modules.d/95iscsi/module-setup.sh

   1 #!/bin/bash
   2
   3 # called by dracut
   4 check() {
   5     local _rootdev
   6     # If our prerequisites are not met, fail anyways.
   7     require_binaries iscsi-iname iscsiadm iscsid || return 1
   8
   9     # If hostonly was requested, fail the check if we are not actually
  10     # booting from root.
  11
  12     is_iscsi() {
  13         local _dev=$1
  14
  15         [[ -L "/sys/dev/block/$_dev" ]] || return
  16         cd "$(readlink -f "/sys/dev/block/$_dev")"
  17         until [[ -d sys || -d iscsi_session ]]; do
  18             cd ..
  19         done
  20         [[ -d iscsi_session ]]
  21     }
  22
  23     [[ $hostonly ]] || [[ $mount_needs ]] && {
  24         pushd . >/dev/null
  25         for_each_host_dev_and_slaves is_iscsi
  26         local _is_iscsi=$?
  27         popd >/dev/null
  28         [[ $_is_iscsi == 0 ]] || return 255
  29     }
  30     return 0
  31 }
  32
  33 get_ibft_mod() {
  34     local ibft_mac=$1
  35     local iface_mac iface_mod
  36     # Return the iSCSI offload module for a given MAC address
  37     for iface_desc in $(iscsiadm -m iface | cut -f 2 -d ' '); do
  38         iface_mod=${iface_desc%%,*}
  39         iface_mac=${iface_desc#*,}
  40         iface_mac=${iface_mac%%,*}
  41         if [ "$ibft_mac" = "$iface_mac" ] ; then
  42             echo $iface_mod
  43             return 0
  44         fi
  45     done
  46 }
  47
  48 install_ibft() {
  49     # When iBFT / iscsi_boot is detected:
  50     # - Use 'ip=ibft' to set up iBFT network interface
  51     #   Note: bnx2i is using a different MAC address of iSCSI offloading
  52     #         so the 'ip=ibft' parameter must not be set
  53     # - specify firmware booting cmdline parameter
  54
  55     for d in /sys/firmware/* ; do
  56         if [ -d ${d}/ethernet0 ] ; then
  57             read ibft_mac < ${d}/ethernet0/mac
  58             ibft_mod=$(get_ibft_mod $ibft_mac)
  59         fi
  60         if [ -z "$ibft_mod" ] && [ -d ${d}/ethernet1 ] ; then
  61             read ibft_mac < ${d}/ethernet1/mac
  62             ibft_mod=$(get_ibft_mod $ibft_mac)
  63         fi
  64         if [ -d ${d}/initiator ] ; then
  65             if [ ${d##*/} = "ibft" ] && [ "$ibft_mod" != "bnx2i" ] ; then
  66                 echo -n "rd.iscsi.ibft=1 "
  67             fi
  68             echo -n "rd.iscsi.firmware=1"
  69         fi
  70     done
  71 }
  72
  73 install_iscsiroot() {
  74     local devpath=$1
  75     local scsi_path iscsi_lun session c d conn host flash
  76     local iscsi_session iscsi_address iscsi_port iscsi_targetname iscsi_tpgt
  77
  78     scsi_path=${devpath%%/block*}
  79     [ "$scsi_path" = "$devpath" ] && return 1
  80     iscsi_lun=${scsi_path##*:}
  81     [ "$iscsi_lun" = "$scsi_path" ] && return 1
  82     session=${devpath%%/target*}
  83     [ "$session" = "$devpath" ] && return 1
  84     iscsi_session=${session##*/}
  85     [ "$iscsi_session" = "$session" ] && return 1
  86     host=${session%%/session*}
  87     [ "$host" = "$session" ] && return 1
  88     iscsi_host=${host##*/}
  89
  90     for flash in ${host}/flashnode_sess-* ; do
  91         [ ! -e "$flash/is_boot_target" ] && continue
  92         is_boot=$(cat $flash/is_boot_target)
  93         if [ $is_boot -eq 1 ] ; then
  94             # qla4xxx flashnode session; skip iBFT discovery
  95             iscsi_initiator=$(cat /sys/class/iscsi_host/${iscsi_host}/initiatorname)
  96             echo "rd.iscsi.initiator=${iscsi_initiator}"
  97             return;
  98         fi
  99     done
 100
 101     for d in ${session}/* ; do
