diff options
| author | Prankur gupta <prankgup@fb.com> | 2020-12-02 13:31:52 -0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-12-03 17:23:24 -0800 |
| commit | 55144f31f0d2fdd3e74ead67f1649bf577961eaa (patch) | |
| tree | b1c7a0f08e572ddb25c8016d65cb2ee588b1c2ea /tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c | |
| parent | cb81110997d1f5097f29dd8e49d32a1fc55cbf86 (diff) | |
selftests/bpf: Add Userspace tests for TCP_WINDOW_CLAMP
Adding selftests for new added functionality to set TCP_WINDOW_CLAMP
from bpf setsockopt.
Signed-off-by: Prankur gupta <prankgup@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20201202213152.435886-3-prankgup@fb.com
Diffstat (limited to 'tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c')
| -rw-r--r-- | tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c b/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c index e85e49deba70..94f50f7e94d6 100644 --- a/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c +++ b/tools/testing/selftests/bpf/progs/test_tcpbpf_kern.c @@ -12,17 +12,41 @@ #include <linux/tcp.h> #include <bpf/bpf_helpers.h> #include <bpf/bpf_endian.h> +#include "bpf_tcp_helpers.h" #include "test_tcpbpf.h" struct tcpbpf_globals global = {}; int _version SEC("version") = 1; +/** + * SOL_TCP is defined in <netinet/tcp.h> while + * TCP_SAVED_SYN is defined in already included <linux/tcp.h> + */ +#ifndef SOL_TCP +#define SOL_TCP 6 +#endif + +static __always_inline int get_tp_window_clamp(struct bpf_sock_ops *skops) +{ + struct bpf_sock *sk; + struct tcp_sock *tp; + + sk = skops->sk; + if (!sk) + return -1; + tp = bpf_skc_to_tcp_sock(sk); + if (!tp) + return -1; + return tp->window_clamp; +} + SEC("sockops") int bpf_testcb(struct bpf_sock_ops *skops) { char header[sizeof(struct ipv6hdr) + sizeof(struct tcphdr)]; struct bpf_sock_ops *reuse = skops; struct tcphdr *thdr; + int window_clamp = 9216; int good_call_rv = 0; int bad_call_rv = 0; int save_syn = 1; @@ -75,6 +99,11 @@ int bpf_testcb(struct bpf_sock_ops *skops) global.event_map |= (1 << op); switch (op) { + case BPF_SOCK_OPS_TCP_CONNECT_CB: + rv = bpf_setsockopt(skops, SOL_TCP, TCP_WINDOW_CLAMP, + &window_clamp, sizeof(window_clamp)); + global.window_clamp_client = get_tp_window_clamp(skops); + break; case BPF_SOCK_OPS_ACTIVE_ESTABLISHED_CB: /* Test failure to set largest cb flag (assumes not defined) */ global.bad_cb_test_rv = bpf_sock_ops_cb_flags_set(skops, 0x80); @@ -100,6 +129,10 @@ int bpf_testcb(struct bpf_sock_ops *skops) global.tcp_saved_syn = v; } } + rv = bpf_setsockopt(skops, SOL_TCP, TCP_WINDOW_CLAMP, + &window_clamp, sizeof(window_clamp)); + + global.window_clamp_server = get_tp_window_clamp(skops); break; case BPF_SOCK_OPS_RTO_CB: break; |