netdev - [PATCH 15/31] netns ct: per-netns /proc/net/nf_conntrack, /proc/net/stat/nf

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Message-ID: <20080721164437.GA13390@martell.zuzino.mipt.ru>
Date:	Mon, 21 Jul 2008 20:44:37 +0400
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	kaber@...sh.net
Cc:	netdev@...r.kernel.org, netfilter-devel@...r.kernel.org,
	dev@...nvz.org, xemul@...nvz.org, ebiederm@...ssion.com,
	dlezcano@...ibm.com, benjamin.thery@...l.net
Subject: [PATCH 15/31] netns ct: per-netns /proc/net/nf_conntrack,
	/proc/net/stat/nf_conntrack

/proc/net/nf_conntrack shows honest information,
/proc/net/stat/nf_conntrack created in netns, but shows whole statistics.
Statistics for later.

Signed-off-by: Alexey Dobriyan <adobriyan@...il.com>
---

 net/netfilter/nf_conntrack_standalone.c |   51 +++++++++++++++++++-------------
 1 file changed, 31 insertions(+), 20 deletions(-)

--- a/net/netfilter/nf_conntrack_standalone.c
+++ b/net/netfilter/nf_conntrack_standalone.c
@@ -52,18 +52,20 @@ seq_print_counters(struct seq_file *s,
 #endif
 
 struct ct_iter_state {
+	struct seq_net_private p;
 	unsigned int bucket;
 };
 
 static struct hlist_node *ct_get_first(struct seq_file *seq)
 {
+	struct net *net = seq_file_net(seq);
 	struct ct_iter_state *st = seq->private;
 	struct hlist_node *n;
 
 	for (st->bucket = 0;
 	     st->bucket < nf_conntrack_htable_size;
 	     st->bucket++) {
-		n = rcu_dereference(init_net.ct.hash[st->bucket].first);
+		n = rcu_dereference(net->ct.hash[st->bucket].first);
 		if (n)
 			return n;
 	}
@@ -73,13 +75,14 @@ static struct hlist_node *ct_get_first(struct seq_file *seq)
 static struct hlist_node *ct_get_next(struct seq_file *seq,
 				      struct hlist_node *head)
 {
+	struct net *net = seq_file_net(seq);
 	struct ct_iter_state *st = seq->private;
 
 	head = rcu_dereference(head->next);
 	while (head == NULL) {
 		if (++st->bucket >= nf_conntrack_htable_size)
 			return NULL;
-		head = rcu_dereference(init_net.ct.hash[st->bucket].first);
+		head = rcu_dereference(net->ct.hash[st->bucket].first);
 	}
 	return head;
 }
@@ -189,7 +192,7 @@ static const struct seq_operations ct_seq_ops = {
 
 static int ct_open(struct inode *inode, struct file *file)
 {
-	return seq_open_private(file, &ct_seq_ops,
+	return seq_open_net(inode, file, &ct_seq_ops,
 			sizeof(struct ct_iter_state));
 }
 
@@ -198,7 +201,7 @@ static const struct file_operations ct_file_ops = {
 	.open    = ct_open,
 	.read    = seq_read,
 	.llseek  = seq_lseek,
-	.release = seq_release_private,
+	.release = seq_release_net,
 };
 
 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
@@ -289,38 +292,38 @@ static const struct file_operations ct_cpu_seq_fops = {
 	.release = seq_release,
 };
 
-static int nf_conntrack_standalone_init_proc(void)
+static int nf_conntrack_standalone_init_proc(struct net *net)
 {
 	struct proc_dir_entry *pde;
 
-	pde = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops);
+	pde = proc_net_fops_create(net, "nf_conntrack", 0440, &ct_file_ops);
 	if (!pde)
 		goto out_nf_conntrack;
 
-	pde = proc_create("nf_conntrack", S_IRUGO, init_net.proc_net_stat,
+	pde = proc_create("nf_conntrack", S_IRUGO, net->proc_net_stat,
 			  &ct_cpu_seq_fops);
 	if (!pde)
 		goto out_stat_nf_conntrack;
 	return 0;
 
 out_stat_nf_conntrack:
-	proc_net_remove(&init_net, "nf_conntrack");
+	proc_net_remove(net, "nf_conntrack");
 out_nf_conntrack:
 	return -ENOMEM;
 }
 
-static void nf_conntrack_standalone_fini_proc(void)
+static void nf_conntrack_standalone_fini_proc(struct net *net)
 {
-	remove_proc_entry("nf_conntrack", init_net.proc_net_stat);
-	proc_net_remove(&init_net, "nf_conntrack");
+	remove_proc_entry("nf_conntrack", net->proc_net_stat);
+	proc_net_remove(net, "nf_conntrack");
 }
 #else
-static int nf_conntrack_standalone_init_proc(void)
+static int nf_conntrack_standalone_init_proc(struct net *net)
 {
 	return 0;
 }
 
-static void nf_conntrack_standalone_fini_proc(void)
+static void nf_conntrack_standalone_fini_proc(struct net *net)
 {
 }
 #endif /* CONFIG_PROC_FS */
@@ -448,11 +451,25 @@ static void nf_conntrack_standalone_fini_sysctl(void)
 
 static int nf_conntrack_net_init(struct net *net)
 {
-	return nf_conntrack_init(net);
+	int ret;
+
+	ret = nf_conntrack_init(net);
+	if (ret < 0)
+		goto out_init;
+	ret = nf_conntrack_standalone_init_proc(net);
+	if (ret < 0)
+		goto out_proc;
+	return 0;
+
+out_proc:
+	nf_conntrack_cleanup(net);
+out_init:
+	return ret;
 }
 
 static void nf_conntrack_net_exit(struct net *net)
 {
+	nf_conntrack_standalone_fini_proc(net);
 	nf_conntrack_cleanup(net);
 }
 
@@ -468,17 +485,12 @@ static int __init nf_conntrack_standalone_init(void)
 	ret = register_pernet_subsys(&nf_conntrack_net_ops);
 	if (ret < 0)
 		goto out;
-	ret = nf_conntrack_standalone_init_proc();
-	if (ret < 0)
-		goto out_proc;
 	ret = nf_conntrack_standalone_init_sysctl();
 	if (ret < 0)
 		goto out_sysctl;
 	return 0;
 
 out_sysctl:
-	nf_conntrack_standalone_fini_proc();
-out_proc:
 	unregister_pernet_subsys(&nf_conntrack_net_ops);
 out:
 	return ret;
@@ -487,7 +499,6 @@ out:
 static void __exit nf_conntrack_standalone_fini(void)
 {
 	nf_conntrack_standalone_fini_sysctl();
-	nf_conntrack_standalone_fini_proc();
 	unregister_pernet_subsys(&nf_conntrack_net_ops);
 }
 
-- 
1.5.4.5


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