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|
/*
* interface_driver.c: backend driver methods to handle physical
* interface configuration using the netcf library.
*
* Copyright (C) 2006-2011 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: Laine Stump <laine@redhat.com>
*/
#include <config.h>
#include <netcf.h>
#include "virterror_internal.h"
#include "datatypes.h"
#include "interface_driver.h"
#include "interface_conf.h"
#include "memory.h"
#include "logging.h"
#define VIR_FROM_THIS VIR_FROM_INTERFACE
/* Main driver state */
struct interface_driver
{
virMutex lock;
struct netcf *netcf;
};
static void interfaceDriverLock(struct interface_driver *driver)
{
virMutexLock(&driver->lock);
}
static void interfaceDriverUnlock(struct interface_driver *driver)
{
virMutexUnlock(&driver->lock);
}
static int netcf_to_vir_err(int netcf_errcode)
{
switch (netcf_errcode)
{
case NETCF_NOERROR:
/* no error, everything ok */
return VIR_ERR_OK;
case NETCF_EINTERNAL:
/* internal error, aka bug */
return VIR_ERR_INTERNAL_ERROR;
case NETCF_EOTHER:
/* other error, copout for being more specific */
return VIR_ERR_INTERNAL_ERROR;
case NETCF_ENOMEM:
/*
* allocation failed return VIR ERR NO MEMORY
* though it should not be used now.
*/
return 2;
case NETCF_EXMLPARSER:
/* XML parser choked */
return VIR_ERR_XML_ERROR;
case NETCF_EXMLINVALID:
/* XML invalid in some form */
return VIR_ERR_XML_ERROR;
case NETCF_ENOENT:
/* Required entry in a tree is missing */
return VIR_ERR_INTERNAL_ERROR;
case NETCF_EEXEC:
/* external program execution failed or returned non-0 */
return VIR_ERR_INTERNAL_ERROR;
#ifdef NETCF_EINVALIDOP
case NETCF_EINVALIDOP:
/* attempted operation is invalid while the system is in the current state. */
return VIR_ERR_OPERATION_INVALID;
#endif
default:
return VIR_ERR_INTERNAL_ERROR;
}
}
static struct netcf_if *interfaceDriverGetNetcfIF(struct netcf *ncf, virInterfacePtr ifinfo)
{
/* 1) caller already has lock,
* 2) caller cleans up iface on return
*/
struct netcf_if *iface = ncf_lookup_by_name(ncf, ifinfo->name);
if (!iface) {
const char *errmsg, *details;
int errcode = ncf_error(ncf, &errmsg, &details);
if (errcode != NETCF_NOERROR) {
virReportError(netcf_to_vir_err(errcode),
_("couldn't find interface named '%s': %s%s%s"),
ifinfo->name, errmsg, details ? " - " : "",
details ? details : "");
} else {
virReportError(VIR_ERR_NO_INTERFACE,
_("couldn't find interface named '%s'"),
ifinfo->name);
}
}
return iface;
}
static virDrvOpenStatus interfaceOpenInterface(virConnectPtr conn,
virConnectAuthPtr auth ATTRIBUTE_UNUSED,
unsigned int flags)
{
struct interface_driver *driverState;
virCheckFlags(VIR_CONNECT_RO, VIR_DRV_OPEN_ERROR);
if (VIR_ALLOC(driverState) < 0)
{
virReportOOMError();
goto alloc_error;
}
/* initialize non-0 stuff in driverState */
if (virMutexInit(&driverState->lock) < 0)
{
/* what error to report? */
goto mutex_error;
}
/* open netcf */
if (ncf_init(&driverState->netcf, NULL) != 0)
{
/* what error to report? */
goto netcf_error;
}
conn->interfacePrivateData = driverState;
return VIR_DRV_OPEN_SUCCESS;
netcf_error:
if (driverState->netcf)
{
ncf_close(driverState->netcf);
}
virMutexDestroy (&driverState->lock);
mutex_error:
VIR_FREE(driverState);
alloc_error:
return VIR_DRV_OPEN_ERROR;
}
static int interfaceCloseInterface(virConnectPtr conn)
{
if (conn->interfacePrivateData != NULL)
{
struct interface_driver *driver = conn->interfacePrivateData;
/* close netcf instance */
ncf_close(driver->netcf);
/* destroy lock */
virMutexDestroy(&driver->lock);
/* free driver state */
VIR_FREE(driver);
}
conn->interfacePrivateData = NULL;
return 0;
}
