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# ZFS boot stub for initramfs-tools.
#
# In the initramfs environment, the /init script sources this stub to
# override the default functions in the /scripts/local script.
#
# Enable this by passing boot=zfs on the kernel command line.
#
pre_mountroot()
{
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-top"
run_scripts /scripts/local-top
[ "$quiet" != "y" ] && log_end_msg
if [ -r '/etc/default/zfs' ]
then
. '/etc/default/zfs'
if [ "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP" -gt '0' ]
then
[ "$quiet" != "y" ] && log_begin_msg "Sleeping for $ZFS_INITRD_PRE_MOUNTROOT_SLEEP seconds..."
sleep "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP"
[ "$quiet" != "y" ] && log_end_msg
fi
fi
}
# Duplicates the functionality found under try_failure_hooks in functions
# but invoking that would be inappropriate here.
disable_plymouth()
{
if [ -x /bin/plymouth ] && /bin/plymouth --ping
then
/bin/plymouth hide-splash >/dev/null 2>&1
fi
}
mountroot()
{
pre_mountroot
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-premount"
run_scripts /scripts/local-premount
[ "$quiet" != "y" ] && log_end_msg
# Wait for all of the /dev/{hd,sd}[a-z] device nodes to appear.
wait_for_udev
# Load the module now to get consistent automatic pool import behavior.
modprobe zfs
# Check the kernel command line for overrides.
ZFS_RPOOL="${rpool#rpool=}"
ZFS_BOOTFS="${bootfs#bootfs=}"
if [ -z "$ZFS_RPOOL" ]
then
# Check for the `-B zfs-bootfs=%s/%u,...` kind of parameter.
#
# The ${zfs-bootfs} variable is set at the kernel commmand
# line, usually by GRUB, but it cannot be referenced here
# directly because bourne variable names cannot contain a
# hyphen.
#
# Reassign the variable by dumping the environment and
# stripping the zfs-bootfs= prefix. Let the shell handle
# quoting through the eval command.
eval ZFS_RPOOL=$(set | sed -n -e 's,^zfs-bootfs=,,p')
# Only the pool name is relevant because the ZFS filesystem on
# Linux is extrinsic and the userland cannot resolve a ZFS
# object number.
#
# Strip everything after the first slash character.
ZFS_RPOOL=$(echo "$ZFS_RPOOL" | sed -e 's,/.*,,')
fi
# Use "rpool" as the default, like on most Solaris systems.
[ -z "$ZFS_RPOOL" ] && ZFS_RPOOL='rpool'
# @FIXME: Forcing the import should not be necessary.
#
# Consider inhibiting automatic zpool imports in the initramfs
# environment and doing a full import in the regular system instead.
[ "$quiet" != "y" ] && log_begin_msg "Importing ZFS root pool $ZFS_RPOOL"
if [ -f /etc/zfs/zpool.cache ]
then
ZFS_STDERR=$(zpool list "$ZFS_RPOOL" 1>/dev/null 2>&1 \
|| zpool import -f -N "$ZFS_RPOOL" 2>&1)
ZFS_ERROR=$?
else
ZFS_STDERR=$(zpool import -f -N "$ZFS_RPOOL" 2>&1)
ZFS_ERROR=$?
fi
[ "$quiet" != "y" ] && log_end_msg
if [ "$ZFS_ERROR" -ne 0 ]
then
disable_plymouth
echo "Command: zpool import -f -N $ZFS_RPOOL"
echo "Message: $ZFS_STDERR"
echo "Error: $ZFS_ERROR"
echo ""
echo "Manually import the root pool at the command prompt and then exit."
echo "Hint: Try: zpool import -f -R / -N $ZFS_RPOOL"
# /bin/sh
fi
if [ -z "$ZFS_BOOTFS" ]
then
[ "$quiet" != "y" ] && log_begin_msg "Getting ZFS bootfs property"
ZFS_BOOTFS=$(zpool list -H -o bootfs "$ZFS_RPOOL")
ZFS_ERROR=$?
[ "$quiet" != "y" ] && log_end_msg
fi
if [ -z "$ZFS_BOOTFS" ]
then
disable_plymouth
echo "Command: zpool list -H -o bootfs $ZFS_RPOOL"
echo "Error: $ZFS_ERROR, unable to get the bootfs property."
echo ""
echo "Manually mount the root filesystem on $rootmnt and then exit."
echo "Hint: Try: mount -t zfs -o zfsutil $ZFS_RPOOL/ROOT/system $rootmnt"
/bin/sh
fi
# Force the mountpoint to the only correct value for a root filesystem.
[ "$quiet" != "y" ] && log_begin_msg "Setting mountpoint=/ on ZFS filesystem $ZFS_BOOTFS"
ZFS_STDERR=$(zfs set mountpoint=/ "$ZFS_BOOTFS" 2>&1)
[ "$quiet" != "y" ] && log_end_msg
# Ideally, the root filesystem would be mounted like this:
#
# zpool import -R "$rootmnt" -N "$ZFS_RPOOL"
# zfs mount -o mountpoint=/ "$ZFS_BOOTFS"
#
# but the MOUNTPOINT prefix is preserved on descendent filesystem after
# the pivot into the regular root, which later breaks things like
# `zfs mount -a` and the /etc/mtab refresh.
[ "$quiet" != "y" ] && log_begin_msg "Mounting ZFS filesystem $ZFS_BOOTFS"
ZFS_STDERR=$(mount -t zfs -o zfsutil "$ZFS_BOOTFS" "$rootmnt" 2>&1)
ZFS_ERROR=$?
[ "$quiet" != "y" ] && log_end_msg
if [ "$ZFS_ERROR" -ne 0 ]
then
disable_plymouth
echo ""
echo "Command: mount -t zfs -o zfsutil $ZFS_BOOTFS $rootmnt"
echo "Message: $ZFS_STDERR"
echo "Error: $ZFS_ERROR"
echo ""
echo "Manually mount the root filesystem on $rootmnt and then exit."
/bin/sh
fi
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/local-bottom"
run_scripts /scripts/local-bottom
[ "$quiet" != "y" ] && log_end_msg
}
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