2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/completion.h>
38 #include <linux/in6.h>
39 #include <linux/mutex.h>
40 #include <linux/random.h>
41 #include <linux/idr.h>
42 #include <linux/inetdevice.h>
43 #include <linux/slab.h>
44 #include <linux/module.h>
45 #include <net/route.h>
50 #include <rdma/rdma_cm.h>
51 #include <rdma/rdma_cm_ib.h>
52 #include <rdma/rdma_netlink.h>
54 #include <rdma/ib_cache.h>
55 #include <rdma/ib_cm.h>
56 #include <rdma/ib_sa.h>
57 #include <rdma/iw_cm.h>
59 MODULE_AUTHOR("Sean Hefty");
60 MODULE_DESCRIPTION("Generic RDMA CM Agent");
61 MODULE_LICENSE("Dual BSD/GPL");
63 #define CMA_CM_RESPONSE_TIMEOUT 20
64 #define CMA_MAX_CM_RETRIES 15
65 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
66 #define CMA_IBOE_PACKET_LIFETIME 18
68 static void cma_add_one(struct ib_device *device);
69 static void cma_remove_one(struct ib_device *device);
71 static struct ib_client cma_client = {
74 .remove = cma_remove_one
77 static struct ib_sa_client sa_client;
78 static struct rdma_addr_client addr_client;
79 static LIST_HEAD(dev_list);
80 static LIST_HEAD(listen_any_list);
81 static DEFINE_MUTEX(lock);
82 static struct workqueue_struct *cma_wq;
83 static DEFINE_IDR(tcp_ps);
84 static DEFINE_IDR(udp_ps);
85 static DEFINE_IDR(ipoib_ps);
86 static DEFINE_IDR(ib_ps);
89 struct list_head list;
90 struct ib_device *device;
91 struct completion comp;
93 struct list_head id_list;
96 struct rdma_bind_list {
98 struct hlist_head owners;
107 * Device removal can occur at anytime, so we need extra handling to
108 * serialize notifying the user of device removal with other callbacks.
109 * We do this by disabling removal notification while a callback is in process,
110 * and reporting it after the callback completes.
112 struct rdma_id_private {
113 struct rdma_cm_id id;
115 struct rdma_bind_list *bind_list;
116 struct hlist_node node;
117 struct list_head list; /* listen_any_list or cma_device.list */
118 struct list_head listen_list; /* per device listens */
119 struct cma_device *cma_dev;
120 struct list_head mc_list;
123 enum rdma_cm_state state;
125 struct mutex qp_mutex;
127 struct completion comp;
129 struct mutex handler_mutex;
133 struct ib_sa_query *query;
151 struct cma_multicast {
152 struct rdma_id_private *id_priv;
154 struct ib_sa_multicast *ib;
156 struct list_head list;
158 struct sockaddr_storage addr;
163 struct work_struct work;
164 struct rdma_id_private *id;
165 enum rdma_cm_state old_state;
166 enum rdma_cm_state new_state;
167 struct rdma_cm_event event;
170 struct cma_ndev_work {
171 struct work_struct work;
172 struct rdma_id_private *id;
173 struct rdma_cm_event event;
176 struct iboe_mcast_work {
177 struct work_struct work;
178 struct rdma_id_private *id;
179 struct cma_multicast *mc;
192 u8 ip_version; /* IP version: 7:4 */
194 union cma_ip_addr src_addr;
195 union cma_ip_addr dst_addr;
198 #define CMA_VERSION 0x00
200 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
205 spin_lock_irqsave(&id_priv->lock, flags);
206 ret = (id_priv->state == comp);
207 spin_unlock_irqrestore(&id_priv->lock, flags);
211 static int cma_comp_exch(struct rdma_id_private *id_priv,
212 enum rdma_cm_state comp, enum rdma_cm_state exch)
217 spin_lock_irqsave(&id_priv->lock, flags);
218 if ((ret = (id_priv->state == comp)))
219 id_priv->state = exch;
220 spin_unlock_irqrestore(&id_priv->lock, flags);
224 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
225 enum rdma_cm_state exch)
228 enum rdma_cm_state old;
230 spin_lock_irqsave(&id_priv->lock, flags);
231 old = id_priv->state;
232 id_priv->state = exch;
233 spin_unlock_irqrestore(&id_priv->lock, flags);
237 static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
239 return hdr->ip_version >> 4;
242 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
244 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
247 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
248 struct cma_device *cma_dev)
250 atomic_inc(&cma_dev->refcount);
251 id_priv->cma_dev = cma_dev;
252 id_priv->id.device = cma_dev->device;
253 id_priv->id.route.addr.dev_addr.transport =
254 rdma_node_get_transport(cma_dev->device->node_type);
255 list_add_tail(&id_priv->list, &cma_dev->id_list);
258 static inline void cma_deref_dev(struct cma_device *cma_dev)
260 if (atomic_dec_and_test(&cma_dev->refcount))
261 complete(&cma_dev->comp);
264 static inline void release_mc(struct kref *kref)
266 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
268 kfree(mc->multicast.ib);
272 static void cma_release_dev(struct rdma_id_private *id_priv)
275 list_del(&id_priv->list);
276 cma_deref_dev(id_priv->cma_dev);
277 id_priv->cma_dev = NULL;
281 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
283 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
286 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
288 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
291 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
293 return id_priv->id.route.addr.src_addr.ss_family;
296 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
298 struct ib_sa_mcmember_rec rec;
302 if (qkey && id_priv->qkey != qkey)
308 id_priv->qkey = qkey;
312 switch (id_priv->id.ps) {
315 id_priv->qkey = RDMA_UDP_QKEY;
318 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
319 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
320 id_priv->id.port_num, &rec.mgid,
323 id_priv->qkey = be32_to_cpu(rec.qkey);
331 static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
335 struct ib_port_attr props;
338 err = ib_query_port(device, port_num, &props);
342 for (i = 0; i < props.gid_tbl_len; ++i) {
343 err = ib_query_gid(device, port_num, i, &tmp);
346 if (!memcmp(&tmp, gid, sizeof tmp))
350 return -EADDRNOTAVAIL;
353 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
355 dev_addr->dev_type = ARPHRD_INFINIBAND;
356 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
357 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
360 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
364 if (addr->sa_family != AF_IB) {
365 ret = rdma_translate_ip(addr, dev_addr);
367 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
374 static int cma_acquire_dev(struct rdma_id_private *id_priv)
376 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
377 struct cma_device *cma_dev;
378 union ib_gid gid, iboe_gid;
381 enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
382 IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
384 if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
385 id_priv->id.ps == RDMA_PS_IPOIB)
389 iboe_addr_get_sgid(dev_addr, &iboe_gid);
390 memcpy(&gid, dev_addr->src_dev_addr +
391 rdma_addr_gid_offset(dev_addr), sizeof gid);
392 list_for_each_entry(cma_dev, &dev_list, list) {
393 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
394 if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
395 if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
396 rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
397 ret = find_gid_port(cma_dev->device, &iboe_gid, port);
399 ret = find_gid_port(cma_dev->device, &gid, port);
402 id_priv->id.port_num = port;
411 cma_attach_to_dev(id_priv, cma_dev);
418 * Select the source IB device and address to reach the destination IB address.
