bpf: allow access into map value arrays

[karo-tx-linux.git] / include / linux / bpf.h

diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index 5691fdc8381905557dfb8f091bb93c81679f136e..c201017b573079961e4ca156ca7ebccda225b0ca 100644 (file)
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -139,6 +139,13 @@ enum bpf_reg_type {
         */
        PTR_TO_PACKET,
        PTR_TO_PACKET_END,       /* skb->data + headlen */
+
+       /* PTR_TO_MAP_VALUE_ADJ is used for doing pointer math inside of a map
+        * elem value.  We only allow this if we can statically verify that
+        * access from this register are going to fall within the size of the
+        * map element.
+        */
+       PTR_TO_MAP_VALUE_ADJ,
 };
 
 struct bpf_prog;