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Message-Id: <20220621074919.2636622-3-liuhangbin@gmail.com>
Date: Tue, 21 Jun 2022 15:49:19 +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>,
Jonathan Toppins <jtoppins@...hat.com>,
Paolo Abeni <pabeni@...hat.com>,
David Ahern <dsahern@...il.com>,
Hangbin Liu <liuhangbin@...il.com>
Subject: [PATCHv3 net-next 2/2] Bonding: add per-port priority for failover re-selection
Add per port priority support for bonding active slave re-selection during
failover. A higher number means higher priority in selection. 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>
---
v3: store slave_dev in bond_opt_value directly to simplify setting
values for slave.
v2: using the extant bonding options management stuff instead setting
slave prio in bond_slave_changelink() directly.
---
Documentation/networking/bonding.rst | 11 ++++++++++
drivers/net/bonding/bond_main.c | 27 +++++++++++++++++++++++
drivers/net/bonding/bond_netlink.c | 15 +++++++++++++
drivers/net/bonding/bond_options.c | 33 ++++++++++++++++++++++++++++
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 +
8 files changed, 90 insertions(+)
diff --git a/Documentation/networking/bonding.rst b/Documentation/networking/bonding.rst
index 43be3782e5df..53a18ff7cf23 100644
--- a/Documentation/networking/bonding.rst
+++ b/Documentation/networking/bonding.rst
@@ -780,6 +780,17 @@ 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 valid value range is a signed 32 bit integer.
+
+ 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 3d427183ec8e..3415a0feea07 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 ?: 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 5a6f44455b95..c2d080fc4fc4 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[],
@@ -157,6 +162,16 @@ static int bond_slave_changelink(struct net_device *bond_dev,
return err;
}
+ if (data[IFLA_BOND_SLAVE_PRIO]) {
+ int prio = nla_get_s32(data[IFLA_BOND_SLAVE_PRIO]);
+
+ bond_opt_slave_initval(&newval, &slave_dev, prio);
+ err = __bond_opt_set(bond, BOND_OPT_PRIO, &newval,
+ data[IFLA_BOND_SLAVE_PRIO], extack);
+ if (err)
+ return err;
+ }
+
return 0;
}
diff --git a/drivers/net/bonding/bond_options.c b/drivers/net/bonding/bond_options.c
index 96eef19cffc4..3498db1c1b3c 100644
--- a/drivers/net/bonding/bond_options.c
+++ b/drivers/net/bonding/bond_options.c
@@ -40,6 +40,8 @@ static int bond_option_arp_validate_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_arp_all_targets_set(struct bonding *bond,
const struct bond_opt_value *newval);
+static int bond_option_prio_set(struct bonding *bond,
+ const struct bond_opt_value *newval);
static int bond_option_primary_set(struct bonding *bond,
const struct bond_opt_value *newval);
static int bond_option_primary_reselect_set(struct bonding *bond,
@@ -365,6 +367,16 @@ static const struct bond_option bond_opts[BOND_OPT_LAST] = {
.values = bond_intmax_tbl,
.set = bond_option_miimon_set
},
+ [BOND_OPT_PRIO] = {
+ .id = BOND_OPT_PRIO,
+ .name = "prio",
+ .desc = "Link priority for failover re-selection",
+ .flags = BOND_OPTFLAG_RAWVAL,
+ .unsuppmodes = BOND_MODE_ALL_EX(BIT(BOND_MODE_ACTIVEBACKUP) |
+ BIT(BOND_MODE_TLB) |
+ BIT(BOND_MODE_ALB)),
+ .set = bond_option_prio_set
+ },
[BOND_OPT_PRIMARY] = {
.id = BOND_OPT_PRIMARY,
.name = "primary",
@@ -1306,6 +1318,27 @@ static int bond_option_missed_max_set(struct bonding *bond,
return 0;
}
+static int bond_option_prio_set(struct bonding *bond,
+ const struct bond_opt_value *newval)
+{
+ struct slave *slave;
+
+ slave = bond_slave_get_rtnl(newval->slave_dev);
+ if (!slave) {
+ netdev_dbg(newval->slave_dev, "%s called on NULL slave\n", __func__);
+ return -ENODEV;
+ }
+ slave->prio = newval->value;
+
+ if (rtnl_dereference(bond->primary_slave))
+ slave_warn(bond->dev, slave->dev,
+ "prio updated, but will not affect failover re-selection as primary slave have been set\n");
+ else
+ bond_select_active_slave(bond);
+
+ return 0;
+}
+
static int bond_option_primary_set(struct bonding *bond,
const struct bond_opt_value *newval)
{
diff --git a/include/net/bond_options.h b/include/net/bond_options.h
index eade8236a4df..d2aea5cf1e41 100644
--- a/include/net/bond_options.h
+++ b/include/net/bond_options.h
@@ -67,6 +67,7 @@ enum {
BOND_OPT_LACP_ACTIVE,
BOND_OPT_MISSED_MAX,
BOND_OPT_NS_TARGETS,
+ BOND_OPT_PRIO,
BOND_OPT_LAST
};
diff --git a/include/net/bonding.h b/include/net/bonding.h
index cb904d356e31..6e78d657aa05 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -178,6 +178,7 @@ 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 5f58dcfe2787..e36d9d2c65a7 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -963,6 +963,7 @@ 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 b339bf2196ca..0242f31e339c 100644
--- a/tools/include/uapi/linux/if_link.h
+++ b/tools/include/uapi/linux/if_link.h
@@ -890,6 +890,7 @@ 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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