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c71420db65
We need to be able to access these in a race-free way under traffic while adding/removing them, so RCU-ify the pointers. This requires passing a link_sta to a lot of functions so we don't have to do the RCU handling everywhere. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2035 lines
52 KiB
C
2035 lines
52 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* mac80211 - channel management
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* Copyright 2020 - 2022 Intel Corporation
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*/
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#include <linux/nl80211.h>
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#include <linux/export.h>
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#include <linux/rtnetlink.h>
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#include <net/cfg80211.h>
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#include "ieee80211_i.h"
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#include "driver-ops.h"
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#include "rate.h"
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static int ieee80211_chanctx_num_assigned(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx)
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{
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struct ieee80211_link_data *link;
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int num = 0;
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lockdep_assert_held(&local->chanctx_mtx);
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list_for_each_entry(link, &ctx->assigned_links, assigned_chanctx_list)
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num++;
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return num;
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}
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static int ieee80211_chanctx_num_reserved(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx)
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{
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struct ieee80211_link_data *link;
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int num = 0;
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lockdep_assert_held(&local->chanctx_mtx);
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list_for_each_entry(link, &ctx->reserved_links, reserved_chanctx_list)
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num++;
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return num;
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}
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int ieee80211_chanctx_refcount(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx)
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{
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return ieee80211_chanctx_num_assigned(local, ctx) +
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ieee80211_chanctx_num_reserved(local, ctx);
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}
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static int ieee80211_num_chanctx(struct ieee80211_local *local)
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{
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struct ieee80211_chanctx *ctx;
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int num = 0;
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lockdep_assert_held(&local->chanctx_mtx);
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list_for_each_entry(ctx, &local->chanctx_list, list)
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num++;
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return num;
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}
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static bool ieee80211_can_create_new_chanctx(struct ieee80211_local *local)
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{
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lockdep_assert_held(&local->chanctx_mtx);
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return ieee80211_num_chanctx(local) < ieee80211_max_num_channels(local);
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}
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static struct ieee80211_chanctx *
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ieee80211_vif_get_chanctx(struct ieee80211_sub_if_data *sdata,
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unsigned int link_id)
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{
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struct ieee80211_bss_conf *link_conf = sdata->vif.link_conf[link_id];
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struct ieee80211_local *local __maybe_unused = sdata->local;
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struct ieee80211_chanctx_conf *conf;
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conf = rcu_dereference_protected(link_conf->chanctx_conf,
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lockdep_is_held(&local->chanctx_mtx));
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if (!conf)
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return NULL;
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return container_of(conf, struct ieee80211_chanctx, conf);
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}
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static struct ieee80211_chanctx *
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ieee80211_link_get_chanctx(struct ieee80211_link_data *link)
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{
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return ieee80211_vif_get_chanctx(link->sdata, link->link_id);
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}
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static const struct cfg80211_chan_def *
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ieee80211_chanctx_reserved_chandef(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx,
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const struct cfg80211_chan_def *compat)
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{
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struct ieee80211_link_data *link;
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lockdep_assert_held(&local->chanctx_mtx);
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list_for_each_entry(link, &ctx->reserved_links,
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reserved_chanctx_list) {
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if (!compat)
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compat = &link->reserved_chandef;
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compat = cfg80211_chandef_compatible(&link->reserved_chandef,
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compat);
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if (!compat)
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break;
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}
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return compat;
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}
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static const struct cfg80211_chan_def *
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ieee80211_chanctx_non_reserved_chandef(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx,
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const struct cfg80211_chan_def *compat)
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{
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struct ieee80211_link_data *link;
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lockdep_assert_held(&local->chanctx_mtx);
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list_for_each_entry(link, &ctx->assigned_links,
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assigned_chanctx_list) {
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struct ieee80211_bss_conf *link_conf =
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link->sdata->vif.link_conf[link->link_id];
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if (link->reserved_chanctx)
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continue;
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if (!compat)
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compat = &link_conf->chandef;
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compat = cfg80211_chandef_compatible(
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&link_conf->chandef, compat);
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if (!compat)
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break;
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}
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return compat;
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}
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static const struct cfg80211_chan_def *
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ieee80211_chanctx_combined_chandef(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx,
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const struct cfg80211_chan_def *compat)
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{
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lockdep_assert_held(&local->chanctx_mtx);
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compat = ieee80211_chanctx_reserved_chandef(local, ctx, compat);
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if (!compat)
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return NULL;
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compat = ieee80211_chanctx_non_reserved_chandef(local, ctx, compat);
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if (!compat)
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return NULL;
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return compat;
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}
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static bool
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ieee80211_chanctx_can_reserve_chandef(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx,
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const struct cfg80211_chan_def *def)
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{
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lockdep_assert_held(&local->chanctx_mtx);
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if (ieee80211_chanctx_combined_chandef(local, ctx, def))
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return true;
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if (!list_empty(&ctx->reserved_links) &&
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ieee80211_chanctx_reserved_chandef(local, ctx, def))
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return true;
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return false;
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}
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static struct ieee80211_chanctx *
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ieee80211_find_reservation_chanctx(struct ieee80211_local *local,
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const struct cfg80211_chan_def *chandef,
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enum ieee80211_chanctx_mode mode)
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{
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struct ieee80211_chanctx *ctx;
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lockdep_assert_held(&local->chanctx_mtx);
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if (mode == IEEE80211_CHANCTX_EXCLUSIVE)
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return NULL;
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list_for_each_entry(ctx, &local->chanctx_list, list) {
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if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
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continue;
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if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE)
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continue;
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if (!ieee80211_chanctx_can_reserve_chandef(local, ctx,
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chandef))
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continue;
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return ctx;
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}
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return NULL;
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}
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static enum nl80211_chan_width ieee80211_get_sta_bw(struct sta_info *sta,
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unsigned int link_id)
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{
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enum ieee80211_sta_rx_bandwidth width;
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struct link_sta_info *link_sta;
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link_sta = rcu_dereference(sta->link[link_id]);
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/* no effect if this STA has no presence on this link */
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if (!link_sta)
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return NL80211_CHAN_WIDTH_20_NOHT;
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width = ieee80211_sta_cap_rx_bw(link_sta);
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switch (width) {
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case IEEE80211_STA_RX_BW_20:
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if (link_sta->pub->ht_cap.ht_supported)
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return NL80211_CHAN_WIDTH_20;
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else
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return NL80211_CHAN_WIDTH_20_NOHT;
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case IEEE80211_STA_RX_BW_40:
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return NL80211_CHAN_WIDTH_40;
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case IEEE80211_STA_RX_BW_80:
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return NL80211_CHAN_WIDTH_80;
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case IEEE80211_STA_RX_BW_160:
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/*
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* This applied for both 160 and 80+80. since we use
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* the returned value to consider degradation of
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* ctx->conf.min_def, we have to make sure to take
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* the bigger one (NL80211_CHAN_WIDTH_160).
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* Otherwise we might try degrading even when not
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* needed, as the max required sta_bw returned (80+80)
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* might be smaller than the configured bw (160).
