Re: [PATCH] generic/172: raise fs size

["Darrick J. Wong" <darrick.wong@oracle.com>]

On Wed, Aug 31, 2016 at 07:50:55PM +0800, Wang Xiaoguang wrote:
> In original codes, if block size is 4096, fs size will be limited
> to 60MB. In such small fs, btrfs is not able to write 40MB data,
> because some space has been reserved internally, so the first
> _pwrite_byte in this test case will fail for enospc error.
> 
> Also from this test case's test purpose, it tries to reflink a file
> that uses more than half of the fs space, so here we can just define
> fs size to be 256MB, the file to be reflinked to be 168MB.
> 
> Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>

Looks fine to me, so
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>

--D

> ---
>  tests/generic/172 | 20 ++++++++------------
>  1 file changed, 8 insertions(+), 12 deletions(-)
> 
> diff --git a/tests/generic/172 b/tests/generic/172
> index 26fb305..8192290 100755
> --- a/tests/generic/172
> +++ b/tests/generic/172
> @@ -57,31 +57,27 @@ testdir=$SCRATCH_MNT/test-$seq
>  mkdir $testdir
>  
>  echo "Reformat with appropriate size"
> -blksz="$(stat -f $testdir -c '%S')"
> -nr_blks=10240
>  umount $SCRATCH_MNT
> -sz_bytes=$((nr_blks * 3 / 2 * blksz))
> -if [ $sz_bytes -lt $((32 * 1048576)) ]; then
> -	sz_bytes=$((32 * 1048576))
> -fi
> -_scratch_mkfs_sized $sz_bytes >> $seqres.full 2>&1
> +
> +file_size=$((168 * 1024 * 1024))
> +fs_size=$((256 * 1024 * 1024))
> +_scratch_mkfs_sized $fs_size >> $seqres.full 2>&1
>  _scratch_mount >> $seqres.full 2>&1
>  rm -rf $testdir
>  mkdir $testdir
>  
>  echo "Create a big file and reflink it"
> -_pwrite_byte 0x61 0 $((blksz * nr_blks)) $testdir/bigfile >> $seqres.full 2>&1
> +_pwrite_byte 0x61 0 $file_size $testdir/bigfile >> $seqres.full 2>&1
>  _cp_reflink $testdir/bigfile $testdir/clonefile
>  sync
>  
>  echo "Allocate the rest of the space"
> -nr_free=$(stat -f -c '%f' $testdir)
>  touch $testdir/file0 $testdir/file1
> -_pwrite_byte 0x61 0 $((blksz * nr_free)) $testdir/eat_my_space >> $seqres.full 2>&1
> +_pwrite_byte 0x61 0 $fs_size $testdir/eat_my_space >> $seqres.full 2>&1
>  sync
>  
>  echo "CoW the big file"
> -out="$(_pwrite_byte 0x62 0 $((blksz * nr_blks)) $testdir/bigfile 2>&1)"
> +out="$(_pwrite_byte 0x62 0 $file_size $testdir/bigfile 2>&1)"
>  echo ${out} | grep -q "No space left on device" || echo "CoW should have failed with ENOSPC"
>  echo ${out} >> $seqres.full 2>&1
>  echo ${out}
> @@ -89,7 +85,7 @@ echo ${out}
>  echo "Remount and try CoW again"
>  _scratch_cycle_mount
>  
> -out="$(_pwrite_byte 0x62 0 $((blksz * nr_blks)) $testdir/bigfile 2>&1)"
> +out="$(_pwrite_byte 0x62 0 $file_size $testdir/bigfile 2>&1)"
>  echo ${out} | grep -q "No space left on device" || echo "CoW should have failed with ENOSPC"
>  echo ${out} >> $seqres.full 2>&1
>  echo ${out}
> -- 
> 2.9.0
> 
> 
> 
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