2 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
3 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
4 * Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
5 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
7 * This software is available to you under a choice of one of two
8 * licenses. You may choose to be licensed under the terms of the GNU
9 * General Public License (GPL) Version 2, available from the file
10 * COPYING in the main directory of this source tree, or the
11 * OpenIB.org BSD license below:
13 * Redistribution and use in source and binary forms, with or
14 * without modification, are permitted provided that the following
17 * - Redistributions of source code must retain the above
18 * copyright notice, this list of conditions and the following
21 * - Redistributions in binary form must reproduce the above
22 * copyright notice, this list of conditions and the following
23 * disclaimer in the documentation and/or other materials
24 * provided with the distribution.
26 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
27 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
28 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
29 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
30 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
31 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
32 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/completion.h>
38 #include <linux/in6.h>
39 #include <linux/mutex.h>
40 #include <linux/random.h>
41 #include <linux/idr.h>
42 #include <linux/inetdevice.h>
43 #include <linux/slab.h>
44 #include <linux/module.h>
45 #include <net/route.h>
49 #include <net/ip_fib.h>
50 #include <net/ip6_route.h>
52 #include <rdma/rdma_cm.h>
53 #include <rdma/rdma_cm_ib.h>
54 #include <rdma/rdma_netlink.h>
56 #include <rdma/ib_cache.h>
57 #include <rdma/ib_cm.h>
58 #include <rdma/ib_sa.h>
59 #include <rdma/iw_cm.h>
61 MODULE_AUTHOR("Sean Hefty");
62 MODULE_DESCRIPTION("Generic RDMA CM Agent");
63 MODULE_LICENSE("Dual BSD/GPL");
65 #define CMA_CM_RESPONSE_TIMEOUT 20
66 #define CMA_MAX_CM_RETRIES 15
67 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
68 #define CMA_IBOE_PACKET_LIFETIME 18
70 static const char * const cma_events[] = {
71 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
72 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
73 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
74 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
75 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
76 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
77 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
78 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
79 [RDMA_CM_EVENT_REJECTED] = "rejected",
80 [RDMA_CM_EVENT_ESTABLISHED] = "established",
81 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
82 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
83 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
84 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
85 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
86 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
89 const char *rdma_event_msg(enum rdma_cm_event_type event)
93 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
94 cma_events[index] : "unrecognized event";
96 EXPORT_SYMBOL(rdma_event_msg);
98 static void cma_add_one(struct ib_device *device);
99 static void cma_remove_one(struct ib_device *device, void *client_data);
101 static struct ib_client cma_client = {
104 .remove = cma_remove_one
107 static struct ib_sa_client sa_client;
108 static struct rdma_addr_client addr_client;
109 static LIST_HEAD(dev_list);
110 static LIST_HEAD(listen_any_list);
111 static DEFINE_MUTEX(lock);
112 static struct workqueue_struct *cma_wq;
113 static DEFINE_IDR(tcp_ps);
114 static DEFINE_IDR(udp_ps);
115 static DEFINE_IDR(ipoib_ps);
116 static DEFINE_IDR(ib_ps);
118 static struct idr *cma_idr(enum rdma_port_space ps)
135 struct list_head list;
136 struct ib_device *device;
137 struct completion comp;
139 struct list_head id_list;
142 struct rdma_bind_list {
143 enum rdma_port_space ps;
144 struct hlist_head owners;
148 static int cma_ps_alloc(enum rdma_port_space ps,
149 struct rdma_bind_list *bind_list, int snum)
151 struct idr *idr = cma_idr(ps);
153 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
156 static struct rdma_bind_list *cma_ps_find(enum rdma_port_space ps, int snum)
158 struct idr *idr = cma_idr(ps);
160 return idr_find(idr, snum);
163 static void cma_ps_remove(enum rdma_port_space ps, int snum)
165 struct idr *idr = cma_idr(ps);
167 idr_remove(idr, snum);
175 * Device removal can occur at anytime, so we need extra handling to
176 * serialize notifying the user of device removal with other callbacks.
177 * We do this by disabling removal notification while a callback is in process,
178 * and reporting it after the callback completes.
180 struct rdma_id_private {
181 struct rdma_cm_id id;
183 struct rdma_bind_list *bind_list;
184 struct hlist_node node;
185 struct list_head list; /* listen_any_list or cma_device.list */
186 struct list_head listen_list; /* per device listens */
187 struct cma_device *cma_dev;
188 struct list_head mc_list;
191 enum rdma_cm_state state;
193 struct mutex qp_mutex;
195 struct completion comp;
197 struct mutex handler_mutex;
201 struct ib_sa_query *query;
219 struct cma_multicast {
220 struct rdma_id_private *id_priv;
222 struct ib_sa_multicast *ib;
224 struct list_head list;
226 struct sockaddr_storage addr;
231 struct work_struct work;
232 struct rdma_id_private *id;
233 enum rdma_cm_state old_state;
234 enum rdma_cm_state new_state;
235 struct rdma_cm_event event;
238 struct cma_ndev_work {
239 struct work_struct work;
240 struct rdma_id_private *id;
241 struct rdma_cm_event event;
244 struct iboe_mcast_work {
245 struct work_struct work;
246 struct rdma_id_private *id;
247 struct cma_multicast *mc;
260 u8 ip_version; /* IP version: 7:4 */
262 union cma_ip_addr src_addr;
263 union cma_ip_addr dst_addr;
266 #define CMA_VERSION 0x00
268 struct cma_req_info {
269 struct ib_device *device;
271 union ib_gid local_gid;
277 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
282 spin_lock_irqsave(&id_priv->lock, flags);
283 ret = (id_priv->state == comp);
284 spin_unlock_irqrestore(&id_priv->lock, flags);
288 static int cma_comp_exch(struct rdma_id_private *id_priv,
289 enum rdma_cm_state comp, enum rdma_cm_state exch)
294 spin_lock_irqsave(&id_priv->lock, flags);
295 if ((ret = (id_priv->state == comp)))
296 id_priv->state = exch;
297 spin_unlock_irqrestore(&id_priv->lock, flags);
301 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
302 enum rdma_cm_state exch)
305 enum rdma_cm_state old;
307 spin_lock_irqsave(&id_priv->lock, flags);
308 old = id_priv->state;
309 id_priv->state = exch;
310 spin_unlock_irqrestore(&id_priv->lock, flags);
314 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
316 return hdr->ip_version >> 4;
319 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
321 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
324 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
325 struct cma_device *cma_dev)
327 atomic_inc(&cma_dev->refcount);
328 id_priv->cma_dev = cma_dev;
329 id_priv->id.device = cma_dev->device;
330 id_priv->id.route.addr.dev_addr.transport =
331 rdma_node_get_transport(cma_dev->device->node_type);
332 list_add_tail(&id_priv->list, &cma_dev->id_list);
335 static inline void cma_deref_dev(struct cma_device *cma_dev)
337 if (atomic_dec_and_test(&cma_dev->refcount))
338 complete(&cma_dev->comp);
341 static inline void release_mc(struct kref *kref)
343 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
345 kfree(mc->multicast.ib);
349 static void cma_release_dev(struct rdma_id_private *id_priv)
352 list_del(&id_priv->list);
353 cma_deref_dev(id_priv->cma_dev);
354 id_priv->cma_dev = NULL;
358 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
360 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
363 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
365 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
368 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
370 return id_priv->id.route.addr.src_addr.ss_family;
373 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
375 struct ib_sa_mcmember_rec rec;
379 if (qkey && id_priv->qkey != qkey)
385 id_priv->qkey = qkey;
389 switch (id_priv->id.ps) {
392 id_priv->qkey = RDMA_UDP_QKEY;
395 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
396 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
397 id_priv->id.port_num, &rec.mgid,
400 id_priv->qkey = be32_to_cpu(rec.qkey);
408 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
410 dev_addr->dev_type = ARPHRD_INFINIBAND;
411 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
412 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
415 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
419 if (addr->sa_family != AF_IB) {
420 ret = rdma_translate_ip(addr, dev_addr, NULL);
422 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
429 static inline int cma_validate_port(struct ib_device *device, u8 port,
430 union ib_gid *gid, int dev_type)
435 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
438 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
441 ret = ib_find_cached_gid(device, gid, &found_port, NULL);
442 if (port != found_port)
448 static int cma_acquire_dev(struct rdma_id_private *id_priv,
449 struct rdma_id_private *listen_id_priv)
451 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
452 struct cma_device *cma_dev;
453 union ib_gid gid, iboe_gid, *gidp;
457 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
458 id_priv->id.ps == RDMA_PS_IPOIB)
462 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
465 memcpy(&gid, dev_addr->src_dev_addr +
466 rdma_addr_gid_offset(dev_addr), sizeof gid);
468 if (listen_id_priv) {
469 cma_dev = listen_id_priv->cma_dev;
470 port = listen_id_priv->id.port_num;
471 gidp = rdma_protocol_roce(cma_dev->device, port) ?
474 ret = cma_validate_port(cma_dev->device, port, gidp,
477 id_priv->id.port_num = port;
482 list_for_each_entry(cma_dev, &dev_list, list) {
483 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
484 if (listen_id_priv &&
485 listen_id_priv->cma_dev == cma_dev &&
486 listen_id_priv->id.port_num == port)
489 gidp = rdma_protocol_roce(cma_dev->device, port) ?
492 ret = cma_validate_port(cma_dev->device, port, gidp,
495 id_priv->id.port_num = port;
503 cma_attach_to_dev(id_priv, cma_dev);
510 * Select the source IB device and address to reach the destination IB address.
