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ba95c74524
Add a new "bpftool prog run" subcommand to run a loaded program on input data (and possibly with input context) passed by the user. Print output data (and output context if relevant) into a file or into the console. Print return value and duration for the test run into the console. A "repeat" argument can be passed to run the program several times in a row. The command does not perform any kind of verification based on program type (Is this program type allowed to use an input context?) or on data consistency (Can I work with empty input data?), this is left to the kernel. Example invocation: # perl -e 'print "\x0" x 14' | ./bpftool prog run \ pinned /sys/fs/bpf/sample_ret0 \ data_in - data_out - repeat 5 0000000 0000 0000 0000 0000 0000 0000 0000 | ........ ...... Return value: 0, duration (average): 260ns When one of data_in or ctx_in is "-", bpftool reads from standard input, in binary format. Other formats (JSON, hexdump) might be supported (via an optional command line keyword like "data_fmt_in") in the future if relevant, but this would require doing more parsing in bpftool. v2: - Fix argument names for function check_single_stdin(). (Yonghong) Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com> Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com> Acked-by: Yonghong Song <yhs@fb.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
1451 lines
32 KiB
C
1451 lines
32 KiB
C
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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/* Copyright (C) 2017-2018 Netronome Systems, Inc. */
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#define _GNU_SOURCE
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#include <errno.h>
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#include <fcntl.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include <net/if.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <linux/err.h>
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#include <linux/sizes.h>
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#include <bpf.h>
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#include <btf.h>
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#include <libbpf.h>
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#include "cfg.h"
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#include "main.h"
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#include "xlated_dumper.h"
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static const char * const attach_type_strings[] = {
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[BPF_SK_SKB_STREAM_PARSER] = "stream_parser",
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[BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict",
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[BPF_SK_MSG_VERDICT] = "msg_verdict",
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[BPF_FLOW_DISSECTOR] = "flow_dissector",
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[__MAX_BPF_ATTACH_TYPE] = NULL,
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};
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static enum bpf_attach_type parse_attach_type(const char *str)
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{
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enum bpf_attach_type type;
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for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) {
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if (attach_type_strings[type] &&
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is_prefix(str, attach_type_strings[type]))
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return type;
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}
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return __MAX_BPF_ATTACH_TYPE;
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}
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static void print_boot_time(__u64 nsecs, char *buf, unsigned int size)
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{
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struct timespec real_time_ts, boot_time_ts;
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time_t wallclock_secs;
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struct tm load_tm;
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buf[--size] = '\0';
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if (clock_gettime(CLOCK_REALTIME, &real_time_ts) ||
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clock_gettime(CLOCK_BOOTTIME, &boot_time_ts)) {
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perror("Can't read clocks");
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snprintf(buf, size, "%llu", nsecs / 1000000000);
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return;
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}
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wallclock_secs = (real_time_ts.tv_sec - boot_time_ts.tv_sec) +
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(real_time_ts.tv_nsec - boot_time_ts.tv_nsec + nsecs) /
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1000000000;
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if (!localtime_r(&wallclock_secs, &load_tm)) {
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snprintf(buf, size, "%llu", nsecs / 1000000000);
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return;
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}
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if (json_output)
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strftime(buf, size, "%s", &load_tm);
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else
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strftime(buf, size, "%FT%T%z", &load_tm);
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}
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static int prog_fd_by_tag(unsigned char *tag)
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{
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unsigned int id = 0;
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int err;
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int fd;
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while (true) {
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struct bpf_prog_info info = {};
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__u32 len = sizeof(info);
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err = bpf_prog_get_next_id(id, &id);
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if (err) {
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p_err("%s", strerror(errno));
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return -1;
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}
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fd = bpf_prog_get_fd_by_id(id);
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if (fd < 0) {
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p_err("can't get prog by id (%u): %s",
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id, strerror(errno));
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return -1;
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}
