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selftests/bpf: Fix test dynptr/test_dynptr_memset_xdp_chunks failure

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For arm64 64K page size, the xdp data size was set to be more than 64K
in one of previous patches. This will cause failure for bpf_dynptr_memset().
Since the failure of bpf_dynptr_memset() is expected with 64K page size,
return success.

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://patch.msgid.link/20250725043440.209266-1-yonghong.song@linux.dev
This commit is contained in:
Yonghong Song 2025-07-24 21:34:40 -07:00 committed by Martin KaFai Lau
parent 90f791a975
commit 4a5dcb3373
1 changed files with 12 additions and 1 deletions
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13
tools/testing/selftests/bpf/progs/dynptr_success.c
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@ -9,6 +9,8 @@
#include "bpf_misc.h"
#include "errno.h"
#define PAGE_SIZE_64K 65536
char _license[] SEC("license") = "GPL";
int pid, err, val;
@ -821,8 +823,17 @@ int test_dynptr_memset_xdp_chunks(struct xdp_md *xdp)
data_sz = bpf_dynptr_size(&ptr_xdp);
err = bpf_dynptr_memset(&ptr_xdp, 0, data_sz, DYNPTR_MEMSET_VAL);
if (err)
if (err) {
/* bpf_dynptr_memset() eventually called bpf_xdp_pointer()
* where if data_sz is greater than 0xffff, -EFAULT will be
* returned. For 64K page size, data_sz is greater than
* 64K, so error is expected and let us zero out error and
* return success.
*/
if (data_sz >= PAGE_SIZE_64K)
err = 0;
goto out;
}
bpf_for(i, 0, max_chunks) {
offset = i * sizeof(buf);