Found by Coverity. Because there's an "if ((cur = strstr(base, "revision"))
!= NULL) {" followed by a "base = cur" coverity notes that 'base' could
then be NULL causing the return to the top of the "while ((tmp_base =
strstr(base, "processor")) != NULL) {" to have strstr deref a NULL 'base'
pointer because the setting of base at the bottom of the loop is unconditional.
Alter the code to set "base = cur" after processing each key. That will
"ensure" that base doesn't get set to NULL if both "cpu" and "revision"
do no follow a "processor".
While a /proc/cpuinfo file that has a "processor" key but with neither
a "cpu" nor a "revision" doesn't seem feasible, the code is written as if
it could happen, so we have to account for it.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Calls to virFileReadAll after a VIR_ALLOC that return NULL all show
a memory leak since 'ret' isn't virSysinfoDefFree'd and normal path
"return ret" doesn't free outbuf.
Reported by Coverity
Signed-off-by: John Ferlan <jferlan@redhat.com>
Whole implementations along with helper totalling screens of code were
conditionally compiled. That made the code totally unreadable and
untestable. Rename functions to have the architecture in the name so
that all can be compiled at the same time and introduce header to allow
testing them all.
Proposed formal coding conventions encourage defining typedefs for
vir[Blah] and vir[Blah]Ptr separately from the associated struct named
_vir[Blah]:
typedef struct _virBlah virBlah;
typedef virBlah *virBlahPtr;
struct _virBlah {
...
};
At some point in the past, I had submitted several patches using a
more compact style that I prefer, and they were accepted:
typedef struct _virBlah {
...
} virBlah, *virBlahPtr;
Since these are by far a minority among all struct definitions, this
patch changes all those definitions to reflect the style prefered by
the proposal so that there is 100% consistency.
After the system has been booted, it should not change.
Cache the return value of virSystemdHasMachined.
Allow starting and terminating machines with just one
DBus call, instead of three, reducing the chance of
the call timing out.
Also introduce a small function for resetting the cache
to be used in tests.
Both virSystemdTerminateMachine and virSystemdCreateMachine
propagate the error to tell between a non-systemd system
and a hard error.
In virSystemdGetMachineNameByPID both are treated the same,
but an error is ignored by the callers.
Split out the checks into a separate function.
Arguably though, function returning only on success is a very
interesting, although quite impractical concept. Also, the errno isn't
and shouldn't be preserved in this case, since the errno can be directly
fed to the virReportSystemError.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
This will eventually replace virQEMUBuildBufferEscapeComma, however
it's not possible right now. Some parts of the code that uses the
old function needs to be refactored.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
GCC 7 gets upset by
if (!tmp && (size * count))
warning
util/viralloc.c: In function 'virReallocN':
util/viralloc.c:246:23: error: '*' in boolean context, suggest '&&' instead [-Werror=int-in-bool-context]
if (!tmp && (size * count)) {
~~~~~~^~~~~~~~
Keep it happy by adding != 0 to the right hand expression
so it realizes we really are wanting to treat the result
of the arithmetic expression as a boolean
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The 'raw' block driver in Qemu is not directly interesting from
libvirt's perspective, but it can be layered above some other block
drivers and this may be interesting for the user.
The patch adds support for the 'raw' block driver. The driver is treated
simply as a pass-through and child driver in JSON is queried to get the
necessary information.
Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
Split virStorageSourceParseBackingJSON into two functions so that the
core can be reused by other functions. The new function called
virStorageSourceParseBackingJSONInternal accepts virJSONValuePtr.
Signed-off-by: Tomáš Golembiovský <tgolembi@redhat.com>
The utils code should stay separated from other code (except for very
well justified cases). Unfortunately commit 272769beccd7479c75e700a6cb
made it trivial to break the separation (and not get slapped by the
syntax-check rule) by adding -I src/conf to the CFLAGS for utils.
Remove this shortcut and except the two offenders from the syntax check
so that the codebase can be kept separated.
Create a virscsihost.c and place the functions there. That removes the
last #ifdef __linux__ from virutil.c.
Take the opporunity to also change the function names and in one case
the parameters slightly
Rather than have them mixed in with the virutil apis, create a separate
virvhba.c module and move the vHBA related calls into there. Soon there
will be more added.
