/[linux-patches]/hardened/2.6/trunk/2.6.28/1910_ext4-automatically-allocate-delay-allocated-blocks-on-rename.patch
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Contents of /hardened/2.6/trunk/2.6.28/1910_ext4-automatically-allocate-delay-allocated-blocks-on-rename.patch

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Revision 1519 - (show annotations) (download)
Wed Mar 18 19:25:21 2009 UTC (5 years, 7 months ago) by gengor
File size: 1706 byte(s)
Update 2.6.28 hardened-extras trunk/
1 Added-By: Gordon Malm <gengor@gentoo.org>
2
3 ---
4 From: Theodore Ts'o <tytso@mit.edu>
5 Date: Tue, 24 Feb 2009 04:05:27 +0000 (-0500)
6 Subject: ext4: Automatically allocate delay allocated blocks on rename
7 X-Git-Url: http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Ftytso%2Fext4.git;a=commitdiff_plain;h=dbc85aa9f11d8c13c15527d43a3def8d7beffdc8
8
9 ext4: Automatically allocate delay allocated blocks on rename
10
11 When renaming a file such that a link to another inode is overwritten,
12 force any delay allocated blocks that to be allocated so that if the
13 filesystem is mounted with data=ordered, the data blocks will be
14 pushed out to disk along with the journal commit. Many application
15 programs expect this, so we do this to avoid zero length files if the
16 system crashes unexpectedly.
17
18 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
19 ---
20
21 diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
22 index cb15900..a9a7581 100644
23 --- a/fs/ext4/namei.c
24 +++ b/fs/ext4/namei.c
25 @@ -2357,7 +2357,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
26 struct inode *old_inode, *new_inode;
27 struct buffer_head *old_bh, *new_bh, *dir_bh;
28 struct ext4_dir_entry_2 *old_de, *new_de;
29 - int retval;
30 + int retval, force_da_alloc = 0;
31
32 old_bh = new_bh = dir_bh = NULL;
33
34 @@ -2497,6 +2497,7 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
35 ext4_mark_inode_dirty(handle, new_inode);
36 if (!new_inode->i_nlink)
37 ext4_orphan_add(handle, new_inode);
38 + force_da_alloc = 1;
39 }
40 retval = 0;
41
42 @@ -2505,6 +2506,8 @@ end_rename:
43 brelse(old_bh);
44 brelse(new_bh);
45 ext4_journal_stop(handle);
46 + if (retval == 0 && force_da_alloc)
47 + ext4_alloc_da_blocks(old_inode);
48 return retval;
49 }
50

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