linux-kernel - Re: [git pull] first batch of ufs fixes

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Date:   Mon, 12 Jun 2017 17:54:06 -0700 (PDT)
From:   Richard Narron <comet.berkeley@...il.com>
To:     Al Viro <viro@...IV.linux.org.uk>
cc:     Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: [git pull] first batch of ufs fixes

On Mon, 12 Jun 2017, Al Viro wrote:

> On Sun, Jun 11, 2017 at 12:47:40PM -0700, Richard Narron wrote:
>> 1) Creating an OpenBSD 6.1 (44bsd) disk and then on Linux copying a large >
>> 2GB file and creating a directory, there are errors on OpenBSD
>> with the fsck:
>>
>
> Can't reproduce...
> # fsck -f /dev/rwd1c
> ** /dev/rwd1c
> ** File system is already clean
> ** Last Mounted on
> ** Phase 1 - Check Blocks and Sizes
> ** Phase 2 - Check Pathnames
> ** Phase 3 - Check Connectivity
> ** Phase 4 - Check Reference Counts
> ** Phase 5 - Check Cyl groups
> 3 files, 1573258 used, 489445 free (13 frags, 61179 blocks, 0.0% fragmentation)
> # uname -mrsv
> OpenBSD 6.1 GENERIC#19 amd64
> # file -s /dev/rwd1c
> /dev/rwd1c: Unix Fast File system [v1] (little-endian), last mounted on , last written at Mon Jun 12 06:03:57 2017, clean flag 1, number of blocks 2097152, number of data blocks 2062703, number of cylinder groups 21, block size 16384, fragment size 2048, minimum percentage of free blocks 5, rotational delay 0ms, disk rotational speed 60rps, TIME optimization
>
> That's after
> # mkdir /mnt/a; dd if=/dev/zero of=/mnt/a/foo bs=1M count=3072
> on the Linux side, with
> root@...1:~# uname -msrv
> Linux 4.12.0-rc1+ #112 SMP Fri Jun 9 17:16:00 EDT 2017 x86_64
> there.  -o loop mount on Linux (image living on 9p), direct -hdb ../9p/ufs on OpenBSD side
> of things (both in KVM on the same host)...

Earlier today I could not reproduce the OpenBSD 6.1 ufs1 fsck error after 
Linux 4.12-rc5 copy of my >2GB file using "cp".

But later today I get the error when I copy using your "dd" method...

In any case I always get a ufs1 fsck error after the Linux rm and rmdir.

Here is the error after rm of the files created by the "dd" method:

#/usr/bin/uname -mrsv
OpenBSD 6.1 GENERIC.MP#6 amd64
#/sbin/fsck -n -f /dev/sd0e
** /dev/rsd0e (NO WRITE)
** File system is already clean
** Last Mounted on /diske
** Phase 1 - Check Blocks and Sizes
** Phase 2 - Check Pathnames
** Phase 3 - Check Connectivity
** Phase 4 - Check Reference Counts
** Phase 5 - Check Cyl groups
FREE BLK COUNT(S) WRONG IN SUPERBLK
SALVAGE? no

1 files, 1 used, 6682349 free (13 frags, 835292 blocks, 0.0% 
fragmentation)
#/sbin/fsck -f /dev/sd0e
** /dev/rsd0e
** File system is already clean
** Last Mounted on /diske
** Phase 1 - Check Blocks and Sizes
** Phase 2 - Check Pathnames
** Phase 3 - Check Connectivity
** Phase 4 - Check Reference Counts
** Phase 5 - Check Cyl groups
FREE BLK COUNT(S) WRONG IN SUPERBLK
SALVAGE? [Fyn?]
1 files, 1 used, 8255606 free (14 frags, 1031949 blocks, 0.0% 
fragmentation)

***** FILE SYSTEM WAS MODIFIED *****
#/sbin/mount /dev/sd0e
#/bin/df /diske
Filesystem  512-blocks      Used     Avail Capacity  Mounted on
/dev/sd0e     33022428         4  31371304     0%    /diske
#/sbin/mount /dev/sd0e
#/bin/df /diske
Filesystem  512-blocks      Used     Avail Capacity  Mounted on
/dev/sd0e     33022428         4  31371304     0%    /diske

OpenBSD 6.1 is not very stable for me.

I will test FreeBSD and NetBSD ufs1 to see if they have a problem...