windows-notes-20050630

[openafs.git] / doc / txt / winnotes / afs-install-notes.txt

OpenAFS for Windows 1.3.8500 Installation Notes
-----------------------------------------------

The OpenAFS for Windows product was very poorly maintained throughout the 
1.2.x release cycle.  While the Unix version was being enhanced and its 
quality was improving the Windows version stagnated.  The IBM AFS 3.6 product 
was not designed for the Windows 2000/XP/2003 operating system nor was it 
architected with highly disconnected environments in mind.

The 1.3.x series of releases not only fixes a large number of bugs in the 1.2 
series but also attempts to enhance the functionality of the product to better 
fit the usage model of today's users.  Several items standout.  

0. The default AFSCache file is approximately 100MB.  This space is required 
in addition to the space allocated to OpenAFS binaries.


1. The Kerberos 4 infrastructure on which the 1.2 series is reliant is no 
longer secure.  Cross-realm Kerberos is very important in the AFS context and 
most sites have or are migrating to Kerberos 5 environments.  The 1.3 series 
integrates with the MIT Kerberos for Windows 2.6.x product to provide Kerberos 
5 functionality including the ability to auto-renew credentials and obtain 
single sign-on capabilities with the Microsoft Windows Kerberos Logon Service.

As of 1.3.65, the OpenAFS client will directly use Kerberos 5 tickets as tokens if 
KFW is installed.  The client requires that all of the AFS Servers with which it 
communicates support the use of Kerberos 5 tickets as tokens (aka 2b tokens).
This means that all of the AFS servers must be running OpenAFS release 1.2.8 or 
higher.  Transarc servers do not support Kerberos 5 tickets as tokens.

When using a Microsoft Windows Active Directory as the KDC which issues the 
service ticket for the AFS cell there are two things to consider.  First, the 
Kerberos 5 tickets issued by Active Directory can be quite large when compared 
to tickets issued by a traditional KDC due to the incorporation of 
authorization data in the PAC.  If this is your situation you either must 
modify your 1.2.x servers to support tokens larger than a few hundred bytes; 
or install the 1.3.64 or higher release on your servers.  Second, Windows 2003 
Active Directory will issue service tickets utilizing the DES-CBC-MD5 enctype. 
OpenAFS releases older than 1.3.64 will not properly support this enctype.


2. The AFS Client Service does not provide robust behavior in an environment 
with a plug-n-play network environment.  Changes to the number of network 
adapters or the assigned IP addresses will cause the service to panic.  The 
recommended work around for this problem is to install the Microsoft Loopback 
Adapter on the machine.  When the MLA is installed with a static IP address 
the AFS Client Service will bind only to the loopback and not be affected by 
changes to state of other network adapters installed on the system.  

Starting in the 1.3.65 release the installers provided by OpenAFS.org will 
install the Microsoft Loopback Adapter for you with a name of "AFS" and a 
pre-assigned IP address in the 10.x.x.x range.

One of the benefits of using the MLA is that the NETBIOS names used for the 
AFS Client's SMB server do not have to be published on any adapter other than 
the MLA.  This means that the names no longer need to be unique.  When the MLA 
is in use, the NETBIOS name associated with the AFS Client Service is simply 
"AFS".  When the MLA is not in use the NETBIOS name is "MACHINE-AFS".

When the MLA is installed, UNC paths of the form \\AFS\cellname\path may be used.

The MLA is installed with a binding to "Client for Microsoft Networks" but not 
to "File and Printer Sharing for Microsoft Networks".  If you fail to bind 
"Client Microsoft Networks" you will not be able to access the AFS Client 
Service when the machine is disconnected from the network.  If you bind "File 
and Printer Sharing ..." there will be a service type collision between the 
name "AFS" and the name of the machine on the published IP Address.  This will 
result in a failure to be able to access files in AFS.  The "NET VIEW" command 
will return a "System Error 52" message when this conflict exists.  To correct 
the problem:

 * stop the AFS Client Service
 * bind the "Client for Microsoft Networks" to the MLA
 * unbind "File and Printer Sharing for Microsoft Networks" from the MLA
 * Disable and then Enable the MLA
 * start the AFS Client Service


3. Traditionally, when the AFS Client Service starts it must be able to 
access the "root.afs" volume of the default cell.  The "root.afs" volume
contains a set of read-only and read-write mount points to the "root.cell"
volumes of various cells the administrator of the default cell believes
should be accessible.  If the "root.afs" volume is 
inaccessible when the client service is started, the service will panic.  
Since many users now use laptops or otherwise operate in disconnected 
environments in which a VPN may be needed to access the cell's servers, it is 
often the case that the "root.afs" volume for the default cell is not 
reachable and the AFS Client Service will not successfully start. 
 
