[Bug 1644038] [NEW] df does not show btrfs filesystem

[Ulli Horlacher]

Public bug reported:

"df -T ." (from Ubuntu 16.04 coreutils 8.25-2ubuntu2) does not show btrfs
filesystem (subvolume):

root at diaspora:/local/home# df -T .
Filesystem     Type 1K-blocks      Used Available Use% Mounted on
-              -    926429912 398092364 527962324  43% /local/home

root at diaspora:/local# df -T .
Filesystem     Type  1K-blocks      Used Available Use% Mounted on
/dev/sda4      btrfs 926429912 398092540 527962164  43% /local

root at diaspora:/local# df -T | grep ^/dev
/dev/sda2                ext4          16382888    8614260     6913384  56% /
/dev/sda3                ext4          16382888     185016    15342628   2% /tmp
/dev/sda4                btrfs        926429912  398092360   527962328  43% /local

root at diaspora:/local# mount | grep btrfs
/dev/sda4 on /local type btrfs (rw,relatime,ssd,space_cache,subvolid=5,subvol=/)

root at diaspora:/local# blkid | grep sda4
/dev/sda4: LABEL="local" UUID="11faaa39-5805-4e92-a891-e8ceb4afa9f7" UUID_SUB="787a362f-ba60-44ca-a49f-6ff37eb691d4" TYPE="btrfs" PARTUUID="c93790e9-04"

root at diaspora:/local# btrfs filesystem show /local
Label: 'local'  uuid: 11faaa39-5805-4e92-a891-e8ceb4afa9f7
        Total devices 1 FS bytes used 379.48GiB
        devid    1 size 883.51GiB used 414.02GiB path /dev/sda4

root at diaspora:/local# btrfs subvolume list /local
ID 270 gen 42626 top level 5 path data
ID 271 gen 1046 top level 5 path tmp
ID 622 gen 43690 top level 5 path home

** Affects: coreutils (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1644038

Title:
  df does not show btrfs filesystem

Status in coreutils package in Ubuntu:
  New

Bug description:
  "df -T ." (from Ubuntu 16.04 coreutils 8.25-2ubuntu2) does not show btrfs
  filesystem (subvolume):

  root at diaspora:/local/home# df -T .
  Filesystem     Type 1K-blocks      Used Available Use% Mounted on
  -              -    926429912 398092364 527962324  43% /local/home

  root at diaspora:/local# df -T .
  Filesystem     Type  1K-blocks      Used Available Use% Mounted on
  /dev/sda4      btrfs 926429912 398092540 527962164  43% /local

  root at diaspora:/local# df -T | grep ^/dev
  /dev/sda2                ext4          16382888    8614260     6913384  56% /
  /dev/sda3                ext4          16382888     185016    15342628   2% /tmp
  /dev/sda4                btrfs        926429912  398092360   527962328  43% /local

  root at diaspora:/local# mount | grep btrfs
  /dev/sda4 on /local type btrfs (rw,relatime,ssd,space_cache,subvolid=5,subvol=/)

  root at diaspora:/local# blkid | grep sda4
  /dev/sda4: LABEL="local" UUID="11faaa39-5805-4e92-a891-e8ceb4afa9f7" UUID_SUB="787a362f-ba60-44ca-a49f-6ff37eb691d4" TYPE="btrfs" PARTUUID="c93790e9-04"

  root at diaspora:/local# btrfs filesystem show /local
  Label: 'local'  uuid: 11faaa39-5805-4e92-a891-e8ceb4afa9f7
          Total devices 1 FS bytes used 379.48GiB
          devid    1 size 883.51GiB used 414.02GiB path /dev/sda4

  root at diaspora:/local# btrfs subvolume list /local
  ID 270 gen 42626 top level 5 path data
  ID 271 gen 1046 top level 5 path tmp
  ID 622 gen 43690 top level 5 path home

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