diff options
Diffstat (limited to 'tools/testing/selftests/bpf/test_btf.c')
-rw-r--r-- | tools/testing/selftests/bpf/test_btf.c | 923 |
1 files changed, 909 insertions, 14 deletions
diff --git a/tools/testing/selftests/bpf/test_btf.c b/tools/testing/selftests/bpf/test_btf.c index f42b3396d622..bcbda7037840 100644 --- a/tools/testing/selftests/bpf/test_btf.c +++ b/tools/testing/selftests/bpf/test_btf.c @@ -5,6 +5,7 @@ #include <linux/btf.h> #include <linux/err.h> #include <linux/kernel.h> +#include <linux/filter.h> #include <bpf/bpf.h> #include <sys/resource.h> #include <libelf.h> @@ -22,9 +23,13 @@ #include "bpf_rlimit.h" #include "bpf_util.h" +#define MAX_INSNS 512 +#define MAX_SUBPROGS 16 + static uint32_t pass_cnt; static uint32_t error_cnt; static uint32_t skip_cnt; +static bool jit_enabled; #define CHECK(condition, format...) ({ \ int __ret = !!(condition); \ @@ -60,6 +65,24 @@ static int __base_pr(const char *format, ...) return err; } +static bool is_jit_enabled(void) +{ + const char *jit_sysctl = "/proc/sys/net/core/bpf_jit_enable"; + bool enabled = false; + int sysctl_fd; + + sysctl_fd = open(jit_sysctl, 0, O_RDONLY); + if (sysctl_fd != -1) { + char tmpc; + + if (read(sysctl_fd, &tmpc, sizeof(tmpc)) == 1) + enabled = (tmpc != '0'); + close(sysctl_fd); + } + + return enabled; +} + #define BTF_INFO_ENC(kind, root, vlen) \ ((!!(root) << 31) | ((kind) << 24) | ((vlen) & BTF_MAX_VLEN)) @@ -85,8 +108,20 @@ static int __base_pr(const char *format, ...) #define BTF_TYPEDEF_ENC(name, type) \ BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_TYPEDEF, 0, 0), type) -#define BTF_PTR_ENC(name, type) \ - BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), type) +#define BTF_PTR_ENC(type) \ + BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_PTR, 0, 0), type) + +#define BTF_CONST_ENC(type) \ + BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_CONST, 0, 0), type) + +#define BTF_FUNC_PROTO_ENC(ret_type, nargs) \ + BTF_TYPE_ENC(0, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, nargs), ret_type) + +#define BTF_FUNC_PROTO_ARG_ENC(name, type) \ + (name), (type) + +#define BTF_FUNC_ENC(name, func_proto) \ + BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_FUNC, 0, 0), func_proto) #define BTF_END_RAW 0xdeadbeef #define NAME_TBD 0xdeadb33f @@ -103,6 +138,7 @@ static struct args { bool get_info_test; bool pprint_test; bool always_log; + bool func_type_test; } args; static char btf_log_buf[BTF_LOG_BUF_SIZE]; @@ -1374,6 +1410,464 @@ static struct btf_raw_test raw_tests[] = { .map_create_err = true, }, +{ + .descr = "func proto (int (*)(int, unsigned int))", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* int (*)(int, unsigned int) */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (vararg)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int, unsigned int, ...) */ + BTF_FUNC_PROTO_ENC(0, 3), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_FUNC_PROTO_ARG_ENC(0, 0), + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (vararg with name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b, ... c) */ + BTF_FUNC_PROTO_ENC(0, 3), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 0), + BTF_END_RAW, + }, + .str_sec = "\0a\0b\0c", + .str_sec_size = sizeof("\0a\0b\0c"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#3", +}, + +{ + .descr = "func proto (arg after vararg)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, ..., unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 3), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 0), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_END_RAW, + }, + .str_sec = "\0a\0b", + .str_sec_size = sizeof("\0a\0b"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#2", +}, + +{ + .descr = "func proto (CONST=>TYPEDEF=>PTR=>FUNC_PROTO)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* typedef void (*func_ptr)(int, unsigned int) */ + BTF_TYPEDEF_ENC(NAME_TBD, 5), /* [3] */ + /* const func_ptr */ + BTF_CONST_ENC(3), /* [4] */ + BTF_PTR_ENC(6), /* [5] */ + BTF_FUNC_PROTO_ENC(0, 2), /* [6] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "\0func_ptr", + .str_sec_size = sizeof("\0func_ptr"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (CONST=>TYPEDEF=>FUNC_PROTO)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + BTF_CONST_ENC(4), /* [3] */ + BTF_TYPEDEF_ENC(NAME_TBD, 5), /* [4] */ + BTF_FUNC_PROTO_ENC(0, 2), /* [5] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "\0func_typedef", + .str_sec_size = sizeof("\0func_typedef"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid type_id", +}, + +{ + .descr = "func proto (btf_resolve(arg))", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + /* void (*)(const void *) */ + BTF_FUNC_PROTO_ENC(0, 1), /* [2] */ + BTF_FUNC_PROTO_ARG_ENC(0, 3), + BTF_CONST_ENC(4), /* [3] */ + BTF_PTR_ENC(0), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (Not all arg has name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_END_RAW, + }, + .str_sec = "\0b", + .str_sec_size = sizeof("\0b"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func proto (Bad arg name_off)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int <bad_name_off>) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(0xffffffff, 2), + BTF_END_RAW, + }, + .str_sec = "\0a", + .str_sec_size = sizeof("\0a"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#2", +}, + +{ + .descr = "func proto (Bad arg name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int !!!) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_END_RAW, + }, + .str_sec = "\0a\0!!!", + .str_sec_size = sizeof("\0a\0!!!"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#2", +}, + +{ + .descr = "func proto (Invalid return type)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* <bad_ret_type> (*)(int, unsigned int) */ + BTF_FUNC_PROTO_ENC(100, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid return type", +}, + +{ + .descr = "func proto (with func name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void func_proto(int, unsigned int) */ + BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_FUNC_PROTO, 0, 2), 0), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + BTF_END_RAW, + }, + .str_sec = "\0func_proto", + .str_sec_size = sizeof("\0func_proto"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid name", +}, + +{ + .descr = "func proto (const void arg)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(const void) */ + BTF_FUNC_PROTO_ENC(0, 1), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(0, 4), + BTF_CONST_ENC(0), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "", + .str_sec_size = sizeof(""), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_proto_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#1", +}, + +{ + .descr = "func (void func(int a, unsigned int b))", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + /* void func(int a, unsigned int b) */ + BTF_FUNC_ENC(NAME_TBD, 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0b\0func", + .str_sec_size = sizeof("\0a\0b\0func"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, +}, + +{ + .descr = "func (No func name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + /* void <no_name>(int a, unsigned int b) */ + BTF_FUNC_ENC(0, 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0b", + .str_sec_size = sizeof("\0a\0b"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid name", +}, + +{ + .descr = "func (Invalid func name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + /* void !!!