From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- samples/bpf/xdpsock_kern.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 samples/bpf/xdpsock_kern.c (limited to 'samples/bpf/xdpsock_kern.c') diff --git a/samples/bpf/xdpsock_kern.c b/samples/bpf/xdpsock_kern.c new file mode 100644 index 000000000..d8806c413 --- /dev/null +++ b/samples/bpf/xdpsock_kern.c @@ -0,0 +1,56 @@ +// SPDX-License-Identifier: GPL-2.0 +#define KBUILD_MODNAME "foo" +#include +#include "bpf_helpers.h" + +#include "xdpsock.h" + +struct bpf_map_def SEC("maps") qidconf_map = { + .type = BPF_MAP_TYPE_ARRAY, + .key_size = sizeof(int), + .value_size = sizeof(int), + .max_entries = 1, +}; + +struct bpf_map_def SEC("maps") xsks_map = { + .type = BPF_MAP_TYPE_XSKMAP, + .key_size = sizeof(int), + .value_size = sizeof(int), + .max_entries = 4, +}; + +struct bpf_map_def SEC("maps") rr_map = { + .type = BPF_MAP_TYPE_PERCPU_ARRAY, + .key_size = sizeof(int), + .value_size = sizeof(unsigned int), + .max_entries = 1, +}; + +SEC("xdp_sock") +int xdp_sock_prog(struct xdp_md *ctx) +{ + int *qidconf, key = 0, idx; + unsigned int *rr; + + qidconf = bpf_map_lookup_elem(&qidconf_map, &key); + if (!qidconf) + return XDP_ABORTED; + + if (*qidconf != ctx->rx_queue_index) + return XDP_PASS; + +#if RR_LB /* NB! RR_LB is configured in xdpsock.h */ + rr = bpf_map_lookup_elem(&rr_map, &key); + if (!rr) + return XDP_ABORTED; + + *rr = (*rr + 1) & (MAX_SOCKS - 1); + idx = *rr; +#else + idx = 0; +#endif + + return bpf_redirect_map(&xsks_map, idx, 0); +} + +char _license[] SEC("license") = "GPL"; -- cgit v1.2.3