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qom: move user_creatable_add_opts logic to vl.c and QAPIfy it 

Emulators are currently using OptsVisitor (via user_creatable_add_opts)
to parse the -object command line option.  This has one extra feature,
compared to keyval, which is automatic conversion of integers to lists
as well as support for lists as repeated options:

  -object memory-backend-ram,id=pc.ram,size=1048576000,host-nodes=0,policy=bind

So we cannot replace OptsVisitor with keyval right now.  Still, this
patch moves the user_creatable_add_opts logic to vl.c since it is
not needed anywhere else, and makes it go through user_creatable_add_qapi.

In order to minimize code changes, the predicate still takes a string.
This can be changed later to use the ObjectType QAPI enum directly.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210312173547.1283477-3-pbonzini@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Paolo Bonzini 2021-03-12 12:35:46 -05:00 committed by Kevin Wolf
parent 53c9956d8b
commit bc2f4fcb1d
3 changed files with 57 additions and 119 deletions
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47
include/qom/object_interfaces.h
View File

@ -94,56 +94,9 @@ Object *user_creatable_add_type(const char *type, const char *id,
*
* Create an instance of the user creatable object according to the
* options passed in @opts as described in the QAPI schema documentation.
*
* Returns: the newly created object or NULL on error
*/
void user_creatable_add_qapi(ObjectOptions *options, Error **errp);
/**
* user_creatable_add_opts:
* @opts: the object definition
* @errp: if an error occurs, a pointer to an area to store the error
*
* Create an instance of the user creatable object whose type
* is defined in @opts by the 'qom-type' option, placing it
* in the object composition tree with name provided by the
* 'id' field. The remaining options in @opts are used to
* initialize the object properties.
*
* Returns: the newly created object or NULL on error
*/
Object *user_creatable_add_opts(QemuOpts *opts, Error **errp);
/**
* user_creatable_add_opts_predicate:
* @type: the QOM type to be added
*
* A callback function to determine whether an object
* of type @type should be created. Instances of this
* callback should be passed to user_creatable_add_opts_foreach
*/
typedef bool (*user_creatable_add_opts_predicate)(const char *type);
/**
* user_creatable_add_opts_foreach:
* @opaque: a user_creatable_add_opts_predicate callback or NULL
* @opts: options to create
* @errp: unused
*
* An iterator callback to be used in conjunction with
* the qemu_opts_foreach() method for creating a list of
* objects from a set of QemuOpts
*
* The @opaque parameter can be passed a user_creatable_add_opts_predicate
* callback to filter which types of object are created during iteration.
* When it fails, report the error.
*
* Returns: 0 on success, -1 when an error was reported.
*/
int user_creatable_add_opts_foreach(void *opaque,
QemuOpts *opts, Error **errp);
/**
* user_creatable_parse_str:
* @optarg: the object definition string as passed on the command line

54
qom/object_interfaces.c
View File

@ -141,60 +141,6 @@ void user_creatable_add_qapi(ObjectOptions *options, Error **errp)
visit_free(v);
}
Object *user_creatable_add_opts(QemuOpts *opts, Error **errp)
{
Visitor *v;
QDict *pdict;
Object *obj;
const char *id = qemu_opts_id(opts);
char *type = qemu_opt_get_del(opts, "qom-type");
if (!type) {
error_setg(errp, QERR_MISSING_PARAMETER, "qom-type");
return NULL;
}
if (!id) {
error_setg(errp, QERR_MISSING_PARAMETER, "id");
qemu_opt_set(opts, "qom-type", type, &error_abort);
g_free(type);
return NULL;
}
qemu_opts_set_id(opts, NULL);
pdict = qemu_opts_to_qdict(opts, NULL);
v = opts_visitor_new(opts);
obj = user_creatable_add_type(type, id, pdict, v, errp);
visit_free(v);
qemu_opts_set_id(opts, (char *) id);
qemu_opt_set(opts, "qom-type", type, &error_abort);
g_free(type);
qobject_unref(pdict);
return obj;
}
int user_creatable_add_opts_foreach(void *opaque, QemuOpts *opts, Error **errp)
{
bool (*type_opt_predicate)(const char *, QemuOpts *) = opaque;
Object *obj = NULL;
const char *type;
type = qemu_opt_get(opts, "qom-type");
if (type && type_opt_predicate &&
!type_opt_predicate(type, opts)) {
return 0;
}
obj = user_creatable_add_opts(opts, errp);
if (!obj) {
return -1;
}
object_unref(obj);
return 0;
}
char *object_property_help(const char *name, const char *type,
QObject *defval, const char *description)
{

