diff options
Diffstat (limited to 'tools/testing/selftests/bpf/prog_tests/tc_qevent.c')
| -rw-r--r-- | tools/testing/selftests/bpf/prog_tests/tc_qevent.c | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/tc_qevent.c b/tools/testing/selftests/bpf/prog_tests/tc_qevent.c new file mode 100644 index 000000000000..67e1d17567ab --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/tc_qevent.c @@ -0,0 +1,113 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include <test_progs.h> +#include <network_helpers.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <unistd.h> +#include <string.h> + +#include "test_tc_qevent.skel.h" + +#define NS_TX "tc_qevent_tx" +#define NS_RX "tc_qevent_rx" +#define IP_TX "10.255.0.1" +#define IP_RX "10.255.0.2" +#define PIN_PATH "/sys/fs/bpf/tc_qevent_redirect" + +static void blast_udp(void) +{ + struct sockaddr_in dst = {}; + char buf[1400] = {}; + int fd, i; + + fd = socket(AF_INET, SOCK_DGRAM, 0); + if (!ASSERT_GE(fd, 0, "udp socket")) + return; + + dst.sin_family = AF_INET; + dst.sin_port = htons(12345); + inet_pton(AF_INET, IP_RX, &dst.sin_addr); + + /* + * Push far more than the RED queue can hold. Once qavg crosses qth_min + * every further packet hits the congestion_drop / early_drop qevent. + */ + for (i = 0; i < 50000; i++) + sendto(fd, buf, sizeof(buf), MSG_DONTWAIT, + (struct sockaddr *)&dst, sizeof(dst)); + + close(fd); +} + +static void run_qevent_redirect(struct bpf_program *prog, __u64 *counter) +{ + struct nstoken *tok = NULL; + int err; + + SYS_NOFAIL("ip netns del %s", NS_TX); + SYS_NOFAIL("ip netns del %s", NS_RX); + unlink(PIN_PATH); + + err = bpf_program__pin(prog, PIN_PATH); + if (!ASSERT_OK(err, "pin prog")) + return; + + SYS(unpin, "ip netns add %s", NS_TX); + SYS(del_tx, "ip netns add %s", NS_RX); + SYS(del_rx, "ip -n %s link add veth0 type veth peer name veth1 netns %s", NS_TX, NS_RX); + SYS(del_rx, "ip -n %s addr add %s/24 dev veth0", NS_TX, IP_TX); + SYS(del_rx, "ip -n %s link set veth0 up", NS_TX); + SYS(del_rx, "ip -n %s addr add %s/24 dev veth1", NS_RX, IP_RX); + SYS(del_rx, "ip -n %s link set veth1 up", NS_RX); + + tok = open_netns(NS_TX); + if (!ASSERT_OK_PTR(tok, "open_netns")) + goto del_rx; + + SYS(close_ns, "tc qdisc add dev veth0 root handle 1: htb default 1"); + SYS(close_ns, "tc class add dev veth0 parent 1: classid 1:1 htb rate 1mbit ceil 1mbit"); + + if (system("tc qdisc add dev veth0 parent 1:1 handle 11: red " + "limit 500000 avpkt 1000 probability 1 min 5000 max 6000 " + "burst 6 qevent early_drop block 10 2>/dev/null")) { + test__skip(); + goto close_ns; + } + + if (system("tc filter add block 10 bpf da object-pinned " + PIN_PATH " 2>/dev/null")) { + test__skip(); + goto close_ns; + } + + blast_udp(); + ASSERT_GT(*counter, 0, "qevent classifier ran"); +close_ns: + close_netns(tok); +del_rx: + SYS_NOFAIL("ip netns del %s", NS_RX); +del_tx: + SYS_NOFAIL("ip netns del %s", NS_TX); +unpin: + bpf_program__unpin(prog, PIN_PATH); +} + +void test_tc_qevent(void) +{ + struct test_tc_qevent *skel; + + skel = test_tc_qevent__open_and_load(); + if (!ASSERT_OK_PTR(skel, "open_and_load")) + return; + + if (test__start_subtest("redirect_verdict")) + run_qevent_redirect(skel->progs.qevent_redirect_verdict, + &skel->bss->verdict_calls); + if (test__start_subtest("redirect_helper")) + run_qevent_redirect(skel->progs.qevent_redirect_helper, + &skel->bss->helper_calls); + + test_tc_qevent__destroy(skel); +} |