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adultscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2104190000 definitions=main-2106290119 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org On 6/25/21 1:05 PM, Martin KaFai Lau wrote: > This patch adds tests for the batching and bpf_setsockopt in bpf tcp iter. > > It first creates: > a) 1 non SO_REUSEPORT listener in lhash2. > b) 256 passive and active fds connected to the listener in (a). > c) 256 SO_REUSEPORT listeners in one of the lhash2 bucket. > > The test sets all listeners and connections to bpf_cubic before > running the bpf iter. > > The bpf iter then calls setsockopt(TCP_CONGESTION) to switch > each listener and connection from bpf_cubic to bpf_dctcp. > > The bpf iter has a random_retry mode such that it can return EAGAIN > to the usespace in the middle of a batch. > > Signed-off-by: Martin KaFai Lau > --- > tools/testing/selftests/bpf/network_helpers.c | 85 ++++++- > tools/testing/selftests/bpf/network_helpers.h | 4 + > .../bpf/prog_tests/bpf_iter_setsockopt.c | 226 ++++++++++++++++++ > .../selftests/bpf/progs/bpf_iter_setsockopt.c | 76 ++++++ > .../selftests/bpf/progs/bpf_tracing_net.h | 4 + > 5 files changed, 386 insertions(+), 9 deletions(-) > create mode 100644 tools/testing/selftests/bpf/prog_tests/bpf_iter_setsockopt.c > create mode 100644 tools/testing/selftests/bpf/progs/bpf_iter_setsockopt.c > > diff --git a/tools/testing/selftests/bpf/network_helpers.c b/tools/testing/selftests/bpf/network_helpers.c > index 2060bc122c53..26468a8f44f3 100644 > --- a/tools/testing/selftests/bpf/network_helpers.c > +++ b/tools/testing/selftests/bpf/network_helpers.c > @@ -66,17 +66,13 @@ int settimeo(int fd, int timeout_ms) > > #define save_errno_close(fd) ({ int __save = errno; close(fd); errno = __save; }) > > -int start_server(int family, int type, const char *addr_str, __u16 port, > - int timeout_ms) > +static int __start_server(int type, const struct sockaddr *addr, > + socklen_t addrlen, int timeout_ms, bool reuseport) > { > - struct sockaddr_storage addr = {}; > - socklen_t len; > + int on = 1; > int fd; > > - if (make_sockaddr(family, addr_str, port, &addr, &len)) > - return -1; > - > - fd = socket(family, type, 0); > + fd = socket(addr->sa_family, type, 0); > if (fd < 0) { > log_err("Failed to create server socket"); > return -1; > @@ -85,7 +81,13 @@ int start_server(int family, int type, const char *addr_str, __u16 port, > if (settimeo(fd, timeout_ms)) > goto error_close; > > - if (bind(fd, (const struct sockaddr *)&addr, len) < 0) { > + if (reuseport && > + setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &on, sizeof(on))) { > + log_err("Failed to set SO_REUSEPORT"); > + return -1; > + } > + > + if (bind(fd, addr, addrlen) < 0) { > log_err("Failed to bind socket"); > goto error_close; > } > @@ -104,6 +106,69 @@ int start_server(int family, int type, const char *addr_str, __u16 port, > return -1; > } > [...] > +void test_bpf_iter_setsockopt(void) > +{ > + struct bpf_iter_setsockopt *iter_skel = NULL; > + struct bpf_cubic *cubic_skel = NULL; > + struct bpf_dctcp *dctcp_skel = NULL; > + struct bpf_link *cubic_link = NULL; > + struct bpf_link *dctcp_link = NULL; > + > + if (create_netns()) > + return; > + > + /* Load iter_skel */ > + iter_skel = bpf_iter_setsockopt__open_and_load(); > + if (!ASSERT_OK_PTR(iter_skel, "iter_skel")) > + return; > + iter_skel->links.change_tcp_cc = bpf_program__attach_iter(iter_skel->progs.change_tcp_cc, NULL); > + if (!ASSERT_OK_PTR(iter_skel->links.change_tcp_cc, "attach iter")) > + goto done; > + > + /* Load bpf_cubic */ > + cubic_skel = bpf_cubic__open_and_load(); > + if (!ASSERT_OK_PTR(cubic_skel, "cubic_skel")) > + goto done; > + cubic_link = bpf_map__attach_struct_ops(cubic_skel->maps.cubic); > + if (!ASSERT_OK_PTR(cubic_link, "cubic_link")) > + goto done; > + > + /* Load bpf_dctcp */ > + dctcp_skel = bpf_dctcp__open_and_load(); > + if (!ASSERT_OK_PTR(dctcp_skel, "dctcp_skel")) > + goto done; > + dctcp_link = bpf_map__attach_struct_ops(dctcp_skel->maps.dctcp); > + if (!ASSERT_OK_PTR(dctcp_link, "dctcp_link")) > + goto done; > + > + do_bpf_iter_setsockopt(iter_skel, true); > + do_bpf_iter_setsockopt(iter_skel, false); > + > +done: > + bpf_link__destroy(cubic_link); > + bpf_link__destroy(dctcp_link); > + bpf_cubic__destroy(cubic_skel); > + bpf_dctcp__destroy(dctcp_skel); > + bpf_iter_setsockopt__destroy(iter_skel); > +} > diff --git a/tools/testing/selftests/bpf/progs/bpf_iter_setsockopt.c b/tools/testing/selftests/bpf/progs/bpf_iter_setsockopt.c > new file mode 100644 > index 000000000000..72cc4c1c681e > --- /dev/null > +++ b/tools/testing/selftests/bpf/progs/bpf_iter_setsockopt.c > @@ -0,0 +1,76 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* Copyright (c) 2021 Facebook */ > +#include "bpf_iter.h" > +#include "bpf_tracing_net.h" > +#include > +#include > + > +#define sk_num __sk_common.skc_num > +#define sk_dport __sk_common.skc_dport > +#define sk_state __sk_common.skc_state > +#define sk_family __sk_common.skc_family The above macros can be defined in bpf_tracing_net.h. For example, sk_state and sk_family are alraedy defined in bpf_tracing_net.h. #define sk_family __sk_common.skc_family #define sk_rmem_alloc sk_backlog.rmem_alloc #define sk_refcnt __sk_common.skc_refcnt #define sk_state __sk_common.skc_state #define sk_v6_daddr __sk_common.skc_v6_daddr #define sk_v6_rcv_saddr __sk_common.skc_v6_rcv_saddr > + > +#define bpf_tcp_sk(skc) ({ \ > + struct sock_common *_skc = skc; \ > + sk = NULL; \ > + tp = NULL; \ > + if (_skc) { \ > + tp = bpf_skc_to_tcp_sock(_skc); \ > + sk = (struct sock *)tp; \ > + } \ > + tp; \ > +}) [...] > + > +char _license[] SEC("license") = "GPL"; > diff --git a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h > index 01378911252b..d66c4caaeec1 100644 > --- a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h > +++ b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h > @@ -5,6 +5,10 @@ > #define AF_INET 2 > #define AF_INET6 10 > > +#define SOL_TCP 6 > +#define TCP_CONGESTION 13 > +#define TCP_CA_NAME_MAX 16 > + > #define ICSK_TIME_RETRANS 1 > #define ICSK_TIME_PROBE0 3 > #define ICSK_TIME_LOSS_PROBE 5 >