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authorMark Fasheh <mfasheh@suse.com>2009-01-29 18:17:46 -0800
committerMark Fasheh <mfasheh@suse.com>2009-04-03 11:39:16 -0700
commite7c17e43090afe558c40bfb66637744c27bd2aeb (patch)
tree4c164c4ec59eaa7599c91f865a261517454ba45f /fs/ocfs2/dir.h
parent4ed8a6bb083bfcc21f1ed66a474b03c0386e4b34 (diff)
downloadop-kernel-dev-e7c17e43090afe558c40bfb66637744c27bd2aeb.zip
op-kernel-dev-e7c17e43090afe558c40bfb66637744c27bd2aeb.tar.gz
ocfs2: Introduce dir free space list
The only operation which doesn't get faster with directory indexing is insert, which still has to walk the entire unindexed directory portion to find a free block. This patch provides an improvement in directory insert performance by maintaining a singly linked list of directory leaf blocks which have space for additional dirents. Signed-off-by: Mark Fasheh <mfasheh@suse.com> Acked-by: Joel Becker <joel.becker@oracle.com>
Diffstat (limited to 'fs/ocfs2/dir.h')
-rw-r--r--fs/ocfs2/dir.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/fs/ocfs2/dir.h b/fs/ocfs2/dir.h
index 07b0416..e683f3d 100644
--- a/fs/ocfs2/dir.h
+++ b/fs/ocfs2/dir.h
@@ -39,11 +39,19 @@ struct ocfs2_dir_lookup_result {
struct buffer_head *dl_dx_root_bh; /* Root of indexed
* tree */
+
struct buffer_head *dl_dx_leaf_bh; /* Indexed leaf block */
struct ocfs2_dx_entry *dl_dx_entry; /* Target dx_entry in
* indexed leaf */
struct ocfs2_dx_hinfo dl_hinfo; /* Name hash results */
+
+ struct buffer_head *dl_prev_leaf_bh;/* Previous entry in
+ * dir free space
+ * list. NULL if
+ * previous entry is
+ * dx root block. */
};
+
void ocfs2_free_dir_lookup_result(struct ocfs2_dir_lookup_result *res);
int ocfs2_find_entry(const char *name, int namelen,
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