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"
67 MODULE_AUTHOR("Sean Hefty");
68 MODULE_DESCRIPTION("Generic RDMA CM Agent");
69 MODULE_LICENSE("Dual BSD/GPL");
71 #define CMA_CM_RESPONSE_TIMEOUT 20
72 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
73 #define CMA_MAX_CM_RETRIES 15
74 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
75 #define CMA_IBOE_PACKET_LIFETIME 18
76 #define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
78 static const char * const cma_events[] = {
79 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
80 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
81 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
82 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
83 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
84 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
85 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
86 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
87 [RDMA_CM_EVENT_REJECTED] = "rejected",
88 [RDMA_CM_EVENT_ESTABLISHED] = "established",
89 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
90 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
91 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
92 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
93 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
94 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
97 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
101 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
102 cma_events[index] : "unrecognized event";
104 EXPORT_SYMBOL(rdma_event_msg);
106 const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
109 if (rdma_ib_or_roce(id->device, id->port_num))
110 return ibcm_reject_msg(reason);
112 if (rdma_protocol_iwarp(id->device, id->port_num))
113 return iwcm_reject_msg(reason);
116 return "unrecognized transport";
118 EXPORT_SYMBOL(rdma_reject_msg);
120 bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
122 if (rdma_ib_or_roce(id->device, id->port_num))
123 return reason == IB_CM_REJ_CONSUMER_DEFINED;
125 if (rdma_protocol_iwarp(id->device, id->port_num))
126 return reason == -ECONNREFUSED;
131 EXPORT_SYMBOL(rdma_is_consumer_reject);
133 const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
134 struct rdma_cm_event *ev, u8 *data_len)
138 if (rdma_is_consumer_reject(id, ev->status)) {
139 *data_len = ev->param.conn.private_data_len;
140 p = ev->param.conn.private_data;
147 EXPORT_SYMBOL(rdma_consumer_reject_data);
150 * rdma_iw_cm_id() - return the iw_cm_id pointer for this cm_id.
151 * @id: Communication Identifier
153 struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
155 struct rdma_id_private *id_priv;
157 id_priv = container_of(id, struct rdma_id_private, id);
158 if (id->device->node_type == RDMA_NODE_RNIC)
159 return id_priv->cm_id.iw;
162 EXPORT_SYMBOL(rdma_iw_cm_id);
165 * rdma_res_to_id() - return the rdma_cm_id pointer for this restrack.
166 * @res: rdma resource tracking entry pointer
168 struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
170 struct rdma_id_private *id_priv =
171 container_of(res, struct rdma_id_private, res);
175 EXPORT_SYMBOL(rdma_res_to_id);
177 static void cma_add_one(struct ib_device *device);
178 static void cma_remove_one(struct ib_device *device, void *client_data);
180 static struct ib_client cma_client = {
183 .remove = cma_remove_one
186 static struct ib_sa_client sa_client;
187 static LIST_HEAD(dev_list);
188 static LIST_HEAD(listen_any_list);
189 static DEFINE_MUTEX(lock);
190 static struct workqueue_struct *cma_wq;
191 static unsigned int cma_pernet_id;
200 static struct cma_pernet *cma_pernet(struct net *net)
202 return net_generic(net, cma_pernet_id);
205 static struct idr *cma_pernet_idr(struct net *net, enum rdma_ucm_port_space ps)
207 struct cma_pernet *pernet = cma_pernet(net);
211 return &pernet->tcp_ps;
213 return &pernet->udp_ps;
215 return &pernet->ipoib_ps;
217 return &pernet->ib_ps;
224 struct list_head list;
225 struct ib_device *device;
226 struct completion comp;
228 struct list_head id_list;
229 enum ib_gid_type *default_gid_type;
230 u8 *default_roce_tos;
233 struct rdma_bind_list {
234 enum rdma_ucm_port_space ps;
235 struct hlist_head owners;
239 struct class_port_info_context {
240 struct ib_class_port_info *class_port_info;
241 struct ib_device *device;
242 struct completion done;
243 struct ib_sa_query *sa_query;
247 static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
248 struct rdma_bind_list *bind_list, int snum)
250 struct idr *idr = cma_pernet_idr(net, ps);
252 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
255 static struct rdma_bind_list *cma_ps_find(struct net *net,
256 enum rdma_ucm_port_space ps, int snum)
258 struct idr *idr = cma_pernet_idr(net, ps);
260 return idr_find(idr, snum);
263 static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
266 struct idr *idr = cma_pernet_idr(net, ps);
268 idr_remove(idr, snum);
275 void cma_ref_dev(struct cma_device *cma_dev)
277 atomic_inc(&cma_dev->refcount);
280 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
283 struct cma_device *cma_dev;
284 struct cma_device *found_cma_dev = NULL;
288 list_for_each_entry(cma_dev, &dev_list, list)
289 if (filter(cma_dev->device, cookie)) {
290 found_cma_dev = cma_dev;
295 cma_ref_dev(found_cma_dev);
297 return found_cma_dev;
300 int cma_get_default_gid_type(struct cma_device *cma_dev,
303 if (!rdma_is_port_valid(cma_dev->device, port))
306 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
309 int cma_set_default_gid_type(struct cma_device *cma_dev,
311 enum ib_gid_type default_gid_type)
313 unsigned long supported_gids;
315 if (!rdma_is_port_valid(cma_dev->device, port))
318 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
320 if (!(supported_gids & 1 << default_gid_type))
323 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
329 int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
331 if (!rdma_is_port_valid(cma_dev->device, port))
334 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
337 int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
340 if (!rdma_is_port_valid(cma_dev->device, port))
343 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
348 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
350 return cma_dev->device;
354 * Device removal can occur at anytime, so we need extra handling to
355 * serialize notifying the user of device removal with other callbacks.
356 * We do this by disabling removal notification while a callback is in process,
357 * and reporting it after the callback completes.
360 struct cma_multicast {
361 struct rdma_id_private *id_priv;
363 struct ib_sa_multicast *ib;
365 struct list_head list;
367 struct sockaddr_storage addr;
373 struct work_struct work;
374 struct rdma_id_private *id;
375 enum rdma_cm_state old_state;
376 enum rdma_cm_state new_state;
377 struct rdma_cm_event event;
380 struct cma_ndev_work {
381 struct work_struct work;
382 struct rdma_id_private *id;
383 struct rdma_cm_event event;
386 struct iboe_mcast_work {
387 struct work_struct work;
388 struct rdma_id_private *id;
389 struct cma_multicast *mc;
402 u8 ip_version; /* IP version: 7:4 */
404 union cma_ip_addr src_addr;
405 union cma_ip_addr dst_addr;
408 #define CMA_VERSION 0x00
410 struct cma_req_info {
411 struct sockaddr_storage listen_addr_storage;
412 struct sockaddr_storage src_addr_storage;
413 struct ib_device *device;
414 union ib_gid local_gid;
421 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
426 spin_lock_irqsave(&id_priv->lock, flags);
427 ret = (id_priv->state == comp);
428 spin_unlock_irqrestore(&id_priv->lock, flags);
432 static int cma_comp_exch(struct rdma_id_private *id_priv,
433 enum rdma_cm_state comp, enum rdma_cm_state exch)
438 spin_lock_irqsave(&id_priv->lock, flags);
439 if ((ret = (id_priv->state == comp)))
440 id_priv->state = exch;
441 spin_unlock_irqrestore(&id_priv->lock, flags);
445 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
446 enum rdma_cm_state exch)
449 enum rdma_cm_state old;
451 spin_lock_irqsave(&id_priv->lock, flags);
452 old = id_priv->state;
453 id_priv->state = exch;
454 spin_unlock_irqrestore(&id_priv->lock, flags);
458 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
460 return hdr->ip_version >> 4;
463 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
465 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
468 static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
470 struct in_device *in_dev = NULL;
474 in_dev = __in_dev_get_rtnl(ndev);
477 ip_mc_inc_group(in_dev,
478 *(__be32 *)(mgid->raw + 12));
480 ip_mc_dec_group(in_dev,
481 *(__be32 *)(mgid->raw + 12));
485 return (in_dev) ? 0 : -ENODEV;
488 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
489 struct cma_device *cma_dev)
491 cma_ref_dev(cma_dev);
492 id_priv->cma_dev = cma_dev;
493 id_priv->id.device = cma_dev->device;
494 id_priv->id.route.addr.dev_addr.transport =
495 rdma_node_get_transport(cma_dev->device->node_type);
496 list_add_tail(&id_priv->list, &cma_dev->id_list);
497 rdma_restrack_add(&id_priv->res);
500 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
501 struct cma_device *cma_dev)
503 _cma_attach_to_dev(id_priv, cma_dev);
505 cma_dev->default_gid_type[id_priv->id.port_num -
506 rdma_start_port(cma_dev->device)];
509 void cma_deref_dev(struct cma_device *cma_dev)
511 if (atomic_dec_and_test(&cma_dev->refcount))
512 complete(&cma_dev->comp);
515 static inline void release_mc(struct kref *kref)
517 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
519 kfree(mc->multicast.ib);
523 static void cma_release_dev(struct rdma_id_private *id_priv)
526 list_del(&id_priv->list);
527 cma_deref_dev(id_priv->cma_dev);
528 id_priv->cma_dev = NULL;
532 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
534 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
537 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
539 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
542 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
544 return id_priv->id.route.addr.src_addr.ss_family;
547 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
549 struct ib_sa_mcmember_rec rec;
553 if (qkey && id_priv->qkey != qkey)
559 id_priv->qkey = qkey;
563 switch (id_priv->id.ps) {
566 id_priv->qkey = RDMA_UDP_QKEY;
569 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
570 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
571 id_priv->id.port_num, &rec.mgid,
574 id_priv->qkey = be32_to_cpu(rec.qkey);
582 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
584 dev_addr->dev_type = ARPHRD_INFINIBAND;
585 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
586 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
589 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
593 if (addr->sa_family != AF_IB) {
594 ret = rdma_translate_ip(addr, dev_addr);
596 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
603 static const struct ib_gid_attr *
604 cma_validate_port(struct ib_device *device, u8 port,
605 enum ib_gid_type gid_type,
607 struct rdma_id_private *id_priv)
609 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
610 int bound_if_index = dev_addr->bound_dev_if;
611 const struct ib_gid_attr *sgid_attr;
612 int dev_type = dev_addr->dev_type;
613 struct net_device *ndev = NULL;
615 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
616 return ERR_PTR(-ENODEV);
618 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
619 return ERR_PTR(-ENODEV);
621 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
622 ndev = dev_get_by_index(dev_addr->net, bound_if_index);
624 return ERR_PTR(-ENODEV);
626 gid_type = IB_GID_TYPE_IB;
629 sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
635 static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
636 const struct ib_gid_attr *sgid_attr)
638 WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
639 id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
642 static int cma_acquire_dev(struct rdma_id_private *id_priv,
643 const struct rdma_id_private *listen_id_priv)
645 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
646 const struct ib_gid_attr *sgid_attr;
647 struct cma_device *cma_dev;
648 union ib_gid gid, iboe_gid, *gidp;
649 enum ib_gid_type gid_type;
653 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
654 id_priv->id.ps == RDMA_PS_IPOIB)
658 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
661 memcpy(&gid, dev_addr->src_dev_addr +
662 rdma_addr_gid_offset(dev_addr), sizeof gid);
664 if (listen_id_priv) {
665 cma_dev = listen_id_priv->cma_dev;
666 port = listen_id_priv->id.port_num;
667 gidp = rdma_protocol_roce(cma_dev->device, port) ?
669 gid_type = listen_id_priv->gid_type;
670 sgid_attr = cma_validate_port(cma_dev->device, port,
671 gid_type, gidp, id_priv);
672 if (!IS_ERR(sgid_attr)) {
673 id_priv->id.port_num = port;
674 cma_bind_sgid_attr(id_priv, sgid_attr);
680 list_for_each_entry(cma_dev, &dev_list, list) {
681 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
682 if (listen_id_priv &&
683 listen_id_priv->cma_dev == cma_dev &&
684 listen_id_priv->id.port_num == port)
687 gidp = rdma_protocol_roce(cma_dev->device, port) ?
689 gid_type = cma_dev->default_gid_type[port - 1];
690 sgid_attr = cma_validate_port(cma_dev->device, port,
691 gid_type, gidp, id_priv);
692 if (!IS_ERR(sgid_attr)) {
693 id_priv->id.port_num = port;
694 cma_bind_sgid_attr(id_priv, sgid_attr);
703 cma_attach_to_dev(id_priv, cma_dev);
710 * Select the source IB device and address to reach the destination IB address.
