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netfilter: cttimeout: use nf_ct_iterate_cleanup_net to unlink timeout objs 

Similar to nf_conntrack_helper, we can use nf_ct_iterare_cleanup_net to
remove these copy & paste code.

Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Liping Zhang 2017-05-28 22:37:19 +08:00 committed by Pablo Neira Ayuso
parent ff1acc4964
commit 34158151d2
1 changed files with 5 additions and 34 deletions
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39
net/netfilter/nfnetlink_cttimeout.c
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@ -287,49 +287,20 @@ static int cttimeout_get_timeout(struct net *net, struct sock *ctnl,
return ret;
}
static void untimeout(struct nf_conntrack_tuple_hash *i,
struct ctnl_timeout *timeout)
static int untimeout(struct nf_conn *ct, void *timeout)
{
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(i);
struct nf_conn_timeout *timeout_ext = nf_ct_timeout_find(ct);
if (timeout_ext && (!timeout || timeout_ext->timeout == timeout))
RCU_INIT_POINTER(timeout_ext->timeout, NULL);
/* We are not intended to delete this conntrack. */
return 0;
}
static void ctnl_untimeout(struct net *net, struct ctnl_timeout *timeout)
{
struct nf_conntrack_tuple_hash *h;
const struct hlist_nulls_node *nn;
unsigned int last_hsize;
spinlock_t *lock;
int i, cpu;
for_each_possible_cpu(cpu) {
struct ct_pcpu *pcpu = per_cpu_ptr(net->ct.pcpu_lists, cpu);
spin_lock_bh(&pcpu->lock);
hlist_nulls_for_each_entry(h, nn, &pcpu->unconfirmed, hnnode)
untimeout(h, timeout);
spin_unlock_bh(&pcpu->lock);
}
local_bh_disable();
restart:
last_hsize = nf_conntrack_htable_size;
for (i = 0; i < last_hsize; i++) {
lock = &nf_conntrack_locks[i % CONNTRACK_LOCKS];
nf_conntrack_lock(lock);
if (last_hsize != nf_conntrack_htable_size) {
spin_unlock(lock);
goto restart;
}
hlist_nulls_for_each_entry(h, nn, &nf_conntrack_hash[i], hnnode)
untimeout(h, timeout);
spin_unlock(lock);
}
local_bh_enable();
nf_ct_iterate_cleanup_net(net, untimeout, timeout, 0, 0);
}
/* try to delete object, fail if it is still in use. */