ref: 3debe91f3d1dd8a49ec2de5927e46e28ae9e7aad dir: /sys/src/cmd/dossrv/dosfs.h/
enum { Maxfdata = 8192, Maxiosize = IOHDRSZ+Maxfdata, }; extern Fcall *req; extern Fcall *rep; extern char repdata[Maxfdata]; extern uchar statbuf[STATMAX];