512 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
514 struct cma_device *cma_dev, *cur_dev;
515 struct sockaddr_ib *addr;
516 union ib_gid gid, sgid, *dgid;
522 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
523 dgid = (union ib_gid *) &addr->sib_addr;
524 pkey = ntohs(addr->sib_pkey);
526 list_for_each_entry(cur_dev, &dev_list, list) {
527 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
528 if (!rdma_cap_af_ib(cur_dev->device, p))
531 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
534 for (i = 0; !ib_get_cached_gid(cur_dev->device, p, i, &gid); i++) {
535 if (!memcmp(&gid, dgid, sizeof(gid))) {
538 id_priv->id.port_num = p;
542 if (!cma_dev && (gid.global.subnet_prefix ==
543 dgid->global.subnet_prefix)) {
546 id_priv->id.port_num = p;
556 cma_attach_to_dev(id_priv, cma_dev);
557 addr = (struct sockaddr_ib *) cma_src_addr(id_priv);
558 memcpy(&addr->sib_addr, &sgid, sizeof sgid);
559 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
563 static void cma_deref_id(struct rdma_id_private *id_priv)
565 if (atomic_dec_and_test(&id_priv->refcount))
566 complete(&id_priv->comp);
569 static int cma_disable_callback(struct rdma_id_private *id_priv,
570 enum rdma_cm_state state)
572 mutex_lock(&id_priv->handler_mutex);
573 if (id_priv->state != state) {
574 mutex_unlock(&id_priv->handler_mutex);
580 struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
581 void *context, enum rdma_port_space ps,
582 enum ib_qp_type qp_type)
584 struct rdma_id_private *id_priv;
586 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
588 return ERR_PTR(-ENOMEM);
590 id_priv->owner = task_pid_nr(current);
591 id_priv->state = RDMA_CM_IDLE;
592 id_priv->id.context = context;
593 id_priv->id.event_handler = event_handler;
595 id_priv->id.qp_type = qp_type;
596 spin_lock_init(&id_priv->lock);
597 mutex_init(&id_priv->qp_mutex);
598 init_completion(&id_priv->comp);
599 atomic_set(&id_priv->refcount, 1);
600 mutex_init(&id_priv->handler_mutex);
601 INIT_LIST_HEAD(&id_priv->listen_list);
602 INIT_LIST_HEAD(&id_priv->mc_list);
603 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
607 EXPORT_SYMBOL(rdma_create_id);
609 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
611 struct ib_qp_attr qp_attr;
612 int qp_attr_mask, ret;
614 qp_attr.qp_state = IB_QPS_INIT;
615 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
619 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
623 qp_attr.qp_state = IB_QPS_RTR;
624 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
628 qp_attr.qp_state = IB_QPS_RTS;
630 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
635 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
637 struct ib_qp_attr qp_attr;
638 int qp_attr_mask, ret;
640 qp_attr.qp_state = IB_QPS_INIT;
641 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
645 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
648 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
649 struct ib_qp_init_attr *qp_init_attr)
651 struct rdma_id_private *id_priv;
655 id_priv = container_of(id, struct rdma_id_private, id);
656 if (id->device != pd->device)
659 qp = ib_create_qp(pd, qp_init_attr);
663 if (id->qp_type == IB_QPT_UD)
664 ret = cma_init_ud_qp(id_priv, qp);
666 ret = cma_init_conn_qp(id_priv, qp);
671 id_priv->qp_num = qp->qp_num;
672 id_priv->srq = (qp->srq != NULL);
678 EXPORT_SYMBOL(rdma_create_qp);
680 void rdma_destroy_qp(struct rdma_cm_id *id)
682 struct rdma_id_private *id_priv;
684 id_priv = container_of(id, struct rdma_id_private, id);
685 mutex_lock(&id_priv->qp_mutex);
686 ib_destroy_qp(id_priv->id.qp);
687 id_priv->id.qp = NULL;
688 mutex_unlock(&id_priv->qp_mutex);
690 EXPORT_SYMBOL(rdma_destroy_qp);
692 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
693 struct rdma_conn_param *conn_param)
695 struct ib_qp_attr qp_attr;
696 int qp_attr_mask, ret;
699 mutex_lock(&id_priv->qp_mutex);
700 if (!id_priv->id.qp) {
705 /* Need to update QP attributes from default values. */
706 qp_attr.qp_state = IB_QPS_INIT;
707 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
711 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
715 qp_attr.qp_state = IB_QPS_RTR;
716 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
720 ret = ib_query_gid(id_priv->id.device, id_priv->id.port_num,
721 qp_attr.ah_attr.grh.sgid_index, &sgid);
725 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
727 if (rdma_protocol_roce(id_priv->id.device, id_priv->id.port_num)) {
728 ret = rdma_addr_find_smac_by_sgid(&sgid, qp_attr.smac, NULL);
734 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
735 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
737 mutex_unlock(&id_priv->qp_mutex);
741 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
742 struct rdma_conn_param *conn_param)
744 struct ib_qp_attr qp_attr;
745 int qp_attr_mask, ret;
747 mutex_lock(&id_priv->qp_mutex);
748 if (!id_priv->id.qp) {
753 qp_attr.qp_state = IB_QPS_RTS;
754 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
759 qp_attr.max_rd_atomic = conn_param->initiator_depth;
760 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
762 mutex_unlock(&id_priv->qp_mutex);
766 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
768 struct ib_qp_attr qp_attr;
771 mutex_lock(&id_priv->qp_mutex);
772 if (!id_priv->id.qp) {
777 qp_attr.qp_state = IB_QPS_ERR;
778 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
780 mutex_unlock(&id_priv->qp_mutex);
784 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
785 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
787 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
791 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
794 pkey = ib_addr_get_pkey(dev_addr);
796 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
797 pkey, &qp_attr->pkey_index);
801 qp_attr->port_num = id_priv->id.port_num;
802 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
804 if (id_priv->id.qp_type == IB_QPT_UD) {
805 ret = cma_set_qkey(id_priv, 0);
809 qp_attr->qkey = id_priv->qkey;
810 *qp_attr_mask |= IB_QP_QKEY;
812 qp_attr->qp_access_flags = 0;
813 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
818 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
821 struct rdma_id_private *id_priv;
824 id_priv = container_of(id, struct rdma_id_private, id);
825 if (rdma_cap_ib_cm(id->device, id->port_num)) {
826 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
827 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
829 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
832 if (qp_attr->qp_state == IB_QPS_RTR)
833 qp_attr->rq_psn = id_priv->seq_num;
834 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
835 if (!id_priv->cm_id.iw) {
836 qp_attr->qp_access_flags = 0;
837 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
839 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
846 EXPORT_SYMBOL(rdma_init_qp_attr);
848 static inline int cma_zero_addr(struct sockaddr *addr)
850 switch (addr->sa_family) {
852 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
854 return ipv6_addr_any(&((struct sockaddr_in6 *) addr)->sin6_addr);
856 return ib_addr_any(&((struct sockaddr_ib *) addr)->sib_addr);
862 static inline int cma_loopback_addr(struct sockaddr *addr)
864 switch (addr->sa_family) {
866 return ipv4_is_loopback(((struct sockaddr_in *) addr)->sin_addr.s_addr);
868 return ipv6_addr_loopback(&((struct sockaddr_in6 *) addr)->sin6_addr);
870 return ib_addr_loopback(&((struct sockaddr_ib *) addr)->sib_addr);
876 static inline int cma_any_addr(struct sockaddr *addr)
878 return cma_zero_addr(addr) || cma_loopback_addr(addr);
881 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
883 if (src->sa_family != dst->sa_family)
886 switch (src->sa_family) {
888 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
889 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
891 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
892 &((struct sockaddr_in6 *) dst)->sin6_addr);
894 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
895 &((struct sockaddr_ib *) dst)->sib_addr);
899 static __be16 cma_port(struct sockaddr *addr)
901 struct sockaddr_ib *sib;
903 switch (addr->sa_family) {
905 return ((struct sockaddr_in *) addr)->sin_port;
907 return ((struct sockaddr_in6 *) addr)->sin6_port;
909 sib = (struct sockaddr_ib *) addr;
910 return htons((u16) (be64_to_cpu(sib->sib_sid) &
911 be64_to_cpu(sib->sib_sid_mask)));
917 static inline int cma_any_port(struct sockaddr *addr)
919 return !cma_port(addr);
922 static void cma_save_ib_info(struct sockaddr *src_addr,
923 struct sockaddr *dst_addr,
924 struct rdma_cm_id *listen_id,
925 struct ib_sa_path_rec *path)
927 struct sockaddr_ib *listen_ib, *ib;
929 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
931 ib = (struct sockaddr_ib *)src_addr;
932 ib->sib_family = AF_IB;
934 ib->sib_pkey = path->pkey;
935 ib->sib_flowinfo = path->flow_label;
936 memcpy(&ib->sib_addr, &path->sgid, 16);
937 ib->sib_sid = path->service_id;
938 ib->sib_scope_id = 0;
940 ib->sib_pkey = listen_ib->sib_pkey;
941 ib->sib_flowinfo = listen_ib->sib_flowinfo;
942 ib->sib_addr = listen_ib->sib_addr;
943 ib->sib_sid = listen_ib->sib_sid;
944 ib->sib_scope_id = listen_ib->sib_scope_id;
946 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
949 ib = (struct sockaddr_ib *)dst_addr;
950 ib->sib_family = AF_IB;
952 ib->sib_pkey = path->pkey;
953 ib->sib_flowinfo = path->flow_label;
954 memcpy(&ib->sib_addr, &path->dgid, 16);
959 static void cma_save_ip4_info(struct sockaddr *src_addr,
960 struct sockaddr *dst_addr,
964 struct sockaddr_in *ip4;
967 ip4 = (struct sockaddr_in *)src_addr;
968 ip4->sin_family = AF_INET;
969 ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr;
970 ip4->sin_port = local_port;
974 ip4 = (struct sockaddr_in *)dst_addr;
975 ip4->sin_family = AF_INET;
976 ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr;
977 ip4->sin_port = hdr->port;
981 static void cma_save_ip6_info(struct sockaddr *src_addr,
982 struct sockaddr *dst_addr,
986 struct sockaddr_in6 *ip6;
989 ip6 = (struct sockaddr_in6 *)src_addr;
990 ip6->sin6_family = AF_INET6;
991 ip6->sin6_addr = hdr->dst_addr.ip6;
992 ip6->sin6_port = local_port;
996 ip6 = (struct sockaddr_in6 *)dst_addr;
997 ip6->sin6_family = AF_INET6;
