[qemu.git] / hw / qdev-properties-system.c

/*
 * 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-common.h"
#include "net/hub.h"
#include "qapi/visitor.h"
#include "char/char.h"

static void get_pointer(Object *obj, Visitor *v, Property *prop,
                        const char *(*print)(void *ptr),
                        const char *name, Error **errp)
{
    DeviceState *dev = DEVICE(obj);
    void **ptr = qdev_get_prop_ptr(dev, prop);
    char *p;

    p = (char *) (*ptr ? print(*ptr) : "");
    visit_type_str(v, &p, name, errp);
}

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) {
        error_set(errp, QERR_PERMISSION_DENIED);
        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 const char *print_drive(void *ptr)
{
    return 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  = "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 (chr->avail_connections < 1) {
        return -EEXIST;
    }
    *ptr = chr;
    --chr->avail_connections;
    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);

    if (*ptr) {
        qemu_chr_add_handlers(*ptr, NULL, NULL, NULL, NULL);
    }
}


static const char *print_chr(void *ptr)
{
    CharDriverState *chr = ptr;

    return chr->label ? chr->label : "";
}

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  = "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;
        }

        ncs[i] = peers[i];
        ncs[i]->queue_index = i;
    }

    conf->queues = queues;

    return 0;

err:
    return ret;
}

static const char *print_netdev(void *ptr)
{
    NetClientState *netdev = ptr;

    return netdev->name ? netdev->name : "";
}

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  = "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) {
        error_set(errp, QERR_PERMISSION_DENIED);
        return;
    }

    visit_type_int32(v, &id, name, &local_err);
    if (local_err) {
        error_propagate(errp, local_err);
        return;
    }
    if (id == -1) {
        *ptr = NULL;
        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  = "vlan",
    .print = print_vlan,
    .get   = get_vlan,
    .set   = set_vlan,
};

int qdev_prop_set_drive(DeviceState *dev, const char *name,
                        BlockDriverState *value)
{
    Error *errp = NULL;
    const char *bdrv_name = value ? bdrv_get_device_name(value) : "";
    object_property_set_str(OBJECT(dev), bdrv_name,
                            name, &errp);
    if (errp) {
        qerror_report_err(errp);
        error_free(errp);
        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)
{
    Error *errp = NULL;
    assert(!value || value->label);
    object_property_set_str(OBJECT(dev),
                            value ? value->label : "", name, &errp);
    assert_no_error(errp);
}

void qdev_prop_set_netdev(DeviceState *dev, const char *name,
                          NetClientState *value)
{
    Error *errp = NULL;
    assert(!value || value->name);
    object_property_set_str(OBJECT(dev),
                            value ? value->name : "", name, &errp);
    assert_no_error(errp);
}

