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authorMark Fasheh <mfasheh@suse.com>2009-02-18 02:29:35 +0300
committerMark Fasheh <mfasheh@suse.com>2009-04-03 22:39:16 +0400
commite3a93c2db6410822aa24295c3874b44ba21730a8 (patch)
tree8de41a37abc6497745d07506a0fb5174da61d7c1 /fs/ocfs2/ocfs2_fs.h
parent198a1ca3b735986542c538e38b9499ffcaed7005 (diff)
downloadlinux-e3a93c2db6410822aa24295c3874b44ba21730a8.tar.xz
ocfs2: Add total entry count to dx_root_block
This little bit of extra accounting speeds up ocfs2_empty_dir() dramatically by allowing us to short-circuit the full directory scan. Signed-off-by: Mark Fasheh <mfasheh@suse.com>
Diffstat (limited to 'fs/ocfs2/ocfs2_fs.h')
-rw-r--r--fs/ocfs2/ocfs2_fs.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index 43da76eff9ae..f7a5201410c8 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -421,6 +421,7 @@ static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = {
#define OCFS2_LINK_MAX 32000
#define OCFS2_DX_LINK_MAX ((1U << 31) - 1U)
#define OCFS2_LINKS_HI_SHIFT 16
+#define OCFS2_DX_ENTRIES_MAX (0xffffffffU)
#define S_SHIFT 12
static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = {
@@ -844,7 +845,10 @@ struct ocfs2_dx_root_block {
__u8 dr_reserved0;
__le16 dr_reserved1;
__le64 dr_dir_blkno; /* Pointer to parent inode */
- __le64 dr_reserved2;
+ __le32 dr_num_entries; /* Total number of
+ * names stored in
+ * this directory.*/
+ __le32 dr_reserved2;
__le64 dr_free_blk; /* Pointer to head of free
* unindexed block list. */
__le64 dr_reserved3[15];