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mds: fix null_okay traverse logic

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This commit is contained in:
Sage Weil 2008-12-22 13:43:29 -08:00
parent 968cfc8f1b
commit e5ba5ed3ce
1 changed files with 13 additions and 4 deletions
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17
src/mds/MDCache.cc
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@ -5285,10 +5285,19 @@ int MDCache::path_traverse(MDRequest *mdr, Message *req, // who
CDentry *dn = curdir->lookup(path[depth], snapid);
// null and last_bit and xlocked by me?
if (dn && dn->is_null() && null_okay) {
dout(10) << "traverse: hit null dentry at tail of traverse, succeeding" << dendl;
trace.push_back(dn);
break; // done!
if (dn && dn->is_null()) {
if (null_okay) {
dout(10) << "traverse: hit null dentry at tail of traverse, succeeding" << dendl;
trace.push_back(dn);
break; // done!
}
if (dn->lock.is_xlocked() && dn->lock.get_xlocked_by() != mdr) {
dout(10) << "traverse: xlocked null dentry at " << *dn << dendl;
dn->lock.add_waiter(SimpleLock::WAIT_RD, _get_waiter(mdr, req));
if (mds->logger) mds->logger->inc("tlock");
return 1;
}
}
if (dn && !dn->is_null()) {