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_MAX_CM_RETRIES 15
72 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
73 #define CMA_IBOE_PACKET_LIFETIME 18
75 static const char * const cma_events
[] = {
76 [RDMA_CM_EVENT_ADDR_RESOLVED
] = "address resolved",
77 [RDMA_CM_EVENT_ADDR_ERROR
] = "address error",
78 [RDMA_CM_EVENT_ROUTE_RESOLVED
] = "route resolved ",
79 [RDMA_CM_EVENT_ROUTE_ERROR
] = "route error",
80 [RDMA_CM_EVENT_CONNECT_REQUEST
] = "connect request",
81 [RDMA_CM_EVENT_CONNECT_RESPONSE
] = "connect response",
82 [RDMA_CM_EVENT_CONNECT_ERROR
] = "connect error",
83 [RDMA_CM_EVENT_UNREACHABLE
] = "unreachable",
84 [RDMA_CM_EVENT_REJECTED
] = "rejected",
85 [RDMA_CM_EVENT_ESTABLISHED
] = "established",
86 [RDMA_CM_EVENT_DISCONNECTED
] = "disconnected",
87 [RDMA_CM_EVENT_DEVICE_REMOVAL
] = "device removal",
88 [RDMA_CM_EVENT_MULTICAST_JOIN
] = "multicast join",
89 [RDMA_CM_EVENT_MULTICAST_ERROR
] = "multicast error",
90 [RDMA_CM_EVENT_ADDR_CHANGE
] = "address change",
91 [RDMA_CM_EVENT_TIMEWAIT_EXIT
] = "timewait exit",
94 const char *__attribute_const__
rdma_event_msg(enum rdma_cm_event_type event
)
98 return (index
< ARRAY_SIZE(cma_events
) && cma_events
[index
]) ?
99 cma_events
[index
] : "unrecognized event";
101 EXPORT_SYMBOL(rdma_event_msg
);
103 static void cma_add_one(struct ib_device
*device
);
104 static void cma_remove_one(struct ib_device
*device
, void *client_data
);
106 static struct ib_client cma_client
= {
109 .remove
= cma_remove_one
112 static struct ib_sa_client sa_client
;
113 static struct rdma_addr_client addr_client
;
114 static LIST_HEAD(dev_list
);
115 static LIST_HEAD(listen_any_list
);
116 static DEFINE_MUTEX(lock
);
117 static struct workqueue_struct
*cma_wq
;
118 static int cma_pernet_id
;
127 static struct cma_pernet
*cma_pernet(struct net
*net
)
129 return net_generic(net
, cma_pernet_id
);
132 static struct idr
*cma_pernet_idr(struct net
*net
, enum rdma_port_space ps
)
134 struct cma_pernet
*pernet
= cma_pernet(net
);
138 return &pernet
->tcp_ps
;
140 return &pernet
->udp_ps
;
142 return &pernet
->ipoib_ps
;
144 return &pernet
->ib_ps
;
151 struct list_head list
;
152 struct ib_device
*device
;
153 struct completion comp
;
155 struct list_head id_list
;
156 enum ib_gid_type
*default_gid_type
;
159 struct rdma_bind_list
{
160 enum rdma_port_space ps
;
161 struct hlist_head owners
;
165 static int cma_ps_alloc(struct net
*net
, enum rdma_port_space ps
,
166 struct rdma_bind_list
*bind_list
, int snum
)
168 struct idr
*idr
= cma_pernet_idr(net
, ps
);
170 return idr_alloc(idr
, bind_list
, snum
, snum
+ 1, GFP_KERNEL
);
173 static struct rdma_bind_list
*cma_ps_find(struct net
*net
,
174 enum rdma_port_space ps
, int snum
)
176 struct idr
*idr
= cma_pernet_idr(net
, ps
);
178 return idr_find(idr
, snum
);
181 static void cma_ps_remove(struct net
*net
, enum rdma_port_space ps
, int snum
)
183 struct idr
*idr
= cma_pernet_idr(net
, ps
);
185 idr_remove(idr
, snum
);
192 void cma_ref_dev(struct cma_device
*cma_dev
)
194 atomic_inc(&cma_dev
->refcount
);
197 struct cma_device
*cma_enum_devices_by_ibdev(cma_device_filter filter
,
200 struct cma_device
*cma_dev
;
201 struct cma_device
*found_cma_dev
= NULL
;
205 list_for_each_entry(cma_dev
, &dev_list
, list
)
206 if (filter(cma_dev
->device
, cookie
)) {
207 found_cma_dev
= cma_dev
;
212 cma_ref_dev(found_cma_dev
);
214 return found_cma_dev
;
217 int cma_get_default_gid_type(struct cma_device
*cma_dev
,
220 if (port
< rdma_start_port(cma_dev
->device
) ||
221 port
> rdma_end_port(cma_dev
->device
))
224 return cma_dev
->default_gid_type
[port
- rdma_start_port(cma_dev
->device
)];
227 int cma_set_default_gid_type(struct cma_device
*cma_dev
,
229 enum ib_gid_type default_gid_type
)
231 unsigned long supported_gids
;
233 if (port
< rdma_start_port(cma_dev
->device
) ||
234 port
> rdma_end_port(cma_dev
->device
))
237 supported_gids
= roce_gid_type_mask_support(cma_dev
->device
, port
);
239 if (!(supported_gids
& 1 << default_gid_type
))
242 cma_dev
->default_gid_type
[port
- rdma_start_port(cma_dev
->device
)] =
248 struct ib_device
*cma_get_ib_dev(struct cma_device
*cma_dev
)
250 return cma_dev
->device
;
254 * Device removal can occur at anytime, so we need extra handling to
255 * serialize notifying the user of device removal with other callbacks.
256 * We do this by disabling removal notification while a callback is in process,
257 * and reporting it after the callback completes.
259 struct rdma_id_private
{
260 struct rdma_cm_id id
;
262 struct rdma_bind_list
*bind_list
;
263 struct hlist_node node
;
264 struct list_head list
; /* listen_any_list or cma_device.list */
265 struct list_head listen_list
; /* per device listens */
266 struct cma_device
*cma_dev
;
267 struct list_head mc_list
;
270 enum rdma_cm_state state
;
272 struct mutex qp_mutex
;
274 struct completion comp
;
276 struct mutex handler_mutex
;
280 struct ib_sa_query
*query
;
296 enum ib_gid_type gid_type
;
299 struct cma_multicast
{
300 struct rdma_id_private
*id_priv
;
302 struct ib_sa_multicast
*ib
;
304 struct list_head list
;
306 struct sockaddr_storage addr
;
312 struct work_struct work
;
313 struct rdma_id_private
*id
;
314 enum rdma_cm_state old_state
;
315 enum rdma_cm_state new_state
;
316 struct rdma_cm_event event
;
319 struct cma_ndev_work
{
320 struct work_struct work
;
321 struct rdma_id_private
*id
;
322 struct rdma_cm_event event
;
325 struct iboe_mcast_work
{
326 struct work_struct work
;
327 struct rdma_id_private
*id
;
328 struct cma_multicast
*mc
;
341 u8 ip_version
; /* IP version: 7:4 */
343 union cma_ip_addr src_addr
;
344 union cma_ip_addr dst_addr
;
347 #define CMA_VERSION 0x00
349 struct cma_req_info
{
350 struct ib_device
*device
;
352 union ib_gid local_gid
;
358 static int cma_comp(struct rdma_id_private
*id_priv
, enum rdma_cm_state comp
)
363 spin_lock_irqsave(&id_priv
->lock
, flags
);
364 ret
= (id_priv
->state
== comp
);
365 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
369 static int cma_comp_exch(struct rdma_id_private
*id_priv
,
370 enum rdma_cm_state comp
, enum rdma_cm_state exch
)
375 spin_lock_irqsave(&id_priv
->lock
, flags
);
376 if ((ret
= (id_priv
->state
== comp
)))
377 id_priv
->state
= exch
;
378 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
382 static enum rdma_cm_state
cma_exch(struct rdma_id_private
*id_priv
,
383 enum rdma_cm_state exch
)
386 enum rdma_cm_state old
;
388 spin_lock_irqsave(&id_priv
->lock
, flags
);
389 old
= id_priv
->state
;
390 id_priv
->state
= exch
;
391 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
395 static inline u8
cma_get_ip_ver(const struct cma_hdr
*hdr
)
397 return hdr
->ip_version
>> 4;
400 static inline void cma_set_ip_ver(struct cma_hdr
*hdr
, u8 ip_ver
)
402 hdr
->ip_version
= (ip_ver
<< 4) | (hdr
->ip_version
& 0xF);
405 static int cma_igmp_send(struct net_device
*ndev
, union ib_gid
*mgid
, bool join
)
407 struct in_device
*in_dev
= NULL
;
411 in_dev
= __in_dev_get_rtnl(ndev
);
414 ip_mc_inc_group(in_dev
,
415 *(__be32
*)(mgid
->raw
+ 12));
417 ip_mc_dec_group(in_dev
,
418 *(__be32
*)(mgid
->raw
+ 12));
422 return (in_dev
) ? 0 : -ENODEV
;
425 static void _cma_attach_to_dev(struct rdma_id_private
*id_priv
,
426 struct cma_device
*cma_dev
)
428 cma_ref_dev(cma_dev
);
429 id_priv
->cma_dev
= cma_dev
;
430 id_priv
->gid_type
= 0;
431 id_priv
->id
.device
= cma_dev
->device
;
432 id_priv
->id
.route
.addr
.dev_addr
.transport
=
433 rdma_node_get_transport(cma_dev
->device
->node_type
);
434 list_add_tail(&id_priv
->list
, &cma_dev
->id_list
);
437 static void cma_attach_to_dev(struct rdma_id_private
*id_priv
,
438 struct cma_device
*cma_dev
)
440 _cma_attach_to_dev(id_priv
, cma_dev
);
442 cma_dev
->default_gid_type
[id_priv
->id
.port_num
-
443 rdma_start_port(cma_dev
->device
)];
446 void cma_deref_dev(struct cma_device
*cma_dev
)
448 if (atomic_dec_and_test(&cma_dev
->refcount
))
449 complete(&cma_dev
->comp
);
452 static inline void release_mc(struct kref
*kref
)
454 struct cma_multicast
*mc
= container_of(kref
, struct cma_multicast
, mcref
);
456 kfree(mc
->multicast
.ib
);
460 static void cma_release_dev(struct rdma_id_private
*id_priv
)
463 list_del(&id_priv
->list
);
464 cma_deref_dev(id_priv
->cma_dev
);
465 id_priv
->cma_dev
= NULL
;
469 static inline struct sockaddr
*cma_src_addr(struct rdma_id_private
*id_priv
)
471 return (struct sockaddr
*) &id_priv
->id
.route
.addr
.src_addr
;
474 static inline struct sockaddr
*cma_dst_addr(struct rdma_id_private
*id_priv
)
476 return (struct sockaddr
*) &id_priv
->id
.route
.addr
.dst_addr
;
479 static inline unsigned short cma_family(struct rdma_id_private
*id_priv
)
481 return id_priv
->id
.route
.addr
.src_addr
.ss_family
;
484 static int cma_set_qkey(struct rdma_id_private
*id_priv
, u32 qkey
)
486 struct ib_sa_mcmember_rec rec
;
490 if (qkey
&& id_priv
->qkey
!= qkey
)
496 id_priv
->qkey
= qkey
;
500 switch (id_priv
->id
.ps
) {
503 id_priv
->qkey
= RDMA_UDP_QKEY
;
506 ib_addr_get_mgid(&id_priv
->id
.route
.addr
.dev_addr
, &rec
.mgid
);
507 ret
= ib_sa_get_mcmember_rec(id_priv
->id
.device
,
508 id_priv
->id
.port_num
, &rec
.mgid
,
511 id_priv
->qkey
= be32_to_cpu(rec
.qkey
);
519 static void cma_translate_ib(struct sockaddr_ib
*sib
, struct rdma_dev_addr
*dev_addr
)
521 dev_addr
->dev_type
= ARPHRD_INFINIBAND
;
522 rdma_addr_set_sgid(dev_addr
, (union ib_gid
*) &sib
->sib_addr
);
523 ib_addr_set_pkey(dev_addr
, ntohs(sib
->sib_pkey
));
526 static int cma_translate_addr(struct sockaddr
*addr
, struct rdma_dev_addr
*dev_addr
)
530 if (addr
->sa_family
!= AF_IB
) {
531 ret
= rdma_translate_ip(addr
, dev_addr
, NULL
);
533 cma_translate_ib((struct sockaddr_ib
*) addr
, dev_addr
);
540 static inline int cma_validate_port(struct ib_device
*device
, u8 port
,
541 enum ib_gid_type gid_type
,
542 union ib_gid
*gid
, int dev_type
,
546 struct net_device
*ndev
= NULL
;
548 if ((dev_type
== ARPHRD_INFINIBAND
) && !rdma_protocol_ib(device
, port
))
551 if ((dev_type
!= ARPHRD_INFINIBAND
) && rdma_protocol_ib(device
, port
))
554 if (dev_type
== ARPHRD_ETHER
&& rdma_protocol_roce(device
, port
)) {
555 ndev
= dev_get_by_index(&init_net
, bound_if_index
);
556 if (ndev
&& ndev
->flags
& IFF_LOOPBACK
) {
557 pr_info("detected loopback device\n");
560 if (!device
->get_netdev
)
563 ndev
= device
->get_netdev(device
, port
);
568 gid_type
= IB_GID_TYPE_IB
;
571 ret
= ib_find_cached_gid_by_port(device
, gid
, gid_type
, port
,
580 static int cma_acquire_dev(struct rdma_id_private
*id_priv
,
581 struct rdma_id_private
*listen_id_priv
)
583 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
584 struct cma_device
*cma_dev
;
585 union ib_gid gid
, iboe_gid
, *gidp
;
589 if (dev_addr
->dev_type
!= ARPHRD_INFINIBAND
&&
590 id_priv
->id
.ps
== RDMA_PS_IPOIB
)
594 rdma_ip2gid((struct sockaddr
*)&id_priv
->id
.route
.addr
.src_addr
,
597 memcpy(&gid
, dev_addr
->src_dev_addr
+
598 rdma_addr_gid_offset(dev_addr
), sizeof gid
);
600 if (listen_id_priv
) {
601 cma_dev
= listen_id_priv
->cma_dev
;
602 port
= listen_id_priv
->id
.port_num
;
603 gidp
= rdma_protocol_roce(cma_dev
->device
, port
) ?
606 ret
= cma_validate_port(cma_dev
->device
, port
,
607 rdma_protocol_ib(cma_dev
->device
, port
) ?
609 listen_id_priv
->gid_type
, gidp
,
611 dev_addr
->bound_dev_if
);
613 id_priv
->id
.port_num
= port
;
618 list_for_each_entry(cma_dev
, &dev_list
, list
) {
619 for (port
= 1; port
<= cma_dev
->device
->phys_port_cnt
; ++port
) {
620 if (listen_id_priv
&&
621 listen_id_priv
->cma_dev
== cma_dev
&&
622 listen_id_priv
->id
.port_num
== port
)
625 gidp
= rdma_protocol_roce(cma_dev
->device
, port
) ?
628 ret
= cma_validate_port(cma_dev
->device
, port
,
629 rdma_protocol_ib(cma_dev
->device
, port
) ?
631 cma_dev
->default_gid_type
[port
- 1],
632 gidp
, dev_addr
->dev_type
,
633 dev_addr
->bound_dev_if
);
635 id_priv
->id
.port_num
= port
;
643 cma_attach_to_dev(id_priv
, cma_dev
);
650 * Select the source IB device and address to reach the destination IB address.
