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/rdma_netlink.h>
51 #include <rdma/ib_cache.h>
52 #include <rdma/ib_cm.h>
53 #include <rdma/ib_sa.h>
54 #include <rdma/iw_cm.h>
56 MODULE_AUTHOR("Sean Hefty");
57 MODULE_DESCRIPTION("Generic RDMA CM Agent");
58 MODULE_LICENSE("Dual BSD/GPL");
60 #define CMA_CM_RESPONSE_TIMEOUT 20
61 #define CMA_MAX_CM_RETRIES 15
62 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
63 #define CMA_IBOE_PACKET_LIFETIME 18
65 static void cma_add_one(struct ib_device *device);
66 static void cma_remove_one(struct ib_device *device);
68 static struct ib_client cma_client = {
71 .remove = cma_remove_one
74 static struct ib_sa_client sa_client;
75 static struct rdma_addr_client addr_client;
76 static LIST_HEAD(dev_list);
77 static LIST_HEAD(listen_any_list);
78 static DEFINE_MUTEX(lock);
79 static struct workqueue_struct *cma_wq;
80 static DEFINE_IDR(sdp_ps);
81 static DEFINE_IDR(tcp_ps);
82 static DEFINE_IDR(udp_ps);
83 static DEFINE_IDR(ipoib_ps);
84 static DEFINE_IDR(ib_ps);
87 struct list_head list;
88 struct ib_device *device;
89 struct completion comp;
91 struct list_head id_list;
94 struct rdma_bind_list {
96 struct hlist_head owners;
101 * Device removal can occur at anytime, so we need extra handling to
102 * serialize notifying the user of device removal with other callbacks.
103 * We do this by disabling removal notification while a callback is in process,
104 * and reporting it after the callback completes.
106 struct rdma_id_private {
107 struct rdma_cm_id id;
109 struct rdma_bind_list *bind_list;
110 struct hlist_node node;
111 struct list_head list; /* listen_any_list or cma_device.list */
112 struct list_head listen_list; /* per device listens */
113 struct cma_device *cma_dev;
114 struct list_head mc_list;
117 enum rdma_cm_state state;
119 struct mutex qp_mutex;
121 struct completion comp;
123 struct mutex handler_mutex;
127 struct ib_sa_query *query;
143 struct cma_multicast {
144 struct rdma_id_private *id_priv;
146 struct ib_sa_multicast *ib;
148 struct list_head list;
150 struct sockaddr_storage addr;
155 struct work_struct work;
156 struct rdma_id_private *id;
157 enum rdma_cm_state old_state;
158 enum rdma_cm_state new_state;
159 struct rdma_cm_event event;
162 struct cma_ndev_work {
163 struct work_struct work;
164 struct rdma_id_private *id;
165 struct rdma_cm_event event;
168 struct iboe_mcast_work {
169 struct work_struct work;
170 struct rdma_id_private *id;
171 struct cma_multicast *mc;
184 u8 ip_version; /* IP version: 7:4 */
186 union cma_ip_addr src_addr;
187 union cma_ip_addr dst_addr;
192 u8 sdp_version; /* Major version: 7:4 */
193 u8 ip_version; /* IP version: 7:4 */
194 u8 sdp_specific1[10];
196 __be16 sdp_specific2;
197 union cma_ip_addr src_addr;
198 union cma_ip_addr dst_addr;
206 #define CMA_VERSION 0x00
207 #define SDP_MAJ_VERSION 0x2
209 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
214 spin_lock_irqsave(&id_priv->lock, flags);
215 ret = (id_priv->state == comp);
216 spin_unlock_irqrestore(&id_priv->lock, flags);
220 static int cma_comp_exch(struct rdma_id_private *id_priv,
221 enum rdma_cm_state comp, enum rdma_cm_state exch)
226 spin_lock_irqsave(&id_priv->lock, flags);
227 if ((ret = (id_priv->state == comp)))
228 id_priv->state = exch;
229 spin_unlock_irqrestore(&id_priv->lock, flags);
233 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
234 enum rdma_cm_state exch)
237 enum rdma_cm_state old;
239 spin_lock_irqsave(&id_priv->lock, flags);
240 old = id_priv->state;
241 id_priv->state = exch;
242 spin_unlock_irqrestore(&id_priv->lock, flags);
246 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
248 return hdr->ip_version >> 4;
251 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
253 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
256 static inline u8 sdp_get_majv(u8 sdp_version)
258 return sdp_version >> 4;
261 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
263 return hh->ip_version >> 4;
266 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
268 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
271 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
272 struct cma_device *cma_dev)
274 atomic_inc(&cma_dev->refcount);
275 id_priv->cma_dev = cma_dev;
276 id_priv->id.device = cma_dev->device;
277 id_priv->id.route.addr.dev_addr.transport =
278 rdma_node_get_transport(cma_dev->device->node_type);
279 list_add_tail(&id_priv->list, &cma_dev->id_list);
282 static inline void cma_deref_dev(struct cma_device *cma_dev)
284 if (atomic_dec_and_test(&cma_dev->refcount))
285 complete(&cma_dev->comp);
288 static inline void release_mc(struct kref *kref)
290 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
292 kfree(mc->multicast.ib);
296 static void cma_release_dev(struct rdma_id_private *id_priv)
299 list_del(&id_priv->list);
300 cma_deref_dev(id_priv->cma_dev);
301 id_priv->cma_dev = NULL;
305 static int cma_set_qkey(struct rdma_id_private *id_priv)
307 struct ib_sa_mcmember_rec rec;
313 switch (id_priv->id.ps) {
315 id_priv->qkey = RDMA_UDP_QKEY;
318 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
319 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
320 id_priv->id.port_num, &rec.mgid,
323 id_priv->qkey = be32_to_cpu(rec.qkey);
331 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
335 struct ib_port_attr props;
338 err = ib_query_port(device, port_num, &props);
342 for (i = 0; i < props.gid_tbl_len; ++i) {
343 err = ib_query_gid(device, port_num, i, &tmp);
346 if (!memcmp(&tmp, gid, sizeof tmp))
353 static int cma_acquire_dev(struct rdma_id_private *id_priv)
355 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
356 struct cma_device *cma_dev;
357 union ib_gid gid, iboe_gid;
360 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
361 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
363 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
364 id_priv->id.ps == RDMA_PS_IPOIB)
368 iboe_addr_get_sgid(dev_addr, &iboe_gid);
369 memcpy(&gid, dev_addr->src_dev_addr +
370 rdma_addr_gid_offset(dev_addr), sizeof gid);
371 list_for_each_entry(cma_dev, &dev_list, list) {
372 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
373 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
374 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
375 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
376 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
378 ret = find_gid_port(cma_dev->device, &gid, port);
381 id_priv->id.port_num = port;
391 cma_attach_to_dev(id_priv, cma_dev);
397 static void cma_deref_id(struct rdma_id_private *id_priv)
399 if (atomic_dec_and_test(&id_priv->refcount))
400 complete(&id_priv->comp);
403 static int cma_disable_callback(struct rdma_id_private *id_priv,
404 enum rdma_cm_state state)
406 mutex_lock(&id_priv->handler_mutex);
407 if (id_priv->state != state) {
408 mutex_unlock(&id_priv->handler_mutex);
414 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
415 void *context, enum rdma_port_space ps,
416 enum ib_qp_type qp_type)
418 struct rdma_id_private *id_priv;
420 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
422 return ERR_PTR(-ENOMEM);
424 id_priv->owner = task_pid_nr(current);
425 id_priv->state = RDMA_CM_IDLE;
426 id_priv->id.context = context;
427 id_priv->id.event_handler = event_handler;
429 id_priv->id.qp_type = qp_type;
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 (id->qp_type == IB_QPT_UD)
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 (id_priv->id.qp_type == IB_QPT_UD) {
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 || (id_priv->id.qp_type == IB_QPT_UD))
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)
924 ib_destroy_cm_id(id_priv->cm_id.ib);
926 case RDMA_TRANSPORT_IWARP:
927 if (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,
1091 listen_id->ps, ib_event->param.req_rcvd.qp_type);
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);
1130 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1131 struct ib_cm_event *ib_event)
1133 struct rdma_id_private *id_priv;
1134 struct rdma_cm_id *id;
1135 union cma_ip_addr *src, *dst;
1140 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1141 listen_id->ps, IB_QPT_UD);
1146 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1147 &ip_ver, &port, &src, &dst))
1150 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1151 ip_ver, port, src, dst);
