1e73b5e51SJohannes Berg // SPDX-License-Identifier: GPL-2.0-only
2e73b5e51SJohannes Berg /*
3e73b5e51SJohannes Berg * MLO link handling
4e73b5e51SJohannes Berg *
501605ad6SJohannes Berg * Copyright (C) 2022-2023 Intel Corporation
6e73b5e51SJohannes Berg */
7e73b5e51SJohannes Berg #include <linux/slab.h>
8e73b5e51SJohannes Berg #include <linux/kernel.h>
9e73b5e51SJohannes Berg #include <net/mac80211.h>
10e73b5e51SJohannes Berg #include "ieee80211_i.h"
11e73b5e51SJohannes Berg #include "driver-ops.h"
123d901102SJohannes Berg #include "key.h"
13170cd6a6SBenjamin Berg #include "debugfs_netdev.h"
14e73b5e51SJohannes Berg
ieee80211_link_setup(struct ieee80211_link_data * link)15e73b5e51SJohannes Berg void ieee80211_link_setup(struct ieee80211_link_data *link)
16e73b5e51SJohannes Berg {
17e73b5e51SJohannes Berg if (link->sdata->vif.type == NL80211_IFTYPE_STATION)
18e73b5e51SJohannes Berg ieee80211_mgd_setup_link(link);
19e73b5e51SJohannes Berg }
20e73b5e51SJohannes Berg
ieee80211_link_init(struct ieee80211_sub_if_data * sdata,int link_id,struct ieee80211_link_data * link,struct ieee80211_bss_conf * link_conf)21e73b5e51SJohannes Berg void ieee80211_link_init(struct ieee80211_sub_if_data *sdata,
22e73b5e51SJohannes Berg int link_id,
23e73b5e51SJohannes Berg struct ieee80211_link_data *link,
24e73b5e51SJohannes Berg struct ieee80211_bss_conf *link_conf)
25e73b5e51SJohannes Berg {
26e73b5e51SJohannes Berg bool deflink = link_id < 0;
27e73b5e51SJohannes Berg
28e73b5e51SJohannes Berg if (link_id < 0)
29e73b5e51SJohannes Berg link_id = 0;
30e73b5e51SJohannes Berg
31e73b5e51SJohannes Berg rcu_assign_pointer(sdata->vif.link_conf[link_id], link_conf);
32e73b5e51SJohannes Berg rcu_assign_pointer(sdata->link[link_id], link);
33e73b5e51SJohannes Berg
34e73b5e51SJohannes Berg link->sdata = sdata;
35e73b5e51SJohannes Berg link->link_id = link_id;
36e73b5e51SJohannes Berg link->conf = link_conf;
37e73b5e51SJohannes Berg link_conf->link_id = link_id;
38e1f113ccSBenjamin Berg link_conf->vif = &sdata->vif;
39e73b5e51SJohannes Berg
40e73b5e51SJohannes Berg INIT_WORK(&link->csa_finalize_work,
41e73b5e51SJohannes Berg ieee80211_csa_finalize_work);
42e73b5e51SJohannes Berg INIT_WORK(&link->color_change_finalize_work,
43e73b5e51SJohannes Berg ieee80211_color_change_finalize_work);
4492881884SLorenzo Bianconi INIT_DELAYED_WORK(&link->color_collision_detect_work,
4592881884SLorenzo Bianconi ieee80211_color_collision_detection_work);
46e73b5e51SJohannes Berg INIT_LIST_HEAD(&link->assigned_chanctx_list);
47e73b5e51SJohannes Berg INIT_LIST_HEAD(&link->reserved_chanctx_list);
48e73b5e51SJohannes Berg INIT_DELAYED_WORK(&link->dfs_cac_timer_work,
49e73b5e51SJohannes Berg ieee80211_dfs_cac_timer_work);
50e73b5e51SJohannes Berg
51e73b5e51SJohannes Berg if (!deflink) {
52e73b5e51SJohannes Berg switch (sdata->vif.type) {
53e73b5e51SJohannes Berg case NL80211_IFTYPE_AP:
54e73b5e51SJohannes Berg ether_addr_copy(link_conf->addr,
55e73b5e51SJohannes Berg sdata->wdev.links[link_id].addr);
56e73b5e51SJohannes Berg link_conf->bssid = link_conf->addr;
57e73b5e51SJohannes Berg WARN_ON(!(sdata->wdev.valid_links & BIT(link_id)));
58e73b5e51SJohannes Berg break;
59e73b5e51SJohannes Berg case NL80211_IFTYPE_STATION:
60e73b5e51SJohannes Berg /* station sets the bssid in ieee80211_mgd_setup_link */
61e73b5e51SJohannes Berg break;
62e73b5e51SJohannes Berg default:
