This invalid free results in heap corruption. Some symptoms I saw
because of this were libvirtd crashing and virt-manager hanging
while trying to enumerate devices.

* src/node_device/node_device_driver.c (update_driver_name): The
previous code would write one byte beyond the end of the 4KiB
stack buffer when presented with a symlink value of exactly that
length (very unlikely).  Remove the automatic buffer and use
virFileResolveLink in place of readlink.  Suggested by Daniel Veillard.

src/node_device/node_device_udev.c was using a function available only
on the daemon code, fix this and use the function available globally

* src/node_device/node_device_udev.c: replace use of virEventAddHandleImpl
  by virEventAddHandle

Provides the CDROM label for current media. Only implemented for the
udev backend.

exposes the relationships between physical
and virtual functions on SR IOV capable devices.

Replace free(virBufferContentAndReset()) with virBufferFreeAndReset().
Update documentation and replace all remaining calls to free() with
calls to VIR_FREE(). Also add missing calls to virBufferFreeAndReset()
and virReportOOMError() in OOM error cases.

Fix crash on strdup in that case.

I realized that I inadvertently added a member to the def struct to
contain each device's sysfs path when there was an existing member in the
dev struct for "OS specific path to device metadat, eg sysfs"  Since the
udev backend needs to record the sysfs path while it's in the process of
creating the device, before the dev struct gets allocated, I chose to
remove the member from the dev struct.

* src/conf/node_device_conf.c src/conf/node_device_conf.h
  src/node_device/node_device_driver.c src/node_device/node_device_hal.c
  src/node_device/node_device_udev.c: remove devicePath from the
  structure and use def->sysfs_path instead

* src/node_device/node_device_driver.c: two places where not calling
  virReportOOMError after strdup failure

The HAL driver returns a fatal error code in the case where HAL
is not running. This causes the entire libvirtd daemon to quit
which isn't desirable. Instead it should simply disable the HAL
driver

* src/node_device/node_device_hal.c: Quietly disable HAL if it is
  not running

There is a race condition in HAL driver startup where the callback
can get triggered before we have finished startup. This then causes
a deadlock in the driver.

* src/node_device/node_device_hal.c: RElease driver lock before
  registering DBus callbacks

uses libpciaccess to provide human readable names for PCI vendor and
device IDs
* configure.in: add a requirement for libpciaccess >= 0.10.0
* src/Makefile.am: add the associated compilation flags and link
* src/node_device/node_device_udev.c: lookup the libpciaccess for
  vendor name and product name based on their ids

* configure.in src/Makefile.am: remove the configuration check and
  build instructions
* src/node_device/node_device_devkit.c: removed the module
* src/node_device/node_device_driver.c src/node_device/node_device_driver.h:
  removed references to the old backend

* src/conf/node_device_conf.h src/conf/node_device_conf.c: add specific
  support for SCSI target in node device capabilities
* src/node_device/node_device_udev.c: add some extra detection code
  when handling udev output

* 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

* src/libvirt.c src/lxc/lxc_conf.c src/lxc/lxc_container.c
  src/lxc/lxc_controller.c src/node_device/node_device_hal.c
  src/openvz/openvz_conf.c src/qemu/qemu_driver.c
  src/qemu/qemu_monitor_text.c src/remote/remote_driver.c
  src/storage/storage_backend_disk.c src/storage/storage_driver.c
  src/util/logging.c src/xen/sexpr.c src/xen/xend_internal.c
  src/xen/xm_internal.c: Steve Grubb <sgrubb@redhat.com> sent a code
  review and those are the fixes correcting the problems

The LXC driver was mistakenly returning -1 for lxcStartup()
in scenarios that are not an error. This caused the libvirtd
to quit for unprivileged users. This fixes the return code
of LXC driver, and also adds a "name" field to the virStateDriver
struct and logging to make it easier to find these problems
in the future

* src/driver.h: Add a 'name' field to state driver to allow
  easy identification during failures
* src/libvirt.c: Log name of failed driver for virStateInit
  failures
* src/lxc/lxc_driver.c: Don't return a failure code for
  lxcStartup() if LXC is not available on this host, simply
  disable the driver.
* src/network/bridge_driver.c, src/node_device/node_device_devkit.c,
  src/node_device/node_device_hal.c, src/opennebula/one_driver.c,
  src/qemu/qemu_driver.c, src/remote/remote_driver.c,
  src/secret/secret_driver.c, src/storage/storage_driver.c,
  src/uml/uml_driver.c, src/xen/xen_driver.c: Fill in name
  field in virStateDriver struct

These will be used by the test driver, so move them to a shareable space.

Certain error paths won't unlock the node device object.

Will be used by test driver node device implementation.
Signed-off-by: NCole Robinson <crobinso@redhat.com>

Signed-off-by: NCole Robinson <crobinso@redhat.com>

* daemon/qemud.c, src/Makefile.am: Update for changed paths
* src/node_device*.{h,c}: Move to src/node_device/
* src/storage/storage_backend.c: Remove bogus import of node_device.c