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/igmp.h>
42 #include <linux/idr.h>
43 #include <linux/inetdevice.h>
44 #include <linux/slab.h>
45 #include <linux/module.h>
46 #include <net/route.h>
48 #include <net/net_namespace.h>
49 #include <net/netns/generic.h>
52 #include <net/ip_fib.h>
53 #include <net/ip6_route.h>
55 #include <rdma/rdma_cm.h>
56 #include <rdma/rdma_cm_ib.h>
57 #include <rdma/rdma_netlink.h>
59 #include <rdma/ib_cache.h>
60 #include <rdma/ib_cm.h>
61 #include <rdma/ib_sa.h>
62 #include <rdma/iw_cm.h>
64 #include "core_priv.h"
67 MODULE_AUTHOR("Sean Hefty");
68 MODULE_DESCRIPTION("Generic RDMA CM Agent");
69 MODULE_LICENSE("Dual BSD/GPL");
71 #define CMA_CM_RESPONSE_TIMEOUT 20
72 #define CMA_QUERY_CLASSPORT_INFO_TIMEOUT 3000
73 #define CMA_MAX_CM_RETRIES 15
74 #define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
75 #define CMA_IBOE_PACKET_LIFETIME 18
76 #define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
78 static const char * const cma_events[] = {
79 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
80 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
81 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
82 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
83 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
84 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
85 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
86 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
87 [RDMA_CM_EVENT_REJECTED] = "rejected",
88 [RDMA_CM_EVENT_ESTABLISHED] = "established",
89 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
90 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
91 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
92 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
93 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
94 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
97 const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
101 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
102 cma_events[index] : "unrecognized event";
104 EXPORT_SYMBOL(rdma_event_msg);
106 const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
109 if (rdma_ib_or_roce(id->device, id->port_num))
110 return ibcm_reject_msg(reason);
112 if (rdma_protocol_iwarp(id->device, id->port_num))
113 return iwcm_reject_msg(reason);
116 return "unrecognized transport";
118 EXPORT_SYMBOL(rdma_reject_msg);
120 bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
122 if (rdma_ib_or_roce(id->device, id->port_num))
123 return reason == IB_CM_REJ_CONSUMER_DEFINED;
125 if (rdma_protocol_iwarp(id->device, id->port_num))
126 return reason == -ECONNREFUSED;
131 EXPORT_SYMBOL(rdma_is_consumer_reject);
133 const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
134 struct rdma_cm_event *ev, u8 *data_len)
138 if (rdma_is_consumer_reject(id, ev->status)) {
139 *data_len = ev->param.conn.private_data_len;
140 p = ev->param.conn.private_data;
147 EXPORT_SYMBOL(rdma_consumer_reject_data);
150 * rdma_iw_cm_id() - return the iw_cm_id pointer for this cm_id.
151 * @id: Communication Identifier
153 struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
155 struct rdma_id_private *id_priv;
157 id_priv = container_of(id, struct rdma_id_private, id);
158 if (id->device->node_type == RDMA_NODE_RNIC)
159 return id_priv->cm_id.iw;
162 EXPORT_SYMBOL(rdma_iw_cm_id);
165 * rdma_res_to_id() - return the rdma_cm_id pointer for this restrack.
166 * @res: rdma resource tracking entry pointer
168 struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
170 struct rdma_id_private *id_priv =
171 container_of(res, struct rdma_id_private, res);
175 EXPORT_SYMBOL(rdma_res_to_id);
177 static void cma_add_one(struct ib_device *device);
178 static void cma_remove_one(struct ib_device *device, void *client_data);
180 static struct ib_client cma_client = {
183 .remove = cma_remove_one
186 static struct ib_sa_client sa_client;
187 static LIST_HEAD(dev_list);
188 static LIST_HEAD(listen_any_list);
189 static DEFINE_MUTEX(lock);
190 static struct workqueue_struct *cma_wq;
191 static unsigned int cma_pernet_id;
200 static struct cma_pernet *cma_pernet(struct net *net)
202 return net_generic(net, cma_pernet_id);
205 static struct idr *cma_pernet_idr(struct net *net, enum rdma_ucm_port_space ps)
207 struct cma_pernet *pernet = cma_pernet(net);
211 return &pernet->tcp_ps;
213 return &pernet->udp_ps;
215 return &pernet->ipoib_ps;
217 return &pernet->ib_ps;
224 struct list_head list;
225 struct ib_device *device;
226 struct completion comp;
228 struct list_head id_list;
229 enum ib_gid_type *default_gid_type;
230 u8 *default_roce_tos;
233 struct rdma_bind_list {
234 enum rdma_ucm_port_space ps;
235 struct hlist_head owners;
239 struct class_port_info_context {
240 struct ib_class_port_info *class_port_info;
241 struct ib_device *device;
242 struct completion done;
243 struct ib_sa_query *sa_query;
247 static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
248 struct rdma_bind_list *bind_list, int snum)
250 struct idr *idr = cma_pernet_idr(net, ps);
252 return idr_alloc(idr, bind_list, snum, snum + 1, GFP_KERNEL);
255 static struct rdma_bind_list *cma_ps_find(struct net *net,
256 enum rdma_ucm_port_space ps, int snum)
258 struct idr *idr = cma_pernet_idr(net, ps);
260 return idr_find(idr, snum);
263 static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
266 struct idr *idr = cma_pernet_idr(net, ps);
268 idr_remove(idr, snum);
275 void cma_ref_dev(struct cma_device *cma_dev)
277 atomic_inc(&cma_dev->refcount);
280 struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
283 struct cma_device *cma_dev;
284 struct cma_device *found_cma_dev = NULL;
288 list_for_each_entry(cma_dev, &dev_list, list)
289 if (filter(cma_dev->device, cookie)) {
290 found_cma_dev = cma_dev;
295 cma_ref_dev(found_cma_dev);
297 return found_cma_dev;
300 int cma_get_default_gid_type(struct cma_device *cma_dev,
303 if (!rdma_is_port_valid(cma_dev->device, port))
306 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
309 int cma_set_default_gid_type(struct cma_device *cma_dev,
311 enum ib_gid_type default_gid_type)
313 unsigned long supported_gids;
315 if (!rdma_is_port_valid(cma_dev->device, port))
318 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
320 if (!(supported_gids & 1 << default_gid_type))
323 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
329 int cma_get_default_roce_tos(struct cma_device *cma_dev, unsigned int port)
331 if (!rdma_is_port_valid(cma_dev->device, port))
334 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
337 int cma_set_default_roce_tos(struct cma_device *cma_dev, unsigned int port,
340 if (!rdma_is_port_valid(cma_dev->device, port))
343 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
348 struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
350 return cma_dev->device;
354 * Device removal can occur at anytime, so we need extra handling to
355 * serialize notifying the user of device removal with other callbacks.
356 * We do this by disabling removal notification while a callback is in process,
357 * and reporting it after the callback completes.
360 struct cma_multicast {
361 struct rdma_id_private *id_priv;
363 struct ib_sa_multicast *ib;
365 struct list_head list;
367 struct sockaddr_storage addr;
373 struct work_struct work;
374 struct rdma_id_private *id;
375 enum rdma_cm_state old_state;
376 enum rdma_cm_state new_state;
377 struct rdma_cm_event event;
380 struct cma_ndev_work {
381 struct work_struct work;
382 struct rdma_id_private *id;
383 struct rdma_cm_event event;
386 struct iboe_mcast_work {
387 struct work_struct work;
388 struct rdma_id_private *id;
389 struct cma_multicast *mc;
402 u8 ip_version; /* IP version: 7:4 */
404 union cma_ip_addr src_addr;
405 union cma_ip_addr dst_addr;
408 #define CMA_VERSION 0x00
410 struct cma_req_info {
411 struct sockaddr_storage listen_addr_storage;
412 struct sockaddr_storage src_addr_storage;
413 struct ib_device *device;
414 union ib_gid local_gid;
421 static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
426 spin_lock_irqsave(&id_priv->lock, flags);
427 ret = (id_priv->state == comp);
428 spin_unlock_irqrestore(&id_priv->lock, flags);
432 static int cma_comp_exch(struct rdma_id_private *id_priv,
433 enum rdma_cm_state comp, enum rdma_cm_state exch)
438 spin_lock_irqsave(&id_priv->lock, flags);
439 if ((ret = (id_priv->state == comp)))
440 id_priv->state = exch;
441 spin_unlock_irqrestore(&id_priv->lock, flags);
445 static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
446 enum rdma_cm_state exch)
449 enum rdma_cm_state old;
451 spin_lock_irqsave(&id_priv->lock, flags);
452 old = id_priv->state;
453 id_priv->state = exch;
454 spin_unlock_irqrestore(&id_priv->lock, flags);
458 static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
460 return hdr->ip_version >> 4;
463 static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
465 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
468 static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
470 struct in_device *in_dev = NULL;
474 in_dev = __in_dev_get_rtnl(ndev);
477 ip_mc_inc_group(in_dev,
478 *(__be32 *)(mgid->raw + 12));
480 ip_mc_dec_group(in_dev,
481 *(__be32 *)(mgid->raw + 12));
485 return (in_dev) ? 0 : -ENODEV;
488 static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
489 struct cma_device *cma_dev)
491 cma_ref_dev(cma_dev);
492 id_priv->cma_dev = cma_dev;
493 id_priv->id.device = cma_dev->device;
494 id_priv->id.route.addr.dev_addr.transport =
495 rdma_node_get_transport(cma_dev->device->node_type);
496 list_add_tail(&id_priv->list, &cma_dev->id_list);
497 rdma_restrack_add(&id_priv->res);
500 static void cma_attach_to_dev(struct rdma_id_private *id_priv,
501 struct cma_device *cma_dev)
503 _cma_attach_to_dev(id_priv, cma_dev);
505 cma_dev->default_gid_type[id_priv->id.port_num -
506 rdma_start_port(cma_dev->device)];
509 void cma_deref_dev(struct cma_device *cma_dev)
511 if (atomic_dec_and_test(&cma_dev->refcount))
512 complete(&cma_dev->comp);
515 static inline void release_mc(struct kref *kref)
517 struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
519 kfree(mc->multicast.ib);
523 static void cma_release_dev(struct rdma_id_private *id_priv)
526 list_del(&id_priv->list);
527 cma_deref_dev(id_priv->cma_dev);
528 id_priv->cma_dev = NULL;
532 static inline struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
534 return (struct sockaddr *) &id_priv->id.route.addr.src_addr;
537 static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
539 return (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
542 static inline unsigned short cma_family(struct rdma_id_private *id_priv)
544 return id_priv->id.route.addr.src_addr.ss_family;
547 static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
549 struct ib_sa_mcmember_rec rec;
553 if (qkey && id_priv->qkey != qkey)
559 id_priv->qkey = qkey;
563 switch (id_priv->id.ps) {
566 id_priv->qkey = RDMA_UDP_QKEY;
569 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
570 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
571 id_priv->id.port_num, &rec.mgid,
574 id_priv->qkey = be32_to_cpu(rec.qkey);
582 static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
584 dev_addr->dev_type = ARPHRD_INFINIBAND;
585 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
586 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
589 static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
593 if (addr->sa_family != AF_IB) {
594 ret = rdma_translate_ip(addr, dev_addr);
596 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
603 static const struct ib_gid_attr *
604 cma_validate_port(struct ib_device *device, u8 port,
605 enum ib_gid_type gid_type,
607 struct rdma_id_private *id_priv)
609 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
610 int bound_if_index = dev_addr->bound_dev_if;
611 const struct ib_gid_attr *sgid_attr;
612 int dev_type = dev_addr->dev_type;
613 struct net_device *ndev = NULL;
615 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
616 return ERR_PTR(-ENODEV);
618 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
619 return ERR_PTR(-ENODEV);
621 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
622 ndev = dev_get_by_index(dev_addr->net, bound_if_index);
624 return ERR_PTR(-ENODEV);
626 gid_type = IB_GID_TYPE_IB;
629 sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
635 static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
636 const struct ib_gid_attr *sgid_attr)
638 WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
639 id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
643 * cma_acquire_dev_by_src_ip - Acquire cma device, port, gid attribute
644 * based on source ip address.
645 * @id_priv: cm_id which should be bound to cma device
647 * cma_acquire_dev_by_src_ip() binds cm id to cma device, port and GID attribute
648 * based on source IP address. It returns 0 on success or error code otherwise.
649 * It is applicable to active and passive side cm_id.
651 static int cma_acquire_dev_by_src_ip(struct rdma_id_private *id_priv)
653 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
654 const struct ib_gid_attr *sgid_attr;
655 union ib_gid gid, iboe_gid, *gidp;
656 struct cma_device *cma_dev;
657 enum ib_gid_type gid_type;
661 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
662 id_priv->id.ps == RDMA_PS_IPOIB)
665 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
668 memcpy(&gid, dev_addr->src_dev_addr +
669 rdma_addr_gid_offset(dev_addr), sizeof(gid));
672 list_for_each_entry(cma_dev, &dev_list, list) {
673 for (port = rdma_start_port(cma_dev->device);
674 port <= rdma_end_port(cma_dev->device); port++) {
675 gidp = rdma_protocol_roce(cma_dev->device, port) ?
677 gid_type = cma_dev->default_gid_type[port - 1];
678 sgid_attr = cma_validate_port(cma_dev->device, port,
679 gid_type, gidp, id_priv);
680 if (!IS_ERR(sgid_attr)) {
681 id_priv->id.port_num = port;
682 cma_bind_sgid_attr(id_priv, sgid_attr);
683 cma_attach_to_dev(id_priv, cma_dev);
695 * cma_ib_acquire_dev - Acquire cma device, port and SGID attribute
696 * @id_priv: cm id to bind to cma device
697 * @listen_id_priv: listener cm id to match against
698 * @req: Pointer to req structure containaining incoming
699 * request information
700 * cma_ib_acquire_dev() acquires cma device, port and SGID attribute when
701 * rdma device matches for listen_id and incoming request. It also verifies
702 * that a GID table entry is present for the source address.
