From: Adam Kupczyk <akupczyk@redhat.com>
Date: Thu, 1 Jul 2021 09:33:20 +0000 (+0200)
Subject: os/bluestore/bluefs: Weaken locks in open_for_write
X-Git-Tag: v16.2.14~23^2~29
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=c30442ad665c5a0cf38f73cf34eedbd67fd35ba3;p=ceph.git

os/bluestore/bluefs: Weaken locks in open_for_write

Signed-off-by: Adam Kupczyk <akupczyk@redhat.com>
(cherry picked from commit eac1807cf5f19dd79eb95bcb0cde80c67acb69f8)
---

diff --git a/src/os/bluestore/BlueFS.cc b/src/os/bluestore/BlueFS.cc
index 50e6f38e722..c37d95d056a 100644
--- a/src/os/bluestore/BlueFS.cc
+++ b/src/os/bluestore/BlueFS.cc
@@ -3516,7 +3516,7 @@ int BlueFS::open_for_write(
   FileWriter **h,
   bool overwrite)
 {
-  std::lock_guard nl(nodes.lock);
+  std::unique_lock nl(nodes.lock);
   dout(10) << __func__ << " " << dirname << "/" << filename << dendl;
   map<string,DirRef>::iterator p = nodes.dir_map.find(dirname);
   DirRef dir;
@@ -3578,6 +3578,7 @@ int BlueFS::open_for_write(
   dout(20) << __func__ << " mapping " << dirname << "/" << filename
 	   << " vsel_hint " << file->vselector_hint
 	   << dendl;
+  nl.unlock();
   {
     std::lock_guard ll(log.lock);
     log.t.op_file_update(file->fnode);