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
);
75 struct list_head list
;
76 struct ib_device
*device
;
78 struct completion comp
;
80 struct list_head id_list
;
97 struct rdma_bind_list
{
99 struct hlist_head owners
;
104 * Device removal can occur at anytime, so we need extra handling to
105 * serialize notifying the user of device removal with other callbacks.
106 * We do this by disabling removal notification while a callback is in process,
107 * and reporting it after the callback completes.
109 struct rdma_id_private
{
110 struct rdma_cm_id id
;
112 struct rdma_bind_list
*bind_list
;
113 struct hlist_node node
;
114 struct list_head list
;
115 struct list_head listen_list
;
116 struct cma_device
*cma_dev
;
118 enum cma_state state
;
120 struct completion comp
;
122 wait_queue_head_t wait_remove
;
127 struct ib_sa_query
*query
;
136 enum ib_qp_type qp_type
;
141 struct work_struct work
;
142 struct rdma_id_private
*id
;
143 enum cma_state old_state
;
144 enum cma_state new_state
;
145 struct rdma_cm_event event
;
158 u8 ip_version
; /* IP version: 7:4 */
160 union cma_ip_addr src_addr
;
161 union cma_ip_addr dst_addr
;
166 u8 sdp_version
; /* Major version: 7:4 */
167 u8 ip_version
; /* IP version: 7:4 */
168 u8 sdp_specific1
[10];
171 union cma_ip_addr src_addr
;
172 union cma_ip_addr dst_addr
;
180 #define CMA_VERSION 0x00
181 #define SDP_MAJ_VERSION 0x2
183 static int cma_comp(struct rdma_id_private
*id_priv
, enum cma_state comp
)
188 spin_lock_irqsave(&id_priv
->lock
, flags
);
189 ret
= (id_priv
->state
== comp
);
190 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
194 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
195 enum cma_state comp
, enum cma_state exch
)
200 spin_lock_irqsave(&id_priv
->lock
, flags
);
201 if ((ret
= (id_priv
->state
== comp
)))
202 id_priv
->state
= exch
;
203 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
207 static enum cma_state
cma_exch(struct rdma_id_private
*id_priv
,
213 spin_lock_irqsave(&id_priv
->lock
, flags
);
214 old
= id_priv
->state
;
215 id_priv
->state
= exch
;
216 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
220 static inline u8
cma_get_ip_ver(struct cma_hdr
*hdr
)
222 return hdr
->ip_version
>> 4;
225 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
227 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
230 static inline u8
sdp_get_majv(u8 sdp_version
)
232 return sdp_version
>> 4;
235 static inline u8
sdp_get_ip_ver(struct sdp_hh
*hh
)
237 return hh
->ip_version
>> 4;
240 static inline void sdp_set_ip_ver(struct sdp_hh
*hh
, u8 ip_ver
)
242 hh
->ip_version
= (ip_ver
<< 4) | (hh
->ip_version
& 0xF);
245 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
246 struct cma_device
*cma_dev
)
248 atomic_inc(&cma_dev
->refcount
);
249 id_priv
->cma_dev
= cma_dev
;
250 id_priv
->id
.device
= cma_dev
->device
;
251 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
254 static inline void cma_deref_dev(struct cma_device
*cma_dev
)
256 if (atomic_dec_and_test(&cma_dev
->refcount
))
257 complete(&cma_dev
->comp
);
260 static void cma_detach_from_dev(struct rdma_id_private
*id_priv
)
262 list_del(&id_priv
->list
);
263 cma_deref_dev(id_priv
->cma_dev
);
264 id_priv
->cma_dev
= NULL
;
267 static int cma_acquire_dev(struct rdma_id_private
*id_priv
)
269 enum rdma_node_type dev_type
= id_priv
->id
.route
.addr
.dev_addr
.dev_type
;
270 struct cma_device
*cma_dev
;
274 switch (rdma_node_get_transport(dev_type
)) {
275 case RDMA_TRANSPORT_IB
:
276 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
278 case RDMA_TRANSPORT_IWARP
:
279 iw_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
285 list_for_each_entry(cma_dev
, &dev_list
, list
) {
286 ret
= ib_find_cached_gid(cma_dev
->device
, &gid
,
287 &id_priv
->id
.port_num
, NULL
);
289 cma_attach_to_dev(id_priv
, cma_dev
);
296 static void cma_deref_id(struct rdma_id_private
*id_priv
)
298 if (atomic_dec_and_test(&id_priv
->refcount
))
299 complete(&id_priv
->comp
);
302 static void cma_release_remove(struct rdma_id_private
*id_priv
)
304 if (atomic_dec_and_test(&id_priv
->dev_remove
))
305 wake_up(&id_priv
->wait_remove
);
308 struct rdma_cm_id
*rdma_create_id(rdma_cm_event_handler event_handler
,
309 void *context
, enum rdma_port_space ps
)
311 struct rdma_id_private
*id_priv
;
313 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
315 return ERR_PTR(-ENOMEM
);
317 id_priv
->state
= CMA_IDLE
;
318 id_priv
->id
.context
= context
;
319 id_priv
->id
.event_handler
= event_handler
;
321 spin_lock_init(&id_priv
->lock
);
322 init_completion(&id_priv
->comp
);
323 atomic_set(&id_priv
->refcount
, 1);
324 init_waitqueue_head(&id_priv
->wait_remove
);
325 atomic_set(&id_priv
->dev_remove
, 0);
326 INIT_LIST_HEAD(&id_priv
->listen_list
);
327 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
331 EXPORT_SYMBOL(rdma_create_id
);
333 static int cma_init_ib_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
335 struct ib_qp_attr qp_attr
;
336 struct rdma_dev_addr
*dev_addr
;
339 dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
340 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
341 ib_addr_get_pkey(dev_addr
),
342 &qp_attr
.pkey_index
);
346 qp_attr
.qp_state
= IB_QPS_INIT
;
347 qp_attr
.qp_access_flags
= IB_ACCESS_LOCAL_WRITE
;
348 qp_attr
.port_num
= id_priv
->id
.port_num
;
349 return ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_ACCESS_FLAGS
|
350 IB_QP_PKEY_INDEX
| IB_QP_PORT
);
353 static int cma_init_iw_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
355 struct ib_qp_attr qp_attr
;
357 qp_attr
.qp_state
= IB_QPS_INIT
;
358 qp_attr
.qp_access_flags
= IB_ACCESS_LOCAL_WRITE
;
360 return ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_ACCESS_FLAGS
);
363 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
364 struct ib_qp_init_attr
*qp_init_attr
)
366 struct rdma_id_private
*id_priv
;
370 id_priv
= container_of(id
, struct rdma_id_private
, id
);
371 if (id
->device
!= pd
->device
)
374 qp
= ib_create_qp(pd
, qp_init_attr
);
