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/*
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* QEMU System Emulator
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*
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* Copyright (c) 2003-2008 Fabrice Bellard
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* Copyright (c) 2009 Red Hat, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "tap_int.h" |
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#include "config-host.h" |
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#include <sys/ioctl.h> |
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#include <sys/stat.h> |
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#include <sys/wait.h> |
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#include <sys/socket.h> |
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#include <net/if.h> |
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#include "net/net.h" |
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#include "clients.h" |
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#include "monitor/monitor.h" |
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#include "sysemu.h" |
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#include "qemu-common.h" |
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#include "qemu/error-report.h" |
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#include "net/tap.h" |
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#include "hw/vhost_net.h" |
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/* Maximum GSO packet size (64k) plus plenty of room for
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* the ethernet and virtio_net headers
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*/
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#define TAP_BUFSIZE (4096 + 65536) |
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typedef struct TAPState { |
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NetClientState nc; |
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int fd;
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char down_script[1024]; |
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char down_script_arg[128]; |
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uint8_t buf[TAP_BUFSIZE]; |
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unsigned int read_poll : 1; |
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unsigned int write_poll : 1; |
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unsigned int using_vnet_hdr : 1; |
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unsigned int has_ufo: 1; |
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VHostNetState *vhost_net; |
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unsigned host_vnet_hdr_len;
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} TAPState; |
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static int launch_script(const char *setup_script, const char *ifname, int fd); |
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static int tap_can_send(void *opaque); |
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static void tap_send(void *opaque); |
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static void tap_writable(void *opaque); |
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static void tap_update_fd_handler(TAPState *s) |
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{ |
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qemu_set_fd_handler2(s->fd, |
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s->read_poll ? tap_can_send : NULL,
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s->read_poll ? tap_send : NULL,
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s->write_poll ? tap_writable : NULL,
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s); |
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} |
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static void tap_read_poll(TAPState *s, int enable) |
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{ |
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s->read_poll = !!enable; |
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tap_update_fd_handler(s); |
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} |
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static void tap_write_poll(TAPState *s, int enable) |
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{ |
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s->write_poll = !!enable; |
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tap_update_fd_handler(s); |
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} |
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static void tap_writable(void *opaque) |
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{ |
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TAPState *s = opaque; |
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tap_write_poll(s, 0);
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qemu_flush_queued_packets(&s->nc); |
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} |
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static ssize_t tap_write_packet(TAPState *s, const struct iovec *iov, int iovcnt) |
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{ |
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ssize_t len; |
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do {
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len = writev(s->fd, iov, iovcnt); |
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} while (len == -1 && errno == EINTR); |
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if (len == -1 && errno == EAGAIN) { |
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tap_write_poll(s, 1);
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return 0; |
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} |
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return len;
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} |
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static ssize_t tap_receive_iov(NetClientState *nc, const struct iovec *iov, |
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int iovcnt)
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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const struct iovec *iovp = iov; |
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struct iovec iov_copy[iovcnt + 1]; |
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struct virtio_net_hdr_mrg_rxbuf hdr = { };
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if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
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iov_copy[0].iov_base = &hdr;
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iov_copy[0].iov_len = s->host_vnet_hdr_len;
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memcpy(&iov_copy[1], iov, iovcnt * sizeof(*iov)); |
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iovp = iov_copy; |
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iovcnt++; |
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} |
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return tap_write_packet(s, iovp, iovcnt);
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} |
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static ssize_t tap_receive_raw(NetClientState *nc, const uint8_t *buf, size_t size) |
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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struct iovec iov[2]; |
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int iovcnt = 0; |
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struct virtio_net_hdr_mrg_rxbuf hdr = { };
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if (s->host_vnet_hdr_len) {
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iov[iovcnt].iov_base = &hdr; |
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iov[iovcnt].iov_len = s->host_vnet_hdr_len; |
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iovcnt++; |
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} |
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iov[iovcnt].iov_base = (char *)buf;
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iov[iovcnt].iov_len = size; |
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iovcnt++; |
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return tap_write_packet(s, iov, iovcnt);
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} |
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static ssize_t tap_receive(NetClientState *nc, const uint8_t *buf, size_t size) |
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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struct iovec iov[1]; |
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if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
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return tap_receive_raw(nc, buf, size);
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} |
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iov[0].iov_base = (char *)buf; |
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iov[0].iov_len = size;
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return tap_write_packet(s, iov, 1); |
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} |
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static int tap_can_send(void *opaque) |
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{ |
