modules.d/95iscsi/iscsiroot.sh

   1 #!/bin/sh
   2 #
   3 # This implementation is incomplete: Discovery mode is not implemented and
   4 # the argument handling doesn't follow currently agreed formats. This is mainly
   5 # because rfc4173 does not say anything about iscsi_initiator but open-iscsi's
   6 # iscsistart needs this.
   7 #
   8
   9 type getarg >/dev/null 2>&1 || . /lib/dracut-lib.sh
  10 type parse_iscsi_root >/dev/null 2>&1 || . /lib/net-lib.sh
  11 type write_fs_tab >/dev/null 2>&1 || . /lib/fs-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="$2"
  28
  29 # If it's not iscsi we don't continue
  30 [ "${iroot%%:*}" = "iscsi" ] || exit 1
  31
  32 iroot=${iroot#iscsi}
  33 iroot=${iroot#:}
  34
  35 # XXX modprobe crc32c should go in the cmdline parser, but I haven't yet
  36 # figured out a way how to check whether this is built-in or not
  37 modprobe crc32c 2>/dev/null
  38
  39 if [ -z "${DRACUT_SYSTEMD}" ] && [ -e /sys/module/bnx2i ] && ! [ -e /tmp/iscsiuio-started ]; then
  40         iscsiuio
  41         > /tmp/iscsiuio-started
  42 fi
  43
  44
  45 handle_firmware()
  46 {
  47     local ifaces retry
  48
  49     # Depending on the 'ql4xdisablesysfsboot' qla4xxx
  50     # will be autostarting sessions without presenting
  51     # them via the firmware interface.
  52     # In these cases 'iscsiadm -m fw' will fail, but
  53     # the iSCSI sessions will still be present.
  54     if ! iscsiadm -m fw; then
  55         warn "iscsiadm: Could not get list of targets from firmware."
  56     else
  57         ifaces=( $(echo /sys/firmware/ibft/ethernet*) )
  58         retry=$(cat /tmp/session-retry)
  59
  60         if [ $retry -lt ${#ifaces[*]} ]; then
  61             let retry++
  62             echo $retry > /tmp/session-retry
  63             return 1
  64         else
  65             rm /tmp/session-retry
  66         fi
  67
  68         if ! iscsiadm -m fw -l; then
  69             warn "iscsiadm: Log-in to iscsi target failed"
  70         else
  71             need_shutdown
  72         fi
  73     fi
  74     [ -d /sys/class/iscsi_session ] || return 1
  75     echo 'started' > "/tmp/iscsistarted-iscsi:"
  76     echo 'started' > "/tmp/iscsistarted-firmware"
  77
  78     return 0
  79 }
  80
  81
  82 handle_netroot()
  83 {
  84     local iscsi_initiator iscsi_target_name iscsi_target_ip iscsi_target_port
  85     local iscsi_target_group iscsi_protocol iscsirw iscsi_lun
  86     local iscsi_username iscsi_password
  87     local iscsi_in_username iscsi_in_password
  88     local iscsi_iface_name iscsi_netdev_name
  89     local iscsi_param param
  90     local p
  91
  92     # override conf settings by command line options
  93     arg=$(getarg rd.iscsi.initiator -d iscsi_initiator=)
  94     [ -n "$arg" ] && iscsi_initiator=$arg
  95     arg=$(getargs rd.iscsi.target.name -d iscsi_target_name=)
  96     [ -n "$arg" ] && iscsi_target_name=$arg
  97     arg=$(getarg rd.iscsi.target.ip -d iscsi_target_ip)
  98     [ -n "$arg" ] && iscsi_target_ip=$arg
  99     arg=$(getarg rd.iscsi.target.port -d iscsi_target_port=)
 100     [ -n "$arg" ] && iscsi_target_port=$arg
 101     arg=$(getarg rd.iscsi.target.group -d iscsi_target_group=)
 102     [ -n "$arg" ] && iscsi_target_group=$arg
 103     arg=$(getarg rd.iscsi.username -d iscsi_username=)
 104     [ -n "$arg" ] && iscsi_username=$arg
 105     arg=$(getarg rd.iscsi.password -d iscsi_password)
 106     [ -n "$arg" ] && iscsi_password=$arg
 107     arg=$(getarg rd.iscsi.in.username -d iscsi_in_username=)
 108     [ -n "$arg" ] && iscsi_in_username=$arg
 109     arg=$(getarg rd.iscsi.in.password -d iscsi_in_password=)
 110     [ -n "$arg" ] && iscsi_in_password=$arg
 111     for p in $(getargs rd.iscsi.param -d iscsi_param); do
 112         iscsi_param="$iscsi_param $p"
 113     done
 114
 115     parse_iscsi_root "$1" || return 1
 116
 117     # Bail out early, if there is no route to the destination
 118     if is_ip "$iscsi_target_ip" && [ "$netif" != "timeout" ] && ! all_ifaces_setup && getargbool 1 rd.iscsi.testroute; then
 119         ip route get "$iscsi_target_ip" >/dev/null 2>&1 || return 0
 120     fi
 121
 122     #limit iscsistart login retries
 123     case "$iscsi_param" in
 124         *node.session.initial_login_retry_max*) ;;
 125         *)
 126             retries=$(getargnum 3 0 10000 rd.iscsi.login_retry_max)
 127             if [ $retries -gt 0 ]; then
 128                 iscsi_param="${iscsi_param% } node.session.initial_login_retry_max=$retries"
 129             fi
 130         ;;
 131     esac
 132
 133 # XXX is this needed?
