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libvirt/src/conf/interface_conf.c
Daniel P. Berrange 8feae8e136 Don't clobber return value in virInterfaceDefParseProtoIPv6 
Several places in virInterfaceDefParseProtoIPv6 clobber the
default 'ret' return value. So when jumping to cleanup on
error, 'ret' may mistakenly be set to 0 instead of -1. This
caused failure to report OOM errors, meaning data was silently
lost during parsing.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-09-25 18:12:08 +01:00

1305 lines
39 KiB
C
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/*
* interface_conf.c: interfaces XML handling
*
* Copyright (C) 2006-2010, 2013 Red Hat, 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/>.
*
* Author: Daniel Veillard <veillard@redhat.com>
* Laine Stump <laine@redhat.com>
*/
#include <config.h>
#include "virerror.h"
#include "datatypes.h"
#include "interface_conf.h"
#include "viralloc.h"
#include "virxml.h"
#include "viruuid.h"
#include "virbuffer.h"
#define VIR_FROM_THIS VIR_FROM_INTERFACE
VIR_ENUM_IMPL(virInterface,
VIR_INTERFACE_TYPE_LAST,
"ethernet", "bridge", "bond", "vlan")
static virInterfaceDefPtr
virInterfaceDefParseXML(xmlXPathContextPtr ctxt, int parentIfType);
static int
virInterfaceDefDevFormat(virBufferPtr buf,
const virInterfaceDefPtr def, int level);
static
void virInterfaceIpDefFree(virInterfaceIpDefPtr def) {
if (def == NULL)
return;
VIR_FREE(def->address);
VIR_FREE(def);
}
static
void virInterfaceProtocolDefFree(virInterfaceProtocolDefPtr def) {
size_t i;
if (def == NULL)
return;
for (i = 0; i < def->nips; i++) {
virInterfaceIpDefFree(def->ips[i]);
}
VIR_FREE(def->ips);
VIR_FREE(def->family);
VIR_FREE(def->gateway);
VIR_FREE(def);
}
void virInterfaceDefFree(virInterfaceDefPtr def)
{
size_t i;
int pp;
if (def == NULL)
return;
VIR_FREE(def->name);
VIR_FREE(def->mac);
switch (def->type) {
case VIR_INTERFACE_TYPE_BRIDGE:
VIR_FREE(def->data.bridge.delay);
for (i = 0; i < def->data.bridge.nbItf; i++) {
if (def->data.bridge.itf[i] == NULL)
break; /* to cope with half parsed data on errors */
virInterfaceDefFree(def->data.bridge.itf[i]);
}
VIR_FREE(def->data.bridge.itf);
break;
case VIR_INTERFACE_TYPE_BOND:
VIR_FREE(def->data.bond.target);
for (i = 0; i < def->data.bond.nbItf; i++) {
if (def->data.bond.itf[i] == NULL)
break; /* to cope with half parsed data on errors */
virInterfaceDefFree(def->data.bond.itf[i]);
}
VIR_FREE(def->data.bond.itf);
break;
case VIR_INTERFACE_TYPE_VLAN:
VIR_FREE(def->data.vlan.tag);
VIR_FREE(def->data.vlan.devname);
break;
}
/* free all protos */
for (pp = 0; pp < def->nprotos; pp++) {
virInterfaceProtocolDefFree(def->protos[pp]);
}
VIR_FREE(def->protos);
VIR_FREE(def);
}
static int
virInterfaceDefParseName(virInterfaceDefPtr def,
xmlXPathContextPtr ctxt) {
char *tmp;
tmp = virXPathString("string(./@name)", ctxt);
if (tmp == NULL) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("interface has no name"));
return -1;
}
def->name = tmp;
return 0;
}
static int
virInterfaceDefParseMtu(virInterfaceDefPtr def,
xmlXPathContextPtr ctxt) {
unsigned long mtu;
int ret;
ret = virXPathULong("string(./mtu/@size)", ctxt, &mtu);
if ((ret == -2) || ((ret == 0) && (mtu > 100000))) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("interface mtu value is improper"));
return -1;
} else if (ret == 0) {
def->mtu = (unsigned int) mtu;
}
return 0;
}
static int
virInterfaceDefParseStartMode(virInterfaceDefPtr def,
xmlXPathContextPtr ctxt) {
char *tmp;
tmp = virXPathString("string(./start/@mode)", ctxt);
if (tmp == NULL)
def->startmode = VIR_INTERFACE_START_UNSPECIFIED;
else if (STREQ(tmp, "onboot"))
def->startmode = VIR_INTERFACE_START_ONBOOT;
else if (STREQ(tmp, "hotplug"))
def->startmode = VIR_INTERFACE_START_HOTPLUG;
else if (STREQ(tmp, "none"))
def->startmode = VIR_INTERFACE_START_NONE;
else {
virReportError(VIR_ERR_XML_ERROR,
_("unknown interface startmode %s"), tmp);
VIR_FREE(tmp);
return -1;
}
VIR_FREE(tmp);
return 0;
}
static int
virInterfaceDefParseBondMode(xmlXPathContextPtr ctxt) {
char *tmp;
int ret = 0;
tmp = virXPathString("string(./@mode)", ctxt);
if (tmp == NULL)
return VIR_INTERFACE_BOND_NONE;
if (STREQ(tmp, "balance-rr"))
ret = VIR_INTERFACE_BOND_BALRR;
else if (STREQ(tmp, "active-backup"))
ret = VIR_INTERFACE_BOND_ABACKUP;
else if (STREQ(tmp, "balance-xor"))
ret = VIR_INTERFACE_BOND_BALXOR;
else if (STREQ(tmp, "broadcast"))
ret = VIR_INTERFACE_BOND_BCAST;
else if (STREQ(tmp, "802.3ad"))
ret = VIR_INTERFACE_BOND_8023AD;
else if (STREQ(tmp, "balance-tlb"))
ret = VIR_INTERFACE_BOND_BALTLB;
else if (STREQ(tmp, "balance-alb"))
ret = VIR_INTERFACE_BOND_BALALB;
else {
virReportError(VIR_ERR_XML_ERROR,
_("unknown bonding mode %s"), tmp);
ret = -1;
}
VIR_FREE(tmp);
return ret;
}
static int
virInterfaceDefParseBondMiiCarrier(xmlXPathContextPtr ctxt) {
char *tmp;
int ret = 0;
tmp = virXPathString("string(./miimon/@carrier)", ctxt);
if (tmp == NULL)
return VIR_INTERFACE_BOND_MII_NONE;
if (STREQ(tmp, "ioctl"))
ret = VIR_INTERFACE_BOND_MII_IOCTL;
else if (STREQ(tmp, "netif"))
ret = VIR_INTERFACE_BOND_MII_NETIF;
else {
virReportError(VIR_ERR_XML_ERROR,
_("unknown mii bonding carrier %s"), tmp);
ret = -1;
}
VIR_FREE(tmp);
return ret;
}
static int
virInterfaceDefParseBondArpValid(xmlXPathContextPtr ctxt) {
char *tmp;
int ret = 0;
tmp = virXPathString("string(./arpmon/@validate)", ctxt);
if (tmp == NULL)
return VIR_INTERFACE_BOND_ARP_NONE;
if (STREQ(tmp, "active"))
ret = VIR_INTERFACE_BOND_ARP_ACTIVE;
else if (STREQ(tmp, "backup"))
ret = VIR_INTERFACE_BOND_ARP_BACKUP;
else if (STREQ(tmp, "all"))
ret = VIR_INTERFACE_BOND_ARP_ALL;
else {
virReportError(VIR_ERR_XML_ERROR,
_("unknown arp bonding validate %s"), tmp);
ret = -1;
}
VIR_FREE(tmp);
return ret;
}
static int
virInterfaceDefParseDhcp(virInterfaceProtocolDefPtr def,
xmlNodePtr dhcp, xmlXPathContextPtr ctxt) {
xmlNodePtr save;
char *tmp;
int ret = 0;
def->dhcp = 1;
save = ctxt->node;
ctxt->node = dhcp;
/* Not much to do in the current version */
tmp = virXPathString("string(./@peerdns)", ctxt);
if (tmp) {
if (STREQ(tmp, "yes"))
def->peerdns = 1;
else if (STREQ(tmp, "no"))
def->peerdns = 0;
else {
virReportError(VIR_ERR_XML_ERROR,
_("unknown dhcp peerdns value %s"), tmp);
ret = -1;
}
VIR_FREE(tmp);
} else
def->peerdns = -1;
ctxt->node = save;
return ret;
}
static int
virInterfaceDefParseIp(virInterfaceIpDefPtr def,
xmlXPathContextPtr ctxt) {
int ret = 0;
char *tmp;
long l;
tmp = virXPathString("string(./@address)", ctxt);
def->address = tmp;
if (tmp != NULL) {
ret = virXPathLong("string(./@prefix)", ctxt, &l);
if (ret == 0)
def->prefix = (int) l;
else if (ret == -2) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("Invalid ip address prefix value"));
return -1;
}
}
return 0;
}
static int
virInterfaceDefParseProtoIPv4(virInterfaceProtocolDefPtr def,
xmlXPathContextPtr ctxt) {
xmlNodePtr dhcp;
xmlNodePtr *ipNodes = NULL;
int nIpNodes, ret = -1;
size_t i;
char *tmp;
tmp = virXPathString("string(./route[1]/@gateway)", ctxt);
def->gateway = tmp;
dhcp = virXPathNode("./dhcp", ctxt);
if (dhcp != NULL) {
if (virInterfaceDefParseDhcp(def, dhcp, ctxt) < 0)
return -1;
}
nIpNodes = virXPathNodeSet("./ip", ctxt, &ipNodes);
if (nIpNodes < 0)
return -1;
if (ipNodes == NULL)
return 0;
if (VIR_ALLOC_N(def->ips, nIpNodes) < 0)
goto error;
def->nips = 0;
for (i = 0; i < nIpNodes; i++) {
virInterfaceIpDefPtr ip;
if (VIR_ALLOC(ip) < 0)
goto error;
ctxt->node = ipNodes[i];
if (virInterfaceDefParseIp(ip, ctxt) < 0) {
virInterfaceIpDefFree(ip);
goto error;
}
def->ips[def->nips++] = ip;
}
ret = 0;