420 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
422 struct cma_device *cma_dev, *cur_dev;
423 struct sockaddr_ib *addr;
424 union ib_gid gid, sgid, *dgid;
430 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
431 dgid = (union ib_gid *) &addr->sib_addr;
432 pkey = ntohs(addr->sib_pkey);
434 list_for_each_entry(cur_dev, &dev_list, list) {
435 if (rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
438 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
439 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
442 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
443 if (!memcmp(&gid, dgid, sizeof(gid))) {
446 id_priv->id.port_num = p;
450 if (!cma_dev && (gid.global.subnet_prefix ==
451 dgid->global.subnet_prefix)) {
454 id_priv->id.port_num = p;
464 cma_attach_to_dev(id_priv, cma_dev);
465 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
466 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
467 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
471 static void cma_deref_id(struct rdma_id_private *id_priv)
473 if (atomic_dec_and_test(&id_priv->refcount))
474 complete(&id_priv->comp);
477 static int cma_disable_callback(struct rdma_id_private *id_priv,
478 enum rdma_cm_state state)
480 mutex_lock(&id_priv->handler_mutex);
481 if (id_priv->state != state) {
482 mutex_unlock(&id_priv->handler_mutex);
488 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
489 void *context, enum rdma_port_space ps,
490 enum ib_qp_type qp_type)
492 struct rdma_id_private *id_priv;
494 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
496 return ERR_PTR(-ENOMEM);
498 id_priv->owner = task_pid_nr(current);
499 id_priv->state = RDMA_CM_IDLE;
500 id_priv->id.context = context;
501 id_priv->id.event_handler = event_handler;
503 id_priv->id.qp_type = qp_type;
504 spin_lock_init(&id_priv->lock);
505 mutex_init(&id_priv->qp_mutex);
506 init_completion(&id_priv->comp);
507 atomic_set(&id_priv->refcount, 1);
508 mutex_init(&id_priv->handler_mutex);
509 INIT_LIST_HEAD(&id_priv->listen_list);
510 INIT_LIST_HEAD(&id_priv->mc_list);
511 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
515 EXPORT_SYMBOL(rdma_create_id);
517 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
519 struct ib_qp_attr qp_attr;
520 int qp_attr_mask, ret;
522 qp_attr.qp_state = IB_QPS_INIT;
523 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
527 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
531 qp_attr.qp_state = IB_QPS_RTR;
532 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
536 qp_attr.qp_state = IB_QPS_RTS;
538 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
543 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
545 struct ib_qp_attr qp_attr;
546 int qp_attr_mask, ret;
548 qp_attr.qp_state = IB_QPS_INIT;
549 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
553 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
556 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
557 struct ib_qp_init_attr *qp_init_attr)
559 struct rdma_id_private *id_priv;
563 id_priv = container_of(id, struct rdma_id_private, id);
564 if (id->device != pd->device)
567 qp = ib_create_qp(pd, qp_init_attr);
571 if (id->qp_type == IB_QPT_UD)
572 ret = cma_init_ud_qp(id_priv, qp);
574 ret = cma_init_conn_qp(id_priv, qp);
579 id_priv->qp_num = qp->qp_num;
580 id_priv->srq = (qp->srq != NULL);
586 EXPORT_SYMBOL(rdma_create_qp);
588 void rdma_destroy_qp(struct rdma_cm_id *id)
590 struct rdma_id_private *id_priv;
592 id_priv = container_of(id, struct rdma_id_private, id);
593 mutex_lock(&id_priv->qp_mutex);
594 ib_destroy_qp(id_priv->id.qp);
595 id_priv->id.qp = NULL;
596 mutex_unlock(&id_priv->qp_mutex);
598 EXPORT_SYMBOL(rdma_destroy_qp);
600 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
601 struct rdma_conn_param *conn_param)
603 struct ib_qp_attr qp_attr;
604 int qp_attr_mask, ret;
606 mutex_lock(&id_priv->qp_mutex);
607 if (!id_priv->id.qp) {
612 /* Need to update QP attributes from default values. */
613 qp_attr.qp_state = IB_QPS_INIT;
614 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
618 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
622 qp_attr.qp_state = IB_QPS_RTR;
623 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
628 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
629 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
631 mutex_unlock(&id_priv->qp_mutex);
635 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
636 struct rdma_conn_param *conn_param)
638 struct ib_qp_attr qp_attr;
639 int qp_attr_mask, ret;
641 mutex_lock(&id_priv->qp_mutex);
642 if (!id_priv->id.qp) {
647 qp_attr.qp_state = IB_QPS_RTS;
648 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
653 qp_attr.max_rd_atomic = conn_param->initiator_depth;
654 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
656 mutex_unlock(&id_priv->qp_mutex);
660 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
662 struct ib_qp_attr qp_attr;
665 mutex_lock(&id_priv->qp_mutex);
666 if (!id_priv->id.qp) {
671 qp_attr.qp_state = IB_QPS_ERR;
672 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
674 mutex_unlock(&id_priv->qp_mutex);
678 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
679 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
681 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
685 if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
686 IB_LINK_LAYER_INFINIBAND)
687 pkey = ib_addr_get_pkey(dev_addr);
691 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
692 pkey, &qp_attr->pkey_index);
696 qp_attr->port_num = id_priv->id.port_num;
697 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
699 if (id_priv->id.qp_type == IB_QPT_UD) {
700 ret = cma_set_qkey(id_priv, 0);
704 qp_attr->qkey = id_priv->qkey;
705 *qp_attr_mask |= IB_QP_QKEY;
707 qp_attr->qp_access_flags = 0;
708 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
713 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
716 struct rdma_id_private *id_priv;
719 id_priv = container_of(id, struct rdma_id_private, id);
720 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
721 case RDMA_TRANSPORT_IB:
722 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
723 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
725 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
727 if (qp_attr->qp_state == IB_QPS_RTR)
728 qp_attr->rq_psn = id_priv->seq_num;
730 case RDMA_TRANSPORT_IWARP:
731 if (!id_priv->cm_id.iw) {
732 qp_attr->qp_access_flags = 0;
733 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
735 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
745 EXPORT_SYMBOL(rdma_init_qp_attr);
747 static inline int cma_zero_addr(struct sockaddr *addr)
749 switch (addr->sa_family) {
751 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
753 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
755 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
761 static inline int cma_loopback_addr(struct sockaddr *addr)
763 switch (addr->sa_family) {
765 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
767 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
769 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
775 static inline int cma_any_addr(struct sockaddr *addr)
777 return cma_zero_addr(addr) || cma_loopback_addr(addr);
780 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
782 if (src->sa_family != dst->sa_family)
785 switch (src->sa_family) {
787 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
788 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
790 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
791 &((struct sockaddr_in6 *) dst)->sin6_addr);
793 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
794 &((struct sockaddr_ib *) dst)->sib_addr);
798 static __be16 cma_port(struct sockaddr *addr)
800 struct sockaddr_ib *sib;
802 switch (addr->sa_family) {
804 return ((struct sockaddr_in *) addr)->sin_port;
806 return ((struct sockaddr_in6 *) addr)->sin6_port;
808 sib = (struct sockaddr_ib *) addr;
809 return htons((u16) (be64_to_cpu(sib->sib_sid) &
810 be64_to_cpu(sib->sib_sid_mask)));
816 static inline int cma_any_port(struct sockaddr *addr)
818 return !cma_port(addr);
821 static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
822 struct ib_sa_path_rec *path)
824 struct sockaddr_ib *listen_ib, *ib;
826 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
827 ib = (struct sockaddr_ib *) &id->route.addr.src_addr;
828 ib->sib_family = listen_ib->sib_family;
829 ib->sib_pkey = path->pkey;
830 ib->sib_flowinfo = path->flow_label;
831 memcpy(&ib->sib_addr, &path->sgid, 16);
832 ib->sib_sid = listen_ib->sib_sid;
833 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
834 ib->sib_scope_id = listen_ib->sib_scope_id;
836 ib = (struct sockaddr_ib *) &id->route.addr.dst_addr;
837 ib->sib_family = listen_ib->sib_family;
838 ib->sib_pkey = path->pkey;
839 ib->sib_flowinfo = path->flow_label;
840 memcpy(&ib->sib_addr, &path->dgid, 16);
843 static void cma_save_ip4_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
846 struct sockaddr_in *listen4, *ip4;
848 listen4 = (struct sockaddr_in *) &listen_id->route.addr.src_addr;
849 ip4 = (struct sockaddr_in *) &id->route.addr.src_addr;
850 ip4->sin_family = listen4->sin_family;
851 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
852 ip4->sin_port = listen4->sin_port;
854 ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr;
855 ip4->sin_family = listen4->sin_family;
856 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
857 ip4->sin_port = hdr->port;
860 static void cma_save_ip6_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
863 struct sockaddr_in6 *listen6, *ip6;
865 listen6 = (struct sockaddr_in6 *) &listen_id->route.addr.src_addr;
866 ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr;
867 ip6->sin6_family = listen6->sin6_family;
868 ip6->sin6_addr = hdr->dst_addr.ip6;
869 ip6->sin6_port = listen6->sin6_port;
871 ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr;
872 ip6->sin6_family = listen6->sin6_family;
873 ip6->sin6_addr = hdr->src_addr.ip6;
874 ip6->sin6_port = hdr->port;
877 static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id *listen_id,
878 struct ib_cm_event *ib_event)
882 if (listen_id->route.addr.src_addr.ss_family == AF_IB) {
883 cma_save_ib_info(id, listen_id, ib_event->param.req_rcvd.primary_path);
887 hdr = ib_event->private_data;
888 if (hdr->cma_version != CMA_VERSION)
891 switch (cma_get_ip_ver(hdr)) {
893 cma_save_ip4_info(id, listen_id, hdr);
896 cma_save_ip6_info(id, listen_id, hdr);
904 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
906 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
909 static void cma_cancel_route(struct rdma_id_private *id_priv)
911 switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
912 case IB_LINK_LAYER_INFINIBAND:
914 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
921 static void cma_cancel_listens(struct rdma_id_private *id_priv)
923 struct rdma_id_private *dev_id_priv;
926 * Remove from listen_any_list to prevent added devices from spawning
927 * additional listen requests.
930 list_del(&id_priv->list);
932 while (!list_empty(&id_priv->listen_list)) {
933 dev_id_priv = list_entry(id_priv->listen_list.next,
934 struct rdma_id_private, listen_list);
935 /* sync with device removal to avoid duplicate destruction */
936 list_del_init(&dev_id_priv->list);
937 list_del(&dev_id_priv->listen_list);
940 rdma_destroy_id(&dev_id_priv->id);
946 static void cma_cancel_operation(struct rdma_id_private *id_priv,
947 enum rdma_cm_state state)
950 case RDMA_CM_ADDR_QUERY:
951 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
953 case RDMA_CM_ROUTE_QUERY:
954 cma_cancel_route(id_priv);
957 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
958 cma_cancel_listens(id_priv);
965 static void cma_release_port(struct rdma_id_private *id_priv)
967 struct rdma_bind_list *bind_list = id_priv->bind_list;
973 hlist_del(&id_priv->node);
974 if (hlist_empty(&bind_list->owners)) {
975 idr_remove(bind_list->ps, bind_list->port);
981 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
983 struct cma_multicast *mc;
985 while (!list_empty(&id_priv->mc_list)) {
986 mc = container_of(id_priv->mc_list.next,
987 struct cma_multicast, list);
989 switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
990 case IB_LINK_LAYER_INFINIBAND:
991 ib_sa_free_multicast(mc->multicast.ib);
994 case IB_LINK_LAYER_ETHERNET:
995 kref_put(&mc->mcref, release_mc);
1003 void rdma_destroy_id(struct rdma_cm_id *id)
1005 struct rdma_id_private *id_priv;
1006 enum rdma_cm_state state;
1008 id_priv = container_of(id, struct rdma_id_private, id);
1009 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1010 cma_cancel_operation(id_priv, state);
1013 * Wait for any active callback to finish. New callbacks will find
1014 * the id_priv state set to destroying and abort.
