1d19f8564SArnaldo Carvalho de Melo // SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) 2d19f8564SArnaldo Carvalho de Melo 3d19f8564SArnaldo Carvalho de Melo #include "util/bpf_map.h" 4d19f8564SArnaldo Carvalho de Melo #include <bpf/bpf.h> 5d19f8564SArnaldo Carvalho de Melo #include <bpf/libbpf.h> 6d19f8564SArnaldo Carvalho de Melo #include <linux/err.h> 7d19f8564SArnaldo Carvalho de Melo #include <linux/kernel.h> 8d19f8564SArnaldo Carvalho de Melo #include <stdbool.h> 9d19f8564SArnaldo Carvalho de Melo #include <stdlib.h> 10d19f8564SArnaldo Carvalho de Melo #include <unistd.h> 11d19f8564SArnaldo Carvalho de Melo 12*924b1cd6SChristy Lee static bool bpf_map__is_per_cpu(enum bpf_map_type type) 13d19f8564SArnaldo Carvalho de Melo { 14*924b1cd6SChristy Lee return type == BPF_MAP_TYPE_PERCPU_HASH || 15*924b1cd6SChristy Lee type == BPF_MAP_TYPE_PERCPU_ARRAY || 16*924b1cd6SChristy Lee type == BPF_MAP_TYPE_LRU_PERCPU_HASH || 17*924b1cd6SChristy Lee type == BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE; 18d19f8564SArnaldo Carvalho de Melo } 19d19f8564SArnaldo Carvalho de Melo 20*924b1cd6SChristy Lee static void *bpf_map__alloc_value(const struct bpf_map *map) 21d19f8564SArnaldo Carvalho de Melo { 22*924b1cd6SChristy Lee if (bpf_map__is_per_cpu(bpf_map__type(map))) 23*924b1cd6SChristy Lee return malloc(round_up(bpf_map__value_size(map), 8) * 24*924b1cd6SChristy Lee sysconf(_SC_NPROCESSORS_CONF)); 25d19f8564SArnaldo Carvalho de Melo 26*924b1cd6SChristy Lee return malloc(bpf_map__value_size(map)); 27d19f8564SArnaldo Carvalho de Melo } 28d19f8564SArnaldo Carvalho de Melo 29d19f8564SArnaldo Carvalho de Melo int bpf_map__fprintf(struct bpf_map *map, FILE *fp) 30d19f8564SArnaldo Carvalho de Melo { 31d19f8564SArnaldo Carvalho de Melo void *prev_key = NULL, *key, *value; 32d19f8564SArnaldo Carvalho de Melo int fd = bpf_map__fd(map), err; 33d19f8564SArnaldo Carvalho de Melo int printed = 0; 34d19f8564SArnaldo Carvalho de Melo 35d19f8564SArnaldo Carvalho de Melo if (fd < 0) 36d19f8564SArnaldo Carvalho de Melo return fd; 37d19f8564SArnaldo Carvalho de Melo 38d19f8564SArnaldo Carvalho de Melo err = -ENOMEM; 39*924b1cd6SChristy Lee key = malloc(bpf_map__key_size(map)); 40d19f8564SArnaldo Carvalho de Melo if (key == NULL) 41d19f8564SArnaldo Carvalho de Melo goto out; 42d19f8564SArnaldo Carvalho de Melo 43*924b1cd6SChristy Lee value = bpf_map__alloc_value(map); 44d19f8564SArnaldo Carvalho de Melo if (value == NULL) 45d19f8564SArnaldo Carvalho de Melo goto out_free_key; 46d19f8564SArnaldo Carvalho de Melo 47d19f8564SArnaldo Carvalho de Melo while ((err = bpf_map_get_next_key(fd, prev_key, key) == 0)) { 48d19f8564SArnaldo Carvalho de Melo int intkey = *(int *)key; 49d19f8564SArnaldo Carvalho de Melo 50d19f8564SArnaldo Carvalho de Melo if (!bpf_map_lookup_elem(fd, key, value)) { 51d19f8564SArnaldo Carvalho de Melo bool boolval = *(bool *)value; 52d19f8564SArnaldo Carvalho de Melo if (boolval) 53d19f8564SArnaldo Carvalho de Melo printed += fprintf(fp, "[%d] = %d,\n", intkey, boolval); 54d19f8564SArnaldo Carvalho de Melo } else { 55d19f8564SArnaldo Carvalho de Melo printed += fprintf(fp, "[%d] = ERROR,\n", intkey); 56d19f8564SArnaldo Carvalho de Melo } 57d19f8564SArnaldo Carvalho de Melo 58d19f8564SArnaldo Carvalho de Melo prev_key = key; 59d19f8564SArnaldo Carvalho de Melo } 60d19f8564SArnaldo Carvalho de Melo 61d19f8564SArnaldo Carvalho de Melo if (err == ENOENT) 62d19f8564SArnaldo Carvalho de Melo err = printed; 63d19f8564SArnaldo Carvalho de Melo 64d19f8564SArnaldo Carvalho de Melo free(value); 65d19f8564SArnaldo Carvalho de Melo out_free_key: 66d19f8564SArnaldo Carvalho de Melo free(key); 67d19f8564SArnaldo Carvalho de Melo out: 68d19f8564SArnaldo Carvalho de Melo return err; 69d19f8564SArnaldo Carvalho de Melo } 70