selftests: netdevsim: add tests for devlink reload with resources

Add couple of tests for devlink reload testing and also resource
limitations testing, along with devlink reload.
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

tools/testing/selftests/drivers/net/netdevsim/devlink.sh

@@ -3,7 +3,8 @@
 
 lib_dir=$(dirname $0)/../../../net/forwarding
 
-ALL_TESTS="fw_flash_test params_test regions_test"
+ALL_TESTS="fw_flash_test params_test regions_test reload_test \
+	   netns_reload_test resource_test"
 NUM_NETIFS=0
 source $lib_dir/lib.sh
 
@@ -142,6 +143,123 @@ regions_test()
 	log_test "regions test"
 }
 
+reload_test()
+{
+	RET=0
+
+	devlink dev reload $DL_HANDLE
+	check_err $? "Failed to reload"
+
+	log_test "reload test"
+}
+
+netns_reload_test()
+{
+	RET=0
+
+	ip netns add testns1
+	check_err $? "Failed add netns \"testns1\""
+	ip netns add testns2
+	check_err $? "Failed add netns \"testns2\""
+
+	devlink dev reload $DL_HANDLE netns testns1
+	check_err $? "Failed to reload into netns \"testns1\""
+
+	devlink -N testns1 dev reload $DL_HANDLE netns testns2
+	check_err $? "Failed to reload from netns \"testns1\" into netns \"testns2\""
+
+	ip netns del testns2
+	ip netns del testns1
+
+	log_test "netns reload test"
+}
+
+DUMMYDEV="dummytest"
+
+res_val_get()
+{
+	local netns=$1
+	local parentname=$2
+	local name=$3
+	local type=$4
+
+	cmd_jq "devlink -N $netns resource show $DL_HANDLE -j" \
+	       ".[][][] | select(.name == \"$parentname\").resources[] \
+	        | select(.name == \"$name\").$type"
+}
+
+resource_test()
+{
+	RET=0
+
+	ip netns add testns1
+	check_err $? "Failed add netns \"testns1\""
+	ip netns add testns2
+	check_err $? "Failed add netns \"testns2\""
+
+	devlink dev reload $DL_HANDLE netns testns1
+	check_err $? "Failed to reload into netns \"testns1\""
+
+	# Create dummy dev to add the address and routes on.
+
+	ip -n testns1 link add name $DUMMYDEV type dummy
+	check_err $? "Failed create dummy device"
+	ip -n testns1 link set $DUMMYDEV up
+	check_err $? "Failed bring up dummy device"
+	ip -n testns1 a a 192.0.1.1/24 dev $DUMMYDEV
+	check_err $? "Failed add an IP address to dummy device"
+
+	local occ=$(res_val_get testns1 IPv4 fib occ)
+	local limit=$((occ+1))
+
+	# Set fib size limit to handle one another route only.
+
+	devlink -N testns1 resource set $DL_HANDLE path IPv4/fib size $limit
+	check_err $? "Failed to set IPv4/fib resource size"
+	local size_new=$(res_val_get testns1 IPv4 fib size_new)
+	[ "$size_new" -eq "$limit" ]
+	check_err $? "Unexpected \"size_new\" value (got $size_new, expected $limit)"
+
+	devlink -N testns1 dev reload $DL_HANDLE
+	check_err $? "Failed to reload"
+	local size=$(res_val_get testns1 IPv4 fib size)
+	[ "$size" -eq "$limit" ]
+	check_err $? "Unexpected \"size\" value (got $size, expected $limit)"
+
+	# Insert 2 routes, the first is going to be inserted,
+	# the second is expected to fail to be inserted.
+
+	ip -n testns1 r a 192.0.2.0/24 via 192.0.1.2
+	check_err $? "Failed to add route"
+
+	ip -n testns1 r a 192.0.3.0/24 via 192.0.1.2
+	check_fail $? "Unexpected successful route add over limit"
+
+	# Now create another dummy in second network namespace and
+	# insert two routes. That is over the limit of the netdevsim
+	# instance in the first namespace. Move the netdevsim instance
+	# into the second namespace and expect it to fail.
+
+	ip -n testns2 link add name $DUMMYDEV type dummy
+	check_err $? "Failed create dummy device"
+	ip -n testns2 link set $DUMMYDEV up
+	check_err $? "Failed bring up dummy device"
+	ip -n testns2 a a 192.0.1.1/24 dev $DUMMYDEV
+	check_err $? "Failed add an IP address to dummy device"
+	ip -n testns2 r a 192.0.2.0/24 via 192.0.1.2
+	check_err $? "Failed to add route"
+	ip -n testns2 r a 192.0.3.0/24 via 192.0.1.2
+	check_err $? "Failed to add route"
+
+	devlink -N testns1 dev reload $DL_HANDLE netns testns2
+	check_fail $? "Unexpected successful reload from netns \"testns1\" into netns \"testns2\""
+
+	ip netns del testns2
+	ip netns del testns1
+
+	log_test "resource test"
+}
+
 setup_prepare()
 {
 	modprobe netdevsim