diff options
Diffstat (limited to 'qemu/net/net.c')
| -rw-r--r-- | qemu/net/net.c | 1575 |
1 files changed, 0 insertions, 1575 deletions
diff --git a/qemu/net/net.c b/qemu/net/net.c deleted file mode 100644 index 0ad6217cb..000000000 --- a/qemu/net/net.c +++ /dev/null @@ -1,1575 +0,0 @@ -/* - * 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 "qemu/osdep.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/help_option.h" -#include "qapi/qmp/qerror.h" -#include "qemu/error-report.h" -#include "qemu/sockets.h" -#include "qemu/cutils.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 "sysemu/sysemu.h" -#include "net/filter.h" -#include "qapi/string-output-visitor.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 */ - -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(qemu_deliver_packet_iov, nc); - nc->destructor = destructor; - QTAILQ_INIT(&nc->filters); -} - -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; - NetFilterState *nf, *next; - - 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); - - QTAILQ_FOREACH_SAFE(nf, &nc->filters, next, next) { - object_unparent(OBJECT(nf)); - } - - /* 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) -{ -#ifdef HOST_WORDS_BIGENDIAN - if (!nc || !nc->info->set_vnet_le) { - return -ENOSYS; - } - - return nc->info->set_vnet_le(nc, is_le); -#else - return 0; -#endif -} - -int qemu_set_vnet_be(NetClientState *nc, bool is_be) -{ -#ifdef HOST_WORDS_BIGENDIAN - return 0; -#else - if (!nc || !nc->info->set_vnet_be) { - return -ENOSYS; - } - - return nc->info->set_vnet_be(nc, is_be); -#endif -} - -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; -} - -static ssize_t filter_receive_iov(NetClientState *nc, - NetFilterDirection direction, - NetClientState *sender, - unsigned flags, - const struct iovec *iov, - int iovcnt, - NetPacketSent *sent_cb) -{ - ssize_t ret = 0; - NetFilterState *nf = NULL; - - if (direction == NET_FILTER_DIRECTION_TX) { - QTAILQ_FOREACH(nf, &nc->filters, next) { - ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, - iovcnt, sent_cb); - if (ret) { - return ret; - } - } - } else { - QTAILQ_FOREACH_REVERSE(nf, &nc->filters, NetFilterHead, next) { - ret = qemu_netfilter_receive(nf, direction, sender, flags, iov, - iovcnt, sent_cb); - if (ret) { - return ret; - } - } - } - - return ret; -} - -static ssize_t filter_receive(NetClientState *nc, - NetFilterDirection direction, - NetClientState *sender, - unsigned flags, - const uint8_t *data, - size_t size, - NetPacketSent *sent_cb) -{ - struct iovec iov = { - .iov_base = (void *)data, - .iov_len = size - }; - - return filter_receive_iov(nc, direction, sender, flags, &iov, 1, sent_cb); -} - -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; - int ret; - -#ifdef DEBUG_NET - printf("qemu_send_packet_async:\n"); - qemu_hexdump((const char *)buf, stdout, "net", size); -#endif - - if (sender->link_down || !sender->peer) { - return size; - } - - /* Let filters handle the packet first */ - ret = filter_receive(sender, NET_FILTER_DIRECTION_TX, - sender, flags, buf, size, sent_cb); - if (ret) { - return ret; - } - - ret = filter_receive(sender->peer, NET_FILTER_DIRECTION_RX, - sender, flags, buf, size, sent_cb); - if (ret) { - return ret; - } - - 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, unsigned flags) -{ - uint8_t *buf = NULL; - uint8_t *buffer; - size_t offset; - ssize_t ret; - - if (iovcnt == 1) { - buffer = iov[0].iov_base; - offset = iov[0].iov_len; - } else { - buf = g_new(uint8_t, NET_BUFSIZE); - buffer = buf; - offset = iov_to_buf(iov, iovcnt, 0, buf, NET_BUFSIZE); - } - - if (flags & QEMU_NET_PACKET_FLAG_RAW && nc->info->receive_raw) { - ret = nc->info->receive_raw(nc, buffer, offset); - } else { - ret = nc->info->receive(nc, buffer, offset); - } - - g_free(buf); - return ret; -} - -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, flags); - } - - 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; - int ret; - - if (sender->link_down || !sender->peer) { - return iov_size(iov, iovcnt); - } - - /* Let filters handle the packet first */ - ret = filter_receive_iov(sender, NET_FILTER_DIRECTION_TX, sender, - QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); - if (ret) { - return ret; - } - - ret = filter_receive_iov(sender->peer, NET_FILTER_DIRECTION_RX, sender, - QEMU_NET_PACKET_FLAG_NONE, iov, iovcnt, sent_cb); - if (ret) { - return ret; - } - - 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->type == NET_CLIENT_OPTIONS_KIND_NIC); - nic = opts->u.nic.data; - - 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->type == NET_CLIENT_OPTIONS_KIND_DUMP || - opts->type == NET_CLIENT_OPTIONS_KIND_NIC || - !net_client_init_fun[opts->type]) { - 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->type == NET_CLIENT_OPTIONS_KIND_NONE) { - return 0; /* nothing to do */ - } - if (opts->type == NET_CLIENT_OPTIONS_KIND_HUBPORT) { - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, "type", - "a net type"); - return -1; - } - - if (!net_client_init_fun[opts->type]) { - 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->type != NET_CLIENT_OPTIONS_KIND_NIC || - !opts->u.nic.data->has_netdev) { - peer = net_hub_add_port(net->has_vlan ? net->vlan : 0, NULL); - } - } - - if (net_client_init_fun[opts->type](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->type]); - } - return -1; - } - return 0; -} - - -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); - Visitor *v = opts_get_visitor(ov); - - { - /* Parse convenience option format ip6-net=fec0::0[/64] */ - const char *ip6_net = qemu_opt_get(opts, "ipv6-net"); - - if (ip6_net) { - char buf[strlen(ip6_net) + 1]; - - if (get_str_sep(buf, sizeof(buf), &ip6_net, '/') < 0) { - /* Default 64bit prefix length. */ - qemu_opt_set(opts, "ipv6-prefix", ip6_net, &error_abort); - qemu_opt_set_number(opts, "ipv6-prefixlen", 64, &error_abort); - } else { - /* User-specified prefix length. */ - unsigned long len; - int err; - - qemu_opt_set(opts, "ipv6-prefix", buf, &error_abort); - err = qemu_strtoul(ip6_net, NULL, 10, &len); - - if (err) { - error_setg(errp, QERR_INVALID_PARAMETER_VALUE, - "ipv6-prefix", "a number"); - } else { - qemu_opt_set_number(opts, "ipv6-prefixlen", len, - &error_abort); - } - } - qemu_opt_unset(opts, "ipv6-net"); - } - } - - if (is_netdev) { - visit_type_Netdev(v, NULL, (Netdev **)&object, &err); - } else { - visit_type_NetLegacy(v, NULL, (NetLegacy **)&object, &err); - } - - if (!err) { - ret = net_client_init1(object, is_netdev, &err); - } - - if (is_netdev) { - qapi_free_Netdev(object); - } else { - qapi_free_NetLegacy(object); - } - - error_propagate(errp, err); - opts_visitor_cleanup(ov); - 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); -} - -static void netfilter_print_info(Monitor *mon, NetFilterState *nf) -{ - char *str; - ObjectProperty *prop; - ObjectPropertyIterator iter; - StringOutputVisitor *ov; - - /* generate info str */ - object_property_iter_init(&iter, OBJECT(nf)); - while ((prop = object_property_iter_next(&iter))) { - if (!strcmp(prop->name, "type")) { - continue; - } - ov = string_output_visitor_new(false); - object_property_get(OBJECT(nf), string_output_get_visitor(ov), - prop->name, NULL); - str = string_output_get_string(ov); - string_output_visitor_cleanup(ov); - monitor_printf(mon, ",%s=%s", prop->name, str); - g_free(str); - } - monitor_printf(mon, "\n"); -} - -void print_net_client(Monitor *mon, NetClientState *nc) -{ - NetFilterState *nf; - - monitor_printf(mon, "%s: index=%d,type=%s,%s\n", nc->name, - nc->queue_index, - NetClientOptionsKind_lookup[nc->info->type], - nc->info_str); - if (!QTAILQ_EMPTY(&nc->filters)) { - monitor_printf(mon, "filters:\n"); - } - QTAILQ_FOREACH(nf, &nc->filters, next) { - char *path = object_get_canonical_path_component(OBJECT(nf)); - - monitor_printf(mon, " - %s: type=%s", path, - object_get_typename(OBJECT(nf))); - netfilter_print_info(mon, nf); - g_free(path); - } -} - -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; - } - - /* only query information on queue 0 since the info is per nic, - * not per queue - */ - if (nc->queue_index != 0) - 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 */ } - }, -}; |