712 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
714 struct cma_device *cma_dev, *cur_dev;
715 struct sockaddr_ib *addr;
716 union ib_gid gid, sgid, *dgid;
719 enum ib_port_state port_state;
723 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
724 dgid = (union ib_gid *) &addr->sib_addr;
725 pkey = ntohs(addr->sib_pkey);
728 list_for_each_entry(cur_dev, &dev_list, list) {
729 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
730 if (!rdma_cap_af_ib(cur_dev->device, p))
733 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
736 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
738 for (i = 0; !rdma_query_gid(cur_dev->device,
741 if (!memcmp(&gid, dgid, sizeof(gid))) {
744 id_priv->id.port_num = p;
748 if (!cma_dev && (gid.global.subnet_prefix ==
749 dgid->global.subnet_prefix) &&
750 port_state == IB_PORT_ACTIVE) {
753 id_priv->id.port_num = p;
763 cma_attach_to_dev(id_priv, cma_dev);
765 addr = (struct sockaddr_ib *)cma_src_addr(id_priv);
766 memcpy(&addr->sib_addr, &sgid, sizeof(sgid));
767 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
771 static void cma_deref_id(struct rdma_id_private *id_priv)
773 if (atomic_dec_and_test(&id_priv->refcount))
774 complete(&id_priv->comp);
777 struct rdma_cm_id *__rdma_create_id(struct net *net,
778 rdma_cm_event_handler event_handler,
779 void *context, enum rdma_ucm_port_space ps,
780 enum ib_qp_type qp_type, const char *caller)
782 struct rdma_id_private *id_priv;
784 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
786 return ERR_PTR(-ENOMEM);
789 id_priv->res.kern_name = caller;
791 rdma_restrack_set_task(&id_priv->res, current);
792 id_priv->res.type = RDMA_RESTRACK_CM_ID;
793 id_priv->state = RDMA_CM_IDLE;
794 id_priv->id.context = context;
795 id_priv->id.event_handler = event_handler;
797 id_priv->id.qp_type = qp_type;
798 id_priv->tos_set = false;
799 id_priv->gid_type = IB_GID_TYPE_IB;
800 spin_lock_init(&id_priv->lock);
801 mutex_init(&id_priv->qp_mutex);
802 init_completion(&id_priv->comp);
803 atomic_set(&id_priv->refcount, 1);
804 mutex_init(&id_priv->handler_mutex);
805 INIT_LIST_HEAD(&id_priv->listen_list);
806 INIT_LIST_HEAD(&id_priv->mc_list);
807 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
808 id_priv->id.route.addr.dev_addr.net = get_net(net);
809 id_priv->seq_num &= 0x00ffffff;
813 EXPORT_SYMBOL(__rdma_create_id);
815 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
817 struct ib_qp_attr qp_attr;
818 int qp_attr_mask, ret;
820 qp_attr.qp_state = IB_QPS_INIT;
821 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
825 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
829 qp_attr.qp_state = IB_QPS_RTR;
830 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
834 qp_attr.qp_state = IB_QPS_RTS;
836 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
841 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
843 struct ib_qp_attr qp_attr;
844 int qp_attr_mask, ret;
846 qp_attr.qp_state = IB_QPS_INIT;
847 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
851 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
854 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
855 struct ib_qp_init_attr *qp_init_attr)
857 struct rdma_id_private *id_priv;
861 id_priv = container_of(id, struct rdma_id_private, id);
862 if (id->device != pd->device)
865 qp_init_attr->port_num = id->port_num;
866 qp = ib_create_qp(pd, qp_init_attr);
870 if (id->qp_type == IB_QPT_UD)
871 ret = cma_init_ud_qp(id_priv, qp);
873 ret = cma_init_conn_qp(id_priv, qp);
878 id_priv->qp_num = qp->qp_num;
879 id_priv->srq = (qp->srq != NULL);
885 EXPORT_SYMBOL(rdma_create_qp);
887 void rdma_destroy_qp(struct rdma_cm_id *id)
889 struct rdma_id_private *id_priv;
891 id_priv = container_of(id, struct rdma_id_private, id);
892 mutex_lock(&id_priv->qp_mutex);
893 ib_destroy_qp(id_priv->id.qp);
894 id_priv->id.qp = NULL;
895 mutex_unlock(&id_priv->qp_mutex);
897 EXPORT_SYMBOL(rdma_destroy_qp);
899 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
900 struct rdma_conn_param *conn_param)
902 struct ib_qp_attr qp_attr;
903 int qp_attr_mask, ret;
905 mutex_lock(&id_priv->qp_mutex);
906 if (!id_priv->id.qp) {
911 /* Need to update QP attributes from default values. */
912 qp_attr.qp_state = IB_QPS_INIT;
913 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
917 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
921 qp_attr.qp_state = IB_QPS_RTR;
922 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
926 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
929 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
930 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
932 mutex_unlock(&id_priv->qp_mutex);
936 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
937 struct rdma_conn_param *conn_param)
939 struct ib_qp_attr qp_attr;
940 int qp_attr_mask, ret;
942 mutex_lock(&id_priv->qp_mutex);
943 if (!id_priv->id.qp) {
948 qp_attr.qp_state = IB_QPS_RTS;
949 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
954 qp_attr.max_rd_atomic = conn_param->initiator_depth;
955 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
957 mutex_unlock(&id_priv->qp_mutex);
961 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
963 struct ib_qp_attr qp_attr;
966 mutex_lock(&id_priv->qp_mutex);
967 if (!id_priv->id.qp) {
972 qp_attr.qp_state = IB_QPS_ERR;
973 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
975 mutex_unlock(&id_priv->qp_mutex);
979 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
980 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
982 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
986 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
989 pkey = ib_addr_get_pkey(dev_addr);
991 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
992 pkey, &qp_attr->pkey_index);
996 qp_attr->port_num = id_priv->id.port_num;
997 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
999 if (id_priv->id.qp_type == IB_QPT_UD) {
1000 ret = cma_set_qkey(id_priv, 0);
1004 qp_attr->qkey = id_priv->qkey;
1005 *qp_attr_mask |= IB_QP_QKEY;
1007 qp_attr->qp_access_flags = 0;
1008 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1013 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1016 struct rdma_id_private *id_priv;
1019 id_priv = container_of(id, struct rdma_id_private, id);
1020 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1021 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1022 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1024 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1027 if (qp_attr->qp_state == IB_QPS_RTR)
1028 qp_attr->rq_psn = id_priv->seq_num;
1029 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1030 if (!id_priv->cm_id.iw) {
1031 qp_attr->qp_access_flags = 0;
1032 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1034 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1036 qp_attr->port_num = id_priv->id.port_num;
1037 *qp_attr_mask |= IB_QP_PORT;
1043 EXPORT_SYMBOL(rdma_init_qp_attr);
1045 static inline bool cma_zero_addr(const struct sockaddr *addr)
1047 switch (addr->sa_family) {
1049 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1051 return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
1053 return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
1059 static inline bool cma_loopback_addr(const struct sockaddr *addr)
1061 switch (addr->sa_family) {
1063 return ipv4_is_loopback(
1064 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
1066 return ipv6_addr_loopback(
1067 &((struct sockaddr_in6 *)addr)->sin6_addr);
1069 return ib_addr_loopback(
1070 &((struct sockaddr_ib *)addr)->sib_addr);
1076 static inline bool cma_any_addr(const struct sockaddr *addr)
1078 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1081 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1083 if (src->sa_family != dst->sa_family)
1086 switch (src->sa_family) {
1088 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1089 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1091 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1092 &((struct sockaddr_in6 *) dst)->sin6_addr);
1094 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1095 &((struct sockaddr_ib *) dst)->sib_addr);
1099 static __be16 cma_port(const struct sockaddr *addr)
1101 struct sockaddr_ib *sib;
1103 switch (addr->sa_family) {
1105 return ((struct sockaddr_in *) addr)->sin_port;
1107 return ((struct sockaddr_in6 *) addr)->sin6_port;
1109 sib = (struct sockaddr_ib *) addr;
1110 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1111 be64_to_cpu(sib->sib_sid_mask)));
1117 static inline int cma_any_port(const struct sockaddr *addr)
1119 return !cma_port(addr);
1122 static void cma_save_ib_info(struct sockaddr *src_addr,
1123 struct sockaddr *dst_addr,
1124 const struct rdma_cm_id *listen_id,
1125 const struct sa_path_rec *path)
1127 struct sockaddr_ib *listen_ib, *ib;
1129 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1131 ib = (struct sockaddr_ib *)src_addr;
1132 ib->sib_family = AF_IB;
1134 ib->sib_pkey = path->pkey;
1135 ib->sib_flowinfo = path->flow_label;
1136 memcpy(&ib->sib_addr, &path->sgid, 16);
1137 ib->sib_sid = path->service_id;
1138 ib->sib_scope_id = 0;
1140 ib->sib_pkey = listen_ib->sib_pkey;
1141 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1142 ib->sib_addr = listen_ib->sib_addr;
1143 ib->sib_sid = listen_ib->sib_sid;
1144 ib->sib_scope_id = listen_ib->sib_scope_id;
1146 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1149 ib = (struct sockaddr_ib *)dst_addr;
1150 ib->sib_family = AF_IB;
1152 ib->sib_pkey = path->pkey;
1153 ib->sib_flowinfo = path->flow_label;
1154 memcpy(&ib->sib_addr, &path->dgid, 16);
1159 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1160 struct sockaddr_in *dst_addr,
1161 struct cma_hdr *hdr,
1165 *src_addr = (struct sockaddr_in) {
1166 .sin_family = AF_INET,
1167 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1168 .sin_port = local_port,
1173 *dst_addr = (struct sockaddr_in) {
1174 .sin_family = AF_INET,
1175 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1176 .sin_port = hdr->port,
1181 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1182 struct sockaddr_in6 *dst_addr,
1183 struct cma_hdr *hdr,
1187 *src_addr = (struct sockaddr_in6) {
1188 .sin6_family = AF_INET6,
1189 .sin6_addr = hdr->dst_addr.ip6,
1190 .sin6_port = local_port,
1195 *dst_addr = (struct sockaddr_in6) {
1196 .sin6_family = AF_INET6,
1197 .sin6_addr = hdr->src_addr.ip6,
1198 .sin6_port = hdr->port,
1203 static u16 cma_port_from_service_id(__be64 service_id)
1205 return (u16)be64_to_cpu(service_id);
1208 static int cma_save_ip_info(struct sockaddr *src_addr,
1209 struct sockaddr *dst_addr,
1210 const struct ib_cm_event *ib_event,
1213 struct cma_hdr *hdr;
1216 hdr = ib_event->private_data;
1217 if (hdr->cma_version != CMA_VERSION)
1220 port = htons(cma_port_from_service_id(service_id));
1222 switch (cma_get_ip_ver(hdr)) {
1224 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1225 (struct sockaddr_in *)dst_addr, hdr, port);
1228 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1229 (struct sockaddr_in6 *)dst_addr, hdr, port);
1232 return -EAFNOSUPPORT;
1238 static int cma_save_net_info(struct sockaddr *src_addr,
1239 struct sockaddr *dst_addr,
1240 const struct rdma_cm_id *listen_id,
1241 const struct ib_cm_event *ib_event,
1242 sa_family_t sa_family, __be64 service_id)
1244 if (sa_family == AF_IB) {
1245 if (ib_event->event == IB_CM_REQ_RECEIVED)
