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
;
143 struct cma_multicast
{
144 struct rdma_id_private
*id_priv
;
146 struct ib_sa_multicast
*ib
;
148 struct list_head list
;
150 struct sockaddr addr
;
151 u8 pad
[sizeof(struct sockaddr_in6
) -
152 sizeof(struct sockaddr
)];
156 struct work_struct work
;
157 struct rdma_id_private
*id
;
158 enum cma_state old_state
;
159 enum cma_state new_state
;
160 struct rdma_cm_event event
;
173 u8 ip_version
; /* IP version: 7:4 */
175 union cma_ip_addr src_addr
;
176 union cma_ip_addr dst_addr
;
181 u8 sdp_version
; /* Major version: 7:4 */
182 u8 ip_version
; /* IP version: 7:4 */
183 u8 sdp_specific1
[10];
186 union cma_ip_addr src_addr
;
187 union cma_ip_addr dst_addr
;
195 #define CMA_VERSION 0x00
196 #define SDP_MAJ_VERSION 0x2
198 static int cma_comp(struct rdma_id_private
*id_priv
, enum cma_state comp
)
203 spin_lock_irqsave(&id_priv
->lock
, flags
);
204 ret
= (id_priv
->state
== comp
);
205 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
209 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
210 enum cma_state comp
, enum cma_state exch
)
215 spin_lock_irqsave(&id_priv
->lock
, flags
);
216 if ((ret
= (id_priv
->state
== comp
)))
217 id_priv
->state
= exch
;
218 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
222 static enum cma_state
cma_exch(struct rdma_id_private
*id_priv
,
228 spin_lock_irqsave(&id_priv
->lock
, flags
);
229 old
= id_priv
->state
;
230 id_priv
->state
= exch
;
231 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
235 static inline u8
cma_get_ip_ver(struct cma_hdr
*hdr
)
237 return hdr
->ip_version
>> 4;
240 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
242 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
245 static inline u8
sdp_get_majv(u8 sdp_version
)
247 return sdp_version
>> 4;
250 static inline u8
sdp_get_ip_ver(struct sdp_hh
*hh
)
252 return hh
->ip_version
>> 4;
255 static inline void sdp_set_ip_ver(struct sdp_hh
*hh
, u8 ip_ver
)
257 hh
->ip_version
= (ip_ver
<< 4) | (hh
->ip_version
& 0xF);
260 static inline int cma_is_ud_ps(enum rdma_port_space ps
)
262 return (ps
== RDMA_PS_UDP
|| ps
== RDMA_PS_IPOIB
);
265 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
266 struct cma_device
*cma_dev
)
268 atomic_inc(&cma_dev
->refcount
);
269 id_priv
->cma_dev
= cma_dev
;
270 id_priv
->id
.device
= cma_dev
->device
;
271 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
274 static inline void cma_deref_dev(struct cma_device
*cma_dev
)
276 if (atomic_dec_and_test(&cma_dev
->refcount
))
277 complete(&cma_dev
->comp
);
280 static void cma_detach_from_dev(struct rdma_id_private
*id_priv
)
282 list_del(&id_priv
->list
);
283 cma_deref_dev(id_priv
->cma_dev
);
284 id_priv
->cma_dev
= NULL
;
287 static int cma_set_qkey(struct ib_device
*device
, u8 port_num
,
288 enum rdma_port_space ps
,
289 struct rdma_dev_addr
*dev_addr
, u32
*qkey
)
291 struct ib_sa_mcmember_rec rec
;
296 *qkey
= RDMA_UDP_QKEY
;
299 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
300 ret
= ib_sa_get_mcmember_rec(device
, port_num
, &rec
.mgid
, &rec
);
301 *qkey
= be32_to_cpu(rec
.qkey
);
309 static int cma_acquire_dev(struct rdma_id_private
*id_priv
)
311 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
312 struct cma_device
*cma_dev
;
316 switch (rdma_node_get_transport(dev_addr
->dev_type
)) {
317 case RDMA_TRANSPORT_IB
:
318 ib_addr_get_sgid(dev_addr
, &gid
);
320 case RDMA_TRANSPORT_IWARP
:
321 iw_addr_get_sgid(dev_addr
, &gid
);
327 list_for_each_entry(cma_dev
, &dev_list
, list
) {
328 ret
= ib_find_cached_gid(cma_dev
->device
, &gid
,
329 &id_priv
->id
.port_num
, NULL
);
331 ret
= cma_set_qkey(cma_dev
->device
,
332 id_priv
->id
.port_num
,
333 id_priv
->id
.ps
, dev_addr
,
336 cma_attach_to_dev(id_priv
, cma_dev
);
343 static void cma_deref_id(struct rdma_id_private
*id_priv
)
345 if (atomic_dec_and_test(&id_priv
->refcount
))
346 complete(&id_priv
->comp
);
349 static int cma_disable_remove(struct rdma_id_private
*id_priv
,
350 enum cma_state state
)
355 spin_lock_irqsave(&id_priv
->lock
, flags
);
356 if (id_priv
->state
== state
) {
357 atomic_inc(&id_priv
->dev_remove
);
361 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
365 static void cma_enable_remove(struct rdma_id_private
*id_priv
)
367 if (atomic_dec_and_test(&id_priv
->dev_remove
))
368 wake_up(&id_priv
->wait_remove
);
371 static int cma_has_cm_dev(struct rdma_id_private
*id_priv
)
373 return (id_priv
->id
.device
&& id_priv
->cm_id
.ib
);
376 struct rdma_cm_id
*rdma_create_id(rdma_cm_event_handler event_handler
,
377 void *context
, enum rdma_port_space ps
)
379 struct rdma_id_private
*id_priv
;
381 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
383 return ERR_PTR(-ENOMEM
);
385 id_priv
->state
= CMA_IDLE
;
386 id_priv
->id
.context
= context
;
387 id_priv
->id
.event_handler
= event_handler
;
389 spin_lock_init(&id_priv
->lock
);
390 init_completion(&id_priv
->comp
);
391 atomic_set(&id_priv
->refcount
, 1);
392 init_waitqueue_head(&id_priv
->wait_remove
);
393 atomic_set(&id_priv
->dev_remove
, 0);
394 INIT_LIST_HEAD(&id_priv
->listen_list
);
395 INIT_LIST_HEAD(&id_priv
->mc_list
);
396 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
400 EXPORT_SYMBOL(rdma_create_id
);
402 static int cma_init_ud_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
404 struct ib_qp_attr qp_attr
;
405 int qp_attr_mask
, ret
;
407 qp_attr
.qp_state
= IB_QPS_INIT
;
408 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
412 ret
= ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
416 qp_attr
.qp_state
= IB_QPS_RTR
;
417 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
);
421 qp_attr
.qp_state
= IB_QPS_RTS
;
423 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
428 static int cma_init_conn_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
430 struct ib_qp_attr qp_attr
;
431 int qp_attr_mask
, ret
;
433 qp_attr
.qp_state
= IB_QPS_INIT
;
434 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
438 return ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
441 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
442 struct ib_qp_init_attr
*qp_init_attr
)
444 struct rdma_id_private
*id_priv
;
448 id_priv
= container_of(id
, struct rdma_id_private
, id
);
449 if (id
->device
!= pd
->device
)
452 qp
= ib_create_qp(pd
, qp_init_attr
);
456 if (cma_is_ud_ps(id_priv
->id
.ps
))
457 ret
= cma_init_ud_qp(id_priv
, qp
);
459 ret
= cma_init_conn_qp(id_priv
, qp
);
464 id_priv
->qp_num
= qp
->qp_num
;
465 id_priv
->srq
= (qp
->srq
!= NULL
);
471 EXPORT_SYMBOL(rdma_create_qp
);
473 void rdma_destroy_qp(struct rdma_cm_id
*id
)
475 ib_destroy_qp(id
->qp
);
477 EXPORT_SYMBOL(rdma_destroy_qp
);
479 static int cma_modify_qp_rtr(struct rdma_cm_id
*id
)
481 struct ib_qp_attr qp_attr
;
482 int qp_attr_mask
, ret
;
487 /* Need to update QP attributes from default values. */
488 qp_attr
.qp_state
= IB_QPS_INIT
;
489 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
493 ret
= ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
497 qp_attr
.qp_state
= IB_QPS_RTR
;
498 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
502 return ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
505 static int cma_modify_qp_rts(struct rdma_cm_id
*id
)
507 struct ib_qp_attr qp_attr
;
508 int qp_attr_mask
, ret
;
513 qp_attr
.qp_state
= IB_QPS_RTS
;
514 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
518 return ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
521 static int cma_modify_qp_err(struct rdma_cm_id
*id
)
523 struct ib_qp_attr qp_attr
;
528 qp_attr
.qp_state
= IB_QPS_ERR
;
529 return ib_modify_qp(id
->qp
, &qp_attr
, IB_QP_STATE
);
532 static int cma_ib_init_qp_attr(struct rdma_id_private
*id_priv
,
533 struct ib_qp_attr
*qp_attr
, int *qp_attr_mask
)
535 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
538 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
539 ib_addr_get_pkey(dev_addr
),
540 &qp_attr
->pkey_index
);
544 qp_attr
->port_num
= id_priv
->id
.port_num
;
545 *qp_attr_mask
= IB_QP_STATE
| IB_QP_PKEY_INDEX
| IB_QP_PORT
;
547 if (cma_is_ud_ps(id_priv
->id
.ps
)) {
548 qp_attr
->qkey
= id_priv
->qkey
;
549 *qp_attr_mask
|= IB_QP_QKEY
;
551 qp_attr
->qp_access_flags
