qkey
);
310 static int cma_acquire_dev(struct rdma_id_private
*id_priv
)
312 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
313 struct cma_device
*cma_dev
;
317 switch (rdma_node_get_transport(dev_addr
->dev_type
)) {
318 case RDMA_TRANSPORT_IB
:
319 ib_addr_get_sgid(dev_addr
, &gid
);
321 case RDMA_TRANSPORT_IWARP
:
322 iw_addr_get_sgid(dev_addr
, &gid
);
328 list_for_each_entry(cma_dev
, &dev_list
, list
) {
329 ret
= ib_find_cached_gid(cma_dev
->device
, &gid
,
330 &id_priv
->id
.port_num
, NULL
);
332 ret
= cma_set_qkey(cma_dev
->device
,
333 id_priv
->id
.port_num
,
334 id_priv
->id
.ps
, dev_addr
,
337 cma_attach_to_dev(id_priv
, cma_dev
);
344 static void cma_deref_id(struct rdma_id_private
*id_priv
)
346 if (atomic_dec_and_test(&id_priv
->refcount
))
347 complete(&id_priv
->comp
);
350 static int cma_disable_remove(struct rdma_id_private
*id_priv
,
351 enum cma_state state
)
356 spin_lock_irqsave(&id_priv
->lock
, flags
);
357 if (id_priv
->state
== state
) {
358 atomic_inc(&id_priv
->dev_remove
);
362 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
366 static void cma_enable_remove(struct rdma_id_private
*id_priv
)
368 if (atomic_dec_and_test(&id_priv
->dev_remove
))
369 wake_up(&id_priv
->wait_remove
);
372 static int cma_has_cm_dev(struct rdma_id_private
*id_priv
)
374 return (id_priv
->id
.device
&& id_priv
->cm_id
.ib
);
377 struct rdma_cm_id
*rdma_create_id(rdma_cm_event_handler event_handler
,
378 void *context
, enum rdma_port_space ps
)
380 struct rdma_id_private
*id_priv
;
382 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
384 return ERR_PTR(-ENOMEM
);
386 id_priv
->state
= CMA_IDLE
;
387 id_priv
->id
.context
= context
;
388 id_priv
->id
.event_handler
= event_handler
;
390 spin_lock_init(&id_priv
->lock
);
391 init_completion(&id_priv
->comp
);
392 atomic_set(&id_priv
->refcount
, 1);
393 init_waitqueue_head(&id_priv
->wait_remove
);
394 atomic_set(&id_priv
->dev_remove
, 0);
395 INIT_LIST_HEAD(&id_priv
->listen_list
);
396 INIT_LIST_HEAD(&id_priv
->mc_list
);
397 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
401 EXPORT_SYMBOL(rdma_create_id
);
403 static int cma_init_ud_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
405 struct ib_qp_attr qp_attr
;
406 int qp_attr_mask
, ret
;
408 qp_attr
.qp_state
= IB_QPS_INIT
;
409 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
413 ret
= ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
417 qp_attr
.qp_state
= IB_QPS_RTR
;
418 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
);
422 qp_attr
.qp_state
= IB_QPS_RTS
;
424 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
429 static int cma_init_conn_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
431 struct ib_qp_attr qp_attr
;
432 int qp_attr_mask
, ret
;
434 qp_attr
.qp_state
= IB_QPS_INIT
;
435 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
439 return ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
442 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
443 struct ib_qp_init_attr
*qp_init_attr
)
445 struct rdma_id_private
*id_priv
;
449 id_priv
= container_of(id
, struct rdma_id_private
, id
);
450 if (id
->device
!= pd
->device
)
453 qp
= ib_create_qp(pd
, qp_init_attr
);
457 if (cma_is_ud_ps(id_priv
->id
.ps
))
458 ret
= cma_init_ud_qp(id_priv
, qp
);
460 ret
= cma_init_conn_qp(id_priv
, qp
);
465 id_priv
->qp_num
= qp
->qp_num
;
466 id_priv
->srq
= (qp
->srq
!= NULL
);
472 EXPORT_SYMBOL(rdma_create_qp
);
474 void rdma_destroy_qp(struct rdma_cm_id
*id
)
476 ib_destroy_qp(id
->qp
);
478 EXPORT_SYMBOL(rdma_destroy_qp
);
480 static int cma_modify_qp_rtr(struct rdma_cm_id
*id
)
482 struct ib_qp_attr qp_attr
;
483 int qp_attr_mask
, ret
;
488 /* Need to update QP attributes from default values. */
489 qp_attr
.qp_state
= IB_QPS_INIT
;
490 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
494 ret
= ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
498 qp_attr
.qp_state
= IB_QPS_RTR
;
499 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
503 return ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
506 static int cma_modify_qp_rts(struct rdma_cm_id
*id
)
508 struct ib_qp_attr qp_attr
;
509 int qp_attr_mask
, ret
;
514 qp_attr
.qp_state
= IB_QPS_RTS
;
515 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
519 return ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
522 static int cma_modify_qp_err(struct rdma_cm_id
*id
)
524 struct ib_qp_attr qp_attr
;
529 qp_attr
.qp_state
= IB_QPS_ERR
;
530 return ib_modify_qp(id
->qp
, &qp_attr
, IB_QP_STATE
);
533 static int cma_ib_init_qp_attr(struct rdma_id_private
*id_priv
,
534 struct ib_qp_attr
*qp_attr
, int *qp_attr_mask
)
536 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
539 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
540 ib_addr_get_pkey(dev_addr
),
541 &qp_attr
->pkey_index
);
545 qp_attr
->port_num
= id_priv
->id
.port_num
;
546 *qp_attr_mask
= IB_QP_STATE
| IB_QP_PKEY_INDEX
| IB_QP_PORT
;
548 if (cma_is_ud_ps(id_priv
->id
.ps
)) {
549 qp_attr
->qkey
= id_priv
->qkey
;
550 *qp_attr_mask
|= IB_QP_QKEY
;
552 qp_attr
->qp_access_flags
= 0;
553 *qp_attr_mask
|= IB_QP_ACCESS_FLAGS
;
558 int rdma_init_qp_attr(struct rdma_cm_id
*id
, struct ib_qp_attr
*qp_attr
,
561 struct rdma_id_private
*id_priv
;
564 id_priv
= container_of(id
, struct rdma_id_private
, id
);
565 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
566 case RDMA_TRANSPORT_IB
:
567 if (!id_priv
->cm_id
.ib
|| cma_is_ud_ps(id_priv
->id
.ps
))
568 ret
= cma_ib_init_qp_attr(id_priv
, qp_attr
, qp_attr_mask
);
570 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, qp_attr
,
572 if (qp_attr
->qp_state
== IB_QPS_RTR
)
573 qp_attr
->rq_psn
= id_priv
->seq_num
;
575 case RDMA_TRANSPORT_IWARP
:
576 if (!id_priv
->cm_id
.iw
) {
577 qp_attr
->qp_access_flags
= 0;
578 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
;
580 ret
= iw_cm_init_qp_attr(id_priv
->cm_id
.iw
, qp_attr
,
590 EXPORT_SYMBOL(rdma_init_qp_attr
);
592 static inline int cma_zero_addr(struct sockaddr
*addr
)
594 struct in6_addr
*ip6
;
596 if (addr
->sa_family
== AF_INET
)
597 return ZERONET(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
599 ip6
= &((struct sockaddr_in6
*) addr
)->sin6_addr
;
600 return (ip6
->s6_addr32
[0] | ip6
->s6_addr32
[1] |
601 ip6
->s6_addr32
[2] | ip6
->s6_addr32
[3]) == 0;
605 static inline int cma_loopback_addr(struct sockaddr
*addr
)
607 return LOOPBACK(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
610 static inline int cma_any_addr(struct sockaddr
*addr
)
612 return cma_zero_addr(addr
) || cma_loopback_addr(addr
);
615 static inline __be16
cma_port(struct sockaddr
*addr
)
617 if (addr
->sa_family
== AF_INET
)
618 return ((struct sockaddr_in
*) addr
)->sin_port
;
620 return ((struct sockaddr_in6
*) addr
)->sin6_port
;
623 static inline int cma_any_port(struct sockaddr
*addr
)
625 return !cma_port(addr
);
628 static int cma_get_net_info(void *hdr
, enum rdma_port_space ps
,
629 u8
*ip_ver
, __u16
*port
,
630 union cma_ip_addr
**src
, union cma_ip_addr
**dst
)
634 if (sdp_get_majv(((struct sdp_hh
*) hdr
)->sdp_version
) !=
638 *ip_ver
= sdp_get_ip_ver(hdr
);
639 *port
= ((struct sdp_hh
*) hdr
)->port
;
640 *src
= &((struct sdp_hh
*) hdr
)->src_addr
;
641 *dst
= &((struct sdp_hh
*) hdr
)->dst_addr
;
644 if (((struct cma_hdr
*) hdr
)->cma_version
!= CMA_VERSION
)
647 *ip_ver
= cma_get_ip_ver(hdr
);
648 *port
= ((struct cma_hdr
*) hdr
)->port
;
649 *src
= &((struct cma_hdr
*) hdr
)->src_addr
;
650 *dst
= &((struct cma_hdr
*) hdr
)->dst_addr
;
654 if (*ip_ver
!= 4 && *ip_ver
!= 6)
659 static void cma_save_net_info(struct rdma_addr
*addr
,
660 struct rdma_addr
*listen_addr
,
661 u8 ip_ver
, __u16 port
,
662 union cma_ip_addr
*src
, union cma_ip_addr
*dst
)
664 struct sockaddr_in
