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;
92 struct rdma_bind_list {
94 struct hlist_head owners;
99 * Device removal can occur at anytime, so we need extra handling to
100 * serialize notifying the user of device removal with other callbacks.
101 * We do this by disabling removal notification while a callback is in process,
102 * and reporting it after the callback completes.
104 struct rdma_id_private {
105 struct rdma_cm_id id;
107 struct rdma_bind_list *bind_list;
108 struct hlist_node node;
109 struct list_head list; /* listen_any_list or cma_device.list */
110 struct list_head listen_list; /* per device listens */
111 struct cma_device *cma_dev;
112 struct list_head mc_list;
115 enum rdma_cm_state state;
117 struct mutex qp_mutex;
119 struct completion comp;
121 struct mutex handler_mutex;
125 struct ib_sa_query *query;
140 struct cma_multicast {
141 struct rdma_id_private *id_priv;
143 struct ib_sa_multicast *ib;
145 struct list_head list;
147 struct sockaddr_storage addr;
152 struct work_struct work;
153 struct rdma_id_private *id;
154 enum rdma_cm_state old_state;
155 enum rdma_cm_state new_state;
156 struct rdma_cm_event event;
159 struct cma_ndev_work {
160 struct work_struct work;
161 struct rdma_id_private *id;
162 struct rdma_cm_event event;
165 struct iboe_mcast_work {
166 struct work_struct work;
167 struct rdma_id_private *id;
168 struct cma_multicast *mc;
181 u8 ip_version; /* IP version: 7:4 */
183 union cma_ip_addr src_addr;
184 union cma_ip_addr dst_addr;
189 u8 sdp_version; /* Major version: 7:4 */
190 u8 ip_version; /* IP version: 7:4 */
191 u8 sdp_specific1[10];
193 __be16 sdp_specific2;
194 union cma_ip_addr src_addr;
195 union cma_ip_addr dst_addr;
203 #define CMA_VERSION 0x00
204 #define SDP_MAJ_VERSION 0x2
206 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
211 spin_lock_irqsave(&id_priv->lock, flags);
212 ret = (id_priv->state == comp);
213 spin_unlock_irqrestore(&id_priv->lock, flags);
217 static int cma_comp_exch(struct rdma_id_private *id_priv,
218 enum rdma_cm_state comp, enum rdma_cm_state exch)
223 spin_lock_irqsave(&id_priv->lock, flags);
224 if ((ret = (id_priv->state == comp)))
225 id_priv->state = exch;
226 spin_unlock_irqrestore(&id_priv->lock, flags);
230 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
231 enum rdma_cm_state exch)
234 enum rdma_cm_state old;
236 spin_lock_irqsave(&id_priv->lock, flags);
237 old = id_priv->state;
238 id_priv->state = exch;
239 spin_unlock_irqrestore(&id_priv->lock, flags);
243 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
245 return hdr->ip_version >> 4;
248 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
250 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
253 static inline u8 sdp_get_majv(u8 sdp_version)
255 return sdp_version >> 4;
258 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
260 return hh->ip_version >> 4;
263 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
265 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
268 static inline int cma_is_ud_ps(enum rdma_port_space ps)
270 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
273 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
274 struct cma_device *cma_dev)
276 atomic_inc(&cma_dev->refcount);
277 id_priv->cma_dev = cma_dev;
278 id_priv->id.device = cma_dev->device;
279 id_priv->id.route.addr.dev_addr.transport =
280 rdma_node_get_transport(cma_dev->device->node_type);
281 list_add_tail(&id_priv->list, &cma_dev->id_list);
284 static inline void cma_deref_dev(struct cma_device *cma_dev)
286 if (atomic_dec_and_test(&cma_dev->refcount))
287 complete(&cma_dev->comp);
290 static inline void release_mc(struct kref *kref)
292 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
294 kfree(mc->multicast.ib);
298 static void cma_release_dev(struct rdma_id_private *id_priv)
301 list_del(&id_priv->list);
302 cma_deref_dev(id_priv->cma_dev);
303 id_priv->cma_dev = NULL;
307 static int cma_set_qkey(struct rdma_id_private *id_priv)
309 struct ib_sa_mcmember_rec rec;
315 switch (id_priv->id.ps) {
317 id_priv->qkey = RDMA_UDP_QKEY;
320 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
321 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
322 id_priv->id.port_num, &rec.mgid,
325 id_priv->qkey = be32_to_cpu(rec.qkey);
333 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
337 struct ib_port_attr props;
340 err = ib_query_port(device, port_num, &props);
344 for (i = 0; i < props.gid_tbl_len; ++i) {
345 err = ib_query_gid(device, port_num, i, &tmp);
348 if (!memcmp(&tmp, gid, sizeof tmp))
355 static int cma_acquire_dev(struct rdma_id_private *id_priv)
357 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
358 struct cma_device *cma_dev;
359 union ib_gid gid, iboe_gid;
362 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
363 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
366 iboe_addr_get_sgid(dev_addr, &iboe_gid);
367 memcpy(&gid, dev_addr->src_dev_addr +
368 rdma_addr_gid_offset(dev_addr), sizeof gid);
369 list_for_each_entry(cma_dev, &dev_list, list) {
370 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
371 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
372 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
373 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
374 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
376 ret = find_gid_port(cma_dev->device, &gid, port);
379 id_priv->id.port_num = port;
389 cma_attach_to_dev(id_priv, cma_dev);
395 static void cma_deref_id(struct rdma_id_private *id_priv)
397 if (atomic_dec_and_test(&id_priv->refcount))
398 complete(&id_priv->comp);
401 static int cma_disable_callback(struct rdma_id_private *id_priv,
402 enum rdma_cm_state state)
404 mutex_lock(&id_priv->handler_mutex);
405 if (id_priv->state != state) {
406 mutex_unlock(&id_priv->handler_mutex);
412 static int cma_has_cm_dev(struct rdma_id_private *id_priv)
414 return (id_priv->id.device && id_priv->cm_id.ib);
417 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
418 void *context, enum rdma_port_space ps)
420 struct rdma_id_private *id_priv;
422 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
424 return ERR_PTR(-ENOMEM);
426 id_priv->state = RDMA_CM_IDLE;
427 id_priv->id.context = context;
428 id_priv->id.event_handler = event_handler;
430 spin_lock_init(&id_priv->lock);
431 mutex_init(&id_priv->qp_mutex);
432 init_completion(&id_priv->comp);
433 atomic_set(&id_priv->refcount, 1);
434 mutex_init(&id_priv->handler_mutex);
435 INIT_LIST_HEAD(&id_priv->listen_list);
436 INIT_LIST_HEAD(&id_priv->mc_list);
437 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
441 EXPORT_SYMBOL(rdma_create_id);
443 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
445 struct ib_qp_attr qp_attr;
446 int qp_attr_mask, ret;
448 qp_attr.qp_state = IB_QPS_INIT;
449 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
453 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
457 qp_attr.qp_state = IB_QPS_RTR;
458 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
462 qp_attr.qp_state = IB_QPS_RTS;
464 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
469 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
471 struct ib_qp_attr qp_attr;
472 int qp_attr_mask, ret;
474 qp_attr.qp_state = IB_QPS_INIT;
475 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
479 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
482 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
483 struct ib_qp_init_attr *qp_init_attr)
485 struct rdma_id_private *id_priv;
489 id_priv = container_of(id, struct rdma_id_private, id);
490 if (id->device != pd->device)
493 qp = ib_create_qp(pd, qp_init_attr);
497 if (cma_is_ud_ps(id_priv->id.ps))
498 ret = cma_init_ud_qp(id_priv, qp);
500 ret = cma_init_conn_qp(id_priv, qp);
505 id_priv->qp_num = qp->qp_num;
506 id_priv->srq = (qp->srq != NULL);
512 EXPORT_SYMBOL(rdma_create_qp);
514 void rdma_destroy_qp(struct rdma_cm_id *id)
516 struct rdma_id_private *id_priv;
518 id_priv = container_of(id, struct rdma_id_private, id);
519 mutex_lock(&id_priv->qp_mutex);
520 ib_destroy_qp(id_priv->id.qp);
521 id_priv->id.qp = NULL;
522 mutex_unlock(&id_priv->qp_mutex);
524 EXPORT_SYMBOL(rdma_destroy_qp);
526 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
