zfsboottest.sh revision 227705 
1#!/bin/sh
2#
3# Copyright (c) 2011 Pawel Jakub Dawidek <pawel@dawidek.net>
4# All rights reserved.
5#
6# Redistribution and use in source and binary forms, with or without
7# modification, are permitted provided that the following conditions
8# are met:
9# 1. Redistributions of source code must retain the above copyright
10#    notice, this list of conditions and the following disclaimer.
11# 2. Redistributions in binary form must reproduce the above copyright
12#    notice, this list of conditions and the following disclaimer in the
13#    documentation and/or other materials provided with the distribution.
14#
15# THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
16# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
19# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25# SUCH DAMAGE.
26#
27# $FreeBSD: stable/9/tools/tools/zfsboottest/zfsboottest.sh 227705 2011-11-19 10:49:03Z pjd $
28
29if [ $# -ne 1 ]; then
30	echo "usage: zfsboottest.sh <pool>" >&2
31	exit 1
32fi
33
34which -s zfsboottest
35if [ $? -eq 0 ]; then
36	zfsboottest="zfsboottest"
37else
38	if [ ! -x "/usr/src/tools/tools/zfsboottest/zfsboottest" ]; then
39		echo "Unable to find \"zfsboottest\" utility." >&2
40		exit 1
41	fi
42	zfsboottest="/usr/src/tools/tools/zfsboottest/zfsboottest"
43fi
44
45startdir="/boot"
46
47pool="${1}"
48zpool list "${pool}" >/dev/null 2>&1
49if [ $? -ne 0 ]; then
50	echo "No such pool \"${pool}\"." >&2
51	exit 1
52fi
53bootfs=`zpool get bootfs "${pool}" | tail -1 | awk '{print $3}'`
54if [ "${bootfs}" = "-" ]; then
55	echo "The \"bootfs\" property is not configured for pool \"${pool}\"." >&2
56	exit 1
57fi
58# Dataset's mountpoint property should be set to 'legacy'.
59if [ "`zfs get -H -o value mountpoint ${bootfs}`" != "legacy" ]; then
60	echo "The \"mountpoint\" property of dataset \"${bootfs}\" should be set to \"legacy\"." >&2
61	exit 1
62fi
63mountpoint=`df -t zfs "${bootfs}" 2>/dev/null | tail -1 | awk '{print $6}'`
64if [ -z "${mountpoint}" ]; then
65	echo "The \"${bootfs}\" dataset is not mounted." >&2
66	exit 1
67fi
68if [ ! -d "${mountpoint}${startdir}" ]; then
69	echo "The \"${mountpoint}${startdir}\" directory doesn't exist." >&2
70	exit 1
71fi
72# To be able to mount root ZFS file system we need either /etc/fstab entry
73# or vfs.root.mountfrom variable set in /boot/loader.conf.
74egrep -q '^'"${bootfs}"'[[:space:]]+/[[:space:]]+zfs[[:space:]]+' "${mountpoint}/etc/fstab" 2>/dev/null
75if [ $? -ne 0 ]; then
76	egrep -q 'vfs.root.mountfrom="?'"${bootfs}"'"?[[:space:]]*$' "${mountpoint}/boot/loader.conf" 2>/dev/null
77	if [ $? -ne 0 ]; then
78		echo "To be able to boot from \"${bootfs}\", you need to declare" >&2
79		echo "\"${bootfs}\" as being root file system in ${mountpoint}/etc/fstab" >&2
80		echo "or add \"vfs.root.mountfrom\" variable set to \"${bootfs}\" to" >&2
81		echo "${mountpoint}/boot/loader.conf." >&2
82		exit 1
83	fi
84fi
85vdevs=""
86for vdev in `zpool status "${pool}" | grep ONLINE | awk '{print $1}'`; do
87	vdev="/dev/${vdev#/dev/}"
88	if [ -c "${vdev}" ]; then
89		if [ -z "${vdevs}" ]; then
90			vdevs="${vdev}"
91		else
92			vdevs="${vdevs} ${vdev}"
93		fi
94	fi
95done
96
97list0=`mktemp /tmp/zfsboottest.XXXXXXXXXX`
98if [ $? -ne 0 ]; then
99	echo "Unable to create temporary file." >&2
100	exit 1
101fi
102list1=`mktemp /tmp/zfsboottest.XXXXXXXXXX`
103if [ $? -ne 0 ]; then
104	echo "Unable to create temporary file." >&2
105	rm -f "${list0}"
106	exit 1
107fi
108
109echo "zfsboottest.sh is reading all the files in ${mountpoint}${startdir} using"
110echo "boot code and using file system code."
111echo "It calculates MD5 checksums for all the files and will compare them."
112echo "If all files can be properly read using boot code, it is very likely you"
113echo "will be able to boot from \"${pool}\" pool>:> Good luck!"
114echo
115
116"${zfsboottest}" ${vdevs} - `find "${mountpoint}${startdir}" -type f | sed "s@^${mountpoint}@@"` | egrep '^[0-9a-z]{32} /' | sort -k 2 >"${list0}"
117find "${mountpoint}${startdir}" -type f | xargs md5 -r | sed "s@ ${mountpoint}@ @" | egrep '^[0-9a-z]{32} /' | sort -k 2 >"${list1}"
118
119diff -u "${list0}" "${list1}"
120ec=$?
121
122rm -f "${list0}" "${list1}"
123
124if [ $? -ne 0 ]; then
125	echo >&2
126	echo "You may not be able to boot." >&2
127	exit 1
128fi
129
130echo "OK"
131