2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/completion.h>
38 #include <linux/in6.h>
39 #include <linux/mutex.h>
40 #include <linux/random.h>
41 #include <linux/igmp.h>
42 #include <linux/idr.h>
43 #include <linux/inetdevice.h>
44 #include <linux/slab.h>
45 #include <linux/module.h>
46 #include <net/route.h>
48 #include <net/net_namespace.h>
49 #include <net/netns/generic.h>
52 #include <net/ip_fib.h>
53 #include <net/ip6_route.h>
55 #include <rdma/rdma_cm.h>
56 #include <rdma/rdma_cm_ib.h>
57 #include <rdma/rdma_netlink.h>
59 #include <rdma/ib_cache.h>
60 #include <rdma/ib_cm.h>
61 #include <rdma/ib_sa.h>
62 #include <rdma/iw_cm.h>
64 #include "core_priv.h"
66 MODULE_AUTHOR("Sean Hefty");
67 MODULE_DESCRIPTION("Generic RDMA CM Agent");
68 MODULE_LICENSE("Dual BSD/GPL");
70 #define CMA_CM_RESPONSE_TIMEOUT 20
71 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
72 #define CMA_MAX_CM_RETRIES 15
73 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
74 #define CMA_IBOE_PACKET_LIFETIME 18
76 static const char * const cma_events[] = {
77 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
78 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
79 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
80 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
81 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
82 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
83 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
84 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
85 [RDMA_CM_EVENT_REJECTED] = "rejected",
86 [RDMA_CM_EVENT_ESTABLISHED] = "established",
87 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
88 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
89 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
90 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
91 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
92 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
95 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
99 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
100 cma_events[index] : "unrecognized event";
102 EXPORT_SYMBOL(rdma_event_msg);
104 const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
107 if (rdma_ib_or_roce(id->device, id->port_num))
108 return ibcm_reject_msg(reason);
110 if (rdma_protocol_iwarp(id->device, id->port_num))
111 return iwcm_reject_msg(reason);
114 return "unrecognized transport";
116 EXPORT_SYMBOL(rdma_reject_msg);
118 bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
120 if (rdma_ib_or_roce(id->device, id->port_num))
121 return reason == IB_CM_REJ_CONSUMER_DEFINED;
123 if (rdma_protocol_iwarp(id->device, id->port_num))
124 return reason == -ECONNREFUSED;
129 EXPORT_SYMBOL(rdma_is_consumer_reject);
131 const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
132 struct rdma_cm_event *ev, u8 *data_len)
136 if (rdma_is_consumer_reject(id, ev->status)) {
137 *data_len = ev->param.conn.private_data_len;
138 p = ev->param.conn.private_data;
145 EXPORT_SYMBOL(rdma_consumer_reject_data);
147 static void cma_add_one(struct ib_device *device);
148 static void cma_remove_one(struct ib_device *device, void *client_data);
150 static struct ib_client cma_client = {
153 .remove = cma_remove_one
156 static struct ib_sa_client sa_client;
157 static struct rdma_addr_client addr_client;
158 static LIST_HEAD(dev_list);
159 static LIST_HEAD(listen_any_list);
160 static DEFINE_MUTEX(lock);
161 static struct workqueue_struct *cma_wq;
162 static unsigned int cma_pernet_id;
171 static struct cma_pernet *cma_pernet(struct net *net)
173 return net_generic(net, cma_pernet_id);
176 static struct idr *cma_pernet_idr(struct net *net, enum rdma_port_space ps)
178 struct cma_pernet *pernet = cma_pernet(net);
182 return &pernet->tcp_ps;
184 return &pernet->udp_ps;
186 return &pernet->ipoib_ps;
188 return &pernet->ib_ps;
195 struct list_head list;
196 struct ib_device *device;
197 struct completion comp;
199 struct list_head id_list;
200 enum ib_gid_type *default_gid_type;
201 u8 *default_roce_tos;
204 struct rdma_bind_list {
205 enum rdma_port_space ps;
206 struct hlist_head owners;
210 struct class_port_info_context {
211 struct ib_class_port_info *class_port_info;
212 struct ib_device *device;
213 struct completion done;
214 struct ib_sa_query *sa_query;
218 static int cma_ps_alloc(struct net *net, enum rdma_port_space ps,
219 struct rdma_bind_list *bind_list, int snum)
221 struct idr *idr = cma_pernet_idr(net, ps);
223 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
226 static struct rdma_bind_list *cma_ps_find(struct net *net,
227 enum rdma_port_space ps, int snum)
229 struct idr *idr = cma_pernet_idr(net, ps);
231 return idr_find(idr, snum);
234 static void cma_ps_remove(struct net *net, enum rdma_port_space ps, int snum)
236 struct idr *idr = cma_pernet_idr(net, ps);
238 idr_remove(idr, snum);
245 void cma_ref_dev(struct cma_device *cma_dev)
247 atomic_inc(&cma_dev->refcount);
250 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
253 struct cma_device *cma_dev;
254 struct cma_device *found_cma_dev = NULL;
258 list_for_each_entry(cma_dev, &dev_list, list)
259 if (filter(cma_dev->device, cookie)) {
260 found_cma_dev = cma_dev;
265 cma_ref_dev(found_cma_dev);
267 return found_cma_dev;
270 int cma_get_default_gid_type(struct cma_device *cma_dev,
273 if (!rdma_is_port_valid(cma_dev->device, port))
276 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
279 int cma_set_default_gid_type(struct cma_device *cma_dev,
281 enum ib_gid_type default_gid_type)
283 unsigned long supported_gids;
285 if (!rdma_is_port_valid(cma_dev->device, port))
288 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
290 if (!(supported_gids & 1 << default_gid_type))
293 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
299 int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
301 if (!rdma_is_port_valid(cma_dev->device, port))
304 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
307 int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
310 if (!rdma_is_port_valid(cma_dev->device, port))
313 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
318 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
320 return cma_dev->device;
324 * Device removal can occur at anytime, so we need extra handling to
325 * serialize notifying the user of device removal with other callbacks.
326 * We do this by disabling removal notification while a callback is in process,
327 * and reporting it after the callback completes.
329 struct rdma_id_private {
330 struct rdma_cm_id id;
332 struct rdma_bind_list *bind_list;
333 struct hlist_node node;
334 struct list_head list; /* listen_any_list or cma_device.list */
335 struct list_head listen_list; /* per device listens */
336 struct cma_device *cma_dev;
337 struct list_head mc_list;
340 enum rdma_cm_state state;
342 struct mutex qp_mutex;
344 struct completion comp;
346 struct mutex handler_mutex;
350 struct ib_sa_query *query;
367 enum ib_gid_type gid_type;
370 struct cma_multicast {
371 struct rdma_id_private *id_priv;
373 struct ib_sa_multicast *ib;
375 struct list_head list;
377 struct sockaddr_storage addr;
384 struct work_struct work;
385 struct rdma_id_private *id;
386 enum rdma_cm_state old_state;
387 enum rdma_cm_state new_state;
388 struct rdma_cm_event event;
391 struct cma_ndev_work {
392 struct work_struct work;
393 struct rdma_id_private *id;
394 struct rdma_cm_event event;
397 struct iboe_mcast_work {
398 struct work_struct work;
399 struct rdma_id_private *id;
400 struct cma_multicast *mc;
413 u8 ip_version; /* IP version: 7:4 */
415 union cma_ip_addr src_addr;
416 union cma_ip_addr dst_addr;
419 #define CMA_VERSION 0x00
421 struct cma_req_info {
422 struct ib_device *device;
424 union ib_gid local_gid;
430 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
435 spin_lock_irqsave(&id_priv->lock, flags);
436 ret = (id_priv->state == comp);
437 spin_unlock_irqrestore(&id_priv->lock, flags);
441 static int cma_comp_exch(struct rdma_id_private *id_priv,
442 enum rdma_cm_state comp, enum rdma_cm_state exch)
447 spin_lock_irqsave(&id_priv->lock, flags);
448 if ((ret = (id_priv->state == comp)))
449 id_priv->state = exch;
450 spin_unlock_irqrestore(&id_priv->lock, flags);
454 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
455 enum rdma_cm_state exch)
458 enum rdma_cm_state old;
460 spin_lock_irqsave(&id_priv->lock, flags);
461 old = id_priv->state;
462 id_priv->state = exch;
463 spin_unlock_irqrestore(&id_priv->lock, flags);
467 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
469 return hdr->ip_version >> 4;
472 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
474 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
477 static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
479 struct in_device *in_dev = NULL;
483 in_dev = __in_dev_get_rtnl(ndev);
486 ip_mc_inc_group(in_dev,
487 *(__be32 *)(mgid->raw + 12));
489 ip_mc_dec_group(in_dev,
490 *(__be32 *)(mgid->raw + 12));
494 return (in_dev) ? 0 : -ENODEV;
497 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
498 struct cma_device *cma_dev)
500 cma_ref_dev(cma_dev);
501 id_priv->cma_dev = cma_dev;
502 id_priv->gid_type = 0;
503 id_priv->id.device = cma_dev->device;
504 id_priv->id.route.addr.dev_addr.transport =
505 rdma_node_get_transport(cma_dev->device->node_type);
506 list_add_tail(&id_priv->list, &cma_dev->id_list);
509 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
510 struct cma_device *cma_dev)
512 _cma_attach_to_dev(id_priv, cma_dev);
514 cma_dev->default_gid_type[id_priv->id.port_num -
515 rdma_start_port(cma_dev->device)];
518 void cma_deref_dev(struct cma_device *cma_dev)
520 if (atomic_dec_and_test(&cma_dev->refcount))
521 complete(&cma_dev->comp);
524 static inline void release_mc(struct kref *kref)
526 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
528 kfree(mc->multicast.ib);
532 static void cma_release_dev(struct rdma_id_private *id_priv)
535 list_del(&id_priv->list);
536 cma_deref_dev(id_priv->cma_dev);
537 id_priv->cma_dev = NULL;
541 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
543 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
546 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
548 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
551 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
553 return id_priv->id.route.addr.src_addr.ss_family;
556 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
558 struct ib_sa_mcmember_rec rec;
562 if (qkey && id_priv->qkey != qkey)
568 id_priv->qkey = qkey;
572 switch (id_priv->id.ps) {
575 id_priv->qkey = RDMA_UDP_QKEY;
578 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
579 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
580 id_priv->id.port_num, &rec.mgid,
583 id_priv->qkey = be32_to_cpu(rec.qkey);
591 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
593 dev_addr->dev_type = ARPHRD_INFINIBAND;
594 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
595 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
598 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
602 if (addr->sa_family != AF_IB) {
603 ret = rdma_translate_ip(addr, dev_addr, NULL);
605 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
612 static inline int cma_validate_port(struct ib_device *device, u8 port,
613 enum ib_gid_type gid_type,
614 union ib_gid *gid, int dev_type,
618 struct net_device *ndev = NULL;
620 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
623 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
626 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
627 ndev = dev_get_by_index(&init_net, bound_if_index);
628 if (ndev && ndev->flags & IFF_LOOPBACK) {
629 pr_info("detected loopback device\n");
632 if (!device->get_netdev)
635 ndev = device->get_netdev(device, port);
640 gid_type = IB_GID_TYPE_IB;
643 ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
652 static int cma_acquire_dev(struct rdma_id_private *id_priv,
653 struct rdma_id_private *listen_id_priv)
655 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
656 struct cma_device *cma_dev;
657 union ib_gid gid, iboe_gid, *gidp;
661 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
662 id_priv->id.ps == RDMA_PS_IPOIB)
666 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
669 memcpy(&gid, dev_addr->src_dev_addr +
670 rdma_addr_gid_offset(dev_addr), sizeof gid);
672 if (listen_id_priv) {
673 cma_dev = listen_id_priv->cma_dev;
674 port = listen_id_priv->id.port_num;
675 gidp = rdma_protocol_roce(cma_dev->device, port) ?
