Running virsh while having /var/lib/libvirt/libvirt-guests file open
makes SELinux emit messages about preventing virsh from reading that
file. Since virsh doesn't really want to read anything, it's better to
run it with /dev/null on stdin to prevent those messages.
Justin Clift reported a problem with adding virStoragePoolIsPersistent
to virsh's pool-info command, resulting in a strange problem. Here's
an example:
virsh # pool-create-as images_dir3 dir - - - - "/home/images2"
Pool images_dir3 created
virsh # pool-info images_dir3
Name: images_dir3
UUID: 90301885-94eb-4ca7-14c2-f30b25a29a36
State: running
Capacity: 395.20 GB
Allocation: 30.88 GB
Available: 364.33 GB
virsh # pool-destroy images_dir3
Pool images_dir3 destroyed
At this point the images_dir3 pool should be gone (because it was
transient) and we should be able to create a new pool with the same name:
virsh # pool-create-as images_dir3 dir - - - - "/home/images2"
Pool images_dir3 created
virsh # pool-info images_dir3
Name: images_dir3
UUID: 90301885-94eb-4ca7-14c2-f30b25a29a36
error: Storage pool not found
The new pool got the same UUID as the first one, but we didn't specify
one. libvirt should have picked a random UUID, but it didn't.
It turned out that virStoragePoolIsPersistent leaks a reference to the
storage pool object (actually remoteDispatchStoragePoolIsPersistent does).
As a result, pool-destroy doesn't remove the virStoragePool for the
"images_dir3" pool from the virConnectPtr's storagePools hash on libvirtd's
side. Then the second pool-create-as get's the stale virStoragePool object
associated with the "images_dir3" name. But this object has the old UUID.
This commit ensures that all get_nonnull_* and make_nonnull_* calls for
libvirt objects are matched properly with vir*Free calls. This fixes the
reference leaks and the reported problem.
All remoteDispatch*IsActive and remoteDispatch*IsPersistent functions were
affected. But also remoteDispatchDomainMigrateFinish2 was affected in the
success path. I wonder why that didn't surface earlier. Probably because
domainMigrateFinish2 is executed on the destination host and in the common
case this connection is opened especially for the migration and gets closed
after the migration is done. So there was no chance to run into a problem
because of the leaked reference.
Define the wire format for the new virDomainCreateWithFlags
API, and implement client and server side of marshaling code.
* daemon/remote.c (remoteDispatchDomainCreateWithFlags): Add
server side dispatch for virDomainCreateWithFlags.
* src/remote/remote_driver.c (remoteDomainCreateWithFlags)
(remote_driver): Client side serialization.
* src/remote/remote_protocol.x
(remote_domain_create_with_flags_args)
(remote_domain_create_with_flags_ret)
(REMOTE_PROC_DOMAIN_CREATE_WITH_FLAGS): Define wire format.
* daemon/remote_dispatch_args.h: Regenerate.
* daemon/remote_dispatch_prototypes.h: Likewise.
* daemon/remote_dispatch_table.h: Likewise.
* src/remote/remote_protocol.c: Likewise.
* src/remote/remote_protocol.h: Likewise.
* src/remote_protocol-structs: Likewise.
When libvirtd exits it is leaving UNIX domain sockets on
the filesystem. These need to be removed.
The qemudInitPaths() method has signficant code churn to
switch from using a pre-allocated buffer on the stack, to
dynamically allocating on the heap.
* daemon/libvirtd.c, daemon/libvirtd.h: Store a reference
to the UNIX domain socket path and unlink it on shutdown
Otherwise, VPATH builds fail with:
make[1]: *** No rule to make target `libvirt-guests.init', needed by `all'.
Regression introduced in commit 482e08a9.
* daemon/Makefile.am (%.init): Look in correct place for
config.status.
Firstly, the init script has to touch its file under /var/lock/subsys
when started, otherwise the system would think it's not running and
won't stop it during shutdown.
Secondly, for some reason there is a policy to automatically enable
init scripts when they are installed, so let the specfile do this. We
also need to start the init script to ensure it will be stopped during
the first shutdown after installing the package.
Also $LISTFILE should be enclosed by quotes everywhere as suggested by
Eric.
