libcurl uses a SIGALRM in combination with sigsetjmp/siglongjmp to be
able to abort a DNS lookup when it takes too long. The problem with this
in a multi-threaded application is that the signal handler for SIGALRM
and the call to siglongjmp can be executed on a thread that is different
from the one that initially did the SIGALRM setup and the call to
sigsetjmp. In the reported case this triggered a segfault.
Disable libcurl's use of signals to avoid this situation. This has the
disadvantage of losing the ability to abort synchronous DNS lookups which
might result in libcurl getting stuck in a DNS lookup in the worst case.
When libcurl was build with an asynchronous DNS backend such as c-ares
then there is no problem because the timeout mechanism works without
signals here anyway.
Reported by Benjamin Wang.
The output buffer for virFileReadAll was too small for systems with
more than 30 CPUs which leads to a log entry and incorrect behavior.
The new size will be sufficient for the current
architectural limits.
Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
This reverts part of commit 5468594f465; the perl changes in that
patch were sufficient. Since libvirt.syms is already a generated
file created in part from libvirt_private.syms, we don't need a
second pass over libvirt_private.syms in isolation.
* src/Makefile.am: Undo addition of check-private-symfile.
Currently, we are checking if libvirt.so contains public symbols.
However, sometimes we rename an internal symbol and forget to
change libvirt_private.syms accordingly. Hence, it's safer to check
for internal symbols as well.
I noticed that in two places, we require util-linux, and in a third,
we require util-linux-ng. On Fedora (I tested F15 through rawhide),
util-linux-ng is obsoleted by util-linux; on RHEL 6, util-linux
is obsoleted by util-linux-ng. That is, on either platform, either
name will get you the correct package installed (where the preferred
name on fedora is util-linux, and on RHEL 6 is util-linux-ng). But
on RHEL 5, there is no util-linux-ng
* libvirt.spec.in (Requires): Use util-linux, not util-linux-ng.
Use of the wrong attribute name caused the table of contents to
be useless. Fix suggested by Daniel P. Berrange.
* docs/migration.html.in: Use correct anchoring attribute.
Getting a artifact into Maven central has a lot of restrictions as
where the artifact should be hosted.
This seemed like a big hassle which we don't want to go through now.
Document a way for users to use libvirt.org as a repository so they can
fetch the Java bindings with maven.
Signed-off-by: Wido den Hollander <wido@widodh.nl>
Correct the check for the return value of virStrcpyStatic()
when copying port-profile names. Fixes Open vSwitch ports
which utilize port-profiles from network definitions.
Signed-off-by: Kyle Mestery <kmestery@cisco.com>
Several gnulib tests were failing 'make check', and compilation with
CFLAGS=-g failed due to a gcc 4.2.1 limitation.
* .gnulib: Update to latest, for gcc 4.2 support and fixed FreeBSD tests.
The DAC driver is missing parsing of group and user names for DAC labels
and currently just parses uid and gid. This patch extends it to support
names, so the following security label definition is now valid:
<seclabel type='static' model='dac' relabel='yes'>
<label>qemu:qemu</label>
<imagelabel>qemu:qemu</imagelabel>
</seclabel>
When it tries to parse an owner or a group, it first tries to resolve it as
a name, if it fails or it's an invalid user/group name then it tries to
parse it as an UID or GID. A leading '+' can also be used for both owner and
group to force it to be parsed as IDs, so the following example is also
valid:
<seclabel type='static' model='dac' relabel='yes'>
<label>+101:+101</label>
<imagelabel>+101:+101</imagelabel>
</seclabel>
This ensures that UID 101 and GUI 101 will be used instead of an user or
group named "101".
Commit c579d6b added a sledgehammer to silence spurious warnings from
gcc 4.2, but in the process, it also silenced useful warnings from
gcc 4.3 through 4.5. As a result, a bug slipped in to commit 0caccb58.
Tested with FreeBSD (gcc 4.2.1), RHEL 6.3 (gcc 4.4), and F17 (gcc 4.7.2),
where the former didn't trip on spurious warnings, and where the latter
two detected a revert of 2b804cf.
