mirror of
https://github.com/openvswitch/ovs
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cf62fa4c70
Currently dp-packet make use of ofpbuf for managing packet buffers. That complicates ofpbuf, by making dp-packet independent of ofpbuf both libraries can be optimized for their own use case. This avoids mapping operation between ofpbuf and dp_packet in datapath upcalls. Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Acked-by: Jarno Rajahalme <jrajahalme@nicira.com> Acked-by: Ben Pfaff <blp@nicira.com>
127 lines
4.6 KiB
C
127 lines
4.6 KiB
C
/*
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* Copyright (c) 2008, 2009, 2010, 2011, 2014 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef BOND_H
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#define BOND_H 1
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#include <stdbool.h>
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#include <stdint.h>
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#include "ofproto-provider.h"
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#include "packets.h"
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struct flow;
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struct netdev;
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struct ofpbuf;
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struct ofproto_dpif;
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enum lacp_status;
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/* How flows are balanced among bond slaves. */
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enum bond_mode {
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BM_TCP, /* Transport Layer Load Balance. */
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BM_SLB, /* Source Load Balance. */
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BM_AB /* Active Backup. */
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};
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bool bond_mode_from_string(enum bond_mode *, const char *);
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const char *bond_mode_to_string(enum bond_mode);
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/* Configuration for a bond as a whole. */
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struct bond_settings {
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char *name; /* Bond's name, for log messages. */
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uint32_t basis; /* Flow hashing basis. */
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/* Balancing configuration. */
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enum bond_mode balance;
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int rebalance_interval; /* Milliseconds between rebalances.
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Zero to disable rebalancing. */
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/* Link status detection. */
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int up_delay; /* ms before enabling an up slave. */
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int down_delay; /* ms before disabling a down slave. */
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bool lacp_fallback_ab_cfg; /* Fallback to active-backup on LACP failure. */
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uint8_t active_slave_mac[ETH_ADDR_LEN];
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/* The MAC address of the interface
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that was active during the last
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ovs run. */
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};
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/* Program startup. */
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void bond_init(void);
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/* Basics. */
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struct bond *bond_create(const struct bond_settings *,
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struct ofproto_dpif *ofproto);
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void bond_unref(struct bond *);
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struct bond *bond_ref(const struct bond *);
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bool bond_reconfigure(struct bond *, const struct bond_settings *);
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void bond_slave_register(struct bond *, void *slave_, ofp_port_t ofport, struct netdev *);
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void bond_slave_set_netdev(struct bond *, void *slave_, struct netdev *);
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void bond_slave_unregister(struct bond *, const void *slave);
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bool bond_run(struct bond *, enum lacp_status);
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void bond_wait(struct bond *);
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void bond_slave_set_may_enable(struct bond *, void *slave_, bool may_enable);
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/* Special MAC learning support for SLB bonding. */
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bool bond_should_send_learning_packets(struct bond *);
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struct dp_packet *bond_compose_learning_packet(struct bond *,
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const uint8_t eth_src[ETH_ADDR_LEN],
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uint16_t vlan, void **port_aux);
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bool bond_get_changed_active_slave(const char *name, uint8_t mac[ETH_ADDR_LEN],
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bool force);
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/* Packet processing. */
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enum bond_verdict {
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BV_ACCEPT, /* Accept this packet. */
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BV_DROP, /* Drop this packet. */
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BV_DROP_IF_MOVED /* Drop if we've learned a different port. */
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};
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enum bond_verdict bond_check_admissibility(struct bond *, const void *slave_,
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const uint8_t dst[ETH_ADDR_LEN]);
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void *bond_choose_output_slave(struct bond *, const struct flow *,
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struct flow_wildcards *, uint16_t vlan);
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/* Rebalancing. */
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void bond_account(struct bond *, const struct flow *, uint16_t vlan,
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uint64_t n_bytes);
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void bond_rebalance(struct bond *);
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/* Recirculation
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*
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* Only balance_tcp mode uses recirculation.
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*
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* When recirculation is used, each bond port is assigned with a unique
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* recirc_id. The output action to the bond port will be replaced by
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* a Hash action, followed by a RECIRC action.
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*
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* ... actions= ... HASH(hash(L4)), RECIRC(recirc_id) ....
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*
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* On handling first output packet, 256 post recirculation flows are installed:
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*
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* recirc_id=<bond_recirc_id>, dp_hash=<[0..255]>/0xff, actions: output<slave>
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*
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* Bond module pulls stats from those post recirculation rules. If rebalancing
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* is needed, those rules are updated with new output actions.
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*/
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void bond_update_post_recirc_rules(struct bond *, const bool force);
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bool bond_may_recirc(const struct bond *, uint32_t *recirc_id,
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uint32_t *hash_bias);
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#endif /* bond.h */
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