378 switch (rdma_node_get_transport(id
->device
->node_type
)) {
379 case RDMA_TRANSPORT_IB
:
380 ret
= cma_init_ib_qp(id_priv
, qp
);
382 case RDMA_TRANSPORT_IWARP
:
383 ret
= cma_init_iw_qp(id_priv
, qp
);
394 id_priv
->qp_num
= qp
->qp_num
;
395 id_priv
->qp_type
= qp
->qp_type
;
396 id_priv
->srq
= (qp
->srq
!= NULL
);
402 EXPORT_SYMBOL(rdma_create_qp
);
404 void rdma_destroy_qp(struct rdma_cm_id
*id
)
406 ib_destroy_qp(id
->qp
);
408 EXPORT_SYMBOL(rdma_destroy_qp
);
410 static int cma_modify_qp_rtr(struct rdma_cm_id
*id
)
412 struct ib_qp_attr qp_attr
;
413 int qp_attr_mask
, ret
;
418 /* Need to update QP attributes from default values. */
419 qp_attr
.qp_state
= IB_QPS_INIT
;
420 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
424 ret
= ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
428 qp_attr
.qp_state
= IB_QPS_RTR
;
429 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
433 return ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
436 static int cma_modify_qp_rts(struct rdma_cm_id
*id
)
438 struct ib_qp_attr qp_attr
;
439 int qp_attr_mask
, ret
;
444 qp_attr
.qp_state
= IB_QPS_RTS
;
445 ret
= rdma_init_qp_attr(id
, &qp_attr
, &qp_attr_mask
);
449 return ib_modify_qp(id
->qp
, &qp_attr
, qp_attr_mask
);
452 static int cma_modify_qp_err(struct rdma_cm_id
*id
)
454 struct ib_qp_attr qp_attr
;
459 qp_attr
.qp_state
= IB_QPS_ERR
;
460 return ib_modify_qp(id
->qp
, &qp_attr
, IB_QP_STATE
);
463 int rdma_init_qp_attr(struct rdma_cm_id
*id
, struct ib_qp_attr
*qp_attr
,
466 struct rdma_id_private
*id_priv
;
469 id_priv
= container_of(id
, struct rdma_id_private
, id
);
470 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
471 case RDMA_TRANSPORT_IB
:
472 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, qp_attr
,
474 if (qp_attr
->qp_state
== IB_QPS_RTR
)
475 qp_attr
->rq_psn
= id_priv
->seq_num
;
477 case RDMA_TRANSPORT_IWARP
:
478 ret
= iw_cm_init_qp_attr(id_priv
->cm_id
.iw
, qp_attr
,
488 EXPORT_SYMBOL(rdma_init_qp_attr
);
490 static inline int cma_zero_addr(struct sockaddr
*addr
)
492 struct in6_addr
*ip6
;
494 if (addr
->sa_family
== AF_INET
)
495 return ZERONET(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
497 ip6
= &((struct sockaddr_in6
*) addr
)->sin6_addr
;
498 return (ip6
->s6_addr32
[0] | ip6
->s6_addr32
[1] |
499 ip6
->s6_addr32
[2] | ip6
->s6_addr32
[3]) == 0;
503 static inline int cma_loopback_addr(struct sockaddr
*addr
)
505 return LOOPBACK(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
508 static inline int cma_any_addr(struct sockaddr
*addr
)
510 return cma_zero_addr(addr
) || cma_loopback_addr(addr
);
513 static inline int cma_any_port(struct sockaddr
*addr
)
515 return !((struct sockaddr_in
*) addr
)->sin_port
;
518 static int cma_get_net_info(void *hdr
, enum rdma_port_space ps
,
519 u8
*ip_ver
, __u16
*port
,
520 union cma_ip_addr
**src
, union cma_ip_addr
**dst
)
524 if (sdp_get_majv(((struct sdp_hh
*) hdr
)->sdp_version
) !=
528 *ip_ver
= sdp_get_ip_ver(hdr
);
529 *port
= ((struct sdp_hh
*) hdr
)->port
;
530 *src
= &((struct sdp_hh
*) hdr
)->src_addr
;
531 *dst
= &((struct sdp_hh
*) hdr
)->dst_addr
;
534 if (((struct cma_hdr
*) hdr
)->cma_version
!= CMA_VERSION
)
537 *ip_ver
= cma_get_ip_ver(hdr
);
538 *port
= ((struct cma_hdr
*) hdr
)->port
;
539 *src
= &((struct cma_hdr
*) hdr
)->src_addr
;
540 *dst
= &((struct cma_hdr
*) hdr
)->dst_addr
;
544 if (*ip_ver
!= 4 && *ip_ver
!= 6)
549 static void cma_save_net_info(struct rdma_addr
*addr
,
550 struct rdma_addr
*listen_addr
,
551 u8 ip_ver
, __u16 port
,
552 union cma_ip_addr
*src
, union cma_ip_addr
*dst
)
554 struct sockaddr_in
*listen4
, *ip4
;
555 struct sockaddr_in6
*listen6
, *ip6
;
559 listen4
= (struct sockaddr_in
*) &listen_addr
->src_addr
;
560 ip4
= (struct sockaddr_in
*) &addr
->src_addr
;
561 ip4
->sin_family
= listen4
->sin_family
;
562 ip4
->sin_addr
.s_addr
= dst
->ip4
.addr
;
563 ip4
->sin_port
= listen4
->sin_port
;
565 ip4
= (struct sockaddr_in
*) &addr
->dst_addr
;
566 ip4
->sin_family
= listen4
->sin_family
;
567 ip4
->sin_addr
.s_addr
= src
->ip4
.addr
;
568 ip4
->sin_port
= port
;
571 listen6
= (struct sockaddr_in6
*) &listen_addr
->src_addr
;
572 ip6
= (struct sockaddr_in6
*) &addr
->src_addr
;
573 ip6
->sin6_family
= listen6
->sin6_family
;
574 ip6
->sin6_addr
= dst
->ip6
;
575 ip6
->sin6_port
= listen6
->sin6_port
;
577 ip6
= (struct sockaddr_in6
*) &addr
->dst_addr
;
578 ip6
->sin6_family
= listen6
->sin6_family
;
579 ip6
->sin6_addr
= src
->ip6
;
580 ip6
->sin6_port
= port
;
587 static inline int cma_user_data_offset(enum rdma_port_space ps
)
593 return sizeof(struct cma_hdr
);
597 static int cma_notify_user(struct rdma_id_private
*id_priv
,
598 enum rdma_cm_event_type type
, int status
,
599 void *data
, u8 data_len
)
601 struct rdma_cm_event event
;
604 event
.status
= status
;
605 event
.private_data
= data
;
606 event
.private_data_len
= data_len
;
608 return id_priv
->id
.event_handler(&id_priv
->id
, &event
);
611 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
613 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
614 case RDMA_TRANSPORT_IB
:
616 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
623 static inline int cma_internal_listen(struct rdma_id_private
*id_priv
)
625 return (id_priv
->state
== CMA_LISTEN
) && id_priv
->cma_dev
&&
626 cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
);
629 static void cma_destroy_listen(struct rdma_id_private
*id_priv
)
631 cma_exch(id_priv
, CMA_DESTROYING
);
633 if (id_priv
->cma_dev
) {
634 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
635 case RDMA_TRANSPORT_IB
:
636 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
637 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
639 case RDMA_TRANSPORT_IWARP
:
640 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
641 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
646 cma_detach_from_dev(id_priv
);
648 list_del(&id_priv
->listen_list
);
650 cma_deref_id(id_priv
);
651 wait_for_completion(&id_priv
->comp
);
