Commit Graph

570 Commits

Author SHA1 Message Date
Martin Kletzander
7affb25be9 conf: minor indentation cleanups
On few places there are too many levels of indentation when some of
them can be fixed with negating the option they are in or omitting
useless condition altogether.
2012-12-19 02:21:47 +01:00
Daniel P. Berrange
c25c18f71b Convert capabilities / domain_conf to use virArch
Convert the host capabilities and domain config structs to
use the virArch datatype. Update the parsers and all drivers
to take account of datatype change

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-12-18 16:53:03 +00:00
Daniel P. Berrange
aae0fc2a92 Add support for <hostdev mode="capabilities">
The <hostdev> device type has long had a redundant "mode"
attribute, which has always been "subsys". This finally
introduces a new mode "capabilities", which will be used
by the LXC driver for device assignment. Since container
based virtualization uses a single kernel, the idea of
assigning physical PCI devices doesn't make sense. It is
still reasonable to assign USB devices, but for assigning
arbitrary nodes in /dev, the new 'capabilities' mode is
to be used.

The first capability support is 'storage', which is for
assignment of block devices. Functionally this is really
pretty similar to the <disk> support. The only difference
is the device node name is identical in both host and
container namespaces.

    <hostdev mode='capabilities' type='storage'>
      <source>
        <block>/dev/sdf1</block>
      </source>
    </hostdev>

The second capability support is 'misc', which is for
assignment of character devices. There is no existing
parallel to this. Again the device node is the same
inside & outside the container.

    <hostdev mode='capabilities' type='misc'>
      <source>
        <char>/dev/input/event3</char>
      </source>
    </hostdev>

The reason for keeping the char & storage devices
separate in the domain XML, is to mirror the split
in the node device XML. NB the node device XML does
not yet report character devices, but that's another
new patch to come

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-12-17 17:50:50 +00:00
Guannan Ren
09938bb3b0 conf: add optional attribte primary to video <model> element
If there are multiple video devices
primary = 'yes' marks this video device as the primary one.
The rest are secondary video devices. No more than one could be
mark as primary. If none of them has primary attribute, the first
one will be the primary by default like what it was.
The reason of this changing is that for qemu, only one primary video
device is permitted which can be of any type. For secondary video
devices, only qxl is allowd. Primary attribute removes the restriction
that the first have to be the primary one.

We always put the primary video device into the first position of
video device structure array after parsing.
2012-12-17 14:01:20 +08:00
Daniel P. Berrange
9cdd9ea20e Refactor virDomainHostdevFind method
Move the code for matching hostdev instances out of virDomainHostdevFind
and into virDomainHostdevMatch method, which in turn calls out to other
helper methods depending on the type of hostdev.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-12-12 12:27:53 +00:00
Daniel P. Berrange
50897ffbb6 Slightly refactor hostdev parsing / formating
Rename virDomainHostdevPartsParse to virDomainHostdevDefParseSubsys
to reflect the fact that it only deals with hostdevs uing the
traditional mode=subsystem, and not mode=capabilities

Rename virDomainHostSourceFormat to virDomainHostdevDefFormatSubsys
for the same reason.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-12-12 12:26:53 +00:00
Michal Privoznik
c2fbb3c656 domain: Keep assigned class_id in domstatus XML
Interfaces keeps a class_id, which is an ID from which bridge
part of QoS settings is derived. We need to store class_id
in domain status file, so we can later pass it to
virNetDevBandwidthUnplug.
2012-12-11 18:42:54 +01:00
Michal Privoznik
ec6474b245 bandwidth: add new 'floor' attribute
This is however supported only on domain interfaces with
type='network'. Moreover, target network needs to have at least
inbound QoS set. This is required by hierarchical traffic shaping.