1153 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1154 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1155 &id->route.addr.dev_addr);
1160 id_priv = container_of(id, struct rdma_id_private, id);
1161 id_priv->state = RDMA_CM_CONNECT;
1164 rdma_destroy_id(id);
1168 static void cma_set_req_event_data(struct rdma_cm_event *event,
1169 struct ib_cm_req_event_param *req_data,
1170 void *private_data, int offset)
1172 event->param.conn.private_data = private_data + offset;
1173 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1174 event->param.conn.responder_resources = req_data->responder_resources;
1175 event->param.conn.initiator_depth = req_data->initiator_depth;
1176 event->param.conn.flow_control = req_data->flow_control;
1177 event->param.conn.retry_count = req_data->retry_count;
1178 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1179 event->param.conn.srq = req_data->srq;
1180 event->param.conn.qp_num = req_data->remote_qpn;
1183 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1185 return (((ib_event->event == IB_CM_REQ_RECEIVED) ||
1186 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1187 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1188 (id->qp_type == IB_QPT_UD)) ||
1192 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1194 struct rdma_id_private *listen_id, *conn_id;
1195 struct rdma_cm_event event;
1198 listen_id = cm_id->context;
1199 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1202 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1203 return -ECONNABORTED;
1205 memset(&event, 0, sizeof event);
1206 offset = cma_user_data_offset(listen_id->id.ps);
1207 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1208 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1209 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1210 event.param.ud.private_data = ib_event->private_data + offset;
1211 event.param.ud.private_data_len =
1212 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1214 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1215 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1216 ib_event->private_data, offset);
1223 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1224 ret = cma_acquire_dev(conn_id);
1226 goto release_conn_id;
1228 conn_id->cm_id.ib = cm_id;
1229 cm_id->context = conn_id;
1230 cm_id->cm_handler = cma_ib_handler;
1233 * Protect against the user destroying conn_id from another thread
1234 * until we're done accessing it.
1236 atomic_inc(&conn_id->refcount);
1237 ret = conn_id->id.event_handler(&conn_id->id, &event);
1240 * Acquire mutex to prevent user executing rdma_destroy_id()
1241 * while we're accessing the cm_id.
1244 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1245 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1246 mutex_unlock(&lock);
1247 mutex_unlock(&conn_id->handler_mutex);
1248 cma_deref_id(conn_id);
1251 cma_deref_id(conn_id);
1253 /* Destroy the CM ID by returning a non-zero value. */
1254 conn_id->cm_id.ib = NULL;
1257 cma_exch(conn_id, RDMA_CM_DESTROYING);
1258 mutex_unlock(&conn_id->handler_mutex);
1259 rdma_destroy_id(&conn_id->id);
1262 mutex_unlock(&listen_id->handler_mutex);
1266 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1268 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1271 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1272 struct ib_cm_compare_data *compare)
1274 struct cma_hdr *cma_data, *cma_mask;
1275 struct sdp_hh *sdp_data, *sdp_mask;
1277 struct in6_addr ip6_addr;
1279 memset(compare, 0, sizeof *compare);
1280 cma_data = (void *) compare->data;
1281 cma_mask = (void *) compare->mask;
1282 sdp_data = (void *) compare->data;
1283 sdp_mask = (void *) compare->mask;
1285 switch (addr->sa_family) {
1287 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1288 if (ps == RDMA_PS_SDP) {
1289 sdp_set_ip_ver(sdp_data, 4);
1290 sdp_set_ip_ver(sdp_mask, 0xF);
1291 sdp_data->dst_addr.ip4.addr = ip4_addr;
1292 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1294 cma_set_ip_ver(cma_data, 4);
1295 cma_set_ip_ver(cma_mask, 0xF);
1296 cma_data->dst_addr.ip4.addr = ip4_addr;
1297 cma_mask->dst_addr.ip4.addr = htonl(~0);
1301 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1302 if (ps == RDMA_PS_SDP) {
1303 sdp_set_ip_ver(sdp_data, 6);
1304 sdp_set_ip_ver(sdp_mask, 0xF);
1305 sdp_data->dst_addr.ip6 = ip6_addr;
1306 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1307 sizeof sdp_mask->dst_addr.ip6);
1309 cma_set_ip_ver(cma_data, 6);
1310 cma_set_ip_ver(cma_mask, 0xF);
1311 cma_data->dst_addr.ip6 = ip6_addr;
1312 memset(&cma_mask->dst_addr.ip6, 0xFF,
1313 sizeof cma_mask->dst_addr.ip6);
1321 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1323 struct rdma_id_private *id_priv = iw_id->context;
1324 struct rdma_cm_event event;
1325 struct sockaddr_in *sin;
1328 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1331 memset(&event, 0, sizeof event);
1332 switch (iw_event->event) {
1333 case IW_CM_EVENT_CLOSE:
1334 event.event = RDMA_CM_EVENT_DISCONNECTED;
1336 case IW_CM_EVENT_CONNECT_REPLY:
1337 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1338 *sin = iw_event->local_addr;
1339 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1340 *sin = iw_event->remote_addr;
1341 switch (iw_event->status) {
1343 event.event = RDMA_CM_EVENT_ESTABLISHED;
1344 event.param.conn.initiator_depth = iw_event->ird;
1345 event.param.conn.responder_resources = iw_event->ord;
1349 event.event = RDMA_CM_EVENT_REJECTED;
1352 event.event = RDMA_CM_EVENT_UNREACHABLE;
1355 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1359 case IW_CM_EVENT_ESTABLISHED:
1360 event.event = RDMA_CM_EVENT_ESTABLISHED;
1361 event.param.conn.initiator_depth = iw_event->ird;
1362 event.param.conn.responder_resources = iw_event->ord;
1368 event.status = iw_event->status;
1369 event.param.conn.private_data = iw_event->private_data;
1370 event.param.conn.private_data_len = iw_event->private_data_len;
1371 ret = id_priv->id.event_handler(&id_priv->id, &event);
1373 /* Destroy the CM ID by returning a non-zero value. */
1374 id_priv->cm_id.iw = NULL;
1375 cma_exch(id_priv, RDMA_CM_DESTROYING);
1376 mutex_unlock(&id_priv->handler_mutex);
1377 rdma_destroy_id(&id_priv->id);
1381 mutex_unlock(&id_priv->handler_mutex);
1385 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1386 struct iw_cm_event *iw_event)
1388 struct rdma_cm_id *new_cm_id;
1389 struct rdma_id_private *listen_id, *conn_id;
1390 struct sockaddr_in *sin;
1391 struct net_device *dev = NULL;
1392 struct rdma_cm_event event;
1394 struct ib_device_attr attr;
1396 listen_id = cm_id->context;
1397 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1398 return -ECONNABORTED;
1400 /* Create a new RDMA id for the new IW CM ID */
1401 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1402 listen_id->id.context,
1403 RDMA_PS_TCP, IB_QPT_RC);
1404 if (IS_ERR(new_cm_id)) {
1408 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1409 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1410 conn_id->state = RDMA_CM_CONNECT;
1412 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1414 ret = -EADDRNOTAVAIL;
1415 mutex_unlock(&conn_id->handler_mutex);
1416 rdma_destroy_id(new_cm_id);
1419 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1421 mutex_unlock(&conn_id->handler_mutex);
1422 rdma_destroy_id(new_cm_id);
1426 ret = cma_acquire_dev(conn_id);
1428 mutex_unlock(&conn_id->handler_mutex);
1429 rdma_destroy_id(new_cm_id);
1433 conn_id->cm_id.iw = cm_id;
1434 cm_id->context = conn_id;
1435 cm_id->cm_handler = cma_iw_handler;
1437 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1438 *sin = iw_event->local_addr;
1439 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1440 *sin = iw_event->remote_addr;
1442 ret = ib_query_device(conn_id->id.device, &attr);
1444 mutex_unlock(&conn_id->handler_mutex);
1445 rdma_destroy_id(new_cm_id);
1449 memset(&event, 0, sizeof event);
1450 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1451 event.param.conn.private_data = iw_event->private_data;
1452 event.param.conn.private_data_len = iw_event->private_data_len;
1453 event.param.conn.initiator_depth = iw_event->ird;
1454 event.param.conn.responder_resources = iw_event->ord;
1457 * Protect against the user destroying conn_id from another thread
1458 * until we're done accessing it.
