From: "Yan, Zheng" <zheng.z.yan@xxxxxxxxx>
open_remote_ino is racy, it's possible someone deletes the inode's
last linkage while the MDS is discovering the inode.
Signed-off-by: Yan, Zheng <zheng.z.yan@xxxxxxxxx>
---
src/mds/MDCache.cc | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/src/mds/MDCache.cc b/src/mds/MDCache.cc
index 24f1109..d730ff1 100644
--- a/src/mds/MDCache.cc
+++ b/src/mds/MDCache.cc
@@ -9225,8 +9225,15 @@ void MDCache::handle_discover(MDiscover *dis)
if (dis->get_want_ino()) {
// lookup by ino
CInode *in = get_inode(dis->get_want_ino(), snapid);
- if (in && in->is_auth() && in->get_parent_dn()->get_dir() == curdir)
+ if (in && in->is_auth() && in->get_parent_dn()->get_dir() == curdir) {
dn = in->get_parent_dn();
+ if (dn->state_test(CDentry::STATE_PURGING)) {
+ // set error flag in reply
+ dout(7) << "dentry " << *dn << " is purging, flagging error ino" << dendl;
+ reply->set_flag_error_ino();
+ break;
+ }
+ }
} else if (dis->get_want().depth() > 0) {
// lookup dentry
dn = curdir->lookup(dis->get_dentry(i), snapid);
--
1.7.11.7
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