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Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>remotes/github/stable-0.12
Mark McLoughlin
17 years ago
committed by
Anthony Liguori
Anthony Liguori
4 changed files with 763 additions and 691 deletions
@ -0,0 +1,759 @@ |
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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 "net/tap.h" |
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#include "config-host.h" |
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#include <signal.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 <net/if.h> |
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#include "net.h" |
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#include "sysemu.h" |
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#include "qemu-char.h" |
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#include "qemu-common.h" |
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#ifdef __linux__ |
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#include "net/tap-linux.h" |
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#endif |
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#ifdef __NetBSD__ |
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#include <net/if_tap.h> |
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#endif |
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#ifdef CONFIG_BSD |
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#if defined(__FreeBSD__) || defined(__DragonFly__) |
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#include <libutil.h> |
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#else |
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#include <util.h> |
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#endif |
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#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__) |
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#include <freebsd/stdlib.h> |
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#endif |
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#if defined(__OpenBSD__) |
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#include <util.h> |
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#endif |
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#ifdef __sun__ |
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#include <sys/stat.h> |
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#include <sys/ethernet.h> |
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#include <sys/sockio.h> |
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#include <netinet/arp.h> |
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#include <netinet/in.h> |
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#include <netinet/in_systm.h> |
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#include <netinet/ip.h> |
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#include <netinet/ip_icmp.h> // must come after ip.h |
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#include <netinet/udp.h> |
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#include <netinet/tcp.h> |
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#include <net/if.h> |
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#include <syslog.h> |
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#include <stropts.h> |
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#endif |
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#if !defined(_AIX) |
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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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VLANClientState *vc; |
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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 has_vnet_hdr : 1; |
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unsigned int using_vnet_hdr : 1; |
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unsigned int has_ufo: 1; |
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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->vc); |
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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(VLANClientState *vc, const struct iovec *iov, |
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int iovcnt) |
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{ |
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TAPState *s = vc->opaque; |
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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 hdr = { 0, }; |
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if (s->has_vnet_hdr && !s->using_vnet_hdr) { |
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iov_copy[0].iov_base = &hdr; |
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iov_copy[0].iov_len = sizeof(hdr); |
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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(VLANClientState *vc, const uint8_t *buf, size_t size) |
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{ |
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TAPState *s = vc->opaque; |
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struct iovec iov[2]; |
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int iovcnt = 0; |
