Laine Stump [Fri, 30 Mar 2012 07:16:23 +0000 (03:16 -0400)]
qemu: set default name for SPICE agent channel when generating command
commit b0e2bb33 set a default value for the SPICE agent channel by
inserting it during parsing of the channel XML. That method of setting
a default is problematic because it makes a format/parse roundtrip
unclean, and experience with setting other values as a side effect of
parsing has led to headaches (e.g. automatically setting a MAC address
in the parser when one isn't specified in the input XML).
This patch does not revert commit b0e2bb33 (it will be reverted in a
separate patch) but adds the alternate implementation of simply
inserting the default value in the appropriate place on the qemu
commandline when no value is provided.
qemu_agent: Issue guest-sync prior to every command
If we issue guest command and GA is not running, the issuing thread
will block endlessly. We can check for GA presence by issuing
guest-sync with unique ID (timestamp). We don't want to issue real
command as even if GA is not running, once it is started, it process
all commands written to GA socket.
Michal Privoznik [Fri, 30 Mar 2012 11:37:13 +0000 (13:37 +0200)]
virnetdevtap: Don't check for flags in virNetDevTapCreateFlags
With latest gnulib we are checking even the lowest level functions
whether they check flags. Moreover, we are shadowing the real error
on system without TUNSETIFF support.
The commandhelper.c & ssh.c programs rely on various APIs not present
on Win32. Disable them, since the tests that uses these helpers are
already disabled
* tests/commandhelper.c, tests/ssh.c: Disable on WIN32
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Wen Congyang [Fri, 30 Mar 2012 06:21:49 +0000 (14:21 +0800)]
fix a deadlock when qemu cannot start
When qemu cannot start, we may call qemuProcessStop() twice.
We have check whether the vm is running at the beginning of
qemuProcessStop() to avoid libvirt deadlock. We call
qemuProcessStop() with driver and vm locked. It seems that
we can avoid libvirt deadlock. But unfortunately we may
unlock driver and vm in the function qemuProcessKill() while
vm->def->id is not -1. So qemuProcessStop() will be run twice,
and monitor will be freed unexpectedly. So we should set
vm->def->id to -1 at the beginning of qemuProcessStop().
qemu: Make migration fail when port profile association fails on the dst host
In the current V3 migration protocol, Libvirt does not
check the result of the function
qemuMigrationVPAssociatePortProfiles
This means that it is possible for a migration to complete
successfully even when the VM loses network connectivity on
the destination host.
With this change libvirt aborts the migration
(during the "finish" step) when the above function fails, that
is to say when at least one of the port profile associations fails.
Signed-off by: Christian Benvenuti <benve@cisco.com>
libvirt documentation for channels with type 'spicevmc' says that the
'target' child node has:
"an optional attribute name controls how the guest will have access
to the channel, and defaults to name='com.redhat.spice.0'."
However, this default value is never set in libvirt code base,
there's only a check in qemu_command.c to error out if the name
attribute doesn't have the expected value (if it's set).
This commit sets a default target name for spicevmc channels during
the domain configuration parsing so that the code agrees with the
documentation.
Fixing memory leaks, in addition, the patch also fixes a potential missing
return value issue in 'if (from)' statement, without the fixing, although
the programming met a error, the subsequent codes will be executed
continually.
* tools/virsh.c (cmdSnapshotList): fix memory leaks and missing return value.
actual result:
error: --roots and --from are mutually exclusive
Name Creation Time State
------------------------------------------------------------
libvirt 2012-03-28 13:46:51 +0800 running
Guannan Ren [Tue, 27 Mar 2012 06:06:10 +0000 (14:06 +0800)]
python: Add new helper functions for python to C integral conversion
int libvirt_intUnwrap(PyObject *obj, int *val);
int libvirt_uintUnwrap(PyObject *obj, unsigned int *val);
int libvirt_longUnwrap(PyObject *obj, long *val);
int libvirt_ulongUnwrap(PyObject *obj, unsigned long *val);
int libvirt_longlongUnwrap(PyObject *obj, long long *val);
int libvirt_ulonglongUnwrap(PyObject *obj, unsigned long long *val);
int libvirt_doubleUnwrap(PyObject *obj, double *val);
int libvirt_boolUnwrap(PyObject *obj, bool *val);
Enable all warnings permanently & default to -Werror for GIT builds
Given that we auto-detect whether each -Wxxxx flag is supported by
GCC, and we are warning-free and use automake silent rules, there
is no compelling reason to allow compile warnings to be disabled.
