Date: Thu, 22 May 2003 11:38:54 -0700 (PDT) From: Doug Barton <dougb@FreeBSD.org> To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sbin/newfs mkfs.c Message-ID: <200305221838.h4MIcsnQ058981@repoman.freebsd.org>
next in thread | raw e-mail | index | archive | help
dougb 2003/05/22 11:38:54 PDT
FreeBSD src repository
Modified files:
sbin/newfs mkfs.c
Log:
When newfs'ing a partition with UFS2 that had previously been newfs'ed
with UFS1, the UFS1 superblocks were not deleted. This allowed any
RELENG_4 (or other non-UFS2-aware) fsck to think it knew how to "fix"
the file system, resulting in severe data scrambling.
This patch is a more advanced version than the one originally submitted.
Lukas improved it based on feedback from Kirk, and testing by me. It
blanks all UFS1 superblocks (if any) during a UFS2 newfs, thereby causing
fsck's that are not UFS2 aware to generate the "SEARCH FOR ALTERNATE
SUPER-BLOCK FAILED" message, and exit without damaging the fs.
PR: bin/51619
Submitted by: Lukas Ertl <l.ertl@univie.ac.at>
Reviewed by: kirk
Approved by: re (scottl)
Revision Changes Path
1.77 +24 -0 src/sbin/newfs/mkfs.c
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?200305221838.h4MIcsnQ058981>