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>
48 #include <rdma/rdma_cm.h>
49 #include <rdma/rdma_cm_ib.h>
50 #include <rdma/ib_cache.h>
51 #include <rdma/ib_cm.h>
52 #include <rdma/ib_sa.h>
53 #include <rdma/iw_cm.h>
55 MODULE_AUTHOR("Sean Hefty");
56 MODULE_DESCRIPTION("Generic RDMA CM Agent");
57 MODULE_LICENSE("Dual BSD/GPL");
59 #define CMA_CM_RESPONSE_TIMEOUT 20
60 #define CMA_MAX_CM_RETRIES 15
61 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
62 #define CMA_IBOE_PACKET_LIFETIME 18
64 static void cma_add_one(struct ib_device *device);
65 static void cma_remove_one(struct ib_device *device);
67 static struct ib_client cma_client = {
70 .remove = cma_remove_one
73 static struct ib_sa_client sa_client;
74 static struct rdma_addr_client addr_client;
75 static LIST_HEAD(dev_list);
76 static LIST_HEAD(listen_any_list);
77 static DEFINE_MUTEX(lock);
78 static struct workqueue_struct *cma_wq;
79 static DEFINE_IDR(sdp_ps);
80 static DEFINE_IDR(tcp_ps);
81 static DEFINE_IDR(udp_ps);
82 static DEFINE_IDR(ipoib_ps);
85 struct list_head list;
86 struct ib_device *device;
87 struct completion comp;
89 struct list_head id_list;
106 struct rdma_bind_list {
108 struct hlist_head owners;
113 * Device removal can occur at anytime, so we need extra handling to
114 * serialize notifying the user of device removal with other callbacks.
115 * We do this by disabling removal notification while a callback is in process,
116 * and reporting it after the callback completes.
118 struct rdma_id_private {
119 struct rdma_cm_id id;
121 struct rdma_bind_list *bind_list;
122 struct hlist_node node;
123 struct list_head list; /* listen_any_list or cma_device.list */
124 struct list_head listen_list; /* per device listens */
125 struct cma_device *cma_dev;
126 struct list_head mc_list;
129 enum cma_state state;
131 struct mutex qp_mutex;
133 struct completion comp;
135 struct mutex handler_mutex;
139 struct ib_sa_query *query;
154 struct cma_multicast {
155 struct rdma_id_private *id_priv;
157 struct ib_sa_multicast *ib;
159 struct list_head list;
161 struct sockaddr_storage addr;
166 struct work_struct work;
167 struct rdma_id_private *id;
168 enum cma_state old_state;
169 enum cma_state new_state;
170 struct rdma_cm_event event;
173 struct cma_ndev_work {
174 struct work_struct work;
175 struct rdma_id_private *id;
176 struct rdma_cm_event event;
179 struct iboe_mcast_work {
180 struct work_struct work;
181 struct rdma_id_private *id;
182 struct cma_multicast *mc;
195 u8 ip_version; /* IP version: 7:4 */
197 union cma_ip_addr src_addr;
198 union cma_ip_addr dst_addr;
203 u8 sdp_version; /* Major version: 7:4 */
204 u8 ip_version; /* IP version: 7:4 */
205 u8 sdp_specific1[10];
207 __be16 sdp_specific2;
208 union cma_ip_addr src_addr;
209 union cma_ip_addr dst_addr;
217 #define CMA_VERSION 0x00
218 #define SDP_MAJ_VERSION 0x2
220 static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
225 spin_lock_irqsave(&id_priv->lock, flags);
226 ret = (id_priv->state == comp);
227 spin_unlock_irqrestore(&id_priv->lock, flags);
231 static int cma_comp_exch(struct rdma_id_private *id_priv,
232 enum cma_state comp, enum cma_state exch)
237 spin_lock_irqsave(&id_priv->lock, flags);
238 if ((ret = (id_priv->state == comp)))
239 id_priv->state = exch;
240 spin_unlock_irqrestore(&id_priv->lock, flags);
244 static enum cma_state cma_exch(struct rdma_id_private *id_priv,
250 spin_lock_irqsave(&id_priv->lock, flags);
251 old = id_priv->state;
252 id_priv->state = exch;
253 spin_unlock_irqrestore(&id_priv->lock, flags);
257 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
259 return hdr->ip_version >> 4;
262 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
264 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
267 static inline u8 sdp_get_majv(u8 sdp_version)
269 return sdp_version >> 4;
272 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
274 return hh->ip_version >> 4;
277 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
279 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
282 static inline int cma_is_ud_ps(enum rdma_port_space ps)
284 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
287 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
288 struct cma_device *cma_dev)
290 atomic_inc(&cma_dev->refcount);
291 id_priv->cma_dev = cma_dev;
292 id_priv->id.device = cma_dev->device;
293 id_priv->id.route.addr.dev_addr.transport =
294 rdma_node_get_transport(cma_dev->device->node_type);
295 list_add_tail(&id_priv->list, &cma_dev->id_list);
298 static inline void cma_deref_dev(struct cma_device *cma_dev)
300 if (atomic_dec_and_test(&cma_dev->refcount))
301 complete(&cma_dev->comp);
304 static inline void release_mc(struct kref *kref)
306 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
308 kfree(mc->multicast.ib);
312 static void cma_release_dev(struct rdma_id_private *id_priv)
315 list_del(&id_priv->list);
316 cma_deref_dev(id_priv->cma_dev);
317 id_priv->cma_dev = NULL;
321 static int cma_set_qkey(struct rdma_id_private *id_priv)
323 struct ib_sa_mcmember_rec rec;
329 switch (id_priv->id.ps) {
331 id_priv->qkey = RDMA_UDP_QKEY;
334 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
335 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
336 id_priv->id.port_num, &rec.mgid,
339 id_priv->qkey = be32_to_cpu(rec.qkey);
347 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
351 struct ib_port_attr props;
354 err = ib_query_port(device, port_num, &props);
358 for (i = 0; i < props.gid_tbl_len; ++i) {
359 err = ib_query_gid(device, port_num, i, &tmp);
362 if (!memcmp(&tmp, gid, sizeof tmp))
369 static int cma_acquire_dev(struct rdma_id_private *id_priv)
371 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
372 struct cma_device *cma_dev;
373 union ib_gid gid, iboe_gid;
376 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
377 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
380 iboe_addr_get_sgid(dev_addr, &iboe_gid);
381 memcpy(&gid, dev_addr->src_dev_addr +
382 rdma_addr_gid_offset(dev_addr), sizeof gid);
383 list_for_each_entry(cma_dev, &dev_list, list) {
384 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
385 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
386 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
387 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
388 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
390 ret = find_gid_port(cma_dev->device, &gid, port);
393 id_priv->id.port_num = port;
403 cma_attach_to_dev(id_priv, cma_dev);
409 static void cma_deref_id(struct rdma_id_private *id_priv)
411 if (atomic_dec_and_test(&id_priv->refcount))
412 complete(&id_priv->comp);
415 static int cma_disable_callback(struct rdma_id_private *id_priv,
416 enum cma_state state)
418 mutex_lock(&id_priv->handler_mutex);
419 if (id_priv->state != state) {
420 mutex_unlock(&id_priv->handler_mutex);
426 static int cma_has_cm_dev(struct rdma_id_private *id_priv)
428 return (id_priv->id.device && id_priv->cm_id.ib);
431 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
432 void *context, enum rdma_port_space ps)
434 struct rdma_id_private *id_priv;
436 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
438 return ERR_PTR(-ENOMEM);
440 id_priv->state = CMA_IDLE;
441 id_priv->id.context = context;
442 id_priv->id.event_handler = event_handler;
444 spin_lock_init(&id_priv->lock);
445 mutex_init(&id_priv->qp_mutex);
446 init_completion(&id_priv->comp);
447 atomic_set(&id_priv->refcount, 1);
448 mutex_init(&id_priv->handler_mutex);
449 INIT_LIST_HEAD(&id_priv->listen_list);
450 INIT_LIST_HEAD(&id_priv->mc_list);
451 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
455 EXPORT_SYMBOL(rdma_create_id);
457 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
459 struct ib_qp_attr qp_attr;
460 int qp_attr_mask, ret;
462 qp_attr.qp_state = IB_QPS_INIT;
463 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
467 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
471 qp_attr.qp_state = IB_QPS_RTR;
472 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
476 qp_attr.qp_state = IB_QPS_RTS;
478 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
483 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
485 struct ib_qp_attr qp_attr;
486 int qp_attr_mask, ret;
488 qp_attr.qp_state = IB_QPS_INIT;
489 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
493 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
496 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
497 struct ib_qp_init_attr *qp_init_attr)
499 struct rdma_id_private *id_priv;
503 id_priv = container_of(id, struct rdma_id_private, id);
504 if (id->device != pd->device)
507 qp = ib_create_qp(pd, qp_init_attr);
511 if (cma_is_ud_ps(id_priv->id.ps))
512 ret = cma_init_ud_qp(id_priv, qp);
