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>
50 #include <rdma/rdma_cm.h>
51 #include <rdma/rdma_cm_ib.h>
52 #include <rdma/rdma_netlink.h>
53 #include <rdma/ib_cache.h>
54 #include <rdma/ib_cm.h>
55 #include <rdma/ib_sa.h>
56 #include <rdma/iw_cm.h>
58 MODULE_AUTHOR("Sean Hefty");
59 MODULE_DESCRIPTION("Generic RDMA CM Agent");
60 MODULE_LICENSE("Dual BSD/GPL");
62 #define CMA_CM_RESPONSE_TIMEOUT 20
63 #define CMA_MAX_CM_RETRIES 15
64 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
65 #define CMA_IBOE_PACKET_LIFETIME 18
67 static void cma_add_one(struct ib_device *device);
68 static void cma_remove_one(struct ib_device *device);
70 static struct ib_client cma_client = {
73 .remove = cma_remove_one
76 static struct ib_sa_client sa_client;
77 static struct rdma_addr_client addr_client;
78 static LIST_HEAD(dev_list);
79 static LIST_HEAD(listen_any_list);
80 static DEFINE_MUTEX(lock);
81 static struct workqueue_struct *cma_wq;
82 static DEFINE_IDR(sdp_ps);
83 static DEFINE_IDR(tcp_ps);
84 static DEFINE_IDR(udp_ps);
85 static DEFINE_IDR(ipoib_ps);
86 static DEFINE_IDR(ib_ps);
89 struct list_head list;
90 struct ib_device *device;
91 struct completion comp;
93 struct list_head id_list;
96 struct rdma_bind_list {
98 struct hlist_head owners;
107 * Device removal can occur at anytime, so we need extra handling to
108 * serialize notifying the user of device removal with other callbacks.
109 * We do this by disabling removal notification while a callback is in process,
110 * and reporting it after the callback completes.
112 struct rdma_id_private {
113 struct rdma_cm_id id;
115 struct rdma_bind_list *bind_list;
116 struct hlist_node node;
117 struct list_head list; /* listen_any_list or cma_device.list */
118 struct list_head listen_list; /* per device listens */
119 struct cma_device *cma_dev;
120 struct list_head mc_list;
123 enum rdma_cm_state state;
125 struct mutex qp_mutex;
127 struct completion comp;
129 struct mutex handler_mutex;
133 struct ib_sa_query *query;
151 struct cma_multicast {
152 struct rdma_id_private *id_priv;
154 struct ib_sa_multicast *ib;
156 struct list_head list;
158 struct sockaddr_storage addr;
163 struct work_struct work;
164 struct rdma_id_private *id;
165 enum rdma_cm_state old_state;
166 enum rdma_cm_state new_state;
167 struct rdma_cm_event event;
170 struct cma_ndev_work {
171 struct work_struct work;
172 struct rdma_id_private *id;
173 struct rdma_cm_event event;
176 struct iboe_mcast_work {
177 struct work_struct work;
178 struct rdma_id_private *id;
179 struct cma_multicast *mc;
192 u8 ip_version; /* IP version: 7:4 */
194 union cma_ip_addr src_addr;
195 union cma_ip_addr dst_addr;
200 u8 sdp_version; /* Major version: 7:4 */
201 u8 ip_version; /* IP version: 7:4 */
202 u8 sdp_specific1[10];
204 __be16 sdp_specific2;
205 union cma_ip_addr src_addr;
206 union cma_ip_addr dst_addr;
214 #define CMA_VERSION 0x00
215 #define SDP_MAJ_VERSION 0x2
217 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
222 spin_lock_irqsave(&id_priv->lock, flags);
223 ret = (id_priv->state == comp);
224 spin_unlock_irqrestore(&id_priv->lock, flags);
228 static int cma_comp_exch(struct rdma_id_private *id_priv,
229 enum rdma_cm_state comp, enum rdma_cm_state exch)
234 spin_lock_irqsave(&id_priv->lock, flags);
235 if ((ret = (id_priv->state == comp)))
236 id_priv->state = exch;
237 spin_unlock_irqrestore(&id_priv->lock, flags);
241 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
242 enum rdma_cm_state exch)
245 enum rdma_cm_state old;
247 spin_lock_irqsave(&id_priv->lock, flags);
248 old = id_priv->state;
249 id_priv->state = exch;
250 spin_unlock_irqrestore(&id_priv->lock, flags);
254 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
256 return hdr->ip_version >> 4;
259 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
261 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
264 static inline u8 sdp_get_majv(u8 sdp_version)
266 return sdp_version >> 4;
269 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
271 return hh->ip_version >> 4;
274 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
276 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
279 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
280 struct cma_device *cma_dev)
282 atomic_inc(&cma_dev->refcount);
283 id_priv->cma_dev = cma_dev;
284 id_priv->id.device = cma_dev->device;
285 id_priv->id.route.addr.dev_addr.transport =
286 rdma_node_get_transport(cma_dev->device->node_type);
287 list_add_tail(&id_priv->list, &cma_dev->id_list);
290 static inline void cma_deref_dev(struct cma_device *cma_dev)
292 if (atomic_dec_and_test(&cma_dev->refcount))
293 complete(&cma_dev->comp);
296 static inline void release_mc(struct kref *kref)
298 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
300 kfree(mc->multicast.ib);
304 static void cma_release_dev(struct rdma_id_private *id_priv)
307 list_del(&id_priv->list);
308 cma_deref_dev(id_priv->cma_dev);
309 id_priv->cma_dev = NULL;
313 static int cma_set_qkey(struct rdma_id_private *id_priv)
315 struct ib_sa_mcmember_rec rec;
321 switch (id_priv->id.ps) {
323 id_priv->qkey = RDMA_UDP_QKEY;
326 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
327 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
328 id_priv->id.port_num, &rec.mgid,
331 id_priv->qkey = be32_to_cpu(rec.qkey);
339 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
343 struct ib_port_attr props;
346 err = ib_query_port(device, port_num, &props);
350 for (i = 0; i < props.gid_tbl_len; ++i) {
351 err = ib_query_gid(device, port_num, i, &tmp);
354 if (!memcmp(&tmp, gid, sizeof tmp))
361 static int cma_acquire_dev(struct rdma_id_private *id_priv)
363 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
364 struct cma_device *cma_dev;
365 union ib_gid gid, iboe_gid;
368 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
369 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
371 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
372 id_priv->id.ps == RDMA_PS_IPOIB)
376 iboe_addr_get_sgid(dev_addr, &iboe_gid);
377 memcpy(&gid, dev_addr->src_dev_addr +
378 rdma_addr_gid_offset(dev_addr), sizeof gid);
379 list_for_each_entry(cma_dev, &dev_list, list) {
380 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
381 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
382 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
383 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
384 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
386 ret = find_gid_port(cma_dev->device, &gid, port);
389 id_priv->id.port_num = port;
399 cma_attach_to_dev(id_priv, cma_dev);
405 static void cma_deref_id(struct rdma_id_private *id_priv)
407 if (atomic_dec_and_test(&id_priv->refcount))
408 complete(&id_priv->comp);
411 static int cma_disable_callback(struct rdma_id_private *id_priv,
412 enum rdma_cm_state state)
414 mutex_lock(&id_priv->handler_mutex);
415 if (id_priv->state != state) {
416 mutex_unlock(&id_priv->handler_mutex);
422 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
423 void *context, enum rdma_port_space ps,
424 enum ib_qp_type qp_type)
426 struct rdma_id_private *id_priv;
428 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
430 return ERR_PTR(-ENOMEM);
432 id_priv->owner = task_pid_nr(current);
433 id_priv->state = RDMA_CM_IDLE;
434 id_priv->id.context = context;
435 id_priv->id.event_handler = event_handler;
437 id_priv->id.qp_type = qp_type;
438 spin_lock_init(&id_priv->lock);
439 mutex_init(&id_priv->qp_mutex);
440 init_completion(&id_priv->comp);
441 atomic_set(&id_priv->refcount, 1);
442 mutex_init(&id_priv->handler_mutex);
443 INIT_LIST_HEAD(&id_priv->listen_list);
444 INIT_LIST_HEAD(&id_priv->mc_list);
445 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
449 EXPORT_SYMBOL(rdma_create_id);
451 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
453 struct ib_qp_attr qp_attr;
454 int qp_attr_mask, ret;
456 qp_attr.qp_state = IB_QPS_INIT;
457 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
461 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
465 qp_attr.qp_state = IB_QPS_RTR;
466 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
470 qp_attr.qp_state = IB_QPS_RTS;
472 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
477 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
479 struct ib_qp_attr qp_attr;
480 int qp_attr_mask, ret;
482 qp_attr.qp_state = IB_QPS_INIT;
483 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
487 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
490 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
491 struct ib_qp_init_attr *qp_init_attr)
493 struct rdma_id_private *id_priv;
497 id_priv = container_of(id, struct rdma_id_private, id);
498 if (id->device != pd->device)
501 qp = ib_create_qp(pd, qp_init_attr);
505 if (id->qp_type == IB_QPT_UD)
