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* [PATCH bpf-next v3 0/4] selftests/bpf: xsk improvements and new stats tests
@ 2021-02-23 16:23 Ciara Loftus
  2021-02-23 16:23 ` [PATCH bpf-next v3 1/4] selftest/bpf: make xsk tests less verbose Ciara Loftus
                   ` (3 more replies)
  0 siblings, 4 replies; 5+ messages in thread
From: Ciara Loftus @ 2021-02-23 16:23 UTC (permalink / raw)
  To: netdev, bpf, magnus.karlsson, bjorn, weqaar.a.janjua, maciej.fijalkowski
  Cc: Ciara Loftus

This series attempts to improve the xsk selftest framework by:
1. making the default output less verbose
2. adding an optional verbose flag to both the test_xsk.sh script and xdpxceiver app.
3. renaming the debug option in the app to to 'dump-pkts' and add a flag to the test_xsk.sh
script which enables the flag in the app.
4. changing how tests are launched - now they are launched from the xdpxceiver app
instead of the script.

Once the improvements are made, a new set of tests are added which test the xsk
statistics.

The output of the test script now looks like:

./test_xsk.sh
PREREQUISITES: [ PASS ]
1..10
ok 1 PASS: SKB NOPOLL 
ok 2 PASS: SKB POLL 
ok 3 PASS: SKB NOPOLL Socket Teardown
ok 4 PASS: SKB NOPOLL Bi-directional Sockets
ok 5 PASS: SKB NOPOLL Stats
ok 6 PASS: DRV NOPOLL 
ok 7 PASS: DRV POLL 
ok 8 PASS: DRV NOPOLL Socket Teardown
ok 9 PASS: DRV NOPOLL Bi-directional Sockets
ok 10 PASS: DRV NOPOLL Stats
# Totals: pass:10 fail:0 xfail:0 xpass:0 skip:0 error:0
XSK KSELFTESTS: [ PASS ]

v2->v3:
* Rename dump-pkts to dump_pkts in test_xsk.sh
* Add examples of flag usage to test_xsk.sh 

v1->v2:
* Changed '-d' flag in the shell script to '-D' to be consistent with the xdpxceiver app.
* Renamed debug mode to 'dump-pkts' which better reflects the behaviour.
* Use libpf APIs instead of calls to ss for configuring xdp on the links
* Remove mutex init & destroy for each stats test
* Added a description for each of the new statistics tests
* Distinguish between exiting due to initialisation failure vs test failure

This series applies on commit d310ec03a34e92a77302edb804f7d68ee4f01ba0


Ciara Loftus (3):
  selftests/bpf: expose and rename debug argument
  selftests/bpf: restructure xsk selftests
  selftests/bpf: introduce xsk statistics tests

Magnus Karlsson (1):
  selftest/bpf: make xsk tests less verbose

 tools/testing/selftests/bpf/test_xsk.sh    | 135 ++------
 tools/testing/selftests/bpf/xdpxceiver.c   | 380 +++++++++++++++------
 tools/testing/selftests/bpf/xdpxceiver.h   |  57 +++-
 tools/testing/selftests/bpf/xsk_prereqs.sh |  30 +-
 4 files changed, 342 insertions(+), 260 deletions(-)

-- 
2.17.1


^ permalink raw reply	[flat|nested] 5+ messages in thread

* [PATCH bpf-next v3 1/4] selftest/bpf: make xsk tests less verbose
  2021-02-23 16:23 [PATCH bpf-next v3 0/4] selftests/bpf: xsk improvements and new stats tests Ciara Loftus
@ 2021-02-23 16:23 ` Ciara Loftus
  2021-02-23 16:23 ` [PATCH bpf-next v3 2/4] selftests/bpf: expose and rename debug argument Ciara Loftus
                   ` (2 subsequent siblings)
  3 siblings, 0 replies; 5+ messages in thread
From: Ciara Loftus @ 2021-02-23 16:23 UTC (permalink / raw)
  To: netdev, bpf, magnus.karlsson, bjorn, weqaar.a.janjua, maciej.fijalkowski
  Cc: Ciara Loftus

From: Magnus Karlsson <magnus.karlsson@intel.com>

Make the xsk tests less verbose by only printing the
essentials. Currently, it is hard to see if the tests passed or not
due to all the printouts. Move the extra printouts to a verbose
option, if further debugging is needed when a problem arises.

To run the xsk tests with verbose output:
./test_xsk.sh -v

Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com>
Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Acked-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
---
 tools/testing/selftests/bpf/test_xsk.sh    | 27 ++++++++++++++-----
 tools/testing/selftests/bpf/xdpxceiver.c   | 31 +++++++++++++---------
 tools/testing/selftests/bpf/xdpxceiver.h   | 13 +++++----
 tools/testing/selftests/bpf/xsk_prereqs.sh |  9 +++----
 4 files changed, 50 insertions(+), 30 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_xsk.sh b/tools/testing/selftests/bpf/test_xsk.sh
index 88a7483eaae4..f4cedf4c2718 100755
--- a/tools/testing/selftests/bpf/test_xsk.sh
+++ b/tools/testing/selftests/bpf/test_xsk.sh
@@ -71,13 +71,17 @@
 #
 # Run (full output without color-coding):
 #   sudo ./test_xsk.sh
+#
+# Run with verbose output:
+#   sudo ./test_xsk.sh -v
 
 . xsk_prereqs.sh
 
-while getopts c flag
+while getopts "cv" flag
 do
 	case "${flag}" in
 		c) colorconsole=1;;
+		v) verbose=1;;
 	esac
 done
 
@@ -95,13 +99,17 @@ NS1=af_xdp${VETH1_POSTFIX}
 MTU=1500
 
 setup_vethPairs() {
-	echo "setting up ${VETH0}: namespace: ${NS0}"
+	if [[ $verbose -eq 1 ]]; then
+	        echo "setting up ${VETH0}: namespace: ${NS0}"
+	fi
 	ip netns add ${NS1}
 	ip link add ${VETH0} type veth peer name ${VETH1}
 	if [ -f /proc/net/if_inet6 ]; then
 		echo 1 > /proc/sys/net/ipv6/conf/${VETH0}/disable_ipv6
 	fi
-	echo "setting up ${VETH1}: namespace: ${NS1}"
+	if [[ $verbose -eq 1 ]]; then
+	        echo "setting up ${VETH1}: namespace: ${NS1}"
+	fi
 	ip link set ${VETH1} netns ${NS1}
 	ip netns exec ${NS1} ip link set ${VETH1} mtu ${MTU}
 	ip link set ${VETH0} mtu ${MTU}
@@ -125,7 +133,10 @@ echo "${VETH0}:${VETH1},${NS1}" > ${SPECFILE}
 
 validate_veth_spec_file
 
-echo "Spec file created: ${SPECFILE}"
+if [[ $verbose -eq 1 ]]; then
+        echo "Spec file created: ${SPECFILE}"
+	VERBOSE_ARG="-v"
+fi
 
 test_status $retval "${TEST_NAME}"
 
@@ -136,12 +147,16 @@ statusList=()
 ### TEST 1
 TEST_NAME="XSK KSELFTEST FRAMEWORK"
 
-echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Generic mode"
+if [[ $verbose -eq 1 ]]; then
+        echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Generic mode"
+fi
 vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
 
 retval=$?
 if [ $retval -eq 0 ]; then
-	echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Native mode"
+        if [[ $verbose -eq 1 ]]; then
+	        echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Native mode"
+	fi
 	vethXDPnative ${VETH0} ${VETH1} ${NS1}
 fi
 
diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c
index f4a96d5ff524..8af746c9a6b6 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.c
+++ b/tools/testing/selftests/bpf/xdpxceiver.c
@@ -341,6 +341,7 @@ static struct option long_options[] = {
 	{"tear-down", no_argument, 0, 'T'},
 	{"bidi", optional_argument, 0, 'B'},
 	{"debug", optional_argument, 0, 'D'},
+	{"verbose", no_argument, 0, 'v'},
 	{"tx-pkt-count", optional_argument, 0, 'C'},
 	{0, 0, 0, 0}
 };
@@ -359,6 +360,7 @@ static void usage(const char *prog)
 	    "  -T, --tear-down      Tear down sockets by repeatedly recreating them\n"
 	    "  -B, --bidi           Bi-directional sockets test\n"
 	    "  -D, --debug          Debug mode - dump packets L2 - L5\n"
+	    "  -v, --verbose        Verbose output\n"
 	    "  -C, --tx-pkt-count=n Number of packets to send\n";
 	ksft_print_msg(str, prog);
 }
@@ -392,7 +394,7 @@ static void *nsswitchthread(void *args)
 			ksft_test_result_fail("ERROR: [%s] interface \"%s\" does not exist\n",
 					      __func__, ifdict[targs->idx]->ifname);
 		} else {
-			ksft_print_msg("Interface found: %s\n", ifdict[targs->idx]->ifname);
+			print_verbose("Interface found: %s\n", ifdict[targs->idx]->ifname);
 			targs->retptr = true;
 		}
 	}
@@ -422,7 +424,7 @@ static int validate_interfaces(void)
 			pthread_join(ns_thread, NULL);
 
 			if (targs->retptr)
-				ksft_print_msg("NS switched: %s\n", ifdict[i]->nsname);
+				print_verbose("NS switched: %s\n", ifdict[i]->nsname);
 
 			free(targs);
 		} else {
@@ -432,7 +434,7 @@ static int validate_interfaces(void)
 				    ("ERROR: interface \"%s\" does not exist\n", ifdict[i]->ifname);
 				ret = false;
 			} else {
-				ksft_print_msg("Interface found: %s\n", ifdict[i]->ifname);
+				print_verbose("Interface found: %s\n", ifdict[i]->ifname);
 			}
 		}
 	}
@@ -446,7 +448,7 @@ static void parse_command_line(int argc, char **argv)
 	opterr = 0;
 
 	for (;;) {
-		c = getopt_long(argc, argv, "i:q:pSNcTBDC:", long_options, &option_index);
+		c = getopt_long(argc, argv, "i:q:pSNcTBDC:v", long_options, &option_index);
 
 		if (c == -1)
 			break;
@@ -497,6 +499,9 @@ static void parse_command_line(int argc, char **argv)
 		case 'C':
 			opt_pkt_count = atoi(optarg);
 			break;
+		case 'v':
+			opt_verbose = 1;
+			break;
 		default:
 			usage(basename(argv[0]));
 			ksft_exit_xfail();
@@ -714,7 +719,7 @@ static void worker_pkt_dump(void)
 		int payload = *((uint32_t *)(pkt_buf[iter]->payload + PKT_HDR_SIZE));
 
 		if (payload == EOT) {
-			ksft_print_msg("End-of-transmission frame received\n");
+			print_verbose("End-of-transmission frame received\n");
 			fprintf(stdout, "---------------------------------------\n");
 			break;
 		}
@@ -746,7 +751,7 @@ static void worker_pkt_validate(void)
 			}
 
 			if (payloadseqnum == EOT) {
-				ksft_print_msg("End-of-transmission frame received: PASS\n");
+				print_verbose("End-of-transmission frame received: PASS\n");
 				sigvar = 1;
 				break;
 			}
@@ -836,7 +841,7 @@ static void *worker_testapp_validate(void *arg)
 			usleep(USLEEP_MAX);
 		}
 
-		ksft_print_msg("Interface [%s] vector [Tx]\n", ifobject->ifname);
+		print_verbose("Interface [%s] vector [Tx]\n", ifobject->ifname);
 		for (int i = 0; i < num_frames; i++) {
 			/*send EOT frame */
 			if (i == (num_frames - 1))
@@ -850,7 +855,7 @@ static void *worker_testapp_validate(void *arg)
 			gen_eth_frame(ifobject->umem, i * XSK_UMEM__DEFAULT_FRAME_SIZE);
 		}
 
-		ksft_print_msg("Sending %d packets on interface %s\n",
+		print_verbose("Sending %d packets on interface %s\n",
 			       (opt_pkt_count - 1), ifobject->ifname);
 		tx_only_all(ifobject);
 	} else if (ifobject->fv.vector == rx) {
@@ -860,7 +865,7 @@ static void *worker_testapp_validate(void *arg)
 		if (!bidi_pass)
 			thread_common_ops(ifobject, bufs, &sync_mutex_tx, &spinning_rx);
 
-		ksft_print_msg("Interface [%s] vector [Rx]\n", ifobject->ifname);
+		print_verbose("Interface [%s] vector [Rx]\n", ifobject->ifname);
 		xsk_populate_fill_ring(ifobject->umem);
 
 		TAILQ_INIT(&head);
@@ -890,11 +895,11 @@ static void *worker_testapp_validate(void *arg)
 				break;
 		}
 
-		ksft_print_msg("Received %d packets on interface %s\n",
+		print_verbose("Received %d packets on interface %s\n",
 			       pkt_counter, ifobject->ifname);
 
 		if (opt_teardown)
-			ksft_print_msg("Destroying socket\n");
+			print_verbose("Destroying socket\n");
 	}
 
 	if (!opt_bidi || bidi_pass) {
@@ -914,7 +919,7 @@ static void testapp_validate(void)
 	if (opt_bidi && bidi_pass) {
 		pthread_init_mutex();
 		if (!switching_notify) {
-			ksft_print_msg("Switching Tx/Rx vectors\n");
+			print_verbose("Switching Tx/Rx vectors\n");
 			switching_notify++;
 		}
 	}
@@ -974,7 +979,7 @@ static void testapp_sockets(void)
 		pkt_counter = 0;
 		prev_pkt = -1;
 		sigvar = 0;
-		ksft_print_msg("Creating socket\n");
+		print_verbose("Creating socket\n");
 		testapp_validate();
 		opt_bidi ? bidi_pass++ : bidi_pass;
 	}
diff --git a/tools/testing/selftests/bpf/xdpxceiver.h b/tools/testing/selftests/bpf/xdpxceiver.h
index 0e9f9b7e61c2..f66f399dfb2d 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.h
+++ b/tools/testing/selftests/bpf/xdpxceiver.h
@@ -42,6 +42,8 @@
 #define POLL_TMOUT 1000
 #define NEED_WAKEUP true
 
+#define print_verbose(x...) do { if (opt_verbose) ksft_print_msg(x); } while (0)
+
 typedef __u32 u32;
 typedef __u16 u16;
 typedef __u8 u8;
@@ -51,11 +53,11 @@ enum TESTS {
 	ORDER_CONTENT_VALIDATE_XDP_DRV = 1,
 };
 
-u8 uut;
-u8 debug_pkt_dump;
-u32 num_frames;
-u8 switching_notify;
-u8 bidi_pass;
+static u8 uut;
+static u8 debug_pkt_dump;
+static u32 num_frames;
+static u8 switching_notify;
+static u8 bidi_pass;
 
 static u32 opt_xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
 static int opt_queue;
@@ -64,6 +66,7 @@ static int opt_poll;
 static int opt_teardown;
 static int opt_bidi;
 static u32 opt_xdp_bind_flags = XDP_USE_NEED_WAKEUP;
+static u8 opt_verbose;
 static u8 pkt_data[XSK_UMEM__DEFAULT_FRAME_SIZE];
 static u32 pkt_counter;
 static u32 prev_pkt = -1;
diff --git a/tools/testing/selftests/bpf/xsk_prereqs.sh b/tools/testing/selftests/bpf/xsk_prereqs.sh
index 9d54c4645127..ef8c5b31f4b6 100755
--- a/tools/testing/selftests/bpf/xsk_prereqs.sh
+++ b/tools/testing/selftests/bpf/xsk_prereqs.sh
@@ -82,24 +82,21 @@ clear_configs()
 {
 	if [ $(ip netns show | grep $3 &>/dev/null; echo $?;) == 0 ]; then
 		[ $(ip netns exec $3 ip link show $2 &>/dev/null; echo $?;) == 0 ] &&
-			{ echo "removing link $1:$2"; ip netns exec $3 ip link del $2; }
-		echo "removing ns $3"
+			{ ip netns exec $3 ip link del $2; }
 		ip netns del $3
 	fi
 	#Once we delete a veth pair node, the entire veth pair is removed,
 	#this is just to be cautious just incase the NS does not exist then
 	#veth node inside NS won't get removed so we explicitly remove it
 	[ $(ip link show $1 &>/dev/null; echo $?;) == 0 ] &&
-		{ echo "removing link $1"; ip link del $1; }
+		{ ip link del $1; }
 	if [ -f ${SPECFILE} ]; then
-		echo "removing spec file:" ${SPECFILE}
 		rm -f ${SPECFILE}
 	fi
 }
 