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;
}

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);
}
Commit	Line	Data
a404b612 EH	1	/*
	2	* qdev property parsing and global properties
	3	* (parts specific for qemu-system-*)
	4	*
	5	* This file is based on code from hw/qdev-properties.c from
	6	* commit 074a86fccd185616469dfcdc0e157f438aebba18,
	7	* Copyright (c) Gerd Hoffmann <kraxel@redhat.com> and other contributors.
	8	*
	9	* This work is licensed under the terms of the GNU GPL, version 2 or later.
	10	* See the COPYING file in the top-level directory.
	11	*/
	12
501a7ce7	13	#include "net/net.h"
83c9f4ca	14	#include "hw/qdev.h"
501a7ce7 AF	15	#include "qapi/qmp/qerror.h"
501a7ce7 AF	16	#include "sysemu/blockdev.h"
a404b612 EH	17	#include "hw/block-common.h"
a404b612 EH	18	#include "net/hub.h"
501a7ce7 AF	19	#include "qapi/visitor.h"
501a7ce7 AF	20	#include "char/char.h"
a404b612 EH	21
	22	static void get_pointer(Object obj, Visitor v, Property *prop,
	23	const char (print)(void *ptr),
	24	const char name, Error *errp)
	25	{
	26	DeviceState *dev = DEVICE(obj);
	27	void **ptr = qdev_get_prop_ptr(dev, prop);
	28	char *p;
	29
	30	p = (char ) (ptr ? print(*ptr) : "");
	31	visit_type_str(v, &p, name, errp);
	32	}
	33
	34	static void set_pointer(Object obj, Visitor v, Property *prop,
	35	int (parse)(DeviceState dev, const char *str,
	36	void **ptr),
	37	const char name, Error *errp)
	38	{
	39	DeviceState *dev = DEVICE(obj);
	40	Error *local_err = NULL;
	41	void **ptr = qdev_get_prop_ptr(dev, prop);
	42	char *str;
	43	int ret;
	44
7983c8a3	45	if (dev->realized) {
a404b612 EH	46	error_set(errp, QERR_PERMISSION_DENIED);
	47	return;
	48	}
	49
	50	visit_type_str(v, &str, name, &local_err);
	51	if (local_err) {
	52	error_propagate(errp, local_err);
	53	return;
	54	}
	55	if (!*str) {
	56	g_free(str);
	57	*ptr = NULL;
	58	return;
	59	}
	60	ret = parse(dev, str, ptr);
	61	error_set_from_qdev_prop_error(errp, ret, dev, prop, str);
	62	g_free(str);
	63	}
	64
	65	/* --- drive --- */
	66
	67	static int parse_drive(DeviceState dev, const char str, void **ptr)
	68	{
	69	BlockDriverState *bs;
	70
	71	bs = bdrv_find(str);
	72	if (bs == NULL) {
	73	return -ENOENT;
	74	}
	75	if (bdrv_attach_dev(bs, dev) < 0) {
	76	return -EEXIST;
	77	}
	78	*ptr = bs;
	79	return 0;
	80	}
	81
	82	static void release_drive(Object obj, const char name, void *opaque)
	83	{
	84	DeviceState *dev = DEVICE(obj);
	85	Property *prop = opaque;
	86	BlockDriverState **ptr = qdev_get_prop_ptr(dev, prop);
	87
	88	if (*ptr) {
	89	bdrv_detach_dev(*ptr, dev);
	90	blockdev_auto_del(*ptr);
	91	}
	92	}
	93
	94	static const char print_drive(void ptr)
	95	{
	96	return bdrv_get_device_name(ptr);
	97	}
	98
	99	static void get_drive(Object obj, Visitor v, void *opaque,
	100	const char name, Error *errp)
	101	{
	102	get_pointer(obj, v, opaque, print_drive, name, errp);
	103	}
	104
	105	static void set_drive(Object obj, Visitor v, void *opaque,
	106	const char name, Error *errp)
	107	{
	108	set_pointer(obj, v, opaque, parse_drive, name, errp);
	109	}
110
111	PropertyInfo qdev_prop_drive = {
112	.name = "drive",
113	.get = get_drive,
114	.set = set_drive,
115	.release = release_drive,
116	};
117
118	/* --- character device --- */
119
120	static int parse_chr(DeviceState dev, const char str, void **ptr)
121	{
