Merge branch 'hsr-lockless-hsr_fill_info'

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Eric Dumazet says:

====================
hsr: lockless hsr_fill_info()

hsr_fill_info() currently relies on RTNL being held, because
hsr_port_get_hsr() walks hsr->ports with hsr_for_each_port_rtnl().

- Patch 1 annotates the data-race around hsr->sequence_nr, which
  is incremented from the transmit paths under hsr->seqnr_lock but
  read without it.

- Patch 2 converts hsr_fill_info() to RCU, using a local RCU
  variant of hsr_port_get_hsr().

hsr->ports is already an RCU protected list: ports are added with
list_add_tail_rcu(), removed with list_del_rcu() and freed with
kfree_rcu(), and the data path already iterates over it with
hsr_for_each_port().

This is part of a larger effort to remove the RTNL dependency from
rtnl_link_ops->fill_info().
====================

Link: https://patch.msgid.link/20260916132822.1791040-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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This commit is contained in:

Jakub Kicinski 2026-09-18 16:50:41 -07:00

parent 4090fcee93 9f8b888ced

commit 8ecce29409

3 changed files with 28 additions and 11 deletions

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2

net/hsr/hsr_device.c

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2

net/hsr/hsr_forward.c

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37

net/hsr/hsr_netlink.c

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