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authorLorenz Bauer <lmb@cloudflare.com>2021-03-03 10:18:13 +0000
committerAlexei Starovoitov <ast@kernel.org>2021-03-04 19:11:29 -0800
commit7c32e8f8bc33a5f4b113a630857e46634e3e143b (patch)
tree460341732415db4d3ca17d9f44d4cc255148ff00 /tools/include/uapi
parent607b9cc92bd7208338d714a22b8082fe83bcb177 (diff)
downloadlinux-7c32e8f8bc33a5f4b113a630857e46634e3e143b.tar.bz2
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/uapi')
-rw-r--r--tools/include/uapi/linux/bpf.h5
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) */