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treewide: use get_random_u32_below() instead of deprecated function
[linux-block.git] / drivers / infiniband / core / cma.c
CommitLineData
24f52149 1// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
e51060f0
SH		 2/*
3 * Copyright (c) 2005 Voltaire Inc. All rights reserved.
4 * Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
24f52149 5 * Copyright (c) 1999-2019, Mellanox Technologies, Inc. All rights reserved.
e51060f0 6 * Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
e51060f0
SH		 7 */
8
9#include <linux/completion.h>
10#include <linux/in.h>
11#include <linux/in6.h>
12#include <linux/mutex.h>
13#include <linux/random.h>
fc008bdb 14#include <linux/rbtree.h>
bee3c3c9 15#include <linux/igmp.h>
63826753 16#include <linux/xarray.h>
07ebafba 17#include <linux/inetdevice.h>
5a0e3ad6 18#include <linux/slab.h>
e4dd23d7 19#include <linux/module.h>
366cddb4 20#include <net/route.h>
e51060f0 21
4be74b42
HE		 22#include <net/net_namespace.h>
23#include <net/netns/generic.h>
925d046e 24#include <net/netevent.h>
e51060f0 25#include <net/tcp.h>
1f5175ad 26#include <net/ipv6.h>
f887f2ac
HE		 27#include <net/ip_fib.h>
28#include <net/ip6_route.h>
e51060f0
SH		 29
30#include <rdma/rdma_cm.h>
31#include <rdma/rdma_cm_ib.h>
753f618a 32#include <rdma/rdma_netlink.h>
2e2d190c 33#include <rdma/ib.h>
e51060f0
SH		 34#include <rdma/ib_cache.h>
35#include <rdma/ib_cm.h>
36#include <rdma/ib_sa.h>
07ebafba 37#include <rdma/iw_cm.h>
e51060f0 38
218a773f 39#include "core_priv.h"
a3b641af 40#include "cma_priv.h"
ed999f82 41#include "cma_trace.h"
218a773f 42
e51060f0
SH		 43MODULE_AUTHOR("Sean Hefty");
44MODULE_DESCRIPTION("Generic RDMA CM Agent");
45MODULE_LICENSE("Dual BSD/GPL");
46
47#define CMA_CM_RESPONSE_TIMEOUT 20
d5bb7599 48#define CMA_MAX_CM_RETRIES 15
dcb3f974 49#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
3c86aa70 50#define CMA_IBOE_PACKET_LIFETIME 18
5ab2d89b 51#define CMA_PREFERRED_ROCE_GID_TYPE IB_GID_TYPE_ROCE_UDP_ENCAP
e51060f0 52
2b1b5b60
SG		 53static const char * const cma_events[] = {
54 [RDMA_CM_EVENT_ADDR_RESOLVED] = "address resolved",
55 [RDMA_CM_EVENT_ADDR_ERROR] = "address error",
56 [RDMA_CM_EVENT_ROUTE_RESOLVED] = "route resolved ",
57 [RDMA_CM_EVENT_ROUTE_ERROR] = "route error",
58 [RDMA_CM_EVENT_CONNECT_REQUEST] = "connect request",
59 [RDMA_CM_EVENT_CONNECT_RESPONSE] = "connect response",
60 [RDMA_CM_EVENT_CONNECT_ERROR] = "connect error",
61 [RDMA_CM_EVENT_UNREACHABLE] = "unreachable",
62 [RDMA_CM_EVENT_REJECTED] = "rejected",
63 [RDMA_CM_EVENT_ESTABLISHED] = "established",
64 [RDMA_CM_EVENT_DISCONNECTED] = "disconnected",
65 [RDMA_CM_EVENT_DEVICE_REMOVAL] = "device removal",
66 [RDMA_CM_EVENT_MULTICAST_JOIN] = "multicast join",
67 [RDMA_CM_EVENT_MULTICAST_ERROR] = "multicast error",
68 [RDMA_CM_EVENT_ADDR_CHANGE] = "address change",
69 [RDMA_CM_EVENT_TIMEWAIT_EXIT] = "timewait exit",
70};
71
d9e410eb
MG		 72static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
73 enum ib_gid_type gid_type);
b5de0c60 74
db7489e0 75const char *__attribute_const__ rdma_event_msg(enum rdma_cm_event_type event)
2b1b5b60
SG		 76{
77 size_t index = event;
78
79 return (index < ARRAY_SIZE(cma_events) && cma_events[index]) ?
80 cma_events[index] : "unrecognized event";
81}
82EXPORT_SYMBOL(rdma_event_msg);
83
77a5db13
SW		 84const char *__attribute_const__ rdma_reject_msg(struct rdma_cm_id *id,
85 int reason)
86{
87 if (rdma_ib_or_roce(id->device, id->port_num))
88 return ibcm_reject_msg(reason);
89
90 if (rdma_protocol_iwarp(id->device, id->port_num))
91 return iwcm_reject_msg(reason);
92
93 WARN_ON_ONCE(1);
94 return "unrecognized transport";
95}
96EXPORT_SYMBOL(rdma_reject_msg);
97
dd302ee4
LR		 98/**
99 * rdma_is_consumer_reject - return true if the consumer rejected the connect
100 * request.
101 * @id: Communication identifier that received the REJECT event.
102 * @reason: Value returned in the REJECT event status field.
103 */
104static bool rdma_is_consumer_reject(struct rdma_cm_id *id, int reason)
5042a73d
SW		 105{
106 if (rdma_ib_or_roce(id->device, id->port_num))
107 return reason == IB_CM_REJ_CONSUMER_DEFINED;
108
109 if (rdma_protocol_iwarp(id->device, id->port_num))
110 return reason == -ECONNREFUSED;
111
112 WARN_ON_ONCE(1);
113 return false;
114}
5042a73d 115
5f244104
SW		 116const void *rdma_consumer_reject_data(struct rdma_cm_id *id,
117 struct rdma_cm_event *ev, u8 *data_len)
118{
119 const void *p;
120
121 if (rdma_is_consumer_reject(id, ev->status)) {
122 *data_len = ev->param.conn.private_data_len;
123 p = ev->param.conn.private_data;
124 } else {
125 *data_len = 0;
126 p = NULL;
127 }
128 return p;
129}
130EXPORT_SYMBOL(rdma_consumer_reject_data);
131
fbdb0a91
SW		 132/**
133 * rdma_iw_cm_id() - return the iw_cm_id pointer for this cm_id.
134 * @id: Communication Identifier
135 */
136struct iw_cm_id *rdma_iw_cm_id(struct rdma_cm_id *id)
137{
138 struct rdma_id_private *id_priv;
139
140 id_priv = container_of(id, struct rdma_id_private, id);
141 if (id->device->node_type == RDMA_NODE_RNIC)
142 return id_priv->cm_id.iw;
143 return NULL;
144}
145EXPORT_SYMBOL(rdma_iw_cm_id);
146
147/**
148 * rdma_res_to_id() - return the rdma_cm_id pointer for this restrack.
149 * @res: rdma resource tracking entry pointer
150 */
151struct rdma_cm_id *rdma_res_to_id(struct rdma_restrack_entry *res)
152{
153 struct rdma_id_private *id_priv =
154 container_of(res, struct rdma_id_private, res);
155
156 return &id_priv->id;
157}
158EXPORT_SYMBOL(rdma_res_to_id);
159
11a0ae4c 160static int cma_add_one(struct ib_device *device);
7c1eb45a 161static void cma_remove_one(struct ib_device *device, void *client_data);
e51060f0
SH		 162
163static struct ib_client cma_client = {
164 .name = "cma",
165 .add = cma_add_one,
166 .remove = cma_remove_one
167};
168
c1a0b23b 169static struct ib_sa_client sa_client;
e51060f0
SH		 170static LIST_HEAD(dev_list);
171static LIST_HEAD(listen_any_list);
172static DEFINE_MUTEX(lock);
fc008bdb
PH		 173static struct rb_root id_table = RB_ROOT;
174/* Serialize operations of id_table tree */
175static DEFINE_SPINLOCK(id_table_lock);
e51060f0 176static struct workqueue_struct *cma_wq;
c7d03a00 177static unsigned int cma_pernet_id;
e51060f0 178
4be74b42 179struct cma_pernet {
63826753
MW		 180 struct xarray tcp_ps;
181 struct xarray udp_ps;
182 struct xarray ipoib_ps;
183 struct xarray ib_ps;
4be74b42
HE		 184};
185
186static struct cma_pernet *cma_pernet(struct net *net)
187{
188 return net_generic(net, cma_pernet_id);
189}
190
63826753
MW		 191static
192struct xarray *cma_pernet_xa(struct net *net, enum rdma_ucm_port_space ps)
aac978e1 193{
4be74b42
HE		 194 struct cma_pernet *pernet = cma_pernet(net);
195
aac978e1
HE		 196 switch (ps) {
197 case RDMA_PS_TCP:
4be74b42 198 return &pernet->tcp_ps;
aac978e1 199 case RDMA_PS_UDP:
4be74b42 200 return &pernet->udp_ps;
aac978e1 201 case RDMA_PS_IPOIB:
4be74b42 202 return &pernet->ipoib_ps;
aac978e1 203 case RDMA_PS_IB:
4be74b42 204 return &pernet->ib_ps;
aac978e1
HE		 205 default:
206 return NULL;
207 }
208}
209
fc008bdb
PH		 210struct id_table_entry {
211 struct list_head id_list;
212 struct rb_node rb_node;
213};
214
e51060f0
SH		 215struct cma_device {
216 struct list_head list;
217 struct ib_device *device;
e51060f0 218 struct completion comp;
be439912 219 refcount_t refcount;
e51060f0 220 struct list_head id_list;
045959db 221 enum ib_gid_type *default_gid_type;
89052d78 222 u8 *default_roce_tos;
e51060f0
SH		 223};
224
e51060f0 225struct rdma_bind_list {
2253fc0c 226 enum rdma_ucm_port_space ps;
e51060f0
SH		 227 struct hlist_head owners;
228 unsigned short port;
229};
230
2253fc0c 231static int cma_ps_alloc(struct net *net, enum rdma_ucm_port_space ps,
aac978e1
HE		 232 struct rdma_bind_list *bind_list, int snum)
233{
63826753 234 struct xarray *xa = cma_pernet_xa(net, ps);
aac978e1 235
63826753 236 return xa_insert(xa, snum, bind_list, GFP_KERNEL);
aac978e1
HE		 237}
238
4be74b42 239static struct rdma_bind_list *cma_ps_find(struct net *net,
2253fc0c 240 enum rdma_ucm_port_space ps, int snum)
aac978e1 241{
63826753 242 struct xarray *xa = cma_pernet_xa(net, ps);
aac978e1 243
63826753 244 return xa_load(xa, snum);
aac978e1
HE		 245}
246
2253fc0c
SW		 247static void cma_ps_remove(struct net *net, enum rdma_ucm_port_space ps,
248 int snum)
aac978e1 249{
63826753 250 struct xarray *xa = cma_pernet_xa(net, ps);
aac978e1 251
63826753 252 xa_erase(xa, snum);
aac978e1
HE		 253}
254
68602120
SH		 255enum {
256 CMA_OPTION_AFONLY,
257};
258
5ff8c8fa 259void cma_dev_get(struct cma_device *cma_dev)
218a773f 260{
be439912 261 refcount_inc(&cma_dev->refcount);
218a773f
MB		 262}
263
5ff8c8fa
PP		 264void cma_dev_put(struct cma_device *cma_dev)
265{
be439912 266 if (refcount_dec_and_test(&cma_dev->refcount))
5ff8c8fa
PP		 267 complete(&cma_dev->comp);
268}
269
045959db
MB		 270struct cma_device *cma_enum_devices_by_ibdev(cma_device_filter filter,
271 void *cookie)
272{
273 struct cma_device *cma_dev;
274 struct cma_device *found_cma_dev = NULL;
275
276 mutex_lock(&lock);
277
278 list_for_each_entry(cma_dev, &dev_list, list)
279 if (filter(cma_dev->device, cookie)) {
280 found_cma_dev = cma_dev;
281 break;
282 }
283
284 if (found_cma_dev)
5ff8c8fa 285 cma_dev_get(found_cma_dev);
045959db
MB		 286 mutex_unlock(&lock);
287 return found_cma_dev;
288}
289
290int cma_get_default_gid_type(struct cma_device *cma_dev,
1fb7f897 291 u32 port)
045959db 292{
24dc831b 293 if (!rdma_is_port_valid(cma_dev->device, port))
045959db
MB		 294 return -EINVAL;
295
296 return cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)];
297}
298
299int cma_set_default_gid_type(struct cma_device *cma_dev,
1fb7f897 300 u32 port,
045959db
MB		 301 enum ib_gid_type default_gid_type)
302{
303 unsigned long supported_gids;
304
24dc831b 305 if (!rdma_is_port_valid(cma_dev->device, port))
045959db
MB		 306 return -EINVAL;
307
1c15b4f2
AH		 308 if (default_gid_type == IB_GID_TYPE_IB &&
309 rdma_protocol_roce_eth_encap(cma_dev->device, port))
310 default_gid_type = IB_GID_TYPE_ROCE;
311
045959db
MB		 312 supported_gids = roce_gid_type_mask_support(cma_dev->device, port);
313
314 if (!(supported_gids & 1 << default_gid_type))
315 return -EINVAL;
316
317 cma_dev->default_gid_type[port - rdma_start_port(cma_dev->device)] =
318 default_gid_type;
319
320 return 0;
321}
322
1fb7f897 323int cma_get_default_roce_tos(struct cma_device *cma_dev, u32 port)
89052d78
MD		 324{
325 if (!rdma_is_port_valid(cma_dev->device, port))
326 return -EINVAL;
327
328 return cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)];
329}
330
1fb7f897 331int cma_set_default_roce_tos(struct cma_device *cma_dev, u32 port,
89052d78
MD		 332 u8 default_roce_tos)
333{
334 if (!rdma_is_port_valid(cma_dev->device, port))
335 return -EINVAL;
336
337 cma_dev->default_roce_tos[port - rdma_start_port(cma_dev->device)] =
338 default_roce_tos;
339
340 return 0;
341}
045959db
MB		 342struct ib_device *cma_get_ib_dev(struct cma_device *cma_dev)
343{
344 return cma_dev->device;
345}
346
e51060f0
SH		 347/*
348 * Device removal can occur at anytime, so we need extra handling to
349 * serialize notifying the user of device removal with other callbacks.
350 * We do this by disabling removal notification while a callback is in process,
351 * and reporting it after the callback completes.
352 */
e51060f0 353
c8f6a362
SH		 354struct cma_multicast {
355 struct rdma_id_private *id_priv;
fe454dc3
AH		 356 union {
357 struct ib_sa_multicast *sa_mc;
358 struct {
359 struct work_struct work;
360 struct rdma_cm_event event;
361 } iboe_join;
362 };
c8f6a362
SH		 363 struct list_head list;
364 void *context;
3f446754 365 struct sockaddr_storage addr;
ab15c95a 366 u8 join_state;
c8f6a362
SH		 367};
368
e51060f0
SH		 369struct cma_work {
370 struct work_struct work;
371 struct rdma_id_private *id;
550e5ca7
NM		 372 enum rdma_cm_state old_state;
373 enum rdma_cm_state new_state;
e51060f0
SH		 374 struct rdma_cm_event event;
375};
376
377union cma_ip_addr {
378 struct in6_addr ip6;
379 struct {
1b90c137
AV		 380 __be32 pad[3];
381 __be32 addr;
e51060f0
SH		 382 } ip4;
383};
384
385struct cma_hdr {
386 u8 cma_version;
387 u8 ip_version; /* IP version: 7:4 */
1b90c137 388 __be16 port;
e51060f0
SH		 389 union cma_ip_addr src_addr;
390 union cma_ip_addr dst_addr;
391};
392
e51060f0 393#define CMA_VERSION 0x00
e51060f0 394
4c21b5bc 395struct cma_req_info {
2918c1a9
PP		 396 struct sockaddr_storage listen_addr_storage;
397 struct sockaddr_storage src_addr_storage;
4c21b5bc 398 struct ib_device *device;
4c21b5bc
HE		 399 union ib_gid local_gid;
400 __be64 service_id;
05e0b86c
PP		 401 int port;
402 bool has_gid;
4c21b5bc 403 u16 pkey;
4c21b5bc
HE		 404};
405
e51060f0 406static int cma_comp_exch(struct rdma_id_private *id_priv,
550e5ca7 407 enum rdma_cm_state comp, enum rdma_cm_state exch)
e51060f0
SH		 408{
409 unsigned long flags;
410 int ret;
411
2a7cec53
JG		 412 /*
413 * The FSM uses a funny double locking where state is protected by both
414 * the handler_mutex and the spinlock. State is not allowed to change
071ba4cc 415 * to/from a handler_mutex protected value without also holding
2a7cec53
JG		 416 * handler_mutex.
417 */
071ba4cc 418 if (comp == RDMA_CM_CONNECT || exch == RDMA_CM_CONNECT)
2a7cec53
JG		 419 lockdep_assert_held(&id_priv->handler_mutex);
420
e51060f0
SH		 421 spin_lock_irqsave(&id_priv->lock, flags);
422 if ((ret = (id_priv->state == comp)))
423 id_priv->state = exch;
424 spin_unlock_irqrestore(&id_priv->lock, flags);
425 return ret;
426}
427
4c21b5bc 428static inline u8 cma_get_ip_ver(const struct cma_hdr *hdr)
e51060f0
SH		 429{
430 return hdr->ip_version >> 4;
431}
432
fc008bdb 433static void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
e51060f0
SH		 434{
435 hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
436}
437
fc008bdb
PH		 438static struct sockaddr *cma_src_addr(struct rdma_id_private *id_priv)
439{
440 return (struct sockaddr *)&id_priv->id.route.addr.src_addr;
441}
442
443static inline struct sockaddr *cma_dst_addr(struct rdma_id_private *id_priv)
444{
445 return (struct sockaddr *)&id_priv->id.route.addr.dst_addr;
446}
447
bee3c3c9 448static int cma_igmp_send(struct net_device *ndev, union ib_gid *mgid, bool join)
e51060f0 449{
bee3c3c9
MS		 450 struct in_device *in_dev = NULL;
451
452 if (ndev) {
453 rtnl_lock();
454 in_dev = __in_dev_get_rtnl(ndev);
455 if (in_dev) {
456 if (join)
457 ip_mc_inc_group(in_dev,
458 *(__be32 *)(mgid->raw + 12));
459 else
460 ip_mc_dec_group(in_dev,
461 *(__be32 *)(mgid->raw + 12));
462 }
463 rtnl_unlock();
464 }
465 return (in_dev) ? 0 : -ENODEV;
466}
467
fc008bdb
PH		 468static int compare_netdev_and_ip(int ifindex_a, struct sockaddr *sa,
469 struct id_table_entry *entry_b)
470{
471 struct rdma_id_private *id_priv = list_first_entry(
472 &entry_b->id_list, struct rdma_id_private, id_list_entry);
473 int ifindex_b = id_priv->id.route.addr.dev_addr.bound_dev_if;
474 struct sockaddr *sb = cma_dst_addr(id_priv);
475
476 if (ifindex_a != ifindex_b)
477 return (ifindex_a > ifindex_b) ? 1 : -1;
478
479 if (sa->sa_family != sb->sa_family)
480 return sa->sa_family - sb->sa_family;
481
482 if (sa->sa_family == AF_INET)
483 return memcmp((char *)&((struct sockaddr_in *)sa)->sin_addr,
484 (char *)&((struct sockaddr_in *)sb)->sin_addr,
485 sizeof(((struct sockaddr_in *)sa)->sin_addr));
486
487 return ipv6_addr_cmp(&((struct sockaddr_in6 *)sa)->sin6_addr,
488 &((struct sockaddr_in6 *)sb)->sin6_addr);
489}
490
491static int cma_add_id_to_tree(struct rdma_id_private *node_id_priv)
492{
493 struct rb_node **new, *parent = NULL;
494 struct id_table_entry *this, *node;
495 unsigned long flags;
496 int result;
497
498 node = kzalloc(sizeof(*node), GFP_KERNEL);
499 if (!node)
500 return -ENOMEM;
501
502 spin_lock_irqsave(&id_table_lock, flags);
503 new = &id_table.rb_node;
504 while (*new) {
505 this = container_of(*new, struct id_table_entry, rb_node);
506 result = compare_netdev_and_ip(
507 node_id_priv->id.route.addr.dev_addr.bound_dev_if,
508 cma_dst_addr(node_id_priv), this);
509
510 parent = *new;
511 if (result < 0)
512 new = &((*new)->rb_left);
513 else if (result > 0)
514 new = &((*new)->rb_right);
515 else {
516 list_add_tail(&node_id_priv->id_list_entry,
517 &this->id_list);
518 kfree(node);
519 goto unlock;
520 }
521 }
522
523 INIT_LIST_HEAD(&node->id_list);
524 list_add_tail(&node_id_priv->id_list_entry, &node->id_list);
525
526 rb_link_node(&node->rb_node, parent, new);
527 rb_insert_color(&node->rb_node, &id_table);
528
529unlock:
530 spin_unlock_irqrestore(&id_table_lock, flags);
531 return 0;
532}
533
534static struct id_table_entry *
535node_from_ndev_ip(struct rb_root *root, int ifindex, struct sockaddr *sa)
536{
537 struct rb_node *node = root->rb_node;
538 struct id_table_entry *data;
539 int result;
540
541 while (node) {
542 data = container_of(node, struct id_table_entry, rb_node);
543 result = compare_netdev_and_ip(ifindex, sa, data);
544 if (result < 0)
545 node = node->rb_left;
546 else if (result > 0)
547 node = node->rb_right;
548 else
549 return data;
550 }
551
552 return NULL;
553}
554
555static void cma_remove_id_from_tree(struct rdma_id_private *id_priv)
556{
557 struct id_table_entry *data;
558 unsigned long flags;
559
560 spin_lock_irqsave(&id_table_lock, flags);
561 if (list_empty(&id_priv->id_list_entry))
562 goto out;
563
564 data = node_from_ndev_ip(&id_table,
565 id_priv->id.route.addr.dev_addr.bound_dev_if,
566 cma_dst_addr(id_priv));
567 if (!data)
568 goto out;
569
570 list_del_init(&id_priv->id_list_entry);
571 if (list_empty(&data->id_list)) {
572 rb_erase(&data->rb_node, &id_table);
573 kfree(data);
574 }
575out:
576 spin_unlock_irqrestore(&id_table_lock, flags);
577}
578
045959db
MB		 579static void _cma_attach_to_dev(struct rdma_id_private *id_priv,
580 struct cma_device *cma_dev)
e51060f0 581{
5ff8c8fa 582 cma_dev_get(cma_dev);
e51060f0
SH		 583 id_priv->cma_dev = cma_dev;
584 id_priv->id.device = cma_dev->device;
3c86aa70
EC		 585 id_priv->id.route.addr.dev_addr.transport =
586 rdma_node_get_transport(cma_dev->device->node_type);
99cfddb8 587 list_add_tail(&id_priv->device_item, &cma_dev->id_list);
b09c4d70 588
278f74b3 589 trace_cm_id_attach(id_priv, cma_dev->device);
e51060f0
SH		 590}
591
045959db
MB		 592static void cma_attach_to_dev(struct rdma_id_private *id_priv,
593 struct cma_device *cma_dev)
594{
595 _cma_attach_to_dev(id_priv, cma_dev);
596 id_priv->gid_type =
597 cma_dev->default_gid_type[id_priv->id.port_num -
598 rdma_start_port(cma_dev->device)];
599}
600
a396d43a 601static void cma_release_dev(struct rdma_id_private *id_priv)
e51060f0 602{
a396d43a 603 mutex_lock(&lock);
99cfddb8 604 list_del_init(&id_priv->device_item);
5ff8c8fa 605 cma_dev_put(id_priv->cma_dev);
e51060f0 606 id_priv->cma_dev = NULL;
889d916b 607 id_priv->id.device = NULL;
e246b7c0
LR		 608 if (id_priv->id.route.addr.dev_addr.sgid_attr) {
609 rdma_put_gid_attr(id_priv->id.route.addr.dev_addr.sgid_attr);
610 id_priv->id.route.addr.dev_addr.sgid_attr = NULL;
611 }
a396d43a 612 mutex_unlock(&lock);
e51060f0
SH		 613}
614
f4753834
SH		 615static inline unsigned short cma_family(struct rdma_id_private *id_priv)
616{
617 return id_priv->id.route.addr.src_addr.ss_family;
618}
619
5c438135 620static int cma_set_qkey(struct rdma_id_private *id_priv, u32 qkey)
c8f6a362
SH		 621{
622 struct ib_sa_mcmember_rec rec;
623 int ret = 0;
624
5c438135
SH		 625 if (id_priv->qkey) {
626 if (qkey && id_priv->qkey != qkey)
627 return -EINVAL;
d2ca39f2 628 return 0;
5c438135
SH		 629 }
630
631 if (qkey) {
632 id_priv->qkey = qkey;
633 return 0;
634 }
d2ca39f2
YE		 635
636 switch (id_priv->id.ps) {
c8f6a362 637 case RDMA_PS_UDP:
5c438135 638 case RDMA_PS_IB:
d2ca39f2 639 id_priv->qkey = RDMA_UDP_QKEY;
c8f6a362
SH		 640 break;
641 case RDMA_PS_IPOIB:
d2ca39f2
YE		 642 ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
643 ret = ib_sa_get_mcmember_rec(id_priv->id.device,
644 id_priv->id.port_num, &rec.mgid,
645 &rec);
646 if (!ret)
647 id_priv->qkey = be32_to_cpu(rec.qkey);
c8f6a362
SH		 648 break;
649 default:
650 break;
651 }
652 return ret;
653}
654
680f920a
SH		 655static void cma_translate_ib(struct sockaddr_ib *sib, struct rdma_dev_addr *dev_addr)
656{
657 dev_addr->dev_type = ARPHRD_INFINIBAND;
658 rdma_addr_set_sgid(dev_addr, (union ib_gid *) &sib->sib_addr);
659 ib_addr_set_pkey(dev_addr, ntohs(sib->sib_pkey));
660}
661
662static int cma_translate_addr(struct sockaddr *addr, struct rdma_dev_addr *dev_addr)
663{
664 int ret;
665
666 if (addr->sa_family != AF_IB) {
575c7e58 667 ret = rdma_translate_ip(addr, dev_addr);
680f920a
SH		 668 } else {
669 cma_translate_ib((struct sockaddr_ib *) addr, dev_addr);
670 ret = 0;
671 }
672
673 return ret;
674}
675
4ed13a5f 676static const struct ib_gid_attr *
1fb7f897 677cma_validate_port(struct ib_device *device, u32 port,
4ed13a5f
PP		 678 enum ib_gid_type gid_type,
679 union ib_gid *gid,
680 struct rdma_id_private *id_priv)
7c11147d 681{
2493a57b
PP		 682 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
683 int bound_if_index = dev_addr->bound_dev_if;
4ed13a5f 684 const struct ib_gid_attr *sgid_attr;
2493a57b 685 int dev_type = dev_addr->dev_type;
abae1b71 686 struct net_device *ndev = NULL;
7c11147d 687
41c61401
PP		 688 if (!rdma_dev_access_netns(device, id_priv->id.route.addr.dev_addr.net))
689 return ERR_PTR(-ENODEV);
690
7c11147d 691 if ((dev_type == ARPHRD_INFINIBAND) && !rdma_protocol_ib(device, port))
4ed13a5f 692 return ERR_PTR(-ENODEV);
7c11147d
MW		 693
694 if ((dev_type != ARPHRD_INFINIBAND) && rdma_protocol_ib(device, port))
4ed13a5f 695 return ERR_PTR(-ENODEV);
7c11147d 696
00db63c1 697 if (dev_type == ARPHRD_ETHER && rdma_protocol_roce(device, port)) {
66c74d74 698 ndev = dev_get_by_index(dev_addr->net, bound_if_index);
00db63c1 699 if (!ndev)
4ed13a5f 700 return ERR_PTR(-ENODEV);
00db63c1 701 } else {
045959db 702 gid_type = IB_GID_TYPE_IB;
00db63c1 703 }
abae1b71 704
4ed13a5f 705 sgid_attr = rdma_find_gid_by_port(device, gid, gid_type, port, ndev);
abae1b71
MB		 706 if (ndev)
707 dev_put(ndev);
4ed13a5f
PP		 708 return sgid_attr;
709}
7c11147d 710
4ed13a5f
PP		 711static void cma_bind_sgid_attr(struct rdma_id_private *id_priv,
712 const struct ib_gid_attr *sgid_attr)
713{
714 WARN_ON(id_priv->id.route.addr.dev_addr.sgid_attr);
715 id_priv->id.route.addr.dev_addr.sgid_attr = sgid_attr;
7c11147d
MW		 716}
717
ff11c6cd
PP		 718/**
719 * cma_acquire_dev_by_src_ip - Acquire cma device, port, gid attribute
720 * based on source ip address.
721 * @id_priv: cm_id which should be bound to cma device
722 *
723 * cma_acquire_dev_by_src_ip() binds cm id to cma device, port and GID attribute
724 * based on source IP address. It returns 0 on success or error code otherwise.
725 * It is applicable to active and passive side cm_id.
