199ee608f0
When frontend and backend are connected through a hub as below (showing only one direction), and the frontend (or in general, all output ports of the hub) cannot accept more traffic, the backend queues packets in queue-A. When the frontend (or in general, one output port) becomes ready again, quemu tries to flush packets from queue-B, which is unfortunately empty. e1000.0 <--[queue B]-- hub0port0(hub)hub0port1 <--[queue A]-- tap.0 To fix this i propose to introduce a new function net_hub_flush() which is called when trying to flush a queue connected to a hub. Signed-off-by: Luigi Rizzo <rizzo@iet.unipi.it> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
1207 lines
30 KiB
C
1207 lines
30 KiB
C
/*
|
|
* 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 "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 "qapi-visit.h"
|
|
#include "qapi/opts-visitor.h"
|
|
#include "qapi/dealloc-visitor.h"
|
|
|
|
/* Net bridge is currently not supported for W32. */
|
|
#if !defined(_WIN32)
|
|
# define CONFIG_NET_BRIDGE
|
|
#endif
|
|
|
|
static QTAILQ_HEAD(, NetClientState) net_clients;
|
|
|
|
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;
|
|
}
|
|
|
|
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]);
|
|
}
|
|
|
|
void qemu_macaddr_default_if_unset(MACAddr *macaddr)
|
|
{
|
|
static int index = 0;
|
|
static const MACAddr zero = { .a = { 0,0,0,0,0,0 } };
|
|
|
|
if (memcmp(macaddr, &zero, sizeof(zero)) != 0)
|
|
return;
|
|
macaddr->a[0] = 0x52;
|
|
macaddr->a[1] = 0x54;
|
|
macaddr->a[2] = 0x00;
|
|
macaddr->a[3] = 0x12;
|
|
macaddr->a[4] = 0x34;
|
|
macaddr->a[5] = 0x56 + index++;
|
|
}
|
|
|
|
/**
|
|
* Generate a name for net client
|
|
*
|
|
* Only net clients created with the legacy -net option need this. Naming is
|
|
* mandatory for net clients created with -netdev.
|
|
*/
|
|
static char *assign_name(NetClientState *nc1, const char *model)
|
|
{
|
|
NetClientState *nc;
|
|
char buf[256];
|
|
int id = 0;
|
|
|
|
QTAILQ_FOREACH(nc, &net_clients, next) {
|
|
if (nc == nc1) {
|
|
continue;
|
|
}
|
|
/* For compatibility only bump id for net clients on a vlan */
|
|
if (strcmp(nc->model, model) == 0 &&
|
|
net_hub_id_for_client(nc, NULL) == 0) {
|
|
id++;
|
|
}
|
|
}
|
|
|
|
snprintf(buf, sizeof(buf), "%s.%d", model, id);
|
|
|
|
return g_strdup(buf);
|
|
}
|
|
|
|
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->send_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 *nc;
|
|
NetClientState **peers = conf->peers.ncs;
|
|
NICState *nic;
|
|
int i;
|
|
|
|
assert(info->type == NET_CLIENT_OPTIONS_KIND_NIC);
|
|
assert(info->size >= sizeof(NICState));
|
|
|
|
nc = qemu_new_net_client(info, peers[0], model, name);
|
|
nc->queue_index = 0;
|
|
|
|
nic = qemu_get_nic(nc);
|
|
nic->conf = conf;
|
|
nic->opaque = opaque;
|
|
|
|
for (i = 1; i < conf->queues; i++) {
|
|
qemu_net_client_setup(&nic->ncs[i], info, peers[i], model, nc->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 DO_UPCAST(NICState, ncs[0], nc0);
|
|
}
|
|
|
|
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->send_queue) {
|
|
qemu_del_net_queue(nc->send_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;
|
|
|
|
/* 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;
|
|
}
|
|
|
|
assert(nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC);
|
|
|
|
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->queues, 1);
|
|
|
|
/* 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);
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
int qemu_can_send_packet(NetClientState *sender)
|
|
{
|
|
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->send_queue, nc);
|
|
}
|
|
|
|
void qemu_flush_queued_packets(NetClientState *nc)
|
|
{
|
|
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();
|
|
}
|
|
return;
|
|
}
|
|
if (qemu_net_queue_flush(nc->send_queue)) {
|
|
/* We emptied the queue successfully, signal to the IO thread to repoll
|
|
* the file descriptor (for tap, for example).
