linux-kernel - [PATCH 10/18] xen/pvcalls: implement listen command

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Message-Id: <1494880570-14209-10-git-send-email-sstabellini@kernel.org>
Date:   Mon, 15 May 2017 13:36:02 -0700
From:   Stefano Stabellini <sstabellini@...nel.org>
To:     xen-devel@...ts.xen.org
Cc:     linux-kernel@...r.kernel.org, sstabellini@...nel.org,
        jgross@...e.com, boris.ostrovsky@...cle.com,
        Stefano Stabellini <stefano@...reto.com>
Subject: [PATCH 10/18] xen/pvcalls: implement listen command

Call inet_listen to implement the listen command.

Signed-off-by: Stefano Stabellini <stefano@...reto.com>
CC: boris.ostrovsky@...cle.com
CC: jgross@...e.com
---
 drivers/xen/pvcalls-back.c | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/xen/pvcalls-back.c b/drivers/xen/pvcalls-back.c
index ff4634d..a762877 100644
--- a/drivers/xen/pvcalls-back.c
+++ b/drivers/xen/pvcalls-back.c
@@ -345,7 +345,28 @@ static int pvcalls_back_bind(struct xenbus_device *dev,
 static int pvcalls_back_listen(struct xenbus_device *dev,
 			       struct xen_pvcalls_request *req)
 {
-	return 0;
+	struct pvcalls_back_priv *priv;
+	int ret = -EINVAL;
+	struct sockpass_mapping *map;
+	struct xen_pvcalls_response *rsp;
+
+	if (dev == NULL)
+		return 0;
+	priv = dev_get_drvdata(&dev->dev);
+
+	map = radix_tree_lookup(&priv->socketpass_mappings, req->u.listen.id);
+	if (map == NULL)
+		goto out;
+
+	ret = inet_listen(map->sock, req->u.listen.backlog);
+
+out:
+	rsp = RING_GET_RESPONSE(&priv->ring, priv->ring.rsp_prod_pvt++);
+	rsp->req_id = req->req_id;
+	rsp->cmd = req->cmd;
+	rsp->u.listen.id = req->u.listen.id;
+	rsp->ret = ret;
+	return 1;
 }
 
 static int pvcalls_back_accept(struct xenbus_device *dev,
-- 
1.9.1