Commit Graph

367 Commits

Author SHA1 Message Date
Eric Blake
a218c81da2 API: add VIR_TYPED_PARAM_STRING
This allows strings to be transported between client and server
in the context of name-type-value virTypedParameter functions.
For compatibility,

    o new clients will not send strings to old servers, based on
      a feature check
    o new servers will not send strings to old clients without the
      flag VIR_TYPED_PARAM_STRING_OKAY; this will be enforced at
      the RPC layer in the next patch, so that drivers need not
      worry about it in general.  The one exception is that
      virDomainGetSchedulerParameters lacks a flags argument, so
      it must not return a string; drivers that forward that
      function on to virDomainGetSchedulerParametersFlags will
      have to pay attention to the flag.
    o the flag VIR_TYPED_PARAM_STRING_OKAY is set automatically,
      based on a feature check (so far, no driver implements it),
      so clients do not have to worry about it

Future patches can then enable the feature on a per-driver basis.

This patch also ensures that drivers can blindly strdup() field
names (previously, a malicious client could stuff 80 non-NUL bytes
into field and cause a read overrun).

* src/libvirt_internal.h (VIR_DRV_FEATURE_TYPED_PARAM_STRING): New
driver feature.
* src/libvirt.c (virTypedParameterValidateSet)
(virTypedParameterSanitizeGet): New helper functions.
(virDomainSetMemoryParameters, virDomainSetBlkioParameters)
(virDomainSetSchedulerParameters)
(virDomainSetSchedulerParametersFlags)
(virDomainGetMemoryParameters, virDomainGetBlkioParameters)
(virDomainGetSchedulerParameters)
(virDomainGetSchedulerParametersFlags, virDomainBlockStatsFlags):
Use them.
* src/util/util.h (virTypedParameterArrayClear): New helper
function.
* src/util/util.c (virTypedParameterArrayClear): Implement it.
* src/libvirt_private.syms (util.h): Export it.
Based on an initial patch by Hu Tao, with feedback from
Daniel P. Berrange.

Signed-off-by: Eric Blake <eblake@redhat.com>
2011-11-11 17:21:36 -07:00
Daniel P. Berrange
26ff8996b1 Fix naming of constant for disk event
All constants related to events should have a prefix of
VIR_DOMAIN_EVENT_

* include/libvirt/libvirt.h.in, src/qemu/qemu_domain.c:
  Rename VIR_DOMAIN_DISK_CHANGE_MISSING_ON_START to
  VIR_DOMAIN_EVENT_DISK_CHANGE_MISSING_ON_START
2011-11-04 12:16:19 +00:00
Eric Blake
319992d4b6 API: document scheduler parameter names
Document the parameter names that will be used by
virDomain{Get,Set}SchedulerParameters{,Flags}, rather than
hard-coding those names in each driver, to match what is
done with memory, blkio, and blockstats parameters.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_SCHEDULER_CPU_SHARES)
(VIR_DOMAIN_SCHEDULER_VCPU_PERIOD)
(VIR_DOMAIN_SCHEDULER_VCPU_QUOTA, VIR_DOMAIN_SCHEDULER_WEIGHT)
(VIR_DOMAIN_SCHEDULER_CAP, VIR_DOMAIN_SCHEDULER_RESERVATION)
(VIR_DOMAIN_SCHEDULER_LIMIT, VIR_DOMAIN_SCHEDULER_SHARES): New
field name macros.
* src/qemu/qemu_driver.c (qemuSetSchedulerParametersFlags)
(qemuGetSchedulerParametersFlags): Use new defines.
* src/test/test_driver.c (testDomainGetSchedulerParamsFlags)
(testDomainSetSchedulerParamsFlags): Likewise.
* src/xen/xen_hypervisor.c (xenHypervisorGetSchedulerParameters)
(xenHypervisorSetSchedulerParameters): Likewise.
* src/xen/xend_internal.c (xenDaemonGetSchedulerParameters)
(xenDaemonSetSchedulerParameters): Likewise.
* src/lxc/lxc_driver.c (lxcSetSchedulerParametersFlags)
(lxcGetSchedulerParametersFlags): Likewise.
* src/esx/esx_driver.c (esxDomainGetSchedulerParametersFlags)
(esxDomainSetSchedulerParametersFlags): Likewise.
* src/libxl/libxl_driver.c (libxlDomainGetSchedulerParametersFlags)
(libxlDomainSetSchedulerParametersFlags): Likewise.
2011-11-02 13:52:56 -06:00
Sage Weil
536d1f8746 secret: add Ceph secret type
Add a new secret type to store a Ceph authentication key. The name
is simply an identifier for easy human reference.

The xml looks like this:

<secret ephemeral='no' private='no'>
 <uuid>0a81f5b2-8403-7b23-c8d6-21ccc2f80d6f</uuid>
 <usage type='ceph'>
   <name>mycluster_admin</name>
 </usage>
</secret>

Signed-off-by: Sage Weil <sage@newdream.net>
Signed-off-by: Josh Durgin <josh.durgin@dreamhost.net>
2011-10-28 11:34:17 -06:00
Daniel P. Berrange
6aa27da287 Extend graphics event to include UNIX socket
Not all VNC/SPICE servers use a TCP socket for their connections.
It is possible to configure a UNIX socket server. The graphics
event must thus include a UNIX socket address type.

