linux-kernel - Re: [PATCH 1/1] fs/xfs remove obsolete simple

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Date:	Fri, 11 Jan 2013 13:16:30 +0530
From:	Abhijit Pawar <abhi.c.pawar@...il.com>
To:	Jeff Liu <jeff.liu@...cle.com>
CC:	Abhijit Pawar <abhi.c.pawar@...il.com>, Ben Myers <bpm@....com>,
	Alex Elder <elder@...nel.org>, linux-kernel@...r.kernel.org,
	xfs@....sgi.com
Subject: Re: [PATCH 1/1] fs/xfs remove obsolete simple_strto<foo>

On 01/11/2013 12:06 PM, Jeff Liu wrote:
> On 01/09/2013 10:04 PM, Abhijit Pawar wrote:
>> This patch replaces usages of obsolete simple_strtoul with kstrtoint in xfs_args and suffix_strtoul.
>>
>> Signed-off-by: Abhijit Pawar <abhi.c.pawar@...il.com>
>> ---
>>  fs/xfs/xfs_super.c |   29 +++++++++++++++++++----------
>>  1 files changed, 19 insertions(+), 10 deletions(-)
>>
>> diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
>> index ab8839b..c407121 100644
>> --- a/fs/xfs/xfs_super.c
>> +++ b/fs/xfs/xfs_super.c
>> @@ -139,9 +139,9 @@ static const match_table_t tokens = {
>>  
>>  
>>  STATIC unsigned long
>> -suffix_strtoul(char *s, char **endp, unsigned int base)
>> +suffix_kstrtoint(char *s, unsigned int base, int *res)
>>  {
>> -	int	last, shift_left_factor = 0;
>> +	int	last, shift_left_factor = 0, _res;
>>  	char	*value = s;
>>  
>>  	last = strlen(value) - 1;
>> @@ -158,7 +158,10 @@ suffix_strtoul(char *s, char **endp, unsigned int base)
>>  		value[last] = '\0';
>>  	}
>>  
>> -	return simple_strtoul((const char *)s, endp, base) << shift_left_factor;
>> +	if (kstrtoint(s, base, &_res))
>> +		return -EINVAL;
>> +	*res = _res << shift_left_factor;
>> +	return 0;
>>  }
>>  
>>  /*
>> @@ -174,7 +177,7 @@ xfs_parseargs(
>>  	char			*options)
>>  {
>>  	struct super_block	*sb = mp->m_super;
>> -	char			*this_char, *value, *eov;
>> +	char			*this_char, *value;
>>  	int			dsunit = 0;
>>  	int			dswidth = 0;
>>  	int			iosize = 0;
>> @@ -230,14 +233,16 @@ xfs_parseargs(
>>  					this_char);
>>  				return EINVAL;
>>  			}
>> -			mp->m_logbufs = simple_strtoul(value, &eov, 10);
>> +			if (kstrtoint(value, 10, &mp->m_logbufs))
>> +				return EINVAL;
>>  		} else if (!strcmp(this_char, MNTOPT_LOGBSIZE)) {
>>  			if (!value || !*value) {
>>  				xfs_warn(mp, "%s option requires an argument",
>>  					this_char);
>>  				return EINVAL;
>>  			}
>> -			mp->m_logbsize = suffix_strtoul(value, &eov, 10);
>> +			if (suffix_kstrtoint(value, 10, &mp->m_logbsize))
>> +				return EINVAL;
>>  		} else if (!strcmp(this_char, MNTOPT_LOGDEV)) {
>>  			if (!value || !*value) {
>>  				xfs_warn(mp, "%s option requires an argument",
>> @@ -266,7 +271,8 @@ xfs_parseargs(
>>  					this_char);
>>  				return EINVAL;
>>  			}
>> -			iosize = simple_strtoul(value, &eov, 10);
>> +			if (kstrtoint(value, 10, &iosize))
>> +				return EINVAL;
>>  			iosizelog = ffs(iosize) - 1;
>>  		} else if (!strcmp(this_char, MNTOPT_ALLOCSIZE)) {
>>  			if (!value || !*value) {
>> @@ -274,7 +280,8 @@ xfs_parseargs(
>>  					this_char);
>>  				return EINVAL;
>>  			}
>> -			iosize = suffix_strtoul(value, &eov, 10);
>> +			if (suffix_kstrtoint(value, 10, &iosize))
>> +				return EINVAL;
>>  			iosizelog = ffs(iosize) - 1;
>>  		} else if (!strcmp(this_char, MNTOPT_GRPID) ||
>>  			   !strcmp(this_char, MNTOPT_BSDGROUPS)) {
>> @@ -296,14 +303,16 @@ xfs_parseargs(
>>  					this_char);
>>  				return EINVAL;
>>  			}
>> -			dsunit = simple_strtoul(value, &eov, 10);
>> +			if (kstrtoint(value, 10, &dsunit))
>> +				return EINVAL;
>>  		} else if (!strcmp(this_char, MNTOPT_SWIDTH)) {
>>  			if (!value || !*value) {
>>  				xfs_warn(mp, "%s option requires an argument",
>>  					this_char);
>>  				return EINVAL;
>>  			}
>> -			dswidth = simple_strtoul(value, &eov, 10);
>> +			if (kstrtoint(value, 10, &dswidth))
>> +				return EINVAL;
>>  		} else if (!strcmp(this_char, MNTOPT_32BITINODE)) {
>>  			mp->m_flags |= XFS_MOUNT_SMALL_INUMS;
>>  		} else if (!strcmp(this_char, MNTOPT_64BITINODE)) {
>>
> checkpatch.pl show warning if we return EINVAL as below:
> WARNING: return of an errno should typically be -ve (return -EINVAL)
> 
> Can we just ignore such code style issue?
I think we can.
Ben?
> 
> Thanks,
> -Jeff
> 


-- 
-
Abhijit
--
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