Re: Samba 4 provisioning error on Ubuntu 12.04

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On 21/06/12 12:30, Rowland Penny wrote:
On 21/06/12 10:16, steve wrote:
On 06/21/2012 10:24 AM, Rowland Penny wrote:
On 21/06/12 07:42, steve wrote:
On 06/21/2012 08:27 AM, Andrew Bartlett wrote:
On Wed, 2012-06-20 at 14:17 -0700, todd kman wrote:
Let's start from the top: - Is libacl-dev1 installed on your system?
** I think that should be:

Here is the fstab entry on a working 12.04:
UUID=f99d4f08-6123-4941-8ee2-a260d22ddce5 / ext4 errors=remount-ro,acl,user_xattr 0 1


Hmm, this is interesting, this is what I have in my /etc/fstab on Ubuntu 12.04 server

# /etc/fstab: static file system information.
# / was on /dev/sda1 during installation
UUID=63c10807-be9a-4aed-bf2f-fa52e53fc162 / ext4 errors=remount-ro 0 1
# /home was on /dev/sda6 during installation
UUID=3826e336-978b-43e6-b02f-83694b132ed3 /home ext4 defaults 0 2

cat /proc/mounts
/dev/disk/by-uuid/63c10807-be9a-4aed-bf2f-fa52e53fc162 / ext4 rw,relatime,errors=remount-ro,user_xattr,barrier=1,data=ordered 0 0
/dev/sda6 /home ext4 rw,relatime,user_xattr,barrier=1,data=ordered 0 0

This passes the acl test on even though acl is not mentioned (it is installed) and Samba4 from git compiles and installs ok. Do I need to add acl to my /etc/fstab lines? user_xattr seems to be a default setting.


Hi Rowland
My Samba4 is installed at /usr/local/bin on the / partition of the disk so I added acl,user_xattr to the / line in fstab and rebuilt with libacl1-dev installed, having read a post on the Ubuntu forum. Before this, I had the same s3fs error when provisioning.

/proc/mounts here gives the same output as yours so It looks as if the acl parameter is not needed, but no harm in trying. Are you able to reboot if you change fstab? If my memory server me correctly, remounting didn't work.

Sorry can't be more positive.

Well, I could try adding acl to the relevant /etc/fstab lines but as I said Samba4 compiled, installed & provisioned without complaining about it being missing. The acl test from the howto was passed on the relevant partitions, so I am wondering if I do need to alter my /etc/fstab. Is there anybody out there, with more knowledge than me, who can confirm one way or the other?


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

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 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 for more information
                            about acl.

If I run:
cat /boot/config-3.2.0-25-generic | grep CONFIG_EXT4
I get:
# 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.


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