1460 atomic_inc(&conn_id->refcount);
1461 ret = conn_id->id.event_handler(&conn_id->id, &event);
1463 /* User wants to destroy the CM ID */
1464 conn_id->cm_id.iw = NULL;
1465 cma_exch(conn_id, RDMA_CM_DESTROYING);
1466 mutex_unlock(&conn_id->handler_mutex);
1467 cma_deref_id(conn_id);
1468 rdma_destroy_id(&conn_id->id);
1472 mutex_unlock(&conn_id->handler_mutex);
1473 cma_deref_id(conn_id);
1478 mutex_unlock(&listen_id->handler_mutex);
1482 static int cma_ib_listen(struct rdma_id_private *id_priv)
1484 struct ib_cm_compare_data compare_data;
1485 struct sockaddr *addr;
1486 struct ib_cm_id *id;
1490 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1494 id_priv->cm_id.ib = id;
1496 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1497 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1498 if (cma_any_addr(addr))
1499 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1501 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1502 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1506 ib_destroy_cm_id(id_priv->cm_id.ib);
1507 id_priv->cm_id.ib = NULL;
1513 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1516 struct sockaddr_in *sin;
1517 struct iw_cm_id *id;
1519 id = iw_create_cm_id(id_priv->id.device,
1520 iw_conn_req_handler,
1525 id_priv->cm_id.iw = id;
1527 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1528 id_priv->cm_id.iw->local_addr = *sin;
1530 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1533 iw_destroy_cm_id(id_priv->cm_id.iw);
1534 id_priv->cm_id.iw = NULL;
1540 static int cma_listen_handler(struct rdma_cm_id *id,
1541 struct rdma_cm_event *event)
1543 struct rdma_id_private *id_priv = id->context;
1545 id->context = id_priv->id.context;
1546 id->event_handler = id_priv->id.event_handler;
1547 return id_priv->id.event_handler(id, event);
1550 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1551 struct cma_device *cma_dev)
1553 struct rdma_id_private *dev_id_priv;
1554 struct rdma_cm_id *id;
1557 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1558 id_priv->id.qp_type);
1562 dev_id_priv = container_of(id, struct rdma_id_private, id);
1564 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1565 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1566 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1568 cma_attach_to_dev(dev_id_priv, cma_dev);
1569 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1570 atomic_inc(&id_priv->refcount);
1571 dev_id_priv->internal_id = 1;
1573 ret = rdma_listen(id, id_priv->backlog);
1575 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1576 "listening on device %s\n", ret, cma_dev->device->name);
1579 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1581 struct cma_device *cma_dev;
1584 list_add_tail(&id_priv->list, &listen_any_list);
1585 list_for_each_entry(cma_dev, &dev_list, list)
1586 cma_listen_on_dev(id_priv, cma_dev);
1587 mutex_unlock(&lock);
1590 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1592 struct rdma_id_private *id_priv;
1594 id_priv = container_of(id, struct rdma_id_private, id);
1595 id_priv->tos = (u8) tos;
1597 EXPORT_SYMBOL(rdma_set_service_type);
1599 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1602 struct cma_work *work = context;
1603 struct rdma_route *route;
1605 route = &work->id->id.route;
1608 route->num_paths = 1;
1609 *route->path_rec = *path_rec;
1611 work->old_state = RDMA_CM_ROUTE_QUERY;
1612 work->new_state = RDMA_CM_ADDR_RESOLVED;
1613 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1614 work->event.status = status;
1617 queue_work(cma_wq, &work->work);
1620 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1621 struct cma_work *work)
1623 struct rdma_addr *addr = &id_priv->id.route.addr;
1624 struct ib_sa_path_rec path_rec;
1625 ib_sa_comp_mask comp_mask;
1626 struct sockaddr_in6 *sin6;
1628 memset(&path_rec, 0, sizeof path_rec);
1629 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1630 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1631 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1632 path_rec.numb_path = 1;
1633 path_rec.reversible = 1;
1634 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1635 (struct sockaddr *) &addr->dst_addr);
1637 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1638 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1639 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1641 if (addr->src_addr.ss_family == AF_INET) {
1642 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1643 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1645 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1646 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1647 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1650 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1651 id_priv->id.port_num, &path_rec,
1652 comp_mask, timeout_ms,
1653 GFP_KERNEL, cma_query_handler,
1654 work, &id_priv->query);
1656 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1659 static void cma_work_handler(struct work_struct *_work)
1661 struct cma_work *work = container_of(_work, struct cma_work, work);
1662 struct rdma_id_private *id_priv = work->id;
1665 mutex_lock(&id_priv->handler_mutex);
1666 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1669 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1670 cma_exch(id_priv, RDMA_CM_DESTROYING);
1674 mutex_unlock(&id_priv->handler_mutex);
1675 cma_deref_id(id_priv);
1677 rdma_destroy_id(&id_priv->id);
1681 static void cma_ndev_work_handler(struct work_struct *_work)
1683 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1684 struct rdma_id_private *id_priv = work->id;
1687 mutex_lock(&id_priv->handler_mutex);
1688 if (id_priv->state == RDMA_CM_DESTROYING ||
1689 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1692 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1693 cma_exch(id_priv, RDMA_CM_DESTROYING);
1698 mutex_unlock(&id_priv->handler_mutex);
1699 cma_deref_id(id_priv);
1701 rdma_destroy_id(&id_priv->id);
1705 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1707 struct rdma_route *route = &id_priv->id.route;
1708 struct cma_work *work;
1711 work = kzalloc(sizeof *work, GFP_KERNEL);
1716 INIT_WORK(&work->work, cma_work_handler);
1717 work->old_state = RDMA_CM_ROUTE_QUERY;
1718 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1719 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1721 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1722 if (!route->path_rec) {
1727 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1733 kfree(route->path_rec);
1734 route->path_rec = NULL;
1740 int rdma_set_ib_paths(struct rdma_cm_id *id,
1741 struct ib_sa_path_rec *path_rec, int num_paths)
1743 struct rdma_id_private *id_priv;
1746 id_priv = container_of(id, struct rdma_id_private, id);
1747 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1748 RDMA_CM_ROUTE_RESOLVED))
1751 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1753 if (!id->route.path_rec) {
1758 id->route.num_paths = num_paths;
1761 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1764 EXPORT_SYMBOL(rdma_set_ib_paths);
1766 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1768 struct cma_work *work;
1770 work = kzalloc(sizeof *work, GFP_KERNEL);
1775 INIT_WORK(&work->work, cma_work_handler);
1776 work->old_state = RDMA_CM_ROUTE_QUERY;
1777 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1778 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1779 queue_work(cma_wq, &work->work);
1783 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1785 struct rdma_route *route = &id_priv->id.route;
1786 struct rdma_addr *addr = &route->addr;
1787 struct cma_work *work;
1789 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1790 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1791 struct net_device *ndev = NULL;
1794 if (src_addr->sin_family != dst_addr->sin_family)
