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>
47 #include <rdma/rdma_cm.h>
48 #include <rdma/rdma_cm_ib.h>
49 #include <rdma/ib_cache.h>
50 #include <rdma/ib_cm.h>
51 #include <rdma/ib_sa.h>
52 #include <rdma/iw_cm.h>
54 MODULE_AUTHOR("Sean Hefty");
55 MODULE_DESCRIPTION("Generic RDMA CM Agent");
56 MODULE_LICENSE("Dual BSD/GPL");
58 static int tavor_quirk = 0;
59 module_param_named(tavor_quirk, tavor_quirk, int, 0644);
60 MODULE_PARM_DESC(tavor_quirk, "Tavor performance quirk: limit MTU to 1K if > 0");
62 int unify_tcp_port_space = 0;
63 module_param(unify_tcp_port_space, int, 0644);
64 MODULE_PARM_DESC(unify_tcp_port_space, "Unify the host TCP and RDMA port "
65 "space allocation (default=0)");
67 #define CMA_CM_RESPONSE_TIMEOUT 20
68 #define CMA_MAX_CM_RETRIES 15
69 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
70 #define IBOE_PACKET_LIFETIME 18
72 static int cma_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
73 module_param_named(cma_response_timeout, cma_response_timeout, int, 0644);
74 MODULE_PARM_DESC(cma_response_timeout, "CMA_CM_RESPONSE_TIMEOUT default=20");
76 static int def_prec2sl = 3;
77 module_param_named(def_prec2sl, def_prec2sl, int, 0644);
78 MODULE_PARM_DESC(def_prec2sl, "Default value for SL priority with RoCE. Valid values 0 - 7");
80 static void cma_add_one(struct ib_device *device);
81 static void cma_remove_one(struct ib_device *device);
83 static struct ib_client cma_client = {
86 .remove = cma_remove_one
89 static struct ib_sa_client sa_client;
90 static struct rdma_addr_client addr_client;
91 static LIST_HEAD(dev_list);
92 static LIST_HEAD(listen_any_list);
93 static DEFINE_MUTEX(lock);
94 static struct workqueue_struct *cma_wq;
95 static DEFINE_IDR(sdp_ps);
96 static DEFINE_IDR(tcp_ps);
97 static DEFINE_IDR(udp_ps);
98 static DEFINE_IDR(ipoib_ps);
102 struct list_head list;
103 struct ib_device *device;
104 struct completion comp;
106 struct list_head id_list;
123 struct rdma_bind_list {
125 struct hlist_head owners;
130 * Device removal can occur at anytime, so we need extra handling to
131 * serialize notifying the user of device removal with other callbacks.
132 * We do this by disabling removal notification while a callback is in process,
133 * and reporting it after the callback completes.
135 struct rdma_id_private {
136 struct rdma_cm_id id;
138 struct rdma_bind_list *bind_list;
140 struct hlist_node node;
141 struct list_head list; /* listen_any_list or cma_device.list */
142 struct list_head listen_list; /* per device listens */
143 struct cma_device *cma_dev;
144 struct list_head mc_list;
147 enum cma_state state;
149 struct mutex qp_mutex;
151 struct completion comp;
153 struct mutex handler_mutex;
157 struct ib_sa_query *query;
171 struct cma_multicast {
172 struct rdma_id_private *id_priv;
174 struct ib_sa_multicast *ib;
176 struct list_head list;
178 struct sockaddr_storage addr;
183 struct work_struct work;
184 struct rdma_id_private *id;
185 enum cma_state old_state;
186 enum cma_state new_state;
187 struct rdma_cm_event event;
190 struct cma_ndev_work {
191 struct work_struct work;
192 struct rdma_id_private *id;
193 struct rdma_cm_event event;
196 struct iboe_mcast_work {
197 struct work_struct work;
198 struct rdma_id_private *id;
199 struct cma_multicast *mc;
212 u8 ip_version; /* IP version: 7:4 */
214 union cma_ip_addr src_addr;
215 union cma_ip_addr dst_addr;
220 u8 sdp_version; /* Major version: 7:4 */
221 u8 ip_version; /* IP version: 7:4 */
222 u8 sdp_specific1[10];
224 __be16 sdp_specific2;
225 union cma_ip_addr src_addr;
226 union cma_ip_addr dst_addr;
234 #define CMA_VERSION 0x00
235 #define SDP_MAJ_VERSION 0x2
237 static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
242 spin_lock_irqsave(&id_priv->lock, flags);
243 ret = (id_priv->state == comp);
244 spin_unlock_irqrestore(&id_priv->lock, flags);
248 static int cma_comp_exch(struct rdma_id_private *id_priv,
249 enum cma_state comp, enum cma_state exch)
254 spin_lock_irqsave(&id_priv->lock, flags);
255 if ((ret = (id_priv->state == comp)))
256 id_priv->state = exch;
257 spin_unlock_irqrestore(&id_priv->lock, flags);
261 static enum cma_state cma_exch(struct rdma_id_private *id_priv,
267 spin_lock_irqsave(&id_priv->lock, flags);
268 old = id_priv->state;
269 id_priv->state = exch;
270 spin_unlock_irqrestore(&id_priv->lock, flags);
274 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
276 return hdr->ip_version >> 4;
279 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
281 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
284 static inline u8 sdp_get_majv(u8 sdp_version)
286 return sdp_version >> 4;
289 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
291 return hh->ip_version >> 4;
294 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
296 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
299 static inline int cma_is_ud_ps(enum rdma_port_space ps)
301 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
304 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
305 struct cma_device *cma_dev)
307 atomic_inc(&cma_dev->refcount);
308 id_priv->cma_dev = cma_dev;
309 id_priv->id.device = cma_dev->device;
310 id_priv->id.route.addr.dev_addr.transport =
311 rdma_node_get_transport(cma_dev->device->node_type);
312 list_add_tail(&id_priv->list, &cma_dev->id_list);
315 static inline void cma_deref_dev(struct cma_device *cma_dev)
317 if (atomic_dec_and_test(&cma_dev->refcount))
318 complete(&cma_dev->comp);
321 static inline void release_mc(struct kref *kref)
323 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
325 kfree(mc->multicast.ib);
329 static void cma_detach_from_dev(struct rdma_id_private *id_priv)
331 list_del(&id_priv->list);
332 cma_deref_dev(id_priv->cma_dev);
333 id_priv->cma_dev = NULL;
336 static int cma_set_qkey(struct rdma_id_private *id_priv)
338 struct ib_sa_mcmember_rec rec;
344 switch (id_priv->id.ps) {
346 id_priv->qkey = RDMA_UDP_QKEY;
349 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
350 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
351 id_priv->id.port_num, &rec.mgid,
354 id_priv->qkey = be32_to_cpu(rec.qkey);
362 static int cma_acquire_dev(struct rdma_id_private *id_priv)
364 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
365 struct cma_device *cma_dev;
369 if (dev_addr->dev_type != ARPHRD_INFINIBAND) {
370 iboe_addr_get_sgid(dev_addr, &gid);
371 list_for_each_entry(cma_dev, &dev_list, list) {
372 ret = ib_find_cached_gid(cma_dev->device, &gid,
373 &id_priv->id.port_num, NULL);
379 memcpy(&gid, dev_addr->src_dev_addr +
380 rdma_addr_gid_offset(dev_addr), sizeof gid);
381 list_for_each_entry(cma_dev, &dev_list, list) {
382 ret = ib_find_cached_gid(cma_dev->device, &gid,
383 &id_priv->id.port_num, NULL);
390 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 cma_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 = CMA_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 inline __be16 cma_port(struct sockaddr *addr)
704 if (addr->sa_family == AF_INET)
705 return ((struct sockaddr_in *) addr)->sin_port;
707 return ((struct sockaddr_in6 *) addr)->sin6_port;
710 static inline int cma_any_port(struct sockaddr *addr)
712 return !cma_port(addr);
715 static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
716 u8 *ip_ver, __be16 *port,
717 union cma_ip_addr **src, union cma_ip_addr **dst)
721 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
725 *ip_ver = sdp_get_ip_ver(hdr);
726 *port = ((struct sdp_hh *) hdr)->port;
727 *src = &((struct sdp_hh *) hdr)->src_addr;
728 *dst = &((struct sdp_hh *) hdr)->dst_addr;
731 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
734 *ip_ver = cma_get_ip_ver(hdr);
735 *port = ((struct cma_hdr *) hdr)->port;
736 *src = &((struct cma_hdr *) hdr)->src_addr;
737 *dst = &((struct cma_hdr *) hdr)->dst_addr;
741 if (*ip_ver != 4 && *ip_ver != 6)
746 static void cma_save_net_info(struct rdma_addr *addr,
747 struct rdma_addr *listen_addr,
748 u8 ip_ver, __be16 port,
749 union cma_ip_addr *src, union cma_ip_addr *dst)
751 struct sockaddr_in *listen4, *ip4;
752 struct sockaddr_in6 *listen6, *ip6;
756 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
757 ip4 = (struct sockaddr_in *) &addr->src_addr;
758 ip4->sin_family = listen4->sin_family;
759 ip4->sin_addr.s_addr = dst->ip4.addr;
760 ip4->sin_port = listen4->sin_port;
762 ip4 = (struct sockaddr_in *) &addr->dst_addr;
763 ip4->sin_family = listen4->sin_family;
764 ip4->sin_addr.s_addr = src->ip4.addr;
765 ip4->sin_port = port;
768 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
769 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
770 ip6->sin6_family = listen6->sin6_family;
771 ip6->sin6_addr = dst->ip6;
772 ip6->sin6_port = listen6->sin6_port;
774 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
775 ip6->sin6_family = listen6->sin6_family;
776 ip6->sin6_addr = src->ip6;
777 ip6->sin6_port = port;
784 static inline int cma_user_data_offset(enum rdma_port_space ps)
790 return sizeof(struct cma_hdr);
794 static void cma_cancel_route(struct rdma_id_private *id_priv)
796 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
797 case IB_LINK_LAYER_INFINIBAND:
799 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
806 static void cma_cancel_listens(struct rdma_id_private *id_priv)
808 struct rdma_id_private *dev_id_priv;
811 * Remove from listen_any_list to prevent added devices from spawning
812 * additional listen requests.
