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/igmp.h>
42 #include <linux/idr.h>
43 #include <linux/inetdevice.h>
44 #include <linux/slab.h>
45 #include <linux/module.h>
46 #include <net/route.h>
48 #include <net/net_namespace.h>
49 #include <net/netns/generic.h>
52 #include <net/ip_fib.h>
53 #include <net/ip6_route.h>
55 #include <rdma/rdma_cm.h>
56 #include <rdma/rdma_cm_ib.h>
57 #include <rdma/rdma_netlink.h>
59 #include <rdma/ib_cache.h>
60 #include <rdma/ib_cm.h>
61 #include <rdma/ib_sa.h>
62 #include <rdma/iw_cm.h>
64 #include "core_priv.h"
66 MODULE_AUTHOR("Sean Hefty");
67 MODULE_DESCRIPTION("Generic RDMA CM Agent");
68 MODULE_LICENSE("Dual BSD/GPL");
70 #define CMA_CM_RESPONSE_TIMEOUT 20
71 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
72 #define CMA_MAX_CM_RETRIES 15
73 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
74 #define CMA_IBOE_PACKET_LIFETIME 18
76 static const char * const cma_events
[] = {
77 [RDMA_CM_EVENT_ADDR_RESOLVED
] = "address resolved",
78 [RDMA_CM_EVENT_ADDR_ERROR
] = "address error",
79 [RDMA_CM_EVENT_ROUTE_RESOLVED
] = "route resolved ",
80 [RDMA_CM_EVENT_ROUTE_ERROR
] = "route error",
81 [RDMA_CM_EVENT_CONNECT_REQUEST
] = "connect request",
82 [RDMA_CM_EVENT_CONNECT_RESPONSE
] = "connect response",
83 [RDMA_CM_EVENT_CONNECT_ERROR
] = "connect error",
84 [RDMA_CM_EVENT_UNREACHABLE
] = "unreachable",
85 [RDMA_CM_EVENT_REJECTED
] = "rejected",
86 [RDMA_CM_EVENT_ESTABLISHED
] = "established",
87 [RDMA_CM_EVENT_DISCONNECTED
] = "disconnected",
88 [RDMA_CM_EVENT_DEVICE_REMOVAL
] = "device removal",
89 [RDMA_CM_EVENT_MULTICAST_JOIN
] = "multicast join",
90 [RDMA_CM_EVENT_MULTICAST_ERROR
] = "multicast error",
91 [RDMA_CM_EVENT_ADDR_CHANGE
] = "address change",
92 [RDMA_CM_EVENT_TIMEWAIT_EXIT
] = "timewait exit",
95 const char *__attribute_const__
rdma_event_msg(enum rdma_cm_event_type event
)
99 return (index
< ARRAY_SIZE(cma_events
) && cma_events
[index
]) ?
100 cma_events
[index
] : "unrecognized event";
102 EXPORT_SYMBOL(rdma_event_msg
);
104 static void cma_add_one(struct ib_device
*device
);
105 static void cma_remove_one(struct ib_device
*device
, void *client_data
);
107 static struct ib_client cma_client
= {
110 .remove
= cma_remove_one
113 static struct ib_sa_client sa_client
;
114 static struct rdma_addr_client addr_client
;
115 static LIST_HEAD(dev_list
);
116 static LIST_HEAD(listen_any_list
);
117 static DEFINE_MUTEX(lock
);
118 static struct workqueue_struct
*cma_wq
;
119 static int cma_pernet_id
;
128 static struct cma_pernet
*cma_pernet(struct net
*net
)
130 return net_generic(net
, cma_pernet_id
);
133 static struct idr
*cma_pernet_idr(struct net
*net
, enum rdma_port_space ps
)
135 struct cma_pernet
*pernet
= cma_pernet(net
);
139 return &pernet
->tcp_ps
;
141 return &pernet
->udp_ps
;
143 return &pernet
->ipoib_ps
;
145 return &pernet
->ib_ps
;
152 struct list_head list
;
153 struct ib_device
*device
;
154 struct completion comp
;
156 struct list_head id_list
;
157 enum ib_gid_type
*default_gid_type
;
160 struct rdma_bind_list
{
161 enum rdma_port_space ps
;
162 struct hlist_head owners
;
166 struct class_port_info_context
{
167 struct ib_class_port_info
*class_port_info
;
168 struct ib_device
*device
;
169 struct completion done
;
170 struct ib_sa_query
*sa_query
;
174 static int cma_ps_alloc(struct net
*net
, enum rdma_port_space ps
,
175 struct rdma_bind_list
*bind_list
, int snum
)
177 struct idr
*idr
= cma_pernet_idr(net
, ps
);
179 return idr_alloc(idr
, bind_list
, snum
, snum
+ 1, GFP_KERNEL
);
182 static struct rdma_bind_list
*cma_ps_find(struct net
*net
,
183 enum rdma_port_space ps
, int snum
)
185 struct idr
*idr
= cma_pernet_idr(net
, ps
);
187 return idr_find(idr
, snum
);
190 static void cma_ps_remove(struct net
*net
, enum rdma_port_space ps
, int snum
)
192 struct idr
*idr
= cma_pernet_idr(net
, ps
);
194 idr_remove(idr
, snum
);
201 void cma_ref_dev(struct cma_device
*cma_dev
)
203 atomic_inc(&cma_dev
->refcount
);
206 struct cma_device
*cma_enum_devices_by_ibdev(cma_device_filter filter
,
209 struct cma_device
*cma_dev
;
210 struct cma_device
*found_cma_dev
= NULL
;
214 list_for_each_entry(cma_dev
, &dev_list
, list
)
215 if (filter(cma_dev
->device
, cookie
)) {
216 found_cma_dev
= cma_dev
;
221 cma_ref_dev(found_cma_dev
);
223 return found_cma_dev
;
226 int cma_get_default_gid_type(struct cma_device
*cma_dev
,
229 if (port
< rdma_start_port(cma_dev
->device
) ||
230 port
> rdma_end_port(cma_dev
->device
))
233 return cma_dev
->default_gid_type
[port
- rdma_start_port(cma_dev
->device
)];
236 int cma_set_default_gid_type(struct cma_device
*cma_dev
,
238 enum ib_gid_type default_gid_type
)
240 unsigned long supported_gids
;
242 if (port
< rdma_start_port(cma_dev
->device
) ||
243 port
> rdma_end_port(cma_dev
->device
))
246 supported_gids
= roce_gid_type_mask_support(cma_dev
->device
, port
);
248 if (!(supported_gids
& 1 << default_gid_type
))
251 cma_dev
->default_gid_type
[port
- rdma_start_port(cma_dev
->device
)] =
257 struct ib_device
*cma_get_ib_dev(struct cma_device
*cma_dev
)
259 return cma_dev
->device
;
263 * Device removal can occur at anytime, so we need extra handling to
264 * serialize notifying the user of device removal with other callbacks.
265 * We do this by disabling removal notification while a callback is in process,
266 * and reporting it after the callback completes.
268 struct rdma_id_private
{
269 struct rdma_cm_id id
;
271 struct rdma_bind_list
*bind_list
;
272 struct hlist_node node
;
273 struct list_head list
; /* listen_any_list or cma_device.list */
274 struct list_head listen_list
; /* per device listens */
275 struct cma_device
*cma_dev
;
276 struct list_head mc_list
;
279 enum rdma_cm_state state
;
281 struct mutex qp_mutex
;
283 struct completion comp
;
285 struct mutex handler_mutex
;
289 struct ib_sa_query
*query
;
305 enum ib_gid_type gid_type
;
308 struct cma_multicast
{
309 struct rdma_id_private
*id_priv
;
311 struct ib_sa_multicast
*ib
;
313 struct list_head list
;
315 struct sockaddr_storage addr
;
322 struct work_struct work
;
323 struct rdma_id_private
*id
;
324 enum rdma_cm_state old_state
;
325 enum rdma_cm_state new_state
;
326 struct rdma_cm_event event
;
329 struct cma_ndev_work
{
330 struct work_struct work
;
331 struct rdma_id_private
*id
;
332 struct rdma_cm_event event
;
335 struct iboe_mcast_work
{
336 struct work_struct work
;
337 struct rdma_id_private
*id
;
338 struct cma_multicast
*mc
;
351 u8 ip_version
; /* IP version: 7:4 */
353 union cma_ip_addr src_addr
;
354 union cma_ip_addr dst_addr
;
357 #define CMA_VERSION 0x00
359 struct cma_req_info
{
360 struct ib_device
*device
;
362 union ib_gid local_gid
;
368 static int cma_comp(struct rdma_id_private
*id_priv
, enum rdma_cm_state comp
)
373 spin_lock_irqsave(&id_priv
->lock
, flags
);
374 ret
= (id_priv
->state
== comp
);
375 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
379 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
380 enum rdma_cm_state comp
, enum rdma_cm_state exch
)
385 spin_lock_irqsave(&id_priv
->lock
, flags
);
386 if ((ret
= (id_priv
->state
== comp
)))
387 id_priv
->state
= exch
;
388 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
392 static enum rdma_cm_state
cma_exch(struct rdma_id_private
*id_priv
,
393 enum rdma_cm_state exch
)
396 enum rdma_cm_state old
;
398 spin_lock_irqsave(&id_priv
->lock
, flags
);
399 old
= id_priv
->state
;
400 id_priv
->state
= exch
;
401 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
405 static inline u8
cma_get_ip_ver(const struct cma_hdr
*hdr
)
407 return hdr
->ip_version
>> 4;
410 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
412 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
415 static int cma_igmp_send(struct net_device
*ndev
, union ib_gid
*mgid
, bool join
)
417 struct in_device
*in_dev
= NULL
;
421 in_dev
= __in_dev_get_rtnl(ndev
);
424 ip_mc_inc_group(in_dev
,
425 *(__be32
*)(mgid
->raw
+ 12));
427 ip_mc_dec_group(in_dev
,
428 *(__be32
*)(mgid
->raw
+ 12));
432 return (in_dev
) ? 0 : -ENODEV
;
435 static void _cma_attach_to_dev(struct rdma_id_private
*id_priv
,
436 struct cma_device
*cma_dev
)
438 cma_ref_dev(cma_dev
);
439 id_priv
->cma_dev
= cma_dev
;
440 id_priv
->gid_type
= 0;
441 id_priv
->id
.device
= cma_dev
->device
;
442 id_priv
->id
.route
.addr
.dev_addr
.transport
=
443 rdma_node_get_transport(cma_dev
->device
->node_type
);
444 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
447 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
448 struct cma_device
*cma_dev
)
450 _cma_attach_to_dev(id_priv
, cma_dev
);
452 cma_dev
->default_gid_type
[id_priv
->id
.port_num
-
453 rdma_start_port(cma_dev
->device
)];
456 void cma_deref_dev(struct cma_device
*cma_dev
)
458 if (atomic_dec_and_test(&cma_dev
->refcount
))
459 complete(&cma_dev
->comp
);
462 static inline void release_mc(struct kref
*kref
)
464 struct cma_multicast
*mc
= container_of(kref
, struct cma_multicast
, mcref
);
466 kfree(mc
->multicast
.ib
);
470 static void cma_release_dev(struct rdma_id_private
*id_priv
)
473 list_del(&id_priv
->list
);
474 cma_deref_dev(id_priv
->cma_dev
);
475 id_priv
->cma_dev
= NULL
;
479 static inline struct sockaddr
*cma_src_addr(struct rdma_id_private
*id_priv
)
481 return (struct sockaddr
*) &id_priv
->id
.route
.addr
.src_addr
;
484 static inline struct sockaddr
*cma_dst_addr(struct rdma_id_private
*id_priv
)
486 return (struct sockaddr
*) &id_priv
->id
.route
.addr
.dst_addr
;
489 static inline unsigned short cma_family(struct rdma_id_private
*id_priv
)
491 return id_priv
->id
.route
.addr
.src_addr
.ss_family
;
494 static int cma_set_qkey(struct rdma_id_private
*id_priv
, u32 qkey
)
496 struct ib_sa_mcmember_rec rec
;
500 if (qkey
&& id_priv
->qkey
!= qkey
)
506 id_priv
->qkey
= qkey
;
510 switch (id_priv
->id
.ps
) {
513 id_priv
->qkey
= RDMA_UDP_QKEY
;
516 ib_addr_get_mgid(&id_priv
->id
.route
.addr
.dev_addr
, &rec
.mgid
);
517 ret
= ib_sa_get_mcmember_rec(id_priv
->id
.device
,
518 id_priv
->id
.port_num
, &rec
.mgid
,
521 id_priv
->qkey
= be32_to_cpu(rec
.qkey
);
529 static void cma_translate_ib(struct sockaddr_ib
*sib
, struct rdma_dev_addr
*dev_addr
)
531 dev_addr
->dev_type
= ARPHRD_INFINIBAND
;
532 rdma_addr_set_sgid(dev_addr
, (union ib_gid
*) &sib
->sib_addr
);
533 ib_addr_set_pkey(dev_addr
, ntohs(sib
->sib_pkey
));
536 static int cma_translate_addr(struct sockaddr
*addr
, struct rdma_dev_addr
*dev_addr
)
540 if (addr
->sa_family
!= AF_IB
) {
541 ret
= rdma_translate_ip(addr
, dev_addr
, NULL
);
543 cma_translate_ib((struct sockaddr_ib
*) addr
, dev_addr
);
550 static inline int cma_validate_port(struct ib_device
*device
, u8 port
,
551 enum ib_gid_type gid_type
,
552 union ib_gid
*gid
, int dev_type
,
556 struct net_device
*ndev
= NULL
;
558 if ((dev_type
== ARPHRD_INFINIBAND
) && !rdma_protocol_ib(device
, port
))
561 if ((dev_type
!= ARPHRD_INFINIBAND
) && rdma_protocol_ib(device
, port
))
564 if (dev_type
== ARPHRD_ETHER
&& rdma_protocol_roce(device
, port
)) {
565 ndev
= dev_get_by_index(&init_net
, bound_if_index
);
566 if (ndev
&& ndev
->flags
& IFF_LOOPBACK
) {
567 pr_info("detected loopback device\n");
570 if (!device
->get_netdev
)
573 ndev
= device
->get_netdev(device
, port
);
578 gid_type
= IB_GID_TYPE_IB
;
581 ret
= ib_find_cached_gid_by_port(device
, gid
, gid_type
, port
,
590 static int cma_acquire_dev(struct rdma_id_private
*id_priv
,
591 struct rdma_id_private
*listen_id_priv
)
593 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
594 struct cma_device
*cma_dev
;
595 union ib_gid gid
, iboe_gid
, *gidp
;
599 if (dev_addr
->dev_type
!= ARPHRD_INFINIBAND
&&
600 id_priv
->id
.ps
== RDMA_PS_IPOIB
)
604 rdma_ip2gid((struct sockaddr
*)&id_priv
->id
.route
.addr
.src_addr
,
607 memcpy(&gid
, dev_addr
->src_dev_addr
+
608 rdma_addr_gid_offset(dev_addr
), sizeof gid
);
610 if (listen_id_priv
) {
611 cma_dev
= listen_id_priv
->cma_dev
;
612 port
= listen_id_priv
->id
.port_num
;
613 gidp
= rdma_protocol_roce(cma_dev
->device
, port
) ?
616 ret
= cma_validate_port(cma_dev
->device
, port
,
617 rdma_protocol_ib(cma_dev
->device
, port
) ?
619 listen_id_priv
->gid_type
, gidp
,
621 dev_addr
->bound_dev_if
);
623 id_priv
->id
.port_num
= port
;
628 list_for_each_entry(cma_dev
, &dev_list
, list
) {
629 for (port
= 1; port
<= cma_dev
->device
->phys_port_cnt
; ++port
) {
630 if (listen_id_priv
&&
631 listen_id_priv
->cma_dev
== cma_dev
&&
632 listen_id_priv
->id
.port_num
== port
)
635 gidp
= rdma_protocol_roce(cma_dev
->device
, port
) ?
638 ret
= cma_validate_port(cma_dev
->device
, port
,
639 rdma_protocol_ib(cma_dev
->device
, port
) ?
641 cma_dev
->default_gid_type
[port
- 1],
642 gidp
, dev_addr
->dev_type
,
643 dev_addr
->bound_dev_if
);
645 id_priv
->id
.port_num
= port
;
653 cma_attach_to_dev(id_priv
, cma_dev
);
660 * Select the source IB device and address to reach the destination IB address.
