diff options
| author | Nikita V. Shirokov <tehnerd@tehnerd.com> | 2020-10-09 09:03:25 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2020-10-09 17:12:03 +0200 |
| commit | eca43ee6c46db92dd850ce659316b0680d70e137 (patch) | |
| tree | e5c85ee2588c031f26a63176495f45654168f3c5 /tools/testing/selftests | |
| parent | xsk: Introduce padding between ring pointers (diff) | |
| download | linux-eca43ee6c46db92dd850ce659316b0680d70e137.tar.xz linux-eca43ee6c46db92dd850ce659316b0680d70e137.zip | |
bpf: Add tcp_notsent_lowat bpf setsockopt
Adding support for TCP_NOTSENT_LOWAT sockoption (https://lwn.net/Articles/560082/)
in tcp bpf programs.
Signed-off-by: Nikita V. Shirokov <tehnerd@tehnerd.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20201009070325.226855-1-tehnerd@tehnerd.com
Diffstat (limited to 'tools/testing/selftests')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/connect4_prog.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/connect4_prog.c b/tools/testing/selftests/bpf/progs/connect4_prog.c index b1b2773c0b9d..a943d394fd3a 100644 --- a/tools/testing/selftests/bpf/progs/connect4_prog.c +++ b/tools/testing/selftests/bpf/progs/connect4_prog.c @@ -23,6 +23,10 @@ #define TCP_CA_NAME_MAX 16 #endif +#ifndef TCP_NOTSENT_LOWAT +#define TCP_NOTSENT_LOWAT 25 +#endif + #ifndef IFNAMSIZ #define IFNAMSIZ 16 #endif @@ -128,6 +132,18 @@ static __inline int set_keepalive(struct bpf_sock_addr *ctx) return 0; } +static __inline int set_notsent_lowat(struct bpf_sock_addr *ctx) +{ + int lowat = 65535; + + if (ctx->type == SOCK_STREAM) { + if (bpf_setsockopt(ctx, SOL_TCP, TCP_NOTSENT_LOWAT, &lowat, sizeof(lowat))) + return 1; + } + + return 0; +} + SEC("cgroup/connect4") int connect_v4_prog(struct bpf_sock_addr *ctx) { @@ -148,6 +164,9 @@ int connect_v4_prog(struct bpf_sock_addr *ctx) if (set_keepalive(ctx)) return 0; + if (set_notsent_lowat(ctx)) + return 0; + if (ctx->type != SOCK_STREAM && ctx->type != SOCK_DGRAM) return 0; else if (ctx->type == SOCK_STREAM) |