Extend PutLayer to optimize reusing data from existing layers #1830
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When the caller provides neither OriginalDigest nor UncompressedDigest, only digest the layer once. Signed-off-by: Miloslav Trmač <mitr@redhat.com>
This allows us to correctly set (CompresedDigest, CompressedSize) when copying data from another layer; in that case we don't have the compressed data, so computing the size from compressedCounter sets an incorrect value. Signed-off-by: Miloslav Trmač <mitr@redhat.com>
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Signed-off-by: Miloslav Trmač <mitr@redhat.com>
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LayersByTOCDigest), only digest uncompressed input once, not twiceCompressedSizevalue to matchCompressedDigest, so that we don't create layers with incorrect metadata.Motivated by containers/image#2288 .
Cc: @giuseppe (fairly low priority)