How to install latest Samba4 on Ubuntu?

[insiki2]

Hello.
I want to make AD/DC Samba4 server.
When i install Samba4 on Ubuntu Server 13.10 i have errors.
Look.

Preparing system.

apt-get install build-essential libacl1-dev libattr1-dev \
libblkid-dev libgnutls-dev libreadline-dev python-dev \
python-dnspython gdb pkg-config libpopt-dev libldap2-dev \
dnsutils libbsd-dev attr krb5-user docbook-xsl libcups2-dev acl

Enable ACL support

cat /etc/fstab
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb1 during installation
UUID=dffa8d87-bae2-4002-b118-3108f9b8e20e / ext4 errors=remount-ro,user_xattr,acl,barrier=1 0 1
# swap was on /dev/sdb5 during installation
UUID=10ff38ce-54b6-459b-82a9-93566f02d401 none swap sw 0 0

Rebooting server and installing samba4

sudo apt-get install samba4 samba4-common-bin

Get error

Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr

Try to configure

sudo samba-tool domain provision
Realm: tps7.local
Domain [tps7]: tps7
Server Role (dc, member, standalone) [dc]: dc
DNS backend (SAMBA_INTERNAL, BIND9_FLATFILE, BIND9_DLZ, NONE) [SAMBA_INTERNAL]: SAMBA_INTERNAL
DNS forwarder IP address (write 'none' to disable forwarding) [192.168.1.1]: 192.168.1.1
Administrator password:
Retype password:
Looking up IPv4 addresses
Looking up IPv6 addresses
No IPv6 address will be assigned
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Setting up secrets.ldb
Setting up the registry
Setting up the privileges database
Setting up idmap db
Setting up SAM db
Setting up sam.ldb partitions and settings
Setting up sam.ldb rootDSE
Pre-loading the Samba 4 and AD schema
Adding DomainDN: DC=tps7,DC=local
Adding configuration container
Setting up sam.ldb schema
Setting up sam.ldb configuration data
Setting up display specifiers
Modifying display specifiers
Adding users container
Modifying users container
Adding computers container
Modifying computers container
Setting up sam.ldb data
Setting up well known security principals
Setting up sam.ldb users and groups
Setting up self join
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_x

It's true, there is no folder .../samba/vfs and there is no file "acl_xattr.so"
Google asked me that it fixed in Samba 4.0.9.

Okay.
Im trying to build *.deb packet from sources, coz make / make install is not good way (for future - updating and etc.)
Installing auto-apt и checkinstall

sudo apt-get install auto-apt
sudo apt-get install checkinstall

Go to the home directory

cd

Take last version

wget http://www.samba.org/samba/ftp/samba-latest.tar.gz

Extract

tar xzf samba*

Create package

cd samba*
sudo auto-apt -y run ./configure
sudo make
sudo checkinstall -D --install=no

Install

sudo dpkg -i samba4_4.1.4-1_amd64.deb

And what i have?..

cd /usr/local/samba

 sudo samba-tool
Traceback (most recent call last):
  File "/usr/bin/samba-tool", line 33, in <module>
    from samba.netcmd.main import cmd_sambatool
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/main.py", line 24, in <module>
    from samba.netcmd.delegation import cmd_delegation
  File "/usr/lib/python2.7/dist-packages/samba/netcmd/delegation.py", line 23, in <module>
    from samba import provision
  File "/usr/lib/python2.7/dist-packages/samba/provision/__init__.py", line 46, in <module>
    from samba.samba3 import smbd, passdb
ImportError: libdfs_server_ad.so: cannot open shared object file: No such file or directory

wt..?

[insiki2]

Before i'm trying to install Samba-4.1.4 on Ubuntu Server 12.04 from sources and got error..

cat /etc/fstab

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb1 during installation
UUID=6a5a4984-594c-4074-9fc4-d7ddc9d907d7 / ext4 acl,user_xattr,errors=remount-ro 0 1
# swap was on /dev/sdb5 during installation
UUID=10ff38ce-54b6-459b-82a9-93566f02d401 none swap sw 0 0

sudo samba-tool domain provision

Realm: tps7.local
Domain [tps7]: tps7
Server Role (dc, member, standalone) [dc]: dc
DNS backend (SAMBA_INTERNAL, BIND9_FLATFILE, BIND9_DLZ, NONE) [SAMBA_INTERNAL]: BIND9_DLZ
Administrator password:
Retype password:
Looking up IPv4 addresses
Looking up IPv6 addresses
No IPv6 address will be assigned
ldb: module schema_load initialization failed : No such object
ldb: module rootdse initialization failed : No such object
ldb: module samba_dsdb initialization failed : No such object
ldb: Unable to load modules for /var/lib/samba/private/sam.ldb: (null)
samdb_connect failed
VFS connect failed!
ERROR(<class 'samba.provision.ProvisioningError'>): Provision failed - ProvisioningError: Your filesystem or build does not support posix ACLs, which s3fs requires. Try the mounting the filesystem with the 'acl' option.
File "/usr/lib/python2.7/dist-packages/samba/netcmd/domain.py", line 398, in run
use_rfc2307=use_rfc2307, skip_sysvolacl=False)
File "/usr/lib/python2.7/dist-packages/samba/provision/__init__.py", line 2052, in provision
raise ProvisioningError("Your filesystem or build does not support posix ACLs, which s3fs requires. Try the mounting the filesystem with the 'acl' option.")

