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authorTao Ma <tao.ma@oracle.com>2008-08-18 17:38:44 +0800
committerMark Fasheh <mfasheh@suse.com>2008-10-13 13:57:58 -0700
commite7d4cb6bc19658646357eeff134645cd9bc3479f (patch)
tree4e24321e5c28fb90dffa1f396972fddb3c458e58 /fs/ocfs2/alloc.h
parent811f933df1e55615fd0bb4818f31e3868a8e6e23 (diff)
downloadlinux-e7d4cb6bc19658646357eeff134645cd9bc3479f.tar.bz2
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 <tao.ma@oracle.com> Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/alloc.h')
-rw-r--r--fs/ocfs2/alloc.h23
1 files changed, 16 insertions, 7 deletions
diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index a0e334f10cd1..473c8bcc62fb 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?
*