mod-md.sh

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