Commit Graph

16003 Commits

Author SHA1 Message Date
Eric Blake
43b17dd444 qemu: allow filtering events by regex
When listening for a subset of monitor events, it can be tedious
to register for each event name in series; nicer is to register
for multiple events in one go.  Implement a flag to use regex
interpretation of the event filter.

While at it, prove how much I hate the shift key, by adding a
way to filter for 'shutdown' instead of 'SHUTDOWN'. :)

* include/libvirt/libvirt-qemu.h
(virConnectDomainQemuMonitorEventRegisterFlags): New enum.
* src/libvirt-qemu.c (virConnectDomainQemuMonitorEventRegister):
Document flags.
* tools/virsh-domain.c (cmdQemuMonitorEvent): Expose them.
* tools/virsh.pod (qemu-monitor-event): Document this.
* src/conf/domain_event.c
(virDomainQemuMonitorEventStateRegisterID): Add flags.
(virDomainQemuMonitorEventFilter): Handle regex, and optimize
client side.
(virDomainQemuMonitorEventCleanup): Clean up regex.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-03-20 11:25:37 -06:00
Eric Blake
d0ba8dd764 qemu: enable monitor event filtering by name
Filtering monitor events by name requires tracking the name for
the duration of the filtering.  In order to free the name, I
found it easiest to just piggyback on the user's freecb function,
which gets called when the event is deregistered.

For events without a name filter, we have the design of multiple
client registrations sharing a common server registration, because
the server side uses the same callback function and we reject
duplicate use of the same function.  But with events in the mix,
we want to be able to allow the same function pointer to be used
with more than one event name.  The solution is to tweak the
duplicate detection code to only act when there is no additional
filtering; if name filtering is in use, there is exactly one
client registration per server registration.  Yes, this means
that there is no longer a bound on the number of server
registrations possible, so a malicious client could repeatedly
register for the same name event to exhaust server memory.  On
the other hand, we already restricted monitor events to require
write access (compared to normal events only needing read access),
and separated it into the intentionally unsupported
libvirt-qemu.so, with documentation that using this function is
for debug purposes only; so it is not a security risk worth
worrying about a client trying to abuse multiple registrations.

* src/conf/domain_event.c (virDomainQemuMonitorEventData): New
struct.
(virDomainQemuMonitorEventFilter)
(virDomainQemuMonitorEventCleanup): New functions.
(virDomainQemuMonitorEventDispatchFunc)
(virDomainQemuMonitorEventStateRegisterID): Use new struct.
* src/conf/object_event.c (virObjectEventCallbackListCount)
(virObjectEventCallbackListAddID)
(virObjectEventCallbackListRemoveID)
(virObjectEventCallbackListMarkDeleteID): Drop duplicate detection
when filtering is in effect.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-03-20 11:25:37 -06:00
Eric Blake
3566599a2f qemu: enable monitor event reporting
Wire up all the pieces to send arbitrary qemu events to a
client using libvirt-qemu.so.  If the extra bookkeeping of
generating event objects even when no one is listening turns
out to be noticeable, we can try to further optimize things
by adding a counter for how many connections are using events,
and only dump events when the counter is non-zero; but for
now, I didn't think it was worth the code complexity.

* src/qemu/qemu_driver.c
(qemuConnectDomainQemuMonitorEventRegister)
(qemuConnectDomainQemuMonitorEventDeregister): New functions.
* src/qemu/qemu_monitor.h (qemuMonitorEmitEvent): New prototype.
(qemuMonitorDomainEventCallback): New typedef.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONIOProcessEvent):
Report events.
* src/qemu/qemu_monitor.c (qemuMonitorEmitEvent): New function, to
pass events through.
* src/qemu/qemu_process.c (qemuProcessHandleEvent): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-03-20 11:25:37 -06:00
Eric Blake
e7708a1c47 qemu: wire up RPC for qemu monitor events
These are the first async events in the qemu protocol, so this
patch looks rather big compared to most RPC additions.  However,
a large majority of this patch is just mechanical copy-and-paste
from recently-added network events.  It didn't help that this
is also the first virConnect rather than virDomain prefix
associated with a qemu-specific API.

* src/remote/qemu_protocol.x (qemu_*_domain_monitor_event_*): New
structs and RPC messages.
* src/rpc/gendispatch.pl: Adjust naming conventions.
* daemon/libvirtd.h (daemonClientPrivate): Track qemu events.
* daemon/remote.c (remoteClientFreeFunc): Likewise.
(remoteRelayDomainQemuMonitorEvent)
(qemuDispatchConnectDomainMonitorEventRegister)
(qemuDispatchConnectDomainMonitorEventDeregister): New functions.
* src/remote/remote_driver.c (qemuEvents): Handle qemu events.
(doRemoteOpen): Register for events.
(remoteNetworkBuildEventLifecycle)
(remoteConnectDomainQemuMonitorEventRegister)
(remoteConnectDomainQemuMonitorEventDeregister): New functions.
* src/qemu_protocol-structs: Regenerate.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-03-20 11:25:37 -06:00
Eric Blake
8059afca62 qemu: create object for qemu monitor events
Create qemu monitor events as a distinct class to normal domain
events, because they will be filtered differently.  For ease of
review, the logic for filtering by event name is saved for a later
patch.

