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 #define LINUXKPI_PARAM_PREFIX ibcore_
38 #include <linux/completion.h>
40 #include <linux/in6.h>
41 #include <linux/mutex.h>
42 #include <linux/random.h>
43 #include <linux/idr.h>
44 #include <linux/inetdevice.h>
45 #include <linux/slab.h>
46 #include <linux/module.h>
47 #include <net/route.h>
52 #include <netinet6/scope6_var.h>
53 #include <netinet6/ip6_var.h>
55 #include <rdma/rdma_cm.h>
56 #include <rdma/rdma_cm_ib.h>
58 #include <rdma/ib_addr.h>
59 #include <rdma/ib_cache.h>
60 #include <rdma/ib_cm.h>
61 #include <rdma/ib_sa.h>
62 #include <rdma/iw_cm.h>
66 #include "core_priv.h"
68 MODULE_AUTHOR("Sean Hefty");
69 MODULE_DESCRIPTION("Generic RDMA CM Agent");
70 MODULE_LICENSE("Dual BSD/GPL");
72 #define CMA_CM_RESPONSE_TIMEOUT 20
73 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
74 #define CMA_MAX_CM_RETRIES 15
75 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
76 #define CMA_IBOE_PACKET_LIFETIME 18
78 static const char * const cma_events[] = {
79 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
80 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
81 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
82 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
83 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
84 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
85 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
86 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
87 [RDMA_CM_EVENT_REJECTED] = "rejected",
88 [RDMA_CM_EVENT_ESTABLISHED] = "established",
89 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
90 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
91 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
92 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
93 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
94 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
97 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
101 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
102 cma_events[index] : "unrecognized event";
104 EXPORT_SYMBOL(rdma_event_msg);
106 static void cma_add_one(struct ib_device *device);
107 static void cma_remove_one(struct ib_device *device, void *client_data);
109 static struct ib_client cma_client = {
112 .remove = cma_remove_one
115 static struct ib_sa_client sa_client;
116 static struct rdma_addr_client addr_client;
117 static LIST_HEAD(dev_list);
118 static LIST_HEAD(listen_any_list);
119 static DEFINE_MUTEX(lock);
120 static struct workqueue_struct *cma_wq;
129 VNET_DEFINE(struct cma_pernet, cma_pernet);
131 static struct cma_pernet *cma_pernet_ptr(struct vnet *vnet)
133 struct cma_pernet *retval;
135 CURVNET_SET_QUIET(vnet);
136 retval = &VNET(cma_pernet);
142 static struct idr *cma_pernet_idr(struct vnet *net, enum rdma_port_space ps)
144 struct cma_pernet *pernet = cma_pernet_ptr(net);
148 return &pernet->tcp_ps;
150 return &pernet->udp_ps;
152 return &pernet->ipoib_ps;
154 return &pernet->ib_ps;
161 struct list_head list;
162 struct ib_device *device;
163 struct completion comp;
165 struct list_head id_list;
166 struct sysctl_ctx_list sysctl_ctx;
167 enum ib_gid_type *default_gid_type;
170 struct rdma_bind_list {
171 enum rdma_port_space ps;
172 struct hlist_head owners;
176 struct class_port_info_context {
177 struct ib_class_port_info *class_port_info;
178 struct ib_device *device;
179 struct completion done;
180 struct ib_sa_query *sa_query;
184 static int cma_ps_alloc(struct vnet *vnet, enum rdma_port_space ps,
185 struct rdma_bind_list *bind_list, int snum)
187 struct idr *idr = cma_pernet_idr(vnet, ps);
189 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
192 static struct rdma_bind_list *cma_ps_find(struct vnet *net,
193 enum rdma_port_space ps, int snum)
195 struct idr *idr = cma_pernet_idr(net, ps);
197 return idr_find(idr, snum);
200 static void cma_ps_remove(struct vnet *net, enum rdma_port_space ps, int snum)
202 struct idr *idr = cma_pernet_idr(net, ps);
204 idr_remove(idr, snum);
211 void cma_ref_dev(struct cma_device *cma_dev)
213 atomic_inc(&cma_dev->refcount);
216 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
219 struct cma_device *cma_dev;
220 struct cma_device *found_cma_dev = NULL;
224 list_for_each_entry(cma_dev, &dev_list, list)
225 if (filter(cma_dev->device, cookie)) {
226 found_cma_dev = cma_dev;
231 cma_ref_dev(found_cma_dev);
233 return found_cma_dev;
236 int cma_get_default_gid_type(struct cma_device *cma_dev,
239 if (port < rdma_start_port(cma_dev->device) ||
240 port > rdma_end_port(cma_dev->device))
243 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
246 int cma_set_default_gid_type(struct cma_device *cma_dev,
248 enum ib_gid_type default_gid_type)
250 unsigned long supported_gids;
252 if (port < rdma_start_port(cma_dev->device) ||
253 port > rdma_end_port(cma_dev->device))
256 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
258 if (!(supported_gids & 1 << default_gid_type))
261 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
267 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
269 return cma_dev->device;
273 * Device removal can occur at anytime, so we need extra handling to
274 * serialize notifying the user of device removal with other callbacks.
275 * We do this by disabling removal notification while a callback is in process,
276 * and reporting it after the callback completes.
278 struct rdma_id_private {
279 struct rdma_cm_id id;
281 struct rdma_bind_list *bind_list;
282 struct hlist_node node;
283 struct list_head list; /* listen_any_list or cma_device.list */
284 struct list_head listen_list; /* per device listens */
285 struct cma_device *cma_dev;
286 struct list_head mc_list;
289 enum rdma_cm_state state;
291 struct mutex qp_mutex;
293 struct completion comp;
295 struct mutex handler_mutex;
299 struct ib_sa_query *query;
315 enum ib_gid_type gid_type;
318 struct cma_multicast {
319 struct rdma_id_private *id_priv;
321 struct ib_sa_multicast *ib;
323 struct list_head list;
325 struct sockaddr_storage addr;
332 struct work_struct work;
333 struct rdma_id_private *id;
334 enum rdma_cm_state old_state;
335 enum rdma_cm_state new_state;
336 struct rdma_cm_event event;
339 struct cma_ndev_work {
340 struct work_struct work;
341 struct rdma_id_private *id;
342 struct rdma_cm_event event;
345 struct iboe_mcast_work {
346 struct work_struct work;
347 struct rdma_id_private *id;
348 struct cma_multicast *mc;
361 u8 ip_version; /* IP version: 7:4 */
363 union cma_ip_addr src_addr;
364 union cma_ip_addr dst_addr;
367 #define CMA_VERSION 0x00
369 struct cma_req_info {
370 struct ib_device *device;
372 union ib_gid local_gid;
378 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
383 spin_lock_irqsave(&id_priv->lock, flags);
384 ret = (id_priv->state == comp);
385 spin_unlock_irqrestore(&id_priv->lock, flags);
389 static int cma_comp_exch(struct rdma_id_private *id_priv,
390 enum rdma_cm_state comp, enum rdma_cm_state exch)
395 spin_lock_irqsave(&id_priv->lock, flags);
396 if ((ret = (id_priv->state == comp)))
397 id_priv->state = exch;
398 spin_unlock_irqrestore(&id_priv->lock, flags);
402 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
403 enum rdma_cm_state exch)
406 enum rdma_cm_state old;
408 spin_lock_irqsave(&id_priv->lock, flags);
409 old = id_priv->state;
410 id_priv->state = exch;
411 spin_unlock_irqrestore(&id_priv->lock, flags);
415 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
417 return hdr->ip_version >> 4;
420 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
422 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
425 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
426 struct cma_device *cma_dev)
428 cma_ref_dev(cma_dev);
429 id_priv->cma_dev = cma_dev;
430 id_priv->gid_type = 0;
431 id_priv->id.device = cma_dev->device;
432 id_priv->id.route.addr.dev_addr.transport =
433 rdma_node_get_transport(cma_dev->device->node_type);
434 list_add_tail(&id_priv->list, &cma_dev->id_list);
437 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
438 struct cma_device *cma_dev)
440 _cma_attach_to_dev(id_priv, cma_dev);
442 cma_dev->default_gid_type[id_priv->id.port_num -
443 rdma_start_port(cma_dev->device)];
446 void cma_deref_dev(struct cma_device *cma_dev)
448 if (atomic_dec_and_test(&cma_dev->refcount))
449 complete(&cma_dev->comp);
452 static inline void release_mc(struct kref *kref)
454 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
456 kfree(mc->multicast.ib);
460 static void cma_release_dev(struct rdma_id_private *id_priv)
463 list_del(&id_priv->list);
464 cma_deref_dev(id_priv->cma_dev);
465 id_priv->cma_dev = NULL;
469 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
471 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
474 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
476 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
479 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
481 return id_priv->id.route.addr.src_addr.ss_family;
484 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
486 struct ib_sa_mcmember_rec rec;
490 if (qkey && id_priv->qkey != qkey)
496 id_priv->qkey = qkey;
500 switch (id_priv->id.ps) {
503 id_priv->qkey = RDMA_UDP_QKEY;
506 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
507 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
508 id_priv->id.port_num, &rec.mgid,
511 id_priv->qkey = be32_to_cpu(rec.qkey);
519 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
521 dev_addr->dev_type = ARPHRD_INFINIBAND;
522 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
523 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
526 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
530 if (addr->sa_family != AF_IB) {
531 ret = rdma_translate_ip(addr, dev_addr, NULL);
533 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
540 static inline int cma_validate_port(struct ib_device *device, u8 port,
541 enum ib_gid_type gid_type,
542 union ib_gid *gid, int dev_type,
547 struct net_device *ndev = NULL;
549 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
552 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
555 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
556 ndev = dev_get_by_index(net, bound_if_index);
557 if (ndev && ndev->if_flags & IFF_LOOPBACK) {
558 pr_info("detected loopback device\n");
561 if (!device->get_netdev)
564 ndev = device->get_netdev(device, port);
569 gid_type = IB_GID_TYPE_IB;
572 ret = ib_find_cached_gid_by_port(device, gid, gid_type, port,
581 static int cma_acquire_dev(struct rdma_id_private *id_priv,
582 struct rdma_id_private *listen_id_priv)
584 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
585 struct cma_device *cma_dev;
586 union ib_gid gid, iboe_gid, *gidp;
590 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
591 id_priv->id.ps == RDMA_PS_IPOIB)
595 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
598 memcpy(&gid, dev_addr->src_dev_addr +
599 rdma_addr_gid_offset(dev_addr), sizeof gid);
601 if (listen_id_priv) {
602 cma_dev = listen_id_priv->cma_dev;
603 port = listen_id_priv->id.port_num;
604 gidp = rdma_protocol_roce(cma_dev->device, port) ?
607 ret = cma_validate_port(cma_dev->device, port,
608 rdma_protocol_ib(cma_dev->device, port) ?
610 listen_id_priv->gid_type, gidp,
613 dev_addr->bound_dev_if);
615 id_priv->id.port_num = port;
620 list_for_each_entry(cma_dev, &dev_list, list) {
621 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
622 if (listen_id_priv &&
623 listen_id_priv->cma_dev == cma_dev &&
624 listen_id_priv->id.port_num == port)
627 gidp = rdma_protocol_roce(cma_dev->device, port) ?
630 ret = cma_validate_port(cma_dev->device, port,
631 rdma_protocol_ib(cma_dev->device, port) ?
633 cma_dev->default_gid_type[port - 1],
634 gidp, dev_addr->dev_type,
636 dev_addr->bound_dev_if);
638 id_priv->id.port_num = port;
646 cma_attach_to_dev(id_priv, cma_dev);
653 * Select the source IB device and address to reach the destination IB address.