The OpenAFS Client Service now supports a fake "root.afs" volume which is 
dynamically constructed when the service starts.  This mode is called 
Freelance mode.  Freelance mode is turned on by default.

The contents of the fake "root.afs" volume are constructed dynamically as
cells are accessed.  When the fake "root.afs" volume is constructed it will
only contain two mount points: a read-only and read-write mount point used
to access the "root.cell" volume of the default AFS cell.  Any attempt to
access a valid cell name will automatically result in a new mount point 
being created in the fake "root.afs" volume.  If the cellname begins with
a "." the mount point will be read-write; otherwise the mount point will
be read-only.  These mount points are preserved in the registry at key:

  HKLM\SOFTWARE\OpenAFS\Client\Freelance

Additional mount points may be manually created using the "fs mkmount"
command.  Mount points may be removed using the "fs rmmount" command.

    >fs mkmount \\AFS\all\athena.mit.edu root.cell athena.mit.edu
    >fs mkmount \\AFS\all\.athena.mit.edu root.cell athena.mit.edu -rw
    >fs rmmount \\AFS\all\athena.mit.edu
    >fs rmmount \\AFS\all\.athena.mit.edu

Beginning in 1.3.74, the Freelance fake root.afs volume will support
the creation of symlinks.

  >symlink make \\afs\all\link \\afs\all\athena.mit.edu\user\j\a\jaltman

  >symlink list \\afs\all\link
  '\\afs\all\link' is a symlink to 'athena.mit.edu\user\j\a\jaltman'

  >symlink rm \\afs\all\link

The symlinks are stored in the registry at:

  HKLM\SOFTWARE\OpenAFS\Client\Freelance\Symlinks 
     

4. The OpenAFS for Windows client will use AFSDB DNS records to 
discover cell information when it is not located in the local CellServDB file 
(\%PROGRAMFILES%\OpenAFS\Client\CellServDB).


5. OpenAFS for Windows 1.3.72 only supports Windows 2000, Windows XP, and 
Windows 2003.  Windows NT 4.0 and the entire Windows 9x/Me line are no
longer supported.  Older releases of OpenAFS are available for download
if those operating systems must be supported.  The last version with support
for Win9x is 1.2.2b.  The last version with support for Windows NT 4.0 is
1.2.10.


6. OpenAFS for Windows installs a WinLogon Network Provider to provide
Integrated Logon (Single Sign-on) functionality. Integrated Logon can be used 
when the Windows username and password match the username and password 
associated with the default cell's Kerberos realm.  For example, if the 
windows username is "jaltman" and the default cell is "athena.mit.edu", then 
Integrated Logon can be successfully used if the windows password matches the 
password used for the Kerberos principal "jaltman@ATHENA.MIT.EDU".

Integrated Logon is required if you desire the ability to store roaming user 
profiles within the AFS file system.  OpenAFS does not provide tools for 
synchronizing the Windows and Kerberos user accounts and passwords.

If KFW is installed, the Integrated Logon will use Kerberos 5 to obtain 
tokens.  Otherwise, Kerberos 4 is used.

There is a High Security mode for use with Integrated Logon when multiple 
users will share a single machine.  There are known problems with this mode.  
In particular, if you are using this mode it is crucial that new AFS tokens 
not be obtained after the logon session starts except via the AFS Systray tool 
as started by the AFS Network Provider.  If the AFS Systray tool is stopped 
you must log off to obtain new tokens.  Do not use external tools such as 
"aklog.exe" if High Security mode is turned on. As of 1.3.70, OpenAFS supports 
Authenticated SMB connections which removes the need for High Security mode. 
DO NOT USE IT!!!!! 