514 ret = cma_init_conn_qp(id_priv, qp);
519 id_priv->qp_num = qp->qp_num;
520 id_priv->srq = (qp->srq != NULL);
526 EXPORT_SYMBOL(rdma_create_qp);
528 void rdma_destroy_qp(struct rdma_cm_id *id)
530 struct rdma_id_private *id_priv;
532 id_priv = container_of(id, struct rdma_id_private, id);
533 mutex_lock(&id_priv->qp_mutex);
534 ib_destroy_qp(id_priv->id.qp);
535 id_priv->id.qp = NULL;
536 mutex_unlock(&id_priv->qp_mutex);
538 EXPORT_SYMBOL(rdma_destroy_qp);
540 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
541 struct rdma_conn_param *conn_param)
543 struct ib_qp_attr qp_attr;
544 int qp_attr_mask, ret;
546 mutex_lock(&id_priv->qp_mutex);
547 if (!id_priv->id.qp) {
552 /* Need to update QP attributes from default values. */
553 qp_attr.qp_state = IB_QPS_INIT;
554 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
558 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
562 qp_attr.qp_state = IB_QPS_RTR;
563 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
568 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
569 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
571 mutex_unlock(&id_priv->qp_mutex);
575 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
576 struct rdma_conn_param *conn_param)
578 struct ib_qp_attr qp_attr;
579 int qp_attr_mask, ret;
581 mutex_lock(&id_priv->qp_mutex);
582 if (!id_priv->id.qp) {
587 qp_attr.qp_state = IB_QPS_RTS;
588 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
593 qp_attr.max_rd_atomic = conn_param->initiator_depth;
594 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
596 mutex_unlock(&id_priv->qp_mutex);
600 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
602 struct ib_qp_attr qp_attr;
605 mutex_lock(&id_priv->qp_mutex);
606 if (!id_priv->id.qp) {
611 qp_attr.qp_state = IB_QPS_ERR;
612 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
614 mutex_unlock(&id_priv->qp_mutex);
618 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
619 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
621 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
625 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
626 IB_LINK_LAYER_INFINIBAND)
627 pkey = ib_addr_get_pkey(dev_addr);
631 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
632 pkey, &qp_attr->pkey_index);
636 qp_attr->port_num = id_priv->id.port_num;
637 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
639 if (cma_is_ud_ps(id_priv->id.ps)) {
640 ret = cma_set_qkey(id_priv);
644 qp_attr->qkey = id_priv->qkey;
645 *qp_attr_mask |= IB_QP_QKEY;
647 qp_attr->qp_access_flags = 0;
648 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
653 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
656 struct rdma_id_private *id_priv;
659 id_priv = container_of(id, struct rdma_id_private, id);
660 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
661 case RDMA_TRANSPORT_IB:
662 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
663 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
665 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
667 if (qp_attr->qp_state == IB_QPS_RTR)
668 qp_attr->rq_psn = id_priv->seq_num;
670 case RDMA_TRANSPORT_IWARP:
671 if (!id_priv->cm_id.iw) {
672 qp_attr->qp_access_flags = 0;
673 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
675 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
685 EXPORT_SYMBOL(rdma_init_qp_attr);
687 static inline int cma_zero_addr(struct sockaddr *addr)
689 struct in6_addr *ip6;
691 if (addr->sa_family == AF_INET)
692 return ipv4_is_zeronet(
693 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
695 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
696 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
697 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
701 static inline int cma_loopback_addr(struct sockaddr *addr)
703 if (addr->sa_family == AF_INET)
704 return ipv4_is_loopback(
705 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
707 return ipv6_addr_loopback(
708 &((struct sockaddr_in6 *) addr)->sin6_addr);
711 static inline int cma_any_addr(struct sockaddr *addr)
713 return cma_zero_addr(addr) || cma_loopback_addr(addr);
716 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
718 if (src->sa_family != dst->sa_family)
721 switch (src->sa_family) {
723 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
724 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
726 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
727 &((struct sockaddr_in6 *) dst)->sin6_addr);
731 static inline __be16 cma_port(struct sockaddr *addr)
733 if (addr->sa_family == AF_INET)
734 return ((struct sockaddr_in *) addr)->sin_port;
736 return ((struct sockaddr_in6 *) addr)->sin6_port;
739 static inline int cma_any_port(struct sockaddr *addr)
741 return !cma_port(addr);
744 static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
745 u8 *ip_ver, __be16 *port,
746 union cma_ip_addr **src, union cma_ip_addr **dst)
750 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
754 *ip_ver = sdp_get_ip_ver(hdr);
755 *port = ((struct sdp_hh *) hdr)->port;
756 *src = &((struct sdp_hh *) hdr)->src_addr;
757 *dst = &((struct sdp_hh *) hdr)->dst_addr;
760 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
763 *ip_ver = cma_get_ip_ver(hdr);
764 *port = ((struct cma_hdr *) hdr)->port;
765 *src = &((struct cma_hdr *) hdr)->src_addr;
766 *dst = &((struct cma_hdr *) hdr)->dst_addr;
770 if (*ip_ver != 4 && *ip_ver != 6)
775 static void cma_save_net_info(struct rdma_addr *addr,
776 struct rdma_addr *listen_addr,
777 u8 ip_ver, __be16 port,
778 union cma_ip_addr *src, union cma_ip_addr *dst)
780 struct sockaddr_in *listen4, *ip4;
781 struct sockaddr_in6 *listen6, *ip6;
785 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
786 ip4 = (struct sockaddr_in *) &addr->src_addr;
787 ip4->sin_family = listen4->sin_family;
788 ip4->sin_addr.s_addr = dst->ip4.addr;
789 ip4->sin_port = listen4->sin_port;
791 ip4 = (struct sockaddr_in *) &addr->dst_addr;
792 ip4->sin_family = listen4->sin_family;
793 ip4->sin_addr.s_addr = src->ip4.addr;
794 ip4->sin_port = port;
797 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
798 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
799 ip6->sin6_family = listen6->sin6_family;
800 ip6->sin6_addr = dst->ip6;
801 ip6->sin6_port = listen6->sin6_port;
803 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
804 ip6->sin6_family = listen6->sin6_family;
805 ip6->sin6_addr = src->ip6;
806 ip6->sin6_port = port;
813 static inline int cma_user_data_offset(enum rdma_port_space ps)
819 return sizeof(struct cma_hdr);
823 static void cma_cancel_route(struct rdma_id_private *id_priv)
825 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
826 case IB_LINK_LAYER_INFINIBAND:
828 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
835 static void cma_cancel_listens(struct rdma_id_private *id_priv)
837 struct rdma_id_private *dev_id_priv;
840 * Remove from listen_any_list to prevent added devices from spawning
841 * additional listen requests.
844 list_del(&id_priv->list);
846 while (!list_empty(&id_priv->listen_list)) {
847 dev_id_priv = list_entry(id_priv->listen_list.next,
848 struct rdma_id_private, listen_list);
849 /* sync with device removal to avoid duplicate destruction */
850 list_del_init(&dev_id_priv->list);
851 list_del(&dev_id_priv->listen_list);
854 rdma_destroy_id(&dev_id_priv->id);
860 static void cma_cancel_operation(struct rdma_id_private *id_priv,
861 enum cma_state state)
865 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
867 case CMA_ROUTE_QUERY:
868 cma_cancel_route(id_priv);
871 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
872 && !id_priv->cma_dev)
873 cma_cancel_listens(id_priv);
880 static void cma_release_port(struct rdma_id_private *id_priv)
882 struct rdma_bind_list *bind_list = id_priv->bind_list;
888 hlist_del(&id_priv->node);
889 if (hlist_empty(&bind_list->owners)) {
890 idr_remove(bind_list->ps, bind_list->port);
896 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
898 struct cma_multicast *mc;
900 while (!list_empty(&id_priv->mc_list)) {
901 mc = container_of(id_priv->mc_list.next,
902 struct cma_multicast, list);
904 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
905 case IB_LINK_LAYER_INFINIBAND:
906 ib_sa_free_multicast(mc->multicast.ib);
909 case IB_LINK_LAYER_ETHERNET:
910 kref_put(&mc->mcref, release_mc);
918 void rdma_destroy_id(struct rdma_cm_id *id)
920 struct rdma_id_private *id_priv;
921 enum cma_state state;
923 id_priv = container_of(id, struct rdma_id_private, id);
924 state = cma_exch(id_priv, CMA_DESTROYING);
925 cma_cancel_operation(id_priv, state);
928 * Wait for any active callback to finish. New callbacks will find
929 * the id_priv state set to destroying and abort.
931 mutex_lock(&id_priv->handler_mutex);
932 mutex_unlock(&id_priv->handler_mutex);
934 if (id_priv->cma_dev) {
935 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
936 case RDMA_TRANSPORT_IB:
937 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
938 ib_destroy_cm_id(id_priv->cm_id.ib);
940 case RDMA_TRANSPORT_IWARP:
941 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
942 iw_destroy_cm_id(id_priv->cm_id.iw);
947 cma_leave_mc_groups(id_priv);
948 cma_release_dev(id_priv);
951 cma_release_port(id_priv);
952 cma_deref_id(id_priv);
953 wait_for_completion(&id_priv->comp);
955 if (id_priv->internal_id)
956 cma_deref_id(id_priv->id.context);
958 kfree(id_priv->id.route.path_rec);
961 EXPORT_SYMBOL(rdma_destroy_id);
963 static int cma_rep_recv(struct rdma_id_private *id_priv)
967 ret = cma_modify_qp_rtr(id_priv, NULL);
971 ret = cma_modify_qp_rts(id_priv, NULL);
975 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
981 cma_modify_qp_err(id_priv);
982 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
987 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
989 if (id_priv->id.ps == RDMA_PS_SDP &&
990 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
997 static void cma_set_rep_event_data(struct rdma_cm_event *event,
998 struct ib_cm_rep_event_param *rep_data,
1001 event->param.conn.private_data = private_data;
1002 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1003 event->param.conn.responder_resources = rep_data->responder_resources;
1004 event->param.conn.initiator_depth = rep_data->initiator_depth;
1005 event->param.conn.flow_control = rep_data->flow_control;
1006 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1007 event->param.conn.srq = rep_data->srq;
1008 event->param.conn.qp_num = rep_data->remote_qpn;
1011 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1013 struct rdma_id_private *id_priv = cm_id->context;
1014 struct rdma_cm_event event;
1017 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1018 cma_disable_callback(id_priv, CMA_CONNECT)) ||
1019 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1020 cma_disable_callback(id_priv, CMA_DISCONNECT)))
1023 memset(&event, 0, sizeof event);
1024 switch (ib_event->event) {
1025 case IB_CM_REQ_ERROR:
1026 case IB_CM_REP_ERROR:
1027 event.event = RDMA_CM_EVENT_UNREACHABLE;
1028 event.status = -ETIMEDOUT;
1030 case IB_CM_REP_RECEIVED:
1031 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1033 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1034 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
1035 event.status = cma_rep_recv(id_priv);
1036 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1037 RDMA_CM_EVENT_ESTABLISHED;
1039 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1040 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1041 ib_event->private_data);
1043 case IB_CM_RTU_RECEIVED:
1044 case IB_CM_USER_ESTABLISHED:
1045 event.event = RDMA_CM_EVENT_ESTABLISHED;
1047 case IB_CM_DREQ_ERROR:
1048 event.status = -ETIMEDOUT; /* fall through */
1049 case IB_CM_DREQ_RECEIVED:
1050 case IB_CM_DREP_RECEIVED:
1051 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
1053 event.event = RDMA_CM_EVENT_DISCONNECTED;
1055 case IB_CM_TIMEWAIT_EXIT:
1056 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1058 case IB_CM_MRA_RECEIVED:
1061 case IB_CM_REJ_RECEIVED:
1062 cma_modify_qp_err(id_priv);
1063 event.status = ib_event->param.rej_rcvd.reason;
1064 event.event = RDMA_CM_EVENT_REJECTED;
1065 event.param.conn.private_data = ib_event->private_data;
1066 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1069 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1074 ret = id_priv->id.event_handler(&id_priv->id, &event);
1076 /* Destroy the CM ID by returning a non-zero value. */
1077 id_priv->cm_id.ib = NULL;
1078 cma_exch(id_priv, CMA_DESTROYING);
1079 mutex_unlock(&id_priv->handler_mutex);
1080 rdma_destroy_id(&id_priv->id);
1084 mutex_unlock(&id_priv->handler_mutex);
1088 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1089 struct ib_cm_event *ib_event)
1091 struct rdma_id_private *id_priv;
1092 struct rdma_cm_id *id;
1093 struct rdma_route *rt;
1094 union cma_ip_addr *src, *dst;
1099 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1100 &ip_ver, &port, &src, &dst))
1103 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1108 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1109 ip_ver, port, src, dst);
1112 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1113 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1118 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1119 if (rt->num_paths == 2)
1120 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1122 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1123 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1124 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1125 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1127 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1128 &rt->addr.dev_addr);
1132 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1134 id_priv = container_of(id, struct rdma_id_private, id);
1135 id_priv->state = CMA_CONNECT;
1139 rdma_destroy_id(id);
1144 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1145 struct ib_cm_event *ib_event)
1147 struct rdma_id_private *id_priv;
1148 struct rdma_cm_id *id;
1149 union cma_ip_addr *src, *dst;
1154 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1160 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1161 &ip_ver, &port, &src, &dst))
1164 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1165 ip_ver, port, src, dst);
1167 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1168 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1169 &id->route.addr.dev_addr);
1174 id_priv = container_of(id, struct rdma_id_private, id);
1175 id_priv->state = CMA_CONNECT;
1178 rdma_destroy_id(id);
1182 static void cma_set_req_event_data(struct rdma_cm_event *event,
1183 struct ib_cm_req_event_param *req_data,
1184 void *private_data, int offset)
1186 event->param.conn.private_data = private_data + offset;
1187 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1188 event->param.conn.responder_resources = req_data->responder_resources;
1189 event->param.conn.initiator_depth = req_data->initiator_depth;
1190 event->param.conn.flow_control = req_data->flow_control;
1191 event->param.conn.retry_count = req_data->retry_count;
1192 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1193 event->param.conn.srq = req_data->srq;
1194 event->param.conn.qp_num = req_data->remote_qpn;
1197 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1199 struct rdma_id_private *listen_id, *conn_id;
1200 struct rdma_cm_event event;
1203 listen_id = cm_id->context;
1204 if (cma_disable_callback(listen_id, CMA_LISTEN))
1205 return -ECONNABORTED;
1207 memset(&event, 0, sizeof event);
1208 offset = cma_user_data_offset(listen_id->id.ps);
1209 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1210 if (cma_is_ud_ps(listen_id->id.ps)) {
1211 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1212 event.param.ud.private_data = ib_event->private_data + offset;
1213 event.param.ud.private_data_len =
1214 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1216 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1217 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1218 ib_event->private_data, offset);
1225 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1226 ret = cma_acquire_dev(conn_id);
1228 goto release_conn_id;
1230 conn_id->cm_id.ib = cm_id;
1231 cm_id->context = conn_id;
1232 cm_id->cm_handler = cma_ib_handler;
1235 * Protect against the user destroying conn_id from another thread
1236 * until we're done accessing it.
1238 atomic_inc(&conn_id->refcount);
1239 ret = conn_id->id.event_handler(&conn_id->id, &event);
1242 * Acquire mutex to prevent user executing rdma_destroy_id()
1243 * while we're accessing the cm_id.