703 * Returns 0 on success, or returns error code otherwise.
705 static int cma_ib_acquire_dev(struct rdma_id_private *id_priv,
706 const struct rdma_id_private *listen_id_priv,
707 struct cma_req_info *req)
709 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
710 const struct ib_gid_attr *sgid_attr;
711 enum ib_gid_type gid_type;
714 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
715 id_priv->id.ps == RDMA_PS_IPOIB)
718 if (rdma_protocol_roce(req->device, req->port))
719 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
722 memcpy(&gid, dev_addr->src_dev_addr +
723 rdma_addr_gid_offset(dev_addr), sizeof(gid));
725 gid_type = listen_id_priv->cma_dev->default_gid_type[req->port - 1];
726 sgid_attr = cma_validate_port(req->device, req->port,
727 gid_type, &gid, id_priv);
728 if (IS_ERR(sgid_attr))
729 return PTR_ERR(sgid_attr);
731 id_priv->id.port_num = req->port;
732 cma_bind_sgid_attr(id_priv, sgid_attr);
733 /* Need to acquire lock to protect against reader
734 * of cma_dev->id_list such as cma_netdev_callback() and
735 * cma_process_remove().
738 cma_attach_to_dev(id_priv, listen_id_priv->cma_dev);
743 static int cma_iw_acquire_dev(struct rdma_id_private *id_priv,
744 const struct rdma_id_private *listen_id_priv)
746 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
747 const struct ib_gid_attr *sgid_attr;
748 struct cma_device *cma_dev;
749 enum ib_gid_type gid_type;
754 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
755 id_priv->id.ps == RDMA_PS_IPOIB)
758 memcpy(&gid, dev_addr->src_dev_addr +
759 rdma_addr_gid_offset(dev_addr), sizeof(gid));
763 cma_dev = listen_id_priv->cma_dev;
764 port = listen_id_priv->id.port_num;
765 gid_type = listen_id_priv->gid_type;
766 sgid_attr = cma_validate_port(cma_dev->device, port,
767 gid_type, &gid, id_priv);
768 if (!IS_ERR(sgid_attr)) {
769 id_priv->id.port_num = port;
770 cma_bind_sgid_attr(id_priv, sgid_attr);
775 list_for_each_entry(cma_dev, &dev_list, list) {
776 for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
777 if (listen_id_priv->cma_dev == cma_dev &&
778 listen_id_priv->id.port_num == port)
781 gid_type = cma_dev->default_gid_type[port - 1];
782 sgid_attr = cma_validate_port(cma_dev->device, port,
783 gid_type, &gid, id_priv);
784 if (!IS_ERR(sgid_attr)) {
785 id_priv->id.port_num = port;
786 cma_bind_sgid_attr(id_priv, sgid_attr);
795 cma_attach_to_dev(id_priv, cma_dev);
802 * Select the source IB device and address to reach the destination IB address.
804 static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
806 struct cma_device *cma_dev, *cur_dev;
807 struct sockaddr_ib *addr;
808 union ib_gid gid, sgid, *dgid;
811 enum ib_port_state port_state;
815 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
816 dgid = (union ib_gid *) &addr->sib_addr;
817 pkey = ntohs(addr->sib_pkey);
820 list_for_each_entry(cur_dev, &dev_list, list) {
821 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
822 if (!rdma_cap_af_ib(cur_dev->device, p))
825 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
828 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
830 for (i = 0; !rdma_query_gid(cur_dev->device,
833 if (!memcmp(&gid, dgid, sizeof(gid))) {
836 id_priv->id.port_num = p;
840 if (!cma_dev && (gid.global.subnet_prefix ==
841 dgid->global.subnet_prefix) &&
842 port_state == IB_PORT_ACTIVE) {
845 id_priv->id.port_num = p;
855 cma_attach_to_dev(id_priv, cma_dev);
857 addr = (struct sockaddr_ib *)cma_src_addr(id_priv);
858 memcpy(&addr->sib_addr, &sgid, sizeof(sgid));
859 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
863 static void cma_deref_id(struct rdma_id_private *id_priv)
865 if (atomic_dec_and_test(&id_priv->refcount))
866 complete(&id_priv->comp);
869 struct rdma_cm_id *__rdma_create_id(struct net *net,
870 rdma_cm_event_handler event_handler,
871 void *context, enum rdma_ucm_port_space ps,
872 enum ib_qp_type qp_type, const char *caller)
874 struct rdma_id_private *id_priv;
876 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
878 return ERR_PTR(-ENOMEM);
880 rdma_restrack_set_task(&id_priv->res, caller);
881 id_priv->res.type = RDMA_RESTRACK_CM_ID;
882 id_priv->state = RDMA_CM_IDLE;
883 id_priv->id.context = context;
884 id_priv->id.event_handler = event_handler;
886 id_priv->id.qp_type = qp_type;
887 id_priv->tos_set = false;
888 id_priv->gid_type = IB_GID_TYPE_IB;
889 spin_lock_init(&id_priv->lock);
890 mutex_init(&id_priv->qp_mutex);
891 init_completion(&id_priv->comp);
892 atomic_set(&id_priv->refcount, 1);
893 mutex_init(&id_priv->handler_mutex);
894 INIT_LIST_HEAD(&id_priv->listen_list);
895 INIT_LIST_HEAD(&id_priv->mc_list);
896 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
897 id_priv->id.route.addr.dev_addr.net = get_net(net);
898 id_priv->seq_num &= 0x00ffffff;
902 EXPORT_SYMBOL(__rdma_create_id);
904 static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
906 struct ib_qp_attr qp_attr;
907 int qp_attr_mask, ret;
909 qp_attr.qp_state = IB_QPS_INIT;
910 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
914 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
918 qp_attr.qp_state = IB_QPS_RTR;
919 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
923 qp_attr.qp_state = IB_QPS_RTS;
925 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
930 static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
932 struct ib_qp_attr qp_attr;
933 int qp_attr_mask, ret;
935 qp_attr.qp_state = IB_QPS_INIT;
936 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
940 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
943 int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
944 struct ib_qp_init_attr *qp_init_attr)
946 struct rdma_id_private *id_priv;
950 id_priv = container_of(id, struct rdma_id_private, id);
951 if (id->device != pd->device)
954 qp_init_attr->port_num = id->port_num;
955 qp = ib_create_qp(pd, qp_init_attr);
959 if (id->qp_type == IB_QPT_UD)
960 ret = cma_init_ud_qp(id_priv, qp);
962 ret = cma_init_conn_qp(id_priv, qp);
967 id_priv->qp_num = qp->qp_num;
968 id_priv->srq = (qp->srq != NULL);
974 EXPORT_SYMBOL(rdma_create_qp);
976 void rdma_destroy_qp(struct rdma_cm_id *id)
978 struct rdma_id_private *id_priv;
980 id_priv = container_of(id, struct rdma_id_private, id);
981 mutex_lock(&id_priv->qp_mutex);
982 ib_destroy_qp(id_priv->id.qp);
983 id_priv->id.qp = NULL;
984 mutex_unlock(&id_priv->qp_mutex);
986 EXPORT_SYMBOL(rdma_destroy_qp);
988 static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
989 struct rdma_conn_param *conn_param)
991 struct ib_qp_attr qp_attr;
992 int qp_attr_mask, ret;
994 mutex_lock(&id_priv->qp_mutex);
995 if (!id_priv->id.qp) {
1000 /* Need to update QP attributes from default values. */
1001 qp_attr.qp_state = IB_QPS_INIT;
1002 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1006 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1010 qp_attr.qp_state = IB_QPS_RTR;
1011 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1015 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
1018 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
1019 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1021 mutex_unlock(&id_priv->qp_mutex);
1025 static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
1026 struct rdma_conn_param *conn_param)
1028 struct ib_qp_attr qp_attr;
1029 int qp_attr_mask, ret;
1031 mutex_lock(&id_priv->qp_mutex);
1032 if (!id_priv->id.qp) {
1037 qp_attr.qp_state = IB_QPS_RTS;
1038 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1043 qp_attr.max_rd_atomic = conn_param->initiator_depth;
1044 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1046 mutex_unlock(&id_priv->qp_mutex);
1050 static int cma_modify_qp_err(struct rdma_id_private *id_priv)
1052 struct ib_qp_attr qp_attr;
1055 mutex_lock(&id_priv->qp_mutex);
1056 if (!id_priv->id.qp) {
1061 qp_attr.qp_state = IB_QPS_ERR;
1062 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
1064 mutex_unlock(&id_priv->qp_mutex);
1068 static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
1069 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
1071 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1075 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
1078 pkey = ib_addr_get_pkey(dev_addr);
1080 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
1081 pkey, &qp_attr->pkey_index);
1085 qp_attr->port_num = id_priv->id.port_num;
1086 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
1088 if (id_priv->id.qp_type == IB_QPT_UD) {
1089 ret = cma_set_qkey(id_priv, 0);
1093 qp_attr->qkey = id_priv->qkey;
1094 *qp_attr_mask |= IB_QP_QKEY;
1096 qp_attr->qp_access_flags = 0;
1097 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1102 int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1105 struct rdma_id_private *id_priv;
1108 id_priv = container_of(id, struct rdma_id_private, id);
1109 if (rdma_cap_ib_cm(id->device, id->port_num)) {
1110 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
1111 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1113 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1116 if (qp_attr->qp_state == IB_QPS_RTR)
1117 qp_attr->rq_psn = id_priv->seq_num;
1118 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
1119 if (!id_priv->cm_id.iw) {
1120 qp_attr->qp_access_flags = 0;
1121 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1123 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1125 qp_attr->port_num = id_priv->id.port_num;
1126 *qp_attr_mask |= IB_QP_PORT;
1132 EXPORT_SYMBOL(rdma_init_qp_attr);
1134 static inline bool cma_zero_addr(const struct sockaddr *addr)
1136 switch (addr->sa_family) {
1138 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1140 return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
1142 return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
1148 static inline bool cma_loopback_addr(const struct sockaddr *addr)
1150 switch (addr->sa_family) {
1152 return ipv4_is_loopback(
1153 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
1155 return ipv6_addr_loopback(
1156 &((struct sockaddr_in6 *)addr)->sin6_addr);
1158 return ib_addr_loopback(
1159 &((struct sockaddr_ib *)addr)->sib_addr);
1165 static inline bool cma_any_addr(const struct sockaddr *addr)
1167 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1170 static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
1172 if (src->sa_family != dst->sa_family)
1175 switch (src->sa_family) {
1177 return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
1178 ((struct sockaddr_in *) dst)->sin_addr.s_addr;
1180 return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
1181 &((struct sockaddr_in6 *) dst)->sin6_addr);
1183 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1184 &((struct sockaddr_ib *) dst)->sib_addr);
1188 static __be16 cma_port(const struct sockaddr *addr)
1190 struct sockaddr_ib *sib;
1192 switch (addr->sa_family) {
1194 return ((struct sockaddr_in *) addr)->sin_port;
1196 return ((struct sockaddr_in6 *) addr)->sin6_port;
1198 sib = (struct sockaddr_ib *) addr;
1199 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1200 be64_to_cpu(sib->sib_sid_mask)));
1206 static inline int cma_any_port(const struct sockaddr *addr)
1208 return !cma_port(addr);
1211 static void cma_save_ib_info(struct sockaddr *src_addr,
1212 struct sockaddr *dst_addr,
1213 const struct rdma_cm_id *listen_id,
1214 const struct sa_path_rec *path)
1216 struct sockaddr_ib *listen_ib, *ib;
1218 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
1220 ib = (struct sockaddr_ib *)src_addr;
1221 ib->sib_family = AF_IB;
1223 ib->sib_pkey = path->pkey;
1224 ib->sib_flowinfo = path->flow_label;
1225 memcpy(&ib->sib_addr, &path->sgid, 16);
1226 ib->sib_sid = path->service_id;
1227 ib->sib_scope_id = 0;
1229 ib->sib_pkey = listen_ib->sib_pkey;
1230 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1231 ib->sib_addr = listen_ib->sib_addr;
1232 ib->sib_sid = listen_ib->sib_sid;
1233 ib->sib_scope_id = listen_ib->sib_scope_id;
1235 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
1238 ib = (struct sockaddr_ib *)dst_addr;
1239 ib->sib_family = AF_IB;
1241 ib->sib_pkey = path->pkey;
1242 ib->sib_flowinfo = path->flow_label;
1243 memcpy(&ib->sib_addr, &path->dgid, 16);
1248 static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1249 struct sockaddr_in *dst_addr,
1250 struct cma_hdr *hdr,
1254 *src_addr = (struct sockaddr_in) {
1255 .sin_family = AF_INET,
1256 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1257 .sin_port = local_port,
1262 *dst_addr = (struct sockaddr_in) {
1263 .sin_family = AF_INET,
1264 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1265 .sin_port = hdr->port,
1270 static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1271 struct sockaddr_in6 *dst_addr,
1272 struct cma_hdr *hdr,
1276 *src_addr = (struct sockaddr_in6) {
1277 .sin6_family = AF_INET6,
1278 .sin6_addr = hdr->dst_addr.ip6,
1279 .sin6_port = local_port,
1284 *dst_addr = (struct sockaddr_in6) {
1285 .sin6_family = AF_INET6,
1286 .sin6_addr = hdr->src_addr.ip6,
1287 .sin6_port = hdr->port,
1292 static u16 cma_port_from_service_id(__be64 service_id)