662 static int cma_resolve_ib_dev(struct rdma_id_private
*id_priv
)
664 struct cma_device
*cma_dev
, *cur_dev
;
665 struct sockaddr_ib
*addr
;
666 union ib_gid gid
, sgid
, *dgid
;
672 addr
= (struct sockaddr_ib
*) cma_dst_addr(id_priv
);
673 dgid
= (union ib_gid
*) &addr
->sib_addr
;
674 pkey
= ntohs(addr
->sib_pkey
);
676 list_for_each_entry(cur_dev
, &dev_list
, list
) {
677 for (p
= 1; p
<= cur_dev
->device
->phys_port_cnt
; ++p
) {
678 if (!rdma_cap_af_ib(cur_dev
->device
, p
))
681 if (ib_find_cached_pkey(cur_dev
->device
, p
, pkey
, &index
))
684 for (i
= 0; !ib_get_cached_gid(cur_dev
->device
, p
, i
,
687 if (!memcmp(&gid
, dgid
, sizeof(gid
))) {
690 id_priv
->id
.port_num
= p
;
694 if (!cma_dev
&& (gid
.global
.subnet_prefix
==
695 dgid
->global
.subnet_prefix
)) {
698 id_priv
->id
.port_num
= p
;
708 cma_attach_to_dev(id_priv
, cma_dev
);
709 addr
= (struct sockaddr_ib
*) cma_src_addr(id_priv
);
710 memcpy(&addr
->sib_addr
, &sgid
, sizeof sgid
);
711 cma_translate_ib(addr
, &id_priv
->id
.route
.addr
.dev_addr
);
715 static void cma_deref_id(struct rdma_id_private
*id_priv
)
717 if (atomic_dec_and_test(&id_priv
->refcount
))
718 complete(&id_priv
->comp
);
721 struct rdma_cm_id
*rdma_create_id(struct net
*net
,
722 rdma_cm_event_handler event_handler
,
723 void *context
, enum rdma_port_space ps
,
724 enum ib_qp_type qp_type
)
726 struct rdma_id_private
*id_priv
;
728 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
730 return ERR_PTR(-ENOMEM
);
732 id_priv
->owner
= task_pid_nr(current
);
733 id_priv
->state
= RDMA_CM_IDLE
;
734 id_priv
->id
.context
= context
;
735 id_priv
->id
.event_handler
= event_handler
;
737 id_priv
->id
.qp_type
= qp_type
;
738 spin_lock_init(&id_priv
->lock
);
739 mutex_init(&id_priv
->qp_mutex
);
740 init_completion(&id_priv
->comp
);
741 atomic_set(&id_priv
->refcount
, 1);
742 mutex_init(&id_priv
->handler_mutex
);
743 INIT_LIST_HEAD(&id_priv
->listen_list
);
744 INIT_LIST_HEAD(&id_priv
->mc_list
);
745 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
746 id_priv
->id
.route
.addr
.dev_addr
.net
= get_net(net
);
750 EXPORT_SYMBOL(rdma_create_id
);
752 static int cma_init_ud_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
754 struct ib_qp_attr qp_attr
;
755 int qp_attr_mask
, ret
;
757 qp_attr
.qp_state
= IB_QPS_INIT
;
758 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
762 ret
= ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
766 qp_attr
.qp_state
= IB_QPS_RTR
;
767 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
);
771 qp_attr
.qp_state
= IB_QPS_RTS
;
773 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
778 static int cma_init_conn_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
780 struct ib_qp_attr qp_attr
;
781 int qp_attr_mask
, ret
;
783 qp_attr
.qp_state
= IB_QPS_INIT
;
784 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
788 return ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
791 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
792 struct ib_qp_init_attr
*qp_init_attr
)
794 struct rdma_id_private
*id_priv
;
798 id_priv
= container_of(id
, struct rdma_id_private
, id
);
799 if (id
->device
!= pd
->device
)
802 qp_init_attr
->port_num
= id
->port_num
;
803 qp
= ib_create_qp(pd
, qp_init_attr
);
807 if (id
->qp_type
== IB_QPT_UD
)
808 ret
= cma_init_ud_qp(id_priv
, qp
);
810 ret
= cma_init_conn_qp(id_priv
, qp
);
815 id_priv
->qp_num
= qp
->qp_num
;
816 id_priv
->srq
= (qp
->srq
!= NULL
);
822 EXPORT_SYMBOL(rdma_create_qp
);
824 void rdma_destroy_qp(struct rdma_cm_id
*id
)
826 struct rdma_id_private
*id_priv
;
828 id_priv
= container_of(id
, struct rdma_id_private
, id
);
829 mutex_lock(&id_priv
->qp_mutex
);
830 ib_destroy_qp(id_priv
->id
.qp
);
831 id_priv
->id
.qp
= NULL
;
832 mutex_unlock(&id_priv
->qp_mutex
);
834 EXPORT_SYMBOL(rdma_destroy_qp
);
836 static int cma_modify_qp_rtr(struct rdma_id_private
*id_priv
,
837 struct rdma_conn_param
*conn_param
)
839 struct ib_qp_attr qp_attr
;
840 int qp_attr_mask
, ret
;
843 mutex_lock(&id_priv
->qp_mutex
);
844 if (!id_priv
->id
.qp
) {
849 /* Need to update QP attributes from default values. */
850 qp_attr
.qp_state
= IB_QPS_INIT
;
851 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
855 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
859 qp_attr
.qp_state
= IB_QPS_RTR
;
860 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
864 ret
= ib_query_gid(id_priv
->id
.device
, id_priv
->id
.port_num
,
865 qp_attr
.ah_attr
.grh
.sgid_index
, &sgid
, NULL
);
869 BUG_ON(id_priv
->cma_dev
->device
!= id_priv
->id
.device
);
872 qp_attr
.max_dest_rd_atomic
= conn_param
->responder_resources
;
873 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
875 mutex_unlock(&id_priv
->qp_mutex
);
879 static int cma_modify_qp_rts(struct rdma_id_private
*id_priv
,
880 struct rdma_conn_param
*conn_param
)
882 struct ib_qp_attr qp_attr
;
883 int qp_attr_mask
, ret
;
885 mutex_lock(&id_priv
->qp_mutex
);
886 if (!id_priv
->id
.qp
) {
891 qp_attr
.qp_state
= IB_QPS_RTS
;
892 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
897 qp_attr
.max_rd_atomic
= conn_param
->initiator_depth
;
898 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
900 mutex_unlock(&id_priv
->qp_mutex
);
904 static int cma_modify_qp_err(struct rdma_id_private
*id_priv
)
906 struct ib_qp_attr qp_attr
;
909 mutex_lock(&id_priv
->qp_mutex
);
910 if (!id_priv
->id
.qp
) {
915 qp_attr
.qp_state
= IB_QPS_ERR
;
916 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, IB_QP_STATE
);
918 mutex_unlock(&id_priv
->qp_mutex
);
922 static int cma_ib_init_qp_attr(struct rdma_id_private
*id_priv
,
923 struct ib_qp_attr
*qp_attr
, int *qp_attr_mask
)
925 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
929 if (rdma_cap_eth_ah(id_priv
->id
.device
, id_priv
->id
.port_num
))
932 pkey
= ib_addr_get_pkey(dev_addr
);
934 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
935 pkey
, &qp_attr
->pkey_index
);
939 qp_attr
->port_num
= id_priv
->id
.port_num
;
940 *qp_attr_mask
= IB_QP_STATE
| IB_QP_PKEY_INDEX
| IB_QP_PORT
;
942 if (id_priv
->id
.qp_type
== IB_QPT_UD
) {
943 ret
= cma_set_qkey(id_priv
, 0);
947 qp_attr
->qkey
= id_priv
->qkey
;
948 *qp_attr_mask
|= IB_QP_QKEY
;
950 qp_attr
->qp_access_flags
= 0;
951 *qp_attr_mask
|= IB_QP_ACCESS_FLAGS
;
956 int rdma_init_qp_attr(struct rdma_cm_id
*id
, struct ib_qp_attr
*qp_attr
,
959 struct rdma_id_private
*id_priv
;
962 id_priv
= container_of(id
, struct rdma_id_private
, id
);
963 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
964 if (!id_priv
->cm_id
.ib
|| (id_priv
->id
.qp_type
== IB_QPT_UD
))
965 ret
= cma_ib_init_qp_attr(id_priv
, qp_attr
, qp_attr_mask
);
967 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, qp_attr
,
970 if (qp_attr
->qp_state
== IB_QPS_RTR
)
971 qp_attr
->rq_psn
= id_priv
->seq_num
;
972 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
)) {
973 if (!id_priv
->cm_id
.iw
) {
974 qp_attr
->qp_access_flags
= 0;
975 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
;
977 ret
= iw_cm_init_qp_attr(id_priv
->cm_id
.iw
, qp_attr
,
984 EXPORT_SYMBOL(rdma_init_qp_attr
);
986 static inline int cma_zero_addr(struct sockaddr
*addr
)
988 switch (addr
->sa_family
) {
990 return ipv4_is_zeronet(((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
);
992 return ipv6_addr_any(&((struct sockaddr_in6
*) addr
)->sin6_addr
);
994 return ib_addr_any(&((struct sockaddr_ib
*) addr
)->sib_addr
);
1000 static inline int cma_loopback_addr(struct sockaddr
*addr
)
1002 switch (addr
->sa_family
) {
1004 return ipv4_is_loopback(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
1006 return ipv6_addr_loopback(&((struct sockaddr_in6
*) addr
)->sin6_addr
);
1008 return ib_addr_loopback(&((struct sockaddr_ib
*) addr
)->sib_addr
);
1014 static inline int cma_any_addr(struct sockaddr
*addr
)
1016 return cma_zero_addr(addr
) || cma_loopback_addr(addr
);
1019 static int cma_addr_cmp(struct sockaddr
*src
, struct sockaddr
*dst
)
1021 if (src
->sa_family
!= dst
->sa_family
)
1024 switch (src
->sa_family
) {
1026 return ((struct sockaddr_in
*) src
)->sin_addr
.s_addr
!=
1027 ((struct sockaddr_in
*) dst
)->sin_addr
.s_addr
;
1029 return ipv6_addr_cmp(&((struct sockaddr_in6
*) src
)->sin6_addr
,
1030 &((struct sockaddr_in6
*) dst
)->sin6_addr
);
1032 return ib_addr_cmp(&((struct sockaddr_ib
*) src
)->sib_addr
,
1033 &((struct sockaddr_ib
*) dst
)->sib_addr
);
1037 static __be16
cma_port(struct sockaddr
*addr
)
1039 struct sockaddr_ib
*sib
;
1041 switch (addr
->sa_family
) {
1043 return ((struct sockaddr_in
*) addr
)->sin_port
;
1045 return ((struct sockaddr_in6
*) addr
)->sin6_port
;
1047 sib
= (struct sockaddr_ib
*) addr
;
1048 return htons((u16
) (be64_to_cpu(sib
->sib_sid
) &
1049 be64_to_cpu(sib
->sib_sid_mask
)));
1055 static inline int cma_any_port(struct sockaddr
*addr
)
1057 return !cma_port(addr
);
1060 static void cma_save_ib_info(struct sockaddr
*src_addr
,
1061 struct sockaddr
*dst_addr
,
1062 struct rdma_cm_id
*listen_id
,
1063 struct ib_sa_path_rec
*path
)
1065 struct sockaddr_ib
*listen_ib
, *ib
;
1067 listen_ib
= (struct sockaddr_ib
*) &listen_id
->route
.addr
.src_addr
;
1069 ib
= (struct sockaddr_ib
*)src_addr
;
1070 ib
->sib_family
= AF_IB
;
1072 ib
->sib_pkey
= path
->pkey
;
1073 ib
->sib_flowinfo
= path
->flow_label
;
1074 memcpy(&ib
->sib_addr
, &path
->sgid
, 16);
1075 ib
->sib_sid
= path
->service_id
;
1076 ib
->sib_scope_id
= 0;
1078 ib
->sib_pkey
= listen_ib
->sib_pkey
;
1079 ib
->sib_flowinfo
= listen_ib
->sib_flowinfo
;
1080 ib
->sib_addr
= listen_ib
->sib_addr
;
1081 ib
->sib_sid
= listen_ib
->sib_sid
;
1082 ib
->sib_scope_id
= listen_ib
->sib_scope_id
;
1084 ib
->sib_sid_mask
= cpu_to_be64(0xffffffffffffffffULL
);
1087 ib
= (struct sockaddr_ib
*)dst_addr
;
1088 ib
->sib_family
= AF_IB
;
1090 ib
->sib_pkey
= path
->pkey
;
1091 ib
->sib_flowinfo
= path
->flow_label
;
1092 memcpy(&ib
->sib_addr
, &path
->dgid
, 16);
1097 static void cma_save_ip4_info(struct sockaddr
*src_addr
,
1098 struct sockaddr
*dst_addr
,
1099 struct cma_hdr
*hdr
,
1102 struct sockaddr_in
*ip4
;
1105 ip4
= (struct sockaddr_in
*)src_addr
;
1106 ip4
->sin_family
= AF_INET
;
1107 ip4
->sin_addr
.s_addr
= hdr
->dst_addr
.ip4
.addr
;
1108 ip4
->sin_port
= local_port
;
1112 ip4
= (struct sockaddr_in
*)dst_addr
;
1113 ip4
->sin_family
= AF_INET
;
1114 ip4
->sin_addr
.s_addr
= hdr
->src_addr
.ip4
.addr
;
1115 ip4
->sin_port
= hdr
->port
;
1119 static void cma_save_ip6_info(struct sockaddr
*src_addr
,
1120 struct sockaddr
*dst_addr
,
1121 struct cma_hdr
*hdr
,
1124 struct sockaddr_in6
*ip6
;
1127 ip6
= (struct sockaddr_in6
*)src_addr
;
1128 ip6
->sin6_family
= AF_INET6
;
1129 ip6
->sin6_addr
= hdr
->dst_addr
.ip6
;
1130 ip6
->sin6_port
= local_port
;
1134 ip6
= (struct sockaddr_in6
*)dst_addr
;
1135 ip6
->sin6_family
= AF_INET6
;
1136 ip6
->sin6_addr
= hdr
->src_addr
.ip6
;
1137 ip6
->sin6_port
= hdr
->port
;
1141 static u16
cma_port_from_service_id(__be64 service_id
)
1143 return (u16
)be64_to_cpu(service_id
);
1146 static int cma_save_ip_info(struct sockaddr
*src_addr
,
1147 struct sockaddr
*dst_addr
,
1148 struct ib_cm_event
*ib_event
,
1151 struct cma_hdr
*hdr
;
1154 hdr
= ib_event
->private_data
;
1155 if (hdr
->cma_version
!= CMA_VERSION
)
1158 port
= htons(cma_port_from_service_id(service_id
));
1160 switch (cma_get_ip_ver(hdr