= 0;
552 *qp_attr_mask
|= IB_QP_ACCESS_FLAGS
;
557 int rdma_init_qp_attr(struct rdma_cm_id
*id
, struct ib_qp_attr
*qp_attr
,
560 struct rdma_id_private
*id_priv
;
563 id_priv
= container_of(id
, struct rdma_id_private
, id
);
564 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
565 case RDMA_TRANSPORT_IB
:
566 if (!id_priv
->cm_id
.ib
|| cma_is_ud_ps(id_priv
->id
.ps
))
567 ret
= cma_ib_init_qp_attr(id_priv
, qp_attr
, qp_attr_mask
);
569 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, qp_attr
,
571 if (qp_attr
->qp_state
== IB_QPS_RTR
)
572 qp_attr
->rq_psn
= id_priv
->seq_num
;
574 case RDMA_TRANSPORT_IWARP
:
575 if (!id_priv
->cm_id
.iw
) {
576 qp_attr
->qp_access_flags
= 0;
577 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
;
579 ret
= iw_cm_init_qp_attr(id_priv
->cm_id
.iw
, qp_attr
,
589 EXPORT_SYMBOL(rdma_init_qp_attr
);
591 static inline int cma_zero_addr(struct sockaddr
*addr
)
593 struct in6_addr
*ip6
;
595 if (addr
->sa_family
== AF_INET
)
596 return ZERONET(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
598 ip6
= &((struct sockaddr_in6
*) addr
)->sin6_addr
;
599 return (ip6
->s6_addr32
[0] | ip6
->s6_addr32
[1] |
600 ip6
->s6_addr32
[2] | ip6
->s6_addr32
[3]) == 0;
604 static inline int cma_loopback_addr(struct sockaddr
*addr
)
606 return LOOPBACK(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
609 static inline int cma_any_addr(struct sockaddr
*addr
)
611 return cma_zero_addr(addr
) || cma_loopback_addr(addr
);
614 static inline __be16
cma_port(struct sockaddr
*addr
)
616 if (addr
->sa_family
== AF_INET
)
617 return ((struct sockaddr_in
*) addr
)->sin_port
;
619 return ((struct sockaddr_in6
*) addr
)->sin6_port
;
622 static inline int cma_any_port(struct sockaddr
*addr
)
624 return !cma_port(addr
);
627 static int cma_get_net_info(void *hdr
, enum rdma_port_space ps
,
628 u8
*ip_ver
, __u16
*port
,
629 union cma_ip_addr
**src
, union cma_ip_addr
**dst
)
633 if (sdp_get_majv(((struct sdp_hh
*) hdr
)->sdp_version
) !=
637 *ip_ver
= sdp_get_ip_ver(hdr
);
638 *port
= ((struct sdp_hh
*) hdr
)->port
;
639 *src
= &((struct sdp_hh
*) hdr
)->src_addr
;
640 *dst
= &((struct sdp_hh
*) hdr
)->dst_addr
;
643 if (((struct cma_hdr
*) hdr
)->cma_version
!= CMA_VERSION
)
646 *ip_ver
= cma_get_ip_ver(hdr
);
647 *port
= ((struct cma_hdr
*) hdr
)->port
;
648 *src
= &((struct cma_hdr
*) hdr
)->src_addr
;
649 *dst
= &((struct cma_hdr
*) hdr
)->dst_addr
;
653 if (*ip_ver
!= 4 && *ip_ver
!= 6)
658 static void cma_save_net_info(struct rdma_addr
*addr
,
659 struct rdma_addr
*listen_addr
,
660 u8 ip_ver
, __u16 port
,
661 union cma_ip_addr
*src
, union cma_ip_addr
*dst
)
663 struct sockaddr_in
*listen4
, *ip4
;
664 struct sockaddr_in6
*listen6
, *ip6
;
668 listen4
= (struct sockaddr_in
*) &listen_addr
->src_addr
;
669 ip4
= (struct sockaddr_in
*) &addr
->src_addr
;
670 ip4
->sin_family
= listen4
->sin_family
;
671 ip4
->sin_addr
.s_addr
= dst
->ip4
.addr
;
672 ip4
->sin_port
= listen4
->sin_port
;
674 ip4
= (struct sockaddr_in
*) &addr
->dst_addr
;
675 ip4
->sin_family
= listen4
->sin_family
;
676 ip4
->sin_addr
.s_addr
= src
->ip4
.addr
;
677 ip4
->sin_port
= port
;
680 listen6
= (struct sockaddr_in6
*) &listen_addr
->src_addr
;
681 ip6
= (struct sockaddr_in6
*) &addr
->src_addr
;
682 ip6
->sin6_family
= listen6
->sin6_family
;
683 ip6
->sin6_addr
= dst
->ip6
;
684 ip6
->sin6_port
= listen6
->sin6_port
;
686 ip6
= (struct sockaddr_in6
*) &addr
->dst_addr
;
687 ip6
->sin6_family
= listen6
->sin6_family
;
688 ip6
->sin6_addr
= src
->ip6
;
689 ip6
->sin6_port
= port
;
696 static inline int cma_user_data_offset(enum rdma_port_space ps
)
702 return sizeof(struct cma_hdr
);
706 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
708 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
709 case RDMA_TRANSPORT_IB
:
711 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
718 static inline int cma_internal_listen(struct rdma_id_private
*id_priv
)
720 return (id_priv
->state
== CMA_LISTEN
) && id_priv
->cma_dev
&&
721 cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
);
724 static void cma_destroy_listen(struct rdma_id_private
*id_priv
)
726 cma_exch(id_priv
, CMA_DESTROYING
);
728 if (id_priv
->cma_dev
) {
729 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
730 case RDMA_TRANSPORT_IB
:
731 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
732 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
734 case RDMA_TRANSPORT_IWARP
:
735 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
736 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
741 cma_detach_from_dev(id_priv
);
743 list_del(&id_priv
->listen_list
);
745 cma_deref_id(id_priv
);
746 wait_for_completion(&id_priv
->comp
);
751 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
753 struct rdma_id_private
*dev_id_priv
;
756 list_del(&id_priv
->list
);
758 while (!list_empty(&id_priv
->listen_list
)) {
759 dev_id_priv
= list_entry(id_priv
->listen_list
.next
,
760 struct rdma_id_private
, listen_list
);
761 cma_destroy_listen(dev_id_priv
);
766 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
767 enum cma_state state
)
771 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
773 case CMA_ROUTE_QUERY
:
774 cma_cancel_route(id_priv
);
777 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
) &&
779 cma_cancel_listens(id_priv
);
786 static void cma_release_port(struct rdma_id_private
*id_priv
)
788 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
794 hlist_del(&id_priv
->node
);
795 if (hlist_empty(&bind_list
->owners
)) {
796 idr_remove(bind_list
->ps
, bind_list
->port
);
802 static void cma_leave_mc_groups(struct rdma_id_private
*id_priv
)
804 struct cma_multicast
*mc
;
806 while (!list_empty(&id_priv
->mc_list
)) {
807 mc
= container_of(id_priv
->mc_list
.next
,
808 struct cma_multicast
, list
);
810 ib_sa_free_multicast(mc
->multicast
.ib
);
815 void rdma_destroy_id(struct rdma_cm_id
*id
)
817 struct rdma_id_private
*id_priv
;
818 enum cma_state state
;
820 id_priv
= container_of(id
, struct rdma_id_private
, id
);
821 state
= cma_exch(id_priv
, CMA_DESTROYING
);
822 cma_cancel_operation(id_priv
, state
);
825 if (id_priv
->cma_dev
) {
827 switch (rdma_node_get_transport(id
->device
->node_type
)) {
828 case RDMA_TRANSPORT_IB
:
829 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
830 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
832 case RDMA_TRANSPORT_IWARP
:
833 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
834 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
839 cma_leave_mc_groups(id_priv
);
841 cma_detach_from_dev(id_priv
);
845 cma_release_port(id_priv
);
846 cma_deref_id(id_priv
);
847 wait_for_completion(&id_priv
->comp
);
849 kfree(id_priv
->id
.route
.path_rec
);
852 EXPORT_SYMBOL(rdma_destroy_id
);
854 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
858 ret
= cma_modify_qp_rtr(&id_priv
->id
);
862 ret
= cma_modify_qp_rts(&id_priv
->id
);
866 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
872 cma_modify_qp_err(&id_priv
->id
);
873 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
878 static int cma_verify_rep(struct rdma_id_private
*id_priv
, void *data
)
880 if (id_priv
->id
.ps
== RDMA_PS_SDP
&&
881 sdp_get_majv(((struct sdp_hah
*) data
)->sdp_version
) !=
888 static void cma_set_rep_event_data(struct rdma_cm_event
*event
,
889 struct ib_cm_rep_event_param
*rep_data
,
892 event
->param
.conn
.private_data
= private_data
;
893 event
->param
.conn
.private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
894 event
->param
.conn
.responder_resources
= rep_data
->responder_resources
;
895 event
->param
.conn
.initiator_depth
= rep_data
->initiator_depth
;
896 event
->param
.conn
.flow_control
= rep_data
->flow_control
;
897 event
->param
.conn
.rnr_retry_count
= rep_data
->rnr_retry_count
;
898 event
->param
.conn
.srq
= rep_data
->srq
;
899 event
->param
.conn
.qp_num
= rep_data
->remote_qpn
;
902 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
904 struct rdma_id_private
*id_priv
= cm_id
->context
;
905 struct rdma_cm_event event
;
908 if (cma_disable_remove(id_priv
, CMA_CONNECT
))
911 memset(&event
, 0, sizeof event
);
912 switch (ib_event
->event
) {
913 case IB_CM_REQ_ERROR
:
914 case IB_CM_REP_ERROR
:
915 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
916 event
.status
= -ETIMEDOUT
;
918 case IB_CM_REP_RECEIVED
:
919 event
.status
= cma_verify_rep(id_priv
, ib_event
->private_data
);
921 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
922 else if (id_priv
->id
.qp
&& id_priv
->id
.ps
!= RDMA_PS_SDP
) {
923 event
.status
= cma_rep_recv(id_priv
);
924 event
.event
= event
.status
? RDMA_CM_EVENT_CONNECT_ERROR
:
925 RDMA_CM_EVENT_ESTABLISHED
;
927 event
.event
= RDMA_CM_EVENT_CONNECT_RESPONSE
;
928 cma_set_rep_event_data(&event
, &ib_event
->param
.rep_rcvd
,
929 ib_event
->private_data
);
931 case IB_CM_RTU_RECEIVED
:
932 case IB_CM_USER_ESTABLISHED
:
933 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
935 case IB_CM_DREQ_ERROR
:
936 event
.status
= -ETIMEDOUT
; /* fall through */
937 case IB_CM_DREQ_RECEIVED
:
938 case IB_CM_DREP_RECEIVED
:
939 if (!cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_DISCONNECT
))
941 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
943 case IB_CM_TIMEWAIT_EXIT
:
944 case IB_CM_MRA_RECEIVED
:
947 case IB_CM_REJ_RECEIVED
:
948 cma_modify_qp_err(&id_priv
->id
);
949 event
.status
= ib_event
->param
.rej_rcvd
.reason
;
950 event
.event
= RDMA_CM_EVENT_REJECTED
;
951 event
.param
.conn
.private_data
= ib_event
->private_data
;
952 event
.param
.conn
.private_data_len
= IB_CM_REJ_PRIVATE_DATA_SIZE
;
955 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
960 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
962 /* Destroy the CM ID by returning a non-zero value. */
963 id_priv
->cm_id
.ib
= NULL
;
964 cma_exch(id_priv
, CMA_DESTROYING
);
965 cma_enable_remove(id_priv
);
966 rdma_destroy_id(&id_priv
->id
);
970 cma_enable_remove(id_priv
);
974 static struct rdma_id_private
*cma_new_conn_id(struct rdma_cm_id
*listen_id
,
975 struct ib_cm_event
*ib_event
)
977 struct rdma_id_private
*id_priv
;
978 struct rdma_cm_id
*id
;
979 struct rdma_route
*rt
;
980 union cma_ip_addr
*src
, *dst
;
984 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
985 &ip_ver
, &port
, &src
, &dst
))
988 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
993 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
994 ip_ver
, port
, src
, dst
);
997 rt
->num_paths
= ib_event
->param
.req_rcvd
.alternate_path
? 2 : 1;
998 rt
->path_rec
= kmalloc(sizeof *rt
->path_rec
* rt
->num_paths
,
1003 rt
->path_rec
[0] = *ib_event
->param
.req_rcvd
.primary_path
;
1004 if (rt
->num_paths
== 2)
1005 rt
->path_rec
[1] = *ib_event
->param
.req_rcvd
.alternate_path
;
1007 ib_addr_set_sgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].sgid
);
1008 ib_addr_set_dgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].dgid
);
1009 ib_addr_set_pkey(&rt
->addr
.dev_addr
, be16_to_cpu(rt
->path_rec
[0].pkey
));
1010 rt
->addr
.dev_addr
.dev_type
= RDMA_NODE_IB_CA
;
1012 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1013 id_priv
->state
= CMA_CONNECT
;
1017 rdma_destroy_id(id
);
1022 static struct rdma_id_private
*cma_new_udp_id(struct rdma_cm_id
*listen_id
,
1023 struct ib_cm_event
*ib_event
)
1025 struct rdma_id_private
*id_priv
;
1026 struct rdma_cm_id
*id
;
1027 union cma_ip_addr
*src
, *dst
;
1032 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
1038 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
1039 &ip_ver
, &port
, &src
, &dst
))
1042 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
1043 ip_ver
, port
, src
, dst
);
1045 ret
= rdma_translate_ip(&id
->route
.addr
.src_addr
,
1046 &id
->route
.addr
.dev_addr
);
1050 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1051 id_priv
->state
= CMA_CONNECT
;
1054 rdma_destroy_id(id
);
1058 static void cma_set_req_event_data(struct rdma_cm_event
*event
,
1059 struct ib_cm_req_event_param
*req_data
,
1060 void *private_data
, int offset
)
1062 event
->param
.conn
.private_data
= private_data
+ offset
;
1063 event
->param
.conn
.private_data_len
= IB_CM_REQ_PRIVATE_DATA_SIZE
- offset
;
1064 event
->param
.conn
.responder_resources
= req_data
->responder_resources
;
1065 event
->param
.conn
.initiator_depth
= req_data
->initiator_depth
;
1066 event
->param
.conn
.flow_control
= req_data
->flow_control
;
1067 event
->param
.conn
.retry_count
= req_data
->retry_count
;
1068 event
->param
.conn
.rnr_retry_count
= req_data
->rnr_retry_count
;
1069 event
->param
.conn
.srq
= req_data
->srq
;
1070 event
->param
.conn
.qp_num
= req_data
->remote_qpn
;
1073 static int cma_req_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
1075 struct rdma_id_private
*listen_id
, *conn_id
;
1076 struct rdma_cm_event event
;
1079 listen_id
= cm_id
->context
;
1080 if (cma_disable_remove(listen_id
, CMA_LISTEN
))
1081 return -ECONNABORTED
;
1083 memset(&event
, 0, sizeof event
);
1084 offset
= cma_user_data_offset(listen_id
->id
.ps
);
1085 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1086 if (cma_is_ud_ps(listen_id
->id
.ps
)) {
1087 conn_id
= cma_new_udp_id(&listen_id
->id
, ib_event
);
1088 event
.param
.ud
.private_data
= ib_event
->private_data
+ offset
;
1089 event
.param
.ud
.private_data_len
=
1090 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
- offset
;
1092 conn_id
= cma_new_conn_id(&listen_id
->id
, ib_event
);
1093 cma_set_req_event_data(&event
, &ib_event
->param
.req_rcvd
,
1094 ib_event
->private_data
, offset
);
1101 atomic_inc(&conn_id
->dev_remove
);
1103 ret
= cma_acquire_dev(conn_id
);
1104 mutex_unlock(&lock
);
1106 goto release_conn_id
;
1108 conn_id
->cm_id
.ib
= cm_id
;
1109 cm_id
->context
= conn_id
;
1110 cm_id
->cm_handler
= cma_ib_handler
;
1112 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1116 /* Destroy the CM ID by returning a non-zero value. */
1117 conn_id
->cm_id
.ib
= NULL
;
1120 cma_exch(conn_id
, CMA_DESTROYING
);
1121 cma_enable_remove(conn_id
);
1122 rdma_destroy_id(&conn_id
->id
);
1125 cma_enable_remove(listen_id
);
1129 static __be64
cma_get_service_id(enum rdma_port_space ps
, struct sockaddr
*addr
)
1131 return cpu_to_be64(((u64
)ps
<< 16) + be16_to_cpu(cma_port(addr
)));
1134 static void cma_set_compare_data(enum rdma_port_space ps
, struct sockaddr
*addr
,
1135 struct ib_cm_compare_data
*compare
)
1137 struct cma_hdr
*cma_data
, *cma_mask
;
1138 struct sdp_hh
*sdp_data
, *sdp_mask
;
1140 struct in6_addr ip6_addr
;
1142 memset(compare
, 0, sizeof *compare
);
1143 cma_data
= (void *) compare
->data
;
1144 cma_mask
= (void *) compare
->mask
;
1145 sdp_data
= (void *) compare
->data
;
1146 sdp_mask
= (void *) compare
->mask
;
1148 switch (addr
->sa_family
) {
1150 ip4_addr
= ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
;
1151 if (ps
== RDMA_PS_SDP
) {
1152 sdp_set_ip_ver(sdp_data
, 4);
1153 sdp_set_ip_ver(sdp_mask
, 0xF);
1154 sdp_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1155 sdp_mask
->dst_addr
.ip4
.addr
= ~0;
1157 cma_set_ip_ver(cma_data
, 4);
1158 cma_set_ip_ver(cma_mask
, 0xF);
1159 cma_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1160 cma_mask
->dst_addr
.ip4
.addr
= ~0;
1164 ip6_addr
= ((struct sockaddr_in6
*) addr
)->sin6_addr
;
1165 if (ps
== RDMA_PS_SDP
) {
1166 sdp_set_ip_ver(sdp_data
, 6);
1167 sdp_set_ip_ver(sdp_mask
, 0xF);
1168 sdp_data
->dst_addr
.ip6
= ip6_addr
;
1169 memset(&sdp_mask
->dst_addr
.ip6
, 0xFF,
1170 sizeof sdp_mask
->dst_addr
.ip6
);
1172 cma_set_ip_ver(cma_data
, 6);
1173 cma_set_ip_ver(cma_mask
, 0xF);
1174 cma_data
->dst_addr
.ip6
= ip6_addr
;
1175 memset(&cma_mask
->dst_addr
.ip6
, 0xFF,
1176 sizeof cma_mask
->dst_addr
.ip6
);
1184 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1186 struct rdma_id_private
*id_priv
= iw_id
->context
;
1187 struct rdma_cm_event event
;
1188 struct sockaddr_in
*sin
;
1191 if (cma_disable_remove(id_priv
, CMA_CONNECT
))
1194 memset(&event
, 0, sizeof event
);
1195 switch (iw_event
->event
) {
1196 case IW_CM_EVENT_CLOSE
:
1197 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
1199 case IW_CM_EVENT_CONNECT_REPLY
:
1200 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1201 *sin
= iw_event
->local_addr
;
1202 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1203 *sin
= iw_event
->remote_addr
;
1204 switch (iw_event
->status
) {
1206 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1210 event