122	CharDriverState *chr = qemu_chr_find(str);
123	if (chr == NULL) {
124	return -ENOENT;
125	}
126	if (chr->avail_connections < 1) {
127	return -EEXIST;
128	}
129	*ptr = chr;
130	--chr->avail_connections;
131	return 0;
132	}
133
134	static void release_chr(Object obj, const char name, void *opaque)
135	{
136	DeviceState *dev = DEVICE(obj);
137	Property *prop = opaque;
138	CharDriverState **ptr = qdev_get_prop_ptr(dev, prop);
139
140	if (*ptr) {
141	qemu_chr_add_handlers(*ptr, NULL, NULL, NULL, NULL);
142	}
143	}
144
145
146	static const char print_chr(void ptr)
147	{
148	CharDriverState *chr = ptr;
149
150	return chr->label ? chr->label : "";
151	}
152
153	static void get_chr(Object obj, Visitor v, void *opaque,
154	const char name, Error *errp)
155	{
156	get_pointer(obj, v, opaque, print_chr, name, errp);
157	}
158
159	static void set_chr(Object obj, Visitor v, void *opaque,
160	const char name, Error *errp)
161	{
162	set_pointer(obj, v, opaque, parse_chr, name, errp);
163	}
164
165	PropertyInfo qdev_prop_chr = {
166	.name = "chr",
167	.get = get_chr,
168	.set = set_chr,
169	.release = release_chr,
170	};
171
172	/* --- netdev device --- */
173
174	static int parse_netdev(DeviceState dev, const char str, void **ptr)
175	{
1ceef9f2 JW	176	NICPeers peers_ptr = (NICPeers )ptr;
	177	NICConf *conf = container_of(peers_ptr, NICConf, peers);
	178	NetClientState **ncs = peers_ptr->ncs;
	179	NetClientState *peers[MAX_QUEUE_NUM];
	180	int queues, i = 0;
	181	int ret;
a404b612	182
1ceef9f2 JW	183	queues = qemu_find_net_clients_except(str, peers,
	184	NET_CLIENT_OPTIONS_KIND_NIC,
	185	MAX_QUEUE_NUM);
	186	if (queues == 0) {
	187	ret = -ENOENT;
	188	goto err;
a404b612	189	}
1ceef9f2 JW	190
	191	if (queues > MAX_QUEUE_NUM) {
	192	ret = -E2BIG;
	193	goto err;
	194	}
	195
	196	for (i = 0; i < queues; i++) {
	197	if (peers[i] == NULL) {
	198	ret = -ENOENT;
	199	goto err;
	200	}
	201
	202	if (peers[i]->peer) {
	203	ret = -EEXIST;
	204	goto err;
	205	}
	206
	207	ncs[i] = peers[i];
	208	ncs[i]->queue_index = i;
a404b612	209	}
1ceef9f2 JW	210
	211	conf->queues = queues;
	212
a404b612	213	return 0;
1ceef9f2 JW	214
	215	err:
	216	return ret;
a404b612 EH	217	}
	218
	219	static const char print_netdev(void ptr)
	220	{
	221	NetClientState *netdev = ptr;
	222
	223	return netdev->name ? netdev->name : "";
	224	}
	225
	226	static void get_netdev(Object obj, Visitor v, void *opaque,
	227	const char name, Error *errp)
	228	{
	229	get_pointer(obj, v, opaque, print_netdev, name, errp);
	230	}
	231
	232	static void set_netdev(Object obj, Visitor v, void *opaque,
	233	const char name, Error *errp)
	234	{
	235	set_pointer(obj, v, opaque, parse_netdev, name, errp);
	236	}
	237
	238	PropertyInfo qdev_prop_netdev = {
	239	.name = "netdev",
	240	.get = get_netdev,
	241	.set = set_netdev,
	242	};
	243
	244	/* --- vlan --- */
	245
	246	static int print_vlan(DeviceState dev, Property prop, char *dest, size_t len)
	247	{
	248	NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
	249
	250	if (*ptr) {
	251	int id;
	252	if (!net_hub_id_for_client(*ptr, &id)) {
	253	return snprintf(dest, len, "%d", id);
	254	}
	255	}
	256
	257	return snprintf(dest, len, "<null>");
	258	}
	259
	260	static void get_vlan(Object obj, Visitor v, void *opaque,
	261	const char name, Error *errp)
	262	{
	263	DeviceState *dev = DEVICE(obj);
	264	Property *prop = opaque;