Replace the --enable-compile-warnings flag with a simpler
--enable-werror flag, which defaults to 'yes' if building
from GIT, or 'no' if building from tar.gz
This helps ensure that everyone writing patches for libvirt will
take care to fix their warning problems before submitting for
review
* autobuild.sh: Force -Werror
* configure.ac: Update for LIBVIRT_COMPILE_WARNINGS macro change
* m4/virt-compile-warnings.m4: Permanently enable all warnings,
auto-enable Werror for GIT builds
Enable build of test suite programs by default for GIT checkouts
Add a new flag '--with-test-suite' to configure to control whether
the test suite binaries are built by default. ie built with a
plain 'make', as opposed to delayed until 'make check'
For builds from tar.gz tests will not be built by default. For
builds from GIT, tests with be on by default, to try and ensure
that patch developers don't accidentally break the test suites
without noticing.
* configure.ac: Add --with-test-suite
* tests/Makefile.am: Use noinst_PROGRAMS instead of check_PROGRAMS
if building tests by default. Consolidate setting of TESTS and
{noinst,check}_PROGRAMS to avoid duplication
Stef Walter [Tue, 27 Mar 2012 14:20:54 +0000 (16:20 +0200)]
Change the default of mdns_adv to false
* Don't advertise information on the network without consent of
the user, either through manual configuration, or a user
interface that drives this option.
* Since libvirtd must be configured for network access anyway
(for all but ssh), this setting was not useful "out of the box",
so changing this default setting does not remove "out of the box"
functionality.
Eric Blake [Tue, 27 Mar 2012 14:33:23 +0000 (08:33 -0600)]
snapshot: don't pass NULL to QMP command creation
Commit d42a2ff caused a regression in creating a disk-only snapshot
of a qcow2 disk; by passing the wrong variable to the monitor call,
libvirt ended up creating JSON that looked like "format":null instead
of the intended "format":"qcow2".
To make it easier to diagnose this in the future, make JSON creation
error out if "s:arg" is paired with NULL (it is still possible to
use "n:arg" in the rare cases where qemu will accept a null).
Pass argv to the init binary of LXC, using a new <initarg> element.
* docs/formatdomain.html.in: Document <os> usage for containers
* docs/schemas/domaincommon.rng: Add <initarg> element
* src/conf/domain_conf.c, src/conf/domain_conf.h: parsing and
formatting of <initarg>
* src/lxc/lxc_container.c: Setup LXC argv
* tests/Makefile.am, tests/lxcxml2xmldata/lxc-systemd.xml,
tests/lxcxml2xmltest.c, tests/testutilslxc.c,
tests/testutilslxc.h: Test parsing/formatting of LXC related
XML parts
D. Herrendoerfer [Tue, 27 Mar 2012 12:38:33 +0000 (14:38 +0200)]
qemu,util: on restart of libvirt restart vepa callbacks
When libvirtd is restarted, also restart the netlink event
message callbacks for existing VEPA connections and send
a message to lldpad for these existing links, so it learns
the new libvirtd pid.
Signed-off-by: D. Herrendoerfer <d.herrendoerfer@herrendoerfer.name>
Jiri Denemark [Tue, 27 Mar 2012 11:32:43 +0000 (13:32 +0200)]
qemu: Avoid entering monitor with locked driver
This avoids possible deadlock of the qemu driver in case a domain is
begin migrated (in Begin phase) and unrelated connection to qemu driver
is closed at the right time.
I checked all callers of qemuDomainCheckEjectableMedia() and they are
calling this function with qemu driver locked.
(this same build command works without problem on Fedora 16). Since
the consumer of the qemuProcessReconnectData doesn't assume that the
other fields of the struct are initialized (although it uses them
internally), the simpler solution is to just switch to C99-style
struct initialization (which doesn't require specification of all
fields).
(this same build command works without problem on Fedora 16). All
other struct initializers for this struct have the extra field filled
in (almost always to 0), so the two errant ones were fixed by adding
in the extra 0 field.
