samples: pktgen: fix append mode failed issue

Each sample script sources functions.sh before parameters.sh
which makes $APPEND undefined when trapping EXIT no matter in
append mode or not. Due to this when sample scripts finished
they always do "pgctrl reset" which resets pktgen config.

So move trap to each script after sourcing parameters.sh
and trap EXIT explicitly.
Signed-off-by: J.J. Martzki <mars14850@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

samples/pktgen/functions.sh

@@ -108,12 +108,13 @@ function pgset() {
     fi
 }
 
-if [[ -z "$APPEND" ]]; then
-	if [[ $EUID -eq 0 ]]; then
-		# Cleanup pktgen setup on exit if thats not "append mode"
-		trap 'pg_ctrl "reset"' EXIT
-	fi
-fi
+function trap_exit()
+{
+    # Cleanup pktgen setup on exit if thats not "append mode"
+    if [[ -z "$APPEND" ]] && [[ $EUID -eq 0 ]]; then
+        trap 'pg_ctrl "reset"' EXIT
+    fi
+}
 
 ## -- General shell tricks --
 

samples/pktgen/pktgen_bench_xmit_mode_netif_receive.sh

@@ -33,6 +33,10 @@ root_check_run_with_sudo "$@"
 
 # Parameter parsing via include
 source ${basedir}/parameters.sh
+
+# Trap EXIT first
+trap_exit
+
 # Using invalid DST_MAC will cause the packets to get dropped in
 # ip_rcv() which is part of the test
 if [ -z "$DEST_IP" ]; then

samples/pktgen/pktgen_bench_xmit_mode_queue_xmit.sh

@@ -14,6 +14,10 @@ root_check_run_with_sudo "$@"
 
 # Parameter parsing via include
 source ${basedir}/parameters.sh
+
+# Trap EXIT first
+trap_exit
+
 if [ -z "$DEST_IP" ]; then
     [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"
 fi

samples/pktgen/pktgen_sample01_simple.sh

@@ -13,6 +13,10 @@ root_check_run_with_sudo "$@"
 # - go look in parameters.sh to see which setting are avail
 # - required param is the interface "-i" stored in $DEV
 source ${basedir}/parameters.sh
+
+# Trap EXIT first
+trap_exit
+
 #
 # Set some default params, if they didn't get set
 if [ -z "$DEST_IP" ]; then

samples/pktgen/pktgen_sample02_multiqueue.sh

@@ -14,6 +14,9 @@ root_check_run_with_sudo "$@"
 # Required param: -i dev in $DEV
 source ${basedir}/parameters.sh
 
+# Trap EXIT first
+trap_exit
+
 [ -z "$COUNT" ] && COUNT="100000" # Zero means indefinitely
 
 # Base Config

samples/pktgen/pktgen_sample03_burst_single_flow.sh

@@ -25,6 +25,10 @@ root_check_run_with_sudo "$@"
 
 # Parameter parsing via include
 source ${basedir}/parameters.sh
+
+# Trap EXIT first
+trap_exit
+
 # Set some default params, if they didn't get set
 if [ -z "$DEST_IP" ]; then
     [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"

samples/pktgen/pktgen_sample04_many_flows.sh

@@ -12,6 +12,10 @@ root_check_run_with_sudo "$@"
 
 # Parameter parsing via include
 source ${basedir}/parameters.sh
+
+# Trap EXIT first
+trap_exit
+
 # Set some default params, if they didn't get set
 if [ -z "$DEST_IP" ]; then
     [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"

samples/pktgen/pktgen_sample05_flow_per_thread.sh

@@ -16,6 +16,10 @@ root_check_run_with_sudo "$@"
 
 # Parameter parsing via include
 source ${basedir}/parameters.sh
+
+# Trap EXIT first
+trap_exit
+
 # Set some default params, if they didn't get set
 if [ -z "$DEST_IP" ]; then
     [ -z "$IP6" ] && DEST_IP="198.18.0.42" || DEST_IP="FD00::1"

samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh

@@ -14,6 +14,9 @@ root_check_run_with_sudo "$@"
 # Required param: -i dev in $DEV
 source ${basedir}/parameters.sh
 
+# Trap EXIT first
+trap_exit
+
 # Base Config
 [ -z "$COUNT" ]     && COUNT="20000000"   # Zero means indefinitely
 [ -z "$CLONE_SKB" ] && CLONE_SKB="0"