[PATCH v3 1/4] qemu: probe for -chardev 'fd' parameter for FD passing

[Daniel P. Berrangé <berrange@xxxxxxxxxx>]

QEMU >= 2.12 will support passing of pre-opened file descriptors for
socket based character devices.

Reviewed-by: John Ferlan <jferlan@xxxxxxxxxx>
Signed-off-by: Daniel P. Berrangé <berrange@xxxxxxxxxx>
---
 src/qemu/qemu_capabilities.c                       | 2 ++
 src/qemu/qemu_capabilities.h                       | 1 +
 tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml | 1 +
 tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml   | 1 +
 tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml   | 1 +
 tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml  | 1 +
 6 files changed, 7 insertions(+)

diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index a5cb24fec6..9a2b976e46 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -486,6 +486,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
 
               /* 300 */
               "sdl-gl",
+              "chardev-fd-pass",
     );
 
 
@@ -2495,6 +2496,7 @@ static struct virQEMUCapsCommandLineProps virQEMUCapsCommandLine[] = {
     { "vnc", "vnc", QEMU_CAPS_VNC_MULTI_SERVERS },
     { "chardev", "reconnect", QEMU_CAPS_CHARDEV_RECONNECT },
     { "sandbox", "elevateprivileges", QEMU_CAPS_SECCOMP_BLACKLIST },
+    { "chardev", "fd", QEMU_CAPS_CHARDEV_FD_PASS },
 };
 
 static int
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index d23c34c24d..f8f8c3e0cb 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -470,6 +470,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */
 
     /* 300 */
     QEMU_CAPS_SDL_GL, /* -sdl gl */
+    QEMU_CAPS_CHARDEV_FD_PASS, /* Passing pre-opened FDs for chardevs */
 
     QEMU_CAPS_LAST /* this must always be the last item */
 } virQEMUCapsFlags;
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
index cabe4f2f07..3c6d9ef7ed 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.aarch64.xml
@@ -162,6 +162,7 @@
   <flag name='qom-list-properties'/>
   <flag name='memory-backend-file.discard-data'/>
   <flag name='sdl-gl'/>
+  <flag name='chardev-fd-pass'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>343099</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
index bffe3b3b97..b7d6b0c5f4 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.ppc64.xml
@@ -159,6 +159,7 @@
   <flag name='qom-list-properties'/>
   <flag name='memory-backend-file.discard-data'/>
   <flag name='sdl-gl'/>
+  <flag name='chardev-fd-pass'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>419968</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
index 138be92fad..bdf08f8ffd 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.s390x.xml
@@ -127,6 +127,7 @@
   <flag name='virtual-css-bridge.cssid-unrestricted'/>
   <flag name='vfio-ccw'/>
   <flag name='sdl-gl'/>
+  <flag name='chardev-fd-pass'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>0</microcodeVersion>
diff --git a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
index 4247afeb31..c9846ba45a 100644
--- a/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
+++ b/tests/qemucapabilitiesdata/caps_2.12.0.x86_64.xml
@@ -200,6 +200,7 @@
   <flag name='qom-list-properties'/>
   <flag name='memory-backend-file.discard-data'/>
   <flag name='sdl-gl'/>
+  <flag name='chardev-fd-pass'/>
   <version>2011090</version>
   <kvmVersion>0</kvmVersion>
   <microcodeVersion>390813</microcodeVersion>
-- 
2.17.0

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