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 available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/completion.h>
38 #include <linux/in6.h>
39 #include <linux/mutex.h>
40 #include <linux/random.h>
41 #include <linux/idr.h>
42 #include <linux/inetdevice.h>
46 #include <rdma/rdma_cm.h>
47 #include <rdma/rdma_cm_ib.h>
48 #include <rdma/ib_cache.h>
49 #include <rdma/ib_cm.h>
50 #include <rdma/ib_sa.h>
51 #include <rdma/iw_cm.h>
53 MODULE_AUTHOR("Sean Hefty");
54 MODULE_DESCRIPTION("Generic RDMA CM Agent");
55 MODULE_LICENSE("Dual BSD/GPL");
57 #define CMA_CM_RESPONSE_TIMEOUT 20
58 #define CMA_MAX_CM_RETRIES 15
59 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
61 static void cma_add_one(struct ib_device
*device
);
62 static void cma_remove_one(struct ib_device
*device
);
64 static struct ib_client cma_client
= {
67 .remove
= cma_remove_one
70 static struct ib_sa_client sa_client
;
71 static struct rdma_addr_client addr_client
;
72 static LIST_HEAD(dev_list
);
73 static LIST_HEAD(listen_any_list
);
74 static DEFINE_MUTEX(lock
);
75 static struct workqueue_struct
*cma_wq
;
76 static DEFINE_IDR(sdp_ps
);
77 static DEFINE_IDR(tcp_ps
);
78 static DEFINE_IDR(udp_ps
);
79 static DEFINE_IDR(ipoib_ps
);
83 struct list_head list
;
84 struct ib_device
*device
;
85 struct completion comp
;
87 struct list_head id_list
;
104 struct rdma_bind_list
{
106 struct hlist_head owners
;
111 * Device removal can occur at anytime, so we need extra handling to
112 * serialize notifying the user of device removal with other callbacks.
113 * We do this by disabling removal notification while a callback is in process,
114 * and reporting it after the callback completes.
116 struct rdma_id_private
{
117 struct rdma_cm_id id
;
119 struct rdma_bind_list
*bind_list
;
120 struct hlist_node node
;
121 struct list_head list
; /* listen_any_list or cma_device.list */
122 struct list_head listen_list
; /* per device listens */
123 struct cma_device
*cma_dev
;
124 struct list_head mc_list
;
127 enum cma_state state
;
129 struct mutex qp_mutex
;
131 struct completion comp
;
133 struct mutex handler_mutex
;
137 struct ib_sa_query
*query
;
151 struct cma_multicast
{
152 struct rdma_id_private
*id_priv
;
154 struct ib_sa_multicast
*ib
;
156 struct list_head list
;
158 struct sockaddr addr
;
159 u8 pad
[sizeof(struct sockaddr_in6
) -
160 sizeof(struct sockaddr
)];
164 struct work_struct work
;
165 struct rdma_id_private
*id
;
166 enum cma_state old_state
;
167 enum cma_state new_state
;
168 struct rdma_cm_event event
;
181 u8 ip_version
; /* IP version: 7:4 */
183 union cma_ip_addr src_addr
;
184 union cma_ip_addr dst_addr
;
189 u8 sdp_version
; /* Major version: 7:4 */
190 u8 ip_version
; /* IP version: 7:4 */
191 u8 sdp_specific1
[10];
193 __be16 sdp_specific2
;
194 union cma_ip_addr src_addr
;
195 union cma_ip_addr dst_addr
;
203 #define CMA_VERSION 0x00
204 #define SDP_MAJ_VERSION 0x2
206 static int cma_comp(struct rdma_id_private
*id_priv
, enum cma_state comp
)
211 spin_lock_irqsave(&id_priv
->lock
, flags
);
212 ret
= (id_priv
->state
== comp
);
213 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
217 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
218 enum cma_state comp
, enum cma_state exch
)
223 spin_lock_irqsave(&id_priv
->lock
, flags
);
224 if ((ret
= (id_priv
->state
== comp
)))
225 id_priv
->state
= exch
;
226 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
230 static enum cma_state
cma_exch(struct rdma_id_private
*id_priv
,
236 spin_lock_irqsave(&id_priv
->lock
, flags
);
237 old
= id_priv
->state
;
238 id_priv
->state
= exch
;
239 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
243 static inline u8
cma_get_ip_ver(struct cma_hdr
*hdr
)
245 return hdr
->ip_version
>> 4;
248 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
250 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
253 static inline u8
sdp_get_majv(u8 sdp_version
)
255 return sdp_version
>> 4;
258 static inline u8
sdp_get_ip_ver(struct sdp_hh
*hh
)
260 return hh
->ip_version
>> 4;
263 static inline void sdp_set_ip_ver(struct sdp_hh
*hh
, u8 ip_ver
)
265 hh
->ip_version
= (ip_ver
<< 4) | (hh
->ip_version
& 0xF);
268 static inline int cma_is_ud_ps(enum rdma_port_space ps
)
270 return (ps
== RDMA_PS_UDP
|| ps
== RDMA_PS_IPOIB
);
273 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
274 struct cma_device
*cma_dev
)
276 atomic_inc(&cma_dev
->refcount
);
277 id_priv
->cma_dev
= cma_dev
;
278 id_priv
->id
.device
= cma_dev
->device
;
279 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
282 static inline void cma_deref_dev(struct cma_device
*cma_dev
)
284 if (atomic_dec_and_test(&cma_dev
->refcount
))
285 complete(&cma_dev
->comp
);
288 static void cma_detach_from_dev(struct rdma_id_private
*id_priv
)
290 list_del(&id_priv
->list
);
291 cma_deref_dev(id_priv
->cma_dev
);
292 id_priv
->cma_dev
= NULL
;
295 static int cma_set_qkey(struct ib_device
*device
, u8 port_num
,
296 enum rdma_port_space ps
,
297 struct rdma_dev_addr
*dev_addr
, u32
*qkey
)
299 struct ib_sa_mcmember_rec rec
;
304 *qkey
= RDMA_UDP_QKEY
;
307 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
308 ret
= ib_sa_get_mcmember_rec(device
, port_num
, &rec
.mgid
, &rec
);
309 *qkey
= be32_to_cpu(rec
.qkey
);
317 static int cma_acquire_dev(struct rdma_id_private
*id_priv
)
319 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
320 struct cma_device
*cma_dev
;
324 switch (rdma_node_get_transport(dev_addr
->dev_type
)) {
325 case RDMA_TRANSPORT_IB
:
326 ib_addr_get_sgid(dev_addr
, &gid
);
328 case RDMA_TRANSPORT_IWARP
:
329 iw_addr_get_sgid(dev_addr
, &gid
);
335 list_for_each_entry(cma_dev
, &dev_list
, list
) {
336 ret
= ib_find_cached_gid(cma_dev
->device
, &gid
,
337 &id_priv
->id
.port_num
, NULL
);
339 ret
= cma_set_qkey(cma_dev
->device
,
340 id_priv
->id
.port_num
,
341 id_priv
->id
.ps
, dev_addr
,
344 cma_attach_to_dev(id_priv
, cma_dev
);
351 static void cma_deref_id(struct rdma_id_private
*id_priv
)
353 if (atomic_dec_and_test(&id_priv
->refcount
))
354 complete(&id_priv
->comp
);
357 static int cma_disable_callback(struct rdma_id_private
*id_priv
,
358 enum cma_state state
)
360 mutex_lock(&id_priv
->handler_mutex
);
361 if (id_priv
->state
!= state
) {
362 mutex_unlock(&id_priv
->handler_mutex
);
368 static int cma_has_cm_dev(struct rdma_id_private
*id_priv
)
370 return (id_priv
->id
.device
&& id_priv
->cm_id
.ib
);
373 struct rdma_cm_id
*rdma_create_id(rdma_cm_event_handler event_handler
,
374 void *context
, enum rdma_port_space ps
)
376 struct rdma_id_private
*id_priv
;
378 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
380 return ERR_PTR(-ENOMEM
);
382 id_priv
->state
= CMA_IDLE
;
383 id_priv
->id
.context
= context
;
384 id_priv
->id
.event_handler
= event_handler
;
386 spin_lock_init(&id_priv
->lock
);
387 mutex_init(&id_priv
->qp_mutex
);
388 init_completion(&id_priv
->comp
);
389 atomic_set(&id_priv
->refcount
, 1);
390 mutex_init(&id_priv
->handler_mutex
);
391 INIT_LIST_HEAD(&id_priv
->listen_list
);
392 INIT_LIST_HEAD(&id_priv
->mc_list
);
393 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
397 EXPORT_SYMBOL(rdma_create_id
);
399 static int cma_init_ud_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
401 struct ib_qp_attr qp_attr
;
402 int qp_attr_mask
, ret
;
404 qp_attr
.qp_state
= IB_QPS_INIT
;
405 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
409 ret
= ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
413 qp_attr
.qp_state
= IB_QPS_RTR
;