656 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
658 struct rdma_id_private
*dev_id_priv
;
661 list_del(&id_priv
->list
);
663 while (!list_empty(&id_priv
->listen_list
)) {
664 dev_id_priv
= list_entry(id_priv
->listen_list
.next
,
665 struct rdma_id_private
, listen_list
);
666 cma_destroy_listen(dev_id_priv
);
671 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
672 enum cma_state state
)
676 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
678 case CMA_ROUTE_QUERY
:
679 cma_cancel_route(id_priv
);
682 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
) &&
684 cma_cancel_listens(id_priv
);
691 static void cma_release_port(struct rdma_id_private
*id_priv
)
693 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
699 hlist_del(&id_priv
->node
);
700 if (hlist_empty(&bind_list
->owners
)) {
701 idr_remove(bind_list
->ps
, bind_list
->port
);
707 void rdma_destroy_id(struct rdma_cm_id
*id
)
709 struct rdma_id_private
*id_priv
;
710 enum cma_state state
;
712 id_priv
= container_of(id
, struct rdma_id_private
, id
);
713 state
= cma_exch(id_priv
, CMA_DESTROYING
);
714 cma_cancel_operation(id_priv
, state
);
717 if (id_priv
->cma_dev
) {
719 switch (rdma_node_get_transport(id
->device
->node_type
)) {
720 case RDMA_TRANSPORT_IB
:
721 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
722 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
724 case RDMA_TRANSPORT_IWARP
:
725 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
726 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
732 cma_detach_from_dev(id_priv
);
736 cma_release_port(id_priv
);
737 cma_deref_id(id_priv
);
738 wait_for_completion(&id_priv
->comp
);
740 kfree(id_priv
->id
.route
.path_rec
);
743 EXPORT_SYMBOL(rdma_destroy_id
);
745 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
749 ret
= cma_modify_qp_rtr(&id_priv
->id
);
753 ret
= cma_modify_qp_rts(&id_priv
->id
);
757 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
763 cma_modify_qp_err(&id_priv
->id
);
764 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
769 static int cma_verify_rep(struct rdma_id_private
*id_priv
, void *data
)
771 if (id_priv
->id
.ps
== RDMA_PS_SDP
&&
772 sdp_get_majv(((struct sdp_hah
*) data
)->sdp_version
) !=
779 static int cma_rtu_recv(struct rdma_id_private
*id_priv
)
783 ret
= cma_modify_qp_rts(&id_priv
->id
);
789 cma_modify_qp_err(&id_priv
->id
);
790 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
795 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
797 struct rdma_id_private
*id_priv
= cm_id
->context
;
798 enum rdma_cm_event_type event
;
799 u8 private_data_len
= 0;
800 int ret
= 0, status
= 0;
802 atomic_inc(&id_priv
->dev_remove
);
803 if (!cma_comp(id_priv
, CMA_CONNECT
))
806 switch (ib_event
->event
) {
807 case IB_CM_REQ_ERROR
:
808 case IB_CM_REP_ERROR
:
809 event
= RDMA_CM_EVENT_UNREACHABLE
;
812 case IB_CM_REP_RECEIVED
:
813 status
= cma_verify_rep(id_priv
, ib_event
->private_data
);
815 event
= RDMA_CM_EVENT_CONNECT_ERROR
;
816 else if (id_priv
->id
.qp
&& id_priv
->id
.ps
!= RDMA_PS_SDP
) {
817 status
= cma_rep_recv(id_priv
);
818 event
= status
? RDMA_CM_EVENT_CONNECT_ERROR
:
819 RDMA_CM_EVENT_ESTABLISHED
;
821 event
= RDMA_CM_EVENT_CONNECT_RESPONSE
;
822 private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
824 case IB_CM_RTU_RECEIVED
:
825 status
= cma_rtu_recv(id_priv
);
826 event
= status
? RDMA_CM_EVENT_CONNECT_ERROR
:
827 RDMA_CM_EVENT_ESTABLISHED
;
829 case IB_CM_DREQ_ERROR
:
830 status
= -ETIMEDOUT
; /* fall through */
831 case IB_CM_DREQ_RECEIVED
:
832 case IB_CM_DREP_RECEIVED
:
833 if (!cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_DISCONNECT
))
835 event
= RDMA_CM_EVENT_DISCONNECTED
;
837 case IB_CM_TIMEWAIT_EXIT
:
838 case IB_CM_MRA_RECEIVED
:
841 case IB_CM_REJ_RECEIVED
:
842 cma_modify_qp_err(&id_priv
->id
);
843 status
= ib_event
->param
.rej_rcvd
.reason
;
844 event
= RDMA_CM_EVENT_REJECTED
;
845 private_data_len
= IB_CM_REJ_PRIVATE_DATA_SIZE
;
848 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
853 ret
= cma_notify_user(id_priv
, event
, status
, ib_event
->private_data
,
856 /* Destroy the CM ID by returning a non-zero value. */
857 id_priv
->cm_id
.ib
= NULL
;
858 cma_exch(id_priv
, CMA_DESTROYING
);
859 cma_release_remove(id_priv
);
860 rdma_destroy_id(&id_priv
->id
);
864 cma_release_remove(id_priv
);
868 static struct rdma_id_private
*cma_new_id(struct rdma_cm_id
*listen_id
,
869 struct ib_cm_event
*ib_event
)
871 struct rdma_id_private
*id_priv
;
872 struct rdma_cm_id
*id
;
873 struct rdma_route
*rt
;
874 union cma_ip_addr
*src
, *dst
;
878 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
879 &ip_ver
, &port
, &src
, &dst
))
882 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
887 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
888 ip_ver
, port
, src
, dst
);
891 rt
->num_paths
= ib_event
->param
.req_rcvd
.alternate_path
? 2 : 1;
892 rt
->path_rec
= kmalloc(sizeof *rt
->path_rec
* rt
->num_paths
,
897 rt
->path_rec
[0] = *ib_event
->param
.req_rcvd
.primary_path
;
898 if (rt
->num_paths
== 2)
899 rt
->path_rec
[1] = *ib_event
->param
.req_rcvd
.alternate_path
;
901 ib_addr_set_sgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].sgid
);
902 ib_addr_set_dgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].dgid
);
903 ib_addr_set_pkey(&rt
->addr
.dev_addr
, be16_to_cpu(rt
->path_rec
[0].pkey
));
904 rt
->addr
.dev_addr
.dev_type
= RDMA_NODE_IB_CA
;
906 id_priv
= container_of(id
, struct rdma_id_private
, id
);
907 id_priv
->state
= CMA_CONNECT
;
916 static int cma_req_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
918 struct rdma_id_private
*listen_id
, *conn_id
;
921 listen_id
= cm_id
->context
;
922 atomic_inc(&listen_id
->dev_remove
);
923 if (!cma_comp(listen_id
, CMA_LISTEN
)) {
928 conn_id
= cma_new_id(&listen_id
->id
, ib_event
);
934 atomic_inc(&conn_id
->dev_remove
);
936 ret
= cma_acquire_dev(conn_id
);
940 cma_exch(conn_id
, CMA_DESTROYING
);
941 cma_release_remove(conn_id
);
942 rdma_destroy_id(&conn_id
->id
);
946 conn_id