)) {
1162 cma_save_ip4_info(src_addr
, dst_addr
, hdr
, port
);
1165 cma_save_ip6_info(src_addr
, dst_addr
, hdr
, port
);
1168 return -EAFNOSUPPORT
;
1174 static int cma_save_net_info(struct sockaddr
*src_addr
,
1175 struct sockaddr
*dst_addr
,
1176 struct rdma_cm_id
*listen_id
,
1177 struct ib_cm_event
*ib_event
,
1178 sa_family_t sa_family
, __be64 service_id
)
1180 if (sa_family
== AF_IB
) {
1181 if (ib_event
->event
== IB_CM_REQ_RECEIVED
)
1182 cma_save_ib_info(src_addr
, dst_addr
, listen_id
,
1183 ib_event
->param
.req_rcvd
.primary_path
);
1184 else if (ib_event
->event
== IB_CM_SIDR_REQ_RECEIVED
)
1185 cma_save_ib_info(src_addr
, dst_addr
, listen_id
, NULL
);
1189 return cma_save_ip_info(src_addr
, dst_addr
, ib_event
, service_id
);
1192 static int cma_save_req_info(const struct ib_cm_event
*ib_event
,
1193 struct cma_req_info
*req
)
1195 const struct ib_cm_req_event_param
*req_param
=
1196 &ib_event
->param
.req_rcvd
;
1197 const struct ib_cm_sidr_req_event_param
*sidr_param
=
1198 &ib_event
->param
.sidr_req_rcvd
;
1200 switch (ib_event
->event
) {
1201 case IB_CM_REQ_RECEIVED
:
1202 req
->device
= req_param
->listen_id
->device
;
1203 req
->port
= req_param
->port
;
1204 memcpy(&req
->local_gid
, &req_param
->primary_path
->sgid
,
1205 sizeof(req
->local_gid
));
1206 req
->has_gid
= true;
1207 req
->service_id
= req_param
->primary_path
->service_id
;
1208 req
->pkey
= be16_to_cpu(req_param
->primary_path
->pkey
);
1209 if (req
->pkey
!= req_param
->bth_pkey
)
1210 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1211 "RDMA CMA: in the future this may cause the request to be dropped\n",
1212 req_param
->bth_pkey
, req
->pkey
);
1214 case IB_CM_SIDR_REQ_RECEIVED
:
1215 req
->device
= sidr_param
->listen_id
->device
;
1216 req
->port
= sidr_param
->port
;
1217 req
->has_gid
= false;
1218 req
->service_id
= sidr_param
->service_id
;
1219 req
->pkey
= sidr_param
->pkey
;
1220 if (req
->pkey
!= sidr_param
->bth_pkey
)
1221 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1222 "RDMA CMA: in the future this may cause the request to be dropped\n",
1223 sidr_param
->bth_pkey
, req
->pkey
);
1232 static bool validate_ipv4_net_dev(struct net_device
*net_dev
,
1233 const struct sockaddr_in
*dst_addr
,
1234 const struct sockaddr_in
*src_addr
)
1236 __be32 daddr
= dst_addr
->sin_addr
.s_addr
,
1237 saddr
= src_addr
->sin_addr
.s_addr
;
1238 struct fib_result res
;
1243 if (ipv4_is_multicast(saddr
) || ipv4_is_lbcast(saddr
) ||
1244 ipv4_is_lbcast(daddr
) || ipv4_is_zeronet(saddr
) ||
1245 ipv4_is_zeronet(daddr
) || ipv4_is_loopback(daddr
) ||
1246 ipv4_is_loopback(saddr
))
1249 memset(&fl4
, 0, sizeof(fl4
));
1250 fl4
.flowi4_iif
= net_dev
->ifindex
;
1255 err
= fib_lookup(dev_net(net_dev
), &fl4
, &res
, 0);
1256 ret
= err
== 0 && FIB_RES_DEV(res
) == net_dev
;
1262 static bool validate_ipv6_net_dev(struct net_device
*net_dev
,
1263 const struct sockaddr_in6
*dst_addr
,
1264 const struct sockaddr_in6
*src_addr
)
1266 #if IS_ENABLED(CONFIG_IPV6)
1267 const int strict
= ipv6_addr_type(&dst_addr
->sin6_addr
) &
1268 IPV6_ADDR_LINKLOCAL
;
1269 struct rt6_info
*rt
= rt6_lookup(dev_net(net_dev
), &dst_addr
->sin6_addr
,
1270 &src_addr
->sin6_addr
, net_dev
->ifindex
,
1277 ret
= rt
->rt6i_idev
->dev
== net_dev
;
1286 static bool validate_net_dev(struct net_device
*net_dev
,
1287 const struct sockaddr
*daddr
,
1288 const struct sockaddr
*saddr
)
1290 const struct sockaddr_in
*daddr4
= (const struct sockaddr_in
*)daddr
;
1291 const struct sockaddr_in
*saddr4
= (const struct sockaddr_in
*)saddr
;
1292 const struct sockaddr_in6
*daddr6
= (const struct sockaddr_in6
*)daddr
;
1293 const struct sockaddr_in6
*saddr6
= (const struct sockaddr_in6
*)saddr
;
1295 switch (daddr
->sa_family
) {
1297 return saddr
->sa_family
== AF_INET
&&
1298 validate_ipv4_net_dev(net_dev
, daddr4
, saddr4
);
1301 return saddr
->sa_family
== AF_INET6
&&
1302 validate_ipv6_net_dev(net_dev
, daddr6
, saddr6
);
1309 static struct net_device
*cma_get_net_dev(struct ib_cm_event
*ib_event
,
1310 const struct cma_req_info
*req
)
1312 struct sockaddr_storage listen_addr_storage
, src_addr_storage
;
1313 struct sockaddr
*listen_addr
= (struct sockaddr
*)&listen_addr_storage
,
1314 *src_addr
= (struct sockaddr
*)&src_addr_storage
;
1315 struct net_device
*net_dev
;
1316 const union ib_gid
*gid
= req
->has_gid
? &req
->local_gid
: NULL
;
1319 err
= cma_save_ip_info(listen_addr
, src_addr
, ib_event
,
1322 return ERR_PTR(err
);
1324 net_dev
= ib_get_net_dev_by_params(req
->device
, req
->port
, req
->pkey
,
1327 return ERR_PTR(-ENODEV
);
1329 if (!validate_net_dev(net_dev
, listen_addr
, src_addr
)) {
1331 return ERR_PTR(-EHOSTUNREACH
);
1337 static enum rdma_port_space
rdma_ps_from_service_id(__be64 service_id
)
1339 return (be64_to_cpu(service_id
) >> 16) & 0xffff;
1342 static bool cma_match_private_data(struct rdma_id_private
*id_priv
,
1343 const struct cma_hdr
*hdr
)
1345 struct sockaddr
*addr
= cma_src_addr(id_priv
);
1347 struct in6_addr ip6_addr
;
1349 if (cma_any_addr(addr
) && !id_priv
->afonly
)
1352 switch (addr
->sa_family
) {
1354 ip4_addr
= ((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
;
1355 if (cma_get_ip_ver(hdr
) != 4)
1357 if (!cma_any_addr(addr
) &&
1358 hdr
->dst_addr
.ip4
.addr
!= ip4_addr
)
1362 ip6_addr
= ((struct sockaddr_in6
*)addr
)->sin6_addr
;
1363 if (cma_get_ip_ver(hdr
) != 6)
1365 if (!cma_any_addr(addr
) &&
1366 memcmp(&hdr
->dst_addr
.ip6
, &ip6_addr
, sizeof(ip6_addr
)))
1378 static bool cma_protocol_roce_dev_port(struct ib_device
*device
, int port_num
)
1380 enum rdma_link_layer ll
= rdma_port_get_link_layer(device
, port_num
);
1381 enum rdma_transport_type transport
=
1382 rdma_node_get_transport(device
->node_type
);
1384 return ll
== IB_LINK_LAYER_ETHERNET
&& transport
== RDMA_TRANSPORT_IB
;
1387 static bool cma_protocol_roce(const struct rdma_cm_id
*id
)
1389 struct ib_device
*device
= id
->device
;
1390 const int port_num
= id
->port_num
?: rdma_start_port(device
);
1392 return cma_protocol_roce_dev_port(device
, port_num
);
1395 static bool cma_match_net_dev(const struct rdma_cm_id
*id
,
1396 const struct net_device
*net_dev
,
1399 const struct rdma_addr
*addr
= &id
->route
.addr
;
1402 /* This request is an AF_IB request or a RoCE request */
1403 return (!id
->port_num
|| id
->port_num
== port_num
) &&
1404 (addr
->src_addr
.ss_family
== AF_IB
||
1405 cma_protocol_roce_dev_port(id
->device
, port_num
));
1407 return !addr
->dev_addr
.bound_dev_if
||
1408 (net_eq(dev_net(net_dev
), addr
->dev_addr
.net
) &&
1409 addr
->dev_addr
.bound_dev_if
== net_dev
->ifindex
);
1412 static struct rdma_id_private
*cma_find_listener(
1413 const struct rdma_bind_list
*bind_list
,
1414 const struct ib_cm_id
*cm_id
,
1415 const struct ib_cm_event
*ib_event
,
1416 const struct cma_req_info
*req
,
1417 const struct net_device
*net_dev
)
1419 struct rdma_id_private
*id_priv
, *id_priv_dev
;
1422 return ERR_PTR(-EINVAL
);
1424 hlist_for_each_entry(id_priv
, &bind_list
->owners
, node
) {
1425 if (cma_match_private_data(id_priv
, ib_event
->private_data
)) {
1426 if (id_priv
->id
.device
== cm_id
->device
&&
1427 cma_match_net_dev(&id_priv
->id
, net_dev
, req
->port
))
1429 list_for_each_entry(id_priv_dev
,
1430 &id_priv
->listen_list
,
1432 if (id_priv_dev
->id
.device
== cm_id
->device
&&
1433 cma_match_net_dev(&id_priv_dev
->id
, net_dev
, req
->port
))
1439 return ERR_PTR(-EINVAL
);
1442 static struct rdma_id_private
*cma_id_from_event(struct ib_cm_id
*cm_id
,
1443 struct ib_cm_event
*ib_event
,
1444 struct net_device
**net_dev
)
1446 struct cma_req_info req
;
1447 struct rdma_bind_list
*bind_list
;
1448 struct rdma_id_private
*id_priv
;
1451 err
= cma_save_req_info(ib_event
, &req
);
1453 return ERR_PTR(err
);
1455 *net_dev
= cma_get_net_dev(ib_event
, &req
);
1456 if (IS_ERR(*net_dev
)) {
1457 if (PTR_ERR(*net_dev
) == -EAFNOSUPPORT
) {
1458 /* Assuming the protocol is AF_IB */
1460 } else if (cma_protocol_roce_dev_port(req
.device
, req
.port
)) {
1461 /* TODO find the net dev matching the request parameters
1462 * through the RoCE GID table */
1465 return ERR_CAST(*net_dev
);
1469 bind_list
= cma_ps_find(*net_dev
? dev_net(*net_dev
) : &init_net
,
1470 rdma_ps_from_service_id(req
.service_id
),
1471 cma_port_from_service_id(req
.service_id
));
1472 id_priv
= cma_find_listener(bind_list
, cm_id
, ib_event
, &req
, *net_dev
);
1473 if (IS_ERR(id_priv
) && *net_dev
) {
1481 static inline int cma_user_data_offset(struct rdma_id_private
*id_priv
)
1483 return cma_family(id_priv
) == AF_IB
? 0 : sizeof(struct cma_hdr
);
1486 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
1488 if (rdma_cap_ib_sa(id_priv
->id
.device
, id_priv
->id
.port_num
)) {
1490 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
1494 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
1496 struct rdma_id_private
*dev_id_priv
;
1499 * Remove from listen_any_list to prevent added devices from spawning
1500 * additional listen requests.
1503 list_del(&id_priv
->list
);
1505 while (!list_empty(&id_priv
->listen_list
)) {
1506 dev_id_priv
= list_entry(id_priv
->listen_list
.next
,
1507 struct rdma_id_private
, listen_list
);
1508 /* sync with device removal to avoid duplicate destruction */
1509 list_del_init(&dev_id_priv
->list
);
1510 list_del(&dev_id_priv
->listen_list
);
1511 mutex_unlock(&lock
);
1513 rdma_destroy_id(&dev_id_priv
->id
);
1516 mutex_unlock(&lock
);
1519 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
1520 enum rdma_cm_state state
)
1523 case RDMA_CM_ADDR_QUERY
:
1524 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
1526 case RDMA_CM_ROUTE_QUERY
:
1527 cma_cancel_route(id_priv
);
1529 case RDMA_CM_LISTEN
:
1530 if (cma_any_addr(cma_src_addr(id_priv
)) && !id_priv
->cma_dev
)
1531 cma_cancel_listens(id_priv
);
1538 static void cma_release_port(struct rdma_id_private
*id_priv
)
1540 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
1541 struct net
*net
= id_priv
->id
.route
.addr
.dev_addr
.net
;
1547 hlist_del(&id_priv
->node
);
1548 if (hlist_empty(&bind_list
->owners
)) {
1549 cma_ps_remove(net
, bind_list
->ps
, bind_list
->port
);
1552 mutex_unlock(&lock
);
1555 static void cma_leave_mc_groups(struct rdma_id_private
*id_priv
)
1557 struct cma_multicast
*mc
;
1559 while (!list_empty(&id_priv
->mc_list
)) {
1560 mc
= container_of(id_priv
->mc_list
.next
,
1561 struct cma_multicast
, list
);
1562 list_del(&mc
->list
);
1563 if (rdma_cap_ib_mcast(id_priv
->cma_dev
->device
,
1564 id_priv
->id
.port_num
)) {
1565 ib_sa_free_multicast(mc
->multicast
.ib
);
1568 if (mc
->igmp_joined
) {
1569 struct rdma_dev_addr
*dev_addr
=
1570 &id_priv
->id
.route
.addr
.dev_addr
;
1571 struct net_device
*ndev
= NULL
;
1573 if (dev_addr
->bound_dev_if
)
1574 ndev
= dev_get_by_index(&init_net
,
1575 dev_addr
->bound_dev_if
);
1578 &mc
->multicast
.ib
->rec
.mgid
,
1583 kref_put(&mc
->mcref
, release_mc
);
1588 void rdma_destroy_id(struct rdma_cm_id
*id
)
1590 struct rdma_id_private
*id_priv
;
1591 enum rdma_cm_state state
;
1593 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1594 state
= cma_exch(id_priv
, RDMA_CM_DESTROYING
);
1595 cma_cancel_operation(id_priv
, state
);
1598 * Wait for any active callback to finish. New callbacks will find
1599 * the id_priv state set to destroying and abort.
