467 lines
12 KiB
C
467 lines
12 KiB
C
/*
|
|
* qdev property parsing
|
|
* (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 "qemu/osdep.h"
|
|
#include "audio/audio.h"
|
|
#include "net/net.h"
|
|
#include "hw/qdev-properties.h"
|
|
#include "qapi/error.h"
|
|
#include "qapi/qmp/qerror.h"
|
|
#include "sysemu/block-backend.h"
|
|
#include "sysemu/blockdev.h"
|
|
#include "hw/block/block.h"
|
|
#include "net/hub.h"
|
|
#include "qapi/visitor.h"
|
|
#include "chardev/char-fe.h"
|
|
#include "sysemu/iothread.h"
|
|
#include "sysemu/tpm_backend.h"
|
|
|
|
static bool check_prop_still_unset(DeviceState *dev, const char *name,
|
|
const void *old_val, const char *new_val,
|
|
Error **errp)
|
|
{
|
|
const GlobalProperty *prop = qdev_find_global_prop(dev, name);
|
|
|
|
if (!old_val) {
|
|
return true;
|
|
}
|
|
|
|
if (prop) {
|
|
error_setg(errp, "-global %s.%s=... conflicts with %s=%s",
|
|
prop->driver, prop->property, name, new_val);
|
|
} else {
|
|
/* Error message is vague, but a better one would be hard */
|
|
error_setg(errp, "%s=%s conflicts, and override is not implemented",
|
|
name, new_val);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
/* --- drive --- */
|
|
|
|
static void get_drive(Object *obj, Visitor *v, const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
void **ptr = qdev_get_prop_ptr(dev, prop);
|
|
const char *value;
|
|
char *p;
|
|
|
|
if (*ptr) {
|
|
value = blk_name(*ptr);
|
|
if (!*value) {
|
|
BlockDriverState *bs = blk_bs(*ptr);
|
|
if (bs) {
|
|
value = bdrv_get_node_name(bs);
|
|
}
|
|
}
|
|
} else {
|
|
value = "";
|
|
}
|
|
|
|
p = g_strdup(value);
|
|
visit_type_str(v, name, &p, errp);
|
|
g_free(p);
|
|
}
|
|
|
|
static void set_drive_helper(Object *obj, Visitor *v, const char *name,
|
|
void *opaque, bool iothread, Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
void **ptr = qdev_get_prop_ptr(dev, prop);
|
|
char *str;
|
|
BlockBackend *blk;
|
|
bool blk_created = false;
|
|
int ret;
|
|
|
|
if (dev->realized) {
|
|
qdev_prop_set_after_realize(dev, name, errp);
|
|
return;
|
|
}
|
|
|
|
if (!visit_type_str(v, name, &str, errp)) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* TODO Should this really be an error? If no, the old value
|
|
* needs to be released before we store the new one.
|
|
*/
|
|
if (!check_prop_still_unset(dev, name, *ptr, str, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (!*str) {
|
|
g_free(str);
|
|
*ptr = NULL;
|
|
return;
|
|
}
|
|
|
|
blk = blk_by_name(str);
|
|
if (!blk) {
|
|
BlockDriverState *bs = bdrv_lookup_bs(NULL, str, NULL);
|
|
if (bs) {
|
|
/*
|
|
* If the device supports iothreads, it will make sure to move the
|
|
* block node to the right AioContext if necessary (or fail if this
|
|
* isn't possible because of other users). Devices that are not
|
|
* aware of iothreads require their BlockBackends to be in the main
|
|
* AioContext.
