[sheepdog] [sheepdog/sheepdog] ae04ea: sheep: avoid diskfull caused by recovery process

[Hitoshi Mitake]

  Branch: refs/heads/recovery-diskfull
  Home:   https://github.com/sheepdog/sheepdog
  Commit: ae04ea86feaa262ab256f0820e59c2c838f6ac15
      https://github.com/sheepdog/sheepdog/commit/ae04ea86feaa262ab256f0820e59c2c838f6ac15
  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.

Fixes https://github.com/sheepdog/sheepdog/issues/59

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