Ján Tomko [Thu, 11 Sep 2014 15:11:28 +0000 (17:11 +0200)]
conf: add backend element to interfaces
For tuning the network, alternative devices
for creating tap and vhost devices can be specified via:
<backend tap='/dev/net/tun' vhost='/dev/net-vhost'/>
Ján Tomko [Wed, 10 Sep 2014 17:12:54 +0000 (19:12 +0200)]
conf: split out virtio net driver formatting
Instead of checking upfront if the <driver> element will be needed
in a big condition, just format all the attributes into a string
and output the <driver> element if the string is not empty.
Erik Skultety [Tue, 16 Sep 2014 08:06:50 +0000 (10:06 +0200)]
network: check negative values in bridge queues
We already are checking for negative value, reporting an error, but
using wrong function and the check only succeeds when a value that
cannot be converted to number successfully is encountered. This patch
provides just a minor change in call of the right version
of function virStrToLong.
Hongbin Lu [Tue, 16 Sep 2014 02:22:48 +0000 (22:22 -0400)]
openvz: fixed two memory leaks on migration code
The first one occurs in openvzDomainMigratePrepare3Params() where in
case no remote uri is given, the distant hostname is used. The name is
obtained via virGetHostname() which require callers to free the
returned value.
The second leak lies in openvzDomainMigratePerform3Params(). There's a
virCommand used later. However, at the beginning of the function
virCheckFlags() is called which returns. So the command created was
leaked.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Michal Privoznik [Mon, 15 Sep 2014 13:31:40 +0000 (15:31 +0200)]
virprocess: Extend list of platforms for setns wrapper
Currently, the setns() wrapper is supported only for x86_64 and i686
which leaves us failing to build on other platforms like arm, aarch64
and so on. This means, that the wrapper needs to be extended to those
platforms and make to fail on runtime not compile time.
The syscall numbers for other platforms was fetched using this
command:
Peter Krempa [Mon, 15 Sep 2014 14:16:25 +0000 (16:16 +0200)]
util: storage: Fix qcow(2) header parser according to docs
The backing store string location offset 0 determines that the file
isn't present. The string size shouldn't be then checked:
from qemu.git/docs/specs/qcow2.txt
== Header ==
The first cluster of a qcow2 image contains the file header:
Byte 0 - 3: magic
QCOW magic string ("QFI\xfb")
4 - 7: version
Version number (valid values are 2 and 3)
8 - 15: backing_file_offset
Offset into the image file at which the backing file name
is stored (NB: The string is not null terminated). 0 if the
image doesn't have a backing file.
16 - 19: backing_file_size
Length of the backing file name in bytes. Must not be
longer than 1023 bytes. Undefined if the image doesn't have
a backing file. ^^^^^^^^^
This patch intentionally leaves the backing file string size check in
place in case a malformatted file would be presented to libvirt. Also
according to the docs the string size is maximum 1023 bytes, thus this
patch adds a check to verify that.
I was also able to verify that the check was done the same way in the
legacy qcow fromat (in qemu's code).
Eric Blake [Mon, 15 Sep 2014 23:33:16 +0000 (17:33 -0600)]
cputune: allow interleaved xml
I noticed this with the recent iothread pinning code, but the
problem existed longer than that. The XML validation required
users to supply <cputune> children in a strict order, even though
there was no conceptual reason why they can't occur in any order.
docs/ changes best viewed with -w
* docs/schemas/domaincommon.rng (cputune): Add interleave.
* tests/qemuxml2argvdata/qemuxml2argv-cputune-iothreads.xml: Swap
up order, copying canonical form...
* tests/qemuxml2xmloutdata/qemuxml2xmlout-cputune-iothreads.xml:
...here.
* tests/qemuxml2xmltest.c (mymain): Mark the difference.
Laine Stump [Mon, 15 Sep 2014 17:30:08 +0000 (13:30 -0400)]
network: detect conflicting route even if it is the final entry
This is a folloup to commit 5f719596, which checks for a route
conflicting with the standard libvirt default network subnet
(192.168.122.0/24). It turns out that $() strips the trailing newline
from the output of "ip route show", so there would be no match if the
route we were looking for was the final line of output. This can be
solved by adding ${nl} to the end of the output (just as we were
already adding it at the beginning of the output).
Add an option 'iothreadpin' to the <cpuset> to allow for setting the
CPU affinity for each IOThread.
