The pciWrite32 function assembled the array of data to be written to the
fd with a bad offset on the last byte. This issue was probably caused by
a typo (14, 24).
Libvirt's helper API's when called directly don't raise the error so
that virsh remembers it. Subsequent calls to libvirt API's might reset
the error.
In case of schedinfo virDomainFree() in the cleanup section resets the
error when virTypedParameterAssignFromStr() fails.
This patch adds function vshSaveLibvirtError() that can be called after
calling libvirt helper APIs to ensure the error is remembered.
This patch adds two labels and gets rid of a ton of duplicated code.
This patch also fixes some error message and switches most of them to
proper error reporting functions.
This patch adds macros to help retrieve configuration values from qemu
driver's configuration. Some configuration options are grouped
together in the process.
Error messages produced while dispatching guest agent commands didn't
have an apparent reference to the fact that they are dealing with guest
agent commands. This patch fixes up some of the messages to contain that
reference.
When no security driver is specified libvirt_lxc segfaults as a debug
message tries to access security labels for the container that are not
present.
This problem was introduced in commit 6c3cf57d6c.
Early jumps to the cleanup label caused a crash of the libvirt_lxc
container helper as the cleanup section called
virLXCControllerDeleteInterfaces(ctrl) without checking the ctrl argument
for NULL. The argument was de-referenced soon after.
$ /usr/libexec/libvirt_lxc
/usr/libexec/libvirt_lxc: missing --name argument for configuration
Segmentation fault
The new model supports following features in addition to those supported
by SandyBridge:
fma, pcid, movbe, fsgsbase, bmi1, hle, avx2, smep, bmi2, erms, invpcid,
rtm
Commit e0c469e58b that fixes the detection
of image chain wasn't complete. Iteration through the backing image
chain has to stop at the last existing image if some of the images are
missing otherwise the backing chain that is cached contains entries with
paths being set to NULL resulting to:
error: Unable to allow access for disk path (null): Bad address
Fortunately stat() is kind enough not to crash when it's presented with
a NULL argument. At least on Linux.
This patch adds a helper to determine if snapshots are external and uses
the helper to fix detection of those in snapshot deletion code.
Snapshots are external if they have an external memory image or if the
disk locations are external. As mixed snapshots are forbidden for now
we need to check just one disk to know.
qemumonitorjsontest creates a temporary directory to hold the socket
that is simulating the monitor socket. The directory containing the
socket wasn't disposed properly at the end of the test leaving garbage
in the temporary folder.
When doing the qemumonitorjsontest on a machine under heavy load the
test tends to deadlock from time to time. This patch adds the hack to
break the event loop that is used in virsh.
The AMD Bulldozer architecture uses so called "Clustered integer core
modules" that count both as threads and cores. This patch expects the
cpu to be detected using the new fallback condition otherwise twice the
number of processors would be detected.
This test data was gathered on an AMD MagnyCours machine that reports it
has only one NUMA node although the hardware is consisting of 4. As
duplicate core id's are ignored the reported topology was bogous. This
should be fixed by the previous patch.
Reported and data provided by George-Cristian Bîrzan.
Lately there were a few reports of the output of the virsh nodeinfo
command being inaccurate. This patch tries to avoid that by checking if
the topology actually makes sense. If it doesn't we then report a
synthetic topology that indicates to the user that the host capabilities
should be checked for the actual topology.
When the libvirt daemon is restarted it tries to reconnect to running
qemu domains. Since commit d38897a5d4 the
re-connection code runs in separate threads. In the original
implementation the maximum of domain ID's (that is used as an
initializer for numbering guests created next) while libvirt was
reconnecting to the guest.
With the threaded implementation this opens a possibility for race
conditions with the thread that is autostarting guests. When there's a
guest running with id 1 and the daemon is restarted. The autostart code
is reached first and spawns the first guest that should be autostarted
as id 1. This results into the following unwanted situation:
# virsh list
Id Name State
----------------------------------------------------
1 guest1 running
1 guest2 running
This patch extracts the detection code before the re-connection threads
are started so that the maximum id of the guests being reconnected to is
known.
