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qdev-properties: add size32 property type

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Introduce size32 property type which handles size suffixes (k, m, g)
just like size property, but is uint32_t rather than uint64_t.  It's
going to be useful for properties that are byte sizes but are inherently
32bit, like BlkConf.opt_io_size or .discard_granularity (they are
switched to this new property type in a followup commit).

The getter for size32 is left out for a separate patch as its benefit is
less obvious, and it affects test output; for now the regular uint32
getter is used.

Signed-off-by: Roman Kagan <rvkagan@yandex-team.ru>
Message-Id: <20200528225516.1676602-5-rvkagan@yandex-team.ru>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Roman Kagan 2020-05-29 01:55:12 +03:00 • committed by Kevin Wolf
parent a345c55236
commit 914e74cda9
2 changed files with 43 additions and 0 deletions
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40
hw/core/qdev-properties.c
View file

@ -727,6 +727,46 @@ const PropertyInfo qdev_prop_pci_devfn = {
.set_default_value = set_default_value_int,
};
/* --- 32bit unsigned int 'size' type --- */
static void set_size32(Object *obj, Visitor *v, const char *name, void *opaque,
Error **errp)
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
uint32_t *ptr = qdev_get_prop_ptr(dev, prop);
uint64_t value;
Error *local_err = NULL;
if (dev->realized) {
qdev_prop_set_after_realize(dev, name, errp);
return;
}
visit_type_size(v, name, &value, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (value > UINT32_MAX) {
error_setg(errp,
"Property %s.%s doesn't take value %" PRIu64
" (maximum: %u)",
dev->id ? : "", name, value, UINT32_MAX);
return;
}
*ptr = value;
}
const PropertyInfo qdev_prop_size32 = {
.name = "size",
.get = get_uint32,
.set = set_size32,
.set_default_value = set_default_value_uint,
};
/* --- blocksize --- */
/* lower limit is sector size */