static int interfaceNumOfInterfaces(virConnectPtr conn)
{
int count;
struct interface_driver *driver = conn->interfacePrivateData;
interfaceDriverLock(driver);
count = ncf_num_of_interfaces(driver->netcf, NETCF_IFACE_ACTIVE);
if (count < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to get number of interfaces on host: %s%s%s"),
errmsg, details ? " - " : "", details ? details : "");
}
interfaceDriverUnlock(driver);
return count;
}
static int interfaceListInterfaces(virConnectPtr conn, char **const names, int nnames)
{
struct interface_driver *driver = conn->interfacePrivateData;
int count;
interfaceDriverLock(driver);
count = ncf_list_interfaces(driver->netcf, nnames, names, NETCF_IFACE_ACTIVE);
if (count < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to list host interfaces: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
}
interfaceDriverUnlock(driver);
return count;
}
static int interfaceNumOfDefinedInterfaces(virConnectPtr conn)
{
int count;
struct interface_driver *driver = conn->interfacePrivateData;
interfaceDriverLock(driver);
count = ncf_num_of_interfaces(driver->netcf, NETCF_IFACE_INACTIVE);
if (count < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to get number of defined interfaces on host: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
}
interfaceDriverUnlock(driver);
return count;
}
static int interfaceListDefinedInterfaces(virConnectPtr conn, char **const names, int nnames)
{
struct interface_driver *driver = conn->interfacePrivateData;
int count;
interfaceDriverLock(driver);
count = ncf_list_interfaces(driver->netcf, nnames, names, NETCF_IFACE_INACTIVE);
if (count < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to list host defined interfaces: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
}
interfaceDriverUnlock(driver);
return count;
}
static int
interfaceListAllInterfaces(virConnectPtr conn,
virInterfacePtr **ifaces,
unsigned int flags)
{
struct interface_driver *driver = conn->interfacePrivateData;
int count;
int i;
struct netcf_if *iface = NULL;
virInterfacePtr *tmp_iface_objs = NULL;
virInterfacePtr iface_obj = NULL;
unsigned int status;
int niface_objs = 0;
int ret = -1;
char **names = NULL;
virCheckFlags(VIR_CONNECT_LIST_INTERFACES_ACTIVE |
VIR_CONNECT_LIST_INTERFACES_INACTIVE, -1);
interfaceDriverLock(driver);
/* List all interfaces, in case of we might support new filter flags
* except active|inactive in future.
*/
count = ncf_num_of_interfaces(driver->netcf, NETCF_IFACE_ACTIVE |
NETCF_IFACE_INACTIVE);
if (count < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to get number of host interfaces: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
ret = -1;
goto cleanup;
}
if (count == 0) {
ret = 0;
goto cleanup;
}
if (VIR_ALLOC_N(names, count) < 0) {
virReportOOMError();
ret = -1;
goto cleanup;
}
if ((count = ncf_list_interfaces(driver->netcf, count, names,
NETCF_IFACE_ACTIVE |
NETCF_IFACE_INACTIVE)) < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to list host interfaces: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
goto cleanup;
}
if (ifaces) {
if (VIR_ALLOC_N(tmp_iface_objs, count + 1) < 0) {
virReportOOMError();
goto cleanup;
}
}
for (i = 0; i < count; i++) {
iface = ncf_lookup_by_name(driver->netcf, names[i]);
if (!iface) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
if (errcode != NETCF_NOERROR) {
virReportError(netcf_to_vir_err(errcode),
_("couldn't find interface named '%s': %s%s%s"),
names[i], errmsg,
details ? " - " : "", details ? details : "");
goto cleanup;
} else {
/* Ignore the NETCF_NOERROR, as the interface is very likely
* deleted by other management apps (e.g. virt-manager).