1601 mutex_lock(&id_priv
->handler_mutex
);
1602 mutex_unlock(&id_priv
->handler_mutex
);
1604 if (id_priv
->cma_dev
) {
1605 if (rdma_cap_ib_cm(id_priv
->id
.device
, 1)) {
1606 if (id_priv
->cm_id
.ib
)
1607 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1608 } else if (rdma_cap_iw_cm(id_priv
->id
.device
, 1)) {
1609 if (id_priv
->cm_id
.iw
)
1610 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1612 cma_leave_mc_groups(id_priv
);
1613 cma_release_dev(id_priv
);
1616 cma_release_port(id_priv
);
1617 cma_deref_id(id_priv
);
1618 wait_for_completion(&id_priv
->comp
);
1620 if (id_priv
->internal_id
)
1621 cma_deref_id(id_priv
->id
.context
);
1623 kfree(id_priv
->id
.route
.path_rec
);
1624 put_net(id_priv
->id
.route
.addr
.dev_addr
.net
);
1627 EXPORT_SYMBOL(rdma_destroy_id
);
1629 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
1633 ret
= cma_modify_qp_rtr(id_priv
, NULL
);
1637 ret
= cma_modify_qp_rts(id_priv
, NULL
);
1641 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
1647 cma_modify_qp_err(id_priv
);
1648 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
1653 static void cma_set_rep_event_data(struct rdma_cm_event
*event
,
1654 struct ib_cm_rep_event_param
*rep_data
,
1657 event
->param
.conn
.private_data
= private_data
;
1658 event
->param
.conn
.private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
1659 event
->param
.conn
.responder_resources
= rep_data
->responder_resources
;
1660 event
->param
.conn
.initiator_depth
= rep_data
->initiator_depth
;
1661 event
->param
.conn
.flow_control
= rep_data
->flow_control
;
1662 event
->param
.conn
.rnr_retry_count
= rep_data
->rnr_retry_count
;
1663 event
->param
.conn
.srq
= rep_data
->srq
;
1664 event
->param
.conn
.qp_num
= rep_data
->remote_qpn
;
1667 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
1669 struct rdma_id_private
*id_priv
= cm_id
->context
;
1670 struct rdma_cm_event event
;
1673 mutex_lock(&id_priv
->handler_mutex
);
1674 if ((ib_event
->event
!= IB_CM_TIMEWAIT_EXIT
&&
1675 id_priv
->state
!= RDMA_CM_CONNECT
) ||
1676 (ib_event
->event
== IB_CM_TIMEWAIT_EXIT
&&
1677 id_priv
->state
!= RDMA_CM_DISCONNECT
))
1680 memset(&event
, 0, sizeof event
);
1681 switch (ib_event
->event
) {
1682 case IB_CM_REQ_ERROR
:
1683 case IB_CM_REP_ERROR
:
1684 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
1685 event
.status
= -ETIMEDOUT
;
1687 case IB_CM_REP_RECEIVED
:
1688 if (id_priv
->id
.qp
) {
1689 event
.status
= cma_rep_recv(id_priv
);
1690 event
.event
= event
.status
? RDMA_CM_EVENT_CONNECT_ERROR
:
1691 RDMA_CM_EVENT_ESTABLISHED
;
1693 event
.event
= RDMA_CM_EVENT_CONNECT_RESPONSE
;
1695 cma_set_rep_event_data(&event
, &ib_event
->param
.rep_rcvd
,
1696 ib_event
->private_data
);
1698 case IB_CM_RTU_RECEIVED
:
1699 case IB_CM_USER_ESTABLISHED
:
1700 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1702 case IB_CM_DREQ_ERROR
:
1703 event
.status
= -ETIMEDOUT
; /* fall through */
1704 case IB_CM_DREQ_RECEIVED
:
1705 case IB_CM_DREP_RECEIVED
:
1706 if (!cma_comp_exch(id_priv
, RDMA_CM_CONNECT
,
1707 RDMA_CM_DISCONNECT
))
1709 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
1711 case IB_CM_TIMEWAIT_EXIT
:
1712 event
.event
= RDMA_CM_EVENT_TIMEWAIT_EXIT
;
1714 case IB_CM_MRA_RECEIVED
:
1717 case IB_CM_REJ_RECEIVED
:
1718 cma_modify_qp_err(id_priv
);
1719 event
.status
= ib_event
->param
.rej_rcvd
.reason
;
1720 event
.event
= RDMA_CM_EVENT_REJECTED
;
1721 event
.param
.conn
.private_data
= ib_event
->private_data
;
1722 event
.param
.conn
.private_data_len
= IB_CM_REJ_PRIVATE_DATA_SIZE
;
1725 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1730 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
1732 /* Destroy the CM ID by returning a non-zero value. */
1733 id_priv
->cm_id
.ib
= NULL
;
1734 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
1735 mutex_unlock(&id_priv
->handler_mutex
);
1736 rdma_destroy_id(&id_priv
->id
);
1740 mutex_unlock(&id_priv
->handler_mutex
);
1744 static struct rdma_id_private
*cma_new_conn_id(struct rdma_cm_id
*listen_id
,
1745 struct ib_cm_event
*ib_event
,
1746 struct net_device
*net_dev
)
1748 struct rdma_id_private
*id_priv
;
1749 struct rdma_cm_id
*id
;
1750 struct rdma_route
*rt
;
1751 const sa_family_t ss_family
= listen_id
->route
.addr
.src_addr
.ss_family
;
1752 const __be64 service_id
=
1753 ib_event
->param
.req_rcvd
.primary_path
->service_id
;
1756 id
= rdma_create_id(listen_id
->route
.addr
.dev_addr
.net
,
1757 listen_id
->event_handler
, listen_id
->context
,
1758 listen_id
->ps
, ib_event
->param
.req_rcvd
.qp_type
);
1762 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1763 if (cma_save_net_info((struct sockaddr
*)&id
->route
.addr
.src_addr
,
1764 (struct sockaddr
*)&id
->route
.addr
.dst_addr
,
1765 listen_id
, ib_event
, ss_family
, service_id
))
1769 rt
->num_paths
= ib_event
->param
.req_rcvd
.alternate_path
? 2 : 1;
1770 rt
->path_rec
= kmalloc(sizeof *rt
->path_rec
* rt
->num_paths
,
1775 rt
->path_rec
[0] = *ib_event
->param
.req_rcvd
.primary_path
;
1776 if (rt
->num_paths
== 2)
1777 rt
->path_rec
[1] = *ib_event
->param
.req_rcvd
.alternate_path
;
1780 ret
= rdma_copy_addr(&rt
->addr
.dev_addr
, net_dev
, NULL
);
1784 if (!cma_protocol_roce(listen_id
) &&
1785 cma_any_addr(cma_src_addr(id_priv
))) {
1786 rt
->addr
.dev_addr
.dev_type
= ARPHRD_INFINIBAND
;
1787 rdma_addr_set_sgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].sgid
);
1788 ib_addr_set_pkey(&rt
->addr
.dev_addr
, be16_to_cpu(rt
->path_rec
[0].pkey
));
1789 } else if (!cma_any_addr(cma_src_addr(id_priv
))) {
1790 ret
= cma_translate_addr(cma_src_addr(id_priv
), &rt
->addr
.dev_addr
);
1795 rdma_addr_set_dgid(&rt
->addr
.dev_addr
, &rt
->path_rec
[0].dgid
);
1797 id_priv
->state
= RDMA_CM_CONNECT
;
1801 rdma_destroy_id(id
);
1805 static struct rdma_id_private
*cma_new_udp_id(struct rdma_cm_id
*listen_id
,
1806 struct ib_cm_event
*ib_event
,
1807 struct net_device
*net_dev
)
1809 struct rdma_id_private
*id_priv
;
1810 struct rdma_cm_id
*id
;
1811 const sa_family_t ss_family
= listen_id
->route
.addr
.src_addr
.ss_family
;
1812 struct net
*net
= listen_id
->route
.addr
.dev_addr
.net
;
1815 id
= rdma_create_id(net
, listen_id
->event_handler
, listen_id
->context
,
1816 listen_id
->ps
, IB_QPT_UD
);
1820 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1821 if (cma_save_net_info((struct sockaddr
*)&id
->route
.addr
.src_addr
,
1822 (struct sockaddr
*)&id
->route
.addr
.dst_addr
,
1823 listen_id
, ib_event
, ss_family
,
1824 ib_event
->param
.sidr_req_rcvd
.service_id
))
1828 ret
= rdma_copy_addr(&id
->route
.addr
.dev_addr
, net_dev
, NULL
);
1832 if (!cma_any_addr(cma_src_addr(id_priv
))) {
1833 ret
= cma_translate_addr(cma_src_addr(id_priv
),
1834 &id
->route
.addr
.dev_addr
);
1840 id_priv
->state
= RDMA_CM_CONNECT
;
1843 rdma_destroy_id(id
);
1847 static void cma_set_req_event_data(struct rdma_cm_event
*event
,
1848 struct ib_cm_req_event_param
*req_data
,
1849 void *private_data
, int offset
)
1851 event
->param
.conn
.private_data
= private_data
+ offset
;
1852 event
->param
.conn
.private_data_len
= IB_CM_REQ_PRIVATE_DATA_SIZE
- offset
;
1853 event
->param
.conn
.responder_resources
= req_data
->responder_resources
;
1854 event
->param
.conn
.initiator_depth
= req_data
->initiator_depth
;
1855 event
->param
.conn
.flow_control
= req_data
->flow_control
;
1856 event
->param
.conn
.retry_count
= req_data
->retry_count
;
1857 event
->param
.conn
.rnr_retry_count
= req_data
->rnr_retry_count
;
1858 event
->param
.conn
.srq
= req_data
->srq
;
1859 event
->param
.conn
.qp_num
= req_data
->remote_qpn
;
1862 static int cma_check_req_qp_type(struct rdma_cm_id
*id
, struct ib_cm_event
*ib_event
)
1864 return (((ib_event
->event
== IB_CM_REQ_RECEIVED
) &&
1865 (ib_event
->param
.req_rcvd
.qp_type
== id
->qp_type
)) ||
1866 ((ib_event
->event
== IB_CM_SIDR_REQ_RECEIVED
) &&
1867 (id
->qp_type
== IB_QPT_UD
)) ||
1871 static int cma_req_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
1873 struct rdma_id_private
*listen_id
, *conn_id
= NULL
;
1874 struct rdma_cm_event event
;
1875 struct net_device
*net_dev
;
1878 listen_id
= cma_id_from_event(cm_id
, ib_event
, &net_dev
);
1879 if (IS_ERR(listen_id
))
1880 return PTR_ERR(listen_id
);
1882 if (!cma_check_req_qp_type(&listen_id
->id
, ib_event
)) {
1887 mutex_lock(&listen_id
->handler_mutex
);
1888 if (listen_id
->state
!= RDMA_CM_LISTEN
) {
1889 ret
= -ECONNABORTED
;
1893 memset(&event
, 0, sizeof event
);
1894 offset
= cma_user_data_offset(listen_id
);
1895 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1896 if (ib_event
->event
== IB_CM_SIDR_REQ_RECEIVED
) {
1897 conn_id
= cma_new_udp_id(&listen_id
->id
, ib_event
, net_dev
);
1898 event
.param
.ud
.private_data
= ib_event
->private_data
+ offset
;
1899 event
.param
.ud
.private_data_len
=
1900 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
- offset
;
1902 conn_id
= cma_new_conn_id(&listen_id
->id
, ib_event
, net_dev
);
1903 cma_set_req_event_data(&event
, &ib_event
->param
.req_rcvd
,
1904 ib_event
->private_data
, offset
);
1911 mutex_lock_nested(&conn_id
->handler_mutex
, SINGLE_DEPTH_NESTING
);
1912 ret
= cma_acquire_dev(conn_id
, listen_id
);
1916 conn_id
->cm_id
.ib
= cm_id
;
1917 cm_id
->context
= conn_id
;
1918 cm_id
->cm_handler
= cma_ib_handler
;
1921 * Protect against the user destroying conn_id from another thread
1922 * until we're done accessing it.
1924 atomic_inc(&conn_id
->refcount
);
1925 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1929 * Acquire mutex to prevent user executing rdma_destroy_id()
1930 * while we're accessing the cm_id.
1933 if (cma_comp(conn_id
, RDMA_CM_CONNECT
) &&
1934 (conn_id
->id
.qp_type
!= IB_QPT_UD
))
1935 ib_send_cm_mra(cm_id
, CMA_CM_MRA_SETTING
, NULL
, 0);
1936 mutex_unlock(&lock
);
1937 mutex_unlock(&conn_id
->handler_mutex
);
1938 mutex_unlock(&listen_id
->handler_mutex
);
1939 cma_deref_id(conn_id
);
1945 cma_deref_id(conn_id
);
1946 /* Destroy the CM ID by returning a non-zero value. */
1947 conn_id
->cm_id
.ib
= NULL
;
1949 cma_exch(conn_id
, RDMA_CM_DESTROYING
);
1950 mutex_unlock(&conn_id
->handler_mutex
);
1952 mutex_unlock(&listen_id
->handler_mutex
);
1954 rdma_destroy_id(&conn_id
->id
);
1963 __be64
rdma_get_service_id(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
1965 if (addr
->sa_family
== AF_IB
)
1966 return ((struct sockaddr_ib
*) addr
)->sib_sid
;
1968 return cpu_to_be64(((u64
)id
->ps
<< 16) + be16_to_cpu(cma_port(addr
)));
1970 EXPORT_SYMBOL(rdma_get_service_id
);
1972 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1974 struct rdma_id_private
*id_priv
= iw_id
->context
;
1975 struct rdma_cm_event event
;
1977 struct sockaddr
*laddr
= (struct sockaddr
*)&iw_event
->local_addr
;
1978 struct sockaddr
*raddr
= (struct sockaddr
*)&iw_event
->remote_addr
;
1980 mutex_lock(&id_priv
->handler_mutex
);
1981 if (id_priv
->state
!= RDMA_CM_CONNECT
)
1984 memset(&event
, 0, sizeof event
);
1985 switch (iw_event
->event
) {
1986 case IW_CM_EVENT_CLOSE
:
1987 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
1989 case IW_CM_EVENT_CONNECT_REPLY
:
1990 memcpy(cma_src_addr(id_priv
), laddr
,
1991 rdma_addr_size(laddr
));
1992 memcpy(cma_dst_addr(id_priv
), raddr
,
1993 rdma_addr_size(raddr
));
1994 switch (iw_event
->status
) {
1996 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1997 event
.param
.conn
.initiator_depth
= iw_event
->ird
;
1998 event
.param
.conn
.responder_resources
= iw_event
->ord
;
2002 event
.event
= RDMA_CM_EVENT_REJECTED
;
2005 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2008 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
2012 case IW_CM_EVENT_ESTABLISHED
:
2013 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
2014 event
.param
.conn
.initiator_depth
= iw_event
->ird
;
2015 event
.param
.conn
.responder_resources
= iw_event
->ord
;
2021 event
.status
= iw_event
->status
;
2022 event
.param
.conn
.private_data
= iw_event
->private_data
;
2023 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
2024 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2026 /* Destroy the CM ID by returning a non-zero value. */
2027 id_priv
->cm_id
.iw
= NULL
;
2028 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
2029 mutex_unlock(&id_priv
->handler_mutex
);
2030 rdma_destroy_id(&id_priv
->id
);
2035 mutex_unlock(&id_priv
->handler_mutex
);
2039 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
2040 struct iw_cm_event
*iw_event
)
2042 struct rdma_cm_id
*new_cm_id
;
2043 struct rdma_id_private
*listen_id
, *conn_id
;
2044 struct rdma_cm_event event
;
2045 int ret
= -ECONNABORTED
;
2046 struct sockaddr
*laddr
= (struct sockaddr
*)&iw_event
->local_addr
;
2047 struct sockaddr
*raddr
= (struct sockaddr
*)&iw_event
->remote_addr
;
2049 listen_id
= cm_id
->context
;
2051 mutex_lock(&listen_id
->handler_mutex
);
2052 if (listen_id
->state
!= RDMA_CM_LISTEN
)
2055 /* Create a new RDMA id for the new IW CM ID */
2056 new_cm_id
= rdma_create_id(listen_id
->id
.route
.addr
.dev_addr
.net
,
2057 listen_id
->id
.event_handler
,
2058 listen_id
->id
.context
,
2059 RDMA_PS_TCP
, IB_QPT_RC
);
2060 if (IS_ERR(new_cm_id
)) {
2064 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
2065 mutex_lock_nested(&conn_id
->handler_mutex
, SINGLE_DEPTH_NESTING
);
2066 conn_id
->state
= RDMA_CM_CONNECT
;
2068 ret
= rdma_translate_ip(laddr
, &conn_id
->id
.route
.addr
.dev_addr
, NULL
);
2070 mutex_unlock(&conn_id
->handler_mutex
);
2071 rdma_destroy_id(new_cm_id
);
2075 ret
= cma_acquire_dev(conn_id
, listen_id
);
2077 mutex_unlock(&conn_id
->handler_mutex
);
2078 rdma_destroy_id(new_cm_id
);
2082 conn_id
->cm_id
.iw
= cm_id
;
2083 cm_id
->context
= conn_id
;
2084 cm_id
->cm_handler
= cma_iw_handler
;
2086 memcpy(cma_src_addr(conn_id
), laddr
, rdma_addr_size(laddr
));
2087 memcpy(cma_dst_addr(conn_id
), raddr
, rdma_addr_size(raddr
));
2089 memset(&event
, 0, sizeof event
);
2090 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
2091 event
.param
.conn
.private_data
= iw_event
->private_data
;
2092 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
2093 event
.param
.conn
.initiator_depth
= iw_event
->ird
;
2094 event
.param
.conn
.responder_resources
= iw_event
->ord
;
2097 * Protect against the user destroying conn_id from another thread
2098 * until we're done accessing it.