*listen4
, *ip4
;
665 struct sockaddr_in6
*listen6
, *ip6
;
669 listen4
= (struct sockaddr_in
*) &listen_addr
->src_addr
;
670 ip4
= (struct sockaddr_in
*) &addr
->src_addr
;
671 ip4
->sin_family
= listen4
->sin_family
;
672 ip4
->sin_addr
.s_addr
= dst
->ip4
.addr
;
673 ip4
->sin_port
= listen4
->sin_port
;
675 ip4
= (struct sockaddr_in
*) &addr
->dst_addr
;
676 ip4
->sin_family
= listen4
->sin_family
;
677 ip4
->sin_addr
.s_addr
= src
->ip4
.addr
;
678 ip4
->sin_port
= port
;
681 listen6
= (struct sockaddr_in6
*) &listen_addr
->src_addr
;
682 ip6
= (struct sockaddr_in6
*) &addr
->src_addr
;
683 ip6
->sin6_family
= listen6
->sin6_family
;
684 ip6
->sin6_addr
= dst
->ip6
;
685 ip6
->sin6_port
= listen6
->sin6_port
;
687 ip6
= (struct sockaddr_in6
*) &addr
->dst_addr
;
688 ip6
->sin6_family
= listen6
->sin6_family
;
689 ip6
->sin6_addr
= src
->ip6
;
690 ip6
->sin6_port
= port
;
697 static inline int cma_user_data_offset(enum rdma_port_space ps
)
703 return sizeof(struct cma_hdr
);
707 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
709 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
710 case RDMA_TRANSPORT_IB
:
712 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
719 static inline int cma_internal_listen(struct rdma_id_private
*id_priv
)
721 return (id_priv
->state
== CMA_LISTEN
) && id_priv
->cma_dev
&&
722 cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
);
725 static void cma_destroy_listen(struct rdma_id_private
*id_priv
)
727 cma_exch(id_priv
, CMA_DESTROYING
);
729 if (id_priv
->cma_dev
) {
730 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
731 case RDMA_TRANSPORT_IB
:
732 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
733 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
735 case RDMA_TRANSPORT_IWARP
:
736 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
737 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
742 cma_detach_from_dev(id_priv
);
744 list_del(&id_priv
->listen_list
);
746 cma_deref_id(id_priv
);
747 wait_for_completion(&id_priv
->comp
);
752 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
754 struct rdma_id_private
*dev_id_priv
;
757 list_del(&id_priv
->list
);
759 while (!list_empty(&id_priv
->listen_list
)) {
760 dev_id_priv
= list_entry(id_priv
->listen_list
.next
,
761 struct rdma_id_private
, listen_list
);
762 cma_destroy_listen(dev_id_priv
);
767 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
768 enum cma_state state
)
772 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
774 case CMA_ROUTE_QUERY
:
775 cma_cancel_route(id_priv
);
778 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
) &&
780 cma_cancel_listens(id_priv
);
787 static void cma_release_port(struct rdma_id_private
*id_priv
)
789 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
795 hlist_del(&id_priv
->node
);
796 if (hlist_empty(&bind_list
->owners
)) {
797 idr_remove(bind_list
->ps
, bind_list
->port
);
803 static void cma_leave_mc_groups(struct rdma_id_private
*id_priv
)
805 struct cma_multicast
*mc
;
807 while (!list_empty(&id_priv
->mc_list
)) {
808 mc
= container_of(id_priv
->mc_list
.next
,
809 struct cma_multicast
, list
);
811 ib_sa_free_multicast(mc
->multicast
.ib
);
816 void rdma_destroy_id(struct rdma_cm_id
*id
)
818 struct rdma_id_private
*id_priv
;
819 enum cma_state state
;
821 id_priv
= container_of(id
, struct rdma_id_private
, id
);
822 state
= cma_exch(id_priv
, CMA_DESTROYING
);
823 cma_cancel_operation(id_priv
, state
);
826 if (id_priv
->cma_dev
) {
828 switch (rdma_node_get_transport(id
->device
->node_type
)) {
829 case RDMA_TRANSPORT_IB
:
830 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
831 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
833 case RDMA_TRANSPORT_IWARP
:
834 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
835 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
840 cma_leave_mc_groups(id_priv
);
842 cma_detach_from_dev(id_priv
);
846 cma_release_port(id_priv
);
847 cma_deref_id(id_priv
);
848 wait_for_completion(&id_priv
->comp
);
850 kfree(id_priv
->id
.route
.path_rec
);
853 EXPORT_SYMBOL(rdma_destroy_id
);
855 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
859 ret
= cma_modify_qp_rtr(&id_priv
->id
);
863 ret
= cma_modify_qp_rts(&id_priv
->id
);
867 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
873 cma_modify_qp_err(&id_priv
->id
);
874 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
879 static int cma_verify_rep(struct rdma_id_private
*id_priv
, void *data
)
881 if (id_priv
->id
.ps
== RDMA_PS_SDP
&&
882 sdp_get_majv(((struct sdp_hah
*) data
)->sdp_version
) !=
889 static void cma_set_rep_event_data(struct rdma_cm_event
*event
,
890 struct ib_cm_rep_event_param
*rep_data
,
893 event
->param
.conn
.private_data
= private_data
;
894 event
->param
.conn
.private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
895 event
->param
.conn
.responder_resources
= rep_data
->responder_resources
;
896 event
->param
.conn
.initiator_depth
= rep_data
->initiator_depth
;
897 event
->param
.conn
.flow_control
= rep_data
->flow_control
;
898 event
->param
.conn
.rnr_retry_count
= rep_data
->rnr_retry_count
;
899 event
->param
.conn
.srq
= rep_data
->srq
;
900 event
->param
.conn
.qp_num
= rep_data
->remote_qpn
;
903 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
905 struct rdma_id_private
*id_priv
= cm_id
->context
;
906 struct rdma_cm_event event
;
909 if (cma_disable_remove(id_priv
, CMA_CONNECT
))
912 memset(&event
, 0, sizeof event
);
913 switch (ib_event
->event
) {
914 case IB_CM_REQ_ERROR
:
915 case IB_CM_REP_ERROR
:
916 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
917 event
.status
= -ETIMEDOUT
;
919 case IB_CM_REP_RECEIVED
:
920 event
.status
= cma_verify_rep(id_priv
, ib_event
->private_data
);
922 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
923 else if (id_priv
->id
.qp
&& id_priv
->id
.ps
!= RDMA_PS_SDP
) {
924 event
.status
= cma_rep_recv(id_priv
);
925 event
.event
= event
.status
? RDMA_CM_EVENT_CONNECT_ERROR
:
926 RDMA_CM_EVENT_ESTABLISHED
;
928 event
.event
= RDMA_CM_EVENT_CONNECT_RESPONSE
;
929 cma_set_rep_event_data(&event
, &ib_event
->param
.rep_rcvd
,
930 ib_event
->private_data
);
932 case IB_CM_RTU_RECEIVED
:
933 case IB_CM_USER_ESTABLISHED
:
934 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
936 case IB_CM_DREQ_ERROR
:
937 event
.status
= -ETIMEDOUT
; /* fall through */
938 case IB_CM_DREQ_RECEIVED
:
939 case IB_CM_DREP_RECEIVED
:
940 if (!cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_DISCONNECT
))
942 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
944 case IB_CM_TIMEWAIT_EXIT
:
945 case IB_CM_MRA_RECEIVED
:
948 case IB_CM_REJ_RECEIVED
:
949 cma_modify_qp_err(&id_priv
->id
);
950 event
.status
= ib_event
->param
.rej_rcvd
.reason
;
951 event
.event
= RDMA_CM_EVENT_REJECTED
;
952 event
.param
.conn
.private_data
= ib_event
->private_data
;
953 event
.param
.conn
.private_data_len
= IB_CM_REJ_PRIVATE_DATA_SIZE
;
956 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
961 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
963 /* Destroy the CM ID by returning a non-zero value. */
964 id_priv
->cm_id
.ib
= NULL
;
965 cma_exch(id_priv
, CMA_DESTROYING
);
966 cma_enable_remove(id_priv
);
967 rdma_destroy_id(&id_priv
->id
);
971 cma_enable_remove(id_priv
);
975 static struct rdma_id_private
*cma_new_conn_id(struct rdma_cm_id
*listen_id
,
976 struct ib_cm_event
*ib_event
)
978 struct rdma_id_private
*id_priv
;
979 struct rdma_cm_id
*id
;
980 struct rdma_route
*rt
;
981 union cma_ip_addr
*src
, *dst
;
985 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
986 &ip_ver
, &port
, &src
, &dst
))
989 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
994 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