1294 return (u16)be64_to_cpu(service_id);
1297 static int cma_save_ip_info(struct sockaddr *src_addr,
1298 struct sockaddr *dst_addr,
1299 const struct ib_cm_event *ib_event,
1302 struct cma_hdr *hdr;
1305 hdr = ib_event->private_data;
1306 if (hdr->cma_version != CMA_VERSION)
1309 port = htons(cma_port_from_service_id(service_id));
1311 switch (cma_get_ip_ver(hdr)) {
1313 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1314 (struct sockaddr_in *)dst_addr, hdr, port);
1317 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1318 (struct sockaddr_in6 *)dst_addr, hdr, port);
1321 return -EAFNOSUPPORT;
1327 static int cma_save_net_info(struct sockaddr *src_addr,
1328 struct sockaddr *dst_addr,
1329 const struct rdma_cm_id *listen_id,
1330 const struct ib_cm_event *ib_event,
1331 sa_family_t sa_family, __be64 service_id)
1333 if (sa_family == AF_IB) {
1334 if (ib_event->event == IB_CM_REQ_RECEIVED)
1335 cma_save_ib_info(src_addr, dst_addr, listen_id,
1336 ib_event->param.req_rcvd.primary_path);
1337 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1338 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1342 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1345 static int cma_save_req_info(const struct ib_cm_event *ib_event,
1346 struct cma_req_info *req)
1348 const struct ib_cm_req_event_param *req_param =
1349 &ib_event->param.req_rcvd;
1350 const struct ib_cm_sidr_req_event_param *sidr_param =
1351 &ib_event->param.sidr_req_rcvd;
1353 switch (ib_event->event) {
1354 case IB_CM_REQ_RECEIVED:
1355 req->device = req_param->listen_id->device;
1356 req->port = req_param->port;
1357 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1358 sizeof(req->local_gid));
1359 req->has_gid = true;
1360 req->service_id = req_param->primary_path->service_id;
1361 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
1362 if (req->pkey != req_param->bth_pkey)
1363 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1364 "RDMA CMA: in the future this may cause the request to be dropped\n",
1365 req_param->bth_pkey, req->pkey);
1367 case IB_CM_SIDR_REQ_RECEIVED:
1368 req->device = sidr_param->listen_id->device;
1369 req->port = sidr_param->port;
1370 req->has_gid = false;
1371 req->service_id = sidr_param->service_id;
1372 req->pkey = sidr_param->pkey;
1373 if (req->pkey != sidr_param->bth_pkey)
1374 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1375 "RDMA CMA: in the future this may cause the request to be dropped\n",
1376 sidr_param->bth_pkey, req->pkey);
1385 static bool validate_ipv4_net_dev(struct net_device *net_dev,
1386 const struct sockaddr_in *dst_addr,
1387 const struct sockaddr_in *src_addr)
1389 __be32 daddr = dst_addr->sin_addr.s_addr,
1390 saddr = src_addr->sin_addr.s_addr;
1391 struct fib_result res;
1396 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1397 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1398 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1399 ipv4_is_loopback(saddr))
1402 memset(&fl4, 0, sizeof(fl4));
1403 fl4.flowi4_iif = net_dev->ifindex;
1408 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
1409 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
1415 static bool validate_ipv6_net_dev(struct net_device *net_dev,
1416 const struct sockaddr_in6 *dst_addr,
1417 const struct sockaddr_in6 *src_addr)
1419 #if IS_ENABLED(CONFIG_IPV6)
1420 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1421 IPV6_ADDR_LINKLOCAL;
1422 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1423 &src_addr->sin6_addr, net_dev->ifindex,
1430 ret = rt->rt6i_idev->dev == net_dev;
1439 static bool validate_net_dev(struct net_device *net_dev,
1440 const struct sockaddr *daddr,
1441 const struct sockaddr *saddr)
1443 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1444 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1445 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1446 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1448 switch (daddr->sa_family) {
1450 return saddr->sa_family == AF_INET &&
1451 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1454 return saddr->sa_family == AF_INET6 &&
1455 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1462 static struct net_device *
1463 roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
1465 const struct ib_gid_attr *sgid_attr = NULL;
1467 if (ib_event->event == IB_CM_REQ_RECEIVED)
1468 sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
1469 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1470 sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
1474 dev_hold(sgid_attr->ndev);
1475 return sgid_attr->ndev;
1478 static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
1479 struct cma_req_info *req)
1481 struct sockaddr *listen_addr =
1482 (struct sockaddr *)&req->listen_addr_storage;
1483 struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
1484 struct net_device *net_dev;
1485 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1488 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1491 return ERR_PTR(err);
1493 if (rdma_protocol_roce(req->device, req->port))
1494 net_dev = roce_get_net_dev_by_cm_event(ib_event);
1496 net_dev = ib_get_net_dev_by_params(req->device, req->port,
1500 return ERR_PTR(-ENODEV);
1505 static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
1507 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1510 static bool cma_match_private_data(struct rdma_id_private *id_priv,
1511 const struct cma_hdr *hdr)
1513 struct sockaddr *addr = cma_src_addr(id_priv);
1515 struct in6_addr ip6_addr;
1517 if (cma_any_addr(addr) && !id_priv->afonly)
1520 switch (addr->sa_family) {
1522 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1523 if (cma_get_ip_ver(hdr) != 4)
1525 if (!cma_any_addr(addr) &&
1526 hdr->dst_addr.ip4.addr != ip4_addr)
1530 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1531 if (cma_get_ip_ver(hdr) != 6)
1533 if (!cma_any_addr(addr) &&
1534 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1546 static bool cma_protocol_roce(const struct rdma_cm_id *id)
1548 struct ib_device *device = id->device;
1549 const int port_num = id->port_num ?: rdma_start_port(device);
1551 return rdma_protocol_roce(device, port_num);
1554 static bool cma_is_req_ipv6_ll(const struct cma_req_info *req)
1556 const struct sockaddr *daddr =
1557 (const struct sockaddr *)&req->listen_addr_storage;
1558 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1560 /* Returns true if the req is for IPv6 link local */
1561 return (daddr->sa_family == AF_INET6 &&
1562 (ipv6_addr_type(&daddr6->sin6_addr) & IPV6_ADDR_LINKLOCAL));
1565 static bool cma_match_net_dev(const struct rdma_cm_id *id,
1566 const struct net_device *net_dev,
1567 const struct cma_req_info *req)
1569 const struct rdma_addr *addr = &id->route.addr;
1572 /* This request is an AF_IB request */
1573 return (!id->port_num || id->port_num == req->port) &&
1574 (addr->src_addr.ss_family == AF_IB);
1577 * If the request is not for IPv6 link local, allow matching
1578 * request to any netdevice of the one or multiport rdma device.
1580 if (!cma_is_req_ipv6_ll(req))
1583 * Net namespaces must match, and if the listner is listening
1584 * on a specific netdevice than netdevice must match as well.
1586 if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1587 (!!addr->dev_addr.bound_dev_if ==
1588 (addr->dev_addr.bound_dev_if == net_dev->ifindex)))
1594 static struct rdma_id_private *cma_find_listener(
1595 const struct rdma_bind_list *bind_list,
1596 const struct ib_cm_id *cm_id,
1597 const struct ib_cm_event *ib_event,
1598 const struct cma_req_info *req,
1599 const struct net_device *net_dev)
1601 struct rdma_id_private *id_priv, *id_priv_dev;
1604 return ERR_PTR(-EINVAL);
1606 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1607 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1608 if (id_priv->id.device == cm_id->device &&
1609 cma_match_net_dev(&id_priv->id, net_dev, req))
1611 list_for_each_entry(id_priv_dev,
1612 &id_priv->listen_list,
1614 if (id_priv_dev->id.device == cm_id->device &&
1615 cma_match_net_dev(&id_priv_dev->id,
1622 return ERR_PTR(-EINVAL);
1625 static struct rdma_id_private *
1626 cma_ib_id_from_event(struct ib_cm_id *cm_id,
1627 const struct ib_cm_event *ib_event,
1628 struct cma_req_info *req,
1629 struct net_device **net_dev)
1631 struct rdma_bind_list *bind_list;
1632 struct rdma_id_private *id_priv;
1635 err = cma_save_req_info(ib_event, req);
1637 return ERR_PTR(err);
1639 *net_dev = cma_get_net_dev(ib_event, req);
1640 if (IS_ERR(*net_dev)) {
1641 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
1642 /* Assuming the protocol is AF_IB */
1645 return ERR_CAST(*net_dev);
1650 * Net namespace might be getting deleted while route lookup,
1651 * cm_id lookup is in progress. Therefore, perform netdevice
1652 * validation, cm_id lookup under rcu lock.
1653 * RCU lock along with netdevice state check, synchronizes with
1654 * netdevice migrating to different net namespace and also avoids
1655 * case where net namespace doesn't get deleted while lookup is in
1657 * If the device state is not IFF_UP, its properties such as ifindex
1658 * and nd_net cannot be trusted to remain valid without rcu lock.
1659 * net/core/dev.c change_net_namespace() ensures to synchronize with
1660 * ongoing operations on net device after device is closed using
1661 * synchronize_net().
1666 * If netdevice is down, it is likely that it is administratively
1667 * down or it might be migrating to different namespace.
1668 * In that case avoid further processing, as the net namespace
1669 * or ifindex may change.
1671 if (((*net_dev)->flags & IFF_UP) == 0) {
1672 id_priv = ERR_PTR(-EHOSTUNREACH);
1676 if (!validate_net_dev(*net_dev,
1677 (struct sockaddr *)&req->listen_addr_storage,
1678 (struct sockaddr *)&req->src_addr_storage)) {
1679 id_priv = ERR_PTR(-EHOSTUNREACH);
1684 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
1685 rdma_ps_from_service_id(req->service_id),
1686 cma_port_from_service_id(req->service_id));
1687 id_priv = cma_find_listener(bind_list, cm_id, ib_event, req, *net_dev);
1690 if (IS_ERR(id_priv) && *net_dev) {
1697 static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
1699 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
1702 static void cma_cancel_route(struct rdma_id_private *id_priv)
1704 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
1706 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
1710 static void cma_cancel_listens(struct rdma_id_private *id_priv)
1712 struct rdma_id_private *dev_id_priv;
1715 * Remove from listen_any_list to prevent added devices from spawning
1716 * additional listen requests.
1719 list_del(&id_priv->list);
1721 while (!list_empty(&id_priv->listen_list)) {
1722 dev_id_priv = list_entry(id_priv->listen_list.next,
1723 struct rdma_id_private, listen_list);
1724 /* sync with device removal to avoid duplicate destruction */
1725 list_del_init(&dev_id_priv->list);
1726 list_del(&dev_id_priv->listen_list);
1727 mutex_unlock(&lock);
1729 rdma_destroy_id(&dev_id_priv->id);
1732 mutex_unlock(&lock);
1735 static void cma_cancel_operation(struct rdma_id_private *id_priv,
1736 enum rdma_cm_state state)
1739 case RDMA_CM_ADDR_QUERY:
1740 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1742 case RDMA_CM_ROUTE_QUERY:
1743 cma_cancel_route(id_priv);
1745 case RDMA_CM_LISTEN:
1746 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
1747 cma_cancel_listens(id_priv);
1754 static void cma_release_port(struct rdma_id_private *id_priv)
1756 struct rdma_bind_list *bind_list = id_priv->bind_list;
1757 struct net *net = id_priv->id.route.addr.dev_addr.net;
1763 hlist_del(&id_priv->node);
1764 if (hlist_empty(&bind_list->owners)) {
1765 cma_ps_remove(net, bind_list->ps, bind_list->port);
1768 mutex_unlock(&lock);
1771 static void cma_leave_roce_mc_group(struct rdma_id_private *id_priv,
1772 struct cma_multicast *mc)
1774 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1775 struct net_device *ndev = NULL;
1777 if (dev_addr->bound_dev_if)
1778 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
1780 cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid, false);
1783 kref_put(&mc->mcref, release_mc);
1786 static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1788 struct cma_multicast *mc;
1790 while (!list_empty(&id_priv->mc_list)) {
1791 mc = container_of(id_priv->mc_list.next,
1792 struct cma_multicast, list);
1793 list_del(&mc->list);
1794 if (rdma_cap_ib_mcast(id_priv->cma_dev->device,
1795 id_priv->id.port_num)) {
1796 ib_sa_free_multicast(mc->multicast.ib);
1799 cma_leave_roce_mc_group(id_priv, mc);
1804 void rdma_destroy_id(struct rdma_cm_id *id)
1806 struct rdma_id_private *id_priv;
1807 enum rdma_cm_state state;
1809 id_priv = container_of(id, struct rdma_id_private, id);
1810 state = cma_exch(id_priv, RDMA_CM_DESTROYING);
1811 cma_cancel_operation(id_priv, state);
1814 * Wait for any active callback to finish. New callbacks will find
1815 * the id_priv state set to destroying and abort.
