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Message-Id: <20220412041322.2409558-1-liuhangbin@gmail.com>
Date: Tue, 12 Apr 2022 12:13:22 +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>,
"David S . Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
David Ahern <dsahern@...il.com>,
Nikolay Aleksandrov <nikolay@...dia.com>,
Jonathan Toppins <jtoppins@...hat.com>,
Eric Dumazet <eric.dumazet@...il.com>,
Paolo Abeni <pabeni@...hat.com>,
Hangbin Liu <liuhangbin@...il.com>
Subject: [PATCH net-next] Bonding: add per port priority support
Add per port priority support for bonding. A higher number means higher
priority. The primary slave still has the highest priority. This option
also follows the primary_reselect rules.
This option could only be configured via netlink.
Signed-off-by: Hangbin Liu <liuhangbin@...il.com>
---
Documentation/networking/bonding.rst | 9 +++++++++
drivers/net/bonding/bond_main.c | 27 +++++++++++++++++++++++++++
drivers/net/bonding/bond_netlink.c | 12 ++++++++++++
include/net/bonding.h | 1 +
include/uapi/linux/if_link.h | 1 +
tools/include/uapi/linux/if_link.h | 1 +
6 files changed, 51 insertions(+)
diff --git a/Documentation/networking/bonding.rst b/Documentation/networking/bonding.rst
index 525e6842dd33..103e292a04a1 100644
--- a/Documentation/networking/bonding.rst
+++ b/Documentation/networking/bonding.rst
@@ -780,6 +780,15 @@ peer_notif_delay
value is 0 which means to match the value of the link monitor
interval.
+prio
+ Slave priority. A higher number means higher priority.
+ The primary slave has the highest priority. This option also
+ follows the primary_reselect rules.
+
+ This option could only be configured via netlink, and is only valid
+ for active-backup(1), balance-tlb (5) and balance-alb (6) mode.
+ The default value is 0.
+
primary
A string (eth0, eth2, etc) specifying which slave is the
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index 15eddca7b4b6..4211b79ac619 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -1026,12 +1026,38 @@ static void bond_do_fail_over_mac(struct bonding *bond,
}
+/**
+ * bond_choose_primary_or_current - select the primary or high priority slave
+ * @bond: our bonding struct
+ *
+ * - Check if there is a primary link. If the primary link was set and is up,
+ * go on and do link reselection.
+ *
+ * - If primary link is not set or down, find the highest priority link.
+ * If the highest priority link is not current slave, set it as primary
+ * link and do link reselection.
+ */
static struct slave *bond_choose_primary_or_current(struct bonding *bond)
{
struct slave *prim = rtnl_dereference(bond->primary_slave);
struct slave *curr = rtnl_dereference(bond->curr_active_slave);
+ struct slave *slave, *hprio = NULL;
+ struct list_head *iter;
if (!prim || prim->link != BOND_LINK_UP) {
+ bond_for_each_slave(bond, slave, iter) {
+ if (slave->link == BOND_LINK_UP) {
+ hprio = hprio ? hprio : slave;
+ if (slave->prio > hprio->prio)
+ hprio = slave;
+ }
+ }
+
+ if (hprio && hprio != curr) {
+ prim = hprio;
+ goto link_reselect;
+ }
+
if (!curr || curr->link != BOND_LINK_UP)
return NULL;
return curr;
@@ -1042,6 +1068,7 @@ static struct slave *bond_choose_primary_or_current(struct bonding *bond)
return prim;
}
+link_reselect:
if (!curr || curr->link != BOND_LINK_UP)
return prim;
diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
index f427fa1737c7..63066559e7d6 100644
--- a/drivers/net/bonding/bond_netlink.c
+++ b/drivers/net/bonding/bond_netlink.c
@@ -27,6 +27,7 @@ static size_t bond_get_slave_size(const struct net_device *bond_dev,
nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_AD_AGGREGATOR_ID */
nla_total_size(sizeof(u8)) + /* IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE */
nla_total_size(sizeof(u16)) + /* IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE */
+ nla_total_size(sizeof(s32)) + /* IFLA_BOND_SLAVE_PRIO */
0;
}
@@ -53,6 +54,9 @@ static int bond_fill_slave_info(struct sk_buff *skb,
if (nla_put_u16(skb, IFLA_BOND_SLAVE_QUEUE_ID, slave->queue_id))
goto nla_put_failure;
+ if (nla_put_s32(skb, IFLA_BOND_SLAVE_PRIO, slave->prio))
+ goto nla_put_failure;
+
if (BOND_MODE(slave->bond) == BOND_MODE_8023AD) {
const struct aggregator *agg;
const struct port *ad_port;
@@ -117,6 +121,7 @@ static const struct nla_policy bond_policy[IFLA_BOND_MAX + 1] = {
static const struct nla_policy bond_slave_policy[IFLA_BOND_SLAVE_MAX + 1] = {
[IFLA_BOND_SLAVE_QUEUE_ID] = { .type = NLA_U16 },
+ [IFLA_BOND_SLAVE_PRIO] = { .type = NLA_S32 },
};
static int bond_validate(struct nlattr *tb[], struct nlattr *data[],
@@ -136,6 +141,7 @@ static int bond_slave_changelink(struct net_device *bond_dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack)
{
+ struct slave *slave = bond_slave_get_rtnl(slave_dev);
struct bonding *bond = netdev_priv(bond_dev);
struct bond_opt_value newval;
int err;
@@ -156,6 +162,12 @@ static int bond_slave_changelink(struct net_device *bond_dev,
return err;
}
+ /* No need to bother __bond_opt_set as we only support netlink config */
+ if (data[IFLA_BOND_SLAVE_PRIO]) {
+ slave->prio = nla_get_s32(data[IFLA_BOND_SLAVE_PRIO]);
+ bond_select_active_slave(bond);
+ }
+
return 0;
}
diff --git a/include/net/bonding.h b/include/net/bonding.h
index b14f4c0b4e9e..4ff093fb2289 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -176,6 +176,7 @@ struct slave {
u32 speed;
u16 queue_id;
u8 perm_hwaddr[MAX_ADDR_LEN];
+ int prio;
struct ad_slave_info *ad_info;
struct tlb_slave_info tlb_info;
#ifdef CONFIG_NET_POLL_CONTROLLER
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index cc284c048e69..204e342b107a 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -956,6 +956,7 @@ enum {
IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
+ IFLA_BOND_SLAVE_PRIO,
__IFLA_BOND_SLAVE_MAX,
};
diff --git a/tools/include/uapi/linux/if_link.h b/tools/include/uapi/linux/if_link.h
index e1ba2d51b717..ee5de9f3700b 100644
--- a/tools/include/uapi/linux/if_link.h
+++ b/tools/include/uapi/linux/if_link.h
@@ -888,6 +888,7 @@ enum {
IFLA_BOND_SLAVE_AD_AGGREGATOR_ID,
IFLA_BOND_SLAVE_AD_ACTOR_OPER_PORT_STATE,
IFLA_BOND_SLAVE_AD_PARTNER_OPER_PORT_STATE,
+ IFLA_BOND_SLAVE_PRIO,
__IFLA_BOND_SLAVE_MAX,
};
--
2.35.1
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