998 ip6->sin6_addr = hdr->src_addr.ip6;
999 ip6->sin6_port = hdr->port;
1003 static u16 cma_port_from_service_id(__be64 service_id)
1005 return (u16)be64_to_cpu(service_id);
1008 static int cma_save_ip_info(struct sockaddr *src_addr,
1009 struct sockaddr *dst_addr,
1010 struct ib_cm_event *ib_event,
1013 struct cma_hdr *hdr;
1016 hdr = ib_event->private_data;
1017 if (hdr->cma_version != CMA_VERSION)
1020 port = htons(cma_port_from_service_id(service_id));
1022 switch (cma_get_ip_ver(hdr)) {
1024 cma_save_ip4_info(src_addr, dst_addr, hdr, port);
1027 cma_save_ip6_info(src_addr, dst_addr, hdr, port);
1030 return -EAFNOSUPPORT;
1036 static int cma_save_net_info(struct sockaddr *src_addr,
1037 struct sockaddr *dst_addr,
1038 struct rdma_cm_id *listen_id,
1039 struct ib_cm_event *ib_event,
1040 sa_family_t sa_family, __be64 service_id)
1042 if (sa_family == AF_IB) {
1043 if (ib_event->event == IB_CM_REQ_RECEIVED)
1044 cma_save_ib_info(src_addr, dst_addr, listen_id,
1045 ib_event->param.req_rcvd.primary_path);
1046 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1047 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1051 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1054 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1055 struct cma_req_info *req)
1057 const struct ib_cm_req_event_param *req_param =
1058 &ib_event->param.req_rcvd;
1059 const struct ib_cm_sidr_req_event_param *sidr_param =
1060 &ib_event->param.sidr_req_rcvd;
1062 switch (ib_event->event) {
1063 case IB_CM_REQ_RECEIVED:
1064 req->device = req_param->listen_id->device;
1065 req->port = req_param->port;
1066 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1067 sizeof(req->local_gid));
1068 req->has_gid = true;
1069 req->service_id = req_param->primary_path->service_id;
1070 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1072 case IB_CM_SIDR_REQ_RECEIVED:
1073 req->device = sidr_param->listen_id->device;
1074 req->port = sidr_param->port;
1075 req->has_gid = false;
1076 req->service_id = sidr_param->service_id;
1077 req->pkey = sidr_param->pkey;
1086 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1087 const struct sockaddr_in *dst_addr,
1088 const struct sockaddr_in *src_addr)
1090 __be32 daddr = dst_addr->sin_addr.s_addr,
1091 saddr = src_addr->sin_addr.s_addr;
1092 struct fib_result res;
1097 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1098 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1099 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1100 ipv4_is_loopback(saddr))
1103 memset(&fl4, 0, sizeof(fl4));
1104 fl4.flowi4_iif = net_dev->ifindex;
1109 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1113 ret = FIB_RES_DEV(res) == net_dev;
1119 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1120 const struct sockaddr_in6 *dst_addr,
1121 const struct sockaddr_in6 *src_addr)
1123 #if IS_ENABLED(CONFIG_IPV6)
1124 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1125 IPV6_ADDR_LINKLOCAL;
1126 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1127 &src_addr->sin6_addr, net_dev->ifindex,
1134 ret = rt->rt6i_idev->dev == net_dev;
1143 static bool validate_net_dev(struct net_device *net_dev,
1144 const struct sockaddr *daddr,
1145 const struct sockaddr *saddr)
1147 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1148 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1149 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1150 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1152 switch (daddr->sa_family) {
1154 return saddr->sa_family == AF_INET &&
1155 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1158 return saddr->sa_family == AF_INET6 &&
1159 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1166 static struct net_device *cma_get_net_dev(struct ib_cm_event *ib_event,
1167 const struct cma_req_info *req)
1169 struct sockaddr_storage listen_addr_storage, src_addr_storage;
1170 struct sockaddr *listen_addr = (struct sockaddr *)&listen_addr_storage,
1171 *src_addr = (struct sockaddr *)&src_addr_storage;
1172 struct net_device *net_dev;
1173 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1176 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1179 return ERR_PTR(err);
1181 net_dev = ib_get_net_dev_by_params(req->device, req->port, req->pkey,
1184 return ERR_PTR(-ENODEV);
1186 if (!validate_net_dev(net_dev, listen_addr, src_addr)) {
1188 return ERR_PTR(-EHOSTUNREACH);
1194 static enum rdma_port_space rdma_ps_from_service_id(__be64 service_id)
1196 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1199 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1200 const struct cma_hdr *hdr)
1202 struct sockaddr *addr = cma_src_addr(id_priv);
1204 struct in6_addr ip6_addr;
1206 if (cma_any_addr(addr) && !id_priv->afonly)
1209 switch (addr->sa_family) {
1211 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1212 if (cma_get_ip_ver(hdr) != 4)
1214 if (!cma_any_addr(addr) &&
1215 hdr->dst_addr.ip4.addr != ip4_addr)
1219 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1220 if (cma_get_ip_ver(hdr) != 6)
1222 if (!cma_any_addr(addr) &&
1223 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1235 static bool cma_protocol_roce_dev_port(struct ib_device *device, int port_num)
1237 enum rdma_link_layer ll = rdma_port_get_link_layer(device, port_num);
1238 enum rdma_transport_type transport =
1239 rdma_node_get_transport(device->node_type);
1241 return ll == IB_LINK_LAYER_ETHERNET && transport == RDMA_TRANSPORT_IB;
1244 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1246 struct ib_device *device = id->device;
1247 const int port_num = id->port_num ?: rdma_start_port(device);
1249 return cma_protocol_roce_dev_port(device, port_num);
1252 static bool cma_match_net_dev(const struct rdma_id_private *id_priv,
1253 const struct net_device *net_dev)
1255 const struct rdma_addr *addr = &id_priv->id.route.addr;
1258 /* This request is an AF_IB request or a RoCE request */
1259 return addr->src_addr.ss_family == AF_IB ||
1260 cma_protocol_roce(&id_priv->id);
1262 return !addr->dev_addr.bound_dev_if ||
1263 (net_eq(dev_net(net_dev), &init_net) &&
1264 addr->dev_addr.bound_dev_if == net_dev->ifindex);
1267 static struct rdma_id_private *cma_find_listener(
1268 const struct rdma_bind_list *bind_list,
1269 const struct ib_cm_id *cm_id,
1270 const struct ib_cm_event *ib_event,
1271 const struct cma_req_info *req,
1272 const struct net_device *net_dev)
1274 struct rdma_id_private *id_priv, *id_priv_dev;
1277 return ERR_PTR(-EINVAL);
1279 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1280 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1281 if (id_priv->id.device == cm_id->device &&
1282 cma_match_net_dev(id_priv, net_dev))
1284 list_for_each_entry(id_priv_dev,
1285 &id_priv->listen_list,
1287 if (id_priv_dev->id.device == cm_id->device &&
1288 cma_match_net_dev(id_priv_dev, net_dev))
1294 return ERR_PTR(-EINVAL);
1297 static struct rdma_id_private *cma_id_from_event(struct ib_cm_id *cm_id,
1298 struct ib_cm_event *ib_event,
1299 struct net_device **net_dev)
1301 struct cma_req_info req;
1302 struct rdma_bind_list *bind_list;
1303 struct rdma_id_private *id_priv;
1306 err = cma_save_req_info(ib_event, &req);
1308 return ERR_PTR(err);
1310 *net_dev = cma_get_net_dev(ib_event, &req);
1311 if (IS_ERR(*net_dev)) {
1312 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1313 /* Assuming the protocol is AF_IB */
1315 } else if (cma_protocol_roce_dev_port(req.device, req.port)) {
1316 /* TODO find the net dev matching the request parameters
1317 * through the RoCE GID table */
1320 return ERR_CAST(*net_dev);
1324 bind_list = cma_ps_find(rdma_ps_from_service_id(req.service_id),
1325 cma_port_from_service_id(req.service_id));
1326 id_priv = cma_find_listener(bind_list, cm_id, ib_event, &req, *net_dev);
1327 if (IS_ERR(id_priv) && *net_dev) {
1335 static inline int cma_user_data_offset(struct rdma_id_private *id_priv)
1337 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1340 static void cma_cancel_route(struct rdma_id_private *id_priv)
1342 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1344 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1348 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1350 struct rdma_id_private *dev_id_priv;
1353 * Remove from listen_any_list to prevent added devices from spawning
1354 * additional listen requests.
1357 list_del(&id_priv->list);
1359 while (!list_empty(&id_priv->listen_list)) {
1360 dev_id_priv = list_entry(id_priv->listen_list.next,
1361 struct rdma_id_private, listen_list);
1362 /* sync with device removal to avoid duplicate destruction */
1363 list_del_init(&dev_id_priv->list);
1364 list_del(&dev_id_priv->listen_list);
1365 mutex_unlock(&lock);
1367 rdma_destroy_id(&dev_id_priv->id);
1370 mutex_unlock(&lock);
1373 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1374 enum rdma_cm_state state)
1377 case RDMA_CM_ADDR_QUERY:
1378 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1380 case RDMA_CM_ROUTE_QUERY:
1381 cma_cancel_route(id_priv);
1383 case RDMA_CM_LISTEN:
1384 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1385 cma_cancel_listens(id_priv);
1392 static void cma_release_port(struct rdma_id_private *id_priv)
1394 struct rdma_bind_list *bind_list = id_priv->bind_list;
1400 hlist_del(&id_priv->node);
1401 if (hlist_empty(&bind_list->owners)) {
1402 cma_ps_remove(bind_list->ps, bind_list->port);
1405 mutex_unlock(&lock);
1408 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1410 struct cma_multicast *mc;
1412 while (!list_empty(&id_priv->mc_list)) {
1413 mc = container_of(id_priv->mc_list.next,
1414 struct cma_multicast, list);
1415 list_del(&mc->list);
1416 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1417 id_priv->id.port_num)) {
1418 ib_sa_free_multicast(mc->multicast.ib);
1421 kref_put(&mc->mcref, release_mc);
1425 void rdma_destroy_id(struct rdma_cm_id *id)
1427 struct rdma_id_private *id_priv;
1428 enum rdma_cm_state state;
1430 id_priv = container_of(id, struct rdma_id_private, id);
1431 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1432 cma_cancel_operation(id_priv, state);
1435 * Wait for any active callback to finish. New callbacks will find
1436 * the id_priv state set to destroying and abort.