1016 mutex_lock(&id_priv->handler_mutex);
1017 mutex_unlock(&id_priv->handler_mutex);
1019 if (id_priv->cma_dev) {
1020 switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
1021 case RDMA_TRANSPORT_IB:
1022 if (id_priv->cm_id.ib)
1023 ib_destroy_cm_id(id_priv->cm_id.ib);
1025 case RDMA_TRANSPORT_IWARP:
1026 if (id_priv->cm_id.iw)
1027 iw_destroy_cm_id(id_priv->cm_id.iw);
1032 cma_leave_mc_groups(id_priv);
1033 cma_release_dev(id_priv);
1036 cma_release_port(id_priv);
1037 cma_deref_id(id_priv);
1038 wait_for_completion(&id_priv->comp);
1040 if (id_priv->internal_id)
1041 cma_deref_id(id_priv->id.context);
1043 kfree(id_priv->id.route.path_rec);
1046 EXPORT_SYMBOL(rdma_destroy_id);
1048 static int cma_rep_recv(struct rdma_id_private *id_priv)
1052 ret = cma_modify_qp_rtr(id_priv, NULL);
1056 ret = cma_modify_qp_rts(id_priv, NULL);
1060 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1066 cma_modify_qp_err(id_priv);
1067 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1072 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1073 struct ib_cm_rep_event_param *rep_data,
1076 event->param.conn.private_data = private_data;
1077 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1078 event->param.conn.responder_resources = rep_data->responder_resources;
1079 event->param.conn.initiator_depth = rep_data->initiator_depth;
1080 event->param.conn.flow_control = rep_data->flow_control;
1081 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1082 event->param.conn.srq = rep_data->srq;
1083 event->param.conn.qp_num = rep_data->remote_qpn;
1086 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1088 struct rdma_id_private *id_priv = cm_id->context;
1089 struct rdma_cm_event event;
1092 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1093 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1094 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1095 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1098 memset(&event, 0, sizeof event);
1099 switch (ib_event->event) {
1100 case IB_CM_REQ_ERROR:
1101 case IB_CM_REP_ERROR:
1102 event.event = RDMA_CM_EVENT_UNREACHABLE;
1103 event.status = -ETIMEDOUT;
1105 case IB_CM_REP_RECEIVED:
1106 if (id_priv->id.qp) {
1107 event.status = cma_rep_recv(id_priv);
1108 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1109 RDMA_CM_EVENT_ESTABLISHED;
1111 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1113 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1114 ib_event->private_data);
1116 case IB_CM_RTU_RECEIVED:
1117 case IB_CM_USER_ESTABLISHED:
1118 event.event = RDMA_CM_EVENT_ESTABLISHED;
1120 case IB_CM_DREQ_ERROR:
1121 event.status = -ETIMEDOUT; /* fall through */
1122 case IB_CM_DREQ_RECEIVED:
1123 case IB_CM_DREP_RECEIVED:
1124 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1125 RDMA_CM_DISCONNECT))
1127 event.event = RDMA_CM_EVENT_DISCONNECTED;
1129 case IB_CM_TIMEWAIT_EXIT:
1130 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1132 case IB_CM_MRA_RECEIVED:
1135 case IB_CM_REJ_RECEIVED:
1136 cma_modify_qp_err(id_priv);
1137 event.status = ib_event->param.rej_rcvd.reason;
1138 event.event = RDMA_CM_EVENT_REJECTED;
1139 event.param.conn.private_data = ib_event->private_data;
1140 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1143 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1148 ret = id_priv->id.event_handler(&id_priv->id, &event);
1150 /* Destroy the CM ID by returning a non-zero value. */
1151 id_priv->cm_id.ib = NULL;
1152 cma_exch(id_priv, RDMA_CM_DESTROYING);
1153 mutex_unlock(&id_priv->handler_mutex);
1154 rdma_destroy_id(&id_priv->id);
1158 mutex_unlock(&id_priv->handler_mutex);
1162 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1163 struct ib_cm_event *ib_event)
1165 struct rdma_id_private *id_priv;
1166 struct rdma_cm_id *id;
1167 struct rdma_route *rt;
1170 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1171 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1175 id_priv = container_of(id, struct rdma_id_private, id);
1176 if (cma_save_net_info(id, listen_id, ib_event))
1180 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1181 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1186 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1187 if (rt->num_paths == 2)
1188 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1190 if (cma_any_addr(cma_src_addr(id_priv))) {
1191 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1192 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1193 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1195 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1199 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1201 id_priv->state = RDMA_CM_CONNECT;
1205 rdma_destroy_id(id);
1209 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1210 struct ib_cm_event *ib_event)
1212 struct rdma_id_private *id_priv;
1213 struct rdma_cm_id *id;
1216 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1217 listen_id->ps, IB_QPT_UD);
1221 id_priv = container_of(id, struct rdma_id_private, id);
1222 if (cma_save_net_info(id, listen_id, ib_event))
1225 if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
1226 ret = cma_translate_addr(cma_src_addr(id_priv), &id->route.addr.dev_addr);
1231 id_priv->state = RDMA_CM_CONNECT;
1234 rdma_destroy_id(id);
1238 static void cma_set_req_event_data(struct rdma_cm_event *event,
1239 struct ib_cm_req_event_param *req_data,
1240 void *private_data, int offset)
1242 event->param.conn.private_data = private_data + offset;
1243 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1244 event->param.conn.responder_resources = req_data->responder_resources;
1245 event->param.conn.initiator_depth = req_data->initiator_depth;
1246 event->param.conn.flow_control = req_data->flow_control;
1247 event->param.conn.retry_count = req_data->retry_count;
1248 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1249 event->param.conn.srq = req_data->srq;
1250 event->param.conn.qp_num = req_data->remote_qpn;
1253 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1255 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1256 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1257 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1258 (id->qp_type == IB_QPT_UD)) ||
1262 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1264 struct rdma_id_private *listen_id, *conn_id;
1265 struct rdma_cm_event event;
1268 listen_id = cm_id->context;
1269 if (!cma_check_req_qp_type(&listen_id->id, ib_event))
1272 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1273 return -ECONNABORTED;
1275 memset(&event, 0, sizeof event);
1276 offset = cma_user_data_offset(listen_id);
1277 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1278 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1279 conn_id = cma_new_udp_id(&listen_id->id, ib_event);
1280 event.param.ud.private_data = ib_event->private_data + offset;
1281 event.param.ud.private_data_len =
1282 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1284 conn_id = cma_new_conn_id(&listen_id->id, ib_event);
1285 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1286 ib_event->private_data, offset);
1293 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1294 ret = cma_acquire_dev(conn_id);
1298 conn_id->cm_id.ib = cm_id;
1299 cm_id->context = conn_id;
1300 cm_id->cm_handler = cma_ib_handler;
1303 * Protect against the user destroying conn_id from another thread
1304 * until we're done accessing it.
1306 atomic_inc(&conn_id->refcount);
1307 ret = conn_id->id.event_handler(&conn_id->id, &event);
1312 * Acquire mutex to prevent user executing rdma_destroy_id()
1313 * while we're accessing the cm_id.
1316 if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
1317 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1318 mutex_unlock(&lock);
1319 mutex_unlock(&conn_id->handler_mutex);
1320 mutex_unlock(&listen_id->handler_mutex);
1321 cma_deref_id(conn_id);
1325 cma_deref_id(conn_id);
1326 /* Destroy the CM ID by returning a non-zero value. */
1327 conn_id->cm_id.ib = NULL;
1329 cma_exch(conn_id, RDMA_CM_DESTROYING);
1330 mutex_unlock(&conn_id->handler_mutex);
1332 mutex_unlock(&listen_id->handler_mutex);
1334 rdma_destroy_id(&conn_id->id);
1338 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1340 if (addr->sa_family == AF_IB)
1341 return ((struct sockaddr_ib *) addr)->sib_sid;
1343 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1345 EXPORT_SYMBOL(rdma_get_service_id);
1347 static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
1348 struct ib_cm_compare_data *compare)
1350 struct cma_hdr *cma_data, *cma_mask;
1352 struct in6_addr ip6_addr;
1354 memset(compare, 0, sizeof *compare);
1355 cma_data = (void *) compare->data;
1356 cma_mask = (void *) compare->mask;
1358 switch (addr->sa_family) {
1360 ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
1361 cma_set_ip_ver(cma_data, 4);
1362 cma_set_ip_ver(cma_mask, 0xF);
1363 if (!cma_any_addr(addr)) {
1364 cma_data->dst_addr.ip4.addr = ip4_addr;
1365 cma_mask->dst_addr.ip4.addr = htonl(~0);
1369 ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
1370 cma_set_ip_ver(cma_data, 6);
1371 cma_set_ip_ver(cma_mask, 0xF);
1372 if (!cma_any_addr(addr)) {
1373 cma_data->dst_addr.ip6 = ip6_addr;
1374 memset(&cma_mask->dst_addr.ip6, 0xFF,
1375 sizeof cma_mask->dst_addr.ip6);
1383 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1385 struct rdma_id_private *id_priv = iw_id->context;
1386 struct rdma_cm_event event;
1387 struct sockaddr_in *sin;
1390 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1393 memset(&event, 0, sizeof event);
1394 switch (iw_event->event) {
1395 case IW_CM_EVENT_CLOSE:
1396 event.event = RDMA_CM_EVENT_DISCONNECTED;
1398 case IW_CM_EVENT_CONNECT_REPLY:
1399 sin = (struct sockaddr_in *) cma_src_addr(id_priv);
1400 *sin = iw_event->local_addr;
1401 sin = (struct sockaddr_in *) cma_dst_addr(id_priv);
1402 *sin = iw_event->remote_addr;
1403 switch (iw_event->status) {
1405 event.event = RDMA_CM_EVENT_ESTABLISHED;
1406 event.param.conn.initiator_depth = iw_event->ird;
1407 event.param.conn.responder_resources = iw_event->ord;
1411 event.event = RDMA_CM_EVENT_REJECTED;
1414 event.event = RDMA_CM_EVENT_UNREACHABLE;
1417 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1421 case IW_CM_EVENT_ESTABLISHED:
1422 event.event = RDMA_CM_EVENT_ESTABLISHED;
1423 event.param.conn.initiator_depth = iw_event->ird;
1424 event.param.conn.responder_resources = iw_event->ord;
1430 event.status = iw_event->status;
1431 event.param.conn.private_data = iw_event->private_data;
1432 event.param.conn.private_data_len = iw_event->private_data_len;
1433 ret = id_priv->id.event_handler(&id_priv->id, &event);
1435 /* Destroy the CM ID by returning a non-zero value. */
1436 id_priv->cm_id.iw = NULL;
1437 cma_exch(id_priv, RDMA_CM_DESTROYING);
1438 mutex_unlock(&id_priv->handler_mutex);
1439 rdma_destroy_id(&id_priv->id);
1443 mutex_unlock(&id_priv->handler_mutex);
1447 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1448 struct iw_cm_event *iw_event)
1450 struct rdma_cm_id *new_cm_id;
1451 struct rdma_id_private *listen_id, *conn_id;
1452 struct sockaddr_in *sin;
1453 struct net_device *dev = NULL;
1454 struct rdma_cm_event event;
1456 struct ib_device_attr attr;
1458 listen_id = cm_id->context;
1459 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1460 return -ECONNABORTED;
1462 /* Create a new RDMA id for the new IW CM ID */
1463 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1464 listen_id->id.context,
1465 RDMA_PS_TCP, IB_QPT_RC);
1466 if (IS_ERR(new_cm_id)) {
1470 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1471 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1472 conn_id->state = RDMA_CM_CONNECT;
1474 dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
1476 ret = -EADDRNOTAVAIL;
1477 mutex_unlock(&conn_id->handler_mutex);
1478 rdma_destroy_id(new_cm_id);
1481 ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
1483 mutex_unlock(&conn_id->handler_mutex);
1484 rdma_destroy_id(new_cm_id);
1488 ret = cma_acquire_dev(conn_id);
1490 mutex_unlock(&conn_id->handler_mutex);
1491 rdma_destroy_id(new_cm_id);
1495 conn_id->cm_id.iw = cm_id;
1496 cm_id->context = conn_id;
1497 cm_id->cm_handler = cma_iw_handler;
1499 sin = (struct sockaddr_in *) cma_src_addr(conn_id);
1500 *sin = iw_event->local_addr;
1501 sin = (struct sockaddr_in *) cma_dst_addr(conn_id);
1502 *sin = iw_event->remote_addr;
1504 ret = ib_query_device(conn_id->id.device, &attr);
1506 mutex_unlock(&conn_id->handler_mutex);
1507 rdma_destroy_id(new_cm_id);
1511 memset(&event, 0, sizeof event);
1512 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1513 event.param.conn.private_data = iw_event->private_data;
1514 event.param.conn.private_data_len = iw_event->private_data_len;
1515 event.param.conn.initiator_depth = iw_event->ird;
1516 event.param.conn.responder_resources = iw_event->ord;
1519 * Protect against the user destroying conn_id from another thread
1520 * until we're done accessing it.