* include/libvirt/libvirt.h.in: Add UNIX socket address type
  for graphics event
* src/qemu/qemu_monitor_json.c: Add 'unix' string to address
  type enum
2011-10-28 10:23:53 +01:00
Daniel P. Berrange
9d96f1ce90 Introduce the virDomainOpenGraphics API
The virDomainOpenGraphics API allows a libvirt client to pass in
a file descriptor for an open socket pair, and get it connected
to the graphics display of the guest. This is limited to working
with local libvirt hypervisors connected over a UNIX domain
socket, since it will use UNIX FD passing

* include/libvirt/libvirt.h.in: Define virDomainOpenGraphics
* src/driver.h: Define driver for virDomainOpenGraphics
* src/libvirt_public.syms, src/libvirt.c: Entry point for
  virDomainOpenGraphics
* src/libvirt_internal.h: VIR_DRV_FEATURE_FD_PASSING
2011-10-28 10:23:51 +01:00
Michal Privoznik
baf2ff7e90 startupPolicy: Emit event on disk source dropping
If a disk source gets dropped because it is not accessible,
mgmt application might want to be informed about this. Therefore
we need to emit an event. The event presented in this patch
is however a bit superset of what written above. The reason is simple:
an intention to be easily expanded, e.g. on 'user ejected disk
in guest' events. Therefore, callback gets source string and disk alias
(which should be unique among a domain) and reason (an integer);
2011-10-25 09:27:10 +02:00
Daniel P. Berrange
777ffbd0e2 Allow for URI aliases when connecting to libvirt
This adds support for a libvirt client configuration file
either /etc/libvirt/libvirt.conf for privileged clients,
or $HOME/.libvirt/libvirt.conf for unprivileged clients.

It allows one parameter

 uri_aliases = [
   "hail=qemu+ssh://root@hail.cloud.example.com/system",
   "sleet=qemu+ssh://root@sleet.cloud.example.com/system",
 ]

Any call to virConnectOpen with a non-NULL URI will first
attempt to match against the uri_aliases list. An application
can disable this by using VIR_CONNECT_NO_ALIASES

* docs/uri.html.in: Document URI aliases
* include/libvirt/libvirt.h.in: Add VIR_CONNECT_NO_ALIASES
* libvirt.spec.in, mingw32-libvirt.spec.in: Add /etc/libvirt/libvirt.conf
* src/Makefile.am: Install default config file
* src/libvirt.c: Add support for URI aliases
* src/remote/remote_driver.c: Don't try to handle URIs
  with no scheme and which clearly are not paths
* src/util/conf.c: Don't raise error on virConfFree(NULL)
* src/xen/xen_driver.c: Don't raise error on URIs
  with no scheme
2011-10-19 09:14:34 +01:00
Philipp Hahn
0a71c79a34 Fix two comments related to error handling
Signed-off-by: Philipp Hahn <hahn@univention.de>
2011-10-17 17:21:56 +02:00
Michal Privoznik
4dadfe59d5 virDomainCoreDump: Introduce VIR_DUMP_RESET flag
This flag is intended to allow user to do so called system reset
after dump, instead of sending ACPI reboot event.
2011-10-13 09:32:27 +02:00
Eric Blake
8b6d1a2068 snapshot: add API for filtering by leaves
Counterpart to --roots.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_SNAPSHOT_LIST_LEAVES):
New flag.
* src/libvirt.c (virDomainSnapshotNum, virDomainSnapshotListNames)
(virDomainSnapshotNumChildren)
(virDomainSnapshotListChildrenNames): Document it.
* tools/virsh.c (cmdSnapshotList): Expose it.
* tools/virsh.pod (snapshot-list): Document --leaves.
2011-10-12 16:03:19 -06:00
Eric Blake
f2013c9dd1 snapshot: new virDomainSnapshotListChildrenNames API
The previous API addition allowed traversal up the hierarchy;
this one makes it easier to traverse down the hierarchy.

In the python bindings, virDomainSnapshotNumChildren can be
generated, but virDomainSnapshotListChildrenNames had to copy
from the hand-written example of virDomainSnapshotListNames.

* include/libvirt/libvirt.h.in (virDomainSnapshotNumChildren)
(virDomainSnapshotListChildrenNames): New prototypes.
(VIR_DOMAIN_SNAPSHOT_LIST_DESCENDANTS): New flag alias.
* src/libvirt.c (virDomainSnapshotNumChildren)
(virDomainSnapshotListChildrenNames): New functions.
* src/libvirt_public.syms: Export them.
* src/driver.h (virDrvDomainSnapshotNumChildren)
(virDrvDomainSnapshotListChildrenNames): New callbacks.
* python/generator.py (skip_impl, nameFixup): Update lists.
* python/libvirt-override-api.xml: Likewise.
* python/libvirt-override.c
(libvirt_virDomainSnapshotListChildrenNames): New wrapper function.
2011-10-10 16:54:16 -06:00
Eric Blake
dbbe16c26e maint: typo fixes
I noticed a couple typos in recent commits, and fixed the remaining
instances of them.