726 */
727static int cma_acquire_dev_by_src_ip(struct rdma_id_private *id_priv)
728{
729 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
730 const struct ib_gid_attr *sgid_attr;
731 union ib_gid gid, iboe_gid, *gidp;
732 struct cma_device *cma_dev;
733 enum ib_gid_type gid_type;
734 int ret = -ENODEV;
1fb7f897 735 u32 port;
ff11c6cd
PP		 736
737 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
738 id_priv->id.ps == RDMA_PS_IPOIB)
739 return -EINVAL;
740
741 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
742 &iboe_gid);
743
744 memcpy(&gid, dev_addr->src_dev_addr +
745 rdma_addr_gid_offset(dev_addr), sizeof(gid));
746
747 mutex_lock(&lock);
748 list_for_each_entry(cma_dev, &dev_list, list) {
ea1075ed 749 rdma_for_each_port (cma_dev->device, port) {
ff11c6cd
PP		 750 gidp = rdma_protocol_roce(cma_dev->device, port) ?
751 &iboe_gid : &gid;
752 gid_type = cma_dev->default_gid_type[port - 1];
753 sgid_attr = cma_validate_port(cma_dev->device, port,
754 gid_type, gidp, id_priv);
755 if (!IS_ERR(sgid_attr)) {
756 id_priv->id.port_num = port;
757 cma_bind_sgid_attr(id_priv, sgid_attr);
758 cma_attach_to_dev(id_priv, cma_dev);
759 ret = 0;
760 goto out;
761 }
762 }
763 }
764out:
765 mutex_unlock(&lock);
766 return ret;
767}
768
41ab1cb7
PP		 769/**
770 * cma_ib_acquire_dev - Acquire cma device, port and SGID attribute
771 * @id_priv: cm id to bind to cma device
772 * @listen_id_priv: listener cm id to match against
773 * @req: Pointer to req structure containaining incoming
774 * request information
775 * cma_ib_acquire_dev() acquires cma device, port and SGID attribute when
776 * rdma device matches for listen_id and incoming request. It also verifies
777 * that a GID table entry is present for the source address.
778 * Returns 0 on success, or returns error code otherwise.
779 */
780static int cma_ib_acquire_dev(struct rdma_id_private *id_priv,
781 const struct rdma_id_private *listen_id_priv,
782 struct cma_req_info *req)
783{
784 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
785 const struct ib_gid_attr *sgid_attr;
786 enum ib_gid_type gid_type;
787 union ib_gid gid;
788
789 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
790 id_priv->id.ps == RDMA_PS_IPOIB)
791 return -EINVAL;
792
793 if (rdma_protocol_roce(req->device, req->port))
794 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
795 &gid);
796 else
797 memcpy(&gid, dev_addr->src_dev_addr +
798 rdma_addr_gid_offset(dev_addr), sizeof(gid));
799
800 gid_type = listen_id_priv->cma_dev->default_gid_type[req->port - 1];
801 sgid_attr = cma_validate_port(req->device, req->port,
802 gid_type, &gid, id_priv);
803 if (IS_ERR(sgid_attr))
804 return PTR_ERR(sgid_attr);
805
806 id_priv->id.port_num = req->port;
807 cma_bind_sgid_attr(id_priv, sgid_attr);
808 /* Need to acquire lock to protect against reader
809 * of cma_dev->id_list such as cma_netdev_callback() and
810 * cma_process_remove().
811 */
812 mutex_lock(&lock);
813 cma_attach_to_dev(id_priv, listen_id_priv->cma_dev);
814 mutex_unlock(&lock);
cb5cd0ea 815 rdma_restrack_add(&id_priv->res);
41ab1cb7
PP		 816 return 0;
817}
818
819static int cma_iw_acquire_dev(struct rdma_id_private *id_priv,
820 const struct rdma_id_private *listen_id_priv)
e51060f0 821{
c8f6a362 822 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4ed13a5f 823 const struct ib_gid_attr *sgid_attr;
e51060f0 824 struct cma_device *cma_dev;
4ed13a5f 825 enum ib_gid_type gid_type;
e51060f0 826 int ret = -ENODEV;
41ab1cb7 827 union ib_gid gid;
1fb7f897 828 u32 port;
e51060f0 829
7c11147d 830 if (dev_addr->dev_type != ARPHRD_INFINIBAND &&
2efdd6a0
MS		 831 id_priv->id.ps == RDMA_PS_IPOIB)
832 return -EINVAL;
833
3c86aa70 834 memcpy(&gid, dev_addr->src_dev_addr +
41ab1cb7
PP		 835 rdma_addr_gid_offset(dev_addr), sizeof(gid));
836
837 mutex_lock(&lock);
7c11147d 838
ff11c6cd
PP		 839 cma_dev = listen_id_priv->cma_dev;
840 port = listen_id_priv->id.port_num;
ff11c6cd
PP		 841 gid_type = listen_id_priv->gid_type;
842 sgid_attr = cma_validate_port(cma_dev->device, port,
41ab1cb7 843 gid_type, &gid, id_priv);
ff11c6cd
PP		 844 if (!IS_ERR(sgid_attr)) {
845 id_priv->id.port_num = port;
846 cma_bind_sgid_attr(id_priv, sgid_attr);
847 ret = 0;
848 goto out;
be9130cc 849 }
7c11147d 850
e51060f0 851 list_for_each_entry(cma_dev, &dev_list, list) {
cc055dd3 852 rdma_for_each_port (cma_dev->device, port) {
ff11c6cd 853 if (listen_id_priv->cma_dev == cma_dev &&
be9130cc
DL		 854 listen_id_priv->id.port_num == port)
855 continue;
7c11147d 856
79d684f0 857 gid_type = cma_dev->default_gid_type[port - 1];
4ed13a5f 858 sgid_attr = cma_validate_port(cma_dev->device, port,
41ab1cb7 859 gid_type, &gid, id_priv);
4ed13a5f 860 if (!IS_ERR(sgid_attr)) {
7c11147d 861 id_priv->id.port_num = port;
4ed13a5f
PP		 862 cma_bind_sgid_attr(id_priv, sgid_attr);
863 ret = 0;
7c11147d 864 goto out;
3c86aa70 865 }
e51060f0
SH		 866 }
867 }
3c86aa70
EC		 868
869out:
cb5cd0ea 870 if (!ret) {
3c86aa70 871 cma_attach_to_dev(id_priv, cma_dev);
cb5cd0ea
SD		 872 rdma_restrack_add(&id_priv->res);
873 }
3c86aa70 874
a396d43a 875 mutex_unlock(&lock);
e51060f0
SH		 876 return ret;
877}
878
f17df3b0
SH		 879/*
880 * Select the source IB device and address to reach the destination IB address.
881 */
882static int cma_resolve_ib_dev(struct rdma_id_private *id_priv)
883{
884 struct cma_device *cma_dev, *cur_dev;
885 struct sockaddr_ib *addr;
886 union ib_gid gid, sgid, *dgid;
cc055dd3 887 unsigned int p;
f17df3b0 888 u16 pkey, index;
93b1f29d 889 enum ib_port_state port_state;
20679094 890 int ret;
f17df3b0
SH		 891 int i;
892
893 cma_dev = NULL;
894 addr = (struct sockaddr_ib *) cma_dst_addr(id_priv);
895 dgid = (union ib_gid *) &addr->sib_addr;
896 pkey = ntohs(addr->sib_pkey);
897
954a8e3a 898 mutex_lock(&lock);
f17df3b0 899 list_for_each_entry(cur_dev, &dev_list, list) {
cc055dd3 900 rdma_for_each_port (cur_dev->device, p) {
30a74ef4 901 if (!rdma_cap_af_ib(cur_dev->device, p))
fef60902
MW		 902 continue;
903
f17df3b0
SH		 904 if (ib_find_cached_pkey(cur_dev->device, p, pkey, &index))
905 continue;
906
93b1f29d
JW		 907 if (ib_get_cached_port_state(cur_dev->device, p, &port_state))
908 continue;
20679094
AH		 909
910 for (i = 0; i < cur_dev->device->port_data[p].immutable.gid_tbl_len;
911 ++i) {
912 ret = rdma_query_gid(cur_dev->device, p, i,
913 &gid);
914 if (ret)
915 continue;
916
f17df3b0
SH		 917 if (!memcmp(&gid, dgid, sizeof(gid))) {
918 cma_dev = cur_dev;
919 sgid = gid;
8fb488d7 920 id_priv->id.port_num = p;
f17df3b0
SH		 921 goto found;
922 }
923
924 if (!cma_dev && (gid.global.subnet_prefix ==
93b1f29d
JW		 925 dgid->global.subnet_prefix) &&
926 port_state == IB_PORT_ACTIVE) {
f17df3b0
SH		 927 cma_dev = cur_dev;
928 sgid = gid;
8fb488d7 929 id_priv->id.port_num = p;
954a8e3a 930 goto found;
f17df3b0
SH		 931 }
932 }
933 }
934 }
954a8e3a
PP		 935 mutex_unlock(&lock);
936 return -ENODEV;
f17df3b0
SH		 937
938found:
939 cma_attach_to_dev(id_priv, cma_dev);
cb5cd0ea 940 rdma_restrack_add(&id_priv->res);
954a8e3a
PP		 941 mutex_unlock(&lock);
942 addr = (struct sockaddr_ib *)cma_src_addr(id_priv);
943 memcpy(&addr->sib_addr, &sgid, sizeof(sgid));
f17df3b0
SH		 944 cma_translate_ib(addr, &id_priv->id.route.addr.dev_addr);
945 return 0;
946}
947
e368d23f
PP		 948static void cma_id_get(struct rdma_id_private *id_priv)
949{
43fb5892 950 refcount_inc(&id_priv->refcount);
e368d23f
PP		 951}
952
953static void cma_id_put(struct rdma_id_private *id_priv)
e51060f0 954{
43fb5892 955 if (refcount_dec_and_test(&id_priv->refcount))
e51060f0
SH		 956 complete(&id_priv->comp);
957}
958
b09c4d70
LR		 959static struct rdma_id_private *
960__rdma_create_id(struct net *net, rdma_cm_event_handler event_handler,
961 void *context, enum rdma_ucm_port_space ps,
962 enum ib_qp_type qp_type, const struct rdma_id_private *parent)
e51060f0
SH		 963{
964 struct rdma_id_private *id_priv;
965
966 id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
967 if (!id_priv)
968 return ERR_PTR(-ENOMEM);
969
550e5ca7 970 id_priv->state = RDMA_CM_IDLE;
e51060f0
SH		 971 id_priv->id.context = context;
972 id_priv->id.event_handler = event_handler;
973 id_priv->id.ps = ps;
b26f9b99 974 id_priv->id.qp_type = qp_type;
89052d78 975 id_priv->tos_set = false;
2c1619ed 976 id_priv->timeout_set = false;
3aeffc46 977 id_priv->min_rnr_timer_set = false;
79d684f0 978 id_priv->gid_type = IB_GID_TYPE_IB;
e51060f0 979 spin_lock_init(&id_priv->lock);
c5483388 980 mutex_init(&id_priv->qp_mutex);
e51060f0 981 init_completion(&id_priv->comp);
43fb5892 982 refcount_set(&id_priv->refcount, 1);
de910bd9 983 mutex_init(&id_priv->handler_mutex);
99cfddb8 984 INIT_LIST_HEAD(&id_priv->device_item);
fc008bdb 985 INIT_LIST_HEAD(&id_priv->id_list_entry);
e51060f0 986 INIT_LIST_HEAD(&id_priv->listen_list);
c8f6a362 987 INIT_LIST_HEAD(&id_priv->mc_list);
e51060f0 988 get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
fa20105e 989 id_priv->id.route.addr.dev_addr.net = get_net(net);
23a9cd2a 990 id_priv->seq_num &= 0x00ffffff;
e51060f0 991
13ef5539 992 rdma_restrack_new(&id_priv->res, RDMA_RESTRACK_CM_ID);
b09c4d70
LR		 993 if (parent)
994 rdma_restrack_parent_name(&id_priv->res, &parent->res);
13ef5539 995
b09c4d70
LR		 996 return id_priv;
997}
998
999struct rdma_cm_id *
1000__rdma_create_kernel_id(struct net *net, rdma_cm_event_handler event_handler,
1001 void *context, enum rdma_ucm_port_space ps,
1002 enum ib_qp_type qp_type, const char *caller)
1003{
1004 struct rdma_id_private *ret;
1005
1006 ret = __rdma_create_id(net, event_handler, context, ps, qp_type, NULL);
1007 if (IS_ERR(ret))
1008 return ERR_CAST(ret);
1009
1010 rdma_restrack_set_name(&ret->res, caller);
1011 return &ret->id;
e51060f0 1012}
b09c4d70
LR		 1013EXPORT_SYMBOL(__rdma_create_kernel_id);
1014
1015struct rdma_cm_id *rdma_create_user_id(rdma_cm_event_handler event_handler,
1016 void *context,
1017 enum rdma_ucm_port_space ps,
1018 enum ib_qp_type qp_type)
1019{
1020 struct rdma_id_private *ret;
1021
1022 ret = __rdma_create_id(current->nsproxy->net_ns, event_handler, context,
1023 ps, qp_type, NULL);
1024 if (IS_ERR(ret))
1025 return ERR_CAST(ret);
1026
1027 rdma_restrack_set_name(&ret->res, NULL);
1028 return &ret->id;
e51060f0 1029}
b09c4d70 1030EXPORT_SYMBOL(rdma_create_user_id);
e51060f0 1031
c8f6a362 1032static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
e51060f0
SH		 1033{
1034 struct ib_qp_attr qp_attr;
c8f6a362 1035 int qp_attr_mask, ret;
e51060f0 1036
c8f6a362
SH		 1037 qp_attr.qp_state = IB_QPS_INIT;
1038 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0
SH		 1039 if (ret)
1040 return ret;
1041
c8f6a362
SH		 1042 ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
1043 if (ret)
1044 return ret;
1045
1046 qp_attr.qp_state = IB_QPS_RTR;
1047 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
1048 if (ret)
1049 return ret;
1050
1051 qp_attr.qp_state = IB_QPS_RTS;
1052 qp_attr.sq_psn = 0;
1053 ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
1054
1055 return ret;
e51060f0
SH		 1056}
1057
db4657af
MM		 1058static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
1059{
1060 struct ib_qp_attr qp_attr;
1061 int qp_attr_mask, ret;
1062
1063 qp_attr.qp_state = IB_QPS_INIT;
1064 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
1065 if (ret)
1066 return ret;
1067
1068 return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
1069}
1070
e51060f0
SH		 1071int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
1072 struct ib_qp_init_attr *qp_init_attr)
1073{
1074 struct rdma_id_private *id_priv;
1075 struct ib_qp *qp;
db4657af 1076 int ret;
e51060f0
SH		 1077
1078 id_priv = container_of(id, struct rdma_id_private, id);
ed999f82
CL		 1079 if (id->device != pd->device) {
1080 ret = -EINVAL;
1081 goto out_err;
1082 }
e51060f0 1083
0691a286 1084 qp_init_attr->port_num = id->port_num;
e51060f0 1085 qp = ib_create_qp(pd, qp_init_attr);
ed999f82
CL		 1086 if (IS_ERR(qp)) {
1087 ret = PTR_ERR(qp);
1088 goto out_err;
1089 }
e51060f0 1090
b26f9b99 1091 if (id->qp_type == IB_QPT_UD)
c8f6a362 1092 ret = cma_init_ud_qp(id_priv, qp);
db4657af
MM		 1093 else
1094 ret = cma_init_conn_qp(id_priv, qp);
e51060f0 1095 if (ret)
ed999f82 1096 goto out_destroy;
e51060f0
SH		 1097
1098 id->qp = qp;
1099 id_priv->qp_num = qp->qp_num;
e51060f0 1100 id_priv->srq = (qp->srq != NULL);
ed999f82 1101 trace_cm_qp_create(id_priv, pd, qp_init_attr, 0);
e51060f0 1102 return 0;
ed999f82 1103out_destroy:
e51060f0 1104 ib_destroy_qp(qp);
ed999f82
CL		 1105out_err:
1106 trace_cm_qp_create(id_priv, pd, qp_init_attr, ret);
e51060f0
SH		 1107 return ret;
1108}
1109EXPORT_SYMBOL(rdma_create_qp);
1110
1111void rdma_destroy_qp(struct rdma_cm_id *id)
1112{
c5483388
SH		 1113 struct rdma_id_private *id_priv;
1114
1115 id_priv = container_of(id, struct rdma_id_private, id);
ed999f82 1116 trace_cm_qp_destroy(id_priv);
c5483388
SH		 1117 mutex_lock(&id_priv->qp_mutex);
1118 ib_destroy_qp(id_priv->id.qp);
1119 id_priv->id.qp = NULL;
1120 mutex_unlock(&id_priv->qp_mutex);
e51060f0
SH		 1121}
1122EXPORT_SYMBOL(rdma_destroy_qp);
1123
5851bb89
SH		 1124static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
1125 struct rdma_conn_param *conn_param)
e51060f0
SH		 1126{
1127 struct ib_qp_attr qp_attr;
1128 int qp_attr_mask, ret;
1129
c5483388
SH		 1130 mutex_lock(&id_priv->qp_mutex);
1131 if (!id_priv->id.qp) {
1132 ret = 0;
1133 goto out;
1134 }
e51060f0
SH		 1135
1136 /* Need to update QP attributes from default values. */
1137 qp_attr.qp_state = IB_QPS_INIT;
c5483388 1138 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 1139 if (ret)
c5483388 1140 goto out;
e51060f0 1141
c5483388 1142 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
e51060f0 1143 if (ret)
c5483388 1144 goto out;
e51060f0
SH		 1145
1146 qp_attr.qp_state = IB_QPS_RTR;
c5483388 1147 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 1148 if (ret)
c5483388 1149 goto out;
e51060f0 1150
fef60902
MW		 1151 BUG_ON(id_priv->cma_dev->device != id_priv->id.device);
1152
5851bb89
SH		 1153 if (conn_param)
1154 qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
c5483388
SH		 1155 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1156out:
1157 mutex_unlock(&id_priv->qp_mutex);
1158 return ret;
e51060f0
SH		 1159}
1160
5851bb89
SH		 1161static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
1162 struct rdma_conn_param *conn_param)
e51060f0
SH		 1163{
1164 struct ib_qp_attr qp_attr;
1165 int qp_attr_mask, ret;
1166
c5483388
SH		 1167 mutex_lock(&id_priv->qp_mutex);
1168 if (!id_priv->id.qp) {
1169 ret = 0;
1170 goto out;
1171 }
e51060f0
SH		 1172
1173 qp_attr.qp_state = IB_QPS_RTS;
c5483388 1174 ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
e51060f0 1175 if (ret)
c5483388 1176 goto out;
e51060f0 1177
5851bb89
SH		 1178 if (conn_param)
1179 qp_attr.max_rd_atomic = conn_param->initiator_depth;
c5483388
SH		 1180 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
1181out:
1182 mutex_unlock(&id_priv->qp_mutex);
1183 return ret;
e51060f0
SH		 1184}
1185
c5483388 1186static int cma_modify_qp_err(struct rdma_id_private *id_priv)
e51060f0
SH		 1187{
1188 struct ib_qp_attr qp_attr;
c5483388 1189 int ret;
e51060f0 1190
c5483388
SH		 1191 mutex_lock(&id_priv->qp_mutex);
1192 if (!id_priv->id.qp) {
1193 ret = 0;
1194 goto out;
1195 }
e51060f0
SH		 1196
1197 qp_attr.qp_state = IB_QPS_ERR;
c5483388
SH		 1198 ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
1199out:
1200 mutex_unlock(&id_priv->qp_mutex);
1201 return ret;
e51060f0
SH		 1202}
1203
c8f6a362
SH		 1204static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
1205 struct ib_qp_attr *qp_attr, int *qp_attr_mask)
1206{
1207 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
1208 int ret;
3c86aa70
EC		 1209 u16 pkey;
1210
227128fc 1211 if (rdma_cap_eth_ah(id_priv->id.device, id_priv->id.port_num))
3c86aa70 1212 pkey = 0xffff;
fef60902
MW		 1213 else
1214 pkey = ib_addr_get_pkey(dev_addr);
c8f6a362
SH		 1215
1216 ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
3c86aa70 1217 pkey, &qp_attr->pkey_index);
c8f6a362
SH		 1218 if (ret)
1219 return ret;
1220
1221 qp_attr->port_num = id_priv->id.port_num;
1222 *qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
1223
b26f9b99 1224 if (id_priv->id.qp_type == IB_QPT_UD) {
5c438135 1225 ret = cma_set_qkey(id_priv, 0);
d2ca39f2
YE		 1226 if (ret)
1227 return ret;
1228
c8f6a362
SH		 1229 qp_attr->qkey = id_priv->qkey;
1230 *qp_attr_mask |= IB_QP_QKEY;
1231 } else {
1232 qp_attr->qp_access_flags = 0;
1233 *qp_attr_mask |= IB_QP_ACCESS_FLAGS;
1234 }
1235 return 0;
1236}
1237
e51060f0
SH		 1238int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
1239 int *qp_attr_mask)
1240{
1241 struct rdma_id_private *id_priv;
c8f6a362 1242 int ret = 0;
e51060f0
SH		 1243
1244 id_priv = container_of(id, struct rdma_id_private, id);
72219cea 1245 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 1246 if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
c8f6a362
SH		 1247 ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
1248 else
1249 ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
1250 qp_attr_mask);
dd5f03be 1251
e51060f0
SH		 1252 if (qp_attr->qp_state == IB_QPS_RTR)
1253 qp_attr->rq_psn = id_priv->seq_num;
04215330 1254 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
c8f6a362 1255 if (!id_priv->cm_id.iw) {
8f076531 1256 qp_attr->qp_access_flags = 0;
c8f6a362
SH		 1257 *qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
1258 } else
1259 ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
1260 qp_attr_mask);
a62ab66b
IM		 1261 qp_attr->port_num = id_priv->id.port_num;
1262 *qp_attr_mask |= IB_QP_PORT;
b6eb7011 1263 } else {
e51060f0 1264 ret = -ENOSYS;
b6eb7011 1265 }
e51060f0 1266
2c1619ed
DG		 1267 if ((*qp_attr_mask & IB_QP_TIMEOUT) && id_priv->timeout_set)
1268 qp_attr->timeout = id_priv->timeout;
1269
3aeffc46
HB		 1270 if ((*qp_attr_mask & IB_QP_MIN_RNR_TIMER) && id_priv->min_rnr_timer_set)
1271 qp_attr->min_rnr_timer = id_priv->min_rnr_timer;
1272
e51060f0
SH		 1273 return ret;
1274}
1275EXPORT_SYMBOL(rdma_init_qp_attr);
1276
ca3a8ace 1277static inline bool cma_zero_addr(const struct sockaddr *addr)
e51060f0 1278{
2e2d190c
SH		 1279 switch (addr->sa_family) {
1280 case AF_INET:
1281 return ipv4_is_zeronet(((struct sockaddr_in *)addr)->sin_addr.s_addr);
1282 case AF_INET6:
ca3a8ace 1283 return ipv6_addr_any(&((struct sockaddr_in6 *)addr)->sin6_addr);
2e2d190c 1284 case AF_IB:
ca3a8ace 1285 return ib_addr_any(&((struct sockaddr_ib *)addr)->sib_addr);
2e2d190c 1286 default:
ca3a8ace 1287 return false;
e51060f0
SH		 1288 }
1289}
1290
ca3a8ace 1291static inline bool cma_loopback_addr(const struct sockaddr *addr)
e51060f0 1292{
2e2d190c
SH		 1293 switch (addr->sa_family) {
1294 case AF_INET:
ca3a8ace
PP		 1295 return ipv4_is_loopback(
1296 ((struct sockaddr_in *)addr)->sin_addr.s_addr);
2e2d190c 1297 case AF_INET6:
ca3a8ace
PP		 1298 return ipv6_addr_loopback(
1299 &((struct sockaddr_in6 *)addr)->sin6_addr);
2e2d190c 1300 case AF_IB:
ca3a8ace
PP		 1301 return ib_addr_loopback(
1302 &((struct sockaddr_ib *)addr)->sib_addr);
2e2d190c 1303 default:
ca3a8ace 1304 return false;
2e2d190c 1305 }
e51060f0
SH		 1306}
1307
ca3a8ace 1308static inline bool cma_any_addr(const struct sockaddr *addr)
e51060f0
SH		 1309{
1310 return cma_zero_addr(addr) || cma_loopback_addr(addr);
1311}
1312
5d7ed2f2 1313static int cma_addr_cmp(const struct sockaddr *src, const struct sockaddr *dst)
43b752da
HS		 1314{
1315 if (src->sa_family != dst->sa_family)
1316 return -1;
1317
1318 switch (src->sa_family) {
1319 case AF_INET:
5d7ed2f2
PP		 1320 return ((struct sockaddr_in *)src)->sin_addr.s_addr !=
1321 ((struct sockaddr_in *)dst)->sin_addr.s_addr;
1322 case AF_INET6: {
1323 struct sockaddr_in6 *src_addr6 = (struct sockaddr_in6 *)src;
1324 struct sockaddr_in6 *dst_addr6 = (struct sockaddr_in6 *)dst;
1325 bool link_local;
1326
1327 if (ipv6_addr_cmp(&src_addr6->sin6_addr,
1328 &dst_addr6->sin6_addr))
1329 return 1;
1330 link_local = ipv6_addr_type(&dst_addr6->sin6_addr) &
1331 IPV6_ADDR_LINKLOCAL;
1332 /* Link local must match their scope_ids */
1333 return link_local ? (src_addr6->sin6_scope_id !=
1334 dst_addr6->sin6_scope_id) :
1335 0;
1336 }
1337
2e2d190c
SH		 1338 default:
1339 return ib_addr_cmp(&((struct sockaddr_ib *) src)->sib_addr,
1340 &((struct sockaddr_ib *) dst)->sib_addr);
43b752da
HS		 1341 }
1342}
1343
2df7dba8 1344static __be16 cma_port(const struct sockaddr *addr)
628e5f6d 1345{
58afdcb7
SH		 1346 struct sockaddr_ib *sib;
1347
1348 switch (addr->sa_family) {
1349 case AF_INET:
628e5f6d 1350 return ((struct sockaddr_in *) addr)->sin_port;
58afdcb7 1351 case AF_INET6:
628e5f6d 1352 return ((struct sockaddr_in6 *) addr)->sin6_port;
58afdcb7
SH		 1353 case AF_IB:
1354 sib = (struct sockaddr_ib *) addr;
1355 return htons((u16) (be64_to_cpu(sib->sib_sid) &
1356 be64_to_cpu(sib->sib_sid_mask)));
1357 default:
1358 return 0;
1359 }
628e5f6d
SH		 1360}
1361
2df7dba8 1362static inline int cma_any_port(const struct sockaddr *addr)
e51060f0 1363{
628e5f6d 1364 return !cma_port(addr);
e51060f0
SH		 1365}
1366
0c505f70
HE		 1367static void cma_save_ib_info(struct sockaddr *src_addr,
1368 struct sockaddr *dst_addr,
e7ff98ae
PP		 1369 const struct rdma_cm_id *listen_id,
1370 const struct sa_path_rec *path)
e51060f0 1371{
fbaa1a6d
SH		 1372 struct sockaddr_ib *listen_ib, *ib;
1373
1374 listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr;
0c505f70
HE		 1375 if (src_addr) {
1376 ib = (struct sockaddr_ib *)src_addr;
1377 ib->sib_family = AF_IB;
1378 if (path) {
1379 ib->sib_pkey = path->pkey;
1380 ib->sib_flowinfo = path->flow_label;
1381 memcpy(&ib->sib_addr, &path->sgid, 16);
d3957b86 1382 ib->sib_sid = path->service_id;
0c505f70
HE		 1383 ib->sib_scope_id = 0;
1384 } else {
1385 ib->sib_pkey = listen_ib->sib_pkey;
1386 ib->sib_flowinfo = listen_ib->sib_flowinfo;
1387 ib->sib_addr = listen_ib->sib_addr;
1388 ib->sib_sid = listen_ib->sib_sid;
1389 ib->sib_scope_id = listen_ib->sib_scope_id;
1390 }
1391 ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL);
c07678bb 1392 }
0c505f70
HE		 1393 if (dst_addr) {
1394 ib = (struct sockaddr_ib *)dst_addr;
1395 ib->sib_family = AF_IB;
