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>
47 #include <rdma/rdma_cm.h>
48 #include <rdma/rdma_cm_ib.h>
49 #include <rdma/ib_cache.h>
50 #include <rdma/ib_cm.h>
51 #include <rdma/ib_sa.h>
52 #include <rdma/iw_cm.h>
54 MODULE_AUTHOR("Sean Hefty");
55 MODULE_DESCRIPTION("Generic RDMA CM Agent");
56 MODULE_LICENSE("Dual BSD/GPL");
58 #define CMA_CM_RESPONSE_TIMEOUT 20
59 #define CMA_MAX_CM_RETRIES 15
60 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
62 static void cma_add_one(struct ib_device
*device
);
63 static void cma_remove_one(struct ib_device
*device
);
65 static struct ib_client cma_client
= {
68 .remove
= cma_remove_one
71 static struct ib_sa_client sa_client
;
72 static struct rdma_addr_client addr_client
;
73 static LIST_HEAD(dev_list
);
74 static LIST_HEAD(listen_any_list
);
75 static DEFINE_MUTEX(lock
);
76 static struct workqueue_struct
*cma_wq
;
77 static DEFINE_IDR(sdp_ps
);
78 static DEFINE_IDR(tcp_ps
);
79 static DEFINE_IDR(udp_ps
);
80 static DEFINE_IDR(ipoib_ps
);
84 struct list_head list
;
85 struct ib_device
*device
;
86 struct completion comp
;
88 struct list_head id_list
;
105 struct rdma_bind_list
{
107 struct hlist_head owners
;
112 * Device removal can occur at anytime, so we need extra handling to
113 * serialize notifying the user of device removal with other callbacks.
114 * We do this by disabling removal notification while a callback is in process,
115 * and reporting it after the callback completes.
117 struct rdma_id_private
{
118 struct rdma_cm_id id
;
120 struct rdma_bind_list
*bind_list
;
121 struct hlist_node node
;
122 struct list_head list
; /* listen_any_list or cma_device.list */
123 struct list_head listen_list
; /* per device listens */
124 struct cma_device
*cma_dev
;
125 struct list_head mc_list
;
128 enum cma_state state
;
130 struct mutex qp_mutex
;
132 struct completion comp
;
134 struct mutex handler_mutex
;
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_storage addr
;
163 struct work_struct work
;
164 struct rdma_id_private
*id
;
165 enum cma_state old_state
;
166 enum cma_state new_state
;
167 struct rdma_cm_event event
;
170 struct cma_ndev_work
{
171 struct work_struct work
;
172 struct rdma_id_private
*id
;
173 struct rdma_cm_event event
;
186 u8 ip_version
; /* IP version: 7:4 */
188 union cma_ip_addr src_addr
;
189 union cma_ip_addr dst_addr
;
194 u8 sdp_version
; /* Major version: 7:4 */
195 u8 ip_version
; /* IP version: 7:4 */
196 u8 sdp_specific1
[10];
198 __be16 sdp_specific2
;
199 union cma_ip_addr src_addr
;
200 union cma_ip_addr dst_addr
;
208 #define CMA_VERSION 0x00
209 #define SDP_MAJ_VERSION 0x2
211 static int cma_comp(struct rdma_id_private
*id_priv
, enum cma_state comp
)
216 spin_lock_irqsave(&id_priv
->lock
, flags
);
217 ret
= (id_priv
->state
== comp
);
218 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
222 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
223 enum cma_state comp
, enum cma_state exch
)
228 spin_lock_irqsave(&id_priv
->lock
, flags
);
229 if ((ret
= (id_priv
->state
== comp
)))
230 id_priv
->state
= exch
;
231 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
235 static enum cma_state
cma_exch(struct rdma_id_private
*id_priv
,
241 spin_lock_irqsave(&id_priv
->lock
, flags
);
242 old
= id_priv
->state
;
243 id_priv
->state
= exch
;
244 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
248 static inline u8
cma_get_ip_ver(struct cma_hdr
*hdr
)
250 return hdr
->ip_version
>> 4;
253 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
255 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
258 static inline u8
sdp_get_majv(u8 sdp_version
)
260 return sdp_version
>> 4;
263 static inline u8
sdp_get_ip_ver(struct sdp_hh
*hh
)
265 return hh
->ip_version
>> 4;
268 static inline void sdp_set_ip_ver(struct sdp_hh
*hh
, u8 ip_ver
)
270 hh
->ip_version
= (ip_ver
<< 4) | (hh
->ip_version
& 0xF);
273 static inline int cma_is_ud_ps(enum rdma_port_space ps
)
275 return (ps
== RDMA_PS_UDP
|| ps
== RDMA_PS_IPOIB
);
278 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
279 struct cma_device
*cma_dev
)
281 atomic_inc(&cma_dev
->refcount
);
282 id_priv
->cma_dev
= cma_dev
;
283 id_priv
->id
.device
= cma_dev
->device
;
284 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
287 static inline void cma_deref_dev(struct cma_device
*cma_dev
)
289 if (atomic_dec_and_test(&cma_dev
->refcount
))
290 complete(&cma_dev
->comp
);
293 static void cma_detach_from_dev(struct rdma_id_private
*id_priv
)
295 list_del(&id_priv
->list
);
296 cma_deref_dev(id_priv
->cma_dev
);
297 id_priv
->cma_dev
= NULL
;
300 static int cma_set_qkey(struct ib_device
*device
, u8 port_num
,
301 enum rdma_port_space ps
,
302 struct rdma_dev_addr
*dev_addr
, u32
*qkey
)
304 struct ib_sa_mcmember_rec rec
;
309 *qkey
= RDMA_UDP_QKEY
;
312 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
313 ret
= ib_sa_get_mcmember_rec(device
, port_num
, &rec
.mgid
, &rec
);
314 *qkey
= be32_to_cpu(rec
.qkey
);
322 static int cma_acquire_dev(struct rdma_id_private
*id_priv
)
324 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
325 struct cma_device
*cma_dev
;
329 switch (rdma_node_get_transport(dev_addr
->dev_type
)) {
330 case RDMA_TRANSPORT_IB
:
331 ib_addr_get_sgid(dev_addr
, &gid
);
333 case RDMA_TRANSPORT_IWARP
:
334 iw_addr_get_sgid(dev_addr
, &gid
);
340 list_for_each_entry(cma_dev
, &dev_list
, list
) {
341 ret
= ib_find_cached_gid(cma_dev
->device
, &gid
,
342 &id_priv
->id
.port_num
, NULL
);
344 ret
= cma_set_qkey(cma_dev
->device
,
345 id_priv
->id
.port_num
,
346 id_priv
->id
.ps
, dev_addr
,
349 cma_attach_to_dev(id_priv
, cma_dev
);
356 static void cma_deref_id(struct rdma_id_private
*id_priv
)
358 if (atomic_dec_and_test(&id_priv
->refcount
))
359 complete(&id_priv
->comp
);
362 static int cma_disable_callback(struct rdma_id_private
*id_priv
,
363 enum cma_state state
)
365 mutex_lock(&id_priv
->handler_mutex
);
366 if (id_priv
->state
!= state
) {
367 mutex_unlock(&id_priv
->handler_mutex
);
373 static int cma_has_cm_dev(struct rdma_id_private
*id_priv
)
375 return (id_priv
->id
.device
&& id_priv
->cm_id
.ib
);
378 struct rdma_cm_id
*rdma_create_id(rdma_cm_event_handler event_handler
,
379 void *context
, enum rdma_port_space ps
)
381 struct rdma_id_private
*id_priv
;
383 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
385 return ERR_PTR(-ENOMEM
);
387 id_priv
->state
= CMA_IDLE
;
388 id_priv
->id
.context
= context
;
389 id_priv
->id
.event_handler
= event_handler
;
391 spin_lock_init(&id_priv
->lock
);
392 mutex_init(&id_priv
->qp_mutex
);
393 init_completion(&id_priv
->comp
);
394 atomic_set(&id_priv
->refcount
, 1);
395 mutex_init(&id_priv
->handler_mutex
);
396 INIT_LIST_HEAD(&id_priv
->listen_list
);
397 INIT_LIST_HEAD(&id_priv
->mc_list
);
398 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
402 EXPORT_SYMBOL(rdma_create_id
);
404 static int cma_init_ud_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
406 struct ib_qp_attr qp_attr
;
407 int qp_attr_mask
, ret
;
409 qp_attr
.qp_state
= IB_QPS_INIT
;
410 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
414 ret
= ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
418 qp_attr
.qp_state
= IB_QPS_RTR
;
419 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
);
423 qp_attr
.qp_state
= IB_QPS_RTS
;
425 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
430 static int cma_init_conn_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
