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libvirt/tools/virsh-interface.c

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/*
* virsh-interface.c: Commands to manage host interface
*
* Copyright (C) 2005, 2007-2016 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/>.
*/
#define VIRSH_COMMON_OPT_INTERFACE(cflags) \
{.name = "interface", \
.type = VSH_OT_STRING, \
.positional = true, \
.required = true, \
.help = N_("interface name or MAC address"), \
.completer = virshInterfaceNameCompleter, \
.completer_flags = cflags, \
}
#include <config.h>
#include "virsh-interface.h"
#include "virsh-util.h"
#include <libxml/parser.h>
#include <libxml/xpath.h>
#include "internal.h"
#include "viralloc.h"
#include "virfile.h"
#include "virmacaddr.h"
#include "virxml.h"
#include "vsh-table.h"
virInterfacePtr
virshCommandOptInterfaceBy(vshControl *ctl, const vshCmd *cmd,
const char *optname,
const char **name, unsigned int flags)
{
virInterfacePtr iface = NULL;
const char *n = NULL;
bool is_mac = false;
virMacAddr dummy;
virshControl *priv = ctl->privData;
virCheckFlags(VIRSH_BYNAME | VIRSH_BYMAC, NULL);
if (!optname)
optname = "interface";
if (vshCommandOptStringReq(ctl, 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;
if (virMacAddrParse(n, &dummy) == 0)
is_mac = true;
/* try it by NAME */
if (!is_mac && (flags & VIRSH_BYNAME)) {
vshDebug(ctl, VSH_ERR_DEBUG, "%s: <%s> trying as interface NAME\n",
cmd->def->name, optname);
iface = virInterfaceLookupByName(priv->conn, n);
/* try it by MAC */
} else if (is_mac && (flags & VIRSH_BYMAC)) {
vshDebug(ctl, VSH_ERR_DEBUG, "%s: <%s> trying as interface MAC\n",
cmd->def->name, optname);
iface = virInterfaceLookupByMACString(priv->conn, n);
}
if (!iface)
vshError(ctl, _("failed to get interface '%1$s'"), n);
return iface;
}
/*
* "iface-edit" command
*/
static const vshCmdInfo info_interface_edit = {
.help = N_("edit XML configuration for a physical host interface"),
.desc = N_("Edit the XML configuration for a physical host interface."),
};
static const vshCmdOptDef opts_interface_edit[] = {
VIRSH_COMMON_OPT_INTERFACE(0),
{.name = NULL}
};
static bool
cmdInterfaceEdit(vshControl *ctl, const vshCmd *cmd)
{
bool ret = false;
g_autoptr(virshInterface) iface = NULL;
g_autoptr(virshInterface) iface_edited = NULL;
unsigned int flags = VIR_INTERFACE_XML_INACTIVE;
virshControl *priv = ctl->privData;
iface = virshCommandOptInterface(ctl, cmd, NULL);
if (iface == NULL)
goto cleanup;
#define EDIT_GET_XML virInterfaceGetXMLDesc(iface, flags)
#define EDIT_NOT_CHANGED \
do { \
vshPrintExtra(ctl, _("Interface %1$s XML configuration not changed.\n"), \
virInterfaceGetName(iface)); \
ret = true; \
goto edit_cleanup; \
} while (0)
#define EDIT_DEFINE \
(iface_edited = virInterfaceDefineXML(priv->conn, doc_edited, 0))
#include "virsh-edit.c"
vshPrintExtra(ctl, _("Interface %1$s XML configuration edited.\n"),
virInterfaceGetName(iface_edited));
ret = true;
cleanup:
return ret;
}
static int
virshInterfaceSorter(const void *a,
const void *b,
void *opaque G_GNUC_UNUSED)
{
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 virshInterfaceList {
virInterfacePtr *ifaces;
size_t nifaces;
};
static void
virshInterfaceListFree(struct virshInterfaceList *list)
{
size_t i;
if (list && list->ifaces) {
for (i = 0; i < list->nifaces; i++) {
virshInterfaceFree(list->ifaces[i]);
}
g_free(list->ifaces);
}
