ceph: initialize sb->s_bdi, bdi_unregister after kill_anon_super
Writeback doesn't work without the bdi set, and writeback on
umount doesn't work if we unregister the bdi too early.
Signed-off-by: Sage Weil <sage@newdream.net>
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 442a990..7f7d475 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -97,6 +97,7 @@
dout("sync_fs %d\n", wait);
ceph_osdc_sync(&ceph_client(sb)->osdc);
ceph_mdsc_sync(&ceph_client(sb)->mdsc);
+ dout("sync_fs %d done\n", wait);
return 0;
}
@@ -777,6 +778,7 @@
err = bdi_init(&client->backing_dev_info);
if (err < 0)
return err;
+ sb->s_bdi = &client->backing_dev_info;
/* set ra_pages based on rsize mount option? */
if (client->mount_args.rsize >= PAGE_CACHE_SIZE)
@@ -861,8 +863,8 @@
struct ceph_client *client = ceph_sb_to_client(s);
dout("kill_sb %p\n", s);
ceph_mdsc_pre_umount(&client->mdsc);
- bdi_unregister(&client->backing_dev_info);
kill_anon_super(s); /* will call put_super after sb is r/o */
+ bdi_unregister(&client->backing_dev_info);
bdi_destroy(&client->backing_dev_info);
ceph_destroy_client(client);
}