Since the code checks 'mgr == NULL' anyway, no need for the prototype
to have the NONNULL arg check. Also add an error message to indicate what
the failure is so that there isn't a failed for some reason error.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The comparison code used STREQ_NULLABLE anyway for both 'drv_name' and
'dom_name', so no need. Add a NULLSTR on the 'dom_name' too.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The comparison code used STREQ_NULLABLE anyway for both 'drv_name' and
'dom_name', so no need. Add a NULLSTR on the 'dom_name' too.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The code checks and handles a NULL 'str', so just remove the NONNULL.
Update the error message to add the NULLSTR() around 'str' also.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The 'mon' argument validity is checked in the QEMU_CHECK_MONITOR for the
following functions, so they don't need the NONNULL on their prototype:
qemuMonitorUpdateVideoMemorySize
qemuMonitorUpdateVideoVram64Size
qemuMonitorGetAllBlockStatsInfo
qemuMonitorBlockStatsUpdateCapacity
Signed-off-by: John Ferlan <jferlan@redhat.com>
The prototype requires not passing a NULL in the parameter and the callers
all would fail far before this code would fail if 'vm' was NULL, so just
remove the check.
Signed-off-by: John Ferlan <jferlan@redhat.com>
The prototype requires a NONNULL argument and the only caller passes in
a non-null parameter. Besides the "else if" condition would deref it anyway.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Since the code checks and handles NULL parameters, remove the NONNULL
from the prototype.
Also fix the comment in the source to reference the right name.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Since the code checks and handles a NULL 'node' before proceeding
there's no need for the prototype with the NONNULL(2).
Signed-off-by: John Ferlan <jferlan@redhat.com>
If a network is destroyed and restarted, or its bridge is changed, any
tap devices that had previously been connected to the bridge will no
longer be connected. As a first step in automating a reconnection of
all tap devices when this happens, this patch modifies
networkNotifyActualDevice() (which is called once for every
<interface> of every active domain whenever libvirtd is restarted) to
reconnect any tap devices that it finds disconnected.
With this patch in place, you will need to restart libvirtd to
reconnect all the taps to their proper bridges. A future patch will
add a callback that hypervisor drivers can register with the network
driver to that the network driver can trigger this behavior
automatically whenever a network is started.
This patch splits out the part of virNetDevTapCreateInBridgePort()
that would need to be re-done if an existing tap device had to be
re-attached to a bridge, and puts it into a separate function. This
can be used both when an existing domain interface config is updated
to change its connection, and also to re-attach to the "same" bridge
when a network has been stopped and restarted. So far it is used for
nothing.
This function provides the bridge/bond device that the given network
device is attached to. The return value is 0 or -1, and the master
device is a char** argument to the function - this is needed in order
to allow for a "success" return from a device that has no master.
The only reason that the ethtool features weren't being retrieved in
an unprivileged libvirtd was because they required ioctl(), and the
ioctl was using an AF_PACKET socket, which requires root. Now that we
are using AF_UNIX for ioctl(), this restriction can be removed.
The exact family of the socket created for the fd used by ioctl(7)
doesn't matter, it just needs to be a socket and not a file. But for
some reason when macvtap support was added, it used
AF_PACKET/SOCK_DGRAM sockets for its ioctls; we later used the same
AF_PACKET/SOCK_DGRAM socket for new ioctls we added, and eventually
modified the other pre-existing ioctl sockets (for creating/deleting
bridges) to also use AF_PACKET/SOCK_DGRAM (that code originally used
AF_UNIX/SOCK_STREAM).
The problem with using AF_PACKET (intended for sending/receiving "raw"
packets, i.e. packets that can be some protocol other than TCP or UDP)
is that it requires root privileges. This meant that none of the
ioctls in virnetdev.c or virnetdevip.c would work when running
libvirtd unprivileged.
This packet solves that problem by changing the family to AF_UNIX when
creating the socket used for any ioctl().
For some drivers the domain's machine type makes no sense. They
just don't use it. A great example is bhyve driver. Therefore it
makes very less sense to report machine in domain capabilities
XML.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When enabling IPv6 on all interfaces, we may get the host Router
Advertisement routes discarded. To avoid this, the user needs to set
accept_ra to 2 for the interfaces with such routes.
See https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt
on this topic.
To avoid user mistakenly losing routes on their hosts, check
accept_ra values before enabling IPv6 forwarding. If a RA route is
detected, but neither the corresponding device nor global accept_ra
is set to 2, the network will fail to start.
virNetlinkCommand() processes only one response message, while some
netlink commands, like route dumping, need to process several.
Add virNetlinkDumpCommand() as a virNetlinkCommand() sister.
