ieee80211_is_data(hdr->frame_control);
}
+/**
+ * ieee80211_set_active_links - set active links in client mode
+ * @vif: interface to set active links on
+ * @active_links: the new active links bitmap
+ *
+ * This changes the active links on an interface. The interface
+ * must be in client mode (in AP mode, all links are always active),
+ * and @active_links must be a subset of the vif's valid_links.
+ *
+ * If a link is switched off and another is switched on at the same
+ * time (e.g. active_links going from 0x1 to 0x10) then you will get
+ * a sequence of calls like
+ * - change_vif_links(0x11)
+ * - unassign_vif_chanctx(link_id=0)
+ * - change_sta_links(0x11) for each affected STA (the AP)
+ * (TDLS connections on now inactive links should be torn down)
+ * - remove group keys on the old link (link_id 0)
+ * - add new group keys (GTK/IGTK/BIGTK) on the new link (link_id 4)
+ * - change_sta_links(0x10) for each affected STA (the AP)
+ * - assign_vif_chanctx(link_id=4)
+ * - change_vif_links(0x10)
+ *
+ * Note: This function acquires some mac80211 locks and must not
+ * be called with any driver locks held that could cause a
+ * lock dependency inversion. Best call it without locks.
+ */
+int ieee80211_set_active_links(struct ieee80211_vif *vif, u16 active_links);
+
+/**
+ * ieee80211_set_active_links_async - asynchronously set active links
+ * @vif: interface to set active links on
+ * @active_links: the new active links bitmap
+ *
+ * See ieee80211_set_active_links() for more information, the only
+ * difference here is that the link change is triggered async and
+ * can be called in any context, but the link switch will only be
+ * completed after it returns.
+ */
+void ieee80211_set_active_links_async(struct ieee80211_vif *vif,
+ u16 active_links);
+
#endif /* MAC80211_H */
}
IEEE80211_IF_FILE_RW(tsf);
+static ssize_t ieee80211_if_fmt_valid_links(const struct ieee80211_sub_if_data *sdata,
+ char *buf, int buflen)
+{
+ return snprintf(buf, buflen, "0x%x\n", sdata->vif.valid_links);
+}
+IEEE80211_IF_FILE_R(valid_links);
+
+static ssize_t ieee80211_if_fmt_active_links(const struct ieee80211_sub_if_data *sdata,
+ char *buf, int buflen)
+{
+ return snprintf(buf, buflen, "0x%x\n", sdata->vif.active_links);
+}
+
+static ssize_t ieee80211_if_parse_active_links(struct ieee80211_sub_if_data *sdata,
+ const char *buf, int buflen)
+{
+ u16 active_links;
+
+ if (kstrtou16(buf, 0, &active_links))
+ return -EINVAL;
+
+ return ieee80211_set_active_links(&sdata->vif, active_links) ?: buflen;
+}
+IEEE80211_IF_FILE_RW(active_links);
#ifdef CONFIG_MAC80211_MESH
IEEE80211_IF_FILE(estab_plinks, u.mesh.estab_plinks, ATOMIC);
DEBUGFS_ADD_MODE(uapsd_queues, 0600);
DEBUGFS_ADD_MODE(uapsd_max_sp_len, 0600);
DEBUGFS_ADD_MODE(tdls_wider_bw, 0600);
+ DEBUGFS_ADD_MODE(valid_links, 0200);
+ DEBUGFS_ADD_MODE(active_links, 0600);
}
static void add_ap_files(struct ieee80211_sub_if_data *sdata)
struct ieee80211_link_data deflink;
struct ieee80211_link_data __rcu *link[IEEE80211_MLD_MAX_NUM_LINKS];
+ /* for ieee80211_set_active_links_async() */
+ struct work_struct activate_links_work;
+ u16 desired_active_links;
+
#ifdef CONFIG_MAC80211_DEBUGFS
struct {
struct dentry *subdir_stations;
ieee80211_stop_mbssid(sdata);
}
+ cancel_work_sync(&sdata->activate_links_work);
+
wiphy_lock(sdata->local->hw.wiphy);
ieee80211_do_stop(sdata, true);
wiphy_unlock(sdata->local->hw.wiphy);
ieee80211_recalc_smps(sdata, &sdata->deflink);
}
+static void ieee80211_activate_links_work(struct work_struct *work)
+{
+ struct ieee80211_sub_if_data *sdata =
+ container_of(work, struct ieee80211_sub_if_data,
+ activate_links_work);
+
+ ieee80211_set_active_links(&sdata->vif, sdata->desired_active_links);
+}
+
/*
* Helper function to initialise an interface to a specific type.
*/
skb_queue_head_init(&sdata->status_queue);
INIT_WORK(&sdata->work, ieee80211_iface_work);
INIT_WORK(&sdata->recalc_smps, ieee80211_recalc_smps_work);
+ INIT_WORK(&sdata->activate_links_work, ieee80211_activate_links_work);
switch (type) {
case NL80211_IFTYPE_P2P_GO:
}
}
EXPORT_SYMBOL_GPL(ieee80211_key_replay);
+
+int ieee80211_key_switch_links(struct ieee80211_sub_if_data *sdata,
+ unsigned long del_links_mask,
+ unsigned long add_links_mask)
+{
+ struct ieee80211_key *key;
+ int ret;
+
+ list_for_each_entry(key, &sdata->key_list, list) {
+ if (key->conf.link_id < 0 ||
+ !(del_links_mask & BIT(key->conf.link_id)))
+ continue;
+
+ /* shouldn't happen for per-link keys */
+ WARN_ON(key->sta);
+
+ ieee80211_key_disable_hw_accel(key);
+ }
+
+ list_for_each_entry(key, &sdata->key_list, list) {
+ if (key->conf.link_id < 0 ||
+ !(add_links_mask & BIT(key->conf.link_id)))
+ continue;
+
+ /* shouldn't happen for per-link keys */
+ WARN_ON(key->sta);
+
+ ret = ieee80211_key_enable_hw_accel(key);
+ if (ret)
+ return ret;
+ }
+
+ return 0;
+}
void ieee80211_free_sta_keys(struct ieee80211_local *local,
struct sta_info *sta);
void ieee80211_reenable_keys(struct ieee80211_sub_if_data *sdata);
+int ieee80211_key_switch_links(struct ieee80211_sub_if_data *sdata,
+ unsigned long del_links_mask,
+ unsigned long add_links_mask);
#define key_mtx_dereference(local, ref) \
rcu_dereference_protected(ref, lockdep_is_held(&((local)->key_mtx)))
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "driver-ops.h"
+#include "key.h"
void ieee80211_link_setup(struct ieee80211_link_data *link)
{
ieee80211_free_links(sdata, links);
}
+
+static int _ieee80211_set_active_links(struct ieee80211_sub_if_data *sdata,
+ u16 active_links)
+{
+ struct ieee80211_bss_conf *link_confs[IEEE80211_MLD_MAX_NUM_LINKS];
+ struct ieee80211_local *local = sdata->local;
+ u16 old_active = sdata->vif.active_links;
+ unsigned long rem = old_active & ~active_links;
+ unsigned long add = active_links & ~old_active;
+ struct sta_info *sta;
+ unsigned int link_id;
+ int ret, i;
+
+ if (!ieee80211_sdata_running(sdata))
+ return -ENETDOWN;
+
+ if (sdata->vif.type != NL80211_IFTYPE_STATION)
+ return -EINVAL;
+
+ /* cannot activate links that don't exist */
+ if (active_links & ~sdata->vif.valid_links)
+ return -EINVAL;
+
+ /* nothing to do */
+ if (old_active == active_links)
+ return 0;
+
+ for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++)
+ link_confs[i] = sdata_dereference(sdata->vif.link_conf[i],
+ sdata);
+
+ if (add) {
+ sdata->vif.active_links |= active_links;
+ ret = drv_change_vif_links(local, sdata,
+ old_active,
+ sdata->vif.active_links,
+ link_confs);
+ if (ret) {
+ sdata->vif.active_links = old_active;
+ return ret;
+ }
+ }
+
+ for_each_set_bit(link_id, &rem, IEEE80211_MLD_MAX_NUM_LINKS) {
+ struct ieee80211_link_data *link;
+
+ link = sdata_dereference(sdata->link[link_id], sdata);
+
+ /* FIXME: kill TDLS connections on the link */
+
+ ieee80211_link_release_channel(link);
+ }
+
+ list_for_each_entry(sta, &local->sta_list, list) {
