[sheepdog] [PATCH v2 0/6] support online snapshot from collie and qemu-img

[MORITA Kazutaka]

v2:
 - rebased on top of my patch 'remove sd_*_req and sd_*_rsp'
 - fix SD_RES_NO_VDI error
 - add test

This series makes sheep return SD_RES_READONLY when write requests are
sent to the snapshot data objects, and notifies the running VMs that
they need to reload the vdi objects.

MORITA Kazutaka (6):
  move vdi_is_snapshot() to sheepdog_proto.h
  sheep: make oid_to_vid support any kind of objects
  sheep: store snapshot vid information in memory
  sheep: return SD_RES_READONLY when write requests are sent to
    snapshots
  sheep: make SD_OP_GET_INFO a cluster operation
  tests: add test to check live snapshot

 collie/common.c          |   7 +--
 collie/node.c            |   2 +-
 collie/vdi.c             |  20 ++++----
 include/sheep.h          |   6 +--
 include/sheepdog_proto.h |  17 +++++--
 sheep/gateway.c          |  10 ++++
 sheep/group.c            |  14 ++---
 sheep/ops.c              |  23 +++++----
 sheep/plain_store.c      |   7 +--
 sheep/sheep_priv.h       |  12 ++++-
 sheep/vdi.c              | 129 ++++++++++++++++++++++++++---------------------
 tests/059                |  45 +++++++++++++++++
 tests/059.out            |  25 +++++++++
 tests/group              |   1 +
 14 files changed, 211 insertions(+), 107 deletions(-)
 create mode 100755 tests/059
 create mode 100644 tests/059.out

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1.8.1.3.566.gaa39828