drivers/net/bonding/bond_alb.h

   1 /*
   2  * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify it
   5  * under the terms of the GNU General Public License as published by the
   6  * Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  *
  18  * The full GNU General Public License is included in this distribution in the
  19  * file called LICENSE.
  20  *
  21  *
  22  * Changes:
  23  *
  24  * 2003/08/06 - Amir Noam <amir.noam at intel dot com>
  25  *      - Add support for setting bond's MAC address with special
  26  *        handling required for ALB/TLB.
  27  *
  28  * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com>
  29  *      - Code cleanup and style changes
  30  */
  31
  32 #ifndef __BOND_ALB_H__
  33 #define __BOND_ALB_H__
  34
  35 #include <linux/if_ether.h>
  36
  37 struct bonding;
  38 struct slave;
  39
  40 #define BOND_ALB_INFO(bond)   ((bond)->alb_info)
  41 #define SLAVE_TLB_INFO(slave) ((slave)->tlb_info)
  42
  43 struct tlb_client_info {
  44         struct slave *tx_slave; /* A pointer to slave used for transmiting
  45                                  * packets to a Client that the Hash function
  46                                  * gave this entry index.
  47                                  */
  48         u32 tx_bytes;           /* Each Client acumulates the BytesTx that
  49                                  * were tranmitted to it, and after each
  50                                  * CallBack the LoadHistory is devided
  51                                  * by the balance interval
  52                                  */
  53         u32 load_history;       /* This field contains the amount of Bytes
  54                                  * that were transmitted to this client by
  55                                  * the server on the previous balance
  56                                  * interval in Bps.
  57                                  */
  58         u32 next;               /* The next Hash table entry index, assigned
  59                                  * to use the same adapter for transmit.
  60                                  */
  61         u32 prev;               /* The previous Hash table entry index,
  62                                  * assigned to use the same
  63                                  */
  64 };
  65
  66 /* -------------------------------------------------------------------------
  67  * struct rlb_client_info contains all info related to a specific rx client
  68  * connection. This is the Clients Hash Table entry struct
  69  * -------------------------------------------------------------------------
  70  */
  71 struct rlb_client_info {
  72         u32 ip_src;             /* the server IP address */
  73         u32 ip_dst;             /* the client IP address */
  74         u8  mac_dst[ETH_ALEN];  /* the client MAC address */
  75         u32 next;               /* The next Hash table entry index */
  76         u32 prev;               /* The previous Hash table entry index */
  77         u8  assigned;           /* checking whether this entry is assigned */
  78         u8  ntt;                /* flag - need to transmit client info */
  79         struct slave *slave;    /* the slave assigned to this client */
  80         u8 tag;                 /* flag - need to tag skb */
  81         unsigned short vlan_id; /* VLAN tag associated with IP address */
  82 };
  83
  84 struct tlb_slave_info {
  85         u32 head;       /* Index to the head of the bi-directional clients
  86                          * hash table entries list. The entries in the list
  87                          * are the entries that were assigned to use this
  88                          * slave for transmit.
  89                          */
  90         u32 load;       /* Each slave sums the loadHistory of all clients
  91                          * assigned to it
  92                          */
  93 };
  94
  95 struct alb_bond_info {
  96         struct timer_list       alb_timer;
  97         struct tlb_client_info  *tx_hashtbl; /* Dynamically allocated */
  98         spinlock_t              tx_hashtbl_lock;
  99         u32                     unbalanced_load;
 100         int                     tx_rebalance_counter;
 101         int                     lp_counter;
 102         /* -------- rlb parameters -------- */
 103         int rlb_enabled;
 104         struct packet_type      rlb_pkt_type;
 105         struct rlb_client_info  *rx_hashtbl;    /* Receive hash table */
 106         spinlock_t              rx_hashtbl_lock;
 107         u32                     rx_hashtbl_head;
 108         u8                      rx_ntt; /* flag - need to transmit
 109                                          * to all rx clients
 110                                          */
 111         struct slave            *next_rx_slave;/* next slave to be assigned
 112                                                 * to a new rx client for
 113                                                 */
 114         u32                     rlb_interval_counter;
 115         u8                      primary_is_promisc;        /* boolean */
 116         u32                     rlb_promisc_timeout_counter;/* counts primary
 117                                                              * promiscuity time
 118                                                              */
 119         u32                     rlb_update_delay_counter;
 120         u32                     rlb_update_retry_counter;/* counter of retries
 121                                                           * of client update
 122                                                           */
 123         u8                      rlb_rebalance;  /* flag - indicates that the
 124                                                  * rx traffic should be
 125                                                  * rebalanced
 126                                                  */
 127         struct vlan_entry       *current_alb_vlan;
 128 };
 129
 130 int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
 131 void bond_alb_deinitialize(struct bonding *bond);
 132 int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
 133 void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
 134 void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
 135 void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
 136 int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
 137 void bond_alb_monitor(struct bonding *bond);
 138 int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
 139 void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
 140 #endif /* __BOND_ALB_H__ */
 141