Allow to reuse as much as possible from virNetlinkCommand(). This
comment prepares for the introduction of virNetlinkDumpCommand()
only differing by how it handles the responses.
Commit id '85af0b8' added a 'timeout' as the 4th parameter to
qemuMonitorOpen, but neglected to update the ATTRIBUTE_NONNULL(4)
to be (5) for the cb parameter.
It was pointed out here:
https://bugzilla.redhat.com/show_bug.cgi?id=1331796#c4
that we shouldn't be adding a "no-resolv" to the dnsmasq.conf file for
a network if there isn't any <forwarder> element that specifies an IP
address but no qualifying domain. If there is such an element, it will
handle all DNS requests that weren't otherwise handled by one of the
forwarder entries with a matching domain attribute. If not, then DNS
requests that don't match the domain of any <forwarder> would not be
resolved if we added no-resolv.
So, only add "no-resolv" when there is at least one <forwarder>
element that specifies an IP address but no qualifying domain.
We reported error in caller virQEMUCapsCacheLookupByArch.
So the same error messages in qemuConnectGetDomainCapabilities
is useless.
Signed-off-by: Chen Hanxiao <chenhanxiao@gmail.com>
Calling virCPUUpdateLive on a domain with no guest CPU configuration
does not make sense. Especially when doing so would crash libvirtd.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Use "virStoragePoolObj" as a prefix for any external API in virstorageobj.
Also a couple of functions were local to virstorageobj.c, so remove their
external defs iin virstorageobj.h.
NB: The virStorageVolDef* API's won't change.
Signed-off-by: John Ferlan <jferlan@redhat.com>
In an effort to be consistent with the source module, alter the function
prototypes to follow the similar style of source with the "type" on one
line followed by the function name and arguments on subsequent lines with
with argument getting it's own line.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Alter the format of the code to follow more recent style guidelines of
two empty lines between functions, function decls with "[static] type"
on one line followed by function name with arguments to functions each
on one line.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Move all the StoragePoolObj related API's into their own module
virstorageobj from the storage_conf
Purely code motion at this point, plus adjustments to cleanly build
Signed-off-by: John Ferlan <jferlan@redhat.com>
The log and lock protocol don't have an extra handshake to close the
connection. Instead they just close the socket. Unfortunately that
resulted into a lot of spurious garbage logged to the system log files:
2017-03-17 14:00:09.730+0000: 4714: error : virNetSocketReadWire:1800 : End of file while reading data: Input/output error
or in the journal as:
Mar 13 16:19:33 xxxx virtlogd[32360]: End of file while reading data: Input/output error
Use the new facility in the netserverclient to suppress the IO error
report from the virNetSocket layer.
When starting a domain with custom guest CPU specification QEMU may add
or remove some CPU features. There are several reasons for this, e.g.,
QEMU/KVM does not support some requested features or the definition of
the requested CPU model in libvirt's cpu_map.xml differs from the one
QEMU is using. We can't really avoid this because CPU models are allowed
to change with machine types and libvirt doesn't know (and probably
doesn't even want to know) about such changes.
Thus when we want to make sure guest ABI doesn't change when a domain
gets migrated to another host, we need to update our live CPU definition
according to the CPU QEMU created. Once updated, we will change CPU
checking to VIR_CPU_CHECK_FULL to make sure the virtual CPU created
after migration exactly matches the one on the source.
https://bugzilla.redhat.com/show_bug.cgi?id=822148https://bugzilla.redhat.com/show_bug.cgi?id=824989
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
qemuMonitorGetGuestCPU can now optionally create CPU data from
filtered-features in addition to feature-words.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The checks are now in a dedicated qemuProcessVerifyHypervFeatures
function.
In addition to moving the code this patch also fixes a few bugs: the
original code was leaking cpuFeature and the return value of
virCPUDataCheckFeature was not checked properly.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The attribute can be used to request a specific way of checking whether
the virtual CPU matches created by the hypervisor matches the
specification in domain XML.
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
The disk tuning group parameter is ignored by qemu if no other
throttling options are set. Reject such configuration, since the name
would not be honored after setting parameters via the live tuning API.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1433180
When checking capabilities for qemu we need to check whether subsets of
the disk throttling settings are supported. Extract the checks into a
separate functions as they will be reused in next patch.
While the code path that queries the monitor allocates a separate copy
of the 'group_name' string the path querying the config would not copy
it. The call to virTypedParameterAssign would then steal the pointer
(without clearing it) and the RPC layer freed it. Any subsequent call
resulted into a crash.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1433183
ioh3420 is emulated Intel hardware, so it always looked
quite out of place in aarch64/virt guests. Even for x86/q35
guests, the recently-introduced pcie-root-port is a better
choice because, unlike ioh3420, it doesn't require IO space
(a fairly constrained resource) to work.
