ref: d9d2925fa024c2eceeea18c9b3afda30af96301e
dir: /sys/src/cmd/ip/snoopy/aoeata.c/
#include <u.h> #include <libc.h> #include <ip.h> #include "dat.h" #include "protos.h" typedef struct{ uchar aflag; uchar feat; uchar sectors; uchar cmd; uchar lba[6]; }Hdr; enum{ Hsize = 10, }; enum{ Oaflag, Ocmd, Ofeat, Osectors, Olba, Ostat, Oerr, }; static Field p_fields[] = { {"aflag", Fnum, Oaflag, "aflag", }, {"cmd", Fnum, Ocmd, "command register", }, {"feat", Fnum, Ofeat, "features", }, {"sectors", Fnum, Osectors, "number of sectors", }, {"lba", Fnum, Olba, "lba", }, {"stat", Fnum, Ostat, "status", }, {"err", Fnum, Oerr, "error", }, {0} }; static void p_compile(Filter *f) { if(f->op == '='){ compile_cmp(aoeata.name, f, p_fields); return; } sysfatal("unknown aoeata field: %s", f->s); } uvlong llba(uchar *c) { uvlong l; l = c[0]; l |= c[1]<<8; l |= c[2]<<16; l |= c[3]<<24; l |= (uvlong)c[4]<<32; l |= (uvlong)c[5]<<40; return l; } static int p_filter(Filter *f, Msg *m) { Hdr *h; if(m->pe - m->ps < Hsize) return 0; h = (Hdr*)m->ps; m->ps += Hsize; switch(f->subop){ case Oaflag: return h->aflag == f->ulv; case Ocmd: return h->cmd == f->ulv; case Ofeat: return h->feat == f->ulv; case Osectors: return h->sectors == f->ulv; case Olba: return llba(h->lba) == f->vlv; /* this is wrong, but we don't have access to the direction here */ case Ostat: return h->cmd == f->ulv; case Oerr: return h->feat == f->ulv; } return 0; } static int p_seprint(Msg *m) { Hdr *h; if(m->pe - m->ps < Hsize) return 0; h = (Hdr*)m->ps; m->ps += Hsize; /* no next protocol */ m->pr = nil; m->p = seprint(m->p, m->e, "aflag=%ux errfeat=%ux sectors=%ux cmdstat=%ux lba=%lld", h->aflag, h->feat, h->sectors, h->cmd, llba(h->lba)); return 0; } Proto aoeata = { "aoeata", p_compile, p_filter, p_seprint, nil, nil, p_fields, defaultframer, };