Re: [PATCH 0/39] Ocfs2 updates for 2.6.28

[Tao Ma <tao.ma@oracle.com>]

Hi Mark,
	do you see my 2 patches for xattr?
http://oss.oracle.com/pipermail/ocfs2-devel/2008-September/002839.html
this is pretty straightforward and I think it can be committed with it.
http://oss.oracle.com/pipermail/ocfs2-devel/2008-September/002839.html
this is the new support for empty bucket.

Regards,
Tao


Mark Fasheh wrote:
> Hi,
> 
> 	The following patches comprise the bulk of Ocfs2 updates for the
> 2.6.28 merge window. They can roughly be broken up into 4 sets which add
> incremental features to Ocfs2. The patches are presented as they come in
> git.
> 
> 
> EA Support
> 
> The largest set adds support for extended attributes in Ocfs2. Extended
> attributes are stored both within the inode block, and externally, when their
> numbers grow. Individual attributes can be arbitrarily sized. Smaller ones
> have their data stored inline. Larger attributes grow out to a btree. In
> theory the btrees have similar limits to inode data. In practice though, the
> VFS limits EA sizes to 64K.
> 
> When inode space for attributes run low, new ones are created in an external
> disk block. When the block fills up, external attributes are moved to an
> indexed btree. The btree can store many thousands of attributes, if needed.
> 
> The patches leading up to EA support further abstracted portions of the Ocfs2
> btree code. Ultimately, this means we can "add" a btree to any Ocfs2 structure
> by embedding a header, and providing the proper callbacks to manipulate
> certain key fields. The xattr code makes use of this, as will future Ocfs2
> features.
> 
> Joel made some further improvements to our 'generic' (for Ocfs2 at least)
> btree support which completed the interface by cleaning things up and
> providing for proper callbacks in a static operations structure. Those patches
> follow the xattr series as they were developed afterwards.
> 
> 
> JBD2 Support
> 
> Ocfs2 can now use JBD2. Amongst other benefits, this allows us to support
> large block devices with more than 32 bits worth of block numbers. As a part
> of these patches, and 'inode64' mount option is added which toggles creation
> of inodes whose inode number requires more than 32 bits to be adequately
> described.
> 
> JBD2 support in Ocfs2 is compiled in by default, however since journaling is
> so central to the operation of a file system, we kept our 'legacy' JBD
> support. We did this to provide a fallback for any users who might hit a
> problem, while we fix it. Legacy JBD support will be removed from Ocfs2 in
> 2.6.29.
> 
> 
> Cluster Aware POSIX File Locks
> 
> This was added via the 'plock' interface which Dave Teigland pulled into
> fs/dlm last merge window. The majority of the support is actually provided in
> userspace via the dlm_controld. As a result, cluster-aware POSIX locks only
> work for userspace cluster stacks right now.
> 
> 
> Local Alloc Throttling
> 
> These patches allow the "local alloc" file in Ocfs2 to throttle back the
> number of free disk blocks it caches. This is done during times of extreme
> fragmentation, or very low disk space. The traditional behavior was to
> completely disable the local alloc feature, which resulted in performance
> problems on some corner cases. The throttling has increased performance by 10
> times during such situations.
> 
> 
> Please pull from 'merge_window' branch of
> git://git.kernel.org/pub/scm/linux/kernel/git/mfasheh/ocfs2.git merge_window
> 
> to receive the following updates:
> 
>  Documentation/filesystems/ocfs2.txt |    4 +
>  fs/Kconfig                          |   40 +-
>  fs/ocfs2/Makefile                   |    5 +-
>  fs/ocfs2/alloc.c                    |  857 +++++--
>  fs/ocfs2/alloc.h                    |   86 +-
>  fs/ocfs2/aops.c                     |   49 +-
>  fs/ocfs2/cluster/masklog.c          |    1 +
>  fs/ocfs2/cluster/masklog.h          |    1 +
>  fs/ocfs2/dir.c                      |   26 +-
>  fs/ocfs2/extent_map.c               |   60 +
>  fs/ocfs2/extent_map.h               |    3 +
