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lszfcp: save a stat syscall on the SCSI device loop hot path

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Just go ahead and read the sysfs attribute directly as the syscalls are
needed anyway.
If necessary stderr could be redirected to /dev/null in the future,
but there was no case so far where the attribute did not exist.

This does not make a runtime difference when running on sysfs. Change it
anyway to avoid somebody searching for speed improvement options stumbling
over it again.

Reviewed-by: Benjamin Block <bblock@linux.ibm.com>
Signed-off-by: Steffen Maier <maier@linux.ibm.com>
Signed-off-by: Steffen Eiden <seiden@linux.ibm.com>
This commit is contained in:
Steffen Maier
2022-12-03 00:05:11 +01:00
committed by Steffen Eiden
parent a4f4337060
commit d4316c155c
1 changed files with 1 additions and 2 deletions
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zconf/lszfcp
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@@ -415,8 +415,7 @@ show_devices()
SDEVMARKER=""
if $SHOW_EXTENDED; then
[ -d $ZFCP_UNIT_PATH ] || SDEVMARKER="$SDEVMARKER auto"
[ -r $SCSI_DEVICE_PATH/state ] \
&& read SDEVSTATE < $SCSI_DEVICE_PATH/state
read SDEVSTATE < $SCSI_DEVICE_PATH/state
[ "$SDEVSTATE" != "running" ] \
&& SDEVMARKER="$SDEVMARKER NotRunning"
fi