506 ret = cma_init_ud_qp(id_priv, qp);
508 ret = cma_init_conn_qp(id_priv, qp);
513 id_priv->qp_num = qp->qp_num;
514 id_priv->srq = (qp->srq != NULL);
520 EXPORT_SYMBOL(rdma_create_qp);
522 void rdma_destroy_qp(struct rdma_cm_id *id)
524 struct rdma_id_private *id_priv;
526 id_priv = container_of(id, struct rdma_id_private, id);
527 mutex_lock(&id_priv->qp_mutex);
528 ib_destroy_qp(id_priv->id.qp);
529 id_priv->id.qp = NULL;
530 mutex_unlock(&id_priv->qp_mutex);
532 EXPORT_SYMBOL(rdma_destroy_qp);
534 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
535 struct rdma_conn_param *conn_param)
537 struct ib_qp_attr qp_attr;
538 int qp_attr_mask, ret;
540 mutex_lock(&id_priv->qp_mutex);
541 if (!id_priv->id.qp) {
546 /* Need to update QP attributes from default values. */
547 qp_attr.qp_state = IB_QPS_INIT;
548 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
552 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
556 qp_attr.qp_state = IB_QPS_RTR;
557 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
562 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
563 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
565 mutex_unlock(&id_priv->qp_mutex);
569 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
570 struct rdma_conn_param *conn_param)
572 struct ib_qp_attr qp_attr;
573 int qp_attr_mask, ret;
575 mutex_lock(&id_priv->qp_mutex);
576 if (!id_priv->id.qp) {
581 qp_attr.qp_state = IB_QPS_RTS;
582 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
587 qp_attr.max_rd_atomic = conn_param->initiator_depth;
588 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
590 mutex_unlock(&id_priv->qp_mutex);
594 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
596 struct ib_qp_attr qp_attr;
599 mutex_lock(&id_priv->qp_mutex);
600 if (!id_priv->id.qp) {
605 qp_attr.qp_state = IB_QPS_ERR;
606 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
608 mutex_unlock(&id_priv->qp_mutex);
612 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
613 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
615 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
619 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
620 IB_LINK_LAYER_INFINIBAND)
621 pkey = ib_addr_get_pkey(dev_addr);
625 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
626 pkey, &qp_attr->pkey_index);
630 qp_attr->port_num = id_priv->id.port_num;
631 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
633 if (id_priv->id.qp_type == IB_QPT_UD) {
634 ret = cma_set_qkey(id_priv);
638 qp_attr->qkey = id_priv->qkey;
639 *qp_attr_mask |= IB_QP_QKEY;
641 qp_attr->qp_access_flags = 0;
642 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
647 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
650 struct rdma_id_private *id_priv;
653 id_priv = container_of(id, struct rdma_id_private, id);
654 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
655 case RDMA_TRANSPORT_IB:
656 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
657 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
659 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
661 if (qp_attr->qp_state == IB_QPS_RTR)
662 qp_attr->rq_psn = id_priv->seq_num;
664 case RDMA_TRANSPORT_IWARP:
665 if (!id_priv->cm_id.iw) {
666 qp_attr->qp_access_flags = 0;
667 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
669 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
679 EXPORT_SYMBOL(rdma_init_qp_attr);
681 static inline int cma_zero_addr(struct sockaddr *addr)
683 struct in6_addr *ip6;
685 if (addr->sa_family == AF_INET)
686 return ipv4_is_zeronet(
687 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
689 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
690 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
691 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
695 static inline int cma_loopback_addr(struct sockaddr *addr)
697 if (addr->sa_family == AF_INET)
698 return ipv4_is_loopback(
699 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
701 return ipv6_addr_loopback(
702 &((struct sockaddr_in6 *) addr)->sin6_addr);
705 static inline int cma_any_addr(struct sockaddr *addr)
707 return cma_zero_addr(addr) || cma_loopback_addr(addr);
710 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
712 if (src->sa_family != dst->sa_family)
715 switch (src->sa_family) {
717 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
718 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
720 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
721 &((struct sockaddr_in6 *) dst)->sin6_addr);
725 static inline __be16 cma_port(struct sockaddr *addr)
727 if (addr->sa_family == AF_INET)
728 return ((struct sockaddr_in *) addr)->sin_port;
730 return ((struct sockaddr_in6 *) addr)->sin6_port;
733 static inline int cma_any_port(struct sockaddr *addr)
735 return !cma_port(addr);
738 static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
739 u8 *ip_ver, __be16 *port,
740 union cma_ip_addr **src, union cma_ip_addr **dst)
744 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
748 *ip_ver = sdp_get_ip_ver(hdr);
749 *port = ((struct sdp_hh *) hdr)->port;
750 *src = &((struct sdp_hh *) hdr)->src_addr;
751 *dst = &((struct sdp_hh *) hdr)->dst_addr;
754 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
757 *ip_ver = cma_get_ip_ver(hdr);
758 *port = ((struct cma_hdr *) hdr)->port;
759 *src = &((struct cma_hdr *) hdr)->src_addr;
760 *dst = &((struct cma_hdr *) hdr)->dst_addr;
764 if (*ip_ver != 4 && *ip_ver != 6)
769 static void cma_save_net_info(struct rdma_addr *addr,
770 struct rdma_addr *listen_addr,
771 u8 ip_ver, __be16 port,
772 union cma_ip_addr *src, union cma_ip_addr *dst)
774 struct sockaddr_in *listen4, *ip4;
775 struct sockaddr_in6 *listen6, *ip6;
779 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
780 ip4 = (struct sockaddr_in *) &addr->src_addr;
781 ip4->sin_family = listen4->sin_family;
782 ip4->sin_addr.s_addr = dst->ip4.addr;
783 ip4->sin_port = listen4->sin_port;
785 ip4 = (struct sockaddr_in *) &addr->dst_addr;
786 ip4->sin_family = listen4->sin_family;
787 ip4->sin_addr.s_addr = src->ip4.addr;
788 ip4->sin_port = port;
791 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
792 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
793 ip6->sin6_family = listen6->sin6_family;
794 ip6->sin6_addr = dst->ip6;
795 ip6->sin6_port = listen6->sin6_port;
797 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
798 ip6->sin6_family = listen6->sin6_family;
799 ip6->sin6_addr = src->ip6;
800 ip6->sin6_port = port;
807 static inline int cma_user_data_offset(enum rdma_port_space ps)
813 return sizeof(struct cma_hdr);
817 static void cma_cancel_route(struct rdma_id_private *id_priv)
819 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
820 case IB_LINK_LAYER_INFINIBAND:
822 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
829 static void cma_cancel_listens(struct rdma_id_private *id_priv)
831 struct rdma_id_private *dev_id_priv;
834 * Remove from listen_any_list to prevent added devices from spawning
835 * additional listen requests.
838 list_del(&id_priv->list);
840 while (!list_empty(&id_priv->listen_list)) {
841 dev_id_priv = list_entry(id_priv->listen_list.next,
842 struct rdma_id_private, listen_list);
843 /* sync with device removal to avoid duplicate destruction */
844 list_del_init(&dev_id_priv->list);
845 list_del(&dev_id_priv->listen_list);
848 rdma_destroy_id(&dev_id_priv->id);
854 static void cma_cancel_operation(struct rdma_id_private *id_priv,
855 enum rdma_cm_state state)
858 case RDMA_CM_ADDR_QUERY:
859 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
861 case RDMA_CM_ROUTE_QUERY:
862 cma_cancel_route(id_priv);
865 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
866 && !id_priv->cma_dev)
867 cma_cancel_listens(id_priv);
874 static void cma_release_port(struct rdma_id_private *id_priv)
876 struct rdma_bind_list *bind_list = id_priv->bind_list;
882 hlist_del(&id_priv->node);
883 if (hlist_empty(&bind_list->owners)) {
884 idr_remove(bind_list->ps, bind_list->port);
890 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
892 struct cma_multicast *mc;
894 while (!list_empty(&id_priv->mc_list)) {
895 mc = container_of(id_priv->mc_list.next,
896 struct cma_multicast, list);
898 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
899 case IB_LINK_LAYER_INFINIBAND:
900 ib_sa_free_multicast(mc->multicast.ib);
903 case IB_LINK_LAYER_ETHERNET:
904 kref_put(&mc->mcref, release_mc);
912 void rdma_destroy_id(struct rdma_cm_id *id)
914 struct rdma_id_private *id_priv;
915 enum rdma_cm_state state;
917 id_priv = container_of(id, struct rdma_id_private, id);
918 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
919 cma_cancel_operation(id_priv, state);
922 * Wait for any active callback to finish. New callbacks will find
923 * the id_priv state set to destroying and abort.