* docs/internals/command.html.in: Fix spelling errors.
* include/libvirt/libvirt.h.in (virConnectDomainEventCallback):
Likewise.
* python/libvirt-override.py (virEventAddHandle): Likewise.
* src/lxc/lxc_container.c (lxcContainerChild): Likewise.
* src/util/hash.c (virHashCreateFull): Likewise.
* src/storage/storage_backend_logical.c
(virStorageBackendLogicalMakeVol): Likewise.
* src/esx/esx_driver.c (esxFormatVMXFileName): Likewise.
* src/vbox/vbox_tmpl.c (vboxIIDIsEqual_v3_x): Likewise.
2011-10-10 14:02:06 -06:00
Eric Blake
892719f657 maint: fix minor issues in virterror public header
Consistent use of tabs, fewer long lines, and a typo fix.

* include/libvirt/virterror.h: Fix typos, layout.
2011-10-05 12:33:59 -06:00
Eric Blake
3c797404a5 snapshot: add REVERT_FORCE to API
Although reverting to a snapshot is a form of data loss, this is
normally expected.  However, there are two cases where additional
surprises (failure to run the reverted state, or a break in
connectivity to the domain) can come into play.  Requiring extra
acknowledgment in these cases will make it less likely that
someone can get into an unrecoverable state due to a default revert.

Also create a new error code, so users can distinguish when forcing
would make a difference, rather than having to blindly request force.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_SNAPSHOT_REVERT_FORCE):
New flag.
* src/libvirt.c (virDomainRevertToSnapshot): Document it.
* include/libvirt/virterror.h (VIR_ERR_SNAPSHOT_REVERT_RISKY): New
error value.
* src/util/virterror.c (virErrorMsg): Implement it.
* tools/virsh.c (cmdDomainSnapshotRevert): Add --force to virsh.
* tools/virsh.pod (snapshot-revert): Document it.
2011-10-05 11:33:36 -06:00
Guido Günther
ae37001d78 Document that ff callbacks need to be invoked from a clean stack.
Also fix a typo.
2011-10-04 20:29:46 +02:00
Xu He Jie
541ff63615 api: Add public api for 'reset'
Add new public api for 'reset'.
It can reset domain immediately without any guest shutdown.

Signed-off-by: Xu He Jie <xuhj@linux.vnet.ibm.com>
2011-09-29 06:52:42 -06:00
Eric Blake
a2f706de93 snapshot: new virDomainSnapshotGetParent API
Although a client can already obtain a snapshot's parent by
dumping and parsing the xml, then doing a snapshot lookup by
name, it is more efficient to get the parent in one step, which
in turn will make operations that must traverse a snapshot
hierarchy easier to perform.

* include/libvirt/libvirt.h.in (virDomainSnapshotGetParent):
Declare.
* src/libvirt.c (virDomainSnapshotGetParent): New function.
* src/libvirt_public.syms: Export it.
* src/driver.h (virDrvDomainSnapshotGetParent): New callback.
2011-09-28 09:54:56 -06:00
Jiri Denemark
d2d6776342 qemu: Introduce shutdown reason for paused state
Qemu sends STOP event as part of the shutdown process. Detect such STOP
event and consider shutdown to be reason of emitting such event. That's
the best we can do until qemu provides us the reason directly in STOP
event. This allows us to report shutdown reason for paused state so that
apps can detect domains that failed to finish the shutdown process
(e.g., because qemu is buggy and doesn't exit on SIGTERM or it is
blocked in flushing disk buffers).
2011-09-16 17:25:55 +02:00
Eric Blake
6c14439e51 snapshot: new APIs for inspecting snapshot object
These functions access internals of the opaque object, and do
not need any rpc counterpart.  It could be argued that we should
have provided these when snapshot objects were first introduced,
since all the other vir*Ptr objects have at least a GetName accessor.

* include/libvirt/libvirt.h.in (virDomainSnapshotGetName)
(virDomainSnapshotGetDomain, virDomainSnapshotGetConnect): Declare.
* src/libvirt.c (virDomainSnapshotGetName)
(virDomainSnapshotGetDomain, virDomainSnapshotGetConnect): New
functions.
* src/libvirt_public.syms: Export them.
2011-09-08 13:15:13 +01:00
Osier Yang
c843478ec8 latency: Define new public API and structure 2011-09-06 12:02:51 +08:00
Eric Blake
e03a62b456 snapshot: add flag for requesting disk snapshot
Prior to this patch, <domainsnapshot>/<disks> was ignored.  This
changes it to be an error unless an explicit disk snapshot is
requested (a future patch may relax things if it turns out to
be useful to have a <disks> specification alongside a system
checkpoint).

* include/libvirt/libvirt.h.in
(VIR_DOMAIN_SNAPSHOT_CREATE_DISK_ONLY): New flag.
* src/libvirt.c (virDomainSnapshotCreateXML): Document it.
* src/esx/esx_driver.c (esxDomainSnapshotCreateXML): Disk
snapshots not supported yet.
* src/vbox/vbox_tmpl.c (vboxDomainSnapshotCreateXML): Likewise.
* src/qemu/qemu_driver.c (qemuDomainSnapshotCreateXML): Likewise.
2011-09-05 07:03:04 -06:00
Eric Blake
5b30b08d66 snapshot: support extra state in snapshots
In order to distinguish disk snapshots from system checkpoints, a
new state value that is only valid for snapshots is helpful.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_LAST): New placeholder.
* src/conf/domain_conf.h (virDomainSnapshotState): New enum mapping.
(VIR_DOMAIN_DISK_SNAPSHOT): New internal enum value.
* src/conf/domain_conf.c (virDomainState): Use placeholder.
(virDomainSnapshotState): Extend mapping by one for use in snapshot.
(virDomainSnapshotDefParseString, virDomainSnapshotDefFormat):
Handle new state.
(virDomainObjSetState, virDomainStateReasonToString)
(virDomainStateReasonFromString): Avoid compiler warnings.
* tools/virsh.c (vshDomainState, vshDomainStateReasonToString):
Likewise.
* src/libvirt_private.syms (domain_conf.h): Export new functions.
* docs/schemas/domainsnapshot.rng: Tighten state definition.
* docs/formatsnapshot.html.in: Document it.
* tests/domainsnapshotxml2xmlout/disk_snapshot.xml: New test.
2011-09-05 07:03:04 -06:00
Eric Blake
6f66423e17 snapshot: allow halting after snapshot
Since a snapshot is fully recoverable, it is useful to have a
snapshot as a means of hibernating a guest, then reverting to
the snapshot to wake the guest up.  This mode of usage is
similar to 'virsh save/virsh restore', except that virsh
save uses an external file while virsh snapshot keeps the
vm state internal to a qcow2 file.  However, it only works on
persistent domains.

In the usage pattern of snapshot/revert for hibernating a guest,
there is no need to keep the guest running between the two points
in time, especially since that would generate runtime state that
would just be discarded.  Add a flag to make it possible to
stop the domain after the snapshot has completed.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_SNAPSHOT_CREATE_HALT):
New flag.
* src/libvirt.c (virDomainSnapshotCreateXML): Document it.
* src/qemu/qemu_driver.c (qemuDomainSnapshotCreateXML)
(qemuDomainSnapshotCreateActive): Implement it.
2011-09-05 07:03:04 -06:00
Eric Blake
3d77d0a644 snapshot: introduce new deletion flag
Reverting to a state prior to an external snapshot risks
corrupting any other branches in the snapshot hierarchy that
were using the snapshot as a read-only backing file.  So
disk snapshot code will default to preventing reverting to
a snapshot that has any children, meaning that deleting just
the children of a snapshot becomes a useful operation in
preparing that snapshot for being a future reversion target.
The code for the new flag is simple - it's one less deletion,
plus a tweak to keep the current snapshot correct.

* include/libvirt/libvirt.h.in
(VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY): New flag.
* src/libvirt.c (virDomainSnapshotDelete): Document it, and
enforce mutual exclusion.
* src/qemu/qemu_driver.c (qemuDomainSnapshotDelete): Implement
it.
2011-09-05 07:03:04 -06:00
Eric Blake
282fe1f08c snapshot: prevent stranding snapshot data on domain destruction
Just as leaving managed save metadata behind can cause problems
when creating a new domain that happens to collide with the name
of the just-deleted domain, the same is true of leaving any
snapshot metadata behind.  For safety sake, extend the semantic
change of commit b26a9fa9 to also cover snapshot metadata as a
reason to reject undefining an inactive domain.  A future patch
will make sure that shutdown of a transient domain automatically
deletes snapshot metadata (whether by destroy, shutdown, or
guest-initiated action).  Management apps of transient domains
should take care to capture xml of snapshots, if it is necessary
to recreate the snapshot metadata on a later transient domain
with the same name and uuid.

This also documents a new flag that hypervisors can choose to
support as a shortcut for taking care of the metadata as part of
the undefine process; however, nontrivial driver support for these
flags will be deferred to future patches.

Note that ESX and VBox can never be transient; therefore, they
do not have to worry about automatic cleanup after shutdown
(the persistent domain still remains); likewise they never
store snapshot metadata, so the undefine flag is trivial.
The nontrivial work remaining is thus in the qemu driver.

