On 2021/10/25 19:13, Mia wrote:

Hi Qu,

thanks for your response.
Here the output of btrfs check: 
https://gist.github.com/lynara/1c613f7ec9448600f643a59d22c1efb2

Unfortunately it's not full, and it's using an old btrfs-progs which can 
cause false alert.

Please use latest btrfs-progs v5.14.2 to re-check.

Thanks,
Qu

Thanks,
Mia

------ Originalnachricht ------
Von: "Qu Wenruo" [off-list ref]
An: "Mia" [off-list ref]; linux-btrfs@vger.kernel.org
Gesendet: 25.10.2021 12:55:46
Betreff: Re: filesystem corrupt - error -117

quoted

On 2021/10/25 18:53, Qu Wenruo wrote:

quoted

On 2021/10/25 16:46, Mia wrote:

quoted

Hello,
I need support since my root filesystem just went readonly :(

[641955.981560] BTRFS error (device sda3): tree block 342685007872 
owner
7 already locked by pid=8099, extent tree corruption detected

This line explains itself.

Your extent tree is no corrupted, thus it allocated a new tree block

I missed the "w" for the word "now"...

quoted

which is in fact already hold by other tree.

This means your metadata is no longer protected properly by COW.

"btrfs check" is highly recommended to expose the root cause.

quoted

root@rx1 ~ # btrfs fi show
Label: none  uuid: 21306973-6bf3-4877-9543-633d472dcb46
     Total devices 1 FS bytes used 189.12GiB
     devid    1 size 319.00GiB used 199.08GiB path /dev/sda3

root@rx1 ~ # btrfs fi df /
Data, single: total=194.89GiB, used=187.46GiB
System, single: total=32.00MiB, used=48.00KiB
Metadata, single: total=4.16GiB, used=1.65GiB
GlobalReserve, single: total=380.45MiB, used=0.00B

root@rx1 ~ # btrfs --version
                                                :(
btrfs-progs v4.20.1


root@rx1 ~ # uname -a
Linux rx1 4.19.0-17-amd64 #1 SMP Debian 4.19.194-3 (2021-07-18) x86_64
GNU/Linux

This is a little old for btrfs, but I don't think that's the cause.

Thanks,
Qu

quoted

Hope someone can help.
Regrads
Mia