[PATCH -V26 00/16] Generic name to handle and open by handle syscalls

[Aneesh Kumar K.V]

Hi,

The below set of patches implement open by handle support using exportfs
operations. This allows user space application to map a file name to file
handle and later open the file using handle. This should be usable
for userspace NFS [1] and 9P server [2]. XFS already support this with the ioctls
XFS_IOC_PATH_TO_HANDLE and XFS_IOC_OPEN_BY_HANDLE.

[1] http://nfs-ganesha.sourceforge.net/
[2] http://thread.gmane.org/gmane.comp.emulators.qemu/68992

git repo for the patchset at:
git://git.kernel.org/pub/scm/linux/kernel/git/kvaneesh/linux-open-handle.git open-by-handle

Test case can be found at
http://git.kernel.org/?p=fs/ext2/kvaneesh/handle-test.git
git://git.kernel.org/pub/scm/fs/ext2/kvaneesh/handle-test.git

Changes from V22:
a) Add support for O_PATH open flag
b) Add support "" names in *at syscalls
c) Add support O_PATH descriptor in few selective syscalls like stat, chown,
   chmod and dup

NOTE: v23-25 can be found in the git repo

-aneesh

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