Starting in 1.3.83, when Integrated Logon is used in conjunction
with KFW, the Kerberos 5 tickets obtained during the process of 
generating AFS tokens are preserved and stored into the default
ccache within the user logon session.

What Integrated Logon does not do:
 (a) Integrated Logon does not have the ability to cache the user's 
     username and password for the purpose of obtaining tokens if the
     Kerberos KDC is inaccessible at logon time.


7. The AFS Systray tool (afscreds.exe) supports several command line 
options: 

    -A = autoinit 
    -E = force existing afscreds to exit
    -I = install startup shortcut
    -M = renew drive maps 
    -N = IP address change detection 
    -Q = quiet mode.  do not display start service dialog
         if afsd_service is not already running
    -S = show tokens dialog on startup
    -U = uninstall startup shortcut
    -X = test and do map share
    -Z = unmap drives
    -: = magic parameter for high security mode 

autoinit will result in automated attempts to acquire AFS tokens when 
afscreds.exe is started.  afscreds.exe will attempt to utilize tickets stored
in the MSLSA credentials cache; any existing CCAPI credentials cache; and
finally display an Obtain Tokens dialog to the user.  When used in combination 
with IP address change detection, afscreds.exe will attempt to acquire AFS 
tokens whenever the IP address list changes and the Kerberos KDC is 
accessible.

The renew drive maps option is used to ensure that the user drive maps 
constructed via the AFS tools (not NET USE) are re-constructed each time
afscreds.exe is started.

By default afscreds.exe is configured by the OpenAFS.org installers to use -A 
-N -M -Q as startup options.  Currently, there is no UI to change this selection 
after install time although these options may be altered via the registry either 
per machine or per user.  See AfscredsShortcutParams in registry.txt.


8. As of 1.3.71, the OpenAFS for Windows client supports a local Windows
authorization group called "AFS Client Admins".  This group is used in
place of the "Administrators" group to determine which users are allowed
to modify the AFS Client Service configuration via either afs_config.exe
or fs.exe.  For example, the following fs.exe commands are now restricted 
to members of the "AFS Client Admins" group:

    - checkservers with a non-zero timer value
    - setcachesize
    - newcell
    - sysname with a new sysname list
    - exportafs
    - setcell
    - setserverprefs
    - storebehind
    - setcrypt
    - cscpolicy
    - trace

Setting the default sysname for a machine should be done via the registry and 
not via "fs sysname".

The local "SYSTEM" account is always a member of the "AFS Client Admins" group.

The initial membership of the "AFS Client Admins" group when created by the 
installer is equivalent to the local "Administrators" group.  If a user is 
added to the "Administrators" group after the creation of the "AFS Client 
Admin" group, that user will not be an AFS Client Administrator.  Only users
that are members of the "AFS Client Admins" group are AFS Client 
Administrators.


9. The AFS Client should support UNC paths everywhere.  Power users that make
extensive use of the command line shell, cmd.exe, might want to consider using 
JP Software's 4NT command processor.  Unlike cmd.exe, 4NT does fully support
UNC paths and can use a UNC path as the default device.


10. The AFS Client ships with its own version of aklog.exe which should be 
used in preference to those obtained by third party sources.  The OpenAFS
aklog.exe supports Kerberos 5 as well as the ability to auto-generate
pts IDs for user's obtaining tokens to foreign cells.

Usage: aklog [-d] [[-cell | -c] cell [-k krb_realm]]
             [[-p | -path] pathname]
             [-noprdb] [-force]
             [-5 | -4]

   -d gives debugging information.
   krb_realm is the kerberos realm of a cell.
   pathname is the name of a directory to which you wish to authenticate.
   -noprdb means don't try to determine AFS ID.
   -5 or -4 selects whether to use Kerberos V or Kerberos IV.
      (default is Kerberos V)
   No commandline arguments means authenticate to the local cell.


11. The AFS Server functionality provided with OpenAFS 1.3.72 might work but 
should be considered highly experimental.  It has not been thoroughly tested.
Any data which would cause pain if lost should not be stored in an OpenAFS 
Server on Windows.

