[PATCH iproute2-next v6] ip/bond: add lacp_strict support
From: Louis Scalbert <hidden>
Date: 2026-08-20 16:43:58
Subsystem:
the rest · Maintainer:
Linus Torvalds
lacp_strict defines the behavior of a LACP bonding interface when no slaves are in Collecting_Distributing state while at least 'min_links' slaves have carrier. In the default (off) mode, the bonding master remains up and a single slave is selected for TX/RX, while traffic received on other slaves is dropped. This preserves the existing behavior. In lacp_strict mode, the bonding master reports carrier down in this situation. Link: https://lore.kernel.org/netdev/20260603150331.1919611-1-louis.scalbert@6wind.com/ (local) Signed-off-by: Louis Scalbert <redacted> --- ip/iplink_bond.c | 13 +++++++++++++ 1 file changed, 13 insertions(+)
diff --git a/ip/iplink_bond.c b/ip/iplink_bond.c
index 714fe7bd..3e8a964e 100644
--- a/ip/iplink_bond.c
+++ b/ip/iplink_bond.c@@ -155,6 +155,7 @@ static void print_explain(FILE *f) " [ ad_user_port_key PORTKEY ]\n" " [ ad_actor_sys_prio SYSPRIO ]\n" " [ ad_actor_system LLADDR ]\n" + " [ lacp_strict LACP_STRICT ]\n" " [ arp_missed_max MISSED_MAX ]\n" "\n" "BONDMODE := balance-rr|active-backup|balance-xor|broadcast|802.3ad|balance-tlb|balance-alb\n"
@@ -168,6 +169,7 @@ static void print_explain(FILE *f) "AD_SELECT := stable|bandwidth|count\n" "COUPLED_CONTROL := off|on\n" "BROADCAST_NEIGHBOR := off|on\n" + "LACP_STRICT := off|on\n" ); }
@@ -188,6 +190,7 @@ static int bond_parse_opt(struct link_util *lu, int argc, char **argv, __u32 packets_per_slave; __u8 missed_max; __u8 broadcast_neighbor; + __u8 lacp_strict; unsigned int ifindex; int ret;
@@ -417,6 +420,12 @@ static int bond_parse_opt(struct link_util *lu, int argc, char **argv, return -1; addattr_l(n, 1024, IFLA_BOND_AD_ACTOR_SYSTEM, abuf, len); + } else if (matches(*argv, "lacp_strict") == 0) { + NEXT_ARG(); + lacp_strict = parse_on_off("lacp_strict", *argv, &ret); + if (ret) + return ret; + addattr8(n, 1024, IFLA_BOND_LACP_STRICT, lacp_strict); } else if (matches(*argv, "tlb_dynamic_lb") == 0) { NEXT_ARG(); if (get_u8(&tlb_dynamic_lb, *argv, 0)) {
@@ -642,6 +651,10 @@ static void bond_print_opt(struct link_util *lu, FILE *f, struct rtattr *tb[]) "all_slaves_active %u ", rta_getattr_u8(tb[IFLA_BOND_ALL_SLAVES_ACTIVE])); + if (tb[IFLA_BOND_LACP_STRICT]) + print_on_off(PRINT_ANY, "lacp_strict", "lacp_strict %s ", + rta_getattr_u8(tb[IFLA_BOND_LACP_STRICT])); + if (tb[IFLA_BOND_MIN_LINKS]) print_uint(PRINT_ANY, "min_links",
--
2.39.2