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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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net/ipv4/tcp_probe.c
+4 -3
View File
@@ -26,6 +26,7 @@
#include <linux/module.h>
#include <linux/ktime.h>
#include <linux/time.h>
#include <net/net_namespace.h>
#include <net/tcp.h>
@@ -228,7 +229,7 @@ static __init int tcpprobe_init(void)
if (!tcp_probe.log)
goto err0;
if (!proc_net_fops_create(procname, S_IRUSR, &tcpprobe_fops))
if (!proc_net_fops_create(&init_net, procname, S_IRUSR, &tcpprobe_fops))
goto err0;
ret = register_jprobe(&tcp_jprobe);
@@ -238,7 +239,7 @@ static __init int tcpprobe_init(void)
pr_info("TCP probe registered (port=%d)\n", port);
return 0;
err1:
proc_net_remove(procname);
proc_net_remove(&init_net, procname);
err0:
kfree(tcp_probe.log);
return ret;
@@ -247,7 +248,7 @@ module_init(tcpprobe_init);
static __exit void tcpprobe_exit(void)
{
proc_net_remove(procname);
proc_net_remove(&init_net, procname);
unregister_jprobe(&tcp_jprobe);
kfree(tcp_probe.log);
}