Patch Name: PHKL_18913

Patch Description: s700 10.20 Correct VxFS fsadm resize problems

Creation Date: 99/06/18

Post Date:  99/06/22

Hardware Platforms - OS Releases:
	s700: 10.20

Products: N/A

Filesets:
	JournalFS.VXFS-BASE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_18913: PANIC
	PHKL_9940: CORRUPTION

Path Name: /hp-ux_patches/s700/10.X/PHKL_18913

Symptoms:
	PHKL_18913:
	( SR: 1653304642 CR: JAGab17264 )
	When trying to use the OnLine JFS fsadm resize
	capability to resize a Vxfs Version 2 file system,
	the system may panic with a data page fault in function
	vx_resize_mapupd().

	PHKL_9940:
	When trying to use the OnLine JFS fsadm resize capability
	to grow a file system greater than 2Gb, the fsadm command
	will fail with an errno of 28, and the file system will
	report I/O errors on any attempted access. The file system
	becomes unusable at this point.

Defect Description:
	PHKL_18913:
	( SR: 1653304642 CR: JAGab17264 )
	When trying to resize a VxFS Version 2 file system, the new
	number of allocation units needed by the file system was
	calculated incorrectly for VxFS version 2 file systems.
	Resolution:
	The calculation for the number of allocation units needed
	when resizing a VxFS file system was corrected to apply to
	both Version 2 and Version 3 file systems.

	PHKL_9940:
	The problem can be reproduced by executing the following:

	- create a 4Gb volume, and newfs a VxFS file system on it
	- mount this file system
	- run lvextend to extend the volume to 6Gb
	- run VxFS fsadm command to try to grow the fs to 6Gb

	This fsadm command will fail. Two resize bugs were uncovered
	with this problem. The first was in vx_resize_sumcalc()
	which calculates the new values for the fs_efree array; the
	code was only copying VX_SNEFREE entries (16) so higher
	entries from the multiple allocation unit summaries were not
	getting copied into the file system summary. The other was
	that two emap inodes wound up with different layouts caused
	by an extending allocation; the code in vx_resize_icopy()
	failed to take the extent offset (returned from the bmap
	call) into account.

SR:
	1653304642 5003352096

Patch Files:
	/usr/conf/lib/libvxfs_base.a(vx_resize.o)

what(1) Output:
	/usr/conf/lib/libvxfs_base.a(vx_resize.o):
		vx_resize.c $Date: 99/06/18 08:13:10 $ $Revision: 1.
			5.98.10 $ PATCH_10.20 (PHKL_18913)

cksum(1) Output:
	1193412150 16240 /usr/conf/lib/libvxfs_base.a(vx_resize.o)

Patch Conflicts: None

Patch Dependencies: None

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_9940

Equivalent Patches:
	PHKL_18914:
	s800: 10.20

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_18913

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

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_18913.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_18913.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_18913.  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_18913.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_18913.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions: None