2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/completion.h>
38 #include <linux/in6.h>
39 #include <linux/mutex.h>
40 #include <linux/random.h>
41 #include <linux/idr.h>
42 #include <linux/inetdevice.h>
43 #include <linux/slab.h>
44 #include <linux/module.h>
45 #include <net/route.h>
47 #include <net/net_namespace.h>
48 #include <net/netns/generic.h>
51 #include <net/ip_fib.h>
52 #include <net/ip6_route.h>
54 #include <rdma/rdma_cm.h>
55 #include <rdma/rdma_cm_ib.h>
56 #include <rdma/rdma_netlink.h>
58 #include <rdma/ib_cache.h>
59 #include <rdma/ib_cm.h>
60 #include <rdma/ib_sa.h>
61 #include <rdma/iw_cm.h>
63 MODULE_AUTHOR("Sean Hefty");
64 MODULE_DESCRIPTION("Generic RDMA CM Agent");
65 MODULE_LICENSE("Dual BSD/GPL");
67 #define CMA_CM_RESPONSE_TIMEOUT 20
68 #define CMA_MAX_CM_RETRIES 15
69 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
70 #define CMA_IBOE_PACKET_LIFETIME 18
72 static const char * const cma_events[] = {
73 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
74 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
75 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
76 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
77 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
78 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
79 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
80 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
81 [RDMA_CM_EVENT_REJECTED] = "rejected",
82 [RDMA_CM_EVENT_ESTABLISHED] = "established",
83 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
84 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
85 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
86 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
87 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
88 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
91 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
95 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
96 cma_events[index] : "unrecognized event";
98 EXPORT_SYMBOL(rdma_event_msg);
100 static void cma_add_one(struct ib_device *device);
101 static void cma_remove_one(struct ib_device *device, void *client_data);
103 static struct ib_client cma_client = {
106 .remove = cma_remove_one
109 static struct ib_sa_client sa_client;
110 static struct rdma_addr_client addr_client;
111 static LIST_HEAD(dev_list);
112 static LIST_HEAD(listen_any_list);
113 static DEFINE_MUTEX(lock);
114 static struct workqueue_struct *cma_wq;
115 static int cma_pernet_id;
124 static struct cma_pernet *cma_pernet(struct net *net)
126 return net_generic(net, cma_pernet_id);
129 static struct idr *cma_pernet_idr(struct net *net, enum rdma_port_space ps)
131 struct cma_pernet *pernet = cma_pernet(net);
135 return &pernet->tcp_ps;
137 return &pernet->udp_ps;
139 return &pernet->ipoib_ps;
141 return &pernet->ib_ps;
148 struct list_head list;
149 struct ib_device *device;
150 struct completion comp;
152 struct list_head id_list;
155 struct rdma_bind_list {
156 enum rdma_port_space ps;
157 struct hlist_head owners;
161 static int cma_ps_alloc(struct net *net, enum rdma_port_space ps,
162 struct rdma_bind_list *bind_list, int snum)
164 struct idr *idr = cma_pernet_idr(net, ps);
166 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
169 static struct rdma_bind_list *cma_ps_find(struct net *net,
170 enum rdma_port_space ps, int snum)
172 struct idr *idr = cma_pernet_idr(net, ps);
174 return idr_find(idr, snum);
177 static void cma_ps_remove(struct net *net, enum rdma_port_space ps, int snum)
179 struct idr *idr = cma_pernet_idr(net, ps);
181 idr_remove(idr, snum);
189 * Device removal can occur at anytime, so we need extra handling to
190 * serialize notifying the user of device removal with other callbacks.
191 * We do this by disabling removal notification while a callback is in process,
192 * and reporting it after the callback completes.
194 struct rdma_id_private {
195 struct rdma_cm_id id;
197 struct rdma_bind_list *bind_list;
198 struct hlist_node node;
199 struct list_head list; /* listen_any_list or cma_device.list */
200 struct list_head listen_list; /* per device listens */
201 struct cma_device *cma_dev;
202 struct list_head mc_list;
205 enum rdma_cm_state state;
207 struct mutex qp_mutex;
209 struct completion comp;
211 struct mutex handler_mutex;
215 struct ib_sa_query *query;
233 struct cma_multicast {
234 struct rdma_id_private *id_priv;
236 struct ib_sa_multicast *ib;
238 struct list_head list;
240 struct sockaddr_storage addr;
245 struct work_struct work;
246 struct rdma_id_private *id;
247 enum rdma_cm_state old_state;
248 enum rdma_cm_state new_state;
249 struct rdma_cm_event event;
252 struct cma_ndev_work {
253 struct work_struct work;
254 struct rdma_id_private *id;
255 struct rdma_cm_event event;
258 struct iboe_mcast_work {
259 struct work_struct work;
260 struct rdma_id_private *id;
261 struct cma_multicast *mc;
274 u8 ip_version; /* IP version: 7:4 */
276 union cma_ip_addr src_addr;
277 union cma_ip_addr dst_addr;
280 #define CMA_VERSION 0x00
282 struct cma_req_info {
283 struct ib_device *device;
285 union ib_gid local_gid;
291 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
296 spin_lock_irqsave(&id_priv->lock, flags);
297 ret = (id_priv->state == comp);
298 spin_unlock_irqrestore(&id_priv->lock, flags);
302 static int cma_comp_exch(struct rdma_id_private *id_priv,
303 enum rdma_cm_state comp, enum rdma_cm_state exch)
308 spin_lock_irqsave(&id_priv->lock, flags);
309 if ((ret = (id_priv->state == comp)))
310 id_priv->state = exch;
311 spin_unlock_irqrestore(&id_priv->lock, flags);
315 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
316 enum rdma_cm_state exch)
319 enum rdma_cm_state old;
321 spin_lock_irqsave(&id_priv->lock, flags);
322 old = id_priv->state;
323 id_priv->state = exch;
324 spin_unlock_irqrestore(&id_priv->lock, flags);
328 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
330 return hdr->ip_version >> 4;
333 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
335 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
338 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
339 struct cma_device *cma_dev)
341 atomic_inc(&cma_dev->refcount);
342 id_priv->cma_dev = cma_dev;
343 id_priv->id.device = cma_dev->device;
344 id_priv->id.route.addr.dev_addr.transport =
345 rdma_node_get_transport(cma_dev->device->node_type);
346 list_add_tail(&id_priv->list, &cma_dev->id_list);
349 static inline void cma_deref_dev(struct cma_device *cma_dev)
351 if (atomic_dec_and_test(&cma_dev->refcount))
352 complete(&cma_dev->comp);
355 static inline void release_mc(struct kref *kref)
357 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
359 kfree(mc->multicast.ib);
363 static void cma_release_dev(struct rdma_id_private *id_priv)
366 list_del(&id_priv->list);
367 cma_deref_dev(id_priv->cma_dev);
368 id_priv->cma_dev = NULL;
372 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
374 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
377 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
379 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
382 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
384 return id_priv->id.route.addr.src_addr.ss_family;
387 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
389 struct ib_sa_mcmember_rec rec;
393 if (qkey && id_priv->qkey != qkey)
399 id_priv->qkey = qkey;
403 switch (id_priv->id.ps) {
406 id_priv->qkey = RDMA_UDP_QKEY;
409 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
410 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
411 id_priv->id.port_num, &rec.mgid,
414 id_priv->qkey = be32_to_cpu(rec.qkey);
422 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
424 dev_addr->dev_type = ARPHRD_INFINIBAND;
425 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
426 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
429 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
433 if (addr->sa_family != AF_IB) {
434 ret = rdma_translate_ip(addr, dev_addr, NULL);
436 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
443 static inline int cma_validate_port(struct ib_device *device, u8 port,
444 union ib_gid *gid, int dev_type,
448 struct net_device *ndev = NULL;
450 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
453 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
456 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port))
457 ndev = dev_get_by_index(&init_net, bound_if_index);
459 ret = ib_find_cached_gid_by_port(device, gid, port, ndev, NULL);
467 static int cma_acquire_dev(struct rdma_id_private *id_priv,
468 struct rdma_id_private *listen_id_priv)
470 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
471 struct cma_device *cma_dev;
472 union ib_gid gid, iboe_gid, *gidp;
476 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
477 id_priv->id.ps == RDMA_PS_IPOIB)
481 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
484 memcpy(&gid, dev_addr->src_dev_addr +
485 rdma_addr_gid_offset(dev_addr), sizeof gid);
487 if (listen_id_priv) {
488 cma_dev = listen_id_priv->cma_dev;
489 port = listen_id_priv->id.port_num;
490 gidp = rdma_protocol_roce(cma_dev->device, port) ?
493 ret = cma_validate_port(cma_dev->device, port, gidp,
495 dev_addr->bound_dev_if);
497 id_priv->id.port_num = port;
502 list_for_each_entry(cma_dev, &dev_list, list) {
503 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
504 if (listen_id_priv &&
505 listen_id_priv->cma_dev == cma_dev &&
506 listen_id_priv->id.port_num == port)
509 gidp = rdma_protocol_roce(cma_dev->device, port) ?
512 ret = cma_validate_port(cma_dev->device, port, gidp,
514 dev_addr->bound_dev_if);
516 id_priv->id.port_num = port;
524 cma_attach_to_dev(id_priv, cma_dev);
531 * Select the source IB device and address to reach the destination IB address.