Allow for a host UUID in the capabilities XML. Local drivers
will initialize this from the SMBIOS data. If a sanity check
shows SMBIOS uuid is invalid, allow an override from the
libvirtd.conf configuration file
* daemon/libvirtd.c, daemon/libvirtd.conf: Support a host_uuid
configuration option
* docs/schemas/capability.rng: Add optional host uuid field
* src/conf/capabilities.c, src/conf/capabilities.h: Include
host UUID in XML
* src/libvirt_private.syms: Export new uuid.h functions
* src/lxc/lxc_conf.c, src/qemu/qemu_driver.c,
src/uml/uml_conf.c: Set host UUID in capabilities
* src/util/uuid.c, src/util/uuid.h: Support for host UUIDs
* src/node_device/node_device_udev.c: Use the host UUID functions
* tests/confdata/libvirtd.conf, tests/confdata/libvirtd.out: Add
new host_uuid config option to test
Some diagnostics had a hard-coded "libvirtd: " prefix, some used
"error: " and some used "argv[0]: ". Always use "argv[0]: ".
* daemon/libvirtd.c (argv0): New global.
(main): Set it.
(version, usage): Remove argv0 parameter. Use global; update callers.
(daemonForkIntoBackground): Use argv0:, not error:.
(qemudWritePidFile): Start each diagnostic with argv0:.
Suggested by Eric Blake.
* daemon/libvirtd.c (daemonForkIntoBackground, main): Mark strings
for translation.
(usage): Rework --help so that it is translatable, replacing
each embedded, configuration-dependent, macro with an `%s'.
libvirtd: don't ignore virInitialize failure
* daemon/libvirtd.c (main): Diagnose virInitialize failure
and exit nonzero.
/etc/sysconfig/libvirtd has a few environment variables for configuring
libvirt SDL audio. The libvirtd process doesn't see these, however, because
they are never exported. Let's export the variables after sourcing the
sysconfig script.
There is another problem here that the commented out values in the
sysconfig script are not neccessarily the actual defaults, we are qemus
mercy here. Not sure how to solve that.
Example output during shutdown:
Running guests on default URI: console, rhel6-1, rhel5-64
Running guests on lxc:/// URI: lxc-shell
Running guests on xen:/// URI: error: no hypervisor driver available for xen:///
error: failed to connect to the hypervisor
Running guests on vbox+tcp://orkuz/system URI: no running guests.
Suspending guests on default URI...
Suspending console: done
Suspending rhel6-1: done
Suspending rhel5-64: done
Suspending guests on lxc:/// URI...
Suspending lxc-shell: error: Failed to save domain 9cba8bfb-56f4-6589-2d12-8a58c886dd3b state
error: this function is not supported by the hypervisor: virDomainManagedSave
Note, the "Suspending $guest: " shows progress during the suspend phase
if domjobinfo gives meaningful output.
Example output during boot:
Resuming guests on default URI...
Resuming guest rhel6-1: done
Resuming guest rhel5-64: done
Resuming guest console: done
Resuming guests on lxc:/// URI...
Resuming guest lxc-shell: already active
Configuration used for generating the examples above:
URIS='default lxc:/// xen:/// vbox+tcp://orkuz/system'
The script uses /var/lib/libvirt/libvirt-guests files to note all active
guest it should try to resume on next boot. It's content looks like:
default 7f8b9d93-30e1-f0b9-47a7-cb408482654b 085b4c95-5da2-e8e1-712f-6ea6a4156af2 fb4d8360-5305-df3a-2da1-07d682891b8c
lxc:/// 9cba8bfb-56f4-6589-2d12-8a58c886dd3b
These files may be useful for anyone making modifications to
source files in a tarball distribution.
* src/Makefile.am (EXTRA_DIST): Add THREADS.txt.
* daemon/Makefile.am (EXTRA_DIST): Add THREADING.txt.
Approximately 60 messages were marked. Since these diagnostics are
intended solely for developers and maintainers, encouraging translation
is deemed to be counterproductive:
http://thread.gmane.org/gmane.comp.emulators.libvirt/25050/focus=25052
Run this command:
git grep -l VIR_WARN|xargs perl -pi -e \
's/(VIR_WARN0?)\s*\(_\((".*?")\)/$1($2/'
This introduces a new event type
VIR_DOMAIN_EVENT_ID_IO_ERROR_REASON
This event is the same as the previous VIR_DOMAIN_ID_IO_ERROR
event, but also includes a string describing the cause of
the event.