1246 cma_save_ib_info(src_addr, dst_addr, listen_id,
1247 ib_event->param.req_rcvd.primary_path);
1248 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1249 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1253 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1256 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1257 struct cma_req_info *req)
1259 const struct ib_cm_req_event_param *req_param =
1260 &ib_event->param.req_rcvd;
1261 const struct ib_cm_sidr_req_event_param *sidr_param =
1262 &ib_event->param.sidr_req_rcvd;
1264 switch (ib_event->event) {
1265 case IB_CM_REQ_RECEIVED:
1266 req->device = req_param->listen_id->device;
1267 req->port = req_param->port;
1268 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1269 sizeof(req->local_gid));
1270 req->has_gid = true;
1271 req->service_id = req_param->primary_path->service_id;
1272 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1273 if (req->pkey != req_param->bth_pkey)
1274 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1275 "RDMA CMA: in the future this may cause the request to be dropped\n",
1276 req_param->bth_pkey, req->pkey);
1278 case IB_CM_SIDR_REQ_RECEIVED:
1279 req->device = sidr_param->listen_id->device;
1280 req->port = sidr_param->port;
1281 req->has_gid = false;
1282 req->service_id = sidr_param->service_id;
1283 req->pkey = sidr_param->pkey;
1284 if (req->pkey != sidr_param->bth_pkey)
1285 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1286 "RDMA CMA: in the future this may cause the request to be dropped\n",
1287 sidr_param->bth_pkey, req->pkey);
1296 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1297 const struct sockaddr_in *dst_addr,
1298 const struct sockaddr_in *src_addr)
1300 __be32 daddr = dst_addr->sin_addr.s_addr,
1301 saddr = src_addr->sin_addr.s_addr;
1302 struct fib_result res;
1307 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1308 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1309 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1310 ipv4_is_loopback(saddr))
1313 memset(&fl4, 0, sizeof(fl4));
1314 fl4.flowi4_iif = net_dev->ifindex;
1319 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1320 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1326 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1327 const struct sockaddr_in6 *dst_addr,
1328 const struct sockaddr_in6 *src_addr)
1330 #if IS_ENABLED(CONFIG_IPV6)
1331 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1332 IPV6_ADDR_LINKLOCAL;
1333 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1334 &src_addr->sin6_addr, net_dev->ifindex,
1341 ret = rt->rt6i_idev->dev == net_dev;
1350 static bool validate_net_dev(struct net_device *net_dev,
1351 const struct sockaddr *daddr,
1352 const struct sockaddr *saddr)
1354 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1355 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1356 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1357 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1359 switch (daddr->sa_family) {
1361 return saddr->sa_family == AF_INET &&
1362 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1365 return saddr->sa_family == AF_INET6 &&
1366 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1373 static struct net_device *
1374 roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
1376 const struct ib_gid_attr *sgid_attr = NULL;
1378 if (ib_event->event == IB_CM_REQ_RECEIVED)
1379 sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
1380 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1381 sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
1385 dev_hold(sgid_attr->ndev);
1386 return sgid_attr->ndev;
1389 static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
1390 struct cma_req_info *req)
1392 struct sockaddr *listen_addr =
1393 (struct sockaddr *)&req->listen_addr_storage;
1394 struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
1395 struct net_device *net_dev;
1396 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1399 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1402 return ERR_PTR(err);
1404 if (rdma_protocol_roce(req->device, req->port))
1405 net_dev = roce_get_net_dev_by_cm_event(ib_event);
1407 net_dev = ib_get_net_dev_by_params(req->device, req->port,
1411 return ERR_PTR(-ENODEV);
1416 static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
1418 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1421 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1422 const struct cma_hdr *hdr)
1424 struct sockaddr *addr = cma_src_addr(id_priv);
1426 struct in6_addr ip6_addr;
1428 if (cma_any_addr(addr) && !id_priv->afonly)
1431 switch (addr->sa_family) {
1433 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1434 if (cma_get_ip_ver(hdr) != 4)
1436 if (!cma_any_addr(addr) &&
1437 hdr->dst_addr.ip4.addr != ip4_addr)
1441 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1442 if (cma_get_ip_ver(hdr) != 6)
1444 if (!cma_any_addr(addr) &&
1445 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1457 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1459 struct ib_device *device = id->device;
1460 const int port_num = id->port_num ?: rdma_start_port(device);
1462 return rdma_protocol_roce(device, port_num);
1465 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1466 const struct net_device *net_dev,
1469 const struct rdma_addr *addr = &id->route.addr;
1472 /* This request is an AF_IB request */
1473 return (!id->port_num || id->port_num == port_num) &&
1474 (addr->src_addr.ss_family == AF_IB);
1477 * Net namespaces must match, and if the listner is listening
1478 * on a specific netdevice than netdevice must match as well.
1480 if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1481 (!!addr->dev_addr.bound_dev_if ==
1482 (addr->dev_addr.bound_dev_if == net_dev->ifindex)))
1488 static struct rdma_id_private *cma_find_listener(
1489 const struct rdma_bind_list *bind_list,
1490 const struct ib_cm_id *cm_id,
1491 const struct ib_cm_event *ib_event,
1492 const struct cma_req_info *req,
1493 const struct net_device *net_dev)
1495 struct rdma_id_private *id_priv, *id_priv_dev;
1498 return ERR_PTR(-EINVAL);
1500 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1501 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1502 if (id_priv->id.device == cm_id->device &&
1503 cma_match_net_dev(&id_priv->id, net_dev, req->port))
1505 list_for_each_entry(id_priv_dev,
1506 &id_priv->listen_list,
1508 if (id_priv_dev->id.device == cm_id->device &&
1509 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1515 return ERR_PTR(-EINVAL);
1518 static struct rdma_id_private *
1519 cma_ib_id_from_event(struct ib_cm_id *cm_id,
1520 const struct ib_cm_event *ib_event,
1521 struct net_device **net_dev)
1523 struct cma_req_info req;
1524 struct rdma_bind_list *bind_list;
1525 struct rdma_id_private *id_priv;
1528 err = cma_save_req_info(ib_event, &req);
1530 return ERR_PTR(err);
1532 *net_dev = cma_get_net_dev(ib_event, &req);
1533 if (IS_ERR(*net_dev)) {
1534 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1535 /* Assuming the protocol is AF_IB */
1538 return ERR_CAST(*net_dev);
1543 * Net namespace might be getting deleted while route lookup,
1544 * cm_id lookup is in progress. Therefore, perform netdevice
1545 * validation, cm_id lookup under rcu lock.
1546 * RCU lock along with netdevice state check, synchronizes with
1547 * netdevice migrating to different net namespace and also avoids
1548 * case where net namespace doesn't get deleted while lookup is in
1550 * If the device state is not IFF_UP, its properties such as ifindex
1551 * and nd_net cannot be trusted to remain valid without rcu lock.
1552 * net/core/dev.c change_net_namespace() ensures to synchronize with
1553 * ongoing operations on net device after device is closed using
1554 * synchronize_net().
1559 * If netdevice is down, it is likely that it is administratively
1560 * down or it might be migrating to different namespace.
1561 * In that case avoid further processing, as the net namespace
1562 * or ifindex may change.
1564 if (((*net_dev)->flags & IFF_UP) == 0) {
1565 id_priv = ERR_PTR(-EHOSTUNREACH);
1569 if (!validate_net_dev(*net_dev,
1570 (struct sockaddr *)&req.listen_addr_storage,
1571 (struct sockaddr *)&req.src_addr_storage)) {
1572 id_priv = ERR_PTR(-EHOSTUNREACH);
1577 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1578 rdma_ps_from_service_id(req.service_id),
1579 cma_port_from_service_id(req.service_id));
1580 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1583 if (IS_ERR(id_priv) && *net_dev) {
1590 static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
1592 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1595 static void cma_cancel_route(struct rdma_id_private *id_priv)
1597 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1599 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1603 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1605 struct rdma_id_private *dev_id_priv;
1608 * Remove from listen_any_list to prevent added devices from spawning
1609 * additional listen requests.
1612 list_del(&id_priv->list);
1614 while (!list_empty(&id_priv->listen_list)) {
1615 dev_id_priv = list_entry(id_priv->listen_list.next,
1616 struct rdma_id_private, listen_list);
1617 /* sync with device removal to avoid duplicate destruction */
1618 list_del_init(&dev_id_priv->list);
1619 list_del(&dev_id_priv->listen_list);
1620 mutex_unlock(&lock);
1622 rdma_destroy_id(&dev_id_priv->id);
1625 mutex_unlock(&lock);
1628 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1629 enum rdma_cm_state state)
1632 case RDMA_CM_ADDR_QUERY:
1633 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1635 case RDMA_CM_ROUTE_QUERY:
1636 cma_cancel_route(id_priv);
1638 case RDMA_CM_LISTEN:
1639 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1640 cma_cancel_listens(id_priv);
1647 static void cma_release_port(struct rdma_id_private *id_priv)
1649 struct rdma_bind_list *bind_list = id_priv->bind_list;
1650 struct net *net = id_priv->id.route.addr.dev_addr.net;
1656 hlist_del(&id_priv->node);
1657 if (hlist_empty(&bind_list->owners)) {
1658 cma_ps_remove(net, bind_list->ps, bind_list->port);
1661 mutex_unlock(&lock);
1664 static void cma_leave_roce_mc_group(struct rdma_id_private *id_priv,
1665 struct cma_multicast *mc)
1667 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1668 struct net_device *ndev = NULL;
1670 if (dev_addr->bound_dev_if)
1671 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
1673 cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, false);
1676 kref_put(&mc->mcref, release_mc);
1679 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1681 struct cma_multicast *mc;
1683 while (!list_empty(&id_priv->mc_list)) {
1684 mc = container_of(id_priv->mc_list.next,
1685 struct cma_multicast, list);
1686 list_del(&mc->list);
1687 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1688 id_priv->id.port_num)) {
1689 ib_sa_free_multicast(mc->multicast.ib);
1692 cma_leave_roce_mc_group(id_priv, mc);
1697 void rdma_destroy_id(struct rdma_cm_id *id)
1699 struct rdma_id_private *id_priv;
1700 enum rdma_cm_state state;
1702 id_priv = container_of(id, struct rdma_id_private, id);
1703 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1704 cma_cancel_operation(id_priv, state);
1707 * Wait for any active callback to finish. New callbacks will find
1708 * the id_priv state set to destroying and abort.
