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authorJohannes Berg <johannes@sipsolutions.net>2010-05-01 18:53:51 +0200
committerJohn W. Linville <linville@tuxdriver.com>2010-05-03 14:53:10 -0400
commita75b4363eaafa99d909da4f1192322a78b074c73 (patch)
tree3eb89854769c07e1607549904dc490cddb622be2
parent07cefe7ac983374ee4c369f1d4aee3093bf3b44f (diff)
downloadblackbird-op-linux-a75b4363eaafa99d909da4f1192322a78b074c73.tar.gz
blackbird-op-linux-a75b4363eaafa99d909da4f1192322a78b074c73.zip
mac80211: allow controlling aggregation manually
This allows enabling TX and disabling both TX and RX aggregation sessions manually in debugfs. It is very useful for debugging session initiation and teardown problems since with this you don't have to force a lot of traffic to get aggregation and thus have less data to analyse. Also, to debug mac80211 code itself, make hwsim "support" aggregation sessions. It will still just transfer the frame, but go through the setup and teardown handshakes. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: John W. Linville <linville@tuxdriver.com>
-rw-r--r--drivers/net/wireless/mac80211_hwsim.c3
-rw-r--r--net/mac80211/debugfs_sta.c65
2 files changed, 66 insertions, 2 deletions
diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index d016933d7573..ebcf43904291 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -1299,7 +1299,8 @@ static int __init init_mac80211_hwsim(void)
hw->flags = IEEE80211_HW_MFP_CAPABLE |
IEEE80211_HW_SIGNAL_DBM |
IEEE80211_HW_SUPPORTS_STATIC_SMPS |
- IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS;
+ IEEE80211_HW_SUPPORTS_DYNAMIC_SMPS |
+ IEEE80211_HW_AMPDU_AGGREGATION;
/* ask mac80211 to reserve space for magic */
hw->vif_data_size = sizeof(struct hwsim_vif_priv);
diff --git a/net/mac80211/debugfs_sta.c b/net/mac80211/debugfs_sta.c
index 6bc9b07c3eda..e763f1529ddb 100644
--- a/net/mac80211/debugfs_sta.c
+++ b/net/mac80211/debugfs_sta.c
@@ -39,6 +39,13 @@ static const struct file_operations sta_ ##name## _ops = { \
.open = mac80211_open_file_generic, \
}
+#define STA_OPS_RW(name) \
+static const struct file_operations sta_ ##name## _ops = { \
+ .read = sta_##name##_read, \
+ .write = sta_##name##_write, \
+ .open = mac80211_open_file_generic, \
+}
+
#define STA_FILE(name, field, format) \
STA_READ_##format(name, field) \
STA_OPS(name)
@@ -156,7 +163,63 @@ static ssize_t sta_agg_status_read(struct file *file, char __user *userbuf,
return simple_read_from_buffer(userbuf, count, ppos, buf, p - buf);
}
-STA_OPS(agg_status);
+
+static ssize_t sta_agg_status_write(struct file *file, const char __user *userbuf,
+ size_t count, loff_t *ppos)
+{
+ char _buf[12], *buf = _buf;
+ struct sta_info *sta = file->private_data;
+ bool start, tx;
+ unsigned long tid;
+ int ret;
+
+ if (count > sizeof(_buf))
+ return -EINVAL;
+
+ if (copy_from_user(buf, userbuf, count))
+ return -EFAULT;
+
+ buf[sizeof(_buf) - 1] = '\0';
+
+ if (strncmp(buf, "tx ", 3) == 0) {
+ buf += 3;
+ tx = true;
+ } else if (strncmp(buf, "rx ", 3) == 0) {
+ buf += 3;
+ tx = false;
+ } else
+ return -EINVAL;
+
+ if (strncmp(buf, "start ", 6) == 0) {
+ buf += 6;
+ start = true;
+ if (!tx)
+ return -EINVAL;
+ } else if (strncmp(buf, "stop ", 5) == 0) {
+ buf += 5;
+ start = false;
+ } else
+ return -EINVAL;
+
+ tid = simple_strtoul(buf, NULL, 0);
+
+ if (tid >= STA_TID_NUM)
+ return -EINVAL;
+
+ if (tx) {
+ if (start)
+ ret = ieee80211_start_tx_ba_session(&sta->sta, tid);
+ else
+ ret = ieee80211_stop_tx_ba_session(&sta->sta, tid,
+ WLAN_BACK_RECIPIENT);
+ } else {
+ __ieee80211_stop_rx_ba_session(sta, tid, WLAN_BACK_RECIPIENT, 3);
+ ret = 0;
+ }
+
+ return ret ?: count;
+}
+STA_OPS_RW(agg_status);
static ssize_t sta_ht_capa_read(struct file *file, char __user *userbuf,
size_t count, loff_t *ppos)
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