--- /dev/null
+# 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.
+#
+
+# Source the common init script
+. /etc/zfs/zfs-functions
+
+# Paths to what we need - in the initrd, these paths are hardcoded,
+# so override the defines in zfs-functions.
+ZFS="/sbin/zfs"
+ZPOOL="/sbin/zpool"
+ZPOOL_CACHE="/etc/zfs/zpool.cache"
+export ZFS ZPOOL ZPOOL_CACHE
+
+# This runs any scripts that should run before we start importing
+# pools and mounting any filesystems.
+pre_mountroot()
+{
+ if type run_scripts > /dev/null 2>&1 && \
+ [ -f "/scripts/local-top" -o -d "/scripts/local-top" ]
+ then
+ [ "$quiet" != "y" ] && \
+ zfs_log_begin_msg "Running /scripts/local-top"
+ run_scripts /scripts/local-top
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+
+ if type run_scripts > /dev/null 2>&1 && \
+ [ -f "/scripts/local-premount" -o -d "/scripts/local-premount" ]
+ then
+ [ "$quiet" != "y" ] && \
+ zfs_log_begin_msg "Running /scripts/local-premount"
+ run_scripts /scripts/local-premount
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+}
+
+# If plymouth is availible, hide the splash image.
+disable_plymouth()
+{
+ if [ -x /bin/plymouth ] && /bin/plymouth --ping
+ then
+ /bin/plymouth hide-splash >/dev/null 2>&1
+ fi
+}
+
+# Get a ZFS filesystem property value.
+get_fs_value()
+{
+ local fs="$1"
+ local value=$2
+
+ "${ZFS}" get -H -ovalue $value "$fs" 2> /dev/null
+}
+
+# Find the 'bootfs' property on pool $1.
+# If the property does not contain '/', then ignore this
+# pool by exporting it again.
+find_rootfs()
+{
+ local pool="$1"
+
+ # If it's already specified, just keep it mounted and exit
+ # User (kernel command line) must be correct.
+ if [ -n "${ZFS_BOOTFS}" ]
+ then
+ POOL_IMPORTED=1
+ return 0
+ fi
+
+ # Not set, try to find it in the 'bootfs' property of the pool.
+ # NOTE: zpool does not support 'get -H -ovalue bootfs'...
+ ZFS_BOOTFS=$("${ZPOOL}" list -H -obootfs "$pool")
+
+ # Make sure it's not '-' and that it starts with /.
+ if [ "${ZFS_BOOTFS}" != "-" ] && \
+ $(get_fs_value "${ZFS_BOOTFS}" mountpoint | grep -q '^/$')
+ then
+ # Keep it mounted
+ POOL_IMPORTED=1
+ return 0
+ fi
+
+ # Not boot fs here, export it and later try again..
+ "${ZPOOL}" export "$pool"
+
+ return 1
+}
+
+# Support function to get a list of all pools, separated with ';'
+find_pools()
+{
+ local CMD="$*"
+ local pools
+
+ pools=$($CMD 2> /dev/null | \
+ grep -E "pool:|^[a-zA-Z0-9]" | \
+ sed 's@.*: @@' | \
+ sort | \
+ while read pool; do \
+ echo -n "$pool;"
+ done)
+
+ echo "${pools%%;}" # Return without the last ';'.
+}
+
+# Get a list of all availible pools
+get_pools()
+{
+ local available_pools npools
+
+ # Get the base list of availible pools.
+ available_pools=$(find_pools "$ZPOOL" import)
+
+ # Just in case - seen it happen (that a pool isn't visable/found
+ # with a simple "zpool import" but only when using the "-d"
+ # option or setting ZPOOL_IMPORT_PATH).
+ if [ -d "/dev/disk/by-id" ]
+ then
+ npools=$(find_pools "$ZPOOL" import -d /dev/disk/by-id)
+ if [ -n "$npools" ]
+ then
+ # Because we have found extra pool(s) here, which wasn't
+ # found 'normaly', we need to force USE_DISK_BY_ID to
+ # make sure we're able to actually import it/them later.
+ USE_DISK_BY_ID='yes'
+
+ if [ -n "$available_pools" ]
+ then
+ # Filter out duplicates (pools found with the simple
+ # "zpool import" but which is also found with the
+ # "zpool import -d ...").
