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[Qemu-devel] [PATCH v6 00/16] block: generic image streaming


From: Stefan Hajnoczi
Subject: [Qemu-devel] [PATCH v6 00/16] block: generic image streaming
Date: Wed, 18 Jan 2012 14:40:39 +0000

This series adds the 'block_stream' command which copies the contents of a
backing file into the image file while the VM is running.  These patches are
based on Kevin Wolf's block tree.  Previously this series was based on the zero
detection series but Kevin pointed out there is no hard dependency, so they are
now independent.

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.

v6:
 * Use per-request copy-on-read when doing partial streaming [Kevin]

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]

Luiz has reviewed the QMP/QAPI parts, which remain unchanged from v5.

Acked-by: Luiz Capitulino <address@hidden>

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 (12):
  coroutine: add co_sleep_ns() coroutine sleep function
  block: check bdrv_in_use() before blockdev operations
  block: make copy-on-read a per-request flag
  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                 |  119 +++++++++++++++++++--
 block.h                 |    4 +
 block/stream.c          |  269 +++++++++++++++++++++++++++++++++++++++++++++++
 block_int.h             |   47 ++++++++
 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            |   12 ++-
 21 files changed, 1287 insertions(+), 13 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

-- 
1.7.8.3




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