1*4882a593Smuzhiyun // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun #include "util/bpf_map.h"
4*4882a593Smuzhiyun #include <bpf/bpf.h>
5*4882a593Smuzhiyun #include <bpf/libbpf.h>
6*4882a593Smuzhiyun #include <linux/err.h>
7*4882a593Smuzhiyun #include <linux/kernel.h>
8*4882a593Smuzhiyun #include <stdbool.h>
9*4882a593Smuzhiyun #include <stdlib.h>
10*4882a593Smuzhiyun #include <unistd.h>
11*4882a593Smuzhiyun
bpf_map_def__is_per_cpu(const struct bpf_map_def * def)12*4882a593Smuzhiyun static bool bpf_map_def__is_per_cpu(const struct bpf_map_def *def)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun return def->type == BPF_MAP_TYPE_PERCPU_HASH ||
15*4882a593Smuzhiyun def->type == BPF_MAP_TYPE_PERCPU_ARRAY ||
16*4882a593Smuzhiyun def->type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
17*4882a593Smuzhiyun def->type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE;
18*4882a593Smuzhiyun }
19*4882a593Smuzhiyun
bpf_map_def__alloc_value(const struct bpf_map_def * def)20*4882a593Smuzhiyun static void *bpf_map_def__alloc_value(const struct bpf_map_def *def)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun if (bpf_map_def__is_per_cpu(def))
23*4882a593Smuzhiyun return malloc(round_up(def->value_size, 8) * sysconf(_SC_NPROCESSORS_CONF));
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun return malloc(def->value_size);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
bpf_map__fprintf(struct bpf_map * map,FILE * fp)28*4882a593Smuzhiyun int bpf_map__fprintf(struct bpf_map *map, FILE *fp)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun const struct bpf_map_def *def = bpf_map__def(map);
31*4882a593Smuzhiyun void *prev_key = NULL, *key, *value;
32*4882a593Smuzhiyun int fd = bpf_map__fd(map), err;
33*4882a593Smuzhiyun int printed = 0;
34*4882a593Smuzhiyun
35*4882a593Smuzhiyun if (fd < 0)
36*4882a593Smuzhiyun return fd;
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun if (IS_ERR(def))
39*4882a593Smuzhiyun return PTR_ERR(def);
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun err = -ENOMEM;
42*4882a593Smuzhiyun key = malloc(def->key_size);
43*4882a593Smuzhiyun if (key == NULL)
44*4882a593Smuzhiyun goto out;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun value = bpf_map_def__alloc_value(def);
47*4882a593Smuzhiyun if (value == NULL)
48*4882a593Smuzhiyun goto out_free_key;
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun while ((err = bpf_map_get_next_key(fd, prev_key, key) == 0)) {
51*4882a593Smuzhiyun int intkey = *(int *)key;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun if (!bpf_map_lookup_elem(fd, key, value)) {
54*4882a593Smuzhiyun bool boolval = *(bool *)value;
55*4882a593Smuzhiyun if (boolval)
56*4882a593Smuzhiyun printed += fprintf(fp, "[%d] = %d,\n", intkey, boolval);
57*4882a593Smuzhiyun } else {
58*4882a593Smuzhiyun printed += fprintf(fp, "[%d] = ERROR,\n", intkey);
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun
61*4882a593Smuzhiyun prev_key = key;
62*4882a593Smuzhiyun }
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun if (err == ENOENT)
65*4882a593Smuzhiyun err = printed;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun free(value);
68*4882a593Smuzhiyun out_free_key:
69*4882a593Smuzhiyun free(key);
70*4882a593Smuzhiyun out:
71*4882a593Smuzhiyun return err;
72*4882a593Smuzhiyun }
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