* src/conf/domain_event.c (virDomainQemuMonitorEventClass): New
class.
(virDomainEventsOnceInit): Register it.
(virDomainQemuMonitorEventDispose, virDomainQemuMonitorEventNew)
(virDomainQemuMonitorEventDispatchFunc)
(virDomainQemuMonitorEventStateRegisterID): New functions.
* src/conf/domain_event.h (virDomainQemuMonitorEventNew)
(virDomainQemuMonitorEventStateRegisterID): New prototypes.
* src/libvirt_private.syms (conf/domain_conf.h): Export them.
2014-03-20 11:25:37 -06:00
Eric Blake
88996de1c3 qemu: virsh wrapper for qemu events
Any new API deserves a good virsh wrapper :)

    qemu-monitor-event [<domain>] [<event>] [--pretty] [--loop] [--timeout <number>]

Very similar to the previous work on 'virsh event'.  For an
example session:

$ virsh -c qemu:///system qemu-monitor-event --event SHUTDOWN&
$ virsh -c qemu:///system start f18-live
Domain f18-live started

$ virsh -c qemu:///system destroy f18-live
Domain f18-live destroyed

event SHUTDOWN at 1391212552.026544 for domain f18-live: (null)
events received: 1

[1]+  Done                    virsh -c qemu:///system qemu-monitor-event --event SHUTDOWN
$

* tools/virsh-domain.c (cmdQemuMonitorEvent): New command.
* tools/virsh.pod (qemu-monitor-event): Document it.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-03-20 11:25:37 -06:00
Eric Blake
2629520342 qemu: new API for tracking arbitrary monitor events
Several times in the past, qemu has implemented a new event,
but libvirt has not yet caught up to reporting that event to
the user applications.  While it is possible to track libvirt
logs to see that an unknown event was received and ignored,
it would be nicer to copy what 'virsh qemu-monitor-command'
does, and expose this information to the end developer as
one of our unsupported qemu-specific commands.

If you find yourself needing to use this API for more than
just development purposes, please ask on the libvirt list
for a supported counterpart event to be added in libvirt.so.

While the supported virConnectDomainEventRegisterAny() API
takes an id which determines the signature of the callback,
this version takes a string filter and always uses the same
signature.  Furthermore, I chose to expose this as a new API
instead of trying to add a new eventID at the top level, in
part because the generic option lacks event name filtering,
and in part because the normal domain event namespace should
not be polluted by a qemu-only event.  I also added a flags
argument; unused for now, but we might decide to use it to
allow a user to request event names by glob or regex instead
of literal match.

This API intentionally requires full write access (while
normal event registration is allowed on read-only clients);
this is in part due to the fact that it should only be used
by debugging situations, and in part because the design of
per-event filtering in later patches ended up allowing for
duplicate registrations that could potentially be abused to
exhaust server memory - requiring write privileges means
that such abuse will not serve as a denial of service attack
against users with higher privileges.

* include/libvirt/libvirt-qemu.h
(virConnectDomainQemuMonitorEventCallback)
(virConnectDomainQemuMonitorEventRegister)
(virConnectDomainQemuMonitorEventDeregister): New prototypes.
* src/libvirt-qemu.c (virConnectDomainQemuMonitorEventRegister)
(virConnectDomainQemuMonitorEventDeregister): New functions.
* src/libvirt_qemu.syms (LIBVIRT_QEMU_1.2.1): Export them.
* src/driver.h (virDrvConnectDomainQemuMonitorEventRegister)
(virDrvConnectDomainQemuMonitorEventDeregister): New callbacks.

Signed-off-by: Eric Blake <eblake@redhat.com>
2014-03-20 11:25:37 -06:00
Ján Tomko
072357b0c6 Fix indentation in iscsi storage backend 2014-03-20 18:13:58 +01:00
Ján Tomko
ee640f444b Ignore missing files on pool refresh
If we cannot stat/open a file on pool refresh, returning -1 aborts
the refresh and the pool is undefined.

Only treat missing files as fatal unless VolOpenCheckMode is called
with the VIR_STORAGE_VOL_OPEN_ERROR flag. If this flag is missing
(when it's called from virStorageBackendProbeTarget in
virStorageBackendFileSystemRefresh), only emit a warning and return
-2 to let the caller skip over the file.

https://bugzilla.redhat.com/show_bug.cgi?id=977706
2014-03-20 18:13:58 +01:00
Ján Tomko
0edfc9ef63 Ignore char devices in storage pools by default
Without this, using /dev/mapper as a directory pool
fails in virStorageBackendUpdateVolTargetInfoFD:
cannot seek to end of file '/dev/mapper/control': Illegal seek

Skip over character devices by default.

https://bugzilla.redhat.com/show_bug.cgi?id=710866
2014-03-20 18:13:57 +01:00
Ján Tomko
444122d9b8 Add test for virISCSIScanTargets 2014-03-20 18:10:50 +01:00
Ján Tomko
c22e989df6 Add test for virISCSIGetSession
Parse iscsiadm output with and without the recently introduced
flashnode info. [1]

This should check that commits like 57e17a7 (fixing [2]) do
not break iscsiadm output parsing.

[1] https://github.com/mikechristie/open-iscsi/commit/181af9a
[2] https://bugzilla.redhat.com/show_bug.cgi?id=1067173
2014-03-20 18:10:34 +01:00
Ján Tomko
5e1d5dded2 Move functions using iscsiadm to viriscsi.c
Remove the 'StorageBackend' from names of the functions and fix
indentation.
2014-03-20 18:04:50 +01:00
Ján Tomko
55074071ec Remove storage pool from the arguments of a few functions
virStorageBackendISCSISession only needs the path of the source
device and virStorageBackendISCSIRescanLUNs doesn't need the pool
at all.

This will allow the functions to be moved to src/util.
2014-03-20 18:04:50 +01:00
Ján Tomko
2053427552 Don't create iscsiadm command line in ISCSIPool{Start,Stop}
Create ISCSIConnection{Login,Logout} wrappers for that.
2014-03-20 18:04:50 +01:00
Ján Tomko
7dbbad35f2 Switch virCommandRunRegex to use virStringSplit
Instead of running the command asynchronously and reading the output
via fgets, let virCommand collect the output and split it with
virStringSplit.
2014-03-20 18:04:50 +01:00
Ján Tomko
f2cc42868e Move virStorageBackendRun to vircommand
The only storage-specific parameter is the pool object, which
is only used for passing to the callback function.
2014-03-20 18:04:50 +01:00
Ján Tomko
845255a430 Sort includes in storage_backend_iscsi.c 2014-03-20 18:04:49 +01:00
Martin Kletzander
9b7ac663ee Require K&R styled curly braces around function bodies
Although not explicitly requested, we are using K&R (or Kernel)
indentation for curly braces around functions in HACKING file and most
of the code.  Using grep -P, this patch add the syntax-check rule for
it (while skipping all the false positives with foreach constructs).

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:27:17 +01:00
Martin Kletzander
95aed7febc Use K&R style for curly braces in remaining files
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:27:17 +01:00
Martin Kletzander
cd4da711a9 Use K&R style for curly braces in src/vbox/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:39 +01:00
Martin Kletzander
5d734987fd Use K&R style for curly braces in src/network/bridge_driver.c
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:39 +01:00
Martin Kletzander
50ca2cb043 Use K&R style for curly braces in src/lxc/lxc_driver.c
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:39 +01:00
Martin Kletzander
969c4f0494 Use K&R style for curly braces in src/uml/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:39 +01:00
Martin Kletzander
a9ed417f3a Use K&R style for curly braces in src/test/test_driver.c
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:39 +01:00
Martin Kletzander
58d467116b Use K&R style for curly braces in src/nwfilter/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:38 +01:00
Martin Kletzander
f84e17997b Use K&R style for curly braces in src/openvz/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:38 +01:00
Martin Kletzander
b6d6635ead Use K&R style for curly braces in src/storage/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:38 +01:00
Martin Kletzander
b1d5f6c6cb Use K&R style for curly braces in src/qemu/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:38 +01:00
Martin Kletzander
9c487f6505 Use K&R style for curly braces in src/conf/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:38 +01:00
Martin Kletzander
7fa91525bd Use K&R style for curly braces in src/rpc/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:38 +01:00
Martin Kletzander
daedff47ae Use K&R style for curly braces in src/util/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:16:18 +01:00
Martin Kletzander
6e28dee258 Use K&R style for curly braces in src/xen*/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:06:38 +01:00
Martin Kletzander
f19b3a5f0c Use K&R style for curly braces in tests/
Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-03-20 17:06:38 +01:00
Scott Sullivan
0099a4ae2b is_selinux_enabled() returns -1 on error, account for this.
Per the documentation, is_selinux_enabled() returns -1 on error.
Account for this. Previously when -1 was being returned the condition
would still be true. I was noticing this because on my system that has
selinux disabled I was getting this in the libvirt.log every 5
seconds:

error : virIdentityGetSystem:173 : Unable to lookup SELinux process context: Invalid argument

With this patch applied, I no longer get these messages every 5
seconds. I am submitting this in case its deemed useful for inclusion.
Anyone have any comments on this change? This is a patch off current
master.

