[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/core/pktgen.c b/net/core/pktgen.c
index 84c0ede..33d7247 100644
--- a/net/core/pktgen.c
+++ b/net/core/pktgen.c
@@ -152,6 +152,7 @@
#include <linux/wait.h>
#include <linux/etherdevice.h>
#include <linux/kthread.h>
+#include <net/net_namespace.h>
#include <net/checksum.h>
#include <net/ipv6.h>
#include <net/addrconf.h>
@@ -3808,7 +3809,7 @@
printk(KERN_INFO "%s", version);
- pg_proc_dir = proc_mkdir(PG_PROC_DIR, proc_net);
+ pg_proc_dir = proc_mkdir(PG_PROC_DIR, init_net.proc_net);
if (!pg_proc_dir)
return -ENODEV;
pg_proc_dir->owner = THIS_MODULE;
@@ -3817,7 +3818,7 @@
if (pe == NULL) {
printk(KERN_ERR "pktgen: ERROR: cannot create %s "
"procfs entry.\n", PGCTRL);
- proc_net_remove(PG_PROC_DIR);
+ proc_net_remove(&init_net, PG_PROC_DIR);
return -EINVAL;
}
@@ -3841,7 +3842,7 @@
"all threads\n");
unregister_netdevice_notifier(&pktgen_notifier_block);
remove_proc_entry(PGCTRL, pg_proc_dir);
- proc_net_remove(PG_PROC_DIR);
+ proc_net_remove(&init_net, PG_PROC_DIR);
return -ENODEV;
}
@@ -3868,7 +3869,7 @@
/* Clean up proc file system */
remove_proc_entry(PGCTRL, pg_proc_dir);
- proc_net_remove(PG_PROC_DIR);
+ proc_net_remove(&init_net, PG_PROC_DIR);
}
module_init(pg_init);