925 mutex_lock(&id_priv->handler_mutex);
926 mutex_unlock(&id_priv->handler_mutex);
928 if (id_priv->cma_dev) {
929 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
930 case RDMA_TRANSPORT_IB:
931 if (id_priv->cm_id.ib)
932 ib_destroy_cm_id(id_priv->cm_id.ib);
934 case RDMA_TRANSPORT_IWARP:
935 if (id_priv->cm_id.iw)
936 iw_destroy_cm_id(id_priv->cm_id.iw);
941 cma_leave_mc_groups(id_priv);
942 cma_release_dev(id_priv);
945 cma_release_port(id_priv);
946 cma_deref_id(id_priv);
947 wait_for_completion(&id_priv->comp);
949 if (id_priv->internal_id)
950 cma_deref_id(id_priv->id.context);
952 kfree(id_priv->id.route.path_rec);
955 EXPORT_SYMBOL(rdma_destroy_id);
957 static int cma_rep_recv(struct rdma_id_private *id_priv)
961 ret = cma_modify_qp_rtr(id_priv, NULL);
965 ret = cma_modify_qp_rts(id_priv, NULL);
969 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
975 cma_modify_qp_err(id_priv);
976 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
981 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
983 if (id_priv->id.ps == RDMA_PS_SDP &&
984 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
991 static void cma_set_rep_event_data(struct rdma_cm_event *event,
992 struct ib_cm_rep_event_param *rep_data,
995 event->param.conn.private_data = private_data;
996 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
997 event->param.conn.responder_resources = rep_data->responder_resources;
998 event->param.conn.initiator_depth = rep_data->initiator_depth;
999 event->param.conn.flow_control = rep_data->flow_control;
1000 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1001 event->param.conn.srq = rep_data->srq;
1002 event->param.conn.qp_num = rep_data->remote_qpn;
1005 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1007 struct rdma_id_private *id_priv = cm_id->context;
1008 struct rdma_cm_event event;
1011 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1012 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1013 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1014 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1017 memset(&event, 0, sizeof event);
1018 switch (ib_event->event) {
1019 case IB_CM_REQ_ERROR:
1020 case IB_CM_REP_ERROR:
1021 event.event = RDMA_CM_EVENT_UNREACHABLE;
1022 event.status = -ETIMEDOUT;
1024 case IB_CM_REP_RECEIVED:
1025 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1027 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1028 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
1029 event.status = cma_rep_recv(id_priv);
1030 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1031 RDMA_CM_EVENT_ESTABLISHED;
1033 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1034 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1035 ib_event->private_data);
1037 case IB_CM_RTU_RECEIVED:
1038 case IB_CM_USER_ESTABLISHED:
1039 event.event = RDMA_CM_EVENT_ESTABLISHED;
1041 case IB_CM_DREQ_ERROR:
1042 event.status = -ETIMEDOUT; /* fall through */
1043 case IB_CM_DREQ_RECEIVED:
1044 case IB_CM_DREP_RECEIVED:
1045 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1046 RDMA_CM_DISCONNECT))
1048 event.event = RDMA_CM_EVENT_DISCONNECTED;
1050 case IB_CM_TIMEWAIT_EXIT:
1051 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1053 case IB_CM_MRA_RECEIVED:
1056 case IB_CM_REJ_RECEIVED:
1057 cma_modify_qp_err(id_priv);
1058 event.status = ib_event->param.rej_rcvd.reason;
1059 event.event = RDMA_CM_EVENT_REJECTED;
1060 event.param.conn.private_data = ib_event->private_data;
1061 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1064 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1069 ret = id_priv->id.event_handler(&id_priv->id, &event);
1071 /* Destroy the CM ID by returning a non-zero value. */
1072 id_priv->cm_id.ib = NULL;
1073 cma_exch(id_priv, RDMA_CM_DESTROYING);
1074 mutex_unlock(&id_priv->handler_mutex);
1075 rdma_destroy_id(&id_priv->id);
1079 mutex_unlock(&id_priv->handler_mutex);
1083 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1084 struct ib_cm_event *ib_event)
1086 struct rdma_id_private *id_priv;
1087 struct rdma_cm_id *id;
1088 struct rdma_route *rt;
1089 union cma_ip_addr *src, *dst;
1094 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1095 &ip_ver, &port, &src, &dst))
1098 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1099 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1103 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1104 ip_ver, port, src, dst);
1107 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1108 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1113 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1114 if (rt->num_paths == 2)
1115 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1117 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1118 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1119 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1120 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1122 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1123 &rt->addr.dev_addr);
1127 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1129 id_priv = container_of(id, struct rdma_id_private, id);
1130 id_priv->state = RDMA_CM_CONNECT;
1134 rdma_destroy_id(id);
1138 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1139 struct ib_cm_event *ib_event)
1141 struct rdma_id_private *id_priv;
1142 struct rdma_cm_id *id;
1143 union cma_ip_addr *src, *dst;
1148 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1149 listen_id->ps, IB_QPT_UD);
1154 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1155 &ip_ver, &port, &src, &dst))
1158 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1159 ip_ver, port, src, dst);
1161 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1162 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1163 &id->route.addr.dev_addr);
1168 id_priv = container_of(id, struct rdma_id_private, id);
1169 id_priv->state = RDMA_CM_CONNECT;
1172 rdma_destroy_id(id);
1176 static void cma_set_req_event_data(struct rdma_cm_event *event,
1177 struct ib_cm_req_event_param *req_data,
1178 void *private_data, int offset)
1180 event->param.conn.private_data = private_data + offset;
1181 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1182 event->param.conn.responder_resources = req_data->responder_resources;
1183 event->param.conn.initiator_depth = req_data->initiator_depth;
1184 event->param.conn.flow_control = req_data->flow_control;
1185 event->param.conn.retry_count = req_data->retry_count;
1186 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1187 event->param.conn.srq = req_data->srq;
1188 event->param.conn.qp_num = req_data->remote_qpn;
1191 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1193 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1194 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1195 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1196 (id->qp_type == IB_QPT_UD)) ||
1200 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1202 struct rdma_id_private *listen_id, *conn_id;
1203 struct rdma_cm_event event;
1206 listen_id = cm_id->context;
1207 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1210 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1211 return -ECONNABORTED;
1213 memset(&event, 0, sizeof event);
1214 offset = cma_user_data_offset(listen_id->id.ps);
1215 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1216 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1217 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1218 event.param.ud.private_data = ib_event->private_data + offset;
1219 event.param.ud.private_data_len =
1220 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1222 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1223 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1224 ib_event->private_data, offset);
1231 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1232 ret = cma_acquire_dev(conn_id);
1236 conn_id->cm_id.ib = cm_id;
1237 cm_id->context = conn_id;
1238 cm_id->cm_handler = cma_ib_handler;
1241 * Protect against the user destroying conn_id from another thread
1242 * until we're done accessing it.
1244 atomic_inc(&conn_id->refcount);
1245 ret = conn_id->id.event_handler(&conn_id->id, &event);
1250 * Acquire mutex to prevent user executing rdma_destroy_id()
1251 * while we're accessing the cm_id.
1254 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1255 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1256 mutex_unlock(&lock);
1257 mutex_unlock(&conn_id->handler_mutex);
1258 mutex_unlock(&listen_id->handler_mutex);
1259 cma_deref_id(conn_id);
1263 cma_deref_id(conn_id);
1264 /* Destroy the CM ID by returning a non-zero value. */
1265 conn_id->cm_id.ib = NULL;
1267 cma_exch(conn_id, RDMA_CM_DESTROYING);
1268 mutex_unlock(&conn_id->handler_mutex);
1270 mutex_unlock(&listen_id->handler_mutex);
1272 rdma_destroy_id(&conn_id->id);
1276 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1278 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1281 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1282 struct ib_cm_compare_data *compare)
1284 struct cma_hdr *cma_data, *cma_mask;
1285 struct sdp_hh *sdp_data, *sdp_mask;
1287 struct in6_addr ip6_addr;
1289 memset(compare, 0, sizeof *compare);
1290 cma_data = (void *) compare->data;
1291 cma_mask = (void *) compare->mask;
1292 sdp_data = (void *) compare->data;
1293 sdp_mask = (void *) compare->mask;
1295 switch (addr->sa_family) {
1297 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1298 if (ps == RDMA_PS_SDP) {
1299 sdp_set_ip_ver(sdp_data, 4);
1300 sdp_set_ip_ver(sdp_mask, 0xF);
1301 sdp_data->dst_addr.ip4.addr = ip4_addr;
1302 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1304 cma_set_ip_ver(cma_data, 4);
1305 cma_set_ip_ver(cma_mask, 0xF);
1306 if (!cma_any_addr(addr)) {
1307 cma_data->dst_addr.ip4.addr = ip4_addr;
1308 cma_mask->dst_addr.ip4.addr = htonl(~0);
1313 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1314 if (ps == RDMA_PS_SDP) {
1315 sdp_set_ip_ver(sdp_data, 6);
1316 sdp_set_ip_ver(sdp_mask, 0xF);
1317 sdp_data->dst_addr.ip6 = ip6_addr;
1318 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1319 sizeof sdp_mask->dst_addr.ip6);
1321 cma_set_ip_ver(cma_data, 6);
1322 cma_set_ip_ver(cma_mask, 0xF);
1323 if (!cma_any_addr(addr)) {
1324 cma_data->dst_addr.ip6 = ip6_addr;
1325 memset(&cma_mask->dst_addr.ip6, 0xFF,
1326 sizeof cma_mask->dst_addr.ip6);
1335 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1337 struct rdma_id_private *id_priv = iw_id->context;
1338 struct rdma_cm_event event;
1339 struct sockaddr_in *sin;
1342 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1345 memset(&event, 0, sizeof event);
1346 switch (iw_event->event) {
1347 case IW_CM_EVENT_CLOSE:
1348 event.event = RDMA_CM_EVENT_DISCONNECTED;
1350 case IW_CM_EVENT_CONNECT_REPLY:
1351 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1352 *sin = iw_event->local_addr;
1353 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1354 *sin = iw_event->remote_addr;
1355 switch (iw_event->status) {
1357 event.event = RDMA_CM_EVENT_ESTABLISHED;
1358 event.param.conn.initiator_depth = iw_event->ird;
1359 event.param.conn.responder_resources = iw_event->ord;
1363 event.event = RDMA_CM_EVENT_REJECTED;
1366 event.event = RDMA_CM_EVENT_UNREACHABLE;
1369 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1373 case IW_CM_EVENT_ESTABLISHED:
1374 event.event = RDMA_CM_EVENT_ESTABLISHED;
1375 event.param.conn.initiator_depth = iw_event->ird;
1376 event.param.conn.responder_resources = iw_event->ord;
1382 event.status = iw_event->status;
1383 event.param.conn.private_data = iw_event->private_data;
1384 event.param.conn.private_data_len = iw_event->private_data_len;
1385 ret = id_priv->id.event_handler(&id_priv->id, &event);
1387 /* Destroy the CM ID by returning a non-zero value. */
1388 id_priv->cm_id.iw = NULL;
1389 cma_exch(id_priv, RDMA_CM_DESTROYING);
1390 mutex_unlock(&id_priv->handler_mutex);
1391 rdma_destroy_id(&id_priv->id);
1395 mutex_unlock(&id_priv->handler_mutex);
1399 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1400 struct iw_cm_event *iw_event)
1402 struct rdma_cm_id *new_cm_id;
1403 struct rdma_id_private *listen_id, *conn_id;
1404 struct sockaddr_in *sin;
1405 struct net_device *dev = NULL;
1406 struct rdma_cm_event event;
1408 struct ib_device_attr attr;
1410 listen_id = cm_id->context;
1411 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1412 return -ECONNABORTED;
1414 /* Create a new RDMA id for the new IW CM ID */
1415 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1416 listen_id->id.context,
1417 RDMA_PS_TCP, IB_QPT_RC);
1418 if (IS_ERR(new_cm_id)) {
1422 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1423 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1424 conn_id->state = RDMA_CM_CONNECT;
1426 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1428 ret = -EADDRNOTAVAIL;
1429 mutex_unlock(&conn_id->handler_mutex);
1430 rdma_destroy_id(new_cm_id);
1433 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1435 mutex_unlock(&conn_id->handler_mutex);
1436 rdma_destroy_id(new_cm_id);
1440 ret = cma_acquire_dev(conn_id);
1442 mutex_unlock(&conn_id->handler_mutex);
1443 rdma_destroy_id(new_cm_id);
1447 conn_id->cm_id.iw = cm_id;
1448 cm_id->context = conn_id;
1449 cm_id->cm_handler = cma_iw_handler;
1451 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1452 *sin = iw_event->local_addr;
1453 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1454 *sin = iw_event->remote_addr;
1456 ret = ib_query_device(conn_id->id.device, &attr);
1458 mutex_unlock(&conn_id->handler_mutex);
1459 rdma_destroy_id(new_cm_id);
1463 memset(&event, 0, sizeof event);
1464 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1465 event.param.conn.private_data = iw_event->private_data;
1466 event.param.conn.private_data_len = iw_event->private_data_len;
1467 event.param.conn.initiator_depth = iw_event->ird;
1468 event.param.conn.responder_resources = iw_event->ord;
1471 * Protect against the user destroying conn_id from another thread
1472 * until we're done accessing it.
1474 atomic_inc(&conn_id->refcount);
1475 ret = conn_id->id.event_handler(&conn_id->id, &event);
1477 /* User wants to destroy the CM ID */
1478 conn_id->cm_id.iw = NULL;
1479 cma_exch(conn_id, RDMA_CM_DESTROYING);
1480 mutex_unlock(&conn_id->handler_mutex);
1481 cma_deref_id(conn_id);
1482 rdma_destroy_id(&conn_id->id);
1486 mutex_unlock(&conn_id->handler_mutex);
1487 cma_deref_id(conn_id);
1492 mutex_unlock(&listen_id->handler_mutex);
1496 static int cma_ib_listen(struct rdma_id_private *id_priv)
1498 struct ib_cm_compare_data compare_data;
1499 struct sockaddr *addr;
1500 struct ib_cm_id *id;
1504 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1508 id_priv->cm_id.ib = id;
1510 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1511 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1512 if (cma_any_addr(addr) && !id_priv->afonly)
1513 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1515 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1516 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1520 ib_destroy_cm_id(id_priv->cm_id.ib);
1521 id_priv->cm_id.ib = NULL;
1527 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1530 struct sockaddr_in *sin;
1531 struct iw_cm_id *id;
1533 id = iw_create_cm_id(id_priv->id.device,
1534 iw_conn_req_handler,
1539 id_priv->cm_id.iw = id;
1541 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1542 id_priv->cm_id.iw->local_addr = *sin;
1544 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1547 iw_destroy_cm_id(id_priv->cm_id.iw);
1548 id_priv->cm_id.iw = NULL;
1554 static int cma_listen_handler(struct rdma_cm_id *id,
1555 struct rdma_cm_event *event)
1557 struct rdma_id_private *id_priv = id->context;
1559 id->context = id_priv->id.context;
1560 id->event_handler = id_priv->id.event_handler;
1561 return id_priv->id.event_handler(id, event);
1564 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1565 struct cma_device *cma_dev)
1567 struct rdma_id_private *dev_id_priv;
1568 struct rdma_cm_id *id;
1571 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1572 id_priv->id.qp_type);
1576 dev_id_priv = container_of(id, struct rdma_id_private, id);
1578 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1579 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1580 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1582 cma_attach_to_dev(dev_id_priv, cma_dev);
1583 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1584 atomic_inc(&id_priv->refcount);
1585 dev_id_priv->internal_id = 1;
1586 dev_id_priv->afonly = id_priv->afonly;
1588 ret = rdma_listen(id, id_priv->backlog);
1590 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1591 "listening on device %s\n", ret, cma_dev->device->name);
1594 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1596 struct cma_device *cma_dev;
1599 list_add_tail(&id_priv->list, &listen_any_list);
1600 list_for_each_entry(cma_dev, &dev_list, list)
1601 cma_listen_on_dev(id_priv, cma_dev);
1602 mutex_unlock(&lock);
1605 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1607 struct rdma_id_private *id_priv;
1609 id_priv = container_of(id, struct rdma_id_private, id);
1610 id_priv->tos = (u8) tos;
1612 EXPORT_SYMBOL(rdma_set_service_type);
1614 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1617 struct cma_work *work = context;
1618 struct rdma_route *route;
1620 route = &work->id->id.route;
1623 route->num_paths = 1;
1624 *route->path_rec = *path_rec;
1626 work->old_state = RDMA_CM_ROUTE_QUERY;
1627 work->new_state = RDMA_CM_ADDR_RESOLVED;
1628 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1629 work->event.status = status;
1632 queue_work(cma_wq, &work->work);
1635 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1636 struct cma_work *work)
1638 struct rdma_addr *addr = &id_priv->id.route.addr;
1639 struct ib_sa_path_rec path_rec;
1640 ib_sa_comp_mask comp_mask;
1641 struct sockaddr_in6 *sin6;
1643 memset(&path_rec, 0, sizeof path_rec);
1644 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1645 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1646 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1647 path_rec.numb_path = 1;
1648 path_rec.reversible = 1;
1649 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1650 (struct sockaddr *) &addr->dst_addr);
1652 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1653 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1654 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1656 if (addr->src_addr.ss_family == AF_INET) {
1657 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1658 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1660 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1661 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1662 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1665 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1666 id_priv->id.port_num, &path_rec,
1667 comp_mask, timeout_ms,
1668 GFP_KERNEL, cma_query_handler,
1669 work, &id_priv->query);
1671 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1674 static void cma_work_handler(struct work_struct *_work)
1676 struct cma_work *work = container_of(_work, struct cma_work, work);
1677 struct rdma_id_private *id_priv = work->id;
1680 mutex_lock(&id_priv->handler_mutex);
1681 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1684 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1685 cma_exch(id_priv, RDMA_CM_DESTROYING);
1689 mutex_unlock(&id_priv->handler_mutex);
1690 cma_deref_id(id_priv);
1692 rdma_destroy_id(&id_priv->id);
1696 static void cma_ndev_work_handler(struct work_struct *_work)
1698 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1699 struct rdma_id_private *id_priv = work->id;
1702 mutex_lock(&id_priv->handler_mutex);
1703 if (id_priv->state == RDMA_CM_DESTROYING ||
1704 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1707 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1708 cma_exch(id_priv, RDMA_CM_DESTROYING);
1713 mutex_unlock(&id_priv->handler_mutex);
1714 cma_deref_id(id_priv);
1716 rdma_destroy_id(&id_priv->id);
1720 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1722 struct rdma_route *route = &id_priv->id.route;
1723 struct cma_work *work;
1726 work = kzalloc(sizeof *work, GFP_KERNEL);
1731 INIT_WORK(&work->work, cma_work_handler);
1732 work->old_state = RDMA_CM_ROUTE_QUERY;
1733 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1734 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1736 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1737 if (!route->path_rec) {
1742 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1748 kfree(route->path_rec);
1749 route->path_rec = NULL;
1755 int rdma_set_ib_paths(struct rdma_cm_id *id,
1756 struct ib_sa_path_rec *path_rec, int num_paths)
1758 struct rdma_id_private *id_priv;
1761 id_priv = container_of(id, struct rdma_id_private, id);
1762 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1763 RDMA_CM_ROUTE_RESOLVED))
1766 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1768 if (!id->route.path_rec) {
1773 id->route.num_paths = num_paths;
1776 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1779 EXPORT_SYMBOL(rdma_set_ib_paths);
1781 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1783 struct cma_work *work;
1785 work = kzalloc(sizeof *work, GFP_KERNEL);
1790 INIT_WORK(&work->work, cma_work_handler);
1791 work->old_state = RDMA_CM_ROUTE_QUERY;
1792 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1793 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1794 queue_work(cma_wq, &work->work);
1798 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1800 struct rdma_route *route = &id_priv->id.route;
1801 struct rdma_addr *addr = &route->addr;
1802 struct cma_work *work;
1804 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1805 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1806 struct net_device *ndev = NULL;
1809 if (src_addr->sin_family != dst_addr->sin_family)
1812 work = kzalloc(sizeof *work, GFP_KERNEL);
1817 INIT_WORK(&work->work, cma_work_handler);
1819 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1820 if (!route->path_rec) {
1825 route->num_paths = 1;
1827 if (addr->dev_addr.bound_dev_if)
1828 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1834 vid = rdma_vlan_dev_vlan_id(ndev);
1836 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1837 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1839 route->path_rec->hop_limit = 1;
1840 route->path_rec->reversible = 1;
1841 route->path_rec->pkey = cpu_to_be16(0xffff);
1842 route->path_rec->mtu_selector = IB_SA_EQ;
1843 route->path_rec->sl = netdev_get_prio_tc_map(
1844 ndev->priv_flags & IFF_802_1Q_VLAN ?
