Merge branch 'net-sched-use-the-backlog-for-nested-mirred-ingress'

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Davide Caratti says:

====================
net/sched: use the backlog for nested mirred ingress

TC mirred has a protection against excessive stack growth, but that
protection doesn't really guarantee the absence of recursion, nor
it guards against loops. Patch 1/2 rewords "recursion" to "nesting" to
make this more clear.
We can leverage on this existing mechanism to prevent TCP / SCTP from doing
soft lock-up in some specific scenarios that uses mirred egress->ingress:
patch 2 changes mirred so that the networking backlog is used for nested
mirred ingress actions.
====================

Link: https://lore.kernel.org/r/cover.1674233458.git.dcaratti@redhat.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

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Paolo Abeni 2023-01-24 10:30:56 +01:00

parent 5cf6c22b5b ca22da2fbd

commit d961bee454

2 changed files with 63 additions and 9 deletions

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23

net/sched/act_mirred.c

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49

tools/testing/selftests/net/forwarding/tc_actions.sh

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