Add support for -uuid and -domid args to QEMU

ChangeLog

+Tue Nov  4 22:14:31 UTC 2008 Daniel P. Berrange <berrange@redhat.com>
+
+	Support passing UUID and ID to qemu/xenner
+	* src/qemu_conf.c, src/qemu_conf.h, src/qemu_driver.c: Detect
+	availability of -uuid and -domid args in QEMU, and use them if
+	available
+	* tests/qemuxml2argvtest.c,
+	tests/qemuxml2argvdata/qemuxml2argv-misc-uuid.args,
+	tests/qemuxml2argvdata/qemuxml2argv-misc-uuid.xml: Add test
+	case for -uuid and -domid args
+
 Tue Nov  4 21:50:31 UTC 2008 Daniel P. Berrange <berrange@redhat.com>
 
 	Remove use of virStringList

src/qemu_conf.c

@@ -439,6 +439,10 @@ int qemudExtractVersionInfo(const char *qemu,
         flags |= QEMUD_CMD_FLAG_NO_REBOOT;
     if (strstr(help, "-name"))
         flags |= QEMUD_CMD_FLAG_NAME;
+    if (strstr(help, "-uuid"))
+        flags |= QEMUD_CMD_FLAG_UUID;
+    if (strstr(help, "-domid"))
+        flags |= QEMUD_CMD_FLAG_DOMID;
     if (strstr(help, "-drive"))
         flags |= QEMUD_CMD_FLAG_DRIVE;
     if (strstr(help, "boot=on"))
@@ -713,6 +717,8 @@ int qemudBuildCommandLine(virConnectPtr conn,
     int qenvc = 0, qenva = 0;
     const char **qenv = NULL;
     const char *emulator;
+    char uuid[VIR_UUID_STRING_BUFLEN];
+    char domid[50];
 
     uname(&ut);
 
@@ -723,6 +729,8 @@ int qemudBuildCommandLine(virConnectPtr conn,
         !ut.machine[4])
         ut.machine[1] = '6';
 
+    virUUIDFormat(vm->def->uuid, uuid);
+
     /* Need to explicitly disable KQEMU if
      * 1. Arch matches host arch
      * 2. Guest is 'qemu'
@@ -802,6 +810,7 @@ int qemudBuildCommandLine(virConnectPtr conn,
 
     snprintf(memory, sizeof(memory), "%lu", vm->def->memory/1024);
     snprintf(vcpus, sizeof(vcpus), "%lu", vm->def->vcpus);
+    snprintf(domid, sizeof(domid), "%d", vm->def->id);
 
     ADD_ENV_LIT("LC_ALL=C");
 
@@ -834,6 +843,15 @@ int qemudBuildCommandLine(virConnectPtr conn,
         ADD_ARG_LIT("-name");
         ADD_ARG_LIT(vm->def->name);
     }
+    if (qemuCmdFlags & QEMUD_CMD_FLAG_UUID) {
+        ADD_ARG_LIT("-uuid");
+        ADD_ARG_LIT(uuid);
+    }
+    if (qemuCmdFlags & QEMUD_CMD_FLAG_DOMID) {
+        ADD_ARG_LIT("-domid");
+        ADD_ARG_LIT(domid);
+    }
+
     /*
      * NB, -nographic *MUST* come before any serial, or monitor
      * or parallel port flags due to QEMU craziness, where it

src/qemu_conf.h

@@ -44,6 +44,8 @@ enum qemud_cmd_flags {
     QEMUD_CMD_FLAG_DRIVE          = (1 << 3),
     QEMUD_CMD_FLAG_DRIVE_BOOT     = (1 << 4),
     QEMUD_CMD_FLAG_NAME           = (1 << 5),
+    QEMUD_CMD_FLAG_UUID           = (1 << 6),
+    QEMUD_CMD_FLAG_DOMID          = (1 << 7), /* Xenner only */
 };
 
 /* Main driver state */

src/qemu_driver.c

@@ -860,10 +860,12 @@ static int qemudStartVMDaemon(virConnectPtr conn,
         return -1;
     }
 
+    vm->def->id = driver->nextvmid++;
     if (qemudBuildCommandLine(conn, driver, vm,
                               qemuCmdFlags, &argv, &progenv,
                               &tapfds, &ntapfds, migrateFrom) < 0) {
         close(vm->logfile);
+        vm->def->id = -1;
         vm->logfile = -1;
         return -1;
     }
@@ -901,10 +903,10 @@ static int qemudStartVMDaemon(virConnectPtr conn,
     ret = virExec(conn, argv, progenv, &keepfd, &vm->pid,
                   vm->stdin_fd, &vm->stdout_fd, &vm->stderr_fd,
                   VIR_EXEC_NONBLOCK);
-    if (ret == 0) {
-        vm->def->id = driver->nextvmid++;
+    if (ret == 0)
         vm->state = migrateFrom ? VIR_DOMAIN_PAUSED : VIR_DOMAIN_RUNNING;
-    }
+    else
+        vm->def->id = -1;
 
     for (i = 0 ; argv[i] ; i++)
         VIR_FREE(argv[i]);

tests/qemuxml2argvdata/qemuxml2argv-misc-uuid.args

+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -name QEMUGuest1 -uuid c7a5fdbd-edaf-9455-926a-d65c16db1809 -domid 6 -nographic -monitor pty -boot c -hda /dev/HostVG/QEMUGuest1 -net none -serial none -parallel none -usb

tests/qemuxml2argvdata/qemuxml2argv-misc-uuid.xml

+<domain type='qemu'>
+  <name>QEMUGuest1</name>
+  <uuid>c7a5fdbd-edaf-9455-926a-d65c16db1809</uuid>
+  <memory>219200</memory>
+  <currentMemory>219200</currentMemory>
+  <vcpu>1</vcpu>
+  <os>
+    <type arch='i686' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <features>
+    <acpi/>
+  </features>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>destroy</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu</emulator>
+    <disk type='block' device='disk'>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+    </disk>
+  </devices>
+</domain>

tests/qemuxml2argvtest.c

@@ -43,6 +43,9 @@ static int testCompareXMLToArgvFiles(const char *xml,
 
     memset(&vm, 0, sizeof vm);
     vm.def = vmdef;
+    if (extraFlags & QEMUD_CMD_FLAG_DOMID)
+        vm.def->id = 6;
+    else
         vm.def->id = -1;
     vm.pid = -1;
 
@@ -196,6 +199,8 @@ mymain(int argc, char **argv)
     DO_TEST("input-xen", 0);
     DO_TEST("misc-acpi", 0);
     DO_TEST("misc-no-reboot", 0);
+    DO_TEST("misc-uuid", QEMUD_CMD_FLAG_NAME |
+        QEMUD_CMD_FLAG_UUID | QEMUD_CMD_FLAG_DOMID);
     DO_TEST("net-user", 0);
     DO_TEST("net-virtio", 0);