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net.c
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/*
* QEMU System Emulator
*
* Copyright (c) 2003-2008 Fabrice Bellard
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "config-host.h"
#include "net/net.h"
#include "clients.h"
#include "hub.h"
#include "net/slirp.h"
#include "net/eth.h"
#include "util.h"
#include "monitor/monitor.h"
#include "qemu-common.h"
#include "qemu/sockets.h"
#include "qemu/config-file.h"
#include "qmp-commands.h"
#include "hw/qdev.h"
#include "qemu/iov.h"
#include "qemu/main-loop.h"
#include "qapi-visit.h"
#include "qapi/opts-visitor.h"
#include "qapi/dealloc-visitor.h"
#include "sysemu/sysemu.h"
/* Net bridge is currently not supported for W32. */
#if !defined(_WIN32)
# define CONFIG_NET_BRIDGE
#endif
static VMChangeStateEntry *net_change_state_entry;
static QTAILQ_HEAD(, NetClientState) net_clients;
const char *host_net_devices[] = {
"tap",
"socket",
"dump",
#ifdef CONFIG_NET_BRIDGE
"bridge",
#endif
#ifdef CONFIG_SLIRP
"user",
#endif
#ifdef CONFIG_VDE
"vde",
#endif
"vhost-user",
NULL,
};
int default_net = 1;
/***********************************************************/
/* network device redirectors */
#if defined(DEBUG_NET)
static void hex_dump(FILE *f, const uint8_t *buf, int size)
{
int len, i, j, c;
for(i=0;i<size;i+=16) {
len = size - i;
if (len > 16)
len = 16;
fprintf(f, "%08x ", i);
for(j=0;j<16;j++) {
if (j < len)
fprintf(f, " %02x", buf[i+j]);
else
fprintf(f, " ");
}
fprintf(f, " ");
for(j=0;j<len;j++) {
c = buf[i+j];
if (c < ' ' || c > '~')
c = '.';
fprintf(f, "%c", c);
}
fprintf(f, "\n");
}
}
#endif
static int get_str_sep(char *buf, int buf_size, const char **pp, int sep)
{
const char *p, *p1;
int len;
p = *pp;
p1 = strchr(p, sep);
if (!p1)
return -1;
len = p1 - p;
p1++;
if (buf_size > 0) {
if (len > buf_size - 1)
len = buf_size - 1;
memcpy(buf, p, len);
buf[len] = '\0';
}
*pp = p1;
return 0;
}
int parse_host_port(struct sockaddr_in *saddr, const char *str)
{
char buf[512];
struct hostent *he;
const char *p, *r;
int port;
p = str;
if (get_str_sep(buf, sizeof(buf), &p, ':') < 0)
return -1;
saddr->sin_family = AF_INET;
if (buf[0] == '\0') {
saddr->sin_addr.s_addr = 0;
} else {
if (qemu_isdigit(buf[0])) {
if (!inet_aton(buf, &saddr->sin_addr))
return -1;
} else {
if ((he = gethostbyname(buf)) == NULL)
return - 1;
saddr->sin_addr = *(struct in_addr *)he->h_addr;
}
}
port = strtol(p, (char **)&r, 0);
if (r == p)
return -1;
saddr->sin_port = htons(port);
return 0;
}
char *qemu_mac_strdup_printf(const uint8_t *macaddr)
{
return g_strdup_printf("%.2x:%.2x:%.2x:%.2x:%.2x:%.2x",
macaddr[0], macaddr[1], macaddr[2],
macaddr[3], macaddr[4], macaddr[5]);
}
void qemu_format_nic_info_str(NetClientState *nc, uint8_t macaddr[6])
{
snprintf(nc->info_str, sizeof(nc->info_str),
"model=%s,macaddr=%02x:%02x:%02x:%02x:%02x:%02x",
nc->model,
macaddr[0], macaddr[1], macaddr[2],
macaddr[3], macaddr[4], macaddr[5]);
}
static int mac_table[256] = {0};
static void qemu_macaddr_set_used(MACAddr *macaddr)
{
int index;
for (index = 0x56; index < 0xFF; index++) {
if (macaddr->a[5] == index) {
mac_table[index]++;
}
}
}
static void qemu_macaddr_set_free(MACAddr *macaddr)
{
int index;
static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
return;
}
for (index = 0x56; index < 0xFF; index++) {
if (macaddr->a[5] == index) {
mac_table[index]--;
}
}
}
static int qemu_macaddr_get_free(void)
{
int index;
for (index = 0x56; index < 0xFF; index++) {
if (mac_table[index] == 0) {