A few notes on the usage of the AFS Client Service if it is going to be 
used with the OpenAFS AFS Server:

(a) When the AFS Server is installed Freelance mode must be turned off.  

(b) The AFS Server and related tools only support the built in kaserver
(Kerberos IV).  If the AFS Server is being used, MIT Kerberos for Windows
should not be used.


12. The OpenAFS for Windows installers now include Symbol information which 
should be installed if you are experiencing problems and need to send crash 
reports.  This is true in both the release and the debug versions of the 
installers.  The differences between the release and debug versions are 
whether or not the binaries were compiled with optimization; whether the
debug symbols are installed by default; and whether additional debug 
statements were compiled into the binaries.


13. OpenAFS for Windows does not support files larger than 2GB.  This is
due to the lack of support for the Unicode version of the SMB/CIFS protocol.


14. Local RPC is used as the default RPC mechanism for setting 
tokens.  TCP RPC is required to be installed and is used for debugging 
and other functions.


15. The OpenAFS for Windows installer by default activates a weak form of 
encrypted data transfer between the AFS client and the AFS servers.  This
is often referred to as "fcrypt" mode.


16. OpenAFS 1.3.71 adds support for authenticated SMB connections using 
either NTLM or GSS SPNEGO (NTLM, Kerberos 5, ...).  In previous versions
of OpenAFS the SMB connections were unauthenticated which left open the
door for several security holes which could be used to obtain access to
other user's tokens on shared machines.  With the introduction of
authenticated SMB connections the so called High Security mode should
no longer be used.  

When GSS SPNEGO results in a Kerberos 5 authentication, the Windows SMB
client will attempt to retrieve service tickets for "cifs/afs@REALM" (if 
the loopback adapter is in use) or "cifs/machine-afs@REALM" (if the loopback
adapter is not being used).  It is extremely important that this service 
principal not exist in the KDC database.   If the request for this ticket
fails, a subsequent request for "cifs/HOST$@REALM" will be issued.  This 
service principal should exist in the KDC database.  The key associated 
with this service principal must match the key assigned to 
"host/machine@REALM".  If the local machine is part of a Windows Domain
this will all be taken care of for you.  If the local machine is using
a non-MS KDC for authentication, then your KDC administrator will have to
add these service principals to the list of principals to be maintained
for each host.


17. As of 1.3.70, INI files are no longer used for the storage of AFS 
configuration data.  No longer are there any AFS related files stored in the
%WINDIR% directory.  The CellServDB file is no longer called "afsdsbmt.ini"
and it is stored in the OpenAFS\Client directory.  The afs_freelance.ini
and afsdsbmt.ini file data has been moved to the registry.  

IMPORTANT: while the CellServDB file location and freelance mountpoint
data will be automatically migrated; there is no mechanism for automatic
migration of Submounts, Drive Mappings, Active Maps, and CSCPolicy data.


18. As of 1.3.70, the OpenAFS Client is compatible with Windows XP SP2
and Windows 2003 SP1.  The Internet Connection Firewall will be 
automatically adjusted to allow the receipt of incoming callback messages 
from the AFS file server.  In addition, the appropriate Back Connection 
entries are added to the registry to allow SMB authentication to be 
performed across the loopback connection.


19. As of 1.3.70, the OpenAFS Client Service supports the CIFS Remote
Admin Protocol which provides browsing of server and share information.
This significantly enhances the interoperability of AFS volumes within the
Explorer Shell and Microsoft Office applications.


20. OpenAFS will now automatically forget a user's tokens upon Logoff
unless the user's profile was loaded from an AFS volume.  In this situation
there is no mechanism to determine when the profile has been successfully
written back to the network.  It is therefore unsafe to release the user's
tokens.  Whether or not the profile has been loaded from the registry can
be determined for Local Accounts, Active Directory accounts and NT4 
accounts.

If there is a need to disable this functionality, the LogoffPreserveTokens
registry value (see registry.txt) can be used.
                                                   

21. Terminal Server installations.
When installing the NSIS (.exe) installer under Terminal Server, you must 
execute it from within the Add/Remove Programs Control Panel.  Failure to 
do so will result in AFS not running properly.  The AFS Server should not 
be installed on a machine with Terminal Server installed.