Laine Stump [Mon, 26 Mar 2012 18:42:22 +0000 (14:42 -0400)]
build: avoid frame size error when building without -O2
libvirt always adds -Werror-frame-larger-than=4096 to the flags when
it builds. When building on Fedora 17, two functions with multiple
1024 buffers declared inside if {} blocks would generate frame size
errors; apparently the version of gcc on Fedora 16 will merge these
multiple buffers into a single buffer even when optimization is off,
but Fedora 17 won't.
The fix is to declare a single 1024 buffer at the top of the two
offending functions, and reuse the single buffer throughout the
functions.
Added syntax-check rule for return with parentheses
After cleanup introduced with previous commit, there is a need for
syntax-check rule taking care of return(). Regexp used in 'prohibit'
parameter is taken from the cleanup commit and modified so it fits
'grep -E' format. Semicolon at the end is needed, otherwise the regexp
could match return with cast.
Exception is created for python source files because we don't have any
documentation restricting the use of return that matches this case.
Return statements with parameter enclosed in parentheses were modified
and parentheses were removed. The whole change was scripted, here is how:
List of files was obtained using this command:
git grep -l -e '\<return\s*([^()]*\(([^()]*)[^()]*\)*)\s*;' | \
grep -e '\.[ch]$' -e '\.py$'
Found files were modified with this command:
sed -i -e \
's_^\(.*\<return\)\s*(\(\([^()]*([^()]*)[^()]*\)*\))\s*\(;.*$\)_\1 \2\4_' \
-e 's_^\(.*\<return\)\s*(\([^()]*\))\s*\(;.*$\)_\1 \2\3_'
Then checked for nonsense.
The whole command looks like this:
git grep -l -e '\<return\s*([^()]*\(([^()]*)[^()]*\)*)\s*;' | \
grep -e '\.[ch]$' -e '\.py$' | xargs sed -i -e \
's_^\(.*\<return\)\s*(\(\([^()]*([^()]*)[^()]*\)*\))\s*\(;.*$\)_\1 \2\4_' \
-e 's_^\(.*\<return\)\s*(\([^()]*\))\s*\(;.*$\)_\1 \2\3_'
Eric Blake [Mon, 26 Mar 2012 10:23:45 +0000 (11:23 +0100)]
Fix and test round-trip of query parameters
When qparams support was dropped in commit bc1ff160, we forgot
to add tests to ensure that viruri can do the same round trip
handling of a URI. This round trip was broken, due to use
of the old 'query' field of xmlUriPtr, instead of the new
'query_raw'
Also, we forgot to report an OOM error.
* tests/viruritest.c (mymain): Add tests based on just-deleted
qparamtest.
(testURIParse): Allow difference in input and expected output.
* src/util/viruri.c (virURIFormat): Add missing error. Use
query_raw, instead of query for xmlUriPtr object.
Eric Blake [Tue, 20 Mar 2012 21:03:45 +0000 (15:03 -0600)]
snapshot: improve qemu handling of reused snapshot targets
The oVirt developers have stated that the real reasons they want
to have qemu reuse existing volumes when creating a snapshot are:
1. the management framework is set up so that creation has to be
done from a central node for proper resource tracking, and having
libvirt and/or qemu create things violates the framework, and
2. qemu defaults to creating snapshots with an absolute path to
the backing file, but oVirt wants to manage a backing chain that
uses just relative names, to allow for easier migration of a chain
across storage locations.
When 0.9.10 added VIR_DOMAIN_SNAPSHOT_CREATE_REUSE_EXT (commit 4e9953a4), it only addressed point 1, but libvirt was still using
O_TRUNC which violates point 2. Meanwhile, the new qemu
'transaction' monitor command includes a new optional mode argument
that will force qemu to reuse the metadata of the file it just
opened (with the burden on the caller to have valid metadata there
in the first place). So, this tweaks the meaning of the flag to
cover both points as intended for use by oVirt. It is not strictly
backward-compatible to 0.9.10 behavior, but it can be argued that
the O_TRUNC of 0.9.10 was a bug.