return index;
}
}
return -1;
}
void qemu_macaddr_default_if_unset(MACAddr *macaddr)
{
static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
static const MACAddr base = { .a = { 0x52, 0x54, 0x00, 0x12, 0x34, 0 } };
if (memcmp(macaddr, &zero, sizeof(zero)) != 0) {
if (memcmp(macaddr->a, &base.a, (sizeof(base.a) - 1)) != 0) {
return;
} else {
qemu_macaddr_set_used(macaddr);
return;
}
}
macaddr->a[0] = 0x52;
macaddr->a[1] = 0x54;
macaddr->a[2] = 0x00;
macaddr->a[3] = 0x12;
macaddr->a[4] = 0x34;
macaddr->a[5] = qemu_macaddr_get_free();
qemu_macaddr_set_used(macaddr);
}
/**
* Generate a name for net client
*
* Only net clients created with the legacy -net option and NICs need this.
*/
static char *assign_name(NetClientState *nc1, const char *model)
{
NetClientState *nc;
int id = 0;
QTAILQ_FOREACH(nc, &net_clients, next) {
if (nc == nc1) {
continue;
}
if (strcmp(nc->model, model) == 0) {
id++;
}
}
return g_strdup_printf("%s.%d", model, id);
}
static void qemu_net_client_destructor(NetClientState *nc)
{
g_free(nc);
}
static void qemu_net_client_setup(NetClientState *nc,
NetClientInfo *info,
NetClientState *peer,
const char *model,
const char *name,
NetClientDestructor *destructor)
{
nc->info = info;
nc->model = g_strdup(model);
if (name) {
nc->name = g_strdup(name);
} else {
nc->name = assign_name(nc, model);
}
if (peer) {
assert(!peer->peer);
nc->peer = peer;
peer->peer = nc;
}
QTAILQ_INSERT_TAIL(&net_clients, nc, next);
nc->incoming_queue = qemu_new_net_queue(nc);
nc->destructor = destructor;
}
NetClientState *qemu_new_net_client(NetClientInfo *info,
NetClientState *peer,
const char *model,
const char *name)
{
NetClientState *nc;
assert(info->size >= sizeof(NetClientState));
nc = g_malloc0(info->size);
qemu_net_client_setup(nc, info, peer, model, name,
qemu_net_client_destructor);
return nc;
}
NICState *qemu_new_nic(NetClientInfo *info,
NICConf *conf,
const char *model,
const char *name,
void *opaque)
{
NetClientState **peers = conf->peers.ncs;
NICState *nic;
int i, queues = MAX(1, conf->peers.queues);
assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
assert(info->size >= sizeof(NICState));
nic = g_malloc0(info->size + sizeof(NetClientState) * queues);
nic->ncs = (void *)nic + info->size;
nic->conf = conf;
nic->opaque = opaque;
for (i = 0; i < queues; i++) {
qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, name,
NULL);
nic->ncs[i].queue_index = i;
}
return nic;
}
NetClientState *qemu_get_subqueue(NICState *nic, int queue_index)
{
return nic->ncs + queue_index;
}
NetClientState *qemu_get_queue(NICState *nic)
{
return qemu_get_subqueue(nic, 0);
}
NICState *qemu_get_nic(NetClientState *nc)
{
NetClientState *nc0 = nc - nc->queue_index;
return (NICState *)((void *)nc0 - nc->info->size);
}
void *qemu_get_nic_opaque(NetClientState *nc)
{
NICState *nic = qemu_get_nic(nc);
return nic->opaque;
}
static void qemu_cleanup_net_client(NetClientState *nc)
{
QTAILQ_REMOVE(&net_clients, nc, next);
if (nc->info->cleanup) {
nc->info->cleanup(nc);
}
}
static void qemu_free_net_client(NetClientState *nc)
{
if (nc->incoming_queue) {
qemu_del_net_queue(nc->incoming_queue);
}
if (nc->peer) {
nc->peer->peer = NULL;
}
g_free(nc->name);
g_free(nc->model);
if (nc->destructor) {
nc->destructor(nc);
}
}
void qemu_del_net_client(NetClientState *nc)
{
NetClientState *ncs[MAX_QUEUE_NUM];
int queues, i;
assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
/* If the NetClientState belongs to a multiqueue backend, we will change all
* other NetClientStates also.
