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qapi: add query-display-options command

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Add query-display-options command, which allows querying the qemu
display configuration.  This isn't particularly useful, except it
exposes QAPI type DisplayOptions in query-qmp-schema, so that libvirt
can discover recently added -display parameter rendernode (commit
d4dc4ab133b).  Works around lack of sufficiently powerful command line
introspection.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Tested-by: Eric Blake <eblake@redhat.com>
Tested-by: Erik Skultety <eskultet@redhat.com>
Message-id: 20181122071613.2889-1-kraxel@redhat.com

[ kraxel: reworded commit message as suggested by armbru ]
This commit is contained in:
Gerd Hoffmann 2018-11-22 08:16:13 +01:00
parent 933d2d4bf2
commit e1ca8f7e19
2 changed files with 19 additions and 0 deletions
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13
qapi/ui.json
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@ -1102,3 +1102,16 @@
'discriminator' : 'type', 'discriminator' : 'type',
'data' : { 'gtk' : 'DisplayGTK', 'data' : { 'gtk' : 'DisplayGTK',
'egl-headless' : 'DisplayEGLHeadless'} } 'egl-headless' : 'DisplayEGLHeadless'} }
##
# @query-display-options:
#
# Returns information about display configuration
#
# Returns: @DisplayOptions
#
# Since: 3.1
#
##
{ 'command': 'query-display-options',
'returns': 'DisplayOptions' }

6
vl.c
View File

@ -128,6 +128,7 @@ int main(int argc, char **argv)
#include "qapi/qapi-commands-block-core.h" #include "qapi/qapi-commands-block-core.h"
#include "qapi/qapi-commands-misc.h" #include "qapi/qapi-commands-misc.h"
#include "qapi/qapi-commands-run-state.h" #include "qapi/qapi-commands-run-state.h"
#include "qapi/qapi-commands-ui.h"
#include "qapi/qmp/qerror.h" #include "qapi/qmp/qerror.h"
#include "sysemu/iothread.h" #include "sysemu/iothread.h"
@ -2055,6 +2056,11 @@ static void parse_display_qapi(const char *optarg)
visit_free(v); visit_free(v);
} }
DisplayOptions *qmp_query_display_options(Error **errp)
{
return QAPI_CLONE(DisplayOptions, &dpy);
}
static void parse_display(const char *p) static void parse_display(const char *p)
{ {
const char *opts; const char *opts;