+ return len;
+ error:
+ if (len == -EAGAIN) {
+ dprintk("RPC: TCP recv_record got EAGAIN\n");
+ svc_xprt_received(&svsk->sk_xprt);
+ }
+ return len;
+ err_delete:
+ set_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags);
+ err_again:
+ return -EAGAIN;
+}
+
+static int svc_process_calldir(struct svc_sock *svsk, struct svc_rqst *rqstp,
+ struct rpc_rqst **reqpp, struct kvec *vec)
+{
+ struct rpc_rqst *req = NULL;
+ u32 *p;
+ u32 xid;
+ u32 calldir;
+ int len;
+
+ len = svc_recvfrom(rqstp, vec, 1, 8);
+ if (len < 0)
+ goto error;
+
+ p = (u32 *)rqstp->rq_arg.head[0].iov_base;
+ xid = *p++;
+ calldir = *p;
+
+ if (calldir == 0) {
+ /* REQUEST is the most common case */
+ vec[0] = rqstp->rq_arg.head[0];
+ } else {
+ /* REPLY */
+ if (svsk->sk_bc_xprt)
+ req = xprt_lookup_rqst(svsk->sk_bc_xprt, xid);
+
+ if (!req) {
+ printk(KERN_NOTICE
+ "%s: Got unrecognized reply: "
+ "calldir 0x%x sk_bc_xprt %p xid %08x\n",
+ __func__, ntohl(calldir),
+ svsk->sk_bc_xprt, xid);
+ vec[0] = rqstp->rq_arg.head[0];
+ goto out;
+ }
+
+ memcpy(&req->rq_private_buf, &req->rq_rcv_buf,
+ sizeof(struct xdr_buf));
+ /* copy the xid and call direction */
+ memcpy(req->rq_private_buf.head[0].iov_base,
+ rqstp->rq_arg.head[0].iov_base, 8);
+ vec[0] = req->rq_private_buf.head[0];
+ }
+ out:
+ vec[0].iov_base += 8;
+ vec[0].iov_len -= 8;
+ len = svsk->sk_reclen - 8;
+ error:
+ *reqpp = req;
+ return len;
+}
+
+/*
+ * Receive data from a TCP socket.
+ */
+static int svc_tcp_recvfrom(struct svc_rqst *rqstp)
+{
+ struct svc_sock *svsk =
+ container_of(rqstp->rq_xprt, struct svc_sock, sk_xprt);
+ struct svc_serv *serv = svsk->sk_xprt.xpt_server;
+ int len;
+ struct kvec *vec;
+ int pnum, vlen;
+ struct rpc_rqst *req = NULL;
+
+ dprintk("svc: tcp_recv %p data %d conn %d close %d\n",
+ svsk, test_bit(XPT_DATA, &svsk->sk_xprt.xpt_flags),
+ test_bit(XPT_CONN, &svsk->sk_xprt.xpt_flags),
+ test_bit(XPT_CLOSE, &svsk->sk_xprt.xpt_flags));
+
+ len = svc_tcp_recv_record(svsk, rqstp);
+ if (len < 0)
+ goto error;
+