(int a, unsigned int b) */ + BTF_FUNC_ENC(NAME_TBD, 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0b\0!!!", + .str_sec_size = sizeof("\0a\0b\0!!!"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid name", +}, + +{ + .descr = "func (Some arg has no name)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(0, 2), + /* void func(int a, unsigned int) */ + BTF_FUNC_ENC(NAME_TBD, 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0func", + .str_sec_size = sizeof("\0a\0func"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid arg#2", +}, + +{ + .descr = "func (Non zero vlen)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(0, 0, 0, 32, 4), /* [2] */ + /* void (*)(int a, unsigned int b) */ + BTF_FUNC_PROTO_ENC(0, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + /* void func(int a, unsigned int b) */ + BTF_TYPE_ENC(NAME_TBD, BTF_INFO_ENC(BTF_KIND_FUNC, 0, 2), 3), /* [4] */ + BTF_END_RAW, + }, + .str_sec = "\0a\0b\0func", + .str_sec_size = sizeof("\0a\0b\0func"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "vlen != 0", +}, + +{ + .descr = "func (Not referring to FUNC_PROTO)", + .raw_types = { + BTF_TYPE_INT_ENC(0, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_FUNC_ENC(NAME_TBD, 1), /* [2] */ + BTF_END_RAW, + }, + .str_sec = "\0func", + .str_sec_size = sizeof("\0func"), + .map_type = BPF_MAP_TYPE_ARRAY, + .map_name = "func_type_check_btf", + .key_size = sizeof(int), + .value_size = sizeof(int), + .key_type_id = 1, + .value_type_id = 1, + .max_entries = 4, + .btf_load_err = true, + .err_str = "Invalid type_id", +}, + }; /* struct btf_raw_test raw_tests[] */ static const char *get_next_str(const char *start, const char *end) @@ -1940,13 +2434,13 @@ static struct btf_file_test file_tests[] = { }, }; -static int file_has_btf_elf(const char *fn) +static int file_has_btf_elf(const char *fn, bool *has_btf_ext) { Elf_Scn *scn = NULL; GElf_Ehdr ehdr; + int ret = 0; int elf_fd; Elf *elf; - int ret; if (CHECK(elf_version(EV_CURRENT) == EV_NONE, "elf_version(EV_CURRENT) == EV_NONE")) @@ -1978,14 +2472,12 @@ static int file_has_btf_elf(const char *fn) } sh_name = elf_strptr(elf, ehdr.e_shstrndx, sh.sh_name); - if (!strcmp(sh_name, BTF_ELF_SEC)) { + if (!strcmp(sh_name, BTF_ELF_SEC)) ret = 1; - goto done; - } + if (!strcmp(sh_name, BTF_EXT_ELF_SEC)) + *has_btf_ext = true; } - ret = 0; - done: close(elf_fd); elf_end(elf); @@ -1995,15 +2487,24 @@ done: static int do_test_file(unsigned int test_num) { const struct btf_file_test *test = &file_tests[test_num - 1]; + const char *expected_fnames[] = {"_dummy_tracepoint", + "test_long_fname_1", + "test_long_fname_2"}; + struct bpf_prog_info info = {}; struct bpf_object *obj = NULL; + struct bpf_func_info *finfo; struct bpf_program *prog; + __u32 info_len, rec_size; + bool has_btf_ext = false; + struct btf *btf = NULL; + void *func_info = NULL; struct bpf_map *map; - int err; + int i, err, prog_fd; fprintf(stderr, "BTF libbpf test[%u] (%s): ", test_num, test->file); - err = file_has_btf_elf(test->file); + err = file_has_btf_elf(test->file, &has_btf_ext); if (err == -1) return err; @@ -2031,6 +2532,7 @@ static int do_test_file(unsigned int test_num) err = bpf_object__load(obj); if (CHECK(err < 0, "bpf_object__load: %d", err)) goto done; + prog_fd = bpf_program__fd(prog); map = bpf_object__find_map_by_name(obj, "btf_map"); if (CHECK(!map, "btf_map not found")) { @@ -2045,9 +2547,100 @@ static int do_test_file(unsigned int test_num) test->btf_kv_notfound)) goto done; + if (!jit_enabled || !has_btf_ext) + goto skip_jit; + + /* get necessary program info */ + info_len = sizeof(struct bpf_prog_info); + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + + if (CHECK(err == -1, "invalid get info (1st) errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (CHECK(info.func_info_cnt != 3, + "incorrect info.func_info_cnt (1st) %d", + info.func_info_cnt)) { + err = -1; + goto done; + } + rec_size = info.func_info_rec_size; + if (CHECK(rec_size < 4, + "incorrect info.func_info_rec_size (1st) %d\n", rec_size)) { + err = -1; + goto done; + } + + func_info = malloc(info.func_info_cnt * rec_size); + if (CHECK(!func_info, "out of memory")) { + err = -1; + goto done; + } + + /* reset info to only retrieve func_info related data */ + memset(&info, 0, sizeof(info)); + info.func_info_cnt = 3; + info.func_info_rec_size = rec_size; + info.func_info = ptr_to_u64(func_info); + + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + + if (CHECK(err == -1, "invalid get info (2nd) errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (CHECK(info.func_info_cnt != 3, + "incorrect info.func_info_cnt (2nd) %d", + info.func_info_cnt)) { + err = -1; + goto done; + } + if (CHECK(info.func_info_rec_size != rec_size, + "incorrect info.func_info_rec_size (2nd) %d", + info.func_info_rec_size)) { + err = -1; + goto done; + } + + err = btf_get_from_id(info.btf_id, &btf); + if (CHECK(err, "cannot get btf from kernel, err: %d", err)) + goto done; + + /* check three functions */ + finfo = func_info; + for (i = 0; i < 3; i++) { + const struct btf_type *t; + const char *fname; + + t = btf__type_by_id(btf, finfo->type_id); + if (CHECK(!t, "btf__type_by_id failure: id %u", + finfo->type_id)) { + err = -1; + goto done; + } + + fname = btf__name_by_offset(btf, t->name_off); + err = strcmp(fname, expected_fnames[i]); + /* for the second and third functions in .text section, + * the compiler may order them either way. + */ + if (i && err) + err = strcmp(fname, expected_fnames[3 - i]); + if (CHECK(err, "incorrect fname %s", fname ? : "")) { + err = -1; + goto done; + } + + finfo = (void *)finfo + rec_size; + } + +skip_jit: fprintf(stderr, "OK"); done: + free(func_info); bpf_object__close(obj); return err; } @@ -2477,16 +3070,310 @@ static int test_pprint(void) return err; } +static struct btf_func_type_test { + const char *descr; + const char *str_sec; + __u32 raw_types[MAX_NR_RAW_TYPES]; + __u32 str_sec_size; + struct bpf_insn insns[MAX_INSNS]; + __u32 prog_type; + __u32 func_info[MAX_SUBPROGS][2]; + __u32 func_info_rec_size; + __u32 func_info_cnt; + bool expected_prog_load_failure; +} func_type_test[] = { +{ + .descr = "func_type (main func + one sub)", + .raw_types = { + BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4), /* [2] */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ENC(1, 2), /* [4] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_ENC(NAME_TBD, 3), /* [5] */ + BTF_FUNC_ENC(NAME_TBD, 4), /* [6] */ + BTF_END_RAW, + }, + .str_sec = "\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB", + .str_sec_size = sizeof("\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB"), + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_EXIT_INSN(), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, + .func_info = { {0, 5}, {3, 6} }, + .func_info_rec_size = 8, + .func_info_cnt = 2, +}, + +{ + .descr = "func_type (Incorrect func_info_rec_size)", + .raw_types = { + BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4), /* [2] */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ENC(1, 2), /* [4] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_ENC(NAME_TBD, 