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1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
4 */
5
6#ifndef _NET_BOND_ALB_H
7#define _NET_BOND_ALB_H
8
9#include <linux/if_ether.h>
10
11struct bonding;
12struct slave;
13
14#define BOND_ALB_INFO(bond) ((bond)->alb_info)
15#define SLAVE_TLB_INFO(slave) ((slave)->tlb_info)
16
17#define ALB_TIMER_TICKS_PER_SEC 10 /* should be a divisor of HZ */
18#define BOND_TLB_REBALANCE_INTERVAL 10 /* In seconds, periodic re-balancing.
19 * Used for division - never set
20 * to zero !!!
21 */
22#define BOND_ALB_DEFAULT_LP_INTERVAL 1
23#define BOND_ALB_LP_INTERVAL(bond) (bond->params.lp_interval) /* In seconds, periodic send of
24 * learning packets to the switch
25 */
26
27#define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \
28 * ALB_TIMER_TICKS_PER_SEC)
29
30#define BOND_ALB_LP_TICKS(bond) (BOND_ALB_LP_INTERVAL(bond) \
31 * ALB_TIMER_TICKS_PER_SEC)
32
33#define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table.
34 * Note that this value MUST NOT be smaller
35 * because the key hash table is BYTE wide !
36 */
37
38
39#define TLB_NULL_INDEX 0xffffffff
40
41/* rlb defs */
42#define RLB_HASH_TABLE_SIZE 256
43#define RLB_NULL_INDEX 0xffffffff
44#define RLB_UPDATE_DELAY (2*ALB_TIMER_TICKS_PER_SEC) /* 2 seconds */
45#define RLB_ARP_BURST_SIZE 2
46#define RLB_UPDATE_RETRY 3 /* 3-ticks - must be smaller than the rlb
47 * rebalance interval (5 min).
48 */
49/* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is
50 * promiscuous after failover
51 */
52#define RLB_PROMISC_TIMEOUT (10*ALB_TIMER_TICKS_PER_SEC)
53
54
55struct tlb_client_info {
56 struct slave *tx_slave; /* A pointer to slave used for transmitting
57 * packets to a Client that the Hash function
58 * gave this entry index.
59 */
60 u32 tx_bytes; /* Each Client accumulates the BytesTx that
61 * were transmitted to it, and after each
62 * CallBack the LoadHistory is divided
63 * by the balance interval
64 */
65 u32 load_history; /* This field contains the amount of Bytes
66 * that were transmitted to this client by
67 * the server on the previous balance
68 * interval in Bps.
69 */
70 u32 next; /* The next Hash table entry index, assigned
71 * to use the same adapter for transmit.
72 */
73 u32 prev; /* The previous Hash table entry index,
74 * assigned to use the same
75 */
76};
77
78/* -------------------------------------------------------------------------
79 * struct rlb_client_info contains all info related to a specific rx client
80 * connection. This is the Clients Hash Table entry struct.
81 * Note that this is not a proper hash table; if a new client's IP address
82 * hash collides with an existing client entry, the old entry is replaced.
83 *
84 * There is a linked list (linked by the used_next and used_prev members)
85 * linking all the used entries of the hash table. This allows updating
86 * all the clients without walking over all the unused elements of the table.
87 *
88 * There are also linked lists of entries with identical hash(ip_src). These
89 * allow cleaning up the table from ip_src<->mac_src associations that have
90 * become outdated and would cause sending out invalid ARP updates to the
91 * network. These are linked by the (src_next and src_prev members).
92 * -------------------------------------------------------------------------
93 */
94struct rlb_client_info {
95 __be32 ip_src; /* the server IP address */
96 __be32 ip_dst; /* the client IP address */
97 u8 mac_src[ETH_ALEN]; /* the server MAC address */
98 u8 mac_dst[ETH_ALEN]; /* the client MAC address */
99
100 /* list of used hash table entries, starting at rx_hashtbl_used_head */
101 u32 used_next;
102 u32 used_prev;
103
104 /* ip_src based hashing */
105 u32 src_next; /* next entry with same hash(ip_src) */
106 u32 src_prev; /* prev entry with same hash(ip_src) */
107 u32 src_first; /* first entry with hash(ip_src) == this entry's index */
108
109 u8 assigned; /* checking whether this entry is assigned */
110 u8 ntt; /* flag - need to transmit client info */
111 struct slave *slave; /* the slave assigned to this client */
112 unsigned short vlan_id; /* VLAN tag associated with IP address */
113};
114
115struct tlb_slave_info {
116 u32 head; /* Index to the head of the bi-directional clients
117 * hash table entries list. The entries in the list
118 * are the entries that were assigned to use this
119 * slave for transmit.
120 */
121 u32 load; /* Each slave sums the loadHistory of all clients
122 * assigned to it
123 */
124};
125
126struct alb_bond_info {
127 struct tlb_client_info *tx_hashtbl; /* Dynamically allocated */
128 u32 unbalanced_load;
129 atomic_t tx_rebalance_counter;
130 int lp_counter;
131 /* -------- rlb parameters -------- */
132 int rlb_enabled;
133 struct rlb_client_info *rx_hashtbl; /* Receive hash table */
134 u32 rx_hashtbl_used_head;
135 u8 rx_ntt; /* flag - need to transmit
136 * to all rx clients
137 */
138 struct slave *rx_slave;/* last slave to xmit from */
139 u8 primary_is_promisc; /* boolean */
140 u32 rlb_promisc_timeout_counter;/* counts primary
141 * promiscuity time
142 */
143 u32 rlb_update_delay_counter;
144 u32 rlb_update_retry_counter;/* counter of retries
145 * of client update
146 */
147 u8 rlb_rebalance; /* flag - indicates that the
148 * rx traffic should be
149 * rebalanced
150 */
151};
152
153int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
154void bond_alb_deinitialize(struct bonding *bond);
155int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
156void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
157void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
158void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
159netdev_tx_t bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
160netdev_tx_t bond_tlb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
161struct slave *bond_xmit_alb_slave_get(struct bonding *bond,
162 struct sk_buff *skb);
163struct slave *bond_xmit_tlb_slave_get(struct bonding *bond,
164 struct sk_buff *skb);
165void bond_alb_monitor(struct work_struct *);
166int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
167void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
168#endif /* _NET_BOND_ALB_H */
169