From 74e3c57fe0a3a88aedec6b51f8eab007b8894f82 Mon Sep 17 00:00:00 2001
From: Sebastian Moeller <moeller0@gmx.de>
Date: Fri, 20 Mar 2015 22:47:45 +0100
Subject: [PATCH] sqm-scripts: clean up interface selection for hotplugging

The initial conversion to restart sqm on interfaces it is configured
for in case of (transient) dis- and reappearance was half finished.
These changes clean up the handling of exlicitly passed interfaces
in run.sh: no second argument defaults to all configured interfaces
the alternative is an individual interface name passed as 2nd
argument to run.sh. The first argument either is start or stop.
No argument at all will behave as if start was passed.
Survives light testing...

Signed-off-by: Sebastian Moeller <moeller0@gmx.de>
---
 .../files/etc/hotplug.d/iface/11-sqm          |  2 +-
 net/sqm-scripts/files/etc/init.d/sqm          |  2 +-
 net/sqm-scripts/files/usr/lib/sqm/run.sh      | 36 ++++++++++++-------
 3 files changed, 25 insertions(+), 15 deletions(-)

diff --git a/net/sqm-scripts/files/etc/hotplug.d/iface/11-sqm b/net/sqm-scripts/files/etc/hotplug.d/iface/11-sqm
index 99796021d9..439307e310 100755
--- a/net/sqm-scripts/files/etc/hotplug.d/iface/11-sqm
+++ b/net/sqm-scripts/files/etc/hotplug.d/iface/11-sqm
@@ -1,3 +1,3 @@
 #!/bin/sh
 
-[ "$ACTION" = ifup ] && /usr/lib/sqm/run.sh interface ${DEVICE}
+[ "$ACTION" = ifup ] && /usr/lib/sqm/run.sh start ${DEVICE}
diff --git a/net/sqm-scripts/files/etc/init.d/sqm b/net/sqm-scripts/files/etc/init.d/sqm
index 70307a6e1e..2a40afb5aa 100644
--- a/net/sqm-scripts/files/etc/init.d/sqm
+++ b/net/sqm-scripts/files/etc/init.d/sqm
@@ -4,7 +4,7 @@ START=50
 
 reload()
 {
-/usr/lib/sqm/run.sh
+/usr/lib/sqm/run.sh start
 }
 
 restart()
diff --git a/net/sqm-scripts/files/usr/lib/sqm/run.sh b/net/sqm-scripts/files/usr/lib/sqm/run.sh
index 968292bcd3..7aa20ddbab 100755
--- a/net/sqm-scripts/files/usr/lib/sqm/run.sh
+++ b/net/sqm-scripts/files/usr/lib/sqm/run.sh
@@ -13,29 +13,39 @@ STOP=
 ACTIVE_STATE_PREFIX="SQM_active_on_"
 ACTIVE_STATE_FILE_DIR="/var/run/SQM"
 mkdir -p ${ACTIVE_STATE_FILE_DIR}
-PROTO_STATE_FILE_LIST=$( ls ${ACTIVE_STATE_FILE_DIR}/${ACTIVE_STATE_PREFIX}* 2> /dev/null )
+
+
+START_ON_IF=$2	# only process this interface
+# TODO if $2 is empty select all interfaces with running sqm instance
+if [ -z ${START_ON_IF} ] ;
+then
+    # find all interfaces with active sqm instance
+    logger -t SQM -s "Trying to start/stop SQM on all interfaces."
+    PROTO_STATE_FILE_LIST=$( ls ${ACTIVE_STATE_FILE_DIR}/${ACTIVE_STATE_PREFIX}* 2> /dev/null )
+else
+    # only try to restart the just hotplugged interface, so reduce the list of interfaces to stop to the specified one
+    logger -t SQM -s "Trying to start/stop SQM on interface ${START_ON_IF}"
+    PROTO_STATE_FILE_LIST=${ACTIVE_STATE_FILE_DIR}/${ACTIVE_STATE_PREFIX}${START_ON_IF}
+fi
+
+
 
 
 case ${1} in
+    start)
+	# just run through, same as passing no argument
+	;;
     stop)
         logger -t SQM -s "run.sh stop"
 	STOP=$1
         ;;
-    interface)
-	START_ON_IF=$2	# only process this interface
-	logger -t SQM -s "Trying to re-start SQM on interface ${START_ON_IF}"
-	# TODO if $2 is empty just bail...
-	if [ -z ${START_ON_IF} ] ;
-	then
-	    logger -t SQM -s "Interface name missing, nothing to do, bailing out"
-	    return 0
-	fi
-	# only try to restart the just hotplugged interface, so reduce the list of interfaces to stop to the specified one
-	PROTO_STATE_FILE_LIST=${ACTIVE_STATE_FILE_DIR}/${ACTIVE_STATE_PREFIX}${START_ON_IF}
-	;;
 esac
 
 
+
+
+
+
 # the current uci config file does not necessarily contain sections for all interfaces with active
 # SQM instances, so use the ACTIVE_STATE_FILES to detect the interfaces on which to stop SQM.
 # Currently the .qos scripts start with stopping any existing traffic shaping so this should not