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=== Add support for checkpoint/restore of CORK-ed UDP socket ===
−
−'''Summary:''' Support C/R of corked UDP socket
−
−There's UDP_CORK option for sockets. As man page says:
−<pre>
− If this option is enabled, then all data output on this socket
− is accumulated into a single datagram that is transmitted when
− the option is disabled. This option should not be used in
− code intended to be portable.
−</pre>
−Currently criu refuses to dump this case, so it's effectively a bug. Supporting
−this will need extending the kernel API to allow criu read back the write queue
−of the socket (see [[TCP connection|how it's done]] for TCP sockets, for example). Then
−the queue is written into the image and is restored into the socket (with the CORK
−bit set too).
−
−'''Links:'''
−* https://github.com/checkpoint-restore/criu/issues/409
−* https://github.com/criupatchwork/criu/commit/a532312
−* [[Sockets]], [[TCP connection]]
−* [[https://groups.google.com/forum/#!topic/comp.os.linux.networking/Uz8PYiTCZSg UDP cork explained]]
−
−'''Details:'''
−* Skill level: intermediate (+linux kernel)
−* Language: C
−* Expected size: 350 hours
−* Mentors: Alexander Mikhalitsyn <alexander@mihalicyn.com>, Pavel Tikhomirov <ptikhomirov@virtuozzo.com>, Andrei Vagin <avagin@gmail.com>
* Suggested by: Andrei Vagin <avagin@gmail.com>
* Suggested by: Andrei Vagin <avagin@gmail.com>
* Mentors: Alexander Mikhalitsyn <alexander@mihalicyn.com>, Andrei Vagin <avagin@gmail.com>
* Mentors: Alexander Mikhalitsyn <alexander@mihalicyn.com>, Andrei Vagin <avagin@gmail.com>
−=== Use eBPF to lock and unlock the network ===
=== Use eBPF to lock and unlock the network ===