fs/erofs: Introduce new features including ztailpacking, fragments and dedupe

This patch updates erofs driver code to catch up with the latest code of
erofs_utils (commit e4939f9eaa177e05d697ace85d8dc283e25dc2ed).

LZMA will be supported in the separate patch later.

Signed-off-by: Yifan Zhao <zhaoyifan@sjtu.edu.cn>
Reviewed-by: Huang Jianan <jnhuang95@gmail.com>
diff --git a/fs/erofs/decompress.h b/fs/erofs/decompress.h
index 81d5fb8..4752f77 100644
--- a/fs/erofs/decompress.h
+++ b/fs/erofs/decompress.h
@@ -14,6 +14,9 @@
 	unsigned int decodedskip;
 	unsigned int inputsize, decodedlength;
 
+	/* cut point of interlaced uncompressed data */
+	unsigned int interlaced_offset;
+
 	/* indicate the algorithm will be used for decompression */
 	unsigned int alg;
 	bool partial_decoding;