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// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2020 Facebook */
#define bpf_iter_meta bpf_iter_meta___not_used
#define bpf_iter__bpf_map bpf_iter__bpf_map___not_used
#include "vmlinux.h"
#undef bpf_iter_meta
#undef bpf_iter__bpf_map
#include <bpf/bpf_helpers.h>
char _license[] SEC("license") = "GPL";
struct bpf_iter_meta {
struct seq_file *seq;
__u64 session_id;
__u64 seq_num;
} __attribute__((preserve_access_index));
struct bpf_iter__bpf_map {
struct bpf_iter_meta *meta;
struct bpf_map *map;
} __attribute__((preserve_access_index));
__u32 map1_id = 0, map2_id = 0;
__u32 map1_accessed = 0, map2_accessed = 0;
__u64 map1_seqnum = 0, map2_seqnum1 = 0, map2_seqnum2 = 0;
static volatile const __u32 print_len;
static volatile const __u32 ret1;
SEC("iter/bpf_map")
int dump_bpf_map(struct bpf_iter__bpf_map *ctx)
{
struct seq_file *seq = ctx->meta->seq;
struct bpf_map *map = ctx->map;
__u64 seq_num;
int i, ret = 0;
if (map == (void *)0)
return 0;
/* only dump map1_id and map2_id */
if (map->id != map1_id && map->id != map2_id)
return 0;
seq_num = ctx->meta->seq_num;
if (map->id == map1_id) {
map1_seqnum = seq_num;
map1_accessed++;
}
if (map->id == map2_id) {
if (map2_accessed == 0) {
map2_seqnum1 = seq_num;
if (ret1)
ret = 1;
} else {
map2_seqnum2 = seq_num;
}
map2_accessed++;
}
/* fill seq_file buffer */
for (i = 0; i < print_len; i++)
bpf_seq_write(seq, &seq_num, sizeof(seq_num));
return ret;
}
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