g_free(list);
}
static struct virshInterfaceList *
virshInterfaceListCollect(vshControl *ctl,
unsigned int flags)
{
struct virshInterfaceList *list = g_new0(struct virshInterfaceList, 1);
size_t 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;
virshControl *priv = ctl->privData;
/* try the list with flags support (0.10.2 and later) */
if ((ret = virConnectListAllInterfaces(priv->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(priv->conn);
if (nActiveIfaces < 0) {
vshError(ctl, "%s", _("Failed to list active interfaces"));
goto cleanup;
}
if (nActiveIfaces) {
activeNames = g_new0(char *, nActiveIfaces);
if ((nActiveIfaces = virConnectListInterfaces(priv->conn, activeNames,
nActiveIfaces)) < 0) {
vshError(ctl, "%s", _("Failed to list active interfaces"));
goto cleanup;
}
}
}
if (flags & VIR_CONNECT_LIST_INTERFACES_INACTIVE) {
nInactiveIfaces = virConnectNumOfDefinedInterfaces(priv->conn);
if (nInactiveIfaces < 0) {
vshError(ctl, "%s", _("Failed to list inactive interfaces"));
goto cleanup;
}
if (nInactiveIfaces) {
inactiveNames = g_new0(char *, nInactiveIfaces);
if ((nInactiveIfaces =
virConnectListDefinedInterfaces(priv->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 = g_new0(virInterfacePtr, nAllIfaces);
list->nifaces = 0;
/* get active interfaces */
for (i = 0; i < nActiveIfaces; i++) {
if (!(iface = virInterfaceLookupByName(priv->conn, activeNames[i]))) {
vshResetLibvirtError();
continue;
}
list->ifaces[list->nifaces++] = iface;
}
/* get inactive interfaces */
for (i = 0; i < nInactiveIfaces; i++) {
if (!(iface = virInterfaceLookupByName(priv->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) {
g_qsort_with_data(list->ifaces, list->nifaces,
sizeof(*list->ifaces), virshInterfaceSorter, NULL);
}
/* truncate the list if filter simulation deleted entries */
if (deleted)
VIR_SHRINK_N(list->ifaces, list->nifaces, deleted);
success = true;
cleanup:
for (i = 0; nActiveIfaces != -1 && i < nActiveIfaces; i++)
VIR_FREE(activeNames[i]);
for (i = 0; nInactiveIfaces != -1 && i < nInactiveIfaces; i++)
VIR_FREE(inactiveNames[i]);
VIR_FREE(activeNames);
VIR_FREE(inactiveNames);
if (!success) {
g_clear_pointer(&list, virshInterfaceListFree);
}
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."),
};
static const vshCmdOptDef opts_interface_list[] = {
{.name = "inactive",
.type = VSH_OT_BOOL,
.help = N_("list inactive interfaces")
},
{.name = "all",
.type = VSH_OT_BOOL,
.help = N_("list inactive & active interfaces")
},
{.name = NULL}
};
static bool
cmdInterfaceList(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
{
bool inactive = vshCommandOptBool(cmd, "inactive");
bool all = vshCommandOptBool(cmd, "all");
unsigned int flags = VIR_CONNECT_LIST_INTERFACES_ACTIVE;
struct virshInterfaceList *list = NULL;
size_t i;
bool ret = false;
g_autoptr(vshTable) table = NULL;
VSH_EXCLUSIVE_OPTIONS_VAR(all, inactive);
if (inactive)
flags = VIR_CONNECT_LIST_INTERFACES_INACTIVE;
if (all)
flags = VIR_CONNECT_LIST_INTERFACES_INACTIVE |
VIR_CONNECT_LIST_INTERFACES_ACTIVE;
if (!(list = virshInterfaceListCollect(ctl, flags)))
return false;
table = vshTableNew(_("Name"), _("State"), _("MAC Address"), NULL);
if (!table)
goto cleanup;
for (i = 0; i < list->nifaces; i++) {
virInterfacePtr iface = list->ifaces[i];
if (vshTableRowAppend(table,
virInterfaceGetName(iface),
virInterfaceIsActive(iface) ? _("active")
: _("inactive"),
