From 4fb782c38cb97bc8a61fce629fb9eef4fdac9292 Mon Sep 17 00:00:00 2001
From: "Yan, Zheng" <zheng.z.yan@intel.com>
Date: Sun, 30 Jun 2013 07:44:04 +0800
Subject: [PATCH] mds: fix O_TRUNC locking

When truncating a file, we should xlock the corresponding filelock.
(revoke any Fw caps from clients).

[note from sw: setattr on size also takes the filelock xlock.]

Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
---
 src/mds/Server.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/mds/Server.cc b/src/mds/Server.cc
index 627ecd0cdb7..38dad1948a4 100644
--- a/src/mds/Server.cc
+++ b/src/mds/Server.cc
@@ -2437,7 +2437,7 @@ void Server::handle_client_open(MDRequest *mdr)
 	mdr->session->have_completed_request(req->get_reqid().tid, NULL))) {
     assert(cur->is_auth());
 
-    wrlocks.insert(&cur->filelock);
+    xlocks.insert(&cur->filelock);
     if (!mds->locker->acquire_locks(mdr, rdlocks, wrlocks, xlocks))
       return;
 
-- 
2.47.3