While we have a wiki page describing the feature [1] since the
feature is distributed in our .tar.gz we ought to document it. So
I went ahead, copied the wiki page and reformatted so it fits our
docs coding style.

1: http://wiki.libvirt.org/page/NSS_moduleSigned-off-by: NMichal Privoznik <mprivozn@redhat.com>

If the pool creation thread happens to detect the luns in
the scsi target, the size parameters will be calculated as
part of the refreshPool called from storagePoolCreate().

This means the virStoragePoolFCRefreshThread (commit id
'512b8747') waiting to run and "refresh" the pool will
essentially double the allocation and capacity values.
A separate refresh would correct the values.

To avoid this, the FCRefreshThread needs to reinitialize
the pool size values prior to calling virStorageBackendSCSIFindLUs
which eventually calls virStorageBackendSCSINewLun and
updates the size values for each volume found.

After the recent commits the build didn't work for me. Fix it by
using size_t as the callback argument is using and the correct
formatter. The attempted fixup to use %llu as a formatter was wrong.

Commit e6336442 changed the 'out:' label to 'cleanup'  in
libxlDomainAttachNetDevice(), but missed a comment referencing
the 'out:' label. Remove it from the comment since it is no
longer accurate anyhow.

Use virGetLastErrorMessage() rather than open code it

- remove top padding for h1. this means page titles sit flush with the top
  of the side bar (like 'The virtualization API' on the front page)
- up the top padding for the remaining sections. makes it visually easier
  to tell adjacent header sections apart, especially in dense wiki pages
- use two different spacing levels for h2-h4 and h5-h6,
  gives pages some more visual flexibility
- use a slightly lower bottom padding... this makes top padding stick out
  more which makes it visually easier to differentiate between adjacent
  header sections

In order to follow recent comments which indicate support for specific
feature bits are supported by a specific QEMU version add the version
from whence the relaxed, vapic, and spinlocks support was added.

This patch adds support for "vpindex", "runtime", "synic",
"stimer", and "vendor_id" features available in qemu 2.5+.

- When Hyper-V "vpindex" is on, guest can use MSR HV_X64_MSR_VP_INDEX
to get virtual processor ID.

- Hyper-V "runtime" enlightement feature allows to use MSR
HV_X64_MSR_VP_RUNTIME to get the time the virtual processor consumes
running guest code, as well as the time the hypervisor spends running
code on behalf of that guest.

- Hyper-V "synic" stands for Synthetic Interrupt Controller, which is
lapic extension controlled via MSRs.

- Hyper-V "stimer" switches on Hyper-V SynIC timers MSR's support.
Guest can setup and use fired by host events (SynIC interrupt and
appropriate timer expiration message) as guest clock events

- Hyper-V "reset" allows guest to reset VM.

- Hyper-V "vendor_id" exposes hypervisor vendor id to guest.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

1. All hyperv features are tristate ones. So make tristate generating part common.
2. Reduce nesting on spinlocks.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

1. All hyperv features are tristate ones. So make tristate parsing code common.
2. Reindent switch statement.
3. Reduce nesting in spinlocks parsing.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>
Signed-off-by: NJohn Ferlan <jferlan@redhat.com>

After the patches that added tracking of in-use macvtap names (commit
370608, first appearing in libvirt-1.3.2), if the function to allocate
a new macvtap device came to a device name created outside libvirt, it
would retry the same device name MACVLAN_MAX_ID (8191) times before
finally giving up in failure.

The problem was that virBitmapNextClearBit was always being called
with "0" rather than the value most recently checked (which would
increment each time through the loop), so it would always return the
same id (since we dutifully release that id after failing to create a
new device using it).

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1321546Signed-off-by: NLaine Stump <laine@laine.org>

For those VF allocated from a network pool, we need to set its backend
to be VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN so that later work can be
correct.
Signed-off-by: NChunyan Liu <cyliu@suse.com>

This test was commited 4 years ago, but was never enabled in
storagepoolxml2xmltest.c. This patch reactivates it, conditionnaly on RBD
storage support being enabled

This test failed for two reasons:
* The uuid was missing from the input file
* The output file had the <name> in a different place from the actual output

This reverts commit bb5f2dc9.

The "if (vol->target.format != VIR_STORAGE_FILE_RAW)" check in the
createVol backend. This check is bogus because virStorageVolDefParseXML()
in conf/storage_conf.c sets target.format only if volOptions in
virStoragePoolTypeInfo has formatFromString set, and that's not the
case the zfs backend.

So the check always fails and breaks volume creation.

This reverts commit 6682d621.

The "if (vol->target.format != VIR_STORAGE_FILE_RAW)" check in the
createVol backend. This check is bogus because virStorageVolDefParseXML()
in conf/storage_conf.c sets target.format only if volOptions in
virStoragePoolTypeInfo has formatFromString set, and that's not the
case the logical backend.

