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| author | Tao Ma <tao.ma@oracle.com> | 2009-08-24 05:13:37 +0200 |
|---|---|---|
| committer | Joel Becker <joel.becker@oracle.com> | 2009-09-23 05:09:29 +0200 |
| commit | 374a263e790c4de85844283c098810a92985f623 (patch) | |
| tree | a72b1f072b973723ea1cf7def27608717cf1c033 /fs/ocfs2/ocfs2.h | |
| parent | ocfs2: Add caching info for refcount tree. (diff) | |
| download | linux-374a263e790c4de85844283c098810a92985f623.tar.xz linux-374a263e790c4de85844283c098810a92985f623.zip | |
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/ocfs2.h')
| -rw-r--r-- | fs/ocfs2/ocfs2.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h index 6688d19e4451..bb5357376ef5 100644 --- a/fs/ocfs2/ocfs2.h +++ b/fs/ocfs2/ocfs2.h @@ -408,6 +408,10 @@ struct ocfs2_super /* the group we used to allocate inodes. */ u64 osb_inode_alloc_group; + + /* rb tree root for refcount lock. */ + struct rb_root osb_rf_lock_tree; + struct ocfs2_refcount_tree *osb_ref_tree_lru; }; #define OCFS2_SB(sb) ((struct ocfs2_super *)(sb)->s_fs_info) |