1817 mutex_lock(&id_priv->handler_mutex);
1818 mutex_unlock(&id_priv->handler_mutex);
1820 rdma_restrack_del(&id_priv->res);
1821 if (id_priv->cma_dev) {
1822 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
1823 if (id_priv->cm_id.ib)
1824 ib_destroy_cm_id(id_priv->cm_id.ib);
1825 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
1826 if (id_priv->cm_id.iw)
1827 iw_destroy_cm_id(id_priv->cm_id.iw);
1829 cma_leave_mc_groups(id_priv);
1830 cma_release_dev(id_priv);
1833 cma_release_port(id_priv);
1834 cma_deref_id(id_priv);
1835 wait_for_completion(&id_priv->comp);
1837 if (id_priv->internal_id)
1838 cma_deref_id(id_priv->id.context);
1840 kfree(id_priv->id.route.path_rec);
1842 if (id_priv->id.route.addr.dev_addr.sgid_attr)
1843 rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
1845 put_net(id_priv->id.route.addr.dev_addr.net);
1848 EXPORT_SYMBOL(rdma_destroy_id);
1850 static int cma_rep_recv(struct rdma_id_private *id_priv)
1854 ret = cma_modify_qp_rtr(id_priv, NULL);
1858 ret = cma_modify_qp_rts(id_priv, NULL);
1862 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
1868 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
1869 cma_modify_qp_err(id_priv);
1870 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
1875 static void cma_set_rep_event_data(struct rdma_cm_event *event,
1876 const struct ib_cm_rep_event_param *rep_data,
1879 event->param.conn.private_data = private_data;
1880 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
1881 event->param.conn.responder_resources = rep_data->responder_resources;
1882 event->param.conn.initiator_depth = rep_data->initiator_depth;
1883 event->param.conn.flow_control = rep_data->flow_control;
1884 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
1885 event->param.conn.srq = rep_data->srq;
1886 event->param.conn.qp_num = rep_data->remote_qpn;
1889 static int cma_ib_handler(struct ib_cm_id *cm_id,
1890 const struct ib_cm_event *ib_event)
1892 struct rdma_id_private *id_priv = cm_id->context;
1893 struct rdma_cm_event event = {};
1896 mutex_lock(&id_priv->handler_mutex);
1897 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
1898 id_priv->state != RDMA_CM_CONNECT) ||
1899 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
1900 id_priv->state != RDMA_CM_DISCONNECT))
1903 switch (ib_event->event) {
1904 case IB_CM_REQ_ERROR:
1905 case IB_CM_REP_ERROR:
1906 event.event = RDMA_CM_EVENT_UNREACHABLE;
1907 event.status = -ETIMEDOUT;
1909 case IB_CM_REP_RECEIVED:
1910 if (cma_comp(id_priv, RDMA_CM_CONNECT) &&
1911 (id_priv->id.qp_type != IB_QPT_UD))
1912 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
1913 if (id_priv->id.qp) {
1914 event.status = cma_rep_recv(id_priv);
1915 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
1916 RDMA_CM_EVENT_ESTABLISHED;
1918 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
1920 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
1921 ib_event->private_data);
1923 case IB_CM_RTU_RECEIVED:
1924 case IB_CM_USER_ESTABLISHED:
1925 event.event = RDMA_CM_EVENT_ESTABLISHED;
1927 case IB_CM_DREQ_ERROR:
1928 event.status = -ETIMEDOUT; /* fall through */
1929 case IB_CM_DREQ_RECEIVED:
1930 case IB_CM_DREP_RECEIVED:
1931 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
1932 RDMA_CM_DISCONNECT))
1934 event.event = RDMA_CM_EVENT_DISCONNECTED;
1936 case IB_CM_TIMEWAIT_EXIT:
1937 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
1939 case IB_CM_MRA_RECEIVED:
1942 case IB_CM_REJ_RECEIVED:
1943 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
1944 ib_event->param.rej_rcvd.reason));
1945 cma_modify_qp_err(id_priv);
1946 event.status = ib_event->param.rej_rcvd.reason;
1947 event.event = RDMA_CM_EVENT_REJECTED;
1948 event.param.conn.private_data = ib_event->private_data;
1949 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
1952 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
1957 ret = id_priv->id.event_handler(&id_priv->id, &event);
1959 /* Destroy the CM ID by returning a non-zero value. */
1960 id_priv->cm_id.ib = NULL;
1961 cma_exch(id_priv, RDMA_CM_DESTROYING);
1962 mutex_unlock(&id_priv->handler_mutex);
1963 rdma_destroy_id(&id_priv->id);
1967 mutex_unlock(&id_priv->handler_mutex);
1971 static struct rdma_id_private *
1972 cma_ib_new_conn_id(const struct rdma_cm_id *listen_id,
1973 const struct ib_cm_event *ib_event,
1974 struct net_device *net_dev)
1976 struct rdma_id_private *listen_id_priv;
1977 struct rdma_id_private *id_priv;
1978 struct rdma_cm_id *id;
1979 struct rdma_route *rt;
1980 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
1981 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
1982 const __be64 service_id =
1983 ib_event->param.req_rcvd.primary_path->service_id;
1986 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
1987 id = __rdma_create_id(listen_id->route.addr.dev_addr.net,
1988 listen_id->event_handler, listen_id->context,
1989 listen_id->ps, ib_event->param.req_rcvd.qp_type,
1990 listen_id_priv->res.kern_name);
1994 id_priv = container_of(id, struct rdma_id_private, id);
1995 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
1996 (struct sockaddr *)&id->route.addr.dst_addr,
1997 listen_id, ib_event, ss_family, service_id))
2001 rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
2002 rt->path_rec = kmalloc_array(rt->num_paths, sizeof(*rt->path_rec),
2007 rt->path_rec[0] = *path;
2008 if (rt->num_paths == 2)
2009 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
2012 rdma_copy_src_l2_addr(&rt->addr.dev_addr, net_dev);
2014 if (!cma_protocol_roce(listen_id) &&
2015 cma_any_addr(cma_src_addr(id_priv))) {
2016 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
2017 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
2018 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
2019 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
2020 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
2025 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
2027 id_priv->state = RDMA_CM_CONNECT;
2031 rdma_destroy_id(id);
2035 static struct rdma_id_private *
2036 cma_ib_new_udp_id(const struct rdma_cm_id *listen_id,
2037 const struct ib_cm_event *ib_event,
2038 struct net_device *net_dev)
2040 const struct rdma_id_private *listen_id_priv;
2041 struct rdma_id_private *id_priv;
2042 struct rdma_cm_id *id;
2043 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
2044 struct net *net = listen_id->route.addr.dev_addr.net;
2047 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
2048 id = __rdma_create_id(net, listen_id->event_handler, listen_id->context,
2049 listen_id->ps, IB_QPT_UD,
2050 listen_id_priv->res.kern_name);
2054 id_priv = container_of(id, struct rdma_id_private, id);
2055 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2056 (struct sockaddr *)&id->route.addr.dst_addr,
2057 listen_id, ib_event, ss_family,
2058 ib_event->param.sidr_req_rcvd.service_id))
2062 rdma_copy_src_l2_addr(&id->route.addr.dev_addr, net_dev);
2064 if (!cma_any_addr(cma_src_addr(id_priv))) {
2065 ret = cma_translate_addr(cma_src_addr(id_priv),
2066 &id->route.addr.dev_addr);
2072 id_priv->state = RDMA_CM_CONNECT;
2075 rdma_destroy_id(id);
2079 static void cma_set_req_event_data(struct rdma_cm_event *event,
2080 const struct ib_cm_req_event_param *req_data,
2081 void *private_data, int offset)
2083 event->param.conn.private_data = private_data + offset;
2084 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
2085 event->param.conn.responder_resources = req_data->responder_resources;
2086 event->param.conn.initiator_depth = req_data->initiator_depth;
2087 event->param.conn.flow_control = req_data->flow_control;
2088 event->param.conn.retry_count = req_data->retry_count;
2089 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
2090 event->param.conn.srq = req_data->srq;
2091 event->param.conn.qp_num = req_data->remote_qpn;
2094 static int cma_ib_check_req_qp_type(const struct rdma_cm_id *id,
2095 const struct ib_cm_event *ib_event)
2097 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
2098 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
2099 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
2100 (id->qp_type == IB_QPT_UD)) ||
2104 static int cma_ib_req_handler(struct ib_cm_id *cm_id,
2105 const struct ib_cm_event *ib_event)
2107 struct rdma_id_private *listen_id, *conn_id = NULL;
2108 struct rdma_cm_event event = {};
2109 struct cma_req_info req = {};
2110 struct net_device *net_dev;
2114 listen_id = cma_ib_id_from_event(cm_id, ib_event, &req, &net_dev);
2115 if (IS_ERR(listen_id))
2116 return PTR_ERR(listen_id);
2118 if (!cma_ib_check_req_qp_type(&listen_id->id, ib_event)) {
2123 mutex_lock(&listen_id->handler_mutex);
2124 if (listen_id->state != RDMA_CM_LISTEN) {
2125 ret = -ECONNABORTED;
2129 offset = cma_user_data_offset(listen_id);
2130 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2131 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
2132 conn_id = cma_ib_new_udp_id(&listen_id->id, ib_event, net_dev);
2133 event.param.ud.private_data = ib_event->private_data + offset;
2134 event.param.ud.private_data_len =
2135 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
2137 conn_id = cma_ib_new_conn_id(&listen_id->id, ib_event, net_dev);
2138 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
2139 ib_event->private_data, offset);
2146 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2147 ret = cma_ib_acquire_dev(conn_id, listen_id, &req);
2151 conn_id->cm_id.ib = cm_id;
2152 cm_id->context = conn_id;
2153 cm_id->cm_handler = cma_ib_handler;
2156 * Protect against the user destroying conn_id from another thread
2157 * until we're done accessing it.
2159 atomic_inc(&conn_id->refcount);
2160 ret = conn_id->id.event_handler(&conn_id->id, &event);
2164 * Acquire mutex to prevent user executing rdma_destroy_id()
2165 * while we're accessing the cm_id.
2168 if (cma_comp(conn_id, RDMA_CM_CONNECT) &&
2169 (conn_id->id.qp_type != IB_QPT_UD))
2170 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
2171 mutex_unlock(&lock);
2172 mutex_unlock(&conn_id->handler_mutex);
2173 mutex_unlock(&listen_id->handler_mutex);
2174 cma_deref_id(conn_id);
2180 cma_deref_id(conn_id);
2181 /* Destroy the CM ID by returning a non-zero value. */
2182 conn_id->cm_id.ib = NULL;
2184 cma_exch(conn_id, RDMA_CM_DESTROYING);
2185 mutex_unlock(&conn_id->handler_mutex);
2187 mutex_unlock(&listen_id->handler_mutex);
2189 rdma_destroy_id(&conn_id->id);
2198 __be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
2200 if (addr->sa_family == AF_IB)
2201 return ((struct sockaddr_ib *) addr)->sib_sid;
2203 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
2205 EXPORT_SYMBOL(rdma_get_service_id);
2207 void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
2210 struct rdma_addr *addr = &cm_id->route.addr;
2212 if (!cm_id->device) {
2214 memset(sgid, 0, sizeof(*sgid));
2216 memset(dgid, 0, sizeof(*dgid));
2220 if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
2222 rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
2224 rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
2227 rdma_addr_get_sgid(&addr->dev_addr, sgid);
2229 rdma_addr_get_dgid(&addr->dev_addr, dgid);
2232 EXPORT_SYMBOL(rdma_read_gids);
2234 static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2236 struct rdma_id_private *id_priv = iw_id->context;
2237 struct rdma_cm_event event = {};
2239 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2240 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2242 mutex_lock(&id_priv->handler_mutex);
2243 if (id_priv->state != RDMA_CM_CONNECT)
2246 switch (iw_event->event) {
2247 case IW_CM_EVENT_CLOSE:
2248 event.event = RDMA_CM_EVENT_DISCONNECTED;
2250 case IW_CM_EVENT_CONNECT_REPLY:
2251 memcpy(cma_src_addr(id_priv), laddr,
2252 rdma_addr_size(laddr));
2253 memcpy(cma_dst_addr(id_priv), raddr,
2254 rdma_addr_size(raddr));
2255 switch (iw_event->status) {
2257 event.event = RDMA_CM_EVENT_ESTABLISHED;
2258 event.param.conn.initiator_depth = iw_event->ird;
2259 event.param.conn.responder_resources = iw_event->ord;
2263 event.event = RDMA_CM_EVENT_REJECTED;
2266 event.event = RDMA_CM_EVENT_UNREACHABLE;
2269 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2273 case IW_CM_EVENT_ESTABLISHED:
2274 event.event = RDMA_CM_EVENT_ESTABLISHED;
2275 event.param.conn.initiator_depth = iw_event->ird;
2276 event.param.conn.responder_resources = iw_event->ord;
2282 event.status = iw_event->status;
2283 event.param.conn.private_data = iw_event->private_data;
2284 event.param.conn.private_data_len = iw_event->private_data_len;
2285 ret = id_priv->id.event_handler(&id_priv->id, &event);
2287 /* Destroy the CM ID by returning a non-zero value. */
2288 id_priv->cm_id.iw = NULL;
2289 cma_exch(id_priv, RDMA_CM_DESTROYING);
2290 mutex_unlock(&id_priv->handler_mutex);
2291 rdma_destroy_id(&id_priv->id);
2296 mutex_unlock(&id_priv->handler_mutex);
2300 static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2301 struct iw_cm_event *iw_event)
2303 struct rdma_cm_id *new_cm_id;
2304 struct rdma_id_private *listen_id, *conn_id;
2305 struct rdma_cm_event event = {};
2306 int ret = -ECONNABORTED;
2307 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2308 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
2310 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2311 event.param.conn.private_data = iw_event->private_data;
2312 event.param.conn.private_data_len = iw_event->private_data_len;
2313 event.param.conn.initiator_depth = iw_event->ird;
2314 event.param.conn.responder_resources = iw_event->ord;
2316 listen_id = cm_id->context;
2318 mutex_lock(&listen_id->handler_mutex);
2319 if (listen_id->state != RDMA_CM_LISTEN)
2322 /* Create a new RDMA id for the new IW CM ID */
2323 new_cm_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2324 listen_id->id.event_handler,
2325 listen_id->id.context,
2326 RDMA_PS_TCP, IB_QPT_RC,
2327 listen_id->res.kern_name);
2328 if (IS_ERR(new_cm_id)) {
2332 conn_id = container_of(new_cm_id, struct rdma_id_private, id);
2333 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
2334 conn_id->state = RDMA_CM_CONNECT;
2336 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
2338 mutex_unlock(&conn_id->handler_mutex);
2339 rdma_destroy_id(new_cm_id);
2343 ret = cma_iw_acquire_dev(conn_id, listen_id);
2345 mutex_unlock(&conn_id->handler_mutex);
2346 rdma_destroy_id(new_cm_id);
2350 conn_id->cm_id.iw = cm_id;
2351 cm_id->context = conn_id;
2352 cm_id->cm_handler = cma_iw_handler;
2354 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2355 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
2358 * Protect against the user destroying conn_id from another thread
2359 * until we're done accessing it.