Note that this flag is all-or-nothing, and only selects between
'existing' and the default 'absolute-paths'. A more flexible
approach that would allow per-disk selections, as well as adding
support for the 'no-backing-file' mode, would be possible by
extending the <domainsnapshot> xml to have a per-disk mode, but
until we have a management application expressing a need for that
additional complexity, it is not worth doing.
Eric Blake [Sat, 17 Mar 2012 20:16:25 +0000 (14:16 -0600)]
snapshot: wire up qemu transaction command
The hardest part about adding transactions is not using the new
monitor command, but undoing the partial changes we made prior
to a failed transaction.
* src/qemu/qemu_driver.c (qemuDomainSnapshotCreateDiskActive): Use
transaction when available.
(qemuDomainSnapshotUndoSingleDiskActive): New function.
(qemuDomainSnapshotCreateSingleDiskActive): Pass through actions.
(qemuDomainSnapshotCreateXML): Adjust caller.
Eric Blake [Sat, 17 Mar 2012 04:17:28 +0000 (22:17 -0600)]
snapshot: add support for qemu transaction command
QEmu 1.1 is adding a 'transaction' command to the JSON monitor.
Each element of a transaction corresponds to a top-level command,
with the additional guarantee that the transaction flushes all
pending I/O, then guarantees that all actions will be successful
as a group or that failure will roll back the state to what it
was before the monitor command. The difference between a
top-level command:
is just a couple of changed key names and nesting the shorter
command inside a JSON array to the longer command. This patch
just adds the framework; the next patch will actually use a
transaction.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONMakeCommand): Move
guts...
(qemuMonitorJSONMakeCommandRaw): ...into new helper. Add support
for array element.
(qemuMonitorJSONTransaction): New command.
(qemuMonitorJSONDiskSnapshot): Support use in a transaction.
* src/qemu/qemu_monitor_json.h (qemuMonitorJSONDiskSnapshot): Add
argument.
(qemuMonitorJSONTransaction): New declaration.
* src/qemu/qemu_monitor.h (qemuMonitorTransaction): Likewise.
(qemuMonitorDiskSnapshot): Add argument.
* src/qemu/qemu_monitor.c (qemuMonitorTransaction): New wrapper.
(qemuMonitorDiskSnapshot): Pass argument on.
* src/qemu/qemu_driver.c
(qemuDomainSnapshotCreateSingleDiskActive): Update caller.
Eric Blake [Fri, 16 Mar 2012 21:17:13 +0000 (15:17 -0600)]
snapshot: rudimentary qemu support for atomic disk snapshot
Taking an external snapshot of just one disk is atomic, without having
to pause and resume the VM. This also paves the way for later patches
to interact with the new qemu 'transaction' monitor command.
The various scenarios when requesting atomic are:
online, 1 disk, old qemu - safe, allowed by this patch
online, more than 1 disk, old qemu - failure, this patch
offline snapshot - safe, once a future patch implements offline disk snapshot
online, 1 or more disks, new qemu - safe, once future patch uses transaction
Taking an online system checkpoint snapshot is atomic, since it is
done via a single 'savevm' monitor command. Taking an offline system
checkpoint snapshot is atomic, thanks to the previous patch.
* src/qemu/qemu_driver.c (qemuDomainSnapshotCreateXML): Support
new flag for single-disk setups.
(qemuDomainSnapshotDiskPrepare): Check for atomic here.
(qemuDomainSnapshotCreateDiskActive): Skip pausing the VM when
atomic supported.
(qemuDomainSnapshotIsAllowed): Use bool instead of int.
Eric Blake [Fri, 16 Mar 2012 21:23:00 +0000 (15:23 -0600)]
snapshot: add atomic create flag
Right now, it is appallingly easy to cause qemu disk snapshots
to alter a domain then fail; for example, by requesting a two-disk
snapshot where the second disk name resides on read-only storage.
In this failure scenario, libvirt reports failure, but modifies
the live domain XML in-place to record that the first disk snapshot
was taken; and places a difficult burden on the management app
to grab the XML and reparse it to see which disks, if any, were
altered by the partial snapshot.
This patch adds a new flag where implementations can request that
the hypervisor make snapshots atomically; either no changes to
XML occur, or all disks were altered as a group. If you request
the flag, you either get outright failure up front, or you take
advantage of hypervisor abilities to make an atomic snapshot. Of
course, drivers should prefer the atomic means even without the
flag explicitly requested.
