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xen: reduce callback special cases

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The callback struct is great when iterating through several
possibilities, but when calling a known callback, it's just
overhead.  We can make the direct call in those cases.

* src/xen/xen_driver.c (xenUnifiedOpen, xenUnifiedDomainSuspend)
(xenUnifiedDomainResume, xenUnifiedDomainDestroyFlags): Make
direct calls instead of going through callback.
This commit is contained in:
Eric Blake 2011-07-21 14:26:47 -06:00
parent f859919fed
commit 03e5f8bbbf
1 changed files with 8 additions and 17 deletions
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25
src/xen/xen_driver.c
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@ -351,8 +351,7 @@ xenUnifiedOpen (virConnectPtr conn, virConnectAuthPtr auth, unsigned int flags)
/* Hypervisor is only run with privilege & required to succeed */
if (xenHavePrivilege()) {
VIR_DEBUG("Trying hypervisor sub-driver");
if (drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->xenOpen(conn, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
if (xenHypervisorOpen(conn, auth, flags) == VIR_DRV_OPEN_SUCCESS) {
VIR_DEBUG("Activated hypervisor sub-driver");
priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] = 1;
}
@ -360,8 +359,7 @@ xenUnifiedOpen (virConnectPtr conn, virConnectAuthPtr auth, unsigned int flags)
/* XenD is required to succeed if privileged */
VIR_DEBUG("Trying XenD sub-driver");
if (drivers[XEN_UNIFIED_XEND_OFFSET]->xenOpen(conn, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
if (xenDaemonOpen(conn, auth, flags) == VIR_DRV_OPEN_SUCCESS) {
VIR_DEBUG("Activated XenD sub-driver");
priv->opened[XEN_UNIFIED_XEND_OFFSET] = 1;
@ -369,15 +367,13 @@ xenUnifiedOpen (virConnectPtr conn, virConnectAuthPtr auth, unsigned int flags)
* succeed if root, optional otherwise */
if (priv->xendConfigVersion <= 2) {
VIR_DEBUG("Trying XM sub-driver");
if (drivers[XEN_UNIFIED_XM_OFFSET]->xenOpen(conn, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
if (xenXMOpen(conn, auth, flags) == VIR_DRV_OPEN_SUCCESS) {
VIR_DEBUG("Activated XM sub-driver");
priv->opened[XEN_UNIFIED_XM_OFFSET] = 1;
}
}
VIR_DEBUG("Trying XS sub-driver");
if (drivers[XEN_UNIFIED_XS_OFFSET]->xenOpen(conn, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
if (xenStoreOpen(conn, auth, flags) == VIR_DRV_OPEN_SUCCESS) {
VIR_DEBUG("Activated XS sub-driver");
priv->opened[XEN_UNIFIED_XS_OFFSET] = 1;
} else {
@ -404,8 +400,7 @@ xenUnifiedOpen (virConnectPtr conn, virConnectAuthPtr auth, unsigned int flags)
#if WITH_XEN_INOTIFY
if (xenHavePrivilege()) {
VIR_DEBUG("Trying Xen inotify sub-driver");
if (drivers[XEN_UNIFIED_INOTIFY_OFFSET]->xenOpen(conn, auth, flags) ==
VIR_DRV_OPEN_SUCCESS) {
if (xenInotifyOpen(conn, auth, flags) == VIR_DRV_OPEN_SUCCESS) {
VIR_DEBUG("Activated Xen inotify sub-driver");
priv->opened[XEN_UNIFIED_INOTIFY_OFFSET] = 1;
}
@ -840,8 +835,7 @@ xenUnifiedDomainSuspend (virDomainPtr dom)
return 0;
if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->xenDomainSuspend &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->xenDomainSuspend (dom) == 0)
xenHypervisorPauseDomain(dom) == 0)
return 0;
return -1;
@ -864,8 +858,7 @@ xenUnifiedDomainResume (virDomainPtr dom)
return 0;
if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->xenDomainResume &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->xenDomainResume (dom) == 0)
xenHypervisorResumeDomain(dom) == 0)
return 0;
return -1;
@ -921,9 +914,7 @@ xenUnifiedDomainDestroyFlags(virDomainPtr dom,
return 0;
if (priv->opened[XEN_UNIFIED_HYPERVISOR_OFFSET] &&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->xenDomainDestroyFlags&&
drivers[XEN_UNIFIED_HYPERVISOR_OFFSET]->xenDomainDestroyFlags(dom,
flags) == 0)
xenHypervisorDestroyDomainFlags(dom, flags) == 0)
return 0;
return -1;