Given an LXC guest with a root filesystem path of
/export/lxc/roots/helloworld/root
During startup, we will pivot the root filesystem to end up
at
/.oldroot/export/lxc/roots/helloworld/root
We then try to open
/.oldroot/export/lxc/roots/helloworld/root/dev/pts
Now consider if '/export/lxc' is an absolute symlink pointing
to '/media/lxc'. The kernel will try to open
/media/lxc/roots/helloworld/root/dev/pts
whereas it should be trying to open
/.oldroot//media/lxc/roots/helloworld/root/dev/pts
To deal with the fact that the root filesystem can be moved,
we need to resolve symlinks in *any* part of the filesystem
source path.
* src/libvirt_private.syms, src/util/util.c,
src/util/util.h: Add virFileResolveAllLinks to resolve
all symlinks in a path
* src/lxc/lxc_container.c: Resolve all symlinks in filesystem
paths during startup
pciTrySecondaryBusReset checks if there is active device on the
same bus, however, qemu driver doesn't maintain an effective
list for the inactive devices, and it passes meaningless argument
for parameter "inactiveDevs". e.g. (qemuPrepareHostdevPCIDevices)
if (!(pcidevs = qemuGetPciHostDeviceList(hostdevs, nhostdevs)))
return -1;
..skipped...
if (pciResetDevice(dev, driver->activePciHostdevs, pcidevs) < 0)
goto reattachdevs;
NB, the "pcidevs" used above are extracted from domain def, and
thus one won't be able to attach a device of which bus has other
device even detached from host (nodedev-detach). To see more
details of the problem:
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=773667
This patch is to resolve the problem by introducing an inactive
PCI device list (just like qemu_driver->activePciHostdevs), and
the whole logic is:
* Add the device to inactive list during nodedev-dettach
* Remove the device from inactive list during nodedev-reattach
* Remove the device from inactive list during attach-device
(for non-managed device)
* Add the device to inactive list after detach-device, only
if the device is not managed
With the above, we have a sufficient inactive PCI device list, and thus
we can use it for pciResetDevice. e.g.(qemuPrepareHostdevPCIDevices)
if (pciResetDevice(dev, driver->activePciHostdevs,
driver->inactivePciHostdevs) < 0)
goto reattachdevs;
This introduces new attribute wrpolicy with only supported
value as immediate. This will be an optional
attribute with no defaults. This helps specify whether
to skip the host page cache.
When wrpolicy is specified, meaning when wrpolicy=immediate
a writeback is explicitly initiated for the dirty pages in
the host page cache as part of the guest file write operation.
Usage:
<filesystem type='mount' accessmode='passthrough'>
<driver type='path' wrpolicy='immediate'/>
<source dir='/export/to/guest'/>
<target dir='mount_tag'/>
</filesystem>
Currently this only works with type='mount' for the QEMU/KVM driver.
Signed-off-by: Deepak C Shetty <deepakcs@linux.vnet.ibm.com>
In the past we didn't reserve 0:0:2.0 PCI address if there was no video
device assigned to a domain, which made it impossible to add a video
device later on. So we fixed it (commit v0.9.0-37-g7b2cac1) by always
reserving that address. However, that breaks existing domains without
video devices that already have another device assigned to the
problematic address.
This patch reserves address 0:0:2.0 only in case it was not explicitly
assigned to another device, which means libvirt will try to keep this
address free and will not automatically assign it new devices. But
existing domains for which older libvirt already assigned the address to
a non-video device will keep working as they used to work before 0.9.1.
Moreover, users who want to create a domain without a video device and
use its address for another device may do so by explicitly configuring
the PCI address in domain XML.
There are several reasons for doing this:
- the CPU specification is out of libvirt's control so we cannot
guarantee stable guest ABI
- not every feature of a CPU may actually work as expected when
advertised directly to a guest
- migration between two machines with exactly the same CPU may work but
no guarantees can be made
- this mode is not supported and its use is at one's own risk
VIR_DOMAIN_XML_UPDATE_CPU flag for virDomainGetXMLDesc may be used to
get updated custom mode guest CPU definition in case it depends on host
CPU. This patch implements the same behavior for host-model and
host-passthrough CPU modes.