995 ip_ver
, port
, src
, dst
);
998 rt
->num_paths
= ib_event
->param
.req_rcvd
.alternate_path
? 2 : 1;
999 rt
->path_rec
= kmalloc(sizeof *rt
->path_rec
* rt
->num_paths
,
1004 rt
->path_rec
[0] = *ib_event
->param
.req_rcvd
.primary_path
;
1005 if (rt
->num_paths
== 2)
1006 rt
->path_rec
[1] = *ib_event
->param
.req_rcvd
.alternate_path
;
1008 ib_addr_set_sgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].sgid
);
1009 ib_addr_set_dgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].dgid
);
1010 ib_addr_set_pkey(&rt
->addr
.dev_addr
, be16_to_cpu(rt
->path_rec
[0].pkey
));
1011 rt
->addr
.dev_addr
.dev_type
= RDMA_NODE_IB_CA
;
1013 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1014 id_priv
->state
= CMA_CONNECT
;
1018 rdma_destroy_id(id
);
1023 static struct rdma_id_private
*cma_new_udp_id(struct rdma_cm_id
*listen_id
,
1024 struct ib_cm_event
*ib_event
)
1026 struct rdma_id_private
*id_priv
;
1027 struct rdma_cm_id
*id
;
1028 union cma_ip_addr
*src
, *dst
;
1033 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
1039 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
1040 &ip_ver
, &port
, &src
, &dst
))
1043 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
1044 ip_ver
, port
, src
, dst
);
1046 ret
= rdma_translate_ip(&id
->route
.addr
.src_addr
,
1047 &id
->route
.addr
.dev_addr
);
1051 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1052 id_priv
->state
= CMA_CONNECT
;
1055 rdma_destroy_id(id
);
1059 static void cma_set_req_event_data(struct rdma_cm_event
*event
,
1060 struct ib_cm_req_event_param
*req_data
,
1061 void *private_data
, int offset
)
1063 event
->param
.conn
.private_data
= private_data
+ offset
;
1064 event
->param
.conn
.private_data_len
= IB_CM_REQ_PRIVATE_DATA_SIZE
- offset
;
1065 event
->param
.conn
.responder_resources
= req_data
->responder_resources
;
1066 event
->param
.conn
.initiator_depth
= req_data
->initiator_depth
;
1067 event
->param
.conn
.flow_control
= req_data
->flow_control
;
1068 event
->param
.conn
.retry_count
= req_data
->retry_count
;
1069 event
->param
.conn
.rnr_retry_count
= req_data
->rnr_retry_count
;
1070 event
->param
.conn
.srq
= req_data
->srq
;
1071 event
->param
.conn
.qp_num
= req_data
->remote_qpn
;
1074 static int cma_req_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
1076 struct rdma_id_private
*listen_id
, *conn_id
;
1077 struct rdma_cm_event event
;
1080 listen_id
= cm_id
->context
;
1081 if (cma_disable_remove(listen_id
, CMA_LISTEN
))
1082 return -ECONNABORTED
;
1084 memset(&event
, 0, sizeof event
);
1085 offset
= cma_user_data_offset(listen_id
->id
.ps
);
1086 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1087 if (cma_is_ud_ps(listen_id
->id
.ps
)) {
1088 conn_id
= cma_new_udp_id(&listen_id
->id
, ib_event
);
1089 event
.param
.ud
.private_data
= ib_event
->private_data
+ offset
;
1090 event
.param
.ud
.private_data_len
=
1091 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
- offset
;
1093 conn_id
= cma_new_conn_id(&listen_id
->id
, ib_event
);
1094 cma_set_req_event_data(&event
, &ib_event
->param
.req_rcvd
,
1095 ib_event
->private_data
, offset
);
1102 atomic_inc(&conn_id
->dev_remove
);
1104 ret
= cma_acquire_dev(conn_id
);
1105 mutex_unlock(&lock
);
1107 goto release_conn_id
;
1109 conn_id
->cm_id
.ib
= cm_id
;
1110 cm_id
->context
= conn_id
;
1111 cm_id
->cm_handler
= cma_ib_handler
;
1113 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1117 /* Destroy the CM ID by returning a non-zero value. */
1118 conn_id
->cm_id
.ib
= NULL
;
1121 cma_exch(conn_id
, CMA_DESTROYING
);
1122 cma_enable_remove(conn_id
);
1123 rdma_destroy_id(&conn_id
->id
);
1126 cma_enable_remove(listen_id
);
1130 static __be64
cma_get_service_id(enum rdma_port_space ps
, struct sockaddr
*addr
)
1132 return cpu_to_be64(((u64
)ps
<< 16) + be16_to_cpu(cma_port(addr
)));
1135 static void cma_set_compare_data(enum rdma_port_space ps
, struct sockaddr
*addr
,
1136 struct ib_cm_compare_data
*compare
)
1138 struct cma_hdr
*cma_data
, *cma_mask
;
1139 struct sdp_hh
*sdp_data
, *sdp_mask
;
1141 struct in6_addr ip6_addr
;
1143 memset(compare
, 0, sizeof *compare
);
1144 cma_data
= (void *) compare
->data
;
1145 cma_mask
= (void *) compare
->mask
;
1146 sdp_data
= (void *) compare
->data
;
1147 sdp_mask
= (void *) compare
->mask
;
1149 switch (addr
->sa_family
) {
1151 ip4_addr
= ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
;
1152 if (ps
== RDMA_PS_SDP
) {
1153 sdp_set_ip_ver(sdp_data
, 4);
1154 sdp_set_ip_ver(sdp_mask
, 0xF);
1155 sdp_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1156 sdp_mask
->dst_addr
.ip4
.addr
= ~0;
1158 cma_set_ip_ver(cma_data
, 4);
1159 cma_set_ip_ver(cma_mask
, 0xF);
1160 cma_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1161 cma_mask
->dst_addr
.ip4
.addr
= ~0;
1165 ip6_addr
= ((struct sockaddr_in6
*) addr
)->sin6_addr
;
1166 if (ps
== RDMA_PS_SDP
) {
1167 sdp_set_ip_ver(sdp_data
, 6);
1168 sdp_set_ip_ver(sdp_mask
, 0xF);
1169 sdp_data
->dst_addr
.ip6
= ip6_addr
;
1170 memset(&sdp_mask
->dst_addr
.ip6
, 0xFF,
1171 sizeof sdp_mask
->dst_addr
.ip6
);
1173 cma_set_ip_ver(cma_data
, 6);
1174 cma_set_ip_ver(cma_mask
, 0xF);
1175 cma_data
->dst_addr
.ip6
= ip6_addr
;
1176 memset(&cma_mask
->dst_addr
.ip6
, 0xFF,
1177 sizeof cma_mask
->dst_addr
.ip6
);
1185 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1187 struct rdma_id_private
*id_priv
= iw_id
->context
;
1188 struct rdma_cm_event event
;
1189 struct sockaddr_in
*sin
;
1192 if (cma_disable_remove(id_priv
, CMA_CONNECT
))
1195 memset(&event
, 0, sizeof event
);
1196 switch (iw_event
->event
) {
1197 case IW_CM_EVENT_CLOSE
:
1198 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
1200 case IW_CM_EVENT_CONNECT_REPLY
:
1201 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1202 *sin
= iw_event
->local_addr
;
1203 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1204 *sin
= iw_event
->remote_addr
;
1205 switch (iw_event
->status
) {
1207 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1211 event
.event
= RDMA_CM_EVENT_REJECTED
;
1214 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1217 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
1221 case IW_CM_EVENT_ESTABLISHED
:
1222 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1228 event
.status
= iw_event
->status
;
1229 event
.param
.conn
.private_data
= iw_event
->private_data
;
1230 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1231 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
1233 /* Destroy the CM ID by returning a non-zero value. */
1234 id_priv
->cm_id
.iw
= NULL
;
1235 cma_exch(id_priv
, CMA_DESTROYING
);
1236 cma_enable_remove(id_priv
);
1237 rdma_destroy_id(&id_priv
->id
);
1241 cma_enable_remove(id_priv
);
1245 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
1246 struct iw_cm_event
*iw_event
)
1248 struct rdma_cm_id
*new_cm_id
;
1249 struct rdma_id_private
*listen_id
, *conn_id
;
1250 struct sockaddr_in
*sin
;
1251 struct net_device
*dev
= NULL
;
1252 struct rdma_cm_event event
;
1255 listen_id
= cm_id
->context
;
1256 if (cma_disable_remove(listen_id
, CMA_LISTEN
))
1257 return -ECONNABORTED
;
1259 /* Create a new RDMA id for the new IW CM ID */
1260 new_cm_id
= rdma_create_id(listen_id
->id
.event_handler
,
1261 listen_id
->id
.context
,
1267 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
1268 atomic_inc(&conn_id
->dev_remove
);
1269 conn_id
->state
= CMA_CONNECT
;
1271 dev
= ip_dev_find(iw_event
->local_addr
.sin_addr
.s_addr
);
1273 ret
= -EADDRNOTAVAIL
;
1274 cma_enable_remove(conn_id
);
1275 rdma_destroy_id(new_cm_id
);
1278 ret
= rdma_copy_addr(&conn_id
->id
.route
.addr
.dev_addr
, dev
, NULL
);
1280 cma_enable_remove(conn_id
);
1281 rdma_destroy_id(new_cm_id
);
1286 ret
