Fix starting of xen domains without a PVFB console by removing default emulator

ChangeLog

-Thu Sep  5 12:33:26 BST 2008 Daniel P. Berrange <berrange@redhat.com>
+Fri Sep  5 12:50:26 BST 2008 Daniel P. Berrange <berrange@redhat.com>
+
+	Fix starting of Xen domains without PVFB console, by not
+	setting emulator path in SEXPR unless asked for
+	* src/domain_conf.c, src/domain_conf.h, src/xm_internal.c: Don't
+	set emulator path with a default value
+	* src/lxc_driver.c, src/qemu_conf.c, src/qemu_driver.c: Find a
+	default emulator path if no explicit path is provided in config
+	* tests/xmconfigdata/test-paravirt-net-e1000.xml,
+	tests/xmconfigdata/test-paravirt-new-pvfb.xml,
+	tests/xmconfigdata/test-paravirt-old-pvfb.xml,
+	tests/xml2sexprdata/xml2sexpr-fv-kernel.xml: Remove default
+	emulator path
+	* tests/xml2sexprdata/xml2sexpr-pv-vfb-new.sexpr: Remove
+	emulator path
+
+Fri Sep  5 12:33:26 BST 2008 Daniel P. Berrange <berrange@redhat.com>
 
 	* src/xen_unified.c, src/xen_internal.c, src/xen_internal.h,
 	tests/xencapstest.c: Pass connection object into capabilities

src/domain_conf.c

@@ -1917,24 +1917,6 @@ static virDomainDefPtr virDomainDefParseXML(virConnectPtr conn,
     }
 
     def->emulator = virXPathString(conn, "string(./devices/emulator[1])", ctxt);
-    if (!def->emulator) {
-        const char *type = virDomainVirtTypeToString(def->virtType);
-        if (!type) {
-            virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR,
-                                 "%s", _("unknown virt type"));
-            goto error;
-        }
-        const char *emulator = virCapabilitiesDefaultGuestEmulator(caps,
-                                                                   def->os.type,
-                                                                   def->os.arch,
-                                                                   type);
-
-        if (emulator &&
-            !(def->emulator = strdup(emulator))) {
-            virDomainReportError(conn, VIR_ERR_NO_MEMORY, NULL);
-            goto error;
-        }
-    }
 
     /* analysis of the disk devices */
     if ((n = virXPathNodeSet(conn, "./devices/disk", ctxt, &nodes)) < 0) {
@@ -3449,4 +3431,33 @@ int virDiskNameToBusDeviceIndex(virDomainDiskDefPtr disk,
     return 0;
 }
 
+const char *virDomainDefDefaultEmulator(virConnectPtr conn,
+                                        virDomainDefPtr def,
+                                        virCapsPtr caps) {
+    const char *type;
+    const char *emulator;
+
+    type = virDomainVirtTypeToString(def->virtType);
+    if (!type) {
+        virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR,
+                             "%s", _("unknown virt type"));
+        return NULL;
+    }
+
+    emulator = virCapabilitiesDefaultGuestEmulator(caps,
+                                                   def->os.type,
+                                                   def->os.arch,
+                                                   type);
+
+    if (!emulator) {
+        virDomainReportError(conn, VIR_ERR_INTERNAL_ERROR,
+                             _("no emulator for domain %s os type %s on architecture %s"),
+                             type, def->os.type, def->os.arch);
+        return NULL;
+    }
+
+    return emulator;
+}
+
+
 #endif /* ! PROXY */

src/domain_conf.h

@@ -562,6 +562,11 @@ int virDiskNameToBusDeviceIndex(virDomainDiskDefPtr disk,
 virDomainNetDefPtr virDomainNetDefParseXML(virConnectPtr conn,
                         xmlNodePtr node);
 
