forked from Minki/linux
selftests/net: Fix reuseport_bpf_numa by skipping unavailable nodes
In some platforms the numa node numbers are not necessarily consecutive, meaning that not all nodes from 0 to the value returned by numa_max_node() are available on the system. Using node numbers which are not available results on errors from libnuma such as: ---- IPv4 UDP ---- send node 0, receive socket 0 libnuma: Warning: Cannot read node cpumask from sysfs ./reuseport_bpf_numa: failed to pin to node: No such file or directory Fix it by checking if the node number bit is set on numa_nodes_ptr, which is defined on libnuma as "Set with all nodes the kernel has exposed to userspace". Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20211101145317.286118-1-kleber.souza@canonical.com
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@ -211,12 +211,16 @@ static void test(int *rcv_fd, int len, int family, int proto)
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/* Forward iterate */
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/* Forward iterate */
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for (node = 0; node < len; ++node) {
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for (node = 0; node < len; ++node) {
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if (!numa_bitmask_isbitset(numa_nodes_ptr, node))
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continue;
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send_from_node(node, family, proto);
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send_from_node(node, family, proto);
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receive_on_node(rcv_fd, len, epfd, node, proto);
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receive_on_node(rcv_fd, len, epfd, node, proto);
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}
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}
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/* Reverse iterate */
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/* Reverse iterate */
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for (node = len - 1; node >= 0; --node) {
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for (node = len - 1; node >= 0; --node) {
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if (!numa_bitmask_isbitset(numa_nodes_ptr, node))
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continue;
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send_from_node(node, family, proto);
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send_from_node(node, family, proto);
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receive_on_node(rcv_fd, len, epfd, node, proto);
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receive_on_node(rcv_fd, len, epfd, node, proto);
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}
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}
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