From: Guillaume Nault <gnault@redhat.com>
To: David Miller <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Eric Dumazet <edumazet@google.com>
Cc: netdev@vger.kernel.org, Simon Horman <horms@kernel.org>,
David Ahern <dsahern@kernel.org>,
Antonio Quartulli <antonio@mandelbit.com>,
Ido Schimmel <idosch@idosch.org>,
Stanislav Fomichev <stfomichev@gmail.com>,
Petr Machata <petrm@nvidia.com>
Subject: [PATCH net 0/2] gre: Reapply IPv6 link-local address generation fix.
Date: Sat, 3 May 2025 00:57:45 +0200 [thread overview]
Message-ID: <cover.1746225213.git.gnault@redhat.com> (raw)
Reintroduce the IPv6 link-local address generation fix for GRE and its
kernel selftest. These patches were introduced by merge commit
b3fc5927de4b ("Merge branch
'gre-fix-regressions-in-ipv6-link-local-address-generation'") but have
been reverted by commit 8417db0be5bb ("Merge branch
'gre-revert-ipv6-link-local-address-fix'"), because it uncovered
another bug in multipath routing. Now that this bug has been
investigated and fixed, we can apply the GRE link-local address fix
and its kernel selftest again.
For convenience, here's the original cover letter:
IPv6 link-local address generation has some special cases for GRE
devices. This has led to several regressions in the past, and some of
them are still not fixed. This series fixes the remaining problems,
like the ipv6.conf.<dev>.addr_gen_mode sysctl being ignored and the
router discovery process not being started (see details in patch 1).
To avoid any further regressions, patch 2 adds selftests covering
IPv4 and IPv6 gre/gretap devices with all combinations of currently
supported addr_gen_mode values.
Guillaume Nault (2):
gre: Fix again IPv6 link-local address generation.
selftests: Add IPv6 link-local address generation tests for GRE
devices.
net/ipv6/addrconf.c | 15 +-
tools/testing/selftests/net/Makefile | 1 +
.../testing/selftests/net/gre_ipv6_lladdr.sh | 177 ++++++++++++++++++
3 files changed, 187 insertions(+), 6 deletions(-)
create mode 100755 tools/testing/selftests/net/gre_ipv6_lladdr.sh
--
2.39.2
next reply other threads:[~2025-05-02 22:57 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-02 22:57 Guillaume Nault [this message]
2025-05-02 22:57 ` [PATCH net 1/2] gre: Fix again IPv6 link-local address generation Guillaume Nault
2025-05-05 7:37 ` Ido Schimmel
2025-05-02 22:57 ` [PATCH net 2/2] selftests: Add IPv6 link-local address generation tests for GRE devices Guillaume Nault
2025-05-05 7:38 ` Ido Schimmel
2025-05-06 1:20 ` [PATCH net 0/2] gre: Reapply IPv6 link-local address generation fix patchwork-bot+netdevbpf
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