Add calls for accepting nl80211 bitrate thresholds from user space,
and add a function calls for sending out threshold notifications.
Signed-off-by: Paul Stewart <pstew@xxxxxxxxxx>
---
include/linux/nl80211.h | 10 +++++-
include/net/cfg80211.h | 18 ++++++++++
net/wireless/mlme.c | 13 +++++++
net/wireless/nl80211.c | 86 +++++++++++++++++++++++++++++++++++++++++++++-
net/wireless/nl80211.h | 6 +++
5 files changed, 130 insertions(+), 3 deletions(-)
diff --git a/include/linux/nl80211.h b/include/linux/nl80211.h
index 0edb256..9cd12b6 100644
--- a/include/linux/nl80211.h
+++ b/include/linux/nl80211.h
@@ -1785,7 +1785,13 @@ enum nl80211_ps_state {
* @NL80211_ATTR_CQM_RSSI_HYST: RSSI hysteresis in dBm. This value specifies
* the minimum amount the RSSI level must change after an event before a
* new event may be issued (to reduce effects of RSSI oscillation).
- * @NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT: RSSI threshold event
+ * @NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT: RSSI threshold event. This provides
+ * the current bitrate (in 1000 bits per second) at the time that a
+ * threshold was crossed.
+ * @NL80211_ATTR_CQM_BITRATE_THOLD: Bitrate threshold in 1000 bits per second.
+ * This specifies the threshold at which an event will be sent. Set to
+ * zero to disable.
+ * @NL80211_ATTR_CQM_BITRATE_THRESHOLD_EVENT: New transmit bitrate
* @__NL80211_ATTR_CQM_AFTER_LAST: internal
* @NL80211_ATTR_CQM_MAX: highest key attribute
*/
@@ -1794,6 +1800,8 @@ enum nl80211_attr_cqm {
NL80211_ATTR_CQM_RSSI_THOLD,
NL80211_ATTR_CQM_RSSI_HYST,
NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT,
+ NL80211_ATTR_CQM_BITRATE_THOLD,
+ NL80211_ATTR_CQM_BITRATE_THRESHOLD_EVENT,
/* keep last */
__NL80211_ATTR_CQM_AFTER_LAST,
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index 2a7936d..e7f044e 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -1146,6 +1146,7 @@ struct cfg80211_pmksa {
* @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_bitrate_config: Config connection quality monitor bitrate threshold.
*
* @mgmt_frame_register: Notify driver that a management frame type was
* registered. Note that this callback may not sleep, and cannot run
@@ -1301,6 +1302,10 @@ struct cfg80211_ops {
struct net_device *dev,
s32 rssi_thold, u32 rssi_hyst);
+ int (*set_cqm_bitrate_config)(struct wiphy *wiphy,
+ struct net_device *dev,
+ u32 bitrate_thold);
+
void (*mgmt_frame_register)(struct wiphy *wiphy,
struct net_device *dev,
u16 frame_type, bool reg);
@@ -2595,6 +2600,19 @@ void cfg80211_cqm_rssi_notify(struct net_device *dev,
enum nl80211_cqm_rssi_threshold_event rssi_event,
gfp_t gfp);
+/**
+ * cfg80211_cqm_bitrate_notify - connection quality monitoring bitrate event
+ * @dev: network device
+ * @rate: the new transmit rate
+ * @gfp: context flags
+ *
+ * This function is called when a the transmit bitrate changes, and
+ * connection quality monitoring is configured to capture these events.