*/
queues = qemu_find_net_clients_except(nc->name, ncs,
NET_CLIENT_OPTIONS_KIND_NIC,
MAX_QUEUE_NUM);
assert(queues != 0);
/* If there is a peer NIC, delete and cleanup client, but do not free. */
if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
NICState *nic = qemu_get_nic(nc->peer);
if (nic->peer_deleted) {
return;
}
nic->peer_deleted = true;
for (i = 0; i < queues; i++) {
ncs[i]->peer->link_down = true;
}
if (nc->peer->info->link_status_changed) {
nc->peer->info->link_status_changed(nc->peer);
}
for (i = 0; i < queues; i++) {
qemu_cleanup_net_client(ncs[i]);
}
return;
}
for (i = 0; i < queues; i++) {
qemu_cleanup_net_client(ncs[i]);
qemu_free_net_client(ncs[i]);
}
}
void qemu_del_nic(NICState *nic)
{
int i, queues = MAX(nic->conf->peers.queues, 1);
qemu_macaddr_set_free(&nic->conf->macaddr);
/* If this is a peer NIC and peer has already been deleted, free it now. */
if (nic->peer_deleted) {
for (i = 0; i < queues; i++) {
qemu_free_net_client(qemu_get_subqueue(nic, i)->peer);
}
}
for (i = queues - 1; i >= 0; i--) {
NetClientState *nc = qemu_get_subqueue(nic, i);
qemu_cleanup_net_client(nc);
qemu_free_net_client(nc);
}
g_free(nic);
}
void qemu_foreach_nic(qemu_nic_foreach func, void *opaque)
{
NetClientState *nc;
QTAILQ_FOREACH(nc, &net_clients, next) {
if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
if (nc->queue_index == 0) {
func(qemu_get_nic(nc), opaque);
}
}
}
}
bool qemu_has_ufo(NetClientState *nc)
{
if (!nc || !nc->info->has_ufo) {
return false;
}
return nc->info->has_ufo(nc);
}
bool qemu_has_vnet_hdr(NetClientState *nc)
{
if (!nc || !nc->info->has_vnet_hdr) {
return false;
}
return nc->info->has_vnet_hdr(nc);
}
bool qemu_has_vnet_hdr_len(NetClientState *nc, int len)
{
if (!nc || !nc->info->has_vnet_hdr_len) {
return false;
}
return nc->info->has_vnet_hdr_len(nc, len);
}
void qemu_using_vnet_hdr(NetClientState *nc, bool enable)
{
if (!nc || !nc->info->using_vnet_hdr) {
return;
}
nc->info->using_vnet_hdr(nc, enable);
}
void qemu_set_offload(NetClientState *nc, int csum, int tso4, int tso6,
int ecn, int ufo)
{
if (!nc || !nc->info->set_offload) {
return;
}
nc->info->set_offload(nc, csum, tso4, tso6, ecn, ufo);
}
void qemu_set_vnet_hdr_len(NetClientState *nc, int len)
{
if (!nc || !nc->info->set_vnet_hdr_len) {
return;
}
nc->info->set_vnet_hdr_len(nc, len);
}
int qemu_can_send_packet(NetClientState *sender)
{
int vm_running = runstate_is_running();
if (!vm_running) {
return 0;
}
if (!sender->peer) {
return 1;
}
if (sender->peer->receive_disabled) {
return 0;
} else if (sender->peer->info->can_receive &&
!sender->peer->info->can_receive(sender->peer)) {
return 0;
}
return 1;
}
ssize_t qemu_deliver_packet(NetClientState *sender,
unsigned flags,
const uint8_t *data,
size_t size,
void *opaque)
{
NetClientState *nc = opaque;
ssize_t ret;
if (nc->link_down) {
return size;
}
if (nc->receive_disabled) {
return 0;
}
if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) {
ret = nc->info->receive_raw(nc, data, size);
} else {
ret = nc->info->receive(nc, data, size);
}
if (ret == 0) {
nc->receive_disabled = 1;
}
return ret;
}
void qemu_purge_queued_packets(NetClientState *nc)
{
if (!nc->peer) {
return;
}
qemu_net_queue_purge(nc->peer->incoming_queue, nc);
}
static
void qemu_flush_or_purge_queued_packets(NetClientState *nc, bool purge)
{
nc->receive_disabled = 0;
if (nc->peer && nc->peer->info->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
if (net_hub_flush(nc->peer)) {
qemu_notify_event();
}
}
if (qemu_net_queue_flush(nc->incoming_queue)) {
/* We emptied the queue successfully, signal to the IO thread to repoll
* the file descriptor (for tap, for example).