Thus there is a new callback definition for this event type
typedef void (*virConnectDomainEventIOErrorReasonCallback)(virConnectPtr conn,
virDomainPtr dom,
const char *srcPath,
const char *devAlias,
int action,
const char *reason,
void *opaque);
This is currently wired up to the QEMU block IO error events
* daemon/remote.c: Dispatch IO error events to client
* examples/domain-events/events-c/event-test.c: Watch for
IO error events
* include/libvirt/libvirt.h.in: Define new IO error event ID
and callback signature
* src/conf/domain_event.c, src/conf/domain_event.h,
src/libvirt_private.syms: Extend API to handle IO error events
* src/qemu/qemu_driver.c: Connect to the QEMU monitor event
for block IO errors and emit a libvirt IO error event
* src/remote/remote_driver.c: Receive and dispatch IO error
events to application
* src/remote/remote_protocol.x: Wire protocol definition for
IO error events
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
src/qemu/qemu_monitor_json.c: Watch for BLOCK_IO_ERROR event
from QEMU monitor
* daemon/remote.c: Server side dispatcher
* daemon/remote_dispatch_args.h, daemon/remote_dispatch_prototypes.h,
daemon/remote_dispatch_ret.h, daemon/remote_dispatch_table.h: Update
with new API
* src/remote/remote_driver.c: Client side dispatcher
* src/remote/remote_protocol.c, src/remote/remote_protocol.h: Update
* src/remote/remote_protocol.x: Define new wire protocol
While running libvirtd under valgrind and doing some
snapshot testing I noticed that we would always leak a
connection reference. The problem was actually that we
were leaking a domain reference in the libvirtd remote
snapshot code, which was in turn causing a leaked
connection reference. Fix the situation by explicitly
taking and dropping a domain reference where we need it.
Signed-off-by: Chris Lalancette <clalance@redhat.com>
The user probably doesn't care what the gai error numbers are, as
much as what the failed conversion IP address was.
* src/remote/remote_driver.c (addrToString): Mention which address
could not be converted.
* daemon/remote.c (addrToString): Likewise.
Noticed because virt-pki-validate was very inconsistent on
using tabs vs. 8 spaces, sometimes mixing both paradigms on
a single line.
'git diff -b' shows significant changes only in cfg.mk.
* cfg.mk (sc_TAB_in_indentation): Add a few files.
* daemon/libvirtd.init.in: Avoid tabs.
* tools/virt-pki-validate.in: Likewise.
If the hostname of the current virtualization machine
could not be resolved, then libvirtd would fail to
start. However, for disconnected operation (on a laptop,
for instance) the hostname may very legitimately not
be resolvable. This patch makes it so that if we can't
resolve the hostname, avahi doesn't fail, it just uses
a less useful MDNS string.
Signed-off-by: Chris Lalancette <clalance@redhat.com>
Based on a warning from coverity. The safe* functions
guarantee complete transactions on success, but don't guarantee
freedom from failure.
* src/util/util.h (saferead, safewrite, safezero): Add
ATTRIBUTE_RETURN_CHECK.
* src/remote/remote_driver.c (remoteIO, remoteIOEventLoop): Ignore
some failures.
(remoteIOReadBuffer): Adjust error messages on read failure.
* daemon/event.c (virEventHandleWakeup): Ignore read failure.
* src/remote/remote_protocol.x src/remote/remote_protocol.h
src/remote/remote_protocol.c src/remote/remote_driver.c: add the entry
points in the remote driver
* daemon/remote.c daemon/remote_dispatch_args.h
daemon/remote_dispatch_prototypes.h daemon/remote_dispatch_table.h:
and implement the daemon counterpart
It supports 3 kind of probing times, at daemon startup, when the
daemon reloads its drivers on SIGHUP and when the daemon exits
* daemon/libvirtd.c: daemon hooks for startup, reload and exit
This patch implements the core driver and provides
- management functionality for managing the filter XMLs
- compiling the internal filter representation into ebtables rules
- applying ebtables rules on a network (tap,macvtap) interface
- tearing down ebtables rules that were applied on behalf of an
interface
- updating of filters while VMs are running and causing the firewalls to
be rebuilt
- other bits and pieces
Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
This patch adds the definition of the wire format for RPC calls
and implementation of the RPC client & server code
Signed-off-by: Stefan Berger <stefanb@us.ibm.com>
This defines the wire format for the new virDomainUpdateDeviceFlags()
API, and implements the server & client side of the marshalling code.