>  fs/ocfs2/file.c                     |  313 +--
>  fs/ocfs2/file.h                     |   32 +-
>  fs/ocfs2/inode.c                    |   28 +-
>  fs/ocfs2/inode.h                    |    4 +
>  fs/ocfs2/journal.c                  |   72 +-
>  fs/ocfs2/journal.h                  |   52 +-
>  fs/ocfs2/localalloc.c               |  362 +++-
>  fs/ocfs2/localalloc.h               |    4 +
>  fs/ocfs2/locks.c                    |   15 +
>  fs/ocfs2/locks.h                    |    1 +
>  fs/ocfs2/namei.c                    |   13 +-
>  fs/ocfs2/ocfs2.h                    |   56 +-
>  fs/ocfs2/ocfs2_fs.h                 |  220 ++-
>  fs/ocfs2/ocfs2_jbd_compat.h         |   82 +
>  fs/ocfs2/stack_user.c               |   33 +
>  fs/ocfs2/stackglue.c                |   20 +
>  fs/ocfs2/stackglue.h                |   19 +
>  fs/ocfs2/suballoc.c                 |  205 ++-
>  fs/ocfs2/suballoc.h                 |   26 +-
>  fs/ocfs2/super.c                    |   59 +-
>  fs/ocfs2/symlink.c                  |    9 +
>  fs/ocfs2/uptodate.c                 |   38 +-
>  fs/ocfs2/uptodate.h                 |    3 +
>  fs/ocfs2/xattr.c                    | 4851 +++++++++++++++++++++++++++++++++++
>  fs/ocfs2/xattr.h                    |   68 +
>  fs/ocfs2/xattr_trusted.c            |   82 +
>  fs/ocfs2/xattr_user.c               |   94 +
>  38 files changed, 7271 insertions(+), 622 deletions(-)
>  create mode 100644 fs/ocfs2/ocfs2_jbd_compat.h
>  create mode 100644 fs/ocfs2/xattr.c
>  create mode 100644 fs/ocfs2/xattr.h
>  create mode 100644 fs/ocfs2/xattr_trusted.c
>  create mode 100644 fs/ocfs2/xattr_user.c
> 
> Joel Becker (15):
>       ocfs2: Prefix the extent tree operations structure.
>       ocfs2: Prefix the ocfs2_extent_tree structure.
>       ocfs2: Make ocfs2_extent_tree get/put instead of alloc.
>       ocfs2: Make 'private' into 'object' on ocfs2_extent_tree.
>       ocfs2: Provide the get_root_el() method to ocfs2_extent_tree_operations.
>       ocfs2: Use struct ocfs2_extent_tree in ocfs2_num_free_extents().
>       ocfs2: Determine an extent tree's max_leaf_clusters in an et_op.
>       ocfs2: Create specific get_extent_tree functions.
>       ocfs2: Add an insertion check to ocfs2_extent_tree_operations.
>       ocfs2: Make ocfs2_extent_tree the first-class representation of a tree.
>       ocfs2: Comment struct ocfs2_extent_tree_operations.
>       ocfs2: Change ocfs2_get_*_extent_tree() to ocfs2_init_*_extent_tree()
>       ocfs2: Limit inode allocation to 32bits.
>       ocfs2: Add the 'inode64' mount option.
>       ocfs2: Switch over to JBD2.
> 
> Mark Fasheh (5):
>       ocfs2: POSIX file locks support
>       ocfs2: Track local alloc bits internally
>       ocfs2: throttle back local alloc when low on disk space
>       ocfs2: track local alloc state via debugfs
>       ocfs2: fix printk format warnings
> 
> Sunil Mushran (1):
>       ocfs2: Add xattr mount option in ocfs2_show_options()
> 
> Tao Ma (15):
>       ocfs2: Modify ocfs2_num_free_extents for future xattr usage.
>       ocfs2: Use ocfs2_extent_list instead of ocfs2_dinode.
>       ocfs2: Abstract ocfs2_extent_tree in b-tree operations.
>       ocfs2: Make high level btree extend code generic
>       ocfs2: Add the basic xattr disk layout in ocfs2_fs.h
>       ocfs2: Add helper function in uptodate.c for removing xattr clusters
>       ocfs2: Add extent tree operation for xattr value btrees
>       ocfs2: Add xattr index tree operations
>       ocfs2: Add xattr bucket iteration for large numbers of EAs
>       ocfs2: Add xattr lookup code xattr btrees
>       ocfs2: Optionally limit extent size in ocfs2_insert_extent()
>       ocfs2: Enable xattr set in index btree
>       ocfs2: Delete all xattr buckets during inode removal
>       ocfs2: bug-fix for journal extend in xattr.
>       ocfs2: Resolve deadlock in ocfs2_xattr_free_block.
> 
> Tiger Yang (3):
>       ocfs2: reserve inline space for extended attribute
>       ocfs2: Add extended attribute support
>       ocfs2: Add incompatible flag for extended attribute
> 
> --
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