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cfg80211: support TX error rate CQM 

Let the user configure serveral TX error conection quality monitoring
parameters: % error rate, survey interval, and # of attempted packets.

On exceeding the TX failure rate over the given interval, the driver
will send a CQM notify event with the actual TX failure rate and
packets attempted.

Signed-off-by: Thomas Pedersen <c_tpeder@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Thomas Pedersen 2012-07-12 16:17:33 -07:00 committed by Johannes Berg
parent 00f5335079
commit 84f10708f7
5 changed files with 140 additions and 0 deletions
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16
include/linux/nl80211.h
View File

@ -1550,6 +1550,8 @@ enum nl80211_attrs {
/* default RSSI threshold for scan results if none specified. */
#define NL80211_SCAN_RSSI_THOLD_OFF -300
#define NL80211_CQM_TXE_MAX_INTVL 1800
/**
* enum nl80211_iftype - (virtual) interface types
*
@ -2589,6 +2591,17 @@ enum nl80211_ps_state {
* @NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT: RSSI threshold event
* @NL80211_ATTR_CQM_PKT_LOSS_EVENT: a u32 value indicating that this many
* consecutive packets were not acknowledged by the peer
* @NL80211_ATTR_CQM_TXE_RATE: TX error rate in %. Minimum % of TX failures
* during the given %NL80211_ATTR_CQM_TXE_INTVL before an
* %NL80211_CMD_NOTIFY_CQM with reported %NL80211_ATTR_CQM_TXE_RATE and
* %NL80211_ATTR_CQM_TXE_PKTS is generated.
* @NL80211_ATTR_CQM_TXE_PKTS: number of attempted packets in a given
* %NL80211_ATTR_CQM_TXE_INTVL before %NL80211_ATTR_CQM_TXE_RATE is
* checked.
* @NL80211_ATTR_CQM_TXE_INTVL: interval in seconds. Specifies the periodic
* interval in which %NL80211_ATTR_CQM_TXE_PKTS and
* %NL80211_ATTR_CQM_TXE_RATE must be satisfied before generating an
* %NL80211_CMD_NOTIFY_CQM. Set to 0 to turn off TX error reporting.
* @__NL80211_ATTR_CQM_AFTER_LAST: internal
* @NL80211_ATTR_CQM_MAX: highest key attribute
*/
@ -2598,6 +2611,9 @@ enum nl80211_attr_cqm {
NL80211_ATTR_CQM_RSSI_HYST,
NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
NL80211_ATTR_CQM_PKT_LOSS_EVENT,
NL80211_ATTR_CQM_TXE_RATE,
NL80211_ATTR_CQM_TXE_PKTS,
NL80211_ATTR_CQM_TXE_INTVL,
/* keep last */
__NL80211_ATTR_CQM_AFTER_LAST,

21
include/net/cfg80211.h
View File

@ -1573,6 +1573,8 @@ struct cfg80211_gtk_rekey_data {
* @set_power_mgmt: Configure WLAN power management. A timeout value of -1
* allows the driver to adjust the dynamic ps timeout value.
* @set_cqm_rssi_config: Configure connection quality monitor RSSI threshold.
* @set_cqm_txe_config: Configure connection quality monitor TX error
* thresholds.
* @sched_scan_start: Tell the driver to start a scheduled scan.
* @sched_scan_stop: Tell the driver to stop an ongoing scheduled
* scan. The driver_initiated flag specifies whether the driver
@ -1783,6 +1785,10 @@ struct cfg80211_ops {
struct net_device *dev,
s32 rssi_thold, u32 rssi_hyst);
int (*set_cqm_txe_config)(struct wiphy *wiphy,
struct net_device *dev,
u32 rate, u32 pkts, u32 intvl);
void (*mgmt_frame_register)(struct wiphy *wiphy,
struct wireless_dev *wdev,
u16 frame_type, bool reg);
@ -3395,6 +3401,21 @@ void cfg80211_cqm_rssi_notify(struct net_device *dev,
void cfg80211_cqm_pktloss_notify(struct net_device *dev,
const u8 *peer, u32 num_packets, gfp_t gfp);
/**
* cfg80211_cqm_txe_notify - TX error rate event
* @dev: network device
* @peer: peer's MAC address
* @num_packets: how many packets were lost
* @rate: % of packets which failed transmission
* @intvl: interval (in s) over which the TX failure threshold was breached.
* @gfp: context flags
*
* Notify userspace when configured % TX failures over number of packets in a
* given interval is exceeded.
*/
void cfg80211_cqm_txe_notify(struct net_device *dev, const u8 *peer,
u32 num_packets, u32 rate, u32 intvl, gfp_t gfp);
/**
* cfg80211_gtk_rekey_notify - notify userspace about driver rekeying
* @dev: network device