* m4/virt-compile-warnings.m4 (-Wno-format): Probe for the actual
spurious message, to once again allow gcc 4.4 to use -Wformat.
Introduced in commit 0caccb58.
CC libvirt_driver_qemu_impl_la-qemu_capabilities.lo
../../src/qemu/qemu_capabilities.c: In function 'qemuCapsInitQMP':
../../src/qemu/qemu_capabilities.c:2327:13: error: format '%d' expects argument of type 'int', but argument 8 has type 'const char *' [-Werror=format]
* src/qemu/qemu_capabilities.c (qemuCapsInitQMP): Use correct format.
Since libvirt switched to QMP capabilities probing recently, it starts
QEMU process used for this probing with -daemonize, which means
virCommandAbort can no longer reach these processes. As a result of
that, restarting libvirtd will leave several new QEMU processes behind.
Let's use QEMU's -pidfile and use it to kill the process when QMP caps
probing is done.
When doing snapshots, the filesystem freeze function used the agent
entering function that expects the qemud_driver unlocked. This might
cause a deadlock of the qemu driver if the agent does not respond.
The only call path of this function has the qemud_driver locked, so this
patch changes the entering functions to those expecting the driver
locked.
There was an inverted return value in lxcCgroupControllerActive().
The function assumes cgroups are active and do couple of checks
to prove that. If any of them fails, false is returned. Therefore,
at the end, after all checks are done we must return true, not false.
Commit f6430390 broke builds on RHEL 5, where glibc (2.5) is too
old to support mkostemp (2.7) or htole64 (2.9). While gnulib
has mkostemp, it still lacks htole64; and it's not worth dragging
in replacements on systems where journald is unlikely to exist
in the first place, so we just use an extra configure-time check
as our witness of whether to attempt compiling the code.
* src/util/logging.c (virLogParseOutputs): Don't attempt to
compile journald on older glibc.
* configure.ac (AC_CHECK_DECLS): Check for htole64.
Several people have reported that if the .gnulib submodule is dirty,
then 'make' will go into an infinite loop attempting to rerun bootstrap,
because that never cleans up the dirty submodule. By default, we
should halt and make the user investigate, but if the user doesn't
know why or care that the submodule is dirty, I also added the ability
to 'make CLEAN_SUBMODULE=1' to get things going again.
Also, while testing this, I noticed that when a submodule update was
needed, 'make' would first run autoreconf, then bootstrap (which
reruns autoreconf); adding a strategic dependency allows for less work.
* .gnulib: Update to latest, for maint.mk improvements.
* cfg.mk (_autogen): Also hook maint.mk, to run before autoreconf.
* autogen.sh (bootstrap): Refuse to run if gnulib is dirty, unless
user requests discarding gnulib changes.
Use MATCH for all flags checks.
hypervMsvmComputerSystemToDomain expects the domain pointer to the
initialized to NULL.
All items in doms up to the count-th one are valid, no need to double
check before freeing them.
Avoid requesting information such as identity or power state when it
is not necessary.
Lookup virtual machine list with the required fields (configStatus,
name, and config.uuid) to make esxVI_GetVirtualMachineIdentity work.
No need to call esxVI_GetNumberOfSnapshotTrees. rootSnapshotTreeList
can be tested for emptiness by checking it for NULL.
esxVI_LookupRootSnapshotTreeList already does the error reporting,
don't overwrite it.
Check if autostart is enabled at all before looking up the individual
autostart setting of a virtual machine.
Reorder VIR_EXPAND_N(doms, ndoms, 1) to avoid leaking the result of
the call to virGetDomain if VIR_EXPAND_N fails.
Replace VIR_EXPAND_N by VIR_RESIZE_N to avoid quadratic scaling, as in
the Hyper-V version of the function.
If virGetDomain fails it already reports an error, don't overwrite it
with an OOM error.
All items in doms up to the count-th one are valid, no need to double
check before freeing them.
Finally, don't leak autoStartDefaults and powerInfoList.
Currently if you build on a machine that does not support SELinux we end up
with the default mount point being /selinux, since this is moved to
/sys/fs/selinux, we should start defaulting there.