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TAPState *s = opaque; |
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return qemu_can_send_packet(&s->nc);
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} |
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#ifndef __sun__
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ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen) |
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{ |
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return read(tapfd, buf, maxlen);
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} |
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#endif
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static void tap_send_completed(NetClientState *nc, ssize_t len) |
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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tap_read_poll(s, 1);
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} |
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static void tap_send(void *opaque) |
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{ |
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TAPState *s = opaque; |
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int size;
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do {
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uint8_t *buf = s->buf; |
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size = tap_read_packet(s->fd, s->buf, sizeof(s->buf));
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if (size <= 0) { |
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break;
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} |
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if (s->host_vnet_hdr_len && !s->using_vnet_hdr) {
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buf += s->host_vnet_hdr_len; |
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size -= s->host_vnet_hdr_len; |
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} |
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size = qemu_send_packet_async(&s->nc, buf, size, tap_send_completed); |
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if (size == 0) { |
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tap_read_poll(s, 0);
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} |
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} while (size > 0 && qemu_can_send_packet(&s->nc)); |
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} |
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int tap_has_ufo(NetClientState *nc)
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP); |
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return s->has_ufo;
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} |
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int tap_has_vnet_hdr(NetClientState *nc)
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP); |
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return !!s->host_vnet_hdr_len;
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} |
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int tap_has_vnet_hdr_len(NetClientState *nc, int len) |
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP); |
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return tap_probe_vnet_hdr_len(s->fd, len);
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} |
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void tap_set_vnet_hdr_len(NetClientState *nc, int len) |
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP); |
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assert(len == sizeof(struct virtio_net_hdr_mrg_rxbuf) || |
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len == sizeof(struct virtio_net_hdr)); |
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tap_fd_set_vnet_hdr_len(s->fd, len); |
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s->host_vnet_hdr_len = len; |
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} |
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void tap_using_vnet_hdr(NetClientState *nc, int using_vnet_hdr) |
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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using_vnet_hdr = using_vnet_hdr != 0;
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assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP); |
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assert(!!s->host_vnet_hdr_len == using_vnet_hdr); |
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s->using_vnet_hdr = using_vnet_hdr; |
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} |
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void tap_set_offload(NetClientState *nc, int csum, int tso4, |
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int tso6, int ecn, int ufo) |
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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if (s->fd < 0) { |
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return;
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} |
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tap_fd_set_offload(s->fd, csum, tso4, tso6, ecn, ufo); |
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} |
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static void tap_cleanup(NetClientState *nc) |
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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if (s->vhost_net) {
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vhost_net_cleanup(s->vhost_net); |
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s->vhost_net = NULL;
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} |
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qemu_purge_queued_packets(nc); |
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if (s->down_script[0]) |
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launch_script(s->down_script, s->down_script_arg, s->fd); |
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tap_read_poll(s, 0);
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tap_write_poll(s, 0);
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close(s->fd); |
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s->fd = -1;
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} |
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static void tap_poll(NetClientState *nc, bool enable) |
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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tap_read_poll(s, enable); |
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tap_write_poll(s, enable); |
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} |
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int tap_get_fd(NetClientState *nc)
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{ |
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TAPState *s = DO_UPCAST(TAPState, nc, nc); |
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assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP); |
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return s->fd;
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} |
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/* fd support */
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static NetClientInfo net_tap_info = {
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.type = NET_CLIENT_OPTIONS_KIND_TAP, |
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.size = sizeof(TAPState),
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.receive = tap_receive, |
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.receive_raw = tap_receive_raw, |
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.receive_iov = tap_receive_iov, |
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.poll = tap_poll, |
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.cleanup = tap_cleanup, |
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}; |
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static TAPState *net_tap_fd_init(NetClientState *peer,
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const char *model, |
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const char *name, |
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int fd,
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int vnet_hdr)
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{ |
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NetClientState *nc; |
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TAPState *s; |
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nc = qemu_new_net_client(&net_tap_info, peer, model, name); |
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s = DO_UPCAST(TAPState, nc, nc); |
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s->fd = fd; |
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s->host_vnet_hdr_len = vnet_hdr ? sizeof(struct virtio_net_hdr) : 0; |
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s->using_vnet_hdr = 0;
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s->has_ufo = tap_probe_has_ufo(s->fd); |
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tap_set_offload(&s->nc, 0, 0, 0, 0, 0); |
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/*
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* Make sure host header length is set correctly in tap:
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* it might have been modified by another instance of qemu.
