[PATCH 30/41] fallthru: Basic fallthru definitions

[Valerie Aurora <vaurora@redhat.com>]

Define the fallthru dcache flag and file system op.

Signed-off-by: Valerie Aurora <vaurora@redhat.com>
---
 include/linux/dcache.h |    6 ++++++
 include/linux/fs.h     |    1 +
 2 files changed, 7 insertions(+), 0 deletions(-)

diff --git a/include/linux/dcache.h b/include/linux/dcache.h
index 730c432..a55f79f 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -193,6 +193,7 @@ d_iput:		no		no		no       yes
 
 #define DCACHE_COOKIE		0x0040	/* For use by dcookie subsystem */
 #define DCACHE_WHITEOUT		0x0080	/* This negative dentry is a whiteout */
+#define DCACHE_FALLTHRU		0x0100	/* Keep looking in the file system below */
 
 #define DCACHE_FSNOTIFY_PARENT_WATCHED	0x0080 /* Parent inode is watched by some fsnotify listener */
 
@@ -381,6 +382,11 @@ static inline int d_is_whiteout(struct dentry *dentry)
 	return (dentry->d_flags & DCACHE_WHITEOUT);
 }
 
+static inline int d_is_fallthru(struct dentry *dentry)
+{
+	return (dentry->d_flags & DCACHE_FALLTHRU);
+}
+
 static inline struct dentry *dget_parent(struct dentry *dentry)
 {
 	struct dentry *ret;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index efea78c..57690ab 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1532,6 +1532,7 @@ struct inode_operations {
 	int (*rmdir) (struct inode *,struct dentry *);
 	int (*mknod) (struct inode *,struct dentry *,int,dev_t);
 	int (*whiteout) (struct inode *, struct dentry *, struct dentry *);
+	int (*fallthru) (struct inode *, struct dentry *);
 	int (*rename) (struct inode *, struct dentry *,
 			struct inode *, struct dentry *);
 	int (*readlink) (struct dentry *, char __user *,int);
-- 
1.6.3.3