• [Announce] Samba 4.3.0rc3 Available for Download

    From Stefan Metzmacher@21:1/5 to All on Tue Aug 18 14:10:02 2015
    XPost: linux.samba

    Release Announcements

    This is the third release candidate of Samba 4.3. This is *not*
    intended for production environments and is designed for testing
    purposes only. Please report any defects via the Samba bug reporting
    system at https://bugzilla.samba.org/.

    Samba 4.3 will be the next version of the Samba suite.


    Nothing special.



    The logging code now supports logging to multiple backends. In
    addition to the previously available syslog and file backends, the
    backends for logging to the systemd-journal, lttng and gpfs have been
    added. Please consult the section for the 'logging' parameter in the
    smb.conf manpage for details.


    Support for Apple's Spotlight has been added by integrating with Gnome

    For detailed instructions how to build and setup Samba for Spotlight,
    please see the Samba wiki: <https://wiki.samba.org/index.php/Spotlight>

    New FileChangeNotify subsystem

    Samba now contains a new subsystem to do FileChangeNotify. The
    previous system used a central database, notify_index.tdb, to store
    all notification requests. In particular in a cluster this turned out
    to be a major bottleneck, because some hot records need to be bounced
    back and forth between nodes on every change event like a new created

    The new FileChangeNotify subsystem works with a central daemon per
    node. Every FileChangeNotify request and every event are handled by an asynchronous message from smbd to the notify daemon. The notify daemon maintains a database of all FileChangeNotify requests in memory and
    will distribute the notify events accordingly. This database is
    asynchronously distributed in the cluster by the notify daemons.

    The notify daemon is supposed to scale a lot better than the previous implementation. The functional advantage is cross-node kernel change
    notify: Files created via NFS will be seen by SMB clients on other
    nodes per FileChangeNotify, despite the fact that popular cluster file
    systems do not offer cross-node inotify.

    Two changes to the configuration were required for this new subsystem:
    The parameters "change notify" and "kernel change notify" are not
    per-share anymore but must be set globally. So it is no longer
    possible to enable or disable notify per share, the notify daemon has
    no notion of a share, it only works on absolute paths.

    New SMB profiling code

    The code for SMB (SMB1, SMB2 and SMB3) profiling uses a tdb instead
    of sysv IPC shared memory. This avoids performance problems and NUMA
    effects. The profile stats are a bit more detailed than before.

    Improved DCERPC man in the middle detection for kerberos --------------------------------------------------------

    The gssapi based kerberos backends for gensec have support for
    DCERPC header signing when using DCERPC_AUTH_LEVEL_PRIVACY.

    SMB signing required in winbindd by default -------------------------------------------

    The effective value for "client signing" is required
    by default for winbindd, if the primary domain uses active directory.

    Experimental NTDB was removed

    The experimental NTDB library introduced in Samba 4.0 has been
    removed again.

    Improved support for trusted domains (as AD DC) -----------------------------------------------

    The support for trusted domains/forests has improved a lot.

    samba-tool got "domain trust" subcommands to manage trusts:

    create - Create a domain or forest trust.
    delete - Delete a domain trust.
    list - List domain trusts.
    namespaces - Manage forest trust namespaces.
    show - Show trusted domain details.
    validate - Validate a domain trust.

    External trusts between individual domains work in both ways
    (inbound and outbound). The same applies to root domains of
    a forest trust. The transitive routing into the other forest
    is fully functional for kerberos, but not yet supported for NTLMSSP.

    While a lot of things are working fine, there are currently a few limitations:

    - Both sides of the trust need to fully trust each other!
    - No SID filtering rules are applied at all!
    - This means DCs of domain A can grant domain admin rights
    in domain B.
    - It's not possible to add users/groups of a trusted domain
    into domain groups.

    SMB 3.1.1 supported

    Both client and server have support for SMB 3.1.1 now.

    This is the dialect introduced with Windows 10, it improves the secure negotiation of SMB dialects and features.

    There's also a new optinal encryption algorithm aes-gcm-128,
    but for now this is only selected as fallback and aes-ccm-128
    is preferred because of the better performance. This might change
    in future versions when hardware encryption will be supported.
    See https://bugzilla.samba.org/show_bug.cgi?id=11451.

    New smbclient subcommands

    - Query a directory for change notifications: notify <dir name>
    - Server side copy: scopy <source filename> <destination filename>

    New rpcclient subcommands

    netshareenumall - Enumerate all shares
    netsharegetinfo - Get Share Info
    netsharesetinfo - Set Share Info
    netsharesetdfsflags - Set DFS flags
    netfileenum - Enumerate open files
    netnamevalidate - Validate sharename
    netfilegetsec - Get File security
    netsessdel - Delete Session
    netsessenum - Enumerate Sessions
    netdiskenum - Enumerate Disks
    netconnenum - Enumerate Connections
    netshareadd - Add share
    netsharedel - Delete share

    New modules

    idmap_script - see 'man 8 idmap_script'
    vfs_unityed_media - see 'man 8 vfs_unityed_media'
    vfs_shell_snap - see 'man 8 vfs_shell_snap'

    New sparsely connected replia graph (Improved KCC) --------------------------------------------------

    The Knowledge Consistency Checker (KCC) maintains a replication graph
    for DCs across an AD network. The existing Samba KCC uses a fully
    connected graph, so that each DC replicates from all the others, which
    does not scale well with large networks. In 4.3 there is an
    experimental new KCC that creates a sparsely connected replication
    graph and closely follows Microsoft's specification. It is turned off
    by default. To use the new KCC, set "kccsrv:samba_kcc=true" in
    smb.conf and let us know how it goes. You should consider doing this
    if you are making a large new network. For small networks there is
    little benefit and you can always switch over at a later date.

