[PATCH v3 net-next 0/5] geneve: Allow binding UDP socket to a specific address.

[Kuniyuki Iwashima <kuniyu@google.com>]

By default, a GENEVE device bind()s its underlying UDP socket(s) to
the IPv4 or IPv6 wildcard address because there is no way to specify
a specific local IP address to bind() to.

This prevents deploying multiple GENEVE devices on a multi-homed host
where each device should be isolated and bound to a different local IP
address on the same UDP port.

This series introduces two options to specify local IPv4 or IPv6
addresses for a GENEVE device.

The corresponding iproute2 patch is here:
https://lore.kernel.org/netdev/20260523061102.2762452-1-kuniyu@google.com/


Changes:
  v3:
    * Patch 5 : Use NLA_POLICY_EXACT_LEN() for IFLA_GENEVE_LOCAL6.
                Mention source address in error messages in geneve_configure().

  v2: https://lore.kernel.org/netdev/20260525001745.1251640-1-kuniyu@google.com/
    * Patch 1 : Move addr_type to if-block for CONFIG_IPV6=n
    * Patch 4 : Don't set cfg->dualstack for IFLA_GENEVE_REMOTE6?
    * Patch 5 : Validate saddr in geneve_xmit_skb() and geneve6_xmit_skb().

  v1: https://lore.kernel.org/netdev/20260523061654.2767060-1-kuniyu@google.com/


Kuniyuki Iwashima (5):
  geneve: Reuse ipv6_addr_type() result in geneve_nl2info().
  geneve: Pass struct geneve_dev to geneve_create_sock().
  geneve: Pass struct geneve_dev to geneve_find_sock().
  geneve: Add dualstack flag to struct geneve_config.
  geneve: Introduce IFLA_GENEVE_LOCAL and IFLA_GENEVE_LOCAL6.

 drivers/net/geneve.c         | 242 ++++++++++++++++++++++++++++-------
 include/uapi/linux/if_link.h |   2 +
 2 files changed, 198 insertions(+), 46 deletions(-)

-- 
2.54.0.746.g67dd491aae-goog