libvirt/tools/virsh-nodedev.c
Eric Blake ea3cf921f2 virsh: split out virsh-nodedev.c
Another worthwhile split, needed one more public function.

* tools/virsh-nodedev.h: New file.
* tools/Makefile.am (virsh_SOURCES): Build it.
* tools/virsh-nodedev.c: Use new header.
* tools/virsh.c: Likewise.
(vshTreePrint): Export.
* tools/virsh.h (vshTreePrint): Declare.
2012-08-21 00:05:53 -06:00

417 lines
12 KiB
C

/*
* virsh-nodedev.c: Commands in node device group
*
* 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-nodedev.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"
/*
* "nodedev-create" command
*/
static const vshCmdInfo info_node_device_create[] = {
{"help", N_("create a device defined "
"by an XML file on the node")},
{"desc", N_("Create a device on the node. Note that this "
"command creates devices on the physical host "
"that can then be assigned to a virtual machine.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_node_device_create[] = {
{"file", VSH_OT_DATA, VSH_OFLAG_REQ,
N_("file containing an XML description of the device")},
{NULL, 0, 0, NULL}
};
static bool
cmdNodeDeviceCreate(vshControl *ctl, const vshCmd *cmd)
{
virNodeDevicePtr dev = NULL;
const char *from = NULL;
bool ret = true;
char *buffer;
if (!vshConnectionUsability(ctl, ctl->conn))
return false;
if (vshCommandOptString(cmd, "file", &from) <= 0)
return false;
if (virFileReadAll(from, VSH_MAX_XML_FILE, &buffer) < 0)
return false;
dev = virNodeDeviceCreateXML(ctl->conn, buffer, 0);
VIR_FREE(buffer);
if (dev != NULL) {
vshPrint(ctl, _("Node device %s created from %s\n"),
virNodeDeviceGetName(dev), from);
virNodeDeviceFree(dev);
} else {
vshError(ctl, _("Failed to create node device from %s"), from);
ret = false;
}
return ret;
}
/*
* "nodedev-destroy" command
*/
static const vshCmdInfo info_node_device_destroy[] = {
{"help", N_("destroy (stop) a device on the node")},
{"desc", N_("Destroy a device on the node. Note that this "
"command destroys devices on the physical host")},
{NULL, NULL}
};
static const vshCmdOptDef opts_node_device_destroy[] = {
{"name", VSH_OT_DATA, VSH_OFLAG_REQ,
N_("name of the device to be destroyed")},
{NULL, 0, 0, NULL}
};
static bool
cmdNodeDeviceDestroy(vshControl *ctl, const vshCmd *cmd)
{
virNodeDevicePtr dev = NULL;
bool ret = true;
const char *name = NULL;
if (!vshConnectionUsability(ctl, ctl->conn)) {
return false;
}
if (vshCommandOptString(cmd, "name", &name) <= 0)
return false;
dev = virNodeDeviceLookupByName(ctl->conn, name);
if (virNodeDeviceDestroy(dev) == 0) {
vshPrint(ctl, _("Destroyed node device '%s'\n"), name);
} else {
vshError(ctl, _("Failed to destroy node device '%s'"), name);
ret = false;
}
virNodeDeviceFree(dev);
return ret;
}
struct vshNodeList {
char **names;
char **parents;
};
static const char *
vshNodeListLookup(int devid, bool parent, void *opaque)
{
struct vshNodeList *arrays = opaque;
if (parent)
return arrays->parents[devid];
return arrays->names[devid];
}
/*
* "nodedev-list" command
*/
static const vshCmdInfo info_node_list_devices[] = {
{"help", N_("enumerate devices on this host")},
{"desc", ""},
{NULL, NULL}
};
static const vshCmdOptDef opts_node_list_devices[] = {
{"tree", VSH_OT_BOOL, 0, N_("list devices in a tree")},
{"cap", VSH_OT_STRING, VSH_OFLAG_NONE, N_("capability name")},