* daemon/remote.c: Server side dispatch for virDomainUpdateDeviceFlags
* src/remote/remote_driver.c: Client side serialization for
virDomainUpdateDeviceFlags
* src/remote/remote_protocol.x: Define wire format for
virDomainUpdateDeviceFlags
* daemon/remote_dispatch_args.h, daemon/remote_dispatch_prototypes.h,
daemon/remote_dispatch_table.h, src/remote/remote_protocol.c,
src/remote/remote_protocol.h: Re-generate code
This introduces a new event type
VIR_DOMAIN_EVENT_ID_GRAPHICS
The same event can be emitted in 3 scenarios
typedef enum {
VIR_DOMAIN_EVENT_GRAPHICS_CONNECT = 0,
VIR_DOMAIN_EVENT_GRAPHICS_INITIALIZE,
VIR_DOMAIN_EVENT_GRAPHICS_DISCONNECT,
} virDomainEventGraphicsPhase;
Connect/disconnect are triggered at socket accept/close.
The initialize phase is immediately after the protocol
setup and authentication has completed. ie when the
client is authorized and about to start interacting with
the graphical desktop
This event comes with *a lot* of potential information
- IP address, port & address family of client
- IP address, port & address family of server
- Authentication scheme (arbitrary string)
- Authenticated subject identity. A subject may have
multiple identities with some authentication schemes.
For example, vencrypt+sasl results in a x509dname
and saslUsername identities.
This results in a very complicated callback :-(
typedef enum {
VIR_DOMAIN_EVENT_GRAPHICS_ADDRESS_IPV4,
VIR_DOMAIN_EVENT_GRAPHICS_ADDRESS_IPV6,
} virDomainEventGraphicsAddressType;
struct _virDomainEventGraphicsAddress {
int family;
const char *node;
const char *service;
};
typedef struct _virDomainEventGraphicsAddress virDomainEventGraphicsAddress;
typedef virDomainEventGraphicsAddress *virDomainEventGraphicsAddressPtr;
struct _virDomainEventGraphicsSubject {
int nidentity;
struct {
const char *type;
const char *name;
} *identities;
};
typedef struct _virDomainEventGraphicsSubject virDomainEventGraphicsSubject;
typedef virDomainEventGraphicsSubject *virDomainEventGraphicsSubjectPtr;
typedef void (*virConnectDomainEventGraphicsCallback)(virConnectPtr conn,
virDomainPtr dom,
int phase,
virDomainEventGraphicsAddressPtr local,
virDomainEventGraphicsAddressPtr remote,
const char *authScheme,
virDomainEventGraphicsSubjectPtr subject,
void *opaque);
The wire protocol is similarly complex
struct remote_domain_event_graphics_address {
int family;
remote_nonnull_string node;
remote_nonnull_string service;
};
const REMOTE_DOMAIN_EVENT_GRAPHICS_IDENTITY_MAX = 20;
struct remote_domain_event_graphics_identity {
remote_nonnull_string type;
remote_nonnull_string name;
};
struct remote_domain_event_graphics_msg {
remote_nonnull_domain dom;
int phase;
remote_domain_event_graphics_address local;
remote_domain_event_graphics_address remote;
remote_nonnull_string authScheme;
remote_domain_event_graphics_identity subject<REMOTE_DOMAIN_EVENT_GRAPHICS_IDENTITY_MAX>;
};
This is currently implemented in QEMU for the VNC graphics
protocol, but designed to be usable with SPICE graphics in
the future too.