414 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
);
418 qp_attr
.qp_state
= IB_QPS_RTS
;
420 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
425 static int cma_init_conn_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
427 struct ib_qp_attr qp_attr
;
428 int qp_attr_mask
, ret
;
430 qp_attr
.qp_state
= IB_QPS_INIT
;
431 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
435 return ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
438 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
439 struct ib_qp_init_attr
*qp_init_attr
)
441 struct rdma_id_private
*id_priv
;
445 id_priv
= container_of(id
, struct rdma_id_private
, id
);
446 if (id
->device
!= pd
->device
)
449 qp
= ib_create_qp(pd
, qp_init_attr
);
453 if (cma_is_ud_ps(id_priv
->id
.ps
))
454 ret
= cma_init_ud_qp(id_priv
, qp
);
456 ret
= cma_init_conn_qp(id_priv
, qp
);
461 id_priv
->qp_num
= qp
->qp_num
;
462 id_priv
->srq
= (qp
->srq
!= NULL
);
468 EXPORT_SYMBOL(rdma_create_qp
);
470 void rdma_destroy_qp(struct rdma_cm_id
*id
)
472 struct rdma_id_private
*id_priv
;
474 id_priv
= container_of(id
, struct rdma_id_private
, id
);
475 mutex_lock(&id_priv
->qp_mutex
);
476 ib_destroy_qp(id_priv
->id
.qp
);
477 id_priv
->id
.qp
= NULL
;
478 mutex_unlock(&id_priv
->qp_mutex
);
480 EXPORT_SYMBOL(rdma_destroy_qp
);
482 static int cma_modify_qp_rtr(struct rdma_id_private
*id_priv
,
483 struct rdma_conn_param
*conn_param
)
485 struct ib_qp_attr qp_attr
;
486 int qp_attr_mask
, ret
;
488 mutex_lock(&id_priv
->qp_mutex
);
489 if (!id_priv
->id
.qp
) {
494 /* Need to update QP attributes from default values. */
495 qp_attr
.qp_state
= IB_QPS_INIT
;
496 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
500 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
504 qp_attr
.qp_state
= IB_QPS_RTR
;
505 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
510 qp_attr
.max_dest_rd_atomic
= conn_param
->responder_resources
;
511 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
513 mutex_unlock(&id_priv
->qp_mutex
);
517 static int cma_modify_qp_rts(struct rdma_id_private
*id_priv
,
518 struct rdma_conn_param
*conn_param
)
520 struct ib_qp_attr qp_attr
;
521 int qp_attr_mask
, ret
;
523 mutex_lock(&id_priv
->qp_mutex
);
524 if (!id_priv
->id
.qp
) {
529 qp_attr
.qp_state
= IB_QPS_RTS
;
530 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
535 qp_attr
.max_rd_atomic
= conn_param
->initiator_depth
;
536 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
538 mutex_unlock(&id_priv
->qp_mutex
);
542 static int cma_modify_qp_err(struct rdma_id_private
*id_priv
)
544 struct ib_qp_attr qp_attr
;
547 mutex_lock(&id_priv
->qp_mutex
);
548 if (!id_priv
->id
.qp
) {
553 qp_attr
.qp_state
= IB_QPS_ERR
;
554 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, IB_QP_STATE
);
556 mutex_unlock(&id_priv
->qp_mutex
);
560 static int cma_ib_init_qp_attr(struct rdma_id_private
*id_priv
,
561 struct ib_qp_attr
*qp_attr
, int *qp_attr_mask
)
563 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
566 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
567 ib_addr_get_pkey(dev_addr
),
568 &qp_attr
->pkey_index
);
572 qp_attr
->port_num
= id_priv
->id
.port_num
;
573 *qp_attr_mask
= IB_QP_STATE
| IB_QP_PKEY_INDEX
| IB_QP_PORT
;
575 if (cma_is_ud_ps(id_priv
->id
.ps
)) {
576 qp_attr
->qkey
= id_priv
->qkey
;
577 *qp_attr_mask
|= IB_QP_QKEY
;
579 qp_attr
->qp_access_flags
= 0;
580 *qp_attr_mask
|= IB_QP_ACCESS_FLAGS
;
585 int rdma_init_qp_attr(struct rdma_cm_id
*id
, struct ib_qp_attr
*qp_attr
,
588 struct rdma_id_private
*id_priv
;
591 id_priv
= container_of(id
, struct rdma_id_private
, id
);
592 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
593 case RDMA_TRANSPORT_IB
:
594 if (!id_priv
->cm_id
.ib
|| cma_is_ud_ps(id_priv
->id
.ps
))
595 ret
= cma_ib_init_qp_attr(id_priv
, qp_attr
, qp_attr_mask
);
597 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, qp_attr
,
599 if (qp_attr
->qp_state
== IB_QPS_RTR
)
600 qp_attr
->rq_psn
= id_priv
->seq_num
;
602 case RDMA_TRANSPORT_IWARP
:
603 if (!id_priv
->cm_id
.iw
) {
604 qp_attr
->qp_access_flags
= 0;
605 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
;
607 ret
= iw_cm_init_qp_attr(id_priv
->cm_id
.iw
, qp_attr
,
617 EXPORT_SYMBOL(rdma_init_qp_attr
);
619 static inline int cma_zero_addr(struct sockaddr
*addr
)
621 struct in6_addr
*ip6
;
623 if (addr
->sa_family
== AF_INET
)
624 return ipv4_is_zeronet(
625 ((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
);
627 ip6
= &((struct sockaddr_in6
*) addr
)->sin6_addr
;
628 return (ip6
->s6_addr32
[0] | ip6
->s6_addr32
[1] |
629 ip6
->s6_addr32
[2] | ip6
->s6_addr32
[3]) == 0;
633 static inline int cma_loopback_addr(struct sockaddr
*addr
)
635 return ipv4_is_loopback(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
638 static inline int cma_any_addr(struct sockaddr
*addr
)
640 return cma_zero_addr(addr
) || cma_loopback_addr(addr
);
643 static inline __be16
cma_port(struct sockaddr
*addr
)
645 if (addr
->sa_family
== AF_INET
)
646 return ((struct sockaddr_in
*) addr
)->sin_port
;
648 return ((struct sockaddr_in6
*) addr
)->sin6_port
;
651 static inline int cma_any_port(struct sockaddr
*addr
)
653 return !cma_port(addr
);
656 static int cma_get_net_info(void *hdr
, enum rdma_port_space ps
,
657 u8
*ip_ver
, __be16
*port
,
658 union cma_ip_addr
**src
, union cma_ip_addr
**dst
)
662 if (sdp_get_majv(((struct sdp_hh
*) hdr
)->sdp_version
) !=
666 *ip_ver
= sdp_get_ip_ver(hdr
);
667 *port
= ((struct sdp_hh
*) hdr
)->port
;
668 *src
= &((struct sdp_hh
*) hdr
)->src_addr
;
669 *dst
= &((struct sdp_hh
*) hdr
)->dst_addr
;
672 if (((struct cma_hdr
*) hdr
)->cma_version
!= CMA_VERSION
)
675 *ip_ver
= cma_get_ip_ver(hdr
);
676 *port
= ((struct cma_hdr
*) hdr
)->port
;
677 *src
= &((struct cma_hdr
*) hdr
)->src_addr
;
678 *dst
= &((struct cma_hdr
*) hdr
)->dst_addr
;
682 if (*ip_ver
!= 4 && *ip_ver
!= 6)
687 static void cma_save_net_info(struct rdma_addr
*addr
,
688 struct rdma_addr
*listen_addr
,
689 u8 ip_ver
, __be16 port
,
690 union cma_ip_addr
*src
, union cma_ip_addr
*dst
)
692 struct sockaddr_in
*listen4
, *ip4
;
693 struct sockaddr_in6
*listen6
, *ip6
;
697 listen4
= (struct sockaddr_in
*) &listen_addr
->src_addr
;
698 ip4
= (struct sockaddr_in
*) &addr
->src_addr
;
699 ip4
->sin_family
= listen4
->sin_family
;
700 ip4
->sin_addr
.s_addr
= dst
->ip4
.addr
;
701 ip4
->sin_port
= listen4
->sin_port
;
703 ip4
= (struct sockaddr_in
*) &addr
->dst_addr
;
704 ip4
->sin_family
= listen4
->sin_family
;
705 ip4
->sin_addr
.s_addr
= src
->ip4
.addr
;
706 ip4
->sin_port
= port
;
709 listen6
= (struct sockaddr_in6
*) &listen_addr
->src_addr
;
710 ip6
= (struct sockaddr_in6
*) &addr
->src_addr
;
711 ip6
->sin6_family
= listen6
->sin6_family
;
712 ip6
->sin6_addr
= dst
->ip6
;
713 ip6
->sin6_port
= listen6
->sin6_port
;
715 ip6
= (struct sockaddr_in6
*) &addr
->dst_addr
;
716 ip6
->sin6_family
= listen6
->sin6_family
;
717 ip6
->sin6_addr
= src
->ip6
;
718 ip6
->sin6_port
= port
;
725 static inline int cma_user_data_offset(enum rdma_port_space ps
)
731 return sizeof(struct cma_hdr
);
735 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
737 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
738 case RDMA_TRANSPORT_IB
:
740 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
747 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
749 struct rdma_id_private
*dev_id_priv
;
752 * Remove from listen_any_list to prevent added devices from spawning
753 * additional listen requests.