[lingpanda]

Before i'm trying to install Samba-4.1.4 on Ubuntu Server 12.04 from sources and got error..

cat /etc/fstab

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> <type> <options> <dump> <pass>
# / was on /dev/sdb1 during installation
UUID=6a5a4984-594c-4074-9fc4-d7ddc9d907d7 / ext4 acl,user_xattr,errors=remount-ro 0 1
# swap was on /dev/sdb5 during installation
UUID=10ff38ce-54b6-459b-82a9-93566f02d401 none swap sw 0 0

sudo samba-tool domain provision

Realm: tps7.local
Domain [tps7]: tps7
Server Role (dc, member, standalone) [dc]: dc
DNS backend (SAMBA_INTERNAL, BIND9_FLATFILE, BIND9_DLZ, NONE) [SAMBA_INTERNAL]: BIND9_DLZ
Administrator password:
Retype password:
Looking up IPv4 addresses
Looking up IPv6 addresses
No IPv6 address will be assigned
ldb: module schema_load initialization failed : No such object
ldb: module rootdse initialization failed : No such object
ldb: module samba_dsdb initialization failed : No such object
ldb: Unable to load modules for /var/lib/samba/private/sam.ldb: (null)
samdb_connect failed
VFS connect failed!
ERROR(<class 'samba.provision.ProvisioningError'>): Provision failed - ProvisioningError: Your filesystem or build does not support posix ACLs, which s3fs requires. Try the mounting the filesystem with the 'acl' option.
File "/usr/lib/python2.7/dist-packages/samba/netcmd/domain.py", line 398, in run
use_rfc2307=use_rfc2307, skip_sysvolacl=False)
File "/usr/lib/python2.7/dist-packages/samba/provision/__init__.py", line 2052, in provision
raise ProvisioningError("Your filesystem or build does not support posix ACLs, which s3fs requires. Try the mounting the filesystem with the 'acl' option.")

I would replace the following line

UUID=dffa8d87-bae2-4002-b118-3108f9b8e20e / ext4 errors=remount-ro,user_xattr,acl,barrier=1 0 1

With

UUID=dffa8d87-bae2-4002-b118-3108f9b8e20e / ext4 errors=remount-ro,user_xattr,acl,barrier=1 1     1

Notice I replaced the zero with a 1. After a failed domain provision you must remove all traces of your initial Samba install or you will get errors about "ProvisioningError("Your filesystem or build does not support posix ACLs, which s3fs requires. Try the mounting the filesystem with the 'acl' option.")."

[insiki2]

I changed 0 to 1 and got
sudo apt-get install samba4

Чтение списков пакетов… Готово
Построение дерева зависимостей
Чтение информации о состоянии… Готово
Предлагаемые пакеты:
  phpldapadmin samba-gtk swat2 ntp
НОВЫЕ пакеты, которые будут установлены:
  samba4
обновлено 0, установлено 1 новых пакетов, для удаления отмечено 0 пакетов, и 0 пакетов не обновлено.
Необходимо скачать 0 B/1 691 kB архивов.
После данной операции, объём занятого дискового пространства возрастёт на 11,1 MB.
Предварительная настройка пакетов ...
Выбор ранее не выбранного пакета samba4.
(Чтение базы данных … на данный момент установлено 96993 файла и каталога.)
Распаковывается пакет samba4 (из файла …/samba4_4.0.3+dfsg1-0.1ubuntu1_amd64.deb) …
Обрабатываются триггеры для ureadahead …
Обрабатываются триггеры для man-db …
Настраивается пакет samba4 (4.0.3+dfsg1-0.1ubuntu1) …
Looking up IPv4 addresses
Looking up IPv6 addresses
No IPv6 address will be assigned
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Setting up share.ldb
Setting up secrets.ldb
Setting up the registry
Setting up the privileges database
Setting up idmap db
Setting up SAM db
Setting up sam.ldb partitions and settings
Setting up sam.ldb rootDSE
Pre-loading the Samba 4 and AD schema
Adding DomainDN: DC=localdomain
Adding configuration container
Setting up sam.ldb schema
Setting up sam.ldb configuration data
Setting up display specifiers
Modifying display specifiers
Adding users container
Modifying users container
Adding computers container
Modifying computers container
Setting up sam.ldb data
Setting up well known security principals
Setting up sam.ldb users and groups
Setting up self join
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Error loading module '/usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so': /usr/lib/x86_64-linux-gnu/samba//vfs/acl_xattr.so: cannot open shared object file: No such file or directory
error probing vfs module 'acl_xattr': NT_STATUS_UNSUCCESSFUL
smbd_vfs_init: vfs_init_custom failed for acl_xattr
Adding DNS accounts
Creating CN=MicrosoftDNS,CN=System,DC=localdomain
Creating DomainDnsZones and ForestDnsZones partitions
Populating DomainDnsZones and ForestDnsZones partitions
Setting up sam.ldb rootDSE marking as synchronized
Fixing provision GUIDs
A Kerberos configuration suitable for Samba 4 has been generated at /var/lib/samba/private/krb5.conf
Once the above files are installed, your Samba4 server will be ready to use
Server Role:           active directory domain controller
Hostname:              tps7dc01
NetBIOS Domain:        WORKGROUP
DNS Domain:            localdomain
DOMAIN SID:            S-1-5-21-2840583755-2156081812-968736069
samba4 start/running, process 15312
Обрабатываются триггеры для ureadahead …

