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prog.c
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// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2017-2018 Netronome Systems, Inc. */
#ifndef _GNU_SOURCE
#define _GNU_SOURCE
#endif
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <dirent.h>
#include <linux/err.h>
#include <linux/perf_event.h>
#include <linux/sizes.h>
#include <bpf/bpf.h>
#include <bpf/btf.h>
#include <bpf/hashmap.h>
#include <bpf/libbpf.h>
#include <bpf/libbpf_internal.h>
#include <bpf/skel_internal.h>
#include "cfg.h"
#include "main.h"
#include "xlated_dumper.h"
#define BPF_METADATA_PREFIX "bpf_metadata_"
#define BPF_METADATA_PREFIX_LEN (sizeof(BPF_METADATA_PREFIX) - 1)
enum dump_mode {
DUMP_JITED,
DUMP_XLATED,
};
static const bool attach_types[] = {
[BPF_SK_SKB_STREAM_PARSER] = true,
[BPF_SK_SKB_STREAM_VERDICT] = true,
[BPF_SK_SKB_VERDICT] = true,
[BPF_SK_MSG_VERDICT] = true,
[BPF_FLOW_DISSECTOR] = true,
[__MAX_BPF_ATTACH_TYPE] = false,
};
/* Textual representations traditionally used by the program and kept around
* for the sake of backwards compatibility.
*/
static const char * const attach_type_strings[] = {
[BPF_SK_SKB_STREAM_PARSER] = "stream_parser",
[BPF_SK_SKB_STREAM_VERDICT] = "stream_verdict",
[BPF_SK_SKB_VERDICT] = "skb_verdict",
[BPF_SK_MSG_VERDICT] = "msg_verdict",
[__MAX_BPF_ATTACH_TYPE] = NULL,
};
static struct hashmap *prog_table;
static enum bpf_attach_type parse_attach_type(const char *str)
{
enum bpf_attach_type type;
for (type = 0; type < __MAX_BPF_ATTACH_TYPE; type++) {
if (attach_types[type]) {
const char *attach_type_str;
attach_type_str = libbpf_bpf_attach_type_str(type);
if (!strcmp(str, attach_type_str))
return type;
}
if (attach_type_strings[type] &&
is_prefix(str, attach_type_strings[type]))
return type;
}
return __MAX_BPF_ATTACH_TYPE;
}
static int prep_prog_info(struct bpf_prog_info *const info, enum dump_mode mode,
void **info_data, size_t *const info_data_sz)
{
struct bpf_prog_info holder = {};
size_t needed = 0;
void *ptr;
if (mode == DUMP_JITED) {
holder.jited_prog_len = info->jited_prog_len;
needed += info->jited_prog_len;
} else {
holder.xlated_prog_len = info->xlated_prog_len;
needed += info->xlated_prog_len;
}
holder.nr_jited_ksyms = info->nr_jited_ksyms;
needed += info->nr_jited_ksyms * sizeof(__u64);
holder.nr_jited_func_lens = info->nr_jited_func_lens;
needed += info->nr_jited_func_lens * sizeof(__u32);
holder.nr_func_info = info->nr_func_info;
holder.func_info_rec_size = info->func_info_rec_size;
needed += info->nr_func_info * info->func_info_rec_size;
holder.nr_line_info = info->nr_line_info;
holder.line_info_rec_size = info->line_info_rec_size;
needed += info->nr_line_info * info->line_info_rec_size;
holder.nr_jited_line_info = info->nr_jited_line_info;
holder.jited_line_info_rec_size = info->jited_line_info_rec_size;
needed += info->nr_jited_line_info * info->jited_line_info_rec_size;
if (needed > *info_data_sz) {
ptr = realloc(*info_data, needed);
if (!ptr)
return -1;
*info_data = ptr;
*info_data_sz = needed;
}
ptr = *info_data;
if (mode == DUMP_JITED) {
holder.jited_prog_insns = ptr_to_u64(ptr);
ptr += holder.jited_prog_len;
} else {
holder.xlated_prog_insns = ptr_to_u64(ptr);
ptr += holder.xlated_prog_len;
}
holder.jited_ksyms = ptr_to_u64(ptr);
ptr += holder.nr_jited_ksyms * sizeof(__u64);
holder.jited_func_lens = ptr_to_u64(ptr);
ptr += holder.nr_jited_func_lens * sizeof(__u32);
holder.func_info = ptr_to_u64(ptr);
ptr += holder.nr_func_info * holder.func_info_rec_size;
holder.line_info = ptr_to_u64(ptr);
ptr += holder.nr_line_info * holder.line_info_rec_size;
holder.jited_line_info = ptr_to_u64(ptr);
ptr += holder.nr_jited_line_info * holder.jited_line_info_rec_size;
*info = holder;
return 0;
}
