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libvirt/tools/virsh-interface.c

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/*
* virsh-interface.c: Commands to manage host interface
*
* Copyright (C) 2005, 2007-2012 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/>.
*
* Daniel Veillard <veillard@redhat.com>
* Karel Zak <kzak@redhat.com>
* Daniel P. Berrange <berrange@redhat.com>
*
*/
#include <config.h>
#include "virsh-interface.h"
#include <libxml/parser.h>
#include <libxml/tree.h>
#include <libxml/xpath.h>
#include <libxml/xmlsave.h>
#include "internal.h"
#include "buf.h"
#include "memory.h"
#include "util.h"
#include "xml.h"
virInterfacePtr
vshCommandOptInterfaceBy(vshControl *ctl, const vshCmd *cmd,
const char *optname,
const char **name, unsigned int flags)
{
virInterfacePtr iface = NULL;
const char *n = NULL;
virCheckFlags(VSH_BYNAME | VSH_BYMAC, NULL);
if (!optname)
optname = "interface";
if (!vshCmdHasOption(ctl, cmd, optname))
return NULL;
if (vshCommandOptString(cmd, optname, &n) <= 0)
return NULL;
vshDebug(ctl, VSH_ERR_INFO, "%s: found option <%s>: %s\n",
cmd->def->name, optname, n);
if (name)
*name = n;
/* try it by NAME */
if (flags & VSH_BYNAME) {
vshDebug(ctl, VSH_ERR_DEBUG, "%s: <%s> trying as interface NAME\n",
cmd->def->name, optname);
iface = virInterfaceLookupByName(ctl->conn, n);
}
/* try it by MAC */
if (!iface && (flags & VSH_BYMAC)) {
vshDebug(ctl, VSH_ERR_DEBUG, "%s: <%s> trying as interface MAC\n",
cmd->def->name, optname);
iface = virInterfaceLookupByMACString(ctl->conn, n);
}
if (!iface)
vshError(ctl, _("failed to get interface '%s'"), n);
return iface;
}
/*
* "iface-edit" command
*/
static const vshCmdInfo info_interface_edit[] = {
{"help", N_("edit XML configuration for a physical host interface")},
{"desc", N_("Edit the XML configuration for a physical host interface.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_edit[] = {
{"interface", VSH_OT_DATA, VSH_OFLAG_REQ, N_("interface name or MAC address")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceEdit(vshControl *ctl, const vshCmd *cmd)
{
bool ret = false;
virInterfacePtr iface = NULL;
virInterfacePtr iface_edited = NULL;
unsigned int flags = VIR_INTERFACE_XML_INACTIVE;
iface = vshCommandOptInterface(ctl, cmd, NULL);
if (iface == NULL)
goto cleanup;
#define EDIT_GET_XML virInterfaceGetXMLDesc(iface, flags)
#define EDIT_NOT_CHANGED \
vshPrint(ctl, _("Interface %s XML configuration not changed.\n"), \
virInterfaceGetName(iface)); \
ret = true; goto edit_cleanup;
#define EDIT_DEFINE \
(iface_edited = virInterfaceDefineXML(ctl->conn, doc_edited, 0))
#define EDIT_FREE \
if (iface_edited) \
virInterfaceFree(iface_edited);
#include "virsh-edit.c"
vshPrint(ctl, _("Interface %s XML configuration edited.\n"),
virInterfaceGetName(iface_edited));
ret = true;
cleanup:
if (iface)
virInterfaceFree(iface);
if (iface_edited)
virInterfaceFree(iface_edited);
return ret;
}
static int
vshInterfaceSorter(const void *a, const void *b)
{
virInterfacePtr *ia = (virInterfacePtr *) a;
virInterfacePtr *ib = (virInterfacePtr *) b;
if (*ia && !*ib)
return -1;
if (!*ia)
return *ib != NULL;
return vshStrcasecmp(virInterfaceGetName(*ia),
virInterfaceGetName(*ib));
}
struct vshInterfaceList {
virInterfacePtr *ifaces;
size_t nifaces;
};
typedef struct vshInterfaceList *vshInterfaceListPtr;
static void
vshInterfaceListFree(vshInterfaceListPtr list)
{
int i;
if (list && list->nifaces) {
for (i = 0; i < list->nifaces; i++) {
if (list->ifaces[i])
virInterfaceFree(list->ifaces[i]);
}
VIR_FREE(list->ifaces);
}
VIR_FREE(list);
}
static vshInterfaceListPtr
vshInterfaceListCollect(vshControl *ctl,
unsigned int flags)
{
vshInterfaceListPtr list = vshMalloc(ctl, sizeof(*list));
