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f6a2f97eb9
Add utility functions for Open vSwitch to both save per-port data before a live migration, and restore the per-port data after a live migration. Signed-off-by: Kyle Mestery <kmestery@cisco.com>
247 lines
7.8 KiB
C
247 lines
7.8 KiB
C
/*
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* Copyright (C) 2012 Nicira, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Authors:
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* Dan Wendlandt <dan@nicira.com>
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* Kyle Mestery <kmestery@cisco.com>
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* Ansis Atteka <aatteka@nicira.com>
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*/
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#include <config.h>
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#include "virnetdevopenvswitch.h"
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#include "command.h"
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#include "memory.h"
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#include "virterror_internal.h"
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#include "virmacaddr.h"
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#define VIR_FROM_THIS VIR_FROM_NONE
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/**
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* virNetDevOpenvswitchAddPort:
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* @brname: the bridge name
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* @ifname: the network interface name
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* @macaddr: the mac address of the virtual interface
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* @vmuuid: the Domain UUID that has this interface
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* @ovsport: the ovs specific fields
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*
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* Add an interface to the OVS bridge
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*
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* Returns 0 in case of success or -1 in case of failure.
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*/
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int virNetDevOpenvswitchAddPort(const char *brname, const char *ifname,
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const virMacAddrPtr macaddr,
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const unsigned char *vmuuid,
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virNetDevVPortProfilePtr ovsport,
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virNetDevVlanPtr virtVlan)
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{
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int ret = -1;
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int i = 0;
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virCommandPtr cmd = NULL;
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char macaddrstr[VIR_MAC_STRING_BUFLEN];
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char ifuuidstr[VIR_UUID_STRING_BUFLEN];
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char vmuuidstr[VIR_UUID_STRING_BUFLEN];
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char *attachedmac_ex_id = NULL;
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char *ifaceid_ex_id = NULL;
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char *profile_ex_id = NULL;
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char *vmid_ex_id = NULL;
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virBuffer buf = VIR_BUFFER_INITIALIZER;
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virMacAddrFormat(macaddr, macaddrstr);
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virUUIDFormat(ovsport->interfaceID, ifuuidstr);
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virUUIDFormat(vmuuid, vmuuidstr);
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if (virAsprintf(&attachedmac_ex_id, "external-ids:attached-mac=\"%s\"",
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macaddrstr) < 0)
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goto out_of_memory;
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if (virAsprintf(&ifaceid_ex_id, "external-ids:iface-id=\"%s\"",
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ifuuidstr) < 0)
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goto out_of_memory;
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if (virAsprintf(&vmid_ex_id, "external-ids:vm-id=\"%s\"",
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vmuuidstr) < 0)
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goto out_of_memory;
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if (ovsport->profileID[0] != '\0') {
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if (virAsprintf(&profile_ex_id, "external-ids:port-profile=\"%s\"",
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ovsport->profileID) < 0)
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goto out_of_memory;
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}
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if (virtVlan && virtVlan->nTags > 0) {
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/* Trunk port first */
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if (virtVlan->trunk) {
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virBufferAddLit(&buf, "trunk=");
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/*
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* Trunk ports have at least one VLAN. Do the first one
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* outside the "for" loop so we can put a "," at the
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* start of the for loop if there are more than one VLANs
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* on this trunk port.
