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43b987d23d
test_maps: Tests that queue/stack maps are behaving correctly even in corner cases test_progs: Tests new ebpf helpers Signed-off-by: Mauricio Vasquez B <mauricio.vasquez@polito.it> Acked-by: Song Liu <songliubraving@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>
59 lines
1.2 KiB
C
59 lines
1.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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// Copyright (c) 2018 Politecnico di Torino
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#include <stddef.h>
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#include <string.h>
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#include <linux/bpf.h>
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#include <linux/if_ether.h>
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#include <linux/ip.h>
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#include <linux/pkt_cls.h>
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#include "bpf_helpers.h"
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int _version SEC("version") = 1;
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struct bpf_map_def __attribute__ ((section("maps"), used)) map_in = {
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.type = MAP_TYPE,
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.key_size = 0,
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.value_size = sizeof(__u32),
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.max_entries = 32,
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.map_flags = 0,
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};
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struct bpf_map_def __attribute__ ((section("maps"), used)) map_out = {
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.type = MAP_TYPE,
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.key_size = 0,
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.value_size = sizeof(__u32),
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.max_entries = 32,
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.map_flags = 0,
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};
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SEC("test")
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int _test(struct __sk_buff *skb)
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{
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void *data_end = (void *)(long)skb->data_end;
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void *data = (void *)(long)skb->data;
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struct ethhdr *eth = (struct ethhdr *)(data);
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__u32 value;
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int err;
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if (eth + 1 > data_end)
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return TC_ACT_SHOT;
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struct iphdr *iph = (struct iphdr *)(eth + 1);
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if (iph + 1 > data_end)
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return TC_ACT_SHOT;
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err = bpf_map_pop_elem(&map_in, &value);
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if (err)
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return TC_ACT_SHOT;
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iph->daddr = value;
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err = bpf_map_push_elem(&map_out, &iph->saddr, 0);
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if (err)
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return TC_ACT_SHOT;
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return TC_ACT_OK;
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}
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char _license[] SEC("license") = "GPL";
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