 cleanup_exit()
 {
-	echo "cleaning up..."
 	clear_configs $1 $2 $3
 }
 
@@ -131,5 +128,5 @@ execxdpxceiver()
 			copy[$index]=${!current}
 		done
 
-	./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} ${copy[*]} -C ${NUMPKTS}
+	./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} ${copy[*]} -C ${NUMPKTS} ${VERBOSE_ARG}
 }
-- 
2.17.1


^ permalink raw reply	[flat|nested] 5+ messages in thread

* [PATCH bpf-next v3 2/4] selftests/bpf: expose and rename debug argument
  2021-02-23 16:23 [PATCH bpf-next v3 0/4] selftests/bpf: xsk improvements and new stats tests Ciara Loftus
  2021-02-23 16:23 ` [PATCH bpf-next v3 1/4] selftest/bpf: make xsk tests less verbose Ciara Loftus
@ 2021-02-23 16:23 ` Ciara Loftus
  2021-02-23 16:23 ` [PATCH bpf-next v3 3/4] selftests/bpf: restructure xsk selftests Ciara Loftus
  2021-02-23 16:23 ` [PATCH bpf-next v3 4/4] selftests/bpf: introduce xsk statistics tests Ciara Loftus
  3 siblings, 0 replies; 5+ messages in thread
From: Ciara Loftus @ 2021-02-23 16:23 UTC (permalink / raw)
  To: netdev, bpf, magnus.karlsson, bjorn, weqaar.a.janjua, maciej.fijalkowski
  Cc: Ciara Loftus

Launching xdpxceiver with -D enables what was formerly know as 'debug'
mode. Rename this mode to 'dump-pkts' as it better describes the
behavior enabled by the option. New usage:

./xdpxceiver .. -D
or
./xdpxceiver .. --dump-pkts

Also make it possible to pass this flag to the app via the test_xsk.sh
shell script like so:

./test_xsk.sh -D

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
---
 tools/testing/selftests/bpf/test_xsk.sh    | 10 +++++++++-
 tools/testing/selftests/bpf/xdpxceiver.c   |  6 +++---
 tools/testing/selftests/bpf/xsk_prereqs.sh |  3 ++-
 3 files changed, 14 insertions(+), 5 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_xsk.sh b/tools/testing/selftests/bpf/test_xsk.sh
index f4cedf4c2718..dbb129a36606 100755
--- a/tools/testing/selftests/bpf/test_xsk.sh
+++ b/tools/testing/selftests/bpf/test_xsk.sh
@@ -74,14 +74,18 @@
 #
 # Run with verbose output:
 #   sudo ./test_xsk.sh -v
+#
+# Run and dump packet contents:
+#   sudo ./test_xsk.sh -D
 
 . xsk_prereqs.sh
 
-while getopts "cv" flag
+while getopts "cvD" flag
 do
 	case "${flag}" in
 		c) colorconsole=1;;
 		v) verbose=1;;
+		D) dump_pkts=1;;
 	esac
 done
 
@@ -138,6 +142,10 @@ if [[ $verbose -eq 1 ]]; then
 	VERBOSE_ARG="-v"
 fi
 
+if [[ $dump_pkts -eq 1 ]]; then
+	DUMP_PKTS_ARG="-D"
+fi
+
 test_status $retval "${TEST_NAME}"
 
 ## START TESTS
diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c
index 8af746c9a6b6..506423201197 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.c
+++ b/tools/testing/selftests/bpf/xdpxceiver.c
@@ -58,7 +58,7 @@
  * - Rx thread verifies if all 10k packets were received and delivered in-order,
  *   and have the right content
  *
- * Enable/disable debug mode:
+ * Enable/disable packet dump mode:
  * --------------------------
  * To enable L2 - L4 headers and payload dump of each packet on STDOUT, add
  * parameter -D to params array in test_xsk.sh, i.e. params=("-S" "-D")
@@ -340,7 +340,7 @@ static struct option long_options[] = {
 	{"copy", no_argument, 0, 'c'},
 	{"tear-down", no_argument, 0, 'T'},
 	{"bidi", optional_argument, 0, 'B'},
-	{"debug", optional_argument, 0, 'D'},
+	{"dump-pkts", optional_argument, 0, 'D'},
 	{"verbose", no_argument, 0, 'v'},
 	{"tx-pkt-count", optional_argument, 0, 'C'},
 	{0, 0, 0, 0}
@@ -359,7 +359,7 @@ static void usage(const char *prog)
 	    "  -c, --copy           Force copy mode\n"
 	    "  -T, --tear-down      Tear down sockets by repeatedly recreating them\n"
 	    "  -B, --bidi           Bi-directional sockets test\n"
-	    "  -D, --debug          Debug mode - dump packets L2 - L5\n"
+	    "  -D, --dump-pkts      Dump packets L2 - L5\n"
 	    "  -v, --verbose        Verbose output\n"
 	    "  -C, --tx-pkt-count=n Number of packets to send\n";
 	ksft_print_msg(str, prog);
diff --git a/tools/testing/selftests/bpf/xsk_prereqs.sh b/tools/testing/selftests/bpf/xsk_prereqs.sh
index ef8c5b31f4b6..da93575d757a 100755
--- a/tools/testing/selftests/bpf/xsk_prereqs.sh
+++ b/tools/testing/selftests/bpf/xsk_prereqs.sh
@@ -128,5 +128,6 @@ execxdpxceiver()
 			copy[$index]=${!current}
 		done
 
-	./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} ${copy[*]} -C ${NUMPKTS} ${VERBOSE_ARG}
+	./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} ${copy[*]} -C ${NUMPKTS} ${VERBOSE_ARG} \
+		${DUMP_PKTS_ARG}
 }
-- 
2.17.1


^ permalink raw reply	[flat|nested] 5+ messages in thread

* [PATCH bpf-next v3 3/4] selftests/bpf: restructure xsk selftests
  2021-02-23 16:23 [PATCH bpf-next v3 0/4] selftests/bpf: xsk improvements and new stats tests Ciara Loftus
  2021-02-23 16:23 ` [PATCH bpf-next v3 1/4] selftest/bpf: make xsk tests less verbose Ciara Loftus
  2021-02-23 16:23 ` [PATCH bpf-next v3 2/4] selftests/bpf: expose and rename debug argument Ciara Loftus
@ 2021-02-23 16:23 ` Ciara Loftus
  2021-02-23 16:23 ` [PATCH bpf-next v3 4/4] selftests/bpf: introduce xsk statistics tests Ciara Loftus
  3 siblings, 0 replies; 5+ messages in thread
From: Ciara Loftus @ 2021-02-23 16:23 UTC (permalink / raw)
  To: netdev, bpf, magnus.karlsson, bjorn, weqaar.a.janjua, maciej.fijalkowski
  Cc: Ciara Loftus

Prior to this commit individual xsk tests were launched from the
shell script 'test_xsk.sh'. When adding a new test type, two new test
configurations had to be added to this file - one for each of the
supported XDP 'modes' (skb or drv). Should zero copy support be added to
the xsk selftest framework in the future, three new test configurations
would need to be added for each new test type. Each new test type also
typically requires new CLI arguments for the xdpxceiver program.

