Commit Graph

9453 Commits

Author SHA1 Message Date
Osier Yang
9049d6a8c7 qemu: Change values of disk discard
QEMU might support more values for "-drive discard", so using Bi-state
values (on/off) for it doesn't make sense.

"on" maps to "unmap", "off" maps to "ignore":

<...>
@var{discard} is one of "ignore" (or "off") or "unmap" (or "on") and
controls whether @dfn{discard} (also known as @dfn{trim} or @dfn{unmap})
requests are ignored or passed to the filesystem.  Some machine types
may not support discard requests.
</...>
2013-05-17 13:03:25 +08:00
Jiri Denemark
fd74f74fe6 qemu: Implement support for locking domain's memory pages 2013-05-16 23:21:58 +02:00
Jiri Denemark
555866389c Add support for locking domain's memory pages
The following XML configuration can be used to request all domain's
memory pages to be kept locked in host's memory (i.e., domain's memory
pages will not be swapped out):

      <memoryBacking>
        <locked/>
      </memoryBacking>
2013-05-16 23:03:08 +02:00
Martin Kletzander
0471637d56 qemu: Fix cgroup handling when setting VCPU BW
Commit 632f78c introduced a regression which causes schedinfo being
unable to set some parameters.  When migrating to priv->cgroup there
was missing variable left out and due to passed NULL to underlying
function, the setting failed.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=963592
2013-05-16 22:13:29 +02:00
Osier Yang
a842df78ea qemu: Set unpriv_sgio for scsi host device 2013-05-17 01:00:01 +08:00
Osier Yang
0453bcdfc3 qemu: Refactor qemuSetUnprivSGIO to support scsi host device
Just like what previous patches do, it refactors qemuSetUnprivSGIO
to take the virDomainDeviceDefPtr as argument instead.
2013-05-17 00:57:01 +08:00
Osier Yang
99fdd434bc qemu: Move qemuSetUnprivSGIO into qemu_conf.c
unpriv_sgio setting is tight with the shared device helpers, let's
put them together in qemu_conf.c
2013-05-17 00:51:58 +08:00
Osier Yang
6765316093 conf: Introduce sgio for hostdev
"sgio" is only valid for scsi host device.
2013-05-17 00:46:44 +08:00
Osier Yang
ead4391562 Rename virDomainDiskSGIO to virDomainDeviceSGIO
SCSI host device will also support "sgio", and perhaps we could
use "sgio" in other places too in future, renaming the enum to
reuse.
2013-05-17 00:43:38 +08:00
Osier Yang
1d94b3e760 qemu: Manage shared device entry for scsi host device
This adds the shared device entry when starting domain (more
exactly, when preparing host devices), and remove the entry
when destroying domain (when reattaching host devices).
2013-05-17 00:34:29 +08:00
Osier Yang
aeda1ff12d qemu: Refactor the helpers to track shared scsi host device
This changes the helpers qemu{Add,Remove}SharedDisk into
qemu{Add,Remove}SharedDevice, as most of the code in the helpers
can be reused for scsi host device.

To track the shared scsi host device, first it finds out the
device path (e.g. /dev/s[dr]*) which is mapped to the sg device,
and use device ID of the found device path (/dev/s[dr]*) as the
hash key. This is because of the device ID is not unique between
between /dev/s[dr]* and /dev/sg*, e.g.

% sg_map
/dev/sg0  /dev/sda
/dev/sg1  /dev/sr0

% ls -l /dev/sda
brw-rw----. 1 root disk 8, 0 May  2 19:26 /dev/sda

%ls -l /dev/sg0
crw-rw----. 1 root disk 21, 0 May  2 19:26 /dev/sg0
2013-05-17 00:32:09 +08:00
Osier Yang
28d3ad952f utils: Add a helper to get the device name that sg device mapped to
E.g.