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*/
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return NL80211_CHAN_WIDTH_160;
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case IEEE80211_STA_RX_BW_320:
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return NL80211_CHAN_WIDTH_320;
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default:
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WARN_ON(1);
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return NL80211_CHAN_WIDTH_20;
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}
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}
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static enum nl80211_chan_width
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ieee80211_get_max_required_bw(struct ieee80211_sub_if_data *sdata,
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unsigned int link_id)
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{
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enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT;
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struct sta_info *sta;
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rcu_read_lock();
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list_for_each_entry_rcu(sta, &sdata->local->sta_list, list) {
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if (sdata != sta->sdata &&
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!(sta->sdata->bss && sta->sdata->bss == sdata->bss))
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continue;
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max_bw = max(max_bw, ieee80211_get_sta_bw(sta, link_id));
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}
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rcu_read_unlock();
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return max_bw;
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}
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static enum nl80211_chan_width
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ieee80211_get_chanctx_vif_max_required_bw(struct ieee80211_sub_if_data *sdata,
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struct ieee80211_chanctx_conf *conf)
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{
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enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT;
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struct ieee80211_vif *vif = &sdata->vif;
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int link_id;
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for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
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enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20_NOHT;
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struct ieee80211_bss_conf *link_conf =
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sdata->vif.link_conf[link_id];
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if (!link_conf)
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continue;
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if (rcu_access_pointer(link_conf->chanctx_conf) != conf)
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continue;
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switch (vif->type) {
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case NL80211_IFTYPE_AP:
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case NL80211_IFTYPE_AP_VLAN:
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width = ieee80211_get_max_required_bw(sdata, link_id);
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break;
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case NL80211_IFTYPE_STATION:
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/*
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* The ap's sta->bandwidth is not set yet at this
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* point, so take the width from the chandef, but
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* account also for TDLS peers
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*/
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width = max(link_conf->chandef.width,
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ieee80211_get_max_required_bw(sdata, link_id));
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break;
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case NL80211_IFTYPE_P2P_DEVICE:
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case NL80211_IFTYPE_NAN:
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continue;
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case NL80211_IFTYPE_ADHOC:
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case NL80211_IFTYPE_MESH_POINT:
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case NL80211_IFTYPE_OCB:
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width = link_conf->chandef.width;
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break;
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case NL80211_IFTYPE_WDS:
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case NL80211_IFTYPE_UNSPECIFIED:
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case NUM_NL80211_IFTYPES:
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case NL80211_IFTYPE_MONITOR:
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case NL80211_IFTYPE_P2P_CLIENT:
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case NL80211_IFTYPE_P2P_GO:
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WARN_ON_ONCE(1);
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}
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max_bw = max(max_bw, width);
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}
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return max_bw;
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}
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static enum nl80211_chan_width
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ieee80211_get_chanctx_max_required_bw(struct ieee80211_local *local,
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struct ieee80211_chanctx_conf *conf)
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{
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struct ieee80211_sub_if_data *sdata;
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enum nl80211_chan_width max_bw = NL80211_CHAN_WIDTH_20_NOHT;
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rcu_read_lock();
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list_for_each_entry_rcu(sdata, &local->interfaces, list) {
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enum nl80211_chan_width width;
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if (!ieee80211_sdata_running(sdata))
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continue;
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width = ieee80211_get_chanctx_vif_max_required_bw(sdata, conf);
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max_bw = max(max_bw, width);
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}
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/* use the configured bandwidth in case of monitor interface */
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sdata = rcu_dereference(local->monitor_sdata);
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if (sdata &&
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rcu_access_pointer(sdata->vif.link_conf[0]->chanctx_conf) == conf)
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max_bw = max(max_bw, conf->def.width);
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rcu_read_unlock();
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return max_bw;
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}
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/*
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* recalc the min required chan width of the channel context, which is
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* the max of min required widths of all the interfaces bound to this
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* channel context.
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*/
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static u32 _ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx)
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{
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enum nl80211_chan_width max_bw;
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struct cfg80211_chan_def min_def;
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lockdep_assert_held(&local->chanctx_mtx);
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/* don't optimize non-20MHz based and radar_enabled confs */
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if (ctx->conf.def.width == NL80211_CHAN_WIDTH_5 ||
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ctx->conf.def.width == NL80211_CHAN_WIDTH_10 ||
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ctx->conf.def.width == NL80211_CHAN_WIDTH_1 ||
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ctx->conf.def.width == NL80211_CHAN_WIDTH_2 ||
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ctx->conf.def.width == NL80211_CHAN_WIDTH_4 ||
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ctx->conf.def.width == NL80211_CHAN_WIDTH_8 ||
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ctx->conf.def.width == NL80211_CHAN_WIDTH_16 ||
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ctx->conf.radar_enabled) {
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ctx->conf.min_def = ctx->conf.def;
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return 0;
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}
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max_bw = ieee80211_get_chanctx_max_required_bw(local, &ctx->conf);
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/* downgrade chandef up to max_bw */
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min_def = ctx->conf.def;
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while (min_def.width > max_bw)
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ieee80211_chandef_downgrade(&min_def);
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if (cfg80211_chandef_identical(&ctx->conf.min_def, &min_def))
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return 0;
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ctx->conf.min_def = min_def;
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if (!ctx->driver_present)
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return 0;
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return IEEE80211_CHANCTX_CHANGE_MIN_WIDTH;
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}
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/* calling this function is assuming that station vif is updated to
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* lates changes by calling ieee80211_link_update_chandef
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*/
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static void ieee80211_chan_bw_change(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx,
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bool narrowed)
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{
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struct sta_info *sta;
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struct ieee80211_supported_band *sband =
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local->hw.wiphy->bands[ctx->conf.def.chan->band];
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rcu_read_lock();
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list_for_each_entry_rcu(sta, &local->sta_list,
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list) {
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struct ieee80211_sub_if_data *sdata = sta->sdata;
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enum ieee80211_sta_rx_bandwidth new_sta_bw;
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unsigned int link_id;
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if (!ieee80211_sdata_running(sta->sdata))
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continue;
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for (link_id = 0; link_id < ARRAY_SIZE(sta->sdata->link); link_id++) {
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struct ieee80211_bss_conf *link_conf =
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sdata->vif.link_conf[link_id];
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struct link_sta_info *link_sta;
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if (!link_conf)
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continue;
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if (rcu_access_pointer(link_conf->chanctx_conf) != &ctx->conf)
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continue;
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link_sta = rcu_dereference(sta->link[link_id]);
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if (!link_sta)
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continue;
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new_sta_bw = ieee80211_sta_cur_vht_bw(link_sta);
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/* nothing change */
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if (new_sta_bw == link_sta->pub->bandwidth)
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continue;
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/* vif changed to narrow BW and narrow BW for station wasn't
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* requested or vise versa */
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if ((new_sta_bw < link_sta->pub->bandwidth) == !narrowed)
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continue;
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link_sta->pub->bandwidth = new_sta_bw;
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rate_control_rate_update(local, sband, sta, link_id,
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IEEE80211_RC_BW_CHANGED);
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}
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}
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rcu_read_unlock();
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}
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/*
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* recalc the min required chan width of the channel context, which is
|
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* the max of min required widths of all the interfaces bound to this
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* channel context.
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*/
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void ieee80211_recalc_chanctx_min_def(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx)
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{
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u32 changed = _ieee80211_recalc_chanctx_min_def(local, ctx);
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if (!changed)
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return;
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/* check is BW narrowed */
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ieee80211_chan_bw_change(local, ctx, true);
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drv_change_chanctx(local, ctx, changed);
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/* check is BW wider */
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ieee80211_chan_bw_change(local, ctx, false);
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}
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static void ieee80211_change_chanctx(struct ieee80211_local *local,
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struct ieee80211_chanctx *ctx,
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struct ieee80211_chanctx *old_ctx,
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const struct cfg80211_chan_def *chandef)
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{
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u32 changed;
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/* expected to handle only 20/40/80/160/320 channel widths */
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switch (chandef->width) {
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case NL80211_CHAN_WIDTH_20_NOHT:
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case NL80211_CHAN_WIDTH_20:
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case NL80211_CHAN_WIDTH_40:
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case NL80211_CHAN_WIDTH_80:
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case NL80211_CHAN_WIDTH_80P80:
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case NL80211_CHAN_WIDTH_160:
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case NL80211_CHAN_WIDTH_320:
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break;
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default:
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WARN_ON(1);
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}
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|
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/* Check maybe BW narrowed - we do this _before_ calling recalc_chanctx_min_def
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* due to maybe not returning from it, e.g in case new context was added
|
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* first time with all parameters up to date.
