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145 lines
3.4 KiB
145 lines
3.4 KiB
#!/bin/sh |
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type getarg > /dev/null 2>&1 || . /lib/dracut-lib.sh |
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PATH=/usr/sbin:/usr/bin:/sbin:/bin |
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# Huh? Empty $1? |
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[ -z "$1" ] && exit 1 |
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# Huh? Empty $2? |
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[ -z "$2" ] && exit 1 |
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# Huh? Empty $3? |
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[ -z "$3" ] && exit 1 |
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# root is in the form root=nbd:srv:port[:fstype[:rootflags[:nbdopts]]] |
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# shellcheck disable=SC2034 |
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netif="$1" |
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nroot="$2" |
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NEWROOT="$3" |
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# If it's not nbd we don't continue |
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[ "${nroot%%:*}" = "nbd" ] || return |
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nroot=${nroot#nbd:} |
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nbdserver=${nroot%%:*} |
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if [ "${nbdserver%"${nbdserver#?}"}" = "[" ]; then |
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nbdserver=${nroot#[} |
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nbdserver=${nbdserver%%]:*} |
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nroot=${nroot#*]:} |
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else |
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nroot=${nroot#*:} |
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fi |
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nbdport=${nroot%%:*} |
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nroot=${nroot#*:} |
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nbdfstype=${nroot%%:*} |
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nroot=${nroot#*:} |
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nbdflags=${nroot%%:*} |
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nbdopts=${nroot#*:} |
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if [ "$nbdopts" = "$nbdflags" ]; then |
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unset nbdopts |
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fi |
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if [ "$nbdflags" = "$nbdfstype" ]; then |
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unset nbdflags |
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fi |
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if [ "$nbdfstype" = "$nbdport" ]; then |
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unset nbdfstype |
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fi |
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if [ -z "$nbdfstype" ]; then |
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nbdfstype=auto |
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fi |
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# look through the NBD options and pull out the ones that need to |
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# go before the host etc. Append a ',' so we know we terminate the loop |
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nbdopts=${nbdopts}, |
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while [ -n "$nbdopts" ]; do |
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f=${nbdopts%%,*} |
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nbdopts=${nbdopts#*,} |
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if [ -z "$f" ]; then |
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break |
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fi |
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if [ -z "${f%bs=*}" -o -z "${f%timeout=*}" ]; then |
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preopts="$preopts $f" |
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continue |
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fi |
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opts="$opts $f" |
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done |
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# look through the flags and see if any are overridden by the command line |
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nbdflags=${nbdflags}, |
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while [ -n "$nbdflags" ]; do |
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f=${nbdflags%%,*} |
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nbdflags=${nbdflags#*,} |
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if [ -z "$f" ]; then |
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break |
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fi |
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if [ "$f" = "ro" -o "$f" = "rw" ]; then |
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nbdrw=$f |
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continue |
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fi |
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fsopts=${fsopts:+$fsopts,}$f |
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done |
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getarg ro && nbdrw=ro |
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getarg rw && nbdrw=rw |
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fsopts=${fsopts:+$fsopts,}${nbdrw} |
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# XXX better way to wait for the device to be made? |
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i=0 |
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while [ ! -b /dev/nbd0 ]; do |
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[ $i -ge 20 ] && exit 1 |
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udevadm settle --exit-if-exists=/dev/nbd0 |
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i=$((i + 1)) |
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done |
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# If we didn't get a root= on the command line, then we need to |
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# add the udev rules for mounting the nbd0 device |
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if [ "$root" = "block:/dev/root" -o "$root" = "dhcp" ]; then |
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printf 'KERNEL=="nbd0", ENV{DEVTYPE}!="partition", ENV{ID_FS_TYPE}=="?*", SYMLINK+="root"\n' > /etc/udev/rules.d/99-nbd-root.rules |
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udevadm control --reload |
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wait_for_dev -n /dev/root |
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if [ -z "$DRACUT_SYSTEMD" ]; then |
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type write_fs_tab > /dev/null 2>&1 || . /lib/fs-lib.sh |
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write_fs_tab /dev/root "$nbdfstype" "$fsopts" |
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printf '/bin/mount %s\n' \ |
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"$NEWROOT" \ |
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> "$hookdir"/mount/01-$$-nbd.sh |
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else |
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mkdir -p /run/systemd/system/sysroot.mount.d |
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cat << EOF > /run/systemd/system/sysroot.mount.d/dhcp.conf |
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[Mount] |
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Where=/sysroot |
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What=/dev/root |
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Type=$nbdfstype |
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Options=$fsopts |
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EOF |
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systemctl --no-block daemon-reload |
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fi |
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# if we're on systemd, use the nbd-generator script |
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# to create the /sysroot mount. |
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fi |
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# supported since nbd 3.8 via 77e97612 |
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if strstr "$(nbd-client --help 2>&1)" "systemd-mark"; then |
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preopts="-systemd-mark $preopts" |
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fi |
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if ! [ "$nbdport" -gt 0 ] 2> /dev/null; then |
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nbdport="-name $nbdport" |
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fi |
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if ! nbd-client -check /dev/nbd0 > /dev/null; then |
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# shellcheck disable=SC2086 |
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nbd-client "$nbdserver" $nbdport /dev/nbd0 $preopts $opts || exit 1 |
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fi |
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# NBD doesn't emit uevents when it gets connected, so kick it |
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echo change > /sys/block/nbd0/uevent |
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udevadm settle |
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need_shutdown |
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exit 0
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