modules.d/95iscsi/iscsiroot

   1 #!/bin/sh
   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 # This implementation is incomplete: Discovery mode is not implemented and
   6 # the argument handling doesn't follow currently agreed formats. This is mainly
   7 # because rfc4173 does not say anything about iscsi_initiator but open-iscsi's
   8 # iscsistart needs this.
   9 #
  10
  11 type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
  12
  13 PATH=/usr/sbin:/usr/bin:/sbin:/bin
  14
  15 # Huh? Empty $1?
  16 [ -z "$1" ] && exit 1
  17
  18 # Huh? Empty $2?
  19 [ -z "$2" ] && exit 1
  20
  21 # Huh? Empty $3? This isn't really necessary, since NEWROOT isn't
  22 # used here. But let's be consistent
  23 [ -z "$3" ] && exit 1
  24
  25 # root is in the form root=iscsi:[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname>
  26 netif="$1"
  27 iroot="$2"
  28
  29 source_all /etc/conf.d
  30
  31 # If it's not iscsi we don't continue
  32 [ "${iroot%%:*}" = "iscsi" ] || exit 1
  33
  34 iroot=${iroot#iscsi:}
  35
  36 # XXX modprobe crc32c should go in the cmdline parser, but I haven't yet
  37 # figured out a way how to check whether this is built-in or not
  38 modprobe crc32c 2>/dev/null
  39
  40
  41 [ -e /tmp/root.info ] && . /tmp/root.info
  42
  43 if getargbool 0 rd.iscsi.firmware -y iscsi_firmware ; then
  44     if [ -n "${root%%block:*}" ]; then
  45         # if root is not specified try to mount the whole iSCSI LUN
  46         printf 'ENV{DEVTYPE}!="partition", SYMLINK=="disk/by-path/*-iscsi-*-*", SYMLINK+="root"\n' >> /etc/udev/rules.d/99-iscsi-root.rules
  47     fi
  48     iscsistart -b
  49     exit 0
  50 fi
  51
  52 # override conf settings by command line options
  53 arg=$(getargs rd.iscsi.initiator iscsi_initiator=)
  54 [ -n "$arg" ] && iscsi_initiator=$arg
  55 arg=$(getargs rd.iscsi.target.name iscsi_target_name=)
  56 [ -n "$arg" ] && iscsi_target_name=$arg
  57 arg=$(getargs rd.iscsi.target.ip iscsi_target_ip)
  58 [ -n "$arg" ] && iscsi_target_ip=$arg
  59 arg=$(getargs rd.iscsi.target.port iscsi_target_port=)
  60 [ -n "$arg" ] && iscsi_target_port=$arg
  61 arg=$(getargs rd.iscsi.target.group iscsi_target_group=)
  62 [ -n "$arg" ] && iscsi_target_group=$arg
  63 arg=$(getargs rd.iscsi.username iscsi_username=)
  64 [ -n "$arg" ] && iscsi_username=$arg
  65 arg=$(getargs rd.iscsi.password iscsi_password)
  66 [ -n "$arg" ] && iscsi_password=$arg
  67 arg=$(getargs rd.iscsi.in.username iscsi_in_username=)
  68 [ -n "$arg" ] && iscsi_in_username=$arg
  69 arg=$(getargs rd.iscsi.in.password iscsi_in_password=)
  70 [ -n "$arg" ] && iscsi_in_password=$arg
  71
  72 handle_netroot()
  73 {
  74     iroot=$1
  75     # override conf/commandline options by dhcp root_path
  76     # FIXME this assumes that all values have been provided
  77     OLDIFS="$IFS"
  78     IFS=@
  79     set $iroot
  80     if [ $# -gt 1 ]; then
  81         authinfo=$1; shift
  82         iroot=$*
  83     # allow empty authinfo to allow having an @ in iscsi_target_name like this:
  84     # netroot=iscsi:@192.168.1.100::3260::iqn.2009-01.com.example:testdi@sk
  85         if [ -n "$authinfo" ]; then
  86             IFS=:
  87             set $authinfo
  88             iscsi_username=$1
  89             iscsi_password=$2
  90             if [ $# -gt 2 ]; then
  91                 iscsi_in_username=$3
  92                 iscsi_in_password=$4
  93             fi
  94         fi
  95     fi
  96
  97     IFS="$OLDIFS"
  98
  99     local v=${iroot}:
 100     local i
 101     set --
 102     while [ -n "$v" ]; do
 103         if [ "${v#\[*:*:*\]:}" != "$v" ]; then
 104         # handle IPv6 address
 105             i="${v%%\]:*}"
 106             i="${i##\[}"
 107             set -- "$@" "$i"
 108             v=${v#\[$i\]:}
 109         else
 110             set -- "$@" "${v%%:*}"
 111             v=${v#*:}
 112         fi
 113     done
 114     iscsi_target_ip=$1; shift
 115     iscsi_protocol=$1; shift # ignored
 116     iscsi_target_port=$1; shift
 117     iscsi_lun=$1; shift
 118     IFS=:
 119     iscsi_target_name=$*
 120     IFS="$OLDIFS"
 121 # XXX is this needed?