virInterfaceGetMACString(iface),
NULL) < 0)
goto cleanup;
}
vshTablePrintToStdout(table, ctl);
ret = true;
cleanup:
virshInterfaceListFree(list);
return ret;
}
/*
* "iface-name" command
*/
static const vshCmdInfo info_interface_name = {
.help = N_("convert an interface MAC address to interface name"),
.desc = "",
};
static const vshCmdOptDef opts_interface_name[] = {
{.name = "interface",
.type = VSH_OT_STRING,
.positional = true,
.required = true,
.completer = virshInterfaceMacCompleter,
.help = N_("interface mac")
},
{.name = NULL}
};
static bool
cmdInterfaceName(vshControl *ctl, const vshCmd *cmd)
{
g_autoptr(virshInterface) iface = NULL;
if (!(iface = virshCommandOptInterfaceBy(ctl, cmd, NULL, NULL,
VIRSH_BYMAC)))
return false;
vshPrint(ctl, "%s\n", virInterfaceGetName(iface));
return true;
}
/*
* "iface-mac" command
*/
static const vshCmdInfo info_interface_mac = {
.help = N_("convert an interface name to interface MAC address"),
.desc = "",
};
static const vshCmdOptDef opts_interface_mac[] = {
{.name = "interface",
.type = VSH_OT_STRING,
.positional = true,
.required = true,
.completer = virshInterfaceNameCompleter,
.help = N_("interface name")
},
{.name = NULL}
};
static bool
cmdInterfaceMAC(vshControl *ctl, const vshCmd *cmd)
{
g_autoptr(virshInterface) iface = NULL;
if (!(iface = virshCommandOptInterfaceBy(ctl, cmd, NULL, NULL,
VIRSH_BYNAME)))
return false;
vshPrint(ctl, "%s\n", virInterfaceGetMACString(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."),
};
static const vshCmdOptDef opts_interface_dumpxml[] = {
VIRSH_COMMON_OPT_INTERFACE(0),
{.name = "inactive",
.type = VSH_OT_BOOL,
.help = N_("show inactive defined XML")
},
{.name = "xpath",
.type = VSH_OT_STRING,
.flags = VSH_OFLAG_REQ_OPT,
.completer = virshCompleteEmpty,
.help = N_("xpath expression to filter the XML document")
},
{.name = "wrap",
.type = VSH_OT_BOOL,
.help = N_("wrap xpath results in an common root element"),
},
{.name = NULL}
};
static bool
cmdInterfaceDumpXML(vshControl *ctl, const vshCmd *cmd)
{
g_autoptr(virshInterface) iface = NULL;
g_autofree char *xml = NULL;
bool wrap = vshCommandOptBool(cmd, "wrap");
const char *xpath = NULL;
unsigned int flags = 0;
if (vshCommandOptBool(cmd, "inactive"))
flags |= VIR_INTERFACE_XML_INACTIVE;
if (!(iface = virshCommandOptInterface(ctl, cmd, NULL)))
return false;
if (vshCommandOptStringQuiet(ctl, cmd, "xpath", &xpath) < 0)
return false;
if (!(xml = virInterfaceGetXMLDesc(iface, flags)))
return false;
return virshDumpXML(ctl, xml, "interface", xpath, wrap);
}
/*
* "iface-define" command
*/
static const vshCmdInfo info_interface_define = {
.help = N_("define an inactive persistent physical host interface or "
"modify an existing persistent one from an XML file"),
.desc = N_("Define or modify a persistent physical host interface."),
};
static const vshCmdOptDef opts_interface_define[] = {
VIRSH_COMMON_OPT_FILE(N_("file containing an XML interface description")),
{.name = "validate",
.type = VSH_OT_BOOL,
.help = N_("validate the XML against the schema")
},
{.name = NULL}
};
static bool
cmdInterfaceDefine(vshControl *ctl, const vshCmd *cmd)
{
g_autoptr(virshInterface) iface = NULL;
const char *from = NULL;
g_autofree char *buffer = NULL;
unsigned int flags = 0;
virshControl *priv = ctl->privData;
if (vshCommandOptStringReq(ctl, cmd, "file", &from) < 0)
return false;
if (vshCommandOptBool(cmd, "validate"))
