netfilter: nf_conntrack: show helper and class in /proc/net/nf_conntrack_expect

[Patrick McHardy <kaber@trash.net>]

commit 8a96ae7fda648925254899ad997d5fe3984d3cf6
Author: Patrick McHardy <kaber@trash.net>
Date:   Wed Jan 20 17:38:16 2010 +0100

    netfilter: nf_conntrack: show helper and class in /proc/net/nf_conntrack_expect
    
    Make the output a bit more informative by showing the helper an expectation
    belongs to and the expectation class.
    
    Signed-off-by: Patrick McHardy <kaber@trash.net>

diff --git a/include/net/netfilter/nf_conntrack_expect.h b/include/net/netfilter/nf_conntrack_expect.h
index 9a2b9cb..917e170 100644
--- a/include/net/netfilter/nf_conntrack_expect.h
+++ b/include/net/netfilter/nf_conntrack_expect.h
@@ -66,6 +66,7 @@ static inline struct net *nf_ct_exp_net(struct nf_conntrack_expect *exp)
 struct nf_conntrack_expect_policy {
 	unsigned int	max_expected;
 	unsigned int	timeout;
+	const char	*name;
 };
 
 #define NF_CT_EXPECT_CLASS_DEFAULT	0
diff --git a/net/netfilter/nf_conntrack_expect.c b/net/netfilter/nf_conntrack_expect.c
index fdf5d2a..5f5f29a 100644
--- a/net/netfilter/nf_conntrack_expect.c
+++ b/net/netfilter/nf_conntrack_expect.c
@@ -500,6 +500,7 @@ static void exp_seq_stop(struct seq_file *seq, void *v)
 static int exp_seq_show(struct seq_file *s, void *v)
 {
 	struct nf_conntrack_expect *expect;
+	struct nf_conntrack_helper *helper;
 	struct hlist_node *n = v;
 	char *delim = "";
 
@@ -525,6 +526,14 @@ static int exp_seq_show(struct seq_file *s, void *v)
 	if (expect->flags & NF_CT_EXPECT_INACTIVE)
 		seq_printf(s, "%sINACTIVE", delim);
 
+	helper = rcu_dereference(nfct_help(expect->master)->helper);
+	if (helper) {
+		seq_printf(s, "%s%s", expect->flags ? " " : "", helper->name);
+		if (helper->expect_policy[expect->class].name)
+			seq_printf(s, "/%s",
+				   helper->expect_policy[expect->class].name);
+	}
+
 	return seq_putc(s, '\n');
 }
 
diff --git a/net/netfilter/nf_conntrack_sip.c b/net/netfilter/nf_conntrack_sip.c
index 4b57216..5b1c24e 100644
--- a/net/netfilter/nf_conntrack_sip.c
+++ b/net/netfilter/nf_conntrack_sip.c
@@ -1305,14 +1305,17 @@ static char sip_names[MAX_PORTS][2][sizeof("sip-65535")] __read_mostly;
 
 static const struct nf_conntrack_expect_policy sip_exp_policy[SIP_EXPECT_MAX + 1] = {
 	[SIP_EXPECT_SIGNALLING] = {
+		.name		= "signalling",
 		.max_expected	= 1,
 		.timeout	= 3 * 60,
 	},
 	[SIP_EXPECT_AUDIO] = {
+		.name		= "audio",
 		.max_expected	= 2 * IP_CT_DIR_MAX,
 		.timeout	= 3 * 60,
 	},
 	[SIP_EXPECT_VIDEO] = {
+		.name		= "video",
 		.max_expected	= 2 * IP_CT_DIR_MAX,
 		.timeout	= 3 * 60,
 	},