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struct virtio_net_hdr hdr = { 0, }; |
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if (s->has_vnet_hdr) { |
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iov[iovcnt].iov_base = &hdr; |
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iov[iovcnt].iov_len = sizeof(hdr); |
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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(VLANClientState *vc, const uint8_t *buf, size_t size) |
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{ |
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TAPState *s = vc->opaque; |
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struct iovec iov[1]; |
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if (s->has_vnet_hdr && !s->using_vnet_hdr) { |
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return tap_receive_raw(vc, 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->vc); |
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} |
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#ifdef __sun__ |
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static ssize_t tap_read_packet(int tapfd, uint8_t *buf, int maxlen) |
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{ |
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struct strbuf sbuf; |
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int f = 0; |
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sbuf.maxlen = maxlen; |
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sbuf.buf = (char *)buf; |
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return getmsg(tapfd, NULL, &sbuf, &f) >= 0 ? sbuf.len : -1; |
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} |
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#else |
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static 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(VLANClientState *vc, ssize_t len) |
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{ |
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TAPState *s = vc->opaque; |
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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->has_vnet_hdr && !s->using_vnet_hdr) { |
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buf += sizeof(struct virtio_net_hdr); |
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size -= sizeof(struct virtio_net_hdr); |
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} |
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size = qemu_send_packet_async(s->vc, 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); |
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} |
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/* sndbuf should be set to a value lower than the tx queue
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* capacity of any destination network interface. |
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* Ethernet NICs generally have txqueuelen=1000, so 1Mb is |
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* a good default, given a 1500 byte MTU. |
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*/ |
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#define TAP_DEFAULT_SNDBUF 1024*1024 |
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static int tap_set_sndbuf(TAPState *s, QemuOpts *opts) |
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{ |
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int sndbuf; |
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sndbuf = qemu_opt_get_size(opts, "sndbuf", TAP_DEFAULT_SNDBUF); |
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if (!sndbuf) { |
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sndbuf = INT_MAX; |
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} |
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if (ioctl(s->fd, TUNSETSNDBUF, &sndbuf) == -1 && qemu_opt_get(opts, "sndbuf")) { |
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qemu_error("TUNSETSNDBUF ioctl failed: %s\n", strerror(errno)); |
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return -1; |
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} |
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return 0; |
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} |
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int tap_has_ufo(VLANClientState *vc) |
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{ |
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TAPState *s = vc->opaque; |
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assert(vc->type == NET_CLIENT_TYPE_TAP); |
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return s->has_ufo; |
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} |
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int tap_has_vnet_hdr(VLANClientState *vc) |
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{ |
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TAPState *s = vc->opaque; |
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assert(vc->type == NET_CLIENT_TYPE_TAP); |
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return s->has_vnet_hdr; |
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} |