*/
qemu_notify_event();
} else if (purge) {
/* Unable to empty the queue, purge remaining packets */
qemu_net_queue_purge(nc->incoming_queue, nc);
}
}
void qemu_flush_queued_packets(NetClientState *nc)
{
qemu_flush_or_purge_queued_packets(nc, false);
}
static ssize_t qemu_send_packet_async_with_flags(NetClientState *sender,
unsigned flags,
const uint8_t *buf, int size,
NetPacketSent *sent_cb)
{
NetQueue *queue;
#ifdef DEBUG_NET
printf("qemu_send_packet_async:\n");
hex_dump(stdout, buf, size);
#endif
if (sender->link_down || !sender->peer) {
return size;
}
queue = sender->peer->incoming_queue;
return qemu_net_queue_send(queue, sender, flags, buf, size, sent_cb);
}
ssize_t qemu_send_packet_async(NetClientState *sender,
const uint8_t *buf, int size,
NetPacketSent *sent_cb)
{
return qemu_send_packet_async_with_flags(sender, QEMU_NET_PACKET_FLAG_NONE,
buf, size, sent_cb);
}
void qemu_send_packet(NetClientState *nc, const uint8_t *buf, int size)
{
qemu_send_packet_async(nc, buf, size, NULL);
}
ssize_t qemu_send_packet_raw(NetClientState *nc, const uint8_t *buf, int size)
{
return qemu_send_packet_async_with_flags(nc, QEMU_NET_PACKET_FLAG_RAW,
buf, size, NULL);
}
static ssize_t nc_sendv_compat(NetClientState *nc, const struct iovec *iov,
int iovcnt)
{
uint8_t buffer[NET_BUFSIZE];
size_t offset;
offset = iov_to_buf(iov, iovcnt, 0, buffer, sizeof(buffer));
return nc->info->receive(nc, buffer, offset);
}
ssize_t qemu_deliver_packet_iov(NetClientState *sender,
unsigned flags,
const struct iovec *iov,
int iovcnt,
void *opaque)
{
NetClientState *nc = opaque;
int ret;
if (nc->link_down) {
return iov_size(iov, iovcnt);
}
if (nc->receive_disabled) {
return 0;
}
if (nc->info->receive_iov) {
ret = nc->info->receive_iov(nc, iov, iovcnt);
} else {
ret = nc_sendv_compat(nc, iov, iovcnt);
}
if (ret == 0) {
nc->receive_disabled = 1;
}
return ret;
}
ssize_t qemu_sendv_packet_async(NetClientState *sender,
const struct iovec *iov, int iovcnt,
NetPacketSent *sent_cb)
{
NetQueue *queue;
if (sender->link_down || !sender->peer) {
return iov_size(iov, iovcnt);
}
queue = sender->peer->incoming_queue;
return qemu_net_queue_send_iov(queue, sender,
QEMU_NET_PACKET_FLAG_NONE,
iov, iovcnt, sent_cb);
}
ssize_t
qemu_sendv_packet(NetClientState *nc, const struct iovec *iov, int iovcnt)
{
return qemu_sendv_packet_async(nc, iov, iovcnt, NULL);
}
NetClientState *qemu_find_netdev(const char *id)
{
NetClientState *nc;
QTAILQ_FOREACH(nc, &net_clients, next) {
if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC)
continue;
if (!strcmp(nc->name, id)) {
return nc;
}
}
return NULL;
}
int qemu_find_net_clients_except(const char *id, NetClientState **ncs,
NetClientOptionsKind type, int max)
{
NetClientState *nc;
int ret = 0;
QTAILQ_FOREACH(nc, &net_clients, next) {
if (nc->info->type == type) {
continue;
}
if (!id || !strcmp(nc->name, id)) {