->cm_id
.ib
= cm_id
;
947 cm_id
->context
= conn_id
;
948 cm_id
->cm_handler
= cma_ib_handler
;
950 offset
= cma_user_data_offset(listen_id
->id
.ps
);
951 ret
= cma_notify_user(conn_id
, RDMA_CM_EVENT_CONNECT_REQUEST
, 0,
952 ib_event
->private_data
+ offset
,
953 IB_CM_REQ_PRIVATE_DATA_SIZE
- offset
);
955 /* Destroy the CM ID by returning a non-zero value. */
956 conn_id
->cm_id
.ib
= NULL
;
957 cma_exch(conn_id
, CMA_DESTROYING
);
958 cma_release_remove(conn_id
);
959 rdma_destroy_id(&conn_id
->id
);
962 cma_release_remove(listen_id
);
966 static __be64
cma_get_service_id(enum rdma_port_space ps
, struct sockaddr
*addr
)
968 return cpu_to_be64(((u64
)ps
<< 16) +
969 be16_to_cpu(((struct sockaddr_in
*) addr
)->sin_port
));
972 static void cma_set_compare_data(enum rdma_port_space ps
, struct sockaddr
*addr
,
973 struct ib_cm_compare_data
*compare
)
975 struct cma_hdr
*cma_data
, *cma_mask
;
976 struct sdp_hh
*sdp_data
, *sdp_mask
;
978 struct in6_addr ip6_addr
;
980 memset(compare
, 0, sizeof *compare
);
981 cma_data
= (void *) compare
->data
;
982 cma_mask
= (void *) compare
->mask
;
983 sdp_data
= (void *) compare
->data
;
984 sdp_mask
= (void *) compare
->mask
;
986 switch (addr
->sa_family
) {
988 ip4_addr
= ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
;
989 if (ps
== RDMA_PS_SDP
) {
990 sdp_set_ip_ver(sdp_data
, 4);
991 sdp_set_ip_ver(sdp_mask
, 0xF);
992 sdp_data
->dst_addr
.ip4
.addr
= ip4_addr
;
993 sdp_mask
->dst_addr
.ip4
.addr
= ~0;
995 cma_set_ip_ver(cma_data
, 4);
996 cma_set_ip_ver(cma_mask
, 0xF);
997 cma_data
->dst_addr
.ip4
.addr
= ip4_addr
;
998 cma_mask
->dst_addr
.ip4
.addr
= ~0;
1002 ip6_addr
= ((struct sockaddr_in6
*) addr
)->sin6_addr
;
1003 if (ps
== RDMA_PS_SDP
) {
1004 sdp_set_ip_ver(sdp_data
, 6);
1005 sdp_set_ip_ver(sdp_mask
, 0xF);
1006 sdp_data
->dst_addr
.ip6
= ip6_addr
;
1007 memset(&sdp_mask
->dst_addr
.ip6
, 0xFF,
1008 sizeof sdp_mask
->dst_addr
.ip6
);
1010 cma_set_ip_ver(cma_data
, 6);
1011 cma_set_ip_ver(cma_mask
, 0xF);
1012 cma_data
->dst_addr
.ip6
= ip6_addr
;
1013 memset(&cma_mask
->dst_addr
.ip6
, 0xFF,
1014 sizeof cma_mask
->dst_addr
.ip6
);
1022 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1024 struct rdma_id_private
*id_priv
= iw_id
->context
;
1025 enum rdma_cm_event_type event
= 0;
1026 struct sockaddr_in
*sin
;
1029 atomic_inc(&id_priv
->dev_remove
);
1031 switch (iw_event
->event
) {
1032 case IW_CM_EVENT_CLOSE
:
1033 event
= RDMA_CM_EVENT_DISCONNECTED
;
1035 case IW_CM_EVENT_CONNECT_REPLY
:
1036 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1037 *sin
= iw_event
->local_addr
;
1038 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1039 *sin
= iw_event
->remote_addr
;
1040 if (iw_event
->status
)
1041 event
= RDMA_CM_EVENT_REJECTED
;
1043 event
= RDMA_CM_EVENT_ESTABLISHED
;
1045 case IW_CM_EVENT_ESTABLISHED
:
1046 event
= RDMA_CM_EVENT_ESTABLISHED
;
1052 ret
= cma_notify_user(id_priv
, event
, iw_event
->status
,
1053 iw_event
->private_data
,
1054 iw_event
->private_data_len
);
1056 /* Destroy the CM ID by returning a non-zero value. */
1057 id_priv
->cm_id
.iw
= NULL
;
1058 cma_exch(id_priv
, CMA_DESTROYING
);
1059 cma_release_remove(id_priv
);
1060 rdma_destroy_id(&id_priv
->id
);
1064 cma_release_remove(id_priv
);
1068 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
1069 struct iw_cm_event
*iw_event
)
1071 struct rdma_cm_id
*new_cm_id
;
1072 struct rdma_id_private
*listen_id
, *conn_id
;
1073 struct sockaddr_in
*sin
;
1074 struct net_device
*dev
= NULL
;
1077 listen_id
= cm_id
->context
;
1078 atomic_inc(&listen_id
->dev_remove
);
1079 if (!cma_comp(listen_id
, CMA_LISTEN
)) {
1080 ret
= -ECONNABORTED
;
1084 /* Create a new RDMA id for the new IW CM ID */
1085 new_cm_id
= rdma_create_id(listen_id
->id
.event_handler
,
1086 listen_id
->id
.context
,
1092 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
1093 atomic_inc(&conn_id
->dev_remove
);
1094 conn_id
->state
= CMA_CONNECT
;
1096 dev
= ip_dev_find(iw_event
->local_addr
.sin_addr
.s_addr
);
1098 ret
= -EADDRNOTAVAIL
;
1099 cma_release_remove(conn_id
);
1100 rdma_destroy_id(new_cm_id
);
1103 ret
= rdma_copy_addr(&conn_id
->id
.route
.addr
.dev_addr
, dev
, NULL
);
1105 cma_release_remove(conn_id
);
1106 rdma_destroy_id(new_cm_id
);
1111 ret
= cma_acquire_dev(conn_id
);
1112 mutex_unlock(&lock
);
1114 cma_release_remove(conn_id
);
1115 rdma_destroy_id(new_cm_id
);
1119 conn_id
->cm_id
.iw
= cm_id
;
1120 cm_id
->context
= conn_id
;
1121 cm_id
->cm_handler
= cma_iw_handler
;
1123 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.src_addr
;
1124 *sin
= iw_event
->local_addr
;
1125 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.dst_addr
;
1126 *sin
= iw_event
->remote_addr
;
1128 ret
= cma_notify_user(conn_id
, RDMA_CM_EVENT_CONNECT_REQUEST
, 0,
1129 iw_event
->private_data
,
1130 iw_event
->private_data_len
);
1132 /* User wants to destroy the CM ID */
1133 conn_id
->cm_id
.iw
= NULL
;
1134 cma_exch(conn_id
, CMA_DESTROYING
);
1135 cma_release_remove(conn_id
);
1136 rdma_destroy_id(&conn_id
->id
);
1142 cma_release_remove(listen_id
);
1146 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
1148 struct ib_cm_compare_data compare_data
;
1149 struct sockaddr
*addr
;
1153 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_req_handler
,
1155 if (IS_ERR(id_priv
->cm_id
.ib
))
1156 return PTR_ERR(id_priv
->cm_id
.ib
);
1158 addr
= &id_priv
->id
.route
.addr
.src_addr
;
1159 svc_id
= cma_get_service_id(id_priv
->id
.ps
, addr
);
1160 if (cma_any_addr(addr
))
1161 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, NULL
);
1163 cma_set_compare_data(id_priv
->id
.ps
, addr
, &compare_data
);
1164 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, &compare_data
);
1168 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1169 id_priv
->cm_id
.ib
= NULL
;
1175 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
1178 struct sockaddr_in
*sin
;
1180 id_priv
->cm_id
.iw
= iw_create_cm_id(id_priv
->id
.device
,
1181 iw_conn_req_handler
,
1183 if (IS_ERR(id_priv
