1 files changed, 54 insertions, 19 deletions

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 648a215..84b0224 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -30,8 +30,11 @@ static void __send_queued(struct ceph_osd_client *osdc);
 static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
 static void __register_request(struct ceph_osd_client *osdc,
 			       struct ceph_osd_request *req);
+static void __unregister_request(struct ceph_osd_client *osdc,
+				 struct ceph_osd_request *req);
 static void __unregister_linger_request(struct ceph_osd_client *osdc,
 					struct ceph_osd_request *req);
+static void __enqueue_request(struct ceph_osd_request *req);
 static void __send_request(struct ceph_osd_client *osdc,
 			   struct ceph_osd_request *req);
 
@@ -892,6 +895,37 @@ __lookup_request_ge(struct ceph_osd_client *osdc,
 	return NULL;
 }
 
+static void __kick_linger_request(struct ceph_osd_request *req)
+{
+	struct ceph_osd_client *osdc = req->r_osdc;
+	struct ceph_osd *osd = req->r_osd;
+
+	/*
+	 * Linger requests need to be resent with a new tid to avoid
+	 * the dup op detection logic on the OSDs.  Achieve this with
+	 * a re-register dance instead of open-coding.
+	 */
+	ceph_osdc_get_request(req);
+	if (!list_empty(&req->r_linger_item))
+		__unregister_linger_request(osdc, req);
+	else
+		__unregister_request(osdc, req);
+	__register_request(osdc, req);
+	ceph_osdc_put_request(req);
+
+	/*
+	 * Unless request has been registered as both normal and
+	 * lingering, __unregister{,_linger}_request clears r_osd.
+	 * However, here we need to preserve r_osd to make sure we
+	 * requeue on the same OSD.
+	 */
+	WARN_ON(req->r_osd || !osd);
+	req->r_osd = osd;
+
+	dout("%s requeueing %p tid %llu\n", __func__, req, req->r_tid);
+	__enqueue_request(req);
+}
+
 /*
  * Resubmit requests pending on the given osd.
  */
@@ -900,12 +934,14 @@ static void __kick_osd_requests(struct ceph_osd_client *osdc,
 {
 	struct ceph_osd_request *req, *nreq;
 	LIST_HEAD(resend);
+	LIST_HEAD(resend_linger);
 	int err;
 
-	dout("__kick_osd_requests osd%d\n", osd->o_osd);
+	dout("%s osd%d\n", __func__, osd->o_osd);
 	err = __reset_osd(osdc, osd);
 	if (err)
 		return;
+
 	/*
 	 * Build up a list of requests to resend by traversing the
 	 * osd's list of requests.  Requests for a given object are
@@ -926,33 +962,32 @@ static void __kick_osd_requests(struct ceph_osd_client *osdc,
 	list_for_each_entry(req, &osd->o_requests, r_osd_item) {
 		if (!req->r_sent)
 			break;
-		list_move_tail(&req->r_req_lru_item, &resend);
-		dout("requeueing %p tid %llu osd%d\n", req, req->r_tid,
-		     osd->o_osd);
-		if (!req->r_linger)
+
+		if (!req->r_linger) {
+			dout("%s requeueing %p tid %llu\n", __func__, req,
+			     req->r_tid);
+			list_move_tail(&req->r_req_lru_item, &resend);
 			req->r_flags |= CEPH_OSD_FLAG_RETRY;
+		} else {
+			list_move_tail(&req->r_req_lru_item, &resend_linger);
+		}
 	}
 	list_splice(&resend, &osdc->req_unsent);
 
 	/*
-	 * Linger requests are re-registered before sending, which
-	 * sets up a new tid for each.  We add them to the unsent
-	 * list at the end to keep things in tid order.
+	 * Both registered and not yet registered linger requests are
+	 * enqueued with a new tid on the same OSD.  We add/move them
+	 * to req_unsent/o_requests at the end to keep things in tid
+	 * order.
 	 */
 	list_for_each_entry_safe(req, nreq, &osd->o_linger_requests,
 				 r_linger_osd_item) {
-		/*
-		 * reregister request prior to unregistering linger so
-		 * that r_osd is preserved.
-		 */
-		BUG_ON(!list_empty(&req->r_req_lru_item));
-		__register_request(osdc, req);
-		list_add_tail(&req->r_req_lru_item, &osdc->req_unsent);
-		list_add_tail(&req->r_osd_item, &req->r_osd->o_requests);
-		__unregister_linger_request(osdc, req);
-		dout("requeued lingering %p tid %llu osd%d\n", req, req->r_tid,
-		     osd->o_osd);
+		WARN_ON(!list_empty(&req->r_req_lru_item));
+		__kick_linger_request(req);
 	}
+
+	list_for_each_entry_safe(req, nreq, &resend_linger, r_req_lru_item)
+		__kick_linger_request(req);
 }
 
 /*