Gecko [ nrupathungauniversityblr.ac.in ]

Name	Size	Permission
hwdb.d	[ DIR ]	drwxr-xr-x
rules.d	[ DIR ]	drwxr-xr-x
ata_id	42.16 KB	-rwxr-xr-x
bcache-export-cached	1.13 KB	-rwxr-xr-x
bcache-register	5.99 KB	-rwxr-xr-x
cdrom_id	54.16 KB	-rwxr-xr-x
collect	42.17 KB	-rwxr-xr-x
hdparm	583 B	-rwxr-xr-x
hwclock-set	776 B	-rwxr-xr-x
hwdb.bin	8.55 MB	-r--r--r--
mtd_probe	5.98 KB	-rwxr-xr-x
probe-bcache	9.99 KB	-rwxr-xr-x
scsi_id	54.71 KB	-rwxr-xr-x
snappy-app-dev	38.07 KB	-rwxr-xr-x
v4l_id	14.08 KB	-rwxr-xr-x

Code Editor : bcache-export-cached

#!/bin/sh
#
# This program reads the bcache superblock on bcacheX slaves to extract the
# dev.uuid and dev.label which refer to a specific backing device.
#
# It integrates with udev 'import' by writing CACHED_UUID=X and optionally
# CACHED_LABEL=X for the backing device of the provided bcache device.
# Ignore caching devices by skipping unless sb.version=1
#
# There is 1 and only 1 backing device (slaves/*) for a bcache device.

TEMPNODE=${1}               # /dev/bcacheN
DEVNAME=${TEMPNODE##*/}     # /dev/bcacheN -> bcacheN

for slave in "/sys/class/block/$DEVNAME/slaves"/*; do
    [ -d "$slave" ] || continue
    /usr/sbin/bcache-super-show "/dev/${slave##*/}" |
       gawk '$1 == "sb.version" { sbver=$2; }
            $1 == "dev.uuid" { uuid=$2; }
            $1 == "dev.label" && $2 != "(empty)" { label=$2; }
            END {
                if (sbver == 1 && uuid) {
                    print("CACHED_UUID=" uuid)
                    if (label) print("CACHED_LABEL=" label)
                    exit(0)
                }
                exit(1);
            }'
    # gawk exits 0 if it found a backing device.
    [ $? -eq 0 ] && exit 0
done

${this.title}

Code Editor : bcache-export-cached