678 ret = cma_validate_port(cma_dev->device, port,
679 rdma_protocol_ib(cma_dev->device, port) ?
681 listen_id_priv->gid_type, gidp,
683 dev_addr->bound_dev_if);
685 id_priv->id.port_num = port;
690 list_for_each_entry(cma_dev, &dev_list, list) {
691 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
692 if (listen_id_priv &&
693 listen_id_priv->cma_dev == cma_dev &&
694 listen_id_priv->id.port_num == port)
697 gidp = rdma_protocol_roce(cma_dev->device, port) ?
700 ret = cma_validate_port(cma_dev->device, port,
701 rdma_protocol_ib(cma_dev->device, port) ?
703 cma_dev->default_gid_type[port - 1],
704 gidp, dev_addr->dev_type,
705 dev_addr->bound_dev_if);
707 id_priv->id.port_num = port;
715 cma_attach_to_dev(id_priv, cma_dev);
722 * Select the source IB device and address to reach the destination IB address.
724 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
726 struct cma_device *cma_dev, *cur_dev;
727 struct sockaddr_ib *addr;
728 union ib_gid gid, sgid, *dgid;
731 enum ib_port_state port_state;
735 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
736 dgid = (union ib_gid *) &addr->sib_addr;
737 pkey = ntohs(addr->sib_pkey);
739 list_for_each_entry(cur_dev, &dev_list, list) {
740 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
741 if (!rdma_cap_af_ib(cur_dev->device, p))
744 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
747 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
749 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
752 if (!memcmp(&gid, dgid, sizeof(gid))) {
755 id_priv->id.port_num = p;
759 if (!cma_dev && (gid.global.subnet_prefix ==
760 dgid->global.subnet_prefix) &&
761 port_state == IB_PORT_ACTIVE) {
764 id_priv->id.port_num = p;
774 cma_attach_to_dev(id_priv, cma_dev);
775 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
776 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
777 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
781 static void cma_deref_id(struct rdma_id_private *id_priv)
783 if (atomic_dec_and_test(&id_priv->refcount))
784 complete(&id_priv->comp);
787 struct rdma_cm_id *rdma_create_id(struct net *net,
788 rdma_cm_event_handler event_handler,
789 void *context, enum rdma_port_space ps,
790 enum ib_qp_type qp_type)
792 struct rdma_id_private *id_priv;
794 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
796 return ERR_PTR(-ENOMEM);
798 id_priv->owner = task_pid_nr(current);
799 id_priv->state = RDMA_CM_IDLE;
800 id_priv->id.context = context;
801 id_priv->id.event_handler = event_handler;
803 id_priv->id.qp_type = qp_type;
804 id_priv->tos_set = false;
805 spin_lock_init(&id_priv->lock);
806 mutex_init(&id_priv->qp_mutex);
807 init_completion(&id_priv->comp);
808 atomic_set(&id_priv->refcount, 1);
809 mutex_init(&id_priv->handler_mutex);
810 INIT_LIST_HEAD(&id_priv->listen_list);
811 INIT_LIST_HEAD(&id_priv->mc_list);
812 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
813 id_priv->id.route.addr.dev_addr.net = get_net(net);
817 EXPORT_SYMBOL(rdma_create_id);
819 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
821 struct ib_qp_attr qp_attr;
822 int qp_attr_mask, ret;
824 qp_attr.qp_state = IB_QPS_INIT;
825 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
829 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
833 qp_attr.qp_state = IB_QPS_RTR;
834 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
838 qp_attr.qp_state = IB_QPS_RTS;
840 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
845 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
847 struct ib_qp_attr qp_attr;
848 int qp_attr_mask, ret;
850 qp_attr.qp_state = IB_QPS_INIT;
851 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
855 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
858 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
859 struct ib_qp_init_attr *qp_init_attr)
861 struct rdma_id_private *id_priv;
865 id_priv = container_of(id, struct rdma_id_private, id);
866 if (id->device != pd->device)
869 qp_init_attr->port_num = id->port_num;
870 qp = ib_create_qp(pd, qp_init_attr);
874 if (id->qp_type == IB_QPT_UD)
875 ret = cma_init_ud_qp(id_priv, qp);
877 ret = cma_init_conn_qp(id_priv, qp);
882 id_priv->qp_num = qp->qp_num;
883 id_priv->srq = (qp->srq != NULL);
889 EXPORT_SYMBOL(rdma_create_qp);
891 void rdma_destroy_qp(struct rdma_cm_id *id)
893 struct rdma_id_private *id_priv;
895 id_priv = container_of(id, struct rdma_id_private, id);
896 mutex_lock(&id_priv->qp_mutex);
897 ib_destroy_qp(id_priv->id.qp);
898 id_priv->id.qp = NULL;
899 mutex_unlock(&id_priv->qp_mutex);
901 EXPORT_SYMBOL(rdma_destroy_qp);
903 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
904 struct rdma_conn_param *conn_param)
906 struct ib_qp_attr qp_attr;
907 int qp_attr_mask, ret;
910 mutex_lock(&id_priv->qp_mutex);
911 if (!id_priv->id.qp) {
916 /* Need to update QP attributes from default values. */
917 qp_attr.qp_state = IB_QPS_INIT;
918 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
922 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
926 qp_attr.qp_state = IB_QPS_RTR;
927 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
931 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
932 rdma_ah_read_grh(&qp_attr.ah_attr)->sgid_index,
937 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
940 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
941 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
943 mutex_unlock(&id_priv->qp_mutex);
947 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
948 struct rdma_conn_param *conn_param)
950 struct ib_qp_attr qp_attr;
951 int qp_attr_mask, ret;
953 mutex_lock(&id_priv->qp_mutex);
954 if (!id_priv->id.qp) {
959 qp_attr.qp_state = IB_QPS_RTS;
960 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
965 qp_attr.max_rd_atomic = conn_param->initiator_depth;
966 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
968 mutex_unlock(&id_priv->qp_mutex);
972 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
974 struct ib_qp_attr qp_attr;
977 mutex_lock(&id_priv->qp_mutex);
978 if (!id_priv->id.qp) {
983 qp_attr.qp_state = IB_QPS_ERR;
984 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
986 mutex_unlock(&id_priv->qp_mutex);
990 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
991 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
993 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
997 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
1000 pkey = ib_addr_get_pkey(dev_addr);
1002 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
1003 pkey, &qp_attr->pkey_index);
1007 qp_attr->port_num = id_priv->id.port_num;
1008 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
1010 if (id_priv->id.qp_type == IB_QPT_UD) {
1011 ret = cma_set_qkey(id_priv, 0);
1015 qp_attr->qkey = id_priv->qkey;
1016 *qp_attr_mask |= IB_QP_QKEY;
1018 qp_attr->qp_access_flags = 0;
1019 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1024 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1027 struct rdma_id_private *id_priv;
1030 id_priv = container_of(id, struct rdma_id_private, id);
1031 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1032 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1033 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1035 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1038 if (qp_attr->qp_state == IB_QPS_RTR)
1039 qp_attr->rq_psn = id_priv->seq_num;
1040 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1041 if (!id_priv->cm_id.iw) {
1042 qp_attr->qp_access_flags = 0;
1043 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1045 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1052 EXPORT_SYMBOL(rdma_init_qp_attr);
1054 static inline int cma_zero_addr(struct sockaddr *addr)
1056 switch (addr->sa_family) {
1058 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1060 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
1062 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
1068 static inline int cma_loopback_addr(struct sockaddr *addr)
1070 switch (addr->sa_family) {
1072 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
1074 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1076 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1082 static inline int cma_any_addr(struct sockaddr *addr)
1084 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1087 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1089 if (src->sa_family != dst->sa_family)
1092 switch (src->sa_family) {
1094 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1095 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1097 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1098 &((struct sockaddr_in6 *) dst)->sin6_addr);
1100 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1101 &((struct sockaddr_ib *) dst)->sib_addr);
1105 static __be16 cma_port(struct sockaddr *addr)
1107 struct sockaddr_ib *sib;
1109 switch (addr->sa_family) {
1111 return ((struct sockaddr_in *) addr)->sin_port;
1113 return ((struct sockaddr_in6 *) addr)->sin6_port;
1115 sib = (struct sockaddr_ib *) addr;
1116 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1117 be64_to_cpu(sib->sib_sid_mask)));
1123 static inline int cma_any_port(struct sockaddr *addr)
1125 return !cma_port(addr);
1128 static void cma_save_ib_info(struct sockaddr *src_addr,
1129 struct sockaddr *dst_addr,
1130 struct rdma_cm_id *listen_id,
1131 struct sa_path_rec *path)
1133 struct sockaddr_ib *listen_ib, *ib;
1135 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1137 ib = (struct sockaddr_ib *)src_addr;
1138 ib->sib_family = AF_IB;
1140 ib->sib_pkey = path->pkey;
1141 ib->sib_flowinfo = path->flow_label;
1142 memcpy(&ib->sib_addr, &path->sgid, 16);
1143 ib->sib_sid = sa_path_get_service_id(path);
1144 ib->sib_scope_id = 0;
1146 ib->sib_pkey = listen_ib->sib_pkey;
1147 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1148 ib->sib_addr = listen_ib->sib_addr;
1149 ib->sib_sid = listen_ib->sib_sid;
1150 ib->sib_scope_id = listen_ib->sib_scope_id;
1152 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1155 ib = (struct sockaddr_ib *)dst_addr;
1156 ib->sib_family = AF_IB;
1158 ib->sib_pkey = path->pkey;
1159 ib->sib_flowinfo = path->flow_label;
1160 memcpy(&ib->sib_addr, &path->dgid, 16);
1165 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1166 struct sockaddr_in *dst_addr,
1167 struct cma_hdr *hdr,
1171 *src_addr = (struct sockaddr_in) {
1172 .sin_family = AF_INET,
1173 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1174 .sin_port = local_port,
1179 *dst_addr = (struct sockaddr_in) {
1180 .sin_family = AF_INET,
1181 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1182 .sin_port = hdr->port,
1187 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1188 struct sockaddr_in6 *dst_addr,
1189 struct cma_hdr *hdr,
1193 *src_addr = (struct sockaddr_in6) {
1194 .sin6_family = AF_INET6,
1195 .sin6_addr = hdr->dst_addr.ip6,
1196 .sin6_port = local_port,
1201 *dst_addr = (struct sockaddr_in6) {
1202 .sin6_family = AF_INET6,
1203 .sin6_addr = hdr->src_addr.ip6,
