* THE SOFTWARE.
*/
-#include "net/tap.h"
-#incude "qemu-common.h"
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "tap_int.h"
+#include "qemu/cutils.h"
+#include "sysemu/sysemu.h"
+#include "qemu/error-report.h"
-#ifdef __NetBSD__
+#if defined(__NetBSD__) || defined(__FreeBSD__)
+#include <sys/ioctl.h>
+#include <net/if.h>
#include <net/if_tap.h>
#endif
-#if defined(__FreeBSD__) || defined(__DragonFly__)
-#include <libutil.h>
+#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
-#include <util.h>
+ char *dev;
+ struct stat s;
#endif
-#elif defined (__GLIBC__) && defined (__FreeBSD_kernel__)
-#include <freebsd/stdlib.h>
+ /* 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__)
-#include <util.h>
+ 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;
+ }
-int tap_open(char *ifname, int ifname_size, int *vnet_hdr, int vnet_hdr_required)
+#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"
+
+static int tap_open_clone(char *ifname, int ifname_size, Error **errp)
{
- int fd;
- char *dev;
- struct stat s;
+ int fd, s, ret;
+ struct ifreq ifr;
- TFR(fd = open("/dev/tap", O_RDWR));
+ TFR(fd = open(PATH_NET_TAP, O_RDWR));
if (fd < 0) {
- fprintf(stderr, "warning: could not open /dev/tap: no virtual network emulation\n");
+ error_setg_errno(errp, errno, "could not open %s", PATH_NET_TAP);
return -1;
}
- fstat(fd, &s);
- dev = devname(s.st_rdev, S_IFCHR);
- pstrcpy(ifname, ifname_size, dev);
+ 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");
+ close(fd);
+ return -1;
+ }
+
+ 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");
+ close(fd);
+ return -1;
+ }
+ ifr.ifr_data = ifname;
+ ret = ioctl(s, SIOCSIFNAME, (void *)&ifr);
+ close(s);
+ if (ret < 0) {
+ error_setg(errp, "could not set tap interface name");
+ close(fd);
+ return -1;
+ }
+ } else {
+ pstrcpy(ifname, ifname_size, ifr.ifr_name);
+ }
+
+ return fd;
+}
+
+int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
+ int vnet_hdr_required, int mq_required, Error **errp)
+{
+ int fd = -1;
+
+ /* If the specified tap device already exists just use it. */
+ if (ifname[0] != '\0') {
+ char dname[100];
+ snprintf(dname, sizeof dname, "/dev/%s", ifname);
+ TFR(fd = open(dname, O_RDWR));
+ if (fd < 0 && errno != ENOENT) {
+ error_setg_errno(errp, errno, "could not open %s", dname);
+ return -1;
+ }
+ }
+
+ if (fd < 0) {
+ /* Tap device not specified or does not exist. */
+ if ((fd = tap_open_clone(ifname, ifname_size, errp)) < 0) {
+ return -1;
+ }
+ }
+
+ 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__ */
-int tap_set_sndbuf(int fd, QemuOpts *opts)
+void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
{
- return 0;
}
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;
+}
projects / qemu.git / blobdiff