# Error description Trying to delete subvolume which is set as default, not allowed. States reason to dmesg but not to terminal. # Request: Output to terminal as well, the reason why can't delete subvolume. In example: because subvolume is set as default on deletion intent. As user I didn't knew I had to follow dmesg, read it just out of luck. # Environment uname -a Linux damian 5.4.0-33-generic #37-Ubuntu SMP Thu May 21 12:53:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux btrfs --version btrfs-progs v5.4.1 sudo btrfs fi show Label: none uuid: c41a0bb3-2e82-314c-456a-cffda8400b36 Total devices 1 FS bytes used 11.95GiB devid 1 size 180.00GiB used 16.07GiB path /dev/nbd3p1 btrfs fi df /drive/ Data, single: total=14.01GiB, used=11.23GiB System, DUP: total=32.00MiB, used=16.00KiB Metadata, DUP: total=1.00GiB, used=89.67MiB GlobalReserve, single: total=12.84MiB, used=0.00B dmesg | grep BTRFS [ 221.769923] BTRFS: device fsid c41a0bb3-2e82-314c-456a-cffda8400b36 devid 1 transid 1039 /dev/nbd3p1 [ 253.000241] BTRFS info (device nbd3p1): disk space caching is enabled [ 253.000244] BTRFS info (device nbd3p1): has skinny extents [ 253.093369] BTRFS info (device nbd3p1): enabling ssd optimizations [ 1359.791080] BTRFS info (device nbd3p1): disk space caching is enabled [ 1359.791081] BTRFS info (device nbd3p1): has skinny extents [ 1359.870093] BTRFS info (device nbd3p1): enabling ssd optimizations # Current behavior -> error replication: sudo mount -t btrfs -o subvolid=5 /dev/nbd3p1 /drive/ sudo btrfs subvolume create /drive/newvol Create subvolume '/drive/newvol' sudo btrfs subvolume list /drive ID 464 gen 1190 top level 5 path newvol sudo btrfs subvolume set-default 464 /drive/ sudo btrfs subvolume get-default /drive/ ID 464 gen 1190 top level 5 path newvol # On deletion intent sudo btrfs subvolume delete /drive/newvol/ Delete subvolume (no-commit): '/drive/newvol' ERROR: Could not destroy subvolume/snapshot: Operation not permitted dmesg | grep BTRFS [ 5160.908633] BTRFS error (device nbd3p1): deleting default subvolume 464 is not allowed # Effective deletion sudo btrfs subvolume set-default 5 /drive/ sudo btrfs subvolume delete /drive/newvol/ Delete subvolume (no-commit): '/drive/newvol' # Bugzilla https://bugzilla.kernel.org/show_bug.cgi?id=207975
