From 5944b5abd8646e8c6ac6af2b55f87dede1dae898 Mon Sep 17 00:00:00 2001 From: Hangbin Liu Date: Tue, 30 Nov 2021 12:29:47 +0800 Subject: [PATCH] Bonding: add arp_missed_max option Currently, we use hard code number to verify if we are in the arp_interval timeslice. But some user may want to reduce/extend the verify timeslice. With the similar team option 'missed_max' the uers could change that number based on their own environment. Acked-by: Jay Vosburgh Signed-off-by: Hangbin Liu Signed-off-by: David S. Miller --- Documentation/networking/bonding.rst | 11 +++++++++++ drivers/net/bonding/bond_main.c | 17 +++++++++-------- drivers/net/bonding/bond_netlink.c | 15 +++++++++++++++ drivers/net/bonding/bond_options.c | 28 ++++++++++++++++++++++++++++ drivers/net/bonding/bond_procfs.c | 2 ++ drivers/net/bonding/bond_sysfs.c | 13 +++++++++++++ include/net/bond_options.h | 1 + include/net/bonding.h | 1 + include/uapi/linux/if_link.h | 1 + tools/include/uapi/linux/if_link.h | 1 + 10 files changed, 82 insertions(+), 8 deletions(-) diff --git a/Documentation/networking/bonding.rst b/Documentation/networking/bonding.rst index 31cfd7d674a6..e5a07cb48f68 100644 --- a/Documentation/networking/bonding.rst +++ b/Documentation/networking/bonding.rst @@ -421,6 +421,17 @@ arp_all_targets consider the slave up only when all of the arp_ip_targets are reachable +arp_missed_max + + Specifies the number of arp_interval monitor checks that must + fail in order for an interface to be marked down by the ARP monitor. + + In order to provide orderly failover semantics, backup interfaces + are permitted an extra monitor check (i.e., they must fail + arp_missed_max + 1 times before being marked down). + + The default value is 2, and the allowable range is 1 - 255. + downdelay Specifies the time, in milliseconds, to wait before disabling diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index cf73eacdda91..f3aa49b97f81 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -3129,8 +3129,8 @@ static void bond_loadbalance_arp_mon(struct bonding *bond) * when the source ip is 0, so don't take the link down * if we don't know our ip yet */ - if (!bond_time_in_interval(bond, trans_start, 2) || - !bond_time_in_interval(bond, slave->last_rx, 2)) { + if (!bond_time_in_interval(bond, trans_start, bond->params.missed_max) || + !bond_time_in_interval(bond, slave->last_rx, bond->params.missed_max)) { bond_propose_link_state(slave, BOND_LINK_DOWN); slave_state_changed = 1; @@ -3224,7 +3224,7 @@ static int bond_ab_arp_inspect(struct bonding *bond) /* Backup slave is down if: * - No current_arp_slave AND - * - more than 3*delta since last receive AND + * - more than (missed_max+1)*delta since last receive AND * - the bond has an IP address * * Note: a non-null current_arp_slave indicates @@ -3236,20 +3236,20 @@ static int bond_ab_arp_inspect(struct bonding *bond) */ if (!bond_is_active_slave(slave) && !rcu_access_pointer(bond->current_arp_slave) && - !bond_time_in_interval(bond, last_rx, 3)) { + !bond_time_in_interval(bond, last_rx, bond->params.missed_max + 1)) { bond_propose_link_state(slave, BOND_LINK_DOWN); commit++; } /* Active slave is down if: - * - more than 2*delta since transmitting OR - * - (more than 2*delta since receive AND + * - more than missed_max*delta since transmitting OR + * - (more than missed_max*delta since receive AND * the bond has an IP address) */ trans_start = dev_trans_start(slave->dev); if (bond_is_active_slave(slave) && - (!bond_time_in_interval(bond, trans_start, 2) || - !bond_time_in_interval(bond, last_rx, 2))) { + (!bond_time_in_interval(bond, trans_start, bond->params.missed_max) || + !bond_time_in_interval(bond, last_rx, bond->params.missed_max))) { bond_propose_link_state(slave, BOND_LINK_DOWN); commit++; } @@ -5822,6 +5822,7 @@ static int bond_check_params(struct bond_params *params) params->arp_interval = arp_interval; params->arp_validate = arp_validate_value; params->arp_all_targets = arp_all_targets_value; + params->missed_max = 2; params->updelay = updelay; params->downdelay = downdelay; params->peer_notif_delay = 0; diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c index 5d54e11d18fa..1007bf6d385d 100644 --- a/drivers/net/bonding/bond_netlink.c +++ b/drivers/net/bonding/bond_netlink.c @@ -110,6 +110,7 @@ static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = { .len = ETH_ALEN }, [IFLA_BOND_TLB_DYNAMIC_LB] = { .type = NLA_U8 }, [IFLA_BOND_PEER_NOTIF_DELAY] = { .type = NLA_U32 }, + [IFLA_BOND_MISSED_MAX] = { .type = NLA_U8 }, }; static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = { @@ -453,6 +454,15 @@ static int bond_changelink(struct net_device *bond_dev, struct nlattr *tb[], return err; } + if (data[IFLA_BOND_MISSED_MAX]) { + int missed_max = nla_get_u8(data[IFLA_BOND_MISSED_MAX]); + + bond_opt_initval(&newval, missed_max); + err = __bond_opt_set(bond, BOND_OPT_MISSED_MAX, &newval); + if (err) + return err; + } + return 0; } @@ -515,6 +525,7 @@ static size_t bond_get_size(const struct net_device *bond_dev) nla_total_size(ETH_ALEN) + /* IFLA_BOND_AD_ACTOR_SYSTEM */ nla_total_size(sizeof(u8)) + /* IFLA_BOND_TLB_DYNAMIC_LB */ nla_total_size(sizeof(u32)) + /* IFLA_BOND_PEER_NOTIF_DELAY */ + nla_total_size(sizeof(u8)) + /* IFLA_BOND_MISSED_MAX */ 0; } @@ -650,6 +661,10 @@ static int bond_fill_info(struct sk_buff *skb, bond->params.tlb_dynamic_lb)) goto nla_put_failure; + if (nla_put_u8(skb, IFLA_BOND_MISSED_MAX, + bond->params.missed_max)) + goto nla_put_failure; + if (BOND_MODE(bond) == BOND_MODE_8023AD) { struct ad_info info; diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c index a8fde3bc458f..0f48921c4f15 100644 --- a/drivers/net/bonding/bond_options.c +++ b/drivers/net/bonding/bond_options.c @@ -78,6 +78,8 @@ static int bond_option_ad_actor_system_set(struct bonding *bond, const struct bond_opt_value *newval); static int bond_option_ad_user_port_key_set(struct bonding *bond, const struct bond_opt_value *newval); +static int bond_option_missed_max_set(struct bonding *bond, + const struct bond_opt_value *newval); static const struct bond_opt_value bond_mode_tbl[] = { @@ -213,6 +215,13 @@ static const struct bond_opt_value bond_ad_user_port_key_tbl[] = { { NULL, -1, 0}, }; +static const struct bond_opt_value bond_missed_max_tbl[] = { + { "minval", 1, BOND_VALFLAG_MIN}, + { "maxval", 255, BOND_VALFLAG_MAX}, + { "default", 2, BOND_VALFLAG_DEFAULT}, + { NULL, -1, 0}, +}; + static const struct bond_option bond_opts[BOND_OPT_LAST] = { [BOND_OPT_MODE] = { .id = BOND_OPT_MODE, @@ -270,6 +279,15 @@ static const struct bond_option bond_opts[BOND_OPT_LAST] = { .values = bond_intmax_tbl, .set = bond_option_arp_interval_set }, + [BOND_OPT_MISSED_MAX] = { + .id = BOND_OPT_MISSED_MAX, + .name = "arp_missed_max", + .desc = "Maximum number of missed ARP interval", + .unsuppmodes = BIT(BOND_MODE_8023AD) | BIT(BOND_MODE_TLB) | + BIT(BOND_MODE_ALB), + .values = bond_missed_max_tbl, + .set = bond_option_missed_max_set + }, [BOND_OPT_ARP_TARGETS] = { .id = BOND_OPT_ARP_TARGETS, .name = "arp_ip_target", @@ -1186,6 +1204,16 @@ static int bond_option_arp_all_targets_set(struct bonding *bond, return 0; } +static int bond_option_missed_max_set(struct bonding *bond, + const struct bond_opt_value *newval) +{ + netdev_dbg(bond->dev, "Setting missed max to %s (%llu)\n", + newval->string, newval->value); + bond->params.missed_max = newval->value; + + return 0; +} + static int bond_option_primary_set(struct bonding *bond, const struct bond_opt_value *newval) { diff --git a/drivers/net/bonding/bond_procfs.c b/drivers/net/bonding/bond_procfs.c index f3e3bfd72556..2ec11af5f0cc 100644 --- a/drivers/net/bonding/bond_procfs.c +++ b/drivers/net/bonding/bond_procfs.c @@ -115,6 +115,8 @@ static void bond_info_show_master(struct seq_file *seq) seq_printf(seq, "ARP Polling Interval (ms): %d\n", bond->params.arp_interval); + seq_printf(seq, "ARP Missed Max: %u\n", + bond->params.missed_max); seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); diff --git a/drivers/net/bonding/bond_sysfs.c b/drivers/net/bonding/bond_sysfs.c index c48b77167fab..9b5a5df23d21 100644 --- a/drivers/net/bonding/bond_sysfs.c +++ b/drivers/net/bonding/bond_sysfs.c @@ -303,6 +303,18 @@ static ssize_t bonding_show_arp_targets(struct device *d, static DEVICE_ATTR(arp_ip_target, 0644, bonding_show_arp_targets, bonding_sysfs_store_option); +/* Show the arp missed max. */ +static ssize_t bonding_show_missed_max(struct device *d, + struct device_attribute *attr, + char *buf) +{ + struct bonding *bond = to_bond(d); + + return sprintf(buf, "%u\n", bond->params.missed_max); +} +static DEVICE_ATTR(arp_missed_max, 0644, + bonding_show_missed_max, bonding_sysfs_store_option); + /* Show the up and down delays. */ static ssize_t bonding_show_downdelay(struct device *d, struct device_attribute *attr, @@ -779,6 +791,7 @@ static struct attribute *per_bond_attrs[] = { &dev_attr_ad_actor_sys_prio.attr, &dev_attr_ad_actor_system.attr, &dev_attr_ad_user_port_key.attr, + &dev_attr_arp_missed_max.attr, NULL, }; diff --git a/include/net/bond_options.h b/include/net/bond_options.h index e64833a674eb..dd75c071f67e 100644 --- a/include/net/bond_options.h +++ b/include/net/bond_options.h @@ -65,6 +65,7 @@ enum { BOND_OPT_NUM_PEER_NOTIF_ALIAS, BOND_OPT_PEER_NOTIF_DELAY, BOND_OPT_LACP_ACTIVE, + BOND_OPT_MISSED_MAX, BOND_OPT_LAST }; diff --git a/include/net/bonding.h b/include/net/bonding.h index 15e083e18f75..f6ae3a4baea4 100644 --- a/include/net/bonding.h +++ b/include/net/bonding.h @@ -121,6 +121,7 @@ struct bond_params { int xmit_policy; int miimon; u8 num_peer_notif; + u8 missed_max; int arp_interval; int arp_validate; int arp_all_targets; diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h index eebd3894fe89..4ac53b30b6dc 100644 --- a/include/uapi/linux/if_link.h +++ b/include/uapi/linux/if_link.h @@ -858,6 +858,7 @@ enum { IFLA_BOND_TLB_DYNAMIC_LB, IFLA_BOND_PEER_NOTIF_DELAY, IFLA_BOND_AD_LACP_ACTIVE, + IFLA_BOND_MISSED_MAX, __IFLA_BOND_MAX, }; diff --git a/tools/include/uapi/linux/if_link.h b/tools/include/uapi/linux/if_link.h index eebd3894fe89..4ac53b30b6dc 100644 --- a/tools/include/uapi/linux/if_link.h +++ b/tools/include/uapi/linux/if_link.h @@ -858,6 +858,7 @@ enum { IFLA_BOND_TLB_DYNAMIC_LB, IFLA_BOND_PEER_NOTIF_DELAY, IFLA_BOND_AD_LACP_ACTIVE, + IFLA_BOND_MISSED_MAX, __IFLA_BOND_MAX, }; -- 2.11.0