1845 vlan_dev_real_dev(ndev) : ndev,
1846 rt_tos2priority(id_priv->tos));
1848 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1849 route->path_rec->rate_selector = IB_SA_EQ;
1850 route->path_rec->rate = iboe_get_rate(ndev);
1852 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1853 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1854 if (!route->path_rec->mtu) {
1859 work->old_state = RDMA_CM_ROUTE_QUERY;
1860 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1861 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1862 work->event.status = 0;
1864 queue_work(cma_wq, &work->work);
1869 kfree(route->path_rec);
1870 route->path_rec = NULL;
1876 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1878 struct rdma_id_private *id_priv;
1881 id_priv = container_of(id, struct rdma_id_private, id);
1882 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1885 atomic_inc(&id_priv->refcount);
1886 switch (rdma_node_get_transport(id->device->node_type)) {
1887 case RDMA_TRANSPORT_IB:
1888 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1889 case IB_LINK_LAYER_INFINIBAND:
1890 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1892 case IB_LINK_LAYER_ETHERNET:
1893 ret = cma_resolve_iboe_route(id_priv);
1899 case RDMA_TRANSPORT_IWARP:
1900 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1911 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1912 cma_deref_id(id_priv);
1915 EXPORT_SYMBOL(rdma_resolve_route);
1917 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1919 struct cma_device *cma_dev;
1920 struct ib_port_attr port_attr;
1927 if (list_empty(&dev_list)) {
1931 list_for_each_entry(cma_dev, &dev_list, list)
1932 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1933 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1934 port_attr.state == IB_PORT_ACTIVE)
1938 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1941 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1945 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1949 id_priv->id.route.addr.dev_addr.dev_type =
1950 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1951 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1953 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1954 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1955 id_priv->id.port_num = p;
1956 cma_attach_to_dev(id_priv, cma_dev);
1958 mutex_unlock(&lock);
1962 static void addr_handler(int status, struct sockaddr *src_addr,
1963 struct rdma_dev_addr *dev_addr, void *context)
1965 struct rdma_id_private *id_priv = context;
1966 struct rdma_cm_event event;
1968 memset(&event, 0, sizeof event);
1969 mutex_lock(&id_priv->handler_mutex);
1970 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
1971 RDMA_CM_ADDR_RESOLVED))
1974 if (!status && !id_priv->cma_dev)
1975 status = cma_acquire_dev(id_priv);
1978 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1979 RDMA_CM_ADDR_BOUND))
1981 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1982 event.status = status;
1984 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1985 ip_addr_size(src_addr));
1986 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1989 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1990 cma_exch(id_priv, RDMA_CM_DESTROYING);
1991 mutex_unlock(&id_priv->handler_mutex);
1992 cma_deref_id(id_priv);
1993 rdma_destroy_id(&id_priv->id);
1997 mutex_unlock(&id_priv->handler_mutex);
1998 cma_deref_id(id_priv);
2001 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2003 struct cma_work *work;
2004 struct sockaddr *src, *dst;
2008 work = kzalloc(sizeof *work, GFP_KERNEL);
2012 if (!id_priv->cma_dev) {
2013 ret = cma_bind_loopback(id_priv);
2018 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2019 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2021 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2022 if (cma_zero_addr(src)) {
2023 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2024 if ((src->sa_family = dst->sa_family) == AF_INET) {
2025 ((struct sockaddr_in *)src)->sin_addr =
2026 ((struct sockaddr_in *)dst)->sin_addr;
2028 ((struct sockaddr_in6 *)src)->sin6_addr =
2029 ((struct sockaddr_in6 *)dst)->sin6_addr;
2034 INIT_WORK(&work->work, cma_work_handler);
2035 work->old_state = RDMA_CM_ADDR_QUERY;
2036 work->new_state = RDMA_CM_ADDR_RESOLVED;
2037 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2038 queue_work(cma_wq, &work->work);
2045 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2046 struct sockaddr *dst_addr)
2048 if (!src_addr || !src_addr->sa_family) {
2049 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2050 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2051 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2052 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2055 return rdma_bind_addr(id, src_addr);
2058 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2059 struct sockaddr *dst_addr, int timeout_ms)
2061 struct rdma_id_private *id_priv;
2064 id_priv = container_of(id, struct rdma_id_private, id);
2065 if (id_priv->state == RDMA_CM_IDLE) {
2066 ret = cma_bind_addr(id, src_addr, dst_addr);
2071 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2074 atomic_inc(&id_priv->refcount);
2075 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2076 if (cma_any_addr(dst_addr))
2077 ret = cma_resolve_loopback(id_priv);
2079 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2080 dst_addr, &id->route.addr.dev_addr,
2081 timeout_ms, addr_handler, id_priv);
2087 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2088 cma_deref_id(id_priv);
2091 EXPORT_SYMBOL(rdma_resolve_addr);
2093 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2095 struct rdma_id_private *id_priv;
2096 unsigned long flags;
2099 id_priv = container_of(id, struct rdma_id_private, id);
2100 spin_lock_irqsave(&id_priv->lock, flags);
2101 if (id_priv->state == RDMA_CM_IDLE) {
2102 id_priv->reuseaddr = reuse;
2107 spin_unlock_irqrestore(&id_priv->lock, flags);
2110 EXPORT_SYMBOL(rdma_set_reuseaddr);
2112 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2114 struct rdma_id_private *id_priv;
2115 unsigned long flags;
2118 id_priv = container_of(id, struct rdma_id_private, id);
2119 spin_lock_irqsave(&id_priv->lock, flags);
2120 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2121 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2122 id_priv->afonly = afonly;
2127 spin_unlock_irqrestore(&id_priv->lock, flags);
2130 EXPORT_SYMBOL(rdma_set_afonly);
2132 static void cma_bind_port(struct rdma_bind_list *bind_list,
2133 struct rdma_id_private *id_priv)
2135 struct sockaddr_in *sin;
2137 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2138 sin->sin_port = htons(bind_list->port);
2139 id_priv->bind_list = bind_list;
2140 hlist_add_head(&id_priv->node, &bind_list->owners);
2143 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2144 unsigned short snum)
2146 struct rdma_bind_list *bind_list;
2149 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2154 ret = idr_get_new_above(ps, bind_list, snum, &port);
2155 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2161 ret = -EADDRNOTAVAIL;
2166 bind_list->port = (unsigned short) port;
2167 cma_bind_port(bind_list, id_priv);
2170 idr_remove(ps, port);
2176 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2178 static unsigned int last_used_port;
2179 int low, high, remaining;
2182 inet_get_local_port_range(&low, &high);
2183 remaining = (high - low) + 1;
2184 rover = net_random() % remaining + low;
2186 if (last_used_port != rover &&
2187 !idr_find(ps, (unsigned short) rover)) {
2188 int ret = cma_alloc_port(ps, id_priv, rover);
2190 * Remember previously used port number in order to avoid
2191 * re-using same port immediately after it is closed.
2194 last_used_port = rover;
2195 if (ret != -EADDRNOTAVAIL)
2200 if ((rover < low) || (rover > high))
2204 return -EADDRNOTAVAIL;
2208 * Check that the requested port is available. This is called when trying to
2209 * bind to a specific port, or when trying to listen on a bound port. In
2210 * the latter case, the provided id_priv may already be on the bind_list, but
2211 * we still need to check that it's okay to start listening.
2213 static int cma_check_port(struct rdma_bind_list *bind_list,
2214 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2216 struct rdma_id_private *cur_id;
2217 struct sockaddr *addr, *cur_addr;
2218 struct hlist_node *node;
2220 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2221 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2222 if (id_priv == cur_id)
2225 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2229 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2230 if (id_priv->afonly && cur_id->afonly &&
2231 (addr->sa_family != cur_addr->sa_family))
2234 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2235 return -EADDRNOTAVAIL;
2237 if (!cma_addr_cmp(addr, cur_addr))
2243 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2245 struct rdma_bind_list *bind_list;
2246 unsigned short snum;
2249 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2250 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2253 bind_list = idr_find(ps, snum);
2255 ret = cma_alloc_port(ps, id_priv, snum);
2257 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2259 cma_bind_port(bind_list, id_priv);
2264 static int cma_bind_listen(struct rdma_id_private *id_priv)
2266 struct rdma_bind_list *bind_list = id_priv->bind_list;
2270 if (bind_list->owners.first->next)
2271 ret = cma_check_port(bind_list, id_priv, 0);
2272 mutex_unlock(&lock);
2276 static int cma_get_port(struct rdma_id_private *id_priv)
2281 switch (id_priv->id.ps) {
2298 return -EPROTONOSUPPORT;
2302 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2303 ret = cma_alloc_any_port(ps, id_priv);
2305 ret = cma_use_port(ps, id_priv);
2306 mutex_unlock(&lock);
2311 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2312 struct sockaddr *addr)
2314 #if IS_ENABLED(CONFIG_IPV6)
2315 struct sockaddr_in6 *sin6;
2317 if (addr->sa_family != AF_INET6)
2320 sin6 = (struct sockaddr_in6 *) addr;
2321 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2322 !sin6->sin6_scope_id)
2325 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2330 int rdma_listen(struct rdma_cm_id *id, int backlog)
2332 struct rdma_id_private *id_priv;
2335 id_priv = container_of(id, struct rdma_id_private, id);
2336 if (id_priv->state == RDMA_CM_IDLE) {
2337 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2338 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2343 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2346 if (id_priv->reuseaddr) {
2347 ret = cma_bind_listen(id_priv);
2352 id_priv->backlog = backlog;
2354 switch (rdma_node_get_transport(id->device->node_type)) {
2355 case RDMA_TRANSPORT_IB:
2356 ret = cma_ib_listen(id_priv);
2360 case RDMA_TRANSPORT_IWARP:
2361 ret = cma_iw_listen(id_priv, backlog);
2370 cma_listen_on_all(id_priv);
2374 id_priv->backlog = 0;
2375 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2378 EXPORT_SYMBOL(rdma_listen);
2380 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2382 struct rdma_id_private *id_priv;
2385 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2386 return -EAFNOSUPPORT;
2388 id_priv = container_of(id, struct rdma_id_private, id);
2389 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2392 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2396 if (!cma_any_addr(addr)) {
2397 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2401 ret = cma_acquire_dev(id_priv);
2406 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2407 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2408 if (addr->sa_family == AF_INET)
2409 id_priv->afonly = 1;
2410 #if IS_ENABLED(CONFIG_IPV6)
2411 else if (addr->sa_family == AF_INET6)
2412 id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
2415 ret = cma_get_port(id_priv);
2421 if (id_priv->cma_dev)
2422 cma_release_dev(id_priv);
2424 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2427 EXPORT_SYMBOL(rdma_bind_addr);
2429 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2430 struct rdma_route *route)
2432 struct cma_hdr *cma_hdr;
2433 struct sdp_hh *sdp_hdr;
2435 if (route->addr.src_addr.ss_family == AF_INET) {
2436 struct sockaddr_in *src4, *dst4;
2438 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2439 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2444 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2446 sdp_set_ip_ver(sdp_hdr, 4);
2447 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2448 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2449 sdp_hdr->port = src4->sin_port;
2453 cma_hdr->cma_version = CMA_VERSION;
2454 cma_set_ip_ver(cma_hdr, 4);
2455 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2456 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2457 cma_hdr->port = src4->sin_port;
2461 struct sockaddr_in6 *src6, *dst6;
2463 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2464 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2469 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2471 sdp_set_ip_ver(sdp_hdr, 6);
2472 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2473 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2474 sdp_hdr->port = src6->sin6_port;
2478 cma_hdr->cma_version = CMA_VERSION;
2479 cma_set_ip_ver(cma_hdr, 6);
2480 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2481 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2482 cma_hdr->port = src6->sin6_port;
2489 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2490 struct ib_cm_event *ib_event)
2492 struct rdma_id_private *id_priv = cm_id->context;
2493 struct rdma_cm_event event;
2494 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2497 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2500 memset(&event, 0, sizeof event);
2501 switch (ib_event->event) {
2502 case IB_CM_SIDR_REQ_ERROR:
2503 event.event = RDMA_CM_EVENT_UNREACHABLE;
2504 event.status = -ETIMEDOUT;
2506 case IB_CM_SIDR_REP_RECEIVED:
2507 event.param.ud.private_data = ib_event->private_data;
2508 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2509 if (rep->status != IB_SIDR_SUCCESS) {
2510 event.event = RDMA_CM_EVENT_UNREACHABLE;
2511 event.status = ib_event->param.sidr_rep_rcvd.status;
2514 ret = cma_set_qkey(id_priv);
2516 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2517 event.status = -EINVAL;
2520 if (id_priv->qkey != rep->qkey) {
2521 event.event = RDMA_CM_EVENT_UNREACHABLE;
2522 event.status = -EINVAL;
2525 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2526 id_priv->id.route.path_rec,
2527 &event.param.ud.ah_attr);
2528 event.param.ud.qp_num = rep->qpn;
2529 event.param.ud.qkey = rep->qkey;
2530 event.event = RDMA_CM_EVENT_ESTABLISHED;
2534 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2539 ret = id_priv->id.event_handler(&id_priv->id, &event);
2541 /* Destroy the CM ID by returning a non-zero value. */
2542 id_priv->cm_id.ib = NULL;
2543 cma_exch(id_priv, RDMA_CM_DESTROYING);
2544 mutex_unlock(&id_priv->handler_mutex);
2545 rdma_destroy_id(&id_priv->id);
2549 mutex_unlock(&id_priv->handler_mutex);
2553 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2554 struct rdma_conn_param *conn_param)
2556 struct ib_cm_sidr_req_param req;
2557 struct rdma_route *route;
2558 struct ib_cm_id *id;
2561 req.private_data_len = sizeof(struct cma_hdr) +
2562 conn_param->private_data_len;
2563 if (req.private_data_len < conn_param->private_data_len)
2566 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2567 if (!req.private_data)
2570 if (conn_param->private_data && conn_param->private_data_len)
2571 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2572 conn_param->private_data, conn_param->private_data_len);
2574 route = &id_priv->id.route;
2575 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2579 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2585 id_priv->cm_id.ib = id;
2587 req.path = route->path_rec;
2588 req.service_id = cma_get_service_id(id_priv->id.ps,
2589 (struct sockaddr *) &route->addr.dst_addr);
2590 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2591 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2593 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2595 ib_destroy_cm_id(id_priv->cm_id.ib);
2596 id_priv->cm_id.ib = NULL;
2599 kfree(req.private_data);
2603 static int cma_connect_ib(struct rdma_id_private *id_priv,
2604 struct rdma_conn_param *conn_param)
2606 struct ib_cm_req_param req;
2607 struct rdma_route *route;
2609 struct ib_cm_id *id;
2612 memset(&req, 0, sizeof req);
2613 offset = cma_user_data_offset(id_priv->id.ps);
2614 req.private_data_len = offset + conn_param->private_data_len;
2615 if (req.private_data_len < conn_param->private_data_len)
2618 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2622 if (conn_param->private_data && conn_param->private_data_len)
2623 memcpy(private_data + offset, conn_param->private_data,
2624 conn_param->private_data_len);
2626 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2631 id_priv->cm_id.ib = id;
2633 route = &id_priv->id.route;
2634 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2637 req.private_data = private_data;
2639 req.primary_path = &route->path_rec[0];
2640 if (route->num_paths == 2)
2641 req.alternate_path = &route->path_rec[1];
2643 req.service_id = cma_get_service_id(id_priv->id.ps,
2644 (struct sockaddr *) &route->addr.dst_addr);
2645 req.qp_num = id_priv->qp_num;
2646 req.qp_type = id_priv->id.qp_type;
2647 req.starting_psn = id_priv->seq_num;
2648 req.responder_resources = conn_param->responder_resources;
2649 req.initiator_depth = conn_param->initiator_depth;
2650 req.flow_control = conn_param->flow_control;
2651 req.retry_count = min_t(u8, 7, conn_param->retry_count);
2652 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2653 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2654 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2655 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2656 req.srq = id_priv->srq ? 1 : 0;
2658 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2660 if (ret && !IS_ERR(id)) {
2661 ib_destroy_cm_id(id);
2662 id_priv->cm_id.ib = NULL;
2665 kfree(private_data);