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err = bpf_obj_get_info_by_fd(fd, &info, &len);
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if (err) {
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p_err("can't get prog info (%u): %s",
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id, strerror(errno));
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close(fd);
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return -1;
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}
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if (!memcmp(tag, info.tag, BPF_TAG_SIZE))
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return fd;
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close(fd);
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}
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}
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int prog_parse_fd(int *argc, char ***argv)
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{
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int fd;
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if (is_prefix(**argv, "id")) {
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unsigned int id;
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char *endptr;
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NEXT_ARGP();
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id = strtoul(**argv, &endptr, 0);
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if (*endptr) {
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p_err("can't parse %s as ID", **argv);
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return -1;
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}
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NEXT_ARGP();
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fd = bpf_prog_get_fd_by_id(id);
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if (fd < 0)
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p_err("get by id (%u): %s", id, strerror(errno));
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return fd;
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} else if (is_prefix(**argv, "tag")) {
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unsigned char tag[BPF_TAG_SIZE];
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NEXT_ARGP();
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if (sscanf(**argv, BPF_TAG_FMT, tag, tag + 1, tag + 2,
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tag + 3, tag + 4, tag + 5, tag + 6, tag + 7)
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!= BPF_TAG_SIZE) {
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p_err("can't parse tag");
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return -1;
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}
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NEXT_ARGP();
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return prog_fd_by_tag(tag);
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} else if (is_prefix(**argv, "pinned")) {
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char *path;
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NEXT_ARGP();
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path = **argv;
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NEXT_ARGP();
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return open_obj_pinned_any(path, BPF_OBJ_PROG);
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}
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p_err("expected 'id', 'tag' or 'pinned', got: '%s'?", **argv);
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return -1;
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}
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static void show_prog_maps(int fd, u32 num_maps)
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{
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struct bpf_prog_info info = {};
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__u32 len = sizeof(info);
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__u32 map_ids[num_maps];
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unsigned int i;
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int err;
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info.nr_map_ids = num_maps;
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info.map_ids = ptr_to_u64(map_ids);
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err = bpf_obj_get_info_by_fd(fd, &info, &len);
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if (err || !info.nr_map_ids)
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return;
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if (json_output) {
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jsonw_name(json_wtr, "map_ids");
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jsonw_start_array(json_wtr);
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for (i = 0; i < info.nr_map_ids; i++)
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jsonw_uint(json_wtr, map_ids[i]);
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jsonw_end_array(json_wtr);
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} else {
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printf(" map_ids ");
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for (i = 0; i < info.nr_map_ids; i++)
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printf("%u%s", map_ids[i],
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i == info.nr_map_ids - 1 ? "" : ",");
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}
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}
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static void print_prog_json(struct bpf_prog_info *info, int fd)
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{
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char *memlock;
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jsonw_start_object(json_wtr);
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jsonw_uint_field(json_wtr, "id", info->id);
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if (info->type < ARRAY_SIZE(prog_type_name))
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jsonw_string_field(json_wtr, "type",
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prog_type_name[info->type]);
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else
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jsonw_uint_field(json_wtr, "type", info->type);
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if (*info->name)
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jsonw_string_field(json_wtr, "name", info->name);
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jsonw_name(json_wtr, "tag");
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jsonw_printf(json_wtr, "\"" BPF_TAG_FMT "\"",
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info->tag[0], info->tag[1], info->tag[2], info->tag[3],
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info->tag[4], info->tag[5], info->tag[6], info->tag[7]);
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jsonw_bool_field(json_wtr, "gpl_compatible", info->gpl_compatible);
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if (info->run_time_ns) {
