[PATCH net-next v3 0/7] netconsole: validate a target's IP address configuration

This series adds two validations to the target configuration when the
user tries to enable it: first whether remote_ip was set, and second
whether local_ip and remote_ip address families match. Refuse to enable
the target if any of those validations fail.

These validations are already done for the target passed on the
command-line, so this aligns dynamic targets with the command-line
behavior.

The first two patches replace the per-target 'ipv6' flag with a
per-address 'family' field, which makes it easier to detect these error
conditions. Patches 3 and 4 implement the actual validations.

Patches 5-7 are follow-ups from previous reviews: move inet_addr from
netpoll.h into netconsole.c, show an unset address as an empty string
rather than "0.0.0.0", document local_ip auto-selection.

Signed-off-by: Gustavo Luiz Duarte <[email protected]>
---
Changes in v3:
- Document local_ip auto-selection
- Link to v2: https://patch.msgid.link/[email protected]

Changes in v2:
- Show empty string in configfs for an unset IP address
- Moved inet_addr definition from netpoll.h to netconsole.c
- Moved address checks out of rtnl_lock()
- Link to v1: https://patch.msgid.link/[email protected]

To: Breno Leitao <[email protected]>
To: Andrew Lunn <[email protected]>
To: "David S. Miller" <[email protected]>
To: Eric Dumazet <[email protected]>
To: Jakub Kicinski <[email protected]>
To: Paolo Abeni <[email protected]>
To: Simon Horman <[email protected]>
To: Jonathan Corbet <[email protected]>
To: Shuah Khan <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

---
Gustavo Luiz Duarte (7):
      netconsole: add an address family to struct inet_addr
      netconsole: use the address family instead of the ipv6 flag
      netconsole: reject enabling a target with no remote IP address
      netconsole: reject a target mixing IPv4 and IPv6 addresses
      netconsole: show empty string for an unset IP address
      netconsole: move struct inet_addr into netconsole.c
      docs: netconsole: document local_ip auto-selection

 Documentation/networking/netconsole.rst |   5 ++
 drivers/net/netconsole.c                | 132 ++++++++++++++++----------------
 include/linux/netpoll.h                 |   5 --
 3 files changed, 70 insertions(+), 72 deletions(-)
---
base-commit: 4f93b12cf7b25fbf8e73d222722805b049f0a6d3
change-id: 20260730-netcons_ipv6-565d55f55729

Best regards,
--  
Gustavo Luiz Duarte <[email protected]>