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cfg80211: add KHz variants of frame RX API 

Drivers may wish to report the RX frequency in units of
KHz. Provide cfg80211_rx_mgmt_khz() and wrap it with
cfg80211_rx_mgmt() so exisiting drivers which can't report
KHz anyway don't need to change. Add a similar wrapper for
cfg80211_report_obss_beacon() so the frequency units stay
somewhat consistent.

This doesn't actually change the nl80211 API yet.

Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>
Link: https://lore.kernel.org/r/20200430172554.18383-2-thomas@adapt-ip.com
[fix mac80211 calling the non-khz version of obss beacon report,
 drop trace point name changes]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Thomas Pedersen 2020-04-30 10:25:50 -07:00 committed by Johannes Berg
parent c03369558c
commit e76fede8bf
6 changed files with 71 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/linux/ieee80211.h
View File

@ -3333,6 +3333,8 @@ static inline int ieee80211_get_tdls_action(struct sk_buff *skb, u32 hdr_size)
/* convert frequencies */
#define MHZ_TO_KHZ(freq) ((freq) * 1000)
#define KHZ_TO_MHZ(freq) ((freq) / 1000)
#define PR_KHZ(f) KHZ_TO_MHZ(f), f % 1000
#define KHZ_F "%d.%03d"
/* convert powers */
#define DBI_TO_MBI(gain) ((gain) * 100)

54
include/net/cfg80211.h
View File

@ -6988,6 +6988,26 @@ void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
enum nl80211_connect_failed_reason reason,
gfp_t gfp);
/**
* cfg80211_rx_mgmt_khz - notification of received, unprocessed management frame
* @wdev: wireless device receiving the frame
* @freq: Frequency on which the frame was received in KHz
* @sig_dbm: signal strength in dBm, or 0 if unknown
* @buf: Management frame (header + body)
* @len: length of the frame data
* @flags: flags, as defined in enum nl80211_rxmgmt_flags
*
* This function is called whenever an Action frame is received for a station
* mode interface, but is not processed in kernel.
*
* Return: %true if a user space application has registered for this frame.
* For action frames, that makes it responsible for rejecting unrecognized
* action frames; %false otherwise, in which case for action frames the
* driver is responsible for rejecting the frame.
*/
bool cfg80211_rx_mgmt_khz(struct wireless_dev *wdev, int freq, int sig_dbm,
const u8 *buf, size_t len, u32 flags);
/**
* cfg80211_rx_mgmt - notification of received, unprocessed management frame
* @wdev: wireless device receiving the frame
@ -7005,8 +7025,13 @@ void cfg80211_conn_failed(struct net_device *dev, const u8 *mac_addr,
* action frames; %false otherwise, in which case for action frames the
* driver is responsible for rejecting the frame.
*/
bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_dbm,
const u8 *buf, size_t len, u32 flags);
static inline bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq,
int sig_dbm, const u8 *buf, size_t len,
u32 flags)
{
return cfg80211_rx_mgmt_khz(wdev, MHZ_TO_KHZ(freq), sig_dbm, buf, len,
flags);
}
/**
* cfg80211_mgmt_tx_status - notification of TX status for management frame
@ -7204,6 +7229,21 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
u64 cookie, bool acked, s32 ack_signal,
bool is_valid_ack_signal, gfp_t gfp);
/**
* cfg80211_report_obss_beacon_khz - report beacon from other APs
* @wiphy: The wiphy that received the beacon
* @frame: the frame
* @len: length of the frame
* @freq: frequency the frame was received on in KHz
* @sig_dbm: signal strength in dBm, or 0 if unknown
*
* Use this function to report to userspace when a beacon was
* received. It is not useful to call this when there is no
* netdev that is in AP/GO mode.
*/
void cfg80211_report_obss_beacon_khz(struct wiphy *wiphy, const u8 *frame,
size_t len, int freq, int sig_dbm);
/**
* cfg80211_report_obss_beacon - report beacon from other APs
* @wiphy: The wiphy that received the beacon
@ -7216,9 +7256,13 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
* received. It is not useful to call this when there is no
* netdev that is in AP/GO mode.
*/
void cfg80211_report_obss_beacon(struct wiphy *wiphy,
const u8 *frame, size_t len,
int freq, int sig_dbm);
static inline void cfg80211_report_obss_beacon(struct wiphy *wiphy,
const u8 *frame, size_t len,
int freq, int sig_dbm)
{
cfg80211_report_obss_beacon_khz(wiphy, frame, len, MHZ_TO_KHZ(freq),
sig_dbm);
}
/**
* cfg80211_reg_can_beacon - check if beaconing is allowed

12
net/mac80211/rx.c
View File

@ -3095,9 +3095,10 @@ ieee80211_rx_h_mgmt_check(struct ieee80211_rx_data *rx)
!(status->flag & RX_FLAG_NO_SIGNAL_VAL))
sig = status->signal;
cfg80211_report_obss_beacon(rx->local->hw.wiphy,
rx->skb->data, rx->skb->len,
status->freq, sig);
cfg80211_report_obss_beacon_khz(rx->local->hw.wiphy,
rx->skb->data, rx->skb->len,
ieee80211_rx_status_to_khz(status),
sig);
rx->flags |= IEEE80211_RX_BEACON_REPORTED;
}
@ -3443,8 +3444,9 @@ ieee80211_rx_h_userspace_mgmt(struct ieee80211_rx_data *rx)
!(status->flag & RX_FLAG_NO_SIGNAL_VAL))
sig = status->signal;
if (cfg80211_rx_mgmt(&rx->sdata->wdev, status->freq, sig,
rx->skb->data, rx->skb->len, 0)) {
if (cfg80211_rx_mgmt_khz(&rx->sdata->wdev,
ieee80211_rx_status_to_khz(status), sig,
rx->skb->data, rx->skb->len, 0)) {
if (rx->sta)
rx->sta->rx_stats.packets++;
dev_kfree_skb(rx->skb);

6
net/wireless/mlme.c
View File

@ -729,8 +729,8 @@ int cfg80211_mlme_mgmt_tx(struct cfg80211_registered_device *rdev,
return rdev_mgmt_tx(rdev, wdev, params, cookie);
}
bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_dbm,
const u8 *buf, size_t len, u32 flags)
bool cfg80211_rx_mgmt_khz(struct wireless_dev *wdev, int freq, int sig_dbm,
const u8 *buf, size_t len, u32 flags)
{
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
@ -785,7 +785,7 @@ bool cfg80211_rx_mgmt(struct wireless_dev *wdev, int freq, int sig_dbm,
trace_cfg80211_return_bool(result);
return result;
}
EXPORT_SYMBOL(cfg80211_rx_mgmt);
EXPORT_SYMBOL(cfg80211_rx_mgmt_khz);
void cfg80211_sched_dfs_chan_update(struct cfg80211_registered_device *rdev)
{

12
net/wireless/nl80211.c
View File

@ -16214,7 +16214,7 @@ int nl80211_send_mgmt(struct cfg80211_registered_device *rdev,
netdev->ifindex)) ||
nla_put_u64_64bit(msg, NL80211_ATTR_WDEV, wdev_id(wdev),
NL80211_ATTR_PAD) ||
nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq) ||
nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, KHZ_TO_MHZ(freq)) ||
(sig_dbm &&
nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
nla_put(msg, NL80211_ATTR_FRAME, len, buf) ||
@ -16840,9 +16840,8 @@ void cfg80211_probe_status(struct net_device *dev, const u8 *addr,
}
EXPORT_SYMBOL(cfg80211_probe_status);
void cfg80211_report_obss_beacon(struct wiphy *wiphy,
const u8 *frame, size_t len,
int freq, int sig_dbm)
void cfg80211_report_obss_beacon_khz(struct wiphy *wiphy, const u8 *frame,
size_t len, int freq, int sig_dbm)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
struct sk_buff *msg;
@ -16865,7 +16864,8 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy,
if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
(freq &&
nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ, freq)) ||
nla_put_u32(msg, NL80211_ATTR_WIPHY_FREQ,
KHZ_TO_MHZ(freq))) ||
(sig_dbm &&
nla_put_u32(msg, NL80211_ATTR_RX_SIGNAL_DBM, sig_dbm)) ||
nla_put(msg, NL80211_ATTR_FRAME, len, frame))
@ -16882,7 +16882,7 @@ void cfg80211_report_obss_beacon(struct wiphy *wiphy,
spin_unlock_bh(&rdev->beacon_registrations_lock);
nlmsg_free(msg);
}
EXPORT_SYMBOL(cfg80211_report_obss_beacon);
EXPORT_SYMBOL(cfg80211_report_obss_beacon_khz);
#ifdef CONFIG_PM
static int cfg80211_net_detect_results(struct sk_buff *msg,

8
net/wireless/trace.h
View File

@ -2840,8 +2840,8 @@ TRACE_EVENT(cfg80211_rx_mgmt,
__entry->freq = freq;
__entry->sig_dbm = sig_dbm;
),
TP_printk(WDEV_PR_FMT ", freq: %d, sig dbm: %d",
WDEV_PR_ARG, __entry->freq, __entry->sig_dbm)
TP_printk(WDEV_PR_FMT ", freq: "KHZ_F", sig dbm: %d",
WDEV_PR_ARG, PR_KHZ(__entry->freq), __entry->sig_dbm)
);
TRACE_EVENT(cfg80211_mgmt_tx_status,
@ -3121,8 +3121,8 @@ TRACE_EVENT(cfg80211_report_obss_beacon,
__entry->freq = freq;
__entry->sig_dbm = sig_dbm;
),
TP_printk(WIPHY_PR_FMT ", freq: %d, sig_dbm: %d",
WIPHY_PR_ARG, __entry->freq, __entry->sig_dbm)
TP_printk(WIPHY_PR_FMT ", freq: "KHZ_F", sig_dbm: %d",
WIPHY_PR_ARG, PR_KHZ(__entry->freq), __entry->sig_dbm)
);
TRACE_EVENT(cfg80211_tdls_oper_request,