Most of te VIR_INFO calls in the udev driver are only relevant
to developers so can switch to VIR_DEBUG. Failure to initialize
libpciaccess though is a fatal error
When built as modules, the connection drivers live
in $LIBDIR/libvirt/drivers. Now we add lock manager
drivers, we need to distinguish. So move the existing
modules to 'connection-driver'
* src/Makefile.am: Move module install dir
* src/driver.c: Move module search dir
Support SCSI RAID type & lower log level for unknown types
The Linux kernel headers don't have a value for SCSI type 12,
but HAL source code shows this to be a 'raid'. Add workaround
for this type. Lower log level for unknown types since
this is not a fatal error condition. Include the device sysfs
path in the log output to allow identification of which device
has problems.
* src/node_device/node_device_udev.c: Add SCSI RAID type
libpciaccess has many bugs in its pci_system_init/cleanup
functions that makes calling them multiple times unwise.
eg it will double close() FDs, and leak other FDs.
* src/node_device/node_device_udev.c: Only initialize
libpciaccess once
Serge E. Hallyn [Wed, 9 Feb 2011 02:58:24 +0000 (20:58 -0600)]
Don't use CLONE_NEWUSER for now
Until now, user namespaces have not done much, but (for that
reason) have been innocuous to glob in with other CLONE_
flags. Upcoming userns development, however, will make tasks
cloned with CLONE_NEWUSER far more restricted. In particular,
for some time they will be unable to access files with anything
other than the world access perms.
This patch assumes that noone really needs the user namespaces
to be enabled. If that is wrong, then we can try a more
baroque patch where we create a file owned by a test userid with
700 perms and, if we can't access it after setuid'ing to that
userid, then return 0. Otherwise, assume we are using an
older, 'harmless' user namespace implementation.
Eric Blake [Mon, 7 Feb 2011 19:52:29 +0000 (12:52 -0700)]
sysinfo: expose new API
The new virConnectGetSysinfo() API allows one to get the system
information associated to a connection host, providing the same
data as a guest that uses <os><smbios mode='host'/></os>, and in
a format that can be pasted into the guest and edited when using
<os><smbios mode='sysinfo'/></os>.
* include/libvirt/libvirt.h.in (virConnectGetSysinfo): Declare.
* src/libvirt_public.syms: Export new symbol.
Eric Blake [Fri, 4 Feb 2011 15:43:32 +0000 (08:43 -0700)]
spicevmc: support older -device spicevmc of qemu 0.13.0
qemu 0.13.0 (at least as built for Fedora 14, and also backported to
RHEL 6.0 qemu) supported an older syntax for a spicevmc channel; it's
not as flexible (it has an implicit name and hides the chardev
aspect), but now that we support spicevmc, we might as well target
both variants.
* src/qemu/qemu_capabilities.h (QEMUD_CMD_FLAG_DEVICE_SPICEVMC):
New flag.
* src/qemu/qemu_capabilities.c (qemuCapsParseDeviceStr): Set it
correctly.
* src/qemu/qemu_command.h (qemuBuildVirtioSerialPortDevStr): Drop
declaration.
* src/qemu/qemu_command.c (qemuBuildVirtioSerialPortDevStr): Alter
signature, check flag.
(qemuBuildCommandLine): Adjust caller and check flag.
* tests/qemuhelptest.c (mymain): Update test.
* tests/qemuxml2argvtest.c (mymain): New test.
* tests/qemuxml2argvdata/qemuxml2argv-channel-spicevmc-old.xml:
New file.
* tests/qemuxml2argvdata/qemuxml2argv-channel-spicevmc-old.args:
Likewise.
Inspired by https://bugzilla.redhat.com/show_bug.cgi?id=615757
Add a new character device backend for virtio serial channels that
activates the QEMU spice agent on the main channel using the vdagent
spicevmc connection. The <target> must be type='virtio', and supports
an optional name that specifies how the guest will see the channel
(for now, name must be com.redhat.spice.0).