1246 if (cma_comp(conn_id, CMA_CONNECT) &&
1247 !cma_is_ud_ps(conn_id->id.ps))
1248 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1249 mutex_unlock(&lock);
1250 mutex_unlock(&conn_id->handler_mutex);
1251 cma_deref_id(conn_id);
1254 cma_deref_id(conn_id);
1256 /* Destroy the CM ID by returning a non-zero value. */
1257 conn_id->cm_id.ib = NULL;
1260 cma_exch(conn_id, CMA_DESTROYING);
1261 mutex_unlock(&conn_id->handler_mutex);
1262 rdma_destroy_id(&conn_id->id);
1265 mutex_unlock(&listen_id->handler_mutex);
1269 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1271 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1274 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1275 struct ib_cm_compare_data *compare)
1277 struct cma_hdr *cma_data, *cma_mask;
1278 struct sdp_hh *sdp_data, *sdp_mask;
1280 struct in6_addr ip6_addr;
1282 memset(compare, 0, sizeof *compare);
1283 cma_data = (void *) compare->data;
1284 cma_mask = (void *) compare->mask;
1285 sdp_data = (void *) compare->data;
1286 sdp_mask = (void *) compare->mask;
1288 switch (addr->sa_family) {
1290 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1291 if (ps == RDMA_PS_SDP) {
1292 sdp_set_ip_ver(sdp_data, 4);
1293 sdp_set_ip_ver(sdp_mask, 0xF);
1294 sdp_data->dst_addr.ip4.addr = ip4_addr;
1295 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1297 cma_set_ip_ver(cma_data, 4);
1298 cma_set_ip_ver(cma_mask, 0xF);
1299 cma_data->dst_addr.ip4.addr = ip4_addr;
1300 cma_mask->dst_addr.ip4.addr = htonl(~0);
1304 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1305 if (ps == RDMA_PS_SDP) {
1306 sdp_set_ip_ver(sdp_data, 6);
1307 sdp_set_ip_ver(sdp_mask, 0xF);
1308 sdp_data->dst_addr.ip6 = ip6_addr;
1309 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1310 sizeof sdp_mask->dst_addr.ip6);
1312 cma_set_ip_ver(cma_data, 6);
1313 cma_set_ip_ver(cma_mask, 0xF);
1314 cma_data->dst_addr.ip6 = ip6_addr;
1315 memset(&cma_mask->dst_addr.ip6, 0xFF,
1316 sizeof cma_mask->dst_addr.ip6);
1324 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1326 struct rdma_id_private *id_priv = iw_id->context;
1327 struct rdma_cm_event event;
1328 struct sockaddr_in *sin;
1331 if (cma_disable_callback(id_priv, CMA_CONNECT))
1334 memset(&event, 0, sizeof event);
1335 switch (iw_event->event) {
1336 case IW_CM_EVENT_CLOSE:
1337 event.event = RDMA_CM_EVENT_DISCONNECTED;
1339 case IW_CM_EVENT_CONNECT_REPLY:
1340 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1341 *sin = iw_event->local_addr;
1342 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1343 *sin = iw_event->remote_addr;
1344 switch (iw_event->status) {
1346 event.event = RDMA_CM_EVENT_ESTABLISHED;
1350 event.event = RDMA_CM_EVENT_REJECTED;
1353 event.event = RDMA_CM_EVENT_UNREACHABLE;
1356 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1360 case IW_CM_EVENT_ESTABLISHED:
1361 event.event = RDMA_CM_EVENT_ESTABLISHED;
1367 event.status = iw_event->status;
1368 event.param.conn.private_data = iw_event->private_data;
1369 event.param.conn.private_data_len = iw_event->private_data_len;
1370 ret = id_priv->id.event_handler(&id_priv->id, &event);
1372 /* Destroy the CM ID by returning a non-zero value. */
1373 id_priv->cm_id.iw = NULL;
1374 cma_exch(id_priv, CMA_DESTROYING);
1375 mutex_unlock(&id_priv->handler_mutex);
1376 rdma_destroy_id(&id_priv->id);
1380 mutex_unlock(&id_priv->handler_mutex);
1384 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1385 struct iw_cm_event *iw_event)
1387 struct rdma_cm_id *new_cm_id;
1388 struct rdma_id_private *listen_id, *conn_id;
1389 struct sockaddr_in *sin;
1390 struct net_device *dev = NULL;
1391 struct rdma_cm_event event;
1393 struct ib_device_attr attr;
1395 listen_id = cm_id->context;
1396 if (cma_disable_callback(listen_id, CMA_LISTEN))
1397 return -ECONNABORTED;
1399 /* Create a new RDMA id for the new IW CM ID */
1400 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1401 listen_id->id.context,
1403 if (IS_ERR(new_cm_id)) {
1407 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1408 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1409 conn_id->state = CMA_CONNECT;
1411 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1413 ret = -EADDRNOTAVAIL;
1414 mutex_unlock(&conn_id->handler_mutex);
1415 rdma_destroy_id(new_cm_id);
1418 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1420 mutex_unlock(&conn_id->handler_mutex);
1421 rdma_destroy_id(new_cm_id);
1425 ret = cma_acquire_dev(conn_id);
1427 mutex_unlock(&conn_id->handler_mutex);
1428 rdma_destroy_id(new_cm_id);
1432 conn_id->cm_id.iw = cm_id;
1433 cm_id->context = conn_id;
1434 cm_id->cm_handler = cma_iw_handler;
1436 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1437 *sin = iw_event->local_addr;
1438 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1439 *sin = iw_event->remote_addr;
1441 ret = ib_query_device(conn_id->id.device, &attr);
1443 mutex_unlock(&conn_id->handler_mutex);
1444 rdma_destroy_id(new_cm_id);
1448 memset(&event, 0, sizeof event);
1449 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1450 event.param.conn.private_data = iw_event->private_data;
1451 event.param.conn.private_data_len = iw_event->private_data_len;
1452 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1453 event.param.conn.responder_resources = attr.max_qp_rd_atom;
1456 * Protect against the user destroying conn_id from another thread
1457 * until we're done accessing it.
1459 atomic_inc(&conn_id->refcount);
1460 ret = conn_id->id.event_handler(&conn_id->id, &event);
1462 /* User wants to destroy the CM ID */
1463 conn_id->cm_id.iw = NULL;
1464 cma_exch(conn_id, CMA_DESTROYING);
1465 mutex_unlock(&conn_id->handler_mutex);
1466 cma_deref_id(conn_id);
1467 rdma_destroy_id(&conn_id->id);
1471 mutex_unlock(&conn_id->handler_mutex);
1472 cma_deref_id(conn_id);
1477 mutex_unlock(&listen_id->handler_mutex);
1481 static int cma_ib_listen(struct rdma_id_private *id_priv)
1483 struct ib_cm_compare_data compare_data;
1484 struct sockaddr *addr;
1488 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1490 if (IS_ERR(id_priv->cm_id.ib))
1491 return PTR_ERR(id_priv->cm_id.ib);
1493 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1494 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1495 if (cma_any_addr(addr))
1496 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1498 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1499 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1503 ib_destroy_cm_id(id_priv->cm_id.ib);
1504 id_priv->cm_id.ib = NULL;
1510 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1513 struct sockaddr_in *sin;
1515 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1516 iw_conn_req_handler,
1518 if (IS_ERR(id_priv->cm_id.iw))
1519 return PTR_ERR(id_priv->cm_id.iw);
1521 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1522 id_priv->cm_id.iw->local_addr = *sin;
1524 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1527 iw_destroy_cm_id(id_priv->cm_id.iw);
1528 id_priv->cm_id.iw = NULL;
1534 static int cma_listen_handler(struct rdma_cm_id *id,
1535 struct rdma_cm_event *event)
1537 struct rdma_id_private *id_priv = id->context;
1539 id->context = id_priv->id.context;
1540 id->event_handler = id_priv->id.event_handler;
1541 return id_priv->id.event_handler(id, event);
1544 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1545 struct cma_device *cma_dev)
1547 struct rdma_id_private *dev_id_priv;
1548 struct rdma_cm_id *id;
1551 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1555 dev_id_priv = container_of(id, struct rdma_id_private, id);
1557 dev_id_priv->state = CMA_ADDR_BOUND;
1558 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1559 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1561 cma_attach_to_dev(dev_id_priv, cma_dev);
1562 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1563 atomic_inc(&id_priv->refcount);
1564 dev_id_priv->internal_id = 1;
1566 ret = rdma_listen(id, id_priv->backlog);
1568 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1569 "listening on device %s\n", ret, cma_dev->device->name);
1572 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1574 struct cma_device *cma_dev;
1577 list_add_tail(&id_priv->list, &listen_any_list);
1578 list_for_each_entry(cma_dev, &dev_list, list)
1579 cma_listen_on_dev(id_priv, cma_dev);
1580 mutex_unlock(&lock);
1583 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1585 struct rdma_id_private *id_priv;
1587 id_priv = container_of(id, struct rdma_id_private, id);
1588 id_priv->tos = (u8) tos;
1590 EXPORT_SYMBOL(rdma_set_service_type);
1592 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1595 struct cma_work *work = context;
1596 struct rdma_route *route;
1598 route = &work->id->id.route;
1601 route->num_paths = 1;
1602 *route->path_rec = *path_rec;
1604 work->old_state = CMA_ROUTE_QUERY;
1605 work->new_state = CMA_ADDR_RESOLVED;
1606 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1607 work->event.status = status;
1610 queue_work(cma_wq, &work->work);
1613 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1614 struct cma_work *work)
1616 struct rdma_addr *addr = &id_priv->id.route.addr;
1617 struct ib_sa_path_rec path_rec;
1618 ib_sa_comp_mask comp_mask;
1619 struct sockaddr_in6 *sin6;
1621 memset(&path_rec, 0, sizeof path_rec);
1622 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1623 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1624 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1625 path_rec.numb_path = 1;
1626 path_rec.reversible = 1;
1627 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1628 (struct sockaddr *) &addr->dst_addr);
1630 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1631 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1632 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1634 if (addr->src_addr.ss_family == AF_INET) {
1635 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1636 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1638 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1639 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1640 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1643 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1644 id_priv->id.port_num, &path_rec,
1645 comp_mask, timeout_ms,
1646 GFP_KERNEL, cma_query_handler,
1647 work, &id_priv->query);
1649 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1652 static void cma_work_handler(struct work_struct *_work)
1654 struct cma_work *work = container_of(_work, struct cma_work, work);
1655 struct rdma_id_private *id_priv = work->id;
1658 mutex_lock(&id_priv->handler_mutex);
1659 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1662 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1663 cma_exch(id_priv, CMA_DESTROYING);
