test/nvmf: zero-copy test

The test has two phases: first it runs a bdevperf with rw=verify to
check data consistency and then runs bdevperf in the background while
sending RPC requests causing the subsystem to be constanty
paused/resumed.

In-capsule data is set to 0 to make sure all IO requests are using
zero-copy.

Signed-off-by: Konrad Sztyber <konrad.sztyber@intel.com>
Change-Id: I1c1d7eb04714c8506307cb95b6cbc5988c8946a3
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/10797
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Community-CI: Broadcom CI <spdk-ci.pdl@broadcom.com>

test/nvmf/nvmf.sh

@@ -63,6 +63,7 @@ if ! check_ip_is_soft_roce $NVMF_FIRST_TARGET_IP; then
 fi
 
 run_test "nvmf_multipath" test/nvmf/target/multipath.sh "${TEST_ARGS[@]}"
+run_test "nvmf_zcopy" test/nvmf/target/zcopy.sh "${TEST_ARGS[@]}"
 
 timing_enter host
 

test/nvmf/target/zcopy.sh

@@ -0,0 +1,47 @@
+#!/usr/bin/env bash
+
+testdir=$(readlink -f $(dirname $0))
+rootdir=$(readlink -f $testdir/../../..)
+
+source $rootdir/test/common/autotest_common.sh
+source $rootdir/test/nvmf/common.sh
+
+rpc_py="$rootdir/scripts/rpc.py"
+
+nvmftestinit
+nvmfappstart
+
+if [ "$TEST_TRANSPORT" != tcp ]; then
+	echo "Unsupported transport: $TEST_TRANSPORT"
+	exit 0
+fi
+
+# Enable zero-copy and set in-capsule data size to zero to make sure all requests are using
+# zero-copy
+$rpc_py nvmf_create_transport $NVMF_TRANSPORT_OPTS -c 0 --zcopy
+
+$rpc_py nvmf_create_subsystem nqn.2016-06.io.spdk:cnode1 -a -s SPDK00000000000001 -m 10
+$rpc_py nvmf_subsystem_add_listener nqn.2016-06.io.spdk:cnode1 -t $TEST_TRANSPORT \
+	-a $NVMF_FIRST_TARGET_IP -s $NVMF_PORT
+$rpc_py bdev_malloc_create 32 4096 -b malloc0
+$rpc_py nvmf_subsystem_add_ns nqn.2016-06.io.spdk:cnode1 malloc0 -n 1
+
+# First send IO with verification
+$rootdir/test/bdev/bdevperf/bdevperf --json <(gen_nvmf_target_json) \
+	-t 10 -q 128 -w verify -o 8192
+
+# Then send IO in the background while pausing/resuming the subsystem
+$rootdir/test/bdev/bdevperf/bdevperf --json <(gen_nvmf_target_json) \
+	-t 5 -q 128 -w randrw -M 50 -o 8192 &
+perfpid=$!
+
+while kill -0 $perfpid; do
+	# Add the same namespace again.  It'll fail, but will also pause/resume the subsystem and
+	# the namespace forcing the IO requests to be queued/resubmitted.
+	$rpc_py nvmf_subsystem_add_ns nqn.2016-06.io.spdk:cnode1 malloc0 -n 1 &> /dev/null || :
+done
+
+wait $perfpid
+
+trap - SIGINT SIGTERM EXIT
+nvmftestfini