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libvirt/src/node_device/node_device_udev.c
Daniel P. Berrange 55ea7be7d9 Removing probing of secondary drivers 
For stateless, client side drivers, it is never correct to
probe for secondary drivers. It is only ever appropriate to
use the secondary driver that is associated with the
hypervisor in question. As a result the ESX & HyperV drivers
have both been forced to do hacks where they register no-op
drivers for the ones they don't implement.

For stateful, server side drivers, we always just want to
use the same built-in shared driver. The exception is
virtualbox which is really a stateless driver and so wants
to use its own server side secondary drivers. To deal with
this virtualbox has to be built as 3 separate loadable
modules to allow registration to work in the right order.

This can all be simplified by introducing a new struct
recording the precise set of secondary drivers each
hypervisor driver wants

struct _virConnectDriver {
    virHypervisorDriverPtr hypervisorDriver;
    virInterfaceDriverPtr interfaceDriver;
    virNetworkDriverPtr networkDriver;
    virNodeDeviceDriverPtr nodeDeviceDriver;
    virNWFilterDriverPtr nwfilterDriver;
    virSecretDriverPtr secretDriver;
    virStorageDriverPtr storageDriver;
};

Instead of registering the hypervisor driver, we now
just register a virConnectDriver instead. This allows
us to remove all probing of secondary drivers. Once we
have chosen the primary driver, we immediately know the
correct secondary drivers to use.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2015-01-27 12:02:04 +00:00

1855 lines
52 KiB
C
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/*
* node_device_udev.c: node device enumeration - libudev implementation
*
* Copyright (C) 2009-2014 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: Dave Allan <dallan@redhat.com>
*/
#include <config.h>
#include <libudev.h>
#include <pciaccess.h>
#include <scsi/scsi.h>
#include <c-ctype.h>
#include "dirname.h"
#include "node_device_udev.h"
#include "virerror.h"
#include "node_device_conf.h"
#include "node_device_driver.h"
#include "driver.h"
#include "datatypes.h"
#include "virlog.h"
#include "viralloc.h"
#include "viruuid.h"
#include "virbuffer.h"
#include "virfile.h"
#include "virpci.h"
#include "virstring.h"
#include "virnetdev.h"
#define VIR_FROM_THIS VIR_FROM_NODEDEV
VIR_LOG_INIT("node_device.node_device_udev");
#ifndef TYPE_RAID
# define TYPE_RAID 12
#endif
struct _udevPrivate {
struct udev_monitor *udev_monitor;
int watch;
bool privileged;
};
static int udevStrToLong_ull(char const *s,
char **end_ptr,
int base,
unsigned long long *result)
{
int ret = 0;
ret = virStrToLong_ull(s, end_ptr, base, result);
if (ret != 0) {
VIR_ERROR(_("Failed to convert '%s' to unsigned long long"), s);
} else {
VIR_DEBUG("Converted '%s' to unsigned long %llu", s, *result);
}
return ret;
}
static int udevStrToLong_ui(char const *s,
char **end_ptr,
int base,
unsigned int *result)
{
int ret = 0;
ret = virStrToLong_ui(s, end_ptr, base, result);
if (ret != 0) {
VIR_ERROR(_("Failed to convert '%s' to unsigned int"), s);
} else {
VIR_DEBUG("Converted '%s' to unsigned int %u", s, *result);
}
return ret;
}
static int udevStrToLong_i(char const *s,
char **end_ptr,
int base,
int *result)
{
int ret = 0;
ret = virStrToLong_i(s, end_ptr, base, result);
if (ret != 0) {
VIR_ERROR(_("Failed to convert '%s' to int"), s);
} else {
VIR_DEBUG("Converted '%s' to int %u", s, *result);
}
return ret;
}
/* This function allocates memory from the heap for the property
* value. That memory must be later freed by some other code. */
static int udevGetDeviceProperty(struct udev_device *udev_device,
const char *property_key,
char **property_value)
{
const char *udev_value = NULL;
int ret = PROPERTY_FOUND;
udev_value = udev_device_get_property_value(udev_device, property_key);
if (udev_value == NULL) {
VIR_DEBUG("udev reports device '%s' does not have property '%s'",
udev_device_get_sysname(udev_device), property_key);
ret = PROPERTY_MISSING;
goto out;
}
/* If this allocation is changed, the comment at the beginning
* of the function must also be changed. */
if (VIR_STRDUP(*property_value, udev_value) < 0) {
VIR_ERROR(_("Failed to allocate memory for property value for "
"property key '%s' on device with sysname '%s'"),
property_key, udev_device_get_sysname(udev_device));
ret = PROPERTY_ERROR;
goto out;
}
VIR_DEBUG("Found property key '%s' value '%s' "
"for device with sysname '%s'",
property_key, *property_value,
udev_device_get_sysname(udev_device));
out:
return ret;
}
static int udevGetStringProperty(struct udev_device *udev_device,
const char *property_key,
char **value)
{
return udevGetDeviceProperty(udev_device, property_key, value);
}
static int udevGetIntProperty(struct udev_device *udev_device,
const char *property_key,
int *value,
int base)
{
char *udev_value = NULL;
int ret = PROPERTY_FOUND;
ret = udevGetDeviceProperty(udev_device, property_key, &udev_value);
if (ret == PROPERTY_FOUND) {
if (udevStrToLong_i(udev_value, NULL, base, value) != 0)
ret = PROPERTY_ERROR;
}
VIR_FREE(udev_value);
return ret;
}
static int udevGetUintProperty(struct udev_device *udev_device,
const char *property_key,
unsigned int *value,
int base)
