Re: [PATCH] netfilter: ctnetlink: move CTA_TIMEOUT case to outside
From: Pablo Neira Ayuso <pablo@netfilter.org>
Date: 2017-06-29 16:51:32
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lkml, netfilter-devel
On Fri, Jun 09, 2017 at 12:37:47PM +0800, Haishuang Yan wrote:
quoted hunk ↗ jump to hunk
When cda[CTA_TIMEOUT] is zero, ctnetlink_new_conntrack will free allocated ct and return, so move it to outside to optimize this situation. Signed-off-by: Haishuang Yan <redacted> --- net/netfilter/nf_conntrack_netlink.c | 5 +---- 1 file changed, 1 insertion(+), 4 deletions(-)diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index a8be9b7..d1e6b1c 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c@@ -1768,9 +1768,6 @@ static int change_seq_adj(struct nf_ct_seqadj *seq, if (IS_ERR(ct)) return ERR_PTR(-ENOMEM); - if (!cda[CTA_TIMEOUT]) - goto err1;
Actually, I think we would make ctnetlink a better place if we just relax this. I mean, I would like to see how a patch to use the default timeout based on the protocol state looks like. ctnetlink is overly pendantic, in asking things that we can probably infer, just in case the user doesn't specify this.
quoted hunk ↗ jump to hunk
- ct->timeout = nfct_time_stamp + ntohl(nla_get_be32(cda[CTA_TIMEOUT])) * HZ; rcu_read_lock();@@ -1944,7 +1941,7 @@ static int ctnetlink_new_conntrack(struct net *net, struct sock *ctnl, if (nlh->nlmsg_flags & NLM_F_CREATE) { enum ip_conntrack_events events; - if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY]) + if (!cda[CTA_TUPLE_ORIG] || !cda[CTA_TUPLE_REPLY] || !cda[CTA_TIMEOUT]) return -EINVAL; if (otuple.dst.protonum != rtuple.dst.protonum) return -EINVAL;-- 1.8.3.1