github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-29 17:43:52 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

netfilter: ctnetlink: remove expired entries first

Browse Source 
When dumping conntrack table to userspace via ctnetlink, check if the ct has
already expired before doing any of the 'skip' checks.

This expires dead entries faster.
/proc handler also removes outdated entries first.

Reported-by: Vitaly Zuevsky <vzuevsky@ns1.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2021-12-09 17:39:26 +01:00 committed by Pablo Neira Ayuso
parent ebb966d3bd
commit 76f12e632a
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
net/netfilter/nf_conntrack_netlink.c
View File

@ -1195,8 +1195,6 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
}
hlist_nulls_for_each_entry(h, n, &nf_conntrack_hash[cb->args[0]],
hnnode) {
if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
continue;
ct = nf_ct_tuplehash_to_ctrack(h);
if (nf_ct_is_expired(ct)) {
if (i < ARRAY_SIZE(nf_ct_evict) &&
@ -1208,6 +1206,9 @@ ctnetlink_dump_table(struct sk_buff *skb, struct netlink_callback *cb)
if (!net_eq(net, nf_ct_net(ct)))
continue;
if (NF_CT_DIRECTION(h) != IP_CT_DIR_ORIGINAL)
continue;
if (cb->args[1]) {
if (ct != last)
continue;