Actually, I'm turning this function into a macro as filename,
function name and line number needs to be passed. The new
function virAsprintfInternal is introduced with the extended set
of arguments.
Create parent directroy for hostdev automatically when we
start a lxc domain or attach a hostdev to a lxc domain.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
This helper function is used to create parent directory for
the hostdev which will be added to the container. If the
parent directory of this hostdev doesn't exist, the mknod of
the hostdev will fail. eg with /dev/net/tun
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Many applications use /dev/tty to read from stdin.
e.g. zypper on openSUSE.
Let's create this device node to unbreak those applications.
As /dev/tty is a synonym for the current controlling terminal
it cannot harm the host or any other containers.
Signed-off-by: Richard Weinberger <richard@nod.at>
The device bus value was used instead of the device target when
building the sysfs device path. Trivial.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
The imagelabel SELinux label was only generated when relabeling was
enabled. This prohibited labeling of files created by libvirt that need
to be labeled even if relabeling is turned off.
The only codepath this change has direct impact on is labeling of FDs
passed to qemu which is always safe in current state.
Whenever virPortAllocatorRelease is called with port == 0, it complains
that the port is not in an allowed range, which is expectable as the
port was never allocated. Let's make virPortAllocatorRelease ignore 0
ports in a similar way free() ignores NULL pointers.
https://bugzilla.redhat.com/show_bug.cgi?id=981139
If a domain is paused before migration starts, we need to tell that to
the destination libvirtd to prevent it from resuming the domain at the
end of migration. This regression was introduced by commit 5379bb0.
<hyperv>
<spinlocks state='off'/>
</hyperv>
results in:
error: XML error: missing HyperV spinlock retry count
Don't require retries when state is off and use virXPathUInt
instead of virXPathString to simplify parsing.
https://bugzilla.redhat.com/show_bug.cgi?id=784836#c19
Use virDomainObjListRemoveLocked instead of virDomainObjListRemove, as
driver->domains is already taken by virDomainObjListForEach.
Above deadlock can be triggered when libvirtd is started after some
domain have been started by hand (in which case driver will not find
libvirt-xml domain config).
Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
While iterating with virDomainObjListForEach it is safe to remove
current element. But while iterating, 'doms' lock is already taken, so
can't use standard virDomainObjListRemove. So introduce
virDomainObjListRemoveLocked for this purpose.
Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
The 'check-aclrules' test case validates that there are ACL
checks in each method. This extends it so that it can also
validate that methods which return info about lists of objects,
will filter their returned info throw an ACL check.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Ensure that all APIs which list interface objects filter
them against the access control system.
This makes the APIs for listing names and counting devices
slightly less efficient, since we can't use the direct
netcf APIs for these tasks. Instead we have to ask netcf
for the full list of objects & iterate over the list
filtering them out.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Ensure that all APIs which list nwfilter objects filter
them against the access control system.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Ensure that all APIs which list node device objects filter
them against the access control system.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Change the ACL filter functions to use a 'bool' return
type instead of a tri-state 'int' return type. The callers
of these functions don't want to distinguish 'auth failed'
from other errors.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Since commit 23e8b5d8, the code is refactored in a way that supports
domains with multiple graphics elements and commit 37b415200 allows
starting such domains. However none of those commits take migration
into account. Even though qemu doesn't support relocation for
anything else than SPICE and for no more than one graphics, there is no
reason to hardcode one graphics into this part of the code as well.
libivrt lxc can only set generic weight for container,
This patch allows user to setup per device blkio
weigh for container.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
When removing a TAP device, the associated bandwidth settings are
removed. Currently, the /sbin/tc is used for that. It is spawned
several times. Moreover, we use the same @cmd variable to
construct the command and its arguments. That means we need to
virCommandFree(cmd); prior to each virCommandNew(TC); which
wasn't done.
Add monitor callback API domainGuestPanic, that implements
'destroy', 'restart' and 'preserve' events of the 'on_crash'
in the XML when domain crashed.
On a mingw VPATH build (such as done by ./autobuild.sh), the tarball
created by 'make dist' was including generated files. The VPATH
rules were then seeing that the tarball files were up-to-date, and
not regenerating files locally, leading to this failure:
GEN libvirt.syms
cat: libvirt_access.syms: No such file or directory
cat: libvirt_access_qemu.syms: No such file or directory
cat: libvirt_access_lxc.syms: No such file or directory
make: *** [libvirt.syms] Error 1
We already have a category for generated sym files, which are
intentionally not part of the tarball; stick the access sym
files in that category. The rearrange the declarations a bit
to make it harder to repeat the problem, dropping things that
are now redundant (for example, BUILT_FILES already includes
GENERATED_SYM_FILES, so it does not also need to call out
ACCESS_DRIVER_SYM_FILES).
* src/Makefile.am (USED_SYM_FILES): Don't include generated files.
(GENERATED_SYM_FILES): Access syms files are generated.
(libvirt.syms): Include access syms files here.
(ACCESS_DRIVER_SYMFILES): Rename...
(ACCESS_DRIVER_SYM_FILES): ...for consistency.
Signed-off-by: Eric Blake <eblake@redhat.com>
User namespaces will deny the ability to mount the SELinux
filesystem. This is harmless for libvirt's LXC needs, so the
error can be ignored.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
On Fedora 18, when cross-compiling to mingw with the mingw*-dbus
packages installed, compilation fails with:
CC libvirt_net_rpc_server_la-virnetserver.lo
In file included from /usr/i686-w64-mingw32/sys-root/mingw/include/dbus-1.0/dbus/dbus-connection.h:32:0,
from /usr/i686-w64-mingw32/sys-root/mingw/include/dbus-1.0/dbus/dbus-bus.h:30,
from /usr/i686-w64-mingw32/sys-root/mingw/include/dbus-1.0/dbus/dbus.h:31,
from ../../src/util/virdbus.h:26,
from ../../src/rpc/virnetserver.c:39:
/usr/i686-w64-mingw32/sys-root/mingw/include/dbus-1.0/dbus/dbus-message.h:74:58: error: expected ';', ',' or ')' before 'struct'
I have reported this as a bug against two packages:
- mingw-headers, for polluting the namespace
https://bugzilla.redhat.com/show_bug.cgi?id=980270
- dbus, for not dealing with the pollution
https://bugzilla.redhat.com/show_bug.cgi?id=980278
At least dbus has agreed that a future version of dbus headers will
do s/interface/iface/, regardless of what happens in mingw. But it
is also easy to workaround in libvirt in the meantime, without having
to wait for either mingw or dbus to upgrade.
* src/util/virdbus.h (includes): Undo mingw's pollution so that
dbus doesn't fail.
Signed-off-by: Eric Blake <eblake@redhat.com>
After abf75aea24 the compiler screams:
qemu/qemu_driver.c: In function 'qemuNodeDeviceDetachFlags':
qemu/qemu_driver.c:10693:9: error: 'domain' may be used uninitialized in this function [-Werror=maybe-uninitialized]
pci = virPCIDeviceNew(domain, bus, slot, function);
^
qemu/qemu_driver.c:10693:9: error: 'bus' may be used uninitialized in this function [-Werror=maybe-uninitialized]
qemu/qemu_driver.c:10693:9: error: 'slot' may be used uninitialized in this function [-Werror=maybe-uninitialized]
qemu/qemu_driver.c:10693:9: error: 'function' may be used uninitialized in this function [-Werror=maybe-uninitialized]
Since the other functions qemuNodeDeviceReAttach and qemuNodeDeviceReset
looks exactly the same, I've initialized the variables there as well.
However, I am still wondering why those functions don't matter to gcc
while the first one does.
Since these devices are created for the container.
the owner should be the root user of the container.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
container will create /dev/pts directory in /dev.
the owner of /dev should be the root user of container.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Since these tty devices will be used by container,
the owner of them should be the root user of container.
This patch also adds a new function virLXCControllerChown,
we can use this general function to change the owner of
files.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
user namespace doesn't allow to create devices in
uninit userns. We should create devices on host side.
We first mount tmpfs on dev directroy under state dir
of container. then create devices under this dev dir.
Finally in container, mount the dev directroy created
on host to the /dev/ directroy of container.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
This patch introduces new helper function
virLXCControllerSetupUserns, in this function,
we set the files uid_map and gid_map of the init
task of container.
lxcContainerSetID is used for creating cred for
tasks running in container. Since after setuid/setgid,
we may be a new user. This patch calls lxcContainerSetUserns
at first to make sure the new created files belong to
right user.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Make sure the mapping line contains the root user of container
is the first element of idmap array. So we can get the real
user id on host for the container easily.
This patch also check the map information, User must map
the root user of container to any user of host.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
User namespace will be enabled only when the idmap exist
in configuration.
If you want disable user namespace,just remove these
elements from XML.
If kernel doesn't support user namespace and idmap exist
in configuration file, libvirt lxc will start failed and
return "Kernel doesn't support user namespace" message.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
This patch introduces new element <idmap> for
user namespace. for example
<idmap>
<uid start='0' target='1000' count='10'/>
<gid start='0' target='1000' count='10'/>
</idmap>
this new element is used for setting proc files
/proc/<pid>/{uid_map,gid_map}.
This patch also supports multiple uid/gid elements
setting in XML configuration.
We don't support the semi configuation, user has to
configure uid and gid both.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
By providing the implementation of nodeGetCellsFreeMemory for
the driver. This is all just a matter of properly formatting, in
a way that libvirt like, what Xen provides via libxl_get_numainfo().
[raistlin@Zhaman ~]$ sudo virsh --connect xen:/// freecell --all
0: 25004 KiB
1: 105848 KiB
--------------------
Total: 130852 KiB
Signed-off-by: Dario Faggioli <dario.faggioli@citrix.com>
On mingw, configure sets the name of the lxc symfile to
libvirt_lxc.defs rather than libvirt_lxc.syms. But tarballs
must be arch-independent, regardless of the configure options
used for the tree where we ran 'make dist'. This led to the
following failure in autobuild.sh:
CCLD libvirt-lxc.la
CCLD libvirt-qemu.la
/usr/lib64/gcc/i686-w64-mingw32/4.7.2/../../../../i686-w64-mingw32/bin/ld: cannot find libvirt_lxc.def: No such file or directory
collect2: error: ld returned 1 exit status
make[3]: *** [libvirt-lxc.la] Error 1
make[3]: *** Waiting for unfinished jobs....