652 static int cma_resolve_ib_dev(struct rdma_id_private
*id_priv
)
654 struct cma_device
*cma_dev
, *cur_dev
;
655 struct sockaddr_ib
*addr
;
656 union ib_gid gid
, sgid
, *dgid
;
662 addr
= (struct sockaddr_ib
*) cma_dst_addr(id_priv
);
663 dgid
= (union ib_gid
*) &addr
->sib_addr
;
664 pkey
= ntohs(addr
->sib_pkey
);
666 list_for_each_entry(cur_dev
, &dev_list
, list
) {
667 for (p
= 1; p
<= cur_dev
->device
->phys_port_cnt
; ++p
) {
668 if (!rdma_cap_af_ib(cur_dev
->device
, p
))
671 if (ib_find_cached_pkey(cur_dev
->device
, p
, pkey
, &index
))
674 for (i
= 0; !ib_get_cached_gid(cur_dev
->device
, p
, i
,
677 if (!memcmp(&gid
, dgid
, sizeof(gid
))) {
680 id_priv
->id
.port_num
= p
;
684 if (!cma_dev
&& (gid
.global
.subnet_prefix
==
685 dgid
->global
.subnet_prefix
)) {
688 id_priv
->id
.port_num
= p
;
698 cma_attach_to_dev(id_priv
, cma_dev
);
699 addr
= (struct sockaddr_ib
*) cma_src_addr(id_priv
);
700 memcpy(&addr
->sib_addr
, &sgid
, sizeof sgid
);
701 cma_translate_ib(addr
, &id_priv
->id
.route
.addr
.dev_addr
);
705 static void cma_deref_id(struct rdma_id_private
*id_priv
)
707 if (atomic_dec_and_test(&id_priv
->refcount
))
708 complete(&id_priv
->comp
);
711 static int cma_disable_callback(struct rdma_id_private
*id_priv
,
712 enum rdma_cm_state state
)
714 mutex_lock(&id_priv
->handler_mutex
);
715 if (id_priv
->state
!= state
) {
716 mutex_unlock(&id_priv
->handler_mutex
);
722 struct rdma_cm_id
*rdma_create_id(struct net
*net
,
723 rdma_cm_event_handler event_handler
,
724 void *context
, enum rdma_port_space ps
,
725 enum ib_qp_type qp_type
)
727 struct rdma_id_private
*id_priv
;
729 id_priv
= kzalloc(sizeof *id_priv
, GFP_KERNEL
);
731 return ERR_PTR(-ENOMEM
);
733 id_priv
->owner
= task_pid_nr(current
);
734 id_priv
->state
= RDMA_CM_IDLE
;
735 id_priv
->id
.context
= context
;
736 id_priv
->id
.event_handler
= event_handler
;
738 id_priv
->id
.qp_type
= qp_type
;
739 spin_lock_init(&id_priv
->lock
);
740 mutex_init(&id_priv
->qp_mutex
);
741 init_completion(&id_priv
->comp
);
742 atomic_set(&id_priv
->refcount
, 1);
743 mutex_init(&id_priv
->handler_mutex
);
744 INIT_LIST_HEAD(&id_priv
->listen_list
);
745 INIT_LIST_HEAD(&id_priv
->mc_list
);
746 get_random_bytes(&id_priv
->seq_num
, sizeof id_priv
->seq_num
);
747 id_priv
->id
.route
.addr
.dev_addr
.net
= get_net(net
);
751 EXPORT_SYMBOL(rdma_create_id
);
753 static int cma_init_ud_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
755 struct ib_qp_attr qp_attr
;
756 int qp_attr_mask
, ret
;
758 qp_attr
.qp_state
= IB_QPS_INIT
;
759 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
763 ret
= ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
767 qp_attr
.qp_state
= IB_QPS_RTR
;
768 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
);
772 qp_attr
.qp_state
= IB_QPS_RTS
;
774 ret
= ib_modify_qp(qp
, &qp_attr
, IB_QP_STATE
| IB_QP_SQ_PSN
);
779 static int cma_init_conn_qp(struct rdma_id_private
*id_priv
, struct ib_qp
*qp
)
781 struct ib_qp_attr qp_attr
;
782 int qp_attr_mask
, ret
;
784 qp_attr
.qp_state
= IB_QPS_INIT
;
785 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
789 return ib_modify_qp(qp
, &qp_attr
, qp_attr_mask
);
792 int rdma_create_qp(struct rdma_cm_id
*id
, struct ib_pd
*pd
,
793 struct ib_qp_init_attr
*qp_init_attr
)
795 struct rdma_id_private
*id_priv
;
799 id_priv
= container_of(id
, struct rdma_id_private
, id
);
800 if (id
->device
!= pd
->device
)
803 qp_init_attr
->port_num
= id
->port_num
;
804 qp
= ib_create_qp(pd
, qp_init_attr
);
808 if (id
->qp_type
== IB_QPT_UD
)
809 ret
= cma_init_ud_qp(id_priv
, qp
);
811 ret
= cma_init_conn_qp(id_priv
, qp
);
816 id_priv
->qp_num
= qp
->qp_num
;
817 id_priv
->srq
= (qp
->srq
!= NULL
);
823 EXPORT_SYMBOL(rdma_create_qp
);
825 void rdma_destroy_qp(struct rdma_cm_id
*id
)
827 struct rdma_id_private
*id_priv
;
829 id_priv
= container_of(id
, struct rdma_id_private
, id
);
830 mutex_lock(&id_priv
->qp_mutex
);
831 ib_destroy_qp(id_priv
->id
.qp
);
832 id_priv
->id
.qp
= NULL
;
833 mutex_unlock(&id_priv
->qp_mutex
);
835 EXPORT_SYMBOL(rdma_destroy_qp
);
837 static int cma_modify_qp_rtr(struct rdma_id_private
*id_priv
,
838 struct rdma_conn_param
*conn_param
)
840 struct ib_qp_attr qp_attr
;
841 int qp_attr_mask
, ret
;
844 mutex_lock(&id_priv
->qp_mutex
);
845 if (!id_priv
->id
.qp
) {
850 /* Need to update QP attributes from default values. */
851 qp_attr
.qp_state
= IB_QPS_INIT
;
852 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
856 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
860 qp_attr
.qp_state
= IB_QPS_RTR
;
861 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
865 ret
= ib_query_gid(id_priv
->id
.device
, id_priv
->id
.port_num
,
866 qp_attr
.ah_attr
.grh
.sgid_index
, &sgid
, NULL
);
870 BUG_ON(id_priv
->cma_dev
->device
!= id_priv
->id
.device
);
873 qp_attr
.max_dest_rd_atomic
= conn_param
->responder_resources
;
874 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
876 mutex_unlock(&id_priv
->qp_mutex
);
880 static int cma_modify_qp_rts(struct rdma_id_private
*id_priv
,
881 struct rdma_conn_param
*conn_param
)
883 struct ib_qp_attr qp_attr
;
884 int qp_attr_mask
, ret
;
886 mutex_lock(&id_priv
->qp_mutex
);
887 if (!id_priv
->id
.qp
) {
892 qp_attr
.qp_state
= IB_QPS_RTS
;
893 ret
= rdma_init_qp_attr(&id_priv
->id
, &qp_attr
, &qp_attr_mask
);
898 qp_attr
.max_rd_atomic
= conn_param
->initiator_depth
;
899 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, qp_attr_mask
);
901 mutex_unlock(&id_priv
->qp_mutex
);
905 static int cma_modify_qp_err(struct rdma_id_private
*id_priv
)
907 struct ib_qp_attr qp_attr
;
910 mutex_lock(&id_priv
->qp_mutex
);
911 if (!id_priv
->id
.qp
) {
916 qp_attr
.qp_state
= IB_QPS_ERR
;
917 ret
= ib_modify_qp(id_priv
->id
.qp
, &qp_attr
, IB_QP_STATE
);
919 mutex_unlock(&id_priv
->qp_mutex
);
923 static int cma_ib_init_qp_attr(struct rdma_id_private
*id_priv
,
924 struct ib_qp_attr
*qp_attr
, int *qp_attr_mask
)
926 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
930 if (rdma_cap_eth_ah(id_priv
->id
.device
, id_priv
->id
.port_num
))
933 pkey
= ib_addr_get_pkey(dev_addr
);
935 ret
= ib_find_cached_pkey(id_priv
->id
.device
, id_priv
->id
.port_num
,
936 pkey
, &qp_attr
->pkey_index
);
940 qp_attr
->port_num
= id_priv
->id
.port_num
;
941 *qp_attr_mask
= IB_QP_STATE
| IB_QP_PKEY_INDEX
| IB_QP_PORT
;
943 if (id_priv
->id
.qp_type
== IB_QPT_UD
) {
944 ret
= cma_set_qkey(id_priv
, 0);
948 qp_attr
->qkey
= id_priv
->qkey
;
949 *qp_attr_mask
|= IB_QP_QKEY
;
951 qp_attr
->qp_access_flags
= 0;
952 *qp_attr_mask
|= IB_QP_ACCESS_FLAGS
;
957 int rdma_init_qp_attr(struct rdma_cm_id
*id
, struct ib_qp_attr
*qp_attr
,
960 struct rdma_id_private
*id_priv
;
963 id_priv
= container_of(id
, struct rdma_id_private
, id
);
964 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
965 if (!id_priv
->cm_id
.ib
|| (id_priv
->id
.qp_type
== IB_QPT_UD
))
966 ret
= cma_ib_init_qp_attr(id_priv
, qp_attr
, qp_attr_mask
);
968 ret
= ib_cm_init_qp_attr(id_priv
->cm_id
.ib
, qp_attr
,
971 if (qp_attr
->qp_state
== IB_QPS_RTR
)
972 qp_attr
->rq_psn
= id_priv
->seq_num
;
973 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
)) {
974 if (!id_priv
->cm_id
.iw
) {
975 qp_attr
->qp_access_flags
= 0;
976 *qp_attr_mask
= IB_QP_STATE
| IB_QP_ACCESS_FLAGS
;
978 ret
= iw_cm_init_qp_attr(id_priv
->cm_id
.iw
, qp_attr
,
985 EXPORT_SYMBOL(rdma_init_qp_attr
);
987 static inline int cma_zero_addr(struct sockaddr
*addr
)
989 switch (addr
->sa_family
) {
991 return ipv4_is_zeronet(((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
);
993 return ipv6_addr_any(&((struct sockaddr_in6
*) addr
)->sin6_addr
);
995 return ib_addr_any(&((struct sockaddr_ib
*) addr
)->sib_addr
);
1001 static inline int cma_loopback_addr(struct sockaddr
*addr
)
1003 switch (addr
->sa_family
) {
1005 return ipv4_is_loopback(((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
);
1007 return ipv6_addr_loopback(&((struct sockaddr_in6
*) addr
)->sin6_addr
);
1009 return ib_addr_loopback(&((struct sockaddr_ib
*) addr
)->sib_addr
);
1015 static inline int cma_any_addr(struct sockaddr
*addr
)
1017 return cma_zero_addr(addr
) || cma_loopback_addr(addr
);
1020 static int cma_addr_cmp(struct sockaddr
*src
, struct sockaddr
*dst
)
1022 if (src
->sa_family
!= dst
->sa_family
)
1025 switch (src
->sa_family
) {
1027 return ((struct sockaddr_in
*) src
)->sin_addr
.s_addr
!=
1028 ((struct sockaddr_in
*) dst
)->sin_addr
.s_addr
;
1030 return ipv6_addr_cmp(&((struct sockaddr_in6
*) src
)->sin6_addr
,
1031 &((struct sockaddr_in6
*) dst
)->sin6_addr
);
1033 return ib_addr_cmp(&((struct sockaddr_ib
*) src
)->sib_addr
,
1034 &((struct sockaddr_ib
*) dst
)->sib_addr
);
1038 static __be16
cma_port(struct sockaddr
*addr
)
1040 struct sockaddr_ib
*sib
;
1042 switch (addr
->sa_family
) {
1044 return ((struct sockaddr_in
*) addr
)->sin_port
;
1046 return ((struct sockaddr_in6
*) addr
)->sin6_port
;
1048 sib
= (struct sockaddr_ib
*) addr
;
1049 return htons((u16
) (be64_to_cpu(sib
->sib_sid
) &
1050 be64_to_cpu(sib
->sib_sid_mask
)));
1056 static inline int cma_any_port(struct sockaddr
*addr
)
1058 return !cma_port(addr
);
1061 static void cma_save_ib_info(struct sockaddr
*src_addr
,
1062 struct sockaddr
*dst_addr
,
1063 struct rdma_cm_id
*listen_id
,
1064 struct ib_sa_path_rec
*path
)
1066 struct sockaddr_ib
*listen_ib
, *ib
;
1068 listen_ib
= (struct sockaddr_ib
*) &listen_id
->route
.addr
.src_addr
;
1070 ib
= (struct sockaddr_ib
*)src_addr
;
1071 ib
->sib_family
= AF_IB
;
1073 ib
->sib_pkey
= path
->pkey
;
1074 ib
->sib_flowinfo
= path
->flow_label
;
1075 memcpy(&ib
->sib_addr
, &path
->sgid
, 16);
1076 ib
->sib_sid
= path
->service_id
;
1077 ib
->sib_scope_id
= 0;
1079 ib
->sib_pkey
= listen_ib
->sib_pkey
;
1080 ib
->sib_flowinfo
= listen_ib
->sib_flowinfo
;
1081 ib
->sib_addr
= listen_ib
->sib_addr
;
1082 ib
->sib_sid
= listen_ib
->sib_sid
;
1083 ib
->sib_scope_id
= listen_ib
->sib_scope_id
;
1085 ib
->sib_sid_mask
= cpu_to_be64(0xffffffffffffffffULL
);
1088 ib
= (struct sockaddr_ib
*)dst_addr
;
1089 ib
->sib_family
= AF_IB
;
1091 ib
->sib_pkey
= path
->pkey
;
1092 ib
->sib_flowinfo
= path
->flow_label
;
1093 memcpy(&ib
->sib_addr
, &path
->dgid
, 16);
1098 static void cma_save_ip4_info(struct sockaddr
*src_addr
,
1099 struct sockaddr
*dst_addr
,
1100 struct cma_hdr
*hdr
,
1103 struct sockaddr_in
*ip4
;
1106 ip4
= (struct sockaddr_in
*)src_addr
;
1107 ip4
->sin_family
= AF_INET
;
1108 ip4
->sin_addr
.s_addr
= hdr
->dst_addr
.ip4
.addr
;
1109 ip4
->sin_port
= local_port
;
1113 ip4
= (struct sockaddr_in
*)dst_addr
;
1114 ip4
->sin_family
= AF_INET
;
1115 ip4
->sin_addr
.s_addr
= hdr
->src_addr
.ip4
.addr
;
1116 ip4
->sin_port
= hdr
->port
;
1120 static void cma_save_ip6_info(struct sockaddr
*src_addr
,
1121 struct sockaddr
*dst_addr
,
1122 struct cma_hdr
*hdr
,
1125 struct sockaddr_in6
*ip6
;
1128 ip6
= (struct sockaddr_in6
*)src_addr
;
1129 ip6
->sin6_family
= AF_INET6
;
1130 ip6
->sin6_addr
= hdr
->dst_addr
.ip6
;
1131 ip6
->sin6_port
= local_port
;
1135 ip6
= (struct sockaddr_in6
*)dst_addr
;
1136 ip6
->sin6_family
= AF_INET6
;
1137 ip6
->sin6_addr
= hdr
->src_addr
.ip6
;
1138 ip6
->sin6_port
= hdr
->port
;
1142 static u16
cma_port_from_service_id(__be64 service_id
)
1144 return (u16
)be64_to_cpu(service_id
);
1147 static int cma_save_ip_info(struct sockaddr
*src_addr
,
1148 struct sockaddr
*dst_addr
,
1149 struct ib_cm_event
*ib_event
,
1152 struct cma_hdr
*hdr
;
1155 hdr
= ib_event
->private_data
;
1156 if (hdr
->cma_version
!= CMA_VERSION
)
1159 port
= htons(cma_port_from_service_id(service_id
));
1161 switch (cma_get_ip_ver(hdr
)) {
1163 cma_save_ip4_info(src_addr
, dst_addr
, hdr
, port
);
1166 cma_save_ip6_info(src_addr
, dst_addr
, hdr
, port
);
1169 return -EAFNOSUPPORT
;
1175 static int cma_save_net_info(struct sockaddr
*src_addr
,
1176 struct sockaddr
*dst_addr
,
1177 struct rdma_cm_id
*listen_id
,
1178 struct ib_cm_event
*ib_event
,
1179 sa_family_t sa_family
, __be64 service_id
)
1181 if (sa_family
== AF_IB
) {
1182 if (ib_event
->event
== IB_CM_REQ_RECEIVED
)
1183 cma_save_ib_info(src_addr
, dst_addr
, listen_id
,
1184 ib_event
->param
.req_rcvd
.primary_path
);
1185 else if (ib_event
->event
== IB_CM_SIDR_REQ_RECEIVED
)
1186 cma_save_ib_info(src_addr
, dst_addr
, listen_id
, NULL
);
1190 return cma_save_ip_info(src_addr
, dst_addr
, ib_event
, service_id
);
1193 static int cma_save_req_info(const struct ib_cm_event
*ib_event
,
1194 struct cma_req_info
*req
)
1196 const struct ib_cm_req_event_param
*req_param
=
1197 &ib_event
->param
.req_rcvd
;
1198 const struct ib_cm_sidr_req_event_param
*sidr_param
=
1199 &ib_event
->param
.sidr_req_rcvd
;
1201 switch (ib_event
->event
) {
1202 case IB_CM_REQ_RECEIVED
:
1203 req
->device
= req_param
->listen_id
->device
;
1204 req
->port
= req_param
->port
;
1205 memcpy(&req
->local_gid
, &req_param
->primary_path
->sgid
,
1206 sizeof(req
->local_gid
));
1207 req
->has_gid
= true;
1208 req
->service_id
= req_param
->primary_path
->service_id
;
1209 req
->pkey
= be16_to_cpu(req_param
->primary_path
->pkey
);
1210 if (req
->pkey
!= req_param
->bth_pkey
)