1204 .sin6_port = hdr->port,
1209 static u16 cma_port_from_service_id(__be64 service_id)
1211 return (u16)be64_to_cpu(service_id);
1214 static int cma_save_ip_info(struct sockaddr *src_addr,
1215 struct sockaddr *dst_addr,
1216 struct ib_cm_event *ib_event,
1219 struct cma_hdr *hdr;
1222 hdr = ib_event->private_data;
1223 if (hdr->cma_version != CMA_VERSION)
1226 port = htons(cma_port_from_service_id(service_id));
1228 switch (cma_get_ip_ver(hdr)) {
1230 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1231 (struct sockaddr_in *)dst_addr, hdr, port);
1234 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1235 (struct sockaddr_in6 *)dst_addr, hdr, port);
1238 return -EAFNOSUPPORT;
1244 static int cma_save_net_info(struct sockaddr *src_addr,
1245 struct sockaddr *dst_addr,
1246 struct rdma_cm_id *listen_id,
1247 struct ib_cm_event *ib_event,
1248 sa_family_t sa_family, __be64 service_id)
1250 if (sa_family == AF_IB) {
1251 if (ib_event->event == IB_CM_REQ_RECEIVED)
1252 cma_save_ib_info(src_addr, dst_addr, listen_id,
1253 ib_event->param.req_rcvd.primary_path);
1254 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1255 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1259 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1262 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1263 struct cma_req_info *req)
1265 const struct ib_cm_req_event_param *req_param =
1266 &ib_event->param.req_rcvd;
1267 const struct ib_cm_sidr_req_event_param *sidr_param =
1268 &ib_event->param.sidr_req_rcvd;
1270 switch (ib_event->event) {
1271 case IB_CM_REQ_RECEIVED:
1272 req->device = req_param->listen_id->device;
1273 req->port = req_param->port;
1274 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1275 sizeof(req->local_gid));
1276 req->has_gid = true;
1278 sa_path_get_service_id(req_param->primary_path);
1279 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1280 if (req->pkey != req_param->bth_pkey)
1281 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1282 "RDMA CMA: in the future this may cause the request to be dropped\n",
1283 req_param->bth_pkey, req->pkey);
1285 case IB_CM_SIDR_REQ_RECEIVED:
1286 req->device = sidr_param->listen_id->device;
1287 req->port = sidr_param->port;
1288 req->has_gid = false;
1289 req->service_id = sidr_param->service_id;
1290 req->pkey = sidr_param->pkey;
1291 if (req->pkey != sidr_param->bth_pkey)
1292 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1293 "RDMA CMA: in the future this may cause the request to be dropped\n",
1294 sidr_param->bth_pkey, req->pkey);
1303 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1304 const struct sockaddr_in *dst_addr,
1305 const struct sockaddr_in *src_addr)
1307 __be32 daddr = dst_addr->sin_addr.s_addr,
1308 saddr = src_addr->sin_addr.s_addr;
1309 struct fib_result res;
1314 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1315 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1316 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1317 ipv4_is_loopback(saddr))
1320 memset(&fl4, 0, sizeof(fl4));
1321 fl4.flowi4_iif = net_dev->ifindex;
1326 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1327 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1333 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1334 const struct sockaddr_in6 *dst_addr,
1335 const struct sockaddr_in6 *src_addr)
1337 #if IS_ENABLED(CONFIG_IPV6)
1338 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1339 IPV6_ADDR_LINKLOCAL;
1340 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1341 &src_addr->sin6_addr, net_dev->ifindex,
1348 ret = rt->rt6i_idev->dev == net_dev;
1357 static bool validate_net_dev(struct net_device *net_dev,
1358 const struct sockaddr *daddr,
1359 const struct sockaddr *saddr)
1361 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1362 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1363 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1364 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1366 switch (daddr->sa_family) {
1368 return saddr->sa_family == AF_INET &&
1369 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1372 return saddr->sa_family == AF_INET6 &&
1373 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1380 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1381 const struct cma_req_info *req)
1383 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1384 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1385 *src_addr = (struct sockaddr *)&src_addr_storage;
1386 struct net_device *net_dev;
1387 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1390 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1393 return ERR_PTR(err);
1395 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1398 return ERR_PTR(-ENODEV);
1400 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1402 return ERR_PTR(-EHOSTUNREACH);
1408 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1410 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1413 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1414 const struct cma_hdr *hdr)
1416 struct sockaddr *addr = cma_src_addr(id_priv);
1418 struct in6_addr ip6_addr;
1420 if (cma_any_addr(addr) && !id_priv->afonly)
1423 switch (addr->sa_family) {
1425 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1426 if (cma_get_ip_ver(hdr) != 4)
1428 if (!cma_any_addr(addr) &&
1429 hdr->dst_addr.ip4.addr != ip4_addr)
1433 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1434 if (cma_get_ip_ver(hdr) != 6)
1436 if (!cma_any_addr(addr) &&
1437 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1449 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1451 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1452 enum rdma_transport_type transport =
1453 rdma_node_get_transport(device->node_type);
1455 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1458 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1460 struct ib_device *device = id->device;
1461 const int port_num = id->port_num ?: rdma_start_port(device);
1463 return cma_protocol_roce_dev_port(device, port_num);
1466 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1467 const struct net_device *net_dev,
1470 const struct rdma_addr *addr = &id->route.addr;
1473 /* This request is an AF_IB request or a RoCE request */
1474 return (!id->port_num || id->port_num == port_num) &&
1475 (addr->src_addr.ss_family == AF_IB ||
1476 cma_protocol_roce_dev_port(id->device, port_num));
1478 return !addr->dev_addr.bound_dev_if ||
1479 (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1480 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1483 static struct rdma_id_private *cma_find_listener(
1484 const struct rdma_bind_list *bind_list,
1485 const struct ib_cm_id *cm_id,
1486 const struct ib_cm_event *ib_event,
1487 const struct cma_req_info *req,
1488 const struct net_device *net_dev)
1490 struct rdma_id_private *id_priv, *id_priv_dev;
1493 return ERR_PTR(-EINVAL);
1495 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1496 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1497 if (id_priv->id.device == cm_id->device &&
1498 cma_match_net_dev(&id_priv->id, net_dev, req->port))
1500 list_for_each_entry(id_priv_dev,
1501 &id_priv->listen_list,
1503 if (id_priv_dev->id.device == cm_id->device &&
1504 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1510 return ERR_PTR(-EINVAL);
1513 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1514 struct ib_cm_event *ib_event,
1515 struct net_device **net_dev)
1517 struct cma_req_info req;
1518 struct rdma_bind_list *bind_list;
1519 struct rdma_id_private *id_priv;
1522 err = cma_save_req_info(ib_event, &req);
1524 return ERR_PTR(err);
1526 *net_dev = cma_get_net_dev(ib_event, &req);
1527 if (IS_ERR(*net_dev)) {
1528 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1529 /* Assuming the protocol is AF_IB */
1531 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1532 /* TODO find the net dev matching the request parameters
1533 * through the RoCE GID table */
1536 return ERR_CAST(*net_dev);
1540 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1541 rdma_ps_from_service_id(req.service_id),
1542 cma_port_from_service_id(req.service_id));
1543 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1544 if (IS_ERR(id_priv) && *net_dev) {
1552 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1554 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1557 static void cma_cancel_route(struct rdma_id_private *id_priv)
1559 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1561 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1565 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1567 struct rdma_id_private *dev_id_priv;
1570 * Remove from listen_any_list to prevent added devices from spawning
1571 * additional listen requests.
1574 list_del(&id_priv->list);
1576 while (!list_empty(&id_priv->listen_list)) {
1577 dev_id_priv = list_entry(id_priv->listen_list.next,
1578 struct rdma_id_private, listen_list);
1579 /* sync with device removal to avoid duplicate destruction */
1580 list_del_init(&dev_id_priv->list);
1581 list_del(&dev_id_priv->listen_list);
1582 mutex_unlock(&lock);
1584 rdma_destroy_id(&dev_id_priv->id);
1587 mutex_unlock(&lock);
1590 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1591 enum rdma_cm_state state)
1594 case RDMA_CM_ADDR_QUERY:
1595 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1597 case RDMA_CM_ROUTE_QUERY:
1598 cma_cancel_route(id_priv);
1600 case RDMA_CM_LISTEN:
1601 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1602 cma_cancel_listens(id_priv);
1609 static void cma_release_port(struct rdma_id_private *id_priv)
1611 struct rdma_bind_list *bind_list = id_priv->bind_list;
1612 struct net *net = id_priv->id.route.addr.dev_addr.net;
1618 hlist_del(&id_priv->node);
1619 if (hlist_empty(&bind_list->owners)) {
1620 cma_ps_remove(net, bind_list->ps, bind_list->port);
1623 mutex_unlock(&lock);
1626 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1628 struct cma_multicast *mc;
1630 while (!list_empty(&id_priv->mc_list)) {
1631 mc = container_of(id_priv->mc_list.next,
1632 struct cma_multicast, list);
1633 list_del(&mc->list);
1634 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1635 id_priv->id.port_num)) {
1636 ib_sa_free_multicast(mc->multicast.ib);
1639 if (mc->igmp_joined) {
1640 struct rdma_dev_addr *dev_addr =
1641 &id_priv->id.route.addr.dev_addr;
1642 struct net_device *ndev = NULL;
1644 if (dev_addr->bound_dev_if)
1645 ndev = dev_get_by_index(&init_net,
1646 dev_addr->bound_dev_if);
1649 &mc->multicast.ib->rec.mgid,
1654 kref_put(&mc->mcref, release_mc);
1659 void rdma_destroy_id(struct rdma_cm_id *id)
1661 struct rdma_id_private *id_priv;
1662 enum rdma_cm_state state;
1664 id_priv = container_of(id, struct rdma_id_private, id);
1665 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1666 cma_cancel_operation(id_priv, state);
1669 * Wait for any active callback to finish. New callbacks will find
1670 * the id_priv state set to destroying and abort.