527 struct rdma_conn_param *conn_param)
529 struct ib_qp_attr qp_attr;
530 int qp_attr_mask, ret;
532 mutex_lock(&id_priv->qp_mutex);
533 if (!id_priv->id.qp) {
538 /* Need to update QP attributes from default values. */
539 qp_attr.qp_state = IB_QPS_INIT;
540 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
544 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
548 qp_attr.qp_state = IB_QPS_RTR;
549 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
554 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
555 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
557 mutex_unlock(&id_priv->qp_mutex);
561 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
562 struct rdma_conn_param *conn_param)
564 struct ib_qp_attr qp_attr;
565 int qp_attr_mask, ret;
567 mutex_lock(&id_priv->qp_mutex);
568 if (!id_priv->id.qp) {
573 qp_attr.qp_state = IB_QPS_RTS;
574 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
579 qp_attr.max_rd_atomic = conn_param->initiator_depth;
580 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
582 mutex_unlock(&id_priv->qp_mutex);
586 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
588 struct ib_qp_attr qp_attr;
591 mutex_lock(&id_priv->qp_mutex);
592 if (!id_priv->id.qp) {
597 qp_attr.qp_state = IB_QPS_ERR;
598 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
600 mutex_unlock(&id_priv->qp_mutex);
604 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
605 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
607 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
611 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
612 IB_LINK_LAYER_INFINIBAND)
613 pkey = ib_addr_get_pkey(dev_addr);
617 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
618 pkey, &qp_attr->pkey_index);
622 qp_attr->port_num = id_priv->id.port_num;
623 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
625 if (cma_is_ud_ps(id_priv->id.ps)) {
626 ret = cma_set_qkey(id_priv);
630 qp_attr->qkey = id_priv->qkey;
631 *qp_attr_mask |= IB_QP_QKEY;
633 qp_attr->qp_access_flags = 0;
634 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
639 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
642 struct rdma_id_private *id_priv;
645 id_priv = container_of(id, struct rdma_id_private, id);
646 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
647 case RDMA_TRANSPORT_IB:
648 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
649 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
651 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
653 if (qp_attr->qp_state == IB_QPS_RTR)
654 qp_attr->rq_psn = id_priv->seq_num;
656 case RDMA_TRANSPORT_IWARP:
657 if (!id_priv->cm_id.iw) {
658 qp_attr->qp_access_flags = 0;
659 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
661 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
671 EXPORT_SYMBOL(rdma_init_qp_attr);
673 static inline int cma_zero_addr(struct sockaddr *addr)
675 struct in6_addr *ip6;
677 if (addr->sa_family == AF_INET)
678 return ipv4_is_zeronet(
679 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
681 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
682 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
683 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
687 static inline int cma_loopback_addr(struct sockaddr *addr)
689 if (addr->sa_family == AF_INET)
690 return ipv4_is_loopback(
691 ((struct sockaddr_in *) addr)->sin_addr.s_addr);
693 return ipv6_addr_loopback(
694 &((struct sockaddr_in6 *) addr)->sin6_addr);
697 static inline int cma_any_addr(struct sockaddr *addr)
699 return cma_zero_addr(addr) || cma_loopback_addr(addr);
702 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
704 if (src->sa_family != dst->sa_family)
707 switch (src->sa_family) {
709 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
710 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
712 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
713 &((struct sockaddr_in6 *) dst)->sin6_addr);
717 static inline __be16 cma_port(struct sockaddr *addr)
719 if (addr->sa_family == AF_INET)
720 return ((struct sockaddr_in *) addr)->sin_port;
722 return ((struct sockaddr_in6 *) addr)->sin6_port;
725 static inline int cma_any_port(struct sockaddr *addr)
727 return !cma_port(addr);
730 static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
731 u8 *ip_ver, __be16 *port,
732 union cma_ip_addr **src, union cma_ip_addr **dst)
736 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
740 *ip_ver = sdp_get_ip_ver(hdr);
741 *port = ((struct sdp_hh *) hdr)->port;
742 *src = &((struct sdp_hh *) hdr)->src_addr;
743 *dst = &((struct sdp_hh *) hdr)->dst_addr;
746 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
749 *ip_ver = cma_get_ip_ver(hdr);
750 *port = ((struct cma_hdr *) hdr)->port;
751 *src = &((struct cma_hdr *) hdr)->src_addr;
752 *dst = &((struct cma_hdr *) hdr)->dst_addr;
756 if (*ip_ver != 4 && *ip_ver != 6)
761 static void cma_save_net_info(struct rdma_addr *addr,
762 struct rdma_addr *listen_addr,
763 u8 ip_ver, __be16 port,
764 union cma_ip_addr *src, union cma_ip_addr *dst)
766 struct sockaddr_in *listen4, *ip4;
767 struct sockaddr_in6 *listen6, *ip6;
771 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
772 ip4 = (struct sockaddr_in *) &addr->src_addr;
773 ip4->sin_family = listen4->sin_family;
774 ip4->sin_addr.s_addr = dst->ip4.addr;
775 ip4->sin_port = listen4->sin_port;
777 ip4 = (struct sockaddr_in *) &addr->dst_addr;
778 ip4->sin_family = listen4->sin_family;
779 ip4->sin_addr.s_addr = src->ip4.addr;
780 ip4->sin_port = port;
783 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
784 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
785 ip6->sin6_family = listen6->sin6_family;
786 ip6->sin6_addr = dst->ip6;
787 ip6->sin6_port = listen6->sin6_port;
789 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
790 ip6->sin6_family = listen6->sin6_family;
791 ip6->sin6_addr = src->ip6;
792 ip6->sin6_port = port;
799 static inline int cma_user_data_offset(enum rdma_port_space ps)
805 return sizeof(struct cma_hdr);
809 static void cma_cancel_route(struct rdma_id_private *id_priv)
811 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
812 case IB_LINK_LAYER_INFINIBAND:
814 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
821 static void cma_cancel_listens(struct rdma_id_private *id_priv)
823 struct rdma_id_private *dev_id_priv;
826 * Remove from listen_any_list to prevent added devices from spawning
827 * additional listen requests.
830 list_del(&id_priv->list);
832 while (!list_empty(&id_priv->listen_list)) {
833 dev_id_priv = list_entry(id_priv->listen_list.next,
834 struct rdma_id_private, listen_list);
835 /* sync with device removal to avoid duplicate destruction */
836 list_del_init(&dev_id_priv->list);
837 list_del(&dev_id_priv->listen_list);
840 rdma_destroy_id(&dev_id_priv->id);
846 static void cma_cancel_operation(struct rdma_id_private *id_priv,
847 enum rdma_cm_state state)
850 case RDMA_CM_ADDR_QUERY:
851 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
853 case RDMA_CM_ROUTE_QUERY:
854 cma_cancel_route(id_priv);
857 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
858 && !id_priv->cma_dev)
859 cma_cancel_listens(id_priv);
866 static void cma_release_port(struct rdma_id_private *id_priv)
868 struct rdma_bind_list *bind_list = id_priv->bind_list;
874 hlist_del(&id_priv->node);
875 if (hlist_empty(&bind_list->owners)) {
876 idr_remove(bind_list->ps, bind_list->port);
882 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
884 struct cma_multicast *mc;
886 while (!list_empty(&id_priv->mc_list)) {
887 mc = container_of(id_priv->mc_list.next,
888 struct cma_multicast, list);
890 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
891 case IB_LINK_LAYER_INFINIBAND:
892 ib_sa_free_multicast(mc->multicast.ib);
895 case IB_LINK_LAYER_ETHERNET:
896 kref_put(&mc->mcref, release_mc);
904 void rdma_destroy_id(struct rdma_cm_id *id)
906 struct rdma_id_private *id_priv;
907 enum rdma_cm_state state;
909 id_priv = container_of(id, struct rdma_id_private, id);
910 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
911 cma_cancel_operation(id_priv, state);
914 * Wait for any active callback to finish. New callbacks will find
915 * the id_priv state set to destroying and abort.
