user_args::~user_args () {
if (args) xdr_delete (prog->tbl[procno].xdr_arg, args);
}
void
chord::dispatch (ptr<asrv> s, svccb *sbp)
{
if (!sbp) {
s->setcb (NULL);
return;
}
(*nrcv)++;
dorpc_arg *arg = sbp->Xtmpl getarg<dorpc_arg> ();
switch (sbp->proc ()) {
case TRANSPORTPROC_NULL:
sbp->reply (NULL);
break;
case TRANSPORTPROC_DORPC:
{
chordID v = make_chordID (arg->dest);
vnode *vnodep = vnodes[v];
if (!vnodep) {
trace << "unknown vnode " << v << " for procedure "
<< sbp->proc ()
<< " (" << arg->progno << "." << arg->procno << ").\n";
sbp->replyref (rpcstat (DORPC_UNKNOWNNODE));
return;
}
//find the program
const rpc_program *prog = get_program (arg->progno);
if (!prog) {
sbp->replyref (rpcstat (DORPC_NOHANDLER));
return;
}
//unmarshall the args
char *arg_base = (char *)(arg->args.base ());
int arg_len = arg->args.size ();
xdrmem x (arg_base, arg_len, XDR_DECODE);
xdrproc_t proc = prog->tbl[arg->procno].xdr_arg;
assert (proc);
void *unmarshalled_args = prog->tbl[arg->procno].alloc_arg ();
if (!proc (x.xdrp (), unmarshalled_args)) {
warn << "dispatch: error unmarshalling arguments: "
<< arg->progno << "." << arg->procno
<< " from " << v <<"\n";
xdr_delete (prog->tbl[arg->procno].xdr_arg, unmarshalled_args);
sbp->replyref (rpcstat (DORPC_MARSHALLERR));
return;
}
//call the handler
user_args *ua = New user_args (sbp, unmarshalled_args,
prog, arg->procno, arg->send_time);
vnodep->fill_user_args (ua);
if (!vnodep->progHandled (arg->progno)) {
trace << "dispatch to vnode " << v << " doesn't handle "
<< arg->progno << "." << arg->procno << "\n";
ua->replyref (chordstat (CHORD_NOHANDLER));
} else {
cbdispatch_t dispatch = vnodep->getHandler(arg->progno);
(dispatch)(ua);
}
}
break;
default:
warn << "Transport procedure " << sbp->proc () << " not handled\n";
}
}