533 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
535 struct cma_device *cma_dev, *cur_dev;
536 struct sockaddr_ib *addr;
537 union ib_gid gid, sgid, *dgid;
543 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
544 dgid = (union ib_gid *) &addr->sib_addr;
545 pkey = ntohs(addr->sib_pkey);
547 list_for_each_entry(cur_dev, &dev_list, list) {
548 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
549 if (!rdma_cap_af_ib(cur_dev->device, p))
552 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
555 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
558 if (!memcmp(&gid, dgid, sizeof(gid))) {
561 id_priv->id.port_num = p;
565 if (!cma_dev && (gid.global.subnet_prefix ==
566 dgid->global.subnet_prefix)) {
569 id_priv->id.port_num = p;
579 cma_attach_to_dev(id_priv, cma_dev);
580 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
581 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
582 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
586 static void cma_deref_id(struct rdma_id_private *id_priv)
588 if (atomic_dec_and_test(&id_priv->refcount))
589 complete(&id_priv->comp);
592 static int cma_disable_callback(struct rdma_id_private *id_priv,
593 enum rdma_cm_state state)
595 mutex_lock(&id_priv->handler_mutex);
596 if (id_priv->state != state) {
597 mutex_unlock(&id_priv->handler_mutex);
603 struct rdma_cm_id *rdma_create_id(struct net *net,
604 rdma_cm_event_handler event_handler,
605 void *context, enum rdma_port_space ps,
606 enum ib_qp_type qp_type)
608 struct rdma_id_private *id_priv;
610 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
612 return ERR_PTR(-ENOMEM);
614 id_priv->owner = task_pid_nr(current);
615 id_priv->state = RDMA_CM_IDLE;
616 id_priv->id.context = context;
617 id_priv->id.event_handler = event_handler;
619 id_priv->id.qp_type = qp_type;
620 spin_lock_init(&id_priv->lock);
621 mutex_init(&id_priv->qp_mutex);
622 init_completion(&id_priv->comp);
623 atomic_set(&id_priv->refcount, 1);
624 mutex_init(&id_priv->handler_mutex);
625 INIT_LIST_HEAD(&id_priv->listen_list);
626 INIT_LIST_HEAD(&id_priv->mc_list);
627 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
628 id_priv->id.route.addr.dev_addr.net = get_net(net);
632 EXPORT_SYMBOL(rdma_create_id);
634 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
636 struct ib_qp_attr qp_attr;
637 int qp_attr_mask, ret;
639 qp_attr.qp_state = IB_QPS_INIT;
640 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
644 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
648 qp_attr.qp_state = IB_QPS_RTR;
649 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
653 qp_attr.qp_state = IB_QPS_RTS;
655 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
660 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
662 struct ib_qp_attr qp_attr;
663 int qp_attr_mask, ret;
665 qp_attr.qp_state = IB_QPS_INIT;
666 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
670 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
673 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
674 struct ib_qp_init_attr *qp_init_attr)
676 struct rdma_id_private *id_priv;
680 id_priv = container_of(id, struct rdma_id_private, id);
681 if (id->device != pd->device)
684 qp = ib_create_qp(pd, qp_init_attr);
688 if (id->qp_type == IB_QPT_UD)
689 ret = cma_init_ud_qp(id_priv, qp);
691 ret = cma_init_conn_qp(id_priv, qp);
696 id_priv->qp_num = qp->qp_num;
697 id_priv->srq = (qp->srq != NULL);
703 EXPORT_SYMBOL(rdma_create_qp);
705 void rdma_destroy_qp(struct rdma_cm_id *id)
707 struct rdma_id_private *id_priv;
709 id_priv = container_of(id, struct rdma_id_private, id);
710 mutex_lock(&id_priv->qp_mutex);
711 ib_destroy_qp(id_priv->id.qp);
712 id_priv->id.qp = NULL;
713 mutex_unlock(&id_priv->qp_mutex);
715 EXPORT_SYMBOL(rdma_destroy_qp);
717 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
718 struct rdma_conn_param *conn_param)
720 struct ib_qp_attr qp_attr;
721 int qp_attr_mask, ret;
724 mutex_lock(&id_priv->qp_mutex);
725 if (!id_priv->id.qp) {
730 /* Need to update QP attributes from default values. */
731 qp_attr.qp_state = IB_QPS_INIT;
732 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
736 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
740 qp_attr.qp_state = IB_QPS_RTR;
741 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
745 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
746 qp_attr.ah_attr.grh.sgid_index, &sgid, NULL);
750 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
753 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
754 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
756 mutex_unlock(&id_priv->qp_mutex);
760 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
761 struct rdma_conn_param *conn_param)
763 struct ib_qp_attr qp_attr;
764 int qp_attr_mask, ret;
766 mutex_lock(&id_priv->qp_mutex);
767 if (!id_priv->id.qp) {
772 qp_attr.qp_state = IB_QPS_RTS;
773 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
778 qp_attr.max_rd_atomic = conn_param->initiator_depth;
779 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
781 mutex_unlock(&id_priv->qp_mutex);
785 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
787 struct ib_qp_attr qp_attr;
790 mutex_lock(&id_priv->qp_mutex);
791 if (!id_priv->id.qp) {
796 qp_attr.qp_state = IB_QPS_ERR;
797 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
799 mutex_unlock(&id_priv->qp_mutex);
803 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
804 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
806 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
810 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
813 pkey = ib_addr_get_pkey(dev_addr);
815 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
816 pkey, &qp_attr->pkey_index);
820 qp_attr->port_num = id_priv->id.port_num;
821 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
823 if (id_priv->id.qp_type == IB_QPT_UD) {
824 ret = cma_set_qkey(id_priv, 0);
828 qp_attr->qkey = id_priv->qkey;
829 *qp_attr_mask |= IB_QP_QKEY;
831 qp_attr->qp_access_flags = 0;
832 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
837 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
840 struct rdma_id_private *id_priv;
843 id_priv = container_of(id, struct rdma_id_private, id);
844 if (rdma_cap_ib_cm(id->device, id->port_num)) {
845 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
846 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
848 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
851 if (qp_attr->qp_state == IB_QPS_RTR)
852 qp_attr->rq_psn = id_priv->seq_num;
853 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
854 if (!id_priv->cm_id.iw) {
855 qp_attr->qp_access_flags = 0;
856 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
858 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
865 EXPORT_SYMBOL(rdma_init_qp_attr);
867 static inline int cma_zero_addr(struct sockaddr *addr)
869 switch (addr->sa_family) {
871 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
873 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
875 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
881 static inline int cma_loopback_addr(struct sockaddr *addr)
883 switch (addr->sa_family) {
885 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
887 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
889 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
895 static inline int cma_any_addr(struct sockaddr *addr)
897 return cma_zero_addr(addr) || cma_loopback_addr(addr);
900 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
902 if (src->sa_family != dst->sa_family)
905 switch (src->sa_family) {
907 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
908 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
910 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
911 &((struct sockaddr_in6 *) dst)->sin6_addr);
913 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
914 &((struct sockaddr_ib *) dst)->sib_addr);
918 static __be16 cma_port(struct sockaddr *addr)
920 struct sockaddr_ib *sib;
922 switch (addr->sa_family) {
924 return ((struct sockaddr_in *) addr)->sin_port;
926 return ((struct sockaddr_in6 *) addr)->sin6_port;
928 sib = (struct sockaddr_ib *) addr;
929 return htons((u16) (be64_to_cpu(sib->sib_sid) &
930 be64_to_cpu(sib->sib_sid_mask)));
936 static inline int cma_any_port(struct sockaddr *addr)
938 return !cma_port(addr);
941 static void cma_save_ib_info(struct sockaddr *src_addr,
942 struct sockaddr *dst_addr,
943 struct rdma_cm_id *listen_id,
944 struct ib_sa_path_rec *path)
946 struct sockaddr_ib *listen_ib, *ib;
948 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
950 ib = (struct sockaddr_ib *)src_addr;
951 ib->sib_family = AF_IB;
953 ib->sib_pkey = path->pkey;
954 ib->sib_flowinfo = path->flow_label;
955 memcpy(&ib->sib_addr, &path->sgid, 16);
956 ib->sib_sid = path->service_id;
957 ib->sib_scope_id = 0;
959 ib->sib_pkey = listen_ib->sib_pkey;
960 ib->sib_flowinfo = listen_ib->sib_flowinfo;
961 ib->sib_addr = listen_ib->sib_addr;
962 ib->sib_sid = listen_ib->sib_sid;
963 ib->sib_scope_id = listen_ib->sib_scope_id;
965 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
968 ib = (struct sockaddr_ib *)dst_addr;
969 ib->sib_family = AF_IB;
971 ib->sib_pkey = path->pkey;
972 ib->sib_flowinfo = path->flow_label;
973 memcpy(&ib->sib_addr, &path->dgid, 16);
978 static void cma_save_ip4_info(struct sockaddr *src_addr,
979 struct sockaddr *dst_addr,
983 struct sockaddr_in *ip4;
986 ip4 = (struct sockaddr_in *)src_addr;
987 ip4->sin_family = AF_INET;
988 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
989 ip4->sin_port = local_port;
993 ip4 = (struct sockaddr_in *)dst_addr;
994 ip4->sin_family = AF_INET;
995 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
996 ip4->sin_port = hdr->port;
1000 static void cma_save_ip6_info(struct sockaddr *src_addr,
1001 struct sockaddr *dst_addr,
1002 struct cma_hdr *hdr,
1005 struct sockaddr_in6 *ip6;
1008 ip6 = (struct sockaddr_in6 *)src_addr;
1009 ip6->sin6_family = AF_INET6;
1010 ip6->sin6_addr = hdr->dst_addr.ip6;
1011 ip6->sin6_port = local_port;
1015 ip6 = (struct sockaddr_in6 *)dst_addr;
1016 ip6->sin6_family = AF_INET6;
1017 ip6->sin6_addr = hdr->src_addr.ip6;
1018 ip6->sin6_port = hdr->port;
1022 static u16 cma_port_from_service_id(__be64 service_id)
1024 return (u16)be64_to_cpu(service_id);
1027 static int cma_save_ip_info(struct sockaddr *src_addr,
1028 struct sockaddr *dst_addr,
1029 struct ib_cm_event *ib_event,
1032 struct cma_hdr *hdr;
1035 hdr = ib_event->private_data;
1036 if (hdr->cma_version != CMA_VERSION)
1039 port = htons(cma_port_from_service_id(service_id));
1041 switch (cma_get_ip_ver(hdr)) {
1043 cma_save_ip4_info(src_addr, dst_addr, hdr, port);
1046 cma_save_ip6_info(src_addr, dst_addr, hdr, port);
1049 return -EAFNOSUPPORT;
1055 static int cma_save_net_info(struct sockaddr *src_addr,
1056 struct sockaddr *dst_addr,
1057 struct rdma_cm_id *listen_id,
1058 struct ib_cm_event *ib_event,
1059 sa_family_t sa_family, __be64 service_id)
1061 if (sa_family == AF_IB) {
1062 if (ib_event->event == IB_CM_REQ_RECEIVED)
1063 cma_save_ib_info(src_addr, dst_addr, listen_id,
1064 ib_event->param.req_rcvd.primary_path);