+ npools=$(echo "$npools" | sed "s,$available_pools,,")
+
+ # Add the list to the existing list of
+ # available pools
+ available_pools="$available_pools;$npools"
+ else
+ available_pools="$npools"
+ fi
+ fi
+ fi
+
+ # Filter out any exceptions...
+ if [ -n "$ZFS_POOL_EXCEPTIONS" ]
+ then
+ local found=""
+ local apools=""
+ local pool exception
+ OLD_IFS="$IFS" ; IFS=";"
+
+ for pool in $available_pools
+ do
+ for exception in $ZFS_POOL_EXCEPTIONS
+ do
+ [ "$pool" = "$exception" ] && continue 2
+ found="$pool"
+ done
+
+ if [ -n "$found" ]
+ then
+ if [ -n "$apools" ]
+ then
+ apools="$apools;$pool"
+ else
+ apools="$pool"
+ fi
+ fi
+ done
+
+ IFS="$OLD_IFS"
+ available_pools="$apools"
+ fi
+
+ # Return list of availible pools.
+ echo "$available_pools"
+}
+
+# Import given pool $1
+import_pool()
+{
+ local pool="$1"
+ local dirs dir ZFS_CMD ZFS_STDERR ZFS_ERROR
+
+ # Verify that the pool isn't already imported
+ # Make as sure as we can to not require '-f' to import.
+ "${ZPOOL}" status "$pool" > /dev/null 2>&1 && return 0
+
+ # For backwards compability, make sure that ZPOOL_IMPORT_PATH is set
+ # to something we can use later with the real import(s). We want to
+ # make sure we find all by* dirs, BUT by-vdev should be first (if it
+ # exists).
+ if [ -n "$USE_DISK_BY_ID" -a -z "$ZPOOL_IMPORT_PATH" ]
+ then
+ dirs="$(for dir in $(echo /dev/disk/by-*)
+ do
+ # Ignore by-vdev here - we want it first!
+ echo "$dir" | grep -q /by-vdev && continue
+ [ ! -d "$dir" ] && continue
+
+ echo -n "$dir:"
+ done | sed 's,:$,,g')"
+
+ if [ -d "/dev/disk/by-vdev" ]
+ then
+ # Add by-vdev at the beginning.
+ ZPOOL_IMPORT_PATH="/dev/disk/by-vdev:"
+ fi
+
+ # ... and /dev at the very end, just for good measure.
+ ZPOOL_IMPORT_PATH="$ZPOOL_IMPORT_PATH$dirs:/dev"
+ fi
+
+ # Needs to be exported for "zpool" to catch it.
+ [ -n "$ZPOOL_IMPORT_PATH" ] && export ZPOOL_IMPORT_PATH
+
+
+ [ "$quiet" != "y" ] && zfs_log_begin_msg \
+ "Importing pool '${pool}' using defaults"
+
+ ZFS_CMD="${ZPOOL} import -N ${ZPOOL_FORCE}"
+ ZFS_STDERR="$($ZFS_CMD "$pool" 2>&1)"
+ ZFS_ERROR="$?"
+ if [ "${ZFS_ERROR}" != 0 ]
+ then
+ [ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
+
+ [ "$quiet" != "y" ] && zfs_log_begin_msg \
+ "Importing pool '${pool}' using cachefile."
+
+ ZFS_CMD="${ZPOOL} import -c ${ZPOOL_CACHE} -N ${ZPOOL_FORCE}"
+ ZFS_STDERR="$($ZFS_CMD "$pool" 2>&1)"
+ ZFS_ERROR="$?"
+ if [ "${ZFS_ERROR}" != 0 ]
+ then
+ [ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
+
+ disable_plymouth
+ echo ""
+ echo "Command: ${ZFS_CMD} '$pool'"
+ echo "Message: $ZFS_STDERR"
+ echo "Error: $ZFS_ERROR"
+ echo ""
+ echo "Failed to import pool '$pool'."
+ echo "Manually import the pool and exit."
+ /bin/sh
+ fi
+ fi
+
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ return 0
+}
+
+# Load ZFS modules
+# Loading a module in a initrd require a slightly different approach,
+# with more logging etc.
+load_module_initrd()
+{
+ if [ "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP" > 0 ]
+ then
+ if [ "$quiet" != "y" ]; then
+ zfs_log_begin_msg "Sleeping for" \
+ "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP seconds..."