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*/
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ieee80211_chan_bw_change(local, old_ctx, true);
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|
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if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) {
|
|
ieee80211_recalc_chanctx_min_def(local, ctx);
|
|
return;
|
|
}
|
|
|
|
WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef));
|
|
|
|
ctx->conf.def = *chandef;
|
|
|
|
/* check if min chanctx also changed */
|
|
changed = IEEE80211_CHANCTX_CHANGE_WIDTH |
|
|
_ieee80211_recalc_chanctx_min_def(local, ctx);
|
|
drv_change_chanctx(local, ctx, changed);
|
|
|
|
if (!local->use_chanctx) {
|
|
local->_oper_chandef = *chandef;
|
|
ieee80211_hw_config(local, 0);
|
|
}
|
|
|
|
/* check is BW wider */
|
|
ieee80211_chan_bw_change(local, old_ctx, false);
|
|
}
|
|
|
|
static struct ieee80211_chanctx *
|
|
ieee80211_find_chanctx(struct ieee80211_local *local,
|
|
const struct cfg80211_chan_def *chandef,
|
|
enum ieee80211_chanctx_mode mode)
|
|
{
|
|
struct ieee80211_chanctx *ctx;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
if (mode == IEEE80211_CHANCTX_EXCLUSIVE)
|
|
return NULL;
|
|
|
|
list_for_each_entry(ctx, &local->chanctx_list, list) {
|
|
const struct cfg80211_chan_def *compat;
|
|
|
|
if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE)
|
|
continue;
|
|
|
|
if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE)
|
|
continue;
|
|
|
|
compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef);
|
|
if (!compat)
|
|
continue;
|
|
|
|
compat = ieee80211_chanctx_reserved_chandef(local, ctx,
|
|
compat);
|
|
if (!compat)
|
|
continue;
|
|
|
|
ieee80211_change_chanctx(local, ctx, ctx, compat);
|
|
|
|
return ctx;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
bool ieee80211_is_radar_required(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
unsigned int link_id;
|
|
|
|
for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
|
|
if (sdata->link[link_id] &&
|
|
sdata->link[link_id]->radar_required) {
|
|
rcu_read_unlock();
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return false;
|
|
}
|
|
|
|
static bool
|
|
ieee80211_chanctx_radar_required(struct ieee80211_local *local,
|
|
struct ieee80211_chanctx *ctx)
|
|
{
|
|
struct ieee80211_chanctx_conf *conf = &ctx->conf;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
bool required = false;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
lockdep_assert_held(&local->mtx);
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
unsigned int link_id;
|
|
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
|
|
struct ieee80211_bss_conf *link_conf =
|
|
sdata->vif.link_conf[link_id];
|
|
|
|
if (!link_conf)
|
|
continue;
|
|
|
|
if (rcu_access_pointer(link_conf->chanctx_conf) != conf)
|
|
continue;
|
|
if (!sdata->link[link_id]->radar_required)
|
|
continue;
|
|
required = true;
|
|
break;
|
|
}
|
|
|
|
if (required)
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return required;
|
|
}
|
|
|
|
static struct ieee80211_chanctx *
|
|
ieee80211_alloc_chanctx(struct ieee80211_local *local,
|
|
const struct cfg80211_chan_def *chandef,
|
|
enum ieee80211_chanctx_mode mode)
|
|
{
|
|
struct ieee80211_chanctx *ctx;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
ctx = kzalloc(sizeof(*ctx) + local->hw.chanctx_data_size, GFP_KERNEL);
|
|
if (!ctx)
|
|
return NULL;
|
|
|
|
INIT_LIST_HEAD(&ctx->assigned_links);
|
|
INIT_LIST_HEAD(&ctx->reserved_links);
|
|
ctx->conf.def = *chandef;
|
|
ctx->conf.rx_chains_static = 1;
|
|
ctx->conf.rx_chains_dynamic = 1;
|
|
ctx->mode = mode;
|
|
ctx->conf.radar_enabled = false;
|
|
ieee80211_recalc_chanctx_min_def(local, ctx);
|
|
|
|
return ctx;
|
|
}
|
|
|
|
static int ieee80211_add_chanctx(struct ieee80211_local *local,
|
|
struct ieee80211_chanctx *ctx)
|
|
{
|
|
u32 changed;
|
|
int err;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
if (!local->use_chanctx)
|
|
local->hw.conf.radar_enabled = ctx->conf.radar_enabled;
|
|
|
|
/* turn idle off *before* setting channel -- some drivers need that */
|
|
changed = ieee80211_idle_off(local);
|
|
if (changed)
|
|
ieee80211_hw_config(local, changed);
|
|
|
|
if (!local->use_chanctx) {
|
|
local->_oper_chandef = ctx->conf.def;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
|
|
} else {
|
|
err = drv_add_chanctx(local, ctx);
|
|
if (err) {
|
|
ieee80211_recalc_idle(local);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct ieee80211_chanctx *
|
|
ieee80211_new_chanctx(struct ieee80211_local *local,
|
|
const struct cfg80211_chan_def *chandef,
|
|
enum ieee80211_chanctx_mode mode)
|
|
{
|
|
struct ieee80211_chanctx *ctx;
|
|
int err;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
ctx = ieee80211_alloc_chanctx(local, chandef, mode);
|
|
if (!ctx)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
err = ieee80211_add_chanctx(local, ctx);
|
|
if (err) {
|
|
kfree(ctx);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
list_add_rcu(&ctx->list, &local->chanctx_list);
|
|
return ctx;
|
|
}
|
|
|
|
static void ieee80211_del_chanctx(struct ieee80211_local *local,
|
|
struct ieee80211_chanctx *ctx)
|
|
{
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
if (!local->use_chanctx) {
|
|
struct cfg80211_chan_def *chandef = &local->_oper_chandef;
|
|
/* S1G doesn't have 20MHz, so get the correct width for the
|
|
* current channel.
|
|
*/
|
|
if (chandef->chan->band == NL80211_BAND_S1GHZ)
|
|
chandef->width =
|
|
ieee80211_s1g_channel_width(chandef->chan);
|
|
else
|
|
chandef->width = NL80211_CHAN_WIDTH_20_NOHT;
|
|
chandef->center_freq1 = chandef->chan->center_freq;
|
|
chandef->freq1_offset = chandef->chan->freq_offset;
|
|
chandef->center_freq2 = 0;
|
|
|
|
/* NOTE: Disabling radar is only valid here for
|
|
* single channel context. To be sure, check it ...
|
|
*/
|
|
WARN_ON(local->hw.conf.radar_enabled &&
|
|
!list_empty(&local->chanctx_list));
|
|
|
|
local->hw.conf.radar_enabled = false;
|
|
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
|
|
} else {
|
|
drv_remove_chanctx(local, ctx);
|
|
}
|
|
|
|
ieee80211_recalc_idle(local);
|
|
}
|
|
|
|
static void ieee80211_free_chanctx(struct ieee80211_local *local,
|
|
struct ieee80211_chanctx *ctx)
|
|
{
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
WARN_ON_ONCE(ieee80211_chanctx_refcount(local, ctx) != 0);
|
|
|
|
list_del_rcu(&ctx->list);
|
|
ieee80211_del_chanctx(local, ctx);
|
|
kfree_rcu(ctx, rcu_head);
|
|
}
|
|
|
|
void ieee80211_recalc_chanctx_chantype(struct ieee80211_local *local,
|
|
struct ieee80211_chanctx *ctx)
|
|
{
|
|
struct ieee80211_chanctx_conf *conf = &ctx->conf;
|
|
struct ieee80211_sub_if_data *sdata;
|
|
const struct cfg80211_chan_def *compat = NULL;
|
|
struct sta_info *sta;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
int link_id;
|
|
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
|
|
continue;
|
|
|
|
for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
|
|
struct ieee80211_bss_conf *link_conf =
|
