[libvirt] [PATCH v3 3/5] qemuMonitorJSONDelDevice: Return -2 on DeviceNotFound error

[Michal Privoznik]

A caller might be interested in differentiating the cause for
error, especially if DeviceNotFound error occurred.

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
ACKed-by: Peter Krempa <pkrempa at redhat.com>
---
 src/qemu/qemu_monitor.c      | 10 ++++++++++
 src/qemu/qemu_monitor_json.c |  5 +++++
 2 files changed, 15 insertions(+)

diff --git a/src/qemu/qemu_monitor.c b/src/qemu/qemu_monitor.c
index 8bd4d4d761..0eb7f60e38 100644
--- a/src/qemu/qemu_monitor.c
+++ b/src/qemu/qemu_monitor.c
@@ -3008,6 +3008,16 @@ qemuMonitorDriveDel(qemuMonitorPtr mon,
 }
 
 
+/**
+ * @mon: monitor object
+ * @devalias: alias of the device to detach
+ *
+ * Sends device detach request to qemu.
+ *
+ * Returns: 0 on success,
+ *         -2 if DeviceNotFound error encountered (error NOT reported)
+ *         -1 otherwise (error reported)
+ */
 int
 qemuMonitorDelDevice(qemuMonitorPtr mon,
                      const char *devalias)
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 0236323a51..5c16e1f3a1 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -4191,6 +4191,11 @@ int qemuMonitorJSONDelDevice(qemuMonitorPtr mon,
     if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
         goto cleanup;
 
+    if (qemuMonitorJSONHasError(reply, "DeviceNotFound")) {
+        ret = -2;
+        goto cleanup;
+    }
+
     if (qemuMonitorJSONCheckError(cmd, reply) < 0)
         goto cleanup;
 
-- 
2.19.2