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authorJohannes Berg <johannes@sipsolutions.net>2009-06-16 19:56:42 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-07-10 14:57:53 -0400
commita538e2d5a30f577e9c8f6ccfe72b29a258e0fe86 (patch)
tree56bc91e64d25fc4fdc1f00f01e0afa8be519e252
parent222ec50a0a5d20e75522aacf4c767df6585e8548 (diff)
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>
-rw-r--r--net/wireless/nl80211.c39
-rw-r--r--net/wireless/nl80211.h2
-rw-r--r--net/wireless/scan.c3
3 files changed, 34 insertions, 10 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index f91e5d472c6..5a6c4ca5939 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -2839,6 +2839,9 @@ static int nl80211_trigger_scan(struct sk_buff *skb, struct genl_info *info)
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 @@ static int nl80211_add_scan_req(struct sk_buff *msg,
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 @@ static int nl80211_send_scan_donemsg(struct sk_buff *msg,
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 @@ void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
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 @@ void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
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;
}
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 5c12ad13499..a3872a40cfa 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -6,6 +6,8 @@
extern int nl80211_init(void);
extern void nl80211_exit(void);
extern void nl80211_notify_dev_rename(struct cfg80211_registered_device *rdev);
+extern void nl80211_send_scan_start(struct cfg80211_registered_device *rdev,
+ struct net_device *netdev);
extern void nl80211_send_scan_done(struct cfg80211_registered_device *rdev,
struct net_device *netdev);
extern void nl80211_send_scan_aborted(struct cfg80211_registered_device *rdev,
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index f8e71b30000..261a0638682 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -647,7 +647,8 @@ int cfg80211_wext_siwscan(struct net_device *dev,
if (err) {
rdev->scan_req = NULL;
kfree(creq);
- }
+ } else
+ nl80211_send_scan_start(rdev, dev);
out:
cfg80211_put_dev(rdev);
return err;