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selftests: xsk: Add test UNALIGNED_INV_DESC_4K1_FRAME_SIZE

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Add unaligned descriptor test for frame size of 4001. Using an odd frame
size ensures that the end of the UMEM is not near a page boundary. This
allows testing descriptors that staddle the end of the UMEM but not a
page.

This test used to fail without the previous commit ("xsk: Fix unaligned
descriptor validation").

Signed-off-by: Kal Conley <kal.conley@dectris.com>
Link: https://lore.kernel.org/r/20230405235920.7305-3-kal.conley@dectris.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
This commit is contained in:
Kal Conley 2023-04-06 01:59:19 +02:00 committed by Martin KaFai Lau
parent d769ccaf95
commit c0801598e5
2 changed files with 25 additions and 0 deletions
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24
tools/testing/selftests/bpf/xskxceiver.c
View File

@ -69,6 +69,7 @@
*/ */
#define _GNU_SOURCE #define _GNU_SOURCE
#include <assert.h>
#include <fcntl.h> #include <fcntl.h>
#include <errno.h> #include <errno.h>
#include <getopt.h> #include <getopt.h>
@ -1876,6 +1877,29 @@ static void run_pkt_test(struct test_spec *test, enum test_mode mode, enum test_
test->ifobj_rx->umem->unaligned_mode = true; test->ifobj_rx->umem->unaligned_mode = true;
testapp_invalid_desc(test); testapp_invalid_desc(test);
break; break;
case TEST_TYPE_UNALIGNED_INV_DESC_4K1_FRAME: {
u64 page_size, umem_size;
if (!hugepages_present(test->ifobj_tx)) {
ksft_test_result_skip("No 2M huge pages present.\n");
return;
}
test_spec_set_name(test, "UNALIGNED_INV_DESC_4K1_FRAME_SIZE");
/* Odd frame size so the UMEM doesn't end near a page boundary. */
test->ifobj_tx->umem->frame_size = 4001;
test->ifobj_rx->umem->frame_size = 4001;
test->ifobj_tx->umem->unaligned_mode = true;
test->ifobj_rx->umem->unaligned_mode = true;
/* This test exists to test descriptors that staddle the end of
* the UMEM but not a page.
*/
page_size = sysconf(_SC_PAGESIZE);
umem_size = test->ifobj_tx->umem->num_frames * test->ifobj_tx->umem->frame_size;
assert(umem_size % page_size > PKT_SIZE);
assert(umem_size % page_size < page_size - PKT_SIZE);
testapp_invalid_desc(test);
break;
}
case TEST_TYPE_UNALIGNED: case TEST_TYPE_UNALIGNED:
if (!testapp_unaligned(test)) if (!testapp_unaligned(test))
return; return;

1
tools/testing/selftests/bpf/xskxceiver.h
View File

@ -78,6 +78,7 @@ enum test_type {
TEST_TYPE_ALIGNED_INV_DESC, TEST_TYPE_ALIGNED_INV_DESC,
TEST_TYPE_ALIGNED_INV_DESC_2K_FRAME, TEST_TYPE_ALIGNED_INV_DESC_2K_FRAME,
TEST_TYPE_UNALIGNED_INV_DESC, TEST_TYPE_UNALIGNED_INV_DESC,
TEST_TYPE_UNALIGNED_INV_DESC_4K1_FRAME,
TEST_TYPE_HEADROOM, TEST_TYPE_HEADROOM,
TEST_TYPE_TEARDOWN, TEST_TYPE_TEARDOWN,
TEST_TYPE_BIDI, TEST_TYPE_BIDI,