Eric Blake [Thu, 13 Jan 2011 15:54:33 +0000 (08:54 -0700)]
smartcard: check for qemu capability
Qemu smartcard/spicevmc support exists on branches (such as
http://cgit.freedesktop.org/~alon/qemu/commit/?h=usb_ccid.v15&id=024a37b)
but is not yet upstream. The added -help output matches a scratch build
that will be close to the RHEL 6.1 qemu-kvm.
* src/qemu/qemu_capabilities.h (QEMUD_CMD_FLAG_CCID_EMULATED)
(QEMUD_CMD_FLAG_CCID_PASSTHRU, QEMUD_CMD_FLAG_CHARDEV_SPICEVMC):
New flags.
* src/qemu/qemu_capabilities.c (qemuCapsComputeCmdFlags)
(qemuCapsParseDeviceStr): Check for smartcard capabilities.
(qemuCapsExtractVersionInfo): Tweak comment.
* tests/qemuhelptest.c (mymain): New test.
* tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel61: New file.
* tests/qemuhelpdata/qemu-kvm-0.12.1.2-rhel61-device: Likewise.
Eric Blake [Mon, 10 Jan 2011 16:41:33 +0000 (09:41 -0700)]
smartcard: add domain conf support
* src/conf/domain_conf.h (virDomainSmartcardType): New enum.
(virDomainSmartcardDef, virDomainDeviceCcidAddress): New structs.
(virDomainDef): Include smartcards.
(virDomainSmartcardDefIterator): New typedef.
(virDomainSmartcardDefFree, virDomainSmartcardDefForeach): New
prototypes.
(virDomainControllerType, virDomainDeviceAddressType): Add ccid
enum values.
(virDomainDeviceInfo): Add ccid address type.
* src/conf/domain_conf.c (virDomainSmartcard): Convert between
enum and string.
(virDomainSmartcardDefParseXML, virDomainSmartcardDefFormat)
(virDomainSmartcardDefFree, virDomainDeviceCcidAddressParseXML)
(virDomainDefMaybeAddSmartcardController): New functions.
(virDomainDefParseXML): Parse the new XML.
(virDomainDefFormat): Convert back to XML.
(virDomainDefFree): Clean up.
(virDomainDeviceInfoIterate): Iterate over passthrough aliases.
(virDomainController, virDomainDeviceAddress)
(virDomainDeviceInfoParseXML, virDomainDeviceInfoFormat)
(virDomainDefAddImplicitControllers): Support new values.
* src/libvirt_private.syms (domain_conf.h): New exports.
* cfg.mk (useless_free_options): List new function.
(As of this commit, the qemu hypervisor will be the first
implementation, but it only supports one smartcard.)
* docs/formatdomain.html.in (Smartcard devices): New section.
* docs/schemas/domain.rng (smartcard): New define, used in
devices.
* tests/qemuxml2argvdata/qemuxml2argv-smartcard-host.xml: New file
to test schema.
* tests/qemuxml2argvdata/qemuxml2argv-smartcard-host-certificates.xml:
Likewise.
* tests/qemuxml2argvdata/qemuxml2argv-smartcard-passthrough-tcp.xml:
Likewise.
* tests/qemuxml2argvdata/qemuxml2argv-smartcard-controller.xml:
Likewise.
Jiri Denemark [Wed, 2 Feb 2011 15:37:10 +0000 (16:37 +0100)]
qemu: Add shortcut for HMP pass through
Currently users who want to use virDomainQemuMonitorCommand() API or
it's virsh equivalent has to use the same protocol as libvirt uses for
communication to qemu. Since the protocol is QMP with current qemu and
HMP much more usable for humans, one ends up typing something like the
following:
virsh qemu-monitor-command DOM \
'{"execute":"human-monitor-command","arguments":{"command-line":"info kvm"}}'
which is not a very convenient way of debugging qemu.