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 /* sync with device removal to avoid duplicate destruction */
762 list_del_init(&dev_id_priv
->list
);
763 list_del(&dev_id_priv
->listen_list
);
766 rdma_destroy_id(&dev_id_priv
->id
);
772 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
773 enum cma_state state
)
777 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
779 case CMA_ROUTE_QUERY
:
780 cma_cancel_route(id_priv
);
783 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
) &&
785 cma_cancel_listens(id_priv
);
792 static void cma_release_port(struct rdma_id_private
*id_priv
)
794 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
800 hlist_del(&id_priv
->node
);
801 if (hlist_empty(&bind_list
->owners
)) {
802 idr_remove(bind_list
->ps
, bind_list
->port
);
808 static void cma_leave_mc_groups(struct rdma_id_private
*id_priv
)
810 struct cma_multicast
*mc
;
812 while (!list_empty(&id_priv
->mc_list
)) {
813 mc
= container_of(id_priv
->mc_list
.next
,
814 struct cma_multicast
, list
);
816 ib_sa_free_multicast(mc
->multicast
.ib
);
821 void rdma_destroy_id(struct rdma_cm_id
*id
)
823 struct rdma_id_private
*id_priv
;
824 enum cma_state state
;
826 id_priv
= container_of(id
, struct rdma_id_private
, id
);
827 state
= cma_exch(id_priv
, CMA_DESTROYING
);
828 cma_cancel_operation(id_priv
, state
);
831 if (id_priv
->cma_dev
) {
833 switch (rdma_node_get_transport(id
->device
->node_type
)) {
834 case RDMA_TRANSPORT_IB
:
835 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
836 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
838 case RDMA_TRANSPORT_IWARP
:
839 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
840 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
845 cma_leave_mc_groups(id_priv
);
847 cma_detach_from_dev(id_priv
);
851 cma_release_port(id_priv
);
852 cma_deref_id(id_priv
);
853 wait_for_completion(&id_priv
->comp
);
855 if (id_priv
->internal_id
)
856 cma_deref_id(id_priv
->id
.context
);
858 kfree(id_priv
->id
.route
.path_rec
);
861 EXPORT_SYMBOL(rdma_destroy_id
);
863 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
867 ret
= cma_modify_qp_rtr(id_priv
, NULL
);
871 ret
= cma_modify_qp_rts(id_priv
, NULL
);
875 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
881 cma_modify_qp_err(id_priv
);
882 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
887 static int cma_verify_rep(struct rdma_id_private
*id_priv
, void *data
)
889 if (id_priv
->id
.ps
== RDMA_PS_SDP
&&
890 sdp_get_majv(((struct sdp_hah
*) data
)->sdp_version
) !=
897 static void cma_set_rep_event_data(struct rdma_cm_event
*event
,
898 struct ib_cm_rep_event_param
*rep_data
,
901 event
->param
.conn
.private_data
= private_data
;
902 event
->param
.conn
.private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
903 event
->param
.conn
.responder_resources
= rep_data
->responder_resources
;
904 event
->param
.conn
.initiator_depth
= rep_data
->initiator_depth
;
905 event
->param
.conn
.flow_control
= rep_data
->flow_control
;
906 event
->param
.conn
.rnr_retry_count
= rep_data
->rnr_retry_count
;
907 event
->param
.conn
.srq
= rep_data
->srq
;
908 event
->param
.conn
.qp_num
= rep_data
->remote_qpn
;
911 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
913 struct rdma_id_private
*id_priv
= cm_id
->context
;
914 struct rdma_cm_event event
;
917 if (cma_disable_callback(id_priv
, CMA_CONNECT
))
920 memset(&event
, 0, sizeof event
);
921 switch (ib_event
->event
) {
922 case IB_CM_REQ_ERROR
:
923 case IB_CM_REP_ERROR
:
924 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
925 event
.status
= -ETIMEDOUT
;
927 case IB_CM_REP_RECEIVED
:
928 event
.status
= cma_verify_rep(id_priv
, ib_event
->private_data
);
930 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
931 else if (id_priv
->id
.qp
&& id_priv
->id
.ps
!= RDMA_PS_SDP
) {
932 event
.status
= cma_rep_recv(id_priv
);
933 event
.event
= event
.status
? RDMA_CM_EVENT_CONNECT_ERROR
:
934 RDMA_CM_EVENT_ESTABLISHED
;
936 event
.event
= RDMA_CM_EVENT_CONNECT_RESPONSE
;
937 cma_set_rep_event_data(&event
, &ib_event
->param
.rep_rcvd
,
938 ib_event
->private_data
);
940 case IB_CM_RTU_RECEIVED
:
941 case IB_CM_USER_ESTABLISHED
:
942 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
944 case IB_CM_DREQ_ERROR
:
945 event
.status
= -ETIMEDOUT
; /* fall through */
946 case IB_CM_DREQ_RECEIVED
:
947 case IB_CM_DREP_RECEIVED
:
948 if (!cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_DISCONNECT
))
950 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
952 case IB_CM_TIMEWAIT_EXIT
:
953 case IB_CM_MRA_RECEIVED
:
956 case IB_CM_REJ_RECEIVED
:
957 cma_modify_qp_err(id_priv
);
958 event
.status
= ib_event
->param
.rej_rcvd
.reason
;
959 event
.event
= RDMA_CM_EVENT_REJECTED
;
960 event
.param
.conn
.private_data
= ib_event
->private_data
;
961 event
.param
.conn
.private_data_len
= IB_CM_REJ_PRIVATE_DATA_SIZE
;
964 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d\n",
969 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
971 /* Destroy the CM ID by returning a non-zero value. */
972 id_priv
->cm_id
.ib
= NULL
;
973 cma_exch(id_priv
, CMA_DESTROYING
);
974 mutex_unlock(&id_priv
->handler_mutex
);
975 rdma_destroy_id(&id_priv
->id
);
979 mutex_unlock(&id_priv
->handler_mutex
);
983 static struct rdma_id_private
*cma_new_conn_id(struct rdma_cm_id
*listen_id
,
984 struct ib_cm_event
*ib_event
)
986 struct rdma_id_private
*id_priv
;
987 struct rdma_cm_id
*id
;
988 struct rdma_route
*rt
;
989 union cma_ip_addr
*src
, *dst
;
994 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
995 &ip_ver
, &port
, &src
, &dst
))
998 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
1003 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
1004 ip_ver
, port
, src
, dst
);
1007 rt
->num_paths
= ib_event
->param
.req_rcvd
.alternate_path
? 2 : 1;
1008 rt
->path_rec
= kmalloc(sizeof *rt
->path_rec
* rt
->num_paths
,
1013 rt
->path_rec
[0] = *ib_event
->param
.req_rcvd
.primary_path
;
1014 if (rt
->num_paths
== 2)
1015 rt
->path_rec
[1] = *ib_event
->param
.req_rcvd
.alternate_path
;
1017 ib_addr_set_dgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].dgid
);
1018 ret
= rdma_translate_ip(&id
->route
.addr
.src_addr
,
1019 &id
->route
.addr
.dev_addr
);
1023 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1024 id_priv
->state
= CMA_CONNECT
;
1028 rdma_destroy_id(id
);
1033 static struct rdma_id_private
*cma_new_udp_id(struct rdma_cm_id
*listen_id
,
1034 struct ib_cm_event
*ib_event
)
1036 struct rdma_id_private
*id_priv
;
1037 struct rdma_cm_id
*id
;
1038 union cma_ip_addr
*src
, *dst
;
1043 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
1049 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
1050 &ip_ver
, &port
, &src
, &dst
))
1053 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
1054 ip_ver
, port
, src
, dst
);
1056 ret
= rdma_translate_ip(&id
->route
.addr
.src_addr
,
1057 &id
->route
.addr
.dev_addr
);
1061 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1062 id_priv
->state
= CMA_CONNECT
;
1065 rdma_destroy_id(id
);
1069 static void cma_set_req_event_data(struct rdma_cm_event
*event
,
1070 struct ib_cm_req_event_param
*req_data
,
1071 void *private_data
, int offset
)
1073 event
->param
.conn
.private_data
= private_data
+ offset
;
1074 event
->param
.conn
.private_data_len
= IB_CM_REQ_PRIVATE_DATA_SIZE
- offset
;
1075 event
->param
.conn
.responder_resources
= req_data
->responder_resources
;
1076 event
->param
.conn
.initiator_depth
= req_data
->initiator_depth
;
1077 event
->param
.conn
.flow_control
= req_data
->flow_control
;
1078 event
->param
.conn
.retry_count
= req_data
->retry_count
;
1079 event
->param
.conn
.rnr_retry_count
= req_data
->rnr_retry_count
;
1080 event
->param
.conn
.srq
= req_data
->srq
;
1081 event
->param
.conn
.qp_num
= req_data
->remote_qpn
;
1084 static int cma_req_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
1086 struct rdma_id_private
*listen_id
, *conn_id
;
1087 struct rdma_cm_event event
;
1090 listen_id
= cm_id
->context
;
1091 if (cma_disable_callback(listen_id
, CMA_LISTEN
))
1092 return -ECONNABORTED
;
1094 memset(&event
, 0, sizeof event
);
1095 offset
= cma_user_data_offset(listen_id
->id
.ps
);
1096 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1097 if (cma_is_ud_ps(listen_id
->id
.ps
)) {
1098 conn_id
= cma_new_udp_id(&listen_id
->id
, ib_event
);
1099 event
.param
.ud
.private_data
= ib_event
->private_data
+ offset
;
1100 event
.param
.ud
.private_data_len
=
1101 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
- offset
;
1103 conn_id
= cma_new_conn_id(&listen_id
->id
, ib_event
);
1104 cma_set_req_event_data(&event
, &ib_event
->param
.req_rcvd
,
1105 ib_event
->private_data
, offset
);
1112 mutex_lock_nested(&conn_id
->handler_mutex
, SINGLE_DEPTH_NESTING
);
1114 ret
= cma_acquire_dev(conn_id
);
1115 mutex_unlock(&lock
);
1117 goto release_conn_id
;
1119 conn_id
->cm_id
.ib
= cm_id
;
1120 cm_id
->context
= conn_id
;
1121 cm_id
->cm_handler
= cma_ib_handler
;
1123 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1126 * Acquire mutex to prevent user executing rdma_destroy_id()
1127 * while we're accessing the cm_id.