815 list_del(&id_priv->list);
817 while (!list_empty(&id_priv->listen_list)) {
818 dev_id_priv = list_entry(id_priv->listen_list.next,
819 struct rdma_id_private, listen_list);
820 /* sync with device removal to avoid duplicate destruction */
821 list_del_init(&dev_id_priv->list);
822 list_del(&dev_id_priv->listen_list);
825 rdma_destroy_id(&dev_id_priv->id);
831 static void cma_cancel_operation(struct rdma_id_private *id_priv,
832 enum cma_state state)
836 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
838 case CMA_ROUTE_QUERY:
839 cma_cancel_route(id_priv);
842 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
843 && !id_priv->cma_dev)
844 cma_cancel_listens(id_priv);
851 static void cma_release_port(struct rdma_id_private *id_priv)
853 struct rdma_bind_list *bind_list = id_priv->bind_list;
859 hlist_del(&id_priv->node);
860 if (hlist_empty(&bind_list->owners)) {
861 idr_remove(bind_list->ps, bind_list->port);
866 sock_release(id_priv->sock);
869 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
871 struct cma_multicast *mc;
873 while (!list_empty(&id_priv->mc_list)) {
874 mc = container_of(id_priv->mc_list.next,
875 struct cma_multicast, list);
877 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
878 case IB_LINK_LAYER_INFINIBAND:
879 ib_sa_free_multicast(mc->multicast.ib);
882 case IB_LINK_LAYER_ETHERNET:
883 kref_put(&mc->mcref, release_mc);
891 void rdma_destroy_id(struct rdma_cm_id *id)
893 struct rdma_id_private *id_priv;
894 enum cma_state state;
896 id_priv = container_of(id, struct rdma_id_private, id);
897 state = cma_exch(id_priv, CMA_DESTROYING);
898 cma_cancel_operation(id_priv, state);
901 if (id_priv->cma_dev) {
903 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
904 case RDMA_TRANSPORT_IB:
905 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
906 ib_destroy_cm_id(id_priv->cm_id.ib);
908 case RDMA_TRANSPORT_IWARP:
909 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
910 iw_destroy_cm_id(id_priv->cm_id.iw);
915 cma_leave_mc_groups(id_priv);
917 cma_detach_from_dev(id_priv);
921 cma_release_port(id_priv);
922 cma_deref_id(id_priv);
923 wait_for_completion(&id_priv->comp);
925 if (id_priv->internal_id)
926 cma_deref_id(id_priv->id.context);
928 kfree(id_priv->id.route.path_rec);
931 EXPORT_SYMBOL(rdma_destroy_id);
933 static int cma_rep_recv(struct rdma_id_private *id_priv)
937 ret = cma_modify_qp_rtr(id_priv, NULL);
941 ret = cma_modify_qp_rts(id_priv, NULL);
945 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
951 cma_modify_qp_err(id_priv);
952 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
957 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
959 if (id_priv->id.ps == RDMA_PS_SDP &&
960 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
967 static void cma_set_rep_event_data(struct rdma_cm_event *event,
968 struct ib_cm_rep_event_param *rep_data,
971 event->param.conn.private_data = private_data;
972 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
973 event->param.conn.responder_resources = rep_data->responder_resources;
974 event->param.conn.initiator_depth = rep_data->initiator_depth;
975 event->param.conn.flow_control = rep_data->flow_control;
976 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
977 event->param.conn.srq = rep_data->srq;
978 event->param.conn.qp_num = rep_data->remote_qpn;
981 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
983 struct rdma_id_private *id_priv = cm_id->context;
984 struct rdma_cm_event event;
987 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
988 cma_disable_callback(id_priv, CMA_CONNECT)) ||
989 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
990 cma_disable_callback(id_priv, CMA_DISCONNECT)))
993 memset(&event, 0, sizeof event);
994 switch (ib_event->event) {
995 case IB_CM_REQ_ERROR:
996 case IB_CM_REP_ERROR:
997 event.event = RDMA_CM_EVENT_UNREACHABLE;
998 event.status = -ETIMEDOUT;
1000 case IB_CM_REP_RECEIVED:
1001 event.status = cma_verify_rep(id_priv, ib_event->private_data);
1003 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1004 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
1005 event.status = cma_rep_recv(id_priv);
1006 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1007 RDMA_CM_EVENT_ESTABLISHED;
1009 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1010 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1011 ib_event->private_data);
1013 case IB_CM_RTU_RECEIVED:
1014 case IB_CM_USER_ESTABLISHED:
1015 event.event = RDMA_CM_EVENT_ESTABLISHED;
1017 case IB_CM_DREQ_ERROR:
1018 event.status = -ETIMEDOUT; /* fall through */
1019 case IB_CM_DREQ_RECEIVED:
1020 case IB_CM_DREP_RECEIVED:
1021 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
1023 event.event = RDMA_CM_EVENT_DISCONNECTED;
1025 case IB_CM_TIMEWAIT_EXIT:
1026 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1028 case IB_CM_MRA_RECEIVED:
1031 case IB_CM_REJ_RECEIVED:
1032 cma_modify_qp_err(id_priv);
1033 event.status = ib_event->param.rej_rcvd.reason;
1034 event.event = RDMA_CM_EVENT_REJECTED;
1035 event.param.conn.private_data = ib_event->private_data;
1036 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1039 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1044 ret = id_priv->id.event_handler(&id_priv->id, &event);
1046 /* Destroy the CM ID by returning a non-zero value. */
1047 id_priv->cm_id.ib = NULL;
1048 cma_exch(id_priv, CMA_DESTROYING);
1049 mutex_unlock(&id_priv->handler_mutex);
1050 rdma_destroy_id(&id_priv->id);
1054 mutex_unlock(&id_priv->handler_mutex);
1058 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1059 struct ib_cm_event *ib_event)
1061 struct rdma_id_private *id_priv;
1062 struct rdma_cm_id *id;
1063 struct rdma_route *rt;
1064 union cma_ip_addr *src, *dst;
1069 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1070 &ip_ver, &port, &src, &dst))
1073 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1078 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1079 ip_ver, port, src, dst);
1082 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1083 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1088 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1089 if (rt->num_paths == 2)
1090 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1092 if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
1093 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1094 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1095 ib_addr_set_pkey(&rt->addr.dev_addr, rt->path_rec[0].pkey);
1097 ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
1098 &rt->addr.dev_addr);
1102 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1104 id_priv = container_of(id, struct rdma_id_private, id);
1105 id_priv->state = CMA_CONNECT;
1109 rdma_destroy_id(id);
1114 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1115 struct ib_cm_event *ib_event)
1117 struct rdma_id_private *id_priv;
1118 struct rdma_cm_id *id;
1119 union cma_ip_addr *src, *dst;
1124 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1130 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1131 &ip_ver, &port, &src, &dst))
1134 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1135 ip_ver, port, src, dst);
1137 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1138 ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
1139 &id->route.addr.dev_addr);
1144 id_priv = container_of(id, struct rdma_id_private, id);
1145 id_priv->state = CMA_CONNECT;
1148 rdma_destroy_id(id);
1152 static void cma_set_req_event_data(struct rdma_cm_event *event,
1153 struct ib_cm_req_event_param *req_data,
1154 void *private_data, int offset)
1156 event->param.conn.private_data = private_data + offset;
1157 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1158 event->param.conn.responder_resources = req_data->responder_resources;
1159 event->param.conn.initiator_depth = req_data->initiator_depth;
1160 event->param.conn.flow_control = req_data->flow_control;
1161 event->param.conn.retry_count = req_data->retry_count;
1162 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1163 event->param.conn.srq = req_data->srq;
1164 event->param.conn.qp_num = req_data->remote_qpn;
1167 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1169 struct rdma_id_private *listen_id, *conn_id;
1170 struct rdma_cm_event event;
1173 listen_id = cm_id->context;
1174 if (cma_disable_callback(listen_id, CMA_LISTEN))
1175 return -ECONNABORTED;
1177 memset(&event, 0, sizeof event);
1178 offset = cma_user_data_offset(listen_id->id.ps);
1179 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1180 if (cma_is_ud_ps(listen_id->id.ps)) {
1181 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1182 event.param.ud.private_data = ib_event->private_data + offset;
1183 event.param.ud.private_data_len =
1184 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1186 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1187 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1188 ib_event->private_data, offset);
1195 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1197 ret = cma_acquire_dev(conn_id);
1198 mutex_unlock(&lock);
1200 goto release_conn_id;
1202 conn_id->cm_id.ib = cm_id;
1203 cm_id->context = conn_id;
1204 cm_id->cm_handler = cma_ib_handler;
1206 ret = conn_id->id.event_handler(&conn_id->id, &event);
1209 * Acquire mutex to prevent user executing rdma_destroy_id()
1210 * while we're accessing the cm_id.
