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Subject[PATCH 28/39] ocfs2: Determine an extent tree's max_leaf_clusters in an et_op.
Date
From: Joel Becker <joel.becker@oracle.com>

Provide an optional extent_tree_operation to specify the
max_leaf_clusters of an ocfs2_extent_tree. If not provided, the value
is 0 (unlimited).

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
---
fs/ocfs2/alloc.c | 18 +++++++++++++++---
1 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 0b900f6..7c0721d 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -76,6 +76,8 @@ struct ocfs2_extent_tree_operations {
/* These are internal to ocfs2_extent_tree and don't have
* accessor functions */
void (*eo_fill_root_el)(struct ocfs2_extent_tree *et);
+ void (*eo_fill_max_leaf_clusters)(struct inode *inode,
+ struct ocfs2_extent_tree *et);
};

struct ocfs2_extent_tree {
@@ -205,6 +207,14 @@ static void ocfs2_xattr_tree_fill_root_el(struct ocfs2_extent_tree *et)
et->et_root_el = &xb->xb_attrs.xb_root.xt_list;
}

+static void ocfs2_xattr_tree_fill_max_leaf_clusters(struct inode *inode,
+ struct ocfs2_extent_tree *et)
+{
+ et->et_max_leaf_clusters =
+ ocfs2_clusters_for_bytes(inode->i_sb,
+ OCFS2_MAX_XATTR_TREE_LEAF_SIZE);
+}
+
static void ocfs2_xattr_tree_set_last_eb_blk(struct ocfs2_extent_tree *et,
u64 blkno)
{
@@ -243,6 +253,7 @@ static struct ocfs2_extent_tree_operations ocfs2_xattr_tree_et_ops = {
.eo_update_clusters = ocfs2_xattr_tree_update_clusters,
.eo_sanity_check = ocfs2_xattr_tree_sanity_check,
.eo_fill_root_el = ocfs2_xattr_tree_fill_root_el,
+ .eo_fill_max_leaf_clusters = ocfs2_xattr_tree_fill_max_leaf_clusters,
};

static void ocfs2_get_extent_tree(struct ocfs2_extent_tree *et,
@@ -254,7 +265,6 @@ static void ocfs2_get_extent_tree(struct ocfs2_extent_tree *et,
et->et_type = et_type;
get_bh(bh);
et->et_root_bh = bh;
- et->et_max_leaf_clusters = 0;
if (!obj)
obj = (void *)bh->b_data;
et->et_object = obj;
@@ -265,11 +275,13 @@ static void ocfs2_get_extent_tree(struct ocfs2_extent_tree *et,
et->et_ops = &ocfs2_xattr_et_ops;
} else if (et_type == OCFS2_XATTR_TREE_EXTENT) {
et->et_ops = &ocfs2_xattr_tree_et_ops;
- et->et_max_leaf_clusters = ocfs2_clusters_for_bytes(inode->i_sb,
- OCFS2_MAX_XATTR_TREE_LEAF_SIZE);
}

et->et_ops->eo_fill_root_el(et);
+ if (!et->et_ops->eo_fill_max_leaf_clusters)
+ et->et_max_leaf_clusters = 0;
+ else
+ et->et_ops->eo_fill_max_leaf_clusters(inode, et);
}

static void ocfs2_put_extent_tree(struct ocfs2_extent_tree *et)
--
1.5.4.5


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