samples: pktgen: new append mode

To configure various complex flows we for sure can create custom
pktgen init scripts, but sometimes thats not that easy.

New "-a" (append) option in all the existing sample scripts allows
to append more "devices" into pktgen threads.

The most straightforward usecases for that are:
- using multiple devices. We have to generate full linerate on
all physical functions (ports) of our multiport device.
- pushing multiple flows (with different packet options)

Signed-off-by: Igor Russkikh <irusskikh@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 5 deletions

diff --git a/samples/pktgen/pktgen_sample04_many_flows.sh b/samples/pktgen/pktgen_sample04_many_flows.sh
index ac2d037a6160..ddce876635aa 100755
--- a/samples/pktgen/pktgen_sample04_many_flows.sh
+++ b/samples/pktgen/pktgen_sample04_many_flows.sh
@@ -42,14 +42,14 @@ fi
 read -r SRC_MIN SRC_MAX <<< $(parse_addr 198.18.0.0/15)
 
 # General cleanup everything since last run
-pg_ctrl "reset"
+[ -z "$APPEND" ] && pg_ctrl "reset"
 
 # Threads are specified with parameter -t value in $THREADS
 for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
     dev=${DEV}@${thread}
 
     # Add remove all other devices and add_device $dev to thread
-    pg_thread $thread "rem_device_all"
+    [ -z "$APPEND" ] && pg_thread $thread "rem_device_all"
     pg_thread $thread "add_device" $dev
 
     # Base config
@@ -104,7 +104,11 @@ function print_result() {
 # trap keyboard interrupt (Ctrl-C)
 trap true SIGINT
 
-echo "Running... ctrl^C to stop" >&2
-pg_ctrl "start"
+if [ -z "$APPEND" ]; then
+    echo "Running... ctrl^C to stop" >&2
+    pg_ctrl "start"
 
-print_result
+    print_result
+else
+    echo "Append mode: config done. Do more or use 'pg_ctrl start' to run"
+fi