Patch Name: PHKL_18670

Patch Description: s700 10.20 VxFS typed bmap patch

Creation Date: 99/05/25

Post Date:  99/05/27

Hardware Platforms - OS Releases:
	s700: 10.20

Products: N/A

Filesets:
	JournalFS.VXFS-BASE-KRN

Automatic Reboot?: Yes

Status: General Release

Critical:
	Yes
	PHKL_18670: CORRUPTION
	PHKL_18026: PANIC

Path Name: /hp-ux_patches/s700/10.X/PHKL_18670

Symptoms:
	PHKL_18670:
	A VxFS filesystem may become corrupted after upgrading
	from version 2 (V2) layout to V3/V4 layout.

	PHKL_18026:
	( SR: 4701411561  CR: JAGaa46204 )
	The following data page fault panic occurs when using a VxFS
	filesystem and a certain type of inode corruption is
	encountered:
	  trap type 15, pcsq.pcoq = 0.2b7de4, isr.ior = 0.8
	  panic: (display==0xb800, flags==0x0) Data page fault
	The top of the stack trace looks like:
	  panic+0x10 report_trap_or_int_and_panic+0xe8 trap+0xf84
	  $RDB_trap_patch+0x20 vx_trunc_typed+0x154
	  vx_trunc_typed+0x260 vx_trunc_typed+0x260
	  vx_trunc+0xc6c vx_inactive_remove+0x16c
	  vx_inactive_now+0x2b0 vx_inactive+0x150
	  [...]

Defect Description:
	PHKL_18670:
	When an inode ilist extent map grows beyond 2GB, it is
	converted from type ext4 to typed.  If the inode contains
	indirect block pointers from a V2 VxFS layout, the inode
	will be corrupted.

	Resolution:
	If an attempt is made to make this conversion, return
	an error and do not corrupt the filesystem.

	PHKL_18026:
	( SR: 4701411561  CR: JAGaa46204 )
	An inode with a corrupted extent map could cause the system
	to panic.

	Resolution:
	When this corruption is detected, the inode is marked bad
	and an error is returned.  This patch does not fix the cause
	of the corruption, which could be a faulty disk drive for
	instance, it only disables the inode to avoid a panic.

SR:
	4701411561 4701421388

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

what(1) Output:
	/usr/conf/lib/libvxfs_base.a(vx_bmaptyped.o):
		vx_bmaptyped.c $Date: 99/05/24 13:29:14 $ $Revision:
			 1.2.98.21 $ PATCH_10.20 (PHKL_18670)

cksum(1) Output:
	1554187759 18512 /usr/conf/lib/
		libvxfs_base.a(vx_bmaptyped.o)

Patch Conflicts: None

Patch Dependencies:
	s700: 10.20: PHKL_16750

Hardware Dependencies: None

Other Dependencies: None

Supersedes:
	PHKL_18026

Equivalent Patches:
	PHKL_18671:
	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_18670

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

		swinstall -x autoreboot=true -x match_target=true \
			-s /tmp/PHKL_18670.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_18670.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_18670.  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_18670.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_18670.depot of=/dev/rmt/0m bs=2k

Special Installation Instructions:
	This patch depends on base patch PHKL_16750.  For successful
	installation, please ensure that PHKL_16750 is in the same
	depot with this one or already installed.