Add a path for UEFI VMs for AArch32 VMs, based on the path Debian is using.
libvirt is the de facto canonical location for defining where distros
should place these firmware images, so let's define this path here to try
and minimize distro fragmentation.
The call to qemuBuildDeviceAddressStr() happens no matter
what, so we can move it to the outer possible scope inside
the function.
We can also move the call to virBufferAsprintf() after all
the checks have been performed, where it makes more sense.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
The virDomainDeviceInfo struct is defined in device_conf,
so generic functions that operate on it should also be
defined there rather than in domain_conf.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
This patch addresses the same aspects on PPC the bug 1103314 addressed
on x86.
PCI expander bus creates multiple primary PCI busses, where each of these
busses can be assigned a specific NUMA affinity, which, on x86 is
advertised through ACPI on a per-bus basis.
For SPAPR, a PHB's NUMA affinities are assigned on a per-PHB basis, and
there is no mechanism for advertising NUMA affinities to a guest on a
per-bus basis. So, even if qemu-ppc manages to get some sort of multi-bus
topology working using PXB, there is no way to expose the affinities
of these busses to the guest. It can only be exposed on a per-PHB/per-domain
basis.
So patch enables NUMA node tag in pci-root controller on PPC.
The way to set the NUMA node is through the numa_node option of
spapr-pci-host-bridge device. However for the implicit PHB, the only way
to set the numa_node is from the -global option. The -global option applies
to all the PHBs unless explicitly specified with the option on the
respective PHB of CLI. The default PHB has the emulated devices only, so
the patch prevents setting the NUMA node for the default PHB.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
The patch adds a capability for spapr-pci-host-bridge.numa_node.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Instead of going through two completely different code paths,
one of which repeats the same hardcoded bit of information
three times in rapid succession, depending on whether or not
a firmware list has been provided at configure time, just
provide a reasonable default value and remove the extra code.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
'numad' may return a nodeset which contains NUMA nodes without memory
for certain configurations. Since cgroups code will not be happy using
nodes without memory we need to store only numa nodes with memory in
autoNodeset.
On the other hand autoCpuset should contain cpus also for nodes which
do not have any memory.
A new function virNetDevOpenvswitchUpdateVlan has been created to instruct
OVS of the changes. qemuDomainChangeNet has been modified to handle the
update of the VLAN configuration for a running guest and rely on
virNetDevOpenvswitchUpdateVlan to do the actual update if needed.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Preparation for switching to virFileCache where there are two callbacks,
one to get a new data and second one to load a cached data.
This also removes virQEMUCapsReset which is no longer required.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
It's not required and following patches will change the code.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
Cleanups the code a little bit and reduces amount of arguments passed
throughout the functions.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
While searching for an element using a function it may be
desirable to know the element key for future operation.
Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
Reviewed-by: Jiri Denemark <jdenemar@redhat.com>
At present shared disks can be migrated with either readonly or cache=none. But
cache=directsync should be safe for migration, because both cache=directsync and cache=none
don't use the host page cache, and cache=direct write through qemu block layer cache.
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
Reviewed-by: Wang Yechao <wang.yechao255@zte.com.cn>
Use virStorageSource accessors to check the file and call
virStorageFileAccess before even attempting to stat the target. This
will be helpful once we try to add network destinations for block copy,
since there will be no need to stat them.
When copying to a block device, the block device will already exist. To
allow users using a block device without any preparation, they need to
use the block copy without VIR_DOMAIN_BLOCK_COPY_REUSE_EXT.
This means that if the target is an existing block device we don't need
to prepare it, but we can't reject it as being existing.
To avoid breaking this feature, explicitly assume that existing block
devices will be reused even without that flag explicitly specified,
while skipping attempts to create it.
qemuMonitorDriveMirror still needs to honor the flag as specified by the
user, since qemu overwrites the metadata otherwise.
The refactor to split up storage driver into modules broke the apparmor
helper program, since that did not initialize the storage driver
properly and thus detection of the backing chain could not work.
Register the storage driver backends explicitly. Unfortunately it's now
necessary to link with the full storage driver to satisfy dependencies
of the loadable modules.