432 struct ib_qp_attr qp_attr
;
433 int qp_attr_mask
, ret
;
435 qp_attr
.qp_state
= IB_QPS_INIT
;
436 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
440 return ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
443 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
444 struct ib_qp_init_attr
*qp_init_attr
)
446 struct rdma_id_private
*id_priv
;
450 id_priv
= container_of(id
, struct rdma_id_private
, id
);
451 if (id
->device
!= pd
->device
)
454 qp
= ib_create_qp(pd
, qp_init_attr
);
458 if (cma_is_ud_ps(id_priv
->id
.ps
))
459 ret
= cma_init_ud_qp(id_priv
, qp
);
461 ret
= cma_init_conn_qp(id_priv
, qp
);
466 id_priv
->qp_num
= qp
->qp_num
;
467 id_priv
->srq
= (qp
->srq
!= NULL
);
473 EXPORT_SYMBOL(rdma_create_qp
);
475 void rdma_destroy_qp(struct rdma_cm_id
*id
)
477 struct rdma_id_private
*id_priv
;
479 id_priv
= container_of(id
, struct rdma_id_private
, id
);
480 mutex_lock(&id_priv
->qp_mutex
);
481 ib_destroy_qp(id_priv
->id
.qp
);
482 id_priv
->id
.qp
= NULL
;
483 mutex_unlock(&id_priv
->qp_mutex
);
485 EXPORT_SYMBOL(rdma_destroy_qp
);
487 static int cma_modify_qp_rtr(struct rdma_id_private
*id_priv
,
488 struct rdma_conn_param
*conn_param
)
490 struct ib_qp_attr qp_attr
;
491 int qp_attr_mask
, ret
;
493 mutex_lock(&id_priv
->qp_mutex
);
494 if (!id_priv
->id
.qp
) {
499 /* Need to update QP attributes from default values. */
500 qp_attr
.qp_state
= IB_QPS_INIT
;
501 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
505 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
509 qp_attr
.qp_state
= IB_QPS_RTR
;
510 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
515 qp_attr
.max_dest_rd_atomic
= conn_param
->responder_resources
;
516 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
518 mutex_unlock(&id_priv
->qp_mutex
);
522 static int cma_modify_qp_rts(struct rdma_id_private
*id_priv
,
523 struct rdma_conn_param
*conn_param
)
525 struct ib_qp_attr qp_attr
;
526 int qp_attr_mask
, ret
;
528 mutex_lock(&id_priv
->qp_mutex
);
529 if (!id_priv
->id
.qp
) {
534 qp_attr
.qp_state
= IB_QPS_RTS
;
535 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
540 qp_attr
.max_rd_atomic
= conn_param
->initiator_depth
;
541 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
543 mutex_unlock(&id_priv
->qp_mutex
);
547 static int cma_modify_qp_err(struct rdma_id_private
*id_priv
)
549 struct ib_qp_attr qp_attr
;
552 mutex_lock(&id_priv
->qp_mutex
);
553 if (!id_priv
->id
.qp
) {
558 qp_attr
.qp_state
= IB_QPS_ERR
;
559 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, IB_QP_STATE
);
561 mutex_unlock(&id_priv
->qp_mutex
);
565 static int cma_ib_init_qp_attr(struct rdma_id_private
*id_priv
,
566 struct ib_qp_attr
*qp_attr
, int *qp_attr_mask
)
568 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
571 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
572 ib_addr_get_pkey(dev_addr
),
573 &qp_attr
->pkey_index
);
577 qp_attr
->port_num
= id_priv
->id
.port_num
;
578 *qp_attr_mask
= IB_QP_STATE
| IB_QP_PKEY_INDEX
| IB_QP_PORT
;
580 if (cma_is_ud_ps(id_priv
->id
.ps
)) {
581 qp_attr
->qkey
= id_priv
->qkey
;
582 *qp_attr_mask
|= IB_QP_QKEY
;
584 qp_attr
->qp_access_flags
= 0;
585 *qp_attr_mask
|= IB_QP_ACCESS_FLAGS
;
590 int rdma_init_qp_attr(struct rdma_cm_id
*id
, struct ib_qp_attr
*qp_attr
,
593 struct rdma_id_private
*id_priv
;
596 id_priv
= container_of(id
, struct rdma_id_private
, id
);
597 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
598 case RDMA_TRANSPORT_IB
:
599 if (!id_priv
->cm_id
.ib
|| cma_is_ud_ps(id_priv
->id
.ps
))
600 ret
= cma_ib_init_qp_attr(id_priv
, qp_attr
, qp_attr_mask
);
602 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, qp_attr
,
604 if (qp_attr
->qp_state
== IB_QPS_RTR
)
605 qp_attr
->rq_psn
= id_priv
->seq_num
;
607 case RDMA_TRANSPORT_IWARP
:
608 if (!id_priv
->cm_id
.iw
) {
609 qp_attr
->qp_access_flags
= 0;
610 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
;
612 ret
= iw_cm_init_qp_attr(id_priv
->cm_id
.iw
, qp_attr
,
622 EXPORT_SYMBOL(rdma_init_qp_attr
);
624 static inline int cma_zero_addr(struct sockaddr
*addr
)
626 struct in6_addr
*ip6
;
628 if (addr
->sa_family
== AF_INET
)
629 return ipv4_is_zeronet(
630 ((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
);
632 ip6
= &((struct sockaddr_in6
*) addr
)->sin6_addr
;
633 return (ip6
->s6_addr32
[0] | ip6
->s6_addr32
[1] |
634 ip6
->s6_addr32
[2] | ip6
->s6_addr32
[3]) == 0;
638 static inline int cma_loopback_addr(struct sockaddr
*addr
)
640 if (addr
->sa_family
== AF_INET
)
641 return ipv4_is_loopback(
642 ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
644 return ipv6_addr_loopback(
645 &((struct sockaddr_in6
*) addr
)->sin6_addr
);
648 static inline int cma_any_addr(struct sockaddr
*addr
)
650 return cma_zero_addr(addr
) || cma_loopback_addr(addr
);
653 static inline __be16
cma_port(struct sockaddr
*addr
)
655 if (addr
->sa_family
== AF_INET
)
656 return ((struct sockaddr_in
*) addr
)->sin_port
;
658 return ((struct sockaddr_in6
*) addr
)->sin6_port
;
661 static inline int cma_any_port(struct sockaddr
*addr
)
663 return !cma_port(addr
);
666 static int cma_get_net_info(void *hdr
, enum rdma_port_space ps
,
667 u8
*ip_ver
, __be16
*port
,
668 union cma_ip_addr
**src
, union cma_ip_addr
**dst
)
672 if (sdp_get_majv(((struct sdp_hh
*) hdr
)->sdp_version
) !=
676 *ip_ver
= sdp_get_ip_ver(hdr
);
677 *port
= ((struct sdp_hh
*) hdr
)->port
;
678 *src
= &((struct sdp_hh
*) hdr
)->src_addr
;
679 *dst
= &((struct sdp_hh
*) hdr
)->dst_addr
;
682 if (((struct cma_hdr
*) hdr
)->cma_version
!= CMA_VERSION
)
685 *ip_ver
= cma_get_ip_ver(hdr
);
686 *port
= ((struct cma_hdr
*) hdr
)->port
;
687 *src
= &((struct cma_hdr
*) hdr
)->src_addr
;
688 *dst
= &((struct cma_hdr
*) hdr
)->dst_addr
;
692 if (*ip_ver
!= 4 && *ip_ver
!= 6)
697 static void cma_save_net_info(struct rdma_addr
*addr
,
698 struct rdma_addr
*listen_addr
,
699 u8 ip_ver
, __be16 port
,
700 union cma_ip_addr
*src
, union cma_ip_addr
*dst
)
702 struct sockaddr_in
*listen4
, *ip4
;
703 struct sockaddr_in6
*listen6
, *ip6
;
707 listen4
= (struct sockaddr_in
*) &listen_addr
->src_addr
;
708 ip4
= (struct sockaddr_in
*) &addr
->src_addr
;
709 ip4
->sin_family
= listen4
->sin_family
;
710 ip4
->sin_addr
.s_addr
= dst
->ip4
.addr
;
711 ip4
->sin_port
= listen4
->sin_port
;
713 ip4
= (struct sockaddr_in
*) &addr
->dst_addr
;
714 ip4
->sin_family
= listen4
->sin_family
;
715 ip4
->sin_addr
.s_addr
= src
->ip4
.addr
;
716 ip4
->sin_port
= port
;
719 listen6
= (struct sockaddr_in6
*) &listen_addr
->src_addr
;
720 ip6
= (struct sockaddr_in6
*) &addr
->src_addr
;
721 ip6
->sin6_family
= listen6
->sin6_family
;
722 ip6
->sin6_addr
= dst
->ip6
;
723 ip6
->sin6_port
= listen6
->sin6_port
;
725 ip6
= (struct sockaddr_in6
*) &addr
->dst_addr
;
726 ip6
->sin6_family
= listen6
->sin6_family
;
727 ip6
->sin6_addr
= src
->ip6
;
728 ip6
->sin6_port
= port
;
735 static inline int cma_user_data_offset(enum rdma_port_space ps
)
741 return sizeof(struct cma_hdr
);
745 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
747 switch (rdma_node_get_transport(id_priv
->id
.device
->node_type
)) {
748 case RDMA_TRANSPORT_IB
:
750 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
757 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
759 struct rdma_id_private
*dev_id_priv
;
762 * Remove from listen_any_list to prevent added devices from spawning
763 * additional listen requests.
