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#!/usr/bin/env 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 resolved
poolconfigtemp="$(mktemp)"
if ! @sbindir@/zpool list -v -H -P "$1" > "$poolconfigtemp" 2>&1 ; then
poolconfigoutput="$(cat "$poolconfigtemp")"
dinfo "zfsexpandknowledge: pool $1 cannot be listed: $poolconfigoutput"
else
awk -F '\t' '/\t\/dev/ { print $2 }' "$poolconfigtemp" | \
while read -r pooldev ; do
if [ -e "$pooldev" ] ; then
resolved="$(readlink -f "$pooldev")"
dinfo "zfsexpandknowledge: pool $1 has device $pooldev (which resolves to $resolved)"
echo "$resolved"
fi
done
fi
rm -f "$poolconfigtemp"
}
find_zfs_block_devices() {
local dev
local mp
local fstype
local pool
local _
numfields="$(awk '{print NF; exit}' /proc/self/mountinfo)"
if [ "$numfields" = "10" ] ; then
fields="_ _ _ _ mp _ _ fstype dev _"
else
fields="_ _ _ _ mp _ _ _ fstype dev _"
fi
# shellcheck disable=SC2086
while read -r ${fields?} ; do
[ "$fstype" = "zfs" ] || continue
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" == "$1" ]] && return 0; done
return 1
}
check() {
local mp
local dev
local blockdevs
local fstype
local majmin
local _depdev
local _depdevname
local _depdevtype
# shellcheck disable=SC2154
if [ -n "$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: ${blockdevs//$'\n'/ }"
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/$majmin/slaves" ] ; then
for _depdev in "/sys/dev/block/$majmin/slaves"/*; do
[[ -f $_depdev/dev ]] || continue
_depdev=/dev/$(basename "$_depdev")
_depdevname=$(udevadm info --query=property --name="$_depdev" | grep "^DEVNAME=" | sed 's|^DEVNAME=||')
_depdevtype=$(get_devtype "$_depdevname")
dinfo "zfsexpandknowledge: underlying block device backing ZFS dataset $mp: ${_depdevname//$'\n'/ }"
array_contains "$_depdevname" "${host_devs[@]}" || host_devs+=("$_depdevname")
host_fs_types["$_depdevname"]="$_depdevtype"
done
fi
done
done
for a in "${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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