1710 mutex_lock(&id_priv->handler_mutex);
1711 mutex_unlock(&id_priv->handler_mutex);
1713 if (id_priv->cma_dev) {
1714 rdma_restrack_del(&id_priv->res);
1715 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1716 if (id_priv->cm_id.ib)
1717 ib_destroy_cm_id(id_priv->cm_id.ib);
1718 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1719 if (id_priv->cm_id.iw)
1720 iw_destroy_cm_id(id_priv->cm_id.iw);
1722 cma_leave_mc_groups(id_priv);
1723 cma_release_dev(id_priv);
1726 cma_release_port(id_priv);
1727 cma_deref_id(id_priv);
1728 wait_for_completion(&id_priv->comp);
1730 if (id_priv->internal_id)
1731 cma_deref_id(id_priv->id.context);
1733 kfree(id_priv->id.route.path_rec);
1735 if (id_priv->id.route.addr.dev_addr.sgid_attr)
1736 rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
1738 put_net(id_priv->id.route.addr.dev_addr.net);
1741 EXPORT_SYMBOL(rdma_destroy_id);
1743 static int cma_rep_recv(struct rdma_id_private *id_priv)
1747 ret = cma_modify_qp_rtr(id_priv, NULL);
1751 ret = cma_modify_qp_rts(id_priv, NULL);
1755 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1761 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1762 cma_modify_qp_err(id_priv);
1763 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1768 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1769 const struct ib_cm_rep_event_param *rep_data,
1772 event->param.conn.private_data = private_data;
1773 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1774 event->param.conn.responder_resources = rep_data->responder_resources;
1775 event->param.conn.initiator_depth = rep_data->initiator_depth;
1776 event->param.conn.flow_control = rep_data->flow_control;
1777 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1778 event->param.conn.srq = rep_data->srq;
1779 event->param.conn.qp_num = rep_data->remote_qpn;
1782 static int cma_ib_handler(struct ib_cm_id *cm_id,
1783 const struct ib_cm_event *ib_event)
1785 struct rdma_id_private *id_priv = cm_id->context;
1786 struct rdma_cm_event event = {};
1789 mutex_lock(&id_priv->handler_mutex);
1790 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1791 id_priv->state != RDMA_CM_CONNECT) ||
1792 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1793 id_priv->state != RDMA_CM_DISCONNECT))
1796 switch (ib_event->event) {
1797 case IB_CM_REQ_ERROR:
1798 case IB_CM_REP_ERROR:
1799 event.event = RDMA_CM_EVENT_UNREACHABLE;
1800 event.status = -ETIMEDOUT;
1802 case IB_CM_REP_RECEIVED:
1803 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1804 (id_priv->id.qp_type != IB_QPT_UD))
1805 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1806 if (id_priv->id.qp) {
1807 event.status = cma_rep_recv(id_priv);
1808 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1809 RDMA_CM_EVENT_ESTABLISHED;
1811 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1813 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1814 ib_event->private_data);
1816 case IB_CM_RTU_RECEIVED:
1817 case IB_CM_USER_ESTABLISHED:
1818 event.event = RDMA_CM_EVENT_ESTABLISHED;
1820 case IB_CM_DREQ_ERROR:
1821 event.status = -ETIMEDOUT; /* fall through */
1822 case IB_CM_DREQ_RECEIVED:
1823 case IB_CM_DREP_RECEIVED:
1824 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1825 RDMA_CM_DISCONNECT))
1827 event.event = RDMA_CM_EVENT_DISCONNECTED;
1829 case IB_CM_TIMEWAIT_EXIT:
1830 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1832 case IB_CM_MRA_RECEIVED:
1835 case IB_CM_REJ_RECEIVED:
1836 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1837 ib_event->param.rej_rcvd.reason));
1838 cma_modify_qp_err(id_priv);
1839 event.status = ib_event->param.rej_rcvd.reason;
1840 event.event = RDMA_CM_EVENT_REJECTED;
1841 event.param.conn.private_data = ib_event->private_data;
1842 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1845 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1850 ret = id_priv->id.event_handler(&id_priv->id, &event);
1852 /* Destroy the CM ID by returning a non-zero value. */
1853 id_priv->cm_id.ib = NULL;
1854 cma_exch(id_priv, RDMA_CM_DESTROYING);
1855 mutex_unlock(&id_priv->handler_mutex);
1856 rdma_destroy_id(&id_priv->id);
1860 mutex_unlock(&id_priv->handler_mutex);
1864 static struct rdma_id_private *
1865 cma_ib_new_conn_id(const struct rdma_cm_id *listen_id,
1866 const struct ib_cm_event *ib_event,
1867 struct net_device *net_dev)
1869 struct rdma_id_private *listen_id_priv;
1870 struct rdma_id_private *id_priv;
1871 struct rdma_cm_id *id;
1872 struct rdma_route *rt;
1873 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1874 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
1875 const __be64 service_id =
1876 ib_event->param.req_rcvd.primary_path->service_id;
1879 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
1880 id = __rdma_create_id(listen_id->route.addr.dev_addr.net,
1881 listen_id->event_handler, listen_id->context,
1882 listen_id->ps, ib_event->param.req_rcvd.qp_type,
1883 listen_id_priv->res.kern_name);
1887 id_priv = container_of(id, struct rdma_id_private, id);
1888 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1889 (struct sockaddr *)&id->route.addr.dst_addr,
1890 listen_id, ib_event, ss_family, service_id))
1894 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1895 rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
1900 rt->path_rec[0] = *path;
1901 if (rt->num_paths == 2)
1902 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1905 rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1907 if (!cma_protocol_roce(listen_id) &&
1908 cma_any_addr(cma_src_addr(id_priv))) {
1909 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1910 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1911 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1912 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1913 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1918 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1920 id_priv->state = RDMA_CM_CONNECT;
1924 rdma_destroy_id(id);
1928 static struct rdma_id_private *
1929 cma_ib_new_udp_id(const struct rdma_cm_id *listen_id,
1930 const struct ib_cm_event *ib_event,
1931 struct net_device *net_dev)
1933 const struct rdma_id_private *listen_id_priv;
1934 struct rdma_id_private *id_priv;
1935 struct rdma_cm_id *id;
1936 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1937 struct net *net = listen_id->route.addr.dev_addr.net;
1940 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
1941 id = __rdma_create_id(net, listen_id->event_handler, listen_id->context,
1942 listen_id->ps, IB_QPT_UD,
1943 listen_id_priv->res.kern_name);
1947 id_priv = container_of(id, struct rdma_id_private, id);
1948 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1949 (struct sockaddr *)&id->route.addr.dst_addr,
1950 listen_id, ib_event, ss_family,
1951 ib_event->param.sidr_req_rcvd.service_id))
1955 rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1957 if (!cma_any_addr(cma_src_addr(id_priv))) {
1958 ret = cma_translate_addr(cma_src_addr(id_priv),
1959 &id->route.addr.dev_addr);
1965 id_priv->state = RDMA_CM_CONNECT;
1968 rdma_destroy_id(id);
1972 static void cma_set_req_event_data(struct rdma_cm_event *event,
1973 const struct ib_cm_req_event_param *req_data,
1974 void *private_data, int offset)
1976 event->param.conn.private_data = private_data + offset;
1977 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1978 event->param.conn.responder_resources = req_data->responder_resources;
1979 event->param.conn.initiator_depth = req_data->initiator_depth;
1980 event->param.conn.flow_control = req_data->flow_control;
1981 event->param.conn.retry_count = req_data->retry_count;
1982 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1983 event->param.conn.srq = req_data->srq;
1984 event->param.conn.qp_num = req_data->remote_qpn;
1987 static int cma_ib_check_req_qp_type(const struct rdma_cm_id *id,
1988 const struct ib_cm_event *ib_event)
1990 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1991 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1992 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1993 (id->qp_type == IB_QPT_UD)) ||
1997 static int cma_ib_req_handler(struct ib_cm_id *cm_id,
1998 const struct ib_cm_event *ib_event)
2000 struct rdma_id_private *listen_id, *conn_id = NULL;
2001 struct rdma_cm_event event = {};
2002 struct net_device *net_dev;
2006 listen_id = cma_ib_id_from_event(cm_id, ib_event, &net_dev);
2007 if (IS_ERR(listen_id))
2008 return PTR_ERR(listen_id);
2010 if (!cma_ib_check_req_qp_type(&listen_id->id, ib_event)) {
2015 mutex_lock(&listen_id->handler_mutex);
2016 if (listen_id->state != RDMA_CM_LISTEN) {
2017 ret = -ECONNABORTED;
2021 offset = cma_user_data_offset(listen_id);
2022 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2023 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
2024 conn_id = cma_ib_new_udp_id(&listen_id->id, ib_event, net_dev);
2025 event.param.ud.private_data = ib_event->private_data + offset;
2026 event.param.ud.private_data_len =
2027 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
2029 conn_id = cma_ib_new_conn_id(&listen_id->id, ib_event, net_dev);
2030 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
2031 ib_event->private_data, offset);
2038 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2039 ret = cma_acquire_dev(conn_id, listen_id);
2043 conn_id->cm_id.ib = cm_id;
2044 cm_id->context = conn_id;
2045 cm_id->cm_handler = cma_ib_handler;
2048 * Protect against the user destroying conn_id from another thread
2049 * until we're done accessing it.
2051 atomic_inc(&conn_id->refcount);
2052 ret = conn_id->id.event_handler(&conn_id->id, &event);
2056 * Acquire mutex to prevent user executing rdma_destroy_id()
2057 * while we're accessing the cm_id.
2060 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2061 (conn_id->id.qp_type != IB_QPT_UD))
2062 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2063 mutex_unlock(&lock);
2064 mutex_unlock(&conn_id->handler_mutex);
2065 mutex_unlock(&listen_id->handler_mutex);
2066 cma_deref_id(conn_id);
2072 cma_deref_id(conn_id);
2073 /* Destroy the CM ID by returning a non-zero value. */
2074 conn_id->cm_id.ib = NULL;
2076 cma_exch(conn_id, RDMA_CM_DESTROYING);
2077 mutex_unlock(&conn_id->handler_mutex);
2079 mutex_unlock(&listen_id->handler_mutex);
2081 rdma_destroy_id(&conn_id->id);
2090 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2092 if (addr->sa_family == AF_IB)
2093 return ((struct sockaddr_ib *) addr)->sib_sid;
2095 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2097 EXPORT_SYMBOL(rdma_get_service_id);
2099 void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
2102 struct rdma_addr *addr = &cm_id->route.addr;
2104 if (!cm_id->device) {
2106 memset(sgid, 0, sizeof(*sgid));
2108 memset(dgid, 0, sizeof(*dgid));
2112 if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
2114 rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
2116 rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
2119 rdma_addr_get_sgid(&addr->dev_addr, sgid);
2121 rdma_addr_get_dgid(&addr->dev_addr, dgid);
2124 EXPORT_SYMBOL(rdma_read_gids);
2126 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2128 struct rdma_id_private *id_priv = iw_id->context;
2129 struct rdma_cm_event event = {};
2131 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2132 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2134 mutex_lock(&id_priv->handler_mutex);
2135 if (id_priv->state != RDMA_CM_CONNECT)
2138 switch (iw_event->event) {
2139 case IW_CM_EVENT_CLOSE:
2140 event.event = RDMA_CM_EVENT_DISCONNECTED;
2142 case IW_CM_EVENT_CONNECT_REPLY:
2143 memcpy(cma_src_addr(id_priv), laddr,
2144 rdma_addr_size(laddr));
2145 memcpy(cma_dst_addr(id_priv), raddr,
2146 rdma_addr_size(raddr));
2147 switch (iw_event->status) {
2149 event.event = RDMA_CM_EVENT_ESTABLISHED;
2150 event.param.conn.initiator_depth = iw_event->ird;
2151 event.param.conn.responder_resources = iw_event->ord;
2155 event.event = RDMA_CM_EVENT_REJECTED;
2158 event.event = RDMA_CM_EVENT_UNREACHABLE;
2161 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2165 case IW_CM_EVENT_ESTABLISHED:
2166 event.event = RDMA_CM_EVENT_ESTABLISHED;
2167 event.param.conn.initiator_depth = iw_event->ird;
2168 event.param.conn.responder_resources = iw_event->ord;
2174 event.status = iw_event->status;
2175 event.param.conn.private_data = iw_event->private_data;
2176 event.param.conn.private_data_len = iw_event->private_data_len;
2177 ret = id_priv->id.event_handler(&id_priv->id, &event);
2179 /* Destroy the CM ID by returning a non-zero value. */
2180 id_priv->cm_id.iw = NULL;
2181 cma_exch(id_priv, RDMA_CM_DESTROYING);
2182 mutex_unlock(&id_priv->handler_mutex);
2183 rdma_destroy_id(&id_priv->id);
2188 mutex_unlock(&id_priv->handler_mutex);
2192 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2193 struct iw_cm_event *iw_event)
2195 struct rdma_cm_id *new_cm_id;
2196 struct rdma_id_private *listen_id, *conn_id;
2197 struct rdma_cm_event event = {};
2198 int ret = -ECONNABORTED;
2199 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2200 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2202 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2203 event.param.conn.private_data = iw_event->private_data;
2204 event.param.conn.private_data_len = iw_event->private_data_len;
2205 event.param.conn.initiator_depth = iw_event->ird;
2206 event.param.conn.responder_resources = iw_event->ord;
2208 listen_id = cm_id->context;
2210 mutex_lock(&listen_id->handler_mutex);
2211 if (listen_id->state != RDMA_CM_LISTEN)
2214 /* Create a new RDMA id for the new IW CM ID */
2215 new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2216 listen_id->id.event_handler,
2217 listen_id->id.context,
2218 RDMA_PS_TCP, IB_QPT_RC,
2219 listen_id->res.kern_name);
2220 if (IS_ERR(new_cm_id)) {
2224 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2225 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2226 conn_id->state = RDMA_CM_CONNECT;
2228 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
2230 mutex_unlock(&conn_id->handler_mutex);
2231 rdma_destroy_id(new_cm_id);
2235 ret = cma_acquire_dev(conn_id, listen_id);
2237 mutex_unlock(&conn_id->handler_mutex);
2238 rdma_destroy_id(new_cm_id);
2242 conn_id->cm_id.iw = cm_id;
2243 cm_id->context = conn_id;
2244 cm_id->cm_handler = cma_iw_handler;
2246 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2247 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2250 * Protect against the user destroying conn_id from another thread
2251 * until we're done accessing it.
