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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>
This commit is contained in:
Johannes Berg 2009-05-12 22:05:40 +02:00 committed by John W. Linville
parent b59066a291
commit d3707d9918
4 changed files with 44 additions and 2 deletions
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38
net/mac80211/debugfs.c
View File

@ -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);

1
net/mac80211/ieee80211_i.h
View File

@ -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;

5
net/mac80211/tx.c
View File

@ -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) {

2
net/mac80211/wme.c
View File

@ -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 */