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authorJohannes Berg <johannes@sipsolutions.net>2009-05-12 22:05:40 +0200
committerJohn W. Linville <linville@tuxdriver.com>2009-05-13 15:44:53 -0400
commitd3707d9918d47c0997a6b1e4ae24e7ab55e43796 (patch)
treedd05505563ae8b02bfd1a5db5d5bdde6e6750798
parentb59066a291ca7c12a1e5b58f3ada5ab6e32cb6bd (diff)
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>
-rw-r--r--net/mac80211/debugfs.c38
-rw-r--r--net/mac80211/ieee80211_i.h1
-rw-r--r--net/mac80211/tx.c5
-rw-r--r--net/mac80211/wme.c2
4 files changed, 44 insertions, 2 deletions
diff --git a/net/mac80211/debugfs.c b/net/mac80211/debugfs.c
index ac793201b70..e7682fe1c59 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);
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 56a49ef446c..9d1514727f6 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -766,6 +766,7 @@ struct ieee80211_local {
struct dentry *wep_iv;
struct dentry *tsf;
struct dentry *reset;
+ struct dentry *noack;
struct dentry *statistics;
struct local_debugfsdentries_statsdentries {
struct dentry *transmitted_fragment_count;
diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c
index 5f9a8d7af83..8f68bf9746d 100644
--- a/net/mac80211/tx.c
+++ b/net/mac80211/tx.c
@@ -1087,7 +1087,10 @@ __ieee80211_tx_prepare(struct ieee80211_tx_data *tx,
info->flags |= IEEE80211_TX_CTL_NO_ACK;
} else {
tx->flags |= IEEE80211_TX_UNICAST;
- info->flags &= ~IEEE80211_TX_CTL_NO_ACK;
+ if (unlikely(local->wifi_wme_noack_test))
+ info->flags |= IEEE80211_TX_CTL_NO_ACK;
+ else
+ info->flags &= ~IEEE80211_TX_CTL_NO_ACK;
}
if (tx->flags & IEEE80211_TX_FRAGMENTED) {
diff --git a/net/mac80211/wme.c b/net/mac80211/wme.c
index 0b8ad1f4ecd..45b74f38b86 100644
--- a/net/mac80211/wme.c
+++ b/net/mac80211/wme.c
@@ -133,7 +133,7 @@ u16 ieee80211_select_queue(struct net_device *dev, struct sk_buff *skb)
u8 *p = ieee80211_get_qos_ctl(hdr);
u8 ack_policy = 0;
tid = skb->priority & IEEE80211_QOS_CTL_TAG1D_MASK;
- if (local->wifi_wme_noack_test)
+ if (unlikely(local->wifi_wme_noack_test))
ack_policy |= QOS_CONTROL_ACK_POLICY_NOACK <<
QOS_CONTROL_ACK_POLICY_SHIFT;
/* qos header is 2 bytes, second reserved */