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https://github.com/freebsd/freebsd-src
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f99f0ee14e
This gives more permissions to services (e.g. network access to services which require this) when they are started as an automatic service jail. The sshd patch is important for the sshd-related functionality as described in the man-page in the service jails part. The location of the added env vars is supposed to allow overriding them in rc.conf, and to hard-disable the use of svcj for some parts where it doesn't make sense or will not work. Only a subset of all of the services are fully tested (I'm running this since more than a year with various services started as service jails). The untested parts should be most of the time ok, in some edge-cases more permissions are needed inside the service jail. Differential Revision: https://reviews.freebsd.org/D40371
314 lines
8 KiB
Bash
Executable file
314 lines
8 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright 2022 Michael J. Karels
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# Copyright 2014 John-Mark Gurney
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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#
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# PROVIDE: growfs
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# REQUIRE: fsck
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# BEFORE: root
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# KEYWORD: firstboot
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# Grow root partition to fill available space, optionally adding a swap
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# partition at the end. This allows us to distribute an image and
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# have it work on essentially any size drive.
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# Note that this uses awk(1), and thus will not work if /usr is on a separate
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# filesystem. We need to run early, because there might be not enough free
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# space on rootfs for the boot to succeed, and on images we ship - which are
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# the primary purpose of this script - there is no separate /usr anyway.
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. /etc/rc.subr
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name="growfs"
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desc="Grow root partition to fill device"
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start_cmd="growfs_start"
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stop_cmd=":"
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rcvar="growfs_enable"
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growfs_get_diskdev()
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{
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local _search=${1}
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sysctl -b kern.geom.conftxt |
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while read x1 _type _dev line
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do
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if [ "${_type}" = "DISK" -a -n "$(echo ${_search} | grep ${_dev})" ]; then
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echo -n ${_dev}
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break
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fi
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done
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}
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# Compute upper bound on swap partition size (if added), based on physmem
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# and vm.swap_maxpages / 2 (the limit that elicits a warning).
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# Rule for swap size based on memory size:
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# up to 4 GB twice memory size
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# 4 GB - 8 GB 8 GB
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# over 8 GB memory size
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growfs_swap_max()
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{
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memsize=$(sysctl -n hw.physmem)
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memsizeMB=$(($memsize / (1024 * 1024)))
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if [ $memsizeMB -lt 4096 ]
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then
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swapmax=$(($memsize * 2))
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elif [ $memsizeMB -lt 8192 ]
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then
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swapmax=$((8192 * 1024 * 1024))
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else
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swapmax=$memsize
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fi
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pagesize=$(sysctl -n hw.pagesize)
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vm_swap_max=$(($(sysctl -n vm.swap_maxpages) / 2 * $pagesize))
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if [ $swapmax -gt $vm_swap_max ]
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then
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swapmax=$vm_swap_max
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fi
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echo -n "$swapmax"
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}
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# Find newly-added swap partition on parent device ($1).
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growfs_last_swap()
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{
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swapdev=$(gpart list $1 | awk '
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$2 == "Name:" { dev = $3 }
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$1 == "type:" && $2 == "freebsd-swap" { swapdev = dev }
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END { print swapdev }
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')
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echo -n $swapdev
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}
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growfs_start()
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{
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verbose=0
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echo "Growing root partition to fill device"
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FSTYPE=$(mount -p | awk '{ if ( $2 == "/") { print $3 }}')
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FSDEV=$(mount -p | awk '{ if ( $2 == "/") { print $1 }}')
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case "$FSTYPE" in
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ufs)
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rootdev=${FSDEV#/dev/}
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;;
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zfs)
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pool=${FSDEV%%/*}
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rootdev=$(zpool list -v $pool | awk 'END { print $1 }')
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;;
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*)
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echo "Don't know how to grow root filesystem type: $FSTYPE"
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return
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esac
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if [ x"$rootdev" = x"${rootdev%/*}" ]; then
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# raw device
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rawdev="$rootdev"
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else
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rawdev=$(glabel status | awk -v rootdev=$rootdev 'index(rootdev, $1) { print $3; }')
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if [ x"$rawdev" = x"" ]; then
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echo "Can't figure out device for: $rootdev"
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return
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fi
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fi
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if [ x"diskid" = x"${rootdev%/*}" ]; then
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search=$rootdev
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else
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search=$rawdev
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fi
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diskdev=$(growfs_get_diskdev ${search})
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if [ -z "${diskdev}" ]; then
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diskdev=${rootdev}
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fi
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# Check kenv for growfs_swap_size; if not present,
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# check $growfs_swap_size from /etc/rc.conf.
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# A value of 0 suppresses swap addition,
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# "" (or unset) specifies the default;
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# other values indicate the size in bytes.
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# If default, check whether swap is already in fstab;
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# if so, don't add another.
