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authorPablo Neira Ayuso <pablo@netfilter.org>2012-02-24 14:30:16 +0000
committerDavid S. Miller <davem@davemloft.net>2012-02-26 14:10:44 -0500
commit7175c883071515f0d4c1cece2646203b8a5a7415 (patch)
treef9dfa5be72432611f63f659fbe07ef4fbd6052bd /net/netlink
parent80d326fab534a5380e8f6e509a0b9076655a9670 (diff)
downloadop-kernel-dev-7175c883071515f0d4c1cece2646203b8a5a7415.zip
op-kernel-dev-7175c883071515f0d4c1cece2646203b8a5a7415.tar.gz
netlink: allow to pass data pointer to netlink_dump_start() callback
This patch allows you to pass a data pointer that can be accessed from the dump callback. Netfilter is going to use this patch to provide filtered dumps to user-space. This is specifically interesting in ctnetlink that may handle lots of conntrack entries. We can save precious cycles by skipping the conversion to TLV format of conntrack entries that are not interesting for user-space. More specifically, ctnetlink will include one operation to allow to filter the dumping of conntrack entries by ctmark values. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/netlink')
-rw-r--r--net/netlink/af_netlink.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/net/netlink/af_netlink.c b/net/netlink/af_netlink.c
index ab74845..32bb753 100644
--- a/net/netlink/af_netlink.c
+++ b/net/netlink/af_netlink.c
@@ -1750,6 +1750,7 @@ int netlink_dump_start(struct sock *ssk, struct sk_buff *skb,
cb->dump = control->dump;
cb->done = control->done;
cb->nlh = nlh;
+ cb->data = control->data;
cb->min_dump_alloc = control->min_dump_alloc;
atomic_inc(&skb->users);
cb->skb = skb;
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