openafs/doc/txt/winnotes/afs-issues.txt

This file is a rough list of known issues with the 1.3.63 release of OpenAFS
on Windows.  This list is not complete.  There are probably other issues 
which can be found in the RT database or on the mailing list.


(1) File/Directory access is not integrated with windows security 

(2) tokens are assigned to the service on a system global basis.  Therefore, 
all users and processes on the machine are able to access files with the 
list of available tokens.  This is dangerous if anonymous logins are enabled;
or if multiple users are on the machine (ie, Terminal Server or XP user 
switching)

(3) SMB LANA list is static.  

(3a) IP address changes cause the service to terminate due to an assertion 
in smb_Listener() thread.

(3b) New IP addresses do not get bound

(3c) Loopback adapter hack:
  (i)   prevents use of AFS Gateway 
  (ii)  requires installation of loopback adapter
  (iii) the list of hack adapters is incomplete (VMWare, MS TV/Video, ...)
  (iv)  incompatible with Windows 2000 and earlier

(4) Performance of the AFS Client Service code simply sucks.  The average 
read, write, and delete times for AFS are more than ten times slower than 
the equivalent Windows File Share operations.  The Window File Share operations 
are not all that fast.  It has been claimed that the Windows AFS functions are
one hundred times slower than the equivalent operations on Linux.  I would not 
be at all surprised.  The best we can do without rewriting AFS as a IFS would
be to match the Windows File Share performance.  I believe the threading model
is imposing significant delays in the movement of data from between the SMB 
and RX protocol operations. There was also an issue with large numbers of 
page faults which have since been fixed.

(5) The AFS SMB code logs numerous 1002 events each day.  This is caused 
when an invalid SMB message are being processed from within the client.  
It is unclear if the invalid SMB message has been received or is being sent.

(6) The AFS client service causes MRxSMB to produce 3019 events.  This is probably 
the result of either malformed messages or invalid LANA values being used.

(7) There appear to be directory locking problems associated with renaming 
directories.

(8) File termination differences between Win9x and nt/w2k/xp (Jim Peterson)

(9) How to silence "Explorer" when the mapped drive is not available?

(10) Convert to IFS!!!!!!

(11) Kerberos 5 integration:
(11f) allow arbitrary cell to realm mappings
(11g) modify UI to allow user to choose whether to authenticate
      using Kerberos or AFS 
(11h) modify UI to allow user to select an existing principal to
      be used to request AFS tokens
(11i) modify UI to display Kerberos 5 ticket info (principal, 
      ticket lifetimes, etc) 

(12) Default cell is system global just like everything else.  Different
     users logging in via Integrated Logon or using afscreds.exe cannot
     be automatically prompted for different cells

(13) AFS Integrated Logon:
(13a) Obtain tokens via Kerberos 5
(13b) If using Kerberos, need to figure out a means of passing credentials
      into the user space until such time as I finish the new credential
      cache service.
(13c) If network is not available must store the username and password 
      somewhere until such time as the network starts.

(14) Loopback adapter is not always installed with bindings to "File and 
     Printer Sharing for Microsoft Networks" or "Client for Microsoft 
     Networks".   If these are not bound then SMB names will successfully
     be published to a list of zero which causes the AFS not to function.
     We need a way to test whether the Loopback adapter is properly bound
     so we know if it is safe to use.  Actually, it is worse.  Even with
     the bindings on Win2000 the loopback adapter frequently fails to publish
     SMB names.  Of course, the error messages report nothing.

(15) If a drive mapping is "in use", then afscreds cannot be used to Modify
     or Delete the Mapping.  If a map to "H:" to \afs\cell\foo" with 
     description "home" is modified to point to \afs\cell\bar, then the 
     description must be unique.  "home" cannot be reused.  We need a way 
     to remove "home" from the submount list.  

(16) WinAFS configuration values are still stored in old style INI files 
     instead of using the Registry.  This is especially important for
     per-user values such as drive mappings

(17) Drive mappings are lost on WinXP after return from Standby.  (This could
     be because the AFS Client Service fails OR because the RX protocol is
     temporarily unable to access the Cell due to network restore timing
     issues.)

(18) No support for Unicode filenames.  Translations make file unreadable

(19) No auto-restart on service failure

(20) Better EventLog handling

(21) Named Pipes Support

(22) Memory Mapped File support

(23) Large file support

(24) Execution of debug builds indicates corruption of run time library 
     allocated memory blocks due to buffer overruns.  This may be the 
     result of improper object locking or out of bounds access.

(25) AFS Shell Extensions do not work on UNC paths of the form \\AFS\...
     They only work on mapped drives.

(26) Implement persistent disk based cache which survives restarts

(27) NSIS Installer issues
     (a) integration with KFW install script
     (b) Optional removal of AFS Server volumes

(28) The User Interface needs to be re-designed to separate the per-user
     and per-machine settings.  All of the new registry items need to 
     be added to the UI

(29) Windows XP SP2 and Windows 2003 SP1 are going to lockdown the 
     machine.  We need to add code to programatically open the 
     Internet Connection Firewall to the ports needed by the various
     AFS services.

(30) It has been discovered that there is a lack of proper thread locking
     when "crypt" mode is used on Windows.  This can be reproduced by
     performing multiple read operations simultaneous.  The symptoms will
     be a memory followed by an eventual crash resulting from a stack 
     overwrite.  First step is to enable the use of RX_ENABLE_LOCKS when
     building on Windows.

(31) There are remaining issues with the Freelance support.  There appears
     to be an initialization issue related to whether the Freelance fake
     root.afs is constructed before or after the first access to a cell 
     name via \\afs\cellname\.  Accessing \\afs\cellname via cmd.exe 
     appears to trigger the problem on a regular basis whereas 4nt.exe
     does not.