+ fi
+ sleep "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP"
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+
+ # Wait for all of the /dev/{hd,sd}[a-z] device nodes to appear.
+ if type wait_for_udev > /dev/null 2>&1 ; then
+ wait_for_udev 10
+ elif type wait_for_dev > /dev/null 2>&1 ; then
+ wait_for_dev
+ fi
+
+ # zpool import refuse to import without a valid mtab
+ [ ! -f /proc/mounts ] && mount proc /proc
+ [ ! -f /etc/mtab ] && cat /proc/mounts > /etc/mtab
+
+ # Load the module
+ load_module || return 1
+
+ if [ "$ZFS_INITRD_POST_MODPROBE_SLEEP" > 0 ]
+ then
+ if [ "$quiet" != "y" ]; then
+ zfs_log_begin_msg "Sleeping for" \
+ "$ZFS_INITRD_POST_MODPROBE_SLEEP seconds..."
+ fi
+ sleep "$ZFS_INITRD_POST_MODPROBE_SLEEP"
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+
+ return 0
+}
+
+# Mount a given filesystem
+mount_fs()
+{
+ local fs="$1"
+ local mountpoint ZFS_CMD ZFS_STDERR ZFS_ERROR
+
+ # Need the _original_ datasets mountpoint!
+ mountpoint=$(get_fs_value "$fs" mountpoint)
+ if [ "$mountpoint" = "legacy" -o "$mountpoint" = "none" ]; then
+ # Can't use the mountpoint property. Might be one of our
+ # clones. Check the 'org.zol:mountpoint' property set in
+ # clone_snap() if that's usable.
+ mountpoint=$(get_fs_value "$fs" org.zol:mountpoint)
+ if [ "$mountpoint" = "legacy" -o \
+ "$mountpoint" = "none" -o \
+ "$mountpoint" = "-" ]
+ then
+ if [ "$fs" != "${ZFS_BOOTFS}" ]; then
+ # We don't have a proper mountpoint, this
+ # isn't the root fs. So extract the root fs
+ # value from the filesystem, and we should
+ # (hopefully!) have a mountpoint we can use.
+ mountpoint="${fs##$ZFS_BOOTFS}"
+ else
+ # Last hail-mary: Hope 'rootmnt' is set!
+ mountpoint=""
+ fi
+ fi
+
+ if [ "$mountpoint" = "legacy" ]; then
+ ZFS_CMD="mount -t zfs"
+ else
+ # If it's not a legacy filesystem, it can only be a
+ # native one...
+ ZFS_CMD="mount -o zfsutil -t zfs"
+ fi
+ else
+ ZFS_CMD="mount -o zfsutil -t zfs"
+ fi
+
+ # Possibly decrypt a filesystem using native encryption.
+ decrypt_fs "$fs"
+
+ [ "$quiet" != "y" ] && \
+ zfs_log_begin_msg "Mounting '${fs}' on '${rootmnt}/${mountpoint}'"
+ [ -n "${ZFS_DEBUG}" ] && \
+ zfs_log_begin_msg "CMD: '$ZFS_CMD ${fs} ${rootmnt}/${mountpoint}'"
+
+ ZFS_STDERR=$(${ZFS_CMD} "${fs}" "${rootmnt}/${mountpoint}" 2>&1)
+ ZFS_ERROR=$?
+ if [ "${ZFS_ERROR}" != 0 ]
+ then
+ [ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
+
+ disable_plymouth
+ echo ""
+ echo "Command: ${ZFS_CMD} ${fs} ${rootmnt}/${mountpoint}"
+ echo "Message: $ZFS_STDERR"
+ echo "Error: $ZFS_ERROR"
+ echo ""
+ echo "Failed to mount ${fs} on ${rootmnt}/${mountpoint}."
+ echo "Manually mount the filesystem and exit."
+ /bin/sh
+ else
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+
+ return 0
+}
+
+# Unlock a ZFS native crypted filesystem.
+decrypt_fs()
+{
+ local fs="$1"
+ local ZFS_CMD ZFS_STDERR ZFS_ERROR
+
+ # If the 'zfs key' command isn't availible, exit right here.
