forked from extern/nixos-installer
168 lines
11 KiB
Bash
168 lines
11 KiB
Bash
|
|
## Creates all of the system's ZFS pools that are »createDuringInstallation«, plus their datasets.
|
|
function create-zpools { # 1: mnt
|
|
local poolName ; for poolName in "@{!config.setup.zfs.pools[@]}" ; do
|
|
if [[ ! @{config.setup.zfs.pools!catAttrSets.createDuringInstallation[$poolName]} ]] ; then continue ; fi
|
|
create-zpool "$1" "$poolName"
|
|
done
|
|
}
|
|
|
|
|
|
declare-command create-zpool mnt poolName << 'EOD'
|
|
Creates a single of the system's ZFS pools, and its datasets. Can be called manually to create pools that were added to the configuration, or to create those declared with »createDuringInstallation = false«. Expects the backing device(-partition)s to exist as declared for the pool.
|
|
EOD
|
|
declare-flag install-system zpool-force "" "(create-zpool) When creating ZFS storage pools, pass the »-f« (force) option. This may be required when installing to disks that are currently part of a pool, or ZFS refuses do reuse them."
|
|
function create-zpool {
|
|
local mnt=$1 ; local poolName=$2
|
|
eval 'local -A pool='"@{config.setup.zfs.pools[$poolName]}"
|
|
eval 'local -a vdevs='"${pool[vdevArgs]}"
|
|
eval 'local -A poolProps='"${pool[props]}"
|
|
eval 'local -A dataset='"@{config.setup.zfs.datasets[${pool[name]}]}"
|
|
eval 'local -A dataProps='"${dataset[props]}"
|
|
local dummy ; get-zfs-crypt-props "${dataset[name]}" dataProps dummy dummy
|
|
local -a zpoolCreate=( ) ; keySrc=/dev/null
|
|
if [[ ${dataProps[keyformat]:-} == ephemeral ]] ; then
|
|
dataProps[encryption]=aes-256-gcm ; dataProps[keyformat]=hex ; dataProps[keylocation]=file:///dev/stdin ; keySrc=/dev/urandom
|
|
fi
|
|
local name ; for name in "${!poolProps[@]}" ; do zpoolCreate+=( -o "${name}=${poolProps[$name]}" ) ; done
|
|
local name ; for name in "${!dataProps[@]}" ; do zpoolCreate+=( -O "${name}=${dataProps[$name]}" ) ; done
|
|
local index ; for index in "${!vdevs[@]}" ; do
|
|
part=${vdevs[$index]} ; if [[ $part =~ ^(mirror|raidz[123]?|draid[123]?.*|spare|log|dedup|special|cache)$ ]] ; then continue ; fi
|
|
if [[ @{config.boot.initrd.luks.devices!catAttrSets.device[$part]:-} ]] ; then
|
|
vdevs[$index]=/dev/mapper/$part
|
|
else
|
|
part=/dev/disk/by-partlabel/$part ; vdevs[$index]=$part
|
|
if ! is-partition-on-disks "$part" "${blockDevs[@]}" ; then echo "Partition alias $part used by zpool ${pool[name]} does not point at one of the target disks ${blockDevs[@]}" 1>&2 ; \return 1 ; fi
|
|
fi
|
|
done
|
|
@{native.kmod}/bin/modprobe zfs || true
|
|
<$keySrc @{native.xxd}/bin/xxd -l 32 -c 64 -p | ( PATH=@{native.zfs}/bin ; ${_set_x:-:} ; zpool create ${args[zpool-force]:+-f} "${zpoolCreate[@]}" -R "$mnt" "${pool[name]}" "${vdevs[@]}" ) || return
|
|
prepend_trap "@{native.zfs}/bin/zpool export '$poolName'" EXIT || return
|
|
if [[ $keySrc == /dev/urandom ]] ; then @{native.zfs}/bin/zfs unload-key "$poolName" &>/dev/null ; fi
|
|
|
|
ensure-datasets $mnt '^'"$poolName"'($|[/])' || return
|
|
if [[ ${args[debug]:-} ]] ; then @{native.zfs}/bin/zfs list -o name,canmount,mounted,mountpoint,keystatus,encryptionroot -r "$poolName" ; fi
|
|
}
|
|
|
|
declare-command ensure-datasets mnt filterExp? << 'EOD'
|
|
Ensures that the system's datasets exist and have the defined properties (but not that they don't have properties that aren't defined).
|
|
The pool(s) must exist, be imported with root prefix »$mnt«, and (if datasets are to be created or encryption roots to be inherited) the system's keystore must be open (see »mount-keystore-luks«) or the keys must be loaded.
|
|
»keystatus« and »mounted« of existing datasets should remain unchanged by this function, newly crated datasets will not be mounted but have their keys loaded.
