Matthias Bolte [Tue, 22 Dec 2009 13:50:50 +0000 (14:50 +0100)]
The secret driver is stateful, link it directly to libvirtd
All other stateful drivers are linked directly to libvirtd
instead of libvirt.so. Link the secret driver to libvirtd too.
* daemon/Makefile.am: link the secret driver to libvirtd
* daemon/libvirtd.c: add #ifdef WITH_SECRETS blocks
* src/Makefile.am: don't link the secret driver to libvirt.so
* src/libvirt_private.syms: remove the secretRegister symbol
Daniel Veillard [Tue, 22 Dec 2009 16:44:03 +0000 (17:44 +0100)]
convert missing server entry points into unsupported errors
If using a remote access, sometimes an RPC entry point is not
available, and currently we just end up with a raw:
error: unknown procedure: xxx
error, while this should be more cleanly reported as an unsupported
entry point like for local access
* src/remote/remote_driver.c: convert missing remote entry points into
the unsupported feature error
Olivier Fourdan [Tue, 22 Dec 2009 15:49:06 +0000 (16:49 +0100)]
fix some error report when on remote access
When querying about a domain from 0.3.3 (or RHEL 5.3) domain located
on a 0.6.3 (RHEL-5) machine, the errors are not properly reported.
This patch from Olivier Fourdan <ofourdan@redhat.com> , slightly
modified to not change the semantic when the domain os details cannot
be provided
* src/xen/proxy_internal.c src/xen/xen_hypervisor.c: add some missing
error reports
Matthias Bolte [Tue, 22 Dec 2009 02:06:57 +0000 (03:06 +0100)]
Fix undefined reference to 'close_used_without_including_unistd_h'
Found while trying to cross-compile libvirt on Fedora 12 for Windows.
gnulib redefines 'close' to 'close_used_without_including_unistd_h'
in sys/socket.h if winsock2.h is present and unistd.h has not been
included before sys/socket.h. Reorder some includes to fix this.
Matthias Bolte [Mon, 21 Dec 2009 17:58:09 +0000 (18:58 +0100)]
Fix configure check for SASL
The option --with-sasl defaults to 'check', but an inverted test logic
lets the SASL check fail with an error instead of disabling SASL.
Fix the test logic so SASL support gets disabled if SASL is missing and
--with-sasl is set to check.
Matthias Bolte [Mon, 21 Dec 2009 17:47:12 +0000 (18:47 +0100)]
Fix GnuTLS pkg-config check
The testlogic for $PKG_CONFIG was inverted, checking for an empty string
before using PKG_CHECK_MODULES. Use -x instead of -z and add an else branch
to the if checking for $GNUTLS_FOUND = no to add -lgcrypt in case the
GnuTLS libraries are detected by pkg-config.
Disable JSON mode monitor until QEMU is more mature
* src/qemu/qemu_conf.h: Remove QEMU_CMD_FLAG_0_12 and just leave
the lone JSON flag
* src/qemu/qemu_conf.c: Enable JSON on QEMU 0.13 or later, but
leave it disabled for now
Chris Lalancette [Tue, 22 Dec 2009 09:53:51 +0000 (10:53 +0100)]
Make Xen VT-d PCI attach/detach work
The Xen code for making HVM VT-d PCI passthrough attach and detach
wasn't working properly:
1) In xenDaemonAttachDevice(), we were always trying to reconfigure
a PCI passthrough device, even the first time we added it. This was
because the code in virDomainXMLDevID() was not checking xenstore for
the existence of the device, and always returning 0 (meaning that
the device already existed).
2) In xenDaemonDetachDevice(), we were trying to use "device_destroy"
to detach a PCI device. While you would think that is the right
method to call, it's actually wrong for PCI devices. In particular,
in upstream Xen (and soon in RHEL-5 Xen), device_configure is actually
used to destroy a PCI device.
To fix the attach
problem I add a lookup into xenstore to see if the device we are
trying to attach already exists. To fix the detach problem I change
it so that for PCI detach (only), we use device_configure with the
appropriate sxpr to do the detachment.
* src/xen/xend_internal.c: don't use device_destroy for PCI devices
and fix the other issues.
* src/xen/xs_internal.c src/xen/xs_internal.h: add
xenStoreDomainGetPCIID()
The XML XPath for detecting JSON in the running VM statefile was
wrong causing all VMs to get JSON mode enabled at libvirtd restart.
