diff options
Diffstat (limited to 'tools/bpf/bpftool/prog.c')
| -rw-r--r-- | tools/bpf/bpftool/prog.c | 244 |
1 files changed, 184 insertions, 60 deletions
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c index ccee180dfb76..cb18429818ec 100644 --- a/tools/bpf/bpftool/prog.c +++ b/tools/bpf/bpftool/prog.c @@ -47,6 +47,7 @@ #include <linux/err.h> #include <bpf.h> +#include <btf.h> #include <libbpf.h> #include "cfg.h" @@ -81,6 +82,7 @@ static const char * const attach_type_strings[] = { [BPF_SK_SKB_STREAM_PARSER] = "stream_parser", [BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict", [BPF_SK_MSG_VERDICT] = "msg_verdict", + [BPF_FLOW_DISSECTOR] = "flow_dissector", [__MAX_BPF_ATTACH_TYPE] = NULL, }; @@ -449,14 +451,19 @@ static int do_dump(int argc, char **argv) struct bpf_prog_info info = {}; unsigned int *func_lens = NULL; const char *disasm_opt = NULL; + unsigned int finfo_rec_size; unsigned int nr_func_ksyms; unsigned int nr_func_lens; struct dump_data dd = {}; __u32 len = sizeof(info); + struct btf *btf = NULL; + void *func_info = NULL; + unsigned int finfo_cnt; unsigned int buf_size; char *filepath = NULL; bool opcodes = false; bool visual = false; + char func_sig[1024]; unsigned char *buf; __u32 *member_len; __u64 *member_ptr; @@ -465,6 +472,9 @@ static int do_dump(int argc, char **argv) int fd; if (is_prefix(*argv, "jited")) { + if (disasm_init()) + return -1; + member_len = &info.jited_prog_len; member_ptr = &info.jited_prog_insns; } else if (is_prefix(*argv, "xlated")) { @@ -546,6 +556,17 @@ static int do_dump(int argc, char **argv) } } + finfo_cnt = info.func_info_cnt; + finfo_rec_size = info.func_info_rec_size; + if (finfo_cnt && finfo_rec_size) { + func_info = malloc(finfo_cnt * finfo_rec_size); + if (!func_info) { + p_err("mem alloc failed"); + close(fd); + goto err_free; + } + } + memset(&info, 0, sizeof(info)); *member_ptr = ptr_to_u64(buf); @@ -554,6 +575,9 @@ static int do_dump(int argc, char **argv) info.nr_jited_ksyms = nr_func_ksyms; info.jited_func_lens = ptr_to_u64(func_lens); info.nr_jited_func_lens = nr_func_lens; + info.func_info_cnt = finfo_cnt; + info.func_info_rec_size = finfo_rec_size; + info.func_info = ptr_to_u64(func_info); err = bpf_obj_get_info_by_fd(fd, &info, &len); close(fd); @@ -577,6 +601,18 @@ static int do_dump(int argc, char **argv) goto err_free; } + if (info.func_info_cnt != finfo_cnt) { + p_err("incorrect func_info_cnt %d vs. expected %d", + info.func_info_cnt, finfo_cnt); + goto err_free; + } + + if (info.func_info_rec_size != finfo_rec_size) { + p_err("incorrect func_info_rec_size %d vs. expected %d", + info.func_info_rec_size, finfo_rec_size); + goto err_free; + } + if ((member_len == &info.jited_prog_len && info.jited_prog_insns == 0) || (member_len == &info.xlated_prog_len && @@ -585,6 +621,11 @@ static int do_dump(int argc, char **argv) goto err_free; } + if (info.btf_id && btf_get_from_id(info.btf_id, &btf)) { + p_err("failed to get btf"); + goto err_free; + } + if (filepath) { fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600); if (fd < 0) { @@ -617,6 +658,7 @@ static int do_dump(int argc, char **argv) if (info.nr_jited_func_lens && info.jited_func_lens) { struct kernel_sym *sym = NULL; + struct bpf_func_info *record; char sym_name[SYM_MAX_NAME]; unsigned char *img = buf; __u64 *ksyms = NULL; @@ -643,12 +685,25 @@ static int do_dump(int argc, char **argv) strcpy(sym_name, "unknown"); } + if (func_info) { + record = func_info + i * finfo_rec_size; + btf_dumper_type_only(btf, record->type_id, + func_sig, + sizeof(func_sig)); + } + if (json_output) { jsonw_start_object(json_wtr); + if (func_info && func_sig[0] != '\0') { + jsonw_name(json_wtr, "proto"); + jsonw_string(json_wtr, func_sig); + } jsonw_name(json_wtr, "name"); jsonw_string(json_wtr, sym_name); jsonw_name(json_wtr, "insns"); } else { + if (func_info && func_sig[0] != '\0') + printf("%s:\n", func_sig); printf("%s:\n", sym_name); } @@ -677,6 +732,9 @@ static int do_dump(int argc, char **argv) kernel_syms_load(&dd); dd.nr_jited_ksyms = info.nr_jited_ksyms; dd.jited_ksyms = (__u64 *) info.jited_ksyms; + dd.btf = btf; + dd.func_info = func_info; + dd.finfo_rec_size = finfo_rec_size; if (json_output) dump_xlated_json(&dd, buf, *member_len, opcodes); @@ -688,12 +746,14 @@ static int do_dump(int argc, char **argv) free(buf); free(func_ksyms); free(func_lens); + free(func_info); return 0; err_free: free(buf); free(func_ksyms); free(func_lens); + free(func_info); return -1; } @@ -720,30 +780,49 @@ int map_replace_compar(const void *p1, const void *p2) return a->idx - b->idx; } -static int do_attach(int argc, char **argv) +static int parse_attach_detach_args(int argc, char **argv, int *progfd, + enum bpf_attach_type *attach_type, + int *mapfd) { - enum bpf_attach_type attach_type; - int err, mapfd, progfd; - - if (!REQ_ARGS(5)) { - p_err("too few parameters for map attach"); + if (!REQ_ARGS(3)) return -EINVAL; - } - progfd = prog_parse_fd(&argc, &argv); - if (progfd < 0) - return progfd; + *progfd = prog_parse_fd(&argc, &argv); + if (*progfd < 0) + return *progfd; - attach_type = parse_attach_type(*argv); - if (attach_type == __MAX_BPF_ATTACH_TYPE) { - p_err("invalid attach type"); + *attach_type = parse_attach_type(*argv); + if (*attach_type == __MAX_BPF_ATTACH_TYPE) { + p_err("invalid attach/detach type"); return -EINVAL; } + + if (*attach_type == BPF_FLOW_DISSECTOR) { + *mapfd = -1; + return 0; + } + NEXT_ARG(); + if (!REQ_ARGS(2)) + return -EINVAL; - mapfd = map_parse_fd(&argc, &argv); - if (mapfd < 0) - return mapfd; + *mapfd = map_parse_fd(&argc, &argv); + if (*mapfd < 0) + return *mapfd; + + return 0; +} + +static int do_attach(int argc, char **argv) +{ + enum bpf_attach_type attach_type; + int err, progfd; + int mapfd; + + err = parse_attach_detach_args(argc, argv, + &progfd, &attach_type, &mapfd); + if (err) + return err; err = bpf_prog_attach(progfd, mapfd, attach_type, 0); if (err) { @@ -759,27 +838,13 @@ static int do_attach(int argc, char **argv) static int do_detach(int argc, char **argv) { enum bpf_attach_type attach_type; - int err, mapfd, progfd; - - if (!REQ_ARGS(5)) { - p_err("too few parameters for map detach"); - return -EINVAL; - } + int err, progfd; + int mapfd; - progfd = prog_parse_fd(&argc, &argv); - if (progfd < 0) - return progfd; - - attach_type = parse_attach_type(*argv); - if (attach_type == __MAX_BPF_ATTACH_TYPE) { - p_err("invalid attach type"); - return -EINVAL; - } - NEXT_ARG(); - - mapfd = map_parse_fd(&argc, &argv); - if (mapfd < 0) - return mapfd; + err = parse_attach_detach_args(argc, argv, + &progfd, &attach_type, &mapfd); + if (err) + return err; err = bpf_prog_detach2(progfd, mapfd, attach_type); if (err) { @@ -791,15 +856,17 @@ static int do_detach(int argc, char **argv) jsonw_null(json_wtr); return 0; } -static int do_load(int argc, char **argv) + +static int load_with_options(int argc, char **argv, bool first_prog_only) { enum bpf_attach_type expected_attach_type; struct bpf_object_open_attr attr = { .prog_type = BPF_PROG_TYPE_UNSPEC, }; struct map_replace *map_replace = NULL; + struct bpf_program *prog = NULL, *pos; unsigned int old_map_fds = 0; - struct bpf_program *prog; + const char *pinmaps = NULL; struct bpf_object *obj; struct bpf_map *map; const char *pinfile; @@ -908,6 +975,13 @@ static int do_load(int argc, char **argv) goto err_free_reuse_maps; } NEXT_ARG(); + } else if (is_prefix(*argv, "pinmaps")) { + NEXT_ARG(); + + if (!REQ_ARGS(1)) + goto err_free_reuse_maps; + + pinmaps = GET_ARG(); } else { p_err("expected no more arguments, 'type', 'map' or 'dev', got: '%s'?", *argv); @@ -921,26 +995,25 @@ static int do_load(int argc, char **argv) goto err_free_reuse_maps; } - prog = bpf_program__next(NULL, obj); - if (!prog) { - p_err("object file doesn't contain any bpf program"); - goto err_close_obj; - } + bpf_object__for_each_program(pos, obj) { + enum