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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* drivers/net/bond/bond_options.h - bonding options
* Copyright (c) 2013 Nikolay Aleksandrov <nikolay@redhat.com>
*/
#ifndef _NET_BOND_OPTIONS_H
#define _NET_BOND_OPTIONS_H
#include <linux/bits.h>
#include <linux/limits.h>
#include <linux/types.h>
#include <linux/string.h>
struct netlink_ext_ack;
struct nlattr;
#define BOND_OPT_MAX_NAMELEN 32
#define BOND_OPT_VALID(opt) ((opt) < BOND_OPT_LAST)
#define BOND_MODE_ALL_EX(x) (~(x))
/* Option flags:
* BOND_OPTFLAG_NOSLAVES - check if the bond device is empty before setting
* BOND_OPTFLAG_IFDOWN - check if the bond device is down before setting
* BOND_OPTFLAG_RAWVAL - the option parses the value itself
*/
enum {
BOND_OPTFLAG_NOSLAVES = BIT(0),
BOND_OPTFLAG_IFDOWN = BIT(1),
BOND_OPTFLAG_RAWVAL = BIT(2)
};
/* Value type flags:
* BOND_VALFLAG_DEFAULT - mark the value as default
* BOND_VALFLAG_(MIN|MAX) - mark the value as min/max
*/
enum {
BOND_VALFLAG_DEFAULT = BIT(0),
BOND_VALFLAG_MIN = BIT(1),
BOND_VALFLAG_MAX = BIT(2)
};
/* Option IDs, their bit positions correspond to their IDs */
enum {
BOND_OPT_MODE,
BOND_OPT_PACKETS_PER_SLAVE,
BOND_OPT_XMIT_HASH,
BOND_OPT_ARP_VALIDATE,
BOND_OPT_ARP_ALL_TARGETS,
BOND_OPT_FAIL_OVER_MAC,
BOND_OPT_ARP_INTERVAL,
BOND_OPT_ARP_TARGETS,
BOND_OPT_DOWNDELAY,
BOND_OPT_UPDELAY,
BOND_OPT_LACP_RATE,
BOND_OPT_MINLINKS,
BOND_OPT_AD_SELECT,
BOND_OPT_NUM_PEER_NOTIF,
BOND_OPT_MIIMON,
BOND_OPT_PRIMARY,
BOND_OPT_PRIMARY_RESELECT,
BOND_OPT_USE_CARRIER,
BOND_OPT_ACTIVE_SLAVE,
BOND_OPT_QUEUE_ID,
BOND_OPT_ALL_SLAVES_ACTIVE,
BOND_OPT_RESEND_IGMP,
BOND_OPT_LP_INTERVAL,
BOND_OPT_SLAVES,
BOND_OPT_TLB_DYNAMIC_LB,
BOND_OPT_AD_ACTOR_SYS_PRIO,
BOND_OPT_AD_ACTOR_SYSTEM,
BOND_OPT_AD_USER_PORT_KEY,
BOND_OPT_NUM_PEER_NOTIF_ALIAS,
BOND_OPT_PEER_NOTIF_DELAY,
BOND_OPT_LACP_ACTIVE,
BOND_OPT_MISSED_MAX,
BOND_OPT_NS_TARGETS,
BOND_OPT_PRIO,
BOND_OPT_COUPLED_CONTROL,
BOND_OPT_LAST
};
/* This structure is used for storing option values and for passing option
* values when changing an option. The logic when used as an arg is as follows:
* - if value != ULLONG_MAX -> parse value
* - if string != NULL -> parse string
* - if the opt is RAW data and length less than maxlen,
* copy the data to extra storage
*/
#define BOND_OPT_EXTRA_MAXLEN 16
struct bond_opt_value {
char *string;
u64 value;
u32 flags;
union {
char extra[BOND_OPT_EXTRA_MAXLEN];
struct net_device *slave_dev;
};
};
struct bonding;
struct bond_option {
int id;
const char *name;
const char *desc;
u32 flags;
/* unsuppmodes is used to denote modes in which the option isn't
* supported.
*/
unsigned long unsuppmodes;
/* supported values which this option can have, can be a subset of
* BOND_OPTVAL_RANGE's value range
*/
const struct bond_opt_value *values;
int (*set)(struct bonding *bond, const struct bond_opt_value *val);
};
int __bond_opt_set(struct bonding *bond, unsigned int option,
struct bond_opt_value *val,
struct nlattr *bad_attr, struct netlink_ext_ack *extack);
int __bond_opt_set_notify(struct bonding *bond, unsigned int option,
struct bond_opt_value *val);
int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf);
const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
struct bond_opt_value *val);
const struct bond_option *bond_opt_get(unsigned int option);
const struct bond_option *bond_opt_get_by_name(const char *name);
const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val);
/* This helper is used to initialize a bond_opt_value structure for parameter
* passing. There should be either a valid string or value, but not both.
* When value is ULLONG_MAX then string will be used.
*/
static inline void __bond_opt_init(struct bond_opt_value *optval,
char *string, u64 value,
void *extra, size_t extra_len)
{
memset(optval, 0, sizeof(*optval));
optval->value = ULLONG_MAX;
if (value != ULLONG_MAX)
optval->value = value;
else if (string)
optval->string = string;
if (extra && extra_len <= BOND_OPT_EXTRA_MAXLEN)
memcpy(optval->extra, extra, extra_len);
}
#define bond_opt_initval(optval, value) __bond_opt_init(optval, NULL, value, NULL, 0)
#define bond_opt_initstr(optval, str) __bond_opt_init(optval, str, ULLONG_MAX, NULL, 0)
#define bond_opt_initextra(optval, extra, extra_len) \
__bond_opt_init(optval, NULL, ULLONG_MAX, extra, extra_len)
#define bond_opt_slave_initval(optval, slave_dev, value) \
__bond_opt_init(optval, NULL, value, slave_dev, sizeof(struct net_device *))
void bond_option_arp_ip_targets_clear(struct bonding *bond);
#if IS_ENABLED(CONFIG_IPV6)
void bond_option_ns_ip6_targets_clear(struct bonding *bond);
#endif
#endif /* _NET_BOND_OPTIONS_H */
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