+const char *virDomainDefDefaultEmulator(virConnectPtr conn,
+                                        virDomainDefPtr def,
+                                        virCapsPtr caps);
+
+
 VIR_ENUM_DECL(virDomainVirt)
 VIR_ENUM_DECL(virDomainBoot)
 VIR_ENUM_DECL(virDomainFeature)

src/lxc_driver.c

@@ -623,6 +623,8 @@ static int lxcControllerStart(virConnectPtr conn,
     int status;
     fd_set keepfd;
     char appPtyStr[30];
+    const char *emulator;
+    lxc_driver_t *driver = conn->privateData;
 
     FD_ZERO(&keepfd);
 
@@ -650,7 +652,13 @@ static int lxcControllerStart(virConnectPtr conn,
 
     snprintf(appPtyStr, sizeof(appPtyStr), "%d", appPty);
 
-    ADD_ARG_LIT(vm->def->emulator);
+    emulator = vm->def->emulator;
+    if (!emulator)
+        emulator = virDomainDefDefaultEmulator(conn, vm->def, driver->caps);
+    if (!emulator)
+        return -1;
+
+    ADD_ARG_LIT(emulator);
     ADD_ARG_LIT("--name");
     ADD_ARG_LIT(vm->def->name);
     ADD_ARG_LIT("--console");

src/qemu_conf.c

@@ -728,6 +728,7 @@ int qemudBuildCommandLine(virConnectPtr conn,
     int disableKQEMU = 0;
     int qargc = 0, qarga = 0;
     const char **qargv = NULL;
+    const char *emulator;
 
     uname(&ut);
 
@@ -783,6 +784,11 @@ int qemudBuildCommandLine(virConnectPtr conn,
     snprintf(memory, sizeof(memory), "%lu", vm->def->memory/1024);
     snprintf(vcpus, sizeof(vcpus), "%lu", vm->def->vcpus);
 
+    emulator = vm->def->emulator;
+    if (!emulator)
+        emulator = virDomainDefDefaultEmulator(conn, vm->def, driver->caps);
+    if (!emulator)
+        return -1;
 
     ADD_ARG_LIT(vm->def->emulator);
     ADD_ARG_LIT("-S");

src/qemu_driver.c

@@ -850,6 +850,7 @@ static int qemudStartVMDaemon(virConnectPtr conn,
     int ntapfds = 0;
     unsigned int qemuCmdFlags;
     fd_set keepfd;
+    const char *emulator;
 
     FD_ZERO(&keepfd);
 
@@ -909,24 +910,30 @@ static int qemudStartVMDaemon(virConnectPtr conn,
         return -1;
     }
 
+    emulator = vm->def->emulator;
+    if (!emulator)
+        emulator = virDomainDefDefaultEmulator(conn, vm->def, driver->caps);
+    if (!emulator)
+        return -1;
+
     /* Make sure the binary we are about to try exec'ing exists.
      * Technically we could catch the exec() failure, but that's
      * in a sub-process so its hard to feed back a useful error
      */
-    if (stat(vm->def->emulator, &sb) < 0) {
+    if (stat(emulator, &sb) < 0) {
         qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
                          _("Cannot find QEMU binary %s: %s"),
-                         vm->def->emulator,
+                         emulator,
                          strerror(errno));
         return -1;
     }
 
-    if (qemudExtractVersionInfo(vm->def->emulator,
+    if (qemudExtractVersionInfo(emulator,
                                 NULL,
                                 &qemuCmdFlags) < 0) {
         qemudReportError(conn, NULL, NULL, VIR_ERR_INTERNAL_ERROR,
                          _("Cannot determine QEMU argv syntax %s"),
-                         vm->def->emulator);
+                         emulator);
         return -1;
     }
 

src/xm_internal.c

@@ -785,26 +785,6 @@ xenXMDomainConfigParse(virConnectPtr conn, virConfPtr conf) {
     if (xenXMConfigCopyStringOpt(conn, conf, "device_model", &def->emulator) < 0)
         goto cleanup;
 
