linux-kernel - Re: [f2fs-dev] [PATCH 0/2] f2fs: remove debufs dir if debugfs_create

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Date:	Tue, 03 Dec 2013 19:50:34 +0800
From:	Younger Liu <younger.liucn@...il.com>
To:	Chao Yu <chao2.yu@...sung.com>
CC:	'fs-devel' <linux-fsdevel@...r.kernel.org>,
	'kernel' <linux-kernel@...r.kernel.org>,
	'f2fs' <linux-f2fs-devel@...ts.sourceforge.net>
Subject: Re: [f2fs-dev] [PATCH 0/2] f2fs: remove debufs dir if debugfs_create_file()
 failed


On 2013/12/3 13:49, Chao Yu wrote:
> Hi Liu,
>
> You're right, we should release it instead of holding the resource
> with no use. And here are some comments as following.
>
> BTW, your patch is out of format. You'd better not let remote
> terminal or editor to instead tab with blanks in the patch.
>
> Thanks,
> Yu
  Hi Yu,
  thanks for your review. I will modify the patch
and resent in a moment.
>> -----Original Message-----
>> From: Younger Liu [mailto:younger.liucn@...il.com]
>> Sent: Monday, December 02, 2013 9:16 PM
>> To: Jaegeuk Kim
>> Cc: fs-devel; kernel; f2fs
>> Subject: [f2fs-dev] [PATCH 0/2] f2fs: remove debufs dir if debugfs_create_file() failed
>>
>> From: Younger Liu <liuyiyang@...ense.com>
>>
>> When debugfs_create_file() failed in f2fs_create_root_stats(),
>> debugfs_root should be removed.
>>
>> Signed-off-by: Younger Liu <liuyiyang@...ense.com>
>> Cc: Younger Liu <younger.liucn@...il.com>
>> Cc: Jaegeuk Kim <jaegeuk.kim@...sung.com>
>> ---
>>  fs/f2fs/debug.c |   20 +++++++++++++++++---
>>  1 file changed, 17 insertions(+), 3 deletions(-)
>>
>> diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
>> index a84b0a8..d27b689 100644
>> --- a/fs/f2fs/debug.c
>> +++ b/fs/f2fs/debug.c
>> @@ -340,10 +340,24 @@ void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
>>
>>  void __init f2fs_create_root_stats(void)
>>  {
>> +    struct dentry *file;
>> +
>>      debugfs_root = debugfs_create_dir("f2fs", NULL);
>> -    if (debugfs_root)
>> -        debugfs_create_file("status", S_IRUGO, debugfs_root,
>> -                     NULL, &stat_fops);
>> +    if (!debugfs_root)
>> +        goto bail;
>> +
>> +    file = debugfs_create_file("status", S_IRUGO,
>> +            debugfs_root, NULL, &stat_fops);
>> +    if (!file)
>> +        goto free_debugfs_dir;
>> +
>> +    return;
>> +
>> +free_debugfs_dir:
>> +    debugfs_remove(debugfs_root);
> debugfs_root = NULL;
>
>> +
>> +bail:
>> +    return;
>>  }
>>
>>  void f2fs_destroy_root_stats(void)
> You should judge debugfs_root value in f2fs_destroy_root_stats
> to decide free or not.
>
>> --
>> 1.7.9.5
>>
>>
>>
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>
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