static void print_boot_time(__u64 nsecs, char *buf, unsigned int size)
{
struct timespec real_time_ts, boot_time_ts;
time_t wallclock_secs;
struct tm load_tm;
buf[--size] = '\0';
if (clock_gettime(CLOCK_REALTIME, &real_time_ts) ||
clock_gettime(CLOCK_BOOTTIME, &boot_time_ts)) {
perror("Can't read clocks");
snprintf(buf, size, "%llu", nsecs / 1000000000);
return;
}
wallclock_secs = (real_time_ts.tv_sec - boot_time_ts.tv_sec) +
(real_time_ts.tv_nsec - boot_time_ts.tv_nsec + nsecs) /
1000000000;
if (!localtime_r(&wallclock_secs, &load_tm)) {
snprintf(buf, size, "%llu", nsecs / 1000000000);
return;
}
if (json_output)
strftime(buf, size, "%s", &load_tm);
else
strftime(buf, size, "%FT%T%z", &load_tm);
}
static void show_prog_maps(int fd, __u32 num_maps)
{
struct bpf_prog_info info = {};
__u32 len = sizeof(info);
__u32 map_ids[num_maps];
unsigned int i;
int err;
info.nr_map_ids = num_maps;
info.map_ids = ptr_to_u64(map_ids);
err = bpf_prog_get_info_by_fd(fd, &info, &len);
if (err || !info.nr_map_ids)
return;
if (json_output) {
jsonw_name(json_wtr, "map_ids");
jsonw_start_array(json_wtr);
for (i = 0; i < info.nr_map_ids; i++)
jsonw_uint(json_wtr, map_ids[i]);
jsonw_end_array(json_wtr);
} else {
printf(" map_ids ");
for (i = 0; i < info.nr_map_ids; i++)
printf("%u%s", map_ids[i],
i == info.nr_map_ids - 1 ? "" : ",");
}
}
static void *find_metadata(int prog_fd, struct bpf_map_info *map_info)
{
struct bpf_prog_info prog_info;
__u32 prog_info_len;
__u32 map_info_len;
void *value = NULL;
__u32 *map_ids;
int nr_maps;
int key = 0;
int map_fd;
int ret;
__u32 i;
memset(&prog_info, 0, sizeof(prog_info));
prog_info_len = sizeof(prog_info);
ret = bpf_prog_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
if (ret)
return NULL;
if (!prog_info.nr_map_ids)
return NULL;
map_ids = calloc(prog_info.nr_map_ids, sizeof(__u32));
if (!map_ids)
return NULL;
nr_maps = prog_info.nr_map_ids;
memset(&prog_info, 0, sizeof(prog_info));
prog_info.nr_map_ids = nr_maps;
prog_info.map_ids = ptr_to_u64(map_ids);
prog_info_len = sizeof(prog_info);
ret = bpf_prog_get_info_by_fd(prog_fd, &prog_info, &prog_info_len);
if (ret)
goto free_map_ids;
for (i = 0; i < prog_info.nr_map_ids; i++) {
map_fd = bpf_map_get_fd_by_id(map_ids[i]);
if (map_fd < 0)
goto free_map_ids;
memset(map_info, 0, sizeof(*map_info));
map_info_len = sizeof(*map_info);
ret = bpf_map_get_info_by_fd(map_fd, map_info, &map_info_len);
if (ret < 0) {
close(map_fd);
goto free_map_ids;
}
if (map_info->type != BPF_MAP_TYPE_ARRAY ||
map_info->key_size != sizeof(int) ||
map_info->max_entries != 1 ||
!map_info->btf_value_type_id ||
!strstr(map_info->name, ".rodata")) {
close(map_fd);
continue;
}
value = malloc(map_info->value_size);
if (!value) {
close(map_fd);
goto free_map_ids;
}
if (bpf_map_lookup_elem(map_fd, &key, value)) {
close(map_fd);
free(value);
value = NULL;
goto free_map_ids;
}
close(map_fd);
break;
}
free_map_ids:
free(map_ids);
return value;
}
static bool has_metadata_prefix(const char *s)
{
return strncmp(s, BPF_METADATA_PREFIX, BPF_METADATA_PREFIX_LEN) == 0;
}
static void show_prog_metadata(int fd, __u32 num_maps)
{
const struct btf_type *t_datasec, *t_var;
struct bpf_map_info map_info;
struct btf_var_secinfo *vsi;
bool printed_header = false;
unsigned int i, vlen;
void *value = NULL;
const char *name;
struct btf *btf;
int err;
if (!num_maps)
return;
memset(&map_info, 0, sizeof(map_info));
value = find_metadata(fd, &map_info);
if (!value)
return;
btf = btf__load_from_kernel_by_id(map_info.btf_id);
if (!btf)
goto out_free;
t_datasec = btf__type_by_id(btf, map_info.btf_value_type_id);
if (!btf_is_datasec(t_datasec))
goto out_free;
vlen = btf_vlen(t_datasec);
vsi = btf_var_secinfos(t_datasec);
/* We don't proceed to check the kinds of the elements of the DATASEC.
