netns: assign PDE->data before gluing entry into /proc tree

In this unfortunate case, proc_mkdir_mode wrapper can't be used anymore and
this is no way to reuse proc_create_data due to nlinks assignment. So,
copy the code from proc_mkdir and assign PDE->data at the appropriate
moment.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 0 deletions

diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index 9d53b39a9cf8..43e54e86cefd 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -641,6 +641,23 @@ struct proc_dir_entry *proc_mkdir_mode(const char *name, mode_t mode,
         return ent;
 }
 
+struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name,
+                struct proc_dir_entry *parent)
+{
+        struct proc_dir_entry *ent;
+
+        ent = __proc_create(&parent, name, S_IFDIR | S_IRUGO | S_IXUGO, 2);
+        if (ent) {
+                ent->data = net;
+                if (proc_register(parent, ent) < 0) {
+                        kfree(ent);
+                        ent = NULL;
+                }
+        }
+        return ent;
+}
+EXPORT_SYMBOL_GPL(proc_net_mkdir);
+
 struct proc_dir_entry *proc_mkdir(const char *name,
                 struct proc_dir_entry *parent)
 {