qemu/hw/core/qdev-properties-system.c

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/*
* qdev property parsing and global properties
* (parts specific for qemu-system-*)
*
* This file is based on code from hw/qdev-properties.c from
* commit 074a86fccd185616469dfcdc0e157f438aebba18,
* Copyright (c) Gerd Hoffmann <kraxel@redhat.com> and other contributors.
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "net/net.h"
#include "hw/qdev.h"
#include "qapi/qmp/qerror.h"
#include "sysemu/blockdev.h"
#include "hw/block/block.h"
#include "net/hub.h"
#include "qapi/visitor.h"
#include "sysemu/char.h"
#include "sysemu/iothread.h"
static void get_pointer(Object *obj, Visitor *v, Property *prop,
char *(*print)(void *ptr),
const char *name, Error **errp)
{
DeviceState *dev = DEVICE(obj);
void **ptr = qdev_get_prop_ptr(dev, prop);
char *p;
p = *ptr ? print(*ptr) : g_strdup("");
visit_type_str(v, &p, name, errp);
g_free(p);
}
static void set_pointer(Object *obj, Visitor *v, Property *prop,
int (*parse)(DeviceState *dev, const char *str,
void **ptr),
const char *name, Error **errp)
{
DeviceState *dev = DEVICE(obj);
Error *local_err = NULL;
void **ptr = qdev_get_prop_ptr(dev, prop);
char *str;
int ret;
if (dev->realized) {
qdev_prop_set_after_realize(dev, name, errp);
return;
}
visit_type_str(v, &str, name, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (!*str) {
g_free(str);
*ptr = NULL;
return;
}
ret = parse(dev, str, ptr);
error_set_from_qdev_prop_error(errp, ret, dev, prop, str);
g_free(str);
}
/* --- drive --- */
static int parse_drive(DeviceState *dev, const char *str, void **ptr)
{
BlockDriverState *bs;
bs = bdrv_find(str);
if (bs == NULL) {
return -ENOENT;
}
if (bdrv_attach_dev(bs, dev) < 0) {
return -EEXIST;
}
*ptr = bs;
return 0;
}
static void release_drive(Object *obj, const char *name, void *opaque)
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
BlockDriverState **ptr = qdev_get_prop_ptr(dev, prop);
if (*ptr) {
bdrv_detach_dev(*ptr, dev);
blockdev_auto_del(*ptr);
}
}
static char *print_drive(void *ptr)
{
return g_strdup(bdrv_get_device_name(ptr));
}
static void get_drive(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
get_pointer(obj, v, opaque, print_drive, name, errp);
}
static void set_drive(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
set_pointer(obj, v, opaque, parse_drive, name, errp);
}
PropertyInfo qdev_prop_drive = {
.name = "str",
.legacy_name = "drive",
.get = get_drive,
.set = set_drive,
.release = release_drive,
};
/* --- character device --- */
static int parse_chr(DeviceState *dev, const char *str, void **ptr)
{
CharDriverState *chr = qemu_chr_find(str);
if (chr == NULL) {
return -ENOENT;
}
if (qemu_chr_fe_claim(chr) != 0) {
return -EEXIST;
}
*ptr = chr;
return 0;
}
static void release_chr(Object *obj, const char *name, void *opaque)
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
CharDriverState *chr = *ptr;
if (chr) {
qemu_chr_add_handlers(chr, NULL, NULL, NULL, NULL);
qemu_chr_fe_release(chr);
}
}
static char *print_chr(void *ptr)
{
CharDriverState *chr = ptr;
const char *val = chr->label ? chr->label : "";
return g_strdup(val);
}
static void get_chr(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
get_pointer(obj, v, opaque, print_chr, name, errp);
}
static void set_chr(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
set_pointer(obj, v, opaque, parse_chr, name, errp);
}
PropertyInfo qdev_prop_chr = {
.name = "str",
.legacy_name = "chr",
.get = get_chr,
.set = set_chr,
.release = release_chr,
};
/* --- netdev device --- */
static int parse_netdev(DeviceState *dev, const char *str, void **ptr)
{
NICPeers *peers_ptr = (NICPeers *)ptr;
NICConf *conf = container_of(peers_ptr, NICConf, peers);
NetClientState **ncs = peers_ptr->ncs;
NetClientState *peers[MAX_QUEUE_NUM];
int queues, i = 0;
int ret;
queues = qemu_find_net_clients_except(str, peers,
NET_CLIENT_OPTIONS_KIND_NIC,
MAX_QUEUE_NUM);
if (queues == 0) {
ret = -ENOENT;
goto err;
}
if (queues > MAX_QUEUE_NUM) {
ret = -E2BIG;
goto err;
}
for (i = 0; i < queues; i++) {
if (peers[i] == NULL) {
ret = -ENOENT;
goto err;
}
if (peers[i]->peer) {
ret = -EEXIST;
goto err;
}
if (ncs[i]) {
ret = -EINVAL;
goto err;
}
ncs[i] = peers[i];
ncs[i]->queue_index = i;
}
conf->queues = queues;
return 0;
err:
return ret;
}
static char *print_netdev(void *ptr)
{
NetClientState *netdev = ptr;
