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Implement a node device backend using libudev

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* configure.in: add new --with-udev, disabled by default, and requiring
  libudev > 145
* src/node_device/node_device_udev.c src/node_device/node_device_udev.h:
  the new node device backend
* src/node_device/node_device_linux_sysfs.c: moved node_device_hal_linux.c
  to a better file name
* src/conf/node_device_conf.c src/conf/node_device_conf.h: add a couple
  of fields in node device definitions, and an API to look them up,
  remove a couple of unused fields from previous patch.
* src/node_device/node_device_driver.c src/node_device/node_device_driver.h:
  plug the new driver
* po/POTFILES.in src/Makefile.am src/libvirt_private.syms: add the new
  files and symbols
* src/util/util.h src/util/util.c: add a new convenience macro
  virBuildPath and virBuildPathInternal() function
This commit is contained in:
David Allan 2009-11-12 22:48:24 +01:00 committed by Daniel Veillard
parent fe2af45bb2
commit 3ad6dcf3dc
15 changed files with 1711 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

47
configure.in
View File

@ -1654,7 +1654,7 @@ test "$enable_shared" = no && lt_cv_objdir=.
LV_LIBTOOL_OBJDIR=${lt_cv_objdir-.}
AC_SUBST([LV_LIBTOOL_OBJDIR])
dnl HAL or DeviceKit library for host device enumeration
dnl HAL, DeviceKit, or libudev library for host device enumeration
HAL_REQUIRED=0.0
HAL_CFLAGS=
HAL_LIBS=
@ -1748,8 +1748,46 @@ AM_CONDITIONAL([HAVE_DEVKIT], [test "x$with_devkit" = "xyes"])
AC_SUBST([DEVKIT_CFLAGS])
AC_SUBST([DEVKIT_LIBS])
UDEV_REQUIRED=145
UDEV_CFLAGS=
UDEV_LIBS=
AC_ARG_WITH([udev],
[ --with-udev use libudev for host device enumeration],
[],
[with_udev=check])
if test "$with_libvirtd" = "no" ; then
with_udev=no
fi
if test "x$with_udev" = "xyes" -o "x$with_udev" = "xcheck"; then
PKG_CHECK_MODULES(UDEV, libudev >= $UDEV_REQUIRED,
[with_udev=yes], [
if test "x$with_udev" = "xcheck" ; then
with_udev=no
else
AC_MSG_ERROR(
[You must install libudev-devel >= $UDEV_REQUIRED to compile libvirt])
fi
])
if test "x$with_udev" = "xyes" ; then
AC_DEFINE_UNQUOTED([HAVE_UDEV], 1,
[use UDEV for host device enumeration])
old_CFLAGS=$CFLAGS
old_LDFLAGS=$LDFLAGS
CFLAGS="$CFLAGS $UDEV_CFLAGS"
LDFLAGS="$LDFLAGS $UDEV_LIBS"
AC_CHECK_FUNCS([udev_new],,[with_udev=no])
CFLAGS="$old_CFLAGS"
LDFLAGS="$old_LDFLAGS"
fi
fi
AM_CONDITIONAL([HAVE_UDEV], [test "x$with_udev" = "xyes"])
AC_SUBST([UDEV_CFLAGS])
AC_SUBST([UDEV_LIBS])
with_nodedev=no;
if test "$with_devkit" = "yes" -o "$with_hal" = "yes";
if test "$with_devkit" = "yes" -o "$with_hal" = "yes" -o "$with_udev" = "yes";
then
with_nodedev=yes
AC_DEFINE_UNQUOTED([WITH_NODE_DEVICES], 1, [with node device driver])
@ -1914,6 +1952,11 @@ AC_MSG_NOTICE([ devkit: $DEVKIT_CFLAGS $DEVKIT_LIBS])
else
AC_MSG_NOTICE([ devkit: no])
fi
if test "$with_udev" = "yes" ; then
AC_MSG_NOTICE([ udev: $UDEV_CFLAGS $UDEV_LIBS])
else
AC_MSG_NOTICE([ udev: no])
fi
if test "$with_netcf" = "yes" ; then
AC_MSG_NOTICE([ netcf: $NETCF_CFLAGS $NETCF_LIBS])
else

3
daemon/libvirtd.c
View File

@ -877,8 +877,7 @@ static struct qemud_server *qemudInitialize(void) {
#ifdef WITH_STORAGE_DIR
storageRegister();
#endif
#if defined(WITH_NODE_DEVICES) && \
(defined(HAVE_HAL) || defined(HAVE_DEVKIT))
#if defined(WITH_NODE_DEVICES)
nodedevRegister();
#endif
secretRegister();

