[PATCH 0/2] f2fs: remove debufs dir if debugfs_create_file() failed

[PATCH 0/2] f2fs: remove debufs dir if debugfs_create_file() failed

[Younger Liu]

From: Younger Liu <liuyiyang@hisense.com>

When debugfs_create_file() failed in f2fs_create_root_stats(),
debugfs_root should be removed.

Signed-off-by: Younger Liu <liuyiyang@hisense.com>
Cc: Younger Liu <younger.liucn@gmail.com>
Cc: Jaegeuk Kim <jaegeuk.kim@samsung.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);
+
+bail:
+    return;
 }
 
 void f2fs_destroy_root_stats(void)
-- 
1.7.9.5



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RE: [f2fs-dev] [PATCH 0/2] f2fs: remove debufs dir if debugfs_create_file() failed

[Chao Yu]

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

> -----Original Message-----
> From: Younger Liu [mailto:younger.liucn@gmail.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@hisense.com>
> 
> When debugfs_create_file() failed in f2fs_create_root_stats(),
> debugfs_root should be removed.
> 
> Signed-off-by: Younger Liu <liuyiyang@hisense.com>
> Cc: Younger Liu <younger.liucn@gmail.com>
> Cc: Jaegeuk Kim <jaegeuk.kim@samsung.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
> 
> 
> 
> ------------------------------------------------------------------------------
> Rapidly troubleshoot problems before they affect your business. Most IT
> organizations don't have a clear picture of how application performance
> affects their revenue. With AppDynamics, you get 100% visibility into your
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> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel

Re: [PATCH 0/2] f2fs: remove debufs dir if debugfs_create_file() failed

[Younger Liu]

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@gmail.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@hisense.com>
>>
>> When debugfs_create_file() failed in f2fs_create_root_stats(),
>> debugfs_root should be removed.
>>
>> Signed-off-by: Younger Liu <liuyiyang@hisense.com>
>> Cc: Younger Liu <younger.liucn@gmail.com>
>> Cc: Jaegeuk Kim <jaegeuk.kim@samsung.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
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Rapidly troubleshoot problems before they affect your business. Most IT
>> organizations don't have a clear picture of how application performance
>> affects their revenue. With AppDynamics, you get 100% visibility into your
>> Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro!
>> http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk
>> _______________________________________________
>> Linux-f2fs-devel mailing list
>> Linux-f2fs-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
>
> ------------------------------------------------------------------------------
> Rapidly troubleshoot problems before they affect your business. Most IT 
> organizations don't have a clear picture of how application performance 
> affects their revenue. With AppDynamics, you get 100% visibility into your 
> Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro!
> http://pubads.g.doubleclick.net/gampad/clk?id=84349351&iu=/4140/ostg.clktrk
> _______________________________________________
> Linux-f2fs-devel mailing list
> Linux-f2fs-devel@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
>
>

------------------------------------------------------------------------------
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organizations don't have a clear picture of how application performance 
affects their revenue. With AppDynamics, you get 100% visibility into your 
Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro!
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