Plan 9 from Bell Labs’s /usr/web/sources/plan9/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];