13
net/wireless/mlme.c
View File

@ -919,6 +919,19 @@ void cfg80211_cqm_pktloss_notify(struct net_device *dev,
}
EXPORT_SYMBOL(cfg80211_cqm_pktloss_notify);
void cfg80211_cqm_txe_notify(struct net_device *dev,
const u8 *peer, u32 num_packets,
u32 rate, u32 intvl, gfp_t gfp)
{
struct wireless_dev *wdev = dev->ieee80211_ptr;
struct wiphy *wiphy = wdev->wiphy;
struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
nl80211_send_cqm_txe_notify(rdev, dev, peer, num_packets,
rate, intvl, gfp);
}
EXPORT_SYMBOL(cfg80211_cqm_txe_notify);
void cfg80211_gtk_rekey_notify(struct net_device *dev, const u8 *bssid,
const u8 *replay_ctr, gfp_t gfp)
{

85
net/wireless/nl80211.c
View File

@ -6267,8 +6267,35 @@ nl80211_attr_cqm_policy[NL80211_ATTR_CQM_MAX + 1] __read_mostly = {
[NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_TXE_RATE] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_TXE_PKTS] = { .type = NLA_U32 },
[NL80211_ATTR_CQM_TXE_INTVL] = { .type = NLA_U32 },
};
static int nl80211_set_cqm_txe(struct genl_info *info,
u32 rate, u32 pkts, u32 intvl)
{
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct wireless_dev *wdev;
struct net_device *dev = info->user_ptr[1];
if ((rate < 0 || rate > 100) ||
(intvl < 0 || intvl > NL80211_CQM_TXE_MAX_INTVL))
return -EINVAL;
wdev = dev->ieee80211_ptr;
if (!rdev->ops->set_cqm_txe_config)
return -EOPNOTSUPP;
if (wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
return -EOPNOTSUPP;
return rdev->ops->set_cqm_txe_config(wdev->wiphy, dev,
rate, pkts, intvl);
}
static int nl80211_set_cqm_rssi(struct genl_info *info,
s32 threshold, u32 hysteresis)
{
@ -6316,6 +6343,14 @@ static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
threshold = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_THOLD]);
hysteresis = nla_get_u32(attrs[NL80211_ATTR_CQM_RSSI_HYST]);
err = nl80211_set_cqm_rssi(info, threshold, hysteresis);
} else if (attrs[NL80211_ATTR_CQM_TXE_RATE] &&
attrs[NL80211_ATTR_CQM_TXE_PKTS] &&
attrs[NL80211_ATTR_CQM_TXE_INTVL]) {
u32 rate, pkts, intvl;
rate = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_RATE]);
pkts = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_PKTS]);
intvl = nla_get_u32(attrs[NL80211_ATTR_CQM_TXE_INTVL]);
err = nl80211_set_cqm_txe(info, rate, pkts, intvl);
} else
err = -EINVAL;
@ -8495,6 +8530,56 @@ void nl80211_ch_switch_notify(struct cfg80211_registered_device *rdev,
nlmsg_free(msg);
}
void
nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *peer,
u32 num_packets, u32 rate, u32 intvl, gfp_t gfp)
{
struct sk_buff *msg;
struct nlattr *pinfoattr;
void *hdr;
msg = nlmsg_new(NLMSG_GOODSIZE, gfp);
if (!msg)
return;
hdr = nl80211hdr_put(msg, 0, 0, 0, NL80211_CMD_NOTIFY_CQM);
if (!hdr) {
nlmsg_free(msg);
return;
}
if (nla_put_u32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx) ||
nla_put_u32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex) ||
nla_put(msg, NL80211_ATTR_MAC, ETH_ALEN, peer))
goto nla_put_failure;
pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
if (!pinfoattr)
goto nla_put_failure;
if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_PKTS, num_packets))
goto nla_put_failure;
if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_RATE, rate))
goto nla_put_failure;
if (nla_put_u32(msg, NL80211_ATTR_CQM_TXE_INTVL, intvl))
goto nla_put_failure;
nla_nest_end(msg, pinfoattr);
genlmsg_end(msg, hdr);
genlmsg_multicast_netns(wiphy_net(&rdev->wiphy), msg, 0,
nl80211_mlme_mcgrp.id, gfp);
return;
nla_put_failure:
genlmsg_cancel(msg, hdr);
nlmsg_free(msg);
}
void
nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *peer,

5
net/wireless/nl80211.h
View File

@ -110,6 +110,11 @@ nl80211_send_cqm_pktloss_notify(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *peer,
u32 num_packets, gfp_t gfp);
void
nl80211_send_cqm_txe_notify(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *peer,
u32 num_packets, u32 rate, u32 intvl, gfp_t gfp);
void nl80211_gtk_rekey_notify(struct cfg80211_registered_device *rdev,
struct net_device *netdev, const u8 *bssid,
const u8 *replay_ctr, gfp_t gfp);