Re: [PATCH 2/2] btrfs: tree-checker: check item_size for dev_item

[Wang Yugui <wangyugui@e16-tech.com>]

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Hi,

> >>>> A btrfs filesystem failed to boot with this patch.
> >>>>
> >>>> corrupt leaf: root=3 block=1081344 slot=0 devid=1 invalid item
> >>>> size: has 0 expect 98
> >>>>
> >>>> Any way to fix it online?
> >>>
> >>> This btrfs filesystem is created by centos 7.9 installer (btrfs
> >>> 4.9?)
> >>> about 1 years ago.  and then mainly writen by kernel
> >>> 5.4/5.10/5.15.
> >>>
> >> Yes, btrfs-progs v4.9 and v3.10 based kernel.
> >> I created a btrfs and it looks fine.
> >> Could please provide output of
> >> btrfs inspect-internal dump-tree $device -t 3
> >> ?
> >> You can trim it if the content is too long only leaf 1081344 is needed.
> >
> > Hi,
> >
> > # btrfs filesystem show /
> > Label: 'OS_T640'  uuid: 73dcce98-8f6b-4ec8-bfac-fa7c7c87409d
> >          Total devices 10 FS bytes used 5.53TiB
> >          devid    1 size 799.00GiB used 332.01GiB path /dev/sda2
> >          devid    2 size 1.75TiB used 741.00GiB path /dev/sdg1
> >          devid    3 size 1.75TiB used 745.00GiB path /dev/sdj1
> >          devid    4 size 1.75TiB used 740.00GiB path /dev/sdi1
> >          devid    5 size 1.75TiB used 745.00GiB path /dev/sdd1
> >          devid    6 size 1.75TiB used 480.00GiB path /dev/sde1
> >          devid    7 size 1.75TiB used 480.00GiB path /dev/sdh1
> >          devid    8 size 1.75TiB used 479.00GiB path /dev/sdc1
> >          devid    9 size 1.75TiB used 480.00GiB path /dev/sdb1
> >          devid   10 size 1.75TiB used 479.00GiB path /dev/sdf1
> >
> > #btrfs inspect-internal dump-tree /dev/sda2 -t 3 > 3.txt
> >
> > and then 3.txt is zipped as  this attachment file(3.zip)
> 
> Full dmesg of the boot failure please.
> 
> The dump-tree shows the device item is completely sane, it has size 98,
> not the value (0) reported from tree-checker.
> 
> Thus I don't know why tree-checker is reporting this problem.
> 

This (attachment file boot.dmesg.txt.zip ) is the full dmesg output

Best Regards
Wang Yugui (wangyugui@e16-tech.com)
2022/02/05

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