linux-ext4 - Re: fix the ext4_read_inline

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Date:	Wed, 18 Sep 2013 01:30:36 +0800
From:	Boxi Liu <boxi10liu@...il.com>
To:	Jan Kara <jack@...e.cz>
Cc:	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>,
	Theodore Tso <tytso@....edu>, Robin Dong <sanbai@...bao.com>,
	"tm@....ma" <tm@....ma>, "lewis.liulei" <lewis.liulei@...wei.com>,
	pamirs <pamirs@....com>
Subject: Re: fix the ext4_read_inline_dir return value

Thanks to point the that,I will fix it.

ext4: fix the ext4_read_inline_dir return value

In ext4_read_inlne_dir,the return value is the return
of ext4_read_inline_data len.But in no inline_data case,
the return value is 0,it's inconsistent.So fix the return
value of ext4_read_inline_dir.

Signed-off-by: BoxiLiu <lewis.liulei@...wei.com>
---
 fs/ext4/inline.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index d9ecbf1..c3efb65 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1442,6 +1442,7 @@ int ext4_read_inline_dir(struct file *file,
  if (ret < 0)
  goto out;

+ ret = 0;
  sb = inode->i_sb;
  parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode);
  offset = ctx->pos;
-- 

2013/9/18 Jan Kara <jack@...e.cz>:
> On Tue 17-09-13 23:08:51, Boxi Liu wrote:
>> hi，
>> there may be a bug in ext4_read_inline_dir() function with inline_data feature.
>> when I recursion call a sys_old_readdir to read a direntry's
>> sub_dentry,I find that the ext4_read_inline_dir return the len of the
>> inline_data ,but in the no inline_data case,it will return 0.It is
>> inconsistent.
>> So I try to make a patch to fix it.
>   The patch is fine, thanks for finding the bug. But please read
> Documentation/SubmittingPatches about how your patch should be formatted.
> In particular your patch has damaged whitespace (tabs converted to spaces).
> Gmail does this - you have to send the patch as an attachment to avoid this
> when using gmail.  Also your patch misses Signed-off-by line.
>
>                                                                 Honza
>>
>> diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
>> index d9ecbf1..3ea39cd 100644
>> --- a/fs/ext4/inline.c
>> +++ b/fs/ext4/inline.c
>> @@ -1441,7 +1441,7 @@ int ext4_read_inline_dir(struct file *file,
>>   up_read(&EXT4_I(inode)->xattr_sem);
>>   if (ret < 0)
>>   goto out;
>> -
>> +   ret = 0;
>>   sb = inode->i_sb;
>>   parent_ino = le32_to_cpu(((struct ext4_dir_entry_2 *)dir_buf)->inode);
>>   offset = ctx->pos;
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
>> the body of a message to majordomo@...r.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> --
> Jan Kara <jack@...e.cz>
> SUSE Labs, CR
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