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  1. 16 12月, 2014 5 次提交
  3. 15 12月, 2014 14 次提交
  5. 14 12月, 2014 2 次提交
    • L
      qemu: add a qemuInterfaceStopDevices(), called when guest CPUs stop · c5a54917
      由 Laine Stump 提交于 
      We now have a qemuInterfaceStartDevices() which does the final
activation needed for the host-side tap/macvtap devices that are used
for qemu network connections. It will soon make sense to have the
converse qemuInterfaceStopDevices() which will undo whatever was done
during qemuInterfaceStartDevices().

A function to "stop" a single device has also been added, and is
called from the appropriate place in qemuDomainDetachNetDevice(),
although this is currently unnecessary - the device is going to
immediately be deleted anyway, so any extra "deactivation" will be for
naught. The call is included for completeness, though, in anticipation
that in the future there may be some required action that *isn't*
nullified by deleting the device.

This patch is a part of a more complete fix for:

  https://bugzilla.redhat.com/show_bug.cgi?id=1081461
      c5a54917
    • L
      qemu: always call qemuInterfaceStartDevices() when starting CPUs · 879c13d6
      由 Laine Stump 提交于 
      The patch that added qemuInterfaceStartDevices() (upstream commit
82977058) had an extra conditional to
prevent calling it if the reason for starting the CPUs was
VIR_DOMAIN_RUNNING_UNPAUSED or VIR_DOMAIN_RUNNING_SAVE_CANCELED.  This
was put in by the author as the result of a reviewer asking if it was
necessary to ifup the interfaces in *all* occasions (because these
were the two cases where the CPU would have already been started (and
stopped) once, so the interface would already be ifup'ed).

It turns out that, as long as there is no corresponding
qemuInterfaceStopDevices() to ifdown the interfaces anytime the CPUs
are stopped, neglecting to ifup when reason is RUNNING_UNPAUSED or
RUNNING_SAVE_CANCELED doesn't cause any problems (because it just
happens that the interface will have already been ifup'ed by a prior
call when the CPU was previously started for some other reason).

However, it also doesn't *help*, and there will soon be a
qemuInterfaceStopDevices() function which *will* ifdown these
interfaces when the guest CPUs are stopped, and once that is done, the
interfaces will be left down in some cases when they should be up (for
example, if a domain is paused and then unpaused).

So, this patch is removing the condition in favor of always calling
qemuInterfaeStartDevices() when the guest CPUs are started.

This patch (and the aforementioned patch) resolve:

  https://bugzilla.redhat.com/show_bug.cgi?id=1081461
      879c13d6
  7. 13 12月, 2014 3 次提交
    • M
      qemu: avoid rare race when undefining domain · c7d1c139
      由 Martin Kletzander 提交于 
      When one domain is being undefined and at the same time started, for
example, there is a possibility of a rare problem occuring.

 - Thread 1 does virDomainUndefine(), has the lock, checks that the
   domain is active and because it's not, calls
   virDomainObjListRemove().

 - Thread 2 does virDomainCreate() and tries to lock the domain.

 - Thread 1 needs to lock domain list in order to remove the domain from
   it, but must unlock domain first (proper order is to lock domain list
   first and the domain itself second).

 - Thread 2 grabs the lock, starts the domain and releases the lock.

 - Thread 1 grabs the lock and removes the domain from list.

With this patch:

 - The undefining domain gets marked as "to undefine" before it is
    unlocked.

 - If domain is found in any of the search APIs, it's returned only if
   it is not marked as "to undefine".  The check is done while the
   domain is locked.

Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1150505Signed-off-by: NMartin Kletzander <mkletzan@redhat.com>
      c7d1c139
    • L
      conf: Ignore device address for model=none usb controller and memballon · f6f4bd10
      由 Luyao Huang 提交于 
      It make no sense at all to have it there.
Signed-off-by: NLuyao Huang <lhuang@redhat.com>
      f6f4bd10
    • C
      Avoid getting '-1:-1' in devices cgroup list · 5acbb8f9
      由 Cédric Bosdonnat 提交于 
      When calling virCgroupAllowAllDevices we get these invalid entries
in the device cgroup config.
    b -1:-1 rw
    c -1:-1 rw
Check for positive values before outputting the major and minor to
avoid that.
      5acbb8f9
  9. 12 12月, 2014 1 次提交
  11. 11 12月, 2014 6 次提交
  13. 10 12月, 2014 9 次提交