| Message ID | 20210802160556.1271747-1-hengqi.chen@gmail.com (mailing list archive) |
|---|---|
| State | Superseded |
| Delegated to: | BPF |
| Headers | show |
| Series | [bpf-next,v2] selftests/bpf: Test btf__load_vmlinux_btf/btf__load_module_btf APIs | expand |
On Mon, Aug 2, 2021 at 9:06 AM Hengqi Chen <hengqi.chen@gmail.com> wrote: > > Add test for btf__load_vmlinux_btf/btf__load_module_btf APIs. It first > checks that if btrfs module BTF exists, if yes, load module BTF and > check symbol existence. > > Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com> > --- > .../selftests/bpf/prog_tests/btf_module.c | 32 +++++++++++++++++++ > 1 file changed, 32 insertions(+) > create mode 100644 tools/testing/selftests/bpf/prog_tests/btf_module.c > > diff --git a/tools/testing/selftests/bpf/prog_tests/btf_module.c b/tools/testing/selftests/bpf/prog_tests/btf_module.c > new file mode 100644 > index 000000000000..9314a46e001c > --- /dev/null > +++ b/tools/testing/selftests/bpf/prog_tests/btf_module.c > @@ -0,0 +1,32 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* Copyright (c) 2021 Hengqi Chen */ > + > +#include <test_progs.h> > +#include <bpf/btf.h> > + > +static const char *module_path = "/sys/kernel/btf/btrfs"; > +static const char *module_name = "btrfs"; > + > +void test_btf_module() > +{ > + struct btf *vmlinux_btf, *module_btf; > + __s32 type_id; > + > + if (access(module_path, F_OK)) > + return; we shouldn't use btrfs module, as it might not be mounted in our CI environment. Good news is that selftests uses its own custom module to do various module-related logic. It's already preloaded for all tests, so you can just assume its existence (unless pre-loading fails, then error out). See how "bpf_testmod" is used in selftests. > + > + vmlinux_btf = btf__load_vmlinux_btf(); > + if (!ASSERT_OK_PTR(vmlinux_btf, "could not load vmlinux BTF")) > + return; > + > + module_btf = btf__load_module_btf(module_name, vmlinux_btf); > + if (!ASSERT_OK_PTR(module_btf, "could not load module BTF")) > + goto cleanup; > + > + type_id = btf__find_by_name(module_btf, "btrfs_file_open"); > + ASSERT_GT(type_id, 0, "func btrfs_file_open not found"); > + > +cleanup: > + btf__free(module_btf); > + btf__free(vmlinux_btf); > +} > -- > 2.25.1
diff --git a/tools/testing/selftests/bpf/prog_tests/btf_module.c b/tools/testing/selftests/bpf/prog_tests/btf_module.c new file mode 100644 index 000000000000..9314a46e001c --- /dev/null +++ b/tools/testing/selftests/bpf/prog_tests/btf_module.c @@ -0,0 +1,32 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2021 Hengqi Chen */ + +#include <test_progs.h> +#include <bpf/btf.h> + +static const char *module_path = "/sys/kernel/btf/btrfs"; +static const char *module_name = "btrfs"; + +void test_btf_module() +{ + struct btf *vmlinux_btf, *module_btf; + __s32 type_id; + + if (access(module_path, F_OK)) + return; + + vmlinux_btf = btf__load_vmlinux_btf(); + if (!ASSERT_OK_PTR(vmlinux_btf, "could not load vmlinux BTF")) + return; + + module_btf = btf__load_module_btf(module_name, vmlinux_btf); + if (!ASSERT_OK_PTR(module_btf, "could not load module BTF")) + goto cleanup; + + type_id = btf__find_by_name(module_btf, "btrfs_file_open"); + ASSERT_GT(type_id, 0, "func btrfs_file_open not found"); + +cleanup: + btf__free(module_btf); + btf__free(vmlinux_btf); +}
Add test for btf__load_vmlinux_btf/btf__load_module_btf APIs. It first checks that if btrfs module BTF exists, if yes, load module BTF and check symbol existence. Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com> --- .../selftests/bpf/prog_tests/btf_module.c | 32 +++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 tools/testing/selftests/bpf/prog_tests/btf_module.c -- 2.25.1