virsh: Fix and clarify the --title flag for the list command in man page
Implement virHashRemoveAll function

Implement function to remove all entries of a hash table.
Support for atomic operations on integers

For threading support, add atomic add and sub operations working on
integers. Base this on locking support provided by virMutex.
nwfilter: Fix support for trusted DHCP servers

Fix the support for trusted DHCP server in the ebtables code's
hard-coded function applying DHCP only filtering rules:
Rather than using a char * use the more flexible
virNWFilterVarValuePtr that contains the trusted DHCP server(s)
IP address. Process all entries.

Since all callers so far provided NULL as parameter, no changes
are necessary in any other code.
The policy kit and HAL node device drivers both require a
DBus connection. The HAL device code further requires that
the DBus connection is integrated with the event loop and
provides such glue logic itself.

The forthcoming FirewallD integration also requires a
dbus connection with event loop integration. Thus we need
to pull the current event loop glue out of the HAL driver.

Thus we create src/util/virdbus.{c,h} files. This contains
just one method virDBusGetSystemBus() which obtains a handle
to the single shared system bus instance, with event glue
automagically setup.
virsh: avoid uninitialized memory usage

Detected by valgrind, via Alex Jia.  Caused by imcomplete
copy-and-paste from vshWatchJob in commit 3b96a892.

* tools/virsh.c (cmdBlockPull): fix uninitialized memory usage.

* How to reproduce?
$ qemu-img create /var/lib/libvirt/images/test 1M
$ cat > /tmp/test.xml <<EOF
<domain type='qemu'>
  <name>test</name>
  <memory>219200</memory>
  <vcpu>1</vcpu>
  <os>
    <type arch='x86_64'>hvm</type>
    <boot dev='hd'/>
  </os>
  <devices>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/test'/>
      <target dev='vda' bus='virtio'/>
    </disk>
    <input type='mouse' bus='ps2'/>
    <graphics type='spice' autoport='yes' listen='0.0.0.0'/>
  </devices>
</domain>
EOF
$ virsh define /tmp/test.xml
$ valgrind -v virsh blockpull test /var/lib/libvirt/images/test --wait

actual result:

==10906== 1 errors in context 1 of 1:
==10906== Syscall param rt_sigaction(act->sa_flags) points to uninitialised byte(s)
==10906==    at 0x39CF80F5BE: __libc_sigaction (sigaction.c:67)
==10906==    by 0x43016C: cmdBlockPull (virsh.c:7638)
==10906==    by 0x4150D4: vshCommandRun (virsh.c:18574)
==10906==    by 0x425E73: main (virsh.c:20178)
==10906==  Address 0x7fefffae8 is on thread 1's stack
build: fix fresh checkout on RHEL5

Building a fresh checkout on RHEL 5 has been broken since commit
29db7a00, due to a gnulib regression in the bootstrap script
(incremental builds from a checkout earlier than that point were
okay, though).

* .gnulib: Update to latest, for bootstrap fixes.
* bootstrap: Resync from gnulib.
* gnulib/local/top/maint.mk.diff: Drop patch that was added
upstream in the meantime.
build: avoid type-punning in vbox

Commit 78345c68 makes at least gcc 4.1.2 on RHEL 5 complain:

cc1: warnings being treated as errors
In file included from vbox/vbox_V4_0.c:13:
vbox/vbox_tmpl.c: In function 'vboxDomainUndefineFlags':
vbox/vbox_tmpl.c:5298: warning: dereferencing type-punned pointer will break strict-aliasing rules [-Wstrict-aliasing]

* src/vbox/vbox_tmpl.c (vboxDomainUndefineFlags): Use union to
avoid compiler warning.
virsh: avoid strtol

We were forgetting to check errno for overflow.

* tools/virsh.c (get_integer_keycode, vshCommandOptInt)
(vshCommandOptUInt, vshCommandOptUL, vshCommandOptLongLong)
(vshCommandOptULongLong): Rewrite to be safer.
conf: tighten up XML integer parsing

https://bugzilla.redhat.com/show_bug.cgi?id=617711 reported that
even with my recent patched to allow <memory unit='G'>1</memory>,
people can still get away with trying <memory>1G</memory> and
silently get <memory unit='KiB'>1</memory> instead.  While
virt-xml-validate catches the error, our C parser did not.