So the check always fails and breaks volume creation.

When hostdev parent is network device, should call
libxlDomainDetachNetDevice to detach the device from a higher level.
Signed-off-by: NChunyan Liu <cyliu@suse.com>

Adjust codes to make it cleaner.
Signed-off-by: NChunyan Liu <cyliu@suse.com>

When AttachNetDevice failed, should call networkReleaseActualDevice
to release actual device, and if actual device is hostdev, should
remove the hostdev from vm->def->hostdevs.
Signed-off-by: NChunyan Liu <cyliu@suse.com>

networkStartNetwork() and networkShutdownNetwork() were calling the
wrong type-specific function in the case of networks that were
configured for macvtap ("direct") bridge mode - they were instead
calling the functions for a tap+bridge network. Currently none of
these functions does anything (they just return 0) so it hasn't
created any problems, but that could change in the future.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1316465

An attempt to simplify the code for the VIR_NETWORK_FORWARD_BRIDGE
case of networkUpdateState in commit b61db335 (first in release
1.2.14) resulted in networks based on macvtap bridge mode being
erroneously marked as inactive any time libvirtd was restarted.

The problem is that the original code had differentiated between a
network using tap devices to connect to an existing host-bridge device
(forward mode of VIR_NETWORK_FORWARD_BRIDGE and a non-NULL
def->bridge), and one using macvtap bridge mode to connect to any
ethernet device (still forward mode VIR_NETWORK_FORWARD_BRIDGE, but
null def->bridge), but the changed code assumed that all networks with
VIR_NETWORK_FORWARD_BRIDGE were tap + host-bridge networks, so a null
def->bridge was interpreted as "inactive".

This patch restores the original code in networkUpdateState

This changes __VIT_TEST_UTILS_H__ to __VIR_TEST_UTILS_H__

%zu is for size_t variables, not uint64 ones. This causes a warning when building on
a 32 bit linux.

If the abs_builddir path already is in PATH and it's in the first
position, due to a bug in our code PATH would be cleared out.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

In 68b726b9 we tried to fix a mem leak. However, it
wasn't done quite well. Problem is, virNetDaemonGetServers() may
fail in which case virObjectListFreeCount() would be called with
-1 objects to free. But the number of elements is taken in
unsigned rather than signed integer.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

qemuStateInitialize uses a mix of VIR_ERROR and standard vir*Error
calls. Prefer the standard vir*Error

These uses of virGetLastError message are just duplicating
virGetLastErrorMessage.

Coverity pointed out that getenv("PATH") may return NULL. Well,
we check for that in virFindFileInPath() too. If this happens, we
will pass NULL into strstr(). Ouch.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

The variable is dereferenced prior its check for NULL. The check
itself does not make much sense anyway - it's our test, we know
we are not passing NULL.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Patch 0b231195 refactored logging output parser to make it more readable.
This patch does similar thing to logging filter parser.

The test can return positive value even though it should have failed. It just
returns the value parser returned, which should be flipped back to -1 if
something went wrong or the result was unexpected, but it isn't.

If caller of adminConnectListServers() pass NULL instead of servers we
need to free the list we've received from virNetDaemonGetServers().
Signed-off-by: NPavel Hrdina <phrdina@redhat.com>

The adminDispatchConnectListServers() function is generated by
our great perl script. However, it has a tiny flaw: if
adminConnectListServers() it calls fails, the control jumps onto
cleanup label where we try to free any list of servers built so
far. However, in the loop @i is unsigned (size_t) while @nresults
is signed (int). Currently, it does no harm because of the check
for @result being non-NULL. But if that ever changes in the
future, this bug will be hard to chase.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

In an unlikely event of virConnectRegisterCloseCallback failing,
the error is ignored. This is an example file and we shouldn't
get a bad example.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

Like in the rest of our code we tend to prefer 'goto' and
'cleanup' over 'if else' code structure. Do the same here.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

After 9c17d665 the tap device for ethernet network type is
automatically precreated before spawning qemu. Problem is, the
qemuxml2argvtest wasn't updated and thus is failing. Because of
all the APIs that new code is calling, I had to mock a lot. Also,
since the tap FDs are labeled separately from the rest of the
devices/files I had to enable NOP security driver for the test
too.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

We were printing the wrong MAX value

When constructing SCSI hostdev command line for qemu, the
/sys/bus/scsi/devices/... dir is scanned. Unfortunately, even in
the tests. This is needed to determine the name of SCSI device to
passthrough to qemu, because in the domain XML we were given its
address instead. Anyway, we should not be touching live system
data in our test suite as it produced unpredictable results. The
test is regressing from 1e9a0837 on.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>

If a user specify network type ethernet, then create it via libvirt and run
script if it provided. After this commit user does not need to
run external script to create tap device or add root permissions to qemu
process.
Signed-off-by: NVasiliy Tolstov <v.tolstov@selfip.ru>