1672 mutex_lock(&id_priv->handler_mutex);
1673 mutex_unlock(&id_priv->handler_mutex);
1675 if (id_priv->cma_dev) {
1676 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1677 if (id_priv->cm_id.ib)
1678 ib_destroy_cm_id(id_priv->cm_id.ib);
1679 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1680 if (id_priv->cm_id.iw)
1681 iw_destroy_cm_id(id_priv->cm_id.iw);
1683 cma_leave_mc_groups(id_priv);
1684 cma_release_dev(id_priv);
1687 cma_release_port(id_priv);
1688 cma_deref_id(id_priv);
1689 wait_for_completion(&id_priv->comp);
1691 if (id_priv->internal_id)
1692 cma_deref_id(id_priv->id.context);
1694 kfree(id_priv->id.route.path_rec);
1695 put_net(id_priv->id.route.addr.dev_addr.net);
1698 EXPORT_SYMBOL(rdma_destroy_id);
1700 static int cma_rep_recv(struct rdma_id_private *id_priv)
1704 ret = cma_modify_qp_rtr(id_priv, NULL);
1708 ret = cma_modify_qp_rts(id_priv, NULL);
1712 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1718 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1719 cma_modify_qp_err(id_priv);
1720 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1725 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1726 struct ib_cm_rep_event_param *rep_data,
1729 event->param.conn.private_data = private_data;
1730 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1731 event->param.conn.responder_resources = rep_data->responder_resources;
1732 event->param.conn.initiator_depth = rep_data->initiator_depth;
1733 event->param.conn.flow_control = rep_data->flow_control;
1734 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1735 event->param.conn.srq = rep_data->srq;
1736 event->param.conn.qp_num = rep_data->remote_qpn;
1739 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1741 struct rdma_id_private *id_priv = cm_id->context;
1742 struct rdma_cm_event event;
1745 mutex_lock(&id_priv->handler_mutex);
1746 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1747 id_priv->state != RDMA_CM_CONNECT) ||
1748 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1749 id_priv->state != RDMA_CM_DISCONNECT))
1752 memset(&event, 0, sizeof event);
1753 switch (ib_event->event) {
1754 case IB_CM_REQ_ERROR:
1755 case IB_CM_REP_ERROR:
1756 event.event = RDMA_CM_EVENT_UNREACHABLE;
1757 event.status = -ETIMEDOUT;
1759 case IB_CM_REP_RECEIVED:
1760 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1761 (id_priv->id.qp_type != IB_QPT_UD))
1762 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1763 if (id_priv->id.qp) {
1764 event.status = cma_rep_recv(id_priv);
1765 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1766 RDMA_CM_EVENT_ESTABLISHED;
1768 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1770 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1771 ib_event->private_data);
1773 case IB_CM_RTU_RECEIVED:
1774 case IB_CM_USER_ESTABLISHED:
1775 event.event = RDMA_CM_EVENT_ESTABLISHED;
1777 case IB_CM_DREQ_ERROR:
1778 event.status = -ETIMEDOUT; /* fall through */
1779 case IB_CM_DREQ_RECEIVED:
1780 case IB_CM_DREP_RECEIVED:
1781 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1782 RDMA_CM_DISCONNECT))
1784 event.event = RDMA_CM_EVENT_DISCONNECTED;
1786 case IB_CM_TIMEWAIT_EXIT:
1787 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1789 case IB_CM_MRA_RECEIVED:
1792 case IB_CM_REJ_RECEIVED:
1793 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1794 ib_event->param.rej_rcvd.reason));
1795 cma_modify_qp_err(id_priv);
1796 event.status = ib_event->param.rej_rcvd.reason;
1797 event.event = RDMA_CM_EVENT_REJECTED;
1798 event.param.conn.private_data = ib_event->private_data;
1799 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1802 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1807 ret = id_priv->id.event_handler(&id_priv->id, &event);
1809 /* Destroy the CM ID by returning a non-zero value. */
1810 id_priv->cm_id.ib = NULL;
1811 cma_exch(id_priv, RDMA_CM_DESTROYING);
1812 mutex_unlock(&id_priv->handler_mutex);
1813 rdma_destroy_id(&id_priv->id);
1817 mutex_unlock(&id_priv->handler_mutex);
1821 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1822 struct ib_cm_event *ib_event,
1823 struct net_device *net_dev)
1825 struct rdma_id_private *id_priv;
1826 struct rdma_cm_id *id;
1827 struct rdma_route *rt;
1828 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1829 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
1830 const __be64 service_id = sa_path_get_service_id(path);
1833 id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1834 listen_id->event_handler, listen_id->context,
1835 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1839 id_priv = container_of(id, struct rdma_id_private, id);
1840 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1841 (struct sockaddr *)&id->route.addr.dst_addr,
1842 listen_id, ib_event, ss_family, service_id))
1846 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1847 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1852 rt->path_rec[0] = *path;
1853 if (rt->num_paths == 2)
1854 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1857 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1861 if (!cma_protocol_roce(listen_id) &&
1862 cma_any_addr(cma_src_addr(id_priv))) {
1863 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1864 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1865 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1866 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1867 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1872 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1874 id_priv->state = RDMA_CM_CONNECT;
1878 rdma_destroy_id(id);
1882 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1883 struct ib_cm_event *ib_event,
1884 struct net_device *net_dev)
1886 struct rdma_id_private *id_priv;
1887 struct rdma_cm_id *id;
1888 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1889 struct net *net = listen_id->route.addr.dev_addr.net;
1892 id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1893 listen_id->ps, IB_QPT_UD);
1897 id_priv = container_of(id, struct rdma_id_private, id);
1898 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1899 (struct sockaddr *)&id->route.addr.dst_addr,
1900 listen_id, ib_event, ss_family,
1901 ib_event->param.sidr_req_rcvd.service_id))
1905 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1909 if (!cma_any_addr(cma_src_addr(id_priv))) {
1910 ret = cma_translate_addr(cma_src_addr(id_priv),
1911 &id->route.addr.dev_addr);
1917 id_priv->state = RDMA_CM_CONNECT;
1920 rdma_destroy_id(id);
1924 static void cma_set_req_event_data(struct rdma_cm_event *event,
1925 struct ib_cm_req_event_param *req_data,
1926 void *private_data, int offset)
1928 event->param.conn.private_data = private_data + offset;
1929 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1930 event->param.conn.responder_resources = req_data->responder_resources;
1931 event->param.conn.initiator_depth = req_data->initiator_depth;
1932 event->param.conn.flow_control = req_data->flow_control;
1933 event->param.conn.retry_count = req_data->retry_count;
1934 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1935 event->param.conn.srq = req_data->srq;
1936 event->param.conn.qp_num = req_data->remote_qpn;
1939 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1941 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1942 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1943 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1944 (id->qp_type == IB_QPT_UD)) ||
1948 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1950 struct rdma_id_private *listen_id, *conn_id = NULL;
1951 struct rdma_cm_event event;
1952 struct net_device *net_dev;
1955 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1956 if (IS_ERR(listen_id))
1957 return PTR_ERR(listen_id);
1959 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1964 mutex_lock(&listen_id->handler_mutex);
1965 if (listen_id->state != RDMA_CM_LISTEN) {
1966 ret = -ECONNABORTED;
1970 memset(&event, 0, sizeof event);
1971 offset = cma_user_data_offset(listen_id);
1972 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1973 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1974 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1975 event.param.ud.private_data = ib_event->private_data + offset;
1976 event.param.ud.private_data_len =
1977 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1979 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1980 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1981 ib_event->private_data, offset);
1988 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1989 ret = cma_acquire_dev(conn_id, listen_id);
1993 conn_id->cm_id.ib = cm_id;
1994 cm_id->context = conn_id;
1995 cm_id->cm_handler = cma_ib_handler;
1998 * Protect against the user destroying conn_id from another thread
1999 * until we're done accessing it.
2001 atomic_inc(&conn_id->refcount);
2002 ret = conn_id->id.event_handler(&conn_id->id, &event);
2006 * Acquire mutex to prevent user executing rdma_destroy_id()
2007 * while we're accessing the cm_id.
2010 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2011 (conn_id->id.qp_type != IB_QPT_UD))
2012 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2013 mutex_unlock(&lock);
2014 mutex_unlock(&conn_id->handler_mutex);
2015 mutex_unlock(&listen_id->handler_mutex);
2016 cma_deref_id(conn_id);
2022 cma_deref_id(conn_id);
2023 /* Destroy the CM ID by returning a non-zero value. */
2024 conn_id->cm_id.ib = NULL;
2026 cma_exch(conn_id, RDMA_CM_DESTROYING);
2027 mutex_unlock(&conn_id->handler_mutex);
2029 mutex_unlock(&listen_id->handler_mutex);
2031 rdma_destroy_id(&conn_id->id);
2040 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2042 if (addr->sa_family == AF_IB)
2043 return ((struct sockaddr_ib *) addr)->sib_sid;
2045 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2047 EXPORT_SYMBOL(rdma_get_service_id);
2049 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2051 struct rdma_id_private *id_priv = iw_id->context;
2052 struct rdma_cm_event event;
2054 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2055 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2057 mutex_lock(&id_priv->handler_mutex);
2058 if (id_priv->state != RDMA_CM_CONNECT)
2061 memset(&event, 0, sizeof event);
2062 switch (iw_event->event) {
2063 case IW_CM_EVENT_CLOSE:
2064 event.event = RDMA_CM_EVENT_DISCONNECTED;
2066 case IW_CM_EVENT_CONNECT_REPLY:
2067 memcpy(cma_src_addr(id_priv), laddr,
2068 rdma_addr_size(laddr));
2069 memcpy(cma_dst_addr(id_priv), raddr,
2070 rdma_addr_size(raddr));
2071 switch (iw_event->status) {
2073 event.event = RDMA_CM_EVENT_ESTABLISHED;
2074 event.param.conn.initiator_depth = iw_event->ird;
2075 event.param.conn.responder_resources = iw_event->ord;
2079 event.event = RDMA_CM_EVENT_REJECTED;
2082 event.event = RDMA_CM_EVENT_UNREACHABLE;
2085 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2089 case IW_CM_EVENT_ESTABLISHED:
2090 event.event = RDMA_CM_EVENT_ESTABLISHED;
2091 event.param.conn.initiator_depth = iw_event->ird;
2092 event.param.conn.responder_resources = iw_event->ord;
2098 event.status = iw_event->status;
2099 event.param.conn.private_data = iw_event->private_data;
2100 event.param.conn.private_data_len = iw_event->private_data_len;
2101 ret = id_priv->id.event_handler(&id_priv->id, &event);
2103 /* Destroy the CM ID by returning a non-zero value. */
2104 id_priv->cm_id.iw = NULL;
2105 cma_exch(id_priv, RDMA_CM_DESTROYING);
2106 mutex_unlock(&id_priv->handler_mutex);
2107 rdma_destroy_id(&id_priv->id);
2112 mutex_unlock(&id_priv->handler_mutex);
2116 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2117 struct iw_cm_event *iw_event)
2119 struct rdma_cm_id *new_cm_id;
2120 struct rdma_id_private *listen_id, *conn_id;
2121 struct rdma_cm_event event;
2122 int ret = -ECONNABORTED;
2123 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2124 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2126 listen_id = cm_id->context;
2128 mutex_lock(&listen_id->handler_mutex);
2129 if (listen_id->state != RDMA_CM_LISTEN)
2132 /* Create a new RDMA id for the new IW CM ID */
2133 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2134 listen_id->id.event_handler,
2135 listen_id->id.context,
2136 RDMA_PS_TCP, IB_QPT_RC);
2137 if (IS_ERR(new_cm_id)) {
2141 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2142 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2143 conn_id->state = RDMA_CM_CONNECT;
2145 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
2147 mutex_unlock(&conn_id->handler_mutex);
2148 rdma_destroy_id(new_cm_id);
2152 ret = cma_acquire_dev(conn_id, listen_id);
2154 mutex_unlock(&conn_id->handler_mutex);
2155 rdma_destroy_id(new_cm_id);
2159 conn_id->cm_id.iw = cm_id;
2160 cm_id->context = conn_id;
2161 cm_id->cm_handler = cma_iw_handler;
2163 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2164 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2166 memset(&event, 0, sizeof event);
2167 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2168 event.param.conn.private_data = iw_event->private_data;
2169 event.param.conn.private_data_len = iw_event->private_data_len;
2170 event.param.conn.initiator_depth = iw_event->ird;
2171 event.param.conn.responder_resources = iw_event->ord;
2174 * Protect against the user destroying conn_id from another thread
2175 * until we're done accessing it.
