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b3ab290855
PR 1711 (https://github.com/dracutdevs/dracut/pull/1711) adds a zfs_devs function to dracut to detect the physical devices backing zfs pools. If this function exists in the version of dracut this module is being called from, then it does not need to run. Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz> Signed-off-by: Savyasachee Jha <hi@savyasacheejha.com> Closes #13121
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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