 102         case $d in
 103             *connection*)
 104                 c=${d##*/}
 105                 conn=${d}/iscsi_connection/${c}
 106                 if [ -d ${conn} ] ; then
 107                     iscsi_address=$(cat ${conn}/persistent_address)
 108                     iscsi_port=$(cat ${conn}/persistent_port)
 109                 fi
 110                 ;;
 111             *session)
 112                 if [ -d ${d}/${iscsi_session} ] ; then
 113                     iscsi_initiator=$(cat ${d}/${iscsi_session}/initiatorname)
 114                     iscsi_targetname=$(cat ${d}/${iscsi_session}/targetname)
 115                 fi
 116                 ;;
 117         esac
 118     done
 119
 120     [ -z "$iscsi_address" ] && return
 121     local_address=$(ip -o route get to $iscsi_address | sed -n 's/.*src \([0-9a-f.:]*\).*/\1/p')
 122     ifname=$(ip -o route get to $iscsi_address | sed -n 's/.*dev \([^ ]*\).*/\1/p')
 123
 124     #follow ifcfg settings for boot protocol
 125     bootproto=$(sed -n "/BOOTPROTO/s/BOOTPROTO='\([[:alpha:]]*6\?\)4\?'/\1/p" /etc/sysconfig/network/ifcfg-$ifname)
 126     if [ $bootproto ]; then
 127         printf 'ip=%s:%s ' ${ifname} ${bootproto}
 128     else
 129         printf 'ip=%s:static ' ${ifname}
 130     fi
 131
 132     if [ -e /sys/class/net/$ifname/address ] ; then
 133         ifmac=$(cat /sys/class/net/$ifname/address)
 134         printf 'ifname=%s:%s ' ${ifname} ${ifmac}
 135     fi
 136
 137     if [ -n "$iscsi_address" -a -n "$iscsi_targetname" ] ; then
 138         if [ -n "$iscsi_port" -a "$iscsi_port" -eq 3260 ] ; then
 139             iscsi_port=
 140         fi
 141         if [ -n "$iscsi_lun" -a "$iscsi_lun" -eq 0 ] ; then
 142             iscsi_lun=
 143         fi
 144         # In IPv6 case rd.iscsi.initatior= must pass address in [] brackets
 145         case "$iscsi_address" in
 146             *:*)
 147                 iscsi_address="[$iscsi_address]"
 148                 ;;
 149         esac
 150         # Must be two separate lines, so that "sort | uniq" commands later
 151         # can sort out rd.iscsi.initiator= duplicates
 152         echo "rd.iscsi.initiator=${iscsi_initiator}"
 153         echo "netroot=iscsi:${iscsi_address}::${iscsi_port}:${iscsi_lun}:${iscsi_targetname}"
 154         echo "rd.neednet=1"
 155     fi
 156     return 0
 157 }
 158
 159
 160 install_softiscsi() {
 161     [ -d /sys/firmware/ibft ] && return 0
 162
 163     is_softiscsi() {
 164         local _dev=$1
 165         local iscsi_dev
 166
 167         [[ -L "/sys/dev/block/$_dev" ]] || return
 168         iscsi_dev=$(cd -P /sys/dev/block/$_dev; echo $PWD)
 169         install_iscsiroot $iscsi_dev
 170     }
 171
 172     for_each_host_dev_and_slaves_all is_softiscsi || return 255
 173     return 0
 174 }
 175
 176 # called by dracut
 177 depends() {
 178     echo network rootfs-block
 179 }
 180
 181 # called by dracut
 182 installkernel() {
 183     local _arch=$(uname -m)
 184     local _funcs='iscsi_register_transport'
 185
 186     instmods bnx2i qla4xxx cxgb3i cxgb4i be2iscsi qedi
 187     hostonly="" instmods iscsi_tcp iscsi_ibft crc32c iscsi_boot_sysfs
 188
 189     if [ "$_arch" = "s390" -o "$_arch" = "s390x" ]; then
 190         _s390drivers="=drivers/s390/scsi"
 191     fi
 192
 193     dracut_instmods -o -s ${_funcs} =drivers/scsi ${_s390drivers:+"$_s390drivers"}
 194 }
 195
 196 # called by dracut
 197 cmdline() {
 198     local _iscsiconf=$(install_ibft)
 199     {
 200         if [ "$_iscsiconf" ] ; then
 201             echo ${_iscsiconf}
 202         else
 203             install_softiscsi
 204         fi
 205     } | sort | uniq