This commit aims to reduce the overhead of adding new tests, by launching
the test configurations from within the xdpxceiver program itself, using
simple loops. Every test is run every time the C program is executed. Many
of the CLI arguments can be removed as a result.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
---
 tools/testing/selftests/bpf/test_xsk.sh    | 112 +----------
 tools/testing/selftests/bpf/xdpxceiver.c   | 218 +++++++++++++--------
 tools/testing/selftests/bpf/xdpxceiver.h   |  33 ++--
 tools/testing/selftests/bpf/xsk_prereqs.sh |  24 +--
 4 files changed, 159 insertions(+), 228 deletions(-)

diff --git a/tools/testing/selftests/bpf/test_xsk.sh b/tools/testing/selftests/bpf/test_xsk.sh
index dbb129a36606..56d4474e2c83 100755
--- a/tools/testing/selftests/bpf/test_xsk.sh
+++ b/tools/testing/selftests/bpf/test_xsk.sh
@@ -152,117 +152,9 @@ test_status $retval "${TEST_NAME}"
 
 statusList=()
 
-### TEST 1
-TEST_NAME="XSK KSELFTEST FRAMEWORK"
+TEST_NAME="XSK KSELFTESTS"
 
-if [[ $verbose -eq 1 ]]; then
-        echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Generic mode"
-fi
-vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
-
-retval=$?
-if [ $retval -eq 0 ]; then
-        if [[ $verbose -eq 1 ]]; then
-	        echo "Switching interfaces [${VETH0}, ${VETH1}] to XDP Native mode"
-	fi
-	vethXDPnative ${VETH0} ${VETH1} ${NS1}
-fi
-
-retval=$?
-test_status $retval "${TEST_NAME}"
-statusList+=($retval)
-
-### TEST 2
-TEST_NAME="SKB NOPOLL"
-
-vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
-
-params=("-S")
-execxdpxceiver params
-
-retval=$?
-test_status $retval "${TEST_NAME}"
-statusList+=($retval)
-
-### TEST 3
-TEST_NAME="SKB POLL"
-
-vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
-
-params=("-S" "-p")
-execxdpxceiver params
-
-retval=$?
-test_status $retval "${TEST_NAME}"
-statusList+=($retval)
-
-### TEST 4
-TEST_NAME="DRV NOPOLL"
-
-vethXDPnative ${VETH0} ${VETH1} ${NS1}
-
-params=("-N")
-execxdpxceiver params
-
-retval=$?
-test_status $retval "${TEST_NAME}"
-statusList+=($retval)
-
-### TEST 5
-TEST_NAME="DRV POLL"
-
-vethXDPnative ${VETH0} ${VETH1} ${NS1}
-
-params=("-N" "-p")
-execxdpxceiver params
-
-retval=$?
-test_status $retval "${TEST_NAME}"
-statusList+=($retval)
-
-### TEST 6
-TEST_NAME="SKB SOCKET TEARDOWN"
-
-vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
-
-params=("-S" "-T")
-execxdpxceiver params
-
-retval=$?
-test_status $retval "${TEST_NAME}"
-statusList+=($retval)
-
-### TEST 7
-TEST_NAME="DRV SOCKET TEARDOWN"
-
-vethXDPnative ${VETH0} ${VETH1} ${NS1}
-
-params=("-N" "-T")
-execxdpxceiver params
-
-retval=$?
-test_status $retval "${TEST_NAME}"
-statusList+=($retval)
-
-### TEST 8
-TEST_NAME="SKB BIDIRECTIONAL SOCKETS"
-
-vethXDPgeneric ${VETH0} ${VETH1} ${NS1}
-
-params=("-S" "-B")
-execxdpxceiver params
-
-retval=$?
-test_status $retval "${TEST_NAME}"
-statusList+=($retval)
-
-### TEST 9
-TEST_NAME="DRV BIDIRECTIONAL SOCKETS"
-
-vethXDPnative ${VETH0} ${VETH1} ${NS1}
-
-params=("-N" "-B")
-execxdpxceiver params
+execxdpxceiver
 
 retval=$?
 test_status $retval "${TEST_NAME}"
diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c
index 506423201197..e7913444518d 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.c
+++ b/tools/testing/selftests/bpf/xdpxceiver.c
@@ -18,12 +18,7 @@
  * These selftests test AF_XDP SKB and Native/DRV modes using veth
  * Virtual Ethernet interfaces.
  *
- * The following tests are run:
- *
- * 1. AF_XDP SKB mode
- *    Generic mode XDP is driver independent, used when the driver does
- *    not have support for XDP. Works on any netdevice using sockets and
- *    generic XDP path. XDP hook from netif_receive_skb().
+ * For each mode, the following tests are run:
  *    a. nopoll - soft-irq processing
  *    b. poll - using poll() syscall
  *    c. Socket Teardown
@@ -34,17 +29,6 @@
  *       completion rings on each socket, tx/rx in both directions. Only nopoll
  *       mode is used
  *
- * 2. AF_XDP DRV/Native mode
- *    Works on any netdevice with XDP_REDIRECT support, driver dependent. Processes
- *    packets before SKB allocation. Provides better performance than SKB. Driver
- *    hook available just after DMA of buffer descriptor.
- *    a. nopoll
- *    b. poll
- *    c. Socket Teardown
- *    d. Bi-directional sockets
- *    - Only copy mode is supported because veth does not currently support
- *      zero-copy mode
- *
  * Total tests: 8
  *
  * Flow:
@@ -98,17 +82,23 @@ typedef __u16 __sum16;
 
 static void __exit_with_error(int error, const char *file, const char *func, int line)
 {
-	ksft_test_result_fail
-	    ("[%s:%s:%i]: ERROR: %d/\"%s\"\n", file, func, line, error, strerror(error));
-	ksft_exit_xfail();
+	if (configured_mode == TEST_MODE_UNCONFIGURED) {
+		ksft_exit_fail_msg
+		("[%s:%s:%i]: ERROR: %d/\"%s\"\n", file, func, line, error, strerror(error));
+	} else {
+		ksft_test_result_fail
+		("[%s:%s:%i]: ERROR: %d/\"%s\"\n", file, func, line, error, strerror(error));
+		ksft_exit_xfail();
+	}
 }
 
 #define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, __LINE__)
 
 #define print_ksft_result(void)\
-	(ksft_test_result_pass("PASS: %s %s %s%s\n", uut ? "DRV" : "SKB", opt_poll ? "POLL" :\
-			       "NOPOLL", opt_teardown ? "Socket Teardown" : "",\
-			       opt_bidi ? "Bi-directional Sockets" : ""))
+	(ksft_test_result_pass("PASS: %s %s %s%s\n", configured_mode ? "DRV" : "SKB",\
+			       test_type == TEST_TYPE_POLL ? "POLL" : "NOPOLL",\
+			       test_type == TEST_TYPE_TEARDOWN ? "Socket Teardown" : "",\
+			       test_type == TEST_TYPE_BIDI ? "Bi-directional Sockets" : ""))
 
 static void pthread_init_mutex(void)
 {
@@ -311,10 +301,10 @@ static int xsk_configure_socket(struct ifobject *ifobject)
 	cfg.rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS;
 	cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
 	cfg.libbpf_flags = 0;
-	cfg.xdp_flags = opt_xdp_flags;
-	cfg.bind_flags = opt_xdp_bind_flags;
+	cfg.xdp_flags = xdp_flags;
+	cfg.bind_flags = xdp_bind_flags;
 