*/
VIR_WARN("couldn't find interface named '%s', might be "
"deleted by other process", names[i]);
continue;
}
}
if (ncf_if_status(iface, &status) < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to get status of interface %s: %s%s%s"),
names[i], errmsg, details ? " - " : "",
details ? details : "");
goto cleanup;
}
/* XXX: Filter the result, need to be splitted once new filter flags
* except active|inactive are supported.
*/
if (((status & NETCF_IFACE_ACTIVE) &&
(flags & VIR_CONNECT_LIST_INTERFACES_ACTIVE)) ||
((status & NETCF_IFACE_INACTIVE) &&
(flags & VIR_CONNECT_LIST_INTERFACES_INACTIVE))) {
if (ifaces) {
iface_obj = virGetInterface(conn, ncf_if_name(iface),
ncf_if_mac_string(iface));
tmp_iface_objs[niface_objs] = iface_obj;
}
niface_objs++;
}
ncf_if_free(iface);
iface = NULL;
}
if (tmp_iface_objs) {
/* trim the array to the final size */
ignore_value(VIR_REALLOC_N(tmp_iface_objs, niface_objs + 1));
*ifaces = tmp_iface_objs;
tmp_iface_objs = NULL;
}
ret = niface_objs;
cleanup:
ncf_if_free(iface);
if (names)
for (i = 0; i < count; i++)
VIR_FREE(names[i]);
VIR_FREE(names);
if (tmp_iface_objs) {
for (i = 0; i < niface_objs; i++) {
if (tmp_iface_objs[i])
virInterfaceFree(tmp_iface_objs[i]);
}
}
interfaceDriverUnlock(driver);
return ret;
}
static virInterfacePtr interfaceLookupByName(virConnectPtr conn,
const char *name)
{
struct interface_driver *driver = conn->interfacePrivateData;
struct netcf_if *iface;
virInterfacePtr ret = NULL;
interfaceDriverLock(driver);
iface = ncf_lookup_by_name(driver->netcf, name);
if (!iface) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
if (errcode != NETCF_NOERROR) {
virReportError(netcf_to_vir_err(errcode),
_("couldn't find interface named '%s': %s%s%s"),
name, errmsg,
details ? " - " : "", details ? details : "");
} else {
virReportError(VIR_ERR_NO_INTERFACE,
_("couldn't find interface named '%s'"), name);
}
goto cleanup;
}
ret = virGetInterface(conn, ncf_if_name(iface), ncf_if_mac_string(iface));
cleanup:
ncf_if_free(iface);
interfaceDriverUnlock(driver);
return ret;
}
static virInterfacePtr interfaceLookupByMACString(virConnectPtr conn,
const char *macstr)
{
struct interface_driver *driver = conn->interfacePrivateData;
struct netcf_if *iface;
int niface;
virInterfacePtr ret = NULL;
interfaceDriverLock(driver);
niface = ncf_lookup_by_mac_string(driver->netcf, macstr, 1, &iface);
if (niface < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("couldn't find interface with MAC address '%s': %s%s%s"),
macstr, errmsg, details ? " - " : "",
details ? details : "");
goto cleanup;
}
if (niface == 0) {
virReportError(VIR_ERR_NO_INTERFACE,
_("couldn't find interface with MAC address '%s'"),
macstr);
goto cleanup;
}
if (niface > 1) {
virReportError(VIR_ERR_MULTIPLE_INTERFACES,
"%s", _("multiple interfaces with matching MAC address"));
goto cleanup;
}
ret = virGetInterface(conn, ncf_if_name(iface), ncf_if_mac_string(iface));
cleanup:
ncf_if_free(iface);
interfaceDriverUnlock(driver);
return ret;
}
static char *interfaceGetXMLDesc(virInterfacePtr ifinfo,
unsigned int flags)
{
struct interface_driver *driver = ifinfo->conn->interfacePrivateData;
struct netcf_if *iface = NULL;
char *xmlstr = NULL;
virInterfaceDefPtr ifacedef = NULL;
char *ret = NULL;
virCheckFlags(VIR_INTERFACE_XML_INACTIVE, NULL);
interfaceDriverLock(driver);
iface = interfaceDriverGetNetcfIF(driver->netcf, ifinfo);
if (!iface) {
/* helper already reported error */
goto cleanup;
}
if ((flags & VIR_INTERFACE_XML_INACTIVE)) {