1797 work = kzalloc(sizeof *work, GFP_KERNEL);
1802 INIT_WORK(&work->work, cma_work_handler);
1804 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1805 if (!route->path_rec) {
1810 route->num_paths = 1;
1812 if (addr->dev_addr.bound_dev_if)
1813 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1819 vid = rdma_vlan_dev_vlan_id(ndev);
1821 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1822 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1824 route->path_rec->hop_limit = 1;
1825 route->path_rec->reversible = 1;
1826 route->path_rec->pkey = cpu_to_be16(0xffff);
1827 route->path_rec->mtu_selector = IB_SA_EQ;
1828 route->path_rec->sl = id_priv->tos >> 5;
1830 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1831 route->path_rec->rate_selector = IB_SA_EQ;
1832 route->path_rec->rate = iboe_get_rate(ndev);
1834 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1835 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1836 if (!route->path_rec->mtu) {
1841 work->old_state = RDMA_CM_ROUTE_QUERY;
1842 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1843 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1844 work->event.status = 0;
1846 queue_work(cma_wq, &work->work);
1851 kfree(route->path_rec);
1852 route->path_rec = NULL;
1858 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1860 struct rdma_id_private *id_priv;
1863 id_priv = container_of(id, struct rdma_id_private, id);
1864 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1867 atomic_inc(&id_priv->refcount);
1868 switch (rdma_node_get_transport(id->device->node_type)) {
1869 case RDMA_TRANSPORT_IB:
1870 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1871 case IB_LINK_LAYER_INFINIBAND:
1872 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1874 case IB_LINK_LAYER_ETHERNET:
1875 ret = cma_resolve_iboe_route(id_priv);
1881 case RDMA_TRANSPORT_IWARP:
1882 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1893 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1894 cma_deref_id(id_priv);
1897 EXPORT_SYMBOL(rdma_resolve_route);
1899 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1901 struct cma_device *cma_dev;
1902 struct ib_port_attr port_attr;
1909 if (list_empty(&dev_list)) {
1913 list_for_each_entry(cma_dev, &dev_list, list)
1914 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1915 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1916 port_attr.state == IB_PORT_ACTIVE)
1920 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1923 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1927 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1931 id_priv->id.route.addr.dev_addr.dev_type =
1932 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1933 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1935 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1936 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1937 id_priv->id.port_num = p;
1938 cma_attach_to_dev(id_priv, cma_dev);
1940 mutex_unlock(&lock);
1944 static void addr_handler(int status, struct sockaddr *src_addr,
1945 struct rdma_dev_addr *dev_addr, void *context)
1947 struct rdma_id_private *id_priv = context;
1948 struct rdma_cm_event event;
1950 memset(&event, 0, sizeof event);
1951 mutex_lock(&id_priv->handler_mutex);
1952 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
1953 RDMA_CM_ADDR_RESOLVED))
1956 if (!status && !id_priv->cma_dev)
1957 status = cma_acquire_dev(id_priv);
1960 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1961 RDMA_CM_ADDR_BOUND))
1963 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1964 event.status = status;
1966 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1967 ip_addr_size(src_addr));
1968 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1971 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1972 cma_exch(id_priv, RDMA_CM_DESTROYING);
1973 mutex_unlock(&id_priv->handler_mutex);
1974 cma_deref_id(id_priv);
1975 rdma_destroy_id(&id_priv->id);
1979 mutex_unlock(&id_priv->handler_mutex);
1980 cma_deref_id(id_priv);
1983 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1985 struct cma_work *work;
1986 struct sockaddr *src, *dst;
1990 work = kzalloc(sizeof *work, GFP_KERNEL);
1994 if (!id_priv->cma_dev) {
1995 ret = cma_bind_loopback(id_priv);
2000 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2001 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2003 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2004 if (cma_zero_addr(src)) {
2005 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2006 if ((src->sa_family = dst->sa_family) == AF_INET) {
2007 ((struct sockaddr_in *) src)->sin_addr.s_addr =
2008 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2010 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
2011 &((struct sockaddr_in6 *) dst)->sin6_addr);
2016 INIT_WORK(&work->work, cma_work_handler);
2017 work->old_state = RDMA_CM_ADDR_QUERY;
2018 work->new_state = RDMA_CM_ADDR_RESOLVED;
2019 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2020 queue_work(cma_wq, &work->work);
2027 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2028 struct sockaddr *dst_addr)
2030 if (!src_addr || !src_addr->sa_family) {
2031 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2032 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2033 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2034 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2037 return rdma_bind_addr(id, src_addr);
2040 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2041 struct sockaddr *dst_addr, int timeout_ms)
2043 struct rdma_id_private *id_priv;
2046 id_priv = container_of(id, struct rdma_id_private, id);
2047 if (id_priv->state == RDMA_CM_IDLE) {
2048 ret = cma_bind_addr(id, src_addr, dst_addr);
2053 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2056 atomic_inc(&id_priv->refcount);
2057 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2058 if (cma_any_addr(dst_addr))
2059 ret = cma_resolve_loopback(id_priv);
2061 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2062 dst_addr, &id->route.addr.dev_addr,
2063 timeout_ms, addr_handler, id_priv);
2069 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2070 cma_deref_id(id_priv);
2073 EXPORT_SYMBOL(rdma_resolve_addr);
2075 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2077 struct rdma_id_private *id_priv;
2078 unsigned long flags;
2081 id_priv = container_of(id, struct rdma_id_private, id);
2082 spin_lock_irqsave(&id_priv->lock, flags);
2083 if (id_priv->state == RDMA_CM_IDLE) {
2084 id_priv->reuseaddr = reuse;
2089 spin_unlock_irqrestore(&id_priv->lock, flags);
2092 EXPORT_SYMBOL(rdma_set_reuseaddr);
2094 static void cma_bind_port(struct rdma_bind_list *bind_list,
2095 struct rdma_id_private *id_priv)
2097 struct sockaddr_in *sin;
2099 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2100 sin->sin_port = htons(bind_list->port);
2101 id_priv->bind_list = bind_list;
2102 hlist_add_head(&id_priv->node, &bind_list->owners);
2105 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2106 unsigned short snum)
2108 struct rdma_bind_list *bind_list;
2111 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2116 ret = idr_get_new_above(ps, bind_list, snum, &port);
2117 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2123 ret = -EADDRNOTAVAIL;
2128 bind_list->port = (unsigned short) port;
2129 cma_bind_port(bind_list, id_priv);
2132 idr_remove(ps, port);
2138 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2140 static unsigned int last_used_port;
2141 int low, high, remaining;
2144 inet_get_local_port_range(&low, &high);
2145 remaining = (high - low) + 1;
2146 rover = net_random() % remaining + low;
2148 if (last_used_port != rover &&
2149 !idr_find(ps, (unsigned short) rover)) {
2150 int ret = cma_alloc_port(ps, id_priv, rover);
2152 * Remember previously used port number in order to avoid
2153 * re-using same port immediately after it is closed.