->cm_id
.iw
))
1184 return PTR_ERR(id_priv
->cm_id
.iw
);
1186 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1187 id_priv
->cm_id
.iw
->local_addr
= *sin
;
1189 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
1192 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1193 id_priv
->cm_id
.iw
= NULL
;
1199 static int cma_listen_handler(struct rdma_cm_id
*id
,
1200 struct rdma_cm_event
*event
)
1202 struct rdma_id_private
*id_priv
= id
->context
;
1204 id
->context
= id_priv
->id
.context
;
1205 id
->event_handler
= id_priv
->id
.event_handler
;
1206 return id_priv
->id
.event_handler(id
, event
);
1209 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
1210 struct cma_device
*cma_dev
)
1212 struct rdma_id_private
*dev_id_priv
;
1213 struct rdma_cm_id
*id
;
1216 id
= rdma_create_id(cma_listen_handler
, id_priv
, id_priv
->id
.ps
);
1220 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
1222 dev_id_priv
->state
= CMA_ADDR_BOUND
;
1223 memcpy(&id
->route
.addr
.src_addr
, &id_priv
->id
.route
.addr
.src_addr
,
1224 ip_addr_size(&id_priv
->id
.route
.addr
.src_addr
));
1226 cma_attach_to_dev(dev_id_priv
, cma_dev
);
1227 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
1229 ret
= rdma_listen(id
, id_priv
->backlog
);
1235 cma_destroy_listen(dev_id_priv
);
1238 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
1240 struct cma_device
*cma_dev
;
1243 list_add_tail(&id_priv
->list
, &listen_any_list
);
1244 list_for_each_entry(cma_dev
, &dev_list
, list
)
1245 cma_listen_on_dev(id_priv
, cma_dev
);
1246 mutex_unlock(&lock
);
1249 static int cma_bind_any(struct rdma_cm_id
*id
, sa_family_t af
)
1251 struct sockaddr_in addr_in
;
1253 memset(&addr_in
, 0, sizeof addr_in
);
1254 addr_in
.sin_family
= af
;
1255 return rdma_bind_addr(id
, (struct sockaddr
*) &addr_in
);
1258 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
1260 struct rdma_id_private
*id_priv
;
1263 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1264 if (id_priv
->state
== CMA_IDLE
) {
1265 ret
= cma_bind_any(id
, AF_INET
);
1270 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_LISTEN
))
1273 id_priv
->backlog
= backlog
;
1275 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1276 case RDMA_TRANSPORT_IB
:
1277 ret
= cma_ib_listen(id_priv
);
1281 case RDMA_TRANSPORT_IWARP
:
1282 ret
= cma_iw_listen(id_priv
, backlog
);
1291 cma_listen_on_all(id_priv
);
1295 id_priv
->backlog
= 0;
1296 cma_comp_exch(id_priv
, CMA_LISTEN
, CMA_ADDR_BOUND
);
1299 EXPORT_SYMBOL(rdma_listen
);
1301 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
1304 struct cma_work
*work
= context
;
1305 struct rdma_route
*route
;
1307 route
= &work
->id
->id
.route
;
1310 route
->num_paths
= 1;
1311 *route
->path_rec
= *path_rec
;
1313 work
->old_state
= CMA_ROUTE_QUERY
;
1314 work
->new_state
= CMA_ADDR_RESOLVED
;
1315 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
1316 work
->event
.status
= status
;
1319 queue_work(cma_wq
, &work
->work
);
1322 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
1323 struct cma_work
*work
)
1325 struct rdma_dev_addr
*addr
= &id_priv
->id
.route
.addr
.dev_addr
;
1326 struct ib_sa_path_rec path_rec
;
1328 memset(&path_rec
, 0, sizeof path_rec
);
1329 ib_addr_get_sgid(addr
, &path_rec
.sgid
);
1330 ib_addr_get_dgid(addr
, &path_rec
.dgid
);
1331 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(addr
));
1332 path_rec
.numb_path
= 1;
1334 id_priv
->query_id
= ib_sa_path_rec_get(&sa_client
, id_priv
->id
.device
,
1335 id_priv
->id
.port_num
, &path_rec
,
1336 IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
1337 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
,
1338 timeout_ms
, GFP_KERNEL
,
1339 cma_query_handler
, work
, &id_priv
->query
);
1341 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
1344 static void cma_work_handler(void *data
)
1346 struct cma_work
*work
= data
;
1347 struct rdma_id_private
*id_priv
= work
->id
;
1350 atomic_inc(&id_priv
->dev_remove
);
1351 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
1354 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
1355 cma_exch(id_priv
, CMA_DESTROYING
);
1359 cma_release_remove(id_priv
);
1360 cma_deref_id(id_priv
);
1362 rdma_destroy_id(&id_priv
->id
);
1366 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1368 struct rdma_route
*route
= &id_priv
->id
.route
;
1369 struct cma_work
*work
;
1372 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1377 INIT_WORK(&work
->work
, cma_work_handler
, work
);
1378 work
->old_state
= CMA_ROUTE_QUERY
;
1379 work
->new_state
= CMA_ROUTE_RESOLVED
;
1380 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1382 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
1383 if (!route
->path_rec
) {
1388 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
1394 kfree(route
->path_rec
);
1395 route
->path_rec
= NULL
;
1401 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
1402 struct ib_sa_path_rec
*path_rec
, int num_paths
)
1404 struct rdma_id_private
*id_priv
;
1407 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1408 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_RESOLVED
))
1411 id
->route
.path_rec
= kmalloc(sizeof *path_rec
* num_paths
, GFP_KERNEL
);
1412 if (!id
->route
.path_rec
) {
1417 memcpy(id
->route
.path_rec
, path_rec
, sizeof *path_rec
* num_paths
);
1420 cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_ADDR_RESOLVED
);
1423 EXPORT_SYMBOL(rdma_set_ib_paths
);
1425 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1427 struct cma_work
*work
;
1429 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1434 INIT_WORK(&work
->work
, cma_work_handler
, work
);
1435 work
->old_state
= CMA_ROUTE_QUERY
;
1436 work
->new_state
= CMA_ROUTE_RESOLVED
;
1437 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1438 queue_work(cma_wq
, &work
->work
);
1442 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
1444 struct rdma_id_private
*id_priv
;
1447 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1448 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_QUERY