= cma_acquire_dev(conn_id
);
1287 mutex_unlock(&lock
);
1289 cma_enable_remove(conn_id
);
1290 rdma_destroy_id(new_cm_id
);
1294 conn_id
->cm_id
.iw
= cm_id
;
1295 cm_id
->context
= conn_id
;
1296 cm_id
->cm_handler
= cma_iw_handler
;
1298 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.src_addr
;
1299 *sin
= iw_event
->local_addr
;
1300 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.dst_addr
;
1301 *sin
= iw_event
->remote_addr
;
1303 memset(&event
, 0, sizeof event
);
1304 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1305 event
.param
.conn
.private_data
= iw_event
->private_data
;
1306 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1307 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1309 /* User wants to destroy the CM ID */
1310 conn_id
->cm_id
.iw
= NULL
;
1311 cma_exch(conn_id
, CMA_DESTROYING
);
1312 cma_enable_remove(conn_id
);
1313 rdma_destroy_id(&conn_id
->id
);
1319 cma_enable_remove(listen_id
);
1323 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
1325 struct ib_cm_compare_data compare_data
;
1326 struct sockaddr
*addr
;
1330 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_req_handler
,
1332 if (IS_ERR(id_priv
->cm_id
.ib
))
1333 return PTR_ERR(id_priv
->cm_id
.ib
);
1335 addr
= &id_priv
->id
.route
.addr
.src_addr
;
1336 svc_id
= cma_get_service_id(id_priv
->id
.ps
, addr
);
1337 if (cma_any_addr(addr
))
1338 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, NULL
);
1340 cma_set_compare_data(id_priv
->id
.ps
, addr
, &compare_data
);
1341 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, &compare_data
);
1345 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1346 id_priv
->cm_id
.ib
= NULL
;
1352 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
1355 struct sockaddr_in
*sin
;
1357 id_priv
->cm_id
.iw
= iw_create_cm_id(id_priv
->id
.device
,
1358 iw_conn_req_handler
,
1360 if (IS_ERR(id_priv
->cm_id
.iw
))
1361 return PTR_ERR(id_priv
->cm_id
.iw
);
1363 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1364 id_priv
->cm_id
.iw
->local_addr
= *sin
;
1366 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
1369 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1370 id_priv
->cm_id
.iw
= NULL
;
1376 static int cma_listen_handler(struct rdma_cm_id
*id
,
1377 struct rdma_cm_event
*event
)
1379 struct rdma_id_private
*id_priv
= id
->context
;
1381 id
->context
= id_priv
->id
.context
;
1382 id
->event_handler
= id_priv
->id
.event_handler
;
1383 return id_priv
->id
.event_handler(id
, event
);
1386 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
1387 struct cma_device
*cma_dev
)
1389 struct rdma_id_private
*dev_id_priv
;
1390 struct rdma_cm_id
*id
;
1393 id
= rdma_create_id(cma_listen_handler
, id_priv
, id_priv
->id
.ps
);
1397 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
1399 dev_id_priv
->state
= CMA_ADDR_BOUND
;
1400 memcpy(&id
->route
.addr
.src_addr
, &id_priv
->id
.route
.addr
.src_addr
,
1401 ip_addr_size(&id_priv
->id
.route
.addr
.src_addr
));
1403 cma_attach_to_dev(dev_id_priv
, cma_dev
);
1404 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
1406 ret
= rdma_listen(id
, id_priv
->backlog
);
1412 cma_destroy_listen(dev_id_priv
);
1415 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
1417 struct cma_device
*cma_dev
;
1420 list_add_tail(&id_priv
->list
, &listen_any_list
);
1421 list_for_each_entry(cma_dev
, &dev_list
, list
)
1422 cma_listen_on_dev(id_priv
, cma_dev
);
1423 mutex_unlock(&lock
);
1426 static int cma_bind_any(struct rdma_cm_id
*id
, sa_family_t af
)
1428 struct sockaddr_in addr_in
;
1430 memset(&addr_in
, 0, sizeof addr_in
);
1431 addr_in
.sin_family
= af
;
1432 return rdma_bind_addr(id
, (struct sockaddr
*) &addr_in
);
1435 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
1437 struct rdma_id_private
*id_priv
;
1440 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1441 if (id_priv
->state
== CMA_IDLE
) {
1442 ret
= cma_bind_any(id
, AF_INET
);
1447 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_LISTEN
))
1450 id_priv
->backlog
= backlog
;
1452 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1453 case RDMA_TRANSPORT_IB
:
1454 ret
= cma_ib_listen(id_priv
);
1458 case RDMA_TRANSPORT_IWARP
:
1459 ret
= cma_iw_listen(id_priv
, backlog
);
1468 cma_listen_on_all(id_priv
);
1472 id_priv
->backlog
= 0;
1473 cma_comp_exch(id_priv
, CMA_LISTEN
, CMA_ADDR_BOUND
);
1476 EXPORT_SYMBOL(rdma_listen
);
1478 void rdma_set_service_type(struct rdma_cm_id
*id
, int tos
)
1480 struct rdma_id_private
*id_priv
;
1482 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1483 id_priv
->tos
= (u8
) tos
;
1485 EXPORT_SYMBOL(rdma_set_service_type
);
1487 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
1490 struct cma_work
*work
= context
;
1491 struct rdma_route
*route
;
1493 route
= &work
->id
->id
.route
;
1496 route
->num_paths
= 1;
1497 *route
->path_rec
= *path_rec
;
1499 work
->old_state
= CMA_ROUTE_QUERY
;
1500 work
->new_state
= CMA_ADDR_RESOLVED
;
1501 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
1502 work
->event
.status
= status
;
1505 queue_work(cma_wq
, &work
->work
);
1508 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
1509 struct cma_work
*work
)
1511 struct rdma_addr
*addr
= &id_priv
->id
.route
.addr
;
1512 struct ib_sa_path_rec path_rec
;
1513 ib_sa_comp_mask comp_mask
;
1514 struct sockaddr_in6
*sin6
;
1516 memset(&path_rec
, 0, sizeof path_rec
);
1517 ib_addr_get_sgid(&addr
->dev_addr
, &path_rec
.sgid
);
1518 ib_addr_get_dgid(&addr
->dev_addr
, &path_rec
.dgid
);
1519 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(&addr
->dev_addr
));
1520 path_rec
.numb_path
= 1;
1521 path_rec
.reversible
= 1;
1522 path_rec
.service_id
= cma_get_service_id(id_priv
->id
.ps
, &addr
->dst_addr
);
1524 comp_mask
= IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
1525 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
|
1526 IB_SA_PATH_REC_REVERSIBLE
| IB_SA_PATH_REC_SERVICE_ID
;
1528 if (addr
->src_addr
.sa_family
== AF_INET
) {
1529 path_rec
.qos_class
= cpu_to_be16((u16
) id_priv
->tos
);
1530 comp_mask
|= IB_SA_PATH_REC_QOS_CLASS
;
1532 sin6
= (struct sockaddr_in6
*) &addr
->src_addr
;
1533 path_rec
.traffic_class
= (u8
) (be32_to_cpu(sin6
->sin6_flowinfo
) >> 20);
1534 comp_mask
|= IB_SA_PATH_REC_TRAFFIC_CLASS
;
1537 id_priv
->query_id
= ib_sa_path_rec_get(&sa_client
, id_priv
->id
.device
,
1538 id_priv
->id
.port_num
, &path_rec
,
1539 comp_mask
, timeout_ms
,
1540 GFP_KERNEL
, cma_query_handler
,
1541 work
, &id_priv
->query
);
1543 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
1546 static void cma_work_handler(struct work_struct
*_work
)
1548 struct cma_work
*work
= container_of(_work
, struct cma_work
, work
);
1549 struct rdma_id_private
*id_priv
= work
->id
;
1552 atomic_inc(&id_priv
->dev_remove
);
1553 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
1556 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
1557 cma_exch(id_priv
, CMA_DESTROYING
);
1561 cma_enable_remove(id_priv
);
1562 cma_deref_id(id_priv
);
1564 rdma_destroy_id(&id_priv
->id
);
1568 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1570 struct rdma_route
*route
= &id_priv
->id
.route
;
1571 struct cma_work
*work
;
1574 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1579 INIT_WORK(&work
->work
, cma_work_handler
);
1580 work
->old_state
= CMA_ROUTE_QUERY
;
1581 work
->new_state
= CMA_ROUTE_RESOLVED
;
1582 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1584 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
1585 if (!route
->path_rec
) {
1590 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
1596 kfree(route
->path_rec
);
1597 route
->path_rec
= NULL
;
1603 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
1604 struct ib_sa_path_rec
