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