1396 if (path) {
1397 ib->sib_pkey = path->pkey;
1398 ib->sib_flowinfo = path->flow_label;
1399 memcpy(&ib->sib_addr, &path->dgid, 16);
1400 }
c07678bb 1401 }
fbaa1a6d 1402}
e51060f0 1403
c50e90d0
AB		 1404static void cma_save_ip4_info(struct sockaddr_in *src_addr,
1405 struct sockaddr_in *dst_addr,
0c505f70
HE		 1406 struct cma_hdr *hdr,
1407 __be16 local_port)
fbaa1a6d 1408{
0c505f70 1409 if (src_addr) {
c50e90d0
AB		 1410 *src_addr = (struct sockaddr_in) {
1411 .sin_family = AF_INET,
1412 .sin_addr.s_addr = hdr->dst_addr.ip4.addr,
1413 .sin_port = local_port,
1414 };
0c505f70 1415 }
fbaa1a6d 1416
0c505f70 1417 if (dst_addr) {
c50e90d0
AB		 1418 *dst_addr = (struct sockaddr_in) {
1419 .sin_family = AF_INET,
1420 .sin_addr.s_addr = hdr->src_addr.ip4.addr,
1421 .sin_port = hdr->port,
1422 };
0c505f70 1423 }
e51060f0
SH		 1424}
1425
c50e90d0
AB		 1426static void cma_save_ip6_info(struct sockaddr_in6 *src_addr,
1427 struct sockaddr_in6 *dst_addr,
0c505f70
HE		 1428 struct cma_hdr *hdr,
1429 __be16 local_port)
e51060f0 1430{
0c505f70 1431 if (src_addr) {
c50e90d0
AB		 1432 *src_addr = (struct sockaddr_in6) {
1433 .sin6_family = AF_INET6,
1434 .sin6_addr = hdr->dst_addr.ip6,
1435 .sin6_port = local_port,
1436 };
0c505f70 1437 }
fbaa1a6d 1438
0c505f70 1439 if (dst_addr) {
c50e90d0
AB		 1440 *dst_addr = (struct sockaddr_in6) {
1441 .sin6_family = AF_INET6,
1442 .sin6_addr = hdr->src_addr.ip6,
1443 .sin6_port = hdr->port,
1444 };
0c505f70 1445 }
fbaa1a6d
SH		 1446}
1447
0c505f70 1448static u16 cma_port_from_service_id(__be64 service_id)
fbaa1a6d 1449{
0c505f70
HE		 1450 return (u16)be64_to_cpu(service_id);
1451}
fbaa1a6d 1452
0c505f70
HE		 1453static int cma_save_ip_info(struct sockaddr *src_addr,
1454 struct sockaddr *dst_addr,
e7ff98ae 1455 const struct ib_cm_event *ib_event,
0c505f70
HE		 1456 __be64 service_id)
1457{
1458 struct cma_hdr *hdr;
1459 __be16 port;
fbaa1a6d
SH		 1460
1461 hdr = ib_event->private_data;
1462 if (hdr->cma_version != CMA_VERSION)
1463 return -EINVAL;
1464
0c505f70
HE		 1465 port = htons(cma_port_from_service_id(service_id));
1466
fbaa1a6d 1467 switch (cma_get_ip_ver(hdr)) {
e51060f0 1468 case 4:
c50e90d0
AB		 1469 cma_save_ip4_info((struct sockaddr_in *)src_addr,
1470 (struct sockaddr_in *)dst_addr, hdr, port);
e51060f0
SH		 1471 break;
1472 case 6:
c50e90d0
AB		 1473 cma_save_ip6_info((struct sockaddr_in6 *)src_addr,
1474 (struct sockaddr_in6 *)dst_addr, hdr, port);
e51060f0
SH		 1475 break;
1476 default:
4c21b5bc 1477 return -EAFNOSUPPORT;
e51060f0 1478 }
0c505f70 1479
fbaa1a6d 1480 return 0;
e51060f0
SH		 1481}
1482
0c505f70
HE		 1483static int cma_save_net_info(struct sockaddr *src_addr,
1484 struct sockaddr *dst_addr,
e7ff98ae
PP		 1485 const struct rdma_cm_id *listen_id,
1486 const struct ib_cm_event *ib_event,
0c505f70
HE		 1487 sa_family_t sa_family, __be64 service_id)
1488{
1489 if (sa_family == AF_IB) {
1490 if (ib_event->event == IB_CM_REQ_RECEIVED)
1491 cma_save_ib_info(src_addr, dst_addr, listen_id,
1492 ib_event->param.req_rcvd.primary_path);
1493 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1494 cma_save_ib_info(src_addr, dst_addr, listen_id, NULL);
1495 return 0;
1496 }
1497
1498 return cma_save_ip_info(src_addr, dst_addr, ib_event, service_id);
1499}
1500
4c21b5bc
HE		 1501static int cma_save_req_info(const struct ib_cm_event *ib_event,
1502 struct cma_req_info *req)
1503{
1504 const struct ib_cm_req_event_param *req_param =
1505 &ib_event->param.req_rcvd;
1506 const struct ib_cm_sidr_req_event_param *sidr_param =
1507 &ib_event->param.sidr_req_rcvd;
1508
1509 switch (ib_event->event) {
1510 case IB_CM_REQ_RECEIVED:
1511 req->device = req_param->listen_id->device;
1512 req->port = req_param->port;
1513 memcpy(&req->local_gid, &req_param->primary_path->sgid,
1514 sizeof(req->local_gid));
1515 req->has_gid = true;
d3957b86 1516 req->service_id = req_param->primary_path->service_id;
ab3964ad 1517 req->pkey = be16_to_cpu(req_param->primary_path->pkey);
84424a7f
HE		 1518 if (req->pkey != req_param->bth_pkey)
1519 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and primary path P_Key (0x%x)\n"
1520 "RDMA CMA: in the future this may cause the request to be dropped\n",
1521 req_param->bth_pkey, req->pkey);
4c21b5bc
HE		 1522 break;
1523 case IB_CM_SIDR_REQ_RECEIVED:
1524 req->device = sidr_param->listen_id->device;
1525 req->port = sidr_param->port;
1526 req->has_gid = false;
1527 req->service_id = sidr_param->service_id;
ab3964ad 1528 req->pkey = sidr_param->pkey;
84424a7f
HE		 1529 if (req->pkey != sidr_param->bth_pkey)
1530 pr_warn_ratelimited("RDMA CMA: got different BTH P_Key (0x%x) and SIDR request payload P_Key (0x%x)\n"
1531 "RDMA CMA: in the future this may cause the request to be dropped\n",
1532 sidr_param->bth_pkey, req->pkey);
4c21b5bc
HE		 1533 break;
1534 default:
1535 return -EINVAL;
1536 }
1537
1538 return 0;
1539}
1540
f887f2ac
HE		 1541static bool validate_ipv4_net_dev(struct net_device *net_dev,
1542 const struct sockaddr_in *dst_addr,
1543 const struct sockaddr_in *src_addr)
1544{
1545 __be32 daddr = dst_addr->sin_addr.s_addr,
1546 saddr = src_addr->sin_addr.s_addr;
1547 struct fib_result res;
1548 struct flowi4 fl4;
1549 int err;
1550 bool ret;
1551
1552 if (ipv4_is_multicast(saddr) || ipv4_is_lbcast(saddr) ||
1553 ipv4_is_lbcast(daddr) || ipv4_is_zeronet(saddr) ||
1554 ipv4_is_zeronet(daddr) || ipv4_is_loopback(daddr) ||
1555 ipv4_is_loopback(saddr))
1556 return false;
1557
1558 memset(&fl4, 0, sizeof(fl4));
eb83f502 1559 fl4.flowi4_oif = net_dev->ifindex;
f887f2ac
HE		 1560 fl4.daddr = daddr;
1561 fl4.saddr = saddr;
1562
1563 rcu_read_lock();
1564 err = fib_lookup(dev_net(net_dev), &fl4, &res, 0);
d3632493 1565 ret = err == 0 && FIB_RES_DEV(res) == net_dev;
f887f2ac
HE		 1566 rcu_read_unlock();
1567
1568 return ret;
1569}
1570
1571static bool validate_ipv6_net_dev(struct net_device *net_dev,
1572 const struct sockaddr_in6 *dst_addr,
1573 const struct sockaddr_in6 *src_addr)
1574{
1575#if IS_ENABLED(CONFIG_IPV6)
1576 const int strict = ipv6_addr_type(&dst_addr->sin6_addr) &
1577 IPV6_ADDR_LINKLOCAL;
1578 struct rt6_info *rt = rt6_lookup(dev_net(net_dev), &dst_addr->sin6_addr,
1579 &src_addr->sin6_addr, net_dev->ifindex,
b75cc8f9 1580 NULL, strict);
f887f2ac
HE		 1581 bool ret;
1582
1583 if (!rt)
1584 return false;
1585
1586 ret = rt->rt6i_idev->dev == net_dev;
1587 ip6_rt_put(rt);
1588
1589 return ret;
1590#else
1591 return false;
1592#endif
1593}
1594
1595static bool validate_net_dev(struct net_device *net_dev,
1596 const struct sockaddr *daddr,
1597 const struct sockaddr *saddr)
1598{
1599 const struct sockaddr_in *daddr4 = (const struct sockaddr_in *)daddr;
1600 const struct sockaddr_in *saddr4 = (const struct sockaddr_in *)saddr;
1601 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1602 const struct sockaddr_in6 *saddr6 = (const struct sockaddr_in6 *)saddr;
1603
1604 switch (daddr->sa_family) {
1605 case AF_INET:
1606 return saddr->sa_family == AF_INET &&
1607 validate_ipv4_net_dev(net_dev, daddr4, saddr4);
1608
1609 case AF_INET6:
1610 return saddr->sa_family == AF_INET6 &&
1611 validate_ipv6_net_dev(net_dev, daddr6, saddr6);
1612
1613 default:
1614 return false;
1615 }
1616}
1617
cee10433
PP		 1618static struct net_device *
1619roce_get_net_dev_by_cm_event(const struct ib_cm_event *ib_event)
1620{
1621 const struct ib_gid_attr *sgid_attr = NULL;
adb4a57a 1622 struct net_device *ndev;
cee10433
PP		 1623
1624 if (ib_event->event == IB_CM_REQ_RECEIVED)
1625 sgid_attr = ib_event->param.req_rcvd.ppath_sgid_attr;
1626 else if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED)
1627 sgid_attr = ib_event->param.sidr_req_rcvd.sgid_attr;
1628
1629 if (!sgid_attr)
1630 return NULL;
adb4a57a
PP		 1631
1632 rcu_read_lock();
1633 ndev = rdma_read_gid_attr_ndev_rcu(sgid_attr);
1634 if (IS_ERR(ndev))
1635 ndev = NULL;
1636 else
1637 dev_hold(ndev);
1638 rcu_read_unlock();
1639 return ndev;
cee10433
PP		 1640}
1641
e7ff98ae 1642static struct net_device *cma_get_net_dev(const struct ib_cm_event *ib_event,
2918c1a9 1643 struct cma_req_info *req)
4c21b5bc 1644{
2918c1a9
PP		 1645 struct sockaddr *listen_addr =
1646 (struct sockaddr *)&req->listen_addr_storage;
1647 struct sockaddr *src_addr = (struct sockaddr *)&req->src_addr_storage;
4c21b5bc
HE		 1648 struct net_device *net_dev;
1649 const union ib_gid *gid = req->has_gid ? &req->local_gid : NULL;
1650 int err;
1651
f887f2ac
HE		 1652 err = cma_save_ip_info(listen_addr, src_addr, ib_event,
1653 req->service_id);
4c21b5bc
HE		 1654 if (err)
1655 return ERR_PTR(err);
1656
cee10433
PP		 1657 if (rdma_protocol_roce(req->device, req->port))
1658 net_dev = roce_get_net_dev_by_cm_event(ib_event);
1659 else
1660 net_dev = ib_get_net_dev_by_params(req->device, req->port,
1661 req->pkey,
1662 gid, listen_addr);
4c21b5bc
HE		 1663 if (!net_dev)
1664 return ERR_PTR(-ENODEV);
1665
1666 return net_dev;
1667}
1668
2253fc0c 1669static enum rdma_ucm_port_space rdma_ps_from_service_id(__be64 service_id)
4c21b5bc
HE		 1670{
1671 return (be64_to_cpu(service_id) >> 16) & 0xffff;
1672}
1673
1674static bool cma_match_private_data(struct rdma_id_private *id_priv,
1675 const struct cma_hdr *hdr)
1676{
1677 struct sockaddr *addr = cma_src_addr(id_priv);
1678 __be32 ip4_addr;
1679 struct in6_addr ip6_addr;
1680
1681 if (cma_any_addr(addr) && !id_priv->afonly)
1682 return true;
1683
1684 switch (addr->sa_family) {
1685 case AF_INET:
1686 ip4_addr = ((struct sockaddr_in *)addr)->sin_addr.s_addr;
1687 if (cma_get_ip_ver(hdr) != 4)
1688 return false;
1689 if (!cma_any_addr(addr) &&
1690 hdr->dst_addr.ip4.addr != ip4_addr)
1691 return false;
1692 break;
1693 case AF_INET6:
1694 ip6_addr = ((struct sockaddr_in6 *)addr)->sin6_addr;
1695 if (cma_get_ip_ver(hdr) != 6)
1696 return false;
1697 if (!cma_any_addr(addr) &&
1698 memcmp(&hdr->dst_addr.ip6, &ip6_addr, sizeof(ip6_addr)))
1699 return false;
1700 break;
1701 case AF_IB:
1702 return true;
1703 default:
1704 return false;
1705 }
1706
1707 return true;
1708}
1709
b8cab5da
HE		 1710static bool cma_protocol_roce(const struct rdma_cm_id *id)
1711{
1712 struct ib_device *device = id->device;
1fb7f897 1713 const u32 port_num = id->port_num ?: rdma_start_port(device);
b8cab5da 1714
5ac08a34 1715 return rdma_protocol_roce(device, port_num);
b8cab5da
HE		 1716}
1717
78fb282b
PP		 1718static bool cma_is_req_ipv6_ll(const struct cma_req_info *req)
1719{
1720 const struct sockaddr *daddr =
1721 (const struct sockaddr *)&req->listen_addr_storage;
1722 const struct sockaddr_in6 *daddr6 = (const struct sockaddr_in6 *)daddr;
1723
1724 /* Returns true if the req is for IPv6 link local */
1725 return (daddr->sa_family == AF_INET6 &&
1726 (ipv6_addr_type(&daddr6->sin6_addr) & IPV6_ADDR_LINKLOCAL));
1727}
1728
fac51590
MB		 1729static bool cma_match_net_dev(const struct rdma_cm_id *id,
1730 const struct net_device *net_dev,
78fb282b 1731 const struct cma_req_info *req)
4c21b5bc 1732{
fac51590 1733 const struct rdma_addr *addr = &id->route.addr;
4c21b5bc
HE		 1734
1735 if (!net_dev)
d274e45c 1736 /* This request is an AF_IB request */
78fb282b 1737 return (!id->port_num || id->port_num == req->port) &&
d274e45c 1738 (addr->src_addr.ss_family == AF_IB);
4c21b5bc 1739
78fb282b
PP		 1740 /*
1741 * If the request is not for IPv6 link local, allow matching
1742 * request to any netdevice of the one or multiport rdma device.
1743 */
1744 if (!cma_is_req_ipv6_ll(req))
1745 return true;
643d213a
PP		 1746 /*
1747 * Net namespaces must match, and if the listner is listening
1748 * on a specific netdevice than netdevice must match as well.
1749 */
1750 if (net_eq(dev_net(net_dev), addr->dev_addr.net) &&
1751 (!!addr->dev_addr.bound_dev_if ==
1752 (addr->dev_addr.bound_dev_if == net_dev->ifindex)))
1753 return true;
1754 else
1755 return false;
4c21b5bc
HE		 1756}
1757
1758static struct rdma_id_private *cma_find_listener(
1759 const struct rdma_bind_list *bind_list,
1760 const struct ib_cm_id *cm_id,
1761 const struct ib_cm_event *ib_event,
1762 const struct cma_req_info *req,
1763 const struct net_device *net_dev)
1764{
1765 struct rdma_id_private *id_priv, *id_priv_dev;
1766
730c8912
MZ		 1767 lockdep_assert_held(&lock);
1768
4c21b5bc
HE		 1769 if (!bind_list)
1770 return ERR_PTR(-EINVAL);
1771
1772 hlist_for_each_entry(id_priv, &bind_list->owners, node) {
1773 if (cma_match_private_data(id_priv, ib_event->private_data)) {
1774 if (id_priv->id.device == cm_id->device &&
78fb282b 1775 cma_match_net_dev(&id_priv->id, net_dev, req))
4c21b5bc
HE		 1776 return id_priv;
1777 list_for_each_entry(id_priv_dev,
1778 &id_priv->listen_list,
99cfddb8 1779 listen_item) {
4c21b5bc 1780 if (id_priv_dev->id.device == cm_id->device &&
78fb282b
PP		 1781 cma_match_net_dev(&id_priv_dev->id,
1782 net_dev, req))
4c21b5bc
HE		 1783 return id_priv_dev;
1784 }
1785 }
1786 }
1787
1788 return ERR_PTR(-EINVAL);
1789}
1790
e7ff98ae 1791static struct rdma_id_private *
85463316
PP		 1792cma_ib_id_from_event(struct ib_cm_id *cm_id,
1793 const struct ib_cm_event *ib_event,
41ab1cb7 1794 struct cma_req_info *req,
85463316 1795 struct net_device **net_dev)
4c21b5bc 1796{
4c21b5bc
HE		 1797 struct rdma_bind_list *bind_list;
1798 struct rdma_id_private *id_priv;
4c21b5bc
HE		 1799 int err;
1800
41ab1cb7 1801 err = cma_save_req_info(ib_event, req);
4c21b5bc
HE		 1802 if (err)
1803 return ERR_PTR(err);
1804
41ab1cb7 1805 *net_dev = cma_get_net_dev(ib_event, req);
0b3ca768
HE		 1806 if (IS_ERR(*net_dev)) {
1807 if (PTR_ERR(*net_dev) == -EAFNOSUPPORT) {
4c21b5bc 1808 /* Assuming the protocol is AF_IB */
0b3ca768 1809 *net_dev = NULL;
4c21b5bc 1810 } else {
0b3ca768 1811 return ERR_CAST(*net_dev);
4c21b5bc
HE		 1812 }
1813 }
1814
730c8912 1815 mutex_lock(&lock);
2918c1a9
PP		 1816 /*
1817 * Net namespace might be getting deleted while route lookup,
1818 * cm_id lookup is in progress. Therefore, perform netdevice
1819 * validation, cm_id lookup under rcu lock.
1820 * RCU lock along with netdevice state check, synchronizes with
1821 * netdevice migrating to different net namespace and also avoids
1822 * case where net namespace doesn't get deleted while lookup is in
1823 * progress.
1824 * If the device state is not IFF_UP, its properties such as ifindex
1825 * and nd_net cannot be trusted to remain valid without rcu lock.
1826 * net/core/dev.c change_net_namespace() ensures to synchronize with
1827 * ongoing operations on net device after device is closed using
1828 * synchronize_net().
1829 */
1830 rcu_read_lock();
1831 if (*net_dev) {
1832 /*
1833 * If netdevice is down, it is likely that it is administratively
1834 * down or it might be migrating to different namespace.
1835 * In that case avoid further processing, as the net namespace
1836 * or ifindex may change.
1837 */
1838 if (((*net_dev)->flags & IFF_UP) == 0) {
1839 id_priv = ERR_PTR(-EHOSTUNREACH);
1840 goto err;
1841 }
1842
1843 if (!validate_net_dev(*net_dev,
27cfde79
MG		 1844 (struct sockaddr *)&req->src_addr_storage,
1845 (struct sockaddr *)&req->listen_addr_storage)) {
2918c1a9
PP		 1846 id_priv = ERR_PTR(-EHOSTUNREACH);
1847 goto err;
1848 }
1849 }
1850
fa20105e 1851 bind_list = cma_ps_find(*net_dev ? dev_net(*net_dev) : &init_net,
41ab1cb7
PP		 1852 rdma_ps_from_service_id(req->service_id),
1853 cma_port_from_service_id(req->service_id));
1854 id_priv = cma_find_listener(bind_list, cm_id, ib_event, req, *net_dev);
2918c1a9
PP		 1855err:
1856 rcu_read_unlock();
730c8912 1857 mutex_unlock(&lock);
b3b51f9f 1858 if (IS_ERR(id_priv) && *net_dev) {
be688195
HE		 1859 dev_put(*net_dev);
1860 *net_dev = NULL;
1861 }
4c21b5bc
HE		 1862 return id_priv;
1863}
1864
c0b64f58 1865static inline u8 cma_user_data_offset(struct rdma_id_private *id_priv)
e51060f0 1866{
e8160e15 1867 return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr);
e51060f0
SH		 1868}
1869
e51060f0
SH		 1870static void cma_cancel_route(struct rdma_id_private *id_priv)
1871{
fe53ba2f 1872 if (rdma_cap_ib_sa(id_priv->id.device, id_priv->id.port_num)) {
e51060f0
SH		 1873 if (id_priv->query)
1874 ib_sa_cancel_query(id_priv->query_id, id_priv->query);
e51060f0
SH		 1875 }
1876}
1877
ca465e1f 1878static void _cma_cancel_listens(struct rdma_id_private *id_priv)
e51060f0
SH		 1879{
1880 struct rdma_id_private *dev_id_priv;
1881
ca465e1f
TL		 1882 lockdep_assert_held(&lock);
1883
d02d1f53
SH		 1884 /*
1885 * Remove from listen_any_list to prevent added devices from spawning
1886 * additional listen requests.
1887 */
99cfddb8 1888 list_del_init(&id_priv->listen_any_item);
e51060f0
SH		 1889
1890 while (!list_empty(&id_priv->listen_list)) {
99cfddb8
JG		 1891 dev_id_priv =
1892 list_first_entry(&id_priv->listen_list,
1893 struct rdma_id_private, listen_item);
d02d1f53 1894 /* sync with device removal to avoid duplicate destruction */
99cfddb8
JG		 1895 list_del_init(&dev_id_priv->device_item);
1896 list_del_init(&dev_id_priv->listen_item);
d02d1f53
SH		 1897 mutex_unlock(&lock);
1898
1899 rdma_destroy_id(&dev_id_priv->id);
1900 mutex_lock(&lock);
e51060f0 1901 }
ca465e1f
TL		 1902}
1903
1904static void cma_cancel_listens(struct rdma_id_private *id_priv)
1905{
1906 mutex_lock(&lock);
1907 _cma_cancel_listens(id_priv);
e51060f0
SH		 1908 mutex_unlock(&lock);
1909}
1910
1911static void cma_cancel_operation(struct rdma_id_private *id_priv,
550e5ca7 1912 enum rdma_cm_state state)
e51060f0
SH		 1913{
1914 switch (state) {
550e5ca7 1915 case RDMA_CM_ADDR_QUERY:
305d568b
JG		 1916 /*
1917 * We can avoid doing the rdma_addr_cancel() based on state,
1918 * only RDMA_CM_ADDR_QUERY has a work that could still execute.
1919 * Notice that the addr_handler work could still be exiting
1920 * outside this state, however due to the interaction with the
1921 * handler_mutex the work is guaranteed not to touch id_priv
1922 * during exit.
1923 */
e51060f0
SH		 1924 rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
1925 break;
550e5ca7 1926 case RDMA_CM_ROUTE_QUERY:
e51060f0
SH		 1927 cma_cancel_route(id_priv);
1928 break;
550e5ca7 1929 case RDMA_CM_LISTEN:
f4753834 1930 if (cma_any_addr(cma_src_addr(id_priv)) && !id_priv->cma_dev)
e51060f0
SH		 1931 cma_cancel_listens(id_priv);
1932 break;
1933 default:
1934 break;
1935 }
1936}
1937
1938static void cma_release_port(struct rdma_id_private *id_priv)
1939{
1940 struct rdma_bind_list *bind_list = id_priv->bind_list;
fa20105e 1941 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0
SH		 1942
1943 if (!bind_list)
1944 return;
1945
1946 mutex_lock(&lock);
1947 hlist_del(&id_priv->node);
1948 if (hlist_empty(&bind_list->owners)) {
fa20105e 1949 cma_ps_remove(net, bind_list->ps, bind_list->port);
e51060f0
SH		 1950 kfree(bind_list);
1951 }
1952 mutex_unlock(&lock);
1953}
1954
3788d299
JG		 1955static void destroy_mc(struct rdma_id_private *id_priv,
1956 struct cma_multicast *mc)
88145678 1957{
2cc74e1e
CL		 1958 bool send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
1959
b5de0c60
JG		 1960 if (rdma_cap_ib_mcast(id_priv->id.device, id_priv->id.port_num))
1961 ib_sa_free_multicast(mc->sa_mc);
c0126915 1962
b5de0c60 1963 if (rdma_protocol_roce(id_priv->id.device, id_priv->id.port_num)) {
3788d299
JG		 1964 struct rdma_dev_addr *dev_addr =
1965 &id_priv->id.route.addr.dev_addr;
1966 struct net_device *ndev = NULL;
1967
1968 if (dev_addr->bound_dev_if)
1969 ndev = dev_get_by_index(dev_addr->net,
1970 dev_addr->bound_dev_if);
d9e410eb
MG		 1971 if (ndev && !send_only) {
1972 enum ib_gid_type gid_type;
b5de0c60
JG		 1973 union ib_gid mgid;
1974
d9e410eb
MG		 1975 gid_type = id_priv->cma_dev->default_gid_type
1976 [id_priv->id.port_num -
1977 rdma_start_port(
1978 id_priv->cma_dev->device)];
1979 cma_iboe_set_mgid((struct sockaddr *)&mc->addr, &mgid,
1980 gid_type);
1981 cma_igmp_send(ndev, &mgid, false);
3788d299 1982 }
d9e410eb 1983 dev_put(ndev);
fe454dc3
AH		 1984
1985 cancel_work_sync(&mc->iboe_join.work);
88145678 1986 }
b5de0c60 1987 kfree(mc);
88145678
PP		 1988}
1989
c8f6a362
SH		 1990static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
1991{
1992 struct cma_multicast *mc;
1993
1994 while (!list_empty(&id_priv->mc_list)) {
3788d299
JG		 1995 mc = list_first_entry(&id_priv->mc_list, struct cma_multicast,
1996 list);
c8f6a362 1997 list_del(&mc->list);
3788d299 1998 destroy_mc(id_priv, mc);
c8f6a362
SH		 1999 }
2000}
2001
f6a9d47a
JG		 2002static void _destroy_id(struct rdma_id_private *id_priv,
2003 enum rdma_cm_state state)
e51060f0 2004{
e51060f0
SH		 2005 cma_cancel_operation(id_priv, state);
2006
3d828754 2007 rdma_restrack_del(&id_priv->res);
fc008bdb 2008 cma_remove_id_from_tree(id_priv);
e51060f0 2009 if (id_priv->cma_dev) {
72219cea 2010 if (rdma_cap_ib_cm(id_priv->id.device, 1)) {
0c9361fc 2011 if (id_priv->cm_id.ib)
e51060f0 2012 ib_destroy_cm_id(id_priv->cm_id.ib);
04215330 2013 } else if (rdma_cap_iw_cm(id_priv->id.device, 1)) {
0c9361fc 2014 if (id_priv->cm_id.iw)
07ebafba 2015 iw_destroy_cm_id(id_priv->cm_id.iw);
e51060f0 2016 }
c8f6a362 2017 cma_leave_mc_groups(id_priv);
a396d43a 2018 cma_release_dev(id_priv);
e51060f0
SH		 2019 }
2020
2021 cma_release_port(id_priv);
e368d23f 2022 cma_id_put(id_priv);
e51060f0
SH		 2023 wait_for_completion(&id_priv->comp);
2024
d02d1f53 2025 if (id_priv->internal_id)
e368d23f 2026 cma_id_put(id_priv->id.context);
d02d1f53 2027
e51060f0 2028 kfree(id_priv->id.route.path_rec);
5a374949
MZ		 2029 kfree(id_priv->id.route.path_rec_inbound);
2030 kfree(id_priv->id.route.path_rec_outbound);
4ed13a5f 2031
fa20105e 2032 put_net(id_priv->id.route.addr.dev_addr.net);
e51060f0
SH		 2033 kfree(id_priv);
2034}
f6a9d47a
JG		 2035
2036/*
2037 * destroy an ID from within the handler_mutex. This ensures that no other
2038 * handlers can start running concurrently.
2039 */
2040static void destroy_id_handler_unlock(struct rdma_id_private *id_priv)
2041 __releases(&idprv->handler_mutex)
2042{
2043 enum rdma_cm_state state;
2044 unsigned long flags;
2045
2046 trace_cm_id_destroy(id_priv);
2047
2048 /*
2049 * Setting the state to destroyed under the handler mutex provides a
2050 * fence against calling handler callbacks. If this is invoked due to
2051 * the failure of a handler callback then it guarentees that no future
2052 * handlers will be called.