+ "${ZFS}" 2>&1 | grep -q 'key -l ' || return 0
+
+ # Check if filesystem is encrypted. If not, exit right here.
+ [ "$(get_fs_value "$fs" encryption)" != "off" ] || return 0
+
+ [ "$quiet" != "y" ] && \
+ zfs_log_begin_msg "Loading crypto wrapper key for $fs"
+
+ # Just make sure that ALL crypto modules module is loaded.
+ # Simplest just to load all...
+ for mod in sun-ccm sun-gcm sun-ctr
+ do
+ [ "$quiet" != "y" ] && zfs_log_progress_msg "${mod} "
+
+ ZFS_CMD="/sbin/modprobe $mod"
+ ZFS_STDERR="$(${ZFS_CMD} 2>&1)"
+ ZFS_ERROR="$?"
+
+ if [ "${ZFS_ERROR}" != 0 ]
+ then
+ [ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
+
+ disable_plymouth
+ echo ""
+ echo "Command: $ZFS_CMD"
+ echo "Message: $ZFS_STDERR"
+ echo "Error: $ZFS_ERROR"
+ echo ""
+ echo "Failed to load $mod module."
+ echo "Please verify that it is availible on the initrd image"
+ echo "(without it it won't be possible to unlock the filesystem)"
+ echo "and rerun: $ZFS_CMD"
+ /bin/sh
+ else
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+ done
+
+ # If the key isn't availible, then this will fail!
+ ZFS_CMD="${ZFS} key -l -r $fs"
+ ZFS_STDERR="$(${ZFS_CMD} 2>&1)"
+ ZFS_ERROR="$?"
+
+ if [ "${ZFS_ERROR}" != 0 ]
+ then
+ [ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
+
+ disable_plymouth
+ echo ""
+ echo "Command: $ZFS_CMD"
+ echo "Message: $ZFS_STDERR"
+ echo "Error: $ZFS_ERROR"
+ echo ""
+ echo "Failed to load zfs encryption wrapper key (s)."
+ echo "Please verify dataset property 'keysource' for datasets"
+ echo "and rerun: $ZFS_CMD"
+ /bin/sh
+ else
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+
+ return 0
+}
+
+# Destroy a given filesystem.
+destroy_fs()
+{
+ local fs="$1"
+ local ZFS_CMD ZFS_STDERR ZFS_ERROR
+
+ [ "$quiet" != "y" ] && \
+ zfs_log_begin_msg "Destroying '$fs'"
+
+ ZFS_CMD="${ZFS} destroy $fs"
+ ZFS_STDERR="$(${ZFS_CMD} 2>&1)"
+ ZFS_ERROR="$?"
+ if [ "${ZFS_ERROR}" != 0 ]
+ then
+ [ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
+
+ disable_plymouth
+ echo ""
+ echo "Command: $ZFS_CMD"
+ echo "Message: $ZFS_STDERR"
+ echo "Error: $ZFS_ERROR"
+ echo ""
+ echo "Failed to destroy '$fs'. Please make sure that '$fs' is not availible."
+ echo "Hint: Try: zfs destroy -Rfn $fs"
+ echo "If this dryrun looks good, then remove the 'n' from '-Rfn' and try again."
+ /bin/sh
+ else
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+
+ return 0
+}
+
+# Clone snapshot $1 to destination filesystem $2
+# Set 'canmount=noauto' and 'mountpoint=none' so that we get to keep
+# manual controll over it's mounting (i.e., make sure it's not automatically
+# mounted with a 'zfs mount -a' in the init/systemd scripts).
+clone_snap()
+{
+ local snap="$1"
+ local destfs="$2"
+ local mountpoint="$3"
+ local ZFS_CMD ZFS_STDERR ZFS_ERROR
+
+ [ "$quiet" != "y" ] && zfs_log_begin_msg "Cloning '$snap' to '$destfs'"
+
+ # Clone the snapshot into a dataset we can boot from
+ # + We don't want this filesystem to be automatically mounted, we
+ # want controll over this here and nowhere else.
+ # + We don't need any mountpoint set for the same reason.
+ # We use the 'org.zol:mountpoint' property to remember the mountpoint.
+ ZFS_CMD="${ZFS} clone -o canmount=noauto -o mountpoint=none"
+ ZFS_CMD="${ZFS_CMD} -o org.zol:mountpoint=${mountpoint}"
+ ZFS_CMD="${ZFS_CMD} $snap $destfs"
+ ZFS_STDERR="$(${ZFS_CMD} 2>&1)"
+ ZFS_ERROR="$?"