The only semantic change created by this is if the guest with greatest ID
quits before we are able to reconnect it's ID is used anyway as the
greatest one as without this patch the greatest ID of a process we could
successfuly reconnect to would be used.
This patch adds support for external disk snapshots of inactive domains.
The snapshot is created by calling using qemu-img by calling:
qemu-img create -f format_of_snapshot -o
backing_file=/path/to/src,backing_fmt=format_of_backing_image
/path/to/snapshot
in case the backing image format is known or probing is allowed and
otherwise:
qemu-img create -f format_of_snapshot -o backing_file=/path/to/src
/path/to/snapshot
on each of the disks selected for snapshotting. This patch also modifies
the snapshot preparing function to support creating external snapshots
and to sanitize arguments. For now the user isn't able to mix external
and internal snapshots but this restriction might be lifted in the
future.
The code that was split out into the qemuDomainSaveMemory expands the
pointer containing the XML description of the domain that it gets from
higher layers. If the pointer changes the old one is invalid and the
upper layer function tries to free it causing an abort.
This patch changes the expansion of the original string to a new
allocation and copy of the contents.
Some of the pre-snapshot check have restrictions wired in regarding
configuration options that influence taking of external checkpoints.
This patch removes restrictions that would inhibit taking of such a
snapshot.
This patch adds support to take external system checkpoints.
The functionality is layered on top of the previous disk-only snapshot
code. When the checkpoint is requested the domain memory is saved to the
memory image file using migration to file. (The user may specify to
take the memory image while the guest is live with the
VIR_DOMAIN_SNAPSHOT_CREATE_LIVE flag.)
The memory save image shares format with the image created by
virDomainSave() API.
Before now, libvirt supported only internal snapshots for active guests.
This patch renames this function to qemuDomainSnapshotCreateActiveInternal
to prepare the grounds for external active snapshots.
The new external system checkpoints will require an async job while the
snapshot is taken. This patch adds QEMU_ASYNC_JOB_SNAPSHOT to track this
job type.
The default behavior while creating external checkpoints is to pause the
guest while the memory state is captured. We want the users to sacrifice
space saving for creating the memory save image while the guest is live
to minimize downtime.
This patch adds a flag that causes the guest not to be paused before
taking the snapshot.
*include/libvirt/libvirt.h.in:
- add new paused reason: VIR_DOMAIN_PAUSED_SNAPSHOT
- add new flag for taking snapshot: VIR_DOMAIN_SNAPSHOT_CREATE_LIVE
*tools/virsh-domain-monitor.c:
- add string representation for VIR_DOMAIN_PAUSED_SNAPSHOT
*tools/virsh-snapshot.c:
- add support for VIR_DOMAIN_SNAPSHOT_CREATE_LIVE
*tools/virsh.pod:
- add docs for --live option added to use
VIR_DOMAIN_SNAPSHOT_CREATE_LIVE flag
The code that saves domain memory by migration to file can be reused
while doing external checkpoints of a machine. This patch extracts the
common code and places it in a separate function.
When pausing the guest while migration is running (to speed up
convergence) the virDomainSuspend API checks if the migration job is
active before entering the job. This could cause a possible race if the
virDomainSuspend is called while the job is active but ends before the
Suspend API enters the job (this would require that the migration is
aborted). This would cause a incorrect event to be emitted.
When assigning the new persistent definition for a transient network
(thus making it persistent) the network needs to be marked persistent
before actually atempting to assign the definition.
Until now, the network undefine API was able to undefine only inactive
networks. The restriction doesn't make sense any more so this patch
implements changing networks to transient.
When a transient network was created some of the checks weren't run on
the definition allowing to start invalid networks.
This patch splits out code to the network validation function and
re-uses that code when creating transient networks.
The network driver didn't care about config files when a network was
destroyed, just when it was undefined leaving behind files for transient
networks.
This patch splits out the cleanup code to a helper function that handles
the cleanup if the inactive network object is being removed and re-uses
this code when getting rid of inactive networks.