1211 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1212 "RDMA CMA: in the future this may cause the request to be dropped\n",
1213 req_param
->bth_pkey
, req
->pkey
);
1215 case IB_CM_SIDR_REQ_RECEIVED
:
1216 req
->device
= sidr_param
->listen_id
->device
;
1217 req
->port
= sidr_param
->port
;
1218 req
->has_gid
= false;
1219 req
->service_id
= sidr_param
->service_id
;
1220 req
->pkey
= sidr_param
->pkey
;
1221 if (req
->pkey
!= sidr_param
->bth_pkey
)
1222 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1223 "RDMA CMA: in the future this may cause the request to be dropped\n",
1224 sidr_param
->bth_pkey
, req
->pkey
);
1233 static bool validate_ipv4_net_dev(struct net_device
*net_dev
,
1234 const struct sockaddr_in
*dst_addr
,
1235 const struct sockaddr_in
*src_addr
)
1237 __be32 daddr
= dst_addr
->sin_addr
.s_addr
,
1238 saddr
= src_addr
->sin_addr
.s_addr
;
1239 struct fib_result res
;
1244 if (ipv4_is_multicast(saddr
) || ipv4_is_lbcast(saddr
) ||
1245 ipv4_is_lbcast(daddr
) || ipv4_is_zeronet(saddr
) ||
1246 ipv4_is_zeronet(daddr
) || ipv4_is_loopback(daddr
) ||
1247 ipv4_is_loopback(saddr
))
1250 memset(&fl4
, 0, sizeof(fl4
));
1251 fl4
.flowi4_iif
= net_dev
->ifindex
;
1256 err
= fib_lookup(dev_net(net_dev
), &fl4
, &res
, 0);
1257 ret
= err
== 0 && FIB_RES_DEV(res
) == net_dev
;
1263 static bool validate_ipv6_net_dev(struct net_device
*net_dev
,
1264 const struct sockaddr_in6
*dst_addr
,
1265 const struct sockaddr_in6
*src_addr
)
1267 #if IS_ENABLED(CONFIG_IPV6)
1268 const int strict
= ipv6_addr_type(&dst_addr
->sin6_addr
) &
1269 IPV6_ADDR_LINKLOCAL
;
1270 struct rt6_info
*rt
= rt6_lookup(dev_net(net_dev
), &dst_addr
->sin6_addr
,
1271 &src_addr
->sin6_addr
, net_dev
->ifindex
,
1278 ret
= rt
->rt6i_idev
->dev
== net_dev
;
1287 static bool validate_net_dev(struct net_device
*net_dev
,
1288 const struct sockaddr
*daddr
,
1289 const struct sockaddr
*saddr
)
1291 const struct sockaddr_in
*daddr4
= (const struct sockaddr_in
*)daddr
;
1292 const struct sockaddr_in
*saddr4
= (const struct sockaddr_in
*)saddr
;
1293 const struct sockaddr_in6
*daddr6
= (const struct sockaddr_in6
*)daddr
;
1294 const struct sockaddr_in6
*saddr6
= (const struct sockaddr_in6
*)saddr
;
1296 switch (daddr
->sa_family
) {
1298 return saddr
->sa_family
== AF_INET
&&
1299 validate_ipv4_net_dev(net_dev
, daddr4
, saddr4
);
1302 return saddr
->sa_family
== AF_INET6
&&
1303 validate_ipv6_net_dev(net_dev
, daddr6
, saddr6
);
1310 static struct net_device
*cma_get_net_dev(struct ib_cm_event
*ib_event
,
1311 const struct cma_req_info
*req
)
1313 struct sockaddr_storage listen_addr_storage
, src_addr_storage
;
1314 struct sockaddr
*listen_addr
= (struct sockaddr
*)&listen_addr_storage
,
1315 *src_addr
= (struct sockaddr
*)&src_addr_storage
;
1316 struct net_device
*net_dev
;
1317 const union ib_gid
*gid
= req
->has_gid
? &req
->local_gid
: NULL
;
1320 err
= cma_save_ip_info(listen_addr
, src_addr
, ib_event
,
1323 return ERR_PTR(err
);
1325 net_dev
= ib_get_net_dev_by_params(req
->device
, req
->port
, req
->pkey
,
1328 return ERR_PTR(-ENODEV
);
1330 if (!validate_net_dev(net_dev
, listen_addr
, src_addr
)) {
1332 return ERR_PTR(-EHOSTUNREACH
);
1338 static enum rdma_port_space
rdma_ps_from_service_id(__be64 service_id
)
1340 return (be64_to_cpu(service_id
) >> 16) & 0xffff;
1343 static bool cma_match_private_data(struct rdma_id_private
*id_priv
,
1344 const struct cma_hdr
*hdr
)
1346 struct sockaddr
*addr
= cma_src_addr(id_priv
);
1348 struct in6_addr ip6_addr
;
1350 if (cma_any_addr(addr
) && !id_priv
->afonly
)
1353 switch (addr
->sa_family
) {
1355 ip4_addr
= ((struct sockaddr_in
*)addr
)->sin_addr
.s_addr
;
1356 if (cma_get_ip_ver(hdr
) != 4)
1358 if (!cma_any_addr(addr
) &&
1359 hdr
->dst_addr
.ip4
.addr
!= ip4_addr
)
1363 ip6_addr
= ((struct sockaddr_in6
*)addr
)->sin6_addr
;
1364 if (cma_get_ip_ver(hdr
) != 6)
1366 if (!cma_any_addr(addr
) &&
1367 memcmp(&hdr
->dst_addr
.ip6
, &ip6_addr
, sizeof(ip6_addr
)))
1379 static bool cma_protocol_roce_dev_port(struct ib_device
*device
, int port_num
)
1381 enum rdma_link_layer ll
= rdma_port_get_link_layer(device
, port_num
);
1382 enum rdma_transport_type transport
=
1383 rdma_node_get_transport(device
->node_type
);
1385 return ll
== IB_LINK_LAYER_ETHERNET
&& transport
== RDMA_TRANSPORT_IB
;
1388 static bool cma_protocol_roce(const struct rdma_cm_id
*id
)
1390 struct ib_device
*device
= id
->device
;
1391 const int port_num
= id
->port_num
?: rdma_start_port(device
);
1393 return cma_protocol_roce_dev_port(device
, port_num
);
1396 static bool cma_match_net_dev(const struct rdma_cm_id
*id
,
1397 const struct net_device
*net_dev
,
1400 const struct rdma_addr
*addr
= &id
->route
.addr
;
1403 /* This request is an AF_IB request or a RoCE request */
1404 return (!id
->port_num
|| id
->port_num
== port_num
) &&
1405 (addr
->src_addr
.ss_family
== AF_IB
||
1406 cma_protocol_roce_dev_port(id
->device
, port_num
));
1408 return !addr
->dev_addr
.bound_dev_if
||
1409 (net_eq(dev_net(net_dev
), addr
->dev_addr
.net
) &&
1410 addr
->dev_addr
.bound_dev_if
== net_dev
->ifindex
);
1413 static struct rdma_id_private
*cma_find_listener(
1414 const struct rdma_bind_list
*bind_list
,
1415 const struct ib_cm_id
*cm_id
,
1416 const struct ib_cm_event
*ib_event
,
1417 const struct cma_req_info
*req
,
1418 const struct net_device
*net_dev
)
1420 struct rdma_id_private
*id_priv
, *id_priv_dev
;
1423 return ERR_PTR(-EINVAL
);
1425 hlist_for_each_entry(id_priv
, &bind_list
->owners
, node
) {
1426 if (cma_match_private_data(id_priv
, ib_event
->private_data
)) {
1427 if (id_priv
->id
.device
== cm_id
->device
&&
1428 cma_match_net_dev(&id_priv
->id
, net_dev
, req
->port
))
1430 list_for_each_entry(id_priv_dev
,
1431 &id_priv
->listen_list
,
1433 if (id_priv_dev
->id
.device
== cm_id
->device
&&
1434 cma_match_net_dev(&id_priv_dev
->id
, net_dev
, req
->port
))
1440 return ERR_PTR(-EINVAL
);
1443 static struct rdma_id_private
*cma_id_from_event(struct ib_cm_id
*cm_id
,
1444 struct ib_cm_event
*ib_event
,
1445 struct net_device
**net_dev
)
1447 struct cma_req_info req
;
1448 struct rdma_bind_list
*bind_list
;
1449 struct rdma_id_private
*id_priv
;
1452 err
= cma_save_req_info(ib_event
, &req
);
1454 return ERR_PTR(err
);
1456 *net_dev
= cma_get_net_dev(ib_event
, &req
);
1457 if (IS_ERR(*net_dev
)) {
1458 if (PTR_ERR(*net_dev
) == -EAFNOSUPPORT
) {
1459 /* Assuming the protocol is AF_IB */
1461 } else if (cma_protocol_roce_dev_port(req
.device
, req
.port
)) {
1462 /* TODO find the net dev matching the request parameters
1463 * through the RoCE GID table */
1466 return ERR_CAST(*net_dev
);
1470 bind_list
= cma_ps_find(*net_dev
? dev_net(*net_dev
) : &init_net
,
1471 rdma_ps_from_service_id(req
.service_id
),
1472 cma_port_from_service_id(req
.service_id
));
1473 id_priv
= cma_find_listener(bind_list
, cm_id
, ib_event
, &req
, *net_dev
);
1474 if (IS_ERR(id_priv
) && *net_dev
) {
1482 static inline int cma_user_data_offset(struct rdma_id_private
*id_priv
)
1484 return cma_family(id_priv
) == AF_IB
? 0 : sizeof(struct cma_hdr
);
1487 static void cma_cancel_route(struct rdma_id_private
*id_priv
)
1489 if (rdma_cap_ib_sa(id_priv
->id
.device
, id_priv
->id
.port_num
)) {
1491 ib_sa_cancel_query(id_priv
->query_id
, id_priv
->query
);
1495 static void cma_cancel_listens(struct rdma_id_private
*id_priv
)
1497 struct rdma_id_private
*dev_id_priv
;
1500 * Remove from listen_any_list to prevent added devices from spawning
1501 * additional listen requests.
1504 list_del(&id_priv
->list
);
1506 while (!list_empty(&id_priv
->listen_list
)) {
1507 dev_id_priv
= list_entry(id_priv
->listen_list
.next
,
1508 struct rdma_id_private
, listen_list
);
1509 /* sync with device removal to avoid duplicate destruction */
1510 list_del_init(&dev_id_priv
->list
);
1511 list_del(&dev_id_priv
->listen_list
);
1512 mutex_unlock(&lock
);
1514 rdma_destroy_id(&dev_id_priv
->id
);
1517 mutex_unlock(&lock
);
1520 static void cma_cancel_operation(struct rdma_id_private
*id_priv
,
1521 enum rdma_cm_state state
)
1524 case RDMA_CM_ADDR_QUERY
:
1525 rdma_addr_cancel(&id_priv
->id
.route
.addr
.dev_addr
);
1527 case RDMA_CM_ROUTE_QUERY
:
1528 cma_cancel_route(id_priv
);
1530 case RDMA_CM_LISTEN
:
1531 if (cma_any_addr(cma_src_addr(id_priv
)) && !id_priv
->cma_dev
)
1532 cma_cancel_listens(id_priv
);
1539 static void cma_release_port(struct rdma_id_private
*id_priv
)
1541 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
1542 struct net
*net
= id_priv
->id
.route
.addr
.dev_addr
.net
;
1548 hlist_del(&id_priv
->node
);
1549 if (hlist_empty(&bind_list
->owners
)) {
1550 cma_ps_remove(net
, bind_list
->ps
, bind_list
->port
);
1553 mutex_unlock(&lock
);
1556 static void cma_leave_mc_groups(struct rdma_id_private
*id_priv
)
1558 struct cma_multicast
*mc
;
1560 while (!list_empty(&id_priv
->mc_list
)) {
1561 mc
= container_of(id_priv
->mc_list
.next
,
1562 struct cma_multicast
, list
);
1563 list_del(&mc
->list
);
1564 if (rdma_cap_ib_mcast(id_priv
->cma_dev
->device
,
1565 id_priv
->id
.port_num
)) {
1566 ib_sa_free_multicast(mc
->multicast
.ib
);
1569 if (mc
->igmp_joined
) {
1570 struct rdma_dev_addr
*dev_addr
=
1571 &id_priv
->id
.route
.addr
.dev_addr
;
1572 struct net_device
*ndev
= NULL
;
1574 if (dev_addr
->bound_dev_if
)
1575 ndev
= dev_get_by_index(&init_net
,
1576 dev_addr
->bound_dev_if
);
1579 &mc
->multicast
.ib
->rec
.mgid
,
1584 kref_put(&mc
->mcref
, release_mc
);
1589 void rdma_destroy_id(struct rdma_cm_id
*id
)
1591 struct rdma_id_private
*id_priv
;
1592 enum rdma_cm_state state
;
1594 id_priv
= container_of(id
, struct rdma_id_private
, id
);
1595 state
= cma_exch(id_priv
, RDMA_CM_DESTROYING
);
1596 cma_cancel_operation(id_priv
, state
);
1599 * Wait for any active callback to finish. New callbacks will find
1600 * the id_priv state set to destroying and abort.
1602 mutex_lock(&id_priv
->handler_mutex
);
1603 mutex_unlock(&id_priv
->handler_mutex
);
1605 if (id_priv
->cma_dev
) {
1606 if (rdma_cap_ib_cm(id_priv
->id
.device
, 1)) {
1607 if (id_priv
->cm_id
.ib
)
1608 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
1609 } else if (rdma_cap_iw_cm(id_priv
->id
.device
, 1)) {
1610 if (id_priv
->cm_id
.iw
)
1611 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
1613 cma_leave_mc_groups(id_priv
);
1614 cma_release_dev(id_priv
);
1617 cma_release_port(id_priv
);
1618 cma_deref_id(id_priv
);
1619 wait_for_completion(&id_priv
->comp
);
1621 if (id_priv
->internal_id
)
1622 cma_deref_id(id_priv
->id
.context
);
1624 kfree(id_priv
->id
.route
.path_rec
);
1625 put_net(id_priv
->id
.route
.addr
.dev_addr
.net
);
1628 EXPORT_SYMBOL(rdma_destroy_id
);
1630 static int cma_rep_recv(struct rdma_id_private
*id_priv
)
1634 ret
= cma_modify_qp_rtr(id_priv
, NULL
);
1638 ret
= cma_modify_qp_rts(id_priv
, NULL
);
1642 ret
= ib_send_cm_rtu(id_priv
->cm_id
.ib
, NULL
, 0);
1648 cma_modify_qp_err(id_priv
);
1649 ib_send_cm_rej(id_priv
->cm_id
.ib
, IB_CM_REJ_CONSUMER_DEFINED
,
1654 static void cma_set_rep_event_data(struct rdma_cm_event
*event
,
1655 struct ib_cm_rep_event_param
*rep_data
,
1658 event
->param
.conn
.private_data
= private_data
;
1659 event
->param
.conn
.private_data_len
= IB_CM_REP_PRIVATE_DATA_SIZE
;
1660 event
->param
.conn
.responder_resources
= rep_data
->responder_resources
;
1661 event
->param
.conn
.initiator_depth
= rep_data
->initiator_depth
;
1662 event
->param
.conn
.flow_control
= rep_data
->flow_control
;
1663 event
->param
.conn
.rnr_retry_count
= rep_data
->rnr_retry_count
;
1664 event
->param
.conn
.srq
= rep_data
->srq
;
1665 event
->param
.conn
.qp_num
= rep_data
->remote_qpn
;
1668 static int cma_ib_handler(struct ib_cm_id
*cm_id
, struct ib_cm_event
*ib_event
)
1670 struct rdma_id_private
*id_priv
= cm_id
->context
;
1671 struct rdma_cm_event event
;
1674 if ((ib_event
->event
!= IB_CM_TIMEWAIT_EXIT
&&
1675 cma_disable_callback(id_priv
, RDMA_CM_CONNECT
)) ||
1676 (ib_event
->event
== IB_CM_TIMEWAIT_EXIT
&&
1677 cma_disable_callback(id_priv
, 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
;
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 if (cma_disable_callback(listen_id
, RDMA_CM_LISTEN
)) {
1888 ret
= -ECONNABORTED
;
1892 memset(&event
, 0, sizeof event
);
1893 offset
= cma_user_data_offset(listen_id
);
1894 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
1895 if (ib_event
->event
== IB_CM_SIDR_REQ_RECEIVED
) {
1896 conn_id
= cma_new_udp_id(&listen_id
->id
, ib_event
, net_dev
);
1897 event
.param
.ud
.private_data
= ib_event
->private_data
+ offset
;
1898 event
.param
.ud
.private_data_len
=
1899 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE
- offset
;
1901 conn_id
= cma_new_conn_id(&listen_id
->id
, ib_event
, net_dev
);
1902 cma_set_req_event_data(&event
, &ib_event
->param
.req_rcvd
,
1903 ib_event
->private_data
, offset
);
1910 mutex_lock_nested(&conn_id
->handler_mutex
, SINGLE_DEPTH_NESTING
);
1911 ret
= cma_acquire_dev(conn_id
, listen_id
);
1915 conn_id
->cm_id
.ib
= cm_id
;
1916 cm_id
->context
= conn_id
;
1917 cm_id
->cm_handler
= cma_ib_handler
;
1920 * Protect against the user destroying conn_id from another thread
1921 * until we're done accessing it.