The iothreadspin will mimic the vcpupin with respect to being able to
assign each iothread to a specific CPU, although iothreads ids start
at 1 while vcpu ids start at 0. This matches the iothread naming scheme.
John Ferlan [Wed, 3 Sep 2014 13:07:38 +0000 (09:07 -0400)]
qemu: Allow pinning specific IOThreads to a CPU
Modify qemuProcessStart() in order to allowing setting affinity to
specific CPU's for IOThreads. The process followed is similar to
that for the vCPU's.
This involves adding a function to fetch the IOThread id's via
qemuMonitorGetIOThreads() and adding them to iothreadpids[] list.
Then making sure all the cgroup data has been properly set up and
finally assigning affinity.
John Ferlan [Wed, 3 Sep 2014 13:05:02 +0000 (09:05 -0400)]
qemu_cgroup: Introduce cgroup functions for IOThreads
In order to support cpuset setting, introduce qemuSetupCgroupIOThreadsPin
and qemuSetupCgroupForIOThreads to mimic the existing Vcpu API's.
These will support having an 'iotrhreadpin' element in the 'cpuset' in
order to pin named IOThreads to specific CPU's. The IOThread pin names
will follow the IOThread naming scheme starting at 1 (eg "iothread1")
up through an including the def->iothreads value.
Erik Skultety [Mon, 15 Sep 2014 08:42:15 +0000 (10:42 +0200)]
network: check for invalid forward delay time
When spanning tree protocol is allowed in bridge settings, forward delay
value is set as well (default is 0 if omitted). Until now, there was no
check for delay value validity. Delay makes sense only as a positive
numerical value.
Note: However, even if you provide positive numerical value, brctl
utility only uses values from range <2,30>, so the number provided can
be modified (kernel most likely) to fall within this range.
John Ferlan [Fri, 12 Sep 2014 12:40:07 +0000 (08:40 -0400)]
daemon: Resolve Coverity FORWARD_NULL
Coverity complains that the comparison:
if (nfds && nfds > ((int)!!sock_path + (int)!!sock_path_ro))
could mean 'sock_path' is NULL. Later in virNetSocketNewListenUNIX
there's a direct dereference of path in the error path:
if (path[0] != '@')
A bit of sleuthing proves that upon entry to daemonSetupNetworking
there is no way for 'sock_path' to be NULL since daemonUnixSocketPaths
will set up 'sock_file' (although it may not set up 'sock_file_ro')
in all 3 paths.
Adjusted code to add ATTRIBUTE_NONNULL(3) on incoming path parameter and
then fixup the comparison of nfds to be a comparison against 2 or 1
depending on whether sock_path_ro is NULL or not.
John Ferlan [Fri, 12 Sep 2014 12:22:58 +0000 (08:22 -0400)]
qemu: Resolve Coverity BAD_SIZEOF
Coverity complains about the calculation of the buf & len within
the PROBE macro. So to quiet things down, do the calculation prior
to usage in either write() or qemuMonitorIOWriteWithFD() calls and
then have the PROBE use the calculated values - which works.
John Ferlan [Fri, 12 Sep 2014 12:16:07 +0000 (08:16 -0400)]
Resolve Coverity CHECKED_RETURN
Coverity complained that checking the return of virDomainCreate()
was not consistent amongst the callers - so added the return check
to the objecteventtest.c and adjust the virt-login-shell to compare
< 0 rather than just non zero for the failure condition.
John Ferlan [Fri, 12 Sep 2014 12:04:28 +0000 (08:04 -0400)]
virsh: Resolve Coverity DEADCODE
Coverity complains that on the first pass through the for loop that
'params' cannot be true, thus the ternary setting to "&" cannot be
done. Since we can only ever get to this point once, drop the ternary
John Ferlan [Fri, 12 Sep 2014 11:52:39 +0000 (07:52 -0400)]
domain_conf: Resolve Coverity COPY_PASTE_ERROR
Seems when commit id 'ea130e3b' added the checks to ensure each of
the hard_limit, soft_limit, and swap_hard_limit wasn't set at
VIR_DOMAIN_MEMORY_PARAM_UNLIMITED - a copy/paste error of using
the 'hard_limit' for each comparison was done. Adjust the code.
