src/network/networkd-netdev-bond.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4     This file is part of systemd.
   5
   6     Copyright 2014  Tom Gundersen <teg@jklm.no>
   7     Copyright 2014  Susant Sahani
   8
   9     systemd is free software; you can redistribute it and/or modify it
  10     under the terms of the GNU Lesser General Public License as published by
  11     the Free Software Foundation; either version 2.1 of the License, or
  12     (at your option) any later version.
  13
  14     systemd is distributed in the hope that it will be useful, but
  15     WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  17     Lesser General Public License for more details.
  18
  19     You should have received a copy of the GNU Lesser General Public License
  20     along with systemd; If not, see <http://www.gnu.org/licenses/>.
  21 ***/
  22
  23 #include <netinet/ether.h>
  24 #include <arpa/inet.h>
  25 #include <linux/if_bonding.h>
  26
  27 #include "conf-parser.h"
  28 #include "sd-rtnl.h"
  29 #include "networkd-netdev-bond.h"
  30 #include "missing.h"
  31
  32 static const char* const bond_mode_table[_NETDEV_BOND_MODE_MAX] = {
  33         [NETDEV_BOND_MODE_BALANCE_RR] = "balance-rr",
  34         [NETDEV_BOND_MODE_ACTIVE_BACKUP] = "active-backup",
  35         [NETDEV_BOND_MODE_BALANCE_XOR] = "balance-xor",
  36         [NETDEV_BOND_MODE_BROADCAST] = "broadcast",
  37         [NETDEV_BOND_MODE_802_3AD] = "802.3ad",
  38         [NETDEV_BOND_MODE_BALANCE_TLB] = "balance-tlb",
  39         [NETDEV_BOND_MODE_BALANCE_ALB] = "balance-alb",
  40 };
  41
  42 DEFINE_STRING_TABLE_LOOKUP(bond_mode, BondMode);
  43 DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_mode, bond_mode, BondMode, "Failed to parse bond mode");
  44
  45
  46 static const char* const bond_xmit_hash_policy_table[_NETDEV_BOND_XMIT_HASH_POLICY_MAX] = {
  47         [NETDEV_BOND_XMIT_HASH_POLICY_LAYER2] = "layer2",
  48         [NETDEV_BOND_XMIT_HASH_POLICY_LAYER34] = "layer3+4",
  49         [NETDEV_BOND_XMIT_HASH_POLICY_LAYER23] = "layer2+3",
  50         [NETDEV_BOND_XMIT_HASH_POLICY_ENCAP23] = "encap2+3",
  51         [NETDEV_BOND_XMIT_HASH_POLICY_ENCAP34] = "encap3+4",
  52 };
  53
  54 DEFINE_STRING_TABLE_LOOKUP(bond_xmit_hash_policy, BondXmitHashPolicy);
  55 DEFINE_CONFIG_PARSE_ENUM(config_parse_bond_xmit_hash_policy,
  56                          bond_xmit_hash_policy,
  57                          BondXmitHashPolicy,
  58                          "Failed to parse bond transmit hash policy")
  59
  60 static uint8_t bond_mode_to_kernel(BondMode mode) {
  61         switch (mode) {
  62         case NETDEV_BOND_MODE_BALANCE_RR:
  63                 return BOND_MODE_ROUNDROBIN;
  64         case NETDEV_BOND_MODE_ACTIVE_BACKUP:
  65                 return BOND_MODE_ACTIVEBACKUP;
  66         case NETDEV_BOND_MODE_BALANCE_XOR:
  67                 return BOND_MODE_XOR;
  68         case NETDEV_BOND_MODE_BROADCAST:
  69                 return BOND_MODE_BROADCAST;
  70         case NETDEV_BOND_MODE_802_3AD:
  71                 return BOND_MODE_8023AD;
  72         case NETDEV_BOND_MODE_BALANCE_TLB:
  73                 return BOND_MODE_TLB;
  74         case NETDEV_BOND_MODE_BALANCE_ALB:
  75                 return BOND_MODE_ALB;
  76         default:
  77                 return (uint8_t) -1;
  78         }
  79 }
  80
  81 static uint8_t bond_xmit_hash_policy_to_kernel(BondXmitHashPolicy policy) {
  82         switch (policy) {
  83         case NETDEV_BOND_XMIT_HASH_POLICY_LAYER2:
  84                 return BOND_XMIT_POLICY_LAYER2;
  85         case NETDEV_BOND_XMIT_HASH_POLICY_LAYER34:
  86                 return BOND_XMIT_POLICY_LAYER34;
  87         case NETDEV_BOND_XMIT_HASH_POLICY_LAYER23:
  88                 return BOND_XMIT_POLICY_LAYER23;
  89         case NETDEV_BOND_XMIT_HASH_POLICY_ENCAP23:
  90                 return BOND_XMIT_POLICY_ENCAP23;
  91         case NETDEV_BOND_XMIT_HASH_POLICY_ENCAP34:
  92                 return BOND_XMIT_POLICY_ENCAP34;
  93         default:
  94                 return (uint8_t) -1;
  95         }
  96 }
  97
  98 static int netdev_bond_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_message *m) {
  99         Bond *b = BOND(netdev);
 100         int r;
 101
 102         assert(netdev);
 103         assert(!link);
 104         assert(b);
 105         assert(m);
 106
 107         if (b->mode != _NETDEV_BOND_MODE_INVALID) {
 108                 r = sd_rtnl_message_append_u8(m, IFLA_BOND_MODE,
 109                                               bond_mode_to_kernel(b->mode));
 110                 if (r < 0) {
 111                         log_error_netdev(netdev,
 112                                          "Could not append IFLA_BOND_MODE attribute: %s",
 113                                          strerror(-r));
 114                         return r;
 115                 }
 116         }
 117
 118         if (b->xmit_hash_policy != _NETDEV_BOND_XMIT_HASH_POLICY_INVALID) {
 119                 r = sd_rtnl_message_append_u8(m, IFLA_BOND_XMIT_HASH_POLICY,
 120                                               bond_xmit_hash_policy_to_kernel(b->xmit_hash_policy));
 121                 if (r < 0) {
 122                         log_error_netdev(netdev,
 123                                          "Could not append IFLA_BOND_XMIT_HASH_POLICY attribute: %s",
 124                                          strerror(-r));
 125                         return r;
 126                 }
 127         }
 128
 129         return 0;
 130 }
 131
 132 static void bond_init(NetDev *netdev) {
 133         Bond *b = BOND(netdev);
 134
 135         assert(netdev);
 136         assert(b);
 137
 138         b->mode = _NETDEV_BOND_MODE_INVALID;
 139         b->xmit_hash_policy = _NETDEV_BOND_XMIT_HASH_POLICY_INVALID;
 140 }
 141
 142 const NetDevVTable bond_vtable = {
 143         .object_size = sizeof(Bond),
 144         .init = bond_init,
 145         .sections = "Match\0NetDev\0Bond\0",
 146         .fill_message_create = netdev_bond_fill_message_create,
 147         .create_type = NETDEV_CREATE_MASTER,
 148 };