modules.d/95iscsi/iscsiroot.sh

   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=${iroot#iscsi:}
  35
  36 # XXX modprobe crc32c should go in the cmdline parser, but I haven't yet
  37 # figured out a way how to check whether this is built-in or not
  38 modprobe crc32c 2>/dev/null
  39
  40 [ -e /sys/module/bnx2i ] && iscsiuio
  41
  42 if getargbool 0 rd.iscsi.firmware -y iscsi_firmware ; then
  43     if [ -n "${root%%block:*}" ]; then
  44         # if root is not specified try to mount the whole iSCSI LUN
  45         printf 'ENV{DEVTYPE}!="partition", SYMLINK=="disk/by-path/*-iscsi-*-*", SYMLINK+="root"\n' >> /etc/udev/rules.d/99-iscsi-root.rules
  46         udevadm control --reload
  47     fi
  48     iscsistart -b
  49     exit 0
  50 fi
  51
  52 unset iscsi_initiator iscsi_target_name iscsi_target_ip iscsi_target_port
  53 unset iscsi_target_group iscsi_protocol iscsirw iscsi_lun
  54 unset iscsi_username iscsi_password
  55 unset iscsi_in_username iscsi_in_password
  56
  57 # override conf settings by command line options
  58 arg=$(getargs rd.iscsi.initiator iscsi_initiator=)
  59 [ -n "$arg" ] && iscsi_initiator=$arg
  60 arg=$(getargs rd.iscsi.target.name iscsi_target_name=)
  61 [ -n "$arg" ] && iscsi_target_name=$arg
  62 arg=$(getargs rd.iscsi.target.ip iscsi_target_ip)
  63 [ -n "$arg" ] && iscsi_target_ip=$arg
  64 arg=$(getargs rd.iscsi.target.port iscsi_target_port=)
  65 [ -n "$arg" ] && iscsi_target_port=$arg
  66 arg=$(getargs rd.iscsi.target.group iscsi_target_group=)
  67 [ -n "$arg" ] && iscsi_target_group=$arg
  68 arg=$(getargs rd.iscsi.username iscsi_username=)
  69 [ -n "$arg" ] && iscsi_username=$arg
  70 arg=$(getargs rd.iscsi.password iscsi_password)
  71 [ -n "$arg" ] && iscsi_password=$arg
  72 arg=$(getargs rd.iscsi.in.username iscsi_in_username=)
  73 [ -n "$arg" ] && iscsi_in_username=$arg
  74 arg=$(getargs rd.iscsi.in.password iscsi_in_password=)
  75 [ -n "$arg" ] && iscsi_in_password=$arg
  76
  77 handle_netroot()
  78 {
  79     iroot=$1
  80     # override conf/commandline options by dhcp root_path
  81     # FIXME this assumes that all values have been provided
  82     OLDIFS="$IFS"
  83     IFS=@
  84     set $iroot
  85     if [ $# -gt 1 ]; then
  86         authinfo=$1; shift
  87         iroot=$*
  88     # allow empty authinfo to allow having an @ in iscsi_target_name like this:
  89     # netroot=iscsi:@192.168.1.100::3260::iqn.2009-01.com.example:testdi@sk
  90         if [ -n "$authinfo" ]; then
  91             IFS=:
  92             set $authinfo
  93             iscsi_username=$1
  94             iscsi_password=$2
  95             if [ $# -gt 2 ]; then
  96                 iscsi_in_username=$3
  97                 iscsi_in_password=$4
  98             fi
  99         fi
 100     fi
 101
 102     IFS="$OLDIFS"
 103
 104     local v=${iroot}:
 105     local i
 106     set --
 107     while [ -n "$v" ]; do
 108         if [ "${v#\[*:*:*\]:}" != "$v" ]; then
 109         # handle IPv6 address
 110             i="${v%%\]:*}"
 111             i="${i##\[}"
 112             set -- "$@" "$i"
 113             v=${v#\[$i\]:}
 114         else
 115             set -- "$@" "${v%%:*}"
 116             v=${v#*:}
 117         fi
 118     done
 119     iscsi_target_ip=$1; shift
 120     iscsi_protocol=$1; shift # ignored
 121     iscsi_target_port=$1; shift
 122     iscsi_lun=$1; shift
 123     IFS=:
 124     iscsi_target_name=$*
 125     IFS="$OLDIFS"
 126 # XXX is this needed?
