[sheepdog] [sheepdog/sheepdog] e1096e: sheep: avoid diskfull caused by recovery process

[Hitoshi Mitake]

  Branch: refs/heads/recovery-diskfull
  Home:   https://github.com/sheepdog/sheepdog
  Commit: e1096eb743181a19f9bef702a02f978f2585f4e8
      https://github.com/sheepdog/sheepdog/commit/e1096eb743181a19f9bef702a02f978f2585f4e8
  Author: Hitoshi Mitake <mitake.hitoshi at lab.ntt.co.jp>
  Date:   2015-10-28 (Wed, 28 Oct 2015)

  Changed paths:
    M sheep/recovery.c
    M sheep/sheep.c
    M sheep/sheep_priv.h

  Log Message:
  -----------
  sheep: avoid diskfull caused by recovery process

sheep can corrupt its cluster by diskfull with recovery process. For
avoiding this problem, this patch adds a new option -F to sheep. If
this command is passed to the sheep process, every sheep process of
the cluster stops itself if there is a possibility of diskfull during
recovery.

Signed-off-by: Hitoshi Mitake <mitake.hitoshi at lab.ntt.co.jp>