*path_rec
, int num_paths
)
1606 struct rdma_id_private
*id_priv
;
1609 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1610 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_RESOLVED
))
1613 id
->route
.path_rec
= kmalloc(sizeof *path_rec
* num_paths
, GFP_KERNEL
);
1614 if (!id
->route
.path_rec
) {
1619 memcpy(id
->route
.path_rec
, path_rec
, sizeof *path_rec
* num_paths
);
1622 cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_ADDR_RESOLVED
);
1625 EXPORT_SYMBOL(rdma_set_ib_paths
);
1627 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1629 struct cma_work
*work
;
1631 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1636 INIT_WORK(&work
->work
, cma_work_handler
);
1637 work
->old_state
= CMA_ROUTE_QUERY
;
1638 work
->new_state
= CMA_ROUTE_RESOLVED
;
1639 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1640 queue_work(cma_wq
, &work
->work
);
1644 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
1646 struct rdma_id_private
*id_priv
;
1649 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1650 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_QUERY
))
1653 atomic_inc(&id_priv
->refcount
);
1654 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1655 case RDMA_TRANSPORT_IB
:
1656 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
1658 case RDMA_TRANSPORT_IWARP
:
1659 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
1670 cma_comp_exch(id_priv
, CMA_ROUTE_QUERY
, CMA_ADDR_RESOLVED
);
1671 cma_deref_id(id_priv
);
1674 EXPORT_SYMBOL(rdma_resolve_route
);
1676 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
1678 struct cma_device
*cma_dev
;
1679 struct ib_port_attr port_attr
;
1686 if (list_empty(&dev_list
)) {
1690 list_for_each_entry(cma_dev
, &dev_list
, list
)
1691 for (p
= 1; p
<= cma_dev
->device
->phys_port_cnt
; ++p
)
1692 if (!ib_query_port(cma_dev
->device
, p
, &port_attr
) &&
1693 port_attr
.state
== IB_PORT_ACTIVE
)
1697 cma_dev
= list_entry(dev_list
.next
, struct cma_device
, list
);
1700 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
);
1704 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
1708 ib_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1709 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
1710 id_priv
->id
.port_num
= p
;
1711 cma_attach_to_dev(id_priv
, cma_dev
);
1713 mutex_unlock(&lock
);
1717 static void addr_handler(int status
, struct sockaddr
*src_addr
,
1718 struct rdma_dev_addr
*dev_addr
, void *context
)
1720 struct rdma_id_private
*id_priv
= context
;
1721 struct rdma_cm_event event
;
1723 memset(&event
, 0, sizeof event
);
1724 atomic_inc(&id_priv
->dev_remove
);
1727 * Grab mutex to block rdma_destroy_id() from removing the device while
1728 * we're trying to acquire it.
1731 if (!cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_RESOLVED
)) {
1732 mutex_unlock(&lock
);
1736 if (!status
&& !id_priv
->cma_dev
)
1737 status
= cma_acquire_dev(id_priv
);
1738 mutex_unlock(&lock
);
1741 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ADDR_BOUND
))
1743 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
1744 event
.status
= status
;
1746 memcpy(&id_priv
->id
.route
.addr
.src_addr
, src_addr
,
1747 ip_addr_size(src_addr
));
1748 event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1751 if (id_priv
->id
.event_handler(&id_priv
->id
, &event
)) {
1752 cma_exch(id_priv
, CMA_DESTROYING
);
1753 cma_enable_remove(id_priv
);
1754 cma_deref_id(id_priv
);
1755 rdma_destroy_id(&id_priv
->id
);
1759 cma_enable_remove(id_priv
);
1760 cma_deref_id(id_priv
);
1763 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
1765 struct cma_work
*work
;
1766 struct sockaddr_in
*src_in
, *dst_in
;
1770 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1774 if (!id_priv
->cma_dev
) {
1775 ret
= cma_bind_loopback(id_priv
);
1780 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1781 ib_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1783 if (cma_zero_addr(&id_priv
->id
.route
.addr
.src_addr
)) {
1784 src_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.src_addr
;
1785 dst_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.dst_addr
;
1786 src_in
->sin_family
= dst_in
->sin_family
;
1787 src_in
->sin_addr
.s_addr
= dst_in
->sin_addr
.s_addr
;
1791 INIT_WORK(&work
->work
, cma_work_handler
);
1792 work
->old_state
= CMA_ADDR_QUERY
;
1793 work
->new_state
= CMA_ADDR_RESOLVED
;
1794 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1795 queue_work(cma_wq
, &work
->work
);
1802 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1803 struct sockaddr
*dst_addr
)
1805 if (src_addr
&& src_addr
->sa_family
)
1806 return rdma_bind_addr(id
, src_addr
);
1808 return cma_bind_any(id
, dst_addr
->sa_family
);
1811 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1812 struct sockaddr
*dst_addr
, int timeout_ms
)
1814 struct rdma_id_private
*id_priv
;
1817 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1818 if (id_priv
->state
== CMA_IDLE
) {
1819 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
1824 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_ADDR_QUERY
))
1827 atomic_inc(&id_priv
->refcount
);
1828 memcpy(&id
->route
.addr
.dst_addr
, dst_addr
, ip_addr_size(dst_addr
));
1829 if (cma_any_addr(dst_addr
))
1830 ret
= cma_resolve_loopback(id_priv
);
1832 ret
= rdma_resolve_ip(&addr_client
, &id
->route
.addr
.src_addr
,
1833 dst_addr
, &id
->route
.addr
.dev_addr
,
1834 timeout_ms
, addr_handler
, id_priv
);
1840 cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_BOUND
);
1841 cma_deref_id(id_priv
);
1844 EXPORT_SYMBOL(rdma_resolve_addr
);
1846 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
1847 struct rdma_id_private
*id_priv
)
1849 struct sockaddr_in
*sin
;
1851 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1852 sin
->sin_port
= htons(bind_list
->port
);
1853 id_priv
->bind_list
= bind_list
;
1854 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
1857 static int cma_alloc_port(struct idr
*ps
, struct rdma_id_private
*id_priv
,
1858 unsigned short snum
)
1860 struct rdma_bind_list
*bind_list
;
1863 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1868 ret
= idr_get_new_above(ps
, bind_list
, snum
, &port
);
1869 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1875 ret
= -EADDRNOTAVAIL
;
1880 bind_list
->port
= (unsigned short) port
;
1881 cma_bind_port(bind_list
, id_priv
);
1884 idr_remove(ps
, port
);
1890 static int cma_alloc_any_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1892 struct rdma_bind_list
*bind_list
;
1895 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1901 ret
= idr_get_new_above(ps
, bind_list
, next_port
, &port
);
1902 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1907 if (port
> sysctl_local_port_range
[1]) {
1908 if (next_port
!= sysctl_local_port_range
[0]) {
1909 idr_remove(ps
, port
);
1910 next_port
= sysctl_local_port_range
[0];
1913 ret
= -EADDRNOTAVAIL
;
1917 if (port
== sysctl_local_port_range
[1])
1918 next_port
= sysctl_local_port_range
[0];
1920 next_port
= port
+ 1;
1923 bind_list
->port
= (unsigned short) port
;
1924 cma_bind_port(bind_list
, id_priv
);
1927 idr_remove(ps
, port
);
1933 static int cma_use_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1935 struct rdma_id_private
*cur_id
;
1936 struct sockaddr_in
*sin
, *cur_sin
;
1937 struct rdma_bind_list
*bind_list
;
1938 struct hlist_node
*node
;
1939 unsigned short snum
;
1941 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1942 snum
= ntohs(sin
->sin_port
);
1943 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
1946 bind_list
= idr_find(ps
, snum
);
1948 return cma_alloc_port(ps
, id_priv
, snum
);
1951 * We don't support binding to any address if anyone is bound to
1952 * a specific address on the same port.