int i;
int ret;
char **activeNames = NULL;
char **inactiveNames = NULL;
virInterfacePtr iface;
bool success = false;
size_t deleted = 0;
int nActiveIfaces = 0;
int nInactiveIfaces = 0;
int nAllIfaces = 0;
/* try the list with flags support (0.10.2 and later) */
if ((ret = virConnectListAllInterfaces(ctl->conn,
&list->ifaces,
flags)) >= 0) {
list->nifaces = ret;
goto finished;
}
/* check if the command is actually supported */
if (last_error && last_error->code == VIR_ERR_NO_SUPPORT)
goto fallback;
/* there was an error during the first or second call */
vshError(ctl, "%s", _("Failed to list interfaces"));
goto cleanup;
fallback:
/* fall back to old method (0.10.1 and older) */
vshResetLibvirtError();
if (flags & VIR_CONNECT_LIST_INTERFACES_ACTIVE) {
nActiveIfaces = virConnectNumOfInterfaces(ctl->conn);
if (nActiveIfaces < 0) {
vshError(ctl, "%s", _("Failed to list active interfaces"));
goto cleanup;
}
if (nActiveIfaces) {
activeNames = vshMalloc(ctl, sizeof(char *) * nActiveIfaces);
if ((nActiveIfaces = virConnectListInterfaces(ctl->conn, activeNames,
nActiveIfaces)) < 0) {
vshError(ctl, "%s", _("Failed to list active interfaces"));
goto cleanup;
}
}
}
if (flags & VIR_CONNECT_LIST_INTERFACES_INACTIVE) {
nInactiveIfaces = virConnectNumOfDefinedInterfaces(ctl->conn);
if (nInactiveIfaces < 0) {
vshError(ctl, "%s", _("Failed to list inactive interfaces"));
goto cleanup;
}
if (nInactiveIfaces) {
inactiveNames = vshMalloc(ctl, sizeof(char *) * nInactiveIfaces);
if ((nInactiveIfaces =
virConnectListDefinedInterfaces(ctl->conn, inactiveNames,
nInactiveIfaces)) < 0) {
vshError(ctl, "%s", _("Failed to list inactive interfaces"));
goto cleanup;
}
}
}
nAllIfaces = nActiveIfaces + nInactiveIfaces;
if (nAllIfaces == 0) {
VIR_FREE(activeNames);
VIR_FREE(inactiveNames);
return list;
}
list->ifaces = vshMalloc(ctl, sizeof(virInterfacePtr) * (nAllIfaces));
list->nifaces = 0;
/* get active interfaces */
for (i = 0; i < nActiveIfaces; i++) {
if (!(iface = virInterfaceLookupByName(ctl->conn, activeNames[i]))) {
vshResetLibvirtError();
continue;
}
list->ifaces[list->nifaces++] = iface;
}
/* get inactive interfaces */
for (i = 0; i < nInactiveIfaces; i++) {
if (!(iface = virInterfaceLookupByName(ctl->conn, inactiveNames[i]))) {
vshResetLibvirtError();
continue;
}
list->ifaces[list->nifaces++] = iface;
}
/* truncate interfaces that weren't found */
deleted = nAllIfaces - list->nifaces;
finished:
/* sort the list */
if (list->ifaces && list->nifaces)
qsort(list->ifaces, list->nifaces,
sizeof(*list->ifaces), vshInterfaceSorter);
/* truncate the list if filter simulation deleted entries */
if (deleted)
VIR_SHRINK_N(list->ifaces, list->nifaces, deleted);
success = true;
cleanup:
for (i = 0; i < nActiveIfaces; i++)
VIR_FREE(activeNames[i]);
for (i = 0; i < nInactiveIfaces; i++)
VIR_FREE(inactiveNames[i]);
VIR_FREE(activeNames);
VIR_FREE(inactiveNames);
if (!success) {
vshInterfaceListFree(list);
list = NULL;
}
return list;
}
/*
* "iface-list" command
*/
static const vshCmdInfo info_interface_list[] = {
{"help", N_("list physical host interfaces")},
{"desc", N_("Returns list of physical host interfaces.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_list[] = {
{"inactive", VSH_OT_BOOL, 0, N_("list inactive interfaces")},
{"all", VSH_OT_BOOL, 0, N_("list inactive & active interfaces")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceList(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
{
bool inactive = vshCommandOptBool(cmd, "inactive");
bool all = vshCommandOptBool(cmd, "all");
unsigned int flags = VIR_CONNECT_LIST_INTERFACES_ACTIVE;
vshInterfaceListPtr list = NULL;
int i;
if (inactive)
flags = VIR_CONNECT_LIST_INTERFACES_INACTIVE;
if (all)
