[PULL 11/11] qapi: New -compat deprecated-input=crash

[Markus Armbruster <armbru@redhat.com>]

Policy "crash" calls abort() when deprecated input is received.

Bugs in integration tests may mask the error from policy "reject".
Provide a larger hammer: crash outright.  Masking that seems unlikely.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210312153210.2810514-11-armbru@redhat.com>
---
 qapi/compat.json             | 3 ++-
 qapi/qmp-dispatch.c          | 1 +
 qapi/qobject-input-visitor.c | 1 +
 qemu-options.hx              | 4 +++-
 4 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/qapi/compat.json b/qapi/compat.json
index fc24a58a9e..ae3afc22df 100644
--- a/qapi/compat.json
+++ b/qapi/compat.json
@@ -11,11 +11,12 @@
 #
 # @accept: Accept silently
 # @reject: Reject with an error
+# @crash: abort() the process
 #
 # Since: 6.0
 ##
 { 'enum': 'CompatPolicyInput',
-  'data': [ 'accept', 'reject' ] }
+  'data': [ 'accept', 'reject', 'crash' ] }
 
 ##
 # @CompatPolicyOutput:
diff --git a/qapi/qmp-dispatch.c b/qapi/qmp-dispatch.c
index cbc4452341..12657d635e 100644
--- a/qapi/qmp-dispatch.c
+++ b/qapi/qmp-dispatch.c
@@ -167,6 +167,7 @@ QDict *qmp_dispatch(const QmpCommandList *cmds, QObject *request,
                       "Deprecated command %s disabled by policy",
                       command);
             goto out;
+        case COMPAT_POLICY_INPUT_CRASH:
         default:
             abort();
         }
diff --git a/qapi/qobject-input-visitor.c b/qapi/qobject-input-visitor.c
index 1b8fa1f2f6..baad0dcd3c 100644
--- a/qapi/qobject-input-visitor.c
+++ b/qapi/qobject-input-visitor.c
@@ -676,6 +676,7 @@ static bool qobject_input_deprecated_accept(Visitor *v, const char *name,
         error_setg(errp, "Deprecated parameter '%s' disabled by policy",
                    name);
         return false;
+    case COMPAT_POLICY_INPUT_CRASH:
     default:
         abort();
     }
diff --git a/qemu-options.hx b/qemu-options.hx
index f34d592eb1..2b5df64cdf 100644
--- a/qemu-options.hx
+++ b/qemu-options.hx
@@ -3471,7 +3471,7 @@ DEFHEADING()
 DEFHEADING(Debug/Expert options:)
 
 DEF("compat", HAS_ARG, QEMU_OPTION_compat,
-    "-compat [deprecated-input=accept|reject][,deprecated-output=accept|hide]\n"
+    "-compat [deprecated-input=accept|reject|crash][,deprecated-output=accept|hide]\n"
     "                Policy for handling deprecated management interfaces\n",
     QEMU_ARCH_ALL)
 SRST
@@ -3482,6 +3482,8 @@ SRST
         Accept deprecated commands and arguments
     ``deprecated-input=reject``
         Reject deprecated commands and arguments
+    ``deprecated-input=crash``
+        Crash on deprecated commands and arguments
     ``deprecated-output=accept`` (default)
         Emit deprecated command results and events
     ``deprecated-output=hide``
-- 
2.26.2