2053 */
2054 lockdep_assert_held(&id_priv->handler_mutex);
2055 spin_lock_irqsave(&id_priv->lock, flags);
2056 state = id_priv->state;
2057 id_priv->state = RDMA_CM_DESTROYING;
2058 spin_unlock_irqrestore(&id_priv->lock, flags);
2059 mutex_unlock(&id_priv->handler_mutex);
2060 _destroy_id(id_priv, state);
2061}
2062
2063void rdma_destroy_id(struct rdma_cm_id *id)
2064{
2065 struct rdma_id_private *id_priv =
2066 container_of(id, struct rdma_id_private, id);
2067
2068 mutex_lock(&id_priv->handler_mutex);
2069 destroy_id_handler_unlock(id_priv);
2070}
e51060f0
SH		 2071EXPORT_SYMBOL(rdma_destroy_id);
2072
2073static int cma_rep_recv(struct rdma_id_private *id_priv)
2074{
2075 int ret;
2076
5851bb89 2077 ret = cma_modify_qp_rtr(id_priv, NULL);
e51060f0
SH		 2078 if (ret)
2079 goto reject;
2080
5851bb89 2081 ret = cma_modify_qp_rts(id_priv, NULL);
e51060f0
SH		 2082 if (ret)
2083 goto reject;
2084
ed999f82 2085 trace_cm_send_rtu(id_priv);
e51060f0
SH		 2086 ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
2087 if (ret)
2088 goto reject;
2089
2090 return 0;
2091reject:
498683c6 2092 pr_debug_ratelimited("RDMA CM: CONNECT_ERROR: failed to handle reply. status %d\n", ret);
c5483388 2093 cma_modify_qp_err(id_priv);
ed999f82 2094 trace_cm_send_rej(id_priv);
e51060f0
SH		 2095 ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
2096 NULL, 0, NULL, 0);
2097 return ret;
2098}
2099
a1b1b61f 2100static void cma_set_rep_event_data(struct rdma_cm_event *event,
e7ff98ae 2101 const struct ib_cm_rep_event_param *rep_data,
a1b1b61f
SH		 2102 void *private_data)
2103{
2104 event->param.conn.private_data = private_data;
2105 event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
2106 event->param.conn.responder_resources = rep_data->responder_resources;
2107 event->param.conn.initiator_depth = rep_data->initiator_depth;
2108 event->param.conn.flow_control = rep_data->flow_control;
2109 event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
2110 event->param.conn.srq = rep_data->srq;
2111 event->param.conn.qp_num = rep_data->remote_qpn;
a20652e1
LR		 2112
2113 event->ece.vendor_id = rep_data->ece.vendor_id;
2114 event->ece.attr_mod = rep_data->ece.attr_mod;
a1b1b61f
SH		 2115}
2116
ed999f82
CL		 2117static int cma_cm_event_handler(struct rdma_id_private *id_priv,
2118 struct rdma_cm_event *event)
2119{
2120 int ret;
2121
3647a28d
JG		 2122 lockdep_assert_held(&id_priv->handler_mutex);
2123
ed999f82
CL		 2124 trace_cm_event_handler(id_priv, event);
2125 ret = id_priv->id.event_handler(&id_priv->id, event);
2126 trace_cm_event_done(id_priv, event, ret);
2127 return ret;
2128}
2129
e7ff98ae
PP		 2130static int cma_ib_handler(struct ib_cm_id *cm_id,
2131 const struct ib_cm_event *ib_event)
e51060f0
SH		 2132{
2133 struct rdma_id_private *id_priv = cm_id->context;
7582df82 2134 struct rdma_cm_event event = {};
2a7cec53 2135 enum rdma_cm_state state;
f6a9d47a 2136 int ret;
e51060f0 2137
37e07cda 2138 mutex_lock(&id_priv->handler_mutex);
2a7cec53 2139 state = READ_ONCE(id_priv->state);
38ca83a5 2140 if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
2a7cec53 2141 state != RDMA_CM_CONNECT) ||
38ca83a5 2142 (ib_event->event == IB_CM_TIMEWAIT_EXIT &&
2a7cec53 2143 state != RDMA_CM_DISCONNECT))
37e07cda 2144 goto out;
e51060f0
SH		 2145
2146 switch (ib_event->event) {
2147 case IB_CM_REQ_ERROR:
2148 case IB_CM_REP_ERROR:
a1b1b61f
SH		 2149 event.event = RDMA_CM_EVENT_UNREACHABLE;
2150 event.status = -ETIMEDOUT;
e51060f0
SH		 2151 break;
2152 case IB_CM_REP_RECEIVED:
2a7cec53 2153 if (state == RDMA_CM_CONNECT &&
ed999f82
CL		 2154 (id_priv->id.qp_type != IB_QPT_UD)) {
2155 trace_cm_send_mra(id_priv);
61c0ddbe 2156 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
ed999f82 2157 }
01602f11 2158 if (id_priv->id.qp) {
a1b1b61f
SH		 2159 event.status = cma_rep_recv(id_priv);
2160 event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
2161 RDMA_CM_EVENT_ESTABLISHED;
01602f11 2162 } else {
a1b1b61f 2163 event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
01602f11 2164 }
a1b1b61f
SH		 2165 cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
2166 ib_event->private_data);
e51060f0
SH		 2167 break;
2168 case IB_CM_RTU_RECEIVED:
0fe313b0
SH		 2169 case IB_CM_USER_ESTABLISHED:
2170 event.event = RDMA_CM_EVENT_ESTABLISHED;
e51060f0
SH		 2171 break;
2172 case IB_CM_DREQ_ERROR:
df561f66
GS		 2173 event.status = -ETIMEDOUT;
2174 fallthrough;
e51060f0
SH		 2175 case IB_CM_DREQ_RECEIVED:
2176 case IB_CM_DREP_RECEIVED:
550e5ca7
NM		 2177 if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
2178 RDMA_CM_DISCONNECT))
e51060f0 2179 goto out;
a1b1b61f 2180 event.event = RDMA_CM_EVENT_DISCONNECTED;
e51060f0
SH		 2181 break;
2182 case IB_CM_TIMEWAIT_EXIT:
38ca83a5
AV		 2183 event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
2184 break;
e51060f0
SH		 2185 case IB_CM_MRA_RECEIVED:
2186 /* ignore event */
2187 goto out;
2188 case IB_CM_REJ_RECEIVED:
498683c6
MS		 2189 pr_debug_ratelimited("RDMA CM: REJECTED: %s\n", rdma_reject_msg(&id_priv->id,
2190 ib_event->param.rej_rcvd.reason));
c5483388 2191 cma_modify_qp_err(id_priv);
a1b1b61f
SH		 2192 event.status = ib_event->param.rej_rcvd.reason;
2193 event.event = RDMA_CM_EVENT_REJECTED;
2194 event.param.conn.private_data = ib_event->private_data;
2195 event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
e51060f0
SH		 2196 break;
2197 default:
aba25a3e 2198 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
e51060f0
SH		 2199 ib_event->event);
2200 goto out;
2201 }
2202
ed999f82 2203 ret = cma_cm_event_handler(id_priv, &event);
e51060f0
SH		 2204 if (ret) {
2205 /* Destroy the CM ID by returning a non-zero value. */
2206 id_priv->cm_id.ib = NULL;
f6a9d47a 2207 destroy_id_handler_unlock(id_priv);
e51060f0
SH		 2208 return ret;
2209 }
2210out:
de910bd9 2211 mutex_unlock(&id_priv->handler_mutex);
f6a9d47a 2212 return 0;
e51060f0
SH		 2213}
2214
e7ff98ae 2215static struct rdma_id_private *
85463316
PP		 2216cma_ib_new_conn_id(const struct rdma_cm_id *listen_id,
2217 const struct ib_cm_event *ib_event,
2218 struct net_device *net_dev)
e51060f0 2219{
00313983 2220 struct rdma_id_private *listen_id_priv;
e51060f0
SH		 2221 struct rdma_id_private *id_priv;
2222 struct rdma_cm_id *id;
2223 struct rdma_route *rt;
0c505f70 2224 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
9fdca4da 2225 struct sa_path_rec *path = ib_event->param.req_rcvd.primary_path;
d3957b86
MD		 2226 const __be64 service_id =
2227 ib_event->param.req_rcvd.primary_path->service_id;
64c5e613 2228 int ret;
e51060f0 2229
00313983 2230 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
b09c4d70
LR		 2231 id_priv = __rdma_create_id(listen_id->route.addr.dev_addr.net,
2232 listen_id->event_handler, listen_id->context,
2233 listen_id->ps,
2234 ib_event->param.req_rcvd.qp_type,
2235 listen_id_priv);
2236 if (IS_ERR(id_priv))
0c9361fc 2237 return NULL;
3f168d2b 2238
b09c4d70 2239 id = &id_priv->id;
0c505f70
HE		 2240 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2241 (struct sockaddr *)&id->route.addr.dst_addr,
2242 listen_id, ib_event, ss_family, service_id))
fbaa1a6d 2243 goto err;
e51060f0
SH		 2244
2245 rt = &id->route;
bf9a9928
MZ		 2246 rt->num_pri_alt_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
2247 rt->path_rec = kmalloc_array(rt->num_pri_alt_paths,
2248 sizeof(*rt->path_rec), GFP_KERNEL);
e51060f0 2249 if (!rt->path_rec)
0c9361fc 2250 goto err;
e51060f0 2251
9fdca4da 2252 rt->path_rec[0] = *path;
bf9a9928 2253 if (rt->num_pri_alt_paths == 2)
e51060f0
SH		 2254 rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
2255
0b3ca768 2256 if (net_dev) {
77addc52 2257 rdma_copy_src_l2_addr(&rt->addr.dev_addr, net_dev);
0b3ca768 2258 } else {
b8cab5da
HE		 2259 if (!cma_protocol_roce(listen_id) &&
2260 cma_any_addr(cma_src_addr(id_priv))) {
2261 rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
2262 rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
2263 ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
2264 } else if (!cma_any_addr(cma_src_addr(id_priv))) {
2265 ret = cma_translate_addr(cma_src_addr(id_priv), &rt->addr.dev_addr);
2266 if (ret)
2267 goto err;
2268 }
6f8372b6
SH		 2269 }
2270 rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
e51060f0 2271
550e5ca7 2272 id_priv->state = RDMA_CM_CONNECT;
e51060f0 2273 return id_priv;
3f168d2b 2274
3f168d2b 2275err:
0c9361fc 2276 rdma_destroy_id(id);
e51060f0
SH		 2277 return NULL;
2278}
2279
e7ff98ae 2280static struct rdma_id_private *
85463316
PP		 2281cma_ib_new_udp_id(const struct rdma_cm_id *listen_id,
2282 const struct ib_cm_event *ib_event,
2283 struct net_device *net_dev)
628e5f6d 2284{
e7ff98ae 2285 const struct rdma_id_private *listen_id_priv;
628e5f6d
SH		 2286 struct rdma_id_private *id_priv;
2287 struct rdma_cm_id *id;
0c505f70 2288 const sa_family_t ss_family = listen_id->route.addr.src_addr.ss_family;
fa20105e 2289 struct net *net = listen_id->route.addr.dev_addr.net;
628e5f6d
SH		 2290 int ret;
2291
00313983 2292 listen_id_priv = container_of(listen_id, struct rdma_id_private, id);
b09c4d70
LR		 2293 id_priv = __rdma_create_id(net, listen_id->event_handler,
2294 listen_id->context, listen_id->ps, IB_QPT_UD,
2295 listen_id_priv);
2296 if (IS_ERR(id_priv))
628e5f6d
SH		 2297 return NULL;
2298
b09c4d70 2299 id = &id_priv->id;
0c505f70
HE		 2300 if (cma_save_net_info((struct sockaddr *)&id->route.addr.src_addr,
2301 (struct sockaddr *)&id->route.addr.dst_addr,
2302 listen_id, ib_event, ss_family,
2303 ib_event->param.sidr_req_rcvd.service_id))
628e5f6d
SH		 2304 goto err;
2305
0b3ca768 2306 if (net_dev) {
77addc52 2307 rdma_copy_src_l2_addr(&id->route.addr.dev_addr, net_dev);
0b3ca768 2308 } else {
b8cab5da
HE		 2309 if (!cma_any_addr(cma_src_addr(id_priv))) {
2310 ret = cma_translate_addr(cma_src_addr(id_priv),
2311 &id->route.addr.dev_addr);
2312 if (ret)
2313 goto err;
2314 }
6f8372b6 2315 }
628e5f6d 2316
550e5ca7 2317 id_priv->state = RDMA_CM_CONNECT;
628e5f6d
SH		 2318 return id_priv;
2319err:
2320 rdma_destroy_id(id);
2321 return NULL;
2322}
2323
a1b1b61f 2324static void cma_set_req_event_data(struct rdma_cm_event *event,
e7ff98ae 2325 const struct ib_cm_req_event_param *req_data,
a1b1b61f
SH		 2326 void *private_data, int offset)
2327{
2328 event->param.conn.private_data = private_data + offset;
2329 event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
2330 event->param.conn.responder_resources = req_data->responder_resources;
2331 event->param.conn.initiator_depth = req_data->initiator_depth;
2332 event->param.conn.flow_control = req_data->flow_control;
2333 event->param.conn.retry_count = req_data->retry_count;
2334 event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
2335 event->param.conn.srq = req_data->srq;
2336 event->param.conn.qp_num = req_data->remote_qpn;
a20652e1
LR		 2337
2338 event->ece.vendor_id = req_data->ece.vendor_id;
2339 event->ece.attr_mod = req_data->ece.attr_mod;
a1b1b61f
SH		 2340}
2341
85463316
PP		 2342static int cma_ib_check_req_qp_type(const struct rdma_cm_id *id,
2343 const struct ib_cm_event *ib_event)
9595480c 2344{
4dd81e89 2345 return (((ib_event->event == IB_CM_REQ_RECEIVED) &&
9595480c
HS		 2346 (ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
2347 ((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
2348 (id->qp_type == IB_QPT_UD)) ||
2349 (!id->qp_type));
2350}
2351
85463316
PP		 2352static int cma_ib_req_handler(struct ib_cm_id *cm_id,
2353 const struct ib_cm_event *ib_event)
e51060f0 2354{
37e07cda 2355 struct rdma_id_private *listen_id, *conn_id = NULL;
7582df82 2356 struct rdma_cm_event event = {};
41ab1cb7 2357 struct cma_req_info req = {};
0b3ca768 2358 struct net_device *net_dev;
c0b64f58
BVA		 2359 u8 offset;
2360 int ret;
e51060f0 2361
41ab1cb7 2362 listen_id = cma_ib_id_from_event(cm_id, ib_event, &req, &net_dev);
4c21b5bc
HE		 2363 if (IS_ERR(listen_id))
2364 return PTR_ERR(listen_id);
2365
ed999f82 2366 trace_cm_req_handler(listen_id, ib_event->event);
85463316 2367 if (!cma_ib_check_req_qp_type(&listen_id->id, ib_event)) {
0b3ca768
HE		 2368 ret = -EINVAL;
2369 goto net_dev_put;
2370 }
9595480c 2371
37e07cda 2372 mutex_lock(&listen_id->handler_mutex);
d490ee52 2373 if (READ_ONCE(listen_id->state) != RDMA_CM_LISTEN) {
0b3ca768 2374 ret = -ECONNABORTED;
f6a9d47a 2375 goto err_unlock;
0b3ca768 2376 }
e51060f0 2377
e8160e15 2378 offset = cma_user_data_offset(listen_id);
628e5f6d 2379 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
9595480c 2380 if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
85463316 2381 conn_id = cma_ib_new_udp_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 2382 event.param.ud.private_data = ib_event->private_data + offset;
2383 event.param.ud.private_data_len =
2384 IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
2385 } else {
85463316 2386 conn_id = cma_ib_new_conn_id(&listen_id->id, ib_event, net_dev);
628e5f6d
SH		 2387 cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
2388 ib_event->private_data, offset);
2389 }
e51060f0
SH		 2390 if (!conn_id) {
2391 ret = -ENOMEM;
f6a9d47a 2392 goto err_unlock;
e51060f0
SH		 2393 }
2394
de910bd9 2395 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
41ab1cb7 2396 ret = cma_ib_acquire_dev(conn_id, listen_id, &req);
f6a9d47a
JG		 2397 if (ret) {
2398 destroy_id_handler_unlock(conn_id);
2399 goto err_unlock;
2400 }
e51060f0
SH		 2401
2402 conn_id->cm_id.ib = cm_id;
2403 cm_id->context = conn_id;
2404 cm_id->cm_handler = cma_ib_handler;
2405
ed999f82 2406 ret = cma_cm_event_handler(conn_id, &event);
f6a9d47a
JG		 2407 if (ret) {
2408 /* Destroy the CM ID by returning a non-zero value. */
2409 conn_id->cm_id.ib = NULL;
2410 mutex_unlock(&listen_id->handler_mutex);
2411 destroy_id_handler_unlock(conn_id);
2412 goto net_dev_put;
2413 }
2414
2a7cec53
JG		 2415 if (READ_ONCE(conn_id->state) == RDMA_CM_CONNECT &&
2416 conn_id->id.qp_type != IB_QPT_UD) {
ed999f82 2417 trace_cm_send_mra(cm_id->context);
b6cec8aa 2418 ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
ed999f82 2419 }
b6cec8aa 2420 mutex_unlock(&conn_id->handler_mutex);
a1a733f6 2421
f6a9d47a 2422err_unlock:
de910bd9 2423 mutex_unlock(&listen_id->handler_mutex);
0b3ca768
HE		 2424
2425net_dev_put:
2426 if (net_dev)
2427 dev_put(net_dev);
2428
e51060f0
SH		 2429 return ret;
2430}
2431
cf53936f 2432__be64 rdma_get_service_id(struct rdma_cm_id *id, struct sockaddr *addr)
e51060f0 2433{
496ce3ce
SH		 2434 if (addr->sa_family == AF_IB)
2435 return ((struct sockaddr_ib *) addr)->sib_sid;
2436
cf53936f 2437 return cpu_to_be64(((u64)id->ps << 16) + be16_to_cpu(cma_port(addr)));
e51060f0 2438}
cf53936f 2439EXPORT_SYMBOL(rdma_get_service_id);
e51060f0 2440
411460ac
PP		 2441void rdma_read_gids(struct rdma_cm_id *cm_id, union ib_gid *sgid,
2442 union ib_gid *dgid)
2443{
2444 struct rdma_addr *addr = &cm_id->route.addr;
2445
2446 if (!cm_id->device) {
2447 if (sgid)
2448 memset(sgid, 0, sizeof(*sgid));
2449 if (dgid)
2450 memset(dgid, 0, sizeof(*dgid));
2451 return;
2452 }
2453
2454 if (rdma_protocol_roce(cm_id->device, cm_id->port_num)) {
2455 if (sgid)
2456 rdma_ip2gid((struct sockaddr *)&addr->src_addr, sgid);
2457 if (dgid)
2458 rdma_ip2gid((struct sockaddr *)&addr->dst_addr, dgid);
2459 } else {
2460 if (sgid)
2461 rdma_addr_get_sgid(&addr->dev_addr, sgid);
2462 if (dgid)
2463 rdma_addr_get_dgid(&addr->dev_addr, dgid);
2464 }
2465}
2466EXPORT_SYMBOL(rdma_read_gids);
2467
07ebafba
TT		 2468static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
2469{
2470 struct rdma_id_private *id_priv = iw_id->context;
7582df82 2471 struct rdma_cm_event event = {};
07ebafba 2472 int ret = 0;
24d44a39
SW		 2473 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2474 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba 2475
37e07cda 2476 mutex_lock(&id_priv->handler_mutex);
2a7cec53 2477 if (READ_ONCE(id_priv->state) != RDMA_CM_CONNECT)
37e07cda 2478 goto out;
07ebafba
TT		 2479
2480 switch (iw_event->event) {
2481 case IW_CM_EVENT_CLOSE:
a1b1b61f 2482 event.event = RDMA_CM_EVENT_DISCONNECTED;
07ebafba
TT		 2483 break;
2484 case IW_CM_EVENT_CONNECT_REPLY:
24d44a39
SW		 2485 memcpy(cma_src_addr(id_priv), laddr,
2486 rdma_addr_size(laddr));
2487 memcpy(cma_dst_addr(id_priv), raddr,
2488 rdma_addr_size(raddr));
881a045f
SW		 2489 switch (iw_event->status) {
2490 case 0:
a1b1b61f 2491 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 2492 event.param.conn.initiator_depth = iw_event->ird;
2493 event.param.conn.responder_resources = iw_event->ord;
881a045f
SW		 2494 break;
2495 case -ECONNRESET:
2496 case -ECONNREFUSED:
2497 event.event = RDMA_CM_EVENT_REJECTED;
2498 break;
2499 case -ETIMEDOUT:
2500 event.event = RDMA_CM_EVENT_UNREACHABLE;
2501 break;
2502 default:
2503 event.event = RDMA_CM_EVENT_CONNECT_ERROR;
2504 break;
2505 }
07ebafba
TT		 2506 break;
2507 case IW_CM_EVENT_ESTABLISHED:
a1b1b61f 2508 event.event = RDMA_CM_EVENT_ESTABLISHED;
3ebeebc3
KS		 2509 event.param.conn.initiator_depth = iw_event->ird;
2510 event.param.conn.responder_resources = iw_event->ord;
07ebafba
TT		 2511 break;
2512 default:
671a6cc2 2513 goto out;
07ebafba
TT		 2514 }
2515
a1b1b61f
SH		 2516 event.status = iw_event->status;
2517 event.param.conn.private_data = iw_event->private_data;
2518 event.param.conn.private_data_len = iw_event->private_data_len;
ed999f82 2519 ret = cma_cm_event_handler(id_priv, &event);
07ebafba
TT		 2520 if (ret) {
2521 /* Destroy the CM ID by returning a non-zero value. */
2522 id_priv->cm_id.iw = NULL;
f6a9d47a 2523 destroy_id_handler_unlock(id_priv);
07ebafba
TT		 2524 return ret;
2525 }
2526
37e07cda 2527out:
de910bd9 2528 mutex_unlock(&id_priv->handler_mutex);
07ebafba
TT		 2529 return ret;
2530}
2531
2532static int iw_conn_req_handler(struct iw_cm_id *cm_id,
2533 struct iw_cm_event *iw_event)
2534{
07ebafba 2535 struct rdma_id_private *listen_id, *conn_id;
7582df82 2536 struct rdma_cm_event event = {};
37e07cda 2537 int ret = -ECONNABORTED;
24d44a39
SW		 2538 struct sockaddr *laddr = (struct sockaddr *)&iw_event->local_addr;
2539 struct sockaddr *raddr = (struct sockaddr *)&iw_event->remote_addr;
07ebafba 2540
7582df82
PP		 2541 event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
2542 event.param.conn.private_data = iw_event->private_data;
2543 event.param.conn.private_data_len = iw_event->private_data_len;
2544 event.param.conn.initiator_depth = iw_event->ird;
2545 event.param.conn.responder_resources = iw_event->ord;
2546
07ebafba 2547 listen_id = cm_id->context;
37e07cda
BVA		 2548
2549 mutex_lock(&listen_id->handler_mutex);
d490ee52 2550 if (READ_ONCE(listen_id->state) != RDMA_CM_LISTEN)
37e07cda 2551 goto out;
07ebafba
TT		 2552
2553 /* Create a new RDMA id for the new IW CM ID */
b09c4d70
LR		 2554 conn_id = __rdma_create_id(listen_id->id.route.addr.dev_addr.net,
2555 listen_id->id.event_handler,
2556 listen_id->id.context, RDMA_PS_TCP,
2557 IB_QPT_RC, listen_id);
2558 if (IS_ERR(conn_id)) {
07ebafba
TT		 2559 ret = -ENOMEM;
2560 goto out;
2561 }
de910bd9 2562 mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
550e5ca7 2563 conn_id->state = RDMA_CM_CONNECT;
07ebafba 2564
575c7e58 2565 ret = rdma_translate_ip(laddr, &conn_id->id.route.addr.dev_addr);
07ebafba 2566 if (ret) {
f6a9d47a
JG		 2567 mutex_unlock(&listen_id->handler_mutex);
2568 destroy_id_handler_unlock(conn_id);
2569 return ret;
07ebafba
TT		 2570 }
2571
41ab1cb7 2572 ret = cma_iw_acquire_dev(conn_id, listen_id);
07ebafba 2573 if (ret) {
f6a9d47a
JG		 2574 mutex_unlock(&listen_id->handler_mutex);
2575 destroy_id_handler_unlock(conn_id);
2576 return ret;
07ebafba
TT		 2577 }
2578
2579 conn_id->cm_id.iw = cm_id;
2580 cm_id->context = conn_id;
2581 cm_id->cm_handler = cma_iw_handler;
2582
24d44a39
SW		 2583 memcpy(cma_src_addr(conn_id), laddr, rdma_addr_size(laddr));
2584 memcpy(cma_dst_addr(conn_id), raddr, rdma_addr_size(raddr));
07ebafba 2585
ed999f82 2586 ret = cma_cm_event_handler(conn_id, &event);
07ebafba
TT		 2587 if (ret) {
2588 /* User wants to destroy the CM ID */
2589 conn_id->cm_id.iw = NULL;
b66f31ef 2590 mutex_unlock(&listen_id->handler_mutex);
f6a9d47a 2591 destroy_id_handler_unlock(conn_id);
b66f31ef 2592 return ret;
07ebafba
TT		 2593 }
2594
de910bd9
OG		 2595 mutex_unlock(&conn_id->handler_mutex);
2596
07ebafba 2597out:
de910bd9 2598 mutex_unlock(&listen_id->handler_mutex);
07ebafba
TT		 2599 return ret;
2600}
2601
e51060f0
SH		 2602static int cma_ib_listen(struct rdma_id_private *id_priv)
2603{
e51060f0 2604 struct sockaddr *addr;
0c9361fc 2605 struct ib_cm_id *id;
e51060f0 2606 __be64 svc_id;
e51060f0 2607
51efe394
HE		 2608 addr = cma_src_addr(id_priv);
2609 svc_id = rdma_get_service_id(&id_priv->id, addr);
85463316
PP		 2610 id = ib_cm_insert_listen(id_priv->id.device,
2611 cma_ib_req_handler, svc_id);
0c9361fc
JM		 2612 if (IS_ERR(id))
2613 return PTR_ERR(id);
0c9361fc 2614 id_priv->cm_id.ib = id;
e51060f0 2615
51efe394 2616 return 0;
e51060f0
SH		 2617}
2618
07ebafba
TT		 2619static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
2620{
2621 int ret;
0c9361fc
JM		 2622 struct iw_cm_id *id;
2623
2624 id = iw_create_cm_id(id_priv->id.device,
2625 iw_conn_req_handler,
2626 id_priv);
2627 if (IS_ERR(id))
2628 return PTR_ERR(id);
07ebafba 2629
ca0c448d 2630 mutex_lock(&id_priv->qp_mutex);
68cdba06 2631 id->tos = id_priv->tos;
926ba19b 2632 id->tos_set = id_priv->tos_set;
ca0c448d 2633 mutex_unlock(&id_priv->qp_mutex);
e35ecb46 2634 id->afonly = id_priv->afonly;
0c9361fc 2635 id_priv->cm_id.iw = id;
07ebafba 2636
24d44a39
SW		 2637 memcpy(&id_priv->cm_id.iw->local_addr, cma_src_addr(id_priv),
2638 rdma_addr_size(cma_src_addr(id_priv)));
07ebafba
TT		 2639
2640 ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
2641
2642 if (ret) {
2643 iw_destroy_cm_id(id_priv->cm_id.iw);
2644 id_priv->cm_id.iw = NULL;
2645 }
2646
2647 return ret;
2648}
2649
e51060f0
SH		 2650static int cma_listen_handler(struct rdma_cm_id *id,
2651 struct rdma_cm_event *event)
2652{
2653 struct rdma_id_private *id_priv = id->context;
2654
d54f23c0
JG		 2655 /* Listening IDs are always destroyed on removal */
2656 if (event->event == RDMA_CM_EVENT_DEVICE_REMOVAL)
2657 return -1;
2658
e51060f0
SH		 2659 id->context = id_priv->id.context;
2660 id->event_handler = id_priv->id.event_handler;
ed999f82 2661 trace_cm_event_handler(id_priv, event);
e51060f0
SH		 2662 return id_priv->id.event_handler(id, event);
2663}
2664
c80a0c52 2665static int cma_listen_on_dev(struct rdma_id_private *id_priv,
dd37d2f5
JG		 2666 struct cma_device *cma_dev,
2667 struct rdma_id_private **to_destroy)
e51060f0
SH		 2668{
2669 struct rdma_id_private *dev_id_priv;
fa20105e 2670 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0
SH		 2671 int ret;
2672
730c8912
MZ		 2673 lockdep_assert_held(&lock);
2674
dd37d2f5 2675 *to_destroy = NULL;
72219cea 2676 if (cma_family(id_priv) == AF_IB && !rdma_cap_ib_cm(cma_dev->device, 1))
c80a0c52 2677 return 0;
94d0c939 2678
b09c4d70
LR		 2679 dev_id_priv =
2680 __rdma_create_id(net, cma_listen_handler, id_priv,
2681 id_priv->id.ps, id_priv->id.qp_type, id_priv);
2682 if (IS_ERR(dev_id_priv))
c80a0c52 2683 return PTR_ERR(dev_id_priv);
e51060f0 2684
550e5ca7 2685 dev_id_priv->state = RDMA_CM_ADDR_BOUND;
f4753834
SH		 2686 memcpy(cma_src_addr(dev_id_priv), cma_src_addr(id_priv),
2687 rdma_addr_size(cma_src_addr(id_priv)));
e51060f0 2688
045959db 2689 _cma_attach_to_dev(dev_id_priv, cma_dev);
cb5cd0ea 2690 rdma_restrack_add(&dev_id_priv->res);
e368d23f 2691 cma_id_get(id_priv);
d02d1f53 2692 dev_id_priv->internal_id = 1;
5b0ec991 2693 dev_id_priv->afonly = id_priv->afonly;
ca0c448d 2694 mutex_lock(&id_priv->qp_mutex);
9491128f
SW		 2695 dev_id_priv->tos_set = id_priv->tos_set;
2696 dev_id_priv->tos = id_priv->tos;
ca0c448d 2697 mutex_unlock(&id_priv->qp_mutex);
e51060f0 2698
b09c4d70 2699 ret = rdma_listen(&dev_id_priv->id, id_priv->backlog);
e51060f0 2700 if (ret)
c80a0c52 2701 goto err_listen;
99cfddb8 2702 list_add_tail(&dev_id_priv->listen_item, &id_priv->listen_list);
c80a0c52
LR		 2703 return 0;
2704err_listen:
dd37d2f5
JG		 2705 /* Caller must destroy this after releasing lock */
2706 *to_destroy = dev_id_priv;
c80a0c52 2707 dev_warn(&cma_dev->device->dev, "RDMA CMA: %s, error %d\n", __func__, ret);
c80a0c52 2708 return ret;
e51060f0
SH		 2709}
2710
c80a0c52 2711static int cma_listen_on_all(struct rdma_id_private *id_priv)
e51060f0 2712{
dd37d2f5 2713 struct rdma_id_private *to_destroy;
e51060f0 2714 struct cma_device *cma_dev;
c80a0c52 2715 int ret;
e51060f0
SH		 2716
2717 mutex_lock(&lock);
99cfddb8 2718 list_add_tail(&id_priv->listen_any_item, &listen_any_list);
c80a0c52 2719 list_for_each_entry(cma_dev, &dev_list, list) {
dd37d2f5
JG		 2720 ret = cma_listen_on_dev(id_priv, cma_dev, &to_destroy);
2721 if (ret) {
2722 /* Prevent racing with cma_process_remove() */
2723 if (to_destroy)
99cfddb8 2724 list_del_init(&to_destroy->device_item);
c80a0c52 2725 goto err_listen;
dd37d2f5 2726 }
c80a0c52
LR		 2727 }
2728 mutex_unlock(&lock);
2729 return 0;
2730
2731err_listen:
ca465e1f 2732 _cma_cancel_listens(id_priv);
e51060f0 2733 mutex_unlock(&lock);
dd37d2f5
JG		 2734 if (to_destroy)
2735 rdma_destroy_id(&to_destroy->id);
c80a0c52 2736 return ret;
e51060f0
SH		 2737}
2738
a81c994d
SH		 2739void rdma_set_service_type(struct rdma_cm_id *id, int tos)
2740{
2741 struct rdma_id_private *id_priv;
2742
2743 id_priv = container_of(id, struct rdma_id_private, id);
ca0c448d 2744 mutex_lock(&id_priv->qp_mutex);
a81c994d 2745 id_priv->tos = (u8) tos;
89052d78 2746 id_priv->tos_set = true;
ca0c448d 2747 mutex_unlock(&id_priv->qp_mutex);
a81c994d
SH		 2748}
2749EXPORT_SYMBOL(rdma_set_service_type);
2750
2c1619ed
DG		 2751/**
2752 * rdma_set_ack_timeout() - Set the ack timeout of QP associated
2753 * with a connection identifier.