+ */
+void cfg80211_cqm_bitrate_notify(struct net_device *dev,
+ u32 bitrate,
+ gfp_t gfp);
+
/* Logging, debugging and troubleshooting/diagnostic helpers. */
/* wiphy_printk helpers, similar to dev_printk */
diff --git a/net/wireless/mlme.c b/net/wireless/mlme.c
index 26838d9..ebb4e3a 100644
--- a/net/wireless/mlme.c
+++ b/net/wireless/mlme.c
@@ -1028,3 +1028,16 @@ void cfg80211_cqm_rssi_notify(struct net_device *dev,
nl80211_send_cqm_rssi_notify(rdev, dev, rssi_event, gfp);
}
EXPORT_SYMBOL(cfg80211_cqm_rssi_notify);
+
+void cfg80211_cqm_bitrate_notify(struct net_device *dev,
+ u32 bitrate,
+ gfp_t gfp)
+{
+ struct wireless_dev *wdev = dev->ieee80211_ptr;
+ struct wiphy *wiphy = wdev->wiphy;
+ struct cfg80211_registered_device *rdev = wiphy_to_dev(wiphy);
+
+ /* Indicate roaming trigger event to user space */
+ nl80211_send_cqm_bitrate_notify(rdev, dev, bitrate, gfp);
+}
+EXPORT_SYMBOL(cfg80211_cqm_bitrate_notify);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index c506241..de5f0b6 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -4325,6 +4325,8 @@ 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_BITRATE_THOLD] = { .type = NLA_U32 },
+ [NL80211_ATTR_CQM_BITRATE_THRESHOLD_EVENT] = { .type = NLA_U32 },
};
static int nl80211_set_cqm_rssi(struct genl_info *info,
@@ -4350,6 +4352,26 @@ static int nl80211_set_cqm_rssi(struct genl_info *info,
threshold, hysteresis);
}
+static int nl80211_set_cqm_bitrate(struct genl_info *info,
+ u32 trigger_rate)
+{
+ struct cfg80211_registered_device *rdev = info->user_ptr[0];
+ struct wireless_dev *wdev;
+ struct net_device *dev = info->user_ptr[1];
+
+ wdev = dev->ieee80211_ptr;
+
+ if (!rdev->ops->set_cqm_bitrate_config)
+ return -EOPNOTSUPP;
+
+ if (wdev->iftype != NL80211_IFTYPE_STATION &&
+ wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
+ return -EOPNOTSUPP;
+
+ return rdev->ops->set_cqm_bitrate_config(wdev->wiphy, dev,
+ trigger_rate);
+}
+
static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
{
struct nlattr *attrs[NL80211_ATTR_CQM_MAX + 1];
@@ -4367,6 +4389,8 @@ static int nl80211_set_cqm(struct sk_buff *skb, struct genl_info *info)
if (err)
goto out;
+ err = -EINVAL;
+
if (attrs[NL80211_ATTR_CQM_RSSI_THOLD] &&
attrs[NL80211_ATTR_CQM_RSSI_HYST]) {
s32 threshold;
@@ -4374,8 +4398,16 @@ 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
- err = -EINVAL;
+ if (err)
+ goto out;
+ }
+
+ if (attrs[NL80211_ATTR_CQM_BITRATE_THOLD]) {
+ u32 thold = nla_get_u32(attrs[NL80211_ATTR_CQM_BITRATE_THOLD]);
+ err = nl80211_set_cqm_bitrate(info, thold);
+ if (err)
+ goto out;
+ }
out:
return err;
@@ -5651,6 +5683,56 @@ nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
nlmsg_free(msg);
}
+void
+nl80211_send_cqm_bitrate_notify(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev,
+ u32 bitrate,
+ gfp_t gfp)
+{
+ struct sk_buff *msg;
+ struct nlattr *pinfoattr;
+ void *hdr;
+
+ if (bitrate == 0)
+ return;
+
+
+ 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;
+ }
+
+
+ NLA_PUT_U32(msg, NL80211_ATTR_WIPHY, rdev->wiphy_idx);
+ NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, netdev->ifindex);
+
+ pinfoattr = nla_nest_start(msg, NL80211_ATTR_CQM);
+ if (!pinfoattr)
+ goto nla_put_failure;
+
+ NLA_PUT_U32(msg, NL80211_ATTR_CQM_BITRATE_THRESHOLD_EVENT, bitrate);
+
+ nla_nest_end(msg, pinfoattr);
+
+ if (genlmsg_end(msg, hdr) < 0) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ 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);
+}
+
static int nl80211_netlink_notify(struct notifier_block * nb,
unsigned long state,
void *_notify)
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 30d2f93..769fa90 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -88,4 +88,10 @@ nl80211_send_cqm_rssi_notify(struct cfg80211_registered_device *rdev,
enum nl80211_cqm_rssi_threshold_event rssi_event,
gfp_t gfp);
+void
+nl80211_send_cqm_bitrate_notify(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev,
+ u32 bitrate,
+ gfp_t gfp);
+
#endif /* __NET_WIRELESS_NL80211_H */
--
1.7.1
--
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