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 wait_queue_head_t wait_remove
;
138 struct ib_sa_query
*query
;
152 struct cma_multicast
{
153 struct rdma_id_private
*id_priv
;
155 struct ib_sa_multicast
*ib
;
157 struct list_head list
;
159 struct sockaddr addr
;
160 u8 pad
[sizeof(struct sockaddr_in6
) -
161 sizeof(struct sockaddr
)];
165 struct work_struct work
;
166 struct rdma_id_private
*id
;
167 enum cma_state old_state
;
168 enum cma_state new_state
;
169 struct rdma_cm_event event
;
182 u8 ip_version
; /* IP version: 7:4 */
184 union cma_ip_addr src_addr
;
185 union cma_ip_addr dst_addr
;
190 u8 sdp_version
; /* Major version: 7:4 */
191 u8 ip_version
; /* IP version: 7:4 */
192 u8 sdp_specific1
[10];
194 __be16 sdp_specific2
;
195 union cma_ip_addr src_addr
;
196 union cma_ip_addr dst_addr
;
204 #define CMA_VERSION 0x00
205 #define SDP_MAJ_VERSION 0x2
207 static int cma_comp(struct rdma_id_private
*id_priv
, enum cma_state comp
)
212 spin_lock_irqsave(&id_priv
->lock
, flags
);
213 ret
= (id_priv
->state
== comp
);
214 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
218 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
219 enum cma_state comp
, enum cma_state exch
)
224 spin_lock_irqsave(&id_priv
->lock
, flags
);
225 if ((ret
= (id_priv
->state
== comp
)))
226 id_priv
->state
= exch
;
227 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
231 static enum cma_state
cma_exch(struct rdma_id_private
*id_priv
,
237 spin_lock_irqsave(&id_priv
->lock
, flags
);
238 old
= id_priv
->state
;
239 id_priv
->state
= exch
;
240 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
244 static inline u8
cma_get_ip_ver(struct cma_hdr
*hdr
)
246 return hdr
->ip_version
>> 4;
249 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
251 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
254 static inline u8
sdp_get_majv(u8 sdp_version
)
256 return sdp_version
>> 4;
259 static inline u8
sdp_get_ip_ver(struct sdp_hh
*hh
)
261 return hh
->ip_version
>> 4;
264 static inline void sdp_set_ip_ver(struct sdp_hh
*hh
, u8 ip_ver
)
266 hh
->ip_version
= (ip_ver
<< 4) | (hh
->ip_version
& 0xF);
269 static inline int cma_is_ud_ps(enum rdma_port_space ps
)
271 return (ps
== RDMA_PS_UDP
|| ps
== RDMA_PS_IPOIB
);
274 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
275 struct cma_device
*cma_dev
)
277 atomic_inc(&cma_dev
->refcount
);
278 id_priv
->cma_dev
= cma_dev
;
279 id_priv
->id
.device
= cma_dev
->device
;
280 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
283 static inline void cma_deref_dev(struct cma_device
*cma_dev
)
285 if (atomic_dec_and_test(&cma_dev
->refcount
))
286 complete(&cma_dev
->comp
);
289 static void cma_detach_from_dev(struct rdma_id_private
*id_priv
)
291 list_del(&id_priv
->list
);
292 cma_deref_dev(id_priv
->cma_dev
);
293 id_priv
->cma_dev
= NULL
;
296 static int cma_set_qkey(struct ib_device
*device
, u8 port_num
,
297 enum rdma_port_space ps
,
298 struct rdma_dev_addr
*dev_addr
, u32
*qkey
)
300 struct ib_sa_mcmember_rec rec
;
305 *qkey
= RDMA_UDP_QKEY
;
308 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
309 ret
= ib_sa_get_mcmember_rec(device
, port_num
, &rec
.mgid
, &rec
);
310 *qkey
= be32_to_cpu(rec
.qkey
);
318 static int cma_acquire_dev(struct rdma_id_private
*id_priv
)
320 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
321 struct cma_device
*cma_dev
;
325 switch (rdma_node_get_transport(dev_addr
->dev_type
)) {
326 case RDMA_TRANSPORT_IB
:
327 ib_addr_get_sgid(dev_addr
, &gid
);
329 case RDMA_TRANSPORT_IWARP
:
330 iw_addr_get_sgid(dev_addr
, &gid
);
336 list_for_each_entry(cma_dev
, &dev_list
, list
) {
337 ret
= ib_find_cached_gid(cma_dev
->device
, &gid
,
338 &id_priv
->id
.port_num
, NULL
);
340 ret
= cma_set_qkey(cma_dev
->device
,
341 id_priv
->id
.port_num
,
342 id_priv
->id
.ps
, dev_addr
,
345 cma_attach_to_dev(id_priv
, cma_dev
);
352 static void cma_deref_id(struct rdma_id_private
*id_priv
)
354 if (atomic_dec_and_test(&id_priv
->refcount
))
355 complete(&id_priv
->comp
);
358 static int cma_disable_remove(struct rdma_id_private
*id_priv
,
359 enum cma_state state
)
364 spin_lock_irqsave(&id_priv
->lock
, flags
);
365 if (id_priv
->state
== state
) {
366 atomic_inc(&id_priv
->dev_remove
);
370 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
374 static void cma_enable_remove(struct rdma_id_private
*id_priv
)
376 if (atomic_dec_and_test(&id_priv
->dev_remove
))
377 wake_up(&id_priv
->wait_remove
);
380 static int cma_has_cm_dev(struct rdma_id_private
*id_priv
)
382 return (id_priv
->id
.device
&& id_priv
->cm_id
.ib
);
385 struct rdma_cm_id
*rdma_create_id(rdma_cm_event_handler event_handler
,
386 void *context
, enum rdma_port_space ps
)
388 struct rdma_id_private
*id_priv
;
390 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
392 return ERR_PTR(-ENOMEM
);
394 id_priv
->state
= CMA_IDLE
;
395 id_priv
->id
.context
= context
;
396 id_priv
->id
.event_handler
= event_handler
;
398 spin_lock_init(&id_priv
->lock
);
399 mutex_init(&id_priv
->qp_mutex
);
400 init_completion(&id_priv
->comp
);
401 atomic_set(&id_priv
->refcount
, 1);
402 init_waitqueue_head(&id_priv
->wait_remove
);
403 atomic_set(&id_priv
->dev_remove
, 0);
404 INIT_LIST_HEAD(&id_priv
->listen_list
);
405 INIT_LIST_HEAD(&id_priv
->mc_list
);
406 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
410 EXPORT_SYMBOL(rdma_create_id
);
412 static int cma_init_ud_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
414 struct ib_qp_attr qp_attr
;
415 int qp_attr_mask
, ret
;
417 qp_attr
.qp_state
= IB_QPS_INIT
;
418 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
422 ret
= ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
426 qp_attr
.qp_state
= IB_QPS_RTR
;
427 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
);
431 qp_attr
.qp_state
= IB_QPS_RTS
;
433 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
438 static int cma_init_conn_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
440 struct ib_qp_attr qp_attr
;
441 int qp_attr_mask
, ret
;
443 qp_attr
.qp_state
= IB_QPS_INIT
;
444 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
448 return ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
451 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
452 struct ib_qp_init_attr
*qp_init_attr
)
454 struct rdma_id_private
*id_priv
;
458 id_priv
= container_of(id
, struct rdma_id_private
, id
);
459 if (id
->device
!= pd
->device
)
462 qp
= ib_create_qp(pd
, qp_init_attr
);
466 if (cma_is_ud_ps(id_priv
->id
.ps
))
467 ret
= cma_init_ud_qp(id_priv
, qp
);
469 ret
= cma_init_conn_qp(id_priv
, qp
);
474 id_priv
->qp_num
