diff mbox

net: make /proc/net/protocols namespace aware

Message ID 49214D37.2090502@cosmosbay.com
State Superseded, archived
Delegated to: David Miller
Headers show

Commit Message

Eric Dumazet Nov. 17, 2008, 10:53 a.m. UTC 
Eric Dumazet a écrit :
> Converting /proc/net/protocols to be namespace aware is quite easy
> and permits us to use sock_prot_inuse_get().
> 
> This provides seperate counters for each protocol. For example
> we can really count TCPv6 sockets and TCPv4 sockets, while previously,
> we had the same value, and this value was not namespace aware.
> 
> Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
> ---
> net/core/sock.c |   27 +++++++++++++++++++++++----
> 1 files changed, 23 insertions(+), 4 deletions(-)
> 

Oops wrong attached file... sorry

[PATCH] net: make /proc/net/protocols namespace aware

Converting /proc/net/protocols to be namespace aware is quite easy
and permits us to use sock_prot_inuse_get().

This provides seperate counters for each protocol. For example
we can really count TCPv6 sockets and TCPv4 sockets, while previously,
we had the same value, and this value was not namespace aware.

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
---
net/core/sock.c |   27 +++++++++++++++++++++++----
1 files changed, 23 insertions(+), 4 deletions(-)

Comments

Alexey Dobriyan Nov. 17, 2008, 11:15 a.m. UTC | #1 
On Mon, Nov 17, 2008 at 11:53:43AM +0100, Eric Dumazet wrote:
> --- a/net/core/sock.c
> +++ b/net/core/sock.c

> @@ -2230,7 +2230,8 @@ static const struct seq_operations proto_seq_ops = {
>  
>  static int proto_seq_open(struct inode *inode, struct file *file)
>  {
> -	return seq_open(file, &proto_seq_ops);
> +	return seq_open_net(inode, file, &proto_seq_ops,
> +			    sizeof(struct seq_net_private));

You have to hook seq_release_net if you do this.

>  }
>  
>  static const struct file_operations proto_seq_fops = {
> @@ -2241,10 +2242,28 @@ static const struct file_operations proto_seq_fops = {
>  	.release	= seq_release,
	+.release	= seq_release_net,
--
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diff mbox

Patch

diff --git a/net/core/sock.c b/net/core/sock.c
index 38de9c3..566eb82 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -2176,7 +2176,7 @@  static void proto_seq_printf(struct seq_file *seq, struct proto *proto)
 			"%2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c %2c\n",
 		   proto->name,
 		   proto->obj_size,
-		   proto->sockets_allocated != NULL ? atomic_read(proto->sockets_allocated) : -1,
+		   sock_prot_inuse_get(seq_file_net(seq), proto),
 		   proto->memory_allocated != NULL ? atomic_read(proto->memory_allocated) : -1,
 		   proto->memory_pressure != NULL ? *proto->memory_pressure ? "yes" : "no" : "NI",
 		   proto->max_header,
@@ -2230,7 +2230,8 @@  static const struct seq_operations proto_seq_ops = {
 
 static int proto_seq_open(struct inode *inode, struct file *file)
 {
-	return seq_open(file, &proto_seq_ops);
+	return seq_open_net(inode, file, &proto_seq_ops,
+			    sizeof(struct seq_net_private));
 }
 
 static const struct file_operations proto_seq_fops = {
@@ -2241,10 +2242,28 @@  static const struct file_operations proto_seq_fops = {
 	.release	= seq_release,
 };
 
+static __net_init int proto_init_net(struct net *net)
+{
+	if (!proc_net_fops_create(net, "protocols", S_IRUGO, &proto_seq_fops))
+		return -ENOMEM;
+
+	return 0;
+}
+
+static __net_exit void proto_exit_net(struct net *net)
+{
+	proc_net_remove(net, "protocols");
+}
+
+
+static __net_initdata struct pernet_operations proto_net_ops = {
+	.init = proto_init_net,
+	.exit = proto_exit_net,
+};
+
 static int __init proto_init(void)
 {
-	/* register /proc/net/protocols */
-	return proc_net_fops_create(&init_net, "protocols", S_IRUGO, &proto_seq_fops) == NULL ? -ENOBUFS : 0;
+	return register_pernet_subsys(&proto_net_ops);
 }
 
 subsys_initcall(proto_init);