mac80211: Added a new debugfs file for reading channel_type

This file helps debugging HT channels since it displays if we are on
ht20 or ht40+/ht40-

Signed-off-by: Benoit Papillault <benoit.papillault@free.fr>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index b3bc32b62a5a66002ad289a18a22dbb7a455d6a2..637929b65ccc1f18b1bc0ad4dc7338170955c4fe 100644 (file)
--- a/net/mac80211/debugfs.c
+++ b/net/mac80211/debugfs.c
@@ -250,6 +250,38 @@ static const struct file_operations uapsd_max_sp_len_ops = {
        .open = mac80211_open_file_generic
 };
 
+static ssize_t channel_type_read(struct file *file, char __user *user_buf,
+                      size_t count, loff_t *ppos)
+{
+       struct ieee80211_local *local = file->private_data;
+       const char *buf;
+
+       switch (local->hw.conf.channel_type) {
+       case NL80211_CHAN_NO_HT:
+               buf = "no ht\n";
+               break;
+       case NL80211_CHAN_HT20:
+               buf = "ht20\n";
+               break;
+       case NL80211_CHAN_HT40MINUS:
+               buf = "ht40-\n";
+               break;
+       case NL80211_CHAN_HT40PLUS:
+               buf = "ht40+\n";
+               break;
+       default:
+               buf = "???";
+               break;
+       }
+
+       return simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));
+}
+
+static const struct file_operations channel_type_ops = {
+       .read = channel_type_read,
+       .open = mac80211_open_file_generic
+};
+
 static ssize_t queues_read(struct file *file, char __user *user_buf,
                           size_t count, loff_t *ppos)
 {
@@ -408,6 +440,7 @@ void debugfs_hw_add(struct ieee80211_local *local)
        DEBUGFS_ADD(noack);
        DEBUGFS_ADD(uapsd_queues);
        DEBUGFS_ADD(uapsd_max_sp_len);
+       DEBUGFS_ADD(channel_type);
 
        statsd = debugfs_create_dir("statistics", phyd);