% sg_map
/dev/sg0  /dev/sda
/dev/sg1  /dev/sr0

What the helper gets for /dev/sg0 is /dev/sda, it will be used by
later patch.
2013-05-16 23:50:00 +08:00
Osier Yang
539d0e19fd qemu: Rename qemu_driver->sharedDisks to qemu_driver->sharedDevices
"Shared disk" is not only the thing we should care about after "scsi
hostdev" is introduced. A same scsi device can be used as "disk" for
one domain, and as "scsi hostdev" for another domain at the same time.
That's why this patch renames qemu_driver->sharedDisks. Related functions
and structs are also renamed.
2013-05-16 23:48:27 +08:00
Osier Yang
f2c1d9a804 conf: Introduce <shareable> for hostdev
Unlike disk device, the scsi-generic always writethrough the data,
so no need to introduce a "cache" tag, and set "cache=off".
2013-05-16 23:41:25 +08:00
Daniel P. Berrange
95c6cc344b Don't mount selinux fs in LXC if selinux is disabled
Before trying to mount the selinux filesystem in a container
use is_selinux_enabled() to check if the machine actually
has selinux support (eg not booted with selinux=0)

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-16 16:28:53 +01:00
Daniel P. Berrange
ba5f3c7c8e Move VirtualBox driver into libvirtd
Change the build process & driver initialization so that the
VirtualBox driver is built into libvirtd, instead of libvirt.so
This change avoids the VirtualBox GPLv2-only license causing
compatibility problems with libvirt.so which is under the
GPLv2-or-later license.

NB this change prevents use of the VirtualBox driver on the
Windows platform, until such time as libvirtd can be made
to work there.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-16 16:28:53 +01:00
Daniel P. Berrange
d7d7581b03 Fix LXC startup when /var/run is an absolute symlink
During startup, the LXC driver uses paths such as

  /.oldroot/var/run/libvirt/lxc/...

to access directories from the previous root filesystem
after doing a pivot_root(). Unfortunately if /var/run
is an absolute symlink to /run, instead of a relative
symlink to ../run, these paths break.

At least one Linux distro is known to use an absolute
symlink for /var/run, so workaround this, by resolving
all symlinks before doing the pivot_root().

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-16 16:28:53 +01:00
Osier Yang
e3b40bec42 conf: Fix the bug of disk->copy_on_read formating
The reason for it's not exposed for such long time is that the
enums for VirtioEventIdx and CopyOnReadType have same enum values
and Correspondingstrings. This fixes the bug and adds test.
2013-05-16 23:07:51 +08:00
Ján Tomko
d3842cb4e4 datatypes: fix virGetStoragePool's comment 2013-05-16 16:26:21 +02:00
Viktor Mihajlovski
9684bb11fd qemu: Fix crash in migration of graphics-less guests.
Commit 7f15ebc7a2 introduced a bug
happening when guests without a <graphics> element are migrated.
The initialization of listenAddress happens unconditionally
from the cookie even if the cookie->graphics pointer was NULL.
Moved the initialization to where it is safe.

Signed-off-by: Viktor Mihajlovski <mihajlov@linux.vnet.ibm.com>
2013-05-16 15:48:34 +02:00
Jiri Denemark
e13e548fc2 build: Fix check-driverimpls in VPATH
DRIVER_SOURCE_FILES mixes files with absolute path (inherited from
REMOTE_DRIVER_GENERATED) with file paths that are relative to srcdir but
check-driverimpls.pl needs full paths.
2013-05-16 15:45:43 +02:00
Jiri Denemark
c431f06587 util: Fix build without devmapper
stdlib.h header file needed for getenv was only transitively included
through libdevmapper.h.
2013-05-16 12:15:38 +02:00
Osier Yang
a3f600f908 conf: Improve the coding style
Add spaces around "<<", and remove the useless blank-line.
2013-05-16 11:11:17 +08:00
Stefan Berger
a6a04ea47a nwfilter: check for inverted ctdir
Linux netfilter at some point (Linux 2.6.39) inverted the meaning of the
'--ctdir reply' and newer netfilter implementations now expect
'--ctdir original' instead and vice-versa.
We check for the kernel version and assume that all Linux kernels with version
2.6.39 have the newer inverted logic.

