exofs for kernel 2.6.30

What's new since last iteration:

* I completely re-wrote the [PATCH 4/8] exofs: address_space_operations in which we actually write/read to/from osd-storage. The difference is that now we try to accumulate as many contiguous pages as possible and send them as one large request. As opposed to writing each page at a time, in the previous patchset.

* [PATCH 5/8] exofs: dir_inode and directory operations received lots of love thanks to Evgeniy Polyakov's grate comments.

exofs is a file system that uses an OSD device as it's back store.

OSD is a new T10 command set that views storage devices not as a large/flat array of sectors but as a container of objects, each having a length, quota, time attributes and more. Each object is addressed by a 64bit ID, and is contained in a 64bit ID partition. Each object has associated attributes attached to it, which are integral part of the object and provide metadata about the object. The standard defines some common obligatory attributes, but user attributes can be added as needed.

Here is the list of patches
[PATCH 1/8] exofs: Kbuild, Headers and osd utils
[PATCH 2/8] exofs: file and file_inode operations [PATCH 3/8] exofs: symlink_inode and fast_symlink_inode operations [PATCH 4/8] exofs: address_space_operations
[PATCH 5/8] exofs: dir_inode and directory operations [PATCH 6/8] exofs: super_operations and file_system_type [PATCH 7/8] exofs: Documentation
[PATCH 8/8] fs: Add exofs to Kernel build

This patchset is also available on:
git-clone git://git.open-osd.org/linux-open-osd.git linux-next
or on the web at:
http://git.open-osd.org/gitweb.cgi?p=linux-open-osd.git;a=shortlog;h=refs/heads/linux-next

(Above tree is based on Linus v2.6.29-rc8-212-g8144737)

If anyone wants to actually run this code and test it then please start reading at:

    http://open-osd.org

You will need to checkout the out-of-tree git (below) for the user-mode utilities. Also the exofs.txt file in patch 7/8 should help

If you want to review the user-mode library and supporting plumbings,
git-clone git://git.open-osd.org/open-osd.git
or on the web at:
http://git.open-osd.org/gitweb.cgi?p=open-osd.git;a=summary

Boaz