modules.d/80cms/cmssetup.sh

   1 #!/bin/bash
   2 # -*- mode: shell-script; indent-tabs-mode: nil; sh-basic-offset: 4; -*-
   3 # ex: ts=8 sw=4 sts=4 et filetype=sh
   4
   5 type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
   6
   7 function sysecho () {
   8     file="$1"
   9     shift
  10     local i=1
  11     while [ $i -le 10 ] ; do
  12         if [ ! -f "$file" ]; then
  13             sleep 1
  14             i=$((i+1))
  15         else
  16             break
  17         fi
  18     done
  19     local status
  20     read status < "$file"
  21     if [[ ! $status == $* ]]; then
  22         [ -f "$file" ] && echo $* > "$file"
  23     fi
  24 }
  25
  26 function dasd_settle() {
  27     local dasd_status=/sys/bus/ccw/devices/$1/status
  28     if [ ! -f $dasd_status ]; then
  29         return 1
  30     fi
  31     local i=1
  32     while [ $i -le 60 ] ; do
  33         local status
  34         read status < $dasd_status
  35         case $status in
  36             online|unformatted)
  37                 return 0 ;;
  38             *)
  39                 sleep 0.1
  40                 i=$((i+1)) ;;
  41         esac
  42     done
  43     return 1
  44 }
  45
  46 function dasd_settle_all() {
  47     for dasdccw in $(while read line; do echo ${line%%(*}; done < /proc/dasd/devices) ; do
  48         if ! dasd_settle $dasdccw ; then
  49             echo $"Could not access DASD $dasdccw in time"
  50             return 1
  51         fi
  52     done
  53     return 0
  54     }
  55
  56 # prints a canonocalized device bus ID for a given devno of any format
  57     function canonicalize_devno()
  58     {
  59         case ${#1} in
  60             3) echo "0.0.0${1}" ;;
  61             4) echo "0.0.${1}" ;;
  62             *) echo "${1}" ;;
  63         esac
  64         return 0
  65     }
  66
  67 # read file from CMS and write it to /tmp
  68     function readcmsfile() # $1=dasdport $2=filename
  69     {
  70         local dev
  71         local numcpus
  72         local devname
  73         local ret=0
  74         if [ $# -ne 2 ]; then return; fi
  75     # precondition: udevd created dasda block device node
  76         if ! dasd_cio_free -d $1 ; then
  77             echo $"DASD $1 could not be cleared from device blacklist"
  78             return 1
  79         fi
  80
  81         modprobe dasd_mod dasd=$CMSDASD
  82         modprobe dasd_eckd_mod
  83         udevadm settle
  84
  85     # precondition: dasd_eckd_mod driver incl. dependencies loaded,
  86     #               dasd_mod must be loaded without setting any DASD online
  87         dev=$(canonicalize_devno $1)
  88         numcpus=$(
  89             while read line; do
  90                 if strstr "$line" "# processors"; then
  91                     echo ${line##*:};
  92                     break;
  93                 fi;
  94             done < /proc/cpuinfo
  95         )
  96
  97         if [ ${numcpus} -eq 1 ]; then
  98             echo 1 > /sys/bus/ccw/devices/$dev/online
  99         else
 100             if ! sysecho /sys/bus/ccw/devices/$dev/online 1; then
 101                 echo $"DASD $dev could not be set online"
 102                 return 1
 103             fi
 104             udevadm settle
 105             if ! dasd_settle $dev ; then
 106                 echo $"Could not access DASD $dev in time"
 107                 return 1
 108             fi
 109         fi
 110
 111         udevadm settle
 112
 113         devname=$(cd /sys/bus/ccw/devices/$dev/block; set -- *; [ -b /dev/$1 ] && echo $1)
 114         devname=${devname:-dasda}
 115
 116         [[ -d /mnt ]] || mkdir /mnt
 117         if cmsfs-fuse --to=UTF-8 -a /dev/$devname /mnt; then
 118             cat /mnt/$2 > /run/initramfs/$2
 119             umount /mnt || umount -l /mnt
 120             udevadm settle
 121         else
 122             echo $"Could not read conf file $2 on CMS DASD $1."
