qemu: Use qemuAliasFromDisk instead of qemuDeviceDriveHostAlias

Since we already have a function that will generate the drivestr from
the alias, let's use it and remove the qemuDeviceDriveHostAlias.

Move the QEMU_DRIVE_HOST_PREFIX definition into qemu_alias.h

Also alter qemuAliasFromDisk to use the QEMU_DRIVE_HOST_PREFIX instead
of "drive-%s".

src/qemu/qemu_alias.c

@@ -451,17 +451,26 @@ qemuAssignDeviceAliases(virDomainDefPtr def, virQEMUCapsPtr qemuCaps)
 }
 
 
+/* qemuAliasFromDisk
+ * @disk: Pointer to a disk definition
+ *
+ * Generate and return an alias for the device disk '-drive'
+ *
+ * Returns NULL with error or a string containing the alias
+ */
 char *
 qemuAliasFromDisk(const virDomainDiskDef *disk)
 {
     char *ret;
 
     if (!disk->info.alias) {
-        virReportError(VIR_ERR_INVALID_ARG, "%s", _("disk does not have an alias"));
+        virReportError(VIR_ERR_INVALID_ARG, "%s",
+                       _("disk does not have an alias"));
         return NULL;
     }
 
-    ignore_value(virAsprintf(&ret, "drive-%s", disk->info.alias));
+    ignore_value(virAsprintf(&ret, "%s%s", QEMU_DRIVE_HOST_PREFIX,
+                             disk->info.alias));
 
     return ret;
 }

src/qemu/qemu_alias.h

@@ -30,6 +30,8 @@
 # include "qemu_domain.h"
 # include "qemu_domain_address.h"
 
+# define QEMU_DRIVE_HOST_PREFIX "drive-"
+
 int qemuAssignDeviceChrAlias(virDomainDefPtr def,
                              virDomainChrDefPtr chr,
                              ssize_t idx);

src/qemu/qemu_command.c

@@ -274,17 +274,6 @@ qemuVirCommandGetDevSet(virCommandPtr cmd, int fd)
 }
 
 
-char *qemuDeviceDriveHostAlias(virDomainDiskDefPtr disk)
-{
-    char *ret;
-
-    if (virAsprintf(&ret, "%s%s",
-                    QEMU_DRIVE_HOST_PREFIX, disk->info.alias) < 0)
-        return NULL;
-    return ret;
-}
-
-
 static int
 qemuBuildDeviceAddressStr(virBufferPtr buf,
                           const virDomainDef *domainDef,

src/qemu/qemu_command.h

@@ -37,7 +37,6 @@
 /* Config type for XML import/export conversions */
 # define QEMU_CONFIG_FORMAT_ARGV "qemu-argv"
 
-# define QEMU_DRIVE_HOST_PREFIX "drive-"
 # define QEMU_FSDEV_HOST_PREFIX "fsdev-"
 
 # define QEMU_BLOCK_IOTUNE_MAX 1000000000000000LL

src/qemu/qemu_hotplug.c

@@ -229,7 +229,7 @@ qemuDomainChangeEjectableMedia(virQEMUDriverPtr driver,
     if (qemuDomainPrepareDisk(driver, vm, disk, newsrc, false) < 0)
         goto cleanup;
 
-    if (!(driveAlias = qemuDeviceDriveHostAlias(disk)))
+    if (!(driveAlias = qemuAliasFromDisk(disk)))
         goto error;
 
     qemuDomainObjEnterMonitor(driver, vm);
@@ -369,7 +369,7 @@ qemuDomainAttachVirtioDiskDevice(virConnectPtr conn,
     if (!(drivestr = qemuBuildDriveStr(disk, false, priv->qemuCaps)))
         goto error;
 
-    if (!(drivealias = qemuDeviceDriveHostAlias(disk)))
+    if (!(drivealias = qemuAliasFromDisk(disk)))
         goto error;
 
     if (!(devstr = qemuBuildDriveDevStr(vm->def, disk, 0, priv->qemuCaps)))

src/qemu/qemu_migration.c

@@ -36,7 +36,7 @@
 #include "qemu_domain.h"
 #include "qemu_process.h"
 #include "qemu_capabilities.h"
-#include "qemu_command.h"
+#include "qemu_alias.h"
 #include "qemu_cgroup.h"
 #include "qemu_hotplug.h"
 #include "qemu_blockjob.h"

src/qemu/qemu_monitor_json.c

@@ -33,7 +33,7 @@
 
 #include "qemu_monitor_text.h"
 #include "qemu_monitor_json.h"
-#include "qemu_command.h"
+#include "qemu_alias.h"
 #include "qemu_parse_command.h"
 #include "qemu_capabilities.h"
 #include "viralloc.h"

src/qemu/qemu_monitor_text.c

@@ -31,7 +31,7 @@
 #include <string.h>
 
 #include "qemu_monitor_text.h"
-#include "qemu_command.h"
+#include "qemu_alias.h"
 #include "c-ctype.h"
 #include "c-strcasestr.h"
 #include "viralloc.h"