2361 atomic_inc(&conn_id->refcount);
2362 ret = conn_id->id.event_handler(&conn_id->id, &event);
2364 /* User wants to destroy the CM ID */
2365 conn_id->cm_id.iw = NULL;
2366 cma_exch(conn_id, RDMA_CM_DESTROYING);
2367 mutex_unlock(&conn_id->handler_mutex);
2368 cma_deref_id(conn_id);
2369 rdma_destroy_id(&conn_id->id);
2373 mutex_unlock(&conn_id->handler_mutex);
2374 cma_deref_id(conn_id);
2377 mutex_unlock(&listen_id->handler_mutex);
2381 static int cma_ib_listen(struct rdma_id_private *id_priv)
2383 struct sockaddr *addr;
2384 struct ib_cm_id *id;
2387 addr = cma_src_addr(id_priv);
2388 svc_id = rdma_get_service_id(&id_priv->id, addr);
2389 id = ib_cm_insert_listen(id_priv->id.device,
2390 cma_ib_req_handler, svc_id);
2393 id_priv->cm_id.ib = id;
2398 static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2401 struct iw_cm_id *id;
2403 id = iw_create_cm_id(id_priv->id.device,
2404 iw_conn_req_handler,
2409 id->tos = id_priv->tos;
2410 id_priv->cm_id.iw = id;
2412 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2413 rdma_addr_size(cma_src_addr(id_priv)));
2415 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2418 iw_destroy_cm_id(id_priv->cm_id.iw);
2419 id_priv->cm_id.iw = NULL;
2425 static int cma_listen_handler(struct rdma_cm_id *id,
2426 struct rdma_cm_event *event)
2428 struct rdma_id_private *id_priv = id->context;
2430 id->context = id_priv->id.context;
2431 id->event_handler = id_priv->id.event_handler;
2432 return id_priv->id.event_handler(id, event);
2435 static void cma_listen_on_dev(struct rdma_id_private *id_priv,
2436 struct cma_device *cma_dev)
2438 struct rdma_id_private *dev_id_priv;
2439 struct rdma_cm_id *id;
2440 struct net *net = id_priv->id.route.addr.dev_addr.net;
2443 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
2446 id = __rdma_create_id(net, cma_listen_handler, id_priv, id_priv->id.ps,
2447 id_priv->id.qp_type, id_priv->res.kern_name);
2451 dev_id_priv = container_of(id, struct rdma_id_private, id);
2453 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
2454 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2455 rdma_addr_size(cma_src_addr(id_priv)));
2457 _cma_attach_to_dev(dev_id_priv, cma_dev);
2458 list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
2459 atomic_inc(&id_priv->refcount);
2460 dev_id_priv->internal_id = 1;
2461 dev_id_priv->afonly = id_priv->afonly;
2463 ret = rdma_listen(id, id_priv->backlog);
2465 dev_warn(&cma_dev->device->dev,
2466 "RDMA CMA: cma_listen_on_dev, error %d\n", ret);
2469 static void cma_listen_on_all(struct rdma_id_private *id_priv)
2471 struct cma_device *cma_dev;
2474 list_add_tail(&id_priv->list, &listen_any_list);
2475 list_for_each_entry(cma_dev, &dev_list, list)
2476 cma_listen_on_dev(id_priv, cma_dev);
2477 mutex_unlock(&lock);
2480 void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2482 struct rdma_id_private *id_priv;
2484 id_priv = container_of(id, struct rdma_id_private, id);
2485 id_priv->tos = (u8) tos;
2486 id_priv->tos_set = true;
2488 EXPORT_SYMBOL(rdma_set_service_type);
2490 static void cma_query_handler(int status, struct sa_path_rec *path_rec,
2493 struct cma_work *work = context;
2494 struct rdma_route *route;
2496 route = &work->id->id.route;
2499 route->num_paths = 1;
2500 *route->path_rec = *path_rec;
2502 work->old_state = RDMA_CM_ROUTE_QUERY;
2503 work->new_state = RDMA_CM_ADDR_RESOLVED;
2504 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2505 work->event.status = status;
2506 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2510 queue_work(cma_wq, &work->work);
2513 static int cma_query_ib_route(struct rdma_id_private *id_priv,
2514 unsigned long timeout_ms, struct cma_work *work)
2516 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
2517 struct sa_path_rec path_rec;
2518 ib_sa_comp_mask comp_mask;
2519 struct sockaddr_in6 *sin6;
2520 struct sockaddr_ib *sib;
2522 memset(&path_rec, 0, sizeof path_rec);
2524 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2525 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2527 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
2528 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2529 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2530 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
2531 path_rec.numb_path = 1;
2532 path_rec.reversible = 1;
2533 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2534 cma_dst_addr(id_priv));
2536 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2537 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2538 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2540 switch (cma_family(id_priv)) {
2542 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2543 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
2546 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
2547 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2548 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2551 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2552 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2553 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2557 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
2558 id_priv->id.port_num, &path_rec,
2559 comp_mask, timeout_ms,
2560 GFP_KERNEL, cma_query_handler,
2561 work, &id_priv->query);
2563 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2566 static void cma_work_handler(struct work_struct *_work)
2568 struct cma_work *work = container_of(_work, struct cma_work, work);
2569 struct rdma_id_private *id_priv = work->id;
2572 mutex_lock(&id_priv->handler_mutex);
2573 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2576 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2577 cma_exch(id_priv, RDMA_CM_DESTROYING);
2581 mutex_unlock(&id_priv->handler_mutex);
2582 cma_deref_id(id_priv);
2584 rdma_destroy_id(&id_priv->id);
2588 static void cma_ndev_work_handler(struct work_struct *_work)
2590 struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
2591 struct rdma_id_private *id_priv = work->id;
2594 mutex_lock(&id_priv->handler_mutex);
2595 if (id_priv->state == RDMA_CM_DESTROYING ||
2596 id_priv->state == RDMA_CM_DEVICE_REMOVAL)
2599 if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
2600 cma_exch(id_priv, RDMA_CM_DESTROYING);
2605 mutex_unlock(&id_priv->handler_mutex);
2606 cma_deref_id(id_priv);
2608 rdma_destroy_id(&id_priv->id);
2612 static void cma_init_resolve_route_work(struct cma_work *work,
2613 struct rdma_id_private *id_priv)
2616 INIT_WORK(&work->work, cma_work_handler);
2617 work->old_state = RDMA_CM_ROUTE_QUERY;
2618 work->new_state = RDMA_CM_ROUTE_RESOLVED;
2619 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
2622 static void cma_init_resolve_addr_work(struct cma_work *work,
2623 struct rdma_id_private *id_priv)
2626 INIT_WORK(&work->work, cma_work_handler);
2627 work->old_state = RDMA_CM_ADDR_QUERY;
2628 work->new_state = RDMA_CM_ADDR_RESOLVED;
2629 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2632 static int cma_resolve_ib_route(struct rdma_id_private *id_priv,
2633 unsigned long timeout_ms)
2635 struct rdma_route *route = &id_priv->id.route;
2636 struct cma_work *work;
2639 work = kzalloc(sizeof *work, GFP_KERNEL);
2643 cma_init_resolve_route_work(work, id_priv);
2645 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
2646 if (!route->path_rec) {
2651 ret = cma_query_ib_route(id_priv, timeout_ms, work);
2657 kfree(route->path_rec);
2658 route->path_rec = NULL;
2664 static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
2665 unsigned long supported_gids,
2666 enum ib_gid_type default_gid)
2668 if ((network_type == RDMA_NETWORK_IPV4 ||
2669 network_type == RDMA_NETWORK_IPV6) &&
2670 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
2671 return IB_GID_TYPE_ROCE_UDP_ENCAP;
2677 * cma_iboe_set_path_rec_l2_fields() is helper function which sets
2678 * path record type based on GID type.
2679 * It also sets up other L2 fields which includes destination mac address
2680 * netdev ifindex, of the path record.
2681 * It returns the netdev of the bound interface for this path record entry.
2683 static struct net_device *
2684 cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
2686 struct rdma_route *route = &id_priv->id.route;
2687 enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
2688 struct rdma_addr *addr = &route->addr;
2689 unsigned long supported_gids;
2690 struct net_device *ndev;
2692 if (!addr->dev_addr.bound_dev_if)
2695 ndev = dev_get_by_index(addr->dev_addr.net,
2696 addr->dev_addr.bound_dev_if);
2700 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
2701 id_priv->id.port_num);
2702 gid_type = cma_route_gid_type(addr->dev_addr.network,
2705 /* Use the hint from IP Stack to select GID Type */
2706 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
2707 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
2708 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
2710 route->path_rec->roce.route_resolved = true;
2711 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
2715 int rdma_set_ib_path(struct rdma_cm_id *id,
2716 struct sa_path_rec *path_rec)
2718 struct rdma_id_private *id_priv;
2719 struct net_device *ndev;
2722 id_priv = container_of(id, struct rdma_id_private, id);
2723 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2724 RDMA_CM_ROUTE_RESOLVED))
2727 id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
2729 if (!id->route.path_rec) {
2734 if (rdma_protocol_roce(id->device, id->port_num)) {
2735 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2743 id->route.num_paths = 1;
2747 kfree(id->route.path_rec);
2748 id->route.path_rec = NULL;
2750 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
2753 EXPORT_SYMBOL(rdma_set_ib_path);
2755 static int cma_resolve_iw_route(struct rdma_id_private *id_priv)
2757 struct cma_work *work;
2759 work = kzalloc(sizeof *work, GFP_KERNEL);
2763 cma_init_resolve_route_work(work, id_priv);
2764 queue_work(cma_wq, &work->work);
2768 static int iboe_tos_to_sl(struct net_device *ndev, int tos)
2771 struct net_device *dev;
2773 prio = rt_tos2priority(tos);
2774 dev = is_vlan_dev(ndev) ? vlan_dev_real_dev(ndev) : ndev;
2776 return netdev_get_prio_tc_map(dev, prio);
2778 #if IS_ENABLED(CONFIG_VLAN_8021Q)
2779 if (is_vlan_dev(ndev))
2780 return (vlan_dev_get_egress_qos_mask(ndev, prio) &
2781 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
2786 static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
2788 struct rdma_route *route = &id_priv->id.route;
2789 struct rdma_addr *addr = &route->addr;
2790 struct cma_work *work;
2792 struct net_device *ndev;
2794 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
2795 rdma_start_port(id_priv->cma_dev->device)];
2796 u8 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
2799 work = kzalloc(sizeof *work, GFP_KERNEL);
2803 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
2804 if (!route->path_rec) {
2809 route->num_paths = 1;
2811 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
2817 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
2818 &route->path_rec->sgid);
2819 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
2820 &route->path_rec->dgid);
2822 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
2823 /* TODO: get the hoplimit from the inet/inet6 device */
2824 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
2826 route->path_rec->hop_limit = 1;
2827 route->path_rec->reversible = 1;
2828 route->path_rec->pkey = cpu_to_be16(0xffff);
2829 route->path_rec->mtu_selector = IB_SA_EQ;
2830 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
2831 route->path_rec->traffic_class = tos;
2832 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
2833 route->path_rec->rate_selector = IB_SA_EQ;
2834 route->path_rec->rate = iboe_get_rate(ndev);
2836 route->path_rec->packet_life_time_selector = IB_SA_EQ;
2837 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
2838 if (!route->path_rec->mtu) {
2843 cma_init_resolve_route_work(work, id_priv);
2844 queue_work(cma_wq, &work->work);
2849 kfree(route->path_rec);
2850 route->path_rec = NULL;
2856 int rdma_resolve_route(struct rdma_cm_id *id, unsigned long timeout_ms)
2858 struct rdma_id_private *id_priv;
2861 id_priv = container_of(id, struct rdma_id_private, id);
2862 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
2865 atomic_inc(&id_priv->refcount);
2866 if (rdma_cap_ib_sa(id->device, id->port_num))
2867 ret = cma_resolve_ib_route(id_priv, timeout_ms);
2868 else if (rdma_protocol_roce(id->device, id->port_num))
2869 ret = cma_resolve_iboe_route(id_priv);
2870 else if (rdma_protocol_iwarp(id->device, id->port_num))
2871 ret = cma_resolve_iw_route(id_priv);
2880 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
2881 cma_deref_id(id_priv);
2884 EXPORT_SYMBOL(rdma_resolve_route);
2886 static void cma_set_loopback(struct sockaddr *addr)
2888 switch (addr->sa_family) {
2890 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
2893 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
2897 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
2903 static int cma_bind_loopback(struct rdma_id_private *id_priv)
2905 struct cma_device *cma_dev, *cur_dev;
2907 enum ib_port_state port_state;
2914 list_for_each_entry(cur_dev, &dev_list, list) {
2915 if (cma_family(id_priv) == AF_IB &&
2916 !rdma_cap_ib_cm(cur_dev->device, 1))
2922 for (p = 1; p <= cur_dev->device->phys_port_cnt; ++p) {
2923 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
2924 port_state == IB_PORT_ACTIVE) {
2939 ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
2943 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
2947 id_priv->id.route.addr.dev_addr.dev_type =
2948 (rdma_protocol_ib(cma_dev->device, p)) ?