John Ferlan [Thu, 11 Sep 2014 21:29:18 +0000 (17:29 -0400)]
virtime: Resolve Coverity DEADCODE
Coverity complains that because of how 'offset' is initialized to
0 (zero), the resulting math and comparison on rem is pointless.
According to the origin commit id '3ec128989', the code is a
replacement for gmtime(), but without the localtime() or GMT
calculations - so just remove this code and add a comment
indicating the removal
This was a false positive where Coverity was complaining that the
remoteDeserializeTypedParameters() could allocate 'params', but
none of the callers could return the allocated memory back to their
caller since on input the param was passed by value. Additionally,
the flow of the code was that if params was NULL on entry, then each
function would return 'nparams' as the number of params entries the
caller would need to allocate in order to call the function again
with 'nparams' and 'params' being set. By the time the deserialize
routine was called params would have something. For other callers
where the 'params' was passed by reference as NULL since it's expected
that the deserialize allocates the memory and then have that passed
back to the original caller to dispose there was no Coverity issue.
As it turns out Coverity didn't quite seem to understand the
relationship between 'nparams' and 'params'; however, if the
!userAllocated path of the deserialize code compared against
limit in any manner, then the Coverity error went away which
was quite strange, but useful.
As it turns out one code path remoteDomainGetJobStats had a
comparison against 'limit' while another remoteConnectGetAllDomainStats
did not assuming that limit would be checked. So I refactored the
code a bit to cause the limit check to occur in deserialize for
both conditions and then only made the check of current returned
size against the incoming *nparams fail the non allocation case.
This means the job code doesn't need to check the limit any more,
while the stats code now does check the limit.
Additionally, to help perhaps decipher which of the various
callers to the deserialize code caused the failure - I used
a #define to pass the __FUNCNAME__ of the caller along so that
error messages could have something like:
error: remoteConnectGetAllDomainStats: too many parameters '2' for nparams '0'
error: Reconnected to the hypervisor
(it's a contrived error just to show the funcname in the error)
node_device_udev: Try harder to get human readable vendor:product
The manufacurer and product from USB device itself are usually not particularly
useful -- they tend to be missing, or ugly (all-uppercase, padded with spaces,
etc.). Prefer what's in the usb id database and fall back to descriptors only
if the device is too new to be in database.
Laine Stump [Wed, 10 Sep 2014 17:10:45 +0000 (13:10 -0400)]
network: try to eliminate default network conflict during package install
Sometimes libvirt is installed on a host that is already using the
network 192.168.122.0/24. If the libvirt-daemon-config-network package
is installed, this creates a conflict, since that package has been
hard-coded to create a virtual network that also uses
192.168.122.0/24. In the past libvirt has attempted to warn of /
remediate this situation by checking for conflicting routes when the
network is started, but it turns out that isn't always useful (for
example in the case that the *other* interface/network creating the
conflict hasn't yet been started at the time libvirtd start its own
networks).
This patch attempts to catch the problem earlier - at install
time. During the %post install script for
libvirt-daemon-config-network, we use a case statement to look through
the output of "ip route show" for a route that exactly matches
192.168.122.0/24, and if found we search for a similar route that
*doesn't* match (e.g. 192.168.124.0/24) (note that the search starts
with "124" instead of 123 because of reports of people already
modifying their L1 host's network to 192.168.123.0/24 in an attempt to
solve exactly the problem we are also trying to solve). When we find
an available route, we just replace all occurrences of "122" in the
default.xml that is being created with the newly found 192.168
subnet. This could obviously be made more complicated - examine the
template defaul.xml to automatically determine the existing network
address and mask rather than hard coding it in the specfile, etc, but
this scripting is simpler and gets the job done as long as we continue
to use 192.168.122.0/24 in the template. (If anyone with mad bash
skillz wants to suggest something to do that, by all means please do).
This is intended to at least "further reduce" occurrence of the
problems detailed in:
Eric Blake [Sun, 31 Aug 2014 03:56:19 +0000 (21:56 -0600)]
blockjob: allow finer bandwidth tuning for set speed
We stupidly modeled block job bandwidth after migration
bandwidth, which in turn was an 'unsigned long' and therefore
subject to 32-bit vs. 64-bit interpretations. To work around
the fact that 10-gigabit interfaces are possible but don't fit
within 32 bits, the original interface took the number scaled
as MiB/sec. But this scaling is rather coarse, and it might
be nice to tune bandwidth finer than in megabyte chunks.