1130 if (cma_comp(conn_id
, CMA_CONNECT
) &&
1131 !cma_is_ud_ps(conn_id
->id
.ps
))
1132 ib_send_cm_mra(cm_id
, CMA_CM_MRA_SETTING
, NULL
, 0);
1133 mutex_unlock(&lock
);
1134 mutex_unlock(&conn_id
->handler_mutex
);
1138 /* Destroy the CM ID by returning a non-zero value. */
1139 conn_id
->cm_id
.ib
= NULL
;
1142 cma_exch(conn_id
, CMA_DESTROYING
);
1143 mutex_unlock(&conn_id
->handler_mutex
);
1144 rdma_destroy_id(&conn_id
->id
);
1147 mutex_unlock(&listen_id
->handler_mutex
);
1151 static __be64
cma_get_service_id(enum rdma_port_space ps
, struct sockaddr
*addr
)
1153 return cpu_to_be64(((u64
)ps
<< 16) + be16_to_cpu(cma_port(addr
)));
1156 static void cma_set_compare_data(enum rdma_port_space ps
, struct sockaddr
*addr
,
1157 struct ib_cm_compare_data
*compare
)
1159 struct cma_hdr
*cma_data
, *cma_mask
;
1160 struct sdp_hh
*sdp_data
, *sdp_mask
;
1162 struct in6_addr ip6_addr
;
1164 memset(compare
, 0, sizeof *compare
);
1165 cma_data
= (void *) compare
->data
;
1166 cma_mask
= (void *) compare
->mask
;
1167 sdp_data
= (void *) compare
->data
;
1168 sdp_mask
= (void *) compare
->mask
;
1170 switch (addr
->sa_family
) {
1172 ip4_addr
= ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
;
1173 if (ps
== RDMA_PS_SDP
) {
1174 sdp_set_ip_ver(sdp_data
, 4);
1175 sdp_set_ip_ver(sdp_mask
, 0xF);
1176 sdp_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1177 sdp_mask
->dst_addr
.ip4
.addr
= htonl(~0);
1179 cma_set_ip_ver(cma_data
, 4);
1180 cma_set_ip_ver(cma_mask
, 0xF);
1181 cma_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1182 cma_mask
->dst_addr
.ip4
.addr
= htonl(~0);
1186 ip6_addr
= ((struct sockaddr_in6
*) addr
)->sin6_addr
;
1187 if (ps
== RDMA_PS_SDP
) {
1188 sdp_set_ip_ver(sdp_data
, 6);
1189 sdp_set_ip_ver(sdp_mask
, 0xF);
1190 sdp_data
->dst_addr
.ip6
= ip6_addr
;
1191 memset(&sdp_mask
->dst_addr
.ip6
, 0xFF,
1192 sizeof sdp_mask
->dst_addr
.ip6
);
1194 cma_set_ip_ver(cma_data
, 6);
1195 cma_set_ip_ver(cma_mask
, 0xF);
1196 cma_data
->dst_addr
.ip6
= ip6_addr
;
1197 memset(&cma_mask
->dst_addr
.ip6
, 0xFF,
1198 sizeof cma_mask
->dst_addr
.ip6
);
1206 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1208 struct rdma_id_private
*id_priv
= iw_id
->context
;
1209 struct rdma_cm_event event
;
1210 struct sockaddr_in
*sin
;
1213 if (cma_disable_callback(id_priv
, CMA_CONNECT
))
1216 memset(&event
, 0, sizeof event
);
1217 switch (iw_event
->event
) {
1218 case IW_CM_EVENT_CLOSE
:
1219 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
1221 case IW_CM_EVENT_CONNECT_REPLY
:
1222 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1223 *sin
= iw_event
->local_addr
;
1224 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1225 *sin
= iw_event
->remote_addr
;
1226 switch (iw_event
->status
) {
1228 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1232 event
.event
= RDMA_CM_EVENT_REJECTED
;
1235 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1238 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
1242 case IW_CM_EVENT_ESTABLISHED
:
1243 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1249 event
.status
= iw_event
->status
;
1250 event
.param
.conn
.private_data
= iw_event
->private_data
;
1251 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1252 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
1254 /* Destroy the CM ID by returning a non-zero value. */
1255 id_priv
->cm_id
.iw
= NULL
;
1256 cma_exch(id_priv
, CMA_DESTROYING
);
1257 mutex_unlock(&id_priv
->handler_mutex
);
1258 rdma_destroy_id(&id_priv
->id
);
1262 mutex_unlock(&id_priv
->handler_mutex
);
1266 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
1267 struct iw_cm_event
*iw_event
)
1269 struct rdma_cm_id
*new_cm_id
;
1270 struct rdma_id_private
*listen_id
, *conn_id
;
1271 struct sockaddr_in
*sin
;
1272 struct net_device
*dev
= NULL
;
1273 struct rdma_cm_event event
;
1275 struct ib_device_attr attr
;
1277 listen_id
= cm_id
->context
;
1278 if (cma_disable_callback(listen_id
, CMA_LISTEN
))
1279 return -ECONNABORTED
;
1281 /* Create a new RDMA id for the new IW CM ID */
1282 new_cm_id
= rdma_create_id(listen_id
->id
.event_handler
,
1283 listen_id
->id
.context
,
1285 if (IS_ERR(new_cm_id
)) {
1289 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
1290 mutex_lock_nested(&conn_id
->handler_mutex
, SINGLE_DEPTH_NESTING
);
1291 conn_id
->state
= CMA_CONNECT
;
1293 dev
= ip_dev_find(&init_net
, iw_event
->local_addr
.sin_addr
.s_addr
);
1295 ret
= -EADDRNOTAVAIL
;
1296 mutex_unlock(&conn_id
->handler_mutex
);
1297 rdma_destroy_id(new_cm_id
);
1300 ret
= rdma_copy_addr(&conn_id
->id
.route
.addr
.dev_addr
, dev
, NULL
);
1302 mutex_unlock(&conn_id
->handler_mutex
);
1303 rdma_destroy_id(new_cm_id
);
1308 ret
= cma_acquire_dev(conn_id
);
1309 mutex_unlock(&lock
);
1311 mutex_unlock(&conn_id
->handler_mutex
);
1312 rdma_destroy_id(new_cm_id
);
1316 conn_id
->cm_id
.iw
= cm_id
;
1317 cm_id
->context
= conn_id
;
1318 cm_id
->cm_handler
= cma_iw_handler
;
1320 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.src_addr
;
1321 *sin
= iw_event
->local_addr
;
1322 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.dst_addr
;
1323 *sin
= iw_event
->remote_addr
;
1325 ret
= ib_query_device(conn_id
->id
.device
, &attr
);
1327 mutex_unlock(&conn_id
->handler_mutex
);
1328 rdma_destroy_id(new_cm_id
);
1332 memset(&event
, 0, sizeof event
);
1333 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1334 event
.param
.conn
.private_data
= iw_event
->private_data
;
1335 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1336 event
.param
.conn
.initiator_depth
= attr
.max_qp_init_rd_atom
;
1337 event
.param
.conn
.responder_resources
= attr
.max_qp_rd_atom
;
1338 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1340 /* User wants to destroy the CM ID */
1341 conn_id
->cm_id
.iw
= NULL
;
1342 cma_exch(conn_id
, CMA_DESTROYING
);
1343 mutex_unlock(&conn_id
->handler_mutex
);
1344 rdma_destroy_id(&conn_id
->id
);
1348 mutex_unlock(&conn_id
->handler_mutex
);
1353 mutex_unlock(&listen_id
->handler_mutex
);
1357 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
1359 struct ib_cm_compare_data compare_data
;
1360 struct sockaddr
*addr
;
1364 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_req_handler
,
1366 if (IS_ERR(id_priv
->cm_id
.ib
))
1367 return PTR_ERR(id_priv
->cm_id
.ib
);
1369 addr
= &id_priv
->id
.route
.addr
.src_addr
;
1370 svc_id
= cma_get_service_id(id_priv
->id
.ps
, addr
);
1371 if (cma_any_addr(addr
))
1372 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, NULL
);
1374 cma_set_compare_data(id_priv
->id
.ps
, addr
, &compare_data
);
1375 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, &compare_data
);
1379 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1380 id_priv
->cm_id
.ib
= NULL
;
1386 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
1389 struct sockaddr_in
*sin
;
1391 id_priv
->cm_id
.iw
= iw_create_cm_id(id_priv
->id
.device
,
1392 iw_conn_req_handler
,
1394 if (IS_ERR(id_priv
->cm_id
.iw
))
1395 return PTR_ERR(id_priv
->cm_id
.iw
);
1397 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1398 id_priv
->cm_id
.iw
->local_addr
= *sin
;
1400 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
1403 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1404 id_priv
->cm_id
.iw
= NULL
;
1410 static int cma_listen_handler(struct rdma_cm_id
*id
,
1411 struct rdma_cm_event
*event
)
1413 struct rdma_id_private
*id_priv
= id
->context
;
1415 id
->context
= id_priv
->id
.context
;
1416 id
->event_handler
= id_priv
->id
.event_handler
;
1417 return id_priv
->id
.event_handler(id
, event
);
1420 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
1421 struct cma_device
*cma_dev
)
1423 struct rdma_id_private
*dev_id_priv
;
1424 struct rdma_cm_id
*id
;
1427 id