= qp
->qp_num
;
475 id_priv
->srq
= (qp
->srq
!= NULL
);
481 EXPORT_SYMBOL(rdma_create_qp
);
483 void rdma_destroy_qp(struct rdma_cm_id
*id
)
485 struct rdma_id_private
*id_priv
;
487 id_priv
= container_of(id
, struct rdma_id_private
, id
);
488 mutex_lock(&id_priv
->qp_mutex
);
489 ib_destroy_qp(id_priv
->id
.qp
);
490 id_priv
->id
.qp
= NULL
;
491 mutex_unlock(&id_priv
->qp_mutex
);
493 EXPORT_SYMBOL(rdma_destroy_qp
);
495 static int cma_modify_qp_rtr(struct rdma_id_private
*id_priv
,
496 struct rdma_conn_param
*conn_param
)
498 struct ib_qp_attr qp_attr
;
499 int qp_attr_mask
, ret
;
501 mutex_lock(&id_priv
->qp_mutex
);
502 if (!id_priv
->id
.qp
) {
507 /* Need to update QP attributes from default values. */
508 qp_attr
.qp_state
= IB_QPS_INIT
;
509 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
513 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
517 qp_attr
.qp_state
= IB_QPS_RTR
;
518 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
523 qp_attr
.max_dest_rd_atomic
= conn_param
->responder_resources
;
524 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
526 mutex_unlock(&id_priv
->qp_mutex
);
530 static int cma_modify_qp_rts(struct rdma_id_private
*id_priv
,
531 struct rdma_conn_param
*conn_param
)
533 struct ib_qp_attr qp_attr
;
534 int qp_attr_mask
, ret
;
536 mutex_lock(&id_priv
->qp_mutex
);
537 if (!id_priv
->id
.qp
) {
542 qp_attr
.qp_state
= IB_QPS_RTS
;
543 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
548 qp_attr
.max_rd_atomic
= conn_param
->initiator_depth
;
549 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
551 mutex_unlock(&id_priv
->qp_mutex
);
555 static int cma_modify_qp_err(struct rdma_id_private
*id_priv
)
557 struct ib_qp_attr qp_attr
;
560 mutex_lock(&id_priv
->qp_mutex
);
561 if (!id_priv
->id
.qp
) {
566 qp_attr
.qp_state
= IB_QPS_ERR
;
567 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, IB_QP_STATE
);
569 mutex_unlock(&id_priv
->qp_mutex
);
573 static int cma_ib_init_qp_attr(struct rdma_id_private
*id_priv
,
574 struct ib_qp_attr
*qp_attr
, int *qp_attr_mask
)
576 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
579 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
580 ib_addr_get_pkey(dev_addr
),
581 &qp_attr
->pkey_index
);
585 qp_attr
->port_num
= id_priv
->id
.port_num
;
586 *qp_attr_mask
= IB_QP_STATE
| IB_QP_PKEY_INDEX
| IB_QP_PORT
;
588 if (cma_is_ud_ps(id_priv
->id
.ps
)) {
589 qp_attr
->qkey
= id_priv
->qkey
;
590 *qp_attr_mask
|= IB_QP_QKEY
;
592 qp_attr
->qp_access_flags
= 0;
593 *qp_attr_mask
|= IB_QP_ACCESS_FLAGS
;
598 int rdma_init_qp_attr(struct rdma_cm_id
*id
, struct ib_qp_attr
*qp_attr
,
601 struct rdma_id_private
*id_priv
;
604 id_priv
= container_of(id
, struct rdma_id_private
, id
);
605 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
606 case RDMA_TRANSPORT_IB
:
607 if (!id_priv
->cm_id
.ib
|| cma_is_ud_ps(id_priv
->id
.ps
))
608 ret
= cma_ib_init_qp_attr(id_priv
, qp_attr
, qp_attr_mask
);
610 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, qp_attr
,
612 if (qp_attr
->qp_state
== IB_QPS_RTR
)
613 qp_attr
->rq_psn
= id_priv
->seq_num
;
615 case RDMA_TRANSPORT_IWARP
:
616 if (!id_priv
->cm_id
.iw
) {
617 qp_attr
->qp_access_flags
= 0;
618 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
;
620 ret
= iw_cm_init_qp_attr(id_priv
->cm_id
.iw
, qp_attr
,
630 EXPORT_SYMBOL(rdma_init_qp_attr
);
632 static inline int cma_zero_addr(struct sockaddr
*addr
)
634 struct in6_addr
*ip6
;
636 if (addr
->sa_family
== AF_INET
)
637 return ipv4_is_zeronet(
638 ((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
);
640 ip6
= &((struct sockaddr_in6
*) addr
)->sin6_addr
;
641 return (ip6
->s6_addr32
[0] | ip6
->s6_addr32
[1] |
642 ip6
->s6_addr32
[2] | ip6
->s6_addr32
[3]) == 0;
646 static inline int cma_loopback_addr(struct sockaddr
*addr
)
648 return ipv4_is_loopback(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
651 static inline int cma_any_addr(struct sockaddr
*addr
)
653 return cma_zero_addr(addr
) || cma_loopback_addr(addr
);
656 static inline __be16
cma_port(struct sockaddr
*addr
)
658 if (addr
->sa_family
== AF_INET
)
659 return ((struct sockaddr_in
*) addr
)->sin_port
;
661 return ((struct sockaddr_in6
*) addr
)->sin6_port
;
664 static inline int cma_any_port(struct sockaddr
*addr
)
666 return !cma_port(addr
);
669 static int cma_get_net_info(void *hdr
, enum rdma_port_space ps
,
670 u8
*ip_ver
, __be16
*port
,
671 union cma_ip_addr
**src
, union cma_ip_addr
**dst
)
675 if (sdp_get_majv(((struct sdp_hh
*) hdr
)->sdp_version
) !=
679 *ip_ver
= sdp_get_ip_ver(hdr
);
680 *port
= ((struct sdp_hh
*) hdr
)->port
;
681 *src
= &((struct sdp_hh
*) hdr
)->src_addr
;
682 *dst
= &((struct sdp_hh
*) hdr
)->dst_addr
;
685 if (((struct cma_hdr
*) hdr
)->cma_version
!= CMA_VERSION
)
688 *ip_ver
= cma_get_ip_ver(hdr
);
689 *port
= ((struct cma_hdr
*) hdr
)->port
;
690 *src
= &((struct cma_hdr
*) hdr
)->src_addr
;
691 *dst
= &((struct cma_hdr
*) hdr
)->dst_addr
;
695 if (*ip_ver
!= 4 && *ip_ver
!= 6)
700 static void cma_save_net_info(struct rdma_addr
*addr
,
701 struct rdma_addr
*listen_addr
,
702 u8 ip_ver
, __be16 port
,
703 union cma_ip_addr
*src
, union cma_ip_addr
*dst
)
705 struct sockaddr_in
*listen4
, *ip4
;
706 struct sockaddr_in6
*listen6
, *ip6
;
710 listen4
= (struct sockaddr_in
*) &listen_addr
->src_addr
;
711 ip4
= (struct sockaddr_in
*) &addr
->src_addr
;
712 ip4
->sin_family
= listen4
->sin_family
;
713 ip4
->sin_addr
.s_addr
= dst
->ip4
.addr
;
714 ip4
->sin_port
= listen4
->sin_port
;
716 ip4
= (struct sockaddr_in
*) &addr
->dst_addr
;
717 ip4
->sin_family
= listen4
->sin_family
;
718 ip4
->sin_addr
.s_addr
= src
->ip4
.addr
;
719 ip4
->sin_port
= port
;
722 listen6
= (struct sockaddr_in6
*) &listen_addr
->src_addr
;
723 ip6
= (struct sockaddr_in6
*) &addr
->src_addr
;
724 ip6
->sin6_family
= listen6
->sin6_family
;
725 ip6
->sin6_addr
= dst
->ip6
;
726 ip6
->sin6_port
= listen6
->sin6_port
;
728 ip6
= (struct sockaddr_in6
*) &addr
->dst_addr
;
729 ip6
->sin6_family
= listen6
->sin6_family
;
730 ip6
->sin6_addr
= src
->ip6
;
731 ip6
->sin6_port
= port
;
738 static inline int cma_user_data_offset(enum rdma_port_space ps
)
744 return sizeof(struct cma_hdr
);
748 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
750 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
751 case RDMA_TRANSPORT_IB
:
753 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
760 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
762 struct rdma_id_private
*dev_id_priv
;
765 * Remove from listen_any_list to prevent added devices from spawning
766 * additional listen requests.
