net: bridge: vlan: cache the pvid vlan entry directly

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VLAN groups cache the pvid and its state separately requiring state
updates to keep both copies synchronized. Lockless readers can also
observe the pvid and state from different updates. Cache an rcu protected
pointer to the pvid vlan entry instead. This makes the vlan entry the
single source of truth and lets the ingress path reuse it without another
lookup. It also makes the vlan entry always available at the ingress path
for subsequent forwarding-path optimizations.

Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260918152950.1938259-4-razor@blackwall.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

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Nikolay Aleksandrov 2026-09-18 18:29:44 +03:00 • committed by Jakub Kicinski

parent 25622bef88

commit b82e41db00

4 changed files with 46 additions and 80 deletions

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13

net/bridge/br_mst.c

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25

net/bridge/br_private.h

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76

net/bridge/br_vlan.c

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12

net/bridge/br_vlan_options.c

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