1065 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1066 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1070 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1073 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1074 struct cma_req_info *req)
1076 const struct ib_cm_req_event_param *req_param =
1077 &ib_event->param.req_rcvd;
1078 const struct ib_cm_sidr_req_event_param *sidr_param =
1079 &ib_event->param.sidr_req_rcvd;
1081 switch (ib_event->event) {
1082 case IB_CM_REQ_RECEIVED:
1083 req->device = req_param->listen_id->device;
1084 req->port = req_param->port;
1085 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1086 sizeof(req->local_gid));
1087 req->has_gid = true;
1088 req->service_id = req_param->primary_path->service_id;
1089 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1091 case IB_CM_SIDR_REQ_RECEIVED:
1092 req->device = sidr_param->listen_id->device;
1093 req->port = sidr_param->port;
1094 req->has_gid = false;
1095 req->service_id = sidr_param->service_id;
1096 req->pkey = sidr_param->pkey;
1105 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1106 const struct sockaddr_in *dst_addr,
1107 const struct sockaddr_in *src_addr)
1109 __be32 daddr = dst_addr->sin_addr.s_addr,
1110 saddr = src_addr->sin_addr.s_addr;
1111 struct fib_result res;
1116 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1117 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1118 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1119 ipv4_is_loopback(saddr))
1122 memset(&fl4, 0, sizeof(fl4));
1123 fl4.flowi4_iif = net_dev->ifindex;
1128 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1129 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1135 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1136 const struct sockaddr_in6 *dst_addr,
1137 const struct sockaddr_in6 *src_addr)
1139 #if IS_ENABLED(CONFIG_IPV6)
1140 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1141 IPV6_ADDR_LINKLOCAL;
1142 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1143 &src_addr->sin6_addr, net_dev->ifindex,
1150 ret = rt->rt6i_idev->dev == net_dev;
1159 static bool validate_net_dev(struct net_device *net_dev,
1160 const struct sockaddr *daddr,
1161 const struct sockaddr *saddr)
1163 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1164 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1165 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1166 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1168 switch (daddr->sa_family) {
1170 return saddr->sa_family == AF_INET &&
1171 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1174 return saddr->sa_family == AF_INET6 &&
1175 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1182 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1183 const struct cma_req_info *req)
1185 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1186 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1187 *src_addr = (struct sockaddr *)&src_addr_storage;
1188 struct net_device *net_dev;
1189 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1192 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1195 return ERR_PTR(err);
1197 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1200 return ERR_PTR(-ENODEV);
1202 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1204 return ERR_PTR(-EHOSTUNREACH);
1210 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1212 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1215 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1216 const struct cma_hdr *hdr)
1218 struct sockaddr *addr = cma_src_addr(id_priv);
1220 struct in6_addr ip6_addr;
1222 if (cma_any_addr(addr) && !id_priv->afonly)
1225 switch (addr->sa_family) {
1227 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1228 if (cma_get_ip_ver(hdr) != 4)
1230 if (!cma_any_addr(addr) &&
1231 hdr->dst_addr.ip4.addr != ip4_addr)
1235 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1236 if (cma_get_ip_ver(hdr) != 6)
1238 if (!cma_any_addr(addr) &&
1239 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1251 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1253 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1254 enum rdma_transport_type transport =
1255 rdma_node_get_transport(device->node_type);
1257 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1260 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1262 struct ib_device *device = id->device;
1263 const int port_num = id->port_num ?: rdma_start_port(device);
1265 return cma_protocol_roce_dev_port(device, port_num);
1268 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1269 const struct net_device *net_dev,
1272 const struct rdma_addr *addr = &id->route.addr;
1275 /* This request is an AF_IB request or a RoCE request */
1276 return (!id->port_num || id->port_num == port_num) &&
1277 (addr->src_addr.ss_family == AF_IB ||
1278 cma_protocol_roce_dev_port(id->device, port_num));
1280 return !addr->dev_addr.bound_dev_if ||
1281 (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1282 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1285 static struct rdma_id_private *cma_find_listener(
1286 const struct rdma_bind_list *bind_list,
1287 const struct ib_cm_id *cm_id,
1288 const struct ib_cm_event *ib_event,
1289 const struct cma_req_info *req,
1290 const struct net_device *net_dev)
1292 struct rdma_id_private *id_priv, *id_priv_dev;
1295 return ERR_PTR(-EINVAL);
1297 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1298 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1299 if (id_priv->id.device == cm_id->device &&
1300 cma_match_net_dev(&id_priv->id, net_dev, req->port))
1302 list_for_each_entry(id_priv_dev,
1303 &id_priv->listen_list,
1305 if (id_priv_dev->id.device == cm_id->device &&
1306 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1312 return ERR_PTR(-EINVAL);
1315 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1316 struct ib_cm_event *ib_event,
1317 struct net_device **net_dev)
1319 struct cma_req_info req;
1320 struct rdma_bind_list *bind_list;
1321 struct rdma_id_private *id_priv;
1324 err = cma_save_req_info(ib_event, &req);
1326 return ERR_PTR(err);
1328 *net_dev = cma_get_net_dev(ib_event, &req);
1329 if (IS_ERR(*net_dev)) {
1330 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1331 /* Assuming the protocol is AF_IB */
1333 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1334 /* TODO find the net dev matching the request parameters
1335 * through the RoCE GID table */
1338 return ERR_CAST(*net_dev);
1342 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1343 rdma_ps_from_service_id(req.service_id),
1344 cma_port_from_service_id(req.service_id));
1345 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1346 if (IS_ERR(id_priv) && *net_dev) {
1354 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1356 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1359 static void cma_cancel_route(struct rdma_id_private *id_priv)
1361 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1363 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1367 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1369 struct rdma_id_private *dev_id_priv;
1372 * Remove from listen_any_list to prevent added devices from spawning
1373 * additional listen requests.
1376 list_del(&id_priv->list);
1378 while (!list_empty(&id_priv->listen_list)) {
1379 dev_id_priv = list_entry(id_priv->listen_list.next,
1380 struct rdma_id_private, listen_list);
1381 /* sync with device removal to avoid duplicate destruction */
1382 list_del_init(&dev_id_priv->list);
1383 list_del(&dev_id_priv->listen_list);
1384 mutex_unlock(&lock);
1386 rdma_destroy_id(&dev_id_priv->id);
1389 mutex_unlock(&lock);
1392 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1393 enum rdma_cm_state state)
1396 case RDMA_CM_ADDR_QUERY:
1397 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1399 case RDMA_CM_ROUTE_QUERY:
1400 cma_cancel_route(id_priv);
1402 case RDMA_CM_LISTEN:
1403 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1404 cma_cancel_listens(id_priv);
1411 static void cma_release_port(struct rdma_id_private *id_priv)
1413 struct rdma_bind_list *bind_list = id_priv->bind_list;
1414 struct net *net = id_priv->id.route.addr.dev_addr.net;
1420 hlist_del(&id_priv->node);
1421 if (hlist_empty(&bind_list->owners)) {
1422 cma_ps_remove(net, bind_list->ps, bind_list->port);
1425 mutex_unlock(&lock);
1428 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1430 struct cma_multicast *mc;
1432 while (!list_empty(&id_priv->mc_list)) {
1433 mc = container_of(id_priv->mc_list.next,
1434 struct cma_multicast, list);
1435 list_del(&mc->list);
1436 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1437 id_priv->id.port_num)) {
1438 ib_sa_free_multicast(mc->multicast.ib);
1441 kref_put(&mc->mcref, release_mc);
1445 void rdma_destroy_id(struct rdma_cm_id *id)
1447 struct rdma_id_private *id_priv;
1448 enum rdma_cm_state state;
1450 id_priv = container_of(id, struct rdma_id_private, id);
1451 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1452 cma_cancel_operation(id_priv, state);
1455 * Wait for any active callback to finish. New callbacks will find
1456 * the id_priv state set to destroying and abort.
1458 mutex_lock(&id_priv->handler_mutex);
1459 mutex_unlock(&id_priv->handler_mutex);
1461 if (id_priv->cma_dev) {
1462 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1463 if (id_priv->cm_id.ib)
1464 ib_destroy_cm_id(id_priv->cm_id.ib);
1465 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1466 if (id_priv->cm_id.iw)
1467 iw_destroy_cm_id(id_priv->cm_id.iw);
1469 cma_leave_mc_groups(id_priv);
1470 cma_release_dev(id_priv);
1473 cma_release_port(id_priv);
1474 cma_deref_id(id_priv);
1475 wait_for_completion(&id_priv->comp);
1477 if (id_priv->internal_id)
1478 cma_deref_id(id_priv->id.context);
1480 kfree(id_priv->id.route.path_rec);
1481 put_net(id_priv->id.route.addr.dev_addr.net);
1484 EXPORT_SYMBOL(rdma_destroy_id);
1486 static int cma_rep_recv(struct rdma_id_private *id_priv)
1490 ret = cma_modify_qp_rtr(id_priv, NULL);
1494 ret = cma_modify_qp_rts(id_priv, NULL);
1498 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1504 cma_modify_qp_err(id_priv);
1505 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1510 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1511 struct ib_cm_rep_event_param *rep_data,
1514 event->param.conn.private_data = private_data;
1515 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1516 event->param.conn.responder_resources = rep_data->responder_resources;
1517 event->param.conn.initiator_depth = rep_data->initiator_depth;
1518 event->param.conn.flow_control = rep_data->flow_control;
1519 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1520 event->param.conn.srq = rep_data->srq;
1521 event->param.conn.qp_num = rep_data->remote_qpn;
1524 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1526 struct rdma_id_private *id_priv = cm_id->context;
1527 struct rdma_cm_event event;
1530 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1531 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1532 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1533 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1536 memset(&event, 0, sizeof event);
