netfilter: conntrack: don't report events on module removal

During the module removal there are no possible event listeners
since ctnetlink must be removed before to allow removing
nf_conntrack. This patch removes the event reporting for the
module removal case which is not of any use in the existing code.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/include/net/netfilter/nf_conntrack.h b/include/net/netfilter/nf_conntrack.h
index b909241..2ba36dd 100644 (file)
--- a/include/net/netfilter/nf_conntrack.h
+++ b/include/net/netfilter/nf_conntrack.h
@@ -203,7 +203,7 @@ __nf_conntrack_find(struct net *net, const struct nf_conntrack_tuple *tuple);
 
 extern void nf_conntrack_hash_insert(struct nf_conn *ct);
 
-extern void nf_conntrack_flush(struct net *net, u32 pid, int report);
+extern void nf_conntrack_flush_report(struct net *net, u32 pid, int report);
 
 extern bool nf_ct_get_tuplepr(const struct sk_buff *skb,
                              unsigned int nhoff, u_int16_t l3num,

diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c
index 8020db6..f59c4ed 100644 (file)
--- a/net/netfilter/nf_conntrack_core.c
+++ b/net/netfilter/nf_conntrack_core.c
@@ -1001,7 +1001,7 @@ struct __nf_ct_flush_report {
        int report;
 };
 
-static int kill_all(struct nf_conn *i, void *data)
+static int kill_report(struct nf_conn *i, void *data)
 {
        struct __nf_ct_flush_report *fr = (struct __nf_ct_flush_report *)data;
 
@@ -1013,6 +1013,11 @@ static int kill_all(struct nf_conn *i, void *data)
        return 1;
 }
 
+static int kill_all(struct nf_conn *i, void *data)
+{
+       return 1;
+}
+
 void nf_ct_free_hashtable(void *hash, int vmalloced, unsigned int size)
 {
        if (vmalloced)
@@ -1023,15 +1028,15 @@ void nf_ct_free_hashtable(void *hash, int vmalloced, unsigned int size)
 }
 EXPORT_SYMBOL_GPL(nf_ct_free_hashtable);
 
-void nf_conntrack_flush(struct net *net, u32 pid, int report)
+void nf_conntrack_flush_report(struct net *net, u32 pid, int report)
 {
        struct __nf_ct_flush_report fr = {
                .pid    = pid,
                .report = report,
        };
-       nf_ct_iterate_cleanup(net, kill_all, &fr);
+       nf_ct_iterate_cleanup(net, kill_report, &fr);
 }
-EXPORT_SYMBOL_GPL(nf_conntrack_flush);
+EXPORT_SYMBOL_GPL(nf_conntrack_flush_report);
 
 static void nf_conntrack_cleanup_init_net(void)
 {
@@ -1045,7 +1050,7 @@ static void nf_conntrack_cleanup_net(struct net *net)
        nf_ct_event_cache_flush(net);
        nf_conntrack_ecache_fini(net);
  i_see_dead_people:
-       nf_conntrack_flush(net, 0, 0);
+       nf_ct_iterate_cleanup(net, kill_all, NULL);
        if (atomic_read(&net->ct.count) != 0) {
                schedule();
                goto i_see_dead_people;

diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c
index 58fde0e..3a20de1 100644 (file)
--- a/net/netfilter/nf_conntrack_netlink.c
+++ b/net/netfilter/nf_conntrack_netlink.c
@@ -777,9 +777,9 @@ ctnetlink_del_conntrack(struct sock *ctnl, struct sk_buff *skb,
                err = ctnetlink_parse_tuple(cda, &tuple, CTA_TUPLE_REPLY, u3);
        else {
                /* Flush the whole table */
-               nf_conntrack_flush(&init_net, 
-                                  NETLINK_CB(skb).pid, 
-                                  nlmsg_report(nlh));
+               nf_conntrack_flush_report(&init_net,
+                                        NETLINK_CB(skb).pid,
+                                        nlmsg_report(nlh));
                return 0;
        }