flags = VIR_CONNECT_LIST_INTERFACES_INACTIVE |
VIR_CONNECT_LIST_INTERFACES_ACTIVE;
if (!(list = vshInterfaceListCollect(ctl, flags)))
return false;
vshPrintExtra(ctl, "%-20s %-10s %s\n", _("Name"), _("State"),
_("MAC Address"));
vshPrintExtra(ctl, "--------------------------------------------\n");
for (i = 0; i < list->nifaces; i++) {
virInterfacePtr iface = list->ifaces[i];
vshPrint(ctl, "%-20s %-10s %s\n",
virInterfaceGetName(iface),
virInterfaceIsActive(iface) ? _("active") : _("inactive"),
virInterfaceGetMACString(iface));
}
vshInterfaceListFree(list);
return true;
}
/*
* "iface-name" command
*/
static const vshCmdInfo info_interface_name[] = {
{"help", N_("convert an interface MAC address to interface name")},
{"desc", ""},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_name[] = {
{"interface", VSH_OT_DATA, VSH_OFLAG_REQ, N_("interface mac")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceName(vshControl *ctl, const vshCmd *cmd)
{
virInterfacePtr iface;
if (!(iface = vshCommandOptInterfaceBy(ctl, cmd, NULL, NULL,
VSH_BYMAC)))
return false;
vshPrint(ctl, "%s\n", virInterfaceGetName(iface));
virInterfaceFree(iface);
return true;
}
/*
* "iface-mac" command
*/
static const vshCmdInfo info_interface_mac[] = {
{"help", N_("convert an interface name to interface MAC address")},
{"desc", ""},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_mac[] = {
{"interface", VSH_OT_DATA, VSH_OFLAG_REQ, N_("interface name")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceMAC(vshControl *ctl, const vshCmd *cmd)
{
virInterfacePtr iface;
if (!(iface = vshCommandOptInterfaceBy(ctl, cmd, NULL, NULL,
VSH_BYNAME)))
return false;
vshPrint(ctl, "%s\n", virInterfaceGetMACString(iface));
virInterfaceFree(iface);
return true;
}
/*
* "iface-dumpxml" command
*/
static const vshCmdInfo info_interface_dumpxml[] = {
{"help", N_("interface information in XML")},
{"desc", N_("Output the physical host interface information as an XML dump to stdout.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_dumpxml[] = {
{"interface", VSH_OT_DATA, VSH_OFLAG_REQ, N_("interface name or MAC address")},
{"inactive", VSH_OT_BOOL, 0, N_("show inactive defined XML")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceDumpXML(vshControl *ctl, const vshCmd *cmd)
{
virInterfacePtr iface;
bool ret = true;
char *dump;
unsigned int flags = 0;
bool inactive = vshCommandOptBool(cmd, "inactive");
if (inactive)
flags |= VIR_INTERFACE_XML_INACTIVE;
if (!(iface = vshCommandOptInterface(ctl, cmd, NULL)))
return false;
dump = virInterfaceGetXMLDesc(iface, flags);
if (dump != NULL) {
vshPrint(ctl, "%s", dump);
VIR_FREE(dump);
} else {
ret = false;
}
virInterfaceFree(iface);
return ret;
}
/*
* "iface-define" command
*/
static const vshCmdInfo info_interface_define[] = {
{"help", N_("define (but don't start) a physical host interface from an XML file")},
{"desc", N_("Define a physical host interface.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_define[] = {
{"file", VSH_OT_DATA, VSH_OFLAG_REQ, N_("file containing an XML interface description")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceDefine(vshControl *ctl, const vshCmd *cmd)
{
virInterfacePtr iface;
const char *from = NULL;
bool ret = true;
char *buffer;
if (vshCommandOptString(cmd, "file", &from) <= 0)
return false;
if (virFileReadAll(from, VSH_MAX_XML_FILE, &buffer) < 0)
return false;
iface = virInterfaceDefineXML(ctl->conn, buffer, 0);
VIR_FREE(buffer);
if (iface != NULL) {
vshPrint(ctl, _("Interface %s defined from %s\n"),
virInterfaceGetName(iface), from);
virInterfaceFree(iface);
} else {
vshError(ctl, _("Failed to define interface from %s"), from);
ret = false;
}
return ret;
}
/*
* "iface-undefine" command
*/
