drivers/net/bonding/bond_options.h

   1 /*
   2  * drivers/net/bond/bond_options.h - bonding options
   3  * Copyright (c) 2013 Nikolay Aleksandrov <nikolay@redhat.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  */
  10
  11 #ifndef _BOND_OPTIONS_H
  12 #define _BOND_OPTIONS_H
  13
  14 #define BOND_OPT_MAX_NAMELEN 32
  15 #define BOND_OPT_VALID(opt) ((opt) < BOND_OPT_LAST)
  16 #define BOND_MODE_ALL_EX(x) (~(x))
  17
  18 /* Option flags:
  19  * BOND_OPTFLAG_NOSLAVES - check if the bond device is empty before setting
  20  * BOND_OPTFLAG_IFDOWN - check if the bond device is down before setting
  21  * BOND_OPTFLAG_RAWVAL - the option parses the value itself
  22  */
  23 enum {
  24         BOND_OPTFLAG_NOSLAVES   = BIT(0),
  25         BOND_OPTFLAG_IFDOWN     = BIT(1),
  26         BOND_OPTFLAG_RAWVAL     = BIT(2)
  27 };
  28
  29 /* Value type flags:
  30  * BOND_VALFLAG_DEFAULT - mark the value as default
  31  * BOND_VALFLAG_(MIN|MAX) - mark the value as min/max
  32  */
  33 enum {
  34         BOND_VALFLAG_DEFAULT    = BIT(0),
  35         BOND_VALFLAG_MIN        = BIT(1),
  36         BOND_VALFLAG_MAX        = BIT(2)
  37 };
  38
  39 /* Option IDs, their bit positions correspond to their IDs */
  40 enum {
  41         BOND_OPT_MODE,
  42         BOND_OPT_PACKETS_PER_SLAVE,
  43         BOND_OPT_XMIT_HASH,
  44         BOND_OPT_ARP_VALIDATE,
  45         BOND_OPT_ARP_ALL_TARGETS,
  46         BOND_OPT_FAIL_OVER_MAC,
  47         BOND_OPT_ARP_INTERVAL,
  48         BOND_OPT_ARP_TARGETS,
  49         BOND_OPT_DOWNDELAY,
  50         BOND_OPT_UPDELAY,
  51         BOND_OPT_LACP_RATE,
  52         BOND_OPT_MINLINKS,
  53         BOND_OPT_AD_SELECT,
  54         BOND_OPT_NUM_PEER_NOTIF,
  55         BOND_OPT_MIIMON,
  56         BOND_OPT_PRIMARY,
  57         BOND_OPT_PRIMARY_RESELECT,
  58         BOND_OPT_USE_CARRIER,
  59         BOND_OPT_ACTIVE_SLAVE,
  60         BOND_OPT_QUEUE_ID,
  61         BOND_OPT_ALL_SLAVES_ACTIVE,
  62         BOND_OPT_RESEND_IGMP,
  63         BOND_OPT_LP_INTERVAL,
  64         BOND_OPT_SLAVES,
  65         BOND_OPT_TLB_DYNAMIC_LB,
  66         BOND_OPT_LAST
  67 };
  68
  69 /* This structure is used for storing option values and for passing option
  70  * values when changing an option. The logic when used as an arg is as follows:
  71  * - if string != NULL -> parse it, if the opt is RAW type then return it, else
  72  *   return the parse result
  73  * - if string == NULL -> parse value
  74  */
  75 struct bond_opt_value {
  76         char *string;
  77         u64 value;
  78         u32 flags;
  79 };
  80
  81 struct bonding;
  82
  83 struct bond_option {
  84         int id;
  85         const char *name;
  86         const char *desc;
  87         u32 flags;
  88
  89         /* unsuppmodes is used to denote modes in which the option isn't
  90          * supported.
  91          */
  92         unsigned long unsuppmodes;
  93         /* supported values which this option can have, can be a subset of
  94          * BOND_OPTVAL_RANGE's value range
  95          */
  96         const struct bond_opt_value *values;
  97
  98         int (*set)(struct bonding *bond, const struct bond_opt_value *val);
  99 };
 100
 101 int __bond_opt_set(struct bonding *bond, unsigned int option,
 102                    struct bond_opt_value *val);
 103 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf);
 104
 105 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
 106                                             struct bond_opt_value *val);
 107 const struct bond_option *bond_opt_get(unsigned int option);
 108 const struct bond_option *bond_opt_get_by_name(const char *name);
 109 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val);
 110
 111 /* This helper is used to initialize a bond_opt_value structure for parameter
 112  * passing. There should be either a valid string or value, but not both.
 113  * When value is ULLONG_MAX then string will be used.
 114  */
 115 static inline void __bond_opt_init(struct bond_opt_value *optval,
 116                                    char *string, u64 value)
 117 {
 118         memset(optval, 0, sizeof(*optval));
 119         optval->value = ULLONG_MAX;
 120         if (value == ULLONG_MAX)
 121                 optval->string = string;
 122         else
 123                 optval->value = value;
 124 }
 125 #define bond_opt_initval(optval, value) __bond_opt_init(optval, NULL, value)
 126 #define bond_opt_initstr(optval, str) __bond_opt_init(optval, str, ULLONG_MAX)
 127
 128 void bond_option_arp_ip_targets_clear(struct bonding *bond);
 129
 130 #endif /* _BOND_OPTIONS_H */