From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- tools/testing/selftests/bpf/prog_tests/kfree_skb.c | 127 +++++++++++++++++++++ 1 file changed, 127 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/kfree_skb.c (limited to 'tools/testing/selftests/bpf/prog_tests/kfree_skb.c') diff --git a/tools/testing/selftests/bpf/prog_tests/kfree_skb.c b/tools/testing/selftests/bpf/prog_tests/kfree_skb.c new file mode 100644 index 000000000..73579370b --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/kfree_skb.c @@ -0,0 +1,127 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include "kfree_skb.skel.h" + +struct meta { + int ifindex; + __u32 cb32_0; + __u8 cb8_0; +}; + +static union { + __u32 cb32[5]; + __u8 cb8[20]; +} cb = { + .cb32[0] = 0x81828384, +}; + +static void on_sample(void *ctx, int cpu, void *data, __u32 size) +{ + struct meta *meta = (struct meta *)data; + struct ipv6_packet *pkt_v6 = data + sizeof(*meta); + int duration = 0; + + if (CHECK(size != 72 + sizeof(*meta), "check_size", "size %u != %zu\n", + size, 72 + sizeof(*meta))) + return; + if (CHECK(meta->ifindex != 1, "check_meta_ifindex", + "meta->ifindex = %d\n", meta->ifindex)) + /* spurious kfree_skb not on loopback device */ + return; + if (CHECK(meta->cb8_0 != cb.cb8[0], "check_cb8_0", "cb8_0 %x != %x\n", + meta->cb8_0, cb.cb8[0])) + return; + if (CHECK(meta->cb32_0 != cb.cb32[0], "check_cb32_0", + "cb32_0 %x != %x\n", + meta->cb32_0, cb.cb32[0])) + return; + if (CHECK(pkt_v6->eth.h_proto != 0xdd86, "check_eth", + "h_proto %x\n", pkt_v6->eth.h_proto)) + return; + if (CHECK(pkt_v6->iph.nexthdr != 6, "check_ip", + "iph.nexthdr %x\n", pkt_v6->iph.nexthdr)) + return; + if (CHECK(pkt_v6->tcp.doff != 5, "check_tcp", + "tcp.doff %x\n", pkt_v6->tcp.doff)) + return; + + *(bool *)ctx = true; +} + +/* TODO: fix kernel panic caused by this test in parallel mode */ +void serial_test_kfree_skb(void) +{ + struct __sk_buff skb = {}; + LIBBPF_OPTS(bpf_test_run_opts, topts, + .data_in = &pkt_v6, + .data_size_in = sizeof(pkt_v6), + .ctx_in = &skb, + .ctx_size_in = sizeof(skb), + ); + struct kfree_skb *skel = NULL; + struct bpf_link *link; + struct bpf_object *obj; + struct perf_buffer *pb = NULL; + int err, prog_fd; + bool passed = false; + __u32 duration = 0; + const int zero = 0; + bool test_ok[2]; + + err = bpf_prog_test_load("./test_pkt_access.bpf.o", BPF_PROG_TYPE_SCHED_CLS, + &obj, &prog_fd); + if (CHECK(err, "prog_load sched cls", "err %d errno %d\n", err, errno)) + return; + + skel = kfree_skb__open_and_load(); + if (!ASSERT_OK_PTR(skel, "kfree_skb_skel")) + goto close_prog; + + link = bpf_program__attach_raw_tracepoint(skel->progs.trace_kfree_skb, NULL); + if (!ASSERT_OK_PTR(link, "attach_raw_tp")) + goto close_prog; + skel->links.trace_kfree_skb = link; + + link = bpf_program__attach_trace(skel->progs.fentry_eth_type_trans); + if (!ASSERT_OK_PTR(link, "attach fentry")) + goto close_prog; + skel->links.fentry_eth_type_trans = link; + + link = bpf_program__attach_trace(skel->progs.fexit_eth_type_trans); + if (!ASSERT_OK_PTR(link, "attach fexit")) + goto close_prog; + skel->links.fexit_eth_type_trans = link; + + /* set up perf buffer */ + pb = perf_buffer__new(bpf_map__fd(skel->maps.perf_buf_map), 1, + on_sample, NULL, &passed, NULL); + if (!ASSERT_OK_PTR(pb, "perf_buf__new")) + goto close_prog; + + memcpy(skb.cb, &cb, sizeof(cb)); + err = bpf_prog_test_run_opts(prog_fd, &topts); + ASSERT_OK(err, "ipv6 test_run"); + ASSERT_OK(topts.retval, "ipv6 test_run retval"); + + /* read perf buffer */ + err = perf_buffer__poll(pb, 100); + if (CHECK(err < 0, "perf_buffer__poll", "err %d\n", err)) + goto close_prog; + + /* make sure kfree_skb program was triggered + * and it sent expected skb into ring buffer + */ + ASSERT_TRUE(passed, "passed"); + + err = bpf_map_lookup_elem(bpf_map__fd(skel->maps.bss), &zero, test_ok); + if (CHECK(err, "get_result", + "failed to get output data: %d\n", err)) + goto close_prog; + + CHECK_FAIL(!test_ok[0] || !test_ok[1]); +close_prog: + perf_buffer__free(pb); + bpf_object__close(obj); + kfree_skb__destroy(skel); +} -- cgit v1.2.3