Define the fallthru dcache flag and file system op.
Signed-off-by: Valerie Aurora <vaurora@xxxxxxxxxx>
---
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
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