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authorTao Ma <tao.ma@oracle.com>2009-08-23 23:13:37 -0400
committerJoel Becker <joel.becker@oracle.com>2009-09-22 23:09:29 -0400
commit374a263e790c4de85844283c098810a92985f623 (patch)
treea72b1f072b973723ea1cf7def27608717cf1c033 /firmware/vicam
parentc732eb16bf07f9bfb7fa72b6868462471273bdbd (diff)
ocfs2: Add refcount tree lock mechanism.
Implement locking around struct ocfs2_refcount_tree. This protects all read/write operations on refcount trees. ocfs2_refcount_tree has its own lock and its own caching_info, protecting buffers among multiple nodes. User must call ocfs2_lock_refcount_tree before his operation on the tree and unlock it after that. ocfs2_refcount_trees are referenced by the block number of the refcount tree root block, So we create an rb-tree on the ocfs2_super to look them up. Signed-off-by: Tao Ma <tao.ma@oracle.com>
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