[PATCH v2 00/11] Add support for fixed ram offsets during migration

[Nikolay Borisov]

Here's a slightly updated version of the patchset. In its core it remains
however I have addressed a couple of issue, namely :

* Don't initialize the shadow bitmap as all set - this was causing the full ram
to be copied always.

* Fixed a memory leak in parse_ramblocks_fixed_ram by making the dirty bitmap
variable an g_autofree one

* Slightly reworked how ram is being copied during restore and now the code is
working in chunks of 4mb (might have to tweak this?)

For a more general overview of what this series is all about refer to the
initial posting [0].

[0] 
20221004123733.2745519-1-nborisov@suse.com/">https://lore.kernel.org/qemu-devel/20221004123733.2745519-1-nborisov@suse.com/

Nikolay Borisov (11):
  migration: support file: uri for source migration
  migration: Add support for 'file:' uri for incoming migration
  migration: Make migration json writer part of MigrationState struct
  io: add pwritev support to QIOChannelFile
  io: Add support for seekable channels
  io: Add preadv support to QIOChannelFile
  migration: add qemu_get_buffer_at
  migration/ram: Introduce 'fixed-ram' migration stream capability
  migration: Refactor precopy ram loading code
  migration: Add support for 'fixed-ram' migration restore
  analyze-migration.py: add initial support for fixed ram streams

 include/exec/ramblock.h             |   7 +
 include/io/channel-file.h           |  10 +
 include/io/channel.h                |   1 +
 include/migration/qemu-file-types.h |   2 +
 io/channel-file.c                   |  55 +++++
 migration/file.c                    |  38 ++++
 migration/file.h                    |  10 +
 migration/meson.build               |   1 +
 migration/migration.c               |  61 +++++-
 migration/migration.h               |   6 +
 migration/qemu-file.c               |  82 +++++++
 migration/qemu-file.h               |   4 +
 migration/ram.c                     | 328 +++++++++++++++++++++-------
 migration/savevm.c                  |  39 ++--
 qapi/migration.json                 |   2 +-
 scripts/analyze-migration.py        |  49 ++++-
 16 files changed, 594 insertions(+), 101 deletions(-)
 create mode 100644 migration/file.c
 create mode 100644 migration/file.h

--
2.34.1