* include/libvirt/libvirt.h.in
(VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA): New flag.
* src/libvirt.c (virDomainUndefine, virDomainUndefineFlags):
Document new limitations and flag.
* src/esx/esx_driver.c (esxDomainUndefineFlags): Trivial
implementation.
* src/vbox/vbox_tmpl.c (vboxDomainUndefineFlags): Likewise.
* src/qemu/qemu_driver.c (qemuDomainUndefineFlags): Enforce
the limitations.
2011-09-02 21:57:33 -06:00
Eric Blake
af65695af0 snapshot: allow recreation of metadata
The first two flags are essential for being able to replicate
snapshot hierarchies across multiple hosts, which will come in
handy for supervised migrations.  It also allows a management app
to take a snapshot of a transient domain, save the metadata, stop
the domain, recreate a new transient domain by the same name,
redefine the snapshot, then revert to it.

This is not quite as convenient as leaving the metadata behind
after a domain is no longer around, but doing that has a few
problems: 1. the libvirt API can only delete snapshot metadata
if there is a valid domain handle to use to get to that snapshot
object - if stale data is left behind without a domain, there is
no way to request that the data be cleaned up. 2. creating a new
domain with the same name but different uuid than the older
domain where a snapshot existed cannot use the older snapshot
data; this risks confusing libvirt, and forbidding the stale
data is similar to the recent patch to forbid stale managed save.

The first two flags might be useful on hypervisors with no metadata,
but only for modifying the notion of the current snapshot;
however, I don't know how to do that for ESX or VBox.

The third flag is a convenience option, to combine a creation with
a delete metadata into one step.  It is trivial for hypervisors
with no metadata.

The qemu changes will be involved enough to warrant a separate patch.

* include/libvirt/libvirt.h.in
(VIR_DOMAIN_SNAPSHOT_CREATE_REDEFINE)
(VIR_DOMAIN_SNAPSHOT_CREATE_CURRENT)
(VIR_DOMAIN_SNAPSHOT_CREATE_NO_METADATA): New flags.
* src/libvirt.c (virDomainSnapshotCreateXML): Document them, and
enforce mutual exclusion.
* src/esx/esx_driver.c (esxDomainSnapshotCreateXML): Trivial
implementation.
* src/vbox/vbox_tmpl.c (vboxDomainSnapshotCreateXML): Likewise.
* docs/formatsnapshot.html.in: Document re-creation.
2011-09-02 17:44:42 -06:00
Eric Blake
9f5e53e211 snapshot: identify which snapshots have metadata
To make it easier to know when undefine will fail because of existing
snapshot metadata, we need to know how many snapshots have metadata.

Also, it is handy to filter the list of snapshots to just those that
have no parents; document that flag now, but implement it in later patches.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_SNAPSHOT_LIST_ROOTS)
(VIR_DOMAIN_SNAPSHOT_LIST_METADATA): New flags.
* src/libvirt.c (virDomainSnapshotNum)
(virDomainSnapshotListNames): Document them.
* src/esx/esx_driver.c (esxDomainSnapshotNum)
(esxDomainSnapshotListNames): Implement trivial flag.
* src/vbox/vbox_tmpl.c (vboxDomainSnapshotNum)
(vboxDomainSnapshotListNames): Likewise.
* src/qemu/qemu_driver.c (qemuDomainSnapshotNum)
(qemuDomainSnapshotListNames): Likewise.
2011-09-02 16:58:36 -06:00
Eric Blake
795fe9b2fa snapshot: allow deletion of just snapshot metadata
A future patch will make it impossible to remove a domain if it
would leave behind any libvirt-tracked metadata about snapshots,
since stale metadata interferes with a new domain by the same name.
But requiring snaphot contents to be deleted before removing a
domain is harsh; with qemu, qemu-img can still make use of the
contents after the libvirt domain is gone.  Therefore, we need
an option to get rid of libvirt tracking information, but not
the actual contents.  For hypervisors that do not track any
metadata in libvirt, the implementation is trivial; all remaining
hypervisors (really, just qemu) will be dealt with separately.

* include/libvirt/libvirt.h.in
(VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY): New flag.
* src/libvirt.c (virDomainSnapshotDelete): Document it.
* src/esx/esx_driver.c (esxDomainSnapshotDelete): Trivially
supported when there is no libvirt metadata.
* src/vbox/vbox_tmpl.c (vboxDomainSnapshotDelete): Likewise.
2011-09-02 16:51:33 -06:00
Eric Blake
3cff66f487 snapshot: fine-tune ability to start paused
While it is nice that snapshots and saved images remember whether
the domain was running or paused, sometimes the restoration phase
wants to guarantee a particular state (paused to allow hot-plugging,
or running without needing to call resume).  This introduces new
flags to allow the control, and a later patch will implement the
flags for qemu.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_SAVE_RUNNING)
(VIR_DOMAIN_SAVE_PAUSED, VIR_DOMAIN_SNAPSHOT_REVERT_RUNNING)
(VIR_DOMAIN_SNAPSHOT_REVERT_PAUSED): New flags.
* src/libvirt.c (virDomainSaveFlags, virDomainRestoreFlags)
(virDomainManagedSave, virDomainSaveImageDefineXML)
(virDomainRevertToSnapshot): Document their use, and enforce
mutual exclusion.
2011-09-02 10:00:06 -06:00
Eric Blake
c1ff5dc63d snapshot: better events when starting paused
There are two classes of management apps that track events - one
that only cares about on/off (and only needs to track EVENT_STARTED
and EVENT_STOPPED), and one that cares about paused/running (also
tracks EVENT_SUSPENDED/EVENT_RESUMED).  To keep both classes happy,
any transition that can go from inactive to paused must emit two
back-to-back events - one for started and one for suspended (since
later resuming of the domain will only send RESUMED, but the first
class isn't tracking that).