3
po/POTFILES.in
View File

@ -17,7 +17,8 @@ src/lxc/lxc_controller.c
src/lxc/lxc_driver.c
src/network/bridge_driver.c
src/node_device/node_device_driver.c
src/node_device/node_device_hal_linux.c
src/node_device/node_device_linux_sysfs.c
src/node_device/node_device_udev.c
src/nodeinfo.c
src/opennebula/one_conf.c
src/opennebula/one_driver.c

16
src/Makefile.am
View File

@ -259,16 +259,20 @@ SECURITY_DRIVER_APPARMOR_SOURCES = \
NODE_DEVICE_DRIVER_SOURCES = \
node_device/node_device_driver.c node_device/node_device_driver.h
node_device/node_device_driver.c \
node_device/node_device_driver.h \
node_device/node_device_linux_sysfs.c
NODE_DEVICE_DRIVER_HAL_SOURCES = \
node_device/node_device_hal.c \
node_device/node_device_hal.h \
node_device/node_device_hal_linux.c
node_device/node_device_hal.h
NODE_DEVICE_DRIVER_DEVKIT_SOURCES = \
node_device/node_device_devkit.c
NODE_DEVICE_DRIVER_UDEV_SOURCES = \
node_device/node_device_udev.c
#########################
#
@ -647,6 +651,11 @@ libvirt_driver_nodedev_la_SOURCES += $(NODE_DEVICE_DRIVER_DEVKIT_SOURCES)
libvirt_driver_nodedev_la_CFLAGS += $(DEVKIT_CFLAGS)
libvirt_driver_nodedev_la_LDFLAGS += $(DEVKIT_LIBS)
endif
if HAVE_UDEV
libvirt_driver_nodedev_la_SOURCES += $(NODE_DEVICE_DRIVER_UDEV_SOURCES)
libvirt_driver_nodedev_la_CFLAGS += $(UDEV_CFLAGS)
libvirt_driver_nodedev_la_LDFLAGS += $(UDEV_LIBS)
endif
if WITH_DRIVER_MODULES
libvirt_driver_nodedev_la_LDFLAGS += -module -avoid-version
@ -696,6 +705,7 @@ EXTRA_DIST += \
$(NODE_DEVICE_DRIVER_SOURCES) \
$(NODE_DEVICE_DRIVER_HAL_SOURCES) \
$(NODE_DEVICE_DRIVER_DEVKIT_SOURCES) \
$(NODE_DEVICE_DRIVER_UDEV_SOURCES) \
$(SECURITY_DRIVER_SELINUX_SOURCES) \
$(SECURITY_DRIVER_APPARMOR_SOURCES) \
$(SECRET_DRIVER_SOURCES) \

46
src/conf/node_device_conf.c
View File

@ -91,6 +91,26 @@ int virNodeDeviceHasCap(const virNodeDeviceObjPtr dev, const char *cap)
return 0;
}
virNodeDeviceObjPtr
virNodeDeviceFindBySysfsPath(const virNodeDeviceObjListPtr devs,
const char *sysfs_path)
{
unsigned int i;
for (i = 0; i < devs->count; i++) {
virNodeDeviceObjLock(devs->objs[i]);
if ((devs->objs[i]->def->sysfs_path != NULL) &&
(STREQ(devs->objs[i]->def->sysfs_path, sysfs_path))) {
return devs->objs[i];
}
virNodeDeviceObjUnlock(devs->objs[i]);
}
return NULL;
}
virNodeDeviceObjPtr virNodeDeviceFindByName(const virNodeDeviceObjListPtr devs,
const char *name)
{
@ -117,6 +137,8 @@ void virNodeDeviceDefFree(virNodeDeviceDefPtr def)
VIR_FREE(def->name);
VIR_FREE(def->parent);
VIR_FREE(def->driver);
VIR_FREE(def->sysfs_path);
VIR_FREE(def->parent_sysfs_path);
caps = def->caps;
while (caps) {
@ -228,9 +250,17 @@ char *virNodeDeviceDefFormat(virConnectPtr conn,
virBufferAddLit(&buf, "<device>\n");
virBufferEscapeString(&buf, " <name>%s</name>\n", def->name);
if (def->parent)
if (def->sysfs_path != NULL) {
virBufferEscapeString(&buf, " <sysfs_path>%s</sysfs_path>\n",
def->sysfs_path);
}
if (def->parent) {
virBufferEscapeString(&buf, " <parent>%s</parent>\n", def->parent);
}
if (def->parent_sysfs_path != NULL) {
virBufferEscapeString(&buf, " <parent_sysfs_path>%s</parent_sysfs_path>\n",
def->parent_sysfs_path);
}
if (def->driver) {
virBufferAddLit(&buf, " <driver>\n");
virBufferEscapeString(&buf, " <name>%s</name>\n", def->driver);
@ -248,12 +278,6 @@ char *virNodeDeviceDefFormat(virConnectPtr conn,
if (data->system.product_name)
virBufferEscapeString(&buf, " <product>%s</product>\n",
data->system.product_name);
if (data->system.dmi_devpath)
virBufferEscapeString(&buf, " <dmi_devpath>%s</dmi_devpath>\n",
data->system.dmi_devpath);
if (data->system.description)
virBufferEscapeString(&buf, " <description>%s</description>\n",
data->system.description);
virBufferAddLit(&buf, " <hardware>\n");
if (data->system.hardware.vendor_name)
virBufferEscapeString(&buf, " <vendor>%s</vendor>\n",
@ -331,9 +355,6 @@ char *virNodeDeviceDefFormat(virConnectPtr conn,
data->usb_if.subclass);
virBufferVSprintf(&buf, " <protocol>%d</protocol>\n",
data->usb_if.protocol);
if (data->usb_if.interface_name)
virBufferVSprintf(&buf, " <interface_name>%s</interface_name>\n",
data->usb_if.interface_name);
if (data->usb_if.description)
virBufferVSprintf(&buf, " <description>%s</description>\n",
data->usb_if.description);
@ -1340,8 +1361,6 @@ void virNodeDevCapsDefFree(virNodeDevCapsDefPtr caps)
switch (caps->type) {
case VIR_NODE_DEV_CAP_SYSTEM:
VIR_FREE(data->system.product_name);
VIR_FREE(data->system.dmi_devpath);
VIR_FREE(data->system.description);
VIR_FREE(data->system.hardware.vendor_name);
VIR_FREE(data->system.hardware.version);
VIR_FREE(data->system.hardware.serial);
@ -1358,7 +1377,6 @@ void virNodeDevCapsDefFree(virNodeDevCapsDefPtr caps)
VIR_FREE(data->usb_dev.vendor_name);
break;
case VIR_NODE_DEV_CAP_USB_INTERFACE:
VIR_FREE(data->usb_if.interface_name);
VIR_FREE(data->usb_if.description);
break;
case VIR_NODE_DEV_CAP_NET:

8
src/conf/node_device_conf.h
View File

@ -82,8 +82,6 @@ struct _virNodeDevCapsDef {
union _virNodeDevCapData {
struct {
char *product_name;
char *description;
char *dmi_devpath;
struct {
char *vendor_name;
char *version;
@ -120,7 +118,6 @@ struct _virNodeDevCapsDef {
unsigned _class; /* "class" is reserved in C */
unsigned subclass;
unsigned protocol;
char *interface_name;
char *description;
} usb_if;
struct {
@ -164,7 +161,9 @@ typedef struct _virNodeDeviceDef virNodeDeviceDef;
typedef virNodeDeviceDef *virNodeDeviceDefPtr;
struct _virNodeDeviceDef {
char *name; /* device name (unique on node) */
char *sysfs_path; /* udev name/sysfs path */
char *parent; /* optional parent device name */
char *parent_sysfs_path; /* udev parent name/sysfs path */
char *driver; /* optional driver name */
virNodeDevCapsDefPtr caps; /* optional device capabilities */
};
@ -206,6 +205,9 @@ int virNodeDeviceHasCap(const virNodeDeviceObjPtr dev, const char *cap);
virNodeDeviceObjPtr virNodeDeviceFindByName(const virNodeDeviceObjListPtr devs,
const char *name);
virNodeDeviceObjPtr
virNodeDeviceFindBySysfsPath(const virNodeDeviceObjListPtr devs,
const char *sysfs_path);
virNodeDeviceObjPtr virNodeDeviceAssignDef(virConnectPtr conn,
virNodeDeviceObjListPtr devs,

1
src/libvirt_private.syms
View File

@ -341,6 +341,7 @@ virNodeDeviceHasCap;
virNodeDeviceObjRemove;
virNodeDevCapTypeToString;
virNodeDeviceFindByName;
virNodeDeviceFindBySysfsPath;
virNodeDeviceObjListFree;
virNodeDeviceDefFree;
virNodeDevCapsDefFree;

12
src/node_device/node_device_driver.c
View File

@ -70,7 +70,10 @@ static int update_caps(virNodeDeviceObjPtr dev)
}
#ifdef __linux__
#if defined (__linux__) && defined (HAVE_HAL)
/* Under libudev changes to the driver name should be picked up as
* "change" events, so we don't call update driver name unless we're
* using the HAL backend. */
static int update_driver_name(virConnectPtr conn,
virNodeDeviceObjPtr dev)
{
@ -658,10 +661,10 @@ void registerCommonNodeFuncs(virDeviceMonitorPtr driver)
int nodedevRegister(void) {
#if defined(HAVE_HAL) && defined(HAVE_DEVKIT)
#if defined(HAVE_HAL) && defined(HAVE_UDEV)
/* Register only one of these two - they conflict */
if (halNodeRegister() == -1)
return devkitNodeRegister();
return udevNodeRegister();
return 0;
#else
#ifdef HAVE_HAL
@ -670,5 +673,8 @@ int nodedevRegister(void) {
#ifdef HAVE_DEVKIT
return devkitNodeRegister();
#endif
#ifdef HAVE_UDEV
return udevNodeRegister();
#endif
#endif
}