Also modify the names of the functions and some arguments to be more
indicative of what is really happening. Adjust the callers respectively.
While I was changing fchosttest, rather than the non-descriptive names
test1...test6, rename them to match what the test is doing.
Before 9c17d665fdc5f (v1.3.2 - I know, right?) it was possible to
have the following interface configuration:
<interface type='ethernet'/>
<script path=''/>
</interface>
This resulted in -netdev tap,script=,.. Fortunately, qemu helped
us to get away with this as it just ignored the empty script
path. However, after the commit mentioned above it's libvirtd
who is executing the script. Unfortunately without special
case-ing empty script path.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Currently disk names do not follow the
(regex) /^[fhv]d[a-z]+[0-9]*$/ completely
and hence one can assign disk names like
vd2 etc. This patch ensures that the
disk names follow the regex mentioned.
This patch also adds a testcase.
Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
To make sure bit 'b' fits into the bitmap, we need to allocate b+1
bits, since we number from 0.
Adjust the bitmap test to set a bit at a multiple of 16.
That way the test fails without this fix, because the VIR_REALLOC
call clears the newly added memory even if the original pointer
has not changed.
So rather than comparing 2 paths (strings) as they are, which can very
easily lead to unnecessary errors (e.g. in storage driver) that the paths
are not the same when in fact they'd be e.g. just symlinks to the same
location, we should put our best effort into resolving any symlinks and
canonicalizing the path and only then compare the 2 paths for equality.
Signed-off-by: Erik Skultety <eskultet@redhat.com>
Although currently this is documented in virsh man page
and virsh help, the expicit mention in the error message
is helful for tools using the API directly.
Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
After freeing the data structures we have to reset the counters to
zero. This fixes a segmentation fault when virNetDevIPInfoClear is
called twice (e.g. this is possible in virDomainNetDefParseXML() if
virDomainNetIPInfoParseXML(...) fails with ret < 0 (this leads to the
first call of 'virNetDevIPInfoClear(&def->guestIP)') and the resulting
call of virDomainNetDefFree(def) in the error path of
virDomainNetDefParseXML() (this leads to the second call of
virNetDevIPInfoClear(&def->guestIP), and finally to the segmentation
fault).
Signed-off-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com>
Reviewed-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.vnet.ibm.com>
This patchs allows to set the timeout value used for all
openvswitch calls. The default timeout value remains as
before at 5 seconds.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.vnet.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Provide the ability to specify a default timeout value for
successful completion of openvswitch calls in the libvirtd
configuration file.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
Reviewed-by: Bjoern Walk <bwalk@linux.vnet.ibm.com>
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
virNetDevTapCreateInBridgePort() has always set the new tap device to
the current MTU of the bridge it's being attached to. There is one
case where we will want to set the new tap device to a different
(usually larger) MTU - if that's done with the very first device added
to the bridge, the bridge's MTU will be set to the device's MTU. This
patch allows for that possibility by adding "int mtu" to the arg list
for virNetDevTapCreateInBridgePort(), but all callers are sending -1,
so it doesn't yet have any effect.
Since the requested MTU isn't necessarily what is used in the end (for
example, if there is no MTU requested, the tap device will be set to
the current MTU of the bridge), and the hypervisor may want to know
the actual MTU used, we also return the actual MTU to the caller (if
actualMTU is non-NULL).
We will need to traverse the symlinks one step at the time.
Therefore we need to see where a symlink is pointing to.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The comment to the function states that the errors from the child
process are reported. Well, the error buffer is filled with
possible error messages. But then it is thrown away. Among with
important error message from the child process.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Originally/discovered proposed by "Wang King <king.wang@huawei.com>"
When the virCloseCallbacksSet is first called, it increments the refcnt
on the domain object to ensure it doesn't get deleted before the callback
is called. The refcnt would be decremented in virCloseCallbacksUnset once
the entry is removed from the closeCallbacks has table.
When (mostly) normal shutdown occurs, the qemuProcessStop will end up
calling qemuProcessAutoDestroyRemove and will remove the callback from
the list and hash table normally and decrement the refcnt.
However, when qemuConnectClose calls virCloseCallbacksRun, it will scan
the (locked) closeCallbacks list for matching domain and callback function.
