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iscsiroot.sh

#!/usr/bin/sh # # This implementation is incomplete: Discovery mode is not implemented and # the argument handling doesn't follow currently agreed formats. This is mainly # because rfc4173 does not say anything about iscsi_initiator but open-iscsi's # iscsistart needs this. # type getarg > /dev/null 2>&1 || . /lib/dracut-lib.sh type parse_iscsi_root > /dev/null 2>&1 || . /lib/net-lib.sh type write_fs_tab > /dev/null 2>&1 || . /lib/fs-lib.sh PATH=/usr/sbin:/usr/bin:/sbin:/bin # Huh? Empty $1? [ -z "$1" ] && exit 1 # Huh? Empty $2? [ -z "$2" ] && exit 1 # Huh? Empty $3? This isn't really necessary, since NEWROOT isn't # used here. But let's be consistent [ -z "$3" ] && exit 1 # root is in the form root=iscsi:[<servername>]:[<protocol>]:[<port>]:[<LUN>]:<targetname> netif="$1" iroot="$2" # If it's not iscsi we don't continue [ "${iroot%%:*}" = "iscsi" ] || exit 1 iroot=${iroot#iscsi} iroot=${iroot#:} # XXX modprobe crc32c should go in the cmdline parser, but I haven't yet # figured out a way how to check whether this is built-in or not modprobe crc32c 2> /dev/null # start iscsiuio if needed if [ -z "${DRACUT_SYSTEMD}" ] \ && { [ -e /sys/module/bnx2i ] || [ -e /sys/module/qedi ]; } \ && ! [ -e /tmp/iscsiuio-started ]; then iscsiuio : > /tmp/iscsiuio-started fi handle_firmware() { local ifaces retry _res # Depending on the 'ql4xdisablesysfsboot' qla4xxx # will be autostarting sessions without presenting # them via the firmware interface. # In these cases 'iscsiadm -m fw' will fail, but # the iSCSI sessions will still be present. if ! iscsiadm -m fw; then warn "iscsiadm: Could not get list of targets from firmware." else ifaces=$( set -- /sys/firmware/ibft/ethernet* echo $# ) retry=$(cat /tmp/session-retry) if [ "$retry" -lt "$ifaces" ]; then retry=$((retry + 1)) echo $retry > /tmp/session-retry return 1 else rm /tmp/session-retry fi # check to see if we have the new iscsiadm command, # that supports the "no-wait" (-W) flag. If so, use it. iscsiadm -m fw -l -W 2> /dev/null _res=$? if [ $_res -eq 7 ]; then # ISCSI_ERR_INVALID (7) => "-W" not supported info "iscsiadm does not support no-wait firmware logins" iscsiadm -m fw -l _res=$? fi if [ $_res -ne 0 ]; then warn "iscsiadm: Log-in to iscsi target failed" else need_shutdown fi fi [ -d /sys/class/iscsi_session ] || return 1 echo 'started' > "/tmp/iscsistarted-iscsi:" echo 'started' > "/tmp/iscsistarted-firmware" return 0 } handle_netroot() { local iscsi_initiator iscsi_target_name iscsi_target_ip iscsi_target_port local iscsi_target_group iscsirw iscsi_lun local iscsi_username iscsi_password local iscsi_in_username iscsi_in_password local iscsi_iface_name iscsi_netdev_name local iscsi_param param local p found local login_retry_max_seen= # override conf settings by command line options arg=$(getarg rd.iscsi.initiator -d iscsi_initiator=) [ -n "$arg" ] && iscsi_initiator=$arg arg=$(getarg rd.iscsi.target.group -d iscsi_target_group=) [ -n "$arg" ] && iscsi_target_group=$arg arg=$(getarg rd.iscsi.username -d iscsi_username=) [ -n "$arg" ] && iscsi_username=$arg arg=$(getarg rd.iscsi.password -d iscsi_password) [ -n "$arg" ] && iscsi_password=$arg arg=$(getarg rd.iscsi.in.username -d iscsi_in_username=) [ -n "$arg" ] && iscsi_in_username=$arg arg=$(getarg