Any distro backporting the Linux kernel patch that inverts the --ctdir logic
(Linux commit 96120d86f) must also backport this patch for Linux and
adapt the kernel version being tested for.

Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>
2013-05-15 21:02:11 -04:00
John Ferlan
a2c37618d3 Adjust improperly formatted <sysinfo> uuid
If the <sysinfo> system table 'uuid' field is improperly formatted,
then qemu will fail to start the guest with the error:

virsh start dom
error: Failed to start domain dom
error: internal error process exited while connecting to monitor: Invalid SMBIOS UUID string

This was because the parsing rules were lax with respect to allowing extraneous
spaces and dashes in the provided UUID.  As long as there were 32 hexavalues
that matched the UUID for the domain the string was accepted. However startup
failed because the string format wasn't correct. This patch will adjust the
string format so that when it's presented to the driver it's in the expected
format.

Added a test for uuid comparison within sysinfo.
2013-05-15 12:05:22 -04:00
John Ferlan
21540f5ee3 Validate the bios_date format for <sysinfo>
Add incorrectly formatted bios_date validation test
2013-05-15 12:05:22 -04:00
Dan Walsh
940c6f1085 Change label of fusefs mounted at /proc/meminfo in lxc containers
We do not want to allow contained applications to be able to read fusefs_t.
So we want /proc/meminfo label to match the system default proc_t.

Fix checking of error codes
2013-05-15 17:39:22 +02:00
Daniel P. Berrange
7bb7510de7 Remove obsolete skipRoot flag in LXC driver
The lxcContainerMountAllFS method had a 'bool skipRoot'
flag to control whether it mounts the / filesystem. Since
removal of the non-pivot root container setup codepaths,
this flag is obsolete as the only caller always passes
'true'.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-15 17:29:35 +02:00
Daniel P. Berrange
31453a837b Stop passing around old root directory prefix
Many methods accept a string parameter specifying the
old root directory prefix. Since removal of the non-pivot
root container setup codepaths, this parameter is obsolete
in many methods where the callers always pass "/.oldroot".

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-15 17:29:35 +02:00
Daniel P. Berrange
37cebfec92 Remove obsolete pivotRoot flag in LXC driver
The lxcContainerMountBasicFS method had a 'bool pivotRoot'
flag to control whether it mounted a private /dev. Since
removal of the non-pivot root container setup codepaths,
this flag is obsolete as the only caller always passes
'true'.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-15 17:29:35 +02:00
Christophe Fergeau
9a8f39d097 storage: Ensure 'qemu-img resize' size arg is a 512 multiple
qemu-img resize will fail with "The new size must be a multiple of 512"
if libvirt doesn't round it first.
This fixes rhbz#951495

Signed-off-by: Christophe Fergeau <cfergeau@redhat.com>
2013-05-15 13:45:51 +02:00
Osier Yang
a7c4202cdd qemu: Support discard for disk
QEMU introduced "discard" option for drive since commit a9384aff53,

<...>
@var{discard} is one of "ignore" (or "off") or "unmap" (or "on") and
controls whether @dfn{discard} (also known as @dfn{trim} or @dfn{unmap})
requests are ignored or passed to the filesystem.  Some machine types
may not support discard requests.
</...>

This patch exposes the support in libvirt.

QEMU supported "discard" for "-drive" since v1.5.0-rc0:

% git tag --contains a9384aff53
contains
v1.5.0-rc0
v1.5.0-rc1

So this only detects the capability bit using virQEMUCapsProbeQMPCommandLine.
2013-05-15 19:01:00 +08:00
John Ferlan
efdcc92faa Handle the domain event 'on_reboot' and 'on_poweroff' settings 2013-05-15 06:25:41 -04:00
John Ferlan
f612664baa Adjust comments to describe on_poweroff and on_reboot action 2013-05-15 06:25:36 -04:00
John Ferlan
0e034efaf9 Adjust usage of qemu -no-reboot and -no-shutdown options
During building of the qemu command line determine whether to add/use the
'-no-reboot' option only if each of the 'on' events want to to destroy
the domain; otherwise, use the '-no-shutdown' option.