|
sdata->vif.link_conf[link_id];
|
|
|
|
if (!link_conf)
|
|
continue;
|
|
|
|
if (rcu_access_pointer(link_conf->chanctx_conf) != conf)
|
|
continue;
|
|
|
|
if (!compat)
|
|
compat = &link_conf->chandef;
|
|
|
|
compat = cfg80211_chandef_compatible(&link_conf->chandef,
|
|
compat);
|
|
if (WARN_ON_ONCE(!compat))
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* TDLS peers can sometimes affect the chandef width */
|
|
list_for_each_entry_rcu(sta, &local->sta_list, list) {
|
|
if (!sta->uploaded ||
|
|
!test_sta_flag(sta, WLAN_STA_TDLS_WIDER_BW) ||
|
|
!test_sta_flag(sta, WLAN_STA_AUTHORIZED) ||
|
|
!sta->tdls_chandef.chan)
|
|
continue;
|
|
|
|
compat = cfg80211_chandef_compatible(&sta->tdls_chandef,
|
|
compat);
|
|
if (WARN_ON_ONCE(!compat))
|
|
break;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
if (!compat)
|
|
return;
|
|
|
|
ieee80211_change_chanctx(local, ctx, ctx, compat);
|
|
}
|
|
|
|
static void ieee80211_recalc_radar_chanctx(struct ieee80211_local *local,
|
|
struct ieee80211_chanctx *chanctx)
|
|
{
|
|
bool radar_enabled;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
/* for ieee80211_is_radar_required */
|
|
lockdep_assert_held(&local->mtx);
|
|
|
|
radar_enabled = ieee80211_chanctx_radar_required(local, chanctx);
|
|
|
|
if (radar_enabled == chanctx->conf.radar_enabled)
|
|
return;
|
|
|
|
chanctx->conf.radar_enabled = radar_enabled;
|
|
|
|
if (!local->use_chanctx) {
|
|
local->hw.conf.radar_enabled = chanctx->conf.radar_enabled;
|
|
ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_CHANNEL);
|
|
}
|
|
|
|
drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RADAR);
|
|
}
|
|
|
|
static int ieee80211_assign_link_chanctx(struct ieee80211_link_data *link,
|
|
struct ieee80211_chanctx *new_ctx)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
unsigned int link_id = link->link_id;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx_conf *conf;
|
|
struct ieee80211_chanctx *curr_ctx = NULL;
|
|
int ret = 0;
|
|
|
|
if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_NAN))
|
|
return -ENOTSUPP;
|
|
|
|
conf = rcu_dereference_protected(sdata->vif.link_conf[link_id]->chanctx_conf,
|
|
lockdep_is_held(&local->chanctx_mtx));
|
|
|
|
if (conf) {
|
|
curr_ctx = container_of(conf, struct ieee80211_chanctx, conf);
|
|
|
|
drv_unassign_vif_chanctx(local, sdata, link_id, curr_ctx);
|
|
conf = NULL;
|
|
list_del(&link->assigned_chanctx_list);
|
|
}
|
|
|
|
if (new_ctx) {
|
|
ret = drv_assign_vif_chanctx(local, sdata, link_id, new_ctx);
|
|
if (ret)
|
|
goto out;
|
|
|
|
conf = &new_ctx->conf;
|
|
list_add(&link->assigned_chanctx_list,
|
|
&new_ctx->assigned_links);
|
|
}
|
|
|
|
out:
|
|
rcu_assign_pointer(sdata->vif.link_conf[link_id]->chanctx_conf, conf);
|
|
|
|
sdata->vif.cfg.idle = !conf;
|
|
|
|
if (curr_ctx && ieee80211_chanctx_num_assigned(local, curr_ctx) > 0) {
|
|
ieee80211_recalc_chanctx_chantype(local, curr_ctx);
|
|
ieee80211_recalc_smps_chanctx(local, curr_ctx);
|
|
ieee80211_recalc_radar_chanctx(local, curr_ctx);
|
|
ieee80211_recalc_chanctx_min_def(local, curr_ctx);
|
|
}
|
|
|
|
if (new_ctx && ieee80211_chanctx_num_assigned(local, new_ctx) > 0) {
|
|
ieee80211_recalc_txpower(sdata, false);
|
|
ieee80211_recalc_chanctx_min_def(local, new_ctx);
|
|
}
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
|
|
sdata->vif.type != NL80211_IFTYPE_MONITOR)
|
|
ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_IDLE);
|
|
|
|
ieee80211_check_fast_xmit_iface(sdata);
|
|
|
|
return ret;
|
|
}
|
|
|
|
void ieee80211_recalc_smps_chanctx(struct ieee80211_local *local,
|
|
struct ieee80211_chanctx *chanctx)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata;
|
|
u8 rx_chains_static, rx_chains_dynamic;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
rx_chains_static = 1;
|
|
rx_chains_dynamic = 1;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(sdata, &local->interfaces, list) {
|
|
u8 needed_static, needed_dynamic;
|
|
unsigned int link_id;
|
|
|
|
if (!ieee80211_sdata_running(sdata))
|
|
continue;
|
|
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_STATION:
|
|
if (!sdata->u.mgd.associated)
|
|
continue;
|
|
break;
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_ADHOC:
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
case NL80211_IFTYPE_OCB:
|
|
break;
|
|
default:
|
|
continue;
|
|
}
|
|
|
|
for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) {
|
|
struct ieee80211_link_data *link = sdata->link[link_id];
|
|
struct ieee80211_bss_conf *link_conf =
|
|
sdata->vif.link_conf[link_id];
|
|
|
|
if (!link_conf)
|
|
continue;
|
|
|
|
if (rcu_access_pointer(link_conf->chanctx_conf) != &chanctx->conf)
|
|
continue;
|
|
|
|
switch (link->smps_mode) {
|
|
default:
|
|
WARN_ONCE(1, "Invalid SMPS mode %d\n",
|
|
link->smps_mode);
|
|
fallthrough;
|
|
case IEEE80211_SMPS_OFF:
|
|
needed_static = link->needed_rx_chains;
|
|
needed_dynamic = link->needed_rx_chains;
|
|
break;
|
|
case IEEE80211_SMPS_DYNAMIC:
|
|
needed_static = 1;
|
|
needed_dynamic = link->needed_rx_chains;
|
|
break;
|
|
case IEEE80211_SMPS_STATIC:
|
|
needed_static = 1;
|
|
needed_dynamic = 1;
|
|
break;
|
|
}
|
|
|
|
rx_chains_static = max(rx_chains_static, needed_static);
|
|
rx_chains_dynamic = max(rx_chains_dynamic, needed_dynamic);
|
|
}
|
|
}
|
|
|
|
/* Disable SMPS for the monitor interface */
|
|
sdata = rcu_dereference(local->monitor_sdata);
|
|
if (sdata &&
|
|
rcu_access_pointer(sdata->vif.link_conf[0]->chanctx_conf) == &chanctx->conf)
|
|
rx_chains_dynamic = rx_chains_static = local->rx_chains;
|
|
|
|
rcu_read_unlock();
|
|
|
|
if (!local->use_chanctx) {
|
|
if (rx_chains_static > 1)
|
|
local->smps_mode = IEEE80211_SMPS_OFF;
|
|
else if (rx_chains_dynamic > 1)
|
|
local->smps_mode = IEEE80211_SMPS_DYNAMIC;
|
|
else
|
|
local->smps_mode = IEEE80211_SMPS_STATIC;
|
|
ieee80211_hw_config(local, 0);
|
|
}
|
|
|
|
if (rx_chains_static == chanctx->conf.rx_chains_static &&
|
|
rx_chains_dynamic == chanctx->conf.rx_chains_dynamic)
|
|
return;
|
|
|
|
chanctx->conf.rx_chains_static = rx_chains_static;
|
|
chanctx->conf.rx_chains_dynamic = rx_chains_dynamic;
|
|
drv_change_chanctx(local, chanctx, IEEE80211_CHANCTX_CHANGE_RX_CHAINS);
|
|
}
|
|
|
|
static void
|
|
__ieee80211_link_copy_chanctx_to_vlans(struct ieee80211_link_data *link,
|
|
bool clear)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
unsigned int link_id = link->link_id;
|
|
struct ieee80211_bss_conf *link_conf = sdata->vif.link_conf[link_id];
|
|
struct ieee80211_local *local __maybe_unused = sdata->local;
|
|
struct ieee80211_sub_if_data *vlan;
|
|
struct ieee80211_chanctx_conf *conf;
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP))
|
|
return;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
|
|
/* Check that conf exists, even when clearing this function
|
|
* must be called with the AP's channel context still there
|
|
* as it would otherwise cause VLANs to have an invalid
|
|
* channel context pointer for a while, possibly pointing
|
|
* to a channel context that has already been freed.