There's no way to make snapshots 100% bulletproof - even if the
hypervisor does it perfectly atomic, we could run out of memory
during the followup tasks of updating our in-memory XML, and report
a failure. However, these sorts of catastrophic failures are rare
and unlikely, and it is still nicer to know that either all
snapshots happened or none of them, as that is an easier state to
recover from.
* include/libvirt/libvirt.h.in
(VIR_DOMAIN_SNAPSHOT_CREATE_ATOMIC): New flag.
* src/libvirt.c (virDomainSnapshotCreateXML): Document it.
* tools/virsh.c (cmdSnapshotCreate, cmdSnapshotCreateAs): Expose it.
* tools/virsh.pod (snapshot-create, snapshot-create-as): Document
it.
Eric Blake [Wed, 14 Mar 2012 22:29:21 +0000 (16:29 -0600)]
snapshot: add qemu capability for 'transaction' command
We need a capability bit to gracefully error out if some of the
additions in future patches can't be implemented by the running qemu.
* src/qemu/qemu_capabilities.h (QEMU_CAPS_TRANSACTION): New cap.
* src/qemu/qemu_capabilities.c (qemuCaps): Name it.
* src/qemu/qemu_monitor_json.c (qemuMonitorJSONCheckCommands): Set
it.
Eric Blake [Fri, 23 Mar 2012 22:04:18 +0000 (16:04 -0600)]
build: drop obsolete qparams test
Otherwise, 'make check' breaks since commit bc1ff160 deleted
qparams.h. A later patch will ensure that viruri takes over
what qparams used to do.
* tests/qparamtest.c (mymain): Delete, now that we have viruri.
* tests/Makefile.am (check_PROGRAMS, TESTS, qparamtest_SOURCES):
Delete old test.
* .gitignore: Add recent test additions.
Eric Blake [Fri, 23 Mar 2012 20:23:43 +0000 (14:23 -0600)]
build: fix incorrect enum declaration
Recent changes have caused build failures on systems where pdwtags works:
commit a26a196 mistakenly exported a public variable
commits a26a196, 57ddcc2, 487c063 all had copy-paste bugs in
hand-updating the golden API rather than rerunning pdwtags
* include/libvirt/libvirt.h.in (virDomainEventTrayChangeReason):
Make this a typedef, not external storage.
* src/remote_protocol-structs (remote_procedure): Fix spelling.
Osier Yang [Wed, 14 Mar 2012 15:26:55 +0000 (23:26 +0800)]
qemu: Update domain status to running while wakeup event is emitted
This introduces a new running reason VIR_DOMAIN_RUNNING_WAKEUP,
and new suspend event type VIR_DOMAIN_EVENT_STARTED_WAKEUP.
While a wakeup event is emitted, the domain which entered into
VIR_DOMAIN_PMSUSPENDED will be transferred to "running"
with reason VIR_DOMAIN_RUNNING_WAKEUP, and a new domain lifecycle
event emitted with type VIR_DOMAIN_EVENT_STARTED_WAKEUP.
Osier Yang [Wed, 14 Mar 2012 15:26:53 +0000 (23:26 +0800)]
New domain state pmsuspended
This introduces a new domain state pmsuspended to represent
the domain which has been suspended by guest power management,
e.g. (entered itno s3 state). Because a "running" state could
be confused in this case, one will see the guest is paused
actually while playing. And state "paused" is for the domain
which was paused by virDomainSuspend.
Osier Yang [Wed, 14 Mar 2012 15:26:48 +0000 (23:26 +0800)]
qemu: Do not start with source for removable disks if tray is open
This is similiar with physical world, one will be surprised if the
box starts with medium exists while the tray is open.
New tests are added, tests disk-{cdrom,floppy}-tray are for the qemu
supports "-device" flag, and disk-{cdrom,floppy}-no-device-cap are
for old qemu, i.e. which doesn't support "-device" flag.