2669 static int cma_connect_iw(struct rdma_id_private *id_priv,
2670 struct rdma_conn_param *conn_param)
2672 struct iw_cm_id *cm_id;
2673 struct sockaddr_in* sin;
2675 struct iw_cm_conn_param iw_param;
2677 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2679 return PTR_ERR(cm_id);
2681 id_priv->cm_id.iw = cm_id;
2683 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2684 cm_id->local_addr = *sin;
2686 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2687 cm_id->remote_addr = *sin;
2689 ret = cma_modify_qp_rtr(id_priv, conn_param);
2694 iw_param.ord = conn_param->initiator_depth;
2695 iw_param.ird = conn_param->responder_resources;
2696 iw_param.private_data = conn_param->private_data;
2697 iw_param.private_data_len = conn_param->private_data_len;
2698 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2700 memset(&iw_param, 0, sizeof iw_param);
2701 iw_param.qpn = id_priv->qp_num;
2703 ret = iw_cm_connect(cm_id, &iw_param);
2706 iw_destroy_cm_id(cm_id);
2707 id_priv->cm_id.iw = NULL;
2712 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2714 struct rdma_id_private *id_priv;
2717 id_priv = container_of(id, struct rdma_id_private, id);
2718 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2722 id_priv->qp_num = conn_param->qp_num;
2723 id_priv->srq = conn_param->srq;
2726 switch (rdma_node_get_transport(id->device->node_type)) {
2727 case RDMA_TRANSPORT_IB:
2728 if (id->qp_type == IB_QPT_UD)
2729 ret = cma_resolve_ib_udp(id_priv, conn_param);
2731 ret = cma_connect_ib(id_priv, conn_param);
2733 case RDMA_TRANSPORT_IWARP:
2734 ret = cma_connect_iw(id_priv, conn_param);
2745 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2748 EXPORT_SYMBOL(rdma_connect);
2750 static int cma_accept_ib(struct rdma_id_private *id_priv,
2751 struct rdma_conn_param *conn_param)
2753 struct ib_cm_rep_param rep;
2756 ret = cma_modify_qp_rtr(id_priv, conn_param);
2760 ret = cma_modify_qp_rts(id_priv, conn_param);
2764 memset(&rep, 0, sizeof rep);
2765 rep.qp_num = id_priv->qp_num;
2766 rep.starting_psn = id_priv->seq_num;
2767 rep.private_data = conn_param->private_data;
2768 rep.private_data_len = conn_param->private_data_len;
2769 rep.responder_resources = conn_param->responder_resources;
2770 rep.initiator_depth = conn_param->initiator_depth;
2771 rep.failover_accepted = 0;
2772 rep.flow_control = conn_param->flow_control;
2773 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2774 rep.srq = id_priv->srq ? 1 : 0;
2776 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2781 static int cma_accept_iw(struct rdma_id_private *id_priv,
2782 struct rdma_conn_param *conn_param)
2784 struct iw_cm_conn_param iw_param;
2787 ret = cma_modify_qp_rtr(id_priv, conn_param);
2791 iw_param.ord = conn_param->initiator_depth;
2792 iw_param.ird = conn_param->responder_resources;
2793 iw_param.private_data = conn_param->private_data;
2794 iw_param.private_data_len = conn_param->private_data_len;
2795 if (id_priv->id.qp) {
2796 iw_param.qpn = id_priv->qp_num;
2798 iw_param.qpn = conn_param->qp_num;
2800 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2803 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2804 enum ib_cm_sidr_status status,
2805 const void *private_data, int private_data_len)
2807 struct ib_cm_sidr_rep_param rep;
2810 memset(&rep, 0, sizeof rep);
2811 rep.status = status;
2812 if (status == IB_SIDR_SUCCESS) {
2813 ret = cma_set_qkey(id_priv);
2816 rep.qp_num = id_priv->qp_num;
2817 rep.qkey = id_priv->qkey;
2819 rep.private_data = private_data;
2820 rep.private_data_len = private_data_len;
2822 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2825 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2827 struct rdma_id_private *id_priv;
2830 id_priv = container_of(id, struct rdma_id_private, id);
2832 id_priv->owner = task_pid_nr(current);
2834 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2837 if (!id->qp && conn_param) {
2838 id_priv->qp_num = conn_param->qp_num;
2839 id_priv->srq = conn_param->srq;
2842 switch (rdma_node_get_transport(id->device->node_type)) {
2843 case RDMA_TRANSPORT_IB:
2844 if (id->qp_type == IB_QPT_UD) {
2846 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2847 conn_param->private_data,
2848 conn_param->private_data_len);
2850 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2854 ret = cma_accept_ib(id_priv, conn_param);
2856 ret = cma_rep_recv(id_priv);
2859 case RDMA_TRANSPORT_IWARP:
2860 ret = cma_accept_iw(id_priv, conn_param);
2872 cma_modify_qp_err(id_priv);
2873 rdma_reject(id, NULL, 0);
2876 EXPORT_SYMBOL(rdma_accept);
2878 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2880 struct rdma_id_private *id_priv;
2883 id_priv = container_of(id, struct rdma_id_private, id);
2884 if (!id_priv->cm_id.ib)
2887 switch (id->device->node_type) {
2888 case RDMA_NODE_IB_CA:
2889 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2897 EXPORT_SYMBOL(rdma_notify);
2899 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2900 u8 private_data_len)
2902 struct rdma_id_private *id_priv;
2905 id_priv = container_of(id, struct rdma_id_private, id);
2906 if (!id_priv->cm_id.ib)
2909 switch (rdma_node_get_transport(id->device->node_type)) {
2910 case RDMA_TRANSPORT_IB:
2911 if (id->qp_type == IB_QPT_UD)
2912 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2913 private_data, private_data_len);
2915 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2916 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2917 0, private_data, private_data_len);
2919 case RDMA_TRANSPORT_IWARP:
2920 ret = iw_cm_reject(id_priv->cm_id.iw,
2921 private_data, private_data_len);
2929 EXPORT_SYMBOL(rdma_reject);
2931 int rdma_disconnect(struct rdma_cm_id *id)
2933 struct rdma_id_private *id_priv;
2936 id_priv = container_of(id, struct rdma_id_private, id);
2937 if (!id_priv->cm_id.ib)
2940 switch (rdma_node_get_transport(id->device->node_type)) {
2941 case RDMA_TRANSPORT_IB:
2942 ret = cma_modify_qp_err(id_priv);
2945 /* Initiate or respond to a disconnect. */
2946 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2947 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2949 case RDMA_TRANSPORT_IWARP:
2950 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2959 EXPORT_SYMBOL(rdma_disconnect);
2961 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2963 struct rdma_id_private *id_priv;
2964 struct cma_multicast *mc = multicast->context;
2965 struct rdma_cm_event event;
2968 id_priv = mc->id_priv;
2969 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
2970 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
2973 mutex_lock(&id_priv->qp_mutex);
2974 if (!status && id_priv->id.qp)
2975 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2976 be16_to_cpu(multicast->rec.mlid));
2977 mutex_unlock(&id_priv->qp_mutex);
2979 memset(&event, 0, sizeof event);
2980 event.status = status;
2981 event.param.ud.private_data = mc->context;
2983 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2984 ib_init_ah_from_mcmember(id_priv->id.device,
2985 id_priv->id.port_num, &multicast->rec,
2986 &event.param.ud.ah_attr);
2987 event.param.ud.qp_num = 0xFFFFFF;
2988 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2990 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2992 ret = id_priv->id.event_handler(&id_priv->id, &event);
2994 cma_exch(id_priv, RDMA_CM_DESTROYING);
2995 mutex_unlock(&id_priv->handler_mutex);
2996 rdma_destroy_id(&id_priv->id);
3000 mutex_unlock(&id_priv->handler_mutex);
3004 static void cma_set_mgid(struct rdma_id_private *id_priv,
3005 struct sockaddr *addr, union ib_gid *mgid)
3007 unsigned char mc_map[MAX_ADDR_LEN];
3008 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3009 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3010 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3012 if (cma_any_addr(addr)) {
3013 memset(mgid, 0, sizeof *mgid);
3014 } else if ((addr->sa_family == AF_INET6) &&
3015 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3017 /* IPv6 address is an SA assigned MGID. */
3018 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3019 } else if ((addr->sa_family == AF_INET6)) {
3020 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3021 if (id_priv->id.ps == RDMA_PS_UDP)
3022 mc_map[7] = 0x01; /* Use RDMA CM signature */
3023 *mgid = *(union ib_gid *) (mc_map + 4);
3025 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3026 if (id_priv->id.ps == RDMA_PS_UDP)
3027 mc_map[7] = 0x01; /* Use RDMA CM signature */
3028 *mgid = *(union ib_gid *) (mc_map + 4);
3032 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3033 struct cma_multicast *mc)
3035 struct ib_sa_mcmember_rec rec;
3036 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3037 ib_sa_comp_mask comp_mask;
3040 ib_addr_get_mgid(dev_addr, &rec.mgid);
3041 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3046 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3047 if (id_priv->id.ps == RDMA_PS_UDP)
3048 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3049 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3050 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3053 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3054 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3055 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3056 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3057 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3059 if (id_priv->id.ps == RDMA_PS_IPOIB)
3060 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3061 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3062 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3063 IB_SA_MCMEMBER_REC_MTU |
3064 IB_SA_MCMEMBER_REC_HOP_LIMIT;
3066 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3067 id_priv->id.port_num, &rec,
3068 comp_mask, GFP_KERNEL,
3069 cma_ib_mc_handler, mc);
3070 return PTR_RET(mc->multicast.ib);
3073 static void iboe_mcast_work_handler(struct work_struct *work)
3075 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3076 struct cma_multicast *mc = mw->mc;
3077 struct ib_sa_multicast *m = mc->multicast.ib;
