ocfs2: Add xattr bucket iteration for large numbers of EAs

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Ocfs2 breaks up xattr index tree leaves into 4k regions, called buckets.
Attributes are stored within a given bucket, depending on hash value.

After a discussion with Mark, we decided that the per-bucket index
(xe_entry[]) would only exist in the 1st block of a bucket. Likewise,
name/value pairs will not straddle more than one block. This allows the
majority of operations to work directly on the buffer heads in a leaf block.

This patch adds code to iterate the buckets in an EA. A new abstration of
ocfs2_xattr_bucket is added. It records the bhs in this bucket and
ocfs2_xattr_header. This keeps the code neat, improving readibility.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

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This commit is contained in:

Tao Ma 2008-08-18 17:38:50 +08:00 • committed by Mark Fasheh

parent ba492615f0

commit 0c044f0b24

3 changed files with 293 additions and 6 deletions

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35

fs/ocfs2/ocfs2_fs.h

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255

fs/ocfs2/xattr.c

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9

fs/ocfs2/xattr.h

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