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Diffstat (limited to 'vendor/github.com/fsouza/go-dockerclient/internal/archive/whiteouts.go')
| -rw-r--r-- | vendor/github.com/fsouza/go-dockerclient/internal/archive/whiteouts.go | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/vendor/github.com/fsouza/go-dockerclient/internal/archive/whiteouts.go b/vendor/github.com/fsouza/go-dockerclient/internal/archive/whiteouts.go new file mode 100644 index 000000000..a61c22a08 --- /dev/null +++ b/vendor/github.com/fsouza/go-dockerclient/internal/archive/whiteouts.go @@ -0,0 +1,27 @@ +// Copyright 2014 Docker authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the DOCKER-LICENSE file. + +package 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" |