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| author | Lorenz Bauer <lmb@cloudflare.com> | 2021-03-03 10:18:13 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-03-04 19:11:29 -0800 |
| commit | 7c32e8f8bc33a5f4b113a630857e46634e3e143b (patch) | |
| tree | 460341732415db4d3ca17d9f44d4cc255148ff00 /tools/include | |
| parent | 607b9cc92bd7208338d714a22b8082fe83bcb177 (diff) | |
| download | linux-7c32e8f8bc33a5f4b113a630857e46634e3e143b.tar.gz linux-7c32e8f8bc33a5f4b113a630857e46634e3e143b.tar.bz2 linux-7c32e8f8bc33a5f4b113a630857e46634e3e143b.zip | |
bpf: Add PROG_TEST_RUN support for sk_lookup programs
Allow to pass sk_lookup programs to PROG_TEST_RUN. User space
provides the full bpf_sk_lookup struct as context. Since the
context includes a socket pointer that can't be exposed
to user space we define that PROG_TEST_RUN returns the cookie
of the selected socket or zero in place of the socket pointer.
We don't support testing programs that select a reuseport socket,
since this would mean running another (unrelated) BPF program
from the sk_lookup test handler.
Signed-off-by: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210303101816.36774-3-lmb@cloudflare.com
Diffstat (limited to 'tools/include')
| -rw-r--r-- | tools/include/uapi/linux/bpf.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h index 63a56ed6a785..7f530e349aff 100644 --- a/tools/include/uapi/linux/bpf.h +++ b/tools/include/uapi/linux/bpf.h @@ -5953,7 +5953,10 @@ struct bpf_pidns_info { /* User accessible data for SK_LOOKUP programs. Add new fields at the end. */ struct bpf_sk_lookup { - __bpf_md_ptr(struct bpf_sock *, sk); /* Selected socket */ + union { + __bpf_md_ptr(struct bpf_sock *, sk); /* Selected socket */ + __u64 cookie; /* Non-zero if socket was selected in PROG_TEST_RUN */ + }; __u32 family; /* Protocol family (AF_INET, AF_INET6) */ __u32 protocol; /* IP protocol (IPPROTO_TCP, IPPROTO_UDP) */ |