+/*
+ * XXX: below is a copy of the functions in lustre/fld/lproc_fld.c.
+ * we want to avoid this duplication either by exporting the
+ * functions or merging fid and fld into a single module.
+ */
+static void *fldb_seq_start(struct seq_file *p, loff_t *pos)
+{
+ struct fld_seq_param *param = p->private;
+ struct lu_server_fld *fld;
+ struct dt_object *obj;
+ const struct dt_it_ops *iops;
+ struct dt_key *key;
+ int rc;
+
+ if (param == NULL || param->fsp_stop)
+ return NULL;
+
+ fld = param->fsp_fld;
+ obj = fld->lsf_obj;
+ LASSERT(obj != NULL);
+ iops = &obj->do_index_ops->dio_it;
+
+ rc = iops->load(¶m->fsp_env, param->fsp_it, *pos);
+ if (rc <= 0)
+ return NULL;
+
+ key = iops->key(¶m->fsp_env, param->fsp_it);
+ if (IS_ERR(key))
+ return NULL;
+
+ *pos = be64_to_cpu(*(__u64 *)key);
+
+ return param;
+}
+
+static void fldb_seq_stop(struct seq_file *p, void *v)
+{
+ struct fld_seq_param *param = p->private;
+ const struct dt_it_ops *iops;
+ struct lu_server_fld *fld;
+ struct dt_object *obj;
+
+ if (param == NULL)
+ return;
+
+ fld = param->fsp_fld;
+ obj = fld->lsf_obj;
+ LASSERT(obj != NULL);
+ iops = &obj->do_index_ops->dio_it;
+
+ iops->put(¶m->fsp_env, param->fsp_it);
+}
+
+static void *fldb_seq_next(struct seq_file *p, void *v, loff_t *pos)
+{
+ struct fld_seq_param *param = p->private;
+ struct lu_server_fld *fld;
+ struct dt_object *obj;
+ const struct dt_it_ops *iops;
+ int rc;
+
+ if (param == NULL || param->fsp_stop)
+ return NULL;
+
+ fld = param->fsp_fld;
+ obj = fld->lsf_obj;
+ LASSERT(obj != NULL);
+ iops = &obj->do_index_ops->dio_it;
+
+ rc = iops->next(¶m->fsp_env, param->fsp_it);
+ if (rc > 0) {
+ param->fsp_stop = 1;
+ return NULL;
+ }
+
+ *pos = be64_to_cpu(*(__u64 *)iops->key(¶m->fsp_env, param->fsp_it));
+ return param;
+}
+
+static int fldb_seq_show(struct seq_file *p, void *v)
+{
+ struct fld_seq_param *param = p->private;
+ struct lu_server_fld *fld;
+ struct dt_object *obj;
+ const struct dt_it_ops *iops;
+ struct lu_seq_range fld_rec;
+ int rc;
+
+ if (param == NULL || param->fsp_stop)
+ return 0;
+
+ fld = param->fsp_fld;
+ obj = fld->lsf_obj;
+ LASSERT(obj != NULL);
+ iops = &obj->do_index_ops->dio_it;
+
+ rc = iops->rec(¶m->fsp_env, param->fsp_it,
+ (struct dt_rec *)&fld_rec, 0);
+ if (rc != 0) {
+ CERROR("%s: read record error: rc = %d\n",
+ fld->lsf_name, rc);
+ } else if (fld_rec.lsr_start != 0) {
+ range_be_to_cpu(&fld_rec, &fld_rec);
+ seq_printf(p, DRANGE"\n", PRANGE(&fld_rec));