766 list_del(&id_priv
->list
);
768 while (!list_empty(&id_priv
->listen_list
)) {
769 dev_id_priv
= list_entry(id_priv
->listen_list
.next
,
770 struct rdma_id_private
, listen_list
);
771 /* sync with device removal to avoid duplicate destruction */
772 list_del_init(&dev_id_priv
->list
);
773 list_del(&dev_id_priv
->listen_list
);
776 rdma_destroy_id(&dev_id_priv
->id
);
782 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
783 enum cma_state state
)
787 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
789 case CMA_ROUTE_QUERY
:
790 cma_cancel_route(id_priv
);
793 if (cma_any_addr((struct sockaddr
*) &id_priv
->id
.route
.addr
.src_addr
)
794 && !id_priv
->cma_dev
)
795 cma_cancel_listens(id_priv
);
802 static void cma_release_port(struct rdma_id_private
*id_priv
)
804 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
810 hlist_del(&id_priv
->node
);
811 if (hlist_empty(&bind_list
->owners
)) {
812 idr_remove(bind_list
->ps
, bind_list
->port
);
818 static void cma_leave_mc_groups(struct rdma_id_private
*id_priv
)
820 struct cma_multicast
*mc
;
822 while (!list_empty(&id_priv
->mc_list
)) {
823 mc
= container_of(id_priv
->mc_list
.next
,
824 struct cma_multicast
, list
);
826 ib_sa_free_multicast(mc
->multicast
.ib
);
831 void rdma_destroy_id(struct rdma_cm_id
*id
)
833 struct rdma_id_private
*id_priv
;
834 enum cma_state state
;
836 id_priv
= container_of(id
, struct rdma_id_private
, id
);
837 state
= cma_exch(id_priv
, CMA_DESTROYING
);
838 cma_cancel_operation(id_priv
, state
);
841 if (id_priv
->cma_dev
) {
843 switch (rdma_node_get_transport(id
->device
->node_type
)) {
844 case RDMA_TRANSPORT_IB
:
845 if (id_priv
->cm_id
.ib
&& !IS_ERR(id_priv
->cm_id
.ib
))
846 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
848 case RDMA_TRANSPORT_IWARP
:
849 if (id_priv
->cm_id
.iw
&& !IS_ERR(id_priv
->cm_id
.iw
))
850 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
855 cma_leave_mc_groups(id_priv
);
857 cma_detach_from_dev(id_priv
);
861 cma_release_port(id_priv
);
862 cma_deref_id(id_priv
);
863 wait_for_completion(&id_priv
->comp
);
865 if (id_priv
->internal_id
)
866 cma_deref_id(id_priv
->id
.context
);
868 kfree(id_priv
->id
.route
.path_rec
);
871 EXPORT_SYMBOL(rdma_destroy_id
);
873 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
877 ret
= cma_modify_qp_rtr(id_priv
, NULL
);
881 ret
= cma_modify_qp_rts(id_priv
, NULL
);
885 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
891 cma_modify_qp_err(id_priv
);
892 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
897 static int cma_verify_rep(struct rdma_id_private
*id_priv
, void *data
)
899 if (id_priv
->id
.ps
== RDMA_PS_SDP
&&
900 sdp_get_majv(((struct sdp_hah
*) data
)->sdp_version
) !=
907 static void cma_set_rep_event_data(struct rdma_cm_event
*event
,
908 struct ib_cm_rep_event_param
*rep_data
,
911 event
->param
.conn
.private_data
= private_data
;
912 event
->param
.conn
.private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
913 event
->param
.conn
.responder_resources
= rep_data
->responder_resources
;
914 event
->param
.conn
.initiator_depth
= rep_data
->initiator_depth
;
915 event
->param
.conn
.flow_control
= rep_data
->flow_control
;
916 event
->param
.conn
.rnr_retry_count
= rep_data
->rnr_retry_count
;
917 event
->param
.conn
.srq
= rep_data
->srq
;
918 event
->param
.conn
.qp_num
= rep_data
->remote_qpn
;
921 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
923 struct rdma_id_private
*id_priv
= cm_id
->context
;
924 struct rdma_cm_event event
;
927 if ((ib_event
->event
!= IB_CM_TIMEWAIT_EXIT
&&
928 cma_disable_callback(id_priv
, CMA_CONNECT
)) ||
929 (ib_event
->event
== IB_CM_TIMEWAIT_EXIT
&&
930 cma_disable_callback(id_priv
, CMA_DISCONNECT
)))
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 event
.event
= RDMA_CM_EVENT_TIMEWAIT_EXIT
;
968 case IB_CM_MRA_RECEIVED
:
971 case IB_CM_REJ_RECEIVED
:
972 cma_modify_qp_err(id_priv
);
973 event
.status
= ib_event
->param
.rej_rcvd
.reason
;
974 event
.event
= RDMA_CM_EVENT_REJECTED
;
975 event
.param
.conn
.private_data
= ib_event
->private_data
;
976 event
.param
.conn
.private_data_len
= IB_CM_REJ_PRIVATE_DATA_SIZE
;
979 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d\n",
984 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
986 /* Destroy the CM ID by returning a non-zero value. */
987 id_priv
->cm_id
.ib
= NULL
;
988 cma_exch(id_priv
, CMA_DESTROYING
);
989 mutex_unlock(&id_priv
->handler_mutex
);
990 rdma_destroy_id(&id_priv
->id
);
994 mutex_unlock(&id_priv
->handler_mutex
);
998 static struct rdma_id_private
*cma_new_conn_id(struct rdma_cm_id
*listen_id
,
999 struct ib_cm_event
*ib_event
)
1001 struct rdma_id_private
*id_priv
;
1002 struct rdma_cm_id
*id
;
1003 struct rdma_route
*rt
;
1004 union cma_ip_addr
*src
, *dst
;
1009 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
1010 &ip_ver
, &port
, &src
, &dst
))
1013 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
1018 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
1019 ip_ver
, port
, src
, dst
);
1022 rt
->num_paths
= ib_event
->param
.req_rcvd
.alternate_path
? 2 : 1;
1023 rt
->path_rec
= kmalloc(sizeof *rt
->path_rec
* rt
->num_paths
,
1028 rt
->path_rec
[0] = *ib_event
->param
.req_rcvd
.primary_path
;
1029 if (rt
->num_paths
== 2)
1030 rt
->path_rec
[1] = *ib_event
->param
.req_rcvd
.alternate_path
;
1032 ib_addr_set_dgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].dgid
);
1033 ret
= rdma_translate_ip((struct sockaddr
*) &id
->route
.addr
.src_addr
,
1034 &id
->route
.addr
.dev_addr
);
1038 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1039 id_priv
->state
= CMA_CONNECT
;
1043 rdma_destroy_id(id
);
1048 static struct rdma_id_private
*cma_new_udp_id(struct rdma_cm_id
*listen_id
,
1049 struct ib_cm_event
*ib_event
)
1051 struct rdma_id_private
*id_priv
;
1052 struct rdma_cm_id
*id
;
1053 union cma_ip_addr
*src
, *dst
;
1058 id
= rdma_create_id(listen_id
->event_handler
, listen_id
->context
,
1064 if (cma_get_net_info(ib_event
->private_data
, listen_id
->ps
,
1065 &ip_ver
, &port
, &src
, &dst
))
1068 cma_save_net_info(&id
->route
.addr
, &listen_id
->route
.addr
,
1069 ip_ver
, port
, src
, dst
);
1071 ret
= rdma_translate_ip((struct sockaddr
*) &id
->route
.addr
.src_addr
,
1072 &id
->route
.addr
.dev_addr
);
1076 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1077 id_priv
->state
= CMA_CONNECT
;
1080 rdma_destroy_id(id
);
1084 static void cma_set_req_event_data(struct rdma_cm_event
*event
,
1085 struct ib_cm_req_event_param
*req_data
,
1086 void *private_data
, int offset
)
1088 event
->param
.conn
.private_data
= private_data
+ offset
;
1089 event
->param
.conn
.private_data_len
= IB_CM_REQ_PRIVATE_DATA_SIZE
- offset
;
1090 event
->param
.conn
.responder_resources
= req_data
->responder_resources
;
1091 event
->param
.conn
.initiator_depth
= req_data
->initiator_depth
;
1092 event
->param
.conn
.flow_control
= req_data
->flow_control
;
1093 event
->param
.conn
.retry_count
= req_data
->retry_count
;
1094 event
->param
.conn
.rnr_retry_count
= req_data
->rnr_retry_count
;
1095 event
->param
.conn
.srq
= req_data
->srq
;
1096 event
->param
.conn
.qp_num
= req_data
->remote_qpn
;
1099 static int cma_req_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
1101 struct rdma_id_private
*listen_id
, *conn_id
;
1102 struct rdma_cm_event event
;
1105 listen_id
= cm_id
->context
;
1106 if (cma_disable_callback(listen_id
, CMA_LISTEN
))
1107 return -ECONNABORTED
;
1109 memset(&event
, 0, sizeof event
);
1110 offset
= cma_user_data_offset(listen_id
->id
.ps
);
1111 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1112 if (cma_is_ud_ps(listen_id
->id
.ps
)) {
1113 conn_id
= cma_new_udp_id(&listen_id
->id
, ib_event
);
1114 event
.param
.ud
.private_data
= ib_event
->private_data
+ offset
;
1115 event
.param
.ud
.private_data_len
=
1116 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
- offset
;
1118 conn_id
= cma_new_conn_id(&listen_id
->id
, ib_event
);
1119 cma_set_req_event_data(&event
, &ib_event
->param
.req_rcvd
,
1120 ib_event
->private_data
, offset
);
1127 mutex_lock_nested(&conn_id
->handler_mutex
, SINGLE_DEPTH_NESTING
);
1129 ret
= cma_acquire_dev(conn_id
);
1130 mutex_unlock(&lock
);
1132 goto release_conn_id
;
1134 conn_id
->cm_id
.ib
= cm_id
;
1135 cm_id
->context
= conn_id
;
1136 cm_id
->cm_handler
= cma_ib_handler
;
1138 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1141 * Acquire mutex to prevent user executing rdma_destroy_id()
1142 * while we're accessing the cm_id.