655 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
657 struct cma_device *cma_dev, *cur_dev;
658 struct sockaddr_ib *addr;
659 union ib_gid gid, sgid, *dgid;
665 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
666 dgid = (union ib_gid *) &addr->sib_addr;
667 pkey = ntohs(addr->sib_pkey);
669 list_for_each_entry(cur_dev, &dev_list, list) {
670 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
671 if (!rdma_cap_af_ib(cur_dev->device, p))
674 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
677 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i,
680 if (!memcmp(&gid, dgid, sizeof(gid))) {
683 id_priv->id.port_num = p;
687 if (!cma_dev && (gid.global.subnet_prefix ==
688 dgid->global.subnet_prefix)) {
691 id_priv->id.port_num = p;
701 cma_attach_to_dev(id_priv, cma_dev);
702 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
703 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
704 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
708 static void cma_deref_id(struct rdma_id_private *id_priv)
710 if (atomic_dec_and_test(&id_priv->refcount))
711 complete(&id_priv->comp);
714 struct rdma_cm_id *rdma_create_id(struct vnet *net,
715 rdma_cm_event_handler event_handler,
716 void *context, enum rdma_port_space ps,
717 enum ib_qp_type qp_type)
719 struct rdma_id_private *id_priv;
721 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
723 return ERR_PTR(-ENOMEM);
725 id_priv->owner = task_pid_nr(current);
726 id_priv->state = RDMA_CM_IDLE;
727 id_priv->id.context = context;
728 id_priv->id.event_handler = event_handler;
730 id_priv->id.qp_type = qp_type;
731 spin_lock_init(&id_priv->lock);
732 mutex_init(&id_priv->qp_mutex);
733 init_completion(&id_priv->comp);
734 atomic_set(&id_priv->refcount, 1);
735 mutex_init(&id_priv->handler_mutex);
736 INIT_LIST_HEAD(&id_priv->listen_list);
737 INIT_LIST_HEAD(&id_priv->mc_list);
738 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
739 id_priv->id.route.addr.dev_addr.net = TD_TO_VNET(curthread);
743 EXPORT_SYMBOL(rdma_create_id);
745 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
747 struct ib_qp_attr qp_attr;
748 int qp_attr_mask, ret;
750 qp_attr.qp_state = IB_QPS_INIT;
751 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
755 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
759 qp_attr.qp_state = IB_QPS_RTR;
760 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
764 qp_attr.qp_state = IB_QPS_RTS;
766 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
771 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
773 struct ib_qp_attr qp_attr;
774 int qp_attr_mask, ret;
776 qp_attr.qp_state = IB_QPS_INIT;
777 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
781 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
784 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
785 struct ib_qp_init_attr *qp_init_attr)
787 struct rdma_id_private *id_priv;
791 id_priv = container_of(id, struct rdma_id_private, id);
792 if (id->device != pd->device)
795 qp_init_attr->port_num = id->port_num;
796 qp = ib_create_qp(pd, qp_init_attr);
800 if (id->qp_type == IB_QPT_UD)
801 ret = cma_init_ud_qp(id_priv, qp);
803 ret = cma_init_conn_qp(id_priv, qp);
808 id_priv->qp_num = qp->qp_num;
809 id_priv->srq = (qp->srq != NULL);
815 EXPORT_SYMBOL(rdma_create_qp);
817 void rdma_destroy_qp(struct rdma_cm_id *id)
819 struct rdma_id_private *id_priv;
821 id_priv = container_of(id, struct rdma_id_private, id);
822 mutex_lock(&id_priv->qp_mutex);
823 ib_destroy_qp(id_priv->id.qp);
824 id_priv->id.qp = NULL;
825 mutex_unlock(&id_priv->qp_mutex);
827 EXPORT_SYMBOL(rdma_destroy_qp);
829 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
830 struct rdma_conn_param *conn_param)
832 struct ib_qp_attr qp_attr;
833 int qp_attr_mask, ret;
836 mutex_lock(&id_priv->qp_mutex);
837 if (!id_priv->id.qp) {
842 /* Need to update QP attributes from default values. */
843 qp_attr.qp_state = IB_QPS_INIT;
844 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
848 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
852 qp_attr.qp_state = IB_QPS_RTR;
853 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
857 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
858 qp_attr.ah_attr.grh.sgid_index, &sgid, NULL);
862 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
865 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
866 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
868 mutex_unlock(&id_priv->qp_mutex);
872 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
873 struct rdma_conn_param *conn_param)
875 struct ib_qp_attr qp_attr;
876 int qp_attr_mask, ret;
878 mutex_lock(&id_priv->qp_mutex);
879 if (!id_priv->id.qp) {
884 qp_attr.qp_state = IB_QPS_RTS;
885 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
890 qp_attr.max_rd_atomic = conn_param->initiator_depth;
891 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
893 mutex_unlock(&id_priv->qp_mutex);
897 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
899 struct ib_qp_attr qp_attr;
902 mutex_lock(&id_priv->qp_mutex);
903 if (!id_priv->id.qp) {
908 qp_attr.qp_state = IB_QPS_ERR;
909 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
911 mutex_unlock(&id_priv->qp_mutex);
915 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
916 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
918 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
922 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
925 pkey = ib_addr_get_pkey(dev_addr);
927 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
928 pkey, &qp_attr->pkey_index);
932 qp_attr->port_num = id_priv->id.port_num;
933 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
935 if (id_priv->id.qp_type == IB_QPT_UD) {
936 ret = cma_set_qkey(id_priv, 0);
940 qp_attr->qkey = id_priv->qkey;
941 *qp_attr_mask |= IB_QP_QKEY;
943 qp_attr->qp_access_flags = 0;
944 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
949 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
952 struct rdma_id_private *id_priv;
955 id_priv = container_of(id, struct rdma_id_private, id);
956 if (rdma_cap_ib_cm(id->device, id->port_num)) {
957 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
958 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
960 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
963 if (qp_attr->qp_state == IB_QPS_RTR)
964 qp_attr->rq_psn = id_priv->seq_num;
965 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
966 if (!id_priv->cm_id.iw) {
967 qp_attr->qp_access_flags = 0;
968 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
970 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
977 EXPORT_SYMBOL(rdma_init_qp_attr);
979 static inline int cma_zero_addr(struct sockaddr *addr)
981 switch (addr->sa_family) {
983 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
985 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
987 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
993 static inline int cma_loopback_addr(struct sockaddr *addr)
995 switch (addr->sa_family) {
997 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
999 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
1001 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
1007 static inline int cma_any_addr(struct sockaddr *addr)
1009 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1012 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1014 if (src->sa_family != dst->sa_family)
1017 switch (src->sa_family) {
1019 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1020 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1022 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1023 &((struct sockaddr_in6 *) dst)->sin6_addr);
1025 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1026 &((struct sockaddr_ib *) dst)->sib_addr);
1030 static __be16 cma_port(struct sockaddr *addr)
1032 struct sockaddr_ib *sib;
1034 switch (addr->sa_family) {
1036 return ((struct sockaddr_in *) addr)->sin_port;
1038 return ((struct sockaddr_in6 *) addr)->sin6_port;
1040 sib = (struct sockaddr_ib *) addr;
1041 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1042 be64_to_cpu(sib->sib_sid_mask)));
1048 static inline int cma_any_port(struct sockaddr *addr)
1050 return !cma_port(addr);
1053 static void cma_save_ib_info(struct sockaddr *src_addr,
1054 struct sockaddr *dst_addr,
1055 struct rdma_cm_id *listen_id,
1056 struct ib_sa_path_rec *path)
1058 struct sockaddr_ib *listen_ib, *ib;
1060 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1062 ib = (struct sockaddr_ib *)src_addr;
1063 ib->sib_family = AF_IB;
1065 ib->sib_pkey = path->pkey;
1066 ib->sib_flowinfo = path->flow_label;
1067 memcpy(&ib->sib_addr, &path->sgid, 16);
1068 ib->sib_sid = path->service_id;
1069 ib->sib_scope_id = 0;
1071 ib->sib_pkey = listen_ib->sib_pkey;
1072 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1073 ib->sib_addr = listen_ib->sib_addr;
1074 ib->sib_sid = listen_ib->sib_sid;
1075 ib->sib_scope_id = listen_ib->sib_scope_id;
1077 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1080 ib = (struct sockaddr_ib *)dst_addr;
1081 ib->sib_family = AF_IB;
1083 ib->sib_pkey = path->pkey;
1084 ib->sib_flowinfo = path->flow_label;
1085 memcpy(&ib->sib_addr, &path->dgid, 16);
1090 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1091 struct sockaddr_in *dst_addr,
1092 struct cma_hdr *hdr,
1096 *src_addr = (struct sockaddr_in) {
1097 .sin_len = sizeof(struct sockaddr_in),
1098 .sin_family = AF_INET,
1099 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1100 .sin_port = local_port,
1105 *dst_addr = (struct sockaddr_in) {
1106 .sin_len = sizeof(struct sockaddr_in),
1107 .sin_family = AF_INET,
1108 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1109 .sin_port = hdr->port,
1114 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1115 struct sockaddr_in6 *dst_addr,
1116 struct cma_hdr *hdr,
1120 *src_addr = (struct sockaddr_in6) {
1121 .sin6_len = sizeof(struct sockaddr_in6),
1122 .sin6_family = AF_INET6,
1123 .sin6_addr = hdr->dst_addr.ip6,
1124 .sin6_port = local_port,
1129 *dst_addr = (struct sockaddr_in6) {
1130 .sin6_len = sizeof(struct sockaddr_in6),
1131 .sin6_family = AF_INET6,
1132 .sin6_addr = hdr->src_addr.ip6,
1133 .sin6_port = hdr->port,
1138 static u16 cma_port_from_service_id(__be64 service_id)
1140 return (u16)be64_to_cpu(service_id);
1143 static int cma_save_ip_info(struct sockaddr *src_addr,
1144 struct sockaddr *dst_addr,
1145 struct ib_cm_event *ib_event,
1148 struct cma_hdr *hdr;
1151 hdr = ib_event->private_data;
1152 if (hdr->cma_version != CMA_VERSION)
1155 port = htons(cma_port_from_service_id(service_id));
1157 switch (cma_get_ip_ver(hdr)) {
1159 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1160 (struct sockaddr_in *)dst_addr, hdr, port);
1163 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1164 (struct sockaddr_in6 *)dst_addr, hdr, port);
1167 return -EAFNOSUPPORT;
1173 static int cma_save_net_info(struct sockaddr *src_addr,
1174 struct sockaddr *dst_addr,
1175 struct rdma_cm_id *listen_id,
1176 struct ib_cm_event *ib_event,
1177 sa_family_t sa_family, __be64 service_id)
1179 if (sa_family == AF_IB) {
1180 if (ib_event->event == IB_CM_REQ_RECEIVED)
1181 cma_save_ib_info(src_addr, dst_addr, listen_id,
1182 ib_event->param.req_rcvd.primary_path);
1183 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1184 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1188 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1191 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1192 struct cma_req_info *req)
1194 const struct ib_cm_req_event_param *req_param =
1195 &ib_event->param.req_rcvd;
1196 const struct ib_cm_sidr_req_event_param *sidr_param =
1197 &ib_event->param.sidr_req_rcvd;
1199 switch (ib_event->event) {
1200 case IB_CM_REQ_RECEIVED:
1201 req->device = req_param->listen_id->device;
1202 req->port = req_param->port;
1203 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1204 sizeof(req->local_gid));
1205 req->has_gid = true;
1206 req->service_id = req_param->primary_path->service_id;
1207 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1208 if (req->pkey != req_param->bth_pkey)
1209 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1210 "RDMA CMA: in the future this may cause the request to be dropped\n",
1211 req_param->bth_pkey, req->pkey);
1213 case IB_CM_SIDR_REQ_RECEIVED:
1214 req->device = sidr_param->listen_id->device;
1215 req->port = sidr_param->port;
1216 req->has_gid = false;
1217 req->service_id = sidr_param->service_id;
1218 req->pkey = sidr_param->pkey;
1219 if (req->pkey != sidr_param->bth_pkey)
1220 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1221 "RDMA CMA: in the future this may cause the request to be dropped\n",
1222 sidr_param->bth_pkey, req->pkey);
1231 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1232 const struct sockaddr_in *dst_addr,
1233 const struct sockaddr_in *src_addr)
1236 struct sockaddr_in dst_tmp = *dst_addr;
1237 __be32 daddr = dst_addr->sin_addr.s_addr,
1238 saddr = src_addr->sin_addr.s_addr;
1239 struct net_device *src_dev;
1240 struct rtentry *rte;
1243 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1244 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1245 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1246 ipv4_is_loopback(saddr))
1249 src_dev = ip_dev_find(net_dev->if_vnet, saddr);
1250 if (src_dev != net_dev) {
1251 if (src_dev != NULL)
1258 * Make sure the socket address length field
1259 * is set, else rtalloc1() will fail.
