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authorTao Ma <tao.ma@oracle.com>2008-08-18 05:38:50 -0400
committerMark Fasheh <mfasheh@suse.com>2008-10-13 19:57:03 -0400
commit0c044f0b24b9128ba8c297149d88bd81f2e36af3 (patch)
tree2a0d6a34fca5e5a8bdfde0d1068cb56d4252e864 /Documentation/watchdog/00-INDEX
parentba492615f0d32d0210b02c14b24512b4372b13d6 (diff)
ocfs2: Add xattr bucket iteration for large numbers of EAs
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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