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2045 lines
52 KiB
2045 lines
52 KiB
// 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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|
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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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|
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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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|
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lockdep_assert_held(&local->chanctx_mtx); |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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struct ieee80211_local *local __maybe_unused = link->sdata->local; |
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struct ieee80211_chanctx_conf *conf; |
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|
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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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|
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return container_of(conf, struct ieee80211_chanctx, conf); |
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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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|
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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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|
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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 = link->conf; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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return max_bw; |
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} |
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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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rcu_read_lock(); |
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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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rcu_dereference(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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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_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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|
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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.bss_conf.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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/* |
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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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|
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lockdep_assert_held(&local->chanctx_mtx); |
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|
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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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|
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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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|
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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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|
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return IEEE80211_CHANCTX_CHANGE_MIN_WIDTH; |
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} |
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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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|
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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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|
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if (!ieee80211_sdata_running(sta->sdata)) |
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continue; |
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|
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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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rcu_dereference(sdata->vif.link_conf[link_id]); |
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struct link_sta_info *link_sta; |
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|
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if (!link_conf) |
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continue; |
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|
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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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|
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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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|
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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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/* |
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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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/* Check maybe BW narrowed - we do this _before_ calling recalc_chanctx_min_def |
|
* 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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ieee80211_chan_bw_change(local, old_ctx, true); |
|
|
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if (cfg80211_chandef_identical(&ctx->conf.def, chandef)) { |
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ieee80211_recalc_chanctx_min_def(local, ctx); |
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return; |
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} |
|
|
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WARN_ON(!cfg80211_chandef_compatible(&ctx->conf.def, chandef)); |
|
|
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ctx->conf.def = *chandef; |
|
|
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/* check if min chanctx also changed */ |
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changed = IEEE80211_CHANCTX_CHANGE_WIDTH | |
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_ieee80211_recalc_chanctx_min_def(local, ctx); |
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drv_change_chanctx(local, ctx, changed); |
|
|
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if (!local->use_chanctx) { |
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local->_oper_chandef = *chandef; |
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ieee80211_hw_config(local, 0); |
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} |
|
|
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/* check is BW wider */ |
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ieee80211_chan_bw_change(local, old_ctx, false); |
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} |
|
|
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static struct ieee80211_chanctx * |
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ieee80211_find_chanctx(struct ieee80211_local *local, |
|
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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const struct cfg80211_chan_def *compat; |
|
|
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if (ctx->replace_state != IEEE80211_CHANCTX_REPLACE_NONE) |
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continue; |
|
|
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if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) |
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continue; |
|
|
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compat = cfg80211_chandef_compatible(&ctx->conf.def, chandef); |
|
if (!compat) |
|
continue; |
|
|
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compat = ieee80211_chanctx_reserved_chandef(local, ctx, |
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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++) { |
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struct ieee80211_link_data *link; |
|
|
|
link = rcu_dereference(sdata->link[link_id]); |
|
|
|
if (link && link->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_link_data *link; |
|
|
|
link = rcu_dereference(sdata->link[link_id]); |
|
if (!link) |
|
continue; |
|
|
|
if (rcu_access_pointer(link->conf->chanctx_conf) != conf) |
|
continue; |
|
if (!link->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 = |
|
rcu_dereference(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; |
|
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(link->conf->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->conf, curr_ctx); |
|
conf = NULL; |
|
list_del(&link->assigned_chanctx_list); |
|
} |
|
|
|
if (new_ctx) { |
|
ret = drv_assign_vif_chanctx(local, sdata, link->conf, new_ctx); |
|
if (ret) |
|
goto out; |
|
|
|
conf = &new_ctx->conf; |
|
list_add(&link->assigned_chanctx_list, |
|
&new_ctx->assigned_links); |
|
} |
|
|
|
out: |
|
rcu_assign_pointer(link->conf->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; |
|
|
|
link = rcu_dereference(sdata->link[link_id]); |
|
|
|
if (!link) |
|
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.bss_conf.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 = link->conf; |
|
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; |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) { |
|
struct ieee80211_bss_conf *vlan_conf; |
|
|
|
vlan_conf = rcu_dereference(vlan->vif.link_conf[link_id]); |
|
if (WARN_ON(!vlan_conf)) |
|
continue; |
|
|
|
rcu_assign_pointer(vlan_conf->chanctx_conf, conf); |
|
} |
|
rcu_read_unlock(); |
|
} |
|
|
|
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, |
|
&link->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; |
|
|
|
link->conf->chandef = *chandef; |
|
|
|
if (sdata->vif.type != NL80211_IFTYPE_AP) |
|
return; |
|
|
|
rcu_read_lock(); |
|
list_for_each_entry(vlan, &sdata->u.ap.vlans, u.vlan.list) { |
|
struct ieee80211_bss_conf *vlan_conf; |
|
|
|
vlan_conf = rcu_dereference(vlan->vif.link_conf[link_id]); |
|
if (WARN_ON(!vlan_conf)) |
|
continue; |
|
|
|
vlan_conf->chandef = *chandef; |
|
} |
|
rcu_read_unlock(); |
|
} |
|
|
|
static int |
|
ieee80211_link_use_reserved_reassign(struct ieee80211_link_data *link) |
|
{ |
|
struct ieee80211_sub_if_data *sdata = link->sdata; |
|
struct ieee80211_bss_conf *link_conf = link->conf; |
|
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_conf = link->conf; |
|
|
|
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, 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; |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_chanctx *old_ctx, *new_ctx; |
|
const struct cfg80211_chan_def *chandef; |
|
int err; |
|
|
|
old_ctx = ieee80211_link_get_chanctx(link); |
|
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_conf = link->conf; |
|
|
|
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 = link->conf; |
|
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, |
|
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; |
|
struct ieee80211_bss_conf *link_conf = link->conf; |
|
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; |
|
struct ieee80211_local *local = sdata->local; |
|
struct ieee80211_chanctx *ctx; |
|
u8 radar_detect_width = 0; |
|
int ret; |
|
|
|
lockdep_assert_held(&local->mtx); |
|
|
|
if (sdata->vif.active_links && |
|
!(sdata->vif.active_links & BIT(link->link_id))) { |
|
ieee80211_link_update_chandef(link, chandef); |
|
return 0; |
|
} |
|
|
|
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); |
|
|
|
link->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; |
|
struct ieee80211_bss_conf *link_conf = link->conf; |
|
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; |
|
|
|
mutex_lock(&sdata->local->chanctx_mtx); |
|
if (rcu_access_pointer(link->conf->chanctx_conf)) { |
|
lockdep_assert_held(&sdata->local->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 = link->conf; |
|
struct ieee80211_bss_conf *ap_conf; |
|
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); |
|
|
|
rcu_read_lock(); |
|
ap_conf = rcu_dereference(ap->vif.link_conf[link_id]); |
|
conf = rcu_dereference_protected(ap_conf->chanctx_conf, |
|
lockdep_is_held(&local->chanctx_mtx)); |
|
rcu_assign_pointer(link_conf->chanctx_conf, conf); |
|
rcu_read_unlock(); |
|
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);
|
|
|