The driver can indicate gscan results are available or gscan operation
has stopped.
Reviewed-by: Hante Meuleman <hante.meuleman@xxxxxxxxxxxx>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@xxxxxxxxxxxx>
Reviewed-by: Franky Lin <franky.lin@xxxxxxxxxxxx>
Signed-off-by: Arend van Spriel <arend.vanspriel@xxxxxxxxxxxx>
---
include/net/cfg80211.h | 28 ++++++++++++++++++++
include/uapi/linux/nl80211.h | 2 ++
net/wireless/core.c | 2 ++
net/wireless/core.h | 2 ++
net/wireless/nl80211.c | 19 ++++++++++++++
net/wireless/nl80211.h | 2 ++
net/wireless/scan.c | 61 ++++++++++++++++++++++++++++++++++++++++++++
net/wireless/trace.h | 10 ++++++++
8 files changed, 126 insertions(+)
diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h
index b4b0536..d85a439 100644
--- a/include/net/cfg80211.h
+++ b/include/net/cfg80211.h
@@ -4570,6 +4570,34 @@ void cfg80211_scan_done(struct cfg80211_scan_request *request,
void cfg80211_sched_scan_stopped_rtnl(struct wiphy *wiphy);
/**
+ * cfg80211_gscan_results - notify that new scan results are available
+ *
+ * @wiphy: the wiphy which got GScan results
+ */
+void cfg80211_gscan_results(struct wiphy *wiphy);
+
+/**
+ * cfg80211_gscan_stopped - notify that the GScan has stopped
+ *
+ * @wiphy: the wiphy on which the GScan stopped.
+ *
+ * The driver can call this function to inform cfg80211 that the
+ * GScan had to be stopped, for whatever reason.
+ */
+void cfg80211_gscan_stopped(struct wiphy *wiphy);
+
+/**
+ * cfg80211_gscan_stopped_rtnl - notify that the GScan has stopped
+ *
+ * @wiphy: the wiphy on which the GScan stopped.
+ *
+ * The driver can call this function to inform cfg80211 that the
+ * GScan had to be stopped, for whatever reason.
+ * This function should be called with rtnl locked.
+ */
+void cfg80211_gscan_stopped_rtnl(struct wiphy *wiphy);
+
+/**
* cfg80211_inform_bss_frame_data - inform cfg80211 of a received BSS frame
* @wiphy: the wiphy reporting the BSS
* @data: the BSS metadata
diff --git a/include/uapi/linux/nl80211.h b/include/uapi/linux/nl80211.h
index 8071dae..c4c9005 100644
--- a/include/uapi/linux/nl80211.h
+++ b/include/uapi/linux/nl80211.h
@@ -896,6 +896,7 @@
*
* @NL80211_CMD_START_GSCAN: start GScan.
* @NL80211_CMD_STOP_GSCAN: request to stop current GScan.
+ * @NL80211_CMD_GSCAN_RESULTS: indicates that there GScan results available.
* @NL80211_CMD_GSCAN_STOPPED: indicates that the currently running GScan
* has stopped. This event is generated upon @NL80211_CMD_STOP_GSCAN and
* the driver may issue this event at any time when a GScan is running.
@@ -1101,6 +1102,7 @@ enum nl80211_commands {
NL80211_CMD_START_GSCAN,
NL80211_CMD_STOP_GSCAN,
+ NL80211_CMD_GSCAN_RESULTS,
NL80211_CMD_GSCAN_STOPPED,
/* add new commands above here */
diff --git a/net/wireless/core.c b/net/wireless/core.c
index 760a2fb..69eea4c 100644
--- a/net/wireless/core.c
+++ b/net/wireless/core.c
@@ -453,6 +453,7 @@ struct wiphy *wiphy_new_nm(const struct cfg80211_ops *ops, int sizeof_priv,
INIT_LIST_HEAD(&rdev->bss_list);
INIT_WORK(&rdev->scan_done_wk, __cfg80211_scan_done);
INIT_WORK(&rdev->sched_scan_results_wk, __cfg80211_sched_scan_results);
+ INIT_WORK(&rdev->gscan_results_wk, __cfg80211_gscan_results);
INIT_LIST_HEAD(&rdev->mlme_unreg);
spin_lock_init(&rdev->mlme_unreg_lock);
INIT_WORK(&rdev->mlme_unreg_wk, cfg80211_mlme_unreg_wk);
@@ -935,6 +936,7 @@ void wiphy_unregister(struct wiphy *wiphy)
cancel_delayed_work_sync(&rdev->dfs_update_channels_wk);
flush_work(&rdev->destroy_work);
flush_work(&rdev->sched_scan_stop_wk);
+ flush_work(&rdev->gscan_stop_wk);
flush_work(&rdev->mlme_unreg_wk);
#ifdef CONFIG_PM
diff --git a/net/wireless/core.h b/net/wireless/core.h
index b0f2519..1d56ef4 100644
--- a/net/wireless/core.h
+++ b/net/wireless/core.h
@@ -78,6 +78,7 @@ struct cfg80211_registered_device {
unsigned long suspend_at;
struct work_struct scan_done_wk;
struct work_struct sched_scan_results_wk;
+ struct work_struct gscan_results_wk;
struct genl_info *cur_cmd_info;
@@ -423,6 +424,7 @@ void ___cfg80211_scan_done(struct cfg80211_registered_device *rdev,
void __cfg80211_sched_scan_results(struct work_struct *wk);
int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