This also fixes a bug where virDomainCreateWithFlags with the
VIR_DOMAIN_START_PAUSED flag failed to start paused when restoring
from a managed save image.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_EVENT_SUSPENDED_RESTORED)
(VIR_DOMAIN_EVENT_SUSPENDED_FROM_SNAPSHOT)
(VIR_DOMAIN_EVENT_RESUMED_FROM_SNAPSHOT): New sub-events.
* src/qemu/qemu_driver.c (qemuDomainRevertToSnapshot): Use them.
(qemuDomainSaveImageStartVM): Likewise, and add parameter.
(qemudDomainCreate, qemuDomainObjStart): Send suspended event when
starting paused.
(qemuDomainObjRestore): Add parameter.
(qemuDomainObjStart, qemuDomainRestoreFlags): Update callers.
* examples/domain-events/events-c/event-test.c
(eventDetailToString): Map new detail strings.
2011-09-02 10:00:06 -06:00
Osier Yang
27758859c7 storage: Add fs pool formatting
This patch adds the ability to make the filesystem for a filesystem
pool during a pool build.

The patch adds two new flags, no overwrite and overwrite, to control
when mkfs gets executed.  By default, the patch preserves the
current behavior, i.e., if no flags are specified, pool build on a
filesystem pool only makes the directory on which the filesystem
will be mounted.

If the no overwrite flag is specified, the target device is checked
to determine if a filesystem of the type specified in the pool is
present.  If a filesystem of that type is already present, mkfs is
not executed and the build call returns an error.  Otherwise, mkfs
is executed and any data present on the device is overwritten.

If the overwrite flag is specified, mkfs is always executed, and any
existing data on the target device is overwritten unconditionally.
2011-09-02 21:16:58 +08:00
Jim Fehlig
b12354befe Add public API for getting migration speed
Includes impl of python binding since the generator was not
able to cope.

Note: Requires gendispatch.pl patch from Matthias Bolte

https://www.redhat.com/archives/libvir-list/2011-August/msg01367.html
2011-09-01 11:26:21 -06:00
Eric Blake
27c8526053 start: allow discarding managed save
There have been several instances of people having problems with
a broken managed save file, and not aware that they could use
'virsh managedsave-remove dom' to fix things.  Making it possible
to do this as part of starting a domain makes the same functionality
easier to find, and one less API call.

* include/libvirt/libvirt.h.in (VIR_DOMAIN_START_FORCE_BOOT): New
flag.
* src/libvirt.c (virDomainCreateWithFlags): Document it.
* src/qemu/qemu_driver.c (qemuDomainObjStart): Alter signature.
(qemuAutostartDomain, qemuDomainStartWithFlags): Update callers.
* tools/virsh.c (cmdStart): Expose it in virsh.
* tools/virsh.pod (start): Document it.
2011-08-30 09:26:47 -06:00
Matthias Bolte
4d6e6f4aa9 hyperv: Add driver skeleton 2011-08-26 17:52:55 +02:00
Daniel P. Berrange
ce93f64b1e Fix keymap used to talk with QEMU
The QEMU 'sendkey' command expects keys to be encoded in the same
way as the RFB extended keycode set. Specifically it wants extended
keys to have the high bit of the first byte set, while the Linux
XT KBD driver codeset uses the low bit of the second byte. To deal
with this we introduce a new keymap 'RFB' and use that in the QEMU
driver

* include/libvirt/libvirt.h.in: Add VIR_KEYCODE_SET_RFB
* src/qemu/qemu_driver.c: Use RFB keycode set instead of XT KBD
* src/util/virkeycode-mapgen.py: Auto-generate the RFB keycode
  set from the XT KBD set
* src/util/virkeycode.c: Add RFB keycode entry to table. Add a
  verify check on cardinality of the codeOffset table
2011-08-26 14:18:57 +01:00
Peter Krempa
6c55124f37 storage: Directory shouldn't be listed as type 'file'
Fix internals of libvirt for new storage volume type.
Libvirt reported an invalid type of the volume.

BZ #727088
2011-08-11 13:34:26 -06:00
Eric Blake
ff81956ac6 maint: add missing copyright notices
I went with the shorter license notice used by src/libvirt.c,
rather than spelling out the full LGPLv2+ clause into each of
these files.

* configure.ac: Declare copyright.
* all Makefile.am: Likewise.
2011-07-28 15:01:17 -06:00
Jiri Denemark
d58e91a812 qemu: Migration job on source daemon
Make MIGRATION_OUT use the new helper methods.