if (ret < max) {
ncs[ret] = nc;
}
ret++;
}
}
return ret;
}
static int nic_get_free_idx(void)
{
int index;
for (index = 0; index < MAX_NICS; index++)
if (!nd_table[index].used)
return index;
return -1;
}
int qemu_show_nic_models(const char *arg, const char *const *models)
{
int i;
if (!arg || !is_help_option(arg)) {
return 0;
}
fprintf(stderr, "qemu: Supported NIC models: ");
for (i = 0 ; models[i]; i++)
fprintf(stderr, "%s%c", models[i], models[i+1] ? ',' : '\n');
return 1;
}
void qemu_check_nic_model(NICInfo *nd, const char *model)
{
const char *models[2];
models[0] = model;
models[1] = NULL;
if (qemu_show_nic_models(nd->model, models))
exit(0);
if (qemu_find_nic_model(nd, models, model) < 0)
exit(1);
}
int qemu_find_nic_model(NICInfo *nd, const char * const *models,
const char *default_model)
{
int i;
if (!nd->model)
nd->model = g_strdup(default_model);
for (i = 0 ; models[i]; i++) {
if (strcmp(nd->model, models[i]) == 0)
return i;
}
error_report("Unsupported NIC model: %s", nd->model);
return -1;
}
static int net_init_nic(const NetClientOptions *opts, const char *name,
NetClientState *peer, Error **errp)
{
int idx;
NICInfo *nd;
const NetLegacyNicOptions *nic;
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_NIC);
nic = opts->nic;
idx = nic_get_free_idx();
if (idx == -1 || nb_nics >= MAX_NICS) {
error_setg(errp, "too many NICs");
return -1;
}
nd = &nd_table[idx];
memset(nd, 0, sizeof(*nd));
if (nic->has_netdev) {
nd->netdev = qemu_find_netdev(nic->netdev);
if (!nd->netdev) {
error_setg(errp, "netdev '%s' not found", nic->netdev);
return -1;
}
} else {
assert(peer);
nd->netdev = peer;
}
nd->name = g_strdup(name);
if (nic->has_model) {
nd->model = g_strdup(nic->model);
}
if (nic->has_addr) {
nd->devaddr = g_strdup(nic->addr);
}
if (nic->has_macaddr &&
net_parse_macaddr(nd->macaddr.a, nic->macaddr) < 0) {
error_setg(errp, "invalid syntax for ethernet address");
return -1;
}
if (nic->has_macaddr &&
is_multicast_ether_addr(nd->macaddr.a)) {
error_setg(errp,
"NIC cannot have multicast MAC address (odd 1st byte)");
return -1;
}
qemu_macaddr_default_if_unset(&nd->macaddr);
if (nic->has_vectors) {
if (nic->vectors > 0x7ffffff) {
error_setg(errp, "invalid # of vectors: %"PRIu32, nic->vectors);
return -1;
}
nd->nvectors = nic->vectors;
} else {
nd->nvectors = DEV_NVECTORS_UNSPECIFIED;
}
nd->used = 1;
nb_nics++;
return idx;
}
static int (* const net_client_init_fun[NET_CLIENT_OPTIONS_KIND_MAX])(
const NetClientOptions *opts,
const char *name,
NetClientState *peer, Error **errp) = {
[NET_CLIENT_OPTIONS_KIND_NIC] = net_init_nic,
#ifdef CONFIG_SLIRP
[NET_CLIENT_OPTIONS_KIND_USER] = net_init_slirp,
#endif
[NET_CLIENT_OPTIONS_KIND_TAP] = net_init_tap,
[NET_CLIENT_OPTIONS_KIND_SOCKET] = net_init_socket,
#ifdef CONFIG_VDE
[NET_CLIENT_OPTIONS_KIND_VDE] = net_init_vde,
#endif
#ifdef CONFIG_NETMAP