1522 atomic_inc(&conn_id->refcount);
1523 ret = conn_id->id.event_handler(&conn_id->id, &event);
1525 /* User wants to destroy the CM ID */
1526 conn_id->cm_id.iw = NULL;
1527 cma_exch(conn_id, RDMA_CM_DESTROYING);
1528 mutex_unlock(&conn_id->handler_mutex);
1529 cma_deref_id(conn_id);
1530 rdma_destroy_id(&conn_id->id);
1534 mutex_unlock(&conn_id->handler_mutex);
1535 cma_deref_id(conn_id);
1540 mutex_unlock(&listen_id->handler_mutex);
1544 static int cma_ib_listen(struct rdma_id_private *id_priv)
1546 struct ib_cm_compare_data compare_data;
1547 struct sockaddr *addr;
1548 struct ib_cm_id *id;
1552 id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
1556 id_priv->cm_id.ib = id;
1558 addr = cma_src_addr(id_priv);
1559 svc_id = rdma_get_service_id(&id_priv->id, addr);
1560 if (cma_any_addr(addr) && !id_priv->afonly)
1561 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
1563 cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
1564 ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
1568 ib_destroy_cm_id(id_priv->cm_id.ib);
1569 id_priv->cm_id.ib = NULL;
1575 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1578 struct sockaddr_in *sin;
1579 struct iw_cm_id *id;
1581 id = iw_create_cm_id(id_priv->id.device,
1582 iw_conn_req_handler,
1587 id_priv->cm_id.iw = id;
1589 sin = (struct sockaddr_in *) cma_src_addr(id_priv);
1590 id_priv->cm_id.iw->local_addr = *sin;
1592 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1595 iw_destroy_cm_id(id_priv->cm_id.iw);
1596 id_priv->cm_id.iw = NULL;
1602 static int cma_listen_handler(struct rdma_cm_id *id,
1603 struct rdma_cm_event *event)
1605 struct rdma_id_private *id_priv = id->context;
1607 id->context = id_priv->id.context;
1608 id->event_handler = id_priv->id.event_handler;
1609 return id_priv->id.event_handler(id, event);
1612 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
1613 struct cma_device *cma_dev)
1615 struct rdma_id_private *dev_id_priv;
1616 struct rdma_cm_id *id;
1619 if (cma_family(id_priv) == AF_IB &&
1620 rdma_node_get_transport(cma_dev->device->node_type) != RDMA_TRANSPORT_IB)
1623 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
1624 id_priv->id.qp_type);
1628 dev_id_priv = container_of(id, struct rdma_id_private, id);
1630 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
1631 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
1632 rdma_addr_size(cma_src_addr(id_priv)));
1634 cma_attach_to_dev(dev_id_priv, cma_dev);
1635 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
1636 atomic_inc(&id_priv->refcount);
1637 dev_id_priv->internal_id = 1;
1638 dev_id_priv->afonly = id_priv->afonly;
1640 ret = rdma_listen(id, id_priv->backlog);
1642 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
1643 "listening on device %s\n", ret, cma_dev->device->name);
1646 static void cma_listen_on_all(struct rdma_id_private *id_priv)
1648 struct cma_device *cma_dev;
1651 list_add_tail(&id_priv->list, &listen_any_list);
1652 list_for_each_entry(cma_dev, &dev_list, list)
1653 cma_listen_on_dev(id_priv, cma_dev);
1654 mutex_unlock(&lock);
1657 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
1659 struct rdma_id_private *id_priv;
1661 id_priv = container_of(id, struct rdma_id_private, id);
1662 id_priv->tos = (u8) tos;
1664 EXPORT_SYMBOL(rdma_set_service_type);
1666 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
1669 struct cma_work *work = context;
1670 struct rdma_route *route;
1672 route = &work->id->id.route;
1675 route->num_paths = 1;
1676 *route->path_rec = *path_rec;
1678 work->old_state = RDMA_CM_ROUTE_QUERY;
1679 work->new_state = RDMA_CM_ADDR_RESOLVED;
1680 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
1681 work->event.status = status;
1684 queue_work(cma_wq, &work->work);
1687 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
1688 struct cma_work *work)
1690 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1691 struct ib_sa_path_rec path_rec;
1692 ib_sa_comp_mask comp_mask;
1693 struct sockaddr_in6 *sin6;
1694 struct sockaddr_ib *sib;
1696 memset(&path_rec, 0, sizeof path_rec);
1697 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
1698 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
1699 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
1700 path_rec.numb_path = 1;
1701 path_rec.reversible = 1;
1702 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
1704 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
1705 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
1706 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
1708 switch (cma_family(id_priv)) {
1710 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
1711 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
1714 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
1715 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
1716 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1719 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
1720 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
1721 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
1725 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
1726 id_priv->id.port_num, &path_rec,
1727 comp_mask, timeout_ms,
1728 GFP_KERNEL, cma_query_handler,
1729 work, &id_priv->query);
1731 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
1734 static void cma_work_handler(struct work_struct *_work)
1736 struct cma_work *work = container_of(_work, struct cma_work, work);
1737 struct rdma_id_private *id_priv = work->id;
1740 mutex_lock(&id_priv->handler_mutex);
1741 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
1744 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1745 cma_exch(id_priv, RDMA_CM_DESTROYING);
1749 mutex_unlock(&id_priv->handler_mutex);
1750 cma_deref_id(id_priv);
1752 rdma_destroy_id(&id_priv->id);
1756 static void cma_ndev_work_handler(struct work_struct *_work)
1758 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
1759 struct rdma_id_private *id_priv = work->id;
1762 mutex_lock(&id_priv->handler_mutex);
1763 if (id_priv->state == RDMA_CM_DESTROYING ||
1764 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
1767 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
1768 cma_exch(id_priv, RDMA_CM_DESTROYING);
1773 mutex_unlock(&id_priv->handler_mutex);
1774 cma_deref_id(id_priv);
1776 rdma_destroy_id(&id_priv->id);
1780 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
1782 struct rdma_route *route = &id_priv->id.route;
1783 struct cma_work *work;
1786 work = kzalloc(sizeof *work, GFP_KERNEL);
1791 INIT_WORK(&work->work, cma_work_handler);
1792 work->old_state = RDMA_CM_ROUTE_QUERY;
1793 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1794 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1796 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
1797 if (!route->path_rec) {
1802 ret = cma_query_ib_route(id_priv, timeout_ms, work);
1808 kfree(route->path_rec);
1809 route->path_rec = NULL;
1815 int rdma_set_ib_paths(struct rdma_cm_id *id,
1816 struct ib_sa_path_rec *path_rec, int num_paths)
1818 struct rdma_id_private *id_priv;
1821 id_priv = container_of(id, struct rdma_id_private, id);
1822 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
1823 RDMA_CM_ROUTE_RESOLVED))
1826 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
1828 if (!id->route.path_rec) {
1833 id->route.num_paths = num_paths;
1836 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
1839 EXPORT_SYMBOL(rdma_set_ib_paths);
1841 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
1843 struct cma_work *work;
1845 work = kzalloc(sizeof *work, GFP_KERNEL);
1850 INIT_WORK(&work->work, cma_work_handler);
1851 work->old_state = RDMA_CM_ROUTE_QUERY;
1852 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1853 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1854 queue_work(cma_wq, &work->work);
1858 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
1860 struct rdma_route *route = &id_priv->id.route;
1861 struct rdma_addr *addr = &route->addr;
1862 struct cma_work *work;
1864 struct net_device *ndev = NULL;
1867 work = kzalloc(sizeof *work, GFP_KERNEL);
1872 INIT_WORK(&work->work, cma_work_handler);
1874 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
1875 if (!route->path_rec) {
1880 route->num_paths = 1;
1882 if (addr->dev_addr.bound_dev_if)
1883 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
1889 vid = rdma_vlan_dev_vlan_id(ndev);
1891 iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
1892 iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
1894 route->path_rec->hop_limit = 1;
1895 route->path_rec->reversible = 1;
1896 route->path_rec->pkey = cpu_to_be16(0xffff);
1897 route->path_rec->mtu_selector = IB_SA_EQ;
1898 route->path_rec->sl = netdev_get_prio_tc_map(
1899 ndev->priv_flags & IFF_802_1Q_VLAN ?