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-03-20 16:26:55 +01:00
Wojciech Macek
bc93c34ef6 bhyve: host API support
New functionalities:
- connectGetMaxVcpus - on bhyve hardcode this value to 16
- nodeGetFreeMemory - do not use physmem_get on FreeBSD, since
                      it might get wrong value on systems with
                      more than 100GB of RAM
- nodeGetCPUMap - wrapper only for mapping function, currently not
                  supported by FreeBSD
- nodeSet/GetMemoryParameters - wrapper only for future improvements,
                                currently not supported by FreeBSD
2014-03-20 18:22:49 +04:00
Daniel P. Berrange
ba08c5932e Fix unitialized data in virSocketAddrMask
The virSocketAddrMask method did not initialize all fields
in the sockaddr_in6 struct. In paticular the 'sin6_scope_id'
field could contain random garbage, which would in turn
affect the result of any later virSocketAddrFormat calls.
This led to ip6tables rules in the FORWARD chain which
matched on random garbage sin6_scope_id. Fortunately these
were ACCEPT rules, so the impact was merely that desired
traffic was blocked, rather than undesired traffic allowed.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2014-03-20 12:15:00 +00:00
Ján Tomko
ba354048b8 Fix virQEMUCapsLoadCache leaks
Valgrind reported leaking of maxCpus and arch strings from
virXPathString, as well as the leak of the machineMaxCpus array.

Don't use 'str' for the strings we don't want to free, to allow
freeing of 'str' in the cleanup label and free machineMaxCpus
in virCapsReset too.
2014-03-20 11:05:42 +01:00
Jiri Denemark
be8701d76c daemon: Enhance documentation for changing NOFILE limit
Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
2014-03-20 10:55:44 +01:00
Jim Fehlig
0a840e23c2 libxl: move domain event handler to libxl_domain
Move the domain event handler and shutdown thread out of the main
driver module and into libxl_domain module

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:47:17 -06:00
Jim Fehlig
7fb36c7b8d libxl: include a pointer to the driver in libxlDomainObjPrivate
Include a pointer to the libxl driver in libxlDomainObjPrivate
object so it can be used in the domain event handler and
shutdown thread.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:47:11 -06:00
Jim Fehlig
3182448f4c libxl: move libxlVmStart to libxl_domain
Move libxlVmStart from libxl_driver to libxl_domain for
use by other libxl modules.  For consistency, rename to
libxlDomainStart.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:47:09 -06:00
Jim Fehlig
024e4bb400 libxl: move libxlFreeMem to libxl_domain
Move libxlFreeMem from libxl_driver to libxl_domain for
use by other libxl modules.  For consistency, rename to
libxlDomainFreeMem.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:47:05 -06:00
Jim Fehlig
e394d39ed8 libxl: move libxlDomainSetVcpuAffinities to libxl_domain
Move libxlDomainSetVcpuAffinities from libxl_driver to libxl_domain
for use by other libxl modules.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:46:59 -06:00
Jim Fehlig
d8d713234e libxl: move libxlDoNodeGetInfo to libxl_conf
Move libxlDoNodeGetInfo from libxl_driver to libxl_conf
for use by other libxl modules.  For consistency, rename to
libxlDriverNodeGetInfo.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:46:55 -06:00
Jim Fehlig
f1d1650176 libxl: move libxlDomainAutoCoreDump to libxl_domain
Move libxlDomainAutoCoreDump from libxl_driver to libxl_domain
for use by other libxl modules.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:46:51 -06:00
Jim Fehlig
ea88cc7683 libxl: move libxlDomEventsRegister to libxl_domain
Move libxlDomEventsRegister from libxl_driver to libxl_domain for
use by other libxl modules.  For consistency, rename to
libxlDomainEventsRegister.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:46:47 -06:00
Jim Fehlig
a0407e63f8 libxl: move libxlVmCleanup{,Job} to libxl_domain
Move libxlVmCleanup and libxlVmCleanupJob from libxl_driver to
libxl_domain for use by other libxl modules.  For consistency,
rename to libxlDomainCleanup and libxlDomainCleanupJob.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:46:43 -06:00
Jim Fehlig
7295941dea libxl: move libxlSaveImageOpen to libxl_domain
Move libxlSaveImageOpen from libxl_driver to libxl_domain for
use by other libxl modules.  For consistency, rename to
libxlDomainSaveImageOpen.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:46:40 -06:00
Jim Fehlig
11e97958ce libxl: move libxlDomainManagedSavePath to libxl_domain
Move libxlDomainManagedSavePath from libxl_driver to libxl_domain
for use by other libxl modules.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2014-03-19 14:46:36 -06:00