	265	NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
	266	int32_t id = -1;
	267
	268	if (*ptr) {
	269	int hub_id;
	270	if (!net_hub_id_for_client(*ptr, &hub_id)) {
	271	id = hub_id;
	272	}
	273	}
	274
	275	visit_type_int32(v, &id, name, errp);
	276	}
	277
	278	static void set_vlan(Object obj, Visitor v, void *opaque,
	279	const char name, Error *errp)
	280	{
281	DeviceState *dev = DEVICE(obj);
282	Property *prop = opaque;
1ceef9f2 JW	283	NICPeers *peers_ptr = qdev_get_prop_ptr(dev, prop);
1ceef9f2 JW	284	NetClientState **ptr = &peers_ptr->ncs[0];
a404b612 EH	285	Error *local_err = NULL;
	286	int32_t id;
	287	NetClientState *hubport;
	288
7983c8a3	289	if (dev->realized) {
a404b612 EH	290	error_set(errp, QERR_PERMISSION_DENIED);
	291	return;
	292	}
	293
	294	visit_type_int32(v, &id, name, &local_err);
	295	if (local_err) {
	296	error_propagate(errp, local_err);
	297	return;
	298	}
	299	if (id == -1) {
	300	*ptr = NULL;
	301	return;
	302	}
	303
	304	hubport = net_hub_port_find(id);
	305	if (!hubport) {
	306	error_set(errp, QERR_INVALID_PARAMETER_VALUE,
	307	name, prop->info->name);
	308	return;
	309	}
	310	*ptr = hubport;
	311	}
	312
	313	PropertyInfo qdev_prop_vlan = {
	314	.name = "vlan",
	315	.print = print_vlan,
	316	.get = get_vlan,
	317	.set = set_vlan,
	318	};
	319
	320	int qdev_prop_set_drive(DeviceState dev, const char name,
	321	BlockDriverState *value)
	322	{
	323	Error *errp = NULL;
	324	const char *bdrv_name = value ? bdrv_get_device_name(value) : "";
	325	object_property_set_str(OBJECT(dev), bdrv_name,
	326	name, &errp);
	327	if (errp) {
	328	qerror_report_err(errp);
	329	error_free(errp);
	330	return -1;
	331	}
	332	return 0;
	333	}
	334
	335	void qdev_prop_set_drive_nofail(DeviceState dev, const char name,
	336	BlockDriverState *value)
	337	{
	338	if (qdev_prop_set_drive(dev, name, value) < 0) {
	339	exit(1);
	340	}
	341	}
	342	void qdev_prop_set_chr(DeviceState dev, const char name,
	343	CharDriverState *value)
	344	{
	345	Error *errp = NULL;
	346	assert(!value \|\| value->label);
	347	object_property_set_str(OBJECT(dev),
	348	value ? value->label : "", name, &errp);
	349	assert_no_error(errp);
	350	}
	351
	352	void qdev_prop_set_netdev(DeviceState dev, const char name,
	353	NetClientState *value)
354	{
355	Error *errp = NULL;
356	assert(!value \|\| value->name);
357	object_property_set_str(OBJECT(dev),
358	value ? value->name : "", name, &errp);
359	assert_no_error(errp);
360	}
361
362	void qdev_set_nic_properties(DeviceState dev, NICInfo nd)
363	{
364	qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
365	if (nd->netdev) {
366	qdev_prop_set_netdev(dev, "netdev", nd->netdev);
367	}
368	if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
369	object_property_find(OBJECT(dev), "vectors", NULL)) {
370	qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
371	}
372	nd->instantiated = 1;
373	}
374
375	static int qdev_add_one_global(QemuOpts opts, void opaque)
376	{
377	GlobalProperty *g;
378
379	g = g_malloc0(sizeof(*g));
380	g->driver = qemu_opt_get(opts, "driver");
381	g->property = qemu_opt_get(opts, "property");
382	g->value = qemu_opt_get(opts, "value");
383	qdev_prop_register_global(g);
384	return 0;
385	}
386
387	void qemu_add_globals(void)
388	{
389	qemu_opts_foreach(qemu_find_opts("global"), qdev_add_one_global, NULL, 0);
390	}