Osier Yang [Fri, 23 Mar 2012 13:44:50 +0000 (21:44 +0800)]
Add support for event tray moved of removable disks
This patch introduces a new event type for the QMP event
DEVICE_TRAY_MOVED, which occurs when the tray of a removable
disk is moved (i.e opened or closed):
VIR_DOMAIN_EVENT_ID_TRAY_CHANGE
The event's data includes the device alias and the reason
for tray status' changing, which indicates why the tray
status was changed. Thus the callback definition for the event
is:
Prerna Saxena [Thu, 15 Mar 2012 10:35:26 +0000 (16:05 +0530)]
Implement sysinfo on PowerPC.
Libvirt on x86 parses 'dmidecode' to gather characteristics of host
system. On PowerPC, this is now implemented by reading /proc/cpuinfo
NOTE: memory-DIMM information is not presently implemented.
Acked-by: Daniel Veillard <veillard@redhat.com> Acked-by: Daniel P Berrange <berrange@redhat.com> Signed-off-by: Prerna Saxena <prerna@linux.vnet.ibm.com>
Lookup auth credentials in config file before prompting
When SASL requests auth credentials, try to look them up in the
config file first. If any are found, remove them from the list
that the user is prompted for
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
SASL may prompt for credentials after either a 'start' or 'step'
invocation. In both cases the code to handle this is the same.
Refactor this code into a separate method to reduce the duplication,
since the complexity is about to grow
* src/remote/remote_driver.c: Refactor interaction with SASL
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Rename src/util/authhelper.[ch] to src/util/virauth.[ch]
To follow latest naming conventions, rename src/util/authhelper.[ch]
to src/util/virauth.[ch].
* src/util/authhelper.[ch]: Rename to src/util/virauth.[ch]
* src/esx/esx_driver.c, src/hyperv/hyperv_driver.c,
src/phyp/phyp_driver.c, src/xenapi/xenapi_driver.c: Update
for renamed include files
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Add a virKeyfilePtr object for parsing '.ini' files
The '.ini' file format is a useful alternative to the existing
config file style, when you need to have config files which
are hashes of hashes. The 'virKeyFilePtr' object provides a
way to parse these file types.
Store parsed query parameters directly in the virURIPtr struct
Avoid the need for each driver to parse query parameters itself
by storing them directly in the virURIPtr struct. The parsing
code is a copy of that from src/util/qparams.c The latter will
be removed in a later patch
* src/util/viruri.h: Add query params to virURIPtr
* src/util/viruri.c: Parse query parameters when creating virURIPtr
* tests/viruritest.c: Expand test to cover params
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Instead of just typedef'ing the xmlURIPtr struct for virURIPtr,
use a custom libvirt struct. This allows us to fix various
problems with libxml2. This initially just fixes the query vs
query_raw handling problems.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The parameter in the virURIFormat impl mistakenly used the
xmlURIPtr type, instead of virURIPtr. Since they will soon
cease to be identical, this needs fixing
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Leave all child processes running when stopping systemd service
Currently the libvirt.service unit file for systemd does not
specify any kill mode. So systemd kills off every process
inside its cgroup. ie all dnsmasq processes, all virtual
machines. This obviously not what we want. Set KillMode=process
so that it only kills the top level process of libvirtd
Dave Allan [Thu, 22 Mar 2012 02:07:51 +0000 (22:07 -0400)]
Clarify what documentation is being referenced
virsh.pod had several instances in which it referred to "the
documentation" which was a little puzzling to me since it is
documentation. Reading the document from end to end makes it clear
that it means a specific URI which was noted previously in the text,
but I had never noticed those URIs in several years of referring to
the man page. This patch adds those URIs to several additional places
in the text.
Eric Blake [Tue, 20 Mar 2012 23:04:38 +0000 (17:04 -0600)]
build: drop a painfully long gnulib test
On machines with massive amounts of CPUs, the gnulib 'test-lock'
could take minutes, or even appear to deadlock, because of poor
scaling of timing interactions between multiple cores.
See https://bugzilla.redhat.com/show_bug.cgi?id=797284.
For precedence, note that iwhd has done the same:
https://lists.gnu.org/archive/html/bug-gnulib/2012-01/msg00311.html
We can re-enable things if gnulib ever analyzes and improves the
situation.