1145 if (cma_comp(conn_id
, CMA_CONNECT
) &&
1146 !cma_is_ud_ps(conn_id
->id
.ps
))
1147 ib_send_cm_mra(cm_id
, CMA_CM_MRA_SETTING
, NULL
, 0);
1148 mutex_unlock(&lock
);
1149 mutex_unlock(&conn_id
->handler_mutex
);
1153 /* Destroy the CM ID by returning a non-zero value. */
1154 conn_id
->cm_id
.ib
= NULL
;
1157 cma_exch(conn_id
, CMA_DESTROYING
);
1158 mutex_unlock(&conn_id
->handler_mutex
);
1159 rdma_destroy_id(&conn_id
->id
);
1162 mutex_unlock(&listen_id
->handler_mutex
);
1166 static __be64
cma_get_service_id(enum rdma_port_space ps
, struct sockaddr
*addr
)
1168 return cpu_to_be64(((u64
)ps
<< 16) + be16_to_cpu(cma_port(addr
)));
1171 static void cma_set_compare_data(enum rdma_port_space ps
, struct sockaddr
*addr
,
1172 struct ib_cm_compare_data
*compare
)
1174 struct cma_hdr
*cma_data
, *cma_mask
;
1175 struct sdp_hh
*sdp_data
, *sdp_mask
;
1177 struct in6_addr ip6_addr
;
1179 memset(compare
, 0, sizeof *compare
);
1180 cma_data
= (void *) compare
->data
;
1181 cma_mask
= (void *) compare
->mask
;
1182 sdp_data
= (void *) compare
->data
;
1183 sdp_mask
= (void *) compare
->mask
;
1185 switch (addr
->sa_family
) {
1187 ip4_addr
= ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
;
1188 if (ps
== RDMA_PS_SDP
) {
1189 sdp_set_ip_ver(sdp_data
, 4);
1190 sdp_set_ip_ver(sdp_mask
, 0xF);
1191 sdp_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1192 sdp_mask
->dst_addr
.ip4
.addr
= htonl(~0);
1194 cma_set_ip_ver(cma_data
, 4);
1195 cma_set_ip_ver(cma_mask
, 0xF);
1196 cma_data
->dst_addr
.ip4
.addr
= ip4_addr
;
1197 cma_mask
->dst_addr
.ip4
.addr
= htonl(~0);
1201 ip6_addr
= ((struct sockaddr_in6
*) addr
)->sin6_addr
;
1202 if (ps
== RDMA_PS_SDP
) {
1203 sdp_set_ip_ver(sdp_data
, 6);
1204 sdp_set_ip_ver(sdp_mask
, 0xF);
1205 sdp_data
->dst_addr
.ip6
= ip6_addr
;
1206 memset(&sdp_mask
->dst_addr
.ip6
, 0xFF,
1207 sizeof sdp_mask
->dst_addr
.ip6
);
1209 cma_set_ip_ver(cma_data
, 6);
1210 cma_set_ip_ver(cma_mask
, 0xF);
1211 cma_data
->dst_addr
.ip6
= ip6_addr
;
1212 memset(&cma_mask
->dst_addr
.ip6
, 0xFF,
1213 sizeof cma_mask
->dst_addr
.ip6
);
1221 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1223 struct rdma_id_private
*id_priv
= iw_id
->context
;
1224 struct rdma_cm_event event
;
1225 struct sockaddr_in
*sin
;
1228 if (cma_disable_callback(id_priv
, CMA_CONNECT
))
1231 memset(&event
, 0, sizeof event
);
1232 switch (iw_event
->event
) {
1233 case IW_CM_EVENT_CLOSE
:
1234 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
1236 case IW_CM_EVENT_CONNECT_REPLY
:
1237 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1238 *sin
= iw_event
->local_addr
;
1239 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
1240 *sin
= iw_event
->remote_addr
;
1241 switch (iw_event
->status
) {
1243 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1247 event
.event
= RDMA_CM_EVENT_REJECTED
;
1250 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1253 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
1257 case IW_CM_EVENT_ESTABLISHED
:
1258 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1264 event
.status
= iw_event
->status
;
1265 event
.param
.conn
.private_data
= iw_event
->private_data
;
1266 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1267 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
1269 /* Destroy the CM ID by returning a non-zero value. */
1270 id_priv
->cm_id
.iw
= NULL
;
1271 cma_exch(id_priv
, CMA_DESTROYING
);
1272 mutex_unlock(&id_priv
->handler_mutex
);
1273 rdma_destroy_id(&id_priv
->id
);
1277 mutex_unlock(&id_priv
->handler_mutex
);
1281 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
1282 struct iw_cm_event
*iw_event
)
1284 struct rdma_cm_id
*new_cm_id
;
1285 struct rdma_id_private
*listen_id
, *conn_id
;
1286 struct sockaddr_in
*sin
;
1287 struct net_device
*dev
= NULL
;
1288 struct rdma_cm_event event
;
1290 struct ib_device_attr attr
;
1292 listen_id
= cm_id
->context
;
1293 if (cma_disable_callback(listen_id
, CMA_LISTEN
))
1294 return -ECONNABORTED
;
1296 /* Create a new RDMA id for the new IW CM ID */
1297 new_cm_id
= rdma_create_id(listen_id
->id
.event_handler
,
1298 listen_id
->id
.context
,
1300 if (IS_ERR(new_cm_id
)) {
1304 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
1305 mutex_lock_nested(&conn_id
->handler_mutex
, SINGLE_DEPTH_NESTING
);
1306 conn_id
->state
= CMA_CONNECT
;
1308 dev
= ip_dev_find(&init_net
, iw_event
->local_addr
.sin_addr
.s_addr
);
1310 ret
= -EADDRNOTAVAIL
;
1311 mutex_unlock(&conn_id
->handler_mutex
);
1312 rdma_destroy_id(new_cm_id
);
1315 ret
= rdma_copy_addr(&conn_id
->id
.route
.addr
.dev_addr
, dev
, NULL
);
1317 mutex_unlock(&conn_id
->handler_mutex
);
1318 rdma_destroy_id(new_cm_id
);
1323 ret
= cma_acquire_dev(conn_id
);
1324 mutex_unlock(&lock
);
1326 mutex_unlock(&conn_id
->handler_mutex
);
1327 rdma_destroy_id(new_cm_id
);
1331 conn_id
->cm_id
.iw
= cm_id
;
1332 cm_id
->context
= conn_id
;
1333 cm_id
->cm_handler
= cma_iw_handler
;
1335 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.src_addr
;
1336 *sin
= iw_event
->local_addr
;
1337 sin
= (struct sockaddr_in
*) &new_cm_id
->route
.addr
.dst_addr
;
1338 *sin
= iw_event
->remote_addr
;
1340 ret
= ib_query_device(conn_id
->id
.device
, &attr
);
1342 mutex_unlock(&conn_id
->handler_mutex
);
1343 rdma_destroy_id(new_cm_id
);
1347 memset(&event
, 0, sizeof event
);
1348 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1349 event
.param
.conn
.private_data
= iw_event
->private_data
;
1350 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
1351 event
.param
.conn
.initiator_depth
= attr
.max_qp_init_rd_atom
;
1352 event
.param
.conn
.responder_resources
= attr
.max_qp_rd_atom
;
1353 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1355 /* User wants to destroy the CM ID */
1356 conn_id
->cm_id
.iw
= NULL
;
1357 cma_exch(conn_id
, CMA_DESTROYING
);
1358 mutex_unlock(&conn_id
->handler_mutex
);
1359 rdma_destroy_id(&conn_id
->id
);
1363 mutex_unlock(&conn_id
->handler_mutex
);
1368 mutex_unlock(&listen_id
->handler_mutex
);
1372 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
1374 struct ib_cm_compare_data compare_data
;
1375 struct sockaddr
*addr
;
1379 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_req_handler
,
1381 if (IS_ERR(id_priv
->cm_id
.ib
))
1382 return PTR_ERR(id_priv
->cm_id
.ib
);
1384 addr
= (struct sockaddr
*) &id_priv
->id
.route
.addr
.src_addr
;
1385 svc_id
= cma_get_service_id(id_priv
->id
.ps
, addr
);
1386 if (cma_any_addr(addr
))
1387 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, NULL
);
1389 cma_set_compare_data(id_priv
->id
.ps
, addr
, &compare_data
);
1390 ret
= ib_cm_listen(id_priv
->cm_id
.ib
, svc_id
, 0, &compare_data
);
1394 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1395 id_priv
->cm_id
.ib
= NULL
;
1401 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
1404 struct sockaddr_in
*sin
;
1406 id_priv
->cm_id
.iw
= iw_create_cm_id(id_priv
->id
.device
,
1407 iw_conn_req_handler
,
1409 if (IS_ERR(id_priv
->cm_id
.iw
))
1410 return PTR_ERR(id_priv
->cm_id
.iw
);
1412 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1413 id_priv
->cm_id
.iw
->local_addr
= *sin
;
1415 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
1418 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1419 id_priv
->cm_id
.iw
= NULL
;
1425 static int cma_listen_handler(struct rdma_cm_id
*id
,
1426 struct rdma_cm_event
*event
)
1428 struct rdma_id_private
*id_priv
= id
->context
;
1430 id
->context
= id_priv
->id
.context
;
1431 id
->event_handler
= id_priv
->id
.event_handler
;
1432 return id_priv
->id
.event_handler(id
, event
);
1435 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
1436 struct cma_device
*cma_dev
)
1438 struct rdma_id_private
*dev_id_priv
;
1439 struct rdma_cm_id
*id
;
1442 id
= rdma_create_id(cma_listen_handler
, id_priv
, id_priv
->id
.ps
);
1446 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
1448 dev_id_priv
->state
= CMA_ADDR_BOUND
;
1449 memcpy(&id
->route
.addr
.src_addr
, &id_priv
->id
.route
.addr
.src_addr
,
1450 ip_addr_size((struct sockaddr
*) &id_priv
->id
.route
.addr
.src_addr
));
1452 cma_attach_to_dev(dev_id_priv
, cma_dev
);
1453 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
1454 atomic_inc(&id_priv
->refcount
);
1455 dev_id_priv
->internal_id
= 1;
1457 ret
= rdma_listen(id
, id_priv
->backlog
);
1459 printk(KERN_WARNING
"RDMA CMA: cma_listen_on_dev, error %d, "
1460 "listening on device %s\n", ret
, cma_dev
->device
->name
);
1463 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
1465 struct cma_device
*cma_dev
;
1468 list_add_tail(&id_priv
->list
, &listen_any_list
);
1469 list_for_each_entry(cma_dev
, &dev_list
, list
)
1470 cma_listen_on_dev(id_priv
, cma_dev
);
1471 mutex_unlock(&lock
);
1474 static int cma_bind_any(struct rdma_cm_id
*id
, sa_family_t af
)
1476 struct sockaddr_storage addr_in
;
1478 memset(&addr_in
, 0, sizeof addr_in
);
1479 addr_in
.ss_family
= af
;
1480 return rdma_bind_addr(id
, (struct sockaddr
*) &addr_in
);
1483 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
1485 struct rdma_id_private
*id_priv
;
1488 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1489 if (id_priv
->state
== CMA_IDLE
) {
1490 ret
= cma_bind_any(id
, AF_INET
);
1495 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_LISTEN
))
1498 id_priv
->backlog
= backlog
;
1500 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1501 case RDMA_TRANSPORT_IB
:
1502 ret
= cma_ib_listen(id_priv
);
1506 case RDMA_TRANSPORT_IWARP
:
1507 ret
= cma_iw_listen(id_priv
, backlog
);
1516 cma_listen_on_all(id_priv
);
1520 id_priv
->backlog
= 0;
1521 cma_comp_exch(id_priv
, CMA_LISTEN
, CMA_ADDR_BOUND
);
1524 EXPORT_SYMBOL(rdma_listen
);
1526 void rdma_set_service_type(struct rdma_cm_id
*id
, int tos
)
1528 struct rdma_id_private
*id_priv
;
1530 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1531 id_priv
->tos
= (u8
) tos
;
1533 EXPORT_SYMBOL(rdma_set_service_type
);
1535 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
1538 struct cma_work
*work
= context
;
1539 struct rdma_route
*route
;
1541 route
= &work
->id
->id
.route
;
1544 route
->num_paths
= 1;
1545 *route
->path_rec
= *path_rec
;
1547 work
->old_state
= CMA_ROUTE_QUERY
;
1548 work
->new_state
= CMA_ADDR_RESOLVED
;
1549 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
1550 work
->event
.status
= status
;
1553 queue_work(cma_wq
, &work
->work
);
1556 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
1557 struct cma_work
*work
)
1559 struct rdma_addr
*addr
= &id_priv
->id
.route
.addr
;
1560 struct ib_sa_path_rec path_rec
;
1561 ib_sa_comp_mask comp_mask
;
1562 struct sockaddr_in6
*sin6
;
1564 memset(&path_rec