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*/
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virBufferAsprintf(&buf, "%d", virtVlan->tag[i]);
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for (i = 1; i < virtVlan->nTags; i++) {
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virBufferAddLit(&buf, ",");
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virBufferAsprintf(&buf, "%d", virtVlan->tag[i]);
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}
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} else if (virtVlan->nTags) {
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virBufferAsprintf(&buf, "tag=%d", virtVlan->tag[0]);
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}
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}
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cmd = virCommandNew(OVSVSCTL);
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virCommandAddArgList(cmd, "--timeout=5", "--", "--may-exist", "add-port",
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brname, ifname, NULL);
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if (virBufferUse(&buf) != 0)
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virCommandAddArgList(cmd, virBufferCurrentContent(&buf), NULL);
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if (ovsport->profileID[0] == '\0') {
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virCommandAddArgList(cmd,
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"--", "set", "Interface", ifname, attachedmac_ex_id,
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"--", "set", "Interface", ifname, ifaceid_ex_id,
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"--", "set", "Interface", ifname, vmid_ex_id,
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"--", "set", "Interface", ifname,
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"external-ids:iface-status=active",
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NULL);
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} else {
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virCommandAddArgList(cmd,
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"--", "set", "Interface", ifname, attachedmac_ex_id,
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"--", "set", "Interface", ifname, ifaceid_ex_id,
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"--", "set", "Interface", ifname, vmid_ex_id,
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"--", "set", "Interface", ifname, profile_ex_id,
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"--", "set", "Interface", ifname,
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"external-ids:iface-status=active",
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NULL);
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}
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if (virCommandRun(cmd, NULL) < 0) {
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virReportSystemError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to add port %s to OVS bridge %s"),
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ifname, brname);
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goto cleanup;
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}
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ret = 0;
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cleanup:
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virBufferFreeAndReset(&buf);
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VIR_FREE(attachedmac_ex_id);
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VIR_FREE(ifaceid_ex_id);
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VIR_FREE(vmid_ex_id);
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VIR_FREE(profile_ex_id);
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virCommandFree(cmd);
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return ret;
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out_of_memory:
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virReportOOMError();
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goto cleanup;
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}
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/**
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* virNetDevOpenvswitchRemovePort:
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* @ifname: the network interface name
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*
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* Deletes an interface from a OVS bridge
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*
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* Returns 0 in case of success or -1 in case of failure.
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*/
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int virNetDevOpenvswitchRemovePort(const char *brname ATTRIBUTE_UNUSED, const char *ifname)
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{
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int ret = -1;
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virCommandPtr cmd = NULL;
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cmd = virCommandNew(OVSVSCTL);
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virCommandAddArgList(cmd, "--timeout=5", "--", "--if-exists", "del-port", ifname, NULL);
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if (virCommandRun(cmd, NULL) < 0) {
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virReportSystemError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to delete port %s from OVS"), ifname);
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goto cleanup;
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}
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ret = 0;
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cleanup:
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virCommandFree(cmd);
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return ret;
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}
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/**
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* virNetDevOpenvswitchGetMigrateData:
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* @migrate: a pointer to store the data into, allocated by this function
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* @ifname: name of the interface for which data is being migrated
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*
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* Allocates data to be migrated specific to Open vSwitch
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*
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* Returns 0 in case of success or -1 in case of failure
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*/
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int virNetDevOpenvswitchGetMigrateData(char **migrate, const char *ifname)
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{
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virCommandPtr cmd = NULL;
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int ret = -1;
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cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "get", "Interface",
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ifname, "external_ids:PortData", NULL);
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virCommandSetOutputBuffer(cmd, migrate);
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/* Run the command */
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if (virCommandRun(cmd, NULL) < 0) {
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virReportSystemError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to run command to get OVS port data for "
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"interface %s"), ifname);
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goto cleanup;
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}
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/* Wipeout the newline */
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(*migrate)[strlen(*migrate) - 1] = '\0';
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ret = 0;
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cleanup:
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return ret;
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}
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/**
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* virNetDevOpenvswitchSetMigrateData:
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* @migrate: the data which was transferred during migration
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* @ifname: the name of the interface the data is associated with
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*
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* Repopulates OVS per-port data on destination host
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*
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* Returns 0 in case of success or -1 in case of failure
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*/
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int virNetDevOpenvswitchSetMigrateData(char *migrate, const char *ifname)
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{
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virCommandPtr cmd = NULL;
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int ret = -1;
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cmd = virCommandNewArgList(OVSVSCTL, "--timeout=5", "set",
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"Interface", ifname, NULL);
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virCommandAddArgFormat(cmd, "external_ids:PortData=%s", migrate);
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/* Run the command */
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if (virCommandRun(cmd, NULL) < 0) {
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virReportSystemError(VIR_ERR_INTERNAL_ERROR,
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_("Unable to run command to set OVS port data for "
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"interface %s"), ifname);
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goto cleanup;
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}
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ret = 0;
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cleanup:
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return ret;
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}
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