{NULL, 0, 0, NULL}
};
static bool
cmdNodeListDevices(vshControl *ctl, const vshCmd *cmd ATTRIBUTE_UNUSED)
{
const char *cap = NULL;
char **devices;
int num_devices, i;
bool tree = vshCommandOptBool(cmd, "tree");
bool ret = true;
if (!vshConnectionUsability(ctl, ctl->conn))
return false;
if (vshCommandOptString(cmd, "cap", &cap) <= 0)
cap = NULL;
num_devices = virNodeNumOfDevices(ctl->conn, cap, 0);
if (num_devices < 0) {
vshError(ctl, "%s", _("Failed to count node devices"));
return false;
} else if (num_devices == 0) {
return true;
}
devices = vshMalloc(ctl, sizeof(char *) * num_devices);
num_devices =
virNodeListDevices(ctl->conn, cap, devices, num_devices, 0);
if (num_devices < 0) {
vshError(ctl, "%s", _("Failed to list node devices"));
VIR_FREE(devices);
return false;
}
qsort(&devices[0], num_devices, sizeof(char*), vshNameSorter);
if (tree) {
char **parents = vshMalloc(ctl, sizeof(char *) * num_devices);
struct vshNodeList arrays = { devices, parents };
for (i = 0; i < num_devices; i++) {
virNodeDevicePtr dev = virNodeDeviceLookupByName(ctl->conn, devices[i]);
if (dev && STRNEQ(devices[i], "computer")) {
const char *parent = virNodeDeviceGetParent(dev);
parents[i] = parent ? vshStrdup(ctl, parent) : NULL;
} else {
parents[i] = NULL;
}
virNodeDeviceFree(dev);
}
for (i = 0 ; i < num_devices ; i++) {
if (parents[i] == NULL &&
vshTreePrint(ctl, vshNodeListLookup, &arrays, num_devices,
i) < 0)
ret = false;
}
for (i = 0 ; i < num_devices ; i++) {
VIR_FREE(devices[i]);
VIR_FREE(parents[i]);
}
VIR_FREE(parents);
} else {
for (i = 0; i < num_devices; i++) {
vshPrint(ctl, "%s\n", devices[i]);
VIR_FREE(devices[i]);
}
}
VIR_FREE(devices);
return ret;
}
/*
* "nodedev-dumpxml" command
*/
static const vshCmdInfo info_node_device_dumpxml[] = {
{"help", N_("node device details in XML")},
{"desc", N_("Output the node device details as an XML dump to stdout.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_node_device_dumpxml[] = {
{"device", VSH_OT_DATA, VSH_OFLAG_REQ, N_("device key")},
{NULL, 0, 0, NULL}
};
static bool
cmdNodeDeviceDumpXML(vshControl *ctl, const vshCmd *cmd)
{
const char *name = NULL;
virNodeDevicePtr device;
char *xml;
if (!vshConnectionUsability(ctl, ctl->conn))
return false;
if (vshCommandOptString(cmd, "device", &name) <= 0)
return false;
if (!(device = virNodeDeviceLookupByName(ctl->conn, name))) {
vshError(ctl, "%s '%s'", _("Could not find matching device"), name);
return false;
}
xml = virNodeDeviceGetXMLDesc(device, 0);
if (!xml) {
virNodeDeviceFree(device);
return false;
}
vshPrint(ctl, "%s\n", xml);
VIR_FREE(xml);
virNodeDeviceFree(device);
return true;
}
/*
* "nodedev-detach" command
*/
static const vshCmdInfo info_node_device_detach[] = {
{"help", N_("detach node device from its device driver")},
{"desc", N_("Detach node device from its device driver before assigning to a domain.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_node_device_detach[] = {
{"device", VSH_OT_DATA, VSH_OFLAG_REQ, N_("device key")},
{NULL, 0, 0, NULL}
};
static bool
cmdNodeDeviceDetach(vshControl *ctl, const vshCmd *cmd)
{
const char *name = NULL;
virNodeDevicePtr device;
bool ret = true;
if (!vshConnectionUsability(ctl, ctl->conn))
return false;
if (vshCommandOptString(cmd, "device", &name) <= 0)