1667 mutex_unlock(&id_priv->handler_mutex);
1668 cma_deref_id(id_priv);
1670 rdma_destroy_id(&id_priv->id);
1674 static void cma_ndev_work_handler(struct work_struct *_work)
1676 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1677 struct rdma_id_private *id_priv = work->id;
1680 mutex_lock(&id_priv->handler_mutex);
1681 if (id_priv->state == CMA_DESTROYING ||
1682 id_priv->state == CMA_DEVICE_REMOVAL)
1685 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1686 cma_exch(id_priv, CMA_DESTROYING);
1691 mutex_unlock(&id_priv->handler_mutex);
1692 cma_deref_id(id_priv);
1694 rdma_destroy_id(&id_priv->id);
1698 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1700 struct rdma_route *route = &id_priv->id.route;
1701 struct cma_work *work;
1704 work = kzalloc(sizeof *work, GFP_KERNEL);
1709 INIT_WORK(&work->work, cma_work_handler);
1710 work->old_state = CMA_ROUTE_QUERY;
1711 work->new_state = CMA_ROUTE_RESOLVED;
1712 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1714 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1715 if (!route->path_rec) {
1720 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1726 kfree(route->path_rec);
1727 route->path_rec = NULL;
1733 int rdma_set_ib_paths(struct rdma_cm_id *id,
1734 struct ib_sa_path_rec *path_rec, int num_paths)
1736 struct rdma_id_private *id_priv;
1739 id_priv = container_of(id, struct rdma_id_private, id);
1740 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1743 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1745 if (!id->route.path_rec) {
1750 id->route.num_paths = num_paths;
1753 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1756 EXPORT_SYMBOL(rdma_set_ib_paths);
1758 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1760 struct cma_work *work;
1762 work = kzalloc(sizeof *work, GFP_KERNEL);
1767 INIT_WORK(&work->work, cma_work_handler);
1768 work->old_state = CMA_ROUTE_QUERY;
1769 work->new_state = CMA_ROUTE_RESOLVED;
1770 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1771 queue_work(cma_wq, &work->work);
1775 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1777 struct rdma_route *route = &id_priv->id.route;
1778 struct rdma_addr *addr = &route->addr;
1779 struct cma_work *work;
1781 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1782 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1783 struct net_device *ndev = NULL;
1786 if (src_addr->sin_family != dst_addr->sin_family)
1789 work = kzalloc(sizeof *work, GFP_KERNEL);
1794 INIT_WORK(&work->work, cma_work_handler);
1796 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1797 if (!route->path_rec) {
1802 route->num_paths = 1;
1804 if (addr->dev_addr.bound_dev_if)
1805 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1811 vid = rdma_vlan_dev_vlan_id(ndev);
1813 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1814 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1816 route->path_rec->hop_limit = 1;
1817 route->path_rec->reversible = 1;
1818 route->path_rec->pkey = cpu_to_be16(0xffff);
1819 route->path_rec->mtu_selector = IB_SA_EQ;
1820 route->path_rec->sl = id_priv->tos >> 5;
1822 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1823 route->path_rec->rate_selector = IB_SA_EQ;
1824 route->path_rec->rate = iboe_get_rate(ndev);
1826 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1827 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1828 if (!route->path_rec->mtu) {
1833 work->old_state = CMA_ROUTE_QUERY;
1834 work->new_state = CMA_ROUTE_RESOLVED;
1835 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1836 work->event.status = 0;
1838 queue_work(cma_wq, &work->work);
1843 kfree(route->path_rec);
1844 route->path_rec = NULL;
1850 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1852 struct rdma_id_private *id_priv;
1855 id_priv = container_of(id, struct rdma_id_private, id);
1856 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1859 atomic_inc(&id_priv->refcount);
1860 switch (rdma_node_get_transport(id->device->node_type)) {
1861 case RDMA_TRANSPORT_IB:
1862 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1863 case IB_LINK_LAYER_INFINIBAND:
1864 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1866 case IB_LINK_LAYER_ETHERNET:
1867 ret = cma_resolve_iboe_route(id_priv);
1873 case RDMA_TRANSPORT_IWARP:
1874 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1885 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1886 cma_deref_id(id_priv);
1889 EXPORT_SYMBOL(rdma_resolve_route);
1891 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1893 struct cma_device *cma_dev;
1894 struct ib_port_attr port_attr;
1901 if (list_empty(&dev_list)) {
1905 list_for_each_entry(cma_dev, &dev_list, list)
1906 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1907 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1908 port_attr.state == IB_PORT_ACTIVE)
1912 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1915 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1919 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1923 id_priv->id.route.addr.dev_addr.dev_type =
1924 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1925 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1927 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1928 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1929 id_priv->id.port_num = p;
1930 cma_attach_to_dev(id_priv, cma_dev);
1932 mutex_unlock(&lock);
1936 static void addr_handler(int status, struct sockaddr *src_addr,
1937 struct rdma_dev_addr *dev_addr, void *context)
1939 struct rdma_id_private *id_priv = context;
1940 struct rdma_cm_event event;
1942 memset(&event, 0, sizeof event);
1943 mutex_lock(&id_priv->handler_mutex);
1944 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED))
1947 if (!status && !id_priv->cma_dev)
1948 status = cma_acquire_dev(id_priv);
1951 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
1953 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1954 event.status = status;
1956 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1957 ip_addr_size(src_addr));
1958 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1961 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1962 cma_exch(id_priv, CMA_DESTROYING);
1963 mutex_unlock(&id_priv->handler_mutex);
1964 cma_deref_id(id_priv);
1965 rdma_destroy_id(&id_priv->id);
1969 mutex_unlock(&id_priv->handler_mutex);
1970 cma_deref_id(id_priv);
1973 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1975 struct cma_work *work;
1976 struct sockaddr *src, *dst;
1980 work = kzalloc(sizeof *work, GFP_KERNEL);
1984 if (!id_priv->cma_dev) {
1985 ret = cma_bind_loopback(id_priv);
1990 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1991 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
1993 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1994 if (cma_zero_addr(src)) {
1995 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
1996 if ((src->sa_family = dst->sa_family) == AF_INET) {
1997 ((struct sockaddr_in *) src)->sin_addr.s_addr =
1998 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2000 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
2001 &((struct sockaddr_in6 *) dst)->sin6_addr);
2006 INIT_WORK(&work->work, cma_work_handler);
2007 work->old_state = CMA_ADDR_QUERY;
2008 work->new_state = CMA_ADDR_RESOLVED;
2009 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2010 queue_work(cma_wq, &work->work);
2017 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2018 struct sockaddr *dst_addr)
2020 if (!src_addr || !src_addr->sa_family) {
2021 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2022 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2023 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2024 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2027 return rdma_bind_addr(id, src_addr);
2030 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2031 struct sockaddr *dst_addr, int timeout_ms)
2033 struct rdma_id_private *id_priv;
2036 id_priv = container_of(id, struct rdma_id_private, id);
2037 if (id_priv->state == CMA_IDLE) {
2038 ret = cma_bind_addr(id, src_addr, dst_addr);
2043 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
2046 atomic_inc(&id_priv->refcount);
2047 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2048 if (cma_any_addr(dst_addr))
2049 ret = cma_resolve_loopback(id_priv);
2051 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2052 dst_addr, &id->route.addr.dev_addr,
2053 timeout_ms, addr_handler, id_priv);
2059 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
2060 cma_deref_id(id_priv);
2063 EXPORT_SYMBOL(rdma_resolve_addr);
2065 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2067 struct rdma_id_private *id_priv;
2068 unsigned long flags;
2071 id_priv = container_of(id, struct rdma_id_private, id);
2072 spin_lock_irqsave(&id_priv->lock, flags);
2073 if (id_priv->state == CMA_IDLE) {
2074 id_priv->reuseaddr = reuse;
2079 spin_unlock_irqrestore(&id_priv->lock, flags);
2082 EXPORT_SYMBOL(rdma_set_reuseaddr);
2084 static void cma_bind_port(struct rdma_bind_list *bind_list,
2085 struct rdma_id_private *id_priv)
2087 struct sockaddr_in *sin;
2089 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2090 sin->sin_port = htons(bind_list->port);
2091 id_priv->bind_list = bind_list;
2092 hlist_add_head(&id_priv->node, &bind_list->owners);
2095 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2096 unsigned short snum)
2098 struct rdma_bind_list *bind_list;
2101 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2106 ret = idr_get_new_above(ps, bind_list, snum, &port);
2107 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2113 ret = -EADDRNOTAVAIL;
2118 bind_list->port = (unsigned short) port;
2119 cma_bind_port(bind_list, id_priv);
2122 idr_remove(ps, port);
2128 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2130 static unsigned int last_used_port;
2131 int low, high, remaining;
2134 inet_get_local_port_range(&low, &high);
2135 remaining = (high - low) + 1;
2136 rover = net_random() % remaining + low;
2138 if (last_used_port != rover &&
2139 !idr_find(ps, (unsigned short) rover)) {
2140 int ret = cma_alloc_port(ps, id_priv, rover);
2142 * Remember previously used port number in order to avoid
2143 * re-using same port immediately after it is closed.
2146 last_used_port = rover;
2147 if (ret != -EADDRNOTAVAIL)
2152 if ((rover < low) || (rover > high))
2156 return -EADDRNOTAVAIL;
2160 * Check that the requested port is available. This is called when trying to
2161 * bind to a specific port, or when trying to listen on a bound port. In
2162 * the latter case, the provided id_priv may already be on the bind_list, but
2163 * we still need to check that it's okay to start listening.
