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Message-ID: <20250714225533.1490032-7-wilder@us.ibm.com>
Date: Mon, 14 Jul 2025 15:54:51 -0700
From: David Wilder <wilder@...ibm.com>
To: netdev@...r.kernel.org
Cc: jv@...sburgh.net, wilder@...ibm.com, pradeeps@...ux.vnet.ibm.com,
        pradeep@...ibm.com, i.maximets@....org, amorenoz@...hat.com,
        haliu@...hat.com
Subject: [PATCH net-next v5 6/7] bonding: Update for extended arp_ip_target format.

Updated bond_fill_info() to support extended arp_ip_target format.

Forward and backward compatibility between the kernel and iprout2 is
preserved.

Signed-off-by: David Wilder <wilder@...ibm.com>
---
 drivers/net/bonding/bond_netlink.c | 28 ++++++++++++++++++++++++++--
 include/net/bonding.h              |  1 +
 2 files changed, 27 insertions(+), 2 deletions(-)

diff --git a/drivers/net/bonding/bond_netlink.c b/drivers/net/bonding/bond_netlink.c
index 5486ef40907e..6e8aebe5629f 100644
--- a/drivers/net/bonding/bond_netlink.c
+++ b/drivers/net/bonding/bond_netlink.c
@@ -701,8 +701,32 @@ static int bond_fill_info(struct sk_buff *skb,
 
 	targets_added = 0;
 	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++) {
-		if (bond->params.arp_targets[i].target_ip) {
-			if (nla_put_be32(skb, i, bond->params.arp_targets[i].target_ip))
+		struct bond_arp_target *target = &bond->params.arp_targets[i];
+		struct Data {
+			__u32 addr;
+			struct bond_vlan_tag vlans[BOND_MAX_VLAN_TAGS + 1];
+		} data;
+		int size = 0;
+
+		if (target->target_ip) {
+			data.addr = target->target_ip;
+			size = sizeof(target->target_ip);
+		}
+
+		for (int level = 0; target->flags & BOND_TARGET_USERTAGS && target->tags; level++) {
+			if (level > BOND_MAX_VLAN_TAGS)
+				goto nla_put_failure;
+
+			memcpy(&data.vlans[level], &target->tags[level],
+			       sizeof(struct bond_vlan_tag));
+			size = size + sizeof(struct bond_vlan_tag);
+
+			if (target->tags[level].vlan_proto == BOND_VLAN_PROTO_NONE)
+				break;
+		}
+
+		if (size) {
+			if (nla_put(skb, i, size, &data))
 				goto nla_put_failure;
 			targets_added = 1;
 		}
diff --git a/include/net/bonding.h b/include/net/bonding.h
index 1989b71ffa16..2502cf8428b3 100644
--- a/include/net/bonding.h
+++ b/include/net/bonding.h
@@ -811,6 +811,7 @@ static inline netdev_tx_t bond_tx_drop(struct net_device *dev, struct sk_buff *s
 
 /* Helpers for handling arp_ip_target */
 #define BOND_OPTION_STRING_MAX_SIZE 64
+#define BOND_MAX_VLAN_TAGS 5
 #define BOND_VLAN_PROTO_NONE cpu_to_be16(0xffff)
 
 static inline char *bond_arp_target_to_string(struct bond_arp_target *target,
-- 
2.43.5


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