error:
VIR_FREE(ipNodes);
return ret;
}
static int
virInterfaceDefParseProtoIPv6(virInterfaceProtocolDefPtr def,
xmlXPathContextPtr ctxt) {
xmlNodePtr dhcp, autoconf;
xmlNodePtr *ipNodes = NULL;
int nIpNodes, ret = -1;
size_t i;
char *tmp;
tmp = virXPathString("string(./route[1]/@gateway)", ctxt);
def->gateway = tmp;
autoconf = virXPathNode("./autoconf", ctxt);
if (autoconf != NULL)
def->autoconf = 1;
dhcp = virXPathNode("./dhcp", ctxt);
if (dhcp != NULL) {
if (virInterfaceDefParseDhcp(def, dhcp, ctxt) < 0)
return -1;
}
nIpNodes = virXPathNodeSet("./ip", ctxt, &ipNodes);
if (nIpNodes < 0)
return -1;
if (ipNodes == NULL)
return 0;
if (VIR_ALLOC_N(def->ips, nIpNodes) < 0)
goto error;
def->nips = 0;
for (i = 0; i < nIpNodes; i++) {
virInterfaceIpDefPtr ip;
if (VIR_ALLOC(ip) < 0)
goto error;
ctxt->node = ipNodes[i];
if (virInterfaceDefParseIp(ip, ctxt) < 0) {
virInterfaceIpDefFree(ip);
goto error;
}
def->ips[def->nips++] = ip;
}
ret = 0;
error:
VIR_FREE(ipNodes);
return ret;
}
static int
virInterfaceDefParseIfAdressing(virInterfaceDefPtr def,
xmlXPathContextPtr ctxt) {
xmlNodePtr save;
xmlNodePtr *protoNodes = NULL;
int nProtoNodes, pp, ret = -1;
char *tmp;
save = ctxt->node;
nProtoNodes = virXPathNodeSet("./protocol", ctxt, &protoNodes);
if (nProtoNodes < 0)
goto error;
if (nProtoNodes == 0) {
/* no protocols is an acceptable outcome */
return 0;
}
if (VIR_ALLOC_N(def->protos, nProtoNodes) < 0)
goto error;
def->nprotos = 0;
for (pp = 0; pp < nProtoNodes; pp++) {
virInterfaceProtocolDefPtr proto;
if (VIR_ALLOC(proto) < 0)
goto error;
ctxt->node = protoNodes[pp];
tmp = virXPathString("string(./@family)", ctxt);
if (tmp == NULL) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("protocol misses the family attribute"));
virInterfaceProtocolDefFree(proto);
goto error;
}
proto->family = tmp;
if (STREQ(tmp, "ipv4")) {
ret = virInterfaceDefParseProtoIPv4(proto, ctxt);
if (ret != 0) {
virInterfaceProtocolDefFree(proto);
goto error;
}
} else if (STREQ(tmp, "ipv6")) {
ret = virInterfaceDefParseProtoIPv6(proto, ctxt);
if (ret != 0) {
virInterfaceProtocolDefFree(proto);
goto error;
}
} else {
virReportError(VIR_ERR_XML_ERROR,
_("unsupported protocol family '%s'"), tmp);
virInterfaceProtocolDefFree(proto);
goto error;
}
def->protos[def->nprotos++] = proto;
}
ret = 0;
error:
VIR_FREE(protoNodes);
ctxt->node = save;
return ret;
}
static int
virInterfaceDefParseBridge(virInterfaceDefPtr def,
xmlXPathContextPtr ctxt) {
xmlNodePtr *interfaces = NULL;
xmlNodePtr bridge;
virInterfaceDefPtr itf;
int nbItf;
size_t i;
int ret = 0;
bridge = ctxt->node;
nbItf = virXPathNodeSet("./interface", ctxt, &interfaces);
if (nbItf < 0) {
ret = -1;
goto error;
}
if (nbItf > 0) {
if (VIR_ALLOC_N(def->data.bridge.itf, nbItf) < 0) {
ret = -1;
goto error;
}
def->data.bridge.nbItf = nbItf;
for (i = 0; i < nbItf; i++) {
ctxt->node = interfaces[i];
itf = virInterfaceDefParseXML(ctxt, VIR_INTERFACE_TYPE_BRIDGE);
if (itf == NULL) {
ret = -1;
def->data.bridge.nbItf = i;
goto error;
}
def->data.bridge.itf[i] = itf;
}
}
error:
VIR_FREE(interfaces);
ctxt->node = bridge;
return ret;
}
static int
virInterfaceDefParseBondItfs(virInterfaceDefPtr def,
xmlXPathContextPtr ctxt) {
xmlNodePtr *interfaces = NULL;
xmlNodePtr bond = ctxt->node;
virInterfaceDefPtr itf;
int nbItf;
size_t i;
int ret = 0;
nbItf = virXPathNodeSet("./interface", ctxt, &interfaces);
if (nbItf < 0) {
ret = -1;
goto error;
}
if (nbItf == 0) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("bond has no interfaces"));
ret = -1;
goto error;
}
if (VIR_ALLOC_N(def->data.bond.itf, nbItf) < 0) {
ret = -1;
goto error;
}
def->data.bond.nbItf = nbItf;
for (i = 0; i < nbItf; i++) {
ctxt->node = interfaces[i];
itf = virInterfaceDefParseXML(ctxt, VIR_INTERFACE_TYPE_BOND);
if (itf == NULL) {