Reviewed-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Reported-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Tested-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
The purpose of this function is to tell if the current position
in given FD is in data section or a hole and how much bytes there
is remaining until the end of the section. This is achieved by
couple of lseeks(). The most important part is that we reposition
the FD back, so that the position is unchanged from the caller
POV. And until now the final lseek() back to the original
position was done with no check for errors. And I was convinced
that that's okay since nothing can go wrong. However, review
feedback from a related series persuaded me, that it's better to
be safe than sorry. Therefore, lets check if the final lseek()
succeeded and if it doesn't report an error.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
All the pieces are now in place, so we can finally start
using isolation groups to achieve our initial goal, which is
separating hostdevs from emulated PCI devices while keeping
hostdevs that belong to the same host IOMMU group together.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1280542
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
These rules will make it possible for libvirt to
automatically assign PCI addresses in a way that
respects any isolation constraints devices might
have.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Isolation groups will eventually allow us to make sure certain
devices, eg. PCI hostdevs, are assigned to guest PCI buses in
a way that guarantees improved isolation, error detection and
recovery for machine types and hypervisors that support it,
eg. pSeries guest on QEMU.
This patch merely defines storage for the new information
we're going to need later on and makes sure it is passed from
the hypervisor driver (QEMU / bhyve) down to the generic PCI
address allocation code.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Now that we have a bit more control, let's convert our object into
a lockable object and let that magic handle the create and lock/unlock.
This also involves creating a virNodeDeviceEndAPI in order to handle
the object cleanup for API's that use the Add or Find API's in order
to get a locked/reffed object. The EndAPI will unlock and unref the
object returning NULL to indicate to the caller to not use the obj.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Move the structures to withing virnodedeviceobj.c
Move the typedefs from node_device_conf to virnodedeviceobj.h
Signed-off-by: John Ferlan <jferlan@redhat.com>
In an overall effort to privatize access to virNodeDeviceObj and
virNodeDeviceObjList into the virnodedeviceobj module, move the
object list parsing from node_device_driver and replace with a
call to a virnodedeviceobj helper. This follows other similar
APIs/helpers which peruse the object list looking for some specific
data in order to get/return an @device (virNodeDevice) object to
the caller.
Signed-off-by: John Ferlan <jferlan@redhat.com>
We're about to move the call to nodeDeviceSysfsGetSCSIHostCaps from
node_device_driver into virnodedeviceobj, so move the guts of the code
from the driver specific node_device_linux_sysfs into its own API
since virnodedeviceobj cannot callback into the driver.
Nothing in the code deals with sysfs anyway, as that's hidden by the
various virSCSIHost* and virVHBA* utility function calls.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Create local @obj and @def for the API's rather than referencing the
devs->objs[i][->def->]. It'll make future patches easier to read.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Ensure that any function that walks the node device object list is prefixed
by virNodeDeviceObjList.
Also, modify the @filter param name for virNodeDeviceObjListExport to
be @aclfilter.
Signed-off-by: John Ferlan <jferlan@redhat.com>
In preparation to make things private, make the ->devs be pointers to a
virNodeDeviceObjList and then manage everything inside virnodedeviceobj
Signed-off-by: John Ferlan <jferlan@redhat.com>
Create an allocator for the virNodeDeviceObjPtr - include setting up
the mutex, saving the virNodeDeviceDefPtr, and locking the return object.
Signed-off-by: John Ferlan <jferlan@redhat.com>
- In testDestroyVport rather than use a cleanup label, just return -1
immediately since nothing else is needed.
- In testStoragePoolDestroy, if !privpool, then just return -1 since
nothing else will happen anyway.
- Rather than "goto cleanup;" on failure to virNodeDeviceObjFindByName
an @obj, just return directly. This then allows the cleanup: label code
to not have to check "if (obj)" before calling virNodeDeviceObjUnlock.
This also simplifies some exit logic...
- In testNodeDeviceObjFindByName use an error: label to handle the failure
and don't do the ncaps++ within the VIR_STRDUP() source target index.
Only increment ncaps after success. Easier on eyes at error label too.
