Add support for erofs and squashfs layer media types

OCI artifacts support has landed in various OCI specs v1.1.0 which allows for arbitrary artifact types, small and large. Large artifacts (even existing container images) pose a particular challenge that: 1. it takes too long to download 2. it takes too long to unpack This PR **begins** to address 2. above. squashfs (an older read-only) and erofs (newer) filesystems are already compressed full filesystems, and overlayfs compatible. The downsides are this change becomes very Linux-specific? Signed-off-by: Ramkumar Chinchani <[email protected]>
opencontainers · May 29, 2024 · cfcec6d · cfcec6d
1 parent dd33f72
commit cfcec6d
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/specs-go/v1/mediatype.go b/specs-go/v1/mediatype.go
@@ -45,6 +45,13 @@ const (
 	// MediaTypeImageLayerZstd is the media type used for zstd compressed
 	// layers referenced by the manifest.
 	MediaTypeImageLayerZstd = "application/vnd.oci.image.layer.v1.tar+zstd"
+
+	// MediaTypeErofs specifies the media type as erofs filesystem layer
+	// https://www.iana.org/assignments/media-types/application/vnd.erofs
+	MediaTypeErofs = "application/vnd.erofs"
+
+	// MediaTypeSquashfs specifies the media type as squashfs filesystem layer
+	MediaTypeSquashfs = "application/vnd.squashfs"
 )
 
 // Non-distributable layer media-types.