From now on, the required attribute for <inbound/> is either 'average'
(old) or 'floor' (new). This new attribute can be used just for
interfaces type of network (<interface type='network'/>) currently.
2012-12-11 18:35:12 +01:00
Osier Yang
b718ded39a qemu: Allow the user to specify vendor and product for disk
QEMU supports setting vendor and product strings for disk since
1.2.0 (only scsi-disk, scsi-hd, scsi-cd support it), this patch
exposes it with new XML elements <vendor> and <product> of disk
device.
2012-12-07 16:53:27 +08:00
Laine Stump
3738cf41f1 conf: fix virDomainNetGetActualDirect*() and BridgeName()
This resolves:

   https://bugzilla.redhat.com/show_bug.cgi?id=881480

These three functions:

  virDomainNetGetActualBridgeName
  virDomainNetGetActualDirectDev
  virDomainNetGetActualDirectMode

return attributes that are in a union whose contents are interpreted
differently depending on the actual->type and so they should only
return non-0 when actual->type is 'bridge' (in the first case) or
'direct' (in the other two cases, but I had neglected to do that, so
...DirectDev() was returning bridge.brname (which happens to share the
same spot in the union with direct.linkdev) if actual->type was
'bridge', and ...BridgeName was returning direct.linkdev when
actual->type was 'direct'.

How does this involve Bug 881480 (which was about the inability to
switch between two networks that both have "<forward mode='bridge'/>
<bridge name='xxx'/>"? Whenever the return value of
virDomainNetGetActualDirectDev() for the new and old network
definitions doesn't match, qemuDomainChangeNet() requires a "complete
reconnect" of the device, which qemu currently doesn't
support. ...DirectDev() *should* have been returning NULL for old and
new, but was instead returning the old and new bridge names, which
differ.

(The other two functions weren't causing any behavioral problems in
virDomainChangeNet(), but their problem and fix was identical, so I
included them in this same patch).
2012-12-03 14:01:34 -05:00
Ján Tomko
34e5791332 conf: check the return value of virXPathNodeSet
In a few places, the return value could get passed to VIR_ALLOC_N without
being checked, resulting in a request to allocate a lot of memory if the
return value was negative.
2012-11-29 00:00:39 +08:00
Harsh Prateek Bora
a2d2b80fbd Add Gluster protocol as supported network disk backend
This patch introduces the RNG schema and updates necessary data strucutures
to allow various hypervisors to make use of Gluster protocol as one of the
supported network disk backend. Next patch will add support to make use of
this feature in Qemu since it now supports Gluster protocol as one of the
network based storage backend.

Two new optional attributes for <host> element are introduced - 'transport'
and 'socket'. Valid transport values are tcp, unix or rdma. If none specified,
tcp is assumed. If transport is unix, socket specifies path to unix socket.

This patch allows users to specify disks on gluster backends like this:

    <disk type='network' device='disk'>
      <driver name='qemu' type='raw'/>
      <source protocol='gluster' name='Volume1/image'>
        <host name='example.org' port='6000' transport='tcp'/>
      </source>
      <target dev='vda' bus='virtio'/>
    </disk>

    <disk type='network' device='disk'>
      <driver name='qemu' type='raw'/>
      <source protocol='gluster' name='Volume2/image'>
        <host transport='unix' socket='/path/to/sock'/>
      </source>
      <target dev='vdb' bus='virtio'/>
    </disk>

Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com>
2012-11-27 10:19:22 +01:00
Martin Kletzander
03cd6e4ae8 conf: Report sensible error for invalid disk name
The error "... but the cause is unknown" appeared for XMLs similar to
this:

 <disk type='file' device='cdrom'>
   <driver name='qemu' type='raw'/>
   <source file='/dev/zero'/>
   <target dev='sr0'/>
 </disk>

Notice unsupported disk type (for the driver), but also no address
specified. The first part is not a problem and we should not abort
immediately because of that, but the combination with the address
unknown was causing an unspecified error.

While fixing this, I added an error to one place where this return
value was not managed properly.
2012-11-22 15:23:40 +01:00
Ján Tomko
cc244e2441 conf: add support for booting from redirected USB devices
Commit a4c19459aa only added the
QEMU capability flag, command line option and added the boot element
for redirdev's in the XML schema.

This patch adds support for parsing and writing the XML with redirdevs
with the boot flag. It also ignores unknown XML elements in redirdev
instead of failing with:
"error: An error occurred, but the cause is unknown"

Bug: https://bugzilla.redhat.com/show_bug.cgi?id=805414
2012-11-21 17:54:35 +01:00
Eric Blake
0b5617a607 snapshot: make cloning of domain definition easier
Upcoming patches for revert-and-clone branching of snapshots need
to be able to copy a domain definition; make this step reusable.