flags |= VIR_INTERFACE_DEFINE_VALIDATE;
if (virFileReadAll(from, VSH_MAX_XML_FILE, &buffer) < 0)
return false;
if (!(iface = virInterfaceDefineXML(priv->conn, buffer, flags))) {
vshError(ctl, _("Failed to define interface from %1$s"), from);
return false;
}
vshPrintExtra(ctl, _("Interface %1$s defined from %2$s\n"),
virInterfaceGetName(iface), from);
return true;
}
/*
* "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."),
};
static const vshCmdOptDef opts_interface_undefine[] = {
VIRSH_COMMON_OPT_INTERFACE(0),
{.name = NULL}
};
static bool
cmdInterfaceUndefine(vshControl *ctl, const vshCmd *cmd)
{
g_autoptr(virshInterface) iface = NULL;
const char *name;
if (!(iface = virshCommandOptInterface(ctl, cmd, &name)))
return false;
if (virInterfaceUndefine(iface) < 0) {
vshError(ctl, _("Failed to undefine interface %1$s"), name);
return false;
}
vshPrintExtra(ctl, _("Interface %1$s undefined\n"), name);
return true;
}
/*
* "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."),
};
static const vshCmdOptDef opts_interface_start[] = {
VIRSH_COMMON_OPT_INTERFACE(VIR_CONNECT_LIST_INTERFACES_INACTIVE),
{.name = NULL}
};
static bool
cmdInterfaceStart(vshControl *ctl, const vshCmd *cmd)
{
g_autoptr(virshInterface) iface = NULL;
const char *name;
if (!(iface = virshCommandOptInterface(ctl, cmd, &name)))
return false;
if (virInterfaceCreate(iface, 0) < 0) {
vshError(ctl, _("Failed to start interface %1$s"), name);
return false;
}
vshPrintExtra(ctl, _("Interface %1$s started\n"), name);
return true;
}
/*
* "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."),
};
static const vshCmdOptDef opts_interface_destroy[] = {
VIRSH_COMMON_OPT_INTERFACE(VIR_CONNECT_LIST_INTERFACES_ACTIVE),
{.name = NULL}
};
static bool
cmdInterfaceDestroy(vshControl *ctl, const vshCmd *cmd)
{
g_autoptr(virshInterface) iface = NULL;
const char *name;
if (!(iface = virshCommandOptInterface(ctl, cmd, &name)))
return false;
if (virInterfaceDestroy(iface, 0) < 0) {
vshError(ctl, _("Failed to destroy interface %1$s"), name);
return false;
}
vshPrintExtra(ctl, _("Interface %1$s destroyed\n"), name);
return false;
}
/*
* "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"),
};
static const vshCmdOptDef opts_interface_begin[] = {
{.name = NULL}
};
static bool
cmdInterfaceBegin(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
{
virshControl *priv = ctl->privData;
if (virInterfaceChangeBegin(priv->conn, 0) < 0) {
vshError(ctl, "%s", _("Failed to begin network config change transaction"));
return false;
}
vshPrintExtra(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"),
};
static const vshCmdOptDef opts_interface_commit[] = {
{.name = NULL}
};
static bool
cmdInterfaceCommit(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
{
virshControl *priv = ctl->privData;
if (virInterfaceChangeCommit(priv->conn, 0) < 0) {
vshError(ctl, "%s", _("Failed to commit network config change transaction"));
return false;
}
vshPrintExtra(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"),
};
static const vshCmdOptDef opts_interface_rollback[] = {
{.name = NULL}
};
static bool
cmdInterfaceRollback(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
{
virshControl *priv = ctl->privData;
if (virInterfaceChangeRollback(priv->conn, 0) < 0) {
vshError(ctl, "%s", _("Failed to rollback network config change transaction"));
return false;
}
