qemu: add -incoming fd:n capability checking

* src/qemu/qemu_capabilities.h (QEMUD_CMD_FLAG_MIGRATE_QEMU_FD):
New enum value.
* src/qemu/qemu_capabilities.c (qemuCapsComputeCmdFlags): Populate
flags according to qemu version.
* tests/qemuhelptest.c (mymain): Adjust test.

src/qemu/qemu_capabilities.c

@@ -943,6 +943,8 @@ qemuCapsComputeCmdFlags(const char *help,
      * Handling of -incoming arg with varying features
      *  -incoming tcp    (kvm >= 79, qemu >= 0.10.0)
      *  -incoming exec   (kvm >= 80, qemu >= 0.10.0)
+     *  -incoming unix   (qemu >= 0.12.0)
+     *  -incoming fd     (qemu >= 0.12.0)
      *  -incoming stdio  (all earlier kvm)
      *
      * NB, there was a pre-kvm-79 'tcp' support, but it
@@ -952,8 +954,10 @@ qemuCapsComputeCmdFlags(const char *help,
     if (version >= 10000) {
         flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP;
         flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_EXEC;
-        if (version >= 12000)
+        if (version >= 12000) {
             flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_UNIX;
+            flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_FD;
+        }
     } else if (kvm_version >= 79) {
         flags |= QEMUD_CMD_FLAG_MIGRATE_QEMU_TCP;
         if (kvm_version >= 80)

src/qemu/qemu_capabilities.h

@@ -82,6 +82,7 @@ enum qemuCapsFlags {
     QEMUD_CMD_FLAG_VGA_QXL       = (1LL << 45), /* The 'qxl' arg for '-vga' */
     QEMUD_CMD_FLAG_SPICE         = (1LL << 46), /* Is -spice avail */
     QEMUD_CMD_FLAG_VGA_NONE      = (1LL << 47), /* The 'none' arg for '-vga' */
+    QEMUD_CMD_FLAG_MIGRATE_QEMU_FD = (1LL << 48), /* -incoming fd:n */
 };
 
 virCapsPtr qemuCapsInit(virCapsPtr old_caps);

tests/qemuhelptest.c

@@ -286,7 +286,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_BOOT_MENU |
             QEMUD_CMD_FLAG_NAME_PROCESS |
             QEMUD_CMD_FLAG_SMBIOS_TYPE |
-            QEMUD_CMD_FLAG_VGA_NONE,
+            QEMUD_CMD_FLAG_VGA_NONE |
+            QEMUD_CMD_FLAG_MIGRATE_QEMU_FD,
             12001, 0,  0);
     DO_TEST("qemu-kvm-0.12.1.2-rhel60",
             QEMUD_CMD_FLAG_VNC_COLON |
@@ -324,7 +325,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_SMBIOS_TYPE |
             QEMUD_CMD_FLAG_VGA_QXL |
             QEMUD_CMD_FLAG_SPICE |
-            QEMUD_CMD_FLAG_VGA_NONE,
+            QEMUD_CMD_FLAG_VGA_NONE |
+            QEMUD_CMD_FLAG_MIGRATE_QEMU_FD,
             12001, 1,  0);
     DO_TEST("qemu-kvm-0.12.3",
             QEMUD_CMD_FLAG_VNC_COLON |
@@ -360,7 +362,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_NESTING |
             QEMUD_CMD_FLAG_NAME_PROCESS |
             QEMUD_CMD_FLAG_SMBIOS_TYPE |
-            QEMUD_CMD_FLAG_VGA_NONE,
+            QEMUD_CMD_FLAG_VGA_NONE |
+            QEMUD_CMD_FLAG_MIGRATE_QEMU_FD,
             12003, 1,  0);
     DO_TEST("qemu-kvm-0.13.0",
             QEMUD_CMD_FLAG_VNC_COLON |
@@ -403,7 +406,8 @@ mymain(int argc, char **argv)
             QEMUD_CMD_FLAG_NAME_PROCESS |
             QEMUD_CMD_FLAG_SMBIOS_TYPE |
             QEMUD_CMD_FLAG_SPICE |
-            QEMUD_CMD_FLAG_VGA_NONE,
+            QEMUD_CMD_FLAG_VGA_NONE |
+            QEMUD_CMD_FLAG_MIGRATE_QEMU_FD,
             13000, 1,  0);
 
     return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;