))
1451 atomic_inc(&id_priv
->refcount
);
1452 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1453 case RDMA_TRANSPORT_IB
:
1454 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
1456 case RDMA_TRANSPORT_IWARP
:
1457 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
1468 cma_comp_exch(id_priv
, CMA_ROUTE_QUERY
, CMA_ADDR_RESOLVED
);
1469 cma_deref_id(id_priv
);
1472 EXPORT_SYMBOL(rdma_resolve_route
);
1474 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
1476 struct cma_device
*cma_dev
;
1477 struct ib_port_attr port_attr
;
1484 list_for_each_entry(cma_dev
, &dev_list
, list
)
1485 for (p
= 1; p
<= cma_dev
->device
->phys_port_cnt
; ++p
)
1486 if (!ib_query_port (cma_dev
->device
, p
, &port_attr
) &&
1487 port_attr
.state
== IB_PORT_ACTIVE
)
1490 if (!list_empty(&dev_list
)) {
1492 cma_dev
= list_entry(dev_list
.next
, struct cma_device
, list
);
1499 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
);
1503 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
1507 ib_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1508 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
1509 id_priv
->id
.port_num
= p
;
1510 cma_attach_to_dev(id_priv
, cma_dev
);
1512 mutex_unlock(&lock
);
1516 static void addr_handler(int status
, struct sockaddr
*src_addr
,
1517 struct rdma_dev_addr
*dev_addr
, void *context
)
1519 struct rdma_id_private
*id_priv
= context
;
1520 enum rdma_cm_event_type event
;
1522 atomic_inc(&id_priv
->dev_remove
);
1525 * Grab mutex to block rdma_destroy_id() from removing the device while
1526 * we're trying to acquire it.
1529 if (!cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_RESOLVED
)) {
1530 mutex_unlock(&lock
);
1534 if (!status
&& !id_priv
->cma_dev
)
1535 status
= cma_acquire_dev(id_priv
);
1536 mutex_unlock(&lock
);
1539 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ADDR_BOUND
))
1541 event
= RDMA_CM_EVENT_ADDR_ERROR
;
1543 memcpy(&id_priv
->id
.route
.addr
.src_addr
, src_addr
,
1544 ip_addr_size(src_addr
));
1545 event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1548 if (cma_notify_user(id_priv
, event
, status
, NULL
, 0)) {
1549 cma_exch(id_priv
, CMA_DESTROYING
);
1550 cma_release_remove(id_priv
);
1551 cma_deref_id(id_priv
);
1552 rdma_destroy_id(&id_priv
->id
);
1556 cma_release_remove(id_priv
);
1557 cma_deref_id(id_priv
);
1560 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
1562 struct cma_work
*work
;
1563 struct sockaddr_in
*src_in
, *dst_in
;
1567 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1571 if (!id_priv
->cma_dev
) {
1572 ret
= cma_bind_loopback(id_priv
);
1577 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1578 ib_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1580 if (cma_zero_addr(&id_priv
->id
.route
.addr
.src_addr
)) {
1581 src_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.src_addr
;
1582 dst_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.dst_addr
;
1583 src_in
->sin_family
= dst_in
->sin_family
;
1584 src_in
->sin_addr
.s_addr
= dst_in
->sin_addr
.s_addr
;
1588 INIT_WORK(&work
->work
, cma_work_handler
, work
);
1589 work
->old_state
= CMA_ADDR_QUERY
;
1590 work
->new_state
= CMA_ADDR_RESOLVED
;
1591 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1592 queue_work(cma_wq
, &work
->work
);
1599 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1600 struct sockaddr
*dst_addr
)
1602 if (src_addr
&& src_addr
->sa_family
)
1603 return rdma_bind_addr(id
, src_addr
);
1605 return cma_bind_any(id
, dst_addr
->sa_family
);
1608 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1609 struct sockaddr
*dst_addr
, int timeout_ms
)
1611 struct rdma_id_private
*id_priv
;
1614 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1615 if (id_priv
->state
== CMA_IDLE
) {
1616 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
1621 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_ADDR_QUERY
))
1624 atomic_inc(&id_priv
->refcount
);
1625 memcpy(&id
->route
.addr
.dst_addr
, dst_addr
, ip_addr_size(dst_addr
));
1626 if (cma_any_addr(dst_addr
))
1627 ret
= cma_resolve_loopback(id_priv
);
1629 ret
= rdma_resolve_ip(&addr_client
, &id
->route
.addr
.src_addr
,
1630 dst_addr
, &id
->route
.addr
.dev_addr
,
1631 timeout_ms
, addr_handler
, id_priv
);
1637 cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_BOUND
);
1638 cma_deref_id(id_priv
);
1641 EXPORT_SYMBOL(rdma_resolve_addr
);
1643 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
1644 struct rdma_id_private
*id_priv
)
1646 struct sockaddr_in
*sin
;
1648 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1649 sin
->sin_port
= htons(bind_list
->port
);
1650 id_priv
->bind_list
= bind_list
;
1651 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
1654 static int cma_alloc_port(struct idr
*ps
, struct rdma_id_private
*id_priv
,
1655 unsigned short snum
)
1657 struct rdma_bind_list
*bind_list
;
1658 int port
, start
, ret
;
1660 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1664 start
= snum
? snum
: sysctl_local_port_range
[0];
1667 ret
= idr_get_new_above(ps
, bind_list
, start
, &port
);
1668 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1673 if ((snum
&& port
!= snum
) ||
1674 (!snum
&& port
> sysctl_local_port_range
[1])) {
1675 idr_remove(ps
, port
);
1676 ret
= -EADDRNOTAVAIL
;
1681 bind_list
->port
= (unsigned short) port
;
1682 cma_bind_port(bind_list
, id_priv
);
1689 static int cma_use_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1691 struct rdma_id_private
*cur_id
;
1692 struct sockaddr_in
*sin
, *cur_sin
;
1693 struct rdma_bind_list
*bind_list
;
1694 struct hlist_node
*node
;
1695 unsigned short snum
;
1697 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1698 snum
= ntohs(sin
->sin_port
);
1699 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
1702 bind_list
= idr_find(ps
, snum
);
1704 return cma_alloc_port(ps
, id_priv
, snum
);
1707 * We don't support binding to any address if anyone is bound to
1708 * a specific address on the same port.