2949 ARPHRD_INFINIBAND : ARPHRD_ETHER;
2951 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
2952 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
2953 id_priv->id.port_num = p;
2954 cma_attach_to_dev(id_priv, cma_dev);
2955 cma_set_loopback(cma_src_addr(id_priv));
2957 mutex_unlock(&lock);
2961 static void addr_handler(int status, struct sockaddr *src_addr,
2962 struct rdma_dev_addr *dev_addr, void *context)
2964 struct rdma_id_private *id_priv = context;
2965 struct rdma_cm_event event = {};
2967 mutex_lock(&id_priv->handler_mutex);
2968 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
2969 RDMA_CM_ADDR_RESOLVED))
2972 memcpy(cma_src_addr(id_priv), src_addr, rdma_addr_size(src_addr));
2973 if (!status && !id_priv->cma_dev) {
2974 status = cma_acquire_dev_by_src_ip(id_priv);
2976 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
2979 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
2983 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
2984 RDMA_CM_ADDR_BOUND))
2986 event.event = RDMA_CM_EVENT_ADDR_ERROR;
2987 event.status = status;
2989 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
2991 if (id_priv->id.event_handler(&id_priv->id, &event)) {
2992 cma_exch(id_priv, RDMA_CM_DESTROYING);
2993 mutex_unlock(&id_priv->handler_mutex);
2994 rdma_destroy_id(&id_priv->id);
2998 mutex_unlock(&id_priv->handler_mutex);
3001 static int cma_resolve_loopback(struct rdma_id_private *id_priv)
3003 struct cma_work *work;
3007 work = kzalloc(sizeof *work, GFP_KERNEL);
3011 if (!id_priv->cma_dev) {
3012 ret = cma_bind_loopback(id_priv);
3017 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
3018 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
3020 cma_init_resolve_addr_work(work, id_priv);
3021 queue_work(cma_wq, &work->work);
3028 static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
3030 struct cma_work *work;
3033 work = kzalloc(sizeof *work, GFP_KERNEL);
3037 if (!id_priv->cma_dev) {
3038 ret = cma_resolve_ib_dev(id_priv);
3043 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
3044 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
3046 cma_init_resolve_addr_work(work, id_priv);
3047 queue_work(cma_wq, &work->work);
3054 static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
3055 const struct sockaddr *dst_addr)
3057 if (!src_addr || !src_addr->sa_family) {
3058 src_addr = (struct sockaddr *) &id->route.addr.src_addr;
3059 src_addr->sa_family = dst_addr->sa_family;
3060 if (IS_ENABLED(CONFIG_IPV6) &&
3061 dst_addr->sa_family == AF_INET6) {
3062 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *) src_addr;
3063 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *) dst_addr;
3064 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
3065 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
3066 id->route.addr.dev_addr.bound_dev_if = dst_addr6->sin6_scope_id;
3067 } else if (dst_addr->sa_family == AF_IB) {
3068 ((struct sockaddr_ib *) src_addr)->sib_pkey =
3069 ((struct sockaddr_ib *) dst_addr)->sib_pkey;
3072 return rdma_bind_addr(id, src_addr);
3075 int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
3076 const struct sockaddr *dst_addr, unsigned long timeout_ms)
3078 struct rdma_id_private *id_priv;
3081 id_priv = container_of(id, struct rdma_id_private, id);
3082 if (id_priv->state == RDMA_CM_IDLE) {
3083 ret = cma_bind_addr(id, src_addr, dst_addr);
3088 if (cma_family(id_priv) != dst_addr->sa_family)
3091 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
3094 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
3095 if (cma_any_addr(dst_addr)) {
3096 ret = cma_resolve_loopback(id_priv);
3098 if (dst_addr->sa_family == AF_IB) {
3099 ret = cma_resolve_ib_addr(id_priv);
3101 ret = rdma_resolve_ip(cma_src_addr(id_priv), dst_addr,
3102 &id->route.addr.dev_addr,
3103 timeout_ms, addr_handler,
3112 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
3115 EXPORT_SYMBOL(rdma_resolve_addr);
3117 int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
3119 struct rdma_id_private *id_priv;
3120 unsigned long flags;
3123 id_priv = container_of(id, struct rdma_id_private, id);
3124 spin_lock_irqsave(&id_priv->lock, flags);
3125 if (reuse || id_priv->state == RDMA_CM_IDLE) {
3126 id_priv->reuseaddr = reuse;
3131 spin_unlock_irqrestore(&id_priv->lock, flags);
3134 EXPORT_SYMBOL(rdma_set_reuseaddr);
3136 int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3138 struct rdma_id_private *id_priv;
3139 unsigned long flags;
3142 id_priv = container_of(id, struct rdma_id_private, id);
3143 spin_lock_irqsave(&id_priv->lock, flags);
3144 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3145 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3146 id_priv->afonly = afonly;
3151 spin_unlock_irqrestore(&id_priv->lock, flags);
3154 EXPORT_SYMBOL(rdma_set_afonly);
3156 static void cma_bind_port(struct rdma_bind_list *bind_list,
3157 struct rdma_id_private *id_priv)
3159 struct sockaddr *addr;
3160 struct sockaddr_ib *sib;
3164 addr = cma_src_addr(id_priv);
3165 port = htons(bind_list->port);
3167 switch (addr->sa_family) {
3169 ((struct sockaddr_in *) addr)->sin_port = port;
3172 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3175 sib = (struct sockaddr_ib *) addr;
3176 sid = be64_to_cpu(sib->sib_sid);
3177 mask = be64_to_cpu(sib->sib_sid_mask);
3178 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3179 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3182 id_priv->bind_list = bind_list;
3183 hlist_add_head(&id_priv->node, &bind_list->owners);
3186 static int cma_alloc_port(enum rdma_ucm_port_space ps,
3187 struct rdma_id_private *id_priv, unsigned short snum)
3189 struct rdma_bind_list *bind_list;
3192 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
3196 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3202 bind_list->port = (unsigned short)ret;
3203 cma_bind_port(bind_list, id_priv);
3207 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
3210 static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3211 struct rdma_id_private *id_priv)
3213 struct rdma_id_private *cur_id;
3214 struct sockaddr *daddr = cma_dst_addr(id_priv);
3215 struct sockaddr *saddr = cma_src_addr(id_priv);
3216 __be16 dport = cma_port(daddr);
3218 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3219 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3220 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3221 __be16 cur_dport = cma_port(cur_daddr);
3223 if (id_priv == cur_id)
3226 /* different dest port -> unique */
3227 if (!cma_any_port(daddr) &&
3228 !cma_any_port(cur_daddr) &&
3229 (dport != cur_dport))
3232 /* different src address -> unique */
3233 if (!cma_any_addr(saddr) &&
3234 !cma_any_addr(cur_saddr) &&
3235 cma_addr_cmp(saddr, cur_saddr))
3238 /* different dst address -> unique */
3239 if (!cma_any_addr(daddr) &&
3240 !cma_any_addr(cur_daddr) &&
3241 cma_addr_cmp(daddr, cur_daddr))
3244 return -EADDRNOTAVAIL;
3249 static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
3250 struct rdma_id_private *id_priv)
3252 static unsigned int last_used_port;
3253 int low, high, remaining;
3255 struct net *net = id_priv->id.route.addr.dev_addr.net;
3257 inet_get_local_port_range(net, &low, &high);
3258 remaining = (high - low) + 1;
3259 rover = prandom_u32() % remaining + low;
3261 if (last_used_port != rover) {
3262 struct rdma_bind_list *bind_list;
3265 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3268 ret = cma_alloc_port(ps, id_priv, rover);
3270 ret = cma_port_is_unique(bind_list, id_priv);
3272 cma_bind_port(bind_list, id_priv);
3275 * Remember previously used port number in order to avoid
3276 * re-using same port immediately after it is closed.
3279 last_used_port = rover;
3280 if (ret != -EADDRNOTAVAIL)
3285 if ((rover < low) || (rover > high))
3289 return -EADDRNOTAVAIL;
3293 * Check that the requested port is available. This is called when trying to
3294 * bind to a specific port, or when trying to listen on a bound port. In
3295 * the latter case, the provided id_priv may already be on the bind_list, but
3296 * we still need to check that it's okay to start listening.
3298 static int cma_check_port(struct rdma_bind_list *bind_list,
3299 struct rdma_id_private *id_priv, uint8_t reuseaddr)
3301 struct rdma_id_private *cur_id;
3302 struct sockaddr *addr, *cur_addr;
3304 addr = cma_src_addr(id_priv);
3305 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3306 if (id_priv == cur_id)
3309 if ((cur_id->state != RDMA_CM_LISTEN) && reuseaddr &&
3313 cur_addr = cma_src_addr(cur_id);
3314 if (id_priv->afonly && cur_id->afonly &&
3315 (addr->sa_family != cur_addr->sa_family))
3318 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3319 return -EADDRNOTAVAIL;
3321 if (!cma_addr_cmp(addr, cur_addr))
3327 static int cma_use_port(enum rdma_ucm_port_space ps,
3328 struct rdma_id_private *id_priv)
3330 struct rdma_bind_list *bind_list;
3331 unsigned short snum;
3334 snum = ntohs(cma_port(cma_src_addr(id_priv)));
3335 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3338 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
3340 ret = cma_alloc_port(ps, id_priv, snum);
3342 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3344 cma_bind_port(bind_list, id_priv);
3349 static int cma_bind_listen(struct rdma_id_private *id_priv)
3351 struct rdma_bind_list *bind_list = id_priv->bind_list;
3355 if (bind_list->owners.first->next)
3356 ret = cma_check_port(bind_list, id_priv, 0);
3357 mutex_unlock(&lock);
3361 static enum rdma_ucm_port_space
3362 cma_select_inet_ps(struct rdma_id_private *id_priv)
3364 switch (id_priv->id.ps) {
3369 return id_priv->id.ps;
3376 static enum rdma_ucm_port_space
3377 cma_select_ib_ps(struct rdma_id_private *id_priv)
3379 enum rdma_ucm_port_space ps = 0;
3380 struct sockaddr_ib *sib;
3381 u64 sid_ps, mask, sid;
3383 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
3384 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3385 sid = be64_to_cpu(sib->sib_sid) & mask;
3387 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3388 sid_ps = RDMA_IB_IP_PS_IB;
3390 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3391 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3392 sid_ps = RDMA_IB_IP_PS_TCP;
3394 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3395 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3396 sid_ps = RDMA_IB_IP_PS_UDP;
3401 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3402 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3403 be64_to_cpu(sib->sib_sid_mask));
3408 static int cma_get_port(struct rdma_id_private *id_priv)
3410 enum rdma_ucm_port_space ps;
3413 if (cma_family(id_priv) != AF_IB)
3414 ps = cma_select_inet_ps(id_priv);
3416 ps = cma_select_ib_ps(id_priv);
3418 return -EPROTONOSUPPORT;
3421 if (cma_any_port(cma_src_addr(id_priv)))
3422 ret = cma_alloc_any_port(ps, id_priv);
3424 ret = cma_use_port(ps, id_priv);
3425 mutex_unlock(&lock);
3430 static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3431 struct sockaddr *addr)
3433 #if IS_ENABLED(CONFIG_IPV6)
3434 struct sockaddr_in6 *sin6;
3436 if (addr->sa_family != AF_INET6)
3439 sin6 = (struct sockaddr_in6 *) addr;
3441 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3444 if (!sin6->sin6_scope_id)
3447 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3452 int rdma_listen(struct rdma_cm_id *id, int backlog)
3454 struct rdma_id_private *id_priv;
3457 id_priv = container_of(id, struct rdma_id_private, id);
3458 if (id_priv->state == RDMA_CM_IDLE) {
3459 id->route.addr.src_addr.ss_family = AF_INET;
3460 ret = rdma_bind_addr(id, cma_src_addr(id_priv));
3465 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
3468 if (id_priv->reuseaddr) {
3469 ret = cma_bind_listen(id_priv);
3474 id_priv->backlog = backlog;
3476 if (rdma_cap_ib_cm(id->device, 1)) {
3477 ret = cma_ib_listen(id_priv);
3480 } else if (rdma_cap_iw_cm(id->device, 1)) {
3481 ret = cma_iw_listen(id_priv, backlog);
3489 cma_listen_on_all(id_priv);
3493 id_priv->backlog = 0;
3494 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
3497 EXPORT_SYMBOL(rdma_listen);
3499 int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
3501 struct rdma_id_private *id_priv;
3503 struct sockaddr *daddr;
3505 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
3506 addr->sa_family != AF_IB)
3507 return -EAFNOSUPPORT;
3509 id_priv = container_of(id, struct rdma_id_private, id);
3510 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
3513 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
3517 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
3518 if (!cma_any_addr(addr)) {
3519 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
3523 ret = cma_acquire_dev_by_src_ip(id_priv);
3528 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
3529 if (addr->sa_family == AF_INET)
3530 id_priv->afonly = 1;
3531 #if IS_ENABLED(CONFIG_IPV6)
3532 else if (addr->sa_family == AF_INET6) {
3533 struct net *net = id_priv->id.route.addr.dev_addr.net;
3535 id_priv->afonly = net->ipv6.sysctl.bindv6only;
3539 daddr = cma_dst_addr(id_priv);
3540 daddr->sa_family = addr->sa_family;
3542 ret = cma_get_port(id_priv);
3548 rdma_restrack_del(&id_priv->res);
3549 if (id_priv->cma_dev)
3550 cma_release_dev(id_priv);
3552 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
3555 EXPORT_SYMBOL(rdma_bind_addr);
3557 static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
3559 struct cma_hdr *cma_hdr;
3562 cma_hdr->cma_version = CMA_VERSION;
3563 if (cma_family(id_priv) == AF_INET) {
3564 struct sockaddr_in *src4, *dst4;
3566 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
3567 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
3569 cma_set_ip_ver(cma_hdr, 4);
3570 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
3571 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
3572 cma_hdr->port = src4->sin_port;
3573 } else if (cma_family(id_priv) == AF_INET6) {
3574 struct sockaddr_in6 *src6, *dst6;
3576 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