If pcie-root-port is available in QEMU, use it; ioh3420 is
still used as fallback for when pcie-root-port is not
available.
Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1408808
QEMU 2.9 introduces the pcie-root-port device, which is
a generic version of the existing ioh3420 device.
Make the new device available to libvirt users.
If the SASL config does not have any mechanisms we currently
just report an empty list to the client which will then
fail to identify a usable mechanism. This is a server config
error, so we should fail immediately on the server side.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Linux still defaults to a 1024 open file handle limit. This causes
scalability problems for libvirtd / virtlockd / virtlogd on large
hosts which might want > 1024 guest to be running. In fact if each
guest needs > 1 FD, we can't even get to 500 guests. This is not
good enough when we see machines with 100's of physical cores and
TBs of RAM.
In comparison to other memory requirements of libvirtd & related
daemons, the resource usage associated with open file handles
is essentially line noise. It is thus reasonable to increase the
limits unconditionally for all installs.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
There were couple of reports on the list (e.g. [1]) that guests
with huge amounts of RAM are unable to start because libvirt
kills qemu in the initialization phase. The problem is that if
guest is configured to use hugepages kernel has to zero them all
out before handing over to qemu process. For instance, 402GiB
worth of 1GiB pages took around 105 seconds (~3.8GiB/s). Since we
do not want to make the timeout for connecting to monitor
configurable, we have to teach libvirt to count with this
fact. This commit implements "1s per each 1GiB of RAM" approach
as suggested here [2].
1: https://www.redhat.com/archives/libvir-list/2017-March/msg00373.html
2: https://www.redhat.com/archives/libvir-list/2017-March/msg00405.html
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
While connecting to qemu monitor, the first thing we do is wait
for it to show up. However, we are doing it with some timeout to
avoid indefinite waits (e.g. when qemu doesn't create the monitor
socket at all). After beaa447a29 we are using exponential back
off timeout meaning, after the first connection attempt we wait
1ms, then 2ms, then 4 and so on. This allows us to bring down
wait time for small domains where qemu initializes quickly.
However, on the other end of this scale are some domains with
huge amounts of guest memory. Now imagine that we've gotten up to
wait time of 15 seconds. The next one is going to be 30 seconds,
and the one after that whole minute. Well, okay - with current
code we are not going to wait longer than 30 seconds in total,
but this is going to change in the next commit.
The exponential back off is usable only for first few iterations.
Then it needs to be caped (one second was chosen as the limit)
and switch to constant wait time.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Fix a "bug" in the storage pool test driver code which "assumed"
testStoragePoolObjSetDefaults should fill in the configFile for
both the Define/Create (persistent) and CreateXML (transient) pools
by just VIR_FREE()'ing it during CreateXML. Because the configFile
was filled in, during Destroy the pool wouldn't be free'd which
could cause issues for future patches which add tests to validate
vHBA creation for the storage pool using the same name.
Commit id 'bb74a7ffe' added a fairly non specific message when providing
only the <parent wwnn='xxx'/> or <parent wwpn='xxx'/> instead of providing
both wwnn and wwpn. This patch just modifies the message to be more specific
about which was missing.
Rather than returning true/false and having the caller check if the
vHBA was actually created, let's do that check within the CreateVport
function. That way the caller can faithfully assume success based
on a name start the thread looking for the LUNs. Prior to this change
it's possible that the vHBA wasn't really created (e.g if the call to
virVHBAGetHostByWWN returned NULL), we'd claim success, but in reality
there'd be no vHBA for the pool. This also fixes a second yet seen
issue that if the nodedev was present, but the parent by name wasn't
provided (perhaps parent by wwnn/wwpn or by fabric_name), then a failure
would be returned. For this path it shouldn't be an error - we should
just be happy that something else is managing the device and we don't
have to create/delete it.
The end result is that the createVport code can now just start the
refresh thread once it gets a non NULL name back.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Move the bulk of createVport and rename to virNodeDeviceCreateVport.
Remove the deleteVport entirely and replace with virNodeDeviceDeleteVport
Signed-off-by: John Ferlan <jferlan@redhat.com>
The function is actually in virutil.c, but prototyped in virfile.h.
This patch fixes that by renaming the function to virWaitForDevices,
adding the prototype in virutil.h and libvirt_private.syms, and then
changing the callers to use the new name.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Move the virStoragePoolSourceAdapter from storage_conf.h and rename
to virStorageAdapter.
Continue with code realignment for brevity and flow.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Rework the code to use the new FCHost specific adapter structures.
