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| author |   Alexei Starovoitov <ast@kernel.org> | 2020-01-09 22:41:21 -0800 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2020-01-10 17:20:07 +0100 |
| commit | 7608e4db6ded8e965dd213baddedba9602959e7d (patch) | |
| tree | 3da1445e925efe469d7d8fe1fc0d542c5a115200 /tools/testing/selftests/bpf/progs/test_pkt_access.c | |
| parent | bpf: Introduce function-by-function verification (diff) | |
| download | linux-dev-7608e4db6ded8e965dd213baddedba9602959e7d.tar.xz linux-dev-7608e4db6ded8e965dd213baddedba9602959e7d.zip | |
selftests/bpf: Add fexit-to-skb test for global funcs
Add simple fexit prog type to skb prog type test when subprogram is a global
function.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20200110064124.1760511-4-ast@kernel.org
Diffstat (limited to '')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_pkt_access.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_pkt_access.c b/tools/testing/selftests/bpf/progs/test_pkt_access.c index 3a7b4b607ed3..b77cebf71e66 100644 --- a/tools/testing/selftests/bpf/progs/test_pkt_access.c +++ b/tools/testing/selftests/bpf/progs/test_pkt_access.c @@ -47,6 +47,32 @@ int test_pkt_access_subprog2(int val, volatile struct __sk_buff *skb) return skb->len * val; } +#define MAX_STACK (512 - 2 * 32) + +__attribute__ ((noinline)) +int get_skb_len(struct __sk_buff *skb) +{ + volatile char buf[MAX_STACK] = {}; + + return skb->len; +} + +int get_skb_ifindex(int, struct __sk_buff *skb, int); + +__attribute__ ((noinline)) +int test_pkt_access_subprog3(int val, struct __sk_buff *skb) +{ + return get_skb_len(skb) * get_skb_ifindex(val, skb, 1); +} + +__attribute__ ((noinline)) +int get_skb_ifindex(int val, struct __sk_buff *skb, int var) +{ + volatile char buf[MAX_STACK] = {}; + + return skb->ifindex * val * var; +} + SEC("classifier/test_pkt_access") int test_pkt_access(struct __sk_buff *skb) { @@ -82,6 +108,8 @@ int test_pkt_access(struct __sk_buff *skb) return TC_ACT_SHOT; if (test_pkt_access_subprog2(2, skb) != skb->len * 2) return TC_ACT_SHOT; + if (test_pkt_access_subprog3(3, skb) != skb->len * 3 * skb->ifindex) + return TC_ACT_SHOT; if (tcp) { if (((void *)(tcp) + 20) > data_end || proto != 6) return TC_ACT_SHOT; |