2f7de9865b
Add a test that exercises a basic sockmap / sockhash iteration. For now we simply count the number of elements seen. Once sockmap update from iterators works we can extend this to perform a full copy. Signed-off-by: Lorenz Bauer <lmb@cloudflare.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200909162712.221874-4-lmb@cloudflare.com
44 lines
818 B
C
44 lines
818 B
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2020 Cloudflare */
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#include "bpf_iter.h"
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#include "bpf_tracing_net.h"
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#include "bpf_iter_sockmap.h"
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#include <bpf/bpf_helpers.h>
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#include <bpf/bpf_tracing.h>
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#include <errno.h>
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char _license[] SEC("license") = "GPL";
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struct {
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__uint(type, BPF_MAP_TYPE_SOCKMAP);
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__uint(max_entries, SOCKMAP_MAX_ENTRIES);
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__type(key, __u32);
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__type(value, __u64);
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} sockmap SEC(".maps");
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struct {
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__uint(type, BPF_MAP_TYPE_SOCKHASH);
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__uint(max_entries, SOCKMAP_MAX_ENTRIES);
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__type(key, __u32);
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__type(value, __u64);
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} sockhash SEC(".maps");
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__u32 elems = 0;
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__u32 socks = 0;
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SEC("iter/sockmap")
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int count_elems(struct bpf_iter__sockmap *ctx)
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{
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struct sock *sk = ctx->sk;
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__u32 tmp, *key = ctx->key;
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int ret;
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if (key)
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elems++;
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if (sk)
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socks++;
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return 0;
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}
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