I believe this is causing a bug in libvirt-lxc when /selinux does not exists,
even though /sys/fs/selinux exists.
Start a QEMU process using
$QEMU -S -no-user-config -nodefaults \
-nographic -M none -qmp unix:/some/path,server,nowait
and talk QMP over stdio to discover what capabilities the
binary supports. This works for QEMU 1.2.0 or later and
for older QEMU automatically fallback to the old approach
of parsing -help and related command line args.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Some architectures provide the query-cpu-definitions command,
but are set to always return a "GenericError" from it :-(
Catch this & treat it as if there was an empty list of CPUs
returned
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
After calling qemuMonitorClose(), it is still possible for
the QEMU monitor I/O event callback to get invoked. This
will trigger an error message because mon->fd has been set
to -1 at this point. Silently ignore the case where mon->fd
is -1, likewise for mon->watch being zero.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The qemuMonitorOpen method only needs a virDomainObjPtr in order
to access the QEMU pid. This is not critical when detecting the
QEMU capabilties, so can easily be skipped
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The help output for QEMU 1.2.0 changed 'pci-assign' to 'kvm-pci-assign'.
Since the new capabilities code does exact device name matching
instead of substring matching, this caused the capabilities to go
missing.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Probe to see if the systemd journal is accessible, and if
so enable logging to the journal by default, rather than
stderr (current default under systemd).
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Add support for logging to the systemd journal, using its
simple client library. The benefit over syslog is that it
accepts structured log data, so the journald can store
individual items like code file/line/func separately from
the string message. Tools which require structured log
data can then query the journal to extract exactly what
they desire without resorting to string parsing
While systemd provides a simple client library for logging,
it is more convenient for libvirt to directly write its
own client code. This lets us build up the iovec's on
the stack, avoiding the need to alloc memory when writing
log messages.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently the qemuCapsParseDeviceStr method has a bunch of open
coded string searches/comparisons to detect devices and their
properties. Soon this data will be obtained from QMP queries
instead of -device help output. Maintaining the list of device
and properties in two places is undesirable. Thus the existing
qemuCapsParseDeviceStr() method needs to be refactored to
separate the device types and properties from the actual
search code.
Thus the -device help output is now parsed to construct a
list of device names, and device properties. These are then
checked against a set of datatables to set the capability
flags
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The virInitialize function initializes logging from the env,
so there is no need for another call to virLogSetFromEnv
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The 'const char *category' parameter only has a few possible
values now that the filename has been separated. Turn this
parameter into an enum instead.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Currently the logging APIs have a 'const char *category' parameter
which indicates where the log message comes from. This is typically
a combination of the __FILE__ string and other prefix. Split the
__FILE__ off into a dedicated parameter so it can passed to the
log outputs
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
General whitespace cleanup in the logging files
- Move '{' to a new line after funtion declaration
- Put each parameter on a new line to avoid long lines
- Put return type on new line
- Leave 2 blank lines between functions
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The log destinations are an enum, but most of the code was
just using a plain 'int' for function params / variables.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The __LINE__ macro value is specified to fit in the size_t
type, so use that instead of 'long long' in the logging code
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The log priority levels are an enum, but most of the code was
just using a plain 'int' for function params / variables.
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The result is indeterminate for NULL argument to python
functions as follows. It's better to return negative value in
these situations.
