[sheepdog] [PATCH v3 0/4] add a new API for atomic creation and writing and let config use it

[Hitoshi Mitake]

Because config cannot employ the journaling mechanism, this patchset
adds a new API, atomic_create_and_write() and let the config subsystem
use it for safe update of its data.

v3:
 - fixed invalid error messages
 - remove unnecessary access(2) in check_tmp_config(), take 2

v2:
 - move def_fmode and def_dmode to libsheepdog.a
 - don't panic() even if temporal files reamin
 - remove unnecessary access(2) in check_tmp_config()


Hitoshi Mitake (4):
  journal: remove journaling support for config
  util: move def_fmode and def_dmode to libsheepdog.a
  util: add a new API atomic_create_and_write()
  sheep: let config use atomic_create_and_write()

 include/util.h       |    4 ++++
 lib/util.c           |   38 ++++++++++++++++++++++++++++++++++++++
 sheep/config.c       |   45 +++++++++++++++++++++------------------------
 sheep/journal.c      |   19 +------------------
 sheep/md.c           |    2 +-
 sheep/object_cache.c |   14 +++++++-------
 sheep/plain_store.c  |    6 +++---
 sheep/sheep_priv.h   |    2 --
 sheep/store.c        |    9 +++------
 9 files changed, 78 insertions(+), 61 deletions(-)

-- 
1.7.2.5