|
|
*/
|
|
conf = rcu_dereference_protected(link_conf->chanctx_conf,
|
|
lockdep_is_held(&local->chanctx_mtx));
|
|
WARN_ON(!conf);
|
|
|
|
if (clear)
|
|
conf = NULL;
|
|
|
|
list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
|
|
rcu_assign_pointer(vlan->vif.link_conf[link_id]->chanctx_conf,
|
|
conf);
|
|
}
|
|
|
|
void ieee80211_link_copy_chanctx_to_vlans(struct ieee80211_link_data *link,
|
|
bool clear)
|
|
{
|
|
struct ieee80211_local *local = link->sdata->local;
|
|
|
|
mutex_lock(&local->chanctx_mtx);
|
|
|
|
__ieee80211_link_copy_chanctx_to_vlans(link, clear);
|
|
|
|
mutex_unlock(&local->chanctx_mtx);
|
|
}
|
|
|
|
int ieee80211_link_unreserve_chanctx(struct ieee80211_link_data *link)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
struct ieee80211_chanctx *ctx = link->reserved_chanctx;
|
|
|
|
lockdep_assert_held(&sdata->local->chanctx_mtx);
|
|
|
|
if (WARN_ON(!ctx))
|
|
return -EINVAL;
|
|
|
|
list_del(&link->reserved_chanctx_list);
|
|
link->reserved_chanctx = NULL;
|
|
|
|
if (ieee80211_chanctx_refcount(sdata->local, ctx) == 0) {
|
|
if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) {
|
|
if (WARN_ON(!ctx->replace_ctx))
|
|
return -EINVAL;
|
|
|
|
WARN_ON(ctx->replace_ctx->replace_state !=
|
|
IEEE80211_CHANCTX_WILL_BE_REPLACED);
|
|
WARN_ON(ctx->replace_ctx->replace_ctx != ctx);
|
|
|
|
ctx->replace_ctx->replace_ctx = NULL;
|
|
ctx->replace_ctx->replace_state =
|
|
IEEE80211_CHANCTX_REPLACE_NONE;
|
|
|
|
list_del_rcu(&ctx->list);
|
|
kfree_rcu(ctx, rcu_head);
|
|
} else {
|
|
ieee80211_free_chanctx(sdata->local, ctx);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_link_reserve_chanctx(struct ieee80211_link_data *link,
|
|
const struct cfg80211_chan_def *chandef,
|
|
enum ieee80211_chanctx_mode mode,
|
|
bool radar_required)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx *new_ctx, *curr_ctx, *ctx;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
curr_ctx = ieee80211_link_get_chanctx(link);
|
|
if (curr_ctx && local->use_chanctx && !local->ops->switch_vif_chanctx)
|
|
return -ENOTSUPP;
|
|
|
|
new_ctx = ieee80211_find_reservation_chanctx(local, chandef, mode);
|
|
if (!new_ctx) {
|
|
if (ieee80211_can_create_new_chanctx(local)) {
|
|
new_ctx = ieee80211_new_chanctx(local, chandef, mode);
|
|
if (IS_ERR(new_ctx))
|
|
return PTR_ERR(new_ctx);
|
|
} else {
|
|
if (!curr_ctx ||
|
|
(curr_ctx->replace_state ==
|
|
IEEE80211_CHANCTX_WILL_BE_REPLACED) ||
|
|
!list_empty(&curr_ctx->reserved_links)) {
|
|
/*
|
|
* Another link already requested this context
|
|
* for a reservation. Find another one hoping
|
|
* all links assigned to it will also switch
|
|
* soon enough.
|
|
*
|
|
* TODO: This needs a little more work as some
|
|
* cases (more than 2 chanctx capable devices)
|
|
* may fail which could otherwise succeed
|
|
* provided some channel context juggling was
|
|
* performed.
|
|
*
|
|
* Consider ctx1..3, link1..6, each ctx has 2
|
|
* links. link1 and link2 from ctx1 request new
|
|
* different chandefs starting 2 in-place
|
|
* reserations with ctx4 and ctx5 replacing
|
|
* ctx1 and ctx2 respectively. Next link5 and
|
|
* link6 from ctx3 reserve ctx4. If link3 and
|
|
* link4 remain on ctx2 as they are then this
|
|
* fails unless `replace_ctx` from ctx5 is
|
|
* replaced with ctx3.
|
|
*/
|
|
list_for_each_entry(ctx, &local->chanctx_list,
|
|
list) {
|
|
if (ctx->replace_state !=
|
|
IEEE80211_CHANCTX_REPLACE_NONE)
|
|
continue;
|
|
|
|
if (!list_empty(&ctx->reserved_links))
|
|
continue;
|
|
|
|
curr_ctx = ctx;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* If that's true then all available contexts already
|
|
* have reservations and cannot be used.
|
|
*/
|
|
if (!curr_ctx ||
|
|
(curr_ctx->replace_state ==
|
|
IEEE80211_CHANCTX_WILL_BE_REPLACED) ||
|
|
!list_empty(&curr_ctx->reserved_links))
|
|
return -EBUSY;
|
|
|
|
new_ctx = ieee80211_alloc_chanctx(local, chandef, mode);
|
|
if (!new_ctx)
|
|
return -ENOMEM;
|
|
|
|
new_ctx->replace_ctx = curr_ctx;
|
|
new_ctx->replace_state =
|
|
IEEE80211_CHANCTX_REPLACES_OTHER;
|
|
|
|
curr_ctx->replace_ctx = new_ctx;
|
|
curr_ctx->replace_state =
|
|
IEEE80211_CHANCTX_WILL_BE_REPLACED;
|
|
|
|
list_add_rcu(&new_ctx->list, &local->chanctx_list);
|
|
}
|
|
}
|
|
|
|
list_add(&link->reserved_chanctx_list, &new_ctx->reserved_links);
|
|
link->reserved_chanctx = new_ctx;
|
|
link->reserved_chandef = *chandef;
|
|
link->reserved_radar_required = radar_required;
|
|
link->reserved_ready = false;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
ieee80211_link_chanctx_reservation_complete(struct ieee80211_link_data *link)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
|
|
switch (sdata->vif.type) {
|
|
case NL80211_IFTYPE_ADHOC:
|
|
case NL80211_IFTYPE_AP:
|
|
case NL80211_IFTYPE_MESH_POINT:
|
|
case NL80211_IFTYPE_OCB:
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&link->csa_finalize_work);
|
|
break;
|
|
case NL80211_IFTYPE_STATION:
|
|
ieee80211_queue_work(&sdata->local->hw,
|
|
&sdata->u.mgd.chswitch_work);
|
|
break;
|
|
case NL80211_IFTYPE_UNSPECIFIED:
|
|
case NL80211_IFTYPE_AP_VLAN:
|
|
case NL80211_IFTYPE_WDS:
|
|
case NL80211_IFTYPE_MONITOR:
|
|
case NL80211_IFTYPE_P2P_CLIENT:
|
|
case NL80211_IFTYPE_P2P_GO:
|
|
case NL80211_IFTYPE_P2P_DEVICE:
|
|
case NL80211_IFTYPE_NAN:
|
|
case NUM_NL80211_IFTYPES:
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ieee80211_link_update_chandef(struct ieee80211_link_data *link,
|
|
const struct cfg80211_chan_def *chandef)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
unsigned int link_id = link->link_id;
|
|
struct ieee80211_sub_if_data *vlan;
|
|
|
|
sdata->vif.link_conf[link_id]->chandef = *chandef;
|
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_AP)
|
|
return;
|
|
|
|
list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list)
|
|
vlan->vif.link_conf[link_id]->chandef = *chandef;
|
|
}
|
|
|
|
static int
|
|
ieee80211_link_use_reserved_reassign(struct ieee80211_link_data *link)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
unsigned int link_id = link->link_id;
|
|
struct ieee80211_bss_conf *link_conf = sdata->vif.link_conf[link_id];
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_vif_chanctx_switch vif_chsw[1] = {};
|
|
struct ieee80211_chanctx *old_ctx, *new_ctx;
|
|
const struct cfg80211_chan_def *chandef;
|
|
u32 changed = 0;
|
|
int err;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
new_ctx = link->reserved_chanctx;
|
|
old_ctx = ieee80211_link_get_chanctx(link);
|
|
|
|
if (WARN_ON(!link->reserved_ready))
|
|
return -EBUSY;
|
|
|
|
if (WARN_ON(!new_ctx))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(!old_ctx))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(new_ctx->replace_state ==
|
|
IEEE80211_CHANCTX_REPLACES_OTHER))
|
|
return -EINVAL;
|
|
|
|
chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx,
|
|
&link->reserved_chandef);
|
|
if (WARN_ON(!chandef))
|
|
return -EINVAL;
|
|
|
|
if (link_conf->chandef.width != link->reserved_chandef.width)
|
|
changed = BSS_CHANGED_BANDWIDTH;
|
|
|
|
ieee80211_link_update_chandef(link, &link->reserved_chandef);
|
|
|
|
ieee80211_change_chanctx(local, new_ctx, old_ctx, chandef);
|
|
|
|
vif_chsw[0].vif = &sdata->vif;
|
|
vif_chsw[0].old_ctx = &old_ctx->conf;
|
|
vif_chsw[0].new_ctx = &new_ctx->conf;
|
|
vif_chsw[0].link_id = link->link_id;
|
|
|
|
list_del(&link->reserved_chanctx_list);
|
|
link->reserved_chanctx = NULL;
|
|
|
|
err = drv_switch_vif_chanctx(local, vif_chsw, 1,
|
|
CHANCTX_SWMODE_REASSIGN_VIF);
|
|
if (err) {
|
|
if (ieee80211_chanctx_refcount(local, new_ctx) == 0)
|
|
ieee80211_free_chanctx(local, new_ctx);
|
|
|
|
goto out;
|
|
}
|
|
|
|
list_move(&link->assigned_chanctx_list, &new_ctx->assigned_links);
|
|
rcu_assign_pointer(link_conf->chanctx_conf, &new_ctx->conf);
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP)