PyObject_IsTrue will segfault if the argument is NULL
PyFloat_AsDouble(NULL) is -1.000000
PyLong_AsUnsignedLongLong(NULL) is 0.000000
I hit this problem recently when trying to create a bridge with an IPv6
address on a 3.2 kernel: dnsmasq (and, further, radvd) would not bind to
the given address, waiting 20s and then giving up with -EADDRNOTAVAIL
(resp. exiting immediately with "error parsing or activating the config
file", without libvirt noticing it, BTW). This can be reproduced with (I
think) any kernel >= 2.6.39 and the following XML (to be used with
"virsh net-create"):
<network>
<name>test-bridge</name>
<bridge name='testbr0' />
<ip family='ipv6' address='fd00::1' prefix='64'>
</ip>
</network>
(it happens even when you have an IPv4, too)
The problem is that since commit [1] (which, ironically, was made to
“help IPv6 autoconfiguration”) the linux bridge code makes bridges
behave like “real” devices regarding carrier detection. This makes the
bridges created by libvirt, which are started without any up devices,
stay with the NO-CARRIER flag set, and thus prevents DAD (Duplicate
address detection) from happening, thus letting the IPv6 address flagged
as “tentative”. Such addresses cannot be bound to (see RFC 2462), so
dnsmasq fails binding to it (for radvd, it detects that "interface XXX
is not RUNNING", thus that "interface XXX does not exist, ignoring the
interface" (sic)). It seems that this behavior was enhanced somehow with
commit [2] by avoiding setting NO-CARRIER on empty bridges, but I
couldn't reproduce this behavior on my kernel. Anyway, with the “dummy
tap to set MAC address” trick, this wouldn't work.
To fix this, the idea is to get the bridge's attached device to be up so
that DAD can happen (deactivating DAD altogether is not a good idea, I
think). Currently, libvirt creates a dummy TAP device to set the MAC
address of the bridge, keeping it down. But even if we set this device
up, it is not RUNNING as soon as the tap file descriptor attached to it
is closed, thus still preventing DAD. So, we must modify the API a bit,
so that we can get the fd, keep the tap device persistent, run the
daemons, and close it after DAD has taken place. After that, the bridge
will be flagged NO-CARRIER again, but the daemons will be running, even
if not happy about the device's state (but we don't really care about
the bridge's daemons doing anything when no up interface is connected to
it).
Other solutions that I envisioned were:
* Keeping the *-nic interface up: this would waste an fd for each
bridge during all its life. May be acceptable, I don't really
know.
* Stop using the dummy tap trick, and set the MAC address directly
on the bridge: it is possible since quite some time it seems,
even if then there is the problem of the bridge not being
RUNNING when empty, contrary to what [2] says, so this will need
fixing (and this fix only happened in 3.1, so it wouldn't work
for 2.6.39)
* Using the --interface option of dnsmasq, but I saw somewhere
that it's not used by libvirt for backward compatibility. I am
not sure this would solve this problem, though, as I don't know
how dnsmasq binds itself to it with this option.
This is why this patch does what's described earlier.
This patch also makes radvd start even if the interface is
“missing” (i.e. it is not RUNNING), as it daemonizes before binding to
it, and thus sometimes does it after the interface has been brought down
by us (by closing the tap fd), and then originally stops. This also
makes it stop yelling about it in the logs when the interface is down at
a later time.
[1]
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=1faa4356a3bd89ea11fb92752d897cff3a20ec0e
[2]
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux.git;a=commit;h=b64b73d7d0c480f75684519c6134e79d50c1b341
If QEMU reports CommandNotFound for the 'query-events' command,
we must treat that as success, returning a zero-length array
of events
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
In Xen 4.2, xs.h is deprecated in favor of xenstore.h. xs.h now
contains
#warning xs.h is deprecated use xenstore.h instead
#include <xenstore.h>
which fails compilation when warnings are treated as errors.
Introduce a configure-time check for xenstore.h and if found,
use it instead of xs.h.
In addition to the preformatted text line, pass the raw message as well,
to allow the output functions to use a different output format.
Signed-off-by: Miloslav Trmač <mitr@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Allow for the code converting from libvirt log levels to syslog
log levels to be reused.
Signed-off-by: Miloslav Trmač <mitr@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The qemuMonitorSetCapabilities() API is used to initialize the QMP
protocol capabilities. It has since been abused to initialize some
libvirt internal capabilities based on command/event existance too.
Move the latter code out into qemuCapsProbeQMP() in the QEMU
capabilities source file instead
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
The qemu monitor does not require qemu_conf.h, and the
qemu capabilities code actually wants bitmap.h
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Add a new qemuMonitorGetTargetArch() method to support invocation
of the 'query-target' JSON monitor command. No HMP equivalent
is required, since this will only be present for QEMU >= 1.2
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