Several of the block job calls that can set speed are fed
through a common interface, so it was easier to adjust them all
at once. Note that there is intentionally no flag for the new
virDomainBlockCopy; there, since the API already uses a 64-bit
type always, instead of a possible 32-bit type, and is brand
new, it was easier to just avoid scaling issues. As with the
previous patch that adjusted the query side (commit db33cc24),
omitting the new flag preserves old behavior, and the
documentation now mentions limits of what happens when a 32-bit
machine is on either client or server side.
* include/libvirt/libvirt.h.in (virDomainBlockJobSetSpeedFlags)
(virDomainBlockPullFlags)
(VIR_DOMAIN_BLOCK_REBASE_BANDWIDTH_BYTES)
(VIR_DOMAIN_BLOCK_COMMIT_BANDWIDTH_BYTES): New enums.
* src/libvirt.c (virDomainBlockJobSetSpeed, virDomainBlockPull)
(virDomainBlockRebase, virDomainBlockCommit): Document them.
* src/qemu/qemu_driver.c (qemuDomainBlockJobSetSpeed)
(qemuDomainBlockPull, qemuDomainBlockRebase)
(qemuDomainBlockCommit, qemuDomainBlockJobImpl): Support new flag.
Eric Blake [Mon, 8 Sep 2014 20:53:12 +0000 (14:53 -0600)]
blockcopy: add qemu implementation of new tunables
Upstream qemu 1.4 added some drive-mirror tunables not present
when it was first introduced in 1.3. Management apps may want
to set these in some cases (for example, without tuning
granularity down to sector size, a copy may end up occupying
more bytes than the original because an entire cluster is
copied even when only a sector within the cluster is dirty,
although tuning it down results in more CPU time to do the
copy). I haven't personally needed to use the parameters, but
since they exist, and since the new API supports virTypedParams,
we might as well expose them.
Since the tuning parameters aren't often used, and omitted from
the QMP command when unspecified, I think it is safe to rely on
qemu 1.3 to issue an error about them being unsupported, rather
than trying to create a new capability bit in libvirt.
Meanwhile, all versions of qemu from 1.4 to 2.1 have a bug where
a bad granularity (such as non-power-of-2) gives a poor message:
error: internal error: unable to execute QEMU command 'drive-mirror': Invalid parameter 'drive-virtio-disk0'
because of abuse of QERR_INVALID_PARAMETER (which is supposed to
name the parameter that was given a bad value, rather than the
value passed to some other parameter). I don't see that a
capability check will help, so we'll just live with it (and it
has since been improved in upstream qemu).
Eric Blake [Mon, 25 Aug 2014 21:11:05 +0000 (15:11 -0600)]
blockcopy: add qemu implementation of new API
The hard part of managing the disk copy is already coded; all
this had to do was convert the XML and virTypedParameters into
the internal representation.
With this patch, all blockcopy operations that used the old
API should also work via the new API. Additional extensions,
such as supporting the granularity tunable or a network rather
than file destination, will be added as later patches.
* src/qemu/qemu_driver.c (qemuDomainBlockCopy): New function.
Eric Blake [Fri, 29 Aug 2014 22:30:46 +0000 (16:30 -0600)]
blockcopy: tweak how rebase calls into copy
In order to implement the new virDomainBlockCopy, the existing
block copy internal implementation needs to be adjusted. The
new function will parse XML into a storage source, and parse
typed parameters into integers, then call into the same common
backend. For now, it's easier to keep the same implementation
limits that only local file destinations are suported, but now
the check needs to be explicit. Similar to qemuDomainBlockJobImpl
consuming 'vm', this code also consumes the caller's 'mirror'
description of the destination.
Michal Privoznik [Fri, 12 Sep 2014 11:18:32 +0000 (13:18 +0200)]
formatdomain: Update <loader/> example to match the rest
At the beginning when I was inventing <loader/> attributes and
<nvram/> I've introduced this @readonly attribute to the loader
element. It accepted values 'on' and 'off'. However, later, during the
review process, that has changed to 'yes' and 'no', but the example
XML snippet wasn't updated, so while the description is correct, the
example isn't.