- In testNodeDeviceDestroy use "cleanup" rather than "out" for the goto
Signed-off-by: John Ferlan <jferlan@redhat.com>
Rather than passing the object to be removed by reference, pass by value
and then let the caller decide whether or not the object should be free'd
and how to handle the logic afterwards. This includes free'ing the object
and/or setting the local variable to NULL to prevent subsequent unexpected
usage (via something like virNodeDeviceObjRemove in testNodeDeviceDestroy).
For now this function will just handle the remove of the object from the
list for which it was placed during virNodeDeviceObjAssignDef.
This essentially reverts logic from commit id '61148074' that free'd the
device entry on list, set *dev = NULL and returned. Thus fixing a bug in
node_device_hal.c/dev_refresh() which would never call dev_create(udi)
since @dev would have been set to NULL.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Recent refactors made it so that the function may use uninitialized
pointer, but it actually wanted to use a different variable and value
at all.
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
This reverts commit b3e71a8830.
As it turns out this ends up very badly as the @def could be Free'd
even though it's owned by @obj as a result of the AssignDef.
New API will be virNWFilterInstantiateFilterInternal as it's called from
the virNWFilterInstantiateFilter and virNWFilterUpdateInstantiateFilter.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Rename to virNWFilterDoInstantiate to better describe the action.
Also fix the @vmuuid parameter to not have the ATTRIBUTE_UNUSED since it
is used in the call to virNWFilterDHCPSnoopReq.
Signed-off-by: John Ferlan <jferlan@redhat.com>
When looking for slots suitable for a PCI device, libvirt
might need to add an extra PCI controller: for pSeries guests,
we want that extra controller to be a PHB (pci-root) rather
than a PCI bridge.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
PCI bus has to be numbered sequentially, and no index can be
missing, so libvirt will fill in the blanks automatically for
the user.
Up until now, it has done so using either pci-bridge, for machine
types based on legacy PCI, or pcie-root-port, for machine types
based on PCI Express. Neither choice is good for pSeries guests,
where PHBs (pci-root) should be used instead.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Now that the multi-phb support series is in, work on the TODO at
qemuDomainGetMemLockLimitBytes() to arrive at the correct memlock limit
value.
Signed-off-by: Shivaprasad G Bhat <sbhat@linux.vnet.ibm.com>
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Additional PHBs (pci-root controllers) will be created for
the guest using the spapr-pci-host-bridge QEMU device, if
available; the implicit default PHB, while present in the
guest configuration, will be skipped.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1431193
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Usually, a controller with alias 'x' will create a bus with the
same name; however, the bus created by a PHBs with alias 'x' will
be named 'x.0' instead, so we need to account for that.
As an exception to the exception, the implicit PHB that's added
automatically to every pSeries guest creates the 'pci.0' bus.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
This new capability can be used to detect whether a QEMU
binary supports the spapr-pci-host-bridge controller.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
pSeries guests will soon need the new information; luckily,
we can figure it out automatically most of the time, so
users won't have to worry about it.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Adding it to the virDomainControllerPCIModelName enumeration
is enough for existing code to handle it, so parsing and
formatting will work without further tweaking.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
pSeries guests will soon be allowed to have multiple
PHBs (pci-root controllers), meaning the current check
on the controller index no longer applies to them.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
pSeries guests will soon be allowed to have multiple
PHBs (pci-root controllers), which of course means that
all but one of them will have a non-zero index; hence,
we'll need to relax the current check.
However, right now the check is performed in the conf
module, which is generic rather than tied to the QEMU
driver, and where we don't have information such as the
guest machine type available.
To make this change of behavior possible down the line,
we need to move the check from the XML parser to the
drivers. Luckily, only QEMU and bhyve are using PCI
controllers, so this doesn't result in much duplication.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Moving the check and rewriting it this way doesn't alter
the current behavior, but will allow us to special-case
pci-root down the line.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
We will soon need to be able to return a NULL pointer
without the caller considering that an error: to make
it possible, change the return type to int and use
an out parameter for the string instead.
Add some documentation for the function as well.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
The current algorithm for slot allocation tries to be clever
and avoid looking at buses / slots more than once unless it's
necessary. Unfortunately that makes the code more complex,
and it will cause problem later on in some situations unless
even more complex code is added.