769 list_del(&id_priv
->list
);
771 while (!list_empty(&id_priv
->listen_list
)) {
772 dev_id_priv
= list_entry(id_priv
->listen_list
.next
,
773 struct rdma_id_private
, listen_list
);
774 /* sync with device removal to avoid duplicate destruction */
775 list_del_init(&dev_id_priv
->list
);
776 list_del(&dev_id_priv
->listen_list
);
779 rdma_destroy_id(&dev_id_priv
->id
);
785 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
786 enum cma_state state
)
790 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
792 case CMA_ROUTE_QUERY
:
793 cma_cancel_route(id_priv
);
796 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
) &&
798 cma_cancel_listens(id_priv
);
805 static void cma_release_port(struct rdma_id_private
*id_priv
)
807 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
813 hlist_del(&id_priv
->node
);
814 if (hlist_empty(&bind_list
->owners
)) {
815 idr_remove(bind_list
->ps
, bind_list
->port
);
821 static void cma_leave_mc_groups(struct rdma_id_private
*id_priv
)
823 struct cma_multicast
*mc
;
825 while (!list_empty(&id_priv
->mc_list
)) {
826 mc
= container_of(id_priv
->mc_list
.next
,
827 struct cma_multicast
, list
);
829 ib_sa_free_multicast(mc
->multicast
.ib
);
834 void rdma_destroy_id(struct rdma_cm_id
*id
)
836 struct rdma_id_private
*id_priv
;
837 enum cma_state state
;
839 id_priv
= container_of(id
, struct rdma_id_private
, id
);
840 state
= cma_exch(id_priv
, CMA_DESTROYING
);
841 cma_cancel_operation(id_priv
, state
);
844 if (id_priv
->cma_dev
) {
846 switch (rdma_node_get_transport(id
->device
->node_type
)) {
847 case RDMA_TRANSPORT_IB
:
848 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
849 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
851 case RDMA_TRANSPORT_IWARP
:
852 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
853 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
858 cma_leave_mc_groups(id_priv
);
860 cma_detach_from_dev(id_priv
);
864 cma_release_port(id_priv
);
865 cma_deref_id(id_priv
);
866 wait_for_completion(&id_priv
->comp
);
868 if (id_priv
->internal_id
)
869 cma_deref_id(id_priv
->id
.context
);
871 kfree(id_priv
->id
.route
.path_rec
);
874 EXPORT_SYMBOL(rdma_destroy_id
);
876 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
880 ret
= cma_modify_qp_rtr(id_priv
, NULL
);
884 ret
= cma_modify_qp_rts(id_priv
, NULL
);
888 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
894 cma_modify_qp_err(id_priv
);
895 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
900 static int cma_verify_rep(struct rdma_id_private
*id_priv
, void *data
)
902 if (id_priv
->id
.ps
== RDMA_PS_SDP
&&
903 sdp_get_majv(((struct sdp_hah
*) data
)->sdp_version
) !=
910 static void cma_set_rep_event_data(struct rdma_cm_event
*event
,
911 struct ib_cm_rep_event_param
*rep_data
,
914 event
->param
.conn
.private_data
= private_data
;
915 event
->param
.conn
.private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
916 event
->param
.conn
.responder_resources
= rep_data
->responder_resources
;
917 event
->param
.conn
.initiator_depth
= rep_data
->initiator_depth
;
918 event
->param
.conn
.flow_control
= rep_data
->flow_control
;
919 event
->param
.conn
.rnr_retry_count
= rep_data
->rnr_retry_count
;
920 event
->param
.conn
.srq
= rep_data
->srq
;
921 event
->param
.conn
.qp_num
= rep_data
->remote_qpn
;
924 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
926 struct rdma_id_private
*id_priv
= cm_id
->context
;
927 struct rdma_cm_event event
;
930 if (cma_disable_remove(id_priv
, CMA_CONNECT
))
933 memset(&event
, 0, sizeof event
);
934 switch (ib_event
->event
) {
935 case IB_CM_REQ_ERROR
:
936 case IB_CM_REP_ERROR
:
937 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
938 event
.status
= -ETIMEDOUT
;
940 case IB_CM_REP_RECEIVED
:
941 event
.status
= cma_verify_rep(id_priv
, ib_event
->private_data
);
943 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
944 else if (id_priv
->id
.qp
&& id_priv
->id
.ps
!= RDMA_PS_SDP
) {
945 event
.status
= cma_rep_recv(id_priv
);
946 event
.event
= event
.status
? RDMA_CM_EVENT_CONNECT_ERROR
:
947 RDMA_CM_EVENT_ESTABLISHED
;
949 event
.event
= RDMA_CM_EVENT_CONNECT_RESPONSE
;
950 cma_set_rep_event_data(&event
, &ib_event
->param
.rep_rcvd
,
951 ib_event
->private_data
);
953 case IB_CM_RTU_RECEIVED
:
954 case IB_CM_USER_ESTABLISHED
:
955 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
957 case IB_CM_DREQ_ERROR
:
958 event
.status
= -ETIMEDOUT
; /* fall through */
959 case IB_CM_DREQ_RECEIVED
:
960 case IB_CM_DREP_RECEIVED
:
961 if (!cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_DISCONNECT
))
963 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
965 case IB_CM_TIMEWAIT_EXIT
:
966 case IB_CM_MRA_RECEIVED
:
969 case IB_CM_REJ_RECEIVED
:
970 cma_modify_qp_err(id_priv
);
971 event
.status
= ib_event
->param
.rej_rcvd
.reason
;
972 event
.event
= RDMA_CM_EVENT_REJECTED
;
973 event
.param
.conn
.private_data
= ib_event
->private_data
;
974 event
.param
.conn
.private_data_len
= IB_CM_REJ_PRIVATE_DATA_SIZE
;
977 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
982 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
984 /* Destroy the CM ID by returning a non-zero value. */
985 id_priv
->cm_id
.ib
= NULL
;
986 cma_exch(id_priv
, CMA_DESTROYING
);
987 cma_enable_remove(id_priv
);
988 rdma_destroy_id(&id_priv
->id
);
992 cma_enable_remove(id_priv
);
996 static struct rdma_id_private
*cma_new_conn_id(struct rdma_cm_id
*listen_id
,
997 struct ib_cm_event
*ib_event
)
999 struct rdma_id_private
*id_priv
;
1000 struct rdma_cm_id
*id
;
1001 struct rdma_route
*rt
;
1002 union cma_ip_addr
*src
, *dst
;
1006 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
1007 &ip_ver
, &port
, &src
, &dst
))
1010 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
1015 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
1016 ip_ver
, port
, src
, dst
);
1019 rt
->num_paths
= ib_event
->param
.req_rcvd
.alternate_path
? 2 : 1;
1020 rt
->path_rec
= kmalloc(sizeof *rt
->path_rec
* rt
->num_paths
,
1025 rt
->path_rec
[0] = *ib_event
->param
.req_rcvd
.primary_path
;
1026 if (rt
->num_paths
== 2)
1027 rt
->path_rec
[1] = *ib_event
->param
.req_rcvd
.alternate_path
;
1029 ib_addr_set_sgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].sgid
);
1030 ib_addr_set_dgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].dgid
);
1031 ib_addr_set_pkey(&rt
->addr
.dev_addr
, be16_to_cpu(rt
->path_rec
[0].pkey
));
1032 rt
->addr
.dev_addr
.dev_type
= RDMA_NODE_IB_CA
;
1034 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1035 id_priv
->state
= CMA_CONNECT
;
1039 rdma_destroy_id(id
);
1044 static struct rdma_id_private
*cma_new_udp_id(struct rdma_cm_id
*listen_id
,
1045 struct ib_cm_event
*ib_event
)
1047 struct rdma_id_private
*id_priv
;
1048 struct rdma_cm_id
*id
;
1049 union cma_ip_addr
*src
, *dst
;
1054 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
1060 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
1061 &ip_ver
, &port
, &src
, &dst
))
1064 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
1065 ip_ver
, port
, src
, dst
);
1067 ret
= rdma_translate_ip(&id
->route
.addr
.src_addr
,
1068 &id
->route
.addr
.dev_addr
);
1072 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1073 id_priv
->state
= CMA_CONNECT
;
1076 rdma_destroy_id(id
);
1080 static void cma_set_req_event_data(struct rdma_cm_event
*event
,
1081 struct ib_cm_req_event_param
*req_data
,
1082 void *private_data
, int offset
)
1084 event
->param
.conn
.private_data
= private_data
+ offset
;
1085 event
->param
.conn
.private_data_len
= IB_CM_REQ_PRIVATE_DATA_SIZE
- offset
;
1086 event
->param
.conn
.responder_resources
= req_data
->responder_resources
;
1087 event
->param
.conn
.initiator_depth
= req_data
->initiator_depth
;
1088 event
->param
.conn
.flow_control
= req_data
->flow_control
;
1089 event
->param
.conn
.retry_count
= req_data
->retry_count
;
1090 event
->param
.conn
.rnr_retry_count
= req_data
->rnr_retry_count
;
1091 event
->param
.conn
.srq
= req_data
->srq
;
1092 event
->param
.conn
.qp_num
= req_data
->remote_qpn
;
1095 static int cma_req_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
1097 struct rdma_id_private
*listen_id
, *conn_id
;
1098 struct rdma_cm_event event
;
1101 listen_id
= cm_id
->context
;
1102 if (cma_disable_remove(listen_id
, CMA_LISTEN
))
1103 return -ECONNABORTED
;
1105 memset(&event
, 0, sizeof event
);
1106 offset
= cma_user_data_offset(listen_id
->id
.ps
);
1107 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1108 if (cma_is_ud_ps(listen_id
->id
.ps
)) {
1109 conn_id
= cma_new_udp_id(&listen_id
->id
, ib_event
);
1110 event
.param
.ud
.private_data
= ib_event
->private_data
+ offset
;
1111 event
.param
.ud
.private_data_len
=
1112 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
- offset
;
1114 conn_id
= cma_new_conn_id(&listen_id
->id
, ib_event
);
1115 cma_set_req_event_data(&event
, &ib_event
->param
.req_rcvd
,
1116 ib_event
->private_data
, offset
);
1123 atomic_inc(&conn_id
->dev_remove
);
1125 ret
= cma_acquire_dev(conn_id
);
1126 mutex_unlock(&lock
);
1128 goto release_conn_id
;
1130 conn_id
->cm_id
.ib
= cm_id
;
1131 cm_id
->context
= conn_id
;
1132 cm_id
->cm_handler
= cma_ib_handler
;
1134 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1137 * Acquire mutex to prevent user executing rdma_destroy_id()
1138 * while we're accessing the cm_id.