1438 mutex_lock(&id_priv->handler_mutex);
1439 mutex_unlock(&id_priv->handler_mutex);
1441 if (id_priv->cma_dev) {
1442 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1443 if (id_priv->cm_id.ib)
1444 ib_destroy_cm_id(id_priv->cm_id.ib);
1445 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1446 if (id_priv->cm_id.iw)
1447 iw_destroy_cm_id(id_priv->cm_id.iw);
1449 cma_leave_mc_groups(id_priv);
1450 cma_release_dev(id_priv);
1453 cma_release_port(id_priv);
1454 cma_deref_id(id_priv);
1455 wait_for_completion(&id_priv->comp);
1457 if (id_priv->internal_id)
1458 cma_deref_id(id_priv->id.context);
1460 kfree(id_priv->id.route.path_rec);
1463 EXPORT_SYMBOL(rdma_destroy_id);
1465 static int cma_rep_recv(struct rdma_id_private *id_priv)
1469 ret = cma_modify_qp_rtr(id_priv, NULL);
1473 ret = cma_modify_qp_rts(id_priv, NULL);
1477 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1483 cma_modify_qp_err(id_priv);
1484 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1489 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1490 struct ib_cm_rep_event_param *rep_data,
1493 event->param.conn.private_data = private_data;
1494 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1495 event->param.conn.responder_resources = rep_data->responder_resources;
1496 event->param.conn.initiator_depth = rep_data->initiator_depth;
1497 event->param.conn.flow_control = rep_data->flow_control;
1498 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1499 event->param.conn.srq = rep_data->srq;
1500 event->param.conn.qp_num = rep_data->remote_qpn;
1503 static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1505 struct rdma_id_private *id_priv = cm_id->context;
1506 struct rdma_cm_event event;
1509 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1510 cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
1511 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1512 cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
1515 memset(&event, 0, sizeof event);
1516 switch (ib_event->event) {
1517 case IB_CM_REQ_ERROR:
1518 case IB_CM_REP_ERROR:
1519 event.event = RDMA_CM_EVENT_UNREACHABLE;
1520 event.status = -ETIMEDOUT;
1522 case IB_CM_REP_RECEIVED:
1523 if (id_priv->id.qp) {
1524 event.status = cma_rep_recv(id_priv);
1525 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1526 RDMA_CM_EVENT_ESTABLISHED;
1528 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1530 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1531 ib_event->private_data);
1533 case IB_CM_RTU_RECEIVED:
1534 case IB_CM_USER_ESTABLISHED:
1535 event.event = RDMA_CM_EVENT_ESTABLISHED;
1537 case IB_CM_DREQ_ERROR:
1538 event.status = -ETIMEDOUT; /* fall through */
1539 case IB_CM_DREQ_RECEIVED:
1540 case IB_CM_DREP_RECEIVED:
1541 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1542 RDMA_CM_DISCONNECT))
1544 event.event = RDMA_CM_EVENT_DISCONNECTED;
1546 case IB_CM_TIMEWAIT_EXIT:
1547 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1549 case IB_CM_MRA_RECEIVED:
1552 case IB_CM_REJ_RECEIVED:
1553 cma_modify_qp_err(id_priv);
1554 event.status = ib_event->param.rej_rcvd.reason;
1555 event.event = RDMA_CM_EVENT_REJECTED;
1556 event.param.conn.private_data = ib_event->private_data;
1557 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1560 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
1565 ret = id_priv->id.event_handler(&id_priv->id, &event);
1567 /* Destroy the CM ID by returning a non-zero value. */
1568 id_priv->cm_id.ib = NULL;
1569 cma_exch(id_priv, RDMA_CM_DESTROYING);
1570 mutex_unlock(&id_priv->handler_mutex);
1571 rdma_destroy_id(&id_priv->id);
1575 mutex_unlock(&id_priv->handler_mutex);
1579 static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
1580 struct ib_cm_event *ib_event,
1581 struct net_device *net_dev)
1583 struct rdma_id_private *id_priv;
1584 struct rdma_cm_id *id;
1585 struct rdma_route *rt;
1586 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1587 const __be64 service_id =
1588 ib_event->param.req_rcvd.primary_path->service_id;
1591 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1592 listen_id->ps, ib_event->param.req_rcvd.qp_type);
1596 id_priv = container_of(id, struct rdma_id_private, id);
1597 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1598 (struct sockaddr *)&id->route.addr.dst_addr,
1599 listen_id, ib_event, ss_family, service_id))
1603 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
1604 rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
1609 rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
1610 if (rt->num_paths == 2)
1611 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
1614 ret = rdma_copy_addr(&rt->addr.dev_addr, net_dev, NULL);
1618 if (!cma_protocol_roce(listen_id) &&
1619 cma_any_addr(cma_src_addr(id_priv))) {
1620 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
1621 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
1622 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
1623 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
1624 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
1629 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
1631 id_priv->state = RDMA_CM_CONNECT;
1635 rdma_destroy_id(id);
1639 static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
1640 struct ib_cm_event *ib_event,
1641 struct net_device *net_dev)
1643 struct rdma_id_private *id_priv;
1644 struct rdma_cm_id *id;
1645 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1648 id = rdma_create_id(listen_id->event_handler, listen_id->context,
1649 listen_id->ps, IB_QPT_UD);
1653 id_priv = container_of(id, struct rdma_id_private, id);
1654 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1655 (struct sockaddr *)&id->route.addr.dst_addr,
1656 listen_id, ib_event, ss_family,
1657 ib_event->param.sidr_req_rcvd.service_id))
1661 ret = rdma_copy_addr(&id->route.addr.dev_addr, net_dev, NULL);
1665 if (!cma_any_addr(cma_src_addr(id_priv))) {
1666 ret = cma_translate_addr(cma_src_addr(id_priv),
1667 &id->route.addr.dev_addr);
1673 id_priv->state = RDMA_CM_CONNECT;
1676 rdma_destroy_id(id);
1680 static void cma_set_req_event_data(struct rdma_cm_event *event,
1681 struct ib_cm_req_event_param *req_data,
1682 void *private_data, int offset)
1684 event->param.conn.private_data = private_data + offset;
1685 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
1686 event->param.conn.responder_resources = req_data->responder_resources;
1687 event->param.conn.initiator_depth = req_data->initiator_depth;
1688 event->param.conn.flow_control = req_data->flow_control;
1689 event->param.conn.retry_count = req_data->retry_count;
1690 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
1691 event->param.conn.srq = req_data->srq;
1692 event->param.conn.qp_num = req_data->remote_qpn;
1695 static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
1697 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
1698 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
1699 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
1700 (id->qp_type == IB_QPT_UD)) ||
1704 static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
1706 struct rdma_id_private *listen_id, *conn_id;
1707 struct rdma_cm_event event;
1708 struct net_device *net_dev;
1711 listen_id = cma_id_from_event(cm_id, ib_event, &net_dev);
1712 if (IS_ERR(listen_id))
1713 return PTR_ERR(listen_id);
1715 if (!cma_check_req_qp_type(&listen_id->id, ib_event)) {
1720 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN)) {
1721 ret = -ECONNABORTED;
1725 memset(&event, 0, sizeof event);
1726 offset = cma_user_data_offset(listen_id);
1727 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1728 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
1729 conn_id = cma_new_udp_id(&listen_id->id, ib_event, net_dev);
1730 event.param.ud.private_data = ib_event->private_data + offset;
1731 event.param.ud.private_data_len =
1732 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
1734 conn_id = cma_new_conn_id(&listen_id->id, ib_event, net_dev);
1735 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
1736 ib_event->private_data, offset);
1743 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1744 ret = cma_acquire_dev(conn_id, listen_id);
1748 conn_id->cm_id.ib = cm_id;
1749 cm_id->context = conn_id;
1750 cm_id->cm_handler = cma_ib_handler;
1753 * Protect against the user destroying conn_id from another thread
1754 * until we're done accessing it.
1756 atomic_inc(&conn_id->refcount);
1757 ret = conn_id->id.event_handler(&conn_id->id, &event);
1761 * Acquire mutex to prevent user executing rdma_destroy_id()
1762 * while we're accessing the cm_id.
1765 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
1766 (conn_id->id.qp_type != IB_QPT_UD))
1767 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1768 mutex_unlock(&lock);
1769 mutex_unlock(&conn_id->handler_mutex);
1770 mutex_unlock(&listen_id->handler_mutex);
1771 cma_deref_id(conn_id);
1777 cma_deref_id(conn_id);
1778 /* Destroy the CM ID by returning a non-zero value. */
1779 conn_id->cm_id.ib = NULL;
1781 cma_exch(conn_id, RDMA_CM_DESTROYING);
1782 mutex_unlock(&conn_id->handler_mutex);
1784 mutex_unlock(&listen_id->handler_mutex);
1786 rdma_destroy_id(&conn_id->id);
1795 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
1797 if (addr->sa_family == AF_IB)
1798 return ((struct sockaddr_ib *) addr)->sib_sid;
1800 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
1802 EXPORT_SYMBOL(rdma_get_service_id);
1804 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
1806 struct rdma_id_private *id_priv = iw_id->context;
1807 struct rdma_cm_event event;
1809 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1810 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1812 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
1815 memset(&event, 0, sizeof event);
1816 switch (iw_event->event) {
1817 case IW_CM_EVENT_CLOSE:
1818 event.event = RDMA_CM_EVENT_DISCONNECTED;
1820 case IW_CM_EVENT_CONNECT_REPLY:
1821 memcpy(cma_src_addr(id_priv), laddr,
1822 rdma_addr_size(laddr));
1823 memcpy(cma_dst_addr(id_priv), raddr,
1824 rdma_addr_size(raddr));
1825 switch (iw_event->status) {
1827 event.event = RDMA_CM_EVENT_ESTABLISHED;
1828 event.param.conn.initiator_depth = iw_event->ird;
1829 event.param.conn.responder_resources = iw_event->ord;
1833 event.event = RDMA_CM_EVENT_REJECTED;
1836 event.event = RDMA_CM_EVENT_UNREACHABLE;
1839 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
1843 case IW_CM_EVENT_ESTABLISHED:
1844 event.event = RDMA_CM_EVENT_ESTABLISHED;
1845 event.param.conn.initiator_depth = iw_event->ird;
1846 event.param.conn.responder_resources = iw_event->ord;
1852 event.status = iw_event->status;
1853 event.param.conn.private_data = iw_event->private_data;
1854 event.param.conn.private_data_len = iw_event->private_data_len;
1855 ret = id_priv->id.event_handler(&id_priv->id, &event);
1857 /* Destroy the CM ID by returning a non-zero value. */
1858 id_priv->cm_id.iw = NULL;
1859 cma_exch(id_priv, RDMA_CM_DESTROYING);
1860 mutex_unlock(&id_priv->handler_mutex);
1861 rdma_destroy_id(&id_priv->id);
1865 mutex_unlock(&id_priv->handler_mutex);
1869 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
1870 struct iw_cm_event *iw_event)
1872 struct rdma_cm_id *new_cm_id;
1873 struct rdma_id_private *listen_id, *conn_id;
1874 struct rdma_cm_event event;
1876 struct ib_device_attr attr;
1877 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
1878 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
1880 listen_id = cm_id->context;
1881 if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
1882 return -ECONNABORTED;
1884 /* Create a new RDMA id for the new IW CM ID */
1885 new_cm_id = rdma_create_id(listen_id->id.event_handler,
1886 listen_id->id.context,
1887 RDMA_PS_TCP, IB_QPT_RC);
1888 if (IS_ERR(new_cm_id)) {
1892 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
1893 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
1894 conn_id->state = RDMA_CM_CONNECT;
1896 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr, NULL);
1898 mutex_unlock(&conn_id->handler_mutex);
1899 rdma_destroy_id(new_cm_id);
1903 ret = cma_acquire_dev(conn_id, listen_id);
1905 mutex_unlock(&conn_id->handler_mutex);
1906 rdma_destroy_id(new_cm_id);
1910 conn_id->cm_id.iw = cm_id;
1911 cm_id->context = conn_id;
1912 cm_id->cm_handler = cma_iw_handler;
1914 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
1915 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
1917 ret = ib_query_device(conn_id->id.device, &attr);
1919 mutex_unlock(&conn_id->handler_mutex);
1920 rdma_destroy_id(new_cm_id);
1924 memset(&event, 0, sizeof event);
1925 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
1926 event.param.conn.private_data = iw_event->private_data;
1927 event.param.conn.private_data_len = iw_event->private_data_len;
1928 event.param.conn.initiator_depth = iw_event->ird;
1929 event.param.conn.responder_resources = iw_event->ord;
1932 * Protect against the user destroying conn_id from another thread
1933 * until we're done accessing it.