This patch introduces --hmp option to qemu-monitor-command, which says
that the provided command is in HMP. If libvirt uses QMP to talk with
qemu, the command will automatically be converted into QMP. So the
example above is simplified to just
virsh qemu-monitor-command --hmp DOM "info kvm"
Also the result is converted from
{"return":"kvm support: enabled\r\n"}
to just plain HMP:
kvm support: enabled
If libvirt talks to qemu in HMP, --hmp flag is obviously a noop.
This patch fixes 2 occurrences of nla_put expression with a '!' in
front of them that basically prevented the detection that the buffer
is too small. However, code further below would then detect that the
buffer is too small when further parts are added to the netlink message.
Eric Blake [Wed, 2 Feb 2011 18:16:41 +0000 (11:16 -0700)]
qemu: avoid double shutdown
* src/qemu/qemu_driver.c (qemudShutdownVMDaemon): Check that vm is
still active.
Reported by Wen Congyang as follows:
Steps to reproduce this bug:
1. use gdb to debug libvirtd, and set breakpoint in the function
qemuConnectMonitor()
2. start a vm, and the libvirtd will be stopped in qemuConnectMonitor()
3. kill -STOP $(cat /var/run/libvirt/qemu/<domain>.pid)
4. continue to run libvirtd in gdb, and libvirtd will be blocked in the
function qemuMonitorSetCapabilities()
5. kill -9 $(cat /var/run/libvirt/qemu/<domain>.pid)
Here is log of the qemu:
=========
LC_ALL=C PATH=/sbin:/usr/sbin:/bin:/usr/bin ...
char device redirected to /dev/pts/3
2011-01-27 09:38:48.101: shutting down
2011-01-27 09:41:26.401: shutting down
=========
The vm is shut down twice. I do not know whether this behavior has
side effect, but I think we should shutdown the vm only once.
Niels de Vos [Tue, 1 Feb 2011 16:22:01 +0000 (16:22 +0000)]
qemuBuildDeviceAddressStr() checks for QEMUD_CMD_FLAG_PCI_MULTIBUS
Depending if the qemu binary supports multiple pci-busses, the device
options will contain "bus=pci" or "bus=pci.0".
Only x86_64 and i686 seem to have support for multiple PCI-busses. When
a guest of these architectures is started, set the
QEMUD_CMD_FLAG_PCI_MULTIBUS flag.
Don't sleep in poll() if there is existing SASL decoded data
In the SASL codepath we typically read far more data off the
wire than we immediately need. When using a connection from a
single thread this isn't a problem, since only our reply will
be pending (or an event we can handle directly). When using a
connection from multiple threads though, we may read the data
from replies from other threads. If those replies occur after
our own reply, they'll not be processed. The other thread will
then go into poll() and wait for its reply which has already
been received and decoded. The solution is to set poll() timeout
to 0 if there is pending SASL data.
* src/remote/remote_driver.c: Don't sleep in poll() if SASL
data exists
Eric Blake [Thu, 27 Jan 2011 22:16:14 +0000 (15:16 -0700)]
maint: reject raw close, popen in 'make syntax-check'
commit f1fe9671e was supposed to make sure we use files.h
macros to avoid double close, but it didn't work.
Meanwhile, virCommand is vastly superior to system(), fork(),
and popen() (also to virExec, but we haven't completed that
conversion), so enforce that, too.
* cfg.mk (sc_prohibit_close): Fix typo that excluded close, and
add pclose.
(sc_prohibit_fork_wrappers): New rule, for fork, system, and popen.
* .x-sc_prohibit_close: More exemptions.
* .x-sc_prohibit_fork_wrappers: New file.
* Makefile.am (syntax_check_exceptions): Ship new file.
* src/datatypes.c (virReleaseConnect): Tweak comment to avoid
false positive.
* src/util/files.h (VIR_CLOSE): Likewise.
