[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>
diff --git a/net/ipv4/tcp_probe.c b/net/ipv4/tcp_probe.c
index b76398d..87dd5bf 100644
--- a/net/ipv4/tcp_probe.c
+++ b/net/ipv4/tcp_probe.c
@@ -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 @@
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 @@
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 @@
static __exit void tcpprobe_exit(void)
{
- proc_net_remove(procname);
+ proc_net_remove(&init_net, procname);
unregister_jprobe(&tcp_jprobe);
kfree(tcp_probe.log);
}