 134     getarg ro && iscsirw=ro
 135     getarg rw && iscsirw=rw
 136     fsopts=${fsopts:+$fsopts,}${iscsirw}
 137
 138     if [ -z "$iscsi_initiator" ] && [ -f /sys/firmware/ibft/initiator/initiator-name ] && ! [ -f /tmp/iscsi_set_initiator ]; then
 139            iscsi_initiator=$(while read line || [ -n "$line" ]; do echo $line;done < /sys/firmware/ibft/initiator/initiator-name)
 140            echo "InitiatorName=$iscsi_initiator" > /run/initiatorname.iscsi
 141            rm -f /etc/iscsi/initiatorname.iscsi
 142            mkdir -p /etc/iscsi
 143            ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi
 144            > /tmp/iscsi_set_initiator
 145            if [ -n "$DRACUT_SYSTEMD" ]; then
 146                systemctl try-restart iscsid
 147                # FIXME: iscsid is not yet ready, when the service is :-/
 148                sleep 1
 149            fi
 150     fi
 151
 152     if [ -z "$iscsi_initiator" ]; then
 153         [ -f /run/initiatorname.iscsi ] && . /run/initiatorname.iscsi
 154         [ -f /etc/initiatorname.iscsi ] && . /etc/initiatorname.iscsi
 155         [ -f /etc/iscsi/initiatorname.iscsi ] && . /etc/iscsi/initiatorname.iscsi
 156         iscsi_initiator=$InitiatorName
 157     fi
 158
 159     if [ -z "$iscsi_initiator" ]; then
 160         iscsi_initiator=$(iscsi-iname)
 161         echo "InitiatorName=$iscsi_initiator" > /run/initiatorname.iscsi
 162         rm -f /etc/iscsi/initiatorname.iscsi
 163         mkdir -p /etc/iscsi
 164         ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi
 165         > /tmp/iscsi_set_initiator
 166         if [ -n "$DRACUT_SYSTEMD" ]; then
 167             systemctl try-restart iscsid
 168             # FIXME: iscsid is not yet ready, when the service is :-/
 169             sleep 1
 170         fi
 171     fi
 172
 173
 174     if [ -z "$iscsi_target_port" ]; then
 175         iscsi_target_port=3260
 176     fi
 177
 178     if [ -z "$iscsi_target_group" ]; then
 179         iscsi_target_group=1
 180     fi
 181
 182     if [ -z "$iscsi_lun" ]; then
 183         iscsi_lun=0
 184     fi
 185
 186     echo "InitiatorName=$iscsi_initiator" > /run/initiatorname.iscsi
 187     ln -fs /run/initiatorname.iscsi /dev/.initiatorname.iscsi
 188     if ! [ -e /etc/iscsi/initiatorname.iscsi ]; then
 189         mkdir -p /etc/iscsi
 190         ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi
 191         if [ -n "$DRACUT_SYSTEMD" ]; then
 192             systemctl try-restart iscsid
 193             # FIXME: iscsid is not yet ready, when the service is :-/
 194             sleep 1
 195         fi
 196     fi
 197 # FIXME $iscsi_protocol??
