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authorTao Ma <tao.ma@oracle.com>2009-08-18 11:43:17 +0800
committerJoel Becker <joel.becker@oracle.com>2009-09-22 20:09:41 -0700
commit492a8a33e1cb966fa0b5756c5fc11d30c8f8848e (patch)
treeeacf691b07c8fa3e81c11ff1d6b8773c2dbb9e77 /fs/ocfs2/refcounttree.h
parent913580b4cd445c4fb25d7cf167911a8cf6bdb1eb (diff)
downloadop-kernel-dev-492a8a33e1cb966fa0b5756c5fc11d30c8f8848e.zip
op-kernel-dev-492a8a33e1cb966fa0b5756c5fc11d30c8f8848e.tar.gz
ocfs2: Add CoW support for xattr.
In order to make 2 transcation(xattr and cow) independent with each other, we CoW the whole xattr out in case we are setting them. Signed-off-by: Tao Ma <tao.ma@oracle.com>
Diffstat (limited to 'fs/ocfs2/refcounttree.h')
-rw-r--r--fs/ocfs2/refcounttree.h29
1 files changed, 29 insertions, 0 deletions
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
index 356f99c..d09d64b 100644
--- a/fs/ocfs2/refcounttree.h
+++ b/fs/ocfs2/refcounttree.h
@@ -54,4 +54,33 @@ int ocfs2_prepare_refcount_change_for_del(struct inode *inode,
struct ocfs2_alloc_context **meta_ac);
int ocfs2_refcount_cow(struct inode *inode, struct buffer_head *di_bh,
u32 cpos, u32 write_len, u32 max_cpos);
+
+typedef int (ocfs2_post_refcount_func)(struct inode *inode,
+ handle_t *handle,
+ void *para);
+/*
+ * Some refcount caller need to do more work after we modify the data b-tree
+ * during refcount operation(including CoW and add refcount flag), and make the
+ * transaction complete. So it must give us this structure so that we can do it
+ * within our transaction.
+ *
+ */
+struct ocfs2_post_refcount {
+ int credits; /* credits it need for journal. */
+ ocfs2_post_refcount_func *func; /* real function. */
+ void *para;
+};
+
+int ocfs2_refcounted_xattr_delete_need(struct inode *inode,
+ struct ocfs2_caching_info *ref_ci,
+ struct buffer_head *ref_root_bh,
+ struct ocfs2_xattr_value_root *xv,
+ int *meta_add, int *credits);
+int ocfs2_refcount_cow_xattr(struct inode *inode,
+ struct ocfs2_dinode *di,
+ struct ocfs2_xattr_value_buf *vb,
+ struct ocfs2_refcount_tree *ref_tree,
+ struct buffer_head *ref_root_bh,
+ u32 cpos, u32 write_len,
+ struct ocfs2_post_refcount *post);
#endif /* OCFS2_REFCOUNTTREE_H */
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