Add an helper to retrieve real data inode associated with overlay inode.
This helper will ignore all metacopy inodes and will return only the
real inode which has data.
Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
---
fs/overlayfs/overlayfs.h | 1 +
fs/overlayfs/util.c | 12 ++++++++++++
2 files changed, 13 insertions(+)
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 29c3498a7e61..e24af484967f 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -236,6 +236,7 @@ struct inode *ovl_inode_upper(struct inode *inode);
struct inode *ovl_inode_lower(struct inode *inode);
struct inode *ovl_inode_lowerdata(struct inode *inode);
struct inode *ovl_inode_real(struct inode *inode);
+struct inode *ovl_inode_real_data(struct inode *inode);
struct ovl_dir_cache *ovl_dir_cache(struct inode *inode);
void ovl_set_dir_cache(struct inode *inode, struct ovl_dir_cache *cache);
void ovl_dentry_set_flag(unsigned long flag, struct dentry *dentry);
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index 58aa14a02bb0..c7a1bd40dc6a 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -268,6 +268,18 @@ struct inode *ovl_inode_lowerdata(struct inode *inode)
return OVL_I(inode)->lowerdata ?: ovl_inode_lower(inode);
}
+/* Return real inode which contains data. Does not return metacopy inode */
+struct inode *ovl_inode_real_data(struct inode *inode)
+{
+ struct inode *upperinode;
+
+ upperinode = ovl_inode_upper(inode);
+ if (upperinode && ovl_has_upperdata(inode))
+ return upperinode;
+
+ return ovl_inode_lowerdata(inode);
+}
+
struct ovl_dir_cache *ovl_dir_cache(struct inode *inode)
{
--
2.13.6
--
To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
