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Diffstat (limited to 'include/linux/filter.h')
-rw-r--r--include/linux/filter.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/filter.h b/include/linux/filter.h
index ff65d22cf336..92c6e31fb008 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -24,6 +24,7 @@
#include <net/sch_generic.h>
+#include <asm/byteorder.h>
#include <uapi/linux/filter.h>
#include <uapi/linux/bpf.h>
@@ -747,6 +748,18 @@ bpf_ctx_narrow_access_ok(u32 off, u32 size, u32 size_default)
return size <= size_default && (size & (size - 1)) == 0;
}
+static inline u8
+bpf_ctx_narrow_load_shift(u32 off, u32 size, u32 size_default)
+{
+ u8 load_off = off & (size_default - 1);
+
+#ifdef __LITTLE_ENDIAN
+ return load_off * 8;
+#else
+ return (size_default - (load_off + size)) * 8;
+#endif
+}
+
#define bpf_ctx_wide_access_ok(off, size, type, field) \
(size == sizeof(__u64) && \
off >= offsetof(type, field) && \