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*/
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if (tap_probe_vnet_hdr_len(s->fd, s->host_vnet_hdr_len)) {
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tap_fd_set_vnet_hdr_len(s->fd, s->host_vnet_hdr_len); |
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} |
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tap_read_poll(s, 1);
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s->vhost_net = NULL;
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return s;
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} |
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static int launch_script(const char *setup_script, const char *ifname, int fd) |
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{ |
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int pid, status;
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char *args[3]; |
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char **parg;
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/* try to launch network script */
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pid = fork(); |
363 |
if (pid == 0) { |
364 |
int open_max = sysconf(_SC_OPEN_MAX), i;
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366 |
for (i = 0; i < open_max; i++) { |
367 |
if (i != STDIN_FILENO &&
|
368 |
i != STDOUT_FILENO && |
369 |
i != STDERR_FILENO && |
370 |
i != fd) { |
371 |
close(i); |
372 |
} |
373 |
} |
374 |
parg = args; |
375 |
*parg++ = (char *)setup_script;
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376 |
*parg++ = (char *)ifname;
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377 |
*parg = NULL;
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378 |
execv(setup_script, args); |
379 |
_exit(1);
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380 |
} else if (pid > 0) { |
381 |
while (waitpid(pid, &status, 0) != pid) { |
382 |
/* loop */
|
383 |
} |
384 |
|
385 |
if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { |
386 |
return 0; |
387 |
} |
388 |
} |
389 |
fprintf(stderr, "%s: could not launch network script\n", setup_script);
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return -1; |
391 |
} |
392 |
|
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static int recv_fd(int c) |
394 |
{ |
395 |
int fd;
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396 |
uint8_t msgbuf[CMSG_SPACE(sizeof(fd))];
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397 |
struct msghdr msg = {
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398 |
.msg_control = msgbuf, |
399 |
.msg_controllen = sizeof(msgbuf),
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400 |
}; |
401 |
struct cmsghdr *cmsg;
|
402 |
struct iovec iov;
|
403 |
uint8_t req[1];
|
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ssize_t len; |
405 |
|
406 |
cmsg = CMSG_FIRSTHDR(&msg); |
407 |
cmsg->cmsg_level = SOL_SOCKET; |
408 |
cmsg->cmsg_type = SCM_RIGHTS; |
409 |
cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
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410 |
