ceph/src/dpdk/drivers/net/bonding/rte_eth_bond_alb.h

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #ifndef RTE_ETH_BOND_ALB_H_
  35 #define RTE_ETH_BOND_ALB_H_
  36
  37 #include <rte_ether.h>
  38 #include <rte_arp.h>
  39
  40 #define ALB_HASH_TABLE_SIZE     256
  41 #define ALB_NULL_INDEX          0xFFFFFFFF
  42
  43 struct client_data {
  44         /** ARP data of single client */
  45         struct ether_addr app_mac;
  46         /**< MAC address of application running DPDK */
  47         uint32_t app_ip;
  48         /**< IP address of application running DPDK */
  49         struct ether_addr cli_mac;
  50         /**< Client MAC address */
  51         uint32_t cli_ip;
  52         /**< Client IP address */
  53
  54         uint8_t slave_idx;
  55         /**< Index of slave on which we connect with that client */
  56         uint8_t in_use;
  57         /**< Flag indicating if entry in client table is currently used */
  58         uint8_t ntt;
  59         /**< Flag indicating if we need to send update to this client on next tx */
  60
  61         struct vlan_hdr vlan[2];
  62         /**< Content of vlan headers */
  63         uint8_t vlan_count;
  64         /**< Number of nested vlan headers */
  65 };
  66
  67 struct mode_alb_private {
  68         struct client_data client_table[ALB_HASH_TABLE_SIZE];
  69         /**< Hash table storing ARP data of every client connected */
  70         struct rte_mempool *mempool;
  71         /**< Mempool for creating ARP update packets */
  72         uint8_t ntt;
  73         /**< Flag indicating if we need to send update to any client on next tx */
  74         uint32_t last_slave;
  75         /**< Index of last used slave in client table */
  76         rte_spinlock_t lock;
  77 };
  78
  79 /**
  80  * ALB mode initialization.
  81  *
  82  * @param bond_dev              Pointer to bonding device.
  83  *
  84  * @return
  85  * Error code - 0 on success.
  86  */
  87 int
  88 bond_mode_alb_enable(struct rte_eth_dev *bond_dev);
  89
  90 /**
  91  * Function handles ARP packet reception. If received ARP request, it is
  92  * forwarded to application without changes. If it is ARP reply, client table
  93  * is updated.
  94  *
  95  * @param eth_h                 ETH header of received packet.
  96  * @param offset                Vlan header offset.
  97  * @param internals             Bonding data.
  98  */
  99 void
 100 bond_mode_alb_arp_recv(struct ether_hdr *eth_h, uint16_t offset,
 101                 struct bond_dev_private *internals);
 102
 103 /**
 104  * Function handles ARP packet transmission. It also decides on which slave
 105  * send that packet. If packet is ARP Request, it is send on primary slave.
 106  * If it is ARP Reply, it is send on slave stored in client table for that
 107  * connection. On Reply function also updates data in client table.
 108  *
 109  * @param eth_h                 ETH header of transmitted packet.
 110  * @param offset                Vlan header offset.
 111  * @param internals             Bonding data.
 112  *
 113  * @return
 114  * Index of slave on which packet should be sent.
 115  */
 116 uint8_t
 117 bond_mode_alb_arp_xmit(struct ether_hdr *eth_h, uint16_t offset,
 118                 struct bond_dev_private *internals);
 119
 120 /**
 121  * Function fills packet with ARP data from client_info.
 122  *
 123  * @param client_info   Data of client to which packet is sent.
 124  * @param pkt                   Pointer to packet which is sent.
 125  * @param internals             Bonding data.
 126  *
 127  * @return
 128  * Index of slawe on which packet should be sent.
 129  */
 130 uint8_t
 131 bond_mode_alb_arp_upd(struct client_data *client_info,
 132                 struct rte_mbuf *pkt, struct bond_dev_private *internals);
 133
 134 /**
 135  * Function updates slave indexes of active connections.
 136  *
 137  * @param bond_dev              Pointer to bonded device struct.
 138  */
 139 void
 140 bond_mode_alb_client_list_upd(struct rte_eth_dev *bond_dev);
 141
 142 #endif /* RTE_ETH_BOND_ALB_H_ */