3577 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
3579 cma_set_ip_ver(cma_hdr, 6);
3580 cma_hdr->src_addr.ip6 = src6->sin6_addr;
3581 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
3582 cma_hdr->port = src6->sin6_port;
3587 static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
3588 const struct ib_cm_event *ib_event)
3590 struct rdma_id_private *id_priv = cm_id->context;
3591 struct rdma_cm_event event = {};
3592 const struct ib_cm_sidr_rep_event_param *rep =
3593 &ib_event->param.sidr_rep_rcvd;
3596 mutex_lock(&id_priv->handler_mutex);
3597 if (id_priv->state != RDMA_CM_CONNECT)
3600 switch (ib_event->event) {
3601 case IB_CM_SIDR_REQ_ERROR:
3602 event.event = RDMA_CM_EVENT_UNREACHABLE;
3603 event.status = -ETIMEDOUT;
3605 case IB_CM_SIDR_REP_RECEIVED:
3606 event.param.ud.private_data = ib_event->private_data;
3607 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
3608 if (rep->status != IB_SIDR_SUCCESS) {
3609 event.event = RDMA_CM_EVENT_UNREACHABLE;
3610 event.status = ib_event->param.sidr_rep_rcvd.status;
3611 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
3615 ret = cma_set_qkey(id_priv, rep->qkey);
3617 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
3618 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3622 ib_init_ah_attr_from_path(id_priv->id.device,
3623 id_priv->id.port_num,
3624 id_priv->id.route.path_rec,
3625 &event.param.ud.ah_attr,
3627 event.param.ud.qp_num = rep->qpn;
3628 event.param.ud.qkey = rep->qkey;
3629 event.event = RDMA_CM_EVENT_ESTABLISHED;
3633 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
3638 ret = id_priv->id.event_handler(&id_priv->id, &event);
3640 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
3642 /* Destroy the CM ID by returning a non-zero value. */
3643 id_priv->cm_id.ib = NULL;
3644 cma_exch(id_priv, RDMA_CM_DESTROYING);
3645 mutex_unlock(&id_priv->handler_mutex);
3646 rdma_destroy_id(&id_priv->id);
3650 mutex_unlock(&id_priv->handler_mutex);
3654 static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
3655 struct rdma_conn_param *conn_param)
3657 struct ib_cm_sidr_req_param req;
3658 struct ib_cm_id *id;
3663 memset(&req, 0, sizeof req);
3664 offset = cma_user_data_offset(id_priv);
3665 req.private_data_len = offset + conn_param->private_data_len;
3666 if (req.private_data_len < conn_param->private_data_len)
3669 if (req.private_data_len) {
3670 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3674 private_data = NULL;
3677 if (conn_param->private_data && conn_param->private_data_len)
3678 memcpy(private_data + offset, conn_param->private_data,
3679 conn_param->private_data_len);
3682 ret = cma_format_hdr(private_data, id_priv);
3685 req.private_data = private_data;
3688 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
3694 id_priv->cm_id.ib = id;
3696 req.path = id_priv->id.route.path_rec;
3697 req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3698 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3699 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
3700 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3702 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
3704 ib_destroy_cm_id(id_priv->cm_id.ib);
3705 id_priv->cm_id.ib = NULL;
3708 kfree(private_data);
3712 static int cma_connect_ib(struct rdma_id_private *id_priv,
3713 struct rdma_conn_param *conn_param)
3715 struct ib_cm_req_param req;
3716 struct rdma_route *route;
3718 struct ib_cm_id *id;
3722 memset(&req, 0, sizeof req);
3723 offset = cma_user_data_offset(id_priv);
3724 req.private_data_len = offset + conn_param->private_data_len;
3725 if (req.private_data_len < conn_param->private_data_len)
3728 if (req.private_data_len) {
3729 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
3733 private_data = NULL;
3736 if (conn_param->private_data && conn_param->private_data_len)
3737 memcpy(private_data + offset, conn_param->private_data,
3738 conn_param->private_data_len);
3740 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
3745 id_priv->cm_id.ib = id;
3747 route = &id_priv->id.route;
3749 ret = cma_format_hdr(private_data, id_priv);
3752 req.private_data = private_data;
3755 req.primary_path = &route->path_rec[0];
3756 if (route->num_paths == 2)
3757 req.alternate_path = &route->path_rec[1];
3759 req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
3760 /* Alternate path SGID attribute currently unsupported */
3761 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
3762 req.qp_num = id_priv->qp_num;
3763 req.qp_type = id_priv->id.qp_type;
3764 req.starting_psn = id_priv->seq_num;
3765 req.responder_resources = conn_param->responder_resources;
3766 req.initiator_depth = conn_param->initiator_depth;
3767 req.flow_control = conn_param->flow_control;
3768 req.retry_count = min_t(u8, 7, conn_param->retry_count);
3769 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3770 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3771 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
3772 req.max_cm_retries = CMA_MAX_CM_RETRIES;
3773 req.srq = id_priv->srq ? 1 : 0;
3775 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
3777 if (ret && !IS_ERR(id)) {
3778 ib_destroy_cm_id(id);
3779 id_priv->cm_id.ib = NULL;
3782 kfree(private_data);
3786 static int cma_connect_iw(struct rdma_id_private *id_priv,
3787 struct rdma_conn_param *conn_param)
3789 struct iw_cm_id *cm_id;
3791 struct iw_cm_conn_param iw_param;
3793 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
3795 return PTR_ERR(cm_id);
3797 cm_id->tos = id_priv->tos;
3798 id_priv->cm_id.iw = cm_id;
3800 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
3801 rdma_addr_size(cma_src_addr(id_priv)));
3802 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
3803 rdma_addr_size(cma_dst_addr(id_priv)));
3805 ret = cma_modify_qp_rtr(id_priv, conn_param);
3810 iw_param.ord = conn_param->initiator_depth;
3811 iw_param.ird = conn_param->responder_resources;
3812 iw_param.private_data = conn_param->private_data;
3813 iw_param.private_data_len = conn_param->private_data_len;
3814 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
3816 memset(&iw_param, 0, sizeof iw_param);
3817 iw_param.qpn = id_priv->qp_num;
3819 ret = iw_cm_connect(cm_id, &iw_param);
3822 iw_destroy_cm_id(cm_id);
3823 id_priv->cm_id.iw = NULL;
3828 int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
3830 struct rdma_id_private *id_priv;
3833 id_priv = container_of(id, struct rdma_id_private, id);
3834 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
3838 id_priv->qp_num = conn_param->qp_num;
3839 id_priv->srq = conn_param->srq;
3842 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3843 if (id->qp_type == IB_QPT_UD)
3844 ret = cma_resolve_ib_udp(id_priv, conn_param);
3846 ret = cma_connect_ib(id_priv, conn_param);
3847 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3848 ret = cma_connect_iw(id_priv, conn_param);
3856 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
3859 EXPORT_SYMBOL(rdma_connect);
3861 static int cma_accept_ib(struct rdma_id_private *id_priv,
3862 struct rdma_conn_param *conn_param)
3864 struct ib_cm_rep_param rep;
3867 ret = cma_modify_qp_rtr(id_priv, conn_param);
3871 ret = cma_modify_qp_rts(id_priv, conn_param);
3875 memset(&rep, 0, sizeof rep);
3876 rep.qp_num = id_priv->qp_num;
3877 rep.starting_psn = id_priv->seq_num;
3878 rep.private_data = conn_param->private_data;
3879 rep.private_data_len = conn_param->private_data_len;
3880 rep.responder_resources = conn_param->responder_resources;
3881 rep.initiator_depth = conn_param->initiator_depth;
3882 rep.failover_accepted = 0;
3883 rep.flow_control = conn_param->flow_control;
3884 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
3885 rep.srq = id_priv->srq ? 1 : 0;
3887 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
3892 static int cma_accept_iw(struct rdma_id_private *id_priv,
3893 struct rdma_conn_param *conn_param)
3895 struct iw_cm_conn_param iw_param;
3901 ret = cma_modify_qp_rtr(id_priv, conn_param);
3905 iw_param.ord = conn_param->initiator_depth;
3906 iw_param.ird = conn_param->responder_resources;
3907 iw_param.private_data = conn_param->private_data;
3908 iw_param.private_data_len = conn_param->private_data_len;
3909 if (id_priv->id.qp) {
3910 iw_param.qpn = id_priv->qp_num;
3912 iw_param.qpn = conn_param->qp_num;
3914 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
3917 static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
3918 enum ib_cm_sidr_status status, u32 qkey,
3919 const void *private_data, int private_data_len)
3921 struct ib_cm_sidr_rep_param rep;
3924 memset(&rep, 0, sizeof rep);
3925 rep.status = status;
3926 if (status == IB_SIDR_SUCCESS) {
3927 ret = cma_set_qkey(id_priv, qkey);
3930 rep.qp_num = id_priv->qp_num;
3931 rep.qkey = id_priv->qkey;
3933 rep.private_data = private_data;
3934 rep.private_data_len = private_data_len;
3936 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
3939 int __rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
3942 struct rdma_id_private *id_priv;
3945 id_priv = container_of(id, struct rdma_id_private, id);
3947 rdma_restrack_set_task(&id_priv->res, caller);
3949 if (!cma_comp(id_priv, RDMA_CM_CONNECT))
3952 if (!id->qp && conn_param) {
3953 id_priv->qp_num = conn_param->qp_num;
3954 id_priv->srq = conn_param->srq;
3957 if (rdma_cap_ib_cm(id->device, id->port_num)) {
3958 if (id->qp_type == IB_QPT_UD) {
3960 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3962 conn_param->private_data,
3963 conn_param->private_data_len);
3965 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
3969 ret = cma_accept_ib(id_priv, conn_param);
3971 ret = cma_rep_recv(id_priv);
3973 } else if (rdma_cap_iw_cm(id->device, id->port_num))
3974 ret = cma_accept_iw(id_priv, conn_param);
3983 cma_modify_qp_err(id_priv);
3984 rdma_reject(id, NULL, 0);
3987 EXPORT_SYMBOL(__rdma_accept);
3989 int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
3991 struct rdma_id_private *id_priv;
3994 id_priv = container_of(id, struct rdma_id_private, id);
3995 if (!id_priv->cm_id.ib)
3998 switch (id->device->node_type) {
3999 case RDMA_NODE_IB_CA:
4000 ret = ib_cm_notify(id_priv->cm_id.ib, event);
4008 EXPORT_SYMBOL(rdma_notify);
4010 int rdma_reject(struct rdma_cm_id *id, const void *private_data,
4011 u8 private_data_len)
4013 struct rdma_id_private *id_priv;
4016 id_priv = container_of(id, struct rdma_id_private, id);
4017 if (!id_priv->cm_id.ib)
4020 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4021 if (id->qp_type == IB_QPT_UD)
4022 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
4023 private_data, private_data_len);
4025 ret = ib_send_cm_rej(id_priv->cm_id.ib,
4026 IB_CM_REJ_CONSUMER_DEFINED, NULL,
4027 0, private_data, private_data_len);
4028 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
4029 ret = iw_cm_reject(id_priv->cm_id.iw,
4030 private_data, private_data_len);
4036 EXPORT_SYMBOL(rdma_reject);
4038 int rdma_disconnect(struct rdma_cm_id *id)
4040 struct rdma_id_private *id_priv;
4043 id_priv = container_of(id, struct rdma_id_private, id);
4044 if (!id_priv->cm_id.ib)
4047 if (rdma_cap_ib_cm(id->device, id->port_num)) {
4048 ret = cma_modify_qp_err(id_priv);
4051 /* Initiate or respond to a disconnect. */
4052 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
4053 ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
4054 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
4055 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
4062 EXPORT_SYMBOL(rdma_disconnect);
4064 static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
4066 struct rdma_id_private *id_priv;
4067 struct cma_multicast *mc = multicast->context;
4068 struct rdma_cm_event event = {};
4071 id_priv = mc->id_priv;
4072 mutex_lock(&id_priv->handler_mutex);
4073 if (id_priv->state != RDMA_CM_ADDR_BOUND &&
4074 id_priv->state != RDMA_CM_ADDR_RESOLVED)
4078 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
4080 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
4082 mutex_lock(&id_priv->qp_mutex);
4083 if (!status && id_priv->id.qp) {
4084 status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
4085 be16_to_cpu(multicast->rec.mlid));
4087 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to attach QP. status %d\n",
4090 mutex_unlock(&id_priv->qp_mutex);
4092 event.status = status;
4093 event.param.ud.private_data = mc->context;
4095 struct rdma_dev_addr *dev_addr =
4096 &id_priv->id.route.addr.dev_addr;
4097 struct net_device *ndev =
4098 dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4099 enum ib_gid_type gid_type =
4100 id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4101 rdma_start_port(id_priv->cma_dev->device)];
4103 event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
4104 ret = ib_init_ah_from_mcmember(id_priv->id.device,
4105 id_priv->id.port_num,
4108 &event.param.ud.ah_attr);
4110 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4112 event.param.ud.qp_num = 0xFFFFFF;
4113 event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
4117 event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
4119 ret = id_priv->id.event_handler(&id_priv->id, &event);
4121 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
4123 cma_exch(id_priv, RDMA_CM_DESTROYING);
4124 mutex_unlock(&id_priv->handler_mutex);
4125 rdma_destroy_id(&id_priv->id);
4130 mutex_unlock(&id_priv->handler_mutex);
4134 static void cma_set_mgid(struct rdma_id_private *id_priv,
4135 struct sockaddr *addr, union ib_gid *mgid)
4137 unsigned char mc_map[MAX_ADDR_LEN];
4138 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4139 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4140 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4142 if (cma_any_addr(addr)) {
4143 memset(mgid, 0, sizeof *mgid);
4144 } else if ((addr->sa_family == AF_INET6) &&
4145 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
4147 /* IPv6 address is an SA assigned MGID. */
4148 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4149 } else if (addr->sa_family == AF_IB) {
