80 		struct address_space *cache_mapping, u64 index, int length,  in squashfs_bio_read_cached()  argument
104 		 * Compare these to the original required index and length to  in squashfs_bio_read_cached()
111 		else if (idx == page_count - 1 && index + length != read_end)  in squashfs_bio_read_cached()
189 static int squashfs_bio_read(struct super_block *sb, u64 index, int length,  in squashfs_bio_read()  argument
196 	const u64 read_end = round_up(index + length, msblk->devblksize);  in squashfs_bio_read()
236 						 length, read_start, read_end,  in squashfs_bio_read()
255  * Read and decompress a metadata block or datablock.  Length is non-zero
257  * filesystem), otherwise the length is obtained from the first two bytes of
258  * the metadata block.  A bit in the length field indicates if the block
263 int squashfs_read_data(struct super_block *sb, u64 index, int length,  in squashfs_read_data()  argument
272 	if (length) {  in squashfs_read_data()
276 		compressed = SQUASHFS_COMPRESSED_BLOCK(length);  in squashfs_read_data()
277 		length = SQUASHFS_COMPRESSED_SIZE_BLOCK(length);  in squashfs_read_data()
279 			index, compressed ? "" : "un", length, output->length);  in squashfs_read_data()
300 		/* Extract the length of the metadata block */  in squashfs_read_data()
302 		length = data[offset];  in squashfs_read_data()
304 			length |= data[offset + 1] << 8;  in squashfs_read_data()
311 			length |= data[0] << 8;  in squashfs_read_data()
317 		compressed = SQUASHFS_COMPRESSED(length);  in squashfs_read_data()
318 		length = SQUASHFS_COMPRESSED_SIZE(length);  in squashfs_read_data()
322 		      compressed ? "" : "un", length);  in squashfs_read_data()
324 	if (length <= 0 || length > output->length ||  in squashfs_read_data()
325 			(index + length) > msblk->bytes_used) {  in squashfs_read_data()
331 		*next_index = index + length;  in squashfs_read_data()
333 	res = squashfs_bio_read(sb, index, length, &bio, &offset);  in squashfs_read_data()
342 		res = msblk->thread_ops->decompress(msblk, bio, offset, length, output);  in squashfs_read_data()
344 		res = copy_bio_to_actor(bio, output, offset, length);  in squashfs_read_data()