vshPrintExtra(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"),
};
static const vshCmdOptDef opts_interface_bridge[] = {
{.name = "interface",
.type = VSH_OT_STRING,
.positional = true,
.required = true,
.completer = virshInterfaceNameCompleter,
.help = N_("existing interface name")
},
{.name = "bridge",
.type = VSH_OT_STRING,
.positional = true,
.required = true,
.help = N_("new bridge device name")
},
{.name = "no-stp",
.type = VSH_OT_BOOL,
.help = N_("do not enable STP for this bridge")
},
{.name = "delay",
.type = VSH_OT_INT,
.help = N_("number of seconds to squelch traffic on newly connected ports")
},
{.name = "no-start",
.type = VSH_OT_BOOL,
.help = N_("don't start the bridge immediately")
},
{.name = NULL}
};
static bool
cmdInterfaceBridge(vshControl *ctl, const vshCmd *cmd)
{
bool ret = false;
g_autoptr(virshInterface) if_handle = NULL;
g_autoptr(virshInterface) 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;
g_autoptr(xmlDoc) xml_doc = NULL;
g_autoptr(xmlXPathContext) ctxt = NULL;
xmlNodePtr top_node, br_node, if_node, cur;
virshControl *priv = ctl->privData;
/* Get a handle to the original device */
if (!(if_handle = virshCommandOptInterfaceBy(ctl, cmd, "interface",
&if_name, VIRSH_BYNAME))) {
goto cleanup;
}
/* Name for new bridge device */
if (vshCommandOptStringReq(ctl, cmd, "bridge", &br_name) < 0)
goto cleanup;
/* make sure "new" device doesn't already exist */
if ((br_handle = virInterfaceLookupByName(priv->conn, br_name))) {
vshError(ctl, _("Network device %1$s already exists"), br_name);
goto cleanup;
}
/* use "no-stp" because we want "stp" to default true */
stp = !vshCommandOptBool(cmd, "no-stp");
if (vshCommandOptUInt(ctl, cmd, "delay", &delay) < 0)
goto cleanup;
nostart = vshCommandOptBool(cmd, "no-start");
/* Get the original interface into an xmlDoc */
if (!(if_xml = virInterfaceGetXMLDesc(if_handle, VIR_INTERFACE_XML_INACTIVE)))
goto cleanup;
if (!(xml_doc = virXMLParseStringCtxt(if_xml,
_("(interface definition)"), &ctxt))) {
vshError(ctl, _("Failed to parse configuration of %1$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 %1$s has no type"), if_name);
goto cleanup;
}
if (STREQ(if_type, "bridge")) {
vshError(ctl, _("Existing device %1$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 %1$s doesn't match given supplied name %2$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 (stp) {
delay_str = g_strdup_printf("%d", delay);
if (!xmlSetProp(br_node, BAD_CAST "delay", BAD_CAST delay_str)) {
vshError(ctl, _("Failed to set bridge delay %1$d in xml document"), delay);
goto cleanup;
}
}
/* Change the type of the outer/master interface to "bridge" and the
* name to the provided bridge name.
*/
if (!xmlSetProp(top_node, BAD_CAST "type", BAD_CAST "bridge")) {
vshError(ctl, "%s", _("Failed to set bridge interface type to 'bridge' in xml document"));
goto cleanup;
}
if (!xmlSetProp(top_node, BAD_CAST "name", BAD_CAST br_name)) {
vshError(ctl, _("Failed to set master bridge interface name to '%1$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 attached 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 attached interface type to '%1$s' in xml document"),
if_type);
goto cleanup;
}
if (!xmlSetProp(if_node, BAD_CAST "name", BAD_CAST if_name)) {
vshError(ctl, _("Failed to set new attached interface name to '%1$s' in xml document"),
if_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) &&
