net: Remove unused skb_shared_info member

ip6_frag_id was only used by UFO, which has been removed.
ipv6_proxy_select_ident() only existed to set ip6_frag_id and has no
in-tree callers.

Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h
index 57d7126..54fe911 100644 (file)
--- a/include/linux/skbuff.h
+++ b/include/linux/skbuff.h
@@ -500,7 +500,6 @@ struct skb_shared_info {
        struct skb_shared_hwtstamps hwtstamps;
        unsigned int    gso_type;
        u32             tskey;
-       __be32          ip6_frag_id;
 
        /*
         * Warning : all fields before dataref are cleared in __alloc_skb()

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index fb6d670..ec14f0d 100644 (file)
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -767,7 +767,6 @@ static inline int ipv6_addr_diff(const struct in6_addr *a1, const struct in6_add
 __be32 ipv6_select_ident(struct net *net,
                         const struct in6_addr *daddr,
                         const struct in6_addr *saddr);
-void ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb);
 
 int ip6_dst_hoplimit(struct dst_entry *dst);
 

diff --git a/net/ipv6/output_core.c b/net/ipv6/output_core.c
index a338bbc..4a7e5ff 100644 (file)
--- a/net/ipv6/output_core.c
+++ b/net/ipv6/output_core.c
@@ -31,37 +31,6 @@ static u32 __ipv6_select_ident(struct net *net, u32 hashrnd,
        return id;
 }
 
-/* This function exists only for tap drivers that must support broken
- * clients requesting UFO without specifying an IPv6 fragment ID.
- *
- * This is similar to ipv6_select_ident() but we use an independent hash
- * seed to limit information leakage.
- *
- * The network header must be set before calling this.
- */
-void ipv6_proxy_select_ident(struct net *net, struct sk_buff *skb)
-{
-       static u32 ip6_proxy_idents_hashrnd __read_mostly;
-       struct in6_addr buf[2];
-       struct in6_addr *addrs;
-       u32 id;
-
-       addrs = skb_header_pointer(skb,
-                                  skb_network_offset(skb) +
-                                  offsetof(struct ipv6hdr, saddr),
-                                  sizeof(buf), buf);
-       if (!addrs)
-               return;
-
-       net_get_random_once(&ip6_proxy_idents_hashrnd,
-                           sizeof(ip6_proxy_idents_hashrnd));
-
-       id = __ipv6_select_ident(net, ip6_proxy_idents_hashrnd,
-                                &addrs[1], &addrs[0]);
-       skb_shinfo(skb)->ip6_frag_id = htonl(id);
-}
-EXPORT_SYMBOL_GPL(ipv6_proxy_select_ident);
-
 __be32 ipv6_select_ident(struct net *net,
                         const struct in6_addr *daddr,
                         const struct in6_addr *saddr)