= rdma_create_id(cma_listen_handler
, id_priv
, id_priv
->id
.ps
);
1431 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
1433 dev_id_priv
->state
= CMA_ADDR_BOUND
;
1434 memcpy(&id
->route
.addr
.src_addr
, &id_priv
->id
.route
.addr
.src_addr
,
1435 ip_addr_size(&id_priv
->id
.route
.addr
.src_addr
));
1437 cma_attach_to_dev(dev_id_priv
, cma_dev
);
1438 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
1439 atomic_inc(&id_priv
->refcount
);
1440 dev_id_priv
->internal_id
= 1;
1442 ret
= rdma_listen(id
, id_priv
->backlog
);
1444 printk(KERN_WARNING
"RDMA CMA: cma_listen_on_dev, error %d, "
1445 "listening on device %s\n", ret
, cma_dev
->device
->name
);
1448 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
1450 struct cma_device
*cma_dev
;
1453 list_add_tail(&id_priv
->list
, &listen_any_list
);
1454 list_for_each_entry(cma_dev
, &dev_list
, list
)
1455 cma_listen_on_dev(id_priv
, cma_dev
);
1456 mutex_unlock(&lock
);
1459 static int cma_bind_any(struct rdma_cm_id
*id
, sa_family_t af
)
1461 struct sockaddr_in addr_in
;
1463 memset(&addr_in
, 0, sizeof addr_in
);
1464 addr_in
.sin_family
= af
;
1465 return rdma_bind_addr(id
, (struct sockaddr
*) &addr_in
);
1468 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
1470 struct rdma_id_private
*id_priv
;
1473 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1474 if (id_priv
->state
== CMA_IDLE
) {
1475 ret
= cma_bind_any(id
, AF_INET
);
1480 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_LISTEN
))
1483 id_priv
->backlog
= backlog
;
1485 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1486 case RDMA_TRANSPORT_IB
:
1487 ret
= cma_ib_listen(id_priv
);
1491 case RDMA_TRANSPORT_IWARP
:
1492 ret
= cma_iw_listen(id_priv
, backlog
);
1501 cma_listen_on_all(id_priv
);
1505 id_priv
->backlog
= 0;
1506 cma_comp_exch(id_priv
, CMA_LISTEN
, CMA_ADDR_BOUND
);
1509 EXPORT_SYMBOL(rdma_listen
);
1511 void rdma_set_service_type(struct rdma_cm_id
*id
, int tos
)
1513 struct rdma_id_private
*id_priv
;
1515 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1516 id_priv
->tos
= (u8
) tos
;
1518 EXPORT_SYMBOL(rdma_set_service_type
);
1520 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
1523 struct cma_work
*work
= context
;
1524 struct rdma_route
*route
;
1526 route
= &work
->id
->id
.route
;
1529 route
->num_paths
= 1;
1530 *route
->path_rec
= *path_rec
;
1532 work
->old_state
= CMA_ROUTE_QUERY
;
1533 work
->new_state
= CMA_ADDR_RESOLVED
;
1534 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
1535 work
->event
.status
= status
;
1538 queue_work(cma_wq
, &work
->work
);
1541 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
1542 struct cma_work
*work
)
1544 struct rdma_addr
*addr
= &id_priv
->id
.route
.addr
;
1545 struct ib_sa_path_rec path_rec
;
1546 ib_sa_comp_mask comp_mask
;
1547 struct sockaddr_in6
*sin6
;
1549 memset(&path_rec
, 0, sizeof path_rec
);
1550 ib_addr_get_sgid(&addr
->dev_addr
, &path_rec
.sgid
);
1551 ib_addr_get_dgid(&addr
->dev_addr
, &path_rec
.dgid
);
1552 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(&addr
->dev_addr
));
1553 path_rec
.numb_path
= 1;
1554 path_rec
.reversible
= 1;
1555 path_rec
.service_id
= cma_get_service_id(id_priv
->id
.ps
, &addr
->dst_addr
);
1557 comp_mask
= IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
1558 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
|
1559 IB_SA_PATH_REC_REVERSIBLE
| IB_SA_PATH_REC_SERVICE_ID
;
1561 if (addr
->src_addr
.sa_family
== AF_INET
) {
1562 path_rec
.qos_class
= cpu_to_be16((u16
) id_priv
->tos
);
1563 comp_mask
|= IB_SA_PATH_REC_QOS_CLASS
;
1565 sin6
= (struct sockaddr_in6
*) &addr
->src_addr
;
1566 path_rec
.traffic_class
= (u8
) (be32_to_cpu(sin6
->sin6_flowinfo
) >> 20);
1567 comp_mask
|= IB_SA_PATH_REC_TRAFFIC_CLASS
;
1570 id_priv
->query_id
= ib_sa_path_rec_get(&sa_client
, id_priv
->id
.device
,
1571 id_priv
->id
.port_num
, &path_rec
,
1572 comp_mask
, timeout_ms
,
1573 GFP_KERNEL
, cma_query_handler
,
1574 work
, &id_priv
->query
);
1576 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
1579 static void cma_work_handler(struct work_struct
*_work
)
1581 struct cma_work
*work
= container_of(_work
, struct cma_work
, work
);
1582 struct rdma_id_private
*id_priv
= work
->id
;
1585 mutex_lock(&id_priv
->handler_mutex
);
1586 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
1589 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
1590 cma_exch(id_priv
, CMA_DESTROYING
);
1594 mutex_unlock(&id_priv
->handler_mutex
);
1595 cma_deref_id(id_priv
);
1597 rdma_destroy_id(&id_priv
->id
);
1601 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1603 struct rdma_route
*route
= &id_priv
->id
.route
;
1604 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
;
1617 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
1618 if (!route
->path_rec
) {
1623 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
1629 kfree(route
->path_rec
);
1630 route
->path_rec
= NULL
;
1636 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
1637 struct ib_sa_path_rec
*path_rec
, int num_paths
)
1639 struct rdma_id_private
*id_priv
;
1642 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1643 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_RESOLVED
))
1646 id
->route
.path_rec
= kmalloc(sizeof *path_rec
* num_paths
, GFP_KERNEL
);
1647 if (!id
->route
.path_rec
) {
1652 memcpy(id
->route
.path_rec
, path_rec
, sizeof *path_rec
* num_paths
);
1655 cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_ADDR_RESOLVED
);
1658 EXPORT_SYMBOL(rdma_set_ib_paths
);
1660 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1662 struct cma_work
*work
;
1664 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1669 INIT_WORK(&work
->work
, cma_work_handler
);
1670 work
->old_state
= CMA_ROUTE_QUERY
;
1671 work
->new_state
= CMA_ROUTE_RESOLVED
;
1672 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1673 queue_work(cma_wq
, &work
->work
);
1677 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
1679 struct rdma_id_private
*id_priv
;
1682 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1683 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_QUERY
))
1686 atomic_inc(&id_priv
->refcount
);
1687 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1688 case RDMA_TRANSPORT_IB
:
1689 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
1691 case RDMA_TRANSPORT_IWARP
:
1692 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
1703 cma_comp_exch(id_priv
, CMA_ROUTE_QUERY
, CMA_ADDR_RESOLVED
);
1704 cma_deref_id(id_priv
);
1707 EXPORT_SYMBOL(rdma_resolve_route
);
1709 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
1711 struct cma_device
*cma_dev
;
1712 struct ib_port_attr port_attr
;
1719 if (list_empty(&dev_list
)) {
1723 list_for_each_entry(cma_dev
, &dev_list
, list
)
1724 for (p
= 1; p
<= cma_dev
->device
->phys_port_cnt
; ++p
)
1725 if (!ib_query_port(cma_dev
->device
, p
, &port_attr
) &&
1726 port_attr
.state
== IB_PORT_ACTIVE
)
1730 cma_dev
= list_entry(dev_list
.next
, struct cma_device
, list
);
1733 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
);
1737 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
1741 ib_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1742 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
1743 id_priv
->id
.port_num
= p
;
1744 cma_attach_to_dev(id_priv
, cma_dev
);
1746 mutex_unlock(&lock
);
1750 static void addr_handler(int status
, struct sockaddr
*src_addr
,
1751 struct rdma_dev_addr
*dev_addr
, void *context
)
1753 struct rdma_id_private
*id_priv
= context
;
1754 struct rdma_cm_event event
;
1756 memset(&event
, 0, sizeof event
);
1757 mutex_lock(&id_priv
->handler_mutex
);
1760 * Grab mutex to block rdma_destroy_id() from removing the device while
1761 * we're trying to acquire it.