1261 dst_tmp.sin_len = sizeof(dst_tmp);
1263 CURVNET_SET(net_dev->if_vnet);
1264 rte = rtalloc1((struct sockaddr *)&dst_tmp, 1, 0);
1267 ret = (rte->rt_ifp == net_dev);
1278 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1279 const struct sockaddr_in6 *dst_addr,
1280 const struct sockaddr_in6 *src_addr)
1283 struct sockaddr_in6 dst_tmp = *dst_addr;
1284 struct in6_addr in6_addr = src_addr->sin6_addr;
1285 struct net_device *src_dev;
1286 struct rtentry *rte;
1289 src_dev = ip6_dev_find(net_dev->if_vnet, in6_addr);
1290 if (src_dev != net_dev)
1294 * Make sure the socket address length field
1295 * is set, else rtalloc1() will fail.
1297 dst_tmp.sin6_len = sizeof(dst_tmp);
1299 CURVNET_SET(net_dev->if_vnet);
1300 rte = rtalloc1((struct sockaddr *)&dst_tmp, 1, 0);
1303 ret = (rte->rt_ifp == net_dev);
1314 static bool validate_net_dev(struct net_device *net_dev,
1315 const struct sockaddr *daddr,
1316 const struct sockaddr *saddr)
1318 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1319 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1320 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1321 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1323 switch (daddr->sa_family) {
1325 return saddr->sa_family == AF_INET &&
1326 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1329 return saddr->sa_family == AF_INET6 &&
1330 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1337 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1338 const struct cma_req_info *req)
1340 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1341 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1342 *src_addr = (struct sockaddr *)&src_addr_storage;
1343 struct net_device *net_dev;
1344 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1347 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1350 return ERR_PTR(err);
1352 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1355 return ERR_PTR(-ENODEV);
1357 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1359 return ERR_PTR(-EHOSTUNREACH);
1365 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1367 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1370 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1371 const struct cma_hdr *hdr)
1373 struct sockaddr *addr = cma_src_addr(id_priv);
1375 struct in6_addr ip6_addr;
1377 if (cma_any_addr(addr) && !id_priv->afonly)
1380 switch (addr->sa_family) {
1382 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1383 if (cma_get_ip_ver(hdr) != 4)
1385 if (!cma_any_addr(addr) &&
1386 hdr->dst_addr.ip4.addr != ip4_addr)
1390 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1391 if (cma_get_ip_ver(hdr) != 6)
1393 if (!cma_any_addr(addr) &&
1394 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1406 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1408 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1409 enum rdma_transport_type transport =
1410 rdma_node_get_transport(device->node_type);
1412 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1415 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1417 struct ib_device *device = id->device;
1418 const int port_num = id->port_num ?: rdma_start_port(device);
1420 return cma_protocol_roce_dev_port(device, port_num);
1423 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1424 const struct net_device *net_dev,
1427 const struct rdma_addr *addr = &id->route.addr;
1430 /* This request is an AF_IB request or a RoCE request */
1431 return (!id->port_num || id->port_num == port_num) &&
1432 (addr->src_addr.ss_family == AF_IB ||
1433 cma_protocol_roce_dev_port(id->device, port_num));
1435 return !addr->dev_addr.bound_dev_if ||
1436 (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1437 addr->dev_addr.bound_dev_if == net_dev->if_index);
1440 static struct rdma_id_private *cma_find_listener(
1441 const struct rdma_bind_list *bind_list,
1442 const struct ib_cm_id *cm_id,
1443 const struct ib_cm_event *ib_event,
1444 const struct cma_req_info *req,
1445 const struct net_device *net_dev)
1447 struct rdma_id_private *id_priv, *id_priv_dev;
1450 return ERR_PTR(-EINVAL);
1452 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1453 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1454 if (id_priv->id.device == cm_id->device &&
1455 cma_match_net_dev(&id_priv->id, net_dev, req->port))
1457 list_for_each_entry(id_priv_dev,
1458 &id_priv->listen_list,
1460 if (id_priv_dev->id.device == cm_id->device &&
1461 cma_match_net_dev(&id_priv_dev->id, net_dev, req->port))
1467 return ERR_PTR(-EINVAL);
1470 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1471 struct ib_cm_event *ib_event,
1472 struct net_device **net_dev)
1474 struct cma_req_info req;
1475 struct rdma_bind_list *bind_list;
1476 struct rdma_id_private *id_priv;
1479 err = cma_save_req_info(ib_event, &req);
1481 return ERR_PTR(err);
1483 *net_dev = cma_get_net_dev(ib_event, &req);
1484 if (IS_ERR(*net_dev)) {
1485 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1486 /* Assuming the protocol is AF_IB */
1488 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1489 /* TODO find the net dev matching the request parameters
1490 * through the RoCE GID table */
1493 return ERR_CAST(*net_dev);
1497 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1498 rdma_ps_from_service_id(req.service_id),
1499 cma_port_from_service_id(req.service_id));
1500 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1501 if (IS_ERR(id_priv) && *net_dev) {
1509 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1511 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1514 static void cma_cancel_route(struct rdma_id_private *id_priv)
1516 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1518 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1522 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1524 struct rdma_id_private *dev_id_priv;
1527 * Remove from listen_any_list to prevent added devices from spawning
1528 * additional listen requests.
1531 list_del(&id_priv->list);
1533 while (!list_empty(&id_priv->listen_list)) {
1534 dev_id_priv = list_entry(id_priv->listen_list.next,
1535 struct rdma_id_private, listen_list);
1536 /* sync with device removal to avoid duplicate destruction */
1537 list_del_init(&dev_id_priv->list);
1538 list_del(&dev_id_priv->listen_list);
1539 mutex_unlock(&lock);
1541 rdma_destroy_id(&dev_id_priv->id);
1544 mutex_unlock(&lock);
1547 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1548 enum rdma_cm_state state)
1551 case RDMA_CM_ADDR_QUERY:
1552 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1554 case RDMA_CM_ROUTE_QUERY:
1555 cma_cancel_route(id_priv);
1557 case RDMA_CM_LISTEN:
1558 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1559 cma_cancel_listens(id_priv);
1566 static void cma_release_port(struct rdma_id_private *id_priv)
1568 struct rdma_bind_list *bind_list = id_priv->bind_list;
1569 struct vnet *net = id_priv->id.route.addr.dev_addr.net;
1575 hlist_del(&id_priv->node);
1576 if (hlist_empty(&bind_list->owners)) {
1577 cma_ps_remove(net, bind_list->ps, bind_list->port);
1580 mutex_unlock(&lock);
1583 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1585 struct cma_multicast *mc;
1587 while (!list_empty(&id_priv->mc_list)) {
1588 mc = container_of(id_priv->mc_list.next,
1589 struct cma_multicast, list);
1590 list_del(&mc->list);
1591 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1592 id_priv->id.port_num)) {
1593 ib_sa_free_multicast(mc->multicast.ib);
1596 if (mc->igmp_joined) {
1597 struct rdma_dev_addr *dev_addr =
1598 &id_priv->id.route.addr.dev_addr;
1599 struct net_device *ndev = NULL;
1601 if (dev_addr->bound_dev_if)
1602 ndev = dev_get_by_index(dev_addr->net,
1603 dev_addr->bound_dev_if);
1608 kref_put(&mc->mcref, release_mc);
1613 void rdma_destroy_id(struct rdma_cm_id *id)
1615 struct rdma_id_private *id_priv;
1616 enum rdma_cm_state state;
1618 id_priv = container_of(id, struct rdma_id_private, id);
1619 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1620 cma_cancel_operation(id_priv, state);
1623 * Wait for any active callback to finish. New callbacks will find
1624 * the id_priv state set to destroying and abort.
