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Skip aufs whiteout files on userns translation to container

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aufs kernel module creates whiteout files on upper layer delete (and
other situations) and those files already are 'translated' regarding
ownership in host terms (e.g. they are already "0:0" owned), so when
these layers are copied around with pkg/archive we don't want to try and
translate these files regarding ownership.

Docker-DCO-1.1-Signed-off-by: Phil Estes <estesp@linux.vnet.ibm.com> (github: estesp)
This commit is contained in:
Phil Estes 2015-12-09 10:11:32 -05:00
parent 6e9a3453f7
commit aa06163678
1 changed files with 3 additions and 2 deletions
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5
archive/archive.go
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@ -304,8 +304,9 @@ func (ta *tarAppender) addTarFile(path, name string) error {
}
//handle re-mapping container ID mappings back to host ID mappings before
//writing tar headers/files
if ta.UIDMaps != nil || ta.GIDMaps != nil {
//writing tar headers/files. We skip whiteout files because they were written
//by the kernel and already have proper ownership relative to the host
if !strings.HasPrefix(filepath.Base(hdr.Name), WhiteoutPrefix) && (ta.UIDMaps != nil || ta.GIDMaps != nil) {
uid, gid, err := getFileUIDGID(fi.Sys())
if err != nil {
return err