1 files changed, 19 insertions, 3 deletions

diff --git a/include/net/netfilter/nf_tables.h b/include/net/netfilter/nf_tables.h
index 9eaaa7884586..decb9a095ae7 100644
--- a/include/net/netfilter/nf_tables.h
+++ b/include/net/netfilter/nf_tables.h
@@ -119,6 +119,22 @@ int nft_validate_data_load(const struct nft_ctx *ctx, enum nft_registers reg,
                            const struct nft_data *data,
                            enum nft_data_types type);
 
+
+/**
+ *      struct nft_userdata - user defined data associated with an object
+ *
+ *      @len: length of the data
+ *      @data: content
+ *
+ *      The presence of user data is indicated in an object specific fashion,
+ *      so a length of zero can't occur and the value "len" indicates data
+ *      of length len + 1.
+ */
+struct nft_userdata {
+        u8                      len;
+        unsigned char           data[0];
+};
+
 /**
  *      struct nft_set_elem - generic representation of set elements
  *
@@ -380,7 +396,7 @@ static inline void *nft_expr_priv(const struct nft_expr *expr)
  *      @handle: rule handle
  *      @genmask: generation mask
  *      @dlen: length of expression data
- *      @ulen: length of user data (used for comments)
+ *      @udata: user data is appended to the rule
  *      @data: expression data
  */
 struct nft_rule {
@@ -388,7 +404,7 @@ struct nft_rule {
         u64                             handle:42,
                                         genmask:2,
                                         dlen:12,
-                                        ulen:8;
+                                        udata:1;
         unsigned char                   data[]
                 __attribute__((aligned(__alignof__(struct nft_expr))));
 };
@@ -476,7 +492,7 @@ static inline struct nft_expr *nft_expr_last(const struct nft_rule *rule)
         return (struct nft_expr *)&rule->data[rule->dlen];
 }
 
-static inline void *nft_userdata(const struct nft_rule *rule)
+static inline struct nft_userdata *nft_userdata(const struct nft_rule *rule)
 {
         return (void *)&rule->data[rule->dlen];
 }