|
|
__ieee80211_link_copy_chanctx_to_vlans(link, false);
|
|
|
|
ieee80211_check_fast_xmit_iface(sdata);
|
|
|
|
if (ieee80211_chanctx_refcount(local, old_ctx) == 0)
|
|
ieee80211_free_chanctx(local, old_ctx);
|
|
|
|
ieee80211_recalc_chanctx_min_def(local, new_ctx);
|
|
ieee80211_recalc_smps_chanctx(local, new_ctx);
|
|
ieee80211_recalc_radar_chanctx(local, new_ctx);
|
|
|
|
if (changed)
|
|
ieee80211_link_info_change_notify(sdata, link_id, changed);
|
|
|
|
out:
|
|
ieee80211_link_chanctx_reservation_complete(link);
|
|
return err;
|
|
}
|
|
|
|
static int
|
|
ieee80211_link_use_reserved_assign(struct ieee80211_link_data *link)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
unsigned int link_id = link->link_id;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx *old_ctx, *new_ctx;
|
|
const struct cfg80211_chan_def *chandef;
|
|
int err;
|
|
|
|
old_ctx = ieee80211_vif_get_chanctx(sdata, link_id);
|
|
new_ctx = link->reserved_chanctx;
|
|
|
|
if (WARN_ON(!link->reserved_ready))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(old_ctx))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(!new_ctx))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(new_ctx->replace_state ==
|
|
IEEE80211_CHANCTX_REPLACES_OTHER))
|
|
return -EINVAL;
|
|
|
|
chandef = ieee80211_chanctx_non_reserved_chandef(local, new_ctx,
|
|
&link->reserved_chandef);
|
|
if (WARN_ON(!chandef))
|
|
return -EINVAL;
|
|
|
|
ieee80211_change_chanctx(local, new_ctx, new_ctx, chandef);
|
|
|
|
list_del(&link->reserved_chanctx_list);
|
|
link->reserved_chanctx = NULL;
|
|
|
|
err = ieee80211_assign_link_chanctx(link, new_ctx);
|
|
if (err) {
|
|
if (ieee80211_chanctx_refcount(local, new_ctx) == 0)
|
|
ieee80211_free_chanctx(local, new_ctx);
|
|
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
ieee80211_link_chanctx_reservation_complete(link);
|
|
return err;
|
|
}
|
|
|
|
static bool
|
|
ieee80211_link_has_in_place_reservation(struct ieee80211_link_data *link)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
struct ieee80211_chanctx *old_ctx, *new_ctx;
|
|
|
|
lockdep_assert_held(&sdata->local->chanctx_mtx);
|
|
|
|
new_ctx = link->reserved_chanctx;
|
|
old_ctx = ieee80211_link_get_chanctx(link);
|
|
|
|
if (!old_ctx)
|
|
return false;
|
|
|
|
if (WARN_ON(!new_ctx))
|
|
return false;
|
|
|
|
if (old_ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED)
|
|
return false;
|
|
|
|
if (new_ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static int ieee80211_chsw_switch_hwconf(struct ieee80211_local *local,
|
|
struct ieee80211_chanctx *new_ctx)
|
|
{
|
|
const struct cfg80211_chan_def *chandef;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
chandef = ieee80211_chanctx_reserved_chandef(local, new_ctx, NULL);
|
|
if (WARN_ON(!chandef))
|
|
return -EINVAL;
|
|
|
|
local->hw.conf.radar_enabled = new_ctx->conf.radar_enabled;
|
|
local->_oper_chandef = *chandef;
|
|
ieee80211_hw_config(local, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ieee80211_chsw_switch_vifs(struct ieee80211_local *local,
|
|
int n_vifs)
|
|
{
|
|
struct ieee80211_vif_chanctx_switch *vif_chsw;
|
|
struct ieee80211_link_data *link;
|
|
struct ieee80211_chanctx *ctx, *old_ctx;
|
|
int i, err;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
vif_chsw = kcalloc(n_vifs, sizeof(vif_chsw[0]), GFP_KERNEL);
|
|
if (!vif_chsw)
|
|
return -ENOMEM;
|
|
|
|
i = 0;
|
|
list_for_each_entry(ctx, &local->chanctx_list, list) {
|
|
if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
|
|
continue;
|
|
|
|
if (WARN_ON(!ctx->replace_ctx)) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
list_for_each_entry(link, &ctx->reserved_links,
|
|
reserved_chanctx_list) {
|
|
if (!ieee80211_link_has_in_place_reservation(link))
|
|
continue;
|
|
|
|
old_ctx = ieee80211_link_get_chanctx(link);
|
|
vif_chsw[i].vif = &link->sdata->vif;
|
|
vif_chsw[i].old_ctx = &old_ctx->conf;
|
|
vif_chsw[i].new_ctx = &ctx->conf;
|
|
vif_chsw[i].link_id = link->link_id;
|
|
|
|
i++;
|
|
}
|
|
}
|
|
|
|
err = drv_switch_vif_chanctx(local, vif_chsw, n_vifs,
|
|
CHANCTX_SWMODE_SWAP_CONTEXTS);
|
|
|
|
out:
|
|
kfree(vif_chsw);
|
|
return err;
|
|
}
|
|
|
|
static int ieee80211_chsw_switch_ctxs(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_chanctx *ctx;
|
|
int err;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
list_for_each_entry(ctx, &local->chanctx_list, list) {
|
|
if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
|
|
continue;
|
|
|
|
if (!list_empty(&ctx->replace_ctx->assigned_links))
|
|
continue;
|
|
|
|
ieee80211_del_chanctx(local, ctx->replace_ctx);
|
|
err = ieee80211_add_chanctx(local, ctx);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
WARN_ON(ieee80211_add_chanctx(local, ctx));
|
|
list_for_each_entry_continue_reverse(ctx, &local->chanctx_list, list) {
|
|
if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
|
|
continue;
|
|
|
|
if (!list_empty(&ctx->replace_ctx->assigned_links))
|
|
continue;
|
|
|
|
ieee80211_del_chanctx(local, ctx);
|
|
WARN_ON(ieee80211_add_chanctx(local, ctx->replace_ctx));
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ieee80211_vif_use_reserved_switch(struct ieee80211_local *local)
|
|
{
|
|
struct ieee80211_chanctx *ctx, *ctx_tmp, *old_ctx;
|
|
struct ieee80211_chanctx *new_ctx = NULL;
|
|
int err, n_assigned, n_reserved, n_ready;
|
|
int n_ctx = 0, n_vifs_switch = 0, n_vifs_assign = 0, n_vifs_ctxless = 0;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
/*
|
|
* If there are 2 independent pairs of channel contexts performing
|
|
* cross-switch of their vifs this code will still wait until both are
|
|
* ready even though it could be possible to switch one before the
|
|
* other is ready.
|
|
*
|
|
* For practical reasons and code simplicity just do a single huge
|
|
* switch.
|
|
*/
|
|
|
|
/*
|
|
* Verify if the reservation is still feasible.
|
|
* - if it's not then disconnect
|
|
* - if it is but not all vifs necessary are ready then defer
|
|
*/
|
|
|
|
list_for_each_entry(ctx, &local->chanctx_list, list) {
|
|
struct ieee80211_link_data *link;
|
|
|
|
if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
|
|
continue;
|
|
|
|
if (WARN_ON(!ctx->replace_ctx)) {
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
if (!local->use_chanctx)
|
|
new_ctx = ctx;
|
|
|
|
n_ctx++;
|
|
|
|
n_assigned = 0;
|
|
n_reserved = 0;
|
|
n_ready = 0;
|
|
|
|
list_for_each_entry(link, &ctx->replace_ctx->assigned_links,
|
|
assigned_chanctx_list) {
|
|
n_assigned++;
|
|
if (link->reserved_chanctx) {
|
|
n_reserved++;
|
|
if (link->reserved_ready)
|
|
n_ready++;
|
|
}
|
|
}
|
|
|
|
if (n_assigned != n_reserved) {
|
|
if (n_ready == n_reserved) {
|
|
wiphy_info(local->hw.wiphy,
|
|
"channel context reservation cannot be finalized because some interfaces aren't switching\n");
|
|
err = -EBUSY;
|
|
goto err;
|
|
}
|
|
|
|
return -EAGAIN;
|
|
}
|
|
|
|
ctx->conf.radar_enabled = false;
|
|
list_for_each_entry(link, &ctx->reserved_links,
|
|
reserved_chanctx_list) {
|
|
if (ieee80211_link_has_in_place_reservation(link) &&
|
|
!link->reserved_ready)
|
|
return -EAGAIN;
|
|
|
|
old_ctx = ieee80211_link_get_chanctx(link);
|
|
if (old_ctx) {
|
|
if (old_ctx->replace_state ==
|
|
IEEE80211_CHANCTX_WILL_BE_REPLACED)
|
|
n_vifs_switch++;
|
|
else
|
|
n_vifs_assign++;
|
|
} else {
|
|
n_vifs_ctxless++;
|
|
}
|
|
|
|
if (link->reserved_radar_required)
|
|
ctx->conf.radar_enabled = true;
|
|
}
|
|
}
|
|
|
|
if (WARN_ON(n_ctx == 0) ||
|
|
WARN_ON(n_vifs_switch == 0 &&
|
|
n_vifs_assign == 0 &&
|
|
n_vifs_ctxless == 0) ||
|
|
WARN_ON(n_ctx > 1 && !local->use_chanctx) ||
|
|
WARN_ON(!new_ctx && !local->use_chanctx)) {
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* All necessary vifs are ready. Perform the switch now depending on
|
|
* reservations and driver capabilities.