2100 atomic_inc(&conn_id
->refcount
);
2101 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
2103 /* User wants to destroy the CM ID */
2104 conn_id
->cm_id
.iw
= NULL
;
2105 cma_exch(conn_id
, RDMA_CM_DESTROYING
);
2106 mutex_unlock(&conn_id
->handler_mutex
);
2107 cma_deref_id(conn_id
);
2108 rdma_destroy_id(&conn_id
->id
);
2112 mutex_unlock(&conn_id
->handler_mutex
);
2113 cma_deref_id(conn_id
);
2116 mutex_unlock(&listen_id
->handler_mutex
);
2120 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
2122 struct sockaddr
*addr
;
2123 struct ib_cm_id
*id
;
2126 addr
= cma_src_addr(id_priv
);
2127 svc_id
= rdma_get_service_id(&id_priv
->id
, addr
);
2128 id
= ib_cm_insert_listen(id_priv
->id
.device
, cma_req_handler
, svc_id
);
2131 id_priv
->cm_id
.ib
= id
;
2136 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
2139 struct iw_cm_id
*id
;
2141 id
= iw_create_cm_id(id_priv
->id
.device
,
2142 iw_conn_req_handler
,
2147 id
->tos
= id_priv
->tos
;
2148 id_priv
->cm_id
.iw
= id
;
2150 memcpy(&id_priv
->cm_id
.iw
->local_addr
, cma_src_addr(id_priv
),
2151 rdma_addr_size(cma_src_addr(id_priv
)));
2153 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
2156 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
2157 id_priv
->cm_id
.iw
= NULL
;
2163 static int cma_listen_handler(struct rdma_cm_id
*id
,
2164 struct rdma_cm_event
*event
)
2166 struct rdma_id_private
*id_priv
= id
->context
;
2168 id
->context
= id_priv
->id
.context
;
2169 id
->event_handler
= id_priv
->id
.event_handler
;
2170 return id_priv
->id
.event_handler(id
, event
);
2173 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
2174 struct cma_device
*cma_dev
)
2176 struct rdma_id_private
*dev_id_priv
;
2177 struct rdma_cm_id
*id
;
2178 struct net
*net
= id_priv
->id
.route
.addr
.dev_addr
.net
;
2181 if (cma_family(id_priv
) == AF_IB
&& !rdma_cap_ib_cm(cma_dev
->device
, 1))
2184 id
= rdma_create_id(net
, cma_listen_handler
, id_priv
, id_priv
->id
.ps
,
2185 id_priv
->id
.qp_type
);
2189 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
2191 dev_id_priv
->state
= RDMA_CM_ADDR_BOUND
;
2192 memcpy(cma_src_addr(dev_id_priv
), cma_src_addr(id_priv
),
2193 rdma_addr_size(cma_src_addr(id_priv
)));
2195 _cma_attach_to_dev(dev_id_priv
, cma_dev
);
2196 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
2197 atomic_inc(&id_priv
->refcount
);
2198 dev_id_priv
->internal_id
= 1;
2199 dev_id_priv
->afonly
= id_priv
->afonly
;
2201 ret
= rdma_listen(id
, id_priv
->backlog
);
2203 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2204 ret
, cma_dev
->device
->name
);
2207 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
2209 struct cma_device
*cma_dev
;
2212 list_add_tail(&id_priv
->list
, &listen_any_list
);
2213 list_for_each_entry(cma_dev
, &dev_list
, list
)
2214 cma_listen_on_dev(id_priv
, cma_dev
);
2215 mutex_unlock(&lock
);
2218 void rdma_set_service_type(struct rdma_cm_id
*id
, int tos
)
2220 struct rdma_id_private
*id_priv
;
2222 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2223 id_priv
->tos
= (u8
) tos
;
2225 EXPORT_SYMBOL(rdma_set_service_type
);
2227 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
2230 struct cma_work
*work
= context
;
2231 struct rdma_route
*route
;
2233 route
= &work
->id
->id
.route
;
2236 route
->num_paths
= 1;
2237 *route
->path_rec
= *path_rec
;
2239 work
->old_state
= RDMA_CM_ROUTE_QUERY
;
2240 work
->new_state
= RDMA_CM_ADDR_RESOLVED
;
2241 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
2242 work
->event
.status
= status
;
2245 queue_work(cma_wq
, &work
->work
);
2248 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
2249 struct cma_work
*work
)
2251 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2252 struct ib_sa_path_rec path_rec
;
2253 ib_sa_comp_mask comp_mask
;
2254 struct sockaddr_in6
*sin6
;
2255 struct sockaddr_ib
*sib
;
2257 memset(&path_rec
, 0, sizeof path_rec
);
2258 rdma_addr_get_sgid(dev_addr
, &path_rec
.sgid
);
2259 rdma_addr_get_dgid(dev_addr
, &path_rec
.dgid
);
2260 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(dev_addr
));
2261 path_rec
.numb_path
= 1;
2262 path_rec
.reversible
= 1;
2263 path_rec
.service_id
= rdma_get_service_id(&id_priv
->id
, cma_dst_addr(id_priv
));
2265 comp_mask
= IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
2266 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
|
2267 IB_SA_PATH_REC_REVERSIBLE
| IB_SA_PATH_REC_SERVICE_ID
;
2269 switch (cma_family(id_priv
)) {
2271 path_rec
.qos_class
= cpu_to_be16((u16
) id_priv
->tos
);
2272 comp_mask
|= IB_SA_PATH_REC_QOS_CLASS
;
2275 sin6
= (struct sockaddr_in6
*) cma_src_addr(id_priv
);
2276 path_rec
.traffic_class
= (u8
) (be32_to_cpu(sin6
->sin6_flowinfo
) >> 20);
2277 comp_mask
|= IB_SA_PATH_REC_TRAFFIC_CLASS
;
2280 sib
= (struct sockaddr_ib
*) cma_src_addr(id_priv
);
2281 path_rec
.traffic_class
= (u8
) (be32_to_cpu(sib
->sib_flowinfo
) >> 20);
2282 comp_mask
|= IB_SA_PATH_REC_TRAFFIC_CLASS
;
2286 id_priv
->query_id
= ib_sa_path_rec_get(&sa_client
, id_priv
->id
.device
,
2287 id_priv
->id
.port_num
, &path_rec
,
2288 comp_mask
, timeout_ms
,
2289 GFP_KERNEL
, cma_query_handler
,
2290 work
, &id_priv
->query
);
2292 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
2295 static void cma_work_handler(struct work_struct
*_work
)
2297 struct cma_work
*work
= container_of(_work
, struct cma_work
, work
);
2298 struct rdma_id_private
*id_priv
= work
->id
;
2301 mutex_lock(&id_priv
->handler_mutex
);
2302 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
2305 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
2306 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
2310 mutex_unlock(&id_priv
->handler_mutex
);
2311 cma_deref_id(id_priv
);
2313 rdma_destroy_id(&id_priv
->id
);
2317 static void cma_ndev_work_handler(struct work_struct
*_work
)
2319 struct cma_ndev_work
*work
= container_of(_work
, struct cma_ndev_work
, work
);
2320 struct rdma_id_private
*id_priv
= work
->id
;
2323 mutex_lock(&id_priv
->handler_mutex
);
2324 if (id_priv
->state
== RDMA_CM_DESTROYING
||
2325 id_priv
->state
== RDMA_CM_DEVICE_REMOVAL
)
2328 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
2329 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
2334 mutex_unlock(&id_priv
->handler_mutex
);
2335 cma_deref_id(id_priv
);
2337 rdma_destroy_id(&id_priv
->id
);
2341 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
2343 struct rdma_route
*route
= &id_priv
->id
.route
;
2344 struct cma_work
*work
;
2347 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2352 INIT_WORK(&work
->work
, cma_work_handler
);
2353 work
->old_state
= RDMA_CM_ROUTE_QUERY
;
2354 work
->new_state
= RDMA_CM_ROUTE_RESOLVED
;
2355 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
2357 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
2358 if (!route
->path_rec
) {
2363 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
2369 kfree(route
->path_rec
);
2370 route
->path_rec
= NULL
;
2376 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
2377 struct ib_sa_path_rec
*path_rec
, int num_paths
)
2379 struct rdma_id_private
*id_priv
;
2382 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2383 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_RESOLVED
,
2384 RDMA_CM_ROUTE_RESOLVED
))
2387 id
->route
.path_rec
= kmemdup(path_rec
, sizeof *path_rec
* num_paths
,
2389 if (!id
->route
.path_rec
) {
2394 id
->route
.num_paths
= num_paths
;
2397 cma_comp_exch(id_priv
, RDMA_CM_ROUTE_RESOLVED
, RDMA_CM_ADDR_RESOLVED
);
2400 EXPORT_SYMBOL(rdma_set_ib_paths
);
2402 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
2404 struct cma_work
*work
;
2406 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2411 INIT_WORK(&work
->work
, cma_work_handler
);
2412 work
->old_state
= RDMA_CM_ROUTE_QUERY
;
2413 work
->new_state
= RDMA_CM_ROUTE_RESOLVED
;
2414 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
2415 queue_work(cma_wq
, &work
->work
);
2419 static int iboe_tos_to_sl(struct net_device
*ndev
, int tos
)
2422 struct net_device
*dev
;
2424 prio
= rt_tos2priority(tos
);
2425 dev
= ndev
->priv_flags
& IFF_802_1Q_VLAN
?
2426 vlan_dev_real_dev(ndev
) : ndev
;
2429 return netdev_get_prio_tc_map(dev
, prio
);
2431 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2432 if (ndev
->priv_flags
& IFF_802_1Q_VLAN
)
2433 return (vlan_dev_get_egress_qos_mask(ndev
, prio
) &
2434 VLAN_PRIO_MASK
) >> VLAN_PRIO_SHIFT
;
2439 static int cma_resolve_iboe_route(struct rdma_id_private
*id_priv
)
2441 struct rdma_route
*route
= &id_priv
->id
.route
;
2442 struct rdma_addr
*addr
= &route
->addr
;
2443 struct cma_work
*work
;
2445 struct net_device
*ndev
= NULL
;
2448 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2453 INIT_WORK(&work
->work
, cma_work_handler
);
2455 route
->path_rec
= kzalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
2456 if (!route
->path_rec
) {
2461 route
->num_paths
= 1;
2463 if (addr
->dev_addr
.bound_dev_if
) {
2464 ndev
= dev_get_by_index(&init_net
, addr
->dev_addr
.bound_dev_if
);
2468 if (ndev
->flags
& IFF_LOOPBACK
) {
2470 if (!id_priv
->id
.device
->get_netdev
)
2473 ndev
= id_priv
->id
.device
->get_netdev(id_priv
->id
.device
,
2474 id_priv
->id
.port_num
);
2479 route
->path_rec
->net
= &init_net
;
2480 route
->path_rec
->ifindex
= ndev
->ifindex
;
2481 route
->path_rec
->gid_type
= id_priv
->gid_type
;
2488 memcpy(route
->path_rec
->dmac
, addr
->dev_addr
.dst_dev_addr
, ETH_ALEN
);
2490 rdma_ip2gid((struct sockaddr
*)&id_priv
->id
.route
.addr
.src_addr
,
2491 &route
->path_rec
->sgid
);
2492 rdma_ip2gid((struct sockaddr
*)&id_priv
->id
.route
.addr
.dst_addr
,
2493 &route
->path_rec
->dgid
);
2495 /* Use the hint from IP Stack to select GID Type */
2496 if (route
->path_rec
->gid_type
< ib_network_to_gid_type(addr
->dev_addr
.network
))
2497 route
->path_rec
->gid_type
= ib_network_to_gid_type(addr
->dev_addr
.network
);
2498 if (((struct sockaddr
*)&id_priv
->id
.route
.addr
.dst_addr
)->sa_family
!= AF_IB
)
2499 /* TODO: get the hoplimit from the inet/inet6 device */
2500 route
->path_rec
->hop_limit
= addr
->dev_addr
.hoplimit
;
2502 route
->path_rec
->hop_limit
= 1;
2503 route
->path_rec
->reversible
= 1;
2504 route
->path_rec
->pkey
= cpu_to_be16(0xffff);
2505 route
->path_rec
->mtu_selector
= IB_SA_EQ
;
2506 route
->path_rec
->sl
= iboe_tos_to_sl(ndev
, id_priv
->tos
);
2507 route
->path_rec
->mtu
= iboe_get_mtu(ndev
->mtu
);
2508 route
->path_rec
->rate_selector
= IB_SA_EQ
;
2509 route
->path_rec
->rate
= iboe_get_rate(ndev
);
2511 route
->path_rec
->packet_life_time_selector
= IB_SA_EQ
;
2512 route
->path_rec
->packet_life_time
= CMA_IBOE_PACKET_LIFETIME
;
2513 if (!route
->path_rec
->mtu
) {
2518 work
->old_state
= RDMA_CM_ROUTE_QUERY
;
2519 work
->new_state
= RDMA_CM_ROUTE_RESOLVED
;
2520 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
2521 work
->event
.status
= 0;
2523 queue_work(cma_wq
, &work
->work
);
2528 kfree(route
->path_rec
);
2529 route
->path_rec
= NULL
;
2535 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
2537 struct rdma_id_private
*id_priv
;
2540 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2541 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_RESOLVED
, RDMA_CM_ROUTE_QUERY
))
2544 atomic_inc(&id_priv
->refcount
);
2545 if (rdma_cap_ib_sa(id
->device
, id
->port_num
))
2546 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
2547 else if (rdma_protocol_roce(id
->device
, id
->port_num
))
2548 ret
= cma_resolve_iboe_route(id_priv
);
2549 else if (rdma_protocol_iwarp(id
->device
, id
->port_num
))
2550 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
2559 cma_comp_exch(id_priv
, RDMA_CM_ROUTE_QUERY
, RDMA_CM_ADDR_RESOLVED
);
2560 cma_deref_id(id_priv
);
2563 EXPORT_SYMBOL(rdma_resolve_route
);
2565 static void cma_set_loopback(struct sockaddr
*addr
)
2567 switch (addr
->sa_family
) {
2569 ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
2572 ipv6_addr_set(&((struct sockaddr_in6
*) addr
)->sin6_addr
,
2576 ib_addr_set(&((struct sockaddr_ib
*) addr
)->sib_addr
,
2582 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
2584 struct cma_device
*cma_dev
, *cur_dev
;
2585 struct ib_port_attr port_attr
;
2593 list_for_each_entry(cur_dev
, &dev_list
, list
) {
2594 if (cma_family(id_priv
) == AF_IB
&&
2595 !rdma_cap_ib_cm(cur_dev
->device
, 1))
2601 for (p
= 1; p
<= cur_dev
->device
->phys_port_cnt
; ++p
) {
2602 if (!ib_query_port(cur_dev
->device
, p
, &port_attr
) &&
2603 port_attr
.state
== IB_PORT_ACTIVE
) {
2618 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
, NULL
);
2622 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
2626 id_priv
->id
.route
.addr
.dev_addr
.dev_type
=
2627 (rdma_protocol_ib(cma_dev
->device
, p
)) ?
2628 ARPHRD_INFINIBAND
: ARPHRD_ETHER
;
2630 rdma_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
2631 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
2632 id_priv
->id
.port_num
= p
;
2633 cma_attach_to_dev(id_priv
, cma_dev
);
2634 cma_set_loopback(cma_src_addr(id_priv
));
2636 mutex_unlock(&lock
);
2640 static void addr_handler(int status
, struct sockaddr
*src_addr
,
2641 struct rdma_dev_addr
*dev_addr
, void *context
)
2643 struct rdma_id_private
*id_priv
= context
;
2644 struct rdma_cm_event event
;
2646 memset(&event
, 0, sizeof event
);
2647 mutex_lock(&id_priv
->handler_mutex
);
2648 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_QUERY
,
2649 RDMA_CM_ADDR_RESOLVED
))
2652 memcpy(cma_src_addr(id_priv
), src_addr
, rdma_addr_size(src_addr
));
2653 if (!status
&& !id_priv
->cma_dev
)
2654 status
= cma_acquire_dev(id_priv
, NULL
);
2657 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_RESOLVED
,
2658 RDMA_CM_ADDR_BOUND
))
2660 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
2661 event
.status
= status
;
2663 event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
2665 if (id_priv
->id
.event_handler(&id_priv
->id
, &event
)) {
2666 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
2667 mutex_unlock(&id_priv
->handler_mutex
);
2668 cma_deref_id(id_priv
);
2669 rdma_destroy_id(&id_priv
->id
);
2673 mutex_unlock(&id_priv
->handler_mutex
);
2674 cma_deref_id(id_priv
);
2677 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
2679 struct cma_work
*work
;
2683 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2687 if (!id_priv
->cma_dev
) {
2688 ret
= cma_bind_loopback(id_priv
);
2693 rdma_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
2694 rdma_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
2697 INIT_WORK(&work
->work
, cma_work_handler
);
2698 work
->old_state
= RDMA_CM_ADDR_QUERY
;
2699 work
->new_state
= RDMA_CM_ADDR_RESOLVED
;
2700 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
2701 queue_work(cma_wq
, &work
->work
);
2708 static int cma_resolve_ib_addr(struct rdma_id_private
*id_priv
)
2710 struct cma_work
*work
;
2713 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2717 if (!id_priv
->cma_dev
) {
2718 ret
= cma_resolve_ib_dev(id_priv
);
2723 rdma_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, (union ib_gid
*)
2724 &(((struct sockaddr_ib
*) &id_priv
->id
.route
.addr
.dst_addr
)->sib_addr
));
2727 INIT_WORK(&work
->work
, cma_work_handler
);
2728 work
->old_state
= RDMA_CM_ADDR_QUERY
;
2729 work
->new_state
= RDMA_CM_ADDR_RESOLVED
;
2730 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
2731 queue_work(cma_wq
, &work
->work
);
2738 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
2739 struct sockaddr
*dst_addr
)
2741 if (!src_addr
|| !src_addr
->sa_family
) {
2742 src_addr
= (struct sockaddr
*) &id
->route
.addr
.src_addr
;
2743 src_addr
->sa_family
= dst_addr
->sa_family
;
2744 if (dst_addr
->sa_family
== AF_INET6
) {
2745 struct sockaddr_in6
*src_addr6
= (struct sockaddr_in6
*) src_addr
;
2746 struct sockaddr_in6
*dst_addr6
= (struct sockaddr_in6
*) dst_addr
;
2747 src_addr6
->sin6_scope_id
= dst_addr6
->sin6_scope_id
;
2748 if (ipv6_addr_type(&dst_addr6
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
2749 id
->route
.addr
.dev_addr
.bound_dev_if
= dst_addr6
->sin6_scope_id
;
2750 } else if (dst_addr
->sa_family
== AF_IB
) {
2751 ((struct sockaddr_ib
*) src_addr
)->sib_pkey
=
2752 ((struct sockaddr_ib
*) dst_addr
)->sib_pkey
;
2755 return rdma_bind_addr(id
, src_addr
);
2758 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
2759 struct sockaddr
*dst_addr
, int timeout_ms
)
2761 struct rdma_id_private
*id_priv
;
2764 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2765 if (id_priv
->state
== RDMA_CM_IDLE
) {
2766 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
2771 if (cma_family(id_priv
) != dst_addr
->sa_family
)
2774 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_BOUND
, RDMA_CM_ADDR_QUERY
))
2777 atomic_inc(&id_priv
->refcount
);
2778 memcpy(cma_dst_addr(id_priv
), dst_addr
, rdma_addr_size(dst_addr
));
2779 if (cma_any_addr(dst_addr
)) {
2780 ret
= cma_resolve_loopback(id_priv
);
2782 if (dst_addr
->sa_family
== AF_IB
) {
2783 ret
= cma_resolve_ib_addr(id_priv
);
2785 ret
= rdma_resolve_ip(&addr_client
, cma_src_addr(id_priv
),
2786 dst_addr
, &id
->route
.addr
.dev_addr
,
2787 timeout_ms
, addr_handler
, id_priv
);
2795 cma_comp_exch(id_priv
, RDMA_CM_ADDR_QUERY
, RDMA_CM_ADDR_BOUND
);
2796 cma_deref_id(id_priv
);
2799 EXPORT_SYMBOL(rdma_resolve_addr
);
2801 int rdma_set_reuseaddr(struct rdma_cm_id
*id
, int reuse
)
2803 struct rdma_id_private
*id_priv
;
2804 unsigned long flags
;
2807 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2808 spin_lock_irqsave(&id_priv
->lock
, flags
);
2809 if (reuse
|| id_priv
->state
== RDMA_CM_IDLE
) {
2810 id_priv
->reuseaddr
= reuse
;
2815 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
2818 EXPORT_SYMBOL(rdma_set_reuseaddr
);
2820 int rdma_set_afonly(struct rdma_cm_id
*id
, int afonly
)
2822 struct rdma_id_private
*id_priv
;
2823 unsigned long flags
;
2826 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2827 spin_lock_irqsave(&id_priv
->lock
, flags
);
2828 if (id_priv
->state
== RDMA_CM_IDLE
|| id_priv
->state
== RDMA_CM_ADDR_BOUND
) {
2829 id_priv
->options
|= (1 << CMA_OPTION_AFONLY
);
2830 id_priv
->afonly
= afonly
;
2835 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
2838 EXPORT_SYMBOL(rdma_set_afonly
);
2840 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
2841 struct rdma_id_private
*id_priv
)
2843 struct sockaddr
*addr
;
2844 struct sockaddr_ib
*sib
;
2848 addr
= cma_src_addr(id_priv
);
2849 port
= htons(bind_list
->port
);
2851 switch (addr
->sa_family
) {
2853 ((struct sockaddr_in
*) addr
)->sin_port
= port
;
2856 ((struct sockaddr_in6
*) addr
)->sin6_port
= port
;
2859 sib
= (struct sockaddr_ib
*) addr
;
2860 sid
= be64_to_cpu(sib
->sib_sid
);
2861 mask
= be64_to_cpu(sib
->sib_sid_mask
);
2862 sib
->sib_sid
= cpu_to_be64((sid
& mask
) | (u64
) ntohs(port
));
2863 sib
->sib_sid_mask
= cpu_to_be64(~0ULL);
2866 id_priv
->bind_list
= bind_list
;
2867 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
2870 static int cma_alloc_port(enum rdma_port_space ps
,
2871 struct rdma_id_private
*id_priv
, unsigned short snum
)
2873 struct rdma_bind_list
*bind_list
;
2876 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
2880 ret
= cma_ps_alloc(id_priv
->id
.route
.addr
.dev_addr
.net
, ps
, bind_list
,
2886 bind_list
->port
= (unsigned short)ret
;
2887 cma_bind_port(bind_list
, id_priv
);
2891 return ret
== -ENOSPC
? -EADDRNOTAVAIL
: ret
;
2894 static int cma_alloc_any_port(enum rdma_port_space ps
,
2895 struct rdma_id_private
*id_priv
)
2897 static unsigned int last_used_port
;
2898 int low
, high
, remaining
;
2900 struct net
*net
= id_priv
->id
.route
.addr
.dev_addr
.net
;
2902 inet_get_local_port_range(net
, &low
, &high
);
2903 remaining
= (high
- low
) + 1;
2904 rover
= prandom_u32() % remaining
+ low
;
2906 if (last_used_port
!= rover
&&
2907 !cma_ps_find(net
, ps
, (unsigned short)rover
)) {
2908 int ret
= cma_alloc_port(ps
, id_priv
, rover
);
2910 * Remember previously used port number in order to avoid
2911 * re-using same port immediately after it is closed.