1710 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
))
1711 return -EADDRNOTAVAIL
;
1713 hlist_for_each_entry(cur_id
, node
, &bind_list
->owners
, node
) {
1714 if (cma_any_addr(&cur_id
->id
.route
.addr
.src_addr
))
1715 return -EADDRNOTAVAIL
;
1717 cur_sin
= (struct sockaddr_in
*) &cur_id
->id
.route
.addr
.src_addr
;
1718 if (sin
->sin_addr
.s_addr
== cur_sin
->sin_addr
.s_addr
)
1722 cma_bind_port(bind_list
, id_priv
);
1726 static int cma_get_port(struct rdma_id_private
*id_priv
)
1731 switch (id_priv
->id
.ps
) {
1739 return -EPROTONOSUPPORT
;
1743 if (cma_any_port(&id_priv
->id
.route
.addr
.src_addr
))
1744 ret
= cma_alloc_port(ps
, id_priv
, 0);
1746 ret
= cma_use_port(ps
, id_priv
);
1747 mutex_unlock(&lock
);
1752 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
1754 struct rdma_id_private
*id_priv
;
1757 if (addr
->sa_family
!= AF_INET
)
1758 return -EAFNOSUPPORT
;
1760 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1761 if (!cma_comp_exch(id_priv
, CMA_IDLE
, CMA_ADDR_BOUND
))
1764 if (!cma_any_addr(addr
)) {
1765 ret
= rdma_translate_ip(addr
, &id
->route
.addr
.dev_addr
);
1770 ret
= cma_acquire_dev(id_priv
);
1771 mutex_unlock(&lock
);
1776 memcpy(&id
->route
.addr
.src_addr
, addr
, ip_addr_size(addr
));
1777 ret
= cma_get_port(id_priv
);
1783 if (!cma_any_addr(addr
)) {
1785 cma_detach_from_dev(id_priv
);
1786 mutex_unlock(&lock
);
1789 cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_IDLE
);
1792 EXPORT_SYMBOL(rdma_bind_addr
);
1794 static int cma_format_hdr(void *hdr
, enum rdma_port_space ps
,
1795 struct rdma_route
*route
)
1797 struct sockaddr_in
*src4
, *dst4
;
1798 struct cma_hdr
*cma_hdr
;
1799 struct sdp_hh
*sdp_hdr
;
1801 src4
= (struct sockaddr_in
*) &route
->addr
.src_addr
;
1802 dst4
= (struct sockaddr_in
*) &route
->addr
.dst_addr
;
1807 if (sdp_get_majv(sdp_hdr
->sdp_version
) != SDP_MAJ_VERSION
)
1809 sdp_set_ip_ver(sdp_hdr
, 4);
1810 sdp_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
1811 sdp_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
1812 sdp_hdr
->port
= src4
->sin_port
;
1816 cma_hdr
->cma_version
= CMA_VERSION
;
1817 cma_set_ip_ver(cma_hdr
, 4);
1818 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
1819 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
1820 cma_hdr
->port
= src4
->sin_port
;
1826 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
1827 struct rdma_conn_param
*conn_param
)
1829 struct ib_cm_req_param req
;
1830 struct rdma_route
*route
;
1834 memset(&req
, 0, sizeof req
);
1835 offset
= cma_user_data_offset(id_priv
->id
.ps
);
1836 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
1837 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
1841 if (conn_param
->private_data
&& conn_param
->private_data_len
)
1842 memcpy(private_data
+ offset
, conn_param
->private_data
,
1843 conn_param
->private_data_len
);
1845 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
,
1847 if (IS_ERR(id_priv
->cm_id
.ib
)) {
1848 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
1852 route
= &id_priv
->id
.route
;
1853 ret
= cma_format_hdr(private_data
, id_priv
->id
.ps
, route
);
1856 req
.private_data
= private_data
;
1858 req
.primary_path
= &route
->path_rec
[0];
1859 if (route
->num_paths
== 2)
1860 req
.alternate_path
= &route
->path_rec
[1];
1862 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
1863 &route
->addr
.dst_addr
);
1864 req
.qp_num
= id_priv
->qp_num
;
1865 req
.qp_type
= id_priv
->qp_type
;
1866 req
.starting_psn
= id_priv
->seq_num
;
1867 req
.responder_resources
= conn_param
->responder_resources
;
1868 req
.initiator_depth
= conn_param
->initiator_depth
;
1869 req
.flow_control
= conn_param
->flow_control
;
1870 req
.retry_count
= conn_param
->retry_count
;
1871 req
.rnr_retry_count
= conn_param
->rnr_retry_count
;
1872 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
1873 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
1874 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
1875 req
.srq
= id_priv
->srq
? 1 : 0;
1877 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
1879 if (ret
&& !IS_ERR(id_priv
->cm_id
.ib
)) {
1880 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1881 id_priv
->cm_id
.ib
= NULL
;
1884 kfree(private_data
);
1888 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
1889 struct rdma_conn_param
*conn_param
)
1891 struct iw_cm_id
*cm_id
;
1892 struct sockaddr_in
* sin
;
1894 struct iw_cm_conn_param iw_param
;
1896 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
1897 if (IS_ERR(cm_id
)) {
1898 ret
= PTR_ERR(cm_id
);
1902 id_priv
->cm_id
.iw
= cm_id
;
1904 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1905 cm_id
->local_addr
= *sin
;
1907 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1908 cm_id
->remote_addr
= *sin
;
1910 ret
= cma_modify_qp_rtr(&id_priv
->id
);
1914 iw_param
.ord
= conn_param
->initiator_depth
;
1915 iw_param
.ird
= conn_param
->responder_resources
;
1916 iw_param
.private_data
= conn_param
->private_data
;
1917 iw_param
.private_data_len
= conn_param
->private_data_len
;
1919 iw_param
.qpn
= id_priv
->qp_num
;
1921 iw_param
.qpn
= conn_param
->qp_num
;
1922 ret
= iw_cm_connect(cm_id
, &iw_param
);
1924 if (ret
&& !IS_ERR(cm_id
)) {
1925 iw_destroy_cm_id(cm_id
);
1926 id_priv
->cm_id
.iw
= NULL
;
1931 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
1933 struct rdma_id_private
*id_priv
;
1936 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1937 if (!cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_CONNECT
))
1941 id_priv
->qp_num
= conn_param
->qp_num
;
1942 id_priv
->qp_type
= conn_param
->qp_type
;
1943 id_priv
->srq
= conn_param
->srq
;
1946 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1947 case RDMA_TRANSPORT_IB
:
1948 ret
= cma_connect_ib(id_priv
, conn_param
);
1950 case RDMA_TRANSPORT_IWARP
:
1951 ret
= cma_connect_iw(id_priv
, conn_param
);
1962 cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_ROUTE_RESOLVED
);
1965 EXPORT_SYMBOL(rdma_connect
);
1967 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
1968 struct rdma_conn_param
