[Qemu-devel] [PATCH] qapi: InitSocketAddress: add keepalive option

[Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>]

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---

Hi all!

This is a continuation of "[PATCH v2 0/2] nbd: enable keepalive", but
it's a try from another side, so almost nothing common with v2.


 qapi/sockets.json   |  5 ++++-
 util/qemu-sockets.c | 13 +++++++++++++
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/qapi/sockets.json b/qapi/sockets.json
index fc81d8d5e8..aefa024051 100644
--- a/qapi/sockets.json
+++ b/qapi/sockets.json
@@ -53,6 +53,8 @@
 #
 # @ipv6: whether to accept IPv6 addresses, default try both IPv4 and IPv6
 #
+# @keepalive: enable keepalive when connecting to this socket (Since 4.1)
+#
 # Since: 1.3
 ##
 { 'struct': 'InetSocketAddress',
@@ -61,7 +63,8 @@
     '*numeric':  'bool',
     '*to': 'uint16',
     '*ipv4': 'bool',
-    '*ipv6': 'bool' } }
+    '*ipv6': 'bool',
+    '*keepalive': 'bool' } }
 
 ##
 # @UnixSocketAddress:
diff --git a/util/qemu-sockets.c b/util/qemu-sockets.c
index 8850a280a8..d2cd2a9d4f 100644
--- a/util/qemu-sockets.c
+++ b/util/qemu-sockets.c
@@ -457,6 +457,19 @@ int inet_connect_saddr(InetSocketAddress *saddr, Error **errp)
     }
 
     freeaddrinfo(res);
+
+    if (saddr->keepalive) {
+        int val = 1;
+        int ret = qemu_setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE,
+                                  &val, sizeof(val));
+
+        if (ret < 0) {
+            error_setg_errno(errp, errno, "Unable to set KEEPALIVE");
+            close(sock);
+            return -1;
+        }
+    }
+
     return sock;
 }
 
-- 
2.18.0