[PATCH batadv v2 0/9] batman-adv: tp_meter: unacked list/state fixes and optimization

As we all know, after the tp_meter fix is before the tp_meter fix. I've
started to go through some of the problems in the receiver code and noticed
even more things which were real bugs and some things which required
cleanup/optimization:

* limit the number of entries in the unacked list

  - using an actual limit
  - by avoiding (merging) new entries when adjacent to an older (smaller seqno) one
  - by merging with newer (smaller seqno) entries in case a recently
    received one closed a gap in the seqnos

* concurrency problems

  - fix next Ack packet seqno corruption due to missing locking of RMW
    operations
  - avoid compiler induced data races when handling last_recv_time

* various code cleanups

Signed-off-by: Sven Eckelmann <[email protected]>
---
Changes in v2:
- rebased
- add "delay allocation of unacked entry"
- add "adjust name of receiver lock"
- add "combine adjacent/overlapping unacked entries"
- add "simplify unordered ack calculation"
- add "handle overlapping packets"
- add "prevent parallel modifications of last_recv"
- add "annotate last_recv_time access with READ/WRITE_ONCE"
- Link to v1: https://patch.msgid.link/[email protected]

To: [email protected]

---
Sven Eckelmann (9):
      batman-adv: tp_meter: restrict number of unacked list entries
      batman-adv: tp_meter: annotate last_recv_time access with READ/WRITE_ONCE
      batman-adv: tp_meter: prevent parallel modifications of last_recv
      batman-adv: tp_meter: handle overlapping packets
      batman-adv: tp_meter: simplify unordered ack calculation
      batman-adv: tp_meter: combine adjacent/overlapping unacked entries
      batman-adv: tp_meter: keep unacked list for receivers
      batman-adv: tp_meter: adjust name of receiver lock
      batman-adv: tp_meter: delay allocation of unacked entry

 net/batman-adv/tp_meter.c | 255 +++++++++++++++++++++++++++++-----------------
 net/batman-adv/types.h    |  19 ++--
 2 files changed, 174 insertions(+), 100 deletions(-)
---
base-commit: 385b248dd4e46c4ce022adeb1b13e547d1954901
change-id: 20260610-tp-unacked-list-d6ba9d0117e5

Best regards,
--  
Sven Eckelmann <[email protected]>