ret = -1;
def->data.bond.nbItf = i;
goto error;
}
def->data.bond.itf[i] = itf;
}
error:
VIR_FREE(interfaces);
ctxt->node = bond;
return ret;
}
static int
virInterfaceDefParseBond(virInterfaceDefPtr def,
xmlXPathContextPtr ctxt) {
int res;
def->data.bond.mode = virInterfaceDefParseBondMode(ctxt);
if (def->data.bond.mode < 0)
return -1;
if (virInterfaceDefParseBondItfs(def, ctxt) != 0)
return -1;
if (virXPathNode("./miimon[1]", ctxt) != NULL) {
def->data.bond.monit = VIR_INTERFACE_BOND_MONIT_MII;
res = virXPathInt("string(./miimon/@freq)", ctxt,
&def->data.bond.frequency);
if ((res == -2) || (res == -1)) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("bond interface miimon freq missing or invalid"));
return -1;
}
res = virXPathInt("string(./miimon/@downdelay)", ctxt,
&def->data.bond.downdelay);
if (res == -2) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("bond interface miimon downdelay invalid"));
return -1;
}
res = virXPathInt("string(./miimon/@updelay)", ctxt,
&def->data.bond.updelay);
if (res == -2) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("bond interface miimon updelay invalid"));
return -1;
}
def->data.bond.carrier = virInterfaceDefParseBondMiiCarrier(ctxt);
if (def->data.bond.carrier < 0)
return -1;
} else if (virXPathNode("./arpmon[1]", ctxt) != NULL) {
def->data.bond.monit = VIR_INTERFACE_BOND_MONIT_ARP;
res = virXPathInt("string(./arpmon/@interval)", ctxt,
&def->data.bond.interval);
if ((res == -2) || (res == -1)) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("bond interface arpmon interval missing or invalid"));
return -1;
}
def->data.bond.target =
virXPathString("string(./arpmon/@target)", ctxt);
if (def->data.bond.target == NULL) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("bond interface arpmon target missing"));
return -1;
}
def->data.bond.validate = virInterfaceDefParseBondArpValid(ctxt);
if (def->data.bond.validate < 0)
return -1;
}
return 0;
}
static int
virInterfaceDefParseVlan(virInterfaceDefPtr def,
xmlXPathContextPtr ctxt) {
def->data.vlan.tag = virXPathString("string(./@tag)", ctxt);
if (def->data.vlan.tag == NULL) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("vlan interface misses the tag attribute"));
return -1;
}
def->data.vlan.devname =
virXPathString("string(./interface/@name)", ctxt);
if (def->data.vlan.devname == NULL) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("vlan interface misses name attribute"));
return -1;
}
return 0;
}
static virInterfaceDefPtr
virInterfaceDefParseXML(xmlXPathContextPtr ctxt, int parentIfType) {
virInterfaceDefPtr def;
int type;
char *tmp;
xmlNodePtr cur = ctxt->node;
/* check @type */
tmp = virXPathString("string(./@type)", ctxt);
if (tmp == NULL) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("interface misses the type attribute"));
return NULL;
}
type = virInterfaceTypeFromString(tmp);
if (type == -1) {
virReportError(VIR_ERR_XML_ERROR,
_("unknown interface type %s"), tmp);
VIR_FREE(tmp);
return NULL;
}
VIR_FREE(tmp);
if (VIR_ALLOC(def) < 0)
return NULL;
if (((parentIfType == VIR_INTERFACE_TYPE_BOND)
&& (type != VIR_INTERFACE_TYPE_ETHERNET))
|| ((parentIfType == VIR_INTERFACE_TYPE_BRIDGE)
&& (type != VIR_INTERFACE_TYPE_ETHERNET)
&& (type != VIR_INTERFACE_TYPE_BOND)
&& (type != VIR_INTERFACE_TYPE_VLAN))
|| (parentIfType == VIR_INTERFACE_TYPE_ETHERNET)
|| (parentIfType == VIR_INTERFACE_TYPE_VLAN))
{
virReportError(VIR_ERR_XML_ERROR,
_("interface has unsupported type '%s'"),
virInterfaceTypeToString(type));
goto error;
}
def->type = type;
switch (type) {
case VIR_INTERFACE_TYPE_ETHERNET:
if (virInterfaceDefParseName(def, ctxt) < 0)
goto error;
tmp = virXPathString("string(./mac/@address)", ctxt);
if (tmp != NULL)
def->mac = tmp;
if (parentIfType == VIR_INTERFACE_TYPE_LAST) {