63e73b5e51SJohannes Berg WARN_ON(1);
64e73b5e51SJohannes Berg }
65170cd6a6SBenjamin Berg
66170cd6a6SBenjamin Berg ieee80211_link_debugfs_add(link);
67e73b5e51SJohannes Berg }
68e73b5e51SJohannes Berg }
69e73b5e51SJohannes Berg
ieee80211_link_stop(struct ieee80211_link_data * link)70e73b5e51SJohannes Berg void ieee80211_link_stop(struct ieee80211_link_data *link)
71e73b5e51SJohannes Berg {
72e73b5e51SJohannes Berg if (link->sdata->vif.type == NL80211_IFTYPE_STATION)
73e73b5e51SJohannes Berg ieee80211_mgd_stop_link(link);
74e73b5e51SJohannes Berg
7592881884SLorenzo Bianconi cancel_delayed_work_sync(&link->color_collision_detect_work);
76e73b5e51SJohannes Berg ieee80211_link_release_channel(link);
77e73b5e51SJohannes Berg }
78e73b5e51SJohannes Berg
79e73b5e51SJohannes Berg struct link_container {
80e73b5e51SJohannes Berg struct ieee80211_link_data data;
81e73b5e51SJohannes Berg struct ieee80211_bss_conf conf;
82e73b5e51SJohannes Berg };
83e73b5e51SJohannes Berg
ieee80211_tear_down_links(struct ieee80211_sub_if_data * sdata,struct link_container ** links,u16 mask)84efe9c2bfSJohannes Berg static void ieee80211_tear_down_links(struct ieee80211_sub_if_data *sdata,
85efe9c2bfSJohannes Berg struct link_container **links, u16 mask)
86e73b5e51SJohannes Berg {
87efe9c2bfSJohannes Berg struct ieee80211_link_data *link;
88e73b5e51SJohannes Berg LIST_HEAD(keys);
89e73b5e51SJohannes Berg unsigned int link_id;
90e73b5e51SJohannes Berg
91e73b5e51SJohannes Berg for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
92efe9c2bfSJohannes Berg if (!(mask & BIT(link_id)))
93e73b5e51SJohannes Berg continue;
94efe9c2bfSJohannes Berg link = &links[link_id]->data;
95efe9c2bfSJohannes Berg if (link_id == 0 && !link)
96efe9c2bfSJohannes Berg link = &sdata->deflink;
97efe9c2bfSJohannes Berg if (WARN_ON(!link))
98efe9c2bfSJohannes Berg continue;
99efe9c2bfSJohannes Berg ieee80211_remove_link_keys(link, &keys);
100170cd6a6SBenjamin Berg ieee80211_link_debugfs_remove(link);
101efe9c2bfSJohannes Berg ieee80211_link_stop(link);
102e73b5e51SJohannes Berg }
103e73b5e51SJohannes Berg
104e73b5e51SJohannes Berg synchronize_rcu();
105e73b5e51SJohannes Berg
106e73b5e51SJohannes Berg ieee80211_free_key_list(sdata->local, &keys);
107e73b5e51SJohannes Berg }
108efe9c2bfSJohannes Berg
ieee80211_free_links(struct ieee80211_sub_if_data * sdata,struct link_container ** links)109efe9c2bfSJohannes Berg static void ieee80211_free_links(struct ieee80211_sub_if_data *sdata,
110efe9c2bfSJohannes Berg struct link_container **links)
111efe9c2bfSJohannes Berg {
112efe9c2bfSJohannes Berg unsigned int link_id;
113efe9c2bfSJohannes Berg
114efe9c2bfSJohannes Berg for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++)
115efe9c2bfSJohannes Berg kfree(links[link_id]);
116e73b5e51SJohannes Berg }
117e73b5e51SJohannes Berg
ieee80211_check_dup_link_addrs(struct ieee80211_sub_if_data * sdata)118e73b5e51SJohannes Berg static int ieee80211_check_dup_link_addrs(struct ieee80211_sub_if_data *sdata)
119e73b5e51SJohannes Berg {
120e73b5e51SJohannes Berg unsigned int i, j;
121e73b5e51SJohannes Berg
122e73b5e51SJohannes Berg for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
123e73b5e51SJohannes Berg struct ieee80211_link_data *link1;
124e73b5e51SJohannes Berg
125e73b5e51SJohannes Berg link1 = sdata_dereference(sdata->link[i], sdata);
126e73b5e51SJohannes Berg if (!link1)
127e73b5e51SJohannes Berg continue;
128e73b5e51SJohannes Berg for (j = i + 1; j < IEEE80211_MLD_MAX_NUM_LINKS; j++) {
129e73b5e51SJohannes Berg struct ieee80211_link_data *link2;
130e73b5e51SJohannes Berg
131e73b5e51SJohannes Berg link2 = sdata_dereference(sdata->link[j], sdata);
132e73b5e51SJohannes Berg if (!link2)
133e73b5e51SJohannes Berg continue;
134e73b5e51SJohannes Berg
135e73b5e51SJohannes Berg if (ether_addr_equal(link1->conf->addr,
136e73b5e51SJohannes Berg link2->conf->addr))
137e73b5e51SJohannes Berg return -EALREADY;
138e73b5e51SJohannes Berg }
139e73b5e51SJohannes Berg }
140e73b5e51SJohannes Berg
141e73b5e51SJohannes Berg return 0;
142e73b5e51SJohannes Berg }
143e73b5e51SJohannes Berg
ieee80211_set_vif_links_bitmaps(struct ieee80211_sub_if_data * sdata,u16 valid_links,u16 dormant_links)144efe9c2bfSJohannes Berg static void ieee80211_set_vif_links_bitmaps(struct ieee80211_sub_if_data *sdata,
1456d543b34SIlan Peer u16 valid_links, u16 dormant_links)
146efe9c2bfSJohannes Berg {
1476d543b34SIlan Peer sdata->vif.valid_links = valid_links;
1486d543b34SIlan Peer sdata->vif.dormant_links = dormant_links;
149efe9c2bfSJohannes Berg
1506d543b34SIlan Peer if (!valid_links ||
1516d543b34SIlan Peer WARN((~valid_links & dormant_links) ||
1526d543b34SIlan Peer !(valid_links & ~dormant_links),
1536d543b34SIlan Peer "Invalid links: valid=0x%x, dormant=0x%x",
1546d543b34SIlan Peer valid_links, dormant_links)) {
155efe9c2bfSJohannes Berg sdata->vif.active_links = 0;
1566d543b34SIlan Peer sdata->vif.dormant_links = 0;
157efe9c2bfSJohannes Berg return;
158efe9c2bfSJohannes Berg }
159efe9c2bfSJohannes Berg
160efe9c2bfSJohannes Berg switch (sdata->vif.type) {
161efe9c2bfSJohannes Berg case NL80211_IFTYPE_AP:
162efe9c2bfSJohannes Berg /* in an AP all links are always active */
1636d543b34SIlan Peer sdata->vif.active_links = valid_links;
1646d543b34SIlan Peer
1656d543b34SIlan Peer /* AP links are not expected to be disabled */
1666d543b34SIlan Peer WARN_ON(dormant_links);
167efe9c2bfSJohannes Berg break;
168efe9c2bfSJohannes Berg case NL80211_IFTYPE_STATION:
169efe9c2bfSJohannes Berg if (sdata->vif.active_links)
170efe9c2bfSJohannes Berg break;
1716d543b34SIlan Peer sdata->vif.active_links = valid_links & ~dormant_links;
1726d543b34SIlan Peer WARN_ON(hweight16(sdata->vif.active_links) > 1);
173efe9c2bfSJohannes Berg break;
174efe9c2bfSJohannes Berg default:
175efe9c2bfSJohannes Berg WARN_ON(1);
176efe9c2bfSJohannes Berg }
177efe9c2bfSJohannes Berg }
178efe9c2bfSJohannes Berg
ieee80211_vif_update_links(struct ieee80211_sub_if_data * sdata,struct link_container ** to_free,u16 new_links,u16 dormant_links)179e73b5e51SJohannes Berg static int ieee80211_vif_update_links(struct ieee80211_sub_if_data *sdata,
180e73b5e51SJohannes Berg struct link_container **to_free,
1816d543b34SIlan Peer u16 new_links, u16 dormant_links)
182e73b5e51SJohannes Berg {
183e73b5e51SJohannes Berg u16 old_links = sdata->vif.valid_links;
184efe9c2bfSJohannes Berg u16 old_active = sdata->vif.active_links;
185e73b5e51SJohannes Berg unsigned long add = new_links & ~old_links;
186e73b5e51SJohannes Berg unsigned long rem = old_links & ~new_links;
187e73b5e51SJohannes Berg unsigned int link_id;
188e73b5e51SJohannes Berg int ret;
189e73b5e51SJohannes Berg struct link_container *links[IEEE80211_MLD_MAX_NUM_LINKS] = {}, *link;
190e73b5e51SJohannes Berg struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS];
