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qemu-storage-daemon: Add --object option 

Add a command line option to create user-creatable QOM objects.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Message-Id: <20200224143008.13362-9-kwolf@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Kevin Wolf 2020-02-24 15:29:56 +01:00
parent 5f07c4d60d
commit d6da78b5fd
3 changed files with 49 additions and 1 deletions
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2
Makefile.objs
View File

@ -31,7 +31,7 @@ endif # CONFIG_SOFTMMU or CONFIG_TOOLS
# storage-daemon-obj-y is code used by qemu-storage-daemon (these objects are
# used for system emulation, too, but specified separately there)
storage-daemon-obj-y = block/
storage-daemon-obj-y = block/ qom/
storage-daemon-obj-y += blockdev.o iothread.o
######################################################################

47
qemu-storage-daemon.c
View File

@ -33,15 +33,19 @@
#include "qapi/error.h"
#include "qapi/qapi-visit-block-core.h"
#include "qapi/qapi-commands-block-core.h"
#include "qapi/qmp/qdict.h"
#include "qapi/qobject-input-visitor.h"
#include "qemu-common.h"
#include "qemu-version.h"
#include "qemu/config-file.h"
#include "qemu/error-report.h"
#include "qemu/help_option.h"
#include "qemu/log.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "qemu/option.h"
#include "qom/object_interfaces.h"
#include "trace/control.h"
@ -63,12 +67,31 @@ static void help(void)
" [,driver specific parameters...]\n"
" configure a block backend\n"
"\n"
" --object help list object types that can be added\n"
" --object <type>,help list properties for the given object type\n"
" --object <type>[,<property>=<value>...]\n"
" create a new object of type <type>, setting\n"
" properties in the order they are specified. Note\n"
" that the 'id' property must be set.\n"
" See the qemu(1) man page for documentation of the\n"
" objects that can be added.\n"
"\n"
QEMU_HELP_BOTTOM "\n",
error_get_progname());
}
enum {
OPTION_BLOCKDEV = 256,
OPTION_OBJECT,
};
static QemuOptsList qemu_object_opts = {
.name = "object",
.implied_opt_name = "qom-type",
.head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head),
.desc = {
{ }
},
};
static void process_options(int argc, char *argv[])
@ -78,6 +101,7 @@ static void process_options(int argc, char *argv[])
static const struct option long_options[] = {
{"blockdev", required_argument, NULL, OPTION_BLOCKDEV},
{"help", no_argument, NULL, 'h'},
{"object", required_argument, NULL, OPTION_OBJECT},
{"trace", required_argument, NULL, 'T'},
{"version", no_argument, NULL, 'V'},
{0, 0, 0, 0}
@ -121,6 +145,29 @@ static void process_options(int argc, char *argv[])
qapi_free_BlockdevOptions(options);
break;
}
case OPTION_OBJECT:
{
QemuOpts *opts;
const char *type;
QDict *args;
QObject *ret_data = NULL;
/* FIXME The keyval parser rejects 'help' arguments, so we must
* unconditionall try QemuOpts first. */
opts = qemu_opts_parse(&qemu_object_opts,
optarg, true, &error_fatal);
type = qemu_opt_get(opts, "qom-type");
if (type && user_creatable_print_help(type, opts)) {
exit(EXIT_SUCCESS);
}
qemu_opts_del(opts);
args = keyval_parse(optarg, "qom-type", &error_fatal);
qmp_object_add(args, &ret_data, &error_fatal);
qobject_unref(args);
qobject_unref(ret_data);
break;
}
default:
g_assert_not_reached();
}

1
qom/Makefile.objs
View File

@ -2,3 +2,4 @@ qom-obj-y = object.o container.o qom-qobject.o
qom-obj-y += object_interfaces.o
common-obj-$(CONFIG_SOFTMMU) += qom-hmp-cmds.o qom-qmp-cmds.o
storage-daemon-obj-y += qom-qmp-cmds.o