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>
46 #include <rdma/rdma_cm.h>
47 #include <rdma/rdma_cm_ib.h>
48 #include <rdma/ib_cache.h>
49 #include <rdma/ib_cm.h>
50 #include <rdma/ib_sa.h>
51 #include <rdma/iw_cm.h>
53 MODULE_AUTHOR("Sean Hefty");
54 MODULE_DESCRIPTION("Generic RDMA CM Agent");
55 MODULE_LICENSE("Dual BSD/GPL");
57 #define CMA_CM_RESPONSE_TIMEOUT 20
58 #define CMA_MAX_CM_RETRIES 15
59 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
61 static void cma_add_one(struct ib_device *device);
62 static void cma_remove_one(struct ib_device *device);
64 static struct ib_client cma_client = {
67 .remove = cma_remove_one
70 static struct ib_sa_client sa_client;
71 static struct rdma_addr_client addr_client;
72 static LIST_HEAD(dev_list);
73 static LIST_HEAD(listen_any_list);
74 static DEFINE_MUTEX(lock);
75 static struct workqueue_struct *cma_wq;
76 static DEFINE_IDR(sdp_ps);
77 static DEFINE_IDR(tcp_ps);
78 static DEFINE_IDR(udp_ps);
79 static DEFINE_IDR(ipoib_ps);
83 struct list_head list;
84 struct ib_device *device;
85 struct completion comp;
87 struct list_head id_list;
104 struct rdma_bind_list {
106 struct hlist_head owners;
111 * Device removal can occur at anytime, so we need extra handling to
112 * serialize notifying the user of device removal with other callbacks.
113 * We do this by disabling removal notification while a callback is in process,
114 * and reporting it after the callback completes.
116 struct rdma_id_private {
117 struct rdma_cm_id id;
119 struct rdma_bind_list *bind_list;
120 struct hlist_node node;
121 struct list_head list; /* listen_any_list or cma_device.list */
122 struct list_head listen_list; /* per device listens */
123 struct cma_device *cma_dev;
124 struct list_head mc_list;
127 enum cma_state state;
129 struct mutex qp_mutex;
131 struct completion comp;
133 wait_queue_head_t wait_remove;
138 struct ib_sa_query *query;
152 struct cma_multicast {
153 struct rdma_id_private *id_priv;
155 struct ib_sa_multicast *ib;
157 struct list_head list;
159 struct sockaddr addr;
160 u8 pad[sizeof(struct sockaddr_in6) -
161 sizeof(struct sockaddr)];
165 struct work_struct work;
166 struct rdma_id_private *id;
167 enum cma_state old_state;
168 enum cma_state new_state;
169 struct rdma_cm_event event;
182 u8 ip_version; /* IP version: 7:4 */
184 union cma_ip_addr src_addr;
185 union cma_ip_addr dst_addr;
190 u8 sdp_version; /* Major version: 7:4 */
191 u8 ip_version; /* IP version: 7:4 */
192 u8 sdp_specific1[10];
194 __be16 sdp_specific2;
195 union cma_ip_addr src_addr;
196 union cma_ip_addr dst_addr;
204 #define CMA_VERSION 0x00
205 #define SDP_MAJ_VERSION 0x2
207 static int cma_comp(struct rdma_id_private *id_priv, enum cma_state comp)
212 spin_lock_irqsave(&id_priv->lock, flags);
213 ret = (id_priv->state == comp);
214 spin_unlock_irqrestore(&id_priv->lock, flags);
218 static int cma_comp_exch(struct rdma_id_private *id_priv,
219 enum cma_state comp, enum cma_state exch)
224 spin_lock_irqsave(&id_priv->lock, flags);
225 if ((ret = (id_priv->state == comp)))
226 id_priv->state = exch;
227 spin_unlock_irqrestore(&id_priv->lock, flags);
231 static enum cma_state cma_exch(struct rdma_id_private *id_priv,
237 spin_lock_irqsave(&id_priv->lock, flags);
238 old = id_priv->state;
239 id_priv->state = exch;
240 spin_unlock_irqrestore(&id_priv->lock, flags);
244 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
246 return hdr->ip_version >> 4;
249 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
251 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
254 static inline u8 sdp_get_majv(u8 sdp_version)
256 return sdp_version >> 4;
259 static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
261 return hh->ip_version >> 4;
264 static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
266 hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
269 static inline int cma_is_ud_ps(enum rdma_port_space ps)
271 return (ps == RDMA_PS_UDP || ps == RDMA_PS_IPOIB);
274 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
275 struct cma_device *cma_dev)
277 atomic_inc(&cma_dev->refcount);
278 id_priv->cma_dev = cma_dev;
279 id_priv->id.device = cma_dev->device;
280 list_add_tail(&id_priv->list, &cma_dev->id_list);
283 static inline void cma_deref_dev(struct cma_device *cma_dev)
285 if (atomic_dec_and_test(&cma_dev->refcount))
286 complete(&cma_dev->comp);
289 static void cma_detach_from_dev(struct rdma_id_private *id_priv)
291 list_del(&id_priv->list);
292 cma_deref_dev(id_priv->cma_dev);
293 id_priv->cma_dev = NULL;
296 static int cma_set_qkey(struct ib_device *device, u8 port_num,
297 enum rdma_port_space ps,
298 struct rdma_dev_addr *dev_addr, u32 *qkey)
300 struct ib_sa_mcmember_rec rec;
305 *qkey = RDMA_UDP_QKEY;
308 ib_addr_get_mgid(dev_addr, &rec.mgid);
309 ret = ib_sa_get_mcmember_rec(device, port_num, &rec.mgid, &rec);
310 *qkey = be32_to_cpu(rec.qkey);
318 static int cma_acquire_dev(struct rdma_id_private *id_priv)
320 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
321 struct cma_device *cma_dev;
325 switch (rdma_node_get_transport(dev_addr->dev_type)) {
326 case RDMA_TRANSPORT_IB:
327 ib_addr_get_sgid(dev_addr, &gid);
329 case RDMA_TRANSPORT_IWARP:
330 iw_addr_get_sgid(dev_addr, &gid);
336 list_for_each_entry(cma_dev, &dev_list, list) {
337 ret = ib_find_cached_gid(cma_dev->device, &gid,
338 &id_priv->id.port_num, NULL);
340 ret = cma_set_qkey(cma_dev->device,
341 id_priv->id.port_num,
342 id_priv->id.ps, dev_addr,
345 cma_attach_to_dev(id_priv, cma_dev);
352 static void cma_deref_id(struct rdma_id_private *id_priv)
354 if (atomic_dec_and_test(&id_priv->refcount))
355 complete(&id_priv->comp);
358 static int cma_disable_remove(struct rdma_id_private *id_priv,
359 enum cma_state state)
364 spin_lock_irqsave(&id_priv->lock, flags);
365 if (id_priv->state == state) {
366 atomic_inc(&id_priv->dev_remove);
370 spin_unlock_irqrestore(&id_priv->lock, flags);
374 static void cma_enable_remove(struct rdma_id_private *id_priv)
376 if (atomic_dec_and_test(&id_priv->dev_remove))
377 wake_up(&id_priv->wait_remove);
380 static int cma_has_cm_dev(struct rdma_id_private *id_priv)
382 return (id_priv->id.device && id_priv->cm_id.ib);
385 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
386 void *context, enum rdma_port_space ps)
388 struct rdma_id_private *id_priv;
390 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
392 return ERR_PTR(-ENOMEM);
394 id_priv->state = CMA_IDLE;
395 id_priv->id.context = context;
396 id_priv->id.event_handler = event_handler;
398 spin_lock_init(&id_priv->lock);
399 mutex_init(&id_priv->qp_mutex);
400 init_completion(&id_priv->comp);
401 atomic_set(&id_priv->refcount, 1);
402 init_waitqueue_head(&id_priv->wait_remove);
403 atomic_set(&id_priv->dev_remove, 0);
404 INIT_LIST_HEAD(&id_priv->listen_list);
405 INIT_LIST_HEAD(&id_priv->mc_list);
406 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
410 EXPORT_SYMBOL(rdma_create_id);
412 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
414 struct ib_qp_attr qp_attr;
415 int qp_attr_mask, ret;
417 qp_attr.qp_state = IB_QPS_INIT;
418 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
422 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