* src/conf/domain_conf.h (virDomainDefCopy): New prototype.
* src/conf/domain_conf.c (virDomainObjCopyPersistentDef): Split...
(virDomainDefCopy): ...into new function.
(virDomainObjSetDefTransient): Use it.
* src/libvirt_private.syms (domain_conf.h): Export it.
* src/qemu/qemu_driver.c (qemuDomainRevertToSnapshot): Use it.
2012-11-20 08:41:45 -07:00
Laine Stump
89204fca7f qemu: allow larger discrepency between memory & currentMemory in domain xml
This resolves:

  https://bugzilla.redhat.com/show_bug.cgi?id=873134

The reported problem is that an attempt to restore a saved domain that
was configured with <currentMemory> and <memory> set to some (same for
both) number that's not a multiple of 4096KiB results in an error like
this:

  error: Failed to start domain libvirt_test_api
  error: XML error: current memory '4001792k' exceeds maximum '4000768k'

(in this case, currentMemory was set to 4000000KiB).

The reason for this failure is:

1) a saved image contains the "live xml" of the domain at the time of
the save.

2) the live xml of a running domain gets its currentMemory
(a.k.a. cur_balloon) directly from the qemu monitor rather than from
the configuration of the domain.

3) the value reported by qemu is (sometimes) not exactly what was
originally given to qemu when the domain was started, but is rounded
up to [some indeterminate granularity] - in some versions of qemu that
granularity is apparently 1MiB, and in others it is 4MiB.

4) When the XML is parsed to setup the state of the restored domain,
the XML parser for <currentMemory> compares it to <memory> (which is
the maximum allowed memory size for the domain) and if <currentMemory>
is greater than the next 1024KiB boundary above <memory>, it spits out
an error and fails.

For example (from the BZ) if you start qemu on RHEL6 with both
<currentMemory> and <memory> of 4000000 (this number is in KiB),
libvirt's dominfo or dumpxml will report "4001792" back (rounded up to
next 4MiB) for 10-20 seconds after the start, then revert to reporting
"4000000". On Fedora 16 (which uses qemu-1.0), it will instead report
"4000768" (rounded up to next 1MiB). On Fedora 17 (qemu-1.2), it seems
to always report "4000000". ("4000000" is of course okay, and
"4000768" is also okay since that's the next 1024KiB boundary above
"4000000" and the parser was already allowing for that. But "4001792
is *not* okay and produces the error message.)

This patch solves the problem by changing the allowed "fudge factor"
when parsing from 1024KiB to 4096KiB to match the maximum up-rounding
that could be done in qemu.

(I had earlier thought to fix this by up-rounding <memory> in the
dumpxml that's put into the saved image, but that wouldn't have fixed
the case where the save image was produced by an "unfixed"
libvirtd.)
2012-11-16 16:56:41 -05:00
Viktor Mihajlovski
b1c88c1476 capabilities: defaultConsoleTargetType can depend on architecture
For S390, the default console target type cannot be of type 'serial'.
It is necessary to at least interpret the 'arch' attribute
value of the os/type element to produce the correct default type.

Therefore we need to extend the signature of defaultConsoleTargetType
to account for architecture. As a consequence all the drivers
supporting this capability function must be updated.

Despite the amount of changed files, the only change in behavior is
that for S390 the default console target type will be 'virtio'.

N.B.: A more future-proof approach could be to to use hypervisor
specific capabilities to determine the best possible console type.
For instance one could add an opaque private data pointer to the
virCaps structure (in case of QEMU to hold capsCache) which could
then be passed to the defaultConsoleTargetType callback to determine
the console target type.
Seems to be however a bit overengineered for the use case...

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
2012-11-09 09:20:59 -07:00
Daniel P. Berrange
1c04f99970 Remove spurious whitespace between function name & open brackets
The libvirt coding standard is to use 'function(...args...)'
instead of 'function (...args...)'. A non-trivial number of
places did not follow this rule and are fixed in this patch.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-11-02 13:36:49 +00:00
Ján Tomko
0b121614a2 xml: print uuids in the warning
In the XML warning, we print a virsh command line that can be used to
edit that XML. This patch prints UUIDs if the entity name contains
special characters (like shell metacharacters, or "--" that would break
parsing of the XML comment). If the entity doesn't have a UUID, just
print the virsh command that can be used to edit it.
2012-10-29 14:38:43 +01:00
Eric Blake
b3822ed04a blockjob: react to active block copy
For now, disk migration via block copy job is not implemented in
libvirt.  But when we do implement it, we have to deal with the
fact that qemu does not yet provide an easy way to re-start a qemu
process with mirroring still intact.  Paolo has proposed an idea
for a persistent dirty bitmap that might make this possible, but
until that design is complete, it's hard to say what changes
libvirt would need.  Even something like 'virDomainSave' becomes
hairy, if you realize the implications that 'virDomainRestore'
would be stuck with recreating the same mirror layout.

But if we step back and look at the bigger picture, we realize that
the initial client of live storage migration via disk mirroring is
oVirt, which always uses transient domains, and that if a transient
domain is destroyed while a mirror exists, oVirt can easily restart
the storage migration by creating a new domain that visits just the
source storage, with no loss in data.

We can make life a lot easier by being cowards for now, forbidding
certain operations on a domain.  This patch guarantees that we
never get in a state where we would have to restart a domain with
a mirroring block copy, by preventing saves, snapshots, migration,
hot unplug of a disk in use, and conversion to a persistent domain
(thankfully, it is still relatively easy to 'virsh undefine' a
running domain to temporarily make it transient, run tests on
'virsh blockcopy', then 'virsh define' to restore the persistence).
Later, if the qemu design is enhanced, we can relax our code.

The change to qemudDomainDefine looks a bit odd for undoing an
assignment, rather than probing up front to avoid the assignment,
but this is because of how virDomainAssignDef combines both a
lookup and assignment into a single function call.

* src/conf/domain_conf.h (virDomainHasDiskMirror): New prototype.
* src/conf/domain_conf.c (virDomainHasDiskMirror): New function.
* src/libvirt_private.syms (domain_conf.h): Export it.
* src/qemu/qemu_driver.c (qemuDomainSaveInternal)
(qemuDomainSnapshotCreateXML, qemuDomainRevertToSnapshot)
(qemuDomainBlockJobImpl, qemudDomainDefine): Prevent dangerous
actions while block copy is already in action.
* src/qemu/qemu_hotplug.c (qemuDomainDetachDiskDevice): Likewise.
* src/qemu/qemu_migration.c (qemuMigrationIsAllowed): Likewise.
2012-10-27 07:43:38 -06:00
Laine Stump
def31e4c58 qemu: fix attach/detach of netdevs with matching mac addrs
This resolves:

   https://bugzilla.redhat.com/show_bug.cgi?id=862515

which describes inconsistencies in dealing with duplicate mac
addresses on network devices in a domain.

(at any rate, it resolves *almost* everything, and prints out an
informative error message for the one problem that isn't solved, but
has a workaround.)

A synopsis of the problems:

1) you can't do a persistent attach-interface of a device with a mac
address that matches an existing device.

2) you *can* do a live attach-interface of such a device.

3) you *can* directly edit a domain and put in two devices with
matching mac addresses.

4) When running virsh detach-device (live or config), only MAC address
is checked when matching the device to remove, so the first device
with the desired mac address will be removed. This isn't always the
one that's wanted.

5) when running virsh detach-interface (live or config), the only two
items that can be specified to match against are mac address and model
type (virtio, etc) - if multiple netdevs match both of those
attributes, it again just finds the first one added and assumes that
is the only match.

Since it is completely valid to have multiple network devices with the
same MAC address (although it can cause problems in many cases, there
*are* valid use cases), what is needed is:

1) remove the restriction that prohibits doing a persistent add of a
netdev with a duplicate mac address.

2) enhance the backend of virDomainDetachDeviceFlags to check for
something that *is* guaranteed unique (but still work with just mac
address, as long as it yields only a single results.

This patch does three things:

1) removes the check for duplicate mac address during a persistent
netdev attach.

2) unifies the searching for both live and config detach of netdevices
in the subordinate functions of qemuDomainModifyDeviceFlags() to use the
new function virDomainNetFindIdx (which matches mac address and PCI
address if available, checking for duplicates if only mac address was
specified). This function returns -2 if multiple matches are found,
allowing the callers to print out an appropriate message.

Steps 1 & 2 are enough to fully fix the problem when using virsh
attach-device and detach-device (which require an XML description of
the device rather than a bunch of commandline args)

3) modifies the virsh detach-interface command to check for multiple
matches of mac address and show an error message suggesting use of the
detach-device command in cases where there are multiple matching mac
addresses.

Later we should decide how we want to input a PCI address on the virsh
commandline, and enhance detach-interface to take a --address option,
eliminating the need to use detach-device

* src/conf/domain_conf.c
* src/conf/domain_conf.h
* src/libvirt_private.syms
  * added new virDomainNetFindIdx function
  * removed now unused virDomainNetIndexByMac and
    virDomainNetRemoveByMac

* src/qemu/qemu_driver.c
  * remove check for duplicate max from qemuDomainAttachDeviceConfig
  * use virDomainNetFindIdx/virDomainNetRemove instead
    of virDomainNetRemoveByMac in qemuDomainDetachDeviceConfig
  * use virDomainNetFindIdx instead of virDomainIndexByMac
    in qemuDomainUpdateDeviceConfig

* src/qemu/qemu_hotplug.c
  * use virDomainNetFindIdx instead of a homespun loop in
    qemuDomainDetachNetDevice.

* tools/virsh-domain.c: modified detach-interface command as described
    above
2012-10-26 20:47:54 -04:00
Eric Blake
38c4a9cc40 storage: use cache to walk backing chain
We used to walk the backing file chain at least twice per disk,
once to set up cgroup device whitelisting, and once to set up
security labeling.  Rather than walk the chain every iteration,
which possibly includes calls to fork() in order to open root-squashed
NFS files, we can exploit the cache of the previous patch.

* src/conf/domain_conf.h (virDomainDiskDefForeachPath): Alter
signature.
* src/conf/domain_conf.c (virDomainDiskDefForeachPath): Require caller
to supply backing chain via disk, if recursion is desired.
* src/security/security_dac.c
(virSecurityDACSetSecurityImageLabel): Adjust caller.
* src/security/security_selinux.c
(virSecuritySELinuxSetSecurityImageLabel): Likewise.
* src/security/virt-aa-helper.c (get_files): Likewise.
* src/qemu/qemu_cgroup.c (qemuSetupDiskCgroup)
(qemuTeardownDiskCgroup): Likewise.
(qemuSetupCgroup): Pre-populate chain.
2012-10-19 17:35:11 -06:00
Eric Blake
4d34c92947 storage: cache backing chain while qemu domain is live
Technically, we should not be re-probing any file that qemu might
be currently writing to.  As such, we should cache the backing
file chain prior to starting qemu.  This patch adds the cache,
but does not use it until the next patch.

Ultimately, we want to also store the chain in domain XML, so that
it is remembered across libvirtd restarts, and so that the only
kosher way to modify the backing chain of an offline domain will be
through libvirt API calls, but we aren't there yet.  So for now, we
merely invalidate the cache any time we do a live operation that
alters the chain (block-pull, block-commit, external disk snapshot),
as well as tear down the cache when the domain is not running.

* src/conf/domain_conf.h (_virDomainDiskDef): New field.
* src/conf/domain_conf.c (virDomainDiskDefFree): Clean new field.
* src/qemu/qemu_domain.h (qemuDomainDetermineDiskChain): New
prototype.
* src/qemu/qemu_domain.c (qemuDomainDetermineDiskChain): New
function.
* src/qemu/qemu_driver.c (qemuDomainAttachDeviceDiskLive)
(qemuDomainChangeDiskMediaLive): Pre-populate chain.
(qemuDomainSnapshotCreateSingleDiskActive): Uncache chain before
snapshot.
* src/qemu/qemu_process.c (qemuProcessHandleBlockJob): Update
chain after block pull.
2012-10-19 17:35:10 -06:00
Eric Blake
1fc9593271 storage: don't require caller to pre-allocate metadata struct
Requiring pre-allocation was an unusual idiom.  It allowed iteration
over the backing chain to use fewer mallocs, but made one-shot
clients harder to read.  Also, this makes it easier for a future
patch to move away from opening fds on every iteration over the chain.

