mirror of
https://github.com/torvalds/linux
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3b8d81e020
With the internal 'pending' queue system in place, we can simply put packets there instead of pushing them off to the master dev, getting rid of the master interface completely. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
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* Copyright 2004, Instant802 Networks, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/netdevice.h>
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#include <linux/skbuff.h>
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#include <linux/module.h>
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#include <linux/if_arp.h>
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#include <linux/types.h>
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#include <net/ip.h>
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#include <net/pkt_sched.h>
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#include <net/mac80211.h>
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#include "ieee80211_i.h"
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#include "wme.h"
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/* Default mapping in classifier to work with default
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* queue setup.
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*/
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const int ieee802_1d_to_ac[8] = { 2, 3, 3, 2, 1, 1, 0, 0 };
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static int wme_downgrade_ac(struct sk_buff *skb)
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{
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switch (skb->priority) {
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case 6:
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case 7:
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skb->priority = 5; /* VO -> VI */
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return 0;
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case 4:
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case 5:
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skb->priority = 3; /* VI -> BE */
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return 0;
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case 0:
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case 3:
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skb->priority = 2; /* BE -> BK */
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return 0;
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default:
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return -1;
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}
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}
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/* Indicate which queue to use. */
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static u16 classify80211(struct ieee80211_local *local, struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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if (!ieee80211_is_data(hdr->frame_control)) {
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/* management frames go on AC_VO queue, but are sent
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* without QoS control fields */
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return 0;
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}
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if (0 /* injected */) {
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/* use AC from radiotap */
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}
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if (!ieee80211_is_data_qos(hdr->frame_control)) {
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skb->priority = 0; /* required for correct WPA/11i MIC */
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return ieee802_1d_to_ac[skb->priority];
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}
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/* use the data classifier to determine what 802.1d tag the
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* data frame has */
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skb->priority = cfg80211_classify8021d(skb);
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/* in case we are a client verify acm is not set for this ac */
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while (unlikely(local->wmm_acm & BIT(skb->priority))) {
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if (wme_downgrade_ac(skb)) {
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/*
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* This should not really happen. The AP has marked all
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* lower ACs to require admission control which is not
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* a reasonable configuration. Allow the frame to be
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* transmitted using AC_BK as a workaround.
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*/
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break;
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}
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}
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/* look up which queue to use for frames with this 1d tag */
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return ieee802_1d_to_ac[skb->priority];
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}
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void ieee80211_select_queue(struct ieee80211_local *local, struct sk_buff *skb)
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{
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struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data;
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u16 queue;
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u8 tid;
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queue = classify80211(local, skb);
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if (unlikely(queue >= local->hw.queues))
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queue = local->hw.queues - 1;
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/*
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* Now we know the 1d priority, fill in the QoS header if
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* there is one (and we haven't done this before).
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*/
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if (ieee80211_is_data_qos(hdr->frame_control)) {
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u8 *p = ieee80211_get_qos_ctl(hdr);
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u8 ack_policy = 0;
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tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
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if (unlikely(local->wifi_wme_noack_test))
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ack_policy |= QOS_CONTROL_ACK_POLICY_NOACK <<
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QOS_CONTROL_ACK_POLICY_SHIFT;
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/* qos header is 2 bytes, second reserved */
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*p++ = ack_policy | tid;
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*p = 0;
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}
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skb_set_queue_mapping(skb, queue);
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}
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