[Samba] Samba 4 provisioning error on Ubuntu 12.04

[Denis Cardon]

Hi Rowland,


> Well, after a bit of thought and downloading the kernel source from
> Ubuntu, I am answering my own question.

I came across the same issue last week. Actually the newest kernel 
(wheezy/ ubuntu 12.04), the /proc/mounts does not show options that are 
setup by default in tune2fs (see the "Default mount options" below)

[root at debian ~]# tune2fs  -l /dev/xvda1
tune2fs 1.42.2 (9-Apr-2012)
Filesystem volume name:   <none>
Last mounted on:          /
Filesystem UUID:          571f5042-f210-45a1-9385-e5caf2f86e8b
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index 
filetype needs_recovery extent flex_bg sparse_super large_file huge_file 
uninit_bg dir_nlink extra_isize
Filesystem flags:         signed_directory_hash
Default mount options:    user_xattr acl

If you want to have the acl flag displayed in /proc/mounts (and 
/etc/mtab which now finally symlinks to /proc/mounts), you have to 
remove the "Default mount options" with the command below and add the 
acl option in /etc/fstab :

tune2fs -o ^acl /dev/xvda1

Cheers,

Denis


>
> This is from the source file for the kernel that Ubuntu 12.04 uses
> (3.2.0-25)
>
> It comes from "Documentation/filesystems/ext4.txt"
>
> nouser_xattr Disables Extended User Attributes. If you have extended
> attribute support enabled in the kernel configuration
> (CONFIG_EXT4_FS_XATTR), extended attribute support
> is enabled by default on mount. See the attr(5) manual
> page and http://acl.bestbits.at/ for more information
> about extended attributes.
>
> noacl This option disables POSIX Access Control List
> support. If ACL support is enabled in the kernel
> configuration (CONFIG_EXT4_FS_POSIX_ACL), ACL is
> enabled by default on mount. See the acl(5) manual
> page and http://acl.bestbits.at/ for more information
> about acl.
>
> If I run:
> cat /boot/config-3.2.0-25-generic | grep CONFIG_EXT4
> I get:
> CONFIG_EXT4_FS=y
> CONFIG_EXT4_FS_XATTR=y
> CONFIG_EXT4_FS_POSIX_ACL=y
> CONFIG_EXT4_FS_SECURITY=y
> # CONFIG_EXT4_DEBUG is not set
>
> I would suggest that, as I thought, you do not have to add anything to
> /etc/fstab to get acl's, in fact you have to add something to turn them
> off.
>
> Rowland
>
>
>


-- 
Denis Cardon
Tranquil IT Systems
44 bvd des pas enchantés
44230 Saint Sébastien sur Loire
tel : +33 (0) 2.40.97.57.57
http://www.tranquil-it-systems.fr