129 lines
3.7 KiB
Bash
Executable File
129 lines
3.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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get_devtype() {
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local typ
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typ=$(udevadm info --query=property --name="$1" | sed -n 's|^ID_FS_TYPE=||p')
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if [ -z "$typ" ] ; then
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typ=$(blkid -c /dev/null "$1" -o value -s TYPE)
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fi
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echo "$typ"
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}
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get_pool_devices() {
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# also present in 99zfssystemd
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local poolconfigtemp
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local poolconfigoutput
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local pooldev
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local resolved
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poolconfigtemp="$(mktemp)"
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if ! @sbindir@/zpool list -v -H -P "$1" > "$poolconfigtemp" 2>&1 ; then
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poolconfigoutput="$(cat "$poolconfigtemp")"
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dinfo "zfsexpandknowledge: pool $1 cannot be listed: $poolconfigoutput"
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else
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awk -F '\t' '/\t\/dev/ { print $2 }' "$poolconfigtemp" | \
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while read -r pooldev ; do
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if [ -e "$pooldev" ] ; then
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resolved="$(readlink -f "$pooldev")"
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dinfo "zfsexpandknowledge: pool $1 has device $pooldev (which resolves to $resolved)"
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echo "$resolved"
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fi
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done
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fi
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rm -f "$poolconfigtemp"
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}
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find_zfs_block_devices() {
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local dev
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local mp
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local fstype
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local _
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numfields="$(awk '{print NF; exit}' /proc/self/mountinfo)"
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if [ "$numfields" = "10" ] ; then
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fields="_ _ _ _ mp _ _ fstype dev _"
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else
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fields="_ _ _ _ mp _ _ _ fstype dev _"
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fi
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# shellcheck disable=SC2086
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while read -r ${fields?} ; do
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[ "$fstype" = "zfs" ] || continue
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[ "$mp" = "$1" ] && get_pool_devices "${dev%%/*}"
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done < /proc/self/mountinfo
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}
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array_contains () {
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local e
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for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
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return 1
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}
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check() {
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# https://github.com/dracutdevs/dracut/pull/1711 provides a zfs_devs
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# function to detect the physical devices backing zfs pools. If this
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# function exists in the version of dracut this module is being called
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# from, then it does not need to run.
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type zfs_devs >/dev/null 2>&1 && return 1
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local mp
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local dev
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local blockdevs
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local fstype
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local majmin
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local _depdev
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local _depdevname
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local _depdevtype
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# shellcheck disable=SC2154
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if [ -n "$hostonly" ]; then
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for mp in \
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"/" \
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"/etc" \
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"/bin" \
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"/sbin" \
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"/lib" \
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"/lib64" \
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"/usr" \
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"/usr/bin" \
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"/usr/sbin" \
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"/usr/lib" \
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"/usr/lib64" \
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"/boot";
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do
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mp=$(readlink -f "$mp")
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mountpoint "$mp" >/dev/null 2>&1 || continue
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blockdevs=$(find_zfs_block_devices "$mp")
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if [ -z "$blockdevs" ] ; then continue ; fi
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dinfo "zfsexpandknowledge: block devices backing ZFS dataset $mp: ${blockdevs//$'\n'/ }"
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for dev in $blockdevs
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do
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array_contains "$dev" "${host_devs[@]}" || host_devs+=("$dev")
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fstype=$(get_devtype "$dev")
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host_fs_types["$dev"]="$fstype"
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majmin=$(get_maj_min "$dev")
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if [ -d "/sys/dev/block/$majmin/slaves" ] ; then
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for _depdev in "/sys/dev/block/$majmin/slaves"/*; do
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[ -f "$_depdev/dev" ] || continue
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_depdev="/dev/${_depdev##*/}"
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_depdevname=$(udevadm info --query=property --name="$_depdev" | sed -n 's|^DEVNAME=||p')
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_depdevtype=$(get_devtype "$_depdevname")
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dinfo "zfsexpandknowledge: underlying block device backing ZFS dataset $mp: ${_depdevname//$'\n'/ }"
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array_contains "$_depdevname" "${host_devs[@]}" || host_devs+=("$_depdevname")
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host_fs_types["$_depdevname"]="$_depdevtype"
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done
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fi
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done
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done
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for a in "${host_devs[@]}"
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do
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dinfo "zfsexpandknowledge: host device $a"
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done
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for a in "${!host_fs_types[@]}"
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do
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dinfo "zfsexpandknowledge: device $a of type ${host_fs_types[$a]}"
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done
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fi
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return 1
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}
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