426 qp_attr.qp_state = IB_QPS_RTR;
427 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
431 qp_attr.qp_state = IB_QPS_RTS;
433 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
438 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
440 struct ib_qp_attr qp_attr;
441 int qp_attr_mask, ret;
443 qp_attr.qp_state = IB_QPS_INIT;
444 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
448 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
451 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
452 struct ib_qp_init_attr *qp_init_attr)
454 struct rdma_id_private *id_priv;
458 id_priv = container_of(id, struct rdma_id_private, id);
459 if (id->device != pd->device)
462 qp = ib_create_qp(pd, qp_init_attr);
466 if (cma_is_ud_ps(id_priv->id.ps))
467 ret = cma_init_ud_qp(id_priv, qp);
469 ret = cma_init_conn_qp(id_priv, qp);
474 id_priv->qp_num = qp->qp_num;
475 id_priv->srq = (qp->srq != NULL);
481 EXPORT_SYMBOL(rdma_create_qp);
483 void rdma_destroy_qp(struct rdma_cm_id *id)
485 struct rdma_id_private *id_priv;
487 id_priv = container_of(id, struct rdma_id_private, id);
488 mutex_lock(&id_priv->qp_mutex);
489 ib_destroy_qp(id_priv->id.qp);
490 id_priv->id.qp = NULL;
491 mutex_unlock(&id_priv->qp_mutex);
493 EXPORT_SYMBOL(rdma_destroy_qp);
495 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
496 struct rdma_conn_param *conn_param)
498 struct ib_qp_attr qp_attr;
499 int qp_attr_mask, ret;
501 mutex_lock(&id_priv->qp_mutex);
502 if (!id_priv->id.qp) {
507 /* Need to update QP attributes from default values. */
508 qp_attr.qp_state = IB_QPS_INIT;
509 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
513 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
517 qp_attr.qp_state = IB_QPS_RTR;
518 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
523 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
524 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
526 mutex_unlock(&id_priv->qp_mutex);
530 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
531 struct rdma_conn_param *conn_param)
533 struct ib_qp_attr qp_attr;
534 int qp_attr_mask, ret;
536 mutex_lock(&id_priv->qp_mutex);
537 if (!id_priv->id.qp) {
542 qp_attr.qp_state = IB_QPS_RTS;
543 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
548 qp_attr.max_rd_atomic = conn_param->initiator_depth;
549 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
551 mutex_unlock(&id_priv->qp_mutex);
555 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
557 struct ib_qp_attr qp_attr;
560 mutex_lock(&id_priv->qp_mutex);
561 if (!id_priv->id.qp) {
566 qp_attr.qp_state = IB_QPS_ERR;
567 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
569 mutex_unlock(&id_priv->qp_mutex);
573 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
574 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
576 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
579 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
580 ib_addr_get_pkey(dev_addr),
581 &qp_attr->pkey_index);
585 qp_attr->port_num = id_priv->id.port_num;
586 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
588 if (cma_is_ud_ps(id_priv->id.ps)) {
589 qp_attr->qkey = id_priv->qkey;
590 *qp_attr_mask |= IB_QP_QKEY;
592 qp_attr->qp_access_flags = 0;
593 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
598 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
601 struct rdma_id_private *id_priv;
604 id_priv = container_of(id, struct rdma_id_private, id);
605 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
606 case RDMA_TRANSPORT_IB:
607 if (!id_priv->cm_id.ib || cma_is_ud_ps(id_priv->id.ps))
608 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
610 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
612 if (qp_attr->qp_state == IB_QPS_RTR)
613 qp_attr->rq_psn = id_priv->seq_num;
615 case RDMA_TRANSPORT_IWARP:
616 if (!id_priv->cm_id.iw) {
617 qp_attr->qp_access_flags = 0;
618 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
620 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
630 EXPORT_SYMBOL(rdma_init_qp_attr);
632 static inline int cma_zero_addr(struct sockaddr *addr)
634 struct in6_addr *ip6;
636 if (addr->sa_family == AF_INET)
637 return ipv4_is_zeronet(
638 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
640 ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
641 return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
642 ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
646 static inline int cma_loopback_addr(struct sockaddr *addr)
648 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
651 static inline int cma_any_addr(struct sockaddr *addr)
653 return cma_zero_addr(addr) || cma_loopback_addr(addr);
656 static inline __be16 cma_port(struct sockaddr *addr)
658 if (addr->sa_family == AF_INET)
659 return ((struct sockaddr_in *) addr)->sin_port;
661 return ((struct sockaddr_in6 *) addr)->sin6_port;
664 static inline int cma_any_port(struct sockaddr *addr)
666 return !cma_port(addr);
669 static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
670 u8 *ip_ver, __be16 *port,
671 union cma_ip_addr **src, union cma_ip_addr **dst)
675 if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
679 *ip_ver = sdp_get_ip_ver(hdr);
680 *port = ((struct sdp_hh *) hdr)->port;
681 *src = &((struct sdp_hh *) hdr)->src_addr;
682 *dst = &((struct sdp_hh *) hdr)->dst_addr;
685 if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
688 *ip_ver = cma_get_ip_ver(hdr);
689 *port = ((struct cma_hdr *) hdr)->port;
690 *src = &((struct cma_hdr *) hdr)->src_addr;
691 *dst = &((struct cma_hdr *) hdr)->dst_addr;
695 if (*ip_ver != 4 && *ip_ver != 6)
700 static void cma_save_net_info(struct rdma_addr *addr,
701 struct rdma_addr *listen_addr,
702 u8 ip_ver, __be16 port,
703 union cma_ip_addr *src, union cma_ip_addr *dst)
705 struct sockaddr_in *listen4, *ip4;
706 struct sockaddr_in6 *listen6, *ip6;
710 listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
711 ip4 = (struct sockaddr_in *) &addr->src_addr;
712 ip4->sin_family = listen4->sin_family;
713 ip4->sin_addr.s_addr = dst->ip4.addr;
714 ip4->sin_port = listen4->sin_port;
716 ip4 = (struct sockaddr_in *) &addr->dst_addr;
717 ip4->sin_family = listen4->sin_family;
718 ip4->sin_addr.s_addr = src->ip4.addr;
719 ip4->sin_port = port;
722 listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
723 ip6 = (struct sockaddr_in6 *) &addr->src_addr;
724 ip6->sin6_family = listen6->sin6_family;
725 ip6->sin6_addr = dst->ip6;
726 ip6->sin6_port = listen6->sin6_port;
728 ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
729 ip6->sin6_family = listen6->sin6_family;
730 ip6->sin6_addr = src->ip6;
731 ip6->sin6_port = port;
738 static inline int cma_user_data_offset(enum rdma_port_space ps)
744 return sizeof(struct cma_hdr);
748 static void cma_cancel_route(struct rdma_id_private *id_priv)
750 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
751 case RDMA_TRANSPORT_IB:
753 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
760 static void cma_cancel_listens(struct rdma_id_private *id_priv)
762 struct rdma_id_private *dev_id_priv;
765 * Remove from listen_any_list to prevent added devices from spawning
766 * additional listen requests.
