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-rwxr-xr-xlibexec/rc/rc.d/growfs313
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diff --git a/libexec/rc/rc.d/growfs b/libexec/rc/rc.d/growfs
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+#!/bin/sh
+#
+# Copyright 2022 Michael J. Karels
+# Copyright 2014 John-Mark Gurney
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+# notice, this list of conditions and the following disclaimer in the
+# documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+#
+
+# PROVIDE: growfs
+# REQUIRE: fsck
+# BEFORE: root
+# KEYWORD: firstboot
+
+# Grow root partition to fill available space, optionally adding a swap
+# partition at the end. This allows us to distribute an image and
+# have it work on essentially any size drive.
+
+# Note that this uses awk(1), and thus will not work if /usr is on a separate
+# filesystem. We need to run early, because there might be not enough free
+# space on rootfs for the boot to succeed, and on images we ship - which are
+# the primary purpose of this script - there is no separate /usr anyway.
+
+. /etc/rc.subr
+
+name="growfs"
+desc="Grow root partition to fill device"
+start_cmd="growfs_start"
+stop_cmd=":"
+rcvar="growfs_enable"
+
+growfs_get_diskdev()
+{
+ local _search=${1}
+ sysctl -b kern.geom.conftxt |
+ while read x1 _type _dev line
+ do
+ if [ "${_type}" = "DISK" -a -n "$(echo ${_search} | grep ${_dev})" ]; then
+ echo -n ${_dev}
+ break
+ fi
+ done
+}
+
+# Compute upper bound on swap partition size (if added), based on physmem
+# and vm.swap_maxpages / 2 (the limit that elicits a warning).
+# Rule for swap size based on memory size:
+# up to 4 GB twice memory size
+# 4 GB - 8 GB 8 GB
+# over 8 GB memory size
+growfs_swap_max()
+{
+ memsize=$(sysctl -n hw.physmem)
+ memsizeMB=$(($memsize / (1024 * 1024)))
+
+ if [ $memsizeMB -lt 4096 ]
+ then
+ swapmax=$(($memsize * 2))
+ elif [ $memsizeMB -lt 8192 ]
+ then
+ swapmax=$((8192 * 1024 * 1024))
+ else
+ swapmax=$memsize
+ fi
+
+ pagesize=$(sysctl -n hw.pagesize)
+ vm_swap_max=$(($(sysctl -n vm.swap_maxpages) / 2 * $pagesize))
+
+ if [ $swapmax -gt $vm_swap_max ]
+ then
+ swapmax=$vm_swap_max
+ fi
+ echo -n "$swapmax"
+}
+
+# Find newly-added swap partition on parent device ($1).
+growfs_last_swap()
+{
+ swapdev=$(gpart list $1 | awk '
+ $2 == "Name:" { dev = $3 }
+ $1 == "type:" && $2 == "freebsd-swap" { swapdev = dev }
+ END { print swapdev }
+ ')
+ echo -n $swapdev
+}
+
+growfs_start()
+{
+ verbose=0
+ echo "Growing root partition to fill device"
+ FSTYPE=$(mount -p | awk '{ if ( $2 == "/") { print $3 }}')
+ FSDEV=$(mount -p | awk '{ if ( $2 == "/") { print $1 }}')
+ case "$FSTYPE" in
+ ufs)
+ rootdev=${FSDEV#/dev/}
+ ;;
+ zfs)
+ pool=${FSDEV%%/*}
+ rootdev=$(zpool list -v $pool | awk 'END { print $1 }')
+ ;;
+ *)
+ echo "Don't know how to grow root filesystem type: $FSTYPE"
+ return
+ esac
+ if [ x"$rootdev" = x"${rootdev%/*}" ]; then
+ # raw device
+ rawdev="$rootdev"
+ else
+ rawdev=$(glabel status | awk -v rootdev=$rootdev 'index(rootdev, $1) { print $3; }')
+ if [ x"$rawdev" = x"" ]; then
+ echo "Can't figure out device for: $rootdev"
+ return
+ fi
+ fi
+
+ if [ x"diskid" = x"${rootdev%/*}" ]; then
+ search=$rootdev
+ else
+ search=$rawdev
+ fi
+
+ diskdev=$(growfs_get_diskdev ${search})
+ if [ -z "${diskdev}" ]; then
+ diskdev=${rootdev}
+ fi
+
+ # Check kenv for growfs_swap_size; if not present,
+ # check $growfs_swap_size from /etc/rc.conf.
+ # A value of 0 suppresses swap addition,
+ # "" (or unset) specifies the default;
+ # other values indicate the size in bytes.
+ # If default, check whether swap is already in fstab;
+ # if so, don't add another.