1626 mutex_lock(&id_priv->handler_mutex);
1627 mutex_unlock(&id_priv->handler_mutex);
1629 if (id_priv->cma_dev) {
1630 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1631 if (id_priv->cm_id.ib)
1632 ib_destroy_cm_id(id_priv->cm_id.ib);
1633 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1634 if (id_priv->cm_id.iw)
1635 iw_destroy_cm_id(id_priv->cm_id.iw);
1637 cma_leave_mc_groups(id_priv);
1638 cma_release_dev(id_priv);
1641 cma_release_port(id_priv);
1642 cma_deref_id(id_priv);
1643 wait_for_completion(&id_priv->comp);
1645 if (id_priv->internal_id)
1646 cma_deref_id(id_priv->id.context);
1648 kfree(id_priv->id.route.path_rec);
1651 EXPORT_SYMBOL(rdma_destroy_id);
1653 static int cma_rep_recv(struct rdma_id_private *id_priv)
1657 ret = cma_modify_qp_rtr(id_priv, NULL);
1661 ret = cma_modify_qp_rts(id_priv, NULL);
1665 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1671 cma_modify_qp_err(id_priv);
1672 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1677 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1678 struct ib_cm_rep_event_param *rep_data,
1681 event->param.conn.private_data = private_data;
1682 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1683 event->param.conn.responder_resources = rep_data->responder_resources;
1684 event->param.conn.initiator_depth = rep_data->initiator_depth;
1685 event->param.conn.flow_control = rep_data->flow_control;
1686 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1687 event->param.conn.srq = rep_data->srq;
1688 event->param.conn.qp_num = rep_data->remote_qpn;
1691 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1693 struct rdma_id_private *id_priv = cm_id->context;
1694 struct rdma_cm_event event;
1697 mutex_lock(&id_priv->handler_mutex);
1698 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1699 id_priv->state != RDMA_CM_CONNECT) ||
1700 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1701 id_priv->state != RDMA_CM_DISCONNECT))
1704 memset(&event, 0, sizeof event);
1705 switch (ib_event->event) {
1706 case IB_CM_REQ_ERROR:
1707 case IB_CM_REP_ERROR:
1708 event.event = RDMA_CM_EVENT_UNREACHABLE;
1709 event.status = -ETIMEDOUT;
1711 case IB_CM_REP_RECEIVED:
1712 if (id_priv->id.qp) {
1713 event.status = cma_rep_recv(id_priv);
1714 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1715 RDMA_CM_EVENT_ESTABLISHED;
1717 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1719 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1720 ib_event->private_data);
1722 case IB_CM_RTU_RECEIVED:
1723 case IB_CM_USER_ESTABLISHED:
1724 event.event = RDMA_CM_EVENT_ESTABLISHED;
1726 case IB_CM_DREQ_ERROR:
1727 event.status = -ETIMEDOUT; /* fall through */
1728 case IB_CM_DREQ_RECEIVED:
1729 case IB_CM_DREP_RECEIVED:
1730 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1731 RDMA_CM_DISCONNECT))
1733 event.event = RDMA_CM_EVENT_DISCONNECTED;
1735 case IB_CM_TIMEWAIT_EXIT:
1736 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1738 case IB_CM_MRA_RECEIVED:
1741 case IB_CM_REJ_RECEIVED:
1742 cma_modify_qp_err(id_priv);
1743 event.status = ib_event->param.rej_rcvd.reason;
1744 event.event = RDMA_CM_EVENT_REJECTED;
1745 event.param.conn.private_data = ib_event->private_data;
1746 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1749 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1754 ret = id_priv->id.event_handler(&id_priv->id, &event);
1756 /* Destroy the CM ID by returning a non-zero value. */
1757 id_priv->cm_id.ib = NULL;
1758 cma_exch(id_priv, RDMA_CM_DESTROYING);
1759 mutex_unlock(&id_priv->handler_mutex);
1760 rdma_destroy_id(&id_priv->id);
1764 mutex_unlock(&id_priv->handler_mutex);
1768 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1769 struct ib_cm_event *ib_event,
1770 struct net_device *net_dev)
1772 struct rdma_id_private *id_priv;
1773 struct rdma_cm_id *id;
1774 struct rdma_route *rt;
1775 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1776 const __be64 service_id =
1777 ib_event->param.req_rcvd.primary_path->service_id;
1780 id = rdma_create_id(listen_id->route.addr.dev_addr.net,
1781 listen_id->event_handler, listen_id->context,
1782 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1786 id_priv = container_of(id, struct rdma_id_private, id);
1787 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1788 (struct sockaddr *)&id->route.addr.dst_addr,
1789 listen_id, ib_event, ss_family, service_id))
1793 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1794 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1799 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1800 if (rt->num_paths == 2)
1801 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1804 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1808 if (!cma_protocol_roce(listen_id) &&
1809 cma_any_addr(cma_src_addr(id_priv))) {
1810 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1811 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1812 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1813 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1814 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1819 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1821 id_priv->state = RDMA_CM_CONNECT;
1825 rdma_destroy_id(id);
1829 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1830 struct ib_cm_event *ib_event,
1831 struct net_device *net_dev)
1833 struct rdma_id_private *id_priv;
1834 struct rdma_cm_id *id;
1835 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1836 struct vnet *net = listen_id->route.addr.dev_addr.net;
1839 id = rdma_create_id(net, listen_id->event_handler, listen_id->context,
1840 listen_id->ps, IB_QPT_UD);
1844 id_priv = container_of(id, struct rdma_id_private, id);
1845 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1846 (struct sockaddr *)&id->route.addr.dst_addr,
1847 listen_id, ib_event, ss_family,
1848 ib_event->param.sidr_req_rcvd.service_id))
1852 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1856 if (!cma_any_addr(cma_src_addr(id_priv))) {
1857 ret = cma_translate_addr(cma_src_addr(id_priv),
1858 &id->route.addr.dev_addr);
1864 id_priv->state = RDMA_CM_CONNECT;
1867 rdma_destroy_id(id);
1871 static void cma_set_req_event_data(struct rdma_cm_event *event,
1872 struct ib_cm_req_event_param *req_data,
1873 void *private_data, int offset)
1875 event->param.conn.private_data = (char *)private_data + offset;
1876 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1877 event->param.conn.responder_resources = req_data->responder_resources;
1878 event->param.conn.initiator_depth = req_data->initiator_depth;
1879 event->param.conn.flow_control = req_data->flow_control;
1880 event->param.conn.retry_count = req_data->retry_count;
1881 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1882 event->param.conn.srq = req_data->srq;
1883 event->param.conn.qp_num = req_data->remote_qpn;
1886 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1888 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1889 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1890 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1891 (id->qp_type == IB_QPT_UD)) ||
1895 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1897 struct rdma_id_private *listen_id, *conn_id = NULL;
1898 struct rdma_cm_event event;
1899 struct net_device *net_dev;
1902 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1903 if (IS_ERR(listen_id))
1904 return PTR_ERR(listen_id);
1906 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1911 mutex_lock(&listen_id->handler_mutex);
1912 if (listen_id->state != RDMA_CM_LISTEN) {
1913 ret = -ECONNABORTED;
1917 memset(&event, 0, sizeof event);
1918 offset = cma_user_data_offset(listen_id);
1919 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1920 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1921 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1922 event.param.ud.private_data = (char *)ib_event->private_data + offset;
1923 event.param.ud.private_data_len =
1924 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1926 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1927 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1928 ib_event->private_data, offset);
1935 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1936 ret = cma_acquire_dev(conn_id, listen_id);
1940 conn_id->cm_id.ib = cm_id;
1941 cm_id->context = conn_id;
1942 cm_id->cm_handler = cma_ib_handler;
1945 * Protect against the user destroying conn_id from another thread
1946 * until we're done accessing it.
1948 atomic_inc(&conn_id->refcount);
1949 ret = conn_id->id.event_handler(&conn_id->id, &event);
1953 * Acquire mutex to prevent user executing rdma_destroy_id()
1954 * while we're accessing the cm_id.
1957 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1958 (conn_id->id.qp_type != IB_QPT_UD))
1959 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1960 mutex_unlock(&lock);
1961 mutex_unlock(&conn_id->handler_mutex);
1962 mutex_unlock(&listen_id->handler_mutex);
1963 cma_deref_id(conn_id);
1969 cma_deref_id(conn_id);
1970 /* Destroy the CM ID by returning a non-zero value. */
1971 conn_id->cm_id.ib = NULL;
1973 cma_exch(conn_id, RDMA_CM_DESTROYING);
1974 mutex_unlock(&conn_id->handler_mutex);
1976 mutex_unlock(&listen_id->handler_mutex);
1978 rdma_destroy_id(&conn_id->id);
1987 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1989 if (addr->sa_family == AF_IB)
1990 return ((struct sockaddr_ib *) addr)->sib_sid;
1992 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1994 EXPORT_SYMBOL(rdma_get_service_id);
1996 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1998 struct rdma_id_private *id_priv = iw_id->context;
1999 struct rdma_cm_event event;
2001 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2002 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2004 mutex_lock(&id_priv->handler_mutex);
2005 if (id_priv->state != RDMA_CM_CONNECT)
2008 memset(&event, 0, sizeof event);
2009 switch (iw_event->event) {
2010 case IW_CM_EVENT_CLOSE:
2011 event.event = RDMA_CM_EVENT_DISCONNECTED;
2013 case IW_CM_EVENT_CONNECT_REPLY:
2014 memcpy(cma_src_addr(id_priv), laddr,
2015 rdma_addr_size(laddr));
2016 memcpy(cma_dst_addr(id_priv), raddr,
2017 rdma_addr_size(raddr));
2018 switch (iw_event->status) {
2020 event.event = RDMA_CM_EVENT_ESTABLISHED;
2021 event.param.conn.initiator_depth = iw_event->ird;
2022 event.param.conn.responder_resources = iw_event->ord;
2026 event.event = RDMA_CM_EVENT_REJECTED;
2029 event.event = RDMA_CM_EVENT_UNREACHABLE;
2032 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2036 case IW_CM_EVENT_ESTABLISHED:
2037 event.event = RDMA_CM_EVENT_ESTABLISHED;
2038 event.param.conn.initiator_depth = iw_event->ird;
2039 event.param.conn.responder_resources = iw_event->ord;
2045 event.status = iw_event->status;
2046 event.param.conn.private_data = iw_event->private_data;
2047 event.param.conn.private_data_len = iw_event->private_data_len;
2048 ret = id_priv->id.event_handler(&id_priv->id, &event);
2050 /* Destroy the CM ID by returning a non-zero value. */
2051 id_priv->cm_id.iw = NULL;
2052 cma_exch(id_priv, RDMA_CM_DESTROYING);
2053 mutex_unlock(&id_priv->handler_mutex);
2054 rdma_destroy_id(&id_priv->id);
2059 mutex_unlock(&id_priv->handler_mutex);
2063 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2064 struct iw_cm_event *iw_event)
2066 struct rdma_cm_id *new_cm_id;
2067 struct rdma_id_private *listen_id, *conn_id;
2068 struct rdma_cm_event event;
2069 int ret = -ECONNABORTED;
2070 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2071 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2073 listen_id = cm_id->context;
2075 mutex_lock(&listen_id->handler_mutex);
2076 if (listen_id->state != RDMA_CM_LISTEN)
2079 /* Create a new RDMA id for the new IW CM ID */
2080 new_cm_id = rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2081 listen_id->id.event_handler,
2082 listen_id->id.context,
2083 RDMA_PS_TCP, IB_QPT_RC);
2084 if (IS_ERR(new_cm_id)) {
2088 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2089 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2090 conn_id->state = RDMA_CM_CONNECT;
2092 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
2094 mutex_unlock(&conn_id->handler_mutex);
2095 rdma_destroy_id(new_cm_id);
2099 ret = cma_acquire_dev(conn_id, listen_id);
2101 mutex_unlock(&conn_id->handler_mutex);
2102 rdma_destroy_id(new_cm_id);
2106 conn_id->cm_id.iw = cm_id;
2107 cm_id->context = conn_id;
2108 cm_id->cm_handler = cma_iw_handler;
2110 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2111 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2113 memset(&event, 0, sizeof event);
2114 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2115 event.param.conn.private_data = iw_event->private_data;
2116 event.param.conn.private_data_len = iw_event->private_data_len;
2117 event.param.conn.initiator_depth = iw_event->ird;
2118 event.param.conn.responder_resources = iw_event->ord;
2121 * Protect against the user destroying conn_id from another thread
2122 * until we're done accessing it.
