On 7/25/25 05:34, Yonghong Song wrote:
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: Yonghong Song <yonghong.song@xxxxxxxxx>
---
tools/testing/selftests/bpf/progs/dynptr_success.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/bpf/progs/dynptr_success.c b/tools/testing/selftests/bpf/progs/dynptr_success.c
index 7d7081d05d47..3094a1e4ee91 100644
--- a/tools/testing/selftests/bpf/progs/dynptr_success.c
+++ b/tools/testing/selftests/bpf/progs/dynptr_success.c
@@ -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:
Acked-by: Mykyta Yatsenko <yatsenko@xxxxxxxx>