bpf_prog_type prog_type = attr.prog_type; - bpf_program__set_ifindex(prog, ifindex); - if (attr.prog_type == BPF_PROG_TYPE_UNSPEC) { - const char *sec_name = bpf_program__title(prog, false); + if (attr.prog_type == BPF_PROG_TYPE_UNSPEC) { + const char *sec_name = bpf_program__title(pos, false); - err = libbpf_prog_type_by_name(sec_name, &attr.prog_type, - &expected_attach_type); - if (err < 0) { - p_err("failed to guess program type based on section name %s\n", - sec_name); - goto err_close_obj; + err = libbpf_prog_type_by_name(sec_name, &prog_type, + &expected_attach_type); + if (err < 0) { + p_err("failed to guess program type based on section name %s\n", + sec_name); + goto err_close_obj; + } } + + bpf_program__set_ifindex(pos, ifindex); + bpf_program__set_type(pos, prog_type); + bpf_program__set_expected_attach_type(pos, expected_attach_type); } - bpf_program__set_type(prog, attr.prog_type); - bpf_program__set_expected_attach_type(prog, expected_attach_type); qsort(map_replace, old_map_fds, sizeof(*map_replace), map_replace_compar); @@ -998,15 +1071,47 @@ static int do_load(int argc, char **argv) goto err_close_obj; } + set_max_rlimit(); + err = bpf_object__load(obj); if (err) { p_err("failed to load object file"); goto err_close_obj; } - if (do_pin_fd(bpf_program__fd(prog), pinfile)) + err = mount_bpffs_for_pin(pinfile); + if (err) goto err_close_obj; + if (first_prog_only) { + prog = bpf_program__next(NULL, obj); + if (!prog) { + p_err("object file doesn't contain any bpf program"); + goto err_close_obj; + } + + err = bpf_obj_pin(bpf_program__fd(prog), pinfile); + if (err) { + p_err("failed to pin program %s", + bpf_program__title(prog, false)); + goto err_close_obj; + } + } else { + err = bpf_object__pin_programs(obj, pinfile); + if (err) { + p_err("failed to pin all programs"); + goto err_close_obj; + } + } + + if (pinmaps) { + err = bpf_object__pin_maps(obj, pinmaps); + if (err) { + p_err("failed to pin all maps"); + goto err_unpin; + } + } + if (json_output) jsonw_null(json_wtr); @@ -1017,6 +1122,11 @@ static int do_load(int argc, char **argv) return 0; +err_unpin: + if (first_prog_only) + unlink(pinfile); + else + bpf_object__unpin_programs(obj, pinfile); err_close_obj: bpf_object__close(obj); err_free_reuse_maps: @@ -1026,6 +1136,16 @@ err_free_reuse_maps: return -1; } +static int do_load(int argc, char **argv) +{ + return load_with_options(argc, argv, true); +} + +static int do_loadall(int argc, char **argv) +{ + return load_with_options(argc, argv, false); +} + static int do_help(int argc, char **argv) { if (json_output) { @@ -1038,10 +1158,12 @@ static int do_help(int argc, char **argv) " %s %s dump xlated PROG [{ file FILE | opcodes | visual }]\n" " %s %s dump jited PROG [{ file FILE | opcodes }]\n" " %s %s pin PROG FILE\n" - " %s %s load OBJ FILE [type TYPE] [dev NAME] \\\n" - " [map { idx IDX | name NAME } MAP]\n" - " %s %s attach PROG ATTACH_TYPE MAP\n" - " %s %s detach PROG ATTACH_TYPE MAP\n" + " %s %s { load | loadall } OBJ PATH \\\n" + " [type TYPE] [dev NAME] \\\n" + " [map { idx IDX | name NAME } MAP]\\\n" + " [pinmaps MAP_DIR]\n" + " %s %s attach PROG ATTACH_TYPE [MAP]\n" + " %s %s detach PROG ATTACH_TYPE [MAP]\n" " %s %s help\n" "\n" " " HELP_SPEC_MAP "\n" @@ -1053,7 +1175,8 @@ static int do_help(int argc, char **argv) " cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n" " cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n" " cgroup/sendmsg4 | cgroup/sendmsg6 }\n" - " ATTACH_TYPE := { msg_verdict | skb_verdict | skb_parse }\n" + " ATTACH_TYPE := { msg_verdict | skb_verdict | skb_parse |\n" + " flow_dissector }\n" " " HELP_SPEC_OPTIONS "\n" "", bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2], @@ -1070,6 +1193,7 @@ static const struct cmd cmds[] = { { "dump", do_dump }, { "pin", do_pin }, { "load", do_load }, + { "loadall", do_loadall }, { "attach", do_attach }, { "detach", do_detach }, { 0 } |