917 mutex_lock(&id_priv->handler_mutex);
918 mutex_unlock(&id_priv->handler_mutex);
920 if (id_priv->cma_dev) {
921 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
922 case RDMA_TRANSPORT_IB:
923 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
924 ib_destroy_cm_id(id_priv->cm_id.ib);
926 case RDMA_TRANSPORT_IWARP:
927 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
928 iw_destroy_cm_id(id_priv->cm_id.iw);
933 cma_leave_mc_groups(id_priv);
934 cma_release_dev(id_priv);
937 cma_release_port(id_priv);
938 cma_deref_id(id_priv);
939 wait_for_completion(&id_priv->comp);
941 if (id_priv->internal_id)
942 cma_deref_id(id_priv->id.context);
944 kfree(id_priv->id.route.path_rec);
947 EXPORT_SYMBOL(rdma_destroy_id);
949 static int cma_rep_recv(struct rdma_id_private *id_priv)
953 ret = cma_modify_qp_rtr(id_priv, NULL);
957 ret = cma_modify_qp_rts(id_priv, NULL);
961 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
967 cma_modify_qp_err(id_priv);
968 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
973 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
975 if (id_priv->id.ps == RDMA_PS_SDP &&
976 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
983 static void cma_set_rep_event_data(struct rdma_cm_event *event,
984 struct ib_cm_rep_event_param *rep_data,
987 event->param.conn.private_data = private_data;
988 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
989 event->param.conn.responder_resources = rep_data->responder_resources;
990 event->param.conn.initiator_depth = rep_data->initiator_depth;
991 event->param.conn.flow_control = rep_data->flow_control;
992 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
993 event->param.conn.srq = rep_data->srq;
994 event->param.conn.qp_num = rep_data->remote_qpn;
997 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
999 struct rdma_id_private *id_priv = cm_id->context;
1000 struct rdma_cm_event event;
1003 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1004 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1005 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1006 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1009 memset(&event, 0, sizeof event);
1010 switch (ib_event->event) {
1011 case IB_CM_REQ_ERROR:
1012 case IB_CM_REP_ERROR:
1013 event.event = RDMA_CM_EVENT_UNREACHABLE;
1014 event.status = -ETIMEDOUT;
1016 case IB_CM_REP_RECEIVED:
1017 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1019 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1020 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
1021 event.status = cma_rep_recv(id_priv);
1022 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1023 RDMA_CM_EVENT_ESTABLISHED;
1025 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1026 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1027 ib_event->private_data);
1029 case IB_CM_RTU_RECEIVED:
1030 case IB_CM_USER_ESTABLISHED:
1031 event.event = RDMA_CM_EVENT_ESTABLISHED;
1033 case IB_CM_DREQ_ERROR:
1034 event.status = -ETIMEDOUT; /* fall through */
1035 case IB_CM_DREQ_RECEIVED:
1036 case IB_CM_DREP_RECEIVED:
1037 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1038 RDMA_CM_DISCONNECT))
1040 event.event = RDMA_CM_EVENT_DISCONNECTED;
1042 case IB_CM_TIMEWAIT_EXIT:
1043 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1045 case IB_CM_MRA_RECEIVED:
1048 case IB_CM_REJ_RECEIVED:
1049 cma_modify_qp_err(id_priv);
1050 event.status = ib_event->param.rej_rcvd.reason;
1051 event.event = RDMA_CM_EVENT_REJECTED;
1052 event.param.conn.private_data = ib_event->private_data;
1053 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1056 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1061 ret = id_priv->id.event_handler(&id_priv->id, &event);
1063 /* Destroy the CM ID by returning a non-zero value. */
1064 id_priv->cm_id.ib = NULL;
1065 cma_exch(id_priv, RDMA_CM_DESTROYING);
1066 mutex_unlock(&id_priv->handler_mutex);
1067 rdma_destroy_id(&id_priv->id);
1071 mutex_unlock(&id_priv->handler_mutex);
1075 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1076 struct ib_cm_event *ib_event)
1078 struct rdma_id_private *id_priv;
1079 struct rdma_cm_id *id;
1080 struct rdma_route *rt;
1081 union cma_ip_addr *src, *dst;
1086 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1087 &ip_ver, &port, &src, &dst))
1090 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1095 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1096 ip_ver, port, src, dst);
1099 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1100 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1105 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1106 if (rt->num_paths == 2)
1107 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1109 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1110 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1111 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1112 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1114 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1115 &rt->addr.dev_addr);
1119 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1121 id_priv = container_of(id, struct rdma_id_private, id);
1122 id_priv->state = RDMA_CM_CONNECT;
1126 rdma_destroy_id(id);
1131 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1132 struct ib_cm_event *ib_event)
1134 struct rdma_id_private *id_priv;
1135 struct rdma_cm_id *id;
1136 union cma_ip_addr *src, *dst;
1141 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1147 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1148 &ip_ver, &port, &src, &dst))
1151 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1152 ip_ver, port, src, dst);
1154 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1155 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1156 &id->route.addr.dev_addr);
1161 id_priv = container_of(id, struct rdma_id_private, id);
1162 id_priv->state = RDMA_CM_CONNECT;
1165 rdma_destroy_id(id);
1169 static void cma_set_req_event_data(struct rdma_cm_event *event,
1170 struct ib_cm_req_event_param *req_data,
1171 void *private_data, int offset)
1173 event->param.conn.private_data = private_data + offset;
1174 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1175 event->param.conn.responder_resources = req_data->responder_resources;
1176 event->param.conn.initiator_depth = req_data->initiator_depth;
1177 event->param.conn.flow_control = req_data->flow_control;
1178 event->param.conn.retry_count = req_data->retry_count;
1179 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1180 event->param.conn.srq = req_data->srq;
1181 event->param.conn.qp_num = req_data->remote_qpn;
1184 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1186 struct rdma_id_private *listen_id, *conn_id;
1187 struct rdma_cm_event event;
1190 listen_id = cm_id->context;
1191 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1192 return -ECONNABORTED;
1194 memset(&event, 0, sizeof event);
1195 offset = cma_user_data_offset(listen_id->id.ps);
1196 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1197 if (cma_is_ud_ps(listen_id->id.ps)) {
1198 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1199 event.param.ud.private_data = ib_event->private_data + offset;
1200 event.param.ud.private_data_len =
1201 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1203 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1204 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1205 ib_event->private_data, offset);
1212 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1213 ret = cma_acquire_dev(conn_id);
1215 goto release_conn_id;
1217 conn_id->cm_id.ib = cm_id;
1218 cm_id->context = conn_id;
1219 cm_id->cm_handler = cma_ib_handler;
1222 * Protect against the user destroying conn_id from another thread
1223 * until we're done accessing it.
1225 atomic_inc(&conn_id->refcount);
1226 ret = conn_id->id.event_handler(&conn_id->id, &event);
1229 * Acquire mutex to prevent user executing rdma_destroy_id()
1230 * while we're accessing the cm_id.
1233 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1234 !cma_is_ud_ps(conn_id->id.ps))
1235 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1236 mutex_unlock(&lock);
1237 mutex_unlock(&conn_id->handler_mutex);
1238 cma_deref_id(conn_id);
1241 cma_deref_id(conn_id);
1243 /* Destroy the CM ID by returning a non-zero value. */
1244 conn_id->cm_id.ib = NULL;
1247 cma_exch(conn_id, RDMA_CM_DESTROYING);
1248 mutex_unlock(&conn_id->handler_mutex);
1249 rdma_destroy_id(&conn_id->id);
1252 mutex_unlock(&listen_id->handler_mutex);
1256 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1258 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1261 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1262 struct ib_cm_compare_data *compare)
1264 struct cma_hdr *cma_data, *cma_mask;
1265 struct sdp_hh *sdp_data, *sdp_mask;
1267 struct in6_addr ip6_addr;
1269 memset(compare, 0, sizeof *compare);
1270 cma_data = (void *) compare->data;
1271 cma_mask = (void *) compare->mask;
1272 sdp_data = (void *) compare->data;
1273 sdp_mask = (void *) compare->mask;
1275 switch (addr->sa_family) {
1277 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1278 if (ps == RDMA_PS_SDP) {
1279 sdp_set_ip_ver(sdp_data, 4);
1280 sdp_set_ip_ver(sdp_mask, 0xF);
1281 sdp_data->dst_addr.ip4.addr = ip4_addr;
1282 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1284 cma_set_ip_ver(cma_data, 4);
1285 cma_set_ip_ver(cma_mask, 0xF);
1286 cma_data->dst_addr.ip4.addr = ip4_addr;
1287 cma_mask->dst_addr.ip4.addr = htonl(~0);
1291 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1292 if (ps == RDMA_PS_SDP) {
1293 sdp_set_ip_ver(sdp_data, 6);
1294 sdp_set_ip_ver(sdp_mask, 0xF);
1295 sdp_data->dst_addr.ip6 = ip6_addr;
1296 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1297 sizeof sdp_mask->dst_addr.ip6);
1299 cma_set_ip_ver(cma_data, 6);
1300 cma_set_ip_ver(cma_mask, 0xF);
1301 cma_data->dst_addr.ip6 = ip6_addr;