|
|
*/
|
|
AioContext *ctx = iothread ? bdrv_get_aio_context(bs) :
|
|
qemu_get_aio_context();
|
|
blk = blk_new(ctx, 0, BLK_PERM_ALL);
|
|
blk_created = true;
|
|
|
|
ret = blk_insert_bs(blk, bs, errp);
|
|
if (ret < 0) {
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
if (!blk) {
|
|
error_setg(errp, "Property '%s.%s' can't find value '%s'",
|
|
object_get_typename(OBJECT(dev)), prop->name, str);
|
|
goto fail;
|
|
}
|
|
if (blk_attach_dev(blk, dev) < 0) {
|
|
DriveInfo *dinfo = blk_legacy_dinfo(blk);
|
|
|
|
if (dinfo && dinfo->type != IF_NONE) {
|
|
error_setg(errp, "Drive '%s' is already in use because "
|
|
"it has been automatically connected to another "
|
|
"device (did you need 'if=none' in the drive options?)",
|
|
str);
|
|
} else {
|
|
error_setg(errp, "Drive '%s' is already in use by another device",
|
|
str);
|
|
}
|
|
goto fail;
|
|
}
|
|
|
|
*ptr = blk;
|
|
|
|
fail:
|
|
if (blk_created) {
|
|
/* If we need to keep a reference, blk_attach_dev() took it */
|
|
blk_unref(blk);
|
|
}
|
|
|
|
g_free(str);
|
|
}
|
|
|
|
static void set_drive(Object *obj, Visitor *v, const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
set_drive_helper(obj, v, name, opaque, false, errp);
|
|
}
|
|
|
|
static void set_drive_iothread(Object *obj, Visitor *v, const char *name,
|
|
void *opaque, Error **errp)
|
|
{
|
|
set_drive_helper(obj, v, name, opaque, true, errp);
|
|
}
|
|
|
|
static void release_drive(Object *obj, const char *name, void *opaque)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
BlockBackend **ptr = qdev_get_prop_ptr(dev, prop);
|
|
|
|
if (*ptr) {
|
|
AioContext *ctx = blk_get_aio_context(*ptr);
|
|
|
|
aio_context_acquire(ctx);
|
|
blockdev_auto_del(*ptr);
|
|
blk_detach_dev(*ptr, dev);
|
|
aio_context_release(ctx);
|
|
}
|
|
}
|
|
|
|
const PropertyInfo qdev_prop_drive = {
|
|
.name = "str",
|
|
.description = "Node name or ID of a block device to use as a backend",
|
|
.get = get_drive,
|
|
.set = set_drive,
|
|
.release = release_drive,
|
|
};
|
|
|
|
const PropertyInfo qdev_prop_drive_iothread = {
|
|
.name = "str",
|
|
.description = "Node name or ID of a block device to use as a backend",
|
|
.get = get_drive,
|
|
.set = set_drive_iothread,
|
|
.release = release_drive,
|
|
};
|
|
|
|
/* --- character device --- */
|
|
|
|
static void get_chr(Object *obj, Visitor *v, const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
CharBackend *be = qdev_get_prop_ptr(dev, opaque);
|
|
char *p;
|
|
|
|
p = g_strdup(be->chr && be->chr->label ? be->chr->label : "");
|
|
visit_type_str(v, name, &p, errp);
|
|
g_free(p);
|
|
}
|
|
|
|
static void set_chr(Object *obj, Visitor *v, const char *name, void *opaque,
|
|
Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
CharBackend *be = qdev_get_prop_ptr(dev, prop);
|
|
Chardev *s;
|
|
char *str;
|
|
|
|
if (dev->realized) {
|
|
qdev_prop_set_after_realize(dev, name, errp);
|
|
return;
|
|
}
|
|
|
|
if (!visit_type_str(v, name, &str, errp)) {
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* TODO Should this really be an error? If no, the old value
|
|
* needs to be released before we store the new one.
|
|
*/
|
|
if (!check_prop_still_unset(dev, name, be->chr, str, errp)) {
|
|
return;
|
|
}
|
|
|
|
if (!*str) {
|
|
g_free(str);
|
|
be->chr = NULL;
|
|
return;
|
|
}
|
|
|
|
s = qemu_chr_find(str);
|
|
if (s == NULL) {
|
|
error_setg(errp, "Property '%s.%s' can't find value '%s'",
|
|
object_get_typename(obj), prop->name, str);
|
|
} else if (!qemu_chr_fe_init(be, s, errp)) {
|
|
error_prepend(errp, "Property '%s.%s' can't take value '%s': ",
|
|
object_get_typename(obj), prop->name, str);
|
|
}
|
|
g_free(str);
|
|
}
|
|
|
|
static void release_chr(Object *obj, const char *name, void *opaque)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
CharBackend *be = qdev_get_prop_ptr(dev, prop);
|
|
|
|
qemu_chr_fe_deinit(be, false);
|
|
}
|
|
|
|
const PropertyInfo qdev_prop_chr = {
|
|
.name = "str",
|
|
.description = "ID of a chardev to use as a backend",
|
|
.get = get_chr,
|
|
.set = set_chr,
|
|
.release = release_chr,
|
|
};
|
|
|
|
/* --- netdev device --- */
|
|
static void get_netdev(Object *obj, Visitor *v, const char *name,
|
|
void *opaque, Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
|
|
char *p = g_strdup(peers_ptr->ncs[0] ? peers_ptr->ncs[0]->name : "");
|
|
|
|
visit_type_str(v, name, &p, errp);
|
|
g_free(p);
|
|
}
|
|
|
|
static void set_netdev(Object *obj, Visitor *v, const char *name,
|
|
void *opaque, Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
|
|
NetClientState **ncs = peers_ptr->ncs;
|
|
NetClientState *peers[MAX_QUEUE_NUM];
|
|
int queues, err = 0, i = 0;
|
|
char *str;
|
|
|
|
if (dev->realized) {
|
|
qdev_prop_set_after_realize(dev, name, errp);
|
|
return;
|
|
}
|
|
|
|
if (!visit_type_str(v, name, &str, errp)) {
|
|
return;
|
|
}
|
|
|
|
queues = qemu_find_net_clients_except(str, peers,
|
|
NET_CLIENT_DRIVER_NIC,
|
|
MAX_QUEUE_NUM);
|
|
if (queues == 0) {
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
if (queues > MAX_QUEUE_NUM) {
|
|
error_setg(errp, "queues of backend '%s'(%d) exceeds QEMU limitation(%d)",
|
|
str, queues, MAX_QUEUE_NUM);
|
|
goto out;
|
|
}
|
|
|
|
for (i = 0; i < queues; i++) {
|
|
if (peers[i]->peer) {
|
|
err = -EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* TODO Should this really be an error? If no, the old value
|
|
* needs to be released before we store the new one.