 123             ret=1
 124         fi
 125
 126         if ! sysecho /sys/bus/ccw/devices/$dev/online 0; then
 127             echo $"DASD $dev could not be set offline again"
 128         #return 1
 129         fi
 130         udevadm settle
 131
 132     # unbind all dasds to unload the dasd modules for a clean start
 133         ( cd /sys/bus/ccw/drivers/dasd-eckd; for i in *.*; do echo $i > unbind;done)
 134         udevadm settle
 135         modprobe -r dasd_eckd_mod
 136         udevadm settle
 137         modprobe -r dasd_diag_mod
 138         udevadm settle
 139         modprobe -r dasd_mod
 140         udevadm settle
 141         return $ret
 142     }
 143
 144     processcmsfile()
 145     {
 146         source /tmp/cms.conf
 147
 148         if [[ $NETTYPE ]]; then
 149             (
 150                 echo -n $NETTYPE,$SUBCHANNELS
 151                 [[ $PORTNAME ]] && echo -n ",portname=$PORTNAME"
 152                 [[ $LAYER2 ]] && echo -n ",layer2=$LAYER2"
 153                 [[ "$NETTYPE" = "ctc" ]] && [[ $CTCPROT ]] && echo -n ",protocol=$CTCPROT"
 154                 echo
 155             ) >> /etc/ccw.conf
 156
 157             OLDIFS=$IFS
 158             IFS=,
 159             read -a subch_array <<< "indexzero,$SUBCHANNELS"
 160             IFS=$OLDIFS
 161             devbusid=${subch_array[1]}
 162             if [ "$NETTYPE" = "ctc" ]; then
 163                 driver="ctcm"
 164             else
 165                 driver=$NETTYPE
 166             fi
 167
 168             printf 'SUBSYSTEM=="net", ACTION=="add", DRIVERS=="%s", KERNELS=="%s", ENV{INTERFACE}=="?*", RUN+="/sbin/initqueue --onetime --unique --name cmsifup-$env{INTERFACE} /sbin/cmsifup $env{INTERFACE}"\n' "$driver" "$devbusid" > /etc/udev/rules.d/99-cms.rules
 169         # remove the default net rules
 170             rm -f /etc/udev/rules.d/91-default-net.rules
 171             [[ -f /etc/udev/rules.d/90-net.rules ]] \
 172                 || printf 'SUBSYSTEM=="net", ACTION=="online", RUN+="/sbin/initqueue --onetime --env netif=$env{INTERFACE} source_hook initqueue/online"\n' >> /etc/udev/rules.d/99-cms.rules
 173             udevadm control --reload
 174             znet_cio_free
 175         fi
 176
 177         if [[ $DASD ]]; then
 178             echo $DASD | normalize_dasd_arg > /etc/dasd.conf
 179             echo "options dasd_mod dasd=$DASD" > /etc/modprobe.d/dasd_mod.conf
 180             dasd_cio_free
 181         fi
 182
 183         unset _do_zfcp
 184         for i in ${!FCP_*}; do
 185             echo "${!i}" >> /etc/zfcp.conf
 186             _do_zfcp=1
 187         done
 188         [[ $_do_zfcp ]] && zfcp_cio_free
 189         unset _do_zfcp
 190     }
 191
 192     [[ $CMSDASD ]] || CMSDASD=$(getarg "CMSDASD=")
 193     [[ $CMSCONFFILE ]] || CMSCONFFILE=$(getarg "CMSCONFFILE=")
 194
 195 # Parse configuration
 196     if [ -n "$CMSDASD" -a -n "$CMSCONFFILE" ]; then
 197         if readcmsfile $CMSDASD $CMSCONFFILE; then
 198             ln -s /run/initramfs/$CMSCONFFILE /tmp/$CMSCONFFILE
 199             ln -s /run/initramfs/$CMSCONFFILE /tmp/cms.conf
 200             processcmsfile
 201         fi
 202     fi