769 list_del(&id_priv->list);
771 while (!list_empty(&id_priv->listen_list)) {
772 dev_id_priv = list_entry(id_priv->listen_list.next,
773 struct rdma_id_private, listen_list);
774 /* sync with device removal to avoid duplicate destruction */
775 list_del_init(&dev_id_priv->list);
776 list_del(&dev_id_priv->listen_list);
779 rdma_destroy_id(&dev_id_priv->id);
785 static void cma_cancel_operation(struct rdma_id_private *id_priv,
786 enum cma_state state)
790 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
792 case CMA_ROUTE_QUERY:
793 cma_cancel_route(id_priv);
796 if (cma_any_addr(&id_priv->id.route.addr.src_addr) &&
798 cma_cancel_listens(id_priv);
805 static void cma_release_port(struct rdma_id_private *id_priv)
807 struct rdma_bind_list *bind_list = id_priv->bind_list;
813 hlist_del(&id_priv->node);
814 if (hlist_empty(&bind_list->owners)) {
815 idr_remove(bind_list->ps, bind_list->port);
821 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
823 struct cma_multicast *mc;
825 while (!list_empty(&id_priv->mc_list)) {
826 mc = container_of(id_priv->mc_list.next,
827 struct cma_multicast, list);
829 ib_sa_free_multicast(mc->multicast.ib);
834 void rdma_destroy_id(struct rdma_cm_id *id)
836 struct rdma_id_private *id_priv;
837 enum cma_state state;
839 id_priv = container_of(id, struct rdma_id_private, id);
840 state = cma_exch(id_priv, CMA_DESTROYING);
841 cma_cancel_operation(id_priv, state);
844 if (id_priv->cma_dev) {
846 switch (rdma_node_get_transport(id->device->node_type)) {
847 case RDMA_TRANSPORT_IB:
848 if (id_priv->cm_id.ib && !IS_ERR(id_priv->cm_id.ib))
849 ib_destroy_cm_id(id_priv->cm_id.ib);
851 case RDMA_TRANSPORT_IWARP:
852 if (id_priv->cm_id.iw && !IS_ERR(id_priv->cm_id.iw))
853 iw_destroy_cm_id(id_priv->cm_id.iw);
858 cma_leave_mc_groups(id_priv);
860 cma_detach_from_dev(id_priv);
864 cma_release_port(id_priv);
865 cma_deref_id(id_priv);
866 wait_for_completion(&id_priv->comp);
868 if (id_priv->internal_id)
869 cma_deref_id(id_priv->id.context);
871 kfree(id_priv->id.route.path_rec);
874 EXPORT_SYMBOL(rdma_destroy_id);
876 static int cma_rep_recv(struct rdma_id_private *id_priv)
880 ret = cma_modify_qp_rtr(id_priv, NULL);
884 ret = cma_modify_qp_rts(id_priv, NULL);
888 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
894 cma_modify_qp_err(id_priv);
895 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
900 static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
902 if (id_priv->id.ps == RDMA_PS_SDP &&
903 sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
910 static void cma_set_rep_event_data(struct rdma_cm_event *event,
911 struct ib_cm_rep_event_param *rep_data,
914 event->param.conn.private_data = private_data;
915 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
916 event->param.conn.responder_resources = rep_data->responder_resources;
917 event->param.conn.initiator_depth = rep_data->initiator_depth;
918 event->param.conn.flow_control = rep_data->flow_control;
919 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
920 event->param.conn.srq = rep_data->srq;
921 event->param.conn.qp_num = rep_data->remote_qpn;
924 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
926 struct rdma_id_private *id_priv = cm_id->context;
927 struct rdma_cm_event event;
930 if (cma_disable_remove(id_priv, CMA_CONNECT))
933 memset(&event, 0, sizeof event);
934 switch (ib_event->event) {
935 case IB_CM_REQ_ERROR:
936 case IB_CM_REP_ERROR:
937 event.event = RDMA_CM_EVENT_UNREACHABLE;
938 event.status = -ETIMEDOUT;
940 case IB_CM_REP_RECEIVED:
941 event.status = cma_verify_rep(id_priv, ib_event->private_data);
943 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
944 else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
945 event.status = cma_rep_recv(id_priv);
946 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
947 RDMA_CM_EVENT_ESTABLISHED;
949 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
950 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
951 ib_event->private_data);
953 case IB_CM_RTU_RECEIVED:
954 case IB_CM_USER_ESTABLISHED:
955 event.event = RDMA_CM_EVENT_ESTABLISHED;
957 case IB_CM_DREQ_ERROR:
958 event.status = -ETIMEDOUT; /* fall through */
959 case IB_CM_DREQ_RECEIVED:
960 case IB_CM_DREP_RECEIVED:
961 if (!cma_comp_exch(id_priv, CMA_CONNECT, CMA_DISCONNECT))
963 event.event = RDMA_CM_EVENT_DISCONNECTED;
965 case IB_CM_TIMEWAIT_EXIT:
966 case IB_CM_MRA_RECEIVED:
969 case IB_CM_REJ_RECEIVED:
970 cma_modify_qp_err(id_priv);
971 event.status = ib_event->param.rej_rcvd.reason;
972 event.event = RDMA_CM_EVENT_REJECTED;
973 event.param.conn.private_data = ib_event->private_data;
974 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
977 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
982 ret = id_priv->id.event_handler(&id_priv->id, &event);
984 /* Destroy the CM ID by returning a non-zero value. */
985 id_priv->cm_id.ib = NULL;
986 cma_exch(id_priv, CMA_DESTROYING);
987 cma_enable_remove(id_priv);
988 rdma_destroy_id(&id_priv->id);
992 cma_enable_remove(id_priv);
996 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
997 struct ib_cm_event *ib_event)
999 struct rdma_id_private *id_priv;
1000 struct rdma_cm_id *id;
1001 struct rdma_route *rt;
1002 union cma_ip_addr *src, *dst;
1006 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1007 &ip_ver, &port, &src, &dst))
1010 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1015 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1016 ip_ver, port, src, dst);
1019 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1020 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1025 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1026 if (rt->num_paths == 2)
1027 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1029 ib_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1030 ib_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1031 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1032 rt->addr.dev_addr.dev_type = RDMA_NODE_IB_CA;
1034 id_priv = container_of(id, struct rdma_id_private, id);
1035 id_priv->state = CMA_CONNECT;
1039 rdma_destroy_id(id);
1044 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1045 struct ib_cm_event *ib_event)
1047 struct rdma_id_private *id_priv;
1048 struct rdma_cm_id *id;
1049 union cma_ip_addr *src, *dst;
1054 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1060 if (cma_get_net_info(ib_event->private_data, listen_id->ps,
1061 &ip_ver, &port, &src, &dst))
1064 cma_save_net_info(&id->route.addr, &listen_id->route.addr,
1065 ip_ver, port, src, dst);
1067 ret = rdma_translate_ip(&id->route.addr.src_addr,
1068 &id->route.addr.dev_addr);
1072 id_priv = container_of(id, struct rdma_id_private, id);
1073 id_priv->state = CMA_CONNECT;
1076 rdma_destroy_id(id);
1080 static void cma_set_req_event_data(struct rdma_cm_event *event,
1081 struct ib_cm_req_event_param *req_data,
1082 void *private_data, int offset)
1084 event->param.conn.private_data = private_data + offset;
1085 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1086 event->param.conn.responder_resources = req_data->responder_resources;
1087 event->param.conn.initiator_depth = req_data->initiator_depth;
1088 event->param.conn.flow_control = req_data->flow_control;
1089 event->param.conn.retry_count = req_data->retry_count;
1090 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1091 event->param.conn.srq = req_data->srq;
1092 event->param.conn.qp_num = req_data->remote_qpn;
1095 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1097 struct rdma_id_private *listen_id, *conn_id;
1098 struct rdma_cm_event event;
1101 listen_id = cm_id->context;
1102 if (cma_disable_remove(listen_id, CMA_LISTEN))
1103 return -ECONNABORTED;
1105 memset(&event, 0, sizeof event);
1106 offset = cma_user_data_offset(listen_id->id.ps);
1107 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1108 if (cma_is_ud_ps(listen_id->id.ps)) {
1109 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1110 event.param.ud.private_data = ib_event->private_data + offset;
1111 event.param.ud.private_data_len =
1112 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1114 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1115 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1116 ib_event->private_data, offset);
1123 atomic_inc(&conn_id->dev_remove);
1125 ret = cma_acquire_dev(conn_id);
1126 mutex_unlock(&lock);
1128 goto release_conn_id;
1130 conn_id->cm_id.ib = cm_id;
1131 cm_id->context = conn_id;
1132 cm_id->cm_handler = cma_ib_handler;
1134 ret = conn_id->id.event_handler(&conn_id->id, &event);
1137 * Acquire mutex to prevent user executing rdma_destroy_id()
1138 * while we're accessing the cm_id.