/* only recognize these in toplevel bond interfaces */
if (virInterfaceDefParseStartMode(def, ctxt) < 0)
goto error;
if (virInterfaceDefParseMtu(def, ctxt) < 0)
goto error;
if (virInterfaceDefParseIfAdressing(def, ctxt) < 0)
goto error;
}
break;
case VIR_INTERFACE_TYPE_BRIDGE: {
xmlNodePtr bridge;
if (virInterfaceDefParseName(def, ctxt) < 0)
goto error;
if (virInterfaceDefParseStartMode(def, ctxt) < 0)
goto error;
if (virInterfaceDefParseMtu(def, ctxt) < 0)
goto error;
if (virInterfaceDefParseIfAdressing(def, ctxt) < 0)
goto error;
bridge = virXPathNode("./bridge[1]", ctxt);
if (bridge == NULL) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("bridge interface misses the bridge element"));
goto error;
}
tmp = virXMLPropString(bridge, "stp");
def->data.bridge.stp = -1;
if (tmp != NULL) {
if (STREQ(tmp, "on")) {
def->data.bridge.stp = 1;
} else if (STREQ(tmp, "off")) {
def->data.bridge.stp = 0;
} else {
virReportError(VIR_ERR_XML_ERROR,
_("bridge interface stp should be on or off got %s"),
tmp);
VIR_FREE(tmp);
goto error;
}
VIR_FREE(tmp);
}
def->data.bridge.delay = virXMLPropString(bridge, "delay");
ctxt->node = bridge;
if (virInterfaceDefParseBridge(def, ctxt) < 0)
goto error;
break;
}
case VIR_INTERFACE_TYPE_BOND: {
xmlNodePtr bond;
if (virInterfaceDefParseName(def, ctxt) < 0)
goto error;
if (parentIfType == VIR_INTERFACE_TYPE_LAST) {
/* only recognize these in toplevel bond interfaces */
if (virInterfaceDefParseStartMode(def, ctxt) < 0)
goto error;
if (virInterfaceDefParseMtu(def, ctxt) < 0)
goto error;
if (virInterfaceDefParseIfAdressing(def, ctxt) < 0)
goto error;
}
bond = virXPathNode("./bond[1]", ctxt);
if (bond == NULL) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("bond interface misses the bond element"));
goto error;
}
ctxt->node = bond;
if (virInterfaceDefParseBond(def, ctxt) < 0)
goto error;
break;
}
case VIR_INTERFACE_TYPE_VLAN: {
xmlNodePtr vlan;
tmp = virXPathString("string(./@name)", ctxt);
if (tmp != NULL)
def->name = tmp;
if (virInterfaceDefParseStartMode(def, ctxt) < 0)
goto error;
if (virInterfaceDefParseIfAdressing(def, ctxt) < 0)
goto error;
vlan = virXPathNode("./vlan[1]", ctxt);
if (vlan == NULL) {
virReportError(VIR_ERR_XML_ERROR,
"%s", _("vlan interface misses the vlan element"));
goto error;
}
ctxt->node = vlan;
if (virInterfaceDefParseVlan(def, ctxt) < 0)
goto error;
break;
}
}
ctxt->node = cur;
return def;
error:
ctxt->node = cur;
virInterfaceDefFree(def);
return NULL;
}
virInterfaceDefPtr virInterfaceDefParseNode(xmlDocPtr xml,
xmlNodePtr root)
{
xmlXPathContextPtr ctxt = NULL;
virInterfaceDefPtr def = NULL;
if (!xmlStrEqual(root->name, BAD_CAST "interface")) {
virReportError(VIR_ERR_XML_ERROR,
_("unexpected root element <%s>, "
"expecting <interface>"),
root->name);
return NULL;
}
ctxt = xmlXPathNewContext(xml);
if (ctxt == NULL) {
virReportOOMError();
goto cleanup;
}
ctxt->node = root;
def = virInterfaceDefParseXML(ctxt, VIR_INTERFACE_TYPE_LAST);
cleanup:
xmlXPathFreeContext(ctxt);
return def;
}
static virInterfaceDefPtr
virInterfaceDefParse(const char *xmlStr,
const char *filename)
{
xmlDocPtr xml;
virInterfaceDefPtr def = NULL;
if ((xml = virXMLParse(filename, xmlStr, _("(interface_definition)")))) {
def = virInterfaceDefParseNode(xml, xmlDocGetRootElement(xml));
xmlFreeDoc(xml);
}
return def;
}
virInterfaceDefPtr virInterfaceDefParseString(const char *xmlStr)
{
return virInterfaceDefParse(xmlStr, NULL);
}
virInterfaceDefPtr virInterfaceDefParseFile(const char *filename)
{
return virInterfaceDefParse(NULL, filename);
}
static int
virInterfaceBridgeDefFormat(virBufferPtr buf,
const virInterfaceDefPtr def, int level) {
size_t i;
int ret = 0;
virBufferAsprintf(buf, "%*s <bridge", level*2, "");
if (def->data.bridge.stp == 1)
virBufferAddLit(buf, " stp='on'");
