[RFC PATCH 3/3] qemu: command: Handle formatting of '-compat' options

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Enable '-compat' if requested in qemu.conf and supported by qemu to
instruct qemu to crash when a deprecated command is used and stop
returning deprecated fields.

This setting is meant for libvirt developers and such.
---
 src/qemu/qemu_command.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 6acfc0b19d..5a4769e969 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -9801,6 +9801,20 @@ qemuBuildVsockCommandLine(virCommandPtr cmd,
 }


+static void
+qemuBuildCompatDeprecatedCommandLine(virCommandPtr cmd,
+                                     virQEMUDriverConfigPtr cfg,
+                                     virQEMUCapsPtr qemuCaps)
+{
+    if (!cfg->deprecatedDebug ||
+        !virQEMUCapsGet(qemuCaps, QEMU_CAPS_COMPAT_DEPRECATED))
+        return;
+
+    virCommandAddArgList(cmd, "-compat",
+                         "deprecated-input=crash,deprecated-output=hide", NULL);
+}
+
+
 /*
  * Constructs a argv suitable for launching qemu with config defined
  * for a given virtual machine.
@@ -9860,6 +9874,8 @@ qemuBuildCommandLine(virQEMUDriverPtr driver,
     if (qemuBuildNameCommandLine(cmd, cfg, def, qemuCaps) < 0)
         return NULL;

+    qemuBuildCompatDeprecatedCommandLine(cmd, cfg, qemuCaps);
+
     if (!standalone)
         virCommandAddArg(cmd, "-S"); /* freeze CPU */

-- 
2.26.2





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