cfg80211: issue netlink notification when scan starts
To ease multiple apps working together smoothly,
send a notification when a scan is started.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index f91e5d4..5a6c4ca 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2839,6 +2839,9 @@
drv->scan_req = request;
err = drv->ops->scan(&drv->wiphy, dev, request);
+ if (!err)
+ nl80211_send_scan_start(drv, dev);
+
out_free:
if (err) {
drv->scan_req = NULL;
@@ -3665,11 +3668,11 @@
return -ENOBUFS;
}
-static int nl80211_send_scan_donemsg(struct sk_buff *msg,
- struct cfg80211_registered_device *rdev,
- struct net_device *netdev,
- u32 pid, u32 seq, int flags,
- u32 cmd)
+static int nl80211_send_scan_msg(struct sk_buff *msg,
+ struct cfg80211_registered_device *rdev,
+ struct net_device *netdev,
+ u32 pid, u32 seq, int flags,
+ u32 cmd)
{
void *hdr;
@@ -3690,6 +3693,24 @@
return -EMSGSIZE;
}
+void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev)
+{
+ struct sk_buff *msg;
+
+ msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL);
+ if (!msg)
+ return;
+
+ if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
+ NL80211_CMD_TRIGGER_SCAN) < 0) {
+ nlmsg_free(msg);
+ return;
+ }
+
+ genlmsg_multicast(msg, 0, nl80211_scan_mcgrp.id, GFP_KERNEL);
+}
+
void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
struct net_device *netdev)
{
@@ -3699,8 +3720,8 @@
if (!msg)
return;
- if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
- NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
+ if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
+ NL80211_CMD_NEW_SCAN_RESULTS) < 0) {
nlmsg_free(msg);
return;
}
@@ -3717,8 +3738,8 @@
if (!msg)
return;
- if (nl80211_send_scan_donemsg(msg, rdev, netdev, 0, 0, 0,
- NL80211_CMD_SCAN_ABORTED) < 0) {
+ if (nl80211_send_scan_msg(msg, rdev, netdev, 0, 0, 0,
+ NL80211_CMD_SCAN_ABORTED) < 0) {
nlmsg_free(msg);
return;
}