projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
[deliverable/linux.git] / drivers / infiniband / core / roce_gid_mgmt.c
CommitLineData
03db3a2d
MB		 1/*
2 * Copyright (c) 2015, Mellanox Technologies inc. All rights reserved.
3 *
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
9 *
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
12 * conditions are met:
13 *
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
16 * disclaimer.
17 *
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
22 *
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
30 * SOFTWARE.
31 */
32
33#include "core_priv.h"
34
35#include <linux/in.h>
36#include <linux/in6.h>
37
38/* For in6_dev_get/in6_dev_put */
39#include <net/addrconf.h>
238fdf48 40#include <net/bonding.h>
03db3a2d
MB		 41
42#include <rdma/ib_cache.h>
43#include <rdma/ib_addr.h>
44
45enum gid_op_type {
46 GID_DEL = 0,
47 GID_ADD
48};
49
50struct update_gid_event_work {
51 struct work_struct work;
52 union ib_gid gid;
53 struct ib_gid_attr gid_attr;
54 enum gid_op_type gid_op;
55};
56
238fdf48 57#define ROCE_NETDEV_CALLBACK_SZ 3
03db3a2d
MB		 58struct netdev_event_work_cmd {
59 roce_netdev_callback cb;
60 roce_netdev_filter filter;
238fdf48
MB		 61 struct net_device *ndev;
62 struct net_device *filter_ndev;
03db3a2d
MB		 63};
64
65struct netdev_event_work {
66 struct work_struct work;
67 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ];
03db3a2d
MB		 68};
69
b39ffa1d
MB		 70static const struct {
71 bool (*is_supported)(const struct ib_device *device, u8 port_num);
72 enum ib_gid_type gid_type;
73} PORT_CAP_TO_GID_TYPE[] = {
7766a99f
MB		 74 {rdma_protocol_roce_eth_encap, IB_GID_TYPE_ROCE},
75 {rdma_protocol_roce_udp_encap, IB_GID_TYPE_ROCE_UDP_ENCAP},
b39ffa1d
MB		 76};
77
78#define CAP_TO_GID_TABLE_SIZE ARRAY_SIZE(PORT_CAP_TO_GID_TYPE)
79
80unsigned long roce_gid_type_mask_support(struct ib_device *ib_dev, u8 port)
81{
82 int i;
83 unsigned int ret_flags = 0;
84
85 if (!rdma_protocol_roce(ib_dev, port))
86 return 1UL << IB_GID_TYPE_IB;
87
88 for (i = 0; i < CAP_TO_GID_TABLE_SIZE; i++)
89 if (PORT_CAP_TO_GID_TYPE[i].is_supported(ib_dev, port))
90 ret_flags |= 1UL << PORT_CAP_TO_GID_TYPE[i].gid_type;
91
92 return ret_flags;
93}
94EXPORT_SYMBOL(roce_gid_type_mask_support);
95
03db3a2d
MB		 96static void update_gid(enum gid_op_type gid_op, struct ib_device *ib_dev,
97 u8 port, union ib_gid *gid,
98 struct ib_gid_attr *gid_attr)
99{
b39ffa1d
MB		 100 int i;
101 unsigned long gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
102
103 for (i = 0; i < IB_GID_TYPE_SIZE; i++) {
104 if ((1UL << i) & gid_type_mask) {
105 gid_attr->gid_type = i;
106 switch (gid_op) {
107 case GID_ADD:
108 ib_cache_gid_add(ib_dev, port,
109 gid, gid_attr);
110 break;
111 case GID_DEL:
112 ib_cache_gid_del(ib_dev, port,
113 gid, gid_attr);
114 break;
115 }
116 }
03db3a2d
MB		 117 }
118}
119
238fdf48
MB		 120enum bonding_slave_state {
121 BONDING_SLAVE_STATE_ACTIVE = 1UL << 0,
122 BONDING_SLAVE_STATE_INACTIVE = 1UL << 1,
123 /* No primary slave or the device isn't a slave in bonding */
124 BONDING_SLAVE_STATE_NA = 1UL << 2,
125};
126
127static enum bonding_slave_state is_eth_active_slave_of_bonding_rcu(struct net_device *dev,
128 struct net_device *upper)