2253 atomic_inc(&conn_id->refcount);
2254 ret = conn_id->id.event_handler(&conn_id->id, &event);
2256 /* User wants to destroy the CM ID */
2257 conn_id->cm_id.iw = NULL;
2258 cma_exch(conn_id, RDMA_CM_DESTROYING);
2259 mutex_unlock(&conn_id->handler_mutex);
2260 cma_deref_id(conn_id);
2261 rdma_destroy_id(&conn_id->id);
2265 mutex_unlock(&conn_id->handler_mutex);
2266 cma_deref_id(conn_id);
2269 mutex_unlock(&listen_id->handler_mutex);
2273 static int cma_ib_listen(struct rdma_id_private *id_priv)
2275 struct sockaddr *addr;
2276 struct ib_cm_id *id;
2279 addr = cma_src_addr(id_priv);
2280 svc_id = rdma_get_service_id(&id_priv->id, addr);
2281 id = ib_cm_insert_listen(id_priv->id.device,
2282 cma_ib_req_handler, svc_id);
2285 id_priv->cm_id.ib = id;
2290 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2293 struct iw_cm_id *id;
2295 id = iw_create_cm_id(id_priv->id.device,
2296 iw_conn_req_handler,
2301 id->tos = id_priv->tos;
2302 id_priv->cm_id.iw = id;
2304 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2305 rdma_addr_size(cma_src_addr(id_priv)));
2307 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2310 iw_destroy_cm_id(id_priv->cm_id.iw);
2311 id_priv->cm_id.iw = NULL;
2317 static int cma_listen_handler(struct rdma_cm_id *id,
2318 struct rdma_cm_event *event)
2320 struct rdma_id_private *id_priv = id->context;
2322 id->context = id_priv->id.context;
2323 id->event_handler = id_priv->id.event_handler;
2324 return id_priv->id.event_handler(id, event);
2327 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2328 struct cma_device *cma_dev)
2330 struct rdma_id_private *dev_id_priv;
2331 struct rdma_cm_id *id;
2332 struct net *net = id_priv->id.route.addr.dev_addr.net;
2335 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2338 id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2339 id_priv->id.qp_type, id_priv->res.kern_name);
2343 dev_id_priv = container_of(id, struct rdma_id_private, id);
2345 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2346 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2347 rdma_addr_size(cma_src_addr(id_priv)));
2349 _cma_attach_to_dev(dev_id_priv, cma_dev);
2350 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2351 atomic_inc(&id_priv->refcount);
2352 dev_id_priv->internal_id = 1;
2353 dev_id_priv->afonly = id_priv->afonly;
2355 ret = rdma_listen(id, id_priv->backlog);
2357 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2358 ret, cma_dev->device->name);
2361 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2363 struct cma_device *cma_dev;
2366 list_add_tail(&id_priv->list, &listen_any_list);
2367 list_for_each_entry(cma_dev, &dev_list, list)
2368 cma_listen_on_dev(id_priv, cma_dev);
2369 mutex_unlock(&lock);
2372 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2374 struct rdma_id_private *id_priv;
2376 id_priv = container_of(id, struct rdma_id_private, id);
2377 id_priv->tos = (u8) tos;
2378 id_priv->tos_set = true;
2380 EXPORT_SYMBOL(rdma_set_service_type);
2382 static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2385 struct cma_work *work = context;
2386 struct rdma_route *route;
2388 route = &work->id->id.route;
2391 route->num_paths = 1;
2392 *route->path_rec = *path_rec;
2394 work->old_state = RDMA_CM_ROUTE_QUERY;
2395 work->new_state = RDMA_CM_ADDR_RESOLVED;
2396 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2397 work->event.status = status;
2398 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2402 queue_work(cma_wq, &work->work);
2405 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2406 struct cma_work *work)
2408 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2409 struct sa_path_rec path_rec;
2410 ib_sa_comp_mask comp_mask;
2411 struct sockaddr_in6 *sin6;
2412 struct sockaddr_ib *sib;
2414 memset(&path_rec, 0, sizeof path_rec);
2416 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2417 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2419 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2420 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2421 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2422 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2423 path_rec.numb_path = 1;
2424 path_rec.reversible = 1;
2425 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2426 cma_dst_addr(id_priv));
2428 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2429 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2430 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2432 switch (cma_family(id_priv)) {
2434 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2435 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2438 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2439 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2440 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2443 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2444 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2445 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2449 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2450 id_priv->id.port_num, &path_rec,
2451 comp_mask, timeout_ms,
2452 GFP_KERNEL, cma_query_handler,
2453 work, &id_priv->query);
2455 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2458 static void cma_work_handler(struct work_struct *_work)
2460 struct cma_work *work = container_of(_work, struct cma_work, work);
2461 struct rdma_id_private *id_priv = work->id;
2464 mutex_lock(&id_priv->handler_mutex);
2465 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2468 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2469 cma_exch(id_priv, RDMA_CM_DESTROYING);
2473 mutex_unlock(&id_priv->handler_mutex);
2474 cma_deref_id(id_priv);
2476 rdma_destroy_id(&id_priv->id);
2480 static void cma_ndev_work_handler(struct work_struct *_work)
2482 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2483 struct rdma_id_private *id_priv = work->id;
2486 mutex_lock(&id_priv->handler_mutex);
2487 if (id_priv->state == RDMA_CM_DESTROYING ||
2488 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2491 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2492 cma_exch(id_priv, RDMA_CM_DESTROYING);
2497 mutex_unlock(&id_priv->handler_mutex);
2498 cma_deref_id(id_priv);
2500 rdma_destroy_id(&id_priv->id);
2504 static void cma_init_resolve_route_work(struct cma_work *work,
2505 struct rdma_id_private *id_priv)
2508 INIT_WORK(&work->work, cma_work_handler);
2509 work->old_state = RDMA_CM_ROUTE_QUERY;
2510 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2511 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2514 static void cma_init_resolve_addr_work(struct cma_work *work,
2515 struct rdma_id_private *id_priv)
2518 INIT_WORK(&work->work, cma_work_handler);
2519 work->old_state = RDMA_CM_ADDR_QUERY;
2520 work->new_state = RDMA_CM_ADDR_RESOLVED;
2521 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2524 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2526 struct rdma_route *route = &id_priv->id.route;
2527 struct cma_work *work;
2530 work = kzalloc(sizeof *work, GFP_KERNEL);
2534 cma_init_resolve_route_work(work, id_priv);
2536 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2537 if (!route->path_rec) {
2542 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2548 kfree(route->path_rec);
2549 route->path_rec = NULL;
2555 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2556 unsigned long supported_gids,
2557 enum ib_gid_type default_gid)
2559 if ((network_type == RDMA_NETWORK_IPV4 ||
2560 network_type == RDMA_NETWORK_IPV6) &&
2561 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2562 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2568 * cma_iboe_set_path_rec_l2_fields() is helper function which sets
2569 * path record type based on GID type.
2570 * It also sets up other L2 fields which includes destination mac address
2571 * netdev ifindex, of the path record.
2572 * It returns the netdev of the bound interface for this path record entry.
2574 static struct net_device *
2575 cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
2577 struct rdma_route *route = &id_priv->id.route;
2578 enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
2579 struct rdma_addr *addr = &route->addr;
2580 unsigned long supported_gids;
2581 struct net_device *ndev;
2583 if (!addr->dev_addr.bound_dev_if)
2586 ndev = dev_get_by_index(addr->dev_addr.net,
2587 addr->dev_addr.bound_dev_if);
2591 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2592 id_priv->id.port_num);
2593 gid_type = cma_route_gid_type(addr->dev_addr.network,
2596 /* Use the hint from IP Stack to select GID Type */
2597 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2598 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2599 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2601 route->path_rec->roce.route_resolved = true;
2602 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2606 int rdma_set_ib_path(struct rdma_cm_id *id,
2607 struct sa_path_rec *path_rec)
2609 struct rdma_id_private *id_priv;
2610 struct net_device *ndev;
2613 id_priv = container_of(id, struct rdma_id_private, id);
2614 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2615 RDMA_CM_ROUTE_RESOLVED))
2618 id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
2620 if (!id->route.path_rec) {
2625 if (rdma_protocol_roce(id->device, id->port_num)) {
2626 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2634 id->route.num_paths = 1;
2638 kfree(id->route.path_rec);
2639 id->route.path_rec = NULL;
2641 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2644 EXPORT_SYMBOL(rdma_set_ib_path);
2646 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2648 struct cma_work *work;
2650 work = kzalloc(sizeof *work, GFP_KERNEL);
2654 cma_init_resolve_route_work(work, id_priv);
2655 queue_work(cma_wq, &work->work);
2659 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2662 struct net_device *dev;
2664 prio = rt_tos2priority(tos);
2665 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
2667 return netdev_get_prio_tc_map(dev, prio);
2669 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2670 if (is_vlan_dev(ndev))
2671 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2672 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2677 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2679 struct rdma_route *route = &id_priv->id.route;
2680 struct rdma_addr *addr = &route->addr;
2681 struct cma_work *work;
2683 struct net_device *ndev;
2685 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2686 rdma_start_port(id_priv->cma_dev->device)];
2687 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2690 work = kzalloc(sizeof *work, GFP_KERNEL);
2694 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2695 if (!route->path_rec) {
2700 route->num_paths = 1;
2702 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2708 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2709 &route->path_rec->sgid);
2710 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2711 &route->path_rec->dgid);
2713 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2714 /* TODO: get the hoplimit from the inet/inet6 device */
2715 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2717 route->path_rec->hop_limit = 1;
2718 route->path_rec->reversible = 1;
2719 route->path_rec->pkey = cpu_to_be16(0xffff);
2720 route->path_rec->mtu_selector = IB_SA_EQ;
2721 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2722 route->path_rec->traffic_class = tos;
2723 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2724 route->path_rec->rate_selector = IB_SA_EQ;
2725 route->path_rec->rate = iboe_get_rate(ndev);
2727 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2728 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2729 if (!route->path_rec->mtu) {
2734 cma_init_resolve_route_work(work, id_priv);
2735 queue_work(cma_wq, &work->work);
2740 kfree(route->path_rec);
2741 route->path_rec = NULL;
2747 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2749 struct rdma_id_private *id_priv;
2752 id_priv = container_of(id, struct rdma_id_private, id);
2753 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2756 atomic_inc(&id_priv->refcount);
2757 if (rdma_cap_ib_sa(id->device, id->port_num))
2758 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2759 else if (rdma_protocol_roce(id->device, id->port_num))
2760 ret = cma_resolve_iboe_route(id_priv);
2761 else if (rdma_protocol_iwarp(id->device, id->port_num))
2762 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2771 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2772 cma_deref_id(id_priv);
2775 EXPORT_SYMBOL(rdma_resolve_route);
2777 static void cma_set_loopback(struct sockaddr *addr)
2779 switch (addr->sa_family) {
2781 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2784 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2788 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2794 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2796 struct cma_device *cma_dev, *cur_dev;
2798 enum ib_port_state port_state;
2805 list_for_each_entry(cur_dev, &dev_list, list) {
2806 if (cma_family(id_priv) == AF_IB &&
2807 !rdma_cap_ib_cm(cur_dev->device, 1))
2813 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2814 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2815 port_state == IB_PORT_ACTIVE) {
2830 ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
2834 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2838 id_priv->id.route.addr.dev_addr.dev_type =
2839 (rdma_protocol_ib(cma_dev->device, p)) ?