(virXMLNodeNameEqual(old, "mac") || /* ethernet stuff to move down */
virXMLNodeNameEqual(old, "bond") || /* bond stuff to move down */
virXMLNodeNameEqual(old, "vlan"))) { /* vlan stuff to move down */
xmlUnlinkNode(old);
if (!xmlAddChild(if_node, old)) {
vshError(ctl, _("Failed to move '%1$s' element in xml document"), old->name);
xmlFreeNode(old);
goto cleanup;
}
}
}
/* The document should now be fully converted; write it out to a string. */
xmlDocDumpMemory(xml_doc, &br_xml, &br_xml_size);
if (!br_xml || br_xml_size <= 0) {
vshError(ctl, _("Failed to format new xml document for bridge %1$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(priv->conn, (char *) br_xml, 0))) {
vshError(ctl, _("Failed to define new bridge interface %1$s"),
br_name);
goto cleanup;
}
vshPrintExtra(ctl, _("Created bridge %1$s with attached device %2$s\n"),
br_name, if_name);
/* start it up unless requested not to */
if (!nostart) {
if (virInterfaceCreate(br_handle, 0) < 0) {
vshError(ctl, _("Failed to start bridge interface %1$s"), br_name);
goto cleanup;
}
vshPrintExtra(ctl, _("Bridge interface %1$s started\n"), br_name);
}
ret = true;
cleanup:
VIR_FREE(if_xml);
VIR_FREE(br_xml);
VIR_FREE(if_type);
VIR_FREE(if2_name);
VIR_FREE(delay_str);
return ret;
}
/*
* "iface-unbridge" command
*/
static const vshCmdInfo info_interface_unbridge = {
.help = N_("undefine a bridge device after detaching its device(s)"),
.desc = N_("unbridge a network device"),
};
static const vshCmdOptDef opts_interface_unbridge[] = {
{.name = "bridge",
.type = VSH_OT_STRING,
.positional = true,
.required = true,
.help = N_("current bridge device name")
},
{.name = "no-start",
.type = VSH_OT_BOOL,
.help = N_("don't start the detached interface immediately (not recommended)")
},
{.name = NULL}
};
static bool
cmdInterfaceUnbridge(vshControl *ctl, const vshCmd *cmd)
{
bool ret = false;
g_autoptr(virshInterface) if_handle = NULL;
g_autoptr(virshInterface) br_handle = NULL;
const char *br_name;
char *if_type = NULL, *if_name = NULL;
bool nostart = false;
char *br_xml = NULL;
xmlChar *if_xml = NULL;
int if_xml_size;
g_autoptr(xmlDoc) xml_doc = NULL;
g_autoptr(xmlXPathContext) ctxt = NULL;
xmlNodePtr top_node, if_node, cur;
virshControl *priv = ctl->privData;
/* Get a handle to the original device */
if (!(br_handle = virshCommandOptInterfaceBy(ctl, cmd, "bridge",
&br_name, VIRSH_BYNAME))) {
goto cleanup;
}
nostart = vshCommandOptBool(cmd, "no-start");
/* Get the bridge xml into an xmlDoc */
if (!(br_xml = virInterfaceGetXMLDesc(br_handle, VIR_INTERFACE_XML_INACTIVE)))
goto cleanup;
if (!(xml_doc = virXMLParseStringCtxt(br_xml,
_("(bridge interface definition)"),
&ctxt))) {
vshError(ctl, _("Failed to parse configuration of %1$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 %1$s has no type"), br_name);
goto cleanup;
}
if (STRNEQ(if_type, "bridge")) {
vshError(ctl, _("Device %1$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 %1$s doesn't match given supplied name %2$s"),
if_name, br_name);
goto cleanup;
}
VIR_FREE(if_name);
/* Find the <bridge> node under <interface>. */
if (virXPathNode("./bridge", ctxt) == NULL) {
vshError(ctl, "%s", _("No bridge node in xml document"));
goto cleanup;
}
if (virXPathNode("./bridge/interface[2]", ctxt) != NULL) {
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 bridge interface to
* the type/name of the attached interface.