static const vshCmdInfo info_interface_undefine[] = {
{"help", N_("undefine a physical host interface (remove it from configuration)")},
{"desc", N_("undefine an interface.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_undefine[] = {
{"interface", VSH_OT_DATA, VSH_OFLAG_REQ, N_("interface name or MAC address")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceUndefine(vshControl *ctl, const vshCmd *cmd)
{
virInterfacePtr iface;
bool ret = true;
const char *name;
if (!(iface = vshCommandOptInterface(ctl, cmd, &name)))
return false;
if (virInterfaceUndefine(iface) == 0) {
vshPrint(ctl, _("Interface %s undefined\n"), name);
} else {
vshError(ctl, _("Failed to undefine interface %s"), name);
ret = false;
}
virInterfaceFree(iface);
return ret;
}
/*
* "iface-start" command
*/
static const vshCmdInfo info_interface_start[] = {
{"help", N_("start a physical host interface (enable it / \"if-up\")")},
{"desc", N_("start a physical host interface.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_start[] = {
{"interface", VSH_OT_DATA, VSH_OFLAG_REQ, N_("interface name or MAC address")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceStart(vshControl *ctl, const vshCmd *cmd)
{
virInterfacePtr iface;
bool ret = true;
const char *name;
if (!(iface = vshCommandOptInterface(ctl, cmd, &name)))
return false;
if (virInterfaceCreate(iface, 0) == 0) {
vshPrint(ctl, _("Interface %s started\n"), name);
} else {
vshError(ctl, _("Failed to start interface %s"), name);
ret = false;
}
virInterfaceFree(iface);
return ret;
}
/*
* "iface-destroy" command
*/
static const vshCmdInfo info_interface_destroy[] = {
{"help", N_("destroy a physical host interface (disable it / \"if-down\")")},
{"desc", N_("forcefully stop a physical host interface.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_destroy[] = {
{"interface", VSH_OT_DATA, VSH_OFLAG_REQ, N_("interface name or MAC address")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceDestroy(vshControl *ctl, const vshCmd *cmd)
{
virInterfacePtr iface;
bool ret = true;
const char *name;
if (!(iface = vshCommandOptInterface(ctl, cmd, &name)))
return false;
if (virInterfaceDestroy(iface, 0) == 0) {
vshPrint(ctl, _("Interface %s destroyed\n"), name);
} else {
vshError(ctl, _("Failed to destroy interface %s"), name);
ret = false;
}
virInterfaceFree(iface);
return ret;
}
/*
* "iface-begin" command
*/
static const vshCmdInfo info_interface_begin[] = {
{"help", N_("create a snapshot of current interfaces settings, "
"which can be later committed (iface-commit) or "
"restored (iface-rollback)")},
{"desc", N_("Create a restore point for interfaces settings")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_begin[] = {
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceBegin(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
{
if (virInterfaceChangeBegin(ctl->conn, 0) < 0) {
vshError(ctl, "%s", _("Failed to begin network config change transaction"));
return false;
}
vshPrint(ctl, "%s", _("Network config change transaction started\n"));
return true;
}
/*
* "iface-commit" command
*/
static const vshCmdInfo info_interface_commit[] = {
{"help", N_("commit changes made since iface-begin and free restore point")},
{"desc", N_("commit changes and free restore point")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_commit[] = {
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceCommit(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
{
if (virInterfaceChangeCommit(ctl->conn, 0) < 0) {
vshError(ctl, "%s", _("Failed to commit network config change transaction"));
return false;
}
vshPrint(ctl, "%s", _("Network config change transaction committed\n"));
return true;
}
/*
* "iface-rollback" command
*/
