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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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5
net/unix/af_unix.c
View file

@ -103,6 +103,7 @@
#include <asm/uaccess.h>
#include <linux/skbuff.h>
#include <linux/netdevice.h>
#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/tcp_states.h>
#include <net/af_unix.h>
@ -2135,7 +2136,7 @@ static int __init af_unix_init(void)
sock_register(&unix_family_ops);
#ifdef CONFIG_PROC_FS
proc_net_fops_create("unix", 0, &unix_seq_fops);
proc_net_fops_create(&init_net, "unix", 0, &unix_seq_fops);
#endif
unix_sysctl_register();
out:
@ -2146,7 +2147,7 @@ static void __exit af_unix_exit(void)
{
sock_unregister(PF_UNIX);
unix_sysctl_unregister();
proc_net_remove("unix");
proc_net_remove(&init_net, "unix");
proto_unregister(&unix_proto);
}