Commit 90f791a9 authored by Yonghong Song's avatar Yonghong Song Committed by Martin KaFai Lau
Browse files

selftests/bpf: Fix test dynptr/test_dynptr_copy_xdp failure 



For arm64 64K page size, the bpf_dynptr_copy() in test dynptr/test_dynptr_copy_xdp
will succeed, but the test will failure with 4K page size. This patch made a change
so the test will fail expectedly for both 4K and 64K page sizes.

Signed-off-by: default avatarYonghong Song <yonghong.song@linux.dev>
Signed-off-by: default avatarMartin KaFai Lau <martin.lau@kernel.org>
Acked-by: default avatarMykyta Yatsenko <yatsenko@meta.com>
Link: https://patch.msgid.link/20250725043435.208974-1-yonghong.song@linux.dev
parent 4c82768e

tools/testing/selftests/bpf/progs/dynptr_success.c

+3 −2
Original line number Diff line number Diff line
@@ -611,11 +611,12 @@ int test_dynptr_copy_xdp(struct xdp_md *xdp) 
	struct bpf_dynptr ptr_buf, ptr_xdp;

	char data[] = "qwertyuiopasdfghjkl";

	char buf[32] = {'\0'};

	__u32 len = sizeof(data);

	__u32 len = sizeof(data), xdp_data_size;

	int i, chunks = 200;



	/* ptr_xdp is backed by non-contiguous memory */

	bpf_dynptr_from_xdp(xdp, 0, &ptr_xdp);

	xdp_data_size = bpf_dynptr_size(&ptr_xdp);

	bpf_ringbuf_reserve_dynptr(&ringbuf, len * chunks, 0, &ptr_buf);



	/* Destination dynptr is backed by non-contiguous memory */
@@ -673,7 +674,7 @@ int test_dynptr_copy_xdp(struct xdp_md *xdp) 
			goto out;

	}



	if (bpf_dynptr_copy(&ptr_xdp, 2000, &ptr_xdp, 0, len * chunks) != -E2BIG)

	if (bpf_dynptr_copy(&ptr_xdp, xdp_data_size - 3000, &ptr_xdp, 0, len * chunks) != -E2BIG)

		err = 1;



out: