Release Announcements
=====================
-This is the first preview release of Samba 4.8. 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 4.8 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
====================
-KDC GPO application
+Python 3.5 Required
-------------------
-Adds Group Policy support for the samba kdc. Applies password policies
-(minimum/maximum password age, minimum password length, and password
-complexity) and kerberos policies (user/service ticket lifetime and
-renew lifetime).
-
-Adds the samba_gpoupdate script for applying and unapplying
-policy. Can be applied automatically by setting
-
- 'server services = +gpoupdate'.
-
-Time Machine Support with vfs_fruit
-===================================
-Samba can be configured as a Time Machine target for Apple Mac devices
-through the vfs_fruit module. When enabling a share for Time Machine
-support the relevant Avahi records to support discovery will be published
-for installations that have been built against the Avahi client library.
-
-Shares can be designated as a Time Machine share with the following setting:
-
- 'fruit:time machine = yes'
-
-Support for lower casing the MDNS Name
-======================================
-Allows the server name that is advertised through MDNS to be set to the
-hostname rather than the Samba NETBIOS name. This allows an administrator
-to make Samba registered MDNS records match the case of the hostname
-rather than being in all capitals.
-
-This can be set with the following settings:
-
- 'mdns name = mdns'
-
-Encrypted secrets
-=================
-Attributes deemed to be sensitive are now encrypted on disk. The sensitive
-values are currently:
- pekList
- msDS-ExecuteScriptPassword
- currentValue
- dBCSPwd
- initialAuthIncoming
- initialAuthOutgoing
- lmPwdHistory
- ntPwdHistory
- priorValue
- supplementalCredentials
- trustAuthIncoming
- trustAuthOutgoing
- unicodePwd
- clearTextPassword
-
-This encryption is enabled by default on a new provision or join, it
-can be disabled at provision or join time with the new option
---plaintext-secrets.
-
-However, an in-place upgrade will not encrypt the database.
-
-Once encrypted, it is not possible to do an in-place downgrade (eg to
-4.7) of the database. To obtain an unencrypted copy of the database a
-new DC join should be performed, specifying the --plaintext-secrets
-option.
-
-The key file "encrypted_secrets.key" is created in the same directory
-as the database and should NEVER be disclosed. It is included by the
-samba_backup script.
+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.
-smb.conf changes
-================
+(Build time support for the file server with Python 2.6 has not
+changed)
- Parameter Name Description Default
- -------------- ----------- -------
- auth methods Removed
- binddns dir New
- gpo update command New
- map untrusted to domain Removed
- oplock contention limit Removed
- prefork children New 1
- mdns name Added netbios
- fruit:time machine Added false
- profile acls Removed
- use spnego Removed
- winbind trusted domains only Removed
+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.
-NT4-style replication based net commands removed
-================================================
+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.
-The following commands and sub-commands have been removed from the
-"net" utility:
+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!
-net rpc samdump
-net rpc vampire ldif
+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.
-Also, replicating from a real NT4 domain with "net rpc vampire" and
-"net rpc vampire keytab" has been removed.
+A future Samba version will mitigate this to some extent where good
+cryptography effectively wraps bad cryptography, but for now that above
+applies.
-The NT4-based commands were accidentially broken in 2013, and nobody
-noticed the breakage. So instead of fixing them including tests (which
-would have meant writing a server for the protocols, which we don't
-have) we decided to remove them.
-For the same reason, the "samsync", "samdeltas" and "database_redo"
-commands have been removed from rpcclient.
+"net ads kerberos pac save" and "net eventlog export"
+-----------------------------------------------------
-"net rpc vampire keytab" from Active Directory domains continues to be
-supported.
+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.
-vfs_aio_linux module removed
-============================
+REMOVED FEATURES
+================
-The current Linux kernel aio does not match what Samba would
-do. Shipping code that uses it leads people to false
-assumptions. Samba implements async I/O based on threads by default,
-there is no special module required to see benefits of read and write
-request being sent do the disk in parallel.
+The smb.conf parameter "write cache size" has been removed.
-smbclient reparse point symlink parameters reversed
-===================================================
+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.
-A bug in smbclient caused the 'symlink' command to reverse the
-meaning of the new name and link target parameters when creating a
-reparse point symlink against a Windows server. As this is a
-little used feature the ordering of these parameters has been
-reversed to match the parameter ordering of the UNIX extensions
-'symlink' command. The usage message for this command has also
-been improved to remove confusion.
+In addition, it complicated the write code, which is a performance
+critical code path.
-REMOVED FEATURES
-================
+If required for specialist purposes, it can be recreated as a VFS
+module.
-The two commands "net serverid list" and "net serverid wipe" have been
-removed, because the file serverid.tdb is not used anymore.
+BIND9_FLATFILE deprecated
+-------------------------
+
+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.
+
+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
+================
-"net serverid list" can be replaced by listing all files in the
-subdirectory "msg.lock" of Samba's "lock directory". The unique id
-listed by "net serverid list" is stored in every process' lockfile in
-"msg.lock".
+ Parameter Name Description Default
+ -------------- ----------- -------
-"net serverid wipe" is not necessary anymore. It was meant primarily
-for clustered environments, where the serverid.tdb file was not
-properly cleaned up after single node crashes. Nowadays smbd and
-winbind take care of cleaning up the msg.lock and msg.sock directories
-automatically.
+ nfs4:acedup Changed default merge
+ rndc command Removed
+ write cache size Removed
KNOWN ISSUES
============
-https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.8#Release_blocking_bugs
+https://wiki.samba.org/index.php/Release_Planning_for_Samba_4.12#Release_blocking_bugs
#######################################
git.samba.org / samba.git / blobdiff