[libvirt] [PATCH v4 2/3] BSD: implement virNetDevTapCreate() and virNetDevTapDelete()
Implementation uses SIOCIFCREATE2 and SIOCIFDESTROY ioctls.
---
src/util/virnetdevtap.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 116 insertions(+), 2 deletions(-)
diff --git a/src/util/virnetdevtap.c b/src/util/virnetdevtap.c
index bb4b3ba..265676c 100644
--- a/src/util/virnetdevtap.c
+++ b/src/util/virnetdevtap.c
@@ -275,7 +275,121 @@ cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
-#else /* ! TUNSETIFF */
+#elif defined(SIOCIFCREATE2) && defined(SIOCIFDESTROY)
+int virNetDevTapCreate(char **ifname,
+ int *tapfd,
+ int tapfdSize,
+ unsigned int flags ATTRIBUTE_UNUSED)
+{
+ int s;
+ struct ifreq ifr;
+ int ret = -1;
+ char *newifname = NULL;
+
+ if (tapfdSize > 1) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Multiqueue devices are not supported on this
system"));
+ goto cleanup;
+ }
+
+ /* As FreeBSD determines interface type by name,
+ * we have to create 'tap' interface first and
+ * then rename it to 'vnet'
+ */
+ if ((s = virNetDevSetupControl("tap", &ifr)) < 0)
+ return -1;
+
+ if (ioctl(s, SIOCIFCREATE2, &ifr) < 0) {
+ virReportSystemError(errno, "%s",
+ _("Unable to create tap device"));
+ goto cleanup;
+ }
+
+ /* In case we were given exact interface name (e.g. 'vnetN'),
+ * we just rename to it. If we have format string like
+ * 'vnet%d', we need to find the first available name that
+ * matches this pattern
+ */
+ if (strstr(*ifname, "%d") != NULL) {
+ int i;
+ for (i = 0; i <= IF_MAXUNIT; i++) {
+ char *newname;
+ if (virAsprintf(&newname, *ifname, i) < 0) {
+ virReportOOMError();
+ goto cleanup;
+ }
+
+ if (virNetDevExists(newname) == 0) {
+ newifname = newname;
+ break;
+ }
+
+ VIR_FREE(newname);
+ }
+ if (newifname) {
+ VIR_FREE(*ifname);
+ *ifname = newifname;
+ } else {
+ virReportError(VIR_ERR_INTERNAL_ERROR,
+ _("Failed to generate new name for interface %s"),
+ ifr.ifr_name);
+ goto cleanup;
+ }
+ }
+
+ if (tapfd) {
+ char *dev_path = NULL;
+ if (virAsprintf(&dev_path, "/dev/%s", ifr.ifr_name) < 0) {
+ virReportOOMError();
+ goto cleanup;
+ }
+
+ if ((*tapfd = open(dev_path, O_RDWR)) < 0) {
+ virReportSystemError(errno,
+ _("Unable to open %s"),
+ dev_path);
+ VIR_FREE(dev_path);
+ goto cleanup;
+ }
+
+ VIR_FREE(dev_path);
+ }
+
+ if (virNetDevSetName(ifr.ifr_name, *ifname) == -1) {
+ goto cleanup;
+ }
+
+
+ ret = 0;
+cleanup:
+ VIR_FORCE_CLOSE(s);
+
+ return ret;
+}
+
+int virNetDevTapDelete(const char *ifname)
+{
+ int s;
+ struct ifreq ifr;
+ int ret = -1;
+
+ if ((s = virNetDevSetupControl(ifname, &ifr)) < 0)
+ return -1;
+
+ if (ioctl(s, SIOCIFDESTROY, &ifr) < 0) {
+ virReportSystemError(errno,
+ _("Unable to remove tap device %s"),
+ ifname);
+ goto cleanup;
+ }
+
+ ret = 0;
+cleanup:
+ VIR_FORCE_CLOSE(s);
+ return ret;
+}
+
+#else
int virNetDevTapCreate(char **ifname ATTRIBUTE_UNUSED,
int *tapfd ATTRIBUTE_UNUSED,
int tapfdSize ATTRIBUTE_UNUSED,
@@ -291,7 +405,7 @@ int virNetDevTapDelete(const char *ifname ATTRIBUTE_UNUSED)
_("Unable to delete TAP devices on this platform"));
return -1;
}
-#endif /* ! TUNSETIFF */
+#endif
/**
--
1.7.11.5