Reported-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Michal Privoznik [Thu, 11 Sep 2014 11:17:11 +0000 (13:17 +0200)]
virDomainUndefineFlags: Allow NVRAM unlinking
When a domain is undefined, there are options to remove it's
managed save state or snapshots. However, there's another file
that libvirt creates per domain: the NVRAM variable store file.
Make sure that the file is not left behind if the domain is
undefined.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
John Ferlan [Thu, 11 Sep 2014 21:45:04 +0000 (17:45 -0400)]
qemu: Resolve Coverity FORWARD_NULL
If we end up at the cleanup lable before we've VIR_EXPAND_N the list,
then calling virQEMUCapsFreeStringList() with a NULL proplist could
theoretically deref proplist if nproplist was set. Coverity doesn't
seem to acknowledge the relationship between proplist and nproplist
assuming in virQEMUCapsFreeStringList that nproplist could be at
least 1 and thus have a null deref. It only seems to follow the
NULL proplist.
John Ferlan [Thu, 11 Sep 2014 21:05:34 +0000 (17:05 -0400)]
virfile: Resolve Coverity RESOURCE_LEAK
With the virGetGroupList() change in place - Coverity further complains
that if we fail to virFork(), the groups will be leaked - which aha seems
to be the case. Adjust the logic to save off the -errno, free the groups,
and then return the value we saved
John Ferlan [Thu, 11 Sep 2014 21:01:12 +0000 (17:01 -0400)]
virutil: Resolve Coverity RESOURCE_LEAK
This ends up being a very bizarre false positive. With an assist from
eblake, the claim is that mgetgroups() could return a -1 value, but yet
still have a groups buffer allocated, yet the example shown doesn't
seem to prove that.
Rather than fret about it, by adding a well placed sa_assert() on the
returned *list value we can "assure" ourselves that the mgetgroups()
failure path won't signal this condition.
John Ferlan [Thu, 11 Sep 2014 20:58:40 +0000 (16:58 -0400)]
daemon: Resolve Coverity RESOURCE_LEAK
With eblake's help - adjust the checks for stdinfd/stdoutfd to ensure the
values are within the range we expect; otherwise the dup2()'s and subsequent
VIR_CLOSE() calls cause Coverity to believe there's a resource leak.
John Ferlan [Thu, 4 Sep 2014 21:08:48 +0000 (17:08 -0400)]
virsh: Resolve Coverity NEGATIVE_RETURNS
Coverity notes that after we VIR_ALLOC_N(params, nparams) a failed call to
virDomainGetCPUStats could result in nparams being set to -1. In that case,
the subsequent virTypedParamsFree in cleanup will pass -1 which isn't good.
Use the returned value as the number of stats to display in the loop as
it will be the value reported from the hypervisor and may be less than
nparams which is OK
If a (floppy) drive isn't selected for snapshot explicitly and is empty
don't try to snapshot it. For external snapshots this would fail as we
can't generate a name for the snapshot from an empty drive.
Michal Privoznik [Fri, 12 Sep 2014 07:01:46 +0000 (09:01 +0200)]
libvirt.spec: Fix permission even for libvirt-driver-qemu
In my previous patch (37d8c75fad) I've tried to fix permissions
for nvram store path. The aim was to give the nvram directory
execute permission so that domain running under other users
than qemu:qemu can access their nvram file. However, my fix
was incomplete as the path belongs to libvirt-driver-qemu
package too and I've fixed it only for the libvirt-daemon
package.
Reported-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Jim Fehlig [Wed, 3 Sep 2014 20:14:50 +0000 (14:14 -0600)]
libxl: fix mapping of libvirt and libxl lifecycle actions
The libxl driver was blindly assigning libvirt's
virDomainLifecycleAction to libxl's libxl_action_on_shutdown, when
in fact the various actions take on different values in these enums.
Introduce helpers to properly map the enum values.
Rename the VIR_MOCK_IMPL* macros to VIR_MOCK_WRAP*
and add new VIR_MOCK_IMPL macros which let you directly
implement overrides in the preloaded source.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Test suites using the port allocator don't want to have different
behaviour depending on whether a port is in use on the host. Add
a VIR_PORT_ALLOCATOR_SKIP_BIND_CHECK which test suites can use
to skip the bind() test. The port allocator will thus only track
ports in use by the test suite process itself. This is fine when
using the port allocator to generate guest configs which won't
actually be launched
Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Jim Fehlig <jfehlig@suse.com>
Michal Privoznik [Thu, 11 Sep 2014 10:09:04 +0000 (12:09 +0200)]
nvram: Fix permissions
I've noticed two problem with the automatically created NVRAM varstore
file. The first, even though I run qemu as root:root for some reason I
get Permission denied when trying to open the _VARS.fd file. The
problem is, the upper directory misses execute permissions, which in
combination with us dropping some capabilities result in EPERM.