Prior to this change both could be on the command line, which while allowed
could be construed as a conflict.
2013-05-15 06:19:32 -04:00
Martin Kletzander
85ec7ff6fd qemu: Add VNC WebSocket support
Adding a VNC WebSocket support for QEMU driver.  This functionality is
in upstream qemu from commit described as v1.3.0-982-g7536ee4, so the
capability is being recognized based on QEMU version for now.
2013-05-15 09:48:05 +02:00
Martin Kletzander
f1ad8d2079 Add VNC WebSocket support
Adding support for new attribute 'websocket' in the '<graphics>'
element, the attribute value is the port to listen on with '-1'
meaning auto-allocation, '0' meaning no websockets.
2013-05-15 09:38:56 +02:00
Osier Yang
77b54b9661 qemu: New XML to disable memory merge at guest startup
QEMU introduced command line "-mem-merge=on|off" (defaults to on) to
enable/disable the memory merge (KSM) at guest startup. This exposes
it by new XML:
  <memoryBacking>
    <nosharepages/>
  </memoryBacking>

The XML tag is same with what we used internally for old RHEL.
2013-05-15 11:25:45 +08:00
Eric Blake
d12bbd6a7d qemu: detect -machine mem-merge capability
* src/qemu/qemu_capabilities.h: New capability bit.
* src/qemu/qemu_capabilities.c (virQEMUCapsProbeQMPCommandLine): New
function, based on qemuMonitorGetCommandLineOptionParameters, which was
introduced by commit bd56d0d813; use it to set new capability bit.
(virQEMUCapsInitQMP): Use new function.
2013-05-15 11:25:42 +08:00
Martin Kletzander
84d9142495 Fix invalid argument reference in virnetdev.h
Commit ccff335f added ATTRIBUTE_NONNULL for an attribute which is not
a pointer and made files including virnetdev.h not compilable, so fix
that.
2013-05-14 18:27:51 +02:00
Daniel P. Berrange
2a2bc1517a Forbid use of ':' in RBD pool names
The QEMU command line syntax for RBD disks is

   file=rbd:pool/image:opt1=val1:opt2=val2...

There is no way to escape the ':' if it appears in the
pool or image name. Thus it must be explicitly forbidden
if it occurs in the libvirt XML. People are known to
be abusing the lack of escaping in current libvirt to
pass arbitrary args to QEMU.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-14 15:02:42 +01:00
Daniel P. Berrange
71b54636f0 Don't duplicate compiler warning flags when linking
Automake already passes all CFLAGS to the linker too, so it
is not necessary to set WARN_LDFLAGS in addition to the
WARN_CFLAGS variable.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-14 15:02:37 +01:00
Daniel P. Berrange
421846e4a3 Only pass -export-dynamic to linker, not compiler
Clang does not like the -export-dynamic flag. The compiler does
not need it in the first place, so we can avoid the problem by
only setting it for the linker

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-14 15:00:22 +01:00
Daniel P. Berrange
7d73b11427 Ignore cast alignment warnings in inotify code for Xen.
The inotify Xen code causes a cast alignment warning, but this
is harmless since the kernel inotify interface will ensure
sufficient alignment of the inotify structs in the buffer being
read

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-14 15:00:22 +01:00
Daniel P. Berrange
c43b685a1d Ensure consistent enablement of gcc 'diagnostic' pragma
The virt-compile-warnings.m4 file would do an explicit
check for whether the compile could use the 'diagnostic'
pragma push/pop feature. The src/internal.h file would
then only enable it for GCC >= 4.6