, 0, sizeof path_rec
);
1565 ib_addr_get_sgid(&addr
->dev_addr
, &path_rec
.sgid
);
1566 ib_addr_get_dgid(&addr
->dev_addr
, &path_rec
.dgid
);
1567 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(&addr
->dev_addr
));
1568 path_rec
.numb_path
= 1;
1569 path_rec
.reversible
= 1;
1570 path_rec
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
1571 (struct sockaddr
*) &addr
->dst_addr
);
1573 comp_mask
= IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
1574 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
|
1575 IB_SA_PATH_REC_REVERSIBLE
| IB_SA_PATH_REC_SERVICE_ID
;
1577 if (addr
->src_addr
.ss_family
== AF_INET
) {
1578 path_rec
.qos_class
= cpu_to_be16((u16
) id_priv
->tos
);
1579 comp_mask
|= IB_SA_PATH_REC_QOS_CLASS
;
1581 sin6
= (struct sockaddr_in6
*) &addr
->src_addr
;
1582 path_rec
.traffic_class
= (u8
) (be32_to_cpu(sin6
->sin6_flowinfo
) >> 20);
1583 comp_mask
|= IB_SA_PATH_REC_TRAFFIC_CLASS
;
1586 id_priv
->query_id
= ib_sa_path_rec_get(&sa_client
, id_priv
->id
.device
,
1587 id_priv
->id
.port_num
, &path_rec
,
1588 comp_mask
, timeout_ms
,
1589 GFP_KERNEL
, cma_query_handler
,
1590 work
, &id_priv
->query
);
1592 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
1595 static void cma_work_handler(struct work_struct
*_work
)
1597 struct cma_work
*work
= container_of(_work
, struct cma_work
, work
);
1598 struct rdma_id_private
*id_priv
= work
->id
;
1601 mutex_lock(&id_priv
->handler_mutex
);
1602 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
1605 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
1606 cma_exch(id_priv
, CMA_DESTROYING
);
1610 mutex_unlock(&id_priv
->handler_mutex
);
1611 cma_deref_id(id_priv
);
1613 rdma_destroy_id(&id_priv
->id
);
1617 static void cma_ndev_work_handler(struct work_struct
*_work
)
1619 struct cma_ndev_work
*work
= container_of(_work
, struct cma_ndev_work
, work
);
1620 struct rdma_id_private
*id_priv
= work
->id
;
1623 mutex_lock(&id_priv
->handler_mutex
);
1624 if (id_priv
->state
== CMA_DESTROYING
||
1625 id_priv
->state
== CMA_DEVICE_REMOVAL
)
1628 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
1629 cma_exch(id_priv
, CMA_DESTROYING
);
1634 mutex_unlock(&id_priv
->handler_mutex
);
1635 cma_deref_id(id_priv
);
1637 rdma_destroy_id(&id_priv
->id
);
1641 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1643 struct rdma_route
*route
= &id_priv
->id
.route
;
1644 struct cma_work
*work
;
1647 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1652 INIT_WORK(&work
->work
, cma_work_handler
);
1653 work
->old_state
= CMA_ROUTE_QUERY
;
1654 work
->new_state
= CMA_ROUTE_RESOLVED
;
1655 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1657 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
1658 if (!route
->path_rec
) {
1663 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
1669 kfree(route
->path_rec
);
1670 route
->path_rec
= NULL
;
1676 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
1677 struct ib_sa_path_rec
*path_rec
, int num_paths
)
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_RESOLVED
))
1686 id
->route
.path_rec
= kmalloc(sizeof *path_rec
* num_paths
, GFP_KERNEL
);
1687 if (!id
->route
.path_rec
) {
1692 memcpy(id
->route
.path_rec
, path_rec
, sizeof *path_rec
* num_paths
);
1695 cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_ADDR_RESOLVED
);
1698 EXPORT_SYMBOL(rdma_set_ib_paths
);
1700 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
1702 struct cma_work
*work
;
1704 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1709 INIT_WORK(&work
->work
, cma_work_handler
);
1710 work
->old_state
= CMA_ROUTE_QUERY
;
1711 work
->new_state
= CMA_ROUTE_RESOLVED
;
1712 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
1713 queue_work(cma_wq
, &work
->work
);
1717 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
1719 struct rdma_id_private
*id_priv
;
1722 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1723 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ROUTE_QUERY
))
1726 atomic_inc(&id_priv
->refcount
);
1727 switch (rdma_node_get_transport(id
->device
->node_type
)) {
1728 case RDMA_TRANSPORT_IB
:
1729 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
1731 case RDMA_TRANSPORT_IWARP
:
1732 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
1743 cma_comp_exch(id_priv
, CMA_ROUTE_QUERY
, CMA_ADDR_RESOLVED
);
1744 cma_deref_id(id_priv
);
1747 EXPORT_SYMBOL(rdma_resolve_route
);
1749 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
1751 struct cma_device
*cma_dev
;
1752 struct ib_port_attr port_attr
;
1759 if (list_empty(&dev_list
)) {
1763 list_for_each_entry(cma_dev
, &dev_list
, list
)
1764 for (p
= 1; p
<= cma_dev
->device
->phys_port_cnt
; ++p
)
1765 if (!ib_query_port(cma_dev
->device
, p
, &port_attr
) &&
1766 port_attr
.state
== IB_PORT_ACTIVE
)
1770 cma_dev
= list_entry(dev_list
.next
, struct cma_device
, list
);
1773 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
);
1777 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
1781 ib_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1782 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
1783 id_priv
->id
.port_num
= p
;
1784 cma_attach_to_dev(id_priv
, cma_dev
);
1786 mutex_unlock(&lock
);
1790 static void addr_handler(int status
, struct sockaddr
*src_addr
,
1791 struct rdma_dev_addr
*dev_addr
, void *context
)
1793 struct rdma_id_private
*id_priv
= context
;
1794 struct rdma_cm_event event
;
1796 memset(&event
, 0, sizeof event
);
1797 mutex_lock(&id_priv
->handler_mutex
);
1800 * Grab mutex to block rdma_destroy_id() from removing the device while
1801 * we're trying to acquire it.
1804 if (!cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_RESOLVED
)) {
1805 mutex_unlock(&lock
);
1809 if (!status
&& !id_priv
->cma_dev
)
1810 status
= cma_acquire_dev(id_priv
);
1811 mutex_unlock(&lock
);
1814 if (!cma_comp_exch(id_priv
, CMA_ADDR_RESOLVED
, CMA_ADDR_BOUND
))
1816 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
1817 event
.status
= status
;
1819 memcpy(&id_priv
->id
.route
.addr
.src_addr
, src_addr
,
1820 ip_addr_size(src_addr
));
1821 event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1824 if (id_priv
->id
.event_handler(&id_priv
->id
, &event
)) {
1825 cma_exch(id_priv
, CMA_DESTROYING
);
1826 mutex_unlock(&id_priv
->handler_mutex
);
1827 cma_deref_id(id_priv
);
1828 rdma_destroy_id(&id_priv
->id
);
1832 mutex_unlock(&id_priv
->handler_mutex
);
1833 cma_deref_id(id_priv
);
1836 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
1838 struct cma_work
*work
;
1839 struct sockaddr_in
*src_in
, *dst_in
;
1843 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
1847 if (!id_priv
->cma_dev
) {
1848 ret
= cma_bind_loopback(id_priv
);
1853 ib_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1854 ib_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
1856 if (cma_zero_addr((struct sockaddr
*) &id_priv
->id
.route
.addr
.src_addr
)) {
1857 src_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.src_addr
;
1858 dst_in
= (struct sockaddr_in
*)&id_priv
->id
.route
.addr
.dst_addr
;
1859 src_in
->sin_family
= dst_in
->sin_family
;
1860 src_in
->sin_addr
.s_addr
= dst_in
->sin_addr
.s_addr
;
1864 INIT_WORK(&work
->work
, cma_work_handler
);
1865 work
->old_state
= CMA_ADDR_QUERY
;
1866 work
->new_state
= CMA_ADDR_RESOLVED
;
1867 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
1868 queue_work(cma_wq
, &work
->work
);
1875 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1876 struct sockaddr
*dst_addr
)
1878 if (src_addr
&& src_addr
->sa_family
)
1879 return rdma_bind_addr(id
, src_addr
);
1881 return cma_bind_any(id
, dst_addr
->sa_family
);
1884 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
1885 struct sockaddr
*dst_addr
, int timeout_ms
)
1887 struct rdma_id_private
*id_priv
;
1890 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1891 if (id_priv
->state
== CMA_IDLE
) {
1892 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
1897 if (!cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_ADDR_QUERY
))
1900 atomic_inc(&id_priv
->refcount
);
1901 memcpy(&id
->route
.addr
.dst_addr
, dst_addr
, ip_addr_size(dst_addr
));
1902 if (cma_any_addr(dst_addr
))
1903 ret
= cma_resolve_loopback(id_priv
);
1905 ret
= rdma_resolve_ip(&addr_client
, (struct sockaddr
*) &id
->route
.addr
.src_addr
,
1906 dst_addr
, &id
->route
.addr
.dev_addr
,
1907 timeout_ms
, addr_handler
, id_priv
);
1913 cma_comp_exch(id_priv
, CMA_ADDR_QUERY
, CMA_ADDR_BOUND
);
1914 cma_deref_id(id_priv
);
1917 EXPORT_SYMBOL(rdma_resolve_addr
);
1919 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
1920 struct rdma_id_private
*id_priv
)
1922 struct sockaddr_in
*sin
;
1924 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
1925 sin
->sin_port
= htons(bind_list
->port
);
1926 id_priv
->bind_list
= bind_list
;
1927 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
1930 static int cma_alloc_port(struct idr
*ps
, struct rdma_id_private
*id_priv
,
1931 unsigned short snum
)
1933 struct rdma_bind_list
*bind_list
;
1936 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1941 ret
= idr_get_new_above(ps
, bind_list
, snum
, &port
);
1942 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1948 ret
= -EADDRNOTAVAIL
;
1953 bind_list
->port
= (unsigned short) port
;
1954 cma_bind_port(bind_list
, id_priv
);
1957 idr_remove(ps
, port
);
1963 static int cma_alloc_any_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
1965 struct rdma_bind_list
*bind_list
;
1966 int port
, ret
, low
, high
;
1968 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
1973 /* FIXME: add proper port randomization per like inet_csk_get_port */
1975 ret
= idr_get_new_above(ps
, bind_list
, next_port
, &port
);
1976 } while ((ret
== -EAGAIN
) && idr_pre_get(ps
, GFP_KERNEL
));
1981 inet_get_local_port_range(&low
, &high
);
1983 if (next_port
!= low
) {
1984 idr_remove(ps
, port
);
1988 ret
= -EADDRNOTAVAIL
;
1995 next_port
= port
+ 1;
1998 bind_list
->port
= (unsigned short) port
;
1999 cma_bind_port(bind_list
, id_priv
);
2002 idr_remove(ps
, port
);
2008 static int cma_use_port(struct idr
*ps
, struct rdma_id_private
*id_priv
)
2010 struct rdma_id_private
*cur_id
;
2011 struct sockaddr_in
*sin
, *cur_sin
;
2012 struct rdma_bind_list
*bind_list
;
2013 struct hlist_node
*node
;
2014 unsigned short snum
;
2016 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
2017 snum
= ntohs(sin
->sin_port
);
2018 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
2021 bind_list
= idr_find(ps
, snum
);
2023 return cma_alloc_port(ps
, id_priv
, snum
);
2026 * We don't support binding to any address if anyone is bound to
2027 * a specific address on the same port.
