1990/0303/port/devmnt.c (diff list | history)

1990/0227/sys/src/9/port/devmnt.c:18,23 – 1990/0303/sys/src/9/port/devmnt.c:18,24 (short | long | prev | next)
1990/0227		{ Ref; /* for number of chans, incl. mntpt but not msg */ QLock; /* for access */
1990/0303		ulong mntid; /* serial # */
1990/0227		Chan *msg; /* for reading and writing messages */ Chan *mntpt; /* channel in user's name space */ };
1990/0227/sys/src/9/port/devmnt.c:50,55 – 1990/0303/sys/src/9/port/devmnt.c:51,62
1990/0227		Mnthdr *free; }mnthdralloc;
1990/0303		struct { Lock; long id; }mntid;
1990/0227		Mnt *mnt; void mntxmit(Mnt*, Mnthdr*);
1990/0227/sys/src/9/port/devmnt.c:119,137 – 1990/0303/sys/src/9/port/devmnt.c:126,142
1990/0227		mntdev(int dev, int noerr) { Mnt *m;
1990/0303		int i;
1990/0227		if(dev<0 || conf.nmntdev<=dev){ if(noerr) return 0; panic("mntdev out of range"); } m = &mnt[dev]; if(m->msg == 0){ if(noerr) return 0; error(0, Eshutdown); } return m;
1990/0303		for(m=mnt,i=0; i<conf.nmntdev; i++,m++) /* use a hash table some day */ if(m->mntid == dev){ if(m->msg == 0) break; return m; } if(noerr) return 0; error(0, Eshutdown);
1990/0227		} void
1990/0227/sys/src/9/port/devmnt.c:187,194 – 1990/0303/sys/src/9/port/devmnt.c:192,202
1990/0227		Found: m->ref = 1; unlock(m);
1990/0303		lock(&mntid); m->mntid = ++mntid.id; unlock(&mntid);
1990/0227		c = devattach('M', spec); c->dev = m - mnt;
1990/0303		c->dev = m->mntid;
1990/0227		m->mntpt = c; cm = bogus.chan; m->msg = cm;
1990/0227/sys/src/9/port/devmnt.c:205,210 – 1990/0303/sys/src/9/port/devmnt.c:213,220
1990/0227		strcpy(mh->thdr.aname, spec); mntxmit(m, mh); c->qid = mh->rhdr.qid;
1990/0303		c->mchan = m->msg; c->mqid = c->qid;
1990/0227		mhfree(mh); poperror(); return c;
1990/0227/sys/src/9/port/devmnt.c:243,248 – 1990/0303/sys/src/9/port/devmnt.c:253,260
1990/0227		nc->flag = c->flag; nc->offset = c->offset; nc->mnt = c->mnt;
1990/0303		nc->mchan = c->mchan; nc->mqid = c->qid;
1990/0227		if(new) poperror(); mhfree(mh);