Since the performance gains are going to be pretty modest
anyway, we can just get rid of the extra complexity and use a
completely straighforward implementation instead.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
We use hostdev->info frequently enough that having
a shorter name for it makes the code more readable.
We will also be adding even more uses later on.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Move @function after @flags to match other functions in the
same module like virDomainPCIAddressReserveNextAddr().
Also move virDomainPCIAddressReserveNextAddr() closer to
virDomainPCIAddressReserveAddr() in the header file.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
This function was private to the QEMU driver and was,
accordingly, called qemuDomainPCIBusFullyReserved().
However the function is really not QEMU-specific at
all, so it makes sense to move it closer to the
virDomainPCIAddressBus struct it operates on.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
The virDomainDeviceInfoIsSet() function no longer exists.
Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Laine Stump <laine@laine.org>
Modify code to have two spaces between functions, follow function more
recent function formatting w/r/t args per line and function return type
and name on separate lines.
Signed-off-by: John Ferlan <jferlan@redhat.com>
New name is qemuBlockStorageSourceGetGlusterProps and also hardcode the
protocol name rather than calling the ToString function, since this
function can't be made universal.
New name is qemuBlockStorageSourceBuildHostsJSONSocketAddress since it
formats the JSON object in accordance with qemu's SocketAddress type.
Since the new naming in qemu uses 'inet' instead of 'tcp' add a
compatibility layer for gluster which uses the old name.
Rename it to qemuBlockStorageSourceGetBackendProps and refactor it to
return the JSON object instead of filling a pointer since now it's
always expected to return data.
Add logic which will call qemuGetDriveSourceProps only in cases where we
need the JSON representation. This will allow qemuGetDriveSourceProps to
generate the JSON representation for all possible disk sources.
The command line generators for the protocols above hardcoded a default
port number. Since we now always assign it when parsing the source
definition, this ad-hoc code is not required any more.
Fill them in right away rather than having to figure out at runtime
whether they are necessary or not.
virStorageSourceNetworkDefaultPort does not need to be exported any
more.
Since we're storing a virUUIDFormat'd string in our Hash Table, let's
modify the Lookup API to receive a formatted string as well.
Signed-off-by: John Ferlan <jferlan@redhat.com>
This reverts commit e4b980c853.
When a binary links against a .a archive (as opposed to a shared library),
any symbols which are marked as 'weak' get silently dropped. As a result
when the binary later runs, those 'weak' functions have an address of
0x0 and thus crash when run.
This happened with virtlogd and virtlockd because they don't link to
libvirt.so, but instead just libvirt_util.a and libvirt_rpc.a. The
virRandomBits symbols was weak and so left out of the virtlogd &
virtlockd binaries, despite being required by virHashTable functions.
Various other binaries like libvirt_lxc, libvirt_iohelper, etc also
link directly to .a files instead of libvirt.so, so are potentially
at risk of dropping symbols leading to a later runtime crash.
This is normal linker behaviour because a weak symbol is not treated
as undefined, so nothing forces it to be pulled in from the .a You
have to force the linker to pull in weak symbols using -u$SYMNAME
which is not a practical approach.
This risk is silent bad linkage that affects runtime behaviour is
not acceptable for a fix that was merely trying to fix the test
suite. So stop using __weak__ again.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
When libvirt starts a new QEMU domain, it replaces host-model CPUs with
the appropriate custom CPU definition. However, when reconnecting to a
domain started by older libvirt (< 2.3), the domain would still have a
host-model CPU in its active definition.
https://bugzilla.redhat.com/show_bug.cgi?id=1463957
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
qemuProcessReconnect will need to call additional functions which were
originally defined further in qemu_process.c.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Separated from qemuProcessUpdateAndVerifyCPU to handle updating of an
active guest CPU definition according to live data from QEMU.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
In addition to updating a guest CPU definition the function verifies
that all required features are provided to the guest. Let's make it
obvious by calling it qemuProcessUpdateAndVerifyCPU.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Separated from qemuProcessUpdateLiveGuestCPU. The function makes sure
a guest CPU provides all features required by a domain definition.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Separated from qemuProcessUpdateLiveGuestCPU. Its purpose is to fetch
guest CPU data from a running QEMU process. The data can later be used
to verify and update the active guest CPU definition.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
CPU features unknown to a hypervisor will not be present in dataDisabled
even though the features won't naturally be enabled because.