1764 if (!cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_RESOLVED
)) {
1765 mutex_unlock(&lock
);
1769 if (!status
&& !id_priv
->cma_dev
)
1770 status
= cma_acquire_dev(id_priv
);
1771 mutex_unlock(&lock
);
1774 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ADDR_BOUND
))
1776 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
1777 event
.status
= status
;
1779 memcpy(&id_priv
->id
.route
.addr
.src_addr
, src_addr
,
1780 ip_addr_size(src_addr
));
1781 event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1784 if (id_priv
->id
.event_handler(&id_priv
->id
, &event
)) {
1785 cma_exch(id_priv
, CMA_DESTROYING
);
1786 mutex_unlock(&id_priv
->handler_mutex
);
1787 cma_deref_id(id_priv
);
1788 rdma_destroy_id(&id_priv
->id
);
1792 mutex_unlock(&id_priv
->handler_mutex
);
1793 cma_deref_id(id_priv
);
1796 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
1798 struct cma_work
*work
;
1799 struct sockaddr_in
*src_in
, *dst_in
;
1803 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1807 if (!id_priv
->cma_dev
) {
1808 ret
= cma_bind_loopback(id_priv
);
1813 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1814 ib_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1816 if (cma_zero_addr(&id_priv
->id
.route
.addr
.src_addr
)) {
1817 src_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.src_addr
;
1818 dst_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.dst_addr
;
1819 src_in
->sin_family
= dst_in
->sin_family
;
1820 src_in
->sin_addr
.s_addr
= dst_in
->sin_addr
.s_addr
;
1824 INIT_WORK(&work
->work
, cma_work_handler
);
1825 work
->old_state
= CMA_ADDR_QUERY
;
1826 work
->new_state
= CMA_ADDR_RESOLVED
;
1827 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1828 queue_work(cma_wq
, &work
->work
);
1835 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1836 struct sockaddr
*dst_addr
)
1838 if (src_addr
&& src_addr
->sa_family
)
1839 return rdma_bind_addr(id
, src_addr
);
1841 return cma_bind_any(id
, dst_addr
->sa_family
);
1844 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1845 struct sockaddr
*dst_addr
, int timeout_ms
)
1847 struct rdma_id_private
*id_priv
;
1850 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1851 if (id_priv
->state
== CMA_IDLE
) {
1852 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
1857 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_ADDR_QUERY
))
1860 atomic_inc(&id_priv
->refcount
);
1861 memcpy(&id
->route
.addr
.dst_addr
, dst_addr
, ip_addr_size(dst_addr
));
1862 if (cma_any_addr(dst_addr
))
1863 ret
= cma_resolve_loopback(id_priv
);
1865 ret
= rdma_resolve_ip(&addr_client
, &id
->route
.addr
.src_addr
,
1866 dst_addr
, &id
->route
.addr
.dev_addr
,
1867 timeout_ms
, addr_handler
, id_priv
);
1873 cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_BOUND
);
1874 cma_deref_id(id_priv
);
1877 EXPORT_SYMBOL(rdma_resolve_addr
);
1879 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
1880 struct rdma_id_private
*id_priv
)
1882 struct sockaddr_in
*sin
;
1884 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1885 sin
->sin_port
= htons(bind_list
->port
);
1886 id_priv
->bind_list
= bind_list
;
1887 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
1890 static int cma_alloc_port(struct idr
*ps
, struct rdma_id_private
*id_priv
,
1891 unsigned short snum
)
1893 struct rdma_bind_list
*bind_list
;
1896 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1901 ret
= idr_get_new_above(ps
, bind_list
, snum
, &port
);
1902 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1908 ret
= -EADDRNOTAVAIL
;
1913 bind_list
->port
= (unsigned short) port
;
1914 cma_bind_port(bind_list
, id_priv
);
1917 idr_remove(ps
, port
);
1923 static int cma_alloc_any_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1925 struct rdma_bind_list
*bind_list
;
1926 int port
, ret
, low
, high
;
1928 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1933 /* FIXME: add proper port randomization per like inet_csk_get_port */
1935 ret
= idr_get_new_above(ps
, bind_list
, next_port
, &port
);
1936 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1941 inet_get_local_port_range(&low
, &high
);
1943 if (next_port
!= low
) {
1944 idr_remove(ps
, port
);
1948 ret
= -EADDRNOTAVAIL
;
1955 next_port
= port
+ 1;
1958 bind_list
->port
= (unsigned short) port
;
1959 cma_bind_port(bind_list
, id_priv
);
1962 idr_remove(ps
, port
);
1968 static int cma_use_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1970 struct rdma_id_private
*cur_id
;
1971 struct sockaddr_in
*sin
, *cur_sin
;
1972 struct rdma_bind_list
*bind_list
;
1973 struct hlist_node
*node
;
1974 unsigned short snum
;
1976 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1977 snum
= ntohs(sin
->sin_port
);
1978 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
1981 bind_list
= idr_find(ps
, snum
);
1983 return cma_alloc_port(ps
, id_priv
, snum
);
1986 * We don't support binding to any address if anyone is bound to
1987 * a specific address on the same port.
1989 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
))
1990 return -EADDRNOTAVAIL
;
1992 hlist_for_each_entry(cur_id
, node
, &bind_list
->owners
, node
) {
1993 if (cma_any_addr(&cur_id
->id
.route
.addr
.src_addr
))
1994 return -EADDRNOTAVAIL
;
1996 cur_sin
= (struct sockaddr_in
*) &cur_id
->id
.route
.addr
.src_addr
;
1997 if (sin
->sin_addr
.s_addr
== cur_sin
->sin_addr
.s_addr
)
2001 cma_bind_port(bind_list
, id_priv
);
2005 static int cma_get_port(struct rdma_id_private
*id_priv
)
2010 switch (id_priv
->id
.ps
) {
2024 return -EPROTONOSUPPORT
;
2028 if (cma_any_port(&id_priv
->id
.route
.addr
.src_addr
))
2029 ret
= cma_alloc_any_port(ps
, id_priv
);
2031 ret
= cma_use_port(ps
, id_priv
);
2032 mutex_unlock(&lock
);
2037 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
2039 struct rdma_id_private
*id_priv
;
2042 if (addr
->sa_family
!= AF_INET
)
2043 return -EAFNOSUPPORT
;
2045 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2046 if (!cma_comp_exch(id_priv
, CMA_IDLE
, CMA_ADDR_BOUND
))
2049 if (!cma_any_addr(addr
)) {
2050 ret
= rdma_translate_ip(addr
, &id
->route
.addr
.dev_addr
);
2055 ret
= cma_acquire_dev(id_priv
);
2056 mutex_unlock(&lock
);
2061 memcpy(&id
->route
.addr
.src_addr
, addr
, ip_addr_size(addr
));
2062 ret
= cma_get_port(id_priv
);
2068 if (!cma_any_addr(addr
)) {
2070 cma_detach_from_dev(id_priv
);
2071 mutex_unlock(&lock
);
2074 cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_IDLE
);
2077 EXPORT_SYMBOL(rdma_bind_addr
);
2079 static int cma_format_hdr(void *hdr
, enum rdma_port_space ps
,
2080 struct rdma_route
*route
)
2082 struct sockaddr_in
*src4
, *dst4
;
2083 struct cma_hdr
*cma_hdr
;
2084 struct sdp_hh
*sdp_hdr
;
2086 src4
= (struct sockaddr_in
*) &route
->addr
.src_addr
;
2087 dst4
= (struct sockaddr_in
*) &route
->addr
.dst_addr
;
2092 if (sdp_get_majv(sdp_hdr
->sdp_version
) != SDP_MAJ_VERSION
)
2094 sdp_set_ip_ver(sdp_hdr
, 4);
2095 sdp_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2096 sdp_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2097 sdp_hdr
->port
= src4
->sin_port
;
2101 cma_hdr
->cma_version
= CMA_VERSION
;
2102 cma_set_ip_ver(cma_hdr
, 4);
2103 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2104 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2105 cma_hdr
->port
= src4
->sin_port
;
2111 static int cma_sidr_rep_handler(struct ib_cm_id
*cm_id
,
2112 struct ib_cm_event
*ib_event
)
2114 struct rdma_id_private
*id_priv
= cm_id
->context
;
2115 struct rdma_cm_event event
;
2116 struct ib_cm_sidr_rep_event_param
*rep
= &ib_event
->param
.sidr_rep_rcvd
;
2119 if (cma_disable_callback(id_priv
, CMA_CONNECT
))
2122 memset(&event
, 0, sizeof event
);
2123 switch (ib_event
->event
) {
2124 case IB_CM_SIDR_REQ_ERROR
:
2125 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2126 event
.status
= -ETIMEDOUT
;
2128 case IB_CM_SIDR_REP_RECEIVED
:
2129 event
.param
.ud
.private_data
= ib_event
->private_data
;
2130 event
.param
.ud
.private_data_len
= IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
;
2131 if (rep
->status
!= IB_SIDR_SUCCESS
) {
2132 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2133 event
.status
= ib_event
->param
.sidr_rep_rcvd
.status
;
2136 if (id_priv
->qkey
!= rep
->qkey
) {
2137 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2138 event
.status
= -EINVAL
;
2141 ib_init_ah_from_path(id_priv
->id
.device
, id_priv
->id
.port_num
,
2142 id_priv
->id
.route
.path_rec
,
2143 &event
.param
.ud
.ah_attr
);
2144 event
.param
.ud
.qp_num
= rep
->qpn
;
2145 event
.param
.ud
.qkey
= rep
->qkey
;
2146 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
2150 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d\n",
2155 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2157 /* Destroy the CM ID by returning a non-zero value. */
2158 id_priv
->cm_id
.ib
= NULL
;
2159 cma_exch(id_priv
, CMA_DESTROYING