static const vshCmdInfo info_interface_rollback[] = {
{"help", N_("rollback to previous saved configuration created via iface-begin")},
{"desc", N_("rollback to previous restore point")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_rollback[] = {
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceRollback(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
{
if (virInterfaceChangeRollback(ctl->conn, 0) < 0) {
vshError(ctl, "%s", _("Failed to rollback network config change transaction"));
return false;
}
vshPrint(ctl, "%s", _("Network config change transaction rolled back\n"));
return true;
}
/*
* "iface-bridge" command
*/
static const vshCmdInfo info_interface_bridge[] = {
{"help", N_("create a bridge device and attach an existing network device to it")},
{"desc", N_("bridge an existing network device")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_bridge[] = {
{"interface", VSH_OT_DATA, VSH_OFLAG_REQ, N_("existing interface name")},
{"bridge", VSH_OT_DATA, VSH_OFLAG_REQ, N_("new bridge device name")},
{"no-stp", VSH_OT_BOOL, 0, N_("do not enable STP for this bridge")},
{"delay", VSH_OT_INT, 0,
N_("number of seconds to squelch traffic on newly connected ports")},
{"no-start", VSH_OT_BOOL, 0, N_("don't start the bridge immediately")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceBridge(vshControl *ctl, const vshCmd *cmd)
{
bool ret = false;
virInterfacePtr if_handle = NULL, br_handle = NULL;
const char *if_name, *br_name;
char *if_type = NULL, *if2_name = NULL, *delay_str = NULL;
bool stp = false, nostart = false;
unsigned int delay = 0;
char *if_xml = NULL;
xmlChar *br_xml = NULL;
int br_xml_size;
xmlDocPtr xml_doc = NULL;
xmlXPathContextPtr ctxt = NULL;
xmlNodePtr top_node, br_node, if_node, cur;
/* Get a handle to the original device */
if (!(if_handle = vshCommandOptInterfaceBy(ctl, cmd, "interface",
&if_name, VSH_BYNAME))) {
goto cleanup;
}
/* Name for new bridge device */
if (vshCommandOptString(cmd, "bridge", &br_name) <= 0) {
vshError(ctl, "%s", _("Missing bridge device name in command"));
goto cleanup;
}
/* make sure "new" device doesn't already exist */
if ((br_handle = virInterfaceLookupByName(ctl->conn, br_name))) {
vshError(ctl, _("Network device %s already exists"), br_name);
goto cleanup;
}
/* use "no-stp" because we want "stp" to default true */
stp = !vshCommandOptBool(cmd, "no-stp");
if (vshCommandOptUInt(cmd, "delay", &delay) < 0) {
vshError(ctl, "%s", _("Unable to parse delay parameter"));
goto cleanup;
}
nostart = vshCommandOptBool(cmd, "no-start");
/* Get the original interface into an xmlDoc */
if (!(if_xml = virInterfaceGetXMLDesc(if_handle, VIR_INTERFACE_XML_INACTIVE)))
goto cleanup;
if (!(xml_doc = virXMLParseStringCtxt(if_xml,
_("(interface definition)"), &ctxt))) {
vshError(ctl, _("Failed to parse configuration of %s"), if_name);
goto cleanup;
}
top_node = ctxt->node;
/* Verify that the original device isn't already a bridge. */
if (!(if_type = virXMLPropString(top_node, "type"))) {
vshError(ctl, _("Existing device %s has no type"), if_name);
goto cleanup;
}
if (STREQ(if_type, "bridge")) {
vshError(ctl, _("Existing device %s is already a bridge"), if_name);
goto cleanup;
}
/* verify the name in the XML matches the device name */
if (!(if2_name = virXMLPropString(top_node, "name")) ||
STRNEQ(if2_name, if_name)) {
vshError(ctl, _("Interface name from config %s doesn't match given supplied name %s"),
if2_name, if_name);
goto cleanup;
}
/* Create a <bridge> node under <interface>. */
if (!(br_node = xmlNewChild(top_node, NULL, BAD_CAST "bridge", NULL))) {
vshError(ctl, "%s", _("Failed to create bridge node in xml document"));
goto cleanup;
}
/* Set stp and delay attributes in <bridge> according to the
* commandline options.