1302 memset(&cma_mask->dst_addr.ip6, 0xFF,
1303 sizeof cma_mask->dst_addr.ip6);
1311 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1313 struct rdma_id_private *id_priv = iw_id->context;
1314 struct rdma_cm_event event;
1315 struct sockaddr_in *sin;
1318 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1321 memset(&event, 0, sizeof event);
1322 switch (iw_event->event) {
1323 case IW_CM_EVENT_CLOSE:
1324 event.event = RDMA_CM_EVENT_DISCONNECTED;
1326 case IW_CM_EVENT_CONNECT_REPLY:
1327 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1328 *sin = iw_event->local_addr;
1329 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1330 *sin = iw_event->remote_addr;
1331 switch (iw_event->status) {
1333 event.event = RDMA_CM_EVENT_ESTABLISHED;
1337 event.event = RDMA_CM_EVENT_REJECTED;
1340 event.event = RDMA_CM_EVENT_UNREACHABLE;
1343 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1347 case IW_CM_EVENT_ESTABLISHED:
1348 event.event = RDMA_CM_EVENT_ESTABLISHED;
1354 event.status = iw_event->status;
1355 event.param.conn.private_data = iw_event->private_data;
1356 event.param.conn.private_data_len = iw_event->private_data_len;
1357 ret = id_priv->id.event_handler(&id_priv->id, &event);
1359 /* Destroy the CM ID by returning a non-zero value. */
1360 id_priv->cm_id.iw = NULL;
1361 cma_exch(id_priv, RDMA_CM_DESTROYING);
1362 mutex_unlock(&id_priv->handler_mutex);
1363 rdma_destroy_id(&id_priv->id);
1367 mutex_unlock(&id_priv->handler_mutex);
1371 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1372 struct iw_cm_event *iw_event)
1374 struct rdma_cm_id *new_cm_id;
1375 struct rdma_id_private *listen_id, *conn_id;
1376 struct sockaddr_in *sin;
1377 struct net_device *dev = NULL;
1378 struct rdma_cm_event event;
1380 struct ib_device_attr attr;
1382 listen_id = cm_id->context;
1383 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1384 return -ECONNABORTED;
1386 /* Create a new RDMA id for the new IW CM ID */
1387 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1388 listen_id->id.context,
1390 if (IS_ERR(new_cm_id)) {
1394 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1395 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1396 conn_id->state = RDMA_CM_CONNECT;
1398 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1400 ret = -EADDRNOTAVAIL;
1401 mutex_unlock(&conn_id->handler_mutex);
1402 rdma_destroy_id(new_cm_id);
1405 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1407 mutex_unlock(&conn_id->handler_mutex);
1408 rdma_destroy_id(new_cm_id);
1412 ret = cma_acquire_dev(conn_id);
1414 mutex_unlock(&conn_id->handler_mutex);
1415 rdma_destroy_id(new_cm_id);
1419 conn_id->cm_id.iw = cm_id;
1420 cm_id->context = conn_id;
1421 cm_id->cm_handler = cma_iw_handler;
1423 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1424 *sin = iw_event->local_addr;
1425 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1426 *sin = iw_event->remote_addr;
1428 ret = ib_query_device(conn_id->id.device, &attr);
1430 mutex_unlock(&conn_id->handler_mutex);
1431 rdma_destroy_id(new_cm_id);
1435 memset(&event, 0, sizeof event);
1436 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1437 event.param.conn.private_data = iw_event->private_data;
1438 event.param.conn.private_data_len = iw_event->private_data_len;
1439 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1440 event.param.conn.responder_resources = attr.max_qp_rd_atom;
1443 * Protect against the user destroying conn_id from another thread
1444 * until we're done accessing it.
1446 atomic_inc(&conn_id->refcount);
1447 ret = conn_id->id.event_handler(&conn_id->id, &event);
1449 /* User wants to destroy the CM ID */
1450 conn_id->cm_id.iw = NULL;
1451 cma_exch(conn_id, RDMA_CM_DESTROYING);
1452 mutex_unlock(&conn_id->handler_mutex);
1453 cma_deref_id(conn_id);
1454 rdma_destroy_id(&conn_id->id);
1458 mutex_unlock(&conn_id->handler_mutex);
1459 cma_deref_id(conn_id);
1464 mutex_unlock(&listen_id->handler_mutex);
1468 static int cma_ib_listen(struct rdma_id_private *id_priv)
1470 struct ib_cm_compare_data compare_data;
1471 struct sockaddr *addr;
1475 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1477 if (IS_ERR(id_priv->cm_id.ib))
1478 return PTR_ERR(id_priv->cm_id.ib);
1480 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1481 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1482 if (cma_any_addr(addr))
1483 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1485 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1486 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1490 ib_destroy_cm_id(id_priv->cm_id.ib);
1491 id_priv->cm_id.ib = NULL;
1497 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1500 struct sockaddr_in *sin;
1502 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1503 iw_conn_req_handler,
1505 if (IS_ERR(id_priv->cm_id.iw))
1506 return PTR_ERR(id_priv->cm_id.iw);
1508 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1509 id_priv->cm_id.iw->local_addr = *sin;
1511 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1514 iw_destroy_cm_id(id_priv->cm_id.iw);
1515 id_priv->cm_id.iw = NULL;
1521 static int cma_listen_handler(struct rdma_cm_id *id,
1522 struct rdma_cm_event *event)
1524 struct rdma_id_private *id_priv = id->context;
1526 id->context = id_priv->id.context;
1527 id->event_handler = id_priv->id.event_handler;
1528 return id_priv->id.event_handler(id, event);
1531 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1532 struct cma_device *cma_dev)
1534 struct rdma_id_private *dev_id_priv;
1535 struct rdma_cm_id *id;
1538 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1542 dev_id_priv = container_of(id, struct rdma_id_private, id);
1544 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1545 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1546 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1548 cma_attach_to_dev(dev_id_priv, cma_dev);
1549 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1550 atomic_inc(&id_priv->refcount);
1551 dev_id_priv->internal_id = 1;
1553 ret = rdma_listen(id, id_priv->backlog);
1555 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1556 "listening on device %s\n", ret, cma_dev->device->name);
1559 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1561 struct cma_device *cma_dev;
1564 list_add_tail(&id_priv->list, &listen_any_list);
1565 list_for_each_entry(cma_dev, &dev_list, list)
1566 cma_listen_on_dev(id_priv, cma_dev);
1567 mutex_unlock(&lock);
1570 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1572 struct rdma_id_private *id_priv;
1574 id_priv = container_of(id, struct rdma_id_private, id);
1575 id_priv->tos = (u8) tos;
1577 EXPORT_SYMBOL(rdma_set_service_type);
1579 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1582 struct cma_work *work = context;
1583 struct rdma_route *route;
1585 route = &work->id->id.route;
1588 route->num_paths = 1;
1589 *route->path_rec = *path_rec;
1591 work->old_state = RDMA_CM_ROUTE_QUERY;
1592 work->new_state = RDMA_CM_ADDR_RESOLVED;
1593 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1594 work->event.status = status;
1597 queue_work(cma_wq, &work->work);
1600 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1601 struct cma_work *work)
1603 struct rdma_addr *addr = &id_priv->id.route.addr;
1604 struct ib_sa_path_rec path_rec;
1605 ib_sa_comp_mask comp_mask;
1606 struct sockaddr_in6 *sin6;
1608 memset(&path_rec, 0, sizeof path_rec);
1609 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1610 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1611 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1612 path_rec.numb_path = 1;
1613 path_rec.reversible = 1;
1614 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1615 (struct sockaddr *) &addr->dst_addr);
1617 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1618 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1619 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1621 if (addr->src_addr.ss_family == AF_INET) {
1622 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1623 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1625 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1626 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1627 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1630 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1631 id_priv->id.port_num, &path_rec,
1632 comp_mask, timeout_ms,
1633 GFP_KERNEL, cma_query_handler,
1634 work, &id_priv->query);
1636 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1639 static void cma_work_handler(struct work_struct *_work)
1641 struct cma_work *work = container_of(_work, struct cma_work, work);
1642 struct rdma_id_private *id_priv = work->id;
1645 mutex_lock(&id_priv->handler_mutex);
1646 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1649 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1650 cma_exch(id_priv, RDMA_CM_DESTROYING);
1654 mutex_unlock(&id_priv->handler_mutex);
1655 cma_deref_id(id_priv);
1657 rdma_destroy_id(&id_priv->id);
1661 static void cma_ndev_work_handler(struct work_struct *_work)
1663 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1664 struct rdma_id_private *id_priv = work->id;
1667 mutex_lock(&id_priv->handler_mutex);
1668 if (id_priv->state == RDMA_CM_DESTROYING ||
1669 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1672 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1673 cma_exch(id_priv, RDMA_CM_DESTROYING);
1678 mutex_unlock(&id_priv->handler_mutex);
1679 cma_deref_id(id_priv);
1681 rdma_destroy_id(&id_priv->id);
1685 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1687 struct rdma_route *route = &id_priv->id.route;
1688 struct cma_work *work;
1691 work = kzalloc(sizeof *work, GFP_KERNEL);
1696 INIT_WORK(&work->work, cma_work_handler);
1697 work->old_state = RDMA_CM_ROUTE_QUERY;
