test/nvmf: decrease number of subsystems for software rdma

SoftRoce does not implement enough queues
for multiconnection tests and cause test pool failures.
In case interface used for test is software
emulated - reduce number of NVMf subsystems in test.

Change-Id: I52cc78015e72603c487a5774b91c6bd4523326b0
Signed-off-by: Karol Latecki <karol.latecki@intel.com>
Reviewed-on: https://review.gerrithub.io/392357
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>

test/nvmf/common.sh

@@ -146,3 +146,18 @@ function revert_soft_roce()
 		rxe_cfg stop || true
 	fi
 }
+
+function check_ip_is_soft_roce()
+{
+	IP=$1
+	if hash rxe_cfg; then
+		dev=$(ip -4 -o addr show | grep $IP | cut -d" " -f2)
+		if rxe_cfg | grep $dev; then
+			return 0
+		else
+			return 1
+		fi
+	else
+		return 1
+	fi
+}

test/nvmf/multiconnection/multiconnection.sh

@@ -7,6 +7,7 @@ source $rootdir/test/nvmf/common.sh
 
 MALLOC_BDEV_SIZE=128
 MALLOC_BLOCK_SIZE=512
+NVMF_SUBSYS=11
 
 rpc_py="python $rootdir/scripts/rpc.py"
 
@@ -19,6 +20,14 @@ if [ -z $NVMF_FIRST_TARGET_IP ]; then
 	exit 0
 fi
 
+# SoftRoce does not have enough queues available for
+# multiconnection tests. Detect if we're using software RDMA.
+# If so - lower the number of subsystems for test.
+if check_ip_is_soft_roce $NVMF_FIRST_TARGET_IP; then
+	echo "Using software RDMA, lowering number of NVMeOF subsystems."
+	NVMF_SUBSYS=1
+fi
+
 timing_enter multiconnection
 timing_enter start_nvmf_tgt
 # Start up the NVMf target in another process
@@ -32,13 +41,13 @@ timing_exit start_nvmf_tgt
 
 modprobe -v nvme-rdma
 
-for i in `seq 1 11`
+for i in `seq 1 $NVMF_SUBSYS`
 do
 	bdevs="$($rpc_py construct_malloc_bdev $MALLOC_BDEV_SIZE $MALLOC_BLOCK_SIZE)"
 	$rpc_py construct_nvmf_subsystem nqn.2016-06.io.spdk:cnode${i} "trtype:RDMA traddr:$NVMF_FIRST_TARGET_IP trsvcid:$NVMF_PORT" '' -a -s SPDK${i} -n "$bdevs"
 done
 
-for i in `seq 1 11`; do
+for i in `seq 1 $NVMF_SUBSYS`; do
 	nvme connect -t rdma -n "nqn.2016-06.io.spdk:cnode${i}" -a "$NVMF_FIRST_TARGET_IP" -s "$NVMF_PORT"
 done
 
@@ -46,7 +55,7 @@ $testdir/../fio/nvmf_fio.py 262144 64 read 10
 $testdir/../fio/nvmf_fio.py 262144 64 randwrite 10
 
 sync
-for i in `seq 1 11`; do
+for i in `seq 1 $NVMF_SUBSYS`; do
 	nvme disconnect -n "nqn.2016-06.io.spdk:cnode${i}" || true
 	$rpc_py delete_nvmf_subsystem nqn.2016-06.io.spdk:cnode${i}
 done