191e73b5e51SJohannes Berg struct ieee80211_link_data *old_data[IEEE80211_MLD_MAX_NUM_LINKS];
192e73b5e51SJohannes Berg bool use_deflink = old_links == 0; /* set for error case */
193e73b5e51SJohannes Berg
194e73b5e51SJohannes Berg sdata_assert_lock(sdata);
195e73b5e51SJohannes Berg
196e73b5e51SJohannes Berg memset(to_free, 0, sizeof(links));
197e73b5e51SJohannes Berg
198*ca33ea83SIlan Peer if (old_links == new_links && dormant_links == sdata->vif.dormant_links)
199e73b5e51SJohannes Berg return 0;
200e73b5e51SJohannes Berg
201e73b5e51SJohannes Berg /* if there were no old links, need to clear the pointers to deflink */
202e73b5e51SJohannes Berg if (!old_links)
203e73b5e51SJohannes Berg rem |= BIT(0);
204e73b5e51SJohannes Berg
205e73b5e51SJohannes Berg /* allocate new link structures first */
206e73b5e51SJohannes Berg for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) {
207e73b5e51SJohannes Berg link = kzalloc(sizeof(*link), GFP_KERNEL);
208e73b5e51SJohannes Berg if (!link) {
209e73b5e51SJohannes Berg ret = -ENOMEM;
210e73b5e51SJohannes Berg goto free;
211e73b5e51SJohannes Berg }
212e73b5e51SJohannes Berg links[link_id] = link;
213e73b5e51SJohannes Berg }
214e73b5e51SJohannes Berg
215e73b5e51SJohannes Berg /* keep track of the old pointers for the driver */
216e73b5e51SJohannes Berg BUILD_BUG_ON(sizeof(old) != sizeof(sdata->vif.link_conf));
217e73b5e51SJohannes Berg memcpy(old, sdata->vif.link_conf, sizeof(old));
218e73b5e51SJohannes Berg /* and for us in error cases */
219e73b5e51SJohannes Berg BUILD_BUG_ON(sizeof(old_data) != sizeof(sdata->link));
220e73b5e51SJohannes Berg memcpy(old_data, sdata->link, sizeof(old_data));
221e73b5e51SJohannes Berg
222e73b5e51SJohannes Berg /* grab old links to free later */
223e73b5e51SJohannes Berg for_each_set_bit(link_id, &rem, IEEE80211_MLD_MAX_NUM_LINKS) {
224e73b5e51SJohannes Berg if (rcu_access_pointer(sdata->link[link_id]) != &sdata->deflink) {
225e73b5e51SJohannes Berg /*
226e73b5e51SJohannes Berg * we must have allocated the data through this path so
227e73b5e51SJohannes Berg * we know we can free both at the same time
228e73b5e51SJohannes Berg */
229e73b5e51SJohannes Berg to_free[link_id] = container_of(rcu_access_pointer(sdata->link[link_id]),
230e73b5e51SJohannes Berg typeof(*links[link_id]),
231e73b5e51SJohannes Berg data);
232e73b5e51SJohannes Berg }
233e73b5e51SJohannes Berg
234e73b5e51SJohannes Berg RCU_INIT_POINTER(sdata->link[link_id], NULL);
235e73b5e51SJohannes Berg RCU_INIT_POINTER(sdata->vif.link_conf[link_id], NULL);
236e73b5e51SJohannes Berg }
237e73b5e51SJohannes Berg
238e73b5e51SJohannes Berg /* link them into data structures */
239e73b5e51SJohannes Berg for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) {
240e73b5e51SJohannes Berg WARN_ON(!use_deflink &&
241e73b5e51SJohannes Berg rcu_access_pointer(sdata->link[link_id]) == &sdata->deflink);
242e73b5e51SJohannes Berg
243e73b5e51SJohannes Berg link = links[link_id];
244e73b5e51SJohannes Berg ieee80211_link_init(sdata, link_id, &link->data, &link->conf);
245e73b5e51SJohannes Berg ieee80211_link_setup(&link->data);
246e73b5e51SJohannes Berg }
247e73b5e51SJohannes Berg
248e73b5e51SJohannes Berg if (new_links == 0)
249e73b5e51SJohannes Berg ieee80211_link_init(sdata, -1, &sdata->deflink,
250e73b5e51SJohannes Berg &sdata->vif.bss_conf);
251e73b5e51SJohannes Berg
252e73b5e51SJohannes Berg ret = ieee80211_check_dup_link_addrs(sdata);
253e73b5e51SJohannes Berg if (!ret) {
254efe9c2bfSJohannes Berg /* for keys we will not be able to undo this */
255efe9c2bfSJohannes Berg ieee80211_tear_down_links(sdata, to_free, rem);
256efe9c2bfSJohannes Berg
2576d543b34SIlan Peer ieee80211_set_vif_links_bitmaps(sdata, new_links, dormant_links);
258efe9c2bfSJohannes Berg
259e73b5e51SJohannes Berg /* tell the driver */
260e73b5e51SJohannes Berg ret = drv_change_vif_links(sdata->local, sdata,
261efe9c2bfSJohannes Berg old_links & old_active,
262efe9c2bfSJohannes Berg new_links & sdata->vif.active_links,
263e73b5e51SJohannes Berg old);
264e73b5e51SJohannes Berg }
265e73b5e51SJohannes Berg
266e73b5e51SJohannes Berg if (ret) {
267e73b5e51SJohannes Berg /* restore config */
268e73b5e51SJohannes Berg memcpy(sdata->link, old_data, sizeof(old_data));
269e73b5e51SJohannes Berg memcpy(sdata->vif.link_conf, old, sizeof(old));
2706d543b34SIlan Peer ieee80211_set_vif_links_bitmaps(sdata, old_links, dormant_links);
271e73b5e51SJohannes Berg /* and free (only) the newly allocated links */
272e73b5e51SJohannes Berg memset(to_free, 0, sizeof(links));
273e73b5e51SJohannes Berg goto free;
274e73b5e51SJohannes Berg }
275e73b5e51SJohannes Berg
276e73b5e51SJohannes Berg /* use deflink/bss_conf again if and only if there are no more links */
277e73b5e51SJohannes Berg use_deflink = new_links == 0;
278e73b5e51SJohannes Berg
279e73b5e51SJohannes Berg goto deinit;
280e73b5e51SJohannes Berg free:
281e73b5e51SJohannes Berg /* if we failed during allocation, only free all */
282e73b5e51SJohannes Berg for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
283e73b5e51SJohannes Berg kfree(links[link_id]);
284e73b5e51SJohannes Berg links[link_id] = NULL;
285e73b5e51SJohannes Berg }
286e73b5e51SJohannes Berg deinit:
287e73b5e51SJohannes Berg if (use_deflink)
288e73b5e51SJohannes Berg ieee80211_link_init(sdata, -1, &sdata->deflink,
289e73b5e51SJohannes Berg &sdata->vif.bss_conf);
290e73b5e51SJohannes Berg return ret;
291e73b5e51SJohannes Berg }
292e73b5e51SJohannes Berg
ieee80211_vif_set_links(struct ieee80211_sub_if_data * sdata,u16 new_links,u16 dormant_links)293e73b5e51SJohannes Berg int ieee80211_vif_set_links(struct ieee80211_sub_if_data *sdata,
2946d543b34SIlan Peer u16 new_links, u16 dormant_links)
295e73b5e51SJohannes Berg {
296e73b5e51SJohannes Berg struct link_container *links[IEEE80211_MLD_MAX_NUM_LINKS];
297e73b5e51SJohannes Berg int ret;
298e73b5e51SJohannes Berg
2996d543b34SIlan Peer ret = ieee80211_vif_update_links(sdata, links, new_links,
3006d543b34SIlan Peer dormant_links);
301e73b5e51SJohannes Berg ieee80211_free_links(sdata, links);
302e73b5e51SJohannes Berg
303e73b5e51SJohannes Berg return ret;
304e73b5e51SJohannes Berg }
305e73b5e51SJohannes Berg
ieee80211_vif_clear_links(struct ieee80211_sub_if_data * sdata)306e73b5e51SJohannes Berg void ieee80211_vif_clear_links(struct ieee80211_sub_if_data *sdata)
307e73b5e51SJohannes Berg {
308e73b5e51SJohannes Berg struct link_container *links[IEEE80211_MLD_MAX_NUM_LINKS];
309e73b5e51SJohannes Berg
310e73b5e51SJohannes Berg /*
311e73b5e51SJohannes Berg * The locking here is different because when we free links
312e73b5e51SJohannes Berg * in the station case we need to be able to cancel_work_sync()
313e73b5e51SJohannes Berg * something that also takes the lock.