1213 if (cma_comp(conn_id, CMA_CONNECT) &&
1214 !cma_is_ud_ps(conn_id->id.ps))
1215 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1216 mutex_unlock(&lock);
1217 mutex_unlock(&conn_id->handler_mutex);
1221 /* Destroy the CM ID by returning a non-zero value. */
1222 conn_id->cm_id.ib = NULL;
1225 cma_exch(conn_id, CMA_DESTROYING);
1226 mutex_unlock(&conn_id->handler_mutex);
1227 rdma_destroy_id(&conn_id->id);
1230 mutex_unlock(&listen_id->handler_mutex);
1234 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1236 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1239 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1240 struct ib_cm_compare_data *compare)
1242 struct cma_hdr *cma_data, *cma_mask;
1243 struct sdp_hh *sdp_data, *sdp_mask;
1245 struct in6_addr ip6_addr;
1247 memset(compare, 0, sizeof *compare);
1248 cma_data = (void *) compare->data;
1249 cma_mask = (void *) compare->mask;
1250 sdp_data = (void *) compare->data;
1251 sdp_mask = (void *) compare->mask;
1253 switch (addr->sa_family) {
1255 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1256 if (ps == RDMA_PS_SDP) {
1257 sdp_set_ip_ver(sdp_data, 4);
1258 sdp_set_ip_ver(sdp_mask, 0xF);
1259 sdp_data->dst_addr.ip4.addr = ip4_addr;
1260 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1262 cma_set_ip_ver(cma_data, 4);
1263 cma_set_ip_ver(cma_mask, 0xF);
1264 cma_data->dst_addr.ip4.addr = ip4_addr;
1265 cma_mask->dst_addr.ip4.addr = htonl(~0);
1270 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1271 if (ps == RDMA_PS_SDP) {
1272 sdp_set_ip_ver(sdp_data, 6);
1273 sdp_set_ip_ver(sdp_mask, 0xF);
1274 sdp_data->dst_addr.ip6 = ip6_addr;
1275 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1276 sizeof sdp_mask->dst_addr.ip6);
1278 cma_set_ip_ver(cma_data, 6);
1279 cma_set_ip_ver(cma_mask, 0xF);
1280 cma_data->dst_addr.ip6 = ip6_addr;
1281 memset(&cma_mask->dst_addr.ip6, 0xFF,
1282 sizeof cma_mask->dst_addr.ip6);
1291 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1293 struct rdma_id_private *id_priv = iw_id->context;
1294 struct rdma_cm_event event;
1295 struct sockaddr_in *sin;
1298 if (cma_disable_callback(id_priv, CMA_CONNECT))
1301 memset(&event, 0, sizeof event);
1302 switch (iw_event->event) {
1303 case IW_CM_EVENT_CLOSE:
1304 event.event = RDMA_CM_EVENT_DISCONNECTED;
1306 case IW_CM_EVENT_CONNECT_REPLY:
1307 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1308 *sin = iw_event->local_addr;
1309 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1310 *sin = iw_event->remote_addr;
1311 switch (iw_event->status) {
1313 event.event = RDMA_CM_EVENT_ESTABLISHED;
1317 event.event = RDMA_CM_EVENT_REJECTED;
1320 event.event = RDMA_CM_EVENT_UNREACHABLE;
1323 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1327 case IW_CM_EVENT_ESTABLISHED:
1328 event.event = RDMA_CM_EVENT_ESTABLISHED;
1334 event.status = iw_event->status;
1335 event.param.conn.private_data = iw_event->private_data;
1336 event.param.conn.private_data_len = iw_event->private_data_len;
1337 ret = id_priv->id.event_handler(&id_priv->id, &event);
1339 /* Destroy the CM ID by returning a non-zero value. */
1340 id_priv->cm_id.iw = NULL;
1341 cma_exch(id_priv, CMA_DESTROYING);
1342 mutex_unlock(&id_priv->handler_mutex);
1343 rdma_destroy_id(&id_priv->id);
1347 mutex_unlock(&id_priv->handler_mutex);
1351 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1352 struct iw_cm_event *iw_event)
1354 struct rdma_cm_id *new_cm_id;
1355 struct rdma_id_private *listen_id, *conn_id;
1356 struct sockaddr_in *sin;
1357 struct net_device *dev = NULL;
1358 struct rdma_cm_event event;
1360 struct ib_device_attr attr;
1362 listen_id = cm_id->context;
1363 if (cma_disable_callback(listen_id, CMA_LISTEN))
1364 return -ECONNABORTED;
1366 /* Create a new RDMA id for the new IW CM ID */
1367 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1368 listen_id->id.context,
1370 if (IS_ERR(new_cm_id)) {
1374 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1375 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1376 conn_id->state = CMA_CONNECT;
1378 dev = ip_dev_find(NULL, iw_event->local_addr.sin_addr.s_addr);
1380 ret = -EADDRNOTAVAIL;
1381 mutex_unlock(&conn_id->handler_mutex);
1382 rdma_destroy_id(new_cm_id);
1385 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1387 mutex_unlock(&conn_id->handler_mutex);
1388 rdma_destroy_id(new_cm_id);
1393 ret = cma_acquire_dev(conn_id);
1394 mutex_unlock(&lock);
1396 mutex_unlock(&conn_id->handler_mutex);
1397 rdma_destroy_id(new_cm_id);
1401 conn_id->cm_id.iw = cm_id;
1402 cm_id->context = conn_id;
1403 cm_id->cm_handler = cma_iw_handler;
1405 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1406 *sin = iw_event->local_addr;
1407 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1408 *sin = iw_event->remote_addr;
1410 ret = ib_query_device(conn_id->id.device, &attr);
1412 mutex_unlock(&conn_id->handler_mutex);
1413 rdma_destroy_id(new_cm_id);
1417 memset(&event, 0, sizeof event);
1418 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1419 event.param.conn.private_data = iw_event->private_data;
1420 event.param.conn.private_data_len = iw_event->private_data_len;
1421 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1422 event.param.conn.responder_resources = attr.max_qp_rd_atom;
1423 ret = conn_id->id.event_handler(&conn_id->id, &event);
1425 /* User wants to destroy the CM ID */
1426 conn_id->cm_id.iw = NULL;
1427 cma_exch(conn_id, CMA_DESTROYING);
1428 mutex_unlock(&conn_id->handler_mutex);
1429 rdma_destroy_id(&conn_id->id);
1433 mutex_unlock(&conn_id->handler_mutex);
1438 mutex_unlock(&listen_id->handler_mutex);
1442 static int cma_ib_listen(struct rdma_id_private *id_priv)
1444 struct ib_cm_compare_data compare_data;
1445 struct sockaddr *addr;
1449 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1451 if (IS_ERR(id_priv->cm_id.ib))
1452 return PTR_ERR(id_priv->cm_id.ib);
1454 addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
1455 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1456 if (cma_any_addr(addr))
1457 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1459 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1460 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1464 ib_destroy_cm_id(id_priv->cm_id.ib);
1465 id_priv->cm_id.ib = NULL;
1471 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1474 struct sockaddr_in *sin;
1476 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1477 iw_conn_req_handler,
1479 if (IS_ERR(id_priv->cm_id.iw))
1480 return PTR_ERR(id_priv->cm_id.iw);
1482 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1483 id_priv->cm_id.iw->local_addr = *sin;
1485 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1488 iw_destroy_cm_id(id_priv->cm_id.iw);
1489 id_priv->cm_id.iw = NULL;
1495 static int cma_listen_handler(struct rdma_cm_id *id,
1496 struct rdma_cm_event *event)
1498 struct rdma_id_private *id_priv = id->context;
1500 id->context = id_priv->id.context;
1501 id->event_handler = id_priv->id.event_handler;
1502 return id_priv->id.event_handler(id, event);
1505 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1506 struct cma_device *cma_dev)
1508 struct rdma_id_private *dev_id_priv;
1509 struct rdma_cm_id *id;
1512 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1516 dev_id_priv = container_of(id, struct rdma_id_private, id);
1518 dev_id_priv->state = CMA_ADDR_BOUND;
1519 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1520 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
1522 cma_attach_to_dev(dev_id_priv, cma_dev);
1523 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1524 atomic_inc(&id_priv->refcount);
1525 dev_id_priv->internal_id = 1;
1527 ret = rdma_listen(id, id_priv->backlog);
1529 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1530 "listening on device %s\n", ret, cma_dev->device->name);
1533 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1535 struct cma_device *cma_dev;
1538 list_add_tail(&id_priv->list, &listen_any_list);
1539 list_for_each_entry(cma_dev, &dev_list, list)
1540 cma_listen_on_dev(id_priv, cma_dev);
1541 mutex_unlock(&lock);
1544 int rdma_listen(struct rdma_cm_id *id, int backlog)
1546 struct rdma_id_private *id_priv;
1549 id_priv = container_of(id, struct rdma_id_private, id);
1550 if (id_priv->state == CMA_IDLE) {
1551 ((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
1552 ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
1557 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1560 id_priv->backlog = backlog;
1562 switch (rdma_node_get_transport(id->device->node_type)) {
1563 case RDMA_TRANSPORT_IB:
1564 ret = cma_ib_listen(id_priv);
