374e74de96
Add test to use get_netns_cookie() from BPF_PROG_TYPE_SOCK_OPS. Signed-off-by: Xu Liu <liuxu623@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Song Liu <songliubraving@fb.com> Link: https://lore.kernel.org/bpf/20210818105820.91894-3-liuxu623@gmail.com
40 lines
677 B
C
40 lines
677 B
C
// SPDX-License-Identifier: GPL-2.0
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#include "vmlinux.h"
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#include <bpf/bpf_helpers.h>
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#define AF_INET6 10
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struct {
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__uint(type, BPF_MAP_TYPE_SK_STORAGE);
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__uint(map_flags, BPF_F_NO_PREALLOC);
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__type(key, int);
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__type(value, int);
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} netns_cookies SEC(".maps");
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SEC("sockops")
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int get_netns_cookie_sockops(struct bpf_sock_ops *ctx)
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{
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struct bpf_sock *sk = ctx->sk;
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int *cookie;
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if (ctx->family != AF_INET6)
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return 1;
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if (ctx->op != BPF_SOCK_OPS_TCP_CONNECT_CB)
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return 1;
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if (!sk)
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return 1;
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cookie = bpf_sk_storage_get(&netns_cookies, sk, 0,
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BPF_SK_STORAGE_GET_F_CREATE);
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if (!cookie)
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return 1;
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*cookie = bpf_get_netns_cookie(ctx);
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return 1;
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}
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