129{
130 if (upper && netif_is_bond_master(upper)) {
131 struct net_device *pdev =
132 bond_option_active_slave_get_rcu(netdev_priv(upper));
133
134 if (pdev)
135 return dev == pdev ? BONDING_SLAVE_STATE_ACTIVE :
136 BONDING_SLAVE_STATE_INACTIVE;
137 }
138
139 return BONDING_SLAVE_STATE_NA;
140}
141
238fdf48
MB		 142#define REQUIRED_BOND_STATES (BONDING_SLAVE_STATE_ACTIVE | \
143 BONDING_SLAVE_STATE_NA)
03db3a2d
MB		 144static int is_eth_port_of_netdev(struct ib_device *ib_dev, u8 port,
145 struct net_device *rdma_ndev, void *cookie)
146{
238fdf48 147 struct net_device *event_ndev = (struct net_device *)cookie;
03db3a2d 148 struct net_device *real_dev;
238fdf48
MB		 149 int res;
150
151 if (!rdma_ndev)
152 return 0;
153
154 rcu_read_lock();
155 real_dev = rdma_vlan_dev_real_dev(event_ndev);
156 if (!real_dev)
157 real_dev = event_ndev;
158
6020d7e5 159 res = ((rdma_is_upper_dev_rcu(rdma_ndev, event_ndev) &&
238fdf48
MB		 160 (is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) &
161 REQUIRED_BOND_STATES)) ||
162 real_dev == rdma_ndev);
163
164 rcu_read_unlock();
165 return res;
166}
167
168static int is_eth_port_inactive_slave(struct ib_device *ib_dev, u8 port,
169 struct net_device *rdma_ndev, void *cookie)
170{
03db3a2d 171 struct net_device *master_dev;
03db3a2d
MB		 172 int res;
173
174 if (!rdma_ndev)
175 return 0;
176
177 rcu_read_lock();
178 master_dev = netdev_master_upper_dev_get_rcu(rdma_ndev);
238fdf48
MB		 179 res = is_eth_active_slave_of_bonding_rcu(rdma_ndev, master_dev) ==
180 BONDING_SLAVE_STATE_INACTIVE;
03db3a2d
MB		 181 rcu_read_unlock();
182
183 return res;
184}
185
186static int pass_all_filter(struct ib_device *ib_dev, u8 port,
187 struct net_device *rdma_ndev, void *cookie)
188{
189 return 1;
190}
191
238fdf48
MB		 192static int upper_device_filter(struct ib_device *ib_dev, u8 port,
193 struct net_device *rdma_ndev, void *cookie)
194{
195 struct net_device *event_ndev = (struct net_device *)cookie;
196 int res;
197
198 if (!rdma_ndev)
199 return 0;
200
201 if (rdma_ndev == event_ndev)
202 return 1;
203
204 rcu_read_lock();
6020d7e5 205 res = rdma_is_upper_dev_rcu(rdma_ndev, event_ndev);
238fdf48
MB		 206 rcu_read_unlock();
207
208 return res;
209}
210
03db3a2d
MB		 211static void update_gid_ip(enum gid_op_type gid_op,
212 struct ib_device *ib_dev,
213 u8 port, struct net_device *ndev,
214 struct sockaddr *addr)
215{
216 union ib_gid gid;
217 struct ib_gid_attr gid_attr;
218
219 rdma_ip2gid(addr, &gid);
220 memset(&gid_attr, 0, sizeof(gid_attr));
221 gid_attr.ndev = ndev;
222
223 update_gid(gid_op, ib_dev, port, &gid, &gid_attr);
224}
225
226static void enum_netdev_default_gids(struct ib_device *ib_dev,
227 u8 port, struct net_device *event_ndev,
228 struct net_device *rdma_ndev)
229{
b39ffa1d
MB		 230 unsigned long gid_type_mask;
231
238fdf48
MB		 232 rcu_read_lock();
233 if (!rdma_ndev ||
234 ((rdma_ndev != event_ndev &&
6020d7e5 235 !rdma_is_upper_dev_rcu(rdma_ndev, event_ndev)) ||
238fdf48
MB		 236 is_eth_active_slave_of_bonding_rcu(rdma_ndev,
237 netdev_master_upper_dev_get_rcu(rdma_ndev)) ==
238 BONDING_SLAVE_STATE_INACTIVE)) {
239 rcu_read_unlock();
03db3a2d 240 return;
238fdf48
MB		 241 }
242 rcu_read_unlock();
03db3a2d 243
b39ffa1d