-    if (def->emulator == NULL) {
-        const char *type = virDomainVirtTypeToString(def->virtType);
-        if (!type) {
-            xenXMError(conn, VIR_ERR_INTERNAL_ERROR,
-                       "%s", _("unknown virt type"));
-            goto cleanup;
-        }
-        const char *emulator = virCapabilitiesDefaultGuestEmulator(priv->caps,
-                                                                   def->os.type,
-                                                                   def->os.arch,
-                                                                   type);
-        if (!emulator) {
-            xenXMError(conn, VIR_ERR_INTERNAL_ERROR,
-                       "%s", _("unsupported guest type"));
-            goto cleanup;
-        }
-        if (!(def->emulator = strdup(emulator)))
-            goto no_memory;
-    }
-
     list = virConfGetValue(conf, "disk");
     if (list && list->type == VIR_CONF_LIST) {
         list = list->list;

tests/xmconfigdata/test-paravirt-net-e1000.xml

@@ -13,7 +13,6 @@
   <on_reboot>restart</on_reboot>
   <on_crash>restart</on_crash>
   <devices>
-    <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
     <disk type='block' device='disk'>
       <driver name='phy'/>
       <source dev='/dev/HostVG/XenGuest1'/>

tests/xmconfigdata/test-paravirt-new-pvfb.xml

@@ -13,7 +13,6 @@
   <on_reboot>restart</on_reboot>
   <on_crash>restart</on_crash>
   <devices>
-    <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
     <disk type='block' device='disk'>
       <driver name='phy'/>
       <source dev='/dev/HostVG/XenGuest1'/>

tests/xmconfigdata/test-paravirt-old-pvfb.xml

@@ -13,7 +13,6 @@
   <on_reboot>restart</on_reboot>
   <on_crash>restart</on_crash>
   <devices>
-    <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
     <disk type='block' device='disk'>
       <driver name='phy'/>
       <source dev='/dev/HostVG/XenGuest1'/>

tests/xml2sexprdata/xml2sexpr-fv-kernel.xml

@@ -14,6 +14,7 @@
   <on_reboot>destroy</on_reboot>
   <on_crash>destroy</on_crash>
   <devices>
+    <emulator>/usr/lib/xen/bin/qemu-dm</emulator>
     <disk type='file' device='disk'>
       <source file='/root/some.img'/>
       <target dev='xvda'/>

tests/xml2sexprdata/xml2sexpr-pv-vfb-new.sexpr

-(vm (name 'pvtest')(memory 420)(maxmem 420)(vcpus 2)(uuid '596a5d21-71f4-8fb2-e068-e2386a5c413e')(on_poweroff 'destroy')(on_reboot 'destroy')(on_crash 'destroy')(image (linux (kernel '/var/lib/xen/vmlinuz.2Dn2YT')(ramdisk '/var/lib/xen/initrd.img.0u-Vhq')(args ' method=http://download.fedora.devel.redhat.com/pub/fedora/linux/core/test/5.91/x86_64/os  ')(device_model '/usr/lib/xen/bin/qemu-dm')))(device (vbd (dev 'xvda')(uname 'file:/root/some.img')(mode 'w')))(device (vkbd))(device (vfb (type vnc)(vncunused 0)(vncdisplay 6)(vnclisten '127.0.0.1')(vncpasswd '123456')(keymap 'ja'))))
\ No newline at end of file
+(vm (name 'pvtest')(memory 420)(maxmem 420)(vcpus 2)(uuid '596a5d21-71f4-8fb2-e068-e2386a5c413e')(on_poweroff 'destroy')(on_reboot 'destroy')(on_crash 'destroy')(image (linux (kernel '/var/lib/xen/vmlinuz.2Dn2YT')(ramdisk '/var/lib/xen/initrd.img.0u-Vhq')(args ' method=http://download.fedora.devel.redhat.com/pub/fedora/linux/core/test/5.91/x86_64/os  ')))(device (vbd (dev 'xvda')(uname 'file:/root/some.img')(mode 'w')))(device (vkbd))(device (vfb (type vnc)(vncunused 0)(vncdisplay 6)(vnclisten '127.0.0.1')(vncpasswd '123456')(keymap 'ja'))))
\ No newline at end of file