|
|
EOD
|
|
function ensure-datasets {
|
|
if (( @{#config.setup.zfs.datasets[@]} == 0 )) ; then \return ; fi
|
|
local mnt=$1 ; while [[ "$mnt" == */ ]] ; do mnt=${mnt:0:(-1)} ; done # (remove any tailing slashes)
|
|
local filterExp=${2:-'^'}
|
|
local zfs=@{native.zfs}/bin/zfs
|
|
|
|
local name ; while IFS= read -u3 -r -d $'\0' name ; do
|
|
if [[ ! $name =~ $filterExp ]] ; then printf 'Skipping dataset »%s« since it does not match »%s«\n' "$name" "$filterExp" >&2 ; continue ; fi
|
|
|
|
eval 'local -A dataset='"@{config.setup.zfs.datasets[$name]}"
|
|
eval 'local -A props='"${dataset[props]}"
|
|
|
|
local explicitKeylocation=${props[keylocation]:-} cryptKey cryptRoot
|
|
get-zfs-crypt-props "${dataset[name]}" props cryptKey cryptRoot
|
|
|
|
if $zfs get -o value -H name "${dataset[name]}" &>/dev/null ; then # dataset exists: check its properties
|
|
|
|
if [[ ${props[mountpoint]:-} ]] ; then # don't set the current mount point again (no-op), cuz that fails if the dataset is mounted
|
|
local current=$($zfs get -o value -H mountpoint "${dataset[name]}") ; current=${current/$mnt/}
|
|
if [[ ${props[mountpoint]} == "${current:-/}" ]] ; then unset props[mountpoint] ; fi
|
|
fi
|
|
if [[ ${props[keyformat]:-} == ephemeral ]] ; then
|
|
cryptRoot= ; unset props[keyformat] ; props[keylocation]=file:///dev/null
|
|
fi
|
|
if [[ $explicitKeylocation ]] ; then props[keylocation]=$explicitKeylocation ; fi
|
|
unset props[encryption] ; unset props[keyformat] # can't change these anyway
|
|
|
|
function ensure-props { # 1: datasetName
|
|
local datasetName=$1
|
|
local propNames=$( IFS=, ; echo "${!props[*]}" )
|
|
local propValues=$( IFS=$'\n' ; echo "${props[*]}" )
|
|
if [[ $propValues != "$( $zfs get -o value -H "$propNames" "$datasetName" )" ]] ; then
|
|
local -a zfsSet=( ) ; local propName ; for propName in "${!props[@]}" ; do zfsSet+=( "${propName}=${props[$propName]}" ) ; done
|
|
( PATH=@{native.zfs}/bin ; ${_set_x:-:} ; zfs set "${zfsSet[@]}" "$datasetName" ) || return
|
|
fi
|
|
if [[ $cryptRoot && $( $zfs get -o value -H encryptionroot "$datasetName" ) != "$cryptRoot" ]] ; then ( # inherit key from parent (which the parent would also already have done if necessary)
|
|
if [[ $( $zfs get -o value -H keystatus "$cryptRoot" ) != available ]] ; then
|
|
$zfs load-key -L file://"$cryptKey" "$cryptRoot" || exit ; trap "$zfs unload-key $cryptRoot || true" EXIT
|
|
fi
|
|
if [[ $( $zfs get -o value -H keystatus "$datasetName" ) != available ]] ; then
|
|
$zfs load-key -L file://"$cryptKey" "$datasetName" || exit # will unload with cryptRoot
|
|
fi
|
|
( PATH=@{native.zfs}/bin ; ${_set_x:-:} ; zfs change-key -i "$datasetName" ) || exit
|
|
) || return ; fi
|
|
}
|
|
ensure-props "${dataset[name]}" || return
|
|
|
|
if [[ ${dataset[recursiveProps]:-} ]] ; then
|
|
if [[ ${props[mountpoint]:-} != none ]] ; then unset props[mountpoint] ; fi
|
|
while IFS= read -u3 -r name ; do
|
|
ensure-props "$name" || return
|
|
done 3< <( $zfs list -H -o name -r "${dataset[name]}" | LC_ALL=C sort | tail -n +2 )
|
|
fi
|
|
|
|
else ( # create dataset
|
|
if [[ ${props[keyformat]:-} == ephemeral ]] ; then
|
|
props[encryption]=aes-256-gcm ; props[keyformat]=hex ; props[keylocation]=file:///dev/stdin ; explicitKeylocation=file:///dev/null
|
|
declare -a zfsCreate=( ) ; for name in "${!props[@]}" ; do zfsCreate+=( -o "${name}=${props[$name]}" ) ; done