1698 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1699 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1701 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1702 if (!route->path_rec) {
1707 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1713 kfree(route->path_rec);
1714 route->path_rec = NULL;
1720 int rdma_set_ib_paths(struct rdma_cm_id *id,
1721 struct ib_sa_path_rec *path_rec, int num_paths)
1723 struct rdma_id_private *id_priv;
1726 id_priv = container_of(id, struct rdma_id_private, id);
1727 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1728 RDMA_CM_ROUTE_RESOLVED))
1731 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1733 if (!id->route.path_rec) {
1738 id->route.num_paths = num_paths;
1741 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1744 EXPORT_SYMBOL(rdma_set_ib_paths);
1746 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1748 struct cma_work *work;
1750 work = kzalloc(sizeof *work, GFP_KERNEL);
1755 INIT_WORK(&work->work, cma_work_handler);
1756 work->old_state = RDMA_CM_ROUTE_QUERY;
1757 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1758 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1759 queue_work(cma_wq, &work->work);
1763 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1765 struct rdma_route *route = &id_priv->id.route;
1766 struct rdma_addr *addr = &route->addr;
1767 struct cma_work *work;
1769 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1770 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1771 struct net_device *ndev = NULL;
1774 if (src_addr->sin_family != dst_addr->sin_family)
1777 work = kzalloc(sizeof *work, GFP_KERNEL);
1782 INIT_WORK(&work->work, cma_work_handler);
1784 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1785 if (!route->path_rec) {
1790 route->num_paths = 1;
1792 if (addr->dev_addr.bound_dev_if)
1793 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1799 vid = rdma_vlan_dev_vlan_id(ndev);
1801 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1802 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1804 route->path_rec->hop_limit = 1;
1805 route->path_rec->reversible = 1;
1806 route->path_rec->pkey = cpu_to_be16(0xffff);
1807 route->path_rec->mtu_selector = IB_SA_EQ;
1808 route->path_rec->sl = id_priv->tos >> 5;
1810 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1811 route->path_rec->rate_selector = IB_SA_EQ;
1812 route->path_rec->rate = iboe_get_rate(ndev);
1814 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1815 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1816 if (!route->path_rec->mtu) {
1821 work->old_state = RDMA_CM_ROUTE_QUERY;
1822 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1823 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1824 work->event.status = 0;
1826 queue_work(cma_wq, &work->work);
1831 kfree(route->path_rec);
1832 route->path_rec = NULL;
1838 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1840 struct rdma_id_private *id_priv;
1843 id_priv = container_of(id, struct rdma_id_private, id);
1844 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1847 atomic_inc(&id_priv->refcount);
1848 switch (rdma_node_get_transport(id->device->node_type)) {
1849 case RDMA_TRANSPORT_IB:
1850 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1851 case IB_LINK_LAYER_INFINIBAND:
1852 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1854 case IB_LINK_LAYER_ETHERNET:
1855 ret = cma_resolve_iboe_route(id_priv);
1861 case RDMA_TRANSPORT_IWARP:
1862 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1873 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1874 cma_deref_id(id_priv);
1877 EXPORT_SYMBOL(rdma_resolve_route);
1879 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1881 struct cma_device *cma_dev;
1882 struct ib_port_attr port_attr;
1889 if (list_empty(&dev_list)) {
1893 list_for_each_entry(cma_dev, &dev_list, list)
1894 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1895 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1896 port_attr.state == IB_PORT_ACTIVE)
1900 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1903 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1907 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1911 id_priv->id.route.addr.dev_addr.dev_type =
1912 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1913 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1915 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1916 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1917 id_priv->id.port_num = p;
1918 cma_attach_to_dev(id_priv, cma_dev);
1920 mutex_unlock(&lock);
1924 static void addr_handler(int status, struct sockaddr *src_addr,
1925 struct rdma_dev_addr *dev_addr, void *context)
1927 struct rdma_id_private *id_priv = context;
1928 struct rdma_cm_event event;
1930 memset(&event, 0, sizeof event);
1931 mutex_lock(&id_priv->handler_mutex);
1932 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
1933 RDMA_CM_ADDR_RESOLVED))
1936 if (!status && !id_priv->cma_dev)
1937 status = cma_acquire_dev(id_priv);
1940 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1941 RDMA_CM_ADDR_BOUND))
1943 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1944 event.status = status;
1946 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1947 ip_addr_size(src_addr));
1948 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1951 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1952 cma_exch(id_priv, RDMA_CM_DESTROYING);
1953 mutex_unlock(&id_priv->handler_mutex);
1954 cma_deref_id(id_priv);
1955 rdma_destroy_id(&id_priv->id);
1959 mutex_unlock(&id_priv->handler_mutex);
1960 cma_deref_id(id_priv);
1963 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1965 struct cma_work *work;
1966 struct sockaddr *src, *dst;
1970 work = kzalloc(sizeof *work, GFP_KERNEL);
1974 if (!id_priv->cma_dev) {
1975 ret = cma_bind_loopback(id_priv);
1980 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1981 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
1983 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1984 if (cma_zero_addr(src)) {
1985 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
1986 if ((src->sa_family = dst->sa_family) == AF_INET) {
1987 ((struct sockaddr_in *) src)->sin_addr.s_addr =
1988 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1990 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
1991 &((struct sockaddr_in6 *) dst)->sin6_addr);
1996 INIT_WORK(&work->work, cma_work_handler);
1997 work->old_state = RDMA_CM_ADDR_QUERY;
1998 work->new_state = RDMA_CM_ADDR_RESOLVED;
1999 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2000 queue_work(cma_wq, &work->work);
2007 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2008 struct sockaddr *dst_addr)
2010 if (!src_addr || !src_addr->sa_family) {
2011 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2012 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2013 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2014 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2017 return rdma_bind_addr(id, src_addr);
2020 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2021 struct sockaddr *dst_addr, int timeout_ms)
2023 struct rdma_id_private *id_priv;
2026 id_priv = container_of(id, struct rdma_id_private, id);
2027 if (id_priv->state == RDMA_CM_IDLE) {
2028 ret = cma_bind_addr(id, src_addr, dst_addr);
2033 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2036 atomic_inc(&id_priv->refcount);
2037 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2038 if (cma_any_addr(dst_addr))
2039 ret = cma_resolve_loopback(id_priv);
2041 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2042 dst_addr, &id->route.addr.dev_addr,
2043 timeout_ms, addr_handler, id_priv);
2049 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2050 cma_deref_id(id_priv);
2053 EXPORT_SYMBOL(rdma_resolve_addr);
2055 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2057 struct rdma_id_private *id_priv;
2058 unsigned long flags;
2061 id_priv = container_of(id, struct rdma_id_private, id);
2062 spin_lock_irqsave(&id_priv->lock, flags);
2063 if (id_priv->state == RDMA_CM_IDLE) {
2064 id_priv->reuseaddr = reuse;
2069 spin_unlock_irqrestore(&id_priv->lock, flags);
2072 EXPORT_SYMBOL(rdma_set_reuseaddr);
2074 static void cma_bind_port(struct rdma_bind_list *bind_list,
2075 struct rdma_id_private *id_priv)
2077 struct sockaddr_in *sin;
2079 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2080 sin->sin_port = htons(bind_list->port);
2081 id_priv->bind_list = bind_list;
2082 hlist_add_head(&id_priv->node, &bind_list->owners);
2085 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2086 unsigned short snum)
2088 struct rdma_bind_list *bind_list;
2091 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2096 ret = idr_get_new_above(ps, bind_list, snum, &port);
2097 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2103 ret = -EADDRNOTAVAIL;
2108 bind_list->port = (unsigned short) port;
2109 cma_bind_port(bind_list, id_priv);
2112 idr_remove(ps, port);
2118 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2120 static unsigned int last_used_port;
2121 int low, high, remaining;
2124 inet_get_local_port_range(&low, &high);
2125 remaining = (high - low) + 1;
2126 rover = net_random() % remaining + low;
2128 if (last_used_port != rover &&
2129 !idr_find(ps, (unsigned short) rover)) {
2130 int ret = cma_alloc_port(ps, id_priv, rover);
2132 * Remember previously used port number in order to avoid
2133 * re-using same port immediately after it is closed.
2136 last_used_port = rover;
2137 if (ret != -EADDRNOTAVAIL)
2142 if ((rover < low) || (rover > high))
2146 return -EADDRNOTAVAIL;
2150 * Check that the requested port is available. This is called when trying to
2151 * bind to a specific port, or when trying to listen on a bound port. In
2152 * the latter case, the provided id_priv may already be on the bind_list, but
2153 * we still need to check that it's okay to start listening.