1923 atomic_inc(&conn_id
->refcount
);
1924 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
1928 * Acquire mutex to prevent user executing rdma_destroy_id()
1929 * while we're accessing the cm_id.
1932 if (cma_comp(conn_id
, RDMA_CM_CONNECT
) &&
1933 (conn_id
->id
.qp_type
!= IB_QPT_UD
))
1934 ib_send_cm_mra(cm_id
, CMA_CM_MRA_SETTING
, NULL
, 0);
1935 mutex_unlock(&lock
);
1936 mutex_unlock(&conn_id
->handler_mutex
);
1937 mutex_unlock(&listen_id
->handler_mutex
);
1938 cma_deref_id(conn_id
);
1944 cma_deref_id(conn_id
);
1945 /* Destroy the CM ID by returning a non-zero value. */
1946 conn_id
->cm_id
.ib
= NULL
;
1948 cma_exch(conn_id
, RDMA_CM_DESTROYING
);
1949 mutex_unlock(&conn_id
->handler_mutex
);
1951 mutex_unlock(&listen_id
->handler_mutex
);
1953 rdma_destroy_id(&conn_id
->id
);
1962 __be64
rdma_get_service_id(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
1964 if (addr
->sa_family
== AF_IB
)
1965 return ((struct sockaddr_ib
*) addr
)->sib_sid
;
1967 return cpu_to_be64(((u64
)id
->ps
<< 16) + be16_to_cpu(cma_port(addr
)));
1969 EXPORT_SYMBOL(rdma_get_service_id
);
1971 static int cma_iw_handler(struct iw_cm_id
*iw_id
, struct iw_cm_event
*iw_event
)
1973 struct rdma_id_private
*id_priv
= iw_id
->context
;
1974 struct rdma_cm_event event
;
1976 struct sockaddr
*laddr
= (struct sockaddr
*)&iw_event
->local_addr
;
1977 struct sockaddr
*raddr
= (struct sockaddr
*)&iw_event
->remote_addr
;
1979 if (cma_disable_callback(id_priv
, RDMA_CM_CONNECT
))
1982 memset(&event
, 0, sizeof event
);
1983 switch (iw_event
->event
) {
1984 case IW_CM_EVENT_CLOSE
:
1985 event
.event
= RDMA_CM_EVENT_DISCONNECTED
;
1987 case IW_CM_EVENT_CONNECT_REPLY
:
1988 memcpy(cma_src_addr(id_priv
), laddr
,
1989 rdma_addr_size(laddr
));
1990 memcpy(cma_dst_addr(id_priv
), raddr
,
1991 rdma_addr_size(raddr
));
1992 switch (iw_event
->status
) {
1994 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
1995 event
.param
.conn
.initiator_depth
= iw_event
->ird
;
1996 event
.param
.conn
.responder_resources
= iw_event
->ord
;
2000 event
.event
= RDMA_CM_EVENT_REJECTED
;
2003 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
2006 event
.event
= RDMA_CM_EVENT_CONNECT_ERROR
;
2010 case IW_CM_EVENT_ESTABLISHED
:
2011 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
2012 event
.param
.conn
.initiator_depth
= iw_event
->ird
;
2013 event
.param
.conn
.responder_resources
= iw_event
->ord
;
2019 event
.status
= iw_event
->status
;
2020 event
.param
.conn
.private_data
= iw_event
->private_data
;
2021 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
2022 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
2024 /* Destroy the CM ID by returning a non-zero value. */
2025 id_priv
->cm_id
.iw
= NULL
;
2026 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
2027 mutex_unlock(&id_priv
->handler_mutex
);
2028 rdma_destroy_id(&id_priv
->id
);
2032 mutex_unlock(&id_priv
->handler_mutex
);
2036 static int iw_conn_req_handler(struct iw_cm_id
*cm_id
,
2037 struct iw_cm_event
*iw_event
)
2039 struct rdma_cm_id
*new_cm_id
;
2040 struct rdma_id_private
*listen_id
, *conn_id
;
2041 struct rdma_cm_event event
;
2043 struct sockaddr
*laddr
= (struct sockaddr
*)&iw_event
->local_addr
;
2044 struct sockaddr
*raddr
= (struct sockaddr
*)&iw_event
->remote_addr
;
2046 listen_id
= cm_id
->context
;
2047 if (cma_disable_callback(listen_id
, RDMA_CM_LISTEN
))
2048 return -ECONNABORTED
;
2050 /* Create a new RDMA id for the new IW CM ID */
2051 new_cm_id
= rdma_create_id(listen_id
->id
.route
.addr
.dev_addr
.net
,
2052 listen_id
->id
.event_handler
,
2053 listen_id
->id
.context
,
2054 RDMA_PS_TCP
, IB_QPT_RC
);
2055 if (IS_ERR(new_cm_id
)) {
2059 conn_id
= container_of(new_cm_id
, struct rdma_id_private
, id
);
2060 mutex_lock_nested(&conn_id
->handler_mutex
, SINGLE_DEPTH_NESTING
);
2061 conn_id
->state
= RDMA_CM_CONNECT
;
2063 ret
= rdma_translate_ip(laddr
, &conn_id
->id
.route
.addr
.dev_addr
, NULL
);
2065 mutex_unlock(&conn_id
->handler_mutex
);
2066 rdma_destroy_id(new_cm_id
);
2070 ret
= cma_acquire_dev(conn_id
, listen_id
);
2072 mutex_unlock(&conn_id
->handler_mutex
);
2073 rdma_destroy_id(new_cm_id
);
2077 conn_id
->cm_id
.iw
= cm_id
;
2078 cm_id
->context
= conn_id
;
2079 cm_id
->cm_handler
= cma_iw_handler
;
2081 memcpy(cma_src_addr(conn_id
), laddr
, rdma_addr_size(laddr
));
2082 memcpy(cma_dst_addr(conn_id
), raddr
, rdma_addr_size(raddr
));
2084 memset(&event
, 0, sizeof event
);
2085 event
.event
= RDMA_CM_EVENT_CONNECT_REQUEST
;
2086 event
.param
.conn
.private_data
= iw_event
->private_data
;
2087 event
.param
.conn
.private_data_len
= iw_event
->private_data_len
;
2088 event
.param
.conn
.initiator_depth
= iw_event
->ird
;
2089 event
.param
.conn
.responder_resources
= iw_event
->ord
;
2092 * Protect against the user destroying conn_id from another thread
2093 * until we're done accessing it.
2095 atomic_inc(&conn_id
->refcount
);
2096 ret
= conn_id
->id
.event_handler(&conn_id
->id
, &event
);
2098 /* User wants to destroy the CM ID */
2099 conn_id
->cm_id
.iw
= NULL
;
2100 cma_exch(conn_id
, RDMA_CM_DESTROYING
);
2101 mutex_unlock(&conn_id
->handler_mutex
);
2102 cma_deref_id(conn_id
);
2103 rdma_destroy_id(&conn_id
->id
);
2107 mutex_unlock(&conn_id
->handler_mutex
);
2108 cma_deref_id(conn_id
);
2111 mutex_unlock(&listen_id
->handler_mutex
);
2115 static int cma_ib_listen(struct rdma_id_private
*id_priv
)
2117 struct sockaddr
*addr
;
2118 struct ib_cm_id
*id
;
2121 addr
= cma_src_addr(id_priv
);
2122 svc_id
= rdma_get_service_id(&id_priv
->id
, addr
);
2123 id
= ib_cm_insert_listen(id_priv
->id
.device
, cma_req_handler
, svc_id
);
2126 id_priv
->cm_id
.ib
= id
;
2131 static int cma_iw_listen(struct rdma_id_private
*id_priv
, int backlog
)
2134 struct iw_cm_id
*id
;
2136 id
= iw_create_cm_id(id_priv
->id
.device
,
2137 iw_conn_req_handler
,
2142 id
->tos
= id_priv
->tos
;
2143 id_priv
->cm_id
.iw
= id
;
2145 memcpy(&id_priv
->cm_id
.iw
->local_addr
, cma_src_addr(id_priv
),
2146 rdma_addr_size(cma_src_addr(id_priv
)));
2148 ret
= iw_cm_listen(id_priv
->cm_id
.iw
, backlog
);
2151 iw_destroy_cm_id(id_priv
->cm_id
.iw
);
2152 id_priv
->cm_id
.iw
= NULL
;
2158 static int cma_listen_handler(struct rdma_cm_id
*id
,
2159 struct rdma_cm_event
*event
)
2161 struct rdma_id_private
*id_priv
= id
->context
;
2163 id
->context
= id_priv
->id
.context
;
2164 id
->event_handler
= id_priv
->id
.event_handler
;
2165 return id_priv
->id
.event_handler(id
, event
);
2168 static void cma_listen_on_dev(struct rdma_id_private
*id_priv
,
2169 struct cma_device
*cma_dev
)
2171 struct rdma_id_private
*dev_id_priv
;
2172 struct rdma_cm_id
*id
;
2173 struct net
*net
= id_priv
->id
.route
.addr
.dev_addr
.net
;
2176 if (cma_family(id_priv
) == AF_IB
&& !rdma_cap_ib_cm(cma_dev
->device
, 1))
2179 id
= rdma_create_id(net
, cma_listen_handler
, id_priv
, id_priv
->id
.ps
,
2180 id_priv
->id
.qp_type
);
2184 dev_id_priv
= container_of(id
, struct rdma_id_private
, id
);
2186 dev_id_priv
->state
= RDMA_CM_ADDR_BOUND
;
2187 memcpy(cma_src_addr(dev_id_priv
), cma_src_addr(id_priv
),
2188 rdma_addr_size(cma_src_addr(id_priv
)));
2190 _cma_attach_to_dev(dev_id_priv
, cma_dev
);
2191 list_add_tail(&dev_id_priv
->listen_list
, &id_priv
->listen_list
);
2192 atomic_inc(&id_priv
->refcount
);
2193 dev_id_priv
->internal_id
= 1;
2194 dev_id_priv
->afonly
= id_priv
->afonly
;
2196 ret
= rdma_listen(id
, id_priv
->backlog
);
2198 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2199 ret
, cma_dev
->device
->name
);
2202 static void cma_listen_on_all(struct rdma_id_private
*id_priv
)
2204 struct cma_device
*cma_dev
;
2207 list_add_tail(&id_priv
->list
, &listen_any_list
);
2208 list_for_each_entry(cma_dev
, &dev_list
, list
)
2209 cma_listen_on_dev(id_priv
, cma_dev
);
2210 mutex_unlock(&lock
);
2213 void rdma_set_service_type(struct rdma_cm_id
*id
, int tos
)
2215 struct rdma_id_private
*id_priv
;
2217 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2218 id_priv
->tos
= (u8
) tos
;
2220 EXPORT_SYMBOL(rdma_set_service_type
);
2222 static void cma_query_handler(int status
, struct ib_sa_path_rec
*path_rec
,
2225 struct cma_work
*work
= context
;
2226 struct rdma_route
*route
;
2228 route
= &work
->id
->id
.route
;
2231 route
->num_paths
= 1;
2232 *route
->path_rec
= *path_rec
;
2234 work
->old_state
= RDMA_CM_ROUTE_QUERY
;
2235 work
->new_state
= RDMA_CM_ADDR_RESOLVED
;
2236 work
->event
.event
= RDMA_CM_EVENT_ROUTE_ERROR
;
2237 work
->event
.status
= status
;
2240 queue_work(cma_wq
, &work
->work
);
2243 static int cma_query_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
,
2244 struct cma_work
*work
)
2246 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
2247 struct ib_sa_path_rec path_rec
;
2248 ib_sa_comp_mask comp_mask
;
2249 struct sockaddr_in6
*sin6
;
2250 struct sockaddr_ib
*sib
;
2252 memset(&path_rec
, 0, sizeof path_rec
);
2253 rdma_addr_get_sgid(dev_addr
, &path_rec
.sgid
);
2254 rdma_addr_get_dgid(dev_addr
, &path_rec
.dgid
);
2255 path_rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(dev_addr
));
2256 path_rec
.numb_path
= 1;
2257 path_rec
.reversible
= 1;
2258 path_rec
.service_id
= rdma_get_service_id(&id_priv
->id
, cma_dst_addr(id_priv
));
2260 comp_mask
= IB_SA_PATH_REC_DGID
| IB_SA_PATH_REC_SGID
|
2261 IB_SA_PATH_REC_PKEY
| IB_SA_PATH_REC_NUMB_PATH
|
2262 IB_SA_PATH_REC_REVERSIBLE
| IB_SA_PATH_REC_SERVICE_ID
;
2264 switch (cma_family(id_priv
)) {
2266 path_rec
.qos_class
= cpu_to_be16((u16
) id_priv
->tos
);
2267 comp_mask
|= IB_SA_PATH_REC_QOS_CLASS
;
2270 sin6
= (struct sockaddr_in6
*) cma_src_addr(id_priv
);
2271 path_rec
.traffic_class
= (u8
) (be32_to_cpu(sin6
->sin6_flowinfo
) >> 20);
2272 comp_mask
|= IB_SA_PATH_REC_TRAFFIC_CLASS
;
2275 sib
= (struct sockaddr_ib
*) cma_src_addr(id_priv
);
2276 path_rec
.traffic_class
= (u8
) (be32_to_cpu(sib
->sib_flowinfo
) >> 20);
2277 comp_mask
|= IB_SA_PATH_REC_TRAFFIC_CLASS
;
2281 id_priv
->query_id
= ib_sa_path_rec_get(&sa_client
, id_priv
->id
.device
,
2282 id_priv
->id
.port_num
, &path_rec
,
2283 comp_mask
, timeout_ms
,
2284 GFP_KERNEL
, cma_query_handler
,
2285 work
, &id_priv
->query
);
2287 return (id_priv
->query_id
< 0) ? id_priv
->query_id
: 0;
2290 static void cma_work_handler(struct work_struct
*_work
)
2292 struct cma_work
*work
= container_of(_work
, struct cma_work
, work
);
2293 struct rdma_id_private
*id_priv
= work
->id
;
2296 mutex_lock(&id_priv
->handler_mutex
);
2297 if (!cma_comp_exch(id_priv
, work
->old_state
, work
->new_state
))
2300 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
2301 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
2305 mutex_unlock(&id_priv
->handler_mutex
);
2306 cma_deref_id(id_priv
);
2308 rdma_destroy_id(&id_priv
->id
);
2312 static void cma_ndev_work_handler(struct work_struct
*_work
)
2314 struct cma_ndev_work
*work
= container_of(_work
, struct cma_ndev_work
, work
);
2315 struct rdma_id_private
*id_priv
= work
->id
;
2318 mutex_lock(&id_priv
->handler_mutex
);
2319 if (id_priv
->state
== RDMA_CM_DESTROYING
||
2320 id_priv
->state
== RDMA_CM_DEVICE_REMOVAL
)
2323 if (id_priv
->id
.event_handler(&id_priv
->id
, &work
->event
)) {
2324 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
2329 mutex_unlock(&id_priv
->handler_mutex
);
2330 cma_deref_id(id_priv
);
2332 rdma_destroy_id(&id_priv
->id
);
2336 static int cma_resolve_ib_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
2338 struct rdma_route
*route
= &id_priv
->id
.route
;
2339 struct cma_work
*work
;
2342 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2347 INIT_WORK(&work
->work
, cma_work_handler
);
2348 work
->old_state
= RDMA_CM_ROUTE_QUERY
;
2349 work
->new_state
= RDMA_CM_ROUTE_RESOLVED
;
2350 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
2352 route
->path_rec
= kmalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
2353 if (!route
->path_rec
) {
2358 ret
= cma_query_ib_route(id_priv
, timeout_ms
, work
);
2364 kfree(route
->path_rec
);
2365 route
->path_rec
= NULL
;
2371 int rdma_set_ib_paths(struct rdma_cm_id
*id
,
2372 struct ib_sa_path_rec
*path_rec
, int num_paths
)
2374 struct rdma_id_private
*id_priv
;
2377 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2378 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_RESOLVED
,
2379 RDMA_CM_ROUTE_RESOLVED
))
2382 id
->route
.path_rec
= kmemdup(path_rec
, sizeof *path_rec
* num_paths
,
2384 if (!id
->route
.path_rec
) {
2389 id
->route
.num_paths
= num_paths
;
2392 cma_comp_exch(id_priv
, RDMA_CM_ROUTE_RESOLVED
, RDMA_CM_ADDR_RESOLVED
);
2395 EXPORT_SYMBOL(rdma_set_ib_paths
);
2397 static int cma_resolve_iw_route(struct rdma_id_private
*id_priv
, int timeout_ms
)
2399 struct cma_work
*work
;
2401 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2406 INIT_WORK(&work
->work
, cma_work_handler
);
2407 work
->old_state
= RDMA_CM_ROUTE_QUERY
;
2408 work
->new_state
= RDMA_CM_ROUTE_RESOLVED
;
2409 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
2410 queue_work(cma_wq
, &work
->work
);
2414 static int iboe_tos_to_sl(struct net_device
*ndev
, int tos
)
2417 struct net_device
*dev
;
2419 prio
= rt_tos2priority(tos
);
2420 dev
= ndev
->priv_flags
& IFF_802_1Q_VLAN
?
