[PATCH] libxl: Implement domainGetMessages API

[Jim Fehlig]

Since commit 46783e6307a, the 'virsh dominfo' command calls
virDomainGetMessages to report any messages from the domain.
Hypervisors not implementing the API now get the following
log message when clients invoke 'virsh dominfo'

this function is not supported by the connection driver: virDomainGetMessages

Although libxl currently does not support any tainting or
deprecation messages, provide an implementation to squelch
the previously unseen error message when collecting dominfo.

Signed-off-by: Jim Fehlig <jfehlig at suse.com>
---
 src/libxl/libxl_driver.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c
index bc8598ea96..2d9385654c 100644
--- a/src/libxl/libxl_driver.c
+++ b/src/libxl/libxl_driver.c
@@ -6385,6 +6385,29 @@ libxlDomainGetMetadata(virDomainPtr dom,
     return ret;
 }
 
+static int
+libxlDomainGetMessages(virDomainPtr dom,
+                      char ***msgs,
+                      unsigned int flags)
+{
+    virDomainObj *vm = NULL;
+    int ret = -1;
+
+    virCheckFlags(0, -1);
+
+    if (!(vm = libxlDomObjFromDomain(dom)))
+        return -1;
+
+    if (virDomainGetMessagesEnsureACL(dom->conn, vm->def) < 0)
+        goto cleanup;
+
+    ret = virDomainObjGetMessages(vm, msgs, flags);
+
+ cleanup:
+    virDomainObjEndAPI(&vm);
+    return ret;
+}
+
 static virHypervisorDriver libxlHypervisorDriver = {
     .name = LIBXL_DRIVER_EXTERNAL_NAME,
     .connectURIProbe = libxlConnectURIProbe,
@@ -6498,6 +6521,7 @@ static virHypervisorDriver libxlHypervisorDriver = {
     .connectBaselineCPU = libxlConnectBaselineCPU, /* 2.3.0 */
     .domainSetMetadata = libxlDomainSetMetadata, /* 5.7.0 */
     .domainGetMetadata = libxlDomainGetMetadata, /* 5.7.0 */
+    .domainGetMessages = libxlDomainGetMessages, /* 8.0.0 */
 
 };
 
-- 
2.34.1