Thus any features we asked for which are not in dataEnabled should be
considered disabled.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
When checking ABI stability between two domain definitions, we first
make migratable copies of them. However, we also asked for the guest CPU
to be updated, even though the updated CPU is supposed to be already
included in the original definitions. Moreover, if we do this on the
destination host during migration, we're potentially updating the
definition with according to an incompatible host CPU.
While updating the CPU when checking ABI stability doesn't make any
sense, it actually just worked because updating the CPU doesn't do
anything for custom CPUs (only host-model CPUs are affected) and we
updated both definitions in the same way.
Less then a year ago commit v2.3.0-rc1~42 stopped updating the CPU in
the definition we got internally and only the user supplied definition
was updated. However, the same commit started updating host-model CPUs
to custom CPUs which are not affected by the request to update the CPU.
So it still seemed to work right, unless a user upgraded libvirt 2.2.0
to a newer version while there were some domains with host-model CPUs
running on the host. Such domains couldn't be migrated with a user
supplied XML since libvirt would complain:
Target CPU mode custom does not match source host-model
The fix is pretty straightforward, we just need to stop updating the CPU
when checking ABI stability.
https://bugzilla.redhat.com/show_bug.cgi?id=1463957
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
Currently the scan of the /proc/mounts file used to find cgroup mount
points doesn't take into account that mount points may hidden by other
mount points. For, example in certain Kubernetes environments the
/proc/mounts contains the following lines:
cgroup /sys/fs/cgroup/net_prio,net_cls cgroup ...
tmpfs /sys/fs/cgroup tmpfs ...
cgroup /sys/fs/cgroup/net_cls,net_prio cgroup ...
In this particular environment the first mount point is hidden by the
second one. The correct mount point is the third one, but libvirt will
never process it because it only checks the first mount point for each
controller (net_cls in this case). So libvirt will try to use the first
mount point, which doesn't actually exist, and the complete detection
process will fail.
To avoid that issue this patch changes the virCgroupDetectMountsFromFile
function so that when there are duplicates it takes the information from
the last line in /proc/mounts. This requires removing the previous
explicit condition to skip duplicates, and adding code to free the
memory used by the processing of duplicated lines.
Related-To: https://bugzilla.redhat.com/1468214
Related-To: https://github.com/kubevirt/libvirt/issues/4
Signed-off-by: Juan Hernandez <jhernand@redhat.com>
After 426dc5eb2 qemuCaps and virDomainDefPtr are unused here,
remove it from the call stack
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Cole Robinson <crobinso@redhat.com>
Obviously, old gcc-s ale sad when a variable shares the name with
a function. And we do have such variable (added in 4d8a914be0):
@mount. Rename it to @mountpoint so that compiler's happy again.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
The way we create devices under /dev is highly linux specific.
For instance we do mknod(), mount(), umount(), etc. Some
platforms are even missing some of these functions. Then again,
as declared in qemuDomainNamespaceAvailable(): namespaces are
linux only. Therefore, to avoid obfuscating the code by trying to
make it compile on weird platforms, just provide a non-linux stub
for qemuDomainAttachDeviceMknodRecursive(). At the same time,
qemuDomainAttachDeviceMknodHelper() which actually calls the
non-existent functions is moved under ifdef __linux__ block since
its only caller is in that block too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1467826
Commit id 'b9b1aa639' was supposed to add logic to set the allocation
for sparse files when wr_highest_offset was zero; however, an unconditional
setting was done just prior. For block devices, this means allocation is
always returning 0 since 'actual-size' will be zero.
Remove the unconditional setting and add the note about it being possible
to still be zero for block devices. As soon as the guest starts writing to
the volume, the allocation value will then be obtainable from qemu via
the wr_highest_offset.
