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ovl: helper to iterate layers

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Add helper to iterate through all the layers, starting from the upper layer
(if exists) and continuing down through the lower layers.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Miklos Szeredi
2014-12-13 00:59:43 +01:00
parent dd662667e6
commit 5ef88da56a
2 changed files with 22 additions and 0 deletions
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fs/overlayfs/overlayfs.h
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@@ -135,6 +135,7 @@ void ovl_dentry_version_inc(struct dentry *dentry);
void ovl_path_upper(struct dentry *dentry, struct path *path);
void ovl_path_lower(struct dentry *dentry, struct path *path);
enum ovl_path_type ovl_path_real(struct dentry *dentry, struct path *path);
int ovl_path_next(int idx, struct dentry *dentry, struct path *path);
struct dentry *ovl_dentry_upper(struct dentry *dentry);
struct dentry *ovl_dentry_lower(struct dentry *dentry);
struct dentry *ovl_dentry_real(struct dentry *dentry);