With the 'verify' feature enabled, all files are indexed on copy up. The copy up origin inode of an indexed non-dir can be used as a unique identifier of the overlay object. This is going to be used for NFS export. Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx> --- fs/overlayfs/util.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c index 0254d7f0d401..f40351dcea7b 100644 --- a/fs/overlayfs/util.c +++ b/fs/overlayfs/util.c @@ -491,6 +491,10 @@ bool ovl_need_index(struct dentry *dentry) if (!lower || !ovl_indexdir(dentry->d_sb)) return false; + /* Index all files for unique origin verification */ + if (!d_is_dir(lower) && ovl_verify(dentry->d_sb)) + return true; + /* Index only lower hardlinks on copy up */ if (!d_is_dir(lower) && d_inode(lower)->i_nlink > 1) return true; -- 2.7.4 -- 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