+ if (sdata != sta->sdata)
+ continue;
+ ret = drv_change_sta_links(local, sdata, &sta->sta,
+ old_active,
+ old_active | active_links);
+ WARN_ON_ONCE(ret);
+ }
+
+ ret = ieee80211_key_switch_links(sdata, rem, add);
+ WARN_ON_ONCE(ret);
+
+ list_for_each_entry(sta, &local->sta_list, list) {
+ if (sdata != sta->sdata)
+ continue;
+ ret = drv_change_sta_links(local, sdata, &sta->sta,
+ old_active | active_links,
+ active_links);
+ WARN_ON_ONCE(ret);
+ }
+
+ for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) {
+ struct ieee80211_link_data *link;
+
+ link = sdata_dereference(sdata->link[link_id], sdata);
+
+ ret = ieee80211_link_use_channel(link, &link->conf->chandef,
+ IEEE80211_CHANCTX_SHARED);
+ WARN_ON_ONCE(ret);
+
+ ieee80211_link_info_change_notify(sdata, link,
+ BSS_CHANGED_ERP_CTS_PROT |
+ BSS_CHANGED_ERP_PREAMBLE |
+ BSS_CHANGED_ERP_SLOT |
+ BSS_CHANGED_HT |
+ BSS_CHANGED_BASIC_RATES |
+ BSS_CHANGED_BSSID |
+ BSS_CHANGED_CQM |
+ BSS_CHANGED_QOS |
+ BSS_CHANGED_TXPOWER |
+ BSS_CHANGED_BANDWIDTH |
+ BSS_CHANGED_TWT |
+ BSS_CHANGED_HE_OBSS_PD |
+ BSS_CHANGED_HE_BSS_COLOR);
+ ieee80211_mgd_set_link_qos_params(link);
+ }
+
+ old_active = sdata->vif.active_links;
+ sdata->vif.active_links = active_links;
+
+ if (rem) {
+ ret = drv_change_vif_links(local, sdata, old_active,
+ active_links, link_confs);
+ WARN_ON_ONCE(ret);
+ }
+
+ return 0;
+}
+
+int ieee80211_set_active_links(struct ieee80211_vif *vif, u16 active_links)
+{
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+ struct ieee80211_local *local = sdata->local;
+ u16 old_active;
+ int ret;
+
+ sdata_lock(sdata);
+ mutex_lock(&local->sta_mtx);
+ mutex_lock(&local->mtx);
+ mutex_lock(&local->key_mtx);
+ old_active = sdata->vif.active_links;
+ if (old_active & active_links) {
+ /*
+ * if there's at least one link that stays active across
+ * the change then switch to it (to those) first, and
+ * then enable the additional links
+ */
+ ret = _ieee80211_set_active_links(sdata,
+ old_active & active_links);
+ if (!ret)
+ ret = _ieee80211_set_active_links(sdata, active_links);
+ } else {
+ /* otherwise switch directly */
+ ret = _ieee80211_set_active_links(sdata, active_links);
+ }
+ mutex_unlock(&local->key_mtx);
+ mutex_unlock(&local->mtx);
+ mutex_unlock(&local->sta_mtx);
+ sdata_unlock(sdata);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(ieee80211_set_active_links);
+
+void ieee80211_set_active_links_async(struct ieee80211_vif *vif,
+ u16 active_links)
+{
+ struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
+
+ if (!ieee80211_sdata_running(sdata))
+ return;
+
+ if (sdata->vif.type != NL80211_IFTYPE_STATION)
+ return;
+
+ /* cannot activate links that don't exist */
+ if (active_links & ~sdata->vif.valid_links)
+ return;
+
+ /* nothing to do */
+ if (sdata->vif.active_links == active_links)
+ return;
+
+ sdata->desired_active_links = active_links;
+ schedule_work(&sdata->activate_links_work);
+}
+EXPORT_SYMBOL_GPL(ieee80211_set_active_links_async);
projects / users / hch / xfs.git / commitdiff