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Message-Id: <20211130042948.1629239-1-liuhangbin@gmail.com>
Date: Tue, 30 Nov 2021 12:29:47 +0800
From: Hangbin Liu <liuhangbin@...il.com>
To: netdev@...r.kernel.org
Cc: Jay Vosburgh <j.vosburgh@...il.com>,
Veaceslav Falico <vfalico@...il.com>,
Andy Gospodarek <andy@...yhouse.net>,
Jarod Wilson <jarod@...hat.com>,
Jakub Kicinski <kuba@...nel.org>,
Jiri Pirko <jiri@...nulli.us>, davem@...emloft.net,
Denis Kirjanov <dkirjanov@...e.de>,
David Ahern <dsahern@...il.com>,
Hangbin Liu <liuhangbin@...il.com>,
Jay Vosburgh <jay.vosburgh@...onical.com>
Subject: [PATCHv4 net-next] 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 <jay.vosburgh@...onical.com>
Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
---
v2: set IFLA_BOND_MISSED_MAX to NLA_U8, and limit the values to 1-255
v3: rename the option name to arp_missed_max
v4: Update document description based on Jay's suggestion.
---
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,
};
--
2.31.1
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