[NET_CLIENT_OPTIONS_KIND_NETMAP] = net_init_netmap,
#endif
[NET_CLIENT_OPTIONS_KIND_DUMP] = net_init_dump,
#ifdef CONFIG_NET_BRIDGE
[NET_CLIENT_OPTIONS_KIND_BRIDGE] = net_init_bridge,
#endif
[NET_CLIENT_OPTIONS_KIND_HUBPORT] = net_init_hubport,
#ifdef CONFIG_VHOST_NET_USED
[NET_CLIENT_OPTIONS_KIND_VHOST_USER] = net_init_vhost_user,
#endif
#ifdef CONFIG_L2TPV3
[NET_CLIENT_OPTIONS_KIND_L2TPV3] = net_init_l2tpv3,
#endif
};
static int net_client_init1(const void *object, int is_netdev, Error **errp)
{
union {
const Netdev *netdev;
const NetLegacy *net;
} u;
const NetClientOptions *opts;
const char *name;
if (is_netdev) {
u.netdev = object;
opts = u.netdev->opts;
name = u.netdev->id;
switch (opts->kind) {
#ifdef CONFIG_SLIRP
case NET_CLIENT_OPTIONS_KIND_USER:
#endif
case NET_CLIENT_OPTIONS_KIND_TAP:
case NET_CLIENT_OPTIONS_KIND_SOCKET:
#ifdef CONFIG_VDE
case NET_CLIENT_OPTIONS_KIND_VDE:
#endif
#ifdef CONFIG_NETMAP
case NET_CLIENT_OPTIONS_KIND_NETMAP:
#endif
#ifdef CONFIG_NET_BRIDGE
case NET_CLIENT_OPTIONS_KIND_BRIDGE:
#endif
case NET_CLIENT_OPTIONS_KIND_HUBPORT:
#ifdef CONFIG_VHOST_NET_USED
case NET_CLIENT_OPTIONS_KIND_VHOST_USER:
#endif
#ifdef CONFIG_L2TPV3
case NET_CLIENT_OPTIONS_KIND_L2TPV3:
#endif
break;
default:
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
"a netdev backend type");
return -1;
}
} else {
u.net = object;
opts = u.net->opts;
if (opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
"a net type");
return -1;
}
/* missing optional values have been initialized to "all bits zero" */
name = u.net->has_id ? u.net->id : u.net->name;
}
if (net_client_init_fun[opts->kind]) {
NetClientState *peer = NULL;
/* Do not add to a vlan if it's a -netdev or a nic with a netdev=
* parameter. */
if (!is_netdev &&
(opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
!opts->nic->has_netdev)) {
peer = net_hub_add_port(u.net->has_vlan ? u.net->vlan : 0, NULL);
}
if (net_client_init_fun[opts->kind](opts, name, peer, errp) < 0) {
/* FIXME drop when all init functions store an Error */
if (errp && !*errp) {
error_set(errp, QERR_DEVICE_INIT_FAILED,
NetClientOptionsKind_lookup[opts->kind]);
}
return -1;
}
}
return 0;
}
static void net_visit(Visitor *v, int is_netdev, void **object, Error **errp)
{
if (is_netdev) {
visit_type_Netdev(v, (Netdev **)object, NULL, errp);
} else {
visit_type_NetLegacy(v, (NetLegacy **)object, NULL, errp);
}
}
int net_client_init(QemuOpts *opts, int is_netdev, Error **errp)
{
void *object = NULL;
Error *err = NULL;
int ret = -1;
{
OptsVisitor *ov = opts_visitor_new(opts);
net_visit(opts_get_visitor(ov), is_netdev, &object, &err);
opts_visitor_cleanup(ov);
}
if (!err) {
ret = net_client_init1(object, is_netdev, &err);
}
if (object) {
QapiDeallocVisitor *dv = qapi_dealloc_visitor_new();
net_visit(qapi_dealloc_get_visitor(dv), is_netdev, &object, NULL);