);
2160 mutex_unlock(&id_priv
->handler_mutex
);
2161 rdma_destroy_id(&id_priv
->id
);
2165 mutex_unlock(&id_priv
->handler_mutex
);
2169 static int cma_resolve_ib_udp(struct rdma_id_private
*id_priv
,
2170 struct rdma_conn_param
*conn_param
)
2172 struct ib_cm_sidr_req_param req
;
2173 struct rdma_route
*route
;
2176 req
.private_data_len
= sizeof(struct cma_hdr
) +
2177 conn_param
->private_data_len
;
2178 req
.private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2179 if (!req
.private_data
)
2182 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2183 memcpy((void *) req
.private_data
+ sizeof(struct cma_hdr
),
2184 conn_param
->private_data
, conn_param
->private_data_len
);
2186 route
= &id_priv
->id
.route
;
2187 ret
= cma_format_hdr((void *) req
.private_data
, id_priv
->id
.ps
, route
);
2191 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
,
2192 cma_sidr_rep_handler
, id_priv
);
2193 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2194 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2198 req
.path
= route
->path_rec
;
2199 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2200 &route
->addr
.dst_addr
);
2201 req
.timeout_ms
= 1 << (CMA_CM_RESPONSE_TIMEOUT
- 8);
2202 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2204 ret
= ib_send_cm_sidr_req(id_priv
->cm_id
.ib
, &req
);
2206 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2207 id_priv
->cm_id
.ib
= NULL
;
2210 kfree(req
.private_data
);
2214 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
2215 struct rdma_conn_param
*conn_param
)
2217 struct ib_cm_req_param req
;
2218 struct rdma_route
*route
;
2222 memset(&req
, 0, sizeof req
);
2223 offset
= cma_user_data_offset(id_priv
->id
.ps
);
2224 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
2225 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2229 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2230 memcpy(private_data
+ offset
, conn_param
->private_data
,
2231 conn_param
->private_data_len
);
2233 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
,
2235 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2236 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2240 route
= &id_priv
->id
.route
;
2241 ret
= cma_format_hdr(private_data
, id_priv
->id
.ps
, route
);
2244 req
.private_data
= private_data
;
2246 req
.primary_path
= &route
->path_rec
[0];
2247 if (route
->num_paths
== 2)
2248 req
.alternate_path
= &route
->path_rec
[1];
2250 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2251 &route
->addr
.dst_addr
);
2252 req
.qp_num
= id_priv
->qp_num
;
2253 req
.qp_type
= IB_QPT_RC
;
2254 req
.starting_psn
= id_priv
->seq_num
;
2255 req
.responder_resources
= conn_param
->responder_resources
;
2256 req
.initiator_depth
= conn_param
->initiator_depth
;
2257 req
.flow_control
= conn_param
->flow_control
;
2258 req
.retry_count
= conn_param
->retry_count
;
2259 req
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2260 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2261 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2262 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2263 req
.srq
= id_priv
->srq
? 1 : 0;
2265 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
2267 if (ret
&& !IS_ERR(id_priv
->cm_id
.ib
)) {
2268 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2269 id_priv
->cm_id
.ib
= NULL
;
2272 kfree(private_data
);
2276 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
2277 struct rdma_conn_param
*conn_param
)
2279 struct iw_cm_id
*cm_id
;
2280 struct sockaddr_in
* sin
;
2282 struct iw_cm_conn_param iw_param
;
2284 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
2285 if (IS_ERR(cm_id
)) {
2286 ret
= PTR_ERR(cm_id
);
2290 id_priv
->cm_id
.iw
= cm_id
;
2292 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
2293 cm_id
->local_addr
= *sin
;
2295 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
2296 cm_id
->remote_addr
= *sin
;
2298 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
2302 iw_param
.ord
= conn_param
->initiator_depth
;
2303 iw_param
.ird
= conn_param
->responder_resources
;
2304 iw_param
.private_data
= conn_param
->private_data
;
2305 iw_param
.private_data_len
= conn_param
->private_data_len
;
2307 iw_param
.qpn
= id_priv
->qp_num
;
2309 iw_param
.qpn
= conn_param
->qp_num
;
2310 ret
= iw_cm_connect(cm_id
, &iw_param
);
2312 if (ret
&& !IS_ERR(cm_id
)) {
2313 iw_destroy_cm_id(cm_id
);
2314 id_priv
->cm_id
.iw
= NULL
;
2319 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2321 struct rdma_id_private
*id_priv
;
2324 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2325 if (!cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_CONNECT
))
2329 id_priv
->qp_num
= conn_param
->qp_num
;
2330 id_priv
->srq
= conn_param
->srq
;
2333 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2334 case RDMA_TRANSPORT_IB
:
2335 if (cma_is_ud_ps(id
->ps
))
2336 ret
= cma_resolve_ib_udp(id_priv
, conn_param
);
2338 ret
= cma_connect_ib(id_priv
, conn_param
);
2340 case RDMA_TRANSPORT_IWARP
:
2341 ret
= cma_connect_iw(id_priv
, conn_param
);
2352 cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_ROUTE_RESOLVED
);
2355 EXPORT_SYMBOL(rdma_connect
);
2357 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
2358 struct rdma_conn_param
*conn_param
)
2360 struct ib_cm_rep_param rep
;
2363 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
2367 ret
= cma_modify_qp_rts(id_priv
, conn_param
);
2371 memset(&rep
, 0, sizeof rep
);
2372 rep
.qp_num
= id_priv
->qp_num
;
2373 rep
.starting_psn
= id_priv
->seq_num
;
2374 rep
.private_data
= conn_param
->private_data
;
2375 rep
.private_data_len
= conn_param
->private_data_len
;
2376 rep
.responder_resources
= conn_param
->responder_resources
;
2377 rep
.initiator_depth
= conn_param
->initiator_depth
;
2378 rep
.failover_accepted
= 0;
2379 rep
.flow_control
= conn_param
->flow_control
;
2380 rep
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2381 rep
.srq
= id_priv
->srq
? 1 : 0;
2383 ret
= ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
2388 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
2389 struct rdma_conn_param
*conn_param
)
2391 struct iw_cm_conn_param iw_param
;
2394 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
2398 iw_param
.ord
= conn_param
->initiator_depth
;
2399 iw_param
.ird
= conn_param
->responder_resources
;
2400 iw_param
.private_data
= conn_param
->private_data
;
2401 iw_param
.private_data_len
= conn_param
->private_data_len
;
2402 if (id_priv
->id
.qp
) {
2403 iw_param
.qpn
= id_priv
->qp_num
;
2405 iw_param
.qpn
= conn_param
->qp_num
;
2407 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
2410 static int cma_send_sidr_rep(struct rdma_id_private
*id_priv
,
2411 enum ib_cm_sidr_status status
,
2412 const void *private_data
, int private_data_len
)
2414 struct ib_cm_sidr_rep_param rep
;
2416 memset(&rep
, 0, sizeof rep
);
2417 rep
.status
= status
;
2418 if (status
== IB_SIDR_SUCCESS
) {
2419 rep
.qp_num
= id_priv
->qp_num
;
2420 rep
.qkey
= id_priv
->qkey
;
2422 rep
.private_data
= private_data
;
2423 rep
.private_data_len
= private_data_len
;
2425 return ib_send_cm_sidr_rep(id_priv
->cm_id
.ib
, &rep
);
2428 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2430 struct rdma_id_private
*id_priv
;
2433 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2434 if (!cma_comp(id_priv
, CMA_CONNECT
))
2437 if (!id
->qp
&& conn_param
) {
2438 id_priv
->qp_num
= conn_param
->qp_num
;
2439 id_priv
->srq
= conn_param
->srq
;
2442 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2443 case RDMA_TRANSPORT_IB
:
2444 if (cma_is_ud_ps(id
->ps
))
2445 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
2446 conn_param
->private_data
,
2447 conn_param
->private_data_len
);
2448 else if (conn_param
)
2449 ret
= cma_accept_ib(id_priv
, conn_param
);
2451 ret
= cma_rep_recv(id_priv
);
2453 case RDMA_TRANSPORT_IWARP
:
2454 ret
= cma_accept_iw(id_priv
, conn_param
);
2466 cma_modify_qp_err(id_priv
);
2467 rdma_reject(id
, NULL
, 0);
2470 EXPORT_SYMBOL(rdma_accept
);
2472 int rdma_notify(struct rdma_cm_id
*id
, enum ib_event_type event
)
2474 struct rdma_id_private
*id_priv
;
2477 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2478 if (!cma_has_cm_dev(id_priv
))
2481 switch (id
->device
->node_type
) {
2482 case RDMA_NODE_IB_CA
:
2483 ret
= ib_cm_notify(id_priv
->cm_id
.ib
, event
);
2491 EXPORT_SYMBOL(rdma_notify
);
2493 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
2494 u8 private_data_len
)
2496 struct rdma_id_private
*id_priv
;
2499 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2500 if (!cma_has_cm_dev(id_priv
))
2503 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2504 case RDMA_TRANSPORT_IB
:
2505 if (cma_is_ud_ps(id
->ps
))
2506 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_REJECT
,
2507 private_data
, private_data_len
);