2914 last_used_port
= rover
;
2915 if (ret
!= -EADDRNOTAVAIL
)
2920 if ((rover
< low
) || (rover
> high
))
2924 return -EADDRNOTAVAIL
;
2928 * Check that the requested port is available. This is called when trying to
2929 * bind to a specific port, or when trying to listen on a bound port. In
2930 * the latter case, the provided id_priv may already be on the bind_list, but
2931 * we still need to check that it's okay to start listening.
2933 static int cma_check_port(struct rdma_bind_list
*bind_list
,
2934 struct rdma_id_private
*id_priv
, uint8_t reuseaddr
)
2936 struct rdma_id_private
*cur_id
;
2937 struct sockaddr
*addr
, *cur_addr
;
2939 addr
= cma_src_addr(id_priv
);
2940 hlist_for_each_entry(cur_id
, &bind_list
->owners
, node
) {
2941 if (id_priv
== cur_id
)
2944 if ((cur_id
->state
!= RDMA_CM_LISTEN
) && reuseaddr
&&
2948 cur_addr
= cma_src_addr(cur_id
);
2949 if (id_priv
->afonly
&& cur_id
->afonly
&&
2950 (addr
->sa_family
!= cur_addr
->sa_family
))
2953 if (cma_any_addr(addr
) || cma_any_addr(cur_addr
))
2954 return -EADDRNOTAVAIL
;
2956 if (!cma_addr_cmp(addr
, cur_addr
))
2962 static int cma_use_port(enum rdma_port_space ps
,
2963 struct rdma_id_private
*id_priv
)
2965 struct rdma_bind_list
*bind_list
;
2966 unsigned short snum
;
2969 snum
= ntohs(cma_port(cma_src_addr(id_priv
)));
2970 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
2973 bind_list
= cma_ps_find(id_priv
->id
.route
.addr
.dev_addr
.net
, ps
, snum
);
2975 ret
= cma_alloc_port(ps
, id_priv
, snum
);
2977 ret
= cma_check_port(bind_list
, id_priv
, id_priv
->reuseaddr
);
2979 cma_bind_port(bind_list
, id_priv
);
2984 static int cma_bind_listen(struct rdma_id_private
*id_priv
)
2986 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
2990 if (bind_list
->owners
.first
->next
)
2991 ret
= cma_check_port(bind_list
, id_priv
, 0);
2992 mutex_unlock(&lock
);
2996 static enum rdma_port_space
cma_select_inet_ps(
2997 struct rdma_id_private
*id_priv
)
2999 switch (id_priv
->id
.ps
) {
3004 return id_priv
->id
.ps
;
3011 static enum rdma_port_space
cma_select_ib_ps(struct rdma_id_private
*id_priv
)
3013 enum rdma_port_space ps
= 0;
3014 struct sockaddr_ib
*sib
;
3015 u64 sid_ps
, mask
, sid
;
3017 sib
= (struct sockaddr_ib
*) cma_src_addr(id_priv
);
3018 mask
= be64_to_cpu(sib
->sib_sid_mask
) & RDMA_IB_IP_PS_MASK
;
3019 sid
= be64_to_cpu(sib
->sib_sid
) & mask
;
3021 if ((id_priv
->id
.ps
== RDMA_PS_IB
) && (sid
== (RDMA_IB_IP_PS_IB
& mask
))) {
3022 sid_ps
= RDMA_IB_IP_PS_IB
;
3024 } else if (((id_priv
->id
.ps
== RDMA_PS_IB
) || (id_priv
->id
.ps
== RDMA_PS_TCP
)) &&
3025 (sid
== (RDMA_IB_IP_PS_TCP
& mask
))) {
3026 sid_ps
= RDMA_IB_IP_PS_TCP
;
3028 } else if (((id_priv
->id
.ps
== RDMA_PS_IB
) || (id_priv
->id
.ps
== RDMA_PS_UDP
)) &&
3029 (sid
== (RDMA_IB_IP_PS_UDP
& mask
))) {
3030 sid_ps
= RDMA_IB_IP_PS_UDP
;
3035 sib
->sib_sid
= cpu_to_be64(sid_ps
| ntohs(cma_port((struct sockaddr
*) sib
)));
3036 sib
->sib_sid_mask
= cpu_to_be64(RDMA_IB_IP_PS_MASK
|
3037 be64_to_cpu(sib
->sib_sid_mask
));
3042 static int cma_get_port(struct rdma_id_private
*id_priv
)
3044 enum rdma_port_space ps
;
3047 if (cma_family(id_priv
) != AF_IB
)
3048 ps
= cma_select_inet_ps(id_priv
);
3050 ps
= cma_select_ib_ps(id_priv
);
3052 return -EPROTONOSUPPORT
;
3055 if (cma_any_port(cma_src_addr(id_priv
)))
3056 ret
= cma_alloc_any_port(ps
, id_priv
);
3058 ret
= cma_use_port(ps
, id_priv
);
3059 mutex_unlock(&lock
);
3064 static int cma_check_linklocal(struct rdma_dev_addr
*dev_addr
,
3065 struct sockaddr
*addr
)
3067 #if IS_ENABLED(CONFIG_IPV6)
3068 struct sockaddr_in6
*sin6
;
3070 if (addr
->sa_family
!= AF_INET6
)
3073 sin6
= (struct sockaddr_in6
*) addr
;
3075 if (!(ipv6_addr_type(&sin6
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
))
3078 if (!sin6
->sin6_scope_id
)
3081 dev_addr
->bound_dev_if
= sin6
->sin6_scope_id
;
3086 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
3088 struct rdma_id_private
*id_priv
;
3091 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3092 if (id_priv
->state
== RDMA_CM_IDLE
) {
3093 id
->route
.addr
.src_addr
.ss_family
= AF_INET
;
3094 ret
= rdma_bind_addr(id
, cma_src_addr(id_priv
));
3099 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_BOUND
, RDMA_CM_LISTEN
))
3102 if (id_priv
->reuseaddr
) {
3103 ret
= cma_bind_listen(id_priv
);
3108 id_priv
->backlog
= backlog
;
3110 if (rdma_cap_ib_cm(id
->device
, 1)) {
3111 ret
= cma_ib_listen(id_priv
);
3114 } else if (rdma_cap_iw_cm(id
->device
, 1)) {
3115 ret
= cma_iw_listen(id_priv
, backlog
);
3123 cma_listen_on_all(id_priv
);
3127 id_priv
->backlog
= 0;
3128 cma_comp_exch(id_priv
, RDMA_CM_LISTEN
, RDMA_CM_ADDR_BOUND
);
3131 EXPORT_SYMBOL(rdma_listen
);
3133 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
3135 struct rdma_id_private
*id_priv
;
3138 if (addr
->sa_family
!= AF_INET
&& addr
->sa_family
!= AF_INET6
&&
3139 addr
->sa_family
!= AF_IB
)
3140 return -EAFNOSUPPORT
;
3142 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3143 if (!cma_comp_exch(id_priv
, RDMA_CM_IDLE
, RDMA_CM_ADDR_BOUND
))
3146 ret
= cma_check_linklocal(&id
->route
.addr
.dev_addr
, addr
);
3150 memcpy(cma_src_addr(id_priv
), addr
, rdma_addr_size(addr
));
3151 if (!cma_any_addr(addr
)) {
3152 ret
= cma_translate_addr(addr
, &id
->route
.addr
.dev_addr
);
3156 ret
= cma_acquire_dev(id_priv
, NULL
);
3161 if (!(id_priv
->options
& (1 << CMA_OPTION_AFONLY
))) {
3162 if (addr
->sa_family
== AF_INET
)
3163 id_priv
->afonly
= 1;
3164 #if IS_ENABLED(CONFIG_IPV6)
3165 else if (addr
->sa_family
== AF_INET6
) {
3166 struct net
*net
= id_priv
->id
.route
.addr
.dev_addr
.net
;
3168 id_priv
->afonly
= net
->ipv6
.sysctl
.bindv6only
;
3172 ret
= cma_get_port(id_priv
);
3178 if (id_priv
->cma_dev
)
3179 cma_release_dev(id_priv
);
3181 cma_comp_exch(id_priv
, RDMA_CM_ADDR_BOUND
, RDMA_CM_IDLE
);
3184 EXPORT_SYMBOL(rdma_bind_addr
);
3186 static int cma_format_hdr(void *hdr
, struct rdma_id_private
*id_priv
)
3188 struct cma_hdr
*cma_hdr
;
3191 cma_hdr
->cma_version
= CMA_VERSION
;
3192 if (cma_family(id_priv
) == AF_INET
) {
3193 struct sockaddr_in
*src4
, *dst4
;
3195 src4
= (struct sockaddr_in
*) cma_src_addr(id_priv
);
3196 dst4
= (struct sockaddr_in
*) cma_dst_addr(id_priv
);
3198 cma_set_ip_ver(cma_hdr
, 4);
3199 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
3200 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
3201 cma_hdr
->port
= src4
->sin_port
;
3202 } else if (cma_family(id_priv
) == AF_INET6
) {
3203 struct sockaddr_in6
*src6
, *dst6
;
3205 src6
= (struct sockaddr_in6
*) cma_src_addr(id_priv
);
3206 dst6
= (struct sockaddr_in6
*) cma_dst_addr(id_priv
);
3208 cma_set_ip_ver(cma_hdr
, 6);
3209 cma_hdr
->src_addr
.ip6
= src6
->sin6_addr
;
3210 cma_hdr
->dst_addr
.ip6
= dst6
->sin6_addr
;
3211 cma_hdr
->port
= src6
->sin6_port
;
3216 static int cma_sidr_rep_handler(struct ib_cm_id
*cm_id
,
3217 struct ib_cm_event
*ib_event
)
3219 struct rdma_id_private
*id_priv
= cm_id
->context
;
3220 struct rdma_cm_event event
;
3221 struct ib_cm_sidr_rep_event_param
*rep
= &ib_event
->param
.sidr_rep_rcvd
;
3224 mutex_lock(&id_priv
->handler_mutex
);
3225 if (id_priv
->state
!= RDMA_CM_CONNECT
)
3228 memset(&event
, 0, sizeof event
);
3229 switch (ib_event
->event
) {
3230 case IB_CM_SIDR_REQ_ERROR
:
3231 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
3232 event
.status
= -ETIMEDOUT
;
3234 case IB_CM_SIDR_REP_RECEIVED
:
3235 event
.param
.ud
.private_data
= ib_event
->private_data
;
3236 event
.param
.ud
.private_data_len
= IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
;
3237 if (rep
->status
!= IB_SIDR_SUCCESS
) {
3238 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
3239 event
.status
= ib_event
->param
.sidr_rep_rcvd
.status
;
3242 ret
= cma_set_qkey(id_priv
, rep
->qkey
);
3244 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
3248 ib_init_ah_from_path(id_priv
->id
.device
, id_priv
->id
.port_num
,
3249 id_priv
->id
.route
.path_rec
,
3250 &event
.param
.ud
.ah_attr
);
3251 event
.param
.ud
.qp_num
= rep
->qpn
;
3252 event
.param
.ud
.qkey
= rep
->qkey
;
3253 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
3257 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3262 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
3264 /* Destroy the CM ID by returning a non-zero value. */
3265 id_priv
->cm_id
.ib
= NULL
;
3266 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
3267 mutex_unlock(&id_priv
->handler_mutex
);
3268 rdma_destroy_id(&id_priv
->id
);
3272 mutex_unlock(&id_priv
->handler_mutex
);
3276 static int cma_resolve_ib_udp(struct rdma_id_private
*id_priv
,
3277 struct rdma_conn_param
*conn_param
)
3279 struct ib_cm_sidr_req_param req
;
3280 struct ib_cm_id
*id
;
3284 memset(&req
, 0, sizeof req
);
3285 offset
= cma_user_data_offset(id_priv
);
3286 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
3287 if (req
.private_data_len
< conn_param
->private_data_len
)
3290 if (req
.private_data_len
) {
3291 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
3295 private_data
= NULL
;
3298 if (conn_param
->private_data
&& conn_param
->private_data_len
)
3299 memcpy(private_data
+ offset
, conn_param
->private_data
,
3300 conn_param
->private_data_len
);
3303 ret
= cma_format_hdr(private_data
, id_priv
);
3306 req
.private_data
= private_data
;
3309 id
= ib_create_cm_id(id_priv
->id
.device
, cma_sidr_rep_handler
,
3315 id_priv
->cm_id
.ib
= id
;
3317 req
.path
= id_priv
->id
.route
.path_rec
;
3318 req
.service_id
= rdma_get_service_id(&id_priv
->id
, cma_dst_addr(id_priv
));
3319 req
.timeout_ms
= 1 << (CMA_CM_RESPONSE_TIMEOUT
- 8);
3320 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
3322 ret
= ib_send_cm_sidr_req(id_priv
->cm_id
.ib
, &req
);
3324 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
3325 id_priv
->cm_id
.ib
= NULL
;
3328 kfree(private_data
);
3332 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
3333 struct rdma_conn_param
*conn_param
)
3335 struct ib_cm_req_param req
;
3336 struct rdma_route
*route
;
3338 struct ib_cm_id
*id
;
3341 memset(&req
, 0, sizeof req
);
3342 offset
= cma_user_data_offset(id_priv
);
3343 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
3344 if (req
.private_data_len
< conn_param
->private_data_len
)
3347 if (req
.private_data_len
) {
3348 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
3352 private_data
= NULL
;
3355 if (conn_param
->private_data
&& conn_param
->private_data_len
)
3356 memcpy(private_data
+ offset
, conn_param
->private_data
,
3357 conn_param
->private_data_len
);
3359 id
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
, id_priv
);
3364 id_priv
->cm_id
.ib
= id
;
3366 route
= &id_priv
->id
.route
;
3368 ret
= cma_format_hdr(private_data
, id_priv
);
3371 req
.private_data
= private_data
;
3374 req
.primary_path
= &route
->path_rec
[0];
3375 if (route
->num_paths
== 2)
3376 req
.alternate_path
= &route
->path_rec
[1];
3378 req
.service_id
= rdma_get_service_id(&id_priv
->id
, cma_dst_addr(id_priv
));
3379 req
.qp_num
= id_priv
->qp_num
;
3380 req
.qp_type
= id_priv
->id
.qp_type
;
3381 req
.starting_psn
= id_priv
->seq_num
;
3382 req
.responder_resources
= conn_param
->responder_resources
;
3383 req
.initiator_depth
= conn_param
->initiator_depth
;
3384 req
.flow_control
= conn_param
->flow_control
;
3385 req
.retry_count
= min_t(u8
, 7, conn_param
->retry_count
);
3386 req
.rnr_retry_count
= min_t(u8
, 7, conn_param
->rnr_retry_count
);
3387 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
3388 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
3389 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
3390 req
.srq
= id_priv
->srq
? 1 : 0;
3392 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
3394 if (ret
&& !IS_ERR(id
)) {
3395 ib_destroy_cm_id(id
);
3396 id_priv
->cm_id
.ib
= NULL
;
3399 kfree(private_data
);
3403 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
3404 struct rdma_conn_param
*conn_param
)
3406 struct iw_cm_id
*cm_id
;
3408 struct iw_cm_conn_param iw_param
;
3410 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
3412 return PTR_ERR(cm_id
);
3414 cm_id
->tos
= id_priv
->tos
;
3415 id_priv
->cm_id
.iw
= cm_id
;
3417 memcpy(&cm_id
->local_addr
, cma_src_addr(id_priv
),
3418 rdma_addr_size(cma_src_addr(id_priv
)));
3419 memcpy(&cm_id
->remote_addr
, cma_dst_addr(id_priv
),
3420 rdma_addr_size(cma_dst_addr(id_priv
)));
3422 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
