diff options
| author |   Stanislav Fomichev <sdf@google.com> | 2021-01-27 15:28:50 -0800 |
|---|---|---|
| committer |   Daniel Borkmann <daniel@iogearbox.net> | 2021-01-29 02:09:05 +0100 |
| commit | 62476cc1bf24b34d9442c7ba76e5eb6bf242f911 (patch) | |
| tree | 2a81706fa27cea2f47c51f296eb07e9809f117fe /tools/testing/selftests/bpf/progs/sendmsg4_prog.c | |
| parent | tools: Factor Clang, LLC and LLVM utils definitions (diff) | |
| download | linux-62476cc1bf24b34d9442c7ba76e5eb6bf242f911.tar.xz linux-62476cc1bf24b34d9442c7ba76e5eb6bf242f911.zip | |
bpf: Enable bpf_{g,s}etsockopt in BPF_CGROUP_UDP{4,6}_SENDMSG
Can be used to query/modify socket state for unconnected UDP sendmsg.
Those hooks run as BPF_CGROUP_RUN_SA_PROG_LOCK and operate on
a locked socket.
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20210127232853.3753823-2-sdf@google.com
Diffstat (limited to 'tools/testing/selftests/bpf/progs/sendmsg4_prog.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/sendmsg4_prog.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/sendmsg4_prog.c b/tools/testing/selftests/bpf/progs/sendmsg4_prog.c index 092d9da536f3..ac5abc34cde8 100644 --- a/tools/testing/selftests/bpf/progs/sendmsg4_prog.c +++ b/tools/testing/selftests/bpf/progs/sendmsg4_prog.c @@ -8,6 +8,8 @@ #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> +#include <bpf_sockopt_helpers.h> + #define SRC1_IP4 0xAC100001U /* 172.16.0.1 */ #define SRC2_IP4 0x00000000U #define SRC_REWRITE_IP4 0x7f000004U @@ -21,9 +23,14 @@ int _version SEC("version") = 1; SEC("cgroup/sendmsg4") int sendmsg_v4_prog(struct bpf_sock_addr *ctx) { + int prio; + if (ctx->type != SOCK_DGRAM) return 0; + if (!get_set_sk_priority(ctx)) + return 0; + /* Rewrite source. */ if (ctx->msg_src_ip4 == bpf_htonl(SRC1_IP4) || ctx->msg_src_ip4 == bpf_htonl(SRC2_IP4)) { |