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Subject[PATCH 28/32] union-mount: Basic fallthru definitions
Date
From: Valerie Aurora (Henson) <vaurora@redhat.com>

Define the fallthru dcache flag and file system op.

Signed-off-by: Valerie Aurora (Henson) <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 7930b07..9534813 100644
--- a/include/linux/dcache.h
+++ b/include/linux/dcache.h
@@ -192,6 +192,7 @@ d_iput: no no no yes
#define DCACHE_INOTIFY_PARENT_WATCHED 0x0020 /* Parent inode is watched */
#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 */

extern spinlock_t dcache_lock;
extern seqlock_t rename_lock;
@@ -373,6 +374,11 @@ 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 7f07768..dd9c859 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1351,6 +1351,7 @@ 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);
--
1.6.1.3


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