 206 }
 207
 208 # called by dracut
 209 install() {
 210     inst_multiple -o iscsiuio
 211     inst_libdir_file 'libgcc_s.so*'
 212     inst_multiple umount iscsi-iname iscsiadm iscsid
 213
 214     inst_multiple -o \
 215         $systemdsystemunitdir/iscsid.socket \
 216         $systemdsystemunitdir/iscsid.service \
 217         $systemdsystemunitdir/iscsiuio.service \
 218         $systemdsystemunitdir/iscsiuio.socket \
 219         $systemdsystemunitdir/sockets.target.wants/iscsid.socket \
 220         $systemdsystemunitdir/sockets.target.wants/iscsiuio.socket
 221
 222     if [[ $hostonly ]]; then
 223         inst_dir $(/usr/bin/find /etc/iscsi)
 224     else
 225         inst_simple /etc/iscsi/iscsid.conf
 226     fi
 227
 228     # Detect iBFT and perform mandatory steps
 229     if [[ $hostonly_cmdline == "yes" ]] ; then
 230         local _iscsiconf=$(cmdline)
 231         [[ $_iscsiconf ]] && printf "%s\n" "$_iscsiconf" >> "${initdir}/etc/cmdline.d/95iscsi.conf"
 232     fi
 233
 234     inst_hook cmdline 90 "$moddir/parse-iscsiroot.sh"
 235     inst_hook cleanup 90 "$moddir/cleanup-iscsi.sh"
 236     inst "$moddir/iscsiroot.sh" "/sbin/iscsiroot"
 237     if ! dracut_module_included "systemd"; then
 238         inst "$moddir/mount-lun.sh" "/bin/mount-lun.sh"
 239     else
 240         inst_multiple -o \
 241                       $systemdsystemunitdir/iscsi.service \
 242                       $systemdsystemunitdir/iscsid.service \
 243                       $systemdsystemunitdir/iscsid.socket \
 244                       $systemdsystemunitdir/iscsiuio.service \
 245                       $systemdsystemunitdir/iscsiuio.socket \
 246                       iscsiadm iscsid
 247
 248         mkdir -p "${initdir}/$systemdsystemunitdir/sockets.target.wants"
 249         for i in \
 250                 iscsid.socket \
 251                 iscsiuio.socket \
 252             ; do
 253             ln_r "$systemdsystemunitdir/${i}" "$systemdsystemunitdir/sockets.target.wants/${i}"
 254         done
 255
 256         mkdir -p "${initdir}/$systemdsystemunitdir/basic.target.wants"
 257         for i in \
 258                 iscsid.service \
 259                 iscsiuio.service \
 260             ; do
 261             ln_r "$systemdsystemunitdir/${i}" "$systemdsystemunitdir/basic.target.wants/${i}"
 262         done
 263
 264         # Make sure iscsid is started after dracut-cmdline and ready for the initqueue
 265         mkdir -p "${initdir}/$systemdsystemunitdir/iscsid.service.d"
 266         (
 267             echo "[Unit]"
 268             echo "After=dracut-cmdline.service"
 269             echo "Before=dracut-initqueue.service"
 270         ) > "${initdir}/$systemdsystemunitdir/iscsid.service.d/dracut.conf"
 271
 272         # The iscsi deamon does not need to wait for any storage inside initrd
 273         mkdir -p "${initdir}/$systemdsystemunitdir/iscsid.socket.d"
 274         (
 275             echo "[Unit]"
 276             echo "DefaultDependencies=no"
 277             echo "Conflicts=shutdown.target"
 278             echo "Before=shutdown.target sockets.target"
 279         ) > "${initdir}/$systemdsystemunitdir/iscsid.socket.d/dracut.conf"
 280         mkdir -p "${initdir}/$systemdsystemunitdir/iscsiuio.socket.d"
 281         (
 282             echo "[Unit]"
 283             echo "DefaultDependencies=no"
 284             echo "Conflicts=shutdown.target"
 285             echo "Before=shutdown.target sockets.target"
 286         ) > "${initdir}/$systemdsystemunitdir/iscsiuio.socket.d/dracut.conf"
 287
 288     fi
 289     inst_dir /var/lib/iscsi
 290     dracut_need_initqueue
 291 }