In addition if a VM was running a JSON enabled QEMU once, and then
altered to point to a non-JSON enabled QEMU later the 'monJSON'
flag would not get reset to 0.
* src/qemu/qemu_driver.c: Fix setting/detection of JSON mode
The code for connecting to a server tries each socket in turn
until it finds one that connects. Unfortunately for TLS sockets
if it connected, but failed TLS handshake it would treat that
as a failure to connect, and try the next socket. This is bad,
it should have reported the TLS failure immediately.
$ virsh -c qemu://somehost.com/system
error: unable to connect to libvirtd at 'somehost.com': Invalid argument
error: failed to connect to the hypervisor
$ ./tools/virsh -c qemu://somehost.com/system
error: server certificate failed validation: The certificate hasn't got a known issuer.
error: failed to connect to the hypervisor
* src/remote/remote_driver.c: Stop trying to connect if the
TLS handshake fails
Adam Litke [Sun, 20 Dec 2009 12:48:37 +0000 (13:48 +0100)]
python: Add python bindings for virDomainMemoryStats
Enable virDomainMemoryStats in the python API. dom.memoryStats() will return a
dictionary containing the supported statistics. A dictionary is required
because the meaining of each quantity cannot be inferred from its index in a
list.
* python/generator.py: reenable bindings for this entry point
* python/libvirt-override-api.xml python/libvirt-override.c: the
generator can't handle this new function, add the new binding,
and the XML description
Adam Litke [Sun, 20 Dec 2009 12:46:24 +0000 (13:46 +0100)]
Add a new command dommemstats for virDomainMemoryStats
Define a new command 'dommemstats' to report domain memory statistics. The
output format is inspired by 'domblkstat' and 'domifstat' and consists of
tag/value pairs, one per line. The command can complete successfully and
print no output if virDomainMemoryStats is supported by the driver, but not
the guest operating system.
Adam Litke [Sun, 20 Dec 2009 12:43:19 +0000 (13:43 +0100)]
Add domainMemoryStats support to remote driver
Use a dynamically sized xdr_array to pass memory stats on the wire. This
supports the addition of future memory stats and reduces the message size
since only supported statistics are returned.
* src/remote/remote_protocol.x: provide defines for the new entry point
* src/remote/remote_driver.c daemon/remote.c: implement the client and
server side
* daemon/remote_dispatch_args.h daemon/remote_dispatch_prototypes.h
daemon/remote_dispatch_ret.h daemon/remote_dispatch_table.h
src/remote/remote_protocol.c src/remote/remote_protocol.h: generated
stubs
Adam Litke [Sun, 20 Dec 2009 12:36:28 +0000 (13:36 +0100)]
Implements domainMemStats in the qemu driver
Support for memory statistics reporting is accepted for qemu inclusion.
Statistics are reported via the monitor command 'info balloon' as a comma
seprated list:
(qemu) info balloon
balloon: actual=1024,mem_swapped_in=0,mem_swapped_out=0,major_page_faults=88,minor_page_faults=105535,free_mem=1017065472,total_mem=1045229568
Libvirt, qemu, and the guest operating system may support a subset of the
statistics defined by the virtio spec. Thus, only statistics recognized by
components will be reported.
* src/qemu/qemu_driver.c src/qemu/qemu_monitor_text.[ch]: implement the
new entry point by using info balloon monitor command
Adam Litke [Sun, 20 Dec 2009 12:28:42 +0000 (13:28 +0100)]
Add new API virDomainMemoryStats to header and drivers
Set up the types for the domainMemoryStats function and insert it into the
virDriver structure definition. Because of static initializers, update
every driver and set the new field to NULL.
* include/libvirt/libvirt.h.in: new API
* src/driver.h src/*/*_driver.c src/vbox/vbox_tmpl.c: add the new
entry to the driver structure
* python/generator.py: fix compiler errors, the actual python binding is
implemented later
Matthias Bolte [Sat, 12 Dec 2009 19:51:35 +0000 (20:51 +0100)]
esx: Destroy virtual machine on a vCenter if available
If a virtual machine is destroyed on a ESX server then immediately
undefining this virtual machine on a vCenter may fail, because the
vCenter has not been informed about the status change yet. Therefore,
destroy a virtual machine on a vCenter if available, so the vCenter
is up-to-date when the virtual machine should be undefined.
