1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * Copyright (c) 2023 Meta Platforms, Inc. and affiliates. 4 * Copyright (c) 2023 David Vernet <dvernet@meta.com> 5 * Copyright (c) 2023 Tejun Heo <tj@kernel.org> 6 */ 7 #include <bpf/bpf.h> 8 #include <scx/common.h> 9 #include <sys/wait.h> 10 #include <unistd.h> 11 #include "select_cpu_dispatch_bad_dsq.bpf.skel.h" 12 #include "scx_test.h" 13 setup(void ** ctx)14static enum scx_test_status setup(void **ctx) 15 { 16 struct select_cpu_dispatch_bad_dsq *skel; 17 18 skel = select_cpu_dispatch_bad_dsq__open_and_load(); 19 SCX_FAIL_IF(!skel, "Failed to open and load skel"); 20 *ctx = skel; 21 22 return SCX_TEST_PASS; 23 } 24 run(void * ctx)25static enum scx_test_status run(void *ctx) 26 { 27 struct select_cpu_dispatch_bad_dsq *skel = ctx; 28 struct bpf_link *link; 29 30 link = bpf_map__attach_struct_ops(skel->maps.select_cpu_dispatch_bad_dsq_ops); 31 SCX_FAIL_IF(!link, "Failed to attach scheduler"); 32 33 sleep(1); 34 35 SCX_EQ(skel->data->uei.kind, EXIT_KIND(SCX_EXIT_ERROR)); 36 bpf_link__destroy(link); 37 38 return SCX_TEST_PASS; 39 } 40 cleanup(void * ctx)41static void cleanup(void *ctx) 42 { 43 struct select_cpu_dispatch_bad_dsq *skel = ctx; 44 45 select_cpu_dispatch_bad_dsq__destroy(skel); 46 } 47 48 struct scx_test select_cpu_dispatch_bad_dsq = { 49 .name = "select_cpu_dispatch_bad_dsq", 50 .description = "Verify graceful failure if we direct-dispatch to a " 51 "bogus DSQ in ops.select_cpu()", 52 .setup = setup, 53 .run = run, 54 .cleanup = cleanup, 55 }; 56 REGISTER_SCX_TEST(&select_cpu_dispatch_bad_dsq) 57