1 files changed, 39 insertions, 20 deletions

diff --git a/net/smc/smc_tx.c b/net/smc/smc_tx.c
index be241d53020f..a96ce162825e 100644
--- a/net/smc/smc_tx.c
+++ b/net/smc/smc_tx.c
@@ -31,7 +31,6 @@
 #include "smc_tracepoint.h"
 
 #define SMC_TX_WORK_DELAY	0
-#define SMC_TX_CORK_DELAY	(HZ >> 2)	/* 250 ms */
 
 /***************************** sndbuf producer *******************************/
 
@@ -236,16 +235,15 @@ int smc_tx_sendmsg(struct smc_sock *smc, struct msghdr *msg, size_t len)
 		 */
 		if ((msg->msg_flags & MSG_OOB) && !send_remaining)
 			conn->urg_tx_pend = true;
-		if ((msg->msg_flags & MSG_MORE || smc_tx_is_corked(smc)) &&
-		    (atomic_read(&conn->sndbuf_space) >
-						(conn->sndbuf_desc->len >> 1)))
-			/* for a corked socket defer the RDMA writes if there
-			 * is still sufficient sndbuf_space available
+		if ((msg->msg_flags & MSG_MORE || smc_tx_is_corked(smc) ||
+		     msg->msg_flags & MSG_SENDPAGE_NOTLAST) &&
+		    (atomic_read(&conn->sndbuf_space)))
+			/* for a corked socket defer the RDMA writes if
+			 * sndbuf_space is still available. The applications
+			 * should known how/when to uncork it.
 			 */
-			queue_delayed_work(conn->lgr->tx_wq, &conn->tx_work,
-					   SMC_TX_CORK_DELAY);
-		else
-			smc_tx_sndbuf_nonempty(conn);
+			continue;
+		smc_tx_sndbuf_nonempty(conn);
 
 		trace_smc_tx_sendmsg(smc, copylen);
 	} /* while (msg_data_left(msg)) */
@@ -260,6 +258,22 @@ out_err:
 	return rc;
 }
 
+int smc_tx_sendpage(struct smc_sock *smc, struct page *page, int offset,
+		    size_t size, int flags)
+{
+	struct msghdr msg = {.msg_flags = flags};
+	char *kaddr = kmap(page);
+	struct kvec iov;
+	int rc;
+
+	iov.iov_base = kaddr + offset;
+	iov.iov_len = size;
+	iov_iter_kvec(&msg.msg_iter, WRITE, &iov, 1, size);
+	rc = smc_tx_sendmsg(smc, &msg, size);
+	kunmap(page);
+	return rc;
+}
+
 /***************************** sndbuf consumer *******************************/
 
 /* sndbuf consumer: actual data transfer of one target chunk with ISM write */
@@ -597,27 +611,32 @@ int smc_tx_sndbuf_nonempty(struct smc_connection *conn)
 	return rc;
 }
 
-/* Wakeup sndbuf consumers from process context
- * since there is more data to transmit
- */
-void smc_tx_work(struct work_struct *work)
+void smc_tx_pending(struct smc_connection *conn)
 {
-	struct smc_connection *conn = container_of(to_delayed_work(work),
-						   struct smc_connection,
-						   tx_work);
 	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);
 	int rc;
 
-	lock_sock(&smc->sk);
 	if (smc->sk.sk_err)
-		goto out;
+		return;
 
 	rc = smc_tx_sndbuf_nonempty(conn);
 	if (!rc && conn->local_rx_ctrl.prod_flags.write_blocked &&
 	    !atomic_read(&conn->bytes_to_rcv))
 		conn->local_rx_ctrl.prod_flags.write_blocked = 0;
+}
+
+/* Wakeup sndbuf consumers from process context
+ * since there is more data to transmit
+ */
+void smc_tx_work(struct work_struct *work)
+{
+	struct smc_connection *conn = container_of(to_delayed_work(work),
+						   struct smc_connection,
+						   tx_work);
+	struct smc_sock *smc = container_of(conn, struct smc_sock, conn);
 
-out:
+	lock_sock(&smc->sk);
+	smc_tx_pending(conn);
 	release_sock(&smc->sk);
 }