{
char *udev_value = NULL;
int ret = PROPERTY_FOUND;
ret = udevGetDeviceProperty(udev_device, property_key, &udev_value);
if (ret == PROPERTY_FOUND) {
if (udevStrToLong_ui(udev_value, NULL, base, value) != 0)
ret = PROPERTY_ERROR;
}
VIR_FREE(udev_value);
return ret;
}
/* This function allocates memory from the heap for the property
* value. That memory must be later freed by some other code. */
static int udevGetDeviceSysfsAttr(struct udev_device *udev_device,
const char *attr_name,
char **attr_value)
{
const char *udev_value = NULL;
int ret = PROPERTY_FOUND;
udev_value = udev_device_get_sysattr_value(udev_device, attr_name);
if (udev_value == NULL) {
VIR_DEBUG("udev reports device '%s' does not have sysfs attr '%s'",
udev_device_get_sysname(udev_device), attr_name);
ret = PROPERTY_MISSING;
goto out;
}
/* If this allocation is changed, the comment at the beginning
* of the function must also be changed. */
if (VIR_STRDUP(*attr_value, udev_value) < 0) {
VIR_ERROR(_("Failed to allocate memory for sysfs attribute value for "
"sysfs attribute '%s' on device with sysname '%s'"),
attr_name, udev_device_get_sysname(udev_device));
ret = PROPERTY_ERROR;
goto out;
}
VIR_DEBUG("Found sysfs attribute '%s' value '%s' "
"for device with sysname '%s'",
attr_name, *attr_value,
udev_device_get_sysname(udev_device));
out:
return ret;
}
static int udevGetStringSysfsAttr(struct udev_device *udev_device,
const char *attr_name,
char **value)
{
char *tmp = NULL;
int ret = PROPERTY_MISSING;
ret = udevGetDeviceSysfsAttr(udev_device, attr_name, &tmp);
if (tmp != NULL && (STREQ(tmp, ""))) {
VIR_FREE(tmp);
tmp = NULL;
ret = PROPERTY_MISSING;
}
*value = tmp;
return ret;
}
static int udevGetIntSysfsAttr(struct udev_device *udev_device,
const char *attr_name,
int *value,
int base)
{
char *udev_value = NULL;
int ret = PROPERTY_FOUND;
ret = udevGetDeviceSysfsAttr(udev_device, attr_name, &udev_value);
if (ret == PROPERTY_FOUND) {
if (udevStrToLong_i(udev_value, NULL, base, value) != 0)
ret = PROPERTY_ERROR;
}
VIR_FREE(udev_value);
return ret;
}
static int udevGetUintSysfsAttr(struct udev_device *udev_device,
const char *attr_name,
unsigned int *value,
int base)
{
char *udev_value = NULL;
int ret = PROPERTY_FOUND;
ret = udevGetDeviceSysfsAttr(udev_device, attr_name, &udev_value);
if (ret == PROPERTY_FOUND) {
if (udevStrToLong_ui(udev_value, NULL, base, value) != 0)
ret = PROPERTY_ERROR;
}
VIR_FREE(udev_value);
return ret;
}
static int udevGetUint64SysfsAttr(struct udev_device *udev_device,
const char *attr_name,
unsigned long long *value)
{
char *udev_value = NULL;
int ret = PROPERTY_FOUND;
ret = udevGetDeviceSysfsAttr(udev_device, attr_name, &udev_value);
if (ret == PROPERTY_FOUND) {
if (udevStrToLong_ull(udev_value, NULL, 0, value) != 0)
ret = PROPERTY_ERROR;
}
VIR_FREE(udev_value);
return ret;
}
static int udevGenerateDeviceName(struct udev_device *device,
virNodeDeviceDefPtr def,
const char *s)
{
int ret = 0;
size_t i;
virBuffer buf = VIR_BUFFER_INITIALIZER;
virBufferAsprintf(&buf, "%s_%s",
udev_device_get_subsystem(device),
udev_device_get_sysname(device));
if (s != NULL)
virBufferAsprintf(&buf, "_%s", s);
if (virBufferCheckError(&buf) < 0)
return -1;
def->name = virBufferContentAndReset(&buf);
for (i = 0; i < strlen(def->name); i++) {
if (!(c_isalnum(*(def->name + i))))
*(def->name + i) = '_';
}
return ret;
}
#if HAVE_UDEV_LOGGING
typedef void (*udevLogFunctionPtr)(struct udev *udev,
int priority,
const char *file,
int line,
const char *fn,
const char *format,
va_list args);
static void
ATTRIBUTE_FMT_PRINTF(6, 0)
udevLogFunction(struct udev *udev ATTRIBUTE_UNUSED,
int priority,
const char *file,
int line,
const char *fn,
const char *fmt,
va_list args)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
char *format = NULL;
virBufferAdd(&buf, fmt, -1);
virBufferTrim(&buf, "\n", -1);
format = virBufferContentAndReset(&buf);
virLogVMessage(&virLogSelf,
virLogPriorityFromSyslog(priority),
file, line, fn, NULL, format ? format : fmt, args);
VIR_FREE(format);
}
#endif
static int udevTranslatePCIIds(unsigned int vendor,
unsigned int product,
char **vendor_string,
char **product_string)
{
int ret = -1;
struct pci_id_match m;
const char *vendor_name = NULL, *device_name = NULL;
m.vendor_id = vendor;
m.device_id = product;
m.subvendor_id = PCI_MATCH_ANY;
m.subdevice_id = PCI_MATCH_ANY;
m.device_class = 0;
m.device_class_mask = 0;
m.match_data = 0;
/* pci_get_strings returns void */
pci_get_strings(&m,
&device_name,
&vendor_name,
NULL,
NULL);
if (VIR_STRDUP(*vendor_string, vendor_name) < 0||
VIR_STRDUP(*product_string, device_name) < 0)
goto out;
ret = 0;
out:
return ret;
}
static int udevProcessPCI(struct udev_device *device,
virNodeDeviceDefPtr def)
{
const char *syspath = NULL;
union _virNodeDevCapData *data = &def->caps->data;
virPCIDeviceAddress addr;
virPCIEDeviceInfoPtr pci_express = NULL;
virPCIDevicePtr pciDev = NULL;
udevPrivate *priv = driver->privateData;
int tmpGroup, ret = -1;
char *p;
int rc;
syspath = udev_device_get_syspath(device);
if (udevGetUintProperty(device,
"PCI_CLASS",
&data->pci_dev.class,
16) == PROPERTY_ERROR) {
goto out;
}
p = strrchr(syspath, '/');
if ((p == NULL) || (udevStrToLong_ui(p+1,
&p,
16,
&data->pci_dev.domain) == -1)) {
goto out;
}
if ((p == NULL) || (udevStrToLong_ui(p+1,
