Patch Name: PHKL_12059

Patch Description: s700 10.20 HFS cumulative patch

Creation Date: 97/08/06

Post Date:  97/08/11

Hardware Platforms - OS Releases:
	s700: 10.20

Products: N/A

Filesets:
	OS-Core.CORE-KRN

Automatic Reboot?: Yes

Status: General Superseded

Critical:
	Yes
	PHKL_12059: HANG

Path Name: /hp-ux_patches/s700/10.X/PHKL_12059

Symptoms:
	PHKL_12059:
	UFS hangs with heavy use of a filesystem branch by multiple
	processes. The hang is due to a three way deadlock with
	inodes and bufs being held but not released. This shows
	up with the buf being both B_BUSY and B_DONE but not being
	released.

	PHKL_8463:
	The directory entry for an HFS file system object (FSO) is
	still readable even after the contents of that object have
	been deleted.  This is a roadblock to C2 Security
	certification.

Defect Description:
	PHKL_12059:
	Problem was due to incorrectly releasing an inode while
	still holding a buf. This violates the rule which would
	prevent a deadlock from happening. The problem shows up
	as a three way deadlock with two processes marching back
	to the root from the leaves via ".." and another process
	marching from the root to the leaves. This creates a
	a deadlock of processes waiting for the same inode and
	holding the wanted buf at the same time.

	PHKL_8463:
	The name of a file in an HFS directory entry is not cleared
	when the file object itself is deleted (say, with rm(1)).
	To demonstrate this:

	$ mkdir test
	$ cd test
	$ touch delete_me
	$ ls
	delete_me
	$ rm delete_me
	$ ll
	total 0
	$ strings .         # Examine strings in cwd.
	      delete_me     # Filename is still in cwd entry.

	The same defect exists in the journaled file system (VxFS);
	this fix does not address that defect.

SR:
	1653182501 4701334839

Patch Files:
	/usr/conf/lib/libufs.a(ufs_dir.o)

what(1) Output:
	/usr/conf/lib/libufs.a(ufs_dir.o):
		ufs_dir.c      $Date: 97/08/06 15:54:38 $ $Revision:
			 1.22.98.9 $ PATCH_10.20 (PHKL_12059)

cksum(1) Output:
	1726099162 19896 /usr/conf/lib/libufs.a(ufs_dir.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_8463

Equivalent Patches:
	PHKL_12060:
	s800: 10.20

	PHKL_12061:
	s700: 10.10

	PHKL_12062:
	s800: 10.10

Patch Package Size: 80 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.
	------------------------------------------------------------
	1. Back up your system before installing a patch.

	2. Login as root.

	3. Copy the patch to the /tmp directory.

	4. Move to the /tmp directory and unshar the patch:

		cd /tmp
		sh PHKL_12059

	5a. For a standalone system, run swinstall to install the
	    patch:

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_12059.depot

	5b. For a homogeneous NFS Diskless cluster run swcluster on the
	    server to install the patch on the server and the clients:

		swcluster -i -b

	    This will invoke swcluster in the interactive mode and
	    force all clients to be shut down.

	    WARNING: All cluster clients must be shut down prior to the
		     patch installation.  Installing the patch while the
		     clients are booted is unsupported and can lead to
		     serious problems.

	    The swcluster command will invoke an swinstall session in which
	    you must specify:

		alternate root path  -  default is /export/shared_root/OS_700
		source depot path    -  /tmp/PHKL_12059.depot

	    To complete the installation, select the patch by choosing
	    "Actions -> Match What Target Has" and then "Actions -> Install"
	    from the Menubar.

	5c. For a heterogeneous NFS Diskless cluster:

		- run swinstall on the server as in step 5a to install
		  the patch on the cluster server.

		- run swcluster on the server as in step 5b to install
		  the patch on the cluster clients.

	By default swinstall will archive the original software in
	/var/adm/sw/patch/PHKL_12059.  If you do not wish to retain a
	copy of the original software, you can create an empty file
	named /var/adm/sw/patch/PATCH_NOSAVE.

	Warning: If this file exists when a patch is installed, the
	         patch cannot be deinstalled.  Please be careful
		 when using this feature.

	It is recommended that you move the PHKL_12059.text file to
	/var/adm/sw/patch for future reference.

	To put this patch on a magnetic tape and install from the
	tape drive, use the command:

		dd if=/tmp/PHKL_12059.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None