1141 if (cma_comp(conn_id
, CMA_CONNECT
) &&
1142 !cma_is_ud_ps(conn_id
->id
.ps
))
1143 ib_send_cm_mra(cm_id
, CMA_CM_MRA_SETTING
, NULL
, 0);
1144 mutex_unlock(&lock
);
1145 cma_enable_remove(conn_id
);
1149 /* Destroy the CM ID by returning a non-zero value. */
1150 conn_id
->cm_id
.ib
= NULL
;
1153 cma_exch(conn_id
, CMA_DESTROYING
);
1154 cma_enable_remove(conn_id
);
1155 rdma_destroy_id(&conn_id
->id
);
1158 cma_enable_remove(listen_id
);
1162 static __be64
cma_get_service_id(enum rdma_port_space ps
, struct sockaddr
*addr
)
1164 return cpu_to_be64(((u64
)ps
<< 16) + be16_to_cpu(cma_port(addr
)));
1167 static void cma_set_compare_data(enum rdma_port_space ps
, struct sockaddr
*addr
,
1168 struct ib_cm_compare_data
*compare
)
1170 struct cma_hdr
*cma_data
, *cma_mask
;
1171 struct sdp_hh
*sdp_data
, *sdp_mask
;
1173 struct in6_addr ip6_addr
;
1175 memset(compare
, 0, sizeof *compare
);
1176 cma_data
= (void *) compare
->data
;
1177 cma_mask
= (void *) compare
->mask
;
1178 sdp_data
= (void *) compare
->data
;
1179 sdp_mask
= (void *) compare
->mask
;
1181 switch (addr
->sa_family
) {
1183 ip4_addr
= ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
;
1184 if (ps
== RDMA_PS_SDP
) {
1185 sdp_set_ip_ver(sdp_data
, 4);
1186 sdp_set_ip_ver(sdp_mask
, 0xF);
1187 sdp_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1188 sdp_mask
->dst_addr
.ip4
.addr
= htonl(~0);
1190 cma_set_ip_ver(cma_data
, 4);
1191 cma_set_ip_ver(cma_mask
, 0xF);
1192 cma_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1193 cma_mask
->dst_addr
.ip4
.addr
= htonl(~0);
1197 ip6_addr
= ((struct sockaddr_in6
*) addr
)->sin6_addr
;
1198 if (ps
== RDMA_PS_SDP
) {
1199 sdp_set_ip_ver(sdp_data
, 6);
1200 sdp_set_ip_ver(sdp_mask
, 0xF);
1201 sdp_data
->dst_addr
.ip6
= ip6_addr
;
1202 memset(&sdp_mask
->dst_addr
.ip6
, 0xFF,
1203 sizeof sdp_mask
->dst_addr
.ip6
);
1205 cma_set_ip_ver(cma_data
, 6);
1206 cma_set_ip_ver(cma_mask
, 0xF);
1207 cma_data
->dst_addr
.ip6
= ip6_addr
;
1208 memset(&cma_mask
->dst_addr
.ip6
, 0xFF,
1209 sizeof cma_mask
->dst_addr
.ip6
);
1217 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1219 struct rdma_id_private
*id_priv
= iw_id
->context
;
1220 struct rdma_cm_event event
;
1221 struct sockaddr_in
*sin
;
1224 if (cma_disable_remove(id_priv
, CMA_CONNECT
))
1227 memset(&event
, 0, sizeof event
);
1228 switch (iw_event
->event
) {
1229 case IW_CM_EVENT_CLOSE
:
1230 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
1232 case IW_CM_EVENT_CONNECT_REPLY
:
1233 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1234 *sin
= iw_event
->local_addr
;
1235 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1236 *sin
= iw_event
->remote_addr
;
1237 switch (iw_event
->status
) {
1239 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1243 event
.event
= RDMA_CM_EVENT_REJECTED
;
1246 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1249 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
1253 case IW_CM_EVENT_ESTABLISHED
:
1254 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1260 event
.status
= iw_event
->status
;
1261 event
.param
.conn
.private_data
= iw_event
->private_data
;
1262 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1263 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
1265 /* Destroy the CM ID by returning a non-zero value. */
1266 id_priv
->cm_id
.iw
= NULL
;
1267 cma_exch(id_priv
, CMA_DESTROYING
);
1268 cma_enable_remove(id_priv
);
1269 rdma_destroy_id(&id_priv
->id
);
1273 cma_enable_remove(id_priv
);
1277 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
1278 struct iw_cm_event
*iw_event
)
1280 struct rdma_cm_id
*new_cm_id
;
1281 struct rdma_id_private
*listen_id
, *conn_id
;
1282 struct sockaddr_in
*sin
;
1283 struct net_device
*dev
= NULL
;
1284 struct rdma_cm_event event
;
1286 struct ib_device_attr attr
;
1288 listen_id
= cm_id
->context
;
1289 if (cma_disable_remove(listen_id
, CMA_LISTEN
))
1290 return -ECONNABORTED
;
1292 /* Create a new RDMA id for the new IW CM ID */
1293 new_cm_id
= rdma_create_id(listen_id
->id
.event_handler
,
1294 listen_id
->id
.context
,
1296 if (IS_ERR(new_cm_id
)) {
1300 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
1301 atomic_inc(&conn_id
->dev_remove
);
1302 conn_id
->state
= CMA_CONNECT
;
1304 dev
= ip_dev_find(&init_net
, iw_event
->local_addr
.sin_addr
.s_addr
);
1306 ret
= -EADDRNOTAVAIL
;
1307 cma_enable_remove(conn_id
);
1308 rdma_destroy_id(new_cm_id
);
1311 ret
= rdma_copy_addr(&conn_id
->id
.route
.addr
.dev_addr
, dev
, NULL
);
1313 cma_enable_remove(conn_id
);
1314 rdma_destroy_id(new_cm_id
);
1319 ret
= cma_acquire_dev(conn_id
);
1320 mutex_unlock(&lock
);
1322 cma_enable_remove(conn_id
);
1323 rdma_destroy_id(new_cm_id
);
1327 conn_id
->cm_id
.iw
= cm_id
;
1328 cm_id
->context
= conn_id
;
1329 cm_id
->cm_handler
= cma_iw_handler
;
1331 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.src_addr
;
1332 *sin
= iw_event
->local_addr
;
1333 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.dst_addr
;
1334 *sin
= iw_event
->remote_addr
;
1336 ret
= ib_query_device(conn_id
->id
.device
, &attr
);
1338 cma_enable_remove(conn_id
);
1339 rdma_destroy_id(new_cm_id
);
1343 memset(&event
, 0, sizeof event
);
1344 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1345 event
.param
.conn
.private_data
= iw_event
->private_data
;
1346 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1347 event
.param
.conn
.initiator_depth
= attr
.max_qp_init_rd_atom
;
1348 event
.param
.conn
.responder_resources
= attr
.max_qp_rd_atom
;
1349 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1351 /* User wants to destroy the CM ID */
1352 conn_id
->cm_id
.iw
= NULL
;
1353 cma_exch(conn_id
, CMA_DESTROYING
);
1354 cma_enable_remove(conn_id
);
1355 rdma_destroy_id(&conn_id
->id
);
1361 cma_enable_remove(listen_id
);
1365 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
1367 struct ib_cm_compare_data compare_data
;
1368 struct sockaddr
*addr
;
1372 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_req_handler
,
1374 if (IS_ERR(id_priv
->cm_id
.ib
))
1375 return PTR_ERR(id_priv
->cm_id
.ib
);
1377 addr
= &id_priv
->id
.route
.addr
.src_addr
;
1378 svc_id
= cma_get_service_id(id_priv
->id
.ps
, addr
);
1379 if (cma_any_addr(addr
))
1380 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, NULL
);
1382 cma_set_compare_data(id_priv
->id
.ps
, addr
, &compare_data
);
1383 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, &compare_data
);
1387 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1388 id_priv
->cm_id
.ib
= NULL
;
1394 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
1397 struct sockaddr_in
*sin
;
1399 id_priv
->cm_id
.iw
= iw_create_cm_id(id_priv
->id
.device
,
1400 iw_conn_req_handler
,
1402 if (IS_ERR(id_priv
->cm_id
.iw
))
1403 return PTR_ERR(id_priv
->cm_id
.iw
);
1405 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1406 id_priv
->cm_id
.iw
->local_addr
= *sin
;
1408 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
1411 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1412 id_priv
->cm_id
.iw
= NULL
;
1418 static int cma_listen_handler(struct rdma_cm_id
*id
,
1419 struct rdma_cm_event
*event
)
1421 struct rdma_id_private
*id_priv
= id
->context
;
1423 id
->context
= id_priv
->id
.context
;
1424 id
->event_handler
= id_priv
->id
.event_handler
;
1425 return id_priv
->id
.event_handler(id
, event
);
1428 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
1429 struct cma_device
*cma_dev
)
1431 struct rdma_id_private
*dev_id_priv
;
1432 struct rdma_cm_id
*id
;
1435 id
= rdma_create_id(cma_listen_handler
, id_priv
, id_priv
->id
.ps
);
1439 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
1441 dev_id_priv
->state
= CMA_ADDR_BOUND
;
1442 memcpy(&id
->route
.addr
.src_addr
