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overlay: Diffsize: avoid naive diff #1688

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Aug 14, 2023
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overlay: Diffsize: avoid naive diff #1688

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4 changes: 0 additions & 4 deletions drivers/overlay/overlay.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2162,10 +2162,6 @@ func (d *Driver) getLowerDiffPaths(id string) ([]string, error) {
// and its parent and returns the size in bytes of the changes
// relative to its base filesystem directory.
func (d *Driver) DiffSize(id string, idMappings *idtools.IDMappings, parent string, parentMappings *idtools.IDMappings, mountLabel string) (size int64, err error) {
if d.options.mountProgram == "" && (d.useNaiveDiff() || !d.isParent(id, parent)) {
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A random drive-by: Is it really correct to drop the special handling of !d.isParent?

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Thanks!

I think it doesn't matter for the current callers but we probably should do a naive diff if it's not the parent.
@giuseppe WDYT?

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yes, I also think we should do the naive diff in this case.

Thanks @mtrmac for spotting it

return d.naiveDiff.DiffSize(id, idMappings, parent, parentMappings, mountLabel)
}

p, err := d.getDiffPath(id)
if err != nil {
return 0, err
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