2155 static int cma_check_port(struct rdma_bind_list *bind_list,
2156 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2158 struct rdma_id_private *cur_id;
2159 struct sockaddr *addr, *cur_addr;
2160 struct hlist_node *node;
2162 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2163 if (cma_any_addr(addr) && !reuseaddr)
2164 return -EADDRNOTAVAIL;
2166 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2167 if (id_priv == cur_id)
2170 if ((cur_id->state == RDMA_CM_LISTEN) ||
2171 !reuseaddr || !cur_id->reuseaddr) {
2172 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2173 if (cma_any_addr(cur_addr))
2174 return -EADDRNOTAVAIL;
2176 if (!cma_addr_cmp(addr, cur_addr))
2183 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2185 struct rdma_bind_list *bind_list;
2186 unsigned short snum;
2189 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2190 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2193 bind_list = idr_find(ps, snum);
2195 ret = cma_alloc_port(ps, id_priv, snum);
2197 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2199 cma_bind_port(bind_list, id_priv);
2204 static int cma_bind_listen(struct rdma_id_private *id_priv)
2206 struct rdma_bind_list *bind_list = id_priv->bind_list;
2210 if (bind_list->owners.first->next)
2211 ret = cma_check_port(bind_list, id_priv, 0);
2212 mutex_unlock(&lock);
2216 static int cma_get_port(struct rdma_id_private *id_priv)
2221 switch (id_priv->id.ps) {
2235 return -EPROTONOSUPPORT;
2239 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2240 ret = cma_alloc_any_port(ps, id_priv);
2242 ret = cma_use_port(ps, id_priv);
2243 mutex_unlock(&lock);
2248 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2249 struct sockaddr *addr)
2251 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2252 struct sockaddr_in6 *sin6;
2254 if (addr->sa_family != AF_INET6)
2257 sin6 = (struct sockaddr_in6 *) addr;
2258 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2259 !sin6->sin6_scope_id)
2262 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2267 int rdma_listen(struct rdma_cm_id *id, int backlog)
2269 struct rdma_id_private *id_priv;
2272 id_priv = container_of(id, struct rdma_id_private, id);
2273 if (id_priv->state == RDMA_CM_IDLE) {
2274 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2275 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2280 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2283 if (id_priv->reuseaddr) {
2284 ret = cma_bind_listen(id_priv);
2289 id_priv->backlog = backlog;
2291 switch (rdma_node_get_transport(id->device->node_type)) {
2292 case RDMA_TRANSPORT_IB:
2293 ret = cma_ib_listen(id_priv);
2297 case RDMA_TRANSPORT_IWARP:
2298 ret = cma_iw_listen(id_priv, backlog);
2307 cma_listen_on_all(id_priv);
2311 id_priv->backlog = 0;
2312 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2315 EXPORT_SYMBOL(rdma_listen);
2317 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2319 struct rdma_id_private *id_priv;
2322 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2323 return -EAFNOSUPPORT;
2325 id_priv = container_of(id, struct rdma_id_private, id);
2326 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2329 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2333 if (!cma_any_addr(addr)) {
2334 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2338 ret = cma_acquire_dev(id_priv);
2343 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2344 ret = cma_get_port(id_priv);
2350 if (id_priv->cma_dev)
2351 cma_release_dev(id_priv);
2353 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2356 EXPORT_SYMBOL(rdma_bind_addr);
2358 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2359 struct rdma_route *route)
2361 struct cma_hdr *cma_hdr;
2362 struct sdp_hh *sdp_hdr;
2364 if (route->addr.src_addr.ss_family == AF_INET) {
2365 struct sockaddr_in *src4, *dst4;
2367 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2368 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2373 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2375 sdp_set_ip_ver(sdp_hdr, 4);
2376 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2377 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2378 sdp_hdr->port = src4->sin_port;
2382 cma_hdr->cma_version = CMA_VERSION;
2383 cma_set_ip_ver(cma_hdr, 4);
2384 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2385 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2386 cma_hdr->port = src4->sin_port;
2390 struct sockaddr_in6 *src6, *dst6;
2392 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2393 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2398 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2400 sdp_set_ip_ver(sdp_hdr, 6);
2401 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2402 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2403 sdp_hdr->port = src6->sin6_port;
2407 cma_hdr->cma_version = CMA_VERSION;
2408 cma_set_ip_ver(cma_hdr, 6);
2409 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2410 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2411 cma_hdr->port = src6->sin6_port;
2418 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2419 struct ib_cm_event *ib_event)
2421 struct rdma_id_private *id_priv = cm_id->context;
2422 struct rdma_cm_event event;
2423 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2426 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2429 memset(&event, 0, sizeof event);
2430 switch (ib_event->event) {
2431 case IB_CM_SIDR_REQ_ERROR:
2432 event.event = RDMA_CM_EVENT_UNREACHABLE;
2433 event.status = -ETIMEDOUT;
2435 case IB_CM_SIDR_REP_RECEIVED:
2436 event.param.ud.private_data = ib_event->private_data;
2437 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2438 if (rep->status != IB_SIDR_SUCCESS) {
2439 event.event = RDMA_CM_EVENT_UNREACHABLE;
2440 event.status = ib_event->param.sidr_rep_rcvd.status;
2443 ret = cma_set_qkey(id_priv);
2445 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2446 event.status = -EINVAL;
2449 if (id_priv->qkey != rep->qkey) {
2450 event.event = RDMA_CM_EVENT_UNREACHABLE;
2451 event.status = -EINVAL;
2454 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2455 id_priv->id.route.path_rec,
2456 &event.param.ud.ah_attr);
2457 event.param.ud.qp_num = rep->qpn;
2458 event.param.ud.qkey = rep->qkey;
2459 event.event = RDMA_CM_EVENT_ESTABLISHED;
2463 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2468 ret = id_priv->id.event_handler(&id_priv->id, &event);
2470 /* Destroy the CM ID by returning a non-zero value. */
2471 id_priv->cm_id.ib = NULL;
2472 cma_exch(id_priv, RDMA_CM_DESTROYING);
2473 mutex_unlock(&id_priv->handler_mutex);
2474 rdma_destroy_id(&id_priv->id);
2478 mutex_unlock(&id_priv->handler_mutex);
2482 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2483 struct rdma_conn_param *conn_param)
2485 struct ib_cm_sidr_req_param req;
2486 struct rdma_route *route;
2489 req.private_data_len = sizeof(struct cma_hdr) +
2490 conn_param->private_data_len;
2491 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2492 if (!req.private_data)
2495 if (conn_param->private_data && conn_param->private_data_len)
2496 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2497 conn_param->private_data, conn_param->private_data_len);
2499 route = &id_priv->id.route;
2500 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2504 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2505 cma_sidr_rep_handler, id_priv);
2506 if (IS_ERR(id_priv->cm_id.ib)) {
2507 ret = PTR_ERR(id_priv->cm_id.ib);
2511 req.path = route->path_rec;
2512 req.service_id = cma_get_service_id(id_priv->id.ps,
2513 (struct sockaddr *) &route->addr.dst_addr);
2514 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2515 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2517 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2519 ib_destroy_cm_id(id_priv->cm_id.ib);
2520 id_priv->cm_id.ib = NULL;
2523 kfree(req.private_data);
2527 static int cma_connect_ib(struct rdma_id_private *id_priv,
2528 struct rdma_conn_param *conn_param)
2530 struct ib_cm_req_param req;
2531 struct rdma_route *route;
2535 memset(&req, 0, sizeof req);
2536 offset = cma_user_data_offset(id_priv->id.ps);
2537 req.private_data_len = offset + conn_param->private_data_len;
2538 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2542 if (conn_param->private_data && conn_param->private_data_len)
2543 memcpy(private_data + offset, conn_param->private_data,
2544 conn_param->private_data_len);
2546 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2548 if (IS_ERR(id_priv->cm_id.ib)) {
2549 ret = PTR_ERR(id_priv->cm_id.ib);
2553 route = &id_priv->id.route;
2554 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2557 req.private_data = private_data;
2559 req.primary_path = &route->path_rec[0];
2560 if (route->num_paths == 2)
2561 req.alternate_path = &route->path_rec[1];
2563 req.service_id = cma_get_service_id(id_priv->id.ps,
2564 (struct sockaddr *) &route->addr.dst_addr);
2565 req.qp_num = id_priv->qp_num;
2566 req.qp_type = IB_QPT_RC;
2567 req.starting_psn = id_priv->seq_num;
2568 req.responder_resources = conn_param->responder_resources;