 198
 199     if [ "$root" = "dhcp" ] || [ "$netroot" = "dhcp" ]; then
 200         # if root is not specified try to mount the whole iSCSI LUN
 201         printf 'SYMLINK=="disk/by-path/*-iscsi-*-%s", SYMLINK+="root"\n' "$iscsi_lun" >> /etc/udev/rules.d/99-iscsi-root.rules
 202         udevadm control --reload
 203         write_fs_tab /dev/root
 204         wait_for_dev -n /dev/root
 205
 206         # install mount script
 207         [ -z "$DRACUT_SYSTEMD" ] && \
 208             echo "iscsi_lun=$iscsi_lun . /bin/mount-lun.sh " > $hookdir/mount/01-$$-iscsi.sh
 209     fi
 210
 211     targets=$(iscsiadm -m discovery -t st -p $iscsi_target_ip:${iscsi_target_port:+$iscsi_target_port} | sed 's/^.*iqn/iqn/')
 212     [ -z "$targets" ] && echo "Target discovery to $iscsi_target_ip:${iscsi_target_port:+$iscsi_target_port} failed with status $?" && exit 1
 213
 214     for target in $iscsi_target_name; do
 215         case "$targets" in
 216         *$target*)
 217             EXTRA=""
 218             if [ -n "$iscsi_iface_name" ]; then
 219                 iscsiadm -m iface -I $iscsi_iface_name --op=new
 220                 EXTRA=" ${iscsi_netdev_name:+--name=iface.net_ifacename --value=$iscsi_netdev_name} "
 221                 EXTRA="$EXTRA ${iscsi_initiator:+--name=iface.initiatorname --value=$iscsi_initiator} "
 222             fi
 223             [ -n "$iscsi_param" ] && for param in $iscsi_param; do EXTRA="$EXTRA --name=${param%=*} --value=${param#*=}"; done
 224
 225             iscsiadm -m node -T $target \
 226                      ${iscsi_iface_name:+-I $iscsi_iface_name} \
 227                      -p $iscsi_target_ip${iscsi_target_port:+:$iscsi_target_port} \
 228                      --op=update \
 229                      --name=node.startup --value=onboot \
 230                      ${iscsi_username:+   --name=node.session.auth.username    --value=$iscsi_username} \
 231                      ${iscsi_password:+   --name=node.session.auth.password    --value=$iscsi_password} \
 232                      ${iscsi_in_username:+--name=node.session.auth.username_in --value=$iscsi_in_username} \
 233                      ${iscsi_in_password:+--name=node.session.auth.password_in --value=$iscsi_in_password} \
 234                      $EXTRA \
 235                      $NULL
 236         ;;
 237         *)
 238         ;;
 239         esac
 240     done
 241
 242     iscsiadm -m node -L onboot || :
 243     > $hookdir/initqueue/work
 244
 245     netroot_enc=$(str_replace "$1" '/' '\2f')
 246     echo 'started' > "/tmp/iscsistarted-iscsi:${netroot_enc}"
 247     return 0
 248 }
 249
 250 ret=0
 251
 252 if [ "$netif" != "timeout" ] && getargbool 0 rd.iscsi.waitnet; then
 253     all_ifaces_setup || exit 0
 254 fi
 255
 256 if [ "$netif" = "timeout" ] && all_ifaces_setup; then
 257     # s.th. went wrong and the timeout script hits
 258     # restart
 259     systemctl restart iscsid
 260     # damn iscsid is not ready after unit says it's ready
 261     sleep 2
 262 fi
 263
 264 if getargbool 0 rd.iscsi.firmware -d -y iscsi_firmware ; then
 265     if [ "$netif" = "timeout" ] || [ "$netif" = "online" ] || [ "$netif" = "dummy" ]; then
 266         [ -f /tmp/session-retry ] || echo 1 > /tmp/session-retry
 267         handle_firmware
 268         ret=$?
 269     fi
 270 fi
 271
 272 if ! [ "$netif" = "online" ]; then
 273     # loop over all netroot parameter
 274     if nroot=$(getarg netroot) && [ "$nroot" != "dhcp" ]; then
 275         for nroot in $(getargs netroot); do
 276             [ "${nroot%%:*}" = "iscsi" ] || continue
 277             nroot="${nroot##iscsi:}"
 278             if [ -n "$nroot" ]; then
 279                 handle_netroot "$nroot"
 280                 ret=$(($ret + $?))
 281             fi
 282         done
 283     else
 284         if [ -n "$iroot" ]; then
 285             handle_netroot "$iroot"
 286             ret=$?
 287         fi
 288     fi
 289 fi
 290
 291 need_shutdown
 292
 293 # now we have a root filesystem somewhere in /dev/sd*
 294 # let the normal block handler handle root=
 295 exit $ret