Matthias Bolte [Sun, 6 Dec 2009 23:59:56 +0000 (00:59 +0100)]
esx: Undefine virtual machine on a vCenter if available
Undefining a virtual machine on an ESX server leaves a orphan on the
vCenter behind. So undefine a virtual machine on a vCenter if available
to fix this problem.
Matthias Bolte [Wed, 18 Nov 2009 23:08:13 +0000 (00:08 +0100)]
esx: Extend vCenter query parameter
If an ESX host is managed by a vCenter, it knows the IP address of the
vCenter. Setting the vCenter query parameter to * allows to connect to the
vCenter known to an ESX host without the need to specify its IP address
or hostname explicitly.
Matthias Bolte [Wed, 18 Nov 2009 00:03:31 +0000 (01:03 +0100)]
esx: Improve domain lookup by UUID
esxDomainLookupByUUID() and esxDomainIsActive() lookup a domain by asking
ESX for all known domains and searching manually for the one with the
matching UUID. This is inefficient. The VI API allows to lookup by UUID
directly: FindByUuid().
* src/esx/esx_driver.c: change esxDomainLookupByUUID() and esxDomainIsActive()
to use esxVI_LookupVirtualMachineByUuid(), also reorder some functions to
keep them in sync with the driver struct
Matthias Bolte [Sun, 15 Nov 2009 21:22:47 +0000 (22:22 +0100)]
esx: Add automatic question handling
Questions can block tasks, to handle them automatically the driver can answers
them with the default answer. The auto_answer query parameter allows to enable
this automatic question handling.
* src/esx/README: add a detailed explanation for automatic question handling
* src/esx/esx_driver.c: add automatic question handling for all task related
driver functions
* src/esx/esx_util.[ch]: add handling for the auto_answer query parameter
* src/esx/esx_vi.[ch], src/esx/esx_vi_methods.[ch], src/esx/esx_vi_types.[ch]:
add new VI API methods and types and additional helper functions for
automatic question handling
Matthias Bolte [Fri, 18 Dec 2009 11:02:07 +0000 (12:02 +0100)]
Fix compilation with gcrypt < 1.4.2
Commit 33a198c1f6a4a1bc7f34d50a31032e03bec10fee increased the gcrypt
version requirement to 1.4.2 because the GCRY_THREAD_OPTION_VERSION
define was added in this version.
The configure script doesn't check for the gcrypt version. To support
gcrypt versions < 1.4.2 change the virTLSThreadImpl initialization
to use GCRY_THREAD_OPTION_VERSION only if it's defined.
Don't mix LDFLAGS and LIBS in the configure script
* configure.in: If you pass libraries in the LDFLAGS variable, and then
try AC_CHECK_FUNCS to find whether a function is present or not,
it'll fail badly when using the --as-needed linker flag. Instead,
pass the libraries through the LIBS library, so that they are passed
after the conftest.c source file and the tests are done properly.
Don't make it possible to define HAVE_HAL but not enable it in automake
* configure.in: With the previous logic, if libhal_get_all_devices
function was not found, HAVE_HAL would be defined for the preprocessor
but it wouldn't be enabled in automake conditionals, causing the final
link to fail with missing references to HAL entries.
Jiri Denemark [Fri, 18 Dec 2009 15:02:11 +0000 (16:02 +0100)]
Adds CPU selection infrastructure
Each driver supporting CPU selection must fill in host CPU capabilities.
When filling them, drivers for hypervisors running on the same node as
libvirtd can use cpuNodeData() to obtain raw CPU data. Other drivers,
such as VMware, need to implement their own way of getting such data.
Raw data can be decoded into virCPUDefPtr using cpuDecode() function.
When implementing virConnectCompareCPU(), a hypervisor driver can just
call cpuCompareXML() function with host CPU capabilities.
For each guest for which a driver supports selecting CPU models, it must
set the appropriate feature in guest's capabilities:
Actions needed when a domain is being created depend on whether the
hypervisor understands raw CPU data (currently CPUID for i686, x86_64
architectures) or symbolic names has to be used.
