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nwfilter: grab driver lock earlier during init (bz96649)

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This patch is in relation to Bug 966449:

https://bugzilla.redhat.com/show_bug.cgi?id=966449

This is a patch addressing the coredump.

Thread 1 must be calling  nwfilterDriverRemoveDBusMatches(). It does so with
nwfilterDriverLock held. In the patch below I am now moving the
nwfilterDriverLock(driverState) further up so that the initialization, which
seems to either take a long time or is entirely stuck, occurs with the lock
held and the shutdown cannot occur at the same time.

Remove the lock in virNWFilterDriverIsWatchingFirewallD to avoid
double-locking.

(cherry picked from commit 0ec376c20a)
This commit is contained in:
Stefan Berger 2013-06-04 14:50:20 -04:00 committed by Cole Robinson
parent 364bbdc4cc
commit 0305c271fc
1 changed files with 3 additions and 9 deletions
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12
src/nwfilter/nwfilter_driver.c
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@ -188,6 +188,8 @@ nwfilterDriverStartup(int privileged)
if (!privileged)
return 0;
nwfilterDriverLock(driverState);
if (virNWFilterIPAddrMapInit() < 0)
goto err_free_driverstate;
if (virNWFilterLearnInit() < 0)
@ -200,8 +202,6 @@ nwfilterDriverStartup(int privileged)
if (virNWFilterConfLayerInit(virNWFilterDomainFWUpdateCB) < 0)
goto err_techdrivers_shutdown;
nwfilterDriverLock(driverState);
/*
* startup the DBus late so we don't get a reload signal while
* initializing
@ -334,16 +334,10 @@ nwfilterDriverActive(void) {
bool
virNWFilterDriverIsWatchingFirewallD(void)
{
bool ret;
if (!driverState)
return false;
nwfilterDriverLock(driverState);
ret = driverState->watchingFirewallD;
nwfilterDriverUnlock(driverState);
return ret;
return driverState->watchingFirewallD;
}
/**