-	if (!opt_bidi) {
+	if (test_type != TEST_TYPE_BIDI) {
 		rxr = (ifobject->fv.vector == rx) ? &ifobject->xsk->rx : NULL;
 		txr = (ifobject->fv.vector == tx) ? &ifobject->xsk->tx : NULL;
 	} else {
@@ -334,12 +324,6 @@ static int xsk_configure_socket(struct ifobject *ifobject)
 static struct option long_options[] = {
 	{"interface", required_argument, 0, 'i'},
 	{"queue", optional_argument, 0, 'q'},
-	{"poll", no_argument, 0, 'p'},
-	{"xdp-skb", no_argument, 0, 'S'},
-	{"xdp-native", no_argument, 0, 'N'},
-	{"copy", no_argument, 0, 'c'},
-	{"tear-down", no_argument, 0, 'T'},
-	{"bidi", optional_argument, 0, 'B'},
 	{"dump-pkts", optional_argument, 0, 'D'},
 	{"verbose", no_argument, 0, 'v'},
 	{"tx-pkt-count", optional_argument, 0, 'C'},
@@ -353,12 +337,6 @@ static void usage(const char *prog)
 	    "  Options:\n"
 	    "  -i, --interface      Use interface\n"
 	    "  -q, --queue=n        Use queue n (default 0)\n"
-	    "  -p, --poll           Use poll syscall\n"
-	    "  -S, --xdp-skb=n      Use XDP SKB mode\n"
-	    "  -N, --xdp-native=n   Enforce XDP DRV (native) mode\n"
-	    "  -c, --copy           Force copy mode\n"
-	    "  -T, --tear-down      Tear down sockets by repeatedly recreating them\n"
-	    "  -B, --bidi           Bi-directional sockets test\n"
 	    "  -D, --dump-pkts      Dump packets L2 - L5\n"
 	    "  -v, --verbose        Verbose output\n"
 	    "  -C, --tx-pkt-count=n Number of packets to send\n";
@@ -448,7 +426,7 @@ static void parse_command_line(int argc, char **argv)
 	opterr = 0;
 
 	for (;;) {
-		c = getopt_long(argc, argv, "i:q:pSNcTBDC:v", long_options, &option_index);
+		c = getopt_long(argc, argv, "i:q:DC:v", long_options, &option_index);
 
 		if (c == -1)
 			break;
@@ -471,28 +449,6 @@ static void parse_command_line(int argc, char **argv)
 		case 'q':
 			opt_queue = atoi(optarg);
 			break;
-		case 'p':
-			opt_poll = 1;
-			break;
-		case 'S':
-			opt_xdp_flags |= XDP_FLAGS_SKB_MODE;
-			opt_xdp_bind_flags |= XDP_COPY;
-			uut = ORDER_CONTENT_VALIDATE_XDP_SKB;
-			break;
-		case 'N':
-			opt_xdp_flags |= XDP_FLAGS_DRV_MODE;
-			opt_xdp_bind_flags |= XDP_COPY;
-			uut = ORDER_CONTENT_VALIDATE_XDP_DRV;
-			break;
-		case 'c':
-			opt_xdp_bind_flags |= XDP_COPY;
-			break;
-		case 'T':
-			opt_teardown = 1;
-			break;
-		case 'B':
-			opt_bidi = 1;
-			break;
 		case 'D':
 			debug_pkt_dump = 1;
 			break;
@@ -508,6 +464,11 @@ static void parse_command_line(int argc, char **argv)
 		}
 	}
 
+	if (!opt_pkt_count) {
+		print_verbose("No tx-pkt-count specified, using default %u\n", DEFAULT_PKT_CNT);
+		opt_pkt_count = DEFAULT_PKT_CNT;
+	}
+
 	if (!validate_interfaces()) {
 		usage(basename(argv[0]));
 		ksft_exit_xfail();
@@ -659,7 +620,7 @@ static void tx_only_all(struct ifobject *ifobject)
 	while ((opt_pkt_count && pkt_cnt < opt_pkt_count) || !opt_pkt_count) {
 		int batch_size = get_batch_size(pkt_cnt);
 
-		if (opt_poll) {
+		if (test_type == TEST_TYPE_POLL) {
 			ret = poll(fds, 1, POLL_TMOUT);
 			if (ret <= 0)
 				continue;
@@ -883,7 +844,7 @@ static void *worker_testapp_validate(void *arg)
 		pthread_mutex_unlock(&sync_mutex);
 
 		while (1) {
-			if (opt_poll) {
+			if (test_type == TEST_TYPE_POLL) {
 				ret = poll(fds, 1, POLL_TMOUT);
 				if (ret <= 0)
 					continue;
@@ -898,11 +859,11 @@ static void *worker_testapp_validate(void *arg)
 		print_verbose("Received %d packets on interface %s\n",
 			       pkt_counter, ifobject->ifname);
 
-		if (opt_teardown)
+		if (test_type == TEST_TYPE_TEARDOWN)
 			print_verbose("Destroying socket\n");
 	}
 
-	if (!opt_bidi || bidi_pass) {
+	if ((test_type != TEST_TYPE_BIDI) || bidi_pass) {
 		xsk_socket__delete(ifobject->xsk->xsk);
 		(void)xsk_umem__delete(ifobject->umem->umem);
 	}
@@ -912,11 +873,12 @@ static void *worker_testapp_validate(void *arg)
 static void testapp_validate(void)
 {
 	struct timespec max_wait = { 0, 0 };
+	bool bidi = test_type == TEST_TYPE_BIDI;
 
 	pthread_attr_init(&attr);
 	pthread_attr_setstacksize(&attr, THREAD_STACK);
 
-	if (opt_bidi && bidi_pass) {
+	if ((test_type == TEST_TYPE_BIDI) && bidi_pass) {
 		pthread_init_mutex();
 		if (!switching_notify) {
 			print_verbose("Switching Tx/Rx vectors\n");
@@ -927,10 +889,10 @@ static void testapp_validate(void)
 	pthread_mutex_lock(&sync_mutex);
 
 	/*Spawn RX thread */
-	if (!opt_bidi || !bidi_pass) {
+	if (!bidi || !bidi_pass) {
 		if (pthread_create(&t0, &attr, worker_testapp_validate, ifdict[1]))
 			exit_with_error(errno);
-	} else if (opt_bidi && bidi_pass) {
+	} else if (bidi && bidi_pass) {
 		/*switch Tx/Rx vectors */
 		ifdict[0]->fv.vector = rx;
 		if (pthread_create(&t0, &attr, worker_testapp_validate, ifdict[0]))
@@ -947,10 +909,10 @@ static void testapp_validate(void)
 	pthread_mutex_unlock(&sync_mutex);
 
 	/*Spawn TX thread */
-	if (!opt_bidi || !bidi_pass) {
+	if (!bidi || !bidi_pass) {
 		if (pthread_create(&t1, &attr, worker_testapp_validate, ifdict[0]))
 			exit_with_error(errno);
-	} else if (opt_bidi && bidi_pass) {
+	} else if (bidi && bidi_pass) {
 		/*switch Tx/Rx vectors */
 		ifdict[1]->fv.vector = tx;
 		if (pthread_create(&t1, &attr, worker_testapp_validate, ifdict[1]))
@@ -969,19 +931,20 @@ static void testapp_validate(void)
 		free(pkt_buf);
 	}
 
-	if (!opt_teardown && !opt_bidi)
+	if (!(test_type == TEST_TYPE_TEARDOWN) && !bidi)
 		print_ksft_result();
 }
 
 static void testapp_sockets(void)
 {
-	for (int i = 0; i < (opt_teardown ? MAX_TEARDOWN_ITER : MAX_BIDI_ITER); i++) {
+	for (int i = 0; i < ((test_type == TEST_TYPE_TEARDOWN) ? MAX_TEARDOWN_ITER : MAX_BIDI_ITER);
+	     i++) {
 		pkt_counter = 0;
 		prev_pkt = -1;
 		sigvar = 0;
 		print_verbose("Creating socket\n");
 		testapp_validate();
-		opt_bidi ? bidi_pass++ : bidi_pass;
+		test_type == TEST_TYPE_BIDI ? bidi_pass++ : bidi_pass;
 	}
 
 	print_ksft_result();
@@ -1008,6 +971,98 @@ static void init_iface_config(struct ifaceconfigobj *ifaceconfig)
 	ifdict[1]->src_port = ifaceconfig->dst_port;
 }
 