3079 mc->multicast.ib->context = mc;
3080 cma_ib_mc_handler(0, m);
3081 kref_put(&mc->mcref, release_mc);
3085 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3087 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3088 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3090 if (cma_any_addr(addr)) {
3091 memset(mgid, 0, sizeof *mgid);
3092 } else if (addr->sa_family == AF_INET6) {
3093 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3095 mgid->raw[0] = 0xff;
3096 mgid->raw[1] = 0x0e;
3105 mgid->raw[10] = 0xff;
3106 mgid->raw[11] = 0xff;
3107 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3111 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3112 struct cma_multicast *mc)
3114 struct iboe_mcast_work *work;
3115 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3117 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3118 struct net_device *ndev = NULL;
3120 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3123 work = kzalloc(sizeof *work, GFP_KERNEL);
3127 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3128 if (!mc->multicast.ib) {
3133 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3135 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3136 if (id_priv->id.ps == RDMA_PS_UDP)
3137 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3139 if (dev_addr->bound_dev_if)
3140 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3145 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3146 mc->multicast.ib->rec.hop_limit = 1;
3147 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3149 if (!mc->multicast.ib->rec.mtu) {
3153 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3156 INIT_WORK(&work->work, iboe_mcast_work_handler);
3157 kref_get(&mc->mcref);
3158 queue_work(cma_wq, &work->work);
3163 kfree(mc->multicast.ib);
3169 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3172 struct rdma_id_private *id_priv;
3173 struct cma_multicast *mc;
3176 id_priv = container_of(id, struct rdma_id_private, id);
3177 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3178 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3181 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3185 memcpy(&mc->addr, addr, ip_addr_size(addr));
3186 mc->context = context;
3187 mc->id_priv = id_priv;
3189 spin_lock(&id_priv->lock);
3190 list_add(&mc->list, &id_priv->mc_list);
3191 spin_unlock(&id_priv->lock);
3193 switch (rdma_node_get_transport(id->device->node_type)) {
3194 case RDMA_TRANSPORT_IB:
3195 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3196 case IB_LINK_LAYER_INFINIBAND:
3197 ret = cma_join_ib_multicast(id_priv, mc);
3199 case IB_LINK_LAYER_ETHERNET:
3200 kref_init(&mc->mcref);
3201 ret = cma_iboe_join_multicast(id_priv, mc);
3213 spin_lock_irq(&id_priv->lock);
3214 list_del(&mc->list);
3215 spin_unlock_irq(&id_priv->lock);
3220 EXPORT_SYMBOL(rdma_join_multicast);
3222 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3224 struct rdma_id_private *id_priv;
3225 struct cma_multicast *mc;
3227 id_priv = container_of(id, struct rdma_id_private, id);
3228 spin_lock_irq(&id_priv->lock);
3229 list_for_each_entry(mc, &id_priv->mc_list, list) {
3230 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3231 list_del(&mc->list);
3232 spin_unlock_irq(&id_priv->lock);
3235 ib_detach_mcast(id->qp,
3236 &mc->multicast.ib->rec.mgid,
3237 be16_to_cpu(mc->multicast.ib->rec.mlid));
3238 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3239 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3240 case IB_LINK_LAYER_INFINIBAND:
3241 ib_sa_free_multicast(mc->multicast.ib);
3244 case IB_LINK_LAYER_ETHERNET:
3245 kref_put(&mc->mcref, release_mc);
3254 spin_unlock_irq(&id_priv->lock);
3256 EXPORT_SYMBOL(rdma_leave_multicast);
3258 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3260 struct rdma_dev_addr *dev_addr;
3261 struct cma_ndev_work *work;
3263 dev_addr = &id_priv->id.route.addr.dev_addr;
3265 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3266 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3267 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3268 ndev->name, &id_priv->id);
3269 work = kzalloc(sizeof *work, GFP_KERNEL);
3273 INIT_WORK(&work->work, cma_ndev_work_handler);
3275 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3276 atomic_inc(&id_priv->refcount);
3277 queue_work(cma_wq, &work->work);
3283 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3286 struct net_device *ndev = (struct net_device *)ctx;
3287 struct cma_device *cma_dev;
3288 struct rdma_id_private *id_priv;
3289 int ret = NOTIFY_DONE;
3291 if (dev_net(ndev) != &init_net)
3294 if (event != NETDEV_BONDING_FAILOVER)
3297 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3301 list_for_each_entry(cma_dev, &dev_list, list)
3302 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3303 ret = cma_netdev_change(ndev, id_priv);
3309 mutex_unlock(&lock);
3313 static struct notifier_block cma_nb = {
3314 .notifier_call = cma_netdev_callback
3317 static void cma_add_one(struct ib_device *device)
3319 struct cma_device *cma_dev;
3320 struct rdma_id_private *id_priv;
3322 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3326 cma_dev->device = device;
3328 init_completion(&cma_dev->comp);
3329 atomic_set(&cma_dev->refcount, 1);
3330 INIT_LIST_HEAD(&cma_dev->id_list);
3331 ib_set_client_data(device, &cma_client, cma_dev);
3334 list_add_tail(&cma_dev->list, &dev_list);
3335 list_for_each_entry(id_priv, &listen_any_list, list)
3336 cma_listen_on_dev(id_priv, cma_dev);
3337 mutex_unlock(&lock);
3340 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3342 struct rdma_cm_event event;
3343 enum rdma_cm_state state;
3346 /* Record that we want to remove the device */
3347 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3348 if (state == RDMA_CM_DESTROYING)
3351 cma_cancel_operation(id_priv, state);
3352 mutex_lock(&id_priv->handler_mutex);
3354 /* Check for destruction from another callback. */
3355 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3358 memset(&event, 0, sizeof event);
3359 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3360 ret = id_priv->id.event_handler(&id_priv->id, &event);
3362 mutex_unlock(&id_priv->handler_mutex);
3366 static void cma_process_remove(struct cma_device *cma_dev)
3368 struct rdma_id_private *id_priv;
3372 while (!list_empty(&cma_dev->id_list)) {
3373 id_priv = list_entry(cma_dev->id_list.next,
3374 struct rdma_id_private, list);
3376 list_del(&id_priv->listen_list);
3377 list_del_init(&id_priv->list);
3378 atomic_inc(&id_priv->refcount);
3379 mutex_unlock(&lock);
3381 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3382 cma_deref_id(id_priv);
3384 rdma_destroy_id(&id_priv->id);
3388 mutex_unlock(&lock);
3390 cma_deref_dev(cma_dev);
3391 wait_for_completion(&cma_dev->comp);
3394 static void cma_remove_one(struct ib_device *device)
3396 struct cma_device *cma_dev;
3398 cma_dev = ib_get_client_data(device, &cma_client);
3403 list_del(&cma_dev->list);
3404 mutex_unlock(&lock);
3406 cma_process_remove(cma_dev);
3410 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3412 struct nlmsghdr *nlh;
3413 struct rdma_cm_id_stats *id_stats;
3414 struct rdma_id_private *id_priv;
3415 struct rdma_cm_id *id = NULL;
3416 struct cma_device *cma_dev;
3417 int i_dev = 0, i_id = 0;
3420 * We export all of the IDs as a sequence of messages. Each
3421 * ID gets its own netlink message.
3425 list_for_each_entry(cma_dev, &dev_list, list) {
3426 if (i_dev < cb->args[0]) {
3432 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3433 if (i_id < cb->args[1]) {
3438 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3439 sizeof *id_stats, RDMA_NL_RDMA_CM,
3440 RDMA_NL_RDMA_CM_ID_STATS);
3444 memset(id_stats, 0, sizeof *id_stats);
3446 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3447 id_stats->port_num = id->port_num;
3448 id_stats->bound_dev_if =
3449 id->route.addr.dev_addr.bound_dev_if;
3451 if (id->route.addr.src_addr.ss_family == AF_INET) {
3452 if (ibnl_put_attr(skb, nlh,
3453 sizeof(struct sockaddr_in),
3454 &id->route.addr.src_addr,
3455 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3458 if (ibnl_put_attr(skb, nlh,
3459 sizeof(struct sockaddr_in),
3460 &id->route.addr.dst_addr,
3461 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3464 } else if (id->route.addr.src_addr.ss_family == AF_INET6) {
3465 if (ibnl_put_attr(skb, nlh,
3466 sizeof(struct sockaddr_in6),
3467 &id->route.addr.src_addr,
3468 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3471 if (ibnl_put_attr(skb, nlh,
3472 sizeof(struct sockaddr_in6),
3473 &id->route.addr.dst_addr,
3474 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3479 id_stats->pid = id_priv->owner;
3480 id_stats->port_space = id->ps;
3481 id_stats->cm_state = id_priv->state;
3482 id_stats->qp_num = id_priv->qp_num;
3483 id_stats->qp_type = id->qp_type;
3493 mutex_unlock(&lock);
3494 cb->args[0] = i_dev;
3500 static const struct ibnl_client_cbs cma_cb_table[] = {
3501 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats },
3504 static int __init cma_init(void)
3508 cma_wq = create_singlethread_workqueue("rdma_cm");
3512 ib_sa_register_client(&sa_client);
3513 rdma_addr_register_client(&addr_client);
3514 register_netdevice_notifier(&cma_nb);
3516 ret = ib_register_client(&cma_client);
3520 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3521 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3526 unregister_netdevice_notifier(&cma_nb);
3527 rdma_addr_unregister_client(&addr_client);
3528 ib_sa_unregister_client(&sa_client);
3529 destroy_workqueue(cma_wq);
3533 static void __exit cma_cleanup(void)
3535 ibnl_remove_client(RDMA_NL_RDMA_CM);
3536 ib_unregister_client(&cma_client);
3537 unregister_netdevice_notifier(&cma_nb);
3538 rdma_addr_unregister_client(&addr_client);
3539 ib_sa_unregister_client(&sa_client);
3540 destroy_workqueue(cma_wq);
3541 idr_destroy(&sdp_ps);
3542 idr_destroy(&tcp_ps);
3543 idr_destroy(&udp_ps);
3544 idr_destroy(&ipoib_ps);
3545 idr_destroy(&ib_ps);
3548 module_init(cma_init);
3549 module_exit(cma_cleanup);