[PATCH v3 00/14] File-based migration support and fixed-ram features

[Nikolay Borisov]

Here's the 3rd version of file-based migration support [0]. For background
check the cover letter of the initial. The main changes are :

- Updated commit message as per Daniel Berrange's suggestino for Patches 1-2

- Fixed tab in various pages

- Added comments better explaining how json_writer_start_object in
qemu_savevm_state_header is matched and also squashed the analyze-migration.py
parts into patch 3

- Reworked the way pwritv/preadv are introduced. Now there are generic
callbacks in QIOChannel that are implemented for the QIOChannelFile.

- Separated the introduction of QEMUFile-related helpers from the patch
introducing the io interfaces.

- Added qtests for the file-based migration as well as for the fixed-ram
feature.

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

Nikolay Borisov (14):
  migration: support file: uri for source migration
  migration: Add support for 'file:' uri for incoming migration
  migration: Initial support of fixed-ram feature for
    analyze-migration.py
  io: Add generic pwritev/preadv interface
  io: implement io_pwritev for QIOChannelFile
  io: add and implement QIO_CHANNEL_FEATURE_SEEKABLE for channel file
  migration/qemu-file: add utility methods for working with 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
  tests: Add migrate_incoming_qmp helper
  tests/qtest: migration-test: Add tests for file-based migration

 include/exec/ramblock.h             |   7 +
 include/io/channel.h                |  50 +++++
 include/migration/qemu-file-types.h |   2 +
 io/channel-file.c                   |  61 ++++++
 io/channel.c                        |  26 +++
 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                  |  48 ++--
 qapi/migration.json                 |   2 +-
 scripts/analyze-migration.py        |  49 ++++-
 tests/qtest/migration-helpers.c     |  19 ++
 tests/qtest/migration-helpers.h     |   4 +
 tests/qtest/migration-test.c        |  46 ++++
 19 files changed, 743 insertions(+), 101 deletions(-)
 create mode 100644 migration/file.c
 create mode 100644 migration/file.h

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2.34.1