2421 vlan_dev_real_dev(ndev
) : ndev
;
2424 return netdev_get_prio_tc_map(dev
, prio
);
2426 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2427 if (ndev
->priv_flags
& IFF_802_1Q_VLAN
)
2428 return (vlan_dev_get_egress_qos_mask(ndev
, prio
) &
2429 VLAN_PRIO_MASK
) >> VLAN_PRIO_SHIFT
;
2434 static int cma_resolve_iboe_route(struct rdma_id_private
*id_priv
)
2436 struct rdma_route
*route
= &id_priv
->id
.route
;
2437 struct rdma_addr
*addr
= &route
->addr
;
2438 struct cma_work
*work
;
2440 struct net_device
*ndev
= NULL
;
2443 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2448 INIT_WORK(&work
->work
, cma_work_handler
);
2450 route
->path_rec
= kzalloc(sizeof *route
->path_rec
, GFP_KERNEL
);
2451 if (!route
->path_rec
) {
2456 route
->num_paths
= 1;
2458 if (addr
->dev_addr
.bound_dev_if
) {
2459 ndev
= dev_get_by_index(&init_net
, addr
->dev_addr
.bound_dev_if
);
2463 if (ndev
->flags
& IFF_LOOPBACK
) {
2465 if (!id_priv
->id
.device
->get_netdev
)
2468 ndev
= id_priv
->id
.device
->get_netdev(id_priv
->id
.device
,
2469 id_priv
->id
.port_num
);
2474 route
->path_rec
->net
= &init_net
;
2475 route
->path_rec
->ifindex
= ndev
->ifindex
;
2476 route
->path_rec
->gid_type
= id_priv
->gid_type
;
2483 memcpy(route
->path_rec
->dmac
, addr
->dev_addr
.dst_dev_addr
, ETH_ALEN
);
2485 rdma_ip2gid((struct sockaddr
*)&id_priv
->id
.route
.addr
.src_addr
,
2486 &route
->path_rec
->sgid
);
2487 rdma_ip2gid((struct sockaddr
*)&id_priv
->id
.route
.addr
.dst_addr
,
2488 &route
->path_rec
->dgid
);
2490 /* Use the hint from IP Stack to select GID Type */
2491 if (route
->path_rec
->gid_type
< ib_network_to_gid_type(addr
->dev_addr
.network
))
2492 route
->path_rec
->gid_type
= ib_network_to_gid_type(addr
->dev_addr
.network
);
2493 if (((struct sockaddr
*)&id_priv
->id
.route
.addr
.dst_addr
)->sa_family
!= AF_IB
)
2494 /* TODO: get the hoplimit from the inet/inet6 device */
2495 route
->path_rec
->hop_limit
= addr
->dev_addr
.hoplimit
;
2497 route
->path_rec
->hop_limit
= 1;
2498 route
->path_rec
->reversible
= 1;
2499 route
->path_rec
->pkey
= cpu_to_be16(0xffff);
2500 route
->path_rec
->mtu_selector
= IB_SA_EQ
;
2501 route
->path_rec
->sl
= iboe_tos_to_sl(ndev
, id_priv
->tos
);
2502 route
->path_rec
->mtu
= iboe_get_mtu(ndev
->mtu
);
2503 route
->path_rec
->rate_selector
= IB_SA_EQ
;
2504 route
->path_rec
->rate
= iboe_get_rate(ndev
);
2506 route
->path_rec
->packet_life_time_selector
= IB_SA_EQ
;
2507 route
->path_rec
->packet_life_time
= CMA_IBOE_PACKET_LIFETIME
;
2508 if (!route
->path_rec
->mtu
) {
2513 work
->old_state
= RDMA_CM_ROUTE_QUERY
;
2514 work
->new_state
= RDMA_CM_ROUTE_RESOLVED
;
2515 work
->event
.event
= RDMA_CM_EVENT_ROUTE_RESOLVED
;
2516 work
->event
.status
= 0;
2518 queue_work(cma_wq
, &work
->work
);
2523 kfree(route
->path_rec
);
2524 route
->path_rec
= NULL
;
2530 int rdma_resolve_route(struct rdma_cm_id
*id
, int timeout_ms
)
2532 struct rdma_id_private
*id_priv
;
2535 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2536 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_RESOLVED
, RDMA_CM_ROUTE_QUERY
))
2539 atomic_inc(&id_priv
->refcount
);
2540 if (rdma_cap_ib_sa(id
->device
, id
->port_num
))
2541 ret
= cma_resolve_ib_route(id_priv
, timeout_ms
);
2542 else if (rdma_protocol_roce(id
->device
, id
->port_num
))
2543 ret
= cma_resolve_iboe_route(id_priv
);
2544 else if (rdma_protocol_iwarp(id
->device
, id
->port_num
))
2545 ret
= cma_resolve_iw_route(id_priv
, timeout_ms
);
2554 cma_comp_exch(id_priv
, RDMA_CM_ROUTE_QUERY
, RDMA_CM_ADDR_RESOLVED
);
2555 cma_deref_id(id_priv
);
2558 EXPORT_SYMBOL(rdma_resolve_route
);
2560 static void cma_set_loopback(struct sockaddr
*addr
)
2562 switch (addr
->sa_family
) {
2564 ((struct sockaddr_in
*) addr
)->sin_addr
.s_addr
= htonl(INADDR_LOOPBACK
);
2567 ipv6_addr_set(&((struct sockaddr_in6
*) addr
)->sin6_addr
,
2571 ib_addr_set(&((struct sockaddr_ib
*) addr
)->sib_addr
,
2577 static int cma_bind_loopback(struct rdma_id_private
*id_priv
)
2579 struct cma_device
*cma_dev
, *cur_dev
;
2580 struct ib_port_attr port_attr
;
2588 list_for_each_entry(cur_dev
, &dev_list
, list
) {
2589 if (cma_family(id_priv
) == AF_IB
&&
2590 !rdma_cap_ib_cm(cur_dev
->device
, 1))
2596 for (p
= 1; p
<= cur_dev
->device
->phys_port_cnt
; ++p
) {
2597 if (!ib_query_port(cur_dev
->device
, p
, &port_attr
) &&
2598 port_attr
.state
== IB_PORT_ACTIVE
) {
2613 ret
= ib_get_cached_gid(cma_dev
->device
, p
, 0, &gid
, NULL
);
2617 ret
= ib_get_cached_pkey(cma_dev
->device
, p
, 0, &pkey
);
2621 id_priv
->id
.route
.addr
.dev_addr
.dev_type
=
2622 (rdma_protocol_ib(cma_dev
->device
, p
)) ?
2623 ARPHRD_INFINIBAND
: ARPHRD_ETHER
;
2625 rdma_addr_set_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
2626 ib_addr_set_pkey(&id_priv
->id
.route
.addr
.dev_addr
, pkey
);
2627 id_priv
->id
.port_num
= p
;
2628 cma_attach_to_dev(id_priv
, cma_dev
);
2629 cma_set_loopback(cma_src_addr(id_priv
));
2631 mutex_unlock(&lock
);
2635 static void addr_handler(int status
, struct sockaddr
*src_addr
,
2636 struct rdma_dev_addr
*dev_addr
, void *context
)
2638 struct rdma_id_private
*id_priv
= context
;
2639 struct rdma_cm_event event
;
2641 memset(&event
, 0, sizeof event
);
2642 mutex_lock(&id_priv
->handler_mutex
);
2643 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_QUERY
,
2644 RDMA_CM_ADDR_RESOLVED
))
2647 memcpy(cma_src_addr(id_priv
), src_addr
, rdma_addr_size(src_addr
));
2648 if (!status
&& !id_priv
->cma_dev
)
2649 status
= cma_acquire_dev(id_priv
, NULL
);
2652 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_RESOLVED
,
2653 RDMA_CM_ADDR_BOUND
))
2655 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
2656 event
.status
= status
;
2658 event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
2660 if (id_priv
->id
.event_handler(&id_priv
->id
, &event
)) {
2661 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
2662 mutex_unlock(&id_priv
->handler_mutex
);
2663 cma_deref_id(id_priv
);
2664 rdma_destroy_id(&id_priv
->id
);
2668 mutex_unlock(&id_priv
->handler_mutex
);
2669 cma_deref_id(id_priv
);
2672 static int cma_resolve_loopback(struct rdma_id_private
*id_priv
)
2674 struct cma_work
*work
;
2678 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2682 if (!id_priv
->cma_dev
) {
2683 ret
= cma_bind_loopback(id_priv
);
2688 rdma_addr_get_sgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
2689 rdma_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, &gid
);
2692 INIT_WORK(&work
->work
, cma_work_handler
);
2693 work
->old_state
= RDMA_CM_ADDR_QUERY
;
2694 work
->new_state
= RDMA_CM_ADDR_RESOLVED
;
2695 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
2696 queue_work(cma_wq
, &work
->work
);
2703 static int cma_resolve_ib_addr(struct rdma_id_private
*id_priv
)
2705 struct cma_work
*work
;
2708 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
2712 if (!id_priv
->cma_dev
) {
2713 ret
= cma_resolve_ib_dev(id_priv
);
2718 rdma_addr_set_dgid(&id_priv
->id
.route
.addr
.dev_addr
, (union ib_gid
*)
2719 &(((struct sockaddr_ib
*) &id_priv
->id
.route
.addr
.dst_addr
)->sib_addr
));
2722 INIT_WORK(&work
->work
, cma_work_handler
);
2723 work
->old_state
= RDMA_CM_ADDR_QUERY
;
2724 work
->new_state
= RDMA_CM_ADDR_RESOLVED
;
2725 work
->event
.event
= RDMA_CM_EVENT_ADDR_RESOLVED
;
2726 queue_work(cma_wq
, &work
->work
);
2733 static int cma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
2734 struct sockaddr
*dst_addr
)
2736 if (!src_addr
|| !src_addr
->sa_family
) {
2737 src_addr
= (struct sockaddr
*) &id
->route
.addr
.src_addr
;
2738 src_addr
->sa_family
= dst_addr
->sa_family
;
2739 if (dst_addr
->sa_family
== AF_INET6
) {
2740 struct sockaddr_in6
*src_addr6
= (struct sockaddr_in6
*) src_addr
;
2741 struct sockaddr_in6
*dst_addr6
= (struct sockaddr_in6
*) dst_addr
;
2742 src_addr6
->sin6_scope_id
= dst_addr6
->sin6_scope_id
;
2743 if (ipv6_addr_type(&dst_addr6
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
)
2744 id
->route
.addr
.dev_addr
.bound_dev_if
= dst_addr6
->sin6_scope_id
;
2745 } else if (dst_addr
->sa_family
== AF_IB
) {
2746 ((struct sockaddr_ib
*) src_addr
)->sib_pkey
=
2747 ((struct sockaddr_ib
*) dst_addr
)->sib_pkey
;
2750 return rdma_bind_addr(id
, src_addr
);
2753 int rdma_resolve_addr(struct rdma_cm_id
*id
, struct sockaddr
*src_addr
,
2754 struct sockaddr
*dst_addr
, int timeout_ms
)
2756 struct rdma_id_private
*id_priv
;
2759 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2760 if (id_priv
->state
== RDMA_CM_IDLE
) {
2761 ret
= cma_bind_addr(id
, src_addr
, dst_addr
);
2766 if (cma_family(id_priv
) != dst_addr
->sa_family
)
2769 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_BOUND
, RDMA_CM_ADDR_QUERY
))
2772 atomic_inc(&id_priv
->refcount
);
2773 memcpy(cma_dst_addr(id_priv
), dst_addr
, rdma_addr_size(dst_addr
));
2774 if (cma_any_addr(dst_addr
)) {
2775 ret
= cma_resolve_loopback(id_priv
);
2777 if (dst_addr
->sa_family
== AF_IB
) {
2778 ret
= cma_resolve_ib_addr(id_priv
);
2780 ret
= rdma_resolve_ip(&addr_client
, cma_src_addr(id_priv
),
2781 dst_addr
, &id
->route
.addr
.dev_addr
,
2782 timeout_ms
, addr_handler
, id_priv
);
2790 cma_comp_exch(id_priv
, RDMA_CM_ADDR_QUERY
, RDMA_CM_ADDR_BOUND
);
2791 cma_deref_id(id_priv
);
2794 EXPORT_SYMBOL(rdma_resolve_addr
);
2796 int rdma_set_reuseaddr(struct rdma_cm_id
*id
, int reuse
)
2798 struct rdma_id_private
*id_priv
;
2799 unsigned long flags
;
2802 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2803 spin_lock_irqsave(&id_priv
->lock
, flags
);
2804 if (reuse
|| id_priv
->state
== RDMA_CM_IDLE
) {
2805 id_priv
->reuseaddr
= reuse
;
2810 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
2813 EXPORT_SYMBOL(rdma_set_reuseaddr
);
2815 int rdma_set_afonly(struct rdma_cm_id
*id
, int afonly
)
2817 struct rdma_id_private
*id_priv
;
2818 unsigned long flags
;
2821 id_priv
= container_of(id
, struct rdma_id_private
, id
);
2822 spin_lock_irqsave(&id_priv
->lock
, flags
);
2823 if (id_priv
->state
== RDMA_CM_IDLE
|| id_priv
->state
== RDMA_CM_ADDR_BOUND
) {
2824 id_priv
->options
|= (1 << CMA_OPTION_AFONLY
);
2825 id_priv
->afonly
= afonly
;
2830 spin_unlock_irqrestore(&id_priv
->lock
, flags
);
2833 EXPORT_SYMBOL(rdma_set_afonly
);
2835 static void cma_bind_port(struct rdma_bind_list
*bind_list
,
2836 struct rdma_id_private
*id_priv
)
2838 struct sockaddr
*addr
;
2839 struct sockaddr_ib
*sib
;
2843 addr
= cma_src_addr(id_priv
);
2844 port
= htons(bind_list
->port
);
2846 switch (addr
->sa_family
) {
2848 ((struct sockaddr_in
*) addr
)->sin_port
= port
;
2851 ((struct sockaddr_in6
*) addr
)->sin6_port
= port
;
2854 sib
= (struct sockaddr_ib
*) addr
;
2855 sid
= be64_to_cpu(sib
->sib_sid
);
2856 mask
= be64_to_cpu(sib
->sib_sid_mask
);
2857 sib
->sib_sid
= cpu_to_be64((sid
& mask
) | (u64
) ntohs(port
));
2858 sib
->sib_sid_mask
= cpu_to_be64(~0ULL);
2861 id_priv
->bind_list
= bind_list
;
2862 hlist_add_head(&id_priv
->node
, &bind_list
->owners
);
2865 static int cma_alloc_port(enum rdma_port_space ps
,
2866 struct rdma_id_private
*id_priv
, unsigned short snum
)
2868 struct rdma_bind_list
*bind_list
;
2871 bind_list
= kzalloc(sizeof *bind_list
, GFP_KERNEL
);
2875 ret
= cma_ps_alloc(id_priv
->id
.route
.addr
.dev_addr
.net
, ps
, bind_list
,
2881 bind_list
->port
= (unsigned short)ret
;
2882 cma_bind_port(bind_list
, id_priv
);
2886 return ret
== -ENOSPC
? -EADDRNOTAVAIL
: ret
;
2889 static int cma_alloc_any_port(enum rdma_port_space ps
,
2890 struct rdma_id_private
*id_priv
)
2892 static unsigned int last_used_port
;
2893 int low
, high
, remaining
;
2895 struct net
*net
= id_priv
->id
.route
.addr
.dev_addr
.net
;
2897 inet_get_local_port_range(net
, &low
, &high
);
2898 remaining
= (high
- low
) + 1;
2899 rover
= prandom_u32() % remaining
+ low
;
2901 if (last_used_port
!= rover
&&
2902 !cma_ps_find(net
, ps
, (unsigned short)rover
)) {
2903 int ret
= cma_alloc_port(ps
, id_priv
, rover
);
2905 * Remember previously used port number in order to avoid
2906 * re-using same port immediately after it is closed.
