nsna_ping EADDRNOTAVAIL

[Ivan Afonichev]

Hello
nsna_ping seems to convert target_host address to some multicast address and try to do
something with it which is failing:

[root@osho ~]# ps aux | grep team
root      475399  0.0  0.0   8580  4064 ?        S    01:35   0:00 /usr/bin/teamd -o -n -U
-D -N -t team0 -c { "runner": { "name": "activebackup" },
"link_watch": { "name": "nsna_ping",
"target_host": "fe80::1e98:ecff:febf:8000" } }
root      475970  0.0  0.0   6164  2256 pts/0    S+   01:47   0:00 grep --color=auto team
[root@osho ~]# LC_ALL=C strace -p 475399
strace: Process 475399 attached
pselect6(23, [3 9 10 14 15 16 19 20 22], [], [15], NULL, NULL) = 1 (in [22])
read(22, "\1\0\0\0\0\0\0\0", 8)         = 8
getsockname(20, {sa_family=AF_PACKET,
sa_data="\0\3\3\0\0\0\1\0\0\6<\354\357rE\327"}, [20 => 18]) = 0
sendto(21,
"\207\0\0\0\0\0\0\0\376\200\0\0\0\0\0\0\36\230\354\377\376\277\200\0\1\1<\354\357rE\327",
32, 0, {sa_family=AF_INET6, sin6_port=htons(0), sin6_flowinfo=htonl(0),
inet_pton(AF_INET6, "ff02::1:ffbf:8000", &sin6_addr),
sin6_scope_id=if_nametoindex("eno2np1")}, 28) = -1 EADDRNOTAVAIL (Cannot assign
requested address)
pselect6(23, [3 9 10 14 15 16 19 20 22], [], [15], NULL, NULL) = 1 (in [22])
read(22, "\1\0\0\0\0\0\0\0", 8)         = 8
getsockname(20, {sa_family=AF_PACKET,
sa_data="\0\3\3\0\0\0\1\0\0\6<\354\357rE\327"}, [20 => 18]) = 0
sendto(21,
"\207\0\0\0\0\0\0\0\376\200\0\0\0\0\0\0\36\230\354\377\376\277\200\0\1\1<\354\357rE\327",
32, 0, {sa_family=AF_INET6, sin6_port=htons(0), sin6_flowinfo=htonl(0),
inet_pton(AF_INET6, "ff02::1:ffbf:8000", &sin6_addr),
sin6_scope_id=if_nametoindex("eno2np1")}, 28) = -1 EADDRNOTAVAIL (Cannot assign
requested address)
pselect6(23, [3 9 10 14 15 16 19 20 22], [], [15], NULL, NULL) = 1 (in [22])
read(22, "\1\0\0\0\0\0\0\0", 8)         = 8
getsockname(20, {sa_family=AF_PACKET,
sa_data="\0\3\3\0\0\0\1\0\0\6<\354\357rE\327"}, [20 => 18]) = 0
sendto(21,
"\207\0\0\0\0\0\0\0\376\200\0\0\0\0\0\0\36\230\354\377\376\277\200\0\1\1<\354\357rE\327",
32, 0, {sa_family=AF_INET6, sin6_port=htons(0), sin6_flowinfo=htonl(0),
inet_pton(AF_INET6, "ff02::1:ffbf:8000", &sin6_addr),
sin6_scope_id=if_nametoindex("eno2np1")}, 28) = -1 EADDRNOTAVAIL (Cannot assign
requested address)
pselect6(23, [3 9 10 14 15 16 19 20 22], [], [15], NULL, NULL^Cstrace: Process 475399
detached
 <detached ...>

How is it intended to be working?

[Ivan Afonichev]

ok I see
https://lkml.org/lkml/2015/10/16/352

Strange that it is not mentioned in any teamd docs.

[Jiri Pirko]

Thu, Nov 04, 2021 at 10:17:09PM CET, ivan.afonichev(a)gmail.com wrote:
> ok I see
> https://lkml.org/lkml/2015/10/16/352 
I don't follow. The patch was not accepted. Why do you think that is an
issue?

>
>Strange that it is not mentioned in any teamd docs.
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[Ivan Afonichev]

Because currently I see no LL adresses on enslaved devices and I see
https://github.com/torvalds/linux/commit/744fdc8233f6aa9582ce08a51ca06e59...

Ideally I believe random address configuration should be allowed on enslaved devices
(addr_gen_mode 2 or 3) but currently it is totally disabled in addrconf logic as seen at
that commit.