2840 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2842 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2843 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2844 id_priv->id.port_num = p;
2845 cma_attach_to_dev(id_priv, cma_dev);
2846 cma_set_loopback(cma_src_addr(id_priv));
2848 mutex_unlock(&lock);
2852 static void addr_handler(int status, struct sockaddr *src_addr,
2853 struct rdma_dev_addr *dev_addr, void *context)
2855 struct rdma_id_private *id_priv = context;
2856 struct rdma_cm_event event = {};
2858 mutex_lock(&id_priv->handler_mutex);
2859 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2860 RDMA_CM_ADDR_RESOLVED))
2863 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2864 if (!status && !id_priv->cma_dev) {
2865 status = cma_acquire_dev(id_priv, NULL);
2867 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
2870 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
2874 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2875 RDMA_CM_ADDR_BOUND))
2877 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2878 event.status = status;
2880 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2882 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2883 cma_exch(id_priv, RDMA_CM_DESTROYING);
2884 mutex_unlock(&id_priv->handler_mutex);
2885 cma_deref_id(id_priv);
2886 rdma_destroy_id(&id_priv->id);
2890 mutex_unlock(&id_priv->handler_mutex);
2891 cma_deref_id(id_priv);
2894 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2896 struct cma_work *work;
2900 work = kzalloc(sizeof *work, GFP_KERNEL);
2904 if (!id_priv->cma_dev) {
2905 ret = cma_bind_loopback(id_priv);
2910 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2911 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2913 cma_init_resolve_addr_work(work, id_priv);
2914 queue_work(cma_wq, &work->work);
2921 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2923 struct cma_work *work;
2926 work = kzalloc(sizeof *work, GFP_KERNEL);
2930 if (!id_priv->cma_dev) {
2931 ret = cma_resolve_ib_dev(id_priv);
2936 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2937 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2939 cma_init_resolve_addr_work(work, id_priv);
2940 queue_work(cma_wq, &work->work);
2947 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2948 const struct sockaddr *dst_addr)
2950 if (!src_addr || !src_addr->sa_family) {
2951 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2952 src_addr->sa_family = dst_addr->sa_family;
2953 if (IS_ENABLED(CONFIG_IPV6) &&
2954 dst_addr->sa_family == AF_INET6) {
2955 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2956 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2957 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2958 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2959 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2960 } else if (dst_addr->sa_family == AF_IB) {
2961 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2962 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2965 return rdma_bind_addr(id, src_addr);
2968 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2969 const struct sockaddr *dst_addr, int timeout_ms)
2971 struct rdma_id_private *id_priv;
2974 id_priv = container_of(id, struct rdma_id_private, id);
2975 if (id_priv->state == RDMA_CM_IDLE) {
2976 ret = cma_bind_addr(id, src_addr, dst_addr);
2981 if (cma_family(id_priv) != dst_addr->sa_family)
2984 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2987 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2988 atomic_inc(&id_priv->refcount);
2989 if (cma_any_addr(dst_addr)) {
2990 ret = cma_resolve_loopback(id_priv);
2992 if (dst_addr->sa_family == AF_IB) {
2993 ret = cma_resolve_ib_addr(id_priv);
2995 ret = rdma_resolve_ip(cma_src_addr(id_priv),
2996 dst_addr, &id->route.addr.dev_addr,
2997 timeout_ms, addr_handler, id_priv);
3005 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
3006 cma_deref_id(id_priv);
3009 EXPORT_SYMBOL(rdma_resolve_addr);
3011 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
3013 struct rdma_id_private *id_priv;
3014 unsigned long flags;
3017 id_priv = container_of(id, struct rdma_id_private, id);
3018 spin_lock_irqsave(&id_priv->lock, flags);
3019 if (reuse || id_priv->state == RDMA_CM_IDLE) {
3020 id_priv->reuseaddr = reuse;
3025 spin_unlock_irqrestore(&id_priv->lock, flags);
3028 EXPORT_SYMBOL(rdma_set_reuseaddr);
3030 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3032 struct rdma_id_private *id_priv;
3033 unsigned long flags;
3036 id_priv = container_of(id, struct rdma_id_private, id);
3037 spin_lock_irqsave(&id_priv->lock, flags);
3038 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3039 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3040 id_priv->afonly = afonly;
3045 spin_unlock_irqrestore(&id_priv->lock, flags);
3048 EXPORT_SYMBOL(rdma_set_afonly);
3050 static void cma_bind_port(struct rdma_bind_list *bind_list,
3051 struct rdma_id_private *id_priv)
3053 struct sockaddr *addr;
3054 struct sockaddr_ib *sib;
3058 addr = cma_src_addr(id_priv);
3059 port = htons(bind_list->port);
3061 switch (addr->sa_family) {
3063 ((struct sockaddr_in *) addr)->sin_port = port;
3066 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3069 sib = (struct sockaddr_ib *) addr;
3070 sid = be64_to_cpu(sib->sib_sid);
3071 mask = be64_to_cpu(sib->sib_sid_mask);
3072 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3073 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3076 id_priv->bind_list = bind_list;
3077 hlist_add_head(&id_priv->node, &bind_list->owners);
3080 static int cma_alloc_port(enum rdma_ucm_port_space ps,
3081 struct rdma_id_private *id_priv, unsigned short snum)
3083 struct rdma_bind_list *bind_list;
3086 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
3090 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3096 bind_list->port = (unsigned short)ret;
3097 cma_bind_port(bind_list, id_priv);
3101 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
3104 static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3105 struct rdma_id_private *id_priv)
3107 struct rdma_id_private *cur_id;
3108 struct sockaddr *daddr = cma_dst_addr(id_priv);
3109 struct sockaddr *saddr = cma_src_addr(id_priv);
3110 __be16 dport = cma_port(daddr);
3112 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3113 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3114 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3115 __be16 cur_dport = cma_port(cur_daddr);
3117 if (id_priv == cur_id)
3120 /* different dest port -> unique */
3121 if (!cma_any_port(daddr) &&
3122 !cma_any_port(cur_daddr) &&
3123 (dport != cur_dport))
3126 /* different src address -> unique */
3127 if (!cma_any_addr(saddr) &&
3128 !cma_any_addr(cur_saddr) &&
3129 cma_addr_cmp(saddr, cur_saddr))
3132 /* different dst address -> unique */
3133 if (!cma_any_addr(daddr) &&
3134 !cma_any_addr(cur_daddr) &&
3135 cma_addr_cmp(daddr, cur_daddr))
3138 return -EADDRNOTAVAIL;
3143 static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
3144 struct rdma_id_private *id_priv)
3146 static unsigned int last_used_port;
3147 int low, high, remaining;
3149 struct net *net = id_priv->id.route.addr.dev_addr.net;
3151 inet_get_local_port_range(net, &low, &high);
3152 remaining = (high - low) + 1;
3153 rover = prandom_u32() % remaining + low;
3155 if (last_used_port != rover) {
3156 struct rdma_bind_list *bind_list;
3159 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3162 ret = cma_alloc_port(ps, id_priv, rover);
3164 ret = cma_port_is_unique(bind_list, id_priv);
3166 cma_bind_port(bind_list, id_priv);
3169 * Remember previously used port number in order to avoid
3170 * re-using same port immediately after it is closed.
3173 last_used_port = rover;
3174 if (ret != -EADDRNOTAVAIL)
3179 if ((rover < low) || (rover > high))
3183 return -EADDRNOTAVAIL;
3187 * Check that the requested port is available. This is called when trying to
3188 * bind to a specific port, or when trying to listen on a bound port. In
3189 * the latter case, the provided id_priv may already be on the bind_list, but
3190 * we still need to check that it's okay to start listening.
3192 static int cma_check_port(struct rdma_bind_list *bind_list,
3193 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3195 struct rdma_id_private *cur_id;
3196 struct sockaddr *addr, *cur_addr;
3198 addr = cma_src_addr(id_priv);
3199 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3200 if (id_priv == cur_id)
3203 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3207 cur_addr = cma_src_addr(cur_id);
3208 if (id_priv->afonly && cur_id->afonly &&
3209 (addr->sa_family != cur_addr->sa_family))
3212 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3213 return -EADDRNOTAVAIL;
3215 if (!cma_addr_cmp(addr, cur_addr))
3221 static int cma_use_port(enum rdma_ucm_port_space ps,
3222 struct rdma_id_private *id_priv)
3224 struct rdma_bind_list *bind_list;
3225 unsigned short snum;
3228 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3229 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3232 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3234 ret = cma_alloc_port(ps, id_priv, snum);
3236 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3238 cma_bind_port(bind_list, id_priv);
3243 static int cma_bind_listen(struct rdma_id_private *id_priv)
3245 struct rdma_bind_list *bind_list = id_priv->bind_list;
3249 if (bind_list->owners.first->next)
3250 ret = cma_check_port(bind_list, id_priv, 0);
3251 mutex_unlock(&lock);
3255 static enum rdma_ucm_port_space
3256 cma_select_inet_ps(struct rdma_id_private *id_priv)
3258 switch (id_priv->id.ps) {
3263 return id_priv->id.ps;
3270 static enum rdma_ucm_port_space
3271 cma_select_ib_ps(struct rdma_id_private *id_priv)
3273 enum rdma_ucm_port_space ps = 0;
3274 struct sockaddr_ib *sib;
3275 u64 sid_ps, mask, sid;
3277 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3278 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3279 sid = be64_to_cpu(sib->sib_sid) & mask;
3281 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3282 sid_ps = RDMA_IB_IP_PS_IB;
3284 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3285 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3286 sid_ps = RDMA_IB_IP_PS_TCP;
3288 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3289 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3290 sid_ps = RDMA_IB_IP_PS_UDP;
3295 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3296 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3297 be64_to_cpu(sib->sib_sid_mask));
3302 static int cma_get_port(struct rdma_id_private *id_priv)
3304 enum rdma_ucm_port_space ps;
3307 if (cma_family(id_priv) != AF_IB)
3308 ps = cma_select_inet_ps(id_priv);
3310 ps = cma_select_ib_ps(id_priv);
3312 return -EPROTONOSUPPORT;
3315 if (cma_any_port(cma_src_addr(id_priv)))
3316 ret = cma_alloc_any_port(ps, id_priv);
3318 ret = cma_use_port(ps, id_priv);
3319 mutex_unlock(&lock);
3324 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3325 struct sockaddr *addr)
3327 #if IS_ENABLED(CONFIG_IPV6)
3328 struct sockaddr_in6 *sin6;
3330 if (addr->sa_family != AF_INET6)
3333 sin6 = (struct sockaddr_in6 *) addr;
3335 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3338 if (!sin6->sin6_scope_id)
3341 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3346 int rdma_listen(struct rdma_cm_id *id, int backlog)
3348 struct rdma_id_private *id_priv;
3351 id_priv = container_of(id, struct rdma_id_private, id);
3352 if (id_priv->state == RDMA_CM_IDLE) {
3353 id->route.addr.src_addr.ss_family = AF_INET;
3354 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3359 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3362 if (id_priv->reuseaddr) {
3363 ret = cma_bind_listen(id_priv);
3368 id_priv->backlog = backlog;
3370 if (rdma_cap_ib_cm(id->device, 1)) {
3371 ret = cma_ib_listen(id_priv);
3374 } else if (rdma_cap_iw_cm(id->device, 1)) {
3375 ret = cma_iw_listen(id_priv, backlog);
3383 cma_listen_on_all(id_priv);
3387 id_priv->backlog = 0;
3388 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3391 EXPORT_SYMBOL(rdma_listen);
3393 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3395 struct rdma_id_private *id_priv;
3397 struct sockaddr *daddr;
3399 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3400 addr->sa_family != AF_IB)
3401 return -EAFNOSUPPORT;
3403 id_priv = container_of(id, struct rdma_id_private, id);
3404 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3407 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3411 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3412 if (!cma_any_addr(addr)) {
3413 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3417 ret = cma_acquire_dev(id_priv, NULL);
3422 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3423 if (addr->sa_family == AF_INET)
3424 id_priv->afonly = 1;
3425 #if IS_ENABLED(CONFIG_IPV6)
3426 else if (addr->sa_family == AF_INET6) {
3427 struct net *net = id_priv->id.route.addr.dev_addr.net;
3429 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3433 daddr = cma_dst_addr(id_priv);
3434 daddr->sa_family = addr->sa_family;
3436 ret = cma_get_port(id_priv);
3442 if (id_priv->cma_dev) {
3443 rdma_restrack_del(&id_priv->res);
3444 cma_release_dev(id_priv);
3447 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3450 EXPORT_SYMBOL(rdma_bind_addr);
3452 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3454 struct cma_hdr *cma_hdr;
3457 cma_hdr->cma_version = CMA_VERSION;
3458 if (cma_family(id_priv) == AF_INET) {
3459 struct sockaddr_in *src4, *dst4;
3461 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3462 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3464 cma_set_ip_ver(cma_hdr, 4);
3465 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3466 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3467 cma_hdr->port = src4->sin_port;
3468 } else if (cma_family(id_priv) == AF_INET6) {
3469 struct sockaddr_in6 *src6, *dst6;
