https://github.com/torvalds/linux
Revision fd16eb948ea8b28afb03e11a5b11841e6ac2aa2b authored by Hangbin Liu on 30 August 2022, 09:37:21 UTC, committed by David S. Miller on 05 September 2022, 09:07:05 UTC
When a link is enslave to bond, it need to set the interface down first.
This makes the slave remove mac multicast address 33:33:00:00:00:01(The
IPv6 multicast address ff02::1 is kept even when the interface down). When
bond set the slave up, ipv6_mc_up() was not called due to commit c2edacf80e15
("bonding / ipv6: no addrconf for slaves separately from master").

This is not an issue before we adding the lladdr target feature for bonding,
as the mac multicast address will be added back when bond interface up and
join group ff02::1.

But after adding lladdr target feature for bonding. When user set a lladdr
target, the unsolicited NA message with all-nodes multicast dest will be
dropped as the slave interface never add 33:33:00:00:00:01 back.

Fix this by calling ipv6_mc_up() to add 33:33:00:00:00:01 back when
the slave interface up.

Reported-by: LiLiang <liali@redhat.com>
Fixes: 5e1eeef69c0f ("bonding: NS target should accept link local address")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 parent b7f1413
History
Tip revision: fd16eb948ea8b28afb03e11a5b11841e6ac2aa2b authored by Hangbin Liu on 30 August 2022, 09:37:21 UTC
bonding: add all node mcast address when slave up
Tip revision: fd16eb9
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