MB		 244 gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
245
246 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev, gid_type_mask,
03db3a2d
MB		 247 IB_CACHE_GID_DEFAULT_MODE_SET);
248}
249
238fdf48
MB		 250static void bond_delete_netdev_default_gids(struct ib_device *ib_dev,
251 u8 port,
252 struct net_device *event_ndev,
253 struct net_device *rdma_ndev)
254{
255 struct net_device *real_dev = rdma_vlan_dev_real_dev(event_ndev);
256
257 if (!rdma_ndev)
258 return;
259
260 if (!real_dev)
261 real_dev = event_ndev;
262
263 rcu_read_lock();
264
6020d7e5 265 if (rdma_is_upper_dev_rcu(rdma_ndev, event_ndev) &&
238fdf48
MB		 266 is_eth_active_slave_of_bonding_rcu(rdma_ndev, real_dev) ==
267 BONDING_SLAVE_STATE_INACTIVE) {
b39ffa1d
MB		 268 unsigned long gid_type_mask;
269
238fdf48
MB		 270 rcu_read_unlock();
271
b39ffa1d
MB		 272 gid_type_mask = roce_gid_type_mask_support(ib_dev, port);
273
238fdf48 274 ib_cache_gid_set_default_gid(ib_dev, port, rdma_ndev,
b39ffa1d 275 gid_type_mask,
238fdf48
MB		 276 IB_CACHE_GID_DEFAULT_MODE_DELETE);
277 } else {
278 rcu_read_unlock();
279 }
280}
281
03db3a2d
MB		 282static void enum_netdev_ipv4_ips(struct ib_device *ib_dev,
283 u8 port, struct net_device *ndev)
284{
285 struct in_device *in_dev;
39096420
MB		 286 struct sin_list {
287 struct list_head list;
288 struct sockaddr_in ip;
289 };
290 struct sin_list *sin_iter;
291 struct sin_list *sin_temp;
292
293 LIST_HEAD(sin_list);
03db3a2d
MB		 294 if (ndev->reg_state >= NETREG_UNREGISTERING)
295 return;
296
39096420
MB		 297 rcu_read_lock();
298 in_dev = __in_dev_get_rcu(ndev);
299 if (!in_dev) {
300 rcu_read_unlock();
03db3a2d 301 return;
39096420 302 }
03db3a2d
MB		 303
304 for_ifa(in_dev) {
39096420
MB		 305 struct sin_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
306
307 if (!entry) {
308 pr_warn("roce_gid_mgmt: couldn't allocate entry for IPv4 update\n");
309 continue;
310 }
311 entry->ip.sin_family = AF_INET;
312 entry->ip.sin_addr.s_addr = ifa->ifa_address;
313 list_add_tail(&entry->list, &sin_list);
03db3a2d
MB		 314 }
315 endfor_ifa(in_dev);
39096420 316 rcu_read_unlock();
03db3a2d 317
39096420
MB		 318 list_for_each_entry_safe(sin_iter, sin_temp, &sin_list, list) {
319 update_gid_ip(GID_ADD, ib_dev, port, ndev,
320 (struct sockaddr *)&sin_iter->ip);
321 list_del(&sin_iter->list);
322 kfree(sin_iter);
323 }
03db3a2d
MB		 324}
325
326static void enum_netdev_ipv6_ips(struct ib_device *ib_dev,
327 u8 port, struct net_device *ndev)
328{
329 struct inet6_ifaddr *ifp;
330 struct inet6_dev *in6_dev;
331 struct sin6_list {
332 struct list_head list;
333 struct sockaddr_in6 sin6;
334 };
335 struct sin6_list *sin6_iter;
336 struct sin6_list *sin6_temp;
337 struct ib_gid_attr gid_attr = {.ndev = ndev};
338 LIST_HEAD(sin6_list);
339
340 if (ndev->reg_state >= NETREG_UNREGISTERING)
341 return;
342
343 in6_dev = in6_dev_get(ndev);
344 if (!in6_dev)
345 return;
346
347 read_lock_bh(&in6_dev->lock);
348 list_for_each_entry(ifp, &in6_dev->addr_list, if_list) {
349 struct sin6_list *entry = kzalloc(sizeof(*entry), GFP_ATOMIC);
350
351 if (!entry) {
352 pr_warn("roce_gid_mgmt: couldn't allocate entry for IPv6 update\n");
353 continue;
354 }
355
356 entry->sin6.sin6_family = AF_INET6;
357 entry->sin6.sin6_addr = ifp->addr;
