1 files changed, 13 insertions, 2 deletions

diff --git a/include/linux/filter.h b/include/linux/filter.h
index e65e23087367..93a9792e27bc 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -19,14 +19,19 @@ struct compat_sock_fprog {
 };
 #endif
 
+struct sock_fprog_kern {
+        u16                     len;
+        struct sock_filter      *filter;
+};
+
 struct sk_buff;
 struct sock;
 
-struct sk_filter
-{
+struct sk_filter {
         atomic_t                refcnt;
         u32                     jited:1,        /* Is our filter JIT'ed? */
                                 len:31;         /* Number of filter blocks */
+        struct sock_fprog_kern  *orig_prog;     /* Original BPF program */
         struct rcu_head         rcu;
         unsigned int            (*bpf_func)(const struct sk_buff *skb,
                                             const struct sock_filter *filter);
@@ -42,14 +47,20 @@ static inline unsigned int sk_filter_size(unsigned int proglen)
                    offsetof(struct sk_filter, insns[proglen]));
 }
 
+#define sk_filter_proglen(fprog)                        \
+                (fprog->len * sizeof(fprog->filter[0]))
+
 extern int sk_filter(struct sock *sk, struct sk_buff *skb);
 extern unsigned int sk_run_filter(const struct sk_buff *skb,
                                   const struct sock_filter *filter);
+
 extern int sk_unattached_filter_create(struct sk_filter **pfp,
                                        struct sock_fprog *fprog);
 extern void sk_unattached_filter_destroy(struct sk_filter *fp);
+
 extern int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk);
 extern int sk_detach_filter(struct sock *sk);
+
 extern int sk_chk_filter(struct sock_filter *filter, unsigned int flen);
 extern int sk_get_filter(struct sock *sk, struct sock_filter __user *filter, unsigned len);
 extern void sk_decode_filter(struct sock_filter *filt, struct sock_filter *to);