else if (def->data.bridge.stp == 0)
virBufferAddLit(buf, " stp='off'");
if (def->data.bridge.delay != NULL)
virBufferAsprintf(buf, " delay='%s'", def->data.bridge.delay);
virBufferAddLit(buf, ">\n");
for (i = 0; i < def->data.bridge.nbItf; i++) {
if (virInterfaceDefDevFormat(buf,
def->data.bridge.itf[i], level+2) < 0)
ret = -1;
}
virBufferAsprintf(buf, "%*s </bridge>\n", level*2, "");
return ret;
}
static int
virInterfaceBondDefFormat(virBufferPtr buf,
const virInterfaceDefPtr def, int level) {
size_t i;
int ret = 0;
virBufferAsprintf(buf, "%*s <bond", level*2, "");
if (def->data.bond.mode == VIR_INTERFACE_BOND_BALRR)
virBufferAddLit(buf, " mode='balance-rr'");
else if (def->data.bond.mode == VIR_INTERFACE_BOND_ABACKUP)
virBufferAddLit(buf, " mode='active-backup'");
else if (def->data.bond.mode == VIR_INTERFACE_BOND_BALXOR)
virBufferAddLit(buf, " mode='balance-xor'");
else if (def->data.bond.mode == VIR_INTERFACE_BOND_BCAST)
virBufferAddLit(buf, " mode='broadcast'");
else if (def->data.bond.mode == VIR_INTERFACE_BOND_8023AD)
virBufferAddLit(buf, " mode='802.3ad'");
else if (def->data.bond.mode == VIR_INTERFACE_BOND_BALTLB)
virBufferAddLit(buf, " mode='balance-tlb'");
else if (def->data.bond.mode == VIR_INTERFACE_BOND_BALALB)
virBufferAddLit(buf, " mode='balance-alb'");
virBufferAddLit(buf, ">\n");
if (def->data.bond.monit == VIR_INTERFACE_BOND_MONIT_MII) {
virBufferAsprintf(buf, "%*s <miimon freq='%d'",
level*2, "", def->data.bond.frequency);
if (def->data.bond.downdelay > 0)
virBufferAsprintf(buf, " downdelay='%d'", def->data.bond.downdelay);
if (def->data.bond.updelay > 0)
virBufferAsprintf(buf, " updelay='%d'", def->data.bond.updelay);
if (def->data.bond.carrier == VIR_INTERFACE_BOND_MII_IOCTL)
virBufferAddLit(buf, " carrier='ioctl'");
else if (def->data.bond.carrier == VIR_INTERFACE_BOND_MII_NETIF)
virBufferAddLit(buf, " carrier='netif'");
virBufferAddLit(buf, "/>\n");
} else if (def->data.bond.monit == VIR_INTERFACE_BOND_MONIT_ARP) {
if (def->data.bond.target == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("bond arp monitoring has no target"));
return -1;
}
virBufferAsprintf(buf, "%*s <arpmon interval='%d' target='%s'",
level*2, "",
def->data.bond.interval, def->data.bond.target);
if (def->data.bond.validate == VIR_INTERFACE_BOND_ARP_ACTIVE)
virBufferAddLit(buf, " validate='active'");
else if (def->data.bond.validate == VIR_INTERFACE_BOND_ARP_BACKUP)
virBufferAddLit(buf, " validate='backup'");
else if (def->data.bond.validate == VIR_INTERFACE_BOND_ARP_ALL)
virBufferAddLit(buf, " validate='all'");
virBufferAddLit(buf, "/>\n");
}
for (i = 0; i < def->data.bond.nbItf; i++) {
if (virInterfaceDefDevFormat(buf, def->data.bond.itf[i], level+2) < 0)
ret = -1;
}
virBufferAsprintf(buf, "%*s </bond>\n", level*2, "");
return ret;
}
static int
virInterfaceVlanDefFormat(virBufferPtr buf,
const virInterfaceDefPtr def, int level) {
if (def->data.vlan.tag == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("vlan misses the tag name"));
return -1;
}
virBufferAsprintf(buf, "%*s <vlan tag='%s'",
level*2, "", def->data.vlan.tag);
if (def->data.vlan.devname != NULL) {
virBufferAddLit(buf, ">\n");
virBufferAsprintf(buf, "%*s <interface name='%s'/>\n",
level*2, "", def->data.vlan.devname);
virBufferAsprintf(buf, "%*s </vlan>\n", level*2, "");
} else
virBufferAddLit(buf, "/>\n");
return 0;
}
static int
virInterfaceProtocolDefFormat(virBufferPtr buf, const virInterfaceDefPtr def,
int level) {
size_t i, j;
for (i = 0; i < def->nprotos; i++) {
virBufferAsprintf(buf, "%*s <protocol family='%s'>\n",
level*2, "", def->protos[i]->family);
if (def->protos[i]->autoconf) {
virBufferAsprintf(buf, "%*s <autoconf/>\n", level*2, "");
}
if (def->protos[i]->dhcp) {
if (def->protos[i]->peerdns == 0)
virBufferAsprintf(buf, "%*s <dhcp peerdns='no'/>\n",
level*2, "");
else if (def->protos[i]->peerdns == 1)
virBufferAsprintf(buf, "%*s <dhcp peerdns='yes'/>\n",
level*2, "");
else
virBufferAsprintf(buf, "%*s <dhcp/>\n", level*2, "");
}
for (j = 0; j < def->protos[i]->nips; j++) {
if (def->protos[i]->ips[j]->address != NULL) {
virBufferAsprintf(buf, "%*s <ip address='%s'", level*2, "",
def->protos[i]->ips[j]->address);
if (def->protos[i]->ips[j]->prefix != 0) {
virBufferAsprintf(buf, " prefix='%d'",
def->protos[i]->ips[j]->prefix);
}
virBufferAddLit(buf, "/>\n");
}
}
if (def->protos[i]->gateway != NULL) {
virBufferAsprintf(buf, "%*s <route gateway='%s'/>\n",
level*2, "", def->protos[i]->gateway);
}
virBufferAsprintf(buf, "%*s </protocol>\n", level*2, "");
}
return 0;
}
static int
virInterfaceStartmodeDefFormat(virBufferPtr buf,
enum virInterfaceStartMode startmode,
int level) {
const char *mode;
switch (startmode) {
case VIR_INTERFACE_START_UNSPECIFIED:
return 0;
case VIR_INTERFACE_START_NONE:
mode = "none";
break;
case VIR_INTERFACE_START_ONBOOT:
mode = "onboot";
break;
case VIR_INTERFACE_START_HOTPLUG:
mode = "hotplug";
break;
default:
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("virInterfaceDefFormat unknown startmode"));
return -1;
}
virBufferAsprintf(buf, "%*s <start mode='%s'/>\n", level*2, "", mode);
return 0;
}
static int
virInterfaceDefDevFormat(virBufferPtr buf,
const virInterfaceDefPtr def, int level) {
const char *type = NULL;
if (def == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("virInterfaceDefFormat NULL def"));
goto cleanup;
}
if ((def->name == NULL) && (def->type != VIR_INTERFACE_TYPE_VLAN)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("virInterfaceDefFormat missing interface name"));
goto cleanup;
}
if (!(type = virInterfaceTypeToString(def->type))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unexpected interface type %d"), def->type);
goto cleanup;
}
virBufferAsprintf(buf, "%*s<interface type='%s' ", level*2, "", type);
if (def->name != NULL)
virBufferEscapeString(buf, "name='%s'", def->name);
virBufferAddLit(buf, ">\n");
switch (def->type) {
case VIR_INTERFACE_TYPE_ETHERNET:
virInterfaceStartmodeDefFormat(buf, def->startmode, level);
if (def->mac != NULL)
virBufferAsprintf(buf, "%*s <mac address='%s'/>\n",
level*2, "", def->mac);
if (def->mtu != 0)
virBufferAsprintf(buf, "%*s <mtu size='%d'/>\n",
level*2, "", def->mtu);
virInterfaceProtocolDefFormat(buf, def, level);
break;
case VIR_INTERFACE_TYPE_BRIDGE:
virInterfaceStartmodeDefFormat(buf, def->startmode, level);
if (def->mtu != 0)
virBufferAsprintf(buf, "%*s <mtu size='%d'/>\n",
level*2, "", def->mtu);
virInterfaceProtocolDefFormat(buf, def, level);
virInterfaceBridgeDefFormat(buf, def, level);
break;
case VIR_INTERFACE_TYPE_BOND:
virInterfaceStartmodeDefFormat(buf, def->startmode, level);
if (def->mtu != 0)
virBufferAsprintf(buf, "%*s <mtu size='%d'/>\n",
level*2, "", def->mtu);
virInterfaceProtocolDefFormat(buf, def, level);
virInterfaceBondDefFormat(buf, def, level);
break;
case VIR_INTERFACE_TYPE_VLAN:
virInterfaceStartmodeDefFormat(buf, def->startmode, level);
if (def->mac != NULL)
virBufferAsprintf(buf, "%*s <mac address='%s'/>\n",
level*2, "", def->mac);
if (def->mtu != 0)
virBufferAsprintf(buf, "%*s <mtu size='%d'/>\n",
level*2, "", def->mtu);
virInterfaceProtocolDefFormat(buf, def, level);
virInterfaceVlanDefFormat(buf, def, level);
break;
}
virBufferAsprintf(buf, "%*s</interface>\n", level*2, "");
if (virBufferError(buf))
goto no_memory;
return 0;
no_memory:
virReportOOMError();
cleanup:
return -1;
}
char *virInterfaceDefFormat(const virInterfaceDefPtr def)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
if (virInterfaceDefDevFormat(&buf, def, 0) < 0) {
virBufferFreeAndReset(&buf);
return NULL;