|
|
*/
|
|
if (!check_prop_still_unset(dev, name, ncs[i], str, errp)) {
|
|
goto out;
|
|
}
|
|
|
|
ncs[i] = peers[i];
|
|
ncs[i]->queue_index = i;
|
|
}
|
|
|
|
peers_ptr->queues = queues;
|
|
|
|
out:
|
|
error_set_from_qdev_prop_error(errp, err, dev, prop, str);
|
|
g_free(str);
|
|
}
|
|
|
|
const PropertyInfo qdev_prop_netdev = {
|
|
.name = "str",
|
|
.description = "ID of a netdev to use as a backend",
|
|
.get = get_netdev,
|
|
.set = set_netdev,
|
|
};
|
|
|
|
|
|
/* --- audiodev --- */
|
|
static void get_audiodev(Object *obj, Visitor *v, const char* name,
|
|
void *opaque, Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
QEMUSoundCard *card = qdev_get_prop_ptr(dev, prop);
|
|
char *p = g_strdup(audio_get_id(card));
|
|
|
|
visit_type_str(v, name, &p, errp);
|
|
g_free(p);
|
|
}
|
|
|
|
static void set_audiodev(Object *obj, Visitor *v, const char* name,
|
|
void *opaque, Error **errp)
|
|
{
|
|
DeviceState *dev = DEVICE(obj);
|
|
Property *prop = opaque;
|
|
QEMUSoundCard *card = qdev_get_prop_ptr(dev, prop);
|
|
AudioState *state;
|
|
int err = 0;
|
|
char *str;
|
|
|
|
if (dev->realized) {
|
|
qdev_prop_set_after_realize(dev, name, errp);
|
|
return;
|
|
}
|
|
|
|
if (!visit_type_str(v, name, &str, errp)) {
|
|
return;
|
|
}
|
|
|
|
state = audio_state_by_name(str);
|
|
|
|
if (!state) {
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
card->state = state;
|
|
|
|
out:
|
|
error_set_from_qdev_prop_error(errp, err, dev, prop, str);
|
|
g_free(str);
|
|
}
|
|
|
|
const PropertyInfo qdev_prop_audiodev = {
|
|
.name = "str",
|
|
.description = "ID of an audiodev to use as a backend",
|
|
/* release done on shutdown */
|
|
.get = get_audiodev,
|
|
.set = set_audiodev,
|
|
};
|
|
|
|
bool qdev_prop_set_drive_err(DeviceState *dev, const char *name,
|
|
BlockBackend *value, Error **errp)
|
|
{
|
|
const char *ref = "";
|
|
|
|
if (value) {
|
|
ref = blk_name(value);
|
|
if (!*ref) {
|
|
const BlockDriverState *bs = blk_bs(value);
|
|
if (bs) {
|
|
ref = bdrv_get_node_name(bs);
|
|
}
|
|
}
|
|
}
|
|
|
|
return object_property_set_str(OBJECT(dev), name, ref, errp);
|
|
}
|
|
|
|
void qdev_prop_set_drive(DeviceState *dev, const char *name,
|
|
BlockBackend *value)
|
|
{
|
|
qdev_prop_set_drive_err(dev, name, value, &error_abort);
|
|
}
|
|
|
|
void qdev_prop_set_chr(DeviceState *dev, const char *name,
|
|
Chardev *value)
|
|
{
|
|
assert(!value || value->label);
|
|
object_property_set_str(OBJECT(dev), name, value ? value->label : "",
|
|
&error_abort);
|
|
}
|
|
|
|
void qdev_prop_set_netdev(DeviceState *dev, const char *name,
|
|
NetClientState *value)
|
|
{
|
|
assert(!value || value->name);
|
|
object_property_set_str(OBJECT(dev), name, value ? value->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;
|
|
}
|