The mode can be either of "custom" (default), "host-model",
"host-passthrough". The semantics of each mode is described in the
following examples:
- guest CPU is a default model with specified topology:
<cpu>
<topology sockets='1' cores='2' threads='1'/>
</cpu>
- guest CPU matches selected model:
<cpu mode='custom' match='exact'>
<model>core2duo</model>
</cpu>
- guest CPU should be a copy of host CPU as advertised by capabilities
XML (this is a short cut for manually copying host CPU specification
from capabilities to domain XML):
<cpu mode='host-model'/>
In case a hypervisor does not support the exact host model, libvirt
automatically falls back to a closest supported CPU model and
removes/adds features to match host. This behavior can be disabled by
<cpu mode='host-model'>
<model fallback='forbid'/>
</cpu>
- the same as previous returned by virDomainGetXMLDesc with
VIR_DOMAIN_XML_UPDATE_CPU flag:
<cpu mode='host-model' match='exact'>
<model fallback='allow'>Penryn</model> --+
<vendor>Intel</vendor> |
<topology sockets='2' cores='4' threads='1'/> + copied from
<feature policy='require' name='dca'/> | capabilities XML
<feature policy='require' name='xtpr'/> |
... --+
</cpu>
- guest CPU should be exactly the same as host CPU even in the aspects
libvirt doesn't model (such domain cannot be migrated unless both
hosts contain exactly the same CPUs):
<cpu mode='host-passthrough'/>
- the same as previous returned by virDomainGetXMLDesc with
VIR_DOMAIN_XML_UPDATE_CPU flag:
<cpu mode='host-passthrough' match='minimal'>
<model>Penryn</model> --+ copied from caps
<vendor>Intel</vendor> | XML but doesn't
<topology sockets='2' cores='4' threads='1'/> | describe all
<feature policy='require' name='dca'/> | aspects of the
<feature policy='require' name='xtpr'/> | actual guest CPU
... --+
</cpu>
In case a hypervisor doesn't support the exact CPU model requested by a
domain XML, we automatically fallback to a closest CPU model the
hypervisor supports (and make sure we add/remove any additional features
if needed). This patch adds 'fallback' attribute to model element, which
can be used to disable this automatic fallback.
Commit 5d784bd6d7b19314b0908aec6b46bfe377aeba42 was a nice attempt to
clarify the semantics by requiring domain name from dxml to either match
original name or dname. However, setting dxml domain name to dname
doesn't really work since destination host needs to know the original
domain name to be able to use it in migration cookies. This patch
requires domain name in dxml to match the original domain name. The
change should be safe and backward compatible since migration would fail
just a bit later in the process.
There are three address validation routines that do nothing:
virDomainDeviceDriveAddressIsValid()
virDomainDeviceUSBAddressIsValid()
virDomainDeviceVirtioSerialAddressIsValid()
Remove them, and replace their call sites with "1" which is what they
currently return. In some cases this means we can remove an entire
if block.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
We can't call qemuCapsExtractVersionInfo() from test code, because it
expects to be able to call the emulator, and for testing we have fake
emulators that can't be executed. For that reason qemuxml2argvtest.c
doesn't call qemuDomainAssignPCIAddresses(), instead it open codes its
own version.
That means we can't call qemuDomainAssignAddresses() from the test code,
instead we need to manually call qemuDomainAssignSpaprVioAddresses().
Also add logic to cope with qemuDomainAssignSpaprVioAddresses() failing,
so that we can write a test that checks for a known failure in there.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
KVM will be able to use a PCI SCSI controller even on POWER. Let
the user specify the vSCSI controller by other means than a default.
