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
  23 #ifndef __BOND_ALB_H__
  24 #define __BOND_ALB_H__
  25
  26 #include <linux/if_ether.h>
  27
  28 struct bonding;
  29 struct slave;
  30
  31 #define BOND_ALB_INFO(bond)   ((bond)->alb_info)
  32 #define SLAVE_TLB_INFO(slave) ((slave)->tlb_info)
  33
  34 struct tlb_client_info {
  35         struct slave *tx_slave; /* A pointer to slave used for transmiting
  36                                  * packets to a Client that the Hash function
  37                                  * gave this entry index.
  38                                  */
  39         u32 tx_bytes;           /* Each Client acumulates the BytesTx that
  40                                  * were tranmitted to it, and after each
  41                                  * CallBack the LoadHistory is devided
  42                                  * by the balance interval
  43                                  */
  44         u32 load_history;       /* This field contains the amount of Bytes
  45                                  * that were transmitted to this client by
  46                                  * the server on the previous balance
  47                                  * interval in Bps.
  48                                  */
  49         u32 next;               /* The next Hash table entry index, assigned
  50                                  * to use the same adapter for transmit.
  51                                  */
  52         u32 prev;               /* The previous Hash table entry index,
  53                                  * assigned to use the same
  54                                  */
  55 };
  56
  57 /* -------------------------------------------------------------------------
  58  * struct rlb_client_info contains all info related to a specific rx client
  59  * connection. This is the Clients Hash Table entry struct
  60  * -------------------------------------------------------------------------
  61  */
  62 struct rlb_client_info {
  63         __be32 ip_src;          /* the server IP address */
  64         __be32 ip_dst;          /* the client IP address */
  65         u8  mac_dst[ETH_ALEN];  /* the client MAC address */
  66         u32 next;               /* The next Hash table entry index */
  67         u32 prev;               /* The previous Hash table entry index */
  68         u8  assigned;           /* checking whether this entry is assigned */
  69         u8  ntt;                /* flag - need to transmit client info */
  70         struct slave *slave;    /* the slave assigned to this client */
  71         u8 tag;                 /* flag - need to tag skb */
  72         unsigned short vlan_id; /* VLAN tag associated with IP address */
  73 };
  74
  75 struct tlb_slave_info {
  76         u32 head;       /* Index to the head of the bi-directional clients
  77                          * hash table entries list. The entries in the list
  78                          * are the entries that were assigned to use this
  79                          * slave for transmit.
  80                          */
  81         u32 load;       /* Each slave sums the loadHistory of all clients
  82                          * assigned to it
  83                          */
  84 };
  85
  86 struct alb_bond_info {
  87         struct timer_list       alb_timer;
  88         struct tlb_client_info  *tx_hashtbl; /* Dynamically allocated */
  89         spinlock_t              tx_hashtbl_lock;
  90         u32                     unbalanced_load;
  91         int                     tx_rebalance_counter;
  92         int                     lp_counter;
  93         /* -------- rlb parameters -------- */
  94         int rlb_enabled;
  95         struct packet_type      rlb_pkt_type;
  96         struct rlb_client_info  *rx_hashtbl;    /* Receive hash table */
  97         spinlock_t              rx_hashtbl_lock;
  98         u32                     rx_hashtbl_head;
  99         u8                      rx_ntt; /* flag - need to transmit
 100                                          * to all rx clients
 101                                          */
 102         struct slave            *next_rx_slave;/* next slave to be assigned
 103                                                 * to a new rx client for
 104                                                 */
 105         u32                     rlb_interval_counter;
 106         u8                      primary_is_promisc;        /* boolean */
 107         u32                     rlb_promisc_timeout_counter;/* counts primary
 108                                                              * promiscuity time
 109                                                              */
 110         u32                     rlb_update_delay_counter;
 111         u32                     rlb_update_retry_counter;/* counter of retries
 112                                                           * of client update
 113                                                           */
 114         u8                      rlb_rebalance;  /* flag - indicates that the
 115                                                  * rx traffic should be
 116                                                  * rebalanced
 117                                                  */
 118         struct vlan_entry       *current_alb_vlan;
 119 };
 120
 121 int bond_alb_initialize(struct bonding *bond, int rlb_enabled);
 122 void bond_alb_deinitialize(struct bonding *bond);
 123 int bond_alb_init_slave(struct bonding *bond, struct slave *slave);
 124 void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave);
 125 void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link);
 126 void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave);
 127 int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev);
 128 void bond_alb_monitor(struct bonding *bond);
 129 int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr);
 130 void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id);
 131 #endif /* __BOND_ALB_H__ */
 132