+
+int fld_server_read(const struct lu_env *env, struct lu_server_fld *fld,
+ struct lu_seq_range *range, void *data, int data_len)
+{
+ struct lu_seq_range_array *lsra = data;
+ struct fld_thread_info *info;
+ struct dt_object *dt_obj = fld->lsf_obj;
+ struct lu_seq_range *entry;
+ struct dt_it *it;
+ const struct dt_it_ops *iops;
+ int rc;
+
+ ENTRY;
+
+ lsra->lsra_count = 0;
+ iops = &dt_obj->do_index_ops->dio_it;
+ it = iops->init(env, dt_obj, 0);
+ if (IS_ERR(it))
+ RETURN(PTR_ERR(it));
+
+ rc = iops->load(env, it, range->lsr_end);
+ if (rc <= 0)
+ GOTO(out_it_fini, rc);
+
+ info = lu_context_key_get(&env->le_ctx, &fld_thread_key);
+ LASSERT(info != NULL);
+ entry = &info->fti_rec;
+ do {
+ rc = iops->rec(env, it, (struct dt_rec *)entry, 0);
+ if (rc != 0)
+ GOTO(out_it_put, rc);
+
+ if (offsetof(typeof(*lsra), lsra_lsr[lsra->lsra_count + 1]) >
+ data_len)
+ GOTO(out, rc = -EAGAIN);
+
+ range_be_to_cpu(entry, entry);
+ if (entry->lsr_index == range->lsr_index &&
+ entry->lsr_flags == range->lsr_flags &&
+ entry->lsr_start > range->lsr_start) {
+ lsra->lsra_lsr[lsra->lsra_count] = *entry;
+ lsra->lsra_count++;
+ }
+
+ rc = iops->next(env, it);
+ } while (rc == 0);
+ if (rc > 0)
+ rc = 0;
+out:
+ range_array_cpu_to_le(lsra, lsra);
+out_it_put:
+ iops->put(env, it);
+out_it_fini:
+ iops->fini(env, it);
+
+ RETURN(rc);
+}