msg.msg_controllen = cmsg->cmsg_len; |
411 |
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412 |
iov.iov_base = req; |
413 |
iov.iov_len = sizeof(req);
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414 |
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415 |
msg.msg_iov = &iov; |
416 |
msg.msg_iovlen = 1;
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417 |
|
418 |
len = recvmsg(c, &msg, 0);
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419 |
if (len > 0) { |
420 |
memcpy(&fd, CMSG_DATA(cmsg), sizeof(fd));
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421 |
return fd;
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422 |
} |
423 |
|
424 |
return len;
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425 |
} |
426 |
|
427 |
static int net_bridge_run_helper(const char *helper, const char *bridge) |
428 |
{ |
429 |
sigset_t oldmask, mask; |
430 |
int pid, status;
|
431 |
char *args[5]; |
432 |
char **parg;
|
433 |
int sv[2]; |
434 |
|
435 |
sigemptyset(&mask); |
436 |
sigaddset(&mask, SIGCHLD); |
437 |
sigprocmask(SIG_BLOCK, &mask, &oldmask); |
438 |
|
439 |
if (socketpair(PF_UNIX, SOCK_STREAM, 0, sv) == -1) { |
440 |
return -1; |
441 |
} |
442 |
|
443 |
/* try to launch bridge helper */
|
444 |
pid = fork(); |
445 |
if (pid == 0) { |
446 |
int open_max = sysconf(_SC_OPEN_MAX), i;
|
447 |
char fd_buf[6+10]; |
448 |
char br_buf[6+IFNAMSIZ] = {0}; |
449 |
char helper_cmd[PATH_MAX + sizeof(fd_buf) + sizeof(br_buf) + 15]; |
450 |
|
451 |
for (i = 0; i < open_max; i++) { |
452 |
if (i != STDIN_FILENO &&
|
453 |
i != STDOUT_FILENO && |
454 |
i != STDERR_FILENO && |
455 |
i != sv[1]) {
|
456 |
close(i); |
457 |
} |
458 |
} |
459 |
|
460 |
snprintf(fd_buf, sizeof(fd_buf), "%s%d", "--fd=", sv[1]); |
461 |
|
462 |
if (strrchr(helper, ' ') || strrchr(helper, '\t')) { |
463 |
/* assume helper is a command */
|
464 |
|
465 |
if (strstr(helper, "--br=") == NULL) { |
466 |
snprintf(br_buf, sizeof(br_buf), "%s%s", "--br=", bridge); |
467 |
} |
468 |
|
469 |
snprintf(helper_cmd, sizeof(helper_cmd), "%s %s %s %s", |
470 |
helper, "--use-vnet", fd_buf, br_buf);
|
471 |
|
472 |
parg = args; |
473 |
*parg++ = (char *)"sh"; |
474 |
*parg++ = (char *)"-c"; |
475 |
*parg++ = helper_cmd; |
476 |
*parg++ = NULL;
|
477 |
|
478 |
execv("/bin/sh", args);
|
479 |
} else {
|
480 |
/* assume helper is just the executable path name */
|
481 |
|
482 |
snprintf(br_buf, sizeof(br_buf), "%s%s", "--br=", bridge); |
483 |
|
484 |
parg = args; |
485 |
*parg++ = (char *)helper;
|
486 |
*parg++ = (char *)"--use-vnet"; |
487 |
*parg++ = fd_buf; |
488 |
*parg++ = br_buf; |
489 |
*parg++ = NULL;
|
490 |
|
491 |
execv(helper, args); |
492 |
} |
493 |
_exit(1);
|
494 |
|
495 |
} else if (pid > 0) { |
496 |
int fd;
|
497 |
|
498 |
close(sv[1]);
|
499 |
|
500 |
do {
|
501 |
fd = recv_fd(sv[0]);
|
502 |
} while (fd == -1 && errno == EINTR); |
503 |
|
504 |
close(sv[0]);
|
505 |
|
506 |
while (waitpid(pid, &status, 0) != pid) { |
507 |
/* loop */
|
508 |
} |
509 |
sigprocmask(SIG_SETMASK, &oldmask, NULL);