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void tap_using_vnet_hdr(VLANClientState *vc, int using_vnet_hdr) |
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{ |
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TAPState *s = vc->opaque; |
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using_vnet_hdr = using_vnet_hdr != 0; |
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assert(vc->type == NET_CLIENT_TYPE_TAP); |
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assert(s->has_vnet_hdr == using_vnet_hdr); |
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s->using_vnet_hdr = using_vnet_hdr; |
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} |
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static int tap_probe_vnet_hdr(int fd) |
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{ |
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struct ifreq ifr; |
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if (ioctl(fd, TUNGETIFF, &ifr) != 0) { |
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qemu_error("TUNGETIFF ioctl() failed: %s\n", strerror(errno)); |
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return 0; |
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} |
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return ifr.ifr_flags & IFF_VNET_HDR; |
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} |
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void tap_set_offload(VLANClientState *vc, int csum, int tso4, |
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int tso6, int ecn, int ufo) |
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{ |
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TAPState *s = vc->opaque; |
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unsigned int offload = 0; |
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if (csum) { |
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offload |= TUN_F_CSUM; |
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if (tso4) |
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offload |= TUN_F_TSO4; |
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if (tso6) |
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offload |= TUN_F_TSO6; |
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if ((tso4 || tso6) && ecn) |
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offload |= TUN_F_TSO_ECN; |
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if (ufo) |
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offload |= TUN_F_UFO; |
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} |
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if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0) { |
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offload &= ~TUN_F_UFO; |
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if (ioctl(s->fd, TUNSETOFFLOAD, offload) != 0) { |
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fprintf(stderr, "TUNSETOFFLOAD ioctl() failed: %s\n", |
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strerror(errno)); |
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} |
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} |
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} |
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static void tap_cleanup(VLANClientState *vc) |
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{ |
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TAPState *s = vc->opaque; |
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qemu_purge_queued_packets(vc); |
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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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qemu_free(s); |
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} |
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/* fd support */ |
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static TAPState *net_tap_fd_init(VLANState *vlan, |
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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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TAPState *s; |
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unsigned int offload; |
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s = qemu_mallocz(sizeof(TAPState)); |
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s->fd = fd; |
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s->has_vnet_hdr = vnet_hdr != 0; |
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s->using_vnet_hdr = 0; |
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s->vc = qemu_new_vlan_client(NET_CLIENT_TYPE_TAP, |
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vlan, NULL, model, name, NULL, |
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tap_receive, tap_receive_raw, |
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tap_receive_iov, tap_cleanup, s); |
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s->has_ufo = 0; |
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/* Check if tap supports UFO */ |
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offload = TUN_F_CSUM | TUN_F_UFO; |
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if (ioctl(s->fd, TUNSETOFFLOAD, offload) == 0) |
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s->has_ufo = 1; |
