Add virCapabilities*EmulatorRequired.

Certain drivers always need an 'emulator' specified in the XML (qemu and lxc
at least). Store this info in capabilities.

We will eventually use this to move default emulator handling out of
drivers and into domain_conf.*

ChangeLog

+Tue Jun 16 11:18:00 EDT 2009 Cole Robinson <crobinso@redhat.com>
+
+	* src/capabilities.c src/capabilities.h src/libvirt_private.syms
+	src/lxc_conf.c src/qemu_conf.c: Add virCapabilities*EmulatorRequired.
+
 Tue Jun 16 11:16:17 EDT 2009 Cole Robinson <crobinso@redhat.com>
 
 	* src/qemu_conf.c src/qemu_conf.h tests/qemuhelptest.c

src/capabilities.c

@@ -707,3 +707,13 @@ virCapabilitiesGenerateMac(virCapsPtr caps,
 {
     virGenerateMacAddr(caps->macPrefix, mac);
 }
+
+extern void
+virCapabilitiesSetEmulatorRequired(virCapsPtr caps) {
+    caps->emulatorRequired = 1;
+}
+
+extern unsigned int
+virCapabilitiesIsEmulatorRequired(virCapsPtr caps) {
+    return caps->emulatorRequired;
+}

src/capabilities.h

@@ -106,6 +106,7 @@ struct _virCaps {
     int nguests;
     virCapsGuestPtr *guests;
     unsigned char macPrefix[VIR_MAC_PREFIX_BUFLEN];
+    unsigned int emulatorRequired : 1;
 };
 
 
@@ -125,6 +126,12 @@ extern void
 virCapabilitiesGenerateMac(virCapsPtr caps,
                            unsigned char *mac);
 
+extern void
+virCapabilitiesSetEmulatorRequired(virCapsPtr caps);
+
+extern unsigned int
+virCapabilitiesIsEmulatorRequired(virCapsPtr caps);
+
 extern int
 virCapabilitiesAddHostFeature(virCapsPtr caps,
                               const char *name);

src/libvirt_private.syms

@@ -27,6 +27,8 @@ virCapabilitiesFree;
 virCapabilitiesNew;
 virCapabilitiesSetMacPrefix;
 virCapabilitiesGenerateMac;
+virCapabilitiesSetEmulatorRequired;
+virCapabilitiesIsEmulatorRequired;
 
 
 # conf.h

src/lxc_conf.c

@@ -69,6 +69,10 @@ virCapsPtr lxcCapsInit(void)
                                       0,
                                       NULL) == NULL)
         goto no_memory;
+
+    /* LXC Requires an emulator in the XML */
+    virCapabilitiesSetEmulatorRequired(caps);
+
     return caps;
 
 no_memory:

src/qemu_conf.c

@@ -405,6 +405,9 @@ virCapsPtr qemudCapsInit(void) {
             }
     }
 
+    /* QEMU Requires an emulator in the XML */
+    virCapabilitiesSetEmulatorRequired(caps);
+
     return caps;
 
  no_memory: