[BUGFIX][PATCH v2 0/2] configfs: Fix cleanup after mkdir() failure

[Louis Rilling <louis.rilling@xxxxxxxxxxx>]

 [ applies on top of http://lkml.org/lkml/2008/6/23/145 aka symlink() fixes ]

Hi,

This patchset fixes two kinds of bugs happening when
configfs_attach_group()/configfs_attach_item() fail and userspace races with
mkdir() or symlink().

Please read the first patch header for a detailed scenario explaining the bugs.

Louis

Changelog:
  - Few code reworks as requested by Joel (details in patch headers)

Summary (2):
  configfs: Prevent userspace from creating new entries under attaching
    directories
  configfs: Lock new directory inodes before removing on cleanup after
    failure

 fs/configfs/configfs_internal.h |    2 +
 fs/configfs/dir.c               |  141 ++++++++++++++++++++++++++++++++-------
 fs/configfs/symlink.c           |   15 ++++
 3 files changed, 133 insertions(+), 25 deletions(-)

-- 
Dr Louis Rilling			Kerlabs
Skype: louis.rilling			Batiment Germanium
Phone: (+33|0) 6 80 89 08 23		80 avenue des Buttes de Coesmes
http://www.kerlabs.com/			35700 Rennes
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