--- /dev/null
+/*
+ * 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 "qapi/qmp/qerror.h"
+#include "qemu/error-report.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_NETMAP
+ "netmap",
+#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_set_vnet_le(NetClientState *nc, bool is_le)
+{
+ if (!nc || !nc->info->set_vnet_le) {
+ return -ENOSYS;
+ }
+
+ return nc->info->set_vnet_le(nc, is_le);
+}
+
+int qemu_set_vnet_be(NetClientState *nc, bool is_be)
+{
+ if (!nc || !nc->info->set_vnet_be) {
+ return -ENOSYS;
+ }
+
+ return nc->info->set_vnet_be(nc, is_be);
+}
+
+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)
+{
+ const NetClientOptions *opts;
+ const char *name;
+ NetClientState *peer = NULL;
+
+ if (is_netdev) {
+ const Netdev *netdev = object;
+ opts = netdev->opts;
+ name = netdev->id;
+
+ if (opts->kind == NET_CLIENT_OPTIONS_KIND_DUMP ||
+ opts->kind == NET_CLIENT_OPTIONS_KIND_NIC ||
+ !net_client_init_fun[opts->kind]) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
+ "a netdev backend type");
+ return -1;
+ }
+ } else {
+ const NetLegacy *net = object;
+ opts = net->opts;
+ /* missing optional values have been initialized to "all bits zero" */
+ name = net->has_id ? net->id : net->name;
+
+ if (opts->kind == NET_CLIENT_OPTIONS_KIND_NONE) {
+ return 0; /* nothing to do */
+ }
+ if (opts->kind == NET_CLIENT_OPTIONS_KIND_HUBPORT) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
+ "a net type");
+ return -1;
+ }
+
+ if (!net_client_init_fun[opts->kind]) {
+ error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type",
+ "a net backend type (maybe it is not compiled "
+ "into this binary)");
+ return -1;
+ }
+
+ /* Do not add to a vlan if it's a nic with a netdev= parameter. */
+ if (opts->kind != NET_CLIENT_OPTIONS_KIND_NIC ||
+ !opts->nic->has_netdev) {
+ peer = net_hub_add_port(net->has_vlan ? 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_setg(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;
+ for (i = 0; host_net_devices[i]; i++) {
+ if (!strncmp(host_net_devices[i], device,
+ strlen(host_net_devices[i]))) {
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+void hmp_host_net_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_noisily(qemu_find_opts("net"),
+ opts_str ? opts_str : "", false);
+ if (!opts) {
+ return;
+ }
+
+ qemu_opt_set(opts, "type", device, &error_abort);
+
+ net_client_init(opts, 0, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ monitor_printf(mon, "adding host network device %s failed\n", device);
+ }
+}
+
+void hmp_host_net_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) {
+ error_report("Host network device '%s' on hub '%d' not found",
+ device, vlan_id);
+ return;
+ }
+ if (nc->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ error_report("invalid host network device '%s'", device);
+ return;
+ }
+
+ qemu_del_net_client(nc->peer);
+ qemu_del_net_client(nc);
+}
+
+void netdev_add(QemuOpts *opts, Error **errp)
+{
+ net_client_init(opts, 1, errp);
+}
+
+void qmp_netdev_add(QDict *qdict, QObject **ret, Error **errp)
+{
+ Error *local_err = NULL;
+ QemuOptsList *opts_list;
+ QemuOpts *opts;
+
+ opts_list = qemu_find_opts_err("netdev", &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ opts = qemu_opts_from_qdict(opts_list, qdict, &local_err);
+ if (local_err) {
+ goto out;
+ }
+
+ netdev_add(opts, &local_err);
+ if (local_err) {
+ qemu_opts_del(opts);
+ goto out;
+ }
+
+out:
+ error_propagate(errp, local_err);
+}
+
+void qmp_netdev_del(const char *id, Error **errp)
+{
+ NetClientState *nc;
+ QemuOpts *opts;
+
+ nc = qemu_find_netdev(id);
+ if (!nc) {