314e73b5e51SJohannes Berg */
315e73b5e51SJohannes Berg
316e73b5e51SJohannes Berg sdata_lock(sdata);
3176d543b34SIlan Peer ieee80211_vif_update_links(sdata, links, 0, 0);
318e73b5e51SJohannes Berg sdata_unlock(sdata);
319e73b5e51SJohannes Berg
320e73b5e51SJohannes Berg ieee80211_free_links(sdata, links);
321e73b5e51SJohannes Berg }
3223d901102SJohannes Berg
_ieee80211_set_active_links(struct ieee80211_sub_if_data * sdata,u16 active_links)3233d901102SJohannes Berg static int _ieee80211_set_active_links(struct ieee80211_sub_if_data *sdata,
3243d901102SJohannes Berg u16 active_links)
3253d901102SJohannes Berg {
3263d901102SJohannes Berg struct ieee80211_bss_conf *link_confs[IEEE80211_MLD_MAX_NUM_LINKS];
3273d901102SJohannes Berg struct ieee80211_local *local = sdata->local;
3283d901102SJohannes Berg u16 old_active = sdata->vif.active_links;
3293d901102SJohannes Berg unsigned long rem = old_active & ~active_links;
3303d901102SJohannes Berg unsigned long add = active_links & ~old_active;
3313d901102SJohannes Berg struct sta_info *sta;
3323d901102SJohannes Berg unsigned int link_id;
3333d901102SJohannes Berg int ret, i;
3343d901102SJohannes Berg
3353d901102SJohannes Berg if (!ieee80211_sdata_running(sdata))
3363d901102SJohannes Berg return -ENETDOWN;
3373d901102SJohannes Berg
3383d901102SJohannes Berg if (sdata->vif.type != NL80211_IFTYPE_STATION)
3393d901102SJohannes Berg return -EINVAL;
3403d901102SJohannes Berg
341f1871abdSIlan Peer if (active_links & ~ieee80211_vif_usable_links(&sdata->vif))
3423d901102SJohannes Berg return -EINVAL;
3433d901102SJohannes Berg
3443d901102SJohannes Berg /* nothing to do */
3453d901102SJohannes Berg if (old_active == active_links)
3463d901102SJohannes Berg return 0;
3473d901102SJohannes Berg
3483d901102SJohannes Berg for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
3493d901102SJohannes Berg link_confs[i] = sdata_dereference(sdata->vif.link_conf[i],
3503d901102SJohannes Berg sdata);
3513d901102SJohannes Berg
3523d901102SJohannes Berg if (add) {
3533d901102SJohannes Berg sdata->vif.active_links |= active_links;
3543d901102SJohannes Berg ret = drv_change_vif_links(local, sdata,
3553d901102SJohannes Berg old_active,
3563d901102SJohannes Berg sdata->vif.active_links,
3573d901102SJohannes Berg link_confs);
3583d901102SJohannes Berg if (ret) {
3593d901102SJohannes Berg sdata->vif.active_links = old_active;
3603d901102SJohannes Berg return ret;
3613d901102SJohannes Berg }
3623d901102SJohannes Berg }
3633d901102SJohannes Berg
3643d901102SJohannes Berg for_each_set_bit(link_id, &rem, IEEE80211_MLD_MAX_NUM_LINKS) {
3653d901102SJohannes Berg struct ieee80211_link_data *link;
3663d901102SJohannes Berg
3673d901102SJohannes Berg link = sdata_dereference(sdata->link[link_id], sdata);
3683d901102SJohannes Berg
3693d901102SJohannes Berg /* FIXME: kill TDLS connections on the link */
3703d901102SJohannes Berg
3713d901102SJohannes Berg ieee80211_link_release_channel(link);
3723d901102SJohannes Berg }
3733d901102SJohannes Berg
3743d901102SJohannes Berg list_for_each_entry(sta, &local->sta_list, list) {
3753d901102SJohannes Berg if (sdata != sta->sdata)
3763d901102SJohannes Berg continue;
3779b41a9d7SJohannes Berg
3789b41a9d7SJohannes Berg /* this is very temporary, but do it anyway */
3799b41a9d7SJohannes Berg __ieee80211_sta_recalc_aggregates(sta,
3809b41a9d7SJohannes Berg old_active | active_links);
3819b41a9d7SJohannes Berg
3823d901102SJohannes Berg ret = drv_change_sta_links(local, sdata, &sta->sta,
