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| author | Yonghong Song <yhs@fb.com> | 2017-06-13 15:52:14 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-06-14 14:56:25 -0400 |
| commit | 18f3d6be6be124316d3abfee667c5e8b88dec100 (patch) | |
| tree | bc04b4c45c52a732e1d92c7348e3a1354bfd47f6 /tools/testing/selftests/bpf/test_pkt_md_access.c | |
| parent | 31fd85816dbe3a714bcc3f67c17c3dd87011f79e (diff) | |
| download | linux-18f3d6be6be124316d3abfee667c5e8b88dec100.tar.gz linux-18f3d6be6be124316d3abfee667c5e8b88dec100.tar.bz2 linux-18f3d6be6be124316d3abfee667c5e8b88dec100.zip | |
selftests/bpf: Add test cases to test narrower ctx field loads
Add test cases in test_verifier and test_progs.
Negative tests are added in test_verifier as well.
The test in test_progs will compare the value of narrower ctx field
load result vs. the masked value of normal full-field load result,
and will fail if they are not the same.
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/bpf/test_pkt_md_access.c')
| -rw-r--r-- | tools/testing/selftests/bpf/test_pkt_md_access.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_pkt_md_access.c b/tools/testing/selftests/bpf/test_pkt_md_access.c new file mode 100644 index 000000000000..71729d47eb85 --- /dev/null +++ b/tools/testing/selftests/bpf/test_pkt_md_access.c @@ -0,0 +1,35 @@ +/* Copyright (c) 2017 Facebook + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + */ +#include <stddef.h> +#include <string.h> +#include <linux/bpf.h> +#include <linux/pkt_cls.h> +#include "bpf_helpers.h" + +int _version SEC("version") = 1; + +#define TEST_FIELD(TYPE, FIELD, MASK) \ + { \ + TYPE tmp = *(volatile TYPE *)&skb->FIELD; \ + if (tmp != ((*(volatile __u32 *)&skb->FIELD) & MASK)) \ + return TC_ACT_SHOT; \ + } + +SEC("test1") +int process(struct __sk_buff *skb) +{ + TEST_FIELD(__u8, len, 0xFF); + TEST_FIELD(__u16, len, 0xFFFF); + TEST_FIELD(__u32, len, 0xFFFFFFFF); + TEST_FIELD(__u16, protocol, 0xFFFF); + TEST_FIELD(__u32, protocol, 0xFFFFFFFF); + TEST_FIELD(__u8, hash, 0xFF); + TEST_FIELD(__u16, hash, 0xFFFF); + TEST_FIELD(__u32, hash, 0xFFFFFFFF); + + return TC_ACT_OK; +} |