1900 vlan_dev_real_dev(ndev) : ndev,
1901 rt_tos2priority(id_priv->tos));
1903 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
1904 route->path_rec->rate_selector = IB_SA_EQ;
1905 route->path_rec->rate = iboe_get_rate(ndev);
1907 route->path_rec->packet_life_time_selector = IB_SA_EQ;
1908 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
1909 if (!route->path_rec->mtu) {
1914 work->old_state = RDMA_CM_ROUTE_QUERY;
1915 work->new_state = RDMA_CM_ROUTE_RESOLVED;
1916 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
1917 work->event.status = 0;
1919 queue_work(cma_wq, &work->work);
1924 kfree(route->path_rec);
1925 route->path_rec = NULL;
1931 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
1933 struct rdma_id_private *id_priv;
1936 id_priv = container_of(id, struct rdma_id_private, id);
1937 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
1940 atomic_inc(&id_priv->refcount);
1941 switch (rdma_node_get_transport(id->device->node_type)) {
1942 case RDMA_TRANSPORT_IB:
1943 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
1944 case IB_LINK_LAYER_INFINIBAND:
1945 ret = cma_resolve_ib_route(id_priv, timeout_ms);
1947 case IB_LINK_LAYER_ETHERNET:
1948 ret = cma_resolve_iboe_route(id_priv);
1954 case RDMA_TRANSPORT_IWARP:
1955 ret = cma_resolve_iw_route(id_priv, timeout_ms);
1966 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
1967 cma_deref_id(id_priv);
1970 EXPORT_SYMBOL(rdma_resolve_route);
1972 static void cma_set_loopback(struct sockaddr *addr)
1974 switch (addr->sa_family) {
1976 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
1979 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
1983 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
1989 static int cma_bind_loopback(struct rdma_id_private *id_priv)
1991 struct cma_device *cma_dev, *cur_dev;
1992 struct ib_port_attr port_attr;
2000 list_for_each_entry(cur_dev, &dev_list, list) {
2001 if (cma_family(id_priv) == AF_IB &&
2002 rdma_node_get_transport(cur_dev->device->node_type) != RDMA_TRANSPORT_IB)
2008 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2009 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2010 port_attr.state == IB_PORT_ACTIVE) {
2025 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
2029 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2033 id_priv->id.route.addr.dev_addr.dev_type =
2034 (rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
2035 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2037 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2038 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2039 id_priv->id.port_num = p;
2040 cma_attach_to_dev(id_priv, cma_dev);
2041 cma_set_loopback(cma_src_addr(id_priv));
2043 mutex_unlock(&lock);
2047 static void addr_handler(int status, struct sockaddr *src_addr,
2048 struct rdma_dev_addr *dev_addr, void *context)
2050 struct rdma_id_private *id_priv = context;
2051 struct rdma_cm_event event;
2053 memset(&event, 0, sizeof event);
2054 mutex_lock(&id_priv->handler_mutex);
2055 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2056 RDMA_CM_ADDR_RESOLVED))
2059 if (!status && !id_priv->cma_dev)
2060 status = cma_acquire_dev(id_priv);
2063 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2064 RDMA_CM_ADDR_BOUND))
2066 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2067 event.status = status;
2069 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2070 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2073 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2074 cma_exch(id_priv, RDMA_CM_DESTROYING);
2075 mutex_unlock(&id_priv->handler_mutex);
2076 cma_deref_id(id_priv);
2077 rdma_destroy_id(&id_priv->id);
2081 mutex_unlock(&id_priv->handler_mutex);
2082 cma_deref_id(id_priv);
2085 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2087 struct cma_work *work;
2091 work = kzalloc(sizeof *work, GFP_KERNEL);
2095 if (!id_priv->cma_dev) {
2096 ret = cma_bind_loopback(id_priv);
2101 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2102 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2105 INIT_WORK(&work->work, cma_work_handler);
2106 work->old_state = RDMA_CM_ADDR_QUERY;
2107 work->new_state = RDMA_CM_ADDR_RESOLVED;
2108 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2109 queue_work(cma_wq, &work->work);
2116 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2118 struct cma_work *work;
2121 work = kzalloc(sizeof *work, GFP_KERNEL);
2125 if (!id_priv->cma_dev) {
2126 ret = cma_resolve_ib_dev(id_priv);
2131 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2132 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2135 INIT_WORK(&work->work, cma_work_handler);
2136 work->old_state = RDMA_CM_ADDR_QUERY;
2137 work->new_state = RDMA_CM_ADDR_RESOLVED;
2138 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2139 queue_work(cma_wq, &work->work);
2146 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2147 struct sockaddr *dst_addr)
2149 if (!src_addr || !src_addr->sa_family) {
2150 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2151 src_addr->sa_family = dst_addr->sa_family;
2152 if (dst_addr->sa_family == AF_INET6) {
2153 ((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
2154 ((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
2155 } else if (dst_addr->sa_family == AF_IB) {
2156 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2157 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2160 return rdma_bind_addr(id, src_addr);
2163 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2164 struct sockaddr *dst_addr, int timeout_ms)
2166 struct rdma_id_private *id_priv;
2169 id_priv = container_of(id, struct rdma_id_private, id);
2170 if (id_priv->state == RDMA_CM_IDLE) {
2171 ret = cma_bind_addr(id, src_addr, dst_addr);
2176 if (cma_family(id_priv) != dst_addr->sa_family)
2179 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2182 atomic_inc(&id_priv->refcount);
2183 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2184 if (cma_any_addr(dst_addr)) {
2185 ret = cma_resolve_loopback(id_priv);
2187 if (dst_addr->sa_family == AF_IB) {
2188 ret = cma_resolve_ib_addr(id_priv);
2190 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2191 dst_addr, &id->route.addr.dev_addr,
2192 timeout_ms, addr_handler, id_priv);
2200 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2201 cma_deref_id(id_priv);
2204 EXPORT_SYMBOL(rdma_resolve_addr);
2206 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2208 struct rdma_id_private *id_priv;
2209 unsigned long flags;
2212 id_priv = container_of(id, struct rdma_id_private, id);
2213 spin_lock_irqsave(&id_priv->lock, flags);
2214 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2215 id_priv->reuseaddr = reuse;
2220 spin_unlock_irqrestore(&id_priv->lock, flags);
2223 EXPORT_SYMBOL(rdma_set_reuseaddr);
2225 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2227 struct rdma_id_private *id_priv;
2228 unsigned long flags;
2231 id_priv = container_of(id, struct rdma_id_private, id);
2232 spin_lock_irqsave(&id_priv->lock, flags);
2233 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2234 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2235 id_priv->afonly = afonly;
2240 spin_unlock_irqrestore(&id_priv->lock, flags);
2243 EXPORT_SYMBOL(rdma_set_afonly);
2245 static void cma_bind_port(struct rdma_bind_list *bind_list,
2246 struct rdma_id_private *id_priv)
2248 struct sockaddr *addr;
2249 struct sockaddr_ib *sib;
2253 addr = cma_src_addr(id_priv);
2254 port = htons(bind_list->port);
2256 switch (addr->sa_family) {
2258 ((struct sockaddr_in *) addr)->sin_port = port;
2261 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2264 sib = (struct sockaddr_ib *) addr;
2265 sid = be64_to_cpu(sib->sib_sid);
2266 mask = be64_to_cpu(sib->sib_sid_mask);
2267 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2268 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2271 id_priv->bind_list = bind_list;
2272 hlist_add_head(&id_priv->node, &bind_list->owners);
2275 static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
2276 unsigned short snum)
2278 struct rdma_bind_list *bind_list;
2281 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2285 ret = idr_alloc(ps, bind_list, snum, snum + 1, GFP_KERNEL);
2290 bind_list->port = (unsigned short)ret;
2291 cma_bind_port(bind_list, id_priv);
2295 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2298 static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
2300 static unsigned int last_used_port;
2301 int low, high, remaining;
2304 inet_get_local_port_range(&low, &high);
2305 remaining = (high - low) + 1;
2306 rover = net_random() % remaining + low;
2308 if (last_used_port != rover &&
2309 !idr_find(ps, (unsigned short) rover)) {
2310 int ret = cma_alloc_port(ps, id_priv, rover);
2312 * Remember previously used port number in order to avoid
2313 * re-using same port immediately after it is closed.
2316 last_used_port = rover;
2317 if (ret != -EADDRNOTAVAIL)
2322 if ((rover < low) || (rover > high))
2326 return -EADDRNOTAVAIL;
2330 * Check that the requested port is available. This is called when trying to
2331 * bind to a specific port, or when trying to listen on a bound port. In
2332 * the latter case, the provided id_priv may already be on the bind_list, but
2333 * we still need to check that it's okay to start listening.
