mod-md.sh

   1 #!/bin/sh
   2 MD_RCSID='$Revision$ $Date::                            $'
   3
   4 # geninitrd mod: mdadm
   5 USE_MD=${USE_MD:-yes}
   6
   7 # if we should init md (softraid) at boot
   8 have_md=no
   9
  10 # setup geninitrd module
  11 # @access       public
  12 setup_mod_md() {
  13         mdassemble=$(find_tool $initrd_dir/mdassemble /sbin/initrd-mdassemble)
  14         if [ ! -x "$mdassemble" ]; then
  15                 USE_MD=no
  16         fi
  17         mdadm=$(find_tool /sbin/mdadm $initrd_dir/mdadm /sbin/initrd-mdadm)
  18         if [ ! -x "$mdadm" ]; then
  19                 USE_MD=no
  20         fi
  21 }
  22
  23 # return true if mdadm is set on $devpath
  24 # @param        string $devpath device node to be examined
  25 # @access       public
  26 is_md() {
  27         local devpath="$1"
  28
  29         # mdadm disabled
  30         if ! is_yes "$USE_MD"; then
  31                 return 1
  32         fi
  33
  34         if [[ "$devpath" == /dev/md* ]]; then
  35                 return 0
  36         fi
  37
  38         return 1
  39 }
  40
  41 # find md modules for $devpath
  42 # @param        $devpath        device to be examined
  43 # @return       false if $devpath is not on md
  44 # @access       public
  45 find_modules_md() {
  46         local found raidlevel
  47
  48         if [ -f /etc/mdadm.conf ]; then
  49                 debug "Finding RAID details using mdadm for rootdev=$1"
  50                 eval `($mdadm -v --examine --scan --config=/etc/mdadm.conf 2> /dev/null;$mdadm -v --detail --scan --config=/etc/mdadm.conf 2> /dev/null) | awk -v rootdev="$1" '
  51                 BEGIN {
  52                         found = "no";
  53                         dev_list = "";
  54                         raidlevel = ""
  55                         rootdev_new = rootdev
  56                         rootdev_alias = rootdev;
  57                         # alternative name: normalize from /dev/md/X to /dev/mdX
  58                         if (rootdev_alias ~ /\/dev\/md\/[0-9]+/) {
  59                                 gsub(/\/dev\/md\//,"/dev/md",rootdev_alias);
  60                         }
  61                         # alternative name: normalize from /dev/mdXpY to /dev/mdX
  62                         if (rootdev_alias ~/\/dev\/md[0-9]+p[0-9]+/) {
  63                                 gsub(/p[0-9]+/,"",rootdev_alias);
  64                         }
  65                 }
  66
  67                 /^ARRAY/ {
  68                         arr_device = $2
  69                         # normalize to /dev/mdX form
  70                         if (arr_device ~ /\/dev\/md\/[0-9]+/) {
  71                                 gsub(/\/dev\/md\//,"/dev/md",arr_device);
  72                         }
  73                         if ((arr_device == rootdev) || (arr_device == rootdev_alias)) {
  74                                 raidlevel=$3;
  75                                 rootdev_new=arr_device
  76                                 gsub(/level=/,NUL,raidlevel);
  77                                 if (raidlevel ~ /^raid([0-6]|10)/) {
  78                                         gsub(/raid/,NUL,raidlevel);
  79                                 };
  80                                 found="yes";
  81                                 getline x;
  82                                 if (x ~ /devices=/) {
  83                                         dev_list = x;
  84                                         gsub(".*devices=", NUL, dev_list);
  85                                         gsub(",", " ", dev_list);
  86                                 }
  87                         }
  88                 }
  89
  90                 END {
  91                         print "rootdev_new=" rootdev_new;
  92                         print "have_md=" found;
  93                         print "raidlevel=" raidlevel;
  94                         print "dev_list=\"" dev_list "\"";
  95                 }'`
  96         fi
  97
  98         if [ "$have_md" != "yes" -a -f /etc/raidtab ]; then
  99                 die "raidtools are not longer supported. Please migrate to mdadm setup!"