If an entry is found, it will be removed from the closeCallbacks list and
placed into a lookaside list to be processed when the closeCallbacks lock
is dropped. The callback function (e.g. qemuProcessAutoDestroy) is called
and will run qemuProcessStop. That code will fail to find the callback
in the list when qemuProcessAutoDestroyRemove is called and thus not decrement
the domain refcnt. Instead since the entry isn't found the code will just
return (mostly) harmlessly.
This patch will resolve the issue by taking another ref during the
search UUID process during virCloseCallackRun, decrementing the refcnt
taken by virCloseCallbacksSet, calling the callback routine and returning
overwriting the vm (since it could return NULL). Finally, it will call the
virDomainObjEndAPI to lower the refcnt and remove the lock taken during
the search UUID processing. This may cause the vm to be destroyed.
Currently, on every --enable perf_event command,
a new event->fd is created and counting of perf
event counter starts from zero and previous
event->fd is lost. This patch prevents this
behaviour.
Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
It is destructive to attempt reset on a pci- or cardbus-bridge, the
host can crash. The bridges won't contain any guest data and neither
they can be passed through using vfio/stub. So, no point in allowing a
reset on them.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Non-endpoint devices like pci-bridges cannot be assigned to guests.
Prevent such attempts.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Avoid return with the closeCallbacks locked when get callbacks list for connect fail.
Signed-off-by: Wang King <king.wang@huawei.com>
Signed-off-by: John Ferlan <jferlan@redhat.com>
Based on work of Mehdi Abaakouk <sileht@sileht.net>.
When parsing vhost-user interface XML and no ifname is found we
can try to fill it in in post parse callback. The way this works
is we try to make up interface name from given socket path and
then ask openvswitch whether it knows the interface.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
File open errors are prevented by a file exists check before
virFileReadAll is called since all callers of the virReadFCHost
method handle errors themselves based on the NULL return anyway.
Also included is a minor spelling correction in a comment.
Signed-off-by: Boris Fiuczynski <fiuczy@linux.vnet.ibm.com>
This is a simple wrapper over mount(). However, not every system
out there is capable of moving a mount point. Therefore, instead
of having to deal with this fact in all the places of our code we
can have a simple wrapper and deal with this fact at just one
place.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Other drivers (like qemu) would like to know if the namespaces
are available therefore it makes sense to move this function to
a shared module.
At the same time, this function had some default namespaces that
are checked with every call. It is not necessary - let callers
pass just those namespaces they are interested in.
With the move the function is renamed to
virProcessNamespaceAvailable.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The code at the very bottom of the DAC secdriver that calls
chown() should be fine with read-only data. If something needs to
be prepared it should have been done beforehand.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This patch adds support and documentation for
a generalized hardware cache event called cache_l1d
perf event.
Signed-off-by: Nitesh Konkar <nitkon12@linux.vnet.ibm.com>
Currently when spawning containers with systemd, the container PID 1
will get moved into the systemd machine slice. Libvirt then manually
moves the libvirt_lxc and qemu-nbd processes into the cgroups associated
with the slice, but skips the systemd controller cgroup. This means that
from systemd's POV, libvirt_lxc and qemu-nbd are still part of the
libvirtd.service unit.
On systemctl daemon-reload, it will notice that libvirt_lxc & qemu-nbd
are in the libvirtd.service unit for the systemd controller, but in the
machine cgroups for resources. Systemd will thus move them back into
the libvirtd.service resource cgroups next time libvirtd is restarted.
This causes libvirtd to kill off the container due to incorrect cgroup
placement.
The solution is to ensure that when moving libvirt_lxc & qemu-nbd, we
also move the systemd cgroup controller placement. Normally this is
not something we ever want todo, but this is a special case as we are
intentionally wanting to move them to a different systemd unit.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently, there's only linux implementation for
virGetFCHostNameByFabricWWN(). Since the symbol is exported in
our private symbols we ought to have implementation for other
platforms too. This also triggers compilation error on FreeBSD:
../src/.libs/libvirt_driver_storage_impl.a(libvirt_driver_storage_impl_la-storage_backend_scsi.o): In function `createVport':
/usr/home/jenkins/libvirt-master/systems/libvirt-freebsd/build/src/../../src/storage/storage_backend_scsi.c:740: undefined reference to `virGetFCHostNameByFabricWWN'
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