4150 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
4151 } else if (addr->sa_family == AF_INET6) {
4152 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4153 if (id_priv->id.ps == RDMA_PS_UDP)
4154 mc_map[7] = 0x01; /* Use RDMA CM signature */
4155 *mgid = *(union ib_gid *) (mc_map + 4);
4157 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
4158 if (id_priv->id.ps == RDMA_PS_UDP)
4159 mc_map[7] = 0x01; /* Use RDMA CM signature */
4160 *mgid = *(union ib_gid *) (mc_map + 4);
4164 static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4165 struct cma_multicast *mc)
4167 struct ib_sa_mcmember_rec rec;
4168 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4169 ib_sa_comp_mask comp_mask;
4172 ib_addr_get_mgid(dev_addr, &rec.mgid);
4173 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4178 ret = cma_set_qkey(id_priv, 0);
4182 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
4183 rec.qkey = cpu_to_be32(id_priv->qkey);
4184 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
4185 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
4186 rec.join_state = mc->join_state;
4188 if ((rec.join_state == BIT(SENDONLY_FULLMEMBER_JOIN)) &&
4189 (!ib_sa_sendonly_fullmem_support(&sa_client,
4191 id_priv->id.port_num))) {
4193 &id_priv->id.device->dev,
4194 "RDMA CM: port %u Unable to multicast join: SM doesn't support Send Only Full Member option\n",
4195 id_priv->id.port_num);
4199 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4200 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4201 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4202 IB_SA_MCMEMBER_REC_FLOW_LABEL |
4203 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4205 if (id_priv->id.ps == RDMA_PS_IPOIB)
4206 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
4207 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4208 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4209 IB_SA_MCMEMBER_REC_MTU |
4210 IB_SA_MCMEMBER_REC_HOP_LIMIT;
4212 mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4213 id_priv->id.port_num, &rec,
4214 comp_mask, GFP_KERNEL,
4215 cma_ib_mc_handler, mc);
4216 return PTR_ERR_OR_ZERO(mc->multicast.ib);
4219 static void iboe_mcast_work_handler(struct work_struct *work)
4221 struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
4222 struct cma_multicast *mc = mw->mc;
4223 struct ib_sa_multicast *m = mc->multicast.ib;
4225 mc->multicast.ib->context = mc;
4226 cma_ib_mc_handler(0, m);
4227 kref_put(&mc->mcref, release_mc);
4231 static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4232 enum ib_gid_type gid_type)
4234 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4235 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4237 if (cma_any_addr(addr)) {
4238 memset(mgid, 0, sizeof *mgid);
4239 } else if (addr->sa_family == AF_INET6) {
4240 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4243 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4245 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
4254 mgid->raw[10] = 0xff;
4255 mgid->raw[11] = 0xff;
4256 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4260 static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4261 struct cma_multicast *mc)
4263 struct iboe_mcast_work *work;
4264 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4266 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4267 struct net_device *ndev = NULL;
4268 enum ib_gid_type gid_type;
4271 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
4273 if (cma_zero_addr((struct sockaddr *)&mc->addr))
4276 work = kzalloc(sizeof *work, GFP_KERNEL);
4280 mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
4281 if (!mc->multicast.ib) {
4286 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4287 rdma_start_port(id_priv->cma_dev->device)];
4288 cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid, gid_type);
4290 mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
4291 if (id_priv->id.ps == RDMA_PS_UDP)
4292 mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
4294 if (dev_addr->bound_dev_if)
4295 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4300 mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
4301 mc->multicast.ib->rec.hop_limit = 1;
4302 mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
4304 if (addr->sa_family == AF_INET) {
4305 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
4306 mc->multicast.ib->rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
4308 err = cma_igmp_send(ndev, &mc->multicast.ib->rec.mgid,
4313 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4317 if (err || !mc->multicast.ib->rec.mtu) {
4322 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
4323 &mc->multicast.ib->rec.port_gid);
4326 INIT_WORK(&work->work, iboe_mcast_work_handler);
4327 kref_get(&mc->mcref);
4328 queue_work(cma_wq, &work->work);
4333 kfree(mc->multicast.ib);
4339 int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
4340 u8 join_state, void *context)
4342 struct rdma_id_private *id_priv;
4343 struct cma_multicast *mc;
4349 id_priv = container_of(id, struct rdma_id_private, id);
4350 if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
4351 !cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
4354 mc = kmalloc(sizeof *mc, GFP_KERNEL);
4358 memcpy(&mc->addr, addr, rdma_addr_size(addr));
4359 mc->context = context;
4360 mc->id_priv = id_priv;
4361 mc->join_state = join_state;
4363 if (rdma_protocol_roce(id->device, id->port_num)) {
4364 kref_init(&mc->mcref);
4365 ret = cma_iboe_join_multicast(id_priv, mc);
4368 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4369 ret = cma_join_ib_multicast(id_priv, mc);
4377 spin_lock(&id_priv->lock);
4378 list_add(&mc->list, &id_priv->mc_list);
4379 spin_unlock(&id_priv->lock);
4386 EXPORT_SYMBOL(rdma_join_multicast);
4388 void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
4390 struct rdma_id_private *id_priv;
4391 struct cma_multicast *mc;
4393 id_priv = container_of(id, struct rdma_id_private, id);
4394 spin_lock_irq(&id_priv->lock);
4395 list_for_each_entry(mc, &id_priv->mc_list, list) {
4396 if (!memcmp(&mc->addr, addr, rdma_addr_size(addr))) {
4397 list_del(&mc->list);
4398 spin_unlock_irq(&id_priv->lock);
4401 ib_detach_mcast(id->qp,
4402 &mc->multicast.ib->rec.mgid,
4403 be16_to_cpu(mc->multicast.ib->rec.mlid));
4405 BUG_ON(id_priv->cma_dev->device != id->device);
4407 if (rdma_cap_ib_mcast(id->device, id->port_num)) {
4408 ib_sa_free_multicast(mc->multicast.ib);
4410 } else if (rdma_protocol_roce(id->device, id->port_num)) {
4411 cma_leave_roce_mc_group(id_priv, mc);
4416 spin_unlock_irq(&id_priv->lock);
4418 EXPORT_SYMBOL(rdma_leave_multicast);
4420 static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
4422 struct rdma_dev_addr *dev_addr;
4423 struct cma_ndev_work *work;
4425 dev_addr = &id_priv->id.route.addr.dev_addr;
4427 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
4428 (net_eq(dev_net(ndev), dev_addr->net)) &&
4429 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
4430 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
4431 ndev->name, &id_priv->id);
4432 work = kzalloc(sizeof *work, GFP_KERNEL);
4436 INIT_WORK(&work->work, cma_ndev_work_handler);
4438 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
4439 atomic_inc(&id_priv->refcount);
4440 queue_work(cma_wq, &work->work);
4446 static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
4449 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
4450 struct cma_device *cma_dev;
4451 struct rdma_id_private *id_priv;
4452 int ret = NOTIFY_DONE;
4454 if (event != NETDEV_BONDING_FAILOVER)
4457 if (!netif_is_bond_master(ndev))
4461 list_for_each_entry(cma_dev, &dev_list, list)
4462 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4463 ret = cma_netdev_change(ndev, id_priv);
4469 mutex_unlock(&lock);
4473 static struct notifier_block cma_nb = {
4474 .notifier_call = cma_netdev_callback
4477 static void cma_add_one(struct ib_device *device)
4479 struct cma_device *cma_dev;
4480 struct rdma_id_private *id_priv;
4482 unsigned long supported_gids = 0;
4484 cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
4488 cma_dev->device = device;
4489 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
4490 sizeof(*cma_dev->default_gid_type),
4492 if (!cma_dev->default_gid_type)
4495 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
4496 sizeof(*cma_dev->default_roce_tos),
4498 if (!cma_dev->default_roce_tos)
4501 for (i = rdma_start_port(device); i <= rdma_end_port(device); i++) {
4502 supported_gids = roce_gid_type_mask_support(device, i);
4503 WARN_ON(!supported_gids);
4504 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
4505 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4506 CMA_PREFERRED_ROCE_GID_TYPE;
4508 cma_dev->default_gid_type[i - rdma_start_port(device)] =
4509 find_first_bit(&supported_gids, BITS_PER_LONG);
4510 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
4513 init_completion(&cma_dev->comp);
4514 atomic_set(&cma_dev->refcount, 1);
4515 INIT_LIST_HEAD(&cma_dev->id_list);
4516 ib_set_client_data(device, &cma_client, cma_dev);
4519 list_add_tail(&cma_dev->list, &dev_list);
4520 list_for_each_entry(id_priv, &listen_any_list, list)
4521 cma_listen_on_dev(id_priv, cma_dev);
4522 mutex_unlock(&lock);
4527 kfree(cma_dev->default_gid_type);
4535 static int cma_remove_id_dev(struct rdma_id_private *id_priv)
4537 struct rdma_cm_event event = {};
4538 enum rdma_cm_state state;
4541 /* Record that we want to remove the device */
4542 state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
4543 if (state == RDMA_CM_DESTROYING)
4546 cma_cancel_operation(id_priv, state);
4547 mutex_lock(&id_priv->handler_mutex);
4549 /* Check for destruction from another callback. */
4550 if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
4553 event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
4554 ret = id_priv->id.event_handler(&id_priv->id, &event);
4556 mutex_unlock(&id_priv->handler_mutex);
4560 static void cma_process_remove(struct cma_device *cma_dev)
4562 struct rdma_id_private *id_priv;
4566 while (!list_empty(&cma_dev->id_list)) {
4567 id_priv = list_entry(cma_dev->id_list.next,
4568 struct rdma_id_private, list);
4570 list_del(&id_priv->listen_list);
4571 list_del_init(&id_priv->list);
4572 atomic_inc(&id_priv->refcount);
4573 mutex_unlock(&lock);
4575 ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
4576 cma_deref_id(id_priv);
4578 rdma_destroy_id(&id_priv->id);
4582 mutex_unlock(&lock);
4584 cma_deref_dev(cma_dev);
4585 wait_for_completion(&cma_dev->comp);
4588 static void cma_remove_one(struct ib_device *device, void *client_data)
4590 struct cma_device *cma_dev = client_data;
4596 list_del(&cma_dev->list);
4597 mutex_unlock(&lock);
4599 cma_process_remove(cma_dev);
4600 kfree(cma_dev->default_roce_tos);
4601 kfree(cma_dev->default_gid_type);
4605 static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
4607 struct nlmsghdr *nlh;
4608 struct rdma_cm_id_stats *id_stats;
4609 struct rdma_id_private *id_priv;
4610 struct rdma_cm_id *id = NULL;
4611 struct cma_device *cma_dev;
4612 int i_dev = 0, i_id = 0;
4615 * We export all of the IDs as a sequence of messages. Each
4616 * ID gets its own netlink message.
4620 list_for_each_entry(cma_dev, &dev_list, list) {
4621 if (i_dev < cb->args[0]) {
4627 list_for_each_entry(id_priv, &cma_dev->id_list, list) {
4628 if (i_id < cb->args[1]) {
4633 id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
4634 sizeof *id_stats, RDMA_NL_RDMA_CM,
4635 RDMA_NL_RDMA_CM_ID_STATS,
4640 memset(id_stats, 0, sizeof *id_stats);
4642 id_stats->node_type = id->route.addr.dev_addr.dev_type;
4643 id_stats->port_num = id->port_num;
4644 id_stats->bound_dev_if =
4645 id->route.addr.dev_addr.bound_dev_if;
4647 if (ibnl_put_attr(skb, nlh,
4648 rdma_addr_size(cma_src_addr(id_priv)),
4649 cma_src_addr(id_priv),
4650 RDMA_NL_RDMA_CM_ATTR_SRC_ADDR))
4652 if (ibnl_put_attr(skb, nlh,
4653 rdma_addr_size(cma_dst_addr(id_priv)),
4654 cma_dst_addr(id_priv),
4655 RDMA_NL_RDMA_CM_ATTR_DST_ADDR))
4658 id_stats->pid = task_pid_vnr(id_priv->res.task);
4659 id_stats->port_space = id->ps;
4660 id_stats->cm_state = id_priv->state;
4661 id_stats->qp_num = id_priv->qp_num;
4662 id_stats->qp_type = id->qp_type;
4665 nlmsg_end(skb, nlh);
4673 mutex_unlock(&lock);
4674 cb->args[0] = i_dev;
4680 static const struct rdma_nl_cbs cma_cb_table[RDMA_NL_RDMA_CM_NUM_OPS] = {
4681 [RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats},
4684 static int cma_init_net(struct net *net)
4686 struct cma_pernet *pernet = cma_pernet(net);
4688 idr_init(&pernet->tcp_ps);
4689 idr_init(&pernet->udp_ps);
4690 idr_init(&pernet->ipoib_ps);
4691 idr_init(&pernet->ib_ps);
4696 static void cma_exit_net(struct net *net)
4698 struct cma_pernet *pernet = cma_pernet(net);
4700 idr_destroy(&pernet->tcp_ps);
4701 idr_destroy(&pernet->udp_ps);
4702 idr_destroy(&pernet->ipoib_ps);
4703 idr_destroy(&pernet->ib_ps);
4706 static struct pernet_operations cma_pernet_operations = {
4707 .init = cma_init_net,
4708 .exit = cma_exit_net,
4709 .id = &cma_pernet_id,
4710 .size = sizeof(struct cma_pernet),
4713 static int __init cma_init(void)
4717 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
4721 ret = register_pernet_subsys(&cma_pernet_operations);
4725 ib_sa_register_client(&sa_client);
4726 register_netdevice_notifier(&cma_nb);
4728 ret = ib_register_client(&cma_client);
4732 rdma_nl_register(RDMA_NL_RDMA_CM, cma_cb_table);
4733 cma_configfs_init();
4738 unregister_netdevice_notifier(&cma_nb);
4739 ib_sa_unregister_client(&sa_client);
4741 destroy_workqueue(cma_wq);
4745 static void __exit cma_cleanup(void)
4747 cma_configfs_exit();
4748 rdma_nl_unregister(RDMA_NL_RDMA_CM);
4749 ib_unregister_client(&cma_client);
4750 unregister_netdevice_notifier(&cma_nb);
4751 ib_sa_unregister_client(&sa_client);
4752 unregister_pernet_subsys(&cma_pernet_operations);
4753 destroy_workqueue(cma_wq);
4756 MODULE_ALIAS_RDMA_NETLINK(RDMA_NL_RDMA_CM, 1);
4758 module_init(cma_init);
4759 module_exit(cma_cleanup);