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ocfs2: btree changes for unwritten extents

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Writes to a region marked as unwritten might result in a record split or
merge. We can support splits by making minor changes to the existing insert
code. Merges require left rotations which mostly re-use right rotation
support functions.

Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Mark Fasheh
2007-06-18 10:48:04 -07:00
parent c3afcbb344
commit 328d5752e1
6 changed files with 1770 additions and 91 deletions
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6
fs/ocfs2/alloc.h
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@@ -35,6 +35,11 @@ int ocfs2_insert_extent(struct ocfs2_super *osb,
u64 start_blk,
u32 new_clusters,
struct ocfs2_alloc_context *meta_ac);
struct ocfs2_cached_dealloc_ctxt;
int ocfs2_mark_extent_written(struct inode *inode, struct buffer_head *di_bh,
handle_t *handle, u32 cpos, u32 len, u32 phys,
struct ocfs2_alloc_context *meta_ac,
struct ocfs2_cached_dealloc_ctxt *dealloc);
int ocfs2_num_free_extents(struct ocfs2_super *osb,
struct inode *inode,
struct ocfs2_dinode *fe);
@@ -102,6 +107,7 @@ int ocfs2_commit_truncate(struct ocfs2_super *osb,
int ocfs2_find_leaf(struct inode *inode, struct ocfs2_extent_list *root_el,
u32 cpos, struct buffer_head **leaf_bh);
int ocfs2_search_extent_list(struct ocfs2_extent_list *el, u32 v_cluster);
/*
* Helper function to look at the # of clusters in an extent record.