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BSD: implement virNetDevTapCreate() and virNetDevTapDelete()

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Implementation uses SIOCIFCREATE2 and SIOCIFDESTROY ioctls.
This commit is contained in:
Roman Bogorodskiy 2013-06-13 10:26:21 +04:00 committed by Michal Privoznik
parent 9614d70b0c
commit 847e1cd1f8
1 changed files with 116 additions and 2 deletions
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118
src/util/virnetdevtap.c
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@ -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
/**