This breaks with clang which supports the pragma but
does not claim GCC 4.6 compat. Export a variable from
the m4 check to the header file so they are consistent.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2013-05-14 15:00:22 +01:00
Eric Blake
0b923ba3c8 qemu: fix bad free
Commit bd56d0d8 could lead to freeing an uninitialized pointer:

qemu/qemu_monitor_json.c: In function 'qemuMonitorJSONGetCommandLineOptionParameters':
qemu/qemu_monitor_json.c:4284: warning: 'cmd' may be used uninitialized in this function

* src/qemu/qemu_monitor_json.c
(qemuMonitorJSONGetCommandLineOptionParameters): Initialize variable.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-05-13 16:48:55 -06:00
Eric Blake
bd56d0d813 qemu: query command line options in QMP
Ever since the conversion to using only QMP for probing features
of qemu 1.2 and newer, we have been unable to detect features
that are added only by additional command line options.  For
example, we'd like to know if '-machine mem-merge=on' (added
in qemu 1.5) is present.  To do this, we will take advantage
of qemu 1.5's query-command-line-parameters QMP call [1].

This patch wires up the framework for probing the command results;
if the QMP command is missing, or if a particular command line
option does not output any parameters (for example, -net uses
a polymorphic parser, which showed up as no parameters as of qemu
1.5), we silently treat that command as having no results.

[1] https://lists.gnu.org/archive/html/qemu-devel/2013-04/msg05180.html

* src/qemu/qemu_monitor.h (qemuMonitorGetOptions)
(qemuMonitorSetOptions)
(qemuMonitorGetCommandLineOptionParameters): New functions.
* src/qemu/qemu_monitor_json.h
(qemuMonitorJSONGetCommandLineOptionParameters): Likewise.
* src/qemu/qemu_monitor.c (_qemuMonitor): Add cache field.
(qemuMonitorDispose): Clean it.
(qemuMonitorGetCommandLineOptionParameters): Implement new function.
* src/qemu/qemu_monitor_json.c
(qemuMonitorJSONGetCommandLineOptionParameters): Likewise.
(testQemuMonitorJSONGetCommandLineParameters): Test it.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-05-13 15:15:54 -06:00
Eric Blake
082274ea41 qemu: simplify string cleanup
No need to open code a string list cleanup, if we are nice
to the caller by guaranteeing a NULL-terminated result.

* src/qemu/qemu_monitor_json.c (qemuMonitorJSONGetCPUDefinitions)
(qemuMonitorJSONGetCommands, qemuMonitorJSONGetEvents)
(qemuMonitorJSONGetObjectTypes, qemuMonitorJSONGetObjectProps):
Use simpler cleanup.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-05-13 15:15:54 -06:00
Eric Blake
764bb5e5aa qemu: use bool in monitor struct
Follows on the heels of other bool cleanups, such as commit 93002b98.

* src/qemu/qemu_monitor.h (qemuMonitorOpen, qemuMonitorOpenFD):
Update json parameter type.
* src/qemu/qemu_monitor.c (qemuMonitorOpen, qemuMonitorOpenFD):
Likewise.
(_qemuMonitor): Adjust field type.
* src/qemu/qemu_domain.h (_qemuDomainObjPrivate): Likewise.
* src/qemu/qemu_domain.c (qemuDomainObjPrivateXMLParse): Adjust
client.
* src/qemu/qemu_process.c (qemuProcessStart): Likewise.
* tests/qemumonitortestutils.c (qemuMonitorTestNew): Likewise.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-05-13 15:15:54 -06:00
Eric Blake
547a7c778a json: support removing a value from an object
In an upcoming patch, I need the way to safely transfer a nested
virJSON object out of its parent container for independent use,
even after the parent is freed.

* src/util/virjson.h (virJSONValueObjectRemoveKey): New function.
(_virJSONObject, _virJSONArray): Use correct type.
* src/util/virjson.c (virJSONValueObjectRemoveKey): Implement it.
* src/libvirt_private.syms (virjson.h): Export it.
* tests/jsontest.c (mymain): Test it.

Signed-off-by: Eric Blake <eblake@redhat.com>
2013-05-13 15:15:54 -06:00