[sheepdog] [PATCH v2 0/2] vdi rollback support

[MORITA Kazutaka]

Changes from v1 are:
 - delete the current state before rolling back to the snapshot
 - add test

With this version, I think "collie vdi rollback" will work as everyone
expects.

Here is an example:

  $ collie vdi create test 4G
  $ echo snap1 | collie vdi write test 0 512
  $ collie vdi snapshot test -s snap1
  $ echo snap2 | collie vdi write test 0 512
  $ collie vdi snapshot test -s snap2
  $ collie vdi read test 0 512
  snap2
  $ collie vdi rollback test -s snap1
  $ collie vdi read test 0 512
  snap1
  $ collie vdi rollback test -s snap2
  $ collie vdi read test 0 512
  snap2
  $ collie vdi list
    Name        Id    Size    Used  Shared    Creation time   VDI id  Copies  Tag
  s test         1  4.0 GB  4.0 MB  0.0 MB 2012-09-01 09:29   7c2b25     1         snap1
  s test         2  4.0 GB  4.0 MB  0.0 MB 2012-09-01 09:30   7c2b26     1         snap2
    test         3  4.0 GB  0.0 MB  4.0 MB 2012-09-01 09:30   7c2b29     1


MORITA Kazutaka (2):
  collie: add vdi rollback support
  tests: add test of vdi rollback

 collie/vdi.c  |   67 ++++++++++++++++++++++++++++++++++++++++++++++++--------
 man/collie.8  |    3 ++
 tests/039     |   63 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/039.out |   54 +++++++++++++++++++++++++++++++++++++++++++++
 tests/group   |    1 +
 5 files changed, 178 insertions(+), 10 deletions(-)
 create mode 100755 tests/039
 create mode 100644 tests/039.out

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1.7.2.5