Re: port-xen/56782: panic: /: bad dir ino null entry

[Bartosz Maciejewski <bartosz%maciejewski.org@localhost>]

Sure. I mounted it as asecond drive into other machine, as /mnt, so here 
is the output:

# fsdb -f /dev/rxbd1a
** /dev/rxbd1a
Editing file system `/dev/rxbd1a'
Last Mounted on /mnt
current inode: directory
I=2 MODE=40755 SIZE=1536
MTIME=Mar 31 19:46:00 2022 [655437624 nsec]
CTIME=Mar 31 19:46:00 2022 [655437624 nsec]
ATIME=Apr  6 11:52:52 2022 [143855887 nsec]
OWNER=root GRP=wheel LINKCNT=27 FLAGS=0x0 BLKCNT=0x4 GEN=0x0
fsdb (inum: 2)> cd /mnt/var/cache/fontconfig
component `mnt': current inode: directory
I=10 MODE=40755 SIZE=512
MTIME=Apr  6 07:07:37 2022 [57705651 nsec]
CTIME=Apr  6 07:07:37 2022 [57707421 nsec]
ATIME=Apr  6 07:07:37 2022 [23515205 nsec]
OWNER=root GRP=wheel LINKCNT=2 FLAGS=0x0 BLKCNT=0x2 GEN=0x0
component `var': fsdb: name `var' not found in current inode directory
fsdb: rval was 1
fsdb (inum: 10)> ls
slot 0 ino 10 reclen 12: directory, `.'
slot 1 ino 2 reclen 500: directory, `..'
fsdb (inum: 10)> > quit
*** FILE SYSTEM MARKED DIRTY
*** BE SURE TO RUN FSCK TO CLEAN UP ANY DAMAGE
*** IF IT WAS MOUNTED, RE-MOUNT WITH -u -o reload


And for the Partition info here is fdsik and disklabel. Hope this helps.


# fdisk /dev/xbd1
fdisk: primary partition table invalid, no magic in sector 0
fdisk: Cannot determine the number of heads
Disk: /dev/xbd1d
NetBSD disklabel disk geometry:
cylinders: 2048000, heads: 1, sectors/track: 2048 (2048 sectors/cylinder)
total sectors: 4194304000, bytes/sector: 512

BIOS disk geometry:
cylinders: 1023, heads: 255, sectors/track: 63 (16065 sectors/cylinder)
total sectors: 4194304000

Partitions aligned to 2048 sector boundaries, offset 2048

Partition table:
0: <UNUSED>
1: <UNUSED>
2: <UNUSED>
3: <UNUSED>
Bootselector disabled.

No active partition.
Drive serial number: 0 (0x00000000)

# disklabel xbd1
# /dev/rxbd1d:
type: unknown
disk: XenServer
label:
flags:
bytes/sector: 512
sectors/track: 63
tracks/cylinder: 16
sectors/cylinder: 1008
cylinders: 20805
total sectors: 4194304000
rpm: 3600
interleave: 1
trackskew: 0
cylinderskew: 0
headswitch: 0# microseconds
track-to-track seek: 0# microseconds
drivedata: 0

16 partitions:
#        size    offset     fstype [fsize bsize cpg/sgs]
 a: 4192206848         0     4.2BSD   2048 16384     0  # (Cyl.      0 
- 4158935*)
 b:   2097152 4192206848       swap                     # (Cyl. 
4158935*- 4161015*)
 c: 4194304000         0     unused      0     0        # (Cyl.      0 
- 4161015*)
 d: 4194304000         0     unused      0     0        # (Cyl.      0 
- 4161015*)


W dniu 06.04.2022 o 14:00, Martin Husemann pisze:
> The following reply was made to PR port-xen/56782; it has been noted by GNATS.
>
> From: Martin Husemann <martin%duskware.de@localhost>
> To: gnats-bugs%netbsd.org@localhost
> Cc:
> Subject: Re: port-xen/56782: panic: /: bad dir ino null entry
> Date: Wed, 6 Apr 2022 13:58:50 +0200
>
>   On Wed, Apr 06, 2022 at 11:45:00AM +0000, bartosz%maciejewski.org@localhost wrote:
>   
>   > FSCKing with -f does not fix problem. Same problem is when accessing
>   > /var/cache/fontconfig dir.
>   
>   That sounds like a bug in fsck(8) that should be fixed!
>   
>   Can you acces the filesystem from some other machine? Alternatively
>   boot to single user and then use fsdb on the root device.
>   
>   Something like:
>   
>    # fsdb -f /dev/rdk0
>    fsdb (inum: 2) > cd /var/cache/fontconfig
>    fsdb (inum: 6465329)> ls
>   
>   and show us the output. Also please show the partition info of the device.
>   
>   Martin
>