2177 atomic_inc(&conn_id->refcount);
2178 ret = conn_id->id.event_handler(&conn_id->id, &event);
2180 /* User wants to destroy the CM ID */
2181 conn_id->cm_id.iw = NULL;
2182 cma_exch(conn_id, RDMA_CM_DESTROYING);
2183 mutex_unlock(&conn_id->handler_mutex);
2184 cma_deref_id(conn_id);
2185 rdma_destroy_id(&conn_id->id);
2189 mutex_unlock(&conn_id->handler_mutex);
2190 cma_deref_id(conn_id);
2193 mutex_unlock(&listen_id->handler_mutex);
2197 static int cma_ib_listen(struct rdma_id_private *id_priv)
2199 struct sockaddr *addr;
2200 struct ib_cm_id *id;
2203 addr = cma_src_addr(id_priv);
2204 svc_id = rdma_get_service_id(&id_priv->id, addr);
2205 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2208 id_priv->cm_id.ib = id;
2213 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2216 struct iw_cm_id *id;
2218 id = iw_create_cm_id(id_priv->id.device,
2219 iw_conn_req_handler,
2224 id->tos = id_priv->tos;
2225 id_priv->cm_id.iw = id;
2227 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2228 rdma_addr_size(cma_src_addr(id_priv)));
2230 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2233 iw_destroy_cm_id(id_priv->cm_id.iw);
2234 id_priv->cm_id.iw = NULL;
2240 static int cma_listen_handler(struct rdma_cm_id *id,
2241 struct rdma_cm_event *event)
2243 struct rdma_id_private *id_priv = id->context;
2245 id->context = id_priv->id.context;
2246 id->event_handler = id_priv->id.event_handler;
2247 return id_priv->id.event_handler(id, event);
2250 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2251 struct cma_device *cma_dev)
2253 struct rdma_id_private *dev_id_priv;
2254 struct rdma_cm_id *id;
2255 struct net *net = id_priv->id.route.addr.dev_addr.net;
2258 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2261 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2262 id_priv->id.qp_type);
2266 dev_id_priv = container_of(id, struct rdma_id_private, id);
2268 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2269 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2270 rdma_addr_size(cma_src_addr(id_priv)));
2272 _cma_attach_to_dev(dev_id_priv, cma_dev);
2273 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2274 atomic_inc(&id_priv->refcount);
2275 dev_id_priv->internal_id = 1;
2276 dev_id_priv->afonly = id_priv->afonly;
2278 ret = rdma_listen(id, id_priv->backlog);
2280 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2281 ret, cma_dev->device->name);
2284 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2286 struct cma_device *cma_dev;
2289 list_add_tail(&id_priv->list, &listen_any_list);
2290 list_for_each_entry(cma_dev, &dev_list, list)
2291 cma_listen_on_dev(id_priv, cma_dev);
2292 mutex_unlock(&lock);
2295 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2297 struct rdma_id_private *id_priv;
2299 id_priv = container_of(id, struct rdma_id_private, id);
2300 id_priv->tos = (u8) tos;
2301 id_priv->tos_set = true;
2303 EXPORT_SYMBOL(rdma_set_service_type);
2305 static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2308 struct cma_work *work = context;
2309 struct rdma_route *route;
2311 route = &work->id->id.route;
2314 route->num_paths = 1;
2315 *route->path_rec = *path_rec;
2317 work->old_state = RDMA_CM_ROUTE_QUERY;
2318 work->new_state = RDMA_CM_ADDR_RESOLVED;
2319 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2320 work->event.status = status;
2321 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2325 queue_work(cma_wq, &work->work);
2328 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2329 struct cma_work *work)
2331 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2332 struct sa_path_rec path_rec;
2333 ib_sa_comp_mask comp_mask;
2334 struct sockaddr_in6 *sin6;
2335 struct sockaddr_ib *sib;
2337 memset(&path_rec, 0, sizeof path_rec);
2338 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2339 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2340 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2341 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2342 path_rec.numb_path = 1;
2343 path_rec.reversible = 1;
2344 sa_path_set_service_id(&path_rec,
2345 rdma_get_service_id(&id_priv->id,
2346 cma_dst_addr(id_priv)));
2348 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2349 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2350 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2352 switch (cma_family(id_priv)) {
2354 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2355 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2358 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2359 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2360 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2363 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2364 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2365 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2369 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2370 id_priv->id.port_num, &path_rec,
2371 comp_mask, timeout_ms,
2372 GFP_KERNEL, cma_query_handler,
2373 work, &id_priv->query);
2375 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2378 static void cma_work_handler(struct work_struct *_work)
2380 struct cma_work *work = container_of(_work, struct cma_work, work);
2381 struct rdma_id_private *id_priv = work->id;
2384 mutex_lock(&id_priv->handler_mutex);
2385 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2388 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2389 cma_exch(id_priv, RDMA_CM_DESTROYING);
2393 mutex_unlock(&id_priv->handler_mutex);
2394 cma_deref_id(id_priv);
2396 rdma_destroy_id(&id_priv->id);
2400 static void cma_ndev_work_handler(struct work_struct *_work)
2402 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2403 struct rdma_id_private *id_priv = work->id;
2406 mutex_lock(&id_priv->handler_mutex);
2407 if (id_priv->state == RDMA_CM_DESTROYING ||
2408 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2411 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2412 cma_exch(id_priv, RDMA_CM_DESTROYING);
2417 mutex_unlock(&id_priv->handler_mutex);
2418 cma_deref_id(id_priv);
2420 rdma_destroy_id(&id_priv->id);
2424 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2426 struct rdma_route *route = &id_priv->id.route;
2427 struct cma_work *work;
2430 work = kzalloc(sizeof *work, GFP_KERNEL);
2435 INIT_WORK(&work->work, cma_work_handler);
2436 work->old_state = RDMA_CM_ROUTE_QUERY;
2437 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2438 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2440 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2441 if (!route->path_rec) {
2446 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2452 kfree(route->path_rec);
2453 route->path_rec = NULL;
2459 int rdma_set_ib_paths(struct rdma_cm_id *id,
2460 struct sa_path_rec *path_rec, int num_paths)
2462 struct rdma_id_private *id_priv;
2465 id_priv = container_of(id, struct rdma_id_private, id);
2466 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2467 RDMA_CM_ROUTE_RESOLVED))
2470 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2472 if (!id->route.path_rec) {
2477 id->route.num_paths = num_paths;
2480 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2483 EXPORT_SYMBOL(rdma_set_ib_paths);
2485 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2487 struct cma_work *work;
2489 work = kzalloc(sizeof *work, GFP_KERNEL);
2494 INIT_WORK(&work->work, cma_work_handler);
2495 work->old_state = RDMA_CM_ROUTE_QUERY;
2496 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2497 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2498 queue_work(cma_wq, &work->work);
2502 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2505 struct net_device *dev;
2507 prio = rt_tos2priority(tos);
2508 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
2510 return netdev_get_prio_tc_map(dev, prio);
2512 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2513 if (is_vlan_dev(ndev))
2514 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2515 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2520 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2521 unsigned long supported_gids,
2522 enum ib_gid_type default_gid)
2524 if ((network_type == RDMA_NETWORK_IPV4 ||
2525 network_type == RDMA_NETWORK_IPV6) &&
2526 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2527 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2532 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2534 struct rdma_route *route = &id_priv->id.route;
2535 struct rdma_addr *addr = &route->addr;
2536 struct cma_work *work;
2538 struct net_device *ndev = NULL;
2539 enum ib_gid_type gid_type = IB_GID_TYPE_IB;
2540 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2541 rdma_start_port(id_priv->cma_dev->device)];
2542 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2545 work = kzalloc(sizeof *work, GFP_KERNEL);
2550 INIT_WORK(&work->work, cma_work_handler);
2552 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2553 if (!route->path_rec) {
2558 route->num_paths = 1;
2560 if (addr->dev_addr.bound_dev_if) {
2561 unsigned long supported_gids;
2563 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
2569 if (ndev->flags & IFF_LOOPBACK) {
2571 if (!id_priv->id.device->get_netdev) {
2576 ndev = id_priv->id.device->get_netdev(id_priv->id.device,
2577 id_priv->id.port_num);
2584 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2585 id_priv->id.port_num);
2586 gid_type = cma_route_gid_type(addr->dev_addr.network,
2589 route->path_rec->rec_type =
2590 sa_conv_gid_to_pathrec_type(gid_type);
2591 sa_path_set_ndev(route->path_rec, &init_net);
2592 sa_path_set_ifindex(route->path_rec, ndev->ifindex);
2599 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2601 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2602 &route->path_rec->sgid);
2603 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2604 &route->path_rec->dgid);
2606 /* Use the hint from IP Stack to select GID Type */
2607 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2608 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2609 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2611 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2612 /* TODO: get the hoplimit from the inet/inet6 device */
2613 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2615 route->path_rec->hop_limit = 1;
2616 route->path_rec->reversible = 1;
2617 route->path_rec->pkey = cpu_to_be16(0xffff);
2618 route->path_rec->mtu_selector = IB_SA_EQ;
2619 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2620 route->path_rec->traffic_class = tos;
2621 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2622 route->path_rec->rate_selector = IB_SA_EQ;
2623 route->path_rec->rate = iboe_get_rate(ndev);
2625 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2626 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2627 if (!route->path_rec->mtu) {
2632 work->old_state = RDMA_CM_ROUTE_QUERY;
2633 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2634 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2635 work->event.status = 0;
2637 queue_work(cma_wq, &work->work);
2642 kfree(route->path_rec);
2643 route->path_rec = NULL;
2649 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2651 struct rdma_id_private *id_priv;
2654 id_priv = container_of(id, struct rdma_id_private, id);
2655 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2658 atomic_inc(&id_priv->refcount);
2659 if (rdma_cap_ib_sa(id->device, id->port_num))
2660 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2661 else if (rdma_protocol_roce(id->device, id->port_num))
2662 ret = cma_resolve_iboe_route(id_priv);
2663 else if (rdma_protocol_iwarp(id->device, id->port_num))
2664 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2673 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2674 cma_deref_id(id_priv);
2677 EXPORT_SYMBOL(rdma_resolve_route);
2679 static void cma_set_loopback(struct sockaddr *addr)
2681 switch (addr->sa_family) {
2683 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2686 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2690 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2696 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2698 struct cma_device *cma_dev, *cur_dev;
2700 enum ib_port_state port_state;
2707 list_for_each_entry(cur_dev, &dev_list, list) {
2708 if (cma_family(id_priv) == AF_IB &&
2709 !rdma_cap_ib_cm(cur_dev->device, 1))
2715 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2716 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2717 port_state == IB_PORT_ACTIVE) {
2732 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2736 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2740 id_priv->id.route.addr.dev_addr.dev_type =
2741 (rdma_protocol_ib(cma_dev->device, p)) ?
2742 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2744 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2745 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2746 id_priv->id.port_num = p;
2747 cma_attach_to_dev(id_priv, cma_dev);
2748 cma_set_loopback(cma_src_addr(id_priv));
2750 mutex_unlock(&lock);
2754 static void addr_handler(int status, struct sockaddr *src_addr,
2755 struct rdma_dev_addr *dev_addr, void *context)
2757 struct rdma_id_private *id_priv = context;
2758 struct rdma_cm_event event;
2760 memset(&event, 0, sizeof event);
2761 mutex_lock(&id_priv->handler_mutex);
2762 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2763 RDMA_CM_ADDR_RESOLVED))
2766 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2767 if (!status && !id_priv->cma_dev) {
2768 status = cma_acquire_dev(id_priv, NULL);
2770 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
2773 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
2777 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2778 RDMA_CM_ADDR_BOUND))
2780 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2781 event.status = status;
2783 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2785 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2786 cma_exch(id_priv, RDMA_CM_DESTROYING);
2787 mutex_unlock(&id_priv->handler_mutex);
2788 cma_deref_id(id_priv);
2789 rdma_destroy_id(&id_priv->id);
2793 mutex_unlock(&id_priv->handler_mutex);
2794 cma_deref_id(id_priv);
2797 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2799 struct cma_work *work;
2803 work = kzalloc(sizeof *work, GFP_KERNEL);
2807 if (!id_priv->cma_dev) {
2808 ret = cma_bind_loopback(id_priv);
2813 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2814 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2817 INIT_WORK(&work->work, cma_work_handler);
2818 work->old_state = RDMA_CM_ADDR_QUERY;
2819 work->new_state = RDMA_CM_ADDR_RESOLVED;
2820 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2821 queue_work(cma_wq, &work->work);
2828 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2830 struct cma_work *work;
2833 work = kzalloc(sizeof *work, GFP_KERNEL);
2837 if (!id_priv->cma_dev) {
2838 ret = cma_resolve_ib_dev(id_priv);
2843 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2844 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2847 INIT_WORK(&work->work, cma_work_handler);
2848 work->old_state = RDMA_CM_ADDR_QUERY;
2849 work->new_state = RDMA_CM_ADDR_RESOLVED;
2850 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2851 queue_work(cma_wq, &work->work);
2858 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2859 struct sockaddr *dst_addr)
2861 if (!src_addr || !src_addr->sa_family) {
2862 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2863 src_addr->sa_family = dst_addr->sa_family;
2864 if (IS_ENABLED(CONFIG_IPV6) &&
2865 dst_addr->sa_family == AF_INET6) {
2866 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2867 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2868 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2869 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2870 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2871 } else if (dst_addr->sa_family == AF_IB) {
2872 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2873 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2876 return rdma_bind_addr(id, src_addr);
2879 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2880 struct sockaddr *dst_addr, int timeout_ms)
2882 struct rdma_id_private *id_priv;
2885 id_priv = container_of(id, struct rdma_id_private, id);
2886 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2887 if (id_priv->state == RDMA_CM_IDLE) {
2888 ret = cma_bind_addr(id, src_addr, dst_addr);
2890 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2895 if (cma_family(id_priv) != dst_addr->sa_family) {
2896 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2900 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) {
2901 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
2905 atomic_inc(&id_priv->refcount);
2906 if (cma_any_addr(dst_addr)) {
2907 ret = cma_resolve_loopback(id_priv);
2909 if (dst_addr->sa_family == AF_IB) {
2910 ret = cma_resolve_ib_addr(id_priv);
2912 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2913 dst_addr, &id->route.addr.dev_addr,
2914 timeout_ms, addr_handler, id_priv);
2922 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2923 cma_deref_id(id_priv);
2926 EXPORT_SYMBOL(rdma_resolve_addr);
2928 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2930 struct rdma_id_private *id_priv;
2931 unsigned long flags;
2934 id_priv = container_of(id, struct rdma_id_private, id);
2935 spin_lock_irqsave(&id_priv->lock, flags);
2936 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2937 id_priv->reuseaddr = reuse;
2942 spin_unlock_irqrestore(&id_priv->lock, flags);
2945 EXPORT_SYMBOL(rdma_set_reuseaddr);
2947 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2949 struct rdma_id_private *id_priv;
2950 unsigned long flags;
2953 id_priv = container_of(id, struct rdma_id_private, id);
2954 spin_lock_irqsave(&id_priv->lock, flags);
2955 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2956 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2957 id_priv->afonly = afonly;
2962 spin_unlock_irqrestore(&id_priv->lock, flags);
2965 EXPORT_SYMBOL(rdma_set_afonly);
2967 static void cma_bind_port(struct rdma_bind_list *bind_list,
2968 struct rdma_id_private *id_priv)
2970 struct sockaddr *addr;
2971 struct sockaddr_ib *sib;
2975 addr = cma_src_addr(id_priv);
2976 port = htons(bind_list->port);
2978 switch (addr->sa_family) {
2980 ((struct sockaddr_in *) addr)->sin_port = port;
2983 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2986 sib = (struct sockaddr_ib *) addr;
2987 sid = be64_to_cpu(sib->sib_sid);
2988 mask = be64_to_cpu(sib->sib_sid_mask);
2989 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2990 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2993 id_priv->bind_list = bind_list;
2994 hlist_add_head(&id_priv->node, &bind_list->owners);
2997 static int cma_alloc_port(enum rdma_port_space ps,
2998 struct rdma_id_private *id_priv, unsigned short snum)
3000 struct rdma_bind_list *bind_list;
3003 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
3007 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3013 bind_list->port = (unsigned short)ret;
3014 cma_bind_port(bind_list, id_priv);
3018 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
3021 static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3022 struct rdma_id_private *id_priv)
3024 struct rdma_id_private *cur_id;
3025 struct sockaddr *daddr = cma_dst_addr(id_priv);
3026 struct sockaddr *saddr = cma_src_addr(id_priv);
3027 __be16 dport = cma_port(daddr);
3029 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3030 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3031 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3032 __be16 cur_dport = cma_port(cur_daddr);
3034 if (id_priv == cur_id)
3037 /* different dest port -> unique */
3038 if (!cma_any_port(cur_daddr) &&
3039 (dport != cur_dport))
3042 /* different src address -> unique */
3043 if (!cma_any_addr(saddr) &&
3044 !cma_any_addr(cur_saddr) &&
3045 cma_addr_cmp(saddr, cur_saddr))
3048 /* different dst address -> unique */
3049 if (!cma_any_addr(cur_daddr) &&
3050 cma_addr_cmp(daddr, cur_daddr))
3053 return -EADDRNOTAVAIL;
3058 static int cma_alloc_any_port(enum rdma_port_space ps,
3059 struct rdma_id_private *id_priv)
3061 static unsigned int last_used_port;
3062 int low, high, remaining;
3064 struct net *net = id_priv->id.route.addr.dev_addr.net;
3066 inet_get_local_port_range(net, &low, &high);
3067 remaining = (high - low) + 1;
3068 rover = prandom_u32() % remaining + low;
3070 if (last_used_port != rover) {
3071 struct rdma_bind_list *bind_list;
3074 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3077 ret = cma_alloc_port(ps, id_priv, rover);
3079 ret = cma_port_is_unique(bind_list, id_priv);
3081 cma_bind_port(bind_list, id_priv);
3084 * Remember previously used port number in order to avoid
3085 * re-using same port immediately after it is closed.
