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authorDavid S. Miller <davem@davemloft.net>2017-06-30 06:27:09 -0700
committerDavid S. Miller <davem@davemloft.net>2017-06-30 06:27:09 -0700
commit52a623bd6189b6ea8f06a0d7594c7604deaab24a (patch)
tree4fc37bf47c28f75c4e5eb0bbf56f2195dc244619 /net/core/net_namespace.c
parentfcce2fdbf478c749aa194e286858f6b6b601f5ee (diff)
parent04ba724b659c6808b0ca31528121bdb2f2807e00 (diff)
downloadblackbird-op-linux-52a623bd6189b6ea8f06a0d7594c7604deaab24a.tar.gz
blackbird-op-linux-52a623bd6189b6ea8f06a0d7594c7604deaab24a.zip
Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next
Pablo Neira Ayuso says: ==================== Netfilter updates for net-next The following patchset contains Netfilter updates for your net-next tree. This batch contains connection tracking updates for the cleanup iteration path, patches from Florian Westphal: X) Skip unconfirmed conntracks in nf_ct_iterate_cleanup_net(), just set dying bit to let the CPU release them. X) Add nf_ct_iterate_destroy() to be used on module removal, to kill conntrack from all namespace. X) Restart iteration on hashtable resizing, since both may occur at the same time. X) Use the new nf_ct_iterate_destroy() to remove conntrack with NAT mapping on module removal. X) Use nf_ct_iterate_destroy() to remove conntrack entries helper module removal, from Liping Zhang. X) Use nf_ct_iterate_cleanup_net() to remove the timeout extension if user requests this, also from Liping. X) Add net_ns_barrier() and use it from FTP helper, so make sure no concurrent namespace removal happens at the same time while the helper module is being removed. X) Use NFPROTO_MAX in layer 3 conntrack protocol array, to reduce module size. Same thing in nf_tables. Updates for the nf_tables infrastructure: X) Prepare usage of the extended ACK reporting infrastructure for nf_tables. X) Remove unnecessary forward declaration in nf_tables hash set. X) Skip set size estimation if number of element is not specified. X) Changes to accomodate a (faster) unresizable hash set implementation, for anonymous sets and dynamic size fixed sets with no timeouts. X) Faster lookup function for unresizable hash table for 2 and 4 bytes key. And, finally, a bunch of asorted small updates and cleanups: X) Do not hold reference to netdev from ipt_CLUSTER, instead subscribe to device events and look up for index from the packet path, this is fixing an issue that is present since the very beginning, patch from Xin Long. X) Use nf_register_net_hook() in ipt_CLUSTER, from Florian Westphal. X) Use ebt_invalid_target() whenever possible in the ebtables tree, from Gao Feng. X) Calm down compilation warning in nf_dup infrastructure, patch from stephen hemminger. X) Statify functions in nftables rt expression, also from stephen. X) Update Makefile to use canonical method to specify nf_tables-objs. From Jike Song. X) Use nf_conntrack_helpers_register() in amanda and H323. X) Space cleanup for ctnetlink, from linzhang. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/net_namespace.c')
-rw-r--r--net/core/net_namespace.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 2178db8e47cd..6a2f41288249 100644
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -501,6 +501,23 @@ static void cleanup_net(struct work_struct *work)
net_drop_ns(net);
}
}
+
+/**
+ * net_ns_barrier - wait until concurrent net_cleanup_work is done
+ *
+ * cleanup_net runs from work queue and will first remove namespaces
+ * from the global list, then run net exit functions.
+ *
+ * Call this in module exit path to make sure that all netns
+ * ->exit ops have been invoked before the function is removed.
+ */
+void net_ns_barrier(void)
+{
+ mutex_lock(&net_mutex);
+ mutex_unlock(&net_mutex);
+}
+EXPORT_SYMBOL(net_ns_barrier);
+
static DECLARE_WORK(net_cleanup_work, cleanup_net);
void __put_net(struct net *net)
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