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tap_set_offload(s->vc, 0, 0, 0, 0, 0); |
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tap_read_poll(s, 1); |
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return s; |
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} |
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#if defined (CONFIG_BSD) || defined (__FreeBSD_kernel__) |
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static int tap_open(char *ifname, int ifname_size, |
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int *vnet_hdr, int vnet_hdr_required) |
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{ |
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int fd; |
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char *dev; |
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struct stat s; |
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TFR(fd = open("/dev/tap", O_RDWR)); |
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if (fd < 0) { |
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fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n"); |
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return -1; |
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} |
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fstat(fd, &s); |
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dev = devname(s.st_rdev, S_IFCHR); |
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pstrcpy(ifname, ifname_size, dev); |
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fcntl(fd, F_SETFL, O_NONBLOCK); |
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return fd; |
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} |
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#elif defined(__sun__) |
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#define TUNNEWPPA (('T'<<16) | 0x0001) |
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/*
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* Allocate TAP device, returns opened fd. |
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* Stores dev name in the first arg(must be large enough). |
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*/ |
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static int tap_alloc(char *dev, size_t dev_size) |
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{ |
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int tap_fd, if_fd, ppa = -1; |
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static int ip_fd = 0; |
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char *ptr; |
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static int arp_fd = 0; |
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int ip_muxid, arp_muxid; |
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struct strioctl strioc_if, strioc_ppa; |
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int link_type = I_PLINK;; |
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struct lifreq ifr; |
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char actual_name[32] = ""; |
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memset(&ifr, 0x0, sizeof(ifr)); |
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if( *dev ){ |
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ptr = dev; |
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while( *ptr && !qemu_isdigit((int)*ptr) ) ptr++; |
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ppa = atoi(ptr); |
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} |
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/* Check if IP device was opened */ |
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if( ip_fd ) |
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close(ip_fd); |
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TFR(ip_fd = open("/dev/udp", O_RDWR, 0)); |
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if (ip_fd < 0) { |
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syslog(LOG_ERR, "Can't open /dev/ip (actually /dev/udp)"); |
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return -1; |
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} |
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TFR(tap_fd = open("/dev/tap", O_RDWR, 0)); |
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if (tap_fd < 0) { |
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syslog(LOG_ERR, "Can't open /dev/tap"); |
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return -1; |
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} |
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/* Assign a new PPA and get its unit number. */ |
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strioc_ppa.ic_cmd = TUNNEWPPA; |
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strioc_ppa.ic_timout = 0; |
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strioc_ppa.ic_len = sizeof(ppa); |
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strioc_ppa.ic_dp = (char *)&ppa; |
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if ((ppa = ioctl (tap_fd, I_STR, &strioc_ppa)) < 0) |
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syslog (LOG_ERR, "Can't assign new interface"); |
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TFR(if_fd = open("/dev/tap", O_RDWR, 0)); |
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if (if_fd < 0) { |
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syslog(LOG_ERR, "Can't open /dev/tap (2)"); |
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return -1; |
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} |
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if(ioctl(if_fd, I_PUSH, "ip") < 0){ |
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syslog(LOG_ERR, "Can't push IP module"); |
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return -1; |
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} |
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if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) < 0) |
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syslog(LOG_ERR, "Can't get flags\n"); |
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snprintf (actual_name, 32, "tap%d", ppa); |
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pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name); |
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ifr.lifr_ppa = ppa; |
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/* Assign ppa according to the unit number returned by tun device */ |
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if (ioctl (if_fd, SIOCSLIFNAME, &ifr) < 0) |
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syslog (LOG_ERR, "Can't set PPA %d", ppa); |
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if (ioctl(if_fd, SIOCGLIFFLAGS, &ifr) <0) |
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syslog (LOG_ERR, "Can't get flags\n"); |
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/* Push arp module to if_fd */ |
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if (ioctl (if_fd, I_PUSH, "arp") < 0) |
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syslog (LOG_ERR, "Can't push ARP module (2)"); |
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/* Push arp module to ip_fd */ |
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if (ioctl (ip_fd, I_POP, NULL) < 0) |
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syslog (LOG_ERR, "I_POP failed\n"); |
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if (ioctl (ip_fd, I_PUSH, "arp") < 0) |
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syslog (LOG_ERR, "Can't push ARP module (3)\n"); |
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/* Open arp_fd */ |
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TFR(arp_fd = open ("/dev/tap", O_RDWR, 0)); |
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if (arp_fd < 0) |
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syslog (LOG_ERR, "Can't open %s\n", "/dev/tap"); |
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/* Set ifname to arp */ |
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strioc_if.ic_cmd = SIOCSLIFNAME; |
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strioc_if.ic_timout = 0; |
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strioc_if.ic_len = sizeof(ifr); |
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strioc_if.ic_dp = (char *)𝔦 |
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if (ioctl(arp_fd, I_STR, &strioc_if) < 0){ |
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syslog (LOG_ERR, "Can't set ifname to arp\n"); |
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} |
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if((ip_muxid = ioctl(ip_fd, I_LINK, if_fd)) < 0){ |
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syslog(LOG_ERR, "Can't link TAP device to IP"); |
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return -1; |
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} |
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if ((arp_muxid = ioctl (ip_fd, link_type, arp_fd)) < 0) |
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syslog (LOG_ERR, "Can't link TAP device to ARP"); |
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close (if_fd); |
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|
|||
memset(&ifr, 0x0, sizeof(ifr)); |
|||
pstrcpy(ifr.lifr_name, sizeof(ifr.lifr_name), actual_name); |
|||
ifr.lifr_ip_muxid = ip_muxid; |
|||
ifr.lifr_arp_muxid = arp_muxid; |
|||
|
|||
if (ioctl (ip_fd, SIOCSLIFMUXID, &ifr) < 0) |
|||
{ |
|||
ioctl (ip_fd, I_PUNLINK , arp_muxid); |
|||
ioctl (ip_fd, I_PUNLINK, ip_muxid); |
|||
syslog (LOG_ERR, "Can't set multiplexor id"); |
|||
} |
|||
|
|||
snprintf(dev, dev_size, "tap%d", ppa); |
|||
return tap_fd; |
|||
} |
|||
|
|||
static int tap_open(char *ifname, int ifname_size, |
|||
int *vnet_hdr, int vnet_hdr_required) |
|||
{ |
|||
char dev[10]=""; |
|||
int fd; |
|||
if( (fd = tap_alloc(dev, sizeof(dev))) < 0 ){ |
|||
fprintf(stderr, "Cannot allocate TAP device\n"); |
|||
return -1; |
|||
} |
|||
pstrcpy(ifname, ifname_size, dev); |
|||
fcntl(fd, F_SETFL, O_NONBLOCK); |
|||
return fd; |
|||
} |
|||
#elif defined (_AIX) |
|||
static int tap_open(char *ifname, int ifname_size, |
|||
int *vnet_hdr, int vnet_hdr_required) |
|||
{ |
|||
fprintf (stderr, "no tap on AIX\n"); |
|||
return -1; |
|||
} |
|||
#else |
|||
static int tap_open(char *ifname, int ifname_size, |
|||
int *vnet_hdr, int vnet_hdr_required) |
|||
{ |
|||
struct ifreq ifr; |
|||
int fd, ret; |
|||
|
|||
TFR(fd = open("/dev/net/tun", O_RDWR)); |
|||
if (fd < 0) { |
|||
fprintf(stderr, "warning: could not open /dev/net/tun: no virtual network emulation\n"); |
|||
return -1; |
|||
} |
|||
memset(&ifr, 0, sizeof(ifr)); |
|||
ifr.ifr_flags = IFF_TAP | IFF_NO_PI; |
|||
|
|||
if (*vnet_hdr) { |
|||
unsigned int features; |
|||
|
|||
if (ioctl(fd, TUNGETFEATURES, &features) == 0 && |
|||
features & IFF_VNET_HDR) { |
|||
*vnet_hdr = 1; |
|||
ifr.ifr_flags |= IFF_VNET_HDR; |
|||
} |
|||
|
|||
if (vnet_hdr_required && !*vnet_hdr) { |
|||
qemu_error("vnet_hdr=1 requested, but no kernel " |
|||
"support for IFF_VNET_HDR available"); |
|||
close(fd); |
|||
return -1; |
|||
} |
|||
} |
|||
|
|||
if (ifname[0] != '\0') |
|||
pstrcpy(ifr.ifr_name, IFNAMSIZ, ifname); |
|||
else |
|||
pstrcpy(ifr.ifr_name, IFNAMSIZ, "tap%d"); |
|||
ret = ioctl(fd, TUNSETIFF, (void *) &ifr); |
|||
if (ret != 0) { |
|||
fprintf(stderr, "warning: could not configure /dev/net/tun: no virtual network emulation\n"); |
|||
close(fd); |
|||
return -1; |
|||
} |
|||
pstrcpy(ifname, ifname_size, ifr.ifr_name); |
|||
fcntl(fd, F_SETFL, O_NONBLOCK); |
|||
return fd; |
|||
} |
|||
#endif |
|||
|
|||
static int launch_script(const char *setup_script, const char *ifname, int fd) |
|||
{ |
|||
sigset_t oldmask, mask; |
|||
int pid, status; |
|||
char *args[3]; |
|||
char **parg; |
|||
|
|||
sigemptyset(&mask); |
|||
sigaddset(&mask, SIGCHLD); |
|||
sigprocmask(SIG_BLOCK, &mask, &oldmask); |
|||
|
|||
/* try to launch network script */ |
|||
pid = fork(); |
|||
if (pid == 0) { |
|||
int open_max = sysconf(_SC_OPEN_MAX), i; |
|||
|
|||
for (i = 0; i < open_max; i++) { |
|||
if (i != STDIN_FILENO && |
|||
i != STDOUT_FILENO && |
|||
i != STDERR_FILENO && |
|||
i != fd) { |
|||
close(i); |
|||
} |
|||
} |
|||
parg = args; |
|||
*parg++ = (char *)setup_script; |
|||
*parg++ = (char *)ifname; |
|||
*parg++ = NULL; |
|||
execv(setup_script, args); |
|||
_exit(1); |
|||
} else if (pid > 0) { |
|||
while (waitpid(pid, &status, 0) != pid) { |
|||
/* loop */ |
|||
} |
|||
sigprocmask(SIG_SETMASK, &oldmask, NULL); |
|||
|
|||
if (WIFEXITED(status) && WEXITSTATUS(status) == 0) { |
|||
return 0; |
|||
} |
|||
} |
|||
fprintf(stderr, "%s: could not launch network script\n", setup_script); |
|||
return -1; |
|||
} |
|||
|
|||
static int net_tap_init(QemuOpts *opts, int *vnet_hdr) |
|||
{ |
|||
int fd, vnet_hdr_required; |
|||
char ifname[128] = {0,}; |
|||
const char *setup_script; |
|||
|
|||
if (qemu_opt_get(opts, "ifname")) { |
|||
pstrcpy(ifname, sizeof(ifname), qemu_opt_get(opts, "ifname")); |
|||
} |
|||
|
|||
*vnet_hdr = qemu_opt_get_bool(opts, "vnet_hdr", 1); |
|||
if (qemu_opt_get(opts, "vnet_hdr")) { |
|||
vnet_hdr_required = *vnet_hdr; |
|||
} else { |
|||
vnet_hdr_required = 0; |
|||
} |
|||
|
|||
TFR(fd = tap_open(ifname, sizeof(ifname), vnet_hdr, vnet_hdr_required)); |
|||
if (fd < 0) { |
|||
return -1; |
|||
} |
|||
|
|||
setup_script = qemu_opt_get(opts, "script"); |
|||
if (setup_script && |
|||
setup_script[0] != '\0' && |
|||
strcmp(setup_script, "no") != 0 && |
|||
launch_script(setup_script, ifname, fd)) { |
|||
close(fd); |
|||
return -1; |
|||
} |
|||
|
|||
qemu_opt_set(opts, "ifname", ifname); |
|||
|
|||
return fd; |
|||
} |
|||
|
|||
int net_init_tap(QemuOpts *opts, Monitor *mon, const char *name, VLANState *vlan) |
|||
{ |
|||
TAPState *s; |
|||
int fd, vnet_hdr; |
|||
|
|||
if (qemu_opt_get(opts, "fd")) { |
|||
if (qemu_opt_get(opts, "ifname") || |
|||
qemu_opt_get(opts, "script") || |
|||
qemu_opt_get(opts, "downscript") || |
|||
qemu_opt_get(opts, "vnet_hdr")) { |
|||
qemu_error("ifname=, script=, downscript= and vnet_hdr= is invalid with fd=\n"); |
|||
return -1; |
|||
} |
|||
|
|||
fd = net_handle_fd_param(mon, qemu_opt_get(opts, "fd")); |
|||
if (fd == -1) { |
|||
return -1; |
|||
} |
|||
|
|||
fcntl(fd, F_SETFL, O_NONBLOCK); |
|||
|
|||
vnet_hdr = tap_probe_vnet_hdr(fd); |
|||
} else { |
|||
if (!qemu_opt_get(opts, "script")) { |
|||
qemu_opt_set(opts, "script", DEFAULT_NETWORK_SCRIPT); |
|||
} |
|||
|
|||
if (!qemu_opt_get(opts, "downscript")) { |
|||
qemu_opt_set(opts, "downscript", DEFAULT_NETWORK_DOWN_SCRIPT); |
|||
} |
|||
|
|||
fd = net_tap_init(opts, &vnet_hdr); |
|||
} |
|||
|
|||
s = net_tap_fd_init(vlan, "tap", name, fd, vnet_hdr); |
|||
if (!s) { |
|||
close(fd); |
|||
return -1; |
|||
} |
|||
|
|||
if (tap_set_sndbuf(s, opts) < 0) { |
|||
return -1; |
|||
} |
|||
|
|||
if (qemu_opt_get(opts, "fd")) { |
|||
snprintf(s->vc->info_str, sizeof(s->vc->info_str), "fd=%d", fd); |
|||
} else { |
|||
const char *ifname, *script, *downscript; |
|||
|
|||
ifname = qemu_opt_get(opts, "ifname"); |
|||
script = qemu_opt_get(opts, "script"); |
|||
downscript = qemu_opt_get(opts, "downscript"); |
|||
|
|||
snprintf(s->vc->info_str, sizeof(s->vc->info_str), |
|||
"ifname=%s,script=%s,downscript=%s", |
|||
ifname, script, downscript); |
|||
|
|||
if (strcmp(downscript, "no") != 0) { |
|||
snprintf(s->down_script, sizeof(s->down_script), "%s", downscript); |
|||
snprintf(s->down_script_arg, sizeof(s->down_script_arg), "%s", ifname); |
|||
} |
|||
} |
|||
|
|||
if (vlan) { |
|||
vlan->nb_host_devs++; |
|||
} |
|||
|
|||
return 0; |
|||
} |
|||
|
|||
#endif /* !defined(_AIX) */ |
|||
Loading…
Reference in new issue