+static void *nsdisablemodethread(void *args)
+{
+	struct targs *targs = args;
+
+	targs->retptr = false;
+
+	if (switch_namespace(targs->idx)) {
+		targs->retptr = bpf_set_link_xdp_fd(ifdict[targs->idx]->ifindex, -1, targs->flags);
+	} else {
+		targs->retptr = errno;
+		print_verbose("Failed to switch namespace to %s\n", ifdict[targs->idx]->nsname);
+	}
+
+	pthread_exit(NULL);
+}
+
+static void disable_xdp_mode(int mode)
+{
+	int err = 0;
+	__u32 flags = XDP_FLAGS_UPDATE_IF_NOEXIST | mode;
+	char *mode_str = mode & XDP_FLAGS_SKB_MODE ? "skb" : "drv";
+
+	for (int i = 0; i < MAX_INTERFACES; i++) {
+		if (strcmp(ifdict[i]->nsname, "")) {
+			struct targs *targs;
+
+			targs = malloc(sizeof(*targs));
+			memset(targs, 0, sizeof(*targs));
+			if (!targs)
+				exit_with_error(errno);
+
+			targs->idx = i;
+			targs->flags = flags;
+			if (pthread_create(&ns_thread, NULL, nsdisablemodethread, targs))
+				exit_with_error(errno);
+
+			pthread_join(ns_thread, NULL);
+			err = targs->retptr;
+			free(targs);
+		} else {
+			err = bpf_set_link_xdp_fd(ifdict[i]->ifindex, -1, flags);
+		}
+
+		if (err) {
+			print_verbose("Failed to disable %s mode on interface %s\n",
+						mode_str, ifdict[i]->ifname);
+			exit_with_error(err);
+		}
+
+		print_verbose("Disabled %s mode for interface: %s\n", mode_str, ifdict[i]->ifname);
+		configured_mode = mode & XDP_FLAGS_SKB_MODE ? TEST_MODE_DRV : TEST_MODE_SKB;
+	}
+}
+
+static void run_pkt_test(int mode, int type)
+{
+	test_type = type;
+
+	/* reset defaults after potential previous test */
+	xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
+	pkt_counter = 0;
+	switching_notify = 0;
+	bidi_pass = 0;
+	prev_pkt = -1;
+	ifdict[0]->fv.vector = tx;
+	ifdict[1]->fv.vector = rx;
+
+	switch (mode) {
+	case (TEST_MODE_SKB):
+		if (configured_mode == TEST_MODE_DRV)
+			disable_xdp_mode(XDP_FLAGS_DRV_MODE);
+		xdp_flags |= XDP_FLAGS_SKB_MODE;
+		break;
+	case (TEST_MODE_DRV):
+		if (configured_mode == TEST_MODE_SKB)
+			disable_xdp_mode(XDP_FLAGS_SKB_MODE);
+		xdp_flags |= XDP_FLAGS_DRV_MODE;
+		break;
+	default:
+		break;
+	}
+
+	pthread_init_mutex();
+
+	if ((test_type != TEST_TYPE_TEARDOWN) && (test_type != TEST_TYPE_BIDI))
+		testapp_validate();
+	else
+		testapp_sockets();
+
+	pthread_destroy_mutex();
+}
+
 int main(int argc, char **argv)
 {
 	struct rlimit _rlim = { RLIM_INFINITY, RLIM_INFINITY };
@@ -1021,6 +1076,7 @@ int main(int argc, char **argv)
 	const char *IP2 = "192.168.100.161";
 	u16 UDP_DST_PORT = 2020;
 	u16 UDP_SRC_PORT = 2121;
+	int i, j;
 
 	ifaceconfig = malloc(sizeof(struct ifaceconfigobj));
 	memcpy(ifaceconfig->dst_mac, MAC1, ETH_ALEN);
@@ -1046,24 +1102,18 @@ int main(int argc, char **argv)
 
 	init_iface_config(ifaceconfig);
 
-	pthread_init_mutex();
+	disable_xdp_mode(XDP_FLAGS_DRV_MODE);
 
-	ksft_set_plan(1);
+	ksft_set_plan(TEST_MODE_MAX * TEST_TYPE_MAX);
 
-	if (!opt_teardown && !opt_bidi) {
-		testapp_validate();
-	} else if (opt_teardown && opt_bidi) {
-		ksft_test_result_fail("ERROR: parameters -T and -B cannot be used together\n");
-		ksft_exit_xfail();
-	} else {
-		testapp_sockets();
+	for (i = 0; i < TEST_MODE_MAX; i++) {
+		for (j = 0; j < TEST_TYPE_MAX; j++)
+			run_pkt_test(i, j);
 	}
 
 	for (int i = 0; i < MAX_INTERFACES; i++)
 		free(ifdict[i]);
 
-	pthread_destroy_mutex();
-
 	ksft_exit_pass();
 
 	return 0;
diff --git a/tools/testing/selftests/bpf/xdpxceiver.h b/tools/testing/selftests/bpf/xdpxceiver.h
index f66f399dfb2d..e05703f661f8 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.h
+++ b/tools/testing/selftests/bpf/xdpxceiver.h
@@ -41,6 +41,7 @@
 #define BATCH_SIZE 64
 #define POLL_TMOUT 1000
 #define NEED_WAKEUP true
+#define DEFAULT_PKT_CNT 10000
 
 #define print_verbose(x...) do { if (opt_verbose) ksft_print_msg(x); } while (0)
 
@@ -48,28 +49,37 @@ typedef __u32 u32;
 typedef __u16 u16;
 typedef __u8 u8;
 
-enum TESTS {
-	ORDER_CONTENT_VALIDATE_XDP_SKB = 0,
-	ORDER_CONTENT_VALIDATE_XDP_DRV = 1,
+enum TEST_MODES {
+	TEST_MODE_UNCONFIGURED = -1,
+	TEST_MODE_SKB,
+	TEST_MODE_DRV,
+	TEST_MODE_MAX
 };
 
-static u8 uut;
+enum TEST_TYPES {
+	TEST_TYPE_NOPOLL,
+	TEST_TYPE_POLL,
+	TEST_TYPE_TEARDOWN,
+	TEST_TYPE_BIDI,
+	TEST_TYPE_MAX
+};
+
+static int configured_mode = TEST_MODE_UNCONFIGURED;
 static u8 debug_pkt_dump;
 static u32 num_frames;
 static u8 switching_notify;
 static u8 bidi_pass;
+static int test_type;
 
-static u32 opt_xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
 static int opt_queue;
 static int opt_pkt_count;
-static int opt_poll;
-static int opt_teardown;
-static int opt_bidi;
-static u32 opt_xdp_bind_flags = XDP_USE_NEED_WAKEUP;
 static u8 opt_verbose;
+
+static u32 xdp_flags = XDP_FLAGS_UPDATE_IF_NOEXIST;
+static u32 xdp_bind_flags = XDP_USE_NEED_WAKEUP | XDP_COPY;
 static u8 pkt_data[XSK_UMEM__DEFAULT_FRAME_SIZE];
 static u32 pkt_counter;
-static u32 prev_pkt = -1;
+static long prev_pkt = -1;
 static int sigvar;
 
 struct xsk_umem_info {
@@ -140,8 +150,9 @@ pthread_t t0, t1, ns_thread;
 pthread_attr_t attr;
 
 struct targs {
-	bool retptr;
+	u8 retptr;
 	int idx;
+	u32 flags;
 };
 
 TAILQ_HEAD(head_s, pkt) head = TAILQ_HEAD_INITIALIZER(head);
diff --git a/tools/testing/selftests/bpf/xsk_prereqs.sh b/tools/testing/selftests/bpf/xsk_prereqs.sh
index da93575d757a..dac1c5f78752 100755
--- a/tools/testing/selftests/bpf/xsk_prereqs.sh
+++ b/tools/testing/selftests/bpf/xsk_prereqs.sh
@@ -105,29 +105,7 @@ validate_ip_utility()
 	[ ! $(type -P ip) ] && { echo "'ip' not found. Skipping tests."; test_exit $ksft_skip 1; }
 }
 