bool driver_initiated);
+void __cfg80211_gscan_results(struct work_struct *wk);
int __cfg80211_stop_gscan(struct cfg80211_registered_device *rdev,
bool driver_initiated);
void cfg80211_upload_connect_keys(struct wireless_dev *wdev);
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 5b22310..f0099ee 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -13304,6 +13304,25 @@ void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
NL80211_MCGRP_SCAN, GFP_KERNEL);
}
+void nl80211_send_gscan_results(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev)
+{
+ struct sk_buff *msg;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ if (nl80211_send_scan_event_msg(msg, rdev, netdev, 0, 0, 0,
+ NL80211_CMD_GSCAN_RESULTS) < 0) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast_netns(&nl80211_fam, wiphy_net(&rdev->wiphy), msg, 0,
+ NL80211_MCGRP_SCAN, GFP_KERNEL);
+}
+
void nl80211_send_scan_event(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u32 cmd)
{
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index fb304ce9..4eec856 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -20,6 +20,8 @@ void nl80211_send_scan_event(struct cfg80211_registered_device *rdev,
struct net_device *netdev, u32 cmd);
void nl80211_send_sched_scan_results(struct cfg80211_registered_device *rdev,
struct net_device *netdev);
+void nl80211_send_gscan_results(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev);
void nl80211_common_reg_change_event(enum nl80211_commands cmd_id,
struct regulatory_request *request);
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index 327b23c..f34d5d4 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -287,6 +287,47 @@ void cfg80211_sched_scan_results(struct wiphy *wiphy)
}
EXPORT_SYMBOL(cfg80211_sched_scan_results);
+void __cfg80211_gscan_results(struct work_struct *wk)
+{
+ struct cfg80211_registered_device *rdev;
+ struct cfg80211_gscan_request *request;
+
+ rdev = container_of(wk, struct cfg80211_registered_device,
+ gscan_results_wk);
+
+ rtnl_lock();
+
+ request = rtnl_dereference(rdev->gscan_req);
+
+ /* we don't have sched_scan_req anymore if the scan is stopping */
+ if (request) {
+#if 0
+ /* TODO: how to deal with flush */
+ if (request->flags & NL80211_SCAN_FLAG_FLUSH) {
+ /* flush entries from previous scans */
+ spin_lock_bh(&rdev->bss_lock);
+ __cfg80211_bss_expire(rdev, request->scan_start);
+ spin_unlock_bh(&rdev->bss_lock);
+ request->scan_start = jiffies;
+ }
+#endif
+ nl80211_send_gscan_results(rdev, request->dev);
+ }
+
+ rtnl_unlock();
+}
+
+void cfg80211_gscan_results(struct wiphy *wiphy)
+{
+ trace_cfg80211_gscan_results(wiphy);
+ /* ignore if we're not scanning */
+
+ if (rcu_access_pointer(wiphy_to_rdev(wiphy)->gscan_req))
+ queue_work(cfg80211_wq,
+ &wiphy_to_rdev(wiphy)->gscan_results_wk);
+}
+EXPORT_SYMBOL(cfg80211_gscan_results);
+
void cfg80211_sched_scan_stopped_rtnl(struct wiphy *wiphy)
{
struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
@@ -307,6 +348,26 @@ void cfg80211_sched_scan_stopped(struct wiphy *wiphy)
}
EXPORT_SYMBOL(cfg80211_sched_scan_stopped);
+void cfg80211_gscan_stopped_rtnl(struct wiphy *wiphy)
+{
+ struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
+
+ ASSERT_RTNL();
+
+ trace_cfg80211_gscan_stopped(wiphy);
+
+ __cfg80211_stop_gscan(rdev, true);
+}
+EXPORT_SYMBOL(cfg80211_gscan_stopped_rtnl);
+
+void cfg80211_gscan_stopped(struct wiphy *wiphy)
+{
+ rtnl_lock();
+ cfg80211_gscan_stopped_rtnl(wiphy);
+ rtnl_unlock();
+}
+EXPORT_SYMBOL(cfg80211_gscan_stopped);
+
int __cfg80211_stop_sched_scan(struct cfg80211_registered_device *rdev,
bool driver_initiated)
{
diff --git a/net/wireless/trace.h b/net/wireless/trace.h
index 1d0fde9..f3f5d82 100644
--- a/net/wireless/trace.h
+++ b/net/wireless/trace.h
@@ -2799,6 +2799,16 @@
TP_ARGS(wiphy)
);
+DEFINE_EVENT(wiphy_only_evt, cfg80211_gscan_results,
+ TP_PROTO(struct wiphy *wiphy),
+ TP_ARGS(wiphy)
+);
+
+DEFINE_EVENT(wiphy_only_evt, cfg80211_gscan_stopped,
+ TP_PROTO(struct wiphy *wiphy),
+ TP_ARGS(wiphy)
+);
+
TRACE_EVENT(cfg80211_get_bss,
TP_PROTO(struct wiphy *wiphy, struct ieee80211_channel *channel,
const u8 *bssid, const u8 *ssid, size_t ssid_len,
--
1.9.1