1935 atomic_inc(&conn_id->refcount);
1936 ret = conn_id->id.event_handler(&conn_id->id, &event);
1938 /* User wants to destroy the CM ID */
1939 conn_id->cm_id.iw = NULL;
1940 cma_exch(conn_id, RDMA_CM_DESTROYING);
1941 mutex_unlock(&conn_id->handler_mutex);
1942 cma_deref_id(conn_id);
1943 rdma_destroy_id(&conn_id->id);
1947 mutex_unlock(&conn_id->handler_mutex);
1948 cma_deref_id(conn_id);
1951 mutex_unlock(&listen_id->handler_mutex);
1955 static int cma_ib_listen(struct rdma_id_private *id_priv)
1957 struct sockaddr *addr;
1958 struct ib_cm_id *id;
1961 addr = cma_src_addr(id_priv);
1962 svc_id = rdma_get_service_id(&id_priv->id, addr);
1963 id = ib_cm_insert_listen(id_priv->id.device, cma_req_handler, svc_id);
1966 id_priv->cm_id.ib = id;
1971 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
1974 struct iw_cm_id *id;
1976 id = iw_create_cm_id(id_priv->id.device,
1977 iw_conn_req_handler,
1982 id->tos = id_priv->tos;
1983 id_priv->cm_id.iw = id;
1985 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
1986 rdma_addr_size(cma_src_addr(id_priv)));
1988 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
1991 iw_destroy_cm_id(id_priv->cm_id.iw);
1992 id_priv->cm_id.iw = NULL;
1998 static int cma_listen_handler(struct rdma_cm_id *id,
1999 struct rdma_cm_event *event)
2001 struct rdma_id_private *id_priv = id->context;
2003 id->context = id_priv->id.context;
2004 id->event_handler = id_priv->id.event_handler;
2005 return id_priv->id.event_handler(id, event);
2008 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2009 struct cma_device *cma_dev)
2011 struct rdma_id_private *dev_id_priv;
2012 struct rdma_cm_id *id;
2015 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2018 id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
2019 id_priv->id.qp_type);
2023 dev_id_priv = container_of(id, struct rdma_id_private, id);
2025 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2026 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2027 rdma_addr_size(cma_src_addr(id_priv)));
2029 cma_attach_to_dev(dev_id_priv, cma_dev);
2030 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2031 atomic_inc(&id_priv->refcount);
2032 dev_id_priv->internal_id = 1;
2033 dev_id_priv->afonly = id_priv->afonly;
2035 ret = rdma_listen(id, id_priv->backlog);
2037 printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
2038 "listening on device %s\n", ret, cma_dev->device->name);
2041 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2043 struct cma_device *cma_dev;
2046 list_add_tail(&id_priv->list, &listen_any_list);
2047 list_for_each_entry(cma_dev, &dev_list, list)
2048 cma_listen_on_dev(id_priv, cma_dev);
2049 mutex_unlock(&lock);
2052 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2054 struct rdma_id_private *id_priv;
2056 id_priv = container_of(id, struct rdma_id_private, id);
2057 id_priv->tos = (u8) tos;
2059 EXPORT_SYMBOL(rdma_set_service_type);
2061 static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
2064 struct cma_work *work = context;
2065 struct rdma_route *route;
2067 route = &work->id->id.route;
2070 route->num_paths = 1;
2071 *route->path_rec = *path_rec;
2073 work->old_state = RDMA_CM_ROUTE_QUERY;
2074 work->new_state = RDMA_CM_ADDR_RESOLVED;
2075 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2076 work->event.status = status;
2079 queue_work(cma_wq, &work->work);
2082 static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
2083 struct cma_work *work)
2085 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2086 struct ib_sa_path_rec path_rec;
2087 ib_sa_comp_mask comp_mask;
2088 struct sockaddr_in6 *sin6;
2089 struct sockaddr_ib *sib;
2091 memset(&path_rec, 0, sizeof path_rec);
2092 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2093 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2094 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2095 path_rec.numb_path = 1;
2096 path_rec.reversible = 1;
2097 path_rec.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
2099 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2100 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2101 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2103 switch (cma_family(id_priv)) {
2105 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2106 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2109 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2110 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2111 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2114 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2115 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2116 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2120 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2121 id_priv->id.port_num, &path_rec,
2122 comp_mask, timeout_ms,
2123 GFP_KERNEL, cma_query_handler,
2124 work, &id_priv->query);
2126 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2129 static void cma_work_handler(struct work_struct *_work)
2131 struct cma_work *work = container_of(_work, struct cma_work, work);
2132 struct rdma_id_private *id_priv = work->id;
2135 mutex_lock(&id_priv->handler_mutex);
2136 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2139 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2140 cma_exch(id_priv, RDMA_CM_DESTROYING);
2144 mutex_unlock(&id_priv->handler_mutex);
2145 cma_deref_id(id_priv);
2147 rdma_destroy_id(&id_priv->id);
2151 static void cma_ndev_work_handler(struct work_struct *_work)
2153 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2154 struct rdma_id_private *id_priv = work->id;
2157 mutex_lock(&id_priv->handler_mutex);
2158 if (id_priv->state == RDMA_CM_DESTROYING ||
2159 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2162 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2163 cma_exch(id_priv, RDMA_CM_DESTROYING);
2168 mutex_unlock(&id_priv->handler_mutex);
2169 cma_deref_id(id_priv);
2171 rdma_destroy_id(&id_priv->id);
2175 static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
2177 struct rdma_route *route = &id_priv->id.route;
2178 struct cma_work *work;
2181 work = kzalloc(sizeof *work, GFP_KERNEL);
2186 INIT_WORK(&work->work, cma_work_handler);
2187 work->old_state = RDMA_CM_ROUTE_QUERY;
2188 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2189 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2191 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2192 if (!route->path_rec) {
2197 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2203 kfree(route->path_rec);
2204 route->path_rec = NULL;
2210 int rdma_set_ib_paths(struct rdma_cm_id *id,
2211 struct ib_sa_path_rec *path_rec, int num_paths)
2213 struct rdma_id_private *id_priv;
2216 id_priv = container_of(id, struct rdma_id_private, id);
2217 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2218 RDMA_CM_ROUTE_RESOLVED))
2221 id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
2223 if (!id->route.path_rec) {
2228 id->route.num_paths = num_paths;
2231 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2234 EXPORT_SYMBOL(rdma_set_ib_paths);
2236 static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
2238 struct cma_work *work;
2240 work = kzalloc(sizeof *work, GFP_KERNEL);
2245 INIT_WORK(&work->work, cma_work_handler);
2246 work->old_state = RDMA_CM_ROUTE_QUERY;
2247 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2248 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2249 queue_work(cma_wq, &work->work);
2253 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2256 struct net_device *dev;
2258 prio = rt_tos2priority(tos);
2259 dev = ndev->priv_flags & IFF_802_1Q_VLAN ?
2260 vlan_dev_real_dev(ndev) : ndev;
2263 return netdev_get_prio_tc_map(dev, prio);
2265 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2266 if (ndev->priv_flags & IFF_802_1Q_VLAN)
2267 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2268 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2273 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2275 struct rdma_route *route = &id_priv->id.route;
2276 struct rdma_addr *addr = &route->addr;
2277 struct cma_work *work;
2279 struct net_device *ndev = NULL;
2282 work = kzalloc(sizeof *work, GFP_KERNEL);
2287 INIT_WORK(&work->work, cma_work_handler);
2289 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2290 if (!route->path_rec) {
2295 route->num_paths = 1;
2297 if (addr->dev_addr.bound_dev_if)
2298 ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
2304 route->path_rec->vlan_id = rdma_vlan_dev_vlan_id(ndev);
2305 memcpy(route->path_rec->dmac, addr->dev_addr.dst_dev_addr, ETH_ALEN);
2306 memcpy(route->path_rec->smac, ndev->dev_addr, ndev->addr_len);
2308 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2309 &route->path_rec->sgid);
2310 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2311 &route->path_rec->dgid);
2313 route->path_rec->hop_limit = 1;
2314 route->path_rec->reversible = 1;
2315 route->path_rec->pkey = cpu_to_be16(0xffff);
2316 route->path_rec->mtu_selector = IB_SA_EQ;
2317 route->path_rec->sl = iboe_tos_to_sl(ndev, id_priv->tos);
2318 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2319 route->path_rec->rate_selector = IB_SA_EQ;
2320 route->path_rec->rate = iboe_get_rate(ndev);
2322 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2323 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2324 if (!route->path_rec->mtu) {
2329 work->old_state = RDMA_CM_ROUTE_QUERY;
2330 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2331 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2332 work->event.status = 0;
2334 queue_work(cma_wq, &work->work);
2339 kfree(route->path_rec);
2340 route->path_rec = NULL;
2346 int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
2348 struct rdma_id_private *id_priv;
2351 id_priv = container_of(id, struct rdma_id_private, id);
2352 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2355 atomic_inc(&id_priv->refcount);
2356 if (rdma_cap_ib_sa(id->device, id->port_num))
2357 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2358 else if (rdma_protocol_roce(id->device, id->port_num))
2359 ret = cma_resolve_iboe_route(id_priv);
2360 else if (rdma_protocol_iwarp(id->device, id->port_num))
2361 ret = cma_resolve_iw_route(id_priv, timeout_ms);
2370 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2371 cma_deref_id(id_priv);
2374 EXPORT_SYMBOL(rdma_resolve_route);
2376 static void cma_set_loopback(struct sockaddr *addr)
2378 switch (addr->sa_family) {
2380 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2383 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2387 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2393 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2395 struct cma_device *cma_dev, *cur_dev;
2396 struct ib_port_attr port_attr;
2404 list_for_each_entry(cur_dev, &dev_list, list) {
2405 if (cma_family(id_priv) == AF_IB &&
2406 !rdma_cap_ib_cm(cur_dev->device, 1))
2412 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2413 if (!ib_query_port(cur_dev->device, p, &port_attr) &&
2414 port_attr.state == IB_PORT_ACTIVE) {
2429 ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
2433 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2437 id_priv->id.route.addr.dev_addr.dev_type =
2438 (rdma_protocol_ib(cma_dev->device, p)) ?
2439 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2441 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2442 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2443 id_priv->id.port_num = p;
2444 cma_attach_to_dev(id_priv, cma_dev);
2445 cma_set_loopback(cma_src_addr(id_priv));
2447 mutex_unlock(&lock);
2451 static void addr_handler(int status, struct sockaddr *src_addr,
2452 struct rdma_dev_addr *dev_addr, void *context)
2454 struct rdma_id_private *id_priv = context;
2455 struct rdma_cm_event event;
2457 memset(&event, 0, sizeof event);
2458 mutex_lock(&id_priv->handler_mutex);
2459 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2460 RDMA_CM_ADDR_RESOLVED))
2463 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2464 if (!status && !id_priv->cma_dev)
2465 status = cma_acquire_dev(id_priv, NULL);
2468 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2469 RDMA_CM_ADDR_BOUND))
2471 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2472 event.status = status;
2474 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2476 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2477 cma_exch(id_priv, RDMA_CM_DESTROYING);
2478 mutex_unlock(&id_priv->handler_mutex);
2479 cma_deref_id(id_priv);
2480 rdma_destroy_id(&id_priv->id);
2484 mutex_unlock(&id_priv->handler_mutex);
2485 cma_deref_id(id_priv);
2488 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
2490 struct cma_work *work;
2494 work = kzalloc(sizeof *work, GFP_KERNEL);
2498 if (!id_priv->cma_dev) {
2499 ret = cma_bind_loopback(id_priv);
2504 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2505 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
2508 INIT_WORK(&work->work, cma_work_handler);
2509 work->old_state = RDMA_CM_ADDR_QUERY;
2510 work->new_state = RDMA_CM_ADDR_RESOLVED;
2511 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2512 queue_work(cma_wq, &work->work);
2519 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
2521 struct cma_work *work;
2524 work = kzalloc(sizeof *work, GFP_KERNEL);
2528 if (!id_priv->cma_dev) {
2529 ret = cma_resolve_ib_dev(id_priv);
2534 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
2535 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
2538 INIT_WORK(&work->work, cma_work_handler);
2539 work->old_state = RDMA_CM_ADDR_QUERY;
2540 work->new_state = RDMA_CM_ADDR_RESOLVED;
2541 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2542 queue_work(cma_wq, &work->work);
2549 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2550 struct sockaddr *dst_addr)
2552 if (!src_addr || !src_addr->sa_family) {
2553 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
2554 src_addr->sa_family = dst_addr->sa_family;
2555 if (dst_addr->sa_family == AF_INET6) {
2556 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
2557 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
2558 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
2559 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
2560 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
2561 } else if (dst_addr->sa_family == AF_IB) {
2562 ((struct sockaddr_ib *) src_addr)->sib_pkey =
2563 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
2566 return rdma_bind_addr(id, src_addr);
2569 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2570 struct sockaddr *dst_addr, int timeout_ms)
2572 struct rdma_id_private *id_priv;
2575 id_priv = container_of(id, struct rdma_id_private, id);
2576 if (id_priv->state == RDMA_CM_IDLE) {
2577 ret = cma_bind_addr(id, src_addr, dst_addr);
2582 if (cma_family(id_priv) != dst_addr->sa_family)
2585 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
2588 atomic_inc(&id_priv->refcount);
2589 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
2590 if (cma_any_addr(dst_addr)) {
2591 ret = cma_resolve_loopback(id_priv);
2593 if (dst_addr->sa_family == AF_IB) {
2594 ret = cma_resolve_ib_addr(id_priv);
2596 ret = rdma_resolve_ip(&addr_client, cma_src_addr(id_priv),
2597 dst_addr, &id->route.addr.dev_addr,
2598 timeout_ms, addr_handler, id_priv);
2606 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
2607 cma_deref_id(id_priv);
2610 EXPORT_SYMBOL(rdma_resolve_addr);
2612 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
2614 struct rdma_id_private *id_priv;
2615 unsigned long flags;
2618 id_priv = container_of(id, struct rdma_id_private, id);
2619 spin_lock_irqsave(&id_priv->lock, flags);
2620 if (reuse || id_priv->state == RDMA_CM_IDLE) {
2621 id_priv->reuseaddr = reuse;
2626 spin_unlock_irqrestore(&id_priv->lock, flags);
2629 EXPORT_SYMBOL(rdma_set_reuseaddr);
2631 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
2633 struct rdma_id_private *id_priv;
2634 unsigned long flags;
2637 id_priv = container_of(id, struct rdma_id_private, id);
2638 spin_lock_irqsave(&id_priv->lock, flags);
2639 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
2640 id_priv->options |= (1 << CMA_OPTION_AFONLY);
2641 id_priv->afonly = afonly;
2646 spin_unlock_irqrestore(&id_priv->lock, flags);
2649 EXPORT_SYMBOL(rdma_set_afonly);
2651 static void cma_bind_port(struct rdma_bind_list *bind_list,
2652 struct rdma_id_private *id_priv)
2654 struct sockaddr *addr;
2655 struct sockaddr_ib *sib;
2659 addr = cma_src_addr(id_priv);
2660 port = htons(bind_list->port);
2662 switch (addr->sa_family) {
2664 ((struct sockaddr_in *) addr)->sin_port = port;
2667 ((struct sockaddr_in6 *) addr)->sin6_port = port;
2670 sib = (struct sockaddr_ib *) addr;
2671 sid = be64_to_cpu(sib->sib_sid);
2672 mask = be64_to_cpu(sib->sib_sid_mask);
2673 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
2674 sib->sib_sid_mask = cpu_to_be64(~0ULL);
2677 id_priv->bind_list = bind_list;
2678 hlist_add_head(&id_priv->node, &bind_list->owners);
2681 static int cma_alloc_port(enum rdma_port_space ps,
2682 struct rdma_id_private *id_priv, unsigned short snum)
2684 struct rdma_bind_list *bind_list;
2687 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
2691 ret = cma_ps_alloc(ps, bind_list, snum);
2696 bind_list->port = (unsigned short)ret;
2697 cma_bind_port(bind_list, id_priv);
2701 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
2704 static int cma_alloc_any_port(enum rdma_port_space ps,
2705 struct rdma_id_private *id_priv)
2707 static unsigned int last_used_port;
2708 int low, high, remaining;
2711 inet_get_local_port_range(&init_net, &low, &high);
2712 remaining = (high - low) + 1;
2713 rover = prandom_u32() % remaining + low;
2715 if (last_used_port != rover &&
2716 !cma_ps_find(ps, (unsigned short)rover)) {
2717 int ret = cma_alloc_port(ps, id_priv, rover);
2719 * Remember previously used port number in order to avoid
2720 * re-using same port immediately after it is closed.
2723 last_used_port = rover;
2724 if (ret != -EADDRNOTAVAIL)
2729 if ((rover < low) || (rover > high))
2733 return -EADDRNOTAVAIL;
2737 * Check that the requested port is available. This is called when trying to
2738 * bind to a specific port, or when trying to listen on a bound port. In
2739 * the latter case, the provided id_priv may already be on the bind_list, but
2740 * we still need to check that it's okay to start listening.
2742 static int cma_check_port(struct rdma_bind_list *bind_list,
2743 struct rdma_id_private *id_priv, uint8_t reuseaddr)
2745 struct rdma_id_private *cur_id;
2746 struct sockaddr *addr, *cur_addr;
2748 addr = cma_src_addr(id_priv);
2749 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
2750 if (id_priv == cur_id)
2753 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
2757 cur_addr = cma_src_addr(cur_id);
2758 if (id_priv->afonly && cur_id->afonly &&
2759 (addr->sa_family != cur_addr->sa_family))
2762 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
2763 return -EADDRNOTAVAIL;
2765 if (!cma_addr_cmp(addr, cur_addr))
2771 static int cma_use_port(enum rdma_port_space ps,
2772 struct rdma_id_private *id_priv)
2774 struct rdma_bind_list *bind_list;
2775 unsigned short snum;
2778 snum = ntohs(cma_port(cma_src_addr(id_priv)));
2779 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
2782 bind_list = cma_ps_find(ps, snum);
2784 ret = cma_alloc_port(ps, id_priv, snum);
2786 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
2788 cma_bind_port(bind_list, id_priv);
2793 static int cma_bind_listen(struct rdma_id_private *id_priv)
2795 struct rdma_bind_list *bind_list = id_priv->bind_list;
2799 if (bind_list->owners.first->next)
2800 ret = cma_check_port(bind_list, id_priv, 0);
2801 mutex_unlock(&lock);
2805 static enum rdma_port_space cma_select_inet_ps(
2806 struct rdma_id_private *id_priv)
2808 switch (id_priv->id.ps) {
2813 return id_priv->id.ps;
2820 static enum rdma_port_space cma_select_ib_ps(struct rdma_id_private *id_priv)
2822 enum rdma_port_space ps = 0;
2823 struct sockaddr_ib *sib;
2824 u64 sid_ps, mask, sid;
2826 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2827 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
2828 sid = be64_to_cpu(sib->sib_sid) & mask;
2830 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
2831 sid_ps = RDMA_IB_IP_PS_IB;
2833 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
2834 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
2835 sid_ps = RDMA_IB_IP_PS_TCP;
2837 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
2838 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
2839 sid_ps = RDMA_IB_IP_PS_UDP;
2844 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
2845 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
2846 be64_to_cpu(sib->sib_sid_mask));
2851 static int cma_get_port(struct rdma_id_private *id_priv)
2853 enum rdma_port_space ps;
2856 if (cma_family(id_priv) != AF_IB)
2857 ps = cma_select_inet_ps(id_priv);
2859 ps = cma_select_ib_ps(id_priv);
2861 return -EPROTONOSUPPORT;
2864 if (cma_any_port(cma_src_addr(id_priv)))
2865 ret = cma_alloc_any_port(ps, id_priv);
2867 ret = cma_use_port(ps, id_priv);
2868 mutex_unlock(&lock);
2873 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
2874 struct sockaddr *addr)
2876 #if IS_ENABLED(CONFIG_IPV6)
2877 struct sockaddr_in6 *sin6;
2879 if (addr->sa_family != AF_INET6)
2882 sin6 = (struct sockaddr_in6 *) addr;
2884 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
2887 if (!sin6->sin6_scope_id)
2890 dev_addr->bound_dev_if = sin6->sin6_scope_id;
2895 int rdma_listen(struct rdma_cm_id *id, int backlog)
2897 struct rdma_id_private *id_priv;
2900 id_priv = container_of(id, struct rdma_id_private, id);
2901 if (id_priv->state == RDMA_CM_IDLE) {
2902 id->route.addr.src_addr.ss_family = AF_INET;
2903 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
2908 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
2911 if (id_priv->reuseaddr) {
2912 ret = cma_bind_listen(id_priv);
2917 id_priv->backlog = backlog;
2919 if (rdma_cap_ib_cm(id->device, 1)) {
2920 ret = cma_ib_listen(id_priv);
2923 } else if (rdma_cap_iw_cm(id->device, 1)) {
2924 ret = cma_iw_listen(id_priv, backlog);
2932 cma_listen_on_all(id_priv);
2936 id_priv->backlog = 0;
2937 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
2940 EXPORT_SYMBOL(rdma_listen);
2942 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
2944 struct rdma_id_private *id_priv;
2947 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
2948 addr->sa_family != AF_IB)
2949 return -EAFNOSUPPORT;
2951 id_priv = container_of(id, struct rdma_id_private, id);
2952 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
2955 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
2959 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
2960 if (!cma_any_addr(addr)) {
2961 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
2965 ret = cma_acquire_dev(id_priv, NULL);
2970 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
2971 if (addr->sa_family == AF_INET)
2972 id_priv->afonly = 1;
2973 #if IS_ENABLED(CONFIG_IPV6)
2974 else if (addr->sa_family == AF_INET6)
2975 id_priv->afonly = init_net.ipv6.sysctl.bindv6only;
2978 ret = cma_get_port(id_priv);
2984 if (id_priv->cma_dev)
2985 cma_release_dev(id_priv);
2987 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
2990 EXPORT_SYMBOL(rdma_bind_addr);
2992 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
2994 struct cma_hdr *cma_hdr;
2997 cma_hdr->cma_version = CMA_VERSION;
2998 if (cma_family(id_priv) == AF_INET) {
2999 struct sockaddr_in *src4, *dst4;
3001 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3002 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3004 cma_set_ip_ver(cma_hdr, 4);