+ addswap=1
+ swapsize="$(kenv -q growfs_swap_size 2>/dev/null)"
+ case "$swapsize" in
+ "0") addswap=0
+ ;;
+ "") case "$growfs_swap_size" in
+ "0") addswap=0
+ ;;
+ "")
+ if ! awk '
+ /^#/ { next }
+ $3 == "swap" { exit 1 }
+ ' < /etc/fstab
+ then
+ addswap=0
+ fi
+ ;;
+ *) swapsize="$growfs_swap_size"
+ ;;
+ esac
+ ;;
+ *) ;;
+ esac
+
+ swaplim=$(growfs_swap_max)
+
+ [ $verbose -eq 1 ] && {
+ echo "diskdev is $diskdev"
+ echo "search is $search"
+ echo "swapsize is $swapsize"
+ echo "swaplim is $swaplim"
+ }
+
+ sysctl -b kern.geom.conftxt | awk '
+{
+ verbose = 0
+ lvl=$1
+ device[lvl] = $3
+ type[lvl] = $2
+ idx[lvl] = $7
+ offset[lvl] = $9
+ parttype[lvl] = $13
+ size[lvl] = $4
+ if (verbose) print lvl, type[lvl], $3
+ if (type[lvl] == "DISK") {
+ disksize = size[lvl]
+ if (verbose)
+ print "disksize ", disksize
+ # Do not add swap on disks under 15 GB (decimal) by default.
+ if (addswap == 1 && (size[lvl] > 15000000000 || swapsize > 0))
+ doing_swap = 1
+ else
+ doing_swap = 0
+ } else if (type[lvl] == "PART" && $11 == "freebsd-swap" && \
+ int(swapsize) == 0) {
+ # This finds swap only if it precedes root, e.g. preceding disk.
+ addswap = 0
+ doing_swap = 0
+ print "swap device exists, not adding swap"
+ }
+ if (dev == $3) {
+ for (i = 1; i <= lvl; i++) {
+ # resize
+ if (type[i] == "PART") {
+ pdev = device[i - 1]
+ if (verbose)
+ print i, pdev, addswap, disksize, \
+ doing_swap
+ swapcmd = ""
+ # Allow swap if current root is < 40% of disk.
+ if (parttype[i] != "MBR" && doing_swap == 1 && \
+ (size[i] / disksize < 0.4 || \
+ swapsize > 0)) {
+ print "Adding swap partition"
+ if (int(swapsize) == 0) {
+ swapsize = int(disksize / 10)
+ if (swapsize > swaplim)
+ swapsize = swaplim
+ }
+ sector = $5
+ swapsize /= sector
+ if (verbose)
+ print "swapsize sectors",
+ swapsize
+ align = 4 * 1024 * 1024 / sector
+
+ # Estimate offset for swap; let
+ # gpart compute actual start and size.
+ # Assume expansion all goes into this
+ # partition for MBR case.
+ if (parttype[i - 1] == "MBR") {
+ if (verbose)
+ print "sz ", size[i - 1], \
+ " off ", offset[i - 1]
+ expand = size[0] - \
+ (size[i - 1] + offset[i - 1])
+ } else {
+ if (verbose)
+ print "sz ", size[i], \
+ " off ", offset[i]
+ expand = size[0] - \
+ (size[i] + offset[i])
+ }
+ if (verbose)
+ print "expand ", expand, \
+ " sz ", size[i]
+ swapbase = (expand + size[i]) / sector
+ swapbase -= swapsize + align
+ swapcmd = "gpart add -t freebsd-swap -a " align " -b " int(swapbase) " " pdev " && kenv growfs_swap_pdev=" pdev " >/dev/null; "
+ if (verbose)
+ swapcmd = "set -x; gpart show; " swapcmd
+ }
+ cmd[i] = swapcmd "gpart resize -i " idx[i] " " pdev
+ if (parttype[i] == "GPT")
+ cmd[i] = "gpart recover " pdev " ; " cmd[i]
+ } else if (type[i] == "LABEL") {
+ continue
+ } else {
+ print "unhandled type: " type[i]
+ exit 1
+ }
+ }
+ for (i = 1; i <= lvl; i++) {
+ if (cmd[i])
+ system(cmd[i])
+ }
+ exit 0
+ }
+}' dev="$search" addswap="$addswap" swapsize="$swapsize" swaplim="$swaplim"
+ gpart commit "$diskdev" 2> /dev/null
+ case "$FSTYPE" in
+ ufs)
+ growfs -y /dev/"$rootdev"
+ ;;
+ zfs)
+ zpool online -e $pool $rootdev
+ ;;
+ esac
+
+ # Get parent device of swap partition if one was added;
+ # if so, find swap device and label it.
+ pdev=$(kenv -q growfs_swap_pdev)
+ if [ -n "$pdev" ]
+ then
+ dev=$(growfs_last_swap "$pdev")
+ if [ -z "$dev" ]
+ then
+ echo "Swap partition not found on $pdev"
+ exit 0
+ fi
+ glabel label -v growfs_swap $dev
+ fi
+}
+
+load_rc_config $name
+
+# doesn't make sense to run in a svcj: config setting
+growfs_svcj="NO"
+
+run_rc_command "$1"