We were already doing the right thing with libvirt_qemu.syms.
* src/Makefile.am (EXTRA_DIST): Don't ship a built file which
depends on configure for its final name.
Signed-off-by: Eric Blake <eblake@redhat.com>
Found while trying to cross-compile to mingw:
CC libvirt_driver_remote_la-remote_driver.lo
../../src/remote/remote_driver.c: In function 'doRemoteOpen':
../../src/remote/remote_driver.c:487:23: error: variable 'verify' set but not used [-Werror=unused-but-set-variable]
* src/remote/remote_driver.c (doRemoteOpen): Also ignore 'verify'.
Signed-off-by: Eric Blake <eblake@redhat.com>
iptablesContext holds only 4 pairs of iptables
(table, chain) and there's no need to pass
it around.
This is a first step towards separating bridge_driver.c
in platform-specific parts.
Implement check whether (maximum) vCPUs doesn't exceed machine
type's cpu-max settings.
On older versions of QEMU the check is disabled.
Signed-off-by: Michal Novotny <minovotn@redhat.com>
On Thu, Jun 27, 2013 at 03:56:42PM +0100, Daniel P. Berrange wrote:
> Hi Security Team,
>
> I've discovered a way for an unprivileged user with a readonly connection
> to libvirtd, to crash the daemon.
Ok, the final patch for this is issue will be the simpler variant that
Eric suggested
The embargo can be considered to be lifted on Monday July 1st, at
0900 UTC
The following is the GIT change that DV or myself will apply to libvirt
GIT master immediately before the 1.1.0 release:
>From 177b4165c531a4b3ba7f6ab6aa41dca9ceb0b8cf Mon Sep 17 00:00:00 2001
From: "Daniel P. Berrange" <berrange@redhat.com>
Date: Fri, 28 Jun 2013 10:48:37 +0100
Subject: [PATCH] CVE-2013-2218: Fix crash listing network interfaces with
filters
The virConnectListAllInterfaces method has a double-free of the
'struct netcf_if' object when any of the filtering flags cause
an interface to be skipped over. For example when running the
command 'virsh iface-list --inactive'
This is a regression introduced in release 1.0.6 by
commit 7ac2c4fe62
Author: Guannan Ren <gren@redhat.com>
Date: Tue May 21 21:29:38 2013 +0800
interface: list all interfaces with flags == 0
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This fixes https://bugzilla.redhat.com/show_bug.cgi?id=971325
The problem was that if virPCIGetVirtualFunctions was given the name
of a non-existent interface, it would return to its caller without
initializing the pointer to the array of virtual functions to NULL,
and the caller (virNetDevGetVirtualFunctions) would try to VIR_FREE()
the invalid pointer.
The final error message before the crash would be:
virPCIGetVirtualFunctions:2088 :
Failed to open dir '/sys/class/net/eth2/device':
No such file or directory
In this patch I move the initialization in virPCIGetVirtualFunctions()
to the begining of the function, and also do an explicit
initialization in virNetDevGetVirtualFunctions, just in case someone
in the future adds code into that function prior to the call to
virPCIGetVirtualFunctions.
This fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=979290https://bugzilla.redhat.com/show_bug.cgi?id=979330
The node device driver was written with the assumption that udev would
use a "change" event to notify libvirt of any change to device status
(including the name of the driver it was bound to). It turns out this
is not the case (see Comment 4 of BZ 979290). That means that a
dumpxml for a device would always show whatever driver happened to be
bound at the time libvirt was started (when the node device cache was
built).
There was already code in the driver (for the benefit of the HAL
backend) that updated the driver name from sysfs each time a device's
info was retrieved from the cache. This patch just enables that manual
update for the udev backend as well.
There were two errors, one as a direct result of commit id '8807b285'
and the other from cut-n-paste
TEST: nodedevxml2xmltest
.............. 14 OK
==25735== 3 bytes in 1 blocks are definitely lost in loss record 1 of 24
==25735== at 0x4A0887C: malloc (vg_replace_malloc.c:270)
==25735== by 0x344D2AF275: xmlStrndup (in /usr/lib64/libxml2.so.2.9.1)
==25735== by 0x4D0C767: virNodeDeviceDefParseNode (node_device_conf.c:997)
==25735== by 0x4D0D3D2: virNodeDeviceDefParse (node_device_conf.c:1337)
==25735== by 0x401CA4: testCompareXMLToXMLHelper (nodedevxml2xmltest.c:28)
==25735== by 0x402B2F: virtTestRun (testutils.c:158)
==25735== by 0x401B27: mymain (nodedevxml2xmltest.c:81)
==25735== by 0x40316A: virtTestMain (testutils.c:722)
==25735== by 0x37C1021A04: (below main) (libc-start.c:225)
==25735==
==25735== 16 bytes in 1 blocks are definitely lost in loss record 10 of 24
==25735== at 0x4A08A6E: realloc (vg_replace_malloc.c:662)
==25735== by 0x4C7385E: virReallocN (viralloc.c:184)
==25735== by 0x4C73906: virExpandN (viralloc.c:214)
==25735== by 0x4C73B4A: virInsertElementsN (viralloc.c:324)
==25735== by 0x4D0C84C: virNodeDeviceDefParseNode (node_device_conf.c:1026)
==25735== by 0x4D0D3D2: virNodeDeviceDefParse (node_device_conf.c:1337)
==25735== by 0x401CA4: testCompareXMLToXMLHelper (nodedevxml2xmltest.c:28)
==25735== by 0x402B2F: virtTestRun (testutils.c:158)
==25735== by 0x401B27: mymain (nodedevxml2xmltest.c:81)
==25735== by 0x40316A: virtTestMain (testutils.c:722)
==25735== by 0x37C1021A04: (below main) (libc-start.c:225)
==25735==
PASS: nodedevxml2xmltest
The first error was resolved by adding a missing VIR_FREE(numberStr); in
the new function virNodeDevCapPciDevIommuGroupParseXML().
The second error was a bit more opaque as the error was a result of copying
the free methodolgy of the existing code in virNodeDevCapsDefFree(). The code
would free each of the entries in the array, but not the memory for the
array itself. Added the necessary VIR_FREE(data->pci_dev.iommuGroupDevices)
and while at it added the missing VIR_FREE(data->pci_dev.virtual_functions)
although there wasn't a test that tripped across it (thus it's been lurking
since commit id 'a010165d').
Commit id '53d5967c' introduced the following:
TEST: storagevolxml2argvtest
.............. 14 OK
==25636== 358 (264 direct, 94 indirect) bytes in 1 blocks are definitely lost in loss record 67 of 75
==25636== at 0x4A06B6F: calloc (vg_replace_malloc.c:593)
==25636== by 0x4C95791: virAlloc (viralloc.c:124)
==25636== by 0x4CA0BB4: virCommandNewArgs (vircommand.c:805)
==25636== by 0x4CA0C88: virCommandNew (vircommand.c:789)
==25636== by 0x408602: virStorageBackendCreateQemuImgCmd (storage_backend.c:849)
==25636== by 0x405427: testCompareXMLToArgvHelper (storagevolxml2argvtest.c:61)
==25636== by 0x4064DF: virtTestRun (testutils.c:158)
==25636== by 0x40516F: mymain (storagevolxml2argvtest.c:195)
==25636== by 0x406B1A: virtTestMain (testutils.c:722)
==25636== by 0x37C1021A04: (below main) (libc-start.c:225)
==25636==
PASS: storagevolxml2argvtest
Commit '861d4056' introduced the following:
TEST: networkxml2xmltest
.................. 18 OK
==25504== 7 bytes in 1 blocks are definitely lost in loss record 5 of 23
==25504== at 0x4A0887C: malloc (vg_replace_malloc.c:270)
==25504== by 0x37C1085D71: strdup (strdup.c:42)
==25504== by 0x4CB835F: virStrdup (virstring.c:546)
==25504== by 0x4CC5179: virXPathString (virxml.c:90)
==25504== by 0x4CC75C2: virNetDevVlanParse (netdev_vlan_conf.c:78)
==25504== by 0x4CF928A: virNetworkPortGroupParseXML (network_conf.c:1555)
==25504== by 0x4CFE385: virNetworkDefParseXML (network_conf.c:2049)
==25504== by 0x4D0113B: virNetworkDefParseNode (network_conf.c:2273)
==25504== by 0x4D01254: virNetworkDefParse (network_conf.c:2234)
==25504== by 0x401E80: testCompareXMLToXMLHelper (networkxml2xmltest.c:32)
==25504== by 0x402D4F: virtTestRun (testutils.c:158)
==25504== by 0x401CE9: mymain (networkxml2xmltest.c:110)
==25504==
PASS: networkxml2xmltest
Also changed the label from error to cleanup and adjusted code since it's
all one exit path
The IF_MAXUNIT macro is not present on all BSDs, so
make its use conditional, to avoid breaking OS-X.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The 'in_addr_t' typedef is not present in Mingw64 headers.
Instead we can use the more portable 'struct in_addr' and
then access its 's_addr' field.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The udev based interface backend did not allow querying data over a
read-only connection which is different than how the netcf backend
operates. This brings the behavior inline with the default, netcf
backend.
When creating a virtual FC HBA with virsh/libvirt API, an error message
will be returned: "error: Node device not found",
also the 'nodedev-dumpxml' shows wrong information of wwpn & wwnn
for the new created device.
Signed-off-by: xschen@tnsoft.com.cn
This reverts f90af69 which switched wwpn & wwwn in the wrong place.
https://www.kernel.org/doc/Documentation/scsi/scsi_fc_transport.txt
Building on FreeBSD had this linker error:
/work/a/ports/devel/libvirt/work/libvirt-1.1.0/src/.libs/libvirt.so:
undefined reference to `virPCIDeviceAddressParse'
This was caused by the new use of virPCIDeviceAddressParse in a
portion of virpci.c that wasn't linux-only (in commit 72c029d8). The
problem was that virPCIDeviceAddressParse had originally been defined
inside #ifdef _linux (because it was only used by another function
that was inside the same ifdef).
The solution is to move it out to the part of virpci.c that is
compiled on all platforms.
(Because the portion that was "moved" was 40-50 lines, but only moved
up by 15 lines, the diff for the patch is less than non-informative -
rather than showing that part that I moved, it shows the bit that was
previously before the moved part, and now sits *after* it.)
Implicit controllers may be dependent on device definitions altered
in a post-parse callback. Specifically, if a console device is
defined without the target type, the type will be set in QEMU's
callback. In the case of s390, this is virtio, which requires
an implicit virtio-serial controller.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
If networkUnplugBandwidth is called on a network which has
no bandwidth defined, print a warning instead of crashing.
This can happen when destroying a domain with bandwidth if
bandwidth was removed from the network after the domain was
started.
https://bugzilla.redhat.com/show_bug.cgi?id=975359
This includes adding it to the nodedev parser and formatter, docs, and
test.
An example of the new iommuGroup element that is a part of the output
from "virsh nodedev-dumpxml" (virNodeDeviceGetXMLDesc()):
<device>
<name>pci_0000_02_00_1</name>
<capability type='pci'>
...
<iommuGroup number='12'>
<address domain='0x0000' bus='0x02' slot='0x00' function='0x0'/>
<address domain='0x0000' bus='0x02' slot='0x00' function='0x1'/>
</iommuGroup>
</capability>
</device>
Any device which belongs to an "IOMMU group" (used by vfio) will
have links to all devices of its group listed in
/sys/bus/pci/$device/iommu_group/devices;
/sys/bus/pci/$device/iommu_group is actually a link to
/sys/kernel/iommu_groups/$n, where $n is the group number (there
will be a corresponding device node at /dev/vfio/$n once the
devices are bound to the vfio-pci driver)
The following functions are added:
virPCIDeviceGetIOMMUGroupList
Gets a virPCIDeviceList with one virPCIDeviceList for each device
in the same IOMMU group as the provided virPCIDevice (a copy of the
original device object is included in the list.
virPCIDeviceAddressIOMMUGroupIterate
Calls the function @actor once for each device in the group that
contains the given virPCIDeviceAddress.
virPCIDeviceAddressGetIOMMUGroupAddresses
Fills in a virPCIDeviceAddressPtr * with an array of
virPCIDeviceAddress, one for each device in the iommu group of the
provided virPCIDeviceAddress (including a copy of the original).
virPCIDeviceAddressGetIOMMUGroupNum
Returns the group number as an int (a valid group number will always
be 0 or greater). If there is no iommu_group link in the device's
directory (usually indicating that vfio isn't loaded), -2 will be
returned. On any real error, -1 will be returned.
We only break out of the while loop if *content is an empty string.
However the buffer has been allocated to BUFSIZ + 1 (8193 in my case),
but it gets overwritten in the next for iteration.
Move VIR_FREE right before we overwrite it to avoid the leak.
==5777== 16,386 bytes in 2 blocks are definitely lost in loss record 1,022 of 1,027
==5777== by 0x5296E28: virReallocN (viralloc.c:184)
==5777== by 0x52B0C66: virFileReadLimFD (virfile.c:1137)
==5777== by 0x52B0E1A: virFileReadAll (virfile.c:1199)
==5777== by 0x529B092: virCgroupGetValueStr (vircgroup.c:534)
==5777== by 0x529AF64: virCgroupMoveTask (vircgroup.c:1079)
Introduced by 83e4c77.
https://bugzilla.redhat.com/show_bug.cgi?id=978352
Don't check for '\n' at the end of file if zero bytes were read.
Found by valgrind:
==404== Invalid read of size 1
==404== at 0x529B09F: virCgroupGetValueStr (vircgroup.c:540)
==404== by 0x529AF64: virCgroupMoveTask (vircgroup.c:1079)
==404== by 0x1EB475: qemuSetupCgroupForEmulator (qemu_cgroup.c:1061)
==404== by 0x1D9489: qemuProcessStart (qemu_process.c:3801)
==404== by 0x18557E: qemuDomainObjStart (qemu_driver.c:5787)
==404== by 0x190FA4: qemuDomainCreateWithFlags (qemu_driver.c:5839)
Introduced by 0d0b409.
https://bugzilla.redhat.com/show_bug.cgi?id=978356
Although SRIOV network cards support setting a vlan tag on their
virtual functions, and although setting this vlan tag via a <vlan>
element in a domain's <interface> works, setting a vlan tag for these
devices in a <network> definition, or in a network <portgroup>
definition is also supposed to work (and the comment that validates
<vlan> usage even says that!). However, the check to allow it only
checked for an openvswitch network, so attempts to add <vlan> to a
network of type='hostdev' would fail.
A loop in qemuPrepareHostdevPCIDevices() intended to cycle through all
the objects on the list pcidevs was doing "while (listcount > 0)", but
nothing in the body of the loop was reducing the size of the list - it
was instead removing items from a *different* list. It has now been
safely changed to a for() loop.
(This isn't as bad as it sounds - it's only a problem in case of an
OOM error.)
qemuGetActivePciHostDeviceList() had been creating a list that
contained pointers to objects that were also on the activePciHostdevs
list. In case of an OOM error, this newly created list would be
virObjectUnref'ed, which would cause everything on the list to be
freed. But all of those objects would still be on the
activePciHostdevs list, which could have very bad consequences if that
list was ever again accessed.
The solution used here is to populate the new list with *copies* of
the objects from the original list. It turns out that on return from
qemuGetActivePciHostDeviceList(), the caller would almost immediately
go through all the device objects and "steal" them (i.e. remove the
pointer from the list but not delete it) all from either one list or
the other; we now instead just *delete* (remove from the list and
free) each device from one list or the other, so in the end we have
the same state.
The "fix" I pushed a few commits ago would still leak a virPCIDevice
in case of an OOM error. Although it's inconsequential in practice,
this patch satisfies my OCD.
The same strings were being re-created multiple times just to save
declaring a new variable. In the meantime, the use of the generic
variable names led to confusion when trying to follow the code. This
patch creates strings for:
stubDriverName (was called "driver" in original args)
stubDriverPath ("/sys/bus/pci/drivers/${stubDriverName}")
driverLink ("${device}/driver")
oldDriverName (the final component of path linked to by
"${device}/driver")
oldDriverPath ("/sys/bus/pci/drivers/${oldDriverName}")
then re-uses them as necessary.
I realized after the fact that it's probably better in the long run to
give this function a name that matches the name of the link used in
sysfs to hold the group (iommu_group).
I'm changing it now because I'm about to add several more functions
that deal with iommu groups.
The driver arg to virPCIDeviceDetach is no longer used (the name of the stub driver is now set in the virPCIDevice object, and virPCIDeviceDetach retrieves it from there). Remove it.
Commit 861d40565 added code (my personal change to "clean up" the
submitter's code, *not* the fault of the submitter) that dereferenced
virtVlan without first checking for NULL. This patch fixes that and,
as part of the fix, cleans up some unnecessary obtuseness.
virNetDevBridgeSetSTPDelay accepts delay in milliseconds,
but BSD implementation was expecting seconds. Therefore,
it was working correctly only with delay == 0.
This patch adds functionality to allow libvirt to configure the
'native-tagged' and 'native-untagged' modes on openvswitch networks.
Signed-off-by: Laine Stump <laine@redhat.com>
I just learned that VFIO resets PCI devices when they are assigned to
guests / returned to the host, so it is redundant for libvirt to reset
the devices. This patch inhibits calling virPCIDeviceReset to devices
that will be/were assigned using VFIO.
This patch introduces two new APIs virDomainMigrate3 and
virDomainMigrateToURI3 that may be used in place of their older
variants. These new APIs take optional migration parameters (such as
bandwidth, domain XML, ...) in an array of virTypedParameters, which
makes adding new parameters easier as there's no need to introduce new
APIs whenever a new migration parameter needs to be added. Both APIs are
backward compatible and will automatically use older migration calls in
case the new calls are not supported as long as the typed parameters
array does not contain any parameter which was not supported by the
older calls.
All APIs that take typed parameters are only using params address in
their entry point debug messages. With the new VIR_TYPED_PARAMS_DEBUG
macro, all functions can easily log all individual typed parameters
passed to them.
When unsupported parameter is passed to virTypedParamsValidate,
VIR_ERR_ARGUMENT_UNSUPPORTED should be returned rather than
VIR_ERR_INVALID_ARG, which is more appropriate for supported parameters
used incorrectly.
virPCIDeviceDetach would previously sometimes consume the input device
object (to put it on the inactive list) and sometimes not. Avoiding
memory leaks required checking beforehand to see if the device was
already on the list, and freeing the device object in the caller only
if there wasn't already an identical object on the inactive list.
This patch makes it consistent - virPCIDeviceDetach will *never*
consume the input virPCIDevice object; if it needs to put one on the
inactive list, it will create a copy and put *that* on the list. This
way the caller knows that it is always their responsibility to free
the device object they created.
virPCIDeviceReattach was making the assumption that the dev object
given to it was one and the same with the dev object on the
inactiveDevs list. If that had been the case, it would not need to
free the dev object it removed from the inactive list, because the
caller of virPCIDeviceReattach always frees the dev object that it
passes in. Since the dev object passed in is *never* the same object
that's on the list (it is a different object with the same name and
attributes, created just for the purpose of searching for the actual
object), simply doing a "ListSteal" to remove the object from the list
results in one leaked object; we need to actually free the object
after removing it from the list.
* virPCIDeviceFindByIDs - find a device on a list w/o creating an object
This makes searching for an existing device on a list lighter weight.
* virPCIDeviceCopy - make a copy of an existing virPCIDevice object.
* virPCIDeviceGetDriverPathAndName - construct new strings containing
1) the name of the driver bound to this device.
2) the full path to the sysfs config for that driver.
(This code was lifted from virPCIDeviceUnbindFromStub, and replaced
there with a call to this new function).
Previously stubDriver was always set from a string literal, so it was
okay to use a const char * that wasn't freed when the virPCIDevice was
freed. This will not be the case in the near future, so it is now a
char* that is allocated in virPCIDeviceSetStubDriver() and freed
during virPCIDeviceFree().
libxl supports the LIBXL_DISK_BACKEND_QDISK disk backend, where qemu
is used to provide the disk backend. This patch simply maps the
existing <driver name='qemu'/> to LIBXL_DISK_BACKEND_QDISK.
Specifying an unsupported disk format with the tap driver resulted in
a less than helpful error message
error: Failed to start domain test-hvm
error: internal error libxenlight does not support disk driver qed
Change the message to state that the qed format is not supported by
the tap driver, e.g.
error: Failed to start domain test-hvm
error: internal error libxenlight does not support disk format qed
with disk driver tap
While at it, check for unsupported formats in the other driver
backends.
Add a script which parses the driver API code and validates
that every API registered in a virNNNDriverPtr table contains
an ACL check matching the API name.
NB this currently whitelists a few xen driver functions
which are temporarily lacking in access control checks.
The xen driver is considered insecure until these are
fixed.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Extend the 'gendispatch.pl' script to be able to generate
three new types of file.
- 'aclheader' - defines signatures of helper APIs for
doing authorization checks. There is one helper API
for each API requiring an auth check. Any @acl
annotations result in a method being generated with
a suffix of 'EnsureACL'. If the ACL check requires
examination of flags, an extra 'flags' param will be
present. Some examples
extern int virConnectBaselineCPUEnsureACL(void);
extern int virConnectDomainEventDeregisterEnsureACL(virDomainDefPtr domain);
extern int virDomainAttachDeviceFlagsEnsureACL(virDomainDefPtr domain, unsigned int flags);
Any @aclfilter annotations resuilt in a method being
generated with a suffix of 'CheckACL'.
extern int virConnectListAllDomainsCheckACL(virDomainDefPtr domain);
These are used for filtering individual objects from APIs
which return a list of objects
- 'aclbody' - defines the actual implementation of the
methods described above. This calls into the access
manager APIs. A complex example:
/* Returns: -1 on error (denied==error), 0 on allowed */
int virDomainAttachDeviceFlagsEnsureACL(virConnectPtr conn,
virDomainDefPtr domain,
unsigned int flags)
{
virAccessManagerPtr mgr;
int rv;
if (!(mgr = virAccessManagerGetDefault()))
return -1;
if ((rv = virAccessManagerCheckDomain(mgr,
conn->driver->name,
domain,
VIR_ACCESS_PERM_DOMAIN_WRITE)) <= 0) {
virObjectUnref(mgr);
if (rv == 0)
virReportError(VIR_ERR_ACCESS_DENIED, NULL);
return -1;
}
if (((flags & (VIR_DOMAIN_AFFECT_CONFIG|VIR_DOMAIN_AFFECT_LIVE)) == 0) &&
(rv = virAccessManagerCheckDomain(mgr,
conn->driver->name,
domain,
VIR_ACCESS_PERM_DOMAIN_SAVE)) <= 0) {
virObjectUnref(mgr);
if (rv == 0)
virReportError(VIR_ERR_ACCESS_DENIED, NULL);
return -1;
}
if (((flags & (VIR_DOMAIN_AFFECT_CONFIG)) == (VIR_DOMAIN_AFFECT_CONFIG)) &&
(rv = virAccessManagerCheckDomain(mgr,
conn->driver->name,
domain,
VIR_ACCESS_PERM_DOMAIN_SAVE)) <= 0) {
virObjectUnref(mgr);
if (rv == 0)
virReportError(VIR_ERR_ACCESS_DENIED, NULL);
return -1;
}
virObjectUnref(mgr);
return 0;
}
- 'aclsyms' - generates a linker script to export the
APIs to drivers. Some examples
virConnectBaselineCPUEnsureACL;
virConnectCompareCPUEnsureACL;
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce annotations to all RPC messages to declare what
access control checks are required. There are two new
annotations defined:
@acl: <object>:<permission>
@acl: <object>:<permission>:<flagname>
Declare the access control requirements for the API. May be repeated
multiple times, if multiple rules are required.
<object> is one of 'connect', 'domain', 'network', 'storagepool',
'interface', 'nodedev', 'secret'.
<permission> is one of the permissions in access/viraccessperm.h
<flagname> indicates the rule only applies if the named flag
is set in the API call
@aclfilter: <object>:<permission>
Declare an access control filter that will be applied to a list
of objects being returned by an API. This allows the returned
list to be filtered to only show those the user has permissions
against
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Add an access control driver that uses the pkcheck command
to check authorization requests. This is fairly inefficient,
particularly for cases where an API returns a list of objects
and needs to check permission for each object.
It would be desirable to use the polkit API but this links
to glib with abort-on-OOM behaviour, so can't be used. The
other alternative is to speak to dbus directly
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Add a new 'access_drivers' config parameter to the libvirtd.conf
configuration file. This allows admins to setup the default
access control drivers to use for API authorization. The same
driver is to be used by all internal drivers & APIs
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The access control checks in the 'connectOpen' driver method
will require 'conn->driver' to be non-NULL. Set this before
running the 'connectOpen' method and NULL-ify it again on
failure.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This patch introduces the virAccessManagerPtr class as the
interface between virtualization drivers and the access
control drivers. The viraccessperm.h file defines the
various permissions that will be used for each type of object
libvirt manages
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
It's not used anywhere except for the switch in
virStorageBackendCreateQemuImgOpts, where leaving it in causes
a dead code coverity warning and omitting it breaks compilation
because of unhandled enum value.
Introduced by 6298f74.
libxl contains logic to determine an appropriate devid for new devices
that do not specify one in their configuration. For all device types
except NICs, the libxl driver allows libxl to determine devid. Do the
same for NICs.
Add <features> and <compat> elements to volume target XML.
<compat> is a string which for qcow2 represents the QEMU version
it should be compatible with. Valid values are 0.10 and 1.1.
1.1 is implicit if the <features> element is present, otherwise
qemu-img default is used. 0.10 can be specified to explicitly
create older images after the qemu-img default changes.
<features> contains optional features, so far
<lazy_refcounts/> is available, which enables caching of reference
counters, improving performance for snapshots.
Detect qcow2 images with version 3 in the image header as
VIR_STORAGE_FILE_QCOW2.
These images have a feature bitfield, with just one feature supported
so far: lazy_refcounts.
The header length changed too, moving the location of the backing
format name.
Add new CPU features for HyperV:
vapic for virtual APIC support
spinlocks for setting spinlock support
<features>
<hyperv>
<vapic state='on'/>
<spinlocks state='on' retries='4096'/>
</hyperv>
</features>
https://bugzilla.redhat.com/show_bug.cgi?id=784836
Commit 752596b5 broke the build with -Werror
qemu/qemu_hotplug.c: In function 'qemuDomainChangeGraphics':
qemu/qemu_hotplug.c:1980:39: error: declaration of 'listen' shadows a
global declaration [-Werror=shadow]
Fix with s/listen/newlisten/
This fixes the problem reported in:
https://bugzilla.redhat.com/show_bug.cgi?id=972690
When checking for a collision of a new libvirt network's subnet with
any existing routes, we read all of /proc/net/route into memory, then
parse all the entries. The function that we use to read this file
requires a "maximum length" parameter, which had previously been set
to 64*1024. As each line in /proc/net/route is 128 bytes, this would
allow for a maximum of 512 entries in the routing table.
This patch increases that number to 128 * 100000, which allows for
100,000 routing table entries. This means that it's possible that 12MB
would be allocated, but that would only happen if there really were
100,000 route table entries on the system, it's only held for a very
short time.
Since there is no method of specifying and unlimited max (and that
would create a potential denial of service anyway) hopefully this
limit is large enough to accomodate everyone.
Currently, we have a bug when updating a graphics device. A graphics device can
have a listen address set. This address is either defined by user (in which case
it's type is VIR_DOMAIN_GRAPHICS_LISTEN_TYPE_ADDRESS) or it can be inherited
from a network (in which case it's type is
VIR_DOMAIN_GRAPHICS_LISTEN_TYPE_NETWORK). However, in both cases we have a
listen address to process (e.g. during migration, as I've tried to fix in
7f15ebc7).
Later, when a user tries to update the graphics device (e.g. set a password),
we check if listen addresses match the original as qemu doesn't know how to
change listen address yet. Hence, users are required to not change the listen
address. The implementation then just dumps listen addresses and compare them.
Previously, while dumping the listen addresses, NULL was returned for NETWORK.
After my patch, this is no longer true, and we get a listen address for olddev
even if it is a type of NETWORK. So we have a real string on one side, the NULL
from user's XML on the other side and hence we think user wants to change the
listen address and we refuse it.
Therefore, we must take the type of listen address into account as well.
Do not leave uninitialized variables, not all parameters are set in
libxlMake*.
Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
libxl uses some xenstore entries for hints in memory management
(especially when starting new domain). This includes dom0 memory limit
and Xen free memory margin, based on current system state. Entries are
created at first function usage, so force such call at daemon startup,
which most likely will be before any domain startup.
Also prevent automatic memory management if dom0_mem= option passed to
xen hypervisor - it is known to be incompatible with autoballoon.
Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
As a consequence of the cgroup layout changes from commit 'cfed9ad4', the
lxcDomainGetSchedulerParameters[Flags]()' and lxcGetSchedulerType() APIs
failed to return data for a non running domain. This can be seen through
a 'virsh schedinfo <domain>' command which returns:
Scheduler : Unknown
error: Requested operation is not valid: cgroup CPU controller is not mounted
Prior to that change a non running domain would return:
Scheduler : posix
cpu_shares : 0
vcpu_period : 0
vcpu_quota : 0
emulator_period: 0
emulator_quota : 0
This patch will restore the capability to return configuration only data
for a non running domain regardless of whether cgroups are available.
As a consequence of the cgroup layout changes from commit '632f78ca', the
qemuDomainGetSchedulerParameters[Flags]()' and qemuGetSchedulerType() APIs
failed to return data for a non running domain. This can be seen through
a 'virsh schedinfo <domain>' command which returns:
Scheduler : Unknown
error: Requested operation is not valid: cgroup CPU controller is not mounted
Prior to that change a non running domain would return:
Scheduler : posix
cpu_shares : 0
vcpu_period : 0
vcpu_quota : 0
emulator_period: 0
emulator_quota : 0
This patch will restore the capability to return configuration only data
for a non running domain regardless of whether cgroups are available.
Just to reduce the indentation levels. Remove the unneeded
NULL check for disk->file, as virBufferEscapeString doesn't
print anything with NULL arguments.
This flag is meant for errors happening on the source of the migration
and isn't used on the destination. To allow better migration
compatibility, don't propagate it to the destination.
Paolo Bonzini pointed out that it's actually possible to migrate a qemu
instance that was paused due to I/O error and it will be able to work on
the destination if the storage is accessible.
This patch introduces flag VIR_MIGRATE_ABORT_ON_ERROR that cancels the
migration in case an I/O error happens while it's being performed and
allows migration without this flag. This flag can be possibly used for
other error reasons that may be introduced in the future.
Currently, we wait for SPICE to migrate in the very same loop where we
wait for qemu to migrate. This has a disadvantage of slowing seamless
migration down. One one hand, we should not kill the domain until all
SPICE data has been migrated. On the other hand, there is no need to
wait in the very same loop and hence slowing down 'cont' on the
destination. For instance, if users are watching a movie, they can
experience the movie to be stopped for a couple of seconds, as
processors are not running nor on src nor on dst as libvirt waits for
SPICE to migrate. We should move the waiting phase to migration CONFIRM
phase.
The xml outputed by HAL backend for scsi generic device:
<device>
<name>pci_8086_2922_scsi_host_scsi_device_lun0_scsi_generic</name>
<path>/sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/scsi_generic/sg0</path>
<parent>pci_8086_2922_scsi_host_scsi_device_lun0</parent>
<capability type='scsi_generic'>
<char>/dev/sg0</char>
</capability>
</device>
Since scsi generic device doesn't have DEVTYPE property set, the
only way to know if it's a scsi generic device or not is to read
the "SUBSYSTEM" property.
The XML of the scsi generic device will be like:
<device>
<name>scsi_generic_sg0</name>
<path>/sys/devices/pci0000:00/0000:00:1f.2/ata1/host0/target0:0:0/0:0:0:0/scsi_generic/sg0</path>
<parent>scsi_0_0_0_0</parent>
<capability type='scsi_generic'>
<char>/dev/sg0</char>
</capability>
</device>
When qemu >= 1.20, it is safe to use -device for primary video
device as described in 4c993d8ab.
So, we are missing the cap flag in QMP capabilities detection, this
flag can be initialized safely in virQEMUCapsInitQMPBasic.
Checking if the "devtype" is NULL along with each "if" statements
is bad. It wastes the performance, and also not good for reading.
And also when the "devtype" is NULL, the logic is also not clear.
This reorgnizes the logic of with "if...else" and a bunch of "else if".
Other changes:
* Change the function style.
* Remove the useless debug statement.
* Get rid of the goto
* New helper udevDeviceHasProperty to simplify the logic for checking
if a property is existing for the device.
* Add comment to clarify "PCI devices don't set the DEVTYPE property"
* s/sysfs path/sysfs name/, as udev_device_get_sysname returns the
name instead of the full path. E.g. "sg0"
* Refactor the comment for setting VIR_NODE_DEV_CAP_NET cap type
a bit.
The name format is constructed by libvirt, it's not that clear to
get what the device's sysfs path should be. This exposes the device's
sysfs path by a new tag <path>.
Since the sysfspath is filled during enumerating the devices by
either udev or HAL. It's an output-only tag.
Call virLogVMessage instead of virLogMessage, since libudev
called us with a va_list object, not a list of arguments.
Honor message priority and strip the trailing newline.
https://bugzilla.redhat.com/show_bug.cgi?id=969152
Without the socket path explicitly specified, the remote driver tried to
connect to the "/system" instance socket even if "/session" was
specified in the uri. With this patch this configuration now produces an
error.
It is still possible to initiate a session connection with specifying
the path to the socket manually and also manually starting the session
daemon. This was also possible prior to this patch,
This is a minimal fix. We may decide to support remote session
connections using ssh but this will require changes to the remote driver
code so this fix shouldn't cause regressions in the case we decide to do
that.
When creating a timer/event handler reference counting is used. So it could
be possible (in theory) that libxlDomainObjPrivateFree is called with
reference counting >1. The problem is that libxlDomainObjPrivateFree leave
the object in an invalid state with ctx freed (but still having dandling
pointer). This can lead timer/event handler to core.
This patch implements a dispose method for libxlDomainObjPrivate, and moves
freeing the libxl ctx to the dispose method, ensuring the ctx is valid while
the object's reference count is > 0.
Signed-off-by: Frediano Ziglio <frediano.ziglio@citrix.com>
Actually only those interface types are handled correctly so reject
others instead of ignoring settings (i.e. treating as bridge/ethernet
anyway).
Also allow <script/> in 'ethernet' (which should be the only
script-allowing type). Keep <script/> allowed in bridge to be compatible
with legacy 'xen' driver.
Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Convert input XML to migratable before using it in
qemuDomainSaveImageOpen.
XML in the save image is migratable, i.e. doesn't contain implicit
controllers. If these controllers were in a non-default order in the
input XML, the ABI check would fail. Removing and re-adding these
controllers fixes it.
https://bugzilla.redhat.com/show_bug.cgi?id=834196
The legacy xen toolstack will set pygrub as the bootloader if not
specified. For compatibility, do the same in the libxl driver
iff not using direct kernel boot.
Currently, the libxl driver reports a connection type of "xenlight".
To be compatible with the legacy Xen driver, it should return "Xen".
Note: I noticed this while testing the libxl driver on OpenStack.
After switching my Xen compute nodes to use the libxl stack, I
could no longer launch instances on those nodes since
hypervisor_type was reported as "xenlight" instead of "xen".
During a live migration the guest may receive a disk access I/O error.
In this state the guest is unable to continue running on a remote host
after migration as some state may be present in the kernel and not
migrated.
With this patch, the migration is canceled in such case so it can either
continue on the source if the I/O issues are recovered or has to be
destroyed anyways.
https://bugzilla.redhat.com/show_bug.cgi?id=971485
As of d7f9d82753 we copy the listen
address from the qemu.conf config file in case none has been provided
via XML. But later, when migrating, we should not include such listen
address in the migratable XML as it is something autogenerated, not
requested by user. Moreover, the binding to the listen address will
likely fail, unless the address is '0.0.0.0' or its IPv6 equivalent.
This patch introduces a new boolean attribute to virDomainGraphicsListenDef
to distinguish autofilled listen addresses. However, we must keep the
attribute over libvirtd restarts, so it must be kept within status XML.
This patch fixes changes done in commit 29c1e913e4
that was pushed without implementing review feedback.
The flag introduced by the patch is changed to VIR_DOMAIN_VCPU_GUEST and
documentation makes the difference between regular hotplug and this new
functionality more explicit.
The virsh options that enable the use of the new flag are changed to
"--guest" and the documentation is fixed too.
virProcessGetNamespaces() opens files in /proc/XXX/ns/ which will
later be passed to setns(). We have to make sure that the file
descriptors in the array are in the correct order. In particular
the 'user' namespace must be first otherwise setns() may fail
for other namespaces.
The order has been taken from util-linux's sys-utils/nsenter.c
Also we must ignore EINVAL in setns() which occurs if the
namespace associated with the fd, matches the calling process'
current namespace.
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently, there's a path to use the ncpuinfo variable uninitialized,
which leads to a compiler warning:
qemu/qemu_driver.c: In function 'qemuDomainGetVcpusFlags':
qemu/qemu_driver.c:4573:9: error: 'ncpuinfo' may be used
uninitialized in this function [-Werror=maybe-uninitialized]
for (i = 0; i < ncpuinfo; i++) {
^
This patch implements support for the "cpu-add" QMP command that plugs
CPUs into a live guest. The "cpu-add" command was introduced in QEMU
1.5. For the hotplug to work machine type "pc-i440fx-1.5" is required.
This flag will allow to use qemu guest agent commands to disable
(offline) and enable (online) processors in a live guest that has the
guest agent running.
The qemu guest agent allows to online and offline CPUs from the
perspective of the guest. This patch adds helpers that call
'guest-get-vcpus' and 'guest-set-vcpus' guest agent functions and
convert the data for internal libvirt usage.
A few things have changed in the VirtualBox API - some small
(capitalizations of things in function names like Ip to IP
and Dhcp to DHCP) and some much larger (FindMedium is superceded
by OpenMedium). The biggest change for the sake of this patch
is the signature of CreateMachine is quite a bit different. Using
the Oracle source as a guide, to spin up a VM with a given UUID,
it looks like a text flag has to be passed in a new argument to
CreateMachine. This flag is built in the VirtualBox 4.2 specific
ifdefs and is kind of ugly but works. Additionally, there is now
(unused) VM groups support in CreateMachine and the previous
'osTypeId' arg is currently set to nsnull as in the Oracle code.
The FindMedium to OpenMedium changes were more straightforward
and are pretty clear. The rest of the vbox template changes are
basically spelling/capitalization changes from the looks of things.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
iscsiadm now supports specifying hostnames in the portal argument [1]
Instead of resolving the hostname to a single IPv4 address, pass the
hostname to isciadm, allowing IPv6 targets to work.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=624437
https://bugzilla.redhat.com/show_bug.cgi?id=964177
Though both libvirt and QEMU's document say RTC_CHANGE returns
the offset from the host UTC, qemu actually returns the offset
from the specified date instead when specific date is provided
(-rtc base=$date).
It's not safe for qemu to fix it in code, it worked like that
for 3 years, changing it now may break other QEMU use cases.
What qemu tries to do is to fix the document:
http://lists.gnu.org/archive/html/qemu-devel/2013-05/msg04782.html
And in libvirt side, instead of replying on the value from qemu,
this converts the offset returned from qemu to the offset from
host UTC, by:
/*
* a: the offset from qemu RTC_CHANGE event
* b: The specified date (-rtc base=$date)
* c: the host date when libvirt gets the RTC_CHANGE event
* offset: What libvirt will report
*/
offset = a + (b - c);
The specified date (-rtc base=$date) is recorded in clock's def as
an internal only member (may be useful to exposed outside?).
Internal only XML tag "basetime" is introduced to not lose the
guest's basetime after libvirt restarting/reloading:
<clock offset='variable' adjustment='304' basis='utc' basetime='1370423588'/>
Setting of local variables in virStorageBackendCreateQemuImgCmd was
unnecessarily cluttered with ternary operators and repeated testing of
of conditions.
This patch refactors the function to use if statements and improves
error reporting in case inputvol is specified but does not contain
target path. Previously we would complain about "unknown storage vol
type 0" instead of the actual problem.
After fixing an invalid usage of virDomainNetDef in OpenVZ driver,
a coverage issue appeared. This was caused by a still invalid usage
of net->data.ethernet.dev for non ethernet networking.
Currently, a listen address for a SPICE server can be specified. Later,
when the domain is migrated, we need to relocate the graphics which
involves telling new destination to the SPICE server. However, we can't
just assume the listen address is the new location, because the listen
address can be ANYCAST (0.0.0.0 for IPv4, :: for IPv6). In which case,
we want to pass the remote hostname. But there are some troubles with
ANYCAST. In both IPv4 and IPv6 it has many ways for specifying such
address. For instance, in IPv4: 0, 0.0, 0.0.0, 0.0.0.0. The number of
variations gets bigger in IPv6 world. Hence, in order to check for
ANYCAST address sanely, we should take the provided listen address,
parse it and format back in it's full form. Which is exactly what this
patch does.
Such as on FreeBSD. Broken in commit aa2a4cff7.
* src/util/virstoragefile.c (virStorageFileResize): Add missing ';',
mark conditionally unused variables.
Signed-off-by: Eric Blake <eblake@redhat.com>
By default files in a FUSE mount can only be accessed by the
user which created them, even if the file permissions would
otherwise allow it. To allow other users to access the FUSE
mount the 'allow_other' mount option must be used. This bug
prevented non-root users in an LXC container from reading
the /proc/meminfo file.
https://bugzilla.redhat.com/show_bug.cgi?id=967977
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Earlier commit f7e8653f dropped support for using LXC with
kernels having single-instance devpts filesystem from the
LXC controller. It forgot to remove the same code from the
LXC container setup.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
As the document for "virsh-resize" says:
<...>
Attempts to shrink the volume will fail unless I<--shrink> is present;
</...>
This makes sense as it at least prevent the user shrinking the important
data of volume without a notice.
The document for "vol-resize" says the new capacity will be sparse
unless "--allocate" is specified, however, the "--allocate" flag
is never implemented. This implements the "--allocate" flag for
fs backend's raw type volume, based on posix_fallocate and the
syscall SYS_fallocate.
The work was done at the time of snapshot xmlstring parsing
if (offline && def->memory &&
def->memory != VIR_DOMAIN_SNAPSHOT_LOCATION_NONE) {
virReportError(...);
}
This patch is in relation to Bug 966449:
https://bugzilla.redhat.com/show_bug.cgi?id=966449
This is a patch addressing the coredump.
Thread 1 must be calling nwfilterDriverRemoveDBusMatches(). It does so with
nwfilterDriverLock held. In the patch below I am now moving the
nwfilterDriverLock(driverState) further up so that the initialization, which
seems to either take a long time or is entirely stuck, occurs with the lock
held and the shutdown cannot occur at the same time.
Remove the lock in virNWFilterDriverIsWatchingFirewallD to avoid
double-locking.
OpenVZ was accessing ethernet data to obtain the guest iface name
regardless the domain is configured to use ethernet or bridged
networking. This prevented the guest network interface to be rightly
named for bridged networking.
The RPC limits for cpu maps didn't allow to use libvirt on ultra big
boxes. This patch increases size of the limits to support a maximum of
16384 cpus on the host with a maximum of 4096 cpus per guest.
The full cpu map of such a system takes 8 megabytes and the map for
vcpu pinning is 2 kilobytes long.
With unknown good reasons, the attribute "bus" of scsi device
address is always set to 0, same for attribute "target". (See
virDomainDiskDefAssignAddress).
Though we might need to change the algorithm to honor "bus"
and "target" too, that's a different issue. The address generator
for scsi host device in this patch just follows the unknown
good reasons, only considering the "controller" and "unit".
It walks through all scsi controllers and their units, to see
if the address $controller:0:0:$unit can be used (if not used
by any disk or scsi host device yet), if found one, it sits on
it, otherwise, it creates a new controller (actually the controller
is implicitly created by someone else), and sits on
$new_controller:0:0:0 instead.
This should resolve:
https://bugzilla.redhat.com/show_bug.cgi?id=959191
The problem was that qemuUpdateActivePciHostdevs was returning 0
(success) when no hostdevs were present, but would otherwise return -1
(failure) even when it completed successfully. It is only called from
qemuProcessReconnect(), and when qemuProcessReconnect got back an
error, it would not only stop reconnecting, but would terminate the
guest qemu process "to remove danger of it ending up running twice if
user tries to start it again later".
(This bug was introduced in commit 011cf7ad, which was pushed between
v1.0.2 and v1.0.3, so all maintenance branches from v1.0.3 up to 1.0.5
will need this one line patch applied.)
We can't use GNULIB's fprintf-posix due to licensing
incompatibilities. We do already have a portable
formatting via virAsprintf() which we got from GNULIB
though. We can use to create a virFilePrintf() function.
But really gnulib could just provide a 'fprintf'
module, that depended on just its 'asprintf' module.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
A literal IPv6 must be escaped, otherwise migration fails with:
unable to execute QEMU command 'drive-mirror': address resolution failed
for f0::0d:5901: Servname not supported for ai_socktype
since QEMU treats everything after the first ':' as the port.
https://bugzilla.redhat.com/show_bug.cgi?id=903480
During domain destruction it's possible that the learnIPAddressThread has
already removed the interface prior to the teardown filter path being run.
The teardown code would only be telling the thread to terminate.
Commit '6afdfc8e' adjusted the exit and error paths to go through the error
and cleanup labels, but neglected to remove the return ret prior to cleanup.
Also noted the 'type' xml string fetch was never checked for NULL which
could lead to some interesting results.
If snapshot creation failed for example due to invalid use of the
"REUSE_EXTERNAL" flag, libvirt killed access to the original image file
instead of the new image file. On machines with selinux this kills the
whole VM as the selinux context is enforced immediately.
* qemu_driver.c:qemuDomainSnapshotUndoSingleDiskActive():
- Kill access to the new image file instead of the old one.
Partially resolves: https://bugzilla.redhat.com/show_bug.cgi?id=906639
Commit d671121d was incomplete; I hit another compile fail on
cygwin not finding the correct rpc/rpc.h.
* src/Makefile.am (virtlockd_CFLAGS): Add XDR_CFLAGS.
Signed-off-by: Eric Blake <eblake@redhat.com>
A bug in Cygwin [1] and poor error messages from gcc [2] lead
to this confusing compilation error:
qemu/qemu_monitor.c:418:9: error: passing argument 2 of 'sendmsg' from incmpatible pointer type
/usr/include/sys/socket.h:42:11: note: expected 'const struct msghdr *' but argument is of type 'struct msghdr *'
[1] http://cygwin.com/ml/cygwin/2013-05/msg00451.html
[2] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57475
* src/qemu/qemu_monitor.c (includes): Include <sys/socket.h>
before <sys/un.h>.
Signed-off-by: Eric Blake <eblake@redhat.com>
This is a recurring problem for cygwin :)
For example, see commit 23a4df88.
qemu/qemu_driver.c: In function 'qemuStateInitialize':
qemu/qemu_driver.c:691:13: error: format '%d' expects type 'int', but argument 8 has type 'uid_t' [-Wformat]
* src/qemu/qemu_driver.c (qemuStateInitialize): Add casts.
* daemon/remote.c (remoteDispatchAuthList): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
A cygwin build of the qemu driver fails with:
qemu/qemu_process.c: In function 'qemuPrepareCpumap':
qemu/qemu_process.c:1803:31: error: 'CPU_SETSIZE' undeclared (first use in this function)
CPU_SETSIZE is a Linux extension in <sched.h>; a bit more portable
is using sysconf if _SC_NPROCESSORS_CONF is defined (several platforms
have it, including Cygwin). Ultimately, I would have preferred to
use gnulib's 'nproc' module, but it is currently under an incompatible
license.
* src/qemu/qemu_conf.h (QEMUD_CPUMASK_LEN): Provide definition on
cygwin.
Signed-off-by: Eric Blake <eblake@redhat.com>
On cygwin, the build failed with:
In file included from ./rpc/virnetmessage.h:24:0,
from ./rpc/virnetclient.h:29,
from locking/lock_driver_lockd.c:31:
./rpc/virnetprotocol.h:9:21: fatal error: rpc/rpc.h: No such file or directory
* src/Makefile.am (lockd_la_CFLAGS): Add XDR_CFLAGS.
Signed-off-by: Eric Blake <eblake@redhat.com>
Compilation on cygwin failed due to a bug in the sasl headers
present on that platform (libsasl2-devel 2.1.26):
In file included from rpc/virnetserverclient.c:27:0:
/usr/include/sasl/sasl.h:230:38: error: expected declaration specifiers or '...' before 'size_t'
Upstream is aware of their bug:
https://bugzilla.cyrusimap.org/show_bug.cgi?id=3759
* src/rpc/virnetserverclient.c (includes): Ensure size_t is
defined before using sasl.h.
Signed-off-by: Eric Blake <eblake@redhat.com>
Bummer, I committed, then fixed a typo, then tested, and forgot to
amend the commit before pushing 7d21d6b6.
* src/rpc/virnettlscontext.c (includes): Use correct spelling.
Building when configured --with-libvirtd=no fails with:
In file included from ../src/qemu/qemu_command.h:30:0,
from testutilsqemu.h:4,
from networkxml2xmltest.c:14:
../src/qemu/qemu_conf.h:175:5: error: expected specifier-qualifier-list before 'virStateInhibitCallback'
* src/libvirt_internal.h (virStateInhibitCallback): Move outside
of conditional.
Signed-off-by: Eric Blake <eblake@redhat.com>
Building with gnutls 3.2.0 (such as shipped with current cygwin) fails
with:
rpc/virnettlscontext.c: In function 'virNetTLSSessionGetKeySize':
rpc/virnettlscontext.c:1358:5: error: implicit declaration of function 'gnutls_cipher_get_key_size' [-Wimplicit-function-declaration]
Yeah, it's stupid that gnutls broke API by moving their declaration
into a new header without including that header from the old one,
but it's easy enough to work around, all without breaking on gnutls
1.4.1 (hello RHEL 5) that lacked the new header.
* configure.ac (gnutls): Check for <gnutls/crypto.h>.
* src/rpc/virnettlscontext.c (includes): Include additional header.
Signed-off-by: Eric Blake <eblake@redhat.com>
And error out if the casted value is not same with the original
one, which prevents the bug on platform(s) where uid_t/gid_t
has different size with long.
Changes:
* Free all the strings at "cleanup", instead of freeing them
in the middle
* Remove xmlFree
* s/tmppath/target_path/, to make it more sensible
* Add new goto label "error"
Currently, if there's an error opening /dev/vhost-net (e.g. because
it doesn't exist) but it's not required we proceed with vhostfd array
filled with -1 and vhostfdSize unchanged. Later, when constructing
the qemu command line only non-negative items within vhostfd array
are taken into account. This means, vhostfdSize may be greater than
the actual count of non-negative items in vhostfd array. This results
in improper command line arguments being generated, e.g.:
-netdev tap,fd=21,id=hostnet0,vhost=on,vhostfd=(null)
gcc 4.1.2 (hello, RHEL 5!) fails to build on 32-bit platforms with:
conf/domain_conf.c: In function 'virDomainDefParseXML':
conf/domain_conf.c:10581: warning: integer constant is too large for 'long' type
Problem introduced in commit f8e3221f9.
* src/conf/domain_conf.c (virDomainDefParseXML): Mark large constants.
Signed-off-by: Eric Blake <eblake@redhat.com>
If we are just ejecting media, ret == -1 even after the retry loop
determines that the tray is open, as requested. This means media
disconnect always report's error.
Fix it, and fix some other mini issues:
- Don't overwrite the 'eject' error message if the retry loop fails
- Move the retries decrement inside the loop, otherwise the final loop
might succeed, yet retries == 0 and we will raise error
- Setting ret = -1 in the disk->src check is unneeded
- Fix comment typos
cc: mprivozn@redhat.com
I noticed several unusual spacings in for loops, and decided to
fix them up. See the next commit for the syntax check that found
all of these.
* examples/domsuspend/suspend.c (main): Fix spacing.
* python/libvirt-override.c: Likewise.
* src/conf/interface_conf.c: Likewise.
* src/security/virt-aa-helper.c: Likewise.
* src/util/virconf.c: Likewise.
* src/util/virhook.c: Likewise.
* src/util/virlog.c: Likewise.
* src/util/virsocketaddr.c: Likewise.
* src/util/virsysinfo.c: Likewise.
* src/util/viruuid.c: Likewise.
* src/vbox/vbox_tmpl.c: Likewise.
* src/xen/xen_hypervisor.c: Likewise.
* tools/virsh-domain-monitor.c (vshDomainStateToString): Drop
default case, to let compiler check us.
* tools/virsh-domain.c (vshDomainVcpuStateToString): Likewise.
Signed-off-by: Eric Blake <eblake@redhat.com>
When src is NULL, VIR_STRDUP will return 0 directly.
This patch will set dest to NULL before VIR_STRDUP return.
Example:
[root@yds-pc libvirt]# virsh
Welcome to virsh, the virtualization interactive terminal.
Type: 'help' for help with commands
'quit' to quit
virsh # connect
error: Failed to connect to the hypervisor
error: internal error Unable to parse URI �N�*
Signed-off-by: yangdongsheng <yangds.fnst@cn.fujitsu.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
Currently qemuDomainReboot() does reboot in two phases:
qemuMonitorSystemPowerdown() and qemuProcessFakeReboot().
qemuMonitorSystemPowerdown() shutdowns the domain and saves domain
state/reason as VIR_DOMAIN_SHUTDOWN_UNKNOWN.
qemuProcessFakeReboot() sets domain state/reason to
VIR_DOMAIN_RESUMED_UNPAUSED but does not save domain state changes.
Subsequent restart of libvirtd leads to restoring domain state/reason to
saved that is VIR_DOMAIN_SHUTDOWN_UNKNOWN and to automatic shutdown of
the domain. This commit adds virDomainSaveStatus() into
qemuProcessFakeReboot() to avoid unexpected shutdowns.
VI objects support inheritance with subtype polymorphism. For example the
FileInfo object type is extended by FloppyImageFileInfo, FolderFileInfo
etc. Then SearchDatastore_Task returns an array of FileInfo objects and
depending on the represented file the FileInfo is actually a FolderFileInfo
or FloppyImageFileInfo etc. The actual type information is stored as XML
attribute that allows clients such as libvirt to distinguish between the
actual types. esxVI_GetActualObjectType is used to extract the actual type.
I assumed that this mechanism would be used for all VI object types that
have subtypes. But this is not the case. It seems only to be used for types
that are actually used as generic base type such as FileInfo. But it is not
used for types that got extended later such as ElementDescription that was
extended by ExtendedElementDescription (added in vSphere API 4.0) or that
are not meant to be used with subtype polymorphism.
This breaks the deserialization of types that contain ElementDescription
properties such as PerfCounterInfo or ChoiceOption, because the code
expects an ElementDescription object to have an XML attribute named type
that is not present, since ExtendedElementDescription was added to the
esx_vi_generator.input in commit 60f0f55ee4.
This in turn break virtual machine question handling and auto answering.
Fix this by using the base type if no XML type attribute is present.
With previous patch, we accept negative value as length of string to
duplicate. So there is no need to pass strlen(src) in case we want to do
duplicate the whole string.
It may shorten the code a bit as the following pattern:
VIR_STRNDUP(dst, src, cond ? n : strlen(src))
is used on several places among our code. However, we can
move the strlen into virStrndup and thus write just:
VIR_STRNDUP(dst, src, cond ? n : -1)
Remove error reporting when calling the virNWFilterDHCPSnoopEnd
function with an interface for which no thread is snooping traffic.
Document the usage of this function.
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
Function qemuDomainSetBlockIoTune() was checking QEMU capabilities
even when !(flags & VIR_DOMAIN_AFFECT_LIVE) and the domain was
shutoff, resulting in the following problem:
virsh # domstate asdf; blkdeviotune asdf vda --write-bytes-sec 100
shut off
error: Unable to change block I/O throttle
error: unsupported configuration: block I/O throttling not supported with this QEMU binary
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=965016
Currently, the controllers argument to virCgroupDetect acts both as
a result filter and a required controller specification, which is
a bit overloaded. If both functionalities are needed, it would be
better to have them seperated into a filter and a requirement mask.
The only situation where it is used today is to ensure that only
CPU related controllers are used for the VCPU directories. But here
we clearly do not want to enforce the existence of cpu, cpuacct and
specifically not cpuset at the same time.
This commit changes the semantics of controllers to "filter only".
Should a required mask ever be needed, more work will have to be done.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
Within whole vircgroup.c we 'return -errno', e.g. 'return -ENOMEM'.
However, in this specific function virCgroupAddTaskStrController
we weren't returning -ENOMEM but -1 despite fact that later in
the function we are returning one of errno values indeed.
Commit '18b14012' refactored the Xen code resulting in a Coverity
warning about possible NULL reference if the path where the XM driver
takes puts the def on it's list. Moved/duplicated the virGetDomain()
call to pacify the possible NULL deref.
Since f03dcc5 we use [::] as the listening address both on qemu
command line in -incoming and in nbd-server-start QMP command.
However the latter requires just :: without the braces.
Don't free the stream on error if we've successfully added it
to the hash table, since it will be freed by virChrdevHashEntryFree
callback.
Preserve the error message before calling virStreamFree, since it
resets the error.
Introduced by 4716138, crashing since 6921892.
Reported by Sergey Fionov on libvir-list.
In bf1fe848 I've introduced 'newName' variable to substitute the old
'const char *name' as previously we had an ugly code there:
name = strdup(name);
However, some parts of the function were not updated, so they were still
calling VIR_FREE(name) instead of VIR_FREE(newName).
There is possibility to jump to 'cleanup' label without tapfd variable
being initialized. In the label, VIR_FORCE_CLOSE(tapfd) is called which
can have fatal consequences.
The same issue as (already fixed) in virDomainCreate -
REMOTE_PROC_DOMAIN_CREATE_WITH_FLAGS doesn't return new domain ID, only
-1 on error or 0 on success.
Besides this one fix it is more general problem - local domain object
ID can desynchronize with the real one, for example in case of another
client creates/destroys domain in the meantime. Perhaps virDomainGetID
should be called remotely (with all performance implications...)? Or
some event-based notification used?
Signed-off-by: Marek Marczykowski <marmarek@invisiblethingslab.com>
In my previous patches I enabled the IFF_MULTI_QUEUE flag every
time the user requested multiqueue TAP device. However, this
works only at runtime. During build time the flag may be
undeclared.
In order to learn libvirt multiqueue several things must be done:
1) The '/dev/net/tun' device needs to be opened multiple times with
IFF_MULTI_QUEUE flag passed to ioctl(fd, TUNSETIFF, &ifr);
2) Similarly, '/dev/vhost-net' must be opened as many times as in 1)
in order to keep 1:1 ratio recommended by qemu and kernel folks.
3) The command line construction code needs to switch from 'fd=X' to
'fds=X:Y:...:Z' and from 'vhostfd=X' to 'vhostfds=X:Y:...:Z'.
4) The monitor handling code needs to learn to pass multiple FDs.
This attribute is going to represent number of queues for
multique vhost network interface. This commit implements XML
extension part of the feature and add one test as well. For now,
we can only do xml2xml test as qemu command line generation code
is not adapted yet.
-vnc :5900,share=allow-exclusive
allows clients to ask for exclusive access which is
implemented by dropping other connections Connecting
multiple clients in parallel requires all clients asking
for a shared session (vncviewer: -shared switch)
-vnc :5900,share=force-shared
disables exclusive client access. Useful for shared
desktop sessions, where you don't want someone forgetting
specify -shared disconnect everybody else.
-vnc :5900,share=ignore
completely ignores the shared flag and allows everybody
connect unconditionally
In my review of 31532ca I missed the fact that VIR_STRDUP
now returns 1 on success, and 0 if the source was NULL.
(This still doesn't add proper OOM error handling.)
Only a few cases are allowed:
1) The expression is empty for "for" loop, E.g.
for (i = 0; ; i++)
2) An empty statement
while (write(statuswrite, &status, 1) == -1 &&
errno == EINTR)
; /* empty */
3) ";" is inside double-quote, I.e, as part of const string. E.g.
vshPrint(ctl, "a ; b ; cd;\n");
The "for" loop in src/rpc/virnettlscontext.c is the special case,
1) applies for it, so change it together in this patch.
virConnectListAllInterfaces should support to list all of
interfaces when the value of flags is 0. The behaviour is
consistent with other virConnectListAll* APIs
https://bugzilla.redhat.com/show_bug.cgi?id=965169 documents a
problem starting domains when cgroups are enabled; I was able
to reliably reproduce the race about 5% of the time when I added
hooks to domain startup by 3 seconds (as that seemed to be about
the length of time that qemu created and then closed a temporary
thread, probably related to aio handling of initially opening
a disk image). The problem has existed since we introduced
virCgroupMoveTask in commit 9102829 (v0.10.0).
There are some inherent TOCTTOU races when moving tasks between
kernel cgroups, precisely because threads can be created or
completed in the window between when we read a thread id from the
source and when we write to the destination. As the goal of
virCgroupMoveTask is merely to move ALL tasks into the new
cgroup, it is sufficient to iterate until no more threads are
being created in the old group, and ignoring any threads that
die before we can move them.
It would be nicer to start the threads in the right cgroup to
begin with, but by default, all child threads are created in
the same cgroup as their parent, and we don't want vcpu child
threads in the emulator cgroup, so I don't see any good way
of avoiding the move. It would also be nice if the kernel were
to implement something like rename() as a way to atomically move
a group of threads from one cgroup to another, instead of forcing
a window where we have to read and parse the source, then format
and write back into the destination.
* src/util/vircgroup.c (virCgroupAddTaskStrController): Ignore
ESRCH, because a thread ended between read and write attempts.
(virCgroupMoveTask): Loop until all threads have moved.
Signed-off-by: Eric Blake <eblake@redhat.com>
Introduce use of a virDomainDefPtr in the domain coredump
APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain stats &
peek APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain scheduler
APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain autostart
APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain hotplug
APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain VCPU
APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain create, migrate,
getxml, & define APIs to simplify introduction of ACL security
checks. The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain save
APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain property
APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain lifecycle
APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Introduce use of a virDomainDefPtr in the domain lookup
APIs to simplify introduction of ACL security checks.
The virDomainPtr cannot be safely used, since the app
may have supplied mis-matching name/uuid/id fields. eg
the name points to domain X, while the uuid points to
domain Y. Resolving the virDomainPtr to a virDomainDefPtr
ensures a consistent name/uuid/id set.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
In 84c59ffa I've tried to fix changing ejectable media process. The
process should go like this:
1) we need to call 'eject' on the monitor
2) we should wait for 'DEVICE_TRAY_MOVED' event
3) now we can issue 'change' command
However, while waiting in step 2) the domain monitor was locked. So
even if qemu reported the desired event, the proper callback was not
called immediately. The monitor handling code needs to lock the
monitor in order to read the event. So that's the first lock we must
not hold while waiting. The second one is the domain lock. When
monitor handling code reads an event, the appropriate callback is
called then. The first thing that each callback does is locking the
corresponding domain as a domain or its device is about to change
state. So we need to unlock both monitor and VM lock. Well, holding
any lock while sleep()-ing is not the best thing to do anyway.
Now that COPYING no longer contains the text of the LGPL,
modify the LGPLv2-only files from vbox to call out the
correct file.
* src/vbox/vbox_CAPI_v2_2.h: Refer to correct file.
* src/vbox/vbox_CAPI_v3_0.h: Likewise.
* src/vbox/vbox_CAPI_v3_1.h: Likewise.
* src/vbox/vbox_CAPI_v3_2.h: Likewise.
* src/vbox/vbox_CAPI_v4_0.h: Likewise.
* src/vbox/vbox_CAPI_v4_1.h: Likewise.
* src/vbox/vbox_V2_2.c: Likewise.
* src/vbox/vbox_V3_0.c: Likewise.
* src/vbox/vbox_V3_1.c: Likewise.
* src/vbox/vbox_XPCOMCGlue.c: Likewise.
* src/vbox/vbox_XPCOMCGlue.h: Likewise.
* src/vbox/vbox_driver.c: Likewise.
* src/vbox/vbox_driver.h: Likewise.
* src/vbox/vbox_tmpl.c: Likewise.
* src/vbox/vbox_V3_2.c: Copy license notice from vbox_V3_1.c.
* src/vbox/vbox_V4_0.c: Likewise.
* src/vbox/vbox_V4_1.c: Likewise.
* src/vbox/README: Mention copyright issues; this particular
file contains no code and therefore does not need LGPL.
Signed-off-by: Eric Blake <eblake@redhat.com>
After commit c131525bec
"Auto-add a root <filesystem> element to LXC containers on startup"
for libvirt lxc, root must be existent.
Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
Currently, the openvzDomainSetNetwork function constructs an
array of strings representing a command line for VZCTL binary.
This is a overkill since our virCommand APIs can cover all the
functionality. Moreover, the function is not following our
structure where return value is set to -1 initially, and after
all operations succeeded then it is set to zero.
Since 0d70656afd, it starts to access the sysfs files to build
the qemu command line (by virSCSIDeviceGetSgName, which is to find
out the scsi generic device name by adpater🚌target:unit), there
is no way to work around, qemu wants to see the scsi generic device
like "/dev/sg6" anyway.
And there might be other places which need to access sysfs files
when building qemu command line in future.
Instead of increasing the arguments of qemuBuildCommandLine, this
introduces a new callback for qemuBuildCommandLine, and thus tests
can register their own callbacks for sysfs test input files accessing.
* src/qemu/qemu_command.h: (New callback struct
qemuBuildCommandLineCallbacks;
extern buildCommandLineCallbacks)
* src/qemu/qemu_command.c: (wire up the callback struct)
* src/qemu/qemu_driver.c: (Use the new syntax of qemuBuildCommandLine)
* src/qemu/qemu_hotplug.c: Likewise
* src/qemu/qemu_process.c: Likewise
* tests/testutilsqemu.[ch]: (Helper testSCSIDeviceGetSgName;
callback struct testCallbacks;)
* tests/qemuxml2argvtest.c: (Use testCallbacks)
* src/tests/qemuxmlnstest.c: (Like above)
Changes:
* Remove useless comments
* Remove useless blank lines
* If the struct member is a enum type, comment it like
/* enum fooBar */
* Break the long lines
* Prefer the common function style for the inline function
Changes:
* Remove the useless space in "for" statement (e.g.
for (i = 0 ; i < something ; i++)
* Change the function's style to:
void
foo(bar)
{
printf("foo is not bar\n");
}
* Don't lose "{}" for "if...else" branches if one of the branch
has more than one line block. Example of the old ones:
if (a) {
printf("a is not funny");
} else
printf("a is funny");
* Remove the 1 space before "goto" label.
* Remove the useless blank line(s)
* Add blank line if it can make the code more clear to eyes.
Resolves:https://bugzilla.redhat.com/show_bug.cgi?id=927620
#kill -STOP `pidof qemu-kvm`
#virsh destroy $guest --graceful
error: Failed to destroy domain testVM
error: An error occurred, but the cause is unknown
With --graceful, SIGTERM always is emitted to kill driver
process, but it won't success till burning out waiting time
in case of process being stopped.
But domain destroy without --graceful can work, SIGKILL will
be emitted to the stopped process after 10 secs which always
kills a process even one that is currently stopped.
So report an error after burning out waiting time in this case.