|
510 |
if (fd < 0) { |
511 |
fprintf(stderr, "failed to recv file descriptor\n");
|
512 |
return -1; |
513 |
} |
514 |
|
515 |
if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { |
516 |
return fd;
|
517 |
} |
518 |
} |
519 |
fprintf(stderr, "failed to launch bridge helper\n");
|
520 |
return -1; |
521 |
} |
522 |
|
523 |
int net_init_bridge(const NetClientOptions *opts, const char *name, |
524 |
NetClientState *peer) |
525 |
{ |
526 |
const NetdevBridgeOptions *bridge;
|
527 |
const char *helper, *br; |
528 |
|
529 |
TAPState *s; |
530 |
int fd, vnet_hdr;
|
531 |
|
532 |
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_BRIDGE); |
533 |
bridge = opts->bridge; |
534 |
|
535 |
helper = bridge->has_helper ? bridge->helper : DEFAULT_BRIDGE_HELPER; |
536 |
br = bridge->has_br ? bridge->br : DEFAULT_BRIDGE_INTERFACE; |
537 |
|
538 |
fd = net_bridge_run_helper(helper, br); |
539 |
if (fd == -1) { |
540 |
return -1; |
541 |
} |
542 |
|
543 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
544 |
|
545 |
vnet_hdr = tap_probe_vnet_hdr(fd); |
546 |
|
547 |
s = net_tap_fd_init(peer, "bridge", name, fd, vnet_hdr);
|
548 |
if (!s) {
|
549 |
close(fd); |
550 |
return -1; |
551 |
} |
552 |
|
553 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s,br=%s", helper, |
554 |
br); |
555 |
|
556 |
return 0; |
557 |
} |
558 |
|
559 |
static int net_tap_init(const NetdevTapOptions *tap, int *vnet_hdr, |
560 |
const char *setup_script, char *ifname, |
561 |
size_t ifname_sz) |
562 |
{ |
563 |
int fd, vnet_hdr_required;
|
564 |
|
565 |
if (tap->has_ifname) {
|
566 |
pstrcpy(ifname, ifname_sz, tap->ifname); |
567 |
} else {
|
568 |
assert(ifname_sz > 0);
|
569 |
ifname[0] = '\0'; |
570 |
} |
571 |
|
572 |
if (tap->has_vnet_hdr) {
|
573 |
*vnet_hdr = tap->vnet_hdr; |
574 |
vnet_hdr_required = *vnet_hdr; |
575 |
} else {
|
576 |
*vnet_hdr = 1;
|
577 |
vnet_hdr_required = 0;
|
578 |
} |
579 |
|
580 |
TFR(fd = tap_open(ifname, ifname_sz, vnet_hdr, vnet_hdr_required)); |
581 |
if (fd < 0) { |
582 |
return -1; |
583 |
} |
584 |
|
585 |
if (setup_script &&
|
586 |
setup_script[0] != '\0' && |
587 |
strcmp(setup_script, "no") != 0 && |
588 |
launch_script(setup_script, ifname, fd)) { |
589 |
close(fd); |
590 |
return -1; |
591 |
} |
592 |
|
593 |
return fd;
|
594 |
} |
595 |
|
596 |
int net_init_tap(const NetClientOptions *opts, const char *name, |
597 |
NetClientState *peer) |
598 |
{ |
599 |
const NetdevTapOptions *tap;
|
600 |
|
601 |
int fd, vnet_hdr = 0; |
602 |
const char *model; |
603 |
TAPState *s; |
604 |
|
605 |
/* for the no-fd, no-helper case */
|
606 |
const char *script = NULL; /* suppress wrong "uninit'd use" gcc warning */ |
607 |
char ifname[128]; |
608 |
|
609 |
assert(opts->kind == NET_CLIENT_OPTIONS_KIND_TAP); |
610 |
tap = opts->tap; |
611 |
|
612 |
if (tap->has_fd) {
|
613 |
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
|
614 |
tap->has_vnet_hdr || tap->has_helper) { |
615 |
error_report("ifname=, script=, downscript=, vnet_hdr=, "
|
616 |
"and helper= are invalid with fd=");
|
617 |
return -1; |
618 |
} |