The Win32 platform will fail to link if you use weak symbols
because it is incompatible with exporting symbols in a DLL:
Cannot export virRandomGenerateWWN: symbol wrong type (2 vs 3)
We only need weak symbols for our test suite to do LD_PRELOAD
and this doesn't work on Win32, so we can just drop the hack
for Win32
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
If we exceed a fixed limit in RPC code we get a horrible message
like this, if the parameter type is a 'string', because we forgot
to initialize the error message type field:
$ virsh snapshot-list ostack1
error: too many remote undefineds: 1329 > 1024
It would also be useful to know which RPC call and field was
exceeded. So this patch makes us report:
$ virsh snapshot-list ostack1
error: too many remote undefineds: 1329 > 1024,
in parameter 'names' for 'virDomainSnapshotListNames'
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
On domain startup, bind host or bind service can be omitted
and we will format a working command line.
Extend this to hotplug as well and specify the service to QEMU
even if the host is missing.
https://bugzilla.redhat.com/show_bug.cgi?id=1452441
Currently all mockable functions are annotated with the 'noinline'
attribute. This is insufficient to guarantee that a function can
be reliably mocked with an LD_PRELOAD. The C language spec allows
the compiler to assume there is only a single implementation of
each function. It can thus do things like propagating constant
return values into the caller at compile time, or creating
multiple specialized copies of the function body each optimized
for a different caller. To prevent these optimizations we must
also set the 'noclone' and 'weak' attributes.
This fixes the test suite when libvirt.so is built with CLang
with optimization enabled.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The TODO macro expands to an fprintf() call and is used in several
places in the Xen driver. Anything that wishes to print such debug
messages should use the logging macros. In this case though, all the
places in the Xen driver should have been raising a formal libvirt
error instead. Add proper error handling and delete the TODO macro
to prevent future misuse.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The HOST_NAME_MAX, INET_ADDRSTRLEN and VIR_LOOPBACK_IPV4_ADDR
constants are only used by a handful of files, so are better
kept in virsocketaddr.h or the source file that uses them.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
We only ever test libvirt with GCC or CLang which provides a
GCC compatible compilation environment. Between them, these
compilers cover every important operating system platform,
even Windows.
Mandate their use to make it explicit that we don't care about
compilers like Microsoft VCC or other UNIX vendor C compilers.
GCC 4.4 was picked as the baseline, since RHEL-6 ships 4.4.7
and that lets us remove a large set of checks. There is a slight
issue that CLang reports itself as GCC 4.2, so we must also check
if __clang__ is defined. We could check a particular CLang version
too, but that would require someone to figure out a suitable min
version which is fun because OS-X reports totally different CLang
version numbers from CLang builds on Linux/BSD
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Back in this commit:
commit b436a8ae5c
Author: Fabian Freyer <fabian.freyer@physik.tu-berlin.de>
Date: Thu Jun 9 00:50:35 2016 +0000
gnulib: add getopt module
config-post.h was modified to define __GNUC_PREREQ, but the
original definition was never removed from internal.h, and
that is now dead code since config.h is always the first file
included.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently, the only type of chardev that we create the backend
for in the namespace is type='dev'. This is not enough, other
backends might have files under /dev too. For instance channels
might have a unix socket under /dev (well, bind mounted under
/dev from a different place).
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1462060
Just like in the previous commit, when attaching a file based
device which has its source living under /dev (that is not a
device rather than a regular file), calling mknod() is no help.
We need to:
1) bind mount device to some temporary location
2) enter the namespace
3) move the mount point to desired place
4) umount it in the parent namespace from the temporary location
At the same time, the check in qemuDomainNamespaceSetupDisk makes
no longer sense. Therefore remove it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1462060
When building a qemu namespace we might be dealing with bare
regular files. Files that live under /dev. For instance
/dev/my_awesome_disk:
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/dev/my_awesome_disk'/>
<target dev='vdc' bus='virtio'/>
</disk>
# qemu-img create -f qcow2 /dev/my_awesome_disk 10M
So far we were mknod()-ing them which is
obviously wrong. We need to touch the file and bind mount it to
the original:
1) touch /var/run/libvirt/qemu/fedora.dev/my_awesome_disk
2) mount --bind /dev/my_awesome_disk /var/run/libvirt/qemu/fedora.dev/my_awesome_disk
Later, when the new /dev is built and replaces original /dev the
file is going to live at expected location.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Currently, we silently assume that file we are creating in the
namespace is either a link or a device (character or block one).