2335 static int cma_check_port(struct rdma_bind_list *bind_list,
2336 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2338 struct rdma_id_private *cur_id;
2339 struct sockaddr *addr, *cur_addr;
2341 addr = cma_src_addr(id_priv);
2342 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2343 if (id_priv == cur_id)
2346 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2350 cur_addr = cma_src_addr(cur_id);
2351 if (id_priv->afonly && cur_id->afonly &&
2352 (addr->sa_family != cur_addr->sa_family))
2355 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2356 return -EADDRNOTAVAIL;
2358 if (!cma_addr_cmp(addr, cur_addr))
2364 static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
2366 struct rdma_bind_list *bind_list;
2367 unsigned short snum;
2370 snum = ntohs(cma_port(cma_src_addr(id_priv)));
2371 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2374 bind_list = idr_find(ps, snum);
2376 ret = cma_alloc_port(ps, id_priv, snum);
2378 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2380 cma_bind_port(bind_list, id_priv);
2385 static int cma_bind_listen(struct rdma_id_private *id_priv)
2387 struct rdma_bind_list *bind_list = id_priv->bind_list;
2391 if (bind_list->owners.first->next)
2392 ret = cma_check_port(bind_list, id_priv, 0);
2393 mutex_unlock(&lock);
2397 static struct idr *cma_select_inet_ps(struct rdma_id_private *id_priv)
2399 switch (id_priv->id.ps) {
2413 static struct idr *cma_select_ib_ps(struct rdma_id_private *id_priv)
2415 struct idr *ps = NULL;
2416 struct sockaddr_ib *sib;
2417 u64 sid_ps, mask, sid;
2419 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2420 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2421 sid = be64_to_cpu(sib->sib_sid) & mask;
2423 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2424 sid_ps = RDMA_IB_IP_PS_IB;
2426 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2427 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2428 sid_ps = RDMA_IB_IP_PS_TCP;
2430 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2431 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2432 sid_ps = RDMA_IB_IP_PS_UDP;
2437 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2438 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2439 be64_to_cpu(sib->sib_sid_mask));
2444 static int cma_get_port(struct rdma_id_private *id_priv)
2449 if (cma_family(id_priv) != AF_IB)
2450 ps = cma_select_inet_ps(id_priv);
2452 ps = cma_select_ib_ps(id_priv);
2454 return -EPROTONOSUPPORT;
2457 if (cma_any_port(cma_src_addr(id_priv)))
2458 ret = cma_alloc_any_port(ps, id_priv);
2460 ret = cma_use_port(ps, id_priv);
2461 mutex_unlock(&lock);
2466 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2467 struct sockaddr *addr)
2469 #if IS_ENABLED(CONFIG_IPV6)
2470 struct sockaddr_in6 *sin6;
2472 if (addr->sa_family != AF_INET6)
2475 sin6 = (struct sockaddr_in6 *) addr;
2476 if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
2477 !sin6->sin6_scope_id)
2480 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2485 int rdma_listen(struct rdma_cm_id *id, int backlog)
2487 struct rdma_id_private *id_priv;
2490 id_priv = container_of(id, struct rdma_id_private, id);
2491 if (id_priv->state == RDMA_CM_IDLE) {
2492 id->route.addr.src_addr.ss_family = AF_INET;
2493 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
2498 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2501 if (id_priv->reuseaddr) {
2502 ret = cma_bind_listen(id_priv);
2507 id_priv->backlog = backlog;
2509 switch (rdma_node_get_transport(id->device->node_type)) {
2510 case RDMA_TRANSPORT_IB:
2511 ret = cma_ib_listen(id_priv);
2515 case RDMA_TRANSPORT_IWARP:
2516 ret = cma_iw_listen(id_priv, backlog);
2525 cma_listen_on_all(id_priv);
2529 id_priv->backlog = 0;
2530 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2533 EXPORT_SYMBOL(rdma_listen);
2535 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2537 struct rdma_id_private *id_priv;
2540 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2541 addr->sa_family != AF_IB)
2542 return -EAFNOSUPPORT;
2544 id_priv = container_of(id, struct rdma_id_private, id);
2545 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2548 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2552 if (!cma_any_addr(addr)) {
2553 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
2557 ret = cma_acquire_dev(id_priv);
2562 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
2563 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2564 if (addr->sa_family == AF_INET)
2565 id_priv->afonly = 1;
2566 #if IS_ENABLED(CONFIG_IPV6)
2567 else if (addr->sa_family == AF_INET6)
2568 id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
2571 ret = cma_get_port(id_priv);
2577 if (id_priv->cma_dev)
2578 cma_release_dev(id_priv);
2580 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2583 EXPORT_SYMBOL(rdma_bind_addr);
2585 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
2587 struct cma_hdr *cma_hdr;
2590 cma_hdr->cma_version = CMA_VERSION;
2591 if (cma_family(id_priv) == AF_INET) {
2592 struct sockaddr_in *src4, *dst4;
2594 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
2595 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
2597 cma_set_ip_ver(cma_hdr, 4);
2598 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
2599 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
2600 cma_hdr->port = src4->sin_port;
2601 } else if (cma_family(id_priv) == AF_INET6) {
2602 struct sockaddr_in6 *src6, *dst6;
2604 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2605 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
2607 cma_set_ip_ver(cma_hdr, 6);
2608 cma_hdr->src_addr.ip6 = src6->sin6_addr;
2609 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
2610 cma_hdr->port = src6->sin6_port;
2615 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
2616 struct ib_cm_event *ib_event)
2618 struct rdma_id_private *id_priv = cm_id->context;
2619 struct rdma_cm_event event;
2620 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
2623 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
2626 memset(&event, 0, sizeof event);
2627 switch (ib_event->event) {
2628 case IB_CM_SIDR_REQ_ERROR:
2629 event.event = RDMA_CM_EVENT_UNREACHABLE;
2630 event.status = -ETIMEDOUT;
2632 case IB_CM_SIDR_REP_RECEIVED:
2633 event.param.ud.private_data = ib_event->private_data;
2634 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
2635 if (rep->status != IB_SIDR_SUCCESS) {
2636 event.event = RDMA_CM_EVENT_UNREACHABLE;
2637 event.status = ib_event->param.sidr_rep_rcvd.status;
2640 ret = cma_set_qkey(id_priv, rep->qkey);
2642 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2646 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
2647 id_priv->id.route.path_rec,
2648 &event.param.ud.ah_attr);
2649 event.param.ud.qp_num = rep->qpn;
2650 event.param.ud.qkey = rep->qkey;
2651 event.event = RDMA_CM_EVENT_ESTABLISHED;
2655 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
2660 ret = id_priv->id.event_handler(&id_priv->id, &event);
2662 /* Destroy the CM ID by returning a non-zero value. */
2663 id_priv->cm_id.ib = NULL;
2664 cma_exch(id_priv, RDMA_CM_DESTROYING);
2665 mutex_unlock(&id_priv->handler_mutex);
2666 rdma_destroy_id(&id_priv->id);
2670 mutex_unlock(&id_priv->handler_mutex);
2674 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
2675 struct rdma_conn_param *conn_param)
2677 struct ib_cm_sidr_req_param req;
2678 struct ib_cm_id *id;
2682 memset(&req, 0, sizeof req);
2683 offset = cma_user_data_offset(id_priv);
2684 req.private_data_len = offset + conn_param->private_data_len;
2685 if (req.private_data_len < conn_param->private_data_len)
2688 if (req.private_data_len) {
2689 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2693 private_data = NULL;
2696 if (conn_param->private_data && conn_param->private_data_len)
2697 memcpy(private_data + offset, conn_param->private_data,
2698 conn_param->private_data_len);
2701 ret = cma_format_hdr(private_data, id_priv);
2704 req.private_data = private_data;
2707 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
2713 id_priv->cm_id.ib = id;
2715 req.path = id_priv->id.route.path_rec;
2716 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2717 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
2718 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2720 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
2722 ib_destroy_cm_id(id_priv->cm_id.ib);
2723 id_priv->cm_id.ib = NULL;
2726 kfree(private_data);
2730 static int cma_connect_ib(struct rdma_id_private *id_priv,
2731 struct rdma_conn_param *conn_param)
2733 struct ib_cm_req_param req;
2734 struct rdma_route *route;
2736 struct ib_cm_id *id;
2739 memset(&req, 0, sizeof req);
2740 offset = cma_user_data_offset(id_priv);
2741 req.private_data_len = offset + conn_param->private_data_len;
2742 if (req.private_data_len < conn_param->private_data_len)
2745 if (req.private_data_len) {
2746 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
2750 private_data = NULL;
2753 if (conn_param->private_data && conn_param->private_data_len)
2754 memcpy(private_data + offset, conn_param->private_data,
2755 conn_param->private_data_len);
2757 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
2762 id_priv->cm_id.ib = id;
2764 route = &id_priv->id.route;
2766 ret = cma_format_hdr(private_data, id_priv);
2769 req.private_data = private_data;
2772 req.primary_path = &route->path_rec[0];
2773 if (route->num_paths == 2)
2774 req.alternate_path = &route->path_rec[1];
2776 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2777 req.qp_num = id_priv->qp_num;
2778 req.qp_type = id_priv->id.qp_type;
2779 req.starting_psn = id_priv->seq_num;
2780 req.responder_resources = conn_param->responder_resources;
2781 req.initiator_depth = conn_param->initiator_depth;
2782 req.flow_control = conn_param->flow_control;
2783 req.retry_count = min_t(u8, 7, conn_param->retry_count);
2784 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2785 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2786 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
2787 req.max_cm_retries = CMA_MAX_CM_RETRIES;
2788 req.srq = id_priv->srq ? 1 : 0;
2790 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
2792 if (ret && !IS_ERR(id)) {
2793 ib_destroy_cm_id(id);
2794 id_priv->cm_id.ib = NULL;
2797 kfree(private_data);
2801 static int cma_connect_iw(struct rdma_id_private *id_priv,
2802 struct rdma_conn_param *conn_param)
2804 struct iw_cm_id *cm_id;
2805 struct sockaddr_in* sin;
2807 struct iw_cm_conn_param iw_param;
2809 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
2811 return PTR_ERR(cm_id);
2813 id_priv->cm_id.iw = cm_id;
2815 sin = (struct sockaddr_in *) cma_src_addr(id_priv);
2816 cm_id->local_addr = *sin;
2818 sin = (struct sockaddr_in *) cma_dst_addr(id_priv);
2819 cm_id->remote_addr = *sin;
2821 ret = cma_modify_qp_rtr(id_priv, conn_param);
2826 iw_param.ord = conn_param->initiator_depth;
2827 iw_param.ird = conn_param->responder_resources;
2828 iw_param.private_data = conn_param->private_data;
2829 iw_param.private_data_len = conn_param->private_data_len;
2830 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
2832 memset(&iw_param, 0, sizeof iw_param);
2833 iw_param.qpn = id_priv->qp_num;
2835 ret = iw_cm_connect(cm_id, &iw_param);
2838 iw_destroy_cm_id(cm_id);
2839 id_priv->cm_id.iw = NULL;
2844 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2846 struct rdma_id_private *id_priv;
2849 id_priv = container_of(id, struct rdma_id_private, id);
2850 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
2854 id_priv->qp_num = conn_param->qp_num;
2855 id_priv->srq = conn_param->srq;
2858 switch (rdma_node_get_transport(id->device->node_type)) {
2859 case RDMA_TRANSPORT_IB:
2860 if (id->qp_type == IB_QPT_UD)
2861 ret = cma_resolve_ib_udp(id_priv, conn_param);
2863 ret = cma_connect_ib(id_priv, conn_param);
2865 case RDMA_TRANSPORT_IWARP:
2866 ret = cma_connect_iw(id_priv, conn_param);
2877 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
2880 EXPORT_SYMBOL(rdma_connect);
2882 static int cma_accept_ib(struct rdma_id_private *id_priv,
2883 struct rdma_conn_param *conn_param)
2885 struct ib_cm_rep_param rep;
2888 ret = cma_modify_qp_rtr(id_priv, conn_param);
2892 ret = cma_modify_qp_rts(id_priv, conn_param);
2896 memset(&rep, 0, sizeof rep);
2897 rep.qp_num = id_priv->qp_num;
2898 rep.starting_psn = id_priv->seq_num;
2899 rep.private_data = conn_param->private_data;
2900 rep.private_data_len = conn_param->private_data_len;
2901 rep.responder_resources = conn_param->responder_resources;
2902 rep.initiator_depth = conn_param->initiator_depth;
2903 rep.failover_accepted = 0;
2904 rep.flow_control = conn_param->flow_control;
2905 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
2906 rep.srq = id_priv->srq ? 1 : 0;
2908 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
2913 static int cma_accept_iw(struct rdma_id_private *id_priv,
2914 struct rdma_conn_param *conn_param)
2916 struct iw_cm_conn_param iw_param;
2919 ret = cma_modify_qp_rtr(id_priv, conn_param);
2923 iw_param.ord = conn_param->initiator_depth;
2924 iw_param.ird = conn_param->responder_resources;
2925 iw_param.private_data = conn_param->private_data;
2926 iw_param.private_data_len = conn_param->private_data_len;
2927 if (id_priv->id.qp) {
2928 iw_param.qpn = id_priv->qp_num;
2930 iw_param.qpn = conn_param->qp_num;
2932 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
2935 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
2936 enum ib_cm_sidr_status status, u32 qkey,
2937 const void *private_data, int private_data_len)
2939 struct ib_cm_sidr_rep_param rep;
2942 memset(&rep, 0, sizeof rep);
2943 rep.status = status;
2944 if (status == IB_SIDR_SUCCESS) {
2945 ret = cma_set_qkey(id_priv, qkey);
2948 rep.qp_num = id_priv->qp_num;
2949 rep.qkey = id_priv->qkey;
2951 rep.private_data = private_data;
2952 rep.private_data_len = private_data_len;
2954 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
2957 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
2959 struct rdma_id_private *id_priv;
2962 id_priv = container_of(id, struct rdma_id_private, id);
2964 id_priv->owner = task_pid_nr(current);
2966 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
2969 if (!id->qp && conn_param) {
2970 id_priv->qp_num = conn_param->qp_num;
2971 id_priv->srq = conn_param->srq;
2974 switch (rdma_node_get_transport(id->device->node_type)) {
2975 case RDMA_TRANSPORT_IB:
2976 if (id->qp_type == IB_QPT_UD) {
2978 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2980 conn_param->private_data,
2981 conn_param->private_data_len);
2983 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
2987 ret = cma_accept_ib(id_priv, conn_param);
2989 ret = cma_rep_recv(id_priv);
2992 case RDMA_TRANSPORT_IWARP:
2993 ret = cma_accept_iw(id_priv, conn_param);
3005 cma_modify_qp_err(id_priv);
3006 rdma_reject(id, NULL, 0);
3009 EXPORT_SYMBOL(rdma_accept);
3011 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3013 struct rdma_id_private *id_priv;
3016 id_priv = container_of(id, struct rdma_id_private, id);
3017 if (!id_priv->cm_id.ib)
3020 switch (id->device->node_type) {
3021 case RDMA_NODE_IB_CA:
3022 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3030 EXPORT_SYMBOL(rdma_notify);
3032 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3033 u8 private_data_len)
3035 struct rdma_id_private *id_priv;
3038 id_priv = container_of(id, struct rdma_id_private, id);
3039 if (!id_priv->cm_id.ib)
3042 switch (rdma_node_get_transport(id->device->node_type)) {
3043 case RDMA_TRANSPORT_IB:
3044 if (id->qp_type == IB_QPT_UD)
3045 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3046 private_data, private_data_len);
3048 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3049 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3050 0, private_data, private_data_len);
3052 case RDMA_TRANSPORT_IWARP:
3053 ret = iw_cm_reject(id_priv->cm_id.iw,
3054 private_data, private_data_len);
3062 EXPORT_SYMBOL(rdma_reject);
3064 int rdma_disconnect(struct rdma_cm_id *id)
3066 struct rdma_id_private *id_priv;
3069 id_priv = container_of(id, struct rdma_id_private, id);
3070 if (!id_priv->cm_id.ib)
3073 switch (rdma_node_get_transport(id->device->node_type)) {
3074 case RDMA_TRANSPORT_IB:
3075 ret = cma_modify_qp_err(id_priv);
3078 /* Initiate or respond to a disconnect. */
3079 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3080 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3082 case RDMA_TRANSPORT_IWARP:
3083 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3092 EXPORT_SYMBOL(rdma_disconnect);
3094 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3096 struct rdma_id_private *id_priv;
3097 struct cma_multicast *mc = multicast->context;
3098 struct rdma_cm_event event;
3101 id_priv = mc->id_priv;
3102 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3103 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
3107 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3108 mutex_lock(&id_priv->qp_mutex);
3109 if (!status && id_priv->id.qp)
3110 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3111 be16_to_cpu(multicast->rec.mlid));
3112 mutex_unlock(&id_priv->qp_mutex);
3114 memset(&event, 0, sizeof event);
3115 event.status = status;
3116 event.param.ud.private_data = mc->context;
3118 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3119 ib_init_ah_from_mcmember(id_priv->id.device,
3120 id_priv->id.port_num, &multicast->rec,
3121 &event.param.ud.ah_attr);
3122 event.param.ud.qp_num = 0xFFFFFF;
3123 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3125 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3127 ret = id_priv->id.event_handler(&id_priv->id, &event);
3129 cma_exch(id_priv, RDMA_CM_DESTROYING);
3130 mutex_unlock(&id_priv->handler_mutex);
3131 rdma_destroy_id(&id_priv->id);
3135 mutex_unlock(&id_priv->handler_mutex);
3139 static void cma_set_mgid(struct rdma_id_private *id_priv,
3140 struct sockaddr *addr, union ib_gid *mgid)
3142 unsigned char mc_map[MAX_ADDR_LEN];
3143 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3144 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3145 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3147 if (cma_any_addr(addr)) {
3148 memset(mgid, 0, sizeof *mgid);
3149 } else if ((addr->sa_family == AF_INET6) &&
3150 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3152 /* IPv6 address is an SA assigned MGID. */
3153 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3154 } else if (addr->sa_family == AF_IB) {
3155 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3156 } else if ((addr->sa_family == AF_INET6)) {
3157 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3158 if (id_priv->id.ps == RDMA_PS_UDP)
3159 mc_map[7] = 0x01; /* Use RDMA CM signature */
3160 *mgid = *(union ib_gid *) (mc_map + 4);
3162 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3163 if (id_priv->id.ps == RDMA_PS_UDP)
3164 mc_map[7] = 0x01; /* Use RDMA CM signature */
3165 *mgid = *(union ib_gid *) (mc_map + 4);
3169 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3170 struct cma_multicast *mc)
3172 struct ib_sa_mcmember_rec rec;
3173 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3174 ib_sa_comp_mask comp_mask;
3177 ib_addr_get_mgid(dev_addr, &rec.mgid);
3178 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3183 ret = cma_set_qkey(id_priv, 0);
3187 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3188 rec.qkey = cpu_to_be32(id_priv->qkey);
3189 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3190 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3193 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3194 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3195 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3196 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3197 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3199 if (id_priv->id.ps == RDMA_PS_IPOIB)
3200 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3201 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3202 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3203 IB_SA_MCMEMBER_REC_MTU |
3204 IB_SA_MCMEMBER_REC_HOP_LIMIT;