The hosts file was created in the network definition function. This
patch moves the place the file is being created to the point where
dnsmasq is being started.
There are multiple reasons canonicalize_file_name() used in
absolutePathFromBaseFile helper can fail. This patch enhances error
reporting from that helper.
Qemu has added some new feature flags. This patch adds them to libvirt.
The new features are for the cpuid function 0x7 that takes an argument
in the ecx register. Currently only 0x0 is used as the argument so I was
lazy and I just clear the registers to 0 before calling cpuid. In future
when there maybe will be some other possible arguments, we will need to
improve the cpu detection code to take this into account.
Hypervisors are starting to support HyperV Enlightenment features that
improve behavior of guests running Microsoft Windows operating systems.
This patch adds support for the "relaxed" feature that improves timer
behavior and also establishes a framework to add these features in
future.
libssh2 unfortunately doesn't support symbol versioning so RPM can't
figure out what version is needed for the currently installed libvirt
package. This patch adds a runtime requirement, so that the correct
version of libssh2 can be installed along with libvirt.
Libssh2 transport support was enabled lately but the spec file wasn't
updated to take this into account. This caused libvirt to be built
without libssh2 support in Red Hat based OSes.
The comment stated that you may call qemuDomainObjBeginJobWithDriver
without passing qemud_driver to signal it's not locked.
qemuDomainObjBeginJobWithDriver still accesses the qemud_driver
structure and the lock singaling is done through a separate parameter.
When doing snapshots, the filesystem freeze function used the agent
entering function that expects the qemud_driver unlocked. This might
cause a deadlock of the qemu driver if the agent does not respond.
The only call path of this function has the qemud_driver locked, so this
patch changes the entering functions to those expecting the driver
locked.
In most of the snapshot API's there's no need to hold the driver lock
the whole time.
This patch adds helper functions that get the domain object in functions
that don't require the driver lock and simplifies call paths from
snapshot-related API's.
The DAC security driver silently ignored errors when parsing the DAC
label and used default values instead.
With a domain containing the following label definition:
<seclabel type='static' model='dac' relabel='yes'>
<label>sdfklsdjlfjklsdjkl</label>
</seclabel>
the domain would start normaly but the disk images would be still owned
by root and no error was displayed.
This patch changes the behavior if the parsing of the label fails (note
that a not present label is not a failure and in this case the default
label should be used) the error isn't masked but is raised that causes
the domain start to fail with a descriptive error message:
virsh # start tr
error: Failed to start domain tr
error: internal error invalid argument: failed to parse DAC seclabel
'sdfklsdjlfjklsdjkl' for domain 'tr'
I also changed the error code to "invalid argument" from "internal
error" and tweaked the various error messages to contain correct and
useful information.
Commit 7a99b0abaf adds a new RPC struct
but one of the members has different names in remote_protocol.x and
remote_protocol-struct breaking make check.
When setting the cpu tunables in virsh you are able to update only a
subset of them. Virsh while doing the update updated all of the
tunables, changed ones with new values and unchanged with old ones.
This is unfortunate as it:
a) might overwrite some other change by a race condition (unprobable)
b) fails with range checking as some of the old values saved might be
out of range
This patch changes the update procedure so that only the changed value
is updated on the host.
This patch also fixes a very unprobable memory leak if the daemon would
return a string tunable parameter, as the typed parameter array was not
cleared.
This patch adds a helper to deal with assigning values to
virTypedParameter structures from strings. The helper parses the value
from the string and assigns it to the corresponding union value.
The quota and period tunables for cpu scheduler accept only a certain
range of values. When changing the live configuration invalid values get
rejected. This check is not performed when changing persistent config.
This patch adds a separate range check, that improves error messages
when changing live config and adds the check for persistent config.
This check is done only when using the API. It is still possible to
specify invalid values in the XML.
This patch tries to clean the code up a little bit and shorten very long
lines.
The apparent semantic change from moving the condition before calling
the setter function is a non-issue here as the setter function is a
no-op when called with both arguments zero.
