From: Xiubo Li xiubli@redhat.com
[ Upstream commit e7e607bd00481745550389a29ecabe33e13d67cf ]
Flushing the dirty buffer may take a long time if the cluster is overloaded or if there is network issue. So we should ping the MDSs periodically to keep alive, else the MDS will blocklist the kclient.
Cc: stable@vger.kernel.org Link: https://tracker.ceph.com/issues/61843 Signed-off-by: Xiubo Li xiubli@redhat.com Reviewed-by: Milind Changire mchangir@redhat.com Signed-off-by: Ilya Dryomov idryomov@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/ceph/mds_client.c | 4 ++-- fs/ceph/mds_client.h | 5 +++++ fs/ceph/super.c | 10 ++++++++++ 3 files changed, 17 insertions(+), 2 deletions(-)
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index 6ceda2a4791c4..f7acf9680c9b6 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -4074,7 +4074,7 @@ static void delayed_work(struct work_struct *work)
dout("mdsc delayed_work\n");
- if (mdsc->stopping) + if (mdsc->stopping >= CEPH_MDSC_STOPPING_FLUSHED) return;
mutex_lock(&mdsc->mutex); @@ -4246,7 +4246,7 @@ static void wait_requests(struct ceph_mds_client *mdsc) void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc) { dout("pre_umount\n"); - mdsc->stopping = 1; + mdsc->stopping = CEPH_MDSC_STOPPING_BEGIN;
lock_unlock_sessions(mdsc); ceph_flush_dirty_caps(mdsc); diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h index 14c7e8c49970a..4fbbc33023c97 100644 --- a/fs/ceph/mds_client.h +++ b/fs/ceph/mds_client.h @@ -348,6 +348,11 @@ struct cap_wait { int want; };
+enum { + CEPH_MDSC_STOPPING_BEGIN = 1, + CEPH_MDSC_STOPPING_FLUSHED = 2, +}; + /* * mds client state */ diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 279334f955702..0e38678d5adda 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -1180,6 +1180,16 @@ static void ceph_kill_sb(struct super_block *s) ceph_mdsc_pre_umount(fsc->mdsc); flush_fs_workqueues(fsc);
+ /* + * Though the kill_anon_super() will finally trigger the + * sync_filesystem() anyway, we still need to do it here + * and then bump the stage of shutdown to stop the work + * queue as earlier as possible. + */ + sync_filesystem(s); + + fsc->mdsc->stopping = CEPH_MDSC_STOPPING_FLUSHED; + kill_anon_super(s);
fsc->client->extra_mon_dispatch = NULL;