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ocfs2: Add support of decrementing refcount for delete.

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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>
This commit is contained in:
Tao Ma
2009-08-18 11:24:49 +08:00
committed by Joel Becker
parent e73a819db9
commit 1823cb0b9f
4 changed files with 265 additions and 5 deletions
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5
fs/ocfs2/refcounttree.h
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@@ -40,4 +40,9 @@ int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw,
void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb,
struct ocfs2_refcount_tree *tree,
int rw);
int ocfs2_decrease_refcount(struct inode *inode,
handle_t *handle, u32 cpos, u32 len,
struct ocfs2_alloc_context *meta_ac,
struct ocfs2_cached_dealloc_ctxt *dealloc);
#endif /* OCFS2_REFCOUNTTREE_H */