3833d901102SJohannes Berg old_active,
3843d901102SJohannes Berg old_active | active_links);
3853d901102SJohannes Berg WARN_ON_ONCE(ret);
3863d901102SJohannes Berg }
3873d901102SJohannes Berg
3883d901102SJohannes Berg ret = ieee80211_key_switch_links(sdata, rem, add);
3893d901102SJohannes Berg WARN_ON_ONCE(ret);
3903d901102SJohannes Berg
3913d901102SJohannes Berg list_for_each_entry(sta, &local->sta_list, list) {
3923d901102SJohannes Berg if (sdata != sta->sdata)
3933d901102SJohannes Berg continue;
3949b41a9d7SJohannes Berg
3959b41a9d7SJohannes Berg __ieee80211_sta_recalc_aggregates(sta, active_links);
3969b41a9d7SJohannes Berg
3973d901102SJohannes Berg ret = drv_change_sta_links(local, sdata, &sta->sta,
3983d901102SJohannes Berg old_active | active_links,
3993d901102SJohannes Berg active_links);
4003d901102SJohannes Berg WARN_ON_ONCE(ret);
4019b41a9d7SJohannes Berg
4029b41a9d7SJohannes Berg /*
4039b41a9d7SJohannes Berg * Do it again, just in case - the driver might very
4049b41a9d7SJohannes Berg * well have called ieee80211_sta_recalc_aggregates()
4059b41a9d7SJohannes Berg * from there when filling in the new links, which
4069b41a9d7SJohannes Berg * would set it wrong since the vif's active links are
4079b41a9d7SJohannes Berg * not switched yet...
4089b41a9d7SJohannes Berg */
4099b41a9d7SJohannes Berg __ieee80211_sta_recalc_aggregates(sta, active_links);
4103d901102SJohannes Berg }
4113d901102SJohannes Berg
4123d901102SJohannes Berg for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) {
4133d901102SJohannes Berg struct ieee80211_link_data *link;
4143d901102SJohannes Berg
4153d901102SJohannes Berg link = sdata_dereference(sdata->link[link_id], sdata);
4163d901102SJohannes Berg
4173d901102SJohannes Berg ret = ieee80211_link_use_channel(link, &link->conf->chandef,
4183d901102SJohannes Berg IEEE80211_CHANCTX_SHARED);
4193d901102SJohannes Berg WARN_ON_ONCE(ret);
4203d901102SJohannes Berg
42101605ad6SJohannes Berg ieee80211_mgd_set_link_qos_params(link);
4223d901102SJohannes Berg ieee80211_link_info_change_notify(sdata, link,
4233d901102SJohannes Berg BSS_CHANGED_ERP_CTS_PROT |
4243d901102SJohannes Berg BSS_CHANGED_ERP_PREAMBLE |
4253d901102SJohannes Berg BSS_CHANGED_ERP_SLOT |
4263d901102SJohannes Berg BSS_CHANGED_HT |
4273d901102SJohannes Berg BSS_CHANGED_BASIC_RATES |
4283d901102SJohannes Berg BSS_CHANGED_BSSID |
4293d901102SJohannes Berg BSS_CHANGED_CQM |
4303d901102SJohannes Berg BSS_CHANGED_QOS |
4313d901102SJohannes Berg BSS_CHANGED_TXPOWER |
4323d901102SJohannes Berg BSS_CHANGED_BANDWIDTH |
4333d901102SJohannes Berg BSS_CHANGED_TWT |
4343d901102SJohannes Berg BSS_CHANGED_HE_OBSS_PD |
4353d901102SJohannes Berg BSS_CHANGED_HE_BSS_COLOR);
4363d901102SJohannes Berg }
4373d901102SJohannes Berg
4383d901102SJohannes Berg old_active = sdata->vif.active_links;
4393d901102SJohannes Berg sdata->vif.active_links = active_links;
4403d901102SJohannes Berg
4413d901102SJohannes Berg if (rem) {
4423d901102SJohannes Berg ret = drv_change_vif_links(local, sdata, old_active,
4433d901102SJohannes Berg active_links, link_confs);
4443d901102SJohannes Berg WARN_ON_ONCE(ret);
4453d901102SJohannes Berg }
4463d901102SJohannes Berg
4473d901102SJohannes Berg return 0;
4483d901102SJohannes Berg }
4493d901102SJohannes Berg
__ieee80211_set_active_links(struct ieee80211_vif * vif,u16 active_links)45079973d5cSBenjamin Berg int __ieee80211_set_active_links(struct ieee80211_vif *vif, u16 active_links)
4513d901102SJohannes Berg {
