wifi: mac80211: move link code to a new file

We probably should've done that originally, we already have
about 300 lines of code there, and will add more. Move all
the link code we wrote to a new file.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>

1 files changed, 0 insertions, 251 deletions

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 48d6adec197d..f99685e2d633 100644
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -439,257 +439,6 @@ static int ieee80211_open(struct net_device *dev)
 	return err;
 }
 
-static void ieee80211_link_setup(struct ieee80211_link_data *link)
-{
-	if (link->sdata->vif.type == NL80211_IFTYPE_STATION)
-		ieee80211_mgd_setup_link(link);
-}
-
-static void ieee80211_link_init(struct ieee80211_sub_if_data *sdata,
-				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;
-
-	rcu_assign_pointer(sdata->vif.link_conf[link_id], link_conf);
-	rcu_assign_pointer(sdata->link[link_id], link);
-
-	link->sdata = sdata;
-	link->link_id = link_id;
-	link->conf = link_conf;
-	link_conf->link_id = link_id;
-
-	INIT_WORK(&link->csa_finalize_work,
-		  ieee80211_csa_finalize_work);
-	INIT_WORK(&link->color_change_finalize_work,
-		  ieee80211_color_change_finalize_work);
-	INIT_LIST_HEAD(&link->assigned_chanctx_list);
-	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);
-			link_conf->bssid = link_conf->addr;
-			WARN_ON(!(sdata->wdev.valid_links & BIT(link_id)));
-			break;
-		case NL80211_IFTYPE_STATION:
-			/* station sets the bssid in ieee80211_mgd_setup_link */
-			break;
-		default:
-			WARN_ON(1);
-		}
-	}
-}
-
-static void ieee80211_link_stop(struct ieee80211_link_data *link)
-{
-	if (link->sdata->vif.type == NL80211_IFTYPE_STATION)
-		ieee80211_mgd_stop_link(link);
-
-	ieee80211_link_release_channel(link);
-}
-
-struct link_container {
-	struct ieee80211_link_data data;
-	struct ieee80211_bss_conf conf;
-};
-
-static void ieee80211_free_links(struct ieee80211_sub_if_data *sdata,
-				 struct link_container **links)
-{
-	LIST_HEAD(keys);
-	unsigned int link_id;
-
-	for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
-		if (!links[link_id])
-			continue;
-		ieee80211_remove_link_keys(&links[link_id]->data, &keys);
-	}
-
-	synchronize_rcu();
-
-	ieee80211_free_key_list(sdata->local, &keys);
-
-	for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
-		if (!links[link_id])
-			continue;
-		ieee80211_link_stop(&links[link_id]->data);
-		kfree(links[link_id]);
-	}
-}
-
-static int ieee80211_check_dup_link_addrs(struct ieee80211_sub_if_data *sdata)
-{
-	unsigned int i, j;
-
-	for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) {
-		struct ieee80211_link_data *link1;
-
-		link1 = sdata_dereference(sdata->link[i], sdata);
-		if (!link1)
-			continue;
-		for (j = i + 1; j < IEEE80211_MLD_MAX_NUM_LINKS; j++) {
-			struct ieee80211_link_data *link2;
-
-			link2 = sdata_dereference(sdata->link[j], sdata);
-			if (!link2)
-				continue;
-
-			if (ether_addr_equal(link1->conf->addr,
-					     link2->conf->addr))
-				return -EALREADY;
-		}
-	}
-
-	return 0;
-}
-
-static int ieee80211_vif_update_links(struct ieee80211_sub_if_data *sdata,
-				      struct link_container **to_free,
-				      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 link_container *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);
-
-	memset(to_free, 0, sizeof(links));
-
-	if (old_links == new_links)
-		return 0;
-
-	/* if there were no old links, need to clear the pointers to deflink */
-	if (!old_links)
-		rem |= BIT(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));
-
-	/* grab old links to free later */
-	for_each_set_bit(link_id, &rem, IEEE80211_MLD_MAX_NUM_LINKS) {
-		if (rcu_access_pointer(sdata->link[link_id]) != &sdata->deflink) {
-			/*
-			 * we must have allocated the data through this path so
-			 * we know we can free both at the same time
-			 */
-			to_free[link_id] = container_of(rcu_access_pointer(sdata->link[link_id]),
-							typeof(*links[link_id]),
-							data);
-		}
-
-		RCU_INIT_POINTER(sdata->link[link_id], NULL);
-		RCU_INIT_POINTER(sdata->vif.link_conf[link_id], NULL);
-	}
-
-	/* link them into data structures */
-	for_each_set_bit(link_id, &add, IEEE80211_MLD_MAX_NUM_LINKS) {
-		WARN_ON(!use_deflink &&
-			rcu_access_pointer(sdata->link[link_id]) == &sdata->deflink);
-
-		link = links[link_id];
-		ieee80211_link_init(sdata, link_id, &link->data, &link->conf);
-		ieee80211_link_setup(&link->data);
-	}
-
-	if (new_links == 0)
-		ieee80211_link_init(sdata, -1, &sdata->deflink,
-				    &sdata->vif.bss_conf);
-
-	sdata->vif.valid_links = new_links;
-
-	ret = ieee80211_check_dup_link_addrs(sdata);
-	if (!ret) {
-		/* 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 (only) the newly allocated links */
-		memset(to_free, 0, sizeof(links));
-		goto free;
-	}
-
-	/* use deflink/bss_conf again if and only if there are no more links */
-	use_deflink = new_links == 0;
-
-	goto deinit;
-free:
-	/* if we failed during allocation, only free all */
-	for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) {
-		kfree(links[link_id]);
-		links[link_id] = NULL;
-	}
-deinit:
-	if (use_deflink)
-		ieee80211_link_init(sdata, -1, &sdata->deflink,
-				    &sdata->vif.bss_conf);
-	return ret;
-}
-
-int ieee80211_vif_set_links(struct ieee80211_sub_if_data *sdata,
-			    u16 new_links)
-{
-	struct link_container *links[IEEE80211_MLD_MAX_NUM_LINKS];
-	int ret;
-
-	ret = ieee80211_vif_update_links(sdata, links, new_links);
-	ieee80211_free_links(sdata, links);
-
-	return ret;
-}
-
-static void ieee80211_vif_clear_links(struct ieee80211_sub_if_data *sdata)
-{
-	struct link_container *links[IEEE80211_MLD_MAX_NUM_LINKS];
-
-	/*
-	 * The locking here is different because when we free links
-	 * in the station case we need to be able to cancel_work_sync()
-	 * something that also takes the lock.
-	 */
-
-	sdata_lock(sdata);
-	ieee80211_vif_update_links(sdata, links, 0);
-	sdata_unlock(sdata);
-
-	ieee80211_free_links(sdata, links);
-}
-
 static void ieee80211_do_stop(struct ieee80211_sub_if_data *sdata, bool going_down)
 {
 	struct ieee80211_local *local = sdata->local;