[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/netfilter/x_tables.c b/net/netfilter/x_tables.c
index cc2baa6..d9a3bde 100644
--- a/net/netfilter/x_tables.c
+++ b/net/netfilter/x_tables.c
@@ -22,6 +22,7 @@
#include <linux/vmalloc.h>
#include <linux/mutex.h>
#include <linux/mm.h>
+#include <net/net_namespace.h>
#include <linux/netfilter/x_tables.h>
#include <linux/netfilter_arp.h>
@@ -795,7 +796,7 @@
#ifdef CONFIG_PROC_FS
strlcpy(buf, xt_prefix[af], sizeof(buf));
strlcat(buf, FORMAT_TABLES, sizeof(buf));
- proc = proc_net_fops_create(buf, 0440, &xt_file_ops);
+ proc = proc_net_fops_create(&init_net, buf, 0440, &xt_file_ops);
if (!proc)
goto out;
proc->data = (void *) ((unsigned long) af | (TABLE << 16));
@@ -803,14 +804,14 @@
strlcpy(buf, xt_prefix[af], sizeof(buf));
strlcat(buf, FORMAT_MATCHES, sizeof(buf));
- proc = proc_net_fops_create(buf, 0440, &xt_file_ops);
+ proc = proc_net_fops_create(&init_net, buf, 0440, &xt_file_ops);
if (!proc)
goto out_remove_tables;
proc->data = (void *) ((unsigned long) af | (MATCH << 16));
strlcpy(buf, xt_prefix[af], sizeof(buf));
strlcat(buf, FORMAT_TARGETS, sizeof(buf));
- proc = proc_net_fops_create(buf, 0440, &xt_file_ops);
+ proc = proc_net_fops_create(&init_net, buf, 0440, &xt_file_ops);
if (!proc)
goto out_remove_matches;
proc->data = (void *) ((unsigned long) af | (TARGET << 16));
@@ -822,12 +823,12 @@
out_remove_matches:
strlcpy(buf, xt_prefix[af], sizeof(buf));
strlcat(buf, FORMAT_MATCHES, sizeof(buf));
- proc_net_remove(buf);
+ proc_net_remove(&init_net, buf);
out_remove_tables:
strlcpy(buf, xt_prefix[af], sizeof(buf));
strlcat(buf, FORMAT_TABLES, sizeof(buf));
- proc_net_remove(buf);
+ proc_net_remove(&init_net, buf);
out:
return -1;
#endif
@@ -841,15 +842,15 @@
strlcpy(buf, xt_prefix[af], sizeof(buf));
strlcat(buf, FORMAT_TABLES, sizeof(buf));
- proc_net_remove(buf);
+ proc_net_remove(&init_net, buf);
strlcpy(buf, xt_prefix[af], sizeof(buf));
strlcat(buf, FORMAT_TARGETS, sizeof(buf));
- proc_net_remove(buf);
+ proc_net_remove(&init_net, buf);
strlcpy(buf, xt_prefix[af], sizeof(buf));
strlcat(buf, FORMAT_MATCHES, sizeof(buf));
- proc_net_remove(buf);
+ proc_net_remove(&init_net, buf);
#endif /*CONFIG_PROC_FS*/
}
EXPORT_SYMBOL_GPL(xt_proto_fini);
