3 Commits

Author	SHA1	Message	Date
Tao Ma	1823cb0b9f	ocfs2: Add support of decrementing refcount for delete. ... Given a physical cpos and length, decrement the refcount in the tree. If the refcount for any portion of the extent goes to zero, that portion is queued for freeing. Signed-off-by: Tao Ma <tao.ma@oracle.com>	2009-09-22 20:09:33 -07:00
Tao Ma	374a263e79	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>	2009-09-22 20:09:29 -07:00
Tao Ma	8dec98edfe	ocfs2: Add new refcount tree lock resource in dlmglue. ... refcount tree lock resource is used to protect refcount tree read/write among multiple nodes. Signed-off-by: Tao Ma <tao.ma@oracle.com>	2009-09-22 20:09:28 -07:00