[Qemu-devel] [PATCH v5 00/15] block: generic image streaming

[Stefan Hajnoczi]

Note: This is a resend of v5 because the emails I sent earlier today
disappeared.

This series adds the 'block_stream' command which copies the contents of a
backing file into the image file while the VM is running.  The series builds on
the zero detection features which I sent out before Christmas. I suggest
grabbing my git tree to try it out without merging this dependency:

https://github.com/stefanha/qemu/tree/image-streaming-api

The image streaming HMP/QMP commands are documented in the patch and also
described here:

http://wiki.qemu.org/Features/LiveBlockMigration/ImageStreamingAPI

The basic idea is to execute 'block_stream virtio0' while the guest is running.
Progress can be monitored using 'info block-jobs'.  When the streaming
operation completes it raises a QMP event.

Note: The last patch includes includes a Python test script called
test-stream.py, I do not propose to merge it.  When run in a QEMU source tree
it performs basic image streaming QMP tests.

v5:
 * Handle block_job_create() failure [Luiz]
 * Mark BLOCK_JOB_COMPLETED error field optional [Luiz]
 * Mark block_stream base parameter optional [Luiz]
 * Check bdrv_getlength() failure and don't call twice [Kevin]
 * Rename "id" to "backing_file" in bdrv_find_backing_image() [Kevin]
 * Rename BaseIdNotFound qerror to BaseNotFound [Kevin]
 * Document BaseNotFound qerror from block_stream
 * Document that qemu_co_sleep_ns() needs main loop [Kevin]
 * Make bdrv_co_is_allocated_base() private to block/stream.c [Kevin]
 * Clean up commit messages

v4:
 * Drop SQMP/EQMP docs from qmp-commands.hx [Luiz]
 * Follow QAPI doc conventions [Luiz]
 * Document QMP events in QMP/qmp-events.txt [Luiz]
 * Protect against hotplug, resize, eject, etc [Kevin]
 * Move block job functions from header to block.c [Kevin]
 * Return error from bdrg_change_backing_file() [Kevin]
 * Merge Marcelo's block_stream base partial streaming series [Marcelo]

Marcelo Tosatti (4):
  block: add bdrv_find_backing_image
  add QERR_BASE_NOT_FOUND
  block: add support for partial streaming
  docs: describe live block operations

Stefan Hajnoczi (11):
  coroutine: add co_sleep_ns() coroutine sleep function
  block: check bdrv_in_use() before blockdev operations
  block: add BlockJob interface for long-running operations
  block: add image streaming block job
  block: rate-limit streaming operations
  qmp: add block_stream command
  qmp: add block_job_set_speed command
  qmp: add block_job_cancel command
  qmp: add query-block-jobs
  blockdev: make image streaming safe across hotplug
  test: add image streaming test cases

 Makefile.objs           |    2 +
 QMP/qmp-events.txt      |   53 ++++++++++
 block.c                 |   70 +++++++++++++
 block.h                 |    2 +
 block/stream.c          |  260 +++++++++++++++++++++++++++++++++++++++++++++++
 block_int.h             |   44 ++++++++
 blockdev.c              |  199 +++++++++++++++++++++++++++++++++++-
 docs/live-block-ops.txt |   58 +++++++++++
 hmp-commands.hx         |   41 ++++++++
 hmp.c                   |   68 ++++++++++++
 hmp.h                   |    4 +
 monitor.c               |   13 +++
 monitor.h               |    2 +
 qapi-schema.json        |  116 +++++++++++++++++++++
 qemu-coroutine-sleep.c  |   38 +++++++
 qemu-coroutine.h        |    9 ++
 qerror.c                |    8 ++
 qerror.h                |    6 +
 qmp-commands.hx         |   24 +++++
 test-stream.py          |  208 +++++++++++++++++++++++++++++++++++++
 trace-events            |    9 ++
 21 files changed, 1233 insertions(+), 1 deletions(-)
 create mode 100644 block/stream.c
 create mode 100644 docs/live-block-ops.txt
 create mode 100644 qemu-coroutine-sleep.c
 create mode 100644 test-stream.py

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1.7.7.3