[PATCH 0/4] ecryptfs NFS export support

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These patch add NFS support to ecryptfs. We have two approaches to
implemnt it. The first one is to implement encode_fh(), fh_to_dentry()
and get_parent() just like most of the other filesystems do. The second
one is the implementation of overlayfs. These patches implement the
second one. I also add subtree_check support in the third patch.

I ran the xfstests[1] on both exported ecryptfs and ext4 with
rw,relatime,vers=4.1 mount options. The output/failure of ecryptfs is
the same as ext4 except some limitations of ecryptfs:
  generic/014 and generic/129: I stopped them because it took too much
  time to test file truncate.
  generic/453: Filename length exceeds the limit of ecryptfs.

[1] http://linux-nfs.org/wiki/index.php/Xfstests

jaycelin (4):
  ecryptfs: add ecryptfs_superblock_to_lower_mnt
  ecryptfs: add export_operations to ecryptfs
  ecryptfs: add export subtree_check support
  ecryptfs: wire up nfs export operations

 fs/ecryptfs/Makefile          |   2 +-
 fs/ecryptfs/ecryptfs_kernel.h |   7 +
 fs/ecryptfs/export.c          | 487 ++++++++++++++++++++++++++++++++++
 fs/ecryptfs/main.c            |   1 +
 4 files changed, 496 insertions(+), 1 deletion(-)
 create mode 100644 fs/ecryptfs/export.c


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