/usr/lib/dracut/modules.d/02zfsexpandknowledge/module-setup.sh is in zfs-dracut 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 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 | #!/bin/bash
get_devtype() {
local typ
typ=$(udevadm info --query=property --name="$1" | grep "^ID_FS_TYPE=" | sed 's|^ID_FS_TYPE=||')
if [ "$typ" = "" ] ; then
typ=$(blkid -c /dev/null "$1" -o value -s TYPE)
fi
echo "$typ"
}
get_pool_devices() {
# also present in 99zfssystemd
local poolconfigtemp
local poolconfigoutput
local pooldev
local prefix
local resolved
poolconfigtemp=`mktemp`
/sbin/zpool list -v -H -P "$1" > "$poolconfigtemp" 2>&1
if [ "$?" != "0" ] ; then
poolconfigoutput=$(cat "$poolconfigtemp")
dinfo "zfsexpandknowledge: pool $1 cannot be listed: $poolconfigoutput"
else
cat "$poolconfigtemp" | awk -F '\t' '/\t\/dev/ { print $2 }' | \
while read pooldev ; do
if [ -n "$pooldev" -a -e "$pooldev" ] ; then
if [ -h "$pooldev" ] ; then
resolved=`readlink -f "$pooldev"`
else
resolved="$pooldev"
fi
dinfo "zfsexpandknowledge: pool $1 has device $pooldev (which resolves to $resolved)"
echo "$resolved"
fi
done
fi
rm -f "$poolconfigtemp"
}
find_zfs_block_devices() {
local dev
local blockdev
local mp
local fstype
local pool
local key
local n
local poolconfigoutput
numfields=`head -1 /proc/self/mountinfo | awk '{print NF}'`
if [ "$numfields" == "10" ] ; then
fields="n n n n mp n n fstype dev n"
else
fields="n n n n mp n n n fstype dev n"
fi
while read $fields ; do
if [ "$fstype" != "zfs" ]; then continue ; fi
if [ "$mp" == "$1" ]; then
pool=$(echo "$dev" | cut -d / -f 1)
get_pool_devices "$pool"
fi
done < /proc/self/mountinfo
}
array_contains () {
local e
for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
return 1
}
check() {
local mp
local dev
local blockdevs
local fstype
local majmin
local _slavedev
local _slavedevname
local _slavedevtype
local _slavemajmin
local _dev
if [[ $hostonly ]]; then
for mp in \
"/" \
"/etc" \
"/bin" \
"/sbin" \
"/lib" \
"/lib64" \
"/usr" \
"/usr/bin" \
"/usr/sbin" \
"/usr/lib" \
"/usr/lib64" \
"/boot";
do
mp=$(readlink -f "$mp")
mountpoint "$mp" >/dev/null 2>&1 || continue
blockdevs=$(find_zfs_block_devices "$mp")
if [ -z "$blockdevs" ] ; then continue ; fi
dinfo "zfsexpandknowledge: block devices backing ZFS dataset $mp: $blockdevs"
for dev in $blockdevs
do
array_contains "$dev" "${host_devs[@]}" || host_devs+=("$dev")
fstype=$(get_devtype "$dev")
host_fs_types["$dev"]="$fstype"
majmin=$(get_maj_min "$dev")
if [[ -d /sys/dev/block/$majmin/slaves ]] ; then
for _slavedev in /sys/dev/block/$majmin/slaves/*; do
[[ -f $_slavedev/dev ]] || continue
_slavedev=/dev/$(basename "$_slavedev")
_slavedevname=$(udevadm info --query=property --name="$_slavedev" | grep "^DEVNAME=" | sed 's|^DEVNAME=||')
_slavedevtype=$(get_devtype "$_slavedevname")
_slavemajmin=$(get_maj_min "$_slavedevname")
dinfo "zfsexpandknowledge: slave block device backing ZFS dataset $mp: $_slavedevname"
array_contains "$_slavedevname" "${host_devs[@]}" || host_devs+=("$_slavedevname")
host_fs_types["$_slavedevname"]="$_slavedevtype"
done
fi
done
done
for a in "${host_devs[@]}"
do
dinfo "zfsexpandknowledge: host device $a"
done
for a in "${!host_fs_types[@]}"
do
dinfo "zfsexpandknowledge: device $a of type ${host_fs_types[$a]}"
done
fi
return 1
}
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