Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
#include <bpf/bpf_core_read.h>
 
#pragma clang attribute push (__attribute__((preserve_access_index)), apply_to = record)
struct seq_file;
struct bpf_iter_meta {
<------>struct seq_file *seq;
<------>__u64 session_id;
<------>__u64 seq_num;
};
 
struct bpf_map {
<------>__u32 id;
<------>char name[16];
<------>__u32 max_entries;
};
 
struct bpf_iter__bpf_map {
<------>struct bpf_iter_meta *meta;
<------>struct bpf_map *map;
};
 
struct btf_type {
<------>__u32 name_off;
};
 
struct btf_header {
<------>__u32   str_len;
};
 
struct btf {
<------>const char *strings;
<------>struct btf_type **types;
<------>struct btf_header hdr;
};
 
struct bpf_prog_aux {
<------>__u32 id;
<------>char name[16];
<------>const char *attach_func_name;
<------>struct bpf_prog *dst_prog;
<------>struct bpf_func_info *func_info;
<------>struct btf *btf;
};
 
struct bpf_prog {
<------>struct bpf_prog_aux *aux;
};
 
struct bpf_iter__bpf_prog {
<------>struct bpf_iter_meta *meta;
<------>struct bpf_prog *prog;
};
#pragma clang attribute pop
 
static const char *get_name(struct btf *btf, long btf_id, const char *fallback)
{
<------>struct btf_type **types, *t;
<------>unsigned int name_off;
<------>const char *str;
 
<------>if (!btf)
<------><------>return fallback;
<------>str = btf->strings;
<------>types = btf->types;
<------>bpf_probe_read_kernel(&t, sizeof(t), types + btf_id);
<------>name_off = BPF_CORE_READ(t, name_off);
<------>if (name_off >= btf->hdr.str_len)
<------><------>return fallback;
<------>return str + name_off;
}
 
SEC("iter/bpf_map")
int dump_bpf_map(struct bpf_iter__bpf_map *ctx)
{
<------>struct seq_file *seq = ctx->meta->seq;
<------>__u64 seq_num = ctx->meta->seq_num;
<------>struct bpf_map *map = ctx->map;
 
<------>if (!map)
<------><------>return 0;
 
<------>if (seq_num == 0)
<------><------>BPF_SEQ_PRINTF(seq, "  id name             max_entries\n");
 
<------>BPF_SEQ_PRINTF(seq, "%4u %-16s%6d\n", map->id, map->name, map->max_entries);
<------>return 0;
}
 
SEC("iter/bpf_prog")
int dump_bpf_prog(struct bpf_iter__bpf_prog *ctx)
{
<------>struct seq_file *seq = ctx->meta->seq;
<------>__u64 seq_num = ctx->meta->seq_num;
<------>struct bpf_prog *prog = ctx->prog;
<------>struct bpf_prog_aux *aux;
 
<------>if (!prog)
<------><------>return 0;
 
<------>aux = prog->aux;
<------>if (seq_num == 0)
<------><------>BPF_SEQ_PRINTF(seq, "  id name             attached\n");
 
<------>BPF_SEQ_PRINTF(seq, "%4u %-16s %s %s\n", aux->id,
<------><------>       get_name(aux->btf, aux->func_info[0].type_id, aux->name),
<------><------>       aux->attach_func_name, aux->dst_prog->aux->name);
<------>return 0;
}
char LICENSE[] SEC("license") = "GPL";