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| author |   Stanislav Fomichev <sdf@google.com> | 2019-07-29 14:51:11 -0700 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2019-08-01 13:55:52 -0700 |
| commit | fd5ef31f370a8b7000794cd8a428b349dbfbbb80 (patch) | |
| tree | ea5d70a8c8822f44c1d2bea45adc64769a6167d7 /tools/testing/selftests/bpf/test_sockopt_sk.c | |
| parent | bpf: always allocate at least 16 bytes for setsockopt hook (diff) | |
| download | linux-dev-fd5ef31f370a8b7000794cd8a428b349dbfbbb80.tar.xz linux-dev-fd5ef31f370a8b7000794cd8a428b349dbfbbb80.zip | |
selftests/bpf: extend sockopt_sk selftest with TCP_CONGESTION use case
Ignore SOL_TCP:TCP_CONGESTION in getsockopt and always override
SOL_TCP:TCP_CONGESTION with "cubic" in setsockopt hook.
Call setsockopt(SOL_TCP, TCP_CONGESTION) with short optval ("nv")
to make sure BPF program has enough buffer space to replace it
with "cubic".
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | tools/testing/selftests/bpf/test_sockopt_sk.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_sockopt_sk.c b/tools/testing/selftests/bpf/test_sockopt_sk.c index 036b652e5ca9..e4f6055d92e9 100644 --- a/tools/testing/selftests/bpf/test_sockopt_sk.c +++ b/tools/testing/selftests/bpf/test_sockopt_sk.c @@ -6,6 +6,7 @@ #include <sys/types.h> #include <sys/socket.h> #include <netinet/in.h> +#include <netinet/tcp.h> #include <linux/filter.h> #include <bpf/bpf.h> @@ -25,6 +26,7 @@ static int getsetsockopt(void) union { char u8[4]; __u32 u32; + char cc[16]; /* TCP_CA_NAME_MAX */ } buf = {}; socklen_t optlen; @@ -115,6 +117,29 @@ static int getsetsockopt(void) goto err; } + /* TCP_CONGESTION can extend the string */ + + strcpy(buf.cc, "nv"); + err = setsockopt(fd, SOL_TCP, TCP_CONGESTION, &buf, strlen("nv")); + if (err) { + log_err("Failed to call setsockopt(TCP_CONGESTION)"); + goto err; + } + + + optlen = sizeof(buf.cc); + err = getsockopt(fd, SOL_TCP, TCP_CONGESTION, &buf, &optlen); + if (err) { + log_err("Failed to call getsockopt(TCP_CONGESTION)"); + goto err; + } + + if (strcmp(buf.cc, "cubic") != 0) { + log_err("Unexpected getsockopt(TCP_CONGESTION) %s != %s", + buf.cc, "cubic"); + goto err; + } + close(fd); return 0; err: |