2 * Copyright (c) 2008, 2009, 2010, 2011 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
30 /* How flows are balanced among bond slaves. */
32 BM_TCP, /* Transport Layer Load Balance. */
33 BM_SLB, /* Source Load Balance. */
34 BM_AB /* Active Backup. */
37 bool bond_mode_from_string(enum bond_mode *, const char *);
38 const char *bond_mode_to_string(enum bond_mode);
40 /* Configuration for a bond as a whole. */
41 struct bond_settings {
42 char *name; /* Bond's name, for log messages. */
43 uint32_t basis; /* Flow hashing basis. */
45 /* Balancing configuration. */
46 enum bond_mode balance;
47 int rebalance_interval; /* Milliseconds between rebalances.
48 Zero to disable rebalancing. */
50 /* Link status detection. */
51 int up_delay; /* ms before enabling an up slave. */
52 int down_delay; /* ms before disabling a down slave. */
54 /* Legacy compatibility. */
55 bool fake_iface; /* Update fake stats for netdev 'name'? */
56 bool lacp_fallback_ab_cfg; /* Fallback to active-backup on LACP failure. */
59 /* Program startup. */
63 struct bond *bond_create(const struct bond_settings *);
64 void bond_unref(struct bond *);
65 struct bond *bond_ref(const struct bond *);
67 bool bond_reconfigure(struct bond *, const struct bond_settings *);
68 void bond_slave_register(struct bond *, void *slave_, struct netdev *);
69 void bond_slave_set_netdev(struct bond *, void *slave_, struct netdev *);
70 void bond_slave_unregister(struct bond *, const void *slave);
72 bool bond_run(struct bond *, enum lacp_status);
73 void bond_wait(struct bond *);
75 void bond_slave_set_may_enable(struct bond *, void *slave_, bool may_enable);
77 /* Special MAC learning support for SLB bonding. */
78 bool bond_should_send_learning_packets(struct bond *);
79 struct ofpbuf *bond_compose_learning_packet(struct bond *,
80 const uint8_t eth_src[ETH_ADDR_LEN],
81 uint16_t vlan, void **port_aux);
83 /* Packet processing. */
85 BV_ACCEPT, /* Accept this packet. */
86 BV_DROP, /* Drop this packet. */
87 BV_DROP_IF_MOVED /* Drop if we've learned a different port. */
89 enum bond_verdict bond_check_admissibility(struct bond *, const void *slave_,
90 const uint8_t dst[ETH_ADDR_LEN]);
91 void *bond_choose_output_slave(struct bond *, const struct flow *,
92 struct flow_wildcards *, uint16_t vlan);
95 void bond_account(struct bond *, const struct flow *, uint16_t vlan,
97 void bond_rebalance(struct bond *);