[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 "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->state != DEV_STATE_CREATED) {
        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)
{
    NetClientState *netdev = qemu_find_netdev(str);

    if (netdev == NULL) {
        return -ENOENT;
    }
    if (netdev->peer) {
        return -EEXIST;
    }
    *ptr = netdev;
    return 0;
}

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;
    NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
    Error *local_err = NULL;
    int32_t id;
    NetClientState *hubport;

    if (dev->state != DEV_STATE_CREATED) {
        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"
a404b612	14	#include "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
	45	if (dev->state != DEV_STATE_CREATED) {
	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	{
176	NetClientState *netdev = qemu_find_netdev(str);
177
178	if (netdev == NULL) {
179	return -ENOENT;
180	}
181	if (netdev->peer) {
182	return -EEXIST;
183	}
184	*ptr = netdev;
185	return 0;
186	}
187
188	static const char print_netdev(void ptr)
189	{
190	NetClientState *netdev = ptr;
191
192	return netdev->name ? netdev->name : "";
193	}
194
195	static void get_netdev(Object obj, Visitor v, void *opaque,
196	const char name, Error *errp)
197	{
198	get_pointer(obj, v, opaque, print_netdev, name, errp);
199	}
200
201	static void set_netdev(Object obj, Visitor v, void *opaque,
202	const char name, Error *errp)
203	{
204	set_pointer(obj, v, opaque, parse_netdev, name, errp);
205	}
206
207	PropertyInfo qdev_prop_netdev = {
208	.name = "netdev",
209	.get = get_netdev,
210	.set = set_netdev,
211	};
212
213	/* --- vlan --- */
214
215	static int print_vlan(DeviceState dev, Property prop, char *dest, size_t len)
216	{
217	NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
218
219	if (*ptr) {
220	int id;
221	if (!net_hub_id_for_client(*ptr, &id)) {
222	return snprintf(dest, len, "%d", id);
223	}
224	}
225
226	return snprintf(dest, len, "<null>");
227	}
228
229	static void get_vlan(Object obj, Visitor v, void *opaque,
230	const char name, Error *errp)
231	{
232	DeviceState *dev = DEVICE(obj);
233	Property *prop = opaque;
234	NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
235	int32_t id = -1;
236
237	if (*ptr) {
238	int hub_id;
239	if (!net_hub_id_for_client(*ptr, &hub_id)) {
240	id = hub_id;
241	}
242	}
243
244	visit_type_int32(v, &id, name, errp);
245	}
246
247	static void set_vlan(Object obj, Visitor v, void *opaque,
248	const char name, Error *errp)
249	{
250	DeviceState *dev = DEVICE(obj);
251	Property *prop = opaque;
252	NetClientState **ptr = qdev_get_prop_ptr(dev, prop);
253	Error *local_err = NULL;
254	int32_t id;
255	NetClientState *hubport;
256
257	if (dev->state != DEV_STATE_CREATED) {
258	error_set(errp, QERR_PERMISSION_DENIED);
259	return;
260	}
261
262	visit_type_int32(v, &id, name, &local_err);
263	if (local_err) {
264	error_propagate(errp, local_err);
265	return;
266	}
267	if (id == -1) {
268	*ptr = NULL;
269	return;
270	}
271
272	hubport = net_hub_port_find(id);
273	if (!hubport) {
274	error_set(errp, QERR_INVALID_PARAMETER_VALUE,
275	name, prop->info->name);
276	return;
277	}
278	*ptr = hubport;
279	}
280
281	PropertyInfo qdev_prop_vlan = {
282	.name = "vlan",
283	.print = print_vlan,
284	.get = get_vlan,
285	.set = set_vlan,
286	};
287
288	int qdev_prop_set_drive(DeviceState dev, const char name,
289	BlockDriverState *value)
290	{
291	Error *errp = NULL;
292	const char *bdrv_name = value ? bdrv_get_device_name(value) : "";
293	object_property_set_str(OBJECT(dev), bdrv_name,
294	name, &errp);
295	if (errp) {
296	qerror_report_err(errp);
297	error_free(errp);
298	return -1;
299	}
300	return 0;
301	}
302
303	void qdev_prop_set_drive_nofail(DeviceState dev, const char name,
304	BlockDriverState *value)
305	{
306	if (qdev_prop_set_drive(dev, name, value) < 0) {
307	exit(1);
308	}
309	}
310	void qdev_prop_set_chr(DeviceState dev, const char name,
311	CharDriverState *value)
312	{
313	Error *errp = NULL;
314	assert(!value \|\| value->label);
315	object_property_set_str(OBJECT(dev),
316	value ? value->label : "", name, &errp);
317	assert_no_error(errp);
318	}
319
320	void qdev_prop_set_netdev(DeviceState dev, const char name,
321	NetClientState *value)
322	{
323	Error *errp = NULL;
324	assert(!value \|\| value->name);
325	object_property_set_str(OBJECT(dev),
326	value ? value->name : "", name, &errp);
327	assert_no_error(errp);
328	}
329
330	void qdev_set_nic_properties(DeviceState dev, NICInfo nd)
331	{
332	qdev_prop_set_macaddr(dev, "mac", nd->macaddr.a);
333	if (nd->netdev) {
334	qdev_prop_set_netdev(dev, "netdev", nd->netdev);
335	}
336	if (nd->nvectors != DEV_NVECTORS_UNSPECIFIED &&
337	object_property_find(OBJECT(dev), "vectors", NULL)) {
338	qdev_prop_set_uint32(dev, "vectors", nd->nvectors);
339	}
340	nd->instantiated = 1;
341	}
342
343	static int qdev_add_one_global(QemuOpts opts, void opaque)
344	{
345	GlobalProperty *g;
346
347	g = g_malloc0(sizeof(*g));
348	g->driver = qemu_opt_get(opts, "driver");
349	g->property = qemu_opt_get(opts, "property");
350	g->value = qemu_opt_get(opts, "value");
351	qdev_prop_register_global(g);
352	return 0;
353	}
354
355	void qemu_add_globals(void)
356	{
357	qemu_opts_foreach(qemu_find_opts("global"), qdev_add_one_global, NULL, 0);
358	}