* The verifier enforces them to be BTF_KIND_VAR.
*/
if (json_output) {
struct btf_dumper d = {
.btf = btf,
.jw = json_wtr,
.is_plain_text = false,
};
for (i = 0; i < vlen; i++, vsi++) {
t_var = btf__type_by_id(btf, vsi->type);
name = btf__name_by_offset(btf, t_var->name_off);
if (!has_metadata_prefix(name))
continue;
if (!printed_header) {
jsonw_name(json_wtr, "metadata");
jsonw_start_object(json_wtr);
printed_header = true;
}
jsonw_name(json_wtr, name + BPF_METADATA_PREFIX_LEN);
err = btf_dumper_type(&d, t_var->type, value + vsi->offset);
if (err) {
p_err("btf dump failed: %d", err);
break;
}
}
if (printed_header)
jsonw_end_object(json_wtr);
} else {
json_writer_t *btf_wtr;
struct btf_dumper d = {
.btf = btf,
.is_plain_text = true,
};
for (i = 0; i < vlen; i++, vsi++) {
t_var = btf__type_by_id(btf, vsi->type);
name = btf__name_by_offset(btf, t_var->name_off);
if (!has_metadata_prefix(name))
continue;
if (!printed_header) {
printf("\tmetadata:");
btf_wtr = jsonw_new(stdout);
if (!btf_wtr) {
p_err("jsonw alloc failed");
goto out_free;
}
d.jw = btf_wtr,
printed_header = true;
}
printf("\n\t\t%s = ", name + BPF_METADATA_PREFIX_LEN);
jsonw_reset(btf_wtr);
err = btf_dumper_type(&d, t_var->type, value + vsi->offset);
if (err) {
p_err("btf dump failed: %d", err);
break;
}
}
if (printed_header)
jsonw_destroy(&btf_wtr);
}
out_free:
btf__free(btf);
free(value);
}
static void print_prog_header_json(struct bpf_prog_info *info, int fd)
{
const char *prog_type_str;
char prog_name[MAX_PROG_FULL_NAME];
jsonw_uint_field(json_wtr, "id", info->id);
prog_type_str = libbpf_bpf_prog_type_str(info->type);
if (prog_type_str)
jsonw_string_field(json_wtr, "type", prog_type_str);
else
jsonw_uint_field(json_wtr, "type", info->type);
if (*info->name) {
get_prog_full_name(info, fd, prog_name, sizeof(prog_name));
jsonw_string_field(json_wtr, "name", prog_name);
}
jsonw_name(json_wtr, "tag");
jsonw_printf(json_wtr, "\"" BPF_TAG_FMT "\"",
info->tag[0], info->tag[1], info->tag[2], info->tag[3],
info->tag[4], info->tag[5], info->tag[6], info->tag[7]);
jsonw_bool_field(json_wtr, "gpl_compatible", info->gpl_compatible);
if (info->run_time_ns) {
jsonw_uint_field(json_wtr, "run_time_ns", info->run_time_ns);
jsonw_uint_field(json_wtr, "run_cnt", info->run_cnt);
}
if (info->recursion_misses)
jsonw_uint_field(json_wtr, "recursion_misses", info->recursion_misses);
}
static void print_prog_json(struct bpf_prog_info *info, int fd, bool orphaned)
{
char *memlock;
jsonw_start_object(json_wtr);
print_prog_header_json(info, fd);
print_dev_json(info->ifindex, info->netns_dev, info->netns_ino);
if (info->load_time) {
char buf[32];
print_boot_time(info->load_time, buf, sizeof(buf));
/* Piggy back on load_time, since 0 uid is a valid one */
jsonw_name(json_wtr, "loaded_at");
jsonw_printf(json_wtr, "%s", buf);
jsonw_uint_field(json_wtr, "uid", info->created_by_uid);
}
jsonw_bool_field(json_wtr, "orphaned", orphaned);
jsonw_uint_field(json_wtr, "bytes_xlated", info->xlated_prog_len);
if (info->jited_prog_len) {
jsonw_bool_field(json_wtr, "jited", true);
jsonw_uint_field(json_wtr, "bytes_jited", info->jited_prog_len);
} else {