.event
= RDMA_CM_EVENT_REJECTED
;
1213 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1216 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
1220 case IW_CM_EVENT_ESTABLISHED
:
1221 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1227 event
.status
= iw_event
->status
;
1228 event
.param
.conn
.private_data
= iw_event
->private_data
;
1229 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1230 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
1232 /* Destroy the CM ID by returning a non-zero value. */
1233 id_priv
->cm_id
.iw
= NULL
;
1234 cma_exch(id_priv
, CMA_DESTROYING
);
1235 cma_enable_remove(id_priv
);
1236 rdma_destroy_id(&id_priv
->id
);
1240 cma_enable_remove(id_priv
);
1244 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
1245 struct iw_cm_event
*iw_event
)
1247 struct rdma_cm_id
*new_cm_id
;
1248 struct rdma_id_private
*listen_id
, *conn_id
;
1249 struct sockaddr_in
*sin
;
1250 struct net_device
*dev
= NULL
;
1251 struct rdma_cm_event event
;
1254 listen_id
= cm_id
->context
;
1255 if (cma_disable_remove(listen_id
, CMA_LISTEN
))
1256 return -ECONNABORTED
;
1258 /* Create a new RDMA id for the new IW CM ID */
1259 new_cm_id
= rdma_create_id(listen_id
->id
.event_handler
,
1260 listen_id
->id
.context
,
1266 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
1267 atomic_inc(&conn_id
->dev_remove
);
1268 conn_id
->state
= CMA_CONNECT
;
1270 dev
= ip_dev_find(iw_event
->local_addr
.sin_addr
.s_addr
);
1272 ret
= -EADDRNOTAVAIL
;
1273 cma_enable_remove(conn_id
);
1274 rdma_destroy_id(new_cm_id
);
1277 ret
= rdma_copy_addr(&conn_id
->id
.route
.addr
.dev_addr
, dev
, NULL
);
1279 cma_enable_remove(conn_id
);
1280 rdma_destroy_id(new_cm_id
);
1285 ret
= cma_acquire_dev(conn_id
);
1286 mutex_unlock(&lock
);
1288 cma_enable_remove(conn_id
);
1289 rdma_destroy_id(new_cm_id
);
1293 conn_id
->cm_id
.iw
= cm_id
;
1294 cm_id
->context
= conn_id
;
1295 cm_id
->cm_handler
= cma_iw_handler
;
1297 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.src_addr
;
1298 *sin
= iw_event
->local_addr
;
1299 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.dst_addr
;
1300 *sin
= iw_event
->remote_addr
;
1302 memset(&event
, 0, sizeof event
);
1303 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1304 event
.param
.conn
.private_data
= iw_event
->private_data
;
1305 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1306 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1308 /* User wants to destroy the CM ID */
1309 conn_id
->cm_id
.iw
= NULL
;
1310 cma_exch(conn_id
, CMA_DESTROYING
);
1311 cma_enable_remove(conn_id
);
1312 rdma_destroy_id(&conn_id
->id
);
1318 cma_enable_remove(listen_id
);
1322 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
1324 struct ib_cm_compare_data compare_data
;
1325 struct sockaddr
*addr
;
1329 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_req_handler
,
1331 if (IS_ERR(id_priv
->cm_id
.ib
))
1332 return PTR_ERR(id_priv
->cm_id
.ib
);
1334 addr
= &id_priv
->id
.route
.addr
.src_addr
;
1335 svc_id
= cma_get_service_id(id_priv
->id
.ps
, addr
);
1336 if (cma_any_addr(addr
))
1337 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, NULL
);
1339 cma_set_compare_data(id_priv
->id
.ps
, addr
, &compare_data
);
1340 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, &compare_data
);
1344 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1345 id_priv
->cm_id
.ib
= NULL
;
1351 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
1354 struct sockaddr_in
*sin
;
1356 id_priv
->cm_id
.iw
= iw_create_cm_id(id_priv
->id
.device
,
1357 iw_conn_req_handler
,
1359 if (IS_ERR(id_priv
->cm_id
.iw
))
1360 return PTR_ERR(id_priv
->cm_id
.iw
);
1362 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1363 id_priv
->cm_id
.iw
->local_addr
= *sin
;
1365 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
1368 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1369 id_priv
->cm_id
.iw
= NULL
;
1375 static int cma_listen_handler(struct rdma_cm_id
*id
,
1376 struct rdma_cm_event
*event
)
1378 struct rdma_id_private
*id_priv
= id
->context
;
1380 id
->context
= id_priv
->id
.context
;
1381 id
->event_handler
= id_priv
->id
.event_handler
;
1382 return id_priv
->id
.event_handler(id
, event
);
1385 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
1386 struct cma_device
*cma_dev
)
1388 struct rdma_id_private
*dev_id_priv
;
1389 struct rdma_cm_id
*id
;
1392 id
= rdma_create_id(cma_listen_handler
, id_priv
, id_priv
->id
.ps
);
1396 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
1398 dev_id_priv
->state
= CMA_ADDR_BOUND
;
1399 memcpy(&id
->route
.addr
.src_addr
, &id_priv
->id
.route
.addr
.src_addr
,
1400 ip_addr_size(&id_priv
->id
.route
.addr
.src_addr
));
1402 cma_attach_to_dev(dev_id_priv
, cma_dev
);
1403 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
1405 ret
= rdma_listen(id
, id_priv
->backlog
);
1411 cma_destroy_listen(dev_id_priv
);
1414 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
1416 struct cma_device
*cma_dev
;
1419 list_add_tail(&id_priv
->list
, &listen_any_list
);
1420 list_for_each_entry(cma_dev
, &dev_list
, list
)
1421 cma_listen_on_dev(id_priv
, cma_dev
);
1422 mutex_unlock(&lock
);
1425 static int cma_bind_any(struct rdma_cm_id
*id
, sa_family_t af
)
1427 struct sockaddr_in addr_in
;
1429 memset(&addr_in
, 0, sizeof addr_in
);
1430 addr_in
.sin_family
= af
;
1431 return rdma_bind_addr(id
, (struct sockaddr
*) &addr_in
);
1434 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
1436 struct rdma_id_private
*id_priv
;
1439 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1440 if (id_priv
->state
== CMA_IDLE
) {
1441 ret
= cma_bind_any(id
, AF_INET
);
1446 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_LISTEN
))
1449 id_priv
->backlog
= backlog
;
1451 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1452 case RDMA_TRANSPORT_IB
:
1453 ret
= cma_ib_listen(id_priv
);
1457 case RDMA_TRANSPORT_IWARP
:
1458 ret
= cma_iw_listen(id_priv
, backlog
);
1467 cma_listen_on_all(id_priv
);
1471 id_priv
->backlog
= 0;
1472 cma_comp_exch(id_priv
, CMA_LISTEN
, CMA_ADDR_BOUND
);
1475 EXPORT_SYMBOL(rdma_listen
);
1477 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
1480 struct cma_work
*work
= context
;
1481 struct rdma_route
*route
;
1483 route
= &work
->id
->id
.route
;
1486 route
->num_paths
= 1;
1487 *route
->path_rec
= *path_rec
;
1489 work
->old_state
= CMA_ROUTE_QUERY
;
1490 work
->new_state
= CMA_ADDR_RESOLVED
;
1491 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
1492 work
->event
.status
= status
;
1495 queue_work(cma_wq
, &work
->work
);
1498 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
1499 struct cma_work
*work
)
1501 struct rdma_dev_addr
*addr
= &id_priv
->id
.route
.addr
.dev_addr
;
1502 struct ib_sa_path_rec path_rec
;
1504 memset(&path_rec
, 0, sizeof path_rec
);
1505 ib_addr_get_sgid(addr
, &path_rec
.sgid
);
1506 ib_addr_get_dgid(addr
, &path_rec
.dgid
);
1507 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(addr
));
1508 path_rec
.numb_path
= 1;
1509 path_rec
.reversible
= 1;
1511 id_priv
->query_id
= ib_sa_path_rec_get(&sa_client
, id_priv
->id
.device
,
1512 id_priv
->id
.port_num
, &path_rec
,
1513 IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
1514 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
|
1515 IB_SA_PATH_REC_REVERSIBLE
,
1516 timeout_ms
, GFP_KERNEL
,
1517 cma_query_handler
, work
, &id_priv
->query
);
1519 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
1522 static void cma_work_handler(struct work_struct
*_work
)
1524 struct cma_work
*work
= container_of(_work
, struct cma_work
, work
);
1525 struct rdma_id_private
*id_priv
= work
->id
;
1528 atomic_inc(&id_priv
->dev_remove
);
1529 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
1532 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
1533 cma_exch(id_priv
, CMA_DESTROYING
);
1537 cma_enable_remove(id_priv
);
1538 cma_deref_id(id_priv
);
1540 rdma_destroy_id(&id_priv
->id
);
1544 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1546 struct rdma_route
*route
= &id_priv
->id
.route
;
1547 struct cma_work
*work
;
1550 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1555 INIT_WORK(&work
->work
