modules.d/95iscsi/parse-iscsiroot.sh

   1 #!/bin/sh
   2 #
   3 # Preferred format:
   4 #       root=iscsi:[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname>
   5 #       [root=*] netroot=iscsi:[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname>
   6 #
   7 # Legacy formats:
   8 #       [net]root=[iscsi] iscsiroot=[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname>
   9 #       [net]root=[iscsi] iscsi_firmware
  10 #
  11 # root= takes precedence over netroot= if root=iscsi[...]
  12 #
  13
  14 # This script is sourced, so root should be set. But let's be paranoid
  15 [ -z "$root" ] && root=$(getarg root=)
  16 if [ -z "$netroot" ]; then
  17     for nroot in $(getargs netroot=); do
  18         [ "${nroot%%:*}" = "iscsi" ] && break
  19     done
  20     if [ "${nroot%%:*}" = "iscsi" ]; then
  21         netroot="$nroot"
  22     else
  23         for nroot in $(getargs netroot=); do
  24             [ "${nroot%%:*}" = "dhcp" ] && break
  25         done
  26         netroot="$nroot"
  27     fi
  28 fi
  29 [ -z "$iscsiroot" ] && iscsiroot=$(getarg iscsiroot=)
  30 [ -z "$iscsi_firmware" ] && getargbool 0 rd.iscsi.firmware -y iscsi_firmware && iscsi_firmware="1"
  31
  32 [ -n "$iscsiroot" ] && [ -n "$iscsi_firmware" ] && die "Mixing iscsiroot and iscsi_firmware is dangerous"
  33
  34 type write_fs_tab >/dev/null 2>&1 || . /lib/fs-lib.sh
  35
  36 # Root takes precedence over netroot
  37 if [ "${root%%:*}" = "iscsi" ] ; then
  38     if [ -n "$netroot" ] ; then
  39         echo "Warning: root takes precedence over netroot. Ignoring netroot"
  40     fi
  41     netroot=$root
  42     # if root is not specified try to mount the whole iSCSI LUN
  43     printf 'ENV{DEVTYPE}!="partition", SYMLINK=="disk/by-path/*-iscsi-*-*", SYMLINK+="root"\n' >> /etc/udev/rules.d/99-iscsi-root.rules
  44     [ -n "$DRACUT_SYSTEMD" ] && systemctl is-active systemd-udevd && udevadm control --reload-rules
  45     root=/dev/root
  46
  47     write_fs_tab /dev/root
  48 fi
  49
  50 # If it's not empty or iscsi we don't continue
  51 for nroot in $(getargs netroot); do
  52     [ "${nroot%%:*}" = "iscsi" ] || continue
  53     netroot="$nroot"
  54     break
  55 done
  56
  57 # Root takes precedence over netroot
  58 if [ "${root}" = "/dev/root" ] && getarg "netroot=dhcp" ; then
  59     # if root is not specified try to mount the whole iSCSI LUN
  60     printf 'ENV{DEVTYPE}!="partition", SYMLINK=="disk/by-path/*-iscsi-*-*", SYMLINK+="root"\n' >> /etc/udev/rules.d/99-iscsi-root.rules
  61     [ -n "$DRACUT_SYSTEMD" ] && systemctl is-active systemd-udevd && udevadm control --reload-rules
  62 fi
  63
  64 if [ -n "$iscsiroot" ] ; then
  65     [ -z "$netroot" ]  && netroot=$root
  66
  67     # @deprecated
  68     echo "Warning: Argument iscsiroot is deprecated and might be removed in a future"
  69     echo "release. See 'man dracut.kernel' for more information."
  70
  71     # Accept iscsiroot argument?
  72     [ -z "$netroot" ] || [ "$netroot" = "iscsi" ] || \
  73         die "Argument iscsiroot only accepted for empty root= or [net]root=iscsi"
  74
  75     # Override root with iscsiroot content?