}
return virBufferContentAndReset(&buf);
}
/* virInterfaceObj manipulation */
void virInterfaceObjLock(virInterfaceObjPtr obj)
{
virMutexLock(&obj->lock);
}
void virInterfaceObjUnlock(virInterfaceObjPtr obj)
{
virMutexUnlock(&obj->lock);
}
void virInterfaceObjFree(virInterfaceObjPtr iface)
{
if (!iface)
return;
virInterfaceDefFree(iface->def);
virMutexDestroy(&iface->lock);
VIR_FREE(iface);
}
/* virInterfaceObjList manipulation */
int virInterfaceFindByMACString(const virInterfaceObjListPtr interfaces,
const char *mac,
virInterfaceObjPtr *matches, int maxmatches)
{
size_t i;
unsigned int matchct = 0;
for (i = 0; i < interfaces->count; i++) {
virInterfaceObjLock(interfaces->objs[i]);
if (STRCASEEQ(interfaces->objs[i]->def->mac, mac)) {
matchct++;
if (matchct <= maxmatches) {
matches[matchct - 1] = interfaces->objs[i];
/* keep the lock if we're returning object to caller */
/* it is the caller's responsibility to unlock *all* matches */
continue;
}
}
virInterfaceObjUnlock(interfaces->objs[i]);
}
return matchct;
}
virInterfaceObjPtr virInterfaceFindByName(const virInterfaceObjListPtr
interfaces,
const char *name)
{
size_t i;
for (i = 0; i < interfaces->count; i++) {
virInterfaceObjLock(interfaces->objs[i]);
if (STREQ(interfaces->objs[i]->def->name, name))
return interfaces->objs[i];
virInterfaceObjUnlock(interfaces->objs[i]);
}
return NULL;
}
void virInterfaceObjListFree(virInterfaceObjListPtr interfaces)
{
size_t i;
for (i = 0; i < interfaces->count; i++)
virInterfaceObjFree(interfaces->objs[i]);
VIR_FREE(interfaces->objs);
interfaces->count = 0;
}
int virInterfaceObjListClone(virInterfaceObjListPtr src,
virInterfaceObjListPtr dest)
{
int ret = -1;
size_t i;
unsigned int cnt;
if (!src || !dest)
goto cleanup;
virInterfaceObjListFree(dest); /* start with an empty list */
cnt = src->count;
for (i = 0; i < cnt; i++) {
virInterfaceDefPtr def = src->objs[i]->def;
virInterfaceDefPtr backup;
virInterfaceObjPtr iface;
char *xml = virInterfaceDefFormat(def);
if (!xml)
goto cleanup;
if ((backup = virInterfaceDefParseString(xml)) == NULL) {
VIR_FREE(xml);
goto cleanup;
}
VIR_FREE(xml);
if ((iface = virInterfaceAssignDef(dest, backup)) == NULL)
goto cleanup;
virInterfaceObjUnlock(iface); /* was locked by virInterfaceAssignDef */
}
ret = cnt;
cleanup:
if ((ret < 0) && dest)
virInterfaceObjListFree(dest);
return ret;
}
virInterfaceObjPtr virInterfaceAssignDef(virInterfaceObjListPtr interfaces,
const virInterfaceDefPtr def)
{
virInterfaceObjPtr iface;
if ((iface = virInterfaceFindByName(interfaces, def->name))) {
virInterfaceDefFree(iface->def);
iface->def = def;
return iface;
}
if (VIR_ALLOC(iface) < 0)
return NULL;
if (virMutexInit(&iface->lock) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("cannot initialize mutex"));
VIR_FREE(iface);
return NULL;
}
virInterfaceObjLock(iface);
iface->def = def;
if (VIR_REALLOC_N(interfaces->objs, interfaces->count + 1) < 0) {
VIR_FREE(iface);
return NULL;
}
interfaces->objs[interfaces->count] = iface;
interfaces->count++;
return iface;
}
void virInterfaceRemove(virInterfaceObjListPtr interfaces,
const virInterfaceObjPtr iface)
{
size_t i;
virInterfaceObjUnlock(iface);
for (i = 0; i < interfaces->count; i++) {
virInterfaceObjLock(interfaces->objs[i]);
if (interfaces->objs[i] == iface) {
virInterfaceObjUnlock(interfaces->objs[i]);
virInterfaceObjFree(interfaces->objs[i]);
if (i < (interfaces->count - 1))
memmove(interfaces->objs + i, interfaces->objs + i + 1,
sizeof(*(interfaces->objs)) * (interfaces->count - (i + 1)));
if (VIR_REALLOC_N(interfaces->objs, interfaces->count - 1) < 0) {
; /* Failure to reduce memory allocation isn't fatal */
}
interfaces->count--;
break;
}
virInterfaceObjUnlock(interfaces->objs[i]);
}
}
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