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>

1 files changed, 33 insertions, 0 deletions

diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index b3bc32b62a5a..637929b65ccc 100644
--- 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);