Can btrfs repair this ?

[Joe Salmeri <jmscdba@gmail.com>]

Hi,

I was running openSUSE Tumbleweed build 20231001 when I first found this 
issue but updated to TW build 20231031 the other day and it still 
reports the same issue.

Kernel 6.5.9-1 btrfsprogs 6.5.1-1.2 Device Samsung 860 EVO 500 GB 
Partion #5 root btrfs filesystem, no RAID or other drives

I run "btrfs device stats /" about once a week and no problems are reported.

I run "btrfs scrub start /"   regularly too and no problem are reported

I ran "btrfs check --readonly --force /dev/sda5" the other day and got 
the following errors:

         Opening filesystem to check...

         WARNING: filesystem mounted, continuing because of --force
         Checking filesystem on /dev/sda5
         UUID: 7591d83f-f78e-402b-afe5-fab23dad0ffe
         [1/7] checking root items
         [2/7] checking extents
         [3/7] checking free space cache
         [4/7] checking fs roots
         root 262 inode 31996735 errors 1, no inode item
                 unresolved ref dir 132030 index 769 namelen 36 name 
02179466-b671-4313-8fa5-0eb87d716f92 filetype 2 errors 5, no dir item, 
no inode ref
                 unresolved ref dir 132030 index 769 namelen 36 name 
77ef9cd4-0efe-46af-bf7f-47f582851e16 filetype 2 errors 2, no dir index
         ERROR: errors found in fs roots
         found 33034690560 bytes used, error(s) found
         total csum bytes: 28819244
         total tree bytes: 986251264
         total fs tree bytes: 876134400
         total extent tree bytes: 62521344
         btree space waste bytes: 277302161
         file data blocks allocated: 141608800256
          referenced 39054090240

Running "find -inum 31996735" identifies the item is is complaining about as

         /usr/bin/find: File system loop detected; 
‘./.snapshots/1/snapshot’ is part of the same file system loop as ‘.’.
         /usr/bin/find: 
‘./home/denise/.config/skypeforlinux/blob_storage/02179466-b671-4313-8fa5-0eb87d716f92’: 
No such file or directory

Running "ls -al /home/denise/.config/skypeforlinux/blob_storage/" also 
shows that this is correct item

     drwx------ 1 denise joe-denise   72 Nov  1 22:49 .
     drwxr-xr-x 1 denise joe-denise 3.7K Nov  1 20:07 ..
     d????????? ? ?      ?             ?            ? 
02179466-b671-4313-8fa5-0eb87d716f92

When I originally ran btrfs check there were actually a bunch of other 
items listed, however, I have timeline snapshots turned on for the 
/@home subvolume and all the other items were because of that item in 
each of the other snapshots.

I removed all the other "home" snapshots and now btrfs check only 
reports that one item as shown above.

I have heard that btrfs check --repair is generally not recommended but 
I have been unable to find a way to have btrfs remove the item it is 
complaining about.

I have tried rmdir, rm -rf, as well as find -inum 31996735 -delete and 
all report the same issue with not found.

If I understand correctly, the parent directory entry ( so 
/home/denise/.config/skypeforlinux/blob_storage/ ) has the entry for 
/home/denise/.config/skypeforlinux/blob_storage/02179466-b671-4313-8fa5-0eb87d716f92 
with inode of 31996735 but it doesn't really exist.

I do not consider this a HW issue because btrfs stats, scrub, and smart 
do not report any errors and I also track all the smart info ( health, 
reallocated sector, wear leveling, etc ) for SSDs and there are no 
errors reported and I am not having any other issues.

I suspect that this occurred the other day when Skype crashed. The item 
is not needed, I just cannot figure out how to remove it.

So, is it possible for me to remove this item and if so how do I do it ?

-- 
Regards,

Joe