, &id_priv
->id
.route
.addr
.src_addr
,
1443 ip_addr_size(&id_priv
->id
.route
.addr
.src_addr
));
1445 cma_attach_to_dev(dev_id_priv
, cma_dev
);
1446 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
1447 atomic_inc(&id_priv
->refcount
);
1448 dev_id_priv
->internal_id
= 1;
1450 ret
= rdma_listen(id
, id_priv
->backlog
);
1452 printk(KERN_WARNING
"RDMA CMA: cma_listen_on_dev, error %d, "
1453 "listening on device %s", ret
, cma_dev
->device
->name
);
1456 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
1458 struct cma_device
*cma_dev
;
1461 list_add_tail(&id_priv
->list
, &listen_any_list
);
1462 list_for_each_entry(cma_dev
, &dev_list
, list
)
1463 cma_listen_on_dev(id_priv
, cma_dev
);
1464 mutex_unlock(&lock
);
1467 static int cma_bind_any(struct rdma_cm_id
*id
, sa_family_t af
)
1469 struct sockaddr_in addr_in
;
1471 memset(&addr_in
, 0, sizeof addr_in
);
1472 addr_in
.sin_family
= af
;
1473 return rdma_bind_addr(id
, (struct sockaddr
*) &addr_in
);
1476 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
1478 struct rdma_id_private
*id_priv
;
1481 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1482 if (id_priv
->state
== CMA_IDLE
) {
1483 ret
= cma_bind_any(id
, AF_INET
);
1488 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_LISTEN
))
1491 id_priv
->backlog
= backlog
;
1493 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1494 case RDMA_TRANSPORT_IB
:
1495 ret
= cma_ib_listen(id_priv
);
1499 case RDMA_TRANSPORT_IWARP
:
1500 ret
= cma_iw_listen(id_priv
, backlog
);
1509 cma_listen_on_all(id_priv
);
1513 id_priv
->backlog
= 0;
1514 cma_comp_exch(id_priv
, CMA_LISTEN
, CMA_ADDR_BOUND
);
1517 EXPORT_SYMBOL(rdma_listen
);
1519 void rdma_set_service_type(struct rdma_cm_id
*id
, int tos
)
1521 struct rdma_id_private
*id_priv
;
1523 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1524 id_priv
->tos
= (u8
) tos
;
1526 EXPORT_SYMBOL(rdma_set_service_type
);
1528 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
1531 struct cma_work
*work
= context
;
1532 struct rdma_route
*route
;
1534 route
= &work
->id
->id
.route
;
1537 route
->num_paths
= 1;
1538 *route
->path_rec
= *path_rec
;
1540 work
->old_state
= CMA_ROUTE_QUERY
;
1541 work
->new_state
= CMA_ADDR_RESOLVED
;
1542 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
1543 work
->event
.status
= status
;
1546 queue_work(cma_wq
, &work
->work
);
1549 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
1550 struct cma_work
*work
)
1552 struct rdma_addr
*addr
= &id_priv
->id
.route
.addr
;
1553 struct ib_sa_path_rec path_rec
;
1554 ib_sa_comp_mask comp_mask
;
1555 struct sockaddr_in6
*sin6
;
1557 memset(&path_rec
, 0, sizeof path_rec
);
1558 ib_addr_get_sgid(&addr
->dev_addr
, &path_rec
.sgid
);
1559 ib_addr_get_dgid(&addr
->dev_addr
, &path_rec
.dgid
);
1560 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(&addr
->dev_addr
));
1561 path_rec
.numb_path
= 1;
1562 path_rec
.reversible
= 1;
1563 path_rec
.service_id
= cma_get_service_id(id_priv
->id
.ps
, &addr
->dst_addr
);
1565 comp_mask
= IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
1566 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
|
1567 IB_SA_PATH_REC_REVERSIBLE
| IB_SA_PATH_REC_SERVICE_ID
;
1569 if (addr
->src_addr
.sa_family
== AF_INET
) {
1570 path_rec
.qos_class
= cpu_to_be16((u16
) id_priv
->tos
);
1571 comp_mask
|= IB_SA_PATH_REC_QOS_CLASS
;
1573 sin6
= (struct sockaddr_in6
*) &addr
->src_addr
;
1574 path_rec
.traffic_class
= (u8
) (be32_to_cpu(sin6
->sin6_flowinfo
) >> 20);
1575 comp_mask
|= IB_SA_PATH_REC_TRAFFIC_CLASS
;
1578 id_priv
->query_id
= ib_sa_path_rec_get(&sa_client
, id_priv
->id
.device
,
1579 id_priv
->id
.port_num
, &path_rec
,
1580 comp_mask
, timeout_ms
,
1581 GFP_KERNEL
, cma_query_handler
,
1582 work
, &id_priv
->query
);
1584 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
1587 static void cma_work_handler(struct work_struct
*_work
)
1589 struct cma_work
*work
= container_of(_work
, struct cma_work
, work
);
1590 struct rdma_id_private
*id_priv
= work
->id
;
1593 atomic_inc(&id_priv
->dev_remove
);
1594 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
1597 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
1598 cma_exch(id_priv
, CMA_DESTROYING
);
1602 cma_enable_remove(id_priv
);
1603 cma_deref_id(id_priv
);
1605 rdma_destroy_id(&id_priv
->id
);
1609 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1611 struct rdma_route
*route
= &id_priv
->id
.route
;
1612 struct cma_work
*work
;
1615 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1620 INIT_WORK(&work
->work
, cma_work_handler
);
1621 work
->old_state
= CMA_ROUTE_QUERY
;
1622 work
->new_state
= CMA_ROUTE_RESOLVED
;
1623 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1625 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
1626 if (!route
->path_rec
) {
1631 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
1637 kfree(route
->path_rec
);
1638 route
->path_rec
= NULL
;
1644 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
1645 struct ib_sa_path_rec
*path_rec
, int num_paths
)
1647 struct rdma_id_private
*id_priv
;
1650 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1651 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_RESOLVED
))
1654 id
->route
.path_rec
= kmalloc(sizeof *path_rec
* num_paths
, GFP_KERNEL
);
1655 if (!id
->route
.path_rec
) {
1660 memcpy(id
->route
.path_rec
, path_rec
, sizeof *path_rec
* num_paths
);
1663 cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_ADDR_RESOLVED
);
1666 EXPORT_SYMBOL(rdma_set_ib_paths
);
1668 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1670 struct cma_work
*work
;
1672 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1677 INIT_WORK(&work
->work
, cma_work_handler
);
1678 work
->old_state
= CMA_ROUTE_QUERY
;
1679 work
->new_state
= CMA_ROUTE_RESOLVED
;
1680 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1681 queue_work(cma_wq
, &work
->work
);
1685 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
1687 struct rdma_id_private
*id_priv
;
1690 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1691 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_QUERY
))
1694 atomic_inc(&id_priv
->refcount
);
1695 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1696 case RDMA_TRANSPORT_IB
:
1697 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
1699 case RDMA_TRANSPORT_IWARP
:
1700 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
1711 cma_comp_exch(id_priv
, CMA_ROUTE_QUERY
, CMA_ADDR_RESOLVED
);
1712 cma_deref_id(id_priv
);
1715 EXPORT_SYMBOL(rdma_resolve_route
);
1717 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
1719 struct cma_device
*cma_dev
;
1720 struct ib_port_attr port_attr
;
1727 if (list_empty(&dev_list
)) {
1731 list_for_each_entry(cma_dev
, &dev_list
, list
)
1732 for (p
= 1; p
<= cma_dev
->device
->phys_port_cnt
; ++p
)
1733 if (!ib_query_port(cma_dev
->device
, p
, &port_attr
) &&
1734 port_attr
.state
== IB_PORT_ACTIVE
)
1738 cma_dev
= list_entry(dev_list
.next
, struct cma_device
, list
);
1741 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
);
1745 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
1749 ib_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1750 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
1751 id_priv
->id
.port_num
= p
;
1752 cma_attach_to_dev(id_priv
, cma_dev
);
1754 mutex_unlock(&lock
);
1758 static void addr_handler(int status
, struct sockaddr
*src_addr
,
1759 struct rdma_dev_addr
*dev_addr
, void *context
)
1761 struct rdma_id_private
*id_priv
= context
;
1762 struct rdma_cm_event event
;
1764 memset(&event
, 0, sizeof event
);
1765 atomic_inc(&id_priv
->dev_remove
);
1768 * Grab mutex to block rdma_destroy_id() from removing the device while
1769 * we're trying to acquire it.