rd.iscsi.in.password -d iscsi_in_password=) [ -n "$arg" ] && iscsi_in_password=$arg for p in $(getargs rd.iscsi.param -d iscsi_param); do [ "${p%=*}" = node.session.initial_login_retry_max ] \ && login_retry_max_seen=yes iscsi_param="$iscsi_param $p" done # this sets iscsi_target_name and possibly overwrites most # parameters read from the command line above parse_iscsi_root "$1" || return 1 # Bail out early, if there is no route to the destination if is_ip "$iscsi_target_ip" && [ "$netif" != "timeout" ] && ! all_ifaces_setup && getargbool 1 rd.iscsi.testroute; then ip route get "$iscsi_target_ip" > /dev/null 2>&1 || return 0 fi #limit iscsistart login retries if [ "$login_retry_max_seen" != yes ]; then retries=$(getargnum 3 0 10000 rd.iscsi.login_retry_max) if [ "$retries" -gt 0 ]; then iscsi_param="${iscsi_param% } node.session.initial_login_retry_max=$retries" fi fi # XXX is this needed? getarg ro && iscsirw=ro getarg rw && iscsirw=rw fsopts=${fsopts:+$fsopts,}${iscsirw} if [ -z "$iscsi_initiator" ] && [ -f /sys/firmware/ibft/initiator/initiator-name ] && ! [ -f /tmp/iscsi_set_initiator ]; then iscsi_initiator=$(while read -r line || [ -n "$line" ]; do echo "$line"; done < /sys/firmware/ibft/initiator/initiator-name) printf 'InitiatorName=%q\n' "$iscsi_initiator" > /run/initiatorname.iscsi rm -f /etc/iscsi/initiatorname.iscsi mkdir -p /etc/iscsi ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi : > /tmp/iscsi_set_initiator if [ -n "$DRACUT_SYSTEMD" ]; then systemctl try-restart iscsid # FIXME: iscsid is not yet ready, when the service is :-/ sleep 1 fi fi if [ -z "$iscsi_initiator" ]; then [ -f /run/initiatorname.iscsi ] && . /run/initiatorname.iscsi [ -f /etc/initiatorname.iscsi ] && . /etc/initiatorname.iscsi [ -f /etc/iscsi/initiatorname.iscsi ] && . /etc/iscsi/initiatorname.iscsi iscsi_initiator=$InitiatorName fi if [ -z "$iscsi_initiator" ]; then iscsi_initiator=$(iscsi-iname) printf 'InitiatorName=%q\n' "$iscsi_initiator" > /run/initiatorname.iscsi rm -f /etc/iscsi/initiatorname.iscsi mkdir -p /etc/iscsi ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi : > /tmp/iscsi_set_initiator if [ -n "$DRACUT_SYSTEMD" ]; then systemctl try-restart iscsid # FIXME: iscsid is not yet ready, when the service is :-/ sleep 1 fi fi if [ -z "$iscsi_target_port" ]; then iscsi_target_port=3260 fi if [ -z "$iscsi_target_group" ]; then iscsi_target_group=1 fi if [ -z "$iscsi_lun" ]; then iscsi_lun=0 fi printf 'InitiatorName=%q\n' "$iscsi_initiator" > /run/initiatorname.iscsi ln -fs /run/initiatorname.iscsi /dev/.initiatorname.iscsi if ! [ -e /etc/iscsi/initiatorname.iscsi ]; then mkdir -p /etc/iscsi ln -fs /run/initiatorname.iscsi /etc/iscsi/initiatorname.iscsi if [ -n "$DRACUT_SYSTEMD" ]; then systemctl try-restart iscsid # FIXME: iscsid is not yet ready, when the service is :-/ sleep 1 fi fi if [ -z "$DRACUT_SYSTEMD" ]; then iscsid sleep 2 fi # FIXME $iscsi_protocol?? if [ "$root" = "dhcp" ] || [ "$netroot" = "dhcp" ]; then # if root is not specified try to mount the whole iSCSI LUN printf 'SYMLINK=="disk/by-path/*-iscsi-*-%s", SYMLINK+="root"\n' "$(printf '%s' "$iscsi_lun" | tr -d '"')" >> /etc/udev/rules.d/99-iscsi-root.rules udevadm control --reload write_fs_tab /dev/root wait_for_dev -n /dev/root # install mount script [ -z "$DRACUT_SYSTEMD" ] \ && printf 'iscsi_lun=%q . /bin/mount-lun.sh\n' "$iscsi_lun" > "$hookdir"/mount/01-$$-iscsi.sh fi if strglobin "$iscsi_target_ip" '*:*:*' && ! strglobin "$iscsi_target_ip" '['; then iscsi_target_ip="[$iscsi_target_ip]" fi targets=$(iscsiadm -m discovery -t st -p "$iscsi_target_ip":${iscsi_target_port:+$iscsi_target_port} | { while read -r _ target _ || [ -n "$target" ]; do echo "$target" done }) [ -z "$targets" ] && warn "Target discovery to $iscsi_target_ip:${iscsi_target_port:+$iscsi_target_port} failed with status $?" && return 1 found= for target in $targets; do if [ "$target" = "$iscsi_target_name" ]; then if [ -n "$iscsi_iface_name" ]; then iscsiadm -m iface -I "$iscsi_iface_name" --op=new EXTRA=" ${iscsi_netdev_name:+--name=iface.net_ifacename --value=$iscsi_netdev_name} " EXTRA="$EXTRA ${iscsi_initiator:+--name=iface.initiatorname --value=$iscsi_initiator} " fi [ -n "$iscsi_param" ] && for param in $iscsi_param; do EXTRA="$EXTRA --name=${param%=*} --value=${param#*=}"; done CMD="iscsiadm -m node -T $target \ ${iscsi_iface_name:+-I $iscsi_iface_name} \ -p $iscsi_target_ip${iscsi_target_port:+:$iscsi_target_port}" __op="--op=update \ --name=node.startup --value=onboot \ ${iscsi_username:+ --name=node.session.auth.username --value=$iscsi_username} \ ${iscsi_password:+ --name=node.session.auth.password --value=$iscsi_password} \ ${iscsi_in_username:+--name=node.session.auth.username_in --value=$iscsi_in_username} \ ${iscsi_in_password:+--name=node.session.auth.password_in --value=$iscsi_in_password} \ $EXTRA" # shellcheck disable=SC2086 $CMD $__op if [ "$netif" != "timeout" ]; then $CMD --login fi found=yes break fi done if [ "$netif" = "timeout" ]; then iscsiadm -m node -L onboot || : elif [ "$found" != yes ]; then warn "iSCSI target \"$iscsi_target_name\" not found on portal $iscsi_target_ip:$iscsi_target_port" return 1 fi : > "$hookdir"/initqueue/work netroot_enc=$(str_replace "$1" '/' '\2f') echo 'started' > "/tmp/iscsistarted-iscsi:${netroot_enc}" return 0 } ret=0 if [ "$netif" != "timeout" ] && getargbool 0 rd.iscsi.waitnet; then all_ifaces_setup || exit 0 fi if [ "$netif" = "timeout" ] && all_ifaces_setup; then # s.th. went wrong and the timeout script hits # restart systemctl restart iscsid # damn iscsid is not ready after unit says it's ready sleep 2 fi if getargbool 0 rd.iscsi.firmware -d -y iscsi_firmware; then if [ "$netif" = "timeout" ] || [ "$netif" = "online" ] || [ "$netif" = "dummy" ]; then [ -f /tmp/session-retry ] || echo 1 > /tmp/session-retry handle_firmware ret=$? fi fi if ! [ "$netif" = "online" ]; then # loop over all netroot parameter if nroot=$(getarg netroot) && [ "$nroot" != "dhcp" ]; then for nroot in $(getargs netroot); do [ "${nroot%%:*}" = "iscsi" ] || continue nroot="${nroot##iscsi:}" if [ -n "$nroot" ]; then handle_netroot "$nroot" ret=$((ret + $?)) fi done else if [ -n "$iroot" ]; then handle_netroot "$iroot" ret=$? fi fi fi need_shutdown # now we have a root filesystem somewhere in /dev/sd* # let the normal block handler handle root= exit $ret

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docroot: /home/induvedam/public_html

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curdir: /lib/dracut/modules.d/95iscsi

	.		119
	..		4096
X	cleanup-iscsi.sh		136
X	iscsiroot.sh		11426
X	module-setup.sh		9488
X	mount-lun.sh		348
X	parse-iscsiroot.sh		6155