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jsonw_uint_field(json_wtr, "run_time_ns", info->run_time_ns);
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jsonw_uint_field(json_wtr, "run_cnt", info->run_cnt);
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}
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print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);
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if (info->load_time) {
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char buf[32];
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print_boot_time(info->load_time, buf, sizeof(buf));
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/* Piggy back on load_time, since 0 uid is a valid one */
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jsonw_name(json_wtr, "loaded_at");
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jsonw_printf(json_wtr, "%s", buf);
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jsonw_uint_field(json_wtr, "uid", info->created_by_uid);
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}
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jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len);
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if (info->jited_prog_len) {
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jsonw_bool_field(json_wtr, "jited", true);
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jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len);
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} else {
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jsonw_bool_field(json_wtr, "jited", false);
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}
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memlock = get_fdinfo(fd, "memlock");
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if (memlock)
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jsonw_int_field(json_wtr, "bytes_memlock", atoi(memlock));
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free(memlock);
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if (info->nr_map_ids)
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show_prog_maps(fd, info->nr_map_ids);
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if (info->btf_id)
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jsonw_int_field(json_wtr, "btf_id", info->btf_id);
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if (!hash_empty(prog_table.table)) {
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struct pinned_obj *obj;
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jsonw_name(json_wtr, "pinned");
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jsonw_start_array(json_wtr);
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hash_for_each_possible(prog_table.table, obj, hash, info->id) {
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if (obj->id == info->id)
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jsonw_string(json_wtr, obj->path);
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}
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jsonw_end_array(json_wtr);
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}
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jsonw_end_object(json_wtr);
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}
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static void print_prog_plain(struct bpf_prog_info *info, int fd)
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{
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char *memlock;
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printf("%u: ", info->id);
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if (info->type < ARRAY_SIZE(prog_type_name))
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printf("%s ", prog_type_name[info->type]);
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else
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printf("type %u ", info->type);
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if (*info->name)
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printf("name %s ", info->name);
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printf("tag ");
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fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");
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print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
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printf("%s", info->gpl_compatible ? " gpl" : "");
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if (info->run_time_ns)
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printf(" run_time_ns %lld run_cnt %lld",
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info->run_time_ns, info->run_cnt);
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printf("\n");
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if (info->load_time) {
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char buf[32];
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print_boot_time(info->load_time, buf, sizeof(buf));
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/* Piggy back on load_time, since 0 uid is a valid one */
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printf("\tloaded_at %s uid %u\n", buf, info->created_by_uid);
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}
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printf("\txlated %uB", info->xlated_prog_len);
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if (info->jited_prog_len)
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printf(" jited %uB", info->jited_prog_len);
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else
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printf(" not jited");
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memlock = get_fdinfo(fd, "memlock");
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if (memlock)
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printf(" memlock %sB", memlock);
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free(memlock);
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if (info->nr_map_ids)
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show_prog_maps(fd, info->nr_map_ids);
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if (!hash_empty(prog_table.table)) {
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struct pinned_obj *obj;
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hash_for_each_possible(prog_table.table, obj, hash, info->id) {
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if (obj->id == info->id)
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printf("\n\tpinned %s", obj->path);
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}
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}
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if (info->btf_id)
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printf("\n\tbtf_id %d", info->btf_id);
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printf("\n");
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}
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static int show_prog(int fd)
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{
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struct bpf_prog_info info = {};
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__u32 len = sizeof(info);
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int err;
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err = bpf_obj_get_info_by_fd(fd, &info, &len);
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if (err) {
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p_err("can't get prog info: %s", strerror(errno));
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return -1;
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}
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if (json_output)
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print_prog_json(&info, fd);
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else
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print_prog_plain(&info, fd);
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return 0;
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}
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static int do_show(int argc, char **argv)
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{
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__u32 id = 0;
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int err;
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int fd;
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if (show_pinned)
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build_pinned_obj_table(&prog_table, BPF_OBJ_PROG);
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if (argc == 2) {
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fd = prog_parse_fd(&argc, &argv);
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if (fd < 0)
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return -1;
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return show_prog(fd);
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}
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if (argc)
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return BAD_ARG();
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if (json_output)
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jsonw_start_array(json_wtr);
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while (true) {
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err = bpf_prog_get_next_id(id, &id);
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if (err) {
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if (errno == ENOENT) {
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err = 0;
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break;
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}
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p_err("can't get next program: %s%s", strerror(errno),
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errno == EINVAL ? " -- kernel too old?" : "");
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err = -1;
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break;
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}
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fd = bpf_prog_get_fd_by_id(id);
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if (fd < 0) {
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if (errno == ENOENT)
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continue;
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p_err("can't get prog by id (%u): %s",
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id, strerror(errno));
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err = -1;
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break;
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}
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err = show_prog(fd);
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close(fd);
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if (err)
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break;
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}
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if (json_output)
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jsonw_end_array(json_wtr);
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return err;
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}
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static int do_dump(int argc, char **argv)
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{
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struct bpf_prog_info_linear *info_linear;
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struct bpf_prog_linfo *prog_linfo = NULL;
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enum {DUMP_JITED, DUMP_XLATED} mode;
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const char *disasm_opt = NULL;
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struct bpf_prog_info *info;
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struct dump_data dd = {};
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void *func_info = NULL;
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struct btf *btf = NULL;
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char *filepath = NULL;
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bool opcodes = false;
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bool visual = false;
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char func_sig[1024];
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unsigned char *buf;
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bool linum = false;
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__u32 member_len;
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__u64 arrays;
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ssize_t n;
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int fd;
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if (is_prefix(*argv, "jited")) {
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if (disasm_init())
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return -1;
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mode = DUMP_JITED;
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} else if (is_prefix(*argv, "xlated")) {
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mode = DUMP_XLATED;
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} else {
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p_err("expected 'xlated' or 'jited', got: %s", *argv);
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return -1;
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}
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NEXT_ARG();
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if (argc < 2)
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usage();
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fd = prog_parse_fd(&argc, &argv);
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if (fd < 0)
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return -1;
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if (is_prefix(*argv, "file")) {
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NEXT_ARG();
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if (!argc) {
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p_err("expected file path");
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return -1;
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}