3471 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3472 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3474 cma_set_ip_ver(cma_hdr, 6);
3475 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3476 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3477 cma_hdr->port = src6->sin6_port;
3482 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3483 const struct ib_cm_event *ib_event)
3485 struct rdma_id_private *id_priv = cm_id->context;
3486 struct rdma_cm_event event = {};
3487 const struct ib_cm_sidr_rep_event_param *rep =
3488 &ib_event->param.sidr_rep_rcvd;
3491 mutex_lock(&id_priv->handler_mutex);
3492 if (id_priv->state != RDMA_CM_CONNECT)
3495 switch (ib_event->event) {
3496 case IB_CM_SIDR_REQ_ERROR:
3497 event.event = RDMA_CM_EVENT_UNREACHABLE;
3498 event.status = -ETIMEDOUT;
3500 case IB_CM_SIDR_REP_RECEIVED:
3501 event.param.ud.private_data = ib_event->private_data;
3502 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3503 if (rep->status != IB_SIDR_SUCCESS) {
3504 event.event = RDMA_CM_EVENT_UNREACHABLE;
3505 event.status = ib_event->param.sidr_rep_rcvd.status;
3506 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3510 ret = cma_set_qkey(id_priv, rep->qkey);
3512 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3513 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3517 ib_init_ah_attr_from_path(id_priv->id.device,
3518 id_priv->id.port_num,
3519 id_priv->id.route.path_rec,
3520 &event.param.ud.ah_attr,
3522 event.param.ud.qp_num = rep->qpn;
3523 event.param.ud.qkey = rep->qkey;
3524 event.event = RDMA_CM_EVENT_ESTABLISHED;
3528 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3533 ret = id_priv->id.event_handler(&id_priv->id, &event);
3535 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
3537 /* Destroy the CM ID by returning a non-zero value. */
3538 id_priv->cm_id.ib = NULL;
3539 cma_exch(id_priv, RDMA_CM_DESTROYING);
3540 mutex_unlock(&id_priv->handler_mutex);
3541 rdma_destroy_id(&id_priv->id);
3545 mutex_unlock(&id_priv->handler_mutex);
3549 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3550 struct rdma_conn_param *conn_param)
3552 struct ib_cm_sidr_req_param req;
3553 struct ib_cm_id *id;
3558 memset(&req, 0, sizeof req);
3559 offset = cma_user_data_offset(id_priv);
3560 req.private_data_len = offset + conn_param->private_data_len;
3561 if (req.private_data_len < conn_param->private_data_len)
3564 if (req.private_data_len) {
3565 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3569 private_data = NULL;
3572 if (conn_param->private_data && conn_param->private_data_len)
3573 memcpy(private_data + offset, conn_param->private_data,
3574 conn_param->private_data_len);
3577 ret = cma_format_hdr(private_data, id_priv);
3580 req.private_data = private_data;
3583 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3589 id_priv->cm_id.ib = id;
3591 req.path = id_priv->id.route.path_rec;
3592 req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3593 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3594 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3595 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3597 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3599 ib_destroy_cm_id(id_priv->cm_id.ib);
3600 id_priv->cm_id.ib = NULL;
3603 kfree(private_data);
3607 static int cma_connect_ib(struct rdma_id_private *id_priv,
3608 struct rdma_conn_param *conn_param)
3610 struct ib_cm_req_param req;
3611 struct rdma_route *route;
3613 struct ib_cm_id *id;
3617 memset(&req, 0, sizeof req);
3618 offset = cma_user_data_offset(id_priv);
3619 req.private_data_len = offset + conn_param->private_data_len;
3620 if (req.private_data_len < conn_param->private_data_len)
3623 if (req.private_data_len) {
3624 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3628 private_data = NULL;
3631 if (conn_param->private_data && conn_param->private_data_len)
3632 memcpy(private_data + offset, conn_param->private_data,
3633 conn_param->private_data_len);
3635 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3640 id_priv->cm_id.ib = id;
3642 route = &id_priv->id.route;
3644 ret = cma_format_hdr(private_data, id_priv);
3647 req.private_data = private_data;
3650 req.primary_path = &route->path_rec[0];
3651 if (route->num_paths == 2)
3652 req.alternate_path = &route->path_rec[1];
3654 req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3655 /* Alternate path SGID attribute currently unsupported */
3656 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3657 req.qp_num = id_priv->qp_num;
3658 req.qp_type = id_priv->id.qp_type;
3659 req.starting_psn = id_priv->seq_num;
3660 req.responder_resources = conn_param->responder_resources;
3661 req.initiator_depth = conn_param->initiator_depth;
3662 req.flow_control = conn_param->flow_control;
3663 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3664 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3665 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3666 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3667 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3668 req.srq = id_priv->srq ? 1 : 0;
3670 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3672 if (ret && !IS_ERR(id)) {
3673 ib_destroy_cm_id(id);
3674 id_priv->cm_id.ib = NULL;
3677 kfree(private_data);
3681 static int cma_connect_iw(struct rdma_id_private *id_priv,
3682 struct rdma_conn_param *conn_param)
3684 struct iw_cm_id *cm_id;
3686 struct iw_cm_conn_param iw_param;
3688 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3690 return PTR_ERR(cm_id);
3692 cm_id->tos = id_priv->tos;
3693 id_priv->cm_id.iw = cm_id;
3695 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3696 rdma_addr_size(cma_src_addr(id_priv)));
3697 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3698 rdma_addr_size(cma_dst_addr(id_priv)));
3700 ret = cma_modify_qp_rtr(id_priv, conn_param);
3705 iw_param.ord = conn_param->initiator_depth;
3706 iw_param.ird = conn_param->responder_resources;
3707 iw_param.private_data = conn_param->private_data;
3708 iw_param.private_data_len = conn_param->private_data_len;
3709 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3711 memset(&iw_param, 0, sizeof iw_param);
3712 iw_param.qpn = id_priv->qp_num;
3714 ret = iw_cm_connect(cm_id, &iw_param);
3717 iw_destroy_cm_id(cm_id);
3718 id_priv->cm_id.iw = NULL;
3723 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3725 struct rdma_id_private *id_priv;
3728 id_priv = container_of(id, struct rdma_id_private, id);
3729 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3733 id_priv->qp_num = conn_param->qp_num;
3734 id_priv->srq = conn_param->srq;
3737 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3738 if (id->qp_type == IB_QPT_UD)
3739 ret = cma_resolve_ib_udp(id_priv, conn_param);
3741 ret = cma_connect_ib(id_priv, conn_param);
3742 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3743 ret = cma_connect_iw(id_priv, conn_param);
3751 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3754 EXPORT_SYMBOL(rdma_connect);
3756 static int cma_accept_ib(struct rdma_id_private *id_priv,
3757 struct rdma_conn_param *conn_param)
3759 struct ib_cm_rep_param rep;
3762 ret = cma_modify_qp_rtr(id_priv, conn_param);
3766 ret = cma_modify_qp_rts(id_priv, conn_param);
3770 memset(&rep, 0, sizeof rep);
3771 rep.qp_num = id_priv->qp_num;
3772 rep.starting_psn = id_priv->seq_num;
3773 rep.private_data = conn_param->private_data;
3774 rep.private_data_len = conn_param->private_data_len;
3775 rep.responder_resources = conn_param->responder_resources;
3776 rep.initiator_depth = conn_param->initiator_depth;
3777 rep.failover_accepted = 0;
3778 rep.flow_control = conn_param->flow_control;
3779 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3780 rep.srq = id_priv->srq ? 1 : 0;
3782 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3787 static int cma_accept_iw(struct rdma_id_private *id_priv,
3788 struct rdma_conn_param *conn_param)
3790 struct iw_cm_conn_param iw_param;
3796 ret = cma_modify_qp_rtr(id_priv, conn_param);
3800 iw_param.ord = conn_param->initiator_depth;
3801 iw_param.ird = conn_param->responder_resources;
3802 iw_param.private_data = conn_param->private_data;
3803 iw_param.private_data_len = conn_param->private_data_len;
3804 if (id_priv->id.qp) {
3805 iw_param.qpn = id_priv->qp_num;
3807 iw_param.qpn = conn_param->qp_num;
3809 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3812 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3813 enum ib_cm_sidr_status status, u32 qkey,
3814 const void *private_data, int private_data_len)
3816 struct ib_cm_sidr_rep_param rep;
3819 memset(&rep, 0, sizeof rep);
3820 rep.status = status;
3821 if (status == IB_SIDR_SUCCESS) {
3822 ret = cma_set_qkey(id_priv, qkey);
3825 rep.qp_num = id_priv->qp_num;
3826 rep.qkey = id_priv->qkey;
3828 rep.private_data = private_data;
3829 rep.private_data_len = private_data_len;
3831 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3834 int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
3837 struct rdma_id_private *id_priv;
3840 id_priv = container_of(id, struct rdma_id_private, id);
3843 id_priv->res.kern_name = caller;
3845 rdma_restrack_set_task(&id_priv->res, current);
3847 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3850 if (!id->qp && conn_param) {
3851 id_priv->qp_num = conn_param->qp_num;
3852 id_priv->srq = conn_param->srq;
3855 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3856 if (id->qp_type == IB_QPT_UD) {
3858 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3860 conn_param->private_data,
3861 conn_param->private_data_len);
3863 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3867 ret = cma_accept_ib(id_priv, conn_param);
3869 ret = cma_rep_recv(id_priv);
3871 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3872 ret = cma_accept_iw(id_priv, conn_param);
3881 cma_modify_qp_err(id_priv);
3882 rdma_reject(id, NULL, 0);
3885 EXPORT_SYMBOL(__rdma_accept);
3887 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3889 struct rdma_id_private *id_priv;
3892 id_priv = container_of(id, struct rdma_id_private, id);
3893 if (!id_priv->cm_id.ib)
3896 switch (id->device->node_type) {
3897 case RDMA_NODE_IB_CA:
3898 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3906 EXPORT_SYMBOL(rdma_notify);
3908 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3909 u8 private_data_len)
3911 struct rdma_id_private *id_priv;
3914 id_priv = container_of(id, struct rdma_id_private, id);
3915 if (!id_priv->cm_id.ib)
3918 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3919 if (id->qp_type == IB_QPT_UD)
3920 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3921 private_data, private_data_len);
3923 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3924 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3925 0, private_data, private_data_len);
3926 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3927 ret = iw_cm_reject(id_priv->cm_id.iw,
3928 private_data, private_data_len);
3934 EXPORT_SYMBOL(rdma_reject);
3936 int rdma_disconnect(struct rdma_cm_id *id)
3938 struct rdma_id_private *id_priv;
3941 id_priv = container_of(id, struct rdma_id_private, id);
3942 if (!id_priv->cm_id.ib)
3945 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3946 ret = cma_modify_qp_err(id_priv);
3949 /* Initiate or respond to a disconnect. */
3950 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3951 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3952 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3953 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3960 EXPORT_SYMBOL(rdma_disconnect);
3962 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3964 struct rdma_id_private *id_priv;
3965 struct cma_multicast *mc = multicast->context;
3966 struct rdma_cm_event event = {};
3969 id_priv = mc->id_priv;
3970 mutex_lock(&id_priv->handler_mutex);
3971 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3972 id_priv->state != RDMA_CM_ADDR_RESOLVED)
3976 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3978 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
3980 mutex_lock(&id_priv->qp_mutex);
3981 if (!status && id_priv->id.qp) {
3982 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3983 be16_to_cpu(multicast->rec.mlid));
3985 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
3988 mutex_unlock(&id_priv->qp_mutex);
3990 event.status = status;
3991 event.param.ud.private_data = mc->context;
3993 struct rdma_dev_addr *dev_addr =
3994 &id_priv->id.route.addr.dev_addr;
3995 struct net_device *ndev =
3996 dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
3997 enum ib_gid_type gid_type =
3998 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3999 rdma_start_port(id_priv->cma_dev->device)];
4001 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
4002 ret = ib_init_ah_from_mcmember(id_priv->id.device,
4003 id_priv->id.port_num,
4006 &event.param.ud.ah_attr);
4008 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4010 event.param.ud.qp_num = 0xFFFFFF;
4011 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
4015 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4017 ret = id_priv->id.event_handler(&id_priv->id, &event);
4019 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
4021 cma_exch(id_priv, RDMA_CM_DESTROYING);
4022 mutex_unlock(&id_priv->handler_mutex);
4023 rdma_destroy_id(&id_priv->id);
4028 mutex_unlock(&id_priv->handler_mutex);
4032 static void cma_set_mgid(struct rdma_id_private *id_priv,
4033 struct sockaddr *addr, union ib_gid *mgid)
4035 unsigned char mc_map[MAX_ADDR_LEN];
4036 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4037 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4038 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4040 if (cma_any_addr(addr)) {
4041 memset(mgid, 0, sizeof *mgid);
4042 } else if ((addr->sa_family == AF_INET6) &&
4043 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
4045 /* IPv6 address is an SA assigned MGID. */
4046 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4047 } else if (addr->sa_family == AF_IB) {