+ if [ "${ZFS_ERROR}" != 0 ]
+ then
+ [ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
+
+ disable_plymouth
+ echo ""
+ echo "Command: $ZFS_CMD"
+ echo "Message: $ZFS_STDERR"
+ echo "Error: $ZFS_ERROR"
+ echo ""
+ echo "Failed to clone snapshot."
+ echo "Make sure that the any problems are corrected and then make sure"
+ echo "that the dataset '$destfs' exists and is bootable."
+ /bin/sh
+ else
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+
+ return 0
+}
+
+# Rollback a given snapshot.
+rollback_snap()
+{
+ local snap="$1"
+ local ZFS_CMD ZFS_STDERR ZFS_ERROR
+
+ [ "$quiet" != "y" ] && zfs_log_begin_msg "Rollback $snap"
+
+ ZFS_CMD="${ZFS} rollback -Rf $snap"
+ ZFS_STDERR="$(${ZFS_CMD} 2>&1)"
+ ZFS_ERROR="$?"
+ if [ "${ZFS_ERROR}" != 0 ]
+ then
+ [ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}"
+
+ disable_plymouth
+ echo ""
+ echo "Command: $ZFS_CMD"
+ echo "Message: $ZFS_STDERR"
+ echo "Error: $ZFS_ERROR"
+ echo ""
+ echo "Failed to rollback snapshot."
+ /bin/sh
+ else
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+
+ return 0
+}
+
+# Get a list of snapshots, give them as a numbered list
+# to the user to choose from.
+ask_user_snap()
+{
+ local fs="$1"
+ local i=1
+ local SNAP snapnr snap debug
+
+ # We need to temporarily disable debugging. Set 'debug' so we
+ # remember to enabled it again.
+ if [ -n "${ZFS_DEBUG}" ]; then
+ unset ZFS_DEBUG
+ set +x
+ debug=1
+ fi
+
+ # Because we need the resulting snapshot, which is sent on
+ # stdout to the caller, we use stderr for our questions.
+ echo "What snapshot do you want to boot from?" > /dev/stderr
+ while read snap; do
+ echo " $i: ${snap}" > /dev/stderr
+ eval `echo SNAP_$i=$snap`
+ i=$((i + 1))
+ done <<EOT
+$("${ZFS}" list -H -oname -tsnapshot "${fs}")
+EOT
+
+ echo -n " Snap nr [0-$((i-1))]? " > /dev/stderr
+ read snapnr
+
+ # Reenable debugging.
+ if [ -n "${debug}" ]; then
+ ZFS_DEBUG=1
+ set -x
+ fi
+
+ echo "$(eval echo "$"SNAP_$snapnr)"
+}
+
+setup_snapshot_booting()
+{
+ local snap="$1"
+ local s destfs subfs mountpoint retval=0 filesystems fs
+
+ # Make sure that the snapshot specified actually exist.
+ if [ ! $(get_fs_value "${snap}" type) ]
+ then
+ # Snapshot does not exist (...@<null> ?)
+ # ask the user for a snapshot to use.
+ snap="$(ask_user_snap "${snap%%@*}")"
+ fi
+
+ # Separate the full snapshot ('$snap') into it's filesystem and
+ # snapshot names. Would have been nice with a split() function..
+ rootfs="${snap%%@*}"
+ snapname="${snap##*@}"
+ ZFS_BOOTFS="${rootfs}_${snapname}"
+
+ if ! grep -qiE '(^|[^\\](\\\\)* )(rollback)=(on|yes|1)( |$)' /proc/cmdline
+ then
+ # If the destination dataset for the clone
+ # already exists, destroy it. Recursivly
+ if [ $(get_fs_value "${rootfs}_${snapname}" type) ]; then
+ filesystems=$("${ZFS}" list -oname -tfilesystem -H \
+ -r "${ZFS_BOOTFS}" | sort -r)
+ for fs in $filesystems; do
+ destroy_fs "${fs}"
+ done
+ fi
+ fi
+
+ # Get all snapshots, recursivly (might need to clone /usr, /var etc
+ # as well).