const char *val = netdev->name ? netdev->name : "";
return g_strdup(val);
}
static void get_netdev(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
get_pointer(obj, v, opaque, print_netdev, name, errp);
}
static void set_netdev(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
set_pointer(obj, v, opaque, parse_netdev, name, errp);
}
PropertyInfo qdev_prop_netdev = {
.name = "str",
.legacy_name = "netdev",
.get = get_netdev,
.set = set_netdev,
};
/* --- vlan --- */
static int print_vlan(DeviceState *dev, Property *prop, char *dest, size_t len)
{
NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
if (*ptr) {
int id;
if (!net_hub_id_for_client(*ptr, &id)) {
return snprintf(dest, len, "%d", id);
}
}
return snprintf(dest, len, "<null>");
}
static void get_vlan(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
int32_t id = -1;
if (*ptr) {
int hub_id;
if (!net_hub_id_for_client(*ptr, &hub_id)) {
id = hub_id;
}
}
visit_type_int32(v, &id, name, errp);
}
static void set_vlan(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
NetClientState **ptr = &peers_ptr->ncs[0];
Error *local_err = NULL;
int32_t id;
NetClientState *hubport;
if (dev->realized) {
qdev_prop_set_after_realize(dev, name, errp);
return;
}
visit_type_int32(v, &id, name, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
if (id == -1) {
*ptr = NULL;
return;
}
if (*ptr) {
error_set_from_qdev_prop_error(errp, -EINVAL, dev, prop, name);
return;
}
hubport = net_hub_port_find(id);
if (!hubport) {
error_set(errp, QERR_INVALID_PARAMETER_VALUE,
name, prop->info->name);
return;
}
*ptr = hubport;
}
PropertyInfo qdev_prop_vlan = {
.name = "int32",
.legacy_name = "vlan",
.print = print_vlan,
.get = get_vlan,
.set = set_vlan,
};
int qdev_prop_set_drive(DeviceState *dev, const char *name,
BlockDriverState *value)
{
Error *err = NULL;
const char *bdrv_name = value ? bdrv_get_device_name(value) : "";
object_property_set_str(OBJECT(dev), bdrv_name,
name, &err);
if (err) {
qerror_report_err(err);
error_free(err);
return -1;
}
return 0;
}
void qdev_prop_set_drive_nofail(DeviceState *dev, const char *name,
BlockDriverState *value)
{
if (qdev_prop_set_drive(dev, name, value) < 0) {
exit(1);
}
}
void qdev_prop_set_chr(DeviceState *dev, const char *name,
CharDriverState *value)
{
assert(!value || value->label);
object_property_set_str(OBJECT(dev),
value ? value->label : "", name, &error_abort);
}
void qdev_prop_set_netdev(DeviceState *dev, const char *name,
NetClientState *value)
{
assert(!value || value->name);
object_property_set_str(OBJECT(dev),
value ? value->name : "", name, &error_abort);
}
void qdev_set_nic_properties(DeviceState *dev, NICInfo *nd)
{
qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
if (nd->netdev) {
qdev_prop_set_netdev(dev, "netdev", nd->netdev);
}
if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
object_property_find(OBJECT(dev), "vectors", NULL)) {
qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
}
nd->instantiated = 1;
}
/* --- iothread --- */
static char *print_iothread(void *ptr)
{
return iothread_get_id(ptr);
}
static int parse_iothread(DeviceState *dev, const char *str, void **ptr)
{
IOThread *iothread;
iothread = iothread_find(str);
if (!iothread) {
return -ENOENT;
}
object_ref(OBJECT(iothread));
*ptr = iothread;
return 0;
}
static void get_iothread(Object *obj, struct Visitor *v, void *opaque,
const char *name, Error **errp)
{
get_pointer(obj, v, opaque, print_iothread, name, errp);
}
static void set_iothread(Object *obj, struct Visitor *v, void *opaque,
const char *name, Error **errp)
{
set_pointer(obj, v, opaque, parse_iothread, name, errp);
}
static void release_iothread(Object *obj, const char *name, void *opaque)
{
DeviceState *dev = DEVICE(obj);
Property *prop = opaque;
IOThread **ptr = qdev_get_prop_ptr(dev, prop);
if (*ptr) {
object_unref(OBJECT(*ptr));
}
}
PropertyInfo qdev_prop_iothread = {
.name = "iothread",
.get = get_iothread,
.set = set_iothread,
.release = release_iothread,
};
static int qdev_add_one_global(QemuOpts *opts, void *opaque)
{
GlobalProperty *g;
g = g_malloc0(sizeof(*g));
g->driver = qemu_opt_get(opts, "driver");
g->property = qemu_opt_get(opts, "property");
g->value = qemu_opt_get(opts, "value");
qdev_prop_register_global(g);
return 0;
}
void qemu_add_globals(void)
{
qemu_opts_foreach(qemu_find_opts("global"), qdev_add_one_global, NULL, 0);
}