*/
if (!xmlSetProp(br_node, BAD_CAST "stp", BAD_CAST (stp ? "on" : "off"))) {
vshError(ctl, "%s", _("Failed to set stp attribute in xml document"));
goto cleanup;
}
if ((delay || stp) &&
((virAsprintf(&delay_str, "%d", delay) < 0) ||
!xmlSetProp(br_node, BAD_CAST "delay", BAD_CAST delay_str))) {
vshError(ctl, _("Failed to set bridge delay %d in xml document"), delay);
goto cleanup;
}
/* Change the type of the outer/master interface to "bridge" and the
* name to the provided bridge name.
*/
if (!xmlSetProp(top_node, BAD_CAST "type", BAD_CAST "bridge")) {
vshError(ctl, "%s", _("Failed to set bridge interface type to 'bridge' in xml document"));
goto cleanup;
}
if (!xmlSetProp(top_node, BAD_CAST "name", BAD_CAST br_name)) {
vshError(ctl, _("Failed to set master bridge interface name to '%s' in xml document"),
br_name);
goto cleanup;
}
/* Create an <interface> node under <bridge> that uses the
* original interface's type and name.
*/
if (!(if_node = xmlNewChild(br_node, NULL, BAD_CAST "interface", NULL))) {
vshError(ctl, "%s", _("Failed to create interface node under bridge node in xml document"));
goto cleanup;
}
/* set the type of the inner/slave interface to the original
* if_type, and the name to the original if_name.
*/
if (!xmlSetProp(if_node, BAD_CAST "type", BAD_CAST if_type)) {
vshError(ctl, _("Failed to set new slave interface type to '%s' in xml document"),
if_name);
goto cleanup;
}
if (!xmlSetProp(if_node, BAD_CAST "name", BAD_CAST if_name)) {
vshError(ctl, _("Failed to set new slave interface name to '%s' in xml document"),
br_name);
goto cleanup;
}
/* Cycle through all the nodes under the original <interface>,
* moving all <mac>, <bond> and <vlan> nodes down into the new
* lower level <interface>.
*/
cur = top_node->children;
while (cur) {
xmlNodePtr old = cur;
cur = cur->next;
if ((old->type == XML_ELEMENT_NODE) &&
(xmlStrEqual(old->name, BAD_CAST "mac") || /* ethernet stuff to move down */
xmlStrEqual(old->name, BAD_CAST "bond") || /* bond stuff to move down */
xmlStrEqual(old->name, BAD_CAST "vlan"))) { /* vlan stuff to move down */
xmlUnlinkNode(old);
if (!xmlAddChild(if_node, old)) {
vshError(ctl, _("Failed to move '%s' element in xml document"), old->name);
xmlFreeNode(old);
goto cleanup;
}
}
}
/* The document should now be fully converted; write it out to a string. */
xmlDocDumpMemory(xml_doc, &br_xml, &br_xml_size);
if (!br_xml || br_xml_size <= 0) {
vshError(ctl, _("Failed to format new xml document for bridge %s"), br_name);
goto cleanup;
}
/* br_xml is the new interface to define. It will automatically undefine the
* independent original interface.
