* nfs kernel server bug
@ 2021-02-07 17:18 Rue Mohr
2021-02-08 11:58 ` Benjamin Coddington
0 siblings, 1 reply; 3+ messages in thread
From: Rue Mohr @ 2021-02-07 17:18 UTC (permalink / raw)
To: linux-nfs
I'm having an issue where the kernel server is dishing out all zeros for file content being read over NFS. The file byte
count is correct.
Writing files is fine.
With the same client, a different server works just fine.
I have been trying to pin this down, so far all I know is that the packets from the server actually contain zeros for
the file contents.
The troubled server kernel is 5.4.1
Has anyone encountered this or is it just me?
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: nfs kernel server bug
2021-02-07 17:18 nfs kernel server bug Rue Mohr
@ 2021-02-08 11:58 ` Benjamin Coddington
2021-02-23 22:59 ` J. Bruce Fields
0 siblings, 1 reply; 3+ messages in thread
From: Benjamin Coddington @ 2021-02-08 11:58 UTC (permalink / raw)
To: Rue Mohr; +Cc: linux-nfs
On 7 Feb 2021, at 12:18, Rue Mohr wrote:
> I'm having an issue where the kernel server is dishing out all zeros
> for file content being read over NFS. The file byte count is correct.
> Writing files is fine.
> With the same client, a different server works just fine.
>
> I have been trying to pin this down, so far all I know is that the
> packets from the server actually contain zeros for the file contents.
>
> The troubled server kernel is 5.4.1
>
> Has anyone encountered this or is it just me?
Haven't heard of this before, but sounds like a fascinating problem.
What version of nfs, and what security? You're seeing READ operations
returning
with rsize-ed blocks of all-zero data in a network capture?
Ben
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: nfs kernel server bug
2021-02-08 11:58 ` Benjamin Coddington
@ 2021-02-23 22:59 ` J. Bruce Fields
0 siblings, 0 replies; 3+ messages in thread
From: J. Bruce Fields @ 2021-02-23 22:59 UTC (permalink / raw)
To: Benjamin Coddington; +Cc: Rue Mohr, linux-nfs
On Mon, Feb 08, 2021 at 06:58:38AM -0500, Benjamin Coddington wrote:
> On 7 Feb 2021, at 12:18, Rue Mohr wrote:
>
> >I'm having an issue where the kernel server is dishing out all
> >zeros for file content being read over NFS. The file byte count is
> >correct.
> >Writing files is fine.
> >With the same client, a different server works just fine.
> >
> >I have been trying to pin this down, so far all I know is that the
> >packets from the server actually contain zeros for the file
> >contents.
> >
> >The troubled server kernel is 5.4.1
> >
> >Has anyone encountered this or is it just me?
>
> Haven't heard of this before, but sounds like a fascinating problem.
>
> What version of nfs, and what security? You're seeing READ
> operations returning
> with rsize-ed blocks of all-zero data in a network capture?
It might also be useful to know what filesystem you're exporting, with
what mount and export options.
--b.
^ permalink raw reply [flat|nested] 3+ messages in thread
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