mac80211: make noack test available

There's this internal wifi_wme_noack_test variable that
we use to set the QoS control if set. For one, it is
unlikely that it is set. Secondly, if set it needs to
influence the IEEE80211_TX_CTL_NO_ACK TX control flag,
and finally we should also be able to set it at all, so
make it available in debugfs.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index ac793201b701..e7682fe1c590 100644
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -135,6 +135,42 @@ static const struct file_operations reset_ops = {
         .open = mac80211_open_file_generic,
 };
 
+static ssize_t noack_read(struct file *file, char __user *user_buf,
+                          size_t count, loff_t *ppos)
+{
+        struct ieee80211_local *local = file->private_data;
+        int res;
+        char buf[10];
+
+        res = scnprintf(buf, sizeof(buf), "%d\n", local->wifi_wme_noack_test);
+
+        return simple_read_from_buffer(user_buf, count, ppos, buf, res);
+}
+
+static ssize_t noack_write(struct file *file,
+                           const char __user *user_buf,
+                           size_t count, loff_t *ppos)
+{
+        struct ieee80211_local *local = file->private_data;
+        char buf[10];
+        size_t len;
+
+        len = min(count, sizeof(buf) - 1);
+        if (copy_from_user(buf, user_buf, len))
+                return -EFAULT;
+        buf[len] = '\0';
+
+        local->wifi_wme_noack_test = !!simple_strtoul(buf, NULL, 0);
+
+        return count;
+}
+
+static const struct file_operations noack_ops = {
+        .read = noack_read,
+        .write = noack_write,
+        .open = mac80211_open_file_generic
+};
+
 /* statistics stuff */
 
 #define DEBUGFS_STATS_FILE(name, buflen, fmt, value...)                 \
@@ -275,6 +311,7 @@ void debugfs_hw_add(struct ieee80211_local *local)
         DEBUGFS_ADD(wep_iv);
         DEBUGFS_ADD(tsf);
         DEBUGFS_ADD_MODE(reset, 0200);
+        DEBUGFS_ADD(noack);
 
         statsd = debugfs_create_dir("statistics", phyd);
         local->debugfs.statistics = statsd;
@@ -330,6 +367,7 @@ void debugfs_hw_del(struct ieee80211_local *local)
         DEBUGFS_DEL(wep_iv);
         DEBUGFS_DEL(tsf);
         DEBUGFS_DEL(reset);
+        DEBUGFS_DEL(noack);
 
         DEBUGFS_STATS_DEL(transmitted_fragment_count);
         DEBUGFS_STATS_DEL(multicast_transmitted_frame_count);