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07a4ddec3c
Currently, gratuitous ARP/ND packets are sent every `miimon'
milliseconds. This commit allows a user to specify a custom delay
through a new option, `peer_notif_delay'.
Like for `updelay' and `downdelay', this delay should be a multiple of
`miimon' to avoid managing an additional work queue. The configuration
logic is copied from `updelay' and `downdelay'. However, the default
value cannot be set using a module parameter: Netlink or sysfs should
be used to configure this feature.
When setting `miimon' to 100 and `peer_notif_delay' to 500, we can
observe the 500 ms delay is respected:
20:30:19.354693 ARP, Request who-has 203.0.113.10 tell 203.0.113.10, length 28
20:30:19.874892 ARP, Request who-has 203.0.113.10 tell 203.0.113.10, length 28
20:30:20.394919 ARP, Request who-has 203.0.113.10 tell 203.0.113.10, length 28
20:30:20.914963 ARP, Request who-has 203.0.113.10 tell 203.0.113.10, length 28
In bond_mii_monitor(), I have tried to keep the lock logic readable.
The change is due to the fact we cannot rely on a notification to
lower the value of `bond->send_peer_notif' as `NETDEV_NOTIFY_PEERS' is
only triggered once every N times, while we need to decrement the
counter each time.
iproute2 also needs to be updated to be able to specify this new
attribute through `ip link'.
Signed-off-by: Vincent Bernat <vincent@bernat.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
134 lines
3.7 KiB
C
134 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* drivers/net/bond/bond_options.h - bonding options
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* Copyright (c) 2013 Nikolay Aleksandrov <nikolay@redhat.com>
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*/
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#ifndef _NET_BOND_OPTIONS_H
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#define _NET_BOND_OPTIONS_H
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#define BOND_OPT_MAX_NAMELEN 32
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#define BOND_OPT_VALID(opt) ((opt) < BOND_OPT_LAST)
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#define BOND_MODE_ALL_EX(x) (~(x))
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/* Option flags:
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* BOND_OPTFLAG_NOSLAVES - check if the bond device is empty before setting
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* BOND_OPTFLAG_IFDOWN - check if the bond device is down before setting
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* BOND_OPTFLAG_RAWVAL - the option parses the value itself
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*/
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enum {
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BOND_OPTFLAG_NOSLAVES = BIT(0),
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BOND_OPTFLAG_IFDOWN = BIT(1),
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BOND_OPTFLAG_RAWVAL = BIT(2)
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};
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/* Value type flags:
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* BOND_VALFLAG_DEFAULT - mark the value as default
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* BOND_VALFLAG_(MIN|MAX) - mark the value as min/max
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*/
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enum {
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BOND_VALFLAG_DEFAULT = BIT(0),
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BOND_VALFLAG_MIN = BIT(1),
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BOND_VALFLAG_MAX = BIT(2)
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};
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/* Option IDs, their bit positions correspond to their IDs */
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enum {
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BOND_OPT_MODE,
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BOND_OPT_PACKETS_PER_SLAVE,
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BOND_OPT_XMIT_HASH,
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BOND_OPT_ARP_VALIDATE,
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BOND_OPT_ARP_ALL_TARGETS,
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BOND_OPT_FAIL_OVER_MAC,
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BOND_OPT_ARP_INTERVAL,
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BOND_OPT_ARP_TARGETS,
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BOND_OPT_DOWNDELAY,
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BOND_OPT_UPDELAY,
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BOND_OPT_LACP_RATE,
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BOND_OPT_MINLINKS,
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BOND_OPT_AD_SELECT,
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BOND_OPT_NUM_PEER_NOTIF,
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BOND_OPT_MIIMON,
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BOND_OPT_PRIMARY,
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BOND_OPT_PRIMARY_RESELECT,
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BOND_OPT_USE_CARRIER,
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BOND_OPT_ACTIVE_SLAVE,
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BOND_OPT_QUEUE_ID,
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BOND_OPT_ALL_SLAVES_ACTIVE,
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BOND_OPT_RESEND_IGMP,
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BOND_OPT_LP_INTERVAL,
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BOND_OPT_SLAVES,
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BOND_OPT_TLB_DYNAMIC_LB,
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BOND_OPT_AD_ACTOR_SYS_PRIO,
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BOND_OPT_AD_ACTOR_SYSTEM,
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BOND_OPT_AD_USER_PORT_KEY,
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BOND_OPT_NUM_PEER_NOTIF_ALIAS,
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BOND_OPT_PEER_NOTIF_DELAY,
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BOND_OPT_LAST
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};
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/* This structure is used for storing option values and for passing option
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* values when changing an option. The logic when used as an arg is as follows:
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* - if string != NULL -> parse it, if the opt is RAW type then return it, else
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* return the parse result
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* - if string == NULL -> parse value
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*/
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struct bond_opt_value {
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char *string;
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u64 value;
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u32 flags;
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};
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struct bonding;
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struct bond_option {
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int id;
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const char *name;
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const char *desc;
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u32 flags;
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/* unsuppmodes is used to denote modes in which the option isn't
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* supported.
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*/
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unsigned long unsuppmodes;
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/* supported values which this option can have, can be a subset of
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* BOND_OPTVAL_RANGE's value range
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*/
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const struct bond_opt_value *values;
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int (*set)(struct bonding *bond, const struct bond_opt_value *val);
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};
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int __bond_opt_set(struct bonding *bond, unsigned int option,
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struct bond_opt_value *val);
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int __bond_opt_set_notify(struct bonding *bond, unsigned int option,
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struct bond_opt_value *val);
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int bond_opt_tryset_rtnl(struct bonding *bond, unsigned int option, char *buf);
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const struct bond_opt_value *bond_opt_parse(const struct bond_option *opt,
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struct bond_opt_value *val);
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const struct bond_option *bond_opt_get(unsigned int option);
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const struct bond_option *bond_opt_get_by_name(const char *name);
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const struct bond_opt_value *bond_opt_get_val(unsigned int option, u64 val);
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/* This helper is used to initialize a bond_opt_value structure for parameter
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* passing. There should be either a valid string or value, but not both.
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* When value is ULLONG_MAX then string will be used.
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*/
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static inline void __bond_opt_init(struct bond_opt_value *optval,
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char *string, u64 value)
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{
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memset(optval, 0, sizeof(*optval));
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optval->value = ULLONG_MAX;
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if (value == ULLONG_MAX)
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optval->string = string;
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else
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optval->value = value;
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}
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#define bond_opt_initval(optval, value) __bond_opt_init(optval, NULL, value)
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#define bond_opt_initstr(optval, str) __bond_opt_init(optval, str, ULLONG_MAX)
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void bond_option_arp_ip_targets_clear(struct bonding *bond);
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#endif /* _NET_BOND_OPTIONS_H */
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