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filepath = *argv;
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NEXT_ARG();
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} else if (is_prefix(*argv, "opcodes")) {
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opcodes = true;
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NEXT_ARG();
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} else if (is_prefix(*argv, "visual")) {
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visual = true;
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NEXT_ARG();
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} else if (is_prefix(*argv, "linum")) {
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linum = true;
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NEXT_ARG();
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}
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if (argc) {
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usage();
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return -1;
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}
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if (mode == DUMP_JITED)
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arrays = 1UL << BPF_PROG_INFO_JITED_INSNS;
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else
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arrays = 1UL << BPF_PROG_INFO_XLATED_INSNS;
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arrays |= 1UL << BPF_PROG_INFO_JITED_KSYMS;
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arrays |= 1UL << BPF_PROG_INFO_JITED_FUNC_LENS;
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arrays |= 1UL << BPF_PROG_INFO_FUNC_INFO;
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arrays |= 1UL << BPF_PROG_INFO_LINE_INFO;
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arrays |= 1UL << BPF_PROG_INFO_JITED_LINE_INFO;
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info_linear = bpf_program__get_prog_info_linear(fd, arrays);
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close(fd);
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if (IS_ERR_OR_NULL(info_linear)) {
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p_err("can't get prog info: %s", strerror(errno));
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return -1;
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}
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info = &info_linear->info;
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if (mode == DUMP_JITED) {
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if (info->jited_prog_len == 0) {
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p_info("no instructions returned");
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goto err_free;
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}
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buf = (unsigned char *)(info->jited_prog_insns);
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member_len = info->jited_prog_len;
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} else { /* DUMP_XLATED */
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if (info->xlated_prog_len == 0) {
|
|
p_err("error retrieving insn dump: kernel.kptr_restrict set?");
|
|
goto err_free;
|
|
}
|
|
buf = (unsigned char *)info->xlated_prog_insns;
|
|
member_len = info->xlated_prog_len;
|
|
}
|
|
|
|
if (info->btf_id && btf__get_from_id(info->btf_id, &btf)) {
|
|
p_err("failed to get btf");
|
|
goto err_free;
|
|
}
|
|
|
|
func_info = (void *)info->func_info;
|
|
|
|
if (info->nr_line_info) {
|
|
prog_linfo = bpf_prog_linfo__new(info);
|
|
if (!prog_linfo)
|
|
p_info("error in processing bpf_line_info. continue without it.");
|
|
}
|
|
|
|
if (filepath) {
|
|
fd = open(filepath, O_WRONLY | O_CREAT | O_TRUNC, 0600);
|
|
if (fd < 0) {
|
|
p_err("can't open file %s: %s", filepath,
|
|
strerror(errno));
|
|
goto err_free;
|
|
}
|
|
|
|
n = write(fd, buf, member_len);
|
|
close(fd);
|
|
if (n != member_len) {
|
|
p_err("error writing output file: %s",
|
|
n < 0 ? strerror(errno) : "short write");
|
|
goto err_free;
|
|
}
|
|
|
|
if (json_output)
|
|
jsonw_null(json_wtr);
|
|
} else if (mode == DUMP_JITED) {
|
|
const char *name = NULL;
|
|
|
|
if (info->ifindex) {
|
|
name = ifindex_to_bfd_params(info->ifindex,
|
|
info->netns_dev,
|
|
info->netns_ino,
|
|
&disasm_opt);
|
|
if (!name)
|
|
goto err_free;
|
|
}
|
|
|
|
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;
|
|
__u32 *lens;
|
|
__u32 i;
|
|
if (info->nr_jited_ksyms) {
|
|
kernel_syms_load(&dd);
|
|
ksyms = (__u64 *) info->jited_ksyms;
|
|
}
|
|
|
|
if (json_output)
|
|
jsonw_start_array(json_wtr);
|
|
|
|
lens = (__u32 *) info->jited_func_lens;
|
|
for (i = 0; i < info->nr_jited_func_lens; i++) {
|
|
if (ksyms) {
|
|
sym = kernel_syms_search(&dd, ksyms[i]);
|
|
if (sym)
|
|
sprintf(sym_name, "%s", sym->name);
|
|
else
|
|
sprintf(sym_name, "0x%016llx", ksyms[i]);
|
|
} else {
|
|
strcpy(sym_name, "unknown");
|
|
}
|
|
|
|
if (func_info) {
|
|
record = func_info + i * info->func_info_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);
|
|
}
|
|
|
|
disasm_print_insn(img, lens[i], opcodes,
|
|
name, disasm_opt, btf,
|
|
prog_linfo, ksyms[i], i,
|
|
linum);
|
|
|
|
img += lens[i];
|
|
|
|
if (json_output)
|
|
jsonw_end_object(json_wtr);
|
|
else
|
|
printf("\n");
|
|
}
|
|
|
|
if (json_output)
|
|
jsonw_end_array(json_wtr);
|
|
} else {
|
|
disasm_print_insn(buf, member_len, opcodes, name,
|
|
disasm_opt, btf, NULL, 0, 0, false);
|
|
}
|
|
} else if (visual) {
|
|
if (json_output)
|
|
jsonw_null(json_wtr);
|
|
else
|
|
dump_xlated_cfg(buf, member_len);
|
|
} else {
|
|
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 = info->func_info_rec_size;
|
|
dd.prog_linfo = prog_linfo;
|
|
|
|
if (json_output)
|
|
dump_xlated_json(&dd, buf, member_len, opcodes,
|
|
linum);
|
|
else
|
|
dump_xlated_plain(&dd, buf, member_len, opcodes,
|
|
linum);
|
|
kernel_syms_destroy(&dd);
|
|
}
|
|
|
|
free(info_linear);
|
|
return 0;
|
|
|
|
err_free:
|
|
free(info_linear);
|
|
return -1;
|
|
}
|
|
|
|
static int do_pin(int argc, char **argv)
|
|
{
|
|
int err;
|
|
|
|
err = do_pin_any(argc, argv, bpf_prog_get_fd_by_id);
|
|
if (!err && json_output)
|
|
jsonw_null(json_wtr);
|
|
return err;
|
|
}
|
|
|
|
struct map_replace {
|
|
int idx;
|
|
int fd;
|
|
char *name;
|
|
};
|
|
|
|
static int map_replace_compar(const void *p1, const void *p2)
|
|
{
|
|
const struct map_replace *a = p1, *b = p2;
|
|
|
|
return a->idx - b->idx;
|
|
}
|
|
|
|
static int parse_attach_detach_args(int argc, char **argv, int *progfd,
|
|
enum bpf_attach_type *attach_type,
|
|
int *mapfd)
|
|
{
|
|
if (!REQ_ARGS(3))
|
|
return -EINVAL;
|
|
|
|
*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/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;
|
|
|
|
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) {
|
|
p_err("failed prog attach to map");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (json_output)
|
|
jsonw_null(json_wtr);
|
|
return 0;
|
|
}
|
|
|
|
static int do_detach(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_detach2(progfd, mapfd, attach_type);
|
|
if (err) {
|
|
p_err("failed prog detach from map");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (json_output)
