Re: [PATCH 0/4] fat: fix ESTALE errors

[Namjae Jeon]

2012/8/18, OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>:
> Al Viro <viro@xxxxxxxxxxxxxxxxxx> writes:
>
>> On Sat, Aug 18, 2012 at 05:41:39AM -0400, Namjae Jeon wrote:
>>> From: Namjae Jeon <namjae.jeon@xxxxxxxxxxx>
>>>
>>> This patch-set eliminates the client side ESTALE errors when
>>> a FAT partition exported over NFS has its dentries evicted
>>> from the cache.
>>>
>>> One of the reasons for this error is lack of permanent inode
>>> numbers on FAT which makes it difficult to construct persistent
>>> file handles.This can be overcome by using the on-disk location
>>> of the directory entries (i_pos) as the inode number.
>>
>> The hell it can.  You've just made them unstable on rename(2).
>
> As more hint. We can't use i_pos as the inode number.
>
> E.g. inode is unlinked but is still opened (orphaned inode), the dir
> entry is free and you can create the inode on same i_pos. After that,
> both inodes have same i_pos (so inode number).
>
> Thanks.
Hi. Ogawa.
Thanks for specific explanation. I will check it.
> --
> OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
>
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