3005 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3006 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3007 cma_hdr->port = src4->sin_port;
3008 } else if (cma_family(id_priv) == AF_INET6) {
3009 struct sockaddr_in6 *src6, *dst6;
3011 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3012 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3014 cma_set_ip_ver(cma_hdr, 6);
3015 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3016 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3017 cma_hdr->port = src6->sin6_port;
3022 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3023 struct ib_cm_event *ib_event)
3025 struct rdma_id_private *id_priv = cm_id->context;
3026 struct rdma_cm_event event;
3027 struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
3030 if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
3033 memset(&event, 0, sizeof event);
3034 switch (ib_event->event) {
3035 case IB_CM_SIDR_REQ_ERROR:
3036 event.event = RDMA_CM_EVENT_UNREACHABLE;
3037 event.status = -ETIMEDOUT;
3039 case IB_CM_SIDR_REP_RECEIVED:
3040 event.param.ud.private_data = ib_event->private_data;
3041 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3042 if (rep->status != IB_SIDR_SUCCESS) {
3043 event.event = RDMA_CM_EVENT_UNREACHABLE;
3044 event.status = ib_event->param.sidr_rep_rcvd.status;
3047 ret = cma_set_qkey(id_priv, rep->qkey);
3049 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3053 ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
3054 id_priv->id.route.path_rec,
3055 &event.param.ud.ah_attr);
3056 event.param.ud.qp_num = rep->qpn;
3057 event.param.ud.qkey = rep->qkey;
3058 event.event = RDMA_CM_EVENT_ESTABLISHED;
3062 printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
3067 ret = id_priv->id.event_handler(&id_priv->id, &event);
3069 /* Destroy the CM ID by returning a non-zero value. */
3070 id_priv->cm_id.ib = NULL;
3071 cma_exch(id_priv, RDMA_CM_DESTROYING);
3072 mutex_unlock(&id_priv->handler_mutex);
3073 rdma_destroy_id(&id_priv->id);
3077 mutex_unlock(&id_priv->handler_mutex);
3081 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3082 struct rdma_conn_param *conn_param)
3084 struct ib_cm_sidr_req_param req;
3085 struct ib_cm_id *id;
3089 memset(&req, 0, sizeof req);
3090 offset = cma_user_data_offset(id_priv);
3091 req.private_data_len = offset + conn_param->private_data_len;
3092 if (req.private_data_len < conn_param->private_data_len)
3095 if (req.private_data_len) {
3096 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3100 private_data = NULL;
3103 if (conn_param->private_data && conn_param->private_data_len)
3104 memcpy(private_data + offset, conn_param->private_data,
3105 conn_param->private_data_len);
3108 ret = cma_format_hdr(private_data, id_priv);
3111 req.private_data = private_data;
3114 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3120 id_priv->cm_id.ib = id;
3122 req.path = id_priv->id.route.path_rec;
3123 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3124 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3125 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3127 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3129 ib_destroy_cm_id(id_priv->cm_id.ib);
3130 id_priv->cm_id.ib = NULL;
3133 kfree(private_data);
3137 static int cma_connect_ib(struct rdma_id_private *id_priv,
3138 struct rdma_conn_param *conn_param)
3140 struct ib_cm_req_param req;
3141 struct rdma_route *route;
3143 struct ib_cm_id *id;
3146 memset(&req, 0, sizeof req);
3147 offset = cma_user_data_offset(id_priv);
3148 req.private_data_len = offset + conn_param->private_data_len;
3149 if (req.private_data_len < conn_param->private_data_len)
3152 if (req.private_data_len) {
3153 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3157 private_data = NULL;
3160 if (conn_param->private_data && conn_param->private_data_len)
3161 memcpy(private_data + offset, conn_param->private_data,
3162 conn_param->private_data_len);
3164 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3169 id_priv->cm_id.ib = id;
3171 route = &id_priv->id.route;
3173 ret = cma_format_hdr(private_data, id_priv);
3176 req.private_data = private_data;
3179 req.primary_path = &route->path_rec[0];
3180 if (route->num_paths == 2)
3181 req.alternate_path = &route->path_rec[1];
3183 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3184 req.qp_num = id_priv->qp_num;
3185 req.qp_type = id_priv->id.qp_type;
3186 req.starting_psn = id_priv->seq_num;
3187 req.responder_resources = conn_param->responder_resources;
3188 req.initiator_depth = conn_param->initiator_depth;
3189 req.flow_control = conn_param->flow_control;
3190 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3191 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3192 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3193 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3194 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3195 req.srq = id_priv->srq ? 1 : 0;
3197 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3199 if (ret && !IS_ERR(id)) {
3200 ib_destroy_cm_id(id);
3201 id_priv->cm_id.ib = NULL;
3204 kfree(private_data);
3208 static int cma_connect_iw(struct rdma_id_private *id_priv,
3209 struct rdma_conn_param *conn_param)
3211 struct iw_cm_id *cm_id;
3213 struct iw_cm_conn_param iw_param;
3215 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3217 return PTR_ERR(cm_id);
3219 cm_id->tos = id_priv->tos;
3220 id_priv->cm_id.iw = cm_id;
3222 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3223 rdma_addr_size(cma_src_addr(id_priv)));
3224 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3225 rdma_addr_size(cma_dst_addr(id_priv)));
3227 ret = cma_modify_qp_rtr(id_priv, conn_param);
3232 iw_param.ord = conn_param->initiator_depth;
3233 iw_param.ird = conn_param->responder_resources;
3234 iw_param.private_data = conn_param->private_data;
3235 iw_param.private_data_len = conn_param->private_data_len;
3236 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3238 memset(&iw_param, 0, sizeof iw_param);
3239 iw_param.qpn = id_priv->qp_num;
3241 ret = iw_cm_connect(cm_id, &iw_param);
3244 iw_destroy_cm_id(cm_id);
3245 id_priv->cm_id.iw = NULL;
3250 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3252 struct rdma_id_private *id_priv;
3255 id_priv = container_of(id, struct rdma_id_private, id);
3256 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3260 id_priv->qp_num = conn_param->qp_num;
3261 id_priv->srq = conn_param->srq;
3264 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3265 if (id->qp_type == IB_QPT_UD)
3266 ret = cma_resolve_ib_udp(id_priv, conn_param);
3268 ret = cma_connect_ib(id_priv, conn_param);
3269 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3270 ret = cma_connect_iw(id_priv, conn_param);
3278 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3281 EXPORT_SYMBOL(rdma_connect);
3283 static int cma_accept_ib(struct rdma_id_private *id_priv,
3284 struct rdma_conn_param *conn_param)
3286 struct ib_cm_rep_param rep;
3289 ret = cma_modify_qp_rtr(id_priv, conn_param);
3293 ret = cma_modify_qp_rts(id_priv, conn_param);
3297 memset(&rep, 0, sizeof rep);
3298 rep.qp_num = id_priv->qp_num;
3299 rep.starting_psn = id_priv->seq_num;
3300 rep.private_data = conn_param->private_data;
3301 rep.private_data_len = conn_param->private_data_len;
3302 rep.responder_resources = conn_param->responder_resources;
3303 rep.initiator_depth = conn_param->initiator_depth;
3304 rep.failover_accepted = 0;
3305 rep.flow_control = conn_param->flow_control;
3306 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3307 rep.srq = id_priv->srq ? 1 : 0;
3309 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3314 static int cma_accept_iw(struct rdma_id_private *id_priv,
3315 struct rdma_conn_param *conn_param)
3317 struct iw_cm_conn_param iw_param;
3320 ret = cma_modify_qp_rtr(id_priv, conn_param);
3324 iw_param.ord = conn_param->initiator_depth;
3325 iw_param.ird = conn_param->responder_resources;
3326 iw_param.private_data = conn_param->private_data;
3327 iw_param.private_data_len = conn_param->private_data_len;
3328 if (id_priv->id.qp) {
3329 iw_param.qpn = id_priv->qp_num;
3331 iw_param.qpn = conn_param->qp_num;
3333 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3336 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3337 enum ib_cm_sidr_status status, u32 qkey,
3338 const void *private_data, int private_data_len)
3340 struct ib_cm_sidr_rep_param rep;
3343 memset(&rep, 0, sizeof rep);
3344 rep.status = status;
3345 if (status == IB_SIDR_SUCCESS) {
3346 ret = cma_set_qkey(id_priv, qkey);
3349 rep.qp_num = id_priv->qp_num;
3350 rep.qkey = id_priv->qkey;
3352 rep.private_data = private_data;
3353 rep.private_data_len = private_data_len;
3355 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3358 int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3360 struct rdma_id_private *id_priv;
3363 id_priv = container_of(id, struct rdma_id_private, id);
3365 id_priv->owner = task_pid_nr(current);
3367 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3370 if (!id->qp && conn_param) {
3371 id_priv->qp_num = conn_param->qp_num;
3372 id_priv->srq = conn_param->srq;
3375 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3376 if (id->qp_type == IB_QPT_UD) {
3378 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3380 conn_param->private_data,
3381 conn_param->private_data_len);
3383 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3387 ret = cma_accept_ib(id_priv, conn_param);
3389 ret = cma_rep_recv(id_priv);
3391 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3392 ret = cma_accept_iw(id_priv, conn_param);
3401 cma_modify_qp_err(id_priv);
3402 rdma_reject(id, NULL, 0);
3405 EXPORT_SYMBOL(rdma_accept);
3407 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3409 struct rdma_id_private *id_priv;
3412 id_priv = container_of(id, struct rdma_id_private, id);
3413 if (!id_priv->cm_id.ib)
3416 switch (id->device->node_type) {
3417 case RDMA_NODE_IB_CA:
3418 ret = ib_cm_notify(id_priv->cm_id.ib, event);
3426 EXPORT_SYMBOL(rdma_notify);
3428 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
3429 u8 private_data_len)
3431 struct rdma_id_private *id_priv;
3434 id_priv = container_of(id, struct rdma_id_private, id);
3435 if (!id_priv->cm_id.ib)
3438 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3439 if (id->qp_type == IB_QPT_UD)
3440 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
3441 private_data, private_data_len);
3443 ret = ib_send_cm_rej(id_priv->cm_id.ib,
3444 IB_CM_REJ_CONSUMER_DEFINED, NULL,
3445 0, private_data, private_data_len);
3446 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3447 ret = iw_cm_reject(id_priv->cm_id.iw,
3448 private_data, private_data_len);
3454 EXPORT_SYMBOL(rdma_reject);
3456 int rdma_disconnect(struct rdma_cm_id *id)
3458 struct rdma_id_private *id_priv;
3461 id_priv = container_of(id, struct rdma_id_private, id);
3462 if (!id_priv->cm_id.ib)
3465 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3466 ret = cma_modify_qp_err(id_priv);
3469 /* Initiate or respond to a disconnect. */
3470 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
3471 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
3472 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
3473 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
3480 EXPORT_SYMBOL(rdma_disconnect);
3482 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
3484 struct rdma_id_private *id_priv;
3485 struct cma_multicast *mc = multicast->context;
3486 struct rdma_cm_event event;
3489 id_priv = mc->id_priv;
3490 if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
3491 cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
3495 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
3496 mutex_lock(&id_priv->qp_mutex);
3497 if (!status && id_priv->id.qp)
3498 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
3499 be16_to_cpu(multicast->rec.mlid));
3500 mutex_unlock(&id_priv->qp_mutex);
3502 memset(&event, 0, sizeof event);
3503 event.status = status;
3504 event.param.ud.private_data = mc->context;
3506 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
3507 ib_init_ah_from_mcmember(id_priv->id.device,
3508 id_priv->id.port_num, &multicast->rec,
3509 &event.param.ud.ah_attr);
3510 event.param.ud.qp_num = 0xFFFFFF;
3511 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
3513 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
3515 ret = id_priv->id.event_handler(&id_priv->id, &event);