|
|
jsonw_null(json_wtr);
|
|
return 0;
|
|
}
|
|
|
|
static int check_single_stdin(char *file_data_in, char *file_ctx_in)
|
|
{
|
|
if (file_data_in && file_ctx_in &&
|
|
!strcmp(file_data_in, "-") && !strcmp(file_ctx_in, "-")) {
|
|
p_err("cannot use standard input for both data_in and ctx_in");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int get_run_data(const char *fname, void **data_ptr, unsigned int *size)
|
|
{
|
|
size_t block_size = 256;
|
|
size_t buf_size = block_size;
|
|
size_t nb_read = 0;
|
|
void *tmp;
|
|
FILE *f;
|
|
|
|
if (!fname) {
|
|
*data_ptr = NULL;
|
|
*size = 0;
|
|
return 0;
|
|
}
|
|
|
|
if (!strcmp(fname, "-"))
|
|
f = stdin;
|
|
else
|
|
f = fopen(fname, "r");
|
|
if (!f) {
|
|
p_err("failed to open %s: %s", fname, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
*data_ptr = malloc(block_size);
|
|
if (!*data_ptr) {
|
|
p_err("failed to allocate memory for data_in/ctx_in: %s",
|
|
strerror(errno));
|
|
goto err_fclose;
|
|
}
|
|
|
|
while ((nb_read += fread(*data_ptr + nb_read, 1, block_size, f))) {
|
|
if (feof(f))
|
|
break;
|
|
if (ferror(f)) {
|
|
p_err("failed to read data_in/ctx_in from %s: %s",
|
|
fname, strerror(errno));
|
|
goto err_free;
|
|
}
|
|
if (nb_read > buf_size - block_size) {
|
|
if (buf_size == UINT32_MAX) {
|
|
p_err("data_in/ctx_in is too long (max: %d)",
|
|
UINT32_MAX);
|
|
goto err_free;
|
|
}
|
|
/* No space for fread()-ing next chunk; realloc() */
|
|
buf_size *= 2;
|
|
tmp = realloc(*data_ptr, buf_size);
|
|
if (!tmp) {
|
|
p_err("failed to reallocate data_in/ctx_in: %s",
|
|
strerror(errno));
|
|
goto err_free;
|
|
}
|
|
*data_ptr = tmp;
|
|
}
|
|
}
|
|
if (f != stdin)
|
|
fclose(f);
|
|
|
|
*size = nb_read;
|
|
return 0;
|
|
|
|
err_free:
|
|
free(*data_ptr);
|
|
*data_ptr = NULL;
|
|
err_fclose:
|
|
if (f != stdin)
|
|
fclose(f);
|
|
return -1;
|
|
}
|
|
|
|
static void hex_print(void *data, unsigned int size, FILE *f)
|
|
{
|
|
size_t i, j;
|
|
char c;
|
|
|
|
for (i = 0; i < size; i += 16) {
|
|
/* Row offset */
|
|
fprintf(f, "%07zx\t", i);
|
|
|
|
/* Hexadecimal values */
|
|
for (j = i; j < i + 16 && j < size; j++)
|
|
fprintf(f, "%02x%s", *(uint8_t *)(data + j),
|
|
j % 2 ? " " : "");
|
|
for (; j < i + 16; j++)
|
|
fprintf(f, " %s", j % 2 ? " " : "");
|
|
|
|
/* ASCII values (if relevant), '.' otherwise */
|
|
fprintf(f, "| ");
|
|
for (j = i; j < i + 16 && j < size; j++) {
|
|
c = *(char *)(data + j);
|
|
if (c < ' ' || c > '~')
|
|
c = '.';
|
|
fprintf(f, "%c%s", c, j == i + 7 ? " " : "");
|
|
}
|
|
|
|
fprintf(f, "\n");
|
|
}
|
|
}
|
|
|
|
static int
|
|
print_run_output(void *data, unsigned int size, const char *fname,
|
|
const char *json_key)
|
|
{
|
|
size_t nb_written;
|
|
FILE *f;
|
|
|
|
if (!fname)
|
|
return 0;
|
|
|
|
if (!strcmp(fname, "-")) {
|
|
f = stdout;
|
|
if (json_output) {
|
|
jsonw_name(json_wtr, json_key);
|
|
print_data_json(data, size);
|
|
} else {
|
|
hex_print(data, size, f);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
f = fopen(fname, "w");
|
|
if (!f) {
|
|
p_err("failed to open %s: %s", fname, strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
nb_written = fwrite(data, 1, size, f);
|
|
fclose(f);
|
|
if (nb_written != size) {
|
|
p_err("failed to write output data/ctx: %s", strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int alloc_run_data(void **data_ptr, unsigned int size_out)
|
|
{
|
|
*data_ptr = calloc(size_out, 1);
|
|
if (!*data_ptr) {
|
|
p_err("failed to allocate memory for output data/ctx: %s",
|
|
strerror(errno));
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int do_run(int argc, char **argv)
|
|
{
|
|
char *data_fname_in = NULL, *data_fname_out = NULL;
|
|
char *ctx_fname_in = NULL, *ctx_fname_out = NULL;
|
|
struct bpf_prog_test_run_attr test_attr = {0};
|
|
const unsigned int default_size = SZ_32K;
|
|
void *data_in = NULL, *data_out = NULL;
|
|
void *ctx_in = NULL, *ctx_out = NULL;
|
|
unsigned int repeat = 1;
|
|
int fd, err;
|
|
|
|
if (!REQ_ARGS(4))
|
|
return -1;
|
|
|
|
fd = prog_parse_fd(&argc, &argv);
|
|
if (fd < 0)
|
|
return -1;
|
|
|
|
while (argc) {
|
|
if (detect_common_prefix(*argv, "data_in", "data_out",
|
|
"data_size_out", NULL))
|
|
return -1;
|
|
if (detect_common_prefix(*argv, "ctx_in", "ctx_out",
|
|
"ctx_size_out", NULL))
|
|
return -1;
|
|
|
|
if (is_prefix(*argv, "data_in")) {
|
|
NEXT_ARG();
|
|
if (!REQ_ARGS(1))
|
|
return -1;
|
|
|
|
data_fname_in = GET_ARG();
|
|
if (check_single_stdin(data_fname_in, ctx_fname_in))
|
|
return -1;
|
|
} else if (is_prefix(*argv, "data_out")) {
|
|
NEXT_ARG();
|
|
if (!REQ_ARGS(1))
|
|
return -1;
|
|
|
|
data_fname_out = GET_ARG();
|
|
} else if (is_prefix(*argv, "data_size_out")) {
|
|
char *endptr;
|
|
|
|
NEXT_ARG();
|
|
if (!REQ_ARGS(1))
|
|
return -1;
|
|
|
|
test_attr.data_size_out = strtoul(*argv, &endptr, 0);
|
|
if (*endptr) {
|
|
p_err("can't parse %s as output data size",
|
|
*argv);
|
|
return -1;
|
|
}
|
|
NEXT_ARG();
|
|
} else if (is_prefix(*argv, "ctx_in")) {
|
|
NEXT_ARG();
|
|
if (!REQ_ARGS(1))
|
|
return -1;
|
|
|
|
ctx_fname_in = GET_ARG();
|
|
if (check_single_stdin(data_fname_in, ctx_fname_in))
|
|
return -1;
|
|
} else if (is_prefix(*argv, "ctx_out")) {
|
|
NEXT_ARG();
|
|
if (!REQ_ARGS(1))
|
|
return -1;
|
|
|
|
ctx_fname_out = GET_ARG();
|
|
} else if (is_prefix(*argv, "ctx_size_out")) {
|
|
char *endptr;
|
|
|
|
NEXT_ARG();
|
|
if (!REQ_ARGS(1))
|
|
return -1;
|
|
|
|
test_attr.ctx_size_out = strtoul(*argv, &endptr, 0);
|
|
if (*endptr) {
|
|
p_err("can't parse %s as output context size",
|
|
*argv);
|
|
return -1;
|
|
}
|
|
NEXT_ARG();
|
|
} else if (is_prefix(*argv, "repeat")) {
|
|
char *endptr;
|
|
|
|
NEXT_ARG();
|
|
if (!REQ_ARGS(1))
|
|
return -1;
|
|
|
|
repeat = strtoul(*argv, &endptr, 0);
|
|
if (*endptr) {
|
|
p_err("can't parse %s as repeat number",
|
|
*argv);
|
|
return -1;
|
|
}
|
|
NEXT_ARG();
|
|
} else {
|
|
p_err("expected no more arguments, 'data_in', 'data_out', 'data_size_out', 'ctx_in', 'ctx_out', 'ctx_size_out' or 'repeat', got: '%s'?",
|
|
*argv);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
err = get_run_data(data_fname_in, &data_in, &test_attr.data_size_in);
|
|
if (err)
|
|
return -1;
|
|
|
|
if (data_in) {
|
|
if (!test_attr.data_size_out)
|
|
test_attr.data_size_out = default_size;
|
|
err = alloc_run_data(&data_out, test_attr.data_size_out);
|
|
if (err)
|
|
goto free_data_in;
|
|
}
|
|
|
|
err = get_run_data(ctx_fname_in, &ctx_in, &test_attr.ctx_size_in);
|
|
if (err)
|
|
goto free_data_out;
|
|
|
|
if (ctx_in) {
|
|
if (!test_attr.ctx_size_out)
|
|
test_attr.ctx_size_out = default_size;
|
|
err = alloc_run_data(&ctx_out, test_attr.ctx_size_out);
|
|
if (err)
|
|
goto free_ctx_in;
|
|
}
|
|
|
|
test_attr.prog_fd = fd;
|
|
test_attr.repeat = repeat;
|
|
test_attr.data_in = data_in;
|
|
test_attr.data_out = data_out;
|
|
test_attr.ctx_in = ctx_in;
|
|
test_attr.ctx_out = ctx_out;
|
|
|
|
err = bpf_prog_test_run_xattr(&test_attr);
|
|
if (err) {
|
|
p_err("failed to run program: %s", strerror(errno));
|
|
goto free_ctx_out;
|
|
}
|
|
|
|
err = 0;
|
|
|
|
if (json_output)
|
|
jsonw_start_object(json_wtr); /* root */
|
|
|
|
/* Do not exit on errors occurring when printing output data/context,
|
|
* we still want to print return value and duration for program run.