The next thing is, that if I switch SELinux to enforcing mode, I get
another EPERM because the vars file is not labeled correctly. It is
passed to qemu as disk and hence should be labelled as disk. QEMU may
write to it eventually, so this is different to kernel or initrd.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
John Ferlan [Thu, 4 Sep 2014 21:21:37 +0000 (17:21 -0400)]
libxl: Resolve Coverity NULL_RETURNS
With all the changes in my previous foray into this code, I forgot to
remove the libxlDomainEventQueue(driver, event); call inside the
dom == NULL condition.
John Ferlan [Thu, 4 Sep 2014 21:18:48 +0000 (17:18 -0400)]
qemu: Resolve Coverity NEGATIVE_RETURNS
Coverity notes that if the virConnectListAllDomains returns a negative
value then the loop at the cleanup label that ends on numDomains will
have issues.
John Ferlan [Thu, 4 Sep 2014 21:11:57 +0000 (17:11 -0400)]
xen: Resolve Coverity NEGATIVE_RETURNS
Coverity notes that if the call to virBitmapParse() returns a negative
value, then when we jump to the error label, the call to
virCapabilitiesClearHostNUMACellCPUTopology() will have issues
with the negative nb_cpus
John Ferlan [Thu, 4 Sep 2014 21:00:30 +0000 (17:00 -0400)]
nodeinfo: Resolve Coverity NEGATIVE_RETURNS
If the virNumaGetNodeCPUs() call fails with -1, then jumping to cleanup
with 'cpus == NULL' and calling virCapabilitiesClearHostNUMACellCPUTopology
will cause issues.
John Ferlan [Thu, 4 Sep 2014 20:50:15 +0000 (16:50 -0400)]
qemu: Resolve Coverity NEGATIVE_RETURNS
In qemuProcessInitPCIAddresses() if qemuMonitorGetAllPCIAddresses()
returns a negative (or zero) value, then no need to call the
qemuProcessDetectPCIAddresses().
John Ferlan [Thu, 4 Sep 2014 21:59:20 +0000 (17:59 -0400)]
network_conf: Resolve Coverity FORWARD_NULL
The code compares def->forwarders when deciding to return 0 at a
couple of points, then uses "def->nfwds" as a way to index into
the def->forwarders array. That reference results in Coverity
complaining that def->forwarders being NULL was checked as part
of an arithmetic OR operation where failure could be any one 5
conditions, but that is not checked when entering the loop to
dereference the array. Changing the comparisons to use nfwds
will clear the warnings
John Ferlan [Thu, 4 Sep 2014 20:40:34 +0000 (16:40 -0400)]
qemu: Resolve Coverity FORWARD_NULL
If the qemuMigrationEatCookie() fails to set mig, we jump to cleanup:
which will call qemuMigrationCancelDriveMirror() without first checking
if mig == NULL
John Ferlan [Thu, 4 Sep 2014 20:37:11 +0000 (16:37 -0400)]
virstring: Resolve Coverity FORWARD_NULL
Perhaps a false positive, but since Coverity doesn't understand the
relationship between the 'count' and the 'strings', rather than leave
the chance the on input 'strings' is NULL and causes a deref - just
check for it and return
John Ferlan [Thu, 4 Sep 2014 20:27:58 +0000 (16:27 -0400)]
network: Resolve Coverity FORWARD_NULL
If the VIR_STRDUP(exptime,...) fails, then we will jump to cleanup,
no need to check if exptime is set which causes Coverity to issue
a complaint in the virStrToLong_ll call because there wasn't a check
for a NULL value while there was one for the reference right after
the VIR_STRDUP().