-vethXDPgeneric()
-{
-	ip link set dev $1 xdpdrv off
-	ip netns exec $3 ip link set dev $2 xdpdrv off
-}
-
-vethXDPnative()
-{
-	ip link set dev $1 xdpgeneric off
-	ip netns exec $3 ip link set dev $2 xdpgeneric off
-}
-
 execxdpxceiver()
 {
-	local -a 'paramkeys=("${!'"$1"'[@]}")' copy
-	paramkeysstr=${paramkeys[*]}
-
-	for index in $paramkeysstr;
-		do
-			current=$1"[$index]"
-			copy[$index]=${!current}
-		done
-
-	./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} ${copy[*]} -C ${NUMPKTS} ${VERBOSE_ARG} \
-		${DUMP_PKTS_ARG}
+	./${XSKOBJ} -i ${VETH0} -i ${VETH1},${NS1} -C ${NUMPKTS} ${VERBOSE_ARG} ${DUMP_PKTS_ARG}
 }
-- 
2.17.1


^ permalink raw reply	[flat|nested] 5+ messages in thread

* [PATCH bpf-next v3 4/4] selftests/bpf: introduce xsk statistics tests
  2021-02-23 16:23 [PATCH bpf-next v3 0/4] selftests/bpf: xsk improvements and new stats tests Ciara Loftus
                   ` (2 preceding siblings ...)
  2021-02-23 16:23 ` [PATCH bpf-next v3 3/4] selftests/bpf: restructure xsk selftests Ciara Loftus
@ 2021-02-23 16:23 ` Ciara Loftus
  3 siblings, 0 replies; 5+ messages in thread
From: Ciara Loftus @ 2021-02-23 16:23 UTC (permalink / raw)
  To: netdev, bpf, magnus.karlsson, bjorn, weqaar.a.janjua, maciej.fijalkowski
  Cc: Ciara Loftus

This commit introduces a range of tests to the xsk testsuite
for validating xsk statistics.

A new test type called 'stats' is added. Within it there are
four sub-tests. Each test configures a scenario which should
trigger the given error statistic. The test passes if the statistic
is successfully incremented.

The four statistics for which tests have been created are:
1. rx dropped
Increase the UMEM frame headroom to a value which results in
insufficient space in the rx buffer for both the packet and the headroom.
2. tx invalid
Set the 'len' field of tx descriptors to an invalid value (umem frame
size + 1).
3. rx ring full
Reduce the size of the RX ring to a fraction of the fill ring size.
4. fill queue empty
Do not populate the fill queue and then try to receive pkts.

Signed-off-by: Ciara Loftus <ciara.loftus@intel.com>
Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
---
 tools/testing/selftests/bpf/xdpxceiver.c | 137 ++++++++++++++++++++---
 tools/testing/selftests/bpf/xdpxceiver.h |  13 +++
 2 files changed, 136 insertions(+), 14 deletions(-)

diff --git a/tools/testing/selftests/bpf/xdpxceiver.c b/tools/testing/selftests/bpf/xdpxceiver.c
index e7913444518d..8b0f7fdd9003 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.c
+++ b/tools/testing/selftests/bpf/xdpxceiver.c
@@ -28,8 +28,21 @@
  *       Configure sockets as bi-directional tx/rx sockets, sets up fill and
  *       completion rings on each socket, tx/rx in both directions. Only nopoll
  *       mode is used
+ *    e. Statistics
+ *       Trigger some error conditions and ensure that the appropriate statistics
+ *       are incremented. Within this test, the following statistics are tested:
+ *       i.   rx dropped
+ *            Increase the UMEM frame headroom to a value which results in
+ *            insufficient space in the rx buffer for both the packet and the headroom.
+ *       ii.  tx invalid
+ *            Set the 'len' field of tx descriptors to an invalid value (umem frame
+ *            size + 1).
+ *       iii. rx ring full
+ *            Reduce the size of the RX ring to a fraction of the fill ring size.
+ *       iv.  fill queue empty
+ *            Do not populate the fill queue and then try to receive pkts.
  *
- * Total tests: 8
+ * Total tests: 10
  *
  * Flow:
  * -----
@@ -95,10 +108,11 @@ static void __exit_with_error(int error, const char *file, const char *func, int
 #define exit_with_error(error) __exit_with_error(error, __FILE__, __func__, __LINE__)
 
 #define print_ksft_result(void)\
-	(ksft_test_result_pass("PASS: %s %s %s%s\n", configured_mode ? "DRV" : "SKB",\
+	(ksft_test_result_pass("PASS: %s %s %s%s%s\n", configured_mode ? "DRV" : "SKB",\
 			       test_type == TEST_TYPE_POLL ? "POLL" : "NOPOLL",\
 			       test_type == TEST_TYPE_TEARDOWN ? "Socket Teardown" : "",\
-			       test_type == TEST_TYPE_BIDI ? "Bi-directional Sockets" : ""))
+			       test_type == TEST_TYPE_BIDI ? "Bi-directional Sockets" : "",\
+			       test_type == TEST_TYPE_STATS ? "Stats" : ""))
 
 static void pthread_init_mutex(void)
 {
@@ -260,13 +274,20 @@ static void gen_eth_frame(struct xsk_umem_info *umem, u64 addr)
 static void xsk_configure_umem(struct ifobject *data, void *buffer, u64 size)
 {
 	int ret;
+	struct xsk_umem_config cfg = {
+		.fill_size = XSK_RING_PROD__DEFAULT_NUM_DESCS,
+		.comp_size = XSK_RING_CONS__DEFAULT_NUM_DESCS,
+		.frame_size = XSK_UMEM__DEFAULT_FRAME_SIZE,
+		.frame_headroom = frame_headroom,
+		.flags = XSK_UMEM__DEFAULT_FLAGS
+	};
 
 	data->umem = calloc(1, sizeof(struct xsk_umem_info));
 	if (!data->umem)
 		exit_with_error(errno);
 
 	ret = xsk_umem__create(&data->umem->umem, buffer, size,
-			       &data->umem->fq, &data->umem->cq, NULL);
+			       &data->umem->fq, &data->umem->cq, &cfg);
 	if (ret)
 		exit_with_error(ret);
 
@@ -298,7 +319,7 @@ static int xsk_configure_socket(struct ifobject *ifobject)
 		exit_with_error(errno);
 
 	ifobject->xsk->umem = ifobject->umem;
-	cfg.rx_size = XSK_RING_CONS__DEFAULT_NUM_DESCS;
+	cfg.rx_size = rxqsize;
 	cfg.tx_size = XSK_RING_PROD__DEFAULT_NUM_DESCS;
 	cfg.libbpf_flags = 0;
 	cfg.xdp_flags = xdp_flags;
@@ -565,6 +586,8 @@ static void tx_only(struct xsk_socket_info *xsk, u32 *frameptr, int batch_size)
 {
 	u32 idx;
 	unsigned int i;
+	bool tx_invalid_test = stat_test_type == STAT_TEST_TX_INVALID;
+	u32 len = tx_invalid_test ? XSK_UMEM__DEFAULT_FRAME_SIZE + 1 : PKT_SIZE;
 
 	while (xsk_ring_prod__reserve(&xsk->tx, batch_size, &idx) < batch_size)
 		complete_tx_only(xsk, batch_size);
@@ -573,11 +596,16 @@ static void tx_only(struct xsk_socket_info *xsk, u32 *frameptr, int batch_size)
 		struct xdp_desc *tx_desc = xsk_ring_prod__tx_desc(&xsk->tx, idx + i);
 
 		tx_desc->addr = (*frameptr + i) << XSK_UMEM__DEFAULT_FRAME_SHIFT;
-		tx_desc->len = PKT_SIZE;
+		tx_desc->len = len;
 	}
 
 	xsk_ring_prod__submit(&xsk->tx, batch_size);
-	xsk->outstanding_tx += batch_size;
+	if (!tx_invalid_test) {
+		xsk->outstanding_tx += batch_size;
+	} else {
+		if (!NEED_WAKEUP || xsk_ring_prod__needs_wakeup(&xsk->tx))
+			kick_tx(xsk);
+	}
 	*frameptr += batch_size;
 	*frameptr %= num_frames;
 	complete_tx_only(xsk, batch_size);
@@ -689,6 +717,48 @@ static void worker_pkt_dump(void)
 	}
 }
 