    Configurable TLS protocol support, with better defaults -------------------------------------------------------

    The "tls priority" option can be used to change the supported TLS
    protocols. The default is to disable SSLv3, which is no longer
    considered secure.

    Samba-tool now supports all 7 FSMO roles -------------------------------------------------------

    Previously "samba-tool fsmo" could only show, transfer or seize the
    five well-known FSMO roles:

    Schema Master
    Domain Naming Master
    RID Master
    PDC Emulator
    Infrastructure Master

    It can now also show, transfer or seize the DNS infrastructure roles:

    DomainDnsZones Infrastructure Master
    ForestDnsZones Infrastructure Master

    CTDB logging changes

    The destination for CTDB logging is now set via a single new
    configuration variable CTDB_LOGGING. This replaces CTDB_LOGFILE and CTDB_SYSLOG, which have both been removed. See ctdbd.conf(5) for
    details of CTDB_LOGGING.

    CTDB no longer runs a separate logging daemon.

    CTDB NFS support changes

    CTDB's NFS service management has been combined into a single 60.nfs
    event script. This updated 60.nfs script now uses a call-out to
    interact with different NFS implementations. See the CTDB_NFS_CALLOUT
    option in the ctdbd.conf(5) manual page for details. A default
    call-out is provided to interact with the Linux kernel NFS
    implementation. The 60.ganesha event script has been removed - a
    sample call-out is provided for NFS Ganesha, based on this script.

    The method of configuring NFS RPC checks has been improved. See ctdb/config/nfs-checks.d/README for details.

    Improved Cross-Compiling Support

    A new "hybrid" build configuration mode is added to improve
    cross-compilation support.

    A common challenge in cross-compilation is that of obtaining the results
    of tests that have to run on the target, during the configuration
    phase of the build. The Samba build system already supports the following
    means to do so:

    - Executing configure tests using the --cross-execute parameter
    - Obtaining the results from an answers file using the --cross-answers

    The first method has the drawback of inaccurate results if the tests are
    run using an emulator, or a need to be connected to a running target
    while building, if the tests are to be run on an actual target. The
    second method presents a challenge of figuring out the test results.

    The new hybrid mode runs the tests and records the result in an answer file.
    To activate this mode, use both --cross-execute and --cross-answers in the
    same configure invocation. This mode can be activated once against a
    running target, and then the generated answers file can be used in
    subsequent builds.

    Also supplied is an example script that can be used as the
    cross-execute program. This script copies the test to a running target
    and runs the test on the target, obtaining the result. The obtained
    results are more accurate than running the test with an emulator, because
    they reflect the exact kernel and system libraries that exist on the


    smb.conf changes

    Parameter Name Description Default
    -------------- ----------- -------
    logging New (empty)
    msdfs shuffle referrals New no
    smbd profiling level New off
    spotlight New no
    tls priority New NORMAL:-VERS-SSL3.0
    use ntdb Removed
    change notify Changed to [global]
    kernel change notify Changed to [global]
    client max protocol Changed default SMB3_11
    server max protocol Changed default SMB3_11

    Removed modules

    vfs_notify_fam - see section 'New FileChangeNotify subsystem'.


    Currently none.

    CHANGES SINCE 4.3.0rc2

    o Andrew Bartlett <abartlet@samba.org>
    * Bug 11436: samba-tool uncaught exception error
    * Bug 10493: revert LDAP extended rule 1.2.840.113556.1.4.1941

    o Ralph Boehme <slow@samba.org>
    * Bug 11278: Stream names with colon don't work with
    fruit:encoding = native
    * Bug 11426: net share allowedusers crashes

    o Amitay Isaacs <amitay@gmail.com>
    * Bug 11432: Fix crash in nested ctdb banning
    * Bug 11434: Cannot build ctdbpmda
    * Bug 11431: CTDB's eventscript error handling is broken

    o Stefan Metzmacher <metze@samba.org>
    * Bug 11451: Poor SMB3 encryption performance with AES-GCM (part1)
    * Bug 11316: tevent_fd needs to be destroyed before closing the fd

    o Arvid Requate <requate@univention.de>
    * Bug 11291: NetApp joined to a Samba/ADDC cannot resolve SIDs

    o Martin Schwenke <martin@meltin.net>
    * Bug 11432: Fix crash in nested ctdb banning

    CHANGES SINCE 4.3.0rc1

    o Jeremy Allison <jra@samba.org>
    * BUG 11359: strsep is not available on Solaris

    o Björn Baumbach <bb@sernet.de>
    * BUG 11421: Build with GPFS support is broken

    o Justin Maggard <jmaggard@netgear.com>
    * BUG 11320: "force group" with local group not working

    o Martin Schwenke <martin@meltin.net
    * BUG 11424: Build broken with --disable-python

    Reporting bugs & Development Discussion

    Please discuss this release on the samba-technical mailing list or by
    joining the #samba-technical IRC channel on irc.freenode.net.

    If you do report problems then please try to send high quality
    feedback. If you don't provide vital information to help us track down
    the problem then you will probably be ignored. All bug reports should
    be filed under the "Samba 4.1 and newer" product in the project's Bugzilla database (https://bugzilla.samba.org/).

    == Our Code, Our Bugs, Our Responsibility.
    == The Samba Team ======================================================================

    Download Details

    The uncompressed tarballs and patch files have been signed
    using GnuPG (ID 6568B7EA). The source code can be downloaded


    The release notes are available online at:


    Our Code, Our Bugs, Our Responsibility.

    The Samba Team

    Version: GnuPG v1

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