Typical use by hypervisors which prefer CPUID (such as VMware and Xen):
- convert guest CPU configuration from domain's XML into a set of raw
data structures each representing one of the feature policies:
Jiri Denemark [Fri, 18 Dec 2009 14:49:34 +0000 (15:49 +0100)]
CPU flags wire protocol format and server side
* src/remote/remote_protocol.x: update with new entry point
* daemon/remote.c: add the new server dispatcher
* daemon/remote_dispatch_args.h daemon/remote_dispatch_prototypes.h
daemon/remote_dispatch_ret.h daemon/remote_dispatch_table.h
src/remote/remote_protocol.c src/remote/remote_protocol.h: regenerated
Jiri Denemark [Fri, 18 Dec 2009 13:59:39 +0000 (14:59 +0100)]
Adds the internal driver API
* src/driver.h: add an extra entry point in the structure
* src/esx/esx_driver.c src/lxc/lxc_driver.c src/opennebula/one_driver.c
src/openvz/openvz_driver.c src/phyp/phyp_driver.c src/qemu/qemu_driver.c
src/remote/remote_driver.c src/test/test_driver.c src/uml/uml_driver.c
src/vbox/vbox_tmpl.c src/xen/xen_driver.c: add NULL entry points for
all drivers
Jiri Denemark [Fri, 18 Dec 2009 13:44:55 +0000 (14:44 +0100)]
XML parsing/formating code for CPU flags
* include/libvirt/virterror.h src/util/virterror.c: add new domain
VIR_FROM_CPU for errors
* src/conf/cpu_conf.c src/conf/cpu_conf.h: new parsing module
* src/Makefile.am proxy/Makefile.am: include new files
* src/conf/capabilities.[ch] src/conf/domain_conf.[ch]: reference
new code
* src/libvirt_private.syms: private export of new entry points
Where MATCH can be one of:
- 'minimum' specified CPU is the minimum requested CPU
- 'exact' disable all additional features provided by host CPU
- 'strict' fail if host CPU doesn't exactly match
POLICY can be one of:
- 'force' turn on the feature, even if host doesn't have it
- 'require' fail if host doesn't have the feature
- 'optional' match host
- 'disable' turn off the feature, even if host has it
- 'forbid' fail if host has the feature
'force' and 'disable' policies turn on/off the feature regardless of its
availability on host. 'force' is unlikely to be used but its there for
completeness since Xen and VMWare allow it.
'require' and 'forbid' policies prevent a guest from being started on a host
which doesn't/does have the feature. 'forbid' is for cases where you disable
the feature but a guest may still try to access it anyway and you don't want
it to succeed.
'optional' policy sets the feature according to its availability on host.
When a guest is booted on a host that has the feature and then migrated to
another host, the policy changes to 'require' as we can't take the feature
away from a running guest.
Default policy for features provided by host CPU but not specified in domain
configuration is set using match attribute of cpu tag. If 'minimum' match is
requested, additional features will be treated as if they were specified
with 'optional' policy. 'exact' match implies 'disable' policy and 'strict'
match stands for 'forbid' policy.
* docs/schemas/capability.rng docs/schemas/domain.rng: extend the
RelaxNG schemas to add CPU flags support
GNUTLS uses gcrypt for its crypto functions. gcrypt requires
that the app/library initializes threading before using it.
We don't want to force apps using libvirt to know about
gcrypt, so we make virInitialize init threading on their
behalf. This location also ensures libvirtd has initialized
it correctly. This initialization is required even if libvirt
itself were only using one thread, since another non-libvirt
library (eg GTK-VNC) could also be using gcrypt from another
thread
* src/libvirt.c: Register thread functions for gcrypt
* configure.in: Add -lgcrypt to linker flags
Fix bug in storage driver accessing wrong private data
* src/storage/storage_driver.c: Fix IsPersistent() and IsActivE()
methods on storage pools to use 'storagePrivateData' instead
of 'privateData'. Also fix naming convention of objects
Jim Meyering [Tue, 15 Dec 2009 18:22:31 +0000 (19:22 +0100)]
esx_vi.c: do not call through NULL function pointer
* src/esx/esx_vi.c (esxVI_List_CastFromAnyType): For invalid
inputs, fail right away. Do not "goto failure" where a NULL
input pointer would be dereferenced.
