mod-ide.sh

   1 #!/bin/sh
   2 IDE_RCSID='$Revision$ $Date::                            $'
   3
   4 # geninitrd mod: ide
   5
   6 PREIDEMODS="-ide-core unknown -ide-detect -ide-disk -ide-gd_mod"
   7 PREIDEMODSOLD="-ide-probe -ide-probe-mod -ide-disk -ide-gd_mod"
   8
   9 # ???
  10 ide_only_root=${ide_only_root:-no}
  11
  12 # allow forcing loading IDE modules, likely from sysconfig/geninitrd
  13 ADDIDE=${ADDIDE:-no}
  14
  15 # return true if node is ide device
  16 # @param        string $node device node to be examined
  17 # @access       public
  18 is_ide() {
  19         local node="$1"
  20         if [ ! -e "$node" ]; then
  21                 warn "is_ide(): node $node doesn't exist!"
  22                 return 1
  23         fi
  24
  25         # TODO: more sophisticated check, not just pathname check
  26         if is_yes "$(echo "$node" | awk '/^\/dev\/(hd[a-l]|ide\/)/ { print "yes"; }')"; then
  27                 return 0
  28         fi
  29
  30         return 1
  31 }
  32
  33 # find modules for $devpath
  34 # @param        $devpath        device to be examined
  35 # @access       public
  36 find_modules_ide() {
  37         local devpath=$1
  38         # remove partition, if any
  39         local disk=${devpath%[0-9]*}
  40         # set blockdev for rootfs (hda, sdc, ...)
  41         local rootblkdev=${disk#/dev/}
  42
  43         local n
  44         if [ "$kernel_version_long" -lt "002004021" ]; then
  45                 debug "Finding IDE modules for kernels <= 2.4.20"
  46                 for n in $PREIDEMODSOLD; do
  47                         find_module "$n"
  48                 done
  49         else
  50                 local tryauto=1
  51                 for n in $PREIDEMODS; do
  52                         if [ "X$n" = "Xunknown" ]; then
  53                                 debug "Finding IDE modules using ide_hostadapter"
  54                                 local mod idemodules=$(modprobe_conf | awk '/ide_hostadapter/ && ! /^[\t ]*#/ { print $3; }')
  55                                 for mod in $idemodules; do
  56                                         tryauto=0;
  57                                         find_module "$mod"
  58                                 done
  59
  60                                 if [ "$tryauto" -eq 1 ]; then
  61                                         # If tryauto {{{
  62                                         if [ -r /usr/share/pci-database/ide.pci -a -r /proc/bus/pci/devices ]; then
  63                                                 debug "Finding IDE modules using PCI ID database"
  64                                                 # Finding IDE modules using PCI ID database {{{
  65                                                 if is_yes "${ide_only_root}"; then
  66                                                         if [ -f /sys/block/${rootblkdev}/device/../../vendor -a -f /sys/block/${rootblkdev}/device/../../device ]; then
  67                                                                 vendorid="$(awk ' { gsub(/0x/,NUL); print $0 } ' /sys/block/${rootblkdev}/device/../../vendor)"
  68                                                                 deviceid="$(awk ' { gsub(/0x/,NUL); print $0 } ' /sys/block/${rootblkdev}/device/../../device)"
  69                                                                 searchpciid="${vendorid}${deviceid}"
  70                                                         elif [ -f /proc/ide/${rootblkdev}/../config ]; then
  71                                                                 searchpciid="$(awk ' /pci bus/ { print $7$9 } ' /proc/ide/${rootblkdev}/../config)"
  72                                                         fi
  73                                                 fi
  74
  75                                                 if [ -z "${searchpciid}" ]; then
  76                                                         searchpciid="$(awk ' { print $2 } ' /proc/bus/pci/devices)"
  77                                                 fi
  78
  79                                                 idemodules=""
  80
  81                                                 for nb in $searchpciid; do
  82                                                         eval `awk -v pciid="$nb" '{
  83                                                                 gsub("\t"," ");
  84                                                                 gsub("  +", " ");
  85                                                                 gsub("^ ","");
  86                                                                 if (/^[\t ]*#/)
  87                                                                         next;
  88                                                                 compmod = $1 "";        # make sure comparison type will be string
  89                                                                                         # cause pci IDs are hexadecimal numeric
  90                                                                 if (compmod == pciid) {
  91                                                                         module=$2;
  92                                                         #               min_kernel=$3;  # now in ide.pci $3,$4 = vendor and device name
  93                                                         #               max_kernel=$4;  #
  94                                                                         exit 0;
  95                                                                 }
  96                                                         }
  97
  98                                                         END {
  99                                                                 print "module=" module "\nmin_kernel=" min_kernel "\nmax_kernel=\"" max_kernel "\"\n";
 100                                                         }' /usr/share/pci-database/ide.pci`
 101                                                         [ -n "$module" ] && idemodules="$idemodules $module"
 102                                                 done
 103                                                 if is_yes "$(awk ' /ide=reverse/ { print "yes" } ' /proc/cmdline)"; then
 104                                                         new_idemodules=""
 105                                                         for nc in idemodules; do
 106                                                                 new_idemodules="$nc $new_idemodules"
 107                                                         done
 108                                                         idemodules="${new_idemodules}"
 109                                                 fi
 110
 111                                                 if [ -z "$idemodules" ]; then
 112                                                         warn "rootfs on IDE device but no related modules found, loading ide-generic."
 113                                                         idemodules="ide-generic"
 114                                                 fi
 115
 116                                                 # }}}
 117                                                 for nd in $idemodules; do
 118                                                         find_module "-$nd"
 119                                                 done
 120                                         # }}}
 121                                         # else tryauto {{{
 122                                         else
 123                                                 [ -r /usr/share/pci-database/ide.pci ] || warn "/usr/share/pci-database/ide.pci missing."
 124                                                 [ -r /proc/bus/pci/devices ] || warn "/proc/bus/pci/devices missing."
 125                                                 warn "Automatic IDE modules finding not available."
 126                                         fi
 127                                         # }}}
 128                                 fi
 129                         else
 130                                 find_module "$n"
 131                         fi
 132                 done
 133         fi
 134 }
 135
 136 # generate initrd fragment for ide device init
 137 # @access       public
 138 initrd_gen_ide() {
 139         # nothing to do here
 140         return 0
 141 }