[Qemu-devel] [PATCH v8 0/3] NBD reconnect

[Vladimir Sementsov-Ogievskiy]

Hi all!
Here is NBD reconnect. Previously, if connection failed all current
and future requests will fail. After the series, nbd-client driver
will try to reconnect unlimited times. During first @reconnect-delay
seconds of reconnecting all requests will wait for the connection,
and if it is established requests will be resent. After
@reconnect-delay period all requests will be failed (until successful
reconnect).

v8:
preparations are already merged [thx to Eric], old 07 with SI_* constants
dropped [Peter]
02: - use NANOSECONDS_PER_SECOND
03: - move to tests/qemu-iotests/264
    - limit job speed, otherwise it fails on ramfs as backup finishes too early

v7:
almost all: rebased on merged nbd.c and nbd-client.c (including patch subject)
01-04: add Eric's r-b
04: wording
05: new
06: rewrite to remove timer earlier
07: new
08:
 - rebase on 05 and 07
 - drop "All rights reserved"
 - handle drain
 - improve handling aio context attach
09: move 249 -> 257

Vladimir Sementsov-Ogievskiy (3):
  qemu-coroutine-sleep: introduce qemu_co_sleep_wake
  block/nbd: nbd reconnect
  iotests: test nbd reconnect

 include/qemu/coroutine.h      |  17 +-
 block/nbd.c                   | 335 +++++++++++++++++++++++++++-------
 block/null.c                  |   2 +-
 block/sheepdog.c              |   2 +-
 tests/test-bdrv-drain.c       |   6 +-
 tests/test-block-iothread.c   |   2 +-
 util/qemu-coroutine-sleep.c   |  47 +++--
 tests/qemu-iotests/264        |  65 +++++++
 tests/qemu-iotests/264.out    |  12 ++
 tests/qemu-iotests/group      |   1 +
 tests/qemu-iotests/iotests.py |   4 +
 11 files changed, 408 insertions(+), 85 deletions(-)
 create mode 100755 tests/qemu-iotests/264
 create mode 100644 tests/qemu-iotests/264.out

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2.18.0