Jim Meyering [Tue, 15 Dec 2009 18:08:49 +0000 (19:08 +0100)]
esx_util.c: avoid NULL deref for invalid inputs
* src/esx/esx_util.c (esxUtil_ParseDatastoreRelatedPath): Return
right away for invalid inputs, rather than using them (which would
dereference NULL pointers) in clean-up code.
Jim Meyering [Tue, 15 Dec 2009 07:27:53 +0000 (08:27 +0100)]
avoid malfunction when virFileResolveLink is applied to non-POSIX FS
The virFileResolveLink utility function relied on the POSIX guarantee
that stat.st_size of a symlink is the length of the value. However,
on some types of file systems, it is invalid, so do not rely on it.
Use gnulib's areadlink module instead.
* bootstrap (modules): Add areadlink.
* src/util/util.c: Include "areadlink.h".
Let areadlink perform the readlink and malloc.
* configure.in (AC_CHECK_FUNCS): Remove readlink. No need,
since it's presence is guaranteed by gnulib.
Jim Meyering [Mon, 14 Dec 2009 20:37:54 +0000 (21:37 +0100)]
xm_internal.c: remove misleading dead code
* src/xen/xm_internal.c (xenXMConfigGetULong): Remove useless and
misleading test (always false) for val->str == NULL before code that
always dereferences val->str. "val" comes from virConfGetValue, and
at that point, val->str is guaranteed to be non-NULL.
(xenXMConfigGetBool): Likewise.
* src/util/conf.c (virConfSetValue): Ensure that vir->str is never NULL,
not even if someone tries to set such a value via virConfSetValue.
Jim Meyering [Mon, 14 Dec 2009 16:02:56 +0000 (17:02 +0100)]
qemu migration: avoid NULL-deref given an invalid input
* src/qemu/qemu_driver.c (doNonTunnelMigrate): Don't let a
NULL "uri_out" provoke a NULL-dereference in doNativeMigrate:
supply omitted goto-after-qemudReportError.
Jim Meyering [Mon, 14 Dec 2009 15:41:11 +0000 (16:41 +0100)]
qemu_driver.c: don't unlink(NULL) on OOM error path
* src/qemu/qemu_driver.c (qemudDomainMigratePrepareTunnel): Upon an
out of memory error, we would end up with unixfile==NULL and attempt
to unlink(NULL). Skip the unlink when it's NULL.
Jim Meyering [Mon, 14 Dec 2009 14:55:19 +0000 (15:55 +0100)]
qemu_driver.c: avoid double free on error path
* src/qemu/qemu_driver.c (qemudDomainMigrateFinish2): Set
"event" to NULL after qemuDomainEventQueue frees it, so a
subsequent free (after endjob label) upon qemuMonitorStartCPUs
failure does not cause a double free.
Matthias Bolte [Sun, 13 Dec 2009 17:25:17 +0000 (18:25 +0100)]
Fix and improve domain xml video element description
The description mismatched the actual structure since the video element
was introduced. The nvram attribute is actually called vram. Specify the
unit of the vram attribute.
Matthias Bolte [Fri, 11 Dec 2009 23:11:31 +0000 (00:11 +0100)]
Fix install location for Python bindings
Commit 66137344feb488ea87b0d92f3c03844d9a7a7786 changed the Python detection
mechanism in configure to use AM_PATH_PYTHON. This results in a changed
install location for the Python bindings, at least on Fedora 12 64bit systems.
Before this commit libvirt.py and libvirtmod.so were installed to
/usr/lib64/python2.6/site-packages
After this commit they are installed to
/usr/lib/python2.6/site-packages
Mixed Python packages (containing *.py and *.so files) should be installed to
the pyexecdir directory detected by AM_PATH_PYTHON.
This restores the install location from before the AM_PATH_PYTHON commit.
* configure.in: remove unnecessary pythondir export
* python/Makefile.am: switch from pythondir to pyexecdir
Jim Meyering [Mon, 14 Dec 2009 13:34:29 +0000 (14:34 +0100)]
virsh: avoid double-free
* tools/virsh.c (vshCommandParse): Avoid double-free of "tkdata".
Set it to NULL immediately after free in the (cmd == NULL) case,
just as in the other case, in case the final free(tkdata) is
triggered by a syntax error.
Jim Meyering [Mon, 14 Dec 2009 11:05:38 +0000 (12:05 +0100)]
node_device_driver.c: don't write beyond EOB for 4K-byte symlink
* 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.
