1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * drivers/net/bond/bond_options.h - bonding options 4 * Copyright (c) 2013 Nikolay Aleksandrov <nikolay@redhat.com> 5 */ 6 7 #ifndef _NET_BOND_OPTIONS_H 8 #define _NET_BOND_OPTIONS_H 9 10 #include <linux/bits.h> 11 #include <linux/limits.h> 12 #include <linux/types.h> 13 #include <linux/string.h> 14 15 struct netlink_ext_ack; 16 struct nlattr; 17 18 #define BOND_OPT_MAX_NAMELEN 32 19 #define BOND_OPT_VALID(opt) ((opt) < BOND_OPT_LAST) 20 #define BOND_MODE_ALL_EX(x) (~(x)) 21 22 /* Option flags: 23 * BOND_OPTFLAG_NOSLAVES - check if the bond device is empty before setting 24 * BOND_OPTFLAG_IFDOWN - check if the bond device is down before setting 25 * BOND_OPTFLAG_RAWVAL - the option parses the value itself 26 */ 27 enum { 28 BOND_OPTFLAG_NOSLAVES = BIT(0), 29 BOND_OPTFLAG_IFDOWN = BIT(1), 30 BOND_OPTFLAG_RAWVAL = BIT(2) 31 }; 32 33 /* Value type flags: 34 * BOND_VALFLAG_DEFAULT - mark the value as default 35 * BOND_VALFLAG_(MIN|MAX) - mark the value as min/max 36 */ 37 enum { 38 BOND_VALFLAG_DEFAULT = BIT(0), 39 BOND_VALFLAG_MIN = BIT(1), 40 BOND_VALFLAG_MAX = BIT(2) 41 }; 42 43 /* Option IDs, their bit positions correspond to their IDs */ 44 enum { 45 BOND_OPT_MODE, 46 BOND_OPT_PACKETS_PER_SLAVE, 47 BOND_OPT_XMIT_HASH, 48 BOND_OPT_ARP_VALIDATE, 49 BOND_OPT_ARP_ALL_TARGETS, 50 BOND_OPT_FAIL_OVER_MAC, 51 BOND_OPT_ARP_INTERVAL, 52 BOND_OPT_ARP_TARGETS, 53 BOND_OPT_DOWNDELAY, 54 BOND_OPT_UPDELAY, 55 BOND_OPT_LACP_RATE, 56 BOND_OPT_MINLINKS, 57 BOND_OPT_AD_SELECT, 58 BOND_OPT_NUM_PEER_NOTIF, 59 BOND_OPT_MIIMON, 60 BOND_OPT_PRIMARY, 61 BOND_OPT_PRIMARY_RESELECT, 62 BOND_OPT_USE_CARRIER, 63 BOND_OPT_ACTIVE_SLAVE, 64 BOND_OPT_QUEUE_ID, 65 BOND_OPT_ALL_SLAVES_ACTIVE, 66 BOND_OPT_RESEND_IGMP, 67 BOND_OPT_LP_INTERVAL, 68 BOND_OPT_SLAVES, 69 BOND_OPT_TLB_DYNAMIC_LB, 70 BOND_OPT_AD_ACTOR_SYS_PRIO, 71 BOND_OPT_AD_ACTOR_SYSTEM, 72 BOND_OPT_AD_USER_PORT_KEY, 73 BOND_OPT_NUM_PEER_NOTIF_ALIAS, 74 BOND_OPT_PEER_NOTIF_DELAY, 75 BOND_OPT_LACP_ACTIVE, 76 BOND_OPT_MISSED_MAX, 77 BOND_OPT_NS_TARGETS, 78 BOND_OPT_PRIO, 79 BOND_OPT_COUPLED_CONTROL, 80 BOND_OPT_LAST 81 }; 82 83 /* This structure is used for storing option values and for passing option 84 * values when changing an option. The logic when used as an arg is as follows: 85 * - if value != ULLONG_MAX -> parse value 86 * - if string != NULL -> parse string 87 * - if the opt is RAW data and length less than maxlen, 88 * copy the data to extra storage 89 */ 90 91 #define BOND_OPT_EXTRA_MAXLEN 16 92 struct bond_opt_value { 93 char *string; 94 u64 value; 95 u32 flags; 96 union { 97 char extra[BOND_OPT_EXTRA_MAXLEN]; 98 struct net_device *slave_dev; 99 }; 100 }; 101 102 struct bonding; 103 104 struct bond_option { 105 int id; 106 const char *name; 107 const char *desc; 108 u32 flags; 109 110 /* unsuppmodes is used to denote modes in which the option isn't 111 * supported. 112 */ 113 unsigned long unsuppmodes; 114 /* supported values which this option can have, can be a subset of 115 * BOND_OPTVAL_RANGE's value range 116 */ 117 const struct bond_opt_value *values; 118 119 int (*set)(struct bonding *bond, const struct bond_opt_value *val); 120 }; 121 122 int __bond_opt_set(struct bonding *bond, unsigned int option, 123 struct bond_opt_value *val, 124 struct nlattr *bad_attr, struct netlink_ext_ack *extack); 125 int __bond_opt_set_notify(struct bonding *bond, unsigned int option, 126 struct bond_opt_value *val); 127 int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf); 128 129 const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt, 130 struct bond_opt_value *val); 131 const struct bond_option *bond_opt_get(unsigned int option); 132 const struct bond_option *bond_opt_get_by_name(const char *name); 133 const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val); 134 135 /* This helper is used to initialize a bond_opt_value structure for parameter 136 * passing. There should be either a valid string or value, but not both. 137 * When value is ULLONG_MAX then string will be used. 138 */ 139 static inline void __bond_opt_init(struct bond_opt_value *optval, 140 char *string, u64 value, 141 void *extra, size_t extra_len) 142 { 143 memset(optval, 0, sizeof(*optval)); 144 optval->value = ULLONG_MAX; 145 if (value != ULLONG_MAX) 146 optval->value = value; 147 else if (string) 148 optval->string = string; 149 150 if (extra && extra_len <= BOND_OPT_EXTRA_MAXLEN) 151 memcpy(optval->extra, extra, extra_len); 152 } 153 #define bond_opt_initval(optval, value) __bond_opt_init(optval, NULL, value, NULL, 0) 154 #define bond_opt_initstr(optval, str) __bond_opt_init(optval, str, ULLONG_MAX, NULL, 0) 155 #define bond_opt_initextra(optval, extra, extra_len) \ 156 __bond_opt_init(optval, NULL, ULLONG_MAX, extra, extra_len) 157 #define bond_opt_slave_initval(optval, slave_dev, value) \ 158 __bond_opt_init(optval, NULL, value, slave_dev, sizeof(struct net_device *)) 159 160 void bond_option_arp_ip_targets_clear(struct bonding *bond); 161 #if IS_ENABLED(CONFIG_IPV6) 162 void bond_option_ns_ip6_targets_clear(struct bonding *bond); 163 #endif 164 165 #endif /* _NET_BOND_OPTIONS_H */ 166