[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/mcast.c b/net/ipv6/mcast.c
index ae98818..a41d5a0 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -49,6 +49,7 @@
#include <linux/netfilter.h>
#include <linux/netfilter_ipv6.h>
+#include <net/net_namespace.h>
#include <net/sock.h>
#include <net/snmp.h>
@@ -2658,8 +2659,8 @@
np->hop_limit = 1;
#ifdef CONFIG_PROC_FS
- proc_net_fops_create("igmp6", S_IRUGO, &igmp6_mc_seq_fops);
- proc_net_fops_create("mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops);
+ proc_net_fops_create(&init_net, "igmp6", S_IRUGO, &igmp6_mc_seq_fops);
+ proc_net_fops_create(&init_net, "mcfilter6", S_IRUGO, &igmp6_mcf_seq_fops);
#endif
return 0;
@@ -2671,7 +2672,7 @@
igmp6_socket = NULL; /* for safety */
#ifdef CONFIG_PROC_FS
- proc_net_remove("mcfilter6");
- proc_net_remove("igmp6");
+ proc_net_remove(&init_net, "mcfilter6");
+ proc_net_remove(&init_net, "igmp6");
#endif
}