+ error_set(errp, ERROR_CLASS_DEVICE_NOT_FOUND,
+ "Device '%s' 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);
+}
+
+RxFilterInfoList *qmp_query_rx_filter(bool has_name, const char *name,
+ Error **errp)
+{
+ NetClientState *nc;
+ RxFilterInfoList *filter_list = NULL, *last_entry = NULL;
+
+ QTAILQ_FOREACH(nc, &net_clients, next) {
+ RxFilterInfoList *entry;
+ RxFilterInfo *info;
+
+ if (has_name && strcmp(nc->name, name) != 0) {
+ continue;
+ }
+
+ /* only query rx-filter information of NIC */
+ if (nc->info->type != NET_CLIENT_OPTIONS_KIND_NIC) {
+ if (has_name) {
+ error_setg(errp, "net client(%s) isn't a NIC", name);
+ return NULL;
+ }
+ continue;
+ }
+
+ if (nc->info->query_rx_filter) {
+ info = nc->info->query_rx_filter(nc);
+ entry = g_malloc0(sizeof(*entry));
+ entry->value = info;
+
+ if (!filter_list) {
+ filter_list = entry;
+ } else {
+ last_entry->next = entry;
+ }
+ last_entry = entry;
+ } else if (has_name) {
+ error_setg(errp, "net client(%s) doesn't support"
+ " rx-filter querying", name);
+ return NULL;
+ }
+
+ if (has_name) {
+ break;
+ }
+ }
+
+ if (filter_list == NULL && has_name) {
+ error_setg(errp, "invalid net client name: %s", name);
+ }
+
+ return filter_list;
+}
+
+void hmp_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, ERROR_CLASS_DEVICE_NOT_FOUND,
+ "Device '%s' 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);
+ }
+
+ if (nc->peer) {
+ /* Change peer link only if the peer is NIC and then notify peer.
+ * If the peer is a HUBPORT or a backend, we do not change the
+ * link status.
+ *
+ * This behavior 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->info->type == NET_CLIENT_OPTIONS_KIND_NIC) {
+ for (i = 0; i < queues; i++) {
+ ncs[i]->peer->link_down = !up;
+ }
+ }
+ if (nc->peer->info->link_status_changed) {
+ nc->peer->info->link_status_changed(nc->peer);
+ }
+ }
+}
+
+static void net_vm_change_state_handler(void *opaque, int running,
+ RunState state)
+{
+ NetClientState *nc;
+ NetClientState *tmp;
+
+ QTAILQ_FOREACH_SAFE(nc, &net_clients, next, tmp) {
+ if (running) {
+ /* Flush queued packets and wake up backends. */
+ if (nc->peer && qemu_can_send_packet(nc)) {
+ qemu_flush_queued_packets(nc->peer);
+ }
+ } else {
+ /* Complete all queued packets, to guarantee we don't modify
+ * state later when VM is not running.
+ */
+ qemu_flush_or_purge_queued_packets(nc, true);
+ }
+ }
+}
+
+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);
+ }
+ }
+
+ qemu_del_vm_change_state_handler(net_change_state_entry);
+}
+
+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(void *dummy, QemuOpts *opts, Error **errp)
+{
+ Error *local_err = NULL;
+
+ net_client_init(opts, 0, &local_err);
+ if (local_err) {
+ error_report_err(local_err);
+ return -1;
+ }
+
+ return 0;
+}
+
+static int net_init_netdev(void *dummy, QemuOpts *opts, Error **errp)
+{
+ Error *local_err = NULL;
+ int ret;
+
+ ret = net_client_init(opts, 1, &local_err);
+ if (local_err) {
+ error_report_err(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", &error_abort);
+#ifdef CONFIG_SLIRP
+ qemu_opts_set(net, NULL, "type", "user", &error_abort);
+#endif
+ }
+
+ net_change_state_entry =
+ qemu_add_vm_change_state_handler(net_vm_change_state_handler, NULL);
+
+ QTAILQ_INIT(&net_clients);
+
+ if (qemu_opts_foreach(qemu_find_opts("netdev"),
+ net_init_netdev, NULL, NULL)) {
+ return -1;
+ }
+
+ if (qemu_opts_foreach(net, net_init_client, NULL, NULL)) {
+ 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_noisily(opts_list, optarg, true)) {
+ 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 */ }
+ },
+};
Code Review / kvmfornfv.git / blobdiff