ovn-controller: Use new ovsdb-idl helpers to make logic more readable.

Also there were lots of 'continue's sprinkled around that didn't seem to
be needed given some simple code rearrangement.

Signed-off-by: Ben Pfaff <blp@ovn.org>
Acked-by: Ryan Moats <rmoats@us.ibm.com>

Author: blp

ovn/controller/binding.c

@@ -266,15 +266,12 @@ binding_run(struct controller_ctx *ctx, const struct ovsrec_bridge *br_int,
         process_full_binding = false;
     } else {
         SBREC_PORT_BINDING_FOR_EACH_TRACKED(binding_rec, ctx->ovnsb_idl) {
-            bool is_deleted = sbrec_port_binding_row_get_seqno(binding_rec,
-                OVSDB_IDL_CHANGE_DELETE) > 0;
-
-            if (is_deleted) {
+            if (sbrec_port_binding_is_deleted(binding_rec)) {
                 remove_local_datapath_by_binding(local_datapaths, binding_rec);
-                continue;
+            } else {
+                consider_local_datapath(ctx, &lports, chassis_rec, binding_rec,
+                                        local_datapaths);
             }
-            consider_local_datapath(ctx, &lports, chassis_rec, binding_rec,
-                                    local_datapaths);
         }
     }
 

ovn/controller/encaps.c

@@ -1,4 +1,4 @@
-/* Copyright (c) 2015 Nicira, Inc.
+/* Copyright (c) 2015, 2016 Nicira, Inc.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -404,12 +404,7 @@ encaps_run(struct controller_ctx *ctx, const struct ovsrec_bridge *br_int,
         process_full_encaps = false;
     } else {
         SBREC_CHASSIS_FOR_EACH_TRACKED (chassis_rec, ctx->ovnsb_idl) {
-            bool is_deleted = sbrec_chassis_row_get_seqno(chassis_rec,
-                                                          OVSDB_IDL_CHANGE_DELETE) > 0;
-            bool is_new = sbrec_chassis_row_get_seqno(chassis_rec,
-                                                      OVSDB_IDL_CHANGE_MODIFY) == 0;
-
-            if (is_deleted) {
+            if (sbrec_chassis_is_deleted(chassis_rec)) {
                 /* Lookup the tunnel by row uuid and remove it. */
                 struct port_hash_node *port_hash =
                     port_lookup_by_uuid(&tc.tunnel_hmap_by_uuid,
@@ -424,14 +419,10 @@ encaps_run(struct controller_ctx *ctx, const struct ovsrec_bridge *br_int,
                     free(port_hash);
                     binding_reset_processing();
                 }
-                continue;
-            }
-            if (!is_new) {
-                check_and_update_tunnel(chassis_rec);
-                continue;
-            } else {
+            } else if (sbrec_chassis_is_new(chassis_rec)) {
                 check_and_add_tunnel(chassis_rec, chassis_id);
-                continue;
+            } else {
+                check_and_update_tunnel(chassis_rec);
             }
         }
     }

ovn/controller/lport.c

@@ -107,14 +107,11 @@ lport_index_fill(struct lport_index *lports, struct ovsdb_idl *ovnsb_idl)
         full_lport_rebuild = false;
     } else {
         SBREC_PORT_BINDING_FOR_EACH_TRACKED (pb, ovnsb_idl) {
-            bool is_delete = sbrec_port_binding_row_get_seqno(pb,
-                OVSDB_IDL_CHANGE_DELETE) > 0;
-
-            if (is_delete) {
+            if (sbrec_port_binding_is_deleted(pb)) {
                 lport_index_remove(lports, &pb->header_.uuid);
-                continue;
+            } else {
+                consider_lport_index(lports, pb);
             }
-            consider_lport_index(lports, pb);
         }
     }
 }
@@ -248,14 +245,11 @@ mcgroup_index_fill(struct mcgroup_index *mcgroups, struct ovsdb_idl *ovnsb_idl)
         full_mc_rebuild = false;
     } else {
         SBREC_MULTICAST_GROUP_FOR_EACH_TRACKED (mg, ovnsb_idl) {
-            bool is_delete = sbrec_multicast_group_row_get_seqno(mg,
-                OVSDB_IDL_CHANGE_DELETE) > 0;
-
-            if (is_delete) {
+            if (sbrec_multicast_group_is_deleted(mg)) {
                 mcgroup_index_remove(mcgroups, &mg->header_.uuid);
-                continue;
+            } else {
+                consider_mcgroup_index(mcgroups, mg);
             }
-            consider_mcgroup_index(mcgroups, mg);
         }
     }
 }

ovsdb/ovsdb-idlc.in

@@ -186,6 +186,18 @@ const struct %(s)s *%(s)s_track_get_next(const struct %(s)s *);
              (ROW); \\
              (ROW) = %(s)s_track_get_next(ROW))
 
+/* Returns true if 'row' was inserted since the last change tracking reset. */
+static inline bool %(s)s_is_new(const struct %(s)s *row)
+{
+    return %(s)s_row_get_seqno(row, OVSDB_IDL_CHANGE_MODIFY) == 0;
+}
+
+/* Returns true if 'row' was deleted since the last change tracking reset. */
+static inline bool %(s)s_is_deleted(const struct %(s)s *row)
+{
+    return %(s)s_row_get_seqno(row, OVSDB_IDL_CHANGE_DELETE) > 0;
+}
+
 void %(s)s_init(struct %(s)s *);
 void %(s)s_delete(const struct %(s)s *);
 struct %(s)s *%(s)s_insert(struct ovsdb_idl_txn *);