* src/util/storage_file.h (virStorageFileGetMetadataFromFD): Alter
signature.
* src/util/storage_file.c (virStorageFileGetMetadataFromFD): Allocate
return value.
 (virStorageFileGetMetadata): Update clients.
* src/conf/domain_conf.c (virDomainDiskDefForeachPath): Likewise.
* src/qemu/qemu_driver.c (qemuDomainGetBlockInfo): Likewise.
* src/storage/storage_backend_fs.c (virStorageBackendProbeTarget):
Likewise.
2012-10-19 17:35:10 -06:00
Eric Blake
e5e8d5d082 storage: use enum for disk driver type
Actually use the enum in the domain conf structure.

* src/conf/domain_conf.h (_virDomainDiskDef): Store enum rather
than string for disk type.
* src/conf/domain_conf.c (virDomainDiskDefFree)
(virDomainDiskDefParseXML, virDomainDiskDefFormat)
(virDomainDiskDefForeachPath): Adjust users.
* src/xenxs/xen_sxpr.c (xenParseSxprDisks, xenFormatSxprDisk):
Likewise.
* src/xenxs/xen_xm.c (xenParseXM, xenFormatXMDisk): Likewise.
* src/vbox/vbox_tmpl.c (vboxAttachDrives): Likewise.
* src/libxl/libxl_conf.c (libxlMakeDisk): Likewise.
2012-10-19 17:35:09 -06:00
Eric Blake
09e7fb5e1f storage: use enum for default driver type
Express the default disk type as an enum, for easier handling.

* src/conf/capabilities.h (_virCaps): Store enum rather than
string for disk type.
* src/conf/domain_conf.c (virDomainDiskDefParseXML): Adjust
clients.
* src/qemu/qemu_driver.c (qemuCreateCapabilities): Likewise.
2012-10-19 17:35:09 -06:00
Eric Blake
41e0edaf84 storage: treat 'aio' like 'raw' at parse time
We have historically allowed 'aio' as a synonym for 'raw' for
back-compat to xen, but since a future patch will move to using
an enum value, we have to pick one to be our preferred output
name.  This is a slight change in the output XML, but the sexpr
and xm outputs should still be identical, and the input XML can
still use either form.

* src/conf/domain_conf.c (virDomainDiskDefForeachPath): Move aio
back-compat...
(virDomainDiskDefParseXML): ...to parse time.
* src/xenxs/xen_sxpr.c (xenParseSxprDisks, xenFormatSxprDisk): ...and
to output time.
* src/xenxs/xen_xm.c (xenParseXM, xenFormatXMDisk): Likewise.
* tests/sexpr2xmldata/sexpr2xml-*.xml: Update tests.
2012-10-19 17:35:09 -06:00
Eric Blake
f772b3d91f storage: list more file types
When an image has no backing file, using VIR_STORAGE_FILE_AUTO
for its type is a bit confusing.  Additionally, a future patch
would like to reserve a default value for the case of no file
type specified in the XML, but different from the current use
of -1 to imply probing, since probing is not always safe.

Also, a couple of file types were missing compared to supported
code: libxl supports 'vhd', and qemu supports 'fat' for directories
passed through as a file system.