return false;
if (!(device = virNodeDeviceLookupByName(ctl->conn, name))) {
vshError(ctl, "%s '%s'", _("Could not find matching device"), name);
return false;
}
/* Yes, our public API is misspelled. At least virsh can accept
* either spelling. */
if (virNodeDeviceDettach(device) == 0) {
vshPrint(ctl, _("Device %s detached\n"), name);
} else {
vshError(ctl, _("Failed to detach device %s"), name);
ret = false;
}
virNodeDeviceFree(device);
return ret;
}
/*
* "nodedev-reattach" command
*/
static const vshCmdInfo info_node_device_reattach[] = {
{"help", N_("reattach node device to its device driver")},
{"desc", N_("Reattach node device to its device driver once released by the domain.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_node_device_reattach[] = {
{"device", VSH_OT_DATA, VSH_OFLAG_REQ, N_("device key")},
{NULL, 0, 0, NULL}
};
static bool
cmdNodeDeviceReAttach(vshControl *ctl, const vshCmd *cmd)
{
const char *name = NULL;
virNodeDevicePtr device;
bool ret = true;
if (!vshConnectionUsability(ctl, ctl->conn))
return false;
if (vshCommandOptString(cmd, "device", &name) <= 0)
return false;
if (!(device = virNodeDeviceLookupByName(ctl->conn, name))) {
vshError(ctl, "%s '%s'", _("Could not find matching device"), name);
return false;
}
if (virNodeDeviceReAttach(device) == 0) {
vshPrint(ctl, _("Device %s re-attached\n"), name);
} else {
vshError(ctl, _("Failed to re-attach device %s"), name);
ret = false;
}
virNodeDeviceFree(device);
return ret;
}
/*
* "nodedev-reset" command
*/
static const vshCmdInfo info_node_device_reset[] = {
{"help", N_("reset node device")},
{"desc", N_("Reset node device before or after assigning to a domain.")},
{NULL, NULL}
};
static const vshCmdOptDef opts_node_device_reset[] = {
{"device", VSH_OT_DATA, VSH_OFLAG_REQ, N_("device key")},
{NULL, 0, 0, NULL}
};
static bool
cmdNodeDeviceReset(vshControl *ctl, const vshCmd *cmd)
{
const char *name = NULL;
virNodeDevicePtr device;
bool ret = true;
if (!vshConnectionUsability(ctl, ctl->conn))
return false;
if (vshCommandOptString(cmd, "device", &name) <= 0)
return false;
if (!(device = virNodeDeviceLookupByName(ctl->conn, name))) {
vshError(ctl, "%s '%s'", _("Could not find matching device"), name);
return false;
}
if (virNodeDeviceReset(device) == 0) {
vshPrint(ctl, _("Device %s reset\n"), name);
} else {
vshError(ctl, _("Failed to reset device %s"), name);
ret = false;
}
virNodeDeviceFree(device);
return ret;
}
const vshCmdDef nodedevCmds[] = {
{"nodedev-create", cmdNodeDeviceCreate, opts_node_device_create,
info_node_device_create, 0},
{"nodedev-destroy", cmdNodeDeviceDestroy, opts_node_device_destroy,
info_node_device_destroy, 0},
{"nodedev-detach", cmdNodeDeviceDetach, opts_node_device_detach,
info_node_device_detach, 0},
{"nodedev-dettach", cmdNodeDeviceDetach, opts_node_device_detach,
info_node_device_detach, VSH_CMD_FLAG_ALIAS},
{"nodedev-dumpxml", cmdNodeDeviceDumpXML, opts_node_device_dumpxml,
info_node_device_dumpxml, 0},
{"nodedev-list", cmdNodeListDevices, opts_node_list_devices,
info_node_list_devices, 0},
{"nodedev-reattach", cmdNodeDeviceReAttach, opts_node_device_reattach,
info_node_device_reattach, 0},
{"nodedev-reset", cmdNodeDeviceReset, opts_node_device_reset,
info_node_device_reset, 0},
{NULL, NULL, NULL, NULL, 0}
};