selftests/bpf: test_xsk: Isolate non-CI tests

Following tests won't fit in the CI:
- XDP_ADJUST_TAIL_* and SEND_RECEIVE_9K_PACKETS because of their
  flakyness
- UNALIGNED_* because they depend on huge page allocations
- *_RING_SIZE because they depend on HW rings
- TEARDOWN because it's too long

Remove these tests from the nominal tests table so they won't be
run by the CI in upcoming patch.
Create a skip_ci_tests table to hold them.
Use this skip_ci table in xskxceiver.c to keep all the tests available
from the test_xsk.sh script.

Reviewed-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Bastien Curutchet (eBPF Foundation) <bastien.curutchet@bootlin.com>
Link: https://lore.kernel.org/r/20251031-xsk-v7-14-39fe486593a3@bootlin.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>

tools/testing/selftests/bpf/test_xsk.h

@@ -254,14 +254,9 @@ static const struct test_spec tests[] = {
 	{.name = "POLL_TX", .test_func = testapp_poll_tx},
 	{.name = "POLL_RXQ_FULL", .test_func = testapp_poll_rxq_tmout},
 	{.name = "POLL_TXQ_FULL", .test_func = testapp_poll_txq_tmout},
-	{.name = "SEND_RECEIVE_UNALIGNED", .test_func = testapp_send_receive_unaligned},
 	{.name = "ALIGNED_INV_DESC", .test_func = testapp_aligned_inv_desc},
 	{.name = "ALIGNED_INV_DESC_2K_FRAME_SIZE", .test_func = testapp_aligned_inv_desc_2k_frame},
-	{.name = "UNALIGNED_INV_DESC", .test_func = testapp_unaligned_inv_desc},
-	{.name = "UNALIGNED_INV_DESC_4001_FRAME_SIZE",
-	 .test_func = testapp_unaligned_inv_desc_4001_frame},
 	{.name = "UMEM_HEADROOM", .test_func = testapp_headroom},
-	{.name = "TEARDOWN", .test_func = testapp_teardown},
 	{.name = "BIDIRECTIONAL", .test_func = testapp_bidirectional},
 	{.name = "STAT_RX_DROPPED", .test_func = testapp_stats_rx_dropped},
 	{.name = "STAT_TX_INVALID", .test_func = testapp_stats_tx_invalid_descs},
@@ -272,19 +267,32 @@ static const struct test_spec tests[] = {
 	{.name = "XDP_SHARED_UMEM", .test_func = testapp_xdp_shared_umem},
 	{.name = "XDP_METADATA_COPY", .test_func = testapp_xdp_metadata},
 	{.name = "XDP_METADATA_COPY_MULTI_BUFF", .test_func = testapp_xdp_metadata_mb},
-	{.name = "SEND_RECEIVE_9K_PACKETS", .test_func = testapp_send_receive_mb},
-	{.name = "SEND_RECEIVE_UNALIGNED_9K_PACKETS",
-	 .test_func = testapp_send_receive_unaligned_mb},
 	{.name = "ALIGNED_INV_DESC_MULTI_BUFF", .test_func = testapp_aligned_inv_desc_mb},
-	{.name = "UNALIGNED_INV_DESC_MULTI_BUFF", .test_func = testapp_unaligned_inv_desc_mb},
 	{.name = "TOO_MANY_FRAGS", .test_func = testapp_too_many_frags},
-	{.name = "HW_SW_MIN_RING_SIZE", .test_func = testapp_hw_sw_min_ring_size},
-	{.name = "HW_SW_MAX_RING_SIZE", .test_func = testapp_hw_sw_max_ring_size},
 	{.name = "XDP_ADJUST_TAIL_SHRINK", .test_func = testapp_adjust_tail_shrink},
-	{.name = "XDP_ADJUST_TAIL_SHRINK_MULTI_BUFF", .test_func = testapp_adjust_tail_shrink_mb},
-	{.name = "XDP_ADJUST_TAIL_GROW", .test_func = testapp_adjust_tail_grow},
-	{.name = "XDP_ADJUST_TAIL_GROW_MULTI_BUFF", .test_func = testapp_adjust_tail_grow_mb},
 	{.name = "TX_QUEUE_CONSUMER", .test_func = testapp_tx_queue_consumer},
 	};
 