* src/util/storage_file.h (virStorageFileFormat): Add
VIR_STORAGE_FILE_NONE, VIR_STORAGE_FILE_FAT, VIR_STORAGE_FILE_VHD.
* src/util/storage_file.c (virStorageFileMatchesVersion): Match
documentation when version probing not supported.
(cowGetBackingStore, qcowXGetBackingStore, qcow1GetBackingStore)
(qcow2GetBackingStoreFormat, qedGetBackingStore)
(virStorageFileGetMetadataFromBuf)
(virStorageFileGetMetadataFromFD): Take NONE into account.
* src/conf/domain_conf.c (virDomainDiskDefForeachPath): Likewise.
* src/qemu/qemu_driver.c (qemuDomainGetBlockInfo): Likewise.
* src/conf/storage_conf.c (virStorageVolumeFormatFromString): New
function.
(poolTypeInfo): Use it.
2012-10-19 17:35:09 -06:00
Peter Krempa
cc922fddc3 conf: Add support for HyperV Enlightenment features
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.
2012-10-18 12:22:50 +02:00
Peter Krempa
88cac66d92 conf: Make tri-state feature options more universal
The apic-eoi feature enum and implementation can be made more universal
to allow re-use of the enum for other features.
2012-10-18 12:22:49 +02:00
Martin Kletzander
280b8c9e7c conf: Fix crash with cleanup
There was a crash possible when both <boot dev... and <boot
order... were specified due to virDomainDefParseBootXML() erroring out
before setting *tmp (which was free'd in cleanup).  As a fix, I
created this cleanup that uses one pointer for all the temporary
stored XPath strings and values, plus this pointer is correctly
initialized to NULL.
2012-10-16 11:15:04 +02:00
Guido Günther
dc9d7a171c Avoid straying </cpuset>
by using the same condition as for the <cpuset>.

Fixes "make check" found by
    http://honk.sigxcpu.org:8001/job/libvirt-check/160/
2012-10-15 17:14:25 +08:00
Laine Stump
11c47d979c conf: virDomainDeviceInfoCopy utility function
This does a shallow copy of all the bits, then strdups the two items
that are actually allocated separately.
2012-10-15 04:03:06 -04:00
Osier Yang
5378effd57 conf: Ignore emulatorpin if vcpu placement is auto
When vcpu placement is "auto", the domain process will be pinned
to advisory nodeset from querying numad, While emulatorpin will
override the pinning. That means both of them are to set the
pinning policy for domain process, but conflicts with each other.

This patch ingore emulatorpin if vcpu placement is "auto", because
<vcpu> placement can't be simply ignored for <numatune> placement
could default to it.
2012-10-15 12:19:54 +08:00
Osier Yang
0df1a79089 qemu: Initialize cpuset for hotplugged vcpu as def->cpuset
The onlined vcpu pinning policy should inherit def->cpuset if
it's not specified explicitly, and the affinity should be set
in this case. Oppositely, the offlined vcpu pinning policy should
be free()'ed.
2012-10-15 12:16:02 +08:00
Osier Yang
10f8a45deb conf: Initialize the pinning policy for vcpus
Document for <vcpu>'s "cpuset" says:

Since 0.4.4, this element can contain an optional cpuset attribute,
which is a comma-separated list of physical CPU numbers that virtual
CPUs can be pinned to.

However, it's not the truth, libvirt actually pins the domain
process to the specified pCPUs by "cpuset" of <vcpu>. And the
vcpu thread are pinned to all available pCPUs if no <vcpupin>
is specified for it.

This patch is to implement the codes to inherit <vcpu>'s "cpuset" for
vcpu that doesn't have <vcpupin> specified, and <vcpupin>
for these vcpu will be ignored when formating. Underlying
driver implementation will make sure the vcpu thread pinned
to correct pCPUs.
2012-10-15 12:14:22 +08:00
Osier Yang
60b176c3d0 conf: Ignore vcpupin for not onlined vcpus when parsing
Setting pinning policy for vcpu which exceeds current vcpus number
just makes no sense, however, it could cause various problems, E.g.

<vcpu current='1'>4</vcpu>
<cputune>
  <vcpupin vcpuid='3' cpuset='4'/>
</cputune>

% virsh start linux
error: Failed to start domain linux
error: cannot set CPU affinity on process 32534: No such process

We must have some odd codes underlying which produces the
"on process 32534", but the point is why we not to prevent
earlier when parsing? Note that this is only one of the
problem it could cause.

