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SubjectRe: [REGRESSION 4.13-rc] NFS returns -EACCESS at the first read
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On 07/26/2017 09:30 AM, Takashi Iwai wrote:
> On Wed, 26 Jul 2017 14:57:07 +0200,
> Anna Schumaker wrote:
>>
>> Hi Takashi,
>>
>> On 07/26/2017 08:54 AM, Takashi Iwai wrote:
>>> Hi,
>>>
>>> I seem hitting a regression of NFS client on the today's Linus git
>>> tree. The symptom is that the file read over NFS returns occasionally
>>> -EACCESS at the first read. When I try to read the same file again
>>> (or do some other thing), I can read it successfully.
>>>
>>> The git bisection leaded to the commit
>>> bd8b2441742b49c76bec707757bd9c028ea9838e
>>> NFS: Store the raw NFS access mask in the inode's access cache
>>>
>>>
>>> Any further hint for debugging?
>>
>> Does the patch in this email thread help? http://www.spinics.net/lists/linux-nfs/msg64930.html
>
> Thanks, I gave it a shot and the result looks good. Feel free to my
> tested-by tag:
> Tested-by: Takashi Iwai <tiwai@suse.de>
>
>
> Though, when I look around the code, I feel somehow uneasy by that
> still MAY_XXX is used for nfs_access_entry.mask, e.g. in
> nfs3_proc_access() or nfs4_proc_access(). Are these function OK
> without the similar conversion?

I just started looking at that at the end of the day yesterday. I think they work by accident, since all the bits in the mask are set by nfs_do_access(). They should probably be converted, but I don't think it's urgent.

Anna

>
>
> thanks,
>
> Takashi
>

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