This also introduces new protection to migration v3 process: the
migration job is held from Begin to Confirm to avoid changes to a domain
during migration (esp. between Begin and Perform phases). This change is
automatically applied to p2p and tunneled migrations. For normal
migration, this requires support from a client. In other words, if an
old (pre 0.9.4) client starts normal migration of a domain, the domain
will not be protected against changes between Begin and Perform steps.
2011-07-27 08:45:10 -06:00
Adam Litke
d489b04628 Asynchronous event for BlockJob completion
When an operation started by virDomainBlockPull completes (either with
success or with failure), raise an event to indicate the final status.
This API allow users to avoid polling on virDomainGetBlockJobInfo if
they would prefer to use an event mechanism.

* daemon/remote.c: Dispatch events to client
* include/libvirt/libvirt.h.in: Define event ID and callback signature
* src/conf/domain_event.c, src/conf/domain_event.h,
  src/libvirt_private.syms: Extend API to handle the new event
* src/qemu/qemu_driver.c: Connect to the QEMU monitor event
  for block_stream completion and emit a libvirt block pull event
* src/remote/remote_driver.c: Receive and dispatch events to application
* src/remote/remote_protocol.x: Wire protocol definition for the event
* src/remote_protocol-structs: structure definitions for protocol verification
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
  src/qemu/qemu_monitor_json.c: Watch for BLOCK_STREAM_COMPLETED event
  from QEMU monitor
2011-07-22 13:57:42 +08:00
Adam Litke
152e810388 Add new API virDomainBlockPull* to headers
Set up the types for the block pull functions and insert them into the
virDriver structure definition.  Symbols are exported in this patch to
prevent
documentation compile failures.

* include/libvirt/libvirt.h.in: new API
* src/driver.h: add the new entry to the driver structure
* python/generator.py: fix compiler errors, the actual python bindings
* are
  implemented later
* src/libvirt_public.syms: export symbols
* docs/apibuild.py: Extend 'unsigned long' parameter exception to this
* API
2011-07-22 13:18:06 +08:00
Eric Blake
d2a929d4b3 save: new API to manipulate save file images
Modifying the xml on either save or restore only gets you so
far - you have to remember to 'virsh dumpxml dom' just prior
to the 'virsh save' in order to have an xml file worth modifying
that won't be rejected due to abi breaks.  To make this more
powerful, we need a way to grab the xml embedded within a state
file, and from there, it's not much harder to also support
modifying a state file in-place.

Also, virDomainGetXMLDesc didn't document its flags.

* include/libvirt/libvirt.h.in (virDomainSaveImageGetXMLDesc)
(virDomainSaveImageDefineXML): New prototypes.
* src/libvirt.c (virDomainSaveImageGetXMLDesc)
(virDomainSaveImageDefineXML): New API.
* src/libvirt_public.syms: Export them.
* src/driver.h (virDrvDomainSaveImageGetXMLDesc)
(virDrvDomainSaveImgeDefineXML): New driver callbacks.
2011-07-21 17:11:07 -06:00
Eric Blake
1700345708 error: add new error type for reflecting partial API support
VIR_ERR_INVALID_ARG implies that an argument cannot possibly
be correct, given the current state of the API.
VIR_ERR_CONFIG_UNSUPPORTED implies that a configuration is
wrong, but arguments aren't configuration.
VIR_ERR_NO_SUPPORT implies that a function is completely
unimplemented.

But in the case of a function that is partially implemented,
yet the full power of the API is not available for that
driver, none of the above messages make sense.  Hence a new
error message, implying that the argument is known to comply
with the current state of the API, and that while the driver
supports aspects of the function, it does not support that
particular use of the argument.

A good use case for this is a driver that supports
virDomainSaveFlags, but not the dxml argument of that API.

It might be feasible to also use this new error for all functions
that check flags, and which accept fewer flags than what is possible
in the public API.  But doing so would get complicated, since
neither libvirt.c nor the remote driver may do flag filtering,
and every other driver would have to do a two-part check, first
using virCheckFlags on all public flags (which gives
VIR_ERR_INVALID_ARG for an impossible flag), followed by a
particular mask check for VIR_ERR_ARGUMENT_UNSUPPORTED (for a
possible public flag but unsupported by this driver).

* include/libvirt/virterror.h (VIR_ERR_ARGUMENT_UNSUPPORTED): New
error.
* src/util/virterror.c (virErrorMsg): Give it a message.
Suggested by Daniel P. Berrange.
2011-07-21 16:04:56 -06:00
Michal Privoznik
080bc4ea02 destroy: Define new public API virDomainDestroyFlags
This introduces new API virDomainDestroyFlags to allow
domain destroying with flags, as the existing API virDomainDestroy
misses flags.

The set of flags is defined in virDomainDestroyFlagsValues enum,
which is currently commented, because it is empty.

Calling this API with no flags set (@flags == 0) is equivalent calling
virDomainDestroy.
2011-07-21 20:38:35 +02:00
Eric Blake
ad0b912384 save: new public API to bypass file system cache on save/restore
In order to choose whether to use O_DIRECT when saving a domain image
to a file, we need a new flag.  But virDomainSave was implemented
before our policy of all new APIs having a flag argument.  Likewise
for virDomainRestore when restoring from a file.