3427 iw_param
.ord
= conn_param
->initiator_depth
;
3428 iw_param
.ird
= conn_param
->responder_resources
;
3429 iw_param
.private_data
= conn_param
->private_data
;
3430 iw_param
.private_data_len
= conn_param
->private_data_len
;
3431 iw_param
.qpn
= id_priv
->id
.qp
? id_priv
->qp_num
: conn_param
->qp_num
;
3433 memset(&iw_param
, 0, sizeof iw_param
);
3434 iw_param
.qpn
= id_priv
->qp_num
;
3436 ret
= iw_cm_connect(cm_id
, &iw_param
);
3439 iw_destroy_cm_id(cm_id
);
3440 id_priv
->cm_id
.iw
= NULL
;
3445 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
3447 struct rdma_id_private
*id_priv
;
3450 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3451 if (!cma_comp_exch(id_priv
, RDMA_CM_ROUTE_RESOLVED
, RDMA_CM_CONNECT
))
3455 id_priv
->qp_num
= conn_param
->qp_num
;
3456 id_priv
->srq
= conn_param
->srq
;
3459 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
3460 if (id
->qp_type
== IB_QPT_UD
)
3461 ret
= cma_resolve_ib_udp(id_priv
, conn_param
);
3463 ret
= cma_connect_ib(id_priv
, conn_param
);
3464 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
))
3465 ret
= cma_connect_iw(id_priv
, conn_param
);
3473 cma_comp_exch(id_priv
, RDMA_CM_CONNECT
, RDMA_CM_ROUTE_RESOLVED
);
3476 EXPORT_SYMBOL(rdma_connect
);
3478 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
3479 struct rdma_conn_param
*conn_param
)
3481 struct ib_cm_rep_param rep
;
3484 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
3488 ret
= cma_modify_qp_rts(id_priv
, conn_param
);
3492 memset(&rep
, 0, sizeof rep
);
3493 rep
.qp_num
= id_priv
->qp_num
;
3494 rep
.starting_psn
= id_priv
->seq_num
;
3495 rep
.private_data
= conn_param
->private_data
;
3496 rep
.private_data_len
= conn_param
->private_data_len
;
3497 rep
.responder_resources
= conn_param
->responder_resources
;
3498 rep
.initiator_depth
= conn_param
->initiator_depth
;
3499 rep
.failover_accepted
= 0;
3500 rep
.flow_control
= conn_param
->flow_control
;
3501 rep
.rnr_retry_count
= min_t(u8
, 7, conn_param
->rnr_retry_count
);
3502 rep
.srq
= id_priv
->srq
? 1 : 0;
3504 ret
= ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
3509 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
3510 struct rdma_conn_param
*conn_param
)
3512 struct iw_cm_conn_param iw_param
;
3515 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
3519 iw_param
.ord
= conn_param
->initiator_depth
;
3520 iw_param
.ird
= conn_param
->responder_resources
;
3521 iw_param
.private_data
= conn_param
->private_data
;
3522 iw_param
.private_data_len
= conn_param
->private_data_len
;
3523 if (id_priv
->id
.qp
) {
3524 iw_param
.qpn
= id_priv
->qp_num
;
3526 iw_param
.qpn
= conn_param
->qp_num
;
3528 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
3531 static int cma_send_sidr_rep(struct rdma_id_private
*id_priv
,
3532 enum ib_cm_sidr_status status
, u32 qkey
,
3533 const void *private_data
, int private_data_len
)
3535 struct ib_cm_sidr_rep_param rep
;
3538 memset(&rep
, 0, sizeof rep
);
3539 rep
.status
= status
;
3540 if (status
== IB_SIDR_SUCCESS
) {
3541 ret
= cma_set_qkey(id_priv
, qkey
);
3544 rep
.qp_num
= id_priv
->qp_num
;
3545 rep
.qkey
= id_priv
->qkey
;
3547 rep
.private_data
= private_data
;
3548 rep
.private_data_len
= private_data_len
;
3550 return ib_send_cm_sidr_rep(id_priv
->cm_id
.ib
, &rep
);
3553 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
3555 struct rdma_id_private
*id_priv
;
3558 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3560 id_priv
->owner
= task_pid_nr(current
);
3562 if (!cma_comp(id_priv
, RDMA_CM_CONNECT
))
3565 if (!id
->qp
&& conn_param
) {
3566 id_priv
->qp_num
= conn_param
->qp_num
;
3567 id_priv
->srq
= conn_param
->srq
;
3570 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
3571 if (id
->qp_type
== IB_QPT_UD
) {
3573 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
3575 conn_param
->private_data
,
3576 conn_param
->private_data_len
);
3578 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
3582 ret
= cma_accept_ib(id_priv
, conn_param
);
3584 ret
= cma_rep_recv(id_priv
);
3586 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
))
3587 ret
= cma_accept_iw(id_priv
, conn_param
);
3596 cma_modify_qp_err(id_priv
);
3597 rdma_reject(id
, NULL
, 0);
3600 EXPORT_SYMBOL(rdma_accept
);
3602 int rdma_notify(struct rdma_cm_id
*id
, enum ib_event_type event
)
3604 struct rdma_id_private
*id_priv
;
3607 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3608 if (!id_priv
->cm_id
.ib
)
3611 switch (id
->device
->node_type
) {
3612 case RDMA_NODE_IB_CA
:
3613 ret
= ib_cm_notify(id_priv
->cm_id
.ib
, event
);
3621 EXPORT_SYMBOL(rdma_notify
);
3623 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
3624 u8 private_data_len
)
3626 struct rdma_id_private
*id_priv
;
3629 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3630 if (!id_priv
->cm_id
.ib
)
3633 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
3634 if (id
->qp_type
== IB_QPT_UD
)
3635 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_REJECT
, 0,
3636 private_data
, private_data_len
);
3638 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
3639 IB_CM_REJ_CONSUMER_DEFINED
, NULL
,
3640 0, private_data
, private_data_len
);
3641 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
)) {
3642 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
3643 private_data
, private_data_len
);
3649 EXPORT_SYMBOL(rdma_reject
);
3651 int rdma_disconnect(struct rdma_cm_id
*id
)
3653 struct rdma_id_private
*id_priv
;
3656 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3657 if (!id_priv
->cm_id
.ib
)
3660 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
3661 ret
= cma_modify_qp_err(id_priv
);
3664 /* Initiate or respond to a disconnect. */
3665 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
3666 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
3667 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
)) {
3668 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
3675 EXPORT_SYMBOL(rdma_disconnect
);
3677 static int cma_ib_mc_handler(int status
, struct ib_sa_multicast
*multicast
)
3679 struct rdma_id_private
*id_priv
;
3680 struct cma_multicast
*mc
= multicast
->context
;
3681 struct rdma_cm_event event
;
3684 id_priv
= mc
->id_priv
;
3685 mutex_lock(&id_priv
->handler_mutex
);
3686 if (id_priv
->state
!= RDMA_CM_ADDR_BOUND
&&
3687 id_priv
->state
!= RDMA_CM_ADDR_RESOLVED
)
3691 status
= cma_set_qkey(id_priv
, be32_to_cpu(multicast
->rec
.qkey
));
3692 mutex_lock(&id_priv
->qp_mutex
);
3693 if (!status
&& id_priv
->id
.qp
)
3694 status
= ib_attach_mcast(id_priv
->id
.qp
, &multicast
->rec
.mgid
,
3695 be16_to_cpu(multicast
->rec
.mlid
));
3696 mutex_unlock(&id_priv
->qp_mutex
);
3698 memset(&event
, 0, sizeof event
);
3699 event
.status
= status
;
3700 event
.param
.ud
.private_data
= mc
->context
;
3702 struct rdma_dev_addr
*dev_addr
=
3703 &id_priv
->id
.route
.addr
.dev_addr
;
3704 struct net_device
*ndev
=
3705 dev_get_by_index(&init_net
, dev_addr
->bound_dev_if
);
3706 enum ib_gid_type gid_type
=
3707 id_priv
->cma_dev
->default_gid_type
[id_priv
->id
.port_num
-
3708 rdma_start_port(id_priv
->cma_dev
->device
)];
3710 event
.event
= RDMA_CM_EVENT_MULTICAST_JOIN
;
3711 ib_init_ah_from_mcmember(id_priv
->id
.device
,
3712 id_priv
->id
.port_num
, &multicast
->rec
,
3714 &event
.param
.ud
.ah_attr
);
3715 event
.param
.ud
.qp_num
= 0xFFFFFF;
3716 event
.param
.ud
.qkey
= be32_to_cpu(multicast
->rec
.qkey
);
3720 event
.event
= RDMA_CM_EVENT_MULTICAST_ERROR
;
3722 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
3724 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
3725 mutex_unlock(&id_priv
->handler_mutex
);
3726 rdma_destroy_id(&id_priv
->id
);
3731 mutex_unlock(&id_priv
->handler_mutex
);
3735 static void cma_set_mgid(struct rdma_id_private
*id_priv
,
3736 struct sockaddr
*addr
, union ib_gid
*mgid
)
3738 unsigned char mc_map
[MAX_ADDR_LEN
];
3739 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
3740 struct sockaddr_in
*sin
= (struct sockaddr_in
*) addr
;
3741 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) addr
;
3743 if (cma_any_addr(addr
)) {
3744 memset(mgid
, 0, sizeof *mgid
);
3745 } else if ((addr
->sa_family
== AF_INET6
) &&
3746 ((be32_to_cpu(sin6
->sin6_addr
.s6_addr32
[0]) & 0xFFF0FFFF) ==
3748 /* IPv6 address is an SA assigned MGID. */
3749 memcpy(mgid
, &sin6
->sin6_addr
, sizeof *mgid
);
3750 } else if (addr
->sa_family
== AF_IB
) {
3751 memcpy(mgid
, &((struct sockaddr_ib
*) addr
)->sib_addr
, sizeof *mgid
);
3752 } else if ((addr
->sa_family
== AF_INET6
)) {
3753 ipv6_ib_mc_map(&sin6
->sin6_addr
, dev_addr
->broadcast
, mc_map
);
3754 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
3755 mc_map
[7] = 0x01; /* Use RDMA CM signature */
3756 *mgid
= *(union ib_gid
*) (mc_map
+ 4);
3758 ip_ib_mc_map(sin
->sin_addr
.s_addr
, dev_addr
->broadcast
, mc_map
);
3759 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
3760 mc_map
[7] = 0x01; /* Use RDMA CM signature */
3761 *mgid
= *(union ib_gid
*) (mc_map
+ 4);
3765 static void cma_query_sa_classport_info_cb(int status
,
3766 struct ib_class_port_info
*rec
,
3769 struct class_port_info_context
*cb_ctx
= context
;
3773 if (status
|| !rec
) {
3774 pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n",
3775 cb_ctx
->device
->name
, cb_ctx
->port_num
, status
);
3779 memcpy(cb_ctx
->class_port_info
, rec
, sizeof(struct ib_class_port_info
));
3782 complete(&cb_ctx
->done
);
3785 static int cma_query_sa_classport_info(struct ib_device
*device
, u8 port_num
,
3786 struct ib_class_port_info
*class_port_info
)
3788 struct class_port_info_context
*cb_ctx
;
3791 cb_ctx
= kmalloc(sizeof(*cb_ctx
), GFP_KERNEL
);
3795 cb_ctx
->device
= device
;
3796 cb_ctx
->class_port_info
= class_port_info
;
3797 cb_ctx
->port_num
= port_num
;
3798 init_completion(&cb_ctx
->done
);
3800 ret
= ib_sa_classport_info_rec_query(&sa_client
, device
, port_num
,
3801 CMA_QUERY_CLASSPORT_INFO_TIMEOUT
,
3802 GFP_KERNEL
, cma_query_sa_classport_info_cb
,
3803 cb_ctx
, &cb_ctx
->sa_query
);
3805 pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n",
3806 device
->name
, port_num
, ret
);
3810 wait_for_completion(&cb_ctx
->done
);
3817 static int cma_join_ib_multicast(struct rdma_id_private
*id_priv
,
3818 struct cma_multicast
*mc
)
3820 struct ib_sa_mcmember_rec rec
;
3821 struct ib_class_port_info class_port_info
;
3822 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
3823 ib_sa_comp_mask comp_mask
;
3826 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
3827 ret
= ib_sa_get_mcmember_rec(id_priv
->id
.device
, id_priv
->id
.port_num
,
3832 ret
= cma_set_qkey(id_priv
, 0);
3836 cma_set_mgid(id_priv
, (struct sockaddr
*) &mc
->addr
, &rec
.mgid
);
3837 rec
.qkey
= cpu_to_be32(id_priv
->qkey
);
3838 rdma_addr_get_sgid(dev_addr
, &rec
.port_gid
);
3839 rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(dev_addr
));
3840 rec
.join_state
= mc
->join_state
;
3842 if (rec
.join_state
== BIT(SENDONLY_FULLMEMBER_JOIN
)) {
3843 ret
= cma_query_sa_classport_info(id_priv
->id
.device
,
3844 id_priv
->id
.port_num
,
3850 if (!(ib_get_cpi_capmask2(&class_port_info
) &
3851 IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT
)) {
3852 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
3853 "RDMA CM: SM doesn't support Send Only Full Member option\n",
3854 id_priv
->id
.device
->name
, id_priv
->id
.port_num
);
3859 comp_mask
= IB_SA_MCMEMBER_REC_MGID
| IB_SA_MCMEMBER_REC_PORT_GID
|
3860 IB_SA_MCMEMBER_REC_PKEY
| IB_SA_MCMEMBER_REC_JOIN_STATE
|
3861 IB_SA_MCMEMBER_REC_QKEY
| IB_SA_MCMEMBER_REC_SL
|
3862 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
3863 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
;
3865 if (id_priv
->id
.ps
== RDMA_PS_IPOIB
)
3866 comp_mask
|= IB_SA_MCMEMBER_REC_RATE
|
3867 IB_SA_MCMEMBER_REC_RATE_SELECTOR
|
3868 IB_SA_MCMEMBER_REC_MTU_SELECTOR
|
3869 IB_SA_MCMEMBER_REC_MTU
|
3870 IB_SA_MCMEMBER_REC_HOP_LIMIT
;
3872 mc
->multicast
.ib
= ib_sa_join_multicast(&sa_client
, id_priv
->id
.device
,
3873 id_priv
->id
.port_num
, &rec
,
3874 comp_mask
, GFP_KERNEL
,
3875 cma_ib_mc_handler
, mc
);
3876 return PTR_ERR_OR_ZERO(mc
->multicast
.ib
);
3879 static void iboe_mcast_work_handler(struct work_struct
*work
)
3881 struct iboe_mcast_work
*mw
= container_of(work
, struct iboe_mcast_work
, work
);
3882 struct cma_multicast
*mc
= mw
->mc
;
3883 struct ib_sa_multicast
*m
= mc
->multicast
.ib
;
3885 mc
->multicast
