LU-10193 osd-zfs: backup index object with plain format

[fs/lustre-release.git] / lustre / mgs / mgs_fs.c

diff --git a/lustre/mgs/mgs_fs.c b/lustre/mgs/mgs_fs.c
index 4eefeda..0ccd4c4 100644 (file)
--- a/lustre/mgs/mgs_fs.c
+++ b/lustre/mgs/mgs_fs.c
@@ -222,6 +222,26 @@ out:
 
 int mgs_fs_cleanup(const struct lu_env *env, struct mgs_device *mgs)
 {
+       struct lustre_cfg_bufs bufs;
+       struct lustre_cfg *lcfg;
+
+       /* For the MGS on independent device from MDT, it notifies the lower
+        * layer OSD to backup index before the umount via LCFG_PRE_CLEANUP. */
+       lustre_cfg_bufs_reset(&bufs, mgs->mgs_obd->obd_name);
+       lustre_cfg_bufs_set_string(&bufs, 1, NULL);
+       OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
+       if (!lcfg) {
+               CERROR("%s: failed to trigger LCFG_PRE_CLEANUP\n",
+                      mgs->mgs_obd->obd_name);
+       } else {
+               struct lu_device *l = &mgs->mgs_bottom->dd_lu_dev;
+
+               lustre_cfg_init(lcfg, LCFG_PRE_CLEANUP, &bufs);
+               l->ld_ops->ldo_process_config(env, l, lcfg);
+               OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount,
+                                             lcfg->lcfg_buflens));
+       }
+
        if (mgs->mgs_configs_dir) {
                dt_object_put(env, mgs->mgs_configs_dir);
                mgs->mgs_configs_dir = NULL;