1537 switch (ib_event->event) {
1538 case IB_CM_REQ_ERROR:
1539 case IB_CM_REP_ERROR:
1540 event.event = RDMA_CM_EVENT_UNREACHABLE;
1541 event.status = -ETIMEDOUT;
1543 case IB_CM_REP_RECEIVED:
1544 if (id_priv->id.qp) {
1545 event.status = cma_rep_recv(id_priv);
1546 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1547 RDMA_CM_EVENT_ESTABLISHED;
1549 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1551 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1552 ib_event->private_data);
1554 case IB_CM_RTU_RECEIVED:
1555 case IB_CM_USER_ESTABLISHED:
1556 event.event = RDMA_CM_EVENT_ESTABLISHED;
1558 case IB_CM_DREQ_ERROR:
1559 event.status = -ETIMEDOUT; /* fall through */
1560 case IB_CM_DREQ_RECEIVED:
1561 case IB_CM_DREP_RECEIVED:
1562 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1563 RDMA_CM_DISCONNECT))
1565 event.event = RDMA_CM_EVENT_DISCONNECTED;
1567 case IB_CM_TIMEWAIT_EXIT:
1568 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1570 case IB_CM_MRA_RECEIVED:
1573 case IB_CM_REJ_RECEIVED:
1574 cma_modify_qp_err(id_priv);
1575 event.status = ib_event->param.rej_rcvd.reason;
1576 event.event = RDMA_CM_EVENT_REJECTED;
1577 event.param.conn.private_data = ib_event->private_data;
1578 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1581 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1586 ret = id_priv->id.event_handler(&id_priv->id, &event);
1588 /* Destroy the CM ID by returning a non-zero value. */
1589 id_priv->cm_id.ib = NULL;
1590 cma_exch(id_priv, RDMA_CM_DESTROYING);
1591 mutex_unlock(&id_priv->handler_mutex);
1592 rdma_destroy_id(&id_priv->id);
1596 mutex_unlock(&id_priv->handler_mutex);
1600 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1601 struct ib_cm_event *ib_event,
1602 struct net_device *net_dev)
1604 struct rdma_id_private *id_priv;
1605 struct rdma_cm_id *id;
1606 struct rdma_route *rt;
1607 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1608 const __be64 service_id =
1609 ib_event->param.req_rcvd.primary_path->service_id;
1612 id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1613 listen_id->event_handler, listen_id->context,
1614 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1618 id_priv = container_of(id, struct rdma_id_private, id);
1619 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1620 (struct sockaddr *)&id->route.addr.dst_addr,
1621 listen_id, ib_event, ss_family, service_id))
1625 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1626 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1631 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1632 if (rt->num_paths == 2)
1633 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1636 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1640 if (!cma_protocol_roce(listen_id) &&
1641 cma_any_addr(cma_src_addr(id_priv))) {
1642 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1643 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1644 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1645 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1646 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1651 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1653 id_priv->state = RDMA_CM_CONNECT;
1657 rdma_destroy_id(id);
1661 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1662 struct ib_cm_event *ib_event,
1663 struct net_device *net_dev)
1665 struct rdma_id_private *id_priv;
1666 struct rdma_cm_id *id;
1667 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1668 struct net *net = listen_id->route.addr.dev_addr.net;
1671 id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1672 listen_id->ps, IB_QPT_UD);
1676 id_priv = container_of(id, struct rdma_id_private, id);
1677 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1678 (struct sockaddr *)&id->route.addr.dst_addr,
1679 listen_id, ib_event, ss_family,
1680 ib_event->param.sidr_req_rcvd.service_id))
1684 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1688 if (!cma_any_addr(cma_src_addr(id_priv))) {
1689 ret = cma_translate_addr(cma_src_addr(id_priv),
1690 &id->route.addr.dev_addr);
1696 id_priv->state = RDMA_CM_CONNECT;
1699 rdma_destroy_id(id);
1703 static void cma_set_req_event_data(struct rdma_cm_event *event,
1704 struct ib_cm_req_event_param *req_data,
1705 void *private_data, int offset)
1707 event->param.conn.private_data = private_data + offset;
1708 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1709 event->param.conn.responder_resources = req_data->responder_resources;
1710 event->param.conn.initiator_depth = req_data->initiator_depth;
1711 event->param.conn.flow_control = req_data->flow_control;
1712 event->param.conn.retry_count = req_data->retry_count;
1713 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1714 event->param.conn.srq = req_data->srq;
1715 event->param.conn.qp_num = req_data->remote_qpn;
1718 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1720 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1721 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1722 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1723 (id->qp_type == IB_QPT_UD)) ||
1727 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1729 struct rdma_id_private *listen_id, *conn_id;
1730 struct rdma_cm_event event;
1731 struct net_device *net_dev;
1734 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1735 if (IS_ERR(listen_id))
1736 return PTR_ERR(listen_id);
1738 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1743 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) {
1744 ret = -ECONNABORTED;
1748 memset(&event, 0, sizeof event);
1749 offset = cma_user_data_offset(listen_id);
1750 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1751 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1752 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1753 event.param.ud.private_data = ib_event->private_data + offset;
1754 event.param.ud.private_data_len =
1755 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1757 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1758 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1759 ib_event->private_data, offset);
1766 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1767 ret = cma_acquire_dev(conn_id, listen_id);
1771 conn_id->cm_id.ib = cm_id;
1772 cm_id->context = conn_id;
1773 cm_id->cm_handler = cma_ib_handler;
1776 * Protect against the user destroying conn_id from another thread
1777 * until we're done accessing it.
1779 atomic_inc(&conn_id->refcount);
1780 ret = conn_id->id.event_handler(&conn_id->id, &event);
1784 * Acquire mutex to prevent user executing rdma_destroy_id()
1785 * while we're accessing the cm_id.
1788 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1789 (conn_id->id.qp_type != IB_QPT_UD))
1790 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1791 mutex_unlock(&lock);
1792 mutex_unlock(&conn_id->handler_mutex);
1793 mutex_unlock(&listen_id->handler_mutex);
1794 cma_deref_id(conn_id);
1800 cma_deref_id(conn_id);
1801 /* Destroy the CM ID by returning a non-zero value. */
1802 conn_id->cm_id.ib = NULL;
1804 cma_exch(conn_id, RDMA_CM_DESTROYING);
1805 mutex_unlock(&conn_id->handler_mutex);
1807 mutex_unlock(&listen_id->handler_mutex);
1809 rdma_destroy_id(&conn_id->id);
1818 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1820 if (addr->sa_family == AF_IB)
1821 return ((struct sockaddr_ib *) addr)->sib_sid;
1823 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1825 EXPORT_SYMBOL(rdma_get_service_id);
1827 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1829 struct rdma_id_private *id_priv = iw_id->context;
1830 struct rdma_cm_event event;
1832 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1833 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1835 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1838 memset(&event, 0, sizeof event);
1839 switch (iw_event->event) {
1840 case IW_CM_EVENT_CLOSE:
1841 event.event = RDMA_CM_EVENT_DISCONNECTED;
1843 case IW_CM_EVENT_CONNECT_REPLY:
1844 memcpy(cma_src_addr(id_priv), laddr,
1845 rdma_addr_size(laddr));
1846 memcpy(cma_dst_addr(id_priv), raddr,
1847 rdma_addr_size(raddr));
1848 switch (iw_event->status) {
1850 event.event = RDMA_CM_EVENT_ESTABLISHED;
1851 event.param.conn.initiator_depth = iw_event->ird;
1852 event.param.conn.responder_resources = iw_event->ord;
1856 event.event = RDMA_CM_EVENT_REJECTED;
1859 event.event = RDMA_CM_EVENT_UNREACHABLE;
1862 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1866 case IW_CM_EVENT_ESTABLISHED:
1867 event.event = RDMA_CM_EVENT_ESTABLISHED;
1868 event.param.conn.initiator_depth = iw_event->ird;
1869 event.param.conn.responder_resources = iw_event->ord;
1875 event.status = iw_event->status;
1876 event.param.conn.private_data = iw_event->private_data;
1877 event.param.conn.private_data_len = iw_event->private_data_len;
1878 ret = id_priv->id.event_handler(&id_priv->id, &event);
1880 /* Destroy the CM ID by returning a non-zero value. */
1881 id_priv->cm_id.iw = NULL;
1882 cma_exch(id_priv, RDMA_CM_DESTROYING);
1883 mutex_unlock(&id_priv->handler_mutex);
1884 rdma_destroy_id(&id_priv->id);
1888 mutex_unlock(&id_priv->handler_mutex);
1892 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1893 struct iw_cm_event *iw_event)
1895 struct rdma_cm_id *new_cm_id;
1896 struct rdma_id_private *listen_id, *conn_id;
1897 struct rdma_cm_event event;
1899 struct ib_device_attr attr;
1900 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1901 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1903 listen_id = cm_id->context;
1904 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1905 return -ECONNABORTED;
1907 /* Create a new RDMA id for the new IW CM ID */
1908 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
1909 listen_id->id.event_handler,
1910 listen_id->id.context,
1911 RDMA_PS_TCP, IB_QPT_RC);
1912 if (IS_ERR(new_cm_id)) {
1916 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1917 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1918 conn_id->state = RDMA_CM_CONNECT;
1920 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
1922 mutex_unlock(&conn_id->handler_mutex);
1923 rdma_destroy_id(new_cm_id);
1927 ret = cma_acquire_dev(conn_id, listen_id);
1929 mutex_unlock(&conn_id->handler_mutex);
1930 rdma_destroy_id(new_cm_id);
1934 conn_id->cm_id.iw = cm_id;
1935 cm_id->context = conn_id;
1936 cm_id->cm_handler = cma_iw_handler;
1938 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
1939 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
1941 ret = ib_query_device(conn_id->id.device, &attr);
1943 mutex_unlock(&conn_id->handler_mutex);
1944 rdma_destroy_id(new_cm_id);
1948 memset(&event, 0, sizeof event);
1949 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1950 event.param.conn.private_data = iw_event->private_data;
1951 event.param.conn.private_data_len = iw_event->private_data_len;
1952 event.param.conn.initiator_depth = iw_event->ird;
1953 event.param.conn.responder_resources = iw_event->ord;
1956 * Protect against the user destroying conn_id from another thread
1957 * until we're done accessing it.