  76     [ -z "$netroot" ] || [ "$netroot" = "iscsi" ] && netroot=iscsi:$iscsiroot
  77 fi
  78
  79 # iscsi_firmware does not need argument checking
  80 if [ -n "$iscsi_firmware" ]; then
  81     if [ "$root" != "dhcp" ] && [ "$netroot" != "dhcp" ]; then
  82         [ -z "$netroot" ] && netroot=iscsi:
  83     fi
  84     modprobe -b -q iscsi_boot_sysfs 2>/dev/null
  85     modprobe -b -q iscsi_ibft
  86     # if no ip= is given, but firmware
  87     echo "[ -f '/tmp/iscsistarted-firmware' ]" > $hookdir/initqueue/finished/iscsi_started.sh
  88     initqueue --unique --online /sbin/iscsiroot online "iscsi:" "$NEWROOT"
  89     initqueue --unique --onetime --timeout /sbin/iscsiroot timeout "iscsi:" "$NEWROOT"
  90     initqueue --unique --onetime --settled /sbin/iscsiroot online "iscsi:" "'$NEWROOT'"
  91 fi
  92
  93 # ISCSI actually supported?
  94 if ! [ -e /sys/module/iscsi_tcp ]; then
  95     modprobe -b -q iscsi_tcp || die "iscsiroot requested but kernel/initrd does not support iscsi"
  96 fi
  97
  98 modprobe --all -b -q qla4xxx cxgb3i cxgb4i bnx2i be2iscsi
  99
 100 if [ -n "$netroot" ] && [ "$root" != "/dev/root" ] && [ "$root" != "dhcp" ]; then
 101     if ! getargbool 1 rd.neednet >/dev/null || ! getarg "ip="; then
 102         initqueue --unique --onetime --settled /sbin/iscsiroot dummy "'$netroot'" "'$NEWROOT'"
 103     fi
 104 fi
 105
 106 if arg=$(getarg rd.iscsi.initiator -d iscsi_initiator=) && [ -n "$arg" ] && ! [ -f /run/initiatorname.iscsi ] ; then
 107     iscsi_initiator=$arg
 108     echo "InitiatorName=$iscsi_initiator" > /run/initiatorname.iscsi
 109     ln -fs /run/initiatorname.iscsi /dev/.initiatorname.iscsi
 110     if ! [ -e /etc/iscsi/initiatorname.iscsi ]; then
 111         mkdir -p /etc/iscsi
 112         ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi
 113         if [ -n "$DRACUT_SYSTEMD" ]; then
 114             systemctl try-restart iscsid
 115             # FIXME: iscsid is not yet ready, when the service is :-/
 116             sleep 1
 117         fi
 118     fi
 119 fi
 120
 121 # If not given on the cmdline and initiator-name available via iBFT
 122 if [ -z $iscsi_initiator ] && [ -f /sys/firmware/ibft/initiator/initiator-name ] && ! [ -f /tmp/iscsi_set_initiator ]; then
 123     iscsi_initiator=$(while read line || [ -n "$line" ]; do echo $line;done < /sys/firmware/ibft/initiator/initiator-name)
 124     if [ -n "$iscsi_initiator" ]; then
 125         echo "InitiatorName=$iscsi_initiator" > /run/initiatorname.iscsi
 126         rm -f /etc/iscsi/initiatorname.iscsi
 127         mkdir -p /etc/iscsi
 128         ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi
 129         > /tmp/iscsi_set_initiator
 130         if [ -n "$DRACUT_SYSTEMD" ]; then
 131             systemctl try-restart iscsid
 132             # FIXME: iscsid is not yet ready, when the service is :-/
 133             sleep 1
 134         fi
 135     fi
 136 fi
 137
 138 if [ -z "$netroot" ] || ! [ "${netroot%%:*}" = "iscsi" ]; then
 139     return 1
 140 fi
 141
 142 initqueue --unique --onetime --timeout /sbin/iscsiroot timeout "$netroot" "$NEWROOT"
 143
 144 for nroot in $(getargs netroot); do
 145     [ "${nroot%%:*}" = "iscsi" ] || continue
 146     type parse_iscsi_root >/dev/null 2>&1 || . /lib/net-lib.sh
 147     parse_iscsi_root "$nroot" || return 1
 148     netroot_enc=$(str_replace "$nroot" '/' '\2f')
 149     echo "[ -f '/tmp/iscsistarted-$netroot_enc' ]" > $hookdir/initqueue/finished/iscsi_started.sh
 150 done
 151
 152 # Done, all good!
 153 rootok=1
 154
 155 # Shut up init error check
 156 [ -z "$root" ] && root="iscsi"