2165 static int cma_check_port(struct rdma_bind_list *bind_list,
2166 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2168 struct rdma_id_private *cur_id;
2169 struct sockaddr *addr, *cur_addr;
2170 struct hlist_node *node;
2172 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2173 if (cma_any_addr(addr) && !reuseaddr)
2174 return -EADDRNOTAVAIL;
2176 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2177 if (id_priv == cur_id)
2180 if ((cur_id->state == CMA_LISTEN) ||
2181 !reuseaddr || !cur_id->reuseaddr) {
2182 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2183 if (cma_any_addr(cur_addr))
2184 return -EADDRNOTAVAIL;
2186 if (!cma_addr_cmp(addr, cur_addr))
2193 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2195 struct rdma_bind_list *bind_list;
2196 unsigned short snum;
2199 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2200 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2203 bind_list = idr_find(ps, snum);
2205 ret = cma_alloc_port(ps, id_priv, snum);
2207 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2209 cma_bind_port(bind_list, id_priv);
2214 static int cma_bind_listen(struct rdma_id_private *id_priv)
2216 struct rdma_bind_list *bind_list = id_priv->bind_list;
2220 if (bind_list->owners.first->next)
2221 ret = cma_check_port(bind_list, id_priv, 0);
2222 mutex_unlock(&lock);
2226 static int cma_get_port(struct rdma_id_private *id_priv)
2231 switch (id_priv->id.ps) {
2245 return -EPROTONOSUPPORT;
2249 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2250 ret = cma_alloc_any_port(ps, id_priv);
2252 ret = cma_use_port(ps, id_priv);
2253 mutex_unlock(&lock);
2258 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2259 struct sockaddr *addr)
2261 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2262 struct sockaddr_in6 *sin6;
2264 if (addr->sa_family != AF_INET6)
2267 sin6 = (struct sockaddr_in6 *) addr;
2268 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2269 !sin6->sin6_scope_id)
2272 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2277 int rdma_listen(struct rdma_cm_id *id, int backlog)
2279 struct rdma_id_private *id_priv;
2282 id_priv = container_of(id, struct rdma_id_private, id);
2283 if (id_priv->state == CMA_IDLE) {
2284 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2285 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2290 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
2293 if (id_priv->reuseaddr) {
2294 ret = cma_bind_listen(id_priv);
2299 id_priv->backlog = backlog;
2301 switch (rdma_node_get_transport(id->device->node_type)) {
2302 case RDMA_TRANSPORT_IB:
2303 ret = cma_ib_listen(id_priv);
2307 case RDMA_TRANSPORT_IWARP:
2308 ret = cma_iw_listen(id_priv, backlog);
2317 cma_listen_on_all(id_priv);
2321 id_priv->backlog = 0;
2322 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
2325 EXPORT_SYMBOL(rdma_listen);
2327 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2329 struct rdma_id_private *id_priv;
2332 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2333 return -EAFNOSUPPORT;
2335 id_priv = container_of(id, struct rdma_id_private, id);
2336 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2339 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2343 if (!cma_any_addr(addr)) {
2344 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2348 ret = cma_acquire_dev(id_priv);
2353 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2354 ret = cma_get_port(id_priv);
2360 if (id_priv->cma_dev)
2361 cma_release_dev(id_priv);
2363 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2366 EXPORT_SYMBOL(rdma_bind_addr);
2368 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2369 struct rdma_route *route)
2371 struct cma_hdr *cma_hdr;
2372 struct sdp_hh *sdp_hdr;
2374 if (route->addr.src_addr.ss_family == AF_INET) {
2375 struct sockaddr_in *src4, *dst4;
2377 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2378 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2383 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2385 sdp_set_ip_ver(sdp_hdr, 4);
2386 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2387 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2388 sdp_hdr->port = src4->sin_port;
2392 cma_hdr->cma_version = CMA_VERSION;
2393 cma_set_ip_ver(cma_hdr, 4);
2394 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2395 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2396 cma_hdr->port = src4->sin_port;
2400 struct sockaddr_in6 *src6, *dst6;
2402 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2403 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2408 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2410 sdp_set_ip_ver(sdp_hdr, 6);
2411 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2412 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2413 sdp_hdr->port = src6->sin6_port;
2417 cma_hdr->cma_version = CMA_VERSION;
2418 cma_set_ip_ver(cma_hdr, 6);
2419 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2420 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2421 cma_hdr->port = src6->sin6_port;
2428 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2429 struct ib_cm_event *ib_event)
2431 struct rdma_id_private *id_priv = cm_id->context;
2432 struct rdma_cm_event event;
2433 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2436 if (cma_disable_callback(id_priv, CMA_CONNECT))
2439 memset(&event, 0, sizeof event);
2440 switch (ib_event->event) {
2441 case IB_CM_SIDR_REQ_ERROR:
2442 event.event = RDMA_CM_EVENT_UNREACHABLE;
2443 event.status = -ETIMEDOUT;
2445 case IB_CM_SIDR_REP_RECEIVED:
2446 event.param.ud.private_data = ib_event->private_data;
2447 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2448 if (rep->status != IB_SIDR_SUCCESS) {
2449 event.event = RDMA_CM_EVENT_UNREACHABLE;
2450 event.status = ib_event->param.sidr_rep_rcvd.status;
2453 ret = cma_set_qkey(id_priv);
2455 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2456 event.status = -EINVAL;
2459 if (id_priv->qkey != rep->qkey) {
2460 event.event = RDMA_CM_EVENT_UNREACHABLE;
2461 event.status = -EINVAL;
2464 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2465 id_priv->id.route.path_rec,
2466 &event.param.ud.ah_attr);
2467 event.param.ud.qp_num = rep->qpn;
2468 event.param.ud.qkey = rep->qkey;
2469 event.event = RDMA_CM_EVENT_ESTABLISHED;
2473 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2478 ret = id_priv->id.event_handler(&id_priv->id, &event);
2480 /* Destroy the CM ID by returning a non-zero value. */
2481 id_priv->cm_id.ib = NULL;
2482 cma_exch(id_priv, CMA_DESTROYING);
2483 mutex_unlock(&id_priv->handler_mutex);
2484 rdma_destroy_id(&id_priv->id);
2488 mutex_unlock(&id_priv->handler_mutex);
2492 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2493 struct rdma_conn_param *conn_param)
2495 struct ib_cm_sidr_req_param req;
2496 struct rdma_route *route;
2499 req.private_data_len = sizeof(struct cma_hdr) +
2500 conn_param->private_data_len;
2501 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2502 if (!req.private_data)
2505 if (conn_param->private_data && conn_param->private_data_len)
2506 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2507 conn_param->private_data, conn_param->private_data_len);
2509 route = &id_priv->id.route;
2510 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2514 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2515 cma_sidr_rep_handler, id_priv);
2516 if (IS_ERR(id_priv->cm_id.ib)) {
2517 ret = PTR_ERR(id_priv->cm_id.ib);
2521 req.path = route->path_rec;
2522 req.service_id = cma_get_service_id(id_priv->id.ps,
2523 (struct sockaddr *) &route->addr.dst_addr);
2524 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2525 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2527 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2529 ib_destroy_cm_id(id_priv->cm_id.ib);
2530 id_priv->cm_id.ib = NULL;
2533 kfree(req.private_data);
2537 static int cma_connect_ib(struct rdma_id_private *id_priv,
2538 struct rdma_conn_param *conn_param)
2540 struct ib_cm_req_param req;
2541 struct rdma_route *route;
2545 memset(&req, 0, sizeof req);
2546 offset = cma_user_data_offset(id_priv->id.ps);
2547 req.private_data_len = offset + conn_param->private_data_len;
2548 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2552 if (conn_param->private_data && conn_param->private_data_len)
2553 memcpy(private_data + offset, conn_param->private_data,
2554 conn_param->private_data_len);
2556 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2558 if (IS_ERR(id_priv->cm_id.ib)) {
2559 ret = PTR_ERR(id_priv->cm_id.ib);
2563 route = &id_priv->id.route;
2564 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2567 req.private_data = private_data;
2569 req.primary_path = &route->path_rec[0];
2570 if (route->num_paths == 2)
2571 req.alternate_path = &route->path_rec[1];
2573 req.service_id = cma_get_service_id(id_priv->id.ps,
2574 (struct sockaddr *) &route->addr.dst_addr);
2575 req.qp_num = id_priv->qp_num;
2576 req.qp_type = IB_QPT_RC;
2577 req.starting_psn = id_priv->seq_num;
2578 req.responder_resources = conn_param->responder_resources;
2579 req.initiator_depth = conn_param->initiator_depth;
