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

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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>
This commit is contained in:
Eric W. Biederman
2007-09-12 12:01:34 +02:00
committed by David S. Miller
parent 07feaebfcc
commit 457c4cbc5a
84 changed files with 342 additions and 261 deletions
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19
net/core/dev.c
View File

@@ -92,6 +92,7 @@
#include <linux/etherdevice.h>
#include <linux/notifier.h>
#include <linux/skbuff.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <linux/rtnetlink.h>
#include <linux/proc_fs.h>
@@ -2556,24 +2557,24 @@ static int __init dev_proc_init(void)
{
int rc = -ENOMEM;
if (!proc_net_fops_create("dev", S_IRUGO, &dev_seq_fops))
if (!proc_net_fops_create(&init_net, "dev", S_IRUGO, &dev_seq_fops))
goto out;
if (!proc_net_fops_create("softnet_stat", S_IRUGO, &softnet_seq_fops))
if (!proc_net_fops_create(&init_net, "softnet_stat", S_IRUGO, &softnet_seq_fops))
goto out_dev;
if (!proc_net_fops_create("ptype", S_IRUGO, &ptype_seq_fops))
goto out_dev2;
if (!proc_net_fops_create(&init_net, "ptype", S_IRUGO, &ptype_seq_fops))
goto out_softnet;
if (wext_proc_init())
goto out_softnet;
goto out_ptype;
rc = 0;
out:
return rc;
out_ptype:
proc_net_remove(&init_net, "ptype");
out_softnet:
proc_net_remove("ptype");
out_dev2:
proc_net_remove("softnet_stat");
proc_net_remove(&init_net, "softnet_stat");
out_dev:
proc_net_remove("dev");
proc_net_remove(&init_net, "dev");
goto out;
}
#else