+ for s in $("${ZFS}" list -H -oname -tsnapshot -r "${rootfs}" | \
+ grep "${snapname}")
+ do
+ if grep -qiE '(^|[^\\](\\\\)* )(rollback)=(on|yes|1)( |$)' /proc/cmdline
+ then
+ # Rollback snapshot
+ rollback_snap "$s" || retval=$((retval + 1))
+ else
+ # Setup a destination filesystem name.
+ # Ex: Called with 'rpool/ROOT/debian@snap2'
+ # rpool/ROOT/debian@snap2 => rpool/ROOT/debian_snap2
+ # rpool/ROOT/debian/boot@snap2 => rpool/ROOT/debian_snap2/boot
+ # rpool/ROOT/debian/usr@snap2 => rpool/ROOT/debian_snap2/usr
+ # rpool/ROOT/debian/var@snap2 => rpool/ROOT/debian_snap2/var
+ subfs="${s##$rootfs}"
+ subfs="${subfs%%@$snapname}"
+
+ destfs="${rootfs}_${snapname}" # base fs.
+ [ -n "$subfs" ] && destfs="${destfs}$subfs" # + sub fs.
+
+ # Get the mountpoint of the filesystem, to be used
+ # with clone_snap(). If legacy or none, then use
+ # the sub fs value.
+ mountpoint=$(get_fs_value "${s%%@*}" mountpoint)
+ if [ "$mountpoint" = "legacy" -o \
+ "$mountpoint" = "none" ]
+ then
+ if [ -n "${subfs}" ]; then
+ mountpoint="${subfs}"
+ else
+ mountpoint="/"
+ fi
+ fi
+
+ # Clone the snapshot into its own
+ # filesystem
+ clone_snap "$s" "${destfs}" "${mountpoint}" || \
+ retval=$((retval + 1))
+ fi
+ done
+
+ # If we haven't return yet, we have a problem...
+ return "${retval}"
+}
+
+# ================================================================
+
+# This is the main function.
+mountroot()
+{
+ local snaporig
+ local snapsub
+ local destfs
+
+ # ----------------------------------------------------------------
+ # I N I T I A L S E T U P
+
+ # ------------
+ # Run the pre-mount scripts from /scripts/local-top.
+ pre_mountroot
+
+ # ------------
+ # Source the default setup variables.
+ [ -r '/etc/default/zfs' ] && . /etc/default/zfs
+
+ # ------------
+ # Support debug option
+ if grep -qiE '(^|[^\\](\\\\)* )(zfs_debug|zfs\.debug|zfsdebug)=(on|yes|1)( |$)' /proc/cmdline
+ then
+ ZFS_DEBUG=1
+ mkdir /var/log
+ #exec 2> /var/log/boot.debug
+ set -x
+ fi
+
+ # ------------
+ # Load ZFS module etc.
+ if ! load_module_initrd; then
+ disable_plymouth
+ echo ""
+ echo "Failed to load ZFS modules."
+ echo "Manually load the modules and exit."
+ /bin/sh
+ fi
+
+ # ------------
+ # Look for the cache file (if any).
+ [ ! -f ${ZPOOL_CACHE} ] && unset ZPOOL_CACHE
+
+ # ------------
+ # Compatibility: 'ROOT' is for Debian GNU/Linux (etc),
+ # 'root' is for Redhat/Fedora (etc),
+ # 'REAL_ROOT' is for Gentoo
+ if [ -z "$ROOT" ]
+ then
+ [ -n "$root" ] && ROOT=${root}
+
+ [ -n "$REAL_ROOT" ] && ROOT=${REAL_ROOT}
+ fi
+
+ # ------------
+ # Where to mount the root fs in the initrd - set outside this script
+ # Compatibility: 'rootmnt' is for Debian GNU/Linux (etc),
+ # 'NEWROOT' is for RedHat/Fedora (etc),
+ # 'NEW_ROOT' is for Gentoo
+ if [ -z "$rootmnt" ]
+ then
+ [ -n "$NEWROOT" ] && rootmnt=${NEWROOT}
+
+ [ -n "$NEW_ROOT" ] && rootmnt=${NEW_ROOT}
+ fi
+
+ # ------------
+ # No longer set in the defaults file, but it could have been set in
+ # get_pools() in some circumstances. If it's something, but not 'yes',
+ # it's no good to us.