22. AFS is a Unix native file system.  As such the OpenAFS client attempts
to treat the files stored in AFS as they would be on Unix.  File and directory
names beginning with a "." are automatically given the Hidden attribute so
they will not normally be displayed.


23. Some organizations which have AFS cell names and Kerberos realm names
which differ by more then just lower and upper case rely on a modification
to krb524d which maps a Kerberos 5 ticket from realm FOO to a Kerberos 4
ticket in realm BAR.  This allows user@FOO to appear to be user@bar for
the purposes of accessing the AFS cell.  As of OpenAFS 1.2.8, support was
added to allow the immediate use of Kerberos 5 tickets as AFS (2b) tokens.
This is the first building block necessary to break away from the 
limitations of Kerberos 4 with AFS.  By using Kerberos 5 directly we
avoid the security holes inherent in Kerberos 4 cross-realm.  We also
gain access to cryptographically stronger algorithms for authentication
and encryption. 

Another reason for using Kerberos 5 directly is because the krb524 service
runs on a port (4444) which has become increasingly blocked by ISPs.  The
port was used to spread a worm which attacked Microsoft Windows in the 
summer of 2003.  When the port is blocked users find that they are unable
to authenticate.

Replacing the Kerberos 4 ticket with a Kerberos 5 ticket is a win in all
situations except when the cell name does not match the realm name and
the principal names placed into the ACLs are not the principal names from
the Kerberos 5 ticket.  To support this transition, OpenAFS for Windows
in 1.3.72 adds a new registry value to force the use of krb524d.  However,
the availability of this option should only be used by individuals until
such time as their organizations can provide a more permanent solution.


24. The Status Cache (AFS Config Control Panel: Advanced Page) is defined
to have a maximum number of entries.  Each entry represents a single file
or directory entry accessed within the AFS file system.  When the maximum
number of entries are allocated, entries will begin to be reused according
to a least recently used (LRU) algorithm.  If the number of files or 
directories being accessed repeatedly by your applications is greater then
the maximum number of entries, your host will begin to experience thrashing
of the Status Cache and all requests will result in network operations.

If you are experiencing poor performance you might want to increase the 
maximum number of Status Cache entries.  Each entry requires approximately
1.2K.  Note that the default number of Status Cache entries was increased
to 10,000 starting in 1.3.80.


25. "Netbios over TCP/IP" must be active on the machine in order for
communication with the AFS Client Service to succeed.  If "Netbios over
TCP/IP" is disabled on the machine, then communication with the AFS Client
Service will be impossible.


26. The AFS Client Service and related binaries are digitally signed by
"Secure Endpoints Inc." beginning with the 1.3.7400 release of OpenAFS
for Windows.  Starting in the 1.3.7500 release, the AFS Client Service
will perform a run-time verification check to ensure that all AFS related
DLLs loaded by the service match the same file version number and were
signed by the same entity.  This check has been added to prevent the
stability problems caused by more then one version of AFS being installed
on a machine at the same time.  Many hours of support time have been wasted
tracking down problems caused by the mixture of files from different 
releases.  

The registry.txt file documents the "VerifyServiceSignature" registry
value which can be used to disable the signature check.  The file version
check cannot be disabled.


27. The maximum cache size is approximately 1.3GB.  This is the largest
contiguous block of memory in the 2GB process address space which can be
used for the memory mapped file.  Due to fragmentation of the process 
spaced caused by the digital signature verification code, any attempt to
specify a cache size greater then 700MB will result in the automatic
disabling of the signature check.


28. OpenAFS for Windows implements an SMB server which is used as a
gateway to the AFS filesystem.  Because of the use of SMB, Windows 
stores all files into AFS using the OEM code pages such as CP437 (United 
States) or CP850 (Western Europe).  These code pages are incompatible 
with the ISO Latin-1 character set typically used as a default on Unix
systems in both the United States and Western Europe.  Filenames stored
by OpenAFS for Windows are therefore unreadable on Unix systems if they
include any of the following characters:

     [Ç]  128  08/00  200  80  C cedilla
     [ü]  129  08/01  201  81  u diaeresis
     [é]  130  08/02  202  82  e acute
     [â]  131  08/03  203  83  a circumflex
     [ä]  132  08/04  204  84  a diaeresis
     [à]  133  08/05  205  85  a grave
     [å]  134  08/06  206  86  a ring
     [ç]  135  08/07  207  87  c cedilla
     [ê]  136  08/08  210  88  e circumflex
     [ë]  137  08/09  211  89  e diaeresis
     [è]  138  08/10  212  8A  e grave
     [ï]  139  08/11  213  8B  i diaeresis
     [î]  140  08/12  214  8C  i circumflex
     [ì]  141  08/13  215  8D  i grave
     [Ä]  142  08/14  216  8E  A diaeresis
     [Å]  143  08/15  217  8F  A ring
     [É]  144  09/00  220  90  E acute
     [æ]  145  09/01  221  91  ae diphthong
     [Æ]  146  09/02  222  92  AE diphthong
     [ô]  147  09/03  223  93  o circumflex
     [ö]  148  09/04  224  94  o diaeresis
     [ò]  149  09/05  225  95  o grave
     [û]  150  09/06  226  96  u circumflex
     [ù]  151  09/07  227  97  u grave
     [ÿ]  152  09/08  230  98  y diaeresis
     [Ö]  153  09/09  231  99  O diaeresis
     [Ü]  154  09/10  232  9A  U diaeresis
     [ø]  155  09/11  233  9B  o slash
     [£]  156  09/12  234  9C  Pound sterling sign
     [Ø]  157  09/13  235  9D  O slash
     [×]  158  09/14  236  9E  Multiplication sign
     [ƒ]  159  09/15  237  9F  Florin sign

As of 1.3.75, a new registry value, HKLM\SOFTWARE\OpenAFS\Client 
"StoreAnsiFilenames" can be set to instruct OpenAFS for Windows to store 
filenames using the ANSI Code Page instead of the OEM Code Page.  The ANSI
Code Page is a compatible superset of Latin-1.  This setting is not the 
default setting because making this change would prevent OpenAFS for Windows 
from being able to access filenames containing the above characters which
were created without this setting.


29. There is a known issue with storing Windows Roaming Profiles when
the profile contains either directories or files with names which cannot
be represented in the local OEM character set.  In this case, attempts
to write the profile back to AFS will fail.  OpenAFS for Windows does
not currently support UNICODE.  To avoid this problem some sites run
logoff scripts (assigned by group policy) which rename all files to use
only the supported characters for the locale.


30. As of 1.3.80 the AFS Cache file is stored by default at %TEMP%\AFSCache
in a persistent file marked with the Hidden and System attributes.  The 
persistent nature of the data stored in the cache file improves the 
performance of OpenAFS by reducing the number of times data must be read
from the AFS file servers.


31. Integrated Login (as of 1.3.80) supports the ability to obtain tokens
for multiple cells.  See the "TheseCells" value in registry.txt.


32. New command line tool:

    afsdacl : Set or reset the DACL to allow starting or stopping
         the afsd service by any ordinary user.

    Usage : afsdacl [-set | -reset] [-show]
          -set   : Sets the DACL
          -reset : Reset the DACL
          -show  : Show current DACL (SDSF)

33. As of 1.3.80, the default @sys name list has been changed to 
"x86_win32 i386_w2k i386_nt40" for 32-bit x86 systems.  The default 
for itanium will be "ia64_win64" and "amd64_win64" for amd 64-bit 
processors.


34. As of 1.3.80, symlinks to \\AFS[\all]\... will now be treated
the same as symlinks to /afs/...  However, please use /afs/... as
the Windows UNC form will not work on Unix.


35. As of 1.3.80, OpenAFS for Windows implements the Cache Manager
Debugging RPC Interface.  The CM debugger can be queried with 
cmdebug.exe.

Usage: cmdebug -servers <server machine> [-port <IP port>] [-long]
               [-addrs] [-cache] [-help]
Where: -long   print all info
       -addrs  print only host interfaces
       -cache  print only cache configuration


36.  If you are a site which utilizes MIT/Heimdal Kerberos principals
to logon to Windows via a cross-realm relationship with a multi-domain
Windows forest, you must enable Windows logon caching unless the 
workstation is Longhorn Beta 1 or later.