* daemon/remote.c: Dispatch graphics events to client
* examples/domain-events/events-c/event-test.c: Watch for
graphics events
* include/libvirt/libvirt.h.in: Define new graphics event ID
and callback signature
* src/conf/domain_event.c, src/conf/domain_event.h,
src/libvirt_private.syms: Extend API to handle graphics events
* src/qemu/qemu_driver.c: Connect to the QEMU monitor event
for VNC events and emit a libvirt graphics event
* src/remote/remote_driver.c: Receive and dispatch graphics
events to application
* src/remote/remote_protocol.x: Wire protocol definition for
graphics events
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
src/qemu/qemu_monitor_json.c: Watch for VNC_CONNECTED,
VNC_INITIALIZED & VNC_DISCONNETED events from QEMU monitor
This introduces a new event type
VIR_DOMAIN_EVENT_ID_IO_ERROR
This event includes the action that is about to be taken
as a result of the watchdog triggering
typedef enum {
VIR_DOMAIN_EVENT_IO_ERROR_NONE = 0,
VIR_DOMAIN_EVENT_IO_ERROR_PAUSE,
VIR_DOMAIN_EVENT_IO_ERROR_REPORT,
} virDomainEventIOErrorAction;
In addition it has the source path of the disk that had the
error and its unique device alias. It does not include the
target device name (/dev/sda), since this would preclude
triggering IO errors from other file backed devices (eg
serial ports connected to a file)
Thus there is a new callback definition for this event type
typedef void (*virConnectDomainEventIOErrorCallback)(virConnectPtr conn,
virDomainPtr dom,
const char *srcPath,
const char *devAlias,
int action,
void *opaque);
This is currently wired up to the QEMU block IO error events
* daemon/remote.c: Dispatch IO error events to client
* examples/domain-events/events-c/event-test.c: Watch for
IO error events
* include/libvirt/libvirt.h.in: Define new IO error event ID
and callback signature
* src/conf/domain_event.c, src/conf/domain_event.h,
src/libvirt_private.syms: Extend API to handle IO error events
* src/qemu/qemu_driver.c: Connect to the QEMU monitor event
for block IO errors and emit a libvirt IO error event
* src/remote/remote_driver.c: Receive and dispatch IO error
events to application
* src/remote/remote_protocol.x: Wire protocol definition for
IO error events
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
src/qemu/qemu_monitor_json.c: Watch for BLOCK_IO_ERROR event
from QEMU monitor
This introduces a new event type
VIR_DOMAIN_EVENT_ID_WATCHDOG
This event includes the action that is about to be taken
as a result of the watchdog triggering
typedef enum {
VIR_DOMAIN_EVENT_WATCHDOG_NONE = 0,
VIR_DOMAIN_EVENT_WATCHDOG_PAUSE,
VIR_DOMAIN_EVENT_WATCHDOG_RESET,
VIR_DOMAIN_EVENT_WATCHDOG_POWEROFF,
VIR_DOMAIN_EVENT_WATCHDOG_SHUTDOWN,
VIR_DOMAIN_EVENT_WATCHDOG_DEBUG,
} virDomainEventWatchdogAction;
Thus there is a new callback definition for this event type
typedef void (*virConnectDomainEventWatchdogCallback)(virConnectPtr conn,
virDomainPtr dom,
int action,
void *opaque);
* daemon/remote.c: Dispatch watchdog events to client
* examples/domain-events/events-c/event-test.c: Watch for
watchdog events
* include/libvirt/libvirt.h.in: Define new watchdg event ID
and callback signature
* src/conf/domain_event.c, src/conf/domain_event.h,
src/libvirt_private.syms: Extend API to handle watchdog events
* src/qemu/qemu_driver.c: Connect to the QEMU monitor event
for watchdogs and emit a libvirt watchdog event
* src/remote/remote_driver.c: Receive and dispatch watchdog
events to application
* src/remote/remote_protocol.x: Wire protocol definition for
watchdog events
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
src/qemu/qemu_monitor_json.c: Watch for WATCHDOG event
from QEMU monitor
This introduces a new event type
VIR_DOMAIN_EVENT_ID_RTC_CHANGE
This event includes the new UTC offset measured in seconds.
