On Mon, Dec 05, 2016 at 05:01:28PM -0800, Omar Sandoval wrote:
> From: Omar Sandoval <[email protected]>
> 
> Btrfs doesn't support swapfiles (yet?), so generic/356 fails
> erroneously, and generic/357 only passes by accident. Let's add a
> _require_scratch_swapfile helper and add it to these tests.

Hehe, good catch. :)
Reviewed-by: Darrick J. Wong <[email protected]>

--D

> 
> Signed-off-by: Omar Sandoval <[email protected]>
> ---
> I have some code enabling swapfiles for Btrfs [1], but there's some ABBA
> deadlock issues with i_rwsem and mmap_sem on swap-over-NFS that I
> haven't had time to sort out. In the meantime, let's just skip these
> tests.
> 
> 1: https://github.com/osandov/linux/tree/btrfs-swap
> 
>  common/rc         | 22 ++++++++++++++++++++++
>  tests/generic/356 |  1 +
>  tests/generic/357 |  1 +
>  3 files changed, 24 insertions(+)
> 
> diff --git a/common/rc b/common/rc
> index 2719b23..d863e56 100644
> --- a/common/rc
> +++ b/common/rc
> @@ -1790,6 +1790,28 @@ _require_odirect()
>       rm -f $testfile 2>&1 > /dev/null
>  }
>  
> +# Check that the filesystem supports swapfiles
> +_require_scratch_swapfile()
> +{
> +     _require_scratch
> +
> +     _scratch_mkfs >/dev/null
> +     _scratch_mount
> +
> +     # Minimum size for mkswap is 10 pages
> +     local size=$(($(get_page_size) * 10))
> +
> +     _pwrite_byte 0x61 0 "$size" "$SCRATCH_MNT/swap" >/dev/null 2>&1
> +     mkswap "$SCRATCH_MNT/swap" >/dev/null 2>&1
> +     if ! swapon "$SCRATCH_MNT/swap" >/dev/null 2>&1; then
> +             _scratch_unmount
> +             _notrun "swapfiles are not supported"
> +     fi
> +
> +     swapoff "$SCRATCH_MNT/swap" >/dev/null 2>&1
> +     _scratch_unmount
> +}
> +
>  # Check that a fs has enough free space (in 1024b blocks)
>  #
>  _require_fs_space()
> diff --git a/tests/generic/356 b/tests/generic/356
> index 6bb90c0..51eeb65 100755
> --- a/tests/generic/356
> +++ b/tests/generic/356
> @@ -44,6 +44,7 @@ _cleanup()
>  
>  # real QA test starts here
>  _supported_os Linux
> +_require_scratch_swapfile
>  _require_scratch_reflink
>  _require_cp_reflink
>  
> diff --git a/tests/generic/357 b/tests/generic/357
> index 439b314..0dd0c10 100755
> --- a/tests/generic/357
> +++ b/tests/generic/357
> @@ -44,6 +44,7 @@ _cleanup()
>  
>  # real QA test starts here
>  _supported_os Linux
> +_require_scratch_swapfile
>  _require_scratch_reflink
>  _require_cp_reflink
>  
> -- 
> 2.10.2
> 
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