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authorAlexei Starovoitov <ast@kernel.org>2019-11-14 10:57:12 -0800
committerDaniel Borkmann <daniel@iogearbox.net>2019-11-15 23:43:53 +0100
commite76d776e9ca1fe266b3a7f8091eee5d1e635a545 (patch)
tree816f43b05a2601e357e4d8aa2ec8a721d87f0c69 /tools
parent510312882c4b583fcd4fdf972d00e9ce631ed188 (diff)
downloadlinux-e76d776e9ca1fe266b3a7f8091eee5d1e635a545.tar.bz2
selftests/bpf: Add stress test for maximum number of progs
Add stress test for maximum number of attached BPF programs per BPF trampoline. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20191114185720.1641606-13-ast@kernel.org
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/bpf/prog_tests/fexit_stress.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/prog_tests/fexit_stress.c b/tools/testing/selftests/bpf/prog_tests/fexit_stress.c
new file mode 100644
index 000000000000..3b9dbf7433f0
--- /dev/null
+++ b/tools/testing/selftests/bpf/prog_tests/fexit_stress.c
@@ -0,0 +1,76 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Copyright (c) 2019 Facebook */
+#include <test_progs.h>
+
+/* x86-64 fits 55 JITed and 43 interpreted progs into half page */
+#define CNT 40
+
+void test_fexit_stress(void)
+{
+ char test_skb[128] = {};
+ int fexit_fd[CNT] = {};
+ int link_fd[CNT] = {};
+ __u32 duration = 0;
+ char error[4096];
+ __u32 prog_ret;
+ int err, i, filter_fd;
+
+ const struct bpf_insn trace_program[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+
+ struct bpf_load_program_attr load_attr = {
+ .prog_type = BPF_PROG_TYPE_TRACING,
+ .license = "GPL",
+ .insns = trace_program,
+ .insns_cnt = sizeof(trace_program) / sizeof(struct bpf_insn),
+ .expected_attach_type = BPF_TRACE_FEXIT,
+ };
+
+ const struct bpf_insn skb_program[] = {
+ BPF_MOV64_IMM(BPF_REG_0, 0),
+ BPF_EXIT_INSN(),
+ };
+
+ struct bpf_load_program_attr skb_load_attr = {
+ .prog_type = BPF_PROG_TYPE_SOCKET_FILTER,
+ .license = "GPL",
+ .insns = skb_program,
+ .insns_cnt = sizeof(skb_program) / sizeof(struct bpf_insn),
+ };
+
+ err = libbpf_find_vmlinux_btf_id("bpf_fentry_test1",
+ load_attr.expected_attach_type);
+ if (CHECK(err <= 0, "find_vmlinux_btf_id", "failed: %d\n", err))
+ goto out;
+ load_attr.attach_btf_id = err;
+
+ for (i = 0; i < CNT; i++) {
+ fexit_fd[i] = bpf_load_program_xattr(&load_attr, error, sizeof(error));
+ if (CHECK(fexit_fd[i] < 0, "fexit loaded",
+ "failed: %d errno %d\n", fexit_fd[i], errno))
+ goto out;
+ link_fd[i] = bpf_raw_tracepoint_open(NULL, fexit_fd[i]);
+ if (CHECK(link_fd[i] < 0, "fexit attach failed",
+ "prog %d failed: %d err %d\n", i, link_fd[i], errno))
+ goto out;
+ }
+
+ filter_fd = bpf_load_program_xattr(&skb_load_attr, error, sizeof(error));
+ if (CHECK(filter_fd < 0, "test_program_loaded", "failed: %d errno %d\n",
+ filter_fd, errno))
+ goto out;
+
+ err = bpf_prog_test_run(filter_fd, 1, test_skb, sizeof(test_skb), 0,
+ 0, &prog_ret, 0);
+ close(filter_fd);
+ CHECK_FAIL(err);
+out:
+ for (i = 0; i < CNT; i++) {
+ if (link_fd[i])
+ close(link_fd[i]);
+ if (fexit_fd[i])
+ close(fexit_fd[i]);
+ }
+}