[Ocfs2-devel] [PATCH 10/15] Add xattr tree operations in ocfs2_extent_tree.v2
Tao Ma
tao.ma at oracle.com
Fri Jun 27 00:02:04 PDT 2008
ocfs2_xattr_block will use ocfs2_extent_list to store large numbers of
EAs. So add a new type in ocfs2_extent_tree_type and add one new
ocfs_extent_tree implementation so that it can use b-tree code to handle
the storage of many EAs.
Signed-off-by: Tao Ma <tao.ma at oracle.com>
---
fs/ocfs2/alloc.c | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
fs/ocfs2/alloc.h | 1 +
2 files changed, 54 insertions(+), 0 deletions(-)
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 2df5a7f..d93b7da 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -177,6 +177,48 @@ static struct ocfs2_extent_tree_operations ocfs2_xattr_et_ops = {
.sanity_check = ocfs2_xattr_value_sanity_check,
};
+static void ocfs2_xattr_tree_set_last_eb_blk(struct ocfs2_extent_tree *et,
+ u64 blkno)
+{
+ struct ocfs2_xattr_block *xb =
+ (struct ocfs2_xattr_block *) et->root_bh->b_data;
+ struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
+
+ xt->xt_last_eb_blk = cpu_to_le64(blkno);
+}
+
+static u64 ocfs2_xattr_tree_get_last_eb_blk(struct ocfs2_extent_tree *et)
+{
+ struct ocfs2_xattr_block *xb =
+ (struct ocfs2_xattr_block *) et->root_bh->b_data;
+ struct ocfs2_xattr_tree_root *xt = &xb->xb_attrs.xb_root;
+
+ return le64_to_cpu(xt->xt_last_eb_blk);
+}
+
+static void ocfs2_xattr_tree_update_clusters(struct inode *inode,
+ struct ocfs2_extent_tree *et,
+ u32 clusters)
+{
+ struct ocfs2_xattr_block *xb =
+ (struct ocfs2_xattr_block *)et->root_bh->b_data;
+
+ le32_add_cpu(&xb->xb_attrs.xb_root.xt_clusters, clusters);
+}
+
+static int ocfs2_xattr_tree_sanity_check(struct inode *inode,
+ struct ocfs2_extent_tree *et)
+{
+ return 0;
+}
+
+static struct ocfs2_extent_tree_operations ocfs2_xattr_tree_et_ops = {
+ .set_last_eb_blk = ocfs2_xattr_tree_set_last_eb_blk,
+ .get_last_eb_blk = ocfs2_xattr_tree_get_last_eb_blk,
+ .update_clusters = ocfs2_xattr_tree_update_clusters,
+ .sanity_check = ocfs2_xattr_tree_sanity_check,
+};
+
static struct ocfs2_extent_tree*
ocfs2_new_extent_tree(struct buffer_head *bh,
enum ocfs2_extent_tree_type et_type,
@@ -201,6 +243,11 @@ static struct ocfs2_extent_tree*
(struct ocfs2_xattr_value_root *) private;
et->root_el = &xv->xr_list;
et->eops = &ocfs2_xattr_et_ops;
+ } else if (et_type == OCFS2_XATTR_TREE_EXTENT) {
+ struct ocfs2_xattr_block *xb =
+ (struct ocfs2_xattr_block *)bh->b_data;
+ et->root_el = &xb->xb_attrs.xb_root.xt_list;
+ et->eops = &ocfs2_xattr_tree_et_ops;
}
return et;
@@ -570,6 +617,12 @@ int ocfs2_num_free_extents(struct ocfs2_super *osb,
last_eb_blk = le64_to_cpu(xv->xr_last_eb_blk);
el = &xv->xr_list;
+ } else if (type == OCFS2_XATTR_TREE_EXTENT) {
+ struct ocfs2_xattr_block *xb =
+ (struct ocfs2_xattr_block *)root_bh->b_data;
+
+ last_eb_blk = le64_to_cpu(xb->xb_attrs.xb_root.xt_last_eb_blk);
+ el = &xb->xb_attrs.xb_root.xt_list;
}
if (last_eb_blk) {
diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index b50ace5..7587f0e 100644
--- a/fs/ocfs2/alloc.h
+++ b/fs/ocfs2/alloc.h
@@ -29,6 +29,7 @@
enum ocfs2_extent_tree_type {
OCFS2_DINODE_EXTENT = 0,
OCFS2_XATTR_VALUE_EXTENT,
+ OCFS2_XATTR_TREE_EXTENT,
};
struct ocfs2_alloc_context;
--
1.5.4.GIT
More information about the Ocfs2-devel
mailing list