1 From eb2cc3a5d4cfb8feee399507a8f2e2fe17f96cf4 Mon Sep 17 00:00:00 2001
2 From: Shaun Tancheff <stancheff@cray.com>
3 Date: Tue, 6 Aug 2019 18:12:53 -0500
4 Subject: [PATCH] + linux-5.3/ext4-hash-indexed-dir-dotdot-update.patch
7 fs/ext4/namei.c | 71 +++++++++++++++++++++++++++++++++++++++++++++++++
8 1 file changed, 71 insertions(+)
10 diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
11 index f54e868..14ff68e 100644
14 @@ -2174,6 +2174,74 @@ out_frames:
18 +/* update ".." for hash-indexed directory, split the item "." if necessary */
19 +static int ext4_update_dotdot(handle_t *handle, struct dentry *dentry,
20 + struct inode *inode)
22 + struct inode *dir = dentry->d_parent->d_inode;
23 + struct buffer_head *dir_block;
24 + struct ext4_dir_entry_2 *de;
25 + int len, journal = 0, err = 0;
28 + return PTR_ERR(handle);
30 + if (IS_DIRSYNC(dir))
33 + dir_block = ext4_bread(handle, dir, 0, 0);
34 + if (IS_ERR(dir_block)) {
35 + err = PTR_ERR(dir_block);
39 + de = (struct ext4_dir_entry_2 *)dir_block->b_data;
40 + /* the first item must be "." */
41 + assert(de->name_len == 1 && de->name[0] == '.');
42 + len = le16_to_cpu(de->rec_len);
43 + assert(len >= EXT4_DIR_REC_LEN(1));
44 + if (len > EXT4_DIR_REC_LEN(1)) {
45 + BUFFER_TRACE(dir_block, "get_write_access");
46 + err = ext4_journal_get_write_access(handle, dir_block);
51 + de->rec_len = cpu_to_le16(EXT4_DIR_REC_LEN(1));
54 + len -= EXT4_DIR_REC_LEN(1);
55 + assert(len == 0 || len >= EXT4_DIR_REC_LEN(2));
56 + de = (struct ext4_dir_entry_2 *)
57 + ((char *) de + le16_to_cpu(de->rec_len));
59 + BUFFER_TRACE(dir_block, "get_write_access");
60 + err = ext4_journal_get_write_access(handle, dir_block);
65 + de->inode = cpu_to_le32(inode->i_ino);
67 + de->rec_len = cpu_to_le16(len);
69 + assert(le16_to_cpu(de->rec_len) >= EXT4_DIR_REC_LEN(2));
71 + strcpy(de->name, "..");
72 + ext4_set_de_type(dir->i_sb, de, S_IFDIR);
76 + BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
77 + err = ext4_handle_dirty_dirblock(handle, dir, dir_block);
78 + ext4_mark_inode_dirty(handle, dir);
89 @@ -2229,6 +2297,9 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
93 + if (dentry->d_name.len == 2 &&
94 + memcmp(dentry->d_name.name, "..", 2) == 0)
95 + return ext4_update_dotdot(handle, dentry, inode);
96 retval = ext4_dx_add_entry(handle, &fname, dir, inode);
97 if (!retval || (retval != ERR_BAD_DX_DIR))