1959 atomic_inc(&conn_id->refcount);
1960 ret = conn_id->id.event_handler(&conn_id->id, &event);
1962 /* User wants to destroy the CM ID */
1963 conn_id->cm_id.iw = NULL;
1964 cma_exch(conn_id, RDMA_CM_DESTROYING);
1965 mutex_unlock(&conn_id->handler_mutex);
1966 cma_deref_id(conn_id);
1967 rdma_destroy_id(&conn_id->id);
1971 mutex_unlock(&conn_id->handler_mutex);
1972 cma_deref_id(conn_id);
1975 mutex_unlock(&listen_id->handler_mutex);
1979 static int cma_ib_listen(struct rdma_id_private *id_priv)
1981 struct sockaddr *addr;
1982 struct ib_cm_id *id;
1985 addr = cma_src_addr(id_priv);
1986 svc_id = rdma_get_service_id(&id_priv->id, addr);
1987 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
1990 id_priv->cm_id.ib = id;
1995 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1998 struct iw_cm_id *id;
2000 id = iw_create_cm_id(id_priv->id.device,
2001 iw_conn_req_handler,
2006 id->tos = id_priv->tos;
2007 id_priv->cm_id.iw = id;
2009 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2010 rdma_addr_size(cma_src_addr(id_priv)));
2012 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2015 iw_destroy_cm_id(id_priv->cm_id.iw);
2016 id_priv->cm_id.iw = NULL;
2022 static int cma_listen_handler(struct rdma_cm_id *id,
2023 struct rdma_cm_event *event)
2025 struct rdma_id_private *id_priv = id->context;
2027 id->context = id_priv->id.context;
2028 id->event_handler = id_priv->id.event_handler;
2029 return id_priv->id.event_handler(id, event);
2032 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2033 struct cma_device *cma_dev)
2035 struct rdma_id_private *dev_id_priv;
2036 struct rdma_cm_id *id;
2037 struct net *net = id_priv->id.route.addr.dev_addr.net;
2040 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2043 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2044 id_priv->id.qp_type);
2048 dev_id_priv = container_of(id, struct rdma_id_private, id);
2050 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2051 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2052 rdma_addr_size(cma_src_addr(id_priv)));
2054 cma_attach_to_dev(dev_id_priv, cma_dev);
2055 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2056 atomic_inc(&id_priv->refcount);
2057 dev_id_priv->internal_id = 1;
2058 dev_id_priv->afonly = id_priv->afonly;
2060 ret = rdma_listen(id, id_priv->backlog);
2062 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
2063 "listening on device %s\n", ret, cma_dev->device->name);
2066 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2068 struct cma_device *cma_dev;
2071 list_add_tail(&id_priv->list, &listen_any_list);
2072 list_for_each_entry(cma_dev, &dev_list, list)
2073 cma_listen_on_dev(id_priv, cma_dev);
2074 mutex_unlock(&lock);
2077 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2079 struct rdma_id_private *id_priv;
2081 id_priv = container_of(id, struct rdma_id_private, id);
2082 id_priv->tos = (u8) tos;
2084 EXPORT_SYMBOL(rdma_set_service_type);
2086 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2089 struct cma_work *work = context;
2090 struct rdma_route *route;
2092 route = &work->id->id.route;
2095 route->num_paths = 1;
2096 *route->path_rec = *path_rec;
2098 work->old_state = RDMA_CM_ROUTE_QUERY;
2099 work->new_state = RDMA_CM_ADDR_RESOLVED;
2100 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2101 work->event.status = status;
2104 queue_work(cma_wq, &work->work);
2107 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2108 struct cma_work *work)
2110 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2111 struct ib_sa_path_rec path_rec;
2112 ib_sa_comp_mask comp_mask;
2113 struct sockaddr_in6 *sin6;
2114 struct sockaddr_ib *sib;
2116 memset(&path_rec, 0, sizeof path_rec);
2117 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2118 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2119 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2120 path_rec.numb_path = 1;
2121 path_rec.reversible = 1;
2122 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2124 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2125 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2126 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2128 switch (cma_family(id_priv)) {
2130 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2131 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2134 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2135 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2136 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2139 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2140 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2141 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2145 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2146 id_priv->id.port_num, &path_rec,
2147 comp_mask, timeout_ms,
2148 GFP_KERNEL, cma_query_handler,
2149 work, &id_priv->query);
2151 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2154 static void cma_work_handler(struct work_struct *_work)
2156 struct cma_work *work = container_of(_work, struct cma_work, work);
2157 struct rdma_id_private *id_priv = work->id;
2160 mutex_lock(&id_priv->handler_mutex);
2161 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2164 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2165 cma_exch(id_priv, RDMA_CM_DESTROYING);
2169 mutex_unlock(&id_priv->handler_mutex);
2170 cma_deref_id(id_priv);
2172 rdma_destroy_id(&id_priv->id);
2176 static void cma_ndev_work_handler(struct work_struct *_work)
2178 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2179 struct rdma_id_private *id_priv = work->id;
2182 mutex_lock(&id_priv->handler_mutex);
2183 if (id_priv->state == RDMA_CM_DESTROYING ||
2184 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2187 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2188 cma_exch(id_priv, RDMA_CM_DESTROYING);
2193 mutex_unlock(&id_priv->handler_mutex);
2194 cma_deref_id(id_priv);
2196 rdma_destroy_id(&id_priv->id);
2200 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2202 struct rdma_route *route = &id_priv->id.route;
2203 struct cma_work *work;
2206 work = kzalloc(sizeof *work, GFP_KERNEL);
2211 INIT_WORK(&work->work, cma_work_handler);
2212 work->old_state = RDMA_CM_ROUTE_QUERY;
2213 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2214 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2216 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2217 if (!route->path_rec) {
2222 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2228 kfree(route->path_rec);
2229 route->path_rec = NULL;
2235 int rdma_set_ib_paths(struct rdma_cm_id *id,
2236 struct ib_sa_path_rec *path_rec, int num_paths)
2238 struct rdma_id_private *id_priv;
2241 id_priv = container_of(id, struct rdma_id_private, id);
2242 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2243 RDMA_CM_ROUTE_RESOLVED))
2246 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2248 if (!id->route.path_rec) {
2253 id->route.num_paths = num_paths;
2256 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2259 EXPORT_SYMBOL(rdma_set_ib_paths);
2261 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2263 struct cma_work *work;
2265 work = kzalloc(sizeof *work, GFP_KERNEL);
2270 INIT_WORK(&work->work, cma_work_handler);
2271 work->old_state = RDMA_CM_ROUTE_QUERY;
2272 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2273 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2274 queue_work(cma_wq, &work->work);
2278 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2281 struct net_device *dev;
2283 prio = rt_tos2priority(tos);
2284 dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
2285 vlan_dev_real_dev(ndev) : ndev;
2288 return netdev_get_prio_tc_map(dev, prio);
2290 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2291 if (ndev->priv_flags & IFF_802_1Q_VLAN)
2292 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2293 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2298 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2300 struct rdma_route *route = &id_priv->id.route;
2301 struct rdma_addr *addr = &route->addr;
2302 struct cma_work *work;
2304 struct net_device *ndev = NULL;
2307 work = kzalloc(sizeof *work, GFP_KERNEL);
2312 INIT_WORK(&work->work, cma_work_handler);
2314 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2315 if (!route->path_rec) {
2320 route->num_paths = 1;
2322 if (addr->dev_addr.bound_dev_if) {
2323 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
2324 route->path_rec->net = &init_net;
2325 route->path_rec->ifindex = addr->dev_addr.bound_dev_if;
2332 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
2334 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2335 &route->path_rec->sgid);
2336 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2337 &route->path_rec->dgid);
2339 route->path_rec->hop_limit = 1;
2340 route->path_rec->reversible = 1;
2341 route->path_rec->pkey = cpu_to_be16(0xffff);
2342 route->path_rec->mtu_selector = IB_SA_EQ;
2343 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
2344 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2345 route->path_rec->rate_selector = IB_SA_EQ;
2346 route->path_rec->rate = iboe_get_rate(ndev);
2348 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2349 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2350 if (!route->path_rec->mtu) {
2355 work->old_state = RDMA_CM_ROUTE_QUERY;
2356 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2357 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2358 work->event.status = 0;
2360 queue_work(cma_wq, &work->work);
2365 kfree(route->path_rec);
2366 route->path_rec = NULL;
2372 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2374 struct rdma_id_private *id_priv;
2377 id_priv = container_of(id, struct rdma_id_private, id);
2378 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2381 atomic_inc(&id_priv->refcount);
2382 if (rdma_cap_ib_sa(id->device, id->port_num))
2383 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2384 else if (rdma_protocol_roce(id->device, id->port_num))
2385 ret = cma_resolve_iboe_route(id_priv);
2386 else if (rdma_protocol_iwarp(id->device, id->port_num))
2387 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2396 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2397 cma_deref_id(id_priv);
2400 EXPORT_SYMBOL(rdma_resolve_route);
2402 static void cma_set_loopback(struct sockaddr *addr)
2404 switch (addr->sa_family) {
2406 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2409 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2413 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2419 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2421 struct cma_device *cma_dev, *cur_dev;
2422 struct ib_port_attr port_attr;
2430 list_for_each_entry(cur_dev, &dev_list, list) {
2431 if (cma_family(id_priv) == AF_IB &&
2432 !rdma_cap_ib_cm(cur_dev->device, 1))
2438 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2439 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2440 port_attr.state == IB_PORT_ACTIVE) {
2455 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2459 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2463 id_priv->id.route.addr.dev_addr.dev_type =
2464 (rdma_protocol_ib(cma_dev->device, p)) ?
2465 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2467 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2468 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2469 id_priv->id.port_num = p;
2470 cma_attach_to_dev(id_priv, cma_dev);
2471 cma_set_loopback(cma_src_addr(id_priv));
2473 mutex_unlock(&lock);
2477 static void addr_handler(int status, struct sockaddr *src_addr,
2478 struct rdma_dev_addr *dev_addr, void *context)
2480 struct rdma_id_private *id_priv = context;
2481 struct rdma_cm_event event;
2483 memset(&event, 0, sizeof event);
2484 mutex_lock(&id_priv->handler_mutex);
2485 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2486 RDMA_CM_ADDR_RESOLVED))
2489 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2490 if (!status && !id_priv->cma_dev)
2491 status = cma_acquire_dev(id_priv, NULL);
2494 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2495 RDMA_CM_ADDR_BOUND))
2497 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2498 event.status = status;
2500 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2502 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2503 cma_exch(id_priv, RDMA_CM_DESTROYING);
2504 mutex_unlock(&id_priv->handler_mutex);
2505 cma_deref_id(id_priv);
2506 rdma_destroy_id(&id_priv->id);
2510 mutex_unlock(&id_priv->handler_mutex);
2511 cma_deref_id(id_priv);
2514 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2516 struct cma_work *work;
2520 work = kzalloc(sizeof *work, GFP_KERNEL);
2524 if (!id_priv->cma_dev) {
2525 ret = cma_bind_loopback(id_priv);
2530 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2531 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2534 INIT_WORK(&work->work, cma_work_handler);
2535 work->old_state = RDMA_CM_ADDR_QUERY;
2536 work->new_state = RDMA_CM_ADDR_RESOLVED;
2537 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2538 queue_work(cma_wq, &work->work);
2545 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2547 struct cma_work *work;
2550 work = kzalloc(sizeof *work, GFP_KERNEL);
2554 if (!id_priv->cma_dev) {
2555 ret = cma_resolve_ib_dev(id_priv);
2560 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2561 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2564 INIT_WORK(&work->work, cma_work_handler);
2565 work->old_state = RDMA_CM_ADDR_QUERY;
2566 work->new_state = RDMA_CM_ADDR_RESOLVED;
2567 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2568 queue_work(cma_wq, &work->work);
2575 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2576 struct sockaddr *dst_addr)
2578 if (!src_addr || !src_addr->sa_family) {
2579 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2580 src_addr->sa_family = dst_addr->sa_family;
2581 if (IS_ENABLED(CONFIG_IPV6) &&
2582 dst_addr->sa_family == AF_INET6) {
2583 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2584 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2585 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2586 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2587 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2588 } else if (dst_addr->sa_family == AF_IB) {
2589 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2590 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2593 return rdma_bind_addr(id, src_addr);
2596 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2597 struct sockaddr *dst_addr, int timeout_ms)
2599 struct rdma_id_private *id_priv;
2602 id_priv = container_of(id, struct rdma_id_private, id);
2603 if (id_priv->state == RDMA_CM_IDLE) {
2604 ret = cma_bind_addr(id, src_addr, dst_addr);
2609 if (cma_family(id_priv) != dst_addr->sa_family)
2612 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2615 atomic_inc(&id_priv->refcount);
2616 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2617 if (cma_any_addr(dst_addr)) {
2618 ret = cma_resolve_loopback(id_priv);
2620 if (dst_addr->sa_family == AF_IB) {
2621 ret = cma_resolve_ib_addr(id_priv);
2623 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2624 dst_addr, &id->route.addr.dev_addr,
2625 timeout_ms, addr_handler, id_priv);
2633 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2634 cma_deref_id(id_priv);
2637 EXPORT_SYMBOL(rdma_resolve_addr);
2639 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2641 struct rdma_id_private *id_priv;
2642 unsigned long flags;
2645 id_priv = container_of(id, struct rdma_id_private, id);
2646 spin_lock_irqsave(&id_priv->lock, flags);
2647 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2648 id_priv->reuseaddr = reuse;
2653 spin_unlock_irqrestore(&id_priv->lock, flags);
2656 EXPORT_SYMBOL(rdma_set_reuseaddr);
2658 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2660 struct rdma_id_private *id_priv;
2661 unsigned long flags;
2664 id_priv = container_of(id, struct rdma_id_private, id);
2665 spin_lock_irqsave(&id_priv->lock, flags);
2666 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2667 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2668 id_priv->afonly = afonly;
2673 spin_unlock_irqrestore(&id_priv->lock, flags);
2676 EXPORT_SYMBOL(rdma_set_afonly);
2678 static void cma_bind_port(struct rdma_bind_list *bind_list,
2679 struct rdma_id_private *id_priv)
2681 struct sockaddr *addr;
2682 struct sockaddr_ib *sib;
2686 addr = cma_src_addr(id_priv);
2687 port = htons(bind_list->port);
2689 switch (addr->sa_family) {
2691 ((struct sockaddr_in *) addr)->sin_port = port;
2694 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2697 sib = (struct sockaddr_ib *) addr;
2698 sid = be64_to_cpu(sib->sib_sid);
2699 mask = be64_to_cpu(sib->sib_sid_mask);
2700 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2701 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2704 id_priv->bind_list = bind_list;
2705 hlist_add_head(&id_priv->node, &bind_list->owners);
2708 static int cma_alloc_port(enum rdma_port_space ps,
2709 struct rdma_id_private *id_priv, unsigned short snum)
2711 struct rdma_bind_list *bind_list;
2714 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2718 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
2724 bind_list->port = (unsigned short)ret;
2725 cma_bind_port(bind_list, id_priv);
2729 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2732 static int cma_alloc_any_port(enum rdma_port_space ps,
2733 struct rdma_id_private *id_priv)
2735 static unsigned int last_used_port;
2736 int low, high, remaining;
2738 struct net *net = id_priv->id.route.addr.dev_addr.net;
2740 inet_get_local_port_range(net, &low, &high);
2741 remaining = (high - low) + 1;
2742 rover = prandom_u32() % remaining + low;
2744 if (last_used_port != rover &&
2745 !cma_ps_find(net, ps, (unsigned short)rover)) {
2746 int ret = cma_alloc_port(ps, id_priv, rover);
2748 * Remember previously used port number in order to avoid
2749 * re-using same port immediately after it is closed.