*/
if (!(br_handle = virInterfaceDefineXML(ctl->conn, (char *) br_xml, 0))) {
vshError(ctl, _("Failed to define new bridge interface %s"),
br_name);
goto cleanup;
}
vshPrint(ctl, _("Created bridge %s with attached device %s\n"),
br_name, if_name);
/* start it up unless requested not to */
if (!nostart) {
if (virInterfaceCreate(br_handle, 0) < 0) {
vshError(ctl, _("Failed to start bridge interface %s"), br_name);
goto cleanup;
}
vshPrint(ctl, _("Bridge interface %s started\n"), br_name);
}
ret = true;
cleanup:
if (if_handle)
virInterfaceFree(if_handle);
if (br_handle)
virInterfaceFree(br_handle);
VIR_FREE(if_xml);
VIR_FREE(br_xml);
VIR_FREE(if_type);
VIR_FREE(if2_name);
VIR_FREE(delay_str);
xmlXPathFreeContext(ctxt);
xmlFreeDoc(xml_doc);
return ret;
}
/*
* "iface-unbridge" command
*/
static const vshCmdInfo info_interface_unbridge[] = {
{"help", N_("undefine a bridge device after detaching its slave device")},
{"desc", N_("unbridge a network device")},
{NULL, NULL}
};
static const vshCmdOptDef opts_interface_unbridge[] = {
{"bridge", VSH_OT_DATA, VSH_OFLAG_REQ, N_("current bridge device name")},
{"no-start", VSH_OT_BOOL, 0,
N_("don't start the un-slaved interface immediately (not recommended)")},
{NULL, 0, 0, NULL}
};
static bool
cmdInterfaceUnbridge(vshControl *ctl, const vshCmd *cmd)
{
bool ret = false;
virInterfacePtr if_handle = NULL, br_handle = NULL;
const char *br_name;
char *if_type = NULL, *if_name = NULL;
bool nostart = false;
char *br_xml = NULL;
xmlChar *if_xml = NULL;
int if_xml_size;
xmlDocPtr xml_doc = NULL;
xmlXPathContextPtr ctxt = NULL;
xmlNodePtr top_node, br_node, if_node, cur;
/* Get a handle to the original device */
if (!(br_handle = vshCommandOptInterfaceBy(ctl, cmd, "bridge",
&br_name, VSH_BYNAME))) {
goto cleanup;
}
nostart = vshCommandOptBool(cmd, "no-start");
/* Get the bridge xml into an xmlDoc */
if (!(br_xml = virInterfaceGetXMLDesc(br_handle, VIR_INTERFACE_XML_INACTIVE)))
goto cleanup;
if (!(xml_doc = virXMLParseStringCtxt(br_xml,
_("(bridge interface definition)"),
&ctxt))) {
vshError(ctl, _("Failed to parse configuration of %s"), br_name);
goto cleanup;
}
top_node = ctxt->node;
/* Verify that the device really is a bridge. */
if (!(if_type = virXMLPropString(top_node, "type"))) {
vshError(ctl, _("Existing device %s has no type"), br_name);
goto cleanup;
}
if (STRNEQ(if_type, "bridge")) {
vshError(ctl, _("Device %s is not a bridge"), br_name);
goto cleanup;
}
VIR_FREE(if_type);
/* verify the name in the XML matches the device name */
if (!(if_name = virXMLPropString(top_node, "name")) ||
STRNEQ(if_name, br_name)) {
vshError(ctl, _("Interface name from config %s doesn't match given supplied name %s"),
if_name, br_name);
goto cleanup;
}
VIR_FREE(if_name);
/* Find the <bridge> node under <interface>. */
if (!(br_node = virXPathNode("./bridge", ctxt))) {
vshError(ctl, "%s", _("No bridge node in xml document"));
goto cleanup;
}
if ((if_node = virXPathNode("./bridge/interface[2]", ctxt))) {
vshError(ctl, "%s", _("Multiple interfaces attached to bridge"));
goto cleanup;
}
if (!(if_node = virXPathNode("./bridge/interface", ctxt))) {
vshError(ctl, "%s", _("No interface attached to bridge"));
goto cleanup;
}
/* Change the type and name of the outer/master interface to
* the type/name of the attached slave interface.
*/
if (!(if_name = virXMLPropString(if_node, "name"))) {
vshError(ctl, _("Device attached to bridge %s has no name"), br_name);
goto cleanup;
}
if (!(if_type = virXMLPropString(if_node, "type"))) {
vshError(ctl, _("Attached device %s has no type"), if_name);
goto cleanup;
}
if (!xmlSetProp(top_node, BAD_CAST "type", BAD_CAST if_type)) {
vshError(ctl, _("Failed to set interface type to '%s' in xml document"),
if_type);
goto cleanup;
}
if (!xmlSetProp(top_node, BAD_CAST "name", BAD_CAST if_name)) {
vshError(ctl, _("Failed to set interface name to '%s' in xml document"),
if_name);
goto cleanup;
}
/* Cycle through all the nodes under the attached <interface>,
* moving all <mac>, <bond> and <vlan> nodes up into the toplevel
* <interface>.
*/
cur = if_node->children;
while (cur) {
xmlNodePtr old = cur;
cur = cur->next;
if ((old->type == XML_ELEMENT_NODE) &&
(xmlStrEqual(old->name, BAD_CAST "mac") || /* ethernet stuff to move down */
xmlStrEqual(old->name, BAD_CAST "bond") || /* bond stuff to move down */
xmlStrEqual(old->name, BAD_CAST "vlan"))) { /* vlan stuff to move down */
xmlUnlinkNode(old);
if (!xmlAddChild(top_node, old)) {
vshError(ctl, _("Failed to move '%s' element in xml document"), old->name);
xmlFreeNode(old);
goto cleanup;
}
}
}
/* The document should now be fully converted; write it out to a string. */
xmlDocDumpMemory(xml_doc, &if_xml, &if_xml_size);
if (!if_xml || if_xml_size <= 0) {
vshError(ctl, _("Failed to format new xml document for un-enslaved interface %s"),
if_name);
goto cleanup;
}
/* Destroy and Undefine the bridge device, since we otherwise
* can't safely define the unattached device.
*/
if (virInterfaceDestroy(br_handle, 0) < 0) {
vshError(ctl, _("Failed to destroy bridge interface %s"), br_name);
goto cleanup;
}
if (virInterfaceUndefine(br_handle) < 0) {
vshError(ctl, _("Failed to undefine bridge interface %s"), br_name);
goto cleanup;
}
/* if_xml is the new interface to define.
*/
if (!(if_handle = virInterfaceDefineXML(ctl->conn, (char *) if_xml, 0))) {
vshError(ctl, _("Failed to define new interface %s"), if_name);
goto cleanup;
}
vshPrint(ctl, _("Device %s un-attached from bridge %s\n"),
if_name, br_name);
/* unless requested otherwise, undefine the bridge device */
if (!nostart) {
if (virInterfaceCreate(if_handle, 0) < 0) {
vshError(ctl, _("Failed to start interface %s"), if_name);
goto cleanup;
}
vshPrint(ctl, _("Interface %s started\n"), if_name);
}
ret = true;
cleanup:
if (if_handle)
virInterfaceFree(if_handle);
if (br_handle)
virInterfaceFree(br_handle);
VIR_FREE(if_xml);
VIR_FREE(br_xml);
VIR_FREE(if_type);
VIR_FREE(if_name);
xmlXPathFreeContext(ctxt);
xmlFreeDoc(xml_doc);
return ret;
}
const vshCmdDef ifaceCmds[] = {
{"iface-begin", cmdInterfaceBegin, opts_interface_begin,
info_interface_begin, 0},
{"iface-bridge", cmdInterfaceBridge, opts_interface_bridge,
info_interface_bridge, 0},
{"iface-commit", cmdInterfaceCommit, opts_interface_commit,
info_interface_commit, 0},
{"iface-define", cmdInterfaceDefine, opts_interface_define,
info_interface_define, 0},
{"iface-destroy", cmdInterfaceDestroy, opts_interface_destroy,
info_interface_destroy, 0},
{"iface-dumpxml", cmdInterfaceDumpXML, opts_interface_dumpxml,
info_interface_dumpxml, 0},
{"iface-edit", cmdInterfaceEdit, opts_interface_edit,
info_interface_edit, 0},
{"iface-list", cmdInterfaceList, opts_interface_list,
info_interface_list, 0},
{"iface-mac", cmdInterfaceMAC, opts_interface_mac,
info_interface_mac, 0},
{"iface-name", cmdInterfaceName, opts_interface_name,
info_interface_name, 0},
{"iface-rollback", cmdInterfaceRollback, opts_interface_rollback,
info_interface_rollback, 0},
{"iface-start", cmdInterfaceStart, opts_interface_start,
info_interface_start, 0},
{"iface-unbridge", cmdInterfaceUnbridge, opts_interface_unbridge,
info_interface_unbridge, 0},
{"iface-undefine", cmdInterfaceUndefine, opts_interface_undefine,
info_interface_undefine, 0},
{NULL, NULL, NULL, NULL, 0}
};
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