2156 last_used_port = rover;
2157 if (ret != -EADDRNOTAVAIL)
2162 if ((rover < low) || (rover > high))
2166 return -EADDRNOTAVAIL;
2170 * Check that the requested port is available. This is called when trying to
2171 * bind to a specific port, or when trying to listen on a bound port. In
2172 * the latter case, the provided id_priv may already be on the bind_list, but
2173 * we still need to check that it's okay to start listening.
2175 static int cma_check_port(struct rdma_bind_list *bind_list,
2176 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2178 struct rdma_id_private *cur_id;
2179 struct sockaddr *addr, *cur_addr;
2180 struct hlist_node *node;
2182 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2183 if (cma_any_addr(addr) && !reuseaddr)
2184 return -EADDRNOTAVAIL;
2186 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2187 if (id_priv == cur_id)
2190 if ((cur_id->state == RDMA_CM_LISTEN) ||
2191 !reuseaddr || !cur_id->reuseaddr) {
2192 cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
2193 if (cma_any_addr(cur_addr))
2194 return -EADDRNOTAVAIL;
2196 if (!cma_addr_cmp(addr, cur_addr))
2203 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2205 struct rdma_bind_list *bind_list;
2206 unsigned short snum;
2209 snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2210 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2213 bind_list = idr_find(ps, snum);
2215 ret = cma_alloc_port(ps, id_priv, snum);
2217 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2219 cma_bind_port(bind_list, id_priv);
2224 static int cma_bind_listen(struct rdma_id_private *id_priv)
2226 struct rdma_bind_list *bind_list = id_priv->bind_list;
2230 if (bind_list->owners.first->next)
2231 ret = cma_check_port(bind_list, id_priv, 0);
2232 mutex_unlock(&lock);
2236 static int cma_get_port(struct rdma_id_private *id_priv)
2241 switch (id_priv->id.ps) {
2258 return -EPROTONOSUPPORT;
2262 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2263 ret = cma_alloc_any_port(ps, id_priv);
2265 ret = cma_use_port(ps, id_priv);
2266 mutex_unlock(&lock);
2271 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2272 struct sockaddr *addr)
2274 #if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
2275 struct sockaddr_in6 *sin6;
2277 if (addr->sa_family != AF_INET6)
2280 sin6 = (struct sockaddr_in6 *) addr;
2281 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2282 !sin6->sin6_scope_id)
2285 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2290 int rdma_listen(struct rdma_cm_id *id, int backlog)
2292 struct rdma_id_private *id_priv;
2295 id_priv = container_of(id, struct rdma_id_private, id);
2296 if (id_priv->state == RDMA_CM_IDLE) {
2297 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
2298 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
2303 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2306 if (id_priv->reuseaddr) {
2307 ret = cma_bind_listen(id_priv);
2312 id_priv->backlog = backlog;
2314 switch (rdma_node_get_transport(id->device->node_type)) {
2315 case RDMA_TRANSPORT_IB:
2316 ret = cma_ib_listen(id_priv);
2320 case RDMA_TRANSPORT_IWARP:
2321 ret = cma_iw_listen(id_priv, backlog);
2330 cma_listen_on_all(id_priv);
2334 id_priv->backlog = 0;
2335 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2338 EXPORT_SYMBOL(rdma_listen);
2340 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2342 struct rdma_id_private *id_priv;
2345 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2346 return -EAFNOSUPPORT;
2348 id_priv = container_of(id, struct rdma_id_private, id);
2349 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2352 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2356 if (!cma_any_addr(addr)) {
2357 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2361 ret = cma_acquire_dev(id_priv);
2366 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2367 ret = cma_get_port(id_priv);
2373 if (id_priv->cma_dev)
2374 cma_release_dev(id_priv);
2376 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2379 EXPORT_SYMBOL(rdma_bind_addr);
2381 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2382 struct rdma_route *route)
2384 struct cma_hdr *cma_hdr;
2385 struct sdp_hh *sdp_hdr;
2387 if (route->addr.src_addr.ss_family == AF_INET) {
2388 struct sockaddr_in *src4, *dst4;
2390 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2391 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2396 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2398 sdp_set_ip_ver(sdp_hdr, 4);
2399 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2400 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2401 sdp_hdr->port = src4->sin_port;
2405 cma_hdr->cma_version = CMA_VERSION;
2406 cma_set_ip_ver(cma_hdr, 4);
2407 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2408 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2409 cma_hdr->port = src4->sin_port;
2413 struct sockaddr_in6 *src6, *dst6;
2415 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2416 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2421 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2423 sdp_set_ip_ver(sdp_hdr, 6);
2424 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2425 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2426 sdp_hdr->port = src6->sin6_port;
2430 cma_hdr->cma_version = CMA_VERSION;
2431 cma_set_ip_ver(cma_hdr, 6);
2432 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2433 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2434 cma_hdr->port = src6->sin6_port;
2441 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2442 struct ib_cm_event *ib_event)
2444 struct rdma_id_private *id_priv = cm_id->context;
2445 struct rdma_cm_event event;
2446 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2449 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2452 memset(&event, 0, sizeof event);
2453 switch (ib_event->event) {
2454 case IB_CM_SIDR_REQ_ERROR:
2455 event.event = RDMA_CM_EVENT_UNREACHABLE;
2456 event.status = -ETIMEDOUT;
2458 case IB_CM_SIDR_REP_RECEIVED:
2459 event.param.ud.private_data = ib_event->private_data;
2460 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2461 if (rep->status != IB_SIDR_SUCCESS) {
2462 event.event = RDMA_CM_EVENT_UNREACHABLE;
2463 event.status = ib_event->param.sidr_rep_rcvd.status;
2466 ret = cma_set_qkey(id_priv);
2468 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2469 event.status = -EINVAL;
2472 if (id_priv->qkey != rep->qkey) {
2473 event.event = RDMA_CM_EVENT_UNREACHABLE;
2474 event.status = -EINVAL;
2477 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2478 id_priv->id.route.path_rec,
2479 &event.param.ud.ah_attr);
2480 event.param.ud.qp_num = rep->qpn;
2481 event.param.ud.qkey = rep->qkey;
2482 event.event = RDMA_CM_EVENT_ESTABLISHED;
2486 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2491 ret = id_priv->id.event_handler(&id_priv->id, &event);
2493 /* Destroy the CM ID by returning a non-zero value. */
2494 id_priv->cm_id.ib = NULL;
2495 cma_exch(id_priv, RDMA_CM_DESTROYING);
2496 mutex_unlock(&id_priv->handler_mutex);
2497 rdma_destroy_id(&id_priv->id);
2501 mutex_unlock(&id_priv->handler_mutex);
2505 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2506 struct rdma_conn_param *conn_param)
2508 struct ib_cm_sidr_req_param req;
2509 struct rdma_route *route;
2510 struct ib_cm_id *id;
2513 req.private_data_len = sizeof(struct cma_hdr) +
2514 conn_param->private_data_len;
2515 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2516 if (!req.private_data)
