[IPV6]: Replace sk_buff ** with sk_buff * in input handlers

With all the users of the double pointers removed from the IPv6 input path,
this patch converts all occurances of sk_buff ** to sk_buff * in IPv6 input
handlers.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

10 files changed, 30 insertions, 49 deletions

diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 0ff2bf12ecd1..1e89efd38a0c 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -102,7 +102,7 @@ EXPORT_SYMBOL_GPL(ipv6_find_tlv);
 
 struct tlvtype_proc {
         int     type;
-        int     (*func)(struct sk_buff **skbp, int offset);
+        int     (*func)(struct sk_buff *skb, int offset);
 };
 
 /*********************
@@ -111,10 +111,8 @@ struct tlvtype_proc {
 
 /* An unknown option is detected, decide what to do */
 
-static int ip6_tlvopt_unknown(struct sk_buff **skbp, int optoff)
+static int ip6_tlvopt_unknown(struct sk_buff *skb, int optoff)
 {
-        struct sk_buff *skb = *skbp;
-
         switch ((skb_network_header(skb)[optoff] & 0xC0) >> 6) {
         case 0: /* ignore */
                 return 1;
@@ -139,9 +137,8 @@ static int ip6_tlvopt_unknown(struct sk_buff **skbp, int optoff)
 
 /* Parse tlv encoded option header (hop-by-hop or destination) */
 
-static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
+static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff *skb)
 {
-        struct sk_buff *skb = *skbp;
         struct tlvtype_proc *curr;
         const unsigned char *nh = skb_network_header(skb);
         int off = skb_network_header_len(skb);
@@ -172,13 +169,13 @@ static int ip6_parse_tlv(struct tlvtype_proc *procs, struct sk_buff **skbp)
                                         /* type specific length/alignment
                                            checks will be performed in the
                                            func(). */
-                                        if (curr->func(skbp, off) == 0)
+                                        if (curr->func(skb, off) == 0)
                                                 return 0;
                                         break;
                                 }
                         }
                         if (curr->type < 0) {
-                                if (ip6_tlvopt_unknown(skbp, off) == 0)
+                                if (ip6_tlvopt_unknown(skb, off) == 0)
                                         return 0;
                         }
                         break;
@@ -198,9 +195,8 @@ bad:
  *****************************/
 
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
-static int ipv6_dest_hao(struct sk_buff **skbp, int optoff)
+static int ipv6_dest_hao(struct sk_buff *skb, int optoff)
 {
-        struct sk_buff *skb = *skbp;
         struct ipv6_destopt_hao *hao;
         struct inet6_skb_parm *opt = IP6CB(skb);
         struct ipv6hdr *ipv6h = ipv6_hdr(skb);
@@ -271,9 +267,8 @@ static struct tlvtype_proc tlvprocdestopt_lst[] = {
         {-1,                    NULL}
 };
 
-static int ipv6_destopt_rcv(struct sk_buff **skbp)
+static int ipv6_destopt_rcv(struct sk_buff *skb)
 {
-        struct sk_buff *skb = *skbp;
         struct inet6_skb_parm *opt = IP6CB(skb);
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
         __u16 dstbuf;
@@ -295,9 +290,8 @@ static int ipv6_destopt_rcv(struct sk_buff **skbp)
 #endif
 
         dst = dst_clone(skb->dst);
-        if (ip6_parse_tlv(tlvprocdestopt_lst, skbp)) {
+        if (ip6_parse_tlv(tlvprocdestopt_lst, skb)) {
                 dst_release(dst);
-                skb = *skbp;
                 skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
                 opt = IP6CB(skb);
 #if defined(CONFIG_IPV6_MIP6) || defined(CONFIG_IPV6_MIP6_MODULE)
@@ -328,10 +322,8 @@ void __init ipv6_destopt_init(void)
   NONE header. No data in packet.
  ********************************/
 
-static int ipv6_nodata_rcv(struct sk_buff **skbp)
+static int ipv6_nodata_rcv(struct sk_buff *skb)
 {
-        struct sk_buff *skb = *skbp;
-
         kfree_skb(skb);
         return 0;
 }
@@ -351,9 +343,8 @@ void __init ipv6_nodata_init(void)
   Routing header.
  ********************************/
 
-static int ipv6_rthdr_rcv(struct sk_buff **skbp)
+static int ipv6_rthdr_rcv(struct sk_buff *skb)
 {
-        struct sk_buff *skb = *skbp;
         struct inet6_skb_parm *opt = IP6CB(skb);
         struct in6_addr *addr = NULL;
         struct in6_addr daddr;
@@ -565,9 +556,8 @@ static inline struct inet6_dev *ipv6_skb_idev(struct sk_buff *skb)
 