1772 if (!cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_RESOLVED
)) {
1773 mutex_unlock(&lock
);
1777 if (!status
&& !id_priv
->cma_dev
)
1778 status
= cma_acquire_dev(id_priv
);
1779 mutex_unlock(&lock
);
1782 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ADDR_BOUND
))
1784 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
1785 event
.status
= status
;
1787 memcpy(&id_priv
->id
.route
.addr
.src_addr
, src_addr
,
1788 ip_addr_size(src_addr
));
1789 event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1792 if (id_priv
->id
.event_handler(&id_priv
->id
, &event
)) {
1793 cma_exch(id_priv
, CMA_DESTROYING
);
1794 cma_enable_remove(id_priv
);
1795 cma_deref_id(id_priv
);
1796 rdma_destroy_id(&id_priv
->id
);
1800 cma_enable_remove(id_priv
);
1801 cma_deref_id(id_priv
);
1804 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
1806 struct cma_work
*work
;
1807 struct sockaddr_in
*src_in
, *dst_in
;
1811 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1815 if (!id_priv
->cma_dev
) {
1816 ret
= cma_bind_loopback(id_priv
);
1821 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1822 ib_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1824 if (cma_zero_addr(&id_priv
->id
.route
.addr
.src_addr
)) {
1825 src_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.src_addr
;
1826 dst_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.dst_addr
;
1827 src_in
->sin_family
= dst_in
->sin_family
;
1828 src_in
->sin_addr
.s_addr
= dst_in
->sin_addr
.s_addr
;
1832 INIT_WORK(&work
->work
, cma_work_handler
);
1833 work
->old_state
= CMA_ADDR_QUERY
;
1834 work
->new_state
= CMA_ADDR_RESOLVED
;
1835 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1836 queue_work(cma_wq
, &work
->work
);
1843 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1844 struct sockaddr
*dst_addr
)
1846 if (src_addr
&& src_addr
->sa_family
)
1847 return rdma_bind_addr(id
, src_addr
);
1849 return cma_bind_any(id
, dst_addr
->sa_family
);
1852 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1853 struct sockaddr
*dst_addr
, int timeout_ms
)
1855 struct rdma_id_private
*id_priv
;
1858 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1859 if (id_priv
->state
== CMA_IDLE
) {
1860 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
1865 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_ADDR_QUERY
))
1868 atomic_inc(&id_priv
->refcount
);
1869 memcpy(&id
->route
.addr
.dst_addr
, dst_addr
, ip_addr_size(dst_addr
));
1870 if (cma_any_addr(dst_addr
))
1871 ret
= cma_resolve_loopback(id_priv
);
1873 ret
= rdma_resolve_ip(&addr_client
, &id
->route
.addr
.src_addr
,
1874 dst_addr
, &id
->route
.addr
.dev_addr
,
1875 timeout_ms
, addr_handler
, id_priv
);
1881 cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_BOUND
);
1882 cma_deref_id(id_priv
);
1885 EXPORT_SYMBOL(rdma_resolve_addr
);
1887 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
1888 struct rdma_id_private
*id_priv
)
1890 struct sockaddr_in
*sin
;
1892 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1893 sin
->sin_port
= htons(bind_list
->port
);
1894 id_priv
->bind_list
= bind_list
;
1895 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
1898 static int cma_alloc_port(struct idr
*ps
, struct rdma_id_private
*id_priv
,
1899 unsigned short snum
)
1901 struct rdma_bind_list
*bind_list
;
1904 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1909 ret
= idr_get_new_above(ps
, bind_list
, snum
, &port
);
1910 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1916 ret
= -EADDRNOTAVAIL
;
1921 bind_list
->port
= (unsigned short) port
;
1922 cma_bind_port(bind_list
, id_priv
);
1925 idr_remove(ps
, port
);
1931 static int cma_alloc_any_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1933 struct rdma_bind_list
*bind_list
;
1934 int port
, ret
, low
, high
;
1936 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1941 /* FIXME: add proper port randomization per like inet_csk_get_port */
1943 ret
= idr_get_new_above(ps
, bind_list
, next_port
, &port
);
1944 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1949 inet_get_local_port_range(&low
, &high
);
1951 if (next_port
!= low
) {
1952 idr_remove(ps
, port
);
1956 ret
= -EADDRNOTAVAIL
;
1963 next_port
= port
+ 1;
1966 bind_list
->port
= (unsigned short) port
;
1967 cma_bind_port(bind_list
, id_priv
);
1970 idr_remove(ps
, port
);
1976 static int cma_use_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1978 struct rdma_id_private
*cur_id
;
1979 struct sockaddr_in
*sin
, *cur_sin
;
1980 struct rdma_bind_list
*bind_list
;
1981 struct hlist_node
*node
;
1982 unsigned short snum
;
1984 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1985 snum
= ntohs(sin
->sin_port
);
1986 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
1989 bind_list
= idr_find(ps
, snum
);
1991 return cma_alloc_port(ps
, id_priv
, snum
);
1994 * We don't support binding to any address if anyone is bound to
1995 * a specific address on the same port.
1997 if (cma_any_addr(&id_priv
->id
.route
.addr
.src_addr
))
1998 return -EADDRNOTAVAIL
;
2000 hlist_for_each_entry(cur_id
, node
, &bind_list
->owners
, node
) {
2001 if (cma_any_addr(&cur_id
->id
.route
.addr
.src_addr
))
2002 return -EADDRNOTAVAIL
;
2004 cur_sin
= (struct sockaddr_in
*) &cur_id
->id
.route
.addr
.src_addr
;
2005 if (sin
->sin_addr
.s_addr
== cur_sin
->sin_addr
.s_addr
)
2009 cma_bind_port(bind_list
, id_priv
);
2013 static int cma_get_port(struct rdma_id_private
*id_priv
)
2018 switch (id_priv
->id
.ps
) {
2032 return -EPROTONOSUPPORT
;
2036 if (cma_any_port(&id_priv
->id
.route
.addr
.src_addr
))
2037 ret
= cma_alloc_any_port(ps
, id_priv
);
2039 ret
= cma_use_port(ps
, id_priv
);
2040 mutex_unlock(&lock
);
2045 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
2047 struct rdma_id_private
*id_priv
;
2050 if (addr
->sa_family
!= AF_INET
)
2051 return -EAFNOSUPPORT
;
2053 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2054 if (!cma_comp_exch(id_priv
, CMA_IDLE
, CMA_ADDR_BOUND
))
2057 if (!cma_any_addr(addr
)) {
2058 ret
= rdma_translate_ip(addr
, &id
->route
.addr
.dev_addr
);
2063 ret
= cma_acquire_dev(id_priv
);
2064 mutex_unlock(&lock
);
2069 memcpy(&id
->route
.addr
.src_addr
, addr
, ip_addr_size(addr
));
2070 ret
= cma_get_port(id_priv
);
2076 if (!cma_any_addr(addr
)) {
2078 cma_detach_from_dev(id_priv
);
2079 mutex_unlock(&lock
);
2082 cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_IDLE
);
2085 EXPORT_SYMBOL(rdma_bind_addr
);
2087 static int cma_format_hdr(void *hdr
, enum rdma_port_space ps
,
2088 struct rdma_route
*route
)
2090 struct sockaddr_in
*src4
, *dst4
;
2091 struct cma_hdr
*cma_hdr
;
2092 struct sdp_hh
*sdp_hdr
;
2094 src4
= (struct sockaddr_in
*) &route
->addr
.src_addr
;
2095 dst4
= (struct sockaddr_in
*) &route
->addr
.dst_addr
;
2100 if (sdp_get_majv(sdp_hdr
->sdp_version
) != SDP_MAJ_VERSION
)
2102 sdp_set_ip_ver(sdp_hdr
, 4);
2103 sdp_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2104 sdp_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2105 sdp_hdr
->port
= src4
->sin_port
;
2109 cma_hdr
->cma_version
= CMA_VERSION
;
2110 cma_set_ip_ver(cma_hdr
, 4);
2111 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2112 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2113 cma_hdr
->port
= src4
->sin_port
;
2119 static int cma_sidr_rep_handler(struct ib_cm_id
*cm_id
,
2120 struct ib_cm_event
*ib_event
)
2122 struct rdma_id_private
*id_priv
= cm_id
->context
;
2123 struct rdma_cm_event event
;
2124 struct ib_cm_sidr_rep_event_param
*rep
= &ib_event
->param
.sidr_rep_rcvd
;
2127 if (cma_disable_remove(id_priv
, CMA_CONNECT
))
2130 memset(&event
, 0, sizeof event
);
2131 switch (ib_event
->event
) {
2132 case IB_CM_SIDR_REQ_ERROR
:
2133 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2134 event
.status
= -ETIMEDOUT
;
2136 case IB_CM_SIDR_REP_RECEIVED
:
2137 event
.param
.ud
.private_data
= ib_event
->private_data
;
2138 event
.param
.ud
.private_data_len
= IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
;
2139 if (rep
->status
!= IB_SIDR_SUCCESS
) {
2140 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2141 event
.status
= ib_event
->param
.sidr_rep_rcvd
.status
;
2144 if (id_priv
->qkey
!= rep
->qkey
) {
2145 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2146 event
.status
= -EINVAL
;
2149 ib_init_ah_from_path(id_priv
->id
.device
, id_priv
->id
.port_num
,
2150 id_priv
->id
.route
.path_rec
,
2151 &event
.param
.ud
.ah_attr
);
2152 event
.param
.ud
.qp_num
= rep
->qpn
;
2153 event
.param
.ud
.qkey
= rep
->qkey
;
2154 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
2158 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d",
2163 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2165 /* Destroy the CM ID by returning a non-zero value. */
2166 id_priv
->cm_id
.ib
= NULL
;
2167 cma_exch(id_priv
, CMA_DESTROYING