Eric Blake [Fri, 28 Jan 2011 21:22:39 +0000 (14:22 -0700)]
build: avoid close, system
* src/fdstream.c (virFDStreamOpenFile, virFDStreamCreateFile):
Use VIR_FORCE_CLOSE instead of close.
* tests/commandtest.c (mymain): Likewise.
* tools/virsh.c (editFile): Use virCommand instead of system.
* src/util/util.c (__virExec): Special case preservation of std
file descriptors to child.
Matthias Bolte [Fri, 28 Jan 2011 21:03:24 +0000 (22:03 +0100)]
Add VIR_DIV_UP to divide memory or storage request sizes with round up
Use it in all places where a memory or storage request size is converted
to a larger granularity. This avoids requesting too small memory or storage
sizes that could result from the truncation done by a simple division.
Instead of reporting errors for odd values in the VMX code round them up.
Update the QEMU Argv tests accordingly as the original memory size 219200
isn't a even multiple of 1024 and is rounded up to 215 megabyte now. Change
it to 219100 and 219136. Use two different values intentionally to make
sure that rounding up works.
Update virsh.pod accordingly, as rounding down and rejecting are replaced
by rounding up.
Eric Blake [Wed, 21 Apr 2010 14:28:21 +0000 (16:28 +0200)]
qemu aio: enable support
qemu allows the user to choose what io storage api should be used,
either the default (threads) or native (linux aio) which in the latter
case can result in better performance.
Based on a patch originally by Matthias Dahl.
Red Hat Bugzilla #591703 Signed-off-by: Eric Blake <eblake@redhat.com>
When qemuMonitorSetCapabilities() fails, there is no need to
call qemuMonitorClose(), because the caller will already see
the error code and tear down the entire VM. The extra call to
qemuMonitorClose resulted in a double-free due to it removing
a ref count prematurely.
* src/qemu/qemu_driver.c: Remove premature close of monitor
Prevent overfilling of self-pipe in python event loop
If the event loop takes a very long time todo something, it is
possible for the 'self pipe' buffer to become full at which
point the entire event loop + remote driver deadlock. Use a
boolean flag to ensure we have strict one-in, one-out behaviour
on writes/reads of the 'self pipe'
Wen Congyang [Tue, 25 Jan 2011 10:14:45 +0000 (18:14 +0800)]
Force guest suspend at timeout
If the memory of guest OS is changed constantly, the live migration
can not be ended ever for ever.
We can use the command 'virsh migrate-setmaxdowntime' to control the
live migration. But the value of maxdowntime is diffcult to calculate
because it depends on the transfer speed of network and constantly
changing memroy size. We need a easy way to control the live migration.
This patch adds the support of forcing guest to suspend at timeout.
With this patch, when we migrate the guest OS, we can specify a
timeout. If the live migration timeouts, auto-suspend the guest OS,
where the migration will complete offline.
Hu Tao [Tue, 25 Jan 2011 10:14:28 +0000 (18:14 +0800)]
Cancel migration if user presses Ctrl-C when migration is in progress
While migration is in progress and virsh is waiting for its
completion, user may want to terminate the progress by pressing
Ctrl-C. But virsh just exits on user's Ctrl-C leaving migration
in background that user isn't even aware of. It's not reasonable.
This patch changes the behaviour for migration. For other
commands Ctrl-C still terminates virsh itself.
Eric Blake [Tue, 25 Jan 2011 21:59:50 +0000 (14:59 -0700)]
qemu: use separate alias for chardev and associated device
* src/qemu/qemu_command.c (qemuBuildChrChardevStr): Alter the
chardev alias.
(qemuBuildCommandLine): Output an id for the chardev counterpart.
* tests/qemuxml2argvdata/*: Update tests to match.
Reported by Daniel P. Berrange.