1568 case RDMA_TRANSPORT_IWARP:
1569 ret = cma_iw_listen(id_priv, backlog);
1578 cma_listen_on_all(id_priv);
1582 id_priv->backlog = 0;
1583 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1586 EXPORT_SYMBOL(rdma_listen);
1588 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1590 struct rdma_id_private *id_priv;
1592 id_priv = container_of(id, struct rdma_id_private, id);
1593 id_priv->tos = (u8) tos;
1595 EXPORT_SYMBOL(rdma_set_service_type);
1597 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1600 struct cma_work *work = context;
1601 struct rdma_route *route;
1603 route = &work->id->id.route;
1606 route->num_paths = 1;
1607 *route->path_rec = *path_rec;
1609 work->old_state = CMA_ROUTE_QUERY;
1610 work->new_state = CMA_ADDR_RESOLVED;
1611 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1612 work->event.status = status;
1615 queue_work(cma_wq, &work->work);
1618 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1619 struct cma_work *work)
1621 struct rdma_addr *addr = &id_priv->id.route.addr;
1622 struct ib_sa_path_rec path_rec;
1623 ib_sa_comp_mask comp_mask;
1624 struct sockaddr_in6 *sin6;
1626 memset(&path_rec, 0, sizeof path_rec);
1627 rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1628 rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1629 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1630 path_rec.numb_path = 1;
1631 path_rec.reversible = 1;
1632 path_rec.service_id = cma_get_service_id(id_priv->id.ps,
1633 (struct sockaddr *) &addr->dst_addr);
1635 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1636 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1637 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1639 if (addr->src_addr.ss_family == AF_INET) {
1640 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1641 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1643 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1644 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1645 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1649 path_rec.mtu_selector = IB_SA_LT;
1650 path_rec.mtu = IB_MTU_2048;
1653 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1654 id_priv->id.port_num, &path_rec,
1655 comp_mask, timeout_ms,
1656 GFP_KERNEL, cma_query_handler,
1657 work, &id_priv->query);
1659 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1662 static void cma_work_handler(struct work_struct *_work)
1664 struct cma_work *work = container_of(_work, struct cma_work, work);
1665 struct rdma_id_private *id_priv = work->id;
1668 mutex_lock(&id_priv->handler_mutex);
1669 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1672 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1673 cma_exch(id_priv, CMA_DESTROYING);
1677 mutex_unlock(&id_priv->handler_mutex);
1678 cma_deref_id(id_priv);
1680 rdma_destroy_id(&id_priv->id);
1684 static void cma_ndev_work_handler(struct work_struct *_work)
1686 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1687 struct rdma_id_private *id_priv = work->id;
1690 mutex_lock(&id_priv->handler_mutex);
1691 if (id_priv->state == CMA_DESTROYING ||
1692 id_priv->state == CMA_DEVICE_REMOVAL)
1695 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1696 cma_exch(id_priv, CMA_DESTROYING);
1701 mutex_unlock(&id_priv->handler_mutex);
1702 cma_deref_id(id_priv);
1704 rdma_destroy_id(&id_priv->id);
1708 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1710 struct rdma_route *route = &id_priv->id.route;
1711 struct cma_work *work;
1714 work = kzalloc(sizeof *work, GFP_KERNEL);
1719 INIT_WORK(&work->work, cma_work_handler);
1720 work->old_state = CMA_ROUTE_QUERY;
1721 work->new_state = CMA_ROUTE_RESOLVED;
1722 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1724 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1725 if (!route->path_rec) {
1730 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1736 kfree(route->path_rec);
1737 route->path_rec = NULL;
1743 int rdma_set_ib_paths(struct rdma_cm_id *id,
1744 struct ib_sa_path_rec *path_rec, int num_paths)
1746 struct rdma_id_private *id_priv;
1749 id_priv = container_of(id, struct rdma_id_private, id);
1750 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1753 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1754 if (!id->route.path_rec) {
1759 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1762 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1765 EXPORT_SYMBOL(rdma_set_ib_paths);
1767 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1769 struct cma_work *work;
1771 work = kzalloc(sizeof *work, GFP_KERNEL);
1776 INIT_WORK(&work->work, cma_work_handler);
1777 work->old_state = CMA_ROUTE_QUERY;
1778 work->new_state = CMA_ROUTE_RESOLVED;
1779 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1780 queue_work(cma_wq, &work->work);
1784 static u8 tos_to_sl(u8 tos)
1786 return def_prec2sl & 7;
1789 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1791 struct rdma_route *route = &id_priv->id.route;
1792 struct rdma_addr *addr = &route->addr;
1793 struct cma_work *work;
1795 struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
1796 struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
1797 struct net_device *ndev = NULL;
1800 if (src_addr->sin_family != dst_addr->sin_family)
1803 work = kzalloc(sizeof *work, GFP_KERNEL);
1808 INIT_WORK(&work->work, cma_work_handler);
1810 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1811 if (!route->path_rec) {
1816 route->num_paths = 1;
1818 if (addr->dev_addr.bound_dev_if)
1819 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1825 vid = rdma_vlan_dev_vlan_id(ndev);
1827 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1828 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1830 route->path_rec->hop_limit = 1;
1831 route->path_rec->reversible = 1;
1832 route->path_rec->pkey = cpu_to_be16(0xffff);
1833 route->path_rec->mtu_selector = IB_SA_EQ;
1834 route->path_rec->sl = tos_to_sl(id_priv->tos);
1837 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1839 route->path_rec->mtu = iboe_get_mtu(ndev->if_mtu);
1841 route->path_rec->rate_selector = IB_SA_EQ;
1842 route->path_rec->rate = iboe_get_rate(ndev);
1844 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1845 route->path_rec->packet_life_time = IBOE_PACKET_LIFETIME;
1846 if (!route->path_rec->mtu) {
1851 work->old_state = CMA_ROUTE_QUERY;
1852 work->new_state = CMA_ROUTE_RESOLVED;
1853 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1854 work->event.status = 0;
1856 queue_work(cma_wq, &work->work);
1861 kfree(route->path_rec);
1862 route->path_rec = NULL;
1868 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1870 struct rdma_id_private *id_priv;
1873 id_priv = container_of(id, struct rdma_id_private, id);
1874 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1877 atomic_inc(&id_priv->refcount);
1878 switch (rdma_node_get_transport(id->device->node_type)) {
1879 case RDMA_TRANSPORT_IB:
1880 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1881 case IB_LINK_LAYER_INFINIBAND:
1882 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1884 case IB_LINK_LAYER_ETHERNET:
1885 ret = cma_resolve_iboe_route(id_priv);
1891 case RDMA_TRANSPORT_IWARP:
1892 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1903 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1904 cma_deref_id(id_priv);
1907 EXPORT_SYMBOL(rdma_resolve_route);
1909 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1911 struct cma_device *cma_dev;
1912 struct ib_port_attr port_attr;
1919 if (list_empty(&dev_list)) {
1923 list_for_each_entry(cma_dev, &dev_list, list)
1924 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1925 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1926 port_attr.state == IB_PORT_ACTIVE)
1930 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1933 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1937 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1941 id_priv->id.route.addr.dev_addr.dev_type =
1942 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
1943 ARPHRD_INFINIBAND : ARPHRD_ETHER;
1945 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1946 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1947 id_priv->id.port_num = p;
1948 cma_attach_to_dev(id_priv, cma_dev);
1950 mutex_unlock(&lock);
1954 static void addr_handler(int status, struct sockaddr *src_addr,
1955 struct rdma_dev_addr *dev_addr, void *context)
1957 struct rdma_id_private *id_priv = context;
1958 struct rdma_cm_event event;
1960 memset(&event, 0, sizeof event);
1961 mutex_lock(&id_priv->handler_mutex);
1964 * Grab mutex to block rdma_destroy_id() from removing the device while
1965 * we're trying to acquire it.