3206 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3207 id_priv->id.port_num, &rec,
3208 comp_mask, GFP_KERNEL,
3209 cma_ib_mc_handler, mc);
3210 return PTR_RET(mc->multicast.ib);
3213 static void iboe_mcast_work_handler(struct work_struct *work)
3215 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3216 struct cma_multicast *mc = mw->mc;
3217 struct ib_sa_multicast *m = mc->multicast.ib;
3219 mc->multicast.ib->context = mc;
3220 cma_ib_mc_handler(0, m);
3221 kref_put(&mc->mcref, release_mc);
3225 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3227 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3228 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3230 if (cma_any_addr(addr)) {
3231 memset(mgid, 0, sizeof *mgid);
3232 } else if (addr->sa_family == AF_INET6) {
3233 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3235 mgid->raw[0] = 0xff;
3236 mgid->raw[1] = 0x0e;
3245 mgid->raw[10] = 0xff;
3246 mgid->raw[11] = 0xff;
3247 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3251 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3252 struct cma_multicast *mc)
3254 struct iboe_mcast_work *work;
3255 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3257 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3258 struct net_device *ndev = NULL;
3260 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3263 work = kzalloc(sizeof *work, GFP_KERNEL);
3267 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3268 if (!mc->multicast.ib) {
3273 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3275 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3276 if (id_priv->id.ps == RDMA_PS_UDP)
3277 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3279 if (dev_addr->bound_dev_if)
3280 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3285 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3286 mc->multicast.ib->rec.hop_limit = 1;
3287 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3289 if (!mc->multicast.ib->rec.mtu) {
3293 iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
3296 INIT_WORK(&work->work, iboe_mcast_work_handler);
3297 kref_get(&mc->mcref);
3298 queue_work(cma_wq, &work->work);
3303 kfree(mc->multicast.ib);
3309 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3312 struct rdma_id_private *id_priv;
3313 struct cma_multicast *mc;
3316 id_priv = container_of(id, struct rdma_id_private, id);
3317 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3318 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3321 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3325 memcpy(&mc->addr, addr, rdma_addr_size(addr));
3326 mc->context = context;
3327 mc->id_priv = id_priv;
3329 spin_lock(&id_priv->lock);
3330 list_add(&mc->list, &id_priv->mc_list);
3331 spin_unlock(&id_priv->lock);
3333 switch (rdma_node_get_transport(id->device->node_type)) {
3334 case RDMA_TRANSPORT_IB:
3335 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3336 case IB_LINK_LAYER_INFINIBAND:
3337 ret = cma_join_ib_multicast(id_priv, mc);
3339 case IB_LINK_LAYER_ETHERNET:
3340 kref_init(&mc->mcref);
3341 ret = cma_iboe_join_multicast(id_priv, mc);
3353 spin_lock_irq(&id_priv->lock);
3354 list_del(&mc->list);
3355 spin_unlock_irq(&id_priv->lock);
3360 EXPORT_SYMBOL(rdma_join_multicast);
3362 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3364 struct rdma_id_private *id_priv;
3365 struct cma_multicast *mc;
3367 id_priv = container_of(id, struct rdma_id_private, id);
3368 spin_lock_irq(&id_priv->lock);
3369 list_for_each_entry(mc, &id_priv->mc_list, list) {
3370 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
3371 list_del(&mc->list);
3372 spin_unlock_irq(&id_priv->lock);
3375 ib_detach_mcast(id->qp,
3376 &mc->multicast.ib->rec.mgid,
3377 be16_to_cpu(mc->multicast.ib->rec.mlid));
3378 if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
3379 switch (rdma_port_get_link_layer(id->device, id->port_num)) {
3380 case IB_LINK_LAYER_INFINIBAND:
3381 ib_sa_free_multicast(mc->multicast.ib);
3384 case IB_LINK_LAYER_ETHERNET:
3385 kref_put(&mc->mcref, release_mc);
3394 spin_unlock_irq(&id_priv->lock);
3396 EXPORT_SYMBOL(rdma_leave_multicast);
3398 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3400 struct rdma_dev_addr *dev_addr;
3401 struct cma_ndev_work *work;
3403 dev_addr = &id_priv->id.route.addr.dev_addr;
3405 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3406 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3407 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3408 ndev->name, &id_priv->id);
3409 work = kzalloc(sizeof *work, GFP_KERNEL);
3413 INIT_WORK(&work->work, cma_ndev_work_handler);
3415 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3416 atomic_inc(&id_priv->refcount);
3417 queue_work(cma_wq, &work->work);
3423 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3426 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
3427 struct cma_device *cma_dev;
3428 struct rdma_id_private *id_priv;
3429 int ret = NOTIFY_DONE;
3431 if (dev_net(ndev) != &init_net)
3434 if (event != NETDEV_BONDING_FAILOVER)
3437 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3441 list_for_each_entry(cma_dev, &dev_list, list)
3442 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3443 ret = cma_netdev_change(ndev, id_priv);
3449 mutex_unlock(&lock);
3453 static struct notifier_block cma_nb = {
3454 .notifier_call = cma_netdev_callback
3457 static void cma_add_one(struct ib_device *device)
3459 struct cma_device *cma_dev;
3460 struct rdma_id_private *id_priv;
3462 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3466 cma_dev->device = device;
3468 init_completion(&cma_dev->comp);
3469 atomic_set(&cma_dev->refcount, 1);
3470 INIT_LIST_HEAD(&cma_dev->id_list);
3471 ib_set_client_data(device, &cma_client, cma_dev);
3474 list_add_tail(&cma_dev->list, &dev_list);
3475 list_for_each_entry(id_priv, &listen_any_list, list)
3476 cma_listen_on_dev(id_priv, cma_dev);
3477 mutex_unlock(&lock);
3480 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3482 struct rdma_cm_event event;
3483 enum rdma_cm_state state;
3486 /* Record that we want to remove the device */
3487 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3488 if (state == RDMA_CM_DESTROYING)
3491 cma_cancel_operation(id_priv, state);
3492 mutex_lock(&id_priv->handler_mutex);
3494 /* Check for destruction from another callback. */
3495 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3498 memset(&event, 0, sizeof event);
3499 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3500 ret = id_priv->id.event_handler(&id_priv->id, &event);
3502 mutex_unlock(&id_priv->handler_mutex);
3506 static void cma_process_remove(struct cma_device *cma_dev)
3508 struct rdma_id_private *id_priv;
3512 while (!list_empty(&cma_dev->id_list)) {
3513 id_priv = list_entry(cma_dev->id_list.next,
3514 struct rdma_id_private, list);
3516 list_del(&id_priv->listen_list);
3517 list_del_init(&id_priv->list);
3518 atomic_inc(&id_priv->refcount);
3519 mutex_unlock(&lock);
3521 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3522 cma_deref_id(id_priv);
3524 rdma_destroy_id(&id_priv->id);
3528 mutex_unlock(&lock);
3530 cma_deref_dev(cma_dev);
3531 wait_for_completion(&cma_dev->comp);
3534 static void cma_remove_one(struct ib_device *device)
3536 struct cma_device *cma_dev;
3538 cma_dev = ib_get_client_data(device, &cma_client);
3543 list_del(&cma_dev->list);
3544 mutex_unlock(&lock);
3546 cma_process_remove(cma_dev);
3550 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3552 struct nlmsghdr *nlh;
3553 struct rdma_cm_id_stats *id_stats;
3554 struct rdma_id_private *id_priv;
3555 struct rdma_cm_id *id = NULL;
3556 struct cma_device *cma_dev;
3557 int i_dev = 0, i_id = 0;
3560 * We export all of the IDs as a sequence of messages. Each
3561 * ID gets its own netlink message.
3565 list_for_each_entry(cma_dev, &dev_list, list) {
3566 if (i_dev < cb->args[0]) {
3572 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3573 if (i_id < cb->args[1]) {
3578 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3579 sizeof *id_stats, RDMA_NL_RDMA_CM,
3580 RDMA_NL_RDMA_CM_ID_STATS);
3584 memset(id_stats, 0, sizeof *id_stats);
3586 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3587 id_stats->port_num = id->port_num;
3588 id_stats->bound_dev_if =
3589 id->route.addr.dev_addr.bound_dev_if;
3591 if (ibnl_put_attr(skb, nlh,
3592 rdma_addr_size(cma_src_addr(id_priv)),
3593 cma_src_addr(id_priv),
3594 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3596 if (ibnl_put_attr(skb, nlh,
3597 rdma_addr_size(cma_src_addr(id_priv)),
3598 cma_dst_addr(id_priv),
3599 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3602 id_stats->pid = id_priv->owner;
3603 id_stats->port_space = id->ps;
3604 id_stats->cm_state = id_priv->state;
3605 id_stats->qp_num = id_priv->qp_num;
3606 id_stats->qp_type = id->qp_type;
3616 mutex_unlock(&lock);
3617 cb->args[0] = i_dev;
3623 static const struct ibnl_client_cbs cma_cb_table[] = {
3624 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3625 .module = THIS_MODULE },
3628 static int __init cma_init(void)
3632 cma_wq = create_singlethread_workqueue("rdma_cm");
3636 ib_sa_register_client(&sa_client);
3637 rdma_addr_register_client(&addr_client);
3638 register_netdevice_notifier(&cma_nb);
3640 ret = ib_register_client(&cma_client);
3644 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
3645 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
3650 unregister_netdevice_notifier(&cma_nb);
3651 rdma_addr_unregister_client(&addr_client);
3652 ib_sa_unregister_client(&sa_client);
3653 destroy_workqueue(cma_wq);
3657 static void __exit cma_cleanup(void)
3659 ibnl_remove_client(RDMA_NL_RDMA_CM);
3660 ib_unregister_client(&cma_client);
3661 unregister_netdevice_notifier(&cma_nb);
3662 rdma_addr_unregister_client(&addr_client);
3663 ib_sa_unregister_client(&sa_client);
3664 destroy_workqueue(cma_wq);
3665 idr_destroy(&tcp_ps);
3666 idr_destroy(&udp_ps);
3667 idr_destroy(&ipoib_ps);
3668 idr_destroy(&ib_ps);
3671 module_init(cma_init);
3672 module_exit(cma_cleanup);