Wen Congyang [Tue, 25 Jan 2011 06:43:43 +0000 (14:43 +0800)]
avoid vm to be deleted if qemuConnectMonitor failed
Steps to reproduce this bug:
1. service libvirtd start
2. virsh start <domain>
3. kill -STOP $(cat /var/run/libvirt/qemu/<domain>.pid)
4. service libvirtd restart
5. kill -9 $(cat /var/run/libvirt/qemu/<domain>.pid)
Then libvirtd will core dump or be in deadlock state.
Make sure that json is built into libvirt and the version
of qemu is newer than 0.13.0.
The reason of libvirtd cores dump is that:
We add vm->refs when we alloc the memory, and decrease it
in the function qemuHandleMonitorEOF() in other thread.
We add vm->refs in the function qemuConnectMonitor() and
decrease it when the vm is inactive.
The libvirtd will block in the function qemuMonitorSetCapabilities()
because the vm is stopped by signal SIGSTOP. Now the vm->refs is 2.
Then we kill the vm by signal SIGKILL. The function
qemuMonitorSetCapabilities() failed, and then we will decrease vm->refs
in the function qemuMonitorClose().
In another thread, mon->fd is broken and the function
qemuHandleMonitorEOF() is called.
If qemuHandleMonitorEOF() decreases vm->refs before qemuConnectMonitor()
returns, vm->refs will be decrease to 0 and the memory is freed.
We will call qemudShutdownVMDaemon() as qemuConnectMonitor() failed.
The memory has been freed, so qemudShutdownVMDaemon() is too dangerous.
We will reference NULL pointer in the function virDomainConfVMNWFilterTeardown():
=============
void
virDomainConfVMNWFilterTeardown(virDomainObjPtr vm) {
int i;
if (nwfilterDriver != NULL) {
for (i = 0; i < vm->def->nnets; i++)
virDomainConfNWFilterTeardown(vm->def->nets[i]);
}
}
============
vm->def->nnets is not 0 but vm->def->nets is NULL(We don't set vm->def->nnets
to 0 when we free vm).
We should add an extra reference of vm to avoid vm to be deleted if
qemuConnectMonitor() failed.
Jiri Denemark [Thu, 27 Jan 2011 18:00:36 +0000 (19:00 +0100)]
tests: Fix virtio channel tests
As noticed by Eric, commit 8e28c5d40200b4c5d483bd585d237b9d870372e5,
which fixed generation of virtio-serial port numbers, forgot to adjust
test files which resulted in make check failure.
Eric Blake [Fri, 21 Jan 2011 19:57:03 +0000 (12:57 -0700)]
event: fix event-handling allocation crash
Regression introduced in commit e6b68d7 (Nov 2010).
Prior to that point, handlesAlloc was always a multiple of
EVENT_ALLOC_EXTENT (10), and was an int (so even if the subtraction
had been able to wrap, a negative value would be less than the count
not try to free the handles array). But after that point,
VIR_RESIZE_N made handlesAlloc grow geometrically (with a pattern of
10, 20, 30, 45 for the handles array) but still freed in multiples of
EVENT_ALLOC_EXTENT; and the count changed to size_t. Which means that
after 31 handles have been created, then 30 handles destroyed,
handlesAlloc is 5 while handlesCount is 1, and since (size_t)(1 - 5)
is indeed greater than 1, this then tried to free 10 elements, which
had the awful effect of nuking the handles array while there were
still live handles.
Nuking live handles puts libvirtd in an inconsistent state, and was
easily reproducible by starting and then stopping 60 faqemu guests.
* daemon/event.c (virEventCleanupTimeouts, virEventCleanupHandles):
Avoid integer wrap-around causing us to delete the entire array
while entries are still active.
* tests/eventtest.c (mymain): Expose the bug.
