fs/overlayfs/export.c

48  * copied up and renamed, upper dir /a will be indexed by lower dir /a from
49  * layer 1. The dir /a from layer 2 will never be indexed, so the algorithm (*)
57  * ovl_lookup_real_ancestor() will find the indexed ancestor /a/b and decoding
61  * entry /a in the lower layers above layer N and find the indexed dir /a from
88 	/* We can get upper/overlay path from indexed/lower dentry */  in ovl_connectable_layer()
133 		/* If @parent is connected or indexed we are done */  in ovl_connect_layer()
154  * encoding also after copy up. If non-pure upper is not indexed, then it was
157  * file handle. Overlay root dentry is a private case of non-indexed upper.
165  *  Non-indexed upper	| U
166  *  Indexed upper	| L (*)
173  * possible when there are redirects in lower layers and non-indexed merge dirs.
197 	 * Root is never indexed, so if there's an upper layer, encode upper for  in ovl_check_encode_origin()
204 	 * Upper decodable file handle for non-indexed upper.  in ovl_check_encode_origin()
212 	 * lower dir or under a non-indexed upper is not always possible.  in ovl_check_encode_origin()
219 	/* Lower file handle for indexed and non-upper dir/non-dir */  in ovl_check_encode_origin()
419  * Lookup an indexed or hashed overlay dentry by real inode.
463 		 * back lower parents to the topmost indexed parent. The second  in ovl_lookup_real_inode()
464 		 * recursive call walks back from indexed upper to the topmost  in ovl_lookup_real_inode()
483  * Lookup an indexed or hashed overlay dentry, whose real dentry is an
496 	/* Find the topmost indexed or hashed ancestor */  in ovl_lookup_real_ancestor()
718 	/* Then lookup indexed upper/whiteout by origin fh */  in ovl_lower_fh_to_d()