3088 last_used_port = rover;
3089 if (ret != -EADDRNOTAVAIL)
3094 if ((rover < low) || (rover > high))
3098 return -EADDRNOTAVAIL;
3102 * Check that the requested port is available. This is called when trying to
3103 * bind to a specific port, or when trying to listen on a bound port. In
3104 * the latter case, the provided id_priv may already be on the bind_list, but
3105 * we still need to check that it's okay to start listening.
3107 static int cma_check_port(struct rdma_bind_list *bind_list,
3108 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3110 struct rdma_id_private *cur_id;
3111 struct sockaddr *addr, *cur_addr;
3113 addr = cma_src_addr(id_priv);
3114 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3115 if (id_priv == cur_id)
3118 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3122 cur_addr = cma_src_addr(cur_id);
3123 if (id_priv->afonly && cur_id->afonly &&
3124 (addr->sa_family != cur_addr->sa_family))
3127 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3128 return -EADDRNOTAVAIL;
3130 if (!cma_addr_cmp(addr, cur_addr))
3136 static int cma_use_port(enum rdma_port_space ps,
3137 struct rdma_id_private *id_priv)
3139 struct rdma_bind_list *bind_list;
3140 unsigned short snum;
3143 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3144 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3147 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3149 ret = cma_alloc_port(ps, id_priv, snum);
3151 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3153 cma_bind_port(bind_list, id_priv);
3158 static int cma_bind_listen(struct rdma_id_private *id_priv)
3160 struct rdma_bind_list *bind_list = id_priv->bind_list;
3164 if (bind_list->owners.first->next)
3165 ret = cma_check_port(bind_list, id_priv, 0);
3166 mutex_unlock(&lock);
3170 static enum rdma_port_space cma_select_inet_ps(
3171 struct rdma_id_private *id_priv)
3173 switch (id_priv->id.ps) {
3178 return id_priv->id.ps;
3185 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3187 enum rdma_port_space ps = 0;
3188 struct sockaddr_ib *sib;
3189 u64 sid_ps, mask, sid;
3191 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3192 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3193 sid = be64_to_cpu(sib->sib_sid) & mask;
3195 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3196 sid_ps = RDMA_IB_IP_PS_IB;
3198 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3199 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3200 sid_ps = RDMA_IB_IP_PS_TCP;
3202 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3203 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3204 sid_ps = RDMA_IB_IP_PS_UDP;
3209 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3210 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3211 be64_to_cpu(sib->sib_sid_mask));
3216 static int cma_get_port(struct rdma_id_private *id_priv)
3218 enum rdma_port_space ps;
3221 if (cma_family(id_priv) != AF_IB)
3222 ps = cma_select_inet_ps(id_priv);
3224 ps = cma_select_ib_ps(id_priv);
3226 return -EPROTONOSUPPORT;
3229 if (cma_any_port(cma_src_addr(id_priv)))
3230 ret = cma_alloc_any_port(ps, id_priv);
3232 ret = cma_use_port(ps, id_priv);
3233 mutex_unlock(&lock);
3238 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3239 struct sockaddr *addr)
3241 #if IS_ENABLED(CONFIG_IPV6)
3242 struct sockaddr_in6 *sin6;
3244 if (addr->sa_family != AF_INET6)
3247 sin6 = (struct sockaddr_in6 *) addr;
3249 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3252 if (!sin6->sin6_scope_id)
3255 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3260 int rdma_listen(struct rdma_cm_id *id, int backlog)
3262 struct rdma_id_private *id_priv;
3265 id_priv = container_of(id, struct rdma_id_private, id);
3266 if (id_priv->state == RDMA_CM_IDLE) {
3267 id->route.addr.src_addr.ss_family = AF_INET;
3268 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3273 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3276 if (id_priv->reuseaddr) {
3277 ret = cma_bind_listen(id_priv);
3282 id_priv->backlog = backlog;
3284 if (rdma_cap_ib_cm(id->device, 1)) {
3285 ret = cma_ib_listen(id_priv);
3288 } else if (rdma_cap_iw_cm(id->device, 1)) {
3289 ret = cma_iw_listen(id_priv, backlog);
3297 cma_listen_on_all(id_priv);
3301 id_priv->backlog = 0;
3302 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3305 EXPORT_SYMBOL(rdma_listen);
3307 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3309 struct rdma_id_private *id_priv;
3311 struct sockaddr *daddr;
3313 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3314 addr->sa_family != AF_IB)
3315 return -EAFNOSUPPORT;
3317 id_priv = container_of(id, struct rdma_id_private, id);
3318 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3321 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3325 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3326 if (!cma_any_addr(addr)) {
3327 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3331 ret = cma_acquire_dev(id_priv, NULL);
3336 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3337 if (addr->sa_family == AF_INET)
3338 id_priv->afonly = 1;
3339 #if IS_ENABLED(CONFIG_IPV6)
3340 else if (addr->sa_family == AF_INET6) {
3341 struct net *net = id_priv->id.route.addr.dev_addr.net;
3343 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3347 ret = cma_get_port(id_priv);
3351 daddr = cma_dst_addr(id_priv);
3352 daddr->sa_family = addr->sa_family;
3356 if (id_priv->cma_dev)
3357 cma_release_dev(id_priv);
3359 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3362 EXPORT_SYMBOL(rdma_bind_addr);
3364 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3366 struct cma_hdr *cma_hdr;
3369 cma_hdr->cma_version = CMA_VERSION;
3370 if (cma_family(id_priv) == AF_INET) {
3371 struct sockaddr_in *src4, *dst4;
3373 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3374 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3376 cma_set_ip_ver(cma_hdr, 4);
3377 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3378 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3379 cma_hdr->port = src4->sin_port;
3380 } else if (cma_family(id_priv) == AF_INET6) {
3381 struct sockaddr_in6 *src6, *dst6;
3383 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3384 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3386 cma_set_ip_ver(cma_hdr, 6);
3387 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3388 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3389 cma_hdr->port = src6->sin6_port;
3394 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3395 struct ib_cm_event *ib_event)
3397 struct rdma_id_private *id_priv = cm_id->context;
3398 struct rdma_cm_event event;
3399 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3402 mutex_lock(&id_priv->handler_mutex);
3403 if (id_priv->state != RDMA_CM_CONNECT)
3406 memset(&event, 0, sizeof event);
3407 switch (ib_event->event) {
3408 case IB_CM_SIDR_REQ_ERROR:
3409 event.event = RDMA_CM_EVENT_UNREACHABLE;
3410 event.status = -ETIMEDOUT;
3412 case IB_CM_SIDR_REP_RECEIVED:
3413 event.param.ud.private_data = ib_event->private_data;
3414 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3415 if (rep->status != IB_SIDR_SUCCESS) {
3416 event.event = RDMA_CM_EVENT_UNREACHABLE;
3417 event.status = ib_event->param.sidr_rep_rcvd.status;
3418 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3422 ret = cma_set_qkey(id_priv, rep->qkey);
3424 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3425 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3429 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3430 id_priv->id.route.path_rec,
3431 &event.param.ud.ah_attr);
3432 event.param.ud.qp_num = rep->qpn;
3433 event.param.ud.qkey = rep->qkey;
3434 event.event = RDMA_CM_EVENT_ESTABLISHED;
3438 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3443 ret = id_priv->id.event_handler(&id_priv->id, &event);
3445 /* Destroy the CM ID by returning a non-zero value. */
3446 id_priv->cm_id.ib = NULL;
3447 cma_exch(id_priv, RDMA_CM_DESTROYING);
3448 mutex_unlock(&id_priv->handler_mutex);
3449 rdma_destroy_id(&id_priv->id);
3453 mutex_unlock(&id_priv->handler_mutex);
3457 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3458 struct rdma_conn_param *conn_param)
3460 struct ib_cm_sidr_req_param req;
3461 struct ib_cm_id *id;
3465 memset(&req, 0, sizeof req);
3466 offset = cma_user_data_offset(id_priv);
3467 req.private_data_len = offset + conn_param->private_data_len;
3468 if (req.private_data_len < conn_param->private_data_len)
3471 if (req.private_data_len) {
3472 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3476 private_data = NULL;
3479 if (conn_param->private_data && conn_param->private_data_len)
3480 memcpy(private_data + offset, conn_param->private_data,
3481 conn_param->private_data_len);
3484 ret = cma_format_hdr(private_data, id_priv);
3487 req.private_data = private_data;
3490 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3496 id_priv->cm_id.ib = id;
3498 req.path = id_priv->id.route.path_rec;
3499 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3500 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3501 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3503 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3505 ib_destroy_cm_id(id_priv->cm_id.ib);
3506 id_priv->cm_id.ib = NULL;
3509 kfree(private_data);
3513 static int cma_connect_ib(struct rdma_id_private *id_priv,
3514 struct rdma_conn_param *conn_param)
3516 struct ib_cm_req_param req;
3517 struct rdma_route *route;
3519 struct ib_cm_id *id;
3522 memset(&req, 0, sizeof req);
3523 offset = cma_user_data_offset(id_priv);
3524 req.private_data_len = offset + conn_param->private_data_len;
3525 if (req.private_data_len < conn_param->private_data_len)
3528 if (req.private_data_len) {
3529 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3533 private_data = NULL;
3536 if (conn_param->private_data && conn_param->private_data_len)
3537 memcpy(private_data + offset, conn_param->private_data,
3538 conn_param->private_data_len);
3540 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3545 id_priv->cm_id.ib = id;
3547 route = &id_priv->id.route;
3549 ret = cma_format_hdr(private_data, id_priv);
3552 req.private_data = private_data;
3555 req.primary_path = &route->path_rec[0];
3556 if (route->num_paths == 2)
3557 req.alternate_path = &route->path_rec[1];
3559 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3560 req.qp_num = id_priv->qp_num;
3561 req.qp_type = id_priv->id.qp_type;
3562 req.starting_psn = id_priv->seq_num;
3563 req.responder_resources = conn_param->responder_resources;
3564 req.initiator_depth = conn_param->initiator_depth;
3565 req.flow_control = conn_param->flow_control;
3566 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3567 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3568 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3569 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3570 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3571 req.srq = id_priv->srq ? 1 : 0;
3573 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3575 if (ret && !IS_ERR(id)) {
3576 ib_destroy_cm_id(id);
3577 id_priv->cm_id.ib = NULL;
3580 kfree(private_data);
3584 static int cma_connect_iw(struct rdma_id_private *id_priv,
3585 struct rdma_conn_param *conn_param)
3587 struct iw_cm_id *cm_id;
3589 struct iw_cm_conn_param iw_param;
3591 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3593 return PTR_ERR(cm_id);