);
2168 cma_enable_remove(id_priv
);
2169 rdma_destroy_id(&id_priv
->id
);
2173 cma_enable_remove(id_priv
);
2177 static int cma_resolve_ib_udp(struct rdma_id_private
*id_priv
,
2178 struct rdma_conn_param
*conn_param
)
2180 struct ib_cm_sidr_req_param req
;
2181 struct rdma_route
*route
;
2184 req
.private_data_len
= sizeof(struct cma_hdr
) +
2185 conn_param
->private_data_len
;
2186 req
.private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2187 if (!req
.private_data
)
2190 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2191 memcpy((void *) req
.private_data
+ sizeof(struct cma_hdr
),
2192 conn_param
->private_data
, conn_param
->private_data_len
);
2194 route
= &id_priv
->id
.route
;
2195 ret
= cma_format_hdr((void *) req
.private_data
, id_priv
->id
.ps
, route
);
2199 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
,
2200 cma_sidr_rep_handler
, id_priv
);
2201 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2202 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2206 req
.path
= route
->path_rec
;
2207 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2208 &route
->addr
.dst_addr
);
2209 req
.timeout_ms
= 1 << (CMA_CM_RESPONSE_TIMEOUT
- 8);
2210 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2212 ret
= ib_send_cm_sidr_req(id_priv
->cm_id
.ib
, &req
);
2214 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2215 id_priv
->cm_id
.ib
= NULL
;
2218 kfree(req
.private_data
);
2222 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
2223 struct rdma_conn_param
*conn_param
)
2225 struct ib_cm_req_param req
;
2226 struct rdma_route
*route
;
2230 memset(&req
, 0, sizeof req
);
2231 offset
= cma_user_data_offset(id_priv
->id
.ps
);
2232 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
2233 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2237 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2238 memcpy(private_data
+ offset
, conn_param
->private_data
,
2239 conn_param
->private_data_len
);
2241 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
,
2243 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2244 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2248 route
= &id_priv
->id
.route
;
2249 ret
= cma_format_hdr(private_data
, id_priv
->id
.ps
, route
);
2252 req
.private_data
= private_data
;
2254 req
.primary_path
= &route
->path_rec
[0];
2255 if (route
->num_paths
== 2)
2256 req
.alternate_path
= &route
->path_rec
[1];
2258 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2259 &route
->addr
.dst_addr
);
2260 req
.qp_num
= id_priv
->qp_num
;
2261 req
.qp_type
= IB_QPT_RC
;
2262 req
.starting_psn
= id_priv
->seq_num
;
2263 req
.responder_resources
= conn_param
->responder_resources
;
2264 req
.initiator_depth
= conn_param
->initiator_depth
;
2265 req
.flow_control
= conn_param
->flow_control
;
2266 req
.retry_count
= conn_param
->retry_count
;
2267 req
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2268 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2269 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2270 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2271 req
.srq
= id_priv
->srq
? 1 : 0;
2273 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
2275 if (ret
&& !IS_ERR(id_priv
->cm_id
.ib
)) {
2276 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2277 id_priv
->cm_id
.ib
= NULL
;
2280 kfree(private_data
);
2284 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
2285 struct rdma_conn_param
*conn_param
)
2287 struct iw_cm_id
*cm_id
;
2288 struct sockaddr_in
* sin
;
2290 struct iw_cm_conn_param iw_param
;
2292 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
2293 if (IS_ERR(cm_id
)) {
2294 ret
= PTR_ERR(cm_id
);
2298 id_priv
->cm_id
.iw
= cm_id
;
2300 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
2301 cm_id
->local_addr
= *sin
;
2303 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
2304 cm_id
->remote_addr
= *sin
;
2306 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
2310 iw_param
.ord
= conn_param
->initiator_depth
;
2311 iw_param
.ird
= conn_param
->responder_resources
;
2312 iw_param
.private_data
= conn_param
->private_data
;
2313 iw_param
.private_data_len
= conn_param
->private_data_len
;
2315 iw_param
.qpn
= id_priv
->qp_num
;
2317 iw_param
.qpn
= conn_param
->qp_num
;
2318 ret
= iw_cm_connect(cm_id
, &iw_param
);
2320 if (ret
&& !IS_ERR(cm_id
)) {
2321 iw_destroy_cm_id(cm_id
);
2322 id_priv
->cm_id
.iw
= NULL
;
2327 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2329 struct rdma_id_private
*id_priv
;
2332 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2333 if (!cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_CONNECT
))
2337 id_priv
->qp_num
= conn_param
->qp_num
;
2338 id_priv
->srq
= conn_param
->srq
;
2341 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2342 case RDMA_TRANSPORT_IB
:
2343 if (cma_is_ud_ps(id
->ps
))
2344 ret
= cma_resolve_ib_udp(id_priv
, conn_param
);
2346 ret
= cma_connect_ib(id_priv
, conn_param
);
2348 case RDMA_TRANSPORT_IWARP
:
2349 ret
= cma_connect_iw(id_priv
, conn_param
);
2360 cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_ROUTE_RESOLVED
);
2363 EXPORT_SYMBOL(rdma_connect
);
2365 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
2366 struct rdma_conn_param
*conn_param
)
2368 struct ib_cm_rep_param rep
;
2371 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
2375 ret
= cma_modify_qp_rts(id_priv
, conn_param
);
2379 memset(&rep
, 0, sizeof rep
);
2380 rep
.qp_num
= id_priv
->qp_num
;
2381 rep
.starting_psn
= id_priv
->seq_num
;
2382 rep
.private_data
= conn_param
->private_data
;
2383 rep
.private_data_len
= conn_param
->private_data_len
;
2384 rep
.responder_resources
= conn_param
->responder_resources
;
2385 rep
.initiator_depth
= conn_param
->initiator_depth
;
2386 rep
.failover_accepted
= 0;
2387 rep
.flow_control
= conn_param
->flow_control
;
2388 rep
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2389 rep
.srq
= id_priv
->srq
? 1 : 0;
2391 ret
= ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
2396 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
2397 struct rdma_conn_param
*conn_param
)
2399 struct iw_cm_conn_param iw_param
;
2402 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
2406 iw_param
.ord
= conn_param
->initiator_depth
;
2407 iw_param
.ird
= conn_param
->responder_resources
;
2408 iw_param
.private_data
= conn_param
->private_data
;
2409 iw_param
.private_data_len
= conn_param
->private_data_len
;
2410 if (id_priv
->id
.qp
) {
2411 iw_param
.qpn
= id_priv
->qp_num
;
2413 iw_param
.qpn
= conn_param
->qp_num
;
2415 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
2418 static int cma_send_sidr_rep(struct rdma_id_private
*id_priv
,
2419 enum ib_cm_sidr_status status
,
2420 const void *private_data
, int private_data_len
)
2422 struct ib_cm_sidr_rep_param rep
;
2424 memset(&rep
, 0, sizeof rep
);
2425 rep
.status
= status
;
2426 if (status
== IB_SIDR_SUCCESS
) {
2427 rep
.qp_num
= id_priv
->qp_num
;
2428 rep
.qkey
= id_priv
->qkey
;
2430 rep
.private_data
= private_data
;
2431 rep
.private_data_len
= private_data_len
;
2433 return ib_send_cm_sidr_rep(id_priv
->cm_id
.ib
, &rep
);
2436 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2438 struct rdma_id_private
*id_priv
;
2441 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2442 if (!cma_comp(id_priv
, CMA_CONNECT
))
2445 if (!id
->qp
&& conn_param
) {
2446 id_priv
->qp_num
= conn_param
->qp_num
;
2447 id_priv
->srq
= conn_param
->srq
;
2450 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2451 case RDMA_TRANSPORT_IB
:
2452 if (cma_is_ud_ps(id
->ps
))
2453 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
2454 conn_param
->private_data
,
2455 conn_param
->private_data_len
);
2456 else if (conn_param
)
2457 ret
= cma_accept_ib(id_priv
, conn_param
);
2459 ret
= cma_rep_recv(id_priv
);
2461 case RDMA_TRANSPORT_IWARP
:
2462 ret
= cma_accept_iw(id_priv
, conn_param
);
2474 cma_modify_qp_err(id_priv
);
2475 rdma_reject(id
, NULL
, 0);
2478 EXPORT_SYMBOL(rdma_accept
);
2480 int rdma_notify(struct rdma_cm_id
*id
, enum ib_event_type event
)
2482 struct rdma_id_private
*id_priv
;
2485 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2486 if (!cma_has_cm_dev(id_priv
))
2489 switch (id
->device
->node_type
) {
2490 case RDMA_NODE_IB_CA
:
2491 ret
= ib_cm_notify(id_priv
->cm_id
.ib
, event
);
2499 EXPORT_SYMBOL(rdma_notify
);
2501 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
2502 u8 private_data_len
)
2504 struct rdma_id_private
*id_priv
;
2507 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2508 if (!cma_has_cm_dev(id_priv
))
2511 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2512 case RDMA_TRANSPORT_IB
:
2513 if (cma_is_ud_ps(id
->ps
))
2514 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_REJECT
,
2515 private_data
, private_data_len
);
2517 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
2518 IB_CM_REJ_CONSUMER_DEFINED
, NULL
,
2519 0, private_data
, private_data_len
);
2521 case RDMA_TRANSPORT_IWARP
:
2522 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
2523 private_data
, private_data_len
);
2531 EXPORT_SYMBOL(rdma_reject
);
2533 int rdma_disconnect(struct rdma_cm_id
*id
)
2535 struct rdma_id_private
*id_priv
;
2538 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2539 if (!cma_has_cm_dev(id_priv
))
2542 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2543 case RDMA_TRANSPORT_IB
:
2544 ret
= cma_modify_qp_err(id_priv
);
2547 /* Initiate or respond to a disconnect. */
2548 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
2549 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
2551 case RDMA_TRANSPORT_IWARP
:
2552 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
2561 EXPORT_SYMBOL(rdma_disconnect
);
2563 static int cma_ib_mc_handler(int status
, struct ib_sa_multicast
*multicast
)
2565 struct rdma_id_private
*id_priv
;
2566 struct cma_multicast
*mc
= multicast
->context
;
2567 struct rdma_cm_event event
;
2570 id_priv
= mc
->id_priv
;
2571 if (cma_disable_remove(id_priv
, CMA_ADDR_BOUND
) &&
2572 cma_disable_remove(id_priv
, CMA_ADDR_RESOLVED
))
2575 mutex_lock(&id_priv
->qp_mutex
);
2576 if (!status
&& id_priv
->id
.qp
)
2577 status
= ib_attach_mcast(id_priv
->id
.qp
, &multicast
->rec
.mgid
,
2578 multicast
->rec
.mlid
);
2579 mutex_unlock(&id_priv
->qp_mutex
);
2581 memset(&event
, 0, sizeof event
);
2582 event
.status
= status
;
2583 event
.param
.ud
.private_data
= mc
->context
;
2585 event
.event
= RDMA_CM_EVENT_MULTICAST_JOIN
;
2586 ib_init_ah_from_mcmember(id_priv
->id
.device
,
2587 id_priv
->id
.port_num
, &multicast
->rec
,
2588 &event
.param
.ud
.ah_attr
);
2589 event
.param
.ud
.qp_num
= 0xFFFFFF;
2590 event
.param
.ud
.qkey
= be32_to_cpu(multicast
->rec
.qkey
);
2592 event
.event
= RDMA_CM_EVENT_MULTICAST_ERROR
;
2594 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2596 cma_exch(id_priv
, CMA_DESTROYING
);
2597 cma_enable_remove(id_priv
);
2598 rdma_destroy_id(&id_priv
->id
);
2602 cma_enable_remove(id_priv
);
2606 static void cma_set_mgid(struct rdma_id_private
*id_priv
,
2607 struct sockaddr
*addr
, union ib_gid
*mgid
)
2609 unsigned char mc_map
[MAX_ADDR_LEN
];
2610 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2611 struct sockaddr_in
*sin
= (struct sockaddr_in
*) addr
;
2612 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) addr
;
2614 if (cma_any_addr(addr
)) {
2615 memset(mgid
, 0, sizeof *mgid
);
2616 } else if ((addr
->sa_family
== AF_INET6
) &&
2617 ((be32_to_cpu(sin6
->sin6_addr
.s6_addr32
[0]) & 0xFF10A01B) ==
2619 /* IPv6 address is an SA assigned MGID. */
2620 memcpy(mgid
, &sin6
->sin6_addr
, sizeof *mgid
);
2622 ip_ib_mc_map(sin
->sin_addr
.s_addr
, dev_addr
->broadcast
, mc_map
);
2623 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2624 mc_map
[7] = 0x01; /* Use RDMA CM signature */
2625 *mgid
= *(union ib_gid
*) (mc_map
+ 4);
2629 static int cma_join_ib_multicast(struct rdma_id_private
*id_priv
,
2630 struct cma_multicast
*mc
)
2632 struct ib_sa_mcmember_rec rec
;
2633 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2634 ib_sa_comp_mask comp_mask
;
2637 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
2638 ret
= ib_sa_get_mcmember_rec(id_priv
->id
.device
, id_priv
->id
.port_num
,
2643 cma_set_mgid(id_priv
, &mc
->addr
, &rec
.mgid
);
2644 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2645 rec
.qkey
= cpu_to_be32(RDMA_UDP_QKEY
);
2646 ib_addr_get_sgid(dev_addr
, &rec
.port_gid
);
2647 rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(dev_addr
));
2650 comp_mask
= IB_SA_MCMEMBER_REC_MGID
| IB_SA_MCMEMBER_REC_PORT_GID
|
2651 IB_SA_MCMEMBER_REC_PKEY
| IB_SA_MCMEMBER_REC_JOIN_STATE
|
2652 IB_SA_MCMEMBER_REC_QKEY
| IB_SA_MCMEMBER_REC_SL
|
2653 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
2654 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
;
2656 mc
->multicast
.ib
= ib_sa_join_multicast(&sa_client
, id_priv
->id
.device
,
2657 id_priv
->id
.port_num
, &rec
,
2658 comp_mask
, GFP_KERNEL
,
2659 cma_ib_mc_handler
, mc
);
2660 if (IS_ERR(mc
->multicast
.ib
))
2661 return PTR_ERR(mc
->multicast
.ib
);
2666 int rdma_join_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
,
2669 struct rdma_id_private
*id_priv
;
2670 struct cma_multicast
*mc
;
2673 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2674 if (!cma_comp(id_priv
, CMA_ADDR_BOUND
) &&
2675 !cma_comp(id_priv
, CMA_ADDR_RESOLVED
))
2678 mc
= kmalloc(sizeof *mc
, GFP_KERNEL
);
2682 memcpy(&mc
->addr
, addr
, ip_addr_size(addr
));
2683 mc
->context
= context
;
2684 mc
->id_priv
= id_priv
;
2686 spin_lock(&id_priv
->lock
);
2687 list_add(&mc
->list
, &id_priv
->mc_list
);
2688 spin_unlock(&id_priv
->lock
);
2690 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2691 case RDMA_TRANSPORT_IB
:
2692 ret
= cma_join_ib_multicast(id_priv
, mc
);
2700 spin_lock_irq(&id_priv
->lock
);
2701 list_del(&mc
->list
);
2702 spin_unlock_irq(&id_priv
->lock
);
2707 EXPORT_SYMBOL(rdma_join_multicast
);
2709 void rdma_leave_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
2711 struct rdma_id_private
*id_priv
;
2712 struct cma_multicast
*mc
;
2714 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2715 spin_lock_irq(&id_priv
->lock
);
2716 list_for_each_entry(mc
, &id_priv
->mc_list
, list
) {
2717 if (!memcmp(&mc
->addr
, addr
, ip_addr_size(addr
))) {
2718 list_del(&mc
->list
);
2719 spin_unlock_irq(&id_priv
->lock
);
2722 ib_detach_mcast(id
->qp
,
2723 &mc
->multicast
.ib
->rec
.mgid
,
2724 mc
->multicast
.ib
->rec
.mlid
);
2725 ib_sa_free_multicast(mc
->multicast
.ib
);
2730 spin_unlock_irq(&id_priv
->lock
);
2732 EXPORT_SYMBOL(rdma_leave_multicast
);
2734 static void cma_add_one(struct ib_device
*device
)
2736 struct cma_device
*cma_dev
;
2737 struct rdma_id_private
*id_priv
;
2739 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
2743 cma_dev
->device
= device
;
2745 init_completion(&cma_dev
->comp
);
2746 atomic_set(&cma_dev
->refcount
, 1);
2747 INIT_LIST_HEAD(&cma_dev
->id_list
);
2748 ib_set_client_data(device
, &cma_client
, cma_dev
);
2751 list_add_tail(&cma_dev
->list
, &dev_list
);
2752 list_for_each_entry(id_priv
, &listen_any_list
, list
)
2753 cma_listen_on_dev(id_priv
, cma_dev
);
2754 mutex_unlock(&lock
);
2757 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
2759 struct rdma_cm_event event
;
2760 enum cma_state state
;
2762 /* Record that we want to remove the device */
2763 state
= cma_exch(id_priv
, CMA_DEVICE_REMOVAL
);
2764 if (state
== CMA_DESTROYING
)
2767 cma_cancel_operation(id_priv
, state
);
2768 wait_event(id_priv
->wait_remove
, !atomic_read(&id_priv
->dev_remove
));
2770 /* Check for destruction from another callback. */
2771 if (!cma_comp(id_priv
, CMA_DEVICE_REMOVAL
))
2774 memset(&event
, 0, sizeof event
);
2775 event
.event
= RDMA_CM_EVENT_DEVICE_REMOVAL
;
2776 return id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2779 static void cma_process_remove(struct cma_device
*cma_dev
)
2781 struct rdma_id_private
*id_priv
;
2785 while (!list_empty(&cma_dev
->id_list
)) {
2786 id_priv
= list_entry(cma_dev
->id_list
.next
,
2787 struct rdma_id_private
, list
);
2789 list_del(&id_priv
->listen_list
);
2790 list_del_init(&id_priv
->list
);
2791 atomic_inc(&id_priv
->refcount
);
2792 mutex_unlock(&lock
);
2794 ret
= id_priv
->internal_id
? 1 : cma_remove_id_dev(id_priv
);
2795 cma_deref_id(id_priv
);
2797 rdma_destroy_id(&id_priv
->id
);
2801 mutex_unlock(&lock
);
2803 cma_deref_dev(cma_dev
);
2804 wait_for_completion(&cma_dev
->comp
);
2807 static void cma_remove_one(struct ib_device
*device
)
2809 struct cma_device
*cma_dev
;
2811 cma_dev
= ib_get_client_data(device
, &cma_client
);
2816 list_del(&cma_dev
->list
);
2817 mutex_unlock(&lock
);
2819 cma_process_remove(cma_dev
);
2823 static int cma_init(void)
2825 int ret
, low
, high
, remaining
;
2827 get_random_bytes(&next_port
, sizeof next_port
);
2828 inet_get_local_port_range(&low
, &high
);
2829 remaining
= (high
- low
) + 1;
2830 next_port
= ((unsigned int) next_port
% remaining
) + low
;
2832 cma_wq
= create_singlethread_workqueue("rdma_cm");
2836 ib_sa_register_client(&sa_client
);
2837 rdma_addr_register_client(&addr_client
);
2839 ret
= ib_register_client(&cma_client
);
2845 rdma_addr_unregister_client(&addr_client
);
2846 ib_sa_unregister_client(&sa_client
);
2847 destroy_workqueue(cma_wq
);
2851 static void cma_cleanup(void)
2853 ib_unregister_client(&cma_client
);
2854 rdma_addr_unregister_client(&addr_client
);
2855 ib_sa_unregister_client(&sa_client
);
2856 destroy_workqueue(cma_wq
);
2857 idr_destroy(&sdp_ps
);
2858 idr_destroy(&tcp_ps
);
2859 idr_destroy(&udp_ps
);
2860 idr_destroy(&ipoib_ps
);
2863 module_init(cma_init
);
2864 module_exit(cma_cleanup
);