static int32_t
fsread(Usbfs*_1, Fid *fid, void *data, int32_t cnt, int64_t off)
{
int qd;
int rc;
Dev *dev;
Qid q;
int32_t (*xfsread)(Usbfs *fs, Fid *f, void *data, int32_t count,
int64_t );
q = fid->qid;
qd = qiddev(q.path);
if(qd == Dtop)
return usbdirread(nil, q, data, cnt, off, dirgen, nil);
qlock(&fslck);
if(fs[qd] == nil){
qunlock(&fslck);
werrstr(Eio);
return -1;
}
dev = fs[qd]->dev;
if(dev != nil)
incref(&dev->Ref);
xfsread = fs[qd]->read;
qunlock(&fslck);
rc = xfsread(fs[qd], fid, data, cnt, off);
if(dev != nil)
closedev(dev);
return rc;
}
static int32_t
fsread(Usbfs *fs, Fid *fid, void *data, int32_t count, int64_t offset)
{
int cn, qt;
char *s, *se;
char buf[2048]; /* keep this large for ifstats */
Buf *bp;
Conn *c;
Ether *e;
Qid q;
q = fid->qid;
q.path &= ~fs->qid;
e = fs->aux;
s = buf;
se = buf+sizeof(buf);
qt = qtype(q.path);
cn = qnum(q.path);
switch(qt){
case Qroot:
count = usbdirread(fs, q, data, count, offset, rootdirgen, nil);
break;
case Qaddr:
s = seprintaddr(s, se, e->addr);
count = usbreadbuf(data, count, offset, buf, s - buf);
break;
case Qnifstats:
/* BUG */
case Qifstats:
s = seprintifstats(s, se, e);
if(e->seprintstats != nil)
s = e->seprintstats(s, se, e);
count = usbreadbuf(data, count, offset, buf, s - buf);
break;
case Qnstats:
/* BUG */
case Qstats:
s = seprintstats(s, se, e);
count = usbreadbuf(data, count, offset, buf, s - buf);
break;
case Qndir:
count = usbdirread(fs, q, data, count, offset, conndirgen, nil);
break;
case Qndata:
c = getconn(e, cn, 0);
if(c == nil){
werrstr(Eio);
return -1;
}
bp = recvp(c->rc);
if(bp == nil)
return -1;
if(etherdebug > 1)
dumpframe("etherin", bp->rp, bp->ndata);
count = usbreadbuf(data, count, 0LL, bp->rp, bp->ndata);
freebuf(e, bp);
break;
case Qnctl:
s = seprint(s, se, "%11d ", cn);
count = usbreadbuf(data, count, offset, buf, s - buf);
break;
case Qntype:
c = getconn(e, cn, 0);
if(c == nil)
s = seprint(s, se, "%11d ", 0);
else
s = seprint(s, se, "%11d ", c->type);
count = usbreadbuf(data, count, offset, buf, s - buf);
break;
default:
sysfatal("usb: ether: fsread bug");
}
return count;
}