1141 if (cma_comp(conn_id, CMA_CONNECT) &&
1142 !cma_is_ud_ps(conn_id->id.ps))
1143 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1144 mutex_unlock(&lock);
1145 cma_enable_remove(conn_id);
1149 /* Destroy the CM ID by returning a non-zero value. */
1150 conn_id->cm_id.ib = NULL;
1153 cma_exch(conn_id, CMA_DESTROYING);
1154 cma_enable_remove(conn_id);
1155 rdma_destroy_id(&conn_id->id);
1158 cma_enable_remove(listen_id);
1162 static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
1164 return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
1167 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1168 struct ib_cm_compare_data *compare)
1170 struct cma_hdr *cma_data, *cma_mask;
1171 struct sdp_hh *sdp_data, *sdp_mask;
1173 struct in6_addr ip6_addr;
1175 memset(compare, 0, sizeof *compare);
1176 cma_data = (void *) compare->data;
1177 cma_mask = (void *) compare->mask;
1178 sdp_data = (void *) compare->data;
1179 sdp_mask = (void *) compare->mask;
1181 switch (addr->sa_family) {
1183 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1184 if (ps == RDMA_PS_SDP) {
1185 sdp_set_ip_ver(sdp_data, 4);
1186 sdp_set_ip_ver(sdp_mask, 0xF);
1187 sdp_data->dst_addr.ip4.addr = ip4_addr;
1188 sdp_mask->dst_addr.ip4.addr = htonl(~0);
1190 cma_set_ip_ver(cma_data, 4);
1191 cma_set_ip_ver(cma_mask, 0xF);
1192 cma_data->dst_addr.ip4.addr = ip4_addr;
1193 cma_mask->dst_addr.ip4.addr = htonl(~0);
1197 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1198 if (ps == RDMA_PS_SDP) {
1199 sdp_set_ip_ver(sdp_data, 6);
1200 sdp_set_ip_ver(sdp_mask, 0xF);
1201 sdp_data->dst_addr.ip6 = ip6_addr;
1202 memset(&sdp_mask->dst_addr.ip6, 0xFF,
1203 sizeof sdp_mask->dst_addr.ip6);
1205 cma_set_ip_ver(cma_data, 6);
1206 cma_set_ip_ver(cma_mask, 0xF);
1207 cma_data->dst_addr.ip6 = ip6_addr;
1208 memset(&cma_mask->dst_addr.ip6, 0xFF,
1209 sizeof cma_mask->dst_addr.ip6);
1217 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1219 struct rdma_id_private *id_priv = iw_id->context;
1220 struct rdma_cm_event event;
1221 struct sockaddr_in *sin;
1224 if (cma_disable_remove(id_priv, CMA_CONNECT))
1227 memset(&event, 0, sizeof event);
1228 switch (iw_event->event) {
1229 case IW_CM_EVENT_CLOSE:
1230 event.event = RDMA_CM_EVENT_DISCONNECTED;
1232 case IW_CM_EVENT_CONNECT_REPLY:
1233 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1234 *sin = iw_event->local_addr;
1235 sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
1236 *sin = iw_event->remote_addr;
1237 switch (iw_event->status) {
1239 event.event = RDMA_CM_EVENT_ESTABLISHED;
1243 event.event = RDMA_CM_EVENT_REJECTED;
1246 event.event = RDMA_CM_EVENT_UNREACHABLE;
1249 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1253 case IW_CM_EVENT_ESTABLISHED:
1254 event.event = RDMA_CM_EVENT_ESTABLISHED;
1260 event.status = iw_event->status;
1261 event.param.conn.private_data = iw_event->private_data;
1262 event.param.conn.private_data_len = iw_event->private_data_len;
1263 ret = id_priv->id.event_handler(&id_priv->id, &event);
1265 /* Destroy the CM ID by returning a non-zero value. */
1266 id_priv->cm_id.iw = NULL;
1267 cma_exch(id_priv, CMA_DESTROYING);
1268 cma_enable_remove(id_priv);
1269 rdma_destroy_id(&id_priv->id);
1273 cma_enable_remove(id_priv);
1277 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1278 struct iw_cm_event *iw_event)
1280 struct rdma_cm_id *new_cm_id;
1281 struct rdma_id_private *listen_id, *conn_id;
1282 struct sockaddr_in *sin;
1283 struct net_device *dev = NULL;
1284 struct rdma_cm_event event;
1286 struct ib_device_attr attr;
1288 listen_id = cm_id->context;
1289 if (cma_disable_remove(listen_id, CMA_LISTEN))
1290 return -ECONNABORTED;
1292 /* Create a new RDMA id for the new IW CM ID */
1293 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1294 listen_id->id.context,
1296 if (IS_ERR(new_cm_id)) {
1300 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1301 atomic_inc(&conn_id->dev_remove);
1302 conn_id->state = CMA_CONNECT;
1304 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1306 ret = -EADDRNOTAVAIL;
1307 cma_enable_remove(conn_id);
1308 rdma_destroy_id(new_cm_id);
1311 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1313 cma_enable_remove(conn_id);
1314 rdma_destroy_id(new_cm_id);
1319 ret = cma_acquire_dev(conn_id);
1320 mutex_unlock(&lock);
1322 cma_enable_remove(conn_id);
1323 rdma_destroy_id(new_cm_id);
1327 conn_id->cm_id.iw = cm_id;
1328 cm_id->context = conn_id;
1329 cm_id->cm_handler = cma_iw_handler;
1331 sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
1332 *sin = iw_event->local_addr;
1333 sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
1334 *sin = iw_event->remote_addr;
1336 ret = ib_query_device(conn_id->id.device, &attr);
1338 cma_enable_remove(conn_id);
1339 rdma_destroy_id(new_cm_id);
1343 memset(&event, 0, sizeof event);
1344 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1345 event.param.conn.private_data = iw_event->private_data;
1346 event.param.conn.private_data_len = iw_event->private_data_len;
1347 event.param.conn.initiator_depth = attr.max_qp_init_rd_atom;
1348 event.param.conn.responder_resources = attr.max_qp_rd_atom;
1349 ret = conn_id->id.event_handler(&conn_id->id, &event);
1351 /* User wants to destroy the CM ID */
1352 conn_id->cm_id.iw = NULL;
1353 cma_exch(conn_id, CMA_DESTROYING);
1354 cma_enable_remove(conn_id);
1355 rdma_destroy_id(&conn_id->id);
1361 cma_enable_remove(listen_id);
1365 static int cma_ib_listen(struct rdma_id_private *id_priv)
1367 struct ib_cm_compare_data compare_data;
1368 struct sockaddr *addr;
1372 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_req_handler,
1374 if (IS_ERR(id_priv->cm_id.ib))
1375 return PTR_ERR(id_priv->cm_id.ib);
1377 addr = &id_priv->id.route.addr.src_addr;
1378 svc_id = cma_get_service_id(id_priv->id.ps, addr);
1379 if (cma_any_addr(addr))
1380 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1382 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1383 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1387 ib_destroy_cm_id(id_priv->cm_id.ib);
1388 id_priv->cm_id.ib = NULL;
1394 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1397 struct sockaddr_in *sin;
1399 id_priv->cm_id.iw = iw_create_cm_id(id_priv->id.device,
1400 iw_conn_req_handler,
1402 if (IS_ERR(id_priv->cm_id.iw))
1403 return PTR_ERR(id_priv->cm_id.iw);
1405 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1406 id_priv->cm_id.iw->local_addr = *sin;
1408 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1411 iw_destroy_cm_id(id_priv->cm_id.iw);
1412 id_priv->cm_id.iw = NULL;
1418 static int cma_listen_handler(struct rdma_cm_id *id,
1419 struct rdma_cm_event *event)
1421 struct rdma_id_private *id_priv = id->context;
1423 id->context = id_priv->id.context;
1424 id->event_handler = id_priv->id.event_handler;
1425 return id_priv->id.event_handler(id, event);
1428 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1429 struct cma_device *cma_dev)
1431 struct rdma_id_private *dev_id_priv;
1432 struct rdma_cm_id *id;
1435 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps);
1439 dev_id_priv = container_of(id, struct rdma_id_private, id);
1441 dev_id_priv->state = CMA_ADDR_BOUND;
1442 memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
1443 ip_addr_size(&id_priv->id.route.addr.src_addr));