This is not always the case. Therefore instead of doing something
wrong, claim about unsupported file type.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Currently, we silently assume that file we are creating in the
namespace is either a link or a device (character or block one).
This is not always the case. Therefore instead of doing something
wrong, claim about unsupported file type.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
This function is going to be used on other places, so
instead of copying code we can just call the function.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1459592
In 290a00e41d I've tried to fix the process of building a
qemu namespace when dealing with file mount points. What I
haven't realized then is that we might be dealing not with just
regular files but also special files (like sockets). Indeed, try
the following:
1) socat unix-listen:/tmp/soket stdio
2) touch /dev/socket
3) mount --bind /tmp/socket /dev/socket
4) virsh start anyDomain
Problem with my previous approach is that I wasn't creating the
temporary location (where mount points under /dev are moved) for
anything but directories and regular files.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
It comes very handy to have source path for chardevs. We already
have such function: virDomainAuditChardevPath() but it's static
and has name not suitable for exposing. Moreover, while exposing
it change its name slightly to virDomainChrSourceDefGetPath.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
If a value of the first level object contains more objects needing
deflattening which would be wrapped in an actual object the function
would not recurse into them.
By this simple addition we can fully deflatten the objects.
As it turns out sometimes users pass in an arbitrarily nested structure
e.g. for the qemu backing chains JSON pseudo protocol. This new
implementation deflattens now a single object fully even with nested
keys.
Additionally it's not necessary now to stick with the "file." prefix for
the properties.
Currently the function would deflatten the object by dropping the 'file'
prefix from the attributes. This does not really scale well or adhere to
the documentation.
Until we refactor the worker to properly deflatten everything we at
least simulate it by adding the "file" wrapper object back.
Users may want to run the init command of a container as a special
user / group. This is achieved by adding <inituser> and <initgroup>
elements. Note that the user can either provide a name or an ID to
specify the user / group to be used.
This commit also fixes a side effect of being able to run the command
as a non-root user: the user needs rights on the tty to allow shell
job control.
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Some containers may want the application to run in a special directory.
Add <initdir> element in the domain configuration to handle this case
and use it in the lxc driver.
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
virCommand is a version of virExec that doesn't fork, however it is
just calling execve and doesn't honors setting uid/gid and pwd.
This commit extrac those pieces from virExec() to a virExecCommon()
function that is called from both virExec() and virCommandExec().
When running an application container, setting environment variables
could be important.
The newly introduced <initenv> tag in domain configuration will allow
setting environment variables to the init program.
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
All of these four functions (virStreamRecvAll, virStreamSendAll,
virStreamSparseRecvAll, virStreamSparseSendAll) take one or more
callback functions that handle various aspects of streams.
However, if any of them fails no error is reported therefore
caller does not know what went wrong.
At the same time, we silently presumed callbacks to set errno on
failure. With this change we should document it explicitly as the
error is not properly reported.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
If one these four functions fail (virStreamRecvAll,
virStreamSendAll, virStreamSparseRecvAll, virStreamSparseSendAll)
the stream is aborted by calling virStreamAbort(). This is a
public API; therefore, the first thing it does is error reset. At
that point any error that caused us to abort stream in the first
place is gone.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Our documentation to the virStreamRecvAll, virStreamSendAll,
virStreamSparseRecvAll, and virStreamSparseSendAll functions
indicates that if these functions fail, then virStreamAbort is
called. But that is not necessarily true. For instance all of
these functions allocate a buffer to work with. If the allocation
fails, no virStreamAbort() is called despite -1 being returned.
It's the same story with argument sanity checks and a lot of
other checks.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
Problem with our error reporting is that the error object is a
thread local variable. That means if there's an error reported
within the I/O thread it gets logged and everything, but later
when the event loop aborts the stream it doesn't see the original
error. So we are left with some generic error. We can do better
if we copy the error message between the threads.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
When the I/O thread quits (e.g. due to an I/O error, lseek()
error, whatever), any subsequent virFDStream API should return
error too. Moreover, when invoking stream event callback, we must
set the VIR_STREAM_EVENT_ERROR flag so that the callback knows
something bad happened.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