&p,
16,
&data->pci_dev.bus) == -1)) {
goto out;
}
if ((p == NULL) || (udevStrToLong_ui(p+1,
&p,
16,
&data->pci_dev.slot) == -1)) {
goto out;
}
if ((p == NULL) || (udevStrToLong_ui(p+1,
&p,
16,
&data->pci_dev.function) == -1)) {
goto out;
}
if (udevGetUintSysfsAttr(device,
"vendor",
&data->pci_dev.vendor,
16) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUintSysfsAttr(device,
"device",
&data->pci_dev.product,
16) == PROPERTY_ERROR) {
goto out;
}
if (udevTranslatePCIIds(data->pci_dev.vendor,
data->pci_dev.product,
&data->pci_dev.vendor_name,
&data->pci_dev.product_name) != 0) {
goto out;
}
if (udevGenerateDeviceName(device, def, NULL) != 0)
goto out;
rc = udevGetIntSysfsAttr(device,
"numa_node",
&data->pci_dev.numa_node,
10);
if (rc == PROPERTY_ERROR) {
goto out;
} else if (rc == PROPERTY_MISSING) {
/* The default value is -1, because it can't be 0
* as zero is valid node number. */
data->pci_dev.numa_node = -1;
}
if (!virPCIGetPhysicalFunction(syspath, &data->pci_dev.physical_function))
data->pci_dev.flags |= VIR_NODE_DEV_CAP_FLAG_PCI_PHYSICAL_FUNCTION;
rc = virPCIGetVirtualFunctions(syspath,
&data->pci_dev.virtual_functions,
&data->pci_dev.num_virtual_functions);
/* Out of memory */
if (rc < 0)
goto out;
else if (!rc && (data->pci_dev.num_virtual_functions > 0))
data->pci_dev.flags |= VIR_NODE_DEV_CAP_FLAG_PCI_VIRTUAL_FUNCTION;
/* iommu group */
addr.domain = data->pci_dev.domain;
addr.bus = data->pci_dev.bus;
addr.slot = data->pci_dev.slot;
addr.function = data->pci_dev.function;
tmpGroup = virPCIDeviceAddressGetIOMMUGroupNum(&addr);
if (tmpGroup == -1) {
/* error was already reported */
goto out;
/* -2 return means there is no iommu_group data */
} else if (tmpGroup >= 0) {
if (virPCIDeviceAddressGetIOMMUGroupAddresses(&addr, &data->pci_dev.iommuGroupDevices,
&data->pci_dev.nIommuGroupDevices) < 0)
goto out;
data->pci_dev.iommuGroupNumber = tmpGroup;
}
if (!(pciDev = virPCIDeviceNew(data->pci_dev.domain,
data->pci_dev.bus,
data->pci_dev.slot,
data->pci_dev.function)))
goto out;
/* We need to be root to read PCI device configs */
if (priv->privileged && virPCIDeviceIsPCIExpress(pciDev) > 0) {
if (VIR_ALLOC(pci_express) < 0)
goto out;
if (virPCIDeviceHasPCIExpressLink(pciDev) > 0) {
if (VIR_ALLOC(pci_express->link_cap) < 0 ||
VIR_ALLOC(pci_express->link_sta) < 0)
goto out;
if (virPCIDeviceGetLinkCapSta(pciDev,
&pci_express->link_cap->port,
&pci_express->link_cap->speed,
&pci_express->link_cap->width,
&pci_express->link_sta->speed,
&pci_express->link_sta->width) < 0)
goto out;
pci_express->link_sta->port = -1; /* PCIe can't negotiate port. Yet :) */
}
data->pci_dev.flags |= VIR_NODE_DEV_CAP_FLAG_PCIE;
data->pci_dev.pci_express = pci_express;
pci_express = NULL;
}
ret = 0;
out:
virPCIDeviceFree(pciDev);
virPCIEDeviceInfoFree(pci_express);
return ret;
}
static int udevProcessUSBDevice(struct udev_device *device,
virNodeDeviceDefPtr def)
{
union _virNodeDevCapData *data = &def->caps->data;
int ret = -1;
int err;
if (udevGetUintProperty(device,
"BUSNUM",
&data->usb_dev.bus,
10) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUintProperty(device,
"DEVNUM",
&data->usb_dev.device,
10) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUintProperty(device,
"ID_VENDOR_ID",
&data->usb_dev.vendor,
16) == PROPERTY_ERROR) {
goto out;
}
err = udevGetStringProperty(device,
"ID_VENDOR_FROM_DATABASE",
&data->usb_dev.vendor_name);
if (err == PROPERTY_ERROR)
goto out;
if (err == PROPERTY_MISSING) {
if (udevGetStringSysfsAttr(device,
"manufacturer",
&data->usb_dev.vendor_name) == PROPERTY_ERROR) {
goto out;
}
}
if (udevGetUintProperty(device,
"ID_MODEL_ID",
&data->usb_dev.product,
16) == PROPERTY_ERROR) {
goto out;
}
err = udevGetStringProperty(device,
"ID_MODEL_FROM_DATABASE",
&data->usb_dev.product_name);
if (err == PROPERTY_ERROR)
goto out;
if (err == PROPERTY_MISSING) {
if (udevGetStringSysfsAttr(device,
"product",
&data->usb_dev.product_name) == PROPERTY_ERROR) {
goto out;
}
}
if (udevGenerateDeviceName(device, def, NULL) != 0)
goto out;
ret = 0;
out:
return ret;
}
static int udevProcessUSBInterface(struct udev_device *device,
virNodeDeviceDefPtr def)
{
int ret = -1;
union _virNodeDevCapData *data = &def->caps->data;
if (udevGetUintSysfsAttr(device,
"bInterfaceNumber",
&data->usb_if.number,
16) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUintSysfsAttr(device,
"bInterfaceClass",
&data->usb_if._class,
16) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUintSysfsAttr(device,
"bInterfaceSubClass",
&data->usb_if.subclass,
16) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUintSysfsAttr(device,
"bInterfaceProtocol",
&data->usb_if.protocol,
16) == PROPERTY_ERROR) {
goto out;
}
if (udevGenerateDeviceName(device, def, NULL) != 0)
goto out;
ret = 0;
out:
return ret;
}
static int udevProcessNetworkInterface(struct udev_device *device,
virNodeDeviceDefPtr def)
{
int ret = -1;
const char *devtype = udev_device_get_devtype(device);
union _virNodeDevCapData *data = &def->caps->data;
if (devtype && STREQ(devtype, "wlan")) {
data->net.subtype = VIR_NODE_DEV_CAP_NET_80211;
} else {
data->net.subtype = VIR_NODE_DEV_CAP_NET_80203;
}
if (udevGetStringProperty(device,
"INTERFACE",
&data->net.ifname) == PROPERTY_ERROR) {
goto out;
}
if (udevGetStringSysfsAttr(device,