After this patch, the QEMU driver will actually look at the model
and reject anything but auto, lsilogic and ibmvscsi.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Commit d09f6ba5feb655925175dc80122ca2a1e14db2b9 introduced a regression in event
registration. virDomainEventCallbackListAddID() will only return a positive
integer if the type of event being registered is VIR_DOMAIN_EVENT_ID_LIFECYCLE.
For other event types, 0 is always returned on success. This has the
unfortunate side effect of not enabling remote event callbacks because
remoteDomainEventRegisterAny() uses the return value from the local call to
determine if an event callback needs to be registered on the remote end.
Make sure virDomainEventCallbackListAddID() returns the callback count for the
eventID being registered.
Signed-off-by: Adam Litke <agl@us.ibm.com>
The new introduced optional attribute "copy_on_read</code> controls
whether to copy read backing file into the image file. The value can
be either "on" or "off". Copy-on-read avoids accessing the same backing
file sectors repeatedly and is useful when the backing file is over a
slow network. By default copy-on-read is off.
Earlier, when the number of vcpus was greater than the topology allowed,
libvirt didn't raise an error and continued, resulting in running qemu
with parameters making no sense. Even though qemu did not report any
error itself, the number of vcpus was set to maximum allowed by the
topology.
Detected by Coverity. Although unlikely, if we are ever started
with stdin closed, we could reach a situation where we open a
uuid file but then fail to close it, making that file the new
stdin for the rest of the process.
* src/util/uuid.c (getDMISystemUUID): Allow for stdin.
Currently the LXC controller attempts to deal with EOF on a
tty by spawning a thread to do an edge triggered epoll_wait().
This avoids the normal event loop spinning on POLLHUP. There
is a subtle mistake though - even after seeing POLLHUP on a
master PTY, it is still perfectly possible & valid to write
data to the PTY. There is a buffer that can be filled with
data, even when no client is present.
The second mistake is that the epoll_wait() thread was not
looking for the EPOLLOUT condition, so when a new client
connects to the LXC console, it had to explicitly send a
character before any queued output would appear.
Finally, there was in fact no need to spawn a new thread to
deal with epoll_wait(). The epoll file descriptor itself
can be poll()'d on normally.
This patch attempts to deal with all these problems.
- The blocking epoll_wait() thread is replaced by a poll
on the epoll file descriptor which then does a non-blocking
epoll_wait() to handle events
- Even if POLLHUP is seen, we continue trying to write
any pending output until getting EAGAIN from write.
- Once write returns EAGAIN, we modify the epoll event
mask to also look for EPOLLOUT
* src/lxc/lxc_controller.c: Avoid stalled I/O upon
connected to an LXC console
If client stream does not have any data to sink and neither received
EOF, a dummy packet is sent to the daemon signalising client is ready to
sink some data. However, after we added event loop to client a race may
occur:
Thread 1 calls virNetClientStreamRecvPacket and since no data are cached
nor stream has EOF, it decides to send dummy packet to server which will
sent some data in turn. However, during this decision and actual message
exchange with server -
Thread 2 receives last stream data from server. Therefore an EOF is set
on stream and if there is a call waiting (which is not yet) it is woken
up. However, Thread 1 haven't sent anything so far, so there is no call
to be woken up. So this thread sent dummy packet to daemon, which
ignores that as no stream is associated with such packet and therefore
no reply will ever come.
This race causes client to hang indefinitely.
QEMU does not support security_model for anything but 'path' fs driver type.
Currently in libvirt, when security_model ( accessmode attribute) is not
specified it auto-generates it irrespective of the fs driver type, which
can result in a qemu error for drivers other than path. This patch ensures
that the qemu cmdline is correctly generated by taking into account the
fs driver type.
Signed-off-by: Deepak C Shetty <deepakcs@linux.vnet.ibm.com>
If a system has 64 or more VF's, it is quite tedious to mention each VF
in the interface pool.
The following modification will implicitly create an interface pool from
the SR-IOV PF.
This functions enables us to get the Virtual Functions attached to
a Physical function given the name of a SR-IOV physical functio.
