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| author | Tao Ma <tao.ma@oracle.com> | 2009-08-24 07:13:37 +0400 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2009-09-23 07:09:29 +0400 |
| commit | 374a263e790c4de85844283c098810a92985f623 (patch) | |
| tree | a72b1f072b973723ea1cf7def27608717cf1c033 /fs/ocfs2/refcounttree.h | |
| parent | c732eb16bf07f9bfb7fa72b6868462471273bdbd (diff) | |
| download | linux-374a263e790c4de85844283c098810a92985f623.tar.xz | |
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>
Diffstat (limited to 'fs/ocfs2/refcounttree.h')
| -rw-r--r-- | fs/ocfs2/refcounttree.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h index 9a3695cdbb53..2ea7fc52c23c 100644 --- a/fs/ocfs2/refcounttree.h +++ b/fs/ocfs2/refcounttree.h @@ -33,4 +33,11 @@ struct ocfs2_refcount_tree { struct super_block *rf_sb; }; +void ocfs2_purge_refcount_trees(struct ocfs2_super *osb); +int ocfs2_lock_refcount_tree(struct ocfs2_super *osb, u64 ref_blkno, int rw, + struct ocfs2_refcount_tree **tree, + struct buffer_head **ref_bh); +void ocfs2_unlock_refcount_tree(struct ocfs2_super *osb, + struct ocfs2_refcount_tree *tree, + int rw); #endif /* OCFS2_REFCOUNTTREE_H */ |