From: Hangbin Liu liuhangbin@gmail.com
[ Upstream commit 4598380f9c548aa161eb4e990a1583f0a7d1e0d7 ]
When arp_validate is set to 2, 3, or 6, validation is performed for backup slaves as well. As stated in the bond documentation, validation involves checking the broadcast ARP request sent out via the active slave. This helps determine which slaves are more likely to function in the event of an active slave failure.
However, when the target is an IPv6 address, the NS message sent from the active interface is not checked on backup slaves. Additionally, based on the bond_arp_rcv() rule b, we must reverse the saddr and daddr when checking the NS message.
Note that when checking the NS message, the destination address is a multicast address. Therefore, we must convert the target address to solicited multicast in the bond_get_targets_ip6() function.
Prior to the fix, the backup slaves had a mii status of "down", but after the fix, all of the slaves' mii status was updated to "UP".
Fixes: 4e24be018eb9 ("bonding: add new parameter ns_targets") Reviewed-by: Jonathan Toppins jtoppins@redhat.com Acked-by: Jay Vosburgh jay.vosburgh@canonical.com Signed-off-by: Hangbin Liu liuhangbin@gmail.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/bonding/bond_main.c | 5 +++-- include/net/bonding.h | 8 ++++++-- 2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 45d3cb557de73..9f6824a6537bc 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -3266,7 +3266,8 @@ static int bond_na_rcv(const struct sk_buff *skb, struct bonding *bond,
combined = skb_header_pointer(skb, 0, sizeof(_combined), &_combined); if (!combined || combined->ip6.nexthdr != NEXTHDR_ICMP || - combined->icmp6.icmp6_type != NDISC_NEIGHBOUR_ADVERTISEMENT) + (combined->icmp6.icmp6_type != NDISC_NEIGHBOUR_SOLICITATION && + combined->icmp6.icmp6_type != NDISC_NEIGHBOUR_ADVERTISEMENT)) goto out;
saddr = &combined->ip6.saddr; @@ -3288,7 +3289,7 @@ static int bond_na_rcv(const struct sk_buff *skb, struct bonding *bond, else if (curr_active_slave && time_after(slave_last_rx(bond, curr_active_slave), curr_active_slave->last_link_up)) - bond_validate_na(bond, slave, saddr, daddr); + bond_validate_na(bond, slave, daddr, saddr); else if (curr_arp_slave && bond_time_in_interval(bond, slave_last_tx(curr_arp_slave), 1)) bond_validate_na(bond, slave, saddr, daddr); diff --git a/include/net/bonding.h b/include/net/bonding.h index e999f851738bd..768348008d0c9 100644 --- a/include/net/bonding.h +++ b/include/net/bonding.h @@ -765,13 +765,17 @@ static inline int bond_get_targets_ip(__be32 *targets, __be32 ip) #if IS_ENABLED(CONFIG_IPV6) static inline int bond_get_targets_ip6(struct in6_addr *targets, struct in6_addr *ip) { + struct in6_addr mcaddr; int i;
- for (i = 0; i < BOND_MAX_NS_TARGETS; i++) - if (ipv6_addr_equal(&targets[i], ip)) + for (i = 0; i < BOND_MAX_NS_TARGETS; i++) { + addrconf_addr_solict_mult(&targets[i], &mcaddr); + if ((ipv6_addr_equal(&targets[i], ip)) || + (ipv6_addr_equal(&mcaddr, ip))) return i; else if (ipv6_addr_any(&targets[i])) break; + }
return -1; }