ESX doesn't use the common virDomainObj implementation so this patch
adds a separate implementation.
This driver supports all currently defined filtering flags, but as with
other drivers some combinations yield a empty result list.
Hyperv doesn't use the common virDomainObj implementation so this patch
adds a separate implementation.
This driver supports all currently added flags for filtering although
some of those don't make sense with this driver (no support yet) and
thus produce no output when used.
Now that vshCommandRun() checks for the connection automaticaly, remove
all of the redundant checks in the code.
vshConnectionUsability() no longer needs to be exported and this patch
marks it static.
Almost each virsh command uses the function vshConnectionUsability
before doing anything, to check if the connection is "alive". Commands
that don't need an conection are already conveniently marked with
VSH_CMD_FLAG_NOCONNECT. We can automaticaly check for the connection
before calling any remote command so we don't forget to do so.
This patch also upgrades the connection check to use virConnectIsAlive
along with the current approach.
virDomainVcpuPinAdd does a realloc on vcpupin_list if the new vcpu pin
definition doesn't fit into the array. The list is an array of pointers
but the function definition didn't support returning the changed pointer
to the caller if it was realloced. This caused segfaults if realloc
would change the base pointer.
virDomainVcpuPinDefCopy when the control flow reaches out of memory
cleanup code, the flow would end in a infinite loop as the loop variable
wasn't decremented.
Also a dereference of NULL pointers was possible if allocation of the
Vcpu pinning definiton structure failed.
Commit d0c0e79ac6 left behind some dead
code (hasDAC can't be efectively set to true, because
virSecurityManagerNew fails to load the "dac" driver).
This patch also enhances the condition for adding the default
auto-detected security manager if the manager array is allocated but
empty.
Also the configuration file for qemu driver still contains reference to
the DAC driver that can't be enabled manualy.
The security driver loading code in qemu has a flaw that causes it to
register the DAC security driver twice. This causes problems (machines
unable to start) as the two DAC drivers clash together.
This patch refactors the code to allow loading the DAC driver even if
its specified in configuration (it can't be registered as a common
security driver), and does not add the driver twice.
This reverts commit 9f9b7b85c9.
The DAC security driver needs special handling and extra parameters and
can't just be added to regular security drivers.
When starting a machine the DAC security driver tries to set the UID and
GID of the newly spawned process. This worked as desired if the desired
label was set. When the label was missing a logical bug in
virSecurityDACGenLabel() caused that uninitialised values were used as
uid and gid for the new process.
With this patch, default values (from qemu driver configuration)
are used if the label is not found.
getpwuid_r returns success but sets the return structure to NULL when it
fails to deliver data about the requested uid. In our helper code this
created following strange error messages:
" ... cannot getpwuid_r(1234): Success"
This patch creates a more helpful message:
" ... getpwuid_r failed to retrieve data for uid '1234'"
Unfortunately libssh2 doesn't support all types of host keys that can be
saved in the known_hosts file. Also it does not report that parsing of
the file failed. This results into truncated known_hosts files where the
standard client stores keys also in other formats (eg.
ecdsa-sha2-nistp256).
This patch changes the default location of the known_hosts file into the
libvirt private configuration directory, where it will be only written
by the libssh2 layer itself. This prevents trashing user's known_host
file.
The libssh2 code wasn't supposed to create the known_hosts file, but
recent findings show, that we can't use the default created by OpenSSH
as libssh2 might damage it. We need to create a private known_hosts file
in the config path.
This patch adds support for skipping error if the known_hosts file is
not present and let libssh2 create a new one.
This patch adds URI options to support libssh2 transport in the remote
driver.
A new transport sceme is introduced eg. "qemu+libssh2://..." that
utilizes the libssh2 code added in previous patches.
The libssh2 code requires the authentication callback to be able to
perform keyboard-interactive authentication or to ask t passprhases or
add host keys to known hosts database.
