2 files changed, 11 insertions, 3 deletions

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index ee6c26d142c3..1a87760d6532 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -168,6 +168,7 @@ struct dentry_operations {
         void (*d_iput)(struct dentry *, struct inode *);
         char *(*d_dname)(struct dentry *, char *, int);
         struct vfsmount *(*d_automount)(struct path *);
+        int (*d_manage)(struct dentry *, bool);
 } ____cacheline_aligned;
 
 /*
@@ -214,8 +215,9 @@ struct dentry_operations {
 
 #define DCACHE_MOUNTED          0x10000 /* is a mountpoint */
 #define DCACHE_NEED_AUTOMOUNT   0x20000 /* handle automount on this dir */
+#define DCACHE_MANAGE_TRANSIT   0x40000 /* manage transit from this dirent */
 #define DCACHE_MANAGED_DENTRY \
-        (DCACHE_MOUNTED|DCACHE_NEED_AUTOMOUNT)
+        (DCACHE_MOUNTED|DCACHE_NEED_AUTOMOUNT|DCACHE_MANAGE_TRANSIT)
 
 extern seqlock_t rename_lock;
 
@@ -404,7 +406,12 @@ static inline void dont_mount(struct dentry *dentry)
 
 extern void dput(struct dentry *);
 
-static inline int d_mountpoint(struct dentry *dentry)
+static inline bool d_managed(struct dentry *dentry)
+{
+        return dentry->d_flags & DCACHE_MANAGED_DENTRY;
+}
+
+static inline bool d_mountpoint(struct dentry *dentry)
 {
         return dentry->d_flags & DCACHE_MOUNTED;
 }
diff --git a/include/linux/namei.h b/include/linux/namei.h
index 18d06add0a40..8ef2c789c2a8 100644
--- a/include/linux/namei.h
+++ b/include/linux/namei.h
@@ -79,7 +79,8 @@ extern struct file *lookup_instantiate_filp(struct nameidata *nd, struct dentry
 
 extern struct dentry *lookup_one_len(const char *, struct dentry *, int);
 
-extern int follow_down(struct path *);
+extern int follow_down_one(struct path *);
+extern int follow_down(struct path *, bool);
 extern int follow_up(struct path *);
 
 extern struct dentry *lock_rename(struct dentry *, struct dentry *);