2580 req.flow_control = conn_param->flow_control;
2581 req.retry_count = conn_param->retry_count;
2582 req.rnr_retry_count = conn_param->rnr_retry_count;
2583 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2584 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2585 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2586 req.srq = id_priv->srq ? 1 : 0;
2588 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2590 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2591 ib_destroy_cm_id(id_priv->cm_id.ib);
2592 id_priv->cm_id.ib = NULL;
2595 kfree(private_data);
2599 static int cma_connect_iw(struct rdma_id_private *id_priv,
2600 struct rdma_conn_param *conn_param)
2602 struct iw_cm_id *cm_id;
2603 struct sockaddr_in* sin;
2605 struct iw_cm_conn_param iw_param;
2607 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2608 if (IS_ERR(cm_id)) {
2609 ret = PTR_ERR(cm_id);
2613 id_priv->cm_id.iw = cm_id;
2615 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2616 cm_id->local_addr = *sin;
2618 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2619 cm_id->remote_addr = *sin;
2621 ret = cma_modify_qp_rtr(id_priv, conn_param);
2625 iw_param.ord = conn_param->initiator_depth;
2626 iw_param.ird = conn_param->responder_resources;
2627 iw_param.private_data = conn_param->private_data;
2628 iw_param.private_data_len = conn_param->private_data_len;
2630 iw_param.qpn = id_priv->qp_num;
2632 iw_param.qpn = conn_param->qp_num;
2633 ret = iw_cm_connect(cm_id, &iw_param);
2635 if (ret && !IS_ERR(cm_id)) {
2636 iw_destroy_cm_id(cm_id);
2637 id_priv->cm_id.iw = NULL;
2642 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2644 struct rdma_id_private *id_priv;
2647 id_priv = container_of(id, struct rdma_id_private, id);
2648 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2652 id_priv->qp_num = conn_param->qp_num;
2653 id_priv->srq = conn_param->srq;
2656 switch (rdma_node_get_transport(id->device->node_type)) {
2657 case RDMA_TRANSPORT_IB:
2658 if (cma_is_ud_ps(id->ps))
2659 ret = cma_resolve_ib_udp(id_priv, conn_param);
2661 ret = cma_connect_ib(id_priv, conn_param);
2663 case RDMA_TRANSPORT_IWARP:
2664 ret = cma_connect_iw(id_priv, conn_param);
2675 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2678 EXPORT_SYMBOL(rdma_connect);
2680 static int cma_accept_ib(struct rdma_id_private *id_priv,
2681 struct rdma_conn_param *conn_param)
2683 struct ib_cm_rep_param rep;
2686 ret = cma_modify_qp_rtr(id_priv, conn_param);
2690 ret = cma_modify_qp_rts(id_priv, conn_param);
2694 memset(&rep, 0, sizeof rep);
2695 rep.qp_num = id_priv->qp_num;
2696 rep.starting_psn = id_priv->seq_num;
2697 rep.private_data = conn_param->private_data;
2698 rep.private_data_len = conn_param->private_data_len;
2699 rep.responder_resources = conn_param->responder_resources;
2700 rep.initiator_depth = conn_param->initiator_depth;
2701 rep.failover_accepted = 0;
2702 rep.flow_control = conn_param->flow_control;
2703 rep.rnr_retry_count = conn_param->rnr_retry_count;
2704 rep.srq = id_priv->srq ? 1 : 0;
2706 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2711 static int cma_accept_iw(struct rdma_id_private *id_priv,
2712 struct rdma_conn_param *conn_param)
2714 struct iw_cm_conn_param iw_param;
2717 ret = cma_modify_qp_rtr(id_priv, conn_param);
2721 iw_param.ord = conn_param->initiator_depth;
2722 iw_param.ird = conn_param->responder_resources;
2723 iw_param.private_data = conn_param->private_data;
2724 iw_param.private_data_len = conn_param->private_data_len;
2725 if (id_priv->id.qp) {
2726 iw_param.qpn = id_priv->qp_num;
2728 iw_param.qpn = conn_param->qp_num;
2730 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2733 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2734 enum ib_cm_sidr_status status,
2735 const void *private_data, int private_data_len)
2737 struct ib_cm_sidr_rep_param rep;
2740 memset(&rep, 0, sizeof rep);
2741 rep.status = status;
2742 if (status == IB_SIDR_SUCCESS) {
2743 ret = cma_set_qkey(id_priv);
2746 rep.qp_num = id_priv->qp_num;
2747 rep.qkey = id_priv->qkey;
2749 rep.private_data = private_data;
2750 rep.private_data_len = private_data_len;
2752 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2755 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2757 struct rdma_id_private *id_priv;
2760 id_priv = container_of(id, struct rdma_id_private, id);
2761 if (!cma_comp(id_priv, CMA_CONNECT))
2764 if (!id->qp && conn_param) {
2765 id_priv->qp_num = conn_param->qp_num;
2766 id_priv->srq = conn_param->srq;
2769 switch (rdma_node_get_transport(id->device->node_type)) {
2770 case RDMA_TRANSPORT_IB:
2771 if (cma_is_ud_ps(id->ps))
2772 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2773 conn_param->private_data,
2774 conn_param->private_data_len);
2775 else if (conn_param)
2776 ret = cma_accept_ib(id_priv, conn_param);
2778 ret = cma_rep_recv(id_priv);
2780 case RDMA_TRANSPORT_IWARP:
2781 ret = cma_accept_iw(id_priv, conn_param);
2793 cma_modify_qp_err(id_priv);
2794 rdma_reject(id, NULL, 0);
2797 EXPORT_SYMBOL(rdma_accept);
2799 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2801 struct rdma_id_private *id_priv;
2804 id_priv = container_of(id, struct rdma_id_private, id);
2805 if (!cma_has_cm_dev(id_priv))
2808 switch (id->device->node_type) {
2809 case RDMA_NODE_IB_CA:
2810 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2818 EXPORT_SYMBOL(rdma_notify);
2820 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2821 u8 private_data_len)
2823 struct rdma_id_private *id_priv;
2826 id_priv = container_of(id, struct rdma_id_private, id);
2827 if (!cma_has_cm_dev(id_priv))
2830 switch (rdma_node_get_transport(id->device->node_type)) {
2831 case RDMA_TRANSPORT_IB:
2832 if (cma_is_ud_ps(id->ps))
2833 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2834 private_data, private_data_len);
2836 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2837 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2838 0, private_data, private_data_len);
2840 case RDMA_TRANSPORT_IWARP:
2841 ret = iw_cm_reject(id_priv->cm_id.iw,
2842 private_data, private_data_len);
2850 EXPORT_SYMBOL(rdma_reject);
2852 int rdma_disconnect(struct rdma_cm_id *id)
2854 struct rdma_id_private *id_priv;
2857 id_priv = container_of(id, struct rdma_id_private, id);
2858 if (!cma_has_cm_dev(id_priv))
2861 switch (rdma_node_get_transport(id->device->node_type)) {
2862 case RDMA_TRANSPORT_IB:
2863 ret = cma_modify_qp_err(id_priv);
2866 /* Initiate or respond to a disconnect. */
2867 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2868 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2870 case RDMA_TRANSPORT_IWARP:
2871 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2880 EXPORT_SYMBOL(rdma_disconnect);
2882 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2884 struct rdma_id_private *id_priv;
2885 struct cma_multicast *mc = multicast->context;
2886 struct rdma_cm_event event;
2889 id_priv = mc->id_priv;
2890 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2891 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
2894 mutex_lock(&id_priv->qp_mutex);
2895 if (!status && id_priv->id.qp)
2896 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2897 multicast->rec.mlid);
2898 mutex_unlock(&id_priv->qp_mutex);
2900 memset(&event, 0, sizeof event);
2901 event.status = status;
2902 event.param.ud.private_data = mc->context;
2904 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2905 ib_init_ah_from_mcmember(id_priv->id.device,
2906 id_priv->id.port_num, &multicast->rec,
2907 &event.param.ud.ah_attr);
2908 event.param.ud.qp_num = 0xFFFFFF;
2909 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2911 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2913 ret = id_priv->id.event_handler(&id_priv->id, &event);
2915 cma_exch(id_priv, CMA_DESTROYING);
2916 mutex_unlock(&id_priv->handler_mutex);
2917 rdma_destroy_id(&id_priv->id);
2921 mutex_unlock(&id_priv->handler_mutex);
2925 static void cma_set_mgid(struct rdma_id_private *id_priv,
2926 struct sockaddr *addr, union ib_gid *mgid)
2928 unsigned char mc_map[MAX_ADDR_LEN];
2929 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2930 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2931 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2933 if (cma_any_addr(addr)) {
2934 memset(mgid, 0, sizeof *mgid);
2935 } else if ((addr->sa_family == AF_INET6) &&
2936 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
2938 /* IPv6 address is an SA assigned MGID. */
2939 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2940 } else if ((addr->sa_family == AF_INET6)) {
2941 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2942 if (id_priv->id.ps == RDMA_PS_UDP)
2943 mc_map[7] = 0x01; /* Use RDMA CM signature */
2944 *mgid = *(union ib_gid *) (mc_map + 4);
2946 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
2947 if (id_priv->id.ps == RDMA_PS_UDP)
2948 mc_map[7] = 0x01; /* Use RDMA CM signature */
2949 *mgid = *(union ib_gid *) (mc_map + 4);
2953 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2954 struct cma_multicast *mc)
2956 struct ib_sa_mcmember_rec rec;
2957 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2958 ib_sa_comp_mask comp_mask;