 122     getarg ro && iscsirw=ro
 123     getarg rw && iscsirw=rw
 124     fsopts=${fsopts+$fsopts,}${iscsirw}
 125
 126     if [ -z $iscsi_initiator ]; then
 127     # XXX Where are these from?
 128         [ -f /etc/initiatorname.iscsi ] && . /etc/initiatorname.iscsi
 129         [ -f /etc/iscsi/initiatorname.iscsi ] && . /etc/iscsi/initiatorname.iscsi
 130         iscsi_initiator=$InitiatorName
 131
 132     # XXX rfc3720 says 'SCSI Initiator Name: The iSCSI Initiator Name specifies
 133     # the worldwide unique name of the initiator.' Could we use hostname/ip
 134     # if missing?
 135     fi
 136
 137     if [ -z $iscsi_target_port ]; then
 138         iscsi_target_port=3260
 139     fi
 140
 141     if [ -z $iscsi_target_group ]; then
 142         iscsi_target_group=1
 143     fi
 144
 145     if [ -z $iscsi_initiator ]; then
 146     # XXX is this correct?
 147         iscsi_initiator=$(iscsi-iname)
 148     fi
 149
 150     if [ -z $iscsi_lun ]; then
 151         iscsi_lun=0
 152     fi
 153
 154     echo "InitiatorName='$iscsi_initiator'" > /run/initiatorname.iscsi
 155     ln -s /run/initiatorname.iscsi /dev/.initiatorname.iscsi
 156
 157 # FIXME $iscsi_protocol??
 158
 159     if [ -n "${root%%block:*}" ]; then
 160     # if root is not specified try to mount the whole iSCSI LUN
 161         printf 'SYMLINK=="disk/by-path/*-iscsi-*-%s", SYMLINK+="root"\n' $iscsi_lun >> /etc/udev/rules.d/99-iscsi-root.rules
 162     fi
 163
 164     # inject new exit_if_exists
 165     echo 'settle_exit_if_exists="--exit-if-exists=/dev/root"; rm "$job"' > $hookdir/initqueue/iscsi-settle.sh
 166
 167     # force udevsettle to break
 168     > $hookdir/initqueue/work
 169
 170     iscsistart -i $iscsi_initiator -t $iscsi_target_name        \
 171         -g $iscsi_target_group -a $iscsi_target_ip      \
 172         -p $iscsi_target_port \
 173         ${iscsi_username+-u $iscsi_username} \
 174         ${iscsi_password+-w $iscsi_password} \
 175         ${iscsi_in_username+-U $iscsi_in_username} \
 176         ${iscsi_in_password+-W $iscsi_in_password} || :
 177
 178 # install mount script
 179     if [ -n "${root%%block:*}" ]; then
 180     # if root is not specified try to mount the whole iSCSI LUN
 181         echo "iscsi_lun=$iscsi_lun . /bin/mount-lun.sh " > $hookdir/mount/01-$$-iscsi.sh
 182     fi
 183 }
 184
 185 # loop over all netroot parameter
 186 if getarg netroot; then
 187     for nroot in $(getargs netroot); do
 188         [ "${netroot%%:*}" = "iscsi" ] || continue
 189         handle_netroot ${nroot##iscsi:}
 190     done
 191 else
 192     handle_netroot $iroot
 193 fi
 194
 195 # now we have a root filesystem somewhere in /dev/sda*
 196 # let the normal block handler handle root=
 197 exit 0