jsonw_bool_field(json_wtr, "jited", false);
}
memlock = get_fdinfo(fd, "memlock");
if (memlock)
jsonw_int_field(json_wtr, "bytes_memlock", atoll(memlock));
free(memlock);
if (info->nr_map_ids)
show_prog_maps(fd, info->nr_map_ids);
if (info->btf_id)
jsonw_int_field(json_wtr, "btf_id", info->btf_id);
if (!hashmap__empty(prog_table)) {
struct hashmap_entry *entry;
jsonw_name(json_wtr, "pinned");
jsonw_start_array(json_wtr);
hashmap__for_each_key_entry(prog_table, entry, info->id)
jsonw_string(json_wtr, entry->pvalue);
jsonw_end_array(json_wtr);
}
emit_obj_refs_json(refs_table, info->id, json_wtr);
show_prog_metadata(fd, info->nr_map_ids);
jsonw_end_object(json_wtr);
}
static void print_prog_header_plain(struct bpf_prog_info *info, int fd)
{
const char *prog_type_str;
char prog_name[MAX_PROG_FULL_NAME];
printf("%u: ", info->id);
prog_type_str = libbpf_bpf_prog_type_str(info->type);
if (prog_type_str)
printf("%s ", prog_type_str);
else
printf("type %u ", info->type);
if (*info->name) {
get_prog_full_name(info, fd, prog_name, sizeof(prog_name));
printf("name %s ", prog_name);
}
printf("tag ");
fprint_hex(stdout, info->tag, BPF_TAG_SIZE, "");
print_dev_plain(info->ifindex, info->netns_dev, info->netns_ino);
printf("%s", info->gpl_compatible ? " gpl" : "");
if (info->run_time_ns)
printf(" run_time_ns %lld run_cnt %lld",
info->run_time_ns, info->run_cnt);
if (info->recursion_misses)
printf(" recursion_misses %lld", info->recursion_misses);
printf("\n");
}
static void print_prog_plain(struct bpf_prog_info *info, int fd, bool orphaned)
{
char *memlock;
print_prog_header_plain(info, fd);
if (info->load_time) {
char buf[32];
print_boot_time(info->load_time, buf, sizeof(buf));
/* Piggy back on load_time, since 0 uid is a valid one */
printf("\tloaded_at %s uid %u\n", buf, info->created_by_uid);
}
printf("\txlated %uB", info->xlated_prog_len);
if (info->jited_prog_len)
printf(" jited %uB", info->jited_prog_len);
else
printf(" not jited");
memlock = get_fdinfo(fd, "memlock");
if (memlock)
printf(" memlock %sB", memlock);
free(memlock);
if (orphaned)
printf(" orphaned");
if (info->nr_map_ids)
show_prog_maps(fd, info->nr_map_ids);
if (!hashmap__empty(prog_table)) {
struct hashmap_entry *entry;
hashmap__for_each_key_entry(prog_table, entry, info->id)
printf("\n\tpinned %s", (char *)entry->pvalue);
}
if (info->btf_id)
printf("\n\tbtf_id %d", info->btf_id);
emit_obj_refs_plain(refs_table, info->id, "\n\tpids ");
printf("\n");
show_prog_metadata(fd, info->nr_map_ids);
}
static int show_prog(int fd)
{
struct bpf_prog_info info = {};
__u32 len = sizeof(info);
int err;
err = bpf_prog_get_info_by_fd(fd, &info, &len);
if (err && err != -ENODEV) {
p_err("can't get prog info: %s", strerror(errno));
return -1;
}
if (json_output)
print_prog_json(&info, fd, err == -ENODEV);
else
print_prog_plain(&info, fd, err == -ENODEV);
return 0;
}
static int do_show_subset(int argc, char **argv)
{
int *fds = NULL;
int nb_fds, i;
int err = -1;
fds = malloc(sizeof(int));
if (!fds) {
p_err("mem alloc failed");
return -1;
}
nb_fds = prog_parse_fds(&argc, &argv, &fds);
if (nb_fds < 1)
goto exit_free;
if (json_output && nb_fds > 1)
jsonw_start_array(json_wtr); /* root array */
