* This structure keeps information about a BSS (and an association
* to that BSS) that can change during the lifetime of the BSS.
*
+ * @addr: (link) address used locally
* @htc_trig_based_pkt_ext: default PE in 4us units, if BSS supports HE
* @uora_exists: is the UORA element advertised by AP
* @ack_enabled: indicates support to receive a multi-TID that solicits either
*/
struct ieee80211_bss_conf {
const u8 *bssid;
+ u8 addr[ETH_ALEN] __aligned(2);
u8 htc_trig_based_pkt_ext;
bool uora_exists;
u8 uora_ocw_range;
* or the BSS we're associated to
* @link_conf: in case of MLD, the per-link BSS configuration,
* indexed by link ID
+ * @valid_links: bitmap of valid links, or 0 for non-MLO.
* @addr: address of this interface
* @p2p: indicates whether this AP or STA interface is a p2p
* interface, i.e. a GO or p2p-sta respectively
struct ieee80211_vif_cfg cfg;
struct ieee80211_bss_conf bss_conf;
struct ieee80211_bss_conf *link_conf[IEEE80211_MLD_MAX_NUM_LINKS];
+ u16 valid_links;
u8 addr[ETH_ALEN] __aligned(2);
bool p2p;
* disable background CAC/radar detection.
* @net_fill_forward_path: Called from .ndo_fill_forward_path in order to
* resolve a path for hardware flow offloading
+ * @change_vif_links: Change the valid links on an interface, note that while
+ * removing the old link information is still valid (link_conf pointer),
+ * but may immediately disappear after the function returns. The old or
+ * new links bitmaps may be 0 if going from/to a non-MLO situation.
+ * The @old[] array contains pointers to the old bss_conf structures
+ * that were already removed, in case they're needed.
+ * This callback can sleep.
*/
struct ieee80211_ops {
void (*tx)(struct ieee80211_hw *hw,
struct ieee80211_sta *sta,
struct net_device_path_ctx *ctx,
struct net_device_path *path);
+ int (*change_vif_links)(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ u16 old_links, u16 new_links,
+ struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS]);
};
/**
ret = eth_mac_addr(dev, sa);
- if (ret == 0)
+ if (ret == 0) {
memcpy(sdata->vif.addr, sa->sa_data, ETH_ALEN);
+ ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
+ }
return ret;
}
cancel_work_sync(&local->dynamic_ps_enable_work);
cancel_work_sync(&sdata->recalc_smps);
+
sdata_lock(sdata);
+ WARN(sdata->vif.valid_links,
+ "destroying interface with valid links 0x%04x\n",
+ sdata->vif.valid_links);
+
mutex_lock(&local->mtx);
sdata->vif.bss_conf.csa_active = false;
if (sdata->vif.type == NL80211_IFTYPE_STATION)
}
static void ieee80211_link_init(struct ieee80211_sub_if_data *sdata,
- unsigned int link_id,
+ int link_id,
struct ieee80211_link_data *link,
struct ieee80211_bss_conf *link_conf)
{
+ bool deflink = link_id < 0;
+
+ if (link_id < 0)
+ link_id = 0;
+
sdata->vif.link_conf[link_id] = link_conf;
sdata->link[link_id] = link;
INIT_LIST_HEAD(&link->reserved_chanctx_list);
INIT_DELAYED_WORK(&link->dfs_cac_timer_work,
ieee80211_dfs_cac_timer_work);
+
+ if (!deflink) {
+ switch (sdata->vif.type) {
+ case NL80211_IFTYPE_AP:
+ ether_addr_copy(link_conf->addr,
+ sdata->wdev.links[link_id].addr);
+ WARN_ON(!(sdata->wdev.valid_links & BIT(link_id)));
+ break;
+ case NL80211_IFTYPE_STATION:
+ eth_random_addr(link_conf->addr);
+ ether_addr_copy(sdata->wdev.links[link_id].addr,
+ link_conf->addr);
+ break;
+ default:
+ WARN_ON(1);
+ }
+ }
}
static void ieee80211_sdata_init(struct ieee80211_local *local,
* Note that we never change this, so if link ID 0 isn't used in an
* MLD connection, we get a separate allocation for it.
*/
- ieee80211_link_init(sdata, 0, &sdata->deflink, &sdata->vif.bss_conf);
+ ieee80211_link_init(sdata, -1, &sdata->deflink, &sdata->vif.bss_conf);
}
int ieee80211_add_virtual_monitor(struct ieee80211_local *local)
if (!local->ops->change_interface)
return -EBUSY;
+ /* for now, don't support changing while links exist */
+ if (sdata->vif.valid_links)
+ return -EBUSY;
+
switch (sdata->vif.type) {
case NL80211_IFTYPE_AP:
if (!list_empty(&sdata->u.ap.vlans))
strlcpy(sdata->name, name, IFNAMSIZ);
ieee80211_assign_perm_addr(local, wdev->address, type);
memcpy(sdata->vif.addr, wdev->address, ETH_ALEN);
+ ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
} else {
int size = ALIGN(sizeof(*sdata) + local->hw.vif_data_size,
sizeof(void *));
sdata = netdev_priv(ndev);
ndev->ieee80211_ptr = &sdata->wdev;
memcpy(sdata->vif.addr, ndev->dev_addr, ETH_ALEN);
+ ether_addr_copy(sdata->vif.bss_conf.addr, sdata->vif.addr);
memcpy(sdata->name, ndev->name, IFNAMSIZ);
if (txq_size) {
else if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
atomic_dec(&sdata->u.vlan.num_mcast_sta);
}
+
+int ieee80211_vif_set_links(struct ieee80211_sub_if_data *sdata,
+ u16 new_links)
+{
+ u16 old_links = sdata->vif.valid_links;
+ unsigned long add = new_links & ~old_links;
+ unsigned long rem = old_links & ~new_links;
+ unsigned int link_id;
+ int ret;
+ struct {
+ struct ieee80211_link_data data;
+ struct ieee80211_bss_conf conf;
+ } *links[IEEE80211_MLD_MAX_NUM_LINKS] = {}, *link;
+ struct ieee80211_bss_conf *old[IEEE80211_MLD_MAX_NUM_LINKS];
+ struct ieee80211_link_data *old_data[IEEE80211_MLD_MAX_NUM_LINKS];
+ bool use_deflink = old_links == 0; /* set for error case */
+
+ sdata_assert_lock(sdata);
+
+ if (old_links == new_links)
+ return 0;
+
+ /* allocate new link structures first */
+ for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) {
+ link = kzalloc(sizeof(*link), GFP_KERNEL);
+ if (!link) {
+ ret = -ENOMEM;
+ goto free;
+ }
+ links[link_id] = link;
+ }
+
+ /* keep track of the old pointers for the driver */
+ BUILD_BUG_ON(sizeof(old) != sizeof(sdata->vif.link_conf));
+ memcpy(old, sdata->vif.link_conf, sizeof(old));
+ /* and for us in error cases */
+ BUILD_BUG_ON(sizeof(old_data) != sizeof(sdata->link));
+ memcpy(old_data, sdata->link, sizeof(old_data));
+
+ /* link them into data structures */
+ for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) {
+ WARN_ON(!use_deflink &&
+ sdata->link[link_id] == &sdata->deflink);
+
+ link = links[link_id];
+ ieee80211_link_init(sdata, link_id, &link->data, &link->conf);
+ }
+
+ for_each_set_bit(link_id, &rem, IEEE80211_MLD_MAX_NUM_LINKS) {
+ sdata->link[link_id] = NULL;
+ sdata->vif.link_conf[link_id] = NULL;
+ }
+
+ sdata->vif.valid_links = new_links;
+
+ /* tell the driver */
+ ret = drv_change_vif_links(sdata->local, sdata,
+ old_links, new_links,
+ old);
+ if (ret) {
+ /* restore config */
+ memcpy(sdata->link, old_data, sizeof(old_data));
+ memcpy(sdata->vif.link_conf, old, sizeof(old));
+ sdata->vif.valid_links = old_links;
+ /* and free the newly allocated links */
+ goto free;
+ }
+
+ /* use deflink/bss_conf again if and only if there are no more links */
+ use_deflink = new_links == 0;
+
+ /* now use this to free the old links */
+ memset(links, 0, sizeof(links));
+ for_each_set_bit(link_id, &rem, IEEE80211_MLD_MAX_NUM_LINKS) {
+ if (sdata->link[link_id] == &sdata->deflink)
+ continue;
+ /*
+ * we must have allocated the data through this path so
+ * we know we can free both at the same time
+ */
+ links[link_id] = container_of(sdata->link[link_id],
+ typeof(*links[link_id]),
+ data);
+ }
+
+free:
+ for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++)
+ kfree(links[link_id]);
+ if (use_deflink)
+ ieee80211_link_init(sdata, -1, &sdata->deflink,
+ &sdata->vif.bss_conf);
+ return ret;
+}