4048 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
4049 } else if (addr->sa_family == AF_INET6) {
4050 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4051 if (id_priv->id.ps == RDMA_PS_UDP)
4052 mc_map[7] = 0x01; /* Use RDMA CM signature */
4053 *mgid = *(union ib_gid *) (mc_map + 4);
4055 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
4056 if (id_priv->id.ps == RDMA_PS_UDP)
4057 mc_map[7] = 0x01; /* Use RDMA CM signature */
4058 *mgid = *(union ib_gid *) (mc_map + 4);
4062 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4063 struct cma_multicast *mc)
4065 struct ib_sa_mcmember_rec rec;
4066 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4067 ib_sa_comp_mask comp_mask;
4070 ib_addr_get_mgid(dev_addr, &rec.mgid);
4071 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4076 ret = cma_set_qkey(id_priv, 0);
4080 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
4081 rec.qkey = cpu_to_be32(id_priv->qkey);
4082 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
4083 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
4084 rec.join_state = mc->join_state;
4086 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
4087 (!ib_sa_sendonly_fullmem_support(&sa_client,
4089 id_priv->id.port_num))) {
4090 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
4091 "RDMA CM: SM doesn't support Send Only Full Member option\n",
4092 id_priv->id.device->name, id_priv->id.port_num);
4096 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4097 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4098 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4099 IB_SA_MCMEMBER_REC_FLOW_LABEL |
4100 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4102 if (id_priv->id.ps == RDMA_PS_IPOIB)
4103 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
4104 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4105 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4106 IB_SA_MCMEMBER_REC_MTU |
4107 IB_SA_MCMEMBER_REC_HOP_LIMIT;
4109 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4110 id_priv->id.port_num, &rec,
4111 comp_mask, GFP_KERNEL,
4112 cma_ib_mc_handler, mc);
4113 return PTR_ERR_OR_ZERO(mc->multicast.ib);
4116 static void iboe_mcast_work_handler(struct work_struct *work)
4118 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4119 struct cma_multicast *mc = mw->mc;
4120 struct ib_sa_multicast *m = mc->multicast.ib;
4122 mc->multicast.ib->context = mc;
4123 cma_ib_mc_handler(0, m);
4124 kref_put(&mc->mcref, release_mc);
4128 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4129 enum ib_gid_type gid_type)
4131 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4132 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4134 if (cma_any_addr(addr)) {
4135 memset(mgid, 0, sizeof *mgid);
4136 } else if (addr->sa_family == AF_INET6) {
4137 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4140 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4142 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
4151 mgid->raw[10] = 0xff;
4152 mgid->raw[11] = 0xff;
4153 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4157 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4158 struct cma_multicast *mc)
4160 struct iboe_mcast_work *work;
4161 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4163 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4164 struct net_device *ndev = NULL;
4165 enum ib_gid_type gid_type;
4168 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4170 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4173 work = kzalloc(sizeof *work, GFP_KERNEL);
4177 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4178 if (!mc->multicast.ib) {
4183 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4184 rdma_start_port(id_priv->cma_dev->device)];
4185 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
4187 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4188 if (id_priv->id.ps == RDMA_PS_UDP)
4189 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4191 if (dev_addr->bound_dev_if)
4192 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4197 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4198 mc->multicast.ib->rec.hop_limit = 1;
4199 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4201 if (addr->sa_family == AF_INET) {
4202 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4203 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4205 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4210 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4214 if (err || !mc->multicast.ib->rec.mtu) {
4219 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4220 &mc->multicast.ib->rec.port_gid);
4223 INIT_WORK(&work->work, iboe_mcast_work_handler);
4224 kref_get(&mc->mcref);
4225 queue_work(cma_wq, &work->work);
4230 kfree(mc->multicast.ib);
4236 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4237 u8 join_state, void *context)
4239 struct rdma_id_private *id_priv;
4240 struct cma_multicast *mc;
4246 id_priv = container_of(id, struct rdma_id_private, id);
4247 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4248 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4251 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4255 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4256 mc->context = context;
4257 mc->id_priv = id_priv;
4258 mc->join_state = join_state;
4260 if (rdma_protocol_roce(id->device, id->port_num)) {
4261 kref_init(&mc->mcref);
4262 ret = cma_iboe_join_multicast(id_priv, mc);
4265 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4266 ret = cma_join_ib_multicast(id_priv, mc);
4274 spin_lock(&id_priv->lock);
4275 list_add(&mc->list, &id_priv->mc_list);
4276 spin_unlock(&id_priv->lock);
4283 EXPORT_SYMBOL(rdma_join_multicast);
4285 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4287 struct rdma_id_private *id_priv;
4288 struct cma_multicast *mc;
4290 id_priv = container_of(id, struct rdma_id_private, id);
4291 spin_lock_irq(&id_priv->lock);
4292 list_for_each_entry(mc, &id_priv->mc_list, list) {
4293 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4294 list_del(&mc->list);
4295 spin_unlock_irq(&id_priv->lock);
4298 ib_detach_mcast(id->qp,
4299 &mc->multicast.ib->rec.mgid,
4300 be16_to_cpu(mc->multicast.ib->rec.mlid));
4302 BUG_ON(id_priv->cma_dev->device != id->device);
4304 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4305 ib_sa_free_multicast(mc->multicast.ib);
4307 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4308 cma_leave_roce_mc_group(id_priv, mc);
4313 spin_unlock_irq(&id_priv->lock);
4315 EXPORT_SYMBOL(rdma_leave_multicast);
4317 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4319 struct rdma_dev_addr *dev_addr;
4320 struct cma_ndev_work *work;
4322 dev_addr = &id_priv->id.route.addr.dev_addr;
4324 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4325 (net_eq(dev_net(ndev), dev_addr->net)) &&
4326 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4327 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4328 ndev->name, &id_priv->id);
4329 work = kzalloc(sizeof *work, GFP_KERNEL);
4333 INIT_WORK(&work->work, cma_ndev_work_handler);
4335 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4336 atomic_inc(&id_priv->refcount);
4337 queue_work(cma_wq, &work->work);
4343 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4346 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4347 struct cma_device *cma_dev;
4348 struct rdma_id_private *id_priv;
4349 int ret = NOTIFY_DONE;
4351 if (event != NETDEV_BONDING_FAILOVER)
4354 if (!netif_is_bond_master(ndev))
4358 list_for_each_entry(cma_dev, &dev_list, list)
4359 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4360 ret = cma_netdev_change(ndev, id_priv);
4366 mutex_unlock(&lock);
4370 static struct notifier_block cma_nb = {
4371 .notifier_call = cma_netdev_callback
4374 static void cma_add_one(struct ib_device *device)
4376 struct cma_device *cma_dev;
4377 struct rdma_id_private *id_priv;
4379 unsigned long supported_gids = 0;
4381 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4385 cma_dev->device = device;
4386 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4387 sizeof(*cma_dev->default_gid_type),
4389 if (!cma_dev->default_gid_type)
4392 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4393 sizeof(*cma_dev->default_roce_tos),
4395 if (!cma_dev->default_roce_tos)
4398 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4399 supported_gids = roce_gid_type_mask_support(device, i);
4400 WARN_ON(!supported_gids);
4401 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
4402 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4403 CMA_PREFERRED_ROCE_GID_TYPE;
4405 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4406 find_first_bit(&supported_gids, BITS_PER_LONG);
4407 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4410 init_completion(&cma_dev->comp);
4411 atomic_set(&cma_dev->refcount, 1);
4412 INIT_LIST_HEAD(&cma_dev->id_list);
4413 ib_set_client_data(device, &cma_client, cma_dev);
4416 list_add_tail(&cma_dev->list, &dev_list);
4417 list_for_each_entry(id_priv, &listen_any_list, list)
4418 cma_listen_on_dev(id_priv, cma_dev);
4419 mutex_unlock(&lock);
4424 kfree(cma_dev->default_gid_type);
4432 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4434 struct rdma_cm_event event = {};
4435 enum rdma_cm_state state;
4438 /* Record that we want to remove the device */
4439 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4440 if (state == RDMA_CM_DESTROYING)
4443 cma_cancel_operation(id_priv, state);
4444 mutex_lock(&id_priv->handler_mutex);
4446 /* Check for destruction from another callback. */
4447 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4450 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4451 ret = id_priv->id.event_handler(&id_priv->id, &event);
4453 mutex_unlock(&id_priv->handler_mutex);
4457 static void cma_process_remove(struct cma_device *cma_dev)
4459 struct rdma_id_private *id_priv;
4463 while (!list_empty(&cma_dev->id_list)) {
4464 id_priv = list_entry(cma_dev->id_list.next,
4465 struct rdma_id_private, list);
4467 list_del(&id_priv->listen_list);
4468 list_del_init(&id_priv->list);
4469 atomic_inc(&id_priv->refcount);
4470 mutex_unlock(&lock);
4472 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4473 cma_deref_id(id_priv);
4475 rdma_destroy_id(&id_priv->id);
4479 mutex_unlock(&lock);
4481 cma_deref_dev(cma_dev);
4482 wait_for_completion(&cma_dev->comp);
4485 static void cma_remove_one(struct ib_device *device, void *client_data)
4487 struct cma_device *cma_dev = client_data;
4493 list_del(&cma_dev->list);
4494 mutex_unlock(&lock);
4496 cma_process_remove(cma_dev);
4497 kfree(cma_dev->default_roce_tos);
4498 kfree(cma_dev->default_gid_type);
4502 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4504 struct nlmsghdr *nlh;
4505 struct rdma_cm_id_stats *id_stats;
4506 struct rdma_id_private *id_priv;
4507 struct rdma_cm_id *id = NULL;
4508 struct cma_device *cma_dev;
4509 int i_dev = 0, i_id = 0;
4512 * We export all of the IDs as a sequence of messages. Each
4513 * ID gets its own netlink message.
4517 list_for_each_entry(cma_dev, &dev_list, list) {
4518 if (i_dev < cb->args[0]) {
4524 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4525 if (i_id < cb->args[1]) {
4530 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4531 sizeof *id_stats, RDMA_NL_RDMA_CM,
4532 RDMA_NL_RDMA_CM_ID_STATS,
4537 memset(id_stats, 0, sizeof *id_stats);
4539 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4540 id_stats->port_num = id->port_num;
4541 id_stats->bound_dev_if =
4542 id->route.addr.dev_addr.bound_dev_if;
4544 if (ibnl_put_attr(skb, nlh,
4545 rdma_addr_size(cma_src_addr(id_priv)),
4546 cma_src_addr(id_priv),
4547 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4549 if (ibnl_put_attr(skb, nlh,
4550 rdma_addr_size(cma_dst_addr(id_priv)),
4551 cma_dst_addr(id_priv),
4552 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4555 id_stats->pid = task_pid_vnr(id_priv->res.task);
4556 id_stats->port_space = id->ps;
4557 id_stats->cm_state = id_priv->state;
4558 id_stats->qp_num = id_priv->qp_num;
4559 id_stats->qp_type = id->qp_type;
4562 nlmsg_end(skb, nlh);
4570 mutex_unlock(&lock);
4571 cb->args[0] = i_dev;
4577 static const struct rdma_nl_cbs cma_cb_table[RDMA_NL_RDMA_CM_NUM_OPS] = {
4578 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats},
4581 static int cma_init_net(struct net *net)
4583 struct cma_pernet *pernet = cma_pernet(net);
4585 idr_init(&pernet->tcp_ps);
4586 idr_init(&pernet->udp_ps);
4587 idr_init(&pernet->ipoib_ps);
4588 idr_init(&pernet->ib_ps);
4593 static void cma_exit_net(struct net *net)
4595 struct cma_pernet *pernet = cma_pernet(net);
4597 idr_destroy(&pernet->tcp_ps);
4598 idr_destroy(&pernet->udp_ps);
4599 idr_destroy(&pernet->ipoib_ps);
4600 idr_destroy(&pernet->ib_ps);
4603 static struct pernet_operations cma_pernet_operations = {
4604 .init = cma_init_net,
4605 .exit = cma_exit_net,
4606 .id = &cma_pernet_id,
4607 .size = sizeof(struct cma_pernet),
4610 static int __init cma_init(void)
4614 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4618 ret = register_pernet_subsys(&cma_pernet_operations);
4622 ib_sa_register_client(&sa_client);
4623 register_netdevice_notifier(&cma_nb);
4625 ret = ib_register_client(&cma_client);
4629 rdma_nl_register(RDMA_NL_RDMA_CM, cma_cb_table);
4630 cma_configfs_init();
4635 unregister_netdevice_notifier(&cma_nb);
4636 ib_sa_unregister_client(&sa_client);
4638 destroy_workqueue(cma_wq);
4642 static void __exit cma_cleanup(void)
4644 cma_configfs_exit();
4645 rdma_nl_unregister(RDMA_NL_RDMA_CM);
4646 ib_unregister_client(&cma_client);
4647 unregister_netdevice_notifier(&cma_nb);
4648 ib_sa_unregister_client(&sa_client);
4649 unregister_pernet_subsys(&cma_pernet_operations);
4650 destroy_workqueue(cma_wq);
4653 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_RDMA_CM, 1);
4655 module_init(cma_init);
4656 module_exit(cma_cleanup);