|
|
*/
|
|
|
|
if (local->use_chanctx) {
|
|
if (n_vifs_switch > 0) {
|
|
err = ieee80211_chsw_switch_vifs(local, n_vifs_switch);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
if (n_vifs_assign > 0 || n_vifs_ctxless > 0) {
|
|
err = ieee80211_chsw_switch_ctxs(local);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
} else {
|
|
err = ieee80211_chsw_switch_hwconf(local, new_ctx);
|
|
if (err)
|
|
goto err;
|
|
}
|
|
|
|
/*
|
|
* Update all structures, values and pointers to point to new channel
|
|
* context(s).
|
|
*/
|
|
list_for_each_entry(ctx, &local->chanctx_list, list) {
|
|
struct ieee80211_link_data *link, *link_tmp;
|
|
|
|
if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
|
|
continue;
|
|
|
|
if (WARN_ON(!ctx->replace_ctx)) {
|
|
err = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
list_for_each_entry(link, &ctx->reserved_links,
|
|
reserved_chanctx_list) {
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
struct ieee80211_bss_conf *link_conf =
|
|
sdata->vif.link_conf[link->link_id];
|
|
u32 changed = 0;
|
|
|
|
if (!ieee80211_link_has_in_place_reservation(link))
|
|
continue;
|
|
|
|
rcu_assign_pointer(link_conf->chanctx_conf,
|
|
&ctx->conf);
|
|
|
|
if (sdata->vif.type == NL80211_IFTYPE_AP)
|
|
__ieee80211_link_copy_chanctx_to_vlans(link,
|
|
false);
|
|
|
|
ieee80211_check_fast_xmit_iface(sdata);
|
|
|
|
link->radar_required = link->reserved_radar_required;
|
|
|
|
if (link_conf->chandef.width != link->reserved_chandef.width)
|
|
changed = BSS_CHANGED_BANDWIDTH;
|
|
|
|
ieee80211_link_update_chandef(link, &link->reserved_chandef);
|
|
if (changed)
|
|
ieee80211_link_info_change_notify(sdata,
|
|
link->link_id,
|
|
changed);
|
|
|
|
ieee80211_recalc_txpower(sdata, false);
|
|
}
|
|
|
|
ieee80211_recalc_chanctx_chantype(local, ctx);
|
|
ieee80211_recalc_smps_chanctx(local, ctx);
|
|
ieee80211_recalc_radar_chanctx(local, ctx);
|
|
ieee80211_recalc_chanctx_min_def(local, ctx);
|
|
|
|
list_for_each_entry_safe(link, link_tmp, &ctx->reserved_links,
|
|
reserved_chanctx_list) {
|
|
if (ieee80211_link_get_chanctx(link) != ctx)
|
|
continue;
|
|
|
|
list_del(&link->reserved_chanctx_list);
|
|
list_move(&link->assigned_chanctx_list,
|
|
&ctx->assigned_links);
|
|
link->reserved_chanctx = NULL;
|
|
|
|
ieee80211_link_chanctx_reservation_complete(link);
|
|
}
|
|
|
|
/*
|
|
* This context might have been a dependency for an already
|
|
* ready re-assign reservation interface that was deferred. Do
|
|
* not propagate error to the caller though. The in-place
|
|
* reservation for originally requested interface has already
|
|
* succeeded at this point.
|
|
*/
|
|
list_for_each_entry_safe(link, link_tmp, &ctx->reserved_links,
|
|
reserved_chanctx_list) {
|
|
if (WARN_ON(ieee80211_link_has_in_place_reservation(link)))
|
|
continue;
|
|
|
|
if (WARN_ON(link->reserved_chanctx != ctx))
|
|
continue;
|
|
|
|
if (!link->reserved_ready)
|
|
continue;
|
|
|
|
if (ieee80211_link_get_chanctx(link))
|
|
err = ieee80211_link_use_reserved_reassign(link);
|
|
else
|
|
err = ieee80211_link_use_reserved_assign(link);
|
|
|
|
if (err) {
|
|
link_info(link,
|
|
"failed to finalize (re-)assign reservation (err=%d)\n",
|
|
err);
|
|
ieee80211_link_unreserve_chanctx(link);
|
|
cfg80211_stop_iface(local->hw.wiphy,
|
|
&link->sdata->wdev,
|
|
GFP_KERNEL);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Finally free old contexts
|
|
*/
|
|
|
|
list_for_each_entry_safe(ctx, ctx_tmp, &local->chanctx_list, list) {
|
|
if (ctx->replace_state != IEEE80211_CHANCTX_WILL_BE_REPLACED)
|
|
continue;
|
|
|
|
ctx->replace_ctx->replace_ctx = NULL;
|
|
ctx->replace_ctx->replace_state =
|
|
IEEE80211_CHANCTX_REPLACE_NONE;
|
|
|
|
list_del_rcu(&ctx->list);
|
|
kfree_rcu(ctx, rcu_head);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err:
|
|
list_for_each_entry(ctx, &local->chanctx_list, list) {
|
|
struct ieee80211_link_data *link, *link_tmp;
|
|
|
|
if (ctx->replace_state != IEEE80211_CHANCTX_REPLACES_OTHER)
|
|
continue;
|
|
|
|
list_for_each_entry_safe(link, link_tmp, &ctx->reserved_links,
|
|
reserved_chanctx_list) {
|
|
ieee80211_link_unreserve_chanctx(link);
|
|
ieee80211_link_chanctx_reservation_complete(link);
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static void __ieee80211_link_release_channel(struct ieee80211_link_data *link)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
unsigned int link_id = link->link_id;
|
|
struct ieee80211_bss_conf *link_conf = sdata->vif.link_conf[link_id];
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx_conf *conf;
|
|
struct ieee80211_chanctx *ctx;
|
|
bool use_reserved_switch = false;
|
|
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
conf = rcu_dereference_protected(link_conf->chanctx_conf,
|
|
lockdep_is_held(&local->chanctx_mtx));
|
|
if (!conf)
|
|
return;
|
|
|
|
ctx = container_of(conf, struct ieee80211_chanctx, conf);
|
|
|
|
if (link->reserved_chanctx) {
|
|
if (link->reserved_chanctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
|
|
ieee80211_chanctx_num_reserved(local, link->reserved_chanctx) > 1)
|
|
use_reserved_switch = true;
|
|
|
|
ieee80211_link_unreserve_chanctx(link);
|
|
}
|
|
|
|
ieee80211_assign_link_chanctx(link, NULL);
|
|
if (ieee80211_chanctx_refcount(local, ctx) == 0)
|
|
ieee80211_free_chanctx(local, ctx);
|
|
|
|
link->radar_required = false;
|
|
|
|
/* Unreserving may ready an in-place reservation. */
|
|
if (use_reserved_switch)
|
|
ieee80211_vif_use_reserved_switch(local);
|
|
}
|
|
|
|
int ieee80211_link_use_channel(struct ieee80211_link_data *link,
|
|
const struct cfg80211_chan_def *chandef,
|
|
enum ieee80211_chanctx_mode mode)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
unsigned int link_id = link->link_id;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx *ctx;
|
|
u8 radar_detect_width = 0;
|
|
int ret;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
|
|
WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev));
|
|
|
|
mutex_lock(&local->chanctx_mtx);
|
|
|
|
ret = cfg80211_chandef_dfs_required(local->hw.wiphy,
|
|
chandef,
|
|
sdata->wdev.iftype);
|
|
if (ret < 0)
|
|
goto out;
|
|
if (ret > 0)
|
|
radar_detect_width = BIT(chandef->width);
|
|
|
|
sdata->link[link_id]->radar_required = ret;
|
|
|
|
ret = ieee80211_check_combinations(sdata, chandef, mode,
|
|
radar_detect_width);
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
__ieee80211_link_release_channel(link);
|
|
|
|
ctx = ieee80211_find_chanctx(local, chandef, mode);
|
|
if (!ctx)
|
|
ctx = ieee80211_new_chanctx(local, chandef, mode);
|
|
if (IS_ERR(ctx)) {
|
|
ret = PTR_ERR(ctx);
|
|
goto out;
|
|
}
|
|
|
|
ieee80211_link_update_chandef(link, chandef);
|
|
|
|
ret = ieee80211_assign_link_chanctx(link, ctx);
|
|
if (ret) {
|
|
/* if assign fails refcount stays the same */
|
|
if (ieee80211_chanctx_refcount(local, ctx) == 0)
|
|
ieee80211_free_chanctx(local, ctx);
|
|
goto out;
|
|
}
|
|
|
|
ieee80211_recalc_smps_chanctx(local, ctx);
|
|
ieee80211_recalc_radar_chanctx(local, ctx);
|
|
out:
|
|
if (ret)
|
|
link->radar_required = false;
|
|
|
|
mutex_unlock(&local->chanctx_mtx);
|
|
return ret;
|
|
}
|
|
|
|
int ieee80211_link_use_reserved_context(struct ieee80211_link_data *link)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx *new_ctx;
|
|
struct ieee80211_chanctx *old_ctx;
|
|
int err;
|
|
|
|
lockdep_assert_held(&local->mtx);
|
|
lockdep_assert_held(&local->chanctx_mtx);
|
|
|
|
new_ctx = link->reserved_chanctx;
|
|
old_ctx = ieee80211_link_get_chanctx(link);
|
|
|
|
if (WARN_ON(!new_ctx))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(new_ctx->replace_state ==
|
|
IEEE80211_CHANCTX_WILL_BE_REPLACED))
|
|
return -EINVAL;
|
|
|
|
if (WARN_ON(link->reserved_ready))
|
|
return -EINVAL;
|
|
|
|
link->reserved_ready = true;
|
|
|
|
if (new_ctx->replace_state == IEEE80211_CHANCTX_REPLACE_NONE) {
|
|
if (old_ctx)
|
|
return ieee80211_link_use_reserved_reassign(link);
|
|
|
|
return ieee80211_link_use_reserved_assign(link);
|
|
}
|
|
|
|
/*
|
|
* In-place reservation may need to be finalized now either if:
|
|
* a) sdata is taking part in the swapping itself and is the last one
|
|
* b) sdata has switched with a re-assign reservation to an existing
|
|
* context readying in-place switching of old_ctx
|
|
*
|
|
* In case of (b) do not propagate the error up because the requested
|
|
* sdata already switched successfully. Just spill an extra warning.
|
|
* The ieee80211_vif_use_reserved_switch() already stops all necessary
|
|
* interfaces upon failure.
|
|
*/
|
|
if ((old_ctx &&
|
|
old_ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED) ||
|
|
new_ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER) {
|
|
err = ieee80211_vif_use_reserved_switch(local);
|
|
if (err && err != -EAGAIN) {
|
|
if (new_ctx->replace_state ==
|
|
IEEE80211_CHANCTX_REPLACES_OTHER)
|
|
return err;
|
|
|
|
wiphy_info(local->hw.wiphy,
|
|
"depending in-place reservation failed (err=%d)\n",
|
|
err);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int ieee80211_link_change_bandwidth(struct ieee80211_link_data *link,
|
|
const struct cfg80211_chan_def *chandef,
|
|
u32 *changed)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
unsigned int link_id = link->link_id;
|
|
struct ieee80211_bss_conf *link_conf = sdata->vif.link_conf[link_id];
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_chanctx_conf *conf;
|
|
struct ieee80211_chanctx *ctx;
|
|
const struct cfg80211_chan_def *compat;
|
|
int ret;
|
|
|
|
if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, chandef,
|
|
IEEE80211_CHAN_DISABLED))
|
|
return -EINVAL;
|
|
|
|
mutex_lock(&local->chanctx_mtx);
|
|
if (cfg80211_chandef_identical(chandef, &link_conf->chandef)) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
if (chandef->width == NL80211_CHAN_WIDTH_20_NOHT ||
|
|
link_conf->chandef.width == NL80211_CHAN_WIDTH_20_NOHT) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
conf = rcu_dereference_protected(link_conf->chanctx_conf,
|
|
lockdep_is_held(&local->chanctx_mtx));
|
|
if (!conf) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
ctx = container_of(conf, struct ieee80211_chanctx, conf);
|
|
|
|
compat = cfg80211_chandef_compatible(&conf->def, chandef);
|
|
if (!compat) {
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
switch (ctx->replace_state) {
|
|
case IEEE80211_CHANCTX_REPLACE_NONE:
|
|
if (!ieee80211_chanctx_reserved_chandef(local, ctx, compat)) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
break;
|
|
case IEEE80211_CHANCTX_WILL_BE_REPLACED:
|
|
/* TODO: Perhaps the bandwidth change could be treated as a
|
|
* reservation itself? */
|
|
ret = -EBUSY;
|
|
goto out;
|
|
case IEEE80211_CHANCTX_REPLACES_OTHER:
|
|
/* channel context that is going to replace another channel
|
|
* context doesn't really exist and shouldn't be assigned
|
|
* anywhere yet */
|
|
WARN_ON(1);
|
|
break;
|
|
}
|
|
|
|
ieee80211_link_update_chandef(link, chandef);
|
|
|
|
ieee80211_recalc_chanctx_chantype(local, ctx);
|
|
|
|
*changed |= BSS_CHANGED_BANDWIDTH;
|
|
ret = 0;
|
|
out:
|
|
mutex_unlock(&local->chanctx_mtx);
|
|
return ret;
|
|
}
|
|
|
|
void ieee80211_link_release_channel(struct ieee80211_link_data *link)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
|
|
WARN_ON(sdata->dev && netif_carrier_ok(sdata->dev));
|
|
|
|
lockdep_assert_held(&sdata->local->mtx);
|
|
|
|
mutex_lock(&sdata->local->chanctx_mtx);
|
|
__ieee80211_link_release_channel(link);
|
|
mutex_unlock(&sdata->local->chanctx_mtx);
|
|
}
|
|
|
|
void ieee80211_link_vlan_copy_chanctx(struct ieee80211_link_data *link)
|
|
{
|
|
struct ieee80211_sub_if_data *sdata = link->sdata;
|
|
unsigned int link_id = link->link_id;
|
|
struct ieee80211_bss_conf *link_conf = sdata->vif.link_conf[link_id];
|
|
struct ieee80211_local *local = sdata->local;
|
|
struct ieee80211_sub_if_data *ap;
|
|
struct ieee80211_chanctx_conf *conf;
|
|
|
|
if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_AP_VLAN || !sdata->bss))
|
|
return;
|
|
|
|
ap = container_of(sdata->bss, struct ieee80211_sub_if_data, u.ap);
|
|
|
|
mutex_lock(&local->chanctx_mtx);
|
|
|
|
conf = rcu_dereference_protected(ap->vif.link_conf[link_id]->chanctx_conf,
|
|
lockdep_is_held(&local->chanctx_mtx));
|
|
rcu_assign_pointer(link_conf->chanctx_conf, conf);
|
|
mutex_unlock(&local->chanctx_mtx);
|
|
}
|
|
|
|
void ieee80211_iter_chan_contexts_atomic(
|
|
struct ieee80211_hw *hw,
|
|
void (*iter)(struct ieee80211_hw *hw,
|
|
struct ieee80211_chanctx_conf *chanctx_conf,
|
|
void *data),
|
|
void *iter_data)
|
|
{
|
|
struct ieee80211_local *local = hw_to_local(hw);
|
|
struct ieee80211_chanctx *ctx;
|
|
|
|
rcu_read_lock();
|
|
list_for_each_entry_rcu(ctx, &local->chanctx_list, list)
|
|
if (ctx->driver_present)
|
|
iter(hw, &ctx->conf, iter_data);
|
|
rcu_read_unlock();
|
|
}
|
|
EXPORT_SYMBOL_GPL(ieee80211_iter_chan_contexts_atomic);
|