In order to accomplish the task, added a getter function pciGetDeviceAddrString
to get the BDF of the Virtual Function in a char array.
The autobuilder pointed out an odd failure on mingw:
../../src/interface/netcf_driver.c:644:5: error: unknown field 'close_used_without_including_unistd_h' specified in initializer
cc1: warnings being treated as errors
This is because the gnulib headers #define close to different strings,
according to which headers are included, in order to work around some
odd mingw problems with close(), and these defines happen to also
affect field members declared with a name of struct foo.close. As long
as all headers are included before both the definition and use of the
struct, the various #define doesn't matter, but the netcf file hit
an instance where things were included in a different order. Fix this
for all clients that use a struct member named 'close'.
* src/driver.h: Include <unistd.h> before using 'close'.
For some weird reason, i686-pc-mingw32-gcc version 4.6.1 at -O2 complained:
../../src/conf/nwfilter_params.c: In function 'virNWFilterVarCombIterCreate':
../../src/conf/nwfilter_params.c:346:23: error: 'minValue' may be used uninitialized in this function [-Werror=uninitialized]
../../src/conf/nwfilter_params.c:319:28: note: 'minValue' was declared here
../../src/conf/nwfilter_params.c:344:23: error: 'maxValue' may be used uninitialized in this function [-Werror=uninitialized]
../../src/conf/nwfilter_params.c:319:18: note: 'maxValue' was declared here
cc1: all warnings being treated as errors
even though all paths of the preceding switch statement either
assign the variables or return.
* src/conf/nwfilter_params.c (virNWFilterVarCombIterAddVariable):
Initialize variables.
Address side effect of accessing a variable via an index: Filters
accessing a variable where an element is accessed that is beyond the
size of the list (for example $TEST[10] and only 2 elements are available)
cannot instantiate that filter. Test for this and report proper error
to user.
This patch adds access to single elements of variables via index. Example:
<rule action='accept' direction='in' priority='500'>
<tcp srcipaddr='$ADDR[1]' srcportstart='$B[2]'/>
</rule>
This patch introduces the capability to use a different iterator per
variable.
The currently supported notation of variables in a filtering rule like
<rule action='accept' direction='out'>
<tcp srcipaddr='$A' srcportstart='$B'/>
</rule>
processes the two lists 'A' and 'B' in parallel. This means that A and B
must have the same number of 'N' elements and that 'N' rules will be
instantiated (assuming all tuples from A and B are unique).
In this patch we now introduce the assignment of variables to different
iterators. Therefore a rule like
<rule action='accept' direction='out'>
<tcp srcipaddr='$A[@1]' srcportstart='$B[@2]'/>
</rule>
will now create every combination of elements in A with elements in B since
A has been assigned to an iterator with Id '1' and B has been assigned to an
iterator with Id '2', thus processing their value independently.
The first rule has an equivalent notation of
<rule action='accept' direction='out'>
<tcp srcipaddr='$A[@0]' srcportstart='$B[@0]'/>
</rule>
In this patch we introduce testing whether the iterator points to a
unique set of entries that have not been seen before at one of the previous
iterations. The point is to eliminate duplicates and with that unnecessary
filtering rules by preventing identical filtering rules from being
instantiated.
Example with two lists:
list1 = [1,2,1]
list2 = [1,3,1]
The 1st iteration would take the 1st items of each list -> 1,1
The 2nd iteration would take the 2nd items of each list -> 2,3
The 3rd iteration would take the 3rd items of each list -> 1,1 but
skip them since this same pair has already been encountered in the 1st
iteration
Implementation-wise this is solved by taking the n-th element of list1 and
comparing it against elements 1..n-1. If no equivalent is found, then there
is no possibility of this being a duplicate. In case an equivalent element
is found at position i, then the n-th element in the 2nd list is compared
against the i-th element in the 2nd list and if that is not the same, then
this is a unique pair, otherwise it is not unique and we may need to do
the same comparison on the 3rd list.
