UUIDs not shown

[iikku]

UUIDs are not shown.

└> sudo btrfs filesystem show
Label: 'label'  uuid: bd56f0a1-b50b-49a3-846b-f3f9b6fbe5a3
        Total devices 1 FS bytes used 2.53TiB
        devid    1 size 3.64TiB used 2.57TiB path /dev/sdc

versus

└> sudo ./btrfs-list -q -a 
NAME      ID PARENT TOPLVL GEN CGEN       UUID PARENTUUID  RCVD_UUID                OTIME    TYPE     EXCL  MOUNTPOINT
label    -      -      -   -    -          -          -          -                    -      fs    2.53T (single/dup, 1.10T/3.64T free, 30.27%)
    [main]  5      -      -   -    -          -          -          -                    - mainvol       -  /media/user/label

[speed47]

I can't reproduce the problem on my side with just the info you gave, I do have the UUIDs on my output with the command you're typing. Maybe this has to do with the btrfs-progs version, which one are you using? This can be seen with:

btrfs-list --version

[iikku]

btrfs-list --version prints
btrfs-list v2.2 using btrfs v6.6.3

apt show btrfs-progs prints

Package: btrfs-progs
Version: 6.6.3-1.1build2

[speed47]

I can reproduce it with btrfs-progs v6.1, which was broken for uuids, as seen by the fixing commit kdave/btrfs-progs@b7e3acd
Testing with all released versions to see if more versions are affected.

[speed47]

Tested all the released versions upstream, v6.1 seems the only one to have the problem, at least that I can reproduce.
Can you try to launch manually:

sudo btrfs sub list -us /media/user/label

If you don't see uuids there, it means that your version is somehow affected too (6.6.3-1.1build2, unsure if you compiled it yourself or if it's from a distrib)

[iikku]

So... pebkac

I didn't have any subvolumes, which is probably why subvolume uuids weren't shown. I created one and its shown:

NAME         ID PARENT TOPLVL    GEN   CGEN       UUID PARENTUUID  RCVD_UUID                OTIME    TYPE     EXCL  MOUNTPOINT
nelonen       -      -      -      -      -          -          -          -                    -      fs    2.47T (single/raid1, 1.62T/4.09T free, 39.52%)
    [main]    5      -      -      -      -          -          -          -                    - mainvol       -  /media/iikku/nelonen
    example 6114      5      5 151392 151392 0f1e..0c8a          -          -                    -  subvol       -  

However, this points out an indentation issue, the parentuuid dash (-) on the last row is one space too far right.

Also I wonder if the original the original issue is more than a misunderstanding. btrfs filesystem show /media/user/label does show the label uuid, which isn't shown on the btrfs-list subvolume uuid list. Is this intended?

[speed47]

About the indentation issue, can you try the latest (unreleased) version from the main branch? I fixed it yesterday (#19) but wanted to wait for this issue to be closed/solved before formally releasing a new version. If you can confirm that the current main branch fixes the indentation issue you have, that would be good!

About the UUID of the main filesystem, I suppose I could add it in the UUID column if present indeed, even if the column was intended for subvolumes UUID at first, I suppose it doesn't hurt (parentuuid and rcvd_uuid will obviously stay empty however)

[iikku]

I checked out the latest version and the indentation is fixed, great!