3595 cm_id->tos = id_priv->tos;
3596 id_priv->cm_id.iw = cm_id;
3598 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3599 rdma_addr_size(cma_src_addr(id_priv)));
3600 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3601 rdma_addr_size(cma_dst_addr(id_priv)));
3603 ret = cma_modify_qp_rtr(id_priv, conn_param);
3608 iw_param.ord = conn_param->initiator_depth;
3609 iw_param.ird = conn_param->responder_resources;
3610 iw_param.private_data = conn_param->private_data;
3611 iw_param.private_data_len = conn_param->private_data_len;
3612 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3614 memset(&iw_param, 0, sizeof iw_param);
3615 iw_param.qpn = id_priv->qp_num;
3617 ret = iw_cm_connect(cm_id, &iw_param);
3620 iw_destroy_cm_id(cm_id);
3621 id_priv->cm_id.iw = NULL;
3626 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3628 struct rdma_id_private *id_priv;
3631 id_priv = container_of(id, struct rdma_id_private, id);
3632 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3636 id_priv->qp_num = conn_param->qp_num;
3637 id_priv->srq = conn_param->srq;
3640 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3641 if (id->qp_type == IB_QPT_UD)
3642 ret = cma_resolve_ib_udp(id_priv, conn_param);
3644 ret = cma_connect_ib(id_priv, conn_param);
3645 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3646 ret = cma_connect_iw(id_priv, conn_param);
3654 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3657 EXPORT_SYMBOL(rdma_connect);
3659 static int cma_accept_ib(struct rdma_id_private *id_priv,
3660 struct rdma_conn_param *conn_param)
3662 struct ib_cm_rep_param rep;
3665 ret = cma_modify_qp_rtr(id_priv, conn_param);
3669 ret = cma_modify_qp_rts(id_priv, conn_param);
3673 memset(&rep, 0, sizeof rep);
3674 rep.qp_num = id_priv->qp_num;
3675 rep.starting_psn = id_priv->seq_num;
3676 rep.private_data = conn_param->private_data;
3677 rep.private_data_len = conn_param->private_data_len;
3678 rep.responder_resources = conn_param->responder_resources;
3679 rep.initiator_depth = conn_param->initiator_depth;
3680 rep.failover_accepted = 0;
3681 rep.flow_control = conn_param->flow_control;
3682 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3683 rep.srq = id_priv->srq ? 1 : 0;
3685 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3690 static int cma_accept_iw(struct rdma_id_private *id_priv,
3691 struct rdma_conn_param *conn_param)
3693 struct iw_cm_conn_param iw_param;
3699 ret = cma_modify_qp_rtr(id_priv, conn_param);
3703 iw_param.ord = conn_param->initiator_depth;
3704 iw_param.ird = conn_param->responder_resources;
3705 iw_param.private_data = conn_param->private_data;
3706 iw_param.private_data_len = conn_param->private_data_len;
3707 if (id_priv->id.qp) {
3708 iw_param.qpn = id_priv->qp_num;
3710 iw_param.qpn = conn_param->qp_num;
3712 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3715 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3716 enum ib_cm_sidr_status status, u32 qkey,
3717 const void *private_data, int private_data_len)
3719 struct ib_cm_sidr_rep_param rep;
3722 memset(&rep, 0, sizeof rep);
3723 rep.status = status;
3724 if (status == IB_SIDR_SUCCESS) {
3725 ret = cma_set_qkey(id_priv, qkey);
3728 rep.qp_num = id_priv->qp_num;
3729 rep.qkey = id_priv->qkey;
3731 rep.private_data = private_data;
3732 rep.private_data_len = private_data_len;
3734 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3737 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3739 struct rdma_id_private *id_priv;
3742 id_priv = container_of(id, struct rdma_id_private, id);
3744 id_priv->owner = task_pid_nr(current);
3746 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3749 if (!id->qp && conn_param) {
3750 id_priv->qp_num = conn_param->qp_num;
3751 id_priv->srq = conn_param->srq;
3754 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3755 if (id->qp_type == IB_QPT_UD) {
3757 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3759 conn_param->private_data,
3760 conn_param->private_data_len);
3762 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3766 ret = cma_accept_ib(id_priv, conn_param);
3768 ret = cma_rep_recv(id_priv);
3770 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3771 ret = cma_accept_iw(id_priv, conn_param);
3780 cma_modify_qp_err(id_priv);
3781 rdma_reject(id, NULL, 0);
3784 EXPORT_SYMBOL(rdma_accept);
3786 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3788 struct rdma_id_private *id_priv;
3791 id_priv = container_of(id, struct rdma_id_private, id);
3792 if (!id_priv->cm_id.ib)
3795 switch (id->device->node_type) {
3796 case RDMA_NODE_IB_CA:
3797 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3805 EXPORT_SYMBOL(rdma_notify);
3807 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3808 u8 private_data_len)
3810 struct rdma_id_private *id_priv;
3813 id_priv = container_of(id, struct rdma_id_private, id);
3814 if (!id_priv->cm_id.ib)
3817 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3818 if (id->qp_type == IB_QPT_UD)
3819 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3820 private_data, private_data_len);
3822 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3823 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3824 0, private_data, private_data_len);
3825 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3826 ret = iw_cm_reject(id_priv->cm_id.iw,
3827 private_data, private_data_len);
3833 EXPORT_SYMBOL(rdma_reject);
3835 int rdma_disconnect(struct rdma_cm_id *id)
3837 struct rdma_id_private *id_priv;
3840 id_priv = container_of(id, struct rdma_id_private, id);
3841 if (!id_priv->cm_id.ib)
3844 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3845 ret = cma_modify_qp_err(id_priv);
3848 /* Initiate or respond to a disconnect. */
3849 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3850 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3851 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3852 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3859 EXPORT_SYMBOL(rdma_disconnect);
3861 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3863 struct rdma_id_private *id_priv;
3864 struct cma_multicast *mc = multicast->context;
3865 struct rdma_cm_event event;
3868 id_priv = mc->id_priv;
3869 mutex_lock(&id_priv->handler_mutex);
3870 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3871 id_priv->state != RDMA_CM_ADDR_RESOLVED)
3875 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3877 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
3879 mutex_lock(&id_priv->qp_mutex);
3880 if (!status && id_priv->id.qp) {
3881 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3882 be16_to_cpu(multicast->rec.mlid));
3884 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
3887 mutex_unlock(&id_priv->qp_mutex);
3889 memset(&event, 0, sizeof event);
3890 event.status = status;
3891 event.param.ud.private_data = mc->context;
3893 struct rdma_dev_addr *dev_addr =
3894 &id_priv->id.route.addr.dev_addr;
3895 struct net_device *ndev =
3896 dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3897 enum ib_gid_type gid_type =
3898 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3899 rdma_start_port(id_priv->cma_dev->device)];
3901 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3902 ib_init_ah_from_mcmember(id_priv->id.device,
3903 id_priv->id.port_num, &multicast->rec,
3905 &event.param.ud.ah_attr);
3906 event.param.ud.qp_num = 0xFFFFFF;
3907 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3911 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3913 ret = id_priv->id.event_handler(&id_priv->id, &event);
3915 cma_exch(id_priv, RDMA_CM_DESTROYING);
3916 mutex_unlock(&id_priv->handler_mutex);
3917 rdma_destroy_id(&id_priv->id);
3922 mutex_unlock(&id_priv->handler_mutex);
3926 static void cma_set_mgid(struct rdma_id_private *id_priv,
3927 struct sockaddr *addr, union ib_gid *mgid)
3929 unsigned char mc_map[MAX_ADDR_LEN];
3930 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3931 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3932 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3934 if (cma_any_addr(addr)) {
3935 memset(mgid, 0, sizeof *mgid);
3936 } else if ((addr->sa_family == AF_INET6) &&
3937 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3939 /* IPv6 address is an SA assigned MGID. */
3940 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3941 } else if (addr->sa_family == AF_IB) {
3942 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3943 } else if ((addr->sa_family == AF_INET6)) {
3944 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3945 if (id_priv->id.ps == RDMA_PS_UDP)
3946 mc_map[7] = 0x01; /* Use RDMA CM signature */
3947 *mgid = *(union ib_gid *) (mc_map + 4);
3949 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3950 if (id_priv->id.ps == RDMA_PS_UDP)
3951 mc_map[7] = 0x01; /* Use RDMA CM signature */
3952 *mgid = *(union ib_gid *) (mc_map + 4);
3956 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3957 struct cma_multicast *mc)
3959 struct ib_sa_mcmember_rec rec;
3960 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3961 ib_sa_comp_mask comp_mask;
3964 ib_addr_get_mgid(dev_addr, &rec.mgid);
3965 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3970 ret = cma_set_qkey(id_priv, 0);
3974 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3975 rec.qkey = cpu_to_be32(id_priv->qkey);
3976 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3977 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3978 rec.join_state = mc->join_state;
3980 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
3981 (!ib_sa_sendonly_fullmem_support(&sa_client,
3983 id_priv->id.port_num))) {
3984 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
3985 "RDMA CM: SM doesn't support Send Only Full Member option\n",
3986 id_priv->id.device->name, id_priv->id.port_num);
3990 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3991 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3992 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3993 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3994 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3996 if (id_priv->id.ps == RDMA_PS_IPOIB)
3997 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3998 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3999 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4000 IB_SA_MCMEMBER_REC_MTU |
4001 IB_SA_MCMEMBER_REC_HOP_LIMIT;
4003 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4004 id_priv->id.port_num, &rec,
4005 comp_mask, GFP_KERNEL,
4006 cma_ib_mc_handler, mc);
4007 return PTR_ERR_OR_ZERO(mc->multicast.ib);
4010 static void iboe_mcast_work_handler(struct work_struct *work)
4012 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4013 struct cma_multicast *mc = mw->mc;
4014 struct ib_sa_multicast *m = mc->multicast.ib;
4016 mc->multicast.ib->context = mc;
4017 cma_ib_mc_handler(0, m);
4018 kref_put(&mc->mcref, release_mc);
4022 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
4024 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4025 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4027 if (cma_any_addr(addr)) {
4028 memset(mgid, 0, sizeof *mgid);
4029 } else if (addr->sa_family == AF_INET6) {
4030 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4032 mgid->raw[0] = 0xff;
4033 mgid->raw[1] = 0x0e;
4042 mgid->raw[10] = 0xff;