22
src/node_device/node_device_driver.h
View File

@ -45,6 +45,9 @@ int halNodeRegister(void);
#ifdef HAVE_DEVKIT
int devkitNodeRegister(void);
#endif
#ifdef HAVE_UDEV
int udevNodeRegister(void);
#endif
void nodeDeviceLock(virDeviceMonitorStatePtr driver);
void nodeDeviceUnlock(virDeviceMonitorStatePtr driver);
@ -53,4 +56,23 @@ void registerCommonNodeFuncs(virDeviceMonitorPtr mon);
int nodedevRegister(void);
#ifdef __linux__
#define check_fc_host(d) check_fc_host_linux(d)
int check_fc_host_linux(union _virNodeDevCapData *d);
#define check_vport_capable(d) check_vport_capable_linux(d)
int check_vport_capable_linux(union _virNodeDevCapData *d);
#define read_wwn(host, file, wwn) read_wwn_linux(host, file, wwn)
int read_wwn_linux(int host, const char *file, char **wwn);
#else /* __linux__ */
#define check_fc_host(d)
#define check_vport_capable(d)
#define read_wwn(host, file, wwn)
#endif /* __linux__ */
#endif /* __VIR_NODE_DEVICE_H__ */

19
src/node_device/node_device_hal.h
View File

@ -22,23 +22,4 @@
#ifndef __VIR_NODE_DEVICE_HAL_H__
#define __VIR_NODE_DEVICE_HAL_H__
#ifdef __linux__
#define check_fc_host(d) check_fc_host_linux(d)
int check_fc_host_linux(union _virNodeDevCapData *d);
#define check_vport_capable(d) check_vport_capable_linux(d)
int check_vport_capable_linux(union _virNodeDevCapData *d);
#define read_wwn(host, file, wwn) read_wwn_linux(host, file, wwn)
int read_wwn_linux(int host, const char *file, char **wwn);
#else /* __linux__ */
#define check_fc_host(d)
#define check_vport_capable(d)
#define read_wwn(host, file, wwn)
#endif /* __linux__ */
#endif /* __VIR_NODE_DEVICE_HAL_H__ */

0
src/node_device/node_device_hal_linux.c → src/node_device/node_device_linux_sysfs.c
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1519
src/node_device/node_device_udev.c Normal file
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File diff suppressed because it is too large Load Diff

31
src/node_device/node_device_udev.h Normal file
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@ -0,0 +1,31 @@
/*
* node_device_udev.h: node device enumeration - libudev implementation
*
* Copyright (C) 2009 Red Hat
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Author: Dave Allan <dallan@redhat.com>
*/
#include <libudev.h>
#include <stdint.h>
#define SYSFS_DATA_SIZE 4096
#define DRV_STATE_UDEV_MONITOR(ds) ((struct udev_monitor *)((ds)->privateData))
#define DMI_DEVPATH "/sys/devices/virtual/dmi/id"
#define PROPERTY_FOUND 0
#define PROPERTY_MISSING 1
#define PROPERTY_ERROR -1

28
src/util/util.c
View File

@ -2128,3 +2128,31 @@ void virFileWaitForDevices(virConnectPtr conn)
void virFileWaitForDevices(virConnectPtr conn ATTRIBUTE_UNUSED) {}
#endif
#endif
int virBuildPathInternal(char **path, ...)
{
char *path_component = NULL;
virBuffer buf = VIR_BUFFER_INITIALIZER;
va_list ap;
int ret = 0;
va_start(ap, *path);
path_component = va_arg(ap, char *);
virBufferAdd(&buf, path_component, -1);
while ((path_component = va_arg(ap, char *)) != NULL)
{
virBufferAddChar(&buf, '/');
virBufferAdd(&buf, path_component, -1);
}
va_end(ap);
*path = virBufferContentAndReset(&buf);
if (*path == NULL) {
ret = -1;
}
return ret;
}

3
src/util/util.h
View File

@ -248,4 +248,7 @@ char *virFileFindMountPoint(const char *type);
void virFileWaitForDevices(virConnectPtr conn);
#define virBuildPath(path, ...) virBuildPathInternal(path, __VA_ARGS__, NULL)
int virBuildPathInternal(char **path, ...) ATTRIBUTE_SENTINEL;
#endif /* __VIR_UTIL_H__ */