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ceph: defer stopping mdsc delayed_work

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commit e7e607bd00481745550389a29ecabe33e13d67cf upstream.

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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Xiubo Li 2023-07-25 12:03:59 +08:00 committed by Greg Kroah-Hartman
parent b5b39ff691
commit a4b2673e3c
3 changed files with 17 additions and 2 deletions
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4
fs/ceph/mds_client.c
View File

@ -4511,7 +4511,7 @@ 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);
@ -4701,7 +4701,7 @@ void send_flush_mdlog(struct ceph_mds_session *s)
void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc)
{
dout("pre_umount\n");
mdsc->stopping = 1;
mdsc->stopping = CEPH_MDSC_STOPPING_BEGIN;
ceph_mdsc_iterate_sessions(mdsc, send_flush_mdlog, true);
ceph_mdsc_iterate_sessions(mdsc, lock_unlock_session, false);

5
fs/ceph/mds_client.h
View File

@ -372,6 +372,11 @@ struct cap_wait {
int want;
};
enum {
CEPH_MDSC_STOPPING_BEGIN = 1,
CEPH_MDSC_STOPPING_FLUSHED = 2,
};
/*
* mds client state
*/

10
fs/ceph/super.c
View File

@ -1222,6 +1222,16 @@ 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;