John Ferlan [Thu, 4 Sep 2014 20:12:44 +0000 (16:12 -0400)]
qemu: Resolve Coverity FORWARD_NULL
If the virJSONValueNewObject() fails, then rather than going to error
and getting a Coverity false positive since it doesn't seem to understand
the relationship between nkeywords, keywords, and values and seems to
believe calling qemuFreeKeywords will cause a NULL deref - just return NULL
John Ferlan [Thu, 4 Sep 2014 19:42:08 +0000 (15:42 -0400)]
virsh: Resolve Coverity DEADCODE
Coverity points out that if 'dom' isn't returned from virDomainQemuAttach,
then the code already jumps to cleanup, so there was no need for the
subsequent if (dom != NULL) check.
I moved the error message about failure into the goto cleanup on failure
and then removed the if (dom != NULL)
John Ferlan [Thu, 4 Sep 2014 19:08:49 +0000 (15:08 -0400)]
virsh: Resolve Coverity DEADCODE
Coverity points out that by using EMPTYSTR(type) we are guarding against
the possibility that it could be NULL; however, based on how 'type' was
initialized to NULL, then using nested ternary if-then-else's (?:?:)
setting either "ipv4", "ipv6", or "" - there is no way it could be NULL.
Since "-" is supposed to mean something empty in a field - modify the
nested ternary to an easier to read/process if-then-else leaving the
initialization to NULL to mean "-" in the formatted output.
John Ferlan [Thu, 4 Sep 2014 18:46:34 +0000 (14:46 -0400)]
virfile: Resolve Coverity DEADCODE
Adjust the parentheses in/for the waitpid loops; otherwise, Coverity
points out:
(1) Event assignment: Assigning: "waitret" = "waitpid(pid, &status, 0) == -1"
(2) Event between: At condition "waitret == -1", the value of "waitret"
must be between 0 and 1.
(3) Event dead_error_condition: The condition "waitret == -1" cannot
be true.
(4) Event dead_error_begin: Execution cannot reach this statement:
"ret = -*__errno_location();".
However, foo_edited could never be set in the code path - even with
all the goto's since the only way for it to be set is if vir*DefineXML()
succeeds in which case the code to allow a retry (and thus all the goto's)
never leaves foo_edited set
All error paths lead to "cleanup:" which causes both foo and foo_edited
to call the respective vir*Free() routines if set.
John Ferlan [Thu, 4 Sep 2014 14:34:43 +0000 (10:34 -0400)]
storage: Resolve Coverity OVERFLOW_BEFORE_WIDEN
Coverity complains that when multiplying to 32 bit values that eventually
will be stored in a 64 bit value that it's possible the math could
overflow unless one of the values being multiplied is type cast to
the proper size.
John Ferlan [Thu, 4 Sep 2014 14:12:13 +0000 (10:12 -0400)]
qemu: Resolve Coverity REVERSE_INULL
Coverity complains that checking for !domlist after setting doms = domlist
and making a deref of doms just above
It seems the call in question was intended to me made in the case that
'doms' was passed in and not when the virDomainObjListExport() call
allocated domlist and already called virConnectGetAllDomainStatsCheckACL().
Thus rather than check for !domlist - check that "doms != domlist" in
order to avoid the Coverity message.
John Ferlan [Thu, 4 Sep 2014 13:56:06 +0000 (09:56 -0400)]
vbox: Resolve Coverity UNUSED_VALUE
Handle a few places where Coverity complains about the value being
unused. For two of them (Close cases) - the comments above the close
indicate there is no harm to ignore the error - so added an ignore_value.
For the other condition, added an rc check like other callers.
John Ferlan [Wed, 3 Sep 2014 19:10:56 +0000 (15:10 -0400)]
qemu_driver: Resolve Coverity COPY_PASTE_ERROR
In qemuDomainSetBlkioParameters(), Coverity points out that the calls
to qemuDomainParseBlkioDeviceStr() are slightly different and points
out there may be a cut-n-paste error.
In the first call (AFFECT_LIVE), the second parameter is "param->field";
however, for the second call (AFFECT_CONFIG), the second parameter is
"params->field". It seems the "param->field" is correct especially since
each path as a setting of "param" to "¶ms[i]". Furthermore, there
were a few more instances of using "params[i]" instead of "param->"
which I cleaned up.
Michal Privoznik [Thu, 11 Sep 2014 08:04:35 +0000 (10:04 +0200)]
selinux: Properly check TAP FD label
After a4431931 the TAP FDs ale labeled with image label instead
of the process label. On the other hand, the commit was
incomplete as a few lines above, there's still old check for the
process label presence while it should be check for the image
label instead.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Peter Krempa [Wed, 10 Sep 2014 08:46:41 +0000 (10:46 +0200)]
virsh: desc command in --title mode mentions description instead of title
Tweak the messages so that they mention "title" rather than
"description" when operating in title mode. Also fixes one missing "%s"
before non-formatted gettext message.
