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Re: one remaining mystery about the FreeBSD domU failure on NetBSD XEN3_DOM0



At Sun, 11 Apr 2021 21:13:44 +0000 (UTC), RVP <rvp%SDF.ORG@localhost> wrote:
Subject: Re: one remaining mystery about the FreeBSD domU failure on NetBSD XEN3_DOM0
>
> I've run into this before. This is a NetBSD vs. FreeBSD UFS issue. Create
> a UFS v1 FS on FreeBSD if you want to write it on NetBSD:
>
> 	newfs -O1 /dev/...
>
> Otherwise, you get that "Invalid quota magic number" error because newfs
> creates a UFSv2 FS on FreeBSD.

While that wasn't exactly my goal (I just wanted to see from the NetBSD
side if the FreeBSD side was actually writing sensible things and not
missing anything or mixing anything up or corrupting anything), it could
indeed help me in doing that.

Anyway this does something slightly different (and better, or worse) on
the FreeBSD side, but still ends up with a corrupted filesystem, as seen
from both sides, though maybe not so bad from NetBSD's point of view:

xbd1: 30720MB <Virtual Block Device> at device/vbd/2064 on xenbusb_front0
xbd1: attaching as da1
xbd1: features: flush
xbd1: synchronize cache commands enabled.
GEOM: new disk da1

# newfs -O1 /dev/da1
/dev/da1: 30720.0MB (62914560 sectors) block size 32768, fragment size 4096
        using 121 cylinder groups of 254.00MB, 8128 blks, 32512 inodes.
super-block backups (for fsck_ffs -b #) at:
 64, 520256, 1040448, 1560640, 2080832, 2601024, 3121216, 3641408, 4161600, 4681792, 5201984, 5722176, 6242368, 6762560, 7282752,
 7802944, 8323136, 8843328, 9363520, 9883712, 10403904, 10924096, 11444288, 11964480, 12484672, 13004864, 13525056, 14045248,
 14565440, 15085632, 15605824, 16126016, 16646208, 17166400, 17686592, 18206784, 18726976, 19247168, 19767360, 20287552, 20807744,
 21327936, 21848128, 22368320, 22888512, 23408704, 23928896, 24449088, 24969280, 25489472, 26009664, 26529856, 27050048, 27570240,
 28090432, 28610624, 29130816, 29651008, 30171200, 30691392, 31211584, 31731776, 32251968, 32772160, 33292352, 33812544, 34332736,
 34852928, 35373120, 35893312, 36413504, 36933696, 37453888, 37974080, 38494272, 39014464, 39534656, 40054848, 40575040, 41095232,
 41615424, 42135616, 42655808, 43176000, 43696192, 44216384, 44736576, 45256768, 45776960, 46297152, 46817344, 47337536, 47857728,
 48377920, 48898112, 49418304, 49938496, 50458688, 50978880, 51499072, 52019264, 52539456, 53059648, 53579840, 54100032, 54620224,
 55140416, 55660608, 56180800, 56700992, 57221184, 57741376, 58261568, 58781760, 59301952, 59822144, 60342336, 60862528, 61382720,
 61902912, 62423104
# mount /dev/da1
mount: /dev/da1: unknown special file or file system
# mount /dev/da1 /mnt
# df
Filesystem               512-blocks   Used    Avail Capacity  Mounted on
/dev/ufs/FreeBSD_Install     782968 737016   -16680   102%    /
devfs                             2      2        0   100%    /dev
tmpfs                         65536    616    64920     1%    /var
tmpfs                         40960      8    40952     0%    /tmp
/dev/da1                   61915512     16 56962256     0%    /mnt
# ls -l /mnt
total 8
drwxrwxr-x  2 root  operator  512 Apr 11 21:45 .snap
# cp /COPYRIGHT  /mnt/
# ls -l /mnt/
total 24
drwxrwxr-x  2 root  operator   512 Apr 11 21:45 .snap
-r--r--r--  1 root  wheel     6177 Apr 11 21:46 COPYRIGHT
# pax -X -rw -pe / /mnt
# ls -l /mnt
total 1120
-rw-r--r--   2 root  wheel       1089 Oct 23 05:56 .cshrc
-rw-r--r--   2 root  wheel        470 Oct 23 05:56 .profile
drwxrwxr-x   2 root  operator     512 Apr 11 21:52 .snap
-r--r--r--   1 root  wheel       6177 Oct 23 05:56 COPYRIGHT
-r--r--r--   1 root  wheel       7226 Oct 23 05:57 ERRATA.HTML
-r--r--r--   1 root  wheel       3273 Oct 23 05:57 ERRATA.TXT
-r--r--r--   1 root  wheel     252351 Oct 23 05:57 HARDWARE.HTML
-r--r--r--   1 root  wheel     117568 Oct 23 05:57 HARDWARE.TXT
-r--r--r--   1 root  wheel      23882 Oct 23 05:57 README.HTML
-r--r--r--   1 root  wheel      14316 Oct 23 05:57 README.TXT
-r--r--r--   1 root  wheel      36431 Oct 23 05:57 RELNOTES.HTML
-r--r--r--   1 root  wheel      12343 Oct 23 05:57 RELNOTES.TXT
drwxr-xr-x   2 root  wheel       1024 Oct 23 05:55 bin
drwxr-xr-x   9 root  wheel       1536 Oct 23 05:57 boot
dr-xr-xr-x   2 root  wheel        512 Apr 11 19:02 dev
-r--r--r--   1 root  wheel       6985 Oct 23 05:57 docbook.css
drwxr-xr-x  25 root  wheel       2048 Oct 23 06:04 etc
drwxr-xr-x   5 root  wheel       1536 Oct 23 05:55 lib
drwxr-xr-x   3 root  wheel        512 Oct 23 05:55 libexec
drwxr-xr-x   2 root  wheel        512 Oct 23 05:55 media
drwxr-xr-x   2 root  wheel        512 Oct 23 05:57 mnt
drwxr-xr-x   2 root  wheel        512 Oct 23 05:55 net
dr-xr-xr-x   2 root  wheel        512 Oct 23 05:55 proc
drwxr-xr-x   2 root  wheel        512 Oct 23 05:55 rescue
drwxr-xr-x   2 root  wheel        512 Oct 23 05:56 root
drwxr-xr-x   2 root  wheel       2560 Oct 23 05:56 sbin
drwxrwxrwt   2 root  wheel        512 Apr 11 21:52 tmp
drwxr-xr-x  13 root  wheel        512 Oct 23 05:57 usr
drwxr-xr-x   2 root  wheel        512 Apr 11 19:04 var
# umount /mnt
# fsck /dev/da1
** /dev/da1
** Last Mounted on /mnt
** Phase 1 - Check Blocks and Sizes
PARTIALLY TRUNCATED INODE I=325128
SALVAGE? [yn] n

PARTIALLY TRUNCATED INODE I=877864
SALVAGE? [yn] n

PARTIALLY TRUNCATED INODE I=877866
SALVAGE? [yn] n

PARTIALLY TRUNCATED INODE I=877879
SALVAGE? [yn] ^C

***** FILE SYSTEM MARKED DIRTY *****


Back on the NetBSD side:


<NetBSD> # xl block-detach fbsd-test  2064
<NetBSD> # fsck /dev/mapper/rscratch-fbsd--test.0
** /dev/mapper/rscratch-fbsd--test.0
** Last Mounted on /mnt
** 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? [yn] n

SUMMARY INFORMATION BAD
SALVAGE? [yn] n

BLK(S) MISSING IN BIT MAPS
SALVAGE? [yn] n

12076 files, 91642 used, 7647797 free (293 frags, 955938 blocks, 0.0% fragmentation)

***** UNRESOLVED INCONSISTENCIES REMAIN *****



--
					Greg A. Woods <gwoods%acm.org@localhost>

Kelowna, BC     +1 250 762-7675           RoboHack <woods%robohack.ca@localhost>
Planix, Inc. <woods%planix.com@localhost>     Avoncote Farms <woods%avoncote.ca@localhost>

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