75
softmmu/vl.c
View File

@ -117,6 +117,7 @@
#include "qapi/qapi-commands-block-core.h"
#include "qapi/qapi-commands-migration.h"
#include "qapi/qapi-commands-misc.h"
#include "qapi/qapi-visit-qom.h"
#include "qapi/qapi-commands-ui.h"
#include "qapi/qmp/qerror.h"
#include "sysemu/iothread.h"
@ -132,10 +133,16 @@ typedef struct BlockdevOptionsQueueEntry {
typedef QSIMPLEQ_HEAD(, BlockdevOptionsQueueEntry) BlockdevOptionsQueue;
typedef struct ObjectOption {
ObjectOptions *opts;
QTAILQ_ENTRY(ObjectOption) next;
} ObjectOption;
static const char *cpu_option;
static const char *mem_path;
static const char *incoming;
static const char *loadvm;
static QTAILQ_HEAD(, ObjectOption) object_opts = QTAILQ_HEAD_INITIALIZER(object_opts);
static ram_addr_t maxram_size;
static uint64_t ram_slots;
static int display_remote;
@ -1683,6 +1690,50 @@ static int machine_set_property(void *opaque,
return object_parse_property_opt(opaque, name, value, "type", errp);
}
static void object_option_foreach_add(bool (*type_opt_predicate)(const char *))
{
ObjectOption *opt, *next;
QTAILQ_FOREACH_SAFE(opt, &object_opts, next, next) {
const char *type = ObjectType_str(opt->opts->qom_type);
if (type_opt_predicate(type)) {
user_creatable_add_qapi(opt->opts, &error_fatal);
qapi_free_ObjectOptions(opt->opts);
QTAILQ_REMOVE(&object_opts, opt, next);
g_free(opt);
}
}
}
static void object_option_parse(const char *optarg)
{
ObjectOption *opt;
QemuOpts *opts;
const char *type;
Visitor *v;
opts = qemu_opts_parse_noisily(qemu_find_opts("object"),
optarg, true);
if (!opts) {
exit(1);
}
type = qemu_opt_get(opts, "qom-type");
if (!type) {
error_setg(&error_fatal, QERR_MISSING_PARAMETER, "qom-type");
}
if (user_creatable_print_help(type, opts)) {
exit(0);
}
opt = g_new0(ObjectOption, 1);
v = opts_visitor_new(opts);
visit_type_ObjectOptions(v, NULL, &opt->opts, &error_fatal);
visit_free(v);
QTAILQ_INSERT_TAIL(&object_opts, opt, next);
}
/*
* Initial object creation happens before all other
* QEMU data types are created. The majority of objects
@ -1690,12 +1741,8 @@ static int machine_set_property(void *opaque,
* cannot be created here, as it depends on the chardev
* already existing.
*/
static bool object_create_early(const char *type, QemuOpts *opts)
static bool object_create_early(const char *type)
{
if (user_creatable_print_help(type, opts)) {
exit(0);
}
/*
* Objects should not be made "delayed" without a reason. If you
* add one, state the reason in a comment!
@ -1814,9 +1861,7 @@ static void qemu_create_early_backends(void)
exit(1);
}
qemu_opts_foreach(qemu_find_opts("object"),
user_creatable_add_opts_foreach,
object_create_early, &error_fatal);
object_option_foreach_add(object_create_early);
/* spice needs the timers to be initialized by this point */
/* spice must initialize before audio as it changes the default auiodev */
@ -1845,9 +1890,9 @@ static void qemu_create_early_backends(void)
* The remainder of object creation happens after the
* creation of chardev, fsdev, net clients and device data types.
*/
static bool object_create_late(const char *type, QemuOpts *opts)
static bool object_create_late(const char *type)
{
return !object_create_early(type, opts);
return !object_create_early(type);
}
static void qemu_create_late_backends(void)
@ -1858,9 +1903,7 @@ static void qemu_create_late_backends(void)
net_init_clients(&error_fatal);
qemu_opts_foreach(qemu_find_opts("object"),
user_creatable_add_opts_foreach,
object_create_late, &error_fatal);
object_option_foreach_add(object_create_late);
if (tpm_init() < 0) {
exit(1);
@ -3395,11 +3438,7 @@ void qemu_init(int argc, char **argv, char **envp)
#endif
break;
case QEMU_OPTION_object:
opts = qemu_opts_parse_noisily(qemu_find_opts("object"),
optarg, true);
if (!opts) {
exit(1);
}
object_option_parse(optarg);
break;
case QEMU_OPTION_overcommit:
opts = qemu_opts_parse_noisily(qemu_find_opts("overcommit"),