2909 last_used_port
= rover
;
2910 if (ret
!= -EADDRNOTAVAIL
)
2915 if ((rover
< low
) || (rover
> high
))
2919 return -EADDRNOTAVAIL
;
2923 * Check that the requested port is available. This is called when trying to
2924 * bind to a specific port, or when trying to listen on a bound port. In
2925 * the latter case, the provided id_priv may already be on the bind_list, but
2926 * we still need to check that it's okay to start listening.
2928 static int cma_check_port(struct rdma_bind_list
*bind_list
,
2929 struct rdma_id_private
*id_priv
, uint8_t reuseaddr
)
2931 struct rdma_id_private
*cur_id
;
2932 struct sockaddr
*addr
, *cur_addr
;
2934 addr
= cma_src_addr(id_priv
);
2935 hlist_for_each_entry(cur_id
, &bind_list
->owners
, node
) {
2936 if (id_priv
== cur_id
)
2939 if ((cur_id
->state
!= RDMA_CM_LISTEN
) && reuseaddr
&&
2943 cur_addr
= cma_src_addr(cur_id
);
2944 if (id_priv
->afonly
&& cur_id
->afonly
&&
2945 (addr
->sa_family
!= cur_addr
->sa_family
))
2948 if (cma_any_addr(addr
) || cma_any_addr(cur_addr
))
2949 return -EADDRNOTAVAIL
;
2951 if (!cma_addr_cmp(addr
, cur_addr
))
2957 static int cma_use_port(enum rdma_port_space ps
,
2958 struct rdma_id_private
*id_priv
)
2960 struct rdma_bind_list
*bind_list
;
2961 unsigned short snum
;
2964 snum
= ntohs(cma_port(cma_src_addr(id_priv
)));
2965 if (snum
< PROT_SOCK
&& !capable(CAP_NET_BIND_SERVICE
))
2968 bind_list
= cma_ps_find(id_priv
->id
.route
.addr
.dev_addr
.net
, ps
, snum
);
2970 ret
= cma_alloc_port(ps
, id_priv
, snum
);
2972 ret
= cma_check_port(bind_list
, id_priv
, id_priv
->reuseaddr
);
2974 cma_bind_port(bind_list
, id_priv
);
2979 static int cma_bind_listen(struct rdma_id_private
*id_priv
)
2981 struct rdma_bind_list
*bind_list
= id_priv
->bind_list
;
2985 if (bind_list
->owners
.first
->next
)
2986 ret
= cma_check_port(bind_list
, id_priv
, 0);
2987 mutex_unlock(&lock
);
2991 static enum rdma_port_space
cma_select_inet_ps(
2992 struct rdma_id_private
*id_priv
)
2994 switch (id_priv
->id
.ps
) {
2999 return id_priv
->id
.ps
;
3006 static enum rdma_port_space
cma_select_ib_ps(struct rdma_id_private
*id_priv
)
3008 enum rdma_port_space ps
= 0;
3009 struct sockaddr_ib
*sib
;
3010 u64 sid_ps
, mask
, sid
;
3012 sib
= (struct sockaddr_ib
*) cma_src_addr(id_priv
);
3013 mask
= be64_to_cpu(sib
->sib_sid_mask
) & RDMA_IB_IP_PS_MASK
;
3014 sid
= be64_to_cpu(sib
->sib_sid
) & mask
;
3016 if ((id_priv
->id
.ps
== RDMA_PS_IB
) && (sid
== (RDMA_IB_IP_PS_IB
& mask
))) {
3017 sid_ps
= RDMA_IB_IP_PS_IB
;
3019 } else if (((id_priv
->id
.ps
== RDMA_PS_IB
) || (id_priv
->id
.ps
== RDMA_PS_TCP
)) &&
3020 (sid
== (RDMA_IB_IP_PS_TCP
& mask
))) {
3021 sid_ps
= RDMA_IB_IP_PS_TCP
;
3023 } else if (((id_priv
->id
.ps
== RDMA_PS_IB
) || (id_priv
->id
.ps
== RDMA_PS_UDP
)) &&
3024 (sid
== (RDMA_IB_IP_PS_UDP
& mask
))) {
3025 sid_ps
= RDMA_IB_IP_PS_UDP
;
3030 sib
->sib_sid
= cpu_to_be64(sid_ps
| ntohs(cma_port((struct sockaddr
*) sib
)));
3031 sib
->sib_sid_mask
= cpu_to_be64(RDMA_IB_IP_PS_MASK
|
3032 be64_to_cpu(sib
->sib_sid_mask
));
3037 static int cma_get_port(struct rdma_id_private
*id_priv
)
3039 enum rdma_port_space ps
;
3042 if (cma_family(id_priv
) != AF_IB
)
3043 ps
= cma_select_inet_ps(id_priv
);
3045 ps
= cma_select_ib_ps(id_priv
);
3047 return -EPROTONOSUPPORT
;
3050 if (cma_any_port(cma_src_addr(id_priv
)))
3051 ret
= cma_alloc_any_port(ps
, id_priv
);
3053 ret
= cma_use_port(ps
, id_priv
);
3054 mutex_unlock(&lock
);
3059 static int cma_check_linklocal(struct rdma_dev_addr
*dev_addr
,
3060 struct sockaddr
*addr
)
3062 #if IS_ENABLED(CONFIG_IPV6)
3063 struct sockaddr_in6
*sin6
;
3065 if (addr
->sa_family
!= AF_INET6
)
3068 sin6
= (struct sockaddr_in6
*) addr
;
3070 if (!(ipv6_addr_type(&sin6
->sin6_addr
) & IPV6_ADDR_LINKLOCAL
))
3073 if (!sin6
->sin6_scope_id
)
3076 dev_addr
->bound_dev_if
= sin6
->sin6_scope_id
;
3081 int rdma_listen(struct rdma_cm_id
*id
, int backlog
)
3083 struct rdma_id_private
*id_priv
;
3086 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3087 if (id_priv
->state
== RDMA_CM_IDLE
) {
3088 id
->route
.addr
.src_addr
.ss_family
= AF_INET
;
3089 ret
= rdma_bind_addr(id
, cma_src_addr(id_priv
));
3094 if (!cma_comp_exch(id_priv
, RDMA_CM_ADDR_BOUND
, RDMA_CM_LISTEN
))
3097 if (id_priv
->reuseaddr
) {
3098 ret
= cma_bind_listen(id_priv
);
3103 id_priv
->backlog
= backlog
;
3105 if (rdma_cap_ib_cm(id
->device
, 1)) {
3106 ret
= cma_ib_listen(id_priv
);
3109 } else if (rdma_cap_iw_cm(id
->device
, 1)) {
3110 ret
= cma_iw_listen(id_priv
, backlog
);
3118 cma_listen_on_all(id_priv
);
3122 id_priv
->backlog
= 0;
3123 cma_comp_exch(id_priv
, RDMA_CM_LISTEN
, RDMA_CM_ADDR_BOUND
);
3126 EXPORT_SYMBOL(rdma_listen
);
3128 int rdma_bind_addr(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
3130 struct rdma_id_private
*id_priv
;
3133 if (addr
->sa_family
!= AF_INET
&& addr
->sa_family
!= AF_INET6
&&
3134 addr
->sa_family
!= AF_IB
)
3135 return -EAFNOSUPPORT
;
3137 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3138 if (!cma_comp_exch(id_priv
, RDMA_CM_IDLE
, RDMA_CM_ADDR_BOUND
))
3141 ret
= cma_check_linklocal(&id
->route
.addr
.dev_addr
, addr
);
3145 memcpy(cma_src_addr(id_priv
), addr
, rdma_addr_size(addr
));
3146 if (!cma_any_addr(addr
)) {
3147 ret
= cma_translate_addr(addr
, &id
->route
.addr
.dev_addr
);
3151 ret
= cma_acquire_dev(id_priv
, NULL
);
3156 if (!(id_priv
->options
& (1 << CMA_OPTION_AFONLY
))) {
3157 if (addr
->sa_family
== AF_INET
)
3158 id_priv
->afonly
= 1;
3159 #if IS_ENABLED(CONFIG_IPV6)
3160 else if (addr
->sa_family
== AF_INET6
) {
3161 struct net
*net
= id_priv
->id
.route
.addr
.dev_addr
.net
;
3163 id_priv
->afonly
= net
->ipv6
.sysctl
.bindv6only
;
3167 ret
= cma_get_port(id_priv
);
3173 if (id_priv
->cma_dev
)
3174 cma_release_dev(id_priv
);
3176 cma_comp_exch(id_priv
, RDMA_CM_ADDR_BOUND
, RDMA_CM_IDLE
);
3179 EXPORT_SYMBOL(rdma_bind_addr
);
3181 static int cma_format_hdr(void *hdr
, struct rdma_id_private
*id_priv
)
3183 struct cma_hdr
*cma_hdr
;
3186 cma_hdr
->cma_version
= CMA_VERSION
;
3187 if (cma_family(id_priv
) == AF_INET
) {
3188 struct sockaddr_in
*src4
, *dst4
;
3190 src4
= (struct sockaddr_in
*) cma_src_addr(id_priv
);
3191 dst4
= (struct sockaddr_in
*) cma_dst_addr(id_priv
);
3193 cma_set_ip_ver(cma_hdr
, 4);
3194 cma_hdr
->src_addr
.ip4
.addr
= src4
->sin_addr
.s_addr
;
3195 cma_hdr
->dst_addr
.ip4
.addr
= dst4
->sin_addr
.s_addr
;
3196 cma_hdr
->port
= src4
->sin_port
;
3197 } else if (cma_family(id_priv
) == AF_INET6
) {
3198 struct sockaddr_in6
*src6
, *dst6
;
3200 src6
= (struct sockaddr_in6
*) cma_src_addr(id_priv
);
3201 dst6
= (struct sockaddr_in6
*) cma_dst_addr(id_priv
);
3203 cma_set_ip_ver(cma_hdr
, 6);
3204 cma_hdr
->src_addr
.ip6
= src6
->sin6_addr
;
3205 cma_hdr
->dst_addr
.ip6
= dst6
->sin6_addr
;
3206 cma_hdr
->port
= src6
->sin6_port
;
3211 static int cma_sidr_rep_handler(struct ib_cm_id
*cm_id
,
3212 struct ib_cm_event
*ib_event
)
3214 struct rdma_id_private
*id_priv
= cm_id
->context
;
3215 struct rdma_cm_event event
;
3216 struct ib_cm_sidr_rep_event_param
*rep
= &ib_event
->param
.sidr_rep_rcvd
;
3219 if (cma_disable_callback(id_priv
, RDMA_CM_CONNECT
))
3222 memset(&event
, 0, sizeof event
);
3223 switch (ib_event
->event
) {
3224 case IB_CM_SIDR_REQ_ERROR
:
3225 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
3226 event
.status
= -ETIMEDOUT
;
3228 case IB_CM_SIDR_REP_RECEIVED
:
3229 event
.param
.ud
.private_data
= ib_event
->private_data
;
3230 event
.param
.ud
.private_data_len
= IB_CM_SIDR_REP_PRIVATE_DATA_SIZE
;
3231 if (rep
->status
!= IB_SIDR_SUCCESS
) {
3232 event
.event
= RDMA_CM_EVENT_UNREACHABLE
;
3233 event
.status
= ib_event
->param
.sidr_rep_rcvd
.status
;
3236 ret
= cma_set_qkey(id_priv
, rep
->qkey
);
3238 event
.event
= RDMA_CM_EVENT_ADDR_ERROR
;
3242 ib_init_ah_from_path(id_priv
->id
.device
, id_priv
->id
.port_num
,
3243 id_priv
->id
.route
.path_rec
,
3244 &event
.param
.ud
.ah_attr
);
3245 event
.param
.ud
.qp_num
= rep
->qpn
;
3246 event
.param
.ud
.qkey
= rep
->qkey
;
3247 event
.event
= RDMA_CM_EVENT_ESTABLISHED
;
3251 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3256 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
3258 /* Destroy the CM ID by returning a non-zero value. */
3259 id_priv
->cm_id
.ib
= NULL
;
3260 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
3261 mutex_unlock(&id_priv
->handler_mutex
);
3262 rdma_destroy_id(&id_priv
->id
);
3266 mutex_unlock(&id_priv
->handler_mutex
);
3270 static int cma_resolve_ib_udp(struct rdma_id_private
*id_priv
,
3271 struct rdma_conn_param
*conn_param
)
3273 struct ib_cm_sidr_req_param req
;
3274 struct ib_cm_id
*id
;
3278 memset(&req
, 0, sizeof req
);
3279 offset
= cma_user_data_offset(id_priv
);
3280 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
3281 if (req
.private_data_len
< conn_param
->private_data_len
)
3284 if (req
.private_data_len
) {
3285 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
3289 private_data
= NULL
;
3292 if (conn_param
->private_data
&& conn_param
->private_data_len
)
3293 memcpy(private_data
+ offset
, conn_param
->private_data
,
3294 conn_param
->private_data_len
);
3297 ret
= cma_format_hdr(private_data
, id_priv
);
3300 req
.private_data
= private_data
;
3303 id
= ib_create_cm_id(id_priv
->id
.device
, cma_sidr_rep_handler
,
3309 id_priv
->cm_id
.ib
= id
;
3311 req
.path
= id_priv
->id
.route
.path_rec
;
3312 req
.service_id
= rdma_get_service_id(&id_priv
->id
, cma_dst_addr(id_priv
));
3313 req
.timeout_ms
= 1 << (CMA_CM_RESPONSE_TIMEOUT
- 8);
3314 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
3316 ret
= ib_send_cm_sidr_req(id_priv
->cm_id
.ib
, &req
);
3318 ib_destroy_cm_id(id_priv
->cm_id
.ib
);
3319 id_priv
->cm_id
.ib
= NULL
;
3322 kfree(private_data
);
3326 static int cma_connect_ib(struct rdma_id_private
*id_priv
,
3327 struct rdma_conn_param
*conn_param
)
3329 struct ib_cm_req_param req
;
3330 struct rdma_route
*route
;
3332 struct ib_cm_id
*id
;
3335 memset(&req
, 0, sizeof req
);
3336 offset
= cma_user_data_offset(id_priv
);
3337 req
.private_data_len
= offset
+ conn_param
->private_data_len
;
3338 if (req
.private_data_len
< conn_param
->private_data_len
)
3341 if (req
.private_data_len
) {
3342 private_data
= kzalloc(req
.private_data_len
, GFP_ATOMIC
);
3346 private_data
= NULL
;
3349 if (conn_param
->private_data
&& conn_param
->private_data_len
)
3350 memcpy(private_data
+ offset
, conn_param
->private_data
,
3351 conn_param
->private_data_len
);
3353 id
= ib_create_cm_id(id_priv
->id
.device
, cma_ib_handler
, id_priv
);
3358 id_priv
->cm_id
.ib
= id
;
3360 route
= &id_priv
->id
.route
;
3362 ret
= cma_format_hdr(private_data
, id_priv
);
3365 req
.private_data
= private_data
;
3368 req
.primary_path
= &route
->path_rec
[0];
3369 if (route
->num_paths
== 2)
3370 req
.alternate_path
= &route
->path_rec
[1];
3372 req
.service_id
= rdma_get_service_id(&id_priv
->id
, cma_dst_addr(id_priv
));
3373 req
.qp_num
= id_priv
->qp_num
;
3374 req
.qp_type
= id_priv
->id
.qp_type
;
3375 req
.starting_psn
= id_priv
->seq_num
;
3376 req
.responder_resources
= conn_param
->responder_resources
;
3377 req
.initiator_depth
= conn_param
->initiator_depth
;
3378 req
.flow_control
= conn_param
->flow_control
;
3379 req
.retry_count
= min_t(u8
, 7, conn_param
->retry_count
);
3380 req
.rnr_retry_count
= min_t(u8
, 7, conn_param
->rnr_retry_count
);
3381 req
.remote_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
3382 req
.local_cm_response_timeout
= CMA_CM_RESPONSE_TIMEOUT
;
3383 req
.max_cm_retries
= CMA_MAX_CM_RETRIES
;
3384 req
.srq
= id_priv
->srq
? 1 : 0;
3386 ret
= ib_send_cm_req(id_priv
->cm_id
.ib
, &req
);
3388 if (ret
&& !IS_ERR(id
)) {
3389 ib_destroy_cm_id(id
);
3390 id_priv
->cm_id
.ib
= NULL
;
3393 kfree(private_data
);
3397 static int cma_connect_iw(struct rdma_id_private
*id_priv
,
3398 struct rdma_conn_param
*conn_param
)
3400 struct iw_cm_id
*cm_id
;
3402 struct iw_cm_conn_param iw_param
;
3404 cm_id
= iw_create_cm_id(id_priv
->id
.device
, cma_iw_handler
, id_priv
);
3406 return PTR_ERR(cm_id
);
3408 cm_id
->tos
= id_priv
->tos
;
3409 id_priv
->cm_id
.iw
= cm_id
;
3411 memcpy(&cm_id
->local_addr
, cma_src_addr(id_priv
),
3412 rdma_addr_size(cma_src_addr(id_priv
)));
3413 memcpy(&cm_id
->remote_addr
, cma_dst_addr(id_priv
),
3414 rdma_addr_size(cma_dst_addr(id_priv
)));
3416 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
3421 iw_param
.ord
= conn_param
->initiator_depth
;
3422 iw_param
.ird
= conn_param
->responder_resources
;
3423 iw_param
.private_data
= conn_param
->private_data
;
3424 iw_param
.private_data_len
= conn_param
->private_data_len
;
3425 iw_param
.qpn
= id_priv
->id
.qp
? id_priv
->qp_num
: conn_param
->qp_num
;
3427 memset(&iw_param
, 0, sizeof iw_param
);
3428 iw_param
.qpn
= id_priv
->qp_num
;
3430 ret
= iw_cm_connect(cm_id
, &iw_param
);
3433 iw_destroy_cm_id(cm_id
);
3434 id_priv
->cm_id
.iw
= NULL
;
3439 int rdma_connect(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
3441 struct rdma_id_private
*id_priv
;
3444 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3445 if (!cma_comp_exch(id_priv
, RDMA_CM_ROUTE_RESOLVED
, RDMA_CM_CONNECT
))
3449 id_priv
->qp_num
= conn_param
->qp_num
;
3450 id_priv
->srq
= conn_param
->srq
;
3453 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
3454 if (id
->qp_type
== IB_QPT_UD
)
3455 ret
= cma_resolve_ib_udp(id_priv
, conn_param
);
3457 ret
= cma_connect_ib(id_priv
, conn_param
);
3458 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
))
3459 ret
= cma_connect_iw(id_priv
, conn_param
);
3467 cma_comp_exch(id_priv
, RDMA_CM_CONNECT
, RDMA_CM_ROUTE_RESOLVED
);
3470 EXPORT_SYMBOL(rdma_connect
);
3472 static int cma_accept_ib(struct rdma_id_private
*id_priv
,
3473 struct rdma_conn_param
*conn_param
)
3475 struct ib_cm_rep_param rep
;
3478 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
3482 ret
= cma_modify_qp_rts(id_priv
, conn_param
);
3486 memset(&rep
, 0, sizeof rep
);
3487 rep
.qp_num
= id_priv
->qp_num
;
3488 rep
.starting_psn
= id_priv
->seq_num
;
3489 rep
.private_data
= conn_param
->private_data
;
3490 rep
.private_data_len
= conn_param
->private_data_len
;
3491 rep
.responder_resources
= conn_param
->responder_resources
;
3492 rep
.initiator_depth
= conn_param
->initiator_depth
;
3493 rep
.failover_accepted
= 0;
3494 rep
.flow_control
= conn_param
->flow_control
;
3495 rep
.rnr_retry_count
= min_t(u8
, 7, conn_param
->rnr_retry_count
);
3496 rep
.srq
= id_priv
->srq
? 1 : 0;
3498 ret
= ib_send_cm_rep(id_priv
->cm_id
.ib
, &rep
);
3503 static int cma_accept_iw(struct rdma_id_private
*id_priv
,
3504 struct rdma_conn_param
*conn_param
)
3506 struct iw_cm_conn_param iw_param
;
3509 ret
= cma_modify_qp_rtr(id_priv
, conn_param
);
3513 iw_param
.ord
= conn_param
->initiator_depth
;
3514 iw_param
.ird
= conn_param
->responder_resources
;
3515 iw_param
.private_data
= conn_param
->private_data
;
3516 iw_param
.private_data_len
= conn_param
->private_data_len
;
3517 if (id_priv
->id
.qp
) {
3518 iw_param
.qpn
= id_priv
->qp_num
;
3520 iw_param
.qpn
= conn_param
->qp_num
;
3522 return iw_cm_accept(id_priv
->cm_id
.iw
, &iw_param
);
3525 static int cma_send_sidr_rep(struct rdma_id_private
*id_priv
,
3526 enum ib_cm_sidr_status status
, u32 qkey
,
3527 const void *private_data
, int private_data_len
)
3529 struct ib_cm_sidr_rep_param rep
;
3532 memset(&rep
, 0, sizeof rep
);
3533 rep
.status
= status
;
3534 if (status
== IB_SIDR_SUCCESS
) {
3535 ret
= cma_set_qkey(id_priv
, qkey
);
3538 rep
.qp_num
= id_priv
->qp_num
;
3539 rep
.qkey
= id_priv
->qkey
;
3541 rep
.private_data
= private_data
;
3542 rep
.private_data_len
= private_data_len
;
3544 return ib_send_cm_sidr_rep(id_priv
->cm_id
.ib
, &rep
);
3547 int rdma_accept(struct rdma_cm_id
*id
, struct rdma_conn_param
*conn_param
)
3549 struct rdma_id_private
*id_priv
;
3552 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3554 id_priv
->owner
= task_pid_nr(current
);
3556 if (!cma_comp(id_priv
, RDMA_CM_CONNECT
))
3559 if (!id
->qp
&& conn_param
) {
3560 id_priv
->qp_num
= conn_param
->qp_num
;
3561 id_priv
->srq
= conn_param
->srq
;
3564 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
3565 if (id
->qp_type
== IB_QPT_UD
) {
3567 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
3569 conn_param
->private_data
,
3570 conn_param
->private_data_len
);
3572 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_SUCCESS
,
3576 ret
= cma_accept_ib(id_priv
, conn_param
);
3578 ret
= cma_rep_recv(id_priv
);
3580 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
))
3581 ret
= cma_accept_iw(id_priv
, conn_param
);
3590 cma_modify_qp_err(id_priv
);
3591 rdma_reject(id
, NULL
, 0);
3594 EXPORT_SYMBOL(rdma_accept
);
3596 int rdma_notify(struct rdma_cm_id
*id
, enum ib_event_type event
)
3598 struct rdma_id_private
*id_priv
;
3601 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3602 if (!id_priv
->cm_id
.ib
)
3605 switch (id
->device
->node_type
) {
3606 case RDMA_NODE_IB_CA
:
3607 ret
= ib_cm_notify(id_priv
->cm_id
.ib
, event
);
3615 EXPORT_SYMBOL(rdma_notify
);
3617 int rdma_reject(struct rdma_cm_id
*id
, const void *private_data
,
3618 u8 private_data_len
)
3620 struct rdma_id_private
*id_priv
;
3623 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3624 if (!id_priv
->cm_id
.ib
)
3627 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
3628 if (id
->qp_type
== IB_QPT_UD
)
3629 ret
= cma_send_sidr_rep(id_priv
, IB_SIDR_REJECT
, 0,
3630 private_data
, private_data_len
);
3632 ret
= ib_send_cm_rej(id_priv
->cm_id
.ib
,
3633 IB_CM_REJ_CONSUMER_DEFINED
, NULL
,
3634 0, private_data
, private_data_len
);
3635 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
)) {
3636 ret
= iw_cm_reject(id_priv
->cm_id
.iw
,
3637 private_data
, private_data_len
);
3643 EXPORT_SYMBOL(rdma_reject
);
3645 int rdma_disconnect(struct rdma_cm_id
*id
)
3647 struct rdma_id_private
*id_priv
;
3650 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3651 if (!id_priv
->cm_id
.ib
)
3654 if (rdma_cap_ib_cm(id
->device
, id
->port_num
)) {
3655 ret
= cma_modify_qp_err(id_priv
);
3658 /* Initiate or respond to a disconnect. */
3659 if (ib_send_cm_dreq(id_priv
->cm_id
.ib
, NULL
, 0))
3660 ib_send_cm_drep(id_priv
->cm_id
.ib
, NULL
, 0);
3661 } else if (rdma_cap_iw_cm(id
->device
, id
->port_num
)) {
3662 ret
= iw_cm_disconnect(id_priv
->cm_id
.iw
, 0);
3669 EXPORT_SYMBOL(rdma_disconnect
);
3671 static int cma_ib_mc_handler(int status
, struct ib_sa_multicast
*multicast
)
3673 struct rdma_id_private
*id_priv
;
3674 struct cma_multicast
*mc
= multicast
->context
;
3675 struct rdma_cm_event event
;
3678 id_priv
= mc
->id_priv
;
3679 if (cma_disable_callback(id_priv
, RDMA_CM_ADDR_BOUND
) &&
3680 cma_disable_callback(id_priv
, RDMA_CM_ADDR_RESOLVED
))
3684 status
= cma_set_qkey(id_priv
, be32_to_cpu(multicast
->rec
.qkey
));
3685 mutex_lock(&id_priv
->qp_mutex
);
3686 if (!status
&& id_priv
->id
.qp
)
3687 status
= ib_attach_mcast(id_priv
->id
.qp
, &multicast
->rec
.mgid
,
3688 be16_to_cpu(multicast
->rec
.mlid
));
3689 mutex_unlock(&id_priv
->qp_mutex
);
3691 memset(&event
, 0, sizeof event
);
3692 event
.status
= status
;
3693 event
.param
.ud
.private_data
= mc
->context
;
3695 struct rdma_dev_addr
*dev_addr
=
3696 &id_priv
->id
.route
.addr
.dev_addr
;
3697 struct net_device
*ndev
=
3698 dev_get_by_index(&init_net
, dev_addr
->bound_dev_if
);
3699 enum ib_gid_type gid_type
=
3700 id_priv
->cma_dev
->default_gid_type
[id_priv
->id
.port_num
-
3701 rdma_start_port(id_priv
->cma_dev
->device
)];
3703 event
.event
= RDMA_CM_EVENT_MULTICAST_JOIN
;
3704 ib_init_ah_from_mcmember(id_priv
->id
.device
,
3705 id_priv
->id
.port_num
, &multicast
->rec
,
3707 &event
.param
.ud
.ah_attr
);
3708 event
.param
.ud
.qp_num
= 0xFFFFFF;
3709 event
.param
.ud
.qkey
= be32_to_cpu(multicast
->rec
.qkey
);
3713 event
.event
= RDMA_CM_EVENT_MULTICAST_ERROR
;
3715 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
3717 cma_exch(id_priv
, RDMA_CM_DESTROYING
);
3718 mutex_unlock(&id_priv
->handler_mutex
);
3719 rdma_destroy_id(&id_priv
->id
);
3723 mutex_unlock(&id_priv
->handler_mutex
);
3727 static void cma_set_mgid(struct rdma_id_private
*id_priv
,
3728 struct sockaddr
*addr
, union ib_gid
*mgid
)
3730 unsigned char mc_map
[MAX_ADDR_LEN
];
3731 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
3732 struct sockaddr_in
*sin
= (struct sockaddr_in
*) addr
;
3733 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*) addr
;
3735 if (cma_any_addr(addr
)) {
3736 memset(mgid
, 0, sizeof *mgid
);
3737 } else if ((addr
->sa_family
== AF_INET6
) &&
3738 ((be32_to_cpu(sin6
->sin6_addr
.s6_addr32
[0]) & 0xFFF0FFFF) ==
3740 /* IPv6 address is an SA assigned MGID. */
3741 memcpy(mgid
, &sin6
->sin6_addr
, sizeof *mgid
);
3742 } else if (addr
->sa_family
== AF_IB
) {
3743 memcpy(mgid
, &((struct sockaddr_ib
*) addr
)->sib_addr
, sizeof *mgid
);
3744 } else if ((addr
->sa_family
== AF_INET6
)) {
3745 ipv6_ib_mc_map(&sin6
->sin6_addr
, dev_addr
->broadcast
, mc_map
);
3746 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
3747 mc_map
[7] = 0x01; /* Use RDMA CM signature */
3748 *mgid
= *(union ib_gid
*) (mc_map
+ 4);
3750 ip_ib_mc_map(sin
->sin_addr
.s_addr
, dev_addr
->broadcast
, mc_map
);
3751 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
3752 mc_map
[7] = 0x01; /* Use RDMA CM signature */
3753 *mgid
= *(union ib_gid
*) (mc_map
+ 4);
3757 static int cma_join_ib_multicast(struct rdma_id_private
*id_priv
,
3758 struct cma_multicast
*mc
)
3760 struct ib_sa_mcmember_rec rec
;
3761 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
3762 ib_sa_comp_mask comp_mask
;
3765 ib_addr_get_mgid(dev_addr
, &rec
.mgid
);
3766 ret
= ib_sa_get_mcmember_rec(id_priv
->id
.device
, id_priv
->id
.port_num
,
3771 ret
= cma_set_qkey(id_priv
, 0);
3775 cma_set_mgid(id_priv
, (struct sockaddr
*) &mc
->addr
, &rec
.mgid
);
3776 rec
.qkey
= cpu_to_be32(id_priv
->qkey
);
3777 rdma_addr_get_sgid(dev_addr
, &rec
.port_gid
);
3778 rec
.pkey
= cpu_to_be16(ib_addr_get_pkey(dev_addr
));
3781 comp_mask
= IB_SA_MCMEMBER_REC_MGID
| IB_SA_MCMEMBER_REC_PORT_GID
|
3782 IB_SA_MCMEMBER_REC_PKEY
| IB_SA_MCMEMBER_REC_JOIN_STATE
|
3783 IB_SA_MCMEMBER_REC_QKEY
| IB_SA_MCMEMBER_REC_SL
|
3784 IB_SA_MCMEMBER_REC_FLOW_LABEL
|
3785 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS
;
3787 if (id_priv
->id
.ps
== RDMA_PS_IPOIB
)
3788 comp_mask
|= IB_SA_MCMEMBER_REC_RATE
|
3789 IB_SA_MCMEMBER_REC_RATE_SELECTOR
|
3790 IB_SA_MCMEMBER_REC_MTU_SELECTOR
|
3791 IB_SA_MCMEMBER_REC_MTU
|
3792 IB_SA_MCMEMBER_REC_HOP_LIMIT
;
3794 mc
->multicast
.ib
= ib_sa_join_multicast(&sa_client
, id_priv
->id
.device
,
3795 id_priv
->id
.port_num
, &rec
,
3796 comp_mask
, GFP_KERNEL
,
3797 cma_ib_mc_handler
, mc
);
3798 return PTR_ERR_OR_ZERO(mc
->multicast
.ib
);
3801 static void iboe_mcast_work_handler(struct work_struct
*work
)
3803 struct iboe_mcast_work
*mw
= container_of(work
, struct iboe_mcast_work
, work
);
3804 struct cma_multicast
*mc
= mw
->mc
;
3805 struct ib_sa_multicast
*m
= mc
->multicast
.ib
;
3807 mc
->multicast
.ib
->context
= mc
;
3808 cma_ib_mc_handler(0, m
);
3809 kref_put(&mc
->mcref
, release_mc
);
3813 static void cma_iboe_set_mgid(struct sockaddr
*addr
, union ib_gid
*mgid
)
3815 struct sockaddr_in
*sin
= (struct sockaddr_in
*)addr
;
3816 struct sockaddr_in6
*sin6
= (struct sockaddr_in6
*)addr
;
3818 if (cma_any_addr(addr
)) {
3819 memset(mgid
, 0, sizeof *mgid
);
3820 } else if (addr
->sa_family
== AF_INET6
) {
3821 memcpy(mgid
, &sin6
->sin6_addr
, sizeof *mgid
);
3823 mgid
->raw
[0] = 0xff;
3824 mgid
