[libvirt] [PATCH 06/40] Simplify the Xen get version driver method

[Daniel P. Berrange]

From: "Daniel P. Berrange" <berrange at redhat.com>

The hypervisor driver is mandatory, so the the call to
xenHypervisorGetVersion must always succeed. Thus there
is no need to ever run xenDaemonGetVersion

Signed-off-by: Daniel P. Berrange <berrange at redhat.com>
---
 src/xen/xen_driver.c     | 11 +----------
 src/xen/xen_driver.h     |  1 -
 src/xen/xen_hypervisor.c |  1 -
 src/xen/xend_internal.c  | 31 -------------------------------
 src/xen/xend_internal.h  |  1 -
 5 files changed, 1 insertion(+), 44 deletions(-)

diff --git a/src/xen/xen_driver.c b/src/xen/xen_driver.c
index 109a074..951f6e7 100644
--- a/src/xen/xen_driver.c
+++ b/src/xen/xen_driver.c
@@ -512,16 +512,7 @@ xenUnifiedConnectSupportsFeature(virConnectPtr conn ATTRIBUTE_UNUSED, int featur
 static int
 xenUnifiedConnectGetVersion(virConnectPtr conn, unsigned long *hvVer)
 {
-    xenUnifiedPrivatePtr priv = conn->privateData;
-    int i;
-
-    for (i = 0; i < XEN_UNIFIED_NR_DRIVERS; ++i)
-        if (priv->opened[i] &&
-            drivers[i]->xenVersion &&
-            drivers[i]->xenVersion(conn, hvVer) == 0)
-            return 0;
-
-    return -1;
+    return xenHypervisorGetVersion(conn, hvVer);
 }
 
 
diff --git a/src/xen/xen_driver.h b/src/xen/xen_driver.h
index 70c1226..803fee7 100644
--- a/src/xen/xen_driver.h
+++ b/src/xen/xen_driver.h
@@ -93,7 +93,6 @@ extern int xenRegister (void);
  * structure with direct calls in xen_unified.c.
  */
 struct xenUnifiedDriver {
-    virDrvConnectGetVersion  xenVersion;
     virDrvConnectGetHostname xenGetHostname;
     virDrvDomainSuspend xenDomainSuspend;
     virDrvDomainResume xenDomainResume;
diff --git a/src/xen/xen_hypervisor.c b/src/xen/xen_hypervisor.c
index 6b41898..012cb0e 100644
--- a/src/xen/xen_hypervisor.c
+++ b/src/xen/xen_hypervisor.c
@@ -880,7 +880,6 @@ typedef struct xen_op_v2_dom xen_op_v2_dom;
 static unsigned long long xenHypervisorGetMaxMemory(virDomainPtr domain);
 
 struct xenUnifiedDriver xenHypervisorDriver = {
-    .xenVersion = xenHypervisorGetVersion,
     .xenDomainSuspend = xenHypervisorPauseDomain,
     .xenDomainResume = xenHypervisorResumeDomain,
     .xenDomainDestroyFlags = xenHypervisorDestroyDomainFlags,
diff --git a/src/xen/xend_internal.c b/src/xen/xend_internal.c
index eb3e63e..eb11408 100644
--- a/src/xen/xend_internal.c
+++ b/src/xen/xend_internal.c
@@ -1861,36 +1861,6 @@ xenDaemonNodeGetTopology(virConnectPtr conn, virCapsPtr caps)
     return ret;
 }
 
-/**
- * xenDaemonGetVersion:
- * @conn: pointer to the Xen Daemon block
- * @hvVer: return value for the version of the running hypervisor (OUT)
- *
- * Get the version level of the Hypervisor running.
- *
- * Returns -1 in case of error, 0 otherwise. if the version can't be
- *    extracted by lack of capacities returns 0 and @hvVer is 0, otherwise
- *    @hvVer value is major * 1,000,000 + minor * 1,000 + release
- */
-int
-xenDaemonGetVersion(virConnectPtr conn, unsigned long *hvVer)
-{
-    struct sexpr *root;
-    int major, minor;
-    unsigned long version;
-
-    root = sexpr_get(conn, "/xend/node/");
-    if (root == NULL)
-        return -1;
-
-    major = sexpr_int(root, "node/xen_major");
-    minor = sexpr_int(root, "node/xen_minor");
-    sexpr_free(root);
-    version = major * 1000000 + minor * 1000;
-    *hvVer = version;
-    return 0;
-}
-
 
 /**
  * xenDaemonListDomains:
@@ -3652,7 +3622,6 @@ xenDaemonDomainBlockPeek(virDomainPtr domain,
 }
 
 struct xenUnifiedDriver xenDaemonDriver = {
-    .xenVersion = xenDaemonGetVersion,
     .xenDomainSuspend = xenDaemonDomainSuspend,
     .xenDomainResume = xenDaemonDomainResume,
     .xenDomainShutdown = xenDaemonDomainShutdown,
diff --git a/src/xen/xend_internal.h b/src/xen/xend_internal.h
index e5c0896..41d8341 100644
--- a/src/xen/xend_internal.h
+++ b/src/xen/xend_internal.h
@@ -98,7 +98,6 @@ xenDaemonDomainFetch(virConnectPtr xend,
 int xenDaemonOpen(virConnectPtr conn, virConnectAuthPtr auth,
                   unsigned int flags);
 int xenDaemonClose(virConnectPtr conn);
-int xenDaemonGetVersion(virConnectPtr conn, unsigned long *hvVer);
 int xenDaemonNodeGetInfo(virConnectPtr conn, virNodeInfoPtr info);
 int xenDaemonNodeGetTopology(virConnectPtr conn, virCapsPtr caps);
 int xenDaemonDomainSuspend(virDomainPtr domain);
-- 
1.8.1.4