1445 cma_attach_to_dev(dev_id_priv, cma_dev);
1446 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1447 atomic_inc(&id_priv->refcount);
1448 dev_id_priv->internal_id = 1;
1450 ret = rdma_listen(id, id_priv->backlog);
1452 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1453 "listening on device %s\n", ret, cma_dev->device->name);
1456 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1458 struct cma_device *cma_dev;
1461 list_add_tail(&id_priv->list, &listen_any_list);
1462 list_for_each_entry(cma_dev, &dev_list, list)
1463 cma_listen_on_dev(id_priv, cma_dev);
1464 mutex_unlock(&lock);
1467 static int cma_bind_any(struct rdma_cm_id *id, sa_family_t af)
1469 struct sockaddr_in addr_in;
1471 memset(&addr_in, 0, sizeof addr_in);
1472 addr_in.sin_family = af;
1473 return rdma_bind_addr(id, (struct sockaddr *) &addr_in);
1476 int rdma_listen(struct rdma_cm_id *id, int backlog)
1478 struct rdma_id_private *id_priv;
1481 id_priv = container_of(id, struct rdma_id_private, id);
1482 if (id_priv->state == CMA_IDLE) {
1483 ret = cma_bind_any(id, AF_INET);
1488 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_LISTEN))
1491 id_priv->backlog = backlog;
1493 switch (rdma_node_get_transport(id->device->node_type)) {
1494 case RDMA_TRANSPORT_IB:
1495 ret = cma_ib_listen(id_priv);
1499 case RDMA_TRANSPORT_IWARP:
1500 ret = cma_iw_listen(id_priv, backlog);
1509 cma_listen_on_all(id_priv);
1513 id_priv->backlog = 0;
1514 cma_comp_exch(id_priv, CMA_LISTEN, CMA_ADDR_BOUND);
1517 EXPORT_SYMBOL(rdma_listen);
1519 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1521 struct rdma_id_private *id_priv;
1523 id_priv = container_of(id, struct rdma_id_private, id);
1524 id_priv->tos = (u8) tos;
1526 EXPORT_SYMBOL(rdma_set_service_type);
1528 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1531 struct cma_work *work = context;
1532 struct rdma_route *route;
1534 route = &work->id->id.route;
1537 route->num_paths = 1;
1538 *route->path_rec = *path_rec;
1540 work->old_state = CMA_ROUTE_QUERY;
1541 work->new_state = CMA_ADDR_RESOLVED;
1542 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1543 work->event.status = status;
1546 queue_work(cma_wq, &work->work);
1549 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1550 struct cma_work *work)
1552 struct rdma_addr *addr = &id_priv->id.route.addr;
1553 struct ib_sa_path_rec path_rec;
1554 ib_sa_comp_mask comp_mask;
1555 struct sockaddr_in6 *sin6;
1557 memset(&path_rec, 0, sizeof path_rec);
1558 ib_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
1559 ib_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
1560 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
1561 path_rec.numb_path = 1;
1562 path_rec.reversible = 1;
1563 path_rec.service_id = cma_get_service_id(id_priv->id.ps, &addr->dst_addr);
1565 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1566 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1567 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1569 if (addr->src_addr.sa_family == AF_INET) {
1570 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1571 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1573 sin6 = (struct sockaddr_in6 *) &addr->src_addr;
1574 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1575 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1578 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1579 id_priv->id.port_num, &path_rec,
1580 comp_mask, timeout_ms,
1581 GFP_KERNEL, cma_query_handler,
1582 work, &id_priv->query);
1584 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1587 static void cma_work_handler(struct work_struct *_work)
1589 struct cma_work *work = container_of(_work, struct cma_work, work);
1590 struct rdma_id_private *id_priv = work->id;
1593 atomic_inc(&id_priv->dev_remove);
1594 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1597 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1598 cma_exch(id_priv, CMA_DESTROYING);
1602 cma_enable_remove(id_priv);
1603 cma_deref_id(id_priv);
1605 rdma_destroy_id(&id_priv->id);
1609 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1611 struct rdma_route *route = &id_priv->id.route;
1612 struct cma_work *work;
1615 work = kzalloc(sizeof *work, GFP_KERNEL);
1620 INIT_WORK(&work->work, cma_work_handler);
1621 work->old_state = CMA_ROUTE_QUERY;
1622 work->new_state = CMA_ROUTE_RESOLVED;
1623 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1625 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1626 if (!route->path_rec) {
1631 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1637 kfree(route->path_rec);
1638 route->path_rec = NULL;
1644 int rdma_set_ib_paths(struct rdma_cm_id *id,
1645 struct ib_sa_path_rec *path_rec, int num_paths)
1647 struct rdma_id_private *id_priv;
1650 id_priv = container_of(id, struct rdma_id_private, id);
1651 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_RESOLVED))
1654 id->route.path_rec = kmalloc(sizeof *path_rec * num_paths, GFP_KERNEL);
1655 if (!id->route.path_rec) {
1660 memcpy(id->route.path_rec, path_rec, sizeof *path_rec * num_paths);
1663 cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_ADDR_RESOLVED);
1666 EXPORT_SYMBOL(rdma_set_ib_paths);
1668 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1670 struct cma_work *work;
1672 work = kzalloc(sizeof *work, GFP_KERNEL);
1677 INIT_WORK(&work->work, cma_work_handler);
1678 work->old_state = CMA_ROUTE_QUERY;
1679 work->new_state = CMA_ROUTE_RESOLVED;
1680 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1681 queue_work(cma_wq, &work->work);
1685 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1687 struct rdma_id_private *id_priv;
1690 id_priv = container_of(id, struct rdma_id_private, id);
1691 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ROUTE_QUERY))
1694 atomic_inc(&id_priv->refcount);
1695 switch (rdma_node_get_transport(id->device->node_type)) {
1696 case RDMA_TRANSPORT_IB:
1697 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1699 case RDMA_TRANSPORT_IWARP:
1700 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1711 cma_comp_exch(id_priv, CMA_ROUTE_QUERY, CMA_ADDR_RESOLVED);
1712 cma_deref_id(id_priv);
1715 EXPORT_SYMBOL(rdma_resolve_route);
1717 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1719 struct cma_device *cma_dev;
1720 struct ib_port_attr port_attr;
1727 if (list_empty(&dev_list)) {
1731 list_for_each_entry(cma_dev, &dev_list, list)
1732 for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
1733 if (!ib_query_port(cma_dev->device, p, &port_attr) &&
1734 port_attr.state == IB_PORT_ACTIVE)
1738 cma_dev = list_entry(dev_list.next, struct cma_device, list);
1741 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
1745 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
1749 ib_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1750 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
1751 id_priv->id.port_num = p;
1752 cma_attach_to_dev(id_priv, cma_dev);
1754 mutex_unlock(&lock);
1758 static void addr_handler(int status, struct sockaddr *src_addr,
1759 struct rdma_dev_addr *dev_addr, void *context)
1761 struct rdma_id_private *id_priv = context;
1762 struct rdma_cm_event event;
1764 memset(&event, 0, sizeof event);
1765 atomic_inc(&id_priv->dev_remove);
1768 * Grab mutex to block rdma_destroy_id() from removing the device while
1769 * we're trying to acquire it.