619 |
|
620 |
fd = monitor_handle_fd_param(cur_mon, tap->fd); |
621 |
if (fd == -1) { |
622 |
return -1; |
623 |
} |
624 |
|
625 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
626 |
|
627 |
vnet_hdr = tap_probe_vnet_hdr(fd); |
628 |
|
629 |
model = "tap";
|
630 |
|
631 |
} else if (tap->has_helper) { |
632 |
if (tap->has_ifname || tap->has_script || tap->has_downscript ||
|
633 |
tap->has_vnet_hdr) { |
634 |
error_report("ifname=, script=, downscript=, and vnet_hdr= "
|
635 |
"are invalid with helper=");
|
636 |
return -1; |
637 |
} |
638 |
|
639 |
fd = net_bridge_run_helper(tap->helper, DEFAULT_BRIDGE_INTERFACE); |
640 |
if (fd == -1) { |
641 |
return -1; |
642 |
} |
643 |
|
644 |
fcntl(fd, F_SETFL, O_NONBLOCK); |
645 |
|
646 |
vnet_hdr = tap_probe_vnet_hdr(fd); |
647 |
|
648 |
model = "bridge";
|
649 |
|
650 |
} else {
|
651 |
script = tap->has_script ? tap->script : DEFAULT_NETWORK_SCRIPT; |
652 |
fd = net_tap_init(tap, &vnet_hdr, script, ifname, sizeof ifname);
|
653 |
if (fd == -1) { |
654 |
return -1; |
655 |
} |
656 |
|
657 |
model = "tap";
|
658 |
} |
659 |
|
660 |
s = net_tap_fd_init(peer, model, name, fd, vnet_hdr); |
661 |
if (!s) {
|
662 |
close(fd); |
663 |
return -1; |
664 |
} |
665 |
|
666 |
if (tap_set_sndbuf(s->fd, tap) < 0) { |
667 |
return -1; |
668 |
} |
669 |
|
670 |
if (tap->has_fd) {
|
671 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str), "fd=%d", fd); |
672 |
} else if (tap->has_helper) { |
673 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str), "helper=%s", |
674 |
tap->helper); |
675 |
} else {
|
676 |
const char *downscript; |
677 |
|
678 |
downscript = tap->has_downscript ? tap->downscript : |
679 |
DEFAULT_NETWORK_DOWN_SCRIPT; |
680 |
|
681 |
snprintf(s->nc.info_str, sizeof(s->nc.info_str),
|
682 |
"ifname=%s,script=%s,downscript=%s", ifname, script,
|
683 |
downscript); |
684 |
|
685 |
if (strcmp(downscript, "no") != 0) { |
686 |
snprintf(s->down_script, sizeof(s->down_script), "%s", downscript); |
687 |
snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname); |
688 |
} |
689 |
} |
690 |
|
691 |
if (tap->has_vhost ? tap->vhost :
|
692 |
tap->has_vhostfd || (tap->has_vhostforce && tap->vhostforce)) { |
693 |
int vhostfd;
|
694 |
|
695 |
if (tap->has_vhostfd) {
|
696 |
vhostfd = monitor_handle_fd_param(cur_mon, tap->vhostfd); |
697 |
if (vhostfd == -1) { |
698 |
return -1; |
699 |
} |
700 |
} else {
|
701 |
vhostfd = -1;
|
702 |
} |
703 |
|
704 |
s->vhost_net = vhost_net_init(&s->nc, vhostfd, |
705 |
tap->has_vhostforce && tap->vhostforce); |
706 |
if (!s->vhost_net) {
|
707 |
error_report("vhost-net requested but could not be initialized");
|
708 |
return -1; |
709 |
} |
710 |
} else if (tap->has_vhostfd) { |
711 |
error_report("vhostfd= is not valid without vhost");
|
712 |
return -1; |
713 |
} |
714 |
|
715 |
return 0; |
716 |
} |
717 |
|
718 |
VHostNetState *tap_get_vhost_net(NetClientState *nc) |
719 |
{ |
720 |
TAPState *s = DO_UPCAST(TAPState, nc, nc); |
721 |
assert(nc->info->type == NET_CLIENT_OPTIONS_KIND_TAP); |
722 |
return s->vhost_net;
|
723 |
} |