--- /dev/null
+/*
+ * QEMU System Emulator
+ *
+ * Copyright (c) 2003-2008 Fabrice Bellard
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "tap_int.h"
+#include "qemu-common.h"
+#include "sysemu/sysemu.h"
+#include "qemu/error-report.h"
+
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <net/if_tap.h>
+#endif
+
+#ifndef __FreeBSD__
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ int fd;
+#ifdef TAPGIFNAME
+ struct ifreq ifr;
+#else
+ char *dev;
+ struct stat s;
+#endif
+
+ /* if no ifname is given, always start the search from tap0/tun0. */
+ int i;
+ char dname[100];
+
+ for (i = 0; i < 10; i++) {
+ if (*ifname) {
+ snprintf(dname, sizeof dname, "/dev/%s", ifname);
+ } else {
+#if defined(__OpenBSD__)
+ snprintf(dname, sizeof dname, "/dev/tun%d", i);
+#else
+ snprintf(dname, sizeof dname, "/dev/tap%d", i);
+#endif
+ }
+ TFR(fd = open(dname, O_RDWR));
+ if (fd >= 0) {
+ break;
+ }
+ else if (errno == ENXIO || errno == ENOENT) {
+ break;
+ }
+ if (*ifname) {
+ break;
+ }
+ }
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "could not open %s", dname);
+ return -1;
+ }
+
+#ifdef TAPGIFNAME
+ if (ioctl(fd, TAPGIFNAME, (void *)&ifr) < 0) {
+ error_setg_errno(errp, errno, "could not get tap name");
+ return -1;
+ }
+ pstrcpy(ifname, ifname_size, ifr.ifr_name);
+#else
+ if (fstat(fd, &s) < 0) {
+ error_setg_errno(errp, errno, "could not stat %s", dname);
+ return -1;
+ }
+ dev = devname(s.st_rdev, S_IFCHR);
+ pstrcpy(ifname, ifname_size, dev);
+#endif
+
+ if (*vnet_hdr) {
+ /* BSD doesn't have IFF_VNET_HDR */
+ *vnet_hdr = 0;
+
+ if (vnet_hdr_required && !*vnet_hdr) {
+ error_setg(errp, "vnet_hdr=1 requested, but no kernel "
+ "support for IFF_VNET_HDR available");
+ close(fd);
+ return -1;
+ }
+ }
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ return fd;
+}
+
+#else /* __FreeBSD__ */
+
+#define PATH_NET_TAP "/dev/tap"
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ int fd, s, ret;
+ struct ifreq ifr;
+
+ TFR(fd = open(PATH_NET_TAP, O_RDWR));
+ if (fd < 0) {
+ error_setg_errno(errp, errno, "could not open %s", PATH_NET_TAP);
+ return -1;
+ }
+
+ memset(&ifr, 0, sizeof(ifr));
+
+ ret = ioctl(fd, TAPGIFNAME, (void *)&ifr);
+ if (ret < 0) {
+ error_setg_errno(errp, errno, "could not get tap interface name");
+ goto error;
+ }
+
+ if (ifname[0] != '\0') {
+ /* User requested the interface to have a specific name */
+ s = socket(AF_LOCAL, SOCK_DGRAM, 0);
+ if (s < 0) {
+ error_setg_errno(errp, errno,
+ "could not open socket to set interface name");
+ goto error;
+ }
+ ifr.ifr_data = ifname;
+ ret = ioctl(s, SIOCSIFNAME, (void *)&ifr);
+ close(s);
+ if (ret < 0) {
+ error_setg(errp, "could not set tap interface name");
+ goto error;
+ }
+ } else {
+ pstrcpy(ifname, ifname_size, ifr.ifr_name);
+ }
+
+ if (*vnet_hdr) {
+ /* BSD doesn't have IFF_VNET_HDR */
+ *vnet_hdr = 0;
+
+ if (vnet_hdr_required && !*vnet_hdr) {
+ error_setg(errp, "vnet_hdr=1 requested, but no kernel "
+ "support for IFF_VNET_HDR available");
+ goto error;
+ }
+ }
+ if (mq_required) {
+ error_setg(errp, "mq_required requested, but no kernel support"
+ " for IFF_MULTI_QUEUE available");
+ goto error;
+ }
+
+ fcntl(fd, F_SETFL, O_NONBLOCK);
+ return fd;
+
+error:
+ close(fd);
+ return -1;
+}
+#endif /* __FreeBSD__ */
+
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
+{
+}
+
+int tap_probe_vnet_hdr(int fd)
+{
+ return 0;
+}
+
+int tap_probe_has_ufo(int fd)
+{
+ return 0;
+}
+
+int tap_probe_vnet_hdr_len(int fd, int len)
+{
+ return 0;
+}
+
+void tap_fd_set_vnet_hdr_len(int fd, int len)
+{
+}
+
+int tap_fd_set_vnet_le(int fd, int is_le)
+{
+ return -EINVAL;
+}
+
+int tap_fd_set_vnet_be(int fd, int is_be)
+{
+ return -EINVAL;
+}
+
+void tap_fd_set_offload(int fd, int csum, int tso4,
+ int tso6, int ecn, int ufo)
+{
+}
+
+int tap_fd_enable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_disable(int fd)
+{
+ return -1;
+}
+
+int tap_fd_get_ifname(int fd, char *ifname)
+{
+ return -1;
+}
Code Review / kvmfornfv.git / blobdiff