1954 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
))
1955 return -EADDRNOTAVAIL
;
1957 hlist_for_each_entry(cur_id
, node
, &bind_list
->owners
, node
) {
1958 if (cma_any_addr(&cur_id
->id
.route
.addr
.src_addr
))
1959 return -EADDRNOTAVAIL
;
1961 cur_sin
= (struct sockaddr_in
*) &cur_id
->id
.route
.addr
.src_addr
;
1962 if (sin
->sin_addr
.s_addr
== cur_sin
->sin_addr
.s_addr
)
1966 cma_bind_port(bind_list
, id_priv
);
1970 static int cma_get_port(struct rdma_id_private
*id_priv
)
1975 switch (id_priv
->id
.ps
) {
1989 return -EPROTONOSUPPORT
;
1993 if (cma_any_port(&id_priv
->id
.route
.addr
.src_addr
))
1994 ret
= cma_alloc_any_port(ps
, id_priv
);
1996 ret
= cma_use_port(ps
, id_priv
);
1997 mutex_unlock(&lock
);
2002 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
2004 struct rdma_id_private
*id_priv
;
2007 if (addr
->sa_family
!= AF_INET
)
2008 return -EAFNOSUPPORT
;
2010 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2011 if (!cma_comp_exch(id_priv
, CMA_IDLE
, CMA_ADDR_BOUND
))
2014 if (!cma_any_addr(addr
)) {
2015 ret
= rdma_translate_ip(addr
, &id
->route
.addr
.dev_addr
);
2020 ret
= cma_acquire_dev(id_priv
);
2021 mutex_unlock(&lock
);
2026 memcpy(&id
->route
.addr
.src_addr
, addr
, ip_addr_size(addr
));
2027 ret
= cma_get_port(id_priv
);
2033 if (!cma_any_addr(addr
)) {
2035 cma_detach_from_dev(id_priv
);
2036 mutex_unlock(&lock
);
2039 cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_IDLE
);
2042 EXPORT_SYMBOL(rdma_bind_addr
);
2044 static int cma_format_hdr(void *hdr
, enum rdma_port_space ps
,
2045 struct rdma_route
*route
)
2047 struct sockaddr_in
*src4
, *dst4
;
2048 struct cma_hdr
*cma_hdr
;
2049 struct sdp_hh
*sdp_hdr
;
2051 src4
= (struct sockaddr_in
*) &route
->addr
.src_addr
;
2052 dst4
= (struct sockaddr_in
*) &route
->addr
.dst_addr
;
2057 if (sdp_get_majv(sdp_hdr
->sdp_version
) != SDP_MAJ_VERSION
)
2059 sdp_set_ip_ver(sdp_hdr
, 4);
2060 sdp_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2061 sdp_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2062 sdp_hdr
->port
= src4
->sin_port
;
2066 cma_hdr
->cma_version
= CMA_VERSION
;
2067 cma_set_ip_ver(cma_hdr
, 4);
2068 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2069 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2070 cma_hdr
->port
= src4
->sin_port
;
2076 static int cma_sidr_rep_handler(struct ib_cm_id
*cm_id
,
2077 struct ib_cm_event
*ib_event
)
2079 struct rdma_id_private
*id_priv
= cm_id
->context
;
2080 struct rdma_cm_event event
;
2081 struct ib_cm_sidr_rep_event_param
*rep
= &ib_event
->param
.sidr_rep_rcvd
;
2084 if (cma_disable_remove(id_priv
, CMA_CONNECT
))
2087 memset(&event
, 0, sizeof event
);
2088 switch (ib_event
->event
) {
2089 case IB_CM_SIDR_REQ_ERROR
:
2090 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2091 event
.status
= -ETIMEDOUT
;
2093 case IB_CM_SIDR_REP_RECEIVED
:
2094 event
.param
.ud
.private_data
= ib_event
->private_data
;
2095 event
.param
.ud
.private_data_len
= IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
;
2096 if (rep
->status
!= IB_SIDR_SUCCESS
) {
2097 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2098 event
.status
= ib_event
->param
.sidr_rep_rcvd
.status
;
2101 if (id_priv
->qkey
!= rep
->qkey
) {
2102 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2103 event
.status
= -EINVAL
;
2106 ib_init_ah_from_path(id_priv
->id
.device
, id_priv
->id
.port_num
,
2107 id_priv
->id
.route
.path_rec
,
2108 &event
.param
.ud
.ah_attr
);
2109 event
.param
.ud
.qp_num
= rep
->qpn
;
2110 event
.param
.ud
.qkey
= rep
->qkey
;
2111 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
2115 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
2120 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2122 /* Destroy the CM ID by returning a non-zero value. */
2123 id_priv
->cm_id
.ib
= NULL
;
2124 cma_exch(id_priv
, CMA_DESTROYING
);
2125 cma_enable_remove(id_priv
);
2126 rdma_destroy_id(&id_priv
->id
);
2130 cma_enable_remove(id_priv
);
2134 static int cma_resolve_ib_udp(struct rdma_id_private
*id_priv
,
2135 struct rdma_conn_param
*conn_param
)
2137 struct ib_cm_sidr_req_param req
;
2138 struct rdma_route
*route
;
2141 req
.private_data_len
= sizeof(struct cma_hdr
) +
2142 conn_param
->private_data_len
;
2143 req
.private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2144 if (!req
.private_data
)
2147 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2148 memcpy((void *) req
.private_data
+ sizeof(struct cma_hdr
),
2149 conn_param
->private_data
, conn_param
->private_data_len
);
2151 route
= &id_priv
->id
.route
;
2152 ret
= cma_format_hdr((void *) req
.private_data
, id_priv
->id
.ps
, route
);
2156 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
,
2157 cma_sidr_rep_handler
, id_priv
);
2158 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2159 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2163 req
.path
= route
->path_rec
;
2164 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2165 &route
->addr
.dst_addr
);
2166 req
.timeout_ms
= 1 << (CMA_CM_RESPONSE_TIMEOUT
- 8);
2167 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2169 ret
= ib_send_cm_sidr_req(id_priv
->cm_id
.ib
, &req
);
2171 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2172 id_priv
->cm_id
.ib
= NULL
;
2175 kfree(req
.private_data
);
2179 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
2180 struct rdma_conn_param
*conn_param
)
2182 struct ib_cm_req_param req
;
2183 struct rdma_route
*route
;
2187 memset(&req
, 0, sizeof req
);
2188 offset
= cma_user_data_offset(id_priv
->id
.ps
);
2189 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
2190 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2194 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2195 memcpy(private_data
+ offset
, conn_param
->private_data
,
2196 conn_param
->private_data_len
);
2198 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
,
2200 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2201 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2205 route
= &id_priv
->id
.route
;
2206 ret
= cma_format_hdr(private_data
, id_priv
->id
.ps
, route
);
2209 req
.private_data
= private_data
;
2211 req
.primary_path
= &route
->path_rec
[0];
2212 if (route
->num_paths
== 2)
2213 req
.alternate_path
= &route
->path_rec
[1];
2215 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2216 &route
->addr
.dst_addr
);
2217 req
.qp_num
= id_priv
->qp_num
;
2218 req
.qp_type
= IB_QPT_RC
;
2219 req
.starting_psn
= id_priv
->seq_num
;
2220 req
.responder_resources
= conn_param
->responder_resources
;
2221 req
.initiator_depth
= conn_param
->initiator_depth
;
2222 req
.flow_control
= conn_param
->flow_control
;
2223 req
.retry_count
= conn_param
->retry_count
;
2224 req
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2225 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2226 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2227 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2228 req
.srq
= id_priv
->srq
? 1 : 0;
2230 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
2232 if (ret
&& !IS_ERR(id_priv
->cm_id
.ib
)) {
2233 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2234 id_priv
->cm_id
.ib
= NULL
;
2237 kfree(private_data
);