2569 req.initiator_depth = conn_param->initiator_depth;
2570 req.flow_control = conn_param->flow_control;
2571 req.retry_count = conn_param->retry_count;
2572 req.rnr_retry_count = conn_param->rnr_retry_count;
2573 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2574 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2575 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2576 req.srq = id_priv->srq ? 1 : 0;
2578 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2580 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2581 ib_destroy_cm_id(id_priv->cm_id.ib);
2582 id_priv->cm_id.ib = NULL;
2585 kfree(private_data);
2589 static int cma_connect_iw(struct rdma_id_private *id_priv,
2590 struct rdma_conn_param *conn_param)
2592 struct iw_cm_id *cm_id;
2593 struct sockaddr_in* sin;
2595 struct iw_cm_conn_param iw_param;
2597 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2598 if (IS_ERR(cm_id)) {
2599 ret = PTR_ERR(cm_id);
2603 id_priv->cm_id.iw = cm_id;
2605 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2606 cm_id->local_addr = *sin;
2608 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2609 cm_id->remote_addr = *sin;
2611 ret = cma_modify_qp_rtr(id_priv, conn_param);
2615 iw_param.ord = conn_param->initiator_depth;
2616 iw_param.ird = conn_param->responder_resources;
2617 iw_param.private_data = conn_param->private_data;
2618 iw_param.private_data_len = conn_param->private_data_len;
2620 iw_param.qpn = id_priv->qp_num;
2622 iw_param.qpn = conn_param->qp_num;
2623 ret = iw_cm_connect(cm_id, &iw_param);
2625 if (ret && !IS_ERR(cm_id)) {
2626 iw_destroy_cm_id(cm_id);
2627 id_priv->cm_id.iw = NULL;
2632 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2634 struct rdma_id_private *id_priv;
2637 id_priv = container_of(id, struct rdma_id_private, id);
2638 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2642 id_priv->qp_num = conn_param->qp_num;
2643 id_priv->srq = conn_param->srq;
2646 switch (rdma_node_get_transport(id->device->node_type)) {
2647 case RDMA_TRANSPORT_IB:
2648 if (cma_is_ud_ps(id->ps))
2649 ret = cma_resolve_ib_udp(id_priv, conn_param);
2651 ret = cma_connect_ib(id_priv, conn_param);
2653 case RDMA_TRANSPORT_IWARP:
2654 ret = cma_connect_iw(id_priv, conn_param);
2665 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2668 EXPORT_SYMBOL(rdma_connect);
2670 static int cma_accept_ib(struct rdma_id_private *id_priv,
2671 struct rdma_conn_param *conn_param)
2673 struct ib_cm_rep_param rep;
2676 ret = cma_modify_qp_rtr(id_priv, conn_param);
2680 ret = cma_modify_qp_rts(id_priv, conn_param);
2684 memset(&rep, 0, sizeof rep);
2685 rep.qp_num = id_priv->qp_num;
2686 rep.starting_psn = id_priv->seq_num;
2687 rep.private_data = conn_param->private_data;
2688 rep.private_data_len = conn_param->private_data_len;
2689 rep.responder_resources = conn_param->responder_resources;
2690 rep.initiator_depth = conn_param->initiator_depth;
2691 rep.failover_accepted = 0;
2692 rep.flow_control = conn_param->flow_control;
2693 rep.rnr_retry_count = conn_param->rnr_retry_count;
2694 rep.srq = id_priv->srq ? 1 : 0;
2696 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2701 static int cma_accept_iw(struct rdma_id_private *id_priv,
2702 struct rdma_conn_param *conn_param)
2704 struct iw_cm_conn_param iw_param;
2707 ret = cma_modify_qp_rtr(id_priv, conn_param);
2711 iw_param.ord = conn_param->initiator_depth;
2712 iw_param.ird = conn_param->responder_resources;
2713 iw_param.private_data = conn_param->private_data;
2714 iw_param.private_data_len = conn_param->private_data_len;
2715 if (id_priv->id.qp) {
2716 iw_param.qpn = id_priv->qp_num;
2718 iw_param.qpn = conn_param->qp_num;
2720 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2723 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2724 enum ib_cm_sidr_status status,
2725 const void *private_data, int private_data_len)
2727 struct ib_cm_sidr_rep_param rep;
2730 memset(&rep, 0, sizeof rep);
2731 rep.status = status;
2732 if (status == IB_SIDR_SUCCESS) {
2733 ret = cma_set_qkey(id_priv);
2736 rep.qp_num = id_priv->qp_num;
2737 rep.qkey = id_priv->qkey;
2739 rep.private_data = private_data;
2740 rep.private_data_len = private_data_len;
2742 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2745 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2747 struct rdma_id_private *id_priv;
2750 id_priv = container_of(id, struct rdma_id_private, id);
2751 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2754 if (!id->qp && conn_param) {
2755 id_priv->qp_num = conn_param->qp_num;
2756 id_priv->srq = conn_param->srq;
2759 switch (rdma_node_get_transport(id->device->node_type)) {
2760 case RDMA_TRANSPORT_IB:
2761 if (cma_is_ud_ps(id->ps))
2762 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2763 conn_param->private_data,
2764 conn_param->private_data_len);
2765 else if (conn_param)
2766 ret = cma_accept_ib(id_priv, conn_param);
2768 ret = cma_rep_recv(id_priv);
2770 case RDMA_TRANSPORT_IWARP:
2771 ret = cma_accept_iw(id_priv, conn_param);
2783 cma_modify_qp_err(id_priv);
2784 rdma_reject(id, NULL, 0);
2787 EXPORT_SYMBOL(rdma_accept);
2789 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2791 struct rdma_id_private *id_priv;
2794 id_priv = container_of(id, struct rdma_id_private, id);
2795 if (!cma_has_cm_dev(id_priv))
2798 switch (id->device->node_type) {
2799 case RDMA_NODE_IB_CA:
2800 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2808 EXPORT_SYMBOL(rdma_notify);
2810 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2811 u8 private_data_len)
2813 struct rdma_id_private *id_priv;
2816 id_priv = container_of(id, struct rdma_id_private, id);
2817 if (!cma_has_cm_dev(id_priv))
2820 switch (rdma_node_get_transport(id->device->node_type)) {
2821 case RDMA_TRANSPORT_IB:
2822 if (cma_is_ud_ps(id->ps))
2823 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2824 private_data, private_data_len);
2826 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2827 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2828 0, private_data, private_data_len);
2830 case RDMA_TRANSPORT_IWARP:
2831 ret = iw_cm_reject(id_priv->cm_id.iw,
2832 private_data, private_data_len);
2840 EXPORT_SYMBOL(rdma_reject);
2842 int rdma_disconnect(struct rdma_cm_id *id)
2844 struct rdma_id_private *id_priv;
2847 id_priv = container_of(id, struct rdma_id_private, id);
2848 if (!cma_has_cm_dev(id_priv))
2851 switch (rdma_node_get_transport(id->device->node_type)) {
2852 case RDMA_TRANSPORT_IB:
2853 ret = cma_modify_qp_err(id_priv);
2856 /* Initiate or respond to a disconnect. */
2857 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2858 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2860 case RDMA_TRANSPORT_IWARP:
2861 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2870 EXPORT_SYMBOL(rdma_disconnect);
2872 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2874 struct rdma_id_private *id_priv;
2875 struct cma_multicast *mc = multicast->context;
2876 struct rdma_cm_event event;
2879 id_priv = mc->id_priv;
2880 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
2881 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
2884 mutex_lock(&id_priv->qp_mutex);
2885 if (!status && id_priv->id.qp)
2886 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2887 multicast->rec.mlid);
2888 mutex_unlock(&id_priv->qp_mutex);
2890 memset(&event, 0, sizeof event);
2891 event.status = status;
2892 event.param.ud.private_data = mc->context;
2894 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2895 ib_init_ah_from_mcmember(id_priv->id.device,
2896 id_priv->id.port_num, &multicast->rec,
2897 &event.param.ud.ah_attr);
2898 event.param.ud.qp_num = 0xFFFFFF;
2899 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2901 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2903 ret = id_priv->id.event_handler(&id_priv->id, &event);
2905 cma_exch(id_priv, RDMA_CM_DESTROYING);
2906 mutex_unlock(&id_priv->handler_mutex);
2907 rdma_destroy_id(&id_priv->id);
2911 mutex_unlock(&id_priv->handler_mutex);
2915 static void cma_set_mgid(struct rdma_id_private *id_priv,
2916 struct sockaddr *addr, union ib_gid *mgid)
2918 unsigned char mc_map[MAX_ADDR_LEN];
2919 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2920 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2921 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2923 if (cma_any_addr(addr)) {
2924 memset(mgid, 0, sizeof *mgid);
2925 } else if ((addr->sa_family == AF_INET6) &&
2926 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
2928 /* IPv6 address is an SA assigned MGID. */
2929 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2930 } else if ((addr->sa_family == AF_INET6)) {
2931 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2932 if (id_priv->id.ps == RDMA_PS_UDP)
2933 mc_map[7] = 0x01; /* Use RDMA CM signature */
2934 *mgid = *(union ib_gid *) (mc_map + 4);
2936 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
2937 if (id_priv->id.ps == RDMA_PS_UDP)
2938 mc_map[7] = 0x01; /* Use RDMA CM signature */
2939 *mgid = *(union ib_gid *) (mc_map + 4);
2943 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2944 struct cma_multicast *mc)
