linux-ext4 - Re: [PATCH] resize2fs: exit fix_sb_journal

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 10 Nov 2009 21:25:01 -0800
From:	Michael Evans <mjevans1983@...il.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>
Subject: Re: [PATCH] resize2fs: exit fix_sb_journal_backup early for external 
	journal

I've run this test case a few times on my system.  It looks like it's
the right thing to do, but before I run it on a drive that actually
has data I care about I'd like to make sure it's doesn't have some
kind of unforeseen side effects.

#!/bin/sh
touch testfs
truncate -s1500M testfs
touch testjournal
truncate -s128M testjournal
LOLOG=`losetup -f`
losetup "${LOLOG}" testjournal
mke2fs -O journal_dev "${LOLOG}"
LOFS=`losetup -f`
losetup "${LOFS}" testfs
mkfs.ext4 -J device="${LOLOG}" "${LOFS}" 200000
mkdir /tmp/testfs
mount "${LOFS}" /tmp/testfs
echo "Filesystem mounted, copying /usr/src/linux/ to (try to) fill the device."
find /usr/src/linux/ -depth -print0 | cpio -p0mud /tmp/testfs
pushd /tmp/testfs
echo "Generating checksums"
find ./ -type f -print0 | xargs -0I = md5sum = > /tmp/check.md5
popd
df | grep "/tmp/testfs"
wc /tmp/check.md5
umount /tmp/testfs
fsck -fy "${LOFS}"
resize2fs "${LOFS}"
fsck -fy "${LOFS}"
./resize/resize2fs "${LOFS}"
mount "${LOFS}" /tmp/testfs
pushd /tmp/testfs
df | grep "/tmp/testfs"
md5sum -c /tmp/check.md5 | sed '/OK[\r\n]*$/d'
if [ "$?" == "0" ] ; then echo "MD5 check PASSED" ; fi
popd
umount /tmp/testfs
rm -rf /tmp/testfs /tmp/check.md5
losetup -d "${LOLOG}"
losetup -d "${LOFS}"
rm testfs testjournal
echo "Cleanup Complete"
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html