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TCP repair feature in the Linux kernel is supposed to help migrating a TCP socket. It's not yet complete and this page lists what is to be done.
TCP repair feature in the Linux kernel is supposed to help migrating a TCP socket. It's not yet complete and this page lists what is to be done.
; Optimized restore
; Optimized restore
; Shutdown sockets repair
; Shutdown sockets repair
: Need to place checks in the inet shutdown code similar to those on connect/sendmsg paths.
: Need to place checks in the inet shutdown code similar to those on connect/sendmsg paths.
== Done stuff ==
; Transitional states
: Fixed in [[Download/criu/2.10|2.10]]
Old description:
Currently we support sockets in ''closed'' and ''establised'' states. However, if a socket is in e.g. ''syn-sent'' state the process of turning it into ''established'' can last long. We should teach the kernel and criu to checkpoint and restore this and other states.
The half-opened connections on the server side can be dropped dump-time with the <code>--skip-in-flight</code> option. This helps in heavily loaded cases when such sockets appear often.
; Connection tracking
; Connection tracking
: The nf_conntrack thing in the kernel is about to be live-migrated too. There's currently an API for getting the conntrack info (/proc file), but no such for restoring it by hands.
: Fixed in [[Download/criu/2.0|2.0]]
Old description:
The nf_conntrack thing in the kernel is about to be live-migrated too. There's currently an API for getting the conntrack info (/proc file), but no such for restoring it by hands.
[[Category:Plans]]
[[Category:Plans]]
[[Category:Network]]
[[Category:Network]]
[[Category:Fly in the ointment]]
[[Category:Fly in the ointment]]