"address",
&data->net.address) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUintSysfsAttr(device,
"addr_len",
&data->net.address_len,
0) == PROPERTY_ERROR) {
goto out;
}
if (udevGenerateDeviceName(device, def, data->net.address) != 0)
goto out;
if (virNetDevGetLinkInfo(data->net.ifname, &data->net.lnk) < 0)
goto out;
ret = 0;
out:
return ret;
}
static int udevProcessSCSIHost(struct udev_device *device ATTRIBUTE_UNUSED,
virNodeDeviceDefPtr def)
{
int ret = -1;
union _virNodeDevCapData *data = &def->caps->data;
char *filename = NULL;
filename = last_component(def->sysfs_path);
if (!STRPREFIX(filename, "host")) {
VIR_ERROR(_("SCSI host found, but its udev name '%s' does "
"not begin with 'host'"), filename);
goto out;
}
if (udevStrToLong_ui(filename + strlen("host"),
NULL,
0,
&data->scsi_host.host) == -1) {
goto out;
}
detect_scsi_host_caps(&def->caps->data);
if (udevGenerateDeviceName(device, def, NULL) != 0)
goto out;
ret = 0;
out:
return ret;
}
static int udevProcessSCSITarget(struct udev_device *device ATTRIBUTE_UNUSED,
virNodeDeviceDefPtr def)
{
int ret = -1;
const char *sysname = NULL;
union _virNodeDevCapData *data = &def->caps->data;
sysname = udev_device_get_sysname(device);
if (VIR_STRDUP(data->scsi_target.name, sysname) < 0)
goto out;
if (udevGenerateDeviceName(device, def, NULL) != 0)
goto out;
ret = 0;
out:
return ret;
}
static int udevGetSCSIType(virNodeDeviceDefPtr def ATTRIBUTE_UNUSED,
unsigned int type, char **typestring)
{
int ret = 0;
int foundtype = 1;
*typestring = NULL;
switch (type) {
case TYPE_DISK:
ignore_value(VIR_STRDUP(*typestring, "disk"));
break;
case TYPE_TAPE:
ignore_value(VIR_STRDUP(*typestring, "tape"));
break;
case TYPE_PROCESSOR:
ignore_value(VIR_STRDUP(*typestring, "processor"));
break;
case TYPE_WORM:
ignore_value(VIR_STRDUP(*typestring, "worm"));
break;
case TYPE_ROM:
ignore_value(VIR_STRDUP(*typestring, "cdrom"));
break;
case TYPE_SCANNER:
ignore_value(VIR_STRDUP(*typestring, "scanner"));
break;
case TYPE_MOD:
ignore_value(VIR_STRDUP(*typestring, "mod"));
break;
case TYPE_MEDIUM_CHANGER:
ignore_value(VIR_STRDUP(*typestring, "changer"));
break;
case TYPE_ENCLOSURE:
ignore_value(VIR_STRDUP(*typestring, "enclosure"));
break;
case TYPE_RAID:
ignore_value(VIR_STRDUP(*typestring, "raid"));
break;
case TYPE_NO_LUN:
default:
foundtype = 0;
break;
}
if (*typestring == NULL) {
if (foundtype == 1) {
ret = -1;
} else {
VIR_DEBUG("Failed to find SCSI device type %d for %s",
type, def->sysfs_path);
}
}
return ret;
}
static int udevProcessSCSIDevice(struct udev_device *device ATTRIBUTE_UNUSED,
virNodeDeviceDefPtr def)
{
int ret = -1;
unsigned int tmp = 0;
union _virNodeDevCapData *data = &def->caps->data;
char *filename = NULL, *p = NULL;
filename = last_component(def->sysfs_path);
if (udevStrToLong_ui(filename, &p, 10, &data->scsi.host) == -1)
goto out;
if ((p == NULL) || (udevStrToLong_ui(p+1,
&p,
10,
&data->scsi.bus) == -1)) {
goto out;
}
if ((p == NULL) || (udevStrToLong_ui(p+1,
&p,
10,
&data->scsi.target) == -1)) {
goto out;
}
if ((p == NULL) || (udevStrToLong_ui(p+1,
&p,
10,
&data->scsi.lun) == -1)) {
goto out;
}
switch (udevGetUintSysfsAttr(device, "type", &tmp, 0)) {
case PROPERTY_FOUND:
if (udevGetSCSIType(def, tmp, &data->scsi.type) == -1)
goto out;
break;
case PROPERTY_MISSING:
break; /* No type is not an error */
case PROPERTY_ERROR:
default:
goto out;
break;
}
if (udevGenerateDeviceName(device, def, NULL) != 0)
goto out;
ret = 0;
out:
if (ret != 0) {
VIR_ERROR(_("Failed to process SCSI device with sysfs path '%s'"),
def->sysfs_path);
}
return ret;
}
static int udevProcessDisk(struct udev_device *device,
virNodeDeviceDefPtr def)
{
union _virNodeDevCapData *data = &def->caps->data;
int ret = 0;
if (udevGetUint64SysfsAttr(device,
"size",
&data->storage.num_blocks) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUint64SysfsAttr(device,
"queue/logical_block_size",
&data->storage.logical_block_size)
== PROPERTY_ERROR) {
goto out;
}
data->storage.size = data->storage.num_blocks *
data->storage.logical_block_size;
out:
return ret;
}
static int udevProcessRemoveableMedia(struct udev_device *device,
virNodeDeviceDefPtr def,
int has_media)
{
union _virNodeDevCapData *data = &def->caps->data;
int tmp_int = 0, ret = 0;
if ((udevGetIntSysfsAttr(device, "removable", &tmp_int, 0) == PROPERTY_FOUND) &&
(tmp_int == 1)) {
def->caps->data.storage.flags |= VIR_NODE_DEV_CAP_STORAGE_REMOVABLE;
}
if (has_media) {
def->caps->data.storage.flags |=
VIR_NODE_DEV_CAP_STORAGE_REMOVABLE_MEDIA_AVAILABLE;
if (udevGetStringProperty(device, "ID_FS_LABEL",
&data->storage.media_label) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUint64SysfsAttr(device,
"size",
&data->storage.num_blocks) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUint64SysfsAttr(device,
"queue/logical_block_size",
&data->storage.logical_block_size) == PROPERTY_ERROR) {
goto out;
}
/* XXX This calculation is wrong for the qemu virtual cdrom
* which reports the size in 512 byte blocks, but the logical
* block size as 2048. I don't have a physical cdrom on a
* devel system to see how they behave. */
def->caps->data.storage.removable_media_size =
def->caps->data.storage.num_blocks *
def->caps->data.storage.logical_block_size;
}
out:
return ret;
}
static int udevProcessCDROM(struct udev_device *device,
