LU-13502 lnet: Conditionally attach rspt in LNetPut & LNetGet

Create a function to interpret the message type and md options to
determine whether response tracking should be enabled for a particular
PUT or GET.

Use that function in LNetPut and LNetGet to determine whether we
attach the response tracker.

HPE-bug-id: LUS-8827
Signed-off-by: Chris Horn <hornc@cray.com>
Change-Id: Ic5f2d3dedc3e773b0ec7866cccf6db9d15dc752a
Reviewed-on: https://review.whamcloud.com/38452
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Petros Koutoupis <petros.koutoupis@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lnet/lnet/lib-move.c b/lnet/lnet/lib-move.c
index 8ef55e7..63e247c 100644 (file)
--- a/lnet/lnet/lib-move.c
+++ b/lnet/lnet/lib-move.c
@@ -69,6 +69,30 @@ lnet_msg_is_response(struct lnet_msg *msg)
        return msg->msg_type == LNET_MSG_ACK || msg->msg_type == LNET_MSG_REPLY;
 }
 
+static inline bool
+lnet_response_tracking_enabled(__u32 msg_type, unsigned int md_options)
+{
+       if (md_options & LNET_MD_NO_TRACK_RESPONSE)
+               /* Explicitly disabled in MD options */
+               return false;
+
+       if (md_options & LNET_MD_TRACK_RESPONSE)
+               /* Explicity enabled in MD options */
+               return true;
+
+       if (lnet_response_tracking == 3)
+               /* Enabled for all message types */
+               return true;
+
+       if (msg_type == LNET_MSG_PUT)
+               return lnet_response_tracking == 2;
+
+       if (msg_type == LNET_MSG_GET)
+               return lnet_response_tracking == 1;
+
+       return false;
+}
+
 static inline struct lnet_comm_count *
 get_stats_counts(struct lnet_element_stats *stats,
                 enum lnet_stats_type stats_type)
@@ -4739,7 +4763,9 @@ LNetPut(lnet_nid_t self, struct lnet_handle_md mdh, enum lnet_ack_req ack,
                               md->md_me->me_portal);
                lnet_res_unlock(cpt);
 
-               lnet_rspt_free(rspt, cpt);
+               if (rspt)
+                       lnet_rspt_free(rspt, cpt);
+
                lnet_msg_free(msg);
                return -ENOENT;
        }
@@ -4772,8 +4798,11 @@ LNetPut(lnet_nid_t self, struct lnet_handle_md mdh, enum lnet_ack_req ack,
 
        lnet_build_msg_event(msg, LNET_EVENT_SEND);
 
-       if (ack == LNET_ACK_REQ)
+       if (rspt && lnet_response_tracking_enabled(LNET_MSG_PUT,
+                                                  md->md_options))
                lnet_attach_rsp_tracker(rspt, cpt, md, mdh);
+       else if (rspt)
+               lnet_rspt_free(rspt, cpt);
 
        if (CFS_FAIL_CHECK_ORSET(CFS_FAIL_PTLRPC_OST_BULK_CB2,
                                 CFS_FAIL_ONCE))
@@ -4991,7 +5020,10 @@ LNetGet(lnet_nid_t self, struct lnet_handle_md mdh,
 
        lnet_build_msg_event(msg, LNET_EVENT_SEND);
 
-       lnet_attach_rsp_tracker(rspt, cpt, md, mdh);
+       if (lnet_response_tracking_enabled(LNET_MSG_GET, md->md_options))
+               lnet_attach_rsp_tracker(rspt, cpt, md, mdh);
+       else
+               lnet_rspt_free(rspt, cpt);
 
        rc = lnet_send(self, msg, LNET_NID_ANY);
        if (rc < 0) {