2946 struct ib_sa_mcmember_rec rec;
2947 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2948 ib_sa_comp_mask comp_mask;
2951 ib_addr_get_mgid(dev_addr, &rec.mgid);
2952 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2957 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
2958 if (id_priv->id.ps == RDMA_PS_UDP)
2959 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2960 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
2961 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2964 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2965 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2966 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2967 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2968 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2970 if (id_priv->id.ps == RDMA_PS_IPOIB)
2971 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2972 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2974 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2975 id_priv->id.port_num, &rec,
2976 comp_mask, GFP_KERNEL,
2977 cma_ib_mc_handler, mc);
2978 if (IS_ERR(mc->multicast.ib))
2979 return PTR_ERR(mc->multicast.ib);
2984 static void iboe_mcast_work_handler(struct work_struct *work)
2986 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
2987 struct cma_multicast *mc = mw->mc;
2988 struct ib_sa_multicast *m = mc->multicast.ib;
2990 mc->multicast.ib->context = mc;
2991 cma_ib_mc_handler(0, m);
2992 kref_put(&mc->mcref, release_mc);
2996 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
2998 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
2999 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3001 if (cma_any_addr(addr)) {
3002 memset(mgid, 0, sizeof *mgid);
3003 } else if (addr->sa_family == AF_INET6) {
3004 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3006 mgid->raw[0] = 0xff;
3007 mgid->raw[1] = 0x0e;
3016 mgid->raw[10] = 0xff;
3017 mgid->raw[11] = 0xff;
3018 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3022 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3023 struct cma_multicast *mc)
3025 struct iboe_mcast_work *work;
3026 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3028 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3029 struct net_device *ndev = NULL;
3031 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3034 work = kzalloc(sizeof *work, GFP_KERNEL);
3038 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3039 if (!mc->multicast.ib) {
3044 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3046 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3047 if (id_priv->id.ps == RDMA_PS_UDP)
3048 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3050 if (dev_addr->bound_dev_if)
3051 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3056 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3057 mc->multicast.ib->rec.hop_limit = 1;
3058 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3060 if (!mc->multicast.ib->rec.mtu) {
3064 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3067 INIT_WORK(&work->work, iboe_mcast_work_handler);
3068 kref_get(&mc->mcref);
3069 queue_work(cma_wq, &work->work);
3074 kfree(mc->multicast.ib);
3080 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3083 struct rdma_id_private *id_priv;
3084 struct cma_multicast *mc;
3087 id_priv = container_of(id, struct rdma_id_private, id);
3088 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3089 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3092 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3096 memcpy(&mc->addr, addr, ip_addr_size(addr));
3097 mc->context = context;
3098 mc->id_priv = id_priv;
3100 spin_lock(&id_priv->lock);
3101 list_add(&mc->list, &id_priv->mc_list);
3102 spin_unlock(&id_priv->lock);
3104 switch (rdma_node_get_transport(id->device->node_type)) {
3105 case RDMA_TRANSPORT_IB:
3106 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3107 case IB_LINK_LAYER_INFINIBAND:
3108 ret = cma_join_ib_multicast(id_priv, mc);
3110 case IB_LINK_LAYER_ETHERNET:
3111 kref_init(&mc->mcref);
3112 ret = cma_iboe_join_multicast(id_priv, mc);
3124 spin_lock_irq(&id_priv->lock);
3125 list_del(&mc->list);
3126 spin_unlock_irq(&id_priv->lock);
3131 EXPORT_SYMBOL(rdma_join_multicast);
3133 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3135 struct rdma_id_private *id_priv;
3136 struct cma_multicast *mc;
3138 id_priv = container_of(id, struct rdma_id_private, id);
3139 spin_lock_irq(&id_priv->lock);
3140 list_for_each_entry(mc, &id_priv->mc_list, list) {
3141 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3142 list_del(&mc->list);
3143 spin_unlock_irq(&id_priv->lock);
3146 ib_detach_mcast(id->qp,
3147 &mc->multicast.ib->rec.mgid,
3148 mc->multicast.ib->rec.mlid);
3149 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3150 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3151 case IB_LINK_LAYER_INFINIBAND:
3152 ib_sa_free_multicast(mc->multicast.ib);
3155 case IB_LINK_LAYER_ETHERNET:
3156 kref_put(&mc->mcref, release_mc);
3165 spin_unlock_irq(&id_priv->lock);
3167 EXPORT_SYMBOL(rdma_leave_multicast);
3169 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3171 struct rdma_dev_addr *dev_addr;
3172 struct cma_ndev_work *work;
3174 dev_addr = &id_priv->id.route.addr.dev_addr;
3176 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3177 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3178 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3179 ndev->name, &id_priv->id);
3180 work = kzalloc(sizeof *work, GFP_KERNEL);
3184 INIT_WORK(&work->work, cma_ndev_work_handler);
3186 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3187 atomic_inc(&id_priv->refcount);
3188 queue_work(cma_wq, &work->work);
3194 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3197 struct net_device *ndev = (struct net_device *)ctx;
3198 struct cma_device *cma_dev;
3199 struct rdma_id_private *id_priv;
3200 int ret = NOTIFY_DONE;
3202 if (dev_net(ndev) != &init_net)
3205 if (event != NETDEV_BONDING_FAILOVER)
3208 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3212 list_for_each_entry(cma_dev, &dev_list, list)
3213 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3214 ret = cma_netdev_change(ndev, id_priv);
3220 mutex_unlock(&lock);
3224 static struct notifier_block cma_nb = {
3225 .notifier_call = cma_netdev_callback
3228 static void cma_add_one(struct ib_device *device)
3230 struct cma_device *cma_dev;
3231 struct rdma_id_private *id_priv;
3233 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3237 cma_dev->device = device;
3239 init_completion(&cma_dev->comp);
3240 atomic_set(&cma_dev->refcount, 1);
3241 INIT_LIST_HEAD(&cma_dev->id_list);
3242 ib_set_client_data(device, &cma_client, cma_dev);
3245 list_add_tail(&cma_dev->list, &dev_list);
3246 list_for_each_entry(id_priv, &listen_any_list, list)
3247 cma_listen_on_dev(id_priv, cma_dev);
3248 mutex_unlock(&lock);
3251 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3253 struct rdma_cm_event event;
3254 enum rdma_cm_state state;
3257 /* Record that we want to remove the device */
3258 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3259 if (state == RDMA_CM_DESTROYING)
3262 cma_cancel_operation(id_priv, state);
3263 mutex_lock(&id_priv->handler_mutex);
3265 /* Check for destruction from another callback. */
3266 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3269 memset(&event, 0, sizeof event);
3270 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3271 ret = id_priv->id.event_handler(&id_priv->id, &event);
3273 mutex_unlock(&id_priv->handler_mutex);
3277 static void cma_process_remove(struct cma_device *cma_dev)
3279 struct rdma_id_private *id_priv;
3283 while (!list_empty(&cma_dev->id_list)) {
3284 id_priv = list_entry(cma_dev->id_list.next,
3285 struct rdma_id_private, list);
3287 list_del(&id_priv->listen_list);
3288 list_del_init(&id_priv->list);
3289 atomic_inc(&id_priv->refcount);
3290 mutex_unlock(&lock);
3292 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3293 cma_deref_id(id_priv);
3295 rdma_destroy_id(&id_priv->id);
3299 mutex_unlock(&lock);
3301 cma_deref_dev(cma_dev);
3302 wait_for_completion(&cma_dev->comp);
3305 static void cma_remove_one(struct ib_device *device)
3307 struct cma_device *cma_dev;
3309 cma_dev = ib_get_client_data(device, &cma_client);
3314 list_del(&cma_dev->list);
3315 mutex_unlock(&lock);
3317 cma_process_remove(cma_dev);
3321 static int __init cma_init(void)
3325 cma_wq = create_singlethread_workqueue("rdma_cm");
3329 ib_sa_register_client(&sa_client);
3330 rdma_addr_register_client(&addr_client);
3331 register_netdevice_notifier(&cma_nb);
3333 ret = ib_register_client(&cma_client);
3339 unregister_netdevice_notifier(&cma_nb);
3340 rdma_addr_unregister_client(&addr_client);
3341 ib_sa_unregister_client(&sa_client);
3342 destroy_workqueue(cma_wq);
3346 static void __exit cma_cleanup(void)
3348 ib_unregister_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);
3353 idr_destroy(&sdp_ps);
3354 idr_destroy(&tcp_ps);
3355 idr_destroy(&udp_ps);
3356 idr_destroy(&ipoib_ps);
3359 module_init(cma_init);
3360 module_exit(cma_cleanup);