*/
if (!(if_name = virXMLPropString(if_node, "name"))) {
vshError(ctl, _("Device attached to bridge %1$s has no name"), br_name);
goto cleanup;
}
if (!(if_type = virXMLPropString(if_node, "type"))) {
vshError(ctl, _("Attached device %1$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 '%1$s' in xml document"),
if_type);
goto cleanup;
}
if (!xmlSetProp(top_node, BAD_CAST "name", BAD_CAST if_name)) {
vshError(ctl, _("Failed to set interface name to '%1$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) &&
(virXMLNodeNameEqual(old, "mac") || /* ethernet stuff to move down */
virXMLNodeNameEqual(old, "bond") || /* bond stuff to move down */
virXMLNodeNameEqual(old, "vlan"))) { /* vlan stuff to move down */
xmlUnlinkNode(old);
if (!xmlAddChild(top_node, old)) {
vshError(ctl, _("Failed to move '%1$s' element in xml document"), old->name);
xmlFreeNode(old);
goto cleanup;
}
}
}
/* The document should now be fully converted; write it out to a string. */
xmlDocDumpMemory(xml_doc, &if_xml, &if_xml_size);
if (!if_xml || if_xml_size <= 0) {
vshError(ctl, _("Failed to format new xml document for detached interface %1$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 %1$s"), br_name);
goto cleanup;
}
if (virInterfaceUndefine(br_handle) < 0) {
vshError(ctl, _("Failed to undefine bridge interface %1$s"), br_name);
goto cleanup;
}
/* if_xml is the new interface to define.
*/
if (!(if_handle = virInterfaceDefineXML(priv->conn, (char *) if_xml, 0))) {
vshError(ctl, _("Failed to define new interface %1$s"), if_name);
goto cleanup;
}
vshPrintExtra(ctl, _("Device %1$s un-attached from bridge %2$s\n"),
if_name, br_name);
/* unless requested otherwise, undefine the bridge device */
if (!nostart) {
if (virInterfaceCreate(if_handle, 0) < 0) {
vshError(ctl, _("Failed to start interface %1$s"), if_name);
goto cleanup;
}
vshPrintExtra(ctl, _("Interface %1$s started\n"), if_name);
}
ret = true;
cleanup:
VIR_FREE(if_xml);
VIR_FREE(br_xml);
VIR_FREE(if_type);
VIR_FREE(if_name);
return ret;
}
const vshCmdDef ifaceCmds[] = {
{.name = "iface-begin",
.handler = cmdInterfaceBegin,
.opts = opts_interface_begin,
.info = &info_interface_begin,
.flags = 0
},
{.name = "iface-bridge",
.handler = cmdInterfaceBridge,
.opts = opts_interface_bridge,
.info = &info_interface_bridge,
.flags = 0
},
{.name = "iface-commit",
.handler = cmdInterfaceCommit,
.opts = opts_interface_commit,
.info = &info_interface_commit,
.flags = 0
},
{.name = "iface-define",
.handler = cmdInterfaceDefine,
.opts = opts_interface_define,
.info = &info_interface_define,
.flags = 0
},
{.name = "iface-destroy",
.handler = cmdInterfaceDestroy,
.opts = opts_interface_destroy,
.info = &info_interface_destroy,
.flags = 0
},
{.name = "iface-dumpxml",
.handler = cmdInterfaceDumpXML,
.opts = opts_interface_dumpxml,
.info = &info_interface_dumpxml,
.flags = 0
},
{.name = "iface-edit",
.handler = cmdInterfaceEdit,
.opts = opts_interface_edit,
.info = &info_interface_edit,
.flags = 0
},
{.name = "iface-list",
.handler = cmdInterfaceList,
.opts = opts_interface_list,
.info = &info_interface_list,
.flags = 0
},
{.name = "iface-mac",
.handler = cmdInterfaceMAC,
.opts = opts_interface_mac,
.info = &info_interface_mac,
.flags = 0
},
{.name = "iface-name",
.handler = cmdInterfaceName,
.opts = opts_interface_name,
.info = &info_interface_name,
.flags = 0
},
{.name = "iface-rollback",
.handler = cmdInterfaceRollback,
.opts = opts_interface_rollback,
.info = &info_interface_rollback,
.flags = 0
},
{.name = "iface-start",
.handler = cmdInterfaceStart,
.opts = opts_interface_start,
.info = &info_interface_start,
.flags = 0
},
{.name = "iface-unbridge",
.handler = cmdInterfaceUnbridge,
.opts = opts_interface_unbridge,
.info = &info_interface_unbridge,
.flags = 0
},
{.name = "iface-undefine",
.handler = cmdInterfaceUndefine,
.opts = opts_interface_undefine,
.info = &info_interface_undefine,
.flags = 0
},
{.name = NULL}
};
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