LU-397 Set 'lsr_flags' as 'LU_SEQ_RANGE_MDT' for old 2.0 client

[fs/lustre-release.git] / lustre / fld / fld_handler.c

diff --git a/lustre/fld/fld_handler.c b/lustre/fld/fld_handler.c
index 9a30103..ae9520a 100644 (file)
--- a/lustre/fld/fld_handler.c
+++ b/lustre/fld/fld_handler.c
@@ -342,15 +342,14 @@ static int fld_server_handle(struct lu_server_fld *fld,
 static int fld_req_handle(struct ptlrpc_request *req,
                           struct fld_thread_info *info)
 {
-        struct lu_site *site;
+        struct obd_export *exp = req->rq_export;
+        struct lu_site *site = exp->exp_obd->obd_lu_dev->ld_site;
         struct lu_seq_range *in;
         struct lu_seq_range *out;
         int rc;
         __u32 *opc;
         ENTRY;
 
-        site = req->rq_export->exp_obd->obd_lu_dev->ld_site;
-
         rc = req_capsule_server_pack(info->fti_pill);
         if (rc)
                 RETURN(err_serious(rc));
@@ -365,6 +364,13 @@ static int fld_req_handle(struct ptlrpc_request *req,
                         RETURN(err_serious(-EPROTO));
                 *out = *in;
 
+                /* For old 2.0 client, the 'lsr_flags' is uninitialized.
+                 * Set it as 'LU_SEQ_RANGE_MDT' by default.
+                 * Old 2.0 liblustre client cannot talk with new 2.1 server. */
+                if (!(exp->exp_connect_flags & OBD_CONNECT_64BITHASH) &&
+                    !exp->exp_libclient)
+                        out->lsr_flags = LU_SEQ_RANGE_MDT;
+
                 rc = fld_server_handle(lu_site2md(site)->ms_server_fld,
                                        req->rq_svc_thread->t_env,
                                        *opc, out, info);