contrib/dracut/02zfsexpandknowledge/module-setup.sh.in

   1 #!/bin/sh
   2
   3 get_devtype() {
   4   local typ
   5   typ=$(udevadm info --query=property --name="$1" | grep "^ID_FS_TYPE=" | sed 's|^ID_FS_TYPE=||')
   6   if [ "$typ" = "" ] ; then
   7      typ=$(blkid -c /dev/null "$1" -o value -s TYPE)
   8   fi
   9   echo "$typ"
  10 }
  11
  12 get_pool_devices() {
  13   # also present in 99zfssystemd
  14   local poolconfigtemp
  15   local poolconfigoutput
  16   local pooldev
  17   local prefix
  18   local resolved
  19   poolconfigtemp=`mktemp`
  20   @sbindir@/zpool list -v -H -P "$1" > "$poolconfigtemp" 2>&1
  21   if [ "$?" != "0" ] ; then
  22     poolconfigoutput=$(cat "$poolconfigtemp")
  23     dinfo "zfsexpandknowledge: pool $1 cannot be listed: $poolconfigoutput"
  24   else
  25     cat "$poolconfigtemp" |  awk -F '\t' '/\t\/dev/ { print $2 }' | \
  26     while read pooldev ; do
  27         if [ -n "$pooldev" -a -e "$pooldev" ] ; then
  28           if [ -h "$pooldev" ] ; then
  29               resolved=`readlink -f "$pooldev"`
  30           else
  31               resolved="$pooldev"
  32           fi
  33           dinfo "zfsexpandknowledge: pool $1 has device $pooldev (which resolves to $resolved)"
  34           echo "$resolved"
  35         fi
  36     done
  37   fi
  38   rm -f "$poolconfigtemp"
  39 }
  40
  41 find_zfs_block_devices() {
  42     local dev
  43     local blockdev
  44     local mp
  45     local fstype
  46     local pool
  47     local key
  48     local n
  49     local poolconfigoutput
  50     numfields=`head -1 /proc/self/mountinfo | awk '{print NF}'`
  51     if [ "$numfields" == "10" ] ; then
  52         fields="n n n n mp n n fstype dev n"
  53     else
  54         fields="n n n n mp n n n fstype dev n"
  55     fi
  56     while read $fields ; do
  57        if [ "$fstype" != "zfs" ]; then continue ; fi
  58        if [ "$mp" == "$1" ]; then
  59            pool=$(echo "$dev" | cut -d / -f 1)
  60            get_pool_devices "$pool"
  61        fi
  62     done < /proc/self/mountinfo
  63 }
  64
  65 array_contains () {
  66   local e
  67   for e in "${@:2}"; do [[ "$e" == "$1" ]] && return 0; done
  68   return 1
  69 }
  70
  71 check() {
  72     local mp
  73     local dev
  74     local blockdevs
  75     local fstype
  76     local majmin
  77     local _slavedev
  78     local _slavedevname
  79     local _slavedevtype
  80     local _slavemajmin
  81     local _dev
  82
  83 if [[ $hostonly ]]; then
  84
  85     for mp in \
  86         "/" \
  87         "/etc" \
  88         "/bin" \
  89         "/sbin" \
  90         "/lib" \
  91         "/lib64" \
  92         "/usr" \
  93         "/usr/bin" \
  94         "/usr/sbin" \
  95         "/usr/lib" \
  96         "/usr/lib64" \
  97         "/boot";
  98     do
  99         mp=$(readlink -f "$mp")
 100         mountpoint "$mp" >/dev/null 2>&1 || continue
 101         blockdevs=$(find_zfs_block_devices "$mp")
 102         if [ -z "$blockdevs" ] ; then continue ; fi
 103         dinfo "zfsexpandknowledge: block devices backing ZFS dataset $mp: $blockdevs"
 104         for dev in $blockdevs
 105         do
 106             array_contains "$dev" "${host_devs[@]}" || host_devs+=("$dev")
 107             fstype=$(get_devtype "$dev")
 108             host_fs_types["$dev"]="$fstype"
 109             majmin=$(get_maj_min "$dev")
 110             if [[ -d /sys/dev/block/$majmin/slaves ]] ; then
 111                 for _slavedev in /sys/dev/block/$majmin/slaves/*; do
 112                     [[ -f $_slavedev/dev ]] || continue
 113                     _slavedev=/dev/$(basename "$_slavedev")
 114                     _slavedevname=$(udevadm info --query=property --name="$_slavedev" | grep "^DEVNAME=" | sed 's|^DEVNAME=||')
 115                     _slavedevtype=$(get_devtype "$_slavedevname")
 116                     _slavemajmin=$(get_maj_min "$_slavedevname")
 117                     dinfo "zfsexpandknowledge: slave block device backing ZFS dataset $mp: $_slavedevname"
 118                     array_contains "$_slavedevname" "${host_devs[@]}" || host_devs+=("$_slavedevname")
 119                     host_fs_types["$_slavedevname"]="$_slavedevtype"
 120                 done
 121             fi
 122         done
 123     done
 124     for a in "${host_devs[@]}"
 125         do
 126         dinfo "zfsexpandknowledge: host device $a"
 127     done
 128     for a in "${!host_fs_types[@]}"
 129         do
 130         dinfo "zfsexpandknowledge: device $a of type ${host_fs_types[$a]}"
 131     done
 132
 133 fi
 134
 135 return 1
 136 }