This patch is to ignore the <vcpupin> for not onlined vcpus.
2012-10-15 12:13:57 +08:00
Jiri Denemark
f95560b3fe conf: Mark missing optional USB devices in domain XML
When startupPolicy set for a USB devices allows such device to be
missing, there was no way this could be detected from domain XML. With
this patch, libvirt emits a new missing='yes' attribute for such devices
when active domain XML is generated.
2012-10-12 10:55:32 +02:00
Ján Tomko
149c87b49d Various typos and misspellings 2012-10-12 00:03:43 +02:00
Jiri Denemark
bd1282d624 qemu: Make save/restore with USB devices usable
Save/restore with passed through USB devices currently only works if the
USB device can be found at the same USB address where it used to be
before saving a domain. This makes sense in case a user explicitly
configure the USB address in domain XML. However, if the device was
found automatically by vendor/product identification, we should try to
search for that device when restoring the domain and use any device we
find as long as there is only one available. In other words, the USB
device can now be removed and plugged again or the host can be rebooted
between saving and restoring the domain.
2012-10-11 15:11:42 +02:00
Jiri Denemark
28f8dfdccc Add MIGRATABLE flag for virDomainGetXMLDesc
Using VIR_DOMAIN_XML_MIGRATABLE flag, one can request domain's XML
configuration that is suitable for migration or save/restore. Such XML
may contain extra run-time stuff internal to libvirt and some default
configuration may be removed for better compatibility of the XML with
older libvirt releases.

This flag may serve as an easy way to get the XML that can be passed
(after desired modifications) to APIs that accept custom XMLs, such as
virDomainMigrate{,ToURI}2 or virDomainSaveFlags.
2012-10-11 15:11:42 +02:00
Jiri Denemark
e658daeb58 conf: Add support for startupPolicy for USB devices
USB devices can disappear without OS being mad about it, which makes
them ideal for startupPolicy. With this attribute, USB devices can be
configured to be mandatory (the default), requisite (will disappear
during migration if they cannot be found), or completely optional.
2012-10-11 15:11:41 +02:00
Jiri Denemark
76f5bcabe6 conf: Add on_lockfailure event configuration
Using this new element, one can configure an action that should be
performed when resource locks are lost.
2012-10-11 14:41:41 +02:00
Jiri Denemark
d0ea530b00 conf: Rename life cycle actions to event actions
While current on_{poweroff,reboot,crash} action configuration is about
configuring life cycle actions, they can all be considered events and
actions that need to be done on a particular event. Let's generalize the
code by renaming life cycle actions to event actions so that it can be
reused later for non-lifecycle events.
2012-10-11 14:40:54 +02:00
Daniel P. Berrange
5cbb0d37d4 Use size_t instead of int for virDomainDefPtr struct
Many parts of virDomainDefPtr were using 'int' variables as
array length counts. Replace all these with size_t and update
various format strings & API signatures to adapt

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-27 10:11:44 +01:00
Daniel P. Berrange
7307c3c00c Simplify some redundant locking while unref'ing objects
There is no need to hold the mutex when unref'ing
virObject instances

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2012-09-26 10:09:58 +01:00
Richard W.M. Jones
f8b08d0e96 Add <seclabel> to character devices.
This allows the user to control labelling of each character device
separately (the default is to inherit from the VM).

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
2012-09-21 13:43:47 +01:00
Richard W.M. Jones
db2aff6ada Make virSecurityDeviceLabelDefParseXML into generic device <seclabel> parser.
This is just code motion, allowing us to reuse the same function to
parse the <seclabel> from character devices too.

However it also fixes a possible segfault in the original code if
VIR_ALLOC_N returns an error and the cleanup code (at the error:
label) tries to iterate over the unallocated array (thanks Michal
Privoznik for spotting this).

Signed-off-by: Richard W.M. Jones <rjones@redhat.com>
2012-09-21 13:43:32 +01:00
Eric Blake
4ecb723b9e maint: fix up copyright notice inconsistencies
https://www.gnu.org/licenses/gpl-howto.html recommends that
the 'If not, see <url>.' phrase be a separate sentence.

* tests/securityselinuxhelper.c: Remove doubled line.
* tests/securityselinuxtest.c: Likewise.
* globally: s/;  If/.  If/
2012-09-20 16:30:55 -06:00
Martin Kletzander
78f3666fe9 Add support for limiting guest coredump
Sometimes when guest machine crashes, coredump can get huge due to the
guest memory. This can be limited using madvise(2) system call and is
being used in QEMU hypervisor. This patch adds an option for configuring
that in the domain XML and related documentation.
2012-09-20 16:41:07 +02:00