Matthew Booth [Mon, 14 Dec 2009 15:23:26 +0000 (16:23 +0100)]
Fix owner and group in example volume XML
The owner and group in the documentation examples were confusingly given as
'0744'. They should be numeric uid and gid. Changed the examples to use the
default uid and gid assigned to qemu in F12.
* docs/formatstorage.html.in: Change example owner and group in volume XML
Laine Stump [Mon, 14 Dec 2009 15:15:28 +0000 (16:15 +0100)]
Eliminate failure to delete empty storage pools
* src/storage/storage_backend_fs.c: virStorageBackendFileSystemDelete
was incorrectly calling unlink() in an attempt to remove a directory.
It should be calling rmdir() instead.
The bug reporter says that vol-delete does not support the --pool
option, but that's not the case in the current head. This patch makes
vol-path behave the same way as vol-delete
* tools/virsh.c: Modified vol-path to use the same logic as vol-delete,
allowing the syntax: virsh vol-path --pool testdirpool testvol0
Jamie Strandboge [Mon, 14 Dec 2009 12:40:42 +0000 (13:40 +0100)]
add AppArmor test and examples to dist
tests/virt-aa-helper-test and examples/apparmor are not included in
official tarballs, but should be. Attached is a patch to fix that
which works when apparmor is and is not available.
Paolo Bonzini [Mon, 14 Dec 2009 11:10:38 +0000 (12:10 +0100)]
add --live support to "virsh dump"
This is trivial for QEMU since you just have to not stop the vm before
starting the dump. And for Xen, you just pass the flag down to xend.
* include/libvirt/libvirt.h.in (virDomainCoreDumpFlags): Add VIR_DUMP_LIVE.
* src/qemu/qemu_driver.c (qemudDomainCoreDump): Support live dumping.
* src/xen/xend_internal.c (xenDaemonDomainCoreDump): Support live dumping.
* tools/virsh.c (opts_dump): Add --live. (cmdDump): Map it to VIR_DUMP_LIVE.
Paolo Bonzini [Mon, 14 Dec 2009 10:59:27 +0000 (11:59 +0100)]
add --crash support to "virsh dump"
This patch adds the --crash option (already present in "xm dump-core")
to "virsh dump". virDomainCoreDump already has a flags argument, so
the API/ABI is untouched.
* include/libvirt/libvirt.h.in (virDomainCoreDumpFlags): New flag for
CoreDump
* src/test/test_driver.c (testDomainCoreDump): Do not crash
after dump unless VIR_DUMP_CRASH is given.
* src/qemu/qemu_driver.c (qemudDomainCoreDump): Shutdown the domain
instead of restarting it if --crash is passed.
* src/xen/xend_internal.c (xenDaemonDomainCoreDump): Support --crash.
* tools/virsh.c (opts_dump): Add --crash.
(cmdDump): Map it to flags for virDomainCoreDump and pass them.
Daniel Veillard [Mon, 14 Dec 2009 10:05:55 +0000 (11:05 +0100)]
Fix a couple of problems in last patch
Those were pointed by DanB in his review but not yet fixed
* src/qemu/qemu_driver.c: qemudWaitForMonitor() use EnterMonitorWithDriver()
and ExitMonitorWithDriver() there
* src/qemu/qemu_monitor_text.c: checking fro strdu failure and hash
table add error in qemuMonitorTextGetPtyPaths()
Matthew Booth [Mon, 14 Dec 2009 09:50:01 +0000 (10:50 +0100)]
Get QEMU pty paths from the monitor
This change makes the QEMU driver get pty paths from the output of the
monitor 'info chardev' command. This output is structured, and contains
both the name of the device and the path on the same line. This is
considerably more reliable than parsing the startup log output, which
requires the parsing code to know which order QEMU will print pty
information in.
Note that we still need to parse the log output as the monitor itself
may be on a pty. This should be rare, however, and the new code will
replace all pty paths parsed by the log output method once the monitor
is available.
* src/qemu/qemu_monitor.(c|h) src/qemu_monitor_text.(c|h): Implement
qemuMonitorGetPtyPaths().
* src/qemu/qemu_driver.c: Get pty path information using
qemuMonitorGetPtyPaths().