From 811f933df1e55615fd0bb4818f31e3868a8e6e23 Mon Sep 17 00:00:00 2001 From: Tao Ma Date: Mon, 18 Aug 2008 17:38:43 +0800 Subject: ocfs2: Use ocfs2_extent_list instead of ocfs2_dinode. ocfs2_extend_meta_needed(), ocfs2_calc_extend_credits() and ocfs2_reserve_new_metadata() are all useful for extent tree operations. But they are all limited to an inode btree because they use a struct ocfs2_dinode parameter. Change their parameter to struct ocfs2_extent_list (the part of an ocfs2_dinode they actually use) so that the xattr btree code can use these functions. Signed-off-by: Tao Ma Signed-off-by: Mark Fasheh --- fs/ocfs2/alloc.h | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'fs/ocfs2/alloc.h') diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h index 5c0f764b59ec..a0e334f10cd1 100644 --- a/fs/ocfs2/alloc.h +++ b/fs/ocfs2/alloc.h @@ -48,8 +48,14 @@ int ocfs2_remove_extent(struct inode *inode, struct buffer_head *di_bh, int ocfs2_num_free_extents(struct ocfs2_super *osb, struct inode *inode, struct buffer_head *bh); -/* how many new metadata chunks would an allocation need at maximum? */ -static inline int ocfs2_extend_meta_needed(struct ocfs2_dinode *fe) +/* + * how many new metadata chunks would an allocation need at maximum? + * + * Please note that the caller must make sure that root_el is the root + * of extent tree. So for an inode, it should be &fe->id2.i_list. Otherwise + * the result may be wrong. + */ +static inline int ocfs2_extend_meta_needed(struct ocfs2_extent_list *root_el) { /* * Rather than do all the work of determining how much we need @@ -59,7 +65,7 @@ static inline int ocfs2_extend_meta_needed(struct ocfs2_dinode *fe) * new tree_depth==0 extent_block, and one block at the new * top-of-the tree. */ - return le16_to_cpu(fe->id2.i_list.l_tree_depth) + 2; + return le16_to_cpu(root_el->l_tree_depth) + 2; } void ocfs2_dinode_new_extent_list(struct inode *inode, struct ocfs2_dinode *di); -- cgit v1.2.3