, cma_work_handler
);
1556 work
->old_state
= CMA_ROUTE_QUERY
;
1557 work
->new_state
= CMA_ROUTE_RESOLVED
;
1558 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1560 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
1561 if (!route
->path_rec
) {
1566 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
1572 kfree(route
->path_rec
);
1573 route
->path_rec
= NULL
;
1579 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
1580 struct ib_sa_path_rec
*path_rec
, int num_paths
)
1582 struct rdma_id_private
*id_priv
;
1585 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1586 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_RESOLVED
))
1589 id
->route
.path_rec
= kmalloc(sizeof *path_rec
* num_paths
, GFP_KERNEL
);
1590 if (!id
->route
.path_rec
) {
1595 memcpy(id
->route
.path_rec
, path_rec
, sizeof *path_rec
* num_paths
);
1598 cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_ADDR_RESOLVED
);
1601 EXPORT_SYMBOL(rdma_set_ib_paths
);
1603 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1605 struct cma_work
*work
;
1607 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1612 INIT_WORK(&work
->work
, cma_work_handler
);
1613 work
->old_state
= CMA_ROUTE_QUERY
;
1614 work
->new_state
= CMA_ROUTE_RESOLVED
;
1615 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1616 queue_work(cma_wq
, &work
->work
);
1620 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
1622 struct rdma_id_private
*id_priv
;
1625 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1626 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_QUERY
))
1629 atomic_inc(&id_priv
->refcount
);
1630 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1631 case RDMA_TRANSPORT_IB
:
1632 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
1634 case RDMA_TRANSPORT_IWARP
:
1635 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
1646 cma_comp_exch(id_priv
, CMA_ROUTE_QUERY
, CMA_ADDR_RESOLVED
);
1647 cma_deref_id(id_priv
);
1650 EXPORT_SYMBOL(rdma_resolve_route
);
1652 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
1654 struct cma_device
*cma_dev
;
1655 struct ib_port_attr port_attr
;
1662 if (list_empty(&dev_list
)) {
1666 list_for_each_entry(cma_dev
, &dev_list
, list
)
1667 for (p
= 1; p
<= cma_dev
->device
->phys_port_cnt
; ++p
)
1668 if (!ib_query_port(cma_dev
->device
, p
, &port_attr
) &&
1669 port_attr
.state
== IB_PORT_ACTIVE
)
1673 cma_dev
= list_entry(dev_list
.next
, struct cma_device
, list
);
1676 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
);
1680 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
1684 ib_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1685 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
1686 id_priv
->id
.port_num
= p
;
1687 cma_attach_to_dev(id_priv
, cma_dev
);
1689 mutex_unlock(&lock
);
1693 static void addr_handler(int status
, struct sockaddr
*src_addr
,
1694 struct rdma_dev_addr
*dev_addr
, void *context
)
1696 struct rdma_id_private
*id_priv
= context
;
1697 struct rdma_cm_event event
;
1699 memset(&event
, 0, sizeof event
);
1700 atomic_inc(&id_priv
->dev_remove
);
1703 * Grab mutex to block rdma_destroy_id() from removing the device while
1704 * we're trying to acquire it.
1707 if (!cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_RESOLVED
)) {
1708 mutex_unlock(&lock
);
1712 if (!status
&& !id_priv
->cma_dev
)
1713 status
= cma_acquire_dev(id_priv
);
1714 mutex_unlock(&lock
);
1717 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ADDR_BOUND
))
1719 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
1720 event
.status
= status
;
1722 memcpy(&id_priv
->id
.route
.addr
.src_addr
, src_addr
,
1723 ip_addr_size(src_addr
));
1724 event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1727 if (id_priv
->id
.event_handler(&id_priv
->id
, &event
)) {
1728 cma_exch(id_priv
, CMA_DESTROYING
);
1729 cma_enable_remove(id_priv
);
1730 cma_deref_id(id_priv
);
1731 rdma_destroy_id(&id_priv
->id
);
1735 cma_enable_remove(id_priv
);
1736 cma_deref_id(id_priv
);
1739 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
1741 struct cma_work
*work
;
1742 struct sockaddr_in
*src_in
, *dst_in
;
1746 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1750 if (!id_priv
->cma_dev
) {
1751 ret
= cma_bind_loopback(id_priv
);
1756 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1757 ib_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1759 if (cma_zero_addr(&id_priv
->id
.route
.addr
.src_addr
)) {
1760 src_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.src_addr
;
1761 dst_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.dst_addr
;
1762 src_in
->sin_family
= dst_in
->sin_family
;
1763 src_in
->sin_addr
.s_addr
= dst_in
->sin_addr
.s_addr
;
1767 INIT_WORK(&work
->work
, cma_work_handler
);
1768 work
->old_state
= CMA_ADDR_QUERY
;
1769 work
->new_state
= CMA_ADDR_RESOLVED
;
1770 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1771 queue_work(cma_wq
, &work
->work
);
1778 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1779 struct sockaddr
*dst_addr
)
1781 if (src_addr
&& src_addr
->sa_family
)
1782 return rdma_bind_addr(id
, src_addr
);
1784 return cma_bind_any(id
, dst_addr
->sa_family
);
1787 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1788 struct sockaddr
*dst_addr
, int timeout_ms
)
1790 struct rdma_id_private
*id_priv
;
1793 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1794 if (id_priv
->state
== CMA_IDLE
) {
1795 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
1800 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_ADDR_QUERY
))
1803 atomic_inc(&id_priv
->refcount
);
1804 memcpy(&id
->route
.addr
.dst_addr
, dst_addr
, ip_addr_size(dst_addr
));
1805 if (cma_any_addr(dst_addr
))
1806 ret
= cma_resolve_loopback(id_priv
);
1808 ret
= rdma_resolve_ip(&addr_client
, &id
->route
.addr
.src_addr
,
1809 dst_addr
, &id
->route
.addr
.dev_addr
,
1810 timeout_ms
, addr_handler
, id_priv
);
1816 cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_BOUND
);
1817 cma_deref_id(id_priv
);
1820 EXPORT_SYMBOL(rdma_resolve_addr
);
1822 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
1823 struct rdma_id_private
*id_priv
)
1825 struct sockaddr_in
*sin
;
1827 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1828 sin
->sin_port
= htons(bind_list
->port
);
1829 id_priv
->bind_list
= bind_list
;
1830 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
1833 static int cma_alloc_port(struct idr
*ps
, struct rdma_id_private
*id_priv
,
1834 unsigned short snum
)
1836 struct rdma_bind_list
*bind_list
;
1839 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1844 ret
= idr_get_new_above(ps
, bind_list
, snum
, &port
);
1845 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1851 ret
= -EADDRNOTAVAIL
;
1856 bind_list
->port
= (unsigned short) port
;
1857 cma_bind_port(bind_list
, id_priv
);
1860 idr_remove(ps
, port
);
1866 static int cma_alloc_any_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1868 struct rdma_bind_list
*bind_list
;
1871 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1877 ret
= idr_get_new_above(ps
, bind_list
, next_port
, &port
);
1878 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1883 if (port
> sysctl_local_port_range
[1]) {
1884 if (next_port
!= sysctl_local_port_range
[0]) {
1885 idr_remove(ps
, port
);
1886 next_port
= sysctl_local_port_range
[0];
1889 ret
= -EADDRNOTAVAIL
;
1893 if (port
== sysctl_local_port_range
[1])
1894 next_port
= sysctl_local_port_range
[0];
1896 next_port
= port
+ 1;
1899 bind_list
->port
= (unsigned short) port
;
1900 cma_bind_port(bind_list
, id_priv
);
1903 idr_remove(ps
, port
);
1909 static int cma_use_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1911 struct rdma_id_private
*cur_id
;
1912 struct sockaddr_in
*sin
, *cur_sin
;
1913 struct rdma_bind_list
*bind_list
;
1914 struct hlist_node
*node
;
1915 unsigned short snum
;
1917 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1918 snum
= ntohs(sin
->sin_port
);
1919 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
1922 bind_list
= idr_find(ps
, snum
);
1924 return cma_alloc_port(ps
, id_priv
, snum
);
1927 * We don't support binding to any address if anyone is bound to
1928 * a specific address on the same port.