+static const struct test_spec ci_skip_tests[] = {
+	/* Flaky tests */
+	{.name = "XDP_ADJUST_TAIL_SHRINK_MULTI_BUFF", .test_func = testapp_adjust_tail_shrink_mb},
+	{.name = "XDP_ADJUST_TAIL_GROW", .test_func = testapp_adjust_tail_grow},
+	{.name = "XDP_ADJUST_TAIL_GROW_MULTI_BUFF", .test_func = testapp_adjust_tail_grow_mb},
+	{.name = "SEND_RECEIVE_9K_PACKETS", .test_func = testapp_send_receive_mb},
+	/* Tests with huge page dependency */
+	{.name = "SEND_RECEIVE_UNALIGNED", .test_func = testapp_send_receive_unaligned},
+	{.name = "UNALIGNED_INV_DESC", .test_func = testapp_unaligned_inv_desc},
+	{.name = "UNALIGNED_INV_DESC_4001_FRAME_SIZE",
+	 .test_func = testapp_unaligned_inv_desc_4001_frame},
+	{.name = "SEND_RECEIVE_UNALIGNED_9K_PACKETS",
+	 .test_func = testapp_send_receive_unaligned_mb},
+	{.name = "UNALIGNED_INV_DESC_MULTI_BUFF", .test_func = testapp_unaligned_inv_desc_mb},
+	/* Test with HW ring size dependency */
+	{.name = "HW_SW_MIN_RING_SIZE", .test_func = testapp_hw_sw_min_ring_size},
+	{.name = "HW_SW_MAX_RING_SIZE", .test_func = testapp_hw_sw_max_ring_size},
+	/* Too long test */
+	{.name = "TEARDOWN", .test_func = testapp_teardown},
+};
+
+
 #endif				/* TEST_XSK_H_ */

tools/testing/selftests/bpf/xskxceiver.c

@@ -326,10 +326,13 @@ static void print_tests(void)
 	printf("Tests:\n");
 	for (i = 0; i < ARRAY_SIZE(tests); i++)
 		printf("%u: %s\n", i, tests[i].name);
+	for (i = ARRAY_SIZE(tests); i < ARRAY_SIZE(tests) + ARRAY_SIZE(ci_skip_tests); i++)
+		printf("%u: %s\n", i, ci_skip_tests[i - ARRAY_SIZE(tests)].name);
 }
 
 int main(int argc, char **argv)
 {
+	const size_t total_tests = ARRAY_SIZE(tests) + ARRAY_SIZE(ci_skip_tests);
 	struct pkt_stream *rx_pkt_stream_default;
 	struct pkt_stream *tx_pkt_stream_default;
 	struct ifobject *ifobj_tx, *ifobj_rx;
@@ -357,7 +360,7 @@ int main(int argc, char **argv)
 		print_tests();
 		ksft_exit_xpass();
 	}
-	if (opt_run_test != RUN_ALL_TESTS && opt_run_test >= ARRAY_SIZE(tests)) {
+	if (opt_run_test != RUN_ALL_TESTS && opt_run_test >= total_tests) {
 		ksft_print_msg("Error: test %u does not exist.\n", opt_run_test);
 		ksft_exit_xfail();
 	}
@@ -397,7 +400,7 @@ int main(int argc, char **argv)
 	test.rx_pkt_stream_default = rx_pkt_stream_default;
 
 	if (opt_run_test == RUN_ALL_TESTS)
-		nb_tests = ARRAY_SIZE(tests);
+		nb_tests = total_tests;
 	else
 		nb_tests = 1;
 	if (opt_mode == TEST_MODE_ALL) {
@@ -419,11 +422,15 @@ int main(int argc, char **argv)
 		if (opt_mode != TEST_MODE_ALL && i != opt_mode)
 			continue;
 
-		for (j = 0; j < ARRAY_SIZE(tests); j++) {
+		for (j = 0; j < total_tests; j++) {
 			if (opt_run_test != RUN_ALL_TESTS && j != opt_run_test)
 				continue;
 
+			if (j < ARRAY_SIZE(tests))
 				test_init(&test, ifobj_tx, ifobj_rx, i, &tests[j]);
+			else
+				test_init(&test, ifobj_tx, ifobj_rx, i,
+					  &ci_skip_tests[j - ARRAY_SIZE(tests)]);
 			run_pkt_test(&test);
 			usleep(USLEEP_MAX);