+ [ -n "$USE_DISK_BY_ID" -a "$USE_DISK_BY_ID" != 'yes' ] && \
+ unset USE_DISK_BY_ID
+
+ # ----------------------------------------------------------------
+ # P A R S E C O M M A N D L I N E O P T I O N S
+
+ # This part is the really ugly part - there's so many options and permutations
+ # 'out there', and if we should make this the 'primary' source for ZFS initrd
+ # scripting, we need/should support them all.
+ #
+ # Supports the following kernel command line argument combinations
+ # (in this order - first match win):
+ #
+ # rpool=<pool> (tries to finds bootfs automatically)
+ # bootfs=<pool>/<dataset> (uses this for rpool - first part)
+ # rpool=<pool> bootfs=<pool>/<dataset>
+ # -B zfs-bootfs=<pool>/<fs> (uses this for rpool - first part)
+ # rpool=rpool (default if none of the above is used)
+ # root=<pool>/<dataset> (uses this for rpool - first part)
+ # root=ZFS=<pool>/<dataset> (uses this for rpool - first part, without 'ZFS=')
+ # root=zfs:AUTO (tries to detect both pool and rootfs
+ # root=zfs:<pool>/<dataset> (uses this for rpool - first part, without 'zfs:')
+ #
+ # Option <dataset> could also be <snapshot>
+
+ # ------------
+ # Support force option
+ # In addition, setting one of zfs_force, zfs.force or zfsforce to
+ # 'yes', 'on' or '1' will make sure we force import the pool.
+ # This should (almost) never be needed, but it's here for
+ # completeness.
+ ZPOOL_FORCE=""
+ if grep -qiE '(^|[^\\](\\\\)* )(zfs_force|zfs\.force|zfsforce)=(on|yes|1)( |$)' /proc/cmdline
+ then
+ ZPOOL_FORCE="-f"
+ fi
+
+ # ------------
+ # Look for 'rpool' and 'bootfs' parameter
+ [ -n "$rpool" ] && ZFS_RPOOL="${rpool#rpool=}"
+ [ -n "$bootfs" ] && ZFS_BOOTFS="${bootfs#bootfs=}"
+
+ # ------------
+ # If we have 'ROOT' (see above), but not 'ZFS_BOOTFS', then use
+ # 'ROOT'
+ [ -n "$ROOT" -a -z "${ZFS_BOOTFS}" ] && ZFS_BOOTFS="$ROOT"
+
+ # ------------
+ # Check for the `-B zfs-bootfs=%s/%u,...` kind of parameter.
+ # NOTE: Only use the pool name and dataset. The rest is not
+ # supported by ZoL (whatever it's for).
+ if [ -z "$ZFS_RPOOL" ]
+ then
+ # 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')
+ fi
+
+ # ------------
+ # No root fs or pool specified - do auto detect.
+ if [ -z "$ZFS_RPOOL" -a -z "${ZFS_BOOTFS}" ]
+ then
+ # Do auto detect. Do this by 'cheating' - set 'root=zfs:AUTO'
+ # which will be caught later
+ ROOT=zfs:AUTO
+ fi
+
+ # ----------------------------------------------------------------
+ # F I N D A N D I M P O R T C O R R E C T P O O L
+
+ # ------------
+ if [ "$ROOT" = "zfs:AUTO" ]
+ then
+ # Try to detect both pool and root fs.
+
+ [ "$quiet" != "y" ] && \
+ zfs_log_begin_msg "Attempting to import additional pools."
+
+ # Get a list of pools available for import
+ if [ -n "$ZFS_RPOOL" ]
+ then
+ # We've specified a pool - check only that
+ POOLS=$ZFS_RPOOL
+ else
+ POOLS=$(get_pools)
+ fi
+
+ OLD_IFS="$IFS" ; IFS=";"
+ for pool in $POOLS
+ do
+ [ -z "$pool" ] && continue
+
+ import_pool "$pool"
+ find_rootfs "$pool"
+ done
+ IFS="$OLD_IFS"
+
+ [ "$quiet" != "y" ] && zfs_log_end_msg $ZFS_ERROR
+ else
+ # No auto - use value from the command line option.
+
+ # Strip 'zfs:' and 'ZFS='.
