Libguestfs - May 2015 - libguestfs error: mkfs_btrfs

Hi all :

there is a problem on libguestfs-1.29.40 after  command :make check


libguestfs: error: mkfs_btrfs: /dev/vda1: device /dev/vda1 is too small
(must be at least 256 MB)
FAIL: test_btrfs_image_0
  3/515 test_btrfstune_enable_skinny_metadata_extent_refs_0
libguestfs: error: btrfstune_enable_skinny_metadata_extent_refs: /dev/vda1:
btrfstune: invalid option -- 'x'
usage: btrfstune [options] device
    -S value    enable/disable seeding
FAIL: test_btrfstune_enable_skinny_metadata_extent_refs_0
  4/515 test_btrfstune_enable_extended_inode_refs_0
libguestfs: error: btrfstune_enable_extended_inode_refs: /dev/vda1:
btrfstune: invalid option -- 'r'
usage: btrfstune [options] device
    -S value    enable/disable seeding
FAIL: test_btrfstune_enable_extended_inode_refs_0
  5/515 test_btrfstune_seeding_0
libguestfs: error: btrfstune_seeding: /dev/vda1: btrfstune: invalid option
-- 'f'

I found two patch
https://www.redhat.com/archives/libguestfs/2012-May/msg00018.htmlvirt-make-fs
   Fix estimation when making btrfs (but there is no virt-make-fs under
tools)
https://www.redhat.com/archives/libguestfs/2012-April/msg00008.html    New
API: mkfs-btrfs for creating btrfs filesystems ( It was patched in
libguestfs-1.29.40)

It seems stupid, but I can't find the answer, I am sorry

Hi,

That’s a check of  btrfs filesystem.

see the commit of btrfs-progs:
http://git.kernel.org/cgit/linux/kernel/git/kdave/btrfs-progs.git/commit/?id=18e2663db3e18d4506b6fe583ad93fc83235fca9

btrfs-progs: Add minimum device size check

Btrfs has global block reservation, so even mkfs.btrfs can execute
without problem, there is still a possibility that the filesystem can't
be mounted.
For example when mkfs.btrfs on a 8M file on x86_64 platform, kernel will
refuse to mount due to ENOSPC, since system block group takes 4M and
mixed block group takes 4M, and global block reservation will takes all
the 4M from mixed block group, which makes btrfs unable to create uuid
tree.

This patch will add minimum device size check before actually mkfs.
The minimum size calculation uses a simplified one:
minimum_size_for_each_dev = 2 * (system block group + global block rsv)
and global block rsv = leafsize << 10



From: libguestfs-bounces@redhat.com [mailto:libguestfs-bounces@redhat.com] On
Behalf Of fu lirong
Sent: Tuesday, May 19, 2015 10:01 AM
To: libguestfs@redhat.com
Subject: [Libguestfs] libguestfs error: mkfs_btrfs

Hi all :

there is a problem on libguestfs-1.29.40 after  command :make check


libguestfs: error: mkfs_btrfs: /dev/vda1: device /dev/vda1 is too small (must be
at least 256 MB)
FAIL: test_btrfs_image_0
  3/515 test_btrfstune_enable_skinny_metadata_extent_refs_0
libguestfs: error: btrfstune_enable_skinny_metadata_extent_refs: /dev/vda1:
btrfstune: invalid option -- 'x'
usage: btrfstune [options] device
    -S value    enable/disable seeding
FAIL: test_btrfstune_enable_skinny_metadata_extent_refs_0
  4/515 test_btrfstune_enable_extended_inode_refs_0
libguestfs: error: btrfstune_enable_extended_inode_refs: /dev/vda1: btrfstune:
invalid option -- 'r'
usage: btrfstune [options] device
    -S value    enable/disable seeding
FAIL: test_btrfstune_enable_extended_inode_refs_0
  5/515 test_btrfstune_seeding_0
libguestfs: error: btrfstune_seeding: /dev/vda1: btrfstune: invalid option --
'f'
I found two patch
https://www.redhat.com/archives/libguestfs/2012-May/msg00018.htmlvirt-make-fs   
Fix estimation when making btrfs (but there is no virt-make-fs under tools)
https://www.redhat.com/archives/libguestfs/2012-April/msg00008.html    New API:
mkfs-btrfs for creating btrfs filesystems ( It was patched in 
libguestfs-1.29.40)
It seems stupid, but I can't find the answer, I am sorry

On Tue, May 19, 2015 at 10:00:34AM +0800, fu lirong
wrote:
> libguestfs: error: btrfstune_enable_skinny_metadata_extent_refs: /dev/vda1:
> btrfstune: invalid option -- 'x'
> usage: btrfstune [options] device
>     -S value    enable/disable seeding
> FAIL: test_btrfstune_enable_skinny_metadata_extent_refs_0
>   4/515 test_btrfstune_enable_extended_inode_refs_0
> libguestfs: error: btrfstune_enable_extended_inode_refs: /dev/vda1:
> btrfstune: invalid option -- 'r'
> usage: btrfstune [options] device
>     -S value    enable/disable seeding
> FAIL: test_btrfstune_enable_extended_inode_refs_0
>   5/515 test_btrfstune_seeding_0
> libguestfs: error: btrfstune_seeding: /dev/vda1: btrfstune: invalid option
> -- 'f'
I think these are caused because your version of btrfstune is too old.

If you want to skip individual tests, you can define skip variables, eg:

export SKIP_TEST_BTRFSTUNE_ENABLE_SKINNY_METADATA_EXTENT_REFS_0=1
export SKIP_TEST_BTRFSTUNE_ENABLE_EXTENDED_INODE_REFS_0=1
export SKIP_TEST_BTRFSTUNE_SEEDING_0=1
make check

To see what SKIP_* variables are available, you have to examine the
test programs.  In this case, look at `tests/c-api/tests.c'.

We have a fairly large collection of SKIP_* variables defined when
building on Fedora:

http://pkgs.fedoraproject.org/cgit/libguestfs.git/tree/libguestfs.spec#n879

Rich.

-- 
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