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ipvs: pull out ip_vs_try_to_schedule function

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This is necessary as we'll be trying to schedule icmp later and we'll want
to share this code.

Signed-off-by: Alex Gartrell <agartrell@fb.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>
This commit is contained in:
Alex Gartrell 2015-08-26 09:40:31 -07:00 committed by Simon Horman
parent 0b72902120
commit 3b5ca61768
1 changed files with 39 additions and 21 deletions
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60
net/netfilter/ipvs/ip_vs_core.c
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@ -1327,6 +1327,42 @@ ip_vs_local_reply6(const struct nf_hook_ops *ops, struct sk_buff *skb,
#endif
static unsigned int
ip_vs_try_to_schedule(int af, struct sk_buff *skb, struct ip_vs_proto_data *pd,
int *verdict, struct ip_vs_conn **cpp,
struct ip_vs_iphdr *iph)
{
struct ip_vs_protocol *pp = pd->pp;
if (!iph->fragoffs) {
/* No (second) fragments need to enter here, as nf_defrag_ipv6
* replayed fragment zero will already have created the cp
*/
/* Schedule and create new connection entry into cpp */
if (!pp->conn_schedule(af, skb, pd, verdict, cpp, iph))
return 0;
}
if (unlikely(!*cpp)) {
/* sorry, all this trouble for a no-hit :) */
IP_VS_DBG_PKT(12, af, pp, skb, iph->off,
"ip_vs_in: packet continues traversal as normal");
if (iph->fragoffs) {
/* Fragment that couldn't be mapped to a conn entry
* is missing module nf_defrag_ipv6
*/
IP_VS_DBG_RL("Unhandled frag, load nf_defrag_ipv6\n");
IP_VS_DBG_PKT(7, af, pp, skb, iph->off,
"unhandled fragment");
}
*verdict = NF_ACCEPT;
return 0;
}
return 1;
}
/*
* Handle ICMP messages in the outside-to-inside direction (incoming).
* Find any that might be relevant, check against existing connections,
@ -1690,33 +1726,15 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb, int af)
cp = NULL;
}
if (unlikely(!cp) && !iph.fragoffs) {
/* No (second) fragments need to enter here, as nf_defrag_ipv6
* replayed fragment zero will already have created the cp
*/
if (unlikely(!cp)) {
int v;
/* Schedule and create new connection entry into &cp */
if (!pp->conn_schedule(af, skb, pd, &v, &cp, &iph))
if (!ip_vs_try_to_schedule(af, skb, pd, &v, &cp, &iph))
return v;
}
if (unlikely(!cp)) {
/* sorry, all this trouble for a no-hit :) */
IP_VS_DBG_PKT(12, af, pp, skb, 0,
"ip_vs_in: packet continues traversal as normal");
if (iph.fragoffs) {
/* Fragment that couldn't be mapped to a conn entry
* is missing module nf_defrag_ipv6
*/
IP_VS_DBG_RL("Unhandled frag, load nf_defrag_ipv6\n");
IP_VS_DBG_PKT(7, af, pp, skb, iph.off,
"unhandled fragment");
}
return NF_ACCEPT;
}
IP_VS_DBG_PKT(11, af, pp, skb, iph.off, "Incoming packet");
/* Check the server status */
if (cp->dest && !(cp->dest->flags & IP_VS_DEST_F_AVAILABLE)) {
/* the destination server is not available */