Release Announcements
=====================
-This is the first preview release of Samba 4.7. This is *not*
+This is the first preview release of Samba 4.12. 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 4.7 will be the next version of the Samba suite.
+Samba 4.12 will be the next version of the Samba suite.
UPGRADING
NEW FEATURES/CHANGES
====================
-Samba AD with MIT Kerberos
---------------------------
-
-After four years of development, Samba finally supports compiling and
-running Samba AD with MIT Kerberos. You can enable it with:
-
- ./configure --with-system-mitkrb5
-
-Samba requires version 1.15.1 of MIT Kerberos to build with AD DC support.
-The krb5-devel and krb5-server packages are required.
-The feature set is not on par with with the Heimdal build but the most important
-things, like forest and external trusts, are working. Samba uses the KDC binary
-provided by MIT Kerberos.
-
-Missing features, compared to Heimdal, are:
- * PKINIT support
- * S4U2SELF/S4U2PROXY support
- * RODC support (not fully working with Heimdal either)
-
-The Samba AD process will take care of starting the MIT KDC and it will load a
-KDB (Kerberos Database) driver to access the Samba AD database. When
-provisioning an AD DC using 'samba-tool' it will take care of creating a correct
-kdc.conf file for the MIT KDC. Note that 'samba-tool' will overwrite the system
-kdc.conf by default. It is possible to use a different location during
-provision. You should consult the 'samba-tool' help and smb.conf manpage for
-details.
-
-Dynamic RPC port range
-----------------------
-
-The dynamic port range for RPC services has been changed from the old default
-value 1024-1300 to 49152-65535. This port range is not only used by a
-Samba AD DC but also applies to all other server roles including NT4-style
-domain controllers. The new value has been defined by Microsoft in Windows
-Server 2008 and newer versions. To make it easier for Administrators to control
-those port ranges we use the same default and make it configureable with the
-option: 'rpc server dynamic port range'.
-
-The 'rpc server port' option sets the first available port from the new
-'rpc server dynamic port range' option. The option 'rpc server port' only
-applies to Samba provisioned as an AD DC.
-
-Authentication and Authorization audit support
-----------------------------------------------
-
-Detailed authentication and authorization audit information is now
-logged to Samba's debug logs under the "auth_audit" debug class,
-including in particular the client IP address triggering the audit
-line. Additionally, if Samba is compiled against the jansson JSON
-library, a JSON representation is logged under the "auth_json_audit"
-debug class.
-
-Audit support is comprehensive for all authentication and
-authorisation of user accounts in the Samba Active Directory Domain
-Controller, as well as the implicit authentication in password
-changes. In the file server and classic/NT4 domain controller, NTLM
-authentication, SMB and RPC authorization is covered, however password
-changes are not at this stage, and this support is not currently
-backed by a testsuite.
-
-
-Query record for open file or directory
----------------------------------------
-
-The record attached to an open file or directory in Samba can be
-queried through the 'net tdb locking' command. In clustered Samba this
-can be useful to determine the file or directory triggering
-corresponding "hot" record warnings in ctdb.
-
-
-Parameter changes
------------------
-
-The "strict sync" global parameter has been changed from
-a default of "no" to "yes". This means smbd will by default
-obey client requests to synchronize unwritten data in operating
-system buffers safely onto disk. This is a safer default setting
-for modern SMB1/2/3 clients.
+Python 3.5 Required
+-------------------
-smb.conf changes
+Samba's minimum runtime requirement for python was raised to Python
+3.4 with samba 4.11. Samba 4.12 raises this minimum version to Python
+3.5 both to access new features and because this is the oldest version
+we test with in our CI infrastructure.
+
+(Build time support for the file server with Python 2.6 has not
+changed)
+
+GnuTLS 3.4.7 required
+---------------------
+
+Samba is making efforts to remove in-tree cryptographic functionality,
+and to instead rely on externally maintained libraries. To this end,
+Samba has chosen GnuTLS as our standard cryptographic provider.
+
+Samba now requires GnuTLS 3.4.7 to be installed (including development
+headers at build time) for all configurations, not just the Samba AD
+DC.
+
+Using GnuTLS for SMB3 encryption you will notice huge performance and copy
+speed improvements. Tests with the CIFS Kernel client from Linux Kernel 5.3
+show a 3x speed improvement for writing and a 2.5x speed improvement for reads!
+
+NOTE WELL: The use of GnuTLS means that Samba will honour the
+system-wide 'FIPS mode' (a reference to the US FIPS-140 cryptographic
+standard) and so will not operate in many still common situations if
+this system-wide parameter is in effect, as many of our protocols rely
+on outdated cryptography.
+
+A future Samba version will mitigate this to some extent where good
+cryptography effectively wraps bad cryptography, but for now that above
+applies.
+
+
+"net ads kerberos pac save" and "net eventlog export"
+-----------------------------------------------------
+
+The "net ads kerberos pac save" and "net eventlog export" tools will
+no longer silently overwrite an existing file during data export. If
+the filename given exits, an error will be shown.
+
+REMOVED FEATURES
================
- Parameter Name Description Default
- -------------- ----------- -------
- auth event notification New parameter no
- auth methods Deprecated
- map untrusted to domain Deprecated
- strict sync Default changed yes
+The smb.conf parameter "write cache size" has been removed.
-Removal of lpcfg_register_defaults_hook()
------------------------------------------
+Since the in-memory write caching code was written, our write path has
+changed significantly. In particular we have gained very flexible
+support for async I/O, with the new linux io_uring interface in
+development. The old write cache concept which cached data in main
+memory followed by a blocking pwrite no longer gives any improvement
+on modern systems, and may make performance worse on memory-contrained
+systems, so this functionality should not be enabled in core smbd
+code.
-The undocumented and unsupported function lpcfg_register_defaults_hook()
-that was used by external projects to call into Samba and modify
-smb.conf default parameter settings has been removed. If your project
-was using this call please raise the issue on
-samba-technical@lists.samba.org in order to design a supported
-way of obtaining the same functionality.
+In addition, it complicated the write code, which is a performance
+critical code path.
-Change of loadable module interface
------------------------------------
+If required for specialist purposes, it can be recreated as a VFS
+module.
-The _init function of all loadable modules in Samba has changed
-from:
+BIND9_FLATFILE deprecated
+-------------------------
-NTSTATUS _init(void);
+The BIND9_FLATFILE DNS backend is deprecated in this release and will
+be removed in the future. This was only practically useful on a single
+domain controller or under expert care and supervision.
-to:
+This release removes the "rndc command" smb.conf parameter, which
+supported this configuration by writing out a list of DCs permitted to
+make changes to the DNS Zone and nudging the 'named' server if a new
+DC was added to the domain. Administrators using BIND9_FLATFILE will
+need to maintain this manually from now on.
+
+smb.conf changes
+================
-NTSTATUS _init(TALLOC_CTX *);
+ Parameter Name Description Default
+ -------------- ----------- -------
-This allows a program loading a module to pass in a long-lived
-talloc context (which must be guaranteed to be alive for the
-lifetime of the module). This allows modules to avoid use of
-the talloc_autofree_context() (which is inherently thread-unsafe)
-and still be valgrind-clean on exit. Modules that don't need to
-free long-lived data on exist should use the NULL talloc context.
+ nfs4:acedup Changed default merge
+ rndc command Removed
+ write cache size Removed
KNOWN ISSUES
============
-https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.7#Release_blocking_bugs
+https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.12#Release_blocking_bugs
#######################################
git.samba.org / samba.git / blobdiff