# 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 functions . /etc/zfs/zfs-functions # Start interactive shell. # Use debian's panic() if defined, because it allows to prevent shell access # by setting panic in cmdline (e.g. panic=0 or panic=15). # See "4.5 Disable root prompt on the initramfs" of Securing Debian Manual: # https://www.debian.org/doc/manuals/securing-debian-howto/ch4.en.html shell() { if command -v panic > /dev/null 2>&1; then panic else /bin/sh fi } # This runs any scripts that should run before we start importing # pools and mounting any filesystems. pre_mountroot() { if command -v run_scripts > /dev/null 2>&1 then if [ -f "/scripts/local-top" ] || [ -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 [ -f "/scripts/local-premount" ] || [ -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 fi } # If plymouth is available, 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() { fs="$1" 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() { pool="$1" # If 'POOL_IMPORTED' isn't set, no pool imported and therefore # we won't be able to find a root fs. [ -z "${POOL_IMPORTED}" ] && return 1 # If it's already specified, just keep it mounted and exit # User (kernel command line) must be correct. [ -n "${ZFS_BOOTFS}" ] && return 0 # Not set, try to find it in the 'bootfs' property of the pool. # NOTE: zpool does not support 'get -H -ovalue bootfs'... ZFS_BOOTFS=$("${ZPOOL}" list -H -obootfs "$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 "$pool" POOL_IMPORTED= ZFS_BOOTFS= return 1 } # Support function to get a list of all pools, separated with ';' find_pools() { CMD="$*" pools=$($CMD 2> /dev/null | \ grep -E "pool:|^[a-zA-Z0-9]" | \ sed 's@.*: @@' | \ while read -r pool; do \ printf "%s" "$pool;" done) echo "${pools%%;}" # Return without the last ';'. } # Get a list of all available pools get_pools() { if [ -n "${ZFS_POOL_IMPORT}" ]; then echo "$ZFS_POOL_IMPORT" return 0 fi # Get the base list of available pools. available_pools=$(find_pools "$ZPOOL" import) # Just in case - seen it happen (that a pool isn't visible/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 "$npools" ] then # Because we have found extra pool(s) here, which wasn't # found 'normally', we need to force USE_DISK_BY_ID to # make sure we're able to actually import it/them later. USE_DISK_BY_ID='yes' if [ -n "$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 "$ZFS_POOL_EXCEPTIONS" ] then found="" apools="" OLD_IFS="$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="$apools" fi # Return list of available pools. echo "$available_pools" } # Import given pool $1 import_pool() { pool="$1" # Verify that the pool isn't already imported # Make as sure as we can to not require '-f' to import. "${ZPOOL}" get name,guid -o value -H 2>/dev/null | grep -Fxq "$pool" && return 0 # For backwards compatibility, make sure that ZPOOL_IMPORT_PATH is set # to something we can use later with the real import(s). We want to # make sure we find all by* dirs, BUT by-vdev should be first (if it # exists). if [ -n "$USE_DISK_BY_ID" ] && [ -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 "$dir" ] && continue printf "%s" "$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} ${ZPOOL_IMPORT_OPTS}" ZFS_STDERR="$($ZFS_CMD "$pool" 2>&1)" ZFS_ERROR="$?" if [ "${ZFS_ERROR}" != 0 ] then [ "$quiet" != "y" ] && zfs_log_failure_msg "${ZFS_ERROR}" if [ -f "${ZPOOL_CACHE}" ] then [ "$quiet" != "y" ] && zfs_log_begin_msg \ "Importing pool '${pool}' using cachefile." ZFS_CMD="${ZPOOL} import -c ${ZPOOL_CACHE} -N ${ZPOOL_FORCE} ${ZPOOL_IMPORT_OPTS}" ZFS_STDERR="$($ZFS_CMD "$pool" 2>&1)" ZFS_ERROR="$?" fi if [ "${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." shell fi fi [ "$quiet" != "y" ] && zfs_log_end_msg POOL_IMPORTED=1 return 0 } # Load ZFS modules # Loading a module in a initrd require a slightly different approach, # with more logging etc. load_module_initrd() { [ -n "$ROOTDELAY" ] && ZFS_INITRD_PRE_MOUNTROOT_SLEEP="$ROOTDELAY" if [ "$ZFS_INITRD_PRE_MOUNTROOT_SLEEP" -gt 0 ] 2>/dev/null 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 command -v wait_for_udev > /dev/null 2>&1 ; then wait_for_udev 10 elif command -v wait_for_dev > /dev/null 2>&1 ; then wait_for_dev fi # zpool import refuse to import without a valid /proc/self/mounts [ ! -f /proc/self/mounts ] && mount proc /proc # Load the module load_module "zfs" || return 1 if [ "$ZFS_INITRD_POST_MODPROBE_SLEEP" -gt 0 ] 2>/dev/null then if [ "$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() { fs="$1" # Check that the filesystem exists "${ZFS}" list -oname -tfilesystem -H "${fs}" > /dev/null 2>&1 || return 1 # Skip filesystems with canmount=off. The root fs should not have # canmount=off, but ignore it for backwards compatibility just in case. if [ "$fs" != "${ZFS_BOOTFS}" ] then canmount=$(get_fs_value "$fs" canmount) [ "$canmount" = "off" ] && return 0 fi # Need the _original_ datasets mountpoint! mountpoint=$(get_fs_value "$fs" mountpoint) if [ "$mountpoint" = "legacy" ] || [ "$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 [ "$mountpoint" = "legacy" ] || [ "$mountpoint" = "none" ] || [ "$mountpoint" = "-" ] then if [ "$fs" != "${ZFS_BOOTFS}" ]; then # We don't have a proper mountpoint and this # isn't the root fs. return 0 else # Last hail-mary: Hope 'rootmnt' is set! mountpoint="" fi fi if [ "$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." shell else [ "$quiet" != "y" ] && zfs_log_end_msg fi return 0 } # Unlock a ZFS native encrypted filesystem. decrypt_fs() { fs="$1" # If pool encryption is active and the zfs command understands '-o encryption' if [ "$(zpool list -H -o feature@encryption "$(echo "${fs}" | awk -F/ '{print $1}')")" = 'active' ]; then # Determine dataset that holds key for root dataset ENCRYPTIONROOT="$(get_fs_value "${fs}" encryptionroot)" KEYLOCATION="$(get_fs_value "${ENCRYPTIONROOT}" keylocation)" echo "${ENCRYPTIONROOT}" > /run/zfs_fs_name # If root dataset is encrypted... if ! [ "${ENCRYPTIONROOT}" = "-" ]; then KEYSTATUS="$(get_fs_value "${ENCRYPTIONROOT}" keystatus)" # Continue only if the key needs to be loaded [ "$KEYSTATUS" = "unavailable" ] || return 0 # Do not prompt if key is stored noninteractively, if ! [ "${KEYLOCATION}" = "prompt" ]; then $ZFS load-key "${ENCRYPTIONROOT}" # Prompt with plymouth, if active elif /bin/plymouth --ping 2>/dev/null; then echo "plymouth" > /run/zfs_console_askpwd_cmd for _ in 1 2 3; do plymouth ask-for-password --prompt "Encrypted ZFS password for ${ENCRYPTIONROOT}" | \ $ZFS load-key "${ENCRYPTIONROOT}" && break done # Prompt with systemd, if active elif [ -e /run/systemd/system ]; then echo "systemd-ask-password" > /run/zfs_console_askpwd_cmd for _ in 1 2 3; do systemd-ask-password "Encrypted ZFS password for ${ENCRYPTIONROOT}" --no-tty | \ $ZFS load-key "${ENCRYPTIONROOT}" && break done # Prompt with ZFS tty, otherwise else # Temporarily setting "printk" to "7" allows the prompt to appear even when the "quiet" kernel option has been used echo "load-key" > /run/zfs_console_askpwd_cmd storeprintk="$(awk '{print $1}' /proc/sys/kernel/printk)" echo 7 > /proc/sys/kernel/printk $ZFS load-key "${ENCRYPTIONROOT}" echo "$storeprintk" > /proc/sys/kernel/printk fi fi fi return 0 } # Destroy a given filesystem. destroy_fs() { fs="$1" [ "$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 available." echo "Hint: Try: zfs destroy -Rfn $fs" echo "If this dryrun looks good, then remove the 'n' from '-Rfn' and try again." shell else [ "$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 control 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() { snap="$1" destfs="$2" mountpoint="$3" [ "$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 control 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." shell else [ "$quiet" != "y" ] && zfs_log_end_msg fi return 0 } # Rollback a given snapshot. rollback_snap() { snap="$1" [ "$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: $ZFS_ERROR" echo "" echo "Failed to rollback snapshot." shell else [ "$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() { fs="$1" i=1 # We need to temporarily disable debugging. Set 'debug' so we # remember to enabled it again. if [ -n "${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 -r snap; do echo " $i: ${snap}" > /dev/stderr eval "$(echo SNAP_$i=$snap)" i=$((i + 1)) done < /dev/stderr read -r snapnr # Re-enable debugging. if [ -n "${debug}" ]; then ZFS_DEBUG=1 set -x fi echo "$(eval echo '$SNAP_'$snapnr)" } setup_snapshot_booting() { snap="$1" retval=0 # Make sure that the snapshot specified actually exists. if [ ! "$(get_fs_value "${snap}" type)" ] then # Snapshot does not exist (...@ ?) # ask the user for a snapshot to use. snap="$(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)( |$)' /proc/cmdline then # If the destination dataset for the clone # already exists, destroy it. Recursively if [ "$(get_fs_value "${rootfs}_${snapname}" type)" ]; then filesystems=$("${ZFS}" list -oname -tfilesystem -H \ -r -Sname "${ZFS_BOOTFS}") for fs in $filesystems; do destroy_fs "${fs}" done fi fi # Get all snapshots, recursively (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 [ "$mountpoint" = "legacy" ] || \ [ "$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 "${retval}" } # ================================================================ # This is the main function. mountroot() { # ---------------------------------------------------------------- # I N I T I A L S E T U P # ------------ # Run the pre-mount scripts from /scripts/local-top. pre_mountroot # ------------ # Source the default setup variables. [ -r '/etc/default/zfs' ] && . /etc/default/zfs # ------------ # Support debug option if grep -qiE '(^|[^\\](\\\\)* )(zfs_debug|zfs\.debug|zfsdebug)=(on|yes|1)( |$)' /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." shell 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" ] && [ "$USE_DISK_BY_ID" != 'yes' ] && \ unset USE_DISK_BY_ID # ---------------------------------------------------------------- # P A R S E C O M M A N D L I N E O P T I O N S # This part is the really ugly part - there's so many options and permutations # 'out there', and if we should make this the 'primary' source for ZFS initrd # scripting, we need/should support them all. # # Supports the following kernel command line argument combinations # (in this order - first match win): # # rpool= (tries to finds bootfs automatically) # bootfs=/ (uses this for rpool - first part) # rpool= bootfs=/ # -B zfs-bootfs=/ (uses this for rpool - first part) # rpool=rpool (default if none of the above is used) # root=/ (uses this for rpool - first part) # root=ZFS=/ (uses this for rpool - first part, without 'ZFS=') # root=zfs:AUTO (tries to detect both pool and rootfs # root=zfs:/ (uses this for rpool - first part, without 'zfs:') # # Option could also be # Option could also be # ------------ # Support force option # In addition, setting one of zfs_force, zfs.force or zfsforce to # 'yes', 'on' or '1' will make sure we force import the pool. # This should (almost) never be needed, but it's here for # completeness. ZPOOL_FORCE="" if grep -qiE '(^|[^\\](\\\\)* )(zfs_force|zfs\.force|zfsforce)=(on|yes|1)( |$)' /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 "$ROOT" ] && [ -z "${ZFS_BOOTFS}" ] && ZFS_BOOTFS="$ROOT" # ------------ # Check for the `-B zfs-bootfs=%s/%u,...` kind of parameter. # NOTE: Only use the pool name and dataset. The rest is not # supported by OpenZFS (whatever it's for). if [ -z "$ZFS_RPOOL" ] then # The ${zfs-bootfs} variable is set at the kernel command # line, usually by GRUB, but it cannot be referenced here # directly because bourne variable names cannot contain a # hyphen. # # Reassign the variable by dumping the environment and # stripping the zfs-bootfs= prefix. Let the shell handle # quoting through the eval command. eval ZFS_RPOOL=$(set | sed -n -e 's,^zfs-bootfs=,,p') fi # ------------ # No root fs or pool specified - do auto detect. if [ -z "$ZFS_RPOOL" ] && [ -z "${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 [ "$ROOT" = "zfs:AUTO" ] then # Try to detect both pool and root fs. # If we got here, that means we don't have a hint so as to # the root dataset, but with root=zfs:AUTO on cmdline, # this says "zfs:AUTO" here and interferes with checks later ZFS_BOOTFS= [ "$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 IFS="$OLD_IFS" import_pool "$pool" IFS="$OLD_IFS" find_rootfs "$pool" && break 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#*[:=]}" # Strip 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" ] && [ -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 ${ZFS_RPOOL}" shell fi # In case the pool was specified as guid, resolve guid to name pool="$("${ZPOOL}" get name,guid -o name,value -H | \ awk -v pool="${ZFS_RPOOL}" '$2 == pool { print $1 }')" if [ -n "$pool" ]; then # If $ZFS_BOOTFS contains guid, replace the guid portion with $pool ZFS_BOOTFS=$(echo "$ZFS_BOOTFS" | \ sed -e "s/$("${ZPOOL}" get guid -o value "$pool" -H)/$pool/g") ZFS_RPOOL="${pool}" 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 $rootmnt" shell fi # ---------------------------------------------------------------- # M O U N T F I L E S Y S T E M S # * Ideally, the root filesystem would be mounted like this: # # zpool import -R "$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 /proc/self/mounts 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 (recursively) of all filesystems below # the real root dataset filesystems="$("${ZFS}" list -oname -tfilesystem -H -r "${ZFS_BOOTFS}")" OLD_IFS="$IFS" ; IFS=" " for fs in $filesystems; do IFS="$OLD_IFS" mount_fs "$fs" done IFS="$OLD_IFS" for fs in $ZFS_INITRD_ADDITIONAL_DATASETS; do mount_fs "$fs" done touch /run/zfs_unlock_complete if [ -e /run/zfs_unlock_complete_notify ]; then read -r zfs_unlock_complete_notify < /run/zfs_unlock_complete_notify fi # ------------ # 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'. " printf "%s" " 'c' for shell, 'r' for reboot, 'ENTER' to continue. " read -r b [ "$b" = "c" ] && /bin/sh [ "$b" = "r" ] && reboot -f set +x fi # ------------ # Run local bottom script if command -v run_scripts > /dev/null 2>&1 then if [ -f "/scripts/local-bottom" ] || [ -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 fi }