virNodeDeviceDefPtr def)
{
int ret = -1;
int tmp_int = 0;
int has_media = 0;
/* NB: the drive_type string provided by udev is different from
* that provided by HAL; now it's "cd" instead of "cdrom" We
* change it to cdrom to preserve compatibility with earlier
* versions of libvirt. */
VIR_FREE(def->caps->data.storage.drive_type);
if (VIR_STRDUP(def->caps->data.storage.drive_type, "cdrom") < 0)
goto out;
if ((udevGetIntProperty(device, "ID_CDROM_MEDIA",
&tmp_int, 0) == PROPERTY_FOUND))
has_media = tmp_int;
ret = udevProcessRemoveableMedia(device, def, has_media);
out:
return ret;
}
static int udevProcessFloppy(struct udev_device *device,
virNodeDeviceDefPtr def)
{
int tmp_int = 0;
int has_media = 0;
char *tmp_str = NULL;
if ((udevGetIntProperty(device, "DKD_MEDIA_AVAILABLE",
&tmp_int, 0) == PROPERTY_FOUND))
/* USB floppy */
has_media = tmp_int;
else if (udevGetStringProperty(device, "ID_FS_LABEL",
&tmp_str) == PROPERTY_FOUND) {
/* Legacy floppy */
has_media = 1;
VIR_FREE(tmp_str);
}
return udevProcessRemoveableMedia(device, def, has_media);
}
static int udevProcessSD(struct udev_device *device,
virNodeDeviceDefPtr def)
{
union _virNodeDevCapData *data = &def->caps->data;
int ret = 0;
if (udevGetUint64SysfsAttr(device,
"size",
&data->storage.num_blocks) == PROPERTY_ERROR) {
goto out;
}
if (udevGetUint64SysfsAttr(device,
"queue/logical_block_size",
&data->storage.logical_block_size)
== PROPERTY_ERROR) {
goto out;
}
data->storage.size = data->storage.num_blocks *
data->storage.logical_block_size;
out:
return ret;
}
/* This function exists to deal with the case in which a driver does
* not provide a device type in the usual place, but udev told us it's
* a storage device, and we can make a good guess at what kind of
* storage device it is from other information that is provided. */
static int udevKludgeStorageType(virNodeDeviceDefPtr def)
{
int ret = -1;
VIR_DEBUG("Could not find definitive storage type for device "
"with sysfs path '%s', trying to guess it",
def->sysfs_path);
if (STRPREFIX(def->caps->data.storage.block, "/dev/vd")) {
/* virtio disk */
ret = VIR_STRDUP(def->caps->data.storage.drive_type, "disk");
}
if (ret != 0) {
VIR_DEBUG("Could not determine storage type for device "
"with sysfs path '%s'", def->sysfs_path);
} else {
VIR_DEBUG("Found storage type '%s' for device "
"with sysfs path '%s'",
def->caps->data.storage.drive_type,
def->sysfs_path);
}
return ret;
}
static void udevStripSpaces(char *s)
{
if (s == NULL)
return;
while (virFileStripSuffix(s, " ")) {
/* do nothing */
;
}
return;
}
static int udevProcessStorage(struct udev_device *device,
virNodeDeviceDefPtr def)
{
union _virNodeDevCapData *data = &def->caps->data;
int ret = -1;
const char* devnode;
devnode = udev_device_get_devnode(device);
if (!devnode) {
VIR_DEBUG("No devnode for '%s'", udev_device_get_devpath(device));
goto out;
}
if (VIR_STRDUP(data->storage.block, devnode) < 0)
goto out;
if (udevGetStringProperty(device,
"ID_BUS",
&data->storage.bus) == PROPERTY_ERROR) {
goto out;
}
if (udevGetStringProperty(device,
"ID_SERIAL",
&data->storage.serial) == PROPERTY_ERROR) {
goto out;
}
if (udevGetStringSysfsAttr(device,
"device/vendor",
&data->storage.vendor) == PROPERTY_ERROR) {
goto out;
}
udevStripSpaces(def->caps->data.storage.vendor);
if (udevGetStringSysfsAttr(device,
"device/model",
&data->storage.model) == PROPERTY_ERROR) {
goto out;
}
udevStripSpaces(def->caps->data.storage.model);
/* There is no equivalent of the hotpluggable property in libudev,
* but storage is going toward a world in which hotpluggable is
* expected, so I don't see a problem with not having a property
* for it. */
if (udevGetStringProperty(device,
"ID_TYPE",
&data->storage.drive_type) != PROPERTY_FOUND ||
STREQ(def->caps->data.storage.drive_type, "generic")) {
int tmp_int = 0;
/* All floppy drives have the ID_DRIVE_FLOPPY prop. This is
* needed since legacy floppies don't have a drive_type */
if (udevGetIntProperty(device, "ID_DRIVE_FLOPPY",
&tmp_int, 0) == PROPERTY_FOUND &&
tmp_int == 1) {
if (VIR_STRDUP(data->storage.drive_type, "floppy") < 0)
goto out;
} else if (udevGetIntProperty(device, "ID_CDROM",
&tmp_int, 0) == PROPERTY_FOUND &&
tmp_int == 1) {
if (VIR_STRDUP(data->storage.drive_type, "cd") < 0)
goto out;
} else if (udevGetIntProperty(device, "ID_DRIVE_FLASH_SD",
&tmp_int, 0) == PROPERTY_FOUND &&
tmp_int == 1) {
if (VIR_STRDUP(data->storage.drive_type, "sd") < 0)
goto out;
} else {
/* If udev doesn't have it, perhaps we can guess it. */
if (udevKludgeStorageType(def) != 0)
goto out;
}
}
if (STREQ(def->caps->data.storage.drive_type, "cd")) {
ret = udevProcessCDROM(device, def);
} else if (STREQ(def->caps->data.storage.drive_type, "disk")) {
ret = udevProcessDisk(device, def);
} else if (STREQ(def->caps->data.storage.drive_type, "floppy")) {
ret = udevProcessFloppy(device, def);
} else if (STREQ(def->caps->data.storage.drive_type, "sd")) {
ret = udevProcessSD(device, def);
} else {
VIR_DEBUG("Unsupported storage type '%s'",
def->caps->data.storage.drive_type);
goto out;
}
if (udevGenerateDeviceName(device, def, data->storage.serial) != 0)
goto out;
out:
VIR_DEBUG("Storage ret=%d", ret);
return ret;
}
static int
udevProcessSCSIGeneric(struct udev_device *dev,
virNodeDeviceDefPtr def)
