vtnet: Fix an LOR in the input path #97
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if_vtnet holds a queue lock when processing incoming packets. It sends them up the stack without dropping the lock, which is incorrect. For example, witness generates warnings when if_vtnet receives ND6 packets. Simply drop the lock before entering the network stack. We could batch this by linking a small number of packets using m_nextpkt; ether_input() handles such batches.
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if_vtnet holds a queue lock when processing incoming packets. It sends them up the stack without dropping the lock, which is incorrect. For example, witness generates warnings when if_vtnet receives ND6 packets.
Simply drop the lock before entering the network stack. We could batch this by linking a small number of packets using m_nextpkt; ether_input() handles such batches.
https://reviews.freebsd.org/D45950
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253888