3517 cma_exch(id_priv, RDMA_CM_DESTROYING);
3518 mutex_unlock(&id_priv->handler_mutex);
3519 rdma_destroy_id(&id_priv->id);
3523 mutex_unlock(&id_priv->handler_mutex);
3527 static void cma_set_mgid(struct rdma_id_private *id_priv,
3528 struct sockaddr *addr, union ib_gid *mgid)
3530 unsigned char mc_map[MAX_ADDR_LEN];
3531 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3532 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
3533 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
3535 if (cma_any_addr(addr)) {
3536 memset(mgid, 0, sizeof *mgid);
3537 } else if ((addr->sa_family == AF_INET6) &&
3538 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
3540 /* IPv6 address is an SA assigned MGID. */
3541 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3542 } else if (addr->sa_family == AF_IB) {
3543 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
3544 } else if ((addr->sa_family == AF_INET6)) {
3545 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
3546 if (id_priv->id.ps == RDMA_PS_UDP)
3547 mc_map[7] = 0x01; /* Use RDMA CM signature */
3548 *mgid = *(union ib_gid *) (mc_map + 4);
3550 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
3551 if (id_priv->id.ps == RDMA_PS_UDP)
3552 mc_map[7] = 0x01; /* Use RDMA CM signature */
3553 *mgid = *(union ib_gid *) (mc_map + 4);
3557 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
3558 struct cma_multicast *mc)
3560 struct ib_sa_mcmember_rec rec;
3561 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3562 ib_sa_comp_mask comp_mask;
3565 ib_addr_get_mgid(dev_addr, &rec.mgid);
3566 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
3571 ret = cma_set_qkey(id_priv, 0);
3575 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
3576 rec.qkey = cpu_to_be32(id_priv->qkey);
3577 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
3578 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
3581 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
3582 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
3583 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
3584 IB_SA_MCMEMBER_REC_FLOW_LABEL |
3585 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
3587 if (id_priv->id.ps == RDMA_PS_IPOIB)
3588 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
3589 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
3590 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
3591 IB_SA_MCMEMBER_REC_MTU |
3592 IB_SA_MCMEMBER_REC_HOP_LIMIT;
3594 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
3595 id_priv->id.port_num, &rec,
3596 comp_mask, GFP_KERNEL,
3597 cma_ib_mc_handler, mc);
3598 return PTR_ERR_OR_ZERO(mc->multicast.ib);
3601 static void iboe_mcast_work_handler(struct work_struct *work)
3603 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
3604 struct cma_multicast *mc = mw->mc;
3605 struct ib_sa_multicast *m = mc->multicast.ib;
3607 mc->multicast.ib->context = mc;
3608 cma_ib_mc_handler(0, m);
3609 kref_put(&mc->mcref, release_mc);
3613 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
3615 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
3616 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
3618 if (cma_any_addr(addr)) {
3619 memset(mgid, 0, sizeof *mgid);
3620 } else if (addr->sa_family == AF_INET6) {
3621 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
3623 mgid->raw[0] = 0xff;
3624 mgid->raw[1] = 0x0e;
3633 mgid->raw[10] = 0xff;
3634 mgid->raw[11] = 0xff;
3635 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
3639 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
3640 struct cma_multicast *mc)
3642 struct iboe_mcast_work *work;
3643 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
3645 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
3646 struct net_device *ndev = NULL;
3648 if (cma_zero_addr((struct sockaddr *)&mc->addr))
3651 work = kzalloc(sizeof *work, GFP_KERNEL);
3655 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
3656 if (!mc->multicast.ib) {
3661 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
3663 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
3664 if (id_priv->id.ps == RDMA_PS_UDP)
3665 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3667 if (dev_addr->bound_dev_if)
3668 ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
3673 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
3674 mc->multicast.ib->rec.hop_limit = 1;
3675 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
3677 if (!mc->multicast.ib->rec.mtu) {
3681 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3682 &mc->multicast.ib->rec.port_gid);
3685 INIT_WORK(&work->work, iboe_mcast_work_handler);
3686 kref_get(&mc->mcref);
3687 queue_work(cma_wq, &work->work);
3692 kfree(mc->multicast.ib);
3698 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
3701 struct rdma_id_private *id_priv;
3702 struct cma_multicast *mc;
3705 id_priv = container_of(id, struct rdma_id_private, id);
3706 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
3707 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
3710 mc = kmalloc(sizeof *mc, GFP_KERNEL);
3714 memcpy(&mc->addr, addr, rdma_addr_size(addr));
3715 mc->context = context;
3716 mc->id_priv = id_priv;
3718 spin_lock(&id_priv->lock);
3719 list_add(&mc->list, &id_priv->mc_list);
3720 spin_unlock(&id_priv->lock);
3722 if (rdma_protocol_roce(id->device, id->port_num)) {
3723 kref_init(&mc->mcref);
3724 ret = cma_iboe_join_multicast(id_priv, mc);
3725 } else if (rdma_cap_ib_mcast(id->device, id->port_num))
3726 ret = cma_join_ib_multicast(id_priv, mc);
3731 spin_lock_irq(&id_priv->lock);
3732 list_del(&mc->list);
3733 spin_unlock_irq(&id_priv->lock);
3738 EXPORT_SYMBOL(rdma_join_multicast);
3740 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
3742 struct rdma_id_private *id_priv;
3743 struct cma_multicast *mc;
3745 id_priv = container_of(id, struct rdma_id_private, id);
3746 spin_lock_irq(&id_priv->lock);
3747 list_for_each_entry(mc, &id_priv->mc_list, list) {
3748 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
3749 list_del(&mc->list);
3750 spin_unlock_irq(&id_priv->lock);
3753 ib_detach_mcast(id->qp,
3754 &mc->multicast.ib->rec.mgid,
3755 be16_to_cpu(mc->multicast.ib->rec.mlid));
3757 BUG_ON(id_priv->cma_dev->device != id->device);
3759 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
3760 ib_sa_free_multicast(mc->multicast.ib);
3762 } else if (rdma_protocol_roce(id->device, id->port_num))
3763 kref_put(&mc->mcref, release_mc);
3768 spin_unlock_irq(&id_priv->lock);
3770 EXPORT_SYMBOL(rdma_leave_multicast);
3772 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
3774 struct rdma_dev_addr *dev_addr;
3775 struct cma_ndev_work *work;
3777 dev_addr = &id_priv->id.route.addr.dev_addr;
3779 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
3780 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
3781 printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
3782 ndev->name, &id_priv->id);
3783 work = kzalloc(sizeof *work, GFP_KERNEL);
3787 INIT_WORK(&work->work, cma_ndev_work_handler);
3789 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
3790 atomic_inc(&id_priv->refcount);
3791 queue_work(cma_wq, &work->work);
3797 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
3800 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
3801 struct cma_device *cma_dev;
3802 struct rdma_id_private *id_priv;
3803 int ret = NOTIFY_DONE;
3805 if (dev_net(ndev) != &init_net)
3808 if (event != NETDEV_BONDING_FAILOVER)
3811 if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
3815 list_for_each_entry(cma_dev, &dev_list, list)
3816 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3817 ret = cma_netdev_change(ndev, id_priv);
3823 mutex_unlock(&lock);
3827 static struct notifier_block cma_nb = {
3828 .notifier_call = cma_netdev_callback
3831 static void cma_add_one(struct ib_device *device)
3833 struct cma_device *cma_dev;
3834 struct rdma_id_private *id_priv;
3836 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
3840 cma_dev->device = device;
3842 init_completion(&cma_dev->comp);
3843 atomic_set(&cma_dev->refcount, 1);
3844 INIT_LIST_HEAD(&cma_dev->id_list);
3845 ib_set_client_data(device, &cma_client, cma_dev);
3848 list_add_tail(&cma_dev->list, &dev_list);
3849 list_for_each_entry(id_priv, &listen_any_list, list)
3850 cma_listen_on_dev(id_priv, cma_dev);
3851 mutex_unlock(&lock);
3854 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
3856 struct rdma_cm_event event;
3857 enum rdma_cm_state state;
3860 /* Record that we want to remove the device */
3861 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
3862 if (state == RDMA_CM_DESTROYING)
3865 cma_cancel_operation(id_priv, state);
3866 mutex_lock(&id_priv->handler_mutex);
3868 /* Check for destruction from another callback. */
3869 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
3872 memset(&event, 0, sizeof event);
3873 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
3874 ret = id_priv->id.event_handler(&id_priv->id, &event);
3876 mutex_unlock(&id_priv->handler_mutex);
3880 static void cma_process_remove(struct cma_device *cma_dev)
3882 struct rdma_id_private *id_priv;
3886 while (!list_empty(&cma_dev->id_list)) {
3887 id_priv = list_entry(cma_dev->id_list.next,
3888 struct rdma_id_private, list);
3890 list_del(&id_priv->listen_list);
3891 list_del_init(&id_priv->list);
3892 atomic_inc(&id_priv->refcount);
3893 mutex_unlock(&lock);
3895 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
3896 cma_deref_id(id_priv);
3898 rdma_destroy_id(&id_priv->id);
3902 mutex_unlock(&lock);
3904 cma_deref_dev(cma_dev);
3905 wait_for_completion(&cma_dev->comp);
3908 static void cma_remove_one(struct ib_device *device, void *client_data)
3910 struct cma_device *cma_dev = client_data;
3916 list_del(&cma_dev->list);
3917 mutex_unlock(&lock);
3919 cma_process_remove(cma_dev);
3923 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
3925 struct nlmsghdr *nlh;
3926 struct rdma_cm_id_stats *id_stats;
3927 struct rdma_id_private *id_priv;
3928 struct rdma_cm_id *id = NULL;
3929 struct cma_device *cma_dev;
3930 int i_dev = 0, i_id = 0;
3933 * We export all of the IDs as a sequence of messages. Each
3934 * ID gets its own netlink message.
3938 list_for_each_entry(cma_dev, &dev_list, list) {
3939 if (i_dev < cb->args[0]) {
3945 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
3946 if (i_id < cb->args[1]) {
3951 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
3952 sizeof *id_stats, RDMA_NL_RDMA_CM,
3953 RDMA_NL_RDMA_CM_ID_STATS,
3958 memset(id_stats, 0, sizeof *id_stats);
3960 id_stats->node_type = id->route.addr.dev_addr.dev_type;
3961 id_stats->port_num = id->port_num;
3962 id_stats->bound_dev_if =
3963 id->route.addr.dev_addr.bound_dev_if;
3965 if (ibnl_put_attr(skb, nlh,
3966 rdma_addr_size(cma_src_addr(id_priv)),
3967 cma_src_addr(id_priv),
3968 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
3970 if (ibnl_put_attr(skb, nlh,
3971 rdma_addr_size(cma_src_addr(id_priv)),
3972 cma_dst_addr(id_priv),
3973 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
3976 id_stats->pid = id_priv->owner;
3977 id_stats->port_space = id->ps;
3978 id_stats->cm_state = id_priv->state;
3979 id_stats->qp_num = id_priv->qp_num;
3980 id_stats->qp_type = id->qp_type;
3990 mutex_unlock(&lock);
3991 cb->args[0] = i_dev;
3997 static const struct ibnl_client_cbs cma_cb_table[] = {
3998 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats,
3999 .module = THIS_MODULE },
4002 static int __init cma_init(void)
4006 cma_wq = create_singlethread_workqueue("rdma_cm");
4010 ib_sa_register_client(&sa_client);
4011 rdma_addr_register_client(&addr_client);
4012 register_netdevice_notifier(&cma_nb);
4014 ret = ib_register_client(&cma_client);
4018 if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
4019 printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
4024 unregister_netdevice_notifier(&cma_nb);
4025 rdma_addr_unregister_client(&addr_client);
4026 ib_sa_unregister_client(&sa_client);
4027 destroy_workqueue(cma_wq);
4031 static void __exit cma_cleanup(void)
4033 ibnl_remove_client(RDMA_NL_RDMA_CM);
4034 ib_unregister_client(&cma_client);
4035 unregister_netdevice_notifier(&cma_nb);
4036 rdma_addr_unregister_client(&addr_client);
4037 ib_sa_unregister_client(&sa_client);
4038 destroy_workqueue(cma_wq);
4039 idr_destroy(&tcp_ps);
4040 idr_destroy(&udp_ps);
4041 idr_destroy(&ipoib_ps);
4042 idr_destroy(&ib_ps);
4045 module_init(cma_init);
4046 module_exit(cma_cleanup);