358 list_add_tail(&entry->list, &sin6_list);
359 }
360 read_unlock_bh(&in6_dev->lock);
361
362 in6_dev_put(in6_dev);
363
364 list_for_each_entry_safe(sin6_iter, sin6_temp, &sin6_list, list) {
365 union ib_gid gid;
366
367 rdma_ip2gid((struct sockaddr *)&sin6_iter->sin6, &gid);
368 update_gid(GID_ADD, ib_dev, port, &gid, &gid_attr);
369 list_del(&sin6_iter->list);
370 kfree(sin6_iter);
371 }
372}
373
238fdf48
MB		 374static void _add_netdev_ips(struct ib_device *ib_dev, u8 port,
375 struct net_device *ndev)
376{
377 enum_netdev_ipv4_ips(ib_dev, port, ndev);
378 if (IS_ENABLED(CONFIG_IPV6))
379 enum_netdev_ipv6_ips(ib_dev, port, ndev);
380}
381
03db3a2d
MB		 382static void add_netdev_ips(struct ib_device *ib_dev, u8 port,
383 struct net_device *rdma_ndev, void *cookie)
384{
385 struct net_device *event_ndev = (struct net_device *)cookie;
386
387 enum_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev);
238fdf48 388 _add_netdev_ips(ib_dev, port, event_ndev);
03db3a2d
MB		 389}
390
391static void del_netdev_ips(struct ib_device *ib_dev, u8 port,
392 struct net_device *rdma_ndev, void *cookie)
393{
394 struct net_device *event_ndev = (struct net_device *)cookie;
395
396 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev);
397}
398
399static void enum_all_gids_of_dev_cb(struct ib_device *ib_dev,
400 u8 port,
401 struct net_device *rdma_ndev,
402 void *cookie)
403{
404 struct net *net;
405 struct net_device *ndev;
406
407 /* Lock the rtnl to make sure the netdevs does not move under
408 * our feet
409 */
410 rtnl_lock();
411 for_each_net(net)
412 for_each_netdev(net, ndev)
413 if (is_eth_port_of_netdev(ib_dev, port, rdma_ndev, ndev))
414 add_netdev_ips(ib_dev, port, rdma_ndev, ndev);
415 rtnl_unlock();
416}
417
418/* This function will rescan all of the network devices in the system
419 * and add their gids, as needed, to the relevant RoCE devices. */
420int roce_rescan_device(struct ib_device *ib_dev)
421{
422 ib_enum_roce_netdev(ib_dev, pass_all_filter, NULL,
423 enum_all_gids_of_dev_cb, NULL);
424
425 return 0;
426}
427
428static void callback_for_addr_gid_device_scan(struct ib_device *device,
429 u8 port,
430 struct net_device *rdma_ndev,
431 void *cookie)
432{
433 struct update_gid_event_work *parsed = cookie;
434
435 return update_gid(parsed->gid_op, device,
436 port, &parsed->gid,
437 &parsed->gid_attr);
438}
439
238fdf48
MB		 440static void handle_netdev_upper(struct ib_device *ib_dev, u8 port,
441 void *cookie,
442 void (*handle_netdev)(struct ib_device *ib_dev,
443 u8 port,
444 struct net_device *ndev))
445{
446 struct net_device *ndev = (struct net_device *)cookie;
447 struct upper_list {
448 struct list_head list;
449 struct net_device *upper;
450 };
451 struct net_device *upper;
452 struct list_head *iter;
453 struct upper_list *upper_iter;
454 struct upper_list *upper_temp;
455 LIST_HEAD(upper_list);
456
457 rcu_read_lock();
458 netdev_for_each_all_upper_dev_rcu(ndev, upper, iter) {
459 struct upper_list *entry = kmalloc(sizeof(*entry),
460 GFP_ATOMIC);
461
462 if (!entry) {
463 pr_info("roce_gid_mgmt: couldn't allocate entry to delete ndev\n");
464 continue;
465 }
466
467 list_add_tail(&entry->list, &upper_list);
468 dev_hold(upper);
469 entry->upper = upper;