2124 atomic_inc(&conn_id->refcount);
2125 ret = conn_id->id.event_handler(&conn_id->id, &event);
2127 /* User wants to destroy the CM ID */
2128 conn_id->cm_id.iw = NULL;
2129 cma_exch(conn_id, RDMA_CM_DESTROYING);
2130 mutex_unlock(&conn_id->handler_mutex);
2131 cma_deref_id(conn_id);
2132 rdma_destroy_id(&conn_id->id);
2136 mutex_unlock(&conn_id->handler_mutex);
2137 cma_deref_id(conn_id);
2140 mutex_unlock(&listen_id->handler_mutex);
2144 static int cma_ib_listen(struct rdma_id_private *id_priv)
2146 struct sockaddr *addr;
2147 struct ib_cm_id *id;
2150 addr = cma_src_addr(id_priv);
2151 svc_id = rdma_get_service_id(&id_priv->id, addr);
2152 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
2155 id_priv->cm_id.ib = id;
2160 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2163 struct iw_cm_id *id;
2165 id = iw_create_cm_id(id_priv->id.device,
2166 iw_conn_req_handler,
2171 id->tos = id_priv->tos;
2172 id_priv->cm_id.iw = id;
2174 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2175 rdma_addr_size(cma_src_addr(id_priv)));
2177 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2180 iw_destroy_cm_id(id_priv->cm_id.iw);
2181 id_priv->cm_id.iw = NULL;
2187 static int cma_listen_handler(struct rdma_cm_id *id,
2188 struct rdma_cm_event *event)
2190 struct rdma_id_private *id_priv = id->context;
2192 id->context = id_priv->id.context;
2193 id->event_handler = id_priv->id.event_handler;
2194 return id_priv->id.event_handler(id, event);
2197 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2198 struct cma_device *cma_dev)
2200 struct rdma_id_private *dev_id_priv;
2201 struct rdma_cm_id *id;
2202 struct vnet *net = id_priv->id.route.addr.dev_addr.net;
2205 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2208 id = rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2209 id_priv->id.qp_type);
2213 dev_id_priv = container_of(id, struct rdma_id_private, id);
2215 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2216 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2217 rdma_addr_size(cma_src_addr(id_priv)));
2219 _cma_attach_to_dev(dev_id_priv, cma_dev);
2220 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2221 atomic_inc(&id_priv->refcount);
2222 dev_id_priv->internal_id = 1;
2223 dev_id_priv->afonly = id_priv->afonly;
2225 ret = rdma_listen(id, id_priv->backlog);
2227 pr_warn("RDMA CMA: cma_listen_on_dev, error %d, listening on device %s\n",
2228 ret, cma_dev->device->name);
2231 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2233 struct cma_device *cma_dev;
2236 list_add_tail(&id_priv->list, &listen_any_list);
2237 list_for_each_entry(cma_dev, &dev_list, list)
2238 cma_listen_on_dev(id_priv, cma_dev);
2239 mutex_unlock(&lock);
2242 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2244 struct rdma_id_private *id_priv;
2246 id_priv = container_of(id, struct rdma_id_private, id);
2247 id_priv->tos = (u8) tos;
2249 EXPORT_SYMBOL(rdma_set_service_type);
2251 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2254 struct cma_work *work = context;
2255 struct rdma_route *route;
2257 route = &work->id->id.route;
2260 route->num_paths = 1;
2261 *route->path_rec = *path_rec;
2263 work->old_state = RDMA_CM_ROUTE_QUERY;
2264 work->new_state = RDMA_CM_ADDR_RESOLVED;
2265 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2266 work->event.status = status;
2269 queue_work(cma_wq, &work->work);
2272 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2273 struct cma_work *work)
2275 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2276 struct ib_sa_path_rec path_rec;
2277 ib_sa_comp_mask comp_mask;
2278 struct sockaddr_in6 *sin6;
2279 struct sockaddr_ib *sib;
2281 memset(&path_rec, 0, sizeof path_rec);
2282 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2283 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2284 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2285 path_rec.numb_path = 1;
2286 path_rec.reversible = 1;
2287 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2289 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2290 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2291 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2293 switch (cma_family(id_priv)) {
2295 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2296 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2299 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2300 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2301 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2304 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2305 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2306 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2310 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2311 id_priv->id.port_num, &path_rec,
2312 comp_mask, timeout_ms,
2313 GFP_KERNEL, cma_query_handler,
2314 work, &id_priv->query);
2316 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2319 static void cma_work_handler(struct work_struct *_work)
2321 struct cma_work *work = container_of(_work, struct cma_work, work);
2322 struct rdma_id_private *id_priv = work->id;
2325 mutex_lock(&id_priv->handler_mutex);
2326 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2329 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2330 cma_exch(id_priv, RDMA_CM_DESTROYING);
2334 mutex_unlock(&id_priv->handler_mutex);
2335 cma_deref_id(id_priv);
2337 rdma_destroy_id(&id_priv->id);
2341 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2343 struct rdma_route *route = &id_priv->id.route;
2344 struct cma_work *work;
2347 work = kzalloc(sizeof *work, GFP_KERNEL);
2352 INIT_WORK(&work->work, cma_work_handler);
2353 work->old_state = RDMA_CM_ROUTE_QUERY;
2354 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2355 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2357 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2358 if (!route->path_rec) {
2363 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2369 kfree(route->path_rec);
2370 route->path_rec = NULL;
2376 int rdma_set_ib_paths(struct rdma_cm_id *id,
2377 struct ib_sa_path_rec *path_rec, int num_paths)
2379 struct rdma_id_private *id_priv;
2382 id_priv = container_of(id, struct rdma_id_private, id);
2383 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2384 RDMA_CM_ROUTE_RESOLVED))
2387 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2389 if (!id->route.path_rec) {
2394 id->route.num_paths = num_paths;
2397 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2400 EXPORT_SYMBOL(rdma_set_ib_paths);
2402 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2404 struct cma_work *work;
2406 work = kzalloc(sizeof *work, GFP_KERNEL);
2411 INIT_WORK(&work->work, cma_work_handler);
2412 work->old_state = RDMA_CM_ROUTE_QUERY;
2413 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2414 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2415 queue_work(cma_wq, &work->work);
2419 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2421 /* TODO: Implement this function */
2425 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2426 unsigned long supported_gids,
2427 enum ib_gid_type default_gid)
2429 if ((network_type == RDMA_NETWORK_IPV4 ||
2430 network_type == RDMA_NETWORK_IPV6) &&
2431 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2432 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2437 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2439 struct rdma_route *route = &id_priv->id.route;
2440 struct rdma_addr *addr = &route->addr;
2441 struct cma_work *work;
2443 struct net_device *ndev = NULL;
2446 work = kzalloc(sizeof *work, GFP_KERNEL);
2451 INIT_WORK(&work->work, cma_work_handler);
2453 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2454 if (!route->path_rec) {
2459 route->num_paths = 1;
2461 if (addr->dev_addr.bound_dev_if) {
2462 unsigned long supported_gids;
2464 ndev = dev_get_by_index(addr->dev_addr.net,
2465 addr->dev_addr.bound_dev_if);
2471 if (ndev->if_flags & IFF_LOOPBACK) {
2473 if (!id_priv->id.device->get_netdev) {
2478 ndev = id_priv->id.device->get_netdev(id_priv->id.device,
2479 id_priv->id.port_num);
2486 route->path_rec->net = ndev->if_vnet;
2487 route->path_rec->ifindex = ndev->if_index;
2488 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2489 id_priv->id.port_num);
2490 route->path_rec->gid_type =
2491 cma_route_gid_type(addr->dev_addr.network,
2500 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
2502 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2503 &route->path_rec->sgid);
2504 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2505 &route->path_rec->dgid);
2507 /* Use the hint from IP Stack to select GID Type */
2508 if (route->path_rec->gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2509 route->path_rec->gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2510 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2511 /* TODO: get the hoplimit from the inet/inet6 device */
2512 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2514 route->path_rec->hop_limit = 1;
2515 route->path_rec->reversible = 1;
2516 route->path_rec->pkey = cpu_to_be16(0xffff);
2517 route->path_rec->mtu_selector = IB_SA_EQ;
2518 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
2519 route->path_rec->mtu = iboe_get_mtu(ndev->if_mtu);
2520 route->path_rec->rate_selector = IB_SA_EQ;
2521 route->path_rec->rate = iboe_get_rate(ndev);
2523 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2524 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2525 if (!route->path_rec->mtu) {
2530 work->old_state = RDMA_CM_ROUTE_QUERY;
2531 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2532 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2533 work->event.status = 0;
2535 queue_work(cma_wq, &work->work);
2540 kfree(route->path_rec);
2541 route->path_rec = NULL;
2547 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2549 struct rdma_id_private *id_priv;
2552 id_priv = container_of(id, struct rdma_id_private, id);
2553 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2556 atomic_inc(&id_priv->refcount);
2557 if (rdma_cap_ib_sa(id->device, id->port_num))
2558 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2559 else if (rdma_protocol_roce(id->device, id->port_num))
2560 ret = cma_resolve_iboe_route(id_priv);
2561 else if (rdma_protocol_iwarp(id->device, id->port_num))
2562 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2571 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2572 cma_deref_id(id_priv);
2575 EXPORT_SYMBOL(rdma_resolve_route);
2577 static void cma_set_loopback(struct sockaddr *addr)
2579 switch (addr->sa_family) {
2581 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2584 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2588 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2594 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2596 struct cma_device *cma_dev, *cur_dev;
2597 struct ib_port_attr port_attr;
2605 list_for_each_entry(cur_dev, &dev_list, list) {
2606 if (cma_family(id_priv) == AF_IB &&
2607 !rdma_cap_ib_cm(cur_dev->device, 1))
2613 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2614 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2615 port_attr.state == IB_PORT_ACTIVE) {
2630 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid, NULL);
2634 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2638 id_priv->id.route.addr.dev_addr.dev_type =
2639 (rdma_protocol_ib(cma_dev->device, p)) ?
2640 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2642 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2643 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2644 id_priv->id.port_num = p;
2645 cma_attach_to_dev(id_priv, cma_dev);
2646 cma_set_loopback(cma_src_addr(id_priv));
2648 mutex_unlock(&lock);
2652 static void addr_handler(int status, struct sockaddr *src_addr,
2653 struct rdma_dev_addr *dev_addr, void *context)
2655 struct rdma_id_private *id_priv = context;
2656 struct rdma_cm_event event;
2658 memset(&event, 0, sizeof event);
2659 mutex_lock(&id_priv->handler_mutex);
2660 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2661 RDMA_CM_ADDR_RESOLVED))
2664 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2665 if (!status && !id_priv->cma_dev)
2666 status = cma_acquire_dev(id_priv, NULL);
2669 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2670 RDMA_CM_ADDR_BOUND))
2672 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2673 event.status = status;
2675 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2677 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2678 cma_exch(id_priv, RDMA_CM_DESTROYING);
2679 mutex_unlock(&id_priv->handler_mutex);
2680 cma_deref_id(id_priv);
2681 rdma_destroy_id(&id_priv->id);
2685 mutex_unlock(&id_priv->handler_mutex);
2686 cma_deref_id(id_priv);
2689 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2691 struct cma_work *work;
2695 work = kzalloc(sizeof *work, GFP_KERNEL);
2699 if (!id_priv->cma_dev) {
2700 ret = cma_bind_loopback(id_priv);
2705 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2706 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2709 INIT_WORK(&work->work, cma_work_handler);
2710 work->old_state = RDMA_CM_ADDR_QUERY;
2711 work->new_state = RDMA_CM_ADDR_RESOLVED;
2712 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2713 queue_work(cma_wq, &work->work);
2720 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2722 struct cma_work *work;
2725 work = kzalloc(sizeof *work, GFP_KERNEL);
2729 if (!id_priv->cma_dev) {
2730 ret = cma_resolve_ib_dev(id_priv);
2735 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2736 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2739 INIT_WORK(&work->work, cma_work_handler);
2740 work->old_state = RDMA_CM_ADDR_QUERY;
2741 work->new_state = RDMA_CM_ADDR_RESOLVED;
2742 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2743 queue_work(cma_wq, &work->work);
2750 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2751 struct sockaddr *dst_addr)
2753 if (!src_addr || !src_addr->sa_family) {
2754 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2755 src_addr->sa_family = dst_addr->sa_family;
2756 if (dst_addr->sa_family == AF_INET6) {
2757 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2758 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2759 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2760 if (IN6_IS_SCOPE_LINKLOCAL(&dst_addr6->sin6_addr))
2761 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2762 } else if (dst_addr->sa_family == AF_IB) {
2763 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2764 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2767 return rdma_bind_addr(id, src_addr);
2770 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2771 struct sockaddr *dst_addr, int timeout_ms)
2773 struct rdma_id_private *id_priv;
2776 id_priv = container_of(id, struct rdma_id_private, id);
2777 if (id_priv->state == RDMA_CM_IDLE) {
2778 ret = cma_bind_addr(id, src_addr, dst_addr);
2783 if (cma_family(id_priv) != dst_addr->sa_family)
2786 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2789 atomic_inc(&id_priv->refcount);
2790 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2791 if (cma_any_addr(dst_addr)) {
2792 ret = cma_resolve_loopback(id_priv);
2794 if (dst_addr->sa_family == AF_IB) {
2795 ret = cma_resolve_ib_addr(id_priv);
2797 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2798 dst_addr, &id->route.addr.dev_addr,
2799 timeout_ms, addr_handler, id_priv);
2807 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2808 cma_deref_id(id_priv);
2811 EXPORT_SYMBOL(rdma_resolve_addr);
2813 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2815 struct rdma_id_private *id_priv;
2816 unsigned long flags;
2819 id_priv = container_of(id, struct rdma_id_private, id);
2820 spin_lock_irqsave(&id_priv->lock, flags);
2821 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2822 id_priv->reuseaddr = reuse;
2827 spin_unlock_irqrestore(&id_priv->lock, flags);
2830 EXPORT_SYMBOL(rdma_set_reuseaddr);
2832 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2834 struct rdma_id_private *id_priv;
2835 unsigned long flags;
2838 id_priv = container_of(id, struct rdma_id_private, id);
2839 spin_lock_irqsave(&id_priv->lock, flags);
2840 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2841 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2842 id_priv->afonly = afonly;
2847 spin_unlock_irqrestore(&id_priv->lock, flags);
2850 EXPORT_SYMBOL(rdma_set_afonly);
2852 static void cma_bind_port(struct rdma_bind_list *bind_list,
2853 struct rdma_id_private *id_priv)
2855 struct sockaddr *addr;
2856 struct sockaddr_ib *sib;
2860 addr = cma_src_addr(id_priv);
2861 port = htons(bind_list->port);
2863 switch (addr->sa_family) {
2865 ((struct sockaddr_in *) addr)->sin_port = port;
2868 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2871 sib = (struct sockaddr_ib *) addr;
2872 sid = be64_to_cpu(sib->sib_sid);
2873 mask = be64_to_cpu(sib->sib_sid_mask);
2874 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2875 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2878 id_priv->bind_list = bind_list;
2879 hlist_add_head(&id_priv->node, &bind_list->owners);
2882 static int cma_alloc_port(enum rdma_port_space ps,
2883 struct rdma_id_private *id_priv, unsigned short snum)
2885 struct rdma_bind_list *bind_list;
2888 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2892 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
2898 bind_list->port = (unsigned short)ret;
2899 cma_bind_port(bind_list, id_priv);
2903 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2906 static int cma_alloc_any_port(enum rdma_port_space ps,
2907 struct rdma_id_private *id_priv)
2909 static unsigned int last_used_port;
2910 int low, high, remaining;
2912 struct vnet *net = id_priv->id.route.addr.dev_addr.net;
2915 inet_get_local_port_range(net, &low, &high);
2916 remaining = (high - low) + 1;
2917 get_random_bytes(&rand, sizeof(rand));
2918 rover = rand % remaining + low;
2920 if (last_used_port != rover &&
2921 !cma_ps_find(net, ps, (unsigned short)rover)) {
2922 int ret = cma_alloc_port(ps, id_priv, rover);
2924 * Remember previously used port number in order to avoid
2925 * re-using same port immediately after it is closed.
