[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>
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

View File

@@ -91,6 +91,7 @@
#include <linux/hash.h>
#include <linux/sort.h>
#include <linux/proc_fs.h>
#include <net/net_namespace.h>
#include <net/dst.h>
#include <net/ip.h>
#include <net/udp.h>
@@ -2444,7 +2445,7 @@ static int __init pppol2tp_init(void)
goto out_unregister_pppol2tp_proto;
#ifdef CONFIG_PROC_FS
pppol2tp_proc = create_proc_entry("pppol2tp", 0, proc_net);
pppol2tp_proc = create_proc_entry("pppol2tp", 0, init_net.proc_net);
if (!pppol2tp_proc) {
err = -ENOMEM;
goto out_unregister_pppox_proto;
@@ -2469,7 +2470,7 @@ static void __exit pppol2tp_exit(void)
unregister_pppox_proto(PX_PROTO_OL2TP);
#ifdef CONFIG_PROC_FS
remove_proc_entry("pppol2tp", proc_net);
remove_proc_entry("pppol2tp", init_net.proc_net);
#endif
proto_unregister(&pppol2tp_sk_proto);
}