2752 last_used_port = rover;
2753 if (ret != -EADDRNOTAVAIL)
2758 if ((rover < low) || (rover > high))
2762 return -EADDRNOTAVAIL;
2766 * Check that the requested port is available. This is called when trying to
2767 * bind to a specific port, or when trying to listen on a bound port. In
2768 * the latter case, the provided id_priv may already be on the bind_list, but
2769 * we still need to check that it's okay to start listening.
2771 static int cma_check_port(struct rdma_bind_list *bind_list,
2772 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2774 struct rdma_id_private *cur_id;
2775 struct sockaddr *addr, *cur_addr;
2777 addr = cma_src_addr(id_priv);
2778 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2779 if (id_priv == cur_id)
2782 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2786 cur_addr = cma_src_addr(cur_id);
2787 if (id_priv->afonly && cur_id->afonly &&
2788 (addr->sa_family != cur_addr->sa_family))
2791 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2792 return -EADDRNOTAVAIL;
2794 if (!cma_addr_cmp(addr, cur_addr))
2800 static int cma_use_port(enum rdma_port_space ps,
2801 struct rdma_id_private *id_priv)
2803 struct rdma_bind_list *bind_list;
2804 unsigned short snum;
2807 snum = ntohs(cma_port(cma_src_addr(id_priv)));
2808 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2811 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
2813 ret = cma_alloc_port(ps, id_priv, snum);
2815 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2817 cma_bind_port(bind_list, id_priv);
2822 static int cma_bind_listen(struct rdma_id_private *id_priv)
2824 struct rdma_bind_list *bind_list = id_priv->bind_list;
2828 if (bind_list->owners.first->next)
2829 ret = cma_check_port(bind_list, id_priv, 0);
2830 mutex_unlock(&lock);
2834 static enum rdma_port_space cma_select_inet_ps(
2835 struct rdma_id_private *id_priv)
2837 switch (id_priv->id.ps) {
2842 return id_priv->id.ps;
2849 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
2851 enum rdma_port_space ps = 0;
2852 struct sockaddr_ib *sib;
2853 u64 sid_ps, mask, sid;
2855 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2856 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2857 sid = be64_to_cpu(sib->sib_sid) & mask;
2859 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2860 sid_ps = RDMA_IB_IP_PS_IB;
2862 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2863 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2864 sid_ps = RDMA_IB_IP_PS_TCP;
2866 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2867 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2868 sid_ps = RDMA_IB_IP_PS_UDP;
2873 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2874 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2875 be64_to_cpu(sib->sib_sid_mask));
2880 static int cma_get_port(struct rdma_id_private *id_priv)
2882 enum rdma_port_space ps;
2885 if (cma_family(id_priv) != AF_IB)
2886 ps = cma_select_inet_ps(id_priv);
2888 ps = cma_select_ib_ps(id_priv);
2890 return -EPROTONOSUPPORT;
2893 if (cma_any_port(cma_src_addr(id_priv)))
2894 ret = cma_alloc_any_port(ps, id_priv);
2896 ret = cma_use_port(ps, id_priv);
2897 mutex_unlock(&lock);
2902 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2903 struct sockaddr *addr)
2905 #if IS_ENABLED(CONFIG_IPV6)
2906 struct sockaddr_in6 *sin6;
2908 if (addr->sa_family != AF_INET6)
2911 sin6 = (struct sockaddr_in6 *) addr;
2913 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
2916 if (!sin6->sin6_scope_id)
2919 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2924 int rdma_listen(struct rdma_cm_id *id, int backlog)
2926 struct rdma_id_private *id_priv;
2929 id_priv = container_of(id, struct rdma_id_private, id);
2930 if (id_priv->state == RDMA_CM_IDLE) {
2931 id->route.addr.src_addr.ss_family = AF_INET;
2932 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
2937 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2940 if (id_priv->reuseaddr) {
2941 ret = cma_bind_listen(id_priv);
2946 id_priv->backlog = backlog;
2948 if (rdma_cap_ib_cm(id->device, 1)) {
2949 ret = cma_ib_listen(id_priv);
2952 } else if (rdma_cap_iw_cm(id->device, 1)) {
2953 ret = cma_iw_listen(id_priv, backlog);
2961 cma_listen_on_all(id_priv);
2965 id_priv->backlog = 0;
2966 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2969 EXPORT_SYMBOL(rdma_listen);
2971 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2973 struct rdma_id_private *id_priv;
2976 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2977 addr->sa_family != AF_IB)
2978 return -EAFNOSUPPORT;
2980 id_priv = container_of(id, struct rdma_id_private, id);
2981 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2984 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2988 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
2989 if (!cma_any_addr(addr)) {
2990 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
2994 ret = cma_acquire_dev(id_priv, NULL);
2999 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3000 if (addr->sa_family == AF_INET)
3001 id_priv->afonly = 1;
3002 #if IS_ENABLED(CONFIG_IPV6)
3003 else if (addr->sa_family == AF_INET6) {
3004 struct net *net = id_priv->id.route.addr.dev_addr.net;
3006 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3010 ret = cma_get_port(id_priv);
3016 if (id_priv->cma_dev)
3017 cma_release_dev(id_priv);
3019 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3022 EXPORT_SYMBOL(rdma_bind_addr);
3024 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3026 struct cma_hdr *cma_hdr;
3029 cma_hdr->cma_version = CMA_VERSION;
3030 if (cma_family(id_priv) == AF_INET) {
3031 struct sockaddr_in *src4, *dst4;
3033 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3034 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3036 cma_set_ip_ver(cma_hdr, 4);
3037 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3038 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3039 cma_hdr->port = src4->sin_port;
3040 } else if (cma_family(id_priv) == AF_INET6) {
3041 struct sockaddr_in6 *src6, *dst6;
3043 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3044 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3046 cma_set_ip_ver(cma_hdr, 6);
3047 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3048 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3049 cma_hdr->port = src6->sin6_port;
3054 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3055 struct ib_cm_event *ib_event)
3057 struct rdma_id_private *id_priv = cm_id->context;
3058 struct rdma_cm_event event;
3059 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3062 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
3065 memset(&event, 0, sizeof event);
3066 switch (ib_event->event) {
3067 case IB_CM_SIDR_REQ_ERROR:
3068 event.event = RDMA_CM_EVENT_UNREACHABLE;
3069 event.status = -ETIMEDOUT;
3071 case IB_CM_SIDR_REP_RECEIVED:
3072 event.param.ud.private_data = ib_event->private_data;
3073 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3074 if (rep->status != IB_SIDR_SUCCESS) {
3075 event.event = RDMA_CM_EVENT_UNREACHABLE;
3076 event.status = ib_event->param.sidr_rep_rcvd.status;
3079 ret = cma_set_qkey(id_priv, rep->qkey);
3081 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3085 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3086 id_priv->id.route.path_rec,
3087 &event.param.ud.ah_attr);
3088 event.param.ud.qp_num = rep->qpn;
3089 event.param.ud.qkey = rep->qkey;
3090 event.event = RDMA_CM_EVENT_ESTABLISHED;
3094 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
3099 ret = id_priv->id.event_handler(&id_priv->id, &event);
3101 /* Destroy the CM ID by returning a non-zero value. */
3102 id_priv->cm_id.ib = NULL;
3103 cma_exch(id_priv, RDMA_CM_DESTROYING);
3104 mutex_unlock(&id_priv->handler_mutex);
3105 rdma_destroy_id(&id_priv->id);
3109 mutex_unlock(&id_priv->handler_mutex);
3113 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3114 struct rdma_conn_param *conn_param)
3116 struct ib_cm_sidr_req_param req;
3117 struct ib_cm_id *id;
3121 memset(&req, 0, sizeof req);
3122 offset = cma_user_data_offset(id_priv);
3123 req.private_data_len = offset + conn_param->private_data_len;
3124 if (req.private_data_len < conn_param->private_data_len)
3127 if (req.private_data_len) {
3128 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3132 private_data = NULL;
3135 if (conn_param->private_data && conn_param->private_data_len)
3136 memcpy(private_data + offset, conn_param->private_data,
3137 conn_param->private_data_len);
3140 ret = cma_format_hdr(private_data, id_priv);
3143 req.private_data = private_data;
3146 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3152 id_priv->cm_id.ib = id;
3154 req.path = id_priv->id.route.path_rec;
3155 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3156 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3157 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3159 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3161 ib_destroy_cm_id(id_priv->cm_id.ib);
3162 id_priv->cm_id.ib = NULL;
3165 kfree(private_data);
3169 static int cma_connect_ib(struct rdma_id_private *id_priv,
3170 struct rdma_conn_param *conn_param)
3172 struct ib_cm_req_param req;
3173 struct rdma_route *route;
3175 struct ib_cm_id *id;
3178 memset(&req, 0, sizeof req);
3179 offset = cma_user_data_offset(id_priv);
3180 req.private_data_len = offset + conn_param->private_data_len;
3181 if (req.private_data_len < conn_param->private_data_len)
3184 if (req.private_data_len) {
3185 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3189 private_data = NULL;
3192 if (conn_param->private_data && conn_param->private_data_len)
3193 memcpy(private_data + offset, conn_param->private_data,
3194 conn_param->private_data_len);
3196 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3201 id_priv->cm_id.ib = id;
3203 route = &id_priv->id.route;
3205 ret = cma_format_hdr(private_data, id_priv);
3208 req.private_data = private_data;
3211 req.primary_path = &route->path_rec[0];
3212 if (route->num_paths == 2)
3213 req.alternate_path = &route->path_rec[1];
3215 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3216 req.qp_num = id_priv->qp_num;
3217 req.qp_type = id_priv->id.qp_type;
3218 req.starting_psn = id_priv->seq_num;
3219 req.responder_resources = conn_param->responder_resources;
3220 req.initiator_depth = conn_param->initiator_depth;
3221 req.flow_control = conn_param->flow_control;
