Add enospace option to qemu disk error policy

* Dan Kenigsberg requested explicit support for the qemu default disk error policy which is enospace

docs/schemas/domain.rng

@@ -629,6 +629,7 @@
       <choice>
         <value>stop</value>
         <value>ignore</value>
+        <value>enospace</value>
       </choice>
     </attribute>
   </define>

src/conf/domain_conf.c

@@ -129,7 +129,8 @@ VIR_ENUM_IMPL(virDomainDiskCache, VIR_DOMAIN_DISK_CACHE_LAST,
 VIR_ENUM_IMPL(virDomainDiskErrorPolicy, VIR_DOMAIN_DISK_ERROR_POLICY_LAST,
               "default",
               "stop",
-              "ignore")
+              "ignore",
+              "enospace")
 
 VIR_ENUM_IMPL(virDomainController, VIR_DOMAIN_CONTROLLER_TYPE_LAST,
               "ide",

src/conf/domain_conf.h

@@ -156,6 +156,7 @@ enum  virDomainDiskErrorPolicy {
     VIR_DOMAIN_DISK_ERROR_POLICY_DEFAULT,
     VIR_DOMAIN_DISK_ERROR_POLICY_STOP,
     VIR_DOMAIN_DISK_ERROR_POLICY_IGNORE,
+    VIR_DOMAIN_DISK_ERROR_POLICY_ENOSPACE,
 
     VIR_DOMAIN_DISK_ERROR_POLICY_LAST
 };

src/qemu/qemu_conf.c

@@ -4938,6 +4938,8 @@ qemuParseCommandLineDisk(const char *val,
                 def->error_policy = VIR_DOMAIN_DISK_ERROR_POLICY_STOP;
             else if (STREQ(values[i], "ignore"))
                 def->error_policy = VIR_DOMAIN_DISK_ERROR_POLICY_IGNORE;
+            else if (STREQ(values[i], "enospace"))
+                def->error_policy = VIR_DOMAIN_DISK_ERROR_POLICY_ENOSPACE;
         } else if (STREQ(keywords[i], "index")) {
             if (virStrToLong_i(values[i], NULL, 10, &idx) < 0) {
                 virDomainDiskDefFree(def);

tests/qemuargv2xmltest.c

@@ -165,6 +165,9 @@ mymain(int argc, char **argv)
     DO_TEST("disk-drive-error-policy-stop", QEMUD_CMD_FLAG_DRIVE |
             QEMUD_CMD_FLAG_MONITOR_JSON |
             QEMUD_CMD_FLAG_DRIVE_FORMAT);
+    DO_TEST("disk-drive-error-policy-enospace", QEMUD_CMD_FLAG_DRIVE |
+            QEMUD_CMD_FLAG_MONITOR_JSON |
+            QEMUD_CMD_FLAG_DRIVE_FORMAT);
     DO_TEST("disk-drive-cache-v2-wt", QEMUD_CMD_FLAG_DRIVE |
             QEMUD_CMD_FLAG_DRIVE_CACHE_V2);
     DO_TEST("disk-drive-cache-v2-wb", QEMUD_CMD_FLAG_DRIVE |

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-error-policy-enospace.args

+LC_ALL=C PATH=/bin HOME=/home/test USER=test LOGNAME=test /usr/bin/qemu -S -M pc -m 214 -smp 1 -nographic -monitor unix:/tmp/test-monitor,server,nowait -no-acpi -boot c -drive file=/dev/HostVG/QEMUGuest1,if=ide,bus=0,unit=0,format=qcow2,cache=off,werror=enospace,rerror=enospace -drive file=/dev/HostVG/QEMUGuest2,if=ide,media=cdrom,bus=1,unit=0,format=raw -net none -serial none -parallel none -usb

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-error-policy-enospace.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>
+  <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'>
+      <driver name='qemu' type='qcow2' cache='none' error_policy='enospace'/>
+      <source dev='/dev/HostVG/QEMUGuest1'/>
+      <target dev='hda' bus='ide'/>
+      <address type='drive' controller='0' bus='0' unit='0'/>
+    </disk>
+    <disk type='block' device='cdrom'>
+      <driver name='qemu' type='raw'/>
+      <source dev='/dev/HostVG/QEMUGuest2'/>
+      <target dev='hdc' bus='ide'/>
+      <readonly/>
+      <address type='drive' controller='0' bus='1' unit='0'/>
+    </disk>
+    <controller type='ide' index='0'/>
+  </devices>
+</domain>