Jiri Denemark [Mon, 19 Mar 2012 15:48:43 +0000 (16:48 +0100)]
qemu: Avoid dangling migration-out job when client dies
When a client which started non-p2p migration dies in a bad time, the
source libvirtd never clears the migration job and almost nothing can be
done with the domain without restarting the daemon. This patch makes use
of connection close callbacks and ensures that migration job is properly
discarded when the client disconnects.
Jiri Denemark [Fri, 16 Mar 2012 06:56:19 +0000 (07:56 +0100)]
qemu: Avoid dangling migration-in job on shutoff domains
Destination daemon should not rely on the client or source daemon
(depending on the type of migration) to call Finish when migration
fails, because the client may crash before it can do so. The domain
prepared for incoming migration is set to be destroyed (and migration
job cleaned up) when connection with the client closes but this is not
enough. If the associated qemu process crashes after Prepare step and
the domain is cleaned up before the connection gets closed, autodestroy
is not called for the domain and migration jobs remains set. In case the
domain is defined on destination host (i.e., it is not completely
removed once destroyed) we keep the job set for ever. To fix this, we
register a cleanup callback which is responsible to clean migration-in
job when a domain dies anywhere between Prepare and Finish steps. Note
that we can't blindly clean any job when spotting EOF on monitor since
normally an API is running at that time.
There's no need to throttle migration when targeting a file, so set
migration speed to unlimited prior to migration, and restore to libvirt
default value after migration.
Default units is MB for migrate_set_speed monitor command, so
(INT64_MAX / (1024 * 1024)) is used for unlimited migration speed.
This was reverted because migration to file could not be canceled and
even monitored since qemu was not processing any monitor commands until
the migration finished. This is now different as we make sure the
file descriptor we pass to qemu is able to properly report EAGAIN.
Recent qemu changes might have helped as well.
I tested managedsave with this patch in and indeed, it is 10x faster
while I can still monitor its progress.
Eric Blake [Tue, 20 Mar 2012 22:44:39 +0000 (16:44 -0600)]
python: always include config.h first
On RHEL 5.7, I got this compilation failure:
In file included from /usr/include/python2.4/pyport.h:98,
from /usr/include/python2.4/Python.h:55,
from libvirt.c:3:
../gnulib/lib/time.h:468: error: expected ';', ',' or ')' before '__timer'
Turns out that our '#define restrict __restrict' from config.h wasn't
being picked up. Gnulib _requires_ that all .c files include <config.h>
first, otherwise the gnulib header overrides tend to misbehave.
Laine Stump [Mon, 19 Mar 2012 16:49:17 +0000 (12:49 -0400)]
conf: forbid use of multicast mac addresses
A few times libvirt users manually setting mac addresses have
complained of a networking failure that ends up being due to a multicast
mac address being used for a guest interface. This patch prevents that
by logging an error and failing if a multicast mac address is
encountered in each of the three following cases:
1) domain xml <interface> mac address.
2) network xml bridge mac address.
3) network xml dhcp/host mac address.
There are several other places where a mac address can be input that
aren't controlled in this manner because failure to do so has no
consequences (e.g., if the address will be used to search through
existing interfaces for a match).
The RNG has been updated to add multiMacAddr and uniMacAddr along with
the existing macAddr, and macAddr was switched to uniMacAddr where
appropriate.
Laine Stump [Mon, 19 Mar 2012 03:57:50 +0000 (23:57 -0400)]
conf: return immediately on error in dhcp host element
If an error was encountered parsing a dhcp host entry mac address or
name, parsing would continue and log a less descriptive error that
might make it more difficult to notice the true nature of the problem.
This patch returns immediately on logging the first error.
If a guest's tap device is created using the same MAC address the
guest uses for its own network card (which connects to the tap
device), the Linux kernel will log the following message and traffic
will not pass:
kernel: vnet9: received packet with own address as source address
This patch disallows MAC addresses with a first byte of 0xFE, but only in
the case that the MAC address is used for a guest interface that's
connected by way of a standard tap device. (In other words, the
validation is done at runtime at the same place the MAC address is
modified for the tap device, rather than when mac address is parsed,
the idea being that it is then we know for sure the address will be
problematic.)
Using inheritance, this patch cleans up the cpu_map.xml file and also
sorts all CPU features according to the feature and registry
values. Model features are sorted the same way as foeatures in the
specification.
