2 * Copyright (c) 2008, 2009, 2010, 2011, 2014 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.
22 #include "ofproto-provider.h"
31 /* How flows are balanced among bond slaves. */
33 BM_TCP
, /* Transport Layer Load Balance. */
34 BM_SLB
, /* Source Load Balance. */
35 BM_AB
/* Active Backup. */
38 bool bond_mode_from_string(enum bond_mode
*, const char *);
39 const char *bond_mode_to_string(enum bond_mode
);
41 /* Configuration for a bond as a whole. */
42 struct bond_settings
{
43 char *name
; /* Bond's name, for log messages. */
44 uint32_t basis
; /* Flow hashing basis. */
46 /* Balancing configuration. */
47 enum bond_mode balance
;
48 int rebalance_interval
; /* Milliseconds between rebalances.
49 Zero to disable rebalancing. */
51 /* Link status detection. */
52 int up_delay
; /* ms before enabling an up slave. */
53 int down_delay
; /* ms before disabling a down slave. */
55 bool lacp_fallback_ab_cfg
; /* Fallback to active-backup on LACP failure. */
57 struct eth_addr active_slave_mac
;
58 /* The MAC address of the interface
59 that was active during the last
63 /* Program startup. */
67 struct bond
*bond_create(const struct bond_settings
*,
68 struct ofproto_dpif
*ofproto
);
69 void bond_unref(struct bond
*);
70 struct bond
*bond_ref(const struct bond
*);
72 bool bond_reconfigure(struct bond
*, const struct bond_settings
*);
73 void bond_slave_register(struct bond
*, void *slave_
, ofp_port_t ofport
, struct netdev
*);
74 void bond_slave_set_netdev(struct bond
*, void *slave_
, struct netdev
*);
75 void bond_slave_unregister(struct bond
*, const void *slave
);
77 bool bond_run(struct bond
*, enum lacp_status
);
78 void bond_wait(struct bond
*);
80 void bond_slave_set_may_enable(struct bond
*, void *slave_
, bool may_enable
);
82 /* Special MAC learning support for SLB bonding. */
83 bool bond_should_send_learning_packets(struct bond
*);
84 struct dp_packet
*bond_compose_learning_packet(struct bond
*,
85 const struct eth_addr eth_src
,
86 uint16_t vlan
, void **port_aux
);
87 bool bond_get_changed_active_slave(const char *name
, struct eth_addr
*mac
,
90 /* Packet processing. */
92 BV_ACCEPT
, /* Accept this packet. */
93 BV_DROP
, /* Drop this packet. */
94 BV_DROP_IF_MOVED
/* Drop if we've learned a different port. */
96 enum bond_verdict
bond_check_admissibility(struct bond
*, const void *slave_
,
97 const struct eth_addr dst
);
98 void *bond_choose_output_slave(struct bond
*, const struct flow
*,
99 struct flow_wildcards
*, uint16_t vlan
);
102 void bond_account(struct bond
*, const struct flow
*, uint16_t vlan
,
104 void bond_rebalance(struct bond
*);
108 * Only balance_tcp mode uses recirculation.
110 * When recirculation is used, each bond port is assigned with a unique
111 * recirc_id. The output action to the bond port will be replaced by
112 * a Hash action, followed by a RECIRC action.
114 * ... actions= ... HASH(hash(L4)), RECIRC(recirc_id) ....
116 * On handling first output packet, 256 post recirculation flows are installed:
118 * recirc_id=<bond_recirc_id>, dp_hash=<[0..255]>/0xff, actions: output<slave>
120 * Bond module pulls stats from those post recirculation rules. If rebalancing
121 * is needed, those rules are updated with new output actions.
123 void bond_update_post_recirc_rules(struct bond
*, uint32_t *recirc_id
,
124 uint32_t *hash_basis
);