2519 if (conn_param->private_data && conn_param->private_data_len)
2520 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2521 conn_param->private_data, conn_param->private_data_len);
2523 route = &id_priv->id.route;
2524 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2528 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2534 id_priv->cm_id.ib = id;
2536 req.path = route->path_rec;
2537 req.service_id = cma_get_service_id(id_priv->id.ps,
2538 (struct sockaddr *) &route->addr.dst_addr);
2539 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2540 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2542 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2544 ib_destroy_cm_id(id_priv->cm_id.ib);
2545 id_priv->cm_id.ib = NULL;
2548 kfree(req.private_data);
2552 static int cma_connect_ib(struct rdma_id_private *id_priv,
2553 struct rdma_conn_param *conn_param)
2555 struct ib_cm_req_param req;
2556 struct rdma_route *route;
2558 struct ib_cm_id *id;
2561 memset(&req, 0, sizeof req);
2562 offset = cma_user_data_offset(id_priv->id.ps);
2563 req.private_data_len = offset + conn_param->private_data_len;
2564 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2568 if (conn_param->private_data && conn_param->private_data_len)
2569 memcpy(private_data + offset, conn_param->private_data,
2570 conn_param->private_data_len);
2572 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2577 id_priv->cm_id.ib = id;
2579 route = &id_priv->id.route;
2580 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2583 req.private_data = private_data;
2585 req.primary_path = &route->path_rec[0];
2586 if (route->num_paths == 2)
2587 req.alternate_path = &route->path_rec[1];
2589 req.service_id = cma_get_service_id(id_priv->id.ps,
2590 (struct sockaddr *) &route->addr.dst_addr);
2591 req.qp_num = id_priv->qp_num;
2592 req.qp_type = id_priv->id.qp_type;
2593 req.starting_psn = id_priv->seq_num;
2594 req.responder_resources = conn_param->responder_resources;
2595 req.initiator_depth = conn_param->initiator_depth;
2596 req.flow_control = conn_param->flow_control;
2597 req.retry_count = conn_param->retry_count;
2598 req.rnr_retry_count = conn_param->rnr_retry_count;
2599 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2600 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2601 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2602 req.srq = id_priv->srq ? 1 : 0;
2604 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2606 if (ret && !IS_ERR(id)) {
2607 ib_destroy_cm_id(id);
2608 id_priv->cm_id.ib = NULL;
2611 kfree(private_data);
2615 static int cma_connect_iw(struct rdma_id_private *id_priv,
2616 struct rdma_conn_param *conn_param)
2618 struct iw_cm_id *cm_id;
2619 struct sockaddr_in* sin;
2621 struct iw_cm_conn_param iw_param;
2623 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2625 return PTR_ERR(cm_id);
2627 id_priv->cm_id.iw = cm_id;
2629 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2630 cm_id->local_addr = *sin;
2632 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2633 cm_id->remote_addr = *sin;
2635 ret = cma_modify_qp_rtr(id_priv, conn_param);
2640 iw_param.ord = conn_param->initiator_depth;
2641 iw_param.ird = conn_param->responder_resources;
2642 iw_param.private_data = conn_param->private_data;
2643 iw_param.private_data_len = conn_param->private_data_len;
2644 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2646 memset(&iw_param, 0, sizeof iw_param);
2647 iw_param.qpn = id_priv->qp_num;
2649 ret = iw_cm_connect(cm_id, &iw_param);
2652 iw_destroy_cm_id(cm_id);
2653 id_priv->cm_id.iw = NULL;
2658 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2660 struct rdma_id_private *id_priv;
2663 id_priv = container_of(id, struct rdma_id_private, id);
2664 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2668 id_priv->qp_num = conn_param->qp_num;
2669 id_priv->srq = conn_param->srq;
2672 switch (rdma_node_get_transport(id->device->node_type)) {
2673 case RDMA_TRANSPORT_IB:
2674 if (id->qp_type == IB_QPT_UD)
2675 ret = cma_resolve_ib_udp(id_priv, conn_param);
2677 ret = cma_connect_ib(id_priv, conn_param);
2679 case RDMA_TRANSPORT_IWARP:
2680 ret = cma_connect_iw(id_priv, conn_param);
2691 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2694 EXPORT_SYMBOL(rdma_connect);
2696 static int cma_accept_ib(struct rdma_id_private *id_priv,
2697 struct rdma_conn_param *conn_param)
2699 struct ib_cm_rep_param rep;
2702 ret = cma_modify_qp_rtr(id_priv, conn_param);
2706 ret = cma_modify_qp_rts(id_priv, conn_param);
2710 memset(&rep, 0, sizeof rep);
2711 rep.qp_num = id_priv->qp_num;
2712 rep.starting_psn = id_priv->seq_num;
2713 rep.private_data = conn_param->private_data;
2714 rep.private_data_len = conn_param->private_data_len;
2715 rep.responder_resources = conn_param->responder_resources;
2716 rep.initiator_depth = conn_param->initiator_depth;
2717 rep.failover_accepted = 0;
2718 rep.flow_control = conn_param->flow_control;
2719 rep.rnr_retry_count = conn_param->rnr_retry_count;
2720 rep.srq = id_priv->srq ? 1 : 0;
2722 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2727 static int cma_accept_iw(struct rdma_id_private *id_priv,
2728 struct rdma_conn_param *conn_param)
2730 struct iw_cm_conn_param iw_param;
2733 ret = cma_modify_qp_rtr(id_priv, conn_param);
2737 iw_param.ord = conn_param->initiator_depth;
2738 iw_param.ird = conn_param->responder_resources;
2739 iw_param.private_data = conn_param->private_data;
2740 iw_param.private_data_len = conn_param->private_data_len;
2741 if (id_priv->id.qp) {
2742 iw_param.qpn = id_priv->qp_num;
2744 iw_param.qpn = conn_param->qp_num;
2746 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2749 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2750 enum ib_cm_sidr_status status,
2751 const void *private_data, int private_data_len)
2753 struct ib_cm_sidr_rep_param rep;
2756 memset(&rep, 0, sizeof rep);
2757 rep.status = status;
2758 if (status == IB_SIDR_SUCCESS) {
2759 ret = cma_set_qkey(id_priv);
2762 rep.qp_num = id_priv->qp_num;
2763 rep.qkey = id_priv->qkey;
2765 rep.private_data = private_data;
2766 rep.private_data_len = private_data_len;
2768 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2771 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2773 struct rdma_id_private *id_priv;
2776 id_priv = container_of(id, struct rdma_id_private, id);
2778 id_priv->owner = task_pid_nr(current);
2780 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2783 if (!id->qp && conn_param) {
2784 id_priv->qp_num = conn_param->qp_num;
2785 id_priv->srq = conn_param->srq;
2788 switch (rdma_node_get_transport(id->device->node_type)) {
2789 case RDMA_TRANSPORT_IB:
2790 if (id->qp_type == IB_QPT_UD) {
2792 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2793 conn_param->private_data,
2794 conn_param->private_data_len);
2796 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2800 ret = cma_accept_ib(id_priv, conn_param);
2802 ret = cma_rep_recv(id_priv);
2805 case RDMA_TRANSPORT_IWARP:
2806 ret = cma_accept_iw(id_priv, conn_param);
2818 cma_modify_qp_err(id_priv);
2819 rdma_reject(id, NULL, 0);
2822 EXPORT_SYMBOL(rdma_accept);
2824 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2826 struct rdma_id_private *id_priv;
2829 id_priv = container_of(id, struct rdma_id_private, id);
2830 if (!id_priv->cm_id.ib)
2833 switch (id->device->node_type) {
2834 case RDMA_NODE_IB_CA:
2835 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2843 EXPORT_SYMBOL(rdma_notify);
2845 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2846 u8 private_data_len)