->raw
[1] = 0x0e;
3833 mgid
->raw
[10] = 0xff;
3834 mgid
->raw
[11] = 0xff;
3835 *(__be32
*)(&mgid
->raw
[12]) = sin
->sin_addr
.s_addr
;
3839 static int cma_iboe_join_multicast(struct rdma_id_private
*id_priv
,
3840 struct cma_multicast
*mc
)
3842 struct iboe_mcast_work
*work
;
3843 struct rdma_dev_addr
*dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
3845 struct sockaddr
*addr
= (struct sockaddr
*)&mc
->addr
;
3846 struct net_device
*ndev
= NULL
;
3847 enum ib_gid_type gid_type
;
3849 if (cma_zero_addr((struct sockaddr
*)&mc
->addr
))
3852 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
3856 mc
->multicast
.ib
= kzalloc(sizeof(struct ib_sa_multicast
), GFP_KERNEL
);
3857 if (!mc
->multicast
.ib
) {
3862 cma_iboe_set_mgid(addr
, &mc
->multicast
.ib
->rec
.mgid
);
3864 mc
->multicast
.ib
->rec
.pkey
= cpu_to_be16(0xffff);
3865 if (id_priv
->id
.ps
== RDMA_PS_UDP
)
3866 mc
->multicast
.ib
->rec
.qkey
= cpu_to_be32(RDMA_UDP_QKEY
);
3868 if (dev_addr
->bound_dev_if
)
3869 ndev
= dev_get_by_index(&init_net
, dev_addr
->bound_dev_if
);
3874 mc
->multicast
.ib
->rec
.rate
= iboe_get_rate(ndev
);
3875 mc
->multicast
.ib
->rec
.hop_limit
= 1;
3876 mc
->multicast
.ib
->rec
.mtu
= iboe_get_mtu(ndev
->mtu
);
3878 gid_type
= id_priv
->cma_dev
->default_gid_type
[id_priv
->id
.port_num
-
3879 rdma_start_port(id_priv
->cma_dev
->device
)];
3880 if (addr
->sa_family
== AF_INET
) {
3881 if (gid_type
== IB_GID_TYPE_ROCE_UDP_ENCAP
)
3882 err
= cma_igmp_send(ndev
, &mc
->multicast
.ib
->rec
.mgid
,
3885 mc
->igmp_joined
= true;
3886 mc
->multicast
.ib
->rec
.hop_limit
= IPV6_DEFAULT_HOPLIMIT
;
3889 if (gid_type
== IB_GID_TYPE_ROCE_UDP_ENCAP
)
3893 if (err
|| !mc
->multicast
.ib
->rec
.mtu
) {
3898 rdma_ip2gid((struct sockaddr
*)&id_priv
->id
.route
.addr
.src_addr
,
3899 &mc
->multicast
.ib
->rec
.port_gid
);
3902 INIT_WORK(&work
->work
, iboe_mcast_work_handler
);
3903 kref_get(&mc
->mcref
);
3904 queue_work(cma_wq
, &work
->work
);
3909 kfree(mc
->multicast
.ib
);
3915 int rdma_join_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
,
3918 struct rdma_id_private
*id_priv
;
3919 struct cma_multicast
*mc
;
3922 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3923 if (!cma_comp(id_priv
, RDMA_CM_ADDR_BOUND
) &&
3924 !cma_comp(id_priv
, RDMA_CM_ADDR_RESOLVED
))
3927 mc
= kmalloc(sizeof *mc
, GFP_KERNEL
);
3931 memcpy(&mc
->addr
, addr
, rdma_addr_size(addr
));
3932 mc
->context
= context
;
3933 mc
->id_priv
= id_priv
;
3934 mc
->igmp_joined
= false;
3935 spin_lock(&id_priv
->lock
);
3936 list_add(&mc
->list
, &id_priv
->mc_list
);
3937 spin_unlock(&id_priv
->lock
);
3939 if (rdma_protocol_roce(id
->device
, id
->port_num
)) {
3940 kref_init(&mc
->mcref
);
3941 ret
= cma_iboe_join_multicast(id_priv
, mc
);
3942 } else if (rdma_cap_ib_mcast(id
->device
, id
->port_num
))
3943 ret
= cma_join_ib_multicast(id_priv
, mc
);
3948 spin_lock_irq(&id_priv
->lock
);
3949 list_del(&mc
->list
);
3950 spin_unlock_irq(&id_priv
->lock
);
3955 EXPORT_SYMBOL(rdma_join_multicast
);
3957 void rdma_leave_multicast(struct rdma_cm_id
*id
, struct sockaddr
*addr
)
3959 struct rdma_id_private
*id_priv
;
3960 struct cma_multicast
*mc
;
3962 id_priv
= container_of(id
, struct rdma_id_private
, id
);
3963 spin_lock_irq(&id_priv
->lock
);
3964 list_for_each_entry(mc
, &id_priv
->mc_list
, list
) {
3965 if (!memcmp(&mc
->addr
, addr
, rdma_addr_size(addr
))) {
3966 list_del(&mc
->list
);
3967 spin_unlock_irq(&id_priv
->lock
);
3970 ib_detach_mcast(id
->qp
,
3971 &mc
->multicast
.ib
->rec
.mgid
,
3972 be16_to_cpu(mc
->multicast
.ib
->rec
.mlid
));
3974 BUG_ON(id_priv
->cma_dev
->device
!= id
->device
);
3976 if (rdma_cap_ib_mcast(id
->device
, id
->port_num
)) {
3977 ib_sa_free_multicast(mc
->multicast
.ib
);
3979 } else if (rdma_protocol_roce(id
->device
, id
->port_num
)) {
3980 if (mc
->igmp_joined
) {
3981 struct rdma_dev_addr
*dev_addr
=
3982 &id
->route
.addr
.dev_addr
;
3983 struct net_device
*ndev
= NULL
;
3985 if (dev_addr
->bound_dev_if
)
3986 ndev
= dev_get_by_index(&init_net
,
3987 dev_addr
->bound_dev_if
);
3990 &mc
->multicast
.ib
->rec
.mgid
,
3994 mc
->igmp_joined
= false;
3996 kref_put(&mc
->mcref
, release_mc
);
4001 spin_unlock_irq(&id_priv
->lock
);
4003 EXPORT_SYMBOL(rdma_leave_multicast
);
4005 static int cma_netdev_change(struct net_device
*ndev
, struct rdma_id_private
*id_priv
)
4007 struct rdma_dev_addr
*dev_addr
;
4008 struct cma_ndev_work
*work
;
4010 dev_addr
= &id_priv
->id
.route
.addr
.dev_addr
;
4012 if ((dev_addr
->bound_dev_if
== ndev
->ifindex
) &&
4013 (net_eq(dev_net(ndev
), dev_addr
->net
)) &&
4014 memcmp(dev_addr
->src_dev_addr
, ndev
->dev_addr
, ndev
->addr_len
)) {
4015 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4016 ndev
->name
, &id_priv
->id
);
4017 work
= kzalloc(sizeof *work
, GFP_KERNEL
);
4021 INIT_WORK(&work
->work
, cma_ndev_work_handler
);
4023 work
->event
.event
= RDMA_CM_EVENT_ADDR_CHANGE
;
4024 atomic_inc(&id_priv
->refcount
);
4025 queue_work(cma_wq
, &work
->work
);
4031 static int cma_netdev_callback(struct notifier_block
*self
, unsigned long event
,
4034 struct net_device
*ndev
= netdev_notifier_info_to_dev(ptr
);
4035 struct cma_device
*cma_dev
;
4036 struct rdma_id_private
*id_priv
;
4037 int ret
= NOTIFY_DONE
;
4039 if (event
!= NETDEV_BONDING_FAILOVER
)
4042 if (!(ndev
->flags
& IFF_MASTER
) || !(ndev
->priv_flags
& IFF_BONDING
))
4046 list_for_each_entry(cma_dev
, &dev_list
, list
)
4047 list_for_each_entry(id_priv
, &cma_dev
->id_list
, list
) {
4048 ret
= cma_netdev_change(ndev
, id_priv
);
4054 mutex_unlock(&lock
);
4058 static struct notifier_block cma_nb
= {
4059 .notifier_call
= cma_netdev_callback
4062 static void cma_add_one(struct ib_device
*device
)
4064 struct cma_device
*cma_dev
;
4065 struct rdma_id_private
*id_priv
;
4067 unsigned long supported_gids
= 0;
4069 cma_dev
= kmalloc(sizeof *cma_dev
, GFP_KERNEL
);
4073 cma_dev
->device
= device
;
4074 cma_dev
->default_gid_type
= kcalloc(device
->phys_port_cnt
,
4075 sizeof(*cma_dev
->default_gid_type
),
4077 if (!cma_dev
->default_gid_type
) {
4081 for (i
= rdma_start_port(device
); i
<= rdma_end_port(device
); i
++) {
4082 supported_gids
= roce_gid_type_mask_support(device
, i
);
4083 WARN_ON(!supported_gids
);
4084 cma_dev
->default_gid_type
[i
- rdma_start_port(device
)] =
4085 find_first_bit(&supported_gids
, BITS_PER_LONG
);
4088 init_completion(&cma_dev
->comp
);
4089 atomic_set(&cma_dev
->refcount
, 1);
4090 INIT_LIST_HEAD(&cma_dev
->id_list
);
4091 ib_set_client_data(device
, &cma_client
, cma_dev
);
4094 list_add_tail(&cma_dev
->list
, &dev_list
);
4095 list_for_each_entry(id_priv
, &listen_any_list
, list
)
4096 cma_listen_on_dev(id_priv
, cma_dev
);
4097 mutex_unlock(&lock
);
4100 static int cma_remove_id_dev(struct rdma_id_private
*id_priv
)
4102 struct rdma_cm_event event
;
4103 enum rdma_cm_state state
;
4106 /* Record that we want to remove the device */
4107 state
= cma_exch(id_priv
, RDMA_CM_DEVICE_REMOVAL
);
4108 if (state
== RDMA_CM_DESTROYING
)
4111 cma_cancel_operation(id_priv
, state
);
4112 mutex_lock(&id_priv
->handler_mutex
);
4114 /* Check for destruction from another callback. */
4115 if (!cma_comp(id_priv
, RDMA_CM_DEVICE_REMOVAL
))
4118 memset(&event
, 0, sizeof event
);
4119 event
.event
= RDMA_CM_EVENT_DEVICE_REMOVAL
;
4120 ret
= id_priv
->id
.event_handler(&id_priv
->id
, &event
);
4122 mutex_unlock(&id_priv
->handler_mutex
);
4126 static void cma_process_remove(struct cma_device
*cma_dev
)
4128 struct rdma_id_private
*id_priv
;
4132 while (!list_empty(&cma_dev
->id_list
)) {
4133 id_priv
= list_entry(cma_dev
->id_list
.next
,
4134 struct rdma_id_private
, list
);
4136 list_del(&id_priv
->listen_list
);
4137 list_del_init(&id_priv
->list
);
4138 atomic_inc(&id_priv
->refcount
);
4139 mutex_unlock(&lock
);
4141 ret
= id_priv
->internal_id
? 1 : cma_remove_id_dev(id_priv
);
4142 cma_deref_id(id_priv
);
4144 rdma_destroy_id(&id_priv
->id
);
4148 mutex_unlock(&lock
);
4150 cma_deref_dev(cma_dev
);
4151 wait_for_completion(&cma_dev
->comp
);
4154 static void cma_remove_one(struct ib_device
*device
, void *client_data
)
4156 struct cma_device
*cma_dev
= client_data
;
4162 list_del(&cma_dev
->list
);
4163 mutex_unlock(&lock
);
4165 cma_process_remove(cma_dev
);
4166 kfree(cma_dev
->default_gid_type
);
4170 static int cma_get_id_stats(struct sk_buff
*skb
, struct netlink_callback
*cb
)
4172 struct nlmsghdr
*nlh
;
4173 struct rdma_cm_id_stats
*id_stats
;
4174 struct rdma_id_private
*id_priv
;
4175 struct rdma_cm_id
*id
= NULL
;
4176 struct cma_device
*cma_dev
;
4177 int i_dev
= 0, i_id
= 0;
4180 * We export all of the IDs as a sequence of messages. Each
4181 * ID gets its own netlink message.
4185 list_for_each_entry(cma_dev
, &dev_list
, list
) {
4186 if (i_dev
< cb
->args
[0]) {
4192 list_for_each_entry(id_priv
, &cma_dev
->id_list
, list
) {
4193 if (i_id
< cb
->args
[1]) {
4198 id_stats
= ibnl_put_msg(skb
, &nlh
, cb
->nlh
->nlmsg_seq
,
4199 sizeof *id_stats
, RDMA_NL_RDMA_CM
,
4200 RDMA_NL_RDMA_CM_ID_STATS
,
4205 memset(id_stats
, 0, sizeof *id_stats
);
4207 id_stats
->node_type
= id
->route
.addr
.dev_addr
.dev_type
;
4208 id_stats
->port_num
= id
->port_num
;
4209 id_stats
->bound_dev_if
=
4210 id
->route
.addr
.dev_addr
.bound_dev_if
;
4212 if (ibnl_put_attr(skb
, nlh
,
4213 rdma_addr_size(cma_src_addr(id_priv
)),
4214 cma_src_addr(id_priv
),
4215 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR
))
4217 if (ibnl_put_attr(skb
, nlh
,
4218 rdma_addr_size(cma_src_addr(id_priv
)),
4219 cma_dst_addr(id_priv
),
4220 RDMA_NL_RDMA_CM_ATTR_DST_ADDR
))
4223 id_stats
->pid
= id_priv
->owner
;
4224 id_stats
->port_space
= id
->ps
;
4225 id_stats
->cm_state
= id_priv
->state
;
4226 id_stats
->qp_num
= id_priv
->qp_num
;
4227 id_stats
->qp_type
= id
->qp_type
;
4237 mutex_unlock(&lock
);
4238 cb
->args
[0] = i_dev
;
4244 static const struct ibnl_client_cbs cma_cb_table
[] = {
4245 [RDMA_NL_RDMA_CM_ID_STATS
] = { .dump
= cma_get_id_stats
,
4246 .module
= THIS_MODULE
},
4249 static int cma_init_net(struct net
*net
)
4251 struct cma_pernet
*pernet
= cma_pernet(net
);
4253 idr_init(&pernet
->tcp_ps
);
4254 idr_init(&pernet
->udp_ps
);
4255 idr_init(&pernet
->ipoib_ps
);
4256 idr_init(&pernet
->ib_ps
);
4261 static void cma_exit_net(struct net
*net
)
4263 struct cma_pernet
*pernet
= cma_pernet(net
);
4265 idr_destroy(&pernet
->tcp_ps
);
4266 idr_destroy(&pernet
->udp_ps
);
4267 idr_destroy(&pernet
->ipoib_ps
);
4268 idr_destroy(&pernet
->ib_ps
);
4271 static struct pernet_operations cma_pernet_operations
= {
4272 .init
= cma_init_net
,
4273 .exit
= cma_exit_net
,
4274 .id
= &cma_pernet_id
,
4275 .size
= sizeof(struct cma_pernet
),
4278 static int __init
cma_init(void)
4282 cma_wq
= create_singlethread_workqueue("rdma_cm");
4286 ret
= register_pernet_subsys(&cma_pernet_operations
);
4290 ib_sa_register_client(&sa_client
);
4291 rdma_addr_register_client(&addr_client
);
4292 register_netdevice_notifier(&cma_nb
);
4294 ret
= ib_register_client(&cma_client
);
4298 if (ibnl_add_client(RDMA_NL_RDMA_CM
, ARRAY_SIZE(cma_cb_table
),
4300 pr_warn("RDMA CMA: failed to add netlink callback\n");
4301 cma_configfs_init();
4306 unregister_netdevice_notifier(&cma_nb
);
4307 rdma_addr_unregister_client(&addr_client
);
4308 ib_sa_unregister_client(&sa_client
);
4310 destroy_workqueue(cma_wq
);
4314 static void __exit
cma_cleanup(void)
4316 cma_configfs_exit();
4317 ibnl_remove_client(RDMA_NL_RDMA_CM
);
4318 ib_unregister_client(&cma_client
);
4319 unregister_netdevice_notifier(&cma_nb
);
4320 rdma_addr_unregister_client(&addr_client
);
4321 ib_sa_unregister_client(&sa_client
);
4322 unregister_pernet_subsys(&cma_pernet_operations
);
4323 destroy_workqueue(cma_wq
);
4326 module_init(cma_init
);
4327 module_exit(cma_cleanup
);