[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/ipv6/proc.c b/net/ipv6/proc.c
index 920dc9c..a712a22 100644
--- a/net/ipv6/proc.c
+++ b/net/ipv6/proc.c
@@ -23,6 +23,7 @@
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/stddef.h>
+#include <net/net_namespace.h>
#include <net/ip.h>
#include <net/sock.h>
#include <net/tcp.h>
@@ -231,22 +232,22 @@
{
int rc = 0;
- if (!proc_net_fops_create("snmp6", S_IRUGO, &snmp6_seq_fops))
+ if (!proc_net_fops_create(&init_net, "snmp6", S_IRUGO, &snmp6_seq_fops))
goto proc_snmp6_fail;
- proc_net_devsnmp6 = proc_mkdir("dev_snmp6", proc_net);
+ proc_net_devsnmp6 = proc_mkdir("dev_snmp6", init_net.proc_net);
if (!proc_net_devsnmp6)
goto proc_dev_snmp6_fail;
- if (!proc_net_fops_create("sockstat6", S_IRUGO, &sockstat6_seq_fops))
+ if (!proc_net_fops_create(&init_net, "sockstat6", S_IRUGO, &sockstat6_seq_fops))
goto proc_sockstat6_fail;
out:
return rc;
proc_sockstat6_fail:
- proc_net_remove("dev_snmp6");
+ proc_net_remove(&init_net, "dev_snmp6");
proc_dev_snmp6_fail:
- proc_net_remove("snmp6");
+ proc_net_remove(&init_net, "snmp6");
proc_snmp6_fail:
rc = -ENOMEM;
goto out;
@@ -254,8 +255,8 @@
void ipv6_misc_proc_exit(void)
{
- proc_net_remove("sockstat6");
- proc_net_remove("dev_snmp6");
- proc_net_remove("snmp6");
+ proc_net_remove(&init_net, "sockstat6");
+ proc_net_remove(&init_net, "dev_snmp6");
+ proc_net_remove(&init_net, "snmp6");
}