1930 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
))
1931 return -EADDRNOTAVAIL
;
1933 hlist_for_each_entry(cur_id
, node
, &bind_list
->owners
, node
) {
1934 if (cma_any_addr(&cur_id
->id
.route
.addr
.src_addr
))
1935 return -EADDRNOTAVAIL
;
1937 cur_sin
= (struct sockaddr_in
*) &cur_id
->id
.route
.addr
.src_addr
;
1938 if (sin
->sin_addr
.s_addr
== cur_sin
->sin_addr
.s_addr
)
1942 cma_bind_port(bind_list
, id_priv
);
1946 static int cma_get_port(struct rdma_id_private
*id_priv
)
1951 switch (id_priv
->id
.ps
) {
1965 return -EPROTONOSUPPORT
;
1969 if (cma_any_port(&id_priv
->id
.route
.addr
.src_addr
))
1970 ret
= cma_alloc_any_port(ps
, id_priv
);
1972 ret
= cma_use_port(ps
, id_priv
);
1973 mutex_unlock(&lock
);
1978 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
1980 struct rdma_id_private
*id_priv
;
1983 if (addr
->sa_family
!= AF_INET
)
1984 return -EAFNOSUPPORT
;
1986 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1987 if (!cma_comp_exch(id_priv
, CMA_IDLE
, CMA_ADDR_BOUND
))
1990 if (!cma_any_addr(addr
)) {
1991 ret
= rdma_translate_ip(addr
, &id
->route
.addr
.dev_addr
);
1996 ret
= cma_acquire_dev(id_priv
);
1997 mutex_unlock(&lock
);
2002 memcpy(&id
->route
.addr
.src_addr
, addr
, ip_addr_size(addr
));
2003 ret
= cma_get_port(id_priv
);
2009 if (!cma_any_addr(addr
)) {
2011 cma_detach_from_dev(id_priv
);
2012 mutex_unlock(&lock
);
2015 cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_IDLE
);
2018 EXPORT_SYMBOL(rdma_bind_addr
);
2020 static int cma_format_hdr(void *hdr
, enum rdma_port_space ps
,
2021 struct rdma_route
*route
)
2023 struct sockaddr_in
*src4
, *dst4
;
2024 struct cma_hdr
*cma_hdr
;
2025 struct sdp_hh
*sdp_hdr
;
2027 src4
= (struct sockaddr_in
*) &route
->addr
.src_addr
;
2028 dst4
= (struct sockaddr_in
*) &route
->addr
.dst_addr
;
2033 if (sdp_get_majv(sdp_hdr
->sdp_version
) != SDP_MAJ_VERSION
)
2035 sdp_set_ip_ver(sdp_hdr
, 4);
2036 sdp_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2037 sdp_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2038 sdp_hdr
->port
= src4
->sin_port
;
2042 cma_hdr
->cma_version
= CMA_VERSION
;
2043 cma_set_ip_ver(cma_hdr
, 4);
2044 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2045 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2046 cma_hdr
->port
= src4
->sin_port
;
2052 static int cma_sidr_rep_handler(struct ib_cm_id
*cm_id
,
2053 struct ib_cm_event
*ib_event
)
2055 struct rdma_id_private
*id_priv
= cm_id
->context
;
2056 struct rdma_cm_event event
;
2057 struct ib_cm_sidr_rep_event_param
*rep
= &ib_event
->param
.sidr_rep_rcvd
;
2060 if (cma_disable_remove(id_priv
, CMA_CONNECT
))
2063 memset(&event
, 0, sizeof event
);
2064 switch (ib_event
->event
) {
2065 case IB_CM_SIDR_REQ_ERROR
:
2066 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2067 event
.status
= -ETIMEDOUT
;
2069 case IB_CM_SIDR_REP_RECEIVED
:
2070 event
.param
.ud
.private_data
= ib_event
->private_data
;
2071 event
.param
.ud
.private_data_len
= IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
;
2072 if (rep
->status
!= IB_SIDR_SUCCESS
) {
2073 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2074 event
.status
= ib_event
->param
.sidr_rep_rcvd
.status
;
2077 if (id_priv
->qkey
!= rep
->qkey
) {
2078 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2079 event
.status
= -EINVAL
;
2082 ib_init_ah_from_path(id_priv
->id
.device
, id_priv
->id
.port_num
,
2083 id_priv
->id
.route
.path_rec
,
2084 &event
.param
.ud
.ah_attr
);
2085 event
.param
.ud
.qp_num
= rep
->qpn
;
2086 event
.param
.ud
.qkey
= rep
->qkey
;
2087 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
2091 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
2096 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2098 /* Destroy the CM ID by returning a non-zero value. */
2099 id_priv
->cm_id
.ib
= NULL
;
2100 cma_exch(id_priv
, CMA_DESTROYING
);
2101 cma_enable_remove(id_priv
);
2102 rdma_destroy_id(&id_priv
->id
);
2106 cma_enable_remove(id_priv
);
2110 static int cma_resolve_ib_udp(struct rdma_id_private
*id_priv
,
2111 struct rdma_conn_param
*conn_param
)
2113 struct ib_cm_sidr_req_param req
;
2114 struct rdma_route
*route
;
2117 req
.private_data_len
= sizeof(struct cma_hdr
) +
2118 conn_param
->private_data_len
;
2119 req
.private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2120 if (!req
.private_data
)
2123 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2124 memcpy((void *) req
.private_data
+ sizeof(struct cma_hdr
),
2125 conn_param
->private_data
, conn_param
->private_data_len
);
2127 route
= &id_priv
->id
.route
;
2128 ret
= cma_format_hdr((void *) req
.private_data
, id_priv
->id
.ps
, route
);
2132 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
,
2133 cma_sidr_rep_handler
, id_priv
);
2134 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2135 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2139 req
.path
= route
->path_rec
;
2140 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2141 &route
->addr
.dst_addr
);
2142 req
.timeout_ms
= 1 << (CMA_CM_RESPONSE_TIMEOUT
- 8);
2143 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2145 ret
= ib_send_cm_sidr_req(id_priv
->cm_id
.ib
, &req
);
2147 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2148 id_priv
->cm_id
.ib
= NULL
;
2151 kfree(req
.private_data
);
2155 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
2156 struct rdma_conn_param
*conn_param
)
2158 struct ib_cm_req_param req
;
2159 struct rdma_route
*route
;
2163 memset(&req
, 0, sizeof req
);
2164 offset
= cma_user_data_offset(id_priv
->id
.ps
);
2165 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
2166 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2170 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2171 memcpy(private_data
+ offset
, conn_param
->private_data
,
2172 conn_param
->private_data_len
);
2174 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
,
2176 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2177 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2181 route
= &id_priv
->id
.route
;
2182 ret
= cma_format_hdr(private_data
, id_priv
->id
.ps
, route
);
2185 req
.private_data
= private_data
;
2187 req
.primary_path
= &route
->path_rec
[0];
2188 if (route
->num_paths
== 2)
2189 req
.alternate_path
= &route
->path_rec
[1];
2191 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2192 &route
->addr
.dst_addr
);
2193 req
.qp_num
= id_priv
->qp_num
;
2194 req
.qp_type
= IB_QPT_RC
;
2195 req
.starting_psn
= id_priv
->seq_num
;
2196 req
.responder_resources
= conn_param
->responder_resources
;
2197 req
.initiator_depth
= conn_param
->initiator_depth
;
2198 req
.flow_control
= conn_param
->flow_control
;
2199 req
.retry_count
= conn_param
->retry_count
;
2200 req
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2201 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2202 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2203 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2204 req
.srq
= id_priv
->srq
? 1 : 0;
2206 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
2208 if (ret
&& !IS_ERR(id_priv
->cm_id
.ib
)) {
2209 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2210 id_priv
->cm_id
.ib
= NULL
;
2213 kfree(private_data
);
