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CNB: net: add support for managed neighbor entries

Ivan Vecera requested to merge ivecera/centos-stream-9:bz2193175 into main

Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2193175
Tested: Manually as described in BZ (comment #2 and #3)

Commits:

3dc20f4762c6 ("net, neigh: Enable state migration between NUD_PERMANENT and NTF_USE")
2c611ad97a82 ("net, neigh: Extend neigh->flags to 32 bit to allow for extensions")
7482e3841d52 ("net, neigh: Add NTF_MANAGED flag for managed neighbor entries")
507c2f1d2936 ("net, neigh: Add build-time assertion to avoid neigh->flags overflow")
30fc7efa38f2 ("net, neigh: Reject creating NUD_PERMANENT with NTF_MANAGED entries")
4177d5b017a7 ("net, neigh: Fix crash in v6 module initialization error path")
4a81f6da9cb2 ("net, neigh: Do not trigger immediate probes on NUD_FAILED from neigh_managed_work")

Signed-off-by: Ivan Vecera ivecera@redhat.com

Edited by Ivan Vecera

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