static void rexmit_timer(ulong vp) { struct aoedev *d; struct frame *f, *e; struct sk_buff *sl; register long timeout; ulong flags, n; d = (struct aoedev *) vp; sl = NULL; /* timeout is always ~150% of the moving average */ timeout = d->rttavg; timeout += timeout >> 1; spin_lock_irqsave(&d->lock, flags); if (d->flags & DEVFL_TKILL) { spin_unlock_irqrestore(&d->lock, flags); return; } f = d->frames; e = f + d->nframes; for (; f<e; f++) { if (f->tag != FREETAG && tsince(f->tag) >= timeout) { n = f->waited += timeout; n /= HZ; if (n > aoe_deadsecs) { /* waited too long for response */ aoedev_downdev(d); break; } rexmit(d, f); } } if (d->flags & DEVFL_KICKME) { d->flags &= ~DEVFL_KICKME; aoecmd_work(d); } sl = d->sendq_hd; d->sendq_hd = d->sendq_tl = NULL; if (sl) { n = d->rttavg <<= 1; if (n > MAXTIMER) d->rttavg = MAXTIMER; } d->timer.expires = jiffies + TIMERTICK; add_timer(&d->timer); spin_unlock_irqrestore(&d->lock, flags); aoenet_xmit(sl); }
/* * Check all frames on device and resend any frames that have been * outstanding for 200% of the device round trip time average. */ static void aoesweepproc(void*) { ulong i, tx, timeout, nbc; vlong starttick; enum { Nms = 100, Nbcms = 30*1000, }; /* magic */ uchar *ea; Aoeata *a; Aoedev *d; Devlink *l; Frame *f, *e; nbc = Nbcms/Nms; loop: if(nbc-- == 0){ if(rediscover && !waserror()){ discover(0xffff, 0xff); poperror(); } nbc = Nbcms/Nms; } starttick = MACHP(0)->ticks; rlock(&devs); for(d = devs.d; d; d = d->next){ if(!canqlock(d)) continue; if(!UP(d)){ qunlock(d); continue; } tx = 0; f = d->frames; e = f + d->nframes; for (; f < e; f++){ if(f->tag == Tfree) continue; l = f->dl; timeout = l->rttavg << 1; i = tsince(f->tag); if(i < timeout) continue; if(d->nout == d->maxout){ if(d->maxout > 1) d->maxout--; d->lastwadj = MACHP(0)->ticks; } a = (Aoeata*)f->hdr; if(a->scnt > Dbcnt / Aoesectsz && ++f->nl->lostjumbo > (d->nframes << 1)){ ea = f->dl->eatab[f->eaidx]; eventlog("%æ: jumbo failure on %s:%E; lba%lld\n", d, f->nl->path, ea, f->lba); d->maxbcnt = Dbcnt; d->flag &= ~Djumbo; } resend(d, f); if(tx++ == 0){ if((l->rttavg <<= 1) > Rtmax) l->rttavg = Rtmax; eventlog("%æ: rtt %ldms\n", d, TK2MS(l->rttavg)); } } if(d->nout == d->maxout && d->maxout < d->nframes && TK2MS(MACHP(0)->ticks - d->lastwadj) > 10*1000){ /* more magic */ d->maxout++; d->lastwadj = MACHP(0)->ticks; } qunlock(d); } runlock(&devs); i = Nms - TK2MS(MACHP(0)->ticks - starttick); if(i > 0) tsleep(&up->sleep, return0, 0, i); goto loop; }