[Qemu-devel] [PATCH v3 0/5] Add QMP migration events

[Juan Quintela]

This is a resent with what we agreed on yesterday call.
Migration events would be there for 0.13 until we get proper
async command support.

Later, Juan.

v3:
- Add comment that MIGRATION_FAILURE will add a QError for 0.14
  (when we get internal support for that)
  rebase against today tree

v2:
- Address pbonzini and mst changes
  (error messages and doc fixes)

v1:

This series does:

- exit incoming migration on failure.  For exec/fd migrations, once
  there was a failure, there was nothing useful to do.  And for tcp
  migration, not exiting created interesting bugs when trying to
  migrate again to a process with a faild migration.

- Factorize common migration code, no more duplication, makes easier to do
  "global" migration things, like QMP events.

- Introduce QMP events, both for incoming and outgoing migration.


Now, the million dollar question: Why I didn't refactorize outgoing
migration?  I tried, and have it partially done on my local tree.  But
it depends (too much) of current_migration global variable -> Libvirt
folks will also want "info migrate" to work on the incoming side,
i.e. current_migraition has to also be updated on incoming side.  Done
until here, but then I hit the wall "incoming migration is synchronous".

To make the monitor work on incoming migration, we need to change
buffered_file.c abstraction to also work for incoming fd's, or another
similar solution.  I am open to suggestions about what to do here.

This series are quite simple (the unfinished part is more complex),
will send the other part as an RFC later.

Please review and consider to apply it.

Later, Juan.

Juan Quintela (5):
  Exit if incoming migration fails
  Factorize common migration incoming code
  QMP: Introduce MIGRATION events
  QMP: Emit migration events on incoming migration
  QMP: Emit migration events on outgoing migration

 QMP/qmp-events.txt |   52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 migration-exec.c   |   17 +++--------------
 migration-fd.c     |   15 ++-------------
 migration-tcp.c    |   17 ++++-------------
 migration-unix.c   |   17 ++++-------------
 migration.c        |   37 +++++++++++++++++++++++++++++++------
 migration.h        |    4 +++-
 monitor.c          |   12 ++++++++++++
 monitor.h          |    4 ++++
 vl.c               |    7 ++++++-
 10 files changed, 121 insertions(+), 61 deletions(-)