Added URI components:
- known_hosts - path to a knownHosts file in OpenSSH format to check
for known ssh host keys
- known_hosts_verify - how to deal with server key verification:
* "normal" (default) - ask to add new keys
* "auto" - automaticaly add new keys
* "ignore" - don't validate host keys
- sshauth - authentication methods to use. Default is
"agent,privkey,keyboard-interactive". It's a comma separated
string of methods to try while authenticating. The order is
preserved. Some of the methods may require additional
parameters.
Locations of the known_hosts file and private keys are set to default
values if they're present. (~/.ssh/known_hosts, ~/.ssh/id_rsa,
~/.ssh/id_dsa)
This patch adds a glue layer to enable using libssh2 code with the
network client code.
As in the original client implementation, shell code is sent to the
server to detect correct options for netcat and connect to libvirt's
unix socket.
This patch enables virNetSocket to be used as an ssh client when
properly configured.
This patch adds function virNetSocketNewConnectLibSSH2() that takes all
needed parameters and creates a libssh2 session and performs steps
needed to open the connection and then create a virNetSocket that
seamlesly encapsulates the communication.
This patch adds helper functions that enable us to use libssh2 in
conjunction with libvirt's virNetSockets for ssh transport instead of
spawning "ssh" client process.
This implemetation supports tunneled plaintext, keyboard-interactive,
private key, ssh agent based and null authentication. Libvirt's Auth
callback is used for interaction with the user. (Keyboard interactive
authentication, adding of host keys, private key passphrases). This
enables seamless integration into the application using libvirt. No
helpers as "ssh-askpass" are needed.
Reading and writing of OpenSSH style "known_hosts" files is supported.
Communication is done using SSH exec channel, where the user may specify
arbitrary command to be executed on the remote side and reads and writes
to/from stdin/out are sent through the ssh channel. Usage of stderr is
not (yet) supported.
This patch introduces a new error code VIR_ERR_OPERATION_UNSUPPORTED to
mark error messages regarding operations that failed due to lack of
support on the hypervisor or other than libvirt issues.
The code is first used in reporting error if qemu does not support block
IO tuning variables yielding error message:
error: Unable to get block I/O throttle parameters
error: Operation not supported: block_io_throttle field
'total_bytes_sec' missing in qemu's output
instead of:
error: Unable to get block I/O throttle parameters
error: internal error cannot read total_bytes_sec
This patch refactors the JSON parsing function that extracts the block
IO tuning parameters from qemu's output. The most impacting change
concerns the error message that is returned if the reply from qemu does
not contain the needed data. The data for IO parameter tuning were added
in qemu 1.1 and the previous error message was confusing.
This patch also breaks long lines and extracts a multiple time used code
pattern to a macro.
Remove spaces before function calls and some other coding nits in some
parts of the remote driver and refactor getting of URI argument
components into variables used by libvirt later on.
Commit ba226d334a tried to fix crash of
the daemon when a domain with an open console was destroyed. The fix was
wrong as it tried to remove the callback also when the stream was
aborted, where at that point the fd stream driver was already freed and
removed.
This patch clears the callbacks with a helper right before the hash is
freed, so that it doesn't interfere with other codepaths where the
stream object is freed.
The remote driver did not fill the required snapshot parent argument in
the RPC call structure that caused a client crash when trying to use
this new API.
This patch enables the "none" USB controller for qemu guests and adds
valdiation on hot-plugged devices if the guest has USB disabled.
This patch also adds a set of tests to check parsing of domain XMLs that
use the "none" controller and some forbidden situations concerning it.
This patch adds helpers that validate domain's device configuration.
This will be needed later on to verify devices being hot-plugged to
guests. If the guest has no USB bus, then it's not valid to plug a USB
device to that guest.
Libvirt adds a USB controller to the guest even if the user does not
specify any in the XML. This is due to back-compat reasons.
To allow disabling USB for a guest this patch adds a new USB controller
type "none" that disables USB support for the guest.
Commit 6ed5a1b9bd adds close callback
functions to the public API but doesn't add python implementation. This
patch sets the function to be written manually (to fix the build), but
doesn't implement them yet.
Peter Krempa