2961 ib_addr_get_mgid(dev_addr, &rec.mgid);
2962 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2967 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
2968 if (id_priv->id.ps == RDMA_PS_UDP)
2969 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2970 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
2971 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2974 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2975 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2976 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2977 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2978 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2980 if (id_priv->id.ps == RDMA_PS_IPOIB)
2981 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2982 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2984 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2985 id_priv->id.port_num, &rec,
2986 comp_mask, GFP_KERNEL,
2987 cma_ib_mc_handler, mc);
2988 if (IS_ERR(mc->multicast.ib))
2989 return PTR_ERR(mc->multicast.ib);
2994 static void iboe_mcast_work_handler(struct work_struct *work)
2996 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
2997 struct cma_multicast *mc = mw->mc;
2998 struct ib_sa_multicast *m = mc->multicast.ib;
3000 mc->multicast.ib->context = mc;
3001 cma_ib_mc_handler(0, m);
3002 kref_put(&mc->mcref, release_mc);
3006 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3008 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3009 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3011 if (cma_any_addr(addr)) {
3012 memset(mgid, 0, sizeof *mgid);
3013 } else if (addr->sa_family == AF_INET6) {
3014 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3016 mgid->raw[0] = 0xff;
3017 mgid->raw[1] = 0x0e;
3026 mgid->raw[10] = 0xff;
3027 mgid->raw[11] = 0xff;
3028 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3032 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3033 struct cma_multicast *mc)
3035 struct iboe_mcast_work *work;
3036 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3038 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3039 struct net_device *ndev = NULL;
3041 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3044 work = kzalloc(sizeof *work, GFP_KERNEL);
3048 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3049 if (!mc->multicast.ib) {
3054 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3056 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3057 if (id_priv->id.ps == RDMA_PS_UDP)
3058 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3060 if (dev_addr->bound_dev_if)
3061 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3066 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3067 mc->multicast.ib->rec.hop_limit = 1;
3068 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3070 if (!mc->multicast.ib->rec.mtu) {
3074 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3077 INIT_WORK(&work->work, iboe_mcast_work_handler);
3078 kref_get(&mc->mcref);
3079 queue_work(cma_wq, &work->work);
3084 kfree(mc->multicast.ib);
3090 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3093 struct rdma_id_private *id_priv;
3094 struct cma_multicast *mc;
3097 id_priv = container_of(id, struct rdma_id_private, id);
3098 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
3099 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
3102 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3106 memcpy(&mc->addr, addr, ip_addr_size(addr));
3107 mc->context = context;
3108 mc->id_priv = id_priv;
3110 spin_lock(&id_priv->lock);
3111 list_add(&mc->list, &id_priv->mc_list);
3112 spin_unlock(&id_priv->lock);
3114 switch (rdma_node_get_transport(id->device->node_type)) {
3115 case RDMA_TRANSPORT_IB:
3116 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3117 case IB_LINK_LAYER_INFINIBAND:
3118 ret = cma_join_ib_multicast(id_priv, mc);
3120 case IB_LINK_LAYER_ETHERNET:
3121 kref_init(&mc->mcref);
3122 ret = cma_iboe_join_multicast(id_priv, mc);
3134 spin_lock_irq(&id_priv->lock);
3135 list_del(&mc->list);
3136 spin_unlock_irq(&id_priv->lock);
3141 EXPORT_SYMBOL(rdma_join_multicast);
3143 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3145 struct rdma_id_private *id_priv;
3146 struct cma_multicast *mc;
3148 id_priv = container_of(id, struct rdma_id_private, id);
3149 spin_lock_irq(&id_priv->lock);
3150 list_for_each_entry(mc, &id_priv->mc_list, list) {
3151 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3152 list_del(&mc->list);
3153 spin_unlock_irq(&id_priv->lock);
3156 ib_detach_mcast(id->qp,
3157 &mc->multicast.ib->rec.mgid,
3158 mc->multicast.ib->rec.mlid);
3159 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3160 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3161 case IB_LINK_LAYER_INFINIBAND:
3162 ib_sa_free_multicast(mc->multicast.ib);
3165 case IB_LINK_LAYER_ETHERNET:
3166 kref_put(&mc->mcref, release_mc);
3175 spin_unlock_irq(&id_priv->lock);
3177 EXPORT_SYMBOL(rdma_leave_multicast);
3179 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3181 struct rdma_dev_addr *dev_addr;
3182 struct cma_ndev_work *work;
3184 dev_addr = &id_priv->id.route.addr.dev_addr;
3186 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3187 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3188 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3189 ndev->name, &id_priv->id);
3190 work = kzalloc(sizeof *work, GFP_KERNEL);
3194 INIT_WORK(&work->work, cma_ndev_work_handler);
3196 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3197 atomic_inc(&id_priv->refcount);
3198 queue_work(cma_wq, &work->work);
3204 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3207 struct net_device *ndev = (struct net_device *)ctx;
3208 struct cma_device *cma_dev;
3209 struct rdma_id_private *id_priv;
3210 int ret = NOTIFY_DONE;
3212 if (dev_net(ndev) != &init_net)
3215 if (event != NETDEV_BONDING_FAILOVER)
3218 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3222 list_for_each_entry(cma_dev, &dev_list, list)
3223 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3224 ret = cma_netdev_change(ndev, id_priv);
3230 mutex_unlock(&lock);
3234 static struct notifier_block cma_nb = {
3235 .notifier_call = cma_netdev_callback
3238 static void cma_add_one(struct ib_device *device)
3240 struct cma_device *cma_dev;
3241 struct rdma_id_private *id_priv;
3243 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3247 cma_dev->device = device;
3249 init_completion(&cma_dev->comp);
3250 atomic_set(&cma_dev->refcount, 1);
3251 INIT_LIST_HEAD(&cma_dev->id_list);
3252 ib_set_client_data(device, &cma_client, cma_dev);
3255 list_add_tail(&cma_dev->list, &dev_list);
3256 list_for_each_entry(id_priv, &listen_any_list, list)
3257 cma_listen_on_dev(id_priv, cma_dev);
3258 mutex_unlock(&lock);
3261 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3263 struct rdma_cm_event event;
3264 enum cma_state state;
3267 /* Record that we want to remove the device */
3268 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
3269 if (state == CMA_DESTROYING)
3272 cma_cancel_operation(id_priv, state);
3273 mutex_lock(&id_priv->handler_mutex);
3275 /* Check for destruction from another callback. */
3276 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
3279 memset(&event, 0, sizeof event);
3280 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3281 ret = id_priv->id.event_handler(&id_priv->id, &event);
3283 mutex_unlock(&id_priv->handler_mutex);
3287 static void cma_process_remove(struct cma_device *cma_dev)
3289 struct rdma_id_private *id_priv;
3293 while (!list_empty(&cma_dev->id_list)) {
3294 id_priv = list_entry(cma_dev->id_list.next,
3295 struct rdma_id_private, list);
3297 list_del(&id_priv->listen_list);
3298 list_del_init(&id_priv->list);
3299 atomic_inc(&id_priv->refcount);
3300 mutex_unlock(&lock);
3302 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3303 cma_deref_id(id_priv);
3305 rdma_destroy_id(&id_priv->id);
3309 mutex_unlock(&lock);
3311 cma_deref_dev(cma_dev);
3312 wait_for_completion(&cma_dev->comp);
3315 static void cma_remove_one(struct ib_device *device)
3317 struct cma_device *cma_dev;
3319 cma_dev = ib_get_client_data(device, &cma_client);
3324 list_del(&cma_dev->list);
3325 mutex_unlock(&lock);
3327 cma_process_remove(cma_dev);
3331 static int __init cma_init(void)
3335 cma_wq = create_singlethread_workqueue("rdma_cm");
3339 ib_sa_register_client(&sa_client);
3340 rdma_addr_register_client(&addr_client);
3341 register_netdevice_notifier(&cma_nb);
3343 ret = ib_register_client(&cma_client);
3349 unregister_netdevice_notifier(&cma_nb);
3350 rdma_addr_unregister_client(&addr_client);
3351 ib_sa_unregister_client(&sa_client);
3352 destroy_workqueue(cma_wq);
3356 static void __exit cma_cleanup(void)
3358 ib_unregister_client(&cma_client);
3359 unregister_netdevice_notifier(&cma_nb);
3360 rdma_addr_unregister_client(&addr_client);
3361 ib_sa_unregister_client(&sa_client);
3362 destroy_workqueue(cma_wq);
3363 idr_destroy(&sdp_ps);
3364 idr_destroy(&tcp_ps);
3365 idr_destroy(&udp_ps);
3366 idr_destroy(&ipoib_ps);
3369 module_init(cma_init);
3370 module_exit(cma_cleanup);