When sVirt is integrated with the LXC driver, it will be neccessary
to invoke the security driver APIs using only a virDomainDefPtr
since the lxc_container.c code has no virDomainObjPtr available.
Aside from two functions which want obj->pid, every bit of the
security driver code only touches obj->def. So we don't need to
pass a virDomainObjPtr into the security drivers, a virDomainDefPtr
is sufficient. Two functions also gain a 'pid_t pid' argument.
* src/qemu/qemu_driver.c, src/qemu/qemu_hotplug.c,
src/qemu/qemu_migration.c, src/qemu/qemu_process.c,
src/security/security_apparmor.c,
src/security/security_dac.c,
src/security/security_driver.h,
src/security/security_manager.c,
src/security/security_manager.h,
src/security/security_nop.c,
src/security/security_selinux.c,
src/security/security_stack.c: Change all security APIs to use a
virDomainDefPtr instead of virDomainObjPtr
When disk snapshots were first implemented, libvirt blindly refused
to allow an external snapshot destination that already exists, since
qemu will blindly overwrite the contents of that file during the
snapshot_blkdev monitor command, and we don't like a default of
data loss by default. But VDSM has a scenario where NFS permissions
are intentionally set so that the destination file can only be
created by the management machine, and not the machine where the
guest is running, so that libvirt will necessarily see the destination
file already existing; adding a flag will allow VDSM to force the file
reuse without libvirt complaining of possible data loss.
https://bugzilla.redhat.com/show_bug.cgi?id=767104
* include/libvirt/libvirt.h.in (virDomainSnapshotCreateFlags): Add
VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT.
* src/libvirt.c (virDomainSnapshotCreateXML): Document it. Add
note about partial failure.
* tools/virsh.c (cmdSnapshotCreate, cmdSnapshotCreateAs): Add new
flag.
* tools/virsh.pod (snapshot-create, snapshot-create-as): Document
it.
* src/qemu/qemu_driver.c (qemuDomainSnapshotDiskPrepare)
(qemuDomainSnapshotCreateXML): Implement the new flag.
We had loads of different styles in describing the @flags parameter
for various APIs, as well as several APIs that didn't list which
enums provided the bit values valid for the flags.
The end result is one of two formats:
@flags: bitwise-OR of vir...Flags
@flags: extra flags; not used yet, so callers should always pass 0
* src/libvirt.c: Use common sentences for flags. Also,
(virDomainGetBlockIoTune): Mention virTypedParameterFlags.
(virConnectOpenAuth): Mention virConnectFlags.
(virDomainMigrate, virDomainMigrate2, virDomainMigrateToURI)
(virDomainMigrateToURI2): Mention virDomainMigrateFlags.
(virDomainMemoryPeek): Mention virDomainMemoryFlags.
(virStoragePoolBuild): Mention virStoragePoolBuildFlags.
(virStoragePoolDelete): Mention virStoragePoolDeleteFlags.
(virStreamNew): Mention virStreamFlags.
(virDomainOpenGraphics): Mention virDomainOpenGraphicsFlags.
This *kind of* addresses:
https://bugzilla.redhat.com/show_bug.cgi?id=772395
(it doesn't eliminate the failure to start, but causes libvirt to give
a better idea about the cause of the failure).
If a guest uses a kvm emulator (e.g. /usr/bin/qemu-kvm) and the guest
is started when kvm isn't available (either because virtualization is
unavailable / has been disabled in the BIOS, or the kvm modules
haven't been loaded for some reason), a semi-cryptic error message is
logged:
libvirtError: internal error Child process (LC_ALL=C
PATH=/sbin:/usr/sbin:/bin:/usr/bin /usr/bin/qemu-kvm -device ? -device
pci-assign,? -device virtio-blk-pci,? -device virtio-net-pci,?) status
unexpected: exit status 1
This patch notices at process start that a guest needs kvm, and checks
for the presence of /dev/kvm (a reasonable indicator that kvm is
available) before trying to execute the qemu binary. If kvm isn't
available, a more useful (too verbose??) error is logged.