Osier Yang [Thu, 27 Jan 2011 08:34:54 +0000 (16:34 +0800)]
remote: Add extra parameter pkipath for URI
This new parameter allows user specifies where the client
cerficate, client key, CA certificate of x509 is, instead of
hardcoding it. If 'pkipath' is not specified, and the user
is not root, try to find files in $HOME/.pki/libvirt, as long
as one of client cerficate, client key, CA certificate can
not be found, use default global location (LIBVIRT_CACERT,
LIBVIRT_CLIENTCERT, LIBVIRT_CLIENTKEY, see
src/remote/remote_driver.h)
Example of use:
[root@Osier client]# virsh -c qemu+tls://10.66.93.111/system?pkipath=/tmp/pki/client
error: Cannot access CA certificate '/tmp/pki/client/cacert.pem': No such file
or directory
error: failed to connect to the hypervisor
[root@Osier client]# ls -l
total 24
-rwxrwxr-x. 1 root root 6424 Jan 24 21:35 a.out
-rw-r--r--. 1 root root 1245 Jan 23 19:04 clientcert.pem
-rw-r--r--. 1 root root 132 Jan 23 19:04 client.info
-rw-r--r--. 1 root root 1679 Jan 23 19:04 clientkey.pem
[root@Osier client]# cp /tmp/cacert.pem .
[root@Osier client]# virsh -c qemu+tls://10.66.93.111/system?pkipath=/tmp/pki/client
Welcome to virsh, the virtualization interactive terminal.
Type: 'help' for help with commands
'quit' to quit
virsh #
* src/remote/remote_driver.c: adds support for the new pkipath URI parameter
Osier Yang [Thu, 27 Jan 2011 08:28:19 +0000 (16:28 +0800)]
storage: Round up capacity for LVM volume creation
If vol->capacity is odd, the capacity will be rounded down
by devision, this patch is to round it up instead of rounding
down, to be safer in case of one writes to the volume with the
size he used to create.
- src/storage/storage_backend_logical.c: make sure size is not rounded down
Laine Stump [Mon, 24 Jan 2011 16:58:15 +0000 (11:58 -0500)]
Manually kill gzip if restore fails before starting qemu
If a guest image is saved in compressed format, and the restore fails
in some way after the intermediate process used to uncompress the
image has been started, but before qemu has been started to hook up to
the uncompressor, libvirt will endlessly wait for the uncompressor to
finish, but it never will because it's still waiting to have something
hooked up to drain its output.
The solution is to close the pipes on both sides of the uncompressor,
then send a SIGTERM before calling waitpid on it (only if the restore
has failed, of course).
Filter out certain expected error messages from libvirtd
Add a hook to the error reporting APIs to allow specific
error messages to be filtered out. Wire up libvirtd to
remove VIR_ERR_NO_DOMAIN & similar error codes from the
logs. They are still logged at DEBUG level.
* daemon/libvirtd.c: Filter VIR_ERR_NO_DOMAIN and friends
* src/libvirt_private.syms, src/util/virterror.c,
src/util/virterror_internal.h: Hook for changing error
reporting level
taking us back to state where all errors are fully logged
in both libvirtd and normal clients.
THe intent was to stop VIR_ERR_NO_DOMAIN (No such domain
with UUID XXXX) messages from client apps polluting syslog
The change affected all error codes, but more seriously,
it also impacted errors from internal libvirtd infrastructure
For example guest autostart no longer logged errors. The
libvirtd network code no longer logged some errors. This
makes debugging incredibly hard
(to complete the fix, an updated selinux-policy package is required,
to add the policy that allows libvirt to set the context of a fifo,
which was previously not allowed).
Explanation : When an incoming migration is over a pipe (for example,
if the image was compressed and is being fed through gzip, or was on a
root-squash nfs server, so needed to be opened by a child process
running as a different uid), qemu cannot read it unless the selinux
context label for the pipe has been set properly.
The solution is to check the fd used as the source of the migration
just before passing it to qemu; if it's a fifo (implying that it's a
pipe), we call the newly added virSecurityManagerSetFDLabel() function
to set the context properly.
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