Before:
$ virsh desc --title dom
No description for domain: dom
After:
$ virsh desc --title dom
No title for domain: dom
Michal Privoznik [Wed, 10 Sep 2014 09:47:19 +0000 (11:47 +0200)]
virprocess: Introduce our own setns() wrapper
From time to time weird bugreports occur on the list, e.g [1].
Even though the kernel supports setns syscall, there's an older
glibc in the system that misses a wrapper over the syscall.
Hence, after the configure phase we think there's no setns
support in the system, which is obviously wrong. On the other
hand, we can't rely on linux distributions to provide newer glibc
soon. Therefore we need to introduce the wrapper on or own.
Peter Krempa [Tue, 9 Sep 2014 15:09:58 +0000 (17:09 +0200)]
util: process: Don't report OOM errors in helper
virProcessTranslateStatus is used on error paths that should not spoil
the returned error. As the errors are ignored, use the quiet versions of
virAsprintf to create the message.
When using split UEFI image, it may come handy if libvirt manages per
domain _VARS file automatically. While the _CODE file is RO and can be
shared among multiple domains, you certainly don't want to do that on
the _VARS file. This latter one needs to be per domain. So at the
domain startup process, if it's determined that domain needs _VARS
file it's copied from this master _VARS file. The location of the
master file is configurable in qemu.conf.
Temporary, on per domain basis the location of master NVRAM file can
be overridden by this @template attribute I'm inventing to the
<nvram/> element. All it does is holding path to the master NVRAM file
from which local copy is created. If that's the case, the map in
qemu.conf is not consulted.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com>
where the first line reflects <loader> and the second one <nvram>.
Moreover, these two lines obsolete the -bios argument.
Note that UEFI is unusable without ACPI. This is handled properly now.
Among with this extension, the variable file is expected to be
writable and hence we need security drivers to label it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com>
Up to now, users can configure BIOS via the <loader/> element. With
the upcoming implementation of UEFI this is not enough as BIOS and
UEFI are conceptually different. For instance, while BIOS is ROM, UEFI
is programmable flash (although all writes to code section are
denied). Therefore we need new attribute @type which will
differentiate the two. Then, new attribute @readonly is introduced to
reflect the fact that some images are RO.
Moreover, the OVMF (which is going to be used mostly), works in two
modes:
1) Code and UEFI variable store is mixed in one file.
2) Code and UEFI variable store is separated in two files
The latter has advantage of updating the UEFI code without losing the
configuration. However, in order to represent the latter case we need
yet another XML element: <nvram/>. Currently, it has no additional
attributes, it's just a bare element containing path to the variable
store file.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Acked-by: Laszlo Ersek <lersek@redhat.com> Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Jiri Denemark [Thu, 28 Aug 2014 14:39:58 +0000 (16:39 +0200)]
qemu: Transfer recomputed stats back to source
After the previous commit, migration statistics on the source and
destination hosts are not equal because the destination updated time
statistics. Let's send the result back so that the same data can be
queried on both sides of the migration.
Jiri Denemark [Thu, 28 Aug 2014 14:37:38 +0000 (16:37 +0200)]
qemu: Recompute downtime and total time when migration completes
Total time of a migration and total downtime transfered from a source to
a destination host do not count with the transfer time to the
destination host and with the time elapsed before guest CPUs are
resumed. Thus, source libvirtd remembers when migration started and when
guest CPUs were paused. Both timestamps are transferred to destination
libvirtd which uses them to compute total migration time and total
downtime. Obviously, this requires the time to be synchronized between
the two hosts. The reported times are useless otherwise but they would
be equally useless if we didn't do this recomputation so don't lose
anything by doing it.
Jiri Denemark [Thu, 28 Aug 2014 12:06:10 +0000 (14:06 +0200)]
qemu: Transfer migration statistics to destination
When migrating a transient domain or with VIR_MIGRATE_UNDEFINE_SOURCE
flag, the domain may disappear from source host. And so will migration
statistics associated with the domain. We need to transfer the
statistics at the end of a migration so that they can be queried at the
destination host.
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