2029 if (cma_any_addr((struct sockaddr
*) &id_priv
->id
.route
.addr
.src_addr
))
2030 return -EADDRNOTAVAIL
;
2032 hlist_for_each_entry(cur_id
, node
, &bind_list
->owners
, node
) {
2033 if (cma_any_addr((struct sockaddr
*) &cur_id
->id
.route
.addr
.src_addr
))
2034 return -EADDRNOTAVAIL
;
2036 cur_sin
= (struct sockaddr_in
*) &cur_id
->id
.route
.addr
.src_addr
;
2037 if (sin
->sin_addr
.s_addr
== cur_sin
->sin_addr
.s_addr
)
2041 cma_bind_port(bind_list
, id_priv
);
2045 static int cma_get_port(struct rdma_id_private
*id_priv
)
2050 switch (id_priv
->id
.ps
) {
2064 return -EPROTONOSUPPORT
;
2068 if (cma_any_port((struct sockaddr
*) &id_priv
->id
.route
.addr
.src_addr
))
2069 ret
= cma_alloc_any_port(ps
, id_priv
);
2071 ret
= cma_use_port(ps
, id_priv
);
2072 mutex_unlock(&lock
);
2077 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
2079 struct rdma_id_private
*id_priv
;
2082 if (addr
->sa_family
!= AF_INET
&& addr
->sa_family
!= AF_INET6
)
2083 return -EAFNOSUPPORT
;
2085 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2086 if (!cma_comp_exch(id_priv
, CMA_IDLE
, CMA_ADDR_BOUND
))
2089 if (!cma_any_addr(addr
)) {
2090 ret
= rdma_translate_ip(addr
, &id
->route
.addr
.dev_addr
);
2095 ret
= cma_acquire_dev(id_priv
);
2096 mutex_unlock(&lock
);
2101 memcpy(&id
->route
.addr
.src_addr
, addr
, ip_addr_size(addr
));
2102 ret
= cma_get_port(id_priv
);
2108 if (!cma_any_addr(addr
)) {
2110 cma_detach_from_dev(id_priv
);
2111 mutex_unlock(&lock
);
2114 cma_comp_exch(id_priv
, CMA_ADDR_BOUND
, CMA_IDLE
);
2117 EXPORT_SYMBOL(rdma_bind_addr
);
2119 static int cma_format_hdr(void *hdr
, enum rdma_port_space ps
,
2120 struct rdma_route
*route
)
2122 struct cma_hdr
*cma_hdr
;
2123 struct sdp_hh
*sdp_hdr
;
2125 if (route
->addr
.src_addr
.ss_family
== AF_INET
) {
2126 struct sockaddr_in
*src4
, *dst4
;
2128 src4
= (struct sockaddr_in
*) &route
->addr
.src_addr
;
2129 dst4
= (struct sockaddr_in
*) &route
->addr
.dst_addr
;
2134 if (sdp_get_majv(sdp_hdr
->sdp_version
) != SDP_MAJ_VERSION
)
2136 sdp_set_ip_ver(sdp_hdr
, 4);
2137 sdp_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2138 sdp_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2139 sdp_hdr
->port
= src4
->sin_port
;
2143 cma_hdr
->cma_version
= CMA_VERSION
;
2144 cma_set_ip_ver(cma_hdr
, 4);
2145 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
2146 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
2147 cma_hdr
->port
= src4
->sin_port
;
2151 struct sockaddr_in6
*src6
, *dst6
;
2153 src6
= (struct sockaddr_in6
*) &route
->addr
.src_addr
;
2154 dst6
= (struct sockaddr_in6
*) &route
->addr
.dst_addr
;
2159 if (sdp_get_majv(sdp_hdr
->sdp_version
) != SDP_MAJ_VERSION
)
2161 sdp_set_ip_ver(sdp_hdr
, 6);
2162 sdp_hdr
->src_addr
.ip6
= src6
->sin6_addr
;
2163 sdp_hdr
->dst_addr
.ip6
= dst6
->sin6_addr
;
2164 sdp_hdr
->port
= src6
->sin6_port
;
2168 cma_hdr
->cma_version
= CMA_VERSION
;
2169 cma_set_ip_ver(cma_hdr
, 6);
2170 cma_hdr
->src_addr
.ip6
= src6
->sin6_addr
;
2171 cma_hdr
->dst_addr
.ip6
= dst6
->sin6_addr
;
2172 cma_hdr
->port
= src6
->sin6_port
;
2179 static int cma_sidr_rep_handler(struct ib_cm_id
*cm_id
,
2180 struct ib_cm_event
*ib_event
)
2182 struct rdma_id_private
*id_priv
= cm_id
->context
;
2183 struct rdma_cm_event event
;
2184 struct ib_cm_sidr_rep_event_param
*rep
= &ib_event
->param
.sidr_rep_rcvd
;
2187 if (cma_disable_callback(id_priv
, CMA_CONNECT
))
2190 memset(&event
, 0, sizeof event
);
2191 switch (ib_event
->event
) {
2192 case IB_CM_SIDR_REQ_ERROR
:
2193 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2194 event
.status
= -ETIMEDOUT
;
2196 case IB_CM_SIDR_REP_RECEIVED
:
2197 event
.param
.ud
.private_data
= ib_event
->private_data
;
2198 event
.param
.ud
.private_data_len
= IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
;
2199 if (rep
->status
!= IB_SIDR_SUCCESS
) {
2200 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2201 event
.status
= ib_event
->param
.sidr_rep_rcvd
.status
;
2204 if (id_priv
->qkey
!= rep
->qkey
) {
2205 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2206 event
.status
= -EINVAL
;
2209 ib_init_ah_from_path(id_priv
->id
.device
, id_priv
->id
.port_num
,
2210 id_priv
->id
.route
.path_rec
,
2211 &event
.param
.ud
.ah_attr
);
2212 event
.param
.ud
.qp_num
= rep
->qpn
;
2213 event
.param
.ud
.qkey
= rep
->qkey
;
2214 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
2218 printk(KERN_ERR
"RDMA CMA: unexpected IB CM event: %d\n",
2223 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2225 /* Destroy the CM ID by returning a non-zero value. */
2226 id_priv
->cm_id
.ib
= NULL
;
2227 cma_exch(id_priv
, CMA_DESTROYING
);
2228 mutex_unlock(&id_priv
->handler_mutex
);
2229 rdma_destroy_id(&id_priv
->id
);
2233 mutex_unlock(&id_priv
->handler_mutex
);
2237 static int cma_resolve_ib_udp(struct rdma_id_private
*id_priv
,
2238 struct rdma_conn_param
*conn_param
)
2240 struct ib_cm_sidr_req_param req
;
2241 struct rdma_route
*route
;
2244 req
.private_data_len
= sizeof(struct cma_hdr
) +
2245 conn_param
->private_data_len
;
2246 req
.private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2247 if (!req
.private_data
)
2250 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2251 memcpy((void *) req
.private_data
+ sizeof(struct cma_hdr
),
2252 conn_param
->private_data
, conn_param
->private_data_len
);
2254 route
= &id_priv
->id
.route
;
2255 ret
= cma_format_hdr((void *) req
.private_data
, id_priv
->id
.ps
, route
);
2259 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
,
2260 cma_sidr_rep_handler
, id_priv
);
2261 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2262 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2266 req
.path
= route
->path_rec
;
2267 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2268 (struct sockaddr
*) &route
->addr
.dst_addr
);
2269 req
.timeout_ms
= 1 << (CMA_CM_RESPONSE_TIMEOUT
- 8);
2270 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2272 ret
= ib_send_cm_sidr_req(id_priv
->cm_id
.ib
, &req
);
2274 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2275 id_priv
->cm_id
.ib
= NULL
;
2278 kfree(req
.private_data
);
2282 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
2283 struct rdma_conn_param
*conn_param
)
2285 struct ib_cm_req_param req
;
2286 struct rdma_route
*route
;
2290 memset(&req
, 0, sizeof req
);
2291 offset
= cma_user_data_offset(id_priv
->id
.ps
);
2292 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
2293 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
2297 if (conn_param
->private_data
&& conn_param
->private_data_len
)
2298 memcpy(private_data
+ offset
, conn_param
->private_data
,
2299 conn_param
->private_data_len
);
2301 id_priv
->cm_id
.ib
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
,
2303 if (IS_ERR(id_priv
->cm_id
.ib
)) {
2304 ret
= PTR_ERR(id_priv
->cm_id
.ib
);
2308 route
= &id_priv
->id
.route
;
2309 ret
= cma_format_hdr(private_data
, id_priv
->id
.ps
, route
);
2312 req
.private_data
= private_data
;
2314 req
.primary_path
= &route
->path_rec
[0];
2315 if (route
->num_paths
== 2)
2316 req
.alternate_path
= &route
->path_rec
[1];
2318 req
.service_id
= cma_get_service_id(id_priv
->id
.ps
,
2319 (struct sockaddr
*) &route
->addr
.dst_addr
);
2320 req
.qp_num
= id_priv
->qp_num
;
2321 req
.qp_type
= IB_QPT_RC
;
2322 req
.starting_psn
= id_priv
->seq_num
;
2323 req
.responder_resources
= conn_param
->responder_resources
;
2324 req
.initiator_depth
= conn_param
->initiator_depth
;
2325 req
.flow_control
= conn_param
->flow_control
;
2326 req
.retry_count
= conn_param
->retry_count
;
2327 req
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2328 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2329 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
2330 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
2331 req
.srq
= id_priv
->srq
? 1 : 0;
2333 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
2335 if (ret
&& !IS_ERR(id_priv
->cm_id
.ib
)) {
2336 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