+ ZFS_BOOTFS="${ROOT#*[:=]}"
+
+ # Stip everything after the first slash.
+ ZFS_RPOOL="${ZFS_BOOTFS%%/*}"
+ fi
+
+ # Import the pool (if not already done so in the AUTO check above).
+ if [ -n "$ZFS_RPOOL" -a -z "${POOL_IMPORTED}" ]
+ then
+ [ "$quiet" != "y" ] && \
+ zfs_log_begin_msg "Importing ZFS root pool '$ZFS_RPOOL'"
+
+ import_pool "${ZFS_RPOOL}"
+ find_rootfs "${ZFS_RPOOL}"
+
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+
+ if [ -z "${POOL_IMPORTED}" ]
+ then
+ # No pool imported, this is serious!
+ disable_plymouth
+ echo ""
+ echo "Command: $ZFS_CMD"
+ echo "Message: $ZFS_STDERR"
+ echo "Error: $ZFS_ERROR"
+ echo ""
+ echo "No pool imported. Manually import the root pool"
+ echo "at the command prompt and then exit."
+ echo "Hint: Try: zpool import -R ${rootmnt} -N ${ZFS_RPOOL}"
+ /bin/sh
+ fi
+
+ # ----------------------------------------------------------------
+ # P R E P A R E R O O T F I L E S Y S T E M
+
+ if [ -n "${ZFS_BOOTFS}" ]
+ then
+ # Booting from a snapshot?
+ # Will overwrite the ZFS_BOOTFS variable like so:
+ # rpool/ROOT/debian@snap2 => rpool/ROOT/debian_snap2
+ echo "${ZFS_BOOTFS}" | grep -q '@' && \
+ setup_snapshot_booting "${ZFS_BOOTFS}"
+ fi
+
+ if [ -z "${ZFS_BOOTFS}" ]
+ then
+ # Still nothing! Let the user sort this out.
+ disable_plymouth
+ echo ""
+ echo "Error: Unknown root filesystem - no 'bootfs' pool property and"
+ echo " not specified on the kernel command line."
+ echo ""
+ echo "Manually mount the root filesystem on $rootmnt and then exit."
+ echo "Hint: Try: mount -o zfsutil -t zfs ${ZFS_RPOOL-rpool}/ROOT/system $rootmnt"
+ /bin/sh
+ fi
+
+ # ----------------------------------------------------------------
+ # M O U N T F I L E S Y S T E M S
+
+ # * Ideally, the root filesystem would be mounted like this:
+ #
+ # zpool import -R "$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.
+ #
+ # * Mount additional filesystems required
+ # Such as /usr, /var, /usr/local etc.
+ # NOTE: Mounted in the order specified in the
+ # ZFS_INITRD_ADDITIONAL_DATASETS variable so take care!
+
+ # Go through the complete list (recursivly) of all filesystems below
+ # the real root dataset
+ filesystems=$("${ZFS}" list -oname -tfilesystem -H -r "${ZFS_BOOTFS}")
+ for fs in $filesystems $ZFS_INITRD_ADDITIONAL_DATASETS
+ do
+ mount_fs "$fs"
+ done
+
+ # ------------
+ # Debugging information
+ if [ -n "${ZFS_DEBUG}" ]
+ then
+ #exec 2>&1-
+
+ echo "DEBUG: imported pools:"
+ "${ZPOOL}" list -H
+ echo
+
+ echo "DEBUG: mounted ZFS filesystems:"
+ mount | grep zfs
+ echo
+
+ echo "=> waiting for ENTER before continuing because of 'zfsdebug=1'. "
+ echo -n " 'c' for shell, 'r' for reboot, 'ENTER' to continue. "
+ read b
+
+ [ "$b" = "c" ] && /bin/sh
+ [ "$b" = "r" ] && reboot -f
+
+ set +x
+ fi
+
+ # ------------
+ # Run local bottom script
+ if type run_scripts > /dev/null 2>&1 && \
+ [ -f "/scripts/local-bottom" -o -d "/scripts/local-bottom" ]
+ then
+ [ "$quiet" != "y" ] && \
+ zfs_log_begin_msg "Running /scripts/local-bottom"
+ run_scripts /scripts/local-bottom
+ [ "$quiet" != "y" ] && zfs_log_end_msg
+ fi
+}
projects / zfs / commitdiff