[PATCH next 77/84] ipvs: Pass ipvs into ip_vs_in_icmp and ip_vs_in_icmp_v6

["Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>]

With ipvs passed into ip_vs_in_icmp and ip_vs_in_icmp_v6
they no longer need to call the hack that is skb_net.

Additionally ipvs_in_icmp no longer needs to call dev_net(skb->dev)
and can use the ipvs->net instead.

Signed-off-by: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
---
 net/netfilter/ipvs/ip_vs_core.c | 36 ++++++++++++++----------------------
 1 file changed, 14 insertions(+), 22 deletions(-)

diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index 3ab96bdc66fd..0304c7cbb786 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -1388,10 +1388,9 @@ ip_vs_try_to_schedule(struct netns_ipvs *ipvs, int af, 
struct sk_buff *skb,
  *     Currently handles error types - unreachable, quench, ttl exceeded.
  */
 static int
-ip_vs_in_icmp(struct sk_buff *skb, int *related, unsigned int hooknum)
+ip_vs_in_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb, int *related,
+             unsigned int hooknum)
 {
-       struct net *net = NULL;
-       struct netns_ipvs *ipvs;
        struct iphdr *iph;
        struct icmphdr  _icmph, *ic;
        struct iphdr    _ciph, *cih;    /* The ip header contained within the 
ICMP */
@@ -1440,9 +1439,6 @@ ip_vs_in_icmp(struct sk_buff *skb, int *related, unsigned 
int hooknum)
        if (cih == NULL)
                return NF_ACCEPT; /* The packet looks wrong, ignore */
 
-       net = skb_net(skb);
-       ipvs = net_ipvs(net);
-
        /* Special case for errors for IPIP packets */
        ipip = false;
        if (cih->protocol == IPPROTO_IPIP) {
@@ -1520,7 +1516,7 @@ ip_vs_in_icmp(struct sk_buff *skb, int *related, unsigned 
int hooknum)
                        skb_reset_network_header(skb);
                        IP_VS_DBG(12, "ICMP for IPIP %pI4->%pI4: mtu=%u\n",
                                &ip_hdr(skb)->saddr, &ip_hdr(skb)->daddr, mtu);
-                       ipv4_update_pmtu(skb, dev_net(skb->dev),
+                       ipv4_update_pmtu(skb, ipvs->net,
                                         mtu, 0, 0, 0, 0);
                        /* Client uses PMTUD? */
                        if (!(frag_off & htons(IP_DF)))
@@ -1575,11 +1571,10 @@ out:
 }
 
 #ifdef CONFIG_IP_VS_IPV6
-static int ip_vs_in_icmp_v6(struct sk_buff *skb, int *related,
-                           unsigned int hooknum, struct ip_vs_iphdr *iph)
+static int ip_vs_in_icmp_v6(struct netns_ipvs *ipvs, struct sk_buff *skb,
+                           int *related, unsigned int hooknum,
+                           struct ip_vs_iphdr *iph)
 {
-       struct net *net = NULL;
-       struct netns_ipvs *ipvs;
        struct icmp6hdr _icmph, *ic;
        struct ip_vs_iphdr ciph = {.flags = 0, .fragoffs = 0};/*Contained IP */
        struct ip_vs_conn *cp;
@@ -1619,8 +1614,6 @@ static int ip_vs_in_icmp_v6(struct sk_buff *skb, int 
*related,
        if (!ip_vs_fill_iph_skb_icmp(AF_INET6, skb, offset, true, &ciph))
                return NF_ACCEPT;
 
-       net = skb_net(skb);
-       ipvs = net_ipvs(net);
        pd = ip_vs_proto_data_get(ipvs, ciph.protocol);
        if (!pd)
                return NF_ACCEPT;
@@ -1732,8 +1725,8 @@ ip_vs_in(struct netns_ipvs *ipvs, unsigned int hooknum, 
struct sk_buff *skb, int
        if (af == AF_INET6) {
                if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
                        int related;
-                       int verdict = ip_vs_in_icmp_v6(skb, &related, hooknum,
-                                                      &iph);
+                       int verdict = ip_vs_in_icmp_v6(ipvs, skb, &related,
+                                                      hooknum, &iph);
 
                        if (related)
                                return verdict;
@@ -1742,7 +1735,8 @@ ip_vs_in(struct netns_ipvs *ipvs, unsigned int hooknum, 
struct sk_buff *skb, int
 #endif
                if (unlikely(iph.protocol == IPPROTO_ICMP)) {
                        int related;
-                       int verdict = ip_vs_in_icmp(skb, &related, hooknum);
+                       int verdict = ip_vs_in_icmp(ipvs, skb, &related,
+                                                   hooknum);
 
                        if (related)
                                return verdict;
@@ -1895,17 +1889,16 @@ ip_vs_forward_icmp(void *priv, struct sk_buff *skb,
                   const struct nf_hook_state *state)
 {
        int r;
-       struct netns_ipvs *ipvs;
+       struct netns_ipvs *ipvs = net_ipvs(state->net);
 
        if (ip_hdr(skb)->protocol != IPPROTO_ICMP)
                return NF_ACCEPT;
 
        /* ipvs enabled in this netns ? */
-       ipvs = net_ipvs(state->net);
        if (unlikely(sysctl_backup_only(ipvs) || !ipvs->enable))
                return NF_ACCEPT;
 
-       return ip_vs_in_icmp(skb, &r, state->hook);
+       return ip_vs_in_icmp(ipvs, skb, &r, state->hook);
 }
 
 #ifdef CONFIG_IP_VS_IPV6
@@ -1914,7 +1907,7 @@ ip_vs_forward_icmp_v6(void *priv, struct sk_buff *skb,
                      const struct nf_hook_state *state)
 {
        int r;
-       struct netns_ipvs *ipvs;
+       struct netns_ipvs *ipvs = net_ipvs(state->net);
        struct ip_vs_iphdr iphdr;
 
        ip_vs_fill_iph_skb(AF_INET6, skb, false, &iphdr);
@@ -1922,11 +1915,10 @@ ip_vs_forward_icmp_v6(void *priv, struct sk_buff *skb,
                return NF_ACCEPT;
 
        /* ipvs enabled in this netns ? */
-       ipvs = net_ipvs(state->net);
        if (unlikely(sysctl_backup_only(ipvs) || !ipvs->enable))
                return NF_ACCEPT;
 
-       return ip_vs_in_icmp_v6(skb, &r, state->hook, &iphdr);
+       return ip_vs_in_icmp_v6(ipvs, skb, &r, state->hook, &iphdr);
 }
 #endif
 
-- 
2.2.1

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