[PATCH 0/4] UBIFS: add xattr support for security / SELinux

[Ben Shelton]

I'm reposting the patch series for security xattr / SELinux support on UBIFS
from Subodh Nijsure and Marc Kleine-Budde [1] in order to restart the process
of getting this support upstream.

Notes:

 - I removed 'UBIFS: xattr: protect ui_size and data_len by ui_mutex' because
   after looking through the comments before the definition of struct
   ubifs_inode, I'm not sure what this was intended to fix.  It looks like
   i_size and data_len are not intended to be protected by ui_mutex, and I'm
   unclear on why ui->ui_size needs to be protected here by host_ui's ui_mutex.
   CCing Marc -- could you comment on how this is supposed to work?

 - I made the suggested locking fixes in [2], with the exception of removing the
   i_mutex lock/unlock around the call to security_inode_init_security(), which 
   caused an assert.  With these fixes, I turned on lockdep and ran with SELinux
   enabled on an ARM-based embedded target using UBIFS, and I saw no lockdep
   warnings during filesystem labeling and normal operation.

[1] http://lists.infradead.org/pipermail/linux-mtd/2013-February/045794.html
[2] http://lists.infradead.org/pipermail/linux-mtd/2013-February/045871.html

Subodh Nijsure (4):
  UBIFS: fix a couple bugs in UBIFS xattr length calculation
  UBIFS: Add xattr support for symlinks
  UBIFS: Add security.* XATTR support for the UBIFS
  UBIFS: add ubifs_err() to print error reason

 fs/ubifs/dir.c     |  20 +++++++++
 fs/ubifs/file.c    |   4 ++
 fs/ubifs/journal.c |  11 ++++-
 fs/ubifs/super.c   |   1 +
 fs/ubifs/ubifs.h   |   4 ++
 fs/ubifs/xattr.c   | 116 ++++++++++++++++++++++++++++++++++++++++++++++++-----
 6 files changed, 145 insertions(+), 11 deletions(-)

-- 
2.1.1