2217 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
2218 struct rdma_conn_param
*conn_param
)
2220 struct iw_cm_id
*cm_id
;
2221 struct sockaddr_in
* sin
;
2223 struct iw_cm_conn_param iw_param
;
2225 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
2226 if (IS_ERR(cm_id
)) {
2227 ret
= PTR_ERR(cm_id
);
2231 id_priv
->cm_id
.iw
= cm_id
;
2233 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
2234 cm_id
->local_addr
= *sin
;
2236 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
2237 cm_id
->remote_addr
= *sin
;
2239 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2243 iw_param
.ord
= conn_param
->initiator_depth
;
2244 iw_param
.ird
= conn_param
->responder_resources
;
2245 iw_param
.private_data
= conn_param
->private_data
;
2246 iw_param
.private_data_len
= conn_param
->private_data_len
;
2248 iw_param
.qpn
= id_priv
->qp_num
;
2250 iw_param
.qpn
= conn_param
->qp_num
;
2251 ret
= iw_cm_connect(cm_id
, &iw_param
);
2253 if (ret
&& !IS_ERR(cm_id
)) {
2254 iw_destroy_cm_id(cm_id
);
2255 id_priv
->cm_id
.iw
= NULL
;
2260 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2262 struct rdma_id_private
*id_priv
;
2265 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2266 if (!cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_CONNECT
))
2270 id_priv
->qp_num
= conn_param
->qp_num
;
2271 id_priv
->srq
= conn_param
->srq
;
2274 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2275 case RDMA_TRANSPORT_IB
:
2276 if (cma_is_ud_ps(id
->ps
))
2277 ret
= cma_resolve_ib_udp(id_priv
, conn_param
);
2279 ret
= cma_connect_ib(id_priv
, conn_param
);
2281 case RDMA_TRANSPORT_IWARP
:
2282 ret
= cma_connect_iw(id_priv
, conn_param
);
2293 cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_ROUTE_RESOLVED
);
2296 EXPORT_SYMBOL(rdma_connect
);
2298 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
2299 struct rdma_conn_param
*conn_param
)
2301 struct ib_cm_rep_param rep
;
2302 struct ib_qp_attr qp_attr
;
2303 int qp_attr_mask
, ret
;
2305 if (id_priv
->id
.qp
) {
2306 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2310 qp_attr
.qp_state
= IB_QPS_RTS
;
2311 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, &qp_attr
,
2316 qp_attr
.max_rd_atomic
= conn_param
->initiator_depth
;
2317 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
2322 memset(&rep
, 0, sizeof rep
);
2323 rep
.qp_num
= id_priv
->qp_num
;
2324 rep
.starting_psn
= id_priv
->seq_num
;
2325 rep
.private_data
= conn_param
->private_data
;
2326 rep
.private_data_len
= conn_param
->private_data_len
;
2327 rep
.responder_resources
= conn_param
->responder_resources
;
2328 rep
.initiator_depth
= conn_param
->initiator_depth
;
2329 rep
.failover_accepted
= 0;
2330 rep
.flow_control
= conn_param
->flow_control
;
2331 rep
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2332 rep
.srq
= id_priv
->srq
? 1 : 0;
2334 ret
= ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
2339 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
2340 struct rdma_conn_param
*conn_param
)
2342 struct iw_cm_conn_param iw_param
;
2345 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2349 iw_param
.ord
= conn_param
->initiator_depth
;
2350 iw_param
.ird
= conn_param
->responder_resources
;
2351 iw_param
.private_data
= conn_param
->private_data
;
2352 iw_param
.private_data_len
= conn_param
->private_data_len
;
2353 if (id_priv
->id
.qp
) {
2354 iw_param
.qpn
= id_priv
->qp_num
;
2356 iw_param
.qpn
= conn_param
->qp_num
;
2358 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
2361 static int cma_send_sidr_rep(struct rdma_id_private
*id_priv
,
2362 enum ib_cm_sidr_status status
,
2363 const void *private_data
, int private_data_len
)
2365 struct ib_cm_sidr_rep_param rep
;
2367 memset(&rep
, 0, sizeof rep
);
2368 rep
.status
= status
;
2369 if (status
== IB_SIDR_SUCCESS
) {
2370 rep
.qp_num
= id_priv
->qp_num
;
2371 rep
.qkey
= id_priv
->qkey
;
2373 rep
.private_data
= private_data
;
2374 rep
.private_data_len
= private_data_len
;
2376 return ib_send_cm_sidr_rep(id_priv
->cm_id
.ib
, &rep
);
2379 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2381 struct rdma_id_private
*id_priv
;
2384 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2385 if (!cma_comp(id_priv
, CMA_CONNECT
))
2388 if (!id
->qp
&& conn_param
) {
2389 id_priv
->qp_num
= conn_param
->qp_num
;
2390 id_priv
->srq
= conn_param
->srq
;
2393 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2394 case RDMA_TRANSPORT_IB
:
2395 if (cma_is_ud_ps(id
->ps
))
2396 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
2397 conn_param
->private_data
,
2398 conn_param
->private_data_len
);
2399 else if (conn_param
)
2400 ret
= cma_accept_ib(id_priv
, conn_param
);
2402 ret
= cma_rep_recv(id_priv
);
2404 case RDMA_TRANSPORT_IWARP
:
2405 ret
= cma_accept_iw(id_priv
, conn_param
);
2417 cma_modify_qp_err(id
);
2418 rdma_reject(id
, NULL
, 0);
2421 EXPORT_SYMBOL(rdma_accept
);
2423 int rdma_notify(struct rdma_cm_id
*id
, enum ib_event_type event
)
2425 struct rdma_id_private
*id_priv
;
2428 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2429 if (!cma_has_cm_dev(id_priv
))
2432 switch (id
->device
->node_type
) {
2433 case RDMA_NODE_IB_CA
:
2434 ret
= ib_cm_notify(id_priv
->cm_id
.ib
, event
);
2442 EXPORT_SYMBOL(rdma_notify
);
2444 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
2445 u8 private_data_len
)
2447 struct rdma_id_private
*id_priv
;
2450 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2451 if (!cma_has_cm_dev(id_priv
))
2454 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2455 case RDMA_TRANSPORT_IB
:
2456 if (cma_is_ud_ps(id
->ps
))
2457 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_REJECT
,
2458 private_data
, private_data_len
);
2460 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
2461 IB_CM_REJ_CONSUMER_DEFINED
, NULL
,
2462 0, private_data
, private_data_len
);
2464 case RDMA_TRANSPORT_IWARP
:
2465 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
2466 private_data
, private_data_len
);
2474 EXPORT_SYMBOL(rdma_reject
);
2476 int rdma_disconnect(struct rdma_cm_id
*id
)
2478 struct rdma_id_private
*id_priv
;
2481 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2482 if (!cma_has_cm_dev(id_priv
))
2485 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2486 case RDMA_TRANSPORT_IB
:
2487 ret
= cma_modify_qp_err(id
);
2490 /* Initiate or respond to a disconnect. */
2491 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
2492 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
2494 case RDMA_TRANSPORT_IWARP
:
2495 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
2504 EXPORT_SYMBOL(rdma_disconnect
);
2506 static int cma_ib_mc_handler(int status
, struct ib_sa_multicast
*multicast
)
2508 struct rdma_id_private
*id_priv
;
2509 struct cma_multicast
*mc
= multicast
->context
;
2510 struct rdma_cm_event event
;
2513 id_priv
= mc
->id_priv
;
2514 if (cma_disable_remove(id_priv
, CMA_ADDR_BOUND
) &&
2515 cma_disable_remove(id_priv
, CMA_ADDR_RESOLVED
))
2518 if (!status
&& id_priv
->id
.qp
)
2519 status
= ib_attach_mcast(id_priv
->id
.qp
, &multicast
->rec
.mgid
,
2520 multicast
->rec
.mlid
);
2522 memset(&event
, 0, sizeof event
);
2523 event
.status
= status
;
2524 event
.param
.ud
.private_data
= mc
->context
;
2526 event
.event
= RDMA_CM_EVENT_MULTICAST_JOIN
