1 Index: linux-3.10.0-123.9.3.el7.x86_64/fs/ext4/namei.c
2 ===================================================================
3 --- linux-3.10.0-123.9.3.el7.x86_64.orig/fs/ext4/namei.c
4 +++ linux-3.10.0-123.9.3.el7.x86_64/fs/ext4/namei.c
5 @@ -1894,6 +1894,74 @@ static int make_indexed_dir(handle_t *ha
9 +/* update ".." for hash-indexed directory, split the item "." if necessary */
10 +static int ext4_update_dotdot(handle_t *handle, struct dentry *dentry,
11 + struct inode *inode)
13 + struct inode *dir = dentry->d_parent->d_inode;
14 + struct buffer_head *dir_block;
15 + struct ext4_dir_entry_2 *de;
16 + int len, journal = 0, err = 0;
19 + return PTR_ERR(handle);
21 + if (IS_DIRSYNC(dir))
24 + dir_block = ext4_bread(handle, dir, 0, 0);
25 + if (IS_ERR(dir_block)) {
26 + err = PTR_ERR(dir_block);
30 + de = (struct ext4_dir_entry_2 *)dir_block->b_data;
31 + /* the first item must be "." */
32 + assert(de->name_len == 1 && de->name[0] == '.');
33 + len = le16_to_cpu(de->rec_len);
34 + assert(len >= EXT4_DIR_REC_LEN(1));
35 + if (len > EXT4_DIR_REC_LEN(1)) {
36 + BUFFER_TRACE(dir_block, "get_write_access");
37 + err = ext4_journal_get_write_access(handle, dir_block);
42 + de->rec_len = cpu_to_le16(EXT4_DIR_REC_LEN(1));
45 + len -= EXT4_DIR_REC_LEN(1);
46 + assert(len == 0 || len >= EXT4_DIR_REC_LEN(2));
47 + de = (struct ext4_dir_entry_2 *)
48 + ((char *) de + le16_to_cpu(de->rec_len));
50 + BUFFER_TRACE(dir_block, "get_write_access");
51 + err = ext4_journal_get_write_access(handle, dir_block);
56 + de->inode = cpu_to_le32(inode->i_ino);
58 + de->rec_len = cpu_to_le16(len);
60 + assert(le16_to_cpu(de->rec_len) >= EXT4_DIR_REC_LEN(2));
62 + strcpy(de->name, "..");
63 + ext4_set_de_type(dir->i_sb, de, S_IFDIR);
67 + BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
68 + err = ext4_handle_dirty_dirent_node(handle, dir, dir_block);
69 + ext4_mark_inode_dirty(handle, dir);
80 @@ -1938,6 +2004,9 @@ int ext4_add_entry(handle_t *handle, str
84 + if (dentry->d_name.len == 2 &&
85 + memcmp(dentry->d_name.name, "..", 2) == 0)
86 + return ext4_update_dotdot(handle, dentry, inode);
87 retval = ext4_dx_add_entry(handle, &fname, dentry, inode);
88 if (!retval || (retval != ERR_BAD_DX_DIR))