[PATCH v13 0/6] State migration, kind of draft again

[Stefano Brivio <sbrivio@redhat.com>]

Some concerns came to my mind during the weekend and now I tried
a bit quickly to fix them. A couple of functions became horrible
as a result.

More tests: IPv6 too, iperf3 inbound and outbound.

From another read of:
  https://github.com/checkpoint-restore/criu/blob/criu-dev/soccr/soccr.c
I noticed that the way I was dumping and restoring queues
was almost entirely bogus. It should be fixed now. Handling of
FIN might be needed, though: we might have an off-by-one when we
restore queues, I guess.

Riddle of this version: enabling the flow_migrate_source_early()
callback (shrinking the window early on) breaks things if I run
the source without strace: the source (I think? sends a reset
when we close the sockets after we switch repair mode on the
second time (we flip that twice).

So it's commented out for the moment. By itself, it works, and
effectively limits what the peer sends during migration.

There must be some other race or issue in passt-repair or in the
matching interface, but I couldn't figure it out.

David Gibson (1):
  migrate: Migrate guest observed addresses

Stefano Brivio (5):
  migrate: Skeleton of live migration logic
  Add interfaces and configuration bits for passt-repair
  vhost_user: Make source quit after reporting migration state
  migrate: Migrate TCP flows
  test: Add migration tests

 Makefile                   |  14 +-
 conf.c                     |  44 ++-
 epoll_type.h               |   6 +-
 flow.c                     | 248 ++++++++++++
 flow.h                     |   8 +
 migrate.c                  | 309 +++++++++++++++
 migrate.h                  |  54 +++
 passt.1                    |  11 +
 passt.c                    |  21 +-
 passt.h                    |  15 +
 repair.c                   | 211 ++++++++++
 repair.h                   |  16 +
 tap.c                      |  65 +--
 tcp.c                      | 789 +++++++++++++++++++++++++++++++++++++
 tcp_conn.h                 |  95 +++++
 test/lib/layout            |  55 ++-
 test/lib/setup             | 134 +++++++
 test/lib/test              |  48 +++
 test/migrate/basic         |  59 +++
 test/migrate/bidirectional |  64 +++
 test/migrate/iperf3_in4    |  50 +++
 test/migrate/iperf3_in6    |  58 +++
 test/migrate/iperf3_out4   |  50 +++
 test/migrate/iperf3_out6   |  58 +++
 test/run                   |  10 +
 util.c                     |  62 +++
 util.h                     |  30 ++
 vhost_user.c               |  68 +---
 virtio.h                   |   4 -
 vu_common.c                |  49 +--
 vu_common.h                |   2 +-
 31 files changed, 2524 insertions(+), 183 deletions(-)
 create mode 100644 migrate.c
 create mode 100644 migrate.h
 create mode 100644 repair.c
 create mode 100644 repair.h
 create mode 100644 test/migrate/basic
 create mode 100644 test/migrate/bidirectional
 create mode 100644 test/migrate/iperf3_in4
 create mode 100644 test/migrate/iperf3_in6
 create mode 100644 test/migrate/iperf3_out4
 create mode 100644 test/migrate/iperf3_out6

-- 
2.43.0