1772 if (!cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_RESOLVED)) {
1773 mutex_unlock(&lock);
1777 if (!status && !id_priv->cma_dev)
1778 status = cma_acquire_dev(id_priv);
1779 mutex_unlock(&lock);
1782 if (!cma_comp_exch(id_priv, CMA_ADDR_RESOLVED, CMA_ADDR_BOUND))
1784 event.event = RDMA_CM_EVENT_ADDR_ERROR;
1785 event.status = status;
1787 memcpy(&id_priv->id.route.addr.src_addr, src_addr,
1788 ip_addr_size(src_addr));
1789 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1792 if (id_priv->id.event_handler(&id_priv->id, &event)) {
1793 cma_exch(id_priv, CMA_DESTROYING);
1794 cma_enable_remove(id_priv);
1795 cma_deref_id(id_priv);
1796 rdma_destroy_id(&id_priv->id);
1800 cma_enable_remove(id_priv);
1801 cma_deref_id(id_priv);
1804 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
1806 struct cma_work *work;
1807 struct sockaddr_in *src_in, *dst_in;
1811 work = kzalloc(sizeof *work, GFP_KERNEL);
1815 if (!id_priv->cma_dev) {
1816 ret = cma_bind_loopback(id_priv);
1821 ib_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
1822 ib_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
1824 if (cma_zero_addr(&id_priv->id.route.addr.src_addr)) {
1825 src_in = (struct sockaddr_in *)&id_priv->id.route.addr.src_addr;
1826 dst_in = (struct sockaddr_in *)&id_priv->id.route.addr.dst_addr;
1827 src_in->sin_family = dst_in->sin_family;
1828 src_in->sin_addr.s_addr = dst_in->sin_addr.s_addr;
1832 INIT_WORK(&work->work, cma_work_handler);
1833 work->old_state = CMA_ADDR_QUERY;
1834 work->new_state = CMA_ADDR_RESOLVED;
1835 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
1836 queue_work(cma_wq, &work->work);
1843 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1844 struct sockaddr *dst_addr)
1846 if (src_addr && src_addr->sa_family)
1847 return rdma_bind_addr(id, src_addr);
1849 return cma_bind_any(id, dst_addr->sa_family);
1852 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
1853 struct sockaddr *dst_addr, int timeout_ms)
1855 struct rdma_id_private *id_priv;
1858 id_priv = container_of(id, struct rdma_id_private, id);
1859 if (id_priv->state == CMA_IDLE) {
1860 ret = cma_bind_addr(id, src_addr, dst_addr);
1865 if (!cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_ADDR_QUERY))
1868 atomic_inc(&id_priv->refcount);
1869 memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
1870 if (cma_any_addr(dst_addr))
1871 ret = cma_resolve_loopback(id_priv);
1873 ret = rdma_resolve_ip(&addr_client, &id->route.addr.src_addr,
1874 dst_addr, &id->route.addr.dev_addr,
1875 timeout_ms, addr_handler, id_priv);
1881 cma_comp_exch(id_priv, CMA_ADDR_QUERY, CMA_ADDR_BOUND);
1882 cma_deref_id(id_priv);
1885 EXPORT_SYMBOL(rdma_resolve_addr);
1887 static void cma_bind_port(struct rdma_bind_list *bind_list,
1888 struct rdma_id_private *id_priv)
1890 struct sockaddr_in *sin;
1892 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1893 sin->sin_port = htons(bind_list->port);
1894 id_priv->bind_list = bind_list;
1895 hlist_add_head(&id_priv->node, &bind_list->owners);
1898 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
1899 unsigned short snum)
1901 struct rdma_bind_list *bind_list;
1904 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1909 ret = idr_get_new_above(ps, bind_list, snum, &port);
1910 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1916 ret = -EADDRNOTAVAIL;
1921 bind_list->port = (unsigned short) port;
1922 cma_bind_port(bind_list, id_priv);
1925 idr_remove(ps, port);
1931 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
1933 struct rdma_bind_list *bind_list;
1934 int port, ret, low, high;
1936 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
1941 /* FIXME: add proper port randomization per like inet_csk_get_port */
1943 ret = idr_get_new_above(ps, bind_list, next_port, &port);
1944 } while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
1949 inet_get_local_port_range(&low, &high);
1951 if (next_port != low) {
1952 idr_remove(ps, port);
1956 ret = -EADDRNOTAVAIL;
1963 next_port = port + 1;
1966 bind_list->port = (unsigned short) port;
1967 cma_bind_port(bind_list, id_priv);
1970 idr_remove(ps, port);
1976 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
1978 struct rdma_id_private *cur_id;
1979 struct sockaddr_in *sin, *cur_sin;
1980 struct rdma_bind_list *bind_list;
1981 struct hlist_node *node;
1982 unsigned short snum;
1984 sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
1985 snum = ntohs(sin->sin_port);
1986 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
1989 bind_list = idr_find(ps, snum);
1991 return cma_alloc_port(ps, id_priv, snum);
1994 * We don't support binding to any address if anyone is bound to
1995 * a specific address on the same port.
1997 if (cma_any_addr(&id_priv->id.route.addr.src_addr))
1998 return -EADDRNOTAVAIL;
2000 hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
2001 if (cma_any_addr(&cur_id->id.route.addr.src_addr))
2002 return -EADDRNOTAVAIL;
2004 cur_sin = (struct sockaddr_in *) &cur_id->id.route.addr.src_addr;
2005 if (sin->sin_addr.s_addr == cur_sin->sin_addr.s_addr)
2009 cma_bind_port(bind_list, id_priv);
2013 static int cma_get_port(struct rdma_id_private *id_priv)
2018 switch (id_priv->id.ps) {
2032 return -EPROTONOSUPPORT;
2036 if (cma_any_port(&id_priv->id.route.addr.src_addr))
2037 ret = cma_alloc_any_port(ps, id_priv);
2039 ret = cma_use_port(ps, id_priv);
2040 mutex_unlock(&lock);
2045 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2047 struct rdma_id_private *id_priv;
2050 if (addr->sa_family != AF_INET)
2051 return -EAFNOSUPPORT;
2053 id_priv = container_of(id, struct rdma_id_private, id);
2054 if (!cma_comp_exch(id_priv, CMA_IDLE, CMA_ADDR_BOUND))
2057 if (!cma_any_addr(addr)) {
2058 ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
2063 ret = cma_acquire_dev(id_priv);
2064 mutex_unlock(&lock);
2069 memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
2070 ret = cma_get_port(id_priv);
2076 if (!cma_any_addr(addr)) {
2078 cma_detach_from_dev(id_priv);
2079 mutex_unlock(&lock);
2082 cma_comp_exch(id_priv, CMA_ADDR_BOUND, CMA_IDLE);
2085 EXPORT_SYMBOL(rdma_bind_addr);
2087 static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
2088 struct rdma_route *route)
2090 struct sockaddr_in *src4, *dst4;
2091 struct cma_hdr *cma_hdr;
2092 struct sdp_hh *sdp_hdr;
2094 src4 = (struct sockaddr_in *) &route->addr.src_addr;
2095 dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
2100 if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
2102 sdp_set_ip_ver(sdp_hdr, 4);
2103 sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2104 sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2105 sdp_hdr->port = src4->sin_port;
2109 cma_hdr->cma_version = CMA_VERSION;
2110 cma_set_ip_ver(cma_hdr, 4);
2111 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2112 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2113 cma_hdr->port = src4->sin_port;
2119 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2120 struct ib_cm_event *ib_event)
2122 struct rdma_id_private *id_priv = cm_id->context;
2123 struct rdma_cm_event event;
2124 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2127 if (cma_disable_remove(id_priv, CMA_CONNECT))
2130 memset(&event, 0, sizeof event);
2131 switch (ib_event->event) {
2132 case IB_CM_SIDR_REQ_ERROR:
2133 event.event = RDMA_CM_EVENT_UNREACHABLE;
2134 event.status = -ETIMEDOUT;
2136 case IB_CM_SIDR_REP_RECEIVED:
2137 event.param.ud.private_data = ib_event->private_data;
2138 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2139 if (rep->status != IB_SIDR_SUCCESS) {
2140 event.event = RDMA_CM_EVENT_UNREACHABLE;
2141 event.status = ib_event->param.sidr_rep_rcvd.status;
2144 if (id_priv->qkey != rep->qkey) {
2145 event.event = RDMA_CM_EVENT_UNREACHABLE;
2146 event.status = -EINVAL;
2149 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2150 id_priv->id.route.path_rec,
2151 &event.param.ud.ah_attr);
2152 event.param.ud.qp_num = rep->qpn;
2153 event.param.ud.qkey = rep->qkey;
2154 event.event = RDMA_CM_EVENT_ESTABLISHED;
2158 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2163 ret = id_priv->id.event_handler(&id_priv->id, &event);
2165 /* Destroy the CM ID by returning a non-zero value. */
2166 id_priv->cm_id.ib = NULL;
2167 cma_exch(id_priv, CMA_DESTROYING);
2168 cma_enable_remove(id_priv);
2169 rdma_destroy_id(&id_priv->id);
