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Diffstat (limited to 'fs/hfsplus/bnode.c')
-rw-r--r--fs/hfsplus/bnode.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/fs/hfsplus/bnode.c b/fs/hfsplus/bnode.c
index 285502af8df1..759708fd9331 100644
--- a/fs/hfsplus/bnode.c
+++ b/fs/hfsplus/bnode.c
@@ -646,8 +646,8 @@ void hfs_bnode_put(struct hfs_bnode *node)
if (test_bit(HFS_BNODE_DELETED, &node->flags)) {
hfs_bnode_unhash(node);
spin_unlock(&tree->hash_lock);
- hfs_bnode_clear(node, 0,
- PAGE_CACHE_SIZE * tree->pages_per_bnode);
+ if (hfs_bnode_need_zeroout(tree))
+ hfs_bnode_clear(node, 0, tree->node_size);
hfs_bmap_free(node);
hfs_bnode_free(node);
return;
@@ -656,3 +656,16 @@ void hfs_bnode_put(struct hfs_bnode *node)
}
}
+/*
+ * Unused nodes have to be zeroed if this is the catalog tree and
+ * a corresponding flag in the volume header is set.
+ */
+bool hfs_bnode_need_zeroout(struct hfs_btree *tree)
+{
+ struct super_block *sb = tree->inode->i_sb;
+ struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
+ const u32 volume_attr = be32_to_cpu(sbi->s_vhdr->attributes);
+
+ return tree->cnid == HFSPLUS_CAT_CNID &&
+ volume_attr & HFSPLUS_VOL_UNUSED_NODE_FIX;
+}