 127     getarg ro && iscsirw=ro
 128     getarg rw && iscsirw=rw
 129     fsopts=${fsopts+$fsopts,}${iscsirw}
 130
 131     if [ -z $iscsi_initiator ]; then
 132     # XXX Where are these from?
 133         [ -f /etc/initiatorname.iscsi ] && . /etc/initiatorname.iscsi
 134         [ -f /etc/iscsi/initiatorname.iscsi ] && . /etc/iscsi/initiatorname.iscsi
 135         iscsi_initiator=$InitiatorName
 136
 137     # XXX rfc3720 says 'SCSI Initiator Name: The iSCSI Initiator Name specifies
 138     # the worldwide unique name of the initiator.' Could we use hostname/ip
 139     # if missing?
 140     fi
 141
 142     if [ -z $iscsi_initiator ]; then
 143        if [ -f /sys/firmware/ibft/initiator/initiator-name ]; then
 144            iscsi_initiator=$(while read line; do echo $line;done < /sys/firmware/ibft/initiator-name)
 145        fi
 146     fi
 147
 148     if [ -z $iscsi_target_port ]; then
 149         iscsi_target_port=3260
 150     fi
 151
 152     if [ -z $iscsi_target_group ]; then
 153         iscsi_target_group=1
 154     fi
 155
 156     if [ -z $iscsi_initiator ]; then
 157     # XXX is this correct?
 158         iscsi_initiator=$(iscsi-iname)
 159     fi
 160
 161     if [ -z $iscsi_lun ]; then
 162         iscsi_lun=0
 163     fi
 164
 165     echo "InitiatorName='$iscsi_initiator'" > /run/initiatorname.iscsi
 166     ln -s /run/initiatorname.iscsi /dev/.initiatorname.iscsi
 167
 168 # FIXME $iscsi_protocol??
 169
 170     if [ -n "${root%%block:*}" ]; then
 171     # if root is not specified try to mount the whole iSCSI LUN
 172         printf 'SYMLINK=="disk/by-path/*-iscsi-*-%s", SYMLINK+="root"\n' $iscsi_lun >> /etc/udev/rules.d/99-iscsi-root.rules
 173     fi
 174
 175     # inject new exit_if_exists
 176     echo 'settle_exit_if_exists="--exit-if-exists=/dev/root"; rm "$job"' > $hookdir/initqueue/iscsi-settle.sh
 177
 178     # force udevsettle to break
 179     > $hookdir/initqueue/work
 180
 181     iscsistart -i $iscsi_initiator -t $iscsi_target_name        \
 182         -g $iscsi_target_group -a $iscsi_target_ip      \
 183         -p $iscsi_target_port \
 184         ${iscsi_username+-u $iscsi_username} \
 185         ${iscsi_password+-w $iscsi_password} \
 186         ${iscsi_in_username+-U $iscsi_in_username} \
 187         ${iscsi_in_password+-W $iscsi_in_password} || :
 188
 189 # install mount script
 190     if [ -n "${root%%block:*}" ]; then
 191     # if root is not specified try to mount the whole iSCSI LUN
 192         echo "iscsi_lun=$iscsi_lun . /bin/mount-lun.sh " > $hookdir/mount/01-$$-iscsi.sh
 193     fi
 194 }
 195
 196 # loop over all netroot parameter
 197 if getarg netroot; then
 198     for nroot in $(getargs netroot); do
 199         [ "${netroot%%:*}" = "iscsi" ] || continue
 200         handle_netroot ${nroot##iscsi:}
 201     done
 202 else
 203     handle_netroot $iroot
 204 fi
 205
 206 need_shutdown
 207
 208 # now we have a root filesystem somewhere in /dev/sda*
 209 # let the normal block handler handle root=
 210 exit 0