|
|
*/
|
|
if (test_attr.data_size_out)
|
|
err += print_run_output(test_attr.data_out,
|
|
test_attr.data_size_out,
|
|
data_fname_out, "data_out");
|
|
if (test_attr.ctx_size_out)
|
|
err += print_run_output(test_attr.ctx_out,
|
|
test_attr.ctx_size_out,
|
|
ctx_fname_out, "ctx_out");
|
|
|
|
if (json_output) {
|
|
jsonw_uint_field(json_wtr, "retval", test_attr.retval);
|
|
jsonw_uint_field(json_wtr, "duration", test_attr.duration);
|
|
jsonw_end_object(json_wtr); /* root */
|
|
} else {
|
|
fprintf(stdout, "Return value: %u, duration%s: %uns\n",
|
|
test_attr.retval,
|
|
repeat > 1 ? " (average)" : "", test_attr.duration);
|
|
}
|
|
|
|
free_ctx_out:
|
|
free(ctx_out);
|
|
free_ctx_in:
|
|
free(ctx_in);
|
|
free_data_out:
|
|
free(data_out);
|
|
free_data_in:
|
|
free(data_in);
|
|
|
|
return err;
|
|
}
|
|
|
|
static int load_with_options(int argc, char **argv, bool first_prog_only)
|
|
{
|
|
struct bpf_object_load_attr load_attr = { 0 };
|
|
struct bpf_object_open_attr open_attr = {
|
|
.prog_type = BPF_PROG_TYPE_UNSPEC,
|
|
};
|
|
enum bpf_attach_type expected_attach_type;
|
|
struct map_replace *map_replace = NULL;
|
|
struct bpf_program *prog = NULL, *pos;
|
|
unsigned int old_map_fds = 0;
|
|
const char *pinmaps = NULL;
|
|
struct bpf_object *obj;
|
|
struct bpf_map *map;
|
|
const char *pinfile;
|
|
unsigned int i, j;
|
|
__u32 ifindex = 0;
|
|
int idx, err;
|
|
|
|
if (!REQ_ARGS(2))
|
|
return -1;
|
|
open_attr.file = GET_ARG();
|
|
pinfile = GET_ARG();
|
|
|
|
while (argc) {
|
|
if (is_prefix(*argv, "type")) {
|
|
char *type;
|
|
|
|
NEXT_ARG();
|
|
|
|
if (open_attr.prog_type != BPF_PROG_TYPE_UNSPEC) {
|
|
p_err("program type already specified");
|
|
goto err_free_reuse_maps;
|
|
}
|
|
if (!REQ_ARGS(1))
|
|
goto err_free_reuse_maps;
|
|
|
|
/* Put a '/' at the end of type to appease libbpf */
|
|
type = malloc(strlen(*argv) + 2);
|
|
if (!type) {
|
|
p_err("mem alloc failed");
|
|
goto err_free_reuse_maps;
|
|
}
|
|
*type = 0;
|
|
strcat(type, *argv);
|
|
strcat(type, "/");
|
|
|
|
err = libbpf_prog_type_by_name(type,
|
|
&open_attr.prog_type,
|
|
&expected_attach_type);
|
|
free(type);
|
|
if (err < 0)
|
|
goto err_free_reuse_maps;
|
|
|
|
NEXT_ARG();
|
|
} else if (is_prefix(*argv, "map")) {
|
|
void *new_map_replace;
|
|
char *endptr, *name;
|
|
int fd;
|
|
|
|
NEXT_ARG();
|
|
|
|
if (!REQ_ARGS(4))
|
|
goto err_free_reuse_maps;
|
|
|
|
if (is_prefix(*argv, "idx")) {
|
|
NEXT_ARG();
|
|
|
|
idx = strtoul(*argv, &endptr, 0);
|
|
if (*endptr) {
|
|
p_err("can't parse %s as IDX", *argv);
|
|
goto err_free_reuse_maps;
|
|
}
|
|
name = NULL;
|
|
} else if (is_prefix(*argv, "name")) {
|
|
NEXT_ARG();
|
|
|
|
name = *argv;
|
|
idx = -1;
|
|
} else {
|
|
p_err("expected 'idx' or 'name', got: '%s'?",
|
|
*argv);
|
|
goto err_free_reuse_maps;
|
|
}
|
|
NEXT_ARG();
|
|
|
|
fd = map_parse_fd(&argc, &argv);
|
|
if (fd < 0)
|
|
goto err_free_reuse_maps;
|
|
|
|
new_map_replace = reallocarray(map_replace,
|
|
old_map_fds + 1,
|
|
sizeof(*map_replace));
|
|
if (!new_map_replace) {
|
|
p_err("mem alloc failed");
|
|
goto err_free_reuse_maps;
|
|
}
|
|
map_replace = new_map_replace;
|
|
|
|
map_replace[old_map_fds].idx = idx;
|
|
map_replace[old_map_fds].name = name;
|
|
map_replace[old_map_fds].fd = fd;
|
|
old_map_fds++;
|
|
} else if (is_prefix(*argv, "dev")) {
|
|
NEXT_ARG();
|
|
|
|
if (ifindex) {
|
|
p_err("offload device already specified");
|
|
goto err_free_reuse_maps;
|
|
}
|
|
if (!REQ_ARGS(1))
|
|
goto err_free_reuse_maps;
|
|
|
|
ifindex = if_nametoindex(*argv);
|
|
if (!ifindex) {
|
|
p_err("unrecognized netdevice '%s': %s",
|
|
*argv, strerror(errno));
|
|
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);
|
|
goto err_free_reuse_maps;
|
|
}
|
|
}
|
|
|
|
set_max_rlimit();
|
|
|
|
obj = __bpf_object__open_xattr(&open_attr, bpf_flags);
|
|
if (IS_ERR_OR_NULL(obj)) {
|
|
p_err("failed to open object file");
|
|
goto err_free_reuse_maps;
|
|
}
|
|
|
|
bpf_object__for_each_program(pos, obj) {
|
|
enum bpf_prog_type prog_type = open_attr.prog_type;
|
|
|
|
if (open_attr.prog_type == BPF_PROG_TYPE_UNSPEC) {
|
|
const char *sec_name = bpf_program__title(pos, false);
|
|
|
|
err = libbpf_prog_type_by_name(sec_name, &prog_type,
|
|
&expected_attach_type);
|
|
if (err < 0)
|
|
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);
|
|
}
|
|
|
|
qsort(map_replace, old_map_fds, sizeof(*map_replace),
|
|
map_replace_compar);
|
|
|
|
/* After the sort maps by name will be first on the list, because they
|
|
* have idx == -1. Resolve them.
