libvirt/src/util/virnetdevopenvswitch.c

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/*
* Copyright (C) 2012 Nicira, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Authors:
* Dan Wendlandt <dan@nicira.com>
* Kyle Mestery <kmestery@cisco.com>
* Ansis Atteka <aatteka@nicira.com>
*/
#include <config.h>
#include "virnetdevopenvswitch.h"
#include "command.h"
#include "memory.h"
#include "virterror_internal.h"
#include "virmacaddr.h"
#define VIR_FROM_THIS VIR_FROM_NONE
/**
* virNetDevOpenvswitchAddPort:
* @brname: the bridge name
* @ifname: the network interface name
* @macaddr: the mac address of the virtual interface
* @vmuuid: the Domain UUID that has this interface
* @ovsport: the ovs specific fields
*
* Add an interface to the OVS bridge
*
* Returns 0 in case of success or -1 in case of failure.
*/
int virNetDevOpenvswitchAddPort(const char *brname, const char *ifname,
const virMacAddrPtr macaddr,
const unsigned char *vmuuid,
virNetDevVPortProfilePtr ovsport,
virNetDevVlanPtr virtVlan)
{
int ret = -1;
int i = 0;
virCommandPtr cmd = NULL;
char macaddrstr[VIR_MAC_STRING_BUFLEN];
char ifuuidstr[VIR_UUID_STRING_BUFLEN];
char vmuuidstr[VIR_UUID_STRING_BUFLEN];
char *attachedmac_ex_id = NULL;
char *ifaceid_ex_id = NULL;
char *profile_ex_id = NULL;
char *vmid_ex_id = NULL;
virBuffer buf = VIR_BUFFER_INITIALIZER;
virMacAddrFormat(macaddr, macaddrstr);
virUUIDFormat(ovsport->interfaceID, ifuuidstr);
virUUIDFormat(vmuuid, vmuuidstr);
if (virAsprintf(&attachedmac_ex_id, "external-ids:attached-mac=\"%s\"",
macaddrstr) < 0)
goto out_of_memory;
if (virAsprintf(&ifaceid_ex_id, "external-ids:iface-id=\"%s\"",
ifuuidstr) < 0)
goto out_of_memory;
if (virAsprintf(&vmid_ex_id, "external-ids:vm-id=\"%s\"",
vmuuidstr) < 0)
goto out_of_memory;
if (ovsport->profileID[0] != '\0') {
if (virAsprintf(&profile_ex_id, "external-ids:port-profile=\"%s\"",
ovsport->profileID) < 0)
goto out_of_memory;
}
if (virtVlan && virtVlan->nTags > 0) {
/* Trunk port first */
if (virtVlan->trunk) {
virBufferAddLit(&buf, "trunk=");
/*
* Trunk ports have at least one VLAN. Do the first one
* outside the "for" loop so we can put a "," at the
* start of the for loop if there are more than one VLANs
* on this trunk port.
*/
virBufferAsprintf(&buf, "%d", virtVlan->tag[i]);
for (i = 1; i < virtVlan->nTags; i++) {
virBufferAddLit(&buf, ",");
virBufferAsprintf(&buf, "%d", virtVlan->tag[i]);
}
} else if (virtVlan->nTags) {
virBufferAsprintf(&buf, "tag=%d", virtVlan->tag[0]);
}
}
cmd = virCommandNew(OVSVSCTL);
virCommandAddArgList(cmd, "--timeout=5", "--", "--may-exist", "add-port",
brname, ifname, NULL);
if (virBufferUse(&buf) != 0)
virCommandAddArgList(cmd, virBufferCurrentContent(&buf), NULL);
if (ovsport->profileID[0] == '\0') {
virCommandAddArgList(cmd,
"--", "set", "Interface", ifname, attachedmac_ex_id,
"--", "set", "Interface", ifname, ifaceid_ex_id,
"--", "set", "Interface", ifname, vmid_ex_id,
"--", "set", "Interface", ifname,
"external-ids:iface-status=active",
NULL);
} else {
virCommandAddArgList(cmd,
"--", "set", "Interface", ifname, attachedmac_ex_id,
"--", "set", "Interface", ifname, ifaceid_ex_id,
"--", "set", "Interface", ifname, vmid_ex_id,
"--", "set", "Interface", ifname, profile_ex_id,
"--", "set", "Interface", ifname,
"external-ids:iface-status=active",
NULL);
}
if (virCommandRun(cmd, NULL) < 0) {
virReportSystemError(VIR_ERR_INTERNAL_ERROR,
_("Unable to add port %s to OVS bridge %s"),
ifname, brname);
goto cleanup;
}
ret = 0;
cleanup:
virBufferFreeAndReset(&buf);
VIR_FREE(attachedmac_ex_id);
VIR_FREE(ifaceid_ex_id);
VIR_FREE(vmid_ex_id);
VIR_FREE(profile_ex_id);
virCommandFree(cmd);
return ret;
out_of_memory:
virReportOOMError();
goto cleanup;
}
/**
* virNetDevOpenvswitchRemovePort:
* @ifname: the network interface name
*
* Deletes an interface from a OVS bridge
*
* Returns 0 in case of success or -1 in case of failure.
*/
int virNetDevOpenvswitchRemovePort(const char *brname ATTRIBUTE_UNUSED, const char *ifname)
{
int ret = -1;
virCommandPtr cmd = NULL;
cmd = virCommandNew(OVSVSCTL);
virCommandAddArgList(cmd, "--timeout=5", "--", "--if-exists", "del-port", ifname, NULL);
if (virCommandRun(cmd, NULL) < 0) {
virReportSystemError(VIR_ERR_INTERNAL_ERROR,
_("Unable to delete port %s from OVS"), ifname);
goto cleanup;
}
ret = 0;
cleanup:
virCommandFree(cmd);
return ret;
}
/**
* virNetDevOpenvswitchGetMigrateData:
* @migrate: a pointer to store the data into, allocated by this function
* @ifname: name of the interface for which data is being migrated
*
* Allocates data to be migrated specific to Open vSwitch
*
* Returns 0 in case of success or -1 in case of failure
*/
int virNetDevOpenvswitchGetMigrateData(char **migrate, const char *ifname)
{
virCommandPtr cmd = NULL;
int ret = -1;
cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "get", "Interface",
ifname, "external_ids:PortData", NULL);
virCommandSetOutputBuffer(cmd, migrate);
/* Run the command */
if (virCommandRun(cmd, NULL) < 0) {
virReportSystemError(VIR_ERR_INTERNAL_ERROR,
_("Unable to run command to get OVS port data for "
"interface %s"), ifname);
goto cleanup;
}
/* Wipeout the newline */
(*migrate)[strlen(*migrate) - 1] = '\0';
ret = 0;
cleanup:
return ret;
}
/**
* virNetDevOpenvswitchSetMigrateData:
* @migrate: the data which was transferred during migration
* @ifname: the name of the interface the data is associated with
*
* Repopulates OVS per-port data on destination host
*
* Returns 0 in case of success or -1 in case of failure
*/
int virNetDevOpenvswitchSetMigrateData(char *migrate, const char *ifname)
{
virCommandPtr cmd = NULL;
int ret = -1;
cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "set",
"Interface", ifname, NULL);
virCommandAddArgFormat(cmd, "external_ids:PortData=%s", migrate);
/* Run the command */
if (virCommandRun(cmd, NULL) < 0) {
virReportSystemError(VIR_ERR_INTERNAL_ERROR,
_("Unable to run command to set OVS port data for "
"interface %s"), ifname);
goto cleanup;
}
ret = 0;
cleanup:
return ret;
}