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-rw-r--r--src/xdp/include/bpf_util.h61
1 files changed, 61 insertions, 0 deletions
diff --git a/src/xdp/include/bpf_util.h b/src/xdp/include/bpf_util.h
new file mode 100644
index 000000000..e74b33e9d
--- /dev/null
+++ b/src/xdp/include/bpf_util.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/* Copied from $(LINUX)/tools/testing/selftests/bpf/bpf_util.h */
+#ifndef __BPF_UTIL__
+#define __BPF_UTIL__
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+
+static inline unsigned int bpf_num_possible_cpus(void)
+{
+ static const char *fcpu = "/sys/devices/system/cpu/possible";
+ unsigned int start, end, possible_cpus = 0;
+ char buff[128];
+ FILE *fp;
+ int n;
+
+ fp = fopen(fcpu, "r");
+ if (!fp) {
+ printf("Failed to open %s: '%s'!\n", fcpu, strerror(errno));
+ exit(1);
+ }
+
+ while (fgets(buff, sizeof(buff), fp)) {
+ n = sscanf(buff, "%u-%u", &start, &end);
+ if (n == 0) {
+ printf("Failed to retrieve # possible CPUs!\n");
+ exit(1);
+ } else if (n == 1) {
+ end = start;
+ }
+ possible_cpus = start == 0 ? end + 1 : 0;
+ break;
+ }
+ fclose(fp);
+
+ return possible_cpus;
+}
+
+#define __bpf_percpu_val_align __attribute__((__aligned__(8)))
+
+#define BPF_DECLARE_PERCPU(type, name) \
+ struct { type v; /* padding */ } __bpf_percpu_val_align \
+ name[bpf_num_possible_cpus()]
+#define bpf_percpu(name, cpu) name[(cpu)].v
+
+#ifndef ARRAY_SIZE
+# define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+#endif
+
+#ifndef sizeof_field
+#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
+#endif
+
+#ifndef offsetofend
+#define offsetofend(TYPE, MEMBER) \
+ (offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER))
+#endif
+
+#endif /* __BPF_UTIL__ */