2173 cma_enable_remove(id_priv);
2177 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2178 struct rdma_conn_param *conn_param)
2180 struct ib_cm_sidr_req_param req;
2181 struct rdma_route *route;
2184 req.private_data_len = sizeof(struct cma_hdr) +
2185 conn_param->private_data_len;
2186 req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2187 if (!req.private_data)
2190 if (conn_param->private_data && conn_param->private_data_len)
2191 memcpy((void *) req.private_data + sizeof(struct cma_hdr),
2192 conn_param->private_data, conn_param->private_data_len);
2194 route = &id_priv->id.route;
2195 ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
2199 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device,
2200 cma_sidr_rep_handler, id_priv);
2201 if (IS_ERR(id_priv->cm_id.ib)) {
2202 ret = PTR_ERR(id_priv->cm_id.ib);
2206 req.path = route->path_rec;
2207 req.service_id = cma_get_service_id(id_priv->id.ps,
2208 &route->addr.dst_addr);
2209 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2210 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2212 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2214 ib_destroy_cm_id(id_priv->cm_id.ib);
2215 id_priv->cm_id.ib = NULL;
2218 kfree(req.private_data);
2222 static int cma_connect_ib(struct rdma_id_private *id_priv,
2223 struct rdma_conn_param *conn_param)
2225 struct ib_cm_req_param req;
2226 struct rdma_route *route;
2230 memset(&req, 0, sizeof req);
2231 offset = cma_user_data_offset(id_priv->id.ps);
2232 req.private_data_len = offset + conn_param->private_data_len;
2233 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2237 if (conn_param->private_data && conn_param->private_data_len)
2238 memcpy(private_data + offset, conn_param->private_data,
2239 conn_param->private_data_len);
2241 id_priv->cm_id.ib = ib_create_cm_id(id_priv->id.device, cma_ib_handler,
2243 if (IS_ERR(id_priv->cm_id.ib)) {
2244 ret = PTR_ERR(id_priv->cm_id.ib);
2248 route = &id_priv->id.route;
2249 ret = cma_format_hdr(private_data, id_priv->id.ps, route);
2252 req.private_data = private_data;
2254 req.primary_path = &route->path_rec[0];
2255 if (route->num_paths == 2)
2256 req.alternate_path = &route->path_rec[1];
2258 req.service_id = cma_get_service_id(id_priv->id.ps,
2259 &route->addr.dst_addr);
2260 req.qp_num = id_priv->qp_num;
2261 req.qp_type = IB_QPT_RC;
2262 req.starting_psn = id_priv->seq_num;
2263 req.responder_resources = conn_param->responder_resources;
2264 req.initiator_depth = conn_param->initiator_depth;
2265 req.flow_control = conn_param->flow_control;
2266 req.retry_count = conn_param->retry_count;
2267 req.rnr_retry_count = conn_param->rnr_retry_count;
2268 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2269 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2270 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2271 req.srq = id_priv->srq ? 1 : 0;
2273 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2275 if (ret && !IS_ERR(id_priv->cm_id.ib)) {
2276 ib_destroy_cm_id(id_priv->cm_id.ib);
2277 id_priv->cm_id.ib = NULL;
2280 kfree(private_data);
2284 static int cma_connect_iw(struct rdma_id_private *id_priv,
2285 struct rdma_conn_param *conn_param)
2287 struct iw_cm_id *cm_id;
2288 struct sockaddr_in* sin;
2290 struct iw_cm_conn_param iw_param;
2292 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2293 if (IS_ERR(cm_id)) {
2294 ret = PTR_ERR(cm_id);
2298 id_priv->cm_id.iw = cm_id;
2300 sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
2301 cm_id->local_addr = *sin;
2303 sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
2304 cm_id->remote_addr = *sin;
2306 ret = cma_modify_qp_rtr(id_priv, conn_param);
2310 iw_param.ord = conn_param->initiator_depth;
2311 iw_param.ird = conn_param->responder_resources;
2312 iw_param.private_data = conn_param->private_data;
2313 iw_param.private_data_len = conn_param->private_data_len;
2315 iw_param.qpn = id_priv->qp_num;
2317 iw_param.qpn = conn_param->qp_num;
2318 ret = iw_cm_connect(cm_id, &iw_param);
2320 if (ret && !IS_ERR(cm_id)) {
2321 iw_destroy_cm_id(cm_id);
2322 id_priv->cm_id.iw = NULL;
2327 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2329 struct rdma_id_private *id_priv;
2332 id_priv = container_of(id, struct rdma_id_private, id);
2333 if (!cma_comp_exch(id_priv, CMA_ROUTE_RESOLVED, CMA_CONNECT))
2337 id_priv->qp_num = conn_param->qp_num;
2338 id_priv->srq = conn_param->srq;
2341 switch (rdma_node_get_transport(id->device->node_type)) {
2342 case RDMA_TRANSPORT_IB:
2343 if (cma_is_ud_ps(id->ps))
2344 ret = cma_resolve_ib_udp(id_priv, conn_param);
2346 ret = cma_connect_ib(id_priv, conn_param);
2348 case RDMA_TRANSPORT_IWARP:
2349 ret = cma_connect_iw(id_priv, conn_param);
2360 cma_comp_exch(id_priv, CMA_CONNECT, CMA_ROUTE_RESOLVED);
2363 EXPORT_SYMBOL(rdma_connect);
2365 static int cma_accept_ib(struct rdma_id_private *id_priv,
2366 struct rdma_conn_param *conn_param)
2368 struct ib_cm_rep_param rep;
2371 ret = cma_modify_qp_rtr(id_priv, conn_param);
2375 ret = cma_modify_qp_rts(id_priv, conn_param);
2379 memset(&rep, 0, sizeof rep);
2380 rep.qp_num = id_priv->qp_num;
2381 rep.starting_psn = id_priv->seq_num;
2382 rep.private_data = conn_param->private_data;
2383 rep.private_data_len = conn_param->private_data_len;
2384 rep.responder_resources = conn_param->responder_resources;
2385 rep.initiator_depth = conn_param->initiator_depth;
2386 rep.failover_accepted = 0;
2387 rep.flow_control = conn_param->flow_control;
2388 rep.rnr_retry_count = conn_param->rnr_retry_count;
2389 rep.srq = id_priv->srq ? 1 : 0;
2391 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2396 static int cma_accept_iw(struct rdma_id_private *id_priv,
2397 struct rdma_conn_param *conn_param)
2399 struct iw_cm_conn_param iw_param;
2402 ret = cma_modify_qp_rtr(id_priv, conn_param);
2406 iw_param.ord = conn_param->initiator_depth;
2407 iw_param.ird = conn_param->responder_resources;
2408 iw_param.private_data = conn_param->private_data;
2409 iw_param.private_data_len = conn_param->private_data_len;
2410 if (id_priv->id.qp) {
2411 iw_param.qpn = id_priv->qp_num;
2413 iw_param.qpn = conn_param->qp_num;
2415 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2418 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2419 enum ib_cm_sidr_status status,
2420 const void *private_data, int private_data_len)
2422 struct ib_cm_sidr_rep_param rep;
2424 memset(&rep, 0, sizeof rep);
2425 rep.status = status;
2426 if (status == IB_SIDR_SUCCESS) {
2427 rep.qp_num = id_priv->qp_num;
2428 rep.qkey = id_priv->qkey;
2430 rep.private_data = private_data;
2431 rep.private_data_len = private_data_len;
2433 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2436 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2438 struct rdma_id_private *id_priv;
2441 id_priv = container_of(id, struct rdma_id_private, id);
2442 if (!cma_comp(id_priv, CMA_CONNECT))
2445 if (!id->qp && conn_param) {
2446 id_priv->qp_num = conn_param->qp_num;
2447 id_priv->srq = conn_param->srq;
2450 switch (rdma_node_get_transport(id->device->node_type)) {
2451 case RDMA_TRANSPORT_IB:
2452 if (cma_is_ud_ps(id->ps))
2453 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2454 conn_param->private_data,
2455 conn_param->private_data_len);
2456 else if (conn_param)
2457 ret = cma_accept_ib(id_priv, conn_param);
2459 ret = cma_rep_recv(id_priv);
2461 case RDMA_TRANSPORT_IWARP:
2462 ret = cma_accept_iw(id_priv, conn_param);
2474 cma_modify_qp_err(id_priv);
2475 rdma_reject(id, NULL, 0);
2478 EXPORT_SYMBOL(rdma_accept);
2480 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
2482 struct rdma_id_private *id_priv;
2485 id_priv = container_of(id, struct rdma_id_private, id);
2486 if (!cma_has_cm_dev(id_priv))
2489 switch (id->device->node_type) {
2490 case RDMA_NODE_IB_CA:
2491 ret = ib_cm_notify(id_priv->cm_id.ib, event);
2499 EXPORT_SYMBOL(rdma_notify);
2501 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
2502 u8 private_data_len)
2504 struct rdma_id_private *id_priv;
2507 id_priv = container_of(id, struct rdma_id_private, id);
2508 if (!cma_has_cm_dev(id_priv))
2511 switch (rdma_node_get_transport(id->device->node_type)) {
2512 case RDMA_TRANSPORT_IB:
2513 if (cma_is_ud_ps(id->ps))
2514 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
2515 private_data, private_data_len);
2517 ret = ib_send_cm_rej(id_priv->cm_id.ib,
2518 IB_CM_REJ_CONSUMER_DEFINED, NULL,
2519 0, private_data, private_data_len);
2521 case RDMA_TRANSPORT_IWARP:
2522 ret = iw_cm_reject(id_priv->cm_id.iw,
2523 private_data, private_data_len);
2531 EXPORT_SYMBOL(rdma_reject);
2533 int rdma_disconnect(struct rdma_cm_id *id)
2535 struct rdma_id_private *id_priv;
2538 id_priv = container_of(id, struct rdma_id_private, id);
2539 if (!cma_has_cm_dev(id_priv))
2542 switch (rdma_node_get_transport(id->device->node_type)) {
2543 case RDMA_TRANSPORT_IB:
2544 ret = cma_modify_qp_err(id_priv);
2547 /* Initiate or respond to a disconnect. */
2548 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
2549 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
2551 case RDMA_TRANSPORT_IWARP:
2552 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
2561 EXPORT_SYMBOL(rdma_disconnect);
2563 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
2565 struct rdma_id_private *id_priv;
2566 struct cma_multicast *mc = multicast->context;
2567 struct rdma_cm_event event;
2570 id_priv = mc->id_priv;
2571 if (cma_disable_remove(id_priv, CMA_ADDR_BOUND) &&
2572 cma_disable_remove(id_priv, CMA_ADDR_RESOLVED))
2575 mutex_lock(&id_priv->qp_mutex);
2576 if (!status && id_priv->id.qp)
2577 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
2578 multicast->rec.mlid);
2579 mutex_unlock(&id_priv->qp_mutex);
2581 memset(&event, 0, sizeof event);
2582 event.status = status;
2583 event.param.ud.private_data = mc->context;
2585 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
2586 ib_init_ah_from_mcmember(id_priv->id.device,
2587 id_priv->id.port_num, &multicast->rec,
2588 &event.param.ud.ah_attr);
2589 event.param.ud.qp_num = 0xFFFFFF;
2590 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
2592 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
2594 ret = id_priv->id.event_handler(&id_priv->id, &event);
2596 cma_exch(id_priv, CMA_DESTROYING);
2597 cma_enable_remove(id_priv);
2598 rdma_destroy_id(&id_priv->id);
2602 cma_enable_remove(id_priv);
2606 static void cma_set_mgid(struct rdma_id_private *id_priv,
2607 struct sockaddr *addr, union ib_gid *mgid)
2609 unsigned char mc_map[MAX_ADDR_LEN];
2610 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2611 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
2612 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
2614 if (cma_any_addr(addr)) {
2615 memset(mgid, 0, sizeof *mgid);
2616 } else if ((addr->sa_family == AF_INET6) &&
2617 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFF10A01B) ==
2619 /* IPv6 address is an SA assigned MGID. */
2620 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
2622 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
2623 if (id_priv->id.ps == RDMA_PS_UDP)
2624 mc_map[7] = 0x01; /* Use RDMA CM signature */
2625 *mgid = *(union ib_gid *) (mc_map + 4);
2629 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
2630 struct cma_multicast *mc)
2632 struct ib_sa_mcmember_rec rec;
2633 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2634 ib_sa_comp_mask comp_mask;
2637 ib_addr_get_mgid(dev_addr, &rec.mgid);
2638 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
2643 cma_set_mgid(id_priv, &mc->addr, &rec.mgid);
2644 if (id_priv->id.ps == RDMA_PS_UDP)
2645 rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
2646 ib_addr_get_sgid(dev_addr, &rec.port_gid);
2647 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2650 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
2651 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
2652 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
2653 IB_SA_MCMEMBER_REC_FLOW_LABEL |
2654 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
2656 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
2657 id_priv->id.port_num, &rec,
2658 comp_mask, GFP_KERNEL,
2659 cma_ib_mc_handler, mc);
2660 if (IS_ERR(mc->multicast.ib))
2661 return PTR_ERR(mc->multicast.ib);
2666 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
2669 struct rdma_id_private *id_priv;
2670 struct cma_multicast *mc;
2673 id_priv = container_of(id, struct rdma_id_private, id);
2674 if (!cma_comp(id_priv, CMA_ADDR_BOUND) &&
2675 !cma_comp(id_priv, CMA_ADDR_RESOLVED))
2678 mc = kmalloc(sizeof *mc, GFP_KERNEL);
2682 memcpy(&mc->addr, addr, ip_addr_size(addr));
2683 mc->context = context;
2684 mc->id_priv = id_priv;
2686 spin_lock(&id_priv->lock);
2687 list_add(&mc->list, &id_priv->mc_list);
2688 spin_unlock(&id_priv->lock);
2690 switch (rdma_node_get_transport(id->device->node_type)) {
2691 case RDMA_TRANSPORT_IB:
2692 ret = cma_join_ib_multicast(id_priv, mc);
2700 spin_lock_irq(&id_priv->lock);
2701 list_del(&mc->list);
2702 spin_unlock_irq(&id_priv->lock);
2707 EXPORT_SYMBOL(rdma_join_multicast);
2709 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
2711 struct rdma_id_private *id_priv;
2712 struct cma_multicast *mc;
2714 id_priv = container_of(id, struct rdma_id_private, id);
2715 spin_lock_irq(&id_priv->lock);
2716 list_for_each_entry(mc, &id_priv->mc_list, list) {
2717 if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
2718 list_del(&mc->list);
2719 spin_unlock_irq(&id_priv->lock);
2722 ib_detach_mcast(id->qp,
2723 &mc->multicast.ib->rec.mgid,
2724 mc->multicast.ib->rec.mlid);
2725 ib_sa_free_multicast(mc->multicast.ib);
2730 spin_unlock_irq(&id_priv->lock);
2732 EXPORT_SYMBOL(rdma_leave_multicast);
2734 static void cma_add_one(struct ib_device *device)
2736 struct cma_device *cma_dev;
2737 struct rdma_id_private *id_priv;
2739 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
2743 cma_dev->device = device;
2745 init_completion(&cma_dev->comp);
2746 atomic_set(&cma_dev->refcount, 1);
2747 INIT_LIST_HEAD(&cma_dev->id_list);
2748 ib_set_client_data(device, &cma_client, cma_dev);
2751 list_add_tail(&cma_dev->list, &dev_list);
2752 list_for_each_entry(id_priv, &listen_any_list, list)
2753 cma_listen_on_dev(id_priv, cma_dev);
2754 mutex_unlock(&lock);
2757 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
2759 struct rdma_cm_event event;
2760 enum cma_state state;
2762 /* Record that we want to remove the device */
2763 state = cma_exch(id_priv, CMA_DEVICE_REMOVAL);
2764 if (state == CMA_DESTROYING)
2767 cma_cancel_operation(id_priv, state);
2768 wait_event(id_priv->wait_remove, !atomic_read(&id_priv->dev_remove));
2770 /* Check for destruction from another callback. */
2771 if (!cma_comp(id_priv, CMA_DEVICE_REMOVAL))
2774 memset(&event, 0, sizeof event);
2775 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
2776 return id_priv->id.event_handler(&id_priv->id, &event);
2779 static void cma_process_remove(struct cma_device *cma_dev)
2781 struct rdma_id_private *id_priv;
2785 while (!list_empty(&cma_dev->id_list)) {
2786 id_priv = list_entry(cma_dev->id_list.next,
2787 struct rdma_id_private, list);
2789 list_del(&id_priv->listen_list);
2790 list_del_init(&id_priv->list);
2791 atomic_inc(&id_priv->refcount);
2792 mutex_unlock(&lock);
2794 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
2795 cma_deref_id(id_priv);
2797 rdma_destroy_id(&id_priv->id);
2801 mutex_unlock(&lock);
2803 cma_deref_dev(cma_dev);
2804 wait_for_completion(&cma_dev->comp);
2807 static void cma_remove_one(struct ib_device *device)
2809 struct cma_device *cma_dev;
2811 cma_dev = ib_get_client_data(device, &cma_client);
2816 list_del(&cma_dev->list);
2817 mutex_unlock(&lock);
2819 cma_process_remove(cma_dev);
2823 static int cma_init(void)
2825 int ret, low, high, remaining;
2827 get_random_bytes(&next_port, sizeof next_port);
2828 inet_get_local_port_range(&low, &high);
2829 remaining = (high - low) + 1;
2830 next_port = ((unsigned int) next_port % remaining) + low;
2832 cma_wq = create_singlethread_workqueue("rdma_cm");
2836 ib_sa_register_client(&sa_client);
2837 rdma_addr_register_client(&addr_client);
2839 ret = ib_register_client(&cma_client);
2845 rdma_addr_unregister_client(&addr_client);
2846 ib_sa_unregister_client(&sa_client);
2847 destroy_workqueue(cma_wq);
2851 static void cma_cleanup(void)
2853 ib_unregister_client(&cma_client);
2854 rdma_addr_unregister_client(&addr_client);
2855 ib_sa_unregister_client(&sa_client);
2856 destroy_workqueue(cma_wq);
2857 idr_destroy(&sdp_ps);
2858 idr_destroy(&tcp_ps);
2859 idr_destroy(&udp_ps);
2860 idr_destroy(&ipoib_ps);
2863 module_init(cma_init);
2864 module_exit(cma_cleanup);