netfilter: netns nf_conntrack: per-netns /proc/net/stat/nf_conntrack, /proc/net/stat/ip_conntrack

Show correct conntrack count, while I'm at it.
Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: NPatrick McHardy <kaber@trash.net>

net/ipv4/netfilter/nf_conntrack_l3proto_ipv4_compat.c

@@ -285,6 +285,7 @@ static const struct file_operations ip_exp_file_ops = {
 
 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 {
+	struct net *net = seq_file_net(seq);
 	int cpu;
 
 	if (*pos == 0)
@@ -294,7 +295,7 @@ static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 		if (!cpu_possible(cpu))
 			continue;
 		*pos = cpu+1;
-		return per_cpu_ptr(init_net.ct.stat, cpu);
+		return per_cpu_ptr(net->ct.stat, cpu);
 	}
 
 	return NULL;
@@ -302,13 +303,14 @@ static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 
 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
+	struct net *net = seq_file_net(seq);
 	int cpu;
 
 	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
 		if (!cpu_possible(cpu))
 			continue;
 		*pos = cpu+1;
-		return per_cpu_ptr(init_net.ct.stat, cpu);
+		return per_cpu_ptr(net->ct.stat, cpu);
 	}
 
 	return NULL;
@@ -320,7 +322,8 @@ static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
 
 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
 {
-	unsigned int nr_conntracks = atomic_read(&init_net.ct.count);
+	struct net *net = seq_file_net(seq);
+	unsigned int nr_conntracks = atomic_read(&net->ct.count);
 	const struct ip_conntrack_stat *st = v;
 
 	if (v == SEQ_START_TOKEN) {
@@ -360,7 +363,8 @@ static const struct seq_operations ct_cpu_seq_ops = {
 
 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
 {
-	return seq_open(file, &ct_cpu_seq_ops);
+	return seq_open_net(inode, file, &ct_cpu_seq_ops,
+			    sizeof(struct seq_net_private));
 }
 
 static const struct file_operations ct_cpu_seq_fops = {
@@ -368,7 +372,7 @@ static const struct file_operations ct_cpu_seq_fops = {
 	.open    = ct_cpu_seq_open,
 	.read    = seq_read,
 	.llseek  = seq_lseek,
-	.release = seq_release,
+	.release = seq_release_net,
 };
 
 static int __net_init ip_conntrack_net_init(struct net *net)

net/netfilter/nf_conntrack_standalone.c

@@ -194,6 +194,7 @@ static const struct file_operations ct_file_ops = {
 
 static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 {
+	struct net *net = seq_file_net(seq);
 	int cpu;
 
 	if (*pos == 0)
@@ -203,7 +204,7 @@ static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 		if (!cpu_possible(cpu))
 			continue;
 		*pos = cpu + 1;
-		return per_cpu_ptr(init_net.ct.stat, cpu);
+		return per_cpu_ptr(net->ct.stat, cpu);
 	}
 
 	return NULL;
@@ -211,13 +212,14 @@ static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
 
 static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
 {
+	struct net *net = seq_file_net(seq);
 	int cpu;
 
 	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
 		if (!cpu_possible(cpu))
 			continue;
 		*pos = cpu + 1;
-		return per_cpu_ptr(init_net.ct.stat, cpu);
+		return per_cpu_ptr(net->ct.stat, cpu);
 	}
 
 	return NULL;
@@ -229,7 +231,8 @@ static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
 
 static int ct_cpu_seq_show(struct seq_file *seq, void *v)
 {
-	unsigned int nr_conntracks = atomic_read(&init_net.ct.count);
+	struct net *net = seq_file_net(seq);
+	unsigned int nr_conntracks = atomic_read(&net->ct.count);
 	const struct ip_conntrack_stat *st = v;
 
 	if (v == SEQ_START_TOKEN) {
@@ -269,7 +272,8 @@ static const struct seq_operations ct_cpu_seq_ops = {
 
 static int ct_cpu_seq_open(struct inode *inode, struct file *file)
 {
-	return seq_open(file, &ct_cpu_seq_ops);
+	return seq_open_net(inode, file, &ct_cpu_seq_ops,
+			    sizeof(struct seq_net_private));
 }
 
 static const struct file_operations ct_cpu_seq_fops = {
@@ -277,7 +281,7 @@ static const struct file_operations ct_cpu_seq_fops = {
 	.open	 = ct_cpu_seq_open,
 	.read	 = seq_read,
 	.llseek	 = seq_lseek,
-	.release = seq_release,
+	.release = seq_release_net,
 };
 
 static int nf_conntrack_standalone_init_proc(struct net *net)