bionic (8) scsi_logging_level.8.gz

Provided by: sg3-utils_1.42-2ubuntu1.18.04.2_amd64 bug

NAME
       scsi_logging_level - access Linux SCSI logging level information


SYNOPSIS
       scsi_logging_level    [--all=LEV]    [--create]    [--error=LEV]   [--get]   [--help]   [--highlevel=LEV]
       [--hlcomplete=LEV]  [--hlqueue=LEV]  [--ioctl=LEV]  [--llcomplete=LEV]  [--llqueue=LEV]  [--lowlevel=LEV]
       [--midlevel=LEV] [--mlcomplete=LEV] [--mlqueue=LEV] [--scan=LEV] [--set] [--timeout=LEV] [--version]


DESCRIPTION
       This  bash  shell script accesses the Linux SCSI subsystem logging level. The current values can be shown
       (e.g. with --get) or changed (e.g. with --set). Superuser permissions will typically be required  to  set
       the logging level.

       One of these options: --create, --get or --set is required. Only one of them can be given.


OPTIONS
       Arguments to long options are mandatory for short options as well.

       -a, --all=LEV
              LEV is used for all SCSI_LOG fields.

       -c, --create
              Options  are  parsed  and  placed  in internal fields that are displayed but no logging levels are
              changed within the Linux kernel.

       -E, --error=LEV
              LEV is placed in the SCSI_LOG_ERROR field.

       -g, --get
              Fetches the current SCSI logging levels from the Linux kernel and displays them.

       -h, --help
              print out the usage message then exit.

       -H, --highlevel=LEV
              LEV is placed in the SCSI_LOG_HLQUEUE and SCSI_LOG_HLCOMPLETE fields.

       --hlcomplete=LEV
              LEV is placed in the SCSI_LOG_HLCOMPLETE field.

       --hlqueue=LEV
              LEV is placed in the SCSI_LOG_HLQUEUE field.

       -I, --ioctl=LEV
              LEV is placed in the SCSI_LOG_IOCTL field.

       --llcomplete=LEV
              LEV is placed in the SCSI_LOG_LLCOMPLETE field.

       --llqueue=LEV
              LEV is placed in the SCSI_LOG_LLQUEUE field.

       -L, --lowlevel=LEV
              LEV is placed in the SCSI_LOG_LLQUEUE and SCSI_LOG_LLCOMPLETE fields.

       -M, --midlevel=LEV
              LEV is placed in the SCSI_LOG_MLQUEUE and SCSI_LOG_MLCOMPLETE fields.

       --mlcomplete=LEV
              LEV is placed in the SCSI_LOG_MLCOMPLETE field.

       --mlqueue=LEV
              LEV is placed in the SCSI_LOG_MLQUEUE field.

       -S, --scan=LEV
              LEV is placed in the SCSI_LOG_SCAN field.

       -s, --set
              Uses the fields specified in this command's options and attempts to apply them to the  Linux  SCSI
              subsystem logging levels. Typically superuser permissions will be required to do this.

       -T, --timeout=LEV
              LEV is placed in the SCSI_LOG_TIMEOUT field.

       -v, --version
              Outputs the version information and then exits.


NOTES
       The --get and --set options access the /proc/sys/dev/scsi/logging_level pseudo file.


EXIT STATUS
       The  exit status of this script is 0 when it is successful. Any other exit status indicates that an error
       has occurred.


EXAMPLES
       The following will set SCSI_LOG_ERROR to level 5 in the Linux kernel. It requires root permissions:

         scsi_logging_level -s -E 5

       So as to not interfere with other SCSI subsystem upper level drivers (ULDs) which  most  likely  will  be
       active  at  the  same  time,  the Linux sg driver uses SCSI_LOG_TIMEOUT for logging purposes. To see full
       debugging and trace from the sg driver use:

         scsi_logging_level -s -T 7

       The output from the sg driver caused by this will go to the system logs (e.g. /var/log/syslog). To reduce
       the amount of output use a number lower than 7. Using 0 will turn off the tracing and debug.


AUTHORS
       Written by IBM. Small alterations by Douglas Gilbert.


REPORTING BUGS
       Report bugs to <dgilbert at interlog dot com>.


       Copyright © IBM Corp. 2006
       This  software is distributed under the GPL version 2. There is NO warranty; not even for MERCHANTABILITY
       or FITNESS FOR A PARTICULAR PURPOSE.

       The software  was  obtained  from  an  IBM  package  called  s390-tools-1.6.2  found  on  that  company's
       "developerworks" site. The most recent version of that package at this time is 1.8.3 .