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 +1894,72 @@ 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, &err);
28 + de = (struct ext4_dir_entry_2 *)dir_block->b_data;
29 + /* the first item must be "." */
30 + assert(de->name_len == 1 && de->name[0] == '.');
31 + len = le16_to_cpu(de->rec_len);
32 + assert(len >= EXT4_DIR_REC_LEN(1));
33 + if (len > EXT4_DIR_REC_LEN(1)) {
34 + BUFFER_TRACE(dir_block, "get_write_access");
35 + err = ext4_journal_get_write_access(handle, dir_block);
40 + de->rec_len = cpu_to_le16(EXT4_DIR_REC_LEN(1));
43 + len -= EXT4_DIR_REC_LEN(1);
44 + assert(len == 0 || len >= EXT4_DIR_REC_LEN(2));
45 + de = (struct ext4_dir_entry_2 *)
46 + ((char *) de + le16_to_cpu(de->rec_len));
48 + BUFFER_TRACE(dir_block, "get_write_access");
49 + err = ext4_journal_get_write_access(handle, dir_block);
54 + de->inode = cpu_to_le32(inode->i_ino);
56 + de->rec_len = cpu_to_le16(len);
58 + assert(le16_to_cpu(de->rec_len) >= EXT4_DIR_REC_LEN(2));
60 + strcpy(de->name, "..");
61 + ext4_set_de_type(dir->i_sb, de, S_IFDIR);
65 + BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
66 + err = ext4_handle_dirty_dirent_node(handle, dir, dir_block);
67 + ext4_mark_inode_dirty(handle, dir);
78 @@ -1938,6 +2004,9 @@ int ext4_add_entry(handle_t *handle, str
82 + if (dentry->d_name.len == 2 &&
83 + memcmp(dentry->d_name.name, "..", 2) == 0)
84 + return ext4_update_dotdot(handle, dentry, inode);
85 retval = ext4_dx_add_entry(handle, dentry, inode);
86 if (!retval || (retval != ERR_BAD_DX_DIR))