Patch Name: PHKL_13093

Patch Description: s700 10.20 Fix for Advanced VxFS fsadm directory corruption

Creation Date: 97/11/04

Post Date:  97/11/18

Hardware Platforms - OS Releases:
	s700: 10.20

Products:
	HP OnLineJFS (Advanced VxFS) B.10.20

Filesets:
	AdvJournalFS.VXFS-ADV-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_13093: CORRUPTION

Path Name: /hp-ux_patches/s700/10.X/PHKL_13093

Symptoms:
	PHKL_13093:
	After running fsadm to reorganize a VxFS file system, the
	file system became corrupted with some subdirectories having
	a size of zero byte. Access these directories generated the
	following error message in syslog:

	vxfs: mesg 008: vx_direrr - /vxdir file system inode 4
	                                        block 0 error 22

	The file system was marked bad. A full fsck would fix the
	file system by removing the zero-byte directories, which
	should have been valid empty directories.

Defect Description:
	PHKL_13093:
	"fsadm -d" calls kernel routines to reorganize and
	compact directories by removing the free space. For
	directories having indirect extents, multiple directory
	blocks may be allocated in an extent. If all directory
	blocks are free within an extent, we will remove the whole
	extent. In some cases, the code may truncate the directory
	down to size zero because all the directory blocks are free
	in an extent. This causes the directory to become invalid.
	The fix is to make sure that when we are freeing an extent
	with multiple directory blocks, if freeing that extent
	would reduce the size of the directory to zero, we do not
	perform the truncation.

SR:
	4701371567

Patch Files:
	/usr/conf/lib/libvxfs_adv.a(vx_dirsort.o)

what(1) Output:
	/usr/conf/lib/libvxfs_adv.a(vx_dirsort.o):
		vx_dirsort.c $Date: 97/11/04 11:27:05 $ $Revision: 1
			.5.98.6 $ PATCH_10.20 (PHKL_13093)

cksum(1) Output:
	4098517351 8132 /usr/conf/lib/libvxfs_adv.a(vx_dirsort.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes: None

Equivalent Patches:
	PHKL_13094:
	s800: 10.20

Patch Package Size: 60 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_13093

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

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_13093.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_13093.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_13093.  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_13093.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_13093.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None