Samba 4.3 Features added/changed: Difference between revisions

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* Jeremy Allison <jra@samba.org>
* Jeremy Allison <jra@samba.org>
:* [https://bugzilla.samba.org/show_bug.cgi?id= 10252 BUG #10252]: s3: smbd: Fix our access-based enumeration on "hide unreadable" to match Windows.
:* [https://bugzilla.samba.org/show_bug.cgi?id= 10252 BUG #10252]: s3: smbd: Fix our access-based enumeration on "hide unreadable" to match Windows.
:* [https://bugzilla.samba.org/show_bug.cgi?id= 10634 BUG #10634]: smbd: Fix file name buflen and padding in notify repsonse.
:* [https://bugzilla.samba.org/show_bug.cgi?id= 10634 BUG #10634]: smbd: Fix file name buflen and padding in notify repsonse.
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11486 BUG #11486]: s3: smbd: Fix mkdir race condition.
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11486 BUG #11486]: s3: smbd: Fix mkdir race condition.
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11522 BUG #11522]: s3: smbd: Fix opening/creating :stream files on the root share directory.
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11522 BUG #11522]: s3: smbd: Fix opening/creating :stream files on the root share directory.
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11535 BUG #11535]: s3: smbd: Fix NULL pointer bug introduced by previous 'raw'
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11535 BUG #11535]: s3: smbd: Fix NULL pointer bug introduced by previous 'raw'
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11522 BUG #11522]:stream fix .
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11522 BUG #11522]:stream fix .
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11555 BUG #11555]: s3: lsa: lookup_name() logic for unqualified (no DOMAIN\component) names is incorrect.
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11555 BUG #11555]: s3: lsa: lookup_name() logic for unqualified (no DOMAIN\component) names is incorrect.
* Ralph Boehme <slow@samba.org>
* Ralph Boehme <slow@samba.org>
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11535 BUG #11535]: s3: smbd: Fix a crash in unix_convert().
:* [https://bugzilla.samba.org/show_bug.cgi?id= 11535 BUG #11535]: s3: smbd: Fix a crash in unix_convert().

Revision as of 19:36, 20 October 2015

Samba 4.3.1

Release Notes for Samba 4.3.1
October 20, 2015

This is the latest stable release of Samba 4.3.

Changes since 4.3.0:

  • Jeremy Allison <jra@samba.org>
  • Ralph Boehme <slow@samba.org>
  • Günther Deschner <gd@samba.org>
  • Volker Lendecke <vl@samba.org>
  • Stefan Metzmacher <metze@samba.org>
  • 11316 BUG #11316: s3:ctdbd_conn: make sure we destroy tevent_fd before closing the socket.
  • 11515 BUG #11515: s4:lib/messaging: Use 'msg.lock' and 'msg.sock' for messaging related subdirs.
  • 11526 BUG #11526: lib/param: Fix hiding of FLAG_SYNONYM values.
  • Björn Jacke <bj@sernet.de>
  • Har Gagan Sahai <SHarGagan@novell.com>
  • Andreas Schneider <asn@samba.org>
  • Uri Simchoni <uri@samba.org>
https://www.samba.org/samba/history/samba-4.3.1.html

Samba 4.3.0

Release Notes for Samba 4.3.0
September 8, 2015

This is the first stable release of Samba 4.3.

UPGRADING

Read the "New FileChangeNotify subsystem" and "smb.conf changes" sections (below).


NEW FEATURES

Logging

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.

Spotlight

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

For detailed instructions how to build and setup Samba for Spotlight, please see here.

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 file.

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 BUG #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 parameter

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 target.

Improved Sparse File Support


Support for the FSCTL_SET_ZERO_DATA and FSCTL_QUERY_ALLOCATED_RANGES SMB2 requests has been added to the smbd file server.

This allows for clients to deallocate (hole punch) regions within a sparse file, and check which portions of a file are allocated.

Changes

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'.

KNOWN ISSUES

Currently none.

CHANGES SINCE 4.2.0rc4

  • Andrew Bartlett <abartlet@samba.org>
  • BUG #10973: No objectClass found in replPropertyMetaData on ordinary objects (non-deleted)
  • BUG #11429: Python bindings don't check integer types
  • BUG #11430: Python bindings don't check array sizes
  • Ralph Boehme <slow@samba.org>
  • BUG #11467: Handling of 0 byte resource fork stream
  • Volker Lendecke <vl@samba.org>
  • BUG #11488: AD samr GetGroupsForUser fails for users with "()" in their name
  • Stefan Metzmacher <metze@samba.org>
  • BUG #11429: Python bindings don't check integer types
  • Matthieu Patou <mat@matws.net>
  • BUG #10973: No objectClass found in replPropertyMetaData on ordinary objects (non-deleted)

CHANGES SINCE 4.2.0rc3

  • Ralph Boehme <slow@samba.org>
  • BUG #11444: Crash in notify_remove caused by change notify = no
  • Günther Deschner <gd@samba.org>
  • BUG #11411: smbtorture does not build when configured --with-system-mitkrb5
  • Volker Lendecke <vl@samba.org>
  • BUG #11455: fix recursion problem in rep_strtoll in lib/replace/replace.c
  • BUG #11464: xid2sid gives inconsistent results
  • BUG #11465: ctdb: Fix the build on FreeBSD 10.1
  • Roel van Meer <roel@1afa.com>
  • BUG #11427: nmbd incorrectly matches netbios names as own name
  • Stefan Metzmacher <metze@samba.org>
  • BUG #11451: Poor SMB3 encryption performance with AES-GCM
  • BUG #11458: --bundled-libraries=!ldb,!pyldb,!pyldb-util doesn't disable ldb build and install
  • Andreas Schneider <asn@samba.org>
  • BUG #9862: Samba "map to guest = Bad uid" doesn't work

CHANGES SINCE 4.3.0rc2

  • 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 LDAP_MATCHING_RULE_IN_CHAIN changes
  • Ralph Boehme <slow@samba.org>
  • BUG #11278: Stream names with colon don't work with fruit:encoding = native
  • BUG #11426: net share allowedusers crashes
  • Amitay Isaacs <amitay@gmail.com>

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>


CHANGES SINCE 4.2.0rc1

  • Jeremy Allison <jra@samba.org>
  • Björn Baumbach <bb@sernet.de>
  • Justin Maggard <jmaggard@netgear.com>
  • BUG #11320: "force group" with local group not working
  • Martin Schwenke <martin@meltin.net
https://www.samba.org/samba/history/samba-4.3.0.html