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f80ddbec47
Enable the already existing metadata copy test to also run in multi-buffer mode with 9K packets. Signed-off-by: Magnus Karlsson <magnus.karlsson@intel.com> Link: https://lore.kernel.org/r/20230719132421.584801-23-maciej.fijalkowski@intel.com Signed-off-by: Alexei Starovoitov <ast@kernel.org>
56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* Copyright (c) 2022 Intel */
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "xsk_xdp_metadata.h"
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struct {
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__uint(type, BPF_MAP_TYPE_XSKMAP);
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__uint(max_entries, 1);
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__uint(key_size, sizeof(int));
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__uint(value_size, sizeof(int));
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} xsk SEC(".maps");
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static unsigned int idx;
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int count = 0;
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SEC("xdp.frags") int xsk_def_prog(struct xdp_md *xdp)
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{
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return bpf_redirect_map(&xsk, 0, XDP_DROP);
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}
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SEC("xdp.frags") int xsk_xdp_drop(struct xdp_md *xdp)
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{
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/* Drop every other packet */
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if (idx++ % 2)
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return XDP_DROP;
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return bpf_redirect_map(&xsk, 0, XDP_DROP);
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}
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SEC("xdp.frags") int xsk_xdp_populate_metadata(struct xdp_md *xdp)
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{
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void *data, *data_meta;
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struct xdp_info *meta;
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int err;
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/* Reserve enough for all custom metadata. */
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err = bpf_xdp_adjust_meta(xdp, -(int)sizeof(struct xdp_info));
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if (err)
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return XDP_DROP;
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data = (void *)(long)xdp->data;
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data_meta = (void *)(long)xdp->data_meta;
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if (data_meta + sizeof(struct xdp_info) > data)
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return XDP_DROP;
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meta = data_meta;
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meta->count = count++;
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return bpf_redirect_map(&xsk, 0, XDP_DROP);
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}
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char _license[] SEC("license") = "GPL";
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