Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include "util/bpf_map.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include <bpf/bpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include <bpf/libbpf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <stdbool.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) static bool bpf_map_def__is_per_cpu(const struct bpf_map_def *def)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	return def->type == BPF_MAP_TYPE_PERCPU_HASH ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	       def->type == BPF_MAP_TYPE_PERCPU_ARRAY ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	       def->type == BPF_MAP_TYPE_LRU_PERCPU_HASH ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	       def->type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static void *bpf_map_def__alloc_value(const struct bpf_map_def *def)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	if (bpf_map_def__is_per_cpu(def))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 		return malloc(round_up(def->value_size, 8) * sysconf(_SC_NPROCESSORS_CONF));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	return malloc(def->value_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) int bpf_map__fprintf(struct bpf_map *map, FILE *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	const struct bpf_map_def *def = bpf_map__def(map);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 	void *prev_key = NULL, *key, *value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 	int fd = bpf_map__fd(map), err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	int printed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	if (fd < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 		return fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	if (IS_ERR(def))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 		return PTR_ERR(def);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 	err = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	key = malloc(def->key_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (key == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	value = bpf_map_def__alloc_value(def);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	if (value == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 		goto out_free_key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 	while ((err = bpf_map_get_next_key(fd, prev_key, key) == 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		int intkey = *(int *)key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 		if (!bpf_map_lookup_elem(fd, key, value)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 			bool boolval = *(bool *)value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 			if (boolval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 				printed += fprintf(fp, "[%d] = %d,\n", intkey, boolval);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 			printed += fprintf(fp, "[%d] = ERROR,\n", intkey);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		prev_key = key;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	if (err == ENOENT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		err = printed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	free(value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) out_free_key:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	free(key);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }