Some DHCP servers send their DHCP replies to the broadcast MAC address
rather than to the MAC address of the VM. The existing DHCP snooping
code assumes that the reply always goes to the MAC address of the VM
thus filtering the traffic of some DHCP servers' replies.
The below patch adapts the code to
1) filter DHCP replies by comparing the MAC address in the reply against
the MAC address of the VM (held in the snoop request)
2) adapts the pcap filter for traffic towards the VM to accept DHCP replies
sent to any MAC address; for further filtering we rely on 1)
3) creates initial rules that are active while waiting for DHCP replies;
these rules now accept DHCP replies to the VM's MAC address or to the
MAC broadcast address
The introduction of the new VLAN code, along with the fix
from 5e465df6be, caused the
addition of OVS ports to fail with the following message:
ovs-vsctl: 00002|vsctl|ERR|: missing column name
This fix takes into account the VLAN arguments are optional,
and correctly sets up the command line to run the "ovs-vsctl"
command to add ports to the OVS bridge.
Signed-off-by: Kyle Mestery <kmestery@cisco.com>
CC: Eric Blake <eblake@redhat.com>
If a 8021.Qbh network device supports SRIOV and its VF is being used
in pci passthrough mode, when the guest is shutdown or destroyed, the
PF inteface is also brought down. qemuDomainHostdevNetConfigRestore()
finds out the PF for provided hostdev (which is VF) and passes it to
virNetDevPortProfileDisassociate() as linkdev. Later, linkdev gets passed
to virNetDevSetOnline() where the interface is brought down by clearing
IFF_UP flag.
Bringing down a PF, when only VF is being brought down is not expected
behavior. This patch adds a check so that virNetDevSetOnline() is called
only for PF and not if device is a VF.
Signed-off-by: Nishank Trivedi <nistrive@cisco.com>
The loop processing the trusted DHCP server generated one too
many rules and added one final rules that accepted responses
from all DHCP servers. Below patch fixes this.
virDomainVcpuPinAdd does a realloc on vcpupin_list if the new vcpu pin
definition doesn't fit into the array. The list is an array of pointers
but the function definition didn't support returning the changed pointer
to the caller if it was realloced. This caused segfaults if realloc
would change the base pointer.
virDomainVcpuPinDefCopy when the control flow reaches out of memory
cleanup code, the flow would end in a infinite loop as the loop variable
wasn't decremented.
Also a dereference of NULL pointers was possible if allocation of the
Vcpu pinning definiton structure failed.
Commit d0c0e79ac6 left behind some dead
code (hasDAC can't be efectively set to true, because
virSecurityManagerNew fails to load the "dac" driver).
This patch also enhances the condition for adding the default
auto-detected security manager if the manager array is allocated but
empty.
Also the configuration file for qemu driver still contains reference to
the DAC driver that can't be enabled manualy.
Before commit 05447e3af4, qemuAgentCommand
blocked until it got a reply or appropriate event. When new parameter
was added to qemuAgentCommand in the above commit, all existing callers
of it were updated in a wrong way changing them from blocking to
5-seconds timeout.
This bug was revealed by the crash described in
https://bugzilla.redhat.com/show_bug.cgi?id=852383
The vlan info pointer sent to virNetDevOpenvswitchAddPort should never
be non-NULL unless there is at least one tag. The factthat such a vlan
info pointer was receveid pointed out that a caller was passing the
wrong pointer. Instead of sending &net->vlan, the result of
virDomainNetGetActualVlan(net) should be sent - that function will
look for vlan info in net->data.network.actual->vlan, and in cany case
return NULL instead of a pointer if the vlan info it finds has no
tags.
Aside from causing the crash, sending a hardcoded &net->vlan has the
effect of ignoring vlan info from a <network> or <portgroup> config.
Fixup buffer usage when handling VLANs. Also fix the logic
used to determine if the virNetDevVlanPtr is valid or not.
Fixes crashes in the latest code when using Open vSwitch
virtualports.
Signed-off-by: Kyle Mestery <kmestery@cisco.com>
If no 'security_driver' config option was set, then the code
just loaded the 'dac' security driver. This is a regression
on previous behaviour, where we would probe for a possible
security driver. ie default to SELinux if available.
This changes things so that it 'security_driver' is not set,
we once again do probing. For simplicity we also always
create the stack driver, even if there is only one driver
active.
The desired semantics are:
- security_driver not set
-> probe for selinux/apparmour/nop
-> auto-add DAC driver
- security_driver set to a string
-> add that one driver
-> auto-add DAC driver
- security_driver set to a list
-> add all drivers in list
-> auto-add DAC driver
It is not allowed, or possible to specify 'dac' in the
security_driver config param, since that is always
enabled.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The security driver loading code in qemu has a flaw that causes it to
register the DAC security driver twice. This causes problems (machines
unable to start) as the two DAC drivers clash together.
This patch refactors the code to allow loading the DAC driver even if
its specified in configuration (it can't be registered as a common
security driver), and does not add the driver twice.
This reverts commit 9f9b7b85c9.
The DAC security driver needs special handling and extra parameters and
can't just be added to regular security drivers.
If cgroups are enabled in general but cpu cgroup is disabled in
qemu.conf or not mounted at all, libvirt would refuse to start any
domain even though scheduler parameters are not set in domain XML.
This patch makes cpu cgroup mandatory only for domains that actually
want to use it.
* src/util/virnetdevopenvswitch.c (virNetDevOpenvswitchAddPort): avoid libvirtd
crash due to derefing a NULL virtVlan->tag.
RHBZ: https://bugzilla.redhat.com/show_bug.cgi?id=852383
Signed-off-by: Alex Jia <ajia@redhat.com>
When starting a machine the DAC security driver tries to set the UID and
GID of the newly spawned process. This worked as desired if the desired
label was set. When the label was missing a logical bug in
virSecurityDACGenLabel() caused that uninitialised values were used as
uid and gid for the new process.
With this patch, default values (from qemu driver configuration)
are used if the label is not found.
getpwuid_r returns success but sets the return structure to NULL when it
fails to deliver data about the requested uid. In our helper code this
created following strange error messages:
" ... cannot getpwuid_r(1234): Success"
This patch creates a more helpful message:
" ... getpwuid_r failed to retrieve data for uid '1234'"
Previous commit 0b4b53bb80 defined 'inline' to prevent broken build on
systems with libnl1 headers. However, it broke build on systems with
libnl3 headers. Therefore we must make that fix conditional.
Ubuntu 10.04 shipped with out-of-the-box libnl1 headers, which
assumed the old gcc semantics of 'extern inline' as a C89 extension:
the function will _always_ be inline if it is used, and that
it may be declared extern inline in headers without a definition,
as long as the definition occurs before any use. But when C99
added 'extern inline' as a mandatory feature of the language, with
slightly different semantics than gcc (the function MUST have
external linkage, and the inline definition MUST be present
alongside any declaration, where the compiler can then choose
which of the two versions to use), this rendered the use of
'inline' in libnl's header obsolete. Most distros already solved
this by removing 'inline' (the resulting 'extern' is correct,
regardless of gcc semantics), and libnl-3 does not have the
problem (where it has switched to 'static inline' instead, again
with the definition present, and again, our hack will result in
plain 'static' with no ill effects). But for the case of building
out of the box, we hack around the broken Ubuntu header.
* src/util/virnetlink.h: Work around libnl issue.
With current flow in qemudDomainDefine we might lose data
when updating an existing domain. We parse given XML and
overwrite the configuration. Then we try to save the new
config. However, this step may fail and we don't perform any
roll back. In fact, we remove the domain from the list of
domains held up by qemu driver. This is okay as long as the
domain was brand new one.
Currently, when guest agent is configured but not responsive
(e.g. due to appropriate service not running in the guest)
we return VIR_ERR_INTERNAL_ERROR. Both are wrong. Therefore
we need to introduce new error code to reflect this case.
When checking for seclabels without security models, def->nseclabels is
already set to n. In the case of an error def->seclabels is freed but
nseclabels is left untouched. This leads to a segmentation fault when
def is freed in virDomainDefParseXML.
With the latest patches libvirt supports qemu agent monitor
passthrough. However, function in qemu driver is called
qemuDrvDomainAgentCommand. s/Drv// as used in all other names.
In my quest for reusing variables I failed to edit one variable when
fixing details between two patch versions. That results in a failure
to start qemu with autoport and spice tls, because qemu is trying to
bind two sockets to the same port.
Commit 4b03d59167 changed the pinning
behavior in a way that makes some machines non-startable.
The comment mentioning that we cannot control each vcpu when there is
not VCPU<-> PID mapping available is true, however, this isn't
necessarily an error, because this can be caused by old QEMU without
support for "query-cpus" command as well as a software emulated
machines that don't create more than one process.
When libvirt_lxc is built, it uses the utility library and #includes
virnetdev.h, which #includes virnetlink.h, which includes
<netlink/msg.h>.
Normally, the netlink include directory would be just off
/usr/include, so that wouldn't create a problem, but on Fedora and
RHEL systems using libnl3, the libnl includes have been moved into
/usr/include/libnl3 (to allow concurrent installation of libnl-1.1).
All other binaries that need it have added $(LIBNL_CFLAGS) to their
CFLAGS, but not libvirt_lxc, so it fails to build on Fedora and RHEL
that have only libnl3-devel installed. This was previously unnoticed
because everyone was building with libnl headers in
/usr/include/netlink (even on systems with the headers in
/usr/include/libnl3/netlink, many people (like me) usually also have
the libnl1.1 headers in /usr/include/netlink).
This patch adds the necessary CFLAGS for libvirt_lxc.
Note that we don't need to add $(LIBNL_LIBS) to the LDADD for this
binary, because it never directly calls libnl functions, but only
calls them indirectly through the util library, which it's already
linking against.
The name 'virDomainDiskSnapshot' didn't fit in with our normal
conventions of using a prefix hinting that it is related to a
virDomainSnapshotPtr. Also, a future patch will reuse the
enum for declaring where the VM memory is stored.
* src/conf/snapshot_conf.h (virDomainDiskSnapshot): Rename...
(virDomainSnapshotLocation): ...to this.
(_virDomainSnapshotDiskDef): Update clients.
* src/conf/domain_conf.h (_virDomainDiskDef): Likewise.
* src/libvirt_private.syms (domain_conf.h): Likewise.
* src/conf/domain_conf.c (virDomainDiskDefParseXML)
(virDomainDiskDefFormat): Likewise.
* src/conf/snapshot_conf.c: (virDomainSnapshotDiskDefParseXML)
(virDomainSnapshotAlignDisks, virDomainSnapshotDefFormat):
Likewise.
* src/qemu/qemu_driver.c (qemuDomainSnapshotDiskPrepare)
(qemuDomainSnapshotCreateSingleDiskActive)
(qemuDomainSnapshotCreateDiskActive, qemuDomainSnapshotCreateXML):
Likewise.
This has several benefits:
1. Future snapshot-related code has a definite place to go (and I
_will_ be adding some)
2. Snapshot errors now use the VIR_FROM_DOMAIN_SNAPSHOT error
classification, which has been underutilized (previously only in
libvirt.c)
* src/conf/domain_conf.h, domain_conf.c: Split...
* src/conf/snapshot_conf.h, snapshot_conf.c: ...into new files.
* src/Makefile.am (DOMAIN_CONF_SOURCES): Build new files.
* po/POTFILES.in: Mark new file for translation.
* src/vbox/vbox_tmpl.c: Update caller.
* src/esx/esx_driver.c: Likewise.
* src/qemu/qemu_command.c: Likewise.
* src/qemu/qemu_domain.h: Likewise.
We were failing to react to allocation failure when initializing
a snapshot object list. Changing things to store a pointer
instead of a complete object adds one more possible point of
allocation failure, but at the same time, will make it easier to
react to failure now, as well as making it easier for a future
patch to split all virDomainSnapshotPtr handling into a separate
file, as I continue to add even more snapshot code.
Luckily, there was only one client outside of domain_conf.c that
was actually peeking inside the object, and a new wrapper function
was easy.
* src/conf/domain_conf.h (_virDomainObj): Use a pointer.
(virDomainSnapshotObjListInit): Rename.
(virDomainSnapshotObjListFree, virDomainSnapshotForEach): New
declarations.
(_virDomainSnapshotObjList): Move definitions...
* src/conf/domain_conf.c: ...here.
(virDomainSnapshotObjListInit, virDomainSnapshotObjListDeinit):
Rename...
(virDomainSnapshotObjListNew, virDomainSnapshotObjListFree): ...to
these.
(virDomainSnapshotForEach): New function.
(virDomainObjDispose, virDomainListPopulate): Adjust callers.
* src/qemu/qemu_domain.c (qemuDomainSnapshotDiscard)
(qemuDomainSnapshotDiscardAllMetadata): Likewise.
* src/qemu/qemu_migration.c (qemuMigrationIsAllowed): Likewise.
* src/qemu/qemu_driver.c (qemuDomainSnapshotLoad)
(qemuDomainUndefineFlags, qemuDomainSnapshotCreateXML)
(qemuDomainSnapshotListNames, qemuDomainSnapshotNum)
(qemuDomainListAllSnapshots)
(qemuDomainSnapshotListChildrenNames)
(qemuDomainSnapshotNumChildren)
(qemuDomainSnapshotListAllChildren)
(qemuDomainSnapshotLookupByName, qemuDomainSnapshotGetParent)
(qemuDomainSnapshotGetXMLDesc, qemuDomainSnapshotIsCurrent)
(qemuDomainSnapshotHasMetadata, qemuDomainRevertToSnapshot)
(qemuDomainSnapshotDelete): Likewise.
* src/libvirt_private.syms (domain_conf.h): Export new function.
When the XenStore tdb lives persistently and is not cleared between host
reboots, Xend (version 3.4 and 4.1) re-creates the domain information
located in XenStore below /vm/$UUID. (According to the xen-3.2-commit
hg265950e3df69 to fix a problem when locally migrating a domain to the
host itself.)
When doing so a version number is added to the UUID separated by one
dash, which confuses xenStoreDomainIntroduced(): It iterates over all
domains and tries to lookup all inactive domains using
xenStoreDomainGetUUID(), which fails if the running domain is renamed:
virUUIDParse() fails to parse the versioned UUID and the domain is
flagged as missing. When this happens the function delays .2s and
re-tries 20 times again, multiplied by the number of renamed VMs.
14:48:38.878: 4285: debug : xenStoreDomainIntroduced:1354 : Some domains were missing, trying again
This adds a significant delay:
# time virsh list >/dev/null
real 0m6.529s
# xenstore-list /vm
00000000-0000-0000-0000-000000000000
00000000-0000-0000-0000-000000000000-1
00000000-0000-0000-0000-000000000000-2
00000000-0000-0000-0000-000000000000-3
00000000-0000-0000-0000-000000000000-4
00000000-0000-0000-0000-000000000000-5
7c06121e-90c3-93d4-0126-50481d485cca
00000000-0000-0000-0000-000000000000-6
00000000-0000-0000-0000-000000000000-7
144ad19d-dfb4-2f80-8045-09196bb8784f
00000000-0000-0000-0000-000000000000-8
144ad19d-dfb4-2f80-8045-09196bb8784f-1
00000000-0000-0000-0000-000000000000-9
00000000-0000-0000-0000-000000000000-10
00000000-0000-0000-0000-000000000000-11
00000000-0000-0000-0000-000000000000-12
00000000-0000-0000-0000-000000000000-13
00000000-0000-0000-0000-000000000000-14
144ad19d-dfb4-2f80-8045-09196bb8784f-2
00000000-0000-0000-0000-000000000000-15
144ad19d-dfb4-2f80-8045-09196bb8784f-3
00000000-0000-0000-0000-000000000000-16
The patch adds truncation of the UUID as read from the XenStore path
before passing it to virUUIDParse().
The same issue is reported at
<http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=666135>
Signed-off-by: Philipp Hahn <hahn@univention.de>
Currently, if users set 'security_driver="dac"' in qemu.conf libvirtd
fails to initialize as DAC driver is not found because it is missing
in our security drivers array.
The original patch to support firewalld in nwfilter wasn't personally
checking the exit status of firewall-cmd, but was instead sending NULL
in the *exitstatus arg, which meant that virCommandWait would log an
error just for the exit status being non-0 (and a "more scary than
useful" error at that).
We don't want to treat this as an error, though, just as a reason to
use standard (ip|eb)tables commands instead of firewall-cmd.
This patch modifies the virCommandRun in the nwfilter code to request
status back from the caller. This avoids virCommandWait logging an
error message, and allows the caller to do as it likes after examining
the status.
The VIR_DEBUG() logged when firewalld is enabled has also been
reworded and changed to a VIR_INFO, and a similar VIR_INFO has been
added in the case that firewalld is *not* found+enabled.
I noticed this while auditing all calls to virCommandRun that request
an exit status from virCommandRun. Two functions in the openvz driver
openvzDomainGetBarrierLimit
openvzDomainSetBarrierLimit
request an exit status from virCommandRun (thus assuring that
virCommandRun won't log any errors just due to a non-0 exit status),
but then fail to examine that exit status. This could result in the
functions believing that the call to "vzlist" was successful, even
though it may have encountered an error.
The recent virDomainQemuAgentCommand addition is part of 0.10.0;
also, grouping all libvirt-qemu.so callbacks together makes them
easier to identify.
* src/libvirt_qemu.syms: Fix release symbol.
* src/qemu/qemu_driver.c (qemuDriver): Likewise.
* src/remote/remote_driver.c (remote_driver): Likewise.
* src/driver.h (_virDriver): Group qemu-specific callbacks.
