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bonding: no longer rely on RTNL in bond_fill_info()

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Add READ_ONCE()/WRITE_ONCE() annotations on port->is_enabled.
While this field is written under bond->mode_lock protection,
is is read without this lock being held.

Change bond_fill_info() to acquire RCU and use READ_ONCE()
to read bond->params fields that can be updated concurrently
from sysfs/procfs/rtnetlink.

Add const qualifiers to bond_uses_primary(), __agg_active_ports(),
bond_option_active_slave_get_rcu(), bond_3ad_get_active_agg_info(),
__bond_3ad_get_active_agg_info() helpers.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Jay Vosburgh <jv@jvosburgh.net>
Cc: Andrew Lunn <andrew+netdev@lunn.ch>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260629173200.469953-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Eric Dumazet 2026-06-29 17:32:00 +00:00 • committed by Jakub Kicinski
commit 317cefdcaa
5 changed files with 85 additions and 68 deletions
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