37. VLDB and File Server Preferences can now be provided initial 
values using registry keys.  This is useful for managed machines in a
Windows domain which are centrally located (e.g., in a computing
lab.)  See registry.txt for details on the "Server Preferences" keys.


38. As of 1.3.81, timestamps on files stored in AFS are reported to 
Windows in UTC all year round.  Previously, in locales with daylight
savings time, the time reported by AFS to Windows when DST is active
was UTC+1.  This was done to preserve the relative local time for the
user.  A file stored at 11:00am EST in January would be reported as
having been stored at 11:00am EDT in June.  Unfortunately, this has
the negative side effect of changing the reported timestamp from 16:00UTC
to 15:00UTC.  Since Windows treats all file times in UTC, data 
synchronization applications which rely on the timestamp would believe
that all files stored in AFS had changed.  This will no longer be the
case. 

It should be noted that Unix based operating systems (such as Solaris)
do not appear to report file times to applications in UTC.  They do 
preserve the relative local time.  This may confuse some users who are
used to being able to compare the timestamp in an Unix shell with the
timestamp from the Windows explorer.  During DST, these two times will
no longer agree even though they are in fact describing the same time.


39. If the installer refuses to install and complains about an RPC
configuration error, check to ensure that the following registry
entries are present and that they refer to the dll "rpcrt4.dll":

   HKLM "SOFTWARE\Microsoft\RPC\ClientProtocols" "ncacn_np"
   HKLM "SOFTWARE\Microsoft\RPC\ClientProtocols" "ncacn_ip_tcp"
   HKLM "SOFTWARE\Microsoft\RPC\ClientProtocols" "ncadg_ip_udp"
   HKLM "SOFTWARE\Microsoft\RPC\ClientProtocols" "ncadg_ip_http"


40. 1.3.83 adds a new command, "fs minidump".  This command can 
be used at any time to generate a mini dump file containing the
current stack of the afsd_service.exe process.   This output can
be very helpful when debugging the AFS Client Service when it is
unresponsive to SMB/CIFS requests.


------------------------------------------------------------------------

How to Debug Problems with OpenAFS for Windows:

OpenAFS for Windows provides a wide range of tools to assist you in 
debugging problems.  The techniques available to you are varied because
of the wide range of issues that have been discovered over the years.

* pioctl debugging (IoctlDebug registry key)

  pioctl (path-based ioctl) calls are used by various tools to 
  communicate with the AFS Client Service.  Some of the operations performed
  include:

  - setting/querying tokens  (tokens.exe, aklog.exe, afscreds.exe)
  - setting/querying ACLs 
  - setting/querying cache parameters
  - flushing files or volumes
  - setting/querying server preferences
  - querying path location
  - checking the status of servers and volumes
  - setting/querying the sysname list

  pioctl calls are implemented by writing to a special UNC path that
  is processed by the AFS Client Service.   If there is a failure to 
  communicate with the AFS Client Service via SMB/CIFS, it will be 
  impossible to perform any of the above operations.   

  To assist in debugging these problems, the registry value:

        [HKLM\SOFTWARE\OpenAFS\Client]
        REG_DWORD:  IoctlDebug   = 0x01

  should be set.  Then any of the commands that perform pioctl calls should
  be executed from the command prompt.  With this key set the pioctl library
  will generate debugging output to stderr.  The output will contain the
  Win32 API calls executed along with their most important parameters and 
  their return code.   The MSDN Library and the Microsoft KnowledgeBase can
  be used as a reference to help you determine the configuration probem with
  your system.


* afsd_service initialization log (%WinDir%\TEMP\afsd_init.log)

  Every time the AFS Client Service starts it appends data about its progress
  and configuration to a file.  This file provides information crucial to
  determining why the service cannot start when there are problems.  When
  the process terminates due to a panic condition it will write to this 
  file the source code file and line number of the error.  In many cases 
  the panic condition is due to a misconfiguration of the machine.  In other
  cases it might be due to a programming error in the software.  
  A quick review of the location in the source code will quickly reveal 
  the reason for the termination.