|
|
*/
|
|
qemu_notify_event();
|
|
}
|
|
}
|
|
|
|
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->send_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[4096];
|
|
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->send_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 (!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)
|
|
{
|
|
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_report("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_report("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_report("invalid syntax for ethernet address");
|
|
return -1;
|
|
}
|
|
qemu_macaddr_default_if_unset(&nd->macaddr);
|
|
|
|
if (nic->has_vectors) {
|
|
if (nic->vectors > 0x7ffffff) {
|
|
error_report("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) = {
|
|
[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
|
|
[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,
|
|
};
|
|
|
|
|
|
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_NET_BRIDGE
|
|
case NET_CLIENT_OPTIONS_KIND_BRIDGE:
|
|
#endif
|
|
case NET_CLIENT_OPTIONS_KIND_HUBPORT:
|
|
break;
|
|
|
|
default:
|
|
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "type",
|
|
"a netdev backend type");
|
|
return -1;
|
|
}
|
|
} else {
|
|
u.net = object;
|
|
opts = u.net->opts;
|
|
/* 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) < 0) {
|
|
/* TODO push error reporting into init() methods */
|
|
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);
|
|
qapi_dealloc_visitor_cleanup(dv);
|
|
}
|
|
|
|
error_propagate(errp, err);
|
|
return ret;
|
|
}
|
|
|
|
|
|
static int net_host_check_device(const char *device)
|
|
{
|
|
int i;
|
|
const char *valid_param_list[] = { "tap", "socket", "dump"
|
|
#ifdef CONFIG_NET_BRIDGE
|
|
, "bridge"
|
|
#endif
|
|
#ifdef CONFIG_SLIRP
|
|
,"user"
|
|
#endif
|
|
#ifdef CONFIG_VDE
|
|
,"vde"
|
|
#endif
|
|
};
|
|
for (i = 0; i < sizeof(valid_param_list) / sizeof(char *); i++) {
|
|
if (!strncmp(valid_param_list[i], device,
|
|
strlen(valid_param_list[i])))
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void net_host_device_add(Monitor *mon, const QDict *qdict)
|
|
{
|
|
const char *device = qdict_get_str(qdict, "device");
|
|
const char *opts_str = qdict_get_try_str(qdict, "opts");
|
|
Error *local_err = NULL;
|
|
QemuOpts *opts;
|
|
|
|
if (!net_host_check_device(device)) {
|
|
monitor_printf(mon, "invalid host network device %s\n", device);
|
|
return;
|
|
}
|
|
|
|
opts = qemu_opts_parse(qemu_find_opts("net"), opts_str ? opts_str : "", 0);
|
|
if (!opts) {
|
|
return;
|
|
}
|
|
|
|
qemu_opt_set(opts, "type", device);
|
|
|
|
net_client_init(opts, 0, &local_err);
|
|
if (error_is_set(&local_err)) {
|
|
qerror_report_err(local_err);
|
|
error_free(local_err);
|
|
monitor_printf(mon, "adding host network device %s failed\n", device);
|
|
}
|
|
}
|
|
|
|
void net_host_device_remove(Monitor *mon, const QDict *qdict)
|
|
{
|
|
NetClientState *nc;
|
|
int vlan_id = qdict_get_int(qdict, "vlan_id");
|
|
const char *device = qdict_get_str(qdict, "device");
|
|
|
|
nc = net_hub_find_client_by_name(vlan_id, device);
|
|
if (!nc) {
|
|
return;
|
|
}
|
|
if (!net_host_check_device(nc->model)) {
|
|
monitor_printf(mon, "invalid host network device %s\n", device);
|
|
return;
|
|
}
|
|
qemu_del_net_client(nc);
|
|
}
|
|
|
|
void netdev_add(QemuOpts *opts, Error **errp)
|
|
{
|
|
net_client_init(opts, 1, errp);
|
|
}
|
|
|
|
int qmp_netdev_add(Monitor *mon, const QDict *qdict, QObject **ret)
|
|
{
|
|
Error *local_err = NULL;
|
|
QemuOptsList *opts_list;
|
|
QemuOpts *opts;
|
|
|
|
opts_list = qemu_find_opts_err("netdev", &local_err);
|
|
if (error_is_set(&local_err)) {
|
|
goto exit_err;
|
|
}
|
|
|
|
opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
|
|
if (error_is_set(&local_err)) {
|
|
goto exit_err;
|
|
}
|
|
|
|
netdev_add(opts, &local_err);
|
|
if (error_is_set(&local_err)) {
|
|
qemu_opts_del(opts);
|
|
goto exit_err;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_err:
|
|
qerror_report_err(local_err);
|
|
error_free(local_err);
|
|
return -1;
|
|
}
|
|
|
|
void qmp_netdev_del(const char *id, Error **errp)
|
|
{
|
|
NetClientState *nc;
|
|
QemuOpts *opts;
|
|
|
|
nc = qemu_find_netdev(id);
|
|
if (!nc) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, id);
|
|
return;
|
|
}
|
|
|
|
opts = qemu_opts_find(qemu_find_opts_err("netdev", NULL), id);
|
|
if (!opts) {
|
|
error_setg(errp, "Device '%s' is not a netdev", id);
|
|
return;
|
|
}
|
|
|
|
qemu_del_net_client(nc);
|
|
qemu_opts_del(opts);
|
|
}
|
|
|
|
void print_net_client(Monitor *mon, NetClientState *nc)
|
|
{
|
|
monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name,
|
|
nc->queue_index,
|
|
NetClientOptionsKind_lookup[nc->info->type],
|
|
nc->info_str);
|
|
}
|
|
|
|
void do_info_network(Monitor *mon, const QDict *qdict)
|
|
{
|
|
NetClientState *nc, *peer;
|
|
NetClientOptionsKind type;
|
|
|
|
net_hub_info(mon);
|
|
|
|
QTAILQ_FOREACH(nc, &net_clients, next) {
|
|
peer = nc->peer;
|
|
type = nc->info->type;
|
|
|
|
/* Skip if already printed in hub info */
|
|
if (net_hub_id_for_client(nc, NULL) == 0) {
|
|
continue;
|
|
}
|
|
|
|
if (!peer || type == NET_CLIENT_OPTIONS_KIND_NIC) {
|
|
print_net_client(mon, nc);
|
|
} /* else it's a netdev connected to a NIC, printed with the NIC */
|
|
if (peer && type == NET_CLIENT_OPTIONS_KIND_NIC) {
|
|
monitor_printf(mon, " \\ ");
|
|
print_net_client(mon, peer);
|
|
}
|
|
}
|
|
}
|
|
|
|
void qmp_set_link(const char *name, bool up, Error **errp)
|
|
{
|
|
NetClientState *ncs[MAX_QUEUE_NUM];
|
|
NetClientState *nc;
|
|
int queues, i;
|
|
|
|
queues = qemu_find_net_clients_except(name, ncs,
|
|
NET_CLIENT_OPTIONS_KIND_MAX,
|
|
MAX_QUEUE_NUM);
|
|
|
|
if (queues == 0) {
|
|
error_set(errp, QERR_DEVICE_NOT_FOUND, name);
|
|
return;
|
|
}
|
|
nc = ncs[0];
|
|
|
|
for (i = 0; i < queues; i++) {
|
|
ncs[i]->link_down = !up;
|
|
}
|
|
|
|
if (nc->info->link_status_changed) {
|
|
nc->info->link_status_changed(nc);
|
|
}
|
|
|
|
/* Notify peer. Don't update peer link status: this makes it possible to
|
|
* disconnect from host network without notifying the guest.
|
|
* FIXME: is disconnected link status change operation useful?
|
|
*
|
|
* Current behaviour is compatible with qemu vlans where there could be
|
|
* multiple clients that can still communicate with each other in
|
|
* disconnected mode. For now maintain this compatibility. */
|
|
if (nc->peer && nc->peer->info->link_status_changed) {
|
|
nc->peer->info->link_status_changed(nc->peer);
|
|
}
|
|
}
|
|
|
|
void net_cleanup(void)
|
|
{
|
|
NetClientState *nc;
|
|
|
|
/* We may del multiple entries during qemu_del_net_client(),
|
|
* so QTAILQ_FOREACH_SAFE() is also not safe here.
|
|
*/
|
|
while (!QTAILQ_EMPTY(&net_clients)) {
|
|
nc = QTAILQ_FIRST(&net_clients);
|
|
if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
|
|
qemu_del_nic(qemu_get_nic(nc));
|
|
} else {
|
|
qemu_del_net_client(nc);
|
|
}
|
|
}
|
|
}
|
|
|
|
void net_check_clients(void)
|
|
{
|
|
NetClientState *nc;
|
|
int i;
|
|
|
|
/* Don't warn about the default network setup that you get if
|
|
* no command line -net or -netdev options are specified. There
|
|
* are two cases that we would otherwise complain about:
|
|
* (1) board doesn't support a NIC but the implicit "-net nic"
|
|
* requested one
|
|
* (2) CONFIG_SLIRP not set, in which case the implicit "-net nic"
|
|
* sets up a nic that isn't connected to anything.
