@@ -33,6 +33,8 @@ static int flags_by_mnt(int mnt_flags)
flags |= ST_UNBINDABLE;
if (mnt_flags & MNT_SHARED)
flags |= ST_SHARED;
+ else
+ flags |= ST_PRIVATE;
return flags;
}
@@ -41,6 +41,7 @@ struct kstatfs {
#define ST_NODIRATIME (1<<11) /* do not update directory access times */
#define ST_RELATIME (1<<12) /* update atime relative to mtime/ctime */
#define ST_UNBINDABLE (1<<17) /* change to unbindable */
+#define ST_PRIVATE (1<<18) /* change to private */
#define ST_SHARED (1<<20) /* change to shared */
#endif
This lets userspace query whether a mountpoint was made MS_PRIVATE. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> --- fs/statfs.c | 2 ++ include/linux/statfs.h | 1 + 2 files changed, 3 insertions(+)