ofproto/fail-open.h

   1 /*
   2  * Copyright (c) 2008, 2009, 2010 Nicira Networks.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef FAIL_OPEN_H
  18 #define FAIL_OPEN_H 1
  19
  20 #include <stdbool.h>
  21 #include <stdint.h>
  22 #include "flow.h"
  23
  24 struct fail_open;
  25 struct ofproto;
  26 struct rconn;
  27 struct switch_status;
  28
  29 /* Priority of the rule added by the fail-open subsystem when a switch enters
  30  * fail-open mode.  This priority value uniquely identifies a fail-open flow
  31  * (OpenFlow priorities max out at 65535 and nothing else in Open vSwitch
  32  * creates flows with this priority).  And "f0" is mnemonic for "fail open"! */
  33 #define FAIL_OPEN_PRIORITY 0xf0f0f0
  34
  35 struct fail_open *fail_open_create(struct ofproto *, struct switch_status *);
  36 void fail_open_set_controllers(struct fail_open *, struct rconn **, size_t n);
  37 void fail_open_destroy(struct fail_open *);
  38 void fail_open_wait(struct fail_open *);
  39 bool fail_open_is_active(const struct fail_open *);
  40 void fail_open_run(struct fail_open *);
  41 void fail_open_maybe_recover(struct fail_open *);
  42 void fail_open_flushed(struct fail_open *);
  43
  44 #endif /* fail-open.h */