+static void worker_stats_validate(struct ifobject *ifobject)
+{
+	struct xdp_statistics stats;
+	socklen_t optlen;
+	int err;
+	struct xsk_socket *xsk = stat_test_type == STAT_TEST_TX_INVALID ?
+							ifdict[!ifobject->ifdict_index]->xsk->xsk :
+							ifobject->xsk->xsk;
+	int fd = xsk_socket__fd(xsk);
+	unsigned long xsk_stat = 0, expected_stat = opt_pkt_count;
+
+	sigvar = 0;
+
+	optlen = sizeof(stats);
+	err = getsockopt(fd, SOL_XDP, XDP_STATISTICS, &stats, &optlen);
+	if (err)
+		return;
+
+	if (optlen == sizeof(struct xdp_statistics)) {
+		switch (stat_test_type) {
+		case STAT_TEST_RX_DROPPED:
+			xsk_stat = stats.rx_dropped;
+			break;
+		case STAT_TEST_TX_INVALID:
+			xsk_stat = stats.tx_invalid_descs;
+			break;
+		case STAT_TEST_RX_FULL:
+			xsk_stat = stats.rx_ring_full;
+			expected_stat -= RX_FULL_RXQSIZE;
+			break;
+		case STAT_TEST_RX_FILL_EMPTY:
+			xsk_stat = stats.rx_fill_ring_empty_descs;
+			break;
+		default:
+			break;
+		}
+
+		if (xsk_stat == expected_stat)
+			sigvar = 1;
+	}
+}
+
 static void worker_pkt_validate(void)
 {
 	u32 payloadseqnum = -2;
@@ -827,7 +897,8 @@ static void *worker_testapp_validate(void *arg)
 			thread_common_ops(ifobject, bufs, &sync_mutex_tx, &spinning_rx);
 
 		print_verbose("Interface [%s] vector [Rx]\n", ifobject->ifname);
-		xsk_populate_fill_ring(ifobject->umem);
+		if (stat_test_type != STAT_TEST_RX_FILL_EMPTY)
+			xsk_populate_fill_ring(ifobject->umem);
 
 		TAILQ_INIT(&head);
 		if (debug_pkt_dump) {
@@ -849,15 +920,21 @@ static void *worker_testapp_validate(void *arg)
 				if (ret <= 0)
 					continue;
 			}
-			rx_pkt(ifobject->xsk, fds);
-			worker_pkt_validate();
+
+			if (test_type != TEST_TYPE_STATS) {
+				rx_pkt(ifobject->xsk, fds);
+				worker_pkt_validate();
+			} else {
+				worker_stats_validate(ifobject);
+			}
 
 			if (sigvar)
 				break;
 		}
 
-		print_verbose("Received %d packets on interface %s\n",
-			       pkt_counter, ifobject->ifname);
+		if (test_type != TEST_TYPE_STATS)
+			print_verbose("Received %d packets on interface %s\n",
+				pkt_counter, ifobject->ifname);
 
 		if (test_type == TEST_TYPE_TEARDOWN)
 			print_verbose("Destroying socket\n");
@@ -931,7 +1008,7 @@ static void testapp_validate(void)
 		free(pkt_buf);
 	}
 
-	if (!(test_type == TEST_TYPE_TEARDOWN) && !bidi)
+	if (!(test_type == TEST_TYPE_TEARDOWN) && !bidi && !(test_type == TEST_TYPE_STATS))
 		print_ksft_result();
 }
 
@@ -950,6 +1027,32 @@ static void testapp_sockets(void)
 	print_ksft_result();
 }
 
+static void testapp_stats(void)
+{
+	for (int i = 0; i < STAT_TEST_TYPE_MAX; i++) {
+		stat_test_type = i;
+
+		/* reset defaults */
+		rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS;
+		frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM;
+
+		switch (stat_test_type) {
+		case STAT_TEST_RX_DROPPED:
+			frame_headroom = XSK_UMEM__DEFAULT_FRAME_SIZE -
+						XDP_PACKET_HEADROOM - 1;
+			break;
+		case STAT_TEST_RX_FULL:
+			rxqsize = RX_FULL_RXQSIZE;
+			break;
+		default:
+			break;
+		}
+		testapp_validate();
+	}
+
+	print_ksft_result();
+}
+
 static void init_iface_config(struct ifaceconfigobj *ifaceconfig)
 {
 	/*Init interface0 */
@@ -1037,6 +1140,10 @@ static void run_pkt_test(int mode, int type)
 	prev_pkt = -1;
 	ifdict[0]->fv.vector = tx;
 	ifdict[1]->fv.vector = rx;
+	sigvar = 0;
+	stat_test_type = -1;
+	rxqsize = XSK_RING_CONS__DEFAULT_NUM_DESCS;
+	frame_headroom = XSK_UMEM__DEFAULT_FRAME_HEADROOM;
 
 	switch (mode) {
 	case (TEST_MODE_SKB):
@@ -1055,7 +1162,9 @@ static void run_pkt_test(int mode, int type)
 
 	pthread_init_mutex();
 
-	if ((test_type != TEST_TYPE_TEARDOWN) && (test_type != TEST_TYPE_BIDI))
+	if (test_type == TEST_TYPE_STATS)
+		testapp_stats();
+	else if ((test_type != TEST_TYPE_TEARDOWN) && (test_type != TEST_TYPE_BIDI))
 		testapp_validate();
 	else
 		testapp_sockets();
diff --git a/tools/testing/selftests/bpf/xdpxceiver.h b/tools/testing/selftests/bpf/xdpxceiver.h
index e05703f661f8..30314ef305c2 100644
--- a/tools/testing/selftests/bpf/xdpxceiver.h
+++ b/tools/testing/selftests/bpf/xdpxceiver.h
@@ -42,6 +42,7 @@
 #define POLL_TMOUT 1000
 #define NEED_WAKEUP true
 #define DEFAULT_PKT_CNT 10000
+#define RX_FULL_RXQSIZE 32
 
 #define print_verbose(x...) do { if (opt_verbose) ksft_print_msg(x); } while (0)
 
@@ -61,9 +62,18 @@ enum TEST_TYPES {
 	TEST_TYPE_POLL,
 	TEST_TYPE_TEARDOWN,
 	TEST_TYPE_BIDI,
+	TEST_TYPE_STATS,
 	TEST_TYPE_MAX
 };
 
+enum STAT_TEST_TYPES {
+	STAT_TEST_RX_DROPPED,
+	STAT_TEST_TX_INVALID,
+	STAT_TEST_RX_FULL,
+	STAT_TEST_RX_FILL_EMPTY,
+	STAT_TEST_TYPE_MAX
+};
+
 static int configured_mode = TEST_MODE_UNCONFIGURED;
 static u8 debug_pkt_dump;
 static u32 num_frames;
@@ -81,6 +91,9 @@ static u8 pkt_data[XSK_UMEM__DEFAULT_FRAME_SIZE];
 static u32 pkt_counter;
 static long prev_pkt = -1;
 static int sigvar;
+static int stat_test_type;
+static u32 rxqsize;
+static u32 frame_headroom;
 
 struct xsk_umem_info {
 	struct xsk_ring_prod fq;
-- 
2.17.1


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-- links below jump to the message on this page --
2021-02-23 16:23 [PATCH bpf-next v3 0/4] selftests/bpf: xsk improvements and new stats tests Ciara Loftus
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2021-02-23 16:23 ` [PATCH bpf-next v3 3/4] selftests/bpf: restructure xsk selftests Ciara Loftus
2021-02-23 16:23 ` [PATCH bpf-next v3 4/4] selftests/bpf: introduce xsk statistics tests Ciara Loftus

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