 100         fi
 101
 102         if is_yes "$have_md"; then
 103                 case "$raidlevel" in
 104                 [01]|10)
 105                         find_module "raid$raidlevel"
 106                         ;;
 107                 [456])
 108                         find_module "-raid$raidlevel"
 109                         find_module "-raid456"
 110                         ;;
 111                 linear)
 112                         find_module "linear"
 113                         ;;
 114                 *)
 115                         warn "raid level $number (in mdadm config) not recognized"
 116                         ;;
 117                 esac
 118         else
 119                 die "RAID devices not found for \"$1\", check your configuration!"
 120         fi
 121
 122         debug "md: found rootdev=$1 on device $rootdev_new with devices list ${dev_list}"
 123
 124         rootdev_nr=$(( $rootdev_nr + 1 ))
 125         eval "rootdev${rootdev_nr}=\"$rootdev_new\""
 126         eval "dev_list${rootdev_nr}=\"${dev_list}\""
 127
 128         for device in $dev_list; do
 129                 find_modules_for_devpath $device
 130         done
 131 }
 132
 133
 134 # generate initrd fragment for md
 135 # @access       public
 136 initrd_gen_md() {
 137         if ! is_yes "$have_md"; then
 138                 return
 139         fi
 140         debug "Setting up mdadm..."
 141
 142         inst_exec $mdassemble /bin/mdassemble
 143
 144         # LVM on RAID case
 145         local dev_list_extra ex_dev
 146         dev_list_extra=$(awk '/^DEVICE / { for (i=2; i<=NF; i++) { printf "%s ", $i; }; } ' /etc/mdadm.conf | xargs)
 147         new_dev_list_extra=""
 148         for ex_dev in $dev_list_extra; do
 149                 if [ "$ex_dev" = "partitions" ]; then
 150                         echo "DEVICE partitions" >> "$DESTDIR/etc/mdadm.conf"
 151                         # FIXME: find and copy partition devices from /proc/partitions
 152                         #        - best if done at runtime, now initrd gen time
 153                         continue
 154                 fi
 155                 echo "DEVICE $ex_dev" >> "$DESTDIR/etc/mdadm.conf"
 156                 new_dev_list_extra="$new_dev_list_extra $ex_dev"
 157         done
 158         dev_list_extra=$new_dev_list_extra
 159
 160         local cr_rootdev cr_dev_list do_md0=1 nr cr_dev_list_md f cr_md_conf
 161         for nr in `seq 1 $rootdev_nr`; do
 162                 eval cr_rootdev="\$rootdev${nr}"
 163                 eval cr_dev_list="\$dev_list${nr}"
 164                 debug echo "Setting up array ($cr_rootdev = $cr_dev_list)"
 165
 166                 [ "$cr_rootdev" = "/dev/md0" ] && do_md0=0
 167
 168                 echo "DEVICE $cr_dev_list" >> "$DESTDIR/etc/mdadm.conf"
 169                 cr_dev_list_md="$(echo "$cr_dev_list" | xargs | awk ' { gsub(/ +/,",",$0); print $0; }')"
 170                 cr_md_conf=$($mdadm --detail --brief --config=/etc/mdadm.conf $cr_rootdev | awk ' { gsub(/spares=[0-9]+/, "", $0); print $0; }')
 171                 if [ -n "$cr_md_conf" ]; then
 172                         echo "$cr_md_conf" >> "$DESTDIR/etc/mdadm.conf"
 173                 else
 174                         echo "ARRAY $cr_rootdev devices=$cr_dev_list_md" >> "$DESTDIR/etc/mdadm.conf"
 175                 fi
 176
 177                 for f in $cr_dev_list $cr_rootdev $dev_list_extra; do
 178                         # mkdir in case of devfs name
 179                         inst_d $(dirname $f)
 180                         [ -e "$DESTDIR/$f" ] && continue
 181                         # this works fine with and without devfs
 182                         inst $f $f
 183                 done
 184         done
 185
 186         add_linuxrc <<-EOF
 187         mdassemble
 188
 189         if [ "$DEBUGINITRD" ]; then
 190                 [ -e /proc/mdstat ] && echo "/proc/mdstat contents:" && cat /proc/mdstat
 191         fi
 192         EOF
 193
 194         # needed to determine md-version
 195         if [ "$do_md0" -eq 1 ]; then
 196                 mknod $DESTDIR/dev/md0 b 9 0
 197         fi
 198 }