22  * ntfs_compression_constants - enum of constants used in the compression code
30 	/* Compression sub-block constants. */
36 	 * The maximum compression block size is by definition 16 * the cluster
38 	 * maximum compression buffer size is 64kiB, so we use this when
39 	 * initializing the compression buffer.
115  * ntfs_decompress - decompress a compression block into an array of pages
124  * @cb_start:		compression block to decompress (IN)
125  * @cb_size:		size of compression block @cb_start in bytes (IN)
132  * This decompresses the compression block @cb_start into the array of
139  * @cb_start is a pointer to the compression block which needs decompressing
144  * completed during the decompression of the compression block (@cb_start).
150  * the compression block @cb_start as it is a per-CPU buffer.
159 	 * Pointers into the compressed data, i.e. the compression block (cb),  in ntfs_decompress()
190 	 * Have we reached the end of the compression block or the end of the  in ntfs_decompress()
192 	 * position in the compression block is one byte before its end so the  in ntfs_decompress()
429  * @page:	locked page in the compression block(s) we need to read
434  * 1. Determine which compression block(s) @page is in.
435  * 2. Get hold of all pages corresponding to this/these compression block(s).
436  * 3. Read the (first) compression block.
438  * 5. Throw the compressed data away and proceed to 3. for the next compression
439  *    block or return success if no more compression blocks left.
458  * nature of the compression algorithm used. Just in case we check and output
489 	/* Number of compression blocks (cbs) in the wanted vcn range. */  in ntfs_read_compressed_block()
494 	 * compression blocks (cbs) overlapping @page. Due to alignment  in ntfs_read_compressed_block()
585 	 * Now read the first compression block.  in ntfs_read_compressed_block()
694 	 * Get the compression buffer. We must not sleep any more  in ntfs_read_compressed_block()
719 	ntfs_debug("Successfully read the compression block.");  in ntfs_read_compressed_block()
726 	/* Catch end of file inside a compression block. */  in ntfs_read_compressed_block()
732 		ntfs_debug("Found sparse compression block.");  in ntfs_read_compressed_block()
779 		ntfs_debug("Found uncompressed compression block.");  in ntfs_read_compressed_block()
844 		ntfs_debug("Found compressed compression block.");  in ntfs_read_compressed_block()
856 					"this compression block.",  in ntfs_read_compressed_block()
922 			"compression block.");  in ntfs_read_compressed_block()
928 			"compression block.");  in ntfs_read_compressed_block()
933 	ntfs_error(vol->sb, "getblk() failed. Cannot read compression block.");  in ntfs_read_compressed_block()