|
|
*/
|
|
if (default_net) {
|
|
return;
|
|
}
|
|
|
|
net_hub_check_clients();
|
|
|
|
QTAILQ_FOREACH(nc, &net_clients, next) {
|
|
if (!nc->peer) {
|
|
fprintf(stderr, "Warning: %s %s has no peer\n",
|
|
nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC ?
|
|
"nic" : "netdev", nc->name);
|
|
}
|
|
}
|
|
|
|
/* Check that all NICs requested via -net nic actually got created.
|
|
* NICs created via -device don't need to be checked here because
|
|
* they are always instantiated.
|
|
*/
|
|
for (i = 0; i < MAX_NICS; i++) {
|
|
NICInfo *nd = &nd_table[i];
|
|
if (nd->used && !nd->instantiated) {
|
|
fprintf(stderr, "Warning: requested NIC (%s, model %s) "
|
|
"was not created (not supported by this machine?)\n",
|
|
nd->name ? nd->name : "anonymous",
|
|
nd->model ? nd->model : "unspecified");
|
|
}
|
|
}
|
|
}
|
|
|
|
static int net_init_client(QemuOpts *opts, void *dummy)
|
|
{
|
|
Error *local_err = NULL;
|
|
|
|
net_client_init(opts, 0, &local_err);
|
|
if (error_is_set(&local_err)) {
|
|
qerror_report_err(local_err);
|
|
error_free(local_err);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int net_init_netdev(QemuOpts *opts, void *dummy)
|
|
{
|
|
Error *local_err = NULL;
|
|
int ret;
|
|
|
|
ret = net_client_init(opts, 1, &local_err);
|
|
if (error_is_set(&local_err)) {
|
|
qerror_report_err(local_err);
|
|
error_free(local_err);
|
|
return -1;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
int net_init_clients(void)
|
|
{
|
|
QemuOptsList *net = qemu_find_opts("net");
|
|
|
|
if (default_net) {
|
|
/* if no clients, we use a default config */
|
|
qemu_opts_set(net, NULL, "type", "nic");
|
|
#ifdef CONFIG_SLIRP
|
|
qemu_opts_set(net, NULL, "type", "user");
|
|
#endif
|
|
}
|
|
|
|
QTAILQ_INIT(&net_clients);
|
|
|
|
if (qemu_opts_foreach(qemu_find_opts("netdev"), net_init_netdev, NULL, 1) == -1)
|
|
return -1;
|
|
|
|
if (qemu_opts_foreach(net, net_init_client, NULL, 1) == -1) {
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int net_client_parse(QemuOptsList *opts_list, const char *optarg)
|
|
{
|
|
#if defined(CONFIG_SLIRP)
|
|
int ret;
|
|
if (net_slirp_parse_legacy(opts_list, optarg, &ret)) {
|
|
return ret;
|
|
}
|
|
#endif
|
|
|
|
if (!qemu_opts_parse(opts_list, optarg, 1)) {
|
|
return -1;
|
|
}
|
|
|
|
default_net = 0;
|
|
return 0;
|
|
}
|
|
|
|
/* From FreeBSD */
|
|
/* XXX: optimize */
|
|
unsigned compute_mcast_idx(const uint8_t *ep)
|
|
{
|
|
uint32_t crc;
|
|
int carry, i, j;
|
|
uint8_t b;
|
|
|
|
crc = 0xffffffff;
|
|
for (i = 0; i < 6; i++) {
|
|
b = *ep++;
|
|
for (j = 0; j < 8; j++) {
|
|
carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
|
|
crc <<= 1;
|
|
b >>= 1;
|
|
if (carry) {
|
|
crc = ((crc ^ POLYNOMIAL) | carry);
|
|
}
|
|
}
|
|
}
|
|
return crc >> 26;
|
|
}
|
|
|
|
QemuOptsList qemu_netdev_opts = {
|
|
.name = "netdev",
|
|
.implied_opt_name = "type",
|
|
.head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
|
|
.desc = {
|
|
/*
|
|
* no elements => accept any params
|
|
* validation will happen later
|
|
*/
|
|
{ /* end of list */ }
|
|
},
|
|
};
|
|
|
|
QemuOptsList qemu_net_opts = {
|
|
.name = "net",
|
|
.implied_opt_name = "type",
|
|
.head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
|
|
.desc = {
|
|
/*
|
|
* no elements => accept any params
|
|
* validation will happen later
|
|
*/
|
|
{ /* end of list */ }
|
|
},
|
|
};
|