2754 * @id: Communication identifier to associated with service type.
2755 * @timeout: Ack timeout to set a QP, expressed as 4.096 * 2^(timeout) usec.
2756 *
2757 * This function should be called before rdma_connect() on active side,
2758 * and on passive side before rdma_accept(). It is applicable to primary
2759 * path only. The timeout will affect the local side of the QP, it is not
e1ee1e62
DM		 2760 * negotiated with remote side and zero disables the timer. In case it is
2761 * set before rdma_resolve_route, the value will also be used to determine
2762 * PacketLifeTime for RoCE.
2c1619ed
DG		 2763 *
2764 * Return: 0 for success
2765 */
2766int rdma_set_ack_timeout(struct rdma_cm_id *id, u8 timeout)
2767{
2768 struct rdma_id_private *id_priv;
2769
748663c8 2770 if (id->qp_type != IB_QPT_RC && id->qp_type != IB_QPT_XRC_INI)
2c1619ed
DG		 2771 return -EINVAL;
2772
2773 id_priv = container_of(id, struct rdma_id_private, id);
ca0c448d 2774 mutex_lock(&id_priv->qp_mutex);
2c1619ed
DG		 2775 id_priv->timeout = timeout;
2776 id_priv->timeout_set = true;
ca0c448d 2777 mutex_unlock(&id_priv->qp_mutex);
2c1619ed
DG		 2778
2779 return 0;
2780}
2781EXPORT_SYMBOL(rdma_set_ack_timeout);
2782
3aeffc46
HB		 2783/**
2784 * rdma_set_min_rnr_timer() - Set the minimum RNR Retry timer of the
2785 * QP associated with a connection identifier.
2786 * @id: Communication identifier to associated with service type.
2787 * @min_rnr_timer: 5-bit value encoded as Table 45: "Encoding for RNR NAK
2788 * Timer Field" in the IBTA specification.
2789 *
2790 * This function should be called before rdma_connect() on active
2791 * side, and on passive side before rdma_accept(). The timer value
2792 * will be associated with the local QP. When it receives a send it is
2793 * not read to handle, typically if the receive queue is empty, an RNR
2794 * Retry NAK is returned to the requester with the min_rnr_timer
2795 * encoded. The requester will then wait at least the time specified
2796 * in the NAK before retrying. The default is zero, which translates
2797 * to a minimum RNR Timer value of 655 ms.
2798 *
2799 * Return: 0 for success
2800 */
2801int rdma_set_min_rnr_timer(struct rdma_cm_id *id, u8 min_rnr_timer)
2802{
2803 struct rdma_id_private *id_priv;
2804
2805 /* It is a five-bit value */
2806 if (min_rnr_timer & 0xe0)
2807 return -EINVAL;
2808
2809 if (WARN_ON(id->qp_type != IB_QPT_RC && id->qp_type != IB_QPT_XRC_TGT))
2810 return -EINVAL;
2811
2812 id_priv = container_of(id, struct rdma_id_private, id);
ca0c448d 2813 mutex_lock(&id_priv->qp_mutex);
3aeffc46
HB		 2814 id_priv->min_rnr_timer = min_rnr_timer;
2815 id_priv->min_rnr_timer_set = true;
ca0c448d 2816 mutex_unlock(&id_priv->qp_mutex);
3aeffc46
HB		 2817
2818 return 0;
2819}
2820EXPORT_SYMBOL(rdma_set_min_rnr_timer);
2821
5a374949
MZ		 2822static void route_set_path_rec_inbound(struct cma_work *work,
2823 struct sa_path_rec *path_rec)
2824{
2825 struct rdma_route *route = &work->id->id.route;
2826
2827 if (!route->path_rec_inbound) {
2828 route->path_rec_inbound =
2829 kzalloc(sizeof(*route->path_rec_inbound), GFP_KERNEL);
2830 if (!route->path_rec_inbound)
2831 return;
2832 }
2833
2834 *route->path_rec_inbound = *path_rec;
2835}
2836
2837static void route_set_path_rec_outbound(struct cma_work *work,
2838 struct sa_path_rec *path_rec)
2839{
2840 struct rdma_route *route = &work->id->id.route;
2841
2842 if (!route->path_rec_outbound) {
2843 route->path_rec_outbound =
2844 kzalloc(sizeof(*route->path_rec_outbound), GFP_KERNEL);
2845 if (!route->path_rec_outbound)
2846 return;
2847 }
2848
2849 *route->path_rec_outbound = *path_rec;
2850}
2851
c2f8fc4e 2852static void cma_query_handler(int status, struct sa_path_rec *path_rec,
5a374949 2853 int num_prs, void *context)
e51060f0
SH		 2854{
2855 struct cma_work *work = context;
2856 struct rdma_route *route;
5a374949 2857 int i;
e51060f0
SH		 2858
2859 route = &work->id->id.route;
2860
5a374949
MZ		 2861 if (status)
2862 goto fail;
2863
2864 for (i = 0; i < num_prs; i++) {
2865 if (!path_rec[i].flags || (path_rec[i].flags & IB_PATH_GMP))
2866 *route->path_rec = path_rec[i];
2867 else if (path_rec[i].flags & IB_PATH_INBOUND)
2868 route_set_path_rec_inbound(work, &path_rec[i]);
2869 else if (path_rec[i].flags & IB_PATH_OUTBOUND)
2870 route_set_path_rec_outbound(work, &path_rec[i]);
2871 }
2872 if (!route->path_rec) {
2873 status = -EINVAL;
2874 goto fail;
e51060f0
SH		 2875 }
2876
5a374949
MZ		 2877 route->num_pri_alt_paths = 1;
2878 queue_work(cma_wq, &work->work);
2879 return;
2880
2881fail:
2882 work->old_state = RDMA_CM_ROUTE_QUERY;
2883 work->new_state = RDMA_CM_ADDR_RESOLVED;
2884 work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
2885 work->event.status = status;
2886 pr_debug_ratelimited("RDMA CM: ROUTE_ERROR: failed to query path. status %d\n",
2887 status);
e51060f0
SH		 2888 queue_work(cma_wq, &work->work);
2889}
2890
dbace111
LR		 2891static int cma_query_ib_route(struct rdma_id_private *id_priv,
2892 unsigned long timeout_ms, struct cma_work *work)
e51060f0 2893{
f4753834 2894 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
c2f8fc4e 2895 struct sa_path_rec path_rec;
a81c994d
SH		 2896 ib_sa_comp_mask comp_mask;
2897 struct sockaddr_in6 *sin6;
f68194ca 2898 struct sockaddr_ib *sib;
e51060f0
SH		 2899
2900 memset(&path_rec, 0, sizeof path_rec);
4c33bd19
DC		 2901
2902 if (rdma_cap_opa_ah(id_priv->id.device, id_priv->id.port_num))
2903 path_rec.rec_type = SA_PATH_REC_TYPE_OPA;
2904 else
2905 path_rec.rec_type = SA_PATH_REC_TYPE_IB;
f4753834
SH		 2906 rdma_addr_get_sgid(dev_addr, &path_rec.sgid);
2907 rdma_addr_get_dgid(dev_addr, &path_rec.dgid);
2908 path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
e51060f0 2909 path_rec.numb_path = 1;
962063e6 2910 path_rec.reversible = 1;
d3957b86
MD		 2911 path_rec.service_id = rdma_get_service_id(&id_priv->id,
2912 cma_dst_addr(id_priv));
a81c994d
SH		 2913
2914 comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
2915 IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
2916 IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
2917
f68194ca
SH		 2918 switch (cma_family(id_priv)) {
2919 case AF_INET:
a81c994d
SH		 2920 path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
2921 comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
f68194ca
SH		 2922 break;
2923 case AF_INET6:
f4753834 2924 sin6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
a81c994d
SH		 2925 path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
2926 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
f68194ca
SH		 2927 break;
2928 case AF_IB:
2929 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
2930 path_rec.traffic_class = (u8) (be32_to_cpu(sib->sib_flowinfo) >> 20);
2931 comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
2932 break;
a81c994d 2933 }
e51060f0 2934
c1a0b23b 2935 id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
a81c994d
SH		 2936 id_priv->id.port_num, &path_rec,
2937 comp_mask, timeout_ms,
2938 GFP_KERNEL, cma_query_handler,
2939 work, &id_priv->query);
e51060f0
SH		 2940
2941 return (id_priv->query_id < 0) ? id_priv->query_id : 0;
2942}
2943
fe454dc3
AH		 2944static void cma_iboe_join_work_handler(struct work_struct *work)
2945{
2946 struct cma_multicast *mc =
2947 container_of(work, struct cma_multicast, iboe_join.work);
2948 struct rdma_cm_event *event = &mc->iboe_join.event;
2949 struct rdma_id_private *id_priv = mc->id_priv;
2950 int ret;
2951
2952 mutex_lock(&id_priv->handler_mutex);
2953 if (READ_ONCE(id_priv->state) == RDMA_CM_DESTROYING ||
2954 READ_ONCE(id_priv->state) == RDMA_CM_DEVICE_REMOVAL)
2955 goto out_unlock;
2956
2957 ret = cma_cm_event_handler(id_priv, event);
2958 WARN_ON(ret);
2959
2960out_unlock:
2961 mutex_unlock(&id_priv->handler_mutex);
2962 if (event->event == RDMA_CM_EVENT_MULTICAST_JOIN)
2963 rdma_destroy_ah_attr(&event->param.ud.ah_attr);
2964}
2965
c4028958 2966static void cma_work_handler(struct work_struct *_work)
e51060f0 2967{
c4028958 2968 struct cma_work *work = container_of(_work, struct cma_work, work);
e51060f0 2969 struct rdma_id_private *id_priv = work->id;
e51060f0 2970
de910bd9 2971 mutex_lock(&id_priv->handler_mutex);
7e85bcda
JG		 2972 if (READ_ONCE(id_priv->state) == RDMA_CM_DESTROYING ||
2973 READ_ONCE(id_priv->state) == RDMA_CM_DEVICE_REMOVAL)
f6a9d47a 2974 goto out_unlock;
7e85bcda
JG		 2975 if (work->old_state != 0 || work->new_state != 0) {
2976 if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
2977 goto out_unlock;
e51060f0 2978 }
f6a9d47a 2979
ed999f82 2980 if (cma_cm_event_handler(id_priv, &work->event)) {
f6a9d47a
JG		 2981 cma_id_put(id_priv);
2982 destroy_id_handler_unlock(id_priv);
2983 goto out_free;
dd5bdff8
OG		 2984 }
2985
f6a9d47a 2986out_unlock:
dd5bdff8 2987 mutex_unlock(&id_priv->handler_mutex);
e368d23f 2988 cma_id_put(id_priv);
f6a9d47a 2989out_free:
b5de0c60
JG		 2990 if (work->event.event == RDMA_CM_EVENT_MULTICAST_JOIN)
2991 rdma_destroy_ah_attr(&work->event.param.ud.ah_attr);
dd5bdff8
OG		 2992 kfree(work);
2993}
2994
981b5a23
PP		 2995static void cma_init_resolve_route_work(struct cma_work *work,
2996 struct rdma_id_private *id_priv)
2997{
2998 work->id = id_priv;
2999 INIT_WORK(&work->work, cma_work_handler);
3000 work->old_state = RDMA_CM_ROUTE_QUERY;
3001 work->new_state = RDMA_CM_ROUTE_RESOLVED;
3002 work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
3003}
3004
081ea519
PP		 3005static void enqueue_resolve_addr_work(struct cma_work *work,
3006 struct rdma_id_private *id_priv)
981b5a23 3007{
e368d23f
PP		 3008 /* Balances with cma_id_put() in cma_work_handler */
3009 cma_id_get(id_priv);
081ea519 3010
981b5a23
PP		 3011 work->id = id_priv;
3012 INIT_WORK(&work->work, cma_work_handler);
3013 work->old_state = RDMA_CM_ADDR_QUERY;
3014 work->new_state = RDMA_CM_ADDR_RESOLVED;
3015 work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
081ea519
PP		 3016
3017 queue_work(cma_wq, &work->work);
981b5a23
PP		 3018}
3019
dbace111
LR		 3020static int cma_resolve_ib_route(struct rdma_id_private *id_priv,
3021 unsigned long timeout_ms)
e51060f0
SH		 3022{
3023 struct rdma_route *route = &id_priv->id.route;
3024 struct cma_work *work;
3025 int ret;
3026
3027 work = kzalloc(sizeof *work, GFP_KERNEL);
3028 if (!work)
3029 return -ENOMEM;
3030
981b5a23 3031 cma_init_resolve_route_work(work, id_priv);
e51060f0 3032
74f160ea
GR		 3033 if (!route->path_rec)
3034 route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
e51060f0
SH		 3035 if (!route->path_rec) {
3036 ret = -ENOMEM;
3037 goto err1;
3038 }
3039
3040 ret = cma_query_ib_route(id_priv, timeout_ms, work);
3041 if (ret)
3042 goto err2;
3043
3044 return 0;
3045err2:
3046 kfree(route->path_rec);
3047 route->path_rec = NULL;
3048err1:
3049 kfree(work);
3050 return ret;
3051}
3052
9327c7af
PP		 3053static enum ib_gid_type cma_route_gid_type(enum rdma_network_type network_type,
3054 unsigned long supported_gids,
3055 enum ib_gid_type default_gid)
3056{
3057 if ((network_type == RDMA_NETWORK_IPV4 ||
3058 network_type == RDMA_NETWORK_IPV6) &&
3059 test_bit(IB_GID_TYPE_ROCE_UDP_ENCAP, &supported_gids))
3060 return IB_GID_TYPE_ROCE_UDP_ENCAP;
3061
3062 return default_gid;
3063}
3064
3065/*
3066 * cma_iboe_set_path_rec_l2_fields() is helper function which sets
3067 * path record type based on GID type.
3068 * It also sets up other L2 fields which includes destination mac address
3069 * netdev ifindex, of the path record.
3070 * It returns the netdev of the bound interface for this path record entry.
3071 */
3072static struct net_device *
3073cma_iboe_set_path_rec_l2_fields(struct rdma_id_private *id_priv)
3074{
3075 struct rdma_route *route = &id_priv->id.route;
3076 enum ib_gid_type gid_type = IB_GID_TYPE_ROCE;
3077 struct rdma_addr *addr = &route->addr;
3078 unsigned long supported_gids;
3079 struct net_device *ndev;
3080
3081 if (!addr->dev_addr.bound_dev_if)
3082 return NULL;
3083
3084 ndev = dev_get_by_index(addr->dev_addr.net,
3085 addr->dev_addr.bound_dev_if);
3086 if (!ndev)
3087 return NULL;
3088
3089 supported_gids = roce_gid_type_mask_support(id_priv->id.device,
3090 id_priv->id.port_num);
3091 gid_type = cma_route_gid_type(addr->dev_addr.network,
3092 supported_gids,
3093 id_priv->gid_type);
3094 /* Use the hint from IP Stack to select GID Type */
3095 if (gid_type < ib_network_to_gid_type(addr->dev_addr.network))
3096 gid_type = ib_network_to_gid_type(addr->dev_addr.network);
3097 route->path_rec->rec_type = sa_conv_gid_to_pathrec_type(gid_type);
3098
114cc9c4 3099 route->path_rec->roce.route_resolved = true;
9327c7af
PP		 3100 sa_path_set_dmac(route->path_rec, addr->dev_addr.dst_dev_addr);
3101 return ndev;
3102}
3103
fe75889f
PP		 3104int rdma_set_ib_path(struct rdma_cm_id *id,
3105 struct sa_path_rec *path_rec)
e51060f0
SH		 3106{
3107 struct rdma_id_private *id_priv;
8d20a1f0 3108 struct net_device *ndev;
e51060f0
SH		 3109 int ret;
3110
3111 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7
NM		 3112 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
3113 RDMA_CM_ROUTE_RESOLVED))
e51060f0
SH		 3114 return -EINVAL;
3115
fe75889f 3116 id->route.path_rec = kmemdup(path_rec, sizeof(*path_rec),
9893e742 3117 GFP_KERNEL);
e51060f0
SH		 3118 if (!id->route.path_rec) {
3119 ret = -ENOMEM;
3120 goto err;
3121 }
3122
8d20a1f0
PP		 3123 if (rdma_protocol_roce(id->device, id->port_num)) {
3124 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
3125 if (!ndev) {
3126 ret = -ENODEV;
3127 goto err_free;
3128 }
3129 dev_put(ndev);
3130 }
3131
bf9a9928 3132 id->route.num_pri_alt_paths = 1;
e51060f0 3133 return 0;
8d20a1f0
PP		 3134
3135err_free:
3136 kfree(id->route.path_rec);
3137 id->route.path_rec = NULL;
e51060f0 3138err:
550e5ca7 3139 cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
e51060f0
SH		 3140 return ret;
3141}
fe75889f 3142EXPORT_SYMBOL(rdma_set_ib_path);
e51060f0 3143
d6f91252 3144static int cma_resolve_iw_route(struct rdma_id_private *id_priv)
07ebafba
TT		 3145{
3146 struct cma_work *work;
3147
3148 work = kzalloc(sizeof *work, GFP_KERNEL);
3149 if (!work)
3150 return -ENOMEM;
3151
981b5a23 3152 cma_init_resolve_route_work(work, id_priv);
07ebafba
TT		 3153 queue_work(cma_wq, &work->work);
3154 return 0;
3155}
3156
d3bd9396 3157static int get_vlan_ndev_tc(struct net_device *vlan_ndev, int prio)
eb072c4b 3158{
eb072c4b
EP		 3159 struct net_device *dev;
3160
d3bd9396 3161 dev = vlan_dev_real_dev(vlan_ndev);
eb072c4b
EP		 3162 if (dev->num_tc)
3163 return netdev_get_prio_tc_map(dev, prio);
3164
d3bd9396
PP		 3165 return (vlan_dev_get_egress_qos_mask(vlan_ndev, prio) &
3166 VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
3167}
3168
3169struct iboe_prio_tc_map {
3170 int input_prio;
3171 int output_tc;
3172 bool found;
3173};
3174
eff74233
TY		 3175static int get_lower_vlan_dev_tc(struct net_device *dev,
3176 struct netdev_nested_priv *priv)
d3bd9396 3177{
eff74233 3178 struct iboe_prio_tc_map *map = (struct iboe_prio_tc_map *)priv->data;
d3bd9396
PP		 3179
3180 if (is_vlan_dev(dev))
3181 map->output_tc = get_vlan_ndev_tc(dev, map->input_prio);
3182 else if (dev->num_tc)
3183 map->output_tc = netdev_get_prio_tc_map(dev, map->input_prio);
3184 else
3185 map->output_tc = 0;
3186 /* We are interested only in first level VLAN device, so always
3187 * return 1 to stop iterating over next level devices.
3188 */
3189 map->found = true;
3190 return 1;
3191}
3192
3193static int iboe_tos_to_sl(struct net_device *ndev, int tos)
3194{
3195 struct iboe_prio_tc_map prio_tc_map = {};
3196 int prio = rt_tos2priority(tos);
eff74233 3197 struct netdev_nested_priv priv;
d3bd9396
PP		 3198
3199 /* If VLAN device, get it directly from the VLAN netdev */
d0d7b10b 3200 if (is_vlan_dev(ndev))
d3bd9396
PP		 3201 return get_vlan_ndev_tc(ndev, prio);
3202
3203 prio_tc_map.input_prio = prio;
eff74233 3204 priv.data = (void *)&prio_tc_map;
d3bd9396
PP		 3205 rcu_read_lock();
3206 netdev_walk_all_lower_dev_rcu(ndev,
3207 get_lower_vlan_dev_tc,
eff74233 3208 &priv);
d3bd9396
PP		 3209 rcu_read_unlock();
3210 /* If map is found from lower device, use it; Otherwise
3211 * continue with the current netdevice to get priority to tc map.
3212 */
3213 if (prio_tc_map.found)
3214 return prio_tc_map.output_tc;
3215 else if (ndev->num_tc)
3216 return netdev_get_prio_tc_map(ndev, prio);
3217 else
3218 return 0;
eb072c4b
EP		 3219}
3220
f6653405
MZ		 3221static __be32 cma_get_roce_udp_flow_label(struct rdma_id_private *id_priv)
3222{
3223 struct sockaddr_in6 *addr6;
3224 u16 dport, sport;
3225 u32 hash, fl;
3226
3227 addr6 = (struct sockaddr_in6 *)cma_src_addr(id_priv);
3228 fl = be32_to_cpu(addr6->sin6_flowinfo) & IB_GRH_FLOWLABEL_MASK;
3229 if ((cma_family(id_priv) != AF_INET6) || !fl) {
3230 dport = be16_to_cpu(cma_port(cma_dst_addr(id_priv)));
3231 sport = be16_to_cpu(cma_port(cma_src_addr(id_priv)));
3232 hash = (u32)sport * 31 + dport;
3233 fl = hash & IB_GRH_FLOWLABEL_MASK;
3234 }
3235
3236 return cpu_to_be32(fl);
3237}
3238
3c86aa70
EC		 3239static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
3240{
3241 struct rdma_route *route = &id_priv->id.route;
3242 struct rdma_addr *addr = &route->addr;
3243 struct cma_work *work;
3244 int ret;
4367ec7f 3245 struct net_device *ndev;
4367ec7f 3246
89052d78
MD		 3247 u8 default_roce_tos = id_priv->cma_dev->default_roce_tos[id_priv->id.port_num -
3248 rdma_start_port(id_priv->cma_dev->device)];
ca0c448d 3249 u8 tos;
dd5f03be 3250
ca0c448d
HB		 3251 mutex_lock(&id_priv->qp_mutex);
3252 tos = id_priv->tos_set ? id_priv->tos : default_roce_tos;
3253 mutex_unlock(&id_priv->qp_mutex);
3c86aa70 3254
3c86aa70
EC		 3255 work = kzalloc(sizeof *work, GFP_KERNEL);
3256 if (!work)
3257 return -ENOMEM;
3258
3c86aa70
EC		 3259 route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
3260 if (!route->path_rec) {
3261 ret = -ENOMEM;
3262 goto err1;
3263 }
3264
bf9a9928 3265 route->num_pri_alt_paths = 1;
3c86aa70 3266
9327c7af 3267 ndev = cma_iboe_set_path_rec_l2_fields(id_priv);
3c86aa70
EC		 3268 if (!ndev) {
3269 ret = -ENODEV;
3270 goto err2;
3271 }
3272
7b85627b
MS		 3273 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
3274 &route->path_rec->sgid);
3275 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.dst_addr,
3276 &route->path_rec->dgid);
af7bd463 3277
c3efe750 3278 if (((struct sockaddr *)&id_priv->id.route.addr.dst_addr)->sa_family != AF_IB)
c865f246 3279 /* TODO: get the hoplimit from the inet/inet6 device */
c3efe750
MB		 3280 route->path_rec->hop_limit = addr->dev_addr.hoplimit;
3281 else
c865f246 3282 route->path_rec->hop_limit = 1;
af7bd463
EC		 3283 route->path_rec->reversible = 1;
3284 route->path_rec->pkey = cpu_to_be16(0xffff);
3285 route->path_rec->mtu_selector = IB_SA_EQ;
89052d78
MD		 3286 route->path_rec->sl = iboe_tos_to_sl(ndev, tos);
3287 route->path_rec->traffic_class = tos;
3c86aa70
EC		 3288 route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
3289 route->path_rec->rate_selector = IB_SA_EQ;
3290 route->path_rec->rate = iboe_get_rate(ndev);
3291 dev_put(ndev);
3292 route->path_rec->packet_life_time_selector = IB_SA_EQ;
e1ee1e62
DM		 3293 /* In case ACK timeout is set, use this value to calculate
3294 * PacketLifeTime. As per IBTA 12.7.34,
3295 * local ACK timeout = (2 * PacketLifeTime + Local CA’s ACK delay).
3296 * Assuming a negligible local ACK delay, we can use
3297 * PacketLifeTime = local ACK timeout/2
3298 * as a reasonable approximation for RoCE networks.
3299 */
ca0c448d 3300 mutex_lock(&id_priv->qp_mutex);
e84045ea
HB		 3301 if (id_priv->timeout_set && id_priv->timeout)
3302 route->path_rec->packet_life_time = id_priv->timeout - 1;
3303 else
3304 route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
ca0c448d 3305 mutex_unlock(&id_priv->qp_mutex);
e1ee1e62 3306
3c86aa70
EC		 3307 if (!route->path_rec->mtu) {
3308 ret = -EINVAL;
3309 goto err2;
3310 }
3311
f6653405
MZ		 3312 if (rdma_protocol_roce_udp_encap(id_priv->id.device,
3313 id_priv->id.port_num))
3314 route->path_rec->flow_label =
3315 cma_get_roce_udp_flow_label(id_priv);
3316
981b5a23 3317 cma_init_resolve_route_work(work, id_priv);
3c86aa70
EC		 3318 queue_work(cma_wq, &work->work);
3319
3320 return 0;
3321
3322err2:
3323 kfree(route->path_rec);
3324 route->path_rec = NULL;
bf9a9928 3325 route->num_pri_alt_paths = 0;
3c86aa70
EC		 3326err1:
3327 kfree(work);
3328 return ret;
3329}
3330
dbace111 3331int rdma_resolve_route(struct rdma_cm_id *id, unsigned long timeout_ms)
e51060f0
SH		 3332{
3333 struct rdma_id_private *id_priv;
3334 int ret;
3335
5f5a6509
HB		 3336 if (!timeout_ms)
3337 return -EINVAL;
3338
e51060f0 3339 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 3340 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
e51060f0
SH		 3341 return -EINVAL;
3342
e368d23f 3343 cma_id_get(id_priv);
fe53ba2f 3344 if (rdma_cap_ib_sa(id->device, id->port_num))
c72f2189 3345 ret = cma_resolve_ib_route(id_priv, timeout_ms);
fc008bdb 3346 else if (rdma_protocol_roce(id->device, id->port_num)) {
c72f2189 3347 ret = cma_resolve_iboe_route(id_priv);
fc008bdb
PH		 3348 if (!ret)
3349 cma_add_id_to_tree(id_priv);
3350 }
c72f2189 3351 else if (rdma_protocol_iwarp(id->device, id->port_num))
d6f91252 3352 ret = cma_resolve_iw_route(id_priv);
c72f2189 3353 else
e51060f0 3354 ret = -ENOSYS;
c72f2189 3355
e51060f0
SH		 3356 if (ret)
3357 goto err;
3358
3359 return 0;
3360err:
550e5ca7 3361 cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
e368d23f 3362 cma_id_put(id_priv);
e51060f0
SH		 3363 return ret;
3364}
3365EXPORT_SYMBOL(rdma_resolve_route);
3366
6a3e362d
SH		 3367static void cma_set_loopback(struct sockaddr *addr)
3368{
3369 switch (addr->sa_family) {
3370 case AF_INET:
3371 ((struct sockaddr_in *) addr)->sin_addr.s_addr = htonl(INADDR_LOOPBACK);
3372 break;
3373 case AF_INET6:
3374 ipv6_addr_set(&((struct sockaddr_in6 *) addr)->sin6_addr,
3375 0, 0, 0, htonl(1));
3376 break;
3377 default:
3378 ib_addr_set(&((struct sockaddr_ib *) addr)->sib_addr,
3379 0, 0, 0, htonl(1));
3380 break;
3381 }
3382}
3383
e51060f0
SH		 3384static int cma_bind_loopback(struct rdma_id_private *id_priv)
3385{
b0569e40 3386 struct cma_device *cma_dev, *cur_dev;
f0ee3404 3387 union ib_gid gid;
102c5ce0 3388 enum ib_port_state port_state;
cc055dd3 3389 unsigned int p;
e51060f0
SH		 3390 u16 pkey;
3391 int ret;
e51060f0 3392
b0569e40 3393 cma_dev = NULL;
e51060f0 3394 mutex_lock(&lock);
b0569e40
SH		 3395 list_for_each_entry(cur_dev, &dev_list, list) {
3396 if (cma_family(id_priv) == AF_IB &&
72219cea 3397 !rdma_cap_ib_cm(cur_dev->device, 1))
b0569e40
SH		 3398 continue;
3399
3400 if (!cma_dev)
3401 cma_dev = cur_dev;
3402
cc055dd3 3403 rdma_for_each_port (cur_dev->device, p) {
102c5ce0
JW		 3404 if (!ib_get_cached_port_state(cur_dev->device, p, &port_state) &&
3405 port_state == IB_PORT_ACTIVE) {
b0569e40
SH		 3406 cma_dev = cur_dev;
3407 goto port_found;
3408 }
3409 }
3410 }
3411
3412 if (!cma_dev) {
e82153b5
KK		 3413 ret = -ENODEV;
3414 goto out;
3415 }
e51060f0 3416
e82153b5 3417 p = 1;
e51060f0
SH		 3418
3419port_found:
1dfce294 3420 ret = rdma_query_gid(cma_dev->device, p, 0, &gid);
e51060f0
SH		 3421 if (ret)
3422 goto out;
3423
3424 ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
3425 if (ret)
3426 goto out;
3427
6f8372b6 3428 id_priv->id.route.addr.dev_addr.dev_type =
21655afc 3429 (rdma_protocol_ib(cma_dev->device, p)) ?