 /* Router Alert as of RFC 2711 */
 
-static int ipv6_hop_ra(struct sk_buff **skbp, int optoff)
+static int ipv6_hop_ra(struct sk_buff *skb, int optoff)
 {
-        struct sk_buff *skb = *skbp;
         const unsigned char *nh = skb_network_header(skb);
 
         if (nh[optoff + 1] == 2) {
@@ -582,9 +572,8 @@ static int ipv6_hop_ra(struct sk_buff **skbp, int optoff)
 
 /* Jumbo payload */
 
-static int ipv6_hop_jumbo(struct sk_buff **skbp, int optoff)
+static int ipv6_hop_jumbo(struct sk_buff *skb, int optoff)
 {
-        struct sk_buff *skb = *skbp;
         const unsigned char *nh = skb_network_header(skb);
         u32 pkt_len;
 
@@ -635,9 +624,8 @@ static struct tlvtype_proc tlvprochopopt_lst[] = {
         { -1, }
 };
 
-int ipv6_parse_hopopts(struct sk_buff **skbp)
+int ipv6_parse_hopopts(struct sk_buff *skb)
 {
-        struct sk_buff *skb = *skbp;
         struct inet6_skb_parm *opt = IP6CB(skb);
 
         /*
@@ -654,8 +642,7 @@ int ipv6_parse_hopopts(struct sk_buff **skbp)
         }
 
         opt->hop = sizeof(struct ipv6hdr);
-        if (ip6_parse_tlv(tlvprochopopt_lst, skbp)) {
-                skb = *skbp;
+        if (ip6_parse_tlv(tlvprochopopt_lst, skb)) {
                 skb->transport_header += (skb_transport_header(skb)[1] + 1) << 3;
                 opt = IP6CB(skb);
                 opt->nhoff = sizeof(struct ipv6hdr);
diff --git a/net/ipv6/icmp.c b/net/ipv6/icmp.c
index 47b8ce232e84..9bb031fa1c2f 100644
--- a/net/ipv6/icmp.c
+++ b/net/ipv6/icmp.c
@@ -82,7 +82,7 @@ EXPORT_SYMBOL(icmpv6msg_statistics);
 static DEFINE_PER_CPU(struct socket *, __icmpv6_socket) = NULL;
 #define icmpv6_socket   __get_cpu_var(__icmpv6_socket)
 
-static int icmpv6_rcv(struct sk_buff **pskb);
+static int icmpv6_rcv(struct sk_buff *skb);
 
 static struct inet6_protocol icmpv6_protocol = {
         .handler        =       icmpv6_rcv,
@@ -614,9 +614,8 @@ static void icmpv6_notify(struct sk_buff *skb, int type, int code, __be32 info)
  *      Handle icmp messages
  */
 
-static int icmpv6_rcv(struct sk_buff **pskb)
+static int icmpv6_rcv(struct sk_buff *skb)
 {
-        struct sk_buff *skb = *pskb;
         struct net_device *dev = skb->dev;
         struct inet6_dev *idev = __in6_dev_get(dev);
         struct in6_addr *saddr, *daddr;
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index e7c85069a5db..fac6f7f9dd73 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -125,7 +125,7 @@ int ipv6_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt
         }
 
         if (hdr->nexthdr == NEXTHDR_HOP) {
-                if (ipv6_parse_hopopts(&skb) < 0) {
+                if (ipv6_parse_hopopts(skb) < 0) {
                         IP6_INC_STATS_BH(idev, IPSTATS_MIB_INHDRERRORS);
                         rcu_read_unlock();
                         return 0;
@@ -199,7 +199,7 @@ resubmit:
                     !xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
                         goto discard;
 
-                ret = ipprot->handler(&skb);
+                ret = ipprot->handler(skb);
                 if (ret > 0)
                         goto resubmit;
                 else if (ret == 0)
diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index ed3c7b7912a8..6ad19cfc2025 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -628,9 +628,8 @@ out_fail:
         return -1;
 }
 
-static int ipv6_frag_rcv(struct sk_buff **skbp)
+static int ipv6_frag_rcv(struct sk_buff *skb)
 {
-        struct sk_buff *skb = *skbp;
         struct frag_hdr *fhdr;
         struct frag_queue *fq;
         struct ipv6hdr *hdr = ipv6_hdr(skb);
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index a07b59c528f3..737b755342bd 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1668,9 +1668,8 @@ ipv6_pktoptions:
         return 0;
 }
 