1968 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1969 mutex_unlock(&lock);
1973 if (!status && !id_priv->cma_dev)
1974 status = cma_acquire_dev(id_priv);
1975 mutex_unlock(&lock);
1978 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
1980 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1981 event.status = status;
1983 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1984 ip_addr_size(src_addr));
1985 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1988 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1989 cma_exch(id_priv, CMA_DESTROYING);
1990 mutex_unlock(&id_priv->handler_mutex);
1991 cma_deref_id(id_priv);
1992 rdma_destroy_id(&id_priv->id);
1996 mutex_unlock(&id_priv->handler_mutex);
1997 cma_deref_id(id_priv);
2000 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2002 struct cma_work *work;
2003 struct sockaddr *src, *dst;
2007 work = kzalloc(sizeof *work, GFP_KERNEL);
2011 if (!id_priv->cma_dev) {
2012 ret = cma_bind_loopback(id_priv);
2017 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2018 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2020 src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
2021 if (cma_zero_addr(src)) {
2022 dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
2023 if ((src->sa_family = dst->sa_family) == AF_INET) {
2024 ((struct sockaddr_in *) src)->sin_addr.s_addr =
2025 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
2027 ipv6_addr_copy(&((struct sockaddr_in6 *) src)->sin6_addr,
2028 &((struct sockaddr_in6 *) dst)->sin6_addr);
2033 INIT_WORK(&work->work, cma_work_handler);
2034 work->old_state = CMA_ADDR_QUERY;
2035 work->new_state = CMA_ADDR_RESOLVED;
2036 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2037 queue_work(cma_wq, &work->work);
2044 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2045 struct sockaddr *dst_addr)
2047 if (!src_addr || !src_addr->sa_family) {
2048 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2049 if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
2050 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2051 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2054 return rdma_bind_addr(id, src_addr);
2057 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2058 struct sockaddr *dst_addr, int timeout_ms)
2060 struct rdma_id_private *id_priv;
2063 id_priv = container_of(id, struct rdma_id_private, id);
2064 if (id_priv->state == CMA_IDLE) {
2065 ret = cma_bind_addr(id, src_addr, dst_addr);
2070 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
2073 atomic_inc(&id_priv->refcount);
2074 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
2075 if (cma_any_addr(dst_addr))
2076 ret = cma_resolve_loopback(id_priv);
2078 ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
2079 dst_addr, &id->route.addr.dev_addr,
2080 timeout_ms, addr_handler, id_priv);
2086 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
2087 cma_deref_id(id_priv);
2090 EXPORT_SYMBOL(rdma_resolve_addr);
2092 static void cma_bind_port(struct rdma_bind_list *bind_list,
2093 struct rdma_id_private *id_priv)
2095 struct sockaddr_in *sin;
2097 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2098 sin->sin_port = htons(bind_list->port);
2099 id_priv->bind_list = bind_list;
2100 hlist_add_head(&id_priv->node, &bind_list->owners);
2103 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2104 unsigned short snum)
2106 struct rdma_bind_list *bind_list;
2109 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2114 ret = idr_get_new_above(ps, bind_list, snum, &port);
2115 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2121 ret = -EADDRNOTAVAIL;
2126 bind_list->port = (unsigned short) port;
2127 cma_bind_port(bind_list, id_priv);
2130 idr_remove(ps, port);
2136 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2138 struct rdma_bind_list *bind_list;
2139 int port, ret, low, high;
2141 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2146 /* FIXME: add proper port randomization per like inet_csk_get_port */
2148 ret = idr_get_new_above(ps, bind_list, next_port, &port);
2149 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
2154 inet_get_local_port_range(&low, &high);
2156 if (next_port != low) {
2157 idr_remove(ps, port);
2161 ret = -EADDRNOTAVAIL;
2168 next_port = port + 1;
2171 bind_list->port = (unsigned short) port;
2172 cma_bind_port(bind_list, id_priv);
2175 idr_remove(ps, port);
2181 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2183 struct rdma_id_private *cur_id;
2184 struct sockaddr_in *sin, *cur_sin;
2185 struct rdma_bind_list *bind_list;
2186 struct hlist_node *node;
2187 unsigned short snum;
2189 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
2190 snum = ntohs(sin->sin_port);
2192 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2196 bind_list = idr_find(ps, snum);
2198 return cma_alloc_port(ps, id_priv, snum);
2201 * We don't support binding to any address if anyone is bound to
2202 * a specific address on the same port.