2509 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
2510 IB_CM_REJ_CONSUMER_DEFINED
, NULL
,
2511 0, private_data
, private_data_len
);
2513 case RDMA_TRANSPORT_IWARP
:
2514 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
2515 private_data
, private_data_len
);
2523 EXPORT_SYMBOL(rdma_reject
);
2525 int rdma_disconnect(struct rdma_cm_id
*id
)
2527 struct rdma_id_private
*id_priv
;
2530 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2531 if (!cma_has_cm_dev(id_priv
))
2534 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2535 case RDMA_TRANSPORT_IB
:
2536 ret
= cma_modify_qp_err(id_priv
);
2539 /* Initiate or respond to a disconnect. */
2540 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
2541 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
2543 case RDMA_TRANSPORT_IWARP
:
2544 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
2553 EXPORT_SYMBOL(rdma_disconnect
);
2555 static int cma_ib_mc_handler(int status
, struct ib_sa_multicast
*multicast
)
2557 struct rdma_id_private
*id_priv
;
2558 struct cma_multicast
*mc
= multicast
->context
;
2559 struct rdma_cm_event event
;
2562 id_priv
= mc
->id_priv
;
2563 if (cma_disable_callback(id_priv
, CMA_ADDR_BOUND
) &&
2564 cma_disable_callback(id_priv
, CMA_ADDR_RESOLVED
))
2567 mutex_lock(&id_priv
->qp_mutex
);
2568 if (!status
&& id_priv
->id
.qp
)
2569 status
= ib_attach_mcast(id_priv
->id
.qp
, &multicast
->rec
.mgid
,
2570 multicast
->rec
.mlid
);
2571 mutex_unlock(&id_priv
->qp_mutex
);
2573 memset(&event
, 0, sizeof event
);
2574 event
.status
= status
;
2575 event
.param
.ud
.private_data
= mc
->context
;
2577 event
.event
= RDMA_CM_EVENT_MULTICAST_JOIN
;
2578 ib_init_ah_from_mcmember(id_priv
->id
.device
,
2579 id_priv
->id
.port_num
, &multicast
->rec
,
2580 &event
.param
.ud
.ah_attr
);
2581 event
.param
.ud
.qp_num
= 0xFFFFFF;
2582 event
.param
.ud
.qkey
= be32_to_cpu(multicast
->rec
.qkey
);
2584 event
.event
= RDMA_CM_EVENT_MULTICAST_ERROR
;
2586 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2588 cma_exch(id_priv
, CMA_DESTROYING
);
2589 mutex_unlock(&id_priv
->handler_mutex
);
2590 rdma_destroy_id(&id_priv
->id
);
2594 mutex_unlock(&id_priv
->handler_mutex
);
2598 static void cma_set_mgid(struct rdma_id_private
*id_priv
,
2599 struct sockaddr
*addr
, union ib_gid
*mgid
)
2601 unsigned char mc_map
[MAX_ADDR_LEN
];
2602 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2603 struct sockaddr_in
*sin
= (struct sockaddr_in
*) addr
;
2604 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) addr
;
2606 if (cma_any_addr(addr
)) {
2607 memset(mgid
, 0, sizeof *mgid
);
2608 } else if ((addr
->sa_family
== AF_INET6
) &&
2609 ((be32_to_cpu(sin6
->sin6_addr
.s6_addr32
[0]) & 0xFF10A01B) ==
2611 /* IPv6 address is an SA assigned MGID. */
2612 memcpy(mgid
, &sin6
->sin6_addr
, sizeof *mgid
);
2614 ip_ib_mc_map(sin
->sin_addr
.s_addr
, dev_addr
->broadcast
, mc_map
);
2615 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2616 mc_map
[7] = 0x01; /* Use RDMA CM signature */
2617 *mgid
= *(union ib_gid
*) (mc_map
+ 4);
2621 static int cma_join_ib_multicast(struct rdma_id_private
*id_priv
,
2622 struct cma_multicast
*mc
)
2624 struct ib_sa_mcmember_rec rec
;
2625 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2626 ib_sa_comp_mask comp_mask
;
2629 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
2630 ret
= ib_sa_get_mcmember_rec(id_priv
->id
.device
, id_priv
->id
.port_num
,
2635 cma_set_mgid(id_priv
, &mc
->addr
, &rec
.mgid
);
2636 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2637 rec
.qkey
= cpu_to_be32(RDMA_UDP_QKEY
);
2638 ib_addr_get_sgid(dev_addr
, &rec
.port_gid
);
2639 rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(dev_addr
));
2642 comp_mask
= IB_SA_MCMEMBER_REC_MGID
| IB_SA_MCMEMBER_REC_PORT_GID
|
2643 IB_SA_MCMEMBER_REC_PKEY
| IB_SA_MCMEMBER_REC_JOIN_STATE
|
2644 IB_SA_MCMEMBER_REC_QKEY
| IB_SA_MCMEMBER_REC_SL
|
2645 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
2646 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
;
2648 mc
->multicast
.ib
= ib_sa_join_multicast(&sa_client
, id_priv
->id
.device
,
2649 id_priv
->id
.port_num
, &rec
,
2650 comp_mask
, GFP_KERNEL
,
2651 cma_ib_mc_handler
, mc
);
2652 if (IS_ERR(mc
->multicast
.ib
))
2653 return PTR_ERR(mc
->multicast
.ib
);
2658 int rdma_join_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
,
2661 struct rdma_id_private
*id_priv
;
2662 struct cma_multicast
*mc
;
2665 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2666 if (!cma_comp(id_priv
, CMA_ADDR_BOUND
) &&
2667 !cma_comp(id_priv
, CMA_ADDR_RESOLVED
))
2670 mc
= kmalloc(sizeof *mc
, GFP_KERNEL
);
2674 memcpy(&mc
->addr
, addr
, ip_addr_size(addr
));
2675 mc
->context
= context
;
2676 mc
->id_priv
= id_priv
;
2678 spin_lock(&id_priv
->lock
);
2679 list_add(&mc
->list
, &id_priv
->mc_list
);
2680 spin_unlock(&id_priv
->lock
);
2682 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2683 case RDMA_TRANSPORT_IB
:
2684 ret
= cma_join_ib_multicast(id_priv
, mc
);
2692 spin_lock_irq(&id_priv
->lock
);
2693 list_del(&mc
->list
);
2694 spin_unlock_irq(&id_priv
->lock
);
2699 EXPORT_SYMBOL(rdma_join_multicast
);
2701 void rdma_leave_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
2703 struct rdma_id_private
*id_priv
;
2704 struct cma_multicast
*mc
;
2706 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2707 spin_lock_irq(&id_priv
->lock
);
2708 list_for_each_entry(mc
, &id_priv
->mc_list
, list
) {
2709 if (!memcmp(&mc
->addr
, addr
, ip_addr_size(addr
))) {
2710 list_del(&mc
->list
);
2711 spin_unlock_irq(&id_priv
->lock
);
2714 ib_detach_mcast(id
->qp
,
2715 &mc
->multicast
.ib
->rec
.mgid
,
2716 mc
->multicast
.ib
->rec
.mlid
);
2717 ib_sa_free_multicast(mc
->multicast
.ib
);
2722 spin_unlock_irq(&id_priv
->lock
);
2724 EXPORT_SYMBOL(rdma_leave_multicast
);
2726 static void cma_add_one(struct ib_device
*device
)
2728 struct cma_device
*cma_dev
;
2729 struct rdma_id_private
*id_priv
;
2731 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
2735 cma_dev
->device
= device
;
2737 init_completion(&cma_dev
->comp
);
2738 atomic_set(&cma_dev
->refcount
, 1);
2739 INIT_LIST_HEAD(&cma_dev
->id_list
);
2740 ib_set_client_data(device
, &cma_client
, cma_dev
);
2743 list_add_tail(&cma_dev
->list
, &dev_list
);
2744 list_for_each_entry(id_priv
, &listen_any_list
, list
)
2745 cma_listen_on_dev(id_priv
, cma_dev
);
2746 mutex_unlock(&lock
);
2749 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
2751 struct rdma_cm_event event
;
2752 enum cma_state state
;
2755 /* Record that we want to remove the device */
2756 state
= cma_exch(id_priv
, CMA_DEVICE_REMOVAL
);
2757 if (state
== CMA_DESTROYING
)
2760 cma_cancel_operation(id_priv
, state
);
2761 mutex_lock(&id_priv
->handler_mutex
);
2763 /* Check for destruction from another callback. */
2764 if (!cma_comp(id_priv
, CMA_DEVICE_REMOVAL
))
2767 memset(&event
, 0, sizeof event
);
2768 event
.event
= RDMA_CM_EVENT_DEVICE_REMOVAL
;
2769 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2771 mutex_unlock(&id_priv
->handler_mutex
);
2775 static void cma_process_remove(struct cma_device
*cma_dev
)
2777 struct rdma_id_private
*id_priv
;
2781 while (!list_empty(&cma_dev
->id_list
)) {
2782 id_priv
= list_entry(cma_dev
->id_list
.next
,
2783 struct rdma_id_private
, list
);
2785 list_del(&id_priv
->listen_list
);
2786 list_del_init(&id_priv
->list
);
2787 atomic_inc(&id_priv
->refcount
);
2788 mutex_unlock(&lock
);
2790 ret
= id_priv
->internal_id
? 1 : cma_remove_id_dev(id_priv
);
2791 cma_deref_id(id_priv
);
2793 rdma_destroy_id(&id_priv
->id
);
2797 mutex_unlock(&lock
);
2799 cma_deref_dev(cma_dev
);
2800 wait_for_completion(&cma_dev
->comp
);
2803 static void cma_remove_one(struct ib_device
*device
)
2805 struct cma_device
*cma_dev
;
2807 cma_dev
= ib_get_client_data(device
, &cma_client
);
2812 list_del(&cma_dev
->list
);
2813 mutex_unlock(&lock
);
2815 cma_process_remove(cma_dev
);
2819 static int cma_init(void)
2821 int ret
, low
, high
, remaining
;
2823 get_random_bytes(&next_port
, sizeof next_port
);
2824 inet_get_local_port_range(&low
, &high
);
2825 remaining
= (high
- low
) + 1;
2826 next_port
= ((unsigned int) next_port
% remaining
) + low
;
2828 cma_wq
= create_singlethread_workqueue("rdma_cm");
2832 ib_sa_register_client(&sa_client
);
2833 rdma_addr_register_client(&addr_client
);
2835 ret
= ib_register_client(&cma_client
);
2841 rdma_addr_unregister_client(&addr_client
);
2842 ib_sa_unregister_client(&sa_client
);
2843 destroy_workqueue(cma_wq
);
2847 static void cma_cleanup(void)
2849 ib_unregister_client(&cma_client
);
2850 rdma_addr_unregister_client(&addr_client
);
2851 ib_sa_unregister_client(&sa_client
);
2852 destroy_workqueue(cma_wq
);
2853 idr_destroy(&sdp_ps
);
2854 idr_destroy(&tcp_ps
);
2855 idr_destroy(&udp_ps
);
2856 idr_destroy(&ipoib_ps
);
2859 module_init(cma_init
);
2860 module_exit(cma_cleanup
);