;
2527 ib_init_ah_from_mcmember(id_priv
->id
.device
,
2528 id_priv
->id
.port_num
, &multicast
->rec
,
2529 &event
.param
.ud
.ah_attr
);
2530 event
.param
.ud
.qp_num
= 0xFFFFFF;
2531 event
.param
.ud
.qkey
= be32_to_cpu(multicast
->rec
.qkey
);
2533 event
.event
= RDMA_CM_EVENT_MULTICAST_ERROR
;
2535 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2537 cma_exch(id_priv
, CMA_DESTROYING
);
2538 cma_enable_remove(id_priv
);
2539 rdma_destroy_id(&id_priv
->id
);
2543 cma_enable_remove(id_priv
);
2547 static void cma_set_mgid(struct rdma_id_private
*id_priv
,
2548 struct sockaddr
*addr
, union ib_gid
*mgid
)
2550 unsigned char mc_map
[MAX_ADDR_LEN
];
2551 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2552 struct sockaddr_in
*sin
= (struct sockaddr_in
*) addr
;
2553 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) addr
;
2555 if (cma_any_addr(addr
)) {
2556 memset(mgid
, 0, sizeof *mgid
);
2557 } else if ((addr
->sa_family
== AF_INET6
) &&
2558 ((be32_to_cpu(sin6
->sin6_addr
.s6_addr32
[0]) & 0xFF10A01B) ==
2560 /* IPv6 address is an SA assigned MGID. */
2561 memcpy(mgid
, &sin6
->sin6_addr
, sizeof *mgid
);
2563 ip_ib_mc_map(sin
->sin_addr
.s_addr
, mc_map
);
2564 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2565 mc_map
[7] = 0x01; /* Use RDMA CM signature */
2566 mc_map
[8] = ib_addr_get_pkey(dev_addr
) >> 8;
2567 mc_map
[9] = (unsigned char) ib_addr_get_pkey(dev_addr
);
2568 *mgid
= *(union ib_gid
*) (mc_map
+ 4);
2572 static int cma_join_ib_multicast(struct rdma_id_private
*id_priv
,
2573 struct cma_multicast
*mc
)
2575 struct ib_sa_mcmember_rec rec
;
2576 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2577 ib_sa_comp_mask comp_mask
;
2580 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
2581 ret
= ib_sa_get_mcmember_rec(id_priv
->id
.device
, id_priv
->id
.port_num
,
2586 cma_set_mgid(id_priv
, &mc
->addr
, &rec
.mgid
);
2587 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2588 rec
.qkey
= cpu_to_be32(RDMA_UDP_QKEY
);
2589 ib_addr_get_sgid(dev_addr
, &rec
.port_gid
);
2590 rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(dev_addr
));
2593 comp_mask
= IB_SA_MCMEMBER_REC_MGID
| IB_SA_MCMEMBER_REC_PORT_GID
|
2594 IB_SA_MCMEMBER_REC_PKEY
| IB_SA_MCMEMBER_REC_JOIN_STATE
|
2595 IB_SA_MCMEMBER_REC_QKEY
| IB_SA_MCMEMBER_REC_SL
|
2596 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
2597 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
;
2599 mc
->multicast
.ib
= ib_sa_join_multicast(&sa_client
, id_priv
->id
.device
,
2600 id_priv
->id
.port_num
, &rec
,
2601 comp_mask
, GFP_KERNEL
,
2602 cma_ib_mc_handler
, mc
);
2603 if (IS_ERR(mc
->multicast
.ib
))
2604 return PTR_ERR(mc
->multicast
.ib
);
2609 int rdma_join_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
,
2612 struct rdma_id_private
*id_priv
;
2613 struct cma_multicast
*mc
;
2616 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2617 if (!cma_comp(id_priv
, CMA_ADDR_BOUND
) &&
2618 !cma_comp(id_priv
, CMA_ADDR_RESOLVED
))
2621 mc
= kmalloc(sizeof *mc
, GFP_KERNEL
);
2625 memcpy(&mc
->addr
, addr
, ip_addr_size(addr
));
2626 mc
->context
= context
;
2627 mc
->id_priv
= id_priv
;
2629 spin_lock(&id_priv
->lock
);
2630 list_add(&mc
->list
, &id_priv
->mc_list
);
2631 spin_unlock(&id_priv
->lock
);
2633 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2634 case RDMA_TRANSPORT_IB
:
2635 ret
= cma_join_ib_multicast(id_priv
, mc
);
2643 spin_lock_irq(&id_priv
->lock
);
2644 list_del(&mc
->list
);
2645 spin_unlock_irq(&id_priv
->lock
);
2650 EXPORT_SYMBOL(rdma_join_multicast
);
2652 void rdma_leave_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
2654 struct rdma_id_private
*id_priv
;
2655 struct cma_multicast
*mc
;
2657 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2658 spin_lock_irq(&id_priv
->lock
);
2659 list_for_each_entry(mc
, &id_priv
->mc_list
, list
) {
2660 if (!memcmp(&mc
->addr
, addr
, ip_addr_size(addr
))) {
2661 list_del(&mc
->list
);
2662 spin_unlock_irq(&id_priv
->lock
);
2665 ib_detach_mcast(id
->qp
,
2666 &mc
->multicast
.ib
->rec
.mgid
,
2667 mc
->multicast
.ib
->rec
.mlid
);
2668 ib_sa_free_multicast(mc
->multicast
.ib
);
2673 spin_unlock_irq(&id_priv
->lock
);
2675 EXPORT_SYMBOL(rdma_leave_multicast
);
2677 static void cma_add_one(struct ib_device
*device
)
2679 struct cma_device
*cma_dev
;
2680 struct rdma_id_private
*id_priv
;
2682 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
2686 cma_dev
->device
= device
;
2688 init_completion(&cma_dev
->comp
);
2689 atomic_set(&cma_dev
->refcount
, 1);
2690 INIT_LIST_HEAD(&cma_dev
->id_list
);
2691 ib_set_client_data(device
, &cma_client
, cma_dev
);
2694 list_add_tail(&cma_dev
->list
, &dev_list
);
2695 list_for_each_entry(id_priv
, &listen_any_list
, list
)
2696 cma_listen_on_dev(id_priv
, cma_dev
);
2697 mutex_unlock(&lock
);
2700 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
2702 struct rdma_cm_event event
;
2703 enum cma_state state
;
2705 /* Record that we want to remove the device */
2706 state
= cma_exch(id_priv
, CMA_DEVICE_REMOVAL
);
2707 if (state
== CMA_DESTROYING
)
2710 cma_cancel_operation(id_priv
, state
);
2711 wait_event(id_priv
->wait_remove
, !atomic_read(&id_priv
->dev_remove
));
2713 /* Check for destruction from another callback. */
2714 if (!cma_comp(id_priv
, CMA_DEVICE_REMOVAL
))
2717 memset(&event
, 0, sizeof event
);
2718 event
.event
= RDMA_CM_EVENT_DEVICE_REMOVAL
;
2719 return id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2722 static void cma_process_remove(struct cma_device
*cma_dev
)
2724 struct rdma_id_private
*id_priv
;
2728 while (!list_empty(&cma_dev
->id_list
)) {
2729 id_priv
= list_entry(cma_dev
->id_list
.next
,
2730 struct rdma_id_private
, list
);
2732 if (cma_internal_listen(id_priv
)) {
2733 cma_destroy_listen(id_priv
);
2737 list_del_init(&id_priv
->list
);
2738 atomic_inc(&id_priv
->refcount
);
2739 mutex_unlock(&lock
);
2741 ret
= cma_remove_id_dev(id_priv
);
2742 cma_deref_id(id_priv
);
2744 rdma_destroy_id(&id_priv
->id
);
2748 mutex_unlock(&lock
);
2750 cma_deref_dev(cma_dev
);
2751 wait_for_completion(&cma_dev
->comp
);
2754 static void cma_remove_one(struct ib_device
*device
)
2756 struct cma_device
*cma_dev
;
2758 cma_dev
= ib_get_client_data(device
, &cma_client
);
2763 list_del(&cma_dev
->list
);
2764 mutex_unlock(&lock
);
2766 cma_process_remove(cma_dev
);
2770 static int cma_init(void)
2774 get_random_bytes(&next_port
, sizeof next_port
);
2775 next_port
= ((unsigned int) next_port
%
2776 (sysctl_local_port_range
[1] - sysctl_local_port_range
[0])) +
2777 sysctl_local_port_range
[0];
2778 cma_wq
= create_singlethread_workqueue("rdma_cm");
2782 ib_sa_register_client(&sa_client
);
2783 rdma_addr_register_client(&addr_client
);
2785 ret
= ib_register_client(&cma_client
);
2791 rdma_addr_unregister_client(&addr_client
);
2792 ib_sa_unregister_client(&sa_client
);
2793 destroy_workqueue(cma_wq
);
2797 static void cma_cleanup(void)
2799 ib_unregister_client(&cma_client
);
2800 rdma_addr_unregister_client(&addr_client
);
2801 ib_sa_unregister_client(&sa_client
);
2802 destroy_workqueue(cma_wq
);
2803 idr_destroy(&sdp_ps
);
2804 idr_destroy(&tcp_ps
);
2805 idr_destroy(&udp_ps
);
2806 idr_destroy(&ipoib_ps
);
2809 module_init(cma_init
);
2810 module_exit(cma_cleanup
);