2928 last_used_port = rover;
2929 if (ret != -EADDRNOTAVAIL)
2934 if ((rover < low) || (rover > high))
2938 return -EADDRNOTAVAIL;
2942 * Check that the requested port is available. This is called when trying to
2943 * bind to a specific port, or when trying to listen on a bound port. In
2944 * the latter case, the provided id_priv may already be on the bind_list, but
2945 * we still need to check that it's okay to start listening.
2947 static int cma_check_port(struct rdma_bind_list *bind_list,
2948 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2950 struct rdma_id_private *cur_id;
2951 struct sockaddr *addr, *cur_addr;
2953 addr = cma_src_addr(id_priv);
2954 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2955 if (id_priv == cur_id)
2958 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2962 cur_addr = cma_src_addr(cur_id);
2963 if (id_priv->afonly && cur_id->afonly &&
2964 (addr->sa_family != cur_addr->sa_family))
2967 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2968 return -EADDRNOTAVAIL;
2970 if (!cma_addr_cmp(addr, cur_addr))
2976 static int cma_use_port(enum rdma_port_space ps,
2977 struct rdma_id_private *id_priv)
2979 struct rdma_bind_list *bind_list;
2980 unsigned short snum;
2983 snum = ntohs(cma_port(cma_src_addr(id_priv)));
2984 if (snum < IPPORT_RESERVED &&
2985 priv_check(curthread, PRIV_NETINET_BINDANY) != 0)
2988 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
2990 ret = cma_alloc_port(ps, id_priv, snum);
2992 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2994 cma_bind_port(bind_list, id_priv);
2999 static int cma_bind_listen(struct rdma_id_private *id_priv)
3001 struct rdma_bind_list *bind_list = id_priv->bind_list;
3005 if (bind_list->owners.first->next)
3006 ret = cma_check_port(bind_list, id_priv, 0);
3007 mutex_unlock(&lock);
3011 static enum rdma_port_space cma_select_inet_ps(
3012 struct rdma_id_private *id_priv)
3014 switch (id_priv->id.ps) {
3019 return id_priv->id.ps;
3026 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
3028 enum rdma_port_space ps = 0;
3029 struct sockaddr_ib *sib;
3030 u64 sid_ps, mask, sid;
3032 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3033 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3034 sid = be64_to_cpu(sib->sib_sid) & mask;
3036 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3037 sid_ps = RDMA_IB_IP_PS_IB;
3039 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3040 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3041 sid_ps = RDMA_IB_IP_PS_TCP;
3043 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3044 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3045 sid_ps = RDMA_IB_IP_PS_UDP;
3050 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3051 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3052 be64_to_cpu(sib->sib_sid_mask));
3057 static int cma_get_port(struct rdma_id_private *id_priv)
3059 enum rdma_port_space ps;
3062 if (cma_family(id_priv) != AF_IB)
3063 ps = cma_select_inet_ps(id_priv);
3065 ps = cma_select_ib_ps(id_priv);
3067 return -EPROTONOSUPPORT;
3070 if (cma_any_port(cma_src_addr(id_priv)))
3071 ret = cma_alloc_any_port(ps, id_priv);
3073 ret = cma_use_port(ps, id_priv);
3074 mutex_unlock(&lock);
3079 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3080 struct sockaddr *addr)
3083 struct sockaddr_in6 sin6;
3085 if (addr->sa_family != AF_INET6)
3088 sin6 = *(struct sockaddr_in6 *)addr;
3090 if (!(IN6_IS_SCOPE_LINKLOCAL(&sin6.sin6_addr)))
3093 if (sa6_recoverscope(&sin6) || sin6.sin6_scope_id == 0)
3096 dev_addr->bound_dev_if = sin6.sin6_scope_id;
3101 int rdma_listen(struct rdma_cm_id *id, int backlog)
3103 struct rdma_id_private *id_priv;
3106 id_priv = container_of(id, struct rdma_id_private, id);
3107 if (id_priv->state == RDMA_CM_IDLE) {
3108 id->route.addr.src_addr.ss_family = AF_INET;
3109 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3114 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3117 if (id_priv->reuseaddr) {
3118 ret = cma_bind_listen(id_priv);
3123 id_priv->backlog = backlog;
3125 if (rdma_cap_ib_cm(id->device, 1)) {
3126 ret = cma_ib_listen(id_priv);
3129 } else if (rdma_cap_iw_cm(id->device, 1)) {
3130 ret = cma_iw_listen(id_priv, backlog);
3138 cma_listen_on_all(id_priv);
3142 id_priv->backlog = 0;
3143 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3146 EXPORT_SYMBOL(rdma_listen);
3148 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3150 struct rdma_id_private *id_priv;
3153 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3154 addr->sa_family != AF_IB)
3155 return -EAFNOSUPPORT;
3157 id_priv = container_of(id, struct rdma_id_private, id);
3158 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3161 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3165 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3166 if (!cma_any_addr(addr)) {
3167 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3171 ret = cma_acquire_dev(id_priv, NULL);
3176 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3177 if (addr->sa_family == AF_INET)
3178 id_priv->afonly = 1;
3180 else if (addr->sa_family == AF_INET6) {
3181 CURVNET_SET_QUIET(id_priv->id.route.addr.dev_addr.net);
3182 id_priv->afonly = V_ip6_v6only;
3187 ret = cma_get_port(id_priv);
3193 if (id_priv->cma_dev)
3194 cma_release_dev(id_priv);
3196 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3199 EXPORT_SYMBOL(rdma_bind_addr);
3201 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3203 struct cma_hdr *cma_hdr;
3206 cma_hdr->cma_version = CMA_VERSION;
3207 if (cma_family(id_priv) == AF_INET) {
3208 struct sockaddr_in *src4, *dst4;
3210 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3211 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3213 cma_set_ip_ver(cma_hdr, 4);
3214 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3215 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3216 cma_hdr->port = src4->sin_port;
3217 } else if (cma_family(id_priv) == AF_INET6) {
3218 struct sockaddr_in6 *src6, *dst6;
3220 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3221 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3223 cma_set_ip_ver(cma_hdr, 6);
3224 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3225 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3226 cma_hdr->port = src6->sin6_port;
3231 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3232 struct ib_cm_event *ib_event)
3234 struct rdma_id_private *id_priv = cm_id->context;
3235 struct rdma_cm_event event;
3236 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3239 mutex_lock(&id_priv->handler_mutex);
3240 if (id_priv->state != RDMA_CM_CONNECT)
3243 memset(&event, 0, sizeof event);
3244 switch (ib_event->event) {
3245 case IB_CM_SIDR_REQ_ERROR:
3246 event.event = RDMA_CM_EVENT_UNREACHABLE;
3247 event.status = -ETIMEDOUT;
3249 case IB_CM_SIDR_REP_RECEIVED:
3250 event.param.ud.private_data = ib_event->private_data;
3251 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3252 if (rep->status != IB_SIDR_SUCCESS) {
3253 event.event = RDMA_CM_EVENT_UNREACHABLE;
3254 event.status = ib_event->param.sidr_rep_rcvd.status;
3257 ret = cma_set_qkey(id_priv, rep->qkey);
3259 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3263 ret = ib_init_ah_from_path(id_priv->id.device,
3264 id_priv->id.port_num,
3265 id_priv->id.route.path_rec,
3266 &event.param.ud.ah_attr);
3268 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3272 event.param.ud.qp_num = rep->qpn;
3273 event.param.ud.qkey = rep->qkey;
3274 event.event = RDMA_CM_EVENT_ESTABLISHED;
3278 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3283 ret = id_priv->id.event_handler(&id_priv->id, &event);
3285 /* Destroy the CM ID by returning a non-zero value. */
3286 id_priv->cm_id.ib = NULL;
3287 cma_exch(id_priv, RDMA_CM_DESTROYING);
3288 mutex_unlock(&id_priv->handler_mutex);
3289 rdma_destroy_id(&id_priv->id);
3293 mutex_unlock(&id_priv->handler_mutex);
3297 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3298 struct rdma_conn_param *conn_param)
3300 struct ib_cm_sidr_req_param req;
3301 struct ib_cm_id *id;
3305 memset(&req, 0, sizeof req);
3306 offset = cma_user_data_offset(id_priv);
3307 req.private_data_len = offset + conn_param->private_data_len;
3308 if (req.private_data_len < conn_param->private_data_len)
3311 if (req.private_data_len) {
3312 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3316 private_data = NULL;
3319 if (conn_param->private_data && conn_param->private_data_len)
3320 memcpy((char *)private_data + offset, conn_param->private_data,
3321 conn_param->private_data_len);
3324 ret = cma_format_hdr(private_data, id_priv);
3327 req.private_data = private_data;
3330 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3336 id_priv->cm_id.ib = id;
3338 req.path = id_priv->id.route.path_rec;
3339 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3340 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3341 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3343 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3345 ib_destroy_cm_id(id_priv->cm_id.ib);
3346 id_priv->cm_id.ib = NULL;
3349 kfree(private_data);
3353 static int cma_connect_ib(struct rdma_id_private *id_priv,
3354 struct rdma_conn_param *conn_param)
3356 struct ib_cm_req_param req;
3357 struct rdma_route *route;
3359 struct ib_cm_id *id;
3362 memset(&req, 0, sizeof req);
3363 offset = cma_user_data_offset(id_priv);
3364 req.private_data_len = offset + conn_param->private_data_len;
3365 if (req.private_data_len < conn_param->private_data_len)
3368 if (req.private_data_len) {
3369 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3373 private_data = NULL;
3376 if (conn_param->private_data && conn_param->private_data_len)
3377 memcpy((char *)private_data + offset, conn_param->private_data,
3378 conn_param->private_data_len);
3380 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3385 id_priv->cm_id.ib = id;
3387 route = &id_priv->id.route;
3389 ret = cma_format_hdr(private_data, id_priv);
3392 req.private_data = private_data;
3395 req.primary_path = &route->path_rec[0];
3396 if (route->num_paths == 2)
3397 req.alternate_path = &route->path_rec[1];
3399 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3400 req.qp_num = id_priv->qp_num;
3401 req.qp_type = id_priv->id.qp_type;
3402 req.starting_psn = id_priv->seq_num;
3403 req.responder_resources = conn_param->responder_resources;
3404 req.initiator_depth = conn_param->initiator_depth;
3405 req.flow_control = conn_param->flow_control;
3406 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3407 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3408 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3409 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3410 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3411 req.srq = id_priv->srq ? 1 : 0;
