1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2024 Meta Platforms, Inc. and affiliates. 4 * Copyright (c) 2024 David Vernet <dvernet@meta.com> 5 */ 6 #include <bpf/bpf.h> 7 #include <sched.h> 8 #include <scx/common.h> 9 #include <sys/wait.h> 10 #include <unistd.h> 11 #include "prog_run.bpf.skel.h" 12 #include "scx_test.h" 13 14 static enum scx_test_status setup(void **ctx) 15 { 16 struct prog_run *skel; 17 18 skel = prog_run__open_and_load(); 19 if (!skel) { 20 SCX_ERR("Failed to open and load skel"); 21 return SCX_TEST_FAIL; 22 } 23 *ctx = skel; 24 25 return SCX_TEST_PASS; 26 } 27 28 static enum scx_test_status run(void *ctx) 29 { 30 struct prog_run *skel = ctx; 31 struct bpf_link *link; 32 int prog_fd, err = 0; 33 34 prog_fd = bpf_program__fd(skel->progs.prog_run_syscall); 35 if (prog_fd < 0) { 36 SCX_ERR("Failed to get BPF_PROG_RUN prog"); 37 return SCX_TEST_FAIL; 38 } 39 40 LIBBPF_OPTS(bpf_test_run_opts, topts); 41 42 link = bpf_map__attach_struct_ops(skel->maps.prog_run_ops); 43 if (!link) { 44 SCX_ERR("Failed to attach scheduler"); 45 close(prog_fd); 46 return SCX_TEST_FAIL; 47 } 48 49 err = bpf_prog_test_run_opts(prog_fd, &topts); 50 SCX_EQ(err, 0); 51 52 /* Assumes uei.kind is written last */ 53 while (skel->data->uei.kind == EXIT_KIND(SCX_EXIT_NONE)) 54 sched_yield(); 55 56 SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_UNREG_BPF)); 57 SCX_EQ(skel->data->uei.exit_code, 0xdeadbeef); 58 close(prog_fd); 59 bpf_link__destroy(link); 60 61 return SCX_TEST_PASS; 62 } 63 64 static void cleanup(void *ctx) 65 { 66 struct prog_run *skel = ctx; 67 68 prog_run__destroy(skel); 69 } 70 71 struct scx_test prog_run = { 72 .name = "prog_run", 73 .description = "Verify we can call into a scheduler with BPF_PROG_RUN, and invoke kfuncs", 74 .setup = setup, 75 .run = run, 76 .cleanup = cleanup, 77 }; 78 REGISTER_SCX_TEST(&prog_run) 79