| package archive // import "github.com/docker/docker/pkg/archive" | |
| // Whiteouts are files with a special meaning for the layered filesystem. | |
| // Docker uses AUFS whiteout files inside exported archives. In other | |
| // filesystems these files are generated/handled on tar creation/extraction. | |
| // WhiteoutPrefix prefix means file is a whiteout. If this is followed by a | |
| // filename this means that file has been removed from the base layer. | |
| const WhiteoutPrefix = ".wh." | |
| // WhiteoutMetaPrefix prefix means whiteout has a special meaning and is not | |
| // for removing an actual file. Normally these files are excluded from exported | |
| // archives. | |
| const WhiteoutMetaPrefix = WhiteoutPrefix + WhiteoutPrefix | |
| // WhiteoutLinkDir is a directory AUFS uses for storing hardlink links to other | |
| // layers. Normally these should not go into exported archives and all changed | |
| // hardlinks should be copied to the top layer. | |
| const WhiteoutLinkDir = WhiteoutMetaPrefix + "plnk" | |
| // WhiteoutOpaqueDir file means directory has been made opaque - meaning | |
| // readdir calls to this directory do not follow to lower layers. | |
| const WhiteoutOpaqueDir = WhiteoutMetaPrefix + ".opq" |