470 }
471 rcu_read_unlock();
472
473 handle_netdev(ib_dev, port, ndev);
474 list_for_each_entry_safe(upper_iter, upper_temp, &upper_list,
475 list) {
476 handle_netdev(ib_dev, port, upper_iter->upper);
477 dev_put(upper_iter->upper);
478 list_del(&upper_iter->list);
479 kfree(upper_iter);
480 }
481}
482
483static void _roce_del_all_netdev_gids(struct ib_device *ib_dev, u8 port,
484 struct net_device *event_ndev)
485{
486 ib_cache_gid_del_all_netdev_gids(ib_dev, port, event_ndev);
487}
488
489static void del_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
490 struct net_device *rdma_ndev, void *cookie)
491{
492 handle_netdev_upper(ib_dev, port, cookie, _roce_del_all_netdev_gids);
493}
494
495static void add_netdev_upper_ips(struct ib_device *ib_dev, u8 port,
496 struct net_device *rdma_ndev, void *cookie)
497{
498 handle_netdev_upper(ib_dev, port, cookie, _add_netdev_ips);
499}
500
501static void del_netdev_default_ips_join(struct ib_device *ib_dev, u8 port,
502 struct net_device *rdma_ndev,
503 void *cookie)
504{
505 struct net_device *master_ndev;
506
507 rcu_read_lock();
508 master_ndev = netdev_master_upper_dev_get_rcu(rdma_ndev);
509 if (master_ndev)
510 dev_hold(master_ndev);
511 rcu_read_unlock();
512
513 if (master_ndev) {
514 bond_delete_netdev_default_gids(ib_dev, port, master_ndev,
515 rdma_ndev);
516 dev_put(master_ndev);
517 }
518}
519
520static void del_netdev_default_ips(struct ib_device *ib_dev, u8 port,
521 struct net_device *rdma_ndev, void *cookie)
522{
523 struct net_device *event_ndev = (struct net_device *)cookie;
524
525 bond_delete_netdev_default_gids(ib_dev, port, event_ndev, rdma_ndev);
526}
527
03db3a2d
MB		 528/* The following functions operate on all IB devices. netdevice_event and
529 * addr_event execute ib_enum_all_roce_netdevs through a work.
530 * ib_enum_all_roce_netdevs iterates through all IB devices.
531 */
532
533static void netdevice_event_work_handler(struct work_struct *_work)
534{
535 struct netdev_event_work *work =
536 container_of(_work, struct netdev_event_work, work);
537 unsigned int i;
538
238fdf48
MB		 539 for (i = 0; i < ARRAY_SIZE(work->cmds) && work->cmds[i].cb; i++) {
540 ib_enum_all_roce_netdevs(work->cmds[i].filter,
541 work->cmds[i].filter_ndev,
542 work->cmds[i].cb,
543 work->cmds[i].ndev);
544 dev_put(work->cmds[i].ndev);
545 dev_put(work->cmds[i].filter_ndev);
546 }
03db3a2d 547
03db3a2d
MB		 548 kfree(work);
549}
550
551static int netdevice_queue_work(struct netdev_event_work_cmd *cmds,
552 struct net_device *ndev)
553{
238fdf48 554 unsigned int i;
03db3a2d
MB		 555 struct netdev_event_work *ndev_work =
556 kmalloc(sizeof(*ndev_work), GFP_KERNEL);
557
558 if (!ndev_work) {
559 pr_warn("roce_gid_mgmt: can't allocate work for netdevice_event\n");
560 return NOTIFY_DONE;
561 }
562
563 memcpy(ndev_work->cmds, cmds, sizeof(ndev_work->cmds));
238fdf48
MB		 564 for (i = 0; i < ARRAY_SIZE(ndev_work->cmds) && ndev_work->cmds[i].cb; i++) {
565 if (!ndev_work->cmds[i].ndev)
566 ndev_work->cmds[i].ndev = ndev;
567 if (!ndev_work->cmds[i].filter_ndev)
568 ndev_work->cmds[i].filter_ndev = ndev;
569 dev_hold(ndev_work->cmds[i].ndev);
570 dev_hold(ndev_work->cmds[i].filter_ndev);
571 }
03db3a2d
MB		 572 INIT_WORK(&ndev_work->work, netdevice_event_work_handler);