3222 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3223 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3224 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3225 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3226 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3227 req.srq = id_priv->srq ? 1 : 0;
3229 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3231 if (ret && !IS_ERR(id)) {
3232 ib_destroy_cm_id(id);
3233 id_priv->cm_id.ib = NULL;
3236 kfree(private_data);
3240 static int cma_connect_iw(struct rdma_id_private *id_priv,
3241 struct rdma_conn_param *conn_param)
3243 struct iw_cm_id *cm_id;
3245 struct iw_cm_conn_param iw_param;
3247 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3249 return PTR_ERR(cm_id);
3251 cm_id->tos = id_priv->tos;
3252 id_priv->cm_id.iw = cm_id;
3254 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3255 rdma_addr_size(cma_src_addr(id_priv)));
3256 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3257 rdma_addr_size(cma_dst_addr(id_priv)));
3259 ret = cma_modify_qp_rtr(id_priv, conn_param);
3264 iw_param.ord = conn_param->initiator_depth;
3265 iw_param.ird = conn_param->responder_resources;
3266 iw_param.private_data = conn_param->private_data;
3267 iw_param.private_data_len = conn_param->private_data_len;
3268 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3270 memset(&iw_param, 0, sizeof iw_param);
3271 iw_param.qpn = id_priv->qp_num;
3273 ret = iw_cm_connect(cm_id, &iw_param);
3276 iw_destroy_cm_id(cm_id);
3277 id_priv->cm_id.iw = NULL;
3282 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3284 struct rdma_id_private *id_priv;
3287 id_priv = container_of(id, struct rdma_id_private, id);
3288 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3292 id_priv->qp_num = conn_param->qp_num;
3293 id_priv->srq = conn_param->srq;
3296 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3297 if (id->qp_type == IB_QPT_UD)
3298 ret = cma_resolve_ib_udp(id_priv, conn_param);
3300 ret = cma_connect_ib(id_priv, conn_param);
3301 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3302 ret = cma_connect_iw(id_priv, conn_param);
3310 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3313 EXPORT_SYMBOL(rdma_connect);
3315 static int cma_accept_ib(struct rdma_id_private *id_priv,
3316 struct rdma_conn_param *conn_param)
3318 struct ib_cm_rep_param rep;
3321 ret = cma_modify_qp_rtr(id_priv, conn_param);
3325 ret = cma_modify_qp_rts(id_priv, conn_param);
3329 memset(&rep, 0, sizeof rep);
3330 rep.qp_num = id_priv->qp_num;
3331 rep.starting_psn = id_priv->seq_num;
3332 rep.private_data = conn_param->private_data;
3333 rep.private_data_len = conn_param->private_data_len;
3334 rep.responder_resources = conn_param->responder_resources;
3335 rep.initiator_depth = conn_param->initiator_depth;
3336 rep.failover_accepted = 0;
3337 rep.flow_control = conn_param->flow_control;
3338 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3339 rep.srq = id_priv->srq ? 1 : 0;
3341 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3346 static int cma_accept_iw(struct rdma_id_private *id_priv,
3347 struct rdma_conn_param *conn_param)
3349 struct iw_cm_conn_param iw_param;
3355 ret = cma_modify_qp_rtr(id_priv, conn_param);
3359 iw_param.ord = conn_param->initiator_depth;
3360 iw_param.ird = conn_param->responder_resources;
3361 iw_param.private_data = conn_param->private_data;
3362 iw_param.private_data_len = conn_param->private_data_len;
3363 if (id_priv->id.qp) {
3364 iw_param.qpn = id_priv->qp_num;
3366 iw_param.qpn = conn_param->qp_num;
3368 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3371 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3372 enum ib_cm_sidr_status status, u32 qkey,
3373 const void *private_data, int private_data_len)
3375 struct ib_cm_sidr_rep_param rep;
3378 memset(&rep, 0, sizeof rep);
3379 rep.status = status;
3380 if (status == IB_SIDR_SUCCESS) {
3381 ret = cma_set_qkey(id_priv, qkey);
3384 rep.qp_num = id_priv->qp_num;
3385 rep.qkey = id_priv->qkey;
3387 rep.private_data = private_data;
3388 rep.private_data_len = private_data_len;
3390 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3393 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3395 struct rdma_id_private *id_priv;
3398 id_priv = container_of(id, struct rdma_id_private, id);
3400 id_priv->owner = task_pid_nr(current);
3402 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3405 if (!id->qp && conn_param) {
3406 id_priv->qp_num = conn_param->qp_num;
3407 id_priv->srq = conn_param->srq;
3410 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3411 if (id->qp_type == IB_QPT_UD) {
3413 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3415 conn_param->private_data,
3416 conn_param->private_data_len);
3418 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3422 ret = cma_accept_ib(id_priv, conn_param);
3424 ret = cma_rep_recv(id_priv);
3426 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3427 ret = cma_accept_iw(id_priv, conn_param);
3436 cma_modify_qp_err(id_priv);
3437 rdma_reject(id, NULL, 0);
3440 EXPORT_SYMBOL(rdma_accept);
3442 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3444 struct rdma_id_private *id_priv;
3447 id_priv = container_of(id, struct rdma_id_private, id);
3448 if (!id_priv->cm_id.ib)
3451 switch (id->device->node_type) {
3452 case RDMA_NODE_IB_CA:
3453 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3461 EXPORT_SYMBOL(rdma_notify);
3463 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3464 u8 private_data_len)
3466 struct rdma_id_private *id_priv;
3469 id_priv = container_of(id, struct rdma_id_private, id);
3470 if (!id_priv->cm_id.ib)
3473 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3474 if (id->qp_type == IB_QPT_UD)
3475 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3476 private_data, private_data_len);
3478 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3479 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3480 0, private_data, private_data_len);
3481 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3482 ret = iw_cm_reject(id_priv->cm_id.iw,
3483 private_data, private_data_len);
3489 EXPORT_SYMBOL(rdma_reject);
3491 int rdma_disconnect(struct rdma_cm_id *id)
3493 struct rdma_id_private *id_priv;
3496 id_priv = container_of(id, struct rdma_id_private, id);
3497 if (!id_priv->cm_id.ib)
3500 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3501 ret = cma_modify_qp_err(id_priv);
3504 /* Initiate or respond to a disconnect. */
3505 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3506 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3507 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3508 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3515 EXPORT_SYMBOL(rdma_disconnect);
3517 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3519 struct rdma_id_private *id_priv;
3520 struct cma_multicast *mc = multicast->context;
3521 struct rdma_cm_event event;
3524 id_priv = mc->id_priv;
3525 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3526 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
3530 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3531 mutex_lock(&id_priv->qp_mutex);
3532 if (!status && id_priv->id.qp)
3533 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3534 be16_to_cpu(multicast->rec.mlid));
3535 mutex_unlock(&id_priv->qp_mutex);
3537 memset(&event, 0, sizeof event);
3538 event.status = status;
3539 event.param.ud.private_data = mc->context;
3541 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3542 ib_init_ah_from_mcmember(id_priv->id.device,
3543 id_priv->id.port_num, &multicast->rec,
3544 &event.param.ud.ah_attr);
3545 event.param.ud.qp_num = 0xFFFFFF;
3546 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3548 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3550 ret = id_priv->id.event_handler(&id_priv->id, &event);
3552 cma_exch(id_priv, RDMA_CM_DESTROYING);
3553 mutex_unlock(&id_priv->handler_mutex);
3554 rdma_destroy_id(&id_priv->id);
3558 mutex_unlock(&id_priv->handler_mutex);
3562 static void cma_set_mgid(struct rdma_id_private *id_priv,
3563 struct sockaddr *addr, union ib_gid *mgid)
3565 unsigned char mc_map[MAX_ADDR_LEN];
3566 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3567 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3568 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3570 if (cma_any_addr(addr)) {
3571 memset(mgid, 0, sizeof *mgid);
3572 } else if ((addr->sa_family == AF_INET6) &&
3573 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3575 /* IPv6 address is an SA assigned MGID. */
3576 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3577 } else if (addr->sa_family == AF_IB) {
3578 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3579 } else if ((addr->sa_family == AF_INET6)) {
3580 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3581 if (id_priv->id.ps == RDMA_PS_UDP)
3582 mc_map[7] = 0x01; /* Use RDMA CM signature */
3583 *mgid = *(union ib_gid *) (mc_map + 4);
3585 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3586 if (id_priv->id.ps == RDMA_PS_UDP)
3587 mc_map[7] = 0x01; /* Use RDMA CM signature */
3588 *mgid = *(union ib_gid *) (mc_map + 4);
3592 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3593 struct cma_multicast *mc)
3595 struct ib_sa_mcmember_rec rec;
3596 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3597 ib_sa_comp_mask comp_mask;
3600 ib_addr_get_mgid(dev_addr, &rec.mgid);
3601 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3606 ret = cma_set_qkey(id_priv, 0);
3610 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3611 rec.qkey = cpu_to_be32(id_priv->qkey);
3612 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3613 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3616 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3617 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3618 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3619 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3620 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3622 if (id_priv->id.ps == RDMA_PS_IPOIB)
3623 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3624 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3625 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3626 IB_SA_MCMEMBER_REC_MTU |
3627 IB_SA_MCMEMBER_REC_HOP_LIMIT;
3629 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3630 id_priv->id.port_num, &rec,
3631 comp_mask, GFP_KERNEL,
3632 cma_ib_mc_handler, mc);