|
|
*/
|
|
j = 0;
|
|
while (j < old_map_fds && map_replace[j].name) {
|
|
i = 0;
|
|
bpf_object__for_each_map(map, obj) {
|
|
if (!strcmp(bpf_map__name(map), map_replace[j].name)) {
|
|
map_replace[j].idx = i;
|
|
break;
|
|
}
|
|
i++;
|
|
}
|
|
if (map_replace[j].idx == -1) {
|
|
p_err("unable to find map '%s'", map_replace[j].name);
|
|
goto err_close_obj;
|
|
}
|
|
j++;
|
|
}
|
|
/* Resort if any names were resolved */
|
|
if (j)
|
|
qsort(map_replace, old_map_fds, sizeof(*map_replace),
|
|
map_replace_compar);
|
|
|
|
/* Set ifindex and name reuse */
|
|
j = 0;
|
|
idx = 0;
|
|
bpf_object__for_each_map(map, obj) {
|
|
if (!bpf_map__is_offload_neutral(map))
|
|
bpf_map__set_ifindex(map, ifindex);
|
|
|
|
if (j < old_map_fds && idx == map_replace[j].idx) {
|
|
err = bpf_map__reuse_fd(map, map_replace[j++].fd);
|
|
if (err) {
|
|
p_err("unable to set up map reuse: %d", err);
|
|
goto err_close_obj;
|
|
}
|
|
|
|
/* Next reuse wants to apply to the same map */
|
|
if (j < old_map_fds && map_replace[j].idx == idx) {
|
|
p_err("replacement for map idx %d specified more than once",
|
|
idx);
|
|
goto err_close_obj;
|
|
}
|
|
}
|
|
|
|
idx++;
|
|
}
|
|
if (j < old_map_fds) {
|
|
p_err("map idx '%d' not used", map_replace[j].idx);
|
|
goto err_close_obj;
|
|
}
|
|
|
|
load_attr.obj = obj;
|
|
if (verifier_logs)
|
|
/* log_level1 + log_level2 + stats, but not stable UAPI */
|
|
load_attr.log_level = 1 + 2 + 4;
|
|
|
|
err = bpf_object__load_xattr(&load_attr);
|
|
if (err) {
|
|
p_err("failed to load object file");
|
|
goto err_close_obj;
|
|
}
|
|
|
|
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);
|
|
|
|
bpf_object__close(obj);
|
|
for (i = 0; i < old_map_fds; i++)
|
|
close(map_replace[i].fd);
|
|
free(map_replace);
|
|
|
|
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:
|
|
for (i = 0; i < old_map_fds; i++)
|
|
close(map_replace[i].fd);
|
|
free(map_replace);
|
|
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) {
|
|
jsonw_null(json_wtr);
|
|
return 0;
|
|
}
|
|
|
|
fprintf(stderr,
|
|
"Usage: %s %s { show | list } [PROG]\n"
|
|
" %s %s dump xlated PROG [{ file FILE | opcodes | visual | linum }]\n"
|
|
" %s %s dump jited PROG [{ file FILE | opcodes | linum }]\n"
|
|
" %s %s pin PROG FILE\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 run PROG \\\n"
|
|
" data_in FILE \\\n"
|
|
" [data_out FILE [data_size_out L]] \\\n"
|
|
" [ctx_in FILE [ctx_out FILE [ctx_size_out M]]] \\\n"
|
|
" [repeat N]\n"
|
|
" %s %s tracelog\n"
|
|
" %s %s help\n"
|
|
"\n"
|
|
" " HELP_SPEC_MAP "\n"
|
|
" " HELP_SPEC_PROGRAM "\n"
|
|
" TYPE := { socket | kprobe | kretprobe | classifier | action |\n"
|
|
" tracepoint | raw_tracepoint | xdp | perf_event | cgroup/skb |\n"
|
|
" cgroup/sock | cgroup/dev | lwt_in | lwt_out | lwt_xmit |\n"
|
|
" lwt_seg6local | sockops | sk_skb | sk_msg | lirc_mode2 |\n"
|
|
" sk_reuseport | flow_dissector | cgroup/sysctl |\n"
|
|
" cgroup/bind4 | cgroup/bind6 | cgroup/post_bind4 |\n"
|
|
" cgroup/post_bind6 | cgroup/connect4 | cgroup/connect6 |\n"
|
|
" cgroup/sendmsg4 | cgroup/sendmsg6 | cgroup/recvmsg4 |\n"
|
|
" cgroup/recvmsg6 | cgroup/getsockopt |\n"
|
|
" cgroup/setsockopt }\n"
|
|
" ATTACH_TYPE := { msg_verdict | stream_verdict | stream_parser |\n"
|
|
" flow_dissector }\n"
|
|
" " HELP_SPEC_OPTIONS "\n"
|
|
"",
|
|
bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
|
|
bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
|
|
bin_name, argv[-2], bin_name, argv[-2], bin_name, argv[-2],
|
|
bin_name, argv[-2]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct cmd cmds[] = {
|
|
{ "show", do_show },
|
|
{ "list", do_show },
|
|
{ "help", do_help },
|
|
{ "dump", do_dump },
|
|
{ "pin", do_pin },
|
|
{ "load", do_load },
|
|
{ "loadall", do_loadall },
|
|
{ "attach", do_attach },
|
|
{ "detach", do_detach },
|
|
{ "tracelog", do_tracelog },
|
|
{ "run", do_run },
|
|
{ 0 }
|
|
};
|
|
|
|
int do_prog(int argc, char **argv)
|
|
{
|
|
return cmd_select(cmds, argc, argv, do_help);
|
|
}
|