userns: Convert stat to return values mapped from kuids and kgids

- Store uids and gids with kuid_t and kgid_t in struct kstat
- Convert uid and gids to userspace usable values with
  from_kuid and from_kgid

Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/include/linux/stat.h b/include/linux/stat.h
index 611c398dab7..46132409a3f 100644
--- a/include/linux/stat.h
+++ b/include/linux/stat.h
@@ -58,14 +58,15 @@
 
 #include <linux/types.h>
 #include <linux/time.h>
+#include <linux/uidgid.h>
 
 struct kstat {
 	u64		ino;
 	dev_t		dev;
 	umode_t		mode;
 	unsigned int	nlink;
-	uid_t		uid;
-	gid_t		gid;
+	kuid_t		uid;
+	kgid_t		gid;
 	dev_t		rdev;
 	loff_t		size;
 	struct timespec  atime;