Patch Name:  PHKL_2856

Patch Description: s700 8.07 Fixes many iunlock and ufs_inactive panics

        Fixes many iunlock and ufs_inactive panics espescially with

                ifind failed: servestratread

        console messages.

This fixes iunlock panics, ufs_inactive panics, problems with
ifind failed: servestratread messages. It affects DUX servers only. All
of the other ifind calls in dux*.c probably should also be fixed. However,
this should take care of 95-99% of the current problems. There was a hole
using ifind(). Sample scenario: going thru servestratread, lock inode with
matching dev, i_number. This one happens to be on free list though. But
all ifind does is get it, then servestrat* ilocked it. Now other process
goes along through ufs code and grabs that "free" inode to use. He writes
over the flag word setting only REF bit. (This is all going thru iget()).
@From here on, there are many scenarios, but lets say the second guy finishes
and unlocks the inode, then the first guy (in servestratread) finishes
and unlocks the inode...Boom!

Path Name:  /hp-ux_patches/s700/8.X/PHKL_2856

Effective Date:  930715

Patch Files:  
/system/PHKL_2856/new/duxstrat.o

SR/APR#:  None

"what" string/timestamp:  
duxstrat.o:
         duxstrat.c $Revision: 1.8.77.3 $ $Date: 93/07/15 08:47:59 $PATCH_8.07
 (PHKL_2856)


"sum" output:  
33562 18 duxstrat.o


Dependencies:  None

Supersedes: None

Patch Package Size:  72 Kbytes

Installation Instructions:  

     Please review all instructions and the Hewlett-Packard
     SupportLine User Guide or your Hewlett-Packard support terms
     and conditions for precautions, scope of license,
     restrictions, and, limitation of liability and warranties,
     before installing this patch.

     Note: Please back up your system before you patch.

---------------------------------------------------------------------------
After getting the patch onto your machine, unshar the patch (sh PHKL_2856).

To install this patch do the following:
1) Run /etc/update (Note: you must be logged in as root to update
   a system).
2) Once in the update "Main Menu" move the highlighted line to "Change
   Source or Destination ->" and press "Return" or "Select Item".
3) Make sure the highlighted item in the "Change Source or Destination"
   window is "From Tape Device to Local System ...", then press "Return" or
   "Select Item".
4) You should now be in the "From Tape Device to Local System" window.
   Change the "Source:  /dev/rmt/0m" to "Source: /tmp/PHKL_2856.updt"
   (this assumes that you are in the /tmp directory where PHKL_2856.updt
   has been placed).  Note: You must enter the complete path name.
5) Press "Done".
6) From here on follow the standard directions for update.

The customized script that update runs will move the original software
to /system/PHKL_2856/orig.  HP recommends keeping this software there in
order to recover from any potential problems.  It is also recommended that
you move the PHKL_2856.text file to /system/PHKL_2856 to be retained for
future reference.

If you wish to put this patch on a magnetic tape and update from the tape
drive, dd a copy of the patch to the tape drive.  As an example the
following will create a copy of the patch that update can read:
dd if=PHKL_2856.updt of=/dev/rmt/0m bs=2048