.ib
->context
= mc
;
3886 cma_ib_mc_handler(0, m
);
3887 kref_put(&mc
->mcref
, release_mc
);
3891 static void cma_iboe_set_mgid(struct sockaddr
*addr
, union ib_gid
*mgid
)
3893 struct sockaddr_in
*sin
= (struct sockaddr_in
*)addr
;
3894 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*)addr
;
3896 if (cma_any_addr(addr
)) {
3897 memset(mgid
, 0, sizeof *mgid
);
3898 } else if (addr
->sa_family
== AF_INET6
) {
3899 memcpy(mgid
, &sin6
->sin6_addr
, sizeof *mgid
);
3901 mgid
->raw
[0] = 0xff;
3902 mgid
->raw
[1] = 0x0e;
3911 mgid
->raw
[10] = 0xff;
3912 mgid
->raw
[11] = 0xff;
3913 *(__be32
*)(&mgid
->raw
[12]) = sin
->sin_addr
.s_addr
;
3917 static int cma_iboe_join_multicast(struct rdma_id_private
*id_priv
,
3918 struct cma_multicast
*mc
)
3920 struct iboe_mcast_work
*work
;
3921 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
3923 struct sockaddr
*addr
= (struct sockaddr
*)&mc
->addr
;
3924 struct net_device
*ndev
= NULL
;
3925 enum ib_gid_type gid_type
;
3928 send_only
= mc
->join_state
== BIT(SENDONLY_FULLMEMBER_JOIN
);
3930 if (cma_zero_addr((struct sockaddr
*)&mc
->addr
))
3933 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
3937 mc
->multicast
.ib
= kzalloc(sizeof(struct ib_sa_multicast
), GFP_KERNEL
);
3938 if (!mc
->multicast
.ib
) {
3943 cma_iboe_set_mgid(addr
, &mc
->multicast
.ib
->rec
.mgid
);
3945 mc
->multicast
.ib
->rec
.pkey
= cpu_to_be16(0xffff);
3946 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
3947 mc
->multicast
.ib
->rec
.qkey
= cpu_to_be32(RDMA_UDP_QKEY
);
3949 if (dev_addr
->bound_dev_if
)
3950 ndev
= dev_get_by_index(&init_net
, dev_addr
->bound_dev_if
);
3955 mc
->multicast
.ib
->rec
.rate
= iboe_get_rate(ndev
);
3956 mc
->multicast
.ib
->rec
.hop_limit
= 1;
3957 mc
->multicast
.ib
->rec
.mtu
= iboe_get_mtu(ndev
->mtu
);
3959 gid_type
= id_priv
->cma_dev
->default_gid_type
[id_priv
->id
.port_num
-
3960 rdma_start_port(id_priv
->cma_dev
->device
)];
3961 if (addr
->sa_family
== AF_INET
) {
3962 if (gid_type
== IB_GID_TYPE_ROCE_UDP_ENCAP
) {
3963 mc
->multicast
.ib
->rec
.hop_limit
= IPV6_DEFAULT_HOPLIMIT
;
3965 err
= cma_igmp_send(ndev
, &mc
->multicast
.ib
->rec
.mgid
,
3968 mc
->igmp_joined
= true;
3972 if (gid_type
== IB_GID_TYPE_ROCE_UDP_ENCAP
)
3976 if (err
|| !mc
->multicast
.ib
->rec
.mtu
) {
3981 rdma_ip2gid((struct sockaddr
*)&id_priv
->id
.route
.addr
.src_addr
,
3982 &mc
->multicast
.ib
->rec
.port_gid
);
3985 INIT_WORK(&work
->work
, iboe_mcast_work_handler
);
3986 kref_get(&mc
->mcref
);
3987 queue_work(cma_wq
, &work
->work
);
3992 kfree(mc
->multicast
.ib
);
3998 int rdma_join_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
,
3999 u8 join_state
, void *context
)
4001 struct rdma_id_private
*id_priv
;
4002 struct cma_multicast
*mc
;
4005 id_priv
= container_of(id
, struct rdma_id_private
, id
);
4006 if (!cma_comp(id_priv
, RDMA_CM_ADDR_BOUND
) &&
4007 !cma_comp(id_priv
, RDMA_CM_ADDR_RESOLVED
))
4010 mc
= kmalloc(sizeof *mc
, GFP_KERNEL
);
4014 memcpy(&mc
->addr
, addr
, rdma_addr_size(addr
));
4015 mc
->context
= context
;
4016 mc
->id_priv
= id_priv
;
4017 mc
->igmp_joined
= false;
4018 mc
->join_state
= join_state
;
4019 spin_lock(&id_priv
->lock
);
4020 list_add(&mc
->list
, &id_priv
->mc_list
);
4021 spin_unlock(&id_priv
->lock
);
4023 if (rdma_protocol_roce(id
->device
, id
->port_num
)) {
4024 kref_init(&mc
->mcref
);
4025 ret
= cma_iboe_join_multicast(id_priv
, mc
);
4026 } else if (rdma_cap_ib_mcast(id
->device
, id
->port_num
))
4027 ret
= cma_join_ib_multicast(id_priv
, mc
);
4032 spin_lock_irq(&id_priv
->lock
);
4033 list_del(&mc
->list
);
4034 spin_unlock_irq(&id_priv
->lock
);
4039 EXPORT_SYMBOL(rdma_join_multicast
);
4041 void rdma_leave_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
4043 struct rdma_id_private
*id_priv
;
4044 struct cma_multicast
*mc
;
4046 id_priv
= container_of(id
, struct rdma_id_private
, id
);
4047 spin_lock_irq(&id_priv
->lock
);
4048 list_for_each_entry(mc
, &id_priv
->mc_list
, list
) {
4049 if (!memcmp(&mc
->addr
, addr
, rdma_addr_size(addr
))) {
4050 list_del(&mc
->list
);
4051 spin_unlock_irq(&id_priv
->lock
);
4054 ib_detach_mcast(id
->qp
,
4055 &mc
->multicast
.ib
->rec
.mgid
,
4056 be16_to_cpu(mc
->multicast
.ib
->rec
.mlid
));
4058 BUG_ON(id_priv
->cma_dev
->device
!= id
->device
);
4060 if (rdma_cap_ib_mcast(id
->device
, id
->port_num
)) {
4061 ib_sa_free_multicast(mc
->multicast
.ib
);
4063 } else if (rdma_protocol_roce(id
->device
, id
->port_num
)) {
4064 if (mc
->igmp_joined
) {
4065 struct rdma_dev_addr
*dev_addr
=
4066 &id
->route
.addr
.dev_addr
;
4067 struct net_device
*ndev
= NULL
;
4069 if (dev_addr
->bound_dev_if
)
4070 ndev
= dev_get_by_index(&init_net
,
4071 dev_addr
->bound_dev_if
);
4074 &mc
->multicast
.ib
->rec
.mgid
,
4078 mc
->igmp_joined
= false;
4080 kref_put(&mc
->mcref
, release_mc
);
4085 spin_unlock_irq(&id_priv
->lock
);
4087 EXPORT_SYMBOL(rdma_leave_multicast
);
4089 static int cma_netdev_change(struct net_device
*ndev
, struct rdma_id_private
*id_priv
)
4091 struct rdma_dev_addr
*dev_addr
;
4092 struct cma_ndev_work
*work
;
4094 dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
4096 if ((dev_addr
->bound_dev_if
== ndev
->ifindex
) &&
4097 (net_eq(dev_net(ndev
), dev_addr
->net
)) &&
4098 memcmp(dev_addr
->src_dev_addr
, ndev
->dev_addr
, ndev
->addr_len
)) {
4099 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4100 ndev
->name
, &id_priv
->id
);
4101 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
4105 INIT_WORK(&work
->work
, cma_ndev_work_handler
);
4107 work
->event
.event
= RDMA_CM_EVENT_ADDR_CHANGE
;
4108 atomic_inc(&id_priv
->refcount
);
4109 queue_work(cma_wq
, &work
->work
);
4115 static int cma_netdev_callback(struct notifier_block
*self
, unsigned long event
,
4118 struct net_device
*ndev
= netdev_notifier_info_to_dev(ptr
);
4119 struct cma_device
*cma_dev
;
4120 struct rdma_id_private
*id_priv
;
4121 int ret
= NOTIFY_DONE
;
4123 if (event
!= NETDEV_BONDING_FAILOVER
)
4126 if (!(ndev
->flags
& IFF_MASTER
) || !(ndev
->priv_flags
& IFF_BONDING
))
4130 list_for_each_entry(cma_dev
, &dev_list
, list
)
4131 list_for_each_entry(id_priv
, &cma_dev
->id_list
, list
) {
4132 ret
= cma_netdev_change(ndev
, id_priv
);
4138 mutex_unlock(&lock
);
4142 static struct notifier_block cma_nb
= {
4143 .notifier_call
= cma_netdev_callback
4146 static void cma_add_one(struct ib_device
*device
)
4148 struct cma_device
*cma_dev
;
4149 struct rdma_id_private
*id_priv
;
4151 unsigned long supported_gids
= 0;
4153 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
4157 cma_dev
->device
= device
;
4158 cma_dev
->default_gid_type
= kcalloc(device
->phys_port_cnt
,
4159 sizeof(*cma_dev
->default_gid_type
),
4161 if (!cma_dev
->default_gid_type
) {
4165 for (i
= rdma_start_port(device
); i
<= rdma_end_port(device
); i
++) {
4166 supported_gids
= roce_gid_type_mask_support(device
, i
);
4167 WARN_ON(!supported_gids
);
4168 cma_dev
->default_gid_type
[i
- rdma_start_port(device
)] =
4169 find_first_bit(&supported_gids
, BITS_PER_LONG
);
4172 init_completion(&cma_dev
->comp
);
4173 atomic_set(&cma_dev
->refcount
, 1);
4174 INIT_LIST_HEAD(&cma_dev
->id_list
);
4175 ib_set_client_data(device
, &cma_client
, cma_dev
);
4178 list_add_tail(&cma_dev
->list
, &dev_list
);
4179 list_for_each_entry(id_priv
, &listen_any_list
, list
)
4180 cma_listen_on_dev(id_priv
, cma_dev
);
4181 mutex_unlock(&lock
);
4184 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
4186 struct rdma_cm_event event
;
4187 enum rdma_cm_state state
;
4190 /* Record that we want to remove the device */
4191 state
= cma_exch(id_priv
, RDMA_CM_DEVICE_REMOVAL
);
4192 if (state
== RDMA_CM_DESTROYING
)
4195 cma_cancel_operation(id_priv
, state
);
4196 mutex_lock(&id_priv
->handler_mutex
);
4198 /* Check for destruction from another callback. */
4199 if (!cma_comp(id_priv
, RDMA_CM_DEVICE_REMOVAL
))
4202 memset(&event
, 0, sizeof event
);
4203 event
.event
= RDMA_CM_EVENT_DEVICE_REMOVAL
;
4204 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
4206 mutex_unlock(&id_priv
->handler_mutex
);
4210 static void cma_process_remove(struct cma_device
*cma_dev
)
4212 struct rdma_id_private
*id_priv
;
4216 while (!list_empty(&cma_dev
->id_list
)) {
4217 id_priv
= list_entry(cma_dev
->id_list
.next
,
4218 struct rdma_id_private
, list
);
4220 list_del(&id_priv
->listen_list
);
4221 list_del_init(&id_priv
->list
);
4222 atomic_inc(&id_priv
->refcount
);
4223 mutex_unlock(&lock
);
4225 ret
= id_priv
->internal_id
? 1 : cma_remove_id_dev(id_priv
);
4226 cma_deref_id(id_priv
);
4228 rdma_destroy_id(&id_priv
->id
);
4232 mutex_unlock(&lock
);
4234 cma_deref_dev(cma_dev
);
4235 wait_for_completion(&cma_dev
->comp
);
4238 static void cma_remove_one(struct ib_device
*device
, void *client_data
)
4240 struct cma_device
*cma_dev
= client_data
;
4246 list_del(&cma_dev
->list
);
4247 mutex_unlock(&lock
);
4249 cma_process_remove(cma_dev
);
4250 kfree(cma_dev
->default_gid_type
);
4254 static int cma_get_id_stats(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4256 struct nlmsghdr
*nlh
;
4257 struct rdma_cm_id_stats
*id_stats
;
4258 struct rdma_id_private
*id_priv
;
4259 struct rdma_cm_id
*id
= NULL
;
4260 struct cma_device
*cma_dev
;
4261 int i_dev
= 0, i_id
= 0;
4264 * We export all of the IDs as a sequence of messages. Each
4265 * ID gets its own netlink message.
4269 list_for_each_entry(cma_dev
, &dev_list
, list
) {
4270 if (i_dev
< cb
->args
[0]) {
4276 list_for_each_entry(id_priv
, &cma_dev
->id_list
, list
) {
4277 if (i_id
< cb
->args
[1]) {
4282 id_stats
= ibnl_put_msg(skb
, &nlh
, cb
->nlh
->nlmsg_seq
,
4283 sizeof *id_stats
, RDMA_NL_RDMA_CM
,
4284 RDMA_NL_RDMA_CM_ID_STATS
,
4289 memset(id_stats
, 0, sizeof *id_stats
);
4291 id_stats
->node_type
= id
->route
.addr
.dev_addr
.dev_type
;
4292 id_stats
->port_num
= id
->port_num
;
4293 id_stats
->bound_dev_if
=
4294 id
->route
.addr
.dev_addr
.bound_dev_if
;
4296 if (ibnl_put_attr(skb
, nlh
,
4297 rdma_addr_size(cma_src_addr(id_priv
)),
4298 cma_src_addr(id_priv
),
4299 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR
))
4301 if (ibnl_put_attr(skb
, nlh
,
4302 rdma_addr_size(cma_src_addr(id_priv
)),
4303 cma_dst_addr(id_priv
),
4304 RDMA_NL_RDMA_CM_ATTR_DST_ADDR
))
4307 id_stats
->pid
= id_priv
->owner
;
4308 id_stats
->port_space
= id
->ps
;
4309 id_stats
->cm_state
= id_priv
->state
;
4310 id_stats
->qp_num
= id_priv
->qp_num
;
4311 id_stats
->qp_type
= id
->qp_type
;
4321 mutex_unlock(&lock
);
4322 cb
->args
[0] = i_dev
;
4328 static const struct ibnl_client_cbs cma_cb_table
[] = {
4329 [RDMA_NL_RDMA_CM_ID_STATS
] = { .dump
= cma_get_id_stats
,
4330 .module
= THIS_MODULE
},
4333 static int cma_init_net(struct net
*net
)
4335 struct cma_pernet
*pernet
= cma_pernet(net
);
4337 idr_init(&pernet
->tcp_ps
);
4338 idr_init(&pernet
->udp_ps
);
4339 idr_init(&pernet
->ipoib_ps
);
4340 idr_init(&pernet
->ib_ps
);
4345 static void cma_exit_net(struct net
*net
)
4347 struct cma_pernet
*pernet
= cma_pernet(net
);
4349 idr_destroy(&pernet
->tcp_ps
);
4350 idr_destroy(&pernet
->udp_ps
);
4351 idr_destroy(&pernet
->ipoib_ps
);
4352 idr_destroy(&pernet
->ib_ps
);
4355 static struct pernet_operations cma_pernet_operations
= {
4356 .init
= cma_init_net
,
4357 .exit
= cma_exit_net
,
4358 .id
= &cma_pernet_id
,
4359 .size
= sizeof(struct cma_pernet
),
4362 static int __init
cma_init(void)
4366 cma_wq
= create_singlethread_workqueue("rdma_cm");
4370 ret
= register_pernet_subsys(&cma_pernet_operations
);
4374 ib_sa_register_client(&sa_client
);
4375 rdma_addr_register_client(&addr_client
);
4376 register_netdevice_notifier(&cma_nb
);
4378 ret
= ib_register_client(&cma_client
);
4382 if (ibnl_add_client(RDMA_NL_RDMA_CM
, ARRAY_SIZE(cma_cb_table
),
4384 pr_warn("RDMA CMA: failed to add netlink callback\n");
4385 cma_configfs_init();
4390 unregister_netdevice_notifier(&cma_nb
);
4391 rdma_addr_unregister_client(&addr_client
);
4392 ib_sa_unregister_client(&sa_client
);
4394 destroy_workqueue(cma_wq
);
4398 static void __exit
cma_cleanup(void)
4400 cma_configfs_exit();
4401 ibnl_remove_client(RDMA_NL_RDMA_CM
);
4402 ib_unregister_client(&cma_client
);
4403 unregister_netdevice_notifier(&cma_nb
);
4404 rdma_addr_unregister_client(&addr_client
);
4405 ib_sa_unregister_client(&sa_client
);
4406 unregister_pernet_subsys(&cma_pernet_operations
);
4407 destroy_workqueue(cma_wq
);
4410 module_init(cma_init
);
4411 module_exit(cma_cleanup
);