for (i = 0; i < nb_fds; i++) {
err = show_prog(fds[i]);
if (err) {
for (; i < nb_fds; i++)
close(fds[i]);
break;
}
close(fds[i]);
}
if (json_output && nb_fds > 1)
jsonw_end_array(json_wtr); /* root array */
exit_free:
free(fds);
return err;
}
static int do_show(int argc, char **argv)
{
__u32 id = 0;
int err;
int fd;
if (show_pinned) {
prog_table = hashmap__new(hash_fn_for_key_as_id,
equal_fn_for_key_as_id, NULL);
if (IS_ERR(prog_table)) {
p_err("failed to create hashmap for pinned paths");
return -1;
}
build_pinned_obj_table(prog_table, BPF_OBJ_PROG);
}
build_obj_refs_table(&refs_table, BPF_OBJ_PROG);
if (argc == 2)
return do_show_subset(argc, argv);
if (argc)
return BAD_ARG();
if (json_output)
jsonw_start_array(json_wtr);
while (true) {
err = bpf_prog_get_next_id(id, &id);
if (err) {
if (errno == ENOENT) {
err = 0;
break;
}
p_err("can't get next program: %s%s", strerror(errno),
errno == EINVAL ? " -- kernel too old?" : "");
err = -1;
break;
}
fd = bpf_prog_get_fd_by_id(id);
if (fd < 0) {
if (errno == ENOENT)
continue;
p_err("can't get prog by id (%u): %s",
id, strerror(errno));
err = -1;
break;
}
err = show_prog(fd);
close(fd);
if (err)
break;
}
if (json_output)
jsonw_end_array(json_wtr);
delete_obj_refs_table(refs_table);
if (show_pinned)
delete_pinned_obj_table(prog_table);
return err;
}
static int
prog_dump(struct bpf_prog_info *info, enum dump_mode mode,
char *filepath, bool opcodes, bool visual, bool linum)
{
struct bpf_prog_linfo *prog_linfo = NULL;
const char *disasm_opt = NULL;
struct dump_data dd = {};
void *func_info = NULL;
struct btf *btf = NULL;
char func_sig[1024];
unsigned char *buf;
__u32 member_len;
int fd, err = -1;
ssize_t n;
if (mode == DUMP_JITED) {
if (info->jited_prog_len == 0 || !info->jited_prog_insns) {
p_info("no instructions returned");
return -1;
}
buf = u64_to_ptr(info->jited_prog_insns);
member_len = info->jited_prog_len;
} else { /* DUMP_XLATED */
if (info->xlated_prog_len == 0 || !info->xlated_prog_insns) {
p_err("error retrieving insn dump: kernel.kptr_restrict set?");
return -1;
}
buf = u64_to_ptr(info->xlated_prog_insns);
member_len = info->xlated_prog_len;
}
if (info->btf_id) {
btf = btf__load_from_kernel_by_id(info->btf_id);
if (!btf) {
p_err("failed to get btf");
return -1;
}
}
func_info = u64_to_ptr(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 exit_free;
}
n = write(fd, buf, member_len);
close(fd);
if (n != (ssize_t)member_len) {
p_err("error writing output file: %s",
n < 0 ? strerror(errno) : "short write");
goto exit_free;
}
if (json_output)
jsonw_null(json_wtr);
} else if (mode == DUMP_JITED) {
const char *name = NULL;
if (info->ifindex) {
name = ifindex_to_arch(info->ifindex, info->netns_dev,
info->netns_ino, &disasm_opt);
if (!name)
goto exit_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_to_ptr(info->jited_ksyms);
}
if (json_output)
jsonw_start_array(json_wtr);
lens = u64_to_ptr(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);
}
if (ksyms) {
if (disasm_print_insn(img, lens[i], opcodes,
name, disasm_opt, btf,
prog_linfo, ksyms[i], i,
linum))
goto exit_free;
} else {
if (disasm_print_insn(img, lens[i], opcodes,
name, disasm_opt, btf,
NULL, 0, 0, false))
goto exit_free;
}
img += lens[i];
if (json_output)
jsonw_end_object(json_wtr);
else
printf("\n");
}
if (json_output)
jsonw_end_array(json_wtr);
} else {
if (disasm_print_insn(buf, member_len, opcodes, name,
disasm_opt, btf, NULL, 0, 0,
false))
goto exit_free;
}
} else {
kernel_syms_load(&dd);
dd.nr_jited_ksyms = info->nr_jited_ksyms;
dd.jited_ksyms = u64_to_ptr(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 if (visual)
dump_xlated_cfg(&dd, buf, member_len, opcodes, linum);
else
dump_xlated_plain(&dd, buf, member_len, opcodes, linum);
kernel_syms_destroy(&dd);
}
err = 0;
exit_free:
btf__free(btf);
bpf_prog_linfo__free(prog_linfo);
return err;
}
static int do_dump(int argc, char **argv)
{
struct bpf_prog_info info;
__u32 info_len = sizeof(info);
size_t info_data_sz = 0;
void *info_data = NULL;
char *filepath = NULL;
bool opcodes = false;
bool visual = false;
enum dump_mode mode;
bool linum = false;
int nb_fds, i = 0;
int *fds = NULL;
int err = -1;
if (is_prefix(*argv, "jited")) {
if (disasm_init())
return -1;
mode = DUMP_JITED;
} else if (is_prefix(*argv, "xlated")) {
mode = DUMP_XLATED;
} else {
p_err("expected 'xlated' or 'jited', got: %s", *argv);
return -1;
}
NEXT_ARG();
if (argc < 2)
usage();
fds = malloc(sizeof(int));
if (!fds) {
p_err("mem alloc failed");
return -1;
}
nb_fds = prog_parse_fds(&argc, &argv, &fds);
if (nb_fds < 1)
goto exit_free;
while (argc) {
if (is_prefix(*argv, "file")) {
NEXT_ARG();
if (!argc) {
p_err("expected file path");
goto exit_close;
}
if (nb_fds > 1) {
p_err("several programs matched");
goto exit_close;
}
filepath = *argv;
NEXT_ARG();
} else if (is_prefix(*argv, "opcodes")) {
opcodes = true;
NEXT_ARG();
} else if (is_prefix(*argv, "visual")) {
if (nb_fds > 1) {
p_err("several programs matched");
goto exit_close;
}
visual = true;
NEXT_ARG();
} else if (is_prefix(*argv, "linum")) {
linum = true;
NEXT_ARG();
} else {
usage();
goto exit_close;
}
}
if (filepath && (opcodes || visual || linum)) {
p_err("'file' is not compatible with 'opcodes', 'visual', or 'linum'");
goto exit_close;
}
if (json_output && visual) {
p_err("'visual' is not compatible with JSON output");
goto exit_close;
}
if (json_output && nb_fds > 1)
jsonw_start_array(json_wtr); /* root array */
for (i = 0; i < nb_fds; i++) {
memset(&info, 0, sizeof(info));
err = bpf_prog_get_info_by_fd(fds[i], &info, &info_len);
if (err) {
p_err("can't get prog info: %s", strerror(errno));
break;
}
err = prep_prog_info(&info, mode, &info_data, &info_data_sz);
if (err) {
p_err("can't grow prog info_data");
break;
}
err = bpf_prog_get_info_by_fd(fds[i], &info, &info_len);
if (err) {
p_err("can't get prog info: %s", strerror(errno));
break;
}
if (json_output && nb_fds > 1) {
jsonw_start_object(json_wtr); /* prog object */
print_prog_header_json(&info, fds[i]);
jsonw_name(json_wtr, "insns");
} else if (nb_fds > 1) {
print_prog_header_plain(&info, fds[i]);
}
err = prog_dump(&info, mode, filepath, opcodes, visual, linum);
if (json_output && nb_fds > 1)
jsonw_end_object(json_wtr); /* prog object */
else if (i != nb_fds - 1 && nb_fds > 1)
printf("\n");
if (err)