Reviewed-by: Greg Farnum <greg@xxxxxxxxxxx> Software Engineer #42 @ http://inktank.com | http://ceph.com On Sunday, March 17, 2013 at 7:51 AM, Yan, Zheng wrote: > From: "Yan, Zheng" <zheng.z.yan@xxxxxxxxx (mailto:zheng.z.yan@xxxxxxxxx)> > > There are cases that need both create new bound and swallow intervening > subtree. For example: A MDS exports subtree A with bound B and imports > subtree B with bound C at the same time. The MDS crashes, exporting > subtree A fails, but importing subtree B succeed. During recovery, the > MDS may create new bound C and swallow subtree B. > > Signed-off-by: Yan, Zheng <zheng.z.yan@xxxxxxxxx (mailto:zheng.z.yan@xxxxxxxxx)> > --- > src/mds/MDCache.cc (http://MDCache.cc) | 10 ++++++++-- > 1 file changed, 8 insertions(+), 2 deletions(-) > > diff --git a/src/mds/MDCache.cc (http://MDCache.cc) b/src/mds/MDCache.cc (http://MDCache.cc) > index 684e70b..19dc60b 100644 > --- a/src/mds/MDCache.cc (http://MDCache.cc) > +++ b/src/mds/MDCache.cc (http://MDCache.cc) > @@ -980,15 +980,21 @@ void MDCache::adjust_bounded_subtree_auth(CDir *dir, set<CDir*>& bounds, pair<in > } > else { > dout(10) << " want bound " << *bound << dendl; > + CDir *t = get_subtree_root(bound->get_parent_dir()); > + if (subtrees[t].count(bound) == 0) { > + assert(t != dir); > + dout(10) << " new bound " << *bound << dendl; > + adjust_subtree_auth(bound, t->authority()); > + } > // make sure it's nested beneath ambiguous subtree(s) > while (1) { > - CDir *t = get_subtree_root(bound->get_parent_dir()); > - if (t == dir) break; > while (subtrees[dir].count(t) == 0) > t = get_subtree_root(t->get_parent_dir()); > dout(10) << " swallowing intervening subtree at " << *t << dendl; > adjust_subtree_auth(t, auth); > try_subtree_merge_at(t); > + t = get_subtree_root(bound->get_parent_dir()); > + if (t == dir) break; > } > } > } > -- > 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
