From e7d4cb6bc19658646357eeff134645cd9bc3479f Mon Sep 17 00:00:00 2001 From: Tao Ma Date: Mon, 18 Aug 2008 17:38:44 +0800 Subject: ocfs2: Abstract ocfs2_extent_tree in b-tree operations. In the old extent tree operation, we take the hypothesis that we are using the ocfs2_extent_list in ocfs2_dinode as the tree root. As xattr will also use ocfs2_extent_list to store large value for a xattr entry, we refactor the tree operation so that xattr can use it directly. The refactoring includes 4 steps: 1. Abstract set/get of last_eb_blk and update_clusters since they may be stored in different location for dinode and xattr. 2. Add a new structure named ocfs2_extent_tree to indicate the extent tree the operation will work on. 3. Remove all the use of fe_bh and di, use root_bh and root_el in extent tree instead. So now all the fe_bh is replaced with et->root_bh, el with root_el accordingly. 4. Make ocfs2_lock_allocators generic. Now it is limited to be only used in file extend allocation. But the whole function is useful when we want to store large EAs. Note: This patch doesn't touch ocfs2_commit_truncate() since it is not used for anything other than truncate inode data btrees. Signed-off-by: Tao Ma Signed-off-by: Mark Fasheh --- fs/ocfs2/alloc.h | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) (limited to 'fs/ocfs2/alloc.h') diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h index a0e334f10cd..473c8bcc62f 100644 --- a/fs/ocfs2/alloc.h +++ b/fs/ocfs2/alloc.h @@ -26,28 +26,37 @@ #ifndef OCFS2_ALLOC_H #define OCFS2_ALLOC_H +enum ocfs2_extent_tree_type { + OCFS2_DINODE_EXTENT = 0, +}; + struct ocfs2_alloc_context; int ocfs2_insert_extent(struct ocfs2_super *osb, handle_t *handle, struct inode *inode, - struct buffer_head *fe_bh, + struct buffer_head *root_bh, u32 cpos, u64 start_blk, u32 new_clusters, u8 flags, - struct ocfs2_alloc_context *meta_ac); + struct ocfs2_alloc_context *meta_ac, + enum ocfs2_extent_tree_type et_type); struct ocfs2_cached_dealloc_ctxt; -int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *di_bh, +int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *root_bh, handle_t *handle, u32 cpos, u32 len, u32 phys, struct ocfs2_alloc_context *meta_ac, - struct ocfs2_cached_dealloc_ctxt *dealloc); -int ocfs2_remove_extent(struct inode *inode, struct buffer_head *di_bh, + struct ocfs2_cached_dealloc_ctxt *dealloc, + enum ocfs2_extent_tree_type et_type); +int ocfs2_remove_extent(struct inode *inode, struct buffer_head *root_bh, u32 cpos, u32 len, handle_t *handle, struct ocfs2_alloc_context *meta_ac, - struct ocfs2_cached_dealloc_ctxt *dealloc); + struct ocfs2_cached_dealloc_ctxt *dealloc, + enum ocfs2_extent_tree_type et_type); int ocfs2_num_free_extents(struct ocfs2_super *osb, struct inode *inode, - struct buffer_head *bh); + struct buffer_head *root_bh, + enum ocfs2_extent_tree_type et_type); + /* * how many new metadata chunks would an allocation need at maximum? * -- cgit v1.2.3