net: skb->dst accessors

Define three accessors to get/set dst attached to a skb

struct dst_entry *skb_dst(const struct sk_buff *skb)

void skb_dst_set(struct sk_buff *skb, struct dst_entry *dst)

void skb_dst_drop(struct sk_buff *skb)
This one should replace occurrences of :
dst_release(skb->dst)
skb->dst = NULL;

Delete skb->dst field

Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 11 deletions

diff --git a/net/ipv6/reassembly.c b/net/ipv6/reassembly.c
index e9ac7a12f595..54a387d31e1a 100644
--- a/net/ipv6/reassembly.c
+++ b/net/ipv6/reassembly.c
@@ -267,7 +267,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
         struct sk_buff *prev, *next;
         struct net_device *dev;
         int offset, end;
-        struct net *net = dev_net(skb->dst->dev);
+        struct net *net = dev_net(skb_dst(skb)->dev);
 
         if (fq->q.last_in & INET_FRAG_COMPLETE)
                 goto err;
@@ -277,7 +277,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
                         ((u8 *)(fhdr + 1) - (u8 *)(ipv6_hdr(skb) + 1)));
 
         if ((unsigned int)end > IPV6_MAXPLEN) {
-                IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+                IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                  IPSTATS_MIB_INHDRERRORS);
                 icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
                                   ((u8 *)&fhdr->frag_off -
@@ -310,7 +310,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
                         /* RFC2460 says always send parameter problem in
                          * this case. -DaveM
                          */
-                        IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst),
+                        IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)),
                                          IPSTATS_MIB_INHDRERRORS);
                         icmpv6_param_prob(skb, ICMPV6_HDR_FIELD,
                                           offsetof(struct ipv6hdr, payload_len));
@@ -434,7 +434,7 @@ static int ip6_frag_queue(struct frag_queue *fq, struct sk_buff *skb,
         return -1;
 
 err:
-        IP6_INC_STATS(net, ip6_dst_idev(skb->dst),
+        IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)),
                       IPSTATS_MIB_REASMFAILS);
         kfree_skb(skb);
         return -1;
@@ -576,9 +576,9 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
         struct frag_hdr *fhdr;
         struct frag_queue *fq;
         struct ipv6hdr *hdr = ipv6_hdr(skb);
-        struct net *net = dev_net(skb->dst->dev);
+        struct net *net = dev_net(skb_dst(skb)->dev);
 
-        IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMREQDS);
+        IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_REASMREQDS);
 
         /* Jumbo payload inhibits frag. header */
         if (hdr->payload_len==0)
@@ -595,17 +595,17 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
                 /* It is not a fragmented frame */
                 skb->transport_header += sizeof(struct frag_hdr);
                 IP6_INC_STATS_BH(net,
-                                 ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMOKS);
+                                 ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_REASMOKS);
 
                 IP6CB(skb)->nhoff = (u8 *)fhdr - skb_network_header(skb);
                 return 1;
         }
 
         if (atomic_read(&net->ipv6.frags.mem) > net->ipv6.frags.high_thresh)
-                ip6_evictor(net, ip6_dst_idev(skb->dst));
+                ip6_evictor(net, ip6_dst_idev(skb_dst(skb)));
 
         if ((fq = fq_find(net, fhdr->identification, &hdr->saddr, &hdr->daddr,
-                          ip6_dst_idev(skb->dst))) != NULL) {
+                          ip6_dst_idev(skb_dst(skb)))) != NULL) {
                 int ret;
 
                 spin_lock(&fq->q.lock);
@@ -617,12 +617,12 @@ static int ipv6_frag_rcv(struct sk_buff *skb)
                 return ret;
         }
 
-        IP6_INC_STATS_BH(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_REASMFAILS);
+        IP6_INC_STATS_BH(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_REASMFAILS);
         kfree_skb(skb);
         return -1;
 
 fail_hdr:
-        IP6_INC_STATS(net, ip6_dst_idev(skb->dst), IPSTATS_MIB_INHDRERRORS);
+        IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_INHDRERRORS);
         icmpv6_param_prob(skb, ICMPV6_HDR_FIELD, skb_network_header_len(skb));
         return -1;
 }