2241 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
2242 struct rdma_conn_param
*conn_param
)
2244 struct iw_cm_id
*cm_id
;
2245 struct sockaddr_in
* sin
;
2247 struct iw_cm_conn_param iw_param
;
2249 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
2250 if (IS_ERR(cm_id
)) {
2251 ret
= PTR_ERR(cm_id
);
2255 id_priv
->cm_id
.iw
= cm_id
;
2257 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
2258 cm_id
->local_addr
= *sin
;
2260 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
2261 cm_id
->remote_addr
= *sin
;
2263 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2267 iw_param
.ord
= conn_param
->initiator_depth
;
2268 iw_param
.ird
= conn_param
->responder_resources
;
2269 iw_param
.private_data
= conn_param
->private_data
;
2270 iw_param
.private_data_len
= conn_param
->private_data_len
;
2272 iw_param
.qpn
= id_priv
->qp_num
;
2274 iw_param
.qpn
= conn_param
->qp_num
;
2275 ret
= iw_cm_connect(cm_id
, &iw_param
);
2277 if (ret
&& !IS_ERR(cm_id
)) {
2278 iw_destroy_cm_id(cm_id
);
2279 id_priv
->cm_id
.iw
= NULL
;
2284 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2286 struct rdma_id_private
*id_priv
;
2289 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2290 if (!cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_CONNECT
))
2294 id_priv
->qp_num
= conn_param
->qp_num
;
2295 id_priv
->srq
= conn_param
->srq
;
2298 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2299 case RDMA_TRANSPORT_IB
:
2300 if (cma_is_ud_ps(id
->ps
))
2301 ret
= cma_resolve_ib_udp(id_priv
, conn_param
);
2303 ret
= cma_connect_ib(id_priv
, conn_param
);
2305 case RDMA_TRANSPORT_IWARP
:
2306 ret
= cma_connect_iw(id_priv
, conn_param
);
2317 cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_ROUTE_RESOLVED
);
2320 EXPORT_SYMBOL(rdma_connect
);
2322 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
2323 struct rdma_conn_param
*conn_param
)
2325 struct ib_cm_rep_param rep
;
2326 struct ib_qp_attr qp_attr
;
2327 int qp_attr_mask
, ret
;
2329 if (id_priv
->id
.qp
) {
2330 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2334 qp_attr
.qp_state
= IB_QPS_RTS
;
2335 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, &qp_attr
,
2340 qp_attr
.max_rd_atomic
= conn_param
->initiator_depth
;
2341 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
2346 memset(&rep
, 0, sizeof rep
);
2347 rep
.qp_num
= id_priv
->qp_num
;
2348 rep
.starting_psn
= id_priv
->seq_num
;
2349 rep
.private_data
= conn_param
->private_data
;
2350 rep
.private_data_len
= conn_param
->private_data_len
;
2351 rep
.responder_resources
= conn_param
->responder_resources
;
2352 rep
.initiator_depth
= conn_param
->initiator_depth
;
2353 rep
.failover_accepted
= 0;
2354 rep
.flow_control
= conn_param
->flow_control
;
2355 rep
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2356 rep
.srq
= id_priv
->srq
? 1 : 0;
2358 ret
= ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
2363 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
2364 struct rdma_conn_param
*conn_param
)
2366 struct iw_cm_conn_param iw_param
;
2369 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2373 iw_param
.ord
= conn_param
->initiator_depth
;
2374 iw_param
.ird
= conn_param
->responder_resources
;
2375 iw_param
.private_data
= conn_param
->private_data
;
2376 iw_param
.private_data_len
= conn_param
->private_data_len
;
2377 if (id_priv
->id
.qp
) {
2378 iw_param
.qpn
= id_priv
->qp_num
;
2380 iw_param
.qpn
= conn_param
->qp_num
;
2382 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
2385 static int cma_send_sidr_rep(struct rdma_id_private
*id_priv
,
2386 enum ib_cm_sidr_status status
,
2387 const void *private_data
, int private_data_len
)
2389 struct ib_cm_sidr_rep_param rep
;
2391 memset(&rep
, 0, sizeof rep
);
2392 rep
.status
= status
;
2393 if (status
== IB_SIDR_SUCCESS
) {
2394 rep
.qp_num
= id_priv
->qp_num
;
2395 rep
.qkey
= id_priv
->qkey
;
2397 rep
.private_data
= private_data
;
2398 rep
.private_data_len
= private_data_len
;
2400 return ib_send_cm_sidr_rep(id_priv
->cm_id
.ib
, &rep
);
2403 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2405 struct rdma_id_private
*id_priv
;
2408 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2409 if (!cma_comp(id_priv
, CMA_CONNECT
))
2412 if (!id
->qp
&& conn_param
) {
2413 id_priv
->qp_num
= conn_param
->qp_num
;
2414 id_priv
->srq
= conn_param
->srq
;
2417 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2418 case RDMA_TRANSPORT_IB
:
2419 if (cma_is_ud_ps(id
->ps
))
2420 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
2421 conn_param
->private_data
,
2422 conn_param
->private_data_len
);
2423 else if (conn_param
)
2424 ret
= cma_accept_ib(id_priv
, conn_param
);
2426 ret
= cma_rep_recv(id_priv
);
2428 case RDMA_TRANSPORT_IWARP
:
2429 ret
= cma_accept_iw(id_priv
, conn_param
);
2441 cma_modify_qp_err(id
);
2442 rdma_reject(id
, NULL
, 0);
2445 EXPORT_SYMBOL(rdma_accept
);
2447 int rdma_notify(struct rdma_cm_id
*id
, enum ib_event_type event
)
2449 struct rdma_id_private
*id_priv
;
2452 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2453 if (!cma_has_cm_dev(id_priv
))
2456 switch (id
->device
->node_type
) {
2457 case RDMA_NODE_IB_CA
:
2458 ret
= ib_cm_notify(id_priv
->cm_id
.ib
, event
);
2466 EXPORT_SYMBOL(rdma_notify
);
2468 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
2469 u8 private_data_len
)
2471 struct rdma_id_private
*id_priv
;
2474 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2475 if (!cma_has_cm_dev(id_priv
))
2478 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2479 case RDMA_TRANSPORT_IB
:
2480 if (cma_is_ud_ps(id
->ps
))
2481 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_REJECT
,
2482 private_data
, private_data_len
);
2484 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
2485 IB_CM_REJ_CONSUMER_DEFINED
, NULL
,
2486 0, private_data
, private_data_len
);
2488 case RDMA_TRANSPORT_IWARP
:
2489 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
2490 private_data
, private_data_len
);
2498 EXPORT_SYMBOL(rdma_reject
);
2500 int rdma_disconnect(struct rdma_cm_id
*id
)
2502 struct rdma_id_private
*id_priv
;
2505 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2506 if (!cma_has_cm_dev(id_priv
))
2509 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2510 case RDMA_TRANSPORT_IB
:
2511 ret
= cma_modify_qp_err(id
);
2514 /* Initiate or respond to a disconnect. */
2515 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
2516 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
2518 case RDMA_TRANSPORT_IWARP
:
2519 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
2528 EXPORT_SYMBOL(rdma_disconnect
);
2530 static int cma_ib_mc_handler(int status
, struct ib_sa_multicast
*multicast
)
2532 struct rdma_id_private
*id_priv
;
2533 struct cma_multicast
*mc
= multicast
->context
;
2534 struct rdma_cm_event event
;
2537 id_priv
= mc
->id_priv
;
2538 if (cma_disable_remove(id_priv
, CMA_ADDR_BOUND
) &&
2539 cma_disable_remove(id_priv
, CMA_ADDR_RESOLVED
))
2542 if (!status
&& id_priv
->id
.qp
)
2543 status
= ib_attach_mcast(id_priv
->id
.qp
, &multicast
->rec
.mgid
,
2544 multicast
->rec
.mlid
);
2546 memset(&event
, 0, sizeof event
);
2547 event
.status
= status
;
2548 event
.param
.ud
.private_data
= mc
->context
;
2550 event
.event
= RDMA_CM_EVENT_MULTICAST_JOIN
;
2551 ib_init_ah_from_mcmember(id_priv
->id
.device
,
2552 id_priv
->id
.port_num
, &multicast
->rec
,
2553 &event
.param
.ud
.ah_attr
);
2554 event
.param
.ud
.qp_num
= 0xFFFFFF;
2555 event
.param
.ud
.qkey
= be32_to_cpu(multicast
->rec
.qkey
);
2557 event
.event
= RDMA_CM_EVENT_MULTICAST_ERROR
;
2559 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2561 cma_exch(id_priv
, CMA_DESTROYING
);
2562 cma_enable_remove(id_priv
);
2563 rdma_destroy_id(&id_priv
->id
);
2567 cma_enable_remove(id_priv
);
2571 static void cma_set_mgid(struct rdma_id_private
*id_priv
,
2572 struct sockaddr
*addr
, union ib_gid
*mgid
)
2574 unsigned char mc_map
[MAX_ADDR_LEN
];
2575 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2576 struct sockaddr_in
*sin
= (struct sockaddr_in
*) addr
;
2577 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) addr
;
2579 if (cma_any_addr(addr
)) {
2580 memset(mgid
, 0, sizeof *mgid
);
2581 } else if ((addr
->sa_family
== AF_INET6
) &&
2582 ((be32_to_cpu(sin6
->sin6_addr
.s6_addr32
[0]) & 0xFF10A01B) ==
2584 /* IPv6 address is an SA assigned MGID. */
2585 memcpy(mgid
, &sin6
->sin6_addr
, sizeof *mgid
);
2587 ip_ib_mc_map(sin
->sin_addr
.s_addr
, mc_map
);
2588 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2589 mc_map
[7] = 0x01; /* Use RDMA CM signature */
2590 mc_map
[8] = ib_addr_get_pkey(dev_addr
) >> 8;
2591 mc_map
[9] = (unsigned char) ib_addr_get_pkey(dev_addr
);
2592 *mgid
= *(union ib_gid
*) (mc_map
+ 4);
2596 static int cma_join_ib_multicast(struct rdma_id_private
*id_priv
,
2597 struct cma_multicast
*mc
)
2599 struct ib_sa_mcmember_rec rec
;
2600 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2601 ib_sa_comp_mask comp_mask
;
2604 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
2605 ret
= ib_sa_get_mcmember_rec(id_priv
->id
.device
, id_priv
->id
.port_num
,
2610 cma_set_mgid(id_priv
, &mc
->addr
, &rec
.mgid
);
2611 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2612 rec
.qkey
= cpu_to_be32(RDMA_UDP_QKEY
);
2613 ib_addr_get_sgid(dev_addr
, &rec
.port_gid
);
2614 rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(dev_addr
));
2617 comp_mask
= IB_SA_MCMEMBER_REC_MGID
| IB_SA_MCMEMBER_REC_PORT_GID
|
2618 IB_SA_MCMEMBER_REC_PKEY
| IB_SA_MCMEMBER_REC_JOIN_STATE
|
2619 IB_SA_MCMEMBER_REC_QKEY
| IB_SA_MCMEMBER_REC_SL
|
2620 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
2621 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
;
2623 mc
->multicast
.ib
= ib_sa_join_multicast(&sa_client
, id_priv
->id
.device
,
2624 id_priv
->id
.port_num
, &rec
,
2625 comp_mask
, GFP_KERNEL
,
2626 cma_ib_mc_handler
, mc
);
2627 if (IS_ERR(mc
->multicast
.ib
))
2628 return PTR_ERR(mc
->multicast
.ib
);
2633 int rdma_join_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
,
2636 struct rdma_id_private
*id_priv
;
2637 struct cma_multicast
*mc
;
2640 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2641 if (!cma_comp(id_priv
, CMA_ADDR_BOUND
) &&
2642 !cma_comp(id_priv
, CMA_ADDR_RESOLVED
))
2645 mc
= kmalloc(sizeof *mc
, GFP_KERNEL
);
2649 memcpy(&mc
->addr
, addr
, ip_addr_size(addr
));
2650 mc
->context
= context
;
2651 mc
->id_priv
= id_priv
;
2653 spin_lock(&id_priv
->lock
);
2654 list_add(&mc
->list
, &id_priv
->mc_list
);
2655 spin_unlock(&id_priv
->lock
);
2657 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2658 case RDMA_TRANSPORT_IB
:
2659 ret
= cma_join_ib_multicast(id_priv
, mc
);
2667 spin_lock_irq(&id_priv
->lock
);
2668 list_del(&mc
->list
);
2669 spin_unlock_irq(&id_priv
->lock
);
2674 EXPORT_SYMBOL(rdma_join_multicast
);
2676 void rdma_leave_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
2678 struct rdma_id_private
*id_priv
;
2679 struct cma_multicast
*mc
;
2681 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2682 spin_lock_irq(&id_priv
->lock
);
2683 list_for_each_entry(mc
, &id_priv
->mc_list
, list
) {
2684 if (!memcmp(&mc
->addr
, addr
, ip_addr_size(addr
))) {
2685 list_del(&mc
->list
);
2686 spin_unlock_irq(&id_priv
->lock
);
2689 ib_detach_mcast(id
->qp
,
2690 &mc
->multicast
.ib
->rec
.mgid
,
2691 mc
->multicast
.ib
->rec
.mlid
);
2692 ib_sa_free_multicast(mc
->multicast
.ib
);
2697 spin_unlock_irq(&id_priv
->lock
);
2699 EXPORT_SYMBOL(rdma_leave_multicast
);
2701 static void cma_add_one(struct ib_device
*device
)
2703 struct cma_device
*cma_dev
;
2704 struct rdma_id_private
*id_priv
;
2706 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
2710 cma_dev
->device
= device
;
2712 init_completion(&cma_dev
->comp
);
2713 atomic_set(&cma_dev
->refcount
, 1);
2714 INIT_LIST_HEAD(&cma_dev
->id_list
);
2715 ib_set_client_data(device
, &cma_client
, cma_dev
);
2718 list_add_tail(&cma_dev
->list
, &dev_list
);
2719 list_for_each_entry(id_priv
, &listen_any_list
, list
)
2720 cma_listen_on_dev(id_priv
, cma_dev
);
2721 mutex_unlock(&lock
);
2724 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
2726 struct rdma_cm_event event
;
2727 enum cma_state state
;
2729 /* Record that we want to remove the device */
2730 state
= cma_exch(id_priv
, CMA_DEVICE_REMOVAL
);
2731 if (state
== CMA_DESTROYING
)
2734 cma_cancel_operation(id_priv
, state
);
2735 wait_event(id_priv
->wait_remove
, !atomic_read(&id_priv
->dev_remove
));
2737 /* Check for destruction from another callback. */
2738 if (!cma_comp(id_priv
, CMA_DEVICE_REMOVAL
))
2741 memset(&event
, 0, sizeof event
);
2742 event
.event
= RDMA_CM_EVENT_DEVICE_REMOVAL
;
2743 return id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2746 static void cma_process_remove(struct cma_device
*cma_dev
)
2748 struct rdma_id_private
*id_priv
;
2752 while (!list_empty(&cma_dev
->id_list
)) {
2753 id_priv
= list_entry(cma_dev
->id_list
.next
,
2754 struct rdma_id_private
, list
);
2756 if (cma_internal_listen(id_priv
)) {
2757 cma_destroy_listen(id_priv
);
2761 list_del_init(&id_priv
->list
);
2762 atomic_inc(&id_priv
->refcount
);
2763 mutex_unlock(&lock
);
2765 ret
= cma_remove_id_dev(id_priv
);
2766 cma_deref_id(id_priv
);
2768 rdma_destroy_id(&id_priv
->id
);
2772 mutex_unlock(&lock
);
2774 cma_deref_dev(cma_dev
);
2775 wait_for_completion(&cma_dev
->comp
);
2778 static void cma_remove_one(struct ib_device
*device
)
2780 struct cma_device
*cma_dev
;
2782 cma_dev
= ib_get_client_data(device
, &cma_client
);
2787 list_del(&cma_dev
->list
);
2788 mutex_unlock(&lock
);
2790 cma_process_remove(cma_dev
);
2794 static int cma_init(void)
2798 get_random_bytes(&next_port
, sizeof next_port
);
2799 next_port
= ((unsigned int) next_port
%
2800 (sysctl_local_port_range
[1] - sysctl_local_port_range
[0])) +
2801 sysctl_local_port_range
[0];
2802 cma_wq
= create_singlethread_workqueue("rdma_cm");
2806 ib_sa_register_client(&sa_client
);
2807 rdma_addr_register_client(&addr_client
);
2809 ret
= ib_register_client(&cma_client
);
2815 rdma_addr_unregister_client(&addr_client
);
2816 ib_sa_unregister_client(&sa_client
);
2817 destroy_workqueue(cma_wq
);
2821 static void cma_cleanup(void)
2823 ib_unregister_client(&cma_client
);
2824 rdma_addr_unregister_client(&addr_client
);
2825 ib_sa_unregister_client(&sa_client
);
2826 destroy_workqueue(cma_wq
);
2827 idr_destroy(&sdp_ps
);
2828 idr_destroy(&tcp_ps
);
2829 idr_destroy(&udp_ps
);
2830 idr_destroy(&ipoib_ps
);
2833 module_init(cma_init
);
2834 module_exit(cma_cleanup
);