76 static int squashfs_bio_read(struct super_block *sb, u64 index, int length,  in squashfs_bio_read()  argument
82 	const u64 read_end = round_up(index + length, msblk->devblksize);  in squashfs_bio_read()
134  * Read and decompress a metadata block or datablock.  Length is non-zero
136  * filesystem), otherwise the length is obtained from the first two bytes of
137  * the metadata block.  A bit in the length field indicates if the block
142 int squashfs_read_data(struct super_block *sb, u64 index, int length,  in squashfs_read_data()  argument
151 	if (length) {  in squashfs_read_data()
155 		compressed = SQUASHFS_COMPRESSED_BLOCK(length);  in squashfs_read_data()
156 		length = SQUASHFS_COMPRESSED_SIZE_BLOCK(length);  in squashfs_read_data()
158 			index, compressed ? "" : "un", length, output->length);  in squashfs_read_data()
179 		/* Extract the length of the metadata block */  in squashfs_read_data()
181 		length = data[offset];  in squashfs_read_data()
183 			length |= data[offset + 1] << 8;  in squashfs_read_data()
190 			length |= data[0] << 8;  in squashfs_read_data()
195 		compressed = SQUASHFS_COMPRESSED(length);  in squashfs_read_data()
196 		length = SQUASHFS_COMPRESSED_SIZE(length);  in squashfs_read_data()
200 		      compressed ? "" : "un", length);  in squashfs_read_data()
202 	if (length < 0 || length > output->length ||  in squashfs_read_data()
203 			(index + length) > msblk->bytes_used) {  in squashfs_read_data()
209 		*next_index = index + length;  in squashfs_read_data()
211 	res = squashfs_bio_read(sb, index, length, &bio, &offset);  in squashfs_read_data()
220 		res = squashfs_decompress(msblk, bio, offset, length, output);  in squashfs_read_data()
222 		res = copy_bio_to_actor(bio, output, offset, length);  in squashfs_read_data()