Also few models that are related were organized together and parts of
the XML are marked with comments
Eric Blake [Fri, 16 Mar 2012 20:43:58 +0000 (14:43 -0600)]
snapshot: make quiesce a bit safer
If a guest is paused, we were silently ignoring the quiesce flag,
which results in unclean snapshots, contrary to the intent of the
flag. Since we can't quiesce without guest agent support, we should
instead fail if the guest is not running.
Meanwhile, if we attempt a quiesce command, but the guest agent
doesn't respond, and we time out, we may have left the command
pending on the guest's queue, and when the guest resumes parsing
commands, it will freeze even though our command is no longer
around to issue a thaw. To be safe, we must _always_ pair every
quiesce call with a counterpart thaw, even if the quiesce call
failed due to a timeout, so that if a guest wakes up and starts
processing a command backlog, it will not get stuck in a frozen
state.
* src/qemu/qemu_driver.c (qemuDomainSnapshotCreateDiskActive):
Always issue thaw after a quiesce, even if quiesce failed.
(qemuDomainSnapshotFSThaw): Add a parameter.
This patch fixes a NULL pointer check that was causing SegFault on
some specific configurations. It also reverts commit 59d0c9801c1ab
that was checking for this value in one place.
A common coding pattern for changing blkio parameters is
1. virDomainGetBlkioParameters
2. change one or more params
3. virDomainSetBlkioParameters
For this to work, it must be possible to roundtrip through
the methods without error. Unfortunately virDomainGetBlkioParameters
will return "" for the deviceWeight parameter for guests by default,
which virDomainSetBlkioParameters will then reject as invalid.
This fixes the handling of "" to be a no-op, and also improves the
error message to tell you what was invalid
== 8 bytes in 1 blocks are definitely lost in loss record 1 of 28
== at 0x4A04A28: calloc (vg_replace_malloc.c:467)
== by 0x3EB7115FB8: xdr_reference (in /lib64/libc-2.12.so)
== by 0x3EB7115F10: xdr_pointer (in /lib64/libc-2.12.so)
== by 0x4D1EA84: xdr_remote_string (remote_protocol.c:40)
== by 0x4D1EAD8: xdr_remote_domain_migrate_prepare3_ret (remote_protocol.c:4772)
== by 0x4D2FFD2: virNetMessageDecodePayload (virnetmessage.c:382)
== by 0x4D2789C: virNetClientProgramCall (virnetclientprogram.c:382)
== by 0x4D0707D: callWithFD (remote_driver.c:4549)
== by 0x4D070FB: call (remote_driver.c:4570)
== by 0x4D12AEE: remoteDomainMigratePrepare3 (remote_driver.c:4138)
== by 0x4CF7BE9: virDomainMigrateVersion3 (libvirt.c:4815)
== by 0x4CF9432: virDomainMigrate2 (libvirt.c:5454)
==
== LEAK SUMMARY:
== definitely lost: 8 bytes in 1 blocks
== indirectly lost: 0 bytes in 0 blocks
== possibly lost: 0 bytes in 0 blocks
== still reachable: 126,995 bytes in 1,343 blocks
== suppressed: 0 bytes in 0 blocks
This patch also fixes the leaks in remoteDomainMigratePrepare and
remoteDomainMigratePrepare2.
Add support for forcing a private network namespace for LXC guests
If no <interface> elements are included in an LXC guest XML
description, then the LXC guest will just see the host's
network interfaces. It is desirable to be able to hide the
host interfaces, without having to define any guest interfaces.
This patch introduces a new feature flag <privnet/> to allow
forcing of a private network namespace for LXC. In the future
I also anticipate that we will add <privuser/> to force a
private user ID namespace.
* src/conf/domain_conf.c, src/conf/domain_conf.h: Add support
for <privnet/> feature. Auto-set <privnet> if any <interface>
devices are defined
* src/lxc/lxc_container.c: Honour request for private network
namespace
Peter Krempa [Thu, 15 Mar 2012 16:10:22 +0000 (17:10 +0100)]
lib: Don't access configuration if none is present
Commit e457d5ef2015e6106094b85f8bbd1582002edc4d adds ability to pass the
default URI using the client configuration file. If the file is not
present, it still accesses the NULL config object causing a segfault.
projects / libvirt.git / log