6f8372b6
SH		 3430 ARPHRD_INFINIBAND : ARPHRD_ETHER;
3431
3432 rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0
SH		 3433 ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
3434 id_priv->id.port_num = p;
3435 cma_attach_to_dev(id_priv, cma_dev);
cb5cd0ea 3436 rdma_restrack_add(&id_priv->res);
f4753834 3437 cma_set_loopback(cma_src_addr(id_priv));
e51060f0
SH		 3438out:
3439 mutex_unlock(&lock);
3440 return ret;
3441}
3442
3443static void addr_handler(int status, struct sockaddr *src_addr,
3444 struct rdma_dev_addr *dev_addr, void *context)
3445{
3446 struct rdma_id_private *id_priv = context;
7582df82 3447 struct rdma_cm_event event = {};
5fc01fb8
MJ		 3448 struct sockaddr *addr;
3449 struct sockaddr_storage old_addr;
e51060f0 3450
de910bd9 3451 mutex_lock(&id_priv->handler_mutex);
550e5ca7
NM		 3452 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
3453 RDMA_CM_ADDR_RESOLVED))
61a73c70 3454 goto out;
61a73c70 3455
5fc01fb8
MJ		 3456 /*
3457 * Store the previous src address, so that if we fail to acquire
3458 * matching rdma device, old address can be restored back, which helps
3459 * to cancel the cma listen operation correctly.
3460 */
3461 addr = cma_src_addr(id_priv);
3462 memcpy(&old_addr, addr, rdma_addr_size(addr));
3463 memcpy(addr, src_addr, rdma_addr_size(src_addr));
498683c6 3464 if (!status && !id_priv->cma_dev) {
ff11c6cd 3465 status = cma_acquire_dev_by_src_ip(id_priv);
498683c6
MS		 3466 if (status)
3467 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to acquire device. status %d\n",
3468 status);
cb5cd0ea 3469 rdma_restrack_add(&id_priv->res);
a6e4d254 3470 } else if (status) {
498683c6
MS		 3471 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to resolve IP. status %d\n", status);
3472 }
e51060f0
SH		 3473
3474 if (status) {
5fc01fb8
MJ		 3475 memcpy(addr, &old_addr,
3476 rdma_addr_size((struct sockaddr *)&old_addr));
550e5ca7
NM		 3477 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
3478 RDMA_CM_ADDR_BOUND))
e51060f0 3479 goto out;
a1b1b61f
SH		 3480 event.event = RDMA_CM_EVENT_ADDR_ERROR;
3481 event.status = status;
7b85627b 3482 } else
a1b1b61f 3483 event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
e51060f0 3484
ed999f82 3485 if (cma_cm_event_handler(id_priv, &event)) {
f6a9d47a 3486 destroy_id_handler_unlock(id_priv);
e51060f0
SH		 3487 return;
3488 }
3489out:
de910bd9 3490 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 3491}
3492
3493static int cma_resolve_loopback(struct rdma_id_private *id_priv)
3494{
3495 struct cma_work *work;
f0ee3404 3496 union ib_gid gid;
e51060f0
SH		 3497 int ret;
3498
3499 work = kzalloc(sizeof *work, GFP_KERNEL);
3500 if (!work)
3501 return -ENOMEM;
3502
3503 if (!id_priv->cma_dev) {
3504 ret = cma_bind_loopback(id_priv);
3505 if (ret)
3506 goto err;
3507 }
3508
6f8372b6
SH		 3509 rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
3510 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
e51060f0 3511
081ea519 3512 enqueue_resolve_addr_work(work, id_priv);
e51060f0
SH		 3513 return 0;
3514err:
3515 kfree(work);
3516 return ret;
3517}
3518
f17df3b0
SH		 3519static int cma_resolve_ib_addr(struct rdma_id_private *id_priv)
3520{
3521 struct cma_work *work;
3522 int ret;
3523
3524 work = kzalloc(sizeof *work, GFP_KERNEL);
3525 if (!work)
3526 return -ENOMEM;
3527
3528 if (!id_priv->cma_dev) {
3529 ret = cma_resolve_ib_dev(id_priv);
3530 if (ret)
3531 goto err;
3532 }
3533
3534 rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, (union ib_gid *)
3535 &(((struct sockaddr_ib *) &id_priv->id.route.addr.dst_addr)->sib_addr));
3536
081ea519 3537 enqueue_resolve_addr_work(work, id_priv);
f17df3b0
SH		 3538 return 0;
3539err:
3540 kfree(work);
3541 return ret;
3542}
3543
e51060f0 3544static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
2df7dba8 3545 const struct sockaddr *dst_addr)
e51060f0 3546{
22e9f710
JG		 3547 struct sockaddr_storage zero_sock = {};
3548
3549 if (src_addr && src_addr->sa_family)
3550 return rdma_bind_addr(id, src_addr);
3551
3552 /*
3553 * When the src_addr is not specified, automatically supply an any addr
3554 */
3555 zero_sock.ss_family = dst_addr->sa_family;
3556 if (IS_ENABLED(CONFIG_IPV6) && dst_addr->sa_family == AF_INET6) {
3557 struct sockaddr_in6 *src_addr6 =
3558 (struct sockaddr_in6 *)&zero_sock;
3559 struct sockaddr_in6 *dst_addr6 =
3560 (struct sockaddr_in6 *)dst_addr;
3561
3562 src_addr6->sin6_scope_id = dst_addr6->sin6_scope_id;
3563 if (ipv6_addr_type(&dst_addr6->sin6_addr) & IPV6_ADDR_LINKLOCAL)
3564 id->route.addr.dev_addr.bound_dev_if =
3565 dst_addr6->sin6_scope_id;
3566 } else if (dst_addr->sa_family == AF_IB) {
3567 ((struct sockaddr_ib *)&zero_sock)->sib_pkey =
3568 ((struct sockaddr_ib *)dst_addr)->sib_pkey;
3569 }
3570 return rdma_bind_addr(id, (struct sockaddr *)&zero_sock);
e51060f0
SH		 3571}
3572
732d41c5
JG		 3573/*
3574 * If required, resolve the source address for bind and leave the id_priv in
3575 * state RDMA_CM_ADDR_BOUND. This oddly uses the state to determine the prior
3576 * calls made by ULP, a previously bound ID will not be re-bound and src_addr is
3577 * ignored.
3578 */
3579static int resolve_prepare_src(struct rdma_id_private *id_priv,
3580 struct sockaddr *src_addr,
3581 const struct sockaddr *dst_addr)
e51060f0 3582{
e51060f0
SH		 3583 int ret;
3584
e4103312 3585 memcpy(cma_dst_addr(id_priv), dst_addr, rdma_addr_size(dst_addr));
732d41c5
JG		 3586 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY)) {
3587 /* For a well behaved ULP state will be RDMA_CM_IDLE */
3588 ret = cma_bind_addr(&id_priv->id, src_addr, dst_addr);
3589 if (ret)
3590 goto err_dst;
3591 if (WARN_ON(!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND,
3592 RDMA_CM_ADDR_QUERY))) {
3593 ret = -EINVAL;
3594 goto err_dst;
e4103312 3595 }
e51060f0
SH		 3596 }
3597
e4103312 3598 if (cma_family(id_priv) != dst_addr->sa_family) {
732d41c5
JG		 3599 ret = -EINVAL;
3600 goto err_state;
e4103312 3601 }
732d41c5 3602 return 0;
4ae7152e 3603
732d41c5
JG		 3604err_state:
3605 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
3606err_dst:
3607 memset(cma_dst_addr(id_priv), 0, rdma_addr_size(dst_addr));
3608 return ret;
3609}
3610
3611int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
3612 const struct sockaddr *dst_addr, unsigned long timeout_ms)
3613{
3614 struct rdma_id_private *id_priv =
3615 container_of(id, struct rdma_id_private, id);
3616 int ret;
3617
3618 ret = resolve_prepare_src(id_priv, src_addr, dst_addr);
3619 if (ret)
3620 return ret;
e51060f0 3621
f17df3b0 3622 if (cma_any_addr(dst_addr)) {
e51060f0 3623 ret = cma_resolve_loopback(id_priv);
f17df3b0
SH		 3624 } else {
3625 if (dst_addr->sa_family == AF_IB) {
3626 ret = cma_resolve_ib_addr(id_priv);
3627 } else {
305d568b
JG		 3628 /*
3629 * The FSM can return back to RDMA_CM_ADDR_BOUND after
3630 * rdma_resolve_ip() is called, eg through the error
3631 * path in addr_handler(). If this happens the existing
3632 * request must be canceled before issuing a new one.
3633 * Since canceling a request is a bit slow and this
3634 * oddball path is rare, keep track once a request has
3635 * been issued. The track turns out to be a permanent
3636 * state since this is the only cancel as it is
3637 * immediately before rdma_resolve_ip().
3638 */
3639 if (id_priv->used_resolve_ip)
3640 rdma_addr_cancel(&id->route.addr.dev_addr);
3641 else
3642 id_priv->used_resolve_ip = 1;
0e9d2c19
PP		 3643 ret = rdma_resolve_ip(cma_src_addr(id_priv), dst_addr,
3644 &id->route.addr.dev_addr,
3645 timeout_ms, addr_handler,
3646 false, id_priv);
f17df3b0
SH		 3647 }
3648 }
e51060f0
SH		 3649 if (ret)
3650 goto err;
3651
3652 return 0;
3653err:
550e5ca7 3654 cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
e51060f0
SH		 3655 return ret;
3656}
3657EXPORT_SYMBOL(rdma_resolve_addr);
3658
a9bb7912
HS		 3659int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
3660{
3661 struct rdma_id_private *id_priv;
3662 unsigned long flags;
3663 int ret;
3664
3665 id_priv = container_of(id, struct rdma_id_private, id);
3666 spin_lock_irqsave(&id_priv->lock, flags);
d490ee52
JG		 3667 if ((reuse && id_priv->state != RDMA_CM_LISTEN) ||
3668 id_priv->state == RDMA_CM_IDLE) {
a9bb7912
HS		 3669 id_priv->reuseaddr = reuse;
3670 ret = 0;
3671 } else {
3672 ret = -EINVAL;
3673 }
3674 spin_unlock_irqrestore(&id_priv->lock, flags);
3675 return ret;
3676}
3677EXPORT_SYMBOL(rdma_set_reuseaddr);
3678
68602120
SH		 3679int rdma_set_afonly(struct rdma_cm_id *id, int afonly)
3680{
3681 struct rdma_id_private *id_priv;
3682 unsigned long flags;
3683 int ret;
3684
3685 id_priv = container_of(id, struct rdma_id_private, id);
3686 spin_lock_irqsave(&id_priv->lock, flags);
3687 if (id_priv->state == RDMA_CM_IDLE || id_priv->state == RDMA_CM_ADDR_BOUND) {
3688 id_priv->options |= (1 << CMA_OPTION_AFONLY);
3689 id_priv->afonly = afonly;
3690 ret = 0;
3691 } else {
3692 ret = -EINVAL;
3693 }
3694 spin_unlock_irqrestore(&id_priv->lock, flags);
3695 return ret;
3696}
3697EXPORT_SYMBOL(rdma_set_afonly);
3698
e51060f0
SH		 3699static void cma_bind_port(struct rdma_bind_list *bind_list,
3700 struct rdma_id_private *id_priv)
3701{
58afdcb7
SH		 3702 struct sockaddr *addr;
3703 struct sockaddr_ib *sib;
3704 u64 sid, mask;
3705 __be16 port;
e51060f0 3706
730c8912
MZ		 3707 lockdep_assert_held(&lock);
3708
f4753834 3709 addr = cma_src_addr(id_priv);
58afdcb7
SH		 3710 port = htons(bind_list->port);
3711
3712 switch (addr->sa_family) {
3713 case AF_INET:
3714 ((struct sockaddr_in *) addr)->sin_port = port;
3715 break;
3716 case AF_INET6:
3717 ((struct sockaddr_in6 *) addr)->sin6_port = port;
3718 break;
3719 case AF_IB:
3720 sib = (struct sockaddr_ib *) addr;
3721 sid = be64_to_cpu(sib->sib_sid);
3722 mask = be64_to_cpu(sib->sib_sid_mask);
3723 sib->sib_sid = cpu_to_be64((sid & mask) | (u64) ntohs(port));
3724 sib->sib_sid_mask = cpu_to_be64(~0ULL);
3725 break;
3726 }
e51060f0
SH		 3727 id_priv->bind_list = bind_list;
3728 hlist_add_head(&id_priv->node, &bind_list->owners);
3729}
3730
2253fc0c 3731static int cma_alloc_port(enum rdma_ucm_port_space ps,
aac978e1 3732 struct rdma_id_private *id_priv, unsigned short snum)
e51060f0
SH		 3733{
3734 struct rdma_bind_list *bind_list;
3b069c5d 3735 int ret;
e51060f0 3736
730c8912
MZ		 3737 lockdep_assert_held(&lock);
3738
cb164b8c 3739 bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
e51060f0
SH		 3740 if (!bind_list)
3741 return -ENOMEM;
3742
fa20105e
GS		 3743 ret = cma_ps_alloc(id_priv->id.route.addr.dev_addr.net, ps, bind_list,
3744 snum);
3b069c5d
TH		 3745 if (ret < 0)
3746 goto err;
aedec080
SH		 3747
3748 bind_list->ps = ps;
061ccb52 3749 bind_list->port = snum;
aedec080
SH		 3750 cma_bind_port(bind_list, id_priv);
3751 return 0;
3b069c5d 3752err:
aedec080 3753 kfree(bind_list);
3b069c5d 3754 return ret == -ENOSPC ? -EADDRNOTAVAIL : ret;
aedec080 3755}
e51060f0 3756
19b752a1
MS		 3757static int cma_port_is_unique(struct rdma_bind_list *bind_list,
3758 struct rdma_id_private *id_priv)
3759{
3760 struct rdma_id_private *cur_id;
3761 struct sockaddr *daddr = cma_dst_addr(id_priv);
3762 struct sockaddr *saddr = cma_src_addr(id_priv);
3763 __be16 dport = cma_port(daddr);
3764
730c8912
MZ		 3765 lockdep_assert_held(&lock);
3766
19b752a1
MS		 3767 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
3768 struct sockaddr *cur_daddr = cma_dst_addr(cur_id);
3769 struct sockaddr *cur_saddr = cma_src_addr(cur_id);
3770 __be16 cur_dport = cma_port(cur_daddr);
3771
3772 if (id_priv == cur_id)
3773 continue;
3774
3775 /* different dest port -> unique */
9dea9a2f
TN		 3776 if (!cma_any_port(daddr) &&
3777 !cma_any_port(cur_daddr) &&
19b752a1
MS		 3778 (dport != cur_dport))
3779 continue;
3780
3781 /* different src address -> unique */
3782 if (!cma_any_addr(saddr) &&
3783 !cma_any_addr(cur_saddr) &&
3784 cma_addr_cmp(saddr, cur_saddr))
3785 continue;
3786
3787 /* different dst address -> unique */
9dea9a2f
TN		 3788 if (!cma_any_addr(daddr) &&
3789 !cma_any_addr(cur_daddr) &&
19b752a1
MS		 3790 cma_addr_cmp(daddr, cur_daddr))
3791 continue;
3792
3793 return -EADDRNOTAVAIL;
3794 }
3795 return 0;
3796}
3797
2253fc0c 3798static int cma_alloc_any_port(enum rdma_ucm_port_space ps,
aac978e1 3799 struct rdma_id_private *id_priv)
aedec080 3800{
5d7220e8
TH		 3801 static unsigned int last_used_port;
3802 int low, high, remaining;
3803 unsigned int rover;
fa20105e 3804 struct net *net = id_priv->id.route.addr.dev_addr.net;
e51060f0 3805
730c8912
MZ		 3806 lockdep_assert_held(&lock);
3807
fa20105e 3808 inet_get_local_port_range(net, &low, &high);
5d7220e8 3809 remaining = (high - low) + 1;
8032bf12 3810 rover = get_random_u32_below(remaining) + low;
5d7220e8 3811retry:
19b752a1
MS		 3812 if (last_used_port != rover) {
3813 struct rdma_bind_list *bind_list;
3814 int ret;
3815
3816 bind_list = cma_ps_find(net, ps, (unsigned short)rover);
3817
3818 if (!bind_list) {
3819 ret = cma_alloc_port(ps, id_priv, rover);
3820 } else {
3821 ret = cma_port_is_unique(bind_list, id_priv);
3822 if (!ret)
3823 cma_bind_port(bind_list, id_priv);
3824 }
5d7220e8
TH		 3825 /*
3826 * Remember previously used port number in order to avoid
3827 * re-using same port immediately after it is closed.
3828 */
3829 if (!ret)
3830 last_used_port = rover;
3831 if (ret != -EADDRNOTAVAIL)
3832 return ret;
e51060f0 3833 }
5d7220e8
TH		 3834 if (--remaining) {
3835 rover++;
3836 if ((rover < low) || (rover > high))
3837 rover = low;
3838 goto retry;
3839 }
3840 return -EADDRNOTAVAIL;
e51060f0
SH		 3841}
3842
a9bb7912
HS		 3843/*
3844 * Check that the requested port is available. This is called when trying to
3845 * bind to a specific port, or when trying to listen on a bound port. In
3846 * the latter case, the provided id_priv may already be on the bind_list, but
3847 * we still need to check that it's okay to start listening.
3848 */
3849static int cma_check_port(struct rdma_bind_list *bind_list,
3850 struct rdma_id_private *id_priv, uint8_t reuseaddr)
e51060f0
SH		 3851{
3852 struct rdma_id_private *cur_id;
43b752da 3853 struct sockaddr *addr, *cur_addr;
e51060f0 3854
730c8912
MZ		 3855 lockdep_assert_held(&lock);
3856
f4753834 3857 addr = cma_src_addr(id_priv);
b67bfe0d 3858 hlist_for_each_entry(cur_id, &bind_list->owners, node) {
a9bb7912
HS		 3859 if (id_priv == cur_id)
3860 continue;
3cd96564 3861
d490ee52 3862 if (reuseaddr && cur_id->reuseaddr)
5b0ec991 3863 continue;
e51060f0 3864
f4753834 3865 cur_addr = cma_src_addr(cur_id);
5b0ec991
SH		 3866 if (id_priv->afonly && cur_id->afonly &&
3867 (addr->sa_family != cur_addr->sa_family))
3868 continue;
3869
3870 if (cma_any_addr(addr) || cma_any_addr(cur_addr))
3871 return -EADDRNOTAVAIL;
3872
3873 if (!cma_addr_cmp(addr, cur_addr))
3874 return -EADDRINUSE;
a9bb7912 3875 }
e51060f0
SH		 3876 return 0;
3877}
3878
2253fc0c 3879static int cma_use_port(enum rdma_ucm_port_space ps,
aac978e1 3880 struct rdma_id_private *id_priv)
a9bb7912
HS		 3881{
3882 struct rdma_bind_list *bind_list;
3883 unsigned short snum;
3884 int ret;
3885
730c8912
MZ		 3886 lockdep_assert_held(&lock);
3887
f4753834 3888 snum = ntohs(cma_port(cma_src_addr(id_priv)));
a9bb7912
HS		 3889 if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
3890 return -EACCES;
3891
fa20105e 3892 bind_list = cma_ps_find(id_priv->id.route.addr.dev_addr.net, ps, snum);
a9bb7912
HS		 3893 if (!bind_list) {
3894 ret = cma_alloc_port(ps, id_priv, snum);
3895 } else {
3896 ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
3897 if (!ret)
3898 cma_bind_port(bind_list, id_priv);
3899 }
3900 return ret;
3901}
3902
2253fc0c
SW		 3903static enum rdma_ucm_port_space
3904cma_select_inet_ps(struct rdma_id_private *id_priv)
e51060f0 3905{
e51060f0 3906 switch (id_priv->id.ps) {
e51060f0 3907 case RDMA_PS_TCP:
628e5f6d 3908 case RDMA_PS_UDP:
c8f6a362 3909 case RDMA_PS_IPOIB:
2d2e9415 3910 case RDMA_PS_IB:
aac978e1 3911 return id_priv->id.ps;
e51060f0 3912 default:
aac978e1
HE		 3913
3914 return 0;
58afdcb7
SH		 3915 }
3916}
3917
2253fc0c
SW		 3918static enum rdma_ucm_port_space
3919cma_select_ib_ps(struct rdma_id_private *id_priv)
58afdcb7 3920{
2253fc0c 3921 enum rdma_ucm_port_space ps = 0;
58afdcb7
SH		 3922 struct sockaddr_ib *sib;
3923 u64 sid_ps, mask, sid;
3924
f4753834 3925 sib = (struct sockaddr_ib *) cma_src_addr(id_priv);
58afdcb7
SH		 3926 mask = be64_to_cpu(sib->sib_sid_mask) & RDMA_IB_IP_PS_MASK;
3927 sid = be64_to_cpu(sib->sib_sid) & mask;
3928
3929 if ((id_priv->id.ps == RDMA_PS_IB) && (sid == (RDMA_IB_IP_PS_IB & mask))) {
3930 sid_ps = RDMA_IB_IP_PS_IB;
aac978e1 3931 ps = RDMA_PS_IB;
58afdcb7
SH		 3932 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_TCP)) &&
3933 (sid == (RDMA_IB_IP_PS_TCP & mask))) {
3934 sid_ps = RDMA_IB_IP_PS_TCP;
aac978e1 3935 ps = RDMA_PS_TCP;
58afdcb7
SH		 3936 } else if (((id_priv->id.ps == RDMA_PS_IB) || (id_priv->id.ps == RDMA_PS_UDP)) &&
3937 (sid == (RDMA_IB_IP_PS_UDP & mask))) {
3938 sid_ps = RDMA_IB_IP_PS_UDP;
aac978e1 3939 ps = RDMA_PS_UDP;
e51060f0
SH		 3940 }
3941
58afdcb7
SH		 3942 if (ps) {
3943 sib->sib_sid = cpu_to_be64(sid_ps | ntohs(cma_port((struct sockaddr *) sib)));
3944 sib->sib_sid_mask = cpu_to_be64(RDMA_IB_IP_PS_MASK |
3945 be64_to_cpu(sib->sib_sid_mask));
3946 }
3947 return ps;
3948}
3949
3950static int cma_get_port(struct rdma_id_private *id_priv)
3951{
2253fc0c 3952 enum rdma_ucm_port_space ps;
58afdcb7
SH		 3953 int ret;
3954
f4753834 3955 if (cma_family(id_priv) != AF_IB)
58afdcb7
SH		 3956 ps = cma_select_inet_ps(id_priv);
3957 else
3958 ps = cma_select_ib_ps(id_priv);
3959 if (!ps)
3960 return -EPROTONOSUPPORT;
3961
e51060f0 3962 mutex_lock(&lock);
f4753834 3963 if (cma_any_port(cma_src_addr(id_priv)))
aedec080 3964 ret = cma_alloc_any_port(ps, id_priv);
e51060f0
SH		 3965 else
3966 ret = cma_use_port(ps, id_priv);
3967 mutex_unlock(&lock);
3968
3969 return ret;
3970}
3971
d14714df
SH		 3972static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
3973 struct sockaddr *addr)
3974{
d90f9b35 3975#if IS_ENABLED(CONFIG_IPV6)
d14714df
SH		 3976 struct sockaddr_in6 *sin6;
3977
3978 if (addr->sa_family != AF_INET6)
3979 return 0;
3980
3981 sin6 = (struct sockaddr_in6 *) addr;
5462eddd
SK		 3982
3983 if (!(ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL))
3984 return 0;
3985
3986 if (!sin6->sin6_scope_id)
d14714df
SH		 3987 return -EINVAL;
3988
3989 dev_addr->bound_dev_if = sin6->sin6_scope_id;
3990#endif
3991 return 0;
3992}
3993
a9bb7912
HS		 3994int rdma_listen(struct rdma_cm_id *id, int backlog)
3995{
732d41c5
JG		 3996 struct rdma_id_private *id_priv =
3997 container_of(id, struct rdma_id_private, id);
a9bb7912
HS		 3998 int ret;
3999
732d41c5 4000 if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN)) {
bc0bdc5a
JG		 4001 struct sockaddr_in any_in = {
4002 .sin_family = AF_INET,
4003 .sin_addr.s_addr = htonl(INADDR_ANY),
4004 };
4005
732d41c5 4006 /* For a well behaved ULP state will be RDMA_CM_IDLE */
bc0bdc5a 4007 ret = rdma_bind_addr(id, (struct sockaddr *)&any_in);
a9bb7912
HS		 4008 if (ret)
4009 return ret;
732d41c5
JG		 4010 if (WARN_ON(!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND,
4011 RDMA_CM_LISTEN)))
4012 return -EINVAL;
a9bb7912
HS		 4013 }
4014
d490ee52
JG		 4015 /*
4016 * Once the ID reaches RDMA_CM_LISTEN it is not allowed to be reusable
4017 * any more, and has to be unique in the bind list.
4018 */
a9bb7912 4019 if (id_priv->reuseaddr) {
d490ee52
JG		 4020 mutex_lock(&lock);
4021 ret = cma_check_port(id_priv->bind_list, id_priv, 0);
4022 if (!ret)
4023 id_priv->reuseaddr = 0;
4024 mutex_unlock(&lock);
a9bb7912
HS		 4025 if (ret)
4026 goto err;
4027 }
4028
4029 id_priv->backlog = backlog;
889d916b 4030 if (id_priv->cma_dev) {
72219cea 4031 if (rdma_cap_ib_cm(id->device, 1)) {
a9bb7912
HS		 4032 ret = cma_ib_listen(id_priv);
4033 if (ret)
4034 goto err;
04215330 4035 } else if (rdma_cap_iw_cm(id->device, 1)) {
a9bb7912
HS		 4036 ret = cma_iw_listen(id_priv, backlog);
4037 if (ret)
4038 goto err;
21655afc 4039 } else {
a9bb7912
HS		 4040 ret = -ENOSYS;
4041 goto err;
4042 }
c80a0c52
LR		 4043 } else {
4044 ret = cma_listen_on_all(id_priv);
4045 if (ret)
4046 goto err;
4047 }
a9bb7912
HS		 4048
4049 return 0;
4050err:
4051 id_priv->backlog = 0;
d490ee52
JG		 4052 /*
4053 * All the failure paths that lead here will not allow the req_handler's
4054 * to have run.
