From: chentao.2022 <chentao.2022@bytedance.com>
Date: Mon, 5 Aug 2024 15:38:50 +0000 (+0800)
Subject: cephfs: Fixed a bug that read operation hung in Client::get_caps when the Fc caps... 
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=93a1b5635db333542655105fba822e297ba78ac7;p=ceph.git

cephfs: Fixed a bug that read operation hung in Client::get_caps when the Fc caps is wanted but revoked by the mds, and the Fc cap refs is no-zero

Fixes: https://tracker.ceph.com/issues/65971
Signed-off-by: Tod Chen <chentao.2022@bytedance.com>

(cherry picked from commit 7f723017454957f3e4e1dbb4613bcf94afa4151e)
---

diff --git a/src/client/Client.cc b/src/client/Client.cc
index 0be0e141d2b..e05ca9aa3ae 100644
--- a/src/client/Client.cc
+++ b/src/client/Client.cc
@@ -3627,6 +3627,9 @@ void Client::put_cap_ref(Inode *in, int cap)
     if (last & CEPH_CAP_FILE_CACHE) {
       ldout(cct, 5) << __func__ << " dropped last FILE_CACHE ref on " << *in << dendl;
       ++put_nref;
+
+      ldout(cct, 10) << __func__ << " calling signal_caps_inode" << dendl;
+      signal_cond_list(in->waitfor_caps);
     }
     if (drop)
       check_caps(in, 0);