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linux-next/net/mac80211/rate.h
Johannes Berg e8e4f5280d mac80211: reject/clear user rate mask if not usable
If the user rate mask results in no (basic) rates being usable,
clear it. Also, if we're already operating when it's set, reject
it instead.

Technically, selecting basic rates as the criterion is a bit too
restrictive, but calculating the usable rates over all stations
(e.g. in AP mode) is harder, and all stations must support the
basic rates. Similarly, in client mode, the basic rates will be
used anyway for control frames.

This fixes the "no supported rates (...) in rate_mask ..." warning
that occurs on TX when you've selected a rate mask that's not
compatible with the connection (e.g. an AP that enables only the
rates 36, 48, 54 and you've selected only 6, 9, 12.)

Reported-by: Kirtika Ruchandani <kirtika@google.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2017-03-08 14:20:01 +01:00

151 lines
4.1 KiB
C

/*
* Copyright 2002-2005, Instant802 Networks, Inc.
* Copyright 2005, Devicescape Software, Inc.
* Copyright (c) 2006 Jiri Benc <jbenc@suse.cz>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef IEEE80211_RATE_H
#define IEEE80211_RATE_H
#include <linux/netdevice.h>
#include <linux/skbuff.h>
#include <linux/types.h>
#include <net/mac80211.h>
#include "ieee80211_i.h"
#include "sta_info.h"
#include "driver-ops.h"
struct rate_control_ref {
const struct rate_control_ops *ops;
void *priv;
};
void rate_control_get_rate(struct ieee80211_sub_if_data *sdata,
struct sta_info *sta,
struct ieee80211_tx_rate_control *txrc);
static inline void rate_control_tx_status(struct ieee80211_local *local,
struct ieee80211_supported_band *sband,
struct sta_info *sta,
struct sk_buff *skb)
{
struct rate_control_ref *ref = local->rate_ctrl;
struct ieee80211_sta *ista = &sta->sta;
void *priv_sta = sta->rate_ctrl_priv;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
return;
spin_lock_bh(&sta->rate_ctrl_lock);
if (ref->ops->tx_status)
ref->ops->tx_status(ref->priv, sband, ista, priv_sta, skb);
else
ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
spin_unlock_bh(&sta->rate_ctrl_lock);
}
static inline void
rate_control_tx_status_noskb(struct ieee80211_local *local,
struct ieee80211_supported_band *sband,
struct sta_info *sta,
struct ieee80211_tx_info *info)
{
struct rate_control_ref *ref = local->rate_ctrl;
struct ieee80211_sta *ista = &sta->sta;
void *priv_sta = sta->rate_ctrl_priv;
if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
return;
if (WARN_ON_ONCE(!ref->ops->tx_status_noskb))
return;
spin_lock_bh(&sta->rate_ctrl_lock);
ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
spin_unlock_bh(&sta->rate_ctrl_lock);
}
void rate_control_rate_init(struct sta_info *sta);
void rate_control_rate_update(struct ieee80211_local *local,
struct ieee80211_supported_band *sband,
struct sta_info *sta, u32 changed);
static inline void *rate_control_alloc_sta(struct rate_control_ref *ref,
struct sta_info *sta, gfp_t gfp)
{
spin_lock_init(&sta->rate_ctrl_lock);
return ref->ops->alloc_sta(ref->priv, &sta->sta, gfp);
}
static inline void rate_control_free_sta(struct sta_info *sta)
{
struct rate_control_ref *ref = sta->rate_ctrl;
struct ieee80211_sta *ista = &sta->sta;
void *priv_sta = sta->rate_ctrl_priv;
ref->ops->free_sta(ref->priv, ista, priv_sta);
}
static inline void rate_control_add_sta_debugfs(struct sta_info *sta)
{
#ifdef CONFIG_MAC80211_DEBUGFS
struct rate_control_ref *ref = sta->rate_ctrl;
if (ref && sta->debugfs_dir && ref->ops->add_sta_debugfs)
ref->ops->add_sta_debugfs(ref->priv, sta->rate_ctrl_priv,
sta->debugfs_dir);
#endif
}
static inline void rate_control_remove_sta_debugfs(struct sta_info *sta)
{
#ifdef CONFIG_MAC80211_DEBUGFS
struct rate_control_ref *ref = sta->rate_ctrl;
if (ref && ref->ops->remove_sta_debugfs)
ref->ops->remove_sta_debugfs(ref->priv, sta->rate_ctrl_priv);
#endif
}
void ieee80211_check_rate_mask(struct ieee80211_sub_if_data *sdata);
/* Get a reference to the rate control algorithm. If `name' is NULL, get the
* first available algorithm. */
int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local,
const char *name);
void rate_control_deinitialize(struct ieee80211_local *local);
/* Rate control algorithms */
#ifdef CONFIG_MAC80211_RC_MINSTREL
int rc80211_minstrel_init(void);
void rc80211_minstrel_exit(void);
#else
static inline int rc80211_minstrel_init(void)
{
return 0;
}
static inline void rc80211_minstrel_exit(void)
{
}
#endif
#ifdef CONFIG_MAC80211_RC_MINSTREL_HT
int rc80211_minstrel_ht_init(void);
void rc80211_minstrel_ht_exit(void);
#else
static inline int rc80211_minstrel_ht_init(void)
{
return 0;
}
static inline void rc80211_minstrel_ht_exit(void)
{
}
#endif
#endif /* IEEE80211_RATE_H */