ref: 6c9c2beb6e54a2ced1466615452e338d9bb7d48d dir: /sys/src/cmd/dossrv/dosfs.h/
enum { Maxfdata = IOUNIT, Maxiosize = IOHDRSZ+Maxfdata, }; extern Fcall *req; extern Fcall *rep; extern char repdata[Maxfdata]; extern uchar statbuf[STATMAX];