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