4055 */
550e5ca7 4056 cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
a9bb7912
HS		 4057 return ret;
4058}
4059EXPORT_SYMBOL(rdma_listen);
4060
e51060f0
SH		 4061int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
4062{
4063 struct rdma_id_private *id_priv;
4064 int ret;
6df6b4a9 4065 struct sockaddr *daddr;
e51060f0 4066
680f920a
SH		 4067 if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6 &&
4068 addr->sa_family != AF_IB)
e51060f0
SH		 4069 return -EAFNOSUPPORT;
4070
4071 id_priv = container_of(id, struct rdma_id_private, id);
550e5ca7 4072 if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
e51060f0
SH		 4073 return -EINVAL;
4074
d14714df
SH		 4075 ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
4076 if (ret)
4077 goto err1;
4078
7b85627b 4079 memcpy(cma_src_addr(id_priv), addr, rdma_addr_size(addr));
8523c048 4080 if (!cma_any_addr(addr)) {
680f920a 4081 ret = cma_translate_addr(addr, &id->route.addr.dev_addr);
e51060f0 4082 if (ret)
255d0c14
KK		 4083 goto err1;
4084
ff11c6cd 4085 ret = cma_acquire_dev_by_src_ip(id_priv);
255d0c14
KK		 4086 if (ret)
4087 goto err1;
e51060f0
SH		 4088 }
4089
68602120
SH		 4090 if (!(id_priv->options & (1 << CMA_OPTION_AFONLY))) {
4091 if (addr->sa_family == AF_INET)
4092 id_priv->afonly = 1;
5b0ec991 4093#if IS_ENABLED(CONFIG_IPV6)
fa20105e
GS		 4094 else if (addr->sa_family == AF_INET6) {
4095 struct net *net = id_priv->id.route.addr.dev_addr.net;
4096
4097 id_priv->afonly = net->ipv6.sysctl.bindv6only;
4098 }
5b0ec991 4099#endif
68602120 4100 }
9dea9a2f
TN		 4101 daddr = cma_dst_addr(id_priv);
4102 daddr->sa_family = addr->sa_family;
4103
e51060f0
SH		 4104 ret = cma_get_port(id_priv);
4105 if (ret)
255d0c14 4106 goto err2;
e51060f0 4107
cb5cd0ea
SD		 4108 if (!cma_any_addr(addr))
4109 rdma_restrack_add(&id_priv->res);
e51060f0 4110 return 0;
255d0c14 4111err2:
ed7a01fd 4112 if (id_priv->cma_dev)
a396d43a 4113 cma_release_dev(id_priv);
255d0c14 4114err1:
550e5ca7 4115 cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
e51060f0
SH		 4116 return ret;
4117}
4118EXPORT_SYMBOL(rdma_bind_addr);
4119
f4753834 4120static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv)
e51060f0 4121{
e51060f0 4122 struct cma_hdr *cma_hdr;
e51060f0 4123
01602f11
SH		 4124 cma_hdr = hdr;
4125 cma_hdr->cma_version = CMA_VERSION;
f4753834 4126 if (cma_family(id_priv) == AF_INET) {
1f5175ad
AS		 4127 struct sockaddr_in *src4, *dst4;
4128
f4753834
SH		 4129 src4 = (struct sockaddr_in *) cma_src_addr(id_priv);
4130 dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv);
1f5175ad 4131
01602f11
SH		 4132 cma_set_ip_ver(cma_hdr, 4);
4133 cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
4134 cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
4135 cma_hdr->port = src4->sin_port;
e8160e15 4136 } else if (cma_family(id_priv) == AF_INET6) {
1f5175ad
AS		 4137 struct sockaddr_in6 *src6, *dst6;
4138
f4753834
SH		 4139 src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv);
4140 dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv);
1f5175ad 4141
01602f11
SH		 4142 cma_set_ip_ver(cma_hdr, 6);
4143 cma_hdr->src_addr.ip6 = src6->sin6_addr;
4144 cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
4145 cma_hdr->port = src6->sin6_port;
e51060f0
SH		 4146 }
4147 return 0;
4148}
4149
628e5f6d 4150static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
e7ff98ae 4151 const struct ib_cm_event *ib_event)
628e5f6d
SH		 4152{
4153 struct rdma_id_private *id_priv = cm_id->context;
7582df82 4154 struct rdma_cm_event event = {};
e7ff98ae
PP		 4155 const struct ib_cm_sidr_rep_event_param *rep =
4156 &ib_event->param.sidr_rep_rcvd;
f6a9d47a 4157 int ret;
628e5f6d 4158
37e07cda 4159 mutex_lock(&id_priv->handler_mutex);
2a7cec53 4160 if (READ_ONCE(id_priv->state) != RDMA_CM_CONNECT)
37e07cda 4161 goto out;
628e5f6d
SH		 4162
4163 switch (ib_event->event) {
4164 case IB_CM_SIDR_REQ_ERROR:
4165 event.event = RDMA_CM_EVENT_UNREACHABLE;
4166 event.status = -ETIMEDOUT;
4167 break;
4168 case IB_CM_SIDR_REP_RECEIVED:
4169 event.param.ud.private_data = ib_event->private_data;
4170 event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
4171 if (rep->status != IB_SIDR_SUCCESS) {
4172 event.event = RDMA_CM_EVENT_UNREACHABLE;
4173 event.status = ib_event->param.sidr_rep_rcvd.status;
498683c6
MS		 4174 pr_debug_ratelimited("RDMA CM: UNREACHABLE: bad SIDR reply. status %d\n",
4175 event.status);
628e5f6d
SH		 4176 break;
4177 }
5c438135 4178 ret = cma_set_qkey(id_priv, rep->qkey);
d2ca39f2 4179 if (ret) {
498683c6 4180 pr_debug_ratelimited("RDMA CM: ADDR_ERROR: failed to set qkey. status %d\n", ret);
d2ca39f2 4181 event.event = RDMA_CM_EVENT_ADDR_ERROR;
5c438135 4182 event.status = ret;
628e5f6d
SH		 4183 break;
4184 }
4ad6a024
PP		 4185 ib_init_ah_attr_from_path(id_priv->id.device,
4186 id_priv->id.port_num,
4187 id_priv->id.route.path_rec,
39839107
PP		 4188 &event.param.ud.ah_attr,
4189 rep->sgid_attr);
628e5f6d
SH		 4190 event.param.ud.qp_num = rep->qpn;
4191 event.param.ud.qkey = rep->qkey;
4192 event.event = RDMA_CM_EVENT_ESTABLISHED;
4193 event.status = 0;
4194 break;
4195 default:
aba25a3e 4196 pr_err("RDMA CMA: unexpected IB CM event: %d\n",
628e5f6d
SH		 4197 ib_event->event);
4198 goto out;
4199 }
4200
ed999f82 4201 ret = cma_cm_event_handler(id_priv, &event);
aa74f487
PP		 4202
4203 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
628e5f6d
SH		 4204 if (ret) {
4205 /* Destroy the CM ID by returning a non-zero value. */
4206 id_priv->cm_id.ib = NULL;
f6a9d47a 4207 destroy_id_handler_unlock(id_priv);
628e5f6d
SH		 4208 return ret;
4209 }
4210out:
de910bd9 4211 mutex_unlock(&id_priv->handler_mutex);
f6a9d47a 4212 return 0;
628e5f6d
SH		 4213}
4214
4215static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
4216 struct rdma_conn_param *conn_param)
4217{
4218 struct ib_cm_sidr_req_param req;
0c9361fc 4219 struct ib_cm_id *id;
e511d1ae 4220 void *private_data;
c0b64f58
BVA		 4221 u8 offset;
4222 int ret;
628e5f6d 4223
e511d1ae 4224 memset(&req, 0, sizeof req);
e8160e15 4225 offset = cma_user_data_offset(id_priv);
8d0d2b0f 4226 if (check_add_overflow(offset, conn_param->private_data_len, &req.private_data_len))
04ded167
SH		 4227 return -EINVAL;
4228
e8160e15 4229 if (req.private_data_len) {
e511d1ae
SH		 4230 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
4231 if (!private_data)
e8160e15
SH		 4232 return -ENOMEM;
4233 } else {
e511d1ae 4234 private_data = NULL;
e8160e15 4235 }
628e5f6d
SH		 4236
4237 if (conn_param->private_data && conn_param->private_data_len)
e511d1ae
SH		 4238 memcpy(private_data + offset, conn_param->private_data,
4239 conn_param->private_data_len);
628e5f6d 4240
e511d1ae
SH		 4241 if (private_data) {
4242 ret = cma_format_hdr(private_data, id_priv);
e8160e15
SH		 4243 if (ret)
4244 goto out;
e511d1ae 4245 req.private_data = private_data;
e8160e15 4246 }
628e5f6d 4247
0c9361fc
JM		 4248 id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
4249 id_priv);
4250 if (IS_ERR(id)) {
4251 ret = PTR_ERR(id);
628e5f6d
SH		 4252 goto out;
4253 }
0c9361fc 4254 id_priv->cm_id.ib = id;
628e5f6d 4255
f4753834 4256 req.path = id_priv->id.route.path_rec;
815d456e 4257 req.sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
cf53936f 4258 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
628e5f6d
SH		 4259 req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
4260 req.max_cm_retries = CMA_MAX_CM_RETRIES;
4261
ed999f82 4262 trace_cm_send_sidr_req(id_priv);
628e5f6d
SH		 4263 ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
4264 if (ret) {
4265 ib_destroy_cm_id(id_priv->cm_id.ib);
4266 id_priv->cm_id.ib = NULL;
4267 }
4268out:
e511d1ae 4269 kfree(private_data);
628e5f6d
SH		 4270 return ret;
4271}
4272
e51060f0
SH		 4273static int cma_connect_ib(struct rdma_id_private *id_priv,
4274 struct rdma_conn_param *conn_param)
4275{
4276 struct ib_cm_req_param req;
4277 struct rdma_route *route;
4278 void *private_data;
0c9361fc 4279 struct ib_cm_id *id;
c0b64f58
BVA		 4280 u8 offset;
4281 int ret;
e51060f0
SH		 4282
4283 memset(&req, 0, sizeof req);
e8160e15 4284 offset = cma_user_data_offset(id_priv);
8d0d2b0f 4285 if (check_add_overflow(offset, conn_param->private_data_len, &req.private_data_len))
04ded167
SH		 4286 return -EINVAL;
4287
e8160e15
SH		 4288 if (req.private_data_len) {
4289 private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
4290 if (!private_data)
4291 return -ENOMEM;
4292 } else {
4293 private_data = NULL;
4294 }
e51060f0
SH		 4295
4296 if (conn_param->private_data && conn_param->private_data_len)
4297 memcpy(private_data + offset, conn_param->private_data,
4298 conn_param->private_data_len);
4299
0c9361fc
JM		 4300 id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
4301 if (IS_ERR(id)) {
4302 ret = PTR_ERR(id);
e51060f0
SH		 4303 goto out;
4304 }
0c9361fc 4305 id_priv->cm_id.ib = id;
e51060f0
SH		 4306
4307 route = &id_priv->id.route;
e8160e15
SH		 4308 if (private_data) {
4309 ret = cma_format_hdr(private_data, id_priv);
4310 if (ret)
4311 goto out;
4312 req.private_data = private_data;
4313 }
e51060f0
SH		 4314
4315 req.primary_path = &route->path_rec[0];
eb8336db
MZ		 4316 req.primary_path_inbound = route->path_rec_inbound;
4317 req.primary_path_outbound = route->path_rec_outbound;
bf9a9928 4318 if (route->num_pri_alt_paths == 2)
e51060f0
SH		 4319 req.alternate_path = &route->path_rec[1];
4320
815d456e
PP		 4321 req.ppath_sgid_attr = id_priv->id.route.addr.dev_addr.sgid_attr;
4322 /* Alternate path SGID attribute currently unsupported */
cf53936f 4323 req.service_id = rdma_get_service_id(&id_priv->id, cma_dst_addr(id_priv));
e51060f0 4324 req.qp_num = id_priv->qp_num;
18c441a6 4325 req.qp_type = id_priv->id.qp_type;
e51060f0
SH		 4326 req.starting_psn = id_priv->seq_num;
4327 req.responder_resources = conn_param->responder_resources;
4328 req.initiator_depth = conn_param->initiator_depth;
4329 req.flow_control = conn_param->flow_control;
4ede178a
SH		 4330 req.retry_count = min_t(u8, 7, conn_param->retry_count);
4331 req.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0
SH		 4332 req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
4333 req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
4334 req.max_cm_retries = CMA_MAX_CM_RETRIES;
4335 req.srq = id_priv->srq ? 1 : 0;
a20652e1
LR		 4336 req.ece.vendor_id = id_priv->ece.vendor_id;
4337 req.ece.attr_mod = id_priv->ece.attr_mod;
e51060f0 4338
ed999f82 4339 trace_cm_send_req(id_priv);
e51060f0
SH		 4340 ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
4341out:
0c9361fc
JM		 4342 if (ret && !IS_ERR(id)) {
4343 ib_destroy_cm_id(id);
675a027c
KK		 4344 id_priv->cm_id.ib = NULL;
4345 }
4346
e51060f0
SH		 4347 kfree(private_data);
4348 return ret;
4349}
4350
07ebafba
TT		 4351static int cma_connect_iw(struct rdma_id_private *id_priv,
4352 struct rdma_conn_param *conn_param)
4353{
4354 struct iw_cm_id *cm_id;
07ebafba
TT		 4355 int ret;
4356 struct iw_cm_conn_param iw_param;
4357
4358 cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
0c9361fc
JM		 4359 if (IS_ERR(cm_id))
4360 return PTR_ERR(cm_id);
07ebafba 4361
ca0c448d 4362 mutex_lock(&id_priv->qp_mutex);
68cdba06 4363 cm_id->tos = id_priv->tos;
926ba19b 4364 cm_id->tos_set = id_priv->tos_set;
ca0c448d
HB		 4365 mutex_unlock(&id_priv->qp_mutex);
4366
07ebafba
TT		 4367 id_priv->cm_id.iw = cm_id;
4368
24d44a39
SW		 4369 memcpy(&cm_id->local_addr, cma_src_addr(id_priv),
4370 rdma_addr_size(cma_src_addr(id_priv)));
4371 memcpy(&cm_id->remote_addr, cma_dst_addr(id_priv),
4372 rdma_addr_size(cma_dst_addr(id_priv)));
07ebafba 4373
5851bb89 4374 ret = cma_modify_qp_rtr(id_priv, conn_param);
675a027c
KK		 4375 if (ret)
4376 goto out;
07ebafba 4377
f45ee80e
HS		 4378 if (conn_param) {
4379 iw_param.ord = conn_param->initiator_depth;
4380 iw_param.ird = conn_param->responder_resources;
4381 iw_param.private_data = conn_param->private_data;
4382 iw_param.private_data_len = conn_param->private_data_len;
4383 iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
4384 } else {
4385 memset(&iw_param, 0, sizeof iw_param);
07ebafba 4386 iw_param.qpn = id_priv->qp_num;
f45ee80e 4387 }
07ebafba
TT		 4388 ret = iw_cm_connect(cm_id, &iw_param);
4389out:
0c9361fc 4390 if (ret) {
675a027c
KK		 4391 iw_destroy_cm_id(cm_id);
4392 id_priv->cm_id.iw = NULL;
4393 }
07ebafba
TT		 4394 return ret;
4395}
4396
071ba4cc
JG		 4397/**
4398 * rdma_connect_locked - Initiate an active connection request.
4399 * @id: Connection identifier to connect.
4400 * @conn_param: Connection information used for connected QPs.
4401 *
4402 * Same as rdma_connect() but can only be called from the
4403 * RDMA_CM_EVENT_ROUTE_RESOLVED handler callback.
4404 */
4405int rdma_connect_locked(struct rdma_cm_id *id,
4406 struct rdma_conn_param *conn_param)
e51060f0 4407{
2a7cec53
JG		 4408 struct rdma_id_private *id_priv =
4409 container_of(id, struct rdma_id_private, id);
e51060f0
SH		 4410 int ret;
4411
071ba4cc
JG		 4412 if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
4413 return -EINVAL;
e51060f0
SH		 4414
4415 if (!id->qp) {
4416 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 4417 id_priv->srq = conn_param->srq;
4418 }
4419
72219cea 4420 if (rdma_cap_ib_cm(id->device, id->port_num)) {
b26f9b99 4421 if (id->qp_type == IB_QPT_UD)
628e5f6d
SH		 4422 ret = cma_resolve_ib_udp(id_priv, conn_param);
4423 else
4424 ret = cma_connect_ib(id_priv, conn_param);
b6eb7011 4425 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba 4426 ret = cma_connect_iw(id_priv, conn_param);
b6eb7011 4427 } else {
e51060f0 4428 ret = -ENOSYS;
b6eb7011 4429 }
e51060f0 4430 if (ret)
2a7cec53 4431 goto err_state;
e51060f0 4432 return 0;
2a7cec53 4433err_state:
550e5ca7 4434 cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
071ba4cc
JG		 4435 return ret;
4436}
4437EXPORT_SYMBOL(rdma_connect_locked);
4438
4439/**
4440 * rdma_connect - Initiate an active connection request.
4441 * @id: Connection identifier to connect.
4442 * @conn_param: Connection information used for connected QPs.
4443 *
4444 * Users must have resolved a route for the rdma_cm_id to connect with by having
4445 * called rdma_resolve_route before calling this routine.
4446 *
4447 * This call will either connect to a remote QP or obtain remote QP information
4448 * for unconnected rdma_cm_id's. The actual operation is based on the
4449 * rdma_cm_id's port space.
4450 */
4451int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
4452{
4453 struct rdma_id_private *id_priv =
4454 container_of(id, struct rdma_id_private, id);
4455 int ret;
4456
4457 mutex_lock(&id_priv->handler_mutex);
4458 ret = rdma_connect_locked(id, conn_param);
2a7cec53 4459 mutex_unlock(&id_priv->handler_mutex);
e51060f0
SH		 4460 return ret;
4461}
4462EXPORT_SYMBOL(rdma_connect);
4463
34e2ab57
LR		 4464/**
4465 * rdma_connect_ece - Initiate an active connection request with ECE data.
4466 * @id: Connection identifier to connect.
4467 * @conn_param: Connection information used for connected QPs.
4468 * @ece: ECE parameters
4469 *
4470 * See rdma_connect() explanation.
4471 */
4472int rdma_connect_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
4473 struct rdma_ucm_ece *ece)
4474{
4475 struct rdma_id_private *id_priv =
4476 container_of(id, struct rdma_id_private, id);
4477
4478 id_priv->ece.vendor_id = ece->vendor_id;
4479 id_priv->ece.attr_mod = ece->attr_mod;
4480
4481 return rdma_connect(id, conn_param);
4482}
4483EXPORT_SYMBOL(rdma_connect_ece);
4484
e51060f0
SH		 4485static int cma_accept_ib(struct rdma_id_private *id_priv,
4486 struct rdma_conn_param *conn_param)
4487{
4488 struct ib_cm_rep_param rep;
5851bb89 4489 int ret;
0fe313b0 4490
5851bb89
SH		 4491 ret = cma_modify_qp_rtr(id_priv, conn_param);
4492 if (ret)
4493 goto out;
0fe313b0 4494
5851bb89
SH		 4495 ret = cma_modify_qp_rts(id_priv, conn_param);
4496 if (ret)
4497 goto out;
e51060f0
SH		 4498
4499 memset(&rep, 0, sizeof rep);
4500 rep.qp_num = id_priv->qp_num;
4501 rep.starting_psn = id_priv->seq_num;
4502 rep.private_data = conn_param->private_data;
4503 rep.private_data_len = conn_param->private_data_len;
4504 rep.responder_resources = conn_param->responder_resources;
4505 rep.initiator_depth = conn_param->initiator_depth;
e51060f0
SH		 4506 rep.failover_accepted = 0;
4507 rep.flow_control = conn_param->flow_control;
4ede178a 4508 rep.rnr_retry_count = min_t(u8, 7, conn_param->rnr_retry_count);
e51060f0 4509 rep.srq = id_priv->srq ? 1 : 0;
0cb15372
LR		 4510 rep.ece.vendor_id = id_priv->ece.vendor_id;
4511 rep.ece.attr_mod = id_priv->ece.attr_mod;
e51060f0 4512
ed999f82 4513 trace_cm_send_rep(id_priv);
0fe313b0
SH		 4514 ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
4515out:
4516 return ret;
e51060f0
SH		 4517}
4518
07ebafba
TT		 4519static int cma_accept_iw(struct rdma_id_private *id_priv,
4520 struct rdma_conn_param *conn_param)
4521{
4522 struct iw_cm_conn_param iw_param;
4523 int ret;
4524
f2625f7d
SW		 4525 if (!conn_param)
4526 return -EINVAL;
4527
5851bb89 4528 ret = cma_modify_qp_rtr(id_priv, conn_param);
07ebafba
TT		 4529 if (ret)
4530 return ret;
4531
4532 iw_param.ord = conn_param->initiator_depth;
4533 iw_param.ird = conn_param->responder_resources;
4534 iw_param.private_data = conn_param->private_data;
4535 iw_param.private_data_len = conn_param->private_data_len;
b6eb7011 4536 if (id_priv->id.qp)
07ebafba 4537 iw_param.qpn = id_priv->qp_num;
b6eb7011 4538 else
07ebafba
TT		 4539 iw_param.qpn = conn_param->qp_num;
4540
4541 return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
4542}
4543
628e5f6d 4544static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
5c438135 4545 enum ib_cm_sidr_status status, u32 qkey,
628e5f6d
SH		 4546 const void *private_data, int private_data_len)
4547{
4548 struct ib_cm_sidr_rep_param rep;
d2ca39f2 4549 int ret;
628e5f6d
SH		 4550
4551 memset(&rep, 0, sizeof rep);
4552 rep.status = status;
4553 if (status == IB_SIDR_SUCCESS) {
5c438135 4554 ret = cma_set_qkey(id_priv, qkey);
d2ca39f2
YE		 4555 if (ret)
4556 return ret;
628e5f6d 4557 rep.qp_num = id_priv->qp_num;
c8f6a362 4558 rep.qkey = id_priv->qkey;
0cb15372
LR		 4559
4560 rep.ece.vendor_id = id_priv->ece.vendor_id;
4561 rep.ece.attr_mod = id_priv->ece.attr_mod;
628e5f6d 4562 }
0cb15372 4563
628e5f6d
SH		 4564 rep.private_data = private_data;
4565 rep.private_data_len = private_data_len;
4566
ed999f82 4567 trace_cm_send_sidr_rep(id_priv);
628e5f6d
SH		 4568 return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
4569}
4570
b09c4d70
LR		 4571/**
4572 * rdma_accept - Called to accept a connection request or response.
4573 * @id: Connection identifier associated with the request.
4574 * @conn_param: Information needed to establish the connection. This must be
4575 * provided if accepting a connection request. If accepting a connection
4576 * response, this parameter must be NULL.
4577 *
4578 * Typically, this routine is only called by the listener to accept a connection
4579 * request. It must also be called on the active side of a connection if the
4580 * user is performing their own QP transitions.
4581 *
4582 * In the case of error, a reject message is sent to the remote side and the
4583 * state of the qp associated with the id is modified to error, such that any
4584 * previously posted receive buffers would be flushed.
4585 *
4586 * This function is for use by kernel ULPs and must be called from under the
4587 * handler callback.
4588 */
4589int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
e51060f0 4590{
d114c6fe
JG		 4591 struct rdma_id_private *id_priv =
4592 container_of(id, struct rdma_id_private, id);
e51060f0
SH		 4593 int ret;
4594
d114c6fe 4595 lockdep_assert_held(&id_priv->handler_mutex);
83e9502d 4596
d114c6fe 4597 if (READ_ONCE(id_priv->state) != RDMA_CM_CONNECT)
e51060f0
SH		 4598 return -EINVAL;
4599
4600 if (!id->qp && conn_param) {
4601 id_priv->qp_num = conn_param->qp_num;
e51060f0
SH		 4602 id_priv->srq = conn_param->srq;
4603 }
4604
72219cea 4605 if (rdma_cap_ib_cm(id->device, id->port_num)) {
f45ee80e
HS		 4606 if (id->qp_type == IB_QPT_UD) {
4607 if (conn_param)
4608 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 4609 conn_param->qkey,
f45ee80e
HS		 4610 conn_param->private_data,
4611 conn_param->private_data_len);
4612 else
4613 ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
5c438135 4614 0, NULL, 0);
f45ee80e
HS		 4615 } else {
4616 if (conn_param)
4617 ret = cma_accept_ib(id_priv, conn_param);
4618 else
4619 ret = cma_rep_recv(id_priv);
4620 }
b6eb7011 4621 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba 4622 ret = cma_accept_iw(id_priv, conn_param);
b6eb7011 4623 } else {
e51060f0 4624 ret = -ENOSYS;
b6eb7011 4625 }
e51060f0
SH		 4626 if (ret)
4627 goto reject;
4628
4629 return 0;
4630reject:
c5483388 4631 cma_modify_qp_err(id_priv);
8094ba0a 4632 rdma_reject(id, NULL, 0, IB_CM_REJ_CONSUMER_DEFINED);
e51060f0
SH		 4633 return ret;
4634}
b09c4d70 4635EXPORT_SYMBOL(rdma_accept);
e51060f0 4636
b09c4d70
LR		 4637int rdma_accept_ece(struct rdma_cm_id *id, struct rdma_conn_param *conn_param,
4638 struct rdma_ucm_ece *ece)
0cb15372
LR		 4639{
4640 struct rdma_id_private *id_priv =
4641 container_of(id, struct rdma_id_private, id);
4642
4643 id_priv->ece.vendor_id = ece->vendor_id;
4644 id_priv->ece.attr_mod = ece->attr_mod;
4645
b09c4d70 4646 return rdma_accept(id, conn_param);
0cb15372 4647}
b09c4d70 4648EXPORT_SYMBOL(rdma_accept_ece);
0cb15372 4649
d114c6fe
JG		 4650void rdma_lock_handler(struct rdma_cm_id *id)
4651{
4652 struct rdma_id_private *id_priv =
4653 container_of(id, struct rdma_id_private, id);
4654
4655 mutex_lock(&id_priv->handler_mutex);
0cb15372 4656}
d114c6fe
JG		 4657EXPORT_SYMBOL(rdma_lock_handler);
4658
4659void rdma_unlock_handler(struct rdma_cm_id *id)
4660{
4661 struct rdma_id_private *id_priv =
4662 container_of(id, struct rdma_id_private, id);
4663
4664 mutex_unlock(&id_priv->handler_mutex);
4665}
4666EXPORT_SYMBOL(rdma_unlock_handler);
0cb15372 4667
0fe313b0
SH		 4668int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
4669{
4670 struct rdma_id_private *id_priv;
4671 int ret;
4672
4673 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 4674 if (!id_priv->cm_id.ib)
0fe313b0
SH		 4675 return -EINVAL;
4676
4677 switch (id->device->node_type) {
4678 case RDMA_NODE_IB_CA:
4679 ret = ib_cm_notify(id_priv->cm_id.ib, event);
4680 break;
4681 default:
4682 ret = 0;
4683 break;
4684 }
4685 return ret;
4686}
4687EXPORT_SYMBOL(rdma_notify);
4688
e51060f0 4689int rdma_reject(struct rdma_cm_id *id, const void *private_data,
8094ba0a 4690 u8 private_data_len, u8 reason)
e51060f0
SH		 4691{
4692 struct rdma_id_private *id_priv;
4693 int ret;
4694
4695 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 4696 if (!id_priv->cm_id.ib)
e51060f0
SH		 4697 return -EINVAL;
4698
72219cea 4699 if (rdma_cap_ib_cm(id->device, id->port_num)) {
ed999f82 4700 if (id->qp_type == IB_QPT_UD) {
5c438135 4701 ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT, 0,
628e5f6d 4702 private_data, private_data_len);
ed999f82
CL		 4703 } else {
4704 trace_cm_send_rej(id_priv);
8094ba0a
LR		 4705 ret = ib_send_cm_rej(id_priv->cm_id.ib, reason, NULL, 0,
4706 private_data, private_data_len);
ed999f82 4707 }
04215330 4708 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba
TT		 4709 ret = iw_cm_reject(id_priv->cm_id.iw,
4710 private_data, private_data_len);
b6eb7011 4711 } else {
e51060f0 4712 ret = -ENOSYS;
b6eb7011 4713 }
21655afc 4714
e51060f0
SH		 4715 return ret;
4716}
4717EXPORT_SYMBOL(rdma_reject);
4718
4719int rdma_disconnect(struct rdma_cm_id *id)
4720{
4721 struct rdma_id_private *id_priv;
4722 int ret;
4723
4724 id_priv = container_of(id, struct rdma_id_private, id);
0c9361fc 4725 if (!id_priv->cm_id.ib)
e51060f0
SH		 4726 return -EINVAL;
4727
72219cea 4728 if (rdma_cap_ib_cm(id->device, id->port_num)) {
c5483388 4729 ret = cma_modify_qp_err(id_priv);
07ebafba
TT		 4730 if (ret)
4731 goto out;
e51060f0 4732 /* Initiate or respond to a disconnect. */
ed999f82
CL		 4733 trace_cm_disconnect(id_priv);
4734 if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0)) {
4735 if (!ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0))
4736 trace_cm_sent_drep(id_priv);
4737 } else {
4738 trace_cm_sent_dreq(id_priv);
4739 }
04215330 4740 } else if (rdma_cap_iw_cm(id->device, id->port_num)) {
07ebafba 4741 ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
21655afc 4742 } else
07ebafba 4743 ret = -EINVAL;
21655afc 4744
e51060f0
SH		 4745out:
4746 return ret;
4747}
4748EXPORT_SYMBOL(rdma_disconnect);
4749
b5de0c60
JG		 4750static void cma_make_mc_event(int status, struct rdma_id_private *id_priv,
4751 struct ib_sa_multicast *multicast,
4752 struct rdma_cm_event *event,
4753 struct cma_multicast *mc)
c8f6a362 4754{
b5de0c60
JG		 4755 struct rdma_dev_addr *dev_addr;
4756 enum ib_gid_type gid_type;
4757 struct net_device *ndev;
c8f6a362 4758
5c438135
SH		 4759 if (!status)
4760 status = cma_set_qkey(id_priv, be32_to_cpu(multicast->rec.qkey));
498683c6
MS		 4761 else
4762 pr_debug_ratelimited("RDMA CM: MULTICAST_ERROR: failed to join multicast. status %d\n",
4763 status);
b5de0c60
JG		 4764
4765 event->status = status;
4766 event->param.ud.private_data = mc->context;
4767 if (status) {
4768 event->event = RDMA_CM_EVENT_MULTICAST_ERROR;
4769 return;
498683c6 4770 }
c8f6a362 4771
b5de0c60
JG		 4772 dev_addr = &id_priv->id.route.addr.dev_addr;
4773 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
4774 gid_type =
4775 id_priv->cma_dev
4776 ->default_gid_type[id_priv->id.port_num -
4777 rdma_start_port(
4778 id_priv->cma_dev->device)];
4779
4780 event->event = RDMA_CM_EVENT_MULTICAST_JOIN;
4781 if (ib_init_ah_from_mcmember(id_priv->id.device, id_priv->id.port_num,
4782 &multicast->rec, ndev, gid_type,
4783 &event->param.ud.ah_attr)) {
4784 event->event = RDMA_CM_EVENT_MULTICAST_ERROR;
4785 goto out;
4786 }
6d337179 4787
b5de0c60
JG		 4788 event->param.ud.qp_num = 0xFFFFFF;
4789 event->param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
c8f6a362 4790
b5de0c60
JG		 4791out:
4792 if (ndev)
4793 dev_put(ndev);
4794}
f685c195 4795
c8f6a362
SH		 4796static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
4797{
c8f6a362 4798 struct cma_multicast *mc = multicast->context;
b5de0c60 4799 struct rdma_id_private *id_priv = mc->id_priv;
7582df82 4800 struct rdma_cm_event event = {};
37e07cda 4801 int ret = 0;
c8f6a362 4802
37e07cda 4803 mutex_lock(&id_priv->handler_mutex);
5cfbf929
JG		 4804 if (READ_ONCE(id_priv->state) == RDMA_CM_DEVICE_REMOVAL ||
4805 READ_ONCE(id_priv->state) == RDMA_CM_DESTROYING)
37e07cda 4806 goto out;
c8f6a362 4807
b5de0c60 4808 cma_make_mc_event(status, id_priv, multicast, &event, mc);
ed999f82 4809 ret = cma_cm_event_handler(id_priv, &event);
f685c195 4810 rdma_destroy_ah_attr(&event.param.ud.ah_attr);
fe454dc3 4811 WARN_ON(ret);
8aa08602 4812
37e07cda 4813out:
de910bd9 4814 mutex_unlock(&id_priv->handler_mutex);
c8f6a362
SH		 4815 return 0;
4816}
4817
4818static void cma_set_mgid(struct rdma_id_private *id_priv,
4819 struct sockaddr *addr, union ib_gid *mgid)
4820{
4821 unsigned char mc_map[MAX_ADDR_LEN];
4822 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4823 struct sockaddr_in *sin = (struct sockaddr_in *) addr;
4824 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
4825
4826 if (cma_any_addr(addr)) {
4827 memset(mgid, 0, sizeof *mgid);
4828 } else if ((addr->sa_family == AF_INET6) &&
1c9b2819 4829 ((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
c8f6a362
SH		 4830 0xFF10A01B)) {
4831 /* IPv6 address is an SA assigned MGID. */
4832 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
5bc2b7b3
SH		 4833 } else if (addr->sa_family == AF_IB) {
4834 memcpy(mgid, &((struct sockaddr_ib *) addr)->sib_addr, sizeof *mgid);
076dd53b 4835 } else if (addr->sa_family == AF_INET6) {
e2e62697
JG		 4836 ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
4837 if (id_priv->id.ps == RDMA_PS_UDP)
4838 mc_map[7] = 0x01; /* Use RDMA CM signature */
4839 *mgid = *(union ib_gid *) (mc_map + 4);
c8f6a362 4840 } else {
a9e527e3 4841 ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
c8f6a362
SH		 4842 if (id_priv->id.ps == RDMA_PS_UDP)
4843 mc_map[7] = 0x01; /* Use RDMA CM signature */
c8f6a362
SH		 4844 *mgid = *(union ib_gid *) (mc_map + 4);
4845 }
4846}
4847
4848static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
4849 struct cma_multicast *mc)
4850{
4851 struct ib_sa_mcmember_rec rec;
4852 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
4853 ib_sa_comp_mask comp_mask;
4854 int ret;
4855
4856 ib_addr_get_mgid(dev_addr, &rec.mgid);
4857 ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
4858 &rec.mgid, &rec);
4859 if (ret)
4860 return ret;
4861
5bc2b7b3
SH		 4862 ret = cma_set_qkey(id_priv, 0);
4863 if (ret)
4864 return ret;
4865
3f446754 4866 cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
5bc2b7b3 4867 rec.qkey = cpu_to_be32(id_priv->qkey);
6f8372b6 4868 rdma_addr_get_sgid(dev_addr, &rec.port_gid);
c8f6a362 4869 rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
ab15c95a
AV		 4870 rec.join_state = mc->join_state;
4871
c8f6a362
SH		 4872 comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
4873 IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
4874 IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
4875 IB_SA_MCMEMBER_REC_FLOW_LABEL |
4876 IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
4877
84adeee9
YE		 4878 if (id_priv->id.ps == RDMA_PS_IPOIB)
4879 comp_mask |= IB_SA_MCMEMBER_REC_RATE |
2a22fb8c
DB		 4880 IB_SA_MCMEMBER_REC_RATE_SELECTOR |
4881 IB_SA_MCMEMBER_REC_MTU_SELECTOR |
4882 IB_SA_MCMEMBER_REC_MTU |
4883 IB_SA_MCMEMBER_REC_HOP_LIMIT;
84adeee9 4884
b5de0c60
JG		 4885 mc->sa_mc = ib_sa_join_multicast(&sa_client, id_priv->id.device,
4886 id_priv->id.port_num, &rec, comp_mask,
4887 GFP_KERNEL, cma_ib_mc_handler, mc);
4888 return PTR_ERR_OR_ZERO(mc->sa_mc);
3c86aa70
EC		 4889}
4890
be1d325a
NO		 4891static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid,
4892 enum ib_gid_type gid_type)
3c86aa70
EC		 4893{
4894 struct sockaddr_in *sin = (struct sockaddr_in *)addr;
4895 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
4896
4897 if (cma_any_addr(addr)) {
4898 memset(mgid, 0, sizeof *mgid);
4899 } else if (addr->sa_family == AF_INET6) {
4900 memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
4901 } else {
5c181bda
PP		 4902 mgid->raw[0] =
4903 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0xff;
4904 mgid->raw[1] =
4905 (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) ? 0 : 0x0e;
3c86aa70
EC		 4906 mgid->raw[2] = 0;
4907 mgid->raw[3] = 0;
4908 mgid->raw[4] = 0;
4909 mgid->raw[5] = 0;
4910 mgid->raw[6] = 0;
4911 mgid->raw[7] = 0;
4912 mgid->raw[8] = 0;
4913 mgid->raw[9] = 0;
4914 mgid->raw[10] = 0xff;
4915 mgid->raw[11] = 0xff;
4916 *(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
4917 }
4918}
4919
4920static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
4921 struct cma_multicast *mc)
4922{
3c86aa70 4923 struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
bee3c3c9 4924 int err = 0;
3c86aa70
EC		 4925 struct sockaddr *addr = (struct sockaddr *)&mc->addr;
4926 struct net_device *ndev = NULL;
b5de0c60 4927 struct ib_sa_multicast ib;
bee3c3c9 4928 enum ib_gid_type gid_type;
ab15c95a
AV		 4929 bool send_only;
4930
4931 send_only = mc->join_state == BIT(SENDONLY_FULLMEMBER_JOIN);
3c86aa70 4932
b5de0c60 4933 if (cma_zero_addr(addr))
3c86aa70
EC		 4934 return -EINVAL;
4935
be1d325a
NO		 4936 gid_type = id_priv->cma_dev->default_gid_type[id_priv->id.port_num -
4937 rdma_start_port(id_priv->cma_dev->device)];
b5de0c60 4938 cma_iboe_set_mgid(addr, &ib.rec.mgid, gid_type);
3c86aa70 4939
b5de0c60 4940 ib.rec.pkey = cpu_to_be16(0xffff);
3c86aa70 4941 if (id_priv->id.ps == RDMA_PS_UDP)
b5de0c60 4942 ib.rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
3c86aa70
EC		 4943
4944 if (dev_addr->bound_dev_if)
052eac6e 4945 ndev = dev_get_by_index(dev_addr->net, dev_addr->bound_dev_if);
fe454dc3
AH		 4946 if (!ndev)
4947 return -ENODEV;
4948
b5de0c60
JG		 4949 ib.rec.rate = iboe_get_rate(ndev);
4950 ib.rec.hop_limit = 1;
4951 ib.rec.mtu = iboe_get_mtu(ndev->mtu);
bee3c3c9 4952
bee3c3c9 4953 if (addr->sa_family == AF_INET) {
c65f6c5a 4954 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP) {
b5de0c60 4955 ib.rec.hop_limit = IPV6_DEFAULT_HOPLIMIT;
ab15c95a 4956 if (!send_only) {
b5de0c60 4957 err = cma_igmp_send(ndev, &ib.rec.mgid,
ab15c95a 4958 true);
ab15c95a 4959 }
bee3c3c9
MS		 4960 }
4961 } else {
4962 if (gid_type == IB_GID_TYPE_ROCE_UDP_ENCAP)
4963 err = -ENOTSUPP;
4964 }
3c86aa70 4965 dev_put(ndev);
fe454dc3
AH		 4966 if (err || !ib.rec.mtu)
4967 return err ?: -EINVAL;
4968
7b85627b 4969 rdma_ip2gid((struct sockaddr *)&id_priv->id.route.addr.src_addr,
b5de0c60 4970 &ib.rec.port_gid);
fe454dc3
AH		 4971 INIT_WORK(&mc->iboe_join.work, cma_iboe_join_work_handler);
4972 cma_make_mc_event(0, id_priv, &ib, &mc->iboe_join.event, mc);
4973 queue_work(cma_wq, &mc->iboe_join.work);
3c86aa70 4974 return 0;
3c86aa70
EC		 4975}
4976
c8f6a362 4977int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
ab15c95a 4978 u8 join_state, void *context)
c8f6a362 4979{
5cfbf929
JG		 4980 struct rdma_id_private *id_priv =
4981 container_of(id, struct rdma_id_private, id);
c8f6a362
SH		 4982 struct cma_multicast *mc;
4983 int ret;
4984
1bb5091d
JG		 4985 /* Not supported for kernel QPs */
4986 if (WARN_ON(id->qp))
7688f2c3
LR		 4987 return -EINVAL;
4988
5cfbf929
JG		 4989 /* ULP is calling this wrong. */
4990 if (!id->device || (READ_ONCE(id_priv->state) != RDMA_CM_ADDR_BOUND &&
4991 READ_ONCE(id_priv->state) != RDMA_CM_ADDR_RESOLVED))
c8f6a362
SH		 4992 return -EINVAL;
4993
b5de0c60 4994 mc = kzalloc(sizeof(*mc), GFP_KERNEL);
c8f6a362
SH		 4995 if (!mc)
4996 return -ENOMEM;
4997
ef560861 4998 memcpy(&mc->addr, addr, rdma_addr_size(addr));
c8f6a362
SH		 4999 mc->context = context;
5000 mc->id_priv = id_priv;
ab15c95a 5001 mc->join_state = join_state;
c8f6a362 5002
5d9fb044 5003 if (rdma_protocol_roce(id->device, id->port_num)) {
5c9a5282 5004 ret = cma_iboe_join_multicast(id_priv, mc);
c0126915
JG		 5005 if (ret)
5006 goto out_err;
5007 } else if (rdma_cap_ib_mcast(id->device, id->port_num)) {
5c9a5282 5008 ret = cma_join_ib_multicast(id_priv, mc);
c0126915
JG		 5009 if (ret)
5010 goto out_err;
5011 } else {
c8f6a362 5012 ret = -ENOSYS;
c0126915 5013 goto out_err;
c8f6a362 5014 }
c0126915
JG		 5015
5016 spin_lock(&id_priv->lock);
5017 list_add(&mc->list, &id_priv->mc_list);
5018 spin_unlock(&id_priv->lock);
5019
5020 return 0;
5021out_err:
5022 kfree(mc);
c8f6a362
SH		 5023 return ret;
5024}
5025EXPORT_SYMBOL(rdma_join_multicast);
5026
5027void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
5028{
5029 struct rdma_id_private *id_priv;
5030 struct cma_multicast *mc;
5031
5032 id_priv = container_of(id, struct rdma_id_private, id);
5033 spin_lock_irq(&id_priv->lock);
5034 list_for_each_entry(mc, &id_priv->mc_list, list) {
3788d299
JG		 5035 if (memcmp(&mc->addr, addr, rdma_addr_size(addr)) != 0)
5036 continue;
5037 list_del(&mc->list);
5038 spin_unlock_irq(&id_priv->lock);
5c9a5282 5039
3788d299
JG		 5040 WARN_ON(id_priv->cma_dev->device != id->device);
5041 destroy_mc(id_priv, mc);
5042 return;
c8f6a362
SH		 5043 }
5044 spin_unlock_irq(&id_priv->lock);
5045}
5046EXPORT_SYMBOL(rdma_leave_multicast);
5047
dd5bdff8
OG		 5048static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
5049{
5050 struct rdma_dev_addr *dev_addr;
7e85bcda 5051 struct cma_work *work;
dd5bdff8
OG		 5052
5053 dev_addr = &id_priv->id.route.addr.dev_addr;
5054
6266ed6e 5055 if ((dev_addr->bound_dev_if == ndev->ifindex) &&
fa20105e 5056 (net_eq(dev_net(ndev), dev_addr->net)) &&
dd5bdff8 5057 memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
aba25a3e
PP		 5058 pr_info("RDMA CM addr change for ndev %s used by id %p\n",
5059 ndev->name, &id_priv->id);
dd5bdff8
OG		 5060 work = kzalloc(sizeof *work, GFP_KERNEL);
5061 if (!work)
5062 return -ENOMEM;
5063
7e85bcda 5064 INIT_WORK(&work->work, cma_work_handler);
dd5bdff8
OG		 5065 work->id = id_priv;
5066 work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
e368d23f 5067 cma_id_get(id_priv);
dd5bdff8
OG		 5068 queue_work(cma_wq, &work->work);
5069 }
5070
5071 return 0;
5072}
5073
5074static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
351638e7 5075 void *ptr)
dd5bdff8 5076{
351638e7 5077 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
dd5bdff8
OG		 5078 struct cma_device *cma_dev;
5079 struct rdma_id_private *id_priv;
5080 int ret = NOTIFY_DONE;
5081
dd5bdff8
OG		 5082 if (event != NETDEV_BONDING_FAILOVER)
5083 return NOTIFY_DONE;
5084
3cd96fdd 5085 if (!netif_is_bond_master(ndev))
dd5bdff8
OG		 5086 return NOTIFY_DONE;
5087
5088 mutex_lock(&lock);
5089 list_for_each_entry(cma_dev, &dev_list, list)
99cfddb8 5090 list_for_each_entry(id_priv, &cma_dev->id_list, device_item) {
dd5bdff8
OG		 5091 ret = cma_netdev_change(ndev, id_priv);
5092 if (ret)
5093 goto out;
5094 }
5095
5096out:
5097 mutex_unlock(&lock);
5098 return ret;
5099}
5100
925d046e
PH		 5101static void cma_netevent_work_handler(struct work_struct *_work)
5102{
5103 struct rdma_id_private *id_priv =
5104 container_of(_work, struct rdma_id_private, id.net_work);
5105 struct rdma_cm_event event = {};
5106
5107 mutex_lock(&id_priv->handler_mutex);
5108
5109 if (READ_ONCE(id_priv->state) == RDMA_CM_DESTROYING ||
5110 READ_ONCE(id_priv->state) == RDMA_CM_DEVICE_REMOVAL)
5111 goto out_unlock;
5112
5113 event.event = RDMA_CM_EVENT_UNREACHABLE;
5114 event.status = -ETIMEDOUT;
5115
5116 if (cma_cm_event_handler(id_priv, &event)) {
5117 __acquire(&id_priv->handler_mutex);
5118 id_priv->cm_id.ib = NULL;
5119 cma_id_put(id_priv);
5120 destroy_id_handler_unlock(id_priv);
5121 return;
5122 }
5123
5124out_unlock:
5125 mutex_unlock(&id_priv->handler_mutex);
5126 cma_id_put(id_priv);
5127}
5128
5129static int cma_netevent_callback(struct notifier_block *self,
5130 unsigned long event, void *ctx)
5131{
5132 struct id_table_entry *ips_node = NULL;
5133 struct rdma_id_private *current_id;
5134 struct neighbour *neigh = ctx;
5135 unsigned long flags;
5136
5137 if (event != NETEVENT_NEIGH_UPDATE)
5138 return NOTIFY_DONE;
5139
5140 spin_lock_irqsave(&id_table_lock, flags);
5141 if (neigh->tbl->family == AF_INET6) {
5142 struct sockaddr_in6 neigh_sock_6;
5143
5144 neigh_sock_6.sin6_family = AF_INET6;
5145 neigh_sock_6.sin6_addr = *(struct in6_addr *)neigh->primary_key;
5146 ips_node = node_from_ndev_ip(&id_table, neigh->dev->ifindex,
5147 (struct sockaddr *)&neigh_sock_6);
5148 } else if (neigh->tbl->family == AF_INET) {
5149 struct sockaddr_in neigh_sock_4;
5150
5151 neigh_sock_4.sin_family = AF_INET;
5152 neigh_sock_4.sin_addr.s_addr = *(__be32 *)(neigh->primary_key);
5153 ips_node = node_from_ndev_ip(&id_table, neigh->dev->ifindex,
5154 (struct sockaddr *)&neigh_sock_4);
5155 } else
5156 goto out;
5157
5158 if (!ips_node)
5159 goto out;
5160
5161 list_for_each_entry(current_id, &ips_node->id_list, id_list_entry) {
5162 if (!memcmp(current_id->id.route.addr.dev_addr.dst_dev_addr,
5163 neigh->ha, ETH_ALEN))
5164 continue;
5165 INIT_WORK(&current_id->id.net_work, cma_netevent_work_handler);
5166 cma_id_get(current_id);
5167 queue_work(cma_wq, &current_id->id.net_work);
5168 }
5169out:
5170 spin_unlock_irqrestore(&id_table_lock, flags);
5171 return NOTIFY_DONE;
5172}
5173
dd5bdff8
OG		 5174static struct notifier_block cma_nb = {
5175 .notifier_call = cma_netdev_callback
5176};
5177
925d046e
PH		 5178static struct notifier_block cma_netevent_cb = {
5179 .notifier_call = cma_netevent_callback
5180};
5181
3647a28d 5182static void cma_send_device_removal_put(struct rdma_id_private *id_priv)
e51060f0 5183{
3647a28d 5184 struct rdma_cm_event event = { .event = RDMA_CM_EVENT_DEVICE_REMOVAL };
550e5ca7 5185 enum rdma_cm_state state;
3647a28d 5186 unsigned long flags;
e51060f0 5187
de910bd9 5188 mutex_lock(&id_priv->handler_mutex);
3647a28d
JG		 5189 /* Record that we want to remove the device */
5190 spin_lock_irqsave(&id_priv->lock, flags);
5191 state = id_priv->state;
5192 if (state == RDMA_CM_DESTROYING || state == RDMA_CM_DEVICE_REMOVAL) {
5193 spin_unlock_irqrestore(&id_priv->lock, flags);
5194 mutex_unlock(&id_priv->handler_mutex);
5195 cma_id_put(id_priv);
5196 return;
5197 }
5198 id_priv->state = RDMA_CM_DEVICE_REMOVAL;
5199 spin_unlock_irqrestore(&id_priv->lock, flags);
e51060f0 5200
3647a28d
JG		 5201 if (cma_cm_event_handler(id_priv, &event)) {
5202 /*
5203 * At this point the ULP promises it won't call
5204 * rdma_destroy_id() concurrently
5205 */
5206 cma_id_put(id_priv);
5207 mutex_unlock(&id_priv->handler_mutex);
f6a9d47a
JG		 5208 trace_cm_id_destroy(id_priv);
5209 _destroy_id(id_priv, state);
3647a28d
JG		 5210 return;
5211 }
de910bd9 5212 mutex_unlock(&id_priv->handler_mutex);
3647a28d
JG		 5213
5214 /*
5215 * If this races with destroy then the thread that first assigns state
5216 * to a destroying does the cancel.
5217 */
5218 cma_cancel_operation(id_priv, state);
5219 cma_id_put(id_priv);
e51060f0
SH		 5220}
5221
5222static void cma_process_remove(struct cma_device *cma_dev)
5223{
e51060f0
SH		 5224 mutex_lock(&lock);
5225 while (!list_empty(&cma_dev->id_list)) {
3647a28d 5226 struct rdma_id_private *id_priv = list_first_entry(
99cfddb8 5227 &cma_dev->id_list, struct rdma_id_private, device_item);
e51060f0 5228
99cfddb8
JG		 5229 list_del_init(&id_priv->listen_item);
5230 list_del_init(&id_priv->device_item);
e368d23f 5231 cma_id_get(id_priv);
e51060f0
SH		 5232 mutex_unlock(&lock);
5233
3647a28d 5234 cma_send_device_removal_put(id_priv);
e51060f0
SH		 5235
5236 mutex_lock(&lock);
5237 }
5238 mutex_unlock(&lock);
5239
5ff8c8fa 5240 cma_dev_put(cma_dev);
e51060f0
SH		 5241 wait_for_completion(&cma_dev->comp);
5242}
5243
4d51c3d9
PP		 5244static bool cma_supported(struct ib_device *device)
5245{
5246 u32 i;
5247
5248 rdma_for_each_port(device, i) {
5249 if (rdma_cap_ib_cm(device, i) || rdma_cap_iw_cm(device, i))
5250 return true;
5251 }
5252 return false;
5253}
5254
c80a0c52
LR		 5255static int cma_add_one(struct ib_device *device)
5256{
dd37d2f5 5257 struct rdma_id_private *to_destroy;
c80a0c52
LR		 5258 struct cma_device *cma_dev;
5259 struct rdma_id_private *id_priv;
c80a0c52
LR		 5260 unsigned long supported_gids = 0;
5261 int ret;
1fb7f897 5262 u32 i;
c80a0c52 5263
4d51c3d9
PP		 5264 if (!cma_supported(device))
5265 return -EOPNOTSUPP;
5266
c80a0c52
LR		 5267 cma_dev = kmalloc(sizeof(*cma_dev), GFP_KERNEL);
5268 if (!cma_dev)
5269 return -ENOMEM;
5270
5271 cma_dev->device = device;
5272 cma_dev->default_gid_type = kcalloc(device->phys_port_cnt,
5273 sizeof(*cma_dev->default_gid_type),
5274 GFP_KERNEL);
5275 if (!cma_dev->default_gid_type) {
5276 ret = -ENOMEM;
5277 goto free_cma_dev;
5278 }
5279
5280 cma_dev->default_roce_tos = kcalloc(device->phys_port_cnt,
5281 sizeof(*cma_dev->default_roce_tos),
5282 GFP_KERNEL);
5283 if (!cma_dev->default_roce_tos) {
5284 ret = -ENOMEM;
5285 goto free_gid_type;
5286 }
5287
5288 rdma_for_each_port (device, i) {
5289 supported_gids = roce_gid_type_mask_support(device, i);
5290 WARN_ON(!supported_gids);
5291 if (supported_gids & (1 << CMA_PREFERRED_ROCE_GID_TYPE))
5292 cma_dev->default_gid_type[i - rdma_start_port(device)] =
5293 CMA_PREFERRED_ROCE_GID_TYPE;
5294 else
5295 cma_dev->default_gid_type[i - rdma_start_port(device)] =
5296 find_first_bit(&supported_gids, BITS_PER_LONG);
5297 cma_dev->default_roce_tos[i - rdma_start_port(device)] = 0;
5298 }
5299
5300 init_completion(&cma_dev->comp);
5301 refcount_set(&cma_dev->refcount, 1);
5302 INIT_LIST_HEAD(&cma_dev->id_list);
5303 ib_set_client_data(device, &cma_client, cma_dev);
5304
5305 mutex_lock(&lock);
5306 list_add_tail(&cma_dev->list, &dev_list);
99cfddb8 5307 list_for_each_entry(id_priv, &listen_any_list, listen_any_item) {
dd37d2f5 5308 ret = cma_listen_on_dev(id_priv, cma_dev, &to_destroy);
c80a0c52
LR		 5309 if (ret)
5310 goto free_listen;
5311 }
5312 mutex_unlock(&lock);
5313
5314 trace_cm_add_one(device);
5315 return 0;
5316
5317free_listen:
5318 list_del(&cma_dev->list);
5319 mutex_unlock(&lock);
5320
dd37d2f5 5321 /* cma_process_remove() will delete to_destroy */
c80a0c52
LR		 5322 cma_process_remove(cma_dev);
5323 kfree(cma_dev->default_roce_tos);
5324free_gid_type:
5325 kfree(cma_dev->default_gid_type);
5326
5327free_cma_dev:
5328 kfree(cma_dev);
5329 return ret;
5330}
5331
7c1eb45a 5332static void cma_remove_one(struct ib_device *device, void *client_data)
e51060f0 5333{
7c1eb45a 5334 struct cma_device *cma_dev = client_data;
e51060f0 5335
ed999f82
CL		 5336 trace_cm_remove_one(device);
5337
e51060f0
SH		 5338 mutex_lock(&lock);
5339 list_del(&cma_dev->list);
5340 mutex_unlock(&lock);
5341
5342 cma_process_remove(cma_dev);
89052d78 5343 kfree(cma_dev->default_roce_tos);
045959db 5344 kfree(cma_dev->default_gid_type);
e51060f0
SH		 5345 kfree(cma_dev);
5346}
5347
4be74b42
HE		 5348static int cma_init_net(struct net *net)
5349{
5350 struct cma_pernet *pernet = cma_pernet(net);
5351
63826753
MW		 5352 xa_init(&pernet->tcp_ps);
5353 xa_init(&pernet->udp_ps);
5354 xa_init(&pernet->ipoib_ps);
5355 xa_init(&pernet->ib_ps);
4be74b42
HE		 5356
5357 return 0;
5358}
5359
5360static void cma_exit_net(struct net *net)
5361{
5362 struct cma_pernet *pernet = cma_pernet(net);
5363
63826753
MW		 5364 WARN_ON(!xa_empty(&pernet->tcp_ps));
5365 WARN_ON(!xa_empty(&pernet->udp_ps));
5366 WARN_ON(!xa_empty(&pernet->ipoib_ps));
5367 WARN_ON(!xa_empty(&pernet->ib_ps));
4be74b42
HE		 5368}
5369
5370static struct pernet_operations cma_pernet_operations = {
5371 .init = cma_init_net,
5372 .exit = cma_exit_net,
5373 .id = &cma_pernet_id,
5374 .size = sizeof(struct cma_pernet),
5375};
5376
716abb1f 5377static int __init cma_init(void)
e51060f0 5378{
5d7220e8 5379 int ret;
227b60f5 5380
32ac9e43
JG		 5381 /*
5382 * There is a rare lock ordering dependency in cma_netdev_callback()
5383 * that only happens when bonding is enabled. Teach lockdep that rtnl
5384 * must never be nested under lock so it can find these without having
5385 * to test with bonding.
5386 */
5387 if (IS_ENABLED(CONFIG_LOCKDEP)) {
5388 rtnl_lock();
5389 mutex_lock(&lock);
5390 mutex_unlock(&lock);
5391 rtnl_unlock();
5392 }
5393
dee9acbb 5394 cma_wq = alloc_ordered_workqueue("rdma_cm", WQ_MEM_RECLAIM);
e51060f0
SH		 5395 if (!cma_wq)
5396 return -ENOMEM;
5397
4be74b42
HE		 5398 ret = register_pernet_subsys(&cma_pernet_operations);
5399 if (ret)
5400 goto err_wq;
5401
c1a0b23b 5402 ib_sa_register_client(&sa_client);
dd5bdff8 5403 register_netdevice_notifier(&cma_nb);
925d046e 5404 register_netevent_notifier(&cma_netevent_cb);
c1a0b23b 5405
e51060f0
SH		 5406 ret = ib_register_client(&cma_client);
5407 if (ret)
5408 goto err;
753f618a 5409
a7bfb93f 5410 ret = cma_configfs_init();
5411 if (ret)
5412 goto err_ib;
753f618a 5413
e51060f0
SH		 5414 return 0;
5415
a7bfb93f 5416err_ib:
5417 ib_unregister_client(&cma_client);
e51060f0 5418err:
925d046e 5419 unregister_netevent_notifier(&cma_netevent_cb);
dd5bdff8 5420 unregister_netdevice_notifier(&cma_nb);
c1a0b23b 5421 ib_sa_unregister_client(&sa_client);
44a7b675 5422 unregister_pernet_subsys(&cma_pernet_operations);
4be74b42 5423err_wq:
e51060f0
SH		 5424 destroy_workqueue(cma_wq);
5425 return ret;
5426}
5427
716abb1f 5428static void __exit cma_cleanup(void)
e51060f0 5429{
045959db 5430 cma_configfs_exit();
e51060f0 5431 ib_unregister_client(&cma_client);
925d046e 5432 unregister_netevent_notifier(&cma_netevent_cb);
dd5bdff8 5433 unregister_netdevice_notifier(&cma_nb);
c1a0b23b 5434 ib_sa_unregister_client(&sa_client);
4be74b42 5435 unregister_pernet_subsys(&cma_pernet_operations);
e51060f0 5436 destroy_workqueue(cma_wq);
e51060f0
SH		 5437}
5438
5439module_init(cma_init);
5440module_exit(cma_cleanup);
Linux 6.x block layer and io_uring tree(s)