2204 if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2205 return -EADDRNOTAVAIL;
2207 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2208 if (cma_any_addr((struct sockaddr *) &cur_id->id.route.addr.src_addr))
2209 return -EADDRNOTAVAIL;
2211 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
2212 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2216 cma_bind_port(bind_list, id_priv);
2220 static int cma_get_tcp_port(struct rdma_id_private *id_priv)
2224 struct socket *sock;
2226 ret = sock_create_kern(AF_INET, SOCK_STREAM, IPPROTO_TCP, &sock);
2230 ret = sock->ops->bind(sock,
2231 (struct sockaddr *) &id_priv->id.route.addr.src_addr,
2232 ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
2235 (struct sockaddr *)&id_priv->id.route.addr.src_addr,
2242 size = ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr);
2243 ret = sock_getname(sock,
2244 (struct sockaddr *) &id_priv->id.route.addr.src_addr,
2250 id_priv->sock = sock;
2254 static int cma_get_port(struct rdma_id_private *id_priv)
2259 switch (id_priv->id.ps) {
2265 if (unify_tcp_port_space) {
2266 ret = cma_get_tcp_port(id_priv);
2278 return -EPROTONOSUPPORT;
2282 if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
2283 ret = cma_alloc_any_port(ps, id_priv);
2285 ret = cma_use_port(ps, id_priv);
2286 mutex_unlock(&lock);
2291 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2292 struct sockaddr *addr)
2295 struct sockaddr_in6 *sin6;
2297 if (addr->sa_family != AF_INET6)
2300 sin6 = (struct sockaddr_in6 *) addr;
2302 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2304 if (IN6_IS_SCOPE_LINKLOCAL(&sin6->sin6_addr) &&
2306 !sin6->sin6_scope_id)
2309 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2314 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2316 struct rdma_id_private *id_priv;
2319 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
2320 return -EAFNOSUPPORT;
2322 id_priv = container_of(id, struct rdma_id_private, id);
2323 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2326 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2330 if (!cma_any_addr(addr)) {
2331 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2336 ret = cma_acquire_dev(id_priv);
2337 mutex_unlock(&lock);
2342 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2343 ret = cma_get_port(id_priv);
2349 if (id_priv->cma_dev) {
2351 cma_detach_from_dev(id_priv);
2352 mutex_unlock(&lock);
2355 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2358 EXPORT_SYMBOL(rdma_bind_addr);
2360 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2361 struct rdma_route *route)
2363 struct cma_hdr *cma_hdr;
2364 struct sdp_hh *sdp_hdr;
2366 if (route->addr.src_addr.ss_family == AF_INET) {
2367 struct sockaddr_in *src4, *dst4;
2369 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2370 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2375 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2377 sdp_set_ip_ver(sdp_hdr, 4);
2378 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2379 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2380 sdp_hdr->port = src4->sin_port;
2384 cma_hdr->cma_version = CMA_VERSION;
2385 cma_set_ip_ver(cma_hdr, 4);
2386 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2387 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2388 cma_hdr->port = src4->sin_port;
2392 struct sockaddr_in6 *src6, *dst6;
2394 src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
2395 dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
2400 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2402 sdp_set_ip_ver(sdp_hdr, 6);
2403 sdp_hdr->src_addr.ip6 = src6->sin6_addr;
2404 sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
2405 sdp_hdr->port = src6->sin6_port;
2409 cma_hdr->cma_version = CMA_VERSION;
2410 cma_set_ip_ver(cma_hdr, 6);
2411 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2412 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2413 cma_hdr->port = src6->sin6_port;
2420 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2421 struct ib_cm_event *ib_event)
2423 struct rdma_id_private *id_priv = cm_id->context;
2424 struct rdma_cm_event event;
2425 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2428 if (cma_disable_callback(id_priv, CMA_CONNECT))
2431 memset(&event, 0, sizeof event);
2432 switch (ib_event->event) {
2433 case IB_CM_SIDR_REQ_ERROR:
2434 event.event = RDMA_CM_EVENT_UNREACHABLE;
2435 event.status = -ETIMEDOUT;
2437 case IB_CM_SIDR_REP_RECEIVED:
2438 event.param.ud.private_data = ib_event->private_data;
2439 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2440 if (rep->status != IB_SIDR_SUCCESS) {
2441 event.event = RDMA_CM_EVENT_UNREACHABLE;
2442 event.status = ib_event->param.sidr_rep_rcvd.status;
2445 ret = cma_set_qkey(id_priv);
2447 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2448 event.status = -EINVAL;
2451 if (id_priv->qkey != rep->qkey) {
2452 event.event = RDMA_CM_EVENT_UNREACHABLE;
2453 event.status = -EINVAL;
2456 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2457 id_priv->id.route.path_rec,
2458 &event.param.ud.ah_attr);
2459 event.param.ud.qp_num = rep->qpn;
2460 event.param.ud.qkey = rep->qkey;
2461 event.event = RDMA_CM_EVENT_ESTABLISHED;
2465 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2470 ret = id_priv->id.event_handler(&id_priv->id, &event);
2472 /* Destroy the CM ID by returning a non-zero value. */
2473 id_priv->cm_id.ib = NULL;
2474 cma_exch(id_priv, CMA_DESTROYING);
2475 mutex_unlock(&id_priv->handler_mutex);
2476 rdma_destroy_id(&id_priv->id);
2480 mutex_unlock(&id_priv->handler_mutex);
2484 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2485 struct rdma_conn_param *conn_param)
2487 struct ib_cm_sidr_req_param req;
2488 struct rdma_route *route;
2491 req.private_data_len = sizeof(struct cma_hdr) +
2492 conn_param->private_data_len;
2493 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2494 if (!req.private_data)
2497 if (conn_param->private_data && conn_param->private_data_len)
2498 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2499 conn_param->private_data, conn_param->private_data_len);
2501 route = &id_priv->id.route;
2502 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2506 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2507 cma_sidr_rep_handler, id_priv);
2508 if (IS_ERR(id_priv->cm_id.ib)) {
2509 ret = PTR_ERR(id_priv->cm_id.ib);
2513 req.path = route->path_rec;
2514 req.service_id = cma_get_service_id(id_priv->id.ps,
2515 (struct sockaddr *) &route->addr.dst_addr);
2516 req.timeout_ms = 1 << (cma_response_timeout - 8);
2517 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2519 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2521 ib_destroy_cm_id(id_priv->cm_id.ib);
2522 id_priv->cm_id.ib = NULL;
2525 kfree(req.private_data);
2529 static int cma_connect_ib(struct rdma_id_private *id_priv,
2530 struct rdma_conn_param *conn_param)
2532 struct ib_cm_req_param req;
2533 struct rdma_route *route;
2537 memset(&req, 0, sizeof req);
2538 offset = cma_user_data_offset(id_priv->id.ps);
2539 req.private_data_len = offset + conn_param->private_data_len;
2540 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2544 if (conn_param->private_data && conn_param->private_data_len)
2545 memcpy(private_data + offset, conn_param->private_data,
2546 conn_param->private_data_len);
2548 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2550 if (IS_ERR(id_priv->cm_id.ib)) {
2551 ret = PTR_ERR(id_priv->cm_id.ib);
2555 route = &id_priv->id.route;
2556 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2559 req.private_data = private_data;
2561 req.primary_path = &route->path_rec[0];
2562 if (route->num_paths == 2)
2563 req.alternate_path = &route->path_rec[1];
2565 req.service_id = cma_get_service_id(id_priv->id.ps,
2566 (struct sockaddr *) &route->addr.dst_addr);
2567 req.qp_num = id_priv->qp_num;
2568 req.qp_type = IB_QPT_RC;
2569 req.starting_psn = id_priv->seq_num;
2570 req.responder_resources = conn_param->responder_resources;
2571 req.initiator_depth = conn_param->initiator_depth;
2572 req.flow_control = conn_param->flow_control;
2573 req.retry_count = conn_param->retry_count;
2574 req.rnr_retry_count = conn_param->rnr_retry_count;
2575 req.remote_cm_response_timeout = cma_response_timeout;
2576 req.local_cm_response_timeout = cma_response_timeout;
2577 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2578 req.srq = id_priv->srq ? 1 : 0;
2580 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2582 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2583 ib_destroy_cm_id(id_priv->cm_id.ib);
2584 id_priv->cm_id.ib = NULL;
2587 kfree(private_data);
2591 static int cma_connect_iw(struct rdma_id_private *id_priv,
2592 struct rdma_conn_param *conn_param)
2594 struct iw_cm_id *cm_id;
2595 struct sockaddr_in* sin;
2597 struct iw_cm_conn_param iw_param;
2599 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2600 if (IS_ERR(cm_id)) {
2601 ret = PTR_ERR(cm_id);
2605 id_priv->cm_id.iw = cm_id;
