lib/cfm.h

   1 /* Copyright (c) 2010, 2011 Nicira, Inc.
   2  *
   3  * Licensed under the Apache License, Version 2.0 (the "License");
   4  * you may not use this file except in compliance with the License.
   5  * You may obtain a copy of the License at:
   6  *
   7  *     http://www.apache.org/licenses/LICENSE-2.0
   8  *
   9  * Unless required by applicable law or agreed to in writing, software
  10  * distributed under the License is distributed on an "AS IS" BASIS,
  11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12  * See the License for the specific language governing permissions and
  13  * limitations under the License.
  14  */
  15
  16 #ifndef CFM_H
  17 #define CFM_H 1
  18
  19 #include <stdint.h>
  20
  21 #include "hmap.h"
  22 #include "openvswitch/types.h"
  23
  24 struct flow;
  25 struct ofpbuf;
  26 struct netdev;
  27
  28 #define CFM_RANDOM_VLAN UINT16_MAX
  29
  30 #define CFM_FAULT_REASONS                  \
  31     CFM_FAULT_REASON(RECV, recv)           \
  32     CFM_FAULT_REASON(RDI, rdi)             \
  33     CFM_FAULT_REASON(MAID, maid)           \
  34     CFM_FAULT_REASON(LOOPBACK, loopback)   \
  35     CFM_FAULT_REASON(OVERFLOW, overflow)   \
  36     CFM_FAULT_REASON(OVERRIDE, override)   \
  37     CFM_FAULT_REASON(INTERVAL, interval)
  38
  39 enum cfm_fault_bit_index {
  40 #define CFM_FAULT_REASON(NAME, STR) CFM_FAULT_INDEX_##NAME,
  41     CFM_FAULT_REASONS
  42 #undef CFM_FAULT_REASON
  43     CFM_FAULT_N_REASONS
  44 };
  45
  46 enum cfm_fault_reason {
  47 #define CFM_FAULT_REASON(NAME, STR) \
  48     CFM_FAULT_##NAME = 1 << CFM_FAULT_INDEX_##NAME,
  49     CFM_FAULT_REASONS
  50 #undef CFM_FAULT_REASON
  51 };
  52
  53 struct cfm_settings {
  54     uint64_t mpid;              /* The MPID of this CFM. */
  55     int interval;               /* The requested transmission interval. */
  56     bool extended;              /* Run in extended mode. */
  57     bool demand;                /* Run in demand mode. */
  58     bool opup;                  /* Operational State. */
  59     uint16_t ccm_vlan;          /* CCM Vlan tag. Zero if none.
  60                                    CFM_RANDOM_VLAN if random. */
  61     uint8_t ccm_pcp;            /* CCM Priority. Zero if none. */
  62
  63     bool check_tnl_key;         /* Verify inbound packet key? */
  64 };
  65
  66 void cfm_init(void);
  67 struct cfm *cfm_create(const struct netdev *);
  68 void cfm_destroy(struct cfm *);
  69 void cfm_run(struct cfm *);
  70 bool cfm_should_send_ccm(struct cfm *);
  71 void cfm_compose_ccm(struct cfm *, struct ofpbuf *packet, uint8_t eth_src[6]);
  72 void cfm_wait(struct cfm *);
  73 bool cfm_configure(struct cfm *, const struct cfm_settings *);
  74 bool cfm_should_process_flow(const struct cfm *cfm, const struct flow *);
  75 void cfm_process_heartbeat(struct cfm *, const struct ofpbuf *packet);
  76 int cfm_get_fault(const struct cfm *);
  77 int cfm_get_health(const struct cfm *);
  78 int cfm_get_opup(const struct cfm *);
  79 void cfm_get_remote_mpids(const struct cfm *, const uint64_t **rmps,
  80                           size_t *n_rmps);
  81 const char *cfm_fault_reason_to_str(int fault);
  82
  83 #endif /* cfm.h */