*conn_param
)
1970 struct ib_cm_rep_param rep
;
1973 ret
= cma_modify_qp_rtr(&id_priv
->id
);
1977 memset(&rep
, 0, sizeof rep
);
1978 rep
.qp_num
= id_priv
->qp_num
;
1979 rep
.starting_psn
= id_priv
->seq_num
;
1980 rep
.private_data
= conn_param
->private_data
;
1981 rep
.private_data_len
= conn_param
->private_data_len
;
1982 rep
.responder_resources
= conn_param
->responder_resources
;
1983 rep
.initiator_depth
= conn_param
->initiator_depth
;
1984 rep
.target_ack_delay
= CMA_CM_RESPONSE_TIMEOUT
;
1985 rep
.failover_accepted
= 0;
1986 rep
.flow_control
= conn_param
->flow_control
;
1987 rep
.rnr_retry_count
= conn_param
->rnr_retry_count
;
1988 rep
.srq
= id_priv
->srq
? 1 : 0;
1990 return ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
1993 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
1994 struct rdma_conn_param
*conn_param
)
1996 struct iw_cm_conn_param iw_param
;
1999 ret
= cma_modify_qp_rtr(&id_priv
->id
);
2003 iw_param
.ord
= conn_param
->initiator_depth
;
2004 iw_param
.ird
= conn_param
->responder_resources
;
2005 iw_param
.private_data
= conn_param
->private_data
;
2006 iw_param
.private_data_len
= conn_param
->private_data_len
;
2007 if (id_priv
->id
.qp
) {
2008 iw_param
.qpn
= id_priv
->qp_num
;
2010 iw_param
.qpn
= conn_param
->qp_num
;
2012 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
2015 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2017 struct rdma_id_private
*id_priv
;
2020 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2021 if (!cma_comp(id_priv
, CMA_CONNECT
))
2024 if (!id
->qp
&& conn_param
) {
2025 id_priv
->qp_num
= conn_param
->qp_num
;
2026 id_priv
->qp_type
= conn_param
->qp_type
;
2027 id_priv
->srq
= conn_param
->srq
;
2030 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2031 case RDMA_TRANSPORT_IB
:
2033 ret
= cma_accept_ib(id_priv
, conn_param
);
2035 ret
= cma_rep_recv(id_priv
);
2037 case RDMA_TRANSPORT_IWARP
:
2038 ret
= cma_accept_iw(id_priv
, conn_param
);
2050 cma_modify_qp_err(id
);
2051 rdma_reject(id
, NULL
, 0);
2054 EXPORT_SYMBOL(rdma_accept
);
2056 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
2057 u8 private_data_len
)
2059 struct rdma_id_private
*id_priv
;
2062 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2063 if (!cma_comp(id_priv
, CMA_CONNECT
))
2066 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2067 case RDMA_TRANSPORT_IB
:
2068 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
2069 IB_CM_REJ_CONSUMER_DEFINED
, NULL
, 0,
2070 private_data
, private_data_len
);
2072 case RDMA_TRANSPORT_IWARP
:
2073 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
2074 private_data
, private_data_len
);
2082 EXPORT_SYMBOL(rdma_reject
);
2084 int rdma_disconnect(struct rdma_cm_id
*id
)
2086 struct rdma_id_private
*id_priv
;
2089 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2090 if (!cma_comp(id_priv
, CMA_CONNECT
) &&
2091 !cma_comp(id_priv
, CMA_DISCONNECT
))
2094 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2095 case RDMA_TRANSPORT_IB
:
2096 ret
= cma_modify_qp_err(id
);
2099 /* Initiate or respond to a disconnect. */
2100 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
2101 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
2103 case RDMA_TRANSPORT_IWARP
:
2104 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
2113 EXPORT_SYMBOL(rdma_disconnect
);
2115 static void cma_add_one(struct ib_device
*device
)
2117 struct cma_device
*cma_dev
;
2118 struct rdma_id_private
*id_priv
;
2120 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
2124 cma_dev
->device
= device
;
2125 cma_dev
->node_guid
= device
->node_guid
;
2126 if (!cma_dev
->node_guid
)
2129 init_completion(&cma_dev
->comp
);
2130 atomic_set(&cma_dev
->refcount
, 1);
2131 INIT_LIST_HEAD(&cma_dev
->id_list
);
2132 ib_set_client_data(device
, &cma_client
, cma_dev
);
2135 list_add_tail(&cma_dev
->list
, &dev_list
);
2136 list_for_each_entry(id_priv
, &listen_any_list
, list
)
2137 cma_listen_on_dev(id_priv
, cma_dev
);
2138 mutex_unlock(&lock
);
2144 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
2146 enum cma_state state
;
2148 /* Record that we want to remove the device */
2149 state
= cma_exch(id_priv
, CMA_DEVICE_REMOVAL
);
2150 if (state
== CMA_DESTROYING
)
2153 cma_cancel_operation(id_priv
, state
);
2154 wait_event(id_priv
->wait_remove
, !atomic_read(&id_priv
->dev_remove
));
2156 /* Check for destruction from another callback. */
2157 if (!cma_comp(id_priv
, CMA_DEVICE_REMOVAL
))
2160 return cma_notify_user(id_priv
, RDMA_CM_EVENT_DEVICE_REMOVAL
,
2164 static void cma_process_remove(struct cma_device
*cma_dev
)
2166 struct rdma_id_private
*id_priv
;
2170 while (!list_empty(&cma_dev
->id_list
)) {
2171 id_priv
= list_entry(cma_dev
->id_list
.next
,
2172 struct rdma_id_private
, list
);
2174 if (cma_internal_listen(id_priv
)) {
2175 cma_destroy_listen(id_priv
);
2179 list_del_init(&id_priv
->list
);
2180 atomic_inc(&id_priv
->refcount
);
2181 mutex_unlock(&lock
);
2183 ret
= cma_remove_id_dev(id_priv
);
2184 cma_deref_id(id_priv
);
2186 rdma_destroy_id(&id_priv
->id
);
2190 mutex_unlock(&lock
);
2192 cma_deref_dev(cma_dev
);
2193 wait_for_completion(&cma_dev
->comp
);
2196 static void cma_remove_one(struct ib_device
*device
)
2198 struct cma_device
*cma_dev
;
2200 cma_dev
= ib_get_client_data(device
, &cma_client
);
2205 list_del(&cma_dev
->list
);
2206 mutex_unlock(&lock
);
2208 cma_process_remove(cma_dev
);
2212 static int cma_init(void)
2216 cma_wq
= create_singlethread_workqueue("rdma_cm_wq");
2220 ib_sa_register_client(&sa_client
);
2221 rdma_addr_register_client(&addr_client
);
2223 ret
= ib_register_client(&cma_client
);
2229 rdma_addr_unregister_client(&addr_client
);
2230 ib_sa_unregister_client(&sa_client
);
2231 destroy_workqueue(cma_wq
);
2235 static void cma_cleanup(void)
2237 ib_unregister_client(&cma_client
);
2238 rdma_addr_unregister_client(&addr_client
);
2239 ib_sa_unregister_client(&sa_client
);
2240 destroy_workqueue(cma_wq
);
2241 idr_destroy(&sdp_ps
);
2242 idr_destroy(&tcp_ps
);
2245 module_init(cma_init
);
2246 module_exit(cma_cleanup
);