3413 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3415 if (ret && !IS_ERR(id)) {
3416 ib_destroy_cm_id(id);
3417 id_priv->cm_id.ib = NULL;
3420 kfree(private_data);
3424 static int cma_connect_iw(struct rdma_id_private *id_priv,
3425 struct rdma_conn_param *conn_param)
3427 struct iw_cm_id *cm_id;
3429 struct iw_cm_conn_param iw_param;
3431 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3433 return PTR_ERR(cm_id);
3435 cm_id->tos = id_priv->tos;
3436 id_priv->cm_id.iw = cm_id;
3438 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3439 rdma_addr_size(cma_src_addr(id_priv)));
3440 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3441 rdma_addr_size(cma_dst_addr(id_priv)));
3443 ret = cma_modify_qp_rtr(id_priv, conn_param);
3448 iw_param.ord = conn_param->initiator_depth;
3449 iw_param.ird = conn_param->responder_resources;
3450 iw_param.private_data = conn_param->private_data;
3451 iw_param.private_data_len = conn_param->private_data_len;
3452 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3454 memset(&iw_param, 0, sizeof iw_param);
3455 iw_param.qpn = id_priv->qp_num;
3457 ret = iw_cm_connect(cm_id, &iw_param);
3460 iw_destroy_cm_id(cm_id);
3461 id_priv->cm_id.iw = NULL;
3466 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3468 struct rdma_id_private *id_priv;
3471 id_priv = container_of(id, struct rdma_id_private, id);
3472 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3476 id_priv->qp_num = conn_param->qp_num;
3477 id_priv->srq = conn_param->srq;
3480 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3481 if (id->qp_type == IB_QPT_UD)
3482 ret = cma_resolve_ib_udp(id_priv, conn_param);
3484 ret = cma_connect_ib(id_priv, conn_param);
3485 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3486 ret = cma_connect_iw(id_priv, conn_param);
3494 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3497 EXPORT_SYMBOL(rdma_connect);
3499 static int cma_accept_ib(struct rdma_id_private *id_priv,
3500 struct rdma_conn_param *conn_param)
3502 struct ib_cm_rep_param rep;
3505 ret = cma_modify_qp_rtr(id_priv, conn_param);
3509 ret = cma_modify_qp_rts(id_priv, conn_param);
3513 memset(&rep, 0, sizeof rep);
3514 rep.qp_num = id_priv->qp_num;
3515 rep.starting_psn = id_priv->seq_num;
3516 rep.private_data = conn_param->private_data;
3517 rep.private_data_len = conn_param->private_data_len;
3518 rep.responder_resources = conn_param->responder_resources;
3519 rep.initiator_depth = conn_param->initiator_depth;
3520 rep.failover_accepted = 0;
3521 rep.flow_control = conn_param->flow_control;
3522 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3523 rep.srq = id_priv->srq ? 1 : 0;
3525 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3530 static int cma_accept_iw(struct rdma_id_private *id_priv,
3531 struct rdma_conn_param *conn_param)
3533 struct iw_cm_conn_param iw_param;
3536 ret = cma_modify_qp_rtr(id_priv, conn_param);
3540 iw_param.ord = conn_param->initiator_depth;
3541 iw_param.ird = conn_param->responder_resources;
3542 iw_param.private_data = conn_param->private_data;
3543 iw_param.private_data_len = conn_param->private_data_len;
3544 if (id_priv->id.qp) {
3545 iw_param.qpn = id_priv->qp_num;
3547 iw_param.qpn = conn_param->qp_num;
3549 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3552 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3553 enum ib_cm_sidr_status status, u32 qkey,
3554 const void *private_data, int private_data_len)
3556 struct ib_cm_sidr_rep_param rep;
3559 memset(&rep, 0, sizeof rep);
3560 rep.status = status;
3561 if (status == IB_SIDR_SUCCESS) {
3562 ret = cma_set_qkey(id_priv, qkey);
3565 rep.qp_num = id_priv->qp_num;
3566 rep.qkey = id_priv->qkey;
3568 rep.private_data = private_data;
3569 rep.private_data_len = private_data_len;
3571 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3574 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3576 struct rdma_id_private *id_priv;
3579 id_priv = container_of(id, struct rdma_id_private, id);
3581 id_priv->owner = task_pid_nr(current);
3583 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3586 if (!id->qp && conn_param) {
3587 id_priv->qp_num = conn_param->qp_num;
3588 id_priv->srq = conn_param->srq;
3591 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3592 if (id->qp_type == IB_QPT_UD) {
3594 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3596 conn_param->private_data,
3597 conn_param->private_data_len);
3599 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3603 ret = cma_accept_ib(id_priv, conn_param);
3605 ret = cma_rep_recv(id_priv);
3607 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3608 ret = cma_accept_iw(id_priv, conn_param);
3617 cma_modify_qp_err(id_priv);
3618 rdma_reject(id, NULL, 0);
3621 EXPORT_SYMBOL(rdma_accept);
3623 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3625 struct rdma_id_private *id_priv;
3628 id_priv = container_of(id, struct rdma_id_private, id);
3629 if (!id_priv->cm_id.ib)
3632 switch (id->device->node_type) {
3633 case RDMA_NODE_IB_CA:
3634 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3642 EXPORT_SYMBOL(rdma_notify);
3644 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3645 u8 private_data_len)
3647 struct rdma_id_private *id_priv;
3650 id_priv = container_of(id, struct rdma_id_private, id);
3651 if (!id_priv->cm_id.ib)
3654 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3655 if (id->qp_type == IB_QPT_UD)
3656 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3657 private_data, private_data_len);
3659 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3660 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3661 0, private_data, private_data_len);
3662 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3663 ret = iw_cm_reject(id_priv->cm_id.iw,
3664 private_data, private_data_len);
3670 EXPORT_SYMBOL(rdma_reject);
3672 int rdma_disconnect(struct rdma_cm_id *id)
3674 struct rdma_id_private *id_priv;
3677 id_priv = container_of(id, struct rdma_id_private, id);
3678 if (!id_priv->cm_id.ib)
3681 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3682 ret = cma_modify_qp_err(id_priv);
3685 /* Initiate or respond to a disconnect. */
3686 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3687 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3688 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3689 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3696 EXPORT_SYMBOL(rdma_disconnect);
3698 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3700 struct rdma_id_private *id_priv;
3701 struct cma_multicast *mc = multicast->context;
3702 struct rdma_cm_event event;
3705 id_priv = mc->id_priv;
3706 mutex_lock(&id_priv->handler_mutex);
3707 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
3708 id_priv->state != RDMA_CM_ADDR_RESOLVED)
3712 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3713 mutex_lock(&id_priv->qp_mutex);
3714 if (!status && id_priv->id.qp)
3715 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3716 be16_to_cpu(multicast->rec.mlid));
3717 mutex_unlock(&id_priv->qp_mutex);
3719 memset(&event, 0, sizeof event);
3720 event.status = status;
3721 event.param.ud.private_data = mc->context;
3723 struct rdma_dev_addr *dev_addr =
3724 &id_priv->id.route.addr.dev_addr;
3725 struct net_device *ndev =
3726 dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
3727 enum ib_gid_type gid_type =
3728 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3729 rdma_start_port(id_priv->cma_dev->device)];
3731 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3732 ib_init_ah_from_mcmember(id_priv->id.device,
3733 id_priv->id.port_num, &multicast->rec,
3735 &event.param.ud.ah_attr);
3736 event.param.ud.qp_num = 0xFFFFFF;
3737 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3741 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3743 ret = id_priv->id.event_handler(&id_priv->id, &event);
3745 cma_exch(id_priv, RDMA_CM_DESTROYING);
3746 mutex_unlock(&id_priv->handler_mutex);
3747 rdma_destroy_id(&id_priv->id);
3752 mutex_unlock(&id_priv->handler_mutex);
3756 static void cma_set_mgid(struct rdma_id_private *id_priv,
3757 struct sockaddr *addr, union ib_gid *mgid)
3759 unsigned char mc_map[MAX_ADDR_LEN];
3760 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3761 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3762 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3764 if (cma_any_addr(addr)) {
3765 memset(mgid, 0, sizeof *mgid);
3766 } else if ((addr->sa_family == AF_INET6) &&
3767 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3769 /* IPv6 address is an SA assigned MGID. */
3770 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3771 } else if (addr->sa_family == AF_IB) {
3772 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3773 } else if (addr->sa_family == AF_INET6) {
3774 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3775 if (id_priv->id.ps == RDMA_PS_UDP)
3776 mc_map[7] = 0x01; /* Use RDMA CM signature */
3777 *mgid = *(union ib_gid *) (mc_map + 4);
3779 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3780 if (id_priv->id.ps == RDMA_PS_UDP)
3781 mc_map[7] = 0x01; /* Use RDMA CM signature */
3782 *mgid = *(union ib_gid *) (mc_map + 4);
3786 static void cma_query_sa_classport_info_cb(int status,
3787 struct ib_class_port_info *rec,
3790 struct class_port_info_context *cb_ctx = context;
3794 if (status || !rec) {
3795 pr_debug("RDMA CM: %s port %u failed query ClassPortInfo status: %d\n",
3796 cb_ctx->device->name, cb_ctx->port_num, status);
3800 memcpy(cb_ctx->class_port_info, rec, sizeof(struct ib_class_port_info));
3803 complete(&cb_ctx->done);
3806 static int cma_query_sa_classport_info(struct ib_device *device, u8 port_num,
3807 struct ib_class_port_info *class_port_info)
3809 struct class_port_info_context *cb_ctx;
3812 cb_ctx = kmalloc(sizeof(*cb_ctx), GFP_KERNEL);
3816 cb_ctx->device = device;
3817 cb_ctx->class_port_info = class_port_info;
3818 cb_ctx->port_num = port_num;
3819 init_completion(&cb_ctx->done);
3821 ret = ib_sa_classport_info_rec_query(&sa_client, device, port_num,
3822 CMA_QUERY_CLASSPORT_INFO_TIMEOUT,
3823 GFP_KERNEL, cma_query_sa_classport_info_cb,
3824 cb_ctx, &cb_ctx->sa_query);
3826 pr_err("RDMA CM: %s port %u failed to send ClassPortInfo query, ret: %d\n",
3827 device->name, port_num, ret);
3831 wait_for_completion(&cb_ctx->done);
3838 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3839 struct cma_multicast *mc)
3841 struct ib_sa_mcmember_rec rec;
3842 struct ib_class_port_info class_port_info;
3843 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3844 ib_sa_comp_mask comp_mask;
3847 ib_addr_get_mgid(dev_addr, &rec.mgid);
3848 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3853 ret = cma_set_qkey(id_priv, 0);
3857 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3858 rec.qkey = cpu_to_be32(id_priv->qkey);