Thus there is a new callback definition for this event type
typedef void (*virConnectDomainEventRTCChangeCallback)(virConnectPtr conn,
virDomainPtr dom,
long long utcoffset,
void *opaque);
If the guest XML configuration for the <clock> is set to
offset='variable', then the XML will automatically be
updated with the new UTC offset value. This ensures that
during migration/save/restore the new offset is preserved.
* daemon/remote.c: Dispatch RTC change events to client
* examples/domain-events/events-c/event-test.c: Watch for
RTC change events
* include/libvirt/libvirt.h.in: Define new RTC change event ID
and callback signature
* src/conf/domain_event.c, src/conf/domain_event.h,
src/libvirt_private.syms: Extend API to handle RTC change events
* src/qemu/qemu_driver.c: Connect to the QEMU monitor event
for RTC changes and emit a libvirt RTC change event
* src/remote/remote_driver.c: Receive and dispatch RTC change
events to application
* src/remote/remote_protocol.x: Wire protocol definition for
RTC change events
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor.h,
src/qemu/qemu_monitor_json.c: Watch for RTC_CHANGE event
from QEMU monitor
The reboot event is not a normal lifecycle event, since the
virtual machine on the host does not change state. Rather the
guest OS is resetting the virtual CPUs. ie, the QEMU process
does not restart. Thus, this does not belong in the current
lifecycle events callback.
This introduces a new event type
VIR_DOMAIN_EVENT_ID_REBOOT
It takes no parameters, besides the virDomainPtr, so it can
use the generic callback signature.
* daemon/remote.c: Dispatch reboot events to client
* examples/domain-events/events-c/event-test.c: Watch for
reboot events
* include/libvirt/libvirt.h.in: Define new reboot event ID
* src/conf/domain_event.c, src/conf/domain_event.h,
src/libvirt_private.syms: Extend API to handle reboot events
* src/qemu/qemu_driver.c: Connect to the QEMU monitor event
for reboots and emit a libvirt reboot event
* src/remote/remote_driver.c: Receive and dispatch reboot
events to application
* src/remote/remote_protocol.x: Wire protocol definition for
reboot events
To avoid confusion, rename the current REMOTE_PROC_DOMAIN_EVENT
message to REMOTE_PROC_DOMAIN_EVENT_LIFECYCLE. This does not
cause ABI problems, since the names are only relevant at the source
code level. On the wire they encoding is a plain integer whose
value does not change
* src/remote/remote_protocol.x: Rename REMOTE_PROC_DOMAIN_EVENT
to REMOTE_PROC_DOMAIN_EVENT_LIFECYCLE.
* daemon/remote.c, src/remote/remote_driver.c: Update code for
renamed event
This wires up the remote driver to handle the new events APIs.
The public API allows an application to request a callback filters
events to a specific domain object, and register multiple callbacks
for the same event type. On the wire there are two strategies for
this
- Register multiple callbacks with the remote daemon, each
with filtering as needed
- Register only one callback per event type, with no filtering
Both approaches have potential inefficiency. In the first scheme,
the same event gets sent over the wire many times if multiple
callbacks are registered. With the second scheme, unneccessary
events get sent over the wire if a per-domain filter is set on
the client. The second scheme is far easier to implement though,
so this patch takes that approach.
* daemon/dispatch.h: Don't export remoteRelayDomainEvent since it
is no longer needed for unregistering callbacks, instead the
unique callback ID is used
* daemon/libvirtd.c, daemon/libvirtd.h: Track and unregister
callbacks based on callback ID, instead of function pointer
* daemon/remote.c: Switch over to using virConnectDomainEventRegisterAny
instead of legacy virConnectDomainEventRegister function. Refactor
remoteDispatchDomainEventSend() to cope with arbitrary event types
* src/driver.h, src/driver.c: Move verify() call into source file
instead of header, to avoid polluting the global namespace with
the verify function name
* src/remote/remote_driver.c: Implement new APIs for event
registration. Refactor processCallDispatchMessage() to cope
with arbitrary incoming event types. Merge remoteDomainQueueEvent()
into processCallDispatchMessage() to avoid duplication of code.
Rename remoteDomainReadEvent() to remoteDomainReadEventLifecycle()
* src/remote/remote_protocol.x: Define wire format for the new
virConnectDomainEventRegisterAny and virConnectDomainEventDeregisterAny
functions