2848 struct rdma_id_private *id_priv;
2851 id_priv = container_of(id, struct rdma_id_private, id);
2852 if (!id_priv->cm_id.ib)
2855 switch (rdma_node_get_transport(id->device->node_type)) {
2856 case RDMA_TRANSPORT_IB:
2857 if (id->qp_type == IB_QPT_UD)
2858 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2859 private_data, private_data_len);
2861 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2862 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2863 0, private_data, private_data_len);
2865 case RDMA_TRANSPORT_IWARP:
2866 ret = iw_cm_reject(id_priv->cm_id.iw,
2867 private_data, private_data_len);
2875 EXPORT_SYMBOL(rdma_reject);
2877 int rdma_disconnect(struct rdma_cm_id *id)
2879 struct rdma_id_private *id_priv;
2882 id_priv = container_of(id, struct rdma_id_private, id);
2883 if (!id_priv->cm_id.ib)
2886 switch (rdma_node_get_transport(id->device->node_type)) {
2887 case RDMA_TRANSPORT_IB:
2888 ret = cma_modify_qp_err(id_priv);
2891 /* Initiate or respond to a disconnect. */
2892 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2893 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2895 case RDMA_TRANSPORT_IWARP:
2896 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2905 EXPORT_SYMBOL(rdma_disconnect);
2907 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2909 struct rdma_id_private *id_priv;
2910 struct cma_multicast *mc = multicast->context;
2911 struct rdma_cm_event event;
2914 id_priv = mc->id_priv;
2915 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
2916 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
2919 mutex_lock(&id_priv->qp_mutex);
2920 if (!status && id_priv->id.qp)
2921 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2922 multicast->rec.mlid);
2923 mutex_unlock(&id_priv->qp_mutex);
2925 memset(&event, 0, sizeof event);
2926 event.status = status;
2927 event.param.ud.private_data = mc->context;
2929 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2930 ib_init_ah_from_mcmember(id_priv->id.device,
2931 id_priv->id.port_num, &multicast->rec,
2932 &event.param.ud.ah_attr);
2933 event.param.ud.qp_num = 0xFFFFFF;
2934 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2936 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2938 ret = id_priv->id.event_handler(&id_priv->id, &event);
2940 cma_exch(id_priv, RDMA_CM_DESTROYING);
2941 mutex_unlock(&id_priv->handler_mutex);
2942 rdma_destroy_id(&id_priv->id);
2946 mutex_unlock(&id_priv->handler_mutex);
2950 static void cma_set_mgid(struct rdma_id_private *id_priv,
2951 struct sockaddr *addr, union ib_gid *mgid)
2953 unsigned char mc_map[MAX_ADDR_LEN];
2954 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2955 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2956 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2958 if (cma_any_addr(addr)) {
2959 memset(mgid, 0, sizeof *mgid);
2960 } else if ((addr->sa_family == AF_INET6) &&
2961 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
2963 /* IPv6 address is an SA assigned MGID. */
2964 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2965 } else if ((addr->sa_family == AF_INET6)) {
2966 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2967 if (id_priv->id.ps == RDMA_PS_UDP)
2968 mc_map[7] = 0x01; /* Use RDMA CM signature */
2969 *mgid = *(union ib_gid *) (mc_map + 4);
2971 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
2972 if (id_priv->id.ps == RDMA_PS_UDP)
2973 mc_map[7] = 0x01; /* Use RDMA CM signature */
2974 *mgid = *(union ib_gid *) (mc_map + 4);
2978 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2979 struct cma_multicast *mc)
2981 struct ib_sa_mcmember_rec rec;
2982 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2983 ib_sa_comp_mask comp_mask;
2986 ib_addr_get_mgid(dev_addr, &rec.mgid);
2987 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2992 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
2993 if (id_priv->id.ps == RDMA_PS_UDP)
2994 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2995 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
2996 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2999 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3000 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3001 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3002 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3003 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3005 if (id_priv->id.ps == RDMA_PS_IPOIB)
3006 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3007 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
3009 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3010 id_priv->id.port_num, &rec,
3011 comp_mask, GFP_KERNEL,
3012 cma_ib_mc_handler, mc);
3013 if (IS_ERR(mc->multicast.ib))
3014 return PTR_ERR(mc->multicast.ib);
3019 static void iboe_mcast_work_handler(struct work_struct *work)
3021 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3022 struct cma_multicast *mc = mw->mc;
3023 struct ib_sa_multicast *m = mc->multicast.ib;
3025 mc->multicast.ib->context = mc;
3026 cma_ib_mc_handler(0, m);
3027 kref_put(&mc->mcref, release_mc);
3031 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3033 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3034 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3036 if (cma_any_addr(addr)) {
3037 memset(mgid, 0, sizeof *mgid);
3038 } else if (addr->sa_family == AF_INET6) {
3039 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3041 mgid->raw[0] = 0xff;
3042 mgid->raw[1] = 0x0e;
3051 mgid->raw[10] = 0xff;
3052 mgid->raw[11] = 0xff;
3053 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3057 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3058 struct cma_multicast *mc)
3060 struct iboe_mcast_work *work;
3061 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3063 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3064 struct net_device *ndev = NULL;
3066 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3069 work = kzalloc(sizeof *work, GFP_KERNEL);
3073 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3074 if (!mc->multicast.ib) {
3079 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3081 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3082 if (id_priv->id.ps == RDMA_PS_UDP)
3083 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3085 if (dev_addr->bound_dev_if)
3086 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3091 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3092 mc->multicast.ib->rec.hop_limit = 1;
3093 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3095 if (!mc->multicast.ib->rec.mtu) {
3099 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3102 INIT_WORK(&work->work, iboe_mcast_work_handler);
3103 kref_get(&mc->mcref);
3104 queue_work(cma_wq, &work->work);
3109 kfree(mc->multicast.ib);
3115 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3118 struct rdma_id_private *id_priv;
3119 struct cma_multicast *mc;
3122 id_priv = container_of(id, struct rdma_id_private, id);
3123 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3124 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3127 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3131 memcpy(&mc->addr, addr, ip_addr_size(addr));
3132 mc->context = context;
3133 mc->id_priv = id_priv;
3135 spin_lock(&id_priv->lock);
3136 list_add(&mc->list, &id_priv->mc_list);
3137 spin_unlock(&id_priv->lock);
3139 switch (rdma_node_get_transport(id->device->node_type)) {
3140 case RDMA_TRANSPORT_IB:
3141 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3142 case IB_LINK_LAYER_INFINIBAND:
3143 ret = cma_join_ib_multicast(id_priv, mc);
3145 case IB_LINK_LAYER_ETHERNET:
3146 kref_init(&mc->mcref);
3147 ret = cma_iboe_join_multicast(id_priv, mc);
3159 spin_lock_irq(&id_priv->lock);
3160 list_del(&mc->list);
3161 spin_unlock_irq(&id_priv->lock);
3166 EXPORT_SYMBOL(rdma_join_multicast);
3168 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3170 struct rdma_id_private *id_priv;
3171 struct cma_multicast *mc;
3173 id_priv = container_of(id, struct rdma_id_private, id);
3174 spin_lock_irq(&id_priv->lock);
3175 list_for_each_entry(mc, &id_priv->mc_list, list) {
3176 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3177 list_del(&mc->list);
3178 spin_unlock_irq(&id_priv->lock);
3181 ib_detach_mcast(id->qp,
3182 &mc->multicast.ib->rec.mgid,
3183 mc->multicast.ib->rec.mlid);
3184 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3185 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3186 case IB_LINK_LAYER_INFINIBAND:
3187 ib_sa_free_multicast(mc->multicast.ib);
3190 case IB_LINK_LAYER_ETHERNET:
3191 kref_put(&mc->mcref, release_mc);
3200 spin_unlock_irq(&id_priv->lock);
3202 EXPORT_SYMBOL(rdma_leave_multicast);
3204 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3206 struct rdma_dev_addr *dev_addr;
3207 struct cma_ndev_work *work;
3209 dev_addr = &id_priv->id.route.addr.dev_addr;
3211 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3212 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3213 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3214 ndev->name, &id_priv->id);
3215 work = kzalloc(sizeof *work, GFP_KERNEL);
3219 INIT_WORK(&work->work, cma_ndev_work_handler);
3221 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3222 atomic_inc(&id_priv->refcount);
3223 queue_work(cma_wq, &work->work);
3229 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3232 struct net_device *ndev = (struct net_device *)ctx;
3233 struct cma_device *cma_dev;
3234 struct rdma_id_private *id_priv;
3235 int ret = NOTIFY_DONE;
3237 if (dev_net(ndev) != &init_net)
3240 if (event != NETDEV_BONDING_FAILOVER)
3243 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3247 list_for_each_entry(cma_dev, &dev_list, list)
3248 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3249 ret = cma_netdev_change(ndev, id_priv);
3255 mutex_unlock(&lock);
3259 static struct notifier_block cma_nb = {
3260 .notifier_call = cma_netdev_callback
3263 static void cma_add_one(struct ib_device *device)
3265 struct cma_device *cma_dev;
3266 struct rdma_id_private *id_priv;
3268 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3272 cma_dev->device = device;
3274 init_completion(&cma_dev->comp);
3275 atomic_set(&cma_dev->refcount, 1);
3276 INIT_LIST_HEAD(&cma_dev->id_list);
3277 ib_set_client_data(device, &cma_client, cma_dev);
3280 list_add_tail(&cma_dev->list, &dev_list);
3281 list_for_each_entry(id_priv, &listen_any_list, list)
3282 cma_listen_on_dev(id_priv, cma_dev);
3283 mutex_unlock(&lock);
3286 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3288 struct rdma_cm_event event;
3289 enum rdma_cm_state state;
3292 /* Record that we want to remove the device */
3293 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3294 if (state == RDMA_CM_DESTROYING)
3297 cma_cancel_operation(id_priv, state);
3298 mutex_lock(&id_priv->handler_mutex);
3300 /* Check for destruction from another callback. */
3301 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3304 memset(&event, 0, sizeof event);
3305 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3306 ret = id_priv->id.event_handler(&id_priv->id, &event);
3308 mutex_unlock(&id_priv->handler_mutex);
3312 static void cma_process_remove(struct cma_device *cma_dev)
3314 struct rdma_id_private *id_priv;
3318 while (!list_empty(&cma_dev->id_list)) {
3319 id_priv = list_entry(cma_dev->id_list.next,
3320 struct rdma_id_private, list);
3322 list_del(&id_priv->listen_list);
3323 list_del_init(&id_priv->list);
3324 atomic_inc(&id_priv->refcount);
3325 mutex_unlock(&lock);
3327 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3328 cma_deref_id(id_priv);
3330 rdma_destroy_id(&id_priv->id);
3334 mutex_unlock(&lock);
3336 cma_deref_dev(cma_dev);
3337 wait_for_completion(&cma_dev->comp);
3340 static void cma_remove_one(struct ib_device *device)
3342 struct cma_device *cma_dev;
3344 cma_dev = ib_get_client_data(device, &cma_client);
3349 list_del(&cma_dev->list);
3350 mutex_unlock(&lock);
3352 cma_process_remove(cma_dev);
3356 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3358 struct nlmsghdr *nlh;
3359 struct rdma_cm_id_stats *id_stats;
3360 struct rdma_id_private *id_priv;
3361 struct rdma_cm_id *id = NULL;
3362 struct cma_device *cma_dev;
3363 int i_dev = 0, i_id = 0;
3366 * We export all of the IDs as a sequence of messages. Each
3367 * ID gets its own netlink message.
3371 list_for_each_entry(cma_dev, &dev_list, list) {
3372 if (i_dev < cb->args[0]) {
3378 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3379 if (i_id < cb->args[1]) {
3384 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3385 sizeof *id_stats, RDMA_NL_RDMA_CM,
3386 RDMA_NL_RDMA_CM_ID_STATS);
3390 memset(id_stats, 0, sizeof *id_stats);
3392 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3393 id_stats->port_num = id->port_num;
3394 id_stats->bound_dev_if =
3395 id->route.addr.dev_addr.bound_dev_if;
3397 if (id->route.addr.src_addr.ss_family == AF_INET) {
3398 if (ibnl_put_attr(skb, nlh,
3399 sizeof(struct sockaddr_in),
3400 &id->route.addr.src_addr,
3401 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3404 if (ibnl_put_attr(skb, nlh,
3405 sizeof(struct sockaddr_in),
3406 &id->route.addr.dst_addr,
3407 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3410 } else if (id->route.addr.src_addr.ss_family == AF_INET6) {
3411 if (ibnl_put_attr(skb, nlh,
3412 sizeof(struct sockaddr_in6),
3413 &id->route.addr.src_addr,
3414 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
3417 if (ibnl_put_attr(skb, nlh,
3418 sizeof(struct sockaddr_in6),
3419 &id->route.addr.dst_addr,
3420 RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
3425 id_stats->pid = id_priv->owner;
3426 id_stats->port_space = id->ps;
3427 id_stats->cm_state = id_priv->state;
3428 id_stats->qp_num = id_priv->qp_num;
3429 id_stats->qp_type = id->qp_type;
3439 mutex_unlock(&lock);
3440 cb->args[0] = i_dev;
3446 static const struct ibnl_client_cbs cma_cb_table[] = {
3447 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats },
3450 static int __init cma_init(void)
3454 cma_wq = create_singlethread_workqueue("rdma_cm");
3458 ib_sa_register_client(&sa_client);
3459 rdma_addr_register_client(&addr_client);
3460 register_netdevice_notifier(&cma_nb);
3462 ret = ib_register_client(&cma_client);
3466 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3467 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3472 unregister_netdevice_notifier(&cma_nb);
3473 rdma_addr_unregister_client(&addr_client);
3474 ib_sa_unregister_client(&sa_client);
3475 destroy_workqueue(cma_wq);
3479 static void __exit cma_cleanup(void)
3481 ibnl_remove_client(RDMA_NL_RDMA_CM);
3482 ib_unregister_client(&cma_client);
3483 unregister_netdevice_notifier(&cma_nb);
3484 rdma_addr_unregister_client(&addr_client);
3485 ib_sa_unregister_client(&sa_client);
3486 destroy_workqueue(cma_wq);
3487 idr_destroy(&sdp_ps);
3488 idr_destroy(&tcp_ps);
3489 idr_destroy(&udp_ps);
3490 idr_destroy(&ipoib_ps);
3491 idr_destroy(&ib_ps);
3494 module_init(cma_init);
3495 module_exit(cma_cleanup);