1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2019 Facebook */ 3 #include <test_progs.h> 4 5 /* x86-64 fits 55 JITed and 43 interpreted progs into half page */ 6 #define CNT 40 7 8 void test_fexit_stress(void) 9 { 10 char test_skb[128] = {}; 11 int fexit_fd[CNT] = {}; 12 int link_fd[CNT] = {}; 13 __u32 duration = 0; 14 char error[4096]; 15 __u32 prog_ret; 16 int err, i, filter_fd; 17 18 const struct bpf_insn trace_program[] = { 19 BPF_MOV64_IMM(BPF_REG_0, 0), 20 BPF_EXIT_INSN(), 21 }; 22 23 struct bpf_load_program_attr load_attr = { 24 .prog_type = BPF_PROG_TYPE_TRACING, 25 .license = "GPL", 26 .insns = trace_program, 27 .insns_cnt = sizeof(trace_program) / sizeof(struct bpf_insn), 28 .expected_attach_type = BPF_TRACE_FEXIT, 29 }; 30 31 const struct bpf_insn skb_program[] = { 32 BPF_MOV64_IMM(BPF_REG_0, 0), 33 BPF_EXIT_INSN(), 34 }; 35 36 struct bpf_load_program_attr skb_load_attr = { 37 .prog_type = BPF_PROG_TYPE_SOCKET_FILTER, 38 .license = "GPL", 39 .insns = skb_program, 40 .insns_cnt = sizeof(skb_program) / sizeof(struct bpf_insn), 41 }; 42 43 err = libbpf_find_vmlinux_btf_id("bpf_fentry_test1", 44 load_attr.expected_attach_type); 45 if (CHECK(err <= 0, "find_vmlinux_btf_id", "failed: %d\n", err)) 46 goto out; 47 load_attr.attach_btf_id = err; 48 49 for (i = 0; i < CNT; i++) { 50 fexit_fd[i] = bpf_load_program_xattr(&load_attr, error, sizeof(error)); 51 if (CHECK(fexit_fd[i] < 0, "fexit loaded", 52 "failed: %d errno %d\n", fexit_fd[i], errno)) 53 goto out; 54 link_fd[i] = bpf_raw_tracepoint_open(NULL, fexit_fd[i]); 55 if (CHECK(link_fd[i] < 0, "fexit attach failed", 56 "prog %d failed: %d err %d\n", i, link_fd[i], errno)) 57 goto out; 58 } 59 60 filter_fd = bpf_load_program_xattr(&skb_load_attr, error, sizeof(error)); 61 if (CHECK(filter_fd < 0, "test_program_loaded", "failed: %d errno %d\n", 62 filter_fd, errno)) 63 goto out; 64 65 err = bpf_prog_test_run(filter_fd, 1, test_skb, sizeof(test_skb), 0, 66 0, &prog_ret, 0); 67 close(filter_fd); 68 CHECK_FAIL(err); 69 out: 70 for (i = 0; i < CNT; i++) { 71 if (link_fd[i]) 72 close(link_fd[i]); 73 if (fexit_fd[i]) 74 close(fexit_fd[i]); 75 } 76 } 77