2337 id_priv
->cm_id
.ib
= NULL
;
2340 kfree(private_data
);
2344 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
2345 struct rdma_conn_param
*conn_param
)
2347 struct iw_cm_id
*cm_id
;
2348 struct sockaddr_in
* sin
;
2350 struct iw_cm_conn_param iw_param
;
2352 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
2353 if (IS_ERR(cm_id
)) {
2354 ret
= PTR_ERR(cm_id
);
2358 id_priv
->cm_id
.iw
= cm_id
;
2360 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.src_addr
;
2361 cm_id
->local_addr
= *sin
;
2363 sin
= (struct sockaddr_in
*) &id_priv
->id
.route
.addr
.dst_addr
;
2364 cm_id
->remote_addr
= *sin
;
2366 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
2370 iw_param
.ord
= conn_param
->initiator_depth
;
2371 iw_param
.ird
= conn_param
->responder_resources
;
2372 iw_param
.private_data
= conn_param
->private_data
;
2373 iw_param
.private_data_len
= conn_param
->private_data_len
;
2375 iw_param
.qpn
= id_priv
->qp_num
;
2377 iw_param
.qpn
= conn_param
->qp_num
;
2378 ret
= iw_cm_connect(cm_id
, &iw_param
);
2380 if (ret
&& !IS_ERR(cm_id
)) {
2381 iw_destroy_cm_id(cm_id
);
2382 id_priv
->cm_id
.iw
= NULL
;
2387 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2389 struct rdma_id_private
*id_priv
;
2392 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2393 if (!cma_comp_exch(id_priv
, CMA_ROUTE_RESOLVED
, CMA_CONNECT
))
2397 id_priv
->qp_num
= conn_param
->qp_num
;
2398 id_priv
->srq
= conn_param
->srq
;
2401 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2402 case RDMA_TRANSPORT_IB
:
2403 if (cma_is_ud_ps(id
->ps
))
2404 ret
= cma_resolve_ib_udp(id_priv
, conn_param
);
2406 ret
= cma_connect_ib(id_priv
, conn_param
);
2408 case RDMA_TRANSPORT_IWARP
:
2409 ret
= cma_connect_iw(id_priv
, conn_param
);
2420 cma_comp_exch(id_priv
, CMA_CONNECT
, CMA_ROUTE_RESOLVED
);
2423 EXPORT_SYMBOL(rdma_connect
);
2425 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
2426 struct rdma_conn_param
*conn_param
)
2428 struct ib_cm_rep_param rep
;
2431 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
2435 ret
= cma_modify_qp_rts(id_priv
, conn_param
);
2439 memset(&rep
, 0, sizeof rep
);
2440 rep
.qp_num
= id_priv
->qp_num
;
2441 rep
.starting_psn
= id_priv
->seq_num
;
2442 rep
.private_data
= conn_param
->private_data
;
2443 rep
.private_data_len
= conn_param
->private_data_len
;
2444 rep
.responder_resources
= conn_param
->responder_resources
;
2445 rep
.initiator_depth
= conn_param
->initiator_depth
;
2446 rep
.failover_accepted
= 0;
2447 rep
.flow_control
= conn_param
->flow_control
;
2448 rep
.rnr_retry_count
= conn_param
->rnr_retry_count
;
2449 rep
.srq
= id_priv
->srq
? 1 : 0;
2451 ret
= ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
2456 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
2457 struct rdma_conn_param
*conn_param
)
2459 struct iw_cm_conn_param iw_param
;
2462 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
2466 iw_param
.ord
= conn_param
->initiator_depth
;
2467 iw_param
.ird
= conn_param
->responder_resources
;
2468 iw_param
.private_data
= conn_param
->private_data
;
2469 iw_param
.private_data_len
= conn_param
->private_data_len
;
2470 if (id_priv
->id
.qp
) {
2471 iw_param
.qpn
= id_priv
->qp_num
;
2473 iw_param
.qpn
= conn_param
->qp_num
;
2475 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
2478 static int cma_send_sidr_rep(struct rdma_id_private
*id_priv
,
2479 enum ib_cm_sidr_status status
,
2480 const void *private_data
, int private_data_len
)
2482 struct ib_cm_sidr_rep_param rep
;
2484 memset(&rep
, 0, sizeof rep
);
2485 rep
.status
= status
;
2486 if (status
== IB_SIDR_SUCCESS
) {
2487 rep
.qp_num
= id_priv
->qp_num
;
2488 rep
.qkey
= id_priv
->qkey
;
2490 rep
.private_data
= private_data
;
2491 rep
.private_data_len
= private_data_len
;
2493 return ib_send_cm_sidr_rep(id_priv
->cm_id
.ib
, &rep
);
2496 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
2498 struct rdma_id_private
*id_priv
;
2501 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2502 if (!cma_comp(id_priv
, CMA_CONNECT
))
2505 if (!id
->qp
&& conn_param
) {
2506 id_priv
->qp_num
= conn_param
->qp_num
;
2507 id_priv
->srq
= conn_param
->srq
;
2510 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2511 case RDMA_TRANSPORT_IB
:
2512 if (cma_is_ud_ps(id
->ps
))
2513 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
2514 conn_param
->private_data
,
2515 conn_param
->private_data_len
);
2516 else if (conn_param
)
2517 ret
= cma_accept_ib(id_priv
, conn_param
);
2519 ret
= cma_rep_recv(id_priv
);
2521 case RDMA_TRANSPORT_IWARP
:
2522 ret
= cma_accept_iw(id_priv
, conn_param
);
2534 cma_modify_qp_err(id_priv
);
2535 rdma_reject(id
, NULL
, 0);
2538 EXPORT_SYMBOL(rdma_accept
);
2540 int rdma_notify(struct rdma_cm_id
*id
, enum ib_event_type event
)
2542 struct rdma_id_private
*id_priv
;
2545 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2546 if (!cma_has_cm_dev(id_priv
))
2549 switch (id
->device
->node_type
) {
2550 case RDMA_NODE_IB_CA
:
2551 ret
= ib_cm_notify(id_priv
->cm_id
.ib
, event
);
2559 EXPORT_SYMBOL(rdma_notify
);
2561 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
2562 u8 private_data_len
)
2564 struct rdma_id_private
*id_priv
;
2567 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2568 if (!cma_has_cm_dev(id_priv
))
2571 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2572 case RDMA_TRANSPORT_IB
:
2573 if (cma_is_ud_ps(id
->ps
))
2574 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_REJECT
,
2575 private_data
, private_data_len
);
2577 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
2578 IB_CM_REJ_CONSUMER_DEFINED
, NULL
,
2579 0, private_data
, private_data_len
);
2581 case RDMA_TRANSPORT_IWARP
:
2582 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
2583 private_data
, private_data_len
);
2591 EXPORT_SYMBOL(rdma_reject
);
2593 int rdma_disconnect(struct rdma_cm_id
*id
)
2595 struct rdma_id_private
*id_priv
;
2598 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2599 if (!cma_has_cm_dev(id_priv
))
2602 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2603 case RDMA_TRANSPORT_IB
:
2604 ret
= cma_modify_qp_err(id_priv
);
2607 /* Initiate or respond to a disconnect. */
2608 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
2609 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
2611 case RDMA_TRANSPORT_IWARP
:
2612 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
2621 EXPORT_SYMBOL(rdma_disconnect
);
2623 static int cma_ib_mc_handler(int status
, struct ib_sa_multicast
*multicast
)
2625 struct rdma_id_private
*id_priv
;
2626 struct cma_multicast
*mc
= multicast
->context
;
2627 struct rdma_cm_event event
;
2630 id_priv
= mc
->id_priv
;
2631 if (cma_disable_callback(id_priv
, CMA_ADDR_BOUND
) &&
2632 cma_disable_callback(id_priv
, CMA_ADDR_RESOLVED
))
2635 mutex_lock(&id_priv
->qp_mutex
);
2636 if (!status
&& id_priv
->id
.qp
)
2637 status
= ib_attach_mcast(id_priv
->id
.qp
, &multicast
->rec
.mgid
,
2638 multicast
->rec
.mlid
);
2639 mutex_unlock(&id_priv
->qp_mutex
);
2641 memset(&event
, 0, sizeof event
);
2642 event
.status
= status
;
2643 event
.param
.ud
.private_data
= mc
->context
;
2645 event
.event
= RDMA_CM_EVENT_MULTICAST_JOIN
;
2646 ib_init_ah_from_mcmember(id_priv
->id
.device
,
2647 id_priv
->id
.port_num
, &multicast
->rec
,
2648 &event
.param
.ud
.ah_attr
);
2649 event
.param
.ud
.qp_num
= 0xFFFFFF;
2650 event
.param
.ud
.qkey
= be32_to_cpu(multicast
->rec
.qkey
);
2652 event
.event
= RDMA_CM_EVENT_MULTICAST_ERROR
;
2654 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2656 cma_exch(id_priv
, CMA_DESTROYING
);
2657 mutex_unlock(&id_priv
->handler_mutex
);
2658 rdma_destroy_id(&id_priv
->id
);
2662 mutex_unlock(&id_priv
->handler_mutex
);
2666 static void cma_set_mgid(struct rdma_id_private
*id_priv
,
2667 struct sockaddr
*addr
, union ib_gid
*mgid
)
2669 unsigned char mc_map
[MAX_ADDR_LEN
];
2670 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2671 struct sockaddr_in
*sin
= (struct sockaddr_in
*) addr
;
2672 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) addr
;
2674 if (cma_any_addr(addr
)) {
2675 memset(mgid
, 0, sizeof *mgid
);
2676 } else if ((addr
->sa_family
== AF_INET6
) &&
2677 ((be32_to_cpu(sin6
->sin6_addr
.s6_addr32
[0]) & 0xFF10A01B) ==
2679 /* IPv6 address is an SA assigned MGID. */
2680 memcpy(mgid
, &sin6
->sin6_addr
, sizeof *mgid
);
2682 ip_ib_mc_map(sin
->sin_addr
.s_addr
, dev_addr
->broadcast
, mc_map
);
2683 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2684 mc_map
[7] = 0x01; /* Use RDMA CM signature */
2685 *mgid
= *(union ib_gid
*) (mc_map
+ 4);
2689 static int cma_join_ib_multicast(struct rdma_id_private
*id_priv
,
2690 struct cma_multicast
*mc
)
2692 struct ib_sa_mcmember_rec rec
;
2693 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2694 ib_sa_comp_mask comp_mask
;
2697 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
2698 ret
= ib_sa_get_mcmember_rec(id_priv
->id
.device
, id_priv
->id
.port_num
,
2703 cma_set_mgid(id_priv
, (struct sockaddr
*) &mc
->addr
, &rec
.mgid
);
2704 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
2705 rec
.qkey
= cpu_to_be32(RDMA_UDP_QKEY
);
2706 ib_addr_get_sgid(dev_addr
, &rec
.port_gid
);
2707 rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(dev_addr
));
2710 comp_mask
= IB_SA_MCMEMBER_REC_MGID
| IB_SA_MCMEMBER_REC_PORT_GID
|
2711 IB_SA_MCMEMBER_REC_PKEY
| IB_SA_MCMEMBER_REC_JOIN_STATE
|
2712 IB_SA_MCMEMBER_REC_QKEY
| IB_SA_MCMEMBER_REC_SL
|
2713 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
2714 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
;
2716 mc
->multicast
.ib
= ib_sa_join_multicast(&sa_client
, id_priv
->id
.device
,
2717 id_priv
->id
.port_num
, &rec
,
2718 comp_mask
, GFP_KERNEL
,
2719 cma_ib_mc_handler
, mc
);
2720 if (IS_ERR(mc
->multicast
.ib
))
2721 return PTR_ERR(mc
->multicast
.ib
);
2726 int rdma_join_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
,
2729 struct rdma_id_private
*id_priv
;
2730 struct cma_multicast
*mc
;
2733 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2734 if (!cma_comp(id_priv
, CMA_ADDR_BOUND
) &&
2735 !cma_comp(id_priv
, CMA_ADDR_RESOLVED
))
2738 mc
= kmalloc(sizeof *mc
, GFP_KERNEL
);
2742 memcpy(&mc
->addr
, addr
, ip_addr_size(addr
));
2743 mc
->context
= context
;
2744 mc
->id_priv
= id_priv
;
2746 spin_lock(&id_priv
->lock
);
2747 list_add(&mc
->list
, &id_priv
->mc_list
);
2748 spin_unlock(&id_priv
->lock
);
2750 switch (rdma_node_get_transport(id
->device
->node_type
)) {
2751 case RDMA_TRANSPORT_IB
:
2752 ret
= cma_join_ib_multicast(id_priv
, mc
);
2760 spin_lock_irq(&id_priv
->lock
);
2761 list_del(&mc
->list
);
2762 spin_unlock_irq(&id_priv
->lock
);
2767 EXPORT_SYMBOL(rdma_join_multicast
);
2769 void rdma_leave_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
2771 struct rdma_id_private
*id_priv
;
2772 struct cma_multicast
*mc
;
2774 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2775 spin_lock_irq(&id_priv
->lock
);
2776 list_for_each_entry(mc
, &id_priv
->mc_list
, list
) {
2777 if (!memcmp(&mc
->addr
, addr
, ip_addr_size(addr
))) {
2778 list_del(&mc
->list
);
2779 spin_unlock_irq(&id_priv
->lock
);
2782 ib_detach_mcast(id
->qp
,
2783 &mc
->multicast
.ib
->rec
.mgid
,
2784 mc
->multicast
.ib
->rec
.mlid
);
2785 ib_sa_free_multicast(mc
->multicast
.ib
);
2790 spin_unlock_irq(&id_priv
->lock
);
2792 EXPORT_SYMBOL(rdma_leave_multicast
);
2794 static int cma_netdev_change(struct net_device
*ndev
, struct rdma_id_private
*id_priv
)
2796 struct rdma_dev_addr
*dev_addr
;
2797 struct cma_ndev_work
*work
;
2799 dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2801 if ((dev_addr
->src_dev
== ndev
) &&
2802 memcmp(dev_addr
->src_dev_addr
, ndev
->dev_addr
, ndev
->addr_len
)) {
2803 printk(KERN_INFO
"RDMA CM addr change for ndev %s used by id %p\n",
2804 ndev
->name
, &id_priv
->id
);
2805 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2809 INIT_WORK(&work
->work
, cma_ndev_work_handler
);
2811 work
->event
.event
= RDMA_CM_EVENT_ADDR_CHANGE
;
2812 atomic_inc(&id_priv
->refcount
);
2813 queue_work(cma_wq
, &work
->work
);
2819 static int cma_netdev_callback(struct notifier_block
*self
, unsigned long event
,
2822 struct net_device
*ndev
= (struct net_device
*)ctx
;
2823 struct cma_device
*cma_dev
;
2824 struct rdma_id_private
*id_priv
;
2825 int ret
= NOTIFY_DONE
;
2827 if (dev_net(ndev
) != &init_net
)
2830 if (event
!= NETDEV_BONDING_FAILOVER
)
2833 if (!(ndev
->flags
& IFF_MASTER
) || !(ndev
->priv_flags
& IFF_BONDING
))
2837 list_for_each_entry(cma_dev
, &dev_list
, list
)
2838 list_for_each_entry(id_priv
, &cma_dev
->id_list
, list
) {
2839 ret
= cma_netdev_change(ndev
, id_priv
);
2845 mutex_unlock(&lock
);
2849 static struct notifier_block cma_nb
= {
2850 .notifier_call
= cma_netdev_callback
2853 static void cma_add_one(struct ib_device
*device
)
2855 struct cma_device
*cma_dev
;
2856 struct rdma_id_private
*id_priv
;
2858 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
2862 cma_dev
->device
= device
;
2864 init_completion(&cma_dev
->comp
);
2865 atomic_set(&cma_dev
->refcount
, 1);
2866 INIT_LIST_HEAD(&cma_dev
->id_list
);
2867 ib_set_client_data(device
, &cma_client
, cma_dev
);
2870 list_add_tail(&cma_dev
->list
, &dev_list
);
2871 list_for_each_entry(id_priv
, &listen_any_list
, list
)
2872 cma_listen_on_dev(id_priv
, cma_dev
);
2873 mutex_unlock(&lock
);
2876 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
2878 struct rdma_cm_event event
;
2879 enum cma_state state
;
2882 /* Record that we want to remove the device */
2883 state
= cma_exch(id_priv
, CMA_DEVICE_REMOVAL
);
2884 if (state
== CMA_DESTROYING
)
2887 cma_cancel_operation(id_priv
, state
);
2888 mutex_lock(&id_priv
->handler_mutex
);
2890 /* Check for destruction from another callback. */
2891 if (!cma_comp(id_priv
, CMA_DEVICE_REMOVAL
))
2894 memset(&event
, 0, sizeof event
);
2895 event
.event
= RDMA_CM_EVENT_DEVICE_REMOVAL
;
2896 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2898 mutex_unlock(&id_priv
->handler_mutex
);
2902 static void cma_process_remove(struct cma_device
*cma_dev
)
2904 struct rdma_id_private
*id_priv
;
2908 while (!list_empty(&cma_dev
->id_list
)) {
2909 id_priv
= list_entry(cma_dev
->id_list
.next
,
2910 struct rdma_id_private
, list
);
2912 list_del(&id_priv
->listen_list
);
2913 list_del_init(&id_priv
->list
);
2914 atomic_inc(&id_priv
->refcount
);
2915 mutex_unlock(&lock
);
2917 ret
= id_priv
->internal_id
? 1 : cma_remove_id_dev(id_priv
);
2918 cma_deref_id(id_priv
);
2920 rdma_destroy_id(&id_priv
->id
);
2924 mutex_unlock(&lock
);
2926 cma_deref_dev(cma_dev
);
2927 wait_for_completion(&cma_dev
->comp
);
2930 static void cma_remove_one(struct ib_device
*device
)
2932 struct cma_device
*cma_dev
;
2934 cma_dev
= ib_get_client_data(device
, &cma_client
);
2939 list_del(&cma_dev
->list
);
2940 mutex_unlock(&lock
);
2942 cma_process_remove(cma_dev
);
2946 static int cma_init(void)
2948 int ret
, low
, high
, remaining
;
2950 get_random_bytes(&next_port
, sizeof next_port
);
2951 inet_get_local_port_range(&low
, &high
);
2952 remaining
= (high
- low
) + 1;
2953 next_port
= ((unsigned int) next_port
% remaining
) + low
;
2955 cma_wq
= create_singlethread_workqueue("rdma_cm");
2959 ib_sa_register_client(&sa_client
);
2960 rdma_addr_register_client(&addr_client
);
2961 register_netdevice_notifier(&cma_nb
);
2963 ret
= ib_register_client(&cma_client
);
2969 unregister_netdevice_notifier(&cma_nb
);
2970 rdma_addr_unregister_client(&addr_client
);
2971 ib_sa_unregister_client(&sa_client
);
2972 destroy_workqueue(cma_wq
);
2976 static void cma_cleanup(void)
2978 ib_unregister_client(&cma_client
);
2979 unregister_netdevice_notifier(&cma_nb
);
2980 rdma_addr_unregister_client(&addr_client
);
2981 ib_sa_unregister_client(&sa_client
);
2982 destroy_workqueue(cma_wq
);
2983 idr_destroy(&sdp_ps
);
2984 idr_destroy(&tcp_ps
);
2985 idr_destroy(&udp_ps
);
2986 idr_destroy(&ipoib_ps
);
2989 module_init(cma_init
);
2990 module_exit(cma_cleanup
);