[lingpanda]

Lets start from the beginning. Remove all traces of Samba. Use the following

apt-get autoremove purge samba4

Then look for all traces of Samba

locate /samba

Remove all traces of Samba you find. Autoremove should do this for you. If you find /usr/local/samba make sure to remove this Samba directory. Also remove any krb.conf file from /etc/.

Install the following

apt-get install build-essential libacl1-dev libattr1-dev libblkid-dev libgnutls-dev libreadline-dev python-dev python-dnspython gdb pkg-config libpopt-dev libldap2-dev dnsutils libbsd-dev attr krb5-user docbook-xsl libcups2-dev acl libpam0g-dev docbook-xsl xsltproc inkscape dnsutils

Download Samba as a tar.

wget http://ftp.samba.org/pub/samba/samba-4.1.5.tar.gz

  tar -zxvf samba-4.1.5.tar.gz

Change into the extracted folder

cd samba-4.1.5

Now we need to configure and make samba. These steps will take a while.

./configure
  sudo make
  sudo make install

Once this completes we can start configuring our Samba 4 Active Directory domain

sudo /usr/local/samba/bin/samba-tool domain provision

See below for info on XATTR Support.



File System Support

To use the advanced features of Samba4 you need a filesystem that supports both the "user" and "system" xattr namespaces.
ext3/ext4 File System

If you are using either ext3 or ext4 for your file system you will need to include the options "user_xattr","acl" and "barrier=1" in your /etc/fstab. For example:
/dev/mapper/samba4pdc-root / ext4 errors=remount-ro,user_xattr,acl,barrier=1 1 1
Simply change ext3 to ext4 if you are using it. Normally you will want to just modify the existing line to add those options. Please use caution when modifying your fstab as it can lead to an un-bootable system if the wrong thing is modified.
The barrier=1 option ensures that tdb transactions are safe against unexpected power loss. A number of sites have corrupted their AD database in sam.ldb by not having this option enabled.
You also need to compile your kernel with the XATTR, SECURITY, and POSIX_ACL options for your filesystem. For ext3 (change the 3 to a 4 for ext4) that means you need:
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_SECURITY=y
CONFIG_EXT3_FS_POSIX_ACL=y
If you are running a Linux 2.6 (or greater) kernel with CONFIG_IKCONFIG_PROC defined you can check this with the following command:
$ zgrep CONFIG_EXT3_FS /proc/config.gz
File Systems without xattr support

If you don't have a filesystem with xattr support, then you can simulate it by adding the following line to your smb.conf:
posix:eadb = /usr/local/samba/eadb.tdb
that will place all extra file attributes (NT ACLs, DOS EAs, streams etc), in that tdb. It is not efficient, and doesn't scale well, but at least it gives you a choice when you don't have a modern filesystem.
Testing your filesystem

To test your filesystem support, install the 'attr' package and run the following 4 commands as root:
# touch test.txt
# setfattr -n user.test -v test test.txt
# setfattr -n security.test -v test2 test.txt
# getfattr -d test.txt
# getfattr -n security.test -d test.txt
You should see output like this:
# file: test.txt
user.test="test"
# file: test.txt
security.test="test2"
For ACL testing do the following as root:
# touch test3.txt
# setfacl -m g:adm:rwx test3.txt
# getfacl test3.txt
and you should get a line like group:adm:rwx in your output.

If you get any "Operation not supported" errors then it means your kernel is not configured correctly, or your filesystem is not mounted with the right options.
If you get any "Operation not permitted" errors then it probably means you didn't try the test as root.
If you are using the posix:eadb option then you don't need to test your filesystem in this manner.