REQ: btrfs list <subvols only> option

Hello

(Using btrfs userland 3.12)

I have my fs set up (below) I borrowed the Ubuntu scheme.

<FS_TREE>/@/
<FS_TREE>/@/etc
<FS_TREE>/@/var
..

get-default is 5 i.e. <FS_TREE>

AFAICT, perhaps I'm missing the obvious, getting the list of subvolumes only (no snapshots) is no longer trivial?

# btrfs  sub list /@
ERROR: can't access '/@'
# btrfs  sub list /@
ERROR: can't access '/@'
# btrfs  sub list /@/
ERROR: can't access '/@/'
# btrfs  sub list @/
ERROR: can't access '@/'
# btrfs  sub list @

I know I'm going to be embarrassed at the answer, but go ahead bite me!

Specify the mount point for the Btrfs file system and it will list all

Chris Murphy--

Quoted 1 line · Chris Murphy <lists <at> colorremedies.com> writes:

Specify the mount point for the Btrfs file system and it will list all

subvols on that file system.

Quoted 1 line

Quoted 1 line

Chris Murphy--

Thank you Chris.

When I do that on my version of the 3.12 userland:

# btrfs  sub list / -o
returns nothing (with no error), which I wasn't quite expecting because
there *are* other snapshots and subvols below '/'

Quoted 7 lines · Alex

Quoted 1 line · Chris Murphy <lists <at> colorremedies.com> writes:

Specify the mount point for the Btrfs file system and it will list all

subvols on that file system.

Quoted 2 lines

Chris Murphy--

Quoted 6 lines

Thank you Chris.

When I do that on my version of the 3.12 userland:

# btrfs  sub list / -o
returns nothing (with no error), which I wasn't quite expecting because
there *are* other snapshots and subvols below '/'

Not if / is a mounted subvolume that itself contains no subvolumes. / is the OS root, it is not the file system subvol=5 root.

Quoted 10 lines · Chris Murphy

Quoted 7 lines · Alex

Quoted 1 line · Chris Murphy <lists <at> colorremedies.com> writes:

Specify the mount point for the Btrfs file system and it will list all

subvols on that file system.

Quoted 2 lines

Chris Murphy--

Quoted 8 lines

Quoted 6 lines

Thank you Chris.

When I do that on my version of the 3.12 userland:

# btrfs  sub list / -o
returns nothing (with no error), which I wasn't quite expecting because
there *are* other snapshots and subvols below '/'

Not if / is a mounted subvolume that itself contains no subvolumes. / is the OS root, it is not the file system subvol=5 root.

Hmm, actually you might have found a bug.

# btrfs subvol list /
ID 272 gen 4276 top level 5 path boot
ID 273 gen 4770 top level 5 path root
ID 274 gen 4680 top level 5 path home
ID 275 gen 265 top level 5 path boot_ro_installed
ID 276 gen 280 top level 5 path root_ro_installed
ID 277 gen 280 top level 5 path home_ro_installed
ID 283 gen 327 top level 5 path boot_ro_installed+updates
ID 284 gen 329 top level 5 path root_ro_installed+updates
ID 285 gen 329 top level 5 path home_ro_installed+updates
ID 286 gen 399 top level 5 path boot_ro.3
ID 287 gen 400 top level 5 path root_ro.3
ID 288 gen 1603 top level 5 path home_ro.3
ID 473 gen 2105 top level 5 path boot_ro.2
ID 474 gen 2106 top level 5 path root_ro.2
ID 475 gen 2107 top level 5 path home_ro.2
ID 476 gen 4136 top level 5 path home/chris/Downloads/git
ID 485 gen 3144 top level 5 path boot_ro.1
ID 486 gen 3145 top level 5 path root_ro.1
ID 487 gen 3146 top level 5 path home_ro.1
ID 488 gen 3880 top level 5 path home/chris/Downloads/git/kernel

# btrfs subvol list / -o
# btrfs subvol list /home -o
# btrfs subvol list /home/chris/Downloads/ -o
# btrfs subvol list /home/chris/Downloads/git -o

It seems for sure that the last three should have reported ID 476 and 488. And probably the first should also have listed 272 and 274.

273 is mounted at /
272 is mounted at /boot
274 is mounted at /home

man btrfs " -o print only subvolumes bellow specified <path>."

Small typo while we're at it, below should have one l.

Quoted 3 lines

Hmm, actually you might have found a bug.

Small typo while we're at it, below should have one l.

kernel-3.13.0-0.rc6.git0.1.fc21.x86_64
btrfs-progs-3.12-1.fc20.x86_64

Chris Murphy

Quoted 1 line · Chris Murphy <lists <at> colorremedies.com> writes:

Specify the mount point for the Btrfs file system and it will list all

subvols on that file system.

Quoted 1 line

Chris Murphy--

Thank you Chris.

When I do that on my version of the 3.12 userland:

# btrfs  sub list / -o

returns nothing (with no error), which I wasn't quite expecting because there *are* other snapshots and subvols below '/'

AND

# btrfs  sub list / -s
correctly lists the snapshots only.

I don't understand, what or if, I'm doing something wrong. Thank you in advance.

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