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addswap=1
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swapsize="$(kenv -q growfs_swap_size 2>/dev/null)"
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case "$swapsize" in
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"0") addswap=0
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;;
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"") case "$growfs_swap_size" in
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"0") addswap=0
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;;
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"")
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if ! awk '
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/^#/ { next }
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$3 == "swap" { exit 1 }
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' < /etc/fstab
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then
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addswap=0
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fi
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;;
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*) swapsize="$growfs_swap_size"
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;;
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esac
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;;
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*) ;;
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esac
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swaplim=$(growfs_swap_max)
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[ $verbose -eq 1 ] && {
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echo "diskdev is $diskdev"
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echo "search is $search"
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echo "swapsize is $swapsize"
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echo "swaplim is $swaplim"
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}
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sysctl -b kern.geom.conftxt | awk '
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{
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verbose = 0
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lvl=$1
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device[lvl] = $3
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type[lvl] = $2
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idx[lvl] = $7
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offset[lvl] = $9
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parttype[lvl] = $13
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size[lvl] = $4
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if (verbose) print lvl, type[lvl], $3
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if (type[lvl] == "DISK") {
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disksize = size[lvl]
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if (verbose)
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print "disksize ", disksize
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# Do not add swap on disks under 15 GB (decimal) by default.
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if (addswap == 1 && (size[lvl] > 15000000000 || swapsize > 0))
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doing_swap = 1
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else
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doing_swap = 0
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} else if (type[lvl] == "PART" && $11 == "freebsd-swap" && \
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int(swapsize) == 0) {
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# This finds swap only if it precedes root, e.g. preceding disk.
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addswap = 0
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doing_swap = 0
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print "swap device exists, not adding swap"
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}
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if (dev == $3) {
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for (i = 1; i <= lvl; i++) {
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# resize
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if (type[i] == "PART") {
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pdev = device[i - 1]
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if (verbose)
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print i, pdev, addswap, disksize, \
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doing_swap
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swapcmd = ""
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# Allow swap if current root is < 40% of disk.
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if (parttype[i] != "MBR" && doing_swap == 1 && \
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(size[i] / disksize < 0.4 || \
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swapsize > 0)) {
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print "Adding swap partition"
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if (int(swapsize) == 0) {
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swapsize = int(disksize / 10)
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if (swapsize > swaplim)
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swapsize = swaplim
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}
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sector = $5
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swapsize /= sector
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if (verbose)
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print "swapsize sectors",
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swapsize
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align = 4 * 1024 * 1024 / sector
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# Estimate offset for swap; let
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# gpart compute actual start and size.
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# Assume expansion all goes into this
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# partition for MBR case.
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if (parttype[i - 1] == "MBR") {
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if (verbose)
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print "sz ", size[i - 1], \
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" off ", offset[i - 1]
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expand = size[0] - \
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(size[i - 1] + offset[i - 1])
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} else {
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if (verbose)
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print "sz ", size[i], \
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" off ", offset[i]
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expand = size[0] - \
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(size[i] + offset[i])
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}
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if (verbose)
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print "expand ", expand, \
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" sz ", size[i]
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swapbase = (expand + size[i]) / sector
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swapbase -= swapsize + align
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swapcmd = "gpart add -t freebsd-swap -a " align " -b " int(swapbase) " " pdev " && kenv growfs_swap_pdev=" pdev " >/dev/null; "
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if (verbose)
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swapcmd = "set -x; gpart show; " swapcmd
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}
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cmd[i] = swapcmd "gpart resize -i " idx[i] " " pdev
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if (parttype[i] == "GPT")
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cmd[i] = "gpart recover " pdev " ; " cmd[i]
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} else if (type[i] == "LABEL") {
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continue
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} else {
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print "unhandled type: " type[i]
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exit 1
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}
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}
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for (i = 1; i <= lvl; i++) {
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if (cmd[i])
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system(cmd[i])
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}
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exit 0
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}
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}' dev="$search" addswap="$addswap" swapsize="$swapsize" swaplim="$swaplim"
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gpart commit "$diskdev" 2> /dev/null
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case "$FSTYPE" in
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ufs)
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growfs -y /dev/"$rootdev"
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;;
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zfs)
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zpool online -e $pool $rootdev
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;;
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esac
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# Get parent device of swap partition if one was added;
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# if so, find swap device and label it.
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pdev=$(kenv -q growfs_swap_pdev)
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if [ -n "$pdev" ]
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then
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dev=$(growfs_last_swap "$pdev")
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if [ -z "$dev" ]
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then
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echo "Swap partition not found on $pdev"
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exit 0
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fi
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glabel label -v growfs_swap $dev
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fi
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}
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load_rc_config $name
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# doesn't make sense to run in a svcj: config setting
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growfs_svcj="NO"
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run_rc_command "$1"
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