qemu: move functions for handling FD passing

The functions for handling FD passing when building command line
arguments need to be used by many different bits of code, so need
to be at the start of the source file
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

src/qemu/qemu_command.c

@@ -149,6 +149,59 @@ VIR_ENUM_IMPL(qemuNumaPolicy, VIR_DOMAIN_NUMATUNE_MEM_LAST,
               "preferred",
               "interleave");
 
+/**
+ * qemuVirCommandGetFDSet:
+ * @cmd: the command to modify
+ * @fd: fd to reassign to the child
+ *
+ * Get the parameters for the QEMU -add-fd command line option
+ * for the given file descriptor. The file descriptor must previously
+ * have been 'transferred' in a virCommandPassFD() call.
+ * This function for example returns "set=10,fd=20".
+ */
+static char *
+qemuVirCommandGetFDSet(virCommandPtr cmd, int fd)
+{
+    char *result = NULL;
+    int idx = virCommandPassFDGetFDIndex(cmd, fd);
+
+    if (idx >= 0) {
+        ignore_value(virAsprintf(&result, "set=%d,fd=%d", idx, fd));
+    } else {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("file descriptor %d has not been transferred"), fd);
+    }
+
+    return result;
+}
+
+
+/**
+ * qemuVirCommandGetDevSet:
+ * @cmd: the command to modify
+ * @fd: fd to reassign to the child
+ *
+ * Get the parameters for the QEMU path= parameter where a file
+ * descriptor is accessed via a file descriptor set, for example
+ * /dev/fdset/10. The file descriptor must previously have been
+ * 'transferred' in a virCommandPassFD() call.
+ */
+static char *
+qemuVirCommandGetDevSet(virCommandPtr cmd, int fd)
+{
+    char *result = NULL;
+    int idx = virCommandPassFDGetFDIndex(cmd, fd);
+
+    if (idx >= 0) {
+        ignore_value(virAsprintf(&result, "/dev/fdset/%d", idx));
+    } else {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("file descriptor %d has not been transferred"), fd);
+    }
+    return result;
+}
+
+
 static int
 qemuBuildObjectCommandLinePropsInternal(const char *key,
                                         const virJSONValue *value,
@@ -6748,59 +6801,6 @@ qemuBuildTPMDevStr(const virDomainDef *def,
 }
 
 
-/**
- * qemuVirCommandGetFDSet:
- * @cmd: the command to modify
- * @fd: fd to reassign to the child
- *
- * Get the parameters for the QEMU -add-fd command line option
- * for the given file descriptor. The file descriptor must previously
- * have been 'transferred' in a virCommandPassFD() call.
- * This function for example returns "set=10,fd=20".
- */
-static char *
-qemuVirCommandGetFDSet(virCommandPtr cmd, int fd)
-{
-    char *result = NULL;
-    int idx = virCommandPassFDGetFDIndex(cmd, fd);
-
-    if (idx >= 0) {
-        ignore_value(virAsprintf(&result, "set=%d,fd=%d", idx, fd));
-    } else {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("file descriptor %d has not been transferred"), fd);
-    }
-
-    return result;
-}
-
-
-/**
- * qemuVirCommandGetDevSet:
- * @cmd: the command to modify
- * @fd: fd to reassign to the child
- *
- * Get the parameters for the QEMU path= parameter where a file
- * descriptor is accessed via a file descriptor set, for example
- * /dev/fdset/10. The file descriptor must previously have been
- * 'transferred' in a virCommandPassFD() call.
- */
-static char *
-qemuVirCommandGetDevSet(virCommandPtr cmd, int fd)
-{
-    char *result = NULL;
-    int idx = virCommandPassFDGetFDIndex(cmd, fd);
-
-    if (idx >= 0) {
-        ignore_value(virAsprintf(&result, "/dev/fdset/%d", idx));
-    } else {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("file descriptor %d has not been transferred"), fd);
-    }
-    return result;
-}
-
-
 static char *
 qemuBuildTPMBackendStr(const virDomainDef *def,
                        virCommandPtr cmd,