573
574 queue_work(ib_wq, &ndev_work->work);
575
576 return NOTIFY_DONE;
577}
578
238fdf48
MB		 579static const struct netdev_event_work_cmd add_cmd = {
580 .cb = add_netdev_ips, .filter = is_eth_port_of_netdev};
581static const struct netdev_event_work_cmd add_cmd_upper_ips = {
582 .cb = add_netdev_upper_ips, .filter = is_eth_port_of_netdev};
583
26d2177e 584static void netdevice_event_changeupper(struct netdev_notifier_changeupper_info *changeupper_info,
238fdf48
MB		 585 struct netdev_event_work_cmd *cmds)
586{
587 static const struct netdev_event_work_cmd upper_ips_del_cmd = {
588 .cb = del_netdev_upper_ips, .filter = upper_device_filter};
589 static const struct netdev_event_work_cmd bonding_default_del_cmd = {
590 .cb = del_netdev_default_ips, .filter = is_eth_port_inactive_slave};
591
26d2177e 592 if (changeupper_info->linking == false) {
238fdf48 593 cmds[0] = upper_ips_del_cmd;
26d2177e 594 cmds[0].ndev = changeupper_info->upper_dev;
238fdf48 595 cmds[1] = add_cmd;
26d2177e 596 } else {
238fdf48 597 cmds[0] = bonding_default_del_cmd;
26d2177e 598 cmds[0].ndev = changeupper_info->upper_dev;
238fdf48 599 cmds[1] = add_cmd_upper_ips;
26d2177e
LT		 600 cmds[1].ndev = changeupper_info->upper_dev;
601 cmds[1].filter_ndev = changeupper_info->upper_dev;
238fdf48
MB		 602 }
603}
604
03db3a2d
MB		 605static int netdevice_event(struct notifier_block *this, unsigned long event,
606 void *ptr)
607{
03db3a2d
MB		 608 static const struct netdev_event_work_cmd del_cmd = {
609 .cb = del_netdev_ips, .filter = pass_all_filter};
238fdf48
MB		 610 static const struct netdev_event_work_cmd bonding_default_del_cmd_join = {
611 .cb = del_netdev_default_ips_join, .filter = is_eth_port_inactive_slave};
612 static const struct netdev_event_work_cmd default_del_cmd = {
613 .cb = del_netdev_default_ips, .filter = pass_all_filter};
614 static const struct netdev_event_work_cmd bonding_event_ips_del_cmd = {
615 .cb = del_netdev_upper_ips, .filter = upper_device_filter};
03db3a2d
MB		 616 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
617 struct netdev_event_work_cmd cmds[ROCE_NETDEV_CALLBACK_SZ] = { {NULL} };
618
619 if (ndev->type != ARPHRD_ETHER)
620 return NOTIFY_DONE;
621
622 switch (event) {
623 case NETDEV_REGISTER:
624 case NETDEV_UP:
238fdf48
MB		 625 cmds[0] = bonding_default_del_cmd_join;
626 cmds[1] = add_cmd;
03db3a2d
MB		 627 break;
628
629 case NETDEV_UNREGISTER:
630 if (ndev->reg_state < NETREG_UNREGISTERED)
631 cmds[0] = del_cmd;
632 else
633 return NOTIFY_DONE;
634 break;
635
636 case NETDEV_CHANGEADDR:
238fdf48 637 cmds[0] = default_del_cmd;
03db3a2d
MB		 638 cmds[1] = add_cmd;
639 break;
238fdf48
MB		 640
641 case NETDEV_CHANGEUPPER:
642 netdevice_event_changeupper(
26d2177e 643 container_of(ptr, struct netdev_notifier_changeupper_info, info),
238fdf48
MB		 644 cmds);
645 break;
646
647 case NETDEV_BONDING_FAILOVER:
648 cmds[0] = bonding_event_ips_del_cmd;
649 cmds[1] = bonding_default_del_cmd_join;
650 cmds[2] = add_cmd_upper_ips;
651 break;
652
03db3a2d
MB		 653 default:
654 return NOTIFY_DONE;
655 }
656
657 return netdevice_queue_work(cmds, ndev);
658}
659
660static void update_gid_event_work_handler(struct work_struct *_work)
661{
662 struct update_gid_event_work *work =
663 container_of(_work, struct update_gid_event_work, work);
664
665 ib_enum_all_roce_netdevs(is_eth_port_of_netdev, work->gid_attr.ndev,
666 callback_for_addr_gid_device_scan, work);
667
668 dev_put(work->gid_attr.ndev);
669 kfree(work);
670}
671
672static int addr_event(struct notifier_block *this, unsigned long event,
673 struct sockaddr *sa, struct net_device *ndev)
674{
675 struct update_gid_event_work *work;
676 enum gid_op_type gid_op;
677
678 if (ndev->type != ARPHRD_ETHER)
679 return NOTIFY_DONE;
680
681 switch (event) {
682 case NETDEV_UP:
683 gid_op = GID_ADD;
684 break;
685
686 case NETDEV_DOWN:
687 gid_op = GID_DEL;
688 break;
689
690 default:
691 return NOTIFY_DONE;
692 }
693
694 work = kmalloc(sizeof(*work), GFP_ATOMIC);
695 if (!work) {
696 pr_warn("roce_gid_mgmt: Couldn't allocate work for addr_event\n");
697 return NOTIFY_DONE;
698 }
699
700 INIT_WORK(&work->work, update_gid_event_work_handler);
701
702 rdma_ip2gid(sa, &work->gid);
703 work->gid_op = gid_op;
704
705 memset(&work->gid_attr, 0, sizeof(work->gid_attr));
706 dev_hold(ndev);
707 work->gid_attr.ndev = ndev;
708
709 queue_work(ib_wq, &work->work);
710
711 return NOTIFY_DONE;
712}
713
714static int inetaddr_event(struct notifier_block *this, unsigned long event,
715 void *ptr)
716{
717 struct sockaddr_in in;
718 struct net_device *ndev;
719 struct in_ifaddr *ifa = ptr;
720
721 in.sin_family = AF_INET;
722 in.sin_addr.s_addr = ifa->ifa_address;
723 ndev = ifa->ifa_dev->dev;
724
725 return addr_event(this, event, (struct sockaddr *)&in, ndev);
726}
727
728static int inet6addr_event(struct notifier_block *this, unsigned long event,
729 void *ptr)
730{
731 struct sockaddr_in6 in6;
732 struct net_device *ndev;
733 struct inet6_ifaddr *ifa6 = ptr;
734
735 in6.sin6_family = AF_INET6;
736 in6.sin6_addr = ifa6->addr;
737 ndev = ifa6->idev->dev;
738
739 return addr_event(this, event, (struct sockaddr *)&in6, ndev);
740}
741
742static struct notifier_block nb_netdevice = {
743 .notifier_call = netdevice_event
744};
745
746static struct notifier_block nb_inetaddr = {
747 .notifier_call = inetaddr_event
748};
749
750static struct notifier_block nb_inet6addr = {
751 .notifier_call = inet6addr_event
752};
753
754int __init roce_gid_mgmt_init(void)
755{
756 register_inetaddr_notifier(&nb_inetaddr);
757 if (IS_ENABLED(CONFIG_IPV6))
758 register_inet6addr_notifier(&nb_inet6addr);
759 /* We relay on the netdevice notifier to enumerate all
760 * existing devices in the system. Register to this notifier
761 * last to make sure we will not miss any IP add/del
762 * callbacks.
763 */
764 register_netdevice_notifier(&nb_netdevice);
765
766 return 0;
767}
768
769void __exit roce_gid_mgmt_cleanup(void)
770{
771 if (IS_ENABLED(CONFIG_IPV6))
772 unregister_inet6addr_notifier(&nb_inet6addr);
773 unregister_inetaddr_notifier(&nb_inetaddr);
774 unregister_netdevice_notifier(&nb_netdevice);
775 /* Ensure all gid deletion tasks complete before we go down,
776 * to avoid any reference to free'd memory. By the time
777 * ib-core is removed, all physical devices have been removed,
778 * so no issue with remaining hardware contexts.
779 */
780}
Linux kernel - Deliverables
This page took 0.124245 seconds and 5 git commands to generate.