{
if (udevGetStringProperty(dev,
"DEVNAME",
&def->caps->data.sg.path) != PROPERTY_FOUND)
return -1;
if (udevGenerateDeviceName(dev, def, NULL) != 0)
return -1;
return 0;
}
static bool
udevHasDeviceProperty(struct udev_device *dev,
const char *key)
{
if (udev_device_get_property_value(dev, key))
return true;
return false;
}
static int
udevGetDeviceType(struct udev_device *device,
virNodeDevCapType *type)
{
const char *devtype = NULL;
char *subsystem = NULL;
int ret = -1;
devtype = udev_device_get_devtype(device);
*type = 0;
if (devtype) {
if (STREQ(devtype, "usb_device"))
*type = VIR_NODE_DEV_CAP_USB_DEV;
else if (STREQ(devtype, "usb_interface"))
*type = VIR_NODE_DEV_CAP_USB_INTERFACE;
else if (STREQ(devtype, "scsi_host"))
*type = VIR_NODE_DEV_CAP_SCSI_HOST;
else if (STREQ(devtype, "scsi_target"))
*type = VIR_NODE_DEV_CAP_SCSI_TARGET;
else if (STREQ(devtype, "scsi_device"))
*type = VIR_NODE_DEV_CAP_SCSI;
else if (STREQ(devtype, "disk"))
*type = VIR_NODE_DEV_CAP_STORAGE;
else if (STREQ(devtype, "wlan"))
*type = VIR_NODE_DEV_CAP_NET;
} else {
/* PCI devices don't set the DEVTYPE property. */
if (udevHasDeviceProperty(device, "PCI_CLASS"))
*type = VIR_NODE_DEV_CAP_PCI_DEV;
/* Wired network interfaces don't set the DEVTYPE property,
* USB devices also have an INTERFACE property, but they do
* set DEVTYPE, so if devtype is NULL and the INTERFACE
* property exists, we have a network device. */
if (udevHasDeviceProperty(device, "INTERFACE"))
*type = VIR_NODE_DEV_CAP_NET;
/* SCSI generic device doesn't set DEVTYPE property */
if (udevGetStringProperty(device, "SUBSYSTEM", &subsystem) ==
PROPERTY_FOUND &&
STREQ(subsystem, "scsi_generic"))
*type = VIR_NODE_DEV_CAP_SCSI_GENERIC;
VIR_FREE(subsystem);
}
if (!*type)
VIR_DEBUG("Could not determine device type for device "
"with sysfs name '%s'",
udev_device_get_sysname(device));
else
ret = 0;
return ret;
}
static int udevGetDeviceDetails(struct udev_device *device,
virNodeDeviceDefPtr def)
{
int ret = 0;
switch (def->caps->type) {
case VIR_NODE_DEV_CAP_SYSTEM:
/* There's no libudev equivalent of system, so ignore it. */
break;
case VIR_NODE_DEV_CAP_PCI_DEV:
ret = udevProcessPCI(device, def);
break;
case VIR_NODE_DEV_CAP_USB_DEV:
ret = udevProcessUSBDevice(device, def);
break;
case VIR_NODE_DEV_CAP_USB_INTERFACE:
ret = udevProcessUSBInterface(device, def);
break;
case VIR_NODE_DEV_CAP_NET:
ret = udevProcessNetworkInterface(device, def);
break;
case VIR_NODE_DEV_CAP_SCSI_HOST:
ret = udevProcessSCSIHost(device, def);
break;
case VIR_NODE_DEV_CAP_SCSI_TARGET:
ret = udevProcessSCSITarget(device, def);
break;
case VIR_NODE_DEV_CAP_SCSI:
ret = udevProcessSCSIDevice(device, def);
break;
case VIR_NODE_DEV_CAP_STORAGE:
ret = udevProcessStorage(device, def);
break;
case VIR_NODE_DEV_CAP_SCSI_GENERIC:
ret = udevProcessSCSIGeneric(device, def);
break;
default:
VIR_ERROR(_("Unknown device type %d"), def->caps->type);
ret = -1;
break;
}
return ret;
}
static int udevRemoveOneDevice(struct udev_device *device)
{
virNodeDeviceObjPtr dev = NULL;
const char *name = NULL;
int ret = 0;
name = udev_device_get_syspath(device);
dev = virNodeDeviceFindBySysfsPath(&driver->devs, name);
if (dev != NULL) {
VIR_DEBUG("Removing device '%s' with sysfs path '%s'",
dev->def->name, name);
virNodeDeviceObjRemove(&driver->devs, dev);
} else {
VIR_DEBUG("Failed to find device to remove that has udev name '%s'",
name);
ret = -1;
}
return ret;
}
static int udevSetParent(struct udev_device *device,
virNodeDeviceDefPtr def)
{
struct udev_device *parent_device = NULL;
const char *parent_sysfs_path = NULL;
virNodeDeviceObjPtr dev = NULL;
int ret = -1;
parent_device = device;
do {
parent_device = udev_device_get_parent(parent_device);
if (parent_device == NULL)
break;
parent_sysfs_path = udev_device_get_syspath(parent_device);
if (parent_sysfs_path == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Could not get syspath for parent of '%s'"),
udev_device_get_syspath(parent_device));
goto out;
}
dev = virNodeDeviceFindBySysfsPath(&driver->devs,
parent_sysfs_path);
if (dev != NULL) {
if (VIR_STRDUP(def->parent, dev->def->name) < 0) {
virNodeDeviceObjUnlock(dev);
goto out;
}
virNodeDeviceObjUnlock(dev);
if (VIR_STRDUP(def->parent_sysfs_path, parent_sysfs_path) < 0)
goto out;
}
} while (def->parent == NULL && parent_device != NULL);
if (!def->parent && VIR_STRDUP(def->parent, "computer") < 0)
goto out;
ret = 0;
out:
return ret;
}
static int udevAddOneDevice(struct udev_device *device)
{
virNodeDeviceDefPtr def = NULL;
virNodeDeviceObjPtr dev = NULL;
int ret = -1;
if (VIR_ALLOC(def) != 0)
goto out;
if (VIR_STRDUP(def->sysfs_path, udev_device_get_syspath(device)) < 0)
goto out;
if (udevGetStringProperty(device,
"DRIVER",
&def->driver) == PROPERTY_ERROR) {
goto out;
}
if (VIR_ALLOC(def->caps) != 0)
goto out;
if (udevGetDeviceType(device, &def->caps->type) != 0)
goto out;
if (udevGetDeviceDetails(device, def) != 0)
goto out;
if (udevSetParent(device, def) != 0)
goto out;
/* If this is a device change, the old definition will be freed
* and the current definition will take its place. */
dev = virNodeDeviceAssignDef(&driver->devs, def);
if (dev == NULL) {
VIR_ERROR(_("Failed to create device for '%s'"), def->name);
goto out;
}
virNodeDeviceObjUnlock(dev);
ret = 0;
out:
if (ret != 0) {
VIR_DEBUG("Discarding device %d %p %s", ret, def,
def ? NULLSTR(def->sysfs_path) : "");
virNodeDeviceDefFree(def);
}
return ret;
}
static int udevProcessDeviceListEntry(struct udev *udev,
struct udev_list_entry *list_entry)
{
struct udev_device *device;
const char *name = NULL;
int ret = -1;
name = udev_list_entry_get_name(list_entry);
device = udev_device_new_from_syspath(udev, name);
if (device != NULL) {
if (udevAddOneDevice(device) != 0) {
VIR_DEBUG("Failed to create node device for udev device '%s'",
name);
}
ret = 0;
}
udev_device_unref(device);
return ret;
}
static int udevEnumerateDevices(struct udev *udev)
{
struct udev_enumerate *udev_enumerate = NULL;
struct udev_list_entry *list_entry = NULL;
int ret = 0;
udev_enumerate = udev_enumerate_new(udev);
ret = udev_enumerate_scan_devices(udev_enumerate);
if (0 != ret) {
VIR_ERROR(_("udev scan devices returned %d"), ret);
goto out;
}
udev_list_entry_foreach(list_entry,
udev_enumerate_get_list_entry(udev_enumerate)) {
udevProcessDeviceListEntry(udev, list_entry);
}
out:
udev_enumerate_unref(udev_enumerate);
return ret;
}
static int nodeStateCleanup(void)
{
int ret = 0;
udevPrivate *priv = NULL;
struct udev_monitor *udev_monitor = NULL;
struct udev *udev = NULL;
if (driver) {
nodeDeviceLock();
priv = driver->privateData;
if (priv->watch != -1)
virEventRemoveHandle(priv->watch);
udev_monitor = DRV_STATE_UDEV_MONITOR(driver);
if (udev_monitor != NULL) {
udev = udev_monitor_get_udev(udev_monitor);
udev_monitor_unref(udev_monitor);
}
if (udev != NULL)
udev_unref(udev);
virNodeDeviceObjListFree(&driver->devs);
nodeDeviceUnlock();
virMutexDestroy(&driver->lock);
VIR_FREE(driver);
VIR_FREE(priv);
} else {
ret = -1;
}
#if defined __s390__ || defined __s390x_
/* Nothing was initialized, nothing needs to be cleaned up */
#else
/* pci_system_cleanup returns void */
pci_system_cleanup();
#endif
return ret;
}
static void udevEventHandleCallback(int watch ATTRIBUTE_UNUSED,
int fd,
int events ATTRIBUTE_UNUSED,
void *data ATTRIBUTE_UNUSED)
{
struct udev_device *device = NULL;
struct udev_monitor *udev_monitor = DRV_STATE_UDEV_MONITOR(driver);
const char *action = NULL;
int udev_fd = -1;
nodeDeviceLock();
udev_fd = udev_monitor_get_fd(udev_monitor);
if (fd != udev_fd) {
VIR_ERROR(_("File descriptor returned by udev %d does not "
"match node device file descriptor %d"), fd, udev_fd);
goto out;
}
device = udev_monitor_receive_device(udev_monitor);
if (device == NULL) {
VIR_ERROR(_("udev_monitor_receive_device returned NULL"));
goto out;
}
action = udev_device_get_action(device);
VIR_DEBUG("udev action: '%s'", action);
if (STREQ(action, "add") || STREQ(action, "change")) {
udevAddOneDevice(device);
goto out;
}
if (STREQ(action, "remove")) {
udevRemoveOneDevice(device);
goto out;
}
out:
udev_device_unref(device);
nodeDeviceUnlock();
return;
}
/* DMI is intel-compatible specific */
#if defined(__x86_64__) || defined(__i386__) || defined(__amd64__)
static void
udevGetDMIData(union _virNodeDevCapData *data)
{
struct udev *udev = NULL;
struct udev_device *device = NULL;
char *tmp = NULL;
udev = udev_monitor_get_udev(DRV_STATE_UDEV_MONITOR(driver));
device = udev_device_new_from_syspath(udev, DMI_DEVPATH);
if (device == NULL) {
device = udev_device_new_from_syspath(udev, DMI_DEVPATH_FALLBACK);
if (device == NULL) {
VIR_ERROR(_("Failed to get udev device for syspath '%s' or '%s'"),
DMI_DEVPATH, DMI_DEVPATH_FALLBACK);
goto out;
}
}
if (udevGetStringSysfsAttr(device,
"product_name",
&data->system.product_name) == PROPERTY_ERROR) {
goto out;
}
if (udevGetStringSysfsAttr(device,
"sys_vendor",
&data->system.hardware.vendor_name)
== PROPERTY_ERROR) {
goto out;
}
if (udevGetStringSysfsAttr(device,
"product_version",
&data->system.hardware.version)
== PROPERTY_ERROR) {
goto out;
}
if (udevGetStringSysfsAttr(device,
"product_serial",
&data->system.hardware.serial)
== PROPERTY_ERROR) {
goto out;
}
if (virGetHostUUID(data->system.hardware.uuid))
goto out;
if (udevGetStringSysfsAttr(device,
"bios_vendor",
&data->system.firmware.vendor_name)
== PROPERTY_ERROR) {
goto out;
}
if (udevGetStringSysfsAttr(device,
"bios_version",
&data->system.firmware.version)
== PROPERTY_ERROR) {
goto out;
}
if (udevGetStringSysfsAttr(device,
"bios_date",
&data->system.firmware.release_date)
== PROPERTY_ERROR) {
goto out;
}
out:
VIR_FREE(tmp);
if (device != NULL)
udev_device_unref(device);
return;
}
#endif
static int udevSetupSystemDev(void)
{
virNodeDeviceDefPtr def = NULL;
virNodeDeviceObjPtr dev = NULL;
int ret = -1;
if (VIR_ALLOC(def) != 0)
goto out;
if (VIR_STRDUP(def->name, "computer") < 0)
goto out;
if (VIR_ALLOC(def->caps) != 0)
goto out;
#if defined(__x86_64__) || defined(__i386__) || defined(__amd64__)
udevGetDMIData(&def->caps->data);
#endif
dev = virNodeDeviceAssignDef(&driver->devs, def);
if (dev == NULL) {
VIR_ERROR(_("Failed to create device for '%s'"), def->name);
goto out;
}
virNodeDeviceObjUnlock(dev);
ret = 0;
out:
if (ret == -1)
virNodeDeviceDefFree(def);
return ret;
}
static int nodeStateInitialize(bool privileged,
virStateInhibitCallback callback ATTRIBUTE_UNUSED,
void *opaque ATTRIBUTE_UNUSED)
{
udevPrivate *priv = NULL;
struct udev *udev = NULL;
int ret = 0;
#if defined __s390__ || defined __s390x_
/* On s390(x) system there is no PCI bus.
