[sheepdog] [PATCH 0/3] sheep, dog: configurable vid space

[Takafumi Fujieda]

Current, deleted vids are not reused, without cutting relations.
If snapshots of many online vdis in a cluster are created continuously,
the vid space will be exhausted.

These patches make vid space size configurable from 24 bits to 26 bits
by using the reserved bits in the oid.
A new option "-s <bits>" is added to dog cluster format for specify the vid space size.
(The default vid space size is 24 bits)

These patches don't care compatibility of object files and cluster snapshot data
created under different vid spaces.
If you want to change your cluster's vid space keeping existing vdis,
the cluster must be shutdowned and all vdis should be outputted
by using qemu-img and "dog vdi backup".

Takafumi Fujieda (3):
  sheep, dog: add vid space variables to the structs
  sheep, dog: make vid space size variable
  dog: add a new option to specify the vid space

 dog/cluster.c             |   67 +++++++++++++++++++++++++++++++++++++++-----
 dog/common.c              |   32 +++++++++++++++++-----
 dog/dog.h                 |    3 +-
 dog/farm/farm.c           |   16 ++++++++++-
 dog/farm/farm.h           |    3 +-
 dog/node.c                |    3 +-
 dog/vdi.c                 |   22 ++++++++++-----
 include/internal_proto.h  |    6 +++-
 include/sheepdog_proto.h  |   18 +++++++-----
 sheep/config.c            |   20 ++++++++++++-
 sheep/gateway.c           |   23 +++++++++-------
 sheep/group.c             |   10 +++++-
 sheep/journal.c           |    3 +-
 sheep/nfs/fs.c            |    4 +-
 sheep/nfs/nfs.c           |    4 +-
 sheep/object_cache.c      |   13 +++++----
 sheep/object_list_cache.c |    2 +-
 sheep/ops.c               |   35 +++++++++++++++++++-----
 sheep/plain_store.c       |   25 ++++++++++-------
 sheep/recovery.c          |   10 ++++---
 sheep/request.c           |    3 +-
 sheep/sheep_priv.h        |    6 +++-
 sheep/vdi.c               |   43 +++++++++++++++++-----------
 sheepfs/volume.c          |    2 +-
 24 files changed, 269 insertions(+), 104 deletions(-)