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Steffen Maier 5d4a3d0a2f scsi: zfcp: trace high part of "new" 64 bit SCSI LUN Complements debugging aspects of the otherwise functionally complete v3.17 commit `9cb78c16f5` ("scsi: use 64-bit LUNs"). While I don't have access to a target exporting 3 or 4 level LUNs, I did test it by explicitly attaching a non-existent fake 4 level LUN by means of zfcp sysfs attribute "unit_add". In order to see corresponding trace records of otherwise successful events, we had to increase the trace level of area SCSI and HBA to 6. $ echo 6 > /sys/kernel/debug/s390dbf/zfcp_0.0.1880_scsi/level $ echo 6 > /sys/kernel/debug/s390dbf/zfcp_0.0.1880_hba/level $ echo 0x4011402240334044 > \ /sys/bus/ccw/drivers/zfcp/0.0.1880/0x50050763031bd327/unit_add Example output formatted by an updated zfcpdbf from the s390-tools package interspersed with kernel messages at scsi_logging_level=4605: Timestamp : ... Area : REC Subarea : 00 Level : 1 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : scsla_1 LUN : 0x4011402240334044 WWPN : 0x50050763031bd327 D_ID : 0x00...... Adapter status : 0x5400050b Port status : 0x54000001 LUN status : 0x41000000 Ready count : 0x00000001 Running count : 0x00000000 ERP want : 0x01 ERP need : 0x01 scsi 2:0:0:4630896905707208721: scsi scan: INQUIRY pass 1 length 36 scsi 2:0:0:4630896905707208721: scsi scan: INQUIRY successful with code 0x0 Timestamp : ... Area : HBA Subarea : 00 Level : 6 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : fs_norm Request ID : 0x<inquiry2-req-id> Request status : 0x00000010 FSF cmnd : 0x00000001 FSF sequence no: 0x... FSF issued : ... FSF stat : 0x00000000 FSF stat qual : 00000000 00000000 00000000 00000000 Prot stat : 0x00000001 Prot stat qual : ........ ........ 00000000 00000000 Port handle : 0x... LUN handle : 0x... \| Timestamp : ... Area : SCSI Subarea : 00 Level : 6 Exception : - CPU ID : .. Caller : 0x... Record ID : 1 Tag : rsl_nor Request ID : 0x<inquiry2-req-id> SCSI ID : 0x00000000 SCSI LUN : 0x40224011 SCSI LUN high : 0x40444033 <======================= SCSI result : 0x00000000 SCSI retries : 0x00 SCSI allowed : 0x03 SCSI scribble : 0x<inquiry2-req-id> SCSI opcode : 12000000 a4000000 00000000 00000000 FCP rsp inf cod: 0x00 FCP rsp IU : 00000000 00000000 00000000 00000000 00000000 00000000 scsi 2:0:0:4630896905707208721: scsi scan: INQUIRY pass 2 length 164 scsi 2:0:0:4630896905707208721: scsi scan: INQUIRY successful with code 0x0 scsi 2:0:0:4630896905707208721: scsi scan: peripheral device type of 31, \ no device added Signed-off-by: Steffen Maier <maier@linux.vnet.ibm.com> Fixes: `9cb78c16f5` ("scsi: use 64-bit LUNs") Cc: <stable@vger.kernel.org> #3.17+ Reviewed-by: Benjamin Block <bblock@linux.vnet.ibm.com> Reviewed-by: Jens Remus <jremus@linux.vnet.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.vnet.ibm.com> Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>		2017-08-10 19:36:58 -04:00
arch	Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus	2017-08-06 11:52:01 -07:00
block	blk-mq: map queues to all present CPUs	2017-07-24 10:01:31 -06:00
certs	modsign: add markers to endif-statements in certs/Makefile	2017-07-14 11:01:37 +10:00
crypto	crypto: authencesn - Fix digest_null crash	2017-07-18 17:01:11 +08:00
Documentation	media fixes for v4.13-rc2	2017-08-05 14:09:26 -07:00
drivers	scsi: zfcp: trace high part of "new" 64 bit SCSI LUN	2017-08-10 19:36:58 -04:00
firmware	firmware/Makefile: force recompilation if makefile changes	2017-05-08 17:15:10 -07:00
fs	A large number of ext4 bug fixes and cleanups for v4.13	2017-08-06 12:31:17 -07:00
include	scsi: fc: start decoupling fc_block_scsi_eh from scsi_cmnd	2017-08-07 14:04:02 -04:00
init	random: do not ignore early device randomness	2017-07-12 16:26:00 -07:00
ipc	ipc: add missing container_of()s for randstruct	2017-08-02 17:16:12 -07:00
kernel	Fix compat_sys_sigpending breakage	2017-08-06 11:48:27 -07:00
lib	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-07-31 22:36:42 -07:00
mm	mm: take memory hotplug lock within numa_zonelist_order_handler()	2017-08-02 17:16:11 -07:00
net	A bunch of fixes and follow-ups for -rc1 Luminous patches: issues with	2017-08-04 10:15:11 -07:00
samples	samples/bpf: fix bpf tunnel cleanup	2017-07-31 22:02:47 -07:00
scripts	DeviceTree fixes for 4.13:	2017-07-28 17:21:41 -07:00
security	Now that IPC and other changes have landed, enable manual markings for	2017-07-19 08:55:18 -07:00
sound	ASoC: Fixes for v4.13	2017-08-02 17:11:45 +02:00
tools	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2017-07-31 22:36:42 -07:00
usr	ramfs: clarify help text that compression applies to ramfs as well as legacy ramdisk.	2017-07-06 16:24:30 -07:00
virt	KVM/ARM Fixes for v4.13-rc4	2017-08-03 17:59:58 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	kbuild: Add support to generate LLVM assembly files	2017-04-25 08:13:52 +09:00
.mailmap	power supply and reset changes for the v4.12 series (part 2)	2017-05-12 12:02:21 -07:00
COPYING
CREDITS	avr32: remove support for AVR32 architecture	2017-05-01 09:27:15 +02:00
Kbuild	kbuild: Consolidate header generation from ASM offset information	2017-04-13 05:43:37 +09:00
Kconfig
MAINTAINERS	MAINTAINERS: Add myself to S390 ZFCP DRIVER as a co-maintainer	2017-08-07 14:04:03 -04:00
Makefile	Linux 4.13-rc4	2017-08-06 18:44:49 -07:00
README	README: add a new README file, pointing to the Documentation/	2016-10-24 08:12:35 -02:00

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.