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.
31 /* How flows are balanced among bond slaves. */
33 BM_TCP, /* Transport Layer Load Balance. */
34 BM_SLB, /* Source Load Balance. */
35 BM_STABLE, /* Stable. */
36 BM_AB /* Active Backup. */
39 bool bond_mode_from_string(enum bond_mode *, const char *);
40 const char *bond_mode_to_string(enum bond_mode);
42 /* Configuration for a bond as a whole. */
43 struct bond_settings {
44 char *name; /* Bond's name, for log messages. */
45 uint32_t basis; /* Flow hashing basis. */
47 /* Balancing configuration. */
48 enum bond_mode balance;
49 int rebalance_interval; /* Milliseconds between rebalances.
50 Zero to disable rebalancing. */
52 /* Link status detection. */
53 int up_delay; /* ms before enabling an up slave. */
54 int down_delay; /* ms before disabling a down slave. */
56 /* Legacy compatibility. */
57 bool fake_iface; /* Update fake stats for netdev 'name'? */
60 /* Program startup. */
64 struct bond *bond_create(const struct bond_settings *);
65 void bond_destroy(struct bond *);
67 bool bond_reconfigure(struct bond *, const struct bond_settings *);
68 void bond_slave_register(struct bond *, void *slave_,
69 uint32_t stable_id, struct netdev *);
70 void bond_slave_set_netdev(struct bond *, void *slave_, struct netdev *);
71 void bond_slave_unregister(struct bond *, const void *slave);
73 void bond_run(struct bond *, struct tag_set *, enum lacp_status);
74 void bond_wait(struct bond *);
76 void bond_slave_set_may_enable(struct bond *, void *slave_, bool may_enable);
78 /* Special MAC learning support for SLB bonding. */
79 bool bond_should_send_learning_packets(struct bond *);
80 struct ofpbuf *bond_compose_learning_packet(struct bond *,
81 const uint8_t eth_src[ETH_ADDR_LEN],
82 uint16_t vlan, void **port_aux);
84 /* Packet processing. */
86 BV_ACCEPT, /* Accept this packet. */
87 BV_DROP, /* Drop this packet. */
88 BV_DROP_IF_MOVED /* Drop if we've learned a different port. */
90 enum bond_verdict bond_check_admissibility(struct bond *, const void *slave_,
91 const uint8_t eth_dst[ETH_ADDR_LEN],
93 void *bond_choose_output_slave(struct bond *,
94 const struct flow *, uint16_t vlan, tag_type *);
97 void bond_account(struct bond *, const struct flow *, uint16_t vlan,
99 void bond_rebalance(struct bond *, struct tag_set *);