diff options
Diffstat (limited to 'server/setup/01-zfs_linux_bringup/initramfs-tools.scripts.zfs')
| -rw-r--r-- | server/setup/01-zfs_linux_bringup/initramfs-tools.scripts.zfs | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/server/setup/01-zfs_linux_bringup/initramfs-tools.scripts.zfs b/server/setup/01-zfs_linux_bringup/initramfs-tools.scripts.zfs new file mode 100644 index 0000000..328cfca --- /dev/null +++ b/server/setup/01-zfs_linux_bringup/initramfs-tools.scripts.zfs @@ -0,0 +1,163 @@ +# 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 +} |