4043 mgid->raw[11] = 0xff;
4044 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4048 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4049 struct cma_multicast *mc)
4051 struct iboe_mcast_work *work;
4052 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4054 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4055 struct net_device *ndev = NULL;
4056 enum ib_gid_type gid_type;
4059 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4061 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4064 work = kzalloc(sizeof *work, GFP_KERNEL);
4068 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4069 if (!mc->multicast.ib) {
4074 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
4076 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4077 if (id_priv->id.ps == RDMA_PS_UDP)
4078 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4080 if (dev_addr->bound_dev_if)
4081 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
4086 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4087 mc->multicast.ib->rec.hop_limit = 1;
4088 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4090 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4091 rdma_start_port(id_priv->cma_dev->device)];
4092 if (addr->sa_family == AF_INET) {
4093 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4094 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4096 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4099 mc->igmp_joined = true;
4103 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4107 if (err || !mc->multicast.ib->rec.mtu) {
4112 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4113 &mc->multicast.ib->rec.port_gid);
4116 INIT_WORK(&work->work, iboe_mcast_work_handler);
4117 kref_get(&mc->mcref);
4118 queue_work(cma_wq, &work->work);
4123 kfree(mc->multicast.ib);
4129 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4130 u8 join_state, void *context)
4132 struct rdma_id_private *id_priv;
4133 struct cma_multicast *mc;
4136 id_priv = container_of(id, struct rdma_id_private, id);
4137 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4138 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4141 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4145 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4146 mc->context = context;
4147 mc->id_priv = id_priv;
4148 mc->igmp_joined = false;
4149 mc->join_state = join_state;
4150 spin_lock(&id_priv->lock);
4151 list_add(&mc->list, &id_priv->mc_list);
4152 spin_unlock(&id_priv->lock);
4154 if (rdma_protocol_roce(id->device, id->port_num)) {
4155 kref_init(&mc->mcref);
4156 ret = cma_iboe_join_multicast(id_priv, mc);
4157 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4158 ret = cma_join_ib_multicast(id_priv, mc);
4163 spin_lock_irq(&id_priv->lock);
4164 list_del(&mc->list);
4165 spin_unlock_irq(&id_priv->lock);
4170 EXPORT_SYMBOL(rdma_join_multicast);
4172 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4174 struct rdma_id_private *id_priv;
4175 struct cma_multicast *mc;
4177 id_priv = container_of(id, struct rdma_id_private, id);
4178 spin_lock_irq(&id_priv->lock);
4179 list_for_each_entry(mc, &id_priv->mc_list, list) {
4180 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4181 list_del(&mc->list);
4182 spin_unlock_irq(&id_priv->lock);
4185 ib_detach_mcast(id->qp,
4186 &mc->multicast.ib->rec.mgid,
4187 be16_to_cpu(mc->multicast.ib->rec.mlid));
4189 BUG_ON(id_priv->cma_dev->device != id->device);
4191 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4192 ib_sa_free_multicast(mc->multicast.ib);
4194 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4195 if (mc->igmp_joined) {
4196 struct rdma_dev_addr *dev_addr =
4197 &id->route.addr.dev_addr;
4198 struct net_device *ndev = NULL;
4200 if (dev_addr->bound_dev_if)
4201 ndev = dev_get_by_index(&init_net,
4202 dev_addr->bound_dev_if);
4205 &mc->multicast.ib->rec.mgid,
4209 mc->igmp_joined = false;
4211 kref_put(&mc->mcref, release_mc);
4216 spin_unlock_irq(&id_priv->lock);
4218 EXPORT_SYMBOL(rdma_leave_multicast);
4220 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4222 struct rdma_dev_addr *dev_addr;
4223 struct cma_ndev_work *work;
4225 dev_addr = &id_priv->id.route.addr.dev_addr;
4227 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4228 (net_eq(dev_net(ndev), dev_addr->net)) &&
4229 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4230 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4231 ndev->name, &id_priv->id);
4232 work = kzalloc(sizeof *work, GFP_KERNEL);
4236 INIT_WORK(&work->work, cma_ndev_work_handler);
4238 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4239 atomic_inc(&id_priv->refcount);
4240 queue_work(cma_wq, &work->work);
4246 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4249 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4250 struct cma_device *cma_dev;
4251 struct rdma_id_private *id_priv;
4252 int ret = NOTIFY_DONE;
4254 if (event != NETDEV_BONDING_FAILOVER)
4257 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
4261 list_for_each_entry(cma_dev, &dev_list, list)
4262 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4263 ret = cma_netdev_change(ndev, id_priv);
4269 mutex_unlock(&lock);
4273 static struct notifier_block cma_nb = {
4274 .notifier_call = cma_netdev_callback
4277 static void cma_add_one(struct ib_device *device)
4279 struct cma_device *cma_dev;
4280 struct rdma_id_private *id_priv;
4282 unsigned long supported_gids = 0;
4284 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4288 cma_dev->device = device;
4289 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4290 sizeof(*cma_dev->default_gid_type),
4292 if (!cma_dev->default_gid_type)
4295 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4296 sizeof(*cma_dev->default_roce_tos),
4298 if (!cma_dev->default_roce_tos)
4301 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4302 supported_gids = roce_gid_type_mask_support(device, i);
4303 WARN_ON(!supported_gids);
4304 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4305 find_first_bit(&supported_gids, BITS_PER_LONG);
4306 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4309 init_completion(&cma_dev->comp);
4310 atomic_set(&cma_dev->refcount, 1);
4311 INIT_LIST_HEAD(&cma_dev->id_list);
4312 ib_set_client_data(device, &cma_client, cma_dev);
4315 list_add_tail(&cma_dev->list, &dev_list);
4316 list_for_each_entry(id_priv, &listen_any_list, list)
4317 cma_listen_on_dev(id_priv, cma_dev);
4318 mutex_unlock(&lock);
4323 kfree(cma_dev->default_gid_type);
4331 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4333 struct rdma_cm_event event;
4334 enum rdma_cm_state state;
4337 /* Record that we want to remove the device */
4338 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4339 if (state == RDMA_CM_DESTROYING)
4342 cma_cancel_operation(id_priv, state);
4343 mutex_lock(&id_priv->handler_mutex);
4345 /* Check for destruction from another callback. */
4346 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4349 memset(&event, 0, sizeof event);
4350 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4351 ret = id_priv->id.event_handler(&id_priv->id, &event);
4353 mutex_unlock(&id_priv->handler_mutex);
4357 static void cma_process_remove(struct cma_device *cma_dev)
4359 struct rdma_id_private *id_priv;
4363 while (!list_empty(&cma_dev->id_list)) {
4364 id_priv = list_entry(cma_dev->id_list.next,
4365 struct rdma_id_private, list);
4367 list_del(&id_priv->listen_list);
4368 list_del_init(&id_priv->list);
4369 atomic_inc(&id_priv->refcount);
4370 mutex_unlock(&lock);
4372 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4373 cma_deref_id(id_priv);
4375 rdma_destroy_id(&id_priv->id);
4379 mutex_unlock(&lock);
4381 cma_deref_dev(cma_dev);
4382 wait_for_completion(&cma_dev->comp);
4385 static void cma_remove_one(struct ib_device *device, void *client_data)
4387 struct cma_device *cma_dev = client_data;
4393 list_del(&cma_dev->list);
4394 mutex_unlock(&lock);
4396 cma_process_remove(cma_dev);
4397 kfree(cma_dev->default_roce_tos);
4398 kfree(cma_dev->default_gid_type);
4402 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4404 struct nlmsghdr *nlh;
4405 struct rdma_cm_id_stats *id_stats;
4406 struct rdma_id_private *id_priv;
4407 struct rdma_cm_id *id = NULL;
4408 struct cma_device *cma_dev;
4409 int i_dev = 0, i_id = 0;
4412 * We export all of the IDs as a sequence of messages. Each
4413 * ID gets its own netlink message.
4417 list_for_each_entry(cma_dev, &dev_list, list) {
4418 if (i_dev < cb->args[0]) {
4424 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4425 if (i_id < cb->args[1]) {
4430 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4431 sizeof *id_stats, RDMA_NL_RDMA_CM,
4432 RDMA_NL_RDMA_CM_ID_STATS,
4437 memset(id_stats, 0, sizeof *id_stats);
4439 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4440 id_stats->port_num = id->port_num;
4441 id_stats->bound_dev_if =
4442 id->route.addr.dev_addr.bound_dev_if;
4444 if (ibnl_put_attr(skb, nlh,
4445 rdma_addr_size(cma_src_addr(id_priv)),
4446 cma_src_addr(id_priv),
4447 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4449 if (ibnl_put_attr(skb, nlh,
4450 rdma_addr_size(cma_src_addr(id_priv)),
4451 cma_dst_addr(id_priv),
4452 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4455 id_stats->pid = id_priv->owner;
4456 id_stats->port_space = id->ps;
4457 id_stats->cm_state = id_priv->state;
4458 id_stats->qp_num = id_priv->qp_num;
4459 id_stats->qp_type = id->qp_type;
4469 mutex_unlock(&lock);
4470 cb->args[0] = i_dev;
4476 static const struct ibnl_client_cbs cma_cb_table[] = {
4477 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
4478 .module = THIS_MODULE },
4481 static int cma_init_net(struct net *net)
4483 struct cma_pernet *pernet = cma_pernet(net);
4485 idr_init(&pernet->tcp_ps);
4486 idr_init(&pernet->udp_ps);
4487 idr_init(&pernet->ipoib_ps);
4488 idr_init(&pernet->ib_ps);
4493 static void cma_exit_net(struct net *net)
4495 struct cma_pernet *pernet = cma_pernet(net);
4497 idr_destroy(&pernet->tcp_ps);
4498 idr_destroy(&pernet->udp_ps);
4499 idr_destroy(&pernet->ipoib_ps);
4500 idr_destroy(&pernet->ib_ps);
4503 static struct pernet_operations cma_pernet_operations = {
4504 .init = cma_init_net,
4505 .exit = cma_exit_net,
4506 .id = &cma_pernet_id,
4507 .size = sizeof(struct cma_pernet),
4510 static int __init cma_init(void)
4514 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4518 ret = register_pernet_subsys(&cma_pernet_operations);
4522 ib_sa_register_client(&sa_client);
4523 rdma_addr_register_client(&addr_client);
4524 register_netdevice_notifier(&cma_nb);
4526 ret = ib_register_client(&cma_client);
4530 if (ibnl_add_client(RDMA_NL_RDMA_CM, ARRAY_SIZE(cma_cb_table),
4532 pr_warn("RDMA CMA: failed to add netlink callback\n");
4533 cma_configfs_init();
4538 unregister_netdevice_notifier(&cma_nb);
4539 rdma_addr_unregister_client(&addr_client);
4540 ib_sa_unregister_client(&sa_client);
4542 destroy_workqueue(cma_wq);
4546 static void __exit cma_cleanup(void)
4548 cma_configfs_exit();
4549 ibnl_remove_client(RDMA_NL_RDMA_CM);
4550 ib_unregister_client(&cma_client);
4551 unregister_netdevice_notifier(&cma_nb);
4552 rdma_addr_unregister_client(&addr_client);
4553 ib_sa_unregister_client(&sa_client);
4554 unregister_pernet_subsys(&cma_pernet_operations);
4555 destroy_workqueue(cma_wq);
4558 module_init(cma_init);
4559 module_exit(cma_cleanup);