97 	__u32 blknum;  in main()  local
129 	blknum = 0;  in main()
130 	if (ioctl(fd, FIBMAP, &blknum) < 0) {  in main()
136 	ext.start_blk = blknum;  in main()
137 	ext.end_blk = blknum;  in main()
141 		blknum = i;  in main()
143 		if (ioctl(fd, FIBMAP, &blknum) < 0) {  in main()
149 		if ((blknum == 0 && blknum == ext.end_blk) || (ext.end_blk + 1) == blknum) {  in main()
150 			ext.end_blk = blknum;  in main()
155 			ext.start_blk = blknum;  in main()
156 			ext.end_blk = blknum;  in main()