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vl: list user creatable properties when 'help' is argument

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Iterate over the writable class properties, sort and print them out
with the description if available.

Ex: qemu -object memory-backend-file,help
memory-backend-file.align=int
memory-backend-file.discard-data=bool
memory-backend-file.dump=bool - Set to 'off' to exclude from core dump
memory-backend-file.host-nodes=int - Binds memory to the list of NUMA host nodes
memory-backend-file.mem-path=string
memory-backend-file.merge=bool - Mark memory as mergeable
memory-backend-file.pmem=bool
memory-backend-file.policy=HostMemPolicy - Set the NUMA policy
memory-backend-file.prealloc=bool - Preallocate memory
memory-backend-file.share=bool - Mark the memory as private to QEMU or shared
memory-backend-file.size=int - Size of the memory region (ex: 500M)

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Marc-André Lureau 2018-09-06 17:05:34 +04:00
parent 033bfc5e0e
commit 1195fa2b08
2 changed files with 40 additions and 6 deletions
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6
qom/object_interfaces.c
View file

@ -141,14 +141,14 @@ Object *user_creatable_add_opts(QemuOpts *opts, Error **errp)
int user_creatable_add_opts_foreach(void *opaque, QemuOpts *opts, Error **errp)
{
bool (*type_predicate)(const char *) = opaque;
bool (*type_opt_predicate)(const char *, QemuOpts *) = opaque;
Object *obj = NULL;
Error *err = NULL;
const char *type;
type = qemu_opt_get(opts, "qom-type");
if (type && type_predicate &&
!type_predicate(type)) {
if (type && type_opt_predicate &&
!type_opt_predicate(type, opts)) {
return 0;
}

40
vl.c
View file

@ -2696,8 +2696,10 @@ static int machine_set_property(void *opaque,
* cannot be created here, as it depends on the chardev
* already existing.
*/
static bool object_create_initial(const char *type)
static bool object_create_initial(const char *type, QemuOpts *opts)
{
ObjectClass *klass;
if (is_help_option(type)) {
GSList *l, *list;
@ -2711,6 +2713,38 @@ static bool object_create_initial(const char *type)
exit(0);
}
klass = object_class_by_name(type);
if (klass && qemu_opt_has_help_opt(opts)) {
ObjectPropertyIterator iter;
ObjectProperty *prop;
GPtrArray *array = g_ptr_array_new();
int i;
object_class_property_iter_init(&iter, klass);
while ((prop = object_property_iter_next(&iter))) {
GString *str;
if (!prop->set) {
continue;
}
str = g_string_new(NULL);
g_string_append_printf(str, "%s.%s=%s", type,
prop->name, prop->type);
if (prop->description) {
g_string_append_printf(str, " - %s", prop->description);
}
g_ptr_array_add(array, g_string_free(str, false));
}
g_ptr_array_sort(array, (GCompareFunc)qemu_pstrcmp0);
for (i = 0; i < array->len; i++) {
printf("%s\n", (char *)array->pdata[i]);
}
g_ptr_array_set_free_func(array, g_free);
g_ptr_array_free(array, true);
exit(0);
}
if (g_str_equal(type, "rng-egd") ||
g_str_has_prefix(type, "pr-manager-")) {
return false;
@ -2757,9 +2791,9 @@ static bool object_create_initial(const char *type)
* The remainder of object creation happens after the
* creation of chardev, fsdev, net clients and device data types.
*/
static bool object_create_delayed(const char *type)
static bool object_create_delayed(const char *type, QemuOpts *opts)
{
return !object_create_initial(type);
return !object_create_initial(type, opts);
}