* Therefore there is nothing to initialize here. */
#else
int pciret;
if ((pciret = pci_system_init()) != 0) {
/* Ignore failure as non-root; udev is not as helpful in that
* situation, but a non-privileged user won't benefit much
* from udev in the first place. */
if (errno != ENOENT && (privileged || errno != EACCES)) {
char ebuf[256];
VIR_ERROR(_("Failed to initialize libpciaccess: %s"),
virStrerror(pciret, ebuf, sizeof(ebuf)));
ret = -1;
goto out;
}
}
#endif
if (VIR_ALLOC(priv) < 0) {
ret = -1;
goto out;
}
priv->watch = -1;
priv->privileged = privileged;
if (VIR_ALLOC(driver) < 0) {
VIR_FREE(priv);
ret = -1;
goto out;
}
if (virMutexInit(&driver->lock) < 0) {
VIR_ERROR(_("Failed to initialize mutex for driver"));
VIR_FREE(priv);
VIR_FREE(driver);
ret = -1;
goto out;
}
nodeDeviceLock();
/*
* http://www.kernel.org/pub/linux/utils/kernel/hotplug/libudev/libudev-udev.html#udev-new
*
* indicates no return value other than success, so we don't check
* its return value.
*/
udev = udev_new();
#if HAVE_UDEV_LOGGING
/* cast to get rid of missing-format-attribute warning */
udev_set_log_fn(udev, (udevLogFunctionPtr) udevLogFunction);
#endif
priv->udev_monitor = udev_monitor_new_from_netlink(udev, "udev");
if (priv->udev_monitor == NULL) {
VIR_FREE(priv);
VIR_ERROR(_("udev_monitor_new_from_netlink returned NULL"));
ret = -1;
goto out_unlock;
}
udev_monitor_enable_receiving(priv->udev_monitor);
/* udev can be retrieved from udev_monitor */
driver->privateData = priv;
/* We register the monitor with the event callback so we are
* notified by udev of device changes before we enumerate existing
* devices because libvirt will simply recreate the device if we
* try to register it twice, i.e., if the device appears between
* the time we register the callback and the time we begin
* enumeration. The alternative is to register the callback after
* we enumerate, in which case we will fail to create any devices
* that appear while the enumeration is taking place. */
priv->watch = virEventAddHandle(udev_monitor_get_fd(priv->udev_monitor),
VIR_EVENT_HANDLE_READABLE,
udevEventHandleCallback, NULL, NULL);
if (priv->watch == -1) {
ret = -1;
goto out_unlock;
}
/* Create a fictional 'computer' device to root the device tree. */
if (udevSetupSystemDev() != 0) {
ret = -1;
goto out_unlock;
}
/* Populate with known devices */
if (udevEnumerateDevices(udev) != 0) {
ret = -1;
goto out_unlock;
}
out_unlock:
nodeDeviceUnlock();
out:
if (ret == -1)
nodeStateCleanup();
return ret;
}
static int nodeStateReload(void)
{
return 0;
}
static virNodeDeviceDriver udevNodeDeviceDriver = {
.name = "udev",
.nodeNumOfDevices = nodeNumOfDevices, /* 0.7.3 */
.nodeListDevices = nodeListDevices, /* 0.7.3 */
.connectListAllNodeDevices = nodeConnectListAllNodeDevices, /* 0.10.2 */
.nodeDeviceLookupByName = nodeDeviceLookupByName, /* 0.7.3 */
.nodeDeviceLookupSCSIHostByWWN = nodeDeviceLookupSCSIHostByWWN, /* 1.0.2 */
.nodeDeviceGetXMLDesc = nodeDeviceGetXMLDesc, /* 0.7.3 */
.nodeDeviceGetParent = nodeDeviceGetParent, /* 0.7.3 */
.nodeDeviceNumOfCaps = nodeDeviceNumOfCaps, /* 0.7.3 */
.nodeDeviceListCaps = nodeDeviceListCaps, /* 0.7.3 */
.nodeDeviceCreateXML = nodeDeviceCreateXML, /* 0.7.3 */
.nodeDeviceDestroy = nodeDeviceDestroy, /* 0.7.3 */
};
static virStateDriver udevStateDriver = {
.name = "udev",
.stateInitialize = nodeStateInitialize, /* 0.7.3 */
.stateCleanup = nodeStateCleanup, /* 0.7.3 */
.stateReload = nodeStateReload, /* 0.7.3 */
};
int udevNodeRegister(void)
{
VIR_DEBUG("Registering udev node device backend");
if (virSetSharedNodeDeviceDriver(&udevNodeDeviceDriver) < 0)
return -1;
return virRegisterStateDriver(&udevStateDriver);
}
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