It should be a copy-paste error, the result is programming will result in an
infinite loop again due to without iterating 'j' variable.
* src/qemu/qemu_driver.c: fix a typo on qemuDomainSetBlkioParameters.
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=770520
Signed-off-by: Alex Jia <ajia@redhat.com>
I previously mentioned [1] a PolicyKit issue where libvirt would
proceed with authentication even though polkit-auth failed:
testusr xen134:~> virsh list --all
Attempting to obtain authorization for org.libvirt.unix.manage.
polkit-grant-helper: given auth type (8 -> yes) is bogus
Failed to obtain authorization for org.libvirt.unix.manage.
Id Name State
----------------------------------
0 Domain-0 running
- sles11sp1-pv shut off
AFAICT, libvirt attempts to obtain a privilege it already has,
causing polkit-auth to fail with above message. Instead of calling
obtain and then checking auth, IMO the workflow should be for the
server to check auth first, and if that fails ask the client to
obtain it and check again. This workflow also allows for checking
only successful exit of polkit-auth in virConnectAuthGainPolkit().
[1] https://www.redhat.com/archives/libvir-list/2011-December/msg00837.html
In the past, generic SCSI commands issued from a guest to a virtio
disk were always passed through to the underlying disk by qemu, and
the kernel would also pass them on.
As a result of CVE-2011-4127 (see:
http://seclists.org/oss-sec/2011/q4/536), qemu now honors its
scsi=on|off device option for virtio-blk-pci (which enables/disables
passthrough of generic SCSI commands), and the kernel will only allow
the commands for physical devices (not for partitions or logical
volumes). The default behavior of qemu is still to allow sending
generic SCSI commands to physical disks that are presented to a guest
as virtio-blk-pci devices, but libvirt prefers to disable those
commands in the standard virtio block devices, enabling it only when
specifically requested (hopefully indicating that the requester
understands what they're asking for). For this purpose, a new libvirt
disk device type (device='lun') has been created.
device='lun' is identical to the default device='disk', except that:
1) It is only allowed if bus='virtio', type='block', and the qemu
version is "new enough" to support it ("new enough" == qemu 0.11 or
better), otherwise the domain will fail to start and a
CONFIG_UNSUPPORTED error will be logged).
2) The option "scsi=on" will be added to the -device arg to allow
SG_IO commands (if device !='lun', "scsi=off" will be added to the
-device arg so that SG_IO commands are specifically forbidden).
Guests which continue to use disk device='disk' (the default) will no
longer be able to use SG_IO commands on the disk; those that have
their disk device changed to device='lun' will still be able to use SG_IO
commands.
*docs/formatdomain.html.in - document the new device attribute value.
*docs/schemas/domaincommon.rng - allow it in the RNG
*tests/* - update the args of several existing tests to add scsi=off, and
add one new test that will test scsi=on.
*src/conf/domain_conf.c - update domain XML parser and formatter
*src/qemu/qemu_(command|driver|hotplug).c - treat
VIR_DOMAIN_DISK_DEVICE_LUN *almost* identically to
VIR_DOMAIN_DISK_DEVICE_DISK, except as indicated above.
Note that no support for this new device value was added to any
hypervisor drivers other than qemu, because it's unclear what it might
mean (if anything) to those drivers.
This patch adds two capabilities flags to deal with various aspects
of supporting SG_IO commands on virtio-blk-pci devices:
QEMU_CAPS_VIRTIO_BLK_SCSI
set if -device virtio-blk-pci accepts the scsi="on|off" option
When present, this is on by default, but can be set to off to disable
SG_IO functions.
QEMU_CAPS_VIRTIO_BLK_SG_IO
set if SG_IO commands are supported in the virtio-blk-pci driver
(present since qemu 0.11 according to a qemu developer, if I
understood correctly)
This fixes https://bugzilla.redhat.com/show_bug.cgi?id=638633
Although scripts are not used by interfaces of type other than
"ethernet" in qemu, due to the fact that the parser stores the script
name in a union that is only valid when type is ethernet or bridge,
there is no way for anyone except the parser itself to catch the
problem of specifying an interface script for an inappropriate
interface type (by the time the parsed data gets back to the code that
called the parser, all evidence that a script was specified is
forgotten).
Since the parser itself should be agnostic to which type of interface
allows scripts (an example of why: a script specified for an interface
of type bridge is valid for xen domains, but not for qemu domains),
the solution here is to move the script out of the union(s) in the
DomainNetDef, always populate it when specified (regardless of
interface type), and let the driver decide whether or not it is
appropriate.
Currently the qemu, xen, libxml, and uml drivers recognize the script
parameter and do something with it (the uml driver only to report that
it isn't supported). Those drivers have been updated to log a
CONFIG_UNSUPPORTED error when a script is specified for an interface
type that's inappropriate for that particular hypervisor.
(NB: There was earlier discussion of solving this problem by adding a
VALIDATE flag to all libvirt APIs that accept XML, which would cause
the XML to be validated against the RNG files. One statement during
that discussion was that the RNG shouldn't contain hypervisor-specific
things, though, and a proper solution to this problem would require
that (again, because a script for an interface of type "bridge" is
accepted by xen, but not by qemu).
Commit ae523427 missed one pair of functions that could use
the helper routine.
* src/qemu/qemu_driver.c (qemuSetSchedulerParametersFlags)
(qemuGetSchedulerParametersFlags): Simplify.
On rawhide, gcc is new enough to output new DWARF information that
pdwtags has not yet learned, but the resulting 'make check' output
was rather confusing:
$ make -C src check
...
GEN virkeepaliveprotocol-structs
die__process_function: DW_TAG_INVALID (0x4109) @ <0x58c> not handled!
WARNING: your pdwtags program is too old
WARNING: skipping the virkeepaliveprotocol-structs test
WARNING: install dwarves-1.3 or newer
...
$ pdwtags --version
v1.9
I've filed the pdwtags deficiency as
https://bugzilla.redhat.com/show_bug.cgi?id=772358
* src/Makefile.am (PDWTAGS): Don't leave -t file behind on version
mismatch. Soften warning message, since 1.9 is newer than 1.3.
Don't leak stderr from broken version.
Commit db371a2 mistakenly added new functions inside a #ifndef WIN32
guard, even though they are needed on all platforms.
* src/util/command.c (virCommandFDSet): Move outside WIN32
conditional.
Detected by valgrind. Leak introduced in commit 5745dc1.
* src/qemu/qemu_command.c: fix memory leak on failure and successful path.
* How to reproduce?
% valgrind -v --leak-check=full ./qemuargv2xmltest
* Actual result:
==2196== 80 bytes in 1 blocks are definitely lost in loss record 3 of 4
==2196== at 0x4A05FDE: malloc (vg_replace_malloc.c:236)
==2196== by 0x39CF07F6E1: strdup (in /lib64/libc-2.12.so)
==2196== by 0x419823: qemuParseRBDString (qemu_command.c:1657)
==2196== by 0x4221ED: qemuParseCommandLine (qemu_command.c:5934)
==2196== by 0x422AFB: qemuParseCommandLineString (qemu_command.c:7561)
==2196== by 0x416864: testCompareXMLToArgvHelper (qemuargv2xmltest.c:48)
==2196== by 0x417DB1: virtTestRun (testutils.c:141)
==2196== by 0x415CAF: mymain (qemuargv2xmltest.c:175)
==2196== by 0x4174A7: virtTestMain (testutils.c:696)
==2196== by 0x39CF01ECDC: (below main) (in /lib64/libc-2.12.so)
==2196==
==2196== LEAK SUMMARY:
==2196== definitely lost: 80 bytes in 1 blocks
Signed-off-by: Alex Jia <ajia@redhat.com>
