samples: pktgen: add UDP tx checksum support

Introduce k parameter in pktgen samples in order to toggle UDP tx
checksum

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Acked-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/r/cf16417902062c6ea2fd3c79e00510e36a40c31a.1622210713.git.lorenzo@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Author: LorenzoBianconi

samples/pktgen/parameters.sh

@@ -11,6 +11,7 @@ function usage() {
     echo "  -d : (\$DEST_IP)   destination IP. CIDR (e.g. 198.18.0.0/15) is also allowed"
     echo "  -m : (\$DST_MAC)   destination MAC-addr"
     echo "  -p : (\$DST_PORT)  destination PORT range (e.g. 433-444) is also allowed"
+    echo "  -k : (\$UDP_CSUM)  enable UDP tx checksum"
     echo "  -t : (\$THREADS)   threads to start"
     echo "  -f : (\$F_THREAD)  index of first thread (zero indexed CPU number)"
     echo "  -c : (\$SKB_CLONE) SKB clones send before alloc new SKB"
@@ -26,7 +27,7 @@ function usage() {
 
 ##  --- Parse command line arguments / parameters ---
 ## echo "Commandline options:"
-while getopts "s:i:d:m:p:f:t:c:n:b:w:vxh6a" option; do
+while getopts "s:i:d:m:p:f:t:c:n:b:w:vxh6ak" option; do
     case $option in
         i) # interface
           export DEV=$OPTARG
@@ -88,6 +89,10 @@ while getopts "s:i:d:m:p:f:t:c:n:b:w:vxh6a" option; do
           export APPEND=yes
           info "Append mode: APPEND=$APPEND"
           ;;
+        k)
+          export UDP_CSUM=yes
+          info "UDP tx checksum: UDP_CSUM=$UDP_CSUM"
+          ;;
         h|?|*)
           usage;
           err 2 "[ERROR] Unknown parameters!!!"

samples/pktgen/pktgen_sample01_simple.sh

@@ -72,6 +72,8 @@ if [ -n "$DST_PORT" ]; then
     pg_set $DEV "udp_dst_max $UDP_DST_MAX"
 fi
 
+[ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
+
 # Setup random UDP port src range
 pg_set $DEV "flag UDPSRC_RND"
 pg_set $DEV "udp_src_min $UDP_SRC_MIN"

samples/pktgen/pktgen_sample02_multiqueue.sh

@@ -75,6 +75,8 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 	pg_set $dev "udp_dst_max $UDP_DST_MAX"
     fi
 
+    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
+
     # Setup random UDP port src range
     pg_set $dev "flag UDPSRC_RND"
     pg_set $dev "udp_src_min $UDP_SRC_MIN"

samples/pktgen/pktgen_sample03_burst_single_flow.sh

@@ -73,6 +73,8 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 	pg_set $dev "udp_dst_max $UDP_DST_MAX"
     fi
 
+    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
+
     # Setup burst, for easy testing -b 0 disable bursting
     # (internally in pktgen default and minimum burst=1)
     if [[ ${BURST} -ne 0 ]]; then

samples/pktgen/pktgen_sample04_many_flows.sh

@@ -72,6 +72,8 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 	pg_set $dev "udp_dst_max $UDP_DST_MAX"
     fi
 
+    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
+
     # Randomize source IP-addresses
     pg_set $dev "flag IPSRC_RND"
     pg_set $dev "src_min $SRC_MIN"

samples/pktgen/pktgen_sample05_flow_per_thread.sh

@@ -62,6 +62,8 @@ for ((thread = $F_THREAD; thread <= $L_THREAD; thread++)); do
 	pg_set $dev "udp_dst_max $UDP_DST_MAX"
     fi
 
+    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
+
     # Setup source IP-addresses based on thread number
     pg_set $dev "src_min 198.18.$((thread+1)).1"
     pg_set $dev "src_max 198.18.$((thread+1)).1"

samples/pktgen/pktgen_sample06_numa_awared_queue_irq_affinity.sh

@@ -92,6 +92,8 @@ for ((i = 0; i < $THREADS; i++)); do
 	pg_set $dev "udp_dst_max $UDP_DST_MAX"
     fi
 
+    [ ! -z "$UDP_CSUM" ] && pg_set $dev "flag UDPCSUM"
+
     # Setup random UDP port src range
     pg_set $dev "flag UDPSRC_RND"
     pg_set $dev "udp_src_min $UDP_SRC_MIN"