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| author | John Fastabend <john.fastabend@gmail.com> | 2018-03-18 12:57:56 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-03-19 21:14:40 +0100 |
| commit | 1c16c3126ac938562a68ab7041fe74ce0de53166 (patch) | |
| tree | 5792e6806284fb388783223e3d9cd2d9ae70fdaf /tools | |
| parent | 6bce9d2ca65238d37890186bf41acd7f7d9a9820 (diff) | |
| download | linux-0-day-1c16c3126ac938562a68ab7041fe74ce0de53166.tar.gz linux-0-day-1c16c3126ac938562a68ab7041fe74ce0de53166.tar.xz | |
bpf: sockmap, add sample option to test apply_bytes helper
This adds an option to test the apply_bytes helper. This option lets
the user specify an int on the command line specifying how much data
each verdict should apply to.
When this is set a map entry is set with the bytes input by the user
and then the specified program --txmsg or --txmsg_redir will use the
value and set the applied data. If no other option is set then a
default --txmsg_apply program is run. This program will drop pkts
if an error is detected on the bytes map lookup. Useful to verify
the map lookup and apply helper are working and causing a hard
error if it is not.
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/bpf/bpf_helpers.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/bpf_helpers.h b/tools/testing/selftests/bpf/bpf_helpers.h index bba7ee6d93ab7..4713de48cf888 100644 --- a/tools/testing/selftests/bpf/bpf_helpers.h +++ b/tools/testing/selftests/bpf/bpf_helpers.h @@ -88,7 +88,8 @@ static int (*bpf_override_return)(void *ctx, unsigned long rc) = (void *) BPF_FUNC_override_return; static int (*bpf_msg_redirect_map)(void *ctx, void *map, int key, int flags) = (void *) BPF_FUNC_msg_redirect_map; - +static int (*bpf_msg_apply_bytes)(void *ctx, int len) = + (void *) BPF_FUNC_msg_apply_bytes; /* llvm builtin functions that eBPF C program may use to * emit BPF_LD_ABS and BPF_LD_IND instructions |