4523d901102SJohannes Berg struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
4533d901102SJohannes Berg struct ieee80211_local *local = sdata->local;
4543d901102SJohannes Berg u16 old_active;
4553d901102SJohannes Berg int ret;
4563d901102SJohannes Berg
45779973d5cSBenjamin Berg sdata_assert_lock(sdata);
4583d901102SJohannes Berg mutex_lock(&local->sta_mtx);
4593d901102SJohannes Berg mutex_lock(&local->mtx);
4603d901102SJohannes Berg mutex_lock(&local->key_mtx);
4613d901102SJohannes Berg old_active = sdata->vif.active_links;
4623d901102SJohannes Berg if (old_active & active_links) {
4633d901102SJohannes Berg /*
4643d901102SJohannes Berg * if there's at least one link that stays active across
4653d901102SJohannes Berg * the change then switch to it (to those) first, and
4663d901102SJohannes Berg * then enable the additional links
4673d901102SJohannes Berg */
4683d901102SJohannes Berg ret = _ieee80211_set_active_links(sdata,
4693d901102SJohannes Berg old_active & active_links);
4703d901102SJohannes Berg if (!ret)
4713d901102SJohannes Berg ret = _ieee80211_set_active_links(sdata, active_links);
4723d901102SJohannes Berg } else {
4733d901102SJohannes Berg /* otherwise switch directly */
4743d901102SJohannes Berg ret = _ieee80211_set_active_links(sdata, active_links);
4753d901102SJohannes Berg }
4763d901102SJohannes Berg mutex_unlock(&local->key_mtx);
4773d901102SJohannes Berg mutex_unlock(&local->mtx);
4783d901102SJohannes Berg mutex_unlock(&local->sta_mtx);
47979973d5cSBenjamin Berg
48079973d5cSBenjamin Berg return ret;
48179973d5cSBenjamin Berg }
48279973d5cSBenjamin Berg
ieee80211_set_active_links(struct ieee80211_vif * vif,u16 active_links)48379973d5cSBenjamin Berg int ieee80211_set_active_links(struct ieee80211_vif *vif, u16 active_links)
48479973d5cSBenjamin Berg {
48579973d5cSBenjamin Berg struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
48679973d5cSBenjamin Berg int ret;
48779973d5cSBenjamin Berg
48879973d5cSBenjamin Berg sdata_lock(sdata);
48979973d5cSBenjamin Berg ret = __ieee80211_set_active_links(vif, active_links);
4903d901102SJohannes Berg sdata_unlock(sdata);
4913d901102SJohannes Berg
4923d901102SJohannes Berg return ret;
4933d901102SJohannes Berg }
4943d901102SJohannes Berg EXPORT_SYMBOL_GPL(ieee80211_set_active_links);
4953d901102SJohannes Berg
ieee80211_set_active_links_async(struct ieee80211_vif * vif,u16 active_links)4963d901102SJohannes Berg void ieee80211_set_active_links_async(struct ieee80211_vif *vif,
4973d901102SJohannes Berg u16 active_links)
4983d901102SJohannes Berg {
4993d901102SJohannes Berg struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
5003d901102SJohannes Berg
5013d901102SJohannes Berg if (!ieee80211_sdata_running(sdata))
5023d901102SJohannes Berg return;
5033d901102SJohannes Berg
5043d901102SJohannes Berg if (sdata->vif.type != NL80211_IFTYPE_STATION)
5053d901102SJohannes Berg return;
5063d901102SJohannes Berg
507f1871abdSIlan Peer if (active_links & ~ieee80211_vif_usable_links(&sdata->vif))
5083d901102SJohannes Berg return;
5093d901102SJohannes Berg
5103d901102SJohannes Berg /* nothing to do */
5113d901102SJohannes Berg if (sdata->vif.active_links == active_links)
5123d901102SJohannes Berg return;
5133d901102SJohannes Berg
5143d901102SJohannes Berg sdata->desired_active_links = active_links;
5153d901102SJohannes Berg schedule_work(&sdata->activate_links_work);
5163d901102SJohannes Berg }
5173d901102SJohannes Berg EXPORT_SYMBOL_GPL(ieee80211_set_active_links_async);
518