Not to mention that it's always fun to fix bugs while reducing
lines of code.  :)

* src/conf/domain_conf.c (virDomainParseMemory): Check for parse error.
(virDomainDefParseXML): Avoid strtoll.
* src/conf/storage_conf.c (virStorageDefParsePerms): Likewise.
* src/util/xml.c (virXPathLongBase, virXPathULongBase)
(virXPathULongLong, virXPathLongLong): Likewise.
build: avoid strtol and strtod

Ensure we don't introduce any more lousy integer parsing in new
code, while avoiding a scrub-down of existing legacy code.

Note that we also need to enable sc_prohibit_atoi_atof (see cfg.mk
local-checks-to-skip) before we are bulletproof, but that also
entails scrubbing I'm not ready to do at the moment.

* src/util/util.c (virStrToLong_i, virStrToLong_ui)
(virStrToLong_l, virStrToLong_ul, virStrToLong_ll)
(virStrToLong_ull, virStrToDouble): Mark exemptions.
* src/util/virmacaddr.c (virMacAddrParse): Likewise.
* cfg.mk (sc_prohibit_strtol): New syntax check.
(exclude_file_name_regexp--sc_prohibit_strtol): Ignore files that
I'm not willing to fix yet.
(local-checks-to-skip): Re-enable sc_prohibit_atoi_atof.
conf: remove redundant ()

I almost copied-and-pasted some redundant () into my new code,
and figured a general cleanup prereq patch would be better instead.

No semantic change.

* src/conf/domain_conf.c (virDomainLeaseDefParseXML)
(virDomainDiskDefParseXML, virDomainFSDefParseXML)
(virDomainActualNetDefParseXML, virDomainNetDefParseXML)
(virDomainGraphicsDefParseXML, virDomainVideoAccelDefParseXML)
(virDomainVideoDefParseXML, virDomainHostdevFind)
(virDomainControllerInsertPreAlloced, virDomainDefParseXML)
(virDomainObjParseXML, virDomainCpuSetFormat)
(virDomainCpuSetParse, virDomainDiskDefFormat)
(virDomainActualNetDefFormat, virDomainNetDefFormat)
(virDomainTimerDefFormat, virDomainGraphicsListenDefFormat)
(virDomainDefFormatInternal, virDomainNetGetActualHostdev)
(virDomainNetGetActualBandwidth, virDomainGraphicsGetListen):
Reduce extra ().
virnetserver: handle sigaction correctly

POSIX says that sa_sigaction is only safe to use if sa_flags
includes SA_SIGINFO; conversely, sa_handler is only safe to
use when flags excludes that bit.  Gnulib doesn't guarantee
an implementation of SA_SIGINFO, but does guarantee that
if SA_SIGINFO is undefined, we can safely define it to 0 as
long as we don't dereference the 2nd or 3rd argument of
any handler otherwise registered via sa_sigaction.

Based on a report by Wen Congyang.

* src/rpc/virnetserver.c (SA_SIGINFO): Stub for mingw.
(virNetServerSignalHandler): Avoid bogus dereference.
(virNetServerFatalSignal, virNetServerNew): Set flags properly.
(virNetServerAddSignalHandler): Drop unneeded #ifdef.
openvz: wire up getHostname
storage: Allow multiple hosts for a storage pool

The current storage pools for NFS and iSCSI only require one host to
connect to. Future storage pools like RBD and Sheepdog will require
multiple hosts.

This patch allows multiple source hosts and rewrites the current
storage drivers.
storage backend: Add RBD (RADOS Block Device) support

This patch adds support for a new storage backend with RBD support.

RBD is the RADOS Block Device and is part of the Ceph distributed storage system.

It comes in two flavours: Qemu-RBD and Kernel RBD, this storage backend only supports
Qemu-RBD, thus limiting the use of this storage driver to Qemu only.

To function this backend relies on librbd and librados being present on the local system.

The backend also supports Cephx authentication for safe authentication with the Ceph cluster.

For storing credentials it uses the build-in secret mechanism of libvirt.

Signed-off-by: Wido den Hollander <wido@widodh.nl>