[PATCH] xfstests: 259: convert to use the _math() function

[PATCH] xfstests: 259: convert to use the _math() function

[Alex Elder]

Make test 259 a bit more readable by using the new _math() function.

Signed-off-by: Alex Elder <aelder@sgi.com>

---
 259     |   17 ++++++-----------
 259.out |   12 ++++++------
 2 files changed, 12 insertions(+), 17 deletions(-)

Index: b/259
===================================================================
--- a/259
+++ b/259
@@ -43,20 +43,15 @@ trap "_cleanup ; exit \$status" 0 1 2 3 
 _supported_fs xfs
 _supported_os Linux
 
+_require_math
+
 testfile=$TEST_DIR/259.image
 
 # Test various sizes slightly less than 4 TB
-# 4398046511103 = 2^42 - 1
-# 4398046510592 = 2^42 - 512
-# 4398046510080 = 2^42 - 1024
-# 4398046510079 = 2^42 - 1025
-# 4398046509056 = 2^42 - 2048
-# 4398046507008 = 2^42 - 4096
-
-for ddseek in 4398046511103 4398046510592 4398046510080 \
-	4398046510079 4398046509056 4398046507008;
-do
-	echo "Trying to make $ddseek B long xfs fs image"
+four_TB=$(_math "2^42")
+for del in 1 512 1024 1025 2048 4096; do
+	ddseek=$(_math "$four_TB - $del")
+	echo "Trying to make (2 TB - $del) B long xfs fs image"
 	rm -f "$testfile"
 	dd if=/dev/zero "of=$testfile" bs=1 count=0 seek=$ddseek \
 					>/dev/null 2>&1 || echo "dd failed"
Index: b/259.out
===================================================================
--- a/259.out
+++ b/259.out
@@ -1,7 +1,7 @@
 QA output created by 259
-Trying to make 4398046511103 B long xfs fs image
-Trying to make 4398046510592 B long xfs fs image
-Trying to make 4398046510080 B long xfs fs image
-Trying to make 4398046510079 B long xfs fs image
-Trying to make 4398046509056 B long xfs fs image
-Trying to make 4398046507008 B long xfs fs image
+Trying to make (2 TB - 1) B long xfs fs image
+Trying to make (2 TB - 512) B long xfs fs image
+Trying to make (2 TB - 1024) B long xfs fs image
+Trying to make (2 TB - 1025) B long xfs fs image
+Trying to make (2 TB - 2048) B long xfs fs image
+Trying to make (2 TB - 4096) B long xfs fs image

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Re: [PATCH] xfstests: 259: convert to use the _math() function

[Alex Elder]

On Mon, 2011-09-26 at 16:59 -0500, Alex Elder wrote:
> Make test 259 a bit more readable by using the new _math() function.
> 
> Signed-off-by: Alex Elder <aelder@sgi.com>

Whoops, substitute "4 TB" for "2 TB" everwhere appropriate...	-Alex

> ---
>  259     |   17 ++++++-----------
>  259.out |   12 ++++++------
>  2 files changed, 12 insertions(+), 17 deletions(-)
> 
> Index: b/259
> ===================================================================
> --- a/259
> +++ b/259
> @@ -43,20 +43,15 @@ trap "_cleanup ; exit \$status" 0 1 2 3 
>  _supported_fs xfs
>  _supported_os Linux
>  
> +_require_math
> +
>  testfile=$TEST_DIR/259.image
>  
>  # Test various sizes slightly less than 4 TB
> -# 4398046511103 = 2^42 - 1
> -# 4398046510592 = 2^42 - 512
> -# 4398046510080 = 2^42 - 1024
> -# 4398046510079 = 2^42 - 1025
> -# 4398046509056 = 2^42 - 2048
> -# 4398046507008 = 2^42 - 4096
> -
> -for ddseek in 4398046511103 4398046510592 4398046510080 \
> -	4398046510079 4398046509056 4398046507008;
> -do
> -	echo "Trying to make $ddseek B long xfs fs image"
> +four_TB=$(_math "2^42")
> +for del in 1 512 1024 1025 2048 4096; do
> +	ddseek=$(_math "$four_TB - $del")
> +	echo "Trying to make (2 TB - $del) B long xfs fs image"
>  	rm -f "$testfile"
>  	dd if=/dev/zero "of=$testfile" bs=1 count=0 seek=$ddseek \
>  					>/dev/null 2>&1 || echo "dd failed"
> Index: b/259.out
> ===================================================================
> --- a/259.out
> +++ b/259.out
> @@ -1,7 +1,7 @@
>  QA output created by 259
> -Trying to make 4398046511103 B long xfs fs image
> -Trying to make 4398046510592 B long xfs fs image
> -Trying to make 4398046510080 B long xfs fs image
> -Trying to make 4398046510079 B long xfs fs image
> -Trying to make 4398046509056 B long xfs fs image
> -Trying to make 4398046507008 B long xfs fs image
> +Trying to make (2 TB - 1) B long xfs fs image
> +Trying to make (2 TB - 512) B long xfs fs image
> +Trying to make (2 TB - 1024) B long xfs fs image
> +Trying to make (2 TB - 1025) B long xfs fs image
> +Trying to make (2 TB - 2048) B long xfs fs image
> +Trying to make (2 TB - 4096) B long xfs fs image



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