xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ipv4: introduce frag_expire_skip_icmp()

Browse Source 
Improve readability of skip ICMP for de-fragmentation expiration logic.
This change will also make the logic easier to maintain when the
following patches in this series are applied.

Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andy Zhou
2015-05-15 14:15:35 -07:00
committed by David S. Miller
parent a2ad5d2ad9
commit 5cf4228082
2 changed files with 19 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
net/ipv4/ip_fragment.c
View File

@@ -173,6 +173,13 @@ static void ipq_kill(struct ipq *ipq)
inet_frag_kill(&ipq->q, &ip4_frags);
}
static bool frag_expire_skip_icmp(u32 user)
{
return user == IP_DEFRAG_AF_PACKET ||
ip_defrag_user_in_between(user, IP_DEFRAG_CONNTRACK_IN,
__IP_DEFRAG_CONNTRACK_IN_END);
}
/*
* Oops, a fragment queue timed out. Kill it and send an ICMP reply.
*/
@@ -217,10 +224,8 @@ static void ip_expire(unsigned long arg)
/* Only an end host needs to send an ICMP
* "Fragment Reassembly Timeout" message, per RFC792.
*/
if (qp->user == IP_DEFRAG_AF_PACKET ||
((qp->user >= IP_DEFRAG_CONNTRACK_IN) &&
(qp->user <= __IP_DEFRAG_CONNTRACK_IN_END) &&
(skb_rtable(head)->rt_type != RTN_LOCAL)))
if (frag_expire_skip_icmp(qp->user) &&
(skb_rtable(head)->rt_type != RTN_LOCAL))
goto out_rcu_unlock;
/* Send an ICMP "Fragment Reassembly Timeout" message. */