1 files changed, 25 insertions, 0 deletions

diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index ef1bed66c14f..0bb3f9ea0832 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -571,6 +571,31 @@ static int ext4_release_dir(struct inode *inode, struct file *filp)
         return 0;
 }
 
+int ext4_check_all_de(struct inode *dir, struct buffer_head *bh, void *buf,
+                      int buf_size)
+{
+        struct ext4_dir_entry_2 *de;
+        int nlen, rlen;
+        unsigned int offset = 0;
+        char *top;
+
+        de = (struct ext4_dir_entry_2 *)buf;
+        top = buf + buf_size;
+        while ((char *) de < top) {
+                if (ext4_check_dir_entry(dir, NULL, de, bh,
+                                         buf, buf_size, offset))
+                        return -EIO;
+                nlen = EXT4_DIR_REC_LEN(de->name_len);
+                rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
+                de = (struct ext4_dir_entry_2 *)((char *)de + rlen);
+                offset += rlen;
+        }
+        if ((char *) de > top)
+                return -EIO;
+
+        return 0;
+}
+
 const struct file_operations ext4_dir_operations = {
         .llseek         = ext4_dir_llseek,
         .read           = generic_read_dir,