-static int tcp_v6_rcv(struct sk_buff **pskb)
+static int tcp_v6_rcv(struct sk_buff *skb)
 {
-        struct sk_buff *skb = *pskb;
         struct tcphdr *th;
         struct sock *sk;
         int ret;
diff --git a/net/ipv6/tunnel6.c b/net/ipv6/tunnel6.c
index 23e2809878ae..6323921b40be 100644
--- a/net/ipv6/tunnel6.c
+++ b/net/ipv6/tunnel6.c
@@ -87,9 +87,8 @@ int xfrm6_tunnel_deregister(struct xfrm6_tunnel *handler, unsigned short family)
 
 EXPORT_SYMBOL(xfrm6_tunnel_deregister);
 
-static int tunnel6_rcv(struct sk_buff **pskb)
+static int tunnel6_rcv(struct sk_buff *skb)
 {
-        struct sk_buff *skb = *pskb;
         struct xfrm6_tunnel *handler;
 
         if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
@@ -106,9 +105,8 @@ drop:
         return 0;
 }
 
-static int tunnel46_rcv(struct sk_buff **pskb)
+static int tunnel46_rcv(struct sk_buff *skb)
 {
-        struct sk_buff *skb = *pskb;
         struct xfrm6_tunnel *handler;
 
         if (!pskb_may_pull(skb, sizeof(struct ipv6hdr)))
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 82ff26dd4470..caebad6ee510 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -405,10 +405,9 @@ static inline int udp6_csum_init(struct sk_buff *skb, struct udphdr *uh,
         return 0;
 }
 
-int __udp6_lib_rcv(struct sk_buff **pskb, struct hlist_head udptable[],
+int __udp6_lib_rcv(struct sk_buff *skb, struct hlist_head udptable[],
                    int proto)
 {
-        struct sk_buff *skb = *pskb;
         struct sock *sk;
         struct udphdr *uh;
         struct net_device *dev = skb->dev;
@@ -494,9 +493,9 @@ discard:
         return 0;
 }
 
-static __inline__ int udpv6_rcv(struct sk_buff **pskb)
+static __inline__ int udpv6_rcv(struct sk_buff *skb)
 {
-        return __udp6_lib_rcv(pskb, udp_hash, IPPROTO_UDP);
+        return __udp6_lib_rcv(skb, udp_hash, IPPROTO_UDP);
 }
 
 /*
diff --git a/net/ipv6/udp_impl.h b/net/ipv6/udp_impl.h
index 6e252f318f7c..2d3fda601232 100644
--- a/net/ipv6/udp_impl.h
+++ b/net/ipv6/udp_impl.h
@@ -6,7 +6,7 @@
 #include <net/addrconf.h>
 #include <net/inet_common.h>
 
-extern int      __udp6_lib_rcv(struct sk_buff **, struct hlist_head [], int );
+extern int      __udp6_lib_rcv(struct sk_buff *, struct hlist_head [], int );
 extern void     __udp6_lib_err(struct sk_buff *, struct inet6_skb_parm *,
                                int , int , int , __be32 , struct hlist_head []);
 
diff --git a/net/ipv6/udplite.c b/net/ipv6/udplite.c
index f54016a55004..766566f7de47 100644
--- a/net/ipv6/udplite.c
+++ b/net/ipv6/udplite.c
@@ -17,9 +17,9 @@
 
 DEFINE_SNMP_STAT(struct udp_mib, udplite_stats_in6) __read_mostly;
 
-static int udplitev6_rcv(struct sk_buff **pskb)
+static int udplitev6_rcv(struct sk_buff *skb)
 {
-        return __udp6_lib_rcv(pskb, udplite_hash, IPPROTO_UDPLITE);
+        return __udp6_lib_rcv(skb, udplite_hash, IPPROTO_UDPLITE);
 }
 
 static void udplitev6_err(struct sk_buff *skb,
diff --git a/net/ipv6/xfrm6_input.c b/net/ipv6/xfrm6_input.c
index c858537cec4b..02f69e544f6f 100644
--- a/net/ipv6/xfrm6_input.c
+++ b/net/ipv6/xfrm6_input.c
@@ -133,9 +133,9 @@ drop:
 
 EXPORT_SYMBOL(xfrm6_rcv_spi);
 
-int xfrm6_rcv(struct sk_buff **pskb)
+int xfrm6_rcv(struct sk_buff *skb)
 {
-        return xfrm6_rcv_spi(*pskb, 0);
+        return xfrm6_rcv_spi(skb, 0);
 }
 
 EXPORT_SYMBOL(xfrm6_rcv);