xmlstr = ncf_if_xml_desc(iface);
} else {
xmlstr = ncf_if_xml_state(iface);
}
if (!xmlstr) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("could not get interface XML description: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
goto cleanup;
}
ifacedef = virInterfaceDefParseString(xmlstr);
if (!ifacedef) {
/* error was already reported */
goto cleanup;
}
ret = virInterfaceDefFormat(ifacedef);
if (!ret) {
/* error was already reported */
goto cleanup;
}
cleanup:
ncf_if_free(iface);
VIR_FREE(xmlstr);
virInterfaceDefFree(ifacedef);
interfaceDriverUnlock(driver);
return ret;
}
static virInterfacePtr interfaceDefineXML(virConnectPtr conn,
const char *xml,
unsigned int flags)
{
struct interface_driver *driver = conn->interfacePrivateData;
struct netcf_if *iface = NULL;
char *xmlstr = NULL;
virInterfaceDefPtr ifacedef = NULL;
virInterfacePtr ret = NULL;
virCheckFlags(0, NULL);
interfaceDriverLock(driver);
ifacedef = virInterfaceDefParseString(xml);
if (!ifacedef) {
/* error was already reported */
goto cleanup;
}
xmlstr = virInterfaceDefFormat(ifacedef);
if (!xmlstr) {
/* error was already reported */
goto cleanup;
}
iface = ncf_define(driver->netcf, xmlstr);
if (!iface) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("could not get interface XML description: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
goto cleanup;
}
ret = virGetInterface(conn, ncf_if_name(iface), ncf_if_mac_string(iface));
cleanup:
ncf_if_free(iface);
VIR_FREE(xmlstr);
virInterfaceDefFree(ifacedef);
interfaceDriverUnlock(driver);
return ret;
}
static int interfaceUndefine(virInterfacePtr ifinfo) {
struct interface_driver *driver = ifinfo->conn->interfacePrivateData;
struct netcf_if *iface = NULL;
int ret = -1;
interfaceDriverLock(driver);
iface = interfaceDriverGetNetcfIF(driver->netcf, ifinfo);
if (!iface) {
/* helper already reported error */
goto cleanup;
}
ret = ncf_if_undefine(iface);
if (ret < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to undefine interface %s: %s%s%s"),
ifinfo->name, errmsg, details ? " - " : "",
details ? details : "");
goto cleanup;
}
cleanup:
ncf_if_free(iface);
interfaceDriverUnlock(driver);
return ret;
}
static int interfaceCreate(virInterfacePtr ifinfo,
unsigned int flags)
{
struct interface_driver *driver = ifinfo->conn->interfacePrivateData;
struct netcf_if *iface = NULL;
int ret = -1;
virCheckFlags(0, -1);
interfaceDriverLock(driver);
iface = interfaceDriverGetNetcfIF(driver->netcf, ifinfo);
if (!iface) {
/* helper already reported error */
goto cleanup;
}
ret = ncf_if_up(iface);
if (ret < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to create (start) interface %s: %s%s%s"),
ifinfo->name, errmsg, details ? " - " : "",
details ? details : "");
goto cleanup;
}
cleanup:
ncf_if_free(iface);
interfaceDriverUnlock(driver);
return ret;
}
static int interfaceDestroy(virInterfacePtr ifinfo,
unsigned int flags)
{
struct interface_driver *driver = ifinfo->conn->interfacePrivateData;
struct netcf_if *iface = NULL;
int ret = -1;
virCheckFlags(0, -1);
interfaceDriverLock(driver);
iface = interfaceDriverGetNetcfIF(driver->netcf, ifinfo);
if (!iface) {
/* helper already reported error */
goto cleanup;
}
ret = ncf_if_down(iface);
if (ret < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to destroy (stop) interface %s: %s%s%s"),
ifinfo->name, errmsg, details ? " - " : "",
details ? details : "");
goto cleanup;
}
cleanup:
ncf_if_free(iface);
interfaceDriverUnlock(driver);
return ret;
}
static int interfaceIsActive(virInterfacePtr ifinfo)
{
struct interface_driver *driver = ifinfo->conn->interfacePrivateData;
struct netcf_if *iface = NULL;
unsigned int flags = 0;
int ret = -1;
interfaceDriverLock(driver);
iface = interfaceDriverGetNetcfIF(driver->netcf, ifinfo);
if (!iface) {
/* helper already reported error */
goto cleanup;
}
if (ncf_if_status(iface, &flags) < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to get status of interface %s: %s%s%s"),
ifinfo->name, errmsg, details ? " - " : "",
details ? details : "");
goto cleanup;
}
ret = flags & NETCF_IFACE_ACTIVE ? 1 : 0;
cleanup:
ncf_if_free(iface);
interfaceDriverUnlock(driver);
return ret;
}
#ifdef HAVE_NETCF_TRANSACTIONS
static int interfaceChangeBegin(virConnectPtr conn, unsigned int flags)
{
struct interface_driver *driver = conn->interfacePrivateData;
int ret;
virCheckFlags(0, -1); /* currently flags must be 0 */
interfaceDriverLock(driver);
ret = ncf_change_begin(driver->netcf, 0);
if (ret < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to begin transaction: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
}
interfaceDriverUnlock(driver);
return ret;
}
static int interfaceChangeCommit(virConnectPtr conn, unsigned int flags)
{
struct interface_driver *driver = conn->interfacePrivateData;
int ret;
virCheckFlags(0, -1); /* currently flags must be 0 */
interfaceDriverLock(driver);
ret = ncf_change_commit(driver->netcf, 0);
if (ret < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to commit transaction: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
}
interfaceDriverUnlock(driver);
return ret;
}
static int interfaceChangeRollback(virConnectPtr conn, unsigned int flags)
{
struct interface_driver *driver = conn->interfacePrivateData;
int ret;
virCheckFlags(0, -1); /* currently flags must be 0 */
interfaceDriverLock(driver);
ret = ncf_change_rollback(driver->netcf, 0);
if (ret < 0) {
const char *errmsg, *details;
int errcode = ncf_error(driver->netcf, &errmsg, &details);
virReportError(netcf_to_vir_err(errcode),
_("failed to rollback transaction: %s%s%s"),
errmsg, details ? " - " : "",
details ? details : "");
}
interfaceDriverUnlock(driver);
return ret;
}
#endif /* HAVE_NETCF_TRANSACTIONS */
static virInterfaceDriver interfaceDriver = {
"Interface",
.open = interfaceOpenInterface, /* 0.7.0 */
.close = interfaceCloseInterface, /* 0.7.0 */
.numOfInterfaces = interfaceNumOfInterfaces, /* 0.7.0 */
.listInterfaces = interfaceListInterfaces, /* 0.7.0 */
.numOfDefinedInterfaces = interfaceNumOfDefinedInterfaces, /* 0.7.0 */
.listDefinedInterfaces = interfaceListDefinedInterfaces, /* 0.7.0 */
.listAllInterfaces = interfaceListAllInterfaces, /* 0.10.2 */
.interfaceLookupByName = interfaceLookupByName, /* 0.7.0 */
.interfaceLookupByMACString = interfaceLookupByMACString, /* 0.7.0 */
.interfaceGetXMLDesc = interfaceGetXMLDesc, /* 0.7.0 */
.interfaceDefineXML = interfaceDefineXML, /* 0.7.0 */
.interfaceUndefine = interfaceUndefine, /* 0.7.0 */
.interfaceCreate = interfaceCreate, /* 0.7.0 */
.interfaceDestroy = interfaceDestroy, /* 0.7.0 */
.interfaceIsActive = interfaceIsActive, /* 0.7.3 */
#ifdef HAVE_NETCF_TRANSACTIONS
.interfaceChangeBegin = interfaceChangeBegin, /* 0.9.2 */
.interfaceChangeCommit = interfaceChangeCommit, /* 0.9.2 */
.interfaceChangeRollback = interfaceChangeRollback, /* 0.9.2 */
#endif /* HAVE_NETCF_TRANSACTIONS */
};
int interfaceRegister(void) {
virRegisterInterfaceDriver(&interfaceDriver);
return 0;
}
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