3), /* [5] */ + BTF_FUNC_ENC(NAME_TBD, 4), /* [6] */ + BTF_END_RAW, + }, + .str_sec = "\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB", + .str_sec_size = sizeof("\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB"), + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_EXIT_INSN(), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, + .func_info = { {0, 5}, {3, 6} }, + .func_info_rec_size = 4, + .func_info_cnt = 2, + .expected_prog_load_failure = true, +}, + +{ + .descr = "func_type (Incorrect func_info_cnt)", + .raw_types = { + BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4), /* [2] */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ENC(1, 2), /* [4] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_ENC(NAME_TBD, 3), /* [5] */ + BTF_FUNC_ENC(NAME_TBD, 4), /* [6] */ + BTF_END_RAW, + }, + .str_sec = "\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB", + .str_sec_size = sizeof("\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB"), + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_EXIT_INSN(), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, + .func_info = { {0, 5}, {3, 6} }, + .func_info_rec_size = 8, + .func_info_cnt = 1, + .expected_prog_load_failure = true, +}, + +{ + .descr = "func_type (Incorrect bpf_func_info.insn_offset)", + .raw_types = { + BTF_TYPE_INT_ENC(NAME_TBD, BTF_INT_SIGNED, 0, 32, 4), /* [1] */ + BTF_TYPE_INT_ENC(NAME_TBD, 0, 0, 32, 4), /* [2] */ + BTF_FUNC_PROTO_ENC(1, 2), /* [3] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ENC(1, 2), /* [4] */ + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 2), + BTF_FUNC_PROTO_ARG_ENC(NAME_TBD, 1), + BTF_FUNC_ENC(NAME_TBD, 3), /* [5] */ + BTF_FUNC_ENC(NAME_TBD, 4), /* [6] */ + BTF_END_RAW, + }, + .str_sec = "\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB", + .str_sec_size = sizeof("\0int\0unsigned int\0a\0b\0c\0d\0funcA\0funcB"), + .insns = { + BPF_RAW_INSN(BPF_JMP | BPF_CALL, 0, 1, 0, 2), + BPF_MOV64_IMM(BPF_REG_0, 1), + BPF_EXIT_INSN(), + BPF_MOV64_IMM(BPF_REG_0, 2), + BPF_EXIT_INSN(), + }, + .prog_type = BPF_PROG_TYPE_TRACEPOINT, + .func_info = { {0, 5}, {2, 6} }, + .func_info_rec_size = 8, + .func_info_cnt = 2, + .expected_prog_load_failure = true, +}, + +}; + +static size_t probe_prog_length(const struct bpf_insn *fp) +{ + size_t len; + + for (len = MAX_INSNS - 1; len > 0; --len) + if (fp[len].code != 0 || fp[len].imm != 0) + break; + return len + 1; +} + +static int do_test_func_type(int test_num) +{ + const struct btf_func_type_test *test = &func_type_test[test_num]; + unsigned int raw_btf_size, info_len, rec_size; + int i, btf_fd = -1, prog_fd = -1, err = 0; + struct bpf_load_program_attr attr = {}; + void *raw_btf, *func_info = NULL; + struct bpf_prog_info info = {}; + struct bpf_func_info *finfo; + + fprintf(stderr, "%s......", test->descr); + raw_btf = btf_raw_create(&hdr_tmpl, test->raw_types, + test->str_sec, test->str_sec_size, + &raw_btf_size); + + if (!raw_btf) + return -1; + + *btf_log_buf = '\0'; + btf_fd = bpf_load_btf(raw_btf, raw_btf_size, + btf_log_buf, BTF_LOG_BUF_SIZE, + args.always_log); + free(raw_btf); + + if (CHECK(btf_fd == -1, "invalid btf_fd errno:%d", errno)) { + err = -1; + goto done; + } + + if (*btf_log_buf && args.always_log) + fprintf(stderr, "\n%s", btf_log_buf); + + attr.prog_type = test->prog_type; + attr.insns = test->insns; + attr.insns_cnt = probe_prog_length(attr.insns); + attr.license = "GPL"; + attr.prog_btf_fd = btf_fd; + attr.func_info_rec_size = test->func_info_rec_size; + attr.func_info_cnt = test->func_info_cnt; + attr.func_info = test->func_info; + + *btf_log_buf = '\0'; + prog_fd = bpf_load_program_xattr(&attr, btf_log_buf, + BTF_LOG_BUF_SIZE); + if (test->expected_prog_load_failure && prog_fd == -1) { + err = 0; + goto done; + } + if (CHECK(prog_fd == -1, "invalid prog_id errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (!jit_enabled) { + skip_cnt++; + fprintf(stderr, "SKIPPED, please enable sysctl bpf_jit_enable\n"); + err = 0; + goto done; + } + + /* get necessary lens */ + info_len = sizeof(struct bpf_prog_info); + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (CHECK(err == -1, "invalid get info (1st) errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (CHECK(info.func_info_cnt != 2, + "incorrect info.func_info_cnt (1st) %d\n", + info.func_info_cnt)) { + err = -1; + goto done; + } + rec_size = info.func_info_rec_size; + if (CHECK(rec_size < 4, + "incorrect info.func_info_rec_size (1st) %d\n", rec_size)) { + err = -1; + goto done; + } + + func_info = malloc(info.func_info_cnt * rec_size); + if (CHECK(!func_info, "out of memory")) { + err = -1; + goto done; + } + + /* reset info to only retrieve func_info related data */ + memset(&info, 0, sizeof(info)); + info.func_info_cnt = 2; + info.func_info_rec_size = rec_size; + info.func_info = ptr_to_u64(func_info); + err = bpf_obj_get_info_by_fd(prog_fd, &info, &info_len); + if (CHECK(err == -1, "invalid get info (2nd) errno:%d", errno)) { + fprintf(stderr, "%s\n", btf_log_buf); + err = -1; + goto done; + } + if (CHECK(info.func_info_cnt != 2, + "incorrect info.func_info_cnt (2nd) %d\n", + info.func_info_cnt)) { + err = -1; + goto done; + } + if (CHECK(info.func_info_rec_size != rec_size, + "incorrect info.func_info_rec_size (2nd) %d\n", + info.func_info_rec_size)) { + err = -1; + goto done; + } + + finfo = func_info; + for (i = 0; i < 2; i++) { + if (CHECK(finfo->type_id != test->func_info[i][1], + "incorrect func_type %u expected %u", + finfo->type_id, test->func_info[i][1])) { + err = -1; + goto done; + } + finfo = (void *)finfo + rec_size; + } + +done: + if (*btf_log_buf && (err || args.always_log)) + fprintf(stderr, "\n%s", btf_log_buf); + + if (btf_fd != -1) + close(btf_fd); + if (prog_fd != -1) + close(prog_fd); + free(func_info); + return err; +} + +static int test_func_type(void) +{ + unsigned int i; + int err = 0; + + for (i = 0; i < ARRAY_SIZE(func_type_test); i++) + err |= count_result(do_test_func_type(i)); + + return err; +} + static void usage(const char *cmd) { - fprintf(stderr, "Usage: %s [-l] [[-r test_num (1 - %zu)] | [-g test_num (1 - %zu)] | [-f test_num (1 - %zu)] | [-p]]\n", + fprintf(stderr, "Usage: %s [-l] [[-r test_num (1 - %zu)] |" + " [-g test_num (1 - %zu)] |" + " [-f test_num (1 - %zu)] | [-p] | [-k] ]\n", cmd, ARRAY_SIZE(raw_tests), ARRAY_SIZE(get_info_tests), ARRAY_SIZE(file_tests)); } static int parse_args(int argc, char **argv) { - const char *optstr = "lpf:r:g:"; + const char *optstr = "lpkf:r:g:"; int opt; while ((opt = getopt(argc, argv, optstr)) != -1) { @@ -2509,6 +3396,9 @@ static int parse_args(int argc, char **argv) case 'p': args.pprint_test = true; break; + case 'k': + args.func_type_test = true; + break; case 'h': usage(argv[0]); exit(0); @@ -2562,6 +3452,8 @@ int main(int argc, char **argv) if (args.always_log) libbpf_set_print(__base_pr, __base_pr, __base_pr); + jit_enabled = is_jit_enabled(); + if (args.raw_test) err |= test_raw(); @@ -2574,8 +3466,11 @@ int main(int argc, char **argv) if (args.pprint_test) err |= test_pprint(); + if (args.func_type_test) + err |= test_func_type(); + if (args.raw_test || args.get_info_test || args.file_test || - args.pprint_test) + args.pprint_test || args.func_type_test) goto done; err |= test_raw(); |