[NET]: Make /proc/net per network namespace

This patch makes /proc/net per network namespace.  It modifies the global
variables proc_net and proc_net_stat to be per network namespace.
The proc_net file helpers are modified to take a network namespace argument,
and all of their callers are fixed to pass &init_net for that argument.
This ensures that all of the /proc/net files are only visible and
usable in the initial network namespace until the code behind them
has been updated to be handle multiple network namespaces.

Making /proc/net per namespace is necessary as at least some files
in /proc/net depend upon the set of network devices which is per
network namespace, and even more files in /proc/net have contents
that are relevant to a single network namespace.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/net/tokenring/lanstreamer.c b/drivers/net/tokenring/lanstreamer.c
index 5d849c089a3b..fc4495581f96 100644
--- a/drivers/net/tokenring/lanstreamer.c
+++ b/drivers/net/tokenring/lanstreamer.c
@@ -123,6 +123,7 @@
 #include <linux/bitops.h>
 #include <linux/jiffies.h>
 
+#include <net/net_namespace.h>
 #include <net/checksum.h>
 
 #include <asm/io.h>
@@ -250,7 +251,7 @@ static int __devinit streamer_init_one(struct pci_dev *pdev,
 #if STREAMER_NETWORK_MONITOR
 #ifdef CONFIG_PROC_FS
         if (!dev_streamer)
-                create_proc_read_entry("net/streamer_tr", 0, 0,
+                create_proc_read_entry("streamer_tr", 0, init_net.proc_net,
                                         streamer_proc_info, NULL); 
         streamer_priv->next = dev_streamer;
         dev_streamer = streamer_priv;
@@ -423,7 +424,7 @@ static void __devexit streamer_remove_one(struct pci_dev *pdev)
                         }
                 }
                 if (!dev_streamer)
-                        remove_proc_entry("net/streamer_tr", NULL);
+                        remove_proc_entry("streamer_tr", init_net.proc_net);
         }
 #endif
 #endif