3633 return PTR_ERR_OR_ZERO(mc->multicast.ib);
3636 static void iboe_mcast_work_handler(struct work_struct *work)
3638 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3639 struct cma_multicast *mc = mw->mc;
3640 struct ib_sa_multicast *m = mc->multicast.ib;
3642 mc->multicast.ib->context = mc;
3643 cma_ib_mc_handler(0, m);
3644 kref_put(&mc->mcref, release_mc);
3648 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3650 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3651 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3653 if (cma_any_addr(addr)) {
3654 memset(mgid, 0, sizeof *mgid);
3655 } else if (addr->sa_family == AF_INET6) {
3656 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3658 mgid->raw[0] = 0xff;
3659 mgid->raw[1] = 0x0e;
3668 mgid->raw[10] = 0xff;
3669 mgid->raw[11] = 0xff;
3670 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3674 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3675 struct cma_multicast *mc)
3677 struct iboe_mcast_work *work;
3678 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3680 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3681 struct net_device *ndev = NULL;
3683 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3686 work = kzalloc(sizeof *work, GFP_KERNEL);
3690 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3691 if (!mc->multicast.ib) {
3696 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3698 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3699 if (id_priv->id.ps == RDMA_PS_UDP)
3700 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3702 if (dev_addr->bound_dev_if)
3703 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3708 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3709 mc->multicast.ib->rec.hop_limit = 1;
3710 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3712 if (!mc->multicast.ib->rec.mtu) {
3716 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3717 &mc->multicast.ib->rec.port_gid);
3720 INIT_WORK(&work->work, iboe_mcast_work_handler);
3721 kref_get(&mc->mcref);
3722 queue_work(cma_wq, &work->work);
3727 kfree(mc->multicast.ib);
3733 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3736 struct rdma_id_private *id_priv;
3737 struct cma_multicast *mc;
3740 id_priv = container_of(id, struct rdma_id_private, id);
3741 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3742 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3745 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3749 memcpy(&mc->addr, addr, rdma_addr_size(addr));
3750 mc->context = context;
3751 mc->id_priv = id_priv;
3753 spin_lock(&id_priv->lock);
3754 list_add(&mc->list, &id_priv->mc_list);
3755 spin_unlock(&id_priv->lock);
3757 if (rdma_protocol_roce(id->device, id->port_num)) {
3758 kref_init(&mc->mcref);
3759 ret = cma_iboe_join_multicast(id_priv, mc);
3760 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
3761 ret = cma_join_ib_multicast(id_priv, mc);
3766 spin_lock_irq(&id_priv->lock);
3767 list_del(&mc->list);
3768 spin_unlock_irq(&id_priv->lock);
3773 EXPORT_SYMBOL(rdma_join_multicast);
3775 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3777 struct rdma_id_private *id_priv;
3778 struct cma_multicast *mc;
3780 id_priv = container_of(id, struct rdma_id_private, id);
3781 spin_lock_irq(&id_priv->lock);
3782 list_for_each_entry(mc, &id_priv->mc_list, list) {
3783 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
3784 list_del(&mc->list);
3785 spin_unlock_irq(&id_priv->lock);
3788 ib_detach_mcast(id->qp,
3789 &mc->multicast.ib->rec.mgid,
3790 be16_to_cpu(mc->multicast.ib->rec.mlid));
3792 BUG_ON(id_priv->cma_dev->device != id->device);
3794 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
3795 ib_sa_free_multicast(mc->multicast.ib);
3797 } else if (rdma_protocol_roce(id->device, id->port_num))
3798 kref_put(&mc->mcref, release_mc);
3803 spin_unlock_irq(&id_priv->lock);
3805 EXPORT_SYMBOL(rdma_leave_multicast);
3807 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3809 struct rdma_dev_addr *dev_addr;
3810 struct cma_ndev_work *work;
3812 dev_addr = &id_priv->id.route.addr.dev_addr;
3814 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3815 (net_eq(dev_net(ndev), dev_addr->net)) &&
3816 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3817 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3818 ndev->name, &id_priv->id);
3819 work = kzalloc(sizeof *work, GFP_KERNEL);
3823 INIT_WORK(&work->work, cma_ndev_work_handler);
3825 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3826 atomic_inc(&id_priv->refcount);
3827 queue_work(cma_wq, &work->work);
3833 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3836 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
3837 struct cma_device *cma_dev;
3838 struct rdma_id_private *id_priv;
3839 int ret = NOTIFY_DONE;
3841 if (event != NETDEV_BONDING_FAILOVER)
3844 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3848 list_for_each_entry(cma_dev, &dev_list, list)
3849 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3850 ret = cma_netdev_change(ndev, id_priv);
3856 mutex_unlock(&lock);
3860 static struct notifier_block cma_nb = {
3861 .notifier_call = cma_netdev_callback
3864 static void cma_add_one(struct ib_device *device)
3866 struct cma_device *cma_dev;
3867 struct rdma_id_private *id_priv;
3869 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3873 cma_dev->device = device;
3875 init_completion(&cma_dev->comp);
3876 atomic_set(&cma_dev->refcount, 1);
3877 INIT_LIST_HEAD(&cma_dev->id_list);
3878 ib_set_client_data(device, &cma_client, cma_dev);
3881 list_add_tail(&cma_dev->list, &dev_list);
3882 list_for_each_entry(id_priv, &listen_any_list, list)
3883 cma_listen_on_dev(id_priv, cma_dev);
3884 mutex_unlock(&lock);
3887 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3889 struct rdma_cm_event event;
3890 enum rdma_cm_state state;
3893 /* Record that we want to remove the device */
3894 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3895 if (state == RDMA_CM_DESTROYING)
3898 cma_cancel_operation(id_priv, state);
3899 mutex_lock(&id_priv->handler_mutex);
3901 /* Check for destruction from another callback. */
3902 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3905 memset(&event, 0, sizeof event);
3906 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3907 ret = id_priv->id.event_handler(&id_priv->id, &event);
3909 mutex_unlock(&id_priv->handler_mutex);
3913 static void cma_process_remove(struct cma_device *cma_dev)
3915 struct rdma_id_private *id_priv;
3919 while (!list_empty(&cma_dev->id_list)) {
3920 id_priv = list_entry(cma_dev->id_list.next,
3921 struct rdma_id_private, list);
3923 list_del(&id_priv->listen_list);
3924 list_del_init(&id_priv->list);
3925 atomic_inc(&id_priv->refcount);
3926 mutex_unlock(&lock);
3928 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3929 cma_deref_id(id_priv);
3931 rdma_destroy_id(&id_priv->id);
3935 mutex_unlock(&lock);
3937 cma_deref_dev(cma_dev);
3938 wait_for_completion(&cma_dev->comp);
3941 static void cma_remove_one(struct ib_device *device, void *client_data)
3943 struct cma_device *cma_dev = client_data;
3949 list_del(&cma_dev->list);
3950 mutex_unlock(&lock);
3952 cma_process_remove(cma_dev);
3956 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3958 struct nlmsghdr *nlh;
3959 struct rdma_cm_id_stats *id_stats;
3960 struct rdma_id_private *id_priv;
3961 struct rdma_cm_id *id = NULL;
3962 struct cma_device *cma_dev;
3963 int i_dev = 0, i_id = 0;
3966 * We export all of the IDs as a sequence of messages. Each
3967 * ID gets its own netlink message.
3971 list_for_each_entry(cma_dev, &dev_list, list) {
3972 if (i_dev < cb->args[0]) {
3978 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3979 if (i_id < cb->args[1]) {
3984 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3985 sizeof *id_stats, RDMA_NL_RDMA_CM,
3986 RDMA_NL_RDMA_CM_ID_STATS,
3991 memset(id_stats, 0, sizeof *id_stats);
3993 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3994 id_stats->port_num = id->port_num;
3995 id_stats->bound_dev_if =
3996 id->route.addr.dev_addr.bound_dev_if;
3998 if (ibnl_put_attr(skb, nlh,
3999 rdma_addr_size(cma_src_addr(id_priv)),
4000 cma_src_addr(id_priv),
4001 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4003 if (ibnl_put_attr(skb, nlh,
4004 rdma_addr_size(cma_src_addr(id_priv)),
4005 cma_dst_addr(id_priv),
4006 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4009 id_stats->pid = id_priv->owner;
4010 id_stats->port_space = id->ps;
4011 id_stats->cm_state = id_priv->state;
4012 id_stats->qp_num = id_priv->qp_num;
4013 id_stats->qp_type = id->qp_type;
4023 mutex_unlock(&lock);
4024 cb->args[0] = i_dev;
4030 static const struct ibnl_client_cbs cma_cb_table[] = {
4031 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
4032 .module = THIS_MODULE },
4035 static int cma_init_net(struct net *net)
4037 struct cma_pernet *pernet = cma_pernet(net);
4039 idr_init(&pernet->tcp_ps);
4040 idr_init(&pernet->udp_ps);
4041 idr_init(&pernet->ipoib_ps);
4042 idr_init(&pernet->ib_ps);
4047 static void cma_exit_net(struct net *net)
4049 struct cma_pernet *pernet = cma_pernet(net);
4051 idr_destroy(&pernet->tcp_ps);
4052 idr_destroy(&pernet->udp_ps);
4053 idr_destroy(&pernet->ipoib_ps);
4054 idr_destroy(&pernet->ib_ps);
4057 static struct pernet_operations cma_pernet_operations = {
4058 .init = cma_init_net,
4059 .exit = cma_exit_net,
4060 .id = &cma_pernet_id,
4061 .size = sizeof(struct cma_pernet),
4064 static int __init cma_init(void)
4068 cma_wq = create_singlethread_workqueue("rdma_cm");
4072 ret = register_pernet_subsys(&cma_pernet_operations);
4076 ib_sa_register_client(&sa_client);
4077 rdma_addr_register_client(&addr_client);
4078 register_netdevice_notifier(&cma_nb);
4080 ret = ib_register_client(&cma_client);
4084 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
4085 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
4090 unregister_netdevice_notifier(&cma_nb);
4091 rdma_addr_unregister_client(&addr_client);
4092 ib_sa_unregister_client(&sa_client);
4094 destroy_workqueue(cma_wq);
4098 static void __exit cma_cleanup(void)
4100 ibnl_remove_client(RDMA_NL_RDMA_CM);
4101 ib_unregister_client(&cma_client);
4102 unregister_netdevice_notifier(&cma_nb);
4103 rdma_addr_unregister_client(&addr_client);
4104 ib_sa_unregister_client(&sa_client);
4105 unregister_pernet_subsys(&cma_pernet_operations);
4106 destroy_workqueue(cma_wq);
4109 module_init(cma_init);
4110 module_exit(cma_cleanup);