1#!/usr/bin/env bash 2 3get_devtype() { 4 local typ 5 typ=$(udevadm info --query=property --name="$1" | sed -n 's|^ID_FS_TYPE=||p') 6 if [[ -z "$typ" ]] ; then 7 typ=$(blkid -c /dev/null "$1" -o value -s TYPE) 8 fi 9 echo "$typ" 10} 11 12get_pool_devices() { 13 # also present in 99zfssystemd 14 local poolconfigtemp 15 local poolconfigoutput 16 local pooldev 17 local resolved 18 poolconfigtemp="$(mktemp)" 19 if ! @sbindir@/zpool list -v -H -P "$1" > "$poolconfigtemp" 2>&1 ; then 20 poolconfigoutput="$(cat "$poolconfigtemp")" 21 dinfo "zfsexpandknowledge: pool $1 cannot be listed: $poolconfigoutput" 22 else 23 awk -F '\t' '/\t\/dev/ { print $2 }' "$poolconfigtemp" | \ 24 while read -r pooldev ; do 25 if [[ -e "$pooldev" ]] ; then 26 resolved="$(readlink -f "$pooldev")" 27 dinfo "zfsexpandknowledge: pool $1 has device $pooldev (which resolves to $resolved)" 28 echo "$resolved" 29 fi 30 done 31 fi 32 rm -f "$poolconfigtemp" 33} 34 35find_zfs_block_devices() { 36 local dev 37 local mp 38 local fstype 39 local _ 40 numfields="$(awk '{print NF; exit}' /proc/self/mountinfo)" 41 if [[ "$numfields" = "10" ]] ; then 42 fields="_ _ _ _ mp _ _ fstype dev _" 43 else 44 fields="_ _ _ _ mp _ _ _ fstype dev _" 45 fi 46 # shellcheck disable=SC2086 47 while read -r ${fields?} ; do 48 [[ "$fstype" = "zfs" ]] || continue 49 [[ "$mp" = "$1" ]] && get_pool_devices "${dev%%/*}" 50 done < /proc/self/mountinfo 51} 52 53array_contains () { 54 local e 55 for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done 56 return 1 57} 58 59check() { 60 # https://github.com/dracutdevs/dracut/pull/1711 provides a zfs_devs 61 # function to detect the physical devices backing zfs pools. If this 62 # function exists in the version of dracut this module is being called 63 # from, then it does not need to run. 64 type zfs_devs >/dev/null 2>&1 && return 1 65 66 local mp 67 local dev 68 local blockdevs 69 local fstype 70 local majmin 71 local _depdev 72 local _depdevname 73 local _depdevtype 74 75# shellcheck disable=SC2154 76if [[ -n "$hostonly" ]]; then 77 78 for mp in \ 79 "/" \ 80 "/etc" \ 81 "/bin" \ 82 "/sbin" \ 83 "/lib" \ 84 "/lib64" \ 85 "/usr" \ 86 "/usr/bin" \ 87 "/usr/sbin" \ 88 "/usr/lib" \ 89 "/usr/lib64" \ 90 "/boot"; 91 do 92 mp=$(readlink -f "$mp") 93 mountpoint "$mp" >/dev/null 2>&1 || continue 94 blockdevs=$(find_zfs_block_devices "$mp") 95 if [[ -z "$blockdevs" ]] ; then continue ; fi 96 dinfo "zfsexpandknowledge: block devices backing ZFS dataset $mp: ${blockdevs//$'\n'/ }" 97 for dev in $blockdevs 98 do 99 array_contains "$dev" "${host_devs[@]}" || host_devs+=("$dev") 100 fstype=$(get_devtype "$dev") 101 host_fs_types["$dev"]="$fstype" 102 majmin=$(get_maj_min "$dev") 103 if [[ -d "/sys/dev/block/$majmin/slaves" ]] ; then 104 for _depdev in "/sys/dev/block/$majmin/slaves"/*; do 105 [[ -f "$_depdev/dev" ]] || continue 106 _depdev="/dev/${_depdev##*/}" 107 _depdevname=$(udevadm info --query=property --name="$_depdev" | sed -n 's|^DEVNAME=||p') 108 _depdevtype=$(get_devtype "$_depdevname") 109 dinfo "zfsexpandknowledge: underlying block device backing ZFS dataset $mp: ${_depdevname//$'\n'/ }" 110 array_contains "$_depdevname" "${host_devs[@]}" || host_devs+=("$_depdevname") 111 host_fs_types["$_depdevname"]="$_depdevtype" 112 done 113 fi 114 done 115 done 116 for a in "${host_devs[@]}" 117 do 118 dinfo "zfsexpandknowledge: host device $a" 119 done 120 for a in "${!host_fs_types[@]}" 121 do 122 dinfo "zfsexpandknowledge: device $a of type ${host_fs_types[$a]}" 123 done 124 125fi 126 127return 1 128} 129