3859 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3860 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3861 rec.join_state = mc->join_state;
3863 if (rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) {
3864 ret = cma_query_sa_classport_info(id_priv->id.device,
3865 id_priv->id.port_num,
3871 if (!(ib_get_cpi_capmask2(&class_port_info) &
3872 IB_SA_CAP_MASK2_SENDONLY_FULL_MEM_SUPPORT)) {
3873 pr_warn("RDMA CM: %s port %u Unable to multicast join\n"
3874 "RDMA CM: SM doesn't support Send Only Full Member option\n",
3875 id_priv->id.device->name, id_priv->id.port_num);
3880 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3881 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3882 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3883 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3884 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3886 if (id_priv->id.ps == RDMA_PS_IPOIB)
3887 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3888 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3889 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3890 IB_SA_MCMEMBER_REC_MTU |
3891 IB_SA_MCMEMBER_REC_HOP_LIMIT;
3893 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3894 id_priv->id.port_num, &rec,
3895 comp_mask, GFP_KERNEL,
3896 cma_ib_mc_handler, mc);
3897 return PTR_ERR_OR_ZERO(mc->multicast.ib);
3900 static void iboe_mcast_work_handler(struct work_struct *work)
3902 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3903 struct cma_multicast *mc = mw->mc;
3904 struct ib_sa_multicast *m = mc->multicast.ib;
3906 mc->multicast.ib->context = mc;
3907 cma_ib_mc_handler(0, m);
3908 kref_put(&mc->mcref, release_mc);
3912 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3914 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3915 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3917 if (cma_any_addr(addr)) {
3918 memset(mgid, 0, sizeof *mgid);
3919 } else if (addr->sa_family == AF_INET6) {
3920 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3922 mgid->raw[0] = 0xff;
3923 mgid->raw[1] = 0x0e;
3932 mgid->raw[10] = 0xff;
3933 mgid->raw[11] = 0xff;
3934 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3938 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3939 struct cma_multicast *mc)
3941 struct iboe_mcast_work *work;
3942 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3944 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3945 struct net_device *ndev = NULL;
3946 enum ib_gid_type gid_type;
3949 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
3951 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3954 work = kzalloc(sizeof *work, GFP_KERNEL);
3958 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3959 if (!mc->multicast.ib) {
3964 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3966 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3967 if (id_priv->id.ps == RDMA_PS_UDP)
3968 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3970 if (dev_addr->bound_dev_if)
3971 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
3976 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3977 mc->multicast.ib->rec.hop_limit = 1;
3978 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->if_mtu);
3980 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
3981 rdma_start_port(id_priv->cma_dev->device)];
3982 if (addr->sa_family == AF_INET) {
3983 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
3984 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
3986 mc->igmp_joined = true;
3990 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
3994 if (err || !mc->multicast.ib->rec.mtu) {
3999 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4000 &mc->multicast.ib->rec.port_gid);
4003 INIT_WORK(&work->work, iboe_mcast_work_handler);
4004 kref_get(&mc->mcref);
4005 queue_work(cma_wq, &work->work);
4010 kfree(mc->multicast.ib);
4016 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4017 u8 join_state, void *context)
4019 struct rdma_id_private *id_priv;
4020 struct cma_multicast *mc;
4023 id_priv = container_of(id, struct rdma_id_private, id);
4024 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4025 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4028 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4032 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4033 mc->context = context;
4034 mc->id_priv = id_priv;
4035 mc->igmp_joined = false;
4036 mc->join_state = join_state;
4037 spin_lock(&id_priv->lock);
4038 list_add(&mc->list, &id_priv->mc_list);
4039 spin_unlock(&id_priv->lock);
4041 if (rdma_protocol_roce(id->device, id->port_num)) {
4042 kref_init(&mc->mcref);
4043 ret = cma_iboe_join_multicast(id_priv, mc);
4044 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
4045 ret = cma_join_ib_multicast(id_priv, mc);
4050 spin_lock_irq(&id_priv->lock);
4051 list_del(&mc->list);
4052 spin_unlock_irq(&id_priv->lock);
4057 EXPORT_SYMBOL(rdma_join_multicast);
4059 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4061 struct rdma_id_private *id_priv;
4062 struct cma_multicast *mc;
4064 id_priv = container_of(id, struct rdma_id_private, id);
4065 spin_lock_irq(&id_priv->lock);
4066 list_for_each_entry(mc, &id_priv->mc_list, list) {
4067 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4068 list_del(&mc->list);
4069 spin_unlock_irq(&id_priv->lock);
4072 ib_detach_mcast(id->qp,
4073 &mc->multicast.ib->rec.mgid,
4074 be16_to_cpu(mc->multicast.ib->rec.mlid));
4076 BUG_ON(id_priv->cma_dev->device != id->device);
4078 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4079 ib_sa_free_multicast(mc->multicast.ib);
4081 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4082 if (mc->igmp_joined) {
4083 struct rdma_dev_addr *dev_addr =
4084 &id->route.addr.dev_addr;
4085 struct net_device *ndev = NULL;
4087 if (dev_addr->bound_dev_if)
4088 ndev = dev_get_by_index(dev_addr->net,
4089 dev_addr->bound_dev_if);
4093 mc->igmp_joined = false;
4095 kref_put(&mc->mcref, release_mc);
4100 spin_unlock_irq(&id_priv->lock);
4102 EXPORT_SYMBOL(rdma_leave_multicast);
4105 sysctl_cma_default_roce_mode(SYSCTL_HANDLER_ARGS)
4107 struct cma_device *cma_dev = arg1;
4108 const int port = arg2;
4112 strlcpy(buf, ib_cache_gid_type_str(
4113 cma_get_default_gid_type(cma_dev, port)), sizeof(buf));
4115 error = sysctl_handle_string(oidp, buf, sizeof(buf), req);
4116 if (error != 0 || req->newptr == NULL)
4119 error = ib_cache_gid_parse_type_str(buf);
4125 cma_set_default_gid_type(cma_dev, port, error);
4131 static void cma_add_one(struct ib_device *device)
4133 struct cma_device *cma_dev;
4134 struct rdma_id_private *id_priv;
4136 unsigned long supported_gids = 0;
4138 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4142 sysctl_ctx_init(&cma_dev->sysctl_ctx);
4144 cma_dev->device = device;
4145 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4146 sizeof(*cma_dev->default_gid_type),
4148 if (!cma_dev->default_gid_type) {
4152 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4153 supported_gids = roce_gid_type_mask_support(device, i);
4154 WARN_ON(!supported_gids);
4155 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4156 find_first_bit(&supported_gids, BITS_PER_LONG);
4159 init_completion(&cma_dev->comp);
4160 atomic_set(&cma_dev->refcount, 1);
4161 INIT_LIST_HEAD(&cma_dev->id_list);
4162 ib_set_client_data(device, &cma_client, cma_dev);
4165 list_add_tail(&cma_dev->list, &dev_list);
4166 list_for_each_entry(id_priv, &listen_any_list, list)
4167 cma_listen_on_dev(id_priv, cma_dev);
4168 mutex_unlock(&lock);
4170 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4173 snprintf(buf, sizeof(buf), "default_roce_mode_port%d", i);
4175 (void) SYSCTL_ADD_PROC(&cma_dev->sysctl_ctx,
4176 SYSCTL_CHILDREN(device->ports_parent->parent->oidp),
4177 OID_AUTO, buf, CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_MPSAFE,
4178 cma_dev, i, &sysctl_cma_default_roce_mode, "A",
4179 "Default RoCE mode. Valid values: IB/RoCE v1 and RoCE v2");
4183 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4185 struct rdma_cm_event event;
4186 enum rdma_cm_state state;
4189 /* Record that we want to remove the device */
4190 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4191 if (state == RDMA_CM_DESTROYING)
4194 cma_cancel_operation(id_priv, state);
4195 mutex_lock(&id_priv->handler_mutex);
4197 /* Check for destruction from another callback. */
4198 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4201 memset(&event, 0, sizeof event);
4202 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4203 ret = id_priv->id.event_handler(&id_priv->id, &event);
4205 mutex_unlock(&id_priv->handler_mutex);
4209 static void cma_process_remove(struct cma_device *cma_dev)
4211 struct rdma_id_private *id_priv;
4215 while (!list_empty(&cma_dev->id_list)) {
4216 id_priv = list_entry(cma_dev->id_list.next,
4217 struct rdma_id_private, list);
4219 list_del(&id_priv->listen_list);
4220 list_del_init(&id_priv->list);
4221 atomic_inc(&id_priv->refcount);
4222 mutex_unlock(&lock);
4224 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4225 cma_deref_id(id_priv);
4227 rdma_destroy_id(&id_priv->id);
4231 mutex_unlock(&lock);
4233 cma_deref_dev(cma_dev);
4234 wait_for_completion(&cma_dev->comp);
4237 static void cma_remove_one(struct ib_device *device, void *client_data)
4239 struct cma_device *cma_dev = client_data;
4245 list_del(&cma_dev->list);
4246 mutex_unlock(&lock);
4248 cma_process_remove(cma_dev);
4249 sysctl_ctx_free(&cma_dev->sysctl_ctx);
4250 kfree(cma_dev->default_gid_type);
4254 static void cma_init_vnet(void *arg)
4256 struct cma_pernet *pernet = &VNET(cma_pernet);
4258 idr_init(&pernet->tcp_ps);
4259 idr_init(&pernet->udp_ps);
4260 idr_init(&pernet->ipoib_ps);
4261 idr_init(&pernet->ib_ps);
4263 VNET_SYSINIT(cma_init_vnet, SI_SUB_OFED_MODINIT - 1, SI_ORDER_FIRST, cma_init_vnet, NULL);
4265 static void cma_destroy_vnet(void *arg)
4267 struct cma_pernet *pernet = &VNET(cma_pernet);
4269 idr_destroy(&pernet->tcp_ps);
4270 idr_destroy(&pernet->udp_ps);
4271 idr_destroy(&pernet->ipoib_ps);
4272 idr_destroy(&pernet->ib_ps);
4274 VNET_SYSUNINIT(cma_destroy_vnet, SI_SUB_OFED_MODINIT - 1, SI_ORDER_SECOND, cma_destroy_vnet, NULL);
4276 static int __init cma_init(void)
4280 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4284 ib_sa_register_client(&sa_client);
4285 rdma_addr_register_client(&addr_client);
4287 ret = ib_register_client(&cma_client);
4291 cma_configfs_init();
4296 rdma_addr_unregister_client(&addr_client);
4297 ib_sa_unregister_client(&sa_client);
4298 destroy_workqueue(cma_wq);
4302 static void __exit cma_cleanup(void)
4304 cma_configfs_exit();
4305 ib_unregister_client(&cma_client);
4306 rdma_addr_unregister_client(&addr_client);
4307 ib_sa_unregister_client(&sa_client);
4308 destroy_workqueue(cma_wq);
4311 module_init(cma_init);
4312 module_exit(cma_cleanup);