* afsd_service debug logs (fs trace {-on, -off, -dump} -> 
  %WinDir%\TEMP\afsd.log)

  When attempting to debug the behavior of the SMB/CIFS Server and the
  Cache Manager it is often useful to examine a log of the operations
  being performed.  While running the AFS Client Service keeps an in memory
  log of many of its actions.   The default number of actions preserved
  at any one time is 5000.  This can be adjusted with the registry value:

    [HKLM\SYSTEM\CurrentControlSet\Services\TransarcAFSDaemon\Parameters]
    REG_DWORD  TraceBufferSize 

  A restart of the service is necessary when adjusting this value.   
  Execute "fs trace -on" to clear to the log and "fs trace -dump" to
  output the contents of the log to the file.


* Microsoft MiniDumps (fs minidump -> %WinDir%\TEMP\afsd.dmp)

  If the AFS Client Service become unresponsive to any form of communication
  there may be a serious error that can only be debugged by someone with 
  access to the source code and a debugger.   The "fs minidump" command can
  be used to force the generation of a MiniDump file containing the state
  of all of the threads in the AFS Client Service process.


* Integrated Logon debugging (TraceOption registry key)

  If you are having trouble with the Integrated Logon operations 
  it is often useful to be able to obtain a log of what it is attempting
  to do.   The registry value:

    [HKLM\SYSTEM\CurrentControlSet\Services\TransarcAFSDaemon\Parameters]
    REG_DWORD   TraceOption = 0x01

  will instruct the Integrated Logon Network Provider and Event Handlers
  to log information to the Windows Event Log: Application under the name
  "AFS Logon".


* RX (AFS RPC) debugging (rxdebug)

  The rxdebug.exe tool can be used to query a variety of information 
  about the AFS services installed on a given machine.  The port for
  the AFS Cache Manager is 7001.  


* Cache Manager debugging (cmdebug)

  The cmdebug.exe tool can be used to query the state of the AFS Cache
  Manager on a given machine.


* Persistent Cache consistency check

  The persistent cache is stored in a Hidden System file at 
  %WinDir%\TEMP\AFSCache.  If there is a problem with the persistent 
  cache that prevent the AFS Client Service from being able to start
  a validation check on the file can be performed.

    afsd_service.exe --validate-cache <cache-path>
  

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Reporting Bugs:

Bug reports should be sent to openafs-bugs@openafs.org.  Please include as 
much information as possible about the issue.  If you are reporting a crash, 
please install the debugging symbols by re-running the installer.  If a dump 
file is available for the problem, %WINDIR%\TEMP\afsd.dmp, include it along 
with the AFS Client Trace file  %WINDIR%\TEMP\afsd.log.  The AFS Client 
startup log is %WINDIR%\TEMP\afsd_init.log.  Send the last continuous block 
of log information from this file.

Configuring DrWatson to generate dump files for crashes:

 * Run drwtsn32.exe to configure or to identify where the log and the crash dump 
   files are created: 
   - click Start > Run...  
   - type drwtsn32 <enter>. 
   - Select either a Crash Dump Type: Mini or Full. 
   - Clear Dump Symbol Table
   - Clear Append to Existing Log file. 
   - Check Dump All Thread Contexts.
   - Check Create Crash Dump File
 * Next run the monitoring module of Dr. Watson: 
   - click Start > Run...
   - type drwatson <enter>. 
   - Once a crash happens, Dr. Watson generates a dump file and a report in the 
     log file, including the address of the crash and the stack dump.

Once you have the Dr. Watson's logfile and minidump, zip them and send them as
attachments with your e-mail to openafs-bugs@openafs.org.

When reporting a error, please be sure to include the version of OpenAFS.


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How to Contribute to the Development of OpenAFS for Windows:

Contributions to the development of OpenAFS for Windows are needed. 
Contributions may take many forms including cash donations, support contracts, 
donated developer time, and even donated tech writer time.

If you wish to be involved in OpenAFS for Windows development please join the 
openafs-win32-devel@openafs.org mailing list.

  https://lists.openafs.org/mailman/listinfo/openafs-win32-devel

User questions should be sent to the openafs-info@openafs.org mailing list.  

  https://lists.openafs.org/mailman/listinfo/openafs-info

You must join the mailing lists if you wish to post to the list without 
incurring a moderation delay.