mod-ide.sh

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