Also rework the parameters to only pass what's need and leave logic in
the caller for the adapter type and the need to call the helpers.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Rework the helpers/APIs to use the FCHost and SCSIHost adapter types.
Continue to realign the code for shorter lines.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Rework the helpers/APIs to use the FCHost and SCSIHost adapter types.
Continue to realign the code for shorter lines.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Rather than have lots of ugly inline code, create helpers to try and
make things more readable. While creating the helpers realign the code
as necessary.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Rather than have lots of ugly inline code, create helpers to try and
make things more readable. While creating the helpers realign the code
as necessary.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Rather than use virXPathString, pass along an virXPathNode and alter
the parsing to use virXMLPropString.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Split out the code that munges through the storage pool adapter into
helpers - it's about to be moved into it's own source file.
This is purely code motion at this point.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Commit id 'bb74a7ffe' added some new fields to search for a fchost by
parent wwnn/wwpn or parent_fabric_name, but neglected to validate that
the data within the fields was valid at parse time. This could lead to
eventual failure at run time, so rather than have the failure then, let's
validate now.
Signed-off-by: John Ferlan <jferlan@redhat.com>
https://bugzilla.redhat.com/show_bug.cgi?id=1428209
Commit id 'bb74a7ffe' neglected to check that both the parent_wwnn
parent_wwpn are in the XML if one or the other is similar to how
the node device code checked (commit id '2b13361bc').
If only one is provided, the "default" is to use a vHBA capable
adapter (see commit id '78be2e8b'), so the vHBA could start, but
perhaps not on the expected adapter.
Signed-off-by: John Ferlan <jferlan@redhat.com>
Some users might want to pass a blockdev or a chardev as a
backend for NVDIMM. In fact, this is expected to be the mostly
used configuration. Therefore libvirt should allow the device in
devices CGroup then.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Now that we have APIs for relabel memdevs on hotplug, fill in the
missing implementation in qemu hotplug code.
The qemuSecurity wrappers might look like overkill for now,
because qemu namespace code does not deal with the nvdimms yet.
Nor does our cgroup code. But hey, there's cgroup_device_acl
variable in qemu.conf. If users add their /dev/pmem* device in
there, the device is allowed in cgroups and created in the
namespace so they can successfully passthrough it to the domain.
It doesn't look like overkill after all, does it?
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When domain is being started up, we ought to relabel the host
side of NVDIMM so qemu has access to it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
When domain is being started up, we ought to relabel the host
side of NVDIMM so qemu has access to it.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
For NVDIMM devices it is optionally possible to specify the size
of internal storage for namespaces. Namespaces are a feature that
allows users to partition the NVDIMM for different uses.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Now that NVDIMM has found its way into libvirt, users might want
to fine tune some settings for each module separately. One such
setting is 'share=on|off' for the memory-backend-file object.
This setting - just like its name suggest already - enables
sharing the nvdimm module with other applications. Under the hood
it controls whether qemu mmaps() the file as MAP_PRIVATE or
MAP_SHARED.
Yet again, we have such config knob in domain XML, but it's just
an attribute to numa <cell/>. This does not give fine enough
tuning on per-memdevice basis so we need to have the attribute
for each device too.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
So, majority of the code is just ready as-is. Well, with one
slight change: differentiate between dimm and nvdimm in places
like device alias generation, generating the command line and so
on.
Speaking of the command line, we also need to append 'nvdimm=on'
to the '-machine' argument so that the nvdimm feature is
advertised in the ACPI tables properly.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
NVDIMM is new type of memory introduced into QEMU 2.6. The idea
is that we have a Non-Volatile memory module that keeps the data
persistent across domain reboots.
At the domain XML level, we already have some representation of
'dimm' modules. Long story short, NVDIMM will utilize the
existing <memory/> element that lives under <devices/> by adding
a new attribute 'nvdimm' to the existing @model and introduce a
new <path/> element for <source/> while reusing other fields. The
resulting XML would appear as:
<memory model='nvdimm'>
<source>
<path>/tmp/nvdimm</path>
</source>
<target>
<size unit='KiB'>523264</size>
<node>0</node>
</target>
<address type='dimm' slot='0'/>
</memory>
So far, this is just a XML parser/formatter extension. QEMU
driver implementation is in the next commit.
For more info on NVDIMM visit the following web page:
http://pmem.io/
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Frankly, this function is one big mess. A lot of arguments,
complicated behaviour. It's really surprising that arguments were
in random order (input and output arguments were mixed together),
the documentation was outdated, the description of return values
was bogus.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Even though this variable contains just values from an enum where
zero has the usual meaning, it's enum after all and we should
check it as such.
Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