The new flag name is chosen as CACHE_BYPASS so as not to preclude
a future solution that uses posix_fadvise once the Linux kernel has
a smarter implementation of that interface.

* include/libvirt/libvirt.h.in (virDomainCreateFlags)
(virDomainCoreDumpFlags): Add a flag.
(virDomainSaveFlags, virDomainRestoreFlags): New prototypes.
* src/libvirt.c (virDomainSaveFlags, virDomainRestoreFlags): New API.
* src/libvirt_public.syms: Export them.
* src/driver.h (virDrvDomainSaveFlags, virDrvDomainRestoreFlags):
New driver callbacks.
2011-07-21 10:34:51 -06:00
Lai Jiangshan
0bbf87e91e util: add virtkeycode module
Add virtkey lib for usage-improvment and keycode translating.
Add 4 internal API for the aim

const char *virKeycodeSetTypeToString(int codeset);
int virKeycodeSetTypeFromString(const char *name);
int virKeycodeValueFromString(virKeycodeSet codeset, const char *keyname);
int virKeycodeValueTranslate(virKeycodeSet from_codeset,
                             virKeycodeSet to_offset,
                             int key_value);

* include/libvirt/libvirt.h.in: extend virKeycodeSet enum
* src/Makefile.am: add new virtkeycode module and rule to generate
  virkeymaps.h
* src/util/virkeycode.c src/util/virkeycode.h: new module
* src/util/virkeycode-mapgen.py: python generator for virkeymaps.h
  out of keymaps.csv
* src/libvirt_private.syms: extend private symbols for new module
* .gitignore: add generated virkeymaps.h
2011-07-21 15:57:47 +08:00
Osier Yang
b26a9fa9c2 undefine: Define the new API
This introduces a new API virDomainUndefineFlags to control the
domain undefine process, as the existing API virDomainUndefine
doesn't support flags.

Currently only flag VIR_DOMAIN_UNDEFINE_MANAGED_SAVE is supported.
If the domain has a managed save image, including
VIR_DOMAIN_UNDEFINE_MANAGED_SAVE in @flags will also remove that
file, and omitting the flag will cause undefine process to fail.

This patch also changes the behavior of virDomainUndefine, if the
domain has a managed save image, the undefine will be refused.
2011-07-20 10:59:54 +08:00
Taku Izumi
ceb0ed5d97 setvcpus: extend virDomainSetVcpusFlags API to support current flag
This patch extends virDomainSetVcpusFlags API to support
VIR_DOMAIN_AFFECT_CURRENT flag.

Now because most APIs accept VIR_DOMAIN_AFFECT_CURRENT flags,
virDomainSetVcpusFlags API should also do.

Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com>
2011-07-15 08:19:24 -06:00
Daniel P. Berrange
639f841346 Define a QEMU specific API to attach to a running QEMU process
Introduce a new API in libvirt-qemu.so

 virDomainPtr virDomainQemuAttach(virConnectPtr domain,
                                  unsigned long long pid,
                                  unsigned int flags);

This allows libvirtd to attach to an existing, externally
launched QEMU process. This is useful for QEMU developers who
prefer to launch QEMU themselves for debugging/devel reasons,
but still want the benefit of libvirt based tools like
virt-top, virt-viewer, etc

* include/libvirt/libvirt-qemu.h: Define virDomainQemuAttach
* src/driver.h, src/libvirt-qemu.c, src/libvirt_qemu.syms:
  Driver glue for virDomainQemuAttach
2011-07-12 15:39:03 +01:00
Eric Blake
18d561c7a4 public API: prefer unsigned int for flags
Most APIs use 'unsigned int flags'; but a few stragglers were using
a signed value.  In particular, the vir*GetXMLDesc APIs were
split-brain, with inconsistent choice of types.  Although it is
an API break to use 'int' instead of 'unsigned int', it is ABI
compatible (pre-compiled apps will have no difference in behavior),
and generally apps can be recompiled without any issue (only rare
apps that compiled with extremely high warning levels, or which
pass libvirt API around as typed function pointers, would have to
make any code changes to deal with the change).

The migrate APIs use 'unsigned long flags', which can't be changed,
due to ABI constraints.

This patch intentionally touches only the public API, to prove the
claim that most existing code (including driver callbacks and virsh)
still compiles just fine in spite of the type change.

* include/libvirt/libvirt.h.in (virConnectOpenAuth)
(virDomainCoreDump, virDomainGetXMLDesc, virNetworkGetXMLDesc)
(virNWFilterGetXMLDesc): Use unsigned int for flags.
(virDomainHasCurrentSnapshot): Use consistent spelling.
* src/libvirt.c (virConnectOpenAuth, virDomainCoreDump)
(virDomainGetXMLDesc, virNetworkGetXMLDesc)
(virNWFilterGetXMLDesc, do_open): Update accordingly.
2011-07-07 14:15:32 -06:00