/usr/lib/zfs-linux/zpool.d/label is in zfsutils-linux 0.7.5-1ubuntu15.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 | #!/bin/sh
#
# Print some common lsblk values
#
# Any (lowercased) name symlinked to the lsblk script will be passed to lsblk
# as one of its --output names. Here's a partial list of --output names
# from the lsblk binary:
#
# Available columns (for --output):
# NAME device name
# KNAME internal kernel device name
# MAJ:MIN major:minor device number
# FSTYPE filesystem type
# MOUNTPOINT where the device is mounted
# LABEL filesystem LABEL
# UUID filesystem UUID
# RA read-ahead of the device
# RO read-only device
# RM removable device
# MODEL device identifier
# SIZE size of the device
# STATE state of the device
# OWNER user name
# GROUP group name
# MODE device node permissions
# ALIGNMENT alignment offset
# MIN-IO minimum I/O size
# OPT-IO optimal I/O size
# PHY-SEC physical sector size
# LOG-SEC logical sector size
# ROTA rotational device
# SCHED I/O scheduler name
# RQ-SIZE request queue size
# TYPE device type
# DISC-ALN discard alignment offset
# DISC-GRAN discard granularity
# DISC-MAX discard max bytes
# DISC-ZERO discard zeroes data
#
# If the script is run as just 'lsblk' then print out disk size, vendor,
# and model number.
helpstr="
label: Show filesystem label.
model: Show disk model number.
size: Show the disk capacity.
vendor: Show the disk vendor.
lsblk: Show the disk size, vendor, and model number."
script=$(basename "$0")
if [ "$1" = "-h" ] ; then
echo "$helpstr" | grep "$script:" | tr -s '\t' | cut -f 2-
exit
fi
if [ "$script" = "lsblk" ] ; then
list="size vendor model"
else
list=$(echo "$script" | tr '[:upper:]' '[:lower:]')
fi
# Older versions of lsblk don't support all these values (like SERIAL).
for i in $list ; do
# Special case: Looking up the size of a file-based vdev can't
# be done with lsblk.
if [ "$i" = "size" ] && [ -f "$VDEV_UPATH" ] ; then
size=$(du -h --apparent-size "$VDEV_UPATH" | cut -f 1)
echo "size=$size"
continue
fi
val=""
if val=$(eval "lsblk -dl -n -o $i $VDEV_UPATH 2>/dev/null") ; then
# Remove leading/trailing whitespace from value
val=$(echo "$val" | sed -e 's/^[[:space:]]*//' \
-e 's/[[:space:]]*$//')
fi
echo "$i=$val"
done
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