|
|
{ </dev/urandom tr -dc 0-9a-f || true ; } | head -c 64 | ( PATH=@{native.zfs}/bin ; ${_set_x:-:} ; zfs create "${zfsCreate[@]}" "${dataset[name]}" ) || exit
|
|
$zfs unload-key "${dataset[name]}" || exit
|
|
else
|
|
if [[ $cryptRoot && $cryptRoot != ${dataset[name]} && $($zfs get -o value -H keystatus "$cryptRoot") != available ]] ; then
|
|
$zfs load-key -L file://"$cryptKey" "$cryptRoot" || exit
|
|
trap "$zfs unload-key $cryptRoot || true" EXIT
|
|
fi
|
|
declare -a zfsCreate=( ) ; for name in "${!props[@]}" ; do zfsCreate+=( -o "${name}=${props[$name]}" ) ; done
|
|
( PATH=@{native.zfs}/bin ; ${_set_x:-:} ; zfs create "${zfsCreate[@]}" "${dataset[name]}" ) || exit
|
|
fi
|
|
if [[ ${props[canmount]} != off ]] ; then (
|
|
tmpMnt=$(mktemp -d) ; trap "" EXIT && @{native.util-linux}/bin/mount -t zfs -o zfsutil "${dataset[name]}" $tmpMnt &&
|
|
trap "@{native.util-linux}/bin/umount '${dataset[name]}' ; rmdir $tmpMnt" EXIT &&
|
|
chmod 000 -- "$tmpMnt" && chown "${dataset[uid]}:${dataset[gid]}" -- "$tmpMnt" && chmod "${dataset[mode]}" -- "$tmpMnt"
|
|
) || exit ; fi
|
|
if [[ $explicitKeylocation && $explicitKeylocation != "${props[keylocation]:-}" ]] ; then
|
|
( PATH=@{native.zfs}/bin ; ${_set_x:-:} ; zfs set keylocation="$explicitKeylocation" "${dataset[name]}" ) || exit
|
|
fi
|
|
$zfs snapshot -r "${dataset[name]}"@empty || exit
|
|
) || return ; fi
|
|
|
|
eval 'local -A allows='"${dataset[permissions]}"
|
|
for who in "${!allows[@]}" ; do
|
|
# »zfs allow $dataset« seems to be the only way to view permissions, and that is not very parsable -.-
|
|
( PATH=@{native.zfs}/bin ; ${_set_x:-:} ; zfs allow -$who "${allows[$who]}" "${dataset[name]}" >&2 ) || return
|
|
done
|
|
done 3< <( printf '%s\0' "@{!config.setup.zfs.datasets[@]}" | LC_ALL=C sort -z )
|
|
}
|
|
|
|
## Given the name (»datasetPath«) of a ZFS dataset, this deducts crypto-related options from the declared keys (»config.setup.keystore.keys."zfs/..."«).
|
|
function get-zfs-crypt-props { # 1: datasetPath, 2?: name_cryptProps, 3?: name_cryptKey, 4?: name_cryptRoot
|
|
local hash=@{config.networking.hostName!hashString.sha256:0:8}
|
|
local keystore=/run/keystore-$hash
|
|
local -n __cryptProps=${2:-props} ; local -n __cryptKey=${3:-cryptKey} ; local -n __cryptRoot=${4:-cryptRoot}
|
|
|
|
local name=$1 ; {
|
|
if [[ $name == */* ]] ; then local pool=${name/\/*/}/ ; local path=/${name/$pool/} ; else local pool=$name/ ; local path= ; fi
|
|
} ; local key=${pool/-$hash'/'/}$path # strip hash from pool name
|
|
|
|
__cryptKey='' ; __cryptRoot=''
|
|
if [[ @{config.setup.keystore.keys[zfs/$name]:-} ]] ; then
|
|
if [[ @{config.setup.keystore.keys[zfs/$name]} == unencrypted ]] ; then
|
|
__cryptProps[encryption]=off # empty key to disable encryption
|
|
else
|
|
__cryptProps[encryption]=aes-256-gcm ; __cryptProps[keyformat]=hex ; __cryptProps[keylocation]=file://"$keystore"/zfs/"$name".key
|
|
__cryptKey=$keystore/zfs/$name.key ; __cryptRoot=$name
|
|
fi
|
|
else
|
|
while true ; do
|
|
name=$(dirname $name) ; if [[ $name == . ]] ; then break ; fi
|
|
if [[ @{config.setup.keystore.keys[zfs/$name]:-} ]] ; then
|
|
if [[ @{config.setup.keystore.keys[zfs/$name]} != unencrypted ]] ; then
|
|
__cryptKey=$keystore/zfs/$name.key ; __cryptRoot=$name
|
|
fi ; break
|
|
fi
|
|
done
|
|
fi
|
|
}
|