2607 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2608 cm_id->local_addr = *sin;
2610 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2611 cm_id->remote_addr = *sin;
2613 ret = cma_modify_qp_rtr(id_priv, conn_param);
2617 iw_param.ord = conn_param->initiator_depth;
2618 iw_param.ird = conn_param->responder_resources;
2619 iw_param.private_data = conn_param->private_data;
2620 iw_param.private_data_len = conn_param->private_data_len;
2622 iw_param.qpn = id_priv->qp_num;
2624 iw_param.qpn = conn_param->qp_num;
2625 ret = iw_cm_connect(cm_id, &iw_param);
2627 if (ret && !IS_ERR(cm_id)) {
2628 iw_destroy_cm_id(cm_id);
2629 id_priv->cm_id.iw = NULL;
2634 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2636 struct rdma_id_private *id_priv;
2639 id_priv = container_of(id, struct rdma_id_private, id);
2640 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2644 id_priv->qp_num = conn_param->qp_num;
2645 id_priv->srq = conn_param->srq;
2648 switch (rdma_node_get_transport(id->device->node_type)) {
2649 case RDMA_TRANSPORT_IB:
2650 if (cma_is_ud_ps(id->ps))
2651 ret = cma_resolve_ib_udp(id_priv, conn_param);
2653 ret = cma_connect_ib(id_priv, conn_param);
2655 case RDMA_TRANSPORT_IWARP:
2656 ret = cma_connect_iw(id_priv, conn_param);
2667 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2670 EXPORT_SYMBOL(rdma_connect);
2672 static int cma_accept_ib(struct rdma_id_private *id_priv,
2673 struct rdma_conn_param *conn_param)
2675 struct ib_cm_rep_param rep;
2678 ret = cma_modify_qp_rtr(id_priv, conn_param);
2682 ret = cma_modify_qp_rts(id_priv, conn_param);
2686 memset(&rep, 0, sizeof rep);
2687 rep.qp_num = id_priv->qp_num;
2688 rep.starting_psn = id_priv->seq_num;
2689 rep.private_data = conn_param->private_data;
2690 rep.private_data_len = conn_param->private_data_len;
2691 rep.responder_resources = conn_param->responder_resources;
2692 rep.initiator_depth = conn_param->initiator_depth;
2693 rep.failover_accepted = 0;
2694 rep.flow_control = conn_param->flow_control;
2695 rep.rnr_retry_count = conn_param->rnr_retry_count;
2696 rep.srq = id_priv->srq ? 1 : 0;
2698 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2703 static int cma_accept_iw(struct rdma_id_private *id_priv,
2704 struct rdma_conn_param *conn_param)
2706 struct iw_cm_conn_param iw_param;
2709 ret = cma_modify_qp_rtr(id_priv, conn_param);
2713 iw_param.ord = conn_param->initiator_depth;
2714 iw_param.ird = conn_param->responder_resources;
2715 iw_param.private_data = conn_param->private_data;
2716 iw_param.private_data_len = conn_param->private_data_len;
2717 if (id_priv->id.qp) {
2718 iw_param.qpn = id_priv->qp_num;
2720 iw_param.qpn = conn_param->qp_num;
2722 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2725 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2726 enum ib_cm_sidr_status status,
2727 const void *private_data, int private_data_len)
2729 struct ib_cm_sidr_rep_param rep;
2732 memset(&rep, 0, sizeof rep);
2733 rep.status = status;
2734 if (status == IB_SIDR_SUCCESS) {
2735 ret = cma_set_qkey(id_priv);
2738 rep.qp_num = id_priv->qp_num;
2739 rep.qkey = id_priv->qkey;
2741 rep.private_data = private_data;
2742 rep.private_data_len = private_data_len;
2744 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2747 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2749 struct rdma_id_private *id_priv;
2752 id_priv = container_of(id, struct rdma_id_private, id);
2753 if (!cma_comp(id_priv, CMA_CONNECT))
2756 if (!id->qp && conn_param) {
2757 id_priv->qp_num = conn_param->qp_num;
2758 id_priv->srq = conn_param->srq;
2761 switch (rdma_node_get_transport(id->device->node_type)) {
2762 case RDMA_TRANSPORT_IB:
2763 if (cma_is_ud_ps(id->ps))
2764 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2765 conn_param->private_data,
2766 conn_param->private_data_len);
2767 else if (conn_param)
2768 ret = cma_accept_ib(id_priv, conn_param);
2770 ret = cma_rep_recv(id_priv);
2772 case RDMA_TRANSPORT_IWARP:
2773 ret = cma_accept_iw(id_priv, conn_param);
2785 cma_modify_qp_err(id_priv);
2786 rdma_reject(id, NULL, 0);
2789 EXPORT_SYMBOL(rdma_accept);
2791 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2793 struct rdma_id_private *id_priv;
2796 id_priv = container_of(id, struct rdma_id_private, id);
2797 if (!cma_has_cm_dev(id_priv))
2800 switch (id->device->node_type) {
2801 case RDMA_NODE_IB_CA:
2802 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2810 EXPORT_SYMBOL(rdma_notify);
2812 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2813 u8 private_data_len)
2815 struct rdma_id_private *id_priv;
2818 id_priv = container_of(id, struct rdma_id_private, id);
2819 if (!cma_has_cm_dev(id_priv))
2822 switch (rdma_node_get_transport(id->device->node_type)) {
2823 case RDMA_TRANSPORT_IB:
2824 if (cma_is_ud_ps(id->ps))
2825 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2826 private_data, private_data_len);
2828 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2829 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2830 0, private_data, private_data_len);
2832 case RDMA_TRANSPORT_IWARP:
2833 ret = iw_cm_reject(id_priv->cm_id.iw,
2834 private_data, private_data_len);
2842 EXPORT_SYMBOL(rdma_reject);
2844 int rdma_disconnect(struct rdma_cm_id *id)
2846 struct rdma_id_private *id_priv;
2849 id_priv = container_of(id, struct rdma_id_private, id);
2850 if (!cma_has_cm_dev(id_priv))
2853 switch (rdma_node_get_transport(id->device->node_type)) {
2854 case RDMA_TRANSPORT_IB:
2855 ret = cma_modify_qp_err(id_priv);
2858 /* Initiate or respond to a disconnect. */
2859 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2860 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2862 case RDMA_TRANSPORT_IWARP:
2863 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2872 EXPORT_SYMBOL(rdma_disconnect);
2874 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2876 struct rdma_id_private *id_priv;
2877 struct cma_multicast *mc = multicast->context;
2878 struct rdma_cm_event event;
2881 id_priv = mc->id_priv;
2882 if (cma_disable_callback(id_priv, CMA_ADDR_BOUND) &&
2883 cma_disable_callback(id_priv, CMA_ADDR_RESOLVED))
2886 mutex_lock(&id_priv->qp_mutex);
2887 if (!status && id_priv->id.qp)
2888 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2889 multicast->rec.mlid);
2890 mutex_unlock(&id_priv->qp_mutex);
2892 memset(&event, 0, sizeof event);
2893 event.status = status;
2894 event.param.ud.private_data = mc->context;
2896 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2897 ib_init_ah_from_mcmember(id_priv->id.device,
2898 id_priv->id.port_num, &multicast->rec,
2899 &event.param.ud.ah_attr);
2900 event.param.ud.qp_num = 0xFFFFFF;
2901 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2903 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2905 ret = id_priv->id.event_handler(&id_priv->id, &event);
2907 cma_exch(id_priv, CMA_DESTROYING);
2908 mutex_unlock(&id_priv->handler_mutex);
2909 rdma_destroy_id(&id_priv->id);
2913 mutex_unlock(&id_priv->handler_mutex);
2917 static void cma_set_mgid(struct rdma_id_private *id_priv,
2918 struct sockaddr *addr, union ib_gid *mgid)
2920 unsigned char mc_map[MAX_ADDR_LEN];
2921 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2922 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2923 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2925 if (cma_any_addr(addr)) {
2926 memset(mgid, 0, sizeof *mgid);
2927 } else if ((addr->sa_family == AF_INET6) &&
2928 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
2930 /* IPv6 address is an SA assigned MGID. */
2931 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2932 } else if ((addr->sa_family == AF_INET6)) {
2933 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
2934 if (id_priv->id.ps == RDMA_PS_UDP)
2935 mc_map[7] = 0x01; /* Use RDMA CM signature */
2936 *mgid = *(union ib_gid *) (mc_map + 4);
2938 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
2939 if (id_priv->id.ps == RDMA_PS_UDP)
2940 mc_map[7] = 0x01; /* Use RDMA CM signature */
2941 *mgid = *(union ib_gid *) (mc_map + 4);
2945 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2946 struct cma_multicast *mc)
2948 struct ib_sa_mcmember_rec rec;
2949 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2950 ib_sa_comp_mask comp_mask;
2953 ib_addr_get_mgid(dev_addr, &rec.mgid);
2954 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2959 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
2960 if (id_priv->id.ps == RDMA_PS_UDP)
2961 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2962 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
2963 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2966 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2967 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2968 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2969 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2970 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2972 if (id_priv->id.ps == RDMA_PS_IPOIB)
2973 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2974 IB_SA_MCMEMBER_REC_RATE_SELECTOR;
2976 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2977 id_priv->id.port_num, &rec,
2978 comp_mask, GFP_KERNEL,
2979 cma_ib_mc_handler, mc);
2980 if (IS_ERR(mc->multicast.ib))
2981 return PTR_ERR(mc->multicast.ib);
2987 static void iboe_mcast_work_handler(struct work_struct *work)
2989 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
2990 struct cma_multicast *mc = mw->mc;
2991 struct ib_sa_multicast *m = mc->multicast.ib;
2993 mc->multicast.ib->context = mc;
2994 cma_ib_mc_handler(0, m);
2995 kref_put(&mc->mcref, release_mc);
2999 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3001 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3002 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3004 if (cma_any_addr(addr)) {
3005 memset(mgid, 0, sizeof *mgid);
3006 } else if (addr->sa_family == AF_INET6)
3007 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3009 mgid->raw[0] = 0xff;
3010 mgid->raw[1] = 0x0e;
3019 mgid->raw[10] = 0xff;
3020 mgid->raw[11] = 0xff;
3021 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3025 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3026 struct cma_multicast *mc)
3028 struct iboe_mcast_work *work;
3029 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3031 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3032 struct net_device *ndev = NULL;
3034 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3037 work = kzalloc(sizeof *work, GFP_KERNEL);
3041 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3042 if (!mc->multicast.ib) {
3047 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3049 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3050 if (id_priv->id.ps == RDMA_PS_UDP)
3051 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3053 if (dev_addr->bound_dev_if)
3054 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3060 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3061 mc->multicast.ib->rec.hop_limit = 1;
3063 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3065 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->if_mtu);
3068 if (!mc->multicast.ib->rec.mtu) {
3072 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3075 INIT_WORK(&work->work, iboe_mcast_work_handler);
3076 kref_get(&mc->mcref);
3077 queue_work(cma_wq, &work->work);
3082 kfree(mc->multicast.ib);
3088 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3091 struct rdma_id_private *id_priv;
3092 struct cma_multicast *mc;
3095 id_priv = container_of(id, struct rdma_id_private, id);
3096 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
3097 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
3100 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3104 memcpy(&mc->addr, addr, ip_addr_size(addr));
3105 mc->context = context;
3106 mc->id_priv = id_priv;
3108 spin_lock(&id_priv->lock);
3109 list_add(&mc->list, &id_priv->mc_list);
3110 spin_unlock(&id_priv->lock);
3112 switch (rdma_node_get_transport(id->device->node_type)) {
3113 case RDMA_TRANSPORT_IB:
3114 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3115 case IB_LINK_LAYER_INFINIBAND:
3116 ret = cma_join_ib_multicast(id_priv, mc);
3118 case IB_LINK_LAYER_ETHERNET:
3119 kref_init(&mc->mcref);
3120 ret = cma_iboe_join_multicast(id_priv, mc);
3132 spin_lock_irq(&id_priv->lock);
3133 list_del(&mc->list);
3134 spin_unlock_irq(&id_priv->lock);
3140 EXPORT_SYMBOL(rdma_join_multicast);
3142 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3144 struct rdma_id_private *id_priv;
3145 struct cma_multicast *mc;
3147 id_priv = container_of(id, struct rdma_id_private, id);
3148 spin_lock_irq(&id_priv->lock);
3149 list_for_each_entry(mc, &id_priv->mc_list, list) {
3150 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
3151 list_del(&mc->list);
3152 spin_unlock_irq(&id_priv->lock);
3155 ib_detach_mcast(id->qp,
3156 &mc->multicast.ib->rec.mgid,
3157 mc->multicast.ib->rec.mlid);
3158 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3159 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3160 case IB_LINK_LAYER_INFINIBAND:
3161 ib_sa_free_multicast(mc->multicast.ib);
3164 case IB_LINK_LAYER_ETHERNET:
3165 kref_put(&mc->mcref, release_mc);
3174 spin_unlock_irq(&id_priv->lock);
3176 EXPORT_SYMBOL(rdma_leave_multicast);
3178 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3180 struct rdma_dev_addr *dev_addr;
3181 struct cma_ndev_work *work;
3183 dev_addr = &id_priv->id.route.addr.dev_addr;
3186 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3187 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3188 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3189 ndev->name, &id_priv->id);
3191 if ((dev_addr->bound_dev_if == ndev->if_index) &&
3192 memcmp(dev_addr->src_dev_addr, IF_LLADDR(ndev), ndev->if_addrlen)) {
3193 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3194 ndev->if_xname, &id_priv->id);
3196 work = kzalloc(sizeof *work, GFP_KERNEL);
3200 INIT_WORK(&work->work, cma_ndev_work_handler);
3202 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3203 atomic_inc(&id_priv->refcount);
3204 queue_work(cma_wq, &work->work);
3210 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3213 struct net_device *ndev = (struct net_device *)ctx;
3214 struct cma_device *cma_dev;
3215 struct rdma_id_private *id_priv;
3216 int ret = NOTIFY_DONE;
3219 if (dev_net(ndev) != &init_net)
3222 if (event != NETDEV_BONDING_FAILOVER)
3225 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3228 if (event != NETDEV_DOWN && event != NETDEV_UNREGISTER)
3233 list_for_each_entry(cma_dev, &dev_list, list)
3234 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3235 ret = cma_netdev_change(ndev, id_priv);
3241 mutex_unlock(&lock);
3245 static struct notifier_block cma_nb = {
3246 .notifier_call = cma_netdev_callback
3249 static void cma_add_one(struct ib_device *device)
3251 struct cma_device *cma_dev;
3252 struct rdma_id_private *id_priv;
3254 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3258 cma_dev->device = device;
3260 init_completion(&cma_dev->comp);
3261 atomic_set(&cma_dev->refcount, 1);
3262 INIT_LIST_HEAD(&cma_dev->id_list);
3263 ib_set_client_data(device, &cma_client, cma_dev);
3266 list_add_tail(&cma_dev->list, &dev_list);
3267 list_for_each_entry(id_priv, &listen_any_list, list)
3268 cma_listen_on_dev(id_priv, cma_dev);
3269 mutex_unlock(&lock);
3272 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3274 struct rdma_cm_event event;
3275 enum cma_state state;
3278 /* Record that we want to remove the device */
3279 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
3280 if (state == CMA_DESTROYING)
3283 cma_cancel_operation(id_priv, state);
3284 mutex_lock(&id_priv->handler_mutex);
3286 /* Check for destruction from another callback. */
3287 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
3290 memset(&event, 0, sizeof event);
3291 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3292 ret = id_priv->id.event_handler(&id_priv->id, &event);
3294 mutex_unlock(&id_priv->handler_mutex);
3298 static void cma_process_remove(struct cma_device *cma_dev)
3300 struct rdma_id_private *id_priv;
3304 while (!list_empty(&cma_dev->id_list)) {
3305 id_priv = list_entry(cma_dev->id_list.next,
3306 struct rdma_id_private, list);
3308 list_del(&id_priv->listen_list);
3309 list_del_init(&id_priv->list);
3310 atomic_inc(&id_priv->refcount);
3311 mutex_unlock(&lock);
3313 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3314 cma_deref_id(id_priv);
3316 rdma_destroy_id(&id_priv->id);
3320 mutex_unlock(&lock);
3322 cma_deref_dev(cma_dev);
3323 wait_for_completion(&cma_dev->comp);
3326 static void cma_remove_one(struct ib_device *device)
3328 struct cma_device *cma_dev;
3330 cma_dev = ib_get_client_data(device, &cma_client);
3335 list_del(&cma_dev->list);
3336 mutex_unlock(&lock);
3338 cma_process_remove(cma_dev);
3342 static int cma_init(void)
3344 int ret, low, high, remaining;
3346 get_random_bytes(&next_port, sizeof next_port);
3347 inet_get_local_port_range(&low, &high);
3348 remaining = (high - low) + 1;
3349 next_port = ((unsigned int) next_port % remaining) + low;
3351 cma_wq = create_singlethread_workqueue("rdma_cm");
3355 ib_sa_register_client(&sa_client);
3356 rdma_addr_register_client(&addr_client);
3357 register_netdevice_notifier(&cma_nb);
3359 ret = ib_register_client(&cma_client);
3365 unregister_netdevice_notifier(&cma_nb);
3366 rdma_addr_unregister_client(&addr_client);
3367 ib_sa_unregister_client(&sa_client);
3368 destroy_workqueue(cma_wq);
3372 static void cma_cleanup(void)
3374 ib_unregister_client(&cma_client);
3375 unregister_netdevice_notifier(&cma_nb);
3376 rdma_addr_unregister_client(&addr_client);
3377 ib_sa_unregister_client(&sa_client);
3378 destroy_workqueue(cma_wq);
3379 idr_destroy(&sdp_ps);
3380 idr_destroy(&tcp_ps);
3381 idr_destroy(&udp_ps);
3382 idr_destroy(&ipoib_ps);
3385 module_init(cma_init);
3386 module_exit(cma_cleanup);