On 5/19/15 4:14 AM, Reindl Harald wrote:
> i switched from "noatime,nodiratime" to
> "relatime,nodiratime,lazytime" which seems to lead in unexpected
> mtime changes for a lot of files leading in rkhunter alerts and
> likely rsync problems
The cargo-cult tuning, it burns! ;)
noatime implies nodiratime, no need to specify both:
touch_atime()
{
...
if (mnt->mnt_flags & MNT_NOATIME)
return;
if ((mnt->mnt_flags & MNT_NODIRATIME) && S_ISDIR(inode->i_mode))
return;
and relatime is default, so no need to re-specify:
/* Default to relatime unless overriden */
if (!(flags & MS_NOATIME))
mnt_flags |= MNT_RELATIME;
Anyway ... you didn't say what kernel you were running under, or what
filesystem.
If it's ext4, there have been some flaws there; recently:
> commit 8f4d855839179f410fa910a26eb81d646d628f26
> Author: Theodore Ts'o <tytso@xxxxxxx>
> Date: Thu May 14 18:19:01 2015 -0400
>
> ext4: fix lazytime optimization
>
> We had a fencepost error in the lazytime optimization which means that
> timestamp would get written to the wrong inode.
>
> Cc: stable@xxxxxxxxxxxxxxx
> Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
which looks like it's probably the culprit. This was broken since:
> commit a26f49926da938f47561f386be56a83dd37a496d
> Author: Theodore Ts'o <tytso@xxxxxxx>
> Date: Mon Feb 2 00:37:02 2015 -0500
>
> ext4: add optimization for the lazytime mount option
in v4.0-rc1
-Eric
> May 15 13:35:51 Installed: kernel-core-4.0.3-201.fc21.x86_64
> May 15 13:35:54 Installed: kernel-modules-4.0.3-201.fc21.x86_64
> May 15 13:35:55 Updated: kernel-headers-4.0.3-201.fc21.x86_64
>
> Warning: Package manager verification has failed:
> File: /usr/bin/vmstat
> The file modification time has changed
> Warning: Package manager verification has failed:
> File: /usr/sbin/fsck
> The file modification time has changed
> Warning: Package manager verification has failed:
> File: /usr/sbin/nologin
> The file modification time has changed
>
> [root@rh:~]$ stat /usr/sbin/fsck
> File: '/usr/sbin/fsck'
> Size: 37168 Blocks: 80 IO Block: 4096 regular file
> Device: 901h/2305d Inode: 1309455 Links: 1
> Access: (0755/-rwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
> Access: 2015-05-18 11:30:07.909951123 +0200
> Modify: 2015-05-15 13:34:47.037194874 +0200
> Change: 2015-05-15 13:34:47.037194874 +0200
>
>
>
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