From 6cc530cefe97eb22b079c54ecff575a62d87882b Mon Sep 17 00:00:00 2001
From: Daniel Ehlers <danielehlers@mindeye.net>
Date: Fri, 4 Jul 2014 00:15:41 +0200
Subject: [PATCH 1/2] gluon-ath9k-workaround: Workaround for the ath9k wifi
 bug.

Cron script which restarts wifi iff queues are marked stopped.
This script also outputs some debug information to nail
down the problem.
---
 gluon/gluon-ath9k-workaround/Makefile         | 35 +++++++++++
 .../files/lib/gluon/cron/ath9k-workaround     |  1 +
 .../files/usr/sbin/ath9k-workaround           | 61 +++++++++++++++++++
 3 files changed, 97 insertions(+)
 create mode 100644 gluon/gluon-ath9k-workaround/Makefile
 create mode 100644 gluon/gluon-ath9k-workaround/files/lib/gluon/cron/ath9k-workaround
 create mode 100755 gluon/gluon-ath9k-workaround/files/usr/sbin/ath9k-workaround

diff --git a/gluon/gluon-ath9k-workaround/Makefile b/gluon/gluon-ath9k-workaround/Makefile
new file mode 100644
index 0000000..bc809df
--- /dev/null
+++ b/gluon/gluon-ath9k-workaround/Makefile
@@ -0,0 +1,35 @@
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=gluon-ath9k-workaround
+PKG_VERSION:=1
+PKG_RELEASE:=1
+
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/gluon-ath9k-workaround
+  SECTION:=gluon
+  CATEGORY:=Gluon
+  TITLE:=ATH9K Workaround
+  DEPENDS:=+gluon-cron
+endef
+
+define Package/gluon-ath9k-workaround/description
+	Gluon community wifi mesh firmware framework: ath9k wifi bug workaround
+endef
+
+define Build/Prepare
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+endef
+
+define Package/gluon-ath9k-workaround/install
+	$(CP) ./files/* $(1)/
+endef
+
+$(eval $(call BuildPackage,gluon-ath9k-workaround))
diff --git a/gluon/gluon-ath9k-workaround/files/lib/gluon/cron/ath9k-workaround b/gluon/gluon-ath9k-workaround/files/lib/gluon/cron/ath9k-workaround
new file mode 100644
index 0000000..73552f9
--- /dev/null
+++ b/gluon/gluon-ath9k-workaround/files/lib/gluon/cron/ath9k-workaround
@@ -0,0 +1 @@
+* * * * * /usr/sbin/ath9k-workaround
diff --git a/gluon/gluon-ath9k-workaround/files/usr/sbin/ath9k-workaround b/gluon/gluon-ath9k-workaround/files/usr/sbin/ath9k-workaround
new file mode 100755
index 0000000..fccd218
--- /dev/null
+++ b/gluon/gluon-ath9k-workaround/files/usr/sbin/ath9k-workaround
@@ -0,0 +1,61 @@
+#!/bin/sh
+
+check_stopped_queue(){
+  local device=$1
+  grep -q -E 'stopped: 1$' "${device}/queues"
+}
+
+get_tx_pkts() {
+  local device=$1
+  grep 'TX-Pkts-All' "${device}/xmit" \
+    | sed -e 's/^TX-Pkts-All: *\([0-9]*\) .*$/\1/'
+}
+
+inc_fatal() {
+  local qs=$(cat /tmp/ath9k_workaround_trigger 2>/dev/null || echo 0)
+  expr ${qs} + 1 > /tmp/ath9k_workaround_trigger
+}
+
+check_ath9k_bug() {
+  local device=$1
+  check_stopped_queue $device && {
+    local tx_first=$(get_tx_pkts $device)
+    sleep 5
+    check_stopped_queue $device && {
+      local tx_second=$(get_tx_pkts $device)
+      test $tx_first == $tx_second && {
+        local hostname=$(uci get -q system.@system[0].hostname)
+        echo "Hostname: ${hostname}"
+        echo "------------ Trigger workaround: ${tx_first} -> ${tx_second} ----------------"
+        echo "Model:" 
+        cat /tmp/sysinfo/model
+        echo "Release:"
+        cat /lib/gluon/release
+        echo "Uptime:"
+        uptime
+        echo "Batctl Neighbours:"
+        batctl o | grep wlan0-1
+        echo "Queues:"
+        cat $device/queues
+        echo "Reset:"
+        cat $device/reset
+        echo "------------ Interupts #1 ---------------------------------------------------"
+        cat $device/interrupt
+        sleep 10
+        echo "------------ Interupts #2 ---------------------------------------------------"
+        cat $device/interrupt
+        echo "Batctl Neighbours:"
+        batctl o | grep wlan0-1
+
+        #BE queue hangs
+        inc_fatal
+        wifi
+        exit 1;
+      }
+    }
+  }
+}
+
+for device in /sys/kernel/debug/ieee80211/phy*/ath9k ; do
+  check_ath9k_bug $device
+done

From 91b43d0df48d835cb4cdf782d3023022a8c9f0f7 Mon Sep 17 00:00:00 2001
From: Daniel Ehlers <danielehlers@mindeye.net>
Date: Mon, 7 Jul 2014 01:36:31 +0200
Subject: [PATCH 2/2] gluon-ath9k-workaround: bug reporting support

If the `monitor` attribute in the site.conf is defined, the cron
script is modifed to send debug informations, generated on bug
detection, to given remote host and port,
e.g.: "fda1:384a:74de:4242::2 8090"
---
 .../upgrade/ath9k-workaround/invariant/010-monitor   | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100755 gluon/gluon-ath9k-workaround/files/lib/gluon/upgrade/ath9k-workaround/invariant/010-monitor

diff --git a/gluon/gluon-ath9k-workaround/files/lib/gluon/upgrade/ath9k-workaround/invariant/010-monitor b/gluon/gluon-ath9k-workaround/files/lib/gluon/upgrade/ath9k-workaround/invariant/010-monitor
new file mode 100755
index 0000000..ac69624
--- /dev/null
+++ b/gluon/gluon-ath9k-workaround/files/lib/gluon/upgrade/ath9k-workaround/invariant/010-monitor
@@ -0